Added test for TTL mismatches in DDNS

tests-extra/tests/ddns/ttl/test.py

+#!/usr/bin/env python3
+
+'''TTL mismatch test'''
+
+from dnstest.utils import *
+from dnstest.test import Test
+
+t = Test()
+
+zone = t.zone("example.com.")
+
+master = t.server("knot")
+t.link(zone, master, ddns=True)
+
+t.start()
+
+# Add new RR with different TTL to a RRSet that is already in the zone
+# The UPDATE should be REFUSED
+
+check_log("Add RR with different TTL")
+up = master.update(zone)
+up.add("mail.example.com.", 1000, "A", "1.2.3.4")
+up.send("REFUSED")
+resp = master.dig("mail.example.com.", "A")
+resp.check_record(section="answer", rtype="A", rdata="192.0.2.3")
+resp.check_record(section="answer", rtype="A", nordata="1.2.3.4")
+
+# Try to add two RRs belonging to one RRSet, but with different TTLs
+# The UPDATE should be REFUSED
+# This also tests rollback in case of addition
+
+check_log("Add RRSet with incoherent TTLs")
+up = master.update(zone)
+up.add("test.example.com.", 1000, "A", "1.2.3.4")
+up.add("test.example.com.", 2000, "A", "2.3.4.5")
+up.send("REFUSED")
+resp = master.dig("test.example.com.", "A")
+resp.check(rcode="NXDOMAIN")
+
+# First, delete RRSet already in zone, then add new RR with different TTL
+# The UPDATE should be accepted and the new RR should be present in the zone
+
+check_log("Delete RRSet from zone + add new RR with different TTL instead")
+up = master.update(zone)
+up.delete("mail.example.com.", "A")
+up.add("mail.example.com.", 1000, "A", "1.2.3.4")
+up.send("NOERROR")
+resp = master.dig("mail.example.com.", "ANY")
+resp.check_record(section="answer", rtype="A", ttl="1000", rdata="1.2.3.4")
+resp.check_record(section="answer", rtype="A", nordata="192.0.2.3")
+resp.check_record(section="answer", rtype="AAAA", rdata="2001:db8::3")
+
+# Some prerequisities for the next test
+up = master.update(zone)
+up.add("test2.example.com.", 3600, "A", "1.2.3.4")
+up.add("test2.example.com.", 3600, "A", "2.3.4.5")
+up.send("NOERROR")
+
+# Delete one of RRs in a zone RRSet, then add new RR with different TTL
+# The UPDATE should be REFUSED
+# This also tests rollback in case of deletion
+
+check_log("Delete one RR from a RRSet + try to add RR with different TTL instead")
+up = master.update(zone)
+up.delete("test2.example.com.", "A", "1.2.3.4")
+up.add("test2.example.com.", 1000, "A", "3.4.5.6")
+up.send("REFUSED")
+resp = master.dig("test2.example.com.", "A")
+resp.check_record(section="answer", rtype="A", ttl="3600", rdata="1.2.3.4")
+resp.check_record(section="answer", rtype="A", nordata="3.4.5.6")
+
+# Test for rollback - a lot of changes and a invalid RR
+
+check_log("Rollback test: a lot of changes")
+up = master.update(zone)
+# Add to existing RRSet
+up.add("test2.example.com.", 3600 , "A", "3.4.5.6")
+up.add("test2.example.com.", 3600 , "A", "3.4.5.7")
+# Add new RRSet to an existing node
+up.add("test2.example.com.", 1000, "MX", "10 somewhere.com.");
+# Add new node
+up.add("test3.example.com.", 2000, "A", "5.6.7.8")
+# Remove specific RR
+up.delete("test2.example.com.", "A", "1.2.3.4")
+# Remove whole RRSet
+up.delete("mail.example.com.", "A")
+# Remove whole node
+up.delete("dns1.example.com.", "ANY")
+# Add invalid RR so that the UPDATE is refused
+up.add("test2.example.com.", 1000, "A", "7.8.9.0")
+up.send("REFUSED")
+
+resp = master.dig("test2.example.com.", "ANY")
+resp.check_record(section="answer", rtype="A", ttl="3600", rdata="1.2.3.4")
+resp.check_record(section="answer", rtype="A", ttl="3600", rdata="2.3.4.5")
+resp.check_record(section="answer", rtype="MX", nordata="10 somewhere.com.")
+resp.check_record(section="answer", rtype="A", nordata="7.8.9.0")
+
+resp = master.dig("test3.example.com", "ANY")
+resp.check(rcode="NXDOMAIN")
+
+resp = master.dig("mail.example.com.", "ANY")
+resp.check_record(section="answer", rtype="A", ttl="1000", rdata="1.2.3.4")
+resp.check_record(section="answer", rtype="AAAA", ttl="3600", rdata="2001:db8::3")
+
+resp = master.dig("dns1.example.com.", "ANY")
+resp.check_record(section="answer", rtype="A", ttl="3600", rdata="192.0.2.1")
+resp.check_record(section="answer", rtype="AAAA", ttl="3600", rdata="2001:db8::1")
+
+t.end()
+