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.Dd May 17, 1998 31.Dt MLD6QUERY 8 32.Os 33.\" 34.Sh NAME 35.Nm mld6query 36.Nd send multicast listener query 37.\" 38.Sh SYNOPSIS 39.Nm 40.Op Fl dgr 41.Ar intface 42.Op Ar maddr 43.\" 44.Sh DESCRIPTION 45The 46.Nm 47utility sends 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 g , 68.Nm 69will transmit a General Query instead of the default Multicast-Address-Specific Query. 70With 71.Fl d , 72.Nm 73will transmit MLD done packet instead of MLD query packet. 74With 75.Fl r , 76similarly, MLD report packet will be transmitted. 77.Fl dr 78options are for debugging purposes only. 79.\" 80.Sh EXIT STATUS 81The program exits with 0 on success, non-zero on failures. 82.\" 83.\" .Sh SEE ALSO 84.\" 85.Sh HISTORY 86The 87.Nm 88utility first appeared in WIDE/KAME IPv6 protocol stack kit. 89.Sh BUGS 90The 91.Nm 92utility does not take care of multicast addresses which have non link-local 93scope. 94