1 /* $KAME: mld6.c,v 1.11 2001/05/13 15:45:07 suz Exp $ */
4 * Copyright (C) 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * $FreeBSD: src/usr.sbin/mld6query/mld6.c,v 1.1.1.1.2.2 2001/07/03 11:02:06 ume Exp $
32 * $DragonFly: src/usr.sbin/mld6query/mld6.c,v 1.4 2004/12/18 22:48:04 swildner Exp $
34 #include <sys/param.h>
36 #include <sys/socket.h>
37 #include <sys/types.h>
43 #include <net/if_var.h>
45 #include <netinet/in.h>
46 #include <netinet/ip6.h>
47 #include <netinet/icmp6.h>
49 #include <arpa/inet.h>
57 struct sockaddr_in6 dst;
59 struct in6_addr maddr = IN6ADDR_ANY_INIT, any = IN6ADDR_ANY_INIT;
60 struct ipv6_mreq mreq;
64 #define QUERY_RESPONSE_INTERVAL 10000
66 void make_msg(int index, struct in6_addr *addr, u_int type);
72 main(int argc, char *argv[])
75 struct icmp6_filter filt;
78 struct itimerval itimer;
82 type = MLD6_LISTENER_QUERY;
83 while ((ch = getopt(argc, argv, "dr")) != -1) {
86 type = MLD6_LISTENER_DONE;
89 type = MLD6_LISTENER_REPORT;
100 if (argc != 1 && argc != 2)
103 ifindex = (u_short)if_nametoindex(argv[0]);
106 if (argc == 2 && inet_pton(AF_INET6, argv[1], &maddr) != 1)
109 if ((s = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0)
112 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hlim,
114 err(1, "setsockopt(IPV6_MULTICAST_HOPS)");
116 mreq.ipv6mr_multiaddr = any;
117 mreq.ipv6mr_interface = ifindex;
118 if (setsockopt(s, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq,
120 err(1, "setsockopt(IPV6_JOIN_GROUP)");
122 ICMP6_FILTER_SETBLOCKALL(&filt);
123 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_QUERY, &filt);
124 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REPORT, &filt);
125 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REDUCTION, &filt);
126 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
128 err(1, "setsockopt(ICMP6_FILTER)");
130 make_msg(ifindex, &maddr, type);
132 if (sendmsg(s, &m, 0) < 0)
135 itimer.it_value.tv_sec = QUERY_RESPONSE_INTERVAL / 1000;
136 itimer.it_interval.tv_sec = 0;
137 itimer.it_interval.tv_usec = 0;
138 itimer.it_value.tv_usec = 0;
140 signal(SIGALRM, quit);
141 setitimer(ITIMER_REAL, &itimer, NULL);
146 if ((i = select(s + 1, &fdset, NULL, NULL, NULL)) < 0)
156 make_msg(int index, struct in6_addr *addr, u_int type)
158 static struct iovec iov[2];
159 static u_char *cmsgbuf;
160 int cmsglen, hbhlen = 0;
161 u_int8_t raopt[IP6OPT_RTALERT_LEN];
162 struct in6_pktinfo *pi;
163 struct cmsghdr *cmsgp;
164 u_short rtalert_code = htons(IP6OPT_RTALERT_MLD);
166 dst.sin6_len = sizeof(dst);
167 dst.sin6_family = AF_INET6;
168 if (IN6_IS_ADDR_UNSPECIFIED(addr)) {
169 if (inet_pton(AF_INET6, "ff02::1", &dst.sin6_addr) != 1)
170 errx(1, "inet_pton failed");
173 dst.sin6_addr = *addr;
174 m.msg_name = (caddr_t)&dst;
175 m.msg_namelen = dst.sin6_len;
176 iov[0].iov_base = (caddr_t)&mldh;
177 iov[0].iov_len = sizeof(mldh);
181 bzero(&mldh, sizeof(mldh));
182 mldh.mld6_type = type & 0xff;
183 mldh.mld6_maxdelay = htons(QUERY_RESPONSE_INTERVAL);
184 mldh.mld6_addr = *addr;
186 hbhlen = sizeof(raopt);
187 cmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
188 inet6_option_space(hbhlen);
190 if ((cmsgbuf = malloc(cmsglen)) == NULL)
191 errx(1, "can't allocate enough memory for cmsg");
192 cmsgp = (struct cmsghdr *)cmsgbuf;
193 m.msg_control = (caddr_t)cmsgbuf;
194 m.msg_controllen = cmsglen;
195 /* specify the outgoing interface */
196 cmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
197 cmsgp->cmsg_level = IPPROTO_IPV6;
198 cmsgp->cmsg_type = IPV6_PKTINFO;
199 pi = (struct in6_pktinfo *)CMSG_DATA(cmsgp);
200 pi->ipi6_ifindex = index;
201 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr));
202 /* specifiy to insert router alert option in a hop-by-hop opt hdr. */
203 cmsgp = CMSG_NXTHDR(&m, cmsgp);
204 if (inet6_option_init((void *)cmsgp, &cmsgp, IPV6_HOPOPTS))
205 errx(1, "inet6_option_init failed\n");
206 raopt[0] = IP6OPT_RTALERT;
207 raopt[1] = IP6OPT_RTALERT_LEN - 2;
208 memcpy(&raopt[2], (caddr_t)&rtalert_code, sizeof(u_short));
209 if (inet6_option_append(cmsgp, raopt, 4, 0))
210 errx(1, "inet6_option_append failed\n");
217 struct mld6_hdr *mld;
219 struct sockaddr_in6 from;
220 int from_len = sizeof(from);
223 if ((i = recvfrom(s, buf, sizeof(buf), 0,
224 (struct sockaddr *)&from,
228 if (i < sizeof(struct mld6_hdr)) {
229 printf("too short!\n");
233 mld = (struct mld6_hdr *)buf;
235 printf("from %s, ", inet_ntop(AF_INET6, &from.sin6_addr,
236 ntop_buf, sizeof(ntop_buf)));
238 switch (mld->mld6_type) {
239 case ICMP6_MEMBERSHIP_QUERY:
240 printf("type=Multicast Listener Query, ");
242 case ICMP6_MEMBERSHIP_REPORT:
243 printf("type=Multicast Listener Report, ");
245 case ICMP6_MEMBERSHIP_REDUCTION:
246 printf("type=Multicast Listener Done, ");
249 printf("addr=%s\n", inet_ntop(AF_INET6, &mld->mld6_addr,
250 ntop_buf, sizeof(ntop_buf)));
258 mreq.ipv6mr_multiaddr = any;
259 mreq.ipv6mr_interface = ifindex;
260 if (setsockopt(s, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq,
262 err(1, "setsockopt(IPV6_LEAVE_GROUP)");
270 fprintf(stderr, "usage: mld6query ifname [addr]\n");