ECHO APPLICATION USING TCP
By karthick
, in
IMPLEMENTATION OF ECHO APPLICATION USING TCP
,
1 Comment
Server program
#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<errno.h>
int
main()
{
int sock,con,byte_rec,flag=0,port;
char send_data[1024],rec_data[1024];
struct sockaddr_in ser,cli;
int sin_size;
if((sock=socket(AF_INET,SOCK_STREAM,0))==-1)
{
perror("Socket\n");
exit(1);
}
ser.sin_family=AF_INET;
printf("Enter the port number : ");
scanf("%d",&port);
ser.sin_port=htons(port);
ser.sin_addr.s_addr=INADDR_ANY;
bzero(&(ser.sin_zero),8);
if(bind(sock,(struct
sockaddr*)&ser,sizeof(struct sockaddr))==-1)
{
perror("can't
bind\n");
exit(1);
}
if(listen(sock,3)==-1)
{
perror("listen\n");
exit(1);
}
printf("Waiting \n");
sin_size=sizeof(struct sockaddr_in);
con=accept(sock,(struct
sockaddr*)&cli,&sin_size);
printf("Connected\n\n");
while(1)
{
byte_rec=recv(con,rec_data,1024,0);
rec_data[byte_rec]='\0';
printf("received data :
%s\n\n",rec_data);
send(con,rec_data,strlen(rec_data),0);
if(strcmp(rec_data,"end")==0)
break;
}
close(con);
close(sock);
return 0;
}
Client program
#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<stdlib.h>
#include<unistd.h>
#include<string.h>
#include<netdb.h>
#include<errno.h>
int
main()
{
int sock,byte_rec,port;
char send_data[1024],rec_data[1024];
struct hostent *host;
struct sockaddr_in ser,cli;
host=gethostbyname("127.0.0.1");
if((sock=socket(AF_INET,SOCK_STREAM,0))==-1)
{
perror("Socket\n");
exit(1);
}
printf("socket created\n");
ser.sin_family=AF_INET;
printf("Enter the port number : ");
scanf("%d",&port);
ser.sin_port=htons(port);
ser.sin_addr= *((struct in_addr
*)host->h_addr);
bzero(&(ser.sin_zero),8);
if(connect(sock,(struct
sockaddr*)&ser,sizeof(struct sockaddr))==-1)
{
perror("connect\n");
exit(1);
}
while(1)
{
printf("\nsend:");
scanf("%s",send_data);
send(sock,send_data,strlen(send_data),0);
byte_rec=recv(sock,rec_data,1024,0);
rec_data[byte_rec]='\0';
printf("Rec data :
%s\n",rec_data);
if(strcmp(rec_data,"end")==0)
break;
}
close(sock);
return 0;
}
OUTPUT
SERVER
[11ca013@mcalinux
network]$ cc 5tcpechoser.c
[11ca013@mcalinux
network]$ ./a.out
Enter
the port number : 3326
Waiting
Connected
received
data : hi
received
data : hello
received
data : how_are_you
received
data : i_am_fine
received
data : end
[11ca013@mcalinux
network]$
CLIENT
[11ca013@mcalinux
network]$ cc 5tcpechocli.c
[11ca013@mcalinux
network]$ ./a.out
socket
created
Enter
the port number : 3326
send:hi
Rec
data : hi
send:hello
Rec
data : hello
send:how_are_you
Rec
data : how_are_you
send:i_am_fine
Rec
data : i_am_fine
send:end
Rec
data : end
[11ca013@mcalinux
network]$
