vijay,
if Registrar has issued an (200 OK, REGISTER) before
getting the CANCEL is fine, but the registrar going
ahead and sending a (200 OK, CANCEL) to respond to the
CANCEL transaction does'nt fit here as .....
(2xx reponses are usually used to indicate that the
action was succesfully received, understood and
accepted .... (pg 39 bis-02)
here even though the CANCEL is received and
understood, but it is still not accepted (but ignored)
and i dont see any (XXX) response (1-6) which would
match the scenario.. so may be a 7xx which would say
that even
though the action was received and understood, but
still ignored (a variation from 2XX).
Rama
--- Vijay Gurbani <[EMAIL PROTECTED]> wrote:
> Neumaerker Elke wrote:
> >
> > Hello,
> >
> > In the SIP specification is written :
> >
> > "While CANCEL can terminate any pending request
> other than ACK or CANCEL,
> > it is typically useful only for INVITE".
> >
> > How has a Registrar to react on receiving a CANCEL
> for REGISTER, if the
> > registration is still in progress?
>
> Presumably, it will send a "200 OK (CANCEL)" to
> respond to the CANCEL req-
> uest and a "487 Request Terminated" to respond to
> the REGISTER request.
>
> Note that if the Registrar has already issued a "200
> OK (REGISTER)" to the
> REGISTER request before it got the CANCEL, the
> CANCEL has no impact on
> further processing. The Registrar will still issue
> a "200 OK (CANCEL)" to
> respond to the CANCEL transaction.
>
> Regards,
>
> - vijay
> --
> Vijay K. Gurbani
> vkg@{lucent.com,research.bell-labs.com,acm.org}
> Internet Software and eServices Group
> Lucent Technologies/Bell Labs Innovations 263 Shuman
> Blvd., Rm 1A-413
> Naperville, Illinois 60566 Voice: +1 630 224
> 0216 Fax: +1 630 713 0184
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