1034 Resolver Algo Question

[Mark Andrews]

> In article <cg2prb$2nf2$1 at sf1.isc.org>,
>  "William Stacey" <staceyw at mvps.org> wrote:
> 
> > I also have questions on 4c of 5.3.3
> >          "c. if the response shows a CNAME and that is not the
> >             answer itself, cache the CNAME, change the SNAME to the
> >             canonical name in the CNAME RR and go to step 1."
> > 
> > 1) Why does it say "and that is not the answer itself"?  If it was the
> > answer, 4a would have returned it already - no?
> 
> True, this is redundant.
> 
> > 2) It does not say anything about saving the CNAME rr anywhere.  You change
> > the Sname to the canonical name in the RR and start at step 1 again.  What
> > happens to the CNAME we just processed?  Lost?  Or do you keep building an
> > answer section in a tmp reply structure until done or error?

	The answer was in the section you quoted.

		  "cache the CNAME"

> What do you mean by "answer section"?  This is the algorithm for a 
> client-side resolver.  Answer sections appear in the packets sent by 
> servers; that algorithm is described in section 4.3.2.
> 
> -- 
> Barry Margolin, barmar at alum.mit.edu
> Arlington, MA
> *** PLEASE post questions in newsgroups, not directly to me ***
> 
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org