Outbound and mid-dialog requests with GRUU

Here's a question:

A UA has registered two flows to one instance. It has one gruu. The UA  
uses the gruu as the contact in a dialog-forming request.

An in-dialog request (for example, BYE) is sent back  to the UA. On  
which flow does it get routed?

I believe: It gets routed on the flow that formed the dialog, as long  
as that flow exists. The proxy has stored dialog state and knows which  
flow the dialog-forming request used.

The GRUU spec assumes one contact per gruu. Outbound transforms this  
to multiple contacts and multiple flows per gruu. I think this  
requires further specification as to flow selection, possibly for out- 
of-dialog messages and almost definitely for in-dialog messages.  
Perhaps this is documented somewhere and I've just missed it.

Any clues?

--
Dean
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