SIMULATON OF SLIDING WINDOW PROTOCOL

SERVER SIDE:

#include<stdio.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<string.h>

int main(int argc,char **argv)

{

int len;

int listenfd,connfd,n;

struct sockaddr_in servaddr,cliaddr;

char b[1024];

char c[1000];

listenfd=socket(AF_INET,SOCK_STREAM,0);

if(listenfd<0)

perror("cannot create socket");

bzero(&servaddr,sizeof(servaddr));

servaddr.sin_family=AF_INET;

servaddr.sin_addr.s_addr=inet_addr("20.30.1.211");

servaddr.sin_port=htons(20064);

bind(listenfd,(struct sockaddr*)&servaddr,sizeof(servaddr));

listen(listenfd,5);

len=sizeof(cliaddr);

connfd=accept(listenfd,(struct sockaddr*)&cliaddr,&len);

if(connfd>0)

printf("\n connection established");

do

{

n=read(connfd,b,1024);

printf("\n reeive data %s",b);

printf("\n your acknowledgement[yes=1,no=0]:");

scanf("%s",c);

n=write(connfd,c,1024);

}while(1);

close(connfd);

close(listenfd);

return 0;

}

CLIENT SIDE:

#include<stdio.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<string.h>

int main(int arg,char **argv)

{

int len;

int sockfd,n,m,p;

struct sockaddr_in servaddr,cliaddr;

char buff[1024];

char buff1[1000];

char str[1000];

char d[10]={'a','b','c','d','e','f','g','h','i','j'};

int count[10],ack[10];

int i,j,k;

for(k=0;k<10;k++)

{

count[k]=0;

ack[k]=0;

}