1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1999 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "rpc_mt.h" 30 #include <stdio.h> 31 #include <fcntl.h> 32 #include <sys/types.h> 33 #include <sys/socket.h> 34 #include <unistd.h> 35 #include <net/if.h> 36 #include <sys/sockio.h> 37 38 /* 39 * Determine if we have a configured interface for the specified address 40 * family. 41 */ 42 int 43 __can_use_af(sa_family_t af) { 44 45 struct lifnum lifn; 46 int fd; 47 48 if ((fd = open("/dev/udp", O_RDONLY)) < 0) { 49 return (0); 50 } 51 lifn.lifn_family = af; 52 lifn.lifn_flags = IFF_UP & !(IFF_NOXMIT | IFF_DEPRECATED); 53 if (ioctl(fd, SIOCGLIFNUM, &lifn, sizeof (lifn)) < 0) { 54 lifn.lifn_count = 0; 55 } 56 57 (void) close(fd); 58 return (lifn.lifn_count); 59 } 60