[Kamailio-Devel] How does Kamailio match an ACK for a stateless [3456]XX replied by Kamailio itself?

[Iñaki Baz Castillo]

El Lunes, 15 de Diciembre de 2008, Alex Balashov escribió:
> > I just would like to know how Kamailio handles it, just curiosity. Of
> > course, the current behaviour seems efficient (Kamailio doesn't need to
> > generate a server transaction but at the same time it can absorb the
> > ACK).
>
> I could be wrong, but I would have thought that if a reply is being
> generated by Kamailio itself, statelessly or otherwise, then the ACK
> would be sent by far the end to the Kamailio host's address in the RURI.
>    Whereas an end-to-end ACK is addressed and routed to the other
> endpoint as a sequential request.

Well, not exactly, ent-to-end ACK only occurs when there is 200 OK for an 
INVITE.
If an INVITE receives a negative reply from the callee, the the *proxy* 
generates the ACK and sends it to the callee. After it, the proxy sends the 
best response (negative in this case) to the caller, and the caller sends ACK 
for the proxy (it's not an end-to-end ACK).

Bue anyway, I'm not speaking about it, I'm speaking about the case in which 
Kamailio replies *stateless* by itself a negative reply.

-- 
Iñaki Baz Castillo