#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<getopt.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netdb.h>
#include<string.h>
                                                                                               
#define READ    0
#define WRITE   1