/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 2005,2006 INRIA
 * All rights reserved.
 *
 * 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;
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
 */

#ifndef PCAP_WRITER_H
#define PCAP_WRITER_H

#include "yans/callback.h"
#include <stdint.h>
#include "packet.h"

namespace yans {

class SystemFile;

/**
 * \brief Pcap output for Packet logger
 *
 * Log Packets to a file in pcap format which can be
 * read by pcap readers.
 */
class PcapWriter {
public:
	PcapWriter ();
	~PcapWriter ();

	/**
	 * \param name the name of the file to store packet log into.
	 * This method creates the file if it does not exist. If it
	 * exists, the file is emptied.
	 */
	void open (char const *name);

	/**
	 * Write a pcap header in the output file which specifies
	 * that the content of the file will Packets with
	 * Ethernet/LLC/SNAP encapsulation.
	 */
	void write_header_ethernet (void);

	/**
	 * \param packet packet to write to output file
	 */
	void write_packet (Packet const packet);

private:
	void write_data (uint8_t *buffer, uint32_t size);
	void write_32 (uint32_t data);
	void write_16 (uint16_t data);
	SystemFile *m_writer;
	Callback<void,uint8_t *,uint32_t> m_write_callback;
};

}; // namespace yans

#endif /* PCAP_WRITER_H */