Test cache update from serve-expired and client-subnet-always-forward

diff --git a/testdata/subnet_prefetch_always_forward.crpl b/testdata/subnet_prefetch_always_forward.crpl
new file mode 100644 (file)
index 0000000..ccfe5df
--- /dev/null
+++ b/testdata/subnet_prefetch_always_forward.crpl
@@ -0,0 +1,167 @@
+; Check if the prefetch option works properly when serve-expired is combined
+; with client-subnet-always-forward for non-ECS clients. The prefetch query
+; needs to result in an outgoing query without ECS.
+
+server:
+       trust-anchor-signaling: no
+       target-fetch-policy: "0 0 0 0 0"
+       serve-expired: yes
+       client-subnet-always-forward: yes
+       module-config: "subnetcache iterator"
+       verbosity: 3
+       access-control: 127.0.0.1 allow_snoop
+       qname-minimisation: no
+       minimal-responses: no
+
+stub-zone:
+       name: "."
+       stub-addr: 193.0.14.129         # K.ROOT-SERVERS.NET.
+CONFIG_END
+
+SCENARIO_BEGIN Test serve-expired and client-subnet-always-forward without ECS in the request
+
+; K.ROOT-SERVERS.NET.
+RANGE_BEGIN 0 100
+       ADDRESS 193.0.14.129
+       ENTRY_BEGIN
+               MATCH opcode qtype qname ednsdata
+               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 qtype qname
+               ADJUST copy_id
+               REPLY QR NOERROR
+               SECTION QUESTION
+                       www.example.com. IN A
+               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 qtype qname ednsdata
+               ADJUST copy_id
+               REPLY QR NOERROR
+               SECTION QUESTION
+                       com. IN NS
+               SECTION ANSWER
+                       com.    IN NS   a.gtld-servers.net.
+               SECTION ADDITIONAL
+                       a.gtld-servers.net.     IN      A       192.5.6.30
+       ENTRY_END
+
+       ENTRY_BEGIN
+               MATCH opcode qtype qname
+               ADJUST copy_id
+               REPLY QR NOERROR
+               SECTION QUESTION
+                       www.example.com. IN A
+               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 NOERROR
+               SECTION QUESTION
+                       example.com. IN NS
+               SECTION ANSWER
+                       example.com.    IN NS   ns.example.com.
+               SECTION ADDITIONAL
+                       ns.example.com.         IN      A       1.2.3.4
+       ENTRY_END
+
+       ; response to query of interest
+       ENTRY_BEGIN
+               MATCH opcode qtype qname
+               ADJUST copy_id
+               REPLY QR NOERROR
+               SECTION QUESTION
+                       www.example.com. IN A
+               SECTION ANSWER
+                       www.example.com. 10 IN A        10.20.30.40
+               SECTION AUTHORITY
+                       example.com.    IN NS   ns.example.com.
+               SECTION ADDITIONAL
+                       ns.example.com.         IN      A       1.2.3.4
+       ENTRY_END
+RANGE_END
+
+STEP 1 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This answer should be in the global cache
+STEP 2 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    10.20.30.40
+SECTION AUTHORITY
+example.com.           IN NS   ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.                IN A    1.2.3.4
+ENTRY_END
+
+; Wait for the TTL to expire
+STEP 3 TIME_PASSES ELAPSE 20
+
+STEP 11 QUERY
+ENTRY_BEGIN
+REPLY RD
+SECTION QUESTION
+www.example.com. IN A
+ENTRY_END
+
+; This record came from the global cache and a prefetch was triggered
+STEP 12 CHECK_ANSWER
+ENTRY_BEGIN
+MATCH all ttl
+REPLY QR RD RA NOERROR
+SECTION QUESTION
+www.example.com.               IN A
+SECTION ANSWER
+www.example.com.       30      IN A    10.20.30.40
+SECTION AUTHORITY
+example.com.           3580    IN NS   ns.example.com.
+SECTION ADDITIONAL
+ns.example.com.                3580    IN A    1.2.3.4
+ENTRY_END
+
+STEP 13 CHECK_OUT_QUERY
+ENTRY_BEGIN
+        MATCH all
+       REPLY NOERROR DO
+        SECTION QUESTION
+                www.example.com. IN A
+ENTRY_END
+
+STEP 14 TRAFFIC
+
+SCENARIO_END