// C++/CSIM Model of generating synthetic trace file
// Two classes of traffic: A and B
// Interarrival time of Class A is exponentially distributed
//              with mean 10.0
//      flow of class A will generate N_a pkts (uniformly distributed
//              between (100 to 500) with inter-packet time being
//              exponentially distributed with mean of 2.0)
// Interarrival time of Class B is exponentially distributed
//              with mean 20.0
//      flow of class B will generate N_b pkts (uniformly distributed
//              between (400 to 800) with inter-packet time being
//              exponentially distributed with mean of 1.0)

// Traffic generation time is T = 1000.0


#include "cpp.h"			// class definitions

#define T 1000.0
#define TA_IAR_TM 10.0
#define TB_IAR_TM 20.0
#define PA_IAR_TM 2.0
#define PB_IAR_TM 1.0
#define N_a_min   100.0
#define N_a_max   500.0
#define N_b_min   400.0
#define N_b_max   800.0

void generate_traffic_A();
void generate_traffic_B();
void generate_flow_A(int i);
void generate_flow_B(int i);


extern "C" void sim(int, char **);

void sim(int argc, char *argv[])
{
	set_model_name("Synthetic Workload");
	create("sim");

	generate_traffic_A();
	generate_traffic_B();

	hold(T);
}


void generate_traffic_A()
{
        int i;

	create("traffic A");
	i = 0;
        while(1){
           //hold(expntl(TA_IAR_TM));
           hold(5.0);
           generate_flow_A(i);
           i++;
        } 
}

void generate_traffic_B()
{
	int i;

        create("traffic B");
	i = 0;
        while(1){
           //hold(expntl(TB_IAR_TM));
           hold(8.0);
           generate_flow_B(i);
 	   i++;
        }
}



void generate_flow_A(int i)
{

	double  total_pkts, num;

	create("flow A");

	// total # of packets to generate for this flow A
        total_pkts = uniform(N_a_min, N_a_max);

	for (num=0; num < total_pkts; num+=1.0){
	    hold(expntl(PA_IAR_TM));
              printf("flow A: flow id %6d: pkt number=%6.1f: time=%.2lf\n", 
                      i, num, clock);
        }
}

void generate_flow_B(int i)
{

        double  total_pkts, num;

	create("flow B");
        // total # of packets to generate for this flow B
        total_pkts = uniform(N_b_min, N_b_max);

        for (num=0; num < total_pkts; num+=1.0){
            hold(expntl(PB_IAR_TM));
            printf("flow B: flow id %6d: pkt number=%6.1f: time=%.2lf\n", 
                    i, num, clock);
        }
}