72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* Example of Reading Datagrams
|
|
Copyright (C) 1991-2012 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);
|
|
}
|