1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 #include <sys/param.h> 30 #include <sys/ioctl.h> 31 32 #include <net/if.h> 33 #include <netinet/in.h> 34 35 #include <errno.h> 36 #include <ifaddrs.h> 37 #include <string.h> 38 #include <strings.h> 39 40 #include "libifconfig.h" 41 #include "libifconfig_internal.h" 42 43 static const struct sockaddr_in NULL_SIN; 44 45 static int 46 inet_prefixlen(const struct in_addr *addr) 47 { 48 int x; 49 50 x = ffs(ntohl(addr->s_addr)); 51 return (x == 0 ? 0 : 33 - x); 52 } 53 54 int 55 ifconfig_inet_get_addrinfo(ifconfig_handle_t *h __unused, 56 const char *name __unused, struct ifaddrs *ifa, 57 struct ifconfig_inet_addr *addr) 58 { 59 bzero(addr, sizeof(*addr)); 60 61 /* Set the address */ 62 if (ifa->ifa_addr == NULL) { 63 return (-1); 64 } else { 65 addr->sin = (struct sockaddr_in *)ifa->ifa_addr; 66 } 67 68 /* Set the destination address */ 69 if (ifa->ifa_flags & IFF_POINTOPOINT) { 70 if (ifa->ifa_dstaddr) { 71 addr->dst = (struct sockaddr_in *)ifa->ifa_dstaddr; 72 } else { 73 addr->dst = &NULL_SIN; 74 } 75 } 76 77 /* Set the netmask and prefixlen */ 78 if (ifa->ifa_netmask) { 79 addr->netmask = (struct sockaddr_in *)ifa->ifa_netmask; 80 } else { 81 addr->netmask = &NULL_SIN; 82 } 83 addr->prefixlen = inet_prefixlen(&addr->netmask->sin_addr); 84 85 /* Set the broadcast */ 86 if (ifa->ifa_flags & IFF_BROADCAST) { 87 addr->broadcast = (struct sockaddr_in *)ifa->ifa_broadaddr; 88 } 89 90 /* Set the vhid */ 91 if (ifa->ifa_data) { 92 addr->vhid = ((struct if_data *)ifa->ifa_data)->ifi_vhid; 93 } 94 95 return (0); 96 } 97