108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "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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/*from: OpenBSD: bindresvport.c,v 1.7 1996/07/30 16:25:47 downsj Exp */
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static char *rcsid = "$Id: bindresvport.c,v 1.6 1996/12/30 14:12:36 peter Exp $";
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#endif
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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 <sys/types.h>
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#include <sys/errno.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <unistd.h>
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#include <string.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(sd, sin)
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int sd;
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struct sockaddr_in *sin;
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{
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int on, old, error;
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struct sockaddr_in myaddr;
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int sinlen = sizeof(struct sockaddr_in);
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if (sin == (struct sockaddr_in *)0) {
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sin = &myaddr;
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memset(sin, 0, sinlen);
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sin->sin_len = sinlen;
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sin->sin_family = AF_INET;
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} else if (sin->sin_family != AF_INET) {
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errno = EPFNOSUPPORT;
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return (-1);
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}
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if (sin->sin_port == 0) {
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int oldlen = sizeof(old);
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error = getsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
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&old, &oldlen);
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if (error < 0)
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return(error);
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on = IP_PORTRANGE_LOW;
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error = setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
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&on, sizeof(on));
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if (error < 0)
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return(error);
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}
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error = bind(sd, (struct sockaddr *)sin, sinlen);
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if (sin->sin_port == 0) {
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int saved_errno = errno;
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if (error) {
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if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
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&old, 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 (sin != &myaddr) {
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/* Hmm, what did the kernel assign... */
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if (getsockname(sd, (struct sockaddr *)sin,
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&sinlen) < 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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