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bind/doc/design/ncache

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Update the copyright information in all files in the repository This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
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<!--
add
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Copyright (C) Internet Systems Consortium, Inc. ("ISC")
4401. [misc] Change LICENSE to MPL 2.0.
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add
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SPDX-License-Identifier: MPL-2.0
Update the copyright information in all files in the repository This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
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new URL for the copyright notice
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This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, you can obtain one at https://mozilla.org/MPL/2.0/.
Update the copyright information in all files in the repository This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
2021-06-03 08:37:05 +02:00
new URL for the copyright notice
2000-08-09 04:37:43 +00:00
See the COPYRIGHT file distributed with this work for additional
information regarding copyright ownership.
Update the copyright information in all files in the repository This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
2021-06-03 08:37:05 +02:00
-->
Update license headers to not include years in copyright in all applicable files
2018-02-23 09:53:12 +01:00
add
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Negative Caching
The non-DNSSEC case is pretty easy.
foundname = soa name
rdataset = soa
node = NULL
DNSSEC complicates things a lot, because we have to return one or more NXT
records (if we have them) as proof. Another tricky bit here is that we may
have an NXT record so we know the answer is NODATA, but we don't have the SOA
so we can't make a NODATA response that a non-DNSSEC-aware server could
cache. Life would sure be easier if we knew if the client understood DNSSEC.
Not sure what to do in this case. Probably return delegation to force client
to ask authority.
Perhaps we should just create some kind of meta-rdata, the "negative cache
rdata type"?
Or maybe something like:
dns_rdataset_ncachefirst()
dns_rdataset_ncachenext()
dns_rdataset_ncachecurrent()
dns_db_ncachenew(db, type) /* type can be any */
dns_db_ncachesoa(name, rdataset)
dns_db_ncachenxt(name, rdataset)
dns_db_ncacheadd(db, name, version)
Ick. I favor the former.
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