Subject: Re: [dispatch] [Sipping] I-D Action:draft-kaplan-sipping-interop-bcp-02.txt

From: "Dale Worley" <[email-masked]>
Date: Fri, 17 Jul 2009 15:45:37 -0400

On Mon, 2009-07-13 at 02:00 -0400, Hadriel Kaplan wrote:
> p.s.  My guess is that it's not because they can't generate a 604
> physically, but rather that the systems can't consistently and
> programmatically know when it would be correct to do so.

That's exactly the problem -- a 604 doesn't mean "the request-URI cannot
be reached", it means "the request-URI of the *original* request cannot
be reached".  But the UAS cannot know the original request-URI, so it
can never validly generate any 6xx-class response.

See draft-worley-6xx-considered-harmful for a whine about this...

Dale