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

int main()
{
 int sock, listener;
 struct sockaddr_in addr;
 char buf[1024];
 int bytes_read;
 
 listener = socket(AF_INET, SOCK_STREAM, 0);
 
 if (listener < 0)
  {
   perror("SOCKET!");
   exit(1);
  
  }
  
  addr.sin_family = AF_INET;
  addr.sin_port = htons(3425);
  addr.sin_addr.s_addr = htonl(INADDR_ANY);
  
  if (bind(listener, (struct sockaddr *)&addr, sizeof(addr)) <0 )
   {
    perror("BIND!!");
    exit(2);
   
   }
   
  listen(listener, 1);
  
  while(1)
  {
   sock=accept(listener, NULL, NULL);
   if (sock < 0)
    {
     perror("ACCEPT!");
     exit(3);
    }
   while(1)
    {
     bytes_read = recv(sock, buf, 1024, 0);
     if (bytes_read <= 0 ) break;
     send (sock, buf, bytes_read, 0);
    
    
    }    

   close(sock);    
  } 


 return 0;
}