[SIPForum-discussion] Which should be the correct behaviour?

[DEEPAK SHARMA]

Hi Guys,

In Continuation to Robert's mail, i would agree to the point that SIP Phone
will get final response for both INVITE(C1) as well as CANCEL(D1).

As per my understanding, if it is similar to race conditions then both final
responses are to be generated.

For more details please have a look at *
http://tools.ietf.org/html/draft-ietf-sipping-race-examples-04
*
Please correct me if i am wrong...


On Wed, Apr 2, 2008 at 7:27 PM, Robert Sparks <rjsparks at nostrum.com> wrote:

> Its hard to tell from the attachment (a text description would be more
> list friendly), but I think you're askingwhether or not you are supposed
> to get both a 200 to the CANCEL and a final response to the INVITE at the
> originating phone? If that is your question, the answer is yes.
>
> CANCEL is a discrete transaction. It _always_ gets its own final response.
>
> Some other related notes for the list at large (since these questions
> usually show up on this list in a swarm)
> * CANCEL is a hop-by-hop transaction - The CANCEL and its final response
> will only have one Via header field (unless you have ->stateless<- proxies,
> but you probably don't).
> * The 200 OK to the CANCEL does not mean the request has been cancelled.
> It means the next hop  received the CANCEL request, has found the
> transaction to cancel and is willing to try. You learn whether or not the
> INVITE got cancelled in the final response to the INVITE. (If it was
> successfully cancelled, you'll see a 487 to the INVITE).
>
> RjS
>
> On Apr 2, 2008, at 7:31 AM, Andrea Puddu wrote:
>
>
>
> Sorry guys, my results were not correct because I have tried to use a
> simulator.
> Attached you can find a comparison between two different phones in the
> second scenario in a real case.
> I guess that the first behaviour is not correct, isn't it?
>
> Thanks everybody very much,
>
> Andrea
>
>
> ------------------------------
> From: androjoker at hotmail.com
> To: discussion at sipforum.org
> Date: Fri, 28 Mar 2008 11:10:21 +0000
> Subject: [SIPForum-discussion] Which should be the correct behaviour?
>
>
> Hello,
>
> does anybody know which should be the correct phone behaviour in these two
> scenarios?
> -          *Scenario 1*:
> SIP phone sends an INVITE (D1)
> SIP phone sends a CANCEL (C1)
> SIP phone receives C1 200 OK
> SIP phone receives D1 200 OK
>
>
> -          *Scenario 2*:
> SIP phone sends an INVITE (D1)
> SIP phone sends a CANCEL (C1)
> SIP phone DOES NOT receive C1 200 OK
> SIP phone receives D1 200 OK
>
>
> Thanks,
>
>
> Andrea
>
>
> <http://www.messenger.it>
>
>
> ------------------------------
> Windows Live Mail Tutta la tua posta in un solo posto! Scarica il
> programma <http://get.live.com/wlmail/overview> <shot_cdr.JPG>
> _______________________________________________
> This is the SIP Forum discussion mailing list
> TO UNSUBSCRIBE, or edit your delivery options, please visit
> http://sipforum.org/mailman/listinfo/discussion
> Post to the list at discussion at sipforum.org
>
>
>
> _______________________________________________
> This is the SIP Forum discussion mailing list
> TO UNSUBSCRIBE, or edit your delivery options, please visit
> http://sipforum.org/mailman/listinfo/discussion
> Post to the list at discussion at sipforum.org
>
>


-- 
Thanks
Deepak Sharma
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20080403/cbab56e5/attachment-0002.html>