1 Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
2 Copyright (C) 1999-2001 Internet Software Consortium.
3 See COPYRIGHT in the source root or http://isc.org/copyright.html for terms.
5 $Id: ncache,v 1.7 2004/03/05 05:04:46 marka Exp $
9 The non-DNSSEC case is pretty easy.
15 DNSSEC complicates things a lot, because we have to return one or more NXT
16 records (if we have them) as proof. Another tricky bit here is that we may
17 have an NXT record so we know the answer is NODATA, but we don't have the SOA
18 so we can't make a NODATA response that a non-DNSSEC-aware server could
19 cache. Life would sure be easier if we knew if the client understood DNSSEC.
20 Not sure what to do in this case. Probably return delegation to force client
24 Perhaps we should just create some kind of meta-rdata, the "negative cache
27 Or maybe something like:
29 dns_rdataset_ncachefirst()
30 dns_rdataset_ncachenext()
31 dns_rdataset_ncachecurrent()
33 dns_db_ncachenew(db, type) /* type can be any */
34 dns_db_ncachesoa(name, rdataset)
35 dns_db_ncachenxt(name, rdataset)
36 dns_db_ncacheadd(db, name, version)
38 Ick. I favor the former.