diff options
Diffstat (limited to 'testdata/rrset_use_cached.rpl')
| -rw-r--r-- | testdata/rrset_use_cached.rpl | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/testdata/rrset_use_cached.rpl b/testdata/rrset_use_cached.rpl new file mode 100644 index 000000000000..8420ae02afe6 --- /dev/null +++ b/testdata/rrset_use_cached.rpl @@ -0,0 +1,151 @@ +server: + minimal-responses: no + serve-expired: yes + # The value does not matter, we will not simulate delay. + # We do not want only serve-expired because fetches from that + # apply a generous PREFETCH_LEEWAY. + serve-expired-client-timeout: 1000 + # So that we can only have to give one SERVFAIL answer. + outbound-msg-retry: 0 + +forward-zone: name: "." forward-addr: 216.0.0.1 +CONFIG_END + +SCENARIO_BEGIN RRset from cache updates the message TTL. + +STEP 1 QUERY +ENTRY_BEGIN + REPLY RD + SECTION QUESTION + www.example.com. IN A +ENTRY_END +; the query is sent to the forwarder - no cache yet. +STEP 2 CHECK_OUT_QUERY +ENTRY_BEGIN + MATCH qname qtype opcode + SECTION QUESTION + www.example.com. IN A +ENTRY_END +STEP 3 REPLY +ENTRY_BEGIN + MATCH opcode qtype qname + ADJUST copy_id + ; authoritative answer + REPLY QR AA RD RA NOERROR + SECTION QUESTION + www.example.com. IN A + SECTION ANSWER + www.example.com. 5 IN A 10.20.30.40 + SECTION AUTHORITY + example.com. 10 IN NS ns.example.com. + SECTION ADDITIONAL + ns.example.com. 10 IN A 10.20.30.50 +ENTRY_END +STEP 4 CHECK_ANSWER +ENTRY_BEGIN + MATCH all ttl + REPLY QR RD RA + SECTION QUESTION + www.example.com. IN A + SECTION ANSWER + www.example.com. 5 IN A 10.20.30.40 + SECTION AUTHORITY + example.com. 10 IN NS ns.example.com. + SECTION ADDITIONAL + ns.example.com. 10 IN A 10.20.30.50 +ENTRY_END + +; Wait for the A RRSET to expire. +STEP 5 TIME_PASSES ELAPSE 6 + +STEP 6 QUERY +ENTRY_BEGIN + REPLY RD + SECTION QUESTION + www.example.com. IN A +ENTRY_END +; expired answer will not be served due to serve-expired-client-timeout. +STEP 7 CHECK_OUT_QUERY +ENTRY_BEGIN + MATCH qname qtype opcode + SECTION QUESTION + www.example.com. IN A +ENTRY_END +STEP 8 REPLY +ENTRY_BEGIN + MATCH opcode qtype qname + ADJUST copy_id + ; authoritative answer + REPLY QR AA RD RA NOERROR + SECTION QUESTION + www.example.com. IN A + SECTION ANSWER + www.example.com. 5 IN A 10.20.30.40 + SECTION AUTHORITY + example.com. 10 IN NS ns.example.com. + SECTION ADDITIONAL + ns.example.com. 10 IN A 10.20.30.50 +ENTRY_END +; The cached NS related RRSETs will not be overwritten by the fresh answer. +; The message should have a TTL of 4 instead of 5 from above. +STEP 9 CHECK_ANSWER +ENTRY_BEGIN + MATCH all ttl + REPLY QR RD RA + SECTION QUESTION + www.example.com. IN A + SECTION ANSWER + www.example.com. 5 IN A 10.20.30.40 + SECTION AUTHORITY + example.com. 4 IN NS ns.example.com. + SECTION ADDITIONAL + ns.example.com. 4 IN A 10.20.30.50 +ENTRY_END + +; Wait for the NS RRSETs to expire. +STEP 10 TIME_PASSES ELAPSE 5 + +STEP 11 QUERY +ENTRY_BEGIN + REPLY RD + SECTION QUESTION + www.example.com. IN A +ENTRY_END +; The message should be expired, again no expired answer at this point due to +; serve-expired-client-timeout. +STEP 12 CHECK_OUT_QUERY +ENTRY_BEGIN + MATCH qname qtype opcode + SECTION QUESTION + www.example.com. IN A +ENTRY_END +STEP 13 REPLY +ENTRY_BEGIN + MATCH opcode qtype qname + ADJUST copy_id + REPLY QR RD RA SERVFAIL + SECTION QUESTION + www.example.com. IN A +ENTRY_END +; The SERVFAIL will trigger the serve-expired-client-timeout logic to try and +; replace the SERVFAIL with a possible cached (expired) answer. +; The A RRSET would be at 0TTL left (not expired) but the message should have +; been updated to use a TTL of 4 so expired by now. +; If the message TTL was not updated (bug), this message would be treated as +; non-expired and the now expired NS related RRSETs would fail sanity checks +; for non-expired messages. The result would be SERVFAIL here. +STEP 14 CHECK_ANSWER +ENTRY_BEGIN + MATCH all ttl + REPLY QR RD RA + SECTION QUESTION + www.example.com. IN A + SECTION ANSWER + www.example.com. 0 IN A 10.20.30.40 + SECTION AUTHORITY + example.com. 30 IN NS ns.example.com. + SECTION ADDITIONAL + ns.example.com. 30 IN A 10.20.30.50 +ENTRY_END + +SCENARIO_END |