/* =============================================================> simple.c 
 * Simple example of a network program for the Unix environment using TCP.
 *
 * This client program simply accesses a server socket and writes a message
 * gets a response and terminates.
 * 
 * ==================================================================
 *

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>

void main() 
{ 
   int                  sock, addrsize; 
   struct sockaddr_in   addr; 
   char                 buffer [81]; 
 
   /* 
    * Open a socket for the Internet address family and stream 
    * communication. 
    */ 

   sock = socket(AF_INET, SOCK_STREAM,0); 
   if (sock == -1) 
   {
      perror("opening socket"); 
      exit(-1); 
   } 
 


   /* 
    * Connect the socket to a server process as specified by a known IP 
    * address and port. 
    */ 
 
   addr.sin_family = AF_INET; 

   addr.sin_port = htons (32351); 
   addr.sin_addr.s_addr = inet_network ("192.31.215.210");  
   if (connect(sock, &addr, sizeof (struct sockaddr_in)) == -1) 
   {    
      perror("on connect"); 
      exit(-1); 
   }  
 
   /*  
    * Write a message and get the response. 
    */ 
 
   nchar = send (sock, "client calling server, do you read me", 38, 0); 
   nchar = recv (sock, buffer, 80, 0); 
 
   /*  
    * Do a shutdown to gracefully terminate by saying - "no more data" 
    * and then close the socket -- the shutdown is optional  
    */ 
 
   if (shutdown(sock, 1) == -1) 
   {   
      perror("on shutdown"); 
      exit(-1); 
   } 
 
   close(sock); 
}