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; config options
server:
module-config: "validator iterator"
qname-minimisation: "no"
minimal-responses: no
serve-expired: yes
access-control: 127.0.0.1/32 allow_snoop
stub-zone:
name: "example.com"
stub-addr: 1.2.3.4
CONFIG_END
SCENARIO_BEGIN Test serve-expired
; 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 (without the RD bit) right after the TTL expired
; - check that we get the expired cached answer (this should trigger prefetching)
; - query with RD bit and check that the cached record was updated
; 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
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 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. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ENTRY_END
; Wait for the TTL to expire
STEP 11 TIME_PASSES ELAPSE 3601
; Query again without RD bit
STEP 30 QUERY
ENTRY_BEGIN
SECTION QUESTION
example.com. IN A
ENTRY_END
; Check that we got a stale answer
STEP 40 CHECK_ANSWER
ENTRY_BEGIN
MATCH all ttl
REPLY QR RA NOERROR
SECTION QUESTION
example.com. IN A
SECTION ANSWER
example.com. 30 IN A 5.6.7.8
SECTION AUTHORITY
example.com. 30 IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. 30 IN A 1.2.3.4
ENTRY_END
; Query with RD bit (the record should have been prefetched)
STEP 50 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
example.com. IN A
ENTRY_END
STEP 60 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
SCENARIO_END
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