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; This is a comment.
; config options go here.
; extremely small cache to force dropping old records.
server:
msg-cache-size: 1 # one whole byte!
msg-cache-slabs: 1
forward-zone: name: "." forward-addr: 216.0.0.1
CONFIG_END
SCENARIO_BEGIN Old answer is dropped from the cache
STEP 1 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www.example.com. IN A
ENTRY_END
; the query is sent to the forwarder - no cache yet.
STEP 2 CHECK_OUT_QUERY
ENTRY_BEGIN
MATCH qname qtype opcode
SECTION QUESTION
www.example.com. IN A
ENTRY_END
STEP 3 REPLY
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR RD RA NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
SECTION AUTHORITY
www.example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 10.20.30.50
ENTRY_END
STEP 4 CHECK_ANSWER
ENTRY_BEGIN
MATCH opcode qname qtype
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
ENTRY_END
; another query to force the cache to drop the example.com entry.
STEP 11 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www.example.net. IN A
ENTRY_END
; the query is sent to the forwarder - no cache yet.
STEP 12 CHECK_OUT_QUERY
ENTRY_BEGIN
MATCH qname qtype opcode
SECTION QUESTION
www.example.net. IN A
ENTRY_END
STEP 13 REPLY
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR RD RA NOERROR
SECTION QUESTION
www.example.net. IN A
SECTION ANSWER
www.example.net. IN A 10.20.30.40
SECTION AUTHORITY
www.example.net. IN NS ns.example.net.
SECTION ADDITIONAL
ns.example.net. IN A 10.20.30.50
ENTRY_END
STEP 14 CHECK_ANSWER
ENTRY_BEGIN
MATCH opcode qname qtype
SECTION QUESTION
www.example.net. IN A
SECTION ANSWER
www.example.net. IN A 10.20.30.40
ENTRY_END
; query, same as first, but it fell out of the cache.
STEP 21 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www.example.com. IN A
ENTRY_END
STEP 22 CHECK_OUT_QUERY
ENTRY_BEGIN
MATCH qname qtype opcode
SECTION QUESTION
www.example.com. IN A
ENTRY_END
STEP 23 REPLY
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR RD RA NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
SECTION AUTHORITY
www.example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 10.20.30.50
ENTRY_END
STEP 24 CHECK_ANSWER
ENTRY_BEGIN
MATCH opcode qname qtype
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
ENTRY_END
SCENARIO_END
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