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List:       namedroppers
Subject:    Re: NO RR draft announcement
From:       Brian Wellington <Brian.Wellington () nominum ! com>
Date:       2000-07-28 0:11:50
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On 27 Jul 2000, Simon Josefsson wrote:

> Brian Wellington <Brian.Wellington@nominum.com> writes:
> 
> > > It has also been suggested that a new EDNS label could be used, for
> > > storing hashed domain names.
> > 
> > When first reading the draft, I thought that using a binary label
> > (bitstring) would be a good choice, since it isn't subject to case
> > folding.  The problem is that it's a label type that isn't understood by
> > most resolvers.  It's fairly easy for a resolver to skip NXT records,
> > since it's just an unknown type, but I wouldn't be surprised if there were
> > resolvers that did very bad things when seeing an unknown label type.
> 
> Would these bad things be any more harmful than not being able to
> authenticate denial for records?  If so, I don't think it's worth
> persuing the idea, since a alternative that is backwards compatible
> can work equally well.

Got me.  That's the point - I don't know if all resolvers properly handle
unknown label types.  New record types are added fairly often, but until
binary labels, no new label types had been introduced for a long time.  I
don't think it's possible to fully parse a message containing an unknown
label type.

Brian



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