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Re: [DNSOP] Alternate proposal for transport indication in draft-ietf-dnsop-dns-wireformat-http

Davey Song <songlinjian@gmail.com> Fri, 30 March 2018 08:53 UTC

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From: Davey Song <songlinjian@gmail.com>
Date: Fri, 30 Mar 2018 16:53:01 +0800
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To: Paul Hoffman <paul.hoffman@icann.org>
Cc: DoH WG <doh@ietf.org>, dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] Alternate proposal for transport indication in draft-ietf-dnsop-dns-wireformat-http
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Hi Paul,

It sounds reasonable as we discussed before.

Best regards,
Davey

On 26 March 2018 at 13:48, Paul Hoffman <paul.hoffman@icann.org> wrote:

> Given the use case in draft-ietf-dnsop-dns-wireformat-http, defining a
> new media type seems like overkill, particularly given that it will be
> transporting *the exact same* data as an existing media type. Instead, an
> optional parameter could be added to the application/dns-udpwireformat
> registration in the DOH document.
>
> Proposal:
>
> =====
>
> In the media type definition, change "Optional parameters" to:
>
> Optional parameters: original_transport
>    original_transport has two defined values, "udp" and "tcp".
>    This is only expected to be used by servers.
>
> Also in the the DOH document, under Operational Considerations, we would
> add:
>
> This protocol does not define any use for the original_transport optional
> parameter of the application/dns-udpwireformat media type.
>
> =====
>
> Then draft-ietf-dnsop-dns-wireformat-http could define the use of that
> optional parameter as it sees fit.
>
> --Paul Hoffman
>
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