[ldns-users] More info from drill -T

[Greg Ward]

Hi again --

drill -T is working great with the new "follow CNAMEs" feature --
thanks, Willem!

But I find myself wanting more info for two distinct reasons.

1) "nxdomain" errors are not obvious in trace mode. E.g.

   $ drill -T this-is-a-bogus-domain.net
   .       518400  IN      NS      c.root-servers.net.
   .       518400  IN      NS      h.root-servers.net.
   [...]
   net.    172800  IN      NS      j.gtld-servers.net.
   net.    172800  IN      NS      i.gtld-servers.net.
   [...]
   net.    900     IN      SOA     a.gtld-servers.net. nstld.verisign-grs.com. 1391037622 1800 900 604800 86400

   There's no explicit "NXDOMAIN" indicator, like you get from "drill" without -T.
   Increasing the verbosity doesn't help:

   $ drill -T -V5 this-is-a-bogus-domain.net | grep rcode:
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0
   ;; ->>HEADER<<- opcode: QUERY, rcode: NOERROR, id: 0

2) It's hard (impossible?) to tell how lines of output correspond to
   DNS query/response packets without using -V5, and that gives a
   flood of uninteresting additional data. (Including reverse lookups
   of some of the nameservers that we hit along the way!)

It appears that the ";; " lines that are useful with normal drill (and
dig) output are, ummm, not so useful in trace mode. Is this a known
bug? Or am I missing something (like, that's a feature)?

Thanks --

       Greg