tests-extra: functional tests for 'synth_record' query module

tests-extra/tests/modules/synth_record/data/1.168.192.in-addr.arpa.zone

+$ORIGIN 1.168.192.in-addr.arpa. 
+$TTL 172800     ; 2 days
+@                   IN SOA  localhost root. (
+                                43         ; serial
+                                7200       ; refresh (2 hours)
+                                300        ; retry (5 minutes)
+                                2419200    ; expire (4 weeks)
+                                10800      ; minimum (3 hours)
+                                )
+                        NS      localhost
+
+; Two static records
+42					IN	PTR	static4-a.forward.
+43					IN	PTR	static4-b.forward.

tests-extra/tests/modules/synth_record/data/1.6.b.0.0.0.0.0.0.2.6.2.ip6.arpa.zone

+$ORIGIN 1.6.b.0.0.0.0.0.0.2.6.2.ip6.arpa. 
+$TTL 172800     ; 2 days
+@                   IN SOA  localhost root. (
+                                43         ; serial
+                                7200       ; refresh (2 hours)
+                                300        ; retry (5 minutes)
+                                2419200    ; expire (4 weeks)
+                                10800      ; minimum (3 hours)
+                                )
+                        NS      localhost
+
+; Two static hostnames
+2.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR static6-a.forward.
+3.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0 IN PTR static6-b.forward.

tests-extra/tests/modules/synth_record/data/forward.zone

+$ORIGIN forward.
+$TTL 3600
+
+@	SOA	dns1 hostmaster 2010111213 10800 3600 1209600 7200
+	NS	dns1
+	NS	dns2
+
+dns1	A	192.0.2.1
+	AAAA	2001:DB8::1
+
+dns2	A	192.0.2.2
+	AAAA	2001:DB8::2
+
+; Two static record for each type
+static4-a	IN	A 192.168.1.42
+static4-b	IN	A 192.168.1.43 
+static6-a	IN	AAAA 2620:0:b61::42
+static6-b	IN	AAAA 2620:0:b61::43
+
+; Two aliases
+cname4		IN	CNAME	dynamic4-192-168-1-1
+cname6		IN	CNAME	dynamic6-2620-0000-0b61-0000-0000-0000-0000-0001		

tests-extra/tests/modules/synth_record/test.py

+#!/usr/bin/env python3
+
+''' Check 'synth_record' query module synthetic responses. '''
+
+from dnstest.test import Test
+
+t = Test()
+
+# Zone indexes
+FWD  = 0
+REV4 = 1
+REV6 = 2
+
+# Initialize server configuration
+knot = t.server("knot")
+zone = t.zone("forward.", storage=".") + \
+       t.zone("1.168.192.in-addr.arpa.", storage=".") + \
+       t.zone("1.6.b.0.0.0.0.0.0.2.6.2.ip6.arpa.", storage=".")
+t.link(zone, knot)
+
+# Configure 'synth_record' modules for auto forward/reverse zones
+knot.add_query_module(zone[FWD],  "synth_record", "forward dynamic4- 900 192.168.1.0/25")
+knot.add_query_module(zone[FWD],  "synth_record", "forward dynamic6- 900 2620:0:b61::/52")
+knot.add_query_module(zone[REV4], "synth_record", "reverse dynamic4- forward. 900 192.168.1.0/25")
+knot.add_query_module(zone[REV6], "synth_record", "reverse dynamic6- forward. 900 2620:0:b61::/52")
+
+t.start()
+
+# Static address mapping
+static_map = [ ("192.168.1.42", "42." + zone[REV4].name, "static4-a.forward."),
+               ("2620:0:b61::42", "2.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0." + zone[REV6].name, "static6-a.forward.") ]
+
+# Check static reverse records 
+for (_, reverse, forward) in static_map:
+    resp = knot.dig(reverse, "PTR")
+    resp.check(forward, rcode="NOERROR", flags="QR AA")
+
+# Check static forward records
+for (addr, reverse, forward) in static_map:
+    rrtype = "AAAA" if ":" in addr else "A"
+    resp = knot.dig(forward, rrtype)
+    resp.check(addr, rcode="NOERROR", flags="QR AA")
+
+# Check positive dynamic reverse records
+dynamic_map = [ ("192.168.1.1", "1." + zone[REV4].name, "dynamic4-192-168-1-1." + zone[FWD].name),
+                ("2620:0:b61::1", "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0." + zone[REV6].name, "dynamic6-2620-0000-0b61-0000-0000-0000-0000-0001." + zone[FWD].name) ]
+for (_, reverse, forward) in dynamic_map:
+    resp = knot.dig(reverse, "PTR")
+    resp.check(forward, rcode="NOERROR", flags="QR AA")
+
+# Check positive dynamic forward records
+for (addr, reverse, forward) in dynamic_map:
+    rrtype = "AAAA" if ":" in addr else "A"
+    resp = knot.dig(forward, rrtype)
+    resp.check(addr, rcode="NOERROR", flags="QR AA")
+
+# Check NODATA answer for all records
+for (addr, reverse, forward) in dynamic_map:
+    resp = knot.dig(reverse, "TXT")
+    resp.check(nordata=forward, rcode="NOERROR", flags="QR AA")
+    resp = knot.dig(forward, "TXT")
+    resp.check(nordata=addr, rcode="NOERROR", flags="QR AA")
+
+# Check "out of subnet range" query response
+nxdomain_map = [ ("192.168.1.128", "128." + zone[REV4].name, "dynamic4-192-168-1-128." + zone[FWD].name),
+                 ("2620:0:b61:1000::", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1." + zone[REV6].name, "dynamic6-2620-0000-0b61-1000-0000-0000-0000-0000." + zone[FWD].name) ]
+for (addr, reverse, forward) in nxdomain_map:
+    rrtype = "AAAA" if ":" in addr else "A"
+    resp = knot.dig(reverse, "PTR")
+    resp.check(rcode="NXDOMAIN", flags="QR AA")
+    resp = knot.dig(forward, rrtype)
+    resp.check(rcode="NXDOMAIN", flags="QR AA")
+
+# Check alias leading to synthetic name 
+alias_map = [ ("192.168.1.1", None, "cname4." + zone[FWD].name),
+              ("2620:0:b61::1", None, "cname6." + zone[FWD].name) ]
+for (addr, _, forward) in alias_map:
+    rrtype = "AAAA" if ":" in addr else "A"
+    resp = knot.dig(forward, rrtype)
+    resp.check(addr, rcode="NOERROR", flags="QR AA")
+
+# Check ANY type question
+for (addr, reverse, forward) in dynamic_map:
+    resp = knot.dig(forward, "ANY")
+    resp.check(rcode="NOERROR", flags="QR AA")
+
+t.end()