8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
159 lines
4.2 KiB
C
159 lines
4.2 KiB
C
/* $NetBSD: bindresvport.c,v 1.19 2000/07/06 03:03:59 christos Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";
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static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";
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#endif
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/* from: $OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp $ */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Copyright (c) 1987 by Sun Microsystems, Inc.
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*
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* Portions Copyright(C) 1996, Jason Downs. All rights reserved.
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*/
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <rpc/rpc.h>
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#include <string.h>
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#include "un-namespace.h"
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/*
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* Bind a socket to a privileged IP port
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*/
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int
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bindresvport(int sd, struct sockaddr_in *sin)
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{
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return bindresvport_sa(sd, (struct sockaddr *)sin);
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}
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/*
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* Bind a socket to a privileged IP port
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*/
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int
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bindresvport_sa(int sd, struct sockaddr *sa)
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{
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int old, error, af;
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struct sockaddr_storage myaddr;
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struct sockaddr_in *sin;
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#ifdef INET6
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struct sockaddr_in6 *sin6;
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#endif
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int proto, portrange, portlow;
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u_int16_t *portp;
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socklen_t salen;
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if (sa == NULL) {
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salen = sizeof(myaddr);
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sa = (struct sockaddr *)&myaddr;
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if (_getsockname(sd, sa, &salen) == -1)
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return -1; /* errno is correctly set */
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af = sa->sa_family;
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memset(sa, 0, salen);
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} else
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af = sa->sa_family;
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switch (af) {
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case AF_INET:
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proto = IPPROTO_IP;
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portrange = IP_PORTRANGE;
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portlow = IP_PORTRANGE_LOW;
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sin = (struct sockaddr_in *)sa;
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salen = sizeof(struct sockaddr_in);
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portp = &sin->sin_port;
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break;
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#ifdef INET6
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case AF_INET6:
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proto = IPPROTO_IPV6;
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portrange = IPV6_PORTRANGE;
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portlow = IPV6_PORTRANGE_LOW;
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sin6 = (struct sockaddr_in6 *)sa;
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salen = sizeof(struct sockaddr_in6);
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portp = &sin6->sin6_port;
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break;
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#endif
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default:
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errno = EPFNOSUPPORT;
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return (-1);
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}
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sa->sa_family = af;
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sa->sa_len = salen;
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if (*portp == 0) {
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socklen_t oldlen = sizeof(old);
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error = _getsockopt(sd, proto, portrange, &old, &oldlen);
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if (error < 0)
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return (error);
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error = _setsockopt(sd, proto, portrange, &portlow,
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sizeof(portlow));
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if (error < 0)
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return (error);
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}
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error = _bind(sd, sa, salen);
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if (*portp == 0) {
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int saved_errno = errno;
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if (error < 0) {
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if (_setsockopt(sd, proto, portrange, &old,
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sizeof(old)) < 0)
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errno = saved_errno;
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return (error);
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}
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if (sa != (struct sockaddr *)&myaddr) {
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/* Hmm, what did the kernel assign? */
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if (_getsockname(sd, sa, &salen) < 0)
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errno = saved_errno;
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return (error);
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}
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}
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return (error);
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}
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