wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2011, 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 "ap/hostapd.h"
  31 #include "p2p/p2p.h"
  32 #include "notify.h"
  33 #include "common/ieee802_11_defs.h"
  34 #include "common/ieee802_11_common.h"
  35 #include "crypto/random.h"
  36 #include "blacklist.h"
  37 #include "wpas_glue.h"
  38 #include "wps_supplicant.h"
  39 #include "ibss_rsn.h"
  40 #include "sme.h"
  41 #include "gas_query.h"
  42 #include "p2p_supplicant.h"
  43 #include "bgscan.h"
  44 #include "ap.h"
  45 #include "bss.h"
  46 #include "scan.h"
  47 #include "offchannel.h"
  48
  49
  50 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  51 {
  52         struct wpa_ssid *ssid, *old_ssid;
  53
  54         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  55                 return 0;
  56
  57         wpa_dbg(wpa_s, MSG_DEBUG, "Select network based on association "
  58                 "information");
  59         ssid = wpa_supplicant_get_ssid(wpa_s);
  60         if (ssid == NULL) {
  61                 wpa_msg(wpa_s, MSG_INFO,
  62                         "No network configuration found for the current AP");
  63                 return -1;
  64         }
  65
  66         if (ssid->disabled) {
  67                 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is disabled");
  68                 return -1;
  69         }
  70
  71         wpa_dbg(wpa_s, MSG_DEBUG, "Network configuration found for the "
  72                 "current AP");
  73         if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
  74                 u8 wpa_ie[80];
  75                 size_t wpa_ie_len = sizeof(wpa_ie);
  76                 wpa_supplicant_set_suites(wpa_s, NULL, ssid,
  77                                           wpa_ie, &wpa_ie_len);
  78         } else {
  79                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
  80         }
  81
  82         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
  83                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
  84         old_ssid = wpa_s->current_ssid;
  85         wpa_s->current_ssid = ssid;
  86         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
  87         wpa_supplicant_initiate_eapol(wpa_s);
  88         if (old_ssid != wpa_s->current_ssid)
  89                 wpas_notify_network_changed(wpa_s);
  90
  91         return 0;
  92 }
  93
  94
  95 void wpa_supplicant_stop_countermeasures(void *eloop_ctx, void *sock_ctx)
  96 {
  97         struct wpa_supplicant *wpa_s = eloop_ctx;
  98
  99         if (wpa_s->countermeasures) {
 100                 wpa_s->countermeasures = 0;
 101                 wpa_drv_set_countermeasures(wpa_s, 0);
 102                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
 103                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 104         }
 105 }
 106
 107
 108 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 109 {
 110         int bssid_changed;
 111
 112 #ifdef CONFIG_IBSS_RSN
 113         ibss_rsn_deinit(wpa_s->ibss_rsn);
 114         wpa_s->ibss_rsn = NULL;
 115 #endif /* CONFIG_IBSS_RSN */
 116
 117 #ifdef CONFIG_AP
 118         wpa_supplicant_ap_deinit(wpa_s);
 119 #endif /* CONFIG_AP */
 120
 121         if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
 122                 return;
 123
 124         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 125         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 126         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 127         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 128         wpa_s->current_bss = NULL;
 129         wpa_s->assoc_freq = 0;
 130 #ifdef CONFIG_IEEE80211R
 131 #ifdef CONFIG_SME
 132         if (wpa_s->sme.ft_ies)
 133                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
 134 #endif /* CONFIG_SME */
 135 #endif /* CONFIG_IEEE80211R */
 136
 137         if (bssid_changed)
 138                 wpas_notify_bssid_changed(wpa_s);
 139
 140         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 141         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 142         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 143                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 144         wpa_s->ap_ies_from_associnfo = 0;
 145 }
 146
 147
 148 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 149 {
 150         struct wpa_ie_data ie;
 151         int pmksa_set = -1;
 152         size_t i;
 153
 154         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 155             ie.pmkid == NULL)
 156                 return;
 157
 158         for (i = 0; i < ie.num_pmkid; i++) {
 159                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 160                                                     ie.pmkid + i * PMKID_LEN,
 161                                                     NULL, NULL, 0);
 162                 if (pmksa_set == 0) {
 163                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 164                         break;
 165                 }
 166         }
 167
 168         wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from "
 169                 "PMKSA cache", pmksa_set == 0 ? "" : "not ");
 170 }
 171
 172
 173 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 174                                                  union wpa_event_data *data)
 175 {
 176         if (data == NULL) {
 177                 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: No data in PMKID candidate "
 178                         "event");
 179                 return;
 180         }
 181         wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 182                 " index=%d preauth=%d",
 183                 MAC2STR(data->pmkid_candidate.bssid),
 184                 data->pmkid_candidate.index,
 185                 data->pmkid_candidate.preauth);
 186
 187         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 188                             data->pmkid_candidate.index,
 189                             data->pmkid_candidate.preauth);
 190 }
 191
 192
 193 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 194 {
 195         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 196             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 197                 return 0;
 198
 199 #ifdef IEEE8021X_EAPOL
 200         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 201             wpa_s->current_ssid &&
 202             !(wpa_s->current_ssid->eapol_flags &
 203               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 204                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 205                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 206                  * plaintext or static WEP keys). */
 207                 return 0;
 208         }
 209 #endif /* IEEE8021X_EAPOL */
 210
 211         return 1;
 212 }
 213
 214
 215 /**
 216  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 217  * @wpa_s: pointer to wpa_supplicant data
 218  * @ssid: Configuration data for the network
 219  * Returns: 0 on success, -1 on failure
 220  *
 221  * This function is called when starting authentication with a network that is
 222  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 223  */
 224 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 225                               struct wpa_ssid *ssid)
 226 {
 227 #ifdef IEEE8021X_EAPOL
 228 #ifdef PCSC_FUNCS
 229         int aka = 0, sim = 0, type;
 230
 231         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 232                 return 0;
 233
 234         if (ssid->eap.eap_methods == NULL) {
 235                 sim = 1;
 236                 aka = 1;
 237         } else {
 238                 struct eap_method_type *eap = ssid->eap.eap_methods;
 239                 while (eap->vendor != EAP_VENDOR_IETF ||
 240                        eap->method != EAP_TYPE_NONE) {
 241                         if (eap->vendor == EAP_VENDOR_IETF) {
 242                                 if (eap->method == EAP_TYPE_SIM)
 243                                         sim = 1;
 244                                 else if (eap->method == EAP_TYPE_AKA)
 245                                         aka = 1;
 246                         }
 247                         eap++;
 248                 }
 249         }
 250
 251         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 252                 sim = 0;
 253         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 254                 aka = 0;
 255
 256         if (!sim && !aka) {
 257                 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to "
 258                         "use SIM, but neither EAP-SIM nor EAP-AKA are "
 259                         "enabled");
 260                 return 0;
 261         }
 262
 263         wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to use SIM "
 264                 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 265         if (sim && aka)
 266                 type = SCARD_TRY_BOTH;
 267         else if (aka)
 268                 type = SCARD_USIM_ONLY;
 269         else
 270                 type = SCARD_GSM_SIM_ONLY;
 271
 272         wpa_s->scard = scard_init(type);
 273         if (wpa_s->scard == NULL) {
 274                 wpa_msg(wpa_s, MSG_WARNING, "Failed to initialize SIM "
 275                         "(pcsc-lite)");
 276                 return -1;
 277         }
 278         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 279         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 280 #endif /* PCSC_FUNCS */
 281 #endif /* IEEE8021X_EAPOL */
 282
 283         return 0;
 284 }
 285
 286
 287 #ifndef CONFIG_NO_SCAN_PROCESSING
 288 static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 289                                         struct wpa_ssid *ssid)
 290 {
 291         int i, privacy = 0;
 292
 293         if (ssid->mixed_cell)
 294                 return 1;
 295
 296 #ifdef CONFIG_WPS
 297         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 298                 return 1;
 299 #endif /* CONFIG_WPS */
 300
 301         for (i = 0; i < NUM_WEP_KEYS; i++) {
 302                 if (ssid->wep_key_len[i]) {
 303                         privacy = 1;
 304                         break;
 305                 }
 306         }
 307 #ifdef IEEE8021X_EAPOL
 308         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 309             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 310                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 311                 privacy = 1;
 312 #endif /* IEEE8021X_EAPOL */
 313
 314         if (wpa_key_mgmt_wpa(ssid->key_mgmt))
 315                 privacy = 1;
 316
 317         if (bss->caps & IEEE80211_CAP_PRIVACY)
 318                 return privacy;
 319         return !privacy;
 320 }
 321
 322
 323 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 324                                          struct wpa_ssid *ssid,
 325                                          struct wpa_scan_res *bss)
 326 {
 327         struct wpa_ie_data ie;
 328         int proto_match = 0;
 329         const u8 *rsn_ie, *wpa_ie;
 330         int ret;
 331         int wep_ok;
 332
 333         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 334         if (ret >= 0)
 335                 return ret;
 336
 337         /* Allow TSN if local configuration accepts WEP use without WPA/WPA2 */
 338         wep_ok = !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
 339                 (((ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 340                   ssid->wep_key_len[ssid->wep_tx_keyidx] > 0) ||
 341                  (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA));
 342
 343         rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 344         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 345                 proto_match++;
 346
 347                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 348                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - parse "
 349                                 "failed");
 350                         break;
 351                 }
 352
 353                 if (wep_ok &&
 354                     (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
 355                 {
 356                         wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on TSN "
 357                                 "in RSN IE");
 358                         return 1;
 359                 }
 360
 361                 if (!(ie.proto & ssid->proto)) {
 362                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - proto "
 363                                 "mismatch");
 364                         break;
 365                 }
 366
 367                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 368                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - PTK "
 369                                 "cipher mismatch");
 370                         break;
 371                 }
 372
 373                 if (!(ie.group_cipher & ssid->group_cipher)) {
 374                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - GTK "
 375                                 "cipher mismatch");
 376                         break;
 377                 }
 378
 379                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 380                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - key mgmt "
 381                                 "mismatch");
 382                         break;
 383                 }
 384
 385 #ifdef CONFIG_IEEE80211W
 386                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 387                     ssid->ieee80211w == MGMT_FRAME_PROTECTION_REQUIRED) {
 388                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - no mgmt "
 389                                 "frame protection");
 390                         break;
 391                 }
 392 #endif /* CONFIG_IEEE80211W */
 393
 394                 wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on RSN IE");
 395                 return 1;
 396         }
 397
 398         wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 399         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 400                 proto_match++;
 401
 402                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 403                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - parse "
 404                                 "failed");
 405                         break;
 406                 }
 407
 408                 if (wep_ok &&
 409                     (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
 410                 {
 411                         wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on TSN "
 412                                 "in WPA IE");
 413                         return 1;
 414                 }
 415
 416                 if (!(ie.proto & ssid->proto)) {
 417                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - proto "
 418                                 "mismatch");
 419                         break;
 420                 }
 421
 422                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 423                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - PTK "
 424                                 "cipher mismatch");
 425                         break;
 426                 }
 427
 428                 if (!(ie.group_cipher & ssid->group_cipher)) {
 429                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - GTK "
 430                                 "cipher mismatch");
 431                         break;
 432                 }
 433
 434                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 435                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - key mgmt "
 436                                 "mismatch");
 437                         break;
 438                 }
 439
 440                 wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on WPA IE");
 441                 return 1;
 442         }
 443
 444         if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) &&
 445             wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) {
 446                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - no WPA/RSN proto match");
 447                 return 0;
 448         }
 449
 450         if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 451                 wpa_dbg(wpa_s, MSG_DEBUG, "   allow in non-WPA/WPA2");
 452                 return 1;
 453         }
 454
 455         wpa_dbg(wpa_s, MSG_DEBUG, "   reject due to mismatch with "
 456                 "WPA/WPA2");
 457
 458         return 0;
 459 }
 460
 461
 462 static int freq_allowed(int *freqs, int freq)
 463 {
 464         int i;
 465
 466         if (freqs == NULL)
 467                 return 1;
 468
 469         for (i = 0; freqs[i]; i++)
 470                 if (freqs[i] == freq)
 471                         return 1;
 472         return 0;
 473 }
 474
 475
 476 static int ht_supported(const struct hostapd_hw_modes *mode)
 477 {
 478         if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
 479                 /*
 480                  * The driver did not indicate whether it supports HT. Assume
 481                  * it does to avoid connection issues.
 482                  */
 483                 return 1;
 484         }
 485
 486         /*
 487          * IEEE Std 802.11n-2009 20.1.1:
 488          * An HT non-AP STA shall support all EQM rates for one spatial stream.
 489          */
 490         return mode->mcs_set[0] == 0xff;
 491 }
 492
 493
 494 static int rate_match(struct wpa_supplicant *wpa_s, struct wpa_scan_res *bss)
 495 {
 496         const struct hostapd_hw_modes *mode = NULL, *modes;
 497         const u8 scan_ie[2] = { WLAN_EID_SUPP_RATES, WLAN_EID_EXT_SUPP_RATES };
 498         const u8 *rate_ie;
 499         int i, j, k;
 500
 501         if (bss->freq == 0)
 502                 return 1; /* Cannot do matching without knowing band */
 503
 504         modes = wpa_s->hw.modes;
 505         if (modes == NULL) {
 506                 /*
 507                  * The driver does not provide any additional information
 508                  * about the utilized hardware, so allow the connection attempt
 509                  * to continue.
 510                  */
 511                 return 1;
 512         }
 513
 514         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 515                 for (j = 0; j < modes[i].num_channels; j++) {
 516                         int freq = modes[i].channels[j].freq;
 517                         if (freq == bss->freq) {
 518                                 if (mode &&
 519                                     mode->mode == HOSTAPD_MODE_IEEE80211G)
 520                                         break; /* do not allow 802.11b replace
 521                                                 * 802.11g */
 522                                 mode = &modes[i];
 523                                 break;
 524                         }
 525                 }
 526         }
 527
 528         if (mode == NULL)
 529                 return 0;
 530
 531         for (i = 0; i < (int) sizeof(scan_ie); i++) {
 532                 rate_ie = wpa_scan_get_ie(bss, scan_ie[i]);
 533                 if (rate_ie == NULL)
 534                         continue;
 535
 536                 for (j = 2; j < rate_ie[1] + 2; j++) {
 537                         int flagged = !!(rate_ie[j] & 0x80);
 538                         int r = (rate_ie[j] & 0x7f) * 5;
 539
 540                         /*
 541                          * IEEE Std 802.11n-2009 7.3.2.2:
 542                          * The new BSS Membership selector value is encoded
 543                          * like a legacy basic rate, but it is not a rate and
 544                          * only indicates if the BSS members are required to
 545                          * support the mandatory features of Clause 20 [HT PHY]
 546                          * in order to join the BSS.
 547                          */
 548                         if (flagged && ((rate_ie[j] & 0x7f) ==
 549                                         BSS_MEMBERSHIP_SELECTOR_HT_PHY)) {
 550                                 if (!ht_supported(mode)) {
 551                                         wpa_dbg(wpa_s, MSG_DEBUG,
 552                                                 "   hardware does not support "
 553                                                 "HT PHY");
 554                                         return 0;
 555                                 }
 556                                 continue;
 557                         }
 558
 559                         if (!flagged)
 560                                 continue;
 561
 562                         /* check for legacy basic rates */
 563                         for (k = 0; k < mode->num_rates; k++) {
 564                                 if (mode->rates[k] == r)
 565                                         break;
 566                         }
 567                         if (k == mode->num_rates) {
 568                                 /*
 569                                  * IEEE Std 802.11-2007 7.3.2.2 demands that in
 570                                  * order to join a BSS all required rates
 571                                  * have to be supported by the hardware.
 572                                  */
 573                                 wpa_dbg(wpa_s, MSG_DEBUG, "   hardware does "
 574                                         "not support required rate %d.%d Mbps",
 575                                         r / 10, r % 10);
 576                                 return 0;
 577                         }
 578                 }
 579         }
 580
 581         return 1;
 582 }
 583
 584
 585 static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
 586                                             int i, struct wpa_scan_res *bss,
 587                                             struct wpa_ssid *group)
 588 {
 589         const u8 *ssid_;
 590         u8 wpa_ie_len, rsn_ie_len, ssid_len;
 591         int wpa;
 592         struct wpa_blacklist *e;
 593         const u8 *ie;
 594         struct wpa_ssid *ssid;
 595
 596         ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 597         ssid_ = ie ? ie + 2 : (u8 *) "";
 598         ssid_len = ie ? ie[1] : 0;
 599
 600         ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 601         wpa_ie_len = ie ? ie[1] : 0;
 602
 603         ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 604         rsn_ie_len = ie ? ie[1] : 0;
 605
 606         wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 607                 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s",
 608                 i, MAC2STR(bss->bssid), wpa_ssid_txt(ssid_, ssid_len),
 609                 wpa_ie_len, rsn_ie_len, bss->caps, bss->level,
 610                 wpa_scan_get_vendor_ie(bss, WPS_IE_VENDOR_TYPE) ? " wps" : "");
 611
 612         e = wpa_blacklist_get(wpa_s, bss->bssid);
 613         if (e) {
 614                 int limit = 1;
 615                 if (wpa_supplicant_enabled_networks(wpa_s->conf) == 1) {
 616                         /*
 617                          * When only a single network is enabled, we can
 618                          * trigger blacklisting on the first failure. This
 619                          * should not be done with multiple enabled networks to
 620                          * avoid getting forced to move into a worse ESS on
 621                          * single error if there are no other BSSes of the
 622                          * current ESS.
 623                          */
 624                         limit = 0;
 625                 }
 626                 if (e->count > limit) {
 627                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - blacklisted "
 628                                 "(count=%d limit=%d)", e->count, limit);
 629                         return NULL;
 630                 }
 631         }
 632
 633         if (ssid_len == 0) {
 634                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - SSID not known");
 635                 return NULL;
 636         }
 637
 638         wpa = wpa_ie_len > 0 || rsn_ie_len > 0;
 639
 640         for (ssid = group; ssid; ssid = ssid->pnext) {
 641                 int check_ssid = wpa ? 1 : (ssid->ssid_len != 0);
 642
 643                 if (ssid->disabled) {
 644                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - disabled");
 645                         continue;
 646                 }
 647
 648 #ifdef CONFIG_WPS
 649                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && e && e->count > 0) {
 650                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - blacklisted "
 651                                 "(WPS)");
 652                         continue;
 653                 }
 654
 655                 if (wpa && ssid->ssid_len == 0 &&
 656                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 657                         check_ssid = 0;
 658
 659                 if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 660                         /* Only allow wildcard SSID match if an AP
 661                          * advertises active WPS operation that matches
 662                          * with our mode. */
 663                         check_ssid = 1;
 664                         if (ssid->ssid_len == 0 &&
 665                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 666                                 check_ssid = 0;
 667                 }
 668 #endif /* CONFIG_WPS */
 669
 670                 if (ssid->bssid_set && ssid->ssid_len == 0 &&
 671                     os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0)
 672                         check_ssid = 0;
 673
 674                 if (check_ssid &&
 675                     (ssid_len != ssid->ssid_len ||
 676                      os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 677                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - SSID mismatch");
 678                         continue;
 679                 }
 680
 681                 if (ssid->bssid_set &&
 682                     os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
 683                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - BSSID mismatch");
 684                         continue;
 685                 }
 686
 687                 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 688                         continue;
 689
 690                 if (!wpa &&
 691                     !(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 692                     !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 693                     !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) {
 694                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - non-WPA network "
 695                                 "not allowed");
 696                         continue;
 697                 }
 698
 699                 if (!wpa_supplicant_match_privacy(bss, ssid)) {
 700                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - privacy "
 701                                 "mismatch");
 702                         continue;
 703                 }
 704
 705                 if (bss->caps & IEEE80211_CAP_IBSS) {
 706                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - IBSS (adhoc) "
 707                                 "network");
 708                         continue;
 709                 }
 710
 711                 if (!freq_allowed(ssid->freq_list, bss->freq)) {
 712                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - frequency not "
 713                                 "allowed");
 714                         continue;
 715                 }
 716
 717                 if (!rate_match(wpa_s, bss)) {
 718                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - rate sets do "
 719                                 "not match");
 720                         continue;
 721                 }
 722
 723 #ifdef CONFIG_P2P
 724                 /*
 725                  * TODO: skip the AP if its P2P IE has Group Formation
 726                  * bit set in the P2P Group Capability Bitmap and we
 727                  * are not in Group Formation with that device.
 728                  */
 729 #endif /* CONFIG_P2P */
 730
 731                 /* Matching configuration found */
 732                 return ssid;
 733         }
 734
 735         /* No matching configuration found */
 736         return NULL;
 737 }
 738
 739
 740 static struct wpa_bss *
 741 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
 742                           struct wpa_scan_results *scan_res,
 743                           struct wpa_ssid *group,
 744                           struct wpa_ssid **selected_ssid)
 745 {
 746         size_t i;
 747
 748         wpa_dbg(wpa_s, MSG_DEBUG, "Selecting BSS from priority group %d",
 749                 group->priority);
 750
 751         for (i = 0; i < scan_res->num; i++) {
 752                 struct wpa_scan_res *bss = scan_res->res[i];
 753                 const u8 *ie, *ssid;
 754                 u8 ssid_len;
 755
 756                 *selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group);
 757                 if (!*selected_ssid)
 758                         continue;
 759
 760                 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 761                 ssid = ie ? ie + 2 : (u8 *) "";
 762                 ssid_len = ie ? ie[1] : 0;
 763
 764                 wpa_dbg(wpa_s, MSG_DEBUG, "   selected BSS " MACSTR
 765                         " ssid='%s'",
 766                         MAC2STR(bss->bssid), wpa_ssid_txt(ssid, ssid_len));
 767                 return wpa_bss_get(wpa_s, bss->bssid, ssid, ssid_len);
 768         }
 769
 770         return NULL;
 771 }
 772
 773
 774 static struct wpa_bss *
 775 wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 776                             struct wpa_scan_results *scan_res,
 777                             struct wpa_ssid **selected_ssid)
 778 {
 779         struct wpa_bss *selected = NULL;
 780         int prio;
 781
 782         while (selected == NULL) {
 783                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 784                         selected = wpa_supplicant_select_bss(
 785                                 wpa_s, scan_res, wpa_s->conf->pssid[prio],
 786                                 selected_ssid);
 787                         if (selected)
 788                                 break;
 789                 }
 790
 791                 if (selected == NULL && wpa_s->blacklist) {
 792                         wpa_dbg(wpa_s, MSG_DEBUG, "No APs found - clear "
 793                                 "blacklist and try again");
 794                         wpa_blacklist_clear(wpa_s);
 795                         wpa_s->blacklist_cleared++;
 796                 } else if (selected == NULL)
 797                         break;
 798         }
 799
 800         return selected;
 801 }
 802
 803
 804 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 805                                         int timeout_sec, int timeout_usec)
 806 {
 807         if (!wpa_supplicant_enabled_networks(wpa_s->conf)) {
 808                 /*
 809                  * No networks are enabled; short-circuit request so
 810                  * we don't wait timeout seconds before transitioning
 811                  * to INACTIVE state.
 812                  */
 813                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
 814                 return;
 815         }
 816         wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
 817 }
 818
 819
 820 int wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 821                            struct wpa_bss *selected,
 822                            struct wpa_ssid *ssid)
 823 {
 824         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 825                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 826                         "PBC session overlap");
 827 #ifdef CONFIG_P2P
 828                 if (wpas_p2p_notif_pbc_overlap(wpa_s) == 1)
 829                         return -1;
 830 #endif /* CONFIG_P2P */
 831
 832 #ifdef CONFIG_WPS
 833                 wpas_wps_cancel(wpa_s);
 834 #endif /* CONFIG_WPS */
 835                 return -1;
 836         }
 837
 838         /*
 839          * Do not trigger new association unless the BSSID has changed or if
 840          * reassociation is requested. If we are in process of associating with
 841          * the selected BSSID, do not trigger new attempt.
 842          */
 843         if (wpa_s->reassociate ||
 844             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 845              ((wpa_s->wpa_state != WPA_ASSOCIATING &&
 846                wpa_s->wpa_state != WPA_AUTHENTICATING) ||
 847               os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
 848               0))) {
 849                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 850                         wpa_supplicant_req_new_scan(wpa_s, 10, 0);
 851                         return 0;
 852                 }
 853                 wpa_msg(wpa_s, MSG_DEBUG, "Request association: "
 854                         "reassociate: %d  selected: "MACSTR "  bssid: " MACSTR
 855                         "  pending: " MACSTR "  wpa_state: %s",
 856                         wpa_s->reassociate, MAC2STR(selected->bssid),
 857                         MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid),
 858                         wpa_supplicant_state_txt(wpa_s->wpa_state));
 859                 wpa_supplicant_associate(wpa_s, selected, ssid);
 860         } else {
 861                 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated with the "
 862                         "selected AP");
 863         }
 864
 865         return 0;
 866 }
 867
 868
 869 static struct wpa_ssid *
 870 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
 871 {
 872         int prio;
 873         struct wpa_ssid *ssid;
 874
 875         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 876                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
 877                 {
 878                         if (ssid->disabled)
 879                                 continue;
 880                         if (ssid->mode == IEEE80211_MODE_IBSS ||
 881                             ssid->mode == IEEE80211_MODE_AP)
 882                                 return ssid;
 883                 }
 884         }
 885         return NULL;
 886 }
 887
 888
 889 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
 890  * on BSS added and BSS changed events */
 891 static void wpa_supplicant_rsn_preauth_scan_results(
 892         struct wpa_supplicant *wpa_s)
 893 {
 894         struct wpa_bss *bss;
 895
 896         if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
 897                 return;
 898
 899         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
 900                 const u8 *ssid, *rsn;
 901
 902                 ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID);
 903                 if (ssid == NULL)
 904                         continue;
 905
 906                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 907                 if (rsn == NULL)
 908                         continue;
 909
 910                 rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn);
 911         }
 912
 913 }
 914
 915
 916 static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
 917                                        struct wpa_bss *selected,
 918                                        struct wpa_ssid *ssid,
 919                                        struct wpa_scan_results *scan_res)
 920 {
 921         size_t i;
 922         struct wpa_scan_res *current_bss = NULL;
 923         int min_diff;
 924
 925         if (wpa_s->reassociate)
 926                 return 1; /* explicit request to reassociate */
 927         if (wpa_s->wpa_state < WPA_ASSOCIATED)
 928                 return 1; /* we are not associated; continue */
 929         if (wpa_s->current_ssid == NULL)
 930                 return 1; /* unknown current SSID */
 931         if (wpa_s->current_ssid != ssid)
 932                 return 1; /* different network block */
 933
 934         if (wpas_driver_bss_selection(wpa_s))
 935                 return 0; /* Driver-based roaming */
 936
 937         for (i = 0; i < scan_res->num; i++) {
 938                 struct wpa_scan_res *res = scan_res->res[i];
 939                 const u8 *ie;
 940                 if (os_memcmp(res->bssid, wpa_s->bssid, ETH_ALEN) != 0)
 941                         continue;
 942
 943                 ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 944                 if (ie == NULL)
 945                         continue;
 946                 if (ie[1] != wpa_s->current_ssid->ssid_len ||
 947                     os_memcmp(ie + 2, wpa_s->current_ssid->ssid, ie[1]) != 0)
 948                         continue;
 949                 current_bss = res;
 950                 break;
 951         }
 952
 953         if (!current_bss)
 954                 return 1; /* current BSS not seen in scan results */
 955
 956         wpa_dbg(wpa_s, MSG_DEBUG, "Considering within-ESS reassociation");
 957         wpa_dbg(wpa_s, MSG_DEBUG, "Current BSS: " MACSTR " level=%d",
 958                 MAC2STR(current_bss->bssid), current_bss->level);
 959         wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR " level=%d",
 960                 MAC2STR(selected->bssid), selected->level);
 961
 962         if (wpa_s->current_ssid->bssid_set &&
 963             os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
 964             0) {
 965                 wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS "
 966                         "has preferred BSSID");
 967                 return 1;
 968         }
 969
 970         min_diff = 2;
 971         if (current_bss->level < 0) {
 972                 if (current_bss->level < -85)
 973                         min_diff = 1;
 974                 else if (current_bss->level < -80)
 975                         min_diff = 2;
 976                 else if (current_bss->level < -75)
 977                         min_diff = 3;
 978                 else if (current_bss->level < -70)
 979                         min_diff = 4;
 980                 else
 981                         min_diff = 5;
 982         }
 983         if (abs(current_bss->level - selected->level) < min_diff) {
 984                 wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - too small difference "
 985                         "in signal level");
 986                 return 0;
 987         }
 988
 989         return 1;
 990 }
 991
 992 /* Return < 0 if no scan results could be fetched. */
 993 static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
 994                                               union wpa_event_data *data)
 995 {
 996         struct wpa_bss *selected;
 997         struct wpa_ssid *ssid = NULL;
 998         struct wpa_scan_results *scan_res;
 999         int ap = 0;
1000
1001 #ifdef CONFIG_AP
1002         if (wpa_s->ap_iface)
1003                 ap = 1;
1004 #endif /* CONFIG_AP */
1005
1006         wpa_supplicant_notify_scanning(wpa_s, 0);
1007
1008 #ifdef CONFIG_P2P
1009         if (wpa_s->p2p_cb_on_scan_complete && !wpa_s->global->p2p_disabled &&
1010             wpa_s->global->p2p != NULL) {
1011                 wpa_s->p2p_cb_on_scan_complete = 0;
1012                 if (p2p_other_scan_completed(wpa_s->global->p2p) == 1) {
1013                         wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Pending P2P operation "
1014                                 "stopped scan processing");
1015                         return -1;
1016                 }
1017         }
1018 #endif /* CONFIG_P2P */
1019
1020         scan_res = wpa_supplicant_get_scan_results(wpa_s,
1021                                                    data ? &data->scan_info :
1022                                                    NULL, 1);
1023         if (scan_res == NULL) {
1024                 if (wpa_s->conf->ap_scan == 2 || ap)
1025                         return -1;
1026                 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results - try "
1027                         "scanning again");
1028                 wpa_supplicant_req_new_scan(wpa_s, 1, 0);
1029                 return -1;
1030         }
1031
1032 #ifndef CONFIG_NO_RANDOM_POOL
1033         size_t i, num;
1034         num = scan_res->num;
1035         if (num > 10)
1036                 num = 10;
1037         for (i = 0; i < num; i++) {
1038                 u8 buf[5];
1039                 struct wpa_scan_res *res = scan_res->res[i];
1040                 buf[0] = res->bssid[5];
1041                 buf[1] = res->qual & 0xff;
1042                 buf[2] = res->noise & 0xff;
1043                 buf[3] = res->level & 0xff;
1044                 buf[4] = res->tsf & 0xff;
1045                 random_add_randomness(buf, sizeof(buf));
1046         }
1047 #endif /* CONFIG_NO_RANDOM_POOL */
1048
1049         if (wpa_s->scan_res_handler) {
1050                 void (*scan_res_handler)(struct wpa_supplicant *wpa_s,
1051                                          struct wpa_scan_results *scan_res);
1052
1053                 scan_res_handler = wpa_s->scan_res_handler;
1054                 wpa_s->scan_res_handler = NULL;
1055                 scan_res_handler(wpa_s, scan_res);
1056
1057                 wpa_scan_results_free(scan_res);
1058                 return 0;
1059         }
1060
1061         if (ap) {
1062                 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore scan results in AP mode");
1063 #ifdef CONFIG_AP
1064                 if (wpa_s->ap_iface->scan_cb)
1065                         wpa_s->ap_iface->scan_cb(wpa_s->ap_iface);
1066 #endif /* CONFIG_AP */
1067                 wpa_scan_results_free(scan_res);
1068                 return 0;
1069         }
1070
1071         wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available");
1072         wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
1073         wpas_notify_scan_results(wpa_s);
1074
1075         wpas_notify_scan_done(wpa_s, 1);
1076
1077         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s))) {
1078                 wpa_scan_results_free(scan_res);
1079                 return 0;
1080         }
1081
1082         if (wpa_s->disconnected) {
1083                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1084                 wpa_scan_results_free(scan_res);
1085                 return 0;
1086         }
1087
1088         if (!wpas_driver_bss_selection(wpa_s) &&
1089             bgscan_notify_scan(wpa_s, scan_res) == 1) {
1090                 wpa_scan_results_free(scan_res);
1091                 return 0;
1092         }
1093
1094         selected = wpa_supplicant_pick_network(wpa_s, scan_res, &ssid);
1095
1096         if (selected) {
1097                 int skip;
1098                 skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid,
1099                                                     scan_res);
1100                 wpa_scan_results_free(scan_res);
1101                 if (skip) {
1102                         wpa_supplicant_rsn_preauth_scan_results(wpa_s);
1103                         return 0;
1104                 }
1105
1106                 if (wpa_supplicant_connect(wpa_s, selected, ssid) < 0) {
1107                         wpa_dbg(wpa_s, MSG_DEBUG, "Connect failed");
1108                         return -1;
1109                 }
1110                 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
1111         } else {
1112                 wpa_scan_results_free(scan_res);
1113                 wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found");
1114                 ssid = wpa_supplicant_pick_new_network(wpa_s);
1115                 if (ssid) {
1116                         wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network");
1117                         wpa_supplicant_associate(wpa_s, NULL, ssid);
1118                         wpa_supplicant_rsn_preauth_scan_results(wpa_s);
1119                 } else {
1120                         int timeout_sec = wpa_s->scan_interval;
1121                         int timeout_usec = 0;
1122 #ifdef CONFIG_P2P
1123                         if (wpa_s->p2p_in_provisioning) {
1124                                 /*
1125                                  * Use shorter wait during P2P Provisioning
1126                                  * state to speed up group formation.
1127                                  */
1128                                 timeout_sec = 0;
1129                                 timeout_usec = 250000;
1130                                 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
1131                                                             timeout_usec);
1132                                 return 0;
1133                         }
1134 #endif /* CONFIG_P2P */
1135                         if (wpa_supplicant_req_sched_scan(wpa_s))
1136                                 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
1137                                                             timeout_usec);
1138                 }
1139         }
1140         return 0;
1141 }
1142
1143
1144 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
1145                                               union wpa_event_data *data)
1146 {
1147         const char *rn, *rn2;
1148         struct wpa_supplicant *ifs;
1149
1150         if (_wpa_supplicant_event_scan_results(wpa_s, data) < 0) {
1151                 /*
1152                  * If no scan results could be fetched, then no need to
1153                  * notify those interfaces that did not actually request
1154                  * this scan.
1155                  */
1156                 return;
1157         }
1158
1159         /*
1160          * Check other interfaces to see if they have the same radio-name. If
1161          * so, they get updated with this same scan info.
1162          */
1163         if (!wpa_s->driver->get_radio_name)
1164                 return;
1165
1166         rn = wpa_s->driver->get_radio_name(wpa_s->drv_priv);
1167         if (rn == NULL || rn[0] == '\0')
1168                 return;
1169
1170         wpa_dbg(wpa_s, MSG_DEBUG, "Checking for other virtual interfaces "
1171                 "sharing same radio (%s) in event_scan_results", rn);
1172
1173         for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) {
1174                 if (ifs == wpa_s || !ifs->driver->get_radio_name)
1175                         continue;
1176
1177                 rn2 = ifs->driver->get_radio_name(ifs->drv_priv);
1178                 if (rn2 && os_strcmp(rn, rn2) == 0) {
1179                         wpa_printf(MSG_DEBUG, "%s: Updating scan results from "
1180                                    "sibling", ifs->ifname);
1181                         _wpa_supplicant_event_scan_results(ifs, data);
1182                 }
1183         }
1184 }
1185
1186 #endif /* CONFIG_NO_SCAN_PROCESSING */
1187
1188
1189 static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
1190                                           union wpa_event_data *data)
1191 {
1192         int l, len, found = 0, wpa_found, rsn_found;
1193         const u8 *p;
1194
1195         wpa_dbg(wpa_s, MSG_DEBUG, "Association info event");
1196         if (data->assoc_info.req_ies)
1197                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
1198                             data->assoc_info.req_ies_len);
1199         if (data->assoc_info.resp_ies) {
1200                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
1201                             data->assoc_info.resp_ies_len);
1202 #ifdef CONFIG_TDLS
1203                 wpa_tdls_assoc_resp_ies(wpa_s->wpa, data->assoc_info.resp_ies,
1204                                         data->assoc_info.resp_ies_len);
1205 #endif /* CONFIG_TDLS */
1206         }
1207         if (data->assoc_info.beacon_ies)
1208                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
1209                             data->assoc_info.beacon_ies,
1210                             data->assoc_info.beacon_ies_len);
1211         if (data->assoc_info.freq)
1212                 wpa_dbg(wpa_s, MSG_DEBUG, "freq=%u MHz",
1213                         data->assoc_info.freq);
1214
1215         p = data->assoc_info.req_ies;
1216         l = data->assoc_info.req_ies_len;
1217
1218         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
1219         while (p && l >= 2) {
1220                 len = p[1] + 2;
1221                 if (len > l) {
1222                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1223                                     p, l);
1224                         break;
1225                 }
1226                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1227                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
1228                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
1229                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
1230                                 break;
1231                         found = 1;
1232                         wpa_find_assoc_pmkid(wpa_s);
1233                         break;
1234                 }
1235                 l -= len;
1236                 p += len;
1237         }
1238         if (!found && data->assoc_info.req_ies)
1239                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1240
1241 #ifdef CONFIG_IEEE80211R
1242 #ifdef CONFIG_SME
1243         if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) {
1244                 u8 bssid[ETH_ALEN];
1245                 if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
1246                     wpa_ft_validate_reassoc_resp(wpa_s->wpa,
1247                                                  data->assoc_info.resp_ies,
1248                                                  data->assoc_info.resp_ies_len,
1249                                                  bssid) < 0) {
1250                         wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
1251                                 "Reassociation Response failed");
1252                         wpa_supplicant_deauthenticate(
1253                                 wpa_s, WLAN_REASON_INVALID_IE);
1254                         return -1;
1255                 }
1256         }
1257
1258         p = data->assoc_info.resp_ies;
1259         l = data->assoc_info.resp_ies_len;
1260
1261 #ifdef CONFIG_WPS_STRICT
1262         if (p && wpa_s->current_ssid &&
1263             wpa_s->current_ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1264                 struct wpabuf *wps;
1265                 wps = ieee802_11_vendor_ie_concat(p, l, WPS_IE_VENDOR_TYPE);
1266                 if (wps == NULL) {
1267                         wpa_msg(wpa_s, MSG_INFO, "WPS-STRICT: AP did not "
1268                                 "include WPS IE in (Re)Association Response");
1269                         return -1;
1270                 }
1271
1272                 if (wps_validate_assoc_resp(wps) < 0) {
1273                         wpabuf_free(wps);
1274                         wpa_supplicant_deauthenticate(
1275                                 wpa_s, WLAN_REASON_INVALID_IE);
1276                         return -1;
1277                 }
1278                 wpabuf_free(wps);
1279         }
1280 #endif /* CONFIG_WPS_STRICT */
1281
1282         /* Go through the IEs and make a copy of the MDIE, if present. */
1283         while (p && l >= 2) {
1284                 len = p[1] + 2;
1285                 if (len > l) {
1286                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1287                                     p, l);
1288                         break;
1289                 }
1290                 if (p[0] == WLAN_EID_MOBILITY_DOMAIN &&
1291                     p[1] >= MOBILITY_DOMAIN_ID_LEN) {
1292                         wpa_s->sme.ft_used = 1;
1293                         os_memcpy(wpa_s->sme.mobility_domain, p + 2,
1294                                   MOBILITY_DOMAIN_ID_LEN);
1295                         break;
1296                 }
1297                 l -= len;
1298                 p += len;
1299         }
1300 #endif /* CONFIG_SME */
1301
1302         wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies,
1303                              data->assoc_info.resp_ies_len);
1304 #endif /* CONFIG_IEEE80211R */
1305
1306         /* WPA/RSN IE from Beacon/ProbeResp */
1307         p = data->assoc_info.beacon_ies;
1308         l = data->assoc_info.beacon_ies_len;
1309
1310         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
1311          */
1312         wpa_found = rsn_found = 0;
1313         while (p && l >= 2) {
1314                 len = p[1] + 2;
1315                 if (len > l) {
1316                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
1317                                     p, l);
1318                         break;
1319                 }
1320                 if (!wpa_found &&
1321                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1322                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
1323                         wpa_found = 1;
1324                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
1325                 }
1326
1327                 if (!rsn_found &&
1328                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
1329                         rsn_found = 1;
1330                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
1331                 }
1332
1333                 l -= len;
1334                 p += len;
1335         }
1336
1337         if (!wpa_found && data->assoc_info.beacon_ies)
1338                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
1339         if (!rsn_found && data->assoc_info.beacon_ies)
1340                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
1341         if (wpa_found || rsn_found)
1342                 wpa_s->ap_ies_from_associnfo = 1;
1343
1344         if (wpa_s->assoc_freq && data->assoc_info.freq &&
1345             wpa_s->assoc_freq != data->assoc_info.freq) {
1346                 wpa_printf(MSG_DEBUG, "Operating frequency changed from "
1347                            "%u to %u MHz",
1348                            wpa_s->assoc_freq, data->assoc_info.freq);
1349                 wpa_supplicant_update_scan_results(wpa_s);
1350         }
1351
1352         wpa_s->assoc_freq = data->assoc_info.freq;
1353
1354         return 0;
1355 }
1356
1357
1358 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
1359                                        union wpa_event_data *data)
1360 {
1361         u8 bssid[ETH_ALEN];
1362         int ft_completed;
1363         int bssid_changed;
1364         struct wpa_driver_capa capa;
1365
1366 #ifdef CONFIG_AP
1367         if (wpa_s->ap_iface) {
1368                 hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
1369                                     data->assoc_info.addr,
1370                                     data->assoc_info.req_ies,
1371                                     data->assoc_info.req_ies_len,
1372                                     data->assoc_info.reassoc);
1373                 return;
1374         }
1375 #endif /* CONFIG_AP */
1376
1377         ft_completed = wpa_ft_is_completed(wpa_s->wpa);
1378         if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0)
1379                 return;
1380
1381         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
1382         if (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
1383             os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) {
1384                 wpa_dbg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1385                         MACSTR, MAC2STR(bssid));
1386                 random_add_randomness(bssid, ETH_ALEN);
1387                 bssid_changed = os_memcmp(wpa_s->bssid, bssid, ETH_ALEN);
1388                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1389                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1390                 if (bssid_changed)
1391                         wpas_notify_bssid_changed(wpa_s);
1392
1393                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1394                         wpa_clear_keys(wpa_s, bssid);
1395                 }
1396                 if (wpa_supplicant_select_config(wpa_s) < 0) {
1397                         wpa_supplicant_disassociate(
1398                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1399                         return;
1400                 }
1401                 if (wpa_s->current_ssid) {
1402                         struct wpa_bss *bss = NULL;
1403                         struct wpa_ssid *ssid = wpa_s->current_ssid;
1404                         if (ssid->ssid_len > 0)
1405                                 bss = wpa_bss_get(wpa_s, bssid,
1406                                                   ssid->ssid, ssid->ssid_len);
1407                         if (!bss)
1408                                 bss = wpa_bss_get_bssid(wpa_s, bssid);
1409                         if (bss)
1410                                 wpa_s->current_bss = bss;
1411                 }
1412         }
1413
1414 #ifdef CONFIG_SME
1415         os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1416         wpa_s->sme.prev_bssid_set = 1;
1417 #endif /* CONFIG_SME */
1418
1419         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1420         if (wpa_s->current_ssid) {
1421                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1422                  * initialized before association, but for other modes,
1423                  * initialize PC/SC here, if the current configuration needs
1424                  * smartcard or SIM/USIM. */
1425                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1426         }
1427         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1428         if (wpa_s->l2)
1429                 l2_packet_notify_auth_start(wpa_s->l2);
1430
1431         /*
1432          * Set portEnabled first to FALSE in order to get EAP state machine out
1433          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1434          * state machine may transit to AUTHENTICATING state based on obsolete
1435          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1436          * AUTHENTICATED without ever giving chance to EAP state machine to
1437          * reset the state.
1438          */
1439         if (!ft_completed) {
1440                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1441                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1442         }
1443         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1444                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1445         /* 802.1X::portControl = Auto */
1446         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1447         wpa_s->eapol_received = 0;
1448         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1449             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1450             (wpa_s->current_ssid &&
1451              wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1452                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1453                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1454         } else if (!ft_completed) {
1455                 /* Timeout for receiving the first EAPOL packet */
1456                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1457         }
1458         wpa_supplicant_cancel_scan(wpa_s);
1459
1460         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1461             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1462                 /*
1463                  * We are done; the driver will take care of RSN 4-way
1464                  * handshake.
1465                  */
1466                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1467                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1468                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1469                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1470         } else if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1471                    wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1472                 /*
1473                  * The driver will take care of RSN 4-way handshake, so we need
1474                  * to allow EAPOL supplicant to complete its work without
1475                  * waiting for WPA supplicant.
1476                  */
1477                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1478         } else if (ft_completed) {
1479                 /*
1480                  * FT protocol completed - make sure EAPOL state machine ends
1481                  * up in authenticated.
1482                  */
1483                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1484                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1485                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1486                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1487         }
1488
1489         if (wpa_s->pending_eapol_rx) {
1490                 struct os_time now, age;
1491                 os_get_time(&now);
1492                 os_time_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1493                 if (age.sec == 0 && age.usec < 100000 &&
1494                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1495                     0) {
1496                         wpa_dbg(wpa_s, MSG_DEBUG, "Process pending EAPOL "
1497                                 "frame that was received just before "
1498                                 "association notification");
1499                         wpa_supplicant_rx_eapol(
1500                                 wpa_s, wpa_s->pending_eapol_rx_src,
1501                                 wpabuf_head(wpa_s->pending_eapol_rx),
1502                                 wpabuf_len(wpa_s->pending_eapol_rx));
1503                 }
1504                 wpabuf_free(wpa_s->pending_eapol_rx);
1505                 wpa_s->pending_eapol_rx = NULL;
1506         }
1507
1508         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1509              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
1510             wpa_s->current_ssid && wpa_drv_get_capa(wpa_s, &capa) == 0 &&
1511             capa.flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE) {
1512                 /* Set static WEP keys again */
1513                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
1514         }
1515
1516 #ifdef CONFIG_IBSS_RSN
1517         if (wpa_s->current_ssid &&
1518             wpa_s->current_ssid->mode == WPAS_MODE_IBSS &&
1519             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
1520             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE &&
1521             wpa_s->ibss_rsn == NULL) {
1522                 wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
1523                 if (!wpa_s->ibss_rsn) {
1524                         wpa_msg(wpa_s, MSG_INFO, "Failed to init IBSS RSN");
1525                         wpa_supplicant_deauthenticate(
1526                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1527                         return;
1528                 }
1529
1530                 ibss_rsn_set_psk(wpa_s->ibss_rsn, wpa_s->current_ssid->psk);
1531         }
1532 #endif /* CONFIG_IBSS_RSN */
1533 }
1534
1535
1536 static int disconnect_reason_recoverable(u16 reason_code)
1537 {
1538         return reason_code == WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY ||
1539                 reason_code == WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA ||
1540                 reason_code == WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA;
1541 }
1542
1543
1544 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
1545                                           u16 reason_code)
1546 {
1547         const u8 *bssid;
1548         int authenticating;
1549         u8 prev_pending_bssid[ETH_ALEN];
1550         struct wpa_bss *fast_reconnect = NULL;
1551         struct wpa_ssid *fast_reconnect_ssid = NULL;
1552
1553         authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
1554         os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
1555
1556         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
1557                 /*
1558                  * At least Host AP driver and a Prism3 card seemed to be
1559                  * generating streams of disconnected events when configuring
1560                  * IBSS for WPA-None. Ignore them for now.
1561                  */
1562                 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - ignore in "
1563                         "IBSS/WPA-None mode");
1564                 return;
1565         }
1566
1567         if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
1568             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1569                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
1570                         "pre-shared key may be incorrect");
1571         }
1572         if (!wpa_s->auto_reconnect_disabled ||
1573             wpa_s->key_mgmt == WPA_KEY_MGMT_WPS) {
1574                 wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect enabled: try to "
1575                         "reconnect (wps=%d wpa_state=%d)",
1576                         wpa_s->key_mgmt == WPA_KEY_MGMT_WPS,
1577                         wpa_s->wpa_state);
1578                 if (wpa_s->wpa_state == WPA_COMPLETED &&
1579                     wpa_s->current_ssid &&
1580                     wpa_s->current_ssid->mode == WPAS_MODE_INFRA &&
1581                     disconnect_reason_recoverable(reason_code)) {
1582                         /*
1583                          * It looks like the AP has dropped association with
1584                          * us, but could allow us to get back in. Try to
1585                          * reconnect to the same BSS without full scan to save
1586                          * time for some common cases.
1587                          */
1588                         fast_reconnect = wpa_s->current_bss;
1589                         fast_reconnect_ssid = wpa_s->current_ssid;
1590                 } else if (wpa_s->wpa_state >= WPA_ASSOCIATING)
1591                         wpa_supplicant_req_scan(wpa_s, 0, 100000);
1592                 else
1593                         wpa_dbg(wpa_s, MSG_DEBUG, "Do not request new "
1594                                 "immediate scan");
1595         } else {
1596                 wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect disabled: do not "
1597                         "try to re-connect");
1598                 wpa_s->reassociate = 0;
1599                 wpa_s->disconnected = 1;
1600         }
1601         bssid = wpa_s->bssid;
1602         if (is_zero_ether_addr(bssid))
1603                 bssid = wpa_s->pending_bssid;
1604         if (wpa_s->wpa_state >= WPA_AUTHENTICATING)
1605                 wpas_connection_failed(wpa_s, bssid);
1606         wpa_sm_notify_disassoc(wpa_s->wpa);
1607         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
1608                 " reason=%d",
1609                 MAC2STR(bssid), reason_code);
1610         if (wpa_supplicant_dynamic_keys(wpa_s)) {
1611                 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - remove keys");
1612                 wpa_s->keys_cleared = 0;
1613                 wpa_clear_keys(wpa_s, wpa_s->bssid);
1614         }
1615         wpa_supplicant_mark_disassoc(wpa_s);
1616
1617         if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1618                 sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid);
1619
1620         if (fast_reconnect) {
1621                 wpa_dbg(wpa_s, MSG_DEBUG, "Try to reconnect to the same BSS");
1622                 if (wpa_supplicant_connect(wpa_s, fast_reconnect,
1623                                            fast_reconnect_ssid) < 0) {
1624                         /* Recover through full scan */
1625                         wpa_supplicant_req_scan(wpa_s, 0, 100000);
1626                 }
1627         }
1628 }
1629
1630
1631 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1632 void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx, void *sock_ctx)
1633 {
1634         struct wpa_supplicant *wpa_s = eloop_ctx;
1635
1636         if (!wpa_s->pending_mic_error_report)
1637                 return;
1638
1639         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Sending pending MIC error report");
1640         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
1641         wpa_s->pending_mic_error_report = 0;
1642 }
1643 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1644
1645
1646 static void
1647 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
1648                                          union wpa_event_data *data)
1649 {
1650         int pairwise;
1651         struct os_time t;
1652
1653         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
1654         pairwise = (data && data->michael_mic_failure.unicast);
1655         os_get_time(&t);
1656         if ((wpa_s->last_michael_mic_error &&
1657              t.sec - wpa_s->last_michael_mic_error <= 60) ||
1658             wpa_s->pending_mic_error_report) {
1659                 if (wpa_s->pending_mic_error_report) {
1660                         /*
1661                          * Send the pending MIC error report immediately since
1662                          * we are going to start countermeasures and AP better
1663                          * do the same.
1664                          */
1665                         wpa_sm_key_request(wpa_s->wpa, 1,
1666                                            wpa_s->pending_mic_error_pairwise);
1667                 }
1668
1669                 /* Send the new MIC error report immediately since we are going
1670                  * to start countermeasures and AP better do the same.
1671                  */
1672                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1673
1674                 /* initialize countermeasures */
1675                 wpa_s->countermeasures = 1;
1676                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
1677
1678                 /*
1679                  * Need to wait for completion of request frame. We do not get
1680                  * any callback for the message completion, so just wait a
1681                  * short while and hope for the best. */
1682                 os_sleep(0, 10000);
1683
1684                 wpa_drv_set_countermeasures(wpa_s, 1);
1685                 wpa_supplicant_deauthenticate(wpa_s,
1686                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
1687                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
1688                                      wpa_s, NULL);
1689                 eloop_register_timeout(60, 0,
1690                                        wpa_supplicant_stop_countermeasures,
1691                                        wpa_s, NULL);
1692                 /* TODO: mark the AP rejected for 60 second. STA is
1693                  * allowed to associate with another AP.. */
1694         } else {
1695 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
1696                 if (wpa_s->mic_errors_seen) {
1697                         /*
1698                          * Reduce the effectiveness of Michael MIC error
1699                          * reports as a means for attacking against TKIP if
1700                          * more than one MIC failure is noticed with the same
1701                          * PTK. We delay the transmission of the reports by a
1702                          * random time between 0 and 60 seconds in order to
1703                          * force the attacker wait 60 seconds before getting
1704                          * the information on whether a frame resulted in a MIC
1705                          * failure.
1706                          */
1707                         u8 rval[4];
1708                         int sec;
1709
1710                         if (os_get_random(rval, sizeof(rval)) < 0)
1711                                 sec = os_random() % 60;
1712                         else
1713                                 sec = WPA_GET_BE32(rval) % 60;
1714                         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Delay MIC error "
1715                                 "report %d seconds", sec);
1716                         wpa_s->pending_mic_error_report = 1;
1717                         wpa_s->pending_mic_error_pairwise = pairwise;
1718                         eloop_cancel_timeout(
1719                                 wpa_supplicant_delayed_mic_error_report,
1720                                 wpa_s, NULL);
1721                         eloop_register_timeout(
1722                                 sec, os_random() % 1000000,
1723                                 wpa_supplicant_delayed_mic_error_report,
1724                                 wpa_s, NULL);
1725                 } else {
1726                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1727                 }
1728 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1729                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
1730 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
1731         }
1732         wpa_s->last_michael_mic_error = t.sec;
1733         wpa_s->mic_errors_seen++;
1734 }
1735
1736
1737 #ifdef CONFIG_TERMINATE_ONLASTIF
1738 static int any_interfaces(struct wpa_supplicant *head)
1739 {
1740         struct wpa_supplicant *wpa_s;
1741
1742         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
1743                 if (!wpa_s->interface_removed)
1744                         return 1;
1745         return 0;
1746 }
1747 #endif /* CONFIG_TERMINATE_ONLASTIF */
1748
1749
1750 static void
1751 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
1752                                       union wpa_event_data *data)
1753 {
1754         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
1755                 return;
1756
1757         switch (data->interface_status.ievent) {
1758         case EVENT_INTERFACE_ADDED:
1759                 if (!wpa_s->interface_removed)
1760                         break;
1761                 wpa_s->interface_removed = 0;
1762                 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was added");
1763                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
1764                         wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the "
1765                                 "driver after interface was added");
1766                 }
1767                 break;
1768         case EVENT_INTERFACE_REMOVED:
1769                 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed");
1770                 wpa_s->interface_removed = 1;
1771                 wpa_supplicant_mark_disassoc(wpa_s);
1772                 l2_packet_deinit(wpa_s->l2);
1773                 wpa_s->l2 = NULL;
1774 #ifdef CONFIG_IBSS_RSN
1775                 ibss_rsn_deinit(wpa_s->ibss_rsn);
1776                 wpa_s->ibss_rsn = NULL;
1777 #endif /* CONFIG_IBSS_RSN */
1778 #ifdef CONFIG_TERMINATE_ONLASTIF
1779                 /* check if last interface */
1780                 if (!any_interfaces(wpa_s->global->ifaces))
1781                         eloop_terminate();
1782 #endif /* CONFIG_TERMINATE_ONLASTIF */
1783                 break;
1784         }
1785 }
1786
1787
1788 #ifdef CONFIG_PEERKEY
1789 static void
1790 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
1791                               union wpa_event_data *data)
1792 {
1793         if (data == NULL)
1794                 return;
1795         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
1796 }
1797 #endif /* CONFIG_PEERKEY */
1798
1799
1800 #ifdef CONFIG_TDLS
1801 static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
1802                                       union wpa_event_data *data)
1803 {
1804         if (data == NULL)
1805                 return;
1806         switch (data->tdls.oper) {
1807         case TDLS_REQUEST_SETUP:
1808                 wpa_tdls_start(wpa_s->wpa, data->tdls.peer);
1809                 break;
1810         case TDLS_REQUEST_TEARDOWN:
1811                 wpa_tdls_send_teardown(wpa_s->wpa, data->tdls.peer,
1812                                        data->tdls.reason_code);
1813                 break;
1814         }
1815 }
1816 #endif /* CONFIG_TDLS */
1817
1818
1819 #ifdef CONFIG_IEEE80211R
1820 static void
1821 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
1822                                  union wpa_event_data *data)
1823 {
1824         if (data == NULL)
1825                 return;
1826
1827         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
1828                                     data->ft_ies.ies_len,
1829                                     data->ft_ies.ft_action,
1830                                     data->ft_ies.target_ap,
1831                                     data->ft_ies.ric_ies,
1832                                     data->ft_ies.ric_ies_len) < 0) {
1833                 /* TODO: prevent MLME/driver from trying to associate? */
1834         }
1835 }
1836 #endif /* CONFIG_IEEE80211R */
1837
1838
1839 #ifdef CONFIG_IBSS_RSN
1840 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
1841                                                 union wpa_event_data *data)
1842 {
1843         struct wpa_ssid *ssid;
1844         if (wpa_s->wpa_state < WPA_ASSOCIATED)
1845                 return;
1846         if (data == NULL)
1847                 return;
1848         ssid = wpa_s->current_ssid;
1849         if (ssid == NULL)
1850                 return;
1851         if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
1852                 return;
1853
1854         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
1855 }
1856 #endif /* CONFIG_IBSS_RSN */
1857
1858
1859 #ifdef CONFIG_IEEE80211R
1860 static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
1861                          size_t len)
1862 {
1863         const u8 *sta_addr, *target_ap_addr;
1864         u16 status;
1865
1866         wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len);
1867         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
1868                 return; /* only SME case supported for now */
1869         if (len < 1 + 2 * ETH_ALEN + 2)
1870                 return;
1871         if (data[0] != 2)
1872                 return; /* Only FT Action Response is supported for now */
1873         sta_addr = data + 1;
1874         target_ap_addr = data + 1 + ETH_ALEN;
1875         status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN);
1876         wpa_dbg(wpa_s, MSG_DEBUG, "FT: Received FT Action Response: STA "
1877                 MACSTR " TargetAP " MACSTR " status %u",
1878                 MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
1879
1880         if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
1881                 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Foreign STA Address " MACSTR
1882                         " in FT Action Response", MAC2STR(sta_addr));
1883                 return;
1884         }
1885
1886         if (status) {
1887                 wpa_dbg(wpa_s, MSG_DEBUG, "FT: FT Action Response indicates "
1888                         "failure (status code %d)", status);
1889                 /* TODO: report error to FT code(?) */
1890                 return;
1891         }
1892
1893         if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2,
1894                                     len - (1 + 2 * ETH_ALEN + 2), 1,
1895                                     target_ap_addr, NULL, 0) < 0)
1896                 return;
1897
1898 #ifdef CONFIG_SME
1899         {
1900                 struct wpa_bss *bss;
1901                 bss = wpa_bss_get_bssid(wpa_s, target_ap_addr);
1902                 if (bss)
1903                         wpa_s->sme.freq = bss->freq;
1904                 wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT;
1905                 sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr,
1906                               WLAN_AUTH_FT);
1907         }
1908 #endif /* CONFIG_SME */
1909 }
1910 #endif /* CONFIG_IEEE80211R */
1911
1912
1913 static void wpa_supplicant_event_unprot_deauth(struct wpa_supplicant *wpa_s,
1914                                                struct unprot_deauth *e)
1915 {
1916 #ifdef CONFIG_IEEE80211W
1917         wpa_printf(MSG_DEBUG, "Unprotected Deauthentication frame "
1918                    "dropped: " MACSTR " -> " MACSTR
1919                    " (reason code %u)",
1920                    MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
1921         sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
1922 #endif /* CONFIG_IEEE80211W */
1923 }
1924
1925
1926 static void wpa_supplicant_event_unprot_disassoc(struct wpa_supplicant *wpa_s,
1927                                                  struct unprot_disassoc *e)
1928 {
1929 #ifdef CONFIG_IEEE80211W
1930         wpa_printf(MSG_DEBUG, "Unprotected Disassociation frame "
1931                    "dropped: " MACSTR " -> " MACSTR
1932                    " (reason code %u)",
1933                    MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
1934         sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
1935 #endif /* CONFIG_IEEE80211W */
1936 }
1937
1938
1939 static void wnm_action_rx(struct wpa_supplicant *wpa_s, struct rx_action *rx)
1940 {
1941         u8 action, mode;
1942         const u8 *pos, *end;
1943
1944         if (rx->data == NULL || rx->len == 0)
1945                 return;
1946
1947         pos = rx->data;
1948         end = pos + rx->len;
1949         action = *pos++;
1950
1951         wpa_printf(MSG_DEBUG, "WNM: RX action %u from " MACSTR,
1952                    action, MAC2STR(rx->sa));
1953         switch (action) {
1954         case WNM_BSS_TRANS_MGMT_REQ:
1955                 if (pos + 5 > end)
1956                         break;
1957                 wpa_printf(MSG_DEBUG, "WNM: BSS Transition Management "
1958                            "Request: dialog_token=%u request_mode=0x%x "
1959                            "disassoc_timer=%u validity_interval=%u",
1960                            pos[0], pos[1], WPA_GET_LE16(pos + 2), pos[4]);
1961                 mode = pos[1];
1962                 pos += 5;
1963                 if (mode & 0x08)
1964                         pos += 12; /* BSS Termination Duration */
1965                 if (mode & 0x10) {
1966                         char url[256];
1967                         if (pos + 1 > end || pos + 1 + pos[0] > end) {
1968                                 wpa_printf(MSG_DEBUG, "WNM: Invalid BSS "
1969                                            "Transition Management Request "
1970                                            "(URL)");
1971                                 break;
1972                         }
1973                         os_memcpy(url, pos + 1, pos[0]);
1974                         url[pos[0]] = '\0';
1975                         wpa_msg(wpa_s, MSG_INFO, "WNM: ESS Disassociation "
1976                                 "Imminent - session_info_url=%s", url);
1977                 }
1978                 break;
1979         }
1980 }
1981
1982
1983 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
1984                           union wpa_event_data *data)
1985 {
1986         struct wpa_supplicant *wpa_s = ctx;
1987         u16 reason_code = 0;
1988
1989         if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED &&
1990             event != EVENT_INTERFACE_ENABLED &&
1991             event != EVENT_INTERFACE_STATUS) {
1992                 wpa_dbg(wpa_s, MSG_DEBUG,
1993                         "Ignore event %s (%d) while interface is disabled",
1994                         event_to_string(event), event);
1995                 return;
1996         }
1997
1998         wpa_dbg(wpa_s, MSG_DEBUG, "Event %s (%d) received",
1999                 event_to_string(event), event);
2000
2001         switch (event) {
2002         case EVENT_AUTH:
2003                 sme_event_auth(wpa_s, data);
2004                 break;
2005         case EVENT_ASSOC:
2006                 wpa_supplicant_event_assoc(wpa_s, data);
2007                 break;
2008         case EVENT_DISASSOC:
2009                 wpa_dbg(wpa_s, MSG_DEBUG, "Disassociation notification");
2010                 if (data) {
2011                         wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u",
2012                                 data->disassoc_info.reason_code);
2013                         if (data->disassoc_info.addr)
2014                                 wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR,
2015                                         MAC2STR(data->disassoc_info.addr));
2016                 }
2017 #ifdef CONFIG_AP
2018                 if (wpa_s->ap_iface && data && data->disassoc_info.addr) {
2019                         hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
2020                                                data->disassoc_info.addr);
2021                         break;
2022                 }
2023 #endif /* CONFIG_AP */
2024                 if (data) {
2025                         reason_code = data->disassoc_info.reason_code;
2026                         wpa_hexdump(MSG_DEBUG, "Disassociation frame IE(s)",
2027                                     data->disassoc_info.ie,
2028                                     data->disassoc_info.ie_len);
2029 #ifdef CONFIG_P2P
2030                         wpas_p2p_disassoc_notif(
2031                                 wpa_s, data->disassoc_info.addr, reason_code,
2032                                 data->disassoc_info.ie,
2033                                 data->disassoc_info.ie_len);
2034 #endif /* CONFIG_P2P */
2035                 }
2036                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2037                         sme_event_disassoc(wpa_s, data);
2038                 /* fall through */
2039         case EVENT_DEAUTH:
2040                 if (event == EVENT_DEAUTH) {
2041                         wpa_dbg(wpa_s, MSG_DEBUG,
2042                                 "Deauthentication notification");
2043                         if (data) {
2044                                 reason_code = data->deauth_info.reason_code;
2045                                 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u",
2046                                         data->deauth_info.reason_code);
2047                                 if (data->deauth_info.addr) {
2048                                         wpa_dbg(wpa_s, MSG_DEBUG, " * address "
2049                                                 MACSTR,
2050                                                 MAC2STR(data->deauth_info.
2051                                                         addr));
2052                                 }
2053                                 wpa_hexdump(MSG_DEBUG,
2054                                             "Deauthentication frame IE(s)",
2055                                             data->deauth_info.ie,
2056                                             data->deauth_info.ie_len);
2057 #ifdef CONFIG_P2P
2058                                 wpas_p2p_deauth_notif(
2059                                         wpa_s, data->deauth_info.addr,
2060                                         reason_code,
2061                                         data->deauth_info.ie,
2062                                         data->deauth_info.ie_len);
2063 #endif /* CONFIG_P2P */
2064                         }
2065                 }
2066 #ifdef CONFIG_AP
2067                 if (wpa_s->ap_iface && data && data->deauth_info.addr) {
2068                         hostapd_notif_disassoc(wpa_s->ap_iface->bss[0],
2069                                                data->deauth_info.addr);
2070                         break;
2071                 }
2072 #endif /* CONFIG_AP */
2073                 wpa_supplicant_event_disassoc(wpa_s, reason_code);
2074                 break;
2075         case EVENT_MICHAEL_MIC_FAILURE:
2076                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
2077                 break;
2078 #ifndef CONFIG_NO_SCAN_PROCESSING
2079         case EVENT_SCAN_RESULTS:
2080                 wpa_supplicant_event_scan_results(wpa_s, data);
2081                 break;
2082 #endif /* CONFIG_NO_SCAN_PROCESSING */
2083         case EVENT_ASSOCINFO:
2084                 wpa_supplicant_event_associnfo(wpa_s, data);
2085                 break;
2086         case EVENT_INTERFACE_STATUS:
2087                 wpa_supplicant_event_interface_status(wpa_s, data);
2088                 break;
2089         case EVENT_PMKID_CANDIDATE:
2090                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
2091                 break;
2092 #ifdef CONFIG_PEERKEY
2093         case EVENT_STKSTART:
2094                 wpa_supplicant_event_stkstart(wpa_s, data);
2095                 break;
2096 #endif /* CONFIG_PEERKEY */
2097 #ifdef CONFIG_TDLS
2098         case EVENT_TDLS:
2099                 wpa_supplicant_event_tdls(wpa_s, data);
2100                 break;
2101 #endif /* CONFIG_TDLS */
2102 #ifdef CONFIG_IEEE80211R
2103         case EVENT_FT_RESPONSE:
2104                 wpa_supplicant_event_ft_response(wpa_s, data);
2105                 break;
2106 #endif /* CONFIG_IEEE80211R */
2107 #ifdef CONFIG_IBSS_RSN
2108         case EVENT_IBSS_RSN_START:
2109                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
2110                 break;
2111 #endif /* CONFIG_IBSS_RSN */
2112         case EVENT_ASSOC_REJECT:
2113                 if (data->assoc_reject.bssid)
2114                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
2115                                 "bssid=" MACSTR " status_code=%u",
2116                                 MAC2STR(data->assoc_reject.bssid),
2117                                 data->assoc_reject.status_code);
2118                 else
2119                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
2120                                 "status_code=%u",
2121                                 data->assoc_reject.status_code);
2122                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2123                         sme_event_assoc_reject(wpa_s, data);
2124                 break;
2125         case EVENT_AUTH_TIMED_OUT:
2126                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2127                         sme_event_auth_timed_out(wpa_s, data);
2128                 break;
2129         case EVENT_ASSOC_TIMED_OUT:
2130                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2131                         sme_event_assoc_timed_out(wpa_s, data);
2132                 break;
2133         case EVENT_TX_STATUS:
2134                 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS dst=" MACSTR
2135                         " type=%d stype=%d",
2136                         MAC2STR(data->tx_status.dst),
2137                         data->tx_status.type, data->tx_status.stype);
2138 #ifdef CONFIG_AP
2139                 if (wpa_s->ap_iface == NULL) {
2140 #ifdef CONFIG_OFFCHANNEL
2141                         if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
2142                             data->tx_status.stype == WLAN_FC_STYPE_ACTION)
2143                                 offchannel_send_action_tx_status(
2144                                         wpa_s, data->tx_status.dst,
2145                                         data->tx_status.data,
2146                                         data->tx_status.data_len,
2147                                         data->tx_status.ack ?
2148                                         OFFCHANNEL_SEND_ACTION_SUCCESS :
2149                                         OFFCHANNEL_SEND_ACTION_NO_ACK);
2150 #endif /* CONFIG_OFFCHANNEL */
2151                         break;
2152                 }
2153 #endif /* CONFIG_AP */
2154 #ifdef CONFIG_OFFCHANNEL
2155                 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS pending_dst="
2156                         MACSTR, MAC2STR(wpa_s->parent->pending_action_dst));
2157                 /*
2158                  * Catch TX status events for Action frames we sent via group
2159                  * interface in GO mode.
2160                  */
2161                 if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
2162                     data->tx_status.stype == WLAN_FC_STYPE_ACTION &&
2163                     os_memcmp(wpa_s->parent->pending_action_dst,
2164                               data->tx_status.dst, ETH_ALEN) == 0) {
2165                         offchannel_send_action_tx_status(
2166                                 wpa_s->parent, data->tx_status.dst,
2167                                 data->tx_status.data,
2168                                 data->tx_status.data_len,
2169                                 data->tx_status.ack ?
2170                                 OFFCHANNEL_SEND_ACTION_SUCCESS :
2171                                 OFFCHANNEL_SEND_ACTION_NO_ACK);
2172                         break;
2173                 }
2174 #endif /* CONFIG_OFFCHANNEL */
2175 #ifdef CONFIG_AP
2176                 switch (data->tx_status.type) {
2177                 case WLAN_FC_TYPE_MGMT:
2178                         ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
2179                                       data->tx_status.data_len,
2180                                       data->tx_status.stype,
2181                                       data->tx_status.ack);
2182                         break;
2183                 case WLAN_FC_TYPE_DATA:
2184                         ap_tx_status(wpa_s, data->tx_status.dst,
2185                                      data->tx_status.data,
2186                                      data->tx_status.data_len,
2187                                      data->tx_status.ack);
2188                         break;
2189                 }
2190 #endif /* CONFIG_AP */
2191                 break;
2192 #ifdef CONFIG_AP
2193         case EVENT_EAPOL_TX_STATUS:
2194                 ap_eapol_tx_status(wpa_s, data->eapol_tx_status.dst,
2195                                    data->eapol_tx_status.data,
2196                                    data->eapol_tx_status.data_len,
2197                                    data->eapol_tx_status.ack);
2198                 break;
2199         case EVENT_DRIVER_CLIENT_POLL_OK:
2200                 ap_client_poll_ok(wpa_s, data->client_poll.addr);
2201                 break;
2202         case EVENT_RX_FROM_UNKNOWN:
2203                 if (wpa_s->ap_iface == NULL)
2204                         break;
2205                 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.addr,
2206                                        data->rx_from_unknown.wds);
2207                 break;
2208         case EVENT_RX_MGMT:
2209                 if (wpa_s->ap_iface == NULL) {
2210 #ifdef CONFIG_P2P
2211                         u16 fc, stype;
2212                         const struct ieee80211_mgmt *mgmt;
2213                         mgmt = (const struct ieee80211_mgmt *)
2214                                 data->rx_mgmt.frame;
2215                         fc = le_to_host16(mgmt->frame_control);
2216                         stype = WLAN_FC_GET_STYPE(fc);
2217                         if (stype == WLAN_FC_STYPE_PROBE_REQ &&
2218                             data->rx_mgmt.frame_len > 24) {
2219                                 const u8 *src = mgmt->sa;
2220                                 const u8 *ie = mgmt->u.probe_req.variable;
2221                                 size_t ie_len = data->rx_mgmt.frame_len -
2222                                         (mgmt->u.probe_req.variable -
2223                                          data->rx_mgmt.frame);
2224                                 wpas_p2p_probe_req_rx(wpa_s, src, mgmt->da,
2225                                                       mgmt->bssid, ie, ie_len);
2226                                 break;
2227                         }
2228 #endif /* CONFIG_P2P */
2229                         wpa_dbg(wpa_s, MSG_DEBUG, "AP: ignore received "
2230                                 "management frame in non-AP mode");
2231                         break;
2232                 }
2233                 ap_mgmt_rx(wpa_s, &data->rx_mgmt);
2234                 break;
2235 #endif /* CONFIG_AP */
2236         case EVENT_RX_ACTION:
2237                 wpa_dbg(wpa_s, MSG_DEBUG, "Received Action frame: SA=" MACSTR
2238                         " Category=%u DataLen=%d freq=%d MHz",
2239                         MAC2STR(data->rx_action.sa),
2240                         data->rx_action.category, (int) data->rx_action.len,
2241                         data->rx_action.freq);
2242 #ifdef CONFIG_IEEE80211R
2243                 if (data->rx_action.category == WLAN_ACTION_FT) {
2244                         ft_rx_action(wpa_s, data->rx_action.data,
2245                                      data->rx_action.len);
2246                         break;
2247                 }
2248 #endif /* CONFIG_IEEE80211R */
2249 #ifdef CONFIG_IEEE80211W
2250 #ifdef CONFIG_SME
2251                 if (data->rx_action.category == WLAN_ACTION_SA_QUERY) {
2252                         sme_sa_query_rx(wpa_s, data->rx_action.sa,
2253                                         data->rx_action.data,
2254                                         data->rx_action.len);
2255                         break;
2256                 }
2257 #endif /* CONFIG_SME */
2258 #endif /* CONFIG_IEEE80211W */
2259 #ifdef CONFIG_GAS
2260                 if (data->rx_action.category == WLAN_ACTION_PUBLIC &&
2261                     gas_query_rx(wpa_s->gas, data->rx_action.da,
2262                                  data->rx_action.sa, data->rx_action.bssid,
2263                                  data->rx_action.data, data->rx_action.len,
2264                                  data->rx_action.freq) == 0)
2265                         break;
2266 #endif /* CONFIG_GAS */
2267                 if (data->rx_action.category == WLAN_ACTION_WNM) {
2268                         wnm_action_rx(wpa_s, &data->rx_action);
2269                         break;
2270                 }
2271 #ifdef CONFIG_TDLS
2272                 if (data->rx_action.category == WLAN_ACTION_PUBLIC &&
2273                     data->rx_action.len >= 4 &&
2274                     data->rx_action.data[0] == WLAN_TDLS_DISCOVERY_RESPONSE) {
2275                         wpa_dbg(wpa_s, MSG_DEBUG, "TDLS: Received Discovery "
2276                                 "Response from " MACSTR,
2277                                 MAC2STR(data->rx_action.sa));
2278                         break;
2279                 }
2280 #endif /* CONFIG_TDLS */
2281 #ifdef CONFIG_P2P
2282                 wpas_p2p_rx_action(wpa_s, data->rx_action.da,
2283                                    data->rx_action.sa,
2284                                    data->rx_action.bssid,
2285                                    data->rx_action.category,
2286                                    data->rx_action.data,
2287                                    data->rx_action.len, data->rx_action.freq);
2288 #endif /* CONFIG_P2P */
2289                 break;
2290         case EVENT_RX_PROBE_REQ:
2291                 if (data->rx_probe_req.sa == NULL ||
2292                     data->rx_probe_req.ie == NULL)
2293                         break;
2294 #ifdef CONFIG_AP
2295                 if (wpa_s->ap_iface) {
2296                         hostapd_probe_req_rx(wpa_s->ap_iface->bss[0],
2297                                              data->rx_probe_req.sa,
2298                                              data->rx_probe_req.da,
2299                                              data->rx_probe_req.bssid,
2300                                              data->rx_probe_req.ie,
2301                                              data->rx_probe_req.ie_len);
2302                         break;
2303                 }
2304 #endif /* CONFIG_AP */
2305 #ifdef CONFIG_P2P
2306                 wpas_p2p_probe_req_rx(wpa_s, data->rx_probe_req.sa,
2307                                       data->rx_probe_req.da,
2308                                       data->rx_probe_req.bssid,
2309                                       data->rx_probe_req.ie,
2310                                       data->rx_probe_req.ie_len);
2311 #endif /* CONFIG_P2P */
2312                 break;
2313         case EVENT_REMAIN_ON_CHANNEL:
2314 #ifdef CONFIG_OFFCHANNEL
2315                 offchannel_remain_on_channel_cb(
2316                         wpa_s, data->remain_on_channel.freq,
2317                         data->remain_on_channel.duration);
2318 #endif /* CONFIG_OFFCHANNEL */
2319 #ifdef CONFIG_P2P
2320                 wpas_p2p_remain_on_channel_cb(
2321                         wpa_s, data->remain_on_channel.freq,
2322                         data->remain_on_channel.duration);
2323 #endif /* CONFIG_P2P */
2324                 break;
2325         case EVENT_CANCEL_REMAIN_ON_CHANNEL:
2326 #ifdef CONFIG_OFFCHANNEL
2327                 offchannel_cancel_remain_on_channel_cb(
2328                         wpa_s, data->remain_on_channel.freq);
2329 #endif /* CONFIG_OFFCHANNEL */
2330 #ifdef CONFIG_P2P
2331                 wpas_p2p_cancel_remain_on_channel_cb(
2332                         wpa_s, data->remain_on_channel.freq);
2333 #endif /* CONFIG_P2P */
2334                 break;
2335 #ifdef CONFIG_P2P
2336         case EVENT_P2P_DEV_FOUND: {
2337                 struct p2p_peer_info peer_info;
2338
2339                 os_memset(&peer_info, 0, sizeof(peer_info));
2340                 if (data->p2p_dev_found.dev_addr)
2341                         os_memcpy(peer_info.p2p_device_addr,
2342                                   data->p2p_dev_found.dev_addr, ETH_ALEN);
2343                 if (data->p2p_dev_found.pri_dev_type)
2344                         os_memcpy(peer_info.pri_dev_type,
2345                                   data->p2p_dev_found.pri_dev_type,
2346                                   sizeof(peer_info.pri_dev_type));
2347                 if (data->p2p_dev_found.dev_name)
2348                         os_strlcpy(peer_info.device_name,
2349                                    data->p2p_dev_found.dev_name,
2350                                    sizeof(peer_info.device_name));
2351                 peer_info.config_methods = data->p2p_dev_found.config_methods;
2352                 peer_info.dev_capab = data->p2p_dev_found.dev_capab;
2353                 peer_info.group_capab = data->p2p_dev_found.group_capab;
2354
2355                 /*
2356                  * FIX: new_device=1 is not necessarily correct. We should
2357                  * maintain a P2P peer database in wpa_supplicant and update
2358                  * this information based on whether the peer is truly new.
2359                  */
2360                 wpas_dev_found(wpa_s, data->p2p_dev_found.addr, &peer_info, 1);
2361                 break;
2362                 }
2363         case EVENT_P2P_GO_NEG_REQ_RX:
2364                 wpas_go_neg_req_rx(wpa_s, data->p2p_go_neg_req_rx.src,
2365                                    data->p2p_go_neg_req_rx.dev_passwd_id);
2366                 break;
2367         case EVENT_P2P_GO_NEG_COMPLETED:
2368                 wpas_go_neg_completed(wpa_s, data->p2p_go_neg_completed.res);
2369                 break;
2370         case EVENT_P2P_PROV_DISC_REQUEST:
2371                 wpas_prov_disc_req(wpa_s, data->p2p_prov_disc_req.peer,
2372                                    data->p2p_prov_disc_req.config_methods,
2373                                    data->p2p_prov_disc_req.dev_addr,
2374                                    data->p2p_prov_disc_req.pri_dev_type,
2375                                    data->p2p_prov_disc_req.dev_name,
2376                                    data->p2p_prov_disc_req.supp_config_methods,
2377                                    data->p2p_prov_disc_req.dev_capab,
2378                                    data->p2p_prov_disc_req.group_capab);
2379                 break;
2380         case EVENT_P2P_PROV_DISC_RESPONSE:
2381                 wpas_prov_disc_resp(wpa_s, data->p2p_prov_disc_resp.peer,
2382                                     data->p2p_prov_disc_resp.config_methods);
2383                 break;
2384         case EVENT_P2P_SD_REQUEST:
2385                 wpas_sd_request(wpa_s, data->p2p_sd_req.freq,
2386                                 data->p2p_sd_req.sa,
2387                                 data->p2p_sd_req.dialog_token,
2388                                 data->p2p_sd_req.update_indic,
2389                                 data->p2p_sd_req.tlvs,
2390                                 data->p2p_sd_req.tlvs_len);
2391                 break;
2392         case EVENT_P2P_SD_RESPONSE:
2393                 wpas_sd_response(wpa_s, data->p2p_sd_resp.sa,
2394                                  data->p2p_sd_resp.update_indic,
2395                                  data->p2p_sd_resp.tlvs,
2396                                  data->p2p_sd_resp.tlvs_len);
2397                 break;
2398 #endif /* CONFIG_P2P */
2399         case EVENT_EAPOL_RX:
2400                 wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src,
2401                                         data->eapol_rx.data,
2402                                         data->eapol_rx.data_len);
2403                 break;
2404         case EVENT_SIGNAL_CHANGE:
2405                 bgscan_notify_signal_change(
2406                         wpa_s, data->signal_change.above_threshold,
2407                         data->signal_change.current_signal,
2408                         data->signal_change.current_noise,
2409                         data->signal_change.current_txrate);
2410                 break;
2411         case EVENT_INTERFACE_ENABLED:
2412                 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was enabled");
2413                 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
2414                         wpa_supplicant_update_mac_addr(wpa_s);
2415 #ifdef CONFIG_AP
2416                         if (!wpa_s->ap_iface) {
2417                                 wpa_supplicant_set_state(wpa_s,
2418                                                          WPA_DISCONNECTED);
2419                                 wpa_supplicant_req_scan(wpa_s, 0, 0);
2420                         } else
2421                                 wpa_supplicant_set_state(wpa_s,
2422                                                          WPA_COMPLETED);
2423 #else /* CONFIG_AP */
2424                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2425                         wpa_supplicant_req_scan(wpa_s, 0, 0);
2426 #endif /* CONFIG_AP */
2427                 }
2428                 break;
2429         case EVENT_INTERFACE_DISABLED:
2430                 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was disabled");
2431                 wpa_supplicant_mark_disassoc(wpa_s);
2432                 wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED);
2433                 break;
2434         case EVENT_CHANNEL_LIST_CHANGED:
2435                 if (wpa_s->drv_priv == NULL)
2436                         break; /* Ignore event during drv initialization */
2437 #ifdef CONFIG_P2P
2438                 wpas_p2p_update_channel_list(wpa_s);
2439 #endif /* CONFIG_P2P */
2440                 break;
2441         case EVENT_INTERFACE_UNAVAILABLE:
2442 #ifdef CONFIG_P2P
2443                 wpas_p2p_interface_unavailable(wpa_s);
2444 #endif /* CONFIG_P2P */
2445                 break;
2446         case EVENT_BEST_CHANNEL:
2447                 wpa_dbg(wpa_s, MSG_DEBUG, "Best channel event received "
2448                         "(%d %d %d)",
2449                         data->best_chan.freq_24, data->best_chan.freq_5,
2450                         data->best_chan.freq_overall);
2451                 wpa_s->best_24_freq = data->best_chan.freq_24;
2452                 wpa_s->best_5_freq = data->best_chan.freq_5;
2453                 wpa_s->best_overall_freq = data->best_chan.freq_overall;
2454 #ifdef CONFIG_P2P
2455                 wpas_p2p_update_best_channels(wpa_s, data->best_chan.freq_24,
2456                                               data->best_chan.freq_5,
2457                                               data->best_chan.freq_overall);
2458 #endif /* CONFIG_P2P */
2459                 break;
2460         case EVENT_UNPROT_DEAUTH:
2461                 wpa_supplicant_event_unprot_deauth(wpa_s,
2462                                                    &data->unprot_deauth);
2463                 break;
2464         case EVENT_UNPROT_DISASSOC:
2465                 wpa_supplicant_event_unprot_disassoc(wpa_s,
2466                                                      &data->unprot_disassoc);
2467                 break;
2468         case EVENT_STATION_LOW_ACK:
2469 #ifdef CONFIG_AP
2470                 if (wpa_s->ap_iface && data)
2471                         hostapd_event_sta_low_ack(wpa_s->ap_iface->bss[0],
2472                                                   data->low_ack.addr);
2473 #endif /* CONFIG_AP */
2474 #ifdef CONFIG_TDLS
2475                 if (data)
2476                         wpa_tdls_disable_link(wpa_s->wpa, data->low_ack.addr);
2477 #endif /* CONFIG_TDLS */
2478                 break;
2479         case EVENT_IBSS_PEER_LOST:
2480 #ifdef CONFIG_IBSS_RSN
2481                 ibss_rsn_stop(wpa_s->ibss_rsn, data->ibss_peer_lost.peer);
2482 #endif /* CONFIG_IBSS_RSN */
2483                 break;
2484         case EVENT_DRIVER_GTK_REKEY:
2485                 if (os_memcmp(data->driver_gtk_rekey.bssid,
2486                               wpa_s->bssid, ETH_ALEN))
2487                         break;
2488                 if (!wpa_s->wpa)
2489                         break;
2490                 wpa_sm_update_replay_ctr(wpa_s->wpa,
2491                                          data->driver_gtk_rekey.replay_ctr);
2492                 break;
2493         case EVENT_SCHED_SCAN_STOPPED:
2494                 wpa_s->sched_scanning = 0;
2495                 wpa_supplicant_notify_scanning(wpa_s, 0);
2496
2497                 /*
2498                  * If we timed out, start a new sched scan to continue
2499                  * searching for more SSIDs.
2500                  */
2501                 if (wpa_s->sched_scan_timed_out)
2502                         wpa_supplicant_req_sched_scan(wpa_s);
2503                 break;
2504         case EVENT_WPS_BUTTON_PUSHED:
2505 #ifdef CONFIG_WPS
2506                 wpas_wps_start_pbc(wpa_s, NULL, 0);
2507 #endif /* CONFIG_WPS */
2508                 break;
2509         default:
2510                 wpa_msg(wpa_s, MSG_INFO, "Unknown event %d", event);
2511                 break;
2512         }
2513 }