/**************************************************************************************
* *Copyright (c) 2006 Regents of the University of Chang Gung 						*
* *All rights reserved.													* *																* * Redistribution and use in source and binary forms, with or without						* * modification, are permitted provided that the following conditions					* * are met: 															* * 1. Redistributions of source code must retain the above copyright						* *    notice, this list of conditions and the following disclaimer.						* * 2. 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.					* * 3. All advertising materials mentioning features or use of this software					* *    must display the following acknowledgement:									* *	This product includes software developed by the Computer Systems					* *	Engineering Group at Lawrence Berkeley Laboratory.							* * 4. Neither the name of the University nor of the Laboratory may be used					* *    to endorse or promote products derived from this software without					* *    specific prior written permission.										* *5. If you have any problem about these codes, 									*       please mail to antibanish@gmail.com or b9229008@stmail.cgu.edu.tw                    			*
**************************************************************************************/#include <stdlib.h> #include "random.h"#include "trafgen.h"#include "ranvar.h"/*  * Constant bit rate traffic source.   Parameterized by interval, (optional) * random noise in the interval, and packet size.   */class UGS_Traffic : public TrafficGenerator { public:	UGS_Traffic();	virtual double next_interval(int&);	//HACK so that udp agent knows interpacket arrival time within a burst	inline double interval() { return (interval_); } protected:	virtual void start();	void init();	double rate_;     /* send rate during on time (bps) */	double interval_; /* packet inter-arrival time during burst (sec) */	double random_;	int seqno_;	int maxpkts_;};static class UGSTrafficClass : public TclClass { public:	UGSTrafficClass() : TclClass("Application/Traffic/UGS") {}	TclObject* create(int, const char*const*) {		return (new UGS_Traffic());	}} class_UGS_Traffic;UGS_Traffic::UGS_Traffic() : seqno_(0){	//bind_bw("rate_", &rate_);	//bind("random_", &random_);	//bind("packetSize_", &size_);
	rate_=448000;
	random_=0;
	size_=210;
	maxpkts_=268435456;}void UGS_Traffic::init(){        // compute inter-packet interval 	interval_ = (double)(size_ << 3)/(double)rate_;	if (agent_)		if (agent_->get_pkttype() != PT_TCP && 		    agent_->get_pkttype() != PT_TFRC)			//Setting packet type to UGS.			agent_->set_pkttype(PT_UGS);}void UGS_Traffic::start(){        init();        running_ = 1;        timeout();}double UGS_Traffic::next_interval(int& size){
	//printf("double UGS_Traffic::next_interval(int& size) \n");	// Recompute interval in case rate_ or size_ has changes	interval_ = (double)(size_ << 3)/(double)rate_;	double t = interval_;	if (random_)		t += interval_ * Random::uniform(-0.5, 0.5);	//UGS service using constant bit rate packet.		size = size_;	//printf("---------- UGS traffic t : %f \t",t);	//printf("size : %d ----------\n",size);	if (++seqno_ < maxpkts_)		return(t);	else		return(-1); }