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(void *ctx, enum wps_event event,
 202                                      union wps_event_data *data)
 203 {
 204         struct wpa_supplicant *wpa_s = ctx;
 205         switch (event) {
 206         case WPS_EV_M2D:
 207                 wpa_supplicant_wps_event_m2d(wpa_s, &data->m2d);
 208                 break;
 209         case WPS_EV_FAIL:
 210                 wpa_supplicant_wps_event_fail(wpa_s, &data->fail);
 211                 break;
 212         }
 213 }
 214
 215
 216 u8 wpas_wps_get_req_type(struct wpa_ssid *ssid)
 217 {
 218         if (eap_is_wps_pbc_enrollee(&ssid->eap) ||
 219             eap_is_wps_pin_enrollee(&ssid->eap))
 220                 return WPS_REQ_ENROLLEE;
 221         else
 222                 return WPS_REQ_REGISTRAR;
 223 }
 224
 225
 226 static void wpas_clear_wps(struct wpa_supplicant *wpa_s)
 227 {
 228         int id;
 229         struct wpa_ssid *ssid;
 230
 231         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 232
 233         /* Remove any existing WPS network from configuration */
 234         ssid = wpa_s->conf->ssid;
 235         while (ssid) {
 236                 if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
 237                         if (ssid == wpa_s->current_ssid)
 238                                 wpa_s->current_ssid = NULL;
 239                         id = ssid->id;
 240                 } else
 241                         id = -1;
 242                 ssid = ssid->next;
 243                 if (id >= 0)
 244                         wpa_config_remove_network(wpa_s->conf, id);
 245         }
 246 }
 247
 248
 249 static void wpas_wps_timeout(void *eloop_ctx, void *timeout_ctx)
 250 {
 251         struct wpa_supplicant *wpa_s = eloop_ctx;
 252         wpa_printf(MSG_DEBUG, "WPS: Requested operation timed out");
 253         wpas_clear_wps(wpa_s);
 254 }
 255
 256
 257 static struct wpa_ssid * wpas_wps_add_network(struct wpa_supplicant *wpa_s,
 258                                               int registrar, const u8 *bssid)
 259 {
 260         struct wpa_ssid *ssid;
 261
 262         ssid = wpa_config_add_network(wpa_s->conf);
 263         if (ssid == NULL)
 264                 return NULL;
 265         wpa_config_set_network_defaults(ssid);
 266         if (wpa_config_set(ssid, "key_mgmt", "WPS", 0) < 0 ||
 267             wpa_config_set(ssid, "eap", "WSC", 0) < 0 ||
 268             wpa_config_set(ssid, "identity", registrar ?
 269                            "\"" WSC_ID_REGISTRAR "\"" :
 270                            "\"" WSC_ID_ENROLLEE "\"", 0) < 0) {
 271                 wpa_config_remove_network(wpa_s->conf, ssid->id);
 272                 return NULL;
 273         }
 274
 275         if (bssid) {
 276                 size_t i;
 277                 struct wpa_scan_res *res;
 278
 279                 os_memcpy(ssid->bssid, bssid, ETH_ALEN);
 280
 281                 /* Try to get SSID from scan results */
 282                 if (wpa_s->scan_res == NULL &&
 283                     wpa_supplicant_get_scan_results(wpa_s) < 0)
 284                         return ssid; /* Could not find any scan results */
 285
 286                 for (i = 0; i < wpa_s->scan_res->num; i++) {
 287                         const u8 *ie;
 288
 289                         res = wpa_s->scan_res->res[i];
 290                         if (os_memcmp(bssid, res->bssid, ETH_ALEN) != 0)
 291                                 continue;
 292
 293                         ie = wpa_scan_get_ie(res, WLAN_EID_SSID);
 294                         if (ie == NULL)
 295                                 break;
 296                         os_free(ssid->ssid);
 297                         ssid->ssid = os_malloc(ie[1]);
 298                         if (ssid->ssid == NULL)
 299                                 break;
 300                         os_memcpy(ssid->ssid, ie + 2, ie[1]);
 301                         ssid->ssid_len = ie[1];
 302                         break;
 303                 }
 304         }
 305
 306         return ssid;
 307 }
 308
 309
 310 static void wpas_wps_reassoc(struct wpa_supplicant *wpa_s,
 311                              struct wpa_ssid *selected)
 312 {
 313         struct wpa_ssid *ssid;
 314
 315         /* Mark all other networks disabled and trigger reassociation */
 316         ssid = wpa_s->conf->ssid;
 317         while (ssid) {
 318                 ssid->disabled = ssid != selected;
 319                 ssid = ssid->next;
 320         }
 321         wpa_s->disconnected = 0;
 322         wpa_s->reassociate = 1;
 323         wpa_supplicant_req_scan(wpa_s, 0, 0);
 324 }
 325
 326
 327 int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid)
 328 {
 329         struct wpa_ssid *ssid;
 330         wpas_clear_wps(wpa_s);
 331         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 332         if (ssid == NULL)
 333                 return -1;
 334         wpa_config_set(ssid, "phase1", "\"pbc=1\"", 0);
 335         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 336                                wpa_s, NULL);
 337         wpas_wps_reassoc(wpa_s, ssid);
 338         return 0;
 339 }
 340
 341
 342 int wpas_wps_start_pin(struct wpa_supplicant *wpa_s, const u8 *bssid,
 343                        const char *pin)
 344 {
 345         struct wpa_ssid *ssid;
 346         char val[30];
 347         unsigned int rpin = 0;
 348
 349         wpas_clear_wps(wpa_s);
 350         ssid = wpas_wps_add_network(wpa_s, 0, bssid);
 351         if (ssid == NULL)
 352                 return -1;
 353         if (pin)
 354                 os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 355         else {
 356                 rpin = wps_generate_pin();
 357                 os_snprintf(val, sizeof(val), "\"pin=%08d\"", rpin);
 358         }
 359         wpa_config_set(ssid, "phase1", val, 0);
 360         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 361                                wpa_s, NULL);
 362         wpas_wps_reassoc(wpa_s, ssid);
 363         return rpin;
 364 }
 365
 366
 367 int wpas_wps_start_reg(struct wpa_supplicant *wpa_s, const u8 *bssid,
 368                        const char *pin)
 369 {
 370         struct wpa_ssid *ssid;
 371         char val[30];
 372
 373         if (!pin)
 374                 return -1;
 375         wpas_clear_wps(wpa_s);
 376         ssid = wpas_wps_add_network(wpa_s, 1, bssid);
 377         if (ssid == NULL)
 378                 return -1;
 379         os_snprintf(val, sizeof(val), "\"pin=%s\"", pin);
 380         wpa_config_set(ssid, "phase1", val, 0);
 381         eloop_register_timeout(WPS_PBC_WALK_TIME, 0, wpas_wps_timeout,
 382                                wpa_s, NULL);
 383         wpas_wps_reassoc(wpa_s, ssid);
 384         return 0;
 385 }
 386
 387
 388 int wpas_wps_init(struct wpa_supplicant *wpa_s)
 389 {
 390         struct wps_context *wps;
 391
 392         wps = os_zalloc(sizeof(*wps));
 393         if (wps == NULL)
 394                 return -1;
 395
 396         wps->cred_cb = wpa_supplicant_wps_cred;
 397         wps->event_cb = wpa_supplicant_wps_event;
 398         wps->cb_ctx = wpa_s;
 399
 400         wps->dev.device_name = wpa_s->conf->device_name;
 401         wps->dev.manufacturer = wpa_s->conf->manufacturer;
 402         wps->dev.model_name = wpa_s->conf->model_name;
 403         wps->dev.model_number = wpa_s->conf->model_number;
 404         wps->dev.serial_number = wpa_s->conf->serial_number;
 405         if (wpa_s->conf->device_type) {
 406                 char *pos;
 407                 u8 oui[4];
 408                 /* <categ>-<OUI>-<subcateg> */
 409                 wps->dev.categ = atoi(wpa_s->conf->device_type);
 410                 pos = os_strchr(wpa_s->conf->device_type, '-');
 411                 if (pos == NULL) {
 412                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 413                         os_free(wps);
 414                         return -1;
 415                 }
 416                 pos++;
 417                 if (hexstr2bin(pos, oui, 4)) {
 418                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
 419                         os_free(wps);
 420                         return -1;
 421                 }
 422                 wps->dev.oui = WPA_GET_BE32(oui);
 423                 pos = os_strchr(pos, '-');
 424                 if (pos == NULL) {
 425                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 426                         os_free(wps);
 427                         return -1;
 428                 }
 429                 pos++;
 430                 wps->dev.sub_categ = atoi(pos);
 431         }
 432         wps->dev.os_version = WPA_GET_BE32(wpa_s->conf->os_version);
 433         wps->dev.rf_bands = WPS_RF_24GHZ | WPS_RF_50GHZ; /* TODO: config */
 434         os_memcpy(wps->dev.mac_addr, wpa_s->own_addr, ETH_ALEN);
 435         os_memcpy(wps->uuid, wpa_s->conf->uuid, 16);
 436
 437         wpa_s->wps = wps;
 438
 439         return 0;
 440 }
 441
 442
 443 void wpas_wps_deinit(struct wpa_supplicant *wpa_s)
 444 {
 445         eloop_cancel_timeout(wpas_wps_timeout, wpa_s, NULL);
 446
 447         if (wpa_s->wps == NULL)
 448                 return;
 449
 450         os_free(wpa_s->wps->network_key);
 451         os_free(wpa_s->wps);
 452         wpa_s->wps = NULL;
 453 }
 454
 455
 456 int wpas_wps_ssid_bss_match(struct wpa_ssid *ssid, struct wpa_scan_res *bss)
 457 {
 458         struct wpabuf *wps_ie;
 459
 460         if (!(ssid->key_mgmt & WPA_KEY_MGMT_WPS))
 461                 return -1;
 462
 463         wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 464         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 465                 if (!wps_ie) {
 466                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 467                         return 0;
 468                 }
 469
 470                 if (!wps_is_selected_pbc_registrar(wps_ie)) {
 471                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 472                                    "without active PBC Registrar");
 473                         wpabuf_free(wps_ie);
 474                         return 0;
 475                 }
 476
 477                 /* TODO: overlap detection */
 478                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 479                            "(Active PBC)");
 480                 wpabuf_free(wps_ie);
 481                 return 1;
 482         }
 483
 484         if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 485                 if (!wps_ie) {
 486                         wpa_printf(MSG_DEBUG, "   skip - non-WPS AP");
 487                         return 0;
 488                 }
 489
 490                 if (!wps_is_selected_pin_registrar(wps_ie)) {
 491                         wpa_printf(MSG_DEBUG, "   skip - WPS AP "
 492                                    "without active PIN Registrar");
 493                         wpabuf_free(wps_ie);
 494                         return 0;
 495                 }
 496                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE "
 497                            "(Active PIN)");
 498                 wpabuf_free(wps_ie);
 499                 return 1;
 500         }
 501
 502         if (wps_ie) {
 503                 wpa_printf(MSG_DEBUG, "   selected based on WPS IE");
 504                 wpabuf_free(wps_ie);
 505                 return 1;
 506         }
 507
 508         return -1;
 509 }
 510
 511
 512 int wpas_wps_ssid_wildcard_ok(struct wpa_ssid *ssid,
 513                               struct wpa_scan_res *bss)
 514 {
 515         struct wpabuf *wps_ie = NULL;
 516         int ret = 0;
 517
 518         if (eap_is_wps_pbc_enrollee(&ssid->eap)) {
 519                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 520                 if (wps_ie && wps_is_selected_pbc_registrar(wps_ie)) {
 521                         /* allow wildcard SSID for WPS PBC */
 522                         ret = 1;
 523                 }
 524         } else if (eap_is_wps_pin_enrollee(&ssid->eap)) {
 525                 wps_ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 526                 if (wps_ie && wps_is_selected_pin_registrar(wps_ie)) {
 527                         /* allow wildcard SSID for WPS PIN */
 528                         ret = 1;
 529                 }
 530         }
 531
 532         wpabuf_free(wps_ie);
 533
 534         return ret;
 535 }
 536
 537
 538 int wpas_wps_scan_pbc_overlap(struct wpa_supplicant *wpa_s,
 539                               struct wpa_scan_res *selected,
 540                               struct wpa_ssid *ssid)
 541 {
 542         const u8 *sel_uuid, *uuid;
 543         size_t i;
 544         struct wpabuf *wps_ie;
 545         int ret = 0;
 546
 547         if (!eap_is_wps_pbc_enrollee(&ssid->eap))
 548                 return 0;
 549
 550         /* Make sure that only one AP is in active PBC mode */
 551         wps_ie = wpa_scan_get_vendor_ie_multi(selected, WPS_IE_VENDOR_TYPE);
 552         if (wps_ie)
 553                 sel_uuid = wps_get_uuid_e(wps_ie);
 554         else
 555                 sel_uuid = NULL;
 556         if (!sel_uuid) {
 557                 wpa_printf(MSG_DEBUG, "WPS: UUID-E not available for PBC "
 558                            "overlap detection");
 559                 wpabuf_free(wps_ie);
 560                 return 1;
 561         }
 562
 563         for (i = 0; i < wpa_s->scan_res->num; i++) {
 564                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 565                 struct wpabuf *ie;
 566                 if (bss == selected)
 567                         continue;
 568                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 569                 if (!ie)
 570                         continue;
 571                 if (!wps_is_selected_pbc_registrar(ie)) {
 572                         wpabuf_free(ie);
 573                         continue;
 574                 }
 575                 uuid = wps_get_uuid_e(ie);
 576                 if (uuid == NULL) {
 577                         wpa_printf(MSG_DEBUG, "WPS: UUID-E not available for "
 578                                    "PBC overlap detection (other BSS)");
 579                         ret = 1;
 580                         wpabuf_free(ie);
 581                         break;
 582                 }
 583                 if (os_memcmp(sel_uuid, uuid, 16) != 0) {
 584                         ret = 1; /* PBC overlap */
 585                         wpabuf_free(ie);
 586                         break;
 587                 }
 588
 589                 /* TODO: verify that this is reasonable dual-band situation */
 590
 591                 wpabuf_free(ie);
 592         }
 593
 594         wpabuf_free(wps_ie);
 595
 596         return ret;
 597 }
 598
 599
 600 void wpas_wps_notify_scan_results(struct wpa_supplicant *wpa_s)
 601 {
 602         size_t i;
 603
 604         if (wpa_s->disconnected || wpa_s->wpa_state >= WPA_ASSOCIATED)
 605                 return;
 606
 607         for (i = 0; i < wpa_s->scan_res->num; i++) {
 608                 struct wpa_scan_res *bss = wpa_s->scan_res->res[i];
 609                 struct wpabuf *ie;
 610                 ie = wpa_scan_get_vendor_ie_multi(bss, WPS_IE_VENDOR_TYPE);
 611                 if (!ie)
 612                         continue;
 613                 if (wps_is_selected_pbc_registrar(ie))
 614                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PBC);
 615                 else if (wps_is_selected_pin_registrar(ie))
 616                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE_PIN);
 617                 else
 618                         wpa_msg(wpa_s, MSG_INFO, WPS_EVENT_AP_AVAILABLE);
 619                 wpabuf_free(ie);
 620                 break;
 621         }
 622 }