mirror of
https://github.com/NLnetLabs/unbound.git
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73e408f1d0
- Cached messages that reach 0 TTL are considered expired. This prevents Unbound itself from issuing replies with TTL 0 and possibly causing a thundering herd at the last second. Upstream replies of TTL 0 still get the usual pass-through but they are not considered for caching from Unbound or any of its caching modules. - 'serve-expired-reply-ttl' is changed and is now capped by the original TTL value of the record to try and make some sense when replying with expired records. - TTL decoding was updated to adhere to RFC8767 section 4 where a set high-order bit means the value is positive instead of 0.
269 lines
4.3 KiB
Text
269 lines
4.3 KiB
Text
; config options
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server:
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target-fetch-policy: "0 0 0 0 0"
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prefetch: no
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serve-expired: no
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stub-zone:
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name: "."
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stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
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CONFIG_END
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SCENARIO_BEGIN Test TTL for the last zero second of cached messages.
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; K.ROOT-SERVERS.NET.
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RANGE_BEGIN 0 100
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ADDRESS 193.0.14.129
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR NOERROR
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SECTION QUESTION
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. IN NS
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SECTION ANSWER
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. IN NS K.ROOT-SERVERS.NET.
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SECTION ADDITIONAL
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K.ROOT-SERVERS.NET. IN A 193.0.14.129
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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com. IN A
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SECTION AUTHORITY
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com. IN NS a.gtld-servers.net.
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SECTION ADDITIONAL
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a.gtld-servers.net. IN A 192.5.6.30
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA NOERROR
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SECTION QUESTION
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a.gtld-servers.net. IN A
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SECTION ANSWER
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a.gtld-servers.net. IN A 192.5.6.30
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA NOERROR
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SECTION QUESTION
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K.ROOT-SERVERS.NET. IN A
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SECTION ANSWER
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K.ROOT-SERVERS.NET. IN A 193.0.14.129
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA NOERROR
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SECTION QUESTION
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a.gtld-servers.net. IN AAAA
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SECTION AUTHORITY
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. 86400 IN SOA . . 20070304 28800 7200 604800 86400
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA NOERROR
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SECTION QUESTION
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K.ROOT-SERVERS.NET. IN AAAA
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SECTION AUTHORITY
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. 86400 IN SOA . . 20070304 28800 7200 604800 86400
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ENTRY_END
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RANGE_END
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; a.gtld-servers.net.
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RANGE_BEGIN 0 300
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ADDRESS 192.5.6.30
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR NOERROR
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SECTION QUESTION
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com. IN NS
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SECTION ANSWER
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com. IN NS a.gtld-servers.net.
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SECTION ADDITIONAL
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a.gtld-servers.net. IN A 192.5.6.30
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode subdomain
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ADJUST copy_id copy_query
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REPLY QR NOERROR
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SECTION QUESTION
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example.com. IN A
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SECTION AUTHORITY
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ns.example.com. IN A 1.2.3.4
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ENTRY_END
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RANGE_END
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; ns.example.com
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RANGE_BEGIN 0 100
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ADDRESS 1.2.3.4
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA NOERROR
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SECTION QUESTION
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example.com. IN NS
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SECTION ANSWER
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example.com. IN NS ns.example.com.
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SECTION ADDITIONAL
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ns.example.com. IN A 1.2.3.4
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA NOERROR
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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www.example.com. 10 IN A 1.2.3.4
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ENTRY_END
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RANGE_END
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; ns.example.com
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RANGE_BEGIN 100 300
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ADDRESS 1.2.3.4
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA REFUSED
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SECTION QUESTION
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example.com. IN NS
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA REFUSED
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SECTION QUESTION
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ns.example.com. IN A
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR AA REFUSED
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SECTION QUESTION
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ns.example.com. IN AAAA
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ENTRY_END
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ENTRY_BEGIN
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MATCH opcode qtype qname
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ADJUST copy_id
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REPLY QR REFUSED
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SECTION QUESTION
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www.example.com. IN A
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ENTRY_END
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RANGE_END
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STEP 1 TIME_PASSES ELAPSE 10
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STEP 10 QUERY
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ENTRY_BEGIN
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REPLY RD
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SECTION QUESTION
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www.example.com. IN A
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ENTRY_END
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STEP 20 CHECK_ANSWER
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ENTRY_BEGIN
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MATCH all ttl
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REPLY QR RD RA NOERROR
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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www.example.com. 10 IN A 1.2.3.4
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ENTRY_END
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STEP 30 TIME_PASSES ELAPSE 5
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STEP 40 QUERY
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ENTRY_BEGIN
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REPLY RD
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SECTION QUESTION
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www.example.com. IN A
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ENTRY_END
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STEP 50 CHECK_ANSWER
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ENTRY_BEGIN
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MATCH all ttl
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REPLY QR RD RA NOERROR
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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www.example.com. 5 IN A 1.2.3.4
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ENTRY_END
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STEP 60 TIME_PASSES ELAPSE 3
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STEP 70 QUERY
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ENTRY_BEGIN
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REPLY RD
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SECTION QUESTION
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www.example.com. IN A
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ENTRY_END
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STEP 80 CHECK_ANSWER
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ENTRY_BEGIN
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MATCH all ttl
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REPLY QR RD RA NOERROR
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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www.example.com. 2 IN A 1.2.3.4
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ENTRY_END
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STEP 90 TIME_PASSES ELAPSE 1
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STEP 100 QUERY
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ENTRY_BEGIN
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REPLY RD
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SECTION QUESTION
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www.example.com. IN A
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ENTRY_END
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STEP 110 CHECK_ANSWER
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ENTRY_BEGIN
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MATCH all ttl
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REPLY QR RD RA NOERROR
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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www.example.com. 1 IN A 1.2.3.4
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ENTRY_END
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STEP 120 TIME_PASSES ELAPSE 1
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STEP 130 QUERY
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ENTRY_BEGIN
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REPLY RD
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SECTION QUESTION
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www.example.com. IN A
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ENTRY_END
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STEP 140 CHECK_ANSWER
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ENTRY_BEGIN
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MATCH all ttl
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REPLY QR RD RA SERVFAIL
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SECTION QUESTION
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www.example.com. IN A
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SECTION ANSWER
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ENTRY_END
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SCENARIO_END
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