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.\" $FreeBSD$ 31.\" 32.Dd May 17, 1998 33.Dt MLD6QUERY 8 34.Os 35.\" 36.Sh NAME 37.Nm mld6query 38.Nd send multicast listener query 39.\" 40.Sh SYNOPSIS 41.Nm 42.Op Fl dgr 43.Ar intface 44.Op Ar maddr 45.\" 46.Sh DESCRIPTION 47The 48.Nm 49utility sends an IPv6 multicast listener discovery (MLD) query packet toward 50the specified multicast address, 51.Ar maddr , 52toward interface 53.Ar intface . 54If you omit 55.Ar maddr , 56linklocal all nodes multicast address(ff02::1) is used. 57.Pp 58After sending a query, 59.Nm 60waits for replies for at most 10 seconds. 61If a reply is returned, 62.Nm 63prints it with its type and then waits for another reply. 64.Pp 65This program is provided only for debugging. 66It is not necessary for normal use. 67.Pp 68With 69.Fl g , 70.Nm 71will transmit a General Query instead of the default Multicast-Address-Specific Query. 72With 73.Fl d , 74.Nm 75will transmit MLD done packet instead of MLD query packet. 76With 77.Fl r , 78similarly, MLD report packet will be transmitted. 79.Fl dr 80options are for debugging purposes only. 81.\" 82.Sh EXIT STATUS 83The program exits with 0 on success, non-zero on failures. 84.\" 85.\" .Sh SEE ALSO 86.\" 87.Sh HISTORY 88The 89.Nm 90utility first appeared in WIDE/KAME IPv6 protocol stack kit. 91.Sh BUGS 92The 93.Nm 94utility does not take care of multicast addresses which have non link-local 95scope. 96