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 $
33 #include <sys/param.h>
35 #include <sys/socket.h>
36 #include <sys/types.h>
42 #include <net/if_var.h>
44 #include <netinet/in.h>
45 #include <netinet/ip6.h>
46 #include <netinet/icmp6.h>
48 #include <arpa/inet.h>
56 struct sockaddr_in6 dst;
58 struct in6_addr maddr = IN6ADDR_ANY_INIT, any = IN6ADDR_ANY_INIT;
59 struct ipv6_mreq mreq;
63 #define QUERY_RESPONSE_INTERVAL 10000
65 void make_msg(int index, struct in6_addr *addr, u_int type);
71 main(int argc, char *argv[])
74 struct icmp6_filter filt;
77 struct itimerval itimer;
81 type = MLD6_LISTENER_QUERY;
82 while ((ch = getopt(argc, argv, "dr")) != -1) {
85 type = MLD6_LISTENER_DONE;
88 type = MLD6_LISTENER_REPORT;
99 if (argc != 1 && argc != 2)
102 ifindex = (u_short)if_nametoindex(argv[0]);
105 if (argc == 2 && inet_pton(AF_INET6, argv[1], &maddr) != 1)
108 if ((s = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0)
111 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hlim,
113 err(1, "setsockopt(IPV6_MULTICAST_HOPS)");
115 mreq.ipv6mr_multiaddr = any;
116 mreq.ipv6mr_interface = ifindex;
117 if (setsockopt(s, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq,
119 err(1, "setsockopt(IPV6_JOIN_GROUP)");
121 ICMP6_FILTER_SETBLOCKALL(&filt);
122 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_QUERY, &filt);
123 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REPORT, &filt);
124 ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REDUCTION, &filt);
125 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
127 err(1, "setsockopt(ICMP6_FILTER)");
129 make_msg(ifindex, &maddr, type);
131 if (sendmsg(s, &m, 0) < 0)
134 itimer.it_value.tv_sec = QUERY_RESPONSE_INTERVAL / 1000;
135 itimer.it_interval.tv_sec = 0;
136 itimer.it_interval.tv_usec = 0;
137 itimer.it_value.tv_usec = 0;
139 (void)signal(SIGALRM, quit);
140 (void)setitimer(ITIMER_REAL, &itimer, NULL);
145 if ((i = select(s + 1, &fdset, NULL, NULL, NULL)) < 0)
155 make_msg(int index, struct in6_addr *addr, u_int type)
157 static struct iovec iov[2];
158 static u_char *cmsgbuf;
159 int cmsglen, hbhlen = 0;
160 u_int8_t raopt[IP6OPT_RTALERT_LEN];
161 struct in6_pktinfo *pi;
162 struct cmsghdr *cmsgp;
163 u_short rtalert_code = htons(IP6OPT_RTALERT_MLD);
165 dst.sin6_len = sizeof(dst);
166 dst.sin6_family = AF_INET6;
167 if (IN6_IS_ADDR_UNSPECIFIED(addr)) {
168 if (inet_pton(AF_INET6, "ff02::1", &dst.sin6_addr) != 1)
169 errx(1, "inet_pton failed");
172 dst.sin6_addr = *addr;
173 m.msg_name = (caddr_t)&dst;
174 m.msg_namelen = dst.sin6_len;
175 iov[0].iov_base = (caddr_t)&mldh;
176 iov[0].iov_len = sizeof(mldh);
180 bzero(&mldh, sizeof(mldh));
181 mldh.mld6_type = type & 0xff;
182 mldh.mld6_maxdelay = htons(QUERY_RESPONSE_INTERVAL);
183 mldh.mld6_addr = *addr;
185 hbhlen = sizeof(raopt);
186 cmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
187 inet6_option_space(hbhlen);
189 if ((cmsgbuf = malloc(cmsglen)) == NULL)
190 errx(1, "can't allocate enough memory for cmsg");
191 cmsgp = (struct cmsghdr *)cmsgbuf;
192 m.msg_control = (caddr_t)cmsgbuf;
193 m.msg_controllen = cmsglen;
194 /* specify the outgoing interface */
195 cmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
196 cmsgp->cmsg_level = IPPROTO_IPV6;
197 cmsgp->cmsg_type = IPV6_PKTINFO;
198 pi = (struct in6_pktinfo *)CMSG_DATA(cmsgp);
199 pi->ipi6_ifindex = index;
200 memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr));
201 /* specifiy to insert router alert option in a hop-by-hop opt hdr. */
202 cmsgp = CMSG_NXTHDR(&m, cmsgp);
203 if (inet6_option_init((void *)cmsgp, &cmsgp, IPV6_HOPOPTS))
204 errx(1, "inet6_option_init failed\n");
205 raopt[0] = IP6OPT_RTALERT;
206 raopt[1] = IP6OPT_RTALERT_LEN - 2;
207 memcpy(&raopt[2], (caddr_t)&rtalert_code, sizeof(u_short));
208 if (inet6_option_append(cmsgp, raopt, 4, 0))
209 errx(1, "inet6_option_append failed\n");
216 struct mld6_hdr *mld;
218 struct sockaddr_in6 from;
219 int from_len = sizeof(from);
222 if ((i = recvfrom(s, buf, sizeof(buf), 0,
223 (struct sockaddr *)&from,
227 if (i < sizeof(struct mld6_hdr)) {
228 printf("too short!\n");
232 mld = (struct mld6_hdr *)buf;
234 printf("from %s, ", inet_ntop(AF_INET6, &from.sin6_addr,
235 ntop_buf, sizeof(ntop_buf)));
237 switch (mld->mld6_type) {
238 case ICMP6_MEMBERSHIP_QUERY:
239 printf("type=Multicast Listener Query, ");
241 case ICMP6_MEMBERSHIP_REPORT:
242 printf("type=Multicast Listener Report, ");
244 case ICMP6_MEMBERSHIP_REDUCTION:
245 printf("type=Multicast Listener Done, ");
248 printf("addr=%s\n", inet_ntop(AF_INET6, &mld->mld6_addr,
249 ntop_buf, sizeof(ntop_buf)));
257 mreq.ipv6mr_multiaddr = any;
258 mreq.ipv6mr_interface = ifindex;
259 if (setsockopt(s, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq,
261 err(1, "setsockopt(IPV6_LEAVE_GROUP)");
269 (void)fprintf(stderr, "usage: mld6query ifname [addr]\n");