# config
server:
	send-client-subnet: 1.2.3.4
	max-client-subnet-ipv4: 17
	module-config: "subnetcache iterator"
	qname-minimisation: no
	minimal-responses: yes
	target-fetch-policy: "0 0 0 0 0"

stub-zone:
	name: "."
	stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET.
CONFIG_END

SCENARIO_BEGIN Test subnet with no edns subnet support but it is refused
; The query is sent to a server that does not reply with the edns-subnet
; option. The upstream server sends rcode refused. That results in a
; NULL return_msg.

; K.ROOT-SERVERS.NET.
RANGE_BEGIN 0 100
	ADDRESS 193.0.14.129
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR NOERROR
SECTION QUESTION
. IN NS
SECTION ANSWER
. IN NS K.ROOT-SERVERS.NET.
SECTION ADDITIONAL
K.ROOT-SERVERS.NET. IN A 193.0.14.129
ENTRY_END

ENTRY_BEGIN
MATCH opcode subdomain
ADJUST copy_id copy_query
REPLY QR NOERROR
SECTION QUESTION
com. IN NS
SECTION AUTHORITY
com. IN NS a.gtld-servers.net.
SECTION ADDITIONAL
a.gtld-servers.net. IN A 192.5.6.30
ENTRY_END
RANGE_END

; a.gtld-servers.net.
RANGE_BEGIN 0 100
	ADDRESS 192.5.6.30

ENTRY_BEGIN
MATCH opcode subdomain
ADJUST copy_id copy_query
REPLY QR NOERROR
SECTION QUESTION
example.com. IN NS
SECTION AUTHORITY
example.com. IN NS ns.example.com.
SECTION ADDITIONAL
ns.example.com. IN A 1.2.3.4
ENTRY_END
RANGE_END

; ns.example.com.
RANGE_BEGIN 0 100
	ADDRESS 1.2.3.4

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
example.com. IN NS
SECTION ANSWER
example.com. IN NS ns.example.com.
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
ns.example.com. IN A
SECTION ANSWER
ns.example.com. IN A 1.2.3.4
ENTRY_END

ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
ns.example.com. IN AAAA
SECTION ANSWER
SECTION AUTHORITY
example.com. IN SOA ns.example.com. host.example.com. 4 86400 3600 86400 3600
ENTRY_END

; This matches the no EDNS subnet info queries that are made for the
; fallback without subnet. The answer is refused.
ENTRY_BEGIN
MATCH opcode qtype qname ednsdata
ADJUST copy_id
REPLY QR AA REFUSED
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
;www.example.com. IN A 10.20.30.40
ENTRY_END

; This matches the initial query with edns subnet in the query,
; the answer has no edns subnet in the reply.
ENTRY_BEGIN
MATCH opcode qtype qname
ADJUST copy_id
REPLY QR AA NOERROR
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
www.example.com. IN A 10.20.30.40
ENTRY_END
RANGE_END

STEP 1 QUERY
;ENTRY_BEGIN
;REPLY RD DO
;SECTION QUESTION
;www.example.com. IN A
; but send this query with subnet scope zero in the query, because that
; makes the reply possibly get stored in the cache.
;
; query with subnet 0.0.0.0/0.
ENTRY_BEGIN
HEX_ANSWER_BEGIN
	00 00 01 00 00 01 00 00         ;ID 0
	00 00 00 01 03 77 77 77         ; www.example.com A? (DO)
	07 65 78 61 6d 70 6c 65
	03 63 6f 6d 00 00 01 00
	01 00 00 29 10 00 00 00
	80 00 00 08

	00 08 00 04                     ; OPC, optlen
	00 01 00 00                     ; ip4, scope 0, source 0
	                                ;0.0.0.0/0
HEX_ANSWER_END
ENTRY_END

; recursion happens here.
STEP 10 CHECK_ANSWER
ENTRY_BEGIN
MATCH all ednsdata
REPLY QR RD RA DO SERVFAIL
SECTION QUESTION
www.example.com. IN A
SECTION ANSWER
;www.example.com. IN A 10.20.30.40
ENTRY_END
SCENARIO_END