Re: [Sip] draft-lee-sip-dns-sd-uri-00 - SIP URI Service Discovery using DNS-SD

   From: Jae Woo Lee <jae@cs.columbia.edu>

   > 5.2.  Request Destination
   >
   > It seems to me that this could be both simplified and corrected by
   > just saying that if a "contact" attribute is available, it should be
   > used as the request-URI of any out-of-dialog SIP request.  Since this
   > definition automatically refers to RFC 3263, it allows a lot of
   > generality while behaving correctly in various special cases.
   >

   We specify in Section 5.1 that the Request-URI must be set from the  
   SIP URI from the service instance name (which SHOULD be AOR.)  We  
   look at the contact attribute to determine where to send the  
   request.  We felt that this is natural since the Request-URI then  
   reflects the logical recipient who advertised the service.

I'd suggest that you change this so that the SIP URI from the service
instance name is the To value, and the URI part of the contact becomes
the request-URI.  This gives DNS SD the same redirection power as a
proxy/registrar.  It also allows you to not have to specify how the
contact value is to be interpreted, because you inherit all the rules
of RFC 3263 automatically.

Dale

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