wpa_supplicant/wps_supplicant.c

   1 /*
   2  * wpa_supplicant / WPS integration
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "ieee802_11_defs.h"
  19 #include "wpa_common.h"
  20 #include "config.h"
  21 #include "eap_peer/eap.h"
  22 #include "wpa_supplicant_i.h"
  23 #include "eloop.h"
  24 #include "wpa_ctrl.h"
  25 #include "eap_common/eap_wsc_common.h"
  26 #include "wps/wps.h"
  27 #include "wps/wps_defs.h"
  28 #include "wps_supplicant.h"
  29
  30
  31 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx);
  32 static void wpas_clear_wps(struct wpa_supplicant *wpa_s);
  33
  34
  35 int wpas_wps_eapol_cb(struct wpa_supplicant *wpa_s)
  36 {
  37         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
  38
  39         if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPS && wpa_s->current_ssid &&
  40             !(wpa_s->current_ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  41                 wpa_printf(MSG_DEBUG, "WPS: Network configuration replaced - "
  42                            "try to associate with the received credential");
  43                 wpa_supplicant_deauthenticate(wpa_s,
  44                                               WLAN_REASON_DEAUTH_LEAVING);
  45                 wpa_s->reassociate = 1;
  46                 wpa_supplicant_req_scan(wpa_s, 0, 0);
  47                 return 1;
  48         }
  49
  50         return 0;
  51 }
  52
  53
  54 static int wpa_supplicant_wps_cred(void *ctx,
  55                                    const struct wps_credential *cred)
  56 {
  57         struct wpa_supplicant *wpa_s = ctx;
  58         struct wpa_ssid *ssid = wpa_s->current_ssid;
  59
  60         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_CRED_RECEIVED);
  61
  62         if (ssid && (ssid->key_mgmt & WPA_KEY_MGMT_WPS)) {
  63                 wpa_printf(MSG_DEBUG, "WPS: Replace WPS network block based "
  64                            "on the received credential");
  65                 os_free(ssid->eap.identity);
  66                 ssid->eap.identity = NULL;
  67                 ssid->eap.identity_len = 0;
  68                 os_free(ssid->eap.phase1);
  69                 ssid->eap.phase1 = NULL;
  70                 os_free(ssid->eap.eap_methods);
  71                 ssid->eap.eap_methods = NULL;
  72         } else {
  73                 wpa_printf(MSG_DEBUG, "WPS: Create a new network based on the "
  74                            "received credential");
  75                 ssid = wpa_config_add_network(wpa_s->conf);
  76                 if (ssid == NULL)
  77                         return -1;
  78         }
  79
  80         wpa_config_set_network_defaults(ssid);
  81
  82         os_free(ssid->ssid);
  83         ssid->ssid = os_malloc(cred->ssid_len);
  84         if (ssid->ssid) {
  85                 os_memcpy(ssid->ssid, cred->ssid, cred->ssid_len);
  86                 ssid->ssid_len = cred->ssid_len;
  87         }
  88
  89         switch (cred->encr_type) {
  90         case WPS_ENCR_NONE:
  91                 ssid->pairwise_cipher = ssid->group_cipher = WPA_CIPHER_NONE;
  92                 break;
  93         case WPS_ENCR_WEP:
  94                 ssid->pairwise_cipher = ssid->group_cipher =
  95                         WPA_CIPHER_WEP40 | WPA_CIPHER_WEP104;
  96                 if (cred->key_len > 0 && cred->key_len <= MAX_WEP_KEY_LEN &&
  97                     cred->key_idx < NUM_WEP_KEYS) {
  98                         os_memcpy(ssid->wep_key[cred->key_idx], cred->key,
  99                                   cred->key_len);
 100                         ssid->wep_key_len[cred->key_idx] = cred->key_len;
 101                         ssid->wep_tx_keyidx = cred->key_idx;
 102                 }
 103                 break;
 104         case WPS_ENCR_TKIP:
 105                 ssid->pairwise_cipher = WPA_CIPHER_TKIP;
 106                 ssid->group_cipher = WPA_CIPHER_TKIP;
 107                 break;
 108         case WPS_ENCR_AES:
 109                 ssid->pairwise_cipher = WPA_CIPHER_CCMP;
 110                 ssid->group_cipher = WPA_CIPHER_CCMP | WPA_CIPHER_TKIP;
 111                 break;
 112         }
 113
 114         switch (cred->auth_type) {
 115         case WPS_AUTH_OPEN:
 116                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 117                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 118                 ssid->proto = 0;
 119                 break;
 120         case WPS_AUTH_SHARED:
 121                 ssid->auth_alg = WPA_AUTH_ALG_SHARED;
 122                 ssid->key_mgmt = WPA_KEY_MGMT_NONE;
 123                 ssid->proto = 0;
 124                 break;
 125         case WPS_AUTH_WPAPSK:
 126                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 127                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 128                 ssid->proto = WPA_PROTO_WPA;
 129                 break;
 130         case WPS_AUTH_WPA:
 131                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 132                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 133                 ssid->proto = WPA_PROTO_WPA;
 134                 break;
 135         case WPS_AUTH_WPA2:
 136                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 137                 ssid->key_mgmt = WPA_KEY_MGMT_IEEE8021X;
 138                 ssid->proto = WPA_PROTO_RSN;
 139                 break;
 140         case WPS_AUTH_WPA2PSK:
 141                 ssid->auth_alg = WPA_AUTH_ALG_OPEN;
 142                 ssid->key_mgmt = WPA_KEY_MGMT_PSK;
 143                 ssid->proto = WPA_PROTO_RSN;
 144                 break;
 145         }
 146
 147         if (ssid->key_mgmt == WPA_KEY_MGMT_PSK) {
 148                 if (cred->key_len == 2 * PMK_LEN) {
 149                         if (hexstr2bin((const char *) cred->key, ssid->psk,
 150                                        PMK_LEN)) {
 151                                 wpa_printf(MSG_ERROR, "WPS: Invalid Network "
 152                                            "Key");
 153                                 return -1;
 154                         }
 155                         ssid->psk_set = 1;
 156                 } else if (cred->key_len >= 8 && cred->key_len < 2 * PMK_LEN) {
 157                         os_free(ssid->passphrase);
 158                         ssid->passphrase = os_malloc(cred->key_len + 1);
 159                         if (ssid->passphrase == NULL)
 160                                 return -1;
 161                         os_memcpy(ssid->passphrase, cred->key, cred->key_len);
 162                         ssid->passphrase[cred->key_len] = '\0';
 163                         wpa_config_update_psk(ssid);
 164                 } else {
 165                         wpa_printf(MSG_ERROR, "WPS: Invalid Network Key "
 166                                    "length %lu",
 167                                    (unsigned long) cred->key_len);
 168                         return -1;
 169                 }
 170         }
 171
 172 #ifndef CONFIG_NO_CONFIG_WRITE
 173         if (wpa_s->conf->update_config &&
 174             wpa_config_write(wpa_s->confname, wpa_s->conf)) {
 175                 wpa_printf(MSG_DEBUG, "WPS: Failed to update configuration");
 176                 return -1;
 177         }
 178 #endif /* CONFIG_NO_CONFIG_WRITE */
 179
 180         return 0;
 181 }
 182
 183
 184 static void wpa_supplicant_wps_event_m2d(struct wpa_supplicant *wpa_s,
 185                                          struct wps_event_m2d *m2d)
 186 {
 187         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_M2D
 188                 "dev_password_id=%d config_error=%d",
 189                 m2d->dev_password_id, m2d->config_error);
 190 }
 191
 192
 193 static void wpa_supplicant_wps_event_fail(struct wpa_supplicant *wpa_s,
 194                                           struct wps_event_fail *fail)
 195 {
 196         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_FAIL "msg=%d", fail->msg);
 197         wpas_clear_wps(wpa_s);
 198 }
 199
 200
 201 static void wpa_supplicant_wps_event_success(struct wpa_supplicant *wpa_s)
 202 {
 203         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_SUCCESS);
 204 }
 205
 206
 207 static void wpa_supplicant_wps_event(void *ctx, enum wps_event event,
 208                                      union wps_event_data *data)
 209 {
 210         struct wpa_supplicant *wpa_s = ctx;
 211         switch (event) {
 212         case WPS_EV_M2D:
 213                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 214                 break;
 215         case WPS_EV_FAIL:
 216                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 217                 break;
 218         case WPS_EV_SUCCESS:
 219                 wpa_supplicant_wps_event_success(wpa_s);
 220                 break;
 221         }
 222 }
 223
 224
 225 u8 wpas_wps_get_req_type(struct wpa_ssid *ssid)
 226 {
 227         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 228             eap_is_wps_pin_enrollee(&ssid->eap))
 229                 return WPS_REQ_ENROLLEE;
 230         else
 231                 return WPS_REQ_REGISTRAR;
 232 }
 233
 234
 235 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 236 {
 237         int id;
 238         struct wpa_ssid *ssid;
 239
 240         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 241
 242         /* Remove any existing WPS network from configuration */
 243         ssid = wpa_s->conf->ssid;
 244         while (ssid) {
 245                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 246                         if (ssid == wpa_s->current_ssid)
 247                                 wpa_s->current_ssid = NULL;
 248                         id = ssid->id;
 249                 } else
 250                         id = -1;
 251                 ssid = ssid->next;
 252                 if (id >= 0)
 253                         wpa_config_remove_network(wpa_s->conf, id);
 254         }
 255 }
 256
 257
 258 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 259 {
 260         struct wpa_supplicant *wpa_s = eloop_ctx;
 261         wpa_printf(MSG_DEBUG, "WPS: Requested operation timed out");
 262         wpas_clear_wps(wpa_s);
 263 }
 264
 265
 266 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 267                                               int registrar, const u8 *bssid)
 268 {
 269         struct wpa_ssid *ssid;
 270
 271         ssid = wpa_config_add_network(wpa_s->conf);
 272         if (ssid == NULL)
 273                 return NULL;
 274         wpa_config_set_network_defaults(ssid);
 275         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 276             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 277             wpa_config_set(ssid, "identity", registrar ?
 278                            "\"" WSC_ID_REGISTRAR "\"" :
 279                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 280                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 281                 return NULL;
 282         }
 283
 284         if (bssid) {
 285                 size_t i;
 286                 struct wpa_scan_res *res;
 287
 288                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 289                 ssid->bssid_set = 1;
 290
 291                 /* Try to get SSID from scan results */
 292                 if (wpa_s->scan_res == NULL &&
 293                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 294                         return ssid; /* Could not find any scan results */
 295
 296                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 297                         const u8 *ie;
 298
 299                         res = wpa_s->scan_res->res[i];
 300                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 301                                 continue;
 302
 303                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 304                         if (ie == NULL)
 305                                 break;
 306                         os_free(ssid->ssid);
 307                         ssid->ssid = os_malloc(ie[1]);
 308                         if (ssid->ssid == NULL)
 309                                 break;
 310                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 311                         ssid->ssid_len = ie[1];
 312                         break;
 313                 }
 314         }
 315
 316         return ssid;
 317 }
 318
 319
 320 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 321                              struct wpa_ssid *selected)
 322 {
 323         struct wpa_ssid *ssid;
 324
 325         /* Mark all other networks disabled and trigger reassociation */
 326         ssid = wpa_s->conf->ssid;
 327         while (ssid) {
 328                 ssid->disabled = ssid != selected;
 329                 ssid = ssid->next;
 330         }
 331         wpa_s->disconnected = 0;
 332         wpa_s->reassociate = 1;
 333         wpa_supplicant_req_scan(wpa_s, 0, 0);
 334 }
 335
 336
 337 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 338 {
 339         struct wpa_ssid *ssid;
 340         wpas_clear_wps(wpa_s);
 341         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 342         if (ssid == NULL)
 343                 return -1;
 344         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 345         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 346                                wpa_s, NULL);
 347         wpas_wps_reassoc(wpa_s, ssid);
 348         return 0;
 349 }
 350
 351
 352 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 353                        const char *pin)
 354 {
 355         struct wpa_ssid *ssid;
 356         char val[30];
 357         unsigned int rpin = 0;
 358
 359         wpas_clear_wps(wpa_s);
 360         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 361         if (ssid == NULL)
 362                 return -1;
 363         if (pin)
 364                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 365         else {
 366                 rpin = wps_generate_pin();
 367                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 368         }
 369         wpa_config_set(ssid, "phase1", val, 0);
 370         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 371                                wpa_s, NULL);
 372         wpas_wps_reassoc(wpa_s, ssid);
 373         return rpin;
 374 }
 375
 376
 377 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 378                        const char *pin)
 379 {
 380         struct wpa_ssid *ssid;
 381         char val[30];
 382
 383         if (!pin)
 384                 return -1;
 385         wpas_clear_wps(wpa_s);
 386         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 387         if (ssid == NULL)
 388                 return -1;
 389         os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 390         wpa_config_set(ssid, "phase1", val, 0);
 391         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 392                                wpa_s, NULL);
 393         wpas_wps_reassoc(wpa_s, ssid);
 394         return 0;
 395 }
 396
 397
 398 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 399 {
 400         struct wps_context *wps;
 401
 402         wps = os_zalloc(sizeof(*wps));
 403         if (wps == NULL)
 404                 return -1;
 405
 406         wps->cred_cb = wpa_supplicant_wps_cred;
 407         wps->event_cb = wpa_supplicant_wps_event;
 408         wps->cb_ctx = wpa_s;
 409
 410         wps->dev.device_name = wpa_s->conf->device_name;
 411         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 412         wps->dev.model_name = wpa_s->conf->model_name;
 413         wps->dev.model_number = wpa_s->conf->model_number;
 414         wps->dev.serial_number = wpa_s->conf->serial_number;
 415         if (wpa_s->conf->device_type) {
 416                 char *pos;
 417                 u8 oui[4];
 418                 /* <categ>-<OUI>-<subcateg> */
 419                 wps->dev.categ = atoi(wpa_s->conf->device_type);
 420                 pos = os_strchr(wpa_s->conf->device_type, '-');
 421                 if (pos == NULL) {
 422                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 423                         os_free(wps);
 424                         return -1;
 425                 }
 426                 pos++;
 427                 if (hexstr2bin(pos, oui, 4)) {
 428                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
 429                         os_free(wps);
 430                         return -1;
 431                 }
 432                 wps->dev.oui = WPA_GET_BE32(oui);
 433                 pos = os_strchr(pos, '-');
 434                 if (pos == NULL) {
 435                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 436                         os_free(wps);
 437                         return -1;
 438                 }
 439                 pos++;
 440                 wps->dev.sub_categ = atoi(pos);
 441         }
 442         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 443         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 444         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 445         os_memcpy(wps->uuid, wpa_s->conf->uuid, 16);
 446
 447         wpa_s->wps = wps;
 448
 449         return 0;
 450 }
 451
 452
 453 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 454 {
 455         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 456
 457         if (wpa_s->wps == NULL)
 458                 return;
 459
 460         os_free(wpa_s->wps->network_key);
 461         os_free(wpa_s->wps);
 462         wpa_s->wps = NULL;
 463 }
 464
 465
 466 int wpas_wps_ssid_bss_match(struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 467 {
 468         struct wpabuf *wps_ie;
 469
 470         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 471                 return -1;
 472
 473         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 474         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 475                 if (!wps_ie) {
 476                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 477                         return 0;
 478                 }
 479
 480                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 481                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 482                                    "without active PBC Registrar");
 483                         wpabuf_free(wps_ie);
 484                         return 0;
 485                 }
 486
 487                 /* TODO: overlap detection */
 488                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 489                            "(Active PBC)");
 490                 wpabuf_free(wps_ie);
 491                 return 1;
 492         }
 493
 494         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 495                 if (!wps_ie) {
 496                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 497                         return 0;
 498                 }
 499
 500                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 501                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 502                                    "without active PIN Registrar");
 503                         wpabuf_free(wps_ie);
 504                         return 0;
 505                 }
 506                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 507                            "(Active PIN)");
 508                 wpabuf_free(wps_ie);
 509                 return 1;
 510         }
 511
 512         if (wps_ie) {
 513                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 514                 wpabuf_free(wps_ie);
 515                 return 1;
 516         }
 517
 518         return -1;
 519 }
 520
 521
 522 int wpas_wps_ssid_wildcard_ok(struct wpa_ssid *ssid,
 523                               struct wpa_scan_res *bss)
 524 {
 525         struct wpabuf *wps_ie = NULL;
 526         int ret = 0;
 527
 528         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 529                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 530                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 531                         /* allow wildcard SSID for WPS PBC */
 532                         ret = 1;
 533                 }
 534         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 535                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 536                 if (wps_ie && wps_is_selected_pin_registrar(wps_ie)) {
 537                         /* allow wildcard SSID for WPS PIN */
 538                         ret = 1;
 539                 }
 540         }
 541
 542         if (!ret && ssid->bssid_set &&
 543             os_memcmp(ssid->bssid, bss->bssid, ETH_ALEN) == 0) {
 544                 /* allow wildcard SSID due to hardcoded BSSID match */
 545                 ret = 1;
 546         }
 547
 548         wpabuf_free(wps_ie);
 549
 550         return ret;
 551 }
 552
 553
 554 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
 555                               struct wpa_scan_res *selected,
 556                               struct wpa_ssid *ssid)
 557 {
 558         const u8 *sel_uuid, *uuid;
 559         size_t i;
 560         struct wpabuf *wps_ie;
 561         int ret = 0;
 562
 563         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
 564                 return 0;
 565
 566         /* Make sure that only one AP is in active PBC mode */
 567         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
 568         if (wps_ie)
 569                 sel_uuid = wps_get_uuid_e(wps_ie);
 570         else
 571                 sel_uuid = NULL;
 572         if (!sel_uuid) {
 573                 wpa_printf(MSG_DEBUG, "WPS: UUID-E not available for PBC "
 574                            "overlap detection");
 575                 wpabuf_free(wps_ie);
 576                 return 1;
 577         }
 578
 579         for (i = 0; i < wpa_s->scan_res->num; i++) {
 580                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 581                 struct wpabuf *ie;
 582                 if (bss == selected)
 583                         continue;
 584                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 585                 if (!ie)
 586                         continue;
 587                 if (!wps_is_selected_pbc_registrar(ie)) {
 588                         wpabuf_free(ie);
 589                         continue;
 590                 }
 591                 uuid = wps_get_uuid_e(ie);
 592                 if (uuid == NULL) {
 593                         wpa_printf(MSG_DEBUG, "WPS: UUID-E not available for "
 594                                    "PBC overlap detection (other BSS)");
 595                         ret = 1;
 596                         wpabuf_free(ie);
 597                         break;
 598                 }
 599                 if (os_memcmp(sel_uuid, uuid, 16) != 0) {
 600                         ret = 1; /* PBC overlap */
 601                         wpabuf_free(ie);
 602                         break;
 603                 }
 604
 605                 /* TODO: verify that this is reasonable dual-band situation */
 606
 607                 wpabuf_free(ie);
 608         }
 609
 610         wpabuf_free(wps_ie);
 611
 612         return ret;
 613 }
 614
 615
 616 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
 617 {
 618         size_t i;
 619
 620         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
 621                 return;
 622
 623         for (i = 0; i < wpa_s->scan_res->num; i++) {
 624                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 625                 struct wpabuf *ie;
 626                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 627                 if (!ie)
 628                         continue;
 629                 if (wps_is_selected_pbc_registrar(ie))
 630                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
 631                 else if (wps_is_selected_pin_registrar(ie))
 632                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
 633                 else
 634                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
 635                 wpabuf_free(ie);
 636                 break;
 637         }
 638 }
 639
 640
 641 int wpas_wps_searching(struct wpa_supplicant *wpa_s)
 642 {
 643         struct wpa_ssid *ssid;
 644
 645         for (ssid = wpa_s->conf->ssid; ssid; ssid = ssid->next) {
 646                 if ((ssid->key_mgmt & WPA_KEY_MGMT_WPS) && !ssid->disabled)
 647                         return 1;
 648         }
 649
 650         return 0;
 651 }