/* Example of Reading Datagrams

   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 <unistd.h>

#include <stdlib.h>

#include <sys/socket.h>

#include <sys/un.h>

#define SERVER	"/tmp/serversocket"

#define CLIENT	"/tmp/mysocket"

#define MAXMSG	512

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

int

main (void)

{

  extern int make_named_socket (const char *name);

  int sock;

  char message[MAXMSG];

  struct sockaddr_un name;

  size_t size;

  int nbytes;

  /* Make the socket. */

  sock = make_named_socket (CLIENT);

  /* Initialize the server socket address. */

  name.sun_family = AF_LOCAL;

  strcpy (name.sun_path, SERVER);

  size = strlen (name.sun_path) + sizeof (name.sun_family);

  /* Send the datagram. */

  nbytes = sendto (sock, MESSAGE, strlen (MESSAGE) + 1, 0,

		   (struct sockaddr *) & name, size);

  if (nbytes < 0)

    {

      perror ("sendto (client)");

      exit (EXIT_FAILURE);

    }

  /* Wait for a reply. */

  nbytes = recvfrom (sock, message, MAXMSG, 0, NULL, 0);

  if (nbytes < 0)

    {

      perror ("recfrom (client)");

      exit (EXIT_FAILURE);

    }

  /* Print a diagnostic message. */

  fprintf (stderr, "Client: got message: %s\n", message);

  /* Clean up. */

  remove (CLIENT);

  close (sock);

}