1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* network.c -- a network mock program for use by unit tests
* Copyright (C) 2008 SEIKO EPSON CORPORATION
*
* License: GPLv2+
* Authors: AVASYS CORPORATION
*
* This file is part of Image Scan!'s SANE backend test suite.
*
* Image Scan!'s SANE backend test suite 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 ought to have received a copy of the GNU General Public License
* along with this package. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
int
main (int argc, char *argv[])
{
socklen_t n;
int r;
int s;
int as;
struct sockaddr_in addr;
s = socket (AF_INET, SOCK_STREAM, 0);
if (0 > s)
{
perror ("socket");
return EXIT_FAILURE;
}
memset (&addr, 0, sizeof (addr));
addr.sin_family = PF_INET;
addr.sin_port = 0;
addr.sin_addr.s_addr = INADDR_ANY;
r = bind (s, (struct sockaddr *) &addr, sizeof (addr));
if (0 > r)
{
perror ("bind");
return EXIT_FAILURE;
}
n = sizeof (addr);
r = getsockname (s, (struct sockaddr *) &addr, &n);
if (0 > r)
{
perror ("getsockname");
return EXIT_FAILURE;
}
setvbuf (stdout, NULL, _IONBF, BUFSIZ);
fprintf (stdout, "%d\n", ntohs (addr.sin_port));
fclose (stdout); /* not strictly needed */
listen (s, 0);
as = accept (s, (struct sockaddr*) &addr, (socklen_t*) &n);
pause ();
close (s);
close (as);
return EXIT_SUCCESS;
}
|
