[dns-operations] Using UDP length field for an id

Paul Vixie vixie at isc.org
Mon Oct 19 04:56:15 UTC 2009

not i.  any change of this kind requires a certain basic level of effort
which is very high.  for that level of effort i'd want more in return.


> Date: Sun, 18 Oct 2009 22:44:55 -0500
> From: John Kristoff <jtk at cymru.com>
> To: dns-operations at mail.dns-oarc.net
> X-Mailer: Claws Mail
> Subject: [dns-operations] Using UDP length field for an id
> Sender: dns-operations-bounces at lists.dns-oarc.net
> Would there be any interest in a version of UDP, like UDP-Lite, which
> is essentially UDP, but redefines the largely redundant length field in
> the UDP header?  The new version relevant to this group and DNS would
> be to use those 16 bits for an id field.  A hack for you know what.
> Yes, yes, I know - "DNSSEC!", but just wondering if anyone would even
> admit to consider using such a thing if it were available.  And yes I
> realize it would probably be at least a few years before it would show
> up in any stack, just asking.
> John
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