text: /*
   * hostapd / IEEE 802.11 Management: Beacon and Probe Request/Response
   * Copyright (c) 2002-2004, Instant802 Networks, Inc.
   * Copyright (c) 2005-2006, Devicescape Software, Inc.
   * Copyright (c) 2008-2009, Jouni Malinen <j@w1.fi>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   * Alternatively, this software may be distributed under the terms of BSD
   * license.
   *
   * See README and COPYING for more details.
   */
  
  #include "utils/includes.h"
  
  #ifndef CONFIG_NATIVE_WINDOWS
  
  #include "utils/common.h"
  #include "common/ieee802_11_defs.h"
  #include "common/ieee802_11_common.h"
  #include "drivers/driver.h"
  #include "wps/wps_defs.h"
  #include "p2p/p2p.h"
  #include "hostapd.h"
  #include "ieee802_11.h"
  #include "wpa_auth.h"
  #include "wmm.h"
  #include "ap_config.h"
  #include "sta_info.h"
  #include "p2p_hostapd.h"
  #include "ap_drv_ops.h"
  #include "beacon.h"
  
  
  #ifdef NEED_AP_MLME
  
  static u8 ieee802_11_erp_info(struct hostapd_data *hapd)
  {
  	u8 erp = 0;
  
  	if (hapd->iface->current_mode == NULL ||
  	    hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  		return 0;
  
  	if (hapd->iface->olbc)
  		erp |= ERP_INFO_USE_PROTECTION;
  	if (hapd->iface->num_sta_non_erp > 0) {
  		erp |= ERP_INFO_NON_ERP_PRESENT |
  			ERP_INFO_USE_PROTECTION;
  	}
  	if (hapd->iface->num_sta_no_short_preamble > 0 ||
  	    hapd->iconf->preamble == LONG_PREAMBLE)
  		erp |= ERP_INFO_BARKER_PREAMBLE_MODE;
  
  	return erp;
  }
  
  
  static u8 * hostapd_eid_ds_params(struct hostapd_data *hapd, u8 *eid)
  {
  	*eid++ = WLAN_EID_DS_PARAMS;
  	*eid++ = 1;
  	*eid++ = hapd->iconf->channel;
  	return eid;
  }
  
  
  static u8 * hostapd_eid_erp_info(struct hostapd_data *hapd, u8 *eid)
  {
  	if (hapd->iface->current_mode == NULL ||
  	    hapd->iface->current_mode->mode != HOSTAPD_MODE_IEEE80211G)
  		return eid;
  
  	/* Set NonERP_present and use_protection bits if there
  	 * are any associated NonERP stations. */
  	/* TODO: use_protection bit can be set to zero even if
  	 * there are NonERP stations present. This optimization
  	 * might be useful if NonERP stations are "quiet".
  	 * See 802.11g/D6 E-1 for recommended practice.
  	 * In addition, Non ERP present might be set, if AP detects Non ERP
  	 * operation on other APs. */
  
  	/* Add ERP Information element */
  	*eid++ = WLAN_EID_ERP_INFO;
  	*eid++ = 1;
  	*eid++ = ieee802_11_erp_info(hapd);
  
  	return eid;
  }
  
  
  static u8 * hostapd_eid_country_add(u8 *pos, u8 *end, int chan_spacing,
  				    struct hostapd_channel_data *start,
  				    struct hostapd_channel_data *prev)
  {
  	if (end - pos < 3)
  		return pos;
  
  	/* first channel number */
  	*pos++ = start->chan;
  	/* number of channels */
  	*pos++ = (prev->chan - start->chan) / chan_spacing + 1;
  	/* maximum transmit power level */
  	*pos++ = start->max_tx_power;
  
  	return pos;
  }
  
  
  static u8 * hostapd_eid_country(struct hostapd_data *hapd, u8 *eid,
  				int max_len)
  {
  	u8 *pos = eid;
  	u8 *end = eid + max_len;
  	int i;
  	struct hostapd_hw_modes *mode;
  	struct hostapd_channel_data *start, *prev;
  	int chan_spacing = 1;
  
  	if (!hapd->iconf->ieee80211d || max_len < 6 ||
  	    hapd->iface->current_mode == NULL)
  		return eid;
  
  	*pos++ = WLAN_EID_COUNTRY;
  	pos++; /* length will be set later */
  	os_memcpy(pos, hapd->iconf->country, 3); /* e.g., 'US ' */
  	pos += 3;
  
  	mode = hapd->iface->current_mode;
  	if (mode->mode == HOSTAPD_MODE_IEEE80211A)
  		chan_spacing = 4;
  
  	start = prev = NULL;
  	for (i = 0; i < mode->num_channels; i++) {
  		struct hostapd_channel_data *chan = &mode->channels[i];
  		if (chan->flag & HOSTAPD_CHAN_DISABLED)
  			continue;
  		if (start && prev &&
  		    prev->chan + chan_spacing == chan->chan &&
  		    start->max_tx_power == chan->max_tx_power) {
  			prev = chan;
  			continue; /* can use same entry */
  		}
  
  		if (start) {
  			pos = hostapd_eid_country_add(pos, end, chan_spacing,
  						      start, prev);
  			start = NULL;
  		}
  
  		/* Start new group */
  		start = prev = chan;
  	}
  
  	if (start) {
  		pos = hostapd_eid_country_add(pos, end, chan_spacing,
  					      start, prev);
  	}
  
  	if ((pos - eid) & 1) {
  		if (end - pos < 1)
  			return eid;
  		*pos++ = 0; /* pad for 16-bit alignment */
  	}
  
  	eid[1] = (pos - eid) - 2;
  
  	return pos;
  }
  
  
  static u8 * hostapd_eid_wpa(struct hostapd_data *hapd, u8 *eid, size_t len)
  {
  	const u8 *ie;
  	size_t ielen;
  
  	ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &ielen);
  	if (ie == NULL || ielen > len)
  		return eid;
  
  	os_memcpy(eid, ie, ielen);
  	return eid + ielen;
  }
  
  
  static u8 * hostapd_gen_probe_resp(struct hostapd_data *hapd,
  				   struct sta_info *sta,
  				   const struct ieee80211_mgmt *req,
  				   int is_p2p, size_t *resp_len)
  {
  	struct ieee80211_mgmt *resp;
  	u8 *pos, *epos;
  	size_t buflen;
  
  #define MAX_PROBERESP_LEN 768
  	buflen = MAX_PROBERESP_LEN;
  #ifdef CONFIG_WPS
  	if (hapd->wps_probe_resp_ie)
  		buflen += wpabuf_len(hapd->wps_probe_resp_ie);
  #endif /* CONFIG_WPS */
  #ifdef CONFIG_P2P
  	if (hapd->p2p_probe_resp_ie)
  		buflen += wpabuf_len(hapd->p2p_probe_resp_ie);
  #endif /* CONFIG_P2P */
  	resp = os_zalloc(buflen);
  	if (resp == NULL)
  		return NULL;
  
  	epos = ((u8 *) resp) + MAX_PROBERESP_LEN;
  
  	resp->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
  					   WLAN_FC_STYPE_PROBE_RESP);
  	if (req)
  		os_memcpy(resp->da, req->sa, ETH_ALEN);
  	os_memcpy(resp->sa, hapd->own_addr, ETH_ALEN);
  
  	os_memcpy(resp->bssid, hapd->own_addr, ETH_ALEN);
  	resp->u.probe_resp.beacon_int =
  		host_to_le16(hapd->iconf->beacon_int);
  
  	/* hardware or low-level driver will setup seq_ctrl and timestamp */
  	resp->u.probe_resp.capab_info =
  		host_to_le16(hostapd_own_capab_info(hapd, sta, 1));
  
  	pos = resp->u.probe_resp.variable;
  	*pos++ = WLAN_EID_SSID;
  	*pos++ = hapd->conf->ssid.ssid_len;
  	os_memcpy(pos, hapd->conf->ssid.ssid, hapd->conf->ssid.ssid_len);
  	pos += hapd->conf->ssid.ssid_len;
  
  	/* Supported rates */
  	pos = hostapd_eid_supp_rates(hapd, pos);
  
  	/* DS Params */
  	pos = hostapd_eid_ds_params(hapd, pos);
  
  	pos = hostapd_eid_country(hapd, pos, epos - pos);
  
  	/* ERP Information element */
  	pos = hostapd_eid_erp_info(hapd, pos);
  
  	/* Extended supported rates */
  	pos = hostapd_eid_ext_supp_rates(hapd, pos);
  
  	/* RSN, MDIE, WPA */
  	pos = hostapd_eid_wpa(hapd, pos, epos - pos);
  
  #ifdef CONFIG_IEEE80211N
  	pos = hostapd_eid_ht_capabilities(hapd, pos);
  	pos = hostapd_eid_ht_operation(hapd, pos);
  #endif /* CONFIG_IEEE80211N */
  
  	pos = hostapd_eid_ext_capab(hapd, pos);
  
  	pos = hostapd_eid_time_adv(hapd, pos);
  	pos = hostapd_eid_time_zone(hapd, pos);
  
  	pos = hostapd_eid_interworking(hapd, pos);
  	pos = hostapd_eid_adv_proto(hapd, pos);
  	pos = hostapd_eid_roaming_consortium(hapd, pos);
  
  #ifdef CONFIG_IEEE80211AC
  	pos = hostapd_eid_vht_capabilities(hapd, pos);
  	pos = hostapd_eid_vht_operation(hapd, pos);
  #endif /* CONFIG_IEEE80211AC */
  
  	/* Wi-Fi Alliance WMM */
  	pos = hostapd_eid_wmm(hapd, pos);
  
  #ifdef CONFIG_WPS
  	if (hapd->conf->wps_state && hapd->wps_probe_resp_ie) {
  		os_memcpy(pos, wpabuf_head(hapd->wps_probe_resp_ie),
  			  wpabuf_len(hapd->wps_probe_resp_ie));
  		pos += wpabuf_len(hapd->wps_probe_resp_ie);
  	}
  #endif /* CONFIG_WPS */
  
  #ifdef CONFIG_P2P
  	if ((hapd->conf->p2p & P2P_ENABLED) && is_p2p &&
  	    hapd->p2p_probe_resp_ie) {
  		os_memcpy(pos, wpabuf_head(hapd->p2p_probe_resp_ie),
  			  wpabuf_len(hapd->p2p_probe_resp_ie));
  		pos += wpabuf_len(hapd->p2p_probe_resp_ie);
  	}
  #endif /* CONFIG_P2P */
  #ifdef CONFIG_P2P_MANAGER
  	if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
  	    P2P_MANAGE)
  		pos = hostapd_eid_p2p_manage(hapd, pos);
  #endif /* CONFIG_P2P_MANAGER */
  
  	*resp_len = pos - (u8 *) resp;
  	return (u8 *) resp;
  }
  
  
  void handle_probe_req(struct hostapd_data *hapd,
  		      const struct ieee80211_mgmt *mgmt, size_t len,
  		      int ssi_signal)
  {
  	u8 *resp;
  	struct ieee802_11_elems elems;
  	const u8 *ie;
  	size_t ie_len;
  	struct sta_info *sta = NULL;
  	size_t i, resp_len;
  	int noack;
  
  	ie = mgmt->u.probe_req.variable;
  	if (len < IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req))
  		return;
  	ie_len = len - (IEEE80211_HDRLEN + sizeof(mgmt->u.probe_req));
  
  	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
  		if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
  					    mgmt->sa, mgmt->da, mgmt->bssid,
  					    ie, ie_len, ssi_signal) > 0)
  			return;
  
  	if (!hapd->iconf->send_probe_response)
  		return;
  
  	if (ieee802_11_parse_elems(ie, ie_len, &elems, 0) == ParseFailed) {
  		wpa_printf(MSG_DEBUG, "Could not parse ProbeReq from " MACSTR,
  			   MAC2STR(mgmt->sa));
  		return;
  	}
  
  	if ((!elems.ssid || !elems.supp_rates)) {
  		wpa_printf(MSG_DEBUG, "STA " MACSTR " sent probe request "
  			   "without SSID or supported rates element",
  			   MAC2STR(mgmt->sa));
  		return;
  	}
  
  #ifdef CONFIG_P2P
  	if (hapd->p2p && elems.wps_ie) {
  		struct wpabuf *wps;
  		wps = ieee802_11_vendor_ie_concat(ie, ie_len, WPS_DEV_OUI_WFA);
  		if (wps && !p2p_group_match_dev_type(hapd->p2p_group, wps)) {
  			wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
  				   "due to mismatch with Requested Device "
  				   "Type");
  			wpabuf_free(wps);
  			return;
  		}
  		wpabuf_free(wps);
  	}
  
  	if (hapd->p2p && elems.p2p) {
  		struct wpabuf *p2p;
  		p2p = ieee802_11_vendor_ie_concat(ie, ie_len, P2P_IE_VENDOR_TYPE);
  		if (p2p && !p2p_group_match_dev_id(hapd->p2p_group, p2p)) {
  			wpa_printf(MSG_MSGDUMP, "P2P: Ignore Probe Request "
  				   "due to mismatch with Device ID");
  			wpabuf_free(p2p);
  			return;
  		}
  		wpabuf_free(p2p);
  	}
  #endif /* CONFIG_P2P */
  
  	if (hapd->conf->ignore_broadcast_ssid && elems.ssid_len == 0) {
  		wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR " for "
  			   "broadcast SSID ignored", MAC2STR(mgmt->sa));
  		return;
  	}
  
  	sta = ap_get_sta(hapd, mgmt->sa);
  
  #ifdef CONFIG_P2P
  	if ((hapd->conf->p2p & P2P_GROUP_OWNER) &&
  	    elems.ssid_len == P2P_WILDCARD_SSID_LEN &&
  	    os_memcmp(elems.ssid, P2P_WILDCARD_SSID,
  		      P2P_WILDCARD_SSID_LEN) == 0) {
  		/* Process P2P Wildcard SSID like Wildcard SSID */
  		elems.ssid_len = 0;
  	}
  #endif /* CONFIG_P2P */
  
  	if (elems.ssid_len == 0 ||
  	    (elems.ssid_len == hapd->conf->ssid.ssid_len &&
  	     os_memcmp(elems.ssid, hapd->conf->ssid.ssid, elems.ssid_len) ==
  	     0)) {
  		if (sta)
  			sta->ssid_probe = &hapd->conf->ssid;
  	} else {
  		if (!(mgmt->da[0] & 0x01)) {
  			char ssid_txt[33];
  			ieee802_11_print_ssid(ssid_txt, elems.ssid,
  					      elems.ssid_len);
  			wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
  				   " for foreign SSID '%s' (DA " MACSTR ")",
  				   MAC2STR(mgmt->sa), ssid_txt,
  				   MAC2STR(mgmt->da));
  		}
  		return;
  	}
  
  #ifdef CONFIG_INTERWORKING
  	if (elems.interworking && elems.interworking_len >= 1) {
  		u8 ant = elems.interworking[0] & 0x0f;
  		if (ant != INTERWORKING_ANT_WILDCARD &&
  		    ant != hapd->conf->access_network_type) {
  			wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
  				   " for mismatching ANT %u ignored",
  				   MAC2STR(mgmt->sa), ant);
  			return;
  		}
  	}
  
  	if (elems.interworking &&
  	    (elems.interworking_len == 7 || elems.interworking_len == 9)) {
  		const u8 *hessid;
  		if (elems.interworking_len == 7)
  			hessid = elems.interworking + 1;
  		else
  			hessid = elems.interworking + 1 + 2;
  		if (!is_broadcast_ether_addr(hessid) &&
  		    os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
  			wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
  				   " for mismatching HESSID " MACSTR
  				   " ignored",
  				   MAC2STR(mgmt->sa), MAC2STR(hessid));
  			return;
  		}
  	}
  #endif /* CONFIG_INTERWORKING */
  
  	/* TODO: verify that supp_rates contains at least one matching rate
  	 * with AP configuration */
  
  	resp = hostapd_gen_probe_resp(hapd, sta, mgmt, elems.p2p != NULL,
  				      &resp_len);
  	if (resp == NULL)
  		return;
  
  	/*
  	 * If this is a broadcast probe request, apply no ack policy to avoid
  	 * excessive retries.
  	 */
  	noack = !!(elems.ssid_len == 0 && is_broadcast_ether_addr(mgmt->da));
  
  	if (hostapd_drv_send_mlme(hapd, resp, resp_len, noack) < 0)
  		perror("handle_probe_req: send");
  
  	os_free(resp);
  
  	wpa_printf(MSG_EXCESSIVE, "STA " MACSTR " sent probe request for %s "
  		   "SSID", MAC2STR(mgmt->sa),
  		   elems.ssid_len == 0 ? "broadcast" : "our");
  }
  
  
  static u8 * hostapd_probe_resp_offloads(struct hostapd_data *hapd,
  					size_t *resp_len)
  {
  	/* check probe response offloading caps and print warnings */
  	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD))
  		return NULL;
  
  #ifdef CONFIG_WPS
  	if (hapd->conf->wps_state && hapd->wps_probe_resp_ie &&
  	    (!(hapd->iface->probe_resp_offloads &
  	       (WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS |
  		WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2))))
  		wpa_printf(MSG_WARNING, "Device is trying to offload WPS "
  			   "Probe Response while not supporting this");
  #endif /* CONFIG_WPS */
  
  #ifdef CONFIG_P2P
  	if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_probe_resp_ie &&
  	    !(hapd->iface->probe_resp_offloads &
  	      WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P))
  		wpa_printf(MSG_WARNING, "Device is trying to offload P2P "
  			   "Probe Response while not supporting this");
  #endif  /* CONFIG_P2P */
  
  	if (hapd->conf->interworking &&
  	    !(hapd->iface->probe_resp_offloads &
  	      WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING))
  		wpa_printf(MSG_WARNING, "Device is trying to offload "
  			   "Interworking Probe Response while not supporting "
  			   "this");
  
  	/* Generate a Probe Response template for the non-P2P case */
  	return hostapd_gen_probe_resp(hapd, NULL, NULL, 0, resp_len);
  }
  
  #endif /* NEED_AP_MLME */
  
  
  void ieee802_11_set_beacon(struct hostapd_data *hapd)
  {
  	struct ieee80211_mgmt *head = NULL;
  	u8 *tail = NULL;
  	size_t head_len = 0, tail_len = 0;
  	u8 *resp = NULL;
  	size_t resp_len = 0;
  	struct wpa_driver_ap_params params;
  	struct wpabuf *beacon, *proberesp, *assocresp;
  #ifdef NEED_AP_MLME
  	u16 capab_info;
  	u8 *pos, *tailpos;
  #endif /* NEED_AP_MLME */
  
  	hapd->beacon_set_done = 1;
  
  #ifdef NEED_AP_MLME
  
  #define BEACON_HEAD_BUF_SIZE 256
  #define BEACON_TAIL_BUF_SIZE 512
  	head = os_zalloc(BEACON_HEAD_BUF_SIZE);
  	tail_len = BEACON_TAIL_BUF_SIZE;
  #ifdef CONFIG_WPS
  	if (hapd->conf->wps_state && hapd->wps_beacon_ie)
  		tail_len += wpabuf_len(hapd->wps_beacon_ie);
  #endif /* CONFIG_WPS */
  #ifdef CONFIG_P2P
  	if (hapd->p2p_beacon_ie)
  		tail_len += wpabuf_len(hapd->p2p_beacon_ie);
  #endif /* CONFIG_P2P */
  	tailpos = tail = os_malloc(tail_len);
  	if (head == NULL || tail == NULL) {
  		wpa_printf(MSG_ERROR, "Failed to set beacon data");
  		os_free(head);
  		os_free(tail);
  		return;
  	}
  
  	head->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
  					   WLAN_FC_STYPE_BEACON);
  	head->duration = host_to_le16(0);
  	os_memset(head->da, 0xff, ETH_ALEN);
  
  	os_memcpy(head->sa, hapd->own_addr, ETH_ALEN);
  	os_memcpy(head->bssid, hapd->own_addr, ETH_ALEN);
  	head->u.beacon.beacon_int =
  		host_to_le16(hapd->iconf->beacon_int);
  
  	/* hardware or low-level driver will setup seq_ctrl and timestamp */
  	capab_info = hostapd_own_capab_info(hapd, NULL, 0);
  	head->u.beacon.capab_info = host_to_le16(capab_info);
  	pos = &head->u.beacon.variable[0];
  
  	/* SSID */
  	*pos++ = WLAN_EID_SSID;
  	if (hapd->conf->ignore_broadcast_ssid == 2) {
  		/* clear the data, but keep the correct length of the SSID */
  		*pos++ = hapd->conf->ssid.ssid_len;
  		os_memset(pos, 0, hapd->conf->ssid.ssid_len);
  		pos += hapd->conf->ssid.ssid_len;
  	} else if (hapd->conf->ignore_broadcast_ssid) {
  		*pos++ = 0; /* empty SSID */
  	} else {
  		*pos++ = hapd->conf->ssid.ssid_len;
  		os_memcpy(pos, hapd->conf->ssid.ssid,
  			  hapd->conf->ssid.ssid_len);
  		pos += hapd->conf->ssid.ssid_len;
  	}
  
  	/* Supported rates */
  	pos = hostapd_eid_supp_rates(hapd, pos);
  
  	/* DS Params */
  	pos = hostapd_eid_ds_params(hapd, pos);
  
  	head_len = pos - (u8 *) head;
  
  	tailpos = hostapd_eid_country(hapd, tailpos,
  				      tail + BEACON_TAIL_BUF_SIZE - tailpos);
  
  	/* ERP Information element */
  	tailpos = hostapd_eid_erp_info(hapd, tailpos);
  
  	/* Extended supported rates */
  	tailpos = hostapd_eid_ext_supp_rates(hapd, tailpos);
  
  	/* RSN, MDIE, WPA */
  	tailpos = hostapd_eid_wpa(hapd, tailpos, tail + BEACON_TAIL_BUF_SIZE -
  				  tailpos);
  
  #ifdef CONFIG_IEEE80211N
  	tailpos = hostapd_eid_ht_capabilities(hapd, tailpos);
  	tailpos = hostapd_eid_ht_operation(hapd, tailpos);
  #endif /* CONFIG_IEEE80211N */
  
  	tailpos = hostapd_eid_ext_capab(hapd, tailpos);
  
  	/*
  	 * TODO: Time Advertisement element should only be included in some
  	 * DTIM Beacon frames.
  	 */
  	tailpos = hostapd_eid_time_adv(hapd, tailpos);
  
  	tailpos = hostapd_eid_interworking(hapd, tailpos);
  	tailpos = hostapd_eid_adv_proto(hapd, tailpos);
  	tailpos = hostapd_eid_roaming_consortium(hapd, tailpos);
  
  #ifdef CONFIG_IEEE80211AC
  	tailpos = hostapd_eid_vht_capabilities(hapd, tailpos);
  	tailpos = hostapd_eid_vht_operation(hapd, tailpos);
  #endif /* CONFIG_IEEE80211AC */
  
  	/* Wi-Fi Alliance WMM */
  	tailpos = hostapd_eid_wmm(hapd, tailpos);
  
  #ifdef CONFIG_WPS
  	if (hapd->conf->wps_state && hapd->wps_beacon_ie) {
  		os_memcpy(tailpos, wpabuf_head(hapd->wps_beacon_ie),
  			  wpabuf_len(hapd->wps_beacon_ie));
  		tailpos += wpabuf_len(hapd->wps_beacon_ie);
  	}
  #endif /* CONFIG_WPS */
  
  #ifdef CONFIG_P2P
  	if ((hapd->conf->p2p & P2P_ENABLED) && hapd->p2p_beacon_ie) {
  		os_memcpy(tailpos, wpabuf_head(hapd->p2p_beacon_ie),
  			  wpabuf_len(hapd->p2p_beacon_ie));
  		tailpos += wpabuf_len(hapd->p2p_beacon_ie);
  	}
  #endif /* CONFIG_P2P */
  #ifdef CONFIG_P2P_MANAGER
  	if ((hapd->conf->p2p & (P2P_MANAGE | P2P_ENABLED | P2P_GROUP_OWNER)) ==
  	    P2P_MANAGE)
  		tailpos = hostapd_eid_p2p_manage(hapd, tailpos);
  #endif /* CONFIG_P2P_MANAGER */
  
  	tail_len = tailpos > tail ? tailpos - tail : 0;
  
  	resp = hostapd_probe_resp_offloads(hapd, &resp_len);
  #endif /* NEED_AP_MLME */
  
  	os_memset(&params, 0, sizeof(params));
  	params.head = (u8 *) head;
  	params.head_len = head_len;
  	params.tail = tail;
  	params.tail_len = tail_len;
  	params.proberesp = resp;
  	params.proberesp_len = resp_len;
  	params.dtim_period = hapd->conf->dtim_period;
  	params.beacon_int = hapd->iconf->beacon_int;
  	params.basic_rates = hapd->iconf->basic_rates;
  	params.ssid = (u8 *) hapd->conf->ssid.ssid;
  	params.ssid_len = hapd->conf->ssid.ssid_len;
  	params.pairwise_ciphers = hapd->conf->rsn_pairwise ?
  		hapd->conf->rsn_pairwise : hapd->conf->wpa_pairwise;
  	params.group_cipher = hapd->conf->wpa_group;
  	params.key_mgmt_suites = hapd->conf->wpa_key_mgmt;
  	params.auth_algs = hapd->conf->auth_algs;
  	params.wpa_version = hapd->conf->wpa;
  	params.privacy = hapd->conf->ssid.wep.keys_set || hapd->conf->wpa ||
  		(hapd->conf->ieee802_1x &&
  		 (hapd->conf->default_wep_key_len ||
  		  hapd->conf->individual_wep_key_len));
  	switch (hapd->conf->ignore_broadcast_ssid) {
  	case 0:
  		params.hide_ssid = NO_SSID_HIDING;
  		break;
  	case 1:
  		params.hide_ssid = HIDDEN_SSID_ZERO_LEN;
  		break;
  	case 2:
  		params.hide_ssid = HIDDEN_SSID_ZERO_CONTENTS;
  		break;
  	}
  	hostapd_build_ap_extra_ies(hapd, &beacon, &proberesp, &assocresp);
  	params.beacon_ies = beacon;
  	params.proberesp_ies = proberesp;
  	params.assocresp_ies = assocresp;
  	params.isolate = hapd->conf->isolate;
  #ifdef NEED_AP_MLME
  	params.cts_protect = !!(ieee802_11_erp_info(hapd) &
  				ERP_INFO_USE_PROTECTION);
  	params.preamble = hapd->iface->num_sta_no_short_preamble == 0 &&
  		hapd->iconf->preamble == SHORT_PREAMBLE;
  	if (hapd->iface->current_mode &&
  	    hapd->iface->current_mode->mode == HOSTAPD_MODE_IEEE80211G)
  		params.short_slot_time =
  			hapd->iface->num_sta_no_short_slot_time > 0 ? 0 : 1;
  	else
  		params.short_slot_time = -1;
  	if (!hapd->iconf->ieee80211n || hapd->conf->disable_11n)
  		params.ht_opmode = -1;
  	else
  		params.ht_opmode = hapd->iface->ht_op_mode;
  #endif /* NEED_AP_MLME */
  	params.interworking = hapd->conf->interworking;
  	if (hapd->conf->interworking &&
  	    !is_zero_ether_addr(hapd->conf->hessid))
  		params.hessid = hapd->conf->hessid;
  	params.access_network_type = hapd->conf->access_network_type;
  	params.ap_max_inactivity = hapd->conf->ap_max_inactivity;
  	if (hostapd_drv_set_ap(hapd, &params))
  		wpa_printf(MSG_ERROR, "Failed to set beacon parameters");
  	hostapd_free_ap_extra_ies(hapd, beacon, proberesp, assocresp);
  
  	os_free(tail);
  	os_free(head);
  	os_free(resp);
  }
  
  
  void ieee802_11_set_beacons(struct hostapd_iface *iface)
  {
  	size_t i;
  	for (i = 0; i < iface->num_bss; i++)
  		ieee802_11_set_beacon(iface->bss[i]);
  }
  
  
  /* only update beacons if started */
  void ieee802_11_update_beacons(struct hostapd_iface *iface)
  {
  	size_t i;
  	for (i = 0; i < iface->num_bss; i++)
  		if (iface->bss[i]->beacon_set_done)
  			ieee802_11_set_beacon(iface->bss[i]);
  }
  
  #endif /* CONFIG_NATIVE_WINDOWS */
  