On Thu, 2006-06-08 at 23:37 -0400, Paul Kyzivat wrote: > > In my case, I need to send INFO request before 18X response itself. Consider > > this situation where the proxy sends INFO request to the originating UA > > after it has forwarded the initial INVITE to the terminating UA but before > > it has received any 18X/final response from terminating UA. > > Is this possible? > > That is a pretty clearly invalid. The *proxy* is not allowed to be > *originating* any messages in the dialog.
Well, the proxy could pretend to fork the request to a UA that is inside the same process. *That* UA can respond with 180, followed by an INFO in the dialog created by that 180. Then it has to do some sort of failure response to terminate that early dialog. (Actually, it can omit generating the 180, and pretend the network lost the 180, but that the INFO got through...) Not pretty. But that's probably not what you want, as the INFO would be in a *different* early dialog than the 180 that the real UAS will provide. Indeed, you can't fake a request that's in the early dialog that the real UAS is creating, as you can't predict the to-tag and CSeq that it will use. What exactly are you trying to do? Dale --- interop.pingtel.com -- the public SIP phone interoperability test server _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
