Re: [sip]Join header syntax related to RFC2543

石川　愛 wrote:
> Hi,
> 
> I have a question associated with draft-ietf-sip-join-03.txt 
> and draft-ietf-sip-replaces-05.txt.
> 
> 
> Join document at the tail of Section 7.1  saids:
> 
> For compatibility with dialogs initiated by RFC2543 [11] 
> compliant UAs, a tag of zero matches both tags of zero and null tags
> 
> Examples:
>       Join: 87134@192.0.2.23;to-tag=24796;from-tag=0　
> 
> and also said at section 6.1 in Replaces document.
> 
> 
> 
> In inverse case, i.e., there is a dialog initiated by RFC3261 
> compliant UAs to RFC2543 compliant UAs, is the same? 
> In other words, there is a possibility that there is 
> no to-tag in this case. So we can as below?
> 
> For example,
>       Join: 12345@192.1.2.3;to-tag=0;from-tag=56789
> 
> 
> In this example, does tag of zero matches both tags of zero 
> and null tags? And also for Replaces?

That's my reading of the doc, although in retrospect the wording at the
end of joing-7.1 is particularly clumsy, and I wish somebody had noticed
sooner.

I'd like to ask the authors to clarify here, and perhaps we can get an
errata entry with that clarification.

--
Dean

_______________________________________________
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