2020-07-28 07:51:19 +00:00
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From 521fc8dcc0ac064ae8bc521418f5b03f0ceec657 Mon Sep 17 00:00:00 2001
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2020-01-21 22:30:08 +00:00
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From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
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Date: Thu, 7 Nov 2019 14:31:03 +0100
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Subject: [PATCH] Implement serve-stale in 9.11
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Squashed commit of the following:
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commit 32f47f36e545223b2a4757588d7bd4af8c5f5760
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Author: Petr Menšík <pemensik@redhat.com>
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Date: Tue Sep 3 18:45:54 2019 +0200
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convert serve_stale to db_test
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Manual checkout from commit e8f61dd315c5d1c88915bb79361182241e42e47a.
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Use test modified for cmocka, including serve-stale tests.
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commit 071eb1fb0786f6d614955813d99c3caabff33383
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Author: Michał Kępień <michal@isc.org>
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Date: Fri Apr 27 09:13:26 2018 +0200
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Detect recursion loops during query processing
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Interrupt query processing when query_recurse() attempts to ask the same
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name servers for the same QNAME/QTYPE tuple for two times in a row as
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this indicates that query processing may be stuck for an indeterminate
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period of time, e.g. due to interactions between features able to
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restart query_lookup().
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(cherry picked from commit 46bb4dd124ed031d4c219d1e37a3c6322092e30c)
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commit c12090bc361c7fa4522ace73899e778e44e9b295
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Author: Petr Menšík <pemensik@redhat.com>
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Date: Mon Sep 2 11:12:32 2019 +0200
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Fix test name used in whole test-suite
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Correct name is serve-stale
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commit ff4d826f295d268a248ca06941d65c903e1b405c
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Author: Petr Menšík <pemensik@redhat.com>
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Date: Fri Aug 30 17:43:28 2019 +0200
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Clean files in more generic rules
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commit 8d81ed15eda9a2a11e1433d1fdddacfc772708b6
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Author: Petr Menšík <pemensik@redhat.com>
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Date: Thu Aug 29 21:27:57 2019 +0200
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[rt46602] Pass port numbers to tests via environment variables
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Manually applied commit f5d8f079008b648d2e343543e66dd728054c6101
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commit 94fafa477891576286def8c4041ad127734af2d1
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Author: Tony Finch <dot@dotat.at>
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Date: Tue Apr 10 16:17:57 2018 +0100
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Move serve-stale logging to its own category, so that its verbosity can be curtailed.
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(cherry picked from commit 4b442c309dfb2c8880b19af4133047655bb734df)
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commit e0c884bee98c3d2533dfaa667f58c6a80d8a3a00
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Author: Michał Kępień <michal@isc.org>
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Date: Fri Apr 27 09:13:26 2018 +0200
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Prevent check_stale_header() from leaking rdataset headers
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check_stale_header() fails to update the pointer to the previous header
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while processing rdataset headers eligible for serve-stale, thus
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enabling rdataset headers to be leaked (i.e. disassociated from a node
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and left on the relevant TTL heap) while iterating through a node. This
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can lead to several different assertion failures. Add the missing
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pointer update.
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(cherry picked from commit 391fac1fc8d2e470287b5cc4344b3adb90c6f54a)
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commit d724cc1d80ee8d46113eaf82549d49636739b67c
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Author: Matthijs Mekking <matthijs@isc.org>
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Date: Thu Jan 24 10:24:44 2019 +0100
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Print in dump-file stale ttl
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This change makes rndc dumpdb correctly print the "; stale" line.
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It also provides extra information on how long this data may still
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be served to clients (in other words how long the stale RRset may
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still be used).
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(cherry picked from commit 924ebc605db798e2a383ee5eaaebad739e7c789c)
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commit 625da4bd4590ac6108bb30eddd23ceffb245ae49
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Author: Michał Kępień <michal@isc.org>
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Date: Mon Oct 22 15:26:45 2018 +0200
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Check serve-stale behavior with a cold cache
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Ensure that serve-stale works as expected when returning stale answers
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is enabled, the authoritative server does not respond, and there is no
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cached answer available.
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(cherry picked from commit 27cfe83a388147edfa0451b28c06c746912ea684)
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commit d67ae10461c409fdafdbbe64f857db2552b71059
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Author: Michał Kępień <michal@isc.org>
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Date: Mon Oct 22 15:26:45 2018 +0200
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Check TTL of stale answers
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Make sure that stale answers returned when the serve-stale feature is
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enabled have a TTL matching the value of the stale-answer-ttl setting.
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(cherry picked from commit 893ab37ce78c658215bd3a019f25afe795b37d5a)
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commit 50459107805e68e4a63a8e497bf58ef3ce013ddb
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Author: Michał Kępień <michal@isc.org>
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Date: Mon Jul 9 14:35:12 2018 +0200
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Do not use Net::DNS::Nameserver in the "serve-stale" system test
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Net::DNS versions older than 0.67 respond to queries sent to a
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Net::DNS::Nameserver even if its ReplyHandler returns undef. This makes
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the "serve-stale" system test fail as it takes advantage of the newer
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behavior. Since the latest Net::DNS version available with stock
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RHEL/CentOS 6 packages is 0.65 and we officially support that operating
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system, bin/tests/system/serve-stale/ans2/ans.pl should behave
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consistently for various Net::DNS versions. Ensure that by reworking it
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so that it does not use Net::DNS::Nameserver.
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(cherry picked from commit c4209418a50c09142375f7edadca731c526f3d3a)
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commit 4b5befc714bb386bd245b1c14ce3bce5ae6fb5fa
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Author: Petr Menšík <pemensik@redhat.com>
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Date: Tue Jun 5 21:38:29 2018 +0200
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Fix server-stale requirement, skip without Time::HiRes
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(cherry picked from commit 7a0c7bf9c8e6a724e52635eed213ad25b9504e66)
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commit 5ce51a3a7e5ef3087c4d022e3fca42fb2fd0c996
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Author: Ondřej Surý <ondrej@sury.org>
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Date: Wed Oct 18 13:01:14 2017 +0200
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[rt46602] Update server-stale test to run on port passed from run.sh script
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(cherry picked from commit f83ebd34b9555a5a834c58146035173bcbd01dda)
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commit 3954a9bf3437f6fab050294a7f2f954a23d161ec
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Author: Ondřej Surý <ondrej@sury.org>
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Date: Wed Oct 18 14:18:59 2017 +0200
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[rt46602] Add serve-stale working files to .gitignore
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(cherry picked from commit cba162e70e7fac43435a606106841a69ce468526)
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commit 112aa21f5fa875494820e4d1eb70e41e10e1aae7
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Author: Mark Andrews <marka@isc.org>
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Date: Thu Oct 12 15:33:47 2017 +1100
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test for Net::DNS::Nameserver
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(cherry picked from commit 5b60d0608ac2852753180b762d1917163f9dc315)
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commit 9d610e46af8a636f44914cee4cf8b2016054db1e
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Author: Mark Andrews <marka@isc.org>
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Date: Thu Oct 12 15:19:45 2017 +1100
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add Net::DNS prerequiste test
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(cherry picked from commit fa644181f51559da3e3913acd72dbc3f6d916e71)
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commit e4ea7ba88d9a9a0c79579400c68a5dabe03e8572
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Author: Mark Andrews <marka@isc.org>
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Date: Wed Sep 6 19:26:10 2017 +1000
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add quotes arount $send_response
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(cherry picked from commit 023ab19634b287543169e9b7b5259f3126cd60ff)
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commit 0af0c5d33c2de34da164571288b650282c6be10a
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Author: Mark Andrews <marka@isc.org>
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Date: Thu Nov 23 16:11:49 2017 +1100
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initalise serve_stale_ttl
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(cherry picked from commit 2f4e0e5a81278f59037bf06ae99ff52245cd57e9)
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commit fbadd90ee81863d617c4c319d5f0079b877fe102
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Author: Evan Hunt <each@isc.org>
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Date: Thu Sep 14 11:48:21 2017 -0700
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[master] add thanks to APNIC and add missing note for serve-stale
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commit deb8adaa59955970b9d2f2fe58060a3cbf08312b
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Author: Mark Andrews <marka@isc.org>
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Date: Wed Sep 6 12:16:10 2017 +1000
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silence 'staleanswersok' may be used uninitialized in this function warning. [RT #14147
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commit 0e2d03823768dc545015e6ce309777210f4a9f85
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Author: Petr Menšík <pemensik@redhat.com>
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Date: Thu Aug 29 19:57:58 2019 +0200
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More fixes to merge
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commit 360e25ffe7623ea0a2eec49395001f4940967776
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Author: Mark Andrews <marka@isc.org>
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Date: Wed Sep 6 09:58:29 2017 +1000
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4700. [func] Serving of stale answers is now supported. This
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allows named to provide stale cached answers when
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the authoritative server is under attack.
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See max-stale-ttl, stale-answer-enable,
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stale-answer-ttl. [RT #44790]
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Signed-off-by: Petr Menšík <pemensik@redhat.com>
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---
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bin/named/config.c | 9 +-
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bin/named/control.c | 2 +
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bin/named/include/named/control.h | 1 +
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bin/named/include/named/log.h | 1 +
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bin/named/include/named/query.h | 15 +
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bin/named/include/named/server.h | 13 +-
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bin/named/log.c | 1 +
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bin/named/query.c | 164 +++++-
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bin/named/server.c | 177 +++++-
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bin/named/statschannel.c | 6 +
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bin/rndc/rndc.c | 2 +
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bin/rndc/rndc.docbook | 19 +
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bin/tests/system/chain/prereq.sh | 7 +
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bin/tests/system/conf.sh.in | 2 +-
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bin/tests/system/dyndb/driver/db.c | 2 +
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bin/tests/system/serve-stale/.gitignore | 11 +
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bin/tests/system/serve-stale/ans2/ans.pl.in | 178 ++++++
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bin/tests/system/serve-stale/clean.sh | 15 +
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.../system/serve-stale/ns1/named1.conf.in | 35 ++
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.../system/serve-stale/ns1/named2.conf.in | 35 ++
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bin/tests/system/serve-stale/ns1/root.db | 5 +
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.../system/serve-stale/ns3/named.conf.in | 35 ++
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bin/tests/system/serve-stale/prereq.sh | 38 ++
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bin/tests/system/serve-stale/setup.sh | 13 +
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bin/tests/system/serve-stale/tests.sh | 536 ++++++++++++++++++
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doc/arm/Bv9ARM-book.xml | 69 ++-
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doc/arm/logging-categories.xml | 11 +
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doc/arm/notes-rh-changes.xml | 14 +-
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doc/misc/options | 10 +
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lib/bind9/check.c | 78 ++-
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lib/dns/cache.c | 38 +-
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lib/dns/db.c | 22 +
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lib/dns/ecdb.c | 4 +-
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lib/dns/include/dns/cache.h | 21 +
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lib/dns/include/dns/db.h | 35 ++
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lib/dns/include/dns/rdataset.h | 11 +
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lib/dns/include/dns/resolver.h | 43 +-
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lib/dns/include/dns/types.h | 6 +
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lib/dns/include/dns/view.h | 3 +
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lib/dns/master.c | 14 +-
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lib/dns/masterdump.c | 23 +
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lib/dns/rbtdb.c | 207 ++++++-
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2020-07-28 07:51:19 +00:00
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lib/dns/resolver.c | 79 ++-
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2020-01-21 22:30:08 +00:00
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lib/dns/sdb.c | 4 +-
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lib/dns/sdlz.c | 4 +-
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lib/dns/tests/db_test.c | 198 ++++++-
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lib/dns/view.c | 3 +
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lib/isccfg/namedconf.c | 5 +
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2020-07-28 07:51:19 +00:00
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48 files changed, 2122 insertions(+), 102 deletions(-)
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2020-01-21 22:30:08 +00:00
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create mode 100644 bin/tests/system/serve-stale/.gitignore
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create mode 100644 bin/tests/system/serve-stale/ans2/ans.pl.in
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create mode 100644 bin/tests/system/serve-stale/clean.sh
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create mode 100644 bin/tests/system/serve-stale/ns1/named1.conf.in
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create mode 100644 bin/tests/system/serve-stale/ns1/named2.conf.in
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create mode 100644 bin/tests/system/serve-stale/ns1/root.db
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create mode 100644 bin/tests/system/serve-stale/ns3/named.conf.in
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create mode 100644 bin/tests/system/serve-stale/prereq.sh
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create mode 100644 bin/tests/system/serve-stale/setup.sh
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create mode 100755 bin/tests/system/serve-stale/tests.sh
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diff --git a/bin/named/config.c b/bin/named/config.c
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index 63da4b0..b598f9b 100644
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--- a/bin/named/config.c
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+++ b/bin/named/config.c
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@@ -182,13 +182,14 @@ options {\n\
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#ifdef HAVE_LMDB
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" lmdb-mapsize 32M;\n"
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#endif
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-" max-acache-size 16M;\n\
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- max-cache-size 90%;\n\
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+" max-cache-size 90%;\n\
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+ max-acache-size 16M;\n\
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max-cache-ttl 604800; /* 1 week */\n\
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max-clients-per-query 100;\n\
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max-ncache-ttl 10800; /* 3 hours */\n\
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max-recursion-depth 7;\n\
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max-recursion-queries 75;\n\
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+ max-stale-ttl 604800; /* 1 week */\n\
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message-compression yes;\n\
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# min-roots <obsolete>;\n\
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minimal-any false;\n\
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@@ -203,10 +204,14 @@ options {\n\
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request-expire true;\n\
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request-ixfr true;\n\
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require-server-cookie no;\n\
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+ resolver-nonbackoff-tries 3;\n\
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+ resolver-retry-interval 800; /* in milliseconds */\n\
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# rfc2308-type1 <obsolete>;\n\
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root-key-sentinel yes;\n\
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servfail-ttl 1;\n\
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# sortlist <none>\n\
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+ stale-answer-enable false;\n\
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+ stale-answer-ttl 1; /* 1 second */\n\
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# topology <none>\n\
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transfer-format many-answers;\n\
|
|
|
|
v6-bias 50;\n\
|
|
|
|
diff --git a/bin/named/control.c b/bin/named/control.c
|
|
|
|
index df23c26..8b79850 100644
|
|
|
|
--- a/bin/named/control.c
|
|
|
|
+++ b/bin/named/control.c
|
|
|
|
@@ -282,6 +282,8 @@ ns_control_docommand(isccc_sexpr_t *message, bool readonly,
|
|
|
|
result = ns_server_validation(ns_g_server, lex, text);
|
|
|
|
} else if (command_compare(command, NS_COMMAND_ZONESTATUS)) {
|
|
|
|
result = ns_server_zonestatus(ns_g_server, lex, text);
|
|
|
|
+ } else if (command_compare(command, NS_COMMAND_SERVESTALE)) {
|
|
|
|
+ result = ns_server_servestale(ns_g_server, lex, text);
|
|
|
|
} else {
|
|
|
|
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
|
|
|
|
NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
|
|
|
|
diff --git a/bin/named/include/named/control.h b/bin/named/include/named/control.h
|
|
|
|
index 8705fdd..1634154 100644
|
|
|
|
--- a/bin/named/include/named/control.h
|
|
|
|
+++ b/bin/named/include/named/control.h
|
|
|
|
@@ -69,6 +69,7 @@
|
|
|
|
#define NS_COMMAND_MKEYS "managed-keys"
|
|
|
|
#define NS_COMMAND_DNSTAPREOPEN "dnstap-reopen"
|
|
|
|
#define NS_COMMAND_DNSTAP "dnstap"
|
|
|
|
+#define NS_COMMAND_SERVESTALE "serve-stale"
|
|
|
|
|
|
|
|
isc_result_t
|
|
|
|
ns_controls_create(ns_server_t *server, ns_controls_t **ctrlsp);
|
|
|
|
diff --git a/bin/named/include/named/log.h b/bin/named/include/named/log.h
|
|
|
|
index 56bfcd4..cd8db60 100644
|
|
|
|
--- a/bin/named/include/named/log.h
|
|
|
|
+++ b/bin/named/include/named/log.h
|
|
|
|
@@ -32,6 +32,7 @@
|
|
|
|
#define NS_LOGCATEGORY_UPDATE_SECURITY (&ns_g_categories[6])
|
|
|
|
#define NS_LOGCATEGORY_QUERY_ERRORS (&ns_g_categories[7])
|
|
|
|
#define NS_LOGCATEGORY_TAT (&ns_g_categories[8])
|
|
|
|
+#define NS_LOGCATEGORY_SERVE_STALE (&ns_g_categories[9])
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Backwards compatibility.
|
|
|
|
diff --git a/bin/named/include/named/query.h b/bin/named/include/named/query.h
|
|
|
|
index 9661f56..445b578 100644
|
|
|
|
--- a/bin/named/include/named/query.h
|
|
|
|
+++ b/bin/named/include/named/query.h
|
|
|
|
@@ -35,6 +35,18 @@ typedef struct ns_dbversion {
|
|
|
|
ISC_LINK(struct ns_dbversion) link;
|
|
|
|
} ns_dbversion_t;
|
|
|
|
|
|
|
|
+/*%
|
|
|
|
+ * nameserver recursion parameters, to uniquely identify a recursion
|
|
|
|
+ * query; this is used to detect a recursion loop
|
|
|
|
+ */
|
|
|
|
+typedef struct ns_query_recparam {
|
|
|
|
+ dns_rdatatype_t qtype;
|
|
|
|
+ dns_name_t * qname;
|
|
|
|
+ dns_fixedname_t fqname;
|
|
|
|
+ dns_name_t * qdomain;
|
|
|
|
+ dns_fixedname_t fqdomain;
|
|
|
|
+} ns_query_recparam_t;
|
|
|
|
+
|
|
|
|
/*% nameserver query structure */
|
|
|
|
struct ns_query {
|
|
|
|
unsigned int attributes;
|
|
|
|
@@ -63,6 +75,7 @@ struct ns_query {
|
|
|
|
unsigned int dns64_aaaaoklen;
|
|
|
|
unsigned int dns64_options;
|
|
|
|
unsigned int dns64_ttl;
|
|
|
|
+
|
|
|
|
struct {
|
|
|
|
dns_db_t * db;
|
|
|
|
dns_zone_t * zone;
|
|
|
|
@@ -76,6 +89,8 @@ struct ns_query {
|
|
|
|
bool authoritative;
|
|
|
|
bool is_zone;
|
|
|
|
} redirect;
|
|
|
|
+
|
|
|
|
+ ns_query_recparam_t recparam;
|
|
|
|
dns_keytag_t root_key_sentinel_keyid;
|
|
|
|
bool root_key_sentinel_is_ta;
|
|
|
|
bool root_key_sentinel_not_ta;
|
|
|
|
diff --git a/bin/named/include/named/server.h b/bin/named/include/named/server.h
|
2020-07-28 07:51:19 +00:00
|
|
|
index c92922e..588bf2d 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/bin/named/include/named/server.h
|
|
|
|
+++ b/bin/named/include/named/server.h
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -226,7 +226,10 @@ enum {
|
2020-01-21 22:30:08 +00:00
|
|
|
|
2020-07-28 07:51:19 +00:00
|
|
|
dns_nsstatscounter_reclimitdropped = 58,
|
2020-01-21 22:30:08 +00:00
|
|
|
|
2020-07-28 07:51:19 +00:00
|
|
|
- dns_nsstatscounter_max = 59
|
|
|
|
+ dns_nsstatscounter_trystale = 59,
|
|
|
|
+ dns_nsstatscounter_usedstale = 60,
|
2020-01-21 22:30:08 +00:00
|
|
|
+
|
2020-07-28 07:51:19 +00:00
|
|
|
+ dns_nsstatscounter_max = 61
|
2020-01-21 22:30:08 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
/*%
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -765,4 +768,12 @@ ns_server_mkeys(ns_server_t *server, isc_lex_t *lex, isc_buffer_t **text);
|
2020-01-21 22:30:08 +00:00
|
|
|
isc_result_t
|
|
|
|
ns_server_dnstap(ns_server_t *server, isc_lex_t *lex, isc_buffer_t **text);
|
|
|
|
|
|
|
|
+
|
|
|
|
+/*%
|
|
|
|
+ * Control whether stale answers are served or not when configured in
|
|
|
|
+ * named.conf.
|
|
|
|
+ */
|
|
|
|
+isc_result_t
|
|
|
|
+ns_server_servestale(ns_server_t *server, isc_lex_t *lex,
|
|
|
|
+ isc_buffer_t **text);
|
|
|
|
#endif /* NAMED_SERVER_H */
|
|
|
|
diff --git a/bin/named/log.c b/bin/named/log.c
|
|
|
|
index 3aa25e9..12f178b 100644
|
|
|
|
--- a/bin/named/log.c
|
|
|
|
+++ b/bin/named/log.c
|
|
|
|
@@ -38,6 +38,7 @@ static isc_logcategory_t categories[] = {
|
|
|
|
{ "update-security", 0 },
|
|
|
|
{ "query-errors", 0 },
|
|
|
|
{ "trust-anchor-telemetry", 0 },
|
|
|
|
+ { "serve-stale", 0 },
|
|
|
|
{ NULL, 0 }
|
|
|
|
};
|
|
|
|
|
|
|
|
diff --git a/bin/named/query.c b/bin/named/query.c
|
2020-07-28 07:51:19 +00:00
|
|
|
index 25eeced..162e4ea 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/bin/named/query.c
|
|
|
|
+++ b/bin/named/query.c
|
|
|
|
@@ -125,10 +125,14 @@
|
|
|
|
#define REDIRECT(c) (((c)->query.attributes & \
|
|
|
|
NS_QUERYATTR_REDIRECT) != 0)
|
|
|
|
|
|
|
|
-/*% No QNAME Proof? */
|
|
|
|
+/*% Does the rdataset 'r' have an attached 'No QNAME Proof'? */
|
|
|
|
#define NOQNAME(r) (((r)->attributes & \
|
|
|
|
DNS_RDATASETATTR_NOQNAME) != 0)
|
|
|
|
|
|
|
|
+/*% Does the rdataset 'r' contain a stale answer? */
|
|
|
|
+#define STALE(r) (((r)->attributes & \
|
|
|
|
+ DNS_RDATASETATTR_STALE) != 0)
|
|
|
|
+
|
|
|
|
#ifdef WANT_QUERYTRACE
|
|
|
|
static inline void
|
|
|
|
client_trace(ns_client_t *client, int level, const char *message) {
|
|
|
|
@@ -217,6 +221,10 @@ static bool
|
|
|
|
rpz_ck_dnssec(ns_client_t *client, isc_result_t qresult,
|
|
|
|
dns_rdataset_t *rdataset, dns_rdataset_t *sigrdataset);
|
|
|
|
|
|
|
|
+static void
|
|
|
|
+recparam_update(ns_query_recparam_t *param, dns_rdatatype_t qtype,
|
|
|
|
+ const dns_name_t *qname, const dns_name_t *qdomain);
|
|
|
|
+
|
|
|
|
/*%
|
|
|
|
* Increment query statistics counters.
|
|
|
|
*/
|
|
|
|
@@ -470,6 +478,7 @@ query_reset(ns_client_t *client, bool everything) {
|
|
|
|
client->query.isreferral = false;
|
|
|
|
client->query.dns64_options = 0;
|
|
|
|
client->query.dns64_ttl = UINT32_MAX;
|
|
|
|
+ recparam_update(&client->query.recparam, 0, NULL, NULL);
|
|
|
|
client->query.root_key_sentinel_keyid = 0;
|
|
|
|
client->query.root_key_sentinel_is_ta = false;
|
|
|
|
client->query.root_key_sentinel_not_ta = false;
|
|
|
|
@@ -4254,6 +4263,54 @@ query_prefetch(ns_client_t *client, dns_name_t *qname,
|
|
|
|
dns_rdataset_clearprefetch(rdataset);
|
|
|
|
}
|
|
|
|
|
|
|
|
+/*%
|
|
|
|
+ * Check whether the recursion parameters in 'param' match the current query's
|
|
|
|
+ * recursion parameters provided in 'qtype', 'qname', and 'qdomain'.
|
|
|
|
+ */
|
|
|
|
+static bool
|
|
|
|
+recparam_match(const ns_query_recparam_t *param, dns_rdatatype_t qtype,
|
|
|
|
+ const dns_name_t *qname, const dns_name_t *qdomain)
|
|
|
|
+{
|
|
|
|
+ REQUIRE(param != NULL);
|
|
|
|
+
|
|
|
|
+ return (param->qtype == qtype &&
|
|
|
|
+ param->qname != NULL && qname != NULL &&
|
|
|
|
+ param->qdomain != NULL && qdomain != NULL &&
|
|
|
|
+ dns_name_equal(param->qname, qname) &&
|
|
|
|
+ dns_name_equal(param->qdomain, qdomain));
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+/*%
|
|
|
|
+ * Update 'param' with current query's recursion parameters provided in
|
|
|
|
+ * 'qtype', 'qname', and 'qdomain'.
|
|
|
|
+ */
|
|
|
|
+static void
|
|
|
|
+recparam_update(ns_query_recparam_t *param, dns_rdatatype_t qtype,
|
|
|
|
+ const dns_name_t *qname, const dns_name_t *qdomain)
|
|
|
|
+{
|
|
|
|
+ isc_result_t result;
|
|
|
|
+
|
|
|
|
+ REQUIRE(param != NULL);
|
|
|
|
+
|
|
|
|
+ param->qtype = qtype;
|
|
|
|
+
|
|
|
|
+ if (qname == NULL) {
|
|
|
|
+ param->qname = NULL;
|
|
|
|
+ } else {
|
|
|
|
+ param->qname = dns_fixedname_initname(¶m->fqname);
|
|
|
|
+ result = dns_name_copy(qname, param->qname, NULL);
|
|
|
|
+ RUNTIME_CHECK(result == ISC_R_SUCCESS);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ if (qdomain == NULL) {
|
|
|
|
+ param->qdomain = NULL;
|
|
|
|
+ } else {
|
|
|
|
+ param->qdomain = dns_fixedname_initname(¶m->fqdomain);
|
|
|
|
+ result = dns_name_copy(qdomain, param->qdomain, NULL);
|
|
|
|
+ RUNTIME_CHECK(result == ISC_R_SUCCESS);
|
|
|
|
+ }
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
static isc_result_t
|
|
|
|
query_recurse(ns_client_t *client, dns_rdatatype_t qtype, dns_name_t *qname,
|
|
|
|
dns_name_t *qdomain, dns_rdataset_t *nameservers,
|
|
|
|
@@ -4263,6 +4320,19 @@ query_recurse(ns_client_t *client, dns_rdatatype_t qtype, dns_name_t *qname,
|
|
|
|
dns_rdataset_t *rdataset, *sigrdataset;
|
|
|
|
isc_sockaddr_t *peeraddr;
|
|
|
|
|
|
|
|
+ /*
|
|
|
|
+ * Check recursion parameters from the previous query to see if they
|
|
|
|
+ * match. If not, update recursion parameters and proceed.
|
|
|
|
+ */
|
|
|
|
+ if (recparam_match(&client->query.recparam, qtype, qname, qdomain)) {
|
|
|
|
+ ns_client_log(client, NS_LOGCATEGORY_CLIENT,
|
|
|
|
+ NS_LOGMODULE_QUERY, ISC_LOG_INFO,
|
|
|
|
+ "recursion loop detected");
|
|
|
|
+ return (ISC_R_FAILURE);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ recparam_update(&client->query.recparam, qtype, qname, qdomain);
|
|
|
|
+
|
|
|
|
if (!resuming)
|
|
|
|
inc_stats(client, dns_nsstatscounter_recursion);
|
|
|
|
|
|
|
|
@@ -6780,6 +6850,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
int line = -1;
|
|
|
|
bool dns64_exclude, dns64, rpz;
|
|
|
|
bool nxrewrite = false;
|
|
|
|
+ bool want_stale = false;
|
|
|
|
bool redirected = false;
|
|
|
|
dns_clientinfomethods_t cm;
|
|
|
|
dns_clientinfo_t ci;
|
|
|
|
@@ -7089,6 +7160,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
type = qtype;
|
|
|
|
|
|
|
|
restart:
|
|
|
|
+ // query_start
|
|
|
|
CTRACE(ISC_LOG_DEBUG(3), "query_find: restart");
|
|
|
|
want_restart = false;
|
|
|
|
authoritative = false;
|
|
|
|
@@ -7233,6 +7305,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
}
|
|
|
|
|
|
|
|
db_find:
|
|
|
|
+ // query_lookup
|
|
|
|
CTRACE(ISC_LOG_DEBUG(3), "query_find: db_find");
|
|
|
|
/*
|
|
|
|
* We'll need some resources...
|
|
|
|
@@ -7290,6 +7363,35 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
if (!is_zone)
|
|
|
|
dns_cache_updatestats(client->view->cache, result);
|
|
|
|
|
|
|
|
+ if (want_stale) {
|
|
|
|
+ char namebuf[DNS_NAME_FORMATSIZE];
|
|
|
|
+ bool success;
|
|
|
|
+
|
|
|
|
+ client->query.dboptions &= ~DNS_DBFIND_STALEOK;
|
|
|
|
+ want_stale = false;
|
|
|
|
+
|
|
|
|
+ if (dns_rdataset_isassociated(rdataset) &&
|
|
|
|
+ dns_rdataset_count(rdataset) > 0 &&
|
|
|
|
+ STALE(rdataset)) {
|
|
|
|
+ rdataset->ttl = client->view->staleanswerttl;
|
|
|
|
+ success = true;
|
|
|
|
+ } else {
|
|
|
|
+ success = false;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ dns_name_format(client->query.qname,
|
|
|
|
+ namebuf, sizeof(namebuf));
|
|
|
|
+ isc_log_write(ns_g_lctx, NS_LOGCATEGORY_SERVE_STALE,
|
|
|
|
+ NS_LOGMODULE_QUERY, ISC_LOG_INFO,
|
|
|
|
+ "%s resolver failure, stale answer %s",
|
|
|
|
+ namebuf, success ? "used" : "unavailable");
|
|
|
|
+
|
|
|
|
+ if (!success) {
|
|
|
|
+ QUERY_ERROR(DNS_R_SERVFAIL);
|
|
|
|
+ goto cleanup;
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
resume:
|
|
|
|
CTRACE(ISC_LOG_DEBUG(3), "query_find: resume");
|
|
|
|
|
|
|
|
@@ -7635,6 +7737,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
* The cache doesn't even have the root NS. Get them from
|
|
|
|
* the hints DB.
|
|
|
|
*/
|
|
|
|
+ // query_notfound
|
|
|
|
INSIST(!is_zone);
|
|
|
|
if (db != NULL)
|
|
|
|
dns_db_detach(&db);
|
|
|
|
@@ -7697,12 +7800,14 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
*/
|
|
|
|
/* FALLTHROUGH */
|
|
|
|
case DNS_R_DELEGATION:
|
|
|
|
+ // query_delegation
|
|
|
|
authoritative = false;
|
|
|
|
if (is_zone) {
|
|
|
|
/*
|
|
|
|
* Look to see if we are authoritative for the
|
|
|
|
* child zone if the query type is DS.
|
|
|
|
*/
|
|
|
|
+ // query_zone_delegation
|
|
|
|
if (!RECURSIONOK(client) &&
|
|
|
|
(options & DNS_GETDB_NOEXACT) != 0 &&
|
|
|
|
qtype == dns_rdatatype_ds) {
|
|
|
|
@@ -8089,6 +8194,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
false, true);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
+ // query_nxdomain
|
|
|
|
if (dns_rdataset_isassociated(rdataset)) {
|
|
|
|
/*
|
|
|
|
* If we've got a NSEC record, we need to save the
|
|
|
|
@@ -8409,7 +8515,8 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
/*
|
|
|
|
* If we have a zero ttl from the cache refetch it.
|
|
|
|
*/
|
|
|
|
- if (!is_zone && !resuming && rdataset->ttl == 0 &&
|
|
|
|
+ // query_cname
|
|
|
|
+ if (!is_zone && !resuming && !STALE(rdataset) && rdataset->ttl == 0 &&
|
|
|
|
RECURSIONOK(client))
|
|
|
|
{
|
|
|
|
if (dns_rdataset_isassociated(rdataset))
|
|
|
|
@@ -8627,7 +8734,11 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
"query_find: unexpected error after resuming: %s",
|
|
|
|
isc_result_totext(result));
|
|
|
|
CTRACE(ISC_LOG_ERROR, errmsg);
|
|
|
|
- QUERY_ERROR(DNS_R_SERVFAIL);
|
|
|
|
+ if (resuming) {
|
|
|
|
+ want_stale = true;
|
|
|
|
+ } else {
|
|
|
|
+ QUERY_ERROR(DNS_R_SERVFAIL);
|
|
|
|
+ }
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
@@ -8883,7 +8994,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
/*
|
|
|
|
* If we have a zero ttl from the cache refetch it.
|
|
|
|
*/
|
|
|
|
- if (!is_zone && !resuming && rdataset->ttl == 0 &&
|
|
|
|
+ if (!is_zone && !resuming && !STALE(rdataset) && rdataset->ttl == 0 &&
|
|
|
|
RECURSIONOK(client))
|
|
|
|
{
|
|
|
|
if (dns_rdataset_isassociated(rdataset))
|
|
|
|
@@ -8894,6 +9005,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
if (node != NULL)
|
|
|
|
dns_db_detachnode(db, &node);
|
|
|
|
|
|
|
|
+ // query_respond
|
|
|
|
INSIST(!REDIRECT(client));
|
|
|
|
result = query_recurse(client, qtype,
|
|
|
|
client->query.qname,
|
|
|
|
@@ -9174,6 +9286,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
dns_fixedname_name(&wildcardname),
|
|
|
|
true, false);
|
|
|
|
cleanup:
|
|
|
|
+ // query_done
|
|
|
|
CTRACE(ISC_LOG_DEBUG(3), "query_find: cleanup");
|
|
|
|
/*
|
|
|
|
* General cleanup.
|
|
|
|
@@ -9230,6 +9343,49 @@ query_find(ns_client_t *client, dns_fetchevent_t *event, dns_rdatatype_t qtype)
|
|
|
|
goto restart;
|
|
|
|
}
|
|
|
|
|
|
|
|
+ if (want_stale) {
|
|
|
|
+ dns_ttl_t stale_ttl = 0;
|
|
|
|
+ isc_result_t result;
|
|
|
|
+ bool staleanswersok = false;
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ * Stale answers only make sense if stale_ttl > 0 but
|
|
|
|
+ * we want rndc to be able to control returning stale
|
|
|
|
+ * answers if they are configured.
|
|
|
|
+ */
|
|
|
|
+ dns_db_attach(client->view->cachedb, &db);
|
|
|
|
+ result = dns_db_getservestalettl(db, &stale_ttl);
|
|
|
|
+ if (result == ISC_R_SUCCESS && stale_ttl > 0) {
|
|
|
|
+ switch (client->view->staleanswersok) {
|
|
|
|
+ case dns_stale_answer_yes:
|
|
|
|
+ staleanswersok = true;
|
|
|
|
+ break;
|
|
|
|
+ case dns_stale_answer_conf:
|
|
|
|
+ staleanswersok =
|
|
|
|
+ client->view->staleanswersenable;
|
|
|
|
+ break;
|
|
|
|
+ case dns_stale_answer_no:
|
|
|
|
+ staleanswersok = false;
|
|
|
|
+ break;
|
|
|
|
+ }
|
|
|
|
+ } else {
|
|
|
|
+ staleanswersok = false;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ if (staleanswersok) {
|
|
|
|
+ client->query.dboptions |= DNS_DBFIND_STALEOK;
|
|
|
|
+ inc_stats(client, dns_nsstatscounter_trystale);
|
|
|
|
+ if (client->query.fetch != NULL)
|
|
|
|
+ dns_resolver_destroyfetch(
|
|
|
|
+ &client->query.fetch);
|
|
|
|
+ goto db_find;
|
|
|
|
+ }
|
|
|
|
+ dns_db_detach(&db);
|
|
|
|
+ want_stale = false;
|
|
|
|
+ QUERY_ERROR(DNS_R_SERVFAIL);
|
|
|
|
+ goto cleanup;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
if (eresult != ISC_R_SUCCESS &&
|
|
|
|
(!PARTIALANSWER(client) || WANTRECURSION(client)
|
|
|
|
|| eresult == DNS_R_DROP)) {
|
|
|
|
diff --git a/bin/named/server.c b/bin/named/server.c
|
2020-07-28 07:51:19 +00:00
|
|
|
index 1f23cf0..1fa836f 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/bin/named/server.c
|
|
|
|
+++ b/bin/named/server.c
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1720,7 +1720,8 @@ static bool
|
2020-01-21 22:30:08 +00:00
|
|
|
cache_sharable(dns_view_t *originview, dns_view_t *view,
|
|
|
|
bool new_zero_no_soattl,
|
|
|
|
unsigned int new_cleaning_interval,
|
|
|
|
- uint64_t new_max_cache_size)
|
|
|
|
+ uint64_t new_max_cache_size,
|
|
|
|
+ uint32_t new_stale_ttl)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* If the cache cannot even reused for the same view, it cannot be
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1735,6 +1736,7 @@ cache_sharable(dns_view_t *originview, dns_view_t *view,
|
2020-01-21 22:30:08 +00:00
|
|
|
*/
|
|
|
|
if (dns_cache_getcleaninginterval(originview->cache) !=
|
|
|
|
new_cleaning_interval ||
|
|
|
|
+ dns_cache_getservestalettl(originview->cache) != new_stale_ttl ||
|
|
|
|
dns_cache_getcachesize(originview->cache) != new_max_cache_size) {
|
|
|
|
return (false);
|
|
|
|
}
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -3290,6 +3292,7 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
|
2020-01-21 22:30:08 +00:00
|
|
|
size_t max_acache_size;
|
|
|
|
size_t max_adb_size;
|
|
|
|
uint32_t lame_ttl, fail_ttl;
|
|
|
|
+ uint32_t max_stale_ttl;
|
|
|
|
dns_tsig_keyring_t *ring = NULL;
|
|
|
|
dns_view_t *pview = NULL; /* Production view */
|
|
|
|
isc_mem_t *cmctx = NULL, *hmctx = NULL;
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -3318,6 +3321,7 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
|
2020-01-21 22:30:08 +00:00
|
|
|
bool old_rpz_ok = false;
|
|
|
|
isc_dscp_t dscp4 = -1, dscp6 = -1;
|
|
|
|
dns_dyndbctx_t *dctx = NULL;
|
|
|
|
+ unsigned int resolver_param;
|
|
|
|
|
|
|
|
REQUIRE(DNS_VIEW_VALID(view));
|
|
|
|
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -3732,6 +3736,24 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
|
2020-01-21 22:30:08 +00:00
|
|
|
if (view->maxncachettl > 7 * 24 * 3600)
|
|
|
|
view->maxncachettl = 7 * 24 * 3600;
|
|
|
|
|
|
|
|
+ obj = NULL;
|
|
|
|
+ result = ns_config_get(maps, "max-stale-ttl", &obj);
|
|
|
|
+ INSIST(result == ISC_R_SUCCESS);
|
|
|
|
+ max_stale_ttl = cfg_obj_asuint32(obj);
|
|
|
|
+
|
|
|
|
+ obj = NULL;
|
|
|
|
+ result = ns_config_get(maps, "stale-answer-enable", &obj);
|
|
|
|
+ INSIST(result == ISC_R_SUCCESS);
|
|
|
|
+ view->staleanswersenable = cfg_obj_asboolean(obj);
|
|
|
|
+
|
|
|
|
+ result = dns_viewlist_find(&ns_g_server->viewlist, view->name,
|
|
|
|
+ view->rdclass, &pview);
|
|
|
|
+ if (result == ISC_R_SUCCESS) {
|
|
|
|
+ view->staleanswersok = pview->staleanswersok;
|
|
|
|
+ dns_view_detach(&pview);
|
|
|
|
+ } else
|
|
|
|
+ view->staleanswersok = dns_stale_answer_conf;
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* Configure the view's cache.
|
|
|
|
*
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -3765,7 +3787,8 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
|
2020-01-21 22:30:08 +00:00
|
|
|
nsc = cachelist_find(cachelist, cachename, view->rdclass);
|
|
|
|
if (nsc != NULL) {
|
|
|
|
if (!cache_sharable(nsc->primaryview, view, zero_no_soattl,
|
|
|
|
- cleaning_interval, max_cache_size)) {
|
|
|
|
+ cleaning_interval, max_cache_size,
|
|
|
|
+ max_stale_ttl)) {
|
|
|
|
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
|
|
|
|
NS_LOGMODULE_SERVER, ISC_LOG_ERROR,
|
|
|
|
"views %s and %s can't share the cache "
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -3864,9 +3887,15 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
|
2020-01-21 22:30:08 +00:00
|
|
|
|
|
|
|
dns_cache_setcleaninginterval(cache, cleaning_interval);
|
|
|
|
dns_cache_setcachesize(cache, max_cache_size);
|
|
|
|
+ dns_cache_setservestalettl(cache, max_stale_ttl);
|
|
|
|
|
|
|
|
dns_cache_detach(&cache);
|
|
|
|
|
|
|
|
+ obj = NULL;
|
|
|
|
+ result = ns_config_get(maps, "stale-answer-ttl", &obj);
|
|
|
|
+ INSIST(result == ISC_R_SUCCESS);
|
|
|
|
+ view->staleanswerttl = ISC_MAX(cfg_obj_asuint32(obj), 1);
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* Resolver.
|
|
|
|
*
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -4055,6 +4084,21 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
|
2020-01-21 22:30:08 +00:00
|
|
|
maxbits = 4096;
|
|
|
|
view->maxbits = maxbits;
|
|
|
|
|
|
|
|
+ /*
|
|
|
|
+ * Set resolver retry parameters.
|
|
|
|
+ */
|
|
|
|
+ obj = NULL;
|
|
|
|
+ CHECK(ns_config_get(maps, "resolver-retry-interval", &obj));
|
|
|
|
+ resolver_param = cfg_obj_asuint32(obj);
|
|
|
|
+ if (resolver_param > 0)
|
|
|
|
+ dns_resolver_setretryinterval(view->resolver, resolver_param);
|
|
|
|
+
|
|
|
|
+ obj = NULL;
|
|
|
|
+ CHECK(ns_config_get(maps, "resolver-nonbackoff-tries", &obj));
|
|
|
|
+ resolver_param = cfg_obj_asuint32(obj);
|
|
|
|
+ if (resolver_param > 0)
|
|
|
|
+ dns_resolver_setnonbackofftries(view->resolver, resolver_param);
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* Set supported DNSSEC algorithms.
|
|
|
|
*/
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -14456,3 +14500,132 @@ ns_server_dnstap(ns_server_t *server, isc_lex_t *lex, isc_buffer_t **text) {
|
2020-01-21 22:30:08 +00:00
|
|
|
return (ISC_R_NOTIMPLEMENTED);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
+
|
|
|
|
+isc_result_t
|
|
|
|
+ns_server_servestale(ns_server_t *server, isc_lex_t *lex,
|
|
|
|
+ isc_buffer_t **text)
|
|
|
|
+{
|
|
|
|
+ char *ptr, *classtxt, *viewtxt = NULL;
|
|
|
|
+ char msg[128];
|
|
|
|
+ dns_rdataclass_t rdclass = dns_rdataclass_in;
|
|
|
|
+ dns_view_t *view;
|
|
|
|
+ bool found = false;
|
|
|
|
+ dns_stale_answer_t staleanswersok = dns_stale_answer_conf;
|
|
|
|
+ bool wantstatus = false;
|
|
|
|
+ isc_result_t result = ISC_R_SUCCESS;
|
|
|
|
+
|
|
|
|
+ /* Skip the command name. */
|
|
|
|
+ ptr = next_token(lex, text);
|
|
|
|
+ if (ptr == NULL)
|
|
|
|
+ return (ISC_R_UNEXPECTEDEND);
|
|
|
|
+
|
|
|
|
+ ptr = next_token(lex, NULL);
|
|
|
|
+ if (ptr == NULL)
|
|
|
|
+ return (ISC_R_UNEXPECTEDEND);
|
|
|
|
+
|
|
|
|
+ if (strcasecmp(ptr, "on") == 0 || strcasecmp(ptr, "yes") == 0) {
|
|
|
|
+ staleanswersok = dns_stale_answer_yes;
|
|
|
|
+ } else if (strcasecmp(ptr, "off") == 0 || strcasecmp(ptr, "no") == 0) {
|
|
|
|
+ staleanswersok = dns_stale_answer_no;
|
|
|
|
+ } else if (strcasecmp(ptr, "reset") == 0) {
|
|
|
|
+ staleanswersok = dns_stale_answer_conf;
|
|
|
|
+ } else if (strcasecmp(ptr, "status") == 0) {
|
|
|
|
+ wantstatus = true;
|
|
|
|
+ } else
|
|
|
|
+ return (DNS_R_SYNTAX);
|
|
|
|
+
|
|
|
|
+ /* Look for the optional class name. */
|
|
|
|
+ classtxt = next_token(lex, text);
|
|
|
|
+ if (classtxt != NULL) {
|
|
|
|
+ /* Look for the optional view name. */
|
|
|
|
+ viewtxt = next_token(lex, text);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ if (classtxt != NULL) {
|
|
|
|
+ isc_textregion_t r;
|
|
|
|
+
|
|
|
|
+ r.base = classtxt;
|
|
|
|
+ r.length = strlen(classtxt);
|
|
|
|
+ result = dns_rdataclass_fromtext(&rdclass, &r);
|
|
|
|
+ if (result != ISC_R_SUCCESS) {
|
|
|
|
+ if (viewtxt == NULL) {
|
|
|
|
+ viewtxt = classtxt;
|
|
|
|
+ classtxt = NULL;
|
|
|
|
+ result = ISC_R_SUCCESS;
|
|
|
|
+ } else {
|
|
|
|
+ snprintf(msg, sizeof(msg),
|
|
|
|
+ "unknown class '%s'", classtxt);
|
|
|
|
+ (void) putstr(text, msg);
|
|
|
|
+ goto cleanup;
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ result = isc_task_beginexclusive(server->task);
|
|
|
|
+ RUNTIME_CHECK(result == ISC_R_SUCCESS);
|
|
|
|
+
|
|
|
|
+ for (view = ISC_LIST_HEAD(server->viewlist);
|
|
|
|
+ view != NULL;
|
|
|
|
+ view = ISC_LIST_NEXT(view, link))
|
|
|
|
+ {
|
|
|
|
+ dns_ttl_t stale_ttl = 0;
|
|
|
|
+ dns_db_t *db = NULL;
|
|
|
|
+
|
|
|
|
+ if (classtxt != NULL && rdclass != view->rdclass)
|
|
|
|
+ continue;
|
|
|
|
+
|
|
|
|
+ if (viewtxt != NULL && strcmp(view->name, viewtxt) != 0)
|
|
|
|
+ continue;
|
|
|
|
+
|
|
|
|
+ if (!wantstatus) {
|
|
|
|
+ view->staleanswersok = staleanswersok;
|
|
|
|
+ found = true;
|
|
|
|
+ continue;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ db = NULL;
|
|
|
|
+ dns_db_attach(view->cachedb, &db);
|
|
|
|
+ (void)dns_db_getservestalettl(db, &stale_ttl);
|
|
|
|
+ dns_db_detach(&db);
|
|
|
|
+ if (found)
|
|
|
|
+ CHECK(putstr(text, "\n"));
|
|
|
|
+ CHECK(putstr(text, view->name));
|
|
|
|
+ CHECK(putstr(text, ": "));
|
|
|
|
+ switch (view->staleanswersok) {
|
|
|
|
+ case dns_stale_answer_yes:
|
|
|
|
+ if (stale_ttl > 0)
|
|
|
|
+ CHECK(putstr(text, "on (rndc)"));
|
|
|
|
+ else
|
|
|
|
+ CHECK(putstr(text, "off (not-cached)"));
|
|
|
|
+ break;
|
|
|
|
+ case dns_stale_answer_no:
|
|
|
|
+ CHECK(putstr(text, "off (rndc)"));
|
|
|
|
+ break;
|
|
|
|
+ case dns_stale_answer_conf:
|
|
|
|
+ if (view->staleanswersenable && stale_ttl > 0)
|
|
|
|
+ CHECK(putstr(text, "on"));
|
|
|
|
+ else if (view->staleanswersenable)
|
|
|
|
+ CHECK(putstr(text, "off (not-cached)"));
|
|
|
|
+ else
|
|
|
|
+ CHECK(putstr(text, "off"));
|
|
|
|
+ break;
|
|
|
|
+ }
|
|
|
|
+ if (stale_ttl > 0) {
|
|
|
|
+ snprintf(msg, sizeof(msg),
|
|
|
|
+ " (stale-answer-ttl=%u max-stale-ttl=%u)",
|
|
|
|
+ view->staleanswerttl, stale_ttl);
|
|
|
|
+ CHECK(putstr(text, msg));
|
|
|
|
+ }
|
|
|
|
+ found = true;
|
|
|
|
+ }
|
|
|
|
+ isc_task_endexclusive(ns_g_server->task);
|
|
|
|
+
|
|
|
|
+ if (!found)
|
|
|
|
+ result = ISC_R_NOTFOUND;
|
|
|
|
+
|
|
|
|
+cleanup:
|
|
|
|
+ if (isc_buffer_usedlength(*text) > 0)
|
|
|
|
+ (void) putnull(text);
|
|
|
|
+
|
|
|
|
+ return (result);
|
|
|
|
+}
|
|
|
|
diff --git a/bin/named/statschannel.c b/bin/named/statschannel.c
|
2020-07-28 07:51:19 +00:00
|
|
|
index 4b8d972..8c68737 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/bin/named/statschannel.c
|
|
|
|
+++ b/bin/named/statschannel.c
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -300,6 +300,12 @@ init_desc(void) {
|
|
|
|
SET_NSSTATDESC(reclimitdropped,
|
|
|
|
"queries dropped due to recursive client limit",
|
|
|
|
"RecLimitDropped");
|
2020-01-21 22:30:08 +00:00
|
|
|
+ SET_NSSTATDESC(trystale,
|
|
|
|
+ "attempts to use stale cache data after lookup failure",
|
|
|
|
+ "QryTryStale");
|
|
|
|
+ SET_NSSTATDESC(usedstale,
|
|
|
|
+ "successful uses of stale cache data after lookup failure",
|
|
|
|
+ "QryUsedStale");
|
|
|
|
INSIST(i == dns_nsstatscounter_max);
|
|
|
|
|
|
|
|
/* Initialize resolver statistics */
|
|
|
|
diff --git a/bin/rndc/rndc.c b/bin/rndc/rndc.c
|
|
|
|
index 8083654..d519983 100644
|
|
|
|
--- a/bin/rndc/rndc.c
|
|
|
|
+++ b/bin/rndc/rndc.c
|
|
|
|
@@ -160,6 +160,8 @@ command is one of the following:\n\
|
|
|
|
scan Scan available network interfaces for changes.\n\
|
|
|
|
secroots [view ...]\n\
|
|
|
|
Write security roots to the secroots file.\n\
|
|
|
|
+ serve-stale ( yes | no | reset ) [class [view]]\n\
|
|
|
|
+ Control whether stale answers are returned\n\
|
|
|
|
showzone zone [class [view]]\n\
|
|
|
|
Print a zone's configuration.\n\
|
|
|
|
sign zone [class [view]]\n\
|
|
|
|
diff --git a/bin/rndc/rndc.docbook b/bin/rndc/rndc.docbook
|
2020-07-28 07:51:19 +00:00
|
|
|
index e14a17e..eaf32d3 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/bin/rndc/rndc.docbook
|
|
|
|
+++ b/bin/rndc/rndc.docbook
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -689,6 +689,25 @@
|
2020-01-21 22:30:08 +00:00
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
+ <varlistentry>
|
|
|
|
+ <term><userinput>serve-stale ( on | off | reset | status) <optional><replaceable>class</replaceable> <optional><replaceable>view</replaceable></optional></optional></userinput></term>
|
|
|
|
+ <listitem>
|
|
|
|
+ <para>
|
|
|
|
+ Enable, disable, or reset the serving of stale answers
|
|
|
|
+ as configured in named.conf. Serving of stale answers
|
|
|
|
+ will remain disabled across <filename>named.conf</filename>
|
|
|
|
+ reloads if disabled via rndc until it is reset via rndc.
|
|
|
|
+ </para>
|
|
|
|
+ <para>
|
|
|
|
+ Status will report whether serving of stale answers is
|
|
|
|
+ currently enabled, disabled or not configured for a
|
|
|
|
+ view. If serving of stale records is configured then
|
|
|
|
+ the values of stale-answer-ttl and max-stale-ttl are
|
|
|
|
+ reported.
|
|
|
|
+ </para>
|
|
|
|
+ </listitem>
|
|
|
|
+ </varlistentry>
|
|
|
|
+
|
|
|
|
<varlistentry>
|
|
|
|
<term><userinput>secroots <optional>-</optional> <optional><replaceable>view ...</replaceable></optional></userinput></term>
|
|
|
|
<listitem>
|
|
|
|
diff --git a/bin/tests/system/chain/prereq.sh b/bin/tests/system/chain/prereq.sh
|
|
|
|
index f3f1939..9ff3f07 100644
|
|
|
|
--- a/bin/tests/system/chain/prereq.sh
|
|
|
|
+++ b/bin/tests/system/chain/prereq.sh
|
|
|
|
@@ -48,3 +48,10 @@ else
|
|
|
|
echo_i "This test requires the Net::DNS::Nameserver library." >&2
|
|
|
|
exit 1
|
|
|
|
fi
|
|
|
|
+if $PERL -e 'use Net::DNS::Nameserver;' 2>/dev/null
|
|
|
|
+then
|
|
|
|
+ :
|
|
|
|
+else
|
|
|
|
+ echo "I:This test requires the Net::DNS::Nameserver library." >&2
|
|
|
|
+ exit 1
|
|
|
|
+fi
|
|
|
|
diff --git a/bin/tests/system/conf.sh.in b/bin/tests/system/conf.sh.in
|
2020-07-28 07:51:19 +00:00
|
|
|
index 22749b9..a247fd5 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/bin/tests/system/conf.sh.in
|
|
|
|
+++ b/bin/tests/system/conf.sh.in
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -128,7 +128,7 @@ PARALLELDIRS="dnssec rpzrecurse \
|
2020-01-21 22:30:08 +00:00
|
|
|
reclimit redirect resolver rndc rootkeysentinel rpz \
|
|
|
|
rrchecker rrl rrsetorder rsabigexponent runtime \
|
|
|
|
sfcache smartsign sortlist \
|
|
|
|
- spf staticstub statistics statschannel stub \
|
|
|
|
+ spf serve-stale staticstub statistics statschannel stub \
|
|
|
|
tcp tsig tsiggss \
|
|
|
|
unknown upforwd verify views wildcard \
|
|
|
|
xfer xferquota zero zonechecks"
|
|
|
|
diff --git a/bin/tests/system/dyndb/driver/db.c b/bin/tests/system/dyndb/driver/db.c
|
|
|
|
index 02aa6ab..a77c7de 100644
|
|
|
|
--- a/bin/tests/system/dyndb/driver/db.c
|
|
|
|
+++ b/bin/tests/system/dyndb/driver/db.c
|
|
|
|
@@ -629,6 +629,8 @@ static dns_dbmethods_t sampledb_methods = {
|
|
|
|
hashsize,
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
+ NULL,
|
|
|
|
+ NULL,
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Auxiliary driver functions. */
|
|
|
|
diff --git a/bin/tests/system/serve-stale/.gitignore b/bin/tests/system/serve-stale/.gitignore
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..2272eef
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/.gitignore
|
|
|
|
@@ -0,0 +1,11 @@
|
|
|
|
+/ans2/ans.pid
|
|
|
|
+/ans2/ans.pl
|
|
|
|
+/dig.out*
|
|
|
|
+/ns1/named.conf
|
|
|
|
+/ns3/named.conf
|
|
|
|
+/ns3/root.bk
|
|
|
|
+/rndc.out*
|
|
|
|
+named.lock
|
|
|
|
+named.pid
|
|
|
|
+named.port
|
|
|
|
+named.run
|
|
|
|
diff --git a/bin/tests/system/serve-stale/ans2/ans.pl.in b/bin/tests/system/serve-stale/ans2/ans.pl.in
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..2b39eca
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/ans2/ans.pl.in
|
|
|
|
@@ -0,0 +1,178 @@
|
|
|
|
+#!/usr/bin/env perl
|
|
|
|
+#
|
|
|
|
+# Copyright (C) 2014-2016 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+#
|
|
|
|
+# 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+
|
|
|
|
+use strict;
|
|
|
|
+use warnings;
|
|
|
|
+
|
|
|
|
+use IO::File;
|
|
|
|
+use IO::Socket;
|
|
|
|
+use Getopt::Long;
|
|
|
|
+use Net::DNS;
|
|
|
|
+use Time::HiRes qw(usleep nanosleep);
|
|
|
|
+
|
|
|
|
+my $pidf = new IO::File "ans.pid", "w" or die "cannot open pid file: $!";
|
|
|
|
+print $pidf "$$\n" or die "cannot write pid file: $!";
|
|
|
|
+$pidf->close or die "cannot close pid file: $!";
|
|
|
|
+sub rmpid { unlink "ans.pid"; exit 1; };
|
|
|
|
+
|
|
|
|
+$SIG{INT} = \&rmpid;
|
|
|
|
+$SIG{TERM} = \&rmpid;
|
|
|
|
+
|
|
|
|
+my $send_response = 1;
|
|
|
|
+
|
|
|
|
+my $localaddr = "10.53.0.2";
|
|
|
|
+my $localport = @PORT@;
|
|
|
|
+my $udpsock = IO::Socket::INET->new(LocalAddr => "$localaddr",
|
|
|
|
+ LocalPort => $localport, Proto => "udp", Reuse => 1) or die "$!";
|
|
|
|
+
|
|
|
|
+#
|
|
|
|
+# Delegation
|
|
|
|
+#
|
|
|
|
+my $SOA = "example 300 IN SOA . . 0 0 0 0 300";
|
|
|
|
+my $NS = "example 300 IN NS ns.example";
|
|
|
|
+my $A = "ns.example 300 IN A $localaddr";
|
|
|
|
+#
|
|
|
|
+# Records to be TTL stretched
|
|
|
|
+#
|
|
|
|
+my $TXT = "data.example 1 IN TXT \"A text record with a 1 second ttl\"";
|
|
|
|
+my $negSOA = "example 1 IN SOA . . 0 0 0 0 300";
|
|
|
|
+
|
|
|
|
+sub reply_handler {
|
|
|
|
+ my ($qname, $qclass, $qtype) = @_;
|
|
|
|
+ my ($rcode, @ans, @auth, @add);
|
|
|
|
+
|
|
|
|
+ print ("request: $qname/$qtype\n");
|
|
|
|
+ STDOUT->flush();
|
|
|
|
+
|
|
|
|
+ # Control whether we send a response or not.
|
|
|
|
+ # We always respond to control commands.
|
|
|
|
+ if ($qname eq "enable" ) {
|
|
|
|
+ if ($qtype eq "TXT") {
|
|
|
|
+ $send_response = 1;
|
|
|
|
+ my $rr = new Net::DNS::RR("$qname 0 $qclass TXT \"$send_response\"");
|
|
|
|
+ push @ans, $rr;
|
|
|
|
+ }
|
|
|
|
+ $rcode = "NOERROR";
|
|
|
|
+ return ($rcode, \@ans, \@auth, \@add, { aa => 1 });
|
|
|
|
+ } elsif ($qname eq "disable" ) {
|
|
|
|
+ if ($qtype eq "TXT") {
|
|
|
|
+ $send_response = 0;
|
|
|
|
+ my $rr = new Net::DNS::RR("$qname 0 $qclass TXT \"$send_response\"");
|
|
|
|
+ push @ans, $rr;
|
|
|
|
+ }
|
|
|
|
+ $rcode = "NOERROR";
|
|
|
|
+ return ($rcode, \@ans, \@auth, \@add, { aa => 1 });
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ # If we are not responding to queries we are done.
|
|
|
|
+ return if (!$send_response);
|
|
|
|
+
|
|
|
|
+ # Construct the response and send it.
|
|
|
|
+ if ($qname eq "ns.example" ) {
|
|
|
|
+ if ($qtype eq "A") {
|
|
|
|
+ my $rr = new Net::DNS::RR($A);
|
|
|
|
+ push @ans, $rr;
|
|
|
|
+ } else {
|
|
|
|
+ my $rr = new Net::DNS::RR($SOA);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ }
|
|
|
|
+ $rcode = "NOERROR";
|
|
|
|
+ } elsif ($qname eq "example") {
|
|
|
|
+ if ($qtype eq "NS") {
|
|
|
|
+ my $rr = new Net::DNS::RR($NS);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ $rr = new Net::DNS::RR($A);
|
|
|
|
+ push @add, $rr;
|
|
|
|
+ } elsif ($qtype eq "SOA") {
|
|
|
|
+ my $rr = new Net::DNS::RR($SOA);
|
|
|
|
+ push @ans, $rr;
|
|
|
|
+ } else {
|
|
|
|
+ my $rr = new Net::DNS::RR($SOA);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ }
|
|
|
|
+ $rcode = "NOERROR";
|
|
|
|
+ } elsif ($qname eq "nodata.example") {
|
|
|
|
+ my $rr = new Net::DNS::RR($negSOA);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ $rcode = "NOERROR";
|
|
|
|
+ } elsif ($qname eq "data.example") {
|
|
|
|
+ if ($qtype eq "TXT") {
|
|
|
|
+ my $rr = new Net::DNS::RR($TXT);
|
|
|
|
+ push @ans, $rr;
|
|
|
|
+ } else {
|
|
|
|
+ my $rr = new Net::DNS::RR($negSOA);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ }
|
|
|
|
+ $rcode = "NOERROR";
|
|
|
|
+ } elsif ($qname eq "nxdomain.example") {
|
|
|
|
+ my $rr = new Net::DNS::RR($negSOA);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ $rcode = "NXDOMAIN";
|
|
|
|
+ } else {
|
|
|
|
+ my $rr = new Net::DNS::RR($SOA);
|
|
|
|
+ push @auth, $rr;
|
|
|
|
+ $rcode = "NXDOMAIN";
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ # mark the answer as authoritive (by setting the 'aa' flag
|
|
|
|
+ return ($rcode, \@ans, \@auth, \@add, { aa => 1 });
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+GetOptions(
|
|
|
|
+ 'port=i' => \$localport,
|
|
|
|
+);
|
|
|
|
+
|
|
|
|
+my $rin;
|
|
|
|
+my $rout;
|
|
|
|
+
|
|
|
|
+for (;;) {
|
|
|
|
+ $rin = '';
|
|
|
|
+ vec($rin, fileno($udpsock), 1) = 1;
|
|
|
|
+
|
|
|
|
+ select($rout = $rin, undef, undef, undef);
|
|
|
|
+
|
|
|
|
+ if (vec($rout, fileno($udpsock), 1)) {
|
|
|
|
+ my ($buf, $request, $err);
|
|
|
|
+ $udpsock->recv($buf, 512);
|
|
|
|
+
|
|
|
|
+ if ($Net::DNS::VERSION > 0.68) {
|
|
|
|
+ $request = new Net::DNS::Packet(\$buf, 0);
|
|
|
|
+ $@ and die $@;
|
|
|
|
+ } else {
|
|
|
|
+ my $err;
|
|
|
|
+ ($request, $err) = new Net::DNS::Packet(\$buf, 0);
|
|
|
|
+ $err and die $err;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ my @questions = $request->question;
|
|
|
|
+ my $qname = $questions[0]->qname;
|
|
|
|
+ my $qclass = $questions[0]->qclass;
|
|
|
|
+ my $qtype = $questions[0]->qtype;
|
|
|
|
+ my $id = $request->header->id;
|
|
|
|
+
|
|
|
|
+ my ($rcode, $ans, $auth, $add, $headermask) = reply_handler($qname, $qclass, $qtype);
|
|
|
|
+
|
|
|
|
+ if (!defined($rcode)) {
|
|
|
|
+ print " Silently ignoring query\n";
|
|
|
|
+ next;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ my $reply = Net::DNS::Packet->new();
|
|
|
|
+ $reply->header->qr(1);
|
|
|
|
+ $reply->header->aa(1) if $headermask->{'aa'};
|
|
|
|
+ $reply->header->id($id);
|
|
|
|
+ $reply->header->rcode($rcode);
|
|
|
|
+ $reply->push("question", @questions);
|
|
|
|
+ $reply->push("answer", @$ans) if $ans;
|
|
|
|
+ $reply->push("authority", @$auth) if $auth;
|
|
|
|
+ $reply->push("additional", @$add) if $add;
|
|
|
|
+
|
|
|
|
+ my $num_chars = $udpsock->send($reply->data);
|
|
|
|
+ print " Sent $num_chars bytes via UDP\n";
|
|
|
|
+ }
|
|
|
|
+}
|
|
|
|
diff --git a/bin/tests/system/serve-stale/clean.sh b/bin/tests/system/serve-stale/clean.sh
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..2397326
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/clean.sh
|
|
|
|
@@ -0,0 +1,15 @@
|
|
|
|
+# Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+#
|
|
|
|
+# 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+
|
|
|
|
+rm -f test.output
|
|
|
|
+rm -f dig.out.test*
|
|
|
|
+rm -f ans2/ans.pl
|
|
|
|
+rm -f ns3/root.bk
|
|
|
|
+rm -f rndc.out.test*
|
|
|
|
+rm -f ns*/named.memstats
|
|
|
|
+rm -f ns*/managed-keys.bind
|
|
|
|
+rm -f ns*/named.conf
|
|
|
|
+rm -f ns*/named.run
|
|
|
|
diff --git a/bin/tests/system/serve-stale/ns1/named1.conf.in b/bin/tests/system/serve-stale/ns1/named1.conf.in
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..8a75a10
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/ns1/named1.conf.in
|
|
|
|
@@ -0,0 +1,35 @@
|
|
|
|
+/*
|
|
|
|
+ * Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+ *
|
|
|
|
+ * 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+ */
|
|
|
|
+
|
|
|
|
+key rndc_key {
|
|
|
|
+ secret "1234abcd8765";
|
|
|
|
+ algorithm hmac-sha256;
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+controls {
|
|
|
|
+ inet 10.53.0.1 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+options {
|
|
|
|
+ query-source address 10.53.0.1;
|
|
|
|
+ notify-source 10.53.0.1;
|
|
|
|
+ transfer-source 10.53.0.1;
|
|
|
|
+ port @PORT@;
|
|
|
|
+ pid-file "named.pid";
|
|
|
|
+ listen-on { 10.53.0.1; };
|
|
|
|
+ listen-on-v6 { none; };
|
|
|
|
+ recursion yes;
|
|
|
|
+ max-stale-ttl 3600;
|
|
|
|
+ stale-answer-ttl 1;
|
|
|
|
+ stale-answer-enable yes;
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+zone "." {
|
|
|
|
+ type master;
|
|
|
|
+ file "root.db";
|
|
|
|
+};
|
|
|
|
diff --git a/bin/tests/system/serve-stale/ns1/named2.conf.in b/bin/tests/system/serve-stale/ns1/named2.conf.in
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..072e6ec
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/ns1/named2.conf.in
|
|
|
|
@@ -0,0 +1,35 @@
|
|
|
|
+/*
|
|
|
|
+ * Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+ *
|
|
|
|
+ * 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+ */
|
|
|
|
+
|
|
|
|
+key rndc_key {
|
|
|
|
+ secret "1234abcd8765";
|
|
|
|
+ algorithm hmac-sha256;
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+controls {
|
|
|
|
+ inet 10.53.0.1 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+options {
|
|
|
|
+ query-source address 10.53.0.1;
|
|
|
|
+ notify-source 10.53.0.1;
|
|
|
|
+ transfer-source 10.53.0.1;
|
|
|
|
+ port @PORT@;
|
|
|
|
+ pid-file "named.pid";
|
|
|
|
+ listen-on { 10.53.0.1; };
|
|
|
|
+ listen-on-v6 { none; };
|
|
|
|
+ recursion yes;
|
|
|
|
+ max-stale-ttl 7200;
|
|
|
|
+ stale-answer-ttl 2;
|
|
|
|
+ stale-answer-enable yes;
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+zone "." {
|
|
|
|
+ type master;
|
|
|
|
+ file "root.db";
|
|
|
|
+};
|
|
|
|
diff --git a/bin/tests/system/serve-stale/ns1/root.db b/bin/tests/system/serve-stale/ns1/root.db
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..eb9ad3e
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/ns1/root.db
|
|
|
|
@@ -0,0 +1,5 @@
|
|
|
|
+. 300 SOA . . 0 0 0 0 0
|
|
|
|
+. 300 NS ns.nil.
|
|
|
|
+ns.nil. 300 A 10.53.0.1
|
|
|
|
+example. 300 NS ns.example.
|
|
|
|
+ns.example. 300 A 10.53.0.2
|
|
|
|
diff --git a/bin/tests/system/serve-stale/ns3/named.conf.in b/bin/tests/system/serve-stale/ns3/named.conf.in
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..24a3293
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/ns3/named.conf.in
|
|
|
|
@@ -0,0 +1,35 @@
|
|
|
|
+/*
|
|
|
|
+ * Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+ *
|
|
|
|
+ * 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+ */
|
|
|
|
+
|
|
|
|
+key rndc_key {
|
|
|
|
+ secret "1234abcd8765";
|
|
|
|
+ algorithm hmac-sha256;
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+controls {
|
|
|
|
+ inet 10.53.0.3 port @CONTROLPORT@ allow { any; } keys { rndc_key; };
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+options {
|
|
|
|
+ query-source address 10.53.0.3;
|
|
|
|
+ notify-source 10.53.0.3;
|
|
|
|
+ transfer-source 10.53.0.3;
|
|
|
|
+ port @PORT@;
|
|
|
|
+ pid-file "named.pid";
|
|
|
|
+ listen-on { 10.53.0.3; };
|
|
|
|
+ listen-on-v6 { none; };
|
|
|
|
+ recursion yes;
|
|
|
|
+ // max-stale-ttl 3600;
|
|
|
|
+ // stale-answer-ttl 3;
|
|
|
|
+};
|
|
|
|
+
|
|
|
|
+zone "." {
|
|
|
|
+ type slave;
|
|
|
|
+ masters { 10.53.0.1; };
|
|
|
|
+ file "root.bk";
|
|
|
|
+};
|
|
|
|
diff --git a/bin/tests/system/serve-stale/prereq.sh b/bin/tests/system/serve-stale/prereq.sh
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..a3bbef8
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/prereq.sh
|
|
|
|
@@ -0,0 +1,38 @@
|
|
|
|
+#!/bin/sh
|
|
|
|
+#
|
|
|
|
+# Copyright (C) 2011, 2012, 2014, 2016 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+#
|
|
|
|
+# 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+
|
|
|
|
+SYSTEMTESTTOP=..
|
|
|
|
+. $SYSTEMTESTTOP/conf.sh
|
|
|
|
+
|
|
|
|
+if $PERL -e 'use Net::DNS;' 2>/dev/null
|
|
|
|
+then
|
|
|
|
+ if $PERL -e 'use Net::DNS; die if ($Net::DNS::VERSION >= 0.69 && $Net::DNS::VERSION <= 0.74);' 2>/dev/null
|
|
|
|
+ then
|
|
|
|
+ :
|
|
|
|
+ else
|
|
|
|
+ echo "I:Net::DNS versions 0.69 to 0.74 have bugs that cause this test to fail: please update." >&2
|
|
|
|
+ exit 1
|
|
|
|
+ fi
|
|
|
|
+else
|
|
|
|
+ echo "I:This test requires the Net::DNS library." >&2
|
|
|
|
+ exit 1
|
|
|
|
+fi
|
|
|
|
+if $PERL -e 'use Net::DNS::Nameserver;' 2>/dev/null
|
|
|
|
+then
|
|
|
|
+ :
|
|
|
|
+else
|
|
|
|
+ echo "I:This test requires the Net::DNS::Nameserver library." >&2
|
|
|
|
+ exit 1
|
|
|
|
+fi
|
|
|
|
+if $PERL -e 'use Time::HiRes;' 2>/dev/null
|
|
|
|
+then
|
|
|
|
+ :
|
|
|
|
+else
|
|
|
|
+ echo "I:This test requires the Time::HiRes library." >&2
|
|
|
|
+ exit 1
|
|
|
|
+fi
|
|
|
|
diff --git a/bin/tests/system/serve-stale/setup.sh b/bin/tests/system/serve-stale/setup.sh
|
|
|
|
new file mode 100644
|
|
|
|
index 0000000..690f43c
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/setup.sh
|
|
|
|
@@ -0,0 +1,13 @@
|
|
|
|
+#!/bin/sh
|
|
|
|
+# Copyright (C) 2017 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+#
|
|
|
|
+# 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+
|
|
|
|
+SYSTEMTESTTOP=..
|
|
|
|
+. $SYSTEMTESTTOP/conf.sh
|
|
|
|
+
|
|
|
|
+copy_setports ns1/named1.conf.in ns1/named.conf
|
|
|
|
+copy_setports ans2/ans.pl.in ans2/ans.pl
|
|
|
|
+copy_setports ns3/named.conf.in ns3/named.conf
|
|
|
|
diff --git a/bin/tests/system/serve-stale/tests.sh b/bin/tests/system/serve-stale/tests.sh
|
|
|
|
new file mode 100755
|
|
|
|
index 0000000..201c996
|
|
|
|
--- /dev/null
|
|
|
|
+++ b/bin/tests/system/serve-stale/tests.sh
|
|
|
|
@@ -0,0 +1,536 @@
|
|
|
|
+#!/bin/sh
|
|
|
|
+#
|
|
|
|
+# Copyright (C) 2000, 2001, 2004, 2007, 2009-2016 Internet Systems Consortium, Inc. ("ISC")
|
|
|
|
+#
|
|
|
|
+# 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 http://mozilla.org/MPL/2.0/.
|
|
|
|
+
|
|
|
|
+SYSTEMTESTTOP=..
|
|
|
|
+. $SYSTEMTESTTOP/conf.sh
|
|
|
|
+
|
|
|
|
+while getopts "p:c:" flag; do
|
|
|
|
+ case "$flag" in
|
|
|
|
+ p) port=$OPTARG ;;
|
|
|
|
+ c) controlport=$OPTARG ;;
|
|
|
|
+ *) exit 1 ;;
|
|
|
|
+ esac
|
|
|
|
+done
|
|
|
|
+
|
|
|
|
+RNDCCMD="$RNDC -c $SYSTEMTESTTOP/common/rndc.conf -p ${CONTROLPORT} -s"
|
|
|
|
+
|
|
|
|
+echo "RNDCCMD: ${RNDCCMD}"
|
|
|
|
+
|
|
|
|
+status=0
|
|
|
|
+n=0
|
|
|
|
+
|
|
|
|
+#echo "I:check ans.pl server ($n)"
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 example NS
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 example SOA
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 ns.example A
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 ns.example AAAA
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 txt enable
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 txt disable
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 ns.example AAAA
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 txt enable
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 ns.example AAAA
|
|
|
|
+##$DIG -p ${PORT} @10.53.0.2 data.example TXT
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 nodata.example TXT
|
|
|
|
+#$DIG -p ${PORT} @10.53.0.2 nxdomain.example TXT
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:prime cache data.example ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:prime cache nodata.example ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:prime cache nxdomain.example ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:disable responses from authoritative server ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+sleep 1
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: on (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale data.example ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nodata.example ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nxdomain.example ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale off' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale off || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: off (rndc) (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale data.example (serve-stale off) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nodata.example (serve-stale off) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nxdomain.example (serve-stale off) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale on' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale on || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: on (rndc) (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale data.example (serve-stale on) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nodata.example (serve-stale on) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nxdomain.example (serve-stale on) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale no' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale no || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: off (rndc) (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale data.example (serve-stale no) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nodata.example (serve-stale no) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nxdomain.example (serve-stale no) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale yes' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale yes || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: on (rndc) (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale data.example (serve-stale yes) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nodata.example (serve-stale yes) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nxdomain.example (serve-stale yes) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale off' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale off || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale reset' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale reset || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: on (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale data.example (serve-stale reset) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nodata.example (serve-stale reset) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check stale nxdomain.example (serve-stale reset) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc serve-stale off' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale off || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: off (rndc) (stale-answer-ttl=1 max-stale-ttl=3600)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:updating ns1/named.conf ($n)"
|
|
|
|
+ret=0
|
|
|
|
+sed -e "s/@PORT@/${PORT}/g;s/@CONTROLPORT@/${CONTROLPORT}/g" < ns1/named2.conf.in > ns1/named.conf
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:running 'rndc reload' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 reload > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep "server reload successful" rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: off (rndc) (stale-answer-ttl=2 max-stale-ttl=7200)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale > rndc.out.test$n 2>&1 && ret=1
|
|
|
|
+grep "unexpected end of input" rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale unknown' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale unknown > rndc.out.test$n 2>&1 && ret=1
|
|
|
|
+grep "syntax error" rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo_i "flush cache, re-enable serve-stale and query again ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.1 flushtree example > rndc.out.test$n.1 2>&1 || ret=1
|
|
|
|
+$RNDCCMD 10.53.0.1 serve-stale on > rndc.out.test$n.2 2>&1 || ret=1
|
|
|
|
+$DIG -p ${PORT} @10.53.0.1 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo_i "failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.2 txt enable > dig.out.test$n
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "TXT.\"1\"" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:prime cache data.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:prime cache nodata.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:prime cache nxdomain.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:disable responses from authoritative server ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.2 txt disable > dig.out.test$n
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "TXT.\"0\"" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+sleep 1
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.3 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: off (stale-answer-ttl=1 max-stale-ttl=604800)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check fail of data.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check fail of nodata.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check fail of nxdomain.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: SERVFAIL" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale on' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.3 serve-stale on > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check 'rndc serve-stale status' ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$RNDCCMD 10.53.0.3 serve-stale status > rndc.out.test$n 2>&1 || ret=1
|
|
|
|
+grep '_default: on (rndc) (stale-answer-ttl=1 max-stale-ttl=604800)' rndc.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check data.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 data.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 1," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check nodata.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 nodata.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NOERROR" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+n=`expr $n + 1`
|
|
|
|
+echo "I:check nxdomain.example (max-stale-ttl default) ($n)"
|
|
|
|
+ret=0
|
|
|
|
+$DIG -p ${PORT} @10.53.0.3 nxdomain.example TXT > dig.out.test$n
|
|
|
|
+grep "status: NXDOMAIN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "ANSWER: 0," dig.out.test$n > /dev/null || ret=1
|
|
|
|
+grep "example.*1.*IN" dig.out.test$n > /dev/null || ret=1
|
|
|
|
+if [ $ret != 0 ]; then echo "I:failed"; fi
|
|
|
|
+status=`expr $status + $ret`
|
|
|
|
+
|
|
|
|
+echo "I:exit status: $status"
|
|
|
|
+[ $status -eq 0 ] || exit 1
|
|
|
|
diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
|
2020-07-28 07:51:19 +00:00
|
|
|
index bb1e81d..6dbbfad 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/doc/arm/Bv9ARM-book.xml
|
|
|
|
+++ b/doc/arm/Bv9ARM-book.xml
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -4381,6 +4381,9 @@ badresp:1,adberr:0,findfail:0,valfail:0]
|
2020-01-21 22:30:08 +00:00
|
|
|
statement in the <filename>named.conf</filename> file:
|
|
|
|
</para>
|
|
|
|
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="options.grammar.xml"/>
|
|
|
|
+ [ <command>max-stale-ttl</command> <replaceable>number</replaceable> ; ]
|
|
|
|
+ [ <command>stale-answer-enable</command> <replaceable>yes_or_no</replaceable> ; ]
|
|
|
|
+ [ <command>stale-answer-ttl</command> <replaceable>number</replaceable> ; ]
|
|
|
|
</section>
|
|
|
|
|
|
|
|
<section xml:id="options"><info><title><command>options</command> Statement Definition and
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -4474,6 +4477,7 @@ badresp:1,adberr:0,findfail:0,valfail:0]
|
2020-01-21 22:30:08 +00:00
|
|
|
<command>dnssec-validation</command>,
|
|
|
|
<command>max-cache-ttl</command>,
|
|
|
|
<command>max-ncache-ttl</command>,
|
|
|
|
+ <command>max-stale-ttl</command>,
|
|
|
|
<command>max-cache-size</command>, and
|
|
|
|
<command>zero-no-soa-ttl</command>.
|
|
|
|
</para>
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -5485,7 +5489,6 @@ options {
|
2020-01-21 22:30:08 +00:00
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
-
|
|
|
|
<varlistentry>
|
|
|
|
<term><command>max-zone-ttl</command></term>
|
|
|
|
<listitem>
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -5521,6 +5524,21 @@ options {
|
2020-01-21 22:30:08 +00:00
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
+ <varlistentry>
|
|
|
|
+ <term><command>stale-answer-ttl</command></term>
|
|
|
|
+ <listitem>
|
|
|
|
+ <para>
|
|
|
|
+ Specifies the TTL to be returned on stale answers.
|
|
|
|
+ The default is 1 second. The minimal allowed is
|
|
|
|
+ also 1 second; a value of 0 will be updated silently
|
|
|
|
+ to 1 second. For stale answers to be returned
|
|
|
|
+ <option>max-stale-ttl</option> must be set to a
|
|
|
|
+ non zero value and they must not have been disabled
|
|
|
|
+ by <command>rndc</command>.
|
|
|
|
+ </para>
|
|
|
|
+ </listitem>
|
|
|
|
+ </varlistentry>
|
|
|
|
+
|
|
|
|
<varlistentry>
|
|
|
|
<term><command>serial-update-method</command></term>
|
|
|
|
<listitem>
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6280,6 +6298,22 @@ options {
|
2020-01-21 22:30:08 +00:00
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
+ <varlistentry>
|
|
|
|
+ <term><command>serve-stale-enable</command></term>
|
|
|
|
+ <listitem>
|
|
|
|
+ <para>
|
|
|
|
+ Enable the returning of stale answers when the
|
|
|
|
+ nameservers for the zone are not answering. This
|
|
|
|
+ is off by default but can be enabled/disabled via
|
|
|
|
+ <command>rndc server-stale on</command> and
|
|
|
|
+ <command>rndc server-stale off</command> which
|
|
|
|
+ override the named.conf setting. <command>rndc
|
|
|
|
+ server-stale reset</command> will restore control
|
|
|
|
+ via named.conf.
|
|
|
|
+ </para>
|
|
|
|
+ </listitem>
|
|
|
|
+ </varlistentry>
|
|
|
|
+
|
|
|
|
<varlistentry>
|
|
|
|
<term><command>nocookie-udp-size</command></term>
|
|
|
|
<listitem>
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -7501,14 +7535,20 @@ options {
|
2020-01-21 22:30:08 +00:00
|
|
|
<term><command>resolver-query-timeout</command></term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
- The amount of time in seconds that the resolver
|
|
|
|
+ The amount of time in milliseconds that the resolver
|
|
|
|
will spend attempting to resolve a recursive
|
|
|
|
query before failing. The default and minimum
|
|
|
|
- is <literal>10</literal> and the maximum is
|
|
|
|
- <literal>30</literal>. Setting it to
|
|
|
|
+ is <literal>10000</literal> and the maximum is
|
|
|
|
+ <literal>30000</literal>. Setting it to
|
|
|
|
<literal>0</literal> will result in the default
|
|
|
|
being used.
|
|
|
|
</para>
|
|
|
|
+ <para>
|
|
|
|
+ This value was originally specified in seconds.
|
|
|
|
+ Values less than or equal to 300 will be be treated
|
|
|
|
+ as seconds and converted to milliseconds before
|
|
|
|
+ applying the above limits.
|
|
|
|
+ </para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -8994,6 +9034,27 @@ avoid-v6-udp-ports { 40000; range 50000 60000; };
|
2020-01-21 22:30:08 +00:00
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
+ <varlistentry>
|
|
|
|
+ <term><command>max-stale-ttl</command></term>
|
|
|
|
+ <listitem>
|
|
|
|
+ <para>
|
|
|
|
+ Sets the maximum time for which the server will
|
|
|
|
+ retain records past their normal expiry to
|
|
|
|
+ return them as stale records when the servers
|
|
|
|
+ for those records are not reachable. The default
|
|
|
|
+ is to not retain the record.
|
|
|
|
+ </para>
|
|
|
|
+ <para>
|
|
|
|
+ <command>rndc serve-stale</command> can be used
|
|
|
|
+ to disable and re-enable the serving of stale
|
|
|
|
+ records at runtime. Reloading or reconfiguring
|
|
|
|
+ <command>named</command> will not re-enable serving
|
|
|
|
+ of stale records if they have been disabled via
|
|
|
|
+ <command>rndc</command>.
|
|
|
|
+ </para>
|
|
|
|
+ </listitem>
|
|
|
|
+ </varlistentry>
|
|
|
|
+
|
|
|
|
<varlistentry>
|
|
|
|
<term><command>min-roots</command></term>
|
|
|
|
<listitem>
|
|
|
|
diff --git a/doc/arm/logging-categories.xml b/doc/arm/logging-categories.xml
|
|
|
|
index 181def7..59f6afb 100644
|
|
|
|
--- a/doc/arm/logging-categories.xml
|
|
|
|
+++ b/doc/arm/logging-categories.xml
|
|
|
|
@@ -311,6 +311,17 @@
|
|
|
|
</para>
|
|
|
|
</entry>
|
|
|
|
</row>
|
|
|
|
+ <row rowsep="0">
|
|
|
|
+ <entry colname="1">
|
|
|
|
+ <para><command>serve-stale</command></para>
|
|
|
|
+ </entry>
|
|
|
|
+ <entry colname="2">
|
|
|
|
+ <para>
|
|
|
|
+ Whether or not a stale answer is used
|
|
|
|
+ following a resolver failure.
|
|
|
|
+ </para>
|
|
|
|
+ </entry>
|
|
|
|
+ </row>
|
|
|
|
<row rowsep="0">
|
|
|
|
<entry colname="1">
|
|
|
|
<para><command>spill</command></para>
|
|
|
|
diff --git a/doc/arm/notes-rh-changes.xml b/doc/arm/notes-rh-changes.xml
|
2020-07-28 07:51:19 +00:00
|
|
|
index 89a4961..80b7dee 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/doc/arm/notes-rh-changes.xml
|
|
|
|
+++ b/doc/arm/notes-rh-changes.xml
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -12,6 +12,9 @@
|
2020-01-21 22:30:08 +00:00
|
|
|
<section xml:id="relnotes_rh_changes"><info><title>Red Hat Specific Changes</title></info>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem>
|
|
|
|
+ <para>
|
|
|
|
+ This version includes some features not present in releases by ISC.
|
|
|
|
+ </para>
|
|
|
|
<para>
|
|
|
|
By default, BIND now uses the random number generation functions
|
|
|
|
in the cryptographic library (i.e., OpenSSL or a PKCS#11
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -36,7 +39,16 @@
|
2020-01-21 22:30:08 +00:00
|
|
|
case <filename>/dev/random</filename> will be the default
|
|
|
|
entropy source. [RT #31459] [RT #46047]
|
|
|
|
</para>
|
|
|
|
- </listitem>
|
|
|
|
+ <para>
|
|
|
|
+ When acting as a recursive resolver, <command>named</command>
|
|
|
|
+ can now continue returning answers whose TTLs have expired
|
|
|
|
+ when the authoritative server is under attack and unable to
|
|
|
|
+ respond. This is controlled by the
|
|
|
|
+ <command>stale-answer-enable</command>,
|
|
|
|
+ <command>stale-answer-ttl</command> and
|
|
|
|
+ <command>max-stale-ttl</command> options. [RT #44790]
|
|
|
|
+ </para>
|
|
|
|
+ </listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</section>
|
|
|
|
|
|
|
|
diff --git a/doc/misc/options b/doc/misc/options
|
|
|
|
index e11beed..fde93c7 100644
|
|
|
|
--- a/doc/misc/options
|
|
|
|
+++ b/doc/misc/options
|
|
|
|
@@ -225,6 +225,7 @@ options {
|
|
|
|
max-refresh-time <integer>;
|
|
|
|
max-retry-time <integer>;
|
|
|
|
max-rsa-exponent-size <integer>;
|
|
|
|
+ max-stale-ttl <ttlval>;
|
|
|
|
max-transfer-idle-in <integer>;
|
|
|
|
max-transfer-idle-out <integer>;
|
|
|
|
max-transfer-time-in <integer>;
|
|
|
|
@@ -298,7 +299,9 @@ options {
|
|
|
|
request-sit <boolean>; // obsolete
|
|
|
|
require-server-cookie <boolean>;
|
|
|
|
reserved-sockets <integer>;
|
|
|
|
+ resolver-nonbackoff-tries <integer>;
|
|
|
|
resolver-query-timeout <integer>;
|
|
|
|
+ resolver-retry-interval <integer>;
|
|
|
|
response-policy { zone <string> [ log <boolean> ] [ max-policy-ttl
|
|
|
|
<integer> ] [ policy ( cname | disabled | drop | given | no-op
|
|
|
|
| nodata | nxdomain | passthru | tcp-only <quoted_string> ) ] [
|
|
|
|
@@ -328,6 +331,8 @@ options {
|
|
|
|
sit-secret <string>; // obsolete
|
|
|
|
sortlist { <address_match_element>; ... };
|
|
|
|
stacksize ( default | unlimited | <sizeval> );
|
|
|
|
+ stale-answer-enable <boolean>;
|
|
|
|
+ stale-answer-ttl <ttlval>;
|
|
|
|
startup-notify-rate <integer>;
|
|
|
|
statistics-file <quoted_string>;
|
|
|
|
statistics-interval <integer>; // not yet implemented
|
|
|
|
@@ -539,6 +544,7 @@ view <string> [ <class> ] {
|
|
|
|
max-recursion-queries <integer>;
|
|
|
|
max-refresh-time <integer>;
|
|
|
|
max-retry-time <integer>;
|
|
|
|
+ max-stale-ttl <ttlval>;
|
|
|
|
max-transfer-idle-in <integer>;
|
|
|
|
max-transfer-idle-out <integer>;
|
|
|
|
max-transfer-time-in <integer>;
|
|
|
|
@@ -600,7 +606,9 @@ view <string> [ <class> ] {
|
|
|
|
request-nsid <boolean>;
|
|
|
|
request-sit <boolean>; // obsolete
|
|
|
|
require-server-cookie <boolean>;
|
|
|
|
+ resolver-nonbackoff-tries <integer>;
|
|
|
|
resolver-query-timeout <integer>;
|
|
|
|
+ resolver-retry-interval <integer>;
|
|
|
|
response-policy { zone <string> [ log <boolean> ] [ max-policy-ttl
|
|
|
|
<integer> ] [ policy ( cname | disabled | drop | given | no-op
|
|
|
|
| nodata | nxdomain | passthru | tcp-only <quoted_string> ) ] [
|
|
|
|
@@ -655,6 +663,8 @@ view <string> [ <class> ] {
|
|
|
|
sig-signing-type <integer>;
|
|
|
|
sig-validity-interval <integer> [ <integer> ];
|
|
|
|
sortlist { <address_match_element>; ... };
|
|
|
|
+ stale-answer-enable <boolean>;
|
|
|
|
+ stale-answer-ttl <ttlval>;
|
|
|
|
suppress-initial-notify <boolean>; // not yet implemented
|
|
|
|
topology { <address_match_element>; ... }; // not implemented
|
|
|
|
transfer-format ( many-answers | one-answer );
|
|
|
|
diff --git a/lib/bind9/check.c b/lib/bind9/check.c
|
2020-07-28 07:51:19 +00:00
|
|
|
index eaac5ba..a89d78f 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/lib/bind9/check.c
|
|
|
|
+++ b/lib/bind9/check.c
|
|
|
|
@@ -99,7 +99,8 @@ check_orderent(const cfg_obj_t *ent, isc_log_t *logctx) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"rrset-order: invalid class '%s'",
|
|
|
|
r.base);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@@ -112,7 +113,8 @@ check_orderent(const cfg_obj_t *ent, isc_log_t *logctx) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"rrset-order: invalid type '%s'",
|
|
|
|
r.base);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@@ -126,7 +128,8 @@ check_orderent(const cfg_obj_t *ent, isc_log_t *logctx) {
|
|
|
|
if (tresult != ISC_R_SUCCESS) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"rrset-order: invalid name '%s'", str);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@@ -135,14 +138,16 @@ check_orderent(const cfg_obj_t *ent, isc_log_t *logctx) {
|
|
|
|
strcasecmp("order", cfg_obj_asstring(obj)) != 0) {
|
|
|
|
cfg_obj_log(ent, logctx, ISC_LOG_ERROR,
|
|
|
|
"rrset-order: keyword 'order' missing");
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
|
|
|
|
obj = cfg_tuple_get(ent, "ordering");
|
|
|
|
if (!cfg_obj_isstring(obj)) {
|
|
|
|
cfg_obj_log(ent, logctx, ISC_LOG_ERROR,
|
|
|
|
"rrset-order: missing ordering");
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
} else if (strcasecmp(cfg_obj_asstring(obj), "fixed") == 0) {
|
|
|
|
#if !DNS_RDATASET_FIXED
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_WARNING,
|
|
|
|
@@ -154,7 +159,8 @@ check_orderent(const cfg_obj_t *ent, isc_log_t *logctx) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"rrset-order: invalid order '%s'",
|
|
|
|
cfg_obj_asstring(obj));
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
return (result);
|
|
|
|
}
|
|
|
|
@@ -174,7 +180,7 @@ check_order(const cfg_obj_t *options, isc_log_t *logctx) {
|
|
|
|
element = cfg_list_next(element))
|
|
|
|
{
|
|
|
|
tresult = check_orderent(cfg_listelt_value(element), logctx);
|
|
|
|
- if (tresult != ISC_R_SUCCESS)
|
|
|
|
+ if (result == ISC_R_SUCCESS && tresult != ISC_R_SUCCESS)
|
|
|
|
result = tresult;
|
|
|
|
}
|
|
|
|
return (result);
|
|
|
|
@@ -204,7 +210,8 @@ check_dual_stack(const cfg_obj_t *options, isc_log_t *logctx) {
|
|
|
|
if (val > UINT16_MAX) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"port '%u' out of range", val);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_RANGE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
obj = cfg_tuple_get(alternates, "addresses");
|
|
|
|
@@ -224,7 +231,8 @@ check_dual_stack(const cfg_obj_t *options, isc_log_t *logctx) {
|
|
|
|
if (tresult != ISC_R_SUCCESS) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"bad name '%s'", str);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = tresult;
|
|
|
|
}
|
|
|
|
obj = cfg_tuple_get(value, "port");
|
|
|
|
if (cfg_obj_isuint32(obj)) {
|
|
|
|
@@ -232,7 +240,8 @@ check_dual_stack(const cfg_obj_t *options, isc_log_t *logctx) {
|
|
|
|
if (val > UINT16_MAX) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"port '%u' out of range", val);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_RANGE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1271,7 +1280,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"auto-dnssec may only be activated at the "
|
|
|
|
"zone level");
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1291,7 +1301,7 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
{
|
|
|
|
obj = cfg_listelt_value(element);
|
|
|
|
tresult = mustbesecure(obj, symtab, logctx, mctx);
|
|
|
|
- if (tresult != ISC_R_SUCCESS)
|
|
|
|
+ if (result == ISC_R_SUCCESS && tresult != ISC_R_SUCCESS)
|
|
|
|
result = tresult;
|
|
|
|
}
|
|
|
|
if (symtab != NULL)
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1310,7 +1320,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"%s: invalid name '%s'",
|
|
|
|
server_contact[i], str);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1330,7 +1341,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"disable-empty-zone: invalid name '%s'",
|
|
|
|
str);
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1344,11 +1356,12 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
strlen(cfg_obj_asstring(obj)) > 1024U) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"'server-id' too big (>1024 bytes)");
|
|
|
|
- result = ISC_R_FAILURE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_FAILURE;
|
|
|
|
}
|
|
|
|
|
|
|
|
tresult = check_dscp(options, logctx);
|
|
|
|
- if (tresult != ISC_R_SUCCESS)
|
|
|
|
+ if (result == ISC_R_SUCCESS && tresult != ISC_R_SUCCESS)
|
|
|
|
result = tresult;
|
|
|
|
|
|
|
|
obj = NULL;
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1358,11 +1371,13 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
if (lifetime > 604800) { /* 7 days */
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"'nta-lifetime' cannot exceed one week");
|
|
|
|
- result = ISC_R_RANGE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_RANGE;
|
|
|
|
} else if (lifetime == 0) {
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"'nta-lifetime' may not be zero");
|
|
|
|
- result = ISC_R_RANGE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_RANGE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1373,7 +1388,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
|
2020-01-21 22:30:08 +00:00
|
|
|
if (recheck > 604800) { /* 7 days */
|
|
|
|
cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
|
|
|
|
"'nta-recheck' cannot exceed one week");
|
|
|
|
- result = ISC_R_RANGE;
|
|
|
|
+ if (result == ISC_R_SUCCESS)
|
|
|
|
+ result = ISC_R_RANGE;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (recheck > lifetime)
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -1391,7 +1407,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
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2020-01-21 22:30:08 +00:00
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if (strcasecmp(ccalg, "aes") == 0) {
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cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
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"cookie-algorithm: '%s' not supported", ccalg);
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- result = ISC_R_NOTIMPLEMENTED;
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+ if (result == ISC_R_SUCCESS)
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+ result = ISC_R_NOTIMPLEMENTED;
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}
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#endif
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2020-07-28 07:51:19 +00:00
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@@ -1480,7 +1497,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
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2020-01-21 22:30:08 +00:00
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cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
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"%s out of range (%u < %u)",
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fstrm[i].name, value, fstrm[i].min);
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- result = ISC_R_RANGE;
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+ if (result == ISC_R_SUCCESS)
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+ result = ISC_R_RANGE;
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}
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if (strcmp(fstrm[i].name, "fstrm-set-input-queue-size") == 0) {
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2020-07-28 07:51:19 +00:00
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@@ -1494,7 +1512,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
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2020-01-21 22:30:08 +00:00
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"%s '%u' not a power-of-2",
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fstrm[i].name,
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cfg_obj_asuint32(obj));
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- result = ISC_R_RANGE;
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+ if (result == ISC_R_SUCCESS)
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+ result = ISC_R_RANGE;
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}
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}
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}
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2020-07-28 07:51:19 +00:00
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@@ -1512,7 +1531,8 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
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2020-01-21 22:30:08 +00:00
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"%" PRId64 "' "
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"is too small",
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mapsize);
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- return (ISC_R_RANGE);
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+ if (result == ISC_R_SUCCESS)
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+ result = ISC_R_RANGE;
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} else if (mapsize > (1ULL << 40)) { /* 1 terabyte */
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cfg_obj_log(obj, logctx,
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ISC_LOG_ERROR,
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2020-07-28 07:51:19 +00:00
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@@ -1520,10 +1540,20 @@ check_options(const cfg_obj_t *options, isc_log_t *logctx, isc_mem_t *mctx,
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2020-01-21 22:30:08 +00:00
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"%" PRId64 "' "
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"is too large",
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mapsize);
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- return (ISC_R_RANGE);
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+ if (result == ISC_R_SUCCESS)
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+ result = ISC_R_RANGE;
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}
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}
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+ obj = NULL;
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+ (void)cfg_map_get(options, "resolver-nonbackoff-tries", &obj);
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+ if (obj != NULL && cfg_obj_asuint32(obj) == 0U) {
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+ cfg_obj_log(obj, logctx, ISC_LOG_ERROR,
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+ "'resolver-nonbackoff-tries' must be >= 1");
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+ if (result == ISC_R_SUCCESS)
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+ result = ISC_R_RANGE;
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+ }
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+
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return (result);
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}
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diff --git a/lib/dns/cache.c b/lib/dns/cache.c
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index 4701ff8..97e427a 100644
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--- a/lib/dns/cache.c
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+++ b/lib/dns/cache.c
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@@ -138,6 +138,7 @@ struct dns_cache {
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int db_argc;
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char **db_argv;
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size_t size;
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+ dns_ttl_t serve_stale_ttl;
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isc_stats_t *stats;
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/* Locked by 'filelock'. */
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@@ -167,9 +168,13 @@ overmem_cleaning_action(isc_task_t *task, isc_event_t *event);
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static inline isc_result_t
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cache_create_db(dns_cache_t *cache, dns_db_t **db) {
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- return (dns_db_create(cache->mctx, cache->db_type, dns_rootname,
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- dns_dbtype_cache, cache->rdclass,
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- cache->db_argc, cache->db_argv, db));
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+ isc_result_t result;
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+ result = dns_db_create(cache->mctx, cache->db_type, dns_rootname,
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+ dns_dbtype_cache, cache->rdclass,
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+ cache->db_argc, cache->db_argv, db);
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+ if (result == ISC_R_SUCCESS)
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+ dns_db_setservestalettl(*db, cache->serve_stale_ttl);
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+ return (result);
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}
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isc_result_t
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@@ -238,6 +243,7 @@ dns_cache_create3(isc_mem_t *cmctx, isc_mem_t *hmctx, isc_taskmgr_t *taskmgr,
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cache->references = 1;
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cache->live_tasks = 0;
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cache->rdclass = rdclass;
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+ cache->serve_stale_ttl = 0;
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cache->stats = NULL;
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result = isc_stats_create(cmctx, &cache->stats,
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@@ -1092,6 +1098,32 @@ dns_cache_getcachesize(dns_cache_t *cache) {
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return (size);
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}
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+void
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+dns_cache_setservestalettl(dns_cache_t *cache, dns_ttl_t ttl) {
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+ REQUIRE(VALID_CACHE(cache));
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+
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+ LOCK(&cache->lock);
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+ cache->serve_stale_ttl = ttl;
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+ UNLOCK(&cache->lock);
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+
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+ (void)dns_db_setservestalettl(cache->db, ttl);
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+}
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+
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+dns_ttl_t
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+dns_cache_getservestalettl(dns_cache_t *cache) {
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+ dns_ttl_t ttl;
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+ isc_result_t result;
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+
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+ REQUIRE(VALID_CACHE(cache));
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+
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+ /*
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+ * Could get it straight from the dns_cache_t, but use db
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+ * to confirm the value that the db is really using.
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+ */
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+ result = dns_db_getservestalettl(cache->db, &ttl);
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+ return result == ISC_R_SUCCESS ? ttl : 0;
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+}
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+
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/*
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* The cleaner task is shutting down; do the necessary cleanup.
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*/
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diff --git a/lib/dns/db.c b/lib/dns/db.c
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index ee3e00d..576aa65 100644
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--- a/lib/dns/db.c
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+++ b/lib/dns/db.c
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@@ -1130,3 +1130,25 @@ dns_db_nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name) {
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return (ISC_R_NOTIMPLEMENTED);
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return ((db->methods->nodefullname)(db, node, name));
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}
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+
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+isc_result_t
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+dns_db_setservestalettl(dns_db_t *db, dns_ttl_t ttl)
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+{
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+ REQUIRE(DNS_DB_VALID(db));
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+ REQUIRE((db->attributes & DNS_DBATTR_CACHE) != 0);
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+
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+ if (db->methods->setservestalettl != NULL)
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+ return ((db->methods->setservestalettl)(db, ttl));
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+ return (ISC_R_NOTIMPLEMENTED);
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+}
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+
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+isc_result_t
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+dns_db_getservestalettl(dns_db_t *db, dns_ttl_t *ttl)
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+{
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+ REQUIRE(DNS_DB_VALID(db));
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+ REQUIRE((db->attributes & DNS_DBATTR_CACHE) != 0);
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+
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+ if (db->methods->getservestalettl != NULL)
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+ return ((db->methods->getservestalettl)(db, ttl));
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+ return (ISC_R_NOTIMPLEMENTED);
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+}
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diff --git a/lib/dns/ecdb.c b/lib/dns/ecdb.c
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index 47994ea..23bfe7d 100644
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--- a/lib/dns/ecdb.c
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+++ b/lib/dns/ecdb.c
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@@ -588,7 +588,9 @@ static dns_dbmethods_t ecdb_methods = {
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NULL, /* setcachestats */
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NULL, /* hashsize */
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NULL, /* nodefullname */
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- NULL /* getsize */
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+ NULL, /* getsize */
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+ NULL, /* setservestalettl */
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+ NULL /* getservestalettl */
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};
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static isc_result_t
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diff --git a/lib/dns/include/dns/cache.h b/lib/dns/include/dns/cache.h
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index 62797db..714b78e 100644
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--- a/lib/dns/include/dns/cache.h
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+++ b/lib/dns/include/dns/cache.h
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@@ -260,6 +260,27 @@ dns_cache_getcachesize(dns_cache_t *cache);
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* Get the maximum cache size.
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*/
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+void
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+dns_cache_setservestalettl(dns_cache_t *cache, dns_ttl_t ttl);
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+/*%<
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+ * Sets the maximum length of time that cached answers may be retained
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+ * past their normal TTL. Default value for the library is 0, disabling
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+ * the use of stale data.
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+ *
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+ * Requires:
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+ *\li 'cache' to be valid.
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+ */
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+
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+dns_ttl_t
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+dns_cache_getservestalettl(dns_cache_t *cache);
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|
|
+/*%<
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+ * Gets the maximum length of time that cached answers may be kept past
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+ * normal expiry.
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|
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+ *
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+ * Requires:
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+ *\li 'cache' to be valid.
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+ */
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+
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isc_result_t
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dns_cache_flush(dns_cache_t *cache);
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|
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/*%<
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diff --git a/lib/dns/include/dns/db.h b/lib/dns/include/dns/db.h
|
2020-07-28 07:51:19 +00:00
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index 6f0eed0..e3917f2 100644
|
2020-01-21 22:30:08 +00:00
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|
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--- a/lib/dns/include/dns/db.h
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+++ b/lib/dns/include/dns/db.h
|
2020-07-28 07:51:19 +00:00
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@@ -195,6 +195,8 @@ typedef struct dns_dbmethods {
|
2020-01-21 22:30:08 +00:00
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dns_name_t *name);
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isc_result_t (*getsize)(dns_db_t *db, dns_dbversion_t *version,
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uint64_t *records, uint64_t *bytes);
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+ isc_result_t (*setservestalettl)(dns_db_t *db, dns_ttl_t ttl);
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+ isc_result_t (*getservestalettl)(dns_db_t *db, dns_ttl_t *ttl);
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} dns_dbmethods_t;
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|
typedef isc_result_t
|
2020-07-28 07:51:19 +00:00
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@@ -253,6 +255,7 @@ struct dns_dbonupdatelistener {
|
2020-01-21 22:30:08 +00:00
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#define DNS_DBFIND_FORCENSEC3 0x0080
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|
#define DNS_DBFIND_ADDITIONALOK 0x0100
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#define DNS_DBFIND_NOZONECUT 0x0200
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+#define DNS_DBFIND_STALEOK 0x0400
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/*@}*/
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/*@{*/
|
2020-07-28 07:51:19 +00:00
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@@ -1683,6 +1686,38 @@ dns_db_nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name);
|
2020-01-21 22:30:08 +00:00
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* \li 'db' is a valid database
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* \li 'node' and 'name' are not NULL
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*/
|
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+
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+isc_result_t
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+dns_db_setservestalettl(dns_db_t *db, dns_ttl_t ttl);
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|
|
|
+/*%<
|
|
|
|
+ * Sets the maximum length of time that cached answers may be retained
|
|
|
|
+ * past their normal TTL. Default value for the library is 0, disabling
|
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|
|
+ * the use of stale data.
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|
|
+ *
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+ * Requires:
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|
|
+ * \li 'db' is a valid cache database.
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|
|
+ * \li 'ttl' is the number of seconds to retain data past its normal expiry.
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+ *
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|
+ * Returns:
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|
+ * \li #ISC_R_SUCCESS
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|
+ * \li #ISC_R_NOTIMPLEMENTED - Not supported by this DB implementation.
|
|
|
|
+ */
|
|
|
|
+
|
|
|
|
+isc_result_t
|
|
|
|
+dns_db_getservestalettl(dns_db_t *db, dns_ttl_t *ttl);
|
|
|
|
+/*%<
|
|
|
|
+ * Gets maximum length of time that cached answers may be kept past
|
|
|
|
+ * normal TTL expiration.
|
|
|
|
+ *
|
|
|
|
+ * Requires:
|
|
|
|
+ * \li 'db' is a valid cache database.
|
|
|
|
+ * \li 'ttl' is the number of seconds to retain data past its normal expiry.
|
|
|
|
+ *
|
|
|
|
+ * Returns:
|
|
|
|
+ * \li #ISC_R_SUCCESS
|
|
|
|
+ * \li #ISC_R_NOTIMPLEMENTED - Not supported by this DB implementation.
|
|
|
|
+ */
|
|
|
|
+
|
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|
|
ISC_LANG_ENDDECLS
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|
#endif /* DNS_DB_H */
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|
diff --git a/lib/dns/include/dns/rdataset.h b/lib/dns/include/dns/rdataset.h
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|
|
index 5295d8e..97071ed 100644
|
|
|
|
--- a/lib/dns/include/dns/rdataset.h
|
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|
|
+++ b/lib/dns/include/dns/rdataset.h
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|
|
@@ -128,6 +128,7 @@ struct dns_rdataset {
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|
|
unsigned int magic; /* XXX ? */
|
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|
|
dns_rdatasetmethods_t * methods;
|
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|
|
ISC_LINK(dns_rdataset_t) link;
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* XXX do we need these, or should they be retrieved by methods?
|
|
|
|
* Leaning towards the latter, since they are not frequently required
|
|
|
|
@@ -136,12 +137,19 @@ struct dns_rdataset {
|
|
|
|
dns_rdataclass_t rdclass;
|
|
|
|
dns_rdatatype_t type;
|
|
|
|
dns_ttl_t ttl;
|
|
|
|
+ /*
|
|
|
|
+ * Stale ttl is used to see how long this RRset can still be used
|
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|
|
+ * to serve to clients, after the TTL has expired.
|
|
|
|
+ */
|
|
|
|
+ dns_ttl_t stale_ttl;
|
|
|
|
dns_trust_t trust;
|
|
|
|
dns_rdatatype_t covers;
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* attributes
|
|
|
|
*/
|
|
|
|
unsigned int attributes;
|
|
|
|
+
|
|
|
|
/*%
|
|
|
|
* the counter provides the starting point in the "cyclic" order.
|
|
|
|
* The value UINT32_MAX has a special meaning of "picking up a
|
|
|
|
@@ -149,11 +157,13 @@ struct dns_rdataset {
|
|
|
|
* increment the counter.
|
|
|
|
*/
|
|
|
|
uint32_t count;
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* This RRSIG RRset should be re-generated around this time.
|
|
|
|
* Only valid if DNS_RDATASETATTR_RESIGN is set in attributes.
|
|
|
|
*/
|
|
|
|
isc_stdtime_t resign;
|
|
|
|
+
|
|
|
|
/*@{*/
|
|
|
|
/*%
|
|
|
|
* These are for use by the rdataset implementation, and MUST NOT
|
|
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@@ -206,6 +216,7 @@ struct dns_rdataset {
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#define DNS_RDATASETATTR_OPTOUT 0x00100000 /*%< OPTOUT proof */
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#define DNS_RDATASETATTR_NEGATIVE 0x00200000
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#define DNS_RDATASETATTR_PREFETCH 0x00400000
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+#define DNS_RDATASETATTR_STALE 0x01000000
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/*%
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* _OMITDNSSEC:
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diff --git a/lib/dns/include/dns/resolver.h b/lib/dns/include/dns/resolver.h
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2020-07-28 07:51:19 +00:00
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index 0b66c75..4b4b6bd 100644
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2020-01-21 22:30:08 +00:00
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--- a/lib/dns/include/dns/resolver.h
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+++ b/lib/dns/include/dns/resolver.h
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@@ -547,9 +547,12 @@ dns_resolver_getmustbesecure(dns_resolver_t *resolver, dns_name_t *name);
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void
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-dns_resolver_settimeout(dns_resolver_t *resolver, unsigned int seconds);
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+dns_resolver_settimeout(dns_resolver_t *resolver, unsigned int timeout);
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/*%<
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- * Set the length of time the resolver will work on a query, in seconds.
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+ * Set the length of time the resolver will work on a query, in milliseconds.
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+ *
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+ * 'timeout' was originally defined in seconds, and later redefined to be in
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+ * milliseconds. Values less than or equal to 300 are treated as seconds.
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*
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* If timeout is 0, the default timeout will be applied.
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*
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@@ -560,7 +563,8 @@ dns_resolver_settimeout(dns_resolver_t *resolver, unsigned int seconds);
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unsigned int
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dns_resolver_gettimeout(dns_resolver_t *resolver);
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/*%<
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- * Get the current length of time the resolver will work on a query, in seconds.
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+ * Get the current length of time the resolver will work on a query,
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+ * in milliseconds.
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*
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* Requires:
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* \li resolver to be valid.
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@@ -582,6 +586,39 @@ dns_resolver_getzeronosoattl(dns_resolver_t *resolver);
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void
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dns_resolver_setzeronosoattl(dns_resolver_t *resolver, bool state);
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+unsigned int
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+dns_resolver_getretryinterval(dns_resolver_t *resolver);
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+
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+void
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+dns_resolver_setretryinterval(dns_resolver_t *resolver, unsigned int interval);
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+/*%<
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+ * Sets the amount of time, in millseconds, that is waited for a reply
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+ * to a server before another server is tried. Interacts with the
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+ * value of dns_resolver_getnonbackofftries() by trying that number of times
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+ * at this interval, before doing exponential backoff and doubling the interval
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+ * on each subsequent try, to a maximum of 10 seconds. Defaults to 800 ms;
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+ * silently capped at 2000 ms.
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+ *
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+ * Requires:
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+ * \li resolver to be valid.
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+ * \li interval > 0.
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+ */
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+
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+unsigned int
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+dns_resolver_getnonbackofftries(dns_resolver_t *resolver);
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+
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+void
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+dns_resolver_setnonbackofftries(dns_resolver_t *resolver, unsigned int tries);
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+/*%<
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+ * Sets the number of failures of getting a reply from remote servers for
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+ * a query before backing off by doubling the retry interval for each
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+ * subsequent request sent. Defaults to 3.
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+ *
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+ * Requires:
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+ * \li resolver to be valid.
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+ * \li tries > 0.
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+ */
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+
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unsigned int
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dns_resolver_getoptions(dns_resolver_t *resolver);
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diff --git a/lib/dns/include/dns/types.h b/lib/dns/include/dns/types.h
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index 567e8a8..7bf2b60 100644
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--- a/lib/dns/include/dns/types.h
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+++ b/lib/dns/include/dns/types.h
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@@ -385,6 +385,12 @@ typedef enum {
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dns_updatemethod_date
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} dns_updatemethod_t;
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+typedef enum {
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+ dns_stale_answer_no,
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+ dns_stale_answer_yes,
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+ dns_stale_answer_conf
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+} dns_stale_answer_t;
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+
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/*
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* Functions.
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*/
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diff --git a/lib/dns/include/dns/view.h b/lib/dns/include/dns/view.h
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index c849dec..647ca2a 100644
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--- a/lib/dns/include/dns/view.h
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+++ b/lib/dns/include/dns/view.h
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@@ -229,6 +229,9 @@ struct dns_view {
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dns_dtenv_t *dtenv; /* Dnstap environment */
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dns_dtmsgtype_t dttypes; /* Dnstap message types
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to log */
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+ dns_ttl_t staleanswerttl;
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+ dns_stale_answer_t staleanswersok; /* rndc setting */
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+ bool staleanswersenable; /* named.conf setting */
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};
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#define DNS_VIEW_MAGIC ISC_MAGIC('V','i','e','w')
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diff --git a/lib/dns/master.c b/lib/dns/master.c
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2020-07-28 07:51:19 +00:00
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index 8edd732..8c9f00e 100644
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2020-01-21 22:30:08 +00:00
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--- a/lib/dns/master.c
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+++ b/lib/dns/master.c
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@@ -1948,12 +1948,18 @@ load_text(dns_loadctx_t *lctx) {
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if ((lctx->options & DNS_MASTER_AGETTL) != 0) {
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/*
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- * Adjust the TTL for $DATE. If the RR has already
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- * expired, ignore it.
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+ * Adjust the TTL for $DATE. If the RR has
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+ * already expired, set its TTL to 0. This
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+ * should be okay even if the TTL stretching
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+ * feature is not in effect, because it will
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+ * just be quickly expired by the cache, and the
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+ * way this was written before the patch it
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+ * could potentially add 0 TTLs anyway.
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*/
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if (lctx->ttl < ttl_offset)
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- continue;
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- lctx->ttl -= ttl_offset;
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+ lctx->ttl = 0;
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+ else
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+ lctx->ttl -= ttl_offset;
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}
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/*
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diff --git a/lib/dns/masterdump.c b/lib/dns/masterdump.c
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index 13d1a3e..873b694 100644
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--- a/lib/dns/masterdump.c
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+++ b/lib/dns/masterdump.c
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@@ -81,6 +81,9 @@ struct dns_master_style {
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*/
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#define DNS_TOTEXT_LINEBREAK_MAXLEN 100
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+/*% Does the rdataset 'r' contain a stale answer? */
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+#define STALE(r) (((r)->attributes & DNS_RDATASETATTR_STALE) != 0)
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+
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/*%
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* Context structure for a masterfile dump in progress.
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*/
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@@ -94,6 +97,7 @@ typedef struct dns_totext_ctx {
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dns_fixedname_t origin_fixname;
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uint32_t current_ttl;
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bool current_ttl_valid;
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+ dns_ttl_t serve_stale_ttl;
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} dns_totext_ctx_t;
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LIBDNS_EXTERNAL_DATA const dns_master_style_t
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@@ -382,6 +386,7 @@ totext_ctx_init(const dns_master_style_t *style, dns_totext_ctx_t *ctx) {
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ctx->neworigin = NULL;
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ctx->current_ttl = 0;
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ctx->current_ttl_valid = false;
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+ ctx->serve_stale_ttl = 0;
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return (ISC_R_SUCCESS);
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}
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@@ -1028,6 +1033,11 @@ dump_rdatasets_text(isc_mem_t *mctx, dns_name_t *name,
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(ctx->style.flags & DNS_STYLEFLAG_NCACHE) == 0) {
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/* Omit negative cache entries */
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} else {
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+ if (STALE(rds)) {
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+ fprintf(f, "; stale (for %u more seconds)\n",
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+ (rds->stale_ttl -
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+ ctx->serve_stale_ttl));
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+ }
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isc_result_t result =
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dump_rdataset(mctx, name, rds, ctx,
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buffer, f);
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@@ -1496,6 +1506,16 @@ dumpctx_create(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version,
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dns_db_attach(db, &dctx->db);
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dctx->do_date = dns_db_iscache(dctx->db);
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+ if (dctx->do_date) {
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+ /*
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+ * Adjust the date backwards by the serve-stale TTL, if any.
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+ * This is so the TTL will be loaded correctly when next
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+ * started.
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+ */
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+ (void)dns_db_getservestalettl(dctx->db,
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+ &dctx->tctx.serve_stale_ttl);
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+ dctx->now -= dctx->tctx.serve_stale_ttl;
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+ }
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if (dctx->format == dns_masterformat_text &&
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(dctx->tctx.style.flags & DNS_STYLEFLAG_REL_OWNER) != 0) {
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@@ -1555,6 +1575,9 @@ writeheader(dns_dumpctx_t *dctx) {
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* it in the zone case.
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*/
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if (dctx->do_date) {
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+ fprintf(dctx->f,
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+ "; using a %d second stale ttl\n",
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+ dctx->tctx.serve_stale_ttl);
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result = dns_time32_totext(dctx->now, &buffer);
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RUNTIME_CHECK(result == ISC_R_SUCCESS);
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isc_buffer_usedregion(&buffer, &r);
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diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
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2020-07-28 07:51:19 +00:00
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index 02f2c84..fda991d 100644
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2020-01-21 22:30:08 +00:00
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--- a/lib/dns/rbtdb.c
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+++ b/lib/dns/rbtdb.c
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2020-07-28 07:51:19 +00:00
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@@ -490,6 +490,7 @@ typedef ISC_LIST(rdatasetheader_t) rdatasetheaderlist_t;
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2020-01-21 22:30:08 +00:00
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typedef ISC_LIST(dns_rbtnode_t) rbtnodelist_t;
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#define RDATASET_ATTR_NONEXISTENT 0x0001
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+/*%< May be potentially served as stale data. */
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#define RDATASET_ATTR_STALE 0x0002
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#define RDATASET_ATTR_IGNORE 0x0004
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#define RDATASET_ATTR_RETAIN 0x0008
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2020-07-28 07:51:19 +00:00
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@@ -502,6 +503,8 @@ typedef ISC_LIST(dns_rbtnode_t) rbtnodelist_t;
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2020-01-21 22:30:08 +00:00
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#define RDATASET_ATTR_CASESET 0x0400
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#define RDATASET_ATTR_ZEROTTL 0x0800
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#define RDATASET_ATTR_CASEFULLYLOWER 0x1000
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+/*%< Ancient - awaiting cleanup. */
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+#define RDATASET_ATTR_ANCIENT 0x2000
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typedef struct acache_cbarg {
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dns_rdatasetadditional_t type;
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2020-07-28 07:51:19 +00:00
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@@ -552,6 +555,8 @@ struct acachectl {
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2020-01-21 22:30:08 +00:00
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(((header)->attributes & RDATASET_ATTR_ZEROTTL) != 0)
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#define CASEFULLYLOWER(header) \
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(((header)->attributes & RDATASET_ATTR_CASEFULLYLOWER) != 0)
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+#define ANCIENT(header) \
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+ (((header)->attributes & RDATASET_ATTR_ANCIENT) != 0)
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#define ACTIVE(header, now) \
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2020-07-28 07:51:19 +00:00
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@@ -611,6 +616,12 @@ typedef enum {
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2020-01-21 22:30:08 +00:00
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expire_flush
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} expire_t;
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+typedef enum {
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+ rdataset_ttl_fresh,
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+ rdataset_ttl_stale,
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+ rdataset_ttl_ancient
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+} rdataset_ttl_t;
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+
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typedef struct rbtdb_version {
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/* Not locked */
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rbtdb_serial_t serial;
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2020-07-28 07:51:19 +00:00
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@@ -678,6 +689,12 @@ struct dns_rbtdb {
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2020-01-21 22:30:08 +00:00
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dns_dbnode_t *soanode;
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dns_dbnode_t *nsnode;
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+ /*
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+ * Maximum length of time to keep using a stale answer past its
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+ * normal TTL expiry.
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+ */
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+ dns_ttl_t serve_stale_ttl;
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+
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/*
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* This is a linked list used to implement the LRU cache. There will
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* be node_lock_count linked lists here. Nodes in bucket 1 will be
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2020-07-28 07:51:19 +00:00
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@@ -721,6 +738,8 @@ struct dns_rbtdb {
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2020-01-21 22:30:08 +00:00
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#define RBTDB_ATTR_LOADED 0x01
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#define RBTDB_ATTR_LOADING 0x02
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+#define KEEPSTALE(rbtdb) ((rbtdb)->serve_stale_ttl > 0)
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+
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/*%
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* Search Context
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*/
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2020-07-28 07:51:19 +00:00
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@@ -1791,15 +1810,15 @@ rollback_node(dns_rbtnode_t *node, rbtdb_serial_t serial) {
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2020-01-21 22:30:08 +00:00
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}
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static inline void
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-mark_stale_header(dns_rbtdb_t *rbtdb, rdatasetheader_t *header) {
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+mark_header_ancient(dns_rbtdb_t *rbtdb, rdatasetheader_t *header) {
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/*
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- * If we are already stale there is nothing to do.
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+ * If we are already ancient there is nothing to do.
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*/
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- if ((header->attributes & RDATASET_ATTR_STALE) != 0)
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+ if (ANCIENT(header))
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return;
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- header->attributes |= RDATASET_ATTR_STALE;
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+ header->attributes |= RDATASET_ATTR_ANCIENT;
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header->node->dirty = 1;
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/*
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2020-07-28 07:51:19 +00:00
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@@ -1840,8 +1859,8 @@ clean_cache_node(dns_rbtdb_t *rbtdb, dns_rbtnode_t *node) {
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2020-01-21 22:30:08 +00:00
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/*
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* If current is nonexistent or stale, we can clean it up.
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*/
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- if ((current->attributes &
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- (RDATASET_ATTR_NONEXISTENT|RDATASET_ATTR_STALE)) != 0) {
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+ if (NONEXISTENT(current) || ANCIENT(current) ||
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+ (STALE(current) && ! KEEPSTALE(rbtdb))) {
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if (top_prev != NULL)
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top_prev->next = current->next;
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else
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2020-07-28 07:51:19 +00:00
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@@ -2086,6 +2105,80 @@ delete_node(dns_rbtdb_t *rbtdb, dns_rbtnode_t *node) {
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2020-01-21 22:30:08 +00:00
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}
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}
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+#if 0
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+static void
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+clean_now_or_later(dns_rbtnode_t *node, dns_rbtdb_t *rbtdb,
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+ rdatasetheader_t *header, rdatasetheader_t **header_prevp)
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|
+{
|
|
|
|
+ if (dns_rbtnode_refcurrent(node) == 0) {
|
|
|
|
+ isc_mem_t *mctx;
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ * header->down can be non-NULL if the refcount has just
|
|
|
|
+ * decremented to 0 but decrement_reference() has not performed
|
|
|
|
+ * clean_cache_node(), in which case we need to purge the stale
|
|
|
|
+ * headers first.
|
|
|
|
+ */
|
|
|
|
+ mctx = rbtdb->common.mctx;
|
|
|
|
+ clean_stale_headers(rbtdb, mctx, header);
|
|
|
|
+ if (*header_prevp != NULL)
|
|
|
|
+ (*header_prevp)->next = header->next;
|
|
|
|
+ else
|
|
|
|
+ node->data = header->next;
|
|
|
|
+ free_rdataset(rbtdb, mctx, header);
|
|
|
|
+ } else {
|
|
|
|
+ header->attributes |= RDATASET_ATTR_STALE |
|
|
|
|
+ RDATASET_ATTR_ANCIENT;
|
|
|
|
+ node->dirty = 1;
|
|
|
|
+ *header_prevp = header;
|
|
|
|
+ }
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+static rdataset_ttl_t
|
|
|
|
+check_ttl(dns_rbtnode_t *node, rbtdb_search_t *search,
|
|
|
|
+ rdatasetheader_t *header, rdatasetheader_t **header_prevp,
|
|
|
|
+ nodelock_t *lock, isc_rwlocktype_t *locktype)
|
|
|
|
+{
|
|
|
|
+ dns_rbtdb_t *rbtdb = search->rbtdb;
|
|
|
|
+
|
|
|
|
+ if (header->rdh_ttl > search->now)
|
|
|
|
+ return rdataset_ttl_fresh;
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ * This rdataset is stale, but perhaps still usable.
|
|
|
|
+ */
|
|
|
|
+ if (KEEPSTALE(rbtdb) &&
|
|
|
|
+ header->rdh_ttl + rbtdb->serve_stale_ttl > search->now) {
|
|
|
|
+ header->attributes |= RDATASET_ATTR_STALE;
|
|
|
|
+ /* Doesn't set dirty because it doesn't need removal. */
|
|
|
|
+ return rdataset_ttl_stale;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ * This rdataset is so stale it is no longer usable, even with
|
|
|
|
+ * KEEPSTALE. If no one else is using the node, we can clean it up
|
|
|
|
+ * right now, otherwise we mark it as ancient, and the node as dirty,
|
|
|
|
+ * so it will get cleaned up later.
|
|
|
|
+ */
|
|
|
|
+ if ((header->rdh_ttl <= search->now - RBTDB_VIRTUAL) &&
|
|
|
|
+ (*locktype == isc_rwlocktype_write ||
|
|
|
|
+ NODE_TRYUPGRADE(lock) == ISC_R_SUCCESS)) {
|
|
|
|
+ /*
|
|
|
|
+ * We update the node's status only when we can get write
|
|
|
|
+ * access; otherwise, we leave others to this work. Periodical
|
|
|
|
+ * cleaning will eventually take the job as the last resort.
|
|
|
|
+ * We won't downgrade the lock, since other rdatasets are
|
|
|
|
+ * probably stale, too.
|
|
|
|
+ */
|
|
|
|
+ *locktype = isc_rwlocktype_write;
|
|
|
|
+ clean_now_or_later(node, rbtdb, header, header_prevp);
|
|
|
|
+ } else
|
|
|
|
+ *header_prevp = header;
|
|
|
|
+
|
|
|
|
+ return rdataset_ttl_ancient;
|
|
|
|
+}
|
|
|
|
+#endif
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* Caller must be holding the node lock.
|
|
|
|
*/
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -3313,6 +3406,12 @@ bind_rdataset(dns_rbtdb_t *rbtdb, dns_rbtnode_t *node,
|
2020-01-21 22:30:08 +00:00
|
|
|
rdataset->attributes |= DNS_RDATASETATTR_OPTOUT;
|
|
|
|
if (PREFETCH(header))
|
|
|
|
rdataset->attributes |= DNS_RDATASETATTR_PREFETCH;
|
|
|
|
+ if (STALE(header)) {
|
|
|
|
+ rdataset->attributes |= DNS_RDATASETATTR_STALE;
|
|
|
|
+ rdataset->stale_ttl =
|
|
|
|
+ (rbtdb->serve_stale_ttl + header->rdh_ttl) - now;
|
|
|
|
+ rdataset->ttl = 0;
|
|
|
|
+ }
|
|
|
|
rdataset->private1 = rbtdb;
|
|
|
|
rdataset->private2 = node;
|
|
|
|
raw = (unsigned char *)header + sizeof(*header);
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -4653,6 +4752,19 @@ check_stale_header(dns_rbtnode_t *node, rdatasetheader_t *header,
|
2020-01-21 22:30:08 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
if (!ACTIVE(header, search->now)) {
|
|
|
|
+ dns_ttl_t stale = header->rdh_ttl +
|
|
|
|
+ search->rbtdb->serve_stale_ttl;
|
|
|
|
+ /*
|
|
|
|
+ * If this data is in the stale window keep it and if
|
|
|
|
+ * DNS_DBFIND_STALEOK is not set we tell the caller to
|
|
|
|
+ * skip this record.
|
|
|
|
+ */
|
|
|
|
+ if (KEEPSTALE(search->rbtdb) && stale > search->now) {
|
|
|
|
+ header->attributes |= RDATASET_ATTR_STALE;
|
|
|
|
+ *header_prev = header;
|
|
|
|
+ return ((search->options & DNS_DBFIND_STALEOK) == 0);
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
/*
|
|
|
|
* This rdataset is stale. If no one else is using the
|
|
|
|
* node, we can clean it up right now, otherwise we mark
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -4692,7 +4804,7 @@ check_stale_header(dns_rbtnode_t *node, rdatasetheader_t *header,
|
2020-01-21 22:30:08 +00:00
|
|
|
node->data = header->next;
|
|
|
|
free_rdataset(search->rbtdb, mctx, header);
|
|
|
|
} else {
|
|
|
|
- mark_stale_header(search->rbtdb, header);
|
|
|
|
+ mark_header_ancient(search->rbtdb, header);
|
|
|
|
*header_prev = header;
|
|
|
|
}
|
|
|
|
} else
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -5130,7 +5242,7 @@ cache_find(dns_db_t *db, dns_name_t *name, dns_dbversion_t *version,
|
2020-01-21 22:30:08 +00:00
|
|
|
&locktype, lock, &search,
|
|
|
|
&header_prev)) {
|
|
|
|
/* Do nothing. */
|
|
|
|
- } else if (EXISTS(header) && (!STALE(header))) {
|
|
|
|
+ } else if (EXISTS(header) && !ANCIENT(header)) {
|
|
|
|
/*
|
|
|
|
* We now know that there is at least one active
|
|
|
|
* non-stale rdataset at this node.
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -5608,7 +5720,7 @@ expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) {
|
2020-01-21 22:30:08 +00:00
|
|
|
* refcurrent(rbtnode) must be non-zero. This is so
|
|
|
|
* because 'node' is an argument to the function.
|
|
|
|
*/
|
|
|
|
- mark_stale_header(rbtdb, header);
|
|
|
|
+ mark_header_ancient(rbtdb, header);
|
|
|
|
if (log)
|
|
|
|
isc_log_write(dns_lctx, category, module,
|
|
|
|
level, "overmem cache: stale %s",
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -5616,7 +5728,7 @@ expirenode(dns_db_t *db, dns_dbnode_t *node, isc_stdtime_t now) {
|
2020-01-21 22:30:08 +00:00
|
|
|
} else if (force_expire) {
|
|
|
|
if (! RETAIN(header)) {
|
|
|
|
set_ttl(rbtdb, header, 0);
|
|
|
|
- mark_stale_header(rbtdb, header);
|
|
|
|
+ mark_header_ancient(rbtdb, header);
|
|
|
|
} else if (log) {
|
|
|
|
isc_log_write(dns_lctx, category, module,
|
|
|
|
level, "overmem cache: "
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -5873,9 +5985,9 @@ cache_findrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
|
2020-01-21 22:30:08 +00:00
|
|
|
* non-zero. This is so because 'node' is an
|
|
|
|
* argument to the function.
|
|
|
|
*/
|
|
|
|
- mark_stale_header(rbtdb, header);
|
|
|
|
+ mark_header_ancient(rbtdb, header);
|
|
|
|
}
|
|
|
|
- } else if (EXISTS(header) && (!STALE(header))) {
|
|
|
|
+ } else if (EXISTS(header) && !ANCIENT(header)) {
|
|
|
|
if (header->type == matchtype)
|
|
|
|
found = header;
|
|
|
|
else if (header->type == RBTDB_RDATATYPE_NCACHEANY ||
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6167,7 +6279,7 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
|
2020-01-21 22:30:08 +00:00
|
|
|
topheader = topheader->next)
|
|
|
|
{
|
|
|
|
set_ttl(rbtdb, topheader, 0);
|
|
|
|
- mark_stale_header(rbtdb, topheader);
|
|
|
|
+ mark_header_ancient(rbtdb, topheader);
|
|
|
|
}
|
|
|
|
goto find_header;
|
|
|
|
}
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6225,7 +6337,7 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
|
2020-01-21 22:30:08 +00:00
|
|
|
* ncache entry.
|
|
|
|
*/
|
|
|
|
set_ttl(rbtdb, topheader, 0);
|
|
|
|
- mark_stale_header(rbtdb, topheader);
|
|
|
|
+ mark_header_ancient(rbtdb, topheader);
|
|
|
|
topheader = NULL;
|
|
|
|
goto find_header;
|
|
|
|
}
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6263,8 +6375,11 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
|
2020-01-21 22:30:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
- * Trying to add an rdataset with lower trust to a cache DB
|
|
|
|
- * has no effect, provided that the cache data isn't stale.
|
|
|
|
+ * Trying to add an rdataset with lower trust to a cache
|
|
|
|
+ * DB has no effect, provided that the cache data isn't
|
|
|
|
+ * stale. If the cache data is stale, new lower trust
|
|
|
|
+ * data will supersede it below. Unclear what the best
|
|
|
|
+ * policy is here.
|
|
|
|
*/
|
|
|
|
if (rbtversion == NULL && trust < header->trust &&
|
|
|
|
(ACTIVE(header, now) || header_nx)) {
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6293,6 +6408,10 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
|
2020-01-21 22:30:08 +00:00
|
|
|
|
|
|
|
if ((options & DNS_DBADD_EXACT) != 0)
|
|
|
|
flags |= DNS_RDATASLAB_EXACT;
|
|
|
|
+ /*
|
|
|
|
+ * TTL use here is irrelevant to the cache;
|
|
|
|
+ * merge is only done with zonedbs.
|
|
|
|
+ */
|
|
|
|
if ((options & DNS_DBADD_EXACTTTL) != 0 &&
|
|
|
|
newheader->rdh_ttl != header->rdh_ttl)
|
|
|
|
result = DNS_R_NOTEXACT;
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6336,11 +6455,12 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
|
2020-01-21 22:30:08 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
- * Don't replace existing NS, A and AAAA RRsets
|
|
|
|
- * in the cache if they are already exist. This
|
|
|
|
- * prevents named being locked to old servers.
|
|
|
|
- * Don't lower trust of existing record if the
|
|
|
|
- * update is forced.
|
|
|
|
+ * Don't replace existing NS, A and AAAA RRsets in the
|
|
|
|
+ * cache if they are already exist. This prevents named
|
|
|
|
+ * being locked to old servers. Don't lower trust of
|
|
|
|
+ * existing record if the update is forced. Nothing
|
|
|
|
+ * special to be done w.r.t stale data; it gets replaced
|
|
|
|
+ * normally further down.
|
|
|
|
*/
|
|
|
|
if (IS_CACHE(rbtdb) && ACTIVE(header, now) &&
|
|
|
|
header->type == dns_rdatatype_ns &&
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -6511,10 +6631,10 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
|
2020-01-21 22:30:08 +00:00
|
|
|
changed->dirty = true;
|
|
|
|
if (rbtversion == NULL) {
|
|
|
|
set_ttl(rbtdb, header, 0);
|
|
|
|
- mark_stale_header(rbtdb, header);
|
|
|
|
+ mark_header_ancient(rbtdb, header);
|
|
|
|
if (sigheader != NULL) {
|
|
|
|
set_ttl(rbtdb, sigheader, 0);
|
|
|
|
- mark_stale_header(rbtdb, sigheader);
|
|
|
|
+ mark_header_ancient(rbtdb, sigheader);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (rbtversion != NULL && !header_nx) {
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -8331,6 +8451,30 @@ nodefullname(dns_db_t *db, dns_dbnode_t *node, dns_name_t *name) {
|
2020-01-21 22:30:08 +00:00
|
|
|
return (result);
|
|
|
|
}
|
|
|
|
|
|
|
|
+static isc_result_t
|
|
|
|
+setservestalettl(dns_db_t *db, dns_ttl_t ttl) {
|
|
|
|
+ dns_rbtdb_t *rbtdb = (dns_rbtdb_t *)db;
|
|
|
|
+
|
|
|
|
+ REQUIRE(VALID_RBTDB(rbtdb));
|
|
|
|
+ REQUIRE(IS_CACHE(rbtdb));
|
|
|
|
+
|
|
|
|
+ /* currently no bounds checking. 0 means disable. */
|
|
|
|
+ rbtdb->serve_stale_ttl = ttl;
|
|
|
|
+ return ISC_R_SUCCESS;
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+static isc_result_t
|
|
|
|
+getservestalettl(dns_db_t *db, dns_ttl_t *ttl) {
|
|
|
|
+ dns_rbtdb_t *rbtdb = (dns_rbtdb_t *)db;
|
|
|
|
+
|
|
|
|
+ REQUIRE(VALID_RBTDB(rbtdb));
|
|
|
|
+ REQUIRE(IS_CACHE(rbtdb));
|
|
|
|
+
|
|
|
|
+ *ttl = rbtdb->serve_stale_ttl;
|
|
|
|
+ return ISC_R_SUCCESS;
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
+
|
|
|
|
static dns_dbmethods_t zone_methods = {
|
|
|
|
attach,
|
|
|
|
detach,
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -8376,7 +8520,9 @@ static dns_dbmethods_t zone_methods = {
|
2020-01-21 22:30:08 +00:00
|
|
|
NULL,
|
|
|
|
hashsize,
|
|
|
|
nodefullname,
|
|
|
|
- getsize
|
|
|
|
+ getsize,
|
|
|
|
+ NULL,
|
|
|
|
+ NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
static dns_dbmethods_t cache_methods = {
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -8424,7 +8570,9 @@ static dns_dbmethods_t cache_methods = {
|
2020-01-21 22:30:08 +00:00
|
|
|
setcachestats,
|
|
|
|
hashsize,
|
|
|
|
nodefullname,
|
|
|
|
- NULL
|
|
|
|
+ NULL,
|
|
|
|
+ setservestalettl,
|
|
|
|
+ getservestalettl
|
|
|
|
};
|
|
|
|
|
|
|
|
isc_result_t
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -8695,7 +8843,7 @@ dns_rbtdb_create
|
2020-01-21 22:30:08 +00:00
|
|
|
rbtdb->rpzs = NULL;
|
|
|
|
rbtdb->load_rpzs = NULL;
|
|
|
|
rbtdb->rpz_num = DNS_RPZ_INVALID_NUM;
|
|
|
|
-
|
|
|
|
+ rbtdb->serve_stale_ttl = 0;
|
|
|
|
/*
|
|
|
|
* Version Initialization.
|
|
|
|
*/
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -9113,7 +9261,8 @@ rdatasetiter_first(dns_rdatasetiter_t *iterator) {
|
2020-01-21 22:30:08 +00:00
|
|
|
* rdatasets to work.
|
|
|
|
*/
|
|
|
|
if (NONEXISTENT(header) ||
|
|
|
|
- (now != 0 && now > header->rdh_ttl))
|
|
|
|
+ (now != 0 && now > header->rdh_ttl
|
|
|
|
+ + rbtdb->serve_stale_ttl))
|
|
|
|
header = NULL;
|
|
|
|
break;
|
|
|
|
} else
|
2020-07-28 07:51:19 +00:00
|
|
|
@@ -10322,7 +10471,7 @@ static inline bool
|
2020-01-21 22:30:08 +00:00
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need_headerupdate(rdatasetheader_t *header, isc_stdtime_t now) {
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if ((header->attributes &
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(RDATASET_ATTR_NONEXISTENT |
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- RDATASET_ATTR_STALE |
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+ RDATASET_ATTR_ANCIENT |
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RDATASET_ATTR_ZEROTTL)) != 0)
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return (false);
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2020-07-28 07:51:19 +00:00
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@@ -10428,7 +10577,7 @@ expire_header(dns_rbtdb_t *rbtdb, rdatasetheader_t *header,
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2020-01-21 22:30:08 +00:00
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bool tree_locked, expire_t reason)
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{
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set_ttl(rbtdb, header, 0);
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- mark_stale_header(rbtdb, header);
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+ mark_header_ancient(rbtdb, header);
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/*
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* Caller must hold the node (write) lock.
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diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
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2020-07-28 07:51:19 +00:00
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index 337a2f3..24e14d2 100644
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2020-01-21 22:30:08 +00:00
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--- a/lib/dns/resolver.c
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+++ b/lib/dns/resolver.c
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@@ -141,16 +141,17 @@
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#endif /* WANT_QUERYTRACE */
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#define US_PER_SEC 1000000U
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+#define US_PER_MSEC 1000U
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/*
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* The maximum time we will wait for a single query.
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*/
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-#define MAX_SINGLE_QUERY_TIMEOUT 9U
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-#define MAX_SINGLE_QUERY_TIMEOUT_US (MAX_SINGLE_QUERY_TIMEOUT*US_PER_SEC)
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+#define MAX_SINGLE_QUERY_TIMEOUT 9000U
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+#define MAX_SINGLE_QUERY_TIMEOUT_US (MAX_SINGLE_QUERY_TIMEOUT*US_PER_MSEC)
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/*
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* We need to allow a individual query time to complete / timeout.
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*/
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-#define MINIMUM_QUERY_TIMEOUT (MAX_SINGLE_QUERY_TIMEOUT + 1U)
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+#define MINIMUM_QUERY_TIMEOUT (MAX_SINGLE_QUERY_TIMEOUT + 1000U)
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/* The default time in seconds for the whole query to live. */
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#ifndef DEFAULT_QUERY_TIMEOUT
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@@ -159,7 +160,7 @@
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/* The maximum time in seconds for the whole query to live. */
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#ifndef MAXIMUM_QUERY_TIMEOUT
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-#define MAXIMUM_QUERY_TIMEOUT 30
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+#define MAXIMUM_QUERY_TIMEOUT 30000
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#endif
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/* The default maximum number of recursions to follow before giving up. */
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2020-07-28 07:51:19 +00:00
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@@ -515,6 +516,11 @@ struct dns_resolver {
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dns_fetch_t * primefetch;
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/* Locked by nlock. */
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unsigned int nfctx;
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+
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+ /* Unlocked. Additions for serve-stale feature. */
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2020-01-21 22:30:08 +00:00
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+ unsigned int retryinterval; /* in milliseconds */
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+ unsigned int nonbackofftries;
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+
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2020-07-28 07:51:19 +00:00
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};
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#define RES_MAGIC ISC_MAGIC('R', 'e', 's', '!')
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@@ -1625,14 +1631,12 @@ fctx_setretryinterval(fetchctx_t *fctx, unsigned int rtt) {
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2020-01-21 22:30:08 +00:00
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unsigned int seconds;
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unsigned int us;
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+ us = fctx->res->retryinterval * 1000;
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/*
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- * We retry every .8 seconds the first two times through the address
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- * list, and then we do exponential back-off.
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+ * Exponential backoff after the first few tries.
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*/
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- if (fctx->restarts < 3)
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- us = 800000;
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- else
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- us = (800000 << (fctx->restarts - 2));
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+ if (fctx->restarts >= fctx->res->nonbackofftries)
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+ us <<= (fctx->restarts - fctx->res->nonbackofftries - 1);
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/*
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* Add a fudge factor to the expected rtt based on the current
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2020-07-28 07:51:19 +00:00
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@@ -4494,7 +4498,8 @@ fctx_create(dns_resolver_t *res, dns_name_t *name, dns_rdatatype_t type,
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2020-01-21 22:30:08 +00:00
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/*
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* Compute an expiration time for the entire fetch.
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*/
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- isc_interval_set(&interval, res->query_timeout, 0);
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+ isc_interval_set(&interval, res->query_timeout / 1000,
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+ res->query_timeout % 1000 * 1000000);
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iresult = isc_time_nowplusinterval(&fctx->expires, &interval);
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if (iresult != ISC_R_SUCCESS) {
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UNEXPECTED_ERROR(__FILE__, __LINE__,
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2020-07-28 07:51:19 +00:00
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@@ -8983,6 +8988,8 @@ dns_resolver_create(dns_view_t *view,
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2020-01-21 22:30:08 +00:00
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res->spillattimer = NULL;
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res->zspill = 0;
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res->zero_no_soa_ttl = false;
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+ res->retryinterval = 30000;
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+ res->nonbackofftries = 3;
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res->query_timeout = DEFAULT_QUERY_TIMEOUT;
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res->maxdepth = DEFAULT_RECURSION_DEPTH;
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res->maxqueries = DEFAULT_MAX_QUERIES;
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2020-07-28 07:51:19 +00:00
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@@ -10317,17 +10324,20 @@ dns_resolver_gettimeout(dns_resolver_t *resolver) {
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2020-01-21 22:30:08 +00:00
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}
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void
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-dns_resolver_settimeout(dns_resolver_t *resolver, unsigned int seconds) {
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+dns_resolver_settimeout(dns_resolver_t *resolver, unsigned int timeout) {
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REQUIRE(VALID_RESOLVER(resolver));
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- if (seconds == 0)
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- seconds = DEFAULT_QUERY_TIMEOUT;
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- if (seconds > MAXIMUM_QUERY_TIMEOUT)
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- seconds = MAXIMUM_QUERY_TIMEOUT;
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- if (seconds < MINIMUM_QUERY_TIMEOUT)
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- seconds = MINIMUM_QUERY_TIMEOUT;
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+ if (timeout <= 300)
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+ timeout *= 1000;
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+
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+ if (timeout == 0)
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+ timeout = DEFAULT_QUERY_TIMEOUT;
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+ if (timeout > MAXIMUM_QUERY_TIMEOUT)
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+ timeout = MAXIMUM_QUERY_TIMEOUT;
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+ if (timeout < MINIMUM_QUERY_TIMEOUT)
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+ timeout = MINIMUM_QUERY_TIMEOUT;
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- resolver->query_timeout = seconds;
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+ resolver->query_timeout = timeout;
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}
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void
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2020-07-28 07:51:19 +00:00
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@@ -10424,3 +10434,34 @@ dns_resolver_getquotaresponse(dns_resolver_t *resolver, dns_quotatype_t which)
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2020-01-21 22:30:08 +00:00
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return (resolver->quotaresp[which]);
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}
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+
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+unsigned int
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+dns_resolver_getretryinterval(dns_resolver_t *resolver) {
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+ REQUIRE(VALID_RESOLVER(resolver));
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+
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+ return (resolver->retryinterval);
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+}
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+
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+void
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+dns_resolver_setretryinterval(dns_resolver_t *resolver, unsigned int interval)
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+{
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+ REQUIRE(VALID_RESOLVER(resolver));
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+ REQUIRE(interval > 0);
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+
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+ resolver->retryinterval = ISC_MIN(interval, 2000);
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+}
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+
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+unsigned int
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+dns_resolver_getnonbackofftries(dns_resolver_t *resolver) {
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+ REQUIRE(VALID_RESOLVER(resolver));
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+
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+ return (resolver->nonbackofftries);
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+}
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+
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+void
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+dns_resolver_setnonbackofftries(dns_resolver_t *resolver, unsigned int tries) {
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+ REQUIRE(VALID_RESOLVER(resolver));
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+ REQUIRE(tries > 0);
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+
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+ resolver->nonbackofftries = tries;
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+}
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diff --git a/lib/dns/sdb.c b/lib/dns/sdb.c
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index d4c8c67..ee9be79 100644
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--- a/lib/dns/sdb.c
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+++ b/lib/dns/sdb.c
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@@ -1368,7 +1368,9 @@ static dns_dbmethods_t sdb_methods = {
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NULL, /* setcachestats */
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NULL, /* hashsize */
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NULL, /* nodefullname */
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- NULL /* getsize */
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+ NULL, /* getsize */
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+ NULL, /* setservestalettl */
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+ NULL /* getservestalettl */
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};
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static isc_result_t
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diff --git a/lib/dns/sdlz.c b/lib/dns/sdlz.c
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index 0b9620c..331992e 100644
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--- a/lib/dns/sdlz.c
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+++ b/lib/dns/sdlz.c
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@@ -1336,7 +1336,9 @@ static dns_dbmethods_t sdlzdb_methods = {
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NULL, /* setcachestats */
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NULL, /* hashsize */
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NULL, /* nodefullname */
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- NULL /* getsize */
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+ NULL, /* getsize */
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+ NULL, /* setservestalettl */
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+ NULL /* getservestalettl */
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};
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/*
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diff --git a/lib/dns/tests/db_test.c b/lib/dns/tests/db_test.c
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2020-07-28 07:51:19 +00:00
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index 2849775..812f750 100644
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2020-01-21 22:30:08 +00:00
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--- a/lib/dns/tests/db_test.c
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+++ b/lib/dns/tests/db_test.c
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@@ -28,8 +28,9 @@
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#include <dns/db.h>
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#include <dns/dbiterator.h>
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-#include <dns/name.h>
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#include <dns/journal.h>
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+#include <dns/name.h>
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+#include <dns/rdatalist.h>
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#include "dnstest.h"
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@@ -76,7 +77,7 @@ getoriginnode_test(void **state) {
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_create(mymctx, "rbt", dns_rootname, dns_dbtype_zone,
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- dns_rdataclass_in, 0, NULL, &db);
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+ dns_rdataclass_in, 0, NULL, &db);
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assert_int_equal(result, ISC_R_SUCCESS);
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result = dns_db_getoriginnode(db, &node);
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@@ -91,6 +92,197 @@ getoriginnode_test(void **state) {
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isc_mem_detach(&mymctx);
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}
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+/* test getservestalettl and setservestalettl */
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+static void
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+getsetservestalettl_test(void **state) {
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+ dns_db_t *db = NULL;
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+ isc_mem_t *mymctx = NULL;
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+ isc_result_t result;
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+ dns_ttl_t ttl;
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+
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+ UNUSED(state);
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+
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+ result = isc_mem_create(0, 0, &mymctx);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+
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+ result = dns_db_create(mymctx, "rbt", dns_rootname, dns_dbtype_cache,
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+ dns_rdataclass_in, 0, NULL, &db);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+
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+ ttl = 5000;
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+ result = dns_db_getservestalettl(db, &ttl);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+ assert_int_equal(ttl, 0);
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+
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+ ttl = 6 * 3600;
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+ result = dns_db_setservestalettl(db, ttl);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+
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+ ttl = 5000;
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+ result = dns_db_getservestalettl(db, &ttl);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+ assert_int_equal(ttl, 6 * 3600);
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+
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+ dns_db_detach(&db);
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+ isc_mem_detach(&mymctx);
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+}
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+
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+/* check DNS_DBFIND_STALEOK works */
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+static void
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+dns_dbfind_staleok_test(void **state) {
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+ dns_db_t *db = NULL;
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+ dns_dbnode_t *node = NULL;
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+ dns_fixedname_t example_fixed;
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+ dns_fixedname_t found_fixed;
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+ dns_name_t *example;
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+ dns_name_t *found;
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+ dns_rdatalist_t rdatalist;
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+ dns_rdataset_t rdataset;
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+ int count;
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+ int pass;
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+ isc_mem_t *mymctx = NULL;
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+ isc_result_t result;
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+ unsigned char data[] = { 0x0a, 0x00, 0x00, 0x01 };
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+
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+ UNUSED(state);
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+
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+ result = isc_mem_create(0, 0, &mymctx);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+
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+ result = dns_db_create(mymctx, "rbt", dns_rootname, dns_dbtype_cache,
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+ dns_rdataclass_in, 0, NULL, &db);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+
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+ example = dns_fixedname_initname(&example_fixed);
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+ found = dns_fixedname_initname(&found_fixed);
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+
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+ result = dns_name_fromstring(example, "example", 0, NULL);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+
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+ /*
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+ * Pass 0: default; no stale processing permitted.
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+ * Pass 1: stale processing for 1 second.
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+ * Pass 2: stale turned off after being on.
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+ */
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+ for (pass = 0; pass < 3; pass++) {
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+ dns_rdata_t rdata = DNS_RDATA_INIT;
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+
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+ /* 10.0.0.1 */
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+ rdata.data = data;
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+ rdata.length = 4;
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+ rdata.rdclass = dns_rdataclass_in;
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+ rdata.type = dns_rdatatype_a;
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+
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+ dns_rdatalist_init(&rdatalist);
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+ rdatalist.ttl = 2;
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+ rdatalist.type = dns_rdatatype_a;
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+ rdatalist.rdclass = dns_rdataclass_in;
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+ ISC_LIST_APPEND(rdatalist.rdata, &rdata, link);
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+
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+ switch (pass) {
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+ case 0:
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+ /* default: stale processing off */
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+ break;
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+ case 1:
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+ /* turn on stale processing */
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+ result = dns_db_setservestalettl(db, 1);
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+ assert_int_equal(result, ISC_R_SUCCESS);
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+ break;
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+ case 2:
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+ /* turn off stale processing */
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|
|
+ result = dns_db_setservestalettl(db, 0);
|
|
|
|
+ assert_int_equal(result, ISC_R_SUCCESS);
|
|
|
|
+ break;
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ dns_rdataset_init(&rdataset);
|
|
|
|
+ result = dns_rdatalist_tordataset(&rdatalist, &rdataset);
|
|
|
|
+ assert_int_equal(result, ISC_R_SUCCESS);
|
|
|
|
+
|
|
|
|
+ result = dns_db_findnode(db, example, true, &node);
|
|
|
|
+ assert_int_equal(result, ISC_R_SUCCESS);
|
|
|
|
+
|
|
|
|
+ result = dns_db_addrdataset(db, node, NULL, 0, &rdataset, 0,
|
|
|
|
+ NULL);
|
|
|
|
+ assert_int_equal(result, ISC_R_SUCCESS);
|
|
|
|
+
|
|
|
|
+ dns_db_detachnode(db, &node);
|
|
|
|
+ dns_rdataset_disassociate(&rdataset);
|
|
|
|
+
|
|
|
|
+ result = dns_db_find(db, example, NULL, dns_rdatatype_a,
|
|
|
|
+ 0, 0, &node, found, &rdataset, NULL);
|
|
|
|
+ assert_int_equal(result, ISC_R_SUCCESS);
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ * May loop for up to 2 seconds performing non stale lookups.
|
|
|
|
+ */
|
|
|
|
+ count = 0;
|
|
|
|
+ do {
|
|
|
|
+ count++;
|
|
|
|
+ assert_in_range(count, 0, 20); /* loop sanity */
|
|
|
|
+ assert_int_equal(rdataset.attributes &
|
|
|
|
+ DNS_RDATASETATTR_STALE, 0);
|
|
|
|
+ assert_true(rdataset.ttl > 0);
|
|
|
|
+ dns_db_detachnode(db, &node);
|
|
|
|
+ dns_rdataset_disassociate(&rdataset);
|
|
|
|
+
|
|
|
|
+ usleep(100000); /* 100 ms */
|
|
|
|
+
|
|
|
|
+ result = dns_db_find(db, example, NULL,
|
|
|
|
+ dns_rdatatype_a, 0, 0,
|
|
|
|
+ &node, found, &rdataset, NULL);
|
|
|
|
+ } while (result == ISC_R_SUCCESS);
|
|
|
|
+
|
|
|
|
+ assert_int_equal(result, ISC_R_NOTFOUND);
|
|
|
|
+
|
|
|
|
+ /*
|
|
|
|
+ * Check whether we can get stale data.
|
|
|
|
+ */
|
|
|
|
+ result = dns_db_find(db, example, NULL, dns_rdatatype_a,
|
|
|
|
+ DNS_DBFIND_STALEOK, 0,
|
|
|
|
+ &node, found, &rdataset, NULL);
|
|
|
|
+ switch (pass) {
|
|
|
|
+ case 0:
|
|
|
|
+ assert_int_equal(result, ISC_R_NOTFOUND);
|
|
|
|
+ break;
|
|
|
|
+ case 1:
|
|
|
|
+ /*
|
|
|
|
+ * Should loop for 1 second with stale lookups then
|
|
|
|
+ * stop.
|
|
|
|
+ */
|
|
|
|
+ count = 0;
|
|
|
|
+ do {
|
|
|
|
+ count++;
|
|
|
|
+ assert_in_range(count, 0, 49); /* loop sanity */
|
|
|
|
+ assert_int_equal(result, ISC_R_SUCCESS);
|
|
|
|
+ assert_int_equal(rdataset.ttl, 0);
|
|
|
|
+ assert_int_equal(rdataset.attributes &
|
|
|
|
+ DNS_RDATASETATTR_STALE,
|
|
|
|
+ DNS_RDATASETATTR_STALE);
|
|
|
|
+ dns_db_detachnode(db, &node);
|
|
|
|
+ dns_rdataset_disassociate(&rdataset);
|
|
|
|
+
|
|
|
|
+ usleep(100000); /* 100 ms */
|
|
|
|
+
|
|
|
|
+ result = dns_db_find(db, example, NULL,
|
|
|
|
+ dns_rdatatype_a,
|
|
|
|
+ DNS_DBFIND_STALEOK,
|
|
|
|
+ 0, &node, found,
|
|
|
|
+ &rdataset, NULL);
|
|
|
|
+ } while (result == ISC_R_SUCCESS);
|
|
|
|
+ assert_in_range(count, 1, 10);
|
|
|
|
+ assert_int_equal(result, ISC_R_NOTFOUND);
|
|
|
|
+ break;
|
|
|
|
+ case 2:
|
|
|
|
+ assert_int_equal(result, ISC_R_NOTFOUND);
|
|
|
|
+ break;
|
|
|
|
+ }
|
|
|
|
+ }
|
|
|
|
+
|
|
|
|
+ dns_db_detach(&db);
|
|
|
|
+ isc_mem_detach(&mymctx);
|
|
|
|
+}
|
|
|
|
+
|
|
|
|
/* database class */
|
|
|
|
static void
|
|
|
|
class_test(void **state) {
|
|
|
|
@@ -213,6 +405,8 @@ int
|
|
|
|
main(void) {
|
|
|
|
const struct CMUnitTest tests[] = {
|
|
|
|
cmocka_unit_test(getoriginnode_test),
|
|
|
|
+ cmocka_unit_test(getsetservestalettl_test),
|
|
|
|
+ cmocka_unit_test(dns_dbfind_staleok_test),
|
|
|
|
cmocka_unit_test_setup_teardown(class_test,
|
|
|
|
_setup, _teardown),
|
|
|
|
cmocka_unit_test_setup_teardown(dbtype_test,
|
|
|
|
diff --git a/lib/dns/view.c b/lib/dns/view.c
|
2020-07-28 07:51:19 +00:00
|
|
|
index 0fca1d9..55ede81 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/lib/dns/view.c
|
|
|
|
+++ b/lib/dns/view.c
|
|
|
|
@@ -229,6 +229,9 @@ dns_view_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
|
|
|
|
view->flush = false;
|
|
|
|
view->dlv = NULL;
|
|
|
|
view->maxudp = 0;
|
|
|
|
+ view->staleanswerttl = 1;
|
|
|
|
+ view->staleanswersok = dns_stale_answer_conf;
|
|
|
|
+ view->staleanswersenable = false;
|
|
|
|
view->nocookieudp = 0;
|
|
|
|
view->maxbits = 0;
|
|
|
|
view->v4_aaaa = dns_aaaa_ok;
|
|
|
|
diff --git a/lib/isccfg/namedconf.c b/lib/isccfg/namedconf.c
|
2020-07-28 07:51:19 +00:00
|
|
|
index 91693b5..5771774 100644
|
2020-01-21 22:30:08 +00:00
|
|
|
--- a/lib/isccfg/namedconf.c
|
|
|
|
+++ b/lib/isccfg/namedconf.c
|
|
|
|
@@ -1778,6 +1778,7 @@ view_clauses[] = {
|
|
|
|
{ "max-ncache-ttl", &cfg_type_uint32, 0 },
|
|
|
|
{ "max-recursion-depth", &cfg_type_uint32, 0 },
|
|
|
|
{ "max-recursion-queries", &cfg_type_uint32, 0 },
|
|
|
|
+ { "max-stale-ttl", &cfg_type_ttlval, 0 },
|
|
|
|
{ "max-udp-size", &cfg_type_uint32, 0 },
|
|
|
|
{ "message-compression", &cfg_type_boolean, 0 },
|
|
|
|
{ "min-roots", &cfg_type_uint32, CFG_CLAUSEFLAG_NOTIMP },
|
|
|
|
@@ -1806,7 +1807,9 @@ view_clauses[] = {
|
|
|
|
{ "request-nsid", &cfg_type_boolean, 0 },
|
|
|
|
{ "request-sit", &cfg_type_boolean, CFG_CLAUSEFLAG_OBSOLETE },
|
|
|
|
{ "require-server-cookie", &cfg_type_boolean, 0 },
|
|
|
|
+ { "resolver-nonbackoff-tries", &cfg_type_uint32, 0 },
|
|
|
|
{ "resolver-query-timeout", &cfg_type_uint32, 0 },
|
|
|
|
+ { "resolver-retry-interval", &cfg_type_uint32, 0 },
|
|
|
|
{ "response-policy", &cfg_type_rpz, 0 },
|
|
|
|
{ "rfc2308-type1", &cfg_type_boolean, CFG_CLAUSEFLAG_NYI },
|
|
|
|
{ "root-delegation-only", &cfg_type_optional_exclude, 0 },
|
|
|
|
@@ -1815,6 +1818,8 @@ view_clauses[] = {
|
|
|
|
{ "send-cookie", &cfg_type_boolean, 0 },
|
|
|
|
{ "servfail-ttl", &cfg_type_ttlval, 0 },
|
|
|
|
{ "sortlist", &cfg_type_bracketed_aml, 0 },
|
|
|
|
+ { "stale-answer-enable", &cfg_type_boolean, 0 },
|
|
|
|
+ { "stale-answer-ttl", &cfg_type_ttlval, 0 },
|
|
|
|
{ "suppress-initial-notify", &cfg_type_boolean, CFG_CLAUSEFLAG_NYI },
|
|
|
|
{ "topology", &cfg_type_bracketed_aml, CFG_CLAUSEFLAG_NOTIMP },
|
|
|
|
{ "transfer-format", &cfg_type_transferformat, 0 },
|
|
|
|
--
|
2020-07-28 07:51:19 +00:00
|
|
|
2.21.1
|
2020-01-21 22:30:08 +00:00
|
|
|
|