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mld6query: throw IPv6 MLD query (similar to IPv4 IGMP)

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This commit is contained in:
itojun 1999-07-06 13:32:01 +00:00
parent 26c3d764fd
commit a7d1c8590c
4 changed files with 340 additions and 2 deletions
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5
usr.sbin/Makefile
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@ -1,4 +1,4 @@
# $NetBSD: Makefile,v 1.116 1999/07/02 17:41:23 itojun Exp $
# $NetBSD: Makefile,v 1.117 1999/07/06 13:32:01 itojun Exp $
# from: @(#)Makefile 5.20 (Berkeley) 6/12/93
# XXX Temporary for NO_SENDMAIL and BUILD_POSTFIX
@ -22,7 +22,8 @@ SUBDIR= ac accton amd apm apmd arp bad144 bind bootp catman \
zdump zic
# IPv6
SUBDIR+=gifconfig ifmcstat ndp rip6query route6d rtadvd setkey traceroute6
SUBDIR+=gifconfig ifmcstat mld6query ndp rip6query route6d rtadvd setkey \
traceroute6
.if !defined(NO_SENDMAIL)
SUBDIR+= sendmail

12
usr.sbin/mld6query/Makefile Normal file
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@ -0,0 +1,12 @@
# $NetBSD: Makefile,v 1.1 1999/07/06 13:32:01 itojun Exp $
PROG= mld6query
SRCS= mld6.c
MAN= mld6query.8
BINOWN = root
BINGRP = bin
CPPFLAGS+= -DINET6 -DIPSEC
.include <bsd.prog.mk>

248
usr.sbin/mld6query/mld6.c Normal file
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@ -0,0 +1,248 @@
/* $NetBSD: mld6.c,v 1.1 1999/07/06 13:32:01 itojun Exp $ */
/*
* Copyright (C) 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <net/if.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <net/if_var.h>
#endif /* __FreeBSD__ >= 3 */
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet/icmp6.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <err.h>
struct msghdr m;
struct sockaddr_in6 dst;
struct mld6_hdr mldh;
struct in6_addr maddr = IN6ADDR_ANY_INIT, any = IN6ADDR_ANY_INIT;
struct ipv6_mreq mreq;
u_short ifindex;
int s;
#define QUERY_RESPONSE_INTERVAL 10000
void make_msg(int index, struct in6_addr *addr);
void usage(void);
void dump(int);
void quit(int);
int
main(int argc, char *argv[])
{
int i;
struct icmp6_filter filt;
u_int hlim = 1;
fd_set fdset;
struct itimerval itimer;
if (argc != 2 && argc != 3)
usage();
ifindex = (u_short)if_nametoindex(argv[1]);
if (ifindex == 0)
usage();
if (argc == 3 && inet_pton(AF_INET6, argv[2], &maddr) != 1)
usage();
if ((s = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0)
err(1, "socket");
if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hlim,
sizeof(hlim)) == -1)
err(1, "setsockopt(IPV6_MULTICAST_HOPS)");
mreq.ipv6mr_multiaddr = any;
mreq.ipv6mr_interface = ifindex;
if (setsockopt(s, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq,
sizeof(mreq)) == -1)
err(1, "setsockopt(IPV6_JOIN_GROUP)");
ICMP6_FILTER_SETBLOCKALL(&filt);
ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_QUERY, &filt);
ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REPORT, &filt);
ICMP6_FILTER_SETPASS(ICMP6_MEMBERSHIP_REDUCTION, &filt);
if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
sizeof(filt)) < 0)
err(1, "setsockopt(ICMP6_FILTER)");
make_msg(ifindex, &maddr);
if (sendmsg(s, &m, 0) < 0)
err(1, "sendmsg");
itimer.it_value.tv_sec = QUERY_RESPONSE_INTERVAL / 1000;
itimer.it_interval.tv_sec = 0;
itimer.it_interval.tv_usec = 0;
itimer.it_value.tv_usec = 0;
(void)signal(SIGALRM, quit);
(void)setitimer(ITIMER_REAL, &itimer, NULL);
FD_ZERO(&fdset);
for (;;) {
FD_SET(s, &fdset);
if ((i = select(s + 1, &fdset, NULL, NULL, NULL)) < 0)
perror("select");
if (i == 0)
continue;
else
dump(s);
}
}
void
make_msg(int index, struct in6_addr *addr)
{
static struct iovec iov[2];
static u_char *cmsgbuf;
int cmsglen;
u_int8_t raopt[IP6OPT_RTALERT_LEN];
struct in6_pktinfo *pi;
struct cmsghdr *cmsgp;
u_short rtalert_code = htons(IP6OPT_RTALERT_MLD);
dst.sin6_len = sizeof(dst);
dst.sin6_family = AF_INET6;
if (IN6_IS_ADDR_UNSPECIFIED(addr)) {
if (inet_pton(AF_INET6, "ff02::1", &dst.sin6_addr) != 1)
errx(1, "inet_pton failed");
}
else
dst.sin6_addr = *addr;
m.msg_name = (caddr_t)&dst;
m.msg_namelen = dst.sin6_len;
iov[0].iov_base = (caddr_t)&mldh;
iov[0].iov_len = sizeof(mldh);
m.msg_iov = iov;
m.msg_iovlen = 1;
bzero(&mldh, sizeof(mldh));
mldh.mld6_type = MLD6_LISTENER_QUERY;
mldh.mld6_maxdelay = htons(QUERY_RESPONSE_INTERVAL);
mldh.mld6_addr = *addr;
cmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
inet6_option_space(sizeof(raopt));
if ((cmsgbuf = malloc(cmsglen)) == NULL)
errx(1, "can't allocate enough memory for cmsg");
cmsgp = (struct cmsghdr *)cmsgbuf;
m.msg_control = (caddr_t)cmsgbuf;
m.msg_controllen = cmsglen;
/* specify the outgoing interface */
cmsgp->cmsg_len = CMSG_SPACE(sizeof(struct in6_pktinfo));
cmsgp->cmsg_level = IPPROTO_IPV6;
cmsgp->cmsg_type = IPV6_PKTINFO;
pi = (struct in6_pktinfo *)CMSG_DATA(cmsgp);
pi->ipi6_ifindex = ifindex;
memset(&pi->ipi6_addr, 0, sizeof(pi->ipi6_addr));
/* specifiy to insert router alert option in a hop-by-hop opt hdr. */
cmsgp = CMSG_NXTHDR(&m, cmsgp);
if (inet6_option_init((void *)cmsgp, &cmsgp, IPV6_HOPOPTS))
errx(1, "inet6_option_init failed\n");
raopt[0] = IP6OPT_RTALERT;
raopt[1] = IP6OPT_RTALERT_LEN - 2;
memcpy(&raopt[2], (caddr_t)&rtalert_code, sizeof(u_short));
if (inet6_option_append(cmsgp, raopt, 4, 0))
errx(1, "inet6_option_append failed\n");
}
void
dump(int s)
{
int i;
struct mld6_hdr *mld;
u_char buf[1024];
struct sockaddr_in6 from;
int from_len = sizeof(from);
char ntop_buf[256];
if ((i = recvfrom(s, buf, sizeof(buf), 0,
(struct sockaddr *)&from,
&from_len)) < 0)
return;
if (i < sizeof(struct mld6_hdr)) {
printf("too short!\n");
return;
}
mld = (struct mld6_hdr *)buf;
printf("from %s, ", inet_ntop(AF_INET6, &from.sin6_addr,
ntop_buf, sizeof(ntop_buf)));
switch (mld->mld6_type) {
case ICMP6_MEMBERSHIP_QUERY:
printf("type=Multicast Listener Query, ");
break;
case ICMP6_MEMBERSHIP_REPORT:
printf("type=Multicast Listener Report, ");
break;
case ICMP6_MEMBERSHIP_REDUCTION:
printf("type=Multicast Listener Done, ");
break;
}
printf("addr=%s\n", inet_ntop(AF_INET6, &mld->mld6_addr,
ntop_buf, sizeof(ntop_buf)));
fflush(stdout);
}
void
quit(int signum) {
mreq.ipv6mr_multiaddr = any;
mreq.ipv6mr_interface = ifindex;
if (setsockopt(s, IPPROTO_IPV6, IPV6_LEAVE_GROUP, &mreq,
sizeof(mreq)) == -1)
err(1, "setsockopt(IPV6_LEAVE_GROUP)");
exit(0);
}
void
usage()
{
(void)fprintf(stderr, "usage: mld6query ifname [addr]\n");
exit(1);
}

77
usr.sbin/mld6query/mld6query.8 Normal file
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@ -0,0 +1,77 @@
.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the project nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $NetBSD: mld6query.8,v 1.1 1999/07/06 13:32:01 itojun Exp $
.\" KAME Id: mld6query.8,v 1.1.2.6 1998/12/03 01:54:41 itojun Exp
.\"
.Dd May 17, 1998
.Dt MLD6QUERY 8
.Os
.\"
.Sh NAME
.Nm mld6query
.Nd send multicast listener query
.\"
.Sh SYNOPSIS
.Nm
.Ar intface
.Op Ar maddr
.\"
.Sh DESCRIPTION
.Nm
sends an IPv6 multicast listener discovery (MLD) query packet toward
the specified multicast address,
.Ar maddr ,
toward interface
.Ar intface .
If you omit
.Ar maddr ,
linklocal multicast address(ff02::1) is used.
.Pp
After sending a query,
.Nm
waits for replies for at most 10 seconds.
If a reply is returned,
.Nm
prints it with its type and then waits for another reply.
.Pp
This program is provided only for debugging.
It is not necessary for normal use.
.\"
.Sh RETURN VALUES
The program exits with 0 on success, non-zero on failures.
.\"
.\" .Sh SEE ALSO
.\"
.Sh HISTORY
The
.Nm
command first appeared in WIDE/KAME IPv6 protocol stack kit.
.Sh BUGS
.Nm Mld6query
does not take care of multicast addresses which have non link-local
scope.