Re: [Doh] [Ext] Proposal to close off these threads

[Patrick McManus <[e-mail]>]

On Mon, Jun 11, 2018 at 8:54 AM, Tony Finch <[e-mail]> wrote:

> Patrick McManus <[e-mail]> wrote:
> >
> > There has a been a convincing case that a > 64KB axfr responses uses 2
> > wireformat records in TCP today and therefore won't fit in the DoH MTI
> > wireformat media type. AIUI that's not because its AXFR, but because it
> is
> > >64KB, right? At the same time tale convincingly argues he has plenty of
> > <64KB zones that only use one message and match our MTI fine.
>
> It's more complicated than that :-)
>
> Small zones can be transferred using multiple messages too.
>
>
it doesn't need to be more complicated. The mti wireformat is defined as
one message (or if its not - it should be clarified) that might be limited
to 64KB. I thought one message was already clear and we were debating the
64KB point.

so if you can't meet those constraints, you can't use that media format.
but its not inherently about the query type.


> "HTTP defines status code 406 for cases where the server cannot generate a
> > representation suitable for the client". We can probably just say that.
>
> My DoH server sends a 200 OK HTTP response containing a NOTIMP DNS
> response.
>
>
Personally, I think you're better off with the HTTP error in this case as
the problem is with finding a matching HTTP transport.