/*
 * hostapd / IEEE 802.11ax HE
 * Copyright (c) 2016-2017, Qualcomm Atheros, Inc.
 *
 * 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 "common/ieee802_11_defs.h"
#include "hostapd.h"
#include "ap_config.h"
#include "beacon.h"
#include "ieee802_11.h"
#include "dfs.h"

u8 * hostapd_eid_he_capab(struct hostapd_data *hapd, u8 *eid)
{
	struct ieee80211_he_capabilities *cap;
	u8 *pos = eid;

	if (!hapd->iface->current_mode)
		return eid;

	*pos++ = WLAN_EID_EXTENSION;
	*pos++ = 1 + sizeof(struct ieee80211_he_capabilities);
	*pos++ = WLAN_EID_EXT_HE_CAPABILITIES;

	cap = (struct ieee80211_he_capabilities *) pos;
	os_memset(cap, 0, sizeof(*cap));

	if (hapd->iface->conf->he_phy_capab.he_su_beamformer)
		cap->he_phy_capab_info[HE_PHYCAP_SU_BEAMFORMER_CAPAB_IDX] |=
			HE_PHYCAP_SU_BEAMFORMER_CAPAB;

	if (hapd->iface->conf->he_phy_capab.he_su_beamformee)
		cap->he_phy_capab_info[HE_PHYCAP_SU_BEAMFORMEE_CAPAB_IDX] |=
			HE_PHYCAP_SU_BEAMFORMEE_CAPAB;

	if (hapd->iface->conf->he_phy_capab.he_mu_beamformer)
		cap->he_phy_capab_info[HE_PHYCAP_MU_BEAMFORMER_CAPAB_IDX] |=
			HE_PHYCAP_MU_BEAMFORMER_CAPAB;

	pos += sizeof(*cap);

	return pos;
}


u8 * hostapd_eid_he_operation(struct hostapd_data *hapd, u8 *eid)
{
	struct ieee80211_he_operation *oper;
	u8 *pos = eid;

	if (!hapd->iface->current_mode)
		return eid;

	*pos++ = WLAN_EID_EXTENSION;
	*pos++ = 1 + sizeof(struct ieee80211_he_operation);
	*pos++ = WLAN_EID_EXT_HE_OPERATION;

	oper = (struct ieee80211_he_operation *) pos;
	os_memset(oper, 0, sizeof(*oper));

	if (hapd->iface->conf->he_op.he_bss_color)
		oper->he_oper_params |= hapd->iface->conf->he_op.he_bss_color;

	if (hapd->iface->conf->he_op.he_default_pe_duration)
		oper->he_oper_params |=
			(hapd->iface->conf->he_op.he_default_pe_duration <<
			 HE_OPERATION_DFLT_PE_DURATION_OFFSET);

	if (hapd->iface->conf->he_op.he_twt_required)
		oper->he_oper_params |= HE_OPERATION_TWT_REQUIRED;

	if (hapd->iface->conf->he_op.he_rts_threshold)
		oper->he_oper_params |=
			(hapd->iface->conf->he_op.he_rts_threshold <<
			 HE_OPERATION_RTS_THRESHOLD_OFFSET);

	/* TODO: conditional MaxBSSID Indicator subfield */

	pos += sizeof(*oper);

	return pos;
}


u8 * hostapd_eid_he_mu_edca_parameter_set(struct hostapd_data *hapd, u8 *eid)
{
	struct ieee80211_he_mu_edca_parameter_set *edca;
	u8 *pos;
	size_t i;

	pos = (u8 *) &hapd->iface->conf->he_mu_edca;
	for (i = 0; i < sizeof(*edca); i++) {
		if (pos[i])
			break;
	}
	if (i == sizeof(*edca))
		return eid; /* no MU EDCA Parameters configured */

	pos = eid;
	*pos++ = WLAN_EID_EXTENSION;
	*pos++ = 1 + sizeof(*edca);
	*pos++ = WLAN_EID_EXT_HE_MU_EDCA_PARAMS;

	edca = (struct ieee80211_he_mu_edca_parameter_set *) pos;
	os_memcpy(edca, &hapd->iface->conf->he_mu_edca, sizeof(*edca));

	wpa_hexdump(MSG_DEBUG, "HE: MU EDCA Parameter Set element",
		    pos, sizeof(*edca));

	pos += sizeof(*edca);

	return pos;
}