At least from my perspective (which is from supporting the capabilities of the
ISDN User-to-User service) the answer is No. This is information above the SIP
layer in an application, and to look at the contents, one must come out above
the SIP layer into that application.
It could be conditional that the SIP message itself is not processed if the
information is not there, and the SIP request therefore rejected, but this has
nothing to do with the contents. And personally, I do not believe that bit will
every happen at a proxy, but will be at the recipient UA.
regards
Keith
-----Original Message-----
From: dispatch-bounces(_at_)ietf(_dot_)org
[mailto:dispatch-bounces(_at_)ietf(_dot_)org] On Behalf Of Cullen Jennings
Sent: Thursday, July 15, 2010 3:06 PM
To: Gonzalo Camarillo
Cc: DISPATCH list; IESG IESG; IETF-Discussion list
Subject: Re: [dispatch] WG Review: Call Control UUI for SIP (cuss)
I don't think this resolves the issue. The issue is if this
information is used for a call control. Basically do proxies
need to be able to look at this to make decision about what
they are going to do. We at least need a Yes/No answer to
this question from the proponents of this work and the
charter to make that clear.
On Jul 14, 2010, at 2:25 AM, Gonzalo Camarillo wrote:
Hi,
thanks for your comments on the charter proposal. Per the comments
received, we will modify bullet 5 as follows so that it is clearer:
OLD:
5. SIP elements may need to apply policy about passing and screening
the information.
NEW:
5. SIP elements may need to apply policy about passing and filtering
UUI. The included application, encoding, semantics, and content
information will allow endpoint or intermediary SIP elements to
allow or block UUI based on the type and originator, not based on
the actual UUI data, which may be end-to-end encrypted by the
application.
Further discussions on this topic should happen on the
mailing list of
this WG.
Cheers,
Gonzalo
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