[Twisted-Python] Twisted.Names assistance with auth and additional sections

[Sean Leach]

Sweet!  That was it.  Explicitly creating the Resolver worked like a
charm (don't ask me why :)   ).  Thanks!

On 3/20/07, Jean-Paul Calderone <exarkun at divmod.com> wrote:
> On Tue, 20 Mar 2007 16:13:14 -0700, Sean Leach <kickdaddy at gmail.com> wrote:
> >Thanks Jean-Paul,
> >
> >I tried changing to queryUDP, and it just sits there, never sends out
> >a query (watching with tcpdump).  If I change it to _lookup, which it
> >looks like queryUDP calls, it sends the query, but like lookupAddress,
> >I don't get the additional and auth sections still...
> >
> >What is weird, when I do this
> >
> >deferred = resolver.queryUDP([Dns.Query(name, dns.IN, dns.A)])
> >
> >and I try and debug why it's hanging, I put a print in the
> >ResolverBase.queryUDP function right at the top, and it never prints.
> >
>
> The factoring here is a little weird.  Try creating a t.names.client.Resolver
> explicitly (just instantiate it with a servers list or a resolv.conf filename)
> and calling queryUDP on it (unless you were doing this already).  The
> createResolver function does some other stuff which might be getting in the
> way here, either of functioning or debugging.
>
> Here's an example (using t/conch/stdio.py):
>
>   >>> from twisted.names import dns, client
>   >>> r = client.Resolver(servers=[('198.41.0.4', 53)])
>   >>> d = r.queryUDP([dns.Query('google.com', dns.IN, dns.A)])
>   >>> d
>   <Deferred at 0xB78F072CL  current result: <twisted.names.dns.Message instance at 0xb79b6aec>>
>   >>> d.result
>   <twisted.names.dns.Message instance at 0xb79b6aec>
>   >>> d.result.authority
>   [<snip - a bunch of records>]
>   >>> d.result.additional
>   [<snip - a bunch of records>]
>   >>> d.result.answers
>   []
>   >>>
>
> Hope this helps things,
>
> Jean-Paul
>
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