From: Paul Kyzivat <[EMAIL PROTECTED]> The UA receiving this must (by definition) be the UAS. It *ought* to be the intended recipient of the request (leaving aside some B2BUAs which have different issues). As the intended recipient, the URI ought to be one it knows about. Since this one is malformed (and the UA probably wouldn't *intend* to support malformed ones) this URI must be something unknown to the UAS. In that case a good response is 404 Not Found.
I would say that 400 is acceptable also, because the UA may not be even able to parse the incoming message enough to decide what precisely it didn't like about. If the UA is one that never forwards messages, it seems plausible that it might take a liberal interpretation of an un-escaped character that should be escaped but otherwise has no interpretation. If the UA is considering sending the message on, I would argue strongly that it should reject the message, because it can't forward the message in a strictly compliant way without making guesses as to what the sender meant, and it does not have the implicit information "if I received it, it must have been intended for me". Dale _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
