Server program
#include<stdio.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>
int
main()
{
int sd,sd1,i,clilen,len,sport;
struct sockaddr_in ser,cli;
char smsg[20],rmsg[20];
printf("\n\t
Enter the Port : ");
scanf("%d",&sport);
if((sd=socket(AF_INET,SOCK_STREAM,0))<0)
{
printf("\n\t Error in socket");
return 0;
}
bzero(&ser,sizeof(ser));
ser.sin_family=AF_INET;
ser.sin_port=htons(sport);
ser.sin_addr.s_addr=htonl(INADDR_ANY);
if(bind(sd,(struct
sockaddr*)&ser,sizeof(ser)) <0)
{
printf("\n\t Error in bind");
return 0;
}
if(listen(sd,5)
<0)
{
printf("\n\t Error in Listen");
return 0;
}
do
{
printf("\n\t
Enter the client no to be communicate : ");
scanf("%d",&i);
if(i==0)
exit(0);
printf("\n\t
Client %d is connected",i);
clilen=sizeof(cli);
if((sd1=accept(sd,(struct
sockaddr*)&cli,&clilen)) <0)
{
printf("\n\t Error in Accept");
return 0;
}
printf("\n\t Accepted ");
do
{
recv(sd1,rmsg,20,0);
printf("\n\t Clinet Msg Received : %s
",rmsg);
printf("\n\t Enter Server String :
");
scanf("%s",smsg);
send(sd1,smsg,20,0);
wait(20);
} while((strcmp(smsg,"exit"))!=0);
}
while(i!=0);
close(sd);
}
Client :1 program
#include<stdio.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>
int
main()
{
int
sd,len,cport;
struct
sockaddr_in ser;
char
smsg[20],rmsg[20];
printf("\n\t
Enter the Port : ");
scanf("%d",&cport);
if((sd=socket(AF_INET,SOCK_STREAM,0))<0)
{
printf("\n\t Error in socket");
return 0;
}
bzero(&ser,sizeof(ser));
ser.sin_family=AF_INET;
ser.sin_port=htons(cport);
ser.sin_addr.s_addr=htonl(INADDR_ANY);
if(connect(sd,(struct
sockaddr*)&ser,sizeof(ser)) <0)
{
printf("\n\t Error in connect");
exit(-1);
}
do
{
printf("\n\t Enter the Client String
:");
scanf("%s",smsg);
send(sd,smsg,20,0);
wait(20);
recv(sd,rmsg,20,0);
printf("\n\t Server Msg Received : %s ",rmsg);
}
while((strcmp(rmsg,"exit"))!=0);
close(sd);
}
Client :2 program
#include<stdio.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdlib.h>
int
main()
{
int
sd,len,cport;
struct
sockaddr_in ser;
char
smsg[20],rmsg[20];
printf("\n\t
Enter the Port : ");
scanf("%d",&cport);
if((sd=socket(AF_INET,SOCK_STREAM,0))<0)
{
printf("\n\t Error in socket");
return 0;
}
bzero(&ser,sizeof(ser));
ser.sin_family=AF_INET;
ser.sin_port=htons(cport);
ser.sin_addr.s_addr=htonl(INADDR_ANY);
if(connect(sd,(struct
sockaddr*)&ser,sizeof(ser)) <0)
{
printf("\n\t Error in connect");
exit(-1);
}
do
{
printf("\n\t Enter the Client String
:");
scanf("%s",smsg);
send(sd,smsg,20,0);
wait(20);
recv(sd,rmsg,20,0);
printf("\n\t Server Msg Received : %s ",rmsg);
}
while((strcmp(rmsg,"exit"))!=0);
close(sd);
}
OUTPUT
SERVER
[11ca013@mcalinux
network]$ cc 15mulser.c
[11ca013@mcalinux
network]$ ./a.out
Enter the Port : 3326
Enter the client no to be communicate
: 1
Client 1 is connected
Accepted
Clinet Msg Received : hi
Enter Server String : how_are_you
Clinet Msg Received : i_am_fine
Enter Server String : exit
Enter the client no to be communicate
: 2
Client 2 is connected
Accepted
Clinet Msg Received : hi
Enter Server String : how_are_you
Clinet Msg Received : i_am_boss
Enter Server String : exit
Enter the client no to be communicate
: 0
[11ca013@mcalinux
network]$
CLIENT:1
[11ca013@mcalinux
network]$ cc 15mulcli1.c
[11ca013@mcalinux
network]$ ./a.out
Enter the Port : 3326
Enter the Client String :hi
Server Msg Received : how_are_you
Enter the Client String :i_am_fine
Server Msg Received : exit
CLIENT:2
[11ca013@mcalinux
network]$ cc 15mulcli2.c
[11ca013@mcalinux
network]$ ./a.out
Enter the Port : 3326
Enter the Client String :hi
Server Msg Received : how_are_you
Enter the Client String :i_am_boss
Server Msg Received : exit
