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Serve stale (#159)

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- 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.
This commit is contained in:
gthess
2020-02-05 14:20:27 +01:00
committed by GitHub
parent 5980d9c389
commit f7fe95ad7b
38 changed files with 4691 additions and 3212 deletions
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testcode/replay.h
+10 -10
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@@ -74,18 +74,18 @@
* o CHECK_ANSWER - followed by entry
* o CHECK_OUT_QUERY - followed by entry (if copy-id it is also reply).
* o REPLY - followed by entry
* o TIMEOUT
* o TIME_PASSES ELAPSE [seconds] - increase 'now' time counter, can be
* a floating point number.
* TIME_PASSES EVAL [macro] - expanded for seconds to move time.
* o TRAFFIC - like CHECK_ANSWER, causes traffic to flow.
* o TIMEOUT
* o TIME_PASSES ELAPSE [seconds] - increase 'now' time counter, can be
* a floating point number.
* TIME_PASSES EVAL [macro] - expanded for seconds to move time.
* o TRAFFIC - like CHECK_ANSWER, causes traffic to flow.
* actually the traffic flows before this step is taken.
* the step waits for traffic to stop.
* o CHECK_AUTOTRUST [id] - followed by FILE_BEGIN [to match] FILE_END.
* The file contents is macro expanded before match.
* o CHECK_TEMPFILE [fname] - followed by FILE_BEGIN [to match] FILE_END
* o INFRA_RTT [ip] [dp] [rtt] - update infra cache entry with rtt.
* o ERROR
* o CHECK_AUTOTRUST [id] - followed by FILE_BEGIN [to match] FILE_END.
* The file contents is macro expanded before match.
* o CHECK_TEMPFILE [fname] - followed by FILE_BEGIN [to match] FILE_END
* o INFRA_RTT [ip] [dp] [rtt] - update infra cache entry with rtt.
* o ERROR
* ; following entry starts on the next line, ENTRY_BEGIN.
* ; more STEP items
* SCENARIO_END