; config options server: target-fetch-policy: "0 0 0 0 0" prefetch: "yes" minimal-responses: no stub-zone: name: "." stub-addr: 193.0.14.129 # K.ROOT-SERVERS.NET. CONFIG_END SCENARIO_BEGIN Test resolver prefetch where it fails to fetch ; K.ROOT-SERVERS.NET. RANGE_BEGIN 0 200 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 0 200 ADDRESS 192.5.6.30 ENTRY_BEGIN MATCH opcode qtype qname 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 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 40 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 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. hostmaster.example.com. 1 2 3 4 5 ENTRY_END 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 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. 3600 IN A 10.20.30.40 SECTION AUTHORITY example.com. 3600 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3600 IN A 1.2.3.4 ENTRY_END RANGE_END ; ns.example.com. RANGE_BEGIN 50 100 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 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 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. hostmaster.example.com. 1 2 3 4 5 ENTRY_END ENTRY_BEGIN MATCH opcode qtype qname ADJUST copy_id REPLY QR AA SERVFAIL SECTION QUESTION www.example.com. IN A ;SECTION ANSWER ;www.example.com. 3600 IN A 10.20.30.40 ;SECTION AUTHORITY ;example.com. 3600 IN NS ns.example.com. ;SECTION ADDITIONAL ;ns.example.com. 3600 IN A 1.2.3.4 ENTRY_END RANGE_END ; note ns.example.com range for steps 100 - 160 is not entered ; no queries should be sent there ; ns.example.com. RANGE_BEGIN 160 200 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 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. hostmaster.example.com. 1 2 3 4 5 ENTRY_END 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 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. 3600 IN A 10.20.30.40 SECTION AUTHORITY example.com. 3600 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3600 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 ; recursion happens here. STEP 10 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 3600 IN A 10.20.30.40 SECTION AUTHORITY example.com. 3600 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3600 IN A 1.2.3.4 ENTRY_END ; after 1800 secs still the cached answer STEP 20 TIME_PASSES ELAPSE 1800 STEP 30 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END ; recursion happens here. STEP 40 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 1800 IN A 10.20.30.40 SECTION AUTHORITY example.com. 1800 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 1800 IN A 1.2.3.4 ENTRY_END ; after 1440 we are 360 seconds before the expiry ; (the authority changes behind the scenes to detect new lookup) STEP 50 TIME_PASSES ELAPSE 1440 STEP 60 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END ; recursion happens here. STEP 70 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 360 IN A 10.20.30.40 SECTION AUTHORITY example.com. 360 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 360 IN A 1.2.3.4 ENTRY_END STEP 80 TRAFFIC ; let traffic flow for prefetch to happen ; above a cache reply with 10% of the original TTL ; but the actual cache could have been updated, try to get that STEP 120 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END ; recursion happens here. STEP 130 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 360 IN A 10.20.30.40 SECTION AUTHORITY example.com. 360 IN NS ns.example.com. SECTION ADDITIONAL ; this is picked up from the parent (because this simulation has the ; parent respond with servfail, not actually timeout) ns.example.com. 3600 IN A 1.2.3.4 ENTRY_END ; another query to see if there is another lookup towards the authority ; the server should not send too many queries towards the authority STEP 140 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END ; recursion happens here. STEP 150 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 360 IN A 10.20.30.40 SECTION AUTHORITY example.com. 360 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3600 IN A 1.2.3.4 ENTRY_END ; some time later another query, and now it is fine to bother the authority ; with another lookup attempt. STEP 160 TIME_PASSES ELAPSE 30 ; so we are now 330 seconds before expiry. STEP 170 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END ; recursion happens here. STEP 180 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 330 IN A 10.20.30.40 SECTION AUTHORITY example.com. 330 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3570 IN A 1.2.3.4 ENTRY_END ; now the just-looked-up entry STEP 190 QUERY ENTRY_BEGIN REPLY RD SECTION QUESTION www.example.com. IN A ENTRY_END ; recursion happens here. STEP 200 CHECK_ANSWER ENTRY_BEGIN MATCH all ttl REPLY QR RD RA NOERROR SECTION QUESTION www.example.com. IN A SECTION ANSWER www.example.com. 3600 IN A 10.20.30.40 SECTION AUTHORITY example.com. 3600 IN NS ns.example.com. SECTION ADDITIONAL ns.example.com. 3570 IN A 1.2.3.4 ENTRY_END SCENARIO_END