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