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; config options
server:
module-config: "validator iterator"
qname-minimisation: "no"
minimal-responses: no
serve-expired: yes
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 without client-timeout and a SERVFAIL upstream reply
; Scenario overview:
; - query for example.com. IN A
; - answer from upstream is SERVFAIL; will be cached for NORR_TTL(5)
; - check that the client gets the SERVFAIL; also cached
; - query again right after the TTL expired
; - cached SERVFAIL should be ignored and upstream queried
; - answer from upstream is still SERVFAIL; the cached error response will be
; refreshed for another NORR_TTL(5)
; - check that the client gets the SERVFAIL
; - query again; the upstream now has the answer available
; - check that we get the refreshed cached response instead
; ns.example.com.
RANGE_BEGIN 0 50
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
; ns.example.com.
RANGE_BEGIN 60 100
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. 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
; Query with RD flag
STEP 0 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
example.com. IN A
ENTRY_END
; Check that we get the SERVFAIL (will be cached)
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA SERVFAIL
SECTION QUESTION
example.com. IN A
ENTRY_END
; Query again
STEP 20 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
example.com. IN A
ENTRY_END
; Check that we get the cached SERVFAIL
STEP 30 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA SERVFAIL
SECTION QUESTION
example.com. IN A
ENTRY_END
; Wait for the SERVFAIL to expire
STEP 31 TIME_PASSES ELAPSE 6
; Query again
STEP 40 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
example.com. IN A
ENTRY_END
; Check that we get the SERVFAIL (will be refreshed)
STEP 50 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA SERVFAIL
SECTION QUESTION
example.com. IN A
ENTRY_END
; Query again, upstream has the real answer available
STEP 60 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
example.com. IN A
ENTRY_END
; Check that we get the refreshed cached SERVFAIL
STEP 70 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA SERVFAIL
SECTION QUESTION
example.com. IN A
ENTRY_END
SCENARIO_END
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