2 * Copyright (c) 2009 Hiroki Sato. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 static const char rcsid[] =
31 #include <sys/param.h>
32 #include <sys/ioctl.h>
33 #include <sys/socket.h>
34 #include <sys/sysctl.h>
36 #include <net/route.h>
46 #include <arpa/inet.h>
48 #include <netinet/in.h>
49 #include <net/if_var.h>
50 #include <netinet/in_var.h>
51 #include <arpa/inet.h>
54 #include <netinet6/nd6.h>
58 #define MAX_SYSCTL_TRY 5
59 #define ND6BITS "\020\001PERFORMNUD\002ACCEPT_RTADV\003PREFER_SOURCE" \
60 "\004IFDISABLED\005DONT_SET_IFROUTE\006AUTO_LINKLOCAL" \
63 static int isnd6defif(int);
64 void setnd6flags(const char *, int, int, const struct afswtch *);
65 void setnd6defif(const char *, int, int, const struct afswtch *);
68 setnd6flags(const char *dummyaddr __unused,
70 const struct afswtch *afp)
75 memset(&nd, 0, sizeof(nd));
76 strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname));
77 error = ioctl(s, SIOCGIFINFO_IN6, &nd);
79 warn("ioctl(SIOCGIFINFO_IN6)");
83 nd.ndi.flags &= ~(-d);
86 error = ioctl(s, SIOCSIFINFO_IN6, (caddr_t)&nd);
88 warn("ioctl(SIOCSIFINFO_IN6)");
92 setnd6defif(const char *dummyaddr __unused,
94 const struct afswtch *afp)
96 struct in6_ndifreq ndifreq;
100 memset(&ndifreq, 0, sizeof(ndifreq));
101 strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname));
105 /* ifindex = 0 means to remove default if */
109 } else if ((ifindex = if_nametoindex(ndifreq.ifname)) == 0) {
110 warn("if_nametoindex(%s)", ndifreq.ifname);
114 ndifreq.ifindex = ifindex;
115 error = ioctl(s, SIOCSDEFIFACE_IN6, (caddr_t)&ndifreq);
117 warn("ioctl(SIOCSDEFIFACE_IN6)");
123 struct in6_ndifreq ndifreq;
124 unsigned int ifindex;
127 memset(&ndifreq, 0, sizeof(ndifreq));
128 strncpy(ndifreq.ifname, ifr.ifr_name, sizeof(ndifreq.ifname));
130 ifindex = if_nametoindex(ndifreq.ifname);
131 error = ioctl(s, SIOCGDEFIFACE_IN6, (caddr_t)&ndifreq);
133 warn("ioctl(SIOCGDEFIFACE_IN6)");
136 return (ndifreq.ifindex == ifindex);
142 struct in6_ndireq nd;
143 struct rt_msghdr *rtm;
149 int isinet6, isdefif;
151 /* Check if the interface has at least one IPv6 address. */
156 mib[4] = NET_RT_IFLIST;
157 mib[5] = if_nametoindex(ifr.ifr_name);
159 /* Try to prevent a race between two sysctls. */
162 error = sysctl(mib, 6, NULL, &needed, NULL, 0);
164 warn("sysctl(NET_RT_IFLIST)/estimate");
167 buf = malloc(needed);
169 warn("malloc for sysctl(NET_RT_IFLIST) failed");
172 if ((error = sysctl(mib, 6, buf, &needed, NULL, 0)) < 0) {
173 if (errno != ENOMEM || ++ntry >= MAX_SYSCTL_TRY) {
174 warn("sysctl(NET_RT_IFLIST)/get");
181 } while (buf == NULL);
184 for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
185 rtm = (struct rt_msghdr *)next;
187 if (rtm->rtm_version != RTM_VERSION)
189 if (rtm->rtm_type == RTM_NEWADDR) {
198 memset(&nd, 0, sizeof(nd));
199 strncpy(nd.ifname, ifr.ifr_name, sizeof(nd.ifname));
200 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
201 warn("socket(AF_INET6, SOCK_DGRAM)");
204 error = ioctl(s6, SIOCGIFINFO_IN6, &nd);
206 warn("ioctl(SIOCGIFINFO_IN6)");
210 isdefif = isnd6defif(s6);
212 if (nd.ndi.flags == 0 && !isdefif)
214 printb("\tnd6 options",
215 (unsigned int)(nd.ndi.flags | (isdefif << 15)), ND6BITS);
219 static struct afswtch af_nd6 = {
222 .af_other_status= nd6_status,
225 static __constructor void
228 af_register(&af_nd6);