Questions about "incomplete" additional data

[Mark.Andrews at nominum.com]

> 
> > Named will look up missing records whenever it has attempted
> > to find them and failed except when sysquery calls sysquery
> > and the later sysquery needs a sysquery.  
> > 
> > So the answer to this particular question is "when it tries
> > to add the additional record to the response".
> 
> Actually, Matt asked what a BIND name server does when it
> *receives* a referral that's missing one or more A RRs in
> its additional data.
> 
> It looks to me from a cursory reading of ns_resp() in ns_resp.c
> that this gets done as soon as you try to use the NS RRset.  You
> call nslookup(), which finds those A RRs we have cached via
> nlookup() and gets the rest using sysquery().  Is that close?

	Yes.
	In answer to Matt's bias question.  Yes there is a slight bias.
> 
> cricket
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com