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STOP! RE: [Sip] B2BUA & Max-Forwards



Title: Message
Pardon me while I assert.
 
This thread is non-productive and downloading it is taking forever. I think we have enough input to make any clarifications on B2BUA in bis that I think we're going to be able to make.
 
The IESG has decreed that our specs WILL have provisions for security functions, etc. and that anything that isn't compliant with these provisions is NOT COMPLIANT with the specification. Enough said. If you don't like it, talk to the non-com about changing the IESG or take it up with the iESG.
 
Your can build ANY NON-COMPLIANT SYSTEM YOU WANT TO BUILD. Many such systems will be USEFUL and WIDELY DEPLOYED. But it would be an error to say that any such system is "compliant  o RFC ABCD" when that system does not implement something that RFC ABCD lists as MUST IMPLEMENT.
 
So if you have a thing you call a SIP proxy that does not implement MUST IMPLEMENT functions of a SIP proxy as specified in RFC 3261, then it IS NOT, by definition, a fully compliant SIP proxy. Odds are, it's some kind of B2BUA that acts mostly but not quite like a proxy, and that's OK. But DO be advised that anything that is "not a compliant proxy" is likely to have limitations with some kind of service, extension or usage of SIP, and that we're NOT going to worry about that a whole lot in the protocol design.  So be prepared to update the widget occasionally if it needs it to continue being useful.
 
Thanks.
 
--
Dean Willis
Annoyed Co-Chair, SIP Working Group.