Re: [DNSOP] Where in a CNAME chain is the QNAME?

[Shumon Huque <[e-mail]>]

On Thu, Sep 29, 2016 at 10:36 AM, Paul Hoffman <[e-mail]>
wrote:

> On 28 Sep 2016, at 22:50, Robert Edmonds wrote:
>
> Stephane Bortzmeyer wrote:
>>
>>> On Mon, Sep 26, 2016 at 09:04:54AM -0400,
>>>  Matt Larson <[e-mail]> wrote
>>>  a message of 41 lines which said:
>>>
>>> I'd venture that more people familiar with the subject matter would
>>>> define QNAME as the name in the question section of a DNS message.
>>>> (That's my sense of the definition, FWIW.)
>>>>
>>>
>>> What about adding this text to the Terminology section of the draft?
>>>
>>>    <t>"QNAME": it is defined in <xref target="RFC1034"/> and
>>>    in <xref target="RFC1035"/>, section 4.1.2, but, because <xref
>>>    target="RFC2308"/> provides a different definition, we repeat the
>>>    original one here: the QNAME is the owner name of the record in the
>>>    Question section.</t>
>>>
>>
>> The QNAME is a domain name, but is it an owner name? There is no owned
>> record data in the question section (and the entries in the question
>> section are not RRs).
>>
>
> Oddly, "owner name" is correct here. From RFC 1035, Section 3.2.1 which
> describes the format of resource records:
>
> All RRs have the same top level format shown below:
>
>                                     1  1  1  1  1  1
>       0  1  2  3  4  5  6  7  8  9  0  1  2  3  4  5
>     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
>     |                                               |
>     /                                               /
>     /                      NAME                     /
>     |                                               |
>     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
>     |                      TYPE                     |
>     +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
> . . .
>
> where:
>
> NAME            an owner name, i.e., the name of the node to which this
>                 resource record pertains.
>

Yes, Owner name is defined in terms of a resource record, i.e. the domain
name that owns a resource record.

But the question section has no resource record. It has 3 components of a
potential resource record.

-- 
Shumon Huque