/*
 * ZeroTier One - Network Virtualization Everywhere
 * Copyright (C) 2011-2016  ZeroTier, Inc.  https://www.zerotier.com/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef ZT_FILTER_HPP
#define ZT_FILTER_HPP

#include <stdint.h>

#include "Constants.hpp"
#include "../include/ZeroTierOne.h"

namespace ZeroTier {

class Address;
class RuntimeEnvironment;
class MAC;

/**
 * Network packet filter for rules engine
 */
class Filter
{
public:
	/**
	 * Apply a list of rules to a packet
	 *
	 * This returns the matching TARGET rule entry if there is a match or NULL
	 * if no match is found.
	 *
	 * @param ztSource Source ZeroTier address
	 * @param ztDest Destination ZeroTier address
	 * @param macSource Ethernet layer source address
	 * @param macDest Ethernet layer destination address
	 * @param frameData Ethernet frame data
	 * @param frameLen Ethernet frame payload length
	 * @param etherType 16-bit ethernet type ID
	 * @param vlanId 16-bit VLAN ID
	 * @param rules Pointer to array of rules
	 * @param ruleCount Number of rules
	 * @return Pointer to rules[] to matching TARGET, or NULL if no match
	 */
	static const ZT_VirtualNetworkRule *run(
		const RuntimeEnvironment *RR,
		const Address &ztSource,
		const Address &ztDest,
		const MAC &macSource,
		const MAC &macDest,
		const uint8_t *frameData,
		const unsigned int frameLen,
		const unsigned int etherType,
		const unsigned int vlanId,
		const ZT_VirtualNetworkRule *rules,
		const unsigned int ruleCount);
};

} // namespace ZeroTier

#endif