1.\" $KAME: mld6query.8,v 1.5 2000/12/04 06:28:23 itojun Exp $ 2.\" 3.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the project nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" $FreeBSD: src/usr.sbin/mld6query/mld6query.8,v 1.1.1.1.2.5 2003/03/11 21:13:51 trhodes Exp $ 31.\" $DragonFly: src/usr.sbin/mld6query/mld6query.8,v 1.2 2003/06/17 04:29:57 dillon Exp $ 32.\" 33.Dd May 17, 1998 34.Dt MLD6QUERY 8 35.Os 36.\" 37.Sh NAME 38.Nm mld6query 39.Nd send multicast listener query 40.\" 41.Sh SYNOPSIS 42.Nm 43.Op Fl dr 44.Ar intface 45.Op Ar maddr 46.\" 47.Sh DESCRIPTION 48The 49.Nm 50utility sends an IPv6 multicast listener discovery (MLD) query packet toward 51the specified multicast address, 52.Ar maddr , 53toward interface 54.Ar intface . 55If you omit 56.Ar maddr , 57linklocal all nodes multicast address(ff02::1) is used. 58.Pp 59After sending a query, 60.Nm 61waits for replies for at most 10 seconds. 62If a reply is returned, 63.Nm 64prints it with its type and then waits for another reply. 65.Pp 66This program is provided only for debugging. 67It is not necessary for normal use. 68.Pp 69With 70.Fl d , 71.Nm 72will transmit MLD done packet instead of MLD query packet. 73With 74.Fl r , 75similarly, MLD report packet will be transmitted. 76.Fl dr 77options are for debugging purposes only. 78.\" 79.Sh RETURN VALUES 80The program exits with 0 on success, non-zero on failures. 81.\" 82.\" .Sh SEE ALSO 83.\" 84.Sh HISTORY 85The 86.Nm 87utility first appeared in WIDE/KAME IPv6 protocol stack kit. 88.Sh BUGS 89The 90.Nm 91utility does not take care of multicast addresses which have non link-local 92scope. 93