/* Byte Stream Socket Example

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or

   modify it under the terms of the GNU General Public License

   as published by the Free Software Foundation; either version 2

   of the License, or (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.

*/

#include <stdio.h>

#include <errno.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <netdb.h>

#define PORT		5555

#define MESSAGE		"Yow!!! Are we having fun yet?!?"

#define SERVERHOST 	"www.gnu.org"

void

write_to_server (int filedes)

{

  int nbytes;

  nbytes = write (filedes, MESSAGE, strlen (MESSAGE) + 1);

  if (nbytes < 0)

    {

      perror ("write");

      exit (EXIT_FAILURE);

    }

}

int

main (void)

{

  extern void init_sockaddr (struct sockaddr_in *name,

			     const char *hostname,

			     uint16_t port);

  int sock;

  struct sockaddr_in servername;

  /* Create the socket.  */

  sock = socket (PF_INET, SOCK_STREAM, 0);

  if (sock < 0)

    {

      perror ("socket (client)");

      exit (EXIT_FAILURE);

    }

  /* Connect to the server.  */

  init_sockaddr (&servername, SERVERHOST, PORT);

  if (0 > connect (sock,

		   (struct sockaddr *) &servername,

		   sizeof (servername)))

    {

      perror ("connect (client)");

      exit (EXIT_FAILURE);

    }

  /* Send data to the server.  */

  write_to_server (sock);

  close (sock);

  exit (EXIT_SUCCESS);

}