/* Generic TCP client that reads from standard input
   and forwards to a TCP socket. Also sends to stdout anything
   received from the socket.

   This is an IPv6 client, although by changing only the call to 
   tcp_connect you can change it to an IPv4 client.

   command line parameters identify the TCP server.

   Uses many functions defined in common.c

*/

#include <stdio.h>	/* standard C i/o facilities */
#include <stdlib.h>	/* needed for atoi() */
#include <unistd.h>	/* Unix System Calls */
#include <sys/types.h>	/* system data type definitions */
#include <sys/socket.h> /* socket specific definitions */
#include <netinet/in.h> /* INET constants and stuff */
#include <arpa/inet.h>	/* IP address conversion stuff */
#include <netdb.h>	/* Name lookups (gethostbyname) */
#include <strings.h>

#include "common.h"

/* ===============================================================
   The following must passed in on the command line:
      name or address of the server (argv[1])
      port number or service name of the server (argv[2])

      getaddrinfo is given both values, and it can handle
      hostnames, dotted-decimal IPv4 addresses and
      IPv6 addresses (colon seperated HEX digits).
*/

int main( int argc, char **argv ) {
  int sk;

  /* first - check to make sure there are 2 command line parameters
     (argc=3 since the program name is argv[0]) 
  */

  if (argc!=3) {
    printf("Usage: client <server name> <server port>\n");
    exit(0);
  }

  sk = tcp_connect(argv[1],argv[2],PF_INET6);
  printf("Connected!\n");

  /* print information about the server
     (uses getnameinfo)
  */

  printremoteinfo(sk);
  
  /* Go handle the connection */
  tcp_talk(sk);

  close(sk);
  return(0);
}