RE: [Sip] refer-06 question

[hisham.khartabil@nokia.com]

I guess it all depends on how you define "immediate" to mean. If its a matter of seconds, then I think its ok to send the one NOTIFY only.

I quote RFC3165

"Until the first NOTIFY message arrives, the subscriber
   should consider the state of the subscribed resource to be in a
   neutral state.  Documents which define new event packages MUST define
   this "neutral state" in such a way that makes sense for their
   application (see section 4.4.7.)."

Regards,
Hisham

> -----Original Message-----
> From: ext Vijay S Kamath [mailto:vijay.kamath@wipro.com]
> Sent: Friday, July 26, 2002 3:25 PM
> To: patrick.mourot@online.fr
> Cc: sip@ietf.org
> Subject: RE: [Sip] refer-06 question
> 
> 
> Patrick,
> 
> You cannot delay the notification until the referenced 
> request completes.
> Quoting Sec 2.4.4: "The creation of a subscription as defined 
> by [1] always results in an
> immediate NOTIFY. "
> 
> So I suggest you follow your second suggestion.
> 
> Vijay
> 
> -----Original Message-----
> From: patrick.mourot@online.fr [mailto:patrick.mourot@online.fr] 
> Sent: Friday, July 26, 2002 5:24 PM
> To: Vijay Kamath
> Cc: sip@ietf.org
> Subject: RE: [Sip] refer-06 question
> 
> 
> vsk,
> 
> Thanks for the answer.
> I understand both cases; but this does not light my way.
> Let me put it in other words.
> 
> can i delay the notification until the referenced request 
> completes? leading to send only 1 notification???? (assuming 
> timers are OK).
> 
> Or am i oblige to send a 1rst notification, wait for 
> completion of the 
> referenced request and send a final notification ?
> 
> What is mandatory?
> 
> Patrick
> 
> 
> Quoting Vijay S Kamath <vijay.kamath@wipro.com>:
> 
> > It can be either 1 or more, but at least 1.
> > Qouting Section 2.4.7: "Each NOTIFY must contain a 
> Subscription-State 
> > header field as defined
> >    in [2].  The final NOTIFY sent in response to a REFER 
> MUST indicate
> >    the subscription has been "terminated" with a reason of 
> > "noresource"."
> > 
> > The final NOTIFY can also be the first NOTIFY.
> > 
> > Regards... Vijay
> > 
> > -----Original Message-----
> > From: patrick.mourot@online.fr [mailto:patrick.mourot@online.fr]
> > Sent: Friday, July 26, 2002 2:48 PM
> > To: sip@ietf.org
> > Subject: [Sip] refer-06 question
> > 
> > 
> > Sir,
> > 
> > 
> > In 2.4.5 § of refer-06 draft It is stated that a "A minimal, but 
> > complete, implementation can respond with a single NOTIFY 
> containing 
> > either ...the
> > body:
> > SIP/2.0 200 OK if the reference was successful".
> > 
> > It seems to be in contradiction with § 3.10 saying that 
> > "Alternatively, the subscription might only result in two NOTIFY 
> > requests, the immediate NOTIFY and
> > the NOTIFY carrying the final result of the reference".
> > 
> > Do we need 1 or 2 NOTIFY in a minimal implementation?
> > 
> > Best Regards,
> > 
> > Patrick
> > 
> > _______________________________________________
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> 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
> 

_______________________________________________
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This list is for NEW development of the core SIP Protocol
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