xref: /illumos-gate/usr/src/lib/libnsl/rpc/can_use_af.c (revision 1da57d55)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
2261961e0fSrobinson 
237c478bd9Sstevel@tonic-gate /*
24*e8031f0aSraf  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
2561961e0fSrobinson  * Use is subject to license terms.
267c478bd9Sstevel@tonic-gate  */
277c478bd9Sstevel@tonic-gate 
28*e8031f0aSraf #include "mt.h"
297c478bd9Sstevel@tonic-gate #include "rpc_mt.h"
307c478bd9Sstevel@tonic-gate #include <stdio.h>
317c478bd9Sstevel@tonic-gate #include <fcntl.h>
327c478bd9Sstevel@tonic-gate #include <sys/types.h>
337c478bd9Sstevel@tonic-gate #include <sys/socket.h>
347c478bd9Sstevel@tonic-gate #include <unistd.h>
357c478bd9Sstevel@tonic-gate #include <net/if.h>
367c478bd9Sstevel@tonic-gate #include <sys/sockio.h>
377c478bd9Sstevel@tonic-gate 
387c478bd9Sstevel@tonic-gate /*
397c478bd9Sstevel@tonic-gate  * Determine if we have a configured interface for the specified address
407c478bd9Sstevel@tonic-gate  * family.
417c478bd9Sstevel@tonic-gate  */
427c478bd9Sstevel@tonic-gate int
__can_use_af(sa_family_t af)4361961e0fSrobinson __can_use_af(sa_family_t af)
4461961e0fSrobinson {
457c478bd9Sstevel@tonic-gate 	struct lifnum	lifn;
467c478bd9Sstevel@tonic-gate 	int		fd;
477c478bd9Sstevel@tonic-gate 
4861961e0fSrobinson 	if ((fd =  open("/dev/udp", O_RDONLY)) < 0)
497c478bd9Sstevel@tonic-gate 		return (0);
507c478bd9Sstevel@tonic-gate 	lifn.lifn_family = af;
5161961e0fSrobinson 	/* XXX Remove this after fixing 6204567 */
5261961e0fSrobinson 	/* CONSTCOND */
537c478bd9Sstevel@tonic-gate 	lifn.lifn_flags = IFF_UP & !(IFF_NOXMIT | IFF_DEPRECATED);
5461961e0fSrobinson 	if (ioctl(fd, SIOCGLIFNUM, &lifn, sizeof (lifn)) < 0)
557c478bd9Sstevel@tonic-gate 		lifn.lifn_count = 0;
567c478bd9Sstevel@tonic-gate 
577c478bd9Sstevel@tonic-gate 	(void) close(fd);
587c478bd9Sstevel@tonic-gate 	return (lifn.lifn_count);
597c478bd9Sstevel@tonic-gate }
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