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; config options
server:
module-config: "validator iterator"
qname-minimisation: "no"
minimal-responses: no
serve-expired: yes
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 NXDOMAIN followed by 0 TTL
; Scenario overview:
; - query for 0ttl.example.com. IN A
; - answer from upstream is NODATA; will be cached for the SOA negative TTL.
; - check that the client gets the NODATA; also cached
; - query again right after the TTL expired
; - this time the server answers with a 0 TTL RRset
; - check that we get the correct answer
; ns.example.com.
RANGE_BEGIN 0 20
ADDRESS 1.2.3.4
; response to A query
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
0ttl.example.com. IN A
SECTION AUTHORITY
example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
ENTRY_END
RANGE_END
; ns.example.com.
RANGE_BEGIN 30 100
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
0ttl.example.com. IN A
SECTION ANSWER
0ttl.example.com. 0 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
0ttl.example.com. IN A
ENTRY_END
; Check that we get the NODATA (will be cached)
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
0ttl.example.com. IN A
SECTION AUTHORITY
example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
ENTRY_END
; Query again
STEP 20 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
0ttl.example.com. IN A
ENTRY_END
; Check that we get the cached NODATA
STEP 30 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
0ttl.example.com. IN A
SECTION AUTHORITY
example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
ENTRY_END
; Wait for the NXDOMAIN to expire
STEP 31 TIME_PASSES ELAPSE 32
; Query again
STEP 40 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
0ttl.example.com. IN A
ENTRY_END
; Check that we get the cached NODATA
STEP 50 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
0ttl.example.com. IN A
SECTION AUTHORITY
example.com IN SOA ns.example.com dns.example.com 1 7200 3600 2419200 10
ENTRY_END
; Query again
STEP 60 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
0ttl.example.com. IN A
ENTRY_END
; Check that we got the correct answer
STEP 70 CHECK_ANSWER
ENTRY_BEGIN
MATCH all ttl
REPLY QR RD RA NOERROR
SECTION QUESTION
0ttl.example.com. IN A
SECTION ANSWER
0ttl.example.com. 0 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
SCENARIO_END
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