Unrestricted Simplex Protocol- Protocol 1

[ HEADER.H ]

#include<stdio.h>

#include<fcntl.h>

#include<string.h>

typedef struct 

{

int seqno;

int ackno;

char data[50];

}frame;

void from_network_layer(char buffer[])

{

printf("Enter Data : ");

scanf("%s",buffer);

}

void to_physical_layer(int pid1,frame *f)

{

write(pid1,f,sizeof(frame));

}

void from_physical_layer(int pid1,frame *f)

{

read(pid1,f,sizeof(frame));

}

void to_network_layer(char buffer[])

{

printf("\n%s",buffer);

}

[ SENDER SIDE ]

#include<stdio.h>
#include<fcntl.h>
#include<string.h>
#include "header.h"
void main()
{
int pid1,i,no;
char buffer[50];
frame f;
system(">pipe1");
pid1=open("pipe1",O_WRONLY);
printf("Enter NUMBER OF DATA : ");
scanf("%d",&no);
write(pid1,&no,sizeof(no));
for(i=0;i<no;i++)
{
from_network_layer(buffer);
strcpy(f.data,buffer);
to_physical_layer(pid1,&f);
}
close(pid1);
}

[ RECEIVER SIDE ]

#include<stdio.h>
#include<fcntl.h>
#include<string.h>
#include "header.h"
void main()
{
int pid1,no,i;
char buffer[50];
frame f;
pid1=open("pipe1",O_RDONLY);
read(pid1,&no,sizeof(no));
printf("DATA RECEIVED : %d",no);
printf("\nDATA");
for(i=0;i<no;i++)
{
from_physical_layer(pid1,&f);
strcpy(buffer,f.data);
to_network_layer(buffer);
}
close(pid1);
unlink("pipe1");
}