question about multiple queries in a single dns packet

[Federico Barbieri]

hmm.... not the answer I was hoping for but clear and final...

I've been interpreting
http://www.faqs.org/rfcs/rfc1035.html
and guessed that QDCOUNT could have been used that way.

will look for alternative solutions.

Thanks a lot guys for the quick reply.

fede



On Wed, Dec 29, 2010 at 11:52 PM, Michael Sinatra <
michael at rancid.berkeley.edu> wrote:

> On 12/29/10 14:06, Alan Clegg wrote:
>
>> On 12/29/2010 2:17 PM, Federico Barbieri wrote:
>>
>>> Not sure if this is the right place to ask but I've been trying to dig
>>> around and found nothing...
>>>
>>> reading the dns specification it would seems possible to send multiple
>>> request in a single packet.
>>>
>>
>> I'm not sure what the actual reference is, but "don't do that".
>>
>> Nobody supports it (what would the answer section contain?  what does
>> the RCODE actually mean?)...
>>
>
> I believe it's in the EDNS1 specification that Paul did a while back, after
> EDNS0.  I don't think it ever got advanced to RFC:
>
> http://tools.ietf.org/html/draft-ietf-dnsext-edns1-03
>
> See especially section 4.
>
> The answer to your question on RCODE:
>
>
> 4.2. RCODE and AA apply to all RRs in the answer section having the
>
>   QNAME that is shared by all questions in the question section.  AA
>   applies to all matching answers, and will not be set unless the exact
>   original request was processed by an authoritative server and the
>   response forwarded in its entirety.
>
> michael
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