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/* $OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp $ */
/* $NetBSD: bindresvport.c,v 1.5 1995/06/03 22:37:19 mycroft Exp $ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/
/*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/
static char *rcsid = "$OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp $";
#endif
/*
* Copyright (c) 1987 by Sun Microsystems, Inc.
*
* Portions Copyright(C) 1996, Jason Downs. All rights reserved.
*/
#include <string.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
/*
* Bind a socket to a privileged IP port
*/
int
bindresvport(sd, sin)
int sd;
struct sockaddr_in *sin;
{
int on, old, error;
struct sockaddr_in myaddr;
int sinlen = sizeof(struct sockaddr_in);
if (sin == (struct sockaddr_in *)0) {
sin = &myaddr;
memset(sin, 0, sizeof(*sin));
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
} else if (sin->sin_family != AF_INET) {
errno = EPFNOSUPPORT;
return (-1);
}
if (sin->sin_port == 0) {
int oldlen = sizeof(old);
error = getsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
&old, &oldlen);
if (error < 0)
return(error);
on = IP_PORTRANGE_LOW;
error = setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
&on, sizeof(on));
if (error < 0)
return(error);
}
error = bind(sd, (struct sockaddr *)sin, sizeof(*sin));
if (sin->sin_port == 0) {
int saved_errno = errno;
if (error) {
if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
&old, sizeof(old)) < 0)
errno = saved_errno;
return (error);
}
if (sin != &myaddr) {
int sinlen = sizeof(*sin);
/* Hmm, what did the kernel assign... */
if (getsockname(sd, (struct sockaddr *)sin,
&sinlen) < 0)
errno = saved_errno;
return (error);
}
}
return (error);
}
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