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 * $FreeBSD$
30 */
31 #include <sys/param.h>
32 #include <sys/ioctl.h>
33
34 #include <net/if.h>
35 #include <netinet/in.h>
36
37 #include <errno.h>
38 #include <ifaddrs.h>
39 #include <string.h>
40 #include <strings.h>
41
42 #include "libifconfig.h"
43 #include "libifconfig_internal.h"
44
45
46 static int
inet6_prefixlen(struct in6_addr * addr)47 inet6_prefixlen(struct in6_addr *addr)
48 {
49 int prefixlen = 0;
50 int i;
51
52 for (i = 0; i < 4; i++) {
53 int x = ffs(ntohl(addr->__u6_addr.__u6_addr32[i]));
54 prefixlen += x == 0 ? 0 : 33 - x;
55 if (x != 1) {
56 break;
57 }
58 }
59 return (prefixlen);
60 }
61
62 int
ifconfig_inet6_get_addrinfo(ifconfig_handle_t * h,const char * name,struct ifaddrs * ifa,struct ifconfig_inet6_addr * addr)63 ifconfig_inet6_get_addrinfo(ifconfig_handle_t *h,
64 const char *name, struct ifaddrs *ifa, struct ifconfig_inet6_addr *addr)
65 {
66 struct sockaddr_in6 *netmask;
67 struct in6_ifreq ifr6;
68
69 bzero(addr, sizeof(*addr));
70
71 /* Set the address */
72 addr->sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
73
74 /* Set the destination address */
75 if (ifa->ifa_flags & IFF_POINTOPOINT) {
76 addr->dstin6 = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
77 }
78
79 /* Set the prefixlen */
80 netmask = (struct sockaddr_in6 *)ifa->ifa_netmask;
81 addr->prefixlen = inet6_prefixlen(&netmask->sin6_addr);
82
83 /* Set the flags */
84 strlcpy(ifr6.ifr_name, name, sizeof(ifr6.ifr_name));
85 ifr6.ifr_addr = *addr->sin6;
86 if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFAFLAG_IN6, &ifr6) < 0) {
87 return (-1);
88 }
89 addr->flags = ifr6.ifr_ifru.ifru_flags6;
90
91 /* Set the lifetimes */
92 memset(&addr->lifetime, 0, sizeof(addr->lifetime));
93 ifr6.ifr_addr = *addr->sin6;
94 if (ifconfig_ioctlwrap(h, AF_INET6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) {
95 return (-1);
96 }
97 addr->lifetime = ifr6.ifr_ifru.ifru_lifetime; /* struct copy */
98
99 /* Set the vhid */
100 if (ifa->ifa_data && ifa->ifa_data) {
101 addr->vhid = ((struct if_data *)ifa->ifa_data)->ifi_vhid;
102 }
103
104 return (0);
105 }
106