Subject: Re: [Sip] [Sip-implementors] Question on CANCEL - backwards-compatibility

From: Jonathan Rosenberg <[email-masked]>
Date: Thu, 25 Apr 2002 02:29:43 -0400

"Fuxbruner, Amihay" wrote:
> 
> Does sending 200 OK is the formal meaning of no-op ?

The confusing word here is "behavior". In this context, it is meant to
refer to processing of this requet at layers above the transaction
layer. I agree it could be clearer. We will try to reword during authors
49 hours.

-Jonathan R.

> -----Original Message-----
> From: Ulrich Prakash [ mailto:[email-masked]
> <mailto:[email-masked]> ]
> Sent: Wednesday, March 20, 2002 9:46 PM
> To: Fuxbruner, Amihay; [email-masked]
> Subject: Re: [Sip-implementors] Question on CANCEL -
> backwards-compatibility
> 
> Hi,
> 
> please refer the following text from the draft.
> 
> Section 9.2 of bis-09, line 1497:
> If the original request was an INVITE,the UAS SHOULD immediately respond
> to the INVITE with a 487 (Request Terminated).
> 
> The behavior upon reception of a CANCEL request for any other method
> defined in this specification is effectively no-op.
> 
> Hence it should be a No operation.
> 
> Thanks,
> Prakash.
> 
> -----Original Message-----
> From: Jonathan Rosenberg [ mailto:[email-masked]
> <mailto:[email-masked]> ]
> Sent: Wednesday, March 20, 2002 6:59 PM
> To: Fuxbruner, Amihay
> Cc: [email-masked]
> Subject: Re: [Sip] Question on CANCEL - backwards-compatibility
> 
> "Fuxbruner, Amihay" wrote:
> >
> > Hi,
> >
> > Early bis drafts support CANCEL for any request.
> > How UAS (bis 09) should respond to CANCEL for none-INVITE request from
> 
> > UAC (early bis) ?
> >
> 
> Send a 200 OK and do nothing else. This is discussed in the final
> paragraph of 9.2 of bis, which reads:
> 
> Regardless of the method of the original request, as long as the CANCEL
> matched an existing transac- tion, the UAS answers the CANCEL request
> itself with a 200 (OK) response. This response is constructed 1501
> following the procedures described in Section 8.2.6 noting that the To
> tag of the response to the CANCEL 1502
> and the To tag in the response to the original request SHOULD be the
> same. The response to CANCEL is 1503
> passed to the server transaction for transmission. 1504
> 
> -Jonathan R.
> 
> --
> Jonathan D. Rosenberg, Ph.D.            72 Eagle Rock Avenue
> Chief Scientist                         First Floor
> dynamicsoft                             East Hanover, NJ 07936
> [email-masked]                 FAX: (973) 952-5050
> http://www.jdrosen.net <http://www.jdrosen.net>                   PH:
> (973) 952-5000
> http://www.dynamicsoft.com <http://www.dynamicsoft.com>

-- 
Jonathan D. Rosenberg, Ph.D.            72 Eagle Rock Avenue
Chief Scientist                         First Floor
dynamicsoft                             East Hanover, NJ 07936
[email-masked]                 FAX: (973) 952-5050
http://www.jdrosen.net                  PH:  (973) 952-5000
http://www.dynamicsoft.com

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