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- Fix for #1114: Fix that cache fill for forward-host names is

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performed, so that with nonzero target-fetch-policy it fetches
  forwarder addresses and uses them from cache. Also updated that
  delegation point cache fill routines use CDflag for AAAA message
  lookups, so that its negative lookup stops a recursion since the
  cache uses the bit for disambiguation for dns64 but the recursion
  uses CDflag for the AAAA target lookups, so the check correctly
  stops a useless recursion by its cache lookup.
This commit is contained in:
W.C.A. Wijngaards
2024-07-31 11:42:44 +02:00
parent 6af28bed08
commit 03b511b1a2
4 changed files with 181 additions and 0 deletions
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testdata/fwd_name_lookup.rpl
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; config options
server:
# must have target-fetch-policy to fetch forward-host name.
target-fetch-policy: "3 2 1 0 0"
qname-minimisation: no
minimal-responses: no
forward-zone:
name: "."
forward-addr: 1.2.3.4
forward-host: ns.example.com
CONFIG_END
SCENARIO_BEGIN Test forward with forward-host lookup for more addresses
; Forward server
RANGE_BEGIN 0 15
ADDRESS 1.2.3.4
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
ns.example.com. IN A
SECTION ANSWER
ns.example.com. IN A 1.2.3.4
ns.example.com. IN A 1.2.3.5
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
ns.example.com. IN AAAA
SECTION ANSWER
SECTION AUTHORITY
example.com. IN SOA ns.example.com. host.example.com. 3 3600 300 86400 3600
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 1.2.3.6
ENTRY_END
RANGE_END
; The forward server gives no answers.
RANGE_BEGIN 20 55
ADDRESS 1.2.3.4
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR SERVFAIL
SECTION QUESTION
www2.example.com. IN A
SECTION ANSWER
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR SERVFAIL
SECTION QUESTION
www3.example.com. IN A
SECTION ANSWER
ENTRY_END
RANGE_END
; The other forward server.
RANGE_BEGIN 20 55
ADDRESS 1.2.3.5
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www2.example.com. IN A
SECTION ANSWER
www2.example.com. IN A 1.2.3.7
ENTRY_END
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
www3.example.com. IN A
SECTION ANSWER
www3.example.com. IN A 1.2.3.8
ENTRY_END
RANGE_END
STEP 1 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www.example.com. IN A
ENTRY_END
; recursion happens here.
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 1.2.3.6
ENTRY_END
; The address 1.2.3.4 is not responding so it has to fail over to the
; address from the name lookup.
STEP 20 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www2.example.com. IN A
ENTRY_END
STEP 30 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
www2.example.com. IN A
SECTION ANSWER
www2.example.com. IN A 1.2.3.7
ENTRY_END
STEP 40 QUERY
ENTRY_BEGIN
REPLY RD
SECTION QUESTION
www3.example.com. IN A
ENTRY_END
STEP 50 CHECK_ANSWER
ENTRY_BEGIN
MATCH all
REPLY QR RD RA NOERROR
SECTION QUESTION
www3.example.com. IN A
SECTION ANSWER
www3.example.com. IN A 1.2.3.8
ENTRY_END
SCENARIO_END