Re: Review of draft-kuthan-sip-derive-00
Adam Roach <[email protected]>
| Newsgroups | gmane.ietf.sip |
|---|---|
| Message-ID | <[email protected]> |
I'll repeat the most important argument from my previous email, which you elided in your response: You're smart. If someone offers you enough money to make this work in your product, you'll figure it out. /a On 11/20/08 3:58 PM, Hadriel Kaplan wrote: >> -----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 > _______________________________________________ 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