/*
 *
 * Copyright (c) 2011-2016 The University of Waikato, Hamilton, New Zealand.
 * All rights reserved.
 *
 * This file is part of libprotoident.
 *
 * This code has been developed by the University of Waikato WAND
 * research group. For further information please see http://www.wand.net.nz/
 *
 * libprotoident is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * libprotoident is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 */

#include <string.h>

#include "libprotoident.h"
#include "proto_manager.h"
#include "proto_common.h"

static inline bool match_sc_message(uint32_t payload, uint32_t len) {

        /* http://forum.valhallalegends.com/index.php?topic=17702.0 */

        /* Starcraft header is 16 bytes - most bodies are either one or
         * two bytes */

        if (MATCH(payload, 0x00, 0x00, 0x00, 0x00) && len == 16)
                return true;
        if (MATCH(payload, 0x00, 0x00, 0x00, 0x00) && len == 17)
                return true;
        if (MATCH(payload, 0x00, 0x00, 0x00, 0x00) && len == 18)
                return true;

        /* 34 also seems possible */
        if (MATCH(payload, 0x00, 0x00, 0x00, 0x00) && len == 34)
                return true;


        return false;
}

static inline bool match_sc_remaster_01(uint32_t payload, uint32_t len) {
        /* New protocol that has been implemented as part of the
         * remaster.
         */
	if (len == 0)
		return true;
        if (len < 50 && MATCH(payload, 0x08, 0x01, 0x12, 0x14))
                return true;
        if (len < 50 && MATCH(payload, 0x08, 0x01, 0x12, 0x10))
                return true;
        if (len < 50 && MATCH(payload, 0x08, 0x01, 0x12, 0x11))
                return true;
        return false;

}

static inline bool match_sc_remaster_02(uint32_t payload, uint32_t len) {
        /* New protocol that has been implemented as part of the
         * remaster.
         */
        if (len < 50 && MATCH(payload, 0x08, 0x02, 0x12, 0x18))
                return true;
        return false;

}

static inline bool match_starcraft(lpi_data_t *data, lpi_module_t *mod UNUSED) {

	if (data->server_port != 6112 && data->client_port != 6112)
                return false;

        if (match_sc_remaster_01(data->payload[0], data->payload_len[0])) {
                if (match_sc_remaster_01(data->payload[1], data->payload_len[1]))
                        return true;
                if (match_sc_remaster_02(data->payload[1], data->payload_len[1]))
                        return true;
        }

        if (match_sc_remaster_01(data->payload[1], data->payload_len[1])) {
                if (match_sc_remaster_01(data->payload[0], data->payload_len[0]))
                        return true;
                if (match_sc_remaster_02(data->payload[0], data->payload_len[0]))
                        return true;
        }

        if (!match_sc_message(data->payload[0], data->payload_len[0]))
                return false;
        if (!match_sc_message(data->payload[1], data->payload_len[1]))
                return false;

        return true;
	

}

static lpi_module_t lpi_starcraft = {
	LPI_PROTO_UDP_STARCRAFT,
	LPI_CATEGORY_GAMING,
	"Starcraft",
	4,
	match_starcraft
};

void register_starcraft(LPIModuleMap *mod_map) {
	register_protocol(&lpi_starcraft, mod_map);
}