public void TestMinimumConfigFile()
{
// The smallest file that you can get away with is an empty zone, which has just an SOA
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
</zone>
" );
var zone = DNSZone.Unserialize(config);
Assert.That(zone.Relays, Is.Empty);
Assert.That(zone.StartOfAuthority, Is.EqualTo(
new DNSRecord(
new Domain("example.com"),
AddressClass.INTERNET,
7200,
new SOAResource(
new Domain("ns.example.com"),
new Domain("admin.example.com"),
0,
3600,
60,
3600,
60))));
}
public void TestEmptyConfigFileFails()
{
// The empty configuration file is not valid, since it lacks a SOA
var config = ParseXML("<zone></zone>");
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public static void Main(string[] args)
{
if (args.Length != 3)
{
Console.WriteLine("Usage: dns-server <config-file> <ip-address> <port>");
Environment.Exit(1);
}
var config = new XmlDocument();
config.Load(args[0]);
var zone = DNSZone.Unserialize(config);
var clock = new StopwatchClock();
var cache = new ResolverCache(clock, 2048);
var resolver = new StubResolver(cache, ResolverUtils.SendQuery);
var query_exec = new QueryExecutor(zone, resolver, cache);
var bind_addr = new IPEndPoint(IPAddress.Parse(args[1]),
int.Parse(args[2]));
var server = new UDPServer(bind_addr, query_exec);
server.Start();
}
public void TestSOABadPrimaryNS()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""3600""
primary-ns=""....example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestSOAMissingMinTTL()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""3600""
primary-ns=""ns.example.com"" hostmaster=""hostmaster.example.com""
refresh=""3600"" retry=""3600"" expire=""3600"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestHighTTLFails()
{
// TTLs are 32-bit numbers, so any TTL over 136 years doesn't work
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""9999999999""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestMXGarbageMailserver()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""3600""
primary-ns=""ns.example.com"" hostmaster=""hostmaster.example.com""
refresh=""3600"" retry=""3600"" expire=""3600"" />
<MX name=""example.com"" class=""IN"" ttl=""3600"" priority=""1"" mailserver="".....example.com"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestRelayTooHighPort()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<relay address=""192.168.0.1"" port=""1000000"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestPTRMissingPointer()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""3600""
primary-ns=""ns.example.com"" hostmaster=""hostmaster.example.com""
refresh=""3600"" retry=""3600"" expire=""3600"" />
<PTR name=""1.0.168.192.in-addr.arpa"" class=""IN"" ttl=""3600"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestAIPv6Address()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""3600""
primary-ns=""ns.example.com"" hostmaster=""hostmaster.example.com""
refresh=""3600"" retry=""3600"" expire=""3600"" />
<A name=""example.com"" class=""IN"" ttl=""3600"" address=""2001:beef:cafe::1337"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestRelayGarbagePort()
{
// The smallest file that you can get away with is an empty zone, which has just an SOA
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<relay address=""192.168.0.1"" port=""blargh"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestMultipleSOAFails()
{
// Multiple SOA records are not allowed, since we currently don't support multiple zones
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<SOA name=""fabrikam.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
</zone>
" );
Assert.Throws <InvalidDataException>(() => DNSZone.Unserialize(config));
}
public void TestConfigRelay()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<relay address=""192.168.0.1"" port=""53"" />
</zone>
" );
var zone = DNSZone.Unserialize(config);
var relays = new EndPoint[] {
new IPEndPoint(IPAddress.Parse("192.168.0.1"), 53)
};
Assert.That(zone.Relays, Is.EquivalentTo(relays));
}
public void TestConfigAAAARecord()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<AAAA name=""www.example.com"" class=""IN"" ttl=""3600"" address=""2001:0DB8:AC10:FE01:0000:0000:0000:0000"" />
</zone>
" );
var zone = DNSZone.Unserialize(config);
var records = new List <DNSRecord>();
records.Add(new DNSRecord(
new Domain("www.example.com"),
AddressClass.INTERNET,
3600,
new AAAAResource(IPv6Address.Parse("2001:0DB8:AC10:FE01:0000:0000:0000:0000"))));
Assert.That(zone.Records, Is.EquivalentTo(records));
}
public void TestConfigMXRecord()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<MX name=""example.com"" class=""IN"" ttl=""3600"" priority=""42"" mailserver=""smtp.example.com"" />
</zone>
" );
var zone = DNSZone.Unserialize(config);
var records = new List <DNSRecord>();
records.Add(new DNSRecord(
new Domain("example.com"),
AddressClass.INTERNET,
3600,
new MXResource(42, new Domain("smtp.example.com"))));
Assert.That(zone.Records, Is.EquivalentTo(records));
}
public void TestConfigPTRRecordV6()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<PTR name=""b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.ip6.arpa"" class=""IN"" ttl=""3600"" pointer=""www.example.com"" />
</zone>
" );
var zone = DNSZone.Unserialize(config);
var records = new List <DNSRecord>();
records.Add(new DNSRecord(
new Domain("b.a.9.8.7.6.5.0.4.0.0.0.3.0.0.0.2.0.0.0.1.0.0.0.0.0.0.0.1.2.3.4.ip6.arpa"),
AddressClass.INTERNET,
3600,
new PTRResource(new Domain("www.example.com"))));
Assert.That(zone.Records, Is.EquivalentTo(records));
}
public void TestSOAMinTTLIsEnforced()
{
var config = ParseXML(@"
<zone>
<SOA name=""example.com"" class=""IN"" ttl=""7200""
primary-ns=""ns.example.com"" hostmaster=""admin.example.com""
serial=""0"" refresh=""3600"" retry=""60"" expire=""3600"" min-ttl=""60"" />
<A name=""www.example.com"" class=""IN"" ttl=""5"" address=""192.168.0.1"" />
</zone>
" );
var zone = DNSZone.Unserialize(config);
var records = new List <DNSRecord>();
records.Add(new DNSRecord(
new Domain("www.example.com"),
AddressClass.INTERNET,
60,
new AResource(IPv4Address.Parse("192.168.0.1"))));
Assert.That(zone.Records, Is.EquivalentTo(records));
}
