/*
 *
 * 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_pop3(lpi_data_t *data, lpi_module_t *mod UNUSED) {

	//if (match_chars_either(data, '+', 'O', 'K', ANY))
	//	return true;
	if (MATCH(data->payload[0], '+', 'O', 'K', ANY) && data->payload_len[0] > 8) // at least "+OK n n\r" 
        return true;
    if (MATCH(data->payload[1],'+', 'O', 'K', ANY) && data->payload_len[1] > 8)
                return true;
	if (match_chars_either(data, '-', 'E', 'R', 'R'))
		return true;

	if (match_str_either(data, "CAPA")) {
		if (data->payload_len[0] == 0)
			return true;
		if (data->payload_len[1] == 0)
			return true;
	}

	if (match_str_either(data, "AUTH")) {
		if (data->payload_len[0] == 0)
			return true;
		if (data->payload_len[1] == 0)
			return true;
	}
	if(data->server_port==110 || data->client_port==110)
	{
		if (match_str_either(data, "USER") ||
			match_str_either(data, "user") ||
			match_str_either(data, "QUIT") ||
			match_str_either(data, "quit") ||
			match_str_either(data, "LIST") ||
			match_str_either(data, "list"))
		{
			return true;
		}
	}
	
	return false;
}

static lpi_module_t lpi_pop3 = {
	LPI_PROTO_POP3,
	LPI_CATEGORY_MAIL,
	"POP3",
	2,
	match_pop3
};

void register_pop3(LPIModuleMap *mod_map) {
	register_protocol(&lpi_pop3, mod_map);
}