Program to Simulate Stop and Wait Protocol for Noisy Channel.
Simulate and Implement Stop and Wait Protocol for Noisy Channel Program Using C++.
Program:
- C++
- C
- Java
- Python
- C#
- PHP
- Javascript
/*----------------------------------------------------------------------
Program to Simulate Stop and Wait Protocol for Noisy Channel Using C++
-----------------------------------------------------------------------*/
#include<iostream>
#include<stdlib.h>
#include<conio.h>
#include<time.h>
#include<windows.h>
#define inc(k) k=(k+1)%2;
using namespace std;
typedef struct
{
int data;
}packet;
typedef struct
{
int seq;
int ack;
packet *info;
}frame;
int event;
int flag = 0;
int success;
int temp = -1;
frame s;
packet buffer;
int k=0;
void from_network_layer(packet *p)
{
s.info = p;
s.seq = inc(k);
}
void to_physical_layer(frame *f)
{
cout<<"\n\t\tData : "<<f->info->data;
cout<<"\n\t\tSeq no. : "<<f->seq;
cout<<"\n\t\tFrame sent.";
}
void from_physical_layer(frame *f)
{
cout<<"\n\n\nRECEIVER : \tFrame received.";
cout<<"\n\t\tData : "<<f->info->data;
cout<<"\n\t\tSeq no. : "<<f->seq;
s.ack = (s.seq+1)%2;
}
void to_network_layer(packet *p)
{
p = s.info;
}
void sender()
{
if(flag==0)
{
from_network_layer(&buffer);
cout<<"\n\n\nSENDER : \tSending Frame...";
to_physical_layer(&s);
}
else if (flag==1)
{
cout<<"\n\n\nSENDER : \tTimeout!!! No Acknowledgement received."<<"\n\n\t\tResending Frame...";
to_physical_layer(&s);
}
else
{
cout<<"\n\n\nSENDER : \tACK "<<s.ack<<" received successfully.";
success = 1;
temp = -1;
flag = 0;
}
}
void receiver()
{
event = rand()%4;
cout<<"\n<Event "<<event<<">\n";
if(event==0)
{
if (temp==s.ack)
cout<<"\n\n\nRECEIVER : \tDuplicate Frame Detected (FRAME DISCARDED)";
else
{
from_physical_layer(&s);
to_network_layer(&buffer);
}
cout<<"\n\n\t\tACK "<<s.ack<<" sent.";
flag = 2;
}
else if (event==1 || event==2)
{
flag = 1;
}
else
{
if (temp==s.ack)
cout<<"\n\n\nRECEIVER : \tDuplicate Frame Detected (FRAME DISCARDED)";
else
{
from_physical_layer(&s);
to_network_layer(&buffer);
temp = s.ack;
}
cout<<"\n\n\t\tACK "<<s.ack<<" sent.";
flag = 1;
}
getch();
}
int main()
{
char ans ='y';
srand(time(NULL));
cout<<"\nEnter data : ";
cin>>buffer.data;
do
{
success = 0;
sender();
Sleep(3000);
if(!success)
receiver();
else
{
cout<<"\n\n\nDo you want to continue (y/n) : ";
cin>>ans;
if(ans=='y')
{
cout<<"\nEnter data : ";
cin>>buffer.data;
}
}
}while(ans=='y');
return 0;
} |
Output
Enter data : 10010
SENDER : Sending Frame...
Data : 10010
Seq no. : 1
Frame sent.
<Event 3>
RECEIVER : Frame received.
Data : 10010
Seq no. : 1
ACK 0 sent.
SENDER : Timeout!!! No Acknowledgement received.
Resending Frame...
Data : 10010
Seq no. : 1
Frame sent.
<Event 1>
SENDER : Timeout!!! No Acknowledgement received.
Resending Frame...
Data : 10010
Seq no. : 1
Frame sent.
<Event 1>
SENDER : Timeout!!! No Acknowledgement received.
Resending Frame...
Data : 10010
Seq no. : 1
Frame sent.
<Event 0>
RECEIVER : Duplicate Frame Detected (FRAME DISCARDED)
ACK 0 sent.
SENDER : ACK 0 received successfully.
Do you want to continue (y/n) :
