2 Mar
2005
2 Mar
'05
7:15 a.m.
On 01-03 21:19, Juha Heinanen wrote:
Jan Janak writes:
I am sorry, I was wrong (I confused CANCELs with ACKs).
Jan.
Actually I think that you should apply exactly
the same logic as when
processing the INVITE. CANCEL can be also sent end-to-end and in this
case the user location lookup would be necessary to route it to the
callee.
jan,
under what circumstances cancel is sent end-to-end? my understanding
from rfc3261 is that if a proxy has STATEFULLY forwarded an invite, the
corresponding cancel is always a hop-by-hop request. if invite was
forwarded statelessly, then also cancel must be forwarded statelessly in
the same way as invite, because there is no response context for it.