RE: [Sip] NOTIFY establishes a dialog

[Juha Heinanen <jh@lohi.eng.song.fi>]

Robert Sparks writes:

 > Now, subsequent conversations indicate that we probably want to
 > discourage this rewriting in favor of the double-record-route
 > solution so that the RR header field in a response can be signed
 > by the responding endpoint. The quoted text below would become
 > irrelevant if we made it illegal for proxies to rewrite RR header
 > field values.

at least proxys should be allowed to add parameters to record
route/route headers.

by the way, i think it is a big mistake that the current sip rfc doesn't
allow a re-invite to include a new record route.  consider the case
where a call originates in a mobile network and then roams to wlan, for
example.  it would be really stupid if the subsequent messages of the
dialog would need to go via the proxies of the mobile network.

-- juha

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