1 /* $NetBSD: bindresvport.c,v 1.19 2000/07/06 03:03:59 christos Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (c) 2009, Sun Microsystems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 * - Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * - Neither the name of Sun Microsystems, Inc. nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
33 #if defined(LIBC_SCCS) && !defined(lint)
34 static char *sccsid2 = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";
35 static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";
37 /* from: $OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp $ */
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * Copyright (c) 1987 by Sun Microsystems, Inc.
44 * Portions Copyright(C) 1996, Jason Downs. All rights reserved.
47 #include "namespace.h"
48 #include <sys/types.h>
49 #include <sys/socket.h>
51 #include <netinet/in.h>
60 #include "un-namespace.h"
63 * Bind a socket to a privileged IP port
66 bindresvport(int sd, struct sockaddr_in *sin)
68 return bindresvport_sa(sd, (struct sockaddr *)sin);
72 * Bind a socket to a privileged IP port
75 bindresvport_sa(int sd, struct sockaddr *sa)
78 struct sockaddr_storage myaddr;
79 struct sockaddr_in *sin;
81 struct sockaddr_in6 *sin6;
83 int proto, portrange, portlow;
88 salen = sizeof(myaddr);
89 sa = (struct sockaddr *)&myaddr;
91 if (_getsockname(sd, sa, &salen) == -1)
92 return -1; /* errno is correctly set */
102 portrange = IP_PORTRANGE;
103 portlow = IP_PORTRANGE_LOW;
104 sin = (struct sockaddr_in *)sa;
105 salen = sizeof(struct sockaddr_in);
106 portp = &sin->sin_port;
110 proto = IPPROTO_IPV6;
111 portrange = IPV6_PORTRANGE;
112 portlow = IPV6_PORTRANGE_LOW;
113 sin6 = (struct sockaddr_in6 *)sa;
114 salen = sizeof(struct sockaddr_in6);
115 portp = &sin6->sin6_port;
119 errno = EPFNOSUPPORT;
126 socklen_t oldlen = sizeof(old);
128 error = _getsockopt(sd, proto, portrange, &old, &oldlen);
132 error = _setsockopt(sd, proto, portrange, &portlow,
138 error = _bind(sd, sa, salen);
141 int saved_errno = errno;
144 if (_setsockopt(sd, proto, portrange, &old,
150 if (sa != (struct sockaddr *)&myaddr) {
151 /* Hmm, what did the kernel assign? */
152 if (_getsockname(sd, sa, &salen) < 0)