public void TestUnserializeSOAResource()
{
var stream = DNSInput(new byte[]
{
3, 100, 110, 115,
7, 101, 120, 97, 109, 112, 108, 101,
3, 99, 111, 109,
0,
10, 104, 111, 115, 116, 109, 97, 115, 116, 101, 114,
192, 4,
0, 0, 0, 42,
0, 9, 58, 128,
0, 0, 14, 16,
0, 9, 58, 128,
0, 1, 81, 128
});
var resource = SOAResource.Unserialize(stream, 4);
UInt32 one_hour = 60 * 60;
UInt32 one_day = one_hour * 24;
UInt32 one_week = one_day * 7;
var expected = new SOAResource(
new Domain("dns.example.com"),
new Domain("hostmaster.example.com"),
42,
one_week,
one_hour,
one_week,
one_day);
Assert.That(resource, Is.EqualTo(expected));
}
/**
* Decodes the raw bytes of a DNS resource record into an
* object.
*/
public static DNSRecord Unserialize(DNSInputStream stream)
{
var name = stream.ReadDomain();
var record_type = (ResourceRecordType)stream.ReadUInt16();
var class_type = (AddressClass)stream.ReadUInt16();
var ttl = stream.ReadUInt32();
var record_size = stream.ReadUInt16();
IDNSResource resource = null;
switch (record_type.Normalize())
{
case ResourceRecordType.HOST_ADDRESS:
resource = AResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.NAME_SERVER:
resource = NSResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.START_OF_AUTHORITY:
resource = SOAResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.CANONICAL_NAME:
resource = CNAMEResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.MAIL_EXCHANGE:
resource = MXResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.POINTER:
resource = PTRResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.HOST_6ADDRESS:
resource = AAAAResource.Unserialize(stream, record_size);
break;
case ResourceRecordType.UNSUPPORTED:
// Advance the byte counter - even if we can't parse it,
// we have to properly ignore it
stream.ReadBytes(record_size);
resource = null;
break;
}
return(new DNSRecord(name, class_type.Normalize(), ttl, resource));
}
public void TestSerializeSOAResource()
{
UInt32 one_hour = 60 * 60;
UInt32 one_day = one_hour * 24;
UInt32 one_week = one_day * 7;
Tuple <MemoryStream, DNSOutputStream> out_info = DNSOutput();
var record = new SOAResource(
new Domain("dns.example.com"),
new Domain("hostmaster.example.com"),
42,
one_week,
one_hour,
one_week,
one_day);
record.Serialize(out_info.Item2);
var record_bytes = out_info.Item1.ToArray();
var expected = new byte[]
{
3, // Length of dns
100,
110,
115,
7, // Length of example
101,
120,
97,
109,
112,
108,
101,
3, // Length of com
99,
111,
109,
0,
10, // Length of hostmaster
104,
111,
115,
116,
109,
97,
115,
116,
101,
114,
// Reference to byte 4, 'example.com'
192,
4,
// Big-endian 42
0,
0,
0,
42,
// Big-endian 604,800
0,
9,
58,
128,
// Big-endian 3,600
0,
0,
14,
16,
// Big-endian 604,800
0,
9,
58,
128,
// Big-endian 86,400
0,
1,
81,
128
};
Assert.That(record_bytes, Is.EqualTo(expected));
}