pong-module.h

development of enhancement

/*
 * Copyright (c) 2008, Karlstad University
 * Erik Andersson, Emil Ljungdahl, Lars-Olof Moilanen
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the <organization> nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: pong-module.h 2 2008-06-04 10:05:48Z emil $
 */

#ifndef PONG_MODULE_H
#define PONG_MODULE_H

#include <module.h>
#include <mac.h>

#define PONG_DROP_REASON_UNKNOWN_TYPE "UKT"

#define HDR_PONG(P)	(hdr_pong::access(P))

extern packet_t PT_MPONG;

typedef struct hdr_pong {
	char ret;
	double send_time;
	double rcv_time;
	int seq;

	static int offset_;
	inline static int& offset() { return offset_; }
	inline static hdr_pong* access(const Packet* p) {
		return (hdr_pong*) p->access(offset_);
	}
} hdr_pong;


class PongModule : public Module {
	public:
		PongModule();
		~PongModule();
		virtual int command(int argc, const char*const* argv);
		virtual void recv(Packet* p);
		virtual void recv(Packet* p, Handler* h);
		void sendPkt(nsaddr_t addr);
		void initPkt(Packet* p);
		void initRetPkt(Packet* p, double send_time, int seq);
	protected:
		int seq;
		int oneway;
		int size_;
		static int uidcnt_;
		double rtt;
};

#endif