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

[Jonathan Rosenberg <jdrosen@dynamicsoft.com>]

"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
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