124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/* This file has be modified from the original OpenBSD source */
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/*
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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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#include "includes.h"
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#ifndef HAVE_BINDRESVPORT_SA
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *rcsid = "$OpenBSD: bindresvport.c,v 1.13 2000/01/26 03:43:21 deraadt Exp $";
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#endif /* LIBC_SCCS and not lint */
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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 "includes.h"
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#define STARTPORT 600
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#define ENDPORT (IPPORT_RESERVED - 1)
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#define NPORTS (ENDPORT - STARTPORT + 1)
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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(sd, sa)
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int sd;
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struct sockaddr *sa;
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{
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int error, af;
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struct sockaddr_storage myaddr;
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struct sockaddr_in *sin;
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struct sockaddr_in6 *sin6;
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u_int16_t *portp;
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u_int16_t port;
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socklen_t salen;
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int i;
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if (sa == NULL) {
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memset(&myaddr, 0, 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(&myaddr, 0, salen);
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} else
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af = sa->sa_family;
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if (af == AF_INET) {
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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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} else if (af == AF_INET6) {
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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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} else {
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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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port = ntohs(*portp);
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if (port == 0)
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port = (arc4random() % NPORTS) + STARTPORT;
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/* Avoid warning */
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error = -1;
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for(i = 0; i < NPORTS; i++) {
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*portp = htons(port);
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error = bind(sd, sa, salen);
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/* Terminate on success */
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if (error == 0)
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break;
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/* Terminate on errors, except "address already in use" */
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if ((error < 0) && !((errno == EADDRINUSE) || (errno == EINVAL)))
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break;
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port++;
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if (port > ENDPORT)
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port = STARTPORT;
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}
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return (error);
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}
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#endif /* HAVE_BINDRESVPORT_SA */
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