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.

        Paul

Andreas Byström wrote:
> What should a UA do in case it receives an request with an malformed sipuri
> in the request line? For example if there is an incoming INVITE
> [EMAIL PROTECTED] sip/2.0 (ie the sender has not escaped the #
> character).
> 
>  
> 
> I guess there would be good to respond with maybe 400 Bad Request or some
> other 4XX response, but I cant find something that supports this in the
> RFCs. Does anyone know if there is some specifications that defines what to
> do in a case with malformed uri in the requestline or is it up do the
> developer of the UAS to decide? If no answer at all the UAC will probably
> retransmit…
> 
>  
> 
> Regards,
> 
> // Andreas
> 
>  
> 
>  
> 
> _______________________________
> 
>  
> 
> Andreas Byström
> 
> Software Engineer
> 
>  
> 
> Teligent AB
> 
> Konsul Jonssons väg 17
> 
> P.O. Box 213
> 
> SE 14923 Nynäshamn
> 
>  
> 
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> 
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> 
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> 
> mobile: +46 (0)733 1172 21
> 
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