wpa_supplicant/events.c

   1 /*
   2  * WPA Supplicant - Driver event processing
   3  * Copyright (c) 2003-2014, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "eapol_supp/eapol_supp_sm.h"
  13 #include "rsn_supp/wpa.h"
  14 #include "eloop.h"
  15 #include "config.h"
  16 #include "l2_packet/l2_packet.h"
  17 #include "wpa_supplicant_i.h"
  18 #include "driver_i.h"
  19 #include "pcsc_funcs.h"
  20 #include "rsn_supp/preauth.h"
  21 #include "rsn_supp/pmksa_cache.h"
  22 #include "common/wpa_ctrl.h"
  23 #include "eap_peer/eap.h"
  24 #include "ap/hostapd.h"
  25 #include "p2p/p2p.h"
  26 #include "wnm_sta.h"
  27 #include "notify.h"
  28 #include "common/ieee802_11_defs.h"
  29 #include "common/ieee802_11_common.h"
  30 #include "crypto/random.h"
  31 #include "blacklist.h"
  32 #include "wpas_glue.h"
  33 #include "wps_supplicant.h"
  34 #include "ibss_rsn.h"
  35 #include "sme.h"
  36 #include "gas_query.h"
  37 #include "p2p_supplicant.h"
  38 #include "bgscan.h"
  39 #include "autoscan.h"
  40 #include "ap.h"
  41 #include "bss.h"
  42 #include "scan.h"
  43 #include "offchannel.h"
  44 #include "interworking.h"
  45
  46
  47 #ifndef CONFIG_NO_SCAN_PROCESSING
  48 static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,
  49                                               int new_scan, int own_request);
  50 #endif /* CONFIG_NO_SCAN_PROCESSING */
  51
  52
  53 static int wpas_temp_disabled(struct wpa_supplicant *wpa_s,
  54                               struct wpa_ssid *ssid)
  55 {
  56         struct os_reltime now;
  57
  58         if (ssid == NULL || ssid->disabled_until.sec == 0)
  59                 return 0;
  60
  61         os_get_reltime(&now);
  62         if (ssid->disabled_until.sec > now.sec)
  63                 return ssid->disabled_until.sec - now.sec;
  64
  65         wpas_clear_temp_disabled(wpa_s, ssid, 0);
  66
  67         return 0;
  68 }
  69
  70
  71 static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
  72 {
  73         struct wpa_ssid *ssid, *old_ssid;
  74         int res;
  75
  76         if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
  77                 return 0;
  78
  79         wpa_dbg(wpa_s, MSG_DEBUG, "Select network based on association "
  80                 "information");
  81         ssid = wpa_supplicant_get_ssid(wpa_s);
  82         if (ssid == NULL) {
  83                 wpa_msg(wpa_s, MSG_INFO,
  84                         "No network configuration found for the current AP");
  85                 return -1;
  86         }
  87
  88         if (wpas_network_disabled(wpa_s, ssid)) {
  89                 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is disabled");
  90                 return -1;
  91         }
  92
  93         if (disallowed_bssid(wpa_s, wpa_s->bssid) ||
  94             disallowed_ssid(wpa_s, ssid->ssid, ssid->ssid_len)) {
  95                 wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS is disallowed");
  96                 return -1;
  97         }
  98
  99         res = wpas_temp_disabled(wpa_s, ssid);
 100         if (res > 0) {
 101                 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is temporarily "
 102                         "disabled for %d second(s)", res);
 103                 return -1;
 104         }
 105
 106         wpa_dbg(wpa_s, MSG_DEBUG, "Network configuration found for the "
 107                 "current AP");
 108         if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
 109                 u8 wpa_ie[80];
 110                 size_t wpa_ie_len = sizeof(wpa_ie);
 111                 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 112                                               wpa_ie, &wpa_ie_len) < 0)
 113                         wpa_dbg(wpa_s, MSG_DEBUG, "Could not set WPA suites");
 114         } else {
 115                 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 116         }
 117
 118         if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
 119                 eapol_sm_invalidate_cached_session(wpa_s->eapol);
 120         old_ssid = wpa_s->current_ssid;
 121         wpa_s->current_ssid = ssid;
 122         wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 123         wpa_supplicant_initiate_eapol(wpa_s);
 124         if (old_ssid != wpa_s->current_ssid)
 125                 wpas_notify_network_changed(wpa_s);
 126
 127         return 0;
 128 }
 129
 130
 131 void wpa_supplicant_stop_countermeasures(void *eloop_ctx, void *sock_ctx)
 132 {
 133         struct wpa_supplicant *wpa_s = eloop_ctx;
 134
 135         if (wpa_s->countermeasures) {
 136                 wpa_s->countermeasures = 0;
 137                 wpa_drv_set_countermeasures(wpa_s, 0);
 138                 wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
 139                 wpa_supplicant_req_scan(wpa_s, 0, 0);
 140         }
 141 }
 142
 143
 144 void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 145 {
 146         int bssid_changed;
 147
 148         wnm_bss_keep_alive_deinit(wpa_s);
 149
 150 #ifdef CONFIG_IBSS_RSN
 151         ibss_rsn_deinit(wpa_s->ibss_rsn);
 152         wpa_s->ibss_rsn = NULL;
 153 #endif /* CONFIG_IBSS_RSN */
 154
 155 #ifdef CONFIG_AP
 156         wpa_supplicant_ap_deinit(wpa_s);
 157 #endif /* CONFIG_AP */
 158
 159         if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
 160                 return;
 161
 162         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 163         bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
 164         os_memset(wpa_s->bssid, 0, ETH_ALEN);
 165         os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 166 #ifdef CONFIG_SME
 167         wpa_s->sme.prev_bssid_set = 0;
 168 #endif /* CONFIG_SME */
 169 #ifdef CONFIG_P2P
 170         os_memset(wpa_s->go_dev_addr, 0, ETH_ALEN);
 171 #endif /* CONFIG_P2P */
 172         wpa_s->current_bss = NULL;
 173         wpa_s->assoc_freq = 0;
 174 #ifdef CONFIG_IEEE80211R
 175 #ifdef CONFIG_SME
 176         if (wpa_s->sme.ft_ies)
 177                 sme_update_ft_ies(wpa_s, NULL, NULL, 0);
 178 #endif /* CONFIG_SME */
 179 #endif /* CONFIG_IEEE80211R */
 180
 181         if (bssid_changed)
 182                 wpas_notify_bssid_changed(wpa_s);
 183
 184         eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 185         eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 186         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
 187                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 188         wpa_s->ap_ies_from_associnfo = 0;
 189         wpa_s->current_ssid = NULL;
 190         eapol_sm_notify_config(wpa_s->eapol, NULL, NULL);
 191         wpa_s->key_mgmt = 0;
 192 }
 193
 194
 195 static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 196 {
 197         struct wpa_ie_data ie;
 198         int pmksa_set = -1;
 199         size_t i;
 200
 201         if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 202             ie.pmkid == NULL)
 203                 return;
 204
 205         for (i = 0; i < ie.num_pmkid; i++) {
 206                 pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 207                                                     ie.pmkid + i * PMKID_LEN,
 208                                                     NULL, NULL, 0);
 209                 if (pmksa_set == 0) {
 210                         eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 211                         break;
 212                 }
 213         }
 214
 215         wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from "
 216                 "PMKSA cache", pmksa_set == 0 ? "" : "not ");
 217 }
 218
 219
 220 static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 221                                                  union wpa_event_data *data)
 222 {
 223         if (data == NULL) {
 224                 wpa_dbg(wpa_s, MSG_DEBUG, "RSN: No data in PMKID candidate "
 225                         "event");
 226                 return;
 227         }
 228         wpa_dbg(wpa_s, MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 229                 " index=%d preauth=%d",
 230                 MAC2STR(data->pmkid_candidate.bssid),
 231                 data->pmkid_candidate.index,
 232                 data->pmkid_candidate.preauth);
 233
 234         pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 235                             data->pmkid_candidate.index,
 236                             data->pmkid_candidate.preauth);
 237 }
 238
 239
 240 static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 241 {
 242         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 243             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 244                 return 0;
 245
 246 #ifdef IEEE8021X_EAPOL
 247         if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 248             wpa_s->current_ssid &&
 249             !(wpa_s->current_ssid->eapol_flags &
 250               (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 251                EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 252                 /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 253                  * plaintext or static WEP keys). */
 254                 return 0;
 255         }
 256 #endif /* IEEE8021X_EAPOL */
 257
 258         return 1;
 259 }
 260
 261
 262 /**
 263  * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 264  * @wpa_s: pointer to wpa_supplicant data
 265  * @ssid: Configuration data for the network
 266  * Returns: 0 on success, -1 on failure
 267  *
 268  * This function is called when starting authentication with a network that is
 269  * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 270  */
 271 int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 272                               struct wpa_ssid *ssid)
 273 {
 274 #ifdef IEEE8021X_EAPOL
 275 #ifdef PCSC_FUNCS
 276         int aka = 0, sim = 0;
 277
 278         if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL ||
 279             wpa_s->conf->external_sim)
 280                 return 0;
 281
 282         if (ssid->eap.eap_methods == NULL) {
 283                 sim = 1;
 284                 aka = 1;
 285         } else {
 286                 struct eap_method_type *eap = ssid->eap.eap_methods;
 287                 while (eap->vendor != EAP_VENDOR_IETF ||
 288                        eap->method != EAP_TYPE_NONE) {
 289                         if (eap->vendor == EAP_VENDOR_IETF) {
 290                                 if (eap->method == EAP_TYPE_SIM)
 291                                         sim = 1;
 292                                 else if (eap->method == EAP_TYPE_AKA ||
 293                                          eap->method == EAP_TYPE_AKA_PRIME)
 294                                         aka = 1;
 295                         }
 296                         eap++;
 297                 }
 298         }
 299
 300         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 301                 sim = 0;
 302         if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL &&
 303             eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA_PRIME) ==
 304             NULL)
 305                 aka = 0;
 306
 307         if (!sim && !aka) {
 308                 wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to "
 309                         "use SIM, but neither EAP-SIM nor EAP-AKA are "
 310                         "enabled");
 311                 return 0;
 312         }
 313
 314         wpa_dbg(wpa_s, MSG_DEBUG, "Selected network is configured to use SIM "
 315                 "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 316
 317         wpa_s->scard = scard_init(NULL);
 318         if (wpa_s->scard == NULL) {
 319                 wpa_msg(wpa_s, MSG_WARNING, "Failed to initialize SIM "
 320                         "(pcsc-lite)");
 321                 return -1;
 322         }
 323         wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 324         eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 325 #endif /* PCSC_FUNCS */
 326 #endif /* IEEE8021X_EAPOL */
 327
 328         return 0;
 329 }
 330
 331
 332 #ifndef CONFIG_NO_SCAN_PROCESSING
 333
 334 static int has_wep_key(struct wpa_ssid *ssid)
 335 {
 336         int i;
 337
 338         for (i = 0; i < NUM_WEP_KEYS; i++) {
 339                 if (ssid->wep_key_len[i])
 340                         return 1;
 341         }
 342
 343         return 0;
 344 }
 345
 346
 347 static int wpa_supplicant_match_privacy(struct wpa_bss *bss,
 348                                         struct wpa_ssid *ssid)
 349 {
 350         int privacy = 0;
 351
 352         if (ssid->mixed_cell)
 353                 return 1;
 354
 355 #ifdef CONFIG_WPS
 356         if (ssid->key_mgmt & WPA_KEY_MGMT_WPS)
 357                 return 1;
 358 #endif /* CONFIG_WPS */
 359
 360         if (has_wep_key(ssid))
 361                 privacy = 1;
 362
 363 #ifdef IEEE8021X_EAPOL
 364         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 365             ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 366                                  EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 367                 privacy = 1;
 368 #endif /* IEEE8021X_EAPOL */
 369
 370         if (wpa_key_mgmt_wpa(ssid->key_mgmt))
 371                 privacy = 1;
 372
 373         if (bss->caps & IEEE80211_CAP_PRIVACY)
 374                 return privacy;
 375         return !privacy;
 376 }
 377
 378
 379 static int wpa_supplicant_ssid_bss_match(struct wpa_supplicant *wpa_s,
 380                                          struct wpa_ssid *ssid,
 381                                          struct wpa_bss *bss)
 382 {
 383         struct wpa_ie_data ie;
 384         int proto_match = 0;
 385         const u8 *rsn_ie, *wpa_ie;
 386         int ret;
 387         int wep_ok;
 388
 389         ret = wpas_wps_ssid_bss_match(wpa_s, ssid, bss);
 390         if (ret >= 0)
 391                 return ret;
 392
 393         /* Allow TSN if local configuration accepts WEP use without WPA/WPA2 */
 394         wep_ok = !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
 395                 (((ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 396                   ssid->wep_key_len[ssid->wep_tx_keyidx] > 0) ||
 397                  (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA));
 398
 399         rsn_ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 400         while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 401                 proto_match++;
 402
 403                 if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 404                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - parse "
 405                                 "failed");
 406                         break;
 407                 }
 408
 409                 if (wep_ok &&
 410                     (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
 411                 {
 412                         wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on TSN "
 413                                 "in RSN IE");
 414                         return 1;
 415                 }
 416
 417                 if (!(ie.proto & ssid->proto)) {
 418                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - proto "
 419                                 "mismatch");
 420                         break;
 421                 }
 422
 423                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 424                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - PTK "
 425                                 "cipher mismatch");
 426                         break;
 427                 }
 428
 429                 if (!(ie.group_cipher & ssid->group_cipher)) {
 430                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - GTK "
 431                                 "cipher mismatch");
 432                         break;
 433                 }
 434
 435                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 436                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - key mgmt "
 437                                 "mismatch");
 438                         break;
 439                 }
 440
 441 #ifdef CONFIG_IEEE80211W
 442                 if (!(ie.capabilities & WPA_CAPABILITY_MFPC) &&
 443                     (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
 444                      wpa_s->conf->pmf : ssid->ieee80211w) ==
 445                     MGMT_FRAME_PROTECTION_REQUIRED) {
 446                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip RSN IE - no mgmt "
 447                                 "frame protection");
 448                         break;
 449                 }
 450 #endif /* CONFIG_IEEE80211W */
 451
 452                 wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on RSN IE");
 453                 return 1;
 454         }
 455
 456         wpa_ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 457         while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 458                 proto_match++;
 459
 460                 if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 461                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - parse "
 462                                 "failed");
 463                         break;
 464                 }
 465
 466                 if (wep_ok &&
 467                     (ie.group_cipher & (WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104)))
 468                 {
 469                         wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on TSN "
 470                                 "in WPA IE");
 471                         return 1;
 472                 }
 473
 474                 if (!(ie.proto & ssid->proto)) {
 475                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - proto "
 476                                 "mismatch");
 477                         break;
 478                 }
 479
 480                 if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 481                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - PTK "
 482                                 "cipher mismatch");
 483                         break;
 484                 }
 485
 486                 if (!(ie.group_cipher & ssid->group_cipher)) {
 487                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - GTK "
 488                                 "cipher mismatch");
 489                         break;
 490                 }
 491
 492                 if (!(ie.key_mgmt & ssid->key_mgmt)) {
 493                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip WPA IE - key mgmt "
 494                                 "mismatch");
 495                         break;
 496                 }
 497
 498                 wpa_dbg(wpa_s, MSG_DEBUG, "   selected based on WPA IE");
 499                 return 1;
 500         }
 501
 502         if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) && !wpa_ie &&
 503             !rsn_ie) {
 504                 wpa_dbg(wpa_s, MSG_DEBUG, "   allow for non-WPA IEEE 802.1X");
 505                 return 1;
 506         }
 507
 508         if ((ssid->proto & (WPA_PROTO_WPA | WPA_PROTO_RSN)) &&
 509             wpa_key_mgmt_wpa(ssid->key_mgmt) && proto_match == 0) {
 510                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - no WPA/RSN proto match");
 511                 return 0;
 512         }
 513
 514         if (!wpa_key_mgmt_wpa(ssid->key_mgmt)) {
 515                 wpa_dbg(wpa_s, MSG_DEBUG, "   allow in non-WPA/WPA2");
 516                 return 1;
 517         }
 518
 519         wpa_dbg(wpa_s, MSG_DEBUG, "   reject due to mismatch with "
 520                 "WPA/WPA2");
 521
 522         return 0;
 523 }
 524
 525
 526 static int freq_allowed(int *freqs, int freq)
 527 {
 528         int i;
 529
 530         if (freqs == NULL)
 531                 return 1;
 532
 533         for (i = 0; freqs[i]; i++)
 534                 if (freqs[i] == freq)
 535                         return 1;
 536         return 0;
 537 }
 538
 539
 540 static int ht_supported(const struct hostapd_hw_modes *mode)
 541 {
 542         if (!(mode->flags & HOSTAPD_MODE_FLAG_HT_INFO_KNOWN)) {
 543                 /*
 544                  * The driver did not indicate whether it supports HT. Assume
 545                  * it does to avoid connection issues.
 546                  */
 547                 return 1;
 548         }
 549
 550         /*
 551          * IEEE Std 802.11n-2009 20.1.1:
 552          * An HT non-AP STA shall support all EQM rates for one spatial stream.
 553          */
 554         return mode->mcs_set[0] == 0xff;
 555 }
 556
 557
 558 static int vht_supported(const struct hostapd_hw_modes *mode)
 559 {
 560         if (!(mode->flags & HOSTAPD_MODE_FLAG_VHT_INFO_KNOWN)) {
 561                 /*
 562                  * The driver did not indicate whether it supports VHT. Assume
 563                  * it does to avoid connection issues.
 564                  */
 565                 return 1;
 566         }
 567
 568         /*
 569          * A VHT non-AP STA shall support MCS 0-7 for one spatial stream.
 570          * TODO: Verify if this complies with the standard
 571          */
 572         return (mode->vht_mcs_set[0] & 0x3) != 3;
 573 }
 574
 575
 576 static int rate_match(struct wpa_supplicant *wpa_s, struct wpa_bss *bss)
 577 {
 578         const struct hostapd_hw_modes *mode = NULL, *modes;
 579         const u8 scan_ie[2] = { WLAN_EID_SUPP_RATES, WLAN_EID_EXT_SUPP_RATES };
 580         const u8 *rate_ie;
 581         int i, j, k;
 582
 583         if (bss->freq == 0)
 584                 return 1; /* Cannot do matching without knowing band */
 585
 586         modes = wpa_s->hw.modes;
 587         if (modes == NULL) {
 588                 /*
 589                  * The driver does not provide any additional information
 590                  * about the utilized hardware, so allow the connection attempt
 591                  * to continue.
 592                  */
 593                 return 1;
 594         }
 595
 596         for (i = 0; i < wpa_s->hw.num_modes; i++) {
 597                 for (j = 0; j < modes[i].num_channels; j++) {
 598                         int freq = modes[i].channels[j].freq;
 599                         if (freq == bss->freq) {
 600                                 if (mode &&
 601                                     mode->mode == HOSTAPD_MODE_IEEE80211G)
 602                                         break; /* do not allow 802.11b replace
 603                                                 * 802.11g */
 604                                 mode = &modes[i];
 605                                 break;
 606                         }
 607                 }
 608         }
 609
 610         if (mode == NULL)
 611                 return 0;
 612
 613         for (i = 0; i < (int) sizeof(scan_ie); i++) {
 614                 rate_ie = wpa_bss_get_ie(bss, scan_ie[i]);
 615                 if (rate_ie == NULL)
 616                         continue;
 617
 618                 for (j = 2; j < rate_ie[1] + 2; j++) {
 619                         int flagged = !!(rate_ie[j] & 0x80);
 620                         int r = (rate_ie[j] & 0x7f) * 5;
 621
 622                         /*
 623                          * IEEE Std 802.11n-2009 7.3.2.2:
 624                          * The new BSS Membership selector value is encoded
 625                          * like a legacy basic rate, but it is not a rate and
 626                          * only indicates if the BSS members are required to
 627                          * support the mandatory features of Clause 20 [HT PHY]
 628                          * in order to join the BSS.
 629                          */
 630                         if (flagged && ((rate_ie[j] & 0x7f) ==
 631                                         BSS_MEMBERSHIP_SELECTOR_HT_PHY)) {
 632                                 if (!ht_supported(mode)) {
 633                                         wpa_dbg(wpa_s, MSG_DEBUG,
 634                                                 "   hardware does not support "
 635                                                 "HT PHY");
 636                                         return 0;
 637                                 }
 638                                 continue;
 639                         }
 640
 641                         /* There's also a VHT selector for 802.11ac */
 642                         if (flagged && ((rate_ie[j] & 0x7f) ==
 643                                         BSS_MEMBERSHIP_SELECTOR_VHT_PHY)) {
 644                                 if (!vht_supported(mode)) {
 645                                         wpa_dbg(wpa_s, MSG_DEBUG,
 646                                                 "   hardware does not support "
 647                                                 "VHT PHY");
 648                                         return 0;
 649                                 }
 650                                 continue;
 651                         }
 652
 653                         if (!flagged)
 654                                 continue;
 655
 656                         /* check for legacy basic rates */
 657                         for (k = 0; k < mode->num_rates; k++) {
 658                                 if (mode->rates[k] == r)
 659                                         break;
 660                         }
 661                         if (k == mode->num_rates) {
 662                                 /*
 663                                  * IEEE Std 802.11-2007 7.3.2.2 demands that in
 664                                  * order to join a BSS all required rates
 665                                  * have to be supported by the hardware.
 666                                  */
 667                                 wpa_dbg(wpa_s, MSG_DEBUG, "   hardware does "
 668                                         "not support required rate %d.%d Mbps",
 669                                         r / 10, r % 10);
 670                                 return 0;
 671                         }
 672                 }
 673         }
 674
 675         return 1;
 676 }
 677
 678
 679 static int bss_is_dmg(struct wpa_bss *bss)
 680 {
 681         return bss->freq > 45000;
 682 }
 683
 684
 685 /*
 686  * Test whether BSS is in an ESS.
 687  * This is done differently in DMG (60 GHz) and non-DMG bands
 688  */
 689 static int bss_is_ess(struct wpa_bss *bss)
 690 {
 691         if (bss_is_dmg(bss)) {
 692                 return (bss->caps & IEEE80211_CAP_DMG_MASK) ==
 693                         IEEE80211_CAP_DMG_AP;
 694         }
 695
 696         return ((bss->caps & (IEEE80211_CAP_ESS | IEEE80211_CAP_IBSS)) ==
 697                 IEEE80211_CAP_ESS);
 698 }
 699
 700
 701 static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
 702                                             int i, struct wpa_bss *bss,
 703                                             struct wpa_ssid *group)
 704 {
 705         u8 wpa_ie_len, rsn_ie_len;
 706         int wpa;
 707         struct wpa_blacklist *e;
 708         const u8 *ie;
 709         struct wpa_ssid *ssid;
 710
 711         ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 712         wpa_ie_len = ie ? ie[1] : 0;
 713
 714         ie = wpa_bss_get_ie(bss, WLAN_EID_RSN);
 715         rsn_ie_len = ie ? ie[1] : 0;
 716
 717         wpa_dbg(wpa_s, MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 718                 "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x level=%d%s%s",
 719                 i, MAC2STR(bss->bssid), wpa_ssid_txt(bss->ssid, bss->ssid_len),
 720                 wpa_ie_len, rsn_ie_len, bss->caps, bss->level,
 721                 wpa_bss_get_vendor_ie(bss, WPS_IE_VENDOR_TYPE) ? " wps" : "",
 722                 (wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) ||
 723                  wpa_bss_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) ?
 724                 " p2p" : "");
 725
 726         e = wpa_blacklist_get(wpa_s, bss->bssid);
 727         if (e) {
 728                 int limit = 1;
 729                 if (wpa_supplicant_enabled_networks(wpa_s) == 1) {
 730                         /*
 731                          * When only a single network is enabled, we can
 732                          * trigger blacklisting on the first failure. This
 733                          * should not be done with multiple enabled networks to
 734                          * avoid getting forced to move into a worse ESS on
 735                          * single error if there are no other BSSes of the
 736                          * current ESS.
 737                          */
 738                         limit = 0;
 739                 }
 740                 if (e->count > limit) {
 741                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - blacklisted "
 742                                 "(count=%d limit=%d)", e->count, limit);
 743                         return NULL;
 744                 }
 745         }
 746
 747         if (bss->ssid_len == 0) {
 748                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - SSID not known");
 749                 return NULL;
 750         }
 751
 752         if (disallowed_bssid(wpa_s, bss->bssid)) {
 753                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - BSSID disallowed");
 754                 return NULL;
 755         }
 756
 757         if (disallowed_ssid(wpa_s, bss->ssid, bss->ssid_len)) {
 758                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - SSID disallowed");
 759                 return NULL;
 760         }
 761
 762         wpa = wpa_ie_len > 0 || rsn_ie_len > 0;
 763
 764         for (ssid = group; ssid; ssid = ssid->pnext) {
 765                 int check_ssid = wpa ? 1 : (ssid->ssid_len != 0);
 766                 int res;
 767
 768                 if (wpas_network_disabled(wpa_s, ssid)) {
 769                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - disabled");
 770                         continue;
 771                 }
 772
 773                 res = wpas_temp_disabled(wpa_s, ssid);
 774                 if (res > 0) {
 775                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - disabled "
 776                                 "temporarily for %d second(s)", res);
 777                         continue;
 778                 }
 779
 780 #ifdef CONFIG_WPS
 781                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && e && e->count > 0) {
 782                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - blacklisted "
 783                                 "(WPS)");
 784                         continue;
 785                 }
 786
 787                 if (wpa && ssid->ssid_len == 0 &&
 788                     wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 789                         check_ssid = 0;
 790
 791                 if (!wpa && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
 792                         /* Only allow wildcard SSID match if an AP
 793                          * advertises active WPS operation that matches
 794                          * with our mode. */
 795                         check_ssid = 1;
 796                         if (ssid->ssid_len == 0 &&
 797                             wpas_wps_ssid_wildcard_ok(wpa_s, ssid, bss))
 798                                 check_ssid = 0;
 799                 }
 800 #endif /* CONFIG_WPS */
 801
 802                 if (ssid->bssid_set && ssid->ssid_len == 0 &&
 803                     os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) == 0)
 804                         check_ssid = 0;
 805
 806                 if (check_ssid &&
 807                     (bss->ssid_len != ssid->ssid_len ||
 808                      os_memcmp(bss->ssid, ssid->ssid, bss->ssid_len) != 0)) {
 809                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - SSID mismatch");
 810                         continue;
 811                 }
 812
 813                 if (ssid->bssid_set &&
 814                     os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0) {
 815                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - BSSID mismatch");
 816                         continue;
 817                 }
 818
 819                 if (!wpa_supplicant_ssid_bss_match(wpa_s, ssid, bss))
 820                         continue;
 821
 822                 if (!wpa &&
 823                     !(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 824                     !(ssid->key_mgmt & WPA_KEY_MGMT_WPS) &&
 825                     !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) {
 826                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - non-WPA network "
 827                                 "not allowed");
 828                         continue;
 829                 }
 830
 831                 if (wpa && !wpa_key_mgmt_wpa(ssid->key_mgmt) &&
 832                     has_wep_key(ssid)) {
 833                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - ignore WPA/WPA2 AP for WEP network block");
 834                         continue;
 835                 }
 836
 837                 if (!wpa_supplicant_match_privacy(bss, ssid)) {
 838                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - privacy "
 839                                 "mismatch");
 840                         continue;
 841                 }
 842
 843                 if (!bss_is_ess(bss)) {
 844                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - not ESS network");
 845                         continue;
 846                 }
 847
 848                 if (!freq_allowed(ssid->freq_list, bss->freq)) {
 849                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - frequency not "
 850                                 "allowed");
 851                         continue;
 852                 }
 853
 854                 if (!rate_match(wpa_s, bss)) {
 855                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - rate sets do "
 856                                 "not match");
 857                         continue;
 858                 }
 859
 860 #ifdef CONFIG_P2P
 861                 if (ssid->p2p_group &&
 862                     !wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) &&
 863                     !wpa_bss_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) {
 864                         wpa_dbg(wpa_s, MSG_DEBUG, "   skip - no P2P IE seen");
 865                         continue;
 866                 }
 867
 868                 if (!is_zero_ether_addr(ssid->go_p2p_dev_addr)) {
 869                         struct wpabuf *p2p_ie;
 870                         u8 dev_addr[ETH_ALEN];
 871
 872                         ie = wpa_bss_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE);
 873                         if (ie == NULL) {
 874                                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - no P2P element");
 875                                 continue;
 876                         }
 877                         p2p_ie = wpa_bss_get_vendor_ie_multi(
 878                                 bss, P2P_IE_VENDOR_TYPE);
 879                         if (p2p_ie == NULL) {
 880                                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - could not fetch P2P element");
 881                                 continue;
 882                         }
 883
 884                         if (p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr) < 0
 885                             || os_memcmp(dev_addr, ssid->go_p2p_dev_addr,
 886                                          ETH_ALEN) != 0) {
 887                                 wpa_dbg(wpa_s, MSG_DEBUG, "   skip - no matching GO P2P Device Address in P2P element");
 888                                 wpabuf_free(p2p_ie);
 889                                 continue;
 890                         }
 891                         wpabuf_free(p2p_ie);
 892                 }
 893
 894                 /*
 895                  * TODO: skip the AP if its P2P IE has Group Formation
 896                  * bit set in the P2P Group Capability Bitmap and we
 897                  * are not in Group Formation with that device.
 898                  */
 899 #endif /* CONFIG_P2P */
 900
 901                 /* Matching configuration found */
 902                 return ssid;
 903         }
 904
 905         /* No matching configuration found */
 906         return NULL;
 907 }
 908
 909
 910 static struct wpa_bss *
 911 wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s,
 912                           struct wpa_ssid *group,
 913                           struct wpa_ssid **selected_ssid)
 914 {
 915         unsigned int i;
 916
 917         wpa_dbg(wpa_s, MSG_DEBUG, "Selecting BSS from priority group %d",
 918                 group->priority);
 919
 920         for (i = 0; i < wpa_s->last_scan_res_used; i++) {
 921                 struct wpa_bss *bss = wpa_s->last_scan_res[i];
 922                 *selected_ssid = wpa_scan_res_match(wpa_s, i, bss, group);
 923                 if (!*selected_ssid)
 924                         continue;
 925                 wpa_dbg(wpa_s, MSG_DEBUG, "   selected BSS " MACSTR
 926                         " ssid='%s'",
 927                         MAC2STR(bss->bssid),
 928                         wpa_ssid_txt(bss->ssid, bss->ssid_len));
 929                 return bss;
 930         }
 931
 932         return NULL;
 933 }
 934
 935
 936 struct wpa_bss * wpa_supplicant_pick_network(struct wpa_supplicant *wpa_s,
 937                                              struct wpa_ssid **selected_ssid)
 938 {
 939         struct wpa_bss *selected = NULL;
 940         int prio;
 941
 942         if (wpa_s->last_scan_res == NULL ||
 943             wpa_s->last_scan_res_used == 0)
 944                 return NULL; /* no scan results from last update */
 945
 946         while (selected == NULL) {
 947                 for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 948                         selected = wpa_supplicant_select_bss(
 949                                 wpa_s, wpa_s->conf->pssid[prio],
 950                                 selected_ssid);
 951                         if (selected)
 952                                 break;
 953                 }
 954
 955                 if (selected == NULL && wpa_s->blacklist &&
 956                     !wpa_s->countermeasures) {
 957                         wpa_dbg(wpa_s, MSG_DEBUG, "No APs found - clear "
 958                                 "blacklist and try again");
 959                         wpa_blacklist_clear(wpa_s);
 960                         wpa_s->blacklist_cleared++;
 961                 } else if (selected == NULL)
 962                         break;
 963         }
 964
 965         return selected;
 966 }
 967
 968
 969 static void wpa_supplicant_req_new_scan(struct wpa_supplicant *wpa_s,
 970                                         int timeout_sec, int timeout_usec)
 971 {
 972         if (!wpa_supplicant_enabled_networks(wpa_s)) {
 973                 /*
 974                  * No networks are enabled; short-circuit request so
 975                  * we don't wait timeout seconds before transitioning
 976                  * to INACTIVE state.
 977                  */
 978                 wpa_dbg(wpa_s, MSG_DEBUG, "Short-circuit new scan request "
 979                         "since there are no enabled networks");
 980                 wpa_supplicant_set_state(wpa_s, WPA_INACTIVE);
 981 #ifdef CONFIG_P2P
 982                 wpa_s->sta_scan_pending = 0;
 983 #endif /* CONFIG_P2P */
 984                 return;
 985         }
 986
 987         wpa_s->scan_for_connection = 1;
 988         wpa_supplicant_req_scan(wpa_s, timeout_sec, timeout_usec);
 989 }
 990
 991
 992 int wpa_supplicant_connect(struct wpa_supplicant *wpa_s,
 993                            struct wpa_bss *selected,
 994                            struct wpa_ssid *ssid)
 995 {
 996         if (wpas_wps_scan_pbc_overlap(wpa_s, selected, ssid)) {
 997                 wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_OVERLAP
 998                         "PBC session overlap");
 999 #ifdef CONFIG_P2P
1000                 if (wpas_p2p_notif_pbc_overlap(wpa_s) == 1)
1001                         return -1;
1002 #endif /* CONFIG_P2P */
1003
1004 #ifdef CONFIG_WPS
1005                 wpas_wps_cancel(wpa_s);
1006 #endif /* CONFIG_WPS */
1007                 return -1;
1008         }
1009
1010         wpa_msg(wpa_s, MSG_DEBUG,
1011                 "Considering connect request: reassociate: %d  selected: "
1012                 MACSTR "  bssid: " MACSTR "  pending: " MACSTR
1013                 "  wpa_state: %s  ssid=%p  current_ssid=%p",
1014                 wpa_s->reassociate, MAC2STR(selected->bssid),
1015                 MAC2STR(wpa_s->bssid), MAC2STR(wpa_s->pending_bssid),
1016                 wpa_supplicant_state_txt(wpa_s->wpa_state),
1017                 ssid, wpa_s->current_ssid);
1018
1019         /*
1020          * Do not trigger new association unless the BSSID has changed or if
1021          * reassociation is requested. If we are in process of associating with
1022          * the selected BSSID, do not trigger new attempt.
1023          */
1024         if (wpa_s->reassociate ||
1025             (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
1026              ((wpa_s->wpa_state != WPA_ASSOCIATING &&
1027                wpa_s->wpa_state != WPA_AUTHENTICATING) ||
1028               (!is_zero_ether_addr(wpa_s->pending_bssid) &&
1029                os_memcmp(selected->bssid, wpa_s->pending_bssid, ETH_ALEN) !=
1030                0) ||
1031               (is_zero_ether_addr(wpa_s->pending_bssid) &&
1032                ssid != wpa_s->current_ssid)))) {
1033                 if (wpa_supplicant_scard_init(wpa_s, ssid)) {
1034                         wpa_supplicant_req_new_scan(wpa_s, 10, 0);
1035                         return 0;
1036                 }
1037                 wpa_msg(wpa_s, MSG_DEBUG, "Request association with " MACSTR,
1038                         MAC2STR(selected->bssid));
1039                 wpa_supplicant_associate(wpa_s, selected, ssid);
1040         } else {
1041                 wpa_dbg(wpa_s, MSG_DEBUG, "Already associated or trying to "
1042                         "connect with the selected AP");
1043         }
1044
1045         return 0;
1046 }
1047
1048
1049 static struct wpa_ssid *
1050 wpa_supplicant_pick_new_network(struct wpa_supplicant *wpa_s)
1051 {
1052         int prio;
1053         struct wpa_ssid *ssid;
1054
1055         for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
1056                 for (ssid = wpa_s->conf->pssid[prio]; ssid; ssid = ssid->pnext)
1057                 {
1058                         if (wpas_network_disabled(wpa_s, ssid))
1059                                 continue;
1060                         if (ssid->mode == IEEE80211_MODE_IBSS ||
1061                             ssid->mode == IEEE80211_MODE_AP)
1062                                 return ssid;
1063                 }
1064         }
1065         return NULL;
1066 }
1067
1068
1069 /* TODO: move the rsn_preauth_scan_result*() to be called from notify.c based
1070  * on BSS added and BSS changed events */
1071 static void wpa_supplicant_rsn_preauth_scan_results(
1072         struct wpa_supplicant *wpa_s)
1073 {
1074         struct wpa_bss *bss;
1075
1076         if (rsn_preauth_scan_results(wpa_s->wpa) < 0)
1077                 return;
1078
1079         dl_list_for_each(bss, &wpa_s->bss, struct wpa_bss, list) {
1080                 const u8 *ssid, *rsn;
1081
1082                 ssid = wpa_bss_get_ie(bss, WLAN_EID_SSID);
1083                 if (ssid == NULL)
1084                         continue;
1085
1086                 rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
1087                 if (rsn == NULL)
1088                         continue;
1089
1090                 rsn_preauth_scan_result(wpa_s->wpa, bss->bssid, ssid, rsn);
1091         }
1092
1093 }
1094
1095
1096 static int wpa_supplicant_need_to_roam(struct wpa_supplicant *wpa_s,
1097                                        struct wpa_bss *selected,
1098                                        struct wpa_ssid *ssid)
1099 {
1100         struct wpa_bss *current_bss = NULL;
1101         int min_diff;
1102
1103         if (wpa_s->reassociate)
1104                 return 1; /* explicit request to reassociate */
1105         if (wpa_s->wpa_state < WPA_ASSOCIATED)
1106                 return 1; /* we are not associated; continue */
1107         if (wpa_s->current_ssid == NULL)
1108                 return 1; /* unknown current SSID */
1109         if (wpa_s->current_ssid != ssid)
1110                 return 1; /* different network block */
1111
1112         if (wpas_driver_bss_selection(wpa_s))
1113                 return 0; /* Driver-based roaming */
1114
1115         if (wpa_s->current_ssid->ssid)
1116                 current_bss = wpa_bss_get(wpa_s, wpa_s->bssid,
1117                                           wpa_s->current_ssid->ssid,
1118                                           wpa_s->current_ssid->ssid_len);
1119         if (!current_bss)
1120                 current_bss = wpa_bss_get_bssid(wpa_s, wpa_s->bssid);
1121
1122         if (!current_bss)
1123                 return 1; /* current BSS not seen in scan results */
1124
1125         if (current_bss == selected)
1126                 return 0;
1127
1128         if (selected->last_update_idx > current_bss->last_update_idx)
1129                 return 1; /* current BSS not seen in the last scan */
1130
1131 #ifndef CONFIG_NO_ROAMING
1132         wpa_dbg(wpa_s, MSG_DEBUG, "Considering within-ESS reassociation");
1133         wpa_dbg(wpa_s, MSG_DEBUG, "Current BSS: " MACSTR " level=%d",
1134                 MAC2STR(current_bss->bssid), current_bss->level);
1135         wpa_dbg(wpa_s, MSG_DEBUG, "Selected BSS: " MACSTR " level=%d",
1136                 MAC2STR(selected->bssid), selected->level);
1137
1138         if (wpa_s->current_ssid->bssid_set &&
1139             os_memcmp(selected->bssid, wpa_s->current_ssid->bssid, ETH_ALEN) ==
1140             0) {
1141                 wpa_dbg(wpa_s, MSG_DEBUG, "Allow reassociation - selected BSS "
1142                         "has preferred BSSID");
1143                 return 1;
1144         }
1145
1146         if (current_bss->level < 0 && current_bss->level > selected->level) {
1147                 wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - Current BSS has better "
1148                         "signal level");
1149                 return 0;
1150         }
1151
1152         min_diff = 2;
1153         if (current_bss->level < 0) {
1154                 if (current_bss->level < -85)
1155                         min_diff = 1;
1156                 else if (current_bss->level < -80)
1157                         min_diff = 2;
1158                 else if (current_bss->level < -75)
1159                         min_diff = 3;
1160                 else if (current_bss->level < -70)
1161                         min_diff = 4;
1162                 else
1163                         min_diff = 5;
1164         }
1165         if (abs(current_bss->level - selected->level) < min_diff) {
1166                 wpa_dbg(wpa_s, MSG_DEBUG, "Skip roam - too small difference "
1167                         "in signal level");
1168                 return 0;
1169         }
1170
1171         return 1;
1172 #else /* CONFIG_NO_ROAMING */
1173         return 0;
1174 #endif /* CONFIG_NO_ROAMING */
1175 }
1176
1177
1178 /* Return != 0 if no scan results could be fetched or if scan results should not
1179  * be shared with other virtual interfaces. */
1180 static int _wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
1181                                               union wpa_event_data *data,
1182                                               int own_request)
1183 {
1184         struct wpa_scan_results *scan_res = NULL;
1185         int ret = 0;
1186         int ap = 0;
1187 #ifndef CONFIG_NO_RANDOM_POOL
1188         size_t i, num;
1189 #endif /* CONFIG_NO_RANDOM_POOL */
1190
1191 #ifdef CONFIG_AP
1192         if (wpa_s->ap_iface)
1193                 ap = 1;
1194 #endif /* CONFIG_AP */
1195
1196         wpa_supplicant_notify_scanning(wpa_s, 0);
1197
1198 #ifdef CONFIG_P2P
1199         if (own_request && wpa_s->global->p2p_cb_on_scan_complete &&
1200             !wpa_s->global->p2p_disabled &&
1201             wpa_s->global->p2p != NULL && !wpa_s->sta_scan_pending &&
1202             !wpa_s->scan_res_handler) {
1203                 wpa_s->global->p2p_cb_on_scan_complete = 0;
1204                 if (p2p_other_scan_completed(wpa_s->global->p2p) == 1) {
1205                         wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Pending P2P operation "
1206                                 "stopped scan processing");
1207                         wpa_s->scan_req = wpa_s->last_scan_req;
1208                         wpa_s->sta_scan_pending = 1;
1209                         wpa_supplicant_req_scan(wpa_s, 5, 0);
1210                         ret = -1;
1211                         goto scan_work_done;
1212                 }
1213         }
1214         wpa_s->sta_scan_pending = 0;
1215 #endif /* CONFIG_P2P */
1216
1217         scan_res = wpa_supplicant_get_scan_results(wpa_s,
1218                                                    data ? &data->scan_info :
1219                                                    NULL, 1);
1220         if (scan_res == NULL) {
1221                 if (wpa_s->conf->ap_scan == 2 || ap ||
1222                     wpa_s->scan_res_handler == scan_only_handler)
1223                         return -1;
1224                 if (!own_request)
1225                         return -1;
1226                 wpa_dbg(wpa_s, MSG_DEBUG, "Failed to get scan results - try "
1227                         "scanning again");
1228                 wpa_supplicant_req_new_scan(wpa_s, 1, 0);
1229                 ret = -1;
1230                 goto scan_work_done;
1231         }
1232
1233 #ifndef CONFIG_NO_RANDOM_POOL
1234         num = scan_res->num;
1235         if (num > 10)
1236                 num = 10;
1237         for (i = 0; i < num; i++) {
1238                 u8 buf[5];
1239                 struct wpa_scan_res *res = scan_res->res[i];
1240                 buf[0] = res->bssid[5];
1241                 buf[1] = res->qual & 0xff;
1242                 buf[2] = res->noise & 0xff;
1243                 buf[3] = res->level & 0xff;
1244                 buf[4] = res->tsf & 0xff;
1245                 random_add_randomness(buf, sizeof(buf));
1246         }
1247 #endif /* CONFIG_NO_RANDOM_POOL */
1248
1249         if (own_request && wpa_s->scan_res_handler &&
1250             (wpa_s->own_scan_running || !wpa_s->external_scan_running)) {
1251                 void (*scan_res_handler)(struct wpa_supplicant *wpa_s,
1252                                          struct wpa_scan_results *scan_res);
1253
1254                 scan_res_handler = wpa_s->scan_res_handler;
1255                 wpa_s->scan_res_handler = NULL;
1256                 scan_res_handler(wpa_s, scan_res);
1257                 ret = -2;
1258                 goto scan_work_done;
1259         }
1260
1261         if (ap) {
1262                 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore scan results in AP mode");
1263 #ifdef CONFIG_AP
1264                 if (wpa_s->ap_iface->scan_cb)
1265                         wpa_s->ap_iface->scan_cb(wpa_s->ap_iface);
1266 #endif /* CONFIG_AP */
1267                 goto scan_work_done;
1268         }
1269
1270         wpa_dbg(wpa_s, MSG_DEBUG, "New scan results available (own=%u ext=%u)",
1271                 wpa_s->own_scan_running, wpa_s->external_scan_running);
1272         if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
1273             wpa_s->manual_scan_use_id && wpa_s->own_scan_running) {
1274                 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS "id=%u",
1275                              wpa_s->manual_scan_id);
1276                 wpa_s->manual_scan_use_id = 0;
1277         } else {
1278                 wpa_msg_ctrl(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
1279         }
1280         wpas_notify_scan_results(wpa_s);
1281
1282         wpas_notify_scan_done(wpa_s, 1);
1283
1284         if (!wpa_s->own_scan_running && wpa_s->external_scan_running) {
1285                 wpa_dbg(wpa_s, MSG_DEBUG, "Do not use results from externally requested scan operation for network selection");
1286                 wpa_scan_results_free(scan_res);
1287                 return 0;
1288         }
1289
1290         if (sme_proc_obss_scan(wpa_s) > 0)
1291                 goto scan_work_done;
1292
1293         if ((wpa_s->conf->ap_scan == 2 && !wpas_wps_searching(wpa_s)))
1294                 goto scan_work_done;
1295
1296         if (autoscan_notify_scan(wpa_s, scan_res))
1297                 goto scan_work_done;
1298
1299         if (wpa_s->disconnected) {
1300                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
1301                 goto scan_work_done;
1302         }
1303
1304         if (!wpas_driver_bss_selection(wpa_s) &&
1305             bgscan_notify_scan(wpa_s, scan_res) == 1)
1306                 goto scan_work_done;
1307
1308         wpas_wps_update_ap_info(wpa_s, scan_res);
1309
1310         wpa_scan_results_free(scan_res);
1311
1312         if (wpa_s->scan_work) {
1313                 struct wpa_radio_work *work = wpa_s->scan_work;
1314                 wpa_s->scan_work = NULL;
1315                 radio_work_done(work);
1316         }
1317
1318         return wpas_select_network_from_last_scan(wpa_s, 1, own_request);
1319
1320 scan_work_done:
1321         wpa_scan_results_free(scan_res);
1322         if (wpa_s->scan_work) {
1323                 struct wpa_radio_work *work = wpa_s->scan_work;
1324                 wpa_s->scan_work = NULL;
1325                 radio_work_done(work);
1326         }
1327         return ret;
1328 }
1329
1330
1331 static int wpas_select_network_from_last_scan(struct wpa_supplicant *wpa_s,
1332                                               int new_scan, int own_request)
1333 {
1334         struct wpa_bss *selected;
1335         struct wpa_ssid *ssid = NULL;
1336
1337         selected = wpa_supplicant_pick_network(wpa_s, &ssid);
1338
1339         if (selected) {
1340                 int skip;
1341                 skip = !wpa_supplicant_need_to_roam(wpa_s, selected, ssid);
1342                 if (skip) {
1343                         if (new_scan)
1344                                 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
1345                         return 0;
1346                 }
1347
1348                 if (wpa_supplicant_connect(wpa_s, selected, ssid) < 0) {
1349                         wpa_dbg(wpa_s, MSG_DEBUG, "Connect failed");
1350                         return -1;
1351                 }
1352                 if (new_scan)
1353                         wpa_supplicant_rsn_preauth_scan_results(wpa_s);
1354                 /*
1355                  * Do not notify other virtual radios of scan results since we do not
1356                  * want them to start other associations at the same time.
1357                  */
1358                 return 1;
1359         } else {
1360                 wpa_dbg(wpa_s, MSG_DEBUG, "No suitable network found");
1361                 ssid = wpa_supplicant_pick_new_network(wpa_s);
1362                 if (ssid) {
1363                         wpa_dbg(wpa_s, MSG_DEBUG, "Setup a new network");
1364                         wpa_supplicant_associate(wpa_s, NULL, ssid);
1365                         if (new_scan)
1366                                 wpa_supplicant_rsn_preauth_scan_results(wpa_s);
1367                 } else if (own_request) {
1368                         /*
1369                          * No SSID found. If SCAN results are as a result of
1370                          * own scan request and not due to a scan request on
1371                          * another shared interface, try another scan.
1372                          */
1373                         int timeout_sec = wpa_s->scan_interval;
1374                         int timeout_usec = 0;
1375 #ifdef CONFIG_P2P
1376                         if (wpas_p2p_scan_no_go_seen(wpa_s) == 1)
1377                                 return 0;
1378
1379                         if (wpa_s->p2p_in_provisioning ||
1380                             wpa_s->show_group_started) {
1381                                 /*
1382                                  * Use shorter wait during P2P Provisioning
1383                                  * state and during P2P join-a-group operation
1384                                  * to speed up group formation.
1385                                  */
1386                                 timeout_sec = 0;
1387                                 timeout_usec = 250000;
1388                                 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
1389                                                             timeout_usec);
1390                                 return 0;
1391                         }
1392 #endif /* CONFIG_P2P */
1393 #ifdef CONFIG_INTERWORKING
1394                         if (wpa_s->conf->auto_interworking &&
1395                             wpa_s->conf->interworking &&
1396                             wpa_s->conf->cred) {
1397                                 wpa_dbg(wpa_s, MSG_DEBUG, "Interworking: "
1398                                         "start ANQP fetch since no matching "
1399                                         "networks found");
1400                                 wpa_s->network_select = 1;
1401                                 wpa_s->auto_network_select = 1;
1402                                 interworking_start_fetch_anqp(wpa_s);
1403                                 return 1;
1404                         }
1405 #endif /* CONFIG_INTERWORKING */
1406 #ifdef CONFIG_WPS
1407                         if (wpa_s->after_wps > 0 || wpas_wps_searching(wpa_s)) {
1408                                 wpa_dbg(wpa_s, MSG_DEBUG, "Use shorter wait during WPS processing");
1409                                 timeout_sec = 0;
1410                                 timeout_usec = 500000;
1411                                 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
1412                                                             timeout_usec);
1413                                 return 0;
1414                         }
1415 #endif /* CONFIG_WPS */
1416                         if (wpa_supplicant_req_sched_scan(wpa_s))
1417                                 wpa_supplicant_req_new_scan(wpa_s, timeout_sec,
1418                                                             timeout_usec);
1419                 }
1420         }
1421         return 0;
1422 }
1423
1424
1425 static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s,
1426                                               union wpa_event_data *data)
1427 {
1428         struct wpa_supplicant *ifs;
1429
1430         if (_wpa_supplicant_event_scan_results(wpa_s, data, 1) != 0) {
1431                 /*
1432                  * If no scan results could be fetched, then no need to
1433                  * notify those interfaces that did not actually request
1434                  * this scan. Similarly, if scan results started a new operation on this
1435                  * interface, do not notify other interfaces to avoid concurrent
1436                  * operations during a connection attempt.
1437                  */
1438                 return;
1439         }
1440
1441         /*
1442          * Check other interfaces to see if they share the same radio. If
1443          * so, they get updated with this same scan info.
1444          */
1445         dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant,
1446                          radio_list) {
1447                 if (ifs != wpa_s) {
1448                         wpa_printf(MSG_DEBUG, "%s: Updating scan results from "
1449                                    "sibling", ifs->ifname);
1450                         _wpa_supplicant_event_scan_results(ifs, data, 0);
1451                 }
1452         }
1453 }
1454
1455 #endif /* CONFIG_NO_SCAN_PROCESSING */
1456
1457
1458 int wpa_supplicant_fast_associate(struct wpa_supplicant *wpa_s)
1459 {
1460 #ifdef CONFIG_NO_SCAN_PROCESSING
1461         return -1;
1462 #else /* CONFIG_NO_SCAN_PROCESSING */
1463         struct os_reltime now;
1464
1465         if (wpa_s->last_scan_res_used <= 0)
1466                 return -1;
1467
1468         os_get_reltime(&now);
1469         if (os_reltime_expired(&now, &wpa_s->last_scan, 5)) {
1470                 wpa_printf(MSG_DEBUG, "Fast associate: Old scan results");
1471                 return -1;
1472         }
1473
1474         return wpas_select_network_from_last_scan(wpa_s, 0, 1);
1475 #endif /* CONFIG_NO_SCAN_PROCESSING */
1476 }
1477
1478 #ifdef CONFIG_WNM
1479
1480 static void wnm_bss_keep_alive(void *eloop_ctx, void *sock_ctx)
1481 {
1482         struct wpa_supplicant *wpa_s = eloop_ctx;
1483
1484         if (wpa_s->wpa_state < WPA_ASSOCIATED)
1485                 return;
1486
1487         if (!wpa_s->no_keep_alive) {
1488                 wpa_printf(MSG_DEBUG, "WNM: Send keep-alive to AP " MACSTR,
1489                            MAC2STR(wpa_s->bssid));
1490                 /* TODO: could skip this if normal data traffic has been sent */
1491                 /* TODO: Consider using some more appropriate data frame for
1492                  * this */
1493                 if (wpa_s->l2)
1494                         l2_packet_send(wpa_s->l2, wpa_s->bssid, 0x0800,
1495                                        (u8 *) "", 0);
1496         }
1497
1498 #ifdef CONFIG_SME
1499         if (wpa_s->sme.bss_max_idle_period) {
1500                 unsigned int msec;
1501                 msec = wpa_s->sme.bss_max_idle_period * 1024; /* times 1000 */
1502                 if (msec > 100)
1503                         msec -= 100;
1504                 eloop_register_timeout(msec / 1000, msec % 1000 * 1000,
1505                                        wnm_bss_keep_alive, wpa_s, NULL);
1506         }
1507 #endif /* CONFIG_SME */
1508 }
1509
1510
1511 static void wnm_process_assoc_resp(struct wpa_supplicant *wpa_s,
1512                                    const u8 *ies, size_t ies_len)
1513 {
1514         struct ieee802_11_elems elems;
1515
1516         if (ies == NULL)
1517                 return;
1518
1519         if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed)
1520                 return;
1521
1522 #ifdef CONFIG_SME
1523         if (elems.bss_max_idle_period) {
1524                 unsigned int msec;
1525                 wpa_s->sme.bss_max_idle_period =
1526                         WPA_GET_LE16(elems.bss_max_idle_period);
1527                 wpa_printf(MSG_DEBUG, "WNM: BSS Max Idle Period: %u (* 1000 "
1528                            "TU)%s", wpa_s->sme.bss_max_idle_period,
1529                            (elems.bss_max_idle_period[2] & 0x01) ?
1530                            " (protected keep-live required)" : "");
1531                 if (wpa_s->sme.bss_max_idle_period == 0)
1532                         wpa_s->sme.bss_max_idle_period = 1;
1533                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) {
1534                         eloop_cancel_timeout(wnm_bss_keep_alive, wpa_s, NULL);
1535                          /* msec times 1000 */
1536                         msec = wpa_s->sme.bss_max_idle_period * 1024;
1537                         if (msec > 100)
1538                                 msec -= 100;
1539                         eloop_register_timeout(msec / 1000, msec % 1000 * 1000,
1540                                                wnm_bss_keep_alive, wpa_s,
1541                                                NULL);
1542                 }
1543         }
1544 #endif /* CONFIG_SME */
1545 }
1546
1547 #endif /* CONFIG_WNM */
1548
1549
1550 void wnm_bss_keep_alive_deinit(struct wpa_supplicant *wpa_s)
1551 {
1552 #ifdef CONFIG_WNM
1553         eloop_cancel_timeout(wnm_bss_keep_alive, wpa_s, NULL);
1554 #endif /* CONFIG_WNM */
1555 }
1556
1557
1558 #ifdef CONFIG_INTERWORKING
1559
1560 static int wpas_qos_map_set(struct wpa_supplicant *wpa_s, const u8 *qos_map,
1561                             size_t len)
1562 {
1563         int res;
1564
1565         wpa_hexdump(MSG_DEBUG, "Interworking: QoS Map Set", qos_map, len);
1566         res = wpa_drv_set_qos_map(wpa_s, qos_map, len);
1567         if (res) {
1568                 wpa_printf(MSG_DEBUG, "Interworking: Failed to configure QoS Map Set to the driver");
1569         }
1570
1571         return res;
1572 }
1573
1574
1575 static void interworking_process_assoc_resp(struct wpa_supplicant *wpa_s,
1576                                             const u8 *ies, size_t ies_len)
1577 {
1578         struct ieee802_11_elems elems;
1579
1580         if (ies == NULL)
1581                 return;
1582
1583         if (ieee802_11_parse_elems(ies, ies_len, &elems, 1) == ParseFailed)
1584                 return;
1585
1586         if (elems.qos_map_set) {
1587                 wpas_qos_map_set(wpa_s, elems.qos_map_set,
1588                                  elems.qos_map_set_len);
1589         }
1590 }
1591
1592 #endif /* CONFIG_INTERWORKING */
1593
1594
1595 static int wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
1596                                           union wpa_event_data *data)
1597 {
1598         int l, len, found = 0, wpa_found, rsn_found;
1599         const u8 *p;
1600 #ifdef CONFIG_IEEE80211R
1601         u8 bssid[ETH_ALEN];
1602 #endif /* CONFIG_IEEE80211R */
1603
1604         wpa_dbg(wpa_s, MSG_DEBUG, "Association info event");
1605         if (data->assoc_info.req_ies)
1606                 wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
1607                             data->assoc_info.req_ies_len);
1608         if (data->assoc_info.resp_ies) {
1609                 wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
1610                             data->assoc_info.resp_ies_len);
1611 #ifdef CONFIG_TDLS
1612                 wpa_tdls_assoc_resp_ies(wpa_s->wpa, data->assoc_info.resp_ies,
1613                                         data->assoc_info.resp_ies_len);
1614 #endif /* CONFIG_TDLS */
1615 #ifdef CONFIG_WNM
1616                 wnm_process_assoc_resp(wpa_s, data->assoc_info.resp_ies,
1617                                        data->assoc_info.resp_ies_len);
1618 #endif /* CONFIG_WNM */
1619 #ifdef CONFIG_INTERWORKING
1620                 interworking_process_assoc_resp(wpa_s, data->assoc_info.resp_ies,
1621                                                 data->assoc_info.resp_ies_len);
1622 #endif /* CONFIG_INTERWORKING */
1623         }
1624         if (data->assoc_info.beacon_ies)
1625                 wpa_hexdump(MSG_DEBUG, "beacon_ies",
1626                             data->assoc_info.beacon_ies,
1627                             data->assoc_info.beacon_ies_len);
1628         if (data->assoc_info.freq)
1629                 wpa_dbg(wpa_s, MSG_DEBUG, "freq=%u MHz",
1630                         data->assoc_info.freq);
1631
1632         p = data->assoc_info.req_ies;
1633         l = data->assoc_info.req_ies_len;
1634
1635         /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
1636         while (p && l >= 2) {
1637                 len = p[1] + 2;
1638                 if (len > l) {
1639                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1640                                     p, l);
1641                         break;
1642                 }
1643                 if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1644                      (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
1645                     (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
1646                         if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
1647                                 break;
1648                         found = 1;
1649                         wpa_find_assoc_pmkid(wpa_s);
1650                         break;
1651                 }
1652                 l -= len;
1653                 p += len;
1654         }
1655         if (!found && data->assoc_info.req_ies)
1656                 wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
1657
1658 #ifdef CONFIG_IEEE80211R
1659 #ifdef CONFIG_SME
1660         if (wpa_s->sme.auth_alg == WPA_AUTH_ALG_FT) {
1661                 if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
1662                     wpa_ft_validate_reassoc_resp(wpa_s->wpa,
1663                                                  data->assoc_info.resp_ies,
1664                                                  data->assoc_info.resp_ies_len,
1665                                                  bssid) < 0) {
1666                         wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
1667                                 "Reassociation Response failed");
1668                         wpa_supplicant_deauthenticate(
1669                                 wpa_s, WLAN_REASON_INVALID_IE);
1670                         return -1;
1671                 }
1672         }
1673
1674         p = data->assoc_info.resp_ies;
1675         l = data->assoc_info.resp_ies_len;
1676
1677 #ifdef CONFIG_WPS_STRICT
1678         if (p && wpa_s->current_ssid &&
1679             wpa_s->current_ssid->key_mgmt == WPA_KEY_MGMT_WPS) {
1680                 struct wpabuf *wps;
1681                 wps = ieee802_11_vendor_ie_concat(p, l, WPS_IE_VENDOR_TYPE);
1682                 if (wps == NULL) {
1683                         wpa_msg(wpa_s, MSG_INFO, "WPS-STRICT: AP did not "
1684                                 "include WPS IE in (Re)Association Response");
1685                         return -1;
1686                 }
1687
1688                 if (wps_validate_assoc_resp(wps) < 0) {
1689                         wpabuf_free(wps);
1690                         wpa_supplicant_deauthenticate(
1691                                 wpa_s, WLAN_REASON_INVALID_IE);
1692                         return -1;
1693                 }
1694                 wpabuf_free(wps);
1695         }
1696 #endif /* CONFIG_WPS_STRICT */
1697
1698         /* Go through the IEs and make a copy of the MDIE, if present. */
1699         while (p && l >= 2) {
1700                 len = p[1] + 2;
1701                 if (len > l) {
1702                         wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
1703                                     p, l);
1704                         break;
1705                 }
1706                 if (p[0] == WLAN_EID_MOBILITY_DOMAIN &&
1707                     p[1] >= MOBILITY_DOMAIN_ID_LEN) {
1708                         wpa_s->sme.ft_used = 1;
1709                         os_memcpy(wpa_s->sme.mobility_domain, p + 2,
1710                                   MOBILITY_DOMAIN_ID_LEN);
1711                         break;
1712                 }
1713                 l -= len;
1714                 p += len;
1715         }
1716 #endif /* CONFIG_SME */
1717
1718         /* Process FT when SME is in the driver */
1719         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) &&
1720             wpa_ft_is_completed(wpa_s->wpa)) {
1721                 if (wpa_drv_get_bssid(wpa_s, bssid) < 0 ||
1722                     wpa_ft_validate_reassoc_resp(wpa_s->wpa,
1723                                                  data->assoc_info.resp_ies,
1724                                                  data->assoc_info.resp_ies_len,
1725                                                  bssid) < 0) {
1726                         wpa_dbg(wpa_s, MSG_DEBUG, "FT: Validation of "
1727                                 "Reassociation Response failed");
1728                         wpa_supplicant_deauthenticate(
1729                                 wpa_s, WLAN_REASON_INVALID_IE);
1730                         return -1;
1731                 }
1732                 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Reassociation Response done");
1733         }
1734
1735         wpa_sm_set_ft_params(wpa_s->wpa, data->assoc_info.resp_ies,
1736                              data->assoc_info.resp_ies_len);
1737 #endif /* CONFIG_IEEE80211R */
1738
1739         /* WPA/RSN IE from Beacon/ProbeResp */
1740         p = data->assoc_info.beacon_ies;
1741         l = data->assoc_info.beacon_ies_len;
1742
1743         /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
1744          */
1745         wpa_found = rsn_found = 0;
1746         while (p && l >= 2) {
1747                 len = p[1] + 2;
1748                 if (len > l) {
1749                         wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
1750                                     p, l);
1751                         break;
1752                 }
1753                 if (!wpa_found &&
1754                     p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
1755                     os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
1756                         wpa_found = 1;
1757                         wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
1758                 }
1759
1760                 if (!rsn_found &&
1761                     p[0] == WLAN_EID_RSN && p[1] >= 2) {
1762                         rsn_found = 1;
1763                         wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
1764                 }
1765
1766                 l -= len;
1767                 p += len;
1768         }
1769
1770         if (!wpa_found && data->assoc_info.beacon_ies)
1771                 wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
1772         if (!rsn_found && data->assoc_info.beacon_ies)
1773                 wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
1774         if (wpa_found || rsn_found)
1775                 wpa_s->ap_ies_from_associnfo = 1;
1776
1777         if (wpa_s->assoc_freq && data->assoc_info.freq &&
1778             wpa_s->assoc_freq != data->assoc_info.freq) {
1779                 wpa_printf(MSG_DEBUG, "Operating frequency changed from "
1780                            "%u to %u MHz",
1781                            wpa_s->assoc_freq, data->assoc_info.freq);
1782                 wpa_supplicant_update_scan_results(wpa_s);
1783         }
1784
1785         wpa_s->assoc_freq = data->assoc_info.freq;
1786
1787         return 0;
1788 }
1789
1790
1791 static struct wpa_bss * wpa_supplicant_get_new_bss(
1792         struct wpa_supplicant *wpa_s, const u8 *bssid)
1793 {
1794         struct wpa_bss *bss = NULL;
1795         struct wpa_ssid *ssid = wpa_s->current_ssid;
1796
1797         if (ssid->ssid_len > 0)
1798                 bss = wpa_bss_get(wpa_s, bssid, ssid->ssid, ssid->ssid_len);
1799         if (!bss)
1800                 bss = wpa_bss_get_bssid(wpa_s, bssid);
1801
1802         return bss;
1803 }
1804
1805
1806 static int wpa_supplicant_assoc_update_ie(struct wpa_supplicant *wpa_s)
1807 {
1808         const u8 *bss_wpa = NULL, *bss_rsn = NULL;
1809
1810         if (!wpa_s->current_bss || !wpa_s->current_ssid)
1811                 return -1;
1812
1813         if (!wpa_key_mgmt_wpa_any(wpa_s->current_ssid->key_mgmt))
1814                 return 0;
1815
1816         bss_wpa = wpa_bss_get_vendor_ie(wpa_s->current_bss,
1817                                         WPA_IE_VENDOR_TYPE);
1818         bss_rsn = wpa_bss_get_ie(wpa_s->current_bss, WLAN_EID_RSN);
1819
1820         if (wpa_sm_set_ap_wpa_ie(wpa_s->wpa, bss_wpa,
1821                                  bss_wpa ? 2 + bss_wpa[1] : 0) ||
1822             wpa_sm_set_ap_rsn_ie(wpa_s->wpa, bss_rsn,
1823                                  bss_rsn ? 2 + bss_rsn[1] : 0))
1824                 return -1;
1825
1826         return 0;
1827 }
1828
1829
1830 static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
1831                                        union wpa_event_data *data)
1832 {
1833         u8 bssid[ETH_ALEN];
1834         int ft_completed;
1835
1836 #ifdef CONFIG_AP
1837         if (wpa_s->ap_iface) {
1838                 hostapd_notif_assoc(wpa_s->ap_iface->bss[0],
1839                                     data->assoc_info.addr,
1840                                     data->assoc_info.req_ies,
1841                                     data->assoc_info.req_ies_len,
1842                                     data->assoc_info.reassoc);
1843                 return;
1844         }
1845 #endif /* CONFIG_AP */
1846
1847         ft_completed = wpa_ft_is_completed(wpa_s->wpa);
1848         if (data && wpa_supplicant_event_associnfo(wpa_s, data) < 0)
1849                 return;
1850
1851         if (wpa_drv_get_bssid(wpa_s, bssid) < 0) {
1852                 wpa_dbg(wpa_s, MSG_ERROR, "Failed to get BSSID");
1853                 wpa_supplicant_deauthenticate(
1854                         wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1855                 return;
1856         }
1857
1858         wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
1859         if (os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0) {
1860                 wpa_dbg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
1861                         MACSTR, MAC2STR(bssid));
1862                 random_add_randomness(bssid, ETH_ALEN);
1863                 os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
1864                 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
1865                 wpas_notify_bssid_changed(wpa_s);
1866
1867                 if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
1868                         wpa_clear_keys(wpa_s, bssid);
1869                 }
1870                 if (wpa_supplicant_select_config(wpa_s) < 0) {
1871                         wpa_supplicant_deauthenticate(
1872                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
1873                         return;
1874                 }
1875                 if (wpa_s->current_ssid) {
1876                         struct wpa_bss *bss = NULL;
1877
1878                         bss = wpa_supplicant_get_new_bss(wpa_s, bssid);
1879                         if (!bss) {
1880                                 wpa_supplicant_update_scan_results(wpa_s);
1881
1882                                 /* Get the BSS from the new scan results */
1883                                 bss = wpa_supplicant_get_new_bss(wpa_s, bssid);
1884                         }
1885
1886                         if (bss)
1887                                 wpa_s->current_bss = bss;
1888                 }
1889
1890                 if (wpa_s->conf->ap_scan == 1 &&
1891                     wpa_s->drv_flags & WPA_DRIVER_FLAGS_BSS_SELECTION) {
1892                         if (wpa_supplicant_assoc_update_ie(wpa_s) < 0)
1893                                 wpa_msg(wpa_s, MSG_WARNING,
1894                                         "WPA/RSN IEs not updated");
1895                 }
1896         }
1897
1898 #ifdef CONFIG_SME
1899         os_memcpy(wpa_s->sme.prev_bssid, bssid, ETH_ALEN);
1900         wpa_s->sme.prev_bssid_set = 1;
1901 #endif /* CONFIG_SME */
1902
1903         wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
1904         if (wpa_s->current_ssid) {
1905                 /* When using scanning (ap_scan=1), SIM PC/SC interface can be
1906                  * initialized before association, but for other modes,
1907                  * initialize PC/SC here, if the current configuration needs
1908                  * smartcard or SIM/USIM. */
1909                 wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
1910         }
1911         wpa_sm_notify_assoc(wpa_s->wpa, bssid);
1912         if (wpa_s->l2)
1913                 l2_packet_notify_auth_start(wpa_s->l2);
1914
1915         /*
1916          * Set portEnabled first to FALSE in order to get EAP state machine out
1917          * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
1918          * state machine may transit to AUTHENTICATING state based on obsolete
1919          * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
1920          * AUTHENTICATED without ever giving chance to EAP state machine to
1921          * reset the state.
1922          */
1923         if (!ft_completed) {
1924                 eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
1925                 eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
1926         }
1927         if (wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt) || ft_completed)
1928                 eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
1929         /* 802.1X::portControl = Auto */
1930         eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
1931         wpa_s->eapol_received = 0;
1932         if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
1933             wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE ||
1934             (wpa_s->current_ssid &&
1935              wpa_s->current_ssid->mode == IEEE80211_MODE_IBSS)) {
1936                 if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE &&
1937                     (wpa_s->drv_flags &
1938                      WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE)) {
1939                         /*
1940                          * Set the key after having received joined-IBSS event
1941                          * from the driver.
1942                          */
1943                         wpa_supplicant_set_wpa_none_key(wpa_s,
1944                                                         wpa_s->current_ssid);
1945                 }
1946                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1947                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1948         } else if (!ft_completed) {
1949                 /* Timeout for receiving the first EAPOL packet */
1950                 wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
1951         }
1952         wpa_supplicant_cancel_scan(wpa_s);
1953
1954         if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1955             wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt)) {
1956                 /*
1957                  * We are done; the driver will take care of RSN 4-way
1958                  * handshake.
1959                  */
1960                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1961                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1962                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1963                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1964         } else if ((wpa_s->drv_flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE) &&
1965                    wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt)) {
1966                 /*
1967                  * The driver will take care of RSN 4-way handshake, so we need
1968                  * to allow EAPOL supplicant to complete its work without
1969                  * waiting for WPA supplicant.
1970                  */
1971                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1972         } else if (ft_completed) {
1973                 /*
1974                  * FT protocol completed - make sure EAPOL state machine ends
1975                  * up in authenticated.
1976                  */
1977                 wpa_supplicant_cancel_auth_timeout(wpa_s);
1978                 wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
1979                 eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
1980                 eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
1981         }
1982
1983         wpa_s->last_eapol_matches_bssid = 0;
1984
1985         if (wpa_s->pending_eapol_rx) {
1986                 struct os_reltime now, age;
1987                 os_get_reltime(&now);
1988                 os_reltime_sub(&now, &wpa_s->pending_eapol_rx_time, &age);
1989                 if (age.sec == 0 && age.usec < 100000 &&
1990                     os_memcmp(wpa_s->pending_eapol_rx_src, bssid, ETH_ALEN) ==
1991                     0) {
1992                         wpa_dbg(wpa_s, MSG_DEBUG, "Process pending EAPOL "
1993                                 "frame that was received just before "
1994                                 "association notification");
1995                         wpa_supplicant_rx_eapol(
1996                                 wpa_s, wpa_s->pending_eapol_rx_src,
1997                                 wpabuf_head(wpa_s->pending_eapol_rx),
1998                                 wpabuf_len(wpa_s->pending_eapol_rx));
1999                 }
2000                 wpabuf_free(wpa_s->pending_eapol_rx);
2001                 wpa_s->pending_eapol_rx = NULL;
2002         }
2003
2004         if ((wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
2005              wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
2006             wpa_s->current_ssid &&
2007             (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE)) {
2008                 /* Set static WEP keys again */
2009                 wpa_set_wep_keys(wpa_s, wpa_s->current_ssid);
2010         }
2011
2012 #ifdef CONFIG_IBSS_RSN
2013         if (wpa_s->current_ssid &&
2014             wpa_s->current_ssid->mode == WPAS_MODE_IBSS &&
2015             wpa_s->key_mgmt != WPA_KEY_MGMT_NONE &&
2016             wpa_s->key_mgmt != WPA_KEY_MGMT_WPA_NONE &&
2017             wpa_s->ibss_rsn == NULL) {
2018                 wpa_s->ibss_rsn = ibss_rsn_init(wpa_s);
2019                 if (!wpa_s->ibss_rsn) {
2020                         wpa_msg(wpa_s, MSG_INFO, "Failed to init IBSS RSN");
2021                         wpa_supplicant_deauthenticate(
2022                                 wpa_s, WLAN_REASON_DEAUTH_LEAVING);
2023                         return;
2024                 }
2025
2026                 ibss_rsn_set_psk(wpa_s->ibss_rsn, wpa_s->current_ssid->psk);
2027         }
2028 #endif /* CONFIG_IBSS_RSN */
2029
2030         wpas_wps_notify_assoc(wpa_s, bssid);
2031 }
2032
2033
2034 static int disconnect_reason_recoverable(u16 reason_code)
2035 {
2036         return reason_code == WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY ||
2037                 reason_code == WLAN_REASON_CLASS2_FRAME_FROM_NONAUTH_STA ||
2038                 reason_code == WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA;
2039 }
2040
2041
2042 static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s,
2043                                           u16 reason_code,
2044                                           int locally_generated)
2045 {
2046         const u8 *bssid;
2047
2048         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
2049                 /*
2050                  * At least Host AP driver and a Prism3 card seemed to be
2051                  * generating streams of disconnected events when configuring
2052                  * IBSS for WPA-None. Ignore them for now.
2053                  */
2054                 return;
2055         }
2056
2057         bssid = wpa_s->bssid;
2058         if (is_zero_ether_addr(bssid))
2059                 bssid = wpa_s->pending_bssid;
2060
2061         if (!is_zero_ether_addr(bssid) ||
2062             wpa_s->wpa_state >= WPA_AUTHENTICATING) {
2063                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "bssid=" MACSTR
2064                         " reason=%d%s",
2065                         MAC2STR(bssid), reason_code,
2066                         locally_generated ? " locally_generated=1" : "");
2067         }
2068 }
2069
2070
2071 static int could_be_psk_mismatch(struct wpa_supplicant *wpa_s, u16 reason_code,
2072                                  int locally_generated)
2073 {
2074         if (wpa_s->wpa_state != WPA_4WAY_HANDSHAKE ||
2075             !wpa_key_mgmt_wpa_psk(wpa_s->key_mgmt))
2076                 return 0; /* Not in 4-way handshake with PSK */
2077
2078         /*
2079          * It looks like connection was lost while trying to go through PSK
2080          * 4-way handshake. Filter out known disconnection cases that are caused
2081          * by something else than PSK mismatch to avoid confusing reports.
2082          */
2083
2084         if (locally_generated) {
2085                 if (reason_code == WLAN_REASON_IE_IN_4WAY_DIFFERS)
2086                         return 0;
2087         }
2088
2089         return 1;
2090 }
2091
2092
2093 static void wpa_supplicant_event_disassoc_finish(struct wpa_supplicant *wpa_s,
2094                                                  u16 reason_code,
2095                                                  int locally_generated)
2096 {
2097         const u8 *bssid;
2098         int authenticating;
2099         u8 prev_pending_bssid[ETH_ALEN];
2100         struct wpa_bss *fast_reconnect = NULL;
2101 #ifndef CONFIG_NO_SCAN_PROCESSING
2102         struct wpa_ssid *fast_reconnect_ssid = NULL;
2103 #endif /* CONFIG_NO_SCAN_PROCESSING */
2104         struct wpa_ssid *last_ssid;
2105
2106         authenticating = wpa_s->wpa_state == WPA_AUTHENTICATING;
2107         os_memcpy(prev_pending_bssid, wpa_s->pending_bssid, ETH_ALEN);
2108
2109         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
2110                 /*
2111                  * At least Host AP driver and a Prism3 card seemed to be
2112                  * generating streams of disconnected events when configuring
2113                  * IBSS for WPA-None. Ignore them for now.
2114                  */
2115                 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - ignore in "
2116                         "IBSS/WPA-None mode");
2117                 return;
2118         }
2119
2120         if (could_be_psk_mismatch(wpa_s, reason_code, locally_generated)) {
2121                 wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
2122                         "pre-shared key may be incorrect");
2123                 if (wpas_p2p_4way_hs_failed(wpa_s) > 0)
2124                         return; /* P2P group removed */
2125                 wpas_auth_failed(wpa_s);
2126         }
2127         if (!wpa_s->disconnected &&
2128             (!wpa_s->auto_reconnect_disabled ||
2129              wpa_s->key_mgmt == WPA_KEY_MGMT_WPS)) {
2130                 wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect enabled: try to "
2131                         "reconnect (wps=%d wpa_state=%d)",
2132                         wpa_s->key_mgmt == WPA_KEY_MGMT_WPS,
2133                         wpa_s->wpa_state);
2134                 if (wpa_s->wpa_state == WPA_COMPLETED &&
2135                     wpa_s->current_ssid &&
2136                     wpa_s->current_ssid->mode == WPAS_MODE_INFRA &&
2137                     !locally_generated &&
2138                     disconnect_reason_recoverable(reason_code)) {
2139                         /*
2140                          * It looks like the AP has dropped association with
2141                          * us, but could allow us to get back in. Try to
2142                          * reconnect to the same BSS without full scan to save
2143                          * time for some common cases.
2144                          */
2145                         fast_reconnect = wpa_s->current_bss;
2146 #ifndef CONFIG_NO_SCAN_PROCESSING
2147                         fast_reconnect_ssid = wpa_s->current_ssid;
2148 #endif /* CONFIG_NO_SCAN_PROCESSING */
2149                 } else if (wpa_s->wpa_state >= WPA_ASSOCIATING)
2150                         wpa_supplicant_req_scan(wpa_s, 0, 100000);
2151                 else
2152                         wpa_dbg(wpa_s, MSG_DEBUG, "Do not request new "
2153                                 "immediate scan");
2154         } else {
2155                 wpa_dbg(wpa_s, MSG_DEBUG, "Auto connect disabled: do not "
2156                         "try to re-connect");
2157                 wpa_s->reassociate = 0;
2158                 wpa_s->disconnected = 1;
2159                 wpa_supplicant_cancel_sched_scan(wpa_s);
2160         }
2161         bssid = wpa_s->bssid;
2162         if (is_zero_ether_addr(bssid))
2163                 bssid = wpa_s->pending_bssid;
2164         if (wpa_s->wpa_state >= WPA_AUTHENTICATING)
2165                 wpas_connection_failed(wpa_s, bssid);
2166         wpa_sm_notify_disassoc(wpa_s->wpa);
2167         if (locally_generated)
2168                 wpa_s->disconnect_reason = -reason_code;
2169         else
2170                 wpa_s->disconnect_reason = reason_code;
2171         wpas_notify_disconnect_reason(wpa_s);
2172         if (wpa_supplicant_dynamic_keys(wpa_s)) {
2173                 wpa_dbg(wpa_s, MSG_DEBUG, "Disconnect event - remove keys");
2174                 wpa_clear_keys(wpa_s, wpa_s->bssid);
2175         }
2176         last_ssid = wpa_s->current_ssid;
2177         wpa_supplicant_mark_disassoc(wpa_s);
2178
2179         if (authenticating && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)) {
2180                 sme_disassoc_while_authenticating(wpa_s, prev_pending_bssid);
2181                 wpa_s->current_ssid = last_ssid;
2182         }
2183
2184         if (fast_reconnect) {
2185 #ifndef CONFIG_NO_SCAN_PROCESSING
2186                 wpa_dbg(wpa_s, MSG_DEBUG, "Try to reconnect to the same BSS");
2187                 if (wpa_supplicant_connect(wpa_s, fast_reconnect,
2188                                            fast_reconnect_ssid) < 0) {
2189                         /* Recover through full scan */
2190                         wpa_supplicant_req_scan(wpa_s, 0, 100000);
2191                 }
2192 #endif /* CONFIG_NO_SCAN_PROCESSING */
2193         }
2194 }
2195
2196
2197 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
2198 void wpa_supplicant_delayed_mic_error_report(void *eloop_ctx, void *sock_ctx)
2199 {
2200         struct wpa_supplicant *wpa_s = eloop_ctx;
2201
2202         if (!wpa_s->pending_mic_error_report)
2203                 return;
2204
2205         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Sending pending MIC error report");
2206         wpa_sm_key_request(wpa_s->wpa, 1, wpa_s->pending_mic_error_pairwise);
2207         wpa_s->pending_mic_error_report = 0;
2208 }
2209 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
2210
2211
2212 static void
2213 wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
2214                                          union wpa_event_data *data)
2215 {
2216         int pairwise;
2217         struct os_reltime t;
2218
2219         wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
2220         pairwise = (data && data->michael_mic_failure.unicast);
2221         os_get_reltime(&t);
2222         if ((wpa_s->last_michael_mic_error.sec &&
2223              !os_reltime_expired(&t, &wpa_s->last_michael_mic_error, 60)) ||
2224             wpa_s->pending_mic_error_report) {
2225                 if (wpa_s->pending_mic_error_report) {
2226                         /*
2227                          * Send the pending MIC error report immediately since
2228                          * we are going to start countermeasures and AP better
2229                          * do the same.
2230                          */
2231                         wpa_sm_key_request(wpa_s->wpa, 1,
2232                                            wpa_s->pending_mic_error_pairwise);
2233                 }
2234
2235                 /* Send the new MIC error report immediately since we are going
2236                  * to start countermeasures and AP better do the same.
2237                  */
2238                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
2239
2240                 /* initialize countermeasures */
2241                 wpa_s->countermeasures = 1;
2242
2243                 wpa_blacklist_add(wpa_s, wpa_s->bssid);
2244
2245                 wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
2246
2247                 /*
2248                  * Need to wait for completion of request frame. We do not get
2249                  * any callback for the message completion, so just wait a
2250                  * short while and hope for the best. */
2251                 os_sleep(0, 10000);
2252
2253                 wpa_drv_set_countermeasures(wpa_s, 1);
2254                 wpa_supplicant_deauthenticate(wpa_s,
2255                                               WLAN_REASON_MICHAEL_MIC_FAILURE);
2256                 eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
2257                                      wpa_s, NULL);
2258                 eloop_register_timeout(60, 0,
2259                                        wpa_supplicant_stop_countermeasures,
2260                                        wpa_s, NULL);
2261                 /* TODO: mark the AP rejected for 60 second. STA is
2262                  * allowed to associate with another AP.. */
2263         } else {
2264 #ifdef CONFIG_DELAYED_MIC_ERROR_REPORT
2265                 if (wpa_s->mic_errors_seen) {
2266                         /*
2267                          * Reduce the effectiveness of Michael MIC error
2268                          * reports as a means for attacking against TKIP if
2269                          * more than one MIC failure is noticed with the same
2270                          * PTK. We delay the transmission of the reports by a
2271                          * random time between 0 and 60 seconds in order to
2272                          * force the attacker wait 60 seconds before getting
2273                          * the information on whether a frame resulted in a MIC
2274                          * failure.
2275                          */
2276                         u8 rval[4];
2277                         int sec;
2278
2279                         if (os_get_random(rval, sizeof(rval)) < 0)
2280                                 sec = os_random() % 60;
2281                         else
2282                                 sec = WPA_GET_BE32(rval) % 60;
2283                         wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Delay MIC error "
2284                                 "report %d seconds", sec);
2285                         wpa_s->pending_mic_error_report = 1;
2286                         wpa_s->pending_mic_error_pairwise = pairwise;
2287                         eloop_cancel_timeout(
2288                                 wpa_supplicant_delayed_mic_error_report,
2289                                 wpa_s, NULL);
2290                         eloop_register_timeout(
2291                                 sec, os_random() % 1000000,
2292                                 wpa_supplicant_delayed_mic_error_report,
2293                                 wpa_s, NULL);
2294                 } else {
2295                         wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
2296                 }
2297 #else /* CONFIG_DELAYED_MIC_ERROR_REPORT */
2298                 wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
2299 #endif /* CONFIG_DELAYED_MIC_ERROR_REPORT */
2300         }
2301         wpa_s->last_michael_mic_error = t;
2302         wpa_s->mic_errors_seen++;
2303 }
2304
2305
2306 #ifdef CONFIG_TERMINATE_ONLASTIF
2307 static int any_interfaces(struct wpa_supplicant *head)
2308 {
2309         struct wpa_supplicant *wpa_s;
2310
2311         for (wpa_s = head; wpa_s != NULL; wpa_s = wpa_s->next)
2312                 if (!wpa_s->interface_removed)
2313                         return 1;
2314         return 0;
2315 }
2316 #endif /* CONFIG_TERMINATE_ONLASTIF */
2317
2318
2319 static void
2320 wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
2321                                       union wpa_event_data *data)
2322 {
2323         if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
2324                 return;
2325
2326         switch (data->interface_status.ievent) {
2327         case EVENT_INTERFACE_ADDED:
2328                 if (!wpa_s->interface_removed)
2329                         break;
2330                 wpa_s->interface_removed = 0;
2331                 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was added");
2332                 if (wpa_supplicant_driver_init(wpa_s) < 0) {
2333                         wpa_msg(wpa_s, MSG_INFO, "Failed to initialize the "
2334                                 "driver after interface was added");
2335                 }
2336                 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
2337                 break;
2338         case EVENT_INTERFACE_REMOVED:
2339                 wpa_dbg(wpa_s, MSG_DEBUG, "Configured interface was removed");
2340                 wpa_s->interface_removed = 1;
2341                 wpa_supplicant_mark_disassoc(wpa_s);
2342                 wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED);
2343                 l2_packet_deinit(wpa_s->l2);
2344                 wpa_s->l2 = NULL;
2345 #ifdef CONFIG_IBSS_RSN
2346                 ibss_rsn_deinit(wpa_s->ibss_rsn);
2347                 wpa_s->ibss_rsn = NULL;
2348 #endif /* CONFIG_IBSS_RSN */
2349 #ifdef CONFIG_TERMINATE_ONLASTIF
2350                 /* check if last interface */
2351                 if (!any_interfaces(wpa_s->global->ifaces))
2352                         eloop_terminate();
2353 #endif /* CONFIG_TERMINATE_ONLASTIF */
2354                 break;
2355         }
2356 }
2357
2358
2359 #ifdef CONFIG_PEERKEY
2360 static void
2361 wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
2362                               union wpa_event_data *data)
2363 {
2364         if (data == NULL)
2365                 return;
2366         wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
2367 }
2368 #endif /* CONFIG_PEERKEY */
2369
2370
2371 #ifdef CONFIG_TDLS
2372 static void wpa_supplicant_event_tdls(struct wpa_supplicant *wpa_s,
2373                                       union wpa_event_data *data)
2374 {
2375         if (data == NULL)
2376                 return;
2377         switch (data->tdls.oper) {
2378         case TDLS_REQUEST_SETUP:
2379                 wpa_tdls_remove(wpa_s->wpa, data->tdls.peer);
2380                 if (wpa_tdls_is_external_setup(wpa_s->wpa))
2381                         wpa_tdls_start(wpa_s->wpa, data->tdls.peer);
2382                 else
2383                         wpa_drv_tdls_oper(wpa_s, TDLS_SETUP, data->tdls.peer);
2384                 break;
2385         case TDLS_REQUEST_TEARDOWN:
2386                 if (wpa_tdls_is_external_setup(wpa_s->wpa))
2387                         wpa_tdls_teardown_link(wpa_s->wpa, data->tdls.peer,
2388                                                data->tdls.reason_code);
2389                 else
2390                         wpa_drv_tdls_oper(wpa_s, TDLS_TEARDOWN,
2391                                           data->tdls.peer);
2392                 break;
2393         }
2394 }
2395 #endif /* CONFIG_TDLS */
2396
2397
2398 #ifdef CONFIG_WNM
2399 static void wpa_supplicant_event_wnm(struct wpa_supplicant *wpa_s,
2400                                      union wpa_event_data *data)
2401 {
2402         if (data == NULL)
2403                 return;
2404         switch (data->wnm.oper) {
2405         case WNM_OPER_SLEEP:
2406                 wpa_printf(MSG_DEBUG, "Start sending WNM-Sleep Request "
2407                            "(action=%d, intval=%d)",
2408                            data->wnm.sleep_action, data->wnm.sleep_intval);
2409                 ieee802_11_send_wnmsleep_req(wpa_s, data->wnm.sleep_action,
2410                                              data->wnm.sleep_intval, NULL);
2411                 break;
2412         }
2413 }
2414 #endif /* CONFIG_WNM */
2415
2416
2417 #ifdef CONFIG_IEEE80211R
2418 static void
2419 wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
2420                                  union wpa_event_data *data)
2421 {
2422         if (data == NULL)
2423                 return;
2424
2425         if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
2426                                     data->ft_ies.ies_len,
2427                                     data->ft_ies.ft_action,
2428                                     data->ft_ies.target_ap,
2429                                     data->ft_ies.ric_ies,
2430                                     data->ft_ies.ric_ies_len) < 0) {
2431                 /* TODO: prevent MLME/driver from trying to associate? */
2432         }
2433 }
2434 #endif /* CONFIG_IEEE80211R */
2435
2436
2437 #ifdef CONFIG_IBSS_RSN
2438 static void wpa_supplicant_event_ibss_rsn_start(struct wpa_supplicant *wpa_s,
2439                                                 union wpa_event_data *data)
2440 {
2441         struct wpa_ssid *ssid;
2442         if (wpa_s->wpa_state < WPA_ASSOCIATED)
2443                 return;
2444         if (data == NULL)
2445                 return;
2446         ssid = wpa_s->current_ssid;
2447         if (ssid == NULL)
2448                 return;
2449         if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
2450                 return;
2451
2452         ibss_rsn_start(wpa_s->ibss_rsn, data->ibss_rsn_start.peer);
2453 }
2454
2455
2456 static void wpa_supplicant_event_ibss_auth(struct wpa_supplicant *wpa_s,
2457                                            union wpa_event_data *data)
2458 {
2459         struct wpa_ssid *ssid = wpa_s->current_ssid;
2460
2461         if (ssid == NULL)
2462                 return;
2463
2464         /* check if the ssid is correctly configured as IBSS/RSN */
2465         if (ssid->mode != WPAS_MODE_IBSS || !wpa_key_mgmt_wpa(ssid->key_mgmt))
2466                 return;
2467
2468         ibss_rsn_handle_auth(wpa_s->ibss_rsn, data->rx_mgmt.frame,
2469                              data->rx_mgmt.frame_len);
2470 }
2471 #endif /* CONFIG_IBSS_RSN */
2472
2473
2474 #ifdef CONFIG_IEEE80211R
2475 static void ft_rx_action(struct wpa_supplicant *wpa_s, const u8 *data,
2476                          size_t len)
2477 {
2478         const u8 *sta_addr, *target_ap_addr;
2479         u16 status;
2480
2481         wpa_hexdump(MSG_MSGDUMP, "FT: RX Action", data, len);
2482         if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME))
2483                 return; /* only SME case supported for now */
2484         if (len < 1 + 2 * ETH_ALEN + 2)
2485                 return;
2486         if (data[0] != 2)
2487                 return; /* Only FT Action Response is supported for now */
2488         sta_addr = data + 1;
2489         target_ap_addr = data + 1 + ETH_ALEN;
2490         status = WPA_GET_LE16(data + 1 + 2 * ETH_ALEN);
2491         wpa_dbg(wpa_s, MSG_DEBUG, "FT: Received FT Action Response: STA "
2492                 MACSTR " TargetAP " MACSTR " status %u",
2493                 MAC2STR(sta_addr), MAC2STR(target_ap_addr), status);
2494
2495         if (os_memcmp(sta_addr, wpa_s->own_addr, ETH_ALEN) != 0) {
2496                 wpa_dbg(wpa_s, MSG_DEBUG, "FT: Foreign STA Address " MACSTR
2497                         " in FT Action Response", MAC2STR(sta_addr));
2498                 return;
2499         }
2500
2501         if (status) {
2502                 wpa_dbg(wpa_s, MSG_DEBUG, "FT: FT Action Response indicates "
2503                         "failure (status code %d)", status);
2504                 /* TODO: report error to FT code(?) */
2505                 return;
2506         }
2507
2508         if (wpa_ft_process_response(wpa_s->wpa, data + 1 + 2 * ETH_ALEN + 2,
2509                                     len - (1 + 2 * ETH_ALEN + 2), 1,
2510                                     target_ap_addr, NULL, 0) < 0)
2511                 return;
2512
2513 #ifdef CONFIG_SME
2514         {
2515                 struct wpa_bss *bss;
2516                 bss = wpa_bss_get_bssid(wpa_s, target_ap_addr);
2517                 if (bss)
2518                         wpa_s->sme.freq = bss->freq;
2519                 wpa_s->sme.auth_alg = WPA_AUTH_ALG_FT;
2520                 sme_associate(wpa_s, WPAS_MODE_INFRA, target_ap_addr,
2521                               WLAN_AUTH_FT);
2522         }
2523 #endif /* CONFIG_SME */
2524 }
2525 #endif /* CONFIG_IEEE80211R */
2526
2527
2528 static void wpa_supplicant_event_unprot_deauth(struct wpa_supplicant *wpa_s,
2529                                                struct unprot_deauth *e)
2530 {
2531 #ifdef CONFIG_IEEE80211W
2532         wpa_printf(MSG_DEBUG, "Unprotected Deauthentication frame "
2533                    "dropped: " MACSTR " -> " MACSTR
2534                    " (reason code %u)",
2535                    MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
2536         sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
2537 #endif /* CONFIG_IEEE80211W */
2538 }
2539
2540
2541 static void wpa_supplicant_event_unprot_disassoc(struct wpa_supplicant *wpa_s,
2542                                                  struct unprot_disassoc *e)
2543 {
2544 #ifdef CONFIG_IEEE80211W
2545         wpa_printf(MSG_DEBUG, "Unprotected Disassociation frame "
2546                    "dropped: " MACSTR " -> " MACSTR
2547                    " (reason code %u)",
2548                    MAC2STR(e->sa), MAC2STR(e->da), e->reason_code);
2549         sme_event_unprot_disconnect(wpa_s, e->sa, e->da, e->reason_code);
2550 #endif /* CONFIG_IEEE80211W */
2551 }
2552
2553
2554 static void wpas_event_disconnect(struct wpa_supplicant *wpa_s, const u8 *addr,
2555                                   u16 reason_code, int locally_generated,
2556                                   const u8 *ie, size_t ie_len, int deauth)
2557 {
2558 #ifdef CONFIG_AP
2559         if (wpa_s->ap_iface && addr) {
2560                 hostapd_notif_disassoc(wpa_s->ap_iface->bss[0], addr);
2561                 return;
2562         }
2563
2564         if (wpa_s->ap_iface) {
2565                 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore deauth event in AP mode");
2566                 return;
2567         }
2568 #endif /* CONFIG_AP */
2569
2570         wpa_supplicant_event_disassoc(wpa_s, reason_code, locally_generated);
2571
2572         if (reason_code == WLAN_REASON_IEEE_802_1X_AUTH_FAILED ||
2573             ((wpa_key_mgmt_wpa_ieee8021x(wpa_s->key_mgmt) ||
2574               (wpa_s->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA)) &&
2575              eapol_sm_failed(wpa_s->eapol)))
2576                 wpas_auth_failed(wpa_s);
2577
2578 #ifdef CONFIG_P2P
2579         if (deauth && reason_code > 0) {
2580                 if (wpas_p2p_deauth_notif(wpa_s, addr, reason_code, ie, ie_len,
2581                                           locally_generated) > 0) {
2582                         /*
2583                          * The interface was removed, so cannot continue
2584                          * processing any additional operations after this.
2585                          */
2586                         return;
2587                 }
2588         }
2589 #endif /* CONFIG_P2P */
2590
2591         wpa_supplicant_event_disassoc_finish(wpa_s, reason_code,
2592                                              locally_generated);
2593 }
2594
2595
2596 static void wpas_event_disassoc(struct wpa_supplicant *wpa_s,
2597                                 struct disassoc_info *info)
2598 {
2599         u16 reason_code = 0;
2600         int locally_generated = 0;
2601         const u8 *addr = NULL;
2602         const u8 *ie = NULL;
2603         size_t ie_len = 0;
2604
2605         wpa_dbg(wpa_s, MSG_DEBUG, "Disassociation notification");
2606
2607         if (info) {
2608                 addr = info->addr;
2609                 ie = info->ie;
2610                 ie_len = info->ie_len;
2611                 reason_code = info->reason_code;
2612                 locally_generated = info->locally_generated;
2613                 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u%s", reason_code,
2614                         locally_generated ? " (locally generated)" : "");
2615                 if (addr)
2616                         wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR,
2617                                 MAC2STR(addr));
2618                 wpa_hexdump(MSG_DEBUG, "Disassociation frame IE(s)",
2619                             ie, ie_len);
2620         }
2621
2622 #ifdef CONFIG_AP
2623         if (wpa_s->ap_iface && info && info->addr) {
2624                 hostapd_notif_disassoc(wpa_s->ap_iface->bss[0], info->addr);
2625                 return;
2626         }
2627
2628         if (wpa_s->ap_iface) {
2629                 wpa_dbg(wpa_s, MSG_DEBUG, "Ignore disassoc event in AP mode");
2630                 return;
2631         }
2632 #endif /* CONFIG_AP */
2633
2634 #ifdef CONFIG_P2P
2635         if (info) {
2636                 wpas_p2p_disassoc_notif(
2637                         wpa_s, info->addr, reason_code, info->ie, info->ie_len,
2638                         locally_generated);
2639         }
2640 #endif /* CONFIG_P2P */
2641
2642         if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2643                 sme_event_disassoc(wpa_s, info);
2644
2645         wpas_event_disconnect(wpa_s, addr, reason_code, locally_generated,
2646                               ie, ie_len, 0);
2647 }
2648
2649
2650 static void wpas_event_deauth(struct wpa_supplicant *wpa_s,
2651                               struct deauth_info *info)
2652 {
2653         u16 reason_code = 0;
2654         int locally_generated = 0;
2655         const u8 *addr = NULL;
2656         const u8 *ie = NULL;
2657         size_t ie_len = 0;
2658
2659         wpa_dbg(wpa_s, MSG_DEBUG, "Deauthentication notification");
2660
2661         if (info) {
2662                 addr = info->addr;
2663                 ie = info->ie;
2664                 ie_len = info->ie_len;
2665                 reason_code = info->reason_code;
2666                 locally_generated = info->locally_generated;
2667                 wpa_dbg(wpa_s, MSG_DEBUG, " * reason %u%s",
2668                         reason_code,
2669                         locally_generated ? " (locally generated)" : "");
2670                 if (addr) {
2671                         wpa_dbg(wpa_s, MSG_DEBUG, " * address " MACSTR,
2672                                 MAC2STR(addr));
2673                 }
2674                 wpa_hexdump(MSG_DEBUG, "Deauthentication frame IE(s)",
2675                             ie, ie_len);
2676         }
2677
2678         wpa_reset_ft_completed(wpa_s->wpa);
2679
2680         wpas_event_disconnect(wpa_s, addr, reason_code,
2681                               locally_generated, ie, ie_len, 1);
2682 }
2683
2684
2685 static void wpa_supplicant_update_channel_list(struct wpa_supplicant *wpa_s)
2686 {
2687         struct wpa_supplicant *ifs;
2688
2689         if (wpa_s->drv_priv == NULL)
2690                 return; /* Ignore event during drv initialization */
2691
2692         free_hw_features(wpa_s);
2693         wpa_s->hw.modes = wpa_drv_get_hw_feature_data(
2694                 wpa_s, &wpa_s->hw.num_modes, &wpa_s->hw.flags);
2695
2696 #ifdef CONFIG_P2P
2697         wpas_p2p_update_channel_list(wpa_s);
2698 #endif /* CONFIG_P2P */
2699
2700         /*
2701          * Check other interfaces to see if they share the same radio. If
2702          * so, they get updated with this same hw mode info.
2703          */
2704         dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant,
2705                          radio_list) {
2706                 if (ifs != wpa_s) {
2707                         wpa_printf(MSG_DEBUG, "%s: Updating hw mode",
2708                                    ifs->ifname);
2709                         free_hw_features(ifs);
2710                         ifs->hw.modes = wpa_drv_get_hw_feature_data(
2711                                 ifs, &ifs->hw.num_modes, &ifs->hw.flags);
2712                 }
2713         }
2714 }
2715
2716
2717 static void wpas_event_rx_mgmt_action(struct wpa_supplicant *wpa_s,
2718                                       const struct ieee80211_mgmt *mgmt,
2719                                       size_t len, int freq)
2720 {
2721         const u8 *payload;
2722         size_t plen;
2723         u8 category;
2724
2725         if (len < IEEE80211_HDRLEN + 2)
2726                 return;
2727
2728         payload = &mgmt->u.action.category;
2729         category = *payload++;
2730         plen = (((const u8 *) mgmt) + len) - payload;
2731
2732         wpa_dbg(wpa_s, MSG_DEBUG, "Received Action frame: SA=" MACSTR
2733                 " Category=%u DataLen=%d freq=%d MHz",
2734                 MAC2STR(mgmt->sa), category, (int) plen, freq);
2735
2736 #ifdef CONFIG_IEEE80211R
2737         if (category == WLAN_ACTION_FT) {
2738                 ft_rx_action(wpa_s, payload, plen);
2739                 return;
2740         }
2741 #endif /* CONFIG_IEEE80211R */
2742
2743 #ifdef CONFIG_IEEE80211W
2744 #ifdef CONFIG_SME
2745         if (category == WLAN_ACTION_SA_QUERY) {
2746                 sme_sa_query_rx(wpa_s, mgmt->sa, payload, plen);
2747                 return;
2748         }
2749 #endif /* CONFIG_SME */
2750 #endif /* CONFIG_IEEE80211W */
2751
2752 #ifdef CONFIG_WNM
2753         if (mgmt->u.action.category == WLAN_ACTION_WNM) {
2754                 ieee802_11_rx_wnm_action(wpa_s, mgmt, len);
2755                 return;
2756         }
2757 #endif /* CONFIG_WNM */
2758
2759 #ifdef CONFIG_GAS
2760         if (mgmt->u.action.category == WLAN_ACTION_PUBLIC &&
2761             gas_query_rx(wpa_s->gas, mgmt->da, mgmt->sa, mgmt->bssid,
2762                          payload, plen, freq) == 0)
2763                 return;
2764 #endif /* CONFIG_GAS */
2765
2766 #ifdef CONFIG_TDLS
2767         if (category == WLAN_ACTION_PUBLIC && plen >= 4 &&
2768             payload[0] == WLAN_TDLS_DISCOVERY_RESPONSE) {
2769                 wpa_dbg(wpa_s, MSG_DEBUG,
2770                         "TDLS: Received Discovery Response from " MACSTR,
2771                         MAC2STR(mgmt->sa));
2772                 return;
2773         }
2774 #endif /* CONFIG_TDLS */
2775
2776 #ifdef CONFIG_INTERWORKING
2777         if (category == WLAN_ACTION_QOS && plen >= 1 &&
2778             payload[0] == QOS_QOS_MAP_CONFIG) {
2779                 const u8 *pos = payload + 1;
2780                 size_t qlen = plen - 1;
2781                 wpa_dbg(wpa_s, MSG_DEBUG, "Interworking: Received QoS Map Configure frame from "
2782                         MACSTR, MAC2STR(mgmt->sa));
2783                 if (os_memcmp(mgmt->sa, wpa_s->bssid, ETH_ALEN) == 0 &&
2784                     qlen > 2 && pos[0] == WLAN_EID_QOS_MAP_SET &&
2785                     pos[1] <= qlen - 2 && pos[1] >= 16)
2786                         wpas_qos_map_set(wpa_s, pos + 2, pos[1]);
2787                 return;
2788         }
2789 #endif /* CONFIG_INTERWORKING */
2790
2791 #ifdef CONFIG_P2P
2792         wpas_p2p_rx_action(wpa_s, mgmt->da, mgmt->sa, mgmt->bssid,
2793                            category, payload, plen, freq);
2794 #endif /* CONFIG_P2P */
2795 }
2796
2797
2798 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
2799                           union wpa_event_data *data)
2800 {
2801         struct wpa_supplicant *wpa_s = ctx;
2802
2803         if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED &&
2804             event != EVENT_INTERFACE_ENABLED &&
2805             event != EVENT_INTERFACE_STATUS &&
2806             event != EVENT_SCHED_SCAN_STOPPED) {
2807                 wpa_dbg(wpa_s, MSG_DEBUG,
2808                         "Ignore event %s (%d) while interface is disabled",
2809                         event_to_string(event), event);
2810                 return;
2811         }
2812
2813 #ifndef CONFIG_NO_STDOUT_DEBUG
2814 {
2815         int level = MSG_DEBUG;
2816
2817         if (event == EVENT_RX_MGMT && data->rx_mgmt.frame_len >= 24) {
2818                 const struct ieee80211_hdr *hdr;
2819                 u16 fc;
2820                 hdr = (const struct ieee80211_hdr *) data->rx_mgmt.frame;
2821                 fc = le_to_host16(hdr->frame_control);
2822                 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2823                     WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
2824                         level = MSG_EXCESSIVE;
2825         }
2826
2827         wpa_dbg(wpa_s, level, "Event %s (%d) received",
2828                 event_to_string(event), event);
2829 }
2830 #endif /* CONFIG_NO_STDOUT_DEBUG */
2831
2832         switch (event) {
2833         case EVENT_AUTH:
2834                 sme_event_auth(wpa_s, data);
2835                 break;
2836         case EVENT_ASSOC:
2837                 wpa_supplicant_event_assoc(wpa_s, data);
2838                 break;
2839         case EVENT_DISASSOC:
2840                 wpas_event_disassoc(wpa_s,
2841                                     data ? &data->disassoc_info : NULL);
2842                 break;
2843         case EVENT_DEAUTH:
2844                 wpas_event_deauth(wpa_s,
2845                                   data ? &data->deauth_info : NULL);
2846                 break;
2847         case EVENT_MICHAEL_MIC_FAILURE:
2848                 wpa_supplicant_event_michael_mic_failure(wpa_s, data);
2849                 break;
2850 #ifndef CONFIG_NO_SCAN_PROCESSING
2851         case EVENT_SCAN_STARTED:
2852                 os_get_reltime(&wpa_s->scan_start_time);
2853                 if (wpa_s->own_scan_requested) {
2854                         struct os_reltime diff;
2855
2856                         os_reltime_sub(&wpa_s->scan_start_time,
2857                                        &wpa_s->scan_trigger_time, &diff);
2858                         wpa_dbg(wpa_s, MSG_DEBUG, "Own scan request started a scan in %ld.%06ld seconds",
2859                                 diff.sec, diff.usec);
2860                         wpa_s->own_scan_requested = 0;
2861                         wpa_s->own_scan_running = 1;
2862                         if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
2863                             wpa_s->manual_scan_use_id) {
2864                                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_STARTED "id=%u",
2865                                         wpa_s->manual_scan_id);
2866                         } else {
2867                                 wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_STARTED);
2868                         }
2869                 } else {
2870                         wpa_dbg(wpa_s, MSG_DEBUG, "External program started a scan");
2871                         wpa_s->external_scan_running = 1;
2872                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_STARTED);
2873                 }
2874                 break;
2875         case EVENT_SCAN_RESULTS:
2876                 if (os_reltime_initialized(&wpa_s->scan_start_time)) {
2877                         struct os_reltime now, diff;
2878                         os_get_reltime(&now);
2879                         os_reltime_sub(&now, &wpa_s->scan_start_time, &diff);
2880                         wpa_s->scan_start_time.sec = 0;
2881                         wpa_s->scan_start_time.usec = 0;
2882                         wpa_dbg(wpa_s, MSG_DEBUG, "Scan completed in %ld.%06ld seconds",
2883                                 diff.sec, diff.usec);
2884                 }
2885                 wpa_supplicant_event_scan_results(wpa_s, data);
2886                 wpa_s->own_scan_running = 0;
2887                 wpa_s->external_scan_running = 0;
2888                 if (wpa_s->wpa_state != WPA_AUTHENTICATING &&
2889                     wpa_s->wpa_state != WPA_ASSOCIATING)
2890                         wpas_p2p_continue_after_scan(wpa_s);
2891                 break;
2892 #endif /* CONFIG_NO_SCAN_PROCESSING */
2893         case EVENT_ASSOCINFO:
2894                 wpa_supplicant_event_associnfo(wpa_s, data);
2895                 break;
2896         case EVENT_INTERFACE_STATUS:
2897                 wpa_supplicant_event_interface_status(wpa_s, data);
2898                 break;
2899         case EVENT_PMKID_CANDIDATE:
2900                 wpa_supplicant_event_pmkid_candidate(wpa_s, data);
2901                 break;
2902 #ifdef CONFIG_PEERKEY
2903         case EVENT_STKSTART:
2904                 wpa_supplicant_event_stkstart(wpa_s, data);
2905                 break;
2906 #endif /* CONFIG_PEERKEY */
2907 #ifdef CONFIG_TDLS
2908         case EVENT_TDLS:
2909                 wpa_supplicant_event_tdls(wpa_s, data);
2910                 break;
2911 #endif /* CONFIG_TDLS */
2912 #ifdef CONFIG_WNM
2913         case EVENT_WNM:
2914                 wpa_supplicant_event_wnm(wpa_s, data);
2915                 break;
2916 #endif /* CONFIG_WNM */
2917 #ifdef CONFIG_IEEE80211R
2918         case EVENT_FT_RESPONSE:
2919                 wpa_supplicant_event_ft_response(wpa_s, data);
2920                 break;
2921 #endif /* CONFIG_IEEE80211R */
2922 #ifdef CONFIG_IBSS_RSN
2923         case EVENT_IBSS_RSN_START:
2924                 wpa_supplicant_event_ibss_rsn_start(wpa_s, data);
2925                 break;
2926 #endif /* CONFIG_IBSS_RSN */
2927         case EVENT_ASSOC_REJECT:
2928                 if (data->assoc_reject.bssid)
2929                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
2930                                 "bssid=" MACSTR " status_code=%u",
2931                                 MAC2STR(data->assoc_reject.bssid),
2932                                 data->assoc_reject.status_code);
2933                 else
2934                         wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_ASSOC_REJECT
2935                                 "status_code=%u",
2936                                 data->assoc_reject.status_code);
2937                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2938                         sme_event_assoc_reject(wpa_s, data);
2939                 else {
2940                         const u8 *bssid = data->assoc_reject.bssid;
2941                         if (bssid == NULL || is_zero_ether_addr(bssid))
2942                                 bssid = wpa_s->pending_bssid;
2943                         wpas_connection_failed(wpa_s, bssid);
2944                         wpa_supplicant_mark_disassoc(wpa_s);
2945                 }
2946                 break;
2947         case EVENT_AUTH_TIMED_OUT:
2948                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2949                         sme_event_auth_timed_out(wpa_s, data);
2950                 break;
2951         case EVENT_ASSOC_TIMED_OUT:
2952                 if (wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME)
2953                         sme_event_assoc_timed_out(wpa_s, data);
2954                 break;
2955         case EVENT_TX_STATUS:
2956                 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS dst=" MACSTR
2957                         " type=%d stype=%d",
2958                         MAC2STR(data->tx_status.dst),
2959                         data->tx_status.type, data->tx_status.stype);
2960 #ifdef CONFIG_AP
2961                 if (wpa_s->ap_iface == NULL) {
2962 #ifdef CONFIG_OFFCHANNEL
2963                         if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
2964                             data->tx_status.stype == WLAN_FC_STYPE_ACTION)
2965                                 offchannel_send_action_tx_status(
2966                                         wpa_s, data->tx_status.dst,
2967                                         data->tx_status.data,
2968                                         data->tx_status.data_len,
2969                                         data->tx_status.ack ?
2970                                         OFFCHANNEL_SEND_ACTION_SUCCESS :
2971                                         OFFCHANNEL_SEND_ACTION_NO_ACK);
2972 #endif /* CONFIG_OFFCHANNEL */
2973                         break;
2974                 }
2975 #endif /* CONFIG_AP */
2976 #ifdef CONFIG_OFFCHANNEL
2977                 wpa_dbg(wpa_s, MSG_DEBUG, "EVENT_TX_STATUS pending_dst="
2978                         MACSTR, MAC2STR(wpa_s->parent->pending_action_dst));
2979                 /*
2980                  * Catch TX status events for Action frames we sent via group
2981                  * interface in GO mode.
2982                  */
2983                 if (data->tx_status.type == WLAN_FC_TYPE_MGMT &&
2984                     data->tx_status.stype == WLAN_FC_STYPE_ACTION &&
2985                     os_memcmp(wpa_s->parent->pending_action_dst,
2986                               data->tx_status.dst, ETH_ALEN) == 0) {
2987                         offchannel_send_action_tx_status(
2988                                 wpa_s->parent, data->tx_status.dst,
2989                                 data->tx_status.data,
2990                                 data->tx_status.data_len,
2991                                 data->tx_status.ack ?
2992                                 OFFCHANNEL_SEND_ACTION_SUCCESS :
2993                                 OFFCHANNEL_SEND_ACTION_NO_ACK);
2994                         break;
2995                 }
2996 #endif /* CONFIG_OFFCHANNEL */
2997 #ifdef CONFIG_AP
2998                 switch (data->tx_status.type) {
2999                 case WLAN_FC_TYPE_MGMT:
3000                         ap_mgmt_tx_cb(wpa_s, data->tx_status.data,
3001                                       data->tx_status.data_len,
3002                                       data->tx_status.stype,
3003                                       data->tx_status.ack);
3004                         break;
3005                 case WLAN_FC_TYPE_DATA:
3006                         ap_tx_status(wpa_s, data->tx_status.dst,
3007                                      data->tx_status.data,
3008                                      data->tx_status.data_len,
3009                                      data->tx_status.ack);
3010                         break;
3011                 }
3012 #endif /* CONFIG_AP */
3013                 break;
3014 #ifdef CONFIG_AP
3015         case EVENT_EAPOL_TX_STATUS:
3016                 ap_eapol_tx_status(wpa_s, data->eapol_tx_status.dst,
3017                                    data->eapol_tx_status.data,
3018                                    data->eapol_tx_status.data_len,
3019                                    data->eapol_tx_status.ack);
3020                 break;
3021         case EVENT_DRIVER_CLIENT_POLL_OK:
3022                 ap_client_poll_ok(wpa_s, data->client_poll.addr);
3023                 break;
3024         case EVENT_RX_FROM_UNKNOWN:
3025                 if (wpa_s->ap_iface == NULL)
3026                         break;
3027                 ap_rx_from_unknown_sta(wpa_s, data->rx_from_unknown.addr,
3028                                        data->rx_from_unknown.wds);
3029                 break;
3030         case EVENT_CH_SWITCH:
3031                 if (!data)
3032                         break;
3033                 if (!wpa_s->ap_iface) {
3034                         wpa_dbg(wpa_s, MSG_DEBUG, "AP: Ignore channel switch "
3035                                 "event in non-AP mode");
3036                         break;
3037                 }
3038
3039                 wpas_ap_ch_switch(wpa_s, data->ch_switch.freq,
3040                                   data->ch_switch.ht_enabled,
3041                                   data->ch_switch.ch_offset,
3042                                   data->ch_switch.ch_width,
3043                                   data->ch_switch.cf1,
3044                                   data->ch_switch.cf2);
3045                 break;
3046 #endif /* CONFIG_AP */
3047         case EVENT_RX_MGMT: {
3048                 u16 fc, stype;
3049                 const struct ieee80211_mgmt *mgmt;
3050
3051                 mgmt = (const struct ieee80211_mgmt *)
3052                         data->rx_mgmt.frame;
3053                 fc = le_to_host16(mgmt->frame_control);
3054                 stype = WLAN_FC_GET_STYPE(fc);
3055
3056 #ifdef CONFIG_AP
3057                 if (wpa_s->ap_iface == NULL) {
3058 #endif /* CONFIG_AP */
3059 #ifdef CONFIG_P2P
3060                         if (stype == WLAN_FC_STYPE_PROBE_REQ &&
3061                             data->rx_mgmt.frame_len > 24) {
3062                                 const u8 *src = mgmt->sa;
3063                                 const u8 *ie = mgmt->u.probe_req.variable;
3064                                 size_t ie_len = data->rx_mgmt.frame_len -
3065                                         (mgmt->u.probe_req.variable -
3066                                          data->rx_mgmt.frame);
3067                                 wpas_p2p_probe_req_rx(
3068                                         wpa_s, src, mgmt->da,
3069                                         mgmt->bssid, ie, ie_len,
3070                                         data->rx_mgmt.ssi_signal);
3071                                 break;
3072                         }
3073 #endif /* CONFIG_P2P */
3074 #ifdef CONFIG_IBSS_RSN
3075                         if (stype == WLAN_FC_STYPE_AUTH &&
3076                             data->rx_mgmt.frame_len >= 30) {
3077                                 wpa_supplicant_event_ibss_auth(wpa_s, data);
3078                                 break;
3079                         }
3080 #endif /* CONFIG_IBSS_RSN */
3081
3082                         if (stype == WLAN_FC_STYPE_ACTION) {
3083                                 wpas_event_rx_mgmt_action(
3084                                         wpa_s, mgmt, data->rx_mgmt.frame_len,
3085                                         data->rx_mgmt.freq);
3086                                 break;
3087                         }
3088
3089                         wpa_dbg(wpa_s, MSG_DEBUG, "AP: ignore received "
3090                                 "management frame in non-AP mode");
3091                         break;
3092 #ifdef CONFIG_AP
3093                 }
3094
3095                 if (stype == WLAN_FC_STYPE_PROBE_REQ &&
3096                     data->rx_mgmt.frame_len > 24) {
3097                         const u8 *ie = mgmt->u.probe_req.variable;
3098                         size_t ie_len = data->rx_mgmt.frame_len -
3099                                 (mgmt->u.probe_req.variable -
3100                                  data->rx_mgmt.frame);
3101
3102                         wpas_notify_preq(wpa_s, mgmt->sa, mgmt->da,
3103                                          mgmt->bssid, ie, ie_len,
3104                                          data->rx_mgmt.ssi_signal);
3105                 }
3106
3107                 ap_mgmt_rx(wpa_s, &data->rx_mgmt);
3108 #endif /* CONFIG_AP */
3109                 break;
3110                 }
3111         case EVENT_RX_PROBE_REQ:
3112                 if (data->rx_probe_req.sa == NULL ||
3113                     data->rx_probe_req.ie == NULL)
3114                         break;
3115 #ifdef CONFIG_AP
3116                 if (wpa_s->ap_iface) {
3117                         hostapd_probe_req_rx(wpa_s->ap_iface->bss[0],
3118                                              data->rx_probe_req.sa,
3119                                              data->rx_probe_req.da,
3120                                              data->rx_probe_req.bssid,
3121                                              data->rx_probe_req.ie,
3122                                              data->rx_probe_req.ie_len,
3123                                              data->rx_probe_req.ssi_signal);
3124                         break;
3125                 }
3126 #endif /* CONFIG_AP */
3127 #ifdef CONFIG_P2P
3128                 wpas_p2p_probe_req_rx(wpa_s, data->rx_probe_req.sa,
3129                                       data->rx_probe_req.da,
3130                                       data->rx_probe_req.bssid,
3131                                       data->rx_probe_req.ie,
3132                                       data->rx_probe_req.ie_len,
3133                                       data->rx_probe_req.ssi_signal);
3134 #endif /* CONFIG_P2P */
3135                 break;
3136         case EVENT_REMAIN_ON_CHANNEL:
3137 #ifdef CONFIG_OFFCHANNEL
3138                 offchannel_remain_on_channel_cb(
3139                         wpa_s, data->remain_on_channel.freq,
3140                         data->remain_on_channel.duration);
3141 #endif /* CONFIG_OFFCHANNEL */
3142 #ifdef CONFIG_P2P
3143                 wpas_p2p_remain_on_channel_cb(
3144                         wpa_s, data->remain_on_channel.freq,
3145                         data->remain_on_channel.duration);
3146 #endif /* CONFIG_P2P */
3147                 break;
3148         case EVENT_CANCEL_REMAIN_ON_CHANNEL:
3149 #ifdef CONFIG_OFFCHANNEL
3150                 offchannel_cancel_remain_on_channel_cb(
3151                         wpa_s, data->remain_on_channel.freq);
3152 #endif /* CONFIG_OFFCHANNEL */
3153 #ifdef CONFIG_P2P
3154                 wpas_p2p_cancel_remain_on_channel_cb(
3155                         wpa_s, data->remain_on_channel.freq);
3156 #endif /* CONFIG_P2P */
3157                 break;
3158         case EVENT_EAPOL_RX:
3159                 wpa_supplicant_rx_eapol(wpa_s, data->eapol_rx.src,
3160                                         data->eapol_rx.data,
3161                                         data->eapol_rx.data_len);
3162                 break;
3163         case EVENT_SIGNAL_CHANGE:
3164                 bgscan_notify_signal_change(
3165                         wpa_s, data->signal_change.above_threshold,
3166                         data->signal_change.current_signal,
3167                         data->signal_change.current_noise,
3168                         data->signal_change.current_txrate);
3169                 break;
3170         case EVENT_INTERFACE_ENABLED:
3171                 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was enabled");
3172                 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED) {
3173                         wpa_supplicant_update_mac_addr(wpa_s);
3174 #ifdef CONFIG_AP
3175                         if (!wpa_s->ap_iface) {
3176                                 wpa_supplicant_set_state(wpa_s,
3177                                                          WPA_DISCONNECTED);
3178                                 wpa_supplicant_req_scan(wpa_s, 0, 0);
3179                         } else
3180                                 wpa_supplicant_set_state(wpa_s,
3181                                                          WPA_COMPLETED);
3182 #else /* CONFIG_AP */
3183                         wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
3184                         wpa_supplicant_req_scan(wpa_s, 0, 0);
3185 #endif /* CONFIG_AP */
3186                 }
3187                 break;
3188         case EVENT_INTERFACE_DISABLED:
3189                 wpa_dbg(wpa_s, MSG_DEBUG, "Interface was disabled");
3190 #ifdef CONFIG_P2P
3191                 if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_GO ||
3192                     (wpa_s->current_ssid && wpa_s->current_ssid->p2p_group &&
3193                      wpa_s->current_ssid->mode == WPAS_MODE_P2P_GO)) {
3194                         /*
3195                          * The interface was externally disabled. Remove
3196                          * it assuming an external entity will start a
3197                          * new session if needed.
3198                          */
3199                         wpas_p2p_disconnect(wpa_s);
3200                         break;
3201                 }
3202 #endif /* CONFIG_P2P */
3203
3204                 wpa_supplicant_mark_disassoc(wpa_s);
3205                 wpa_supplicant_set_state(wpa_s, WPA_INTERFACE_DISABLED);
3206                 break;
3207         case EVENT_CHANNEL_LIST_CHANGED:
3208                 wpa_supplicant_update_channel_list(wpa_s);
3209                 break;
3210         case EVENT_INTERFACE_UNAVAILABLE:
3211 #ifdef CONFIG_P2P
3212                 wpas_p2p_interface_unavailable(wpa_s);
3213 #endif /* CONFIG_P2P */
3214                 break;
3215         case EVENT_BEST_CHANNEL:
3216                 wpa_dbg(wpa_s, MSG_DEBUG, "Best channel event received "
3217                         "(%d %d %d)",
3218                         data->best_chan.freq_24, data->best_chan.freq_5,
3219                         data->best_chan.freq_overall);
3220                 wpa_s->best_24_freq = data->best_chan.freq_24;
3221                 wpa_s->best_5_freq = data->best_chan.freq_5;
3222                 wpa_s->best_overall_freq = data->best_chan.freq_overall;
3223 #ifdef CONFIG_P2P
3224                 wpas_p2p_update_best_channels(wpa_s, data->best_chan.freq_24,
3225                                               data->best_chan.freq_5,
3226                                               data->best_chan.freq_overall);
3227 #endif /* CONFIG_P2P */
3228                 break;
3229         case EVENT_UNPROT_DEAUTH:
3230                 wpa_supplicant_event_unprot_deauth(wpa_s,
3231                                                    &data->unprot_deauth);
3232                 break;
3233         case EVENT_UNPROT_DISASSOC:
3234                 wpa_supplicant_event_unprot_disassoc(wpa_s,
3235                                                      &data->unprot_disassoc);
3236                 break;
3237         case EVENT_STATION_LOW_ACK:
3238 #ifdef CONFIG_AP
3239                 if (wpa_s->ap_iface && data)
3240                         hostapd_event_sta_low_ack(wpa_s->ap_iface->bss[0],
3241                                                   data->low_ack.addr);
3242 #endif /* CONFIG_AP */
3243 #ifdef CONFIG_TDLS
3244                 if (data)
3245                         wpa_tdls_disable_link(wpa_s->wpa, data->low_ack.addr);
3246 #endif /* CONFIG_TDLS */
3247                 break;
3248         case EVENT_IBSS_PEER_LOST:
3249 #ifdef CONFIG_IBSS_RSN
3250                 ibss_rsn_stop(wpa_s->ibss_rsn, data->ibss_peer_lost.peer);
3251 #endif /* CONFIG_IBSS_RSN */
3252                 break;
3253         case EVENT_DRIVER_GTK_REKEY:
3254                 if (os_memcmp(data->driver_gtk_rekey.bssid,
3255                               wpa_s->bssid, ETH_ALEN))
3256                         break;
3257                 if (!wpa_s->wpa)
3258                         break;
3259                 wpa_sm_update_replay_ctr(wpa_s->wpa,
3260                                          data->driver_gtk_rekey.replay_ctr);
3261                 break;
3262         case EVENT_SCHED_SCAN_STOPPED:
3263                 wpa_s->sched_scanning = 0;
3264                 wpa_supplicant_notify_scanning(wpa_s, 0);
3265
3266                 if (wpa_s->wpa_state == WPA_INTERFACE_DISABLED)
3267                         break;
3268
3269                 /*
3270                  * If we timed out, start a new sched scan to continue
3271                  * searching for more SSIDs.
3272                  */
3273                 if (wpa_s->sched_scan_timed_out)
3274                         wpa_supplicant_req_sched_scan(wpa_s);
3275                 break;
3276         case EVENT_WPS_BUTTON_PUSHED:
3277 #ifdef CONFIG_WPS
3278                 wpas_wps_start_pbc(wpa_s, NULL, 0);
3279 #endif /* CONFIG_WPS */
3280                 break;
3281         case EVENT_CONNECT_FAILED_REASON:
3282 #ifdef CONFIG_AP
3283                 if (!wpa_s->ap_iface || !data)
3284                         break;
3285                 hostapd_event_connect_failed_reason(
3286                         wpa_s->ap_iface->bss[0],
3287                         data->connect_failed_reason.addr,
3288                         data->connect_failed_reason.code);
3289 #endif /* CONFIG_AP */
3290                 break;
3291         default:
3292                 wpa_msg(wpa_s, MSG_INFO, "Unknown event %d", event);
3293                 break;
3294         }
3295 }