[Kamailio-Devel] How does Kamailio match an ACK for a stateless XX replied by Kamailio itself?
abalashov at evaristesys.com
Mon Dec 15 12:31:34 CET 2008
Iñaki Baz Castillo wrote:
> 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
>> 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
> 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.
Oh, I see. You were asking about only ACKs Kamailio *originates* as
such, rather than ones it *regenerates*. Got it.
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