; config options server: module-config: "validator iterator" qname-minimisation: "no" minimal-responses: no serve-expired: yes serve-expired-client-timeout: 1 serve-expired-reply-ttl: 123 ede: yes ede-serve-expired: yes stub-zone: name: "example.com" stub-addr: 1.2.3.4 CONFIG_END SCENARIO_BEGIN Test that no prefetch is triggered for 0TTL records with serve-expired and client-timeout enabled ; Scenario overview: ; - query for example.com. IN A ; - check that we get an answer for example.com. IN A with the correct TTL ; - query again right at the 0TTL cached entry ; - check that we get the cached answer with no prefetching triggered ; ns.example.com. RANGE_BEGIN 0 100 ADDRESS 1.2.3.4 ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR NOERROR SECTION QUESTION example.com. IN NS SECTION ANSWER example.com. IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. IN A 1.2.3.4 ENTRY_END RANGE_END ; ns.example.com. RANGE_BEGIN 0 10 ADDRESS 1.2.3.4 ; response to A query ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR NOERROR SECTION QUESTION example.com. IN A SECTION ANSWER example.com. 10 IN A 5.6.7.8 SECTION AUTHORITY example.com. IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. IN A 1.2.3.4 ENTRY_END RANGE_END ; Query with RD flag STEP 0 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION example.com. IN A ENTRY_END ; Check that we got the correct answer (should be cached) STEP 1 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION example.com. IN A SECTION ANSWER example.com. 10 IN A 5.6.7.8 SECTION AUTHORITY example.com. IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. IN A 1.2.3.4 ENTRY_END ; Wait for the TTL to expire and produce a 0 TTL cached record. STEP 10 TIME_PASSES ELAPSE 10 ; Query again STEP 20 QUERY ENTRY_BEGIN REPLY RD DO SECTION QUESTION example.com. IN A ENTRY_END ; This should come from the cache with no prefetch triggered (earlier bug). STEP 21 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA DO NOERROR SECTION QUESTION example.com. IN A SECTION ANSWER example.com. 0 IN A 5.6.7.8 SECTION AUTHORITY example.com. 3590 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3590 IN A 1.2.3.4 ENTRY_END ; If a prefetch triggers the test will fail with 'messages pending'. SCENARIO_END