110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
/*
|
|
* 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";*/
|
|
/*from: OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp */
|
|
static char *rcsid = "$Id: bindresvport.c,v 1.4 1996/06/10 00:49:15 jraynard Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* Copyright (c) 1987 by Sun Microsystems, Inc.
|
|
*
|
|
* Portions Copyright(C) 1996, Jason Downs. All rights reserved.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <unistd.h>
|
|
#include <string.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);
|
|
}
|