// Copyright (c) 2000 by the University of Southern California
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// $Header: /nfs/jade/vint/CVSROOT/ns-2/apps/ping.h,v 1.3 2000/09/01 03:04:06 haoboy Exp $

/*
 * File: Header File for a new 'Ping' Agent Class for the ns
 *       network simulator
 * Author: Marc Greis (greis@cs.uni-bonn.de), May 1998
 *
 * IMPORTANT: Incase of any changes made to this file ,
 * tutorial/examples/ping.h  (used in Greis' tutorial) should
 * be updated as well.
 */


#ifndef ns_ping_h
#define ns_ping_h

#include "agent.h"
#include "tclcl.h"
#include "packet.h"
#include "address.h"
#include "ip.h"

struct hdr_ping {
	char ret;
	double send_time;

	// Header access methods
	static int offset_; // required by PacketHeaderManager
	inline static int& offset() { return offset_; }
	inline static hdr_ping* access(const Packet* p) {
		return (hdr_ping*) p->access(offset_);
	}
};

class PingAgent : public Agent {
public:
	PingAgent();
	virtual int command(int argc, const char*const* argv);
	virtual void recv(Packet*, Handler*);
};

#endif // ns_ping_h