hostapd/wps_hostapd.c

   1 /*
   2  * hostapd / 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 "hostapd.h"
  18 #include "driver_i.h"
  19 #include "eloop.h"
  20 #include "uuid.h"
  21 #include "wpa_ctrl.h"
  22 #include "ctrl_iface.h"
  23 #include "ieee802_11_defs.h"
  24 #include "wps/wps.h"
  25 #include "wps/wps_defs.h"
  26 #include "wps/wps_dev_attr.h"
  27 #include "wps_hostapd.h"
  28
  29
  30 static int hostapd_wps_new_psk_cb(void *ctx, const u8 *mac_addr, const u8 *psk,
  31                                   size_t psk_len)
  32 {
  33         struct hostapd_data *hapd = ctx;
  34         struct hostapd_wpa_psk *p;
  35         struct hostapd_ssid *ssid = &hapd->conf->ssid;
  36
  37         wpa_printf(MSG_DEBUG, "Received new WPA/WPA2-PSK from WPS for STA "
  38                    MACSTR, MAC2STR(mac_addr));
  39         wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
  40
  41         if (psk_len != PMK_LEN) {
  42                 wpa_printf(MSG_DEBUG, "Unexpected PSK length %lu",
  43                            (unsigned long) psk_len);
  44                 return -1;
  45         }
  46
  47         /* Add the new PSK to runtime PSK list */
  48         p = os_zalloc(sizeof(*p));
  49         if (p == NULL)
  50                 return -1;
  51         os_memcpy(p->addr, mac_addr, ETH_ALEN);
  52         os_memcpy(p->psk, psk, PMK_LEN);
  53
  54         p->next = ssid->wpa_psk;
  55         ssid->wpa_psk = p;
  56
  57         if (ssid->wpa_psk_file) {
  58                 FILE *f;
  59                 char hex[PMK_LEN * 2 + 1];
  60                 /* Add the new PSK to PSK list file */
  61                 f = fopen(ssid->wpa_psk_file, "a");
  62                 if (f == NULL) {
  63                         wpa_printf(MSG_DEBUG, "Failed to add the PSK to "
  64                                    "'%s'", ssid->wpa_psk_file);
  65                         return -1;
  66                 }
  67
  68                 wpa_snprintf_hex(hex, sizeof(hex), psk, psk_len);
  69                 fprintf(f, MACSTR " %s\n", MAC2STR(mac_addr), hex);
  70                 fclose(f);
  71         }
  72
  73         return 0;
  74 }
  75
  76
  77 static int hostapd_wps_set_ie_cb(void *ctx, const u8 *beacon_ie,
  78                                  size_t beacon_ie_len, const u8 *probe_resp_ie,
  79                                  size_t probe_resp_ie_len)
  80 {
  81         struct hostapd_data *hapd = ctx;
  82
  83         os_free(hapd->wps_beacon_ie);
  84         if (beacon_ie_len == 0) {
  85                 hapd->wps_beacon_ie = NULL;
  86                 hapd->wps_beacon_ie_len = 0;
  87         } else {
  88                 hapd->wps_beacon_ie = os_malloc(beacon_ie_len);
  89                 if (hapd->wps_beacon_ie == NULL) {
  90                         hapd->wps_beacon_ie_len = 0;
  91                         return -1;
  92                 }
  93                 os_memcpy(hapd->wps_beacon_ie, beacon_ie, beacon_ie_len);
  94                 hapd->wps_beacon_ie_len = beacon_ie_len;
  95         }
  96         hostapd_set_wps_beacon_ie(hapd, hapd->wps_beacon_ie,
  97                                   hapd->wps_beacon_ie_len);
  98
  99         os_free(hapd->wps_probe_resp_ie);
 100         if (probe_resp_ie_len == 0) {
 101                 hapd->wps_probe_resp_ie = NULL;
 102                 hapd->wps_probe_resp_ie_len = 0;
 103         } else {
 104                 hapd->wps_probe_resp_ie = os_malloc(probe_resp_ie_len);
 105                 if (hapd->wps_probe_resp_ie == NULL) {
 106                         hapd->wps_probe_resp_ie_len = 0;
 107                         return -1;
 108                 }
 109                 os_memcpy(hapd->wps_probe_resp_ie, probe_resp_ie,
 110                           probe_resp_ie_len);
 111                 hapd->wps_probe_resp_ie_len = probe_resp_ie_len;
 112         }
 113         hostapd_set_wps_probe_resp_ie(hapd, hapd->wps_probe_resp_ie,
 114                                       hapd->wps_probe_resp_ie_len);
 115
 116         return 0;
 117 }
 118
 119
 120 static void hostapd_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
 121                                       const struct wps_device_data *dev)
 122 {
 123         struct hostapd_data *hapd = ctx;
 124         char uuid[40], txt[400];
 125         int len;
 126         if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
 127                 return;
 128         wpa_printf(MSG_DEBUG, "WPS: PIN needed for E-UUID %s", uuid);
 129         len = os_snprintf(txt, sizeof(txt), WPS_EVENT_PIN_NEEDED
 130                           "%s " MACSTR " [%s|%s|%s|%s|%s|%d-%08X-%d]",
 131                           uuid, MAC2STR(dev->mac_addr), dev->device_name,
 132                           dev->manufacturer, dev->model_name,
 133                           dev->model_number, dev->serial_number,
 134                           dev->categ, dev->oui, dev->sub_categ);
 135         if (len > 0 && len < (int) sizeof(txt))
 136                 hostapd_ctrl_iface_send(hapd, MSG_INFO, txt, len);
 137
 138         if (hapd->conf->wps_pin_requests) {
 139                 FILE *f;
 140                 struct os_time t;
 141                 f = fopen(hapd->conf->wps_pin_requests, "a");
 142                 if (f == NULL)
 143                         return;
 144                 os_get_time(&t);
 145                 fprintf(f, "%ld\t%s\t" MACSTR "\t%s\t%s\t%s\t%s\t%s"
 146                         "\t%d-%08X-%d\n",
 147                         t.sec, uuid, MAC2STR(dev->mac_addr), dev->device_name,
 148                         dev->manufacturer, dev->model_name, dev->model_number,
 149                         dev->serial_number,
 150                         dev->categ, dev->oui, dev->sub_categ);
 151                 fclose(f);
 152         }
 153 }
 154
 155
 156 static int str_starts(const char *str, const char *start)
 157 {
 158         return os_strncmp(str, start, os_strlen(start)) == 0;
 159 }
 160
 161
 162 static void wps_reload_config(void *eloop_data, void *user_ctx)
 163 {
 164         struct hostapd_iface *iface = eloop_data;
 165
 166         wpa_printf(MSG_DEBUG, "WPS: Reload configuration data");
 167         if (hostapd_reload_config(iface) < 0) {
 168                 wpa_printf(MSG_WARNING, "WPS: Failed to reload the updated "
 169                            "configuration");
 170         }
 171 }
 172
 173
 174 static int hostapd_wps_cred_cb(void *ctx, const struct wps_credential *cred)
 175 {
 176         struct hostapd_data *hapd = ctx;
 177         FILE *oconf, *nconf;
 178         size_t len, i;
 179         char *tmp_fname;
 180         char buf[1024];
 181         int multi_bss;
 182         int wpa;
 183
 184         wpa_printf(MSG_DEBUG, "WPS: Received new AP Settings");
 185         wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
 186         wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
 187                    cred->auth_type);
 188         wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
 189         wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
 190         wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
 191                         cred->key, cred->key_len);
 192         wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
 193                    MAC2STR(cred->mac_addr));
 194
 195         hostapd_ctrl_iface_send(hapd, MSG_INFO, WPS_EVENT_NEW_AP_SETTINGS,
 196                                 os_strlen(WPS_EVENT_NEW_AP_SETTINGS));
 197
 198         len = os_strlen(hapd->iface->config_fname) + 5;
 199         tmp_fname = os_malloc(len);
 200         if (tmp_fname == NULL)
 201                 return -1;
 202         os_snprintf(tmp_fname, len, "%s-new", hapd->iface->config_fname);
 203
 204         oconf = fopen(hapd->iface->config_fname, "r");
 205         if (oconf == NULL) {
 206                 wpa_printf(MSG_WARNING, "WPS: Could not open current "
 207                            "configuration file");
 208                 os_free(tmp_fname);
 209                 return -1;
 210         }
 211
 212         nconf = fopen(tmp_fname, "w");
 213         if (nconf == NULL) {
 214                 wpa_printf(MSG_WARNING, "WPS: Could not write updated "
 215                            "configuration file");
 216                 os_free(tmp_fname);
 217                 fclose(oconf);
 218                 return -1;
 219         }
 220
 221         fprintf(nconf, "# WPS configuration - START\n");
 222
 223         fprintf(nconf, "wps_state=2\n");
 224
 225         fprintf(nconf, "ssid=");
 226         for (i = 0; i < cred->ssid_len; i++)
 227                 fputc(cred->ssid[i], nconf);
 228         fprintf(nconf, "\n");
 229
 230         if ((cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK)) &&
 231             (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK)))
 232                 wpa = 3;
 233         else if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK))
 234                 wpa = 2;
 235         else if (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK))
 236                 wpa = 1;
 237         else
 238                 wpa = 0;
 239
 240         if (wpa) {
 241                 char *prefix;
 242                 fprintf(nconf, "wpa=%d\n", wpa);
 243
 244                 fprintf(nconf, "wpa_key_mgmt=");
 245                 prefix = "";
 246                 if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA)) {
 247                         fprintf(nconf, "WPA-EAP");
 248                         prefix = " ";
 249                 }
 250                 if (cred->auth_type & (WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK))
 251                         fprintf(nconf, "%sWPA-PSK", prefix);
 252                 fprintf(nconf, "\n");
 253
 254                 fprintf(nconf, "wpa_pairwise=");
 255                 prefix = "";
 256                 if (cred->encr_type & WPS_ENCR_AES) {
 257                         fprintf(nconf, "CCMP");
 258                         prefix = " ";
 259                 }
 260                 if (cred->encr_type & WPS_ENCR_TKIP) {
 261                         fprintf(nconf, "%sTKIP", prefix);
 262                 }
 263                 fprintf(nconf, "\n");
 264
 265                 if (cred->key_len >= 8 && cred->key_len < 64) {
 266                         fprintf(nconf, "wpa_passphrase=");
 267                         for (i = 0; i < cred->key_len; i++)
 268                                 fputc(cred->key[i], nconf);
 269                         fprintf(nconf, "\n");
 270                 } else if (cred->key_len == 64) {
 271                         fprintf(nconf, "wpa_psk=");
 272                         for (i = 0; i < cred->key_len; i++)
 273                                 fputc(cred->key[i], nconf);
 274                         fprintf(nconf, "\n");
 275                 } else {
 276                         wpa_printf(MSG_WARNING, "WPS: Invalid key length %lu "
 277                                    "for WPA/WPA2",
 278                                    (unsigned long) cred->key_len);
 279                 }
 280
 281                 fprintf(nconf, "auth_algs=1\n");
 282         } else {
 283                 if ((cred->auth_type & WPS_AUTH_OPEN) &&
 284                     (cred->auth_type & WPS_AUTH_SHARED))
 285                         fprintf(nconf, "auth_algs=3\n");
 286                 else if (cred->auth_type & WPS_AUTH_SHARED)
 287                         fprintf(nconf, "auth_algs=2\n");
 288                 else
 289                         fprintf(nconf, "auth_algs=1\n");
 290
 291                 if (cred->encr_type & WPS_ENCR_WEP && cred->key_idx < 4) {
 292                         fprintf(nconf, "wep_default_key=%d\n", cred->key_idx);
 293                         fprintf(nconf, "wep_key%d=", cred->key_idx);
 294                         if (cred->key_len != 10 && cred->key_len != 26)
 295                                 fputc('"', nconf);
 296                         for (i = 0; i < cred->key_len; i++)
 297                                 fputc(cred->key[i], nconf);
 298                         if (cred->key_len != 10 && cred->key_len != 26)
 299                                 fputc('"', nconf);
 300                         fprintf(nconf, "\n");
 301                 }
 302         }
 303
 304         fprintf(nconf, "# WPS configuration - END\n");
 305
 306         multi_bss = 0;
 307         while (fgets(buf, sizeof(buf), oconf)) {
 308                 if (os_strncmp(buf, "bss=", 4) == 0)
 309                         multi_bss = 1;
 310                 if (!multi_bss &&
 311                     (str_starts(buf, "ssid=") ||
 312                      str_starts(buf, "auth_algs=") ||
 313                      str_starts(buf, "wps_state=") ||
 314                      str_starts(buf, "wpa=") ||
 315                      str_starts(buf, "wpa_psk=") ||
 316                      str_starts(buf, "wpa_pairwise=") ||
 317                      str_starts(buf, "rsn_pairwise=") ||
 318                      str_starts(buf, "wpa_key_mgmt=") ||
 319                      str_starts(buf, "wpa_passphrase="))) {
 320                         fprintf(nconf, "#WPS# %s", buf);
 321                 } else
 322                         fprintf(nconf, "%s", buf);
 323         }
 324
 325         fclose(nconf);
 326         fclose(oconf);
 327
 328         if (rename(tmp_fname, hapd->iface->config_fname) < 0) {
 329                 wpa_printf(MSG_WARNING, "WPS: Failed to rename the updated "
 330                            "configuration file: %s", strerror(errno));
 331                 os_free(tmp_fname);
 332                 return -1;
 333         }
 334
 335         os_free(tmp_fname);
 336
 337         /* Schedule configuration reload after short period of time to allow
 338          * EAP-WSC to be finished.
 339          */
 340         eloop_register_timeout(0, 100000, wps_reload_config, hapd->iface,
 341                                NULL);
 342
 343         /* TODO: dualband AP may need to update multiple configuration files */
 344
 345         wpa_printf(MSG_DEBUG, "WPS: AP configuration updated");
 346
 347         return 0;
 348 }
 349
 350
 351 static void hostapd_wps_clear_ies(struct hostapd_data *hapd)
 352 {
 353         os_free(hapd->wps_beacon_ie);
 354         hapd->wps_beacon_ie = NULL;
 355         hapd->wps_beacon_ie_len = 0;
 356         hostapd_set_wps_beacon_ie(hapd, NULL, 0);
 357
 358         os_free(hapd->wps_probe_resp_ie);
 359         hapd->wps_probe_resp_ie = NULL;
 360         hapd->wps_probe_resp_ie_len = 0;
 361         hostapd_set_wps_probe_resp_ie(hapd, NULL, 0);
 362 }
 363
 364
 365 int hostapd_init_wps(struct hostapd_data *hapd,
 366                      struct hostapd_bss_config *conf)
 367 {
 368         struct wps_context *wps;
 369         struct wps_registrar_config cfg;
 370
 371         if (conf->wps_state == 0) {
 372                 hostapd_wps_clear_ies(hapd);
 373                 return 0;
 374         }
 375
 376         wps = os_zalloc(sizeof(*wps));
 377         if (wps == NULL)
 378                 return -1;
 379
 380         wps->cred_cb = hostapd_wps_cred_cb;
 381         wps->cb_ctx = hapd;
 382
 383         os_memset(&cfg, 0, sizeof(cfg));
 384         wps->wps_state = hapd->conf->wps_state;
 385         wps->ap_setup_locked = hapd->conf->ap_setup_locked;
 386         if (is_nil_uuid(hapd->conf->uuid)) {
 387                 uuid_gen_mac_addr(hapd->own_addr, wps->uuid);
 388                 wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC address",
 389                             wps->uuid, UUID_LEN);
 390         } else
 391                 os_memcpy(wps->uuid, hapd->conf->uuid, UUID_LEN);
 392         wps->ssid_len = hapd->conf->ssid.ssid_len;
 393         os_memcpy(wps->ssid, hapd->conf->ssid.ssid, wps->ssid_len);
 394         wps->ap = 1;
 395         os_memcpy(wps->dev.mac_addr, hapd->own_addr, ETH_ALEN);
 396         wps->dev.device_name = os_strdup(hapd->conf->device_name);
 397         wps->dev.manufacturer = os_strdup(hapd->conf->manufacturer);
 398         wps->dev.model_name = os_strdup(hapd->conf->model_name);
 399         wps->dev.model_number = os_strdup(hapd->conf->model_number);
 400         wps->dev.serial_number = os_strdup(hapd->conf->serial_number);
 401         if (hapd->conf->config_methods) {
 402                 char *m = hapd->conf->config_methods;
 403                 if (os_strstr(m, "label"))
 404                         wps->config_methods |= WPS_CONFIG_LABEL;
 405                 if (os_strstr(m, "display"))
 406                         wps->config_methods |= WPS_CONFIG_DISPLAY;
 407                 if (os_strstr(m, "push_button"))
 408                         wps->config_methods |= WPS_CONFIG_PUSHBUTTON;
 409                 if (os_strstr(m, "keypad"))
 410                         wps->config_methods |= WPS_CONFIG_KEYPAD;
 411         }
 412         if (hapd->conf->device_type) {
 413                 char *pos;
 414                 u8 oui[4];
 415                 /* <categ>-<OUI>-<subcateg> */
 416                 wps->dev.categ = atoi(hapd->conf->device_type);
 417                 pos = os_strchr(hapd->conf->device_type, '-');
 418                 if (pos == NULL) {
 419                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 420                         os_free(wps);
 421                         return -1;
 422                 }
 423                 pos++;
 424                 if (hexstr2bin(pos, oui, 4)) {
 425                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type OUI");
 426                         os_free(wps);
 427                         return -1;
 428                 }
 429                 wps->dev.oui = WPA_GET_BE32(oui);
 430                 pos = os_strchr(pos, '-');
 431                 if (pos == NULL) {
 432                         wpa_printf(MSG_ERROR, "WPS: Invalid device_type");
 433                         os_free(wps);
 434                         return -1;
 435                 }
 436                 pos++;
 437                 wps->dev.sub_categ = atoi(pos);
 438         }
 439         wps->dev.os_version = WPA_GET_BE32(hapd->conf->os_version);
 440         wps->dev.rf_bands = hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211A ?
 441                 WPS_RF_50GHZ : WPS_RF_24GHZ; /* FIX: dualband AP */
 442
 443         if (conf->wpa & WPA_PROTO_RSN) {
 444                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK)
 445                         wps->auth_types |= WPS_AUTH_WPA2PSK;
 446                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X)
 447                         wps->auth_types |= WPS_AUTH_WPA2;
 448
 449                 if (conf->rsn_pairwise & WPA_CIPHER_CCMP)
 450                         wps->encr_types |= WPS_ENCR_AES;
 451                 if (conf->rsn_pairwise & WPA_CIPHER_TKIP)
 452                         wps->encr_types |= WPS_ENCR_TKIP;
 453         }
 454
 455         if (conf->wpa & WPA_PROTO_WPA) {
 456                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK)
 457                         wps->auth_types |= WPS_AUTH_WPAPSK;
 458                 if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X)
 459                         wps->auth_types |= WPS_AUTH_WPA;
 460
 461                 if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
 462                         wps->encr_types |= WPS_ENCR_AES;
 463                 if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
 464                         wps->encr_types |= WPS_ENCR_TKIP;
 465         }
 466
 467         if (conf->ssid.security_policy == SECURITY_PLAINTEXT) {
 468                 wps->encr_types |= WPS_ENCR_NONE;
 469                 wps->auth_types |= WPS_AUTH_OPEN;
 470         } else if (conf->ssid.security_policy == SECURITY_STATIC_WEP) {
 471                 wps->encr_types |= WPS_ENCR_WEP;
 472                 if (conf->auth_algs & WPA_AUTH_ALG_OPEN)
 473                         wps->auth_types |= WPS_AUTH_OPEN;
 474                 if (conf->auth_algs & WPA_AUTH_ALG_SHARED)
 475                         wps->auth_types |= WPS_AUTH_SHARED;
 476         } else if (conf->ssid.security_policy == SECURITY_IEEE_802_1X) {
 477                 wps->auth_types |= WPS_AUTH_OPEN;
 478                 if (conf->default_wep_key_len)
 479                         wps->encr_types |= WPS_ENCR_WEP;
 480                 else
 481                         wps->encr_types |= WPS_ENCR_NONE;
 482         }
 483
 484         if (conf->ssid.wpa_psk_file) {
 485                 /* Use per-device PSKs */
 486         } else if (conf->ssid.wpa_passphrase) {
 487                 wps->network_key = (u8 *) os_strdup(conf->ssid.wpa_passphrase);
 488                 wps->network_key_len = os_strlen(conf->ssid.wpa_passphrase);
 489         } else if (conf->ssid.wpa_psk) {
 490                 wps->network_key = os_malloc(2 * PMK_LEN + 1);
 491                 if (wps->network_key == NULL) {
 492                         os_free(wps);
 493                         return -1;
 494                 }
 495                 wpa_snprintf_hex((char *) wps->network_key, 2 * PMK_LEN + 1,
 496                                  conf->ssid.wpa_psk->psk, PMK_LEN);
 497                 wps->network_key_len = 2 * PMK_LEN;
 498         } else if (conf->ssid.wep.keys_set && conf->ssid.wep.key[0]) {
 499                 wps->network_key = os_malloc(conf->ssid.wep.len[0]);
 500                 if (wps->network_key == NULL) {
 501                         os_free(wps);
 502                         return -1;
 503                 }
 504                 os_memcpy(wps->network_key, conf->ssid.wep.key[0],
 505                           conf->ssid.wep.len[0]);
 506                 wps->network_key_len = conf->ssid.wep.len[0];
 507         }
 508
 509         if (conf->wps_state == WPS_STATE_NOT_CONFIGURED) {
 510                 /* Override parameters to enable security by default */
 511                 wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
 512                 wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
 513         }
 514
 515         cfg.new_psk_cb = hostapd_wps_new_psk_cb;
 516         cfg.set_ie_cb = hostapd_wps_set_ie_cb;
 517         cfg.pin_needed_cb = hostapd_wps_pin_needed_cb;
 518         cfg.cb_ctx = hapd;
 519
 520         wps->registrar = wps_registrar_init(wps, &cfg);
 521         if (wps->registrar == NULL) {
 522                 printf("Failed to initialize WPS Registrar\n");
 523                 os_free(wps->network_key);
 524                 os_free(wps);
 525                 return -1;
 526         }
 527
 528         hapd->wps = wps;
 529
 530         return 0;
 531 }
 532
 533
 534 void hostapd_deinit_wps(struct hostapd_data *hapd)
 535 {
 536         if (hapd->wps == NULL)
 537                 return;
 538         wps_registrar_deinit(hapd->wps->registrar);
 539         os_free(hapd->wps->network_key);
 540         wps_device_data_free(&hapd->wps->dev);
 541         os_free(hapd->wps);
 542         hapd->wps = NULL;
 543         hostapd_wps_clear_ies(hapd);
 544 }
 545
 546
 547 int hostapd_wps_add_pin(struct hostapd_data *hapd, const char *uuid,
 548                         const char *pin)
 549 {
 550         u8 u[UUID_LEN];
 551         int any = 0;
 552
 553         if (hapd->wps == NULL)
 554                 return -1;
 555         if (os_strcmp(uuid, "any") == 0)
 556                 any = 1;
 557         else if (uuid_str2bin(uuid, u))
 558                 return -1;
 559         return wps_registrar_add_pin(hapd->wps->registrar, any ? NULL : u,
 560                                      (const u8 *) pin, os_strlen(pin));
 561 }
 562
 563
 564 int hostapd_wps_button_pushed(struct hostapd_data *hapd)
 565 {
 566         if (hapd->wps == NULL)
 567                 return -1;
 568         return wps_registrar_button_pushed(hapd->wps->registrar);
 569 }
 570
 571
 572 void hostapd_wps_probe_req_rx(struct hostapd_data *hapd, const u8 *addr,
 573                               const u8 *ie, size_t ie_len)
 574 {
 575         struct wpabuf *wps_ie;
 576         const u8 *end, *pos, *wps;
 577
 578         if (hapd->wps == NULL)
 579                 return;
 580
 581         pos = ie;
 582         end = ie + ie_len;
 583         wps = NULL;
 584
 585         while (pos + 1 < end) {
 586                 if (pos + 2 + pos[1] > end)
 587                         return;
 588                 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
 589                     WPA_GET_BE32(&pos[2]) == WPS_DEV_OUI_WFA) {
 590                         wps = pos;
 591                         break;
 592                 }
 593                 pos += 2 + pos[1];
 594         }
 595
 596         if (wps == NULL)
 597                 return; /* No WPS IE in Probe Request */
 598
 599         wps_ie = wpabuf_alloc(ie_len);
 600         if (wps_ie == NULL)
 601                 return;
 602
 603         /* There may be multiple WPS IEs in the message, so need to concatenate
 604          * their WPS Data fields */
 605         while (pos + 1 < end) {
 606                 if (pos + 2 + pos[1] > end)
 607                         break;
 608                 if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && pos[1] >= 4 &&
 609                     WPA_GET_BE32(&pos[2]) == WPS_DEV_OUI_WFA)
 610                         wpabuf_put_data(wps_ie, pos + 6, pos[1] - 4);
 611                 pos += 2 + pos[1];
 612         }
 613
 614         if (wpabuf_len(wps_ie) > 0)
 615                 wps_registrar_probe_req_rx(hapd->wps->registrar, addr, wps_ie);
 616
 617         wpabuf_free(wps_ie);
 618 }