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d9a17c07 | 1 | /* Example of Reading Datagrams |
f7a9f785 | 2 | Copyright (C) 1991-2016 Free Software Foundation, Inc. |
d9a17c07 RM |
3 | |
4 | This program is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU General Public License | |
6 | as published by the Free Software Foundation; either version 2 | |
7 | of the License, or (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
28f540f4 RM |
18 | #include <stdio.h> |
19 | #include <errno.h> | |
20 | #include <unistd.h> | |
21 | #include <stdlib.h> | |
22 | #include <sys/socket.h> | |
23 | #include <sys/un.h> | |
24 | ||
25 | #define SERVER "/tmp/serversocket" | |
26 | #define CLIENT "/tmp/mysocket" | |
27 | #define MAXMSG 512 | |
28 | #define MESSAGE "Yow!!! Are we having fun yet?!?" | |
29 | ||
30 | int | |
31 | main (void) | |
32 | { | |
33 | extern int make_named_socket (const char *name); | |
34 | int sock; | |
35 | char message[MAXMSG]; | |
36 | struct sockaddr_un name; | |
37 | size_t size; | |
38 | int nbytes; | |
39 | ||
40 | /* Make the socket. */ | |
41 | sock = make_named_socket (CLIENT); | |
42 | ||
43 | /* Initialize the server socket address. */ | |
356d7100 | 44 | name.sun_family = AF_LOCAL; |
28f540f4 RM |
45 | strcpy (name.sun_path, SERVER); |
46 | size = strlen (name.sun_path) + sizeof (name.sun_family); | |
47 | ||
48 | /* Send the datagram. */ | |
49 | nbytes = sendto (sock, MESSAGE, strlen (MESSAGE) + 1, 0, | |
50 | (struct sockaddr *) & name, size); | |
51 | if (nbytes < 0) | |
52 | { | |
53 | perror ("sendto (client)"); | |
54 | exit (EXIT_FAILURE); | |
55 | } | |
56 | ||
57 | /* Wait for a reply. */ | |
58 | nbytes = recvfrom (sock, message, MAXMSG, 0, NULL, 0); | |
59 | if (nbytes < 0) | |
60 | { | |
61 | perror ("recfrom (client)"); | |
62 | exit (EXIT_FAILURE); | |
63 | } | |
64 | ||
65 | /* Print a diagnostic message. */ | |
66 | fprintf (stderr, "Client: got message: %s\n", message); | |
67 | ||
68 | /* Clean up. */ | |
69 | remove (CLIENT); | |
70 | close (sock); | |
71 | } |