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RE: [Sip] NOTIFY establishes a dialog
Hi Hisham,
I'd posted the same question about setting dialog-state (route-set
etc.) and I got the following response:
<http://lists.cs.columbia.edu/pipermail/sip-implementors/2003-February/004569.html>
It says:
"RFC 3265 augments 3261, in that the dialog in this case can be created
either by a response to SUBSCRIBE or by NOTIFY".
So that would mean that the route-set could be constructed with
Route-headers (present in NOTIFY) also. Is this a correct assumption?
A word from the authors of the RFC on this would help bring more
clarity.
Regards
Ganesh
On Thu, 2003-03-20 at 04:17, hisham.khartabil@nokia.com wrote:
> I have a few related questions/comments:
>
> - A 180 response to a request (like INVITE) establishes a dialog. This 180 response carries record-route headers and therefore sets the route-set. The 200 response to the request might also carry record-route headers. The dialog transitions to confirmed state, but I assume the route-set does not get updated using the record-route headers in the 200 response since the dialog is established already. Is this a correct assumption? should the UAS send record-route headers at all in the 200 if it sent a 1xx already?
>
> Should there be a mandate that 1xx and 2xx response carry the same record-route headers? You would assume that this happens naturally at the UAS, but proxies may play around with the record-route headers.
>
> - In the NOTIFY problem below, the NOTIFY establishes the dialog, but does not carry record-route headers. If the same assumption is made as above, the record-route headers appearing in the 200 response to the SUBSCRIBE are ignored since the dialog is in established state. Isn't this a problem? the route-set is lost.
>
> I appreciate some clarifications.
>
> Regards,
> Hisham
>
>
> > -----Original Message-----
> > From: ext hisham.khartabil@nokia.com
> > [mailto:hisham.khartabil@nokia.com]
> > Sent: Wednesday, March 12, 2003 5:37 PM
> > To: sip@ietf.org
> > Subject: [Sip] NOTIFY establishes a dialog
> >
> >
> > In RFC3265, it is mentioned that NOTIFY can certainly
> > establish a dialog if it arrives before the 200 of a
> > SUBSCRIBE. What happens when the 200 for the SUBSCRIBE now
> > arrives with record-route headers? Does the route-set get
> > updated? (keeping in mind that the dialog is now in the
> > established state).
> >
> > Regards,
> > Hisham
> > _______________________________________________
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> > This list is for NEW development of the core SIP Protocol
> > Use sip-implementors@cs.columbia.edu for questions on current sip
> > Use sipping@ietf.org for new developments on the application of sip
> >
> _______________________________________________
> Sip mailing list https://www1.ietf.org/mailman/listinfo/sip
> This list is for NEW development of the core SIP Protocol
> Use sip-implementors@cs.columbia.edu for questions on current sip
> Use sipping@ietf.org for new developments on the application of sip
_______________________________________________
Sip mailing list https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip