| /* Datagram Socket Example |
| Copyright (C) 1991-2014 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 <sys/socket.h> |
| #include <sys/un.h> |
| |
| #define SERVER "/tmp/serversocket" |
| #define MAXMSG 512 |
| |
| int |
| main (void) |
| { |
| int sock; |
| char message[MAXMSG]; |
| struct sockaddr_un name; |
| size_t size; |
| int nbytes; |
| |
| /* Remove the filename first, it's ok if the call fails */ |
| unlink (SERVER); |
| |
| /* Make the socket, then loop endlessly. */ |
| sock = make_named_socket (SERVER); |
| while (1) |
| { |
| /* Wait for a datagram. */ |
| size = sizeof (name); |
| nbytes = recvfrom (sock, message, MAXMSG, 0, |
| (struct sockaddr *) & name, &size); |
| if (nbytes < 0) |
| { |
| perror ("recfrom (server)"); |
| exit (EXIT_FAILURE); |
| } |
| |
| /* Give a diagnostic message. */ |
| fprintf (stderr, "Server: got message: %s\n", message); |
| |
| /* Bounce the message back to the sender. */ |
| nbytes = sendto (sock, message, nbytes, 0, |
| (struct sockaddr *) & name, size); |
| if (nbytes < 0) |
| { |
| perror ("sendto (server)"); |
| exit (EXIT_FAILURE); |
| } |
| } |
| } |