#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define MAX 80
#define PORT 8080
#define SA struct sockaddr

int main (int argc, char **argv)
{
  int sockfd;
  struct sockaddr_in servaddr;

  // socket create and varification 
  sockfd = socket (AF_INET, SOCK_STREAM, 0);
  if (sockfd == -1) {
    printf ("socket creation failed...\n");
    exit (0);
  } else
    printf ("Socket successfully created..\n");
  bzero (&servaddr, sizeof (servaddr));

  // assign IP, PORT 
  servaddr.sin_family = AF_INET;
  servaddr.sin_addr.s_addr = inet_addr ("127.0.0.1");
  servaddr.sin_port = htons (PORT);

  // connect the client socket to server socket 
  if (connect (sockfd, (SA *) & servaddr, sizeof (servaddr)) != 0) {
    printf ("connection with the server failed...\n");
    exit (0);
  } else
    printf ("connected to the server..\n");

  // function for chat 
  {
  char buff[MAX];
  int n;

    for (;;) {
      bzero (buff, sizeof (buff));
      printf ("Enter the string : ");
      n = 0;
      while ((buff[n++] = getchar ()) != '\n') ;
      write (sockfd, buff, sizeof (buff));
      bzero (buff, sizeof (buff));
      read (sockfd, buff, sizeof (buff));
      printf ("From Server : %s", buff);
      if ((strncmp (buff, "exit", 4)) == 0) {
	printf ("Client Exit...\n");
	break;
      }
    }
  }

  // close the socket 
  close (sockfd);
}