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.Dd Jan 4 2022
.Dt MQUERY 1
.Os
.Sh NAME
.Nm mquery
.Nd small query tool for multicast DNS
.Sh SYNOPSIS
.Nm mquery
.Op Fl hsv
.Op Fl i Ar IFACE
.Op Fl t Ar TYPE
.Op Fl w Ar SEC
.Op Ar NAME
.Sh DESCRIPTION
.Nm
is a companion tool to
.Xr mdnsd 8 ,
but can also be used stand-alone with other mDNS servers.  It formats
and sends mDNS service queries, similar to how
.Xr mdns-scan 1
works, but with a fraction of the usability.
.Pp
.Nm
runs on the system default interface, derived from the routing table.
To run on another interface, use the
.Fl i Ar IFACE
command line option.  It runs continuously monitoring for responses to
the initial query, by default
.Cm _services._dns-sd._udp.local.
.Pp
.Sh OPTIONS
This program follows the usual UNIX command line syntax. The options are
as follows:
.Bl -tag
.It Fl h
Print a bare bones help message and exits.
.It Fl i Ar IFACE
Interface to run query on, by default the system default interface is
used, derived from the routing table.
.Pp
Only available on Linux.
.It Fl s
By default
.Nm
behaves a lot like
.Xr mdns-scan 1 ,
which after receiving an initial reply to a scan, sends a specific PTR
query to the respondent.  This option skips that specific scan and runs
.Nm
in a simple mode.
.It Fl t Ar TYPE
Query type, default 12 (PTR).
.It Fl h
Print a help message and exit.
.It Fl v
Show program version.
.It Fl w Ar SEC
Delay (approximate) in seconds before automatically exiting.
.El
.Sh SEE ALSO
.Xr mdns-scan 1
.Xr mdnsd 8 ,
.Sh AUTHORS
This mDNS-SD implementation was created in 2003 by
.An Jeremie Miller Aq jer@jabber.org .
Much later, in 2016, it was adopted by
.An Joachim Wiberg Aq troglobit@gmail.com
for further development and maintenance at GitHub:
.Aq https://github.com/troglobit/mdnsd .