> -----Original Message----- > From: Adam Roach [mailto:[EMAIL PROTECTED] > Sent: Thursday, November 20, 2008 3:47 PM > > But those B2BUAs are all in the same administrative domain.
Unfortunately they're not. Alice calls Benny; Alice is in foo.com, Benny is in bar.com; foo.com b2bua sends it to pwned.com, which sends it to bar.com. Benny then sends an out-of-dialog Subscribe to [EMAIL PROTECTED] There's no guarantee it will go through pwned.com on its way back there. But anyway even just hitting a different b2bua at pwned.com will make it unlikely to work. :( > Given that > fact, there are solutions to the problem, such as synchronized minimal > state Oh yeah that's fun. We're nuts, not crazy. :) > -- or, preferably, stateless reversible dialog identifier > transformations. We tried that - gets too big. (did I mention many devices appear to have finite header string length limits?) Since this problem at some level is that the From-URI is being used instead of contact-uri, if you'd prefer we can also just munge the From-URI to identify the specific b2bua. Yuck. And it won't work if there are 2 pwned.com transit domains. And down the rabbit-hole we go... Or we can go do this little thing like Session-ID. :) -hadriel _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
