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 #include "ap.h"
  39
  40
  41 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  42 {
  43         struct wpa_ssid *ssid, *old_ssid;
  44
  45         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  46                 return 0;
  47
  48         wpa_printf(MSG_DEBUG, "Select network based on association "
  49                    "information");
  50         ssid = wpa_supplicant_get_ssid(wpa_s);
  51         if (ssid == NULL) {
  52                 wpa_printf(MSG_INFO, "No network configuration found for the "
  53                            "current AP");
  54                 return -1;
  55         }
  56
  57         if (ssid->disabled) {
  58                 wpa_printf(MSG_DEBUG, "Selected network is disabled");
  59                 return -1;
  60         }
  61
  62         wpa_printf(MSG_DEBUG, "Network configuration found for the current "
  63                    "AP");
  64         if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
  65                               WPA_KEY_MGMT_WPA_NONE |
  66                               WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X |
  67                               WPA_KEY_MGMT_PSK_SHA256 |
  68                               WPA_KEY_MGMT_IEEE8021X_SHA256)) {
  69                 u8 wpa_ie[80];
  70                 size_t wpa_ie_len = sizeof(wpa_ie);
  71                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  72                                           wpa_ie, &wpa_ie_len);
  73         } else {
  74                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  75         }
  76
  77         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  78                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  79         old_ssid = wpa_s->current_ssid;
  80         wpa_s->current_ssid = ssid;
  81         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  82         wpa_supplicant_initiate_eapol(wpa_s);
  83         if (old_ssid != wpa_s->current_ssid)
  84                 wpas_notify_network_changed(wpa_s);
  85
  86         return 0;
  87 }
  88
  89
  90 static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
  91                                                 void *sock_ctx)
  92 {
  93         struct wpa_supplicant *wpa_s = eloop_ctx;
  94
  95         if (wpa_s->countermeasures) {
  96                 wpa_s->countermeasures = 0;
  97                 wpa_drv_set_countermeasures(wpa_s, 0);
  98                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
  99                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 100         }
 101 }
 102
 103
 104 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 105 {
 106         int bssid_changed;
 107
 108         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 109         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 110         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 111         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 112         if (bssid_changed)
 113                 wpas_notify_bssid_changed(wpa_s);
 114
 115         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 116         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 117         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 118                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 119         wpa_s->ap_ies_from_associnfo = 0;
 120 }
 121
 122
 123 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 124 {
 125         struct wpa_ie_data ie;
 126         int pmksa_set = -1;
 127         size_t i;
 128
 129         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 130             ie.pmkid == NULL)
 131                 return;
 132
 133         for (i = 0; i < ie.num_pmkid; i++) {
 134                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 135                                                     ie.pmkid + i * PMKID_LEN,
 136                                                     NULL, NULL, 0);
 137                 if (pmksa_set == 0) {
 138                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 139                         break;
 140                 }
 141         }
 142
 143         wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 144                    "cache", pmksa_set == 0 ? "" : "not ");
 145 }
 146
 147
 148 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 149                                                  union wpa_event_data *data)
 150 {
 151         if (data == NULL) {
 152                 wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 153                 return;
 154         }
 155         wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 156                    " index=%d preauth=%d",
 157                    MAC2STR(data->pmkid_candidate.bssid),
 158                    data->pmkid_candidate.index,
 159                    data->pmkid_candidate.preauth);
 160
 161         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 162                             data->pmkid_candidate.index,
 163                             data->pmkid_candidate.preauth);
 164 }
 165
 166
 167 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 168 {
 169         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 170             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 171                 return 0;
 172
 173 #ifdef IEEE8021X_EAPOL
 174         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 175             wpa_s->current_ssid &&
 176             !(wpa_s->current_ssid->eapol_flags &
 177               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 178                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 179                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 180                  * plaintext or static WEP keys). */
 181                 return 0;
 182         }
 183 #endif /* IEEE8021X_EAPOL */
 184
 185         return 1;
 186 }
 187
 188
 189 /**
 190  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 191  * @wpa_s: pointer to wpa_supplicant data
 192  * @ssid: Configuration data for the network
 193  * Returns: 0 on success, -1 on failure
 194  *
 195  * This function is called when starting authentication with a network that is
 196  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 197  */
 198 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 199                               struct wpa_ssid *ssid)
 200 {
 201 #ifdef IEEE8021X_EAPOL
 202         int aka = 0, sim = 0, type;
 203
 204         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 205                 return 0;
 206
 207         if (ssid->eap.eap_methods == NULL) {
 208                 sim = 1;
 209                 aka = 1;
 210         } else {
 211                 struct eap_method_type *eap = ssid->eap.eap_methods;
 212                 while (eap->vendor != EAP_VENDOR_IETF ||
 213                        eap->method != EAP_TYPE_NONE) {
 214                         if (eap->vendor == EAP_VENDOR_IETF) {
 215                                 if (eap->method == EAP_TYPE_SIM)
 216                                         sim = 1;
 217                                 else if (eap->method == EAP_TYPE_AKA)
 218                                         aka = 1;
 219                         }
 220                         eap++;
 221                 }
 222         }
 223
 224         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 225                 sim = 0;
 226         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 227                 aka = 0;
 228
 229         if (!sim && !aka) {
 230                 wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 231                            "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 232                 return 0;
 233         }
 234
 235         wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 236                    "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 237         if (sim && aka)
 238                 type = SCARD_TRY_BOTH;
 239         else if (aka)
 240                 type = SCARD_USIM_ONLY;
 241         else
 242                 type = SCARD_GSM_SIM_ONLY;
 243
 244         wpa_s->scard = scard_init(type);
 245         if (wpa_s->scard == NULL) {
 246                 wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 247                            "(pcsc-lite)");
 248                 return -1;
 249         }
 250         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 251         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 252 #endif /* IEEE8021X_EAPOL */
 253
 254         return 0;
 255 }
 256
 257
 258 #ifndef CONFIG_NO_SCAN_PROCESSING
 259 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 260                                         struct wpa_ssid *ssid)
 261 {
 262         int i, privacy = 0;
 263
 264         if (ssid->mixed_cell)
 265                 return 1;
 266
 267 #ifdef CONFIG_WPS
 268         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 269                 return 1;
 270 #endif /* CONFIG_WPS */
 271
 272         for (i = 0; i < NUM_WEP_KEYS; i++) {
 273                 if (ssid->wep_key_len[i]) {
 274                         privacy = 1;
 275                         break;
 276                 }
 277         }
 278 #ifdef IEEE8021X_EAPOL
 279         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 280             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 281                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 282                 privacy = 1;
 283 #endif /* IEEE8021X_EAPOL */
 284
 285         if (bss->caps & IEEE80211_CAP_PRIVACY)
 286                 return privacy;
 287         return !privacy;
 288 }
 289
 290
 291 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 292                                          struct wpa_ssid *ssid,
 293                                          struct wpa_scan_res *bss)
 294 {
 295         struct wpa_ie_data ie;
 296         int proto_match = 0;
 297         const u8 *rsn_ie, *wpa_ie;
 298         int ret;
 299
 300         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 301         if (ret >= 0)
 302                 return ret;
 303
 304         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 305         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 306                 proto_match++;
 307
 308                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 309                         wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 310                         break;
 311                 }
 312                 if (!(ie.proto & ssid->proto)) {
 313                         wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 314                                    "mismatch");
 315                         break;
 316                 }
 317
 318                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 319                         wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 320                                    "mismatch");
 321                         break;
 322                 }
 323
 324                 if (!(ie.group_cipher & ssid->group_cipher)) {
 325                         wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 326                                    "mismatch");
 327                         break;
 328                 }
 329
 330                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 331                         wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 332                                    "mismatch");
 333                         break;
 334                 }
 335
 336 #ifdef CONFIG_IEEE80211W
 337                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 338                     ssid->ieee80211w == IEEE80211W_REQUIRED) {
 339                         wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 340                                    "protection");
 341                         break;
 342                 }
 343 #endif /* CONFIG_IEEE80211W */
 344
 345                 wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 346                 return 1;
 347         }
 348
 349         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 350         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 351                 proto_match++;
 352
 353                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 354                         wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 355                         break;
 356                 }
 357                 if (!(ie.proto & ssid->proto)) {
 358                         wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 359                                    "mismatch");
 360                         break;
 361                 }
 362
 363                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 364                         wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 365                                    "mismatch");
 366                         break;
 367                 }
 368
 369                 if (!(ie.group_cipher & ssid->group_cipher)) {
 370                         wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 371                                    "mismatch");
 372                         break;
 373                 }
 374
 375                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 376                         wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 377                                    "mismatch");
 378                         break;
 379                 }
 380
 381                 wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 382                 return 1;
 383         }
 384
 385         if (proto_match == 0)
 386                 wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 387
 388         return 0;
 389 }
 390
 391
 392 static struct wpa_scan_res *
 393 wpa_supplicant_select_bss_wpa(struct wpa_supplicant *wpa_s,
 394                               struct wpa_ssid *group,
 395                               struct wpa_ssid **selected_ssid)
 396 {
 397         struct wpa_ssid *ssid;
 398         struct wpa_scan_res *bss;
 399         size_t i;
 400         struct wpa_blacklist *e;
 401         const u8 *ie;
 402
 403         wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 404         for (i = 0; i < wpa_s->scan_res->num; i++) {
 405                 const u8 *ssid_;
 406                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 407                 bss = wpa_s->scan_res->res[i];
 408
 409                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 410                 ssid_ = ie ? ie + 2 : (u8 *) "";
 411                 ssid_len = ie ? ie[1] : 0;
 412
 413                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 414                 wpa_ie_len = ie ? ie[1] : 0;
 415
 416                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 417                 rsn_ie_len = ie ? ie[1] : 0;
 418
 419                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 420                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 421                            (int) i, MAC2STR(bss->bssid),
 422                            wpa_ssid_txt(ssid_, ssid_len),
 423                            wpa_ie_len, rsn_ie_len, bss->caps);
 424
 425                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 426                 if (e && e->count > 1) {
 427                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 428                         continue;
 429                 }
 430
 431                 if (ssid_len == 0) {
 432                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 433                         continue;
 434                 }
 435
 436                 if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 437                         wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 438                         continue;
 439                 }
 440
 441                 for (ssid = group; ssid; ssid = ssid->pnext) {
 442                         int check_ssid = 1;
 443
 444                         if (ssid->disabled) {
 445                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 446                                 continue;
 447                         }
 448
 449 #ifdef CONFIG_WPS
 450                         if (ssid->ssid_len == 0 &&
 451                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 452                                 check_ssid = 0;
 453 #endif /* CONFIG_WPS */
 454
 455                         if (check_ssid &&
 456                             (ssid_len != ssid->ssid_len ||
 457                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 458                                 wpa_printf(MSG_DEBUG, "   skip - "
 459                                            "SSID mismatch");
 460                                 continue;
 461                         }
 462
 463                         if (ssid->bssid_set &&
 464                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 465                         {
 466                                 wpa_printf(MSG_DEBUG, "   skip - "
 467                                            "BSSID mismatch");
 468                                 continue;
 469                         }
 470
 471                         if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 472                                 continue;
 473
 474                         wpa_printf(MSG_DEBUG, "   selected WPA AP "
 475                                    MACSTR " ssid='%s'",
 476                                    MAC2STR(bss->bssid),
 477                                    wpa_ssid_txt(ssid_, ssid_len));
 478                         *selected_ssid = ssid;
 479                         return bss;
 480                 }
 481         }
 482
 483         return NULL;
 484 }
 485
 486
 487 static struct wpa_scan_res *
 488 wpa_supplicant_select_bss_non_wpa(struct wpa_supplicant *wpa_s,
 489                                   struct wpa_ssid *group,
 490                                   struct wpa_ssid **selected_ssid)
 491 {
 492         struct wpa_ssid *ssid;
 493         struct wpa_scan_res *bss;
 494         size_t i;
 495         struct wpa_blacklist *e;
 496         const u8 *ie;
 497
 498         wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 499         for (i = 0; i < wpa_s->scan_res->num; i++) {
 500                 const u8 *ssid_;
 501                 u8 wpa_ie_len, rsn_ie_len, ssid_len;
 502                 bss = wpa_s->scan_res->res[i];
 503
 504                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 505                 ssid_ = ie ? ie + 2 : (u8 *) "";
 506                 ssid_len = ie ? ie[1] : 0;
 507
 508                 ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 509                 wpa_ie_len = ie ? ie[1] : 0;
 510
 511                 ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 512                 rsn_ie_len = ie ? ie[1] : 0;
 513
 514                 wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 515                            "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 516                            (int) i, MAC2STR(bss->bssid),
 517                            wpa_ssid_txt(ssid_, ssid_len),
 518                            wpa_ie_len, rsn_ie_len, bss->caps);
 519
 520                 e = wpa_blacklist_get(wpa_s, bss->bssid);
 521                 if (e && e->count > 1) {
 522                         wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 523                         continue;
 524                 }
 525
 526                 if (ssid_len == 0) {
 527                         wpa_printf(MSG_DEBUG, "   skip - SSID not known");
 528                         continue;
 529                 }
 530
 531                 for (ssid = group; ssid; ssid = ssid->pnext) {
 532                         int check_ssid = ssid->ssid_len != 0;
 533
 534                         if (ssid->disabled) {
 535                                 wpa_printf(MSG_DEBUG, "   skip - disabled");
 536                                 continue;
 537                         }
 538
 539 #ifdef CONFIG_WPS
 540                         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 541                                 /* Only allow wildcard SSID match if an AP
 542                                  * advertises active WPS operation that matches
 543                                  * with our mode. */
 544                                 check_ssid = 1;
 545                                 if (ssid->ssid_len == 0 &&
 546                                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid,
 547                                                               bss))
 548                                         check_ssid = 0;
 549                         }
 550 #endif /* CONFIG_WPS */
 551
 552                         if (check_ssid &&
 553                             (ssid_len != ssid->ssid_len ||
 554                              os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 555                                 wpa_printf(MSG_DEBUG, "   skip - "
 556                                            "SSID mismatch");
 557                                 continue;
 558                         }
 559
 560                         if (ssid->bssid_set &&
 561                             os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 562                         {
 563                                 wpa_printf(MSG_DEBUG, "   skip - "
 564                                            "BSSID mismatch");
 565                                 continue;
 566                         }
 567
 568                         if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 569                             !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 570                             !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 571                         {
 572                                 wpa_printf(MSG_DEBUG, "   skip - "
 573                                            "non-WPA network not allowed");
 574                                 continue;
 575                         }
 576
 577                         if ((ssid->key_mgmt &
 578                              (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
 579                               WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_FT_PSK |
 580                               WPA_KEY_MGMT_IEEE8021X_SHA256 |
 581                               WPA_KEY_MGMT_PSK_SHA256)) &&
 582                             (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 583                                 wpa_printf(MSG_DEBUG, "   skip - "
 584                                            "WPA network");
 585                                 continue;
 586                         }
 587
 588                         if (!wpa_supplicant_match_privacy(bss, ssid)) {
 589                                 wpa_printf(MSG_DEBUG, "   skip - "
 590                                            "privacy mismatch");
 591                                 continue;
 592                         }
 593
 594                         if (bss->caps & IEEE80211_CAP_IBSS) {
 595                                 wpa_printf(MSG_DEBUG, "   skip - "
 596                                            "IBSS (adhoc) network");
 597                                 continue;
 598                         }
 599
 600                         wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 601                                    MACSTR " ssid='%s'",
 602                                    MAC2STR(bss->bssid),
 603                                    wpa_ssid_txt(ssid_, ssid_len));
 604                         *selected_ssid = ssid;
 605                         return bss;
 606                 }
 607         }
 608
 609         return NULL;
 610 }
 611
 612
 613 static struct wpa_scan_res *
 614 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 615                           struct wpa_ssid **selected_ssid)
 616 {
 617         struct wpa_scan_res *selected;
 618
 619         wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 620                    group->priority);
 621
 622         /* First, try to find WPA-enabled AP */
 623         selected = wpa_supplicant_select_bss_wpa(wpa_s, group, selected_ssid);
 624         if (selected)
 625                 return selected;
 626
 627         /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 628          * allows this. */
 629         return wpa_supplicant_select_bss_non_wpa(wpa_s, group, selected_ssid);
 630 }
 631
 632
 633 static struct wpa_scan_res *
 634 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 635                             struct wpa_ssid **selected_ssid)
 636 {
 637         struct wpa_scan_res *selected = NULL;
 638         int prio;
 639
 640         while (selected == NULL) {
 641                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 642                         selected = wpa_supplicant_select_bss(
 643                                 wpa_s, wpa_s->conf->pssid[prio],
 644                                 selected_ssid);
 645                         if (selected)
 646                                 break;
 647                 }
 648
 649                 if (selected == NULL && wpa_s->blacklist) {
 650                         wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 651                                    "and try again");
 652                         wpa_blacklist_clear(wpa_s);
 653                         wpa_s->blacklist_cleared++;
 654                 } else if (selected == NULL)
 655                         break;
 656         }
 657
 658         return selected;
 659 }
 660
 661
 662 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 663                                         int timeout)
 664 {
 665         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 666                 /*
 667                  * Quick recovery if the initial scan results were not
 668                  * complete when fetched before the first scan request.
 669                  */
 670                 wpa_s->scan_res_tried++;
 671                 timeout = 0;
 672         } else if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
 673                 /*
 674                  * No networks are enabled; short-circuit request so
 675                  * we don't wait timeout seconds before transitioning
 676                  * to INACTIVE state.
 677                  */
 678                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
 679                 return;
 680         }
 681         wpa_supplicant_req_scan(wpa_s, timeout, 0);
 682 }
 683
 684
 685 static void wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 686                                    struct wpa_scan_res *selected,
 687                                    struct wpa_ssid *ssid)
 688 {
 689         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 690                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 691                         "PBC session overlap");
 692                 wpa_supplicant_req_new_scan(wpa_s, 10);
 693                 return;
 694         }
 695
 696         /*
 697          * Do not trigger new association unless the BSSID has changed or if
 698          * reassociation is requested. If we are in process of associating with
 699          * the selected BSSID, do not trigger new attempt.
 700          */
 701         if (wpa_s->reassociate ||
 702             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 703              (wpa_s->wpa_state != WPA_ASSOCIATING ||
 704               os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
 705               0))) {
 706                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 707                         wpa_supplicant_req_new_scan(wpa_s, 10);
 708                         return;
 709                 }
 710                 wpa_supplicant_associate(wpa_s, selected, ssid);
 711         } else {
 712                 wpa_printf(MSG_DEBUG, "Already associated with the selected "
 713                            "AP");
 714         }
 715 }
 716
 717
 718 static struct wpa_ssid *
 719 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 720 {
 721         int prio;
 722         struct wpa_ssid *ssid;
 723
 724         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 725                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
 726                 {
 727                         if (ssid->disabled)
 728                                 continue;
 729                         if (ssid->mode == IEEE80211_MODE_IBSS ||
 730                             ssid->mode == IEEE80211_MODE_AP)
 731                                 return ssid;
 732                 }
 733         }
 734         return NULL;
 735 }
 736
 737
 738 static void wpa_supplicant_rsn_preauth_scan_results(
 739         struct wpa_supplicant *wpa_s)
 740 {
 741         int i;
 742
 743         if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
 744                 return;
 745
 746         for (i = wpa_s->scan_res->num - 1; i >= 0; i--) {
 747                 const u8 *ssid, *rsn;
 748                 struct wpa_scan_res *r;
 749
 750                 r = wpa_s->scan_res->res[i];
 751
 752                 ssid = wpa_scan_get_ie(r, WLAN_EID_SSID);
 753                 if (ssid == NULL)
 754                         continue;
 755
 756                 rsn = wpa_scan_get_ie(r, WLAN_EID_RSN);
 757                 if (rsn == NULL)
 758                         continue;
 759
 760                 rsn_preauth_scan_result(wpa_s->wpa, r->bssid, ssid, rsn);
 761         }
 762
 763 }
 764
 765
 766 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 767 {
 768         struct wpa_scan_res *selected;
 769         struct wpa_ssid *ssid = NULL;
 770
 771         wpa_supplicant_notify_scanning(wpa_s, 0);
 772
 773         if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 774                 if (wpa_s->conf->ap_scan == 2)
 775                         return;
 776                 wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 777                            "scanning again");
 778                 wpa_supplicant_req_new_scan(wpa_s, 1);
 779                 return;
 780         }
 781
 782         /*
 783          * Don't post the results if this was the initial cached
 784          * and there were no results.
 785          */
 786         if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1 &&
 787             wpa_s->scan_res->num == 0) {
 788                 wpa_msg(wpa_s, MSG_DEBUG, "Cached scan results are "
 789                         "empty - not posting");
 790         } else {
 791                 wpa_printf(MSG_DEBUG, "New scan results available");
 792                 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 793                 wpas_notify_scan_results(wpa_s);
 794         }
 795
 796         wpas_notify_scan_done(wpa_s, 1);
 797
 798         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
 799                 return;
 800
 801         if (wpa_s->disconnected) {
 802                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 803                 return;
 804         }
 805
 806         if (bgscan_notify_scan(wpa_s) == 1)
 807                 return;
 808
 809         wpa_supplicant_rsn_preauth_scan_results(wpa_s);
 810
 811         selected = wpa_supplicant_pick_network(wpa_s, &ssid);
 812         if (selected) {
 813                 wpa_supplicant_connect(wpa_s, selected, ssid);
 814         } else {
 815                 wpa_printf(MSG_DEBUG, "No suitable network found");
 816                 ssid = wpa_supplicant_pick_new_network(wpa_s);
 817                 if (ssid) {
 818                         wpa_printf(MSG_DEBUG, "Setup a new network");
 819                         wpa_supplicant_associate(wpa_s, NULL, ssid);
 820                 } else
 821                         wpa_supplicant_req_new_scan(wpa_s, 5);
 822         }
 823 }
 824 #endif /* CONFIG_NO_SCAN_PROCESSING */
 825
 826
 827 #ifdef CONFIG_IEEE80211R
 828 static void wpa_assoc_set_ft_params(struct wpa_supplicant *wpa_s,
 829                                     const u8 *ftie, const u8 *mdie)
 830 {
 831         const u8 *mobility_domain = NULL;
 832         const u8 *r0kh_id = NULL;
 833         size_t r0kh_id_len = 0;
 834         const u8 *r1kh_id = NULL;
 835         struct rsn_ftie *hdr;
 836         const u8 *pos, *end;
 837
 838         if (mdie == NULL || ftie == NULL)
 839                 return;
 840
 841         if (mdie[1] >= MOBILITY_DOMAIN_ID_LEN) {
 842                 mobility_domain = mdie + 2;
 843 #ifdef CONFIG_SME
 844                 wpa_s->sme.ft_used = 1;
 845                 os_memcpy(wpa_s->sme.mobility_domain, mobility_domain, 2);
 846 #endif /* CONFIG_SME */
 847         }
 848         if (ftie[1] >= sizeof(struct rsn_ftie)) {
 849                 end = ftie + 2 + ftie[1];
 850                 hdr = (struct rsn_ftie *) (ftie + 2);
 851                 pos = (const u8 *) (hdr + 1);
 852                 while (pos + 1 < end) {
 853                         if (pos + 2 + pos[1] > end)
 854                                 break;
 855                         if (pos[0] == FTIE_SUBELEM_R1KH_ID &&
 856                             pos[1] == FT_R1KH_ID_LEN)
 857                                 r1kh_id = pos + 2;
 858                         else if (pos[0] == FTIE_SUBELEM_R0KH_ID &&
 859                                  pos[1] >= 1 && pos[1] <= FT_R0KH_ID_MAX_LEN) {
 860                                 r0kh_id = pos + 2;
 861                                 r0kh_id_len = pos[1];
 862                         }
 863                         pos += 2 + pos[1];
 864                 }
 865         }
 866         wpa_sm_set_ft_params(wpa_s->wpa, mobility_domain, r0kh_id,
 867                              r0kh_id_len, r1kh_id);
 868 }
 869 #endif /* CONFIG_IEEE80211R */
 870
 871 static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 872                                            union wpa_event_data *data)
 873 {
 874         int l, len, found = 0, wpa_found, rsn_found;
 875         const u8 *p;
 876 #ifdef CONFIG_IEEE80211R
 877         const u8 *mdie = NULL, *ftie = NULL;
 878 #endif /* CONFIG_IEEE80211R */
 879
 880         wpa_printf(MSG_DEBUG, "Association info event");
 881         if (data->assoc_info.req_ies)
 882                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 883                             data->assoc_info.req_ies_len);
 884         if (data->assoc_info.resp_ies)
 885                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 886                             data->assoc_info.resp_ies_len);
 887         if (data->assoc_info.beacon_ies)
 888                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
 889                             data->assoc_info.beacon_ies,
 890                             data->assoc_info.beacon_ies_len);
 891         if (data->assoc_info.freq)
 892                 wpa_printf(MSG_DEBUG, "freq=%u MHz", data->assoc_info.freq);
 893
 894         p = data->assoc_info.req_ies;
 895         l = data->assoc_info.req_ies_len;
 896
 897         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 898         while (p && l >= 2) {
 899                 len = p[1] + 2;
 900                 if (len > l) {
 901                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 902                                     p, l);
 903                         break;
 904                 }
 905                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 906                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 907                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 908                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 909                                 break;
 910                         found = 1;
 911                         wpa_find_assoc_pmkid(wpa_s);
 912                         break;
 913                 }
 914                 l -= len;
 915                 p += len;
 916         }
 917         if (!found && data->assoc_info.req_ies)
 918                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 919
 920 #ifdef CONFIG_IEEE80211R
 921         p = data->assoc_info.resp_ies;
 922         l = data->assoc_info.resp_ies_len;
 923
 924         /* Go through the IEs and make a copy of the FT/MD IE, if present. */
 925         while (p && l >= 2) {
 926                 len = p[1] + 2;
 927                 if (len > l) {
 928                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 929                                     p, l);
 930                         break;
 931                 }
 932                 if (p[0] == WLAN_EID_FAST_BSS_TRANSITION)
 933                         ftie = p;
 934                 else if (p[0] == WLAN_EID_MOBILITY_DOMAIN)
 935                         mdie = p;
 936                 l -= len;
 937                 p += len;
 938         }
 939
 940         wpa_assoc_set_ft_params(wpa_s, ftie, mdie);
 941 #endif /* CONFIG_IEEE80211R */
 942
 943         /* WPA/RSN IE from Beacon/ProbeResp */
 944         p = data->assoc_info.beacon_ies;
 945         l = data->assoc_info.beacon_ies_len;
 946
 947         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 948          */
 949         wpa_found = rsn_found = 0;
 950         while (p && l >= 2) {
 951                 len = p[1] + 2;
 952                 if (len > l) {
 953                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 954                                     p, l);
 955                         break;
 956                 }
 957                 if (!wpa_found &&
 958                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 959                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 960                         wpa_found = 1;
 961                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 962                 }
 963
 964                 if (!rsn_found &&
 965                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
 966                         rsn_found = 1;
 967                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 968                 }
 969
 970                 l -= len;
 971                 p += len;
 972         }
 973
 974         if (!wpa_found && data->assoc_info.beacon_ies)
 975                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 976         if (!rsn_found && data->assoc_info.beacon_ies)
 977                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 978         if (wpa_found || rsn_found)
 979                 wpa_s->ap_ies_from_associnfo = 1;
 980
 981         wpa_s->assoc_freq = data->assoc_info.freq;
 982 }
 983
 984
 985 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 986                                        union wpa_event_data *data)
 987 {
 988         u8 bssid[ETH_ALEN];
 989         int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
 990         int bssid_changed;
 991         struct wpa_driver_capa capa;
 992
 993         if (data)
 994                 wpa_supplicant_event_associnfo(wpa_s, data);
 995
 996         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 997         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)
 998                 os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
 999         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME) ||
1000             (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
1001              os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
1002                 wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1003                         MACSTR, MAC2STR(bssid));
1004                 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1005                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1006                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1007                 if (bssid_changed)
1008                         wpas_notify_bssid_changed(wpa_s);
1009
1010                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1011                         wpa_clear_keys(wpa_s, bssid);
1012                 }
1013                 if (wpa_supplicant_select_config(wpa_s) < 0) {
1014                         wpa_supplicant_disassociate(
1015                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1016                         return;
1017                 }
1018         }
1019
1020 #ifdef CONFIG_SME
1021         os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1022         wpa_s->sme.prev_bssid_set = 1;
1023 #endif /* CONFIG_SME */
1024
1025         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1026         if (wpa_s->current_ssid) {
1027                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1028                  * initialized before association, but for other modes,
1029                  * initialize PC/SC here, if the current configuration needs
1030                  * smartcard or SIM/USIM. */
1031                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1032         }
1033         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1034         l2_packet_notify_auth_start(wpa_s->l2);
1035
1036         /*
1037          * Set portEnabled first to FALSE in order to get EAP state machine out
1038          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1039          * state machine may transit to AUTHENTICATING state based on obsolete
1040          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1041          * AUTHENTICATED without ever giving chance to EAP state machine to
1042          * reset the state.
1043          */
1044         if (!ft_completed) {
1045                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1046                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1047         }
1048         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1049                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1050         /* 802.1X::portControl = Auto */
1051         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1052         wpa_s->eapol_received = 0;
1053         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1054             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1055             (wpa_s->current_ssid &&
1056              wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1057                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1058                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1059         } else if (!ft_completed) {
1060                 /* Timeout for receiving the first EAPOL packet */
1061                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1062         }
1063         wpa_supplicant_cancel_scan(wpa_s);
1064
1065         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1066             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1067                 /*
1068                  * We are done; the driver will take care of RSN 4-way
1069                  * handshake.
1070                  */
1071                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1072                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1073                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1074                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1075         }
1076
1077         if (wpa_s->pending_eapol_rx) {
1078                 struct os_time now, age;
1079                 os_get_time(&now);
1080                 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1081                 if (age.sec == 0 && age.usec < 100000 &&
1082                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1083                     0) {
1084                         wpa_printf(MSG_DEBUG, "Process pending EAPOL frame "
1085                                    "that was received just before association "
1086                                    "notification");
1087                         wpa_supplicant_rx_eapol(
1088                                 wpa_s, wpa_s->pending_eapol_rx_src,
1089                                 wpabuf_head(wpa_s->pending_eapol_rx),
1090                                 wpabuf_len(wpa_s->pending_eapol_rx));
1091                 }
1092                 wpabuf_free(wpa_s->pending_eapol_rx);
1093                 wpa_s->pending_eapol_rx = NULL;
1094         }
1095
1096 #ifdef CONFIG_BGSCAN
1097         if (wpa_s->current_ssid != wpa_s->bgscan_ssid) {
1098                 bgscan_deinit(wpa_s);
1099                 if (wpa_s->current_ssid && wpa_s->current_ssid->bgscan) {
1100                         if (bgscan_init(wpa_s, wpa_s->current_ssid)) {
1101                                 wpa_printf(MSG_DEBUG, "Failed to initialize "
1102                                            "bgscan");
1103                                 /*
1104                                  * Live without bgscan; it is only used as a
1105                                  * roaming optimization, so the initial
1106                                  * connection is not affected.
1107                                  */
1108                         } else
1109                                 wpa_s->bgscan_ssid = wpa_s->current_ssid;
1110                 } else
1111                         wpa_s->bgscan_ssid = NULL;
1112         }
1113 #endif /* CONFIG_BGSCAN */
1114
1115         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1116              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1117             wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1118             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1119                 /* Set static WEP keys again */
1120                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1121         }
1122 }
1123
1124
1125 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
1126 {
1127         const u8 *bssid;
1128 #ifdef CONFIG_SME
1129         int authenticating;
1130         u8 prev_pending_bssid[ETH_ALEN];
1131
1132         authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1133         os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1134 #endif /* CONFIG_SME */
1135
1136         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1137                 /*
1138                  * At least Host AP driver and a Prism3 card seemed to be
1139                  * generating streams of disconnected events when configuring
1140                  * IBSS for WPA-None. Ignore them for now.
1141                  */
1142                 wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
1143                            "IBSS/WPA-None mode");
1144                 return;
1145         }
1146
1147         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1148             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1149                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1150                         "pre-shared key may be incorrect");
1151         }
1152         if (wpa_s->wpa_state >= WPA_ASSOCIATED)
1153                 wpa_supplicant_req_scan(wpa_s, 0, 100000);
1154         bssid = wpa_s->bssid;
1155         if (is_zero_ether_addr(bssid))
1156                 bssid = wpa_s->pending_bssid;
1157         wpa_blacklist_add(wpa_s, bssid);
1158         wpa_sm_notify_disassoc(wpa_s->wpa);
1159         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
1160                 "remove keys");
1161         if (wpa_supplicant_dynamic_keys(wpa_s)) {
1162                 wpa_s->keys_cleared = 0;
1163                 wpa_clear_keys(wpa_s, wpa_s->bssid);
1164         }
1165         wpa_supplicant_mark_disassoc(wpa_s);
1166         bgscan_deinit(wpa_s);
1167 #ifdef CONFIG_SME
1168         if (authenticating &&
1169             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
1170                 /*
1171                  * mac80211-workaround to force deauth on failed auth cmd,
1172                  * requires us to remain in authenticating state to allow the
1173                  * second authentication attempt to be continued properly.
1174                  */
1175                 wpa_printf(MSG_DEBUG, "SME: Allow pending authentication to "
1176                            "proceed after disconnection event");
1177                 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
1178                 os_memcpy(wpa_s->pending_bssid, prev_pending_bssid, ETH_ALEN);
1179         }
1180 #endif /* CONFIG_SME */
1181 }
1182
1183
1184 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1185 static void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx,
1186                                                     void *sock_ctx)
1187 {
1188         struct wpa_supplicant *wpa_s = eloop_ctx;
1189
1190         if (!wpa_s->pending_mic_error_report)
1191                 return;
1192
1193         wpa_printf(MSG_DEBUG, "WPA: Sending pending MIC error report");
1194         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1195         wpa_s->pending_mic_error_report = 0;
1196 }
1197 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1198
1199
1200 static void
1201 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1202                                          union wpa_event_data *data)
1203 {
1204         int pairwise;
1205         struct os_time t;
1206
1207         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1208         pairwise = (data && data->michael_mic_failure.unicast);
1209         os_get_time(&t);
1210         if ((wpa_s->last_michael_mic_error &&
1211              t.sec - wpa_s->last_michael_mic_error <= 60) ||
1212             wpa_s->pending_mic_error_report) {
1213                 if (wpa_s->pending_mic_error_report) {
1214                         /*
1215                          * Send the pending MIC error report immediately since
1216                          * we are going to start countermeasures and AP better
1217                          * do the same.
1218                          */
1219                         wpa_sm_key_request(wpa_s->wpa, 1,
1220                                            wpa_s->pending_mic_error_pairwise);
1221                 }
1222
1223                 /* Send the new MIC error report immediately since we are going
1224                  * to start countermeasures and AP better do the same.
1225                  */
1226                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1227
1228                 /* initialize countermeasures */
1229                 wpa_s->countermeasures = 1;
1230                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1231
1232                 /*
1233                  * Need to wait for completion of request frame. We do not get
1234                  * any callback for the message completion, so just wait a
1235                  * short while and hope for the best. */
1236                 os_sleep(0, 10000);
1237
1238                 wpa_drv_set_countermeasures(wpa_s, 1);
1239                 wpa_supplicant_deauthenticate(wpa_s,
1240                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
1241                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1242                                      wpa_s, NULL);
1243                 eloop_register_timeout(60, 0,
1244                                        wpa_supplicant_stop_countermeasures,
1245                                        wpa_s, NULL);
1246                 /* TODO: mark the AP rejected for 60 second. STA is
1247                  * allowed to associate with another AP.. */
1248         } else {
1249 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1250                 if (wpa_s->mic_errors_seen) {
1251                         /*
1252                          * Reduce the effectiveness of Michael MIC error
1253                          * reports as a means for attacking against TKIP if
1254                          * more than one MIC failure is noticed with the same
1255                          * PTK. We delay the transmission of the reports by a
1256                          * random time between 0 and 60 seconds in order to
1257                          * force the attacker wait 60 seconds before getting
1258                          * the information on whether a frame resulted in a MIC
1259                          * failure.
1260                          */
1261                         u8 rval[4];
1262                         int sec;
1263
1264                         if (os_get_random(rval, sizeof(rval)) < 0)
1265                                 sec = os_random() % 60;
1266                         else
1267                                 sec = WPA_GET_BE32(rval) % 60;
1268                         wpa_printf(MSG_DEBUG, "WPA: Delay MIC error report %d "
1269                                    "seconds", sec);
1270                         wpa_s->pending_mic_error_report = 1;
1271                         wpa_s->pending_mic_error_pairwise = pairwise;
1272                         eloop_cancel_timeout(
1273                                 wpa_supplicant_delayed_mic_error_report,
1274                                 wpa_s, NULL);
1275                         eloop_register_timeout(
1276                                 sec, os_random() % 1000000,
1277                                 wpa_supplicant_delayed_mic_error_report,
1278                                 wpa_s, NULL);
1279                 } else {
1280                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1281                 }
1282 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1283                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1284 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1285         }
1286         wpa_s->last_michael_mic_error = t.sec;
1287         wpa_s->mic_errors_seen++;
1288 }
1289
1290
1291 #ifdef CONFIG_TERMINATE_ONLASTIF
1292 static int any_interfaces(struct wpa_supplicant *head)
1293 {
1294         struct wpa_supplicant *wpa_s;
1295
1296         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1297                 if (!wpa_s->interface_removed)
1298                         return 1;
1299         return 0;
1300 }
1301 #endif /* CONFIG_TERMINATE_ONLASTIF */
1302
1303
1304 static void
1305 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1306                                       union wpa_event_data *data)
1307 {
1308         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1309                 return;
1310
1311         switch (data->interface_status.ievent) {
1312         case EVENT_INTERFACE_ADDED:
1313                 if (!wpa_s->interface_removed)
1314                         break;
1315                 wpa_s->interface_removed = 0;
1316                 wpa_printf(MSG_DEBUG, "Configured interface was added.");
1317                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1318                         wpa_printf(MSG_INFO, "Failed to initialize the driver "
1319                                    "after interface was added.");
1320                 }
1321                 break;
1322         case EVENT_INTERFACE_REMOVED:
1323                 wpa_printf(MSG_DEBUG, "Configured interface was removed.");
1324                 wpa_s->interface_removed = 1;
1325                 wpa_supplicant_mark_disassoc(wpa_s);
1326                 l2_packet_deinit(wpa_s->l2);
1327                 wpa_s->l2 = NULL;
1328 #ifdef CONFIG_TERMINATE_ONLASTIF
1329                 /* check if last interface */
1330                 if (!any_interfaces(wpa_s->global->ifaces))
1331                         eloop_terminate();
1332 #endif /* CONFIG_TERMINATE_ONLASTIF */
1333                 break;
1334         }
1335 }
1336
1337
1338 #ifdef CONFIG_PEERKEY
1339 static void
1340 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1341                               union wpa_event_data *data)
1342 {
1343         if (data == NULL)
1344                 return;
1345         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1346 }
1347 #endif /* CONFIG_PEERKEY */
1348
1349
1350 #ifdef CONFIG_IEEE80211R
1351 static void
1352 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1353                                  union wpa_event_data *data)
1354 {
1355         if (data == NULL)
1356                 return;
1357
1358         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1359                                     data->ft_ies.ies_len,
1360                                     data->ft_ies.ft_action,
1361                                     data->ft_ies.target_ap,
1362                                     data->ft_ies.ric_ies,
1363                                     data->ft_ies.ric_ies_len) < 0) {
1364                 /* TODO: prevent MLME/driver from trying to associate? */
1365         }
1366 }
1367 #endif /* CONFIG_IEEE80211R */
1368
1369
1370 #ifdef CONFIG_IBSS_RSN
1371 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1372                                                 union wpa_event_data *data)
1373 {
1374         if (data == NULL)
1375                 return;
1376         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1377 }
1378 #endif /* CONFIG_IBSS_RSN */
1379
1380
1381 void wpa_supplicant_event(void *ctx, wpa_event_type event,
1382                           union wpa_event_data *data)
1383 {
1384         struct wpa_supplicant *wpa_s = ctx;
1385
1386         switch (event) {
1387         case EVENT_AUTH:
1388                 sme_event_auth(wpa_s, data);
1389                 break;
1390         case EVENT_ASSOC:
1391                 wpa_supplicant_event_assoc(wpa_s, data);
1392                 break;
1393         case EVENT_DISASSOC:
1394                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
1395                         sme_event_disassoc(wpa_s, data);
1396                 /* fall through */
1397         case EVENT_DEAUTH:
1398                 wpa_supplicant_event_disassoc(wpa_s);
1399                 break;
1400         case EVENT_MICHAEL_MIC_FAILURE:
1401                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
1402                 break;
1403 #ifndef CONFIG_NO_SCAN_PROCESSING
1404         case EVENT_SCAN_RESULTS:
1405                 wpa_supplicant_event_scan_results(wpa_s);
1406                 break;
1407 #endif /* CONFIG_NO_SCAN_PROCESSING */
1408         case EVENT_ASSOCINFO:
1409                 wpa_supplicant_event_associnfo(wpa_s, data);
1410                 break;
1411         case EVENT_INTERFACE_STATUS:
1412                 wpa_supplicant_event_interface_status(wpa_s, data);
1413                 break;
1414         case EVENT_PMKID_CANDIDATE:
1415                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
1416                 break;
1417 #ifdef CONFIG_PEERKEY
1418         case EVENT_STKSTART:
1419                 wpa_supplicant_event_stkstart(wpa_s, data);
1420                 break;
1421 #endif /* CONFIG_PEERKEY */
1422 #ifdef CONFIG_IEEE80211R
1423         case EVENT_FT_RESPONSE:
1424                 wpa_supplicant_event_ft_response(wpa_s, data);
1425                 break;
1426 #endif /* CONFIG_IEEE80211R */
1427 #ifdef CONFIG_IBSS_RSN
1428         case EVENT_IBSS_RSN_START:
1429                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
1430                 break;
1431 #endif /* CONFIG_IBSS_RSN */
1432         case EVENT_ASSOC_REJECT:
1433                 sme_event_assoc_reject(wpa_s, data);
1434                 break;
1435         case EVENT_AUTH_TIMED_OUT:
1436                 sme_event_auth_timed_out(wpa_s, data);
1437                 break;
1438         case EVENT_ASSOC_TIMED_OUT:
1439                 sme_event_assoc_timed_out(wpa_s, data);
1440                 break;
1441 #ifdef CONFIG_AP
1442         case EVENT_TX_STATUS:
1443                 if (wpa_s->ap_iface == NULL)
1444                         break;
1445                 switch (data->tx_status.type) {
1446                 case WLAN_FC_TYPE_MGMT:
1447                         ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
1448                                       data->tx_status.data_len,
1449                                       data->tx_status.stype,
1450                                       data->tx_status.ack);
1451                         break;
1452                 case WLAN_FC_TYPE_DATA:
1453                         ap_tx_status(wpa_s, data->tx_status.dst,
1454                                      data->tx_status.data,
1455                                      data->tx_status.data_len,
1456                                      data->tx_status.ack);
1457                         break;
1458                 }
1459                 break;
1460         case EVENT_RX_FROM_UNKNOWN:
1461                 if (wpa_s->ap_iface == NULL)
1462                         break;
1463                 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.hdr,
1464                                        data->rx_from_unknown.len);
1465                 break;
1466         case EVENT_RX_MGMT:
1467                 if (wpa_s->ap_iface == NULL)
1468                         break;
1469                 ap_mgmt_rx(wpa_s, data->rx_mgmt.frame,
1470                            data->rx_mgmt.frame_len, data->rx_mgmt.fi);
1471                 break;
1472 #endif /* CONFIG_AP */
1473         default:
1474                 wpa_printf(MSG_INFO, "Unknown event %d", event);
1475                 break;
1476         }
1477 }