Bi Ran schrieb: > See following sentences from 3261. > > Note that both the transaction corresponding to the original request > and the CANCEL transaction will complete independently. However, a > UAC canceling a request cannot rely on receiving a 487 (Request > Terminated) response for the original request, as an RFC 2543- > compliant UAS will not generate such a response. If there is no > final response for the original request in 64*T1 seconds (T1 is > defined in Section 17.1.1.1), the client SHOULD then consider the > original transaction cancelled and SHOULD destroy the client > transaction handling the original request.
Ok. But that does not answer my question (as far as I can see). Should the proxy stop retransmissions or not? regards klaus > > > -------------------------------------------------- > From: "Klaus Darilion" <[EMAIL PROTECTED]> > Sent: Friday, March 07, 2008 5:10 PM > To: <[email protected]> > Subject: [Sip-implementors] CANCEL retransmisson question of no > provisionalresponse! > >> Hi! >> >> Could someone help me please with this question. >> >> Scenario: A transaction-stateful proxy forwards the INVITE request. The >> proxy does not receive a provisional response, thus starts >> retransmissions. Now, the caller CANCELs the call. How is the proxy >> supposed to handle this? Does the proxy still have to retransmit the >> INVITE or can it stop retransmitting the INVITE? >> >> From logical point of view I would think that the proxy should stop the >> retransmissions, but from Figure 5 in RFC 3261 it looks like the only >> way to come from "Calling" state to "Terminated" state is waiting for >> Timer B fires (as there is no provisional response yet). >> >> thanks >> klaus >> _______________________________________________ >> Sip-implementors mailing list >> [email protected] >> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors >> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
