; 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 log-servfail: yes ede: yes ede-serve-expired: yes stub-zone: name: "example.com" stub-addr: 1.2.3.4 CONFIG_END SCENARIO_BEGIN Test serve-expired with client-timeout and a SERVFAIL upstream reply ; 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 after the TTL expired ; - answer from upstream is servfail ; - check that we get the expired cached answer instead ; ns.example.com. RANGE_BEGIN 0 20 ADDRESS 1.2.3.4 ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR NOERROR SECTION QUESTION example.com. 10 IN NS SECTION ANSWER example.com. 10 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 10 IN A 1.2.3.4 ENTRY_END 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. 10 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 10 IN A 1.2.3.4 ENTRY_END RANGE_END ; ns.example.com. RANGE_BEGIN 30 70 ADDRESS 1.2.3.4 ; response to A query ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR AA SERVFAIL SECTION QUESTION example.com. IN A ENTRY_END RANGE_END ; Query with RD flag STEP 1 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION example.com. IN A ENTRY_END ; Check that we got the correct answer (should be cached) STEP 10 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. 10 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 10 IN A 1.2.3.4 ENTRY_END ; Wait for the TTL to expire STEP 11 TIME_PASSES ELAPSE 11 ; Query again STEP 30 QUERY ENTRY_BEGIN REPLY RD DO SECTION QUESTION example.com. IN A ENTRY_END ; Check that we got a stale answer STEP 40 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl ede=3 REPLY QR RD RA DO NOERROR SECTION QUESTION example.com. IN A SECTION ANSWER example.com. 123 IN A 5.6.7.8 SECTION AUTHORITY example.com. 123 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 123 IN A 1.2.3.4 ENTRY_END SCENARIO_END