On Fri, 2010-03-05 at 13:52 -0500, Dale Worley wrote:
> 
> I think we need to frame what the actual requirements are.  One open
> question is whether it is needed at all; do people create
> looping-request situations any more?

It's still possible, but it's a lot harder than it used to be.

We still can't prevent the loops that are created when the proxy
configuration does not match the DNS routing rules (send a request to
sip:u...@fqdn when fqdn is not the sip domain and not configured as an
alias); those go until they run out of hops (max 20).

In theory, an external b2bua can also cause loops by not passing vias
(which contain some of our loop-detection data) or by changing request
uris in a non-repeating way that still goes to the same proxy.


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