Iterative Connection Oriented Server in Computer Networks

Computer Network Lab Manual / Iterative Connection Oriented Server in Computer Networks

Program Name

Write a C Program for Iterative Connection Oriented Server in Computer Networks.

Theory


Server	Compiling	cc s.c -o sobj
Server  Running	    ./ sobj &
Client	Compiling	cc c.c
Client	Running	./a.out

Program Code


//vi s.c (server progrm)
// Iterative Connection Oriented Server Code Using Port No 7

#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<stdlib.h>
main()
{
int sockfd,nsockfd,j,clilen;
char msg[20];
struct sockaddr_in sa,ca;
sockfd=socket(AF_INET,SOCK_STREAM,0);
if(sockfd<0)
{
perror("socket not created");
exit(0);
}
sa.sin_family=AF_INET;
sa.sin_port=htons(6127);
sa.sin_addr.s_addr=inet_addr("10.2.0.7");
j=bind(sockfd,(struct sockaddr *)&sa,sizeof(sa));
if(j<0)
{
perror("bind error");
exit(0);
}
printf("%d\n",j);
listen(sockfd,5);
while(1)
{
clilen=sizeof(ca);
nsockfd=accept(sockfd,(struct sockaddr*)&ca,&clilen);
recv(nsockfd,msg,sizeof(msg),0);
send(nsockfd,msg,sizeof(msg),0);
printf("the message received is %s",msg);
}
close(nsockfd);
close(sockfd);
}



//vi c.c (Client progrm)
// Iterative Connection Oriented Client Code Using Port No 7

#include<sys/types.h>
#include<sys/socket.h>
#include<unistd.h>
#include<stdio.h>
#include<arpa/inet.h>
#include<stdlib.h>
#include<netinet/in.h>
main()
{
int sockfd,j;
struct sockaddr_in sa;
char msg[20],msg1[20];
sockfd=socket(AF_INET,SOCK_STREAM,0);
if(sockfd<0)
{
 perror("socket not created");
 exit(0);
}
sa.sin_family=AF_INET;
sa.sin_port=htons(7);
sa.sin_addr.s_addr=inet_addr("10.2.0.7");
j=connect(sockfd,(struct sockaddr *)&sa,sizeof(sa));
if(j<0)
{ 
 perror("connection not created");
 exit(0);
}
printf("enter a message \n");
scanf("%s",msg);
send(sockfd,msg,20,0);
recv(sockfd,msg1,20,0);
printf("message is %s",msg1);
close(sockfd);
}

Input:
enter a message 
hello

Output:
message is hello

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