Klaus Darilion wrote: > From the "sip-implementors" list - looks like Maxim is right.
Thanks, Klaus! Should this behavior be the default one then? > regards > klaus > > > Robert Sparks schrieb: >> Part of why it does this is to deal with the case that the first >> INVITE the proxy sent actually got somewhere, but its response was >> lost. The retransmission will stimulate a retransmission of the >> response, letting you move forward to sending the CANCEL from the >> proxy. >> >> RjS >> >> On Mar 7, 2008, at 7:06 AM, Bob Penfield wrote: >> >>> >>> The INVITE transaction must still complete independent of the >>> CANCEL. So the proxy would continue to re-transmit the INVITE. If >>> the proxy does receive a provisional response, it would then stop >>> retransmissions and send the CANCEL down stream. If timer B fired, >>> it would send a 408 response to the INVITE. >>> >>> Note that the proxy should respond to the CANCEL with 200 OK when >>> it receives it since the INVITE transaction is in progress. >>> >>> cheers, (-:bob >>> >>> -----Original Message----- From: >>> [EMAIL PROTECTED] >>> [mailto:[EMAIL PROTECTED] On Behalf >>> Of Klaus Darilion Sent: Friday, March 07, 2008 4:11 AM To: >>> [EMAIL PROTECTED] Subject: [Sip-implementors] >>> CANCEL retransmisson question of no provisional response! >>> >>> 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 Regards, -- Maksym Sobolyev Sippy Software, Inc. Internet Telephony (VoIP) Experts T/F: +1-646-651-1110 Web: http://www.sippysoft.com _______________________________________________ Devel mailing list Devel@lists.openser.org http://lists.openser.org/cgi-bin/mailman/listinfo/devel