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 44 static int 45 inet6_prefixlen(struct in6_addr *addr) 46 { 47 int prefixlen = 0; 48 int i; 49 50 for (i = 0; i < 4; i++) { 51 int x = ffs(ntohl(addr->__u6_addr.__u6_addr32[i])); 52 prefixlen += x == 0 ? 0 : 33 - x; 53 if (x != 1) { 54 break; 55 } 56 } 57 return (prefixlen); 58 } 59 60 int 61 ifconfig_inet6_get_addrinfo(ifconfig_handle_t *h, 62 const char *name, struct ifaddrs *ifa, struct ifconfig_inet6_addr *addr) 63 { 64 struct sockaddr_in6 *netmask; 65 struct in6_ifreq ifr6; 66 67 bzero(addr, sizeof(*addr)); 68 69 /* Set the address */ 70 addr->sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 71 72 /* Set the destination address */ 73 if (ifa->ifa_flags & IFF_POINTOPOINT) { 74 addr->dstin6 = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 75 } 76 77 /* Set the prefixlen */ 78 netmask = (struct sockaddr_in6 *)ifa->ifa_netmask; 79 addr->prefixlen = inet6_prefixlen(&netmask->sin6_addr); 80 81 /* Set the flags */ 82 strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name)); 83 ifr6.ifr_addr = *addr->sin6; 84 if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 85 return (-1); 86 } 87 addr->flags = ifr6.ifr_ifru.ifru_flags6; 88 89 /* Set the lifetimes */ 90 memset(&addr->lifetime, 0, sizeof(addr->lifetime)); 91 ifr6.ifr_addr = *addr->sin6; 92 if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 93 return (-1); 94 } 95 addr->lifetime = ifr6.ifr_ifru.ifru_lifetime; /* struct copy */ 96 97 /* Set the vhid */ 98 if (ifa->ifa_data) { 99 addr->vhid = ((struct if_data *)ifa->ifa_data)->ifi_vhid; 100 } 101 102 return (0); 103 } 104