1 /* $OpenBSD: rresvport.c,v 1.9 2005/11/10 10:00:17 espie Exp $ */
3 * Copyright (c) 1995, 1996, 1998 Theo de Raadt. All rights reserved.
4 * Copyright (c) 1983, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 /* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */
36 #ifndef HAVE_RRESVPORT_AF
40 rresvport(int *alport)
42 return rresvport_af(alport, AF_INET);
47 rresvport_af(int *alport, sa_family_t af)
49 struct sockaddr_storage ss;
55 memset(&ss, '\0', sizeof ss);
56 sa = (struct sockaddr *)&ss;
60 salen = sizeof(struct sockaddr_in);
61 portp = &((struct sockaddr_in *)sa)->sin_port;
64 salen = sizeof(struct sockaddr_in6);
65 portp = &((struct sockaddr_in6 *)sa)->sin6_port;
73 s = socket(af, SOCK_STREAM, 0);
77 *portp = htons(*alport);
78 if (*alport < IPPORT_RESERVED - 1) {
79 if (bind(s, sa, salen) >= 0)
81 if (errno != EADDRINUSE) {
89 if (bindresvport_sa(s, sa) == -1) {
93 *alport = ntohs(*portp);
97 #endif /* HAVE_RRESVPORT_AF */