16 Oct
2007
16 Oct
'07
3:51 p.m.
El Tuesday 16 October 2007 17:29:06 Antonio Reale escribió:
Ok, thanks.
Note that in a DNS SRV query the client gets all the entries (as in any other
DNS query) so it his responsability to query the second alternative
(priority&weight) if the first doesn't response.
But there is ystem DNS cache and so...
So what happen if a call starts on the first proxy,
OpenSER on the first
proxy goes down and one of the clients close the call?
If the client sends the BYE on the second OpenSER, the proxy is able to
associate it with the correct call (for example for accounting purpose)?
Remember: OpenSer is not dialog aware (except using "dialog" module, but
it's
not the purpose).
OpenSer is just transactions aware. In a simple dialog there are at least
those transactions:
- INVITE (from caller to called) and responses 100, 180, 200.
- ACK (from caller to called)
- BYT (from caller to called) and response 200.
All these 3 transactions becomes a dialog JUST in the endpoints (phones), but
for OpenSer they are completely INDEPENDENT transactions.
I recomend you study it a lot since it's vital:
http://www.switzernet.com/people/emin-gabrielyan/070410-SIP-transactions/
http://4z.com/people/emin-gabrielyan/public/070412-SIP-record-route/
--
Iñaki Baz Castillo
ibc(a)in.ilimit.es