I guess our replies overlapped.
Francois Audet wrote:
My take on this is that Juha is right and the document should really say:
If the UAC is sending a dialog-forming request, and wants all
subsequent requests in the dialog to arrive over the same
flow, the UAC MUST add an 'ob' parameter to its Contact header.
[ DELETE NEXT SENTENCE ENTIRELY ]
In other words, GRUU is orthogonal and does NOT imply "ob" behavior.
Not quite. If you have obtained a gruu after registering a contact with
outbound, you don't have to put "ob" on the gruu. It wouldn't help,
since it would get lost in the process of translating the gruu.
Thanks,
Paul
Clean and simple, and I *think* this was our intent (i.e., I think
this is an historical oversight).
Cullen, can you confirm or clarify?
-----Original Message-----
From: Dean Willis [mailto:[EMAIL PROTECTED]
Sent: Thursday, October 02, 2008 15:56
To: Paul Kyzivat
Cc: Audet, Francois (SC100:3055); Cullen Jennings; Rohan
Mahy; [email protected]
Subject: Re: [Sip] configuration NOTIFY in example 9.1 of outbound i-d
On Sep 29, 2008, at 3:26 PM, Paul Kyzivat wrote:
Francois Audet wrote:
Section 4.3 states (UA procedures):
If the UAC is sending a dialog-forming request, and wants all
subsequent requests in the dialog to arrive over the same
flow, the
UAC adds an 'ob' parameter to its Contact header. Typically
this is
desirable, but it is not necessary for example if the Contact
is a
GRUU [I-D.ietf-sip-gruu].
if contact is gruu, does it mean that 'ob' param is implicitly
included?
I am not sure why this is worded like this. I was thinking
that using
a GRUU as a contact in a dialog-forming request would mandate that
requests sent to that Contact would be sent using the same
flow, but
I see no such rule in draft-ietf-sip-gruu.
Gruu isn't dependent on outbound.
So explain this one for me, please.
Is it that, if the gruu was formed using outbound (that is,
the "real"
contact for which the gruu is an alias has an "ob") use of
the gruu will use the "ob" in the dereferencing at the gruu-provider?
So for the example referenced above may be correct, but
incomplete -- it should talk about whether or not the gruu
was formed using outbound, not just whether or not the
contact isa gruu.
--
Dean
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