Subject: Re: [SIP] Re: SIP digest, Vol 1 #639 - 10 msgs

From: [email-masked]
Date: Wed, 27 Dec 2000 09:19:52 +0530

My question today is, when a proxy forwards a 200
response and never receives a bye, nor a cancel after
he supposes that communication is already established,
how do you handle such a case?

Arjun> If its a stateless proxy, its no bother, since it does
Arjun> not keep transaction state.
Arjun> In the case of stateful, typically proxies
Arjun> insert a record route to make sure he sees future
Arjun> requests. If you are talking about a case where
Arjun> due to some error, the termination message never
Arjun> reaches the proxy,even though it really terminated,
Arjun> I guess the proxy could have
Arjun> some local configuration which would purge unfreed
Arjun> call records after a defined time interval. That would
Arjun> be implementation dependant.

It is said in the drafts that every SIP server must
support unknown messages, but in this case, I think we
can't rely on those messages in our implementation.
I have though that It could be possible for proxies
also to contact any UAS, as they do with UAC's
registered on their directory, do you think that issue
possible?(It could solve many message digest
problems).

Arjun> You lost me here.

Regds
Arjun

--
Arjun Roychowdhury @ Hughes Software Systems

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