1 /* $KAME: mld6.c,v 1.15 2003/04/02 11:29:54 suz Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (C) 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
39 #include <sys/socket.h>
40 #include <sys/types.h>
48 #include <netinet/in.h>
49 #include <netinet/ip6.h>
50 #include <netinet/icmp6.h>
52 #include <arpa/inet.h>
59 /* portability with older KAME headers */
60 #ifndef MLD_LISTENER_QUERY
61 #define MLD_LISTENER_QUERY MLD6_LISTENER_QUERY
62 #define MLD_LISTENER_REPORT MLD6_LISTENER_REPORT
63 #define MLD_LISTENER_DONE MLD6_LISTENER_DONE
64 #define MLD_MTRACE_RESP MLD6_MTRACE_RESP
65 #define MLD_MTRACE MLD6_MTRACE
66 #define mld_hdr mld6_hdr
67 #define mld_type mld6_type
68 #define mld_code mld6_code
69 #define mld_cksum mld6_cksum
70 #define mld_maxdelay mld6_maxdelay
71 #define mld_reserved mld6_reserved
72 #define mld_addr mld6_addr
74 #ifndef IP6OPT_ROUTER_ALERT
75 #define IP6OPT_ROUTER_ALERT IP6OPT_RTALERT
79 struct sockaddr_in6 dst;
81 struct in6_addr maddr = IN6ADDR_ANY_INIT, any = IN6ADDR_ANY_INIT;
82 struct ipv6_mreq mreq;
86 #define QUERY_RESPONSE_INTERVAL 10000
88 void make_msg(int index, struct in6_addr *addr, u_int type);
94 main(int argc, char *argv[])
97 struct icmp6_filter filt;
100 struct itimerval itimer;
104 type = MLD_LISTENER_QUERY;
105 while ((ch = getopt(argc, argv, "dr")) != -1) {
108 type = MLD_LISTENER_DONE;
111 type = MLD_LISTENER_REPORT;
122 if (argc != 1 && argc != 2)
125 ifindex = (u_short)if_nametoindex(argv[0]);
128 if (argc == 2 && inet_pton(AF_INET6, argv[1], &maddr) != 1)
131 if ((s = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0)
134 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hlim,
136 err(1, "setsockopt(IPV6_MULTICAST_HOPS)");
138 mreq.ipv6mr_multiaddr = any;
139 mreq.ipv6mr_interface = ifindex;
140 if (setsockopt(s, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq,
142 err(1, "setsockopt(IPV6_JOIN_GROUP)");
144 ICMP6_FILTER_SETBLOCKALL(&filt);
145 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_QUERY, &filt);
146 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REPORT, &filt);
147 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REDUCTION, &filt);
148 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
150 err(1, "setsockopt(ICMP6_FILTER)");
152 make_msg(ifindex, &maddr, type);
154 if (sendmsg(s, &m, 0) < 0)
157 itimer.it_value.tv_sec = QUERY_RESPONSE_INTERVAL / 1000;
158 itimer.it_interval.tv_sec = 0;
159 itimer.it_interval.tv_usec = 0;
160 itimer.it_value.tv_usec = 0;
162 (void)signal(SIGALRM, quit);
163 (void)setitimer(ITIMER_REAL, &itimer, NULL);
167 errx(1, "descriptor too big");
170 if ((i = select(s + 1, &fdset, NULL, NULL, NULL)) < 0)
180 make_msg(int index, struct in6_addr *addr, u_int type)
182 static struct iovec iov[2];
183 static u_char *cmsgbuf;
184 int cmsglen, hbhlen = 0;
185 #ifdef USE_RFC2292BIS
186 void *hbhbuf = NULL, *optp = NULL;
189 u_int8_t raopt[IP6OPT_RTALERT_LEN];
191 struct in6_pktinfo *pi;
192 struct cmsghdr *cmsgp;
193 u_short rtalert_code = htons(IP6OPT_RTALERT_MLD);
194 struct ifaddrs *ifa, *ifap;
197 dst.sin6_len = sizeof(dst);
198 dst.sin6_family = AF_INET6;
199 if (IN6_IS_ADDR_UNSPECIFIED(addr)) {
200 if (inet_pton(AF_INET6, "ff02::1", &dst.sin6_addr) != 1)
201 errx(1, "inet_pton failed");
204 dst.sin6_addr = *addr;
205 m.msg_name = (caddr_t)&dst;
206 m.msg_namelen = dst.sin6_len;
207 iov[0].iov_base = (caddr_t)&mldh;
208 iov[0].iov_len = sizeof(mldh);
212 bzero(&mldh, sizeof(mldh));
213 mldh.mld_type = type & 0xff;
214 mldh.mld_maxdelay = htons(QUERY_RESPONSE_INTERVAL);
215 mldh.mld_addr = *addr;
217 /* MLD packet should be advertised from linklocal address */
219 for (ifap = ifa; ifap; ifap = ifap->ifa_next) {
220 if (index != if_nametoindex(ifap->ifa_name))
223 if (ifap->ifa_addr->sa_family != AF_INET6)
225 if (!IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
226 ifap->ifa_addr)->sin6_addr))
231 errx(1, "no linkocal address is available");
232 memcpy(&src, &((struct sockaddr_in6 *)ifap->ifa_addr)->sin6_addr,
236 /* remove embedded ifindex */
237 src.s6_addr[2] = src.s6_addr[3] = 0;
240 #ifdef USE_RFC2292BIS
241 if ((hbhlen = inet6_opt_init(NULL, 0)) == -1)
242 errx(1, "inet6_opt_init(0) failed");
243 if ((hbhlen = inet6_opt_append(NULL, 0, hbhlen, IP6OPT_ROUTER_ALERT, 2,
245 errx(1, "inet6_opt_append(0) failed");
246 if ((hbhlen = inet6_opt_finish(NULL, 0, hbhlen)) == -1)
247 errx(1, "inet6_opt_finish(0) failed");
248 cmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) + CMSG_SPACE(hbhlen);
250 hbhlen = sizeof(raopt);
251 cmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
252 inet6_option_space(hbhlen);
255 if ((cmsgbuf = malloc(cmsglen)) == NULL)
256 errx(1, "can't allocate enough memory for cmsg");
257 cmsgp = (struct cmsghdr *)cmsgbuf;
258 m.msg_control = (caddr_t)cmsgbuf;
259 m.msg_controllen = cmsglen;
260 /* specify the outgoing interface */
261 cmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
262 cmsgp->cmsg_level = IPPROTO_IPV6;
263 cmsgp->cmsg_type = IPV6_PKTINFO;
264 pi = (struct in6_pktinfo *)CMSG_DATA(cmsgp);
265 pi->ipi6_ifindex = index;
266 memcpy(&pi->ipi6_addr, &src, sizeof(pi->ipi6_addr));
267 /* specifiy to insert router alert option in a hop-by-hop opt hdr. */
268 cmsgp = CMSG_NXTHDR(&m, cmsgp);
269 #ifdef USE_RFC2292BIS
270 cmsgp->cmsg_len = CMSG_LEN(hbhlen);
271 cmsgp->cmsg_level = IPPROTO_IPV6;
272 cmsgp->cmsg_type = IPV6_HOPOPTS;
273 hbhbuf = CMSG_DATA(cmsgp);
274 if ((currentlen = inet6_opt_init(hbhbuf, hbhlen)) == -1)
275 errx(1, "inet6_opt_init(len = %d) failed", hbhlen);
276 if ((currentlen = inet6_opt_append(hbhbuf, hbhlen, currentlen,
277 IP6OPT_ROUTER_ALERT, 2,
279 errx(1, "inet6_opt_append(currentlen = %d, hbhlen = %d) failed",
281 (void)inet6_opt_set_val(optp, 0, &rtalert_code, sizeof(rtalert_code));
282 if ((currentlen = inet6_opt_finish(hbhbuf, hbhlen, currentlen)) == -1)
283 errx(1, "inet6_opt_finish(buf) failed");
284 #else /* old advanced API */
285 if (inet6_option_init((void *)cmsgp, &cmsgp, IPV6_HOPOPTS))
286 errx(1, "inet6_option_init failed\n");
287 raopt[0] = IP6OPT_ROUTER_ALERT;
288 raopt[1] = IP6OPT_RTALERT_LEN - 2;
289 memcpy(&raopt[2], (caddr_t)&rtalert_code, sizeof(u_short));
290 if (inet6_option_append(cmsgp, raopt, 4, 0))
291 errx(1, "inet6_option_append failed\n");
301 struct sockaddr_in6 from;
302 int from_len = sizeof(from);
305 if ((i = recvfrom(s, buf, sizeof(buf), 0,
306 (struct sockaddr *)&from,
310 if (i < sizeof(struct mld_hdr)) {
311 printf("too short!\n");
315 mld = (struct mld_hdr *)buf;
317 printf("from %s, ", inet_ntop(AF_INET6, &from.sin6_addr,
318 ntop_buf, sizeof(ntop_buf)));
320 switch (mld->mld_type) {
321 case ICMP6_MEMBERSHIP_QUERY:
322 printf("type=Multicast Listener Query, ");
324 case ICMP6_MEMBERSHIP_REPORT:
325 printf("type=Multicast Listener Report, ");
327 case ICMP6_MEMBERSHIP_REDUCTION:
328 printf("type=Multicast Listener Done, ");
331 printf("addr=%s\n", inet_ntop(AF_INET6, &mld->mld_addr,
332 ntop_buf, sizeof(ntop_buf)));
338 quit(int signum __unused)
340 mreq.ipv6mr_multiaddr = any;
341 mreq.ipv6mr_interface = ifindex;
342 if (setsockopt(s, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq,
344 err(1, "setsockopt(IPV6_LEAVE_GROUP)");
352 (void)fprintf(stderr, "usage: mld6query ifname [addr]\n");