Simulate and implement stop and wait protocol for noisy channel in Computer Network -KML Tutorial

 Aim:- Simulate and implement stop and wait protocol for noisy channel.

Program:-

1. #include<stdio.h>
2. #include<stdlib.h>
3. #include<time.h>
4. int main(){
5.     int n,i=0,sn=0,rn=0,proba=0;
6.     srand(time(0));
7.     printf("Enter the number of frames:");
8.     scanf("%d",&n);
9.     while(i<n){
10.         sn=i%2;
11.         printf("Sender: sending frame no. %d with sequence number %d\n",i,sn);
12.         proba=rand()%100;
13.         if(proba>80){
14.             printf("****Frame is corrupted****\n");
15.         }else{
16.             if(sn==rn){
17.                 rn=(rn+1)%2;
18.                 printf("Receiver: sending acknowledgment No. %d\n",rn);
19.                 proba=rand()%100;
20.                 if(proba>80){
21.                     printf("****Acknowledgment frame corrupted****\n");
22.                 }else{
23.                     i++;
24.                 }
25.             }else{
26.                 printf("Receiver: sending acknowledgment No. %d\n",rn);
27.                 proba=rand()%100;
28.                 if(proba>80){
29.                     printf("**Acknowledgment frame corrupted**\n");
30.                 }else{
31.                     i++;
32.                 }
33.             }
34.         }
35.     }
36.     return 0;
37. }

Outpute:-

Enter the number of frames:5
Sender: sending frame no. 0 with sequence number 0
Receiver: sending acknowledgment No. 1
Sender: sending frame no. 1 with sequence number 1
****Frame is corrupted****
Sender: sending frame no. 1 with sequence number 1
Receiver: sending acknowledgment No. 0
Sender: sending frame no. 2 with sequence number 0
Receiver: sending acknowledgment No. 1
Sender: sending frame no. 3 with sequence number 1
Receiver: sending acknowledgment No. 0
Sender: sending frame no. 4 with sequence number 0
Receiver: sending acknowledgment No. 1