[Dnsmasq-discuss] Dynamic address config?

[Feng Shao]

There are a bunch of machines in our lab, and we normally don't have DNS
records configured for them, only accessing by IP. In order to ssh to them
with key auth, I have a config in my .ssh/config like

Host *.mylab
  User root
  IdentityFile ~/.ssh/id_rsa.work

and I have some "address=/123.123.123.123.mylab/123.123.123.123" line in
dnsmasq.conf. The problem here is I need to add an entry whenever a new IP
comes.

Can this configuration be dynamically? For example,
"address=/*.mylab/somecmd %1", where "somecmd" is a external command and %1
will be replaced by the name in A/AAAA request. So that for any DNS request
to *.mylab, dnsmasq invoke this external command and pass the name as
argument, the output of external command, which will be interpreted as
IPv4/IPv6 addr then responsed to client?
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