1.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the project nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" $NetBSD: mld6query.8,v 1.2 1999/09/03 04:34:34 itojun Exp $ 29.\" KAME Id: mld6query.8,v 1.3 1999/08/20 10:00:06 itojun Exp 30.\" 31.Dd May 17, 1998 32.Dt MLD6QUERY 8 33.Os 34.\" 35.Sh NAME 36.Nm mld6query 37.Nd send multicast listener query 38.\" 39.Sh SYNOPSIS 40.Nm 41.Op Fl dr 42.Ar intface 43.Op Ar maddr 44.\" 45.Sh DESCRIPTION 46.Nm 47sends an IPv6 multicast listener discovery (MLD) query packet toward 48the specified multicast address, 49.Ar maddr , 50toward interface 51.Ar intface . 52If you omit 53.Ar maddr , 54linklocal all nodes multicast address(ff02::1) is used. 55.Pp 56After sending a query, 57.Nm 58waits for replies for at most 10 seconds. 59If a reply is returned, 60.Nm 61prints it with its type and then waits for another reply. 62.Pp 63This program is provided only for debugging. 64It is not necessary for normal use. 65.Pp 66With 67.Fl d , 68.Nm 69will transmit MLD done packet instead of MLD query packet. 70With 71.Fl r , 72similarly, MLD report packet will be transmitted. 73.Fl dr 74options are for debugging purposes only. 75.\" 76.Sh RETURN VALUES 77The program exits with 0 on success, non-zero on failures. 78.\" 79.\" .Sh SEE ALSO 80.\" 81.Sh HISTORY 82The 83.Nm 84command first appeared in WIDE/KAME IPv6 protocol stack kit. 85.Sh BUGS 86.Nm Mld6query 87does not take care of multicast addresses which have non link-local 88scope. 89