Counters for DNS transports?

[Havard Eidnes]

Hi,

I recently had reason to enable BIND 9.18.27 to do DoT and DoH
(done via unbound earlier), and it all appears to work well so
far.

I have configured

statistics-channels {
        inet 127.0.0.1 port 8053 allow { 127.0.0.1; };
        inet <local-address> port 8053 allow { blah; };
};

The former for collection of monitoring data using collectd, the
latter for interactive inspection.

However, I was somewhat surprised that there does not appear to
exist any stats counter couting the number of queries received
per transport, to make it possible to monitor and distinguish
between "via UDP/53", "via TCP/53" and "via TLS" or "via HTTPS".
Is this a missing feature?

I've not checked, but does perhaps BIND 9.19.x have an
improvement over 9.18 in this aspect?

Regards,

- Håvard