[Serusers] Race condition with CANCEL?

[Bogdan-Andrei Iancu]

this may happen only of you do stateless processing. If you use TM 
(t_relay) CANCEL will send automatically to same destination as INVITE.
So when INVITE comes, even if user B is register, t_relay will force the 
CANCEL to take same path as INVITE, which means to VM.

bogdan

Ingo Wolfsberger wrote:

>Hello,
>
>Following situation:
>t+0:
>User A is registerd
>User B is not registered
>
>t+1:
>User A calls user B
>Call is transfered to the vm box.
>vm does not go off-hook.
>
>t+2:
>User B registers
>
>t+3:
>User A hooks on, a CANCEL is send.
>
>Currently I handle a CANCEL like an INVITE, which means the CANCEL is sent
>to user B and not to the vm.
>
>How to handle this case?
>
>bye,
>    Ingo
>
>  
>