[OpenSER-Devel] question on t_relay on CANCEL

[Iñaki Baz Castillo]

On Friday 08 February 2008 11:36:18 Dan Pascu wrote:
> I've even seen devices
> that send a CANCEL after a 200 OK, but before the ACK, as they consider
> that the dialog is not established until confirmed by the ACK. Which
> makes sense because is cleaner to cancel a call setup with a CANCEL
> before it is confirmed, than to send an ACK and then a BYE (for example
> if I do not want to accept the session because the 200 OK contains
> something I do not agree on or is badly formatted, then I don't want to
> confirm the session with an ACK and then close it with a BYE).

But AFAIK sending a BYE after an ACK is the way specified in RFC 3261. Is it 
RFC compliant to send a CANCEL after a 200 OK is received? will most of UAS 
accept it and terminate the dialog?

-- 
Iñaki Baz Castillo
ibc at in.ilimit.es