1034 Resolver Algo Question

[Barry Margolin]

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?

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 ***