PATCH: dig warn user when querying ANY towards recursive server (fwd)

[Andris Kalnozols]

On 7/22/2012 10:19 AM, Paul Wouters wrote:
>
> (I don't think this made it to the list before, mixup of email addresses)
>
> Please consider including this patch,
>
> Paul
>
> ---------- Forwarded message ----------
> Date: Mon, 2 Jul 2012 17:45:08
> From: Paul Wouters <paul at nohats.ca>
> Cc: Paul Vixie <paul at redbarn.org>
> To: bind-users at lists.isc.org
> Subject: PATCH: dig warn user when querying ANY towards recursive server
>
>
> Hi,
>
> As recently came up, when querying a recursive caching server for ANY
> will only result on cached entries being returned, and not the whole
> possible set. For that you need to query the authoritative server.
>
> I wasn't aware of this, and since I'm sure I'll forget about this again
> too, I wrote a patch for dig to remind me. Please apply :)


Don't forget that recursive servers can also host the zone being
queried.  Testing for the "aa" flag makes the message more accurate.

>                         if ((query->lookup->rdtype == dns_rdatatype_any) &&
>                             ((msg->flags & DNS_MESSAGEFLAG_RA) != 0) &&
>                              (msg->flags & DNS_MESSAGEFLAG_AA) == 0)
>                                 printf("\n\n;; WARNING: Requested ANY data "
>                                        "from a non-authoritative recursive "
>                                        "server.\n;;          The cached answer "
>                                        "might be incomplete.\n\n");

------
Andris