blob: 1cd61e58dbad7ae6ec27046e2b76d5d4ce7b3454 [file] [log] [blame]
Darren Tucker5a0bdf72005-11-12 14:28:05 +11001/* $OpenBSD: rresvport.c,v 1.9 2005/11/10 10:00:17 espie Exp $ */
Damien Miller34132e52000-01-14 15:45:46 +11002/*
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.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
Damien Miller329638e2003-06-03 12:12:50 +100015 * 3. Neither the name of the University nor the names of its contributors
Damien Miller34132e52000-01-14 15:45:46 +110016 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
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
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
Darren Tucker7f24a0e2005-11-10 16:18:56 +110032/* OPENBSD ORIGINAL: lib/libc/net/rresvport.c */
33
Ben Lindstromdd21fe92002-06-27 18:23:20 +000034#include "includes.h"
Damien Miller34132e52000-01-14 15:45:46 +110035
36#ifndef HAVE_RRESVPORT_AF
37
Damien Miller607aede2006-09-01 15:48:19 +100038#include <sys/types.h>
39#include <sys/socket.h>
40
41#include <netinet/in.h>
Darren Tucker46aa3e02006-09-02 15:32:40 +100042#include <arpa/inet.h>
Damien Miller607aede2006-09-01 15:48:19 +100043
Darren Tucker2eaea992006-07-12 23:41:33 +100044#include <errno.h>
Darren Tuckerc1abe8e2006-08-24 19:53:40 +100045#include <stdlib.h>
Damien Miller62da44f2006-07-24 15:08:35 +100046#include <string.h>
Damien Miller639ce592008-07-14 12:03:27 +100047#include <unistd.h>
Darren Tucker2eaea992006-07-12 23:41:33 +100048
Damien Miller34132e52000-01-14 15:45:46 +110049#if 0
50int
Darren Tucker91b34dc2005-11-10 17:42:40 +110051rresvport(int *alport)
Damien Miller34132e52000-01-14 15:45:46 +110052{
53 return rresvport_af(alport, AF_INET);
54}
55#endif
56
Darren Tucker91b34dc2005-11-10 17:42:40 +110057int
Damien Miller8148fa32000-07-09 21:23:52 +100058rresvport_af(int *alport, sa_family_t af)
Damien Miller34132e52000-01-14 15:45:46 +110059{
60 struct sockaddr_storage ss;
61 struct sockaddr *sa;
62 u_int16_t *portp;
63 int s;
Ben Lindstrom0d5af602001-01-09 00:50:29 +000064 socklen_t salen;
Damien Miller34132e52000-01-14 15:45:46 +110065
Damien Miller3f62aba2000-11-29 11:56:35 +110066 memset(&ss, '\0', sizeof ss);
Damien Miller34132e52000-01-14 15:45:46 +110067 sa = (struct sockaddr *)&ss;
68
69 switch (af) {
70 case AF_INET:
Damien Millereaf99942000-01-19 13:45:07 +110071 salen = sizeof(struct sockaddr_in);
Damien Miller34132e52000-01-14 15:45:46 +110072 portp = &((struct sockaddr_in *)sa)->sin_port;
73 break;
74 case AF_INET6:
Damien Millereaf99942000-01-19 13:45:07 +110075 salen = sizeof(struct sockaddr_in6);
Damien Miller34132e52000-01-14 15:45:46 +110076 portp = &((struct sockaddr_in6 *)sa)->sin6_port;
77 break;
78 default:
79 errno = EPFNOSUPPORT;
80 return (-1);
81 }
82 sa->sa_family = af;
83
84 s = socket(af, SOCK_STREAM, 0);
85 if (s < 0)
86 return (-1);
87
88 *portp = htons(*alport);
89 if (*alport < IPPORT_RESERVED - 1) {
Damien Millereaf99942000-01-19 13:45:07 +110090 if (bind(s, sa, salen) >= 0)
Damien Miller34132e52000-01-14 15:45:46 +110091 return (s);
92 if (errno != EADDRINUSE) {
93 (void)close(s);
94 return (-1);
95 }
96 }
97
98 *portp = 0;
Damien Miller2a5c1ce2001-01-25 10:32:00 +110099 sa->sa_family = af;
100 if (bindresvport_sa(s, sa) == -1) {
Damien Miller34132e52000-01-14 15:45:46 +1100101 (void)close(s);
102 return (-1);
103 }
104 *alport = ntohs(*portp);
105 return (s);
106}
107
108#endif /* HAVE_RRESVPORT_AF */