text: /*
   * hostapd / WPS integration
   * Copyright (c) 2008-2012, Jouni Malinen <j@w1.fi>
   *
   * This software may be distributed under the terms of the BSD license.
   * See README for more details.
   */
  
  #include "utils/includes.h"
  
  #include "utils/common.h"
  #include "utils/eloop.h"
  #include "utils/uuid.h"
  #include "common/wpa_ctrl.h"
  #include "common/ieee802_11_defs.h"
  #include "common/ieee802_11_common.h"
  #include "eapol_auth/eapol_auth_sm.h"
  #include "eapol_auth/eapol_auth_sm_i.h"
  #include "wps/wps.h"
  #include "wps/wps_defs.h"
  #include "wps/wps_dev_attr.h"
  #include "wps/wps_attr_parse.h"
  #include "hostapd.h"
  #include "ap_config.h"
  #include "ap_drv_ops.h"
  #include "beacon.h"
  #include "sta_info.h"
  #include "wps_hostapd.h"
  
  
  #ifdef CONFIG_WPS_UPNP
  #include "wps/wps_upnp.h"
  static int hostapd_wps_upnp_init(struct hostapd_data *hapd,
  				 struct wps_context *wps);
  static void hostapd_wps_upnp_deinit(struct hostapd_data *hapd);
  #endif /* CONFIG_WPS_UPNP */
  
  static int hostapd_wps_probe_req_rx(void *ctx, const u8 *addr, const u8 *da,
  				    const u8 *bssid,
  				    const u8 *ie, size_t ie_len,
  				    int ssi_signal);
  static void hostapd_wps_ap_pin_timeout(void *eloop_data, void *user_ctx);
  static void hostapd_wps_nfc_clear(struct wps_context *wps);
  
  
  struct wps_for_each_data {
  	int (*func)(struct hostapd_data *h, void *ctx);
  	void *ctx;
  	struct hostapd_data *calling_hapd;
  };
  
  
  static int wps_for_each(struct hostapd_iface *iface, void *ctx)
  {
  	struct wps_for_each_data *data = ctx;
  	size_t j;
  
  	if (iface == NULL)
  		return 0;
  	for (j = 0; j < iface->num_bss; j++) {
  		struct hostapd_data *hapd = iface->bss[j];
  		int ret;
  
  		if (hapd != data->calling_hapd &&
  		    (hapd->conf->wps_independent ||
  		     data->calling_hapd->conf->wps_independent))
  			continue;
  
  		ret = data->func(hapd, data->ctx);
  		if (ret)
  			return ret;
  	}
  
  	return 0;
  }
  
  
  static int hostapd_wps_for_each(struct hostapd_data *hapd,
  				int (*func)(struct hostapd_data *h, void *ctx),
  				void *ctx)
  {
  	struct hostapd_iface *iface = hapd->iface;
  	struct wps_for_each_data data;
  	data.func = func;
  	data.ctx = ctx;
  	data.calling_hapd = hapd;
  	if (iface->interfaces == NULL ||
  	    iface->interfaces->for_each_interface == NULL)
  		return wps_for_each(iface, &data);
  	return iface->interfaces->for_each_interface(iface->interfaces,
  						     wps_for_each, &data);
  }
  
  
  static int hostapd_wps_new_psk_cb(void *ctx, const u8 *mac_addr,
  				  const u8 *p2p_dev_addr, const u8 *psk,
  				  size_t psk_len)
  {
  	struct hostapd_data *hapd = ctx;
  	struct hostapd_wpa_psk *p;
  	struct hostapd_ssid *ssid = &hapd->conf->ssid;
  
  	if (is_zero_ether_addr(p2p_dev_addr)) {
  		wpa_printf(MSG_DEBUG,
  			   "Received new WPA/WPA2-PSK from WPS for STA " MACSTR,
  			   MAC2STR(mac_addr));
  	} else {
  		wpa_printf(MSG_DEBUG,
  			   "Received new WPA/WPA2-PSK from WPS for STA " MACSTR
  			   " P2P Device Addr " MACSTR,
  			   MAC2STR(mac_addr), MAC2STR(p2p_dev_addr));
  	}
  	wpa_hexdump_key(MSG_DEBUG, "Per-device PSK", psk, psk_len);
  
  	if (psk_len != PMK_LEN) {
  		wpa_printf(MSG_DEBUG, "Unexpected PSK length %lu",
  			   (unsigned long) psk_len);
  		return -1;
  	}
  
  	/* Add the new PSK to runtime PSK list */
  	p = os_zalloc(sizeof(*p));
  	if (p == NULL)
  		return -1;
  	os_memcpy(p->addr, mac_addr, ETH_ALEN);
  	os_memcpy(p->p2p_dev_addr, p2p_dev_addr, ETH_ALEN);
  	os_memcpy(p->psk, psk, PMK_LEN);
  
  	if (hapd->new_psk_cb) {
  		hapd->new_psk_cb(hapd->new_psk_cb_ctx, mac_addr, p2p_dev_addr,
  				 psk, psk_len);
  	}
  
  	p->next = ssid->wpa_psk;
  	ssid->wpa_psk = p;
  
  	if (ssid->wpa_psk_file) {
  		FILE *f;
  		char hex[PMK_LEN * 2 + 1];
  		/* Add the new PSK to PSK list file */
  		f = fopen(ssid->wpa_psk_file, "a");
  		if (f == NULL) {
  			wpa_printf(MSG_DEBUG, "Failed to add the PSK to "
  				   "'%s'", ssid->wpa_psk_file);
  			return -1;
  		}
  
  		wpa_snprintf_hex(hex, sizeof(hex), psk, psk_len);
  		fprintf(f, MACSTR " %s\n", MAC2STR(mac_addr), hex);
  		fclose(f);
  	}
  
  	return 0;
  }
  
  
  static int hostapd_wps_set_ie_cb(void *ctx, struct wpabuf *beacon_ie,
  				 struct wpabuf *probe_resp_ie)
  {
  	struct hostapd_data *hapd = ctx;
  	wpabuf_free(hapd->wps_beacon_ie);
  	hapd->wps_beacon_ie = beacon_ie;
  	wpabuf_free(hapd->wps_probe_resp_ie);
  	hapd->wps_probe_resp_ie = probe_resp_ie;
  	if (hapd->beacon_set_done)
  		ieee802_11_set_beacon(hapd);
  	return hostapd_set_ap_wps_ie(hapd);
  }
  
  
  static void hostapd_wps_pin_needed_cb(void *ctx, const u8 *uuid_e,
  				      const struct wps_device_data *dev)
  {
  	struct hostapd_data *hapd = ctx;
  	char uuid[40], txt[400];
  	int len;
  	char devtype[WPS_DEV_TYPE_BUFSIZE];
  	if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
  		return;
  	wpa_printf(MSG_DEBUG, "WPS: PIN needed for E-UUID %s", uuid);
  	len = os_snprintf(txt, sizeof(txt), WPS_EVENT_PIN_NEEDED
  			  "%s " MACSTR " [%s|%s|%s|%s|%s|%s]",
  			  uuid, MAC2STR(dev->mac_addr), dev->device_name,
  			  dev->manufacturer, dev->model_name,
  			  dev->model_number, dev->serial_number,
  			  wps_dev_type_bin2str(dev->pri_dev_type, devtype,
  					       sizeof(devtype)));
  	if (!os_snprintf_error(sizeof(txt), len))
  		wpa_msg(hapd->msg_ctx, MSG_INFO, "%s", txt);
  
  	if (hapd->conf->wps_pin_requests) {
  		FILE *f;
  		struct os_time t;
  		f = fopen(hapd->conf->wps_pin_requests, "a");
  		if (f == NULL)
  			return;
  		os_get_time(&t);
  		fprintf(f, "%ld\t%s\t" MACSTR "\t%s\t%s\t%s\t%s\t%s"
  			"\t%s\n",
  			t.sec, uuid, MAC2STR(dev->mac_addr), dev->device_name,
  			dev->manufacturer, dev->model_name, dev->model_number,
  			dev->serial_number,
  			wps_dev_type_bin2str(dev->pri_dev_type, devtype,
  					     sizeof(devtype)));
  		fclose(f);
  	}
  }
  
  
  struct wps_stop_reg_data {
  	struct hostapd_data *current_hapd;
  	const u8 *uuid_e;
  	const u8 *dev_pw;
  	size_t dev_pw_len;
  };
  
  static int wps_stop_registrar(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_stop_reg_data *data = ctx;
  	if (hapd != data->current_hapd && hapd->wps != NULL)
  		wps_registrar_complete(hapd->wps->registrar, data->uuid_e,
  				       data->dev_pw, data->dev_pw_len);
  	return 0;
  }
  
  
  static void hostapd_wps_reg_success_cb(void *ctx, const u8 *mac_addr,
  				       const u8 *uuid_e, const u8 *dev_pw,
  				       size_t dev_pw_len)
  {
  	struct hostapd_data *hapd = ctx;
  	char uuid[40];
  	struct wps_stop_reg_data data;
  	if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
  		return;
  	wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_REG_SUCCESS MACSTR " %s",
  		MAC2STR(mac_addr), uuid);
  	if (hapd->wps_reg_success_cb)
  		hapd->wps_reg_success_cb(hapd->wps_reg_success_cb_ctx,
  					 mac_addr, uuid_e);
  	data.current_hapd = hapd;
  	data.uuid_e = uuid_e;
  	data.dev_pw = dev_pw;
  	data.dev_pw_len = dev_pw_len;
  	hostapd_wps_for_each(hapd, wps_stop_registrar, &data);
  }
  
  
  static void hostapd_wps_enrollee_seen_cb(void *ctx, const u8 *addr,
  					 const u8 *uuid_e,
  					 const u8 *pri_dev_type,
  					 u16 config_methods,
  					 u16 dev_password_id, u8 request_type,
  					 const char *dev_name)
  {
  	struct hostapd_data *hapd = ctx;
  	char uuid[40];
  	char devtype[WPS_DEV_TYPE_BUFSIZE];
  	if (uuid_bin2str(uuid_e, uuid, sizeof(uuid)))
  		return;
  	if (dev_name == NULL)
  		dev_name = "";
  	wpa_msg_ctrl(hapd->msg_ctx, MSG_INFO, WPS_EVENT_ENROLLEE_SEEN MACSTR
  		     " %s %s 0x%x %u %u [%s]",
  		     MAC2STR(addr), uuid,
  		     wps_dev_type_bin2str(pri_dev_type, devtype,
  					  sizeof(devtype)),
  		     config_methods, dev_password_id, request_type, dev_name);
  }
  
  
  static int str_starts(const char *str, const char *start)
  {
  	return os_strncmp(str, start, os_strlen(start)) == 0;
  }
  
  
  static void wps_reload_config(void *eloop_data, void *user_ctx)
  {
  	struct hostapd_iface *iface = eloop_data;
  
  	wpa_printf(MSG_DEBUG, "WPS: Reload configuration data");
  	if (iface->interfaces == NULL ||
  	    iface->interfaces->reload_config(iface) < 0) {
  		wpa_printf(MSG_WARNING, "WPS: Failed to reload the updated "
  			   "configuration");
  	}
  }
  
  
  void hostapd_wps_eap_completed(struct hostapd_data *hapd)
  {
  	/*
  	 * Reduce race condition of the station trying to reconnect immediately
  	 * after AP reconfiguration through WPS by rescheduling the reload
  	 * timeout to happen after EAP completion rather than the originally
  	 * scheduled 100 ms after new configuration became known.
  	 */
  	if (eloop_deplete_timeout(0, 0, wps_reload_config, hapd->iface, NULL) ==
  	    1)
  		wpa_printf(MSG_DEBUG, "WPS: Reschedule immediate configuration reload");
  }
  
  
  static void hapd_new_ap_event(struct hostapd_data *hapd, const u8 *attr,
  			      size_t attr_len)
  {
  	size_t blen = attr_len * 2 + 1;
  	char *buf = os_malloc(blen);
  	if (buf) {
  		wpa_snprintf_hex(buf, blen, attr, attr_len);
  		wpa_msg(hapd->msg_ctx, MSG_INFO,
  			WPS_EVENT_NEW_AP_SETTINGS "%s", buf);
  		os_free(buf);
  	}
  }
  
  
  static int hapd_wps_reconfig_in_memory(struct hostapd_data *hapd,
  				       const struct wps_credential *cred)
  {
  	struct hostapd_bss_config *bss = hapd->conf;
  
  	wpa_printf(MSG_DEBUG, "WPS: Updating in-memory configuration");
  
  	bss->wps_state = 2;
  	if (cred->ssid_len <= SSID_MAX_LEN) {
  		os_memcpy(bss->ssid.ssid, cred->ssid, cred->ssid_len);
  		bss->ssid.ssid_len = cred->ssid_len;
  		bss->ssid.ssid_set = 1;
  	}
  
  	if ((cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK)) &&
  	    (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK)))
  		bss->wpa = 3;
  	else if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK))
  		bss->wpa = 2;
  	else if (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK))
  		bss->wpa = 1;
  	else
  		bss->wpa = 0;
  
  	if (bss->wpa) {
  		if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA))
  			bss->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X;
  		if (cred->auth_type & (WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK))
  			bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
  
  		bss->wpa_pairwise = 0;
  		if (cred->encr_type & WPS_ENCR_AES) {
  			if (hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
  				bss->wpa_pairwise |= WPA_CIPHER_GCMP;
  			else
  				bss->wpa_pairwise |= WPA_CIPHER_CCMP;
  		}
  		if (cred->encr_type & WPS_ENCR_TKIP)
  			bss->wpa_pairwise |= WPA_CIPHER_TKIP;
  		bss->rsn_pairwise = bss->wpa_pairwise;
  		bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa,
  							    bss->wpa_pairwise,
  							    bss->rsn_pairwise);
  
  		if (cred->key_len >= 8 && cred->key_len < 64) {
  			os_free(bss->ssid.wpa_passphrase);
  			bss->ssid.wpa_passphrase = os_zalloc(cred->key_len + 1);
  			if (bss->ssid.wpa_passphrase)
  				os_memcpy(bss->ssid.wpa_passphrase, cred->key,
  					  cred->key_len);
  			hostapd_config_clear_wpa_psk(&bss->ssid.wpa_psk);
  		} else if (cred->key_len == 64) {
  			hostapd_config_clear_wpa_psk(&bss->ssid.wpa_psk);
  			bss->ssid.wpa_psk =
  				os_zalloc(sizeof(struct hostapd_wpa_psk));
  			if (bss->ssid.wpa_psk &&
  			    hexstr2bin((const char *) cred->key,
  				       bss->ssid.wpa_psk->psk, PMK_LEN) == 0) {
  				bss->ssid.wpa_psk->group = 1;
  				os_free(bss->ssid.wpa_passphrase);
  				bss->ssid.wpa_passphrase = NULL;
  			}
  		}
  		bss->auth_algs = 1;
  	} else {
  		/*
  		 * WPS 2.0 does not allow WEP to be configured, so no need to
  		 * process that option here either.
  		 */
  		bss->auth_algs = 1;
  	}
  
  	/* Schedule configuration reload after short period of time to allow
  	 * EAP-WSC to be finished.
  	 */
  	eloop_register_timeout(0, 100000, wps_reload_config, hapd->iface,
  			       NULL);
  
  	return 0;
  }
  
  
  static int hapd_wps_cred_cb(struct hostapd_data *hapd, void *ctx)
  {
  	const struct wps_credential *cred = ctx;
  	FILE *oconf, *nconf;
  	size_t len, i;
  	char *tmp_fname;
  	char buf[1024];
  	int multi_bss;
  	int wpa;
  
  	if (hapd->wps == NULL)
  		return 0;
  
  	wpa_hexdump_key(MSG_DEBUG, "WPS: Received Credential attribute",
  			cred->cred_attr, cred->cred_attr_len);
  
  	wpa_printf(MSG_DEBUG, "WPS: Received new AP Settings");
  	wpa_hexdump_ascii(MSG_DEBUG, "WPS: SSID", cred->ssid, cred->ssid_len);
  	wpa_printf(MSG_DEBUG, "WPS: Authentication Type 0x%x",
  		   cred->auth_type);
  	wpa_printf(MSG_DEBUG, "WPS: Encryption Type 0x%x", cred->encr_type);
  	wpa_printf(MSG_DEBUG, "WPS: Network Key Index %d", cred->key_idx);
  	wpa_hexdump_key(MSG_DEBUG, "WPS: Network Key",
  			cred->key, cred->key_len);
  	wpa_printf(MSG_DEBUG, "WPS: MAC Address " MACSTR,
  		   MAC2STR(cred->mac_addr));
  
  	if ((hapd->conf->wps_cred_processing == 1 ||
  	     hapd->conf->wps_cred_processing == 2) && cred->cred_attr) {
  		hapd_new_ap_event(hapd, cred->cred_attr, cred->cred_attr_len);
  	} else if (hapd->conf->wps_cred_processing == 1 ||
  		   hapd->conf->wps_cred_processing == 2) {
  		struct wpabuf *attr;
  		attr = wpabuf_alloc(200);
  		if (attr && wps_build_credential_wrap(attr, cred) == 0)
  			hapd_new_ap_event(hapd, wpabuf_head_u8(attr),
  					  wpabuf_len(attr));
  		wpabuf_free(attr);
  	} else
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_NEW_AP_SETTINGS);
  
  	if (hapd->conf->wps_cred_processing == 1)
  		return 0;
  
  	os_memcpy(hapd->wps->ssid, cred->ssid, cred->ssid_len);
  	hapd->wps->ssid_len = cred->ssid_len;
  	hapd->wps->encr_types = cred->encr_type;
  	hapd->wps->auth_types = cred->auth_type;
  	hapd->wps->ap_encr_type = cred->encr_type;
  	hapd->wps->ap_auth_type = cred->auth_type;
  	if (cred->key_len == 0) {
  		os_free(hapd->wps->network_key);
  		hapd->wps->network_key = NULL;
  		hapd->wps->network_key_len = 0;
  	} else if ((cred->auth_type & (WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK)) &&
  		   (cred->key_len < 8 || cred->key_len > 2 * PMK_LEN)) {
  		wpa_printf(MSG_INFO, "WPS: Invalid key length %lu for WPA/WPA2",
  			   (unsigned long) cred->key_len);
  		return -1;
  	} else {
  		if (hapd->wps->network_key == NULL ||
  		    hapd->wps->network_key_len < cred->key_len) {
  			hapd->wps->network_key_len = 0;
  			os_free(hapd->wps->network_key);
  			hapd->wps->network_key = os_malloc(cred->key_len);
  			if (hapd->wps->network_key == NULL)
  				return -1;
  		}
  		hapd->wps->network_key_len = cred->key_len;
  		os_memcpy(hapd->wps->network_key, cred->key, cred->key_len);
  	}
  	hapd->wps->wps_state = WPS_STATE_CONFIGURED;
  
  	if (hapd->iface->config_fname == NULL)
  		return hapd_wps_reconfig_in_memory(hapd, cred);
  	len = os_strlen(hapd->iface->config_fname) + 5;
  	tmp_fname = os_malloc(len);
  	if (tmp_fname == NULL)
  		return -1;
  	os_snprintf(tmp_fname, len, "%s-new", hapd->iface->config_fname);
  
  	oconf = fopen(hapd->iface->config_fname, "r");
  	if (oconf == NULL) {
  		wpa_printf(MSG_WARNING, "WPS: Could not open current "
  			   "configuration file");
  		os_free(tmp_fname);
  		return -1;
  	}
  
  	nconf = fopen(tmp_fname, "w");
  	if (nconf == NULL) {
  		wpa_printf(MSG_WARNING, "WPS: Could not write updated "
  			   "configuration file");
  		os_free(tmp_fname);
  		fclose(oconf);
  		return -1;
  	}
  
  	fprintf(nconf, "# WPS configuration - START\n");
  
  	fprintf(nconf, "wps_state=2\n");
  
  	if (is_hex(cred->ssid, cred->ssid_len)) {
  		fprintf(nconf, "ssid2=");
  		for (i = 0; i < cred->ssid_len; i++)
  			fprintf(nconf, "%02x", cred->ssid[i]);
  		fprintf(nconf, "\n");
  	} else {
  		fprintf(nconf, "ssid=");
  		for (i = 0; i < cred->ssid_len; i++)
  			fputc(cred->ssid[i], nconf);
  		fprintf(nconf, "\n");
  	}
  
  	if ((cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK)) &&
  	    (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK)))
  		wpa = 3;
  	else if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA2PSK))
  		wpa = 2;
  	else if (cred->auth_type & (WPS_AUTH_WPA | WPS_AUTH_WPAPSK))
  		wpa = 1;
  	else
  		wpa = 0;
  
  	if (wpa) {
  		char *prefix;
  		fprintf(nconf, "wpa=%d\n", wpa);
  
  		fprintf(nconf, "wpa_key_mgmt=");
  		prefix = "";
  		if (cred->auth_type & (WPS_AUTH_WPA2 | WPS_AUTH_WPA)) {
  			fprintf(nconf, "WPA-EAP");
  			prefix = " ";
  		}
  		if (cred->auth_type & (WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK))
  			fprintf(nconf, "%sWPA-PSK", prefix);
  		fprintf(nconf, "\n");
  
  		fprintf(nconf, "wpa_pairwise=");
  		prefix = "";
  		if (cred->encr_type & WPS_ENCR_AES) {
  			if (hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD)
  				fprintf(nconf, "GCMP");
  			else
  				fprintf(nconf, "CCMP");
  
  			prefix = " ";
  		}
  		if (cred->encr_type & WPS_ENCR_TKIP) {
  			fprintf(nconf, "%sTKIP", prefix);
  		}
  		fprintf(nconf, "\n");
  
  		if (cred->key_len >= 8 && cred->key_len < 64) {
  			fprintf(nconf, "wpa_passphrase=");
  			for (i = 0; i < cred->key_len; i++)
  				fputc(cred->key[i], nconf);
  			fprintf(nconf, "\n");
  		} else if (cred->key_len == 64) {
  			fprintf(nconf, "wpa_psk=");
  			for (i = 0; i < cred->key_len; i++)
  				fputc(cred->key[i], nconf);
  			fprintf(nconf, "\n");
  		} else {
  			wpa_printf(MSG_WARNING, "WPS: Invalid key length %lu "
  				   "for WPA/WPA2",
  				   (unsigned long) cred->key_len);
  		}
  
  		fprintf(nconf, "auth_algs=1\n");
  	} else {
  		/*
  		 * WPS 2.0 does not allow WEP to be configured, so no need to
  		 * process that option here either.
  		 */
  		fprintf(nconf, "auth_algs=1\n");
  	}
  
  	fprintf(nconf, "# WPS configuration - END\n");
  
  	multi_bss = 0;
  	while (fgets(buf, sizeof(buf), oconf)) {
  		if (os_strncmp(buf, "bss=", 4) == 0)
  			multi_bss = 1;
  		if (!multi_bss &&
  		    (str_starts(buf, "ssid=") ||
  		     str_starts(buf, "ssid2=") ||
  		     str_starts(buf, "auth_algs=") ||
  		     str_starts(buf, "wep_default_key=") ||
  		     str_starts(buf, "wep_key") ||
  		     str_starts(buf, "wps_state=") ||
  		     str_starts(buf, "wpa=") ||
  		     str_starts(buf, "wpa_psk=") ||
  		     str_starts(buf, "wpa_pairwise=") ||
  		     str_starts(buf, "rsn_pairwise=") ||
  		     str_starts(buf, "wpa_key_mgmt=") ||
  		     str_starts(buf, "wpa_passphrase="))) {
  			fprintf(nconf, "#WPS# %s", buf);
  		} else
  			fprintf(nconf, "%s", buf);
  	}
  
  	fclose(nconf);
  	fclose(oconf);
  
  	if (rename(tmp_fname, hapd->iface->config_fname) < 0) {
  		wpa_printf(MSG_WARNING, "WPS: Failed to rename the updated "
  			   "configuration file: %s", strerror(errno));
  		os_free(tmp_fname);
  		return -1;
  	}
  
  	os_free(tmp_fname);
  
  	/* Schedule configuration reload after short period of time to allow
  	 * EAP-WSC to be finished.
  	 */
  	eloop_register_timeout(0, 100000, wps_reload_config, hapd->iface,
  			       NULL);
  
  	wpa_printf(MSG_DEBUG, "WPS: AP configuration updated");
  
  	return 0;
  }
  
  
  static int hostapd_wps_cred_cb(void *ctx, const struct wps_credential *cred)
  {
  	struct hostapd_data *hapd = ctx;
  	return hostapd_wps_for_each(hapd, hapd_wps_cred_cb, (void *) cred);
  }
  
  
  static void hostapd_wps_reenable_ap_pin(void *eloop_data, void *user_ctx)
  {
  	struct hostapd_data *hapd = eloop_data;
  
  	if (hapd->conf->ap_setup_locked)
  		return;
  	if (hapd->ap_pin_failures_consecutive >= 10)
  		return;
  
  	wpa_printf(MSG_DEBUG, "WPS: Re-enable AP PIN");
  	wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_SETUP_UNLOCKED);
  	hapd->wps->ap_setup_locked = 0;
  	wps_registrar_update_ie(hapd->wps->registrar);
  }
  
  
  static int wps_pwd_auth_fail(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_event_pwd_auth_fail *data = ctx;
  
  	if (!data->enrollee || hapd->conf->ap_pin == NULL || hapd->wps == NULL)
  		return 0;
  
  	/*
  	 * Registrar failed to prove its knowledge of the AP PIN. Lock AP setup
  	 * for some time if this happens multiple times to slow down brute
  	 * force attacks.
  	 */
  	hapd->ap_pin_failures++;
  	hapd->ap_pin_failures_consecutive++;
  	wpa_printf(MSG_DEBUG, "WPS: AP PIN authentication failure number %u "
  		   "(%u consecutive)",
  		   hapd->ap_pin_failures, hapd->ap_pin_failures_consecutive);
  	if (hapd->ap_pin_failures < 3)
  		return 0;
  
  	wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_SETUP_LOCKED);
  	hapd->wps->ap_setup_locked = 1;
  
  	wps_registrar_update_ie(hapd->wps->registrar);
  
  	if (!hapd->conf->ap_setup_locked &&
  	    hapd->ap_pin_failures_consecutive >= 10) {
  		/*
  		 * In indefinite lockdown - disable automatic AP PIN
  		 * reenablement.
  		 */
  		eloop_cancel_timeout(hostapd_wps_reenable_ap_pin, hapd, NULL);
  		wpa_printf(MSG_DEBUG, "WPS: AP PIN disabled indefinitely");
  	} else if (!hapd->conf->ap_setup_locked) {
  		if (hapd->ap_pin_lockout_time == 0)
  			hapd->ap_pin_lockout_time = 60;
  		else if (hapd->ap_pin_lockout_time < 365 * 24 * 60 * 60 &&
  			 (hapd->ap_pin_failures % 3) == 0)
  			hapd->ap_pin_lockout_time *= 2;
  
  		wpa_printf(MSG_DEBUG, "WPS: Disable AP PIN for %u seconds",
  			   hapd->ap_pin_lockout_time);
  		eloop_cancel_timeout(hostapd_wps_reenable_ap_pin, hapd, NULL);
  		eloop_register_timeout(hapd->ap_pin_lockout_time, 0,
  				       hostapd_wps_reenable_ap_pin, hapd,
  				       NULL);
  	}
  
  	return 0;
  }
  
  
  static void hostapd_pwd_auth_fail(struct hostapd_data *hapd,
  				  struct wps_event_pwd_auth_fail *data)
  {
  	/* Update WPS Status - Authentication Failure */
  	wpa_printf(MSG_DEBUG, "WPS: Authentication failure update");
  	hapd->wps_stats.status = WPS_STATUS_FAILURE;
  	hapd->wps_stats.failure_reason = WPS_EI_AUTH_FAILURE;
  	os_memcpy(hapd->wps_stats.peer_addr, data->peer_macaddr, ETH_ALEN);
  
  	hostapd_wps_for_each(hapd, wps_pwd_auth_fail, data);
  }
  
  
  static int wps_ap_pin_success(struct hostapd_data *hapd, void *ctx)
  {
  	if (hapd->conf->ap_pin == NULL || hapd->wps == NULL)
  		return 0;
  
  	if (hapd->ap_pin_failures_consecutive == 0)
  		return 0;
  
  	wpa_printf(MSG_DEBUG, "WPS: Clear consecutive AP PIN failure counter "
  		   "- total validation failures %u (%u consecutive)",
  		   hapd->ap_pin_failures, hapd->ap_pin_failures_consecutive);
  	hapd->ap_pin_failures_consecutive = 0;
  
  	return 0;
  }
  
  
  static void hostapd_wps_ap_pin_success(struct hostapd_data *hapd)
  {
  	hostapd_wps_for_each(hapd, wps_ap_pin_success, NULL);
  }
  
  
  static void hostapd_wps_event_pbc_overlap(struct hostapd_data *hapd)
  {
  	/* Update WPS Status - PBC Overlap */
  	hapd->wps_stats.pbc_status = WPS_PBC_STATUS_OVERLAP;
  }
  
  
  static void hostapd_wps_event_pbc_timeout(struct hostapd_data *hapd)
  {
  	/* Update WPS PBC Status:PBC Timeout */
  	hapd->wps_stats.pbc_status = WPS_PBC_STATUS_TIMEOUT;
  }
  
  
  static void hostapd_wps_event_pbc_active(struct hostapd_data *hapd)
  {
  	/* Update WPS PBC status - Active */
  	hapd->wps_stats.pbc_status = WPS_PBC_STATUS_ACTIVE;
  }
  
  
  static void hostapd_wps_event_pbc_disable(struct hostapd_data *hapd)
  {
  	/* Update WPS PBC status - Active */
  	hapd->wps_stats.pbc_status = WPS_PBC_STATUS_DISABLE;
  }
  
  
  static void hostapd_wps_event_success(struct hostapd_data *hapd,
  				      struct wps_event_success *success)
  {
  	/* Update WPS status - Success */
  	hapd->wps_stats.pbc_status = WPS_PBC_STATUS_DISABLE;
  	hapd->wps_stats.status = WPS_STATUS_SUCCESS;
  	os_memcpy(hapd->wps_stats.peer_addr, success->peer_macaddr, ETH_ALEN);
  }
  
  
  static void hostapd_wps_event_fail(struct hostapd_data *hapd,
  				   struct wps_event_fail *fail)
  {
  	/* Update WPS status - Failure */
  	hapd->wps_stats.status = WPS_STATUS_FAILURE;
  	os_memcpy(hapd->wps_stats.peer_addr, fail->peer_macaddr, ETH_ALEN);
  
  	hapd->wps_stats.failure_reason = fail->error_indication;
  
  	if (fail->error_indication > 0 &&
  	    fail->error_indication < NUM_WPS_EI_VALUES) {
  		wpa_msg(hapd->msg_ctx, MSG_INFO,
  			WPS_EVENT_FAIL "msg=%d config_error=%d reason=%d (%s)",
  			fail->msg, fail->config_error, fail->error_indication,
  			wps_ei_str(fail->error_indication));
  	} else {
  		wpa_msg(hapd->msg_ctx, MSG_INFO,
  			WPS_EVENT_FAIL "msg=%d config_error=%d",
  			fail->msg, fail->config_error);
  	}
  }
  
  
  static void hostapd_wps_event_cb(void *ctx, enum wps_event event,
  				 union wps_event_data *data)
  {
  	struct hostapd_data *hapd = ctx;
  
  	switch (event) {
  	case WPS_EV_M2D:
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_M2D);
  		break;
  	case WPS_EV_FAIL:
  		hostapd_wps_event_fail(hapd, &data->fail);
  		break;
  	case WPS_EV_SUCCESS:
  		hostapd_wps_event_success(hapd, &data->success);
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_SUCCESS);
  		break;
  	case WPS_EV_PWD_AUTH_FAIL:
  		hostapd_pwd_auth_fail(hapd, &data->pwd_auth_fail);
  		break;
  	case WPS_EV_PBC_OVERLAP:
  		hostapd_wps_event_pbc_overlap(hapd);
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_OVERLAP);
  		break;
  	case WPS_EV_PBC_TIMEOUT:
  		hostapd_wps_event_pbc_timeout(hapd);
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_TIMEOUT);
  		break;
  	case WPS_EV_PBC_ACTIVE:
  		hostapd_wps_event_pbc_active(hapd);
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_ACTIVE);
  		break;
  	case WPS_EV_PBC_DISABLE:
  		hostapd_wps_event_pbc_disable(hapd);
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_DISABLE);
  		break;
  	case WPS_EV_ER_AP_ADD:
  		break;
  	case WPS_EV_ER_AP_REMOVE:
  		break;
  	case WPS_EV_ER_ENROLLEE_ADD:
  		break;
  	case WPS_EV_ER_ENROLLEE_REMOVE:
  		break;
  	case WPS_EV_ER_AP_SETTINGS:
  		break;
  	case WPS_EV_ER_SET_SELECTED_REGISTRAR:
  		break;
  	case WPS_EV_AP_PIN_SUCCESS:
  		hostapd_wps_ap_pin_success(hapd);
  		break;
  	}
  	if (hapd->wps_event_cb)
  		hapd->wps_event_cb(hapd->wps_event_cb_ctx, event, data);
  }
  
  
  static int hostapd_wps_rf_band_cb(void *ctx)
  {
  	struct hostapd_data *hapd = ctx;
  
  	return hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211A ?
  		WPS_RF_50GHZ :
  		hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD ?
  		WPS_RF_60GHZ : WPS_RF_24GHZ; /* FIX: dualband AP */
  }
  
  
  static void hostapd_wps_clear_ies(struct hostapd_data *hapd, int deinit_only)
  {
  	wpabuf_free(hapd->wps_beacon_ie);
  	hapd->wps_beacon_ie = NULL;
  
  	wpabuf_free(hapd->wps_probe_resp_ie);
  	hapd->wps_probe_resp_ie = NULL;
  
  	if (deinit_only) {
  		hostapd_reset_ap_wps_ie(hapd);
  		return;
  	}
  
  	hostapd_set_ap_wps_ie(hapd);
  }
  
  
  static int get_uuid_cb(struct hostapd_iface *iface, void *ctx)
  {
  	const u8 **uuid = ctx;
  	size_t j;
  
  	if (iface == NULL)
  		return 0;
  	for (j = 0; j < iface->num_bss; j++) {
  		struct hostapd_data *hapd = iface->bss[j];
  		if (hapd->wps && !hapd->conf->wps_independent &&
  		    !is_nil_uuid(hapd->wps->uuid)) {
  			*uuid = hapd->wps->uuid;
  			return 1;
  		}
  	}
  
  	return 0;
  }
  
  
  static const u8 * get_own_uuid(struct hostapd_iface *iface)
  {
  	const u8 *uuid;
  	if (iface->interfaces == NULL ||
  	    iface->interfaces->for_each_interface == NULL)
  		return NULL;
  	uuid = NULL;
  	iface->interfaces->for_each_interface(iface->interfaces, get_uuid_cb,
  					      &uuid);
  	return uuid;
  }
  
  
  static int count_interface_cb(struct hostapd_iface *iface, void *ctx)
  {
  	int *count= ctx;
  	(*count)++;
  	return 0;
  }
  
  
  static int interface_count(struct hostapd_iface *iface)
  {
  	int count = 0;
  	if (iface->interfaces == NULL ||
  	    iface->interfaces->for_each_interface == NULL)
  		return 0;
  	iface->interfaces->for_each_interface(iface->interfaces,
  					      count_interface_cb, &count);
  	return count;
  }
  
  
  static int hostapd_wps_set_vendor_ext(struct hostapd_data *hapd,
  				      struct wps_context *wps)
  {
  	int i;
  
  	for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++) {
  		wpabuf_free(wps->dev.vendor_ext[i]);
  		wps->dev.vendor_ext[i] = NULL;
  
  		if (hapd->conf->wps_vendor_ext[i] == NULL)
  			continue;
  
  		wps->dev.vendor_ext[i] =
  			wpabuf_dup(hapd->conf->wps_vendor_ext[i]);
  		if (wps->dev.vendor_ext[i] == NULL) {
  			while (--i >= 0)
  				wpabuf_free(wps->dev.vendor_ext[i]);
  			return -1;
  		}
  	}
  
  	return 0;
  }
  
  
  static void hostapd_free_wps(struct wps_context *wps)
  {
  	int i;
  
  	for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++)
  		wpabuf_free(wps->dev.vendor_ext[i]);
  	wps_device_data_free(&wps->dev);
  	os_free(wps->network_key);
  	hostapd_wps_nfc_clear(wps);
  	wpabuf_free(wps->dh_pubkey);
  	wpabuf_free(wps->dh_privkey);
  	os_free(wps);
  }
  
  
  int hostapd_init_wps(struct hostapd_data *hapd,
  		     struct hostapd_bss_config *conf)
  {
  	struct wps_context *wps;
  	struct wps_registrar_config cfg;
  
  	if (conf->wps_state == 0) {
  		hostapd_wps_clear_ies(hapd, 0);
  		return 0;
  	}
  
  	wps = os_zalloc(sizeof(*wps));
  	if (wps == NULL)
  		return -1;
  
  	wps->cred_cb = hostapd_wps_cred_cb;
  	wps->event_cb = hostapd_wps_event_cb;
  	wps->rf_band_cb = hostapd_wps_rf_band_cb;
  	wps->cb_ctx = hapd;
  
  	os_memset(&cfg, 0, sizeof(cfg));
  	wps->wps_state = hapd->conf->wps_state;
  	wps->ap_setup_locked = hapd->conf->ap_setup_locked;
  	if (is_nil_uuid(hapd->conf->uuid)) {
  		const u8 *uuid;
  		uuid = get_own_uuid(hapd->iface);
  		if (uuid && !conf->wps_independent) {
  			os_memcpy(wps->uuid, uuid, UUID_LEN);
  			wpa_hexdump(MSG_DEBUG, "WPS: Clone UUID from another "
  				    "interface", wps->uuid, UUID_LEN);
  		} else {
  			uuid_gen_mac_addr(hapd->own_addr, wps->uuid);
  			wpa_hexdump(MSG_DEBUG, "WPS: UUID based on MAC "
  				    "address", wps->uuid, UUID_LEN);
  		}
  	} else {
  		os_memcpy(wps->uuid, hapd->conf->uuid, UUID_LEN);
  		wpa_hexdump(MSG_DEBUG, "WPS: Use configured UUID",
  			    wps->uuid, UUID_LEN);
  	}
  	wps->ssid_len = hapd->conf->ssid.ssid_len;
  	os_memcpy(wps->ssid, hapd->conf->ssid.ssid, wps->ssid_len);
  	wps->ap = 1;
  	os_memcpy(wps->dev.mac_addr, hapd->own_addr, ETH_ALEN);
  	wps->dev.device_name = hapd->conf->device_name ?
  		os_strdup(hapd->conf->device_name) : NULL;
  	wps->dev.manufacturer = hapd->conf->manufacturer ?
  		os_strdup(hapd->conf->manufacturer) : NULL;
  	wps->dev.model_name = hapd->conf->model_name ?
  		os_strdup(hapd->conf->model_name) : NULL;
  	wps->dev.model_number = hapd->conf->model_number ?
  		os_strdup(hapd->conf->model_number) : NULL;
  	wps->dev.serial_number = hapd->conf->serial_number ?
  		os_strdup(hapd->conf->serial_number) : NULL;
  	wps->config_methods =
  		wps_config_methods_str2bin(hapd->conf->config_methods);
  	if ((wps->config_methods &
  	     (WPS_CONFIG_DISPLAY | WPS_CONFIG_VIRT_DISPLAY |
  	      WPS_CONFIG_PHY_DISPLAY)) == WPS_CONFIG_DISPLAY) {
  		wpa_printf(MSG_INFO, "WPS: Converting display to "
  			   "virtual_display for WPS 2.0 compliance");
  		wps->config_methods |= WPS_CONFIG_VIRT_DISPLAY;
  	}
  	if ((wps->config_methods &
  	     (WPS_CONFIG_PUSHBUTTON | WPS_CONFIG_VIRT_PUSHBUTTON |
  	      WPS_CONFIG_PHY_PUSHBUTTON)) == WPS_CONFIG_PUSHBUTTON) {
  		wpa_printf(MSG_INFO, "WPS: Converting push_button to "
  			   "virtual_push_button for WPS 2.0 compliance");
  		wps->config_methods |= WPS_CONFIG_VIRT_PUSHBUTTON;
  	}
  	os_memcpy(wps->dev.pri_dev_type, hapd->conf->device_type,
  		  WPS_DEV_TYPE_LEN);
  
  	if (hostapd_wps_set_vendor_ext(hapd, wps) < 0)
  		goto fail;
  
  	wps->dev.os_version = WPA_GET_BE32(hapd->conf->os_version);
  
  	if (conf->wps_rf_bands) {
  		wps->dev.rf_bands = conf->wps_rf_bands;
  	} else {
  		wps->dev.rf_bands =
  			hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211A ?
  			WPS_RF_50GHZ :
  			hapd->iconf->hw_mode == HOSTAPD_MODE_IEEE80211AD ?
  			WPS_RF_60GHZ : WPS_RF_24GHZ; /* FIX: dualband AP */
  	}
  
  	if (conf->wpa & WPA_PROTO_RSN) {
  		if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK)
  			wps->auth_types |= WPS_AUTH_WPA2PSK;
  		if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X)
  			wps->auth_types |= WPS_AUTH_WPA2;
  
  		if (conf->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP))
  			wps->encr_types |= WPS_ENCR_AES;
  		if (conf->rsn_pairwise & WPA_CIPHER_TKIP)
  			wps->encr_types |= WPS_ENCR_TKIP;
  	}
  
  	if (conf->wpa & WPA_PROTO_WPA) {
  		if (conf->wpa_key_mgmt & WPA_KEY_MGMT_PSK)
  			wps->auth_types |= WPS_AUTH_WPAPSK;
  		if (conf->wpa_key_mgmt & WPA_KEY_MGMT_IEEE8021X)
  			wps->auth_types |= WPS_AUTH_WPA;
  
  		if (conf->wpa_pairwise & WPA_CIPHER_CCMP)
  			wps->encr_types |= WPS_ENCR_AES;
  		if (conf->wpa_pairwise & WPA_CIPHER_TKIP)
  			wps->encr_types |= WPS_ENCR_TKIP;
  	}
  
  	if (conf->ssid.security_policy == SECURITY_PLAINTEXT) {
  		wps->encr_types |= WPS_ENCR_NONE;
  		wps->auth_types |= WPS_AUTH_OPEN;
  	}
  
  	if (conf->ssid.wpa_psk_file) {
  		/* Use per-device PSKs */
  	} else if (conf->ssid.wpa_passphrase) {
  		wps->network_key = (u8 *) os_strdup(conf->ssid.wpa_passphrase);
  		wps->network_key_len = os_strlen(conf->ssid.wpa_passphrase);
  	} else if (conf->ssid.wpa_psk) {
  		wps->network_key = os_malloc(2 * PMK_LEN + 1);
  		if (wps->network_key == NULL)
  			goto fail;
  		wpa_snprintf_hex((char *) wps->network_key, 2 * PMK_LEN + 1,
  				 conf->ssid.wpa_psk->psk, PMK_LEN);
  		wps->network_key_len = 2 * PMK_LEN;
  	} else if (conf->ssid.wep.keys_set && conf->ssid.wep.key[0]) {
  		wps->network_key = os_malloc(conf->ssid.wep.len[0]);
  		if (wps->network_key == NULL)
  			goto fail;
  		os_memcpy(wps->network_key, conf->ssid.wep.key[0],
  			  conf->ssid.wep.len[0]);
  		wps->network_key_len = conf->ssid.wep.len[0];
  	}
  
  	if (conf->ssid.wpa_psk) {
  		os_memcpy(wps->psk, conf->ssid.wpa_psk->psk, PMK_LEN);
  		wps->psk_set = 1;
  	}
  
  	wps->ap_auth_type = wps->auth_types;
  	wps->ap_encr_type = wps->encr_types;
  	if (conf->wps_state == WPS_STATE_NOT_CONFIGURED) {
  		/* Override parameters to enable security by default */
  		wps->auth_types = WPS_AUTH_WPA2PSK | WPS_AUTH_WPAPSK;
  		wps->encr_types = WPS_ENCR_AES | WPS_ENCR_TKIP;
  	}
  
  	wps->ap_settings = conf->ap_settings;
  	wps->ap_settings_len = conf->ap_settings_len;
  
  	cfg.new_psk_cb = hostapd_wps_new_psk_cb;
  	cfg.set_ie_cb = hostapd_wps_set_ie_cb;
  	cfg.pin_needed_cb = hostapd_wps_pin_needed_cb;
  	cfg.reg_success_cb = hostapd_wps_reg_success_cb;
  	cfg.enrollee_seen_cb = hostapd_wps_enrollee_seen_cb;
  	cfg.cb_ctx = hapd;
  	cfg.skip_cred_build = conf->skip_cred_build;
  	cfg.extra_cred = conf->extra_cred;
  	cfg.extra_cred_len = conf->extra_cred_len;
  	cfg.disable_auto_conf = (hapd->conf->wps_cred_processing == 1) &&
  		conf->skip_cred_build;
  	if (conf->ssid.security_policy == SECURITY_STATIC_WEP)
  		cfg.static_wep_only = 1;
  	cfg.dualband = interface_count(hapd->iface) > 1;
  	if ((wps->dev.rf_bands & (WPS_RF_50GHZ | WPS_RF_24GHZ)) ==
  	    (WPS_RF_50GHZ | WPS_RF_24GHZ))
  		cfg.dualband = 1;
  	if (cfg.dualband)
  		wpa_printf(MSG_DEBUG, "WPS: Dualband AP");
  	cfg.force_per_enrollee_psk = conf->force_per_enrollee_psk;
  
  	wps->registrar = wps_registrar_init(wps, &cfg);
  	if (wps->registrar == NULL) {
  		wpa_printf(MSG_ERROR, "Failed to initialize WPS Registrar");
  		goto fail;
  	}
  
  #ifdef CONFIG_WPS_UPNP
  	wps->friendly_name = hapd->conf->friendly_name;
  	wps->manufacturer_url = hapd->conf->manufacturer_url;
  	wps->model_description = hapd->conf->model_description;
  	wps->model_url = hapd->conf->model_url;
  	wps->upc = hapd->conf->upc;
  #endif /* CONFIG_WPS_UPNP */
  
  	hostapd_register_probereq_cb(hapd, hostapd_wps_probe_req_rx, hapd);
  
  	hapd->wps = wps;
  
  	return 0;
  
  fail:
  	hostapd_free_wps(wps);
  	return -1;
  }
  
  
  int hostapd_init_wps_complete(struct hostapd_data *hapd)
  {
  	struct wps_context *wps = hapd->wps;
  
  	if (wps == NULL)
  		return 0;
  
  #ifdef CONFIG_WPS_UPNP
  	if (hostapd_wps_upnp_init(hapd, wps) < 0) {
  		wpa_printf(MSG_ERROR, "Failed to initialize WPS UPnP");
  		wps_registrar_deinit(wps->registrar);
  		hostapd_free_wps(wps);
  		hapd->wps = NULL;
  		return -1;
  	}
  #endif /* CONFIG_WPS_UPNP */
  
  	return 0;
  }
  
  
  static void hostapd_wps_nfc_clear(struct wps_context *wps)
  {
  #ifdef CONFIG_WPS_NFC
  	wpa_printf(MSG_DEBUG, "WPS: Clear NFC Tag context %p", wps);
  	wps->ap_nfc_dev_pw_id = 0;
  	wpabuf_free(wps->ap_nfc_dh_pubkey);
  	wps->ap_nfc_dh_pubkey = NULL;
  	wpabuf_free(wps->ap_nfc_dh_privkey);
  	wps->ap_nfc_dh_privkey = NULL;
  	wpabuf_free(wps->ap_nfc_dev_pw);
  	wps->ap_nfc_dev_pw = NULL;
  #endif /* CONFIG_WPS_NFC */
  }
  
  
  void hostapd_deinit_wps(struct hostapd_data *hapd)
  {
  	eloop_cancel_timeout(hostapd_wps_reenable_ap_pin, hapd, NULL);
  	eloop_cancel_timeout(hostapd_wps_ap_pin_timeout, hapd, NULL);
  	eloop_cancel_timeout(wps_reload_config, hapd->iface, NULL);
  	if (hapd->wps == NULL) {
  		hostapd_wps_clear_ies(hapd, 1);
  		return;
  	}
  #ifdef CONFIG_WPS_UPNP
  	hostapd_wps_upnp_deinit(hapd);
  #endif /* CONFIG_WPS_UPNP */
  	wps_registrar_deinit(hapd->wps->registrar);
  	wps_free_pending_msgs(hapd->wps->upnp_msgs);
  	hostapd_free_wps(hapd->wps);
  	hapd->wps = NULL;
  	hostapd_wps_clear_ies(hapd, 1);
  }
  
  
  void hostapd_update_wps(struct hostapd_data *hapd)
  {
  	if (hapd->wps == NULL)
  		return;
  
  #ifdef CONFIG_WPS_UPNP
  	hapd->wps->friendly_name = hapd->conf->friendly_name;
  	hapd->wps->manufacturer_url = hapd->conf->manufacturer_url;
  	hapd->wps->model_description = hapd->conf->model_description;
  	hapd->wps->model_url = hapd->conf->model_url;
  	hapd->wps->upc = hapd->conf->upc;
  #endif /* CONFIG_WPS_UPNP */
  
  	hostapd_wps_set_vendor_ext(hapd, hapd->wps);
  
  	if (hapd->conf->wps_state)
  		wps_registrar_update_ie(hapd->wps->registrar);
  	else
  		hostapd_deinit_wps(hapd);
  }
  
  
  struct wps_add_pin_data {
  	const u8 *addr;
  	const u8 *uuid;
  	const u8 *pin;
  	size_t pin_len;
  	int timeout;
  	int added;
  };
  
  
  static int wps_add_pin(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_add_pin_data *data = ctx;
  	int ret;
  
  	if (hapd->wps == NULL)
  		return 0;
  	ret = wps_registrar_add_pin(hapd->wps->registrar, data->addr,
  				    data->uuid, data->pin, data->pin_len,
  				    data->timeout);
  	if (ret == 0)
  		data->added++;
  	return ret;
  }
  
  
  int hostapd_wps_add_pin(struct hostapd_data *hapd, const u8 *addr,
  			const char *uuid, const char *pin, int timeout)
  {
  	u8 u[UUID_LEN];
  	struct wps_add_pin_data data;
  
  	data.addr = addr;
  	data.uuid = u;
  	data.pin = (const u8 *) pin;
  	data.pin_len = os_strlen(pin);
  	data.timeout = timeout;
  	data.added = 0;
  
  	if (os_strcmp(uuid, "any") == 0)
  		data.uuid = NULL;
  	else {
  		if (uuid_str2bin(uuid, u))
  			return -1;
  		data.uuid = u;
  	}
  	if (hostapd_wps_for_each(hapd, wps_add_pin, &data) < 0)
  		return -1;
  	return data.added ? 0 : -1;
  }
  
  
  struct wps_button_pushed_ctx {
  	const u8 *p2p_dev_addr;
  	unsigned int count;
  };
  
  static int wps_button_pushed(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_button_pushed_ctx *data = ctx;
  
  	if (hapd->wps) {
  		data->count++;
  		return wps_registrar_button_pushed(hapd->wps->registrar,
  						   data->p2p_dev_addr);
  	}
  
  	return 0;
  }
  
  
  int hostapd_wps_button_pushed(struct hostapd_data *hapd,
  			      const u8 *p2p_dev_addr)
  {
  	struct wps_button_pushed_ctx ctx;
  	int ret;
  
  	os_memset(&ctx, 0, sizeof(ctx));
  	ctx.p2p_dev_addr = p2p_dev_addr;
  	ret = hostapd_wps_for_each(hapd, wps_button_pushed, &ctx);
  	if (ret == 0 && !ctx.count)
  		ret = -1;
  	return ret;
  }
  
  
  struct wps_cancel_ctx {
  	unsigned int count;
  };
  
  static int wps_cancel(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_cancel_ctx *data = ctx;
  
  	if (hapd->wps) {
  		data->count++;
  		wps_registrar_wps_cancel(hapd->wps->registrar);
  		ap_for_each_sta(hapd, ap_sta_wps_cancel, NULL);
  	}
  
  	return 0;
  }
  
  
  int hostapd_wps_cancel(struct hostapd_data *hapd)
  {
  	struct wps_cancel_ctx ctx;
  	int ret;
  
  	os_memset(&ctx, 0, sizeof(ctx));
  	ret = hostapd_wps_for_each(hapd, wps_cancel, &ctx);
  	if (ret == 0 && !ctx.count)
  		ret = -1;
  	return ret;
  }
  
  
  static int hostapd_wps_probe_req_rx(void *ctx, const u8 *addr, const u8 *da,
  				    const u8 *bssid,
  				    const u8 *ie, size_t ie_len,
  				    int ssi_signal)
  {
  	struct hostapd_data *hapd = ctx;
  	struct wpabuf *wps_ie;
  	struct ieee802_11_elems elems;
  
  	if (hapd->wps == NULL)
  		return 0;
  
  	if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
  		wpa_printf(MSG_DEBUG, "WPS: Could not parse ProbeReq from "
  			   MACSTR, MAC2STR(addr));
  		return 0;
  	}
  
  	if (elems.ssid && elems.ssid_len > 0 &&
  	    (elems.ssid_len != hapd->conf->ssid.ssid_len ||
  	     os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) !=
  	     0))
  		return 0; /* Not for us */
  
  	wps_ie = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
  	if (wps_ie == NULL)
  		return 0;
  	if (wps_validate_probe_req(wps_ie, addr) < 0) {
  		wpabuf_free(wps_ie);
  		return 0;
  	}
  
  	if (wpabuf_len(wps_ie) > 0) {
  		int p2p_wildcard = 0;
  #ifdef CONFIG_P2P
  		if (elems.ssid && elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
  		    os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
  			      P2P_WILDCARD_SSID_LEN) == 0)
  			p2p_wildcard = 1;
  #endif /* CONFIG_P2P */
  		wps_registrar_probe_req_rx(hapd->wps->registrar, addr, wps_ie,
  					   p2p_wildcard);
  #ifdef CONFIG_WPS_UPNP
  		/* FIX: what exactly should be included in the WLANEvent?
  		 * WPS attributes? Full ProbeReq frame? */
  		if (!p2p_wildcard)
  			upnp_wps_device_send_wlan_event(
  				hapd->wps_upnp, addr,
  				UPNP_WPS_WLANEVENT_TYPE_PROBE, wps_ie);
  #endif /* CONFIG_WPS_UPNP */
  	}
  
  	wpabuf_free(wps_ie);
  
  	return 0;
  }
  
  
  #ifdef CONFIG_WPS_UPNP
  
  static int hostapd_rx_req_put_wlan_response(
  	void *priv, enum upnp_wps_wlanevent_type ev_type,
  	const u8 *mac_addr, const struct wpabuf *msg,
  	enum wps_msg_type msg_type)
  {
  	struct hostapd_data *hapd = priv;
  	struct sta_info *sta;
  	struct upnp_pending_message *p;
  
  	wpa_printf(MSG_DEBUG, "WPS UPnP: PutWLANResponse ev_type=%d mac_addr="
  		   MACSTR, ev_type, MAC2STR(mac_addr));
  	wpa_hexdump(MSG_MSGDUMP, "WPS UPnP: PutWLANResponse NewMessage",
  		    wpabuf_head(msg), wpabuf_len(msg));
  	if (ev_type != UPNP_WPS_WLANEVENT_TYPE_EAP) {
  		wpa_printf(MSG_DEBUG, "WPS UPnP: Ignored unexpected "
  			   "PutWLANResponse WLANEventType %d", ev_type);
  		return -1;
  	}
  
  	/*
  	 * EAP response to ongoing to WPS Registration. Send it to EAP-WSC
  	 * server implementation for delivery to the peer.
  	 */
  
  	sta = ap_get_sta(hapd, mac_addr);
  #ifndef CONFIG_WPS_STRICT
  	if (!sta) {
  		/*
  		 * Workaround - Intel wsccmd uses bogus NewWLANEventMAC:
  		 * Pick STA that is in an ongoing WPS registration without
  		 * checking the MAC address.
  		 */
  		wpa_printf(MSG_DEBUG, "WPS UPnP: No matching STA found based "
  			   "on NewWLANEventMAC; try wildcard match");
  		for (sta = hapd->sta_list; sta; sta = sta->next) {
  			if (sta->eapol_sm && (sta->flags & WLAN_STA_WPS))
  				break;
  		}
  	}
  #endif /* CONFIG_WPS_STRICT */
  
  	if (!sta || !(sta->flags & WLAN_STA_WPS)) {
  		wpa_printf(MSG_DEBUG, "WPS UPnP: No matching STA found");
  		return 0;
  	}
  
  	if (!sta->eapol_sm) {
  		/*
  		 * This can happen, e.g., if an ER sends an extra message after
  		 * the station has disassociated (but not fully
  		 * deauthenticated).
  		 */
  		wpa_printf(MSG_DEBUG, "WPS UPnP: Matching STA did not have EAPOL state machine initialized");
  		return 0;
  	}
  
  	p = os_zalloc(sizeof(*p));
  	if (p == NULL)
  		return -1;
  	os_memcpy(p->addr, sta->addr, ETH_ALEN);
  	p->msg = wpabuf_dup(msg);
  	p->type = msg_type;
  	p->next = hapd->wps->upnp_msgs;
  	hapd->wps->upnp_msgs = p;
  
  	return eapol_auth_eap_pending_cb(sta->eapol_sm, sta->eapol_sm->eap);
  }
  
  
  static int hostapd_wps_upnp_init(struct hostapd_data *hapd,
  				 struct wps_context *wps)
  {
  	struct upnp_wps_device_ctx *ctx;
  
  	if (!hapd->conf->upnp_iface)
  		return 0;
  	ctx = os_zalloc(sizeof(*ctx));
  	if (ctx == NULL)
  		return -1;
  
  	ctx->rx_req_put_wlan_response = hostapd_rx_req_put_wlan_response;
  	if (hapd->conf->ap_pin)
  		ctx->ap_pin = os_strdup(hapd->conf->ap_pin);
  
  	hapd->wps_upnp = upnp_wps_device_init(ctx, wps, hapd,
  					      hapd->conf->upnp_iface);
  	if (hapd->wps_upnp == NULL)
  		return -1;
  	wps->wps_upnp = hapd->wps_upnp;
  
  	return 0;
  }
  
  
  static void hostapd_wps_upnp_deinit(struct hostapd_data *hapd)
  {
  	upnp_wps_device_deinit(hapd->wps_upnp, hapd);
  }
  
  #endif /* CONFIG_WPS_UPNP */
  
  
  int hostapd_wps_get_mib_sta(struct hostapd_data *hapd, const u8 *addr,
  			    char *buf, size_t buflen)
  {
  	if (hapd->wps == NULL)
  		return 0;
  	return wps_registrar_get_info(hapd->wps->registrar, addr, buf, buflen);
  }
  
  
  static void hostapd_wps_ap_pin_timeout(void *eloop_data, void *user_ctx)
  {
  	struct hostapd_data *hapd = eloop_data;
  	wpa_printf(MSG_DEBUG, "WPS: AP PIN timed out");
  	hostapd_wps_ap_pin_disable(hapd);
  	wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_PIN_DISABLED);
  }
  
  
  static void hostapd_wps_ap_pin_enable(struct hostapd_data *hapd, int timeout)
  {
  	wpa_printf(MSG_DEBUG, "WPS: Enabling AP PIN (timeout=%d)", timeout);
  	hapd->ap_pin_failures = 0;
  	hapd->ap_pin_failures_consecutive = 0;
  	hapd->conf->ap_setup_locked = 0;
  	if (hapd->wps->ap_setup_locked) {
  		wpa_msg(hapd->msg_ctx, MSG_INFO, WPS_EVENT_AP_SETUP_UNLOCKED);
  		hapd->wps->ap_setup_locked = 0;
  		wps_registrar_update_ie(hapd->wps->registrar);
  	}
  	eloop_cancel_timeout(hostapd_wps_ap_pin_timeout, hapd, NULL);
  	if (timeout > 0)
  		eloop_register_timeout(timeout, 0,
  				       hostapd_wps_ap_pin_timeout, hapd, NULL);
  }
  
  
  static int wps_ap_pin_disable(struct hostapd_data *hapd, void *ctx)
  {
  	os_free(hapd->conf->ap_pin);
  	hapd->conf->ap_pin = NULL;
  #ifdef CONFIG_WPS_UPNP
  	upnp_wps_set_ap_pin(hapd->wps_upnp, NULL);
  #endif /* CONFIG_WPS_UPNP */
  	eloop_cancel_timeout(hostapd_wps_ap_pin_timeout, hapd, NULL);
  	return 0;
  }
  
  
  void hostapd_wps_ap_pin_disable(struct hostapd_data *hapd)
  {
  	wpa_printf(MSG_DEBUG, "WPS: Disabling AP PIN");
  	hostapd_wps_for_each(hapd, wps_ap_pin_disable, NULL);
  }
  
  
  struct wps_ap_pin_data {
  	char pin_txt[9];
  	int timeout;
  };
  
  
  static int wps_ap_pin_set(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_ap_pin_data *data = ctx;
  
  	if (!hapd->wps)
  		return 0;
  
  	os_free(hapd->conf->ap_pin);
  	hapd->conf->ap_pin = os_strdup(data->pin_txt);
  #ifdef CONFIG_WPS_UPNP
  	upnp_wps_set_ap_pin(hapd->wps_upnp, data->pin_txt);
  #endif /* CONFIG_WPS_UPNP */
  	hostapd_wps_ap_pin_enable(hapd, data->timeout);
  	return 0;
  }
  
  
  const char * hostapd_wps_ap_pin_random(struct hostapd_data *hapd, int timeout)
  {
  	unsigned int pin;
  	struct wps_ap_pin_data data;
  
  	pin = wps_generate_pin();
  	os_snprintf(data.pin_txt, sizeof(data.pin_txt), "%08u", pin);
  	data.timeout = timeout;
  	hostapd_wps_for_each(hapd, wps_ap_pin_set, &data);
  	return hapd->conf->ap_pin;
  }
  
  
  const char * hostapd_wps_ap_pin_get(struct hostapd_data *hapd)
  {
  	return hapd->conf->ap_pin;
  }
  
  
  int hostapd_wps_ap_pin_set(struct hostapd_data *hapd, const char *pin,
  			   int timeout)
  {
  	struct wps_ap_pin_data data;
  	int ret;
  
  	ret = os_snprintf(data.pin_txt, sizeof(data.pin_txt), "%s", pin);
  	if (os_snprintf_error(sizeof(data.pin_txt), ret))
  		return -1;
  	data.timeout = timeout;
  	return hostapd_wps_for_each(hapd, wps_ap_pin_set, &data);
  }
  
  
  static int wps_update_ie(struct hostapd_data *hapd, void *ctx)
  {
  	if (hapd->wps)
  		wps_registrar_update_ie(hapd->wps->registrar);
  	return 0;
  }
  
  
  void hostapd_wps_update_ie(struct hostapd_data *hapd)
  {
  	hostapd_wps_for_each(hapd, wps_update_ie, NULL);
  }
  
  
  int hostapd_wps_config_ap(struct hostapd_data *hapd, const char *ssid,
  			  const char *auth, const char *encr, const char *key)
  {
  	struct wps_credential cred;
  	size_t len;
  
  	os_memset(&cred, 0, sizeof(cred));
  
  	len = os_strlen(ssid);
  	if ((len & 1) || len > 2 * sizeof(cred.ssid) ||
  	    hexstr2bin(ssid, cred.ssid, len / 2))
  		return -1;
  	cred.ssid_len = len / 2;
  
  	if (os_strncmp(auth, "OPEN", 4) == 0)
  		cred.auth_type = WPS_AUTH_OPEN;
  	else if (os_strncmp(auth, "WPAPSK", 6) == 0)
  		cred.auth_type = WPS_AUTH_WPAPSK;
  	else if (os_strncmp(auth, "WPA2PSK", 7) == 0)
  		cred.auth_type = WPS_AUTH_WPA2PSK;
  	else
  		return -1;
  
  	if (encr) {
  		if (os_strncmp(encr, "NONE", 4) == 0)
  			cred.encr_type = WPS_ENCR_NONE;
  		else if (os_strncmp(encr, "TKIP", 4) == 0)
  			cred.encr_type = WPS_ENCR_TKIP;
  		else if (os_strncmp(encr, "CCMP", 4) == 0)
  			cred.encr_type = WPS_ENCR_AES;
  		else
  			return -1;
  	} else
  		cred.encr_type = WPS_ENCR_NONE;
  
  	if (key) {
  		len = os_strlen(key);
  		if ((len & 1) || len > 2 * sizeof(cred.key) ||
  		    hexstr2bin(key, cred.key, len / 2))
  			return -1;
  		cred.key_len = len / 2;
  	}
  
  	return wps_registrar_config_ap(hapd->wps->registrar, &cred);
  }
  
  
  #ifdef CONFIG_WPS_NFC
  
  struct wps_nfc_password_token_data {
  	const u8 *oob_dev_pw;
  	size_t oob_dev_pw_len;
  	int added;
  };
  
  
  static int wps_add_nfc_password_token(struct hostapd_data *hapd, void *ctx)
  {
  	struct wps_nfc_password_token_data *data = ctx;
  	int ret;
  
  	if (hapd->wps == NULL)
  		return 0;
  	ret = wps_registrar_add_nfc_password_token(hapd->wps->registrar,
  						   data->oob_dev_pw,
  						   data->oob_dev_pw_len);
  	if (ret == 0)
  		data->added++;
  	return ret;
  }
  
  
  static int hostapd_wps_add_nfc_password_token(struct hostapd_data *hapd,
  					      struct wps_parse_attr *attr)
  {
  	struct wps_nfc_password_token_data data;
  
  	data.oob_dev_pw = attr->oob_dev_password;
  	data.oob_dev_pw_len = attr->oob_dev_password_len;
  	data.added = 0;
  	if (hostapd_wps_for_each(hapd, wps_add_nfc_password_token, &data) < 0)
  		return -1;
  	return data.added ? 0 : -1;
  }
  
  
  static int hostapd_wps_nfc_tag_process(struct hostapd_data *hapd,
  				       const struct wpabuf *wps)
  {
  	struct wps_parse_attr attr;
  
  	wpa_hexdump_buf(MSG_DEBUG, "WPS: Received NFC tag payload", wps);
  
  	if (wps_parse_msg(wps, &attr)) {
  		wpa_printf(MSG_DEBUG, "WPS: Ignore invalid data from NFC tag");
  		return -1;
  	}
  
  	if (attr.oob_dev_password)
  		return hostapd_wps_add_nfc_password_token(hapd, &attr);
  
  	wpa_printf(MSG_DEBUG, "WPS: Ignore unrecognized NFC tag");
  	return -1;
  }
  
  
  int hostapd_wps_nfc_tag_read(struct hostapd_data *hapd,
  			     const struct wpabuf *data)
  {
  	const struct wpabuf *wps = data;
  	struct wpabuf *tmp = NULL;
  	int ret;
  
  	if (wpabuf_len(data) < 4)
  		return -1;
  
  	if (*wpabuf_head_u8(data) != 0x10) {
  		/* Assume this contains full NDEF record */
  		tmp = ndef_parse_wifi(data);
  		if (tmp == NULL) {
  			wpa_printf(MSG_DEBUG, "WPS: Could not parse NDEF");
  			return -1;
  		}
  		wps = tmp;
  	}
  
  	ret = hostapd_wps_nfc_tag_process(hapd, wps);
  	wpabuf_free(tmp);
  	return ret;
  }
  
  
  struct wpabuf * hostapd_wps_nfc_config_token(struct hostapd_data *hapd,
  					     int ndef)
  {
  	struct wpabuf *ret;
  
  	if (hapd->wps == NULL)
  		return NULL;
  
  	ret = wps_get_oob_cred(hapd->wps, hostapd_wps_rf_band_cb(hapd),
  			       hapd->iconf->channel);
  	if (ndef && ret) {
  		struct wpabuf *tmp;
  		tmp = ndef_build_wifi(ret);
  		wpabuf_free(ret);
  		if (tmp == NULL)
  			return NULL;
  		ret = tmp;
  	}
  
  	return ret;
  }
  
  
  struct wpabuf * hostapd_wps_nfc_hs_cr(struct hostapd_data *hapd, int ndef)
  {
  	struct wpabuf *ret;
  
  	if (hapd->wps == NULL)
  		return NULL;
  
  	if (hapd->conf->wps_nfc_dh_pubkey == NULL) {
  		struct wps_context *wps = hapd->wps;
  		if (wps_nfc_gen_dh(&hapd->conf->wps_nfc_dh_pubkey,
  				   &hapd->conf->wps_nfc_dh_privkey) < 0)
  			return NULL;
  		hostapd_wps_nfc_clear(wps);
  		wps->ap_nfc_dev_pw_id = DEV_PW_NFC_CONNECTION_HANDOVER;
  		wps->ap_nfc_dh_pubkey =
  			wpabuf_dup(hapd->conf->wps_nfc_dh_pubkey);
  		wps->ap_nfc_dh_privkey =
  			wpabuf_dup(hapd->conf->wps_nfc_dh_privkey);
  		if (!wps->ap_nfc_dh_pubkey || !wps->ap_nfc_dh_privkey) {
  			hostapd_wps_nfc_clear(wps);
  			return NULL;
  		}
  	}
  
  	ret = wps_build_nfc_handover_sel(hapd->wps,
  					 hapd->conf->wps_nfc_dh_pubkey,
  					 hapd->own_addr, hapd->iface->freq);
  
  	if (ndef && ret) {
  		struct wpabuf *tmp;
  		tmp = ndef_build_wifi(ret);
  		wpabuf_free(ret);
  		if (tmp == NULL)
  			return NULL;
  		ret = tmp;
  	}
  
  	return ret;
  }
  
  
  int hostapd_wps_nfc_report_handover(struct hostapd_data *hapd,
  				    const struct wpabuf *req,
  				    const struct wpabuf *sel)
  {
  	struct wpabuf *wps;
  	int ret = -1;
  	u16 wsc_len;
  	const u8 *pos;
  	struct wpabuf msg;
  	struct wps_parse_attr attr;
  	u16 dev_pw_id;
  
  	/*
  	 * Enrollee/station is always initiator of the NFC connection handover,
  	 * so use the request message here to find Enrollee public key hash.
  	 */
  	wps = ndef_parse_wifi(req);
  	if (wps == NULL)
  		return -1;
  	wpa_printf(MSG_DEBUG, "WPS: Received application/vnd.wfa.wsc "
  		   "payload from NFC connection handover");
  	wpa_hexdump_buf(MSG_DEBUG, "WPS: NFC payload", wps);
  	if (wpabuf_len(wps) < 2) {
  		wpa_printf(MSG_DEBUG, "WPS: Too short Wi-Fi Handover Request "
  			   "Message");
  		goto out;
  	}
  	pos = wpabuf_head(wps);
  	wsc_len = WPA_GET_BE16(pos);
  	if (wsc_len > wpabuf_len(wps) - 2) {
  		wpa_printf(MSG_DEBUG, "WPS: Invalid WSC attribute length (%u) "
  			   "in rt Wi-Fi Handover Request Message", wsc_len);
  		goto out;
  	}
  	pos += 2;
  
  	wpa_hexdump(MSG_DEBUG,
  		    "WPS: WSC attributes in Wi-Fi Handover Request Message",
  		    pos, wsc_len);
  	if (wsc_len < wpabuf_len(wps) - 2) {
  		wpa_hexdump(MSG_DEBUG,
  			    "WPS: Ignore extra data after WSC attributes",
  			    pos + wsc_len, wpabuf_len(wps) - 2 - wsc_len);
  	}
  
  	wpabuf_set(&msg, pos, wsc_len);
  	ret = wps_parse_msg(&msg, &attr);
  	if (ret < 0) {
  		wpa_printf(MSG_DEBUG, "WPS: Could not parse WSC attributes in "
  			   "Wi-Fi Handover Request Message");
  		goto out;
  	}
  
  	if (attr.oob_dev_password == NULL ||
  	    attr.oob_dev_password_len < WPS_OOB_PUBKEY_HASH_LEN + 2) {
  		wpa_printf(MSG_DEBUG, "WPS: No Out-of-Band Device Password "
  			   "included in Wi-Fi Handover Request Message");
  		ret = -1;
  		goto out;
  	}
  
  	if (attr.uuid_e == NULL) {
  		wpa_printf(MSG_DEBUG, "WPS: No UUID-E included in Wi-Fi "
  			   "Handover Request Message");
  		ret = -1;
  		goto out;
  	}
  
  	wpa_hexdump(MSG_DEBUG, "WPS: UUID-E", attr.uuid_e, WPS_UUID_LEN);
  
  	wpa_hexdump(MSG_DEBUG, "WPS: Out-of-Band Device Password",
  		    attr.oob_dev_password, attr.oob_dev_password_len);
  	dev_pw_id = WPA_GET_BE16(attr.oob_dev_password +
  				 WPS_OOB_PUBKEY_HASH_LEN);
  	if (dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER) {
  		wpa_printf(MSG_DEBUG, "WPS: Unexpected OOB Device Password ID "
  			   "%u in Wi-Fi Handover Request Message", dev_pw_id);
  		ret = -1;
  		goto out;
  	}
  	wpa_hexdump(MSG_DEBUG, "WPS: Enrollee Public Key hash",
  		    attr.oob_dev_password, WPS_OOB_PUBKEY_HASH_LEN);
  
  	ret = wps_registrar_add_nfc_pw_token(hapd->wps->registrar,
  					     attr.oob_dev_password,
  					     DEV_PW_NFC_CONNECTION_HANDOVER,
  					     NULL, 0, 1);
  
  out:
  	wpabuf_free(wps);
  	return ret;
  }
  
  
  struct wpabuf * hostapd_wps_nfc_token_gen(struct hostapd_data *hapd, int ndef)
  {
  	if (hapd->conf->wps_nfc_pw_from_config) {
  		return wps_nfc_token_build(ndef,
  					   hapd->conf->wps_nfc_dev_pw_id,
  					   hapd->conf->wps_nfc_dh_pubkey,
  					   hapd->conf->wps_nfc_dev_pw);
  	}
  
  	return wps_nfc_token_gen(ndef, &hapd->conf->wps_nfc_dev_pw_id,
  				 &hapd->conf->wps_nfc_dh_pubkey,
  				 &hapd->conf->wps_nfc_dh_privkey,
  				 &hapd->conf->wps_nfc_dev_pw);
  }
  
  
  int hostapd_wps_nfc_token_enable(struct hostapd_data *hapd)
  {
  	struct wps_context *wps = hapd->wps;
  	struct wpabuf *pw;
  
  	if (wps == NULL)
  		return -1;
  
  	if (!hapd->conf->wps_nfc_dh_pubkey ||
  	    !hapd->conf->wps_nfc_dh_privkey ||
  	    !hapd->conf->wps_nfc_dev_pw ||
  	    !hapd->conf->wps_nfc_dev_pw_id)
  		return -1;
  
  	hostapd_wps_nfc_clear(wps);
  	wpa_printf(MSG_DEBUG,
  		   "WPS: Enable NFC Tag (Dev Pw Id %u) for AP interface %s (context %p)",
  		   hapd->conf->wps_nfc_dev_pw_id, hapd->conf->iface, wps);
  	wps->ap_nfc_dev_pw_id = hapd->conf->wps_nfc_dev_pw_id;
  	wps->ap_nfc_dh_pubkey = wpabuf_dup(hapd->conf->wps_nfc_dh_pubkey);
  	wps->ap_nfc_dh_privkey = wpabuf_dup(hapd->conf->wps_nfc_dh_privkey);
  	pw = hapd->conf->wps_nfc_dev_pw;
  	wps->ap_nfc_dev_pw = wpabuf_alloc(
  		wpabuf_len(pw) * 2 + 1);
  	if (wps->ap_nfc_dev_pw) {
  		wpa_snprintf_hex_uppercase(
  			(char *) wpabuf_put(wps->ap_nfc_dev_pw,
  					    wpabuf_len(pw) * 2),
  			wpabuf_len(pw) * 2 + 1,
  			wpabuf_head(pw), wpabuf_len(pw));
  	}
  
  	if (!wps->ap_nfc_dh_pubkey || !wps->ap_nfc_dh_privkey ||
  	    !wps->ap_nfc_dev_pw) {
  		hostapd_wps_nfc_clear(wps);
  		return -1;
  	}
  
  	return 0;
  }
  
  
  void hostapd_wps_nfc_token_disable(struct hostapd_data *hapd)
  {
  	wpa_printf(MSG_DEBUG, "WPS: Disable NFC token for AP interface %s",
  		   hapd->conf->iface);
  	hostapd_wps_nfc_clear(hapd->wps);
  }
  
  #endif /* CONFIG_WPS_NFC */
  