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73 Commits
Author SHA1 Message Date
W.C.A. Wijngaards 9ce52de6c1 - Fix in depth for serve-expired responses from cachedb, that it 
does not store bogus. Thanks to Qifan Zhang, Palo Alto Networks,
  for the report.
 2026-05-20 14:58:26 +02:00
W.C.A. Wijngaards 8ada1bd88d - Fix to relax assertions after the TTL 0 handling change. 
This relaxes an assertion in cachedb (it fails instead),
  and for packet_rrset_copy_region.
 2026-05-08 10:09:41 +02:00
Yorgos Thessalonikefs 2feee13735 - Fix to disallow cache lookup/store in external cachedb when a 
forwarder/stub forbids it with the no-cache option.
 2026-02-23 14:35:50 +01:00
W.C.A. Wijngaards aa4e2a9e69 - Fix to have cachedb not return expired bogus data as non-bogus. 2026-02-23 12:45:14 +01:00
Yorgos Thessalonikefs 73e408f1d0 A few changes for TTL processing: 
- Cached messages that reach 0 TTL are considered expired. This prevents
  Unbound itself from issuing replies with TTL 0 and possibly causing a
  thundering herd at the last second. Upstream replies of TTL 0 still
  get the usual pass-through but they are not considered for caching
  from Unbound or any of its caching modules.
- 'serve-expired-reply-ttl' is changed and is now capped by the original
  TTL value of the record to try and make some sense when replying
  with expired records.
- TTL decoding was updated to adhere to RFC8767 section 4 where a set
  high-order bit means the value is positive instead of 0.
 2025-09-15 10:03:35 +02:00
Yorgos Thessalonikefs d521135f66 Merge branch 'master' into features/no-ttl-zero-cacherep 2025-09-12 15:24:06 +02:00
Yorgos Thessalonikefs c5c5486261 - Fix hash calculation for cachedb to ignore case. Previously, cached 
records there were only relevant for same case queries (if not
  already in Unbound's internal cache).
 2025-02-24 14:47:13 +01:00
W.C.A. Wijngaards 50fcf71f04 - ttl-zero-cacherep, Responses in the last second of their cache TTL, 
get an extra second. That makes the TTL not 0, since they are from
  cache and can be cached by the client.
 2024-11-11 15:43:10 +01:00
W.C.A. Wijngaards d5e91d181b - Fix for the serve expired DNSSEC information fix, it would not allow 
current delegation information be updated in cache. The fix allows
  current delegation and validation recursion information to be
  updated, but as a consequence no longer has certain expired
  information around for later dnssec valid expired responses.
 2024-11-05 10:39:27 +01:00
W.C.A. Wijngaards 5679c8b1df - Fix to limit NSEC TTL for messages from cachedb. Fix to limit the 
prefetch ttl for messages after a CNAME with short TTL.
 2024-10-09 15:28:55 +02:00
Yorgos ThessalonikefsandGitHub 2e398d51ba Fix cache update when serve expired is used (#1143) 
- Fix cache update when serve expired is used in order to not evict
  still usable expired records. Modules are forbidden to update the
  cache if their answer is DNSSEC unchecked or bogus and a valid
  (expired) entry already exists. Bogus replies from the validator are
  also discarded in favor of existing (expired) valid replies.

- serve-expired-ttl-reset should try to keep expired records in the
  cache in case they are reset.
 2024-09-24 16:47:04 +02:00
W.C.A. Wijngaards a335e601e4 ipset-pf-support, move startup and destartup to the front of the module 
func block functions, modstack call deinit function names, and detect
module change when no startup functions are needed.
 2024-07-03 13:53:44 +02:00
W.C.A. Wijngaards ff653a7ef8 Call module init init again, and new function startup and destartup. 
NULL can be used if the function is not used. Open shared ports during
reload. Deinit is called during reload.
 2024-07-01 16:10:07 +02:00
W.C.A. Wijngaards 3953f827fb Merge branch 'master' of https://github.com/madroach/unbound into ipset-pf-support 2024-07-01 14:36:33 +02:00
W.C.A. Wijngaards fbdc06ebc4 - Fix for #1064: Fix that cachedb expired messages are considered 
insecure, and thus can be served to clients when dnssec is enabled.
 2024-05-21 17:06:18 +02:00
W.C.A. Wijngaards da2b307aa3 - Fix #1071: [FR] Clear both in-memory and cachedb module cache with 
`unbound-control flush*` commands.
 2024-05-16 16:56:58 +02:00
W.C.A. Wijngaards 7c5e765b3b - Fix cachedb with serve-expired-client-timeout disabled. The edns 
subnet module deletes global cache and cachedb cache when it
  stores a result, and serve-expired is enabled, so that the global
  reply, that is older than the ecs reply, does not return after
  the ecs reply expires.
 2024-04-26 13:32:15 +02:00
Wouter WijngaardsandGitHub ced9762b14 Merge pull request #1041 from NLnetLabs/stubfwd-unshare 
Stub and Forward unshare
 2024-04-25 11:11:00 +02:00
W.C.A. Wijngaards 491b56d051 - Fixup cachedb to not refetch when serve-expired-client-timeout is 
used.
 2024-04-12 14:22:18 +02:00
W.C.A. Wijngaards 08fb9a9209 - Fix cachedb for serve-expired with serve-expired-client-timeout. 2024-04-12 11:26:53 +02:00
W.C.A. Wijngaards 04ff2672b5 - Fix to not reply serve expired unless enabled for cachedb. 2024-04-10 17:06:01 +02:00
W.C.A. Wijngaards d47849a26e - Fix cachedb for serve-expired with serve-expired-reply-ttl. 2024-04-10 17:01:57 +02:00
W.C.A. Wijngaards d98c7b9ae3 - Implement cachedb-check-when-serve-expired: yes option, default 
is enabled. When serve expired is enabled with cachedb, it first
  checks cachedb before serving the expired response.
 2024-04-10 11:21:28 +02:00
W.C.A. Wijngaards f2fb498c69 - fast-reload, unshare forwards, making the structure locked, with an rwlock. 2024-04-03 13:55:54 +02:00
W.C.A. Wijngaards 47094fd83f Merge branch 'master' into cachedb-no-store 2023-10-11 13:51:34 +02:00
W.C.A. Wijngaards f2528dc3ac - Fix that cachedb does not warn when serve-expired is disabled about 
use of serve-expired-reply-ttl and serve-expired-client-timeout.
 2023-10-11 13:29:56 +02:00
W.C.A. Wijngaards ae96aa0a6d - cachedb-no-store, implement cachedb-no-store: yes configuration option. 2023-10-06 13:22:10 +02:00
W.C.A. Wijngaards 3160d6ac08 - Fix for #925: unbound.service: Main process exited, code=killed, 
status=11/SEGV. Fixes cachedb configuration handling.
 2023-08-21 11:28:49 +02:00
Yorgos ThessalonikefsGitHubWouter Wijngaards
 		5f76e201f0 - For #790: Update formatting in cachedb/cachedb.c 
Co-authored-by: Wouter Wijngaards <wcawijngaards@users.noreply.github.com>
 2023-07-31 10:13:01 +02:00
George Thessalonikefs f97927a47e Merge branch 'master' into features/ede-caching-cachedb 2023-07-30 14:17:52 +02:00
George Thessalonikefs c15cfb4bd9 - Review for #790: Address Wouter's comments. 2023-07-28 16:55:51 +02:00
George Thessalonikefs 3c3fd7a795 - More predictable testing for cachedb. 2023-05-30 23:33:48 +02:00
George Thessalonikefs 4f52be4db9 - Introduce num.query.cachedb to track cache hits for the external cache. 2023-05-30 17:49:50 +02:00
George Thessalonikefs 896f7a8306 - Ignore expired error responses. 2022-11-22 17:44:55 +01:00
TCY16 6dcba49ff1 add cachedb support 2022-11-21 13:23:00 +01:00
W.C.A. Wijngaards 17e5dd6131 - Fix that cachedb does not store failures in the external cache. 2022-10-21 10:11:47 +02:00
W.C.A. Wijngaards f6753a0f10 - Fix the novel ghost domain issues CVE-2022-30698 and CVE-2022-30699. 2022-08-01 13:24:40 +02:00
Tom Carpay e899b4cefe Make explicit whether edns options are parsed from queries or responses 2021-11-15 13:40:51 +00:00
W.C.A. Wijngaards 55ba863440 - Fix that nxdomain synthesis does not happen above the stub or 
forward definition.
 2021-04-13 13:52:57 +02:00
Christopher Zimmermann 1d23e0c920 Merge remote-tracking branch 'upstream/master' 2021-02-03 13:19:19 +01:00
Ubuntu 21f175b1ac Adjust semantics of TTL adjustment after feedback from @wcawijngaards 2020-07-29 15:27:15 +00:00
Ubuntu b5b79e3a36 Add feature to serve original TTLs rather than decrementing ones 2020-07-15 15:15:45 +00:00
Christopher Zimmermann c96e4ca121 allow privileged initialisation of modules 2020-05-10 22:30:25 +02:00
Talkabout b130a8b459 added option 'redis-set-ttl' to define whether ttl should be added to redis records 
added check for redis command 'setex' when initializing redis connection
updated documentation
minor improvements to previous changes
 2020-03-31 12:47:13 +02:00
Talkabout 1ec02f7229 added logic for redis to honor ttl when serve_expired is not enabled 2020-03-29 15:22:10 +02:00
gthessandGitHub f7fe95ad7b Serve stale (#159) 
- Added serve-stale functionality as described in
  draft-ietf-dnsop-serve-stale-10. `serve-expired-*` options can be used
  to configure the behavior.
- Updated cachedb to honor `serve-expired-ttl`; Fixes #107.
- Renamed statistic `num.zero_ttl` to `num.expired` as expired replies
  come with a configurable TTL value (`serve-expired-reply-ttl`).
- Fixed stats when replying with cached, cname-aliased records.
- Added missing default values for redis cachedb backend.
 2020-02-05 14:20:27 +01:00
W.C.A. Wijngaards 079de39b46 - Fix #157: undefined reference to `htobe64'. 2020-01-29 11:56:29 +01:00
W.C.A. Wijngaards 2dcc7016ac - Fix Local Memory Leak in cachedb_init(), 
reported by X41 D-Sec.
 2019-11-20 12:56:39 +01:00
W.C.A. Wijngaards 13d96540de - Use explicit bzero for wiping clear buffer of hash in cachedb, 
reported by Eric Sesterhenn from X41 D-Sec.
 2019-09-11 15:31:03 +02:00
W.C.A. Wijngaards 9b7843f879 - Fix #29: Solaris 11.3 and missing symbols be64toh, htobe64. 2019-05-06 09:26:23 +02:00