public void GetIpV4BytesTest()
{
AddressAttribute target = new MappedAddress()
{
IpAddress = IPAddress.Loopback,
Port = 0x1234,
};
byte[] expected = new byte[]
{
0xee, 0xee, 0xee, 0xee,
0x00, 0x01, 0x00, 0x08,
0x00, 0x01, 0x12, 0x34,
0x7f, 0x00, 0x00, 0x01,
};
byte[] actual = new byte[]
{
0xee, 0xee, 0xee, 0xee,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
};
int startIndex = 4;
target.GetBytes(actual, ref startIndex);
Assert.AreEqual(16, startIndex);
Helpers.AreArrayEqual(expected, actual);
Assert.AreEqual(AddressFamily.InterNetwork, target.IpEndPoint.AddressFamily);
}
public void ParseIp4Test()
{
byte[] bytes = new byte[]
{
0x00, 0x01, 0x00, 0x08,
0xff, 0x01, 0x12, 0x34,
0x01, 0x02, 0x03, 0x04,
};
int startIndex = 0;
AddressAttribute target = new MappedAddress();
target.Parse(bytes, ref startIndex);
Assert.AreEqual(12, startIndex);
Assert.AreEqual(AttributeType.MappedAddress, target.AttributeType);
Assert.AreEqual(0x1234, target.Port);
Assert.AreEqual(@"1.2.3.4", target.IpAddress.ToString());
}
/// <summary>
/// Helper method using UDP or TCP that returns needed informations to begin peer-to-peer Punch Hole operations
/// using an existing IPEndPoint
/// </summary>
/// <param name="hostEP">The IPEndPoint to which the socket will be bound to</param>
/// <param name="serverEP">The IP Address of the STUN server</param>
/// <param name="type">The connection type used to do the STUN Binding Request</param>
/// <returns>
/// A key-value pair where :
/// * the key is the local IPEndPoint from where the STUN request occurs
/// * the value is the MappedAddress IPEndPoint returned by the STUN server
/// </returns>
public static KeyValuePair <IPEndPoint, IPEndPoint> GetMappedAddressFrom(IPEndPoint hostEP, IPEndPoint serverEP, ProtocolType type)
{
StunMessage msg = new StunMessage(StunMethodType.Binding, StunMethodClass.Request, StunUtilities.NewTransactionId);
StunClient cli = new StunClient(hostEP, serverEP, type, null, null);
cli.Connect();
StunMessage resp = cli.SendMessage(msg);
if (hostEP == null)
{
hostEP = cli.HostEP;
}
MappedAddress mappedAddress = resp.MappedAddress;
cli.Disconnect();
return(new KeyValuePair <IPEndPoint, IPEndPoint>(hostEP, mappedAddress.EndPoint));
}
/// <summary>
/// Helper method using TLS over TCP that returns needed informations to begin peer-to-peer Punch Hole operations
/// using an existing IPEndPoint
/// </summary>
/// <param name="hostEP">The IPEndPoint to which the socket will be bound to</param>
/// <param name="serverEP">The IP Address of the STUN server</param>
/// <param name="remoteCertificateValidationHandler">The callback handler which validate STUN Server TLS certificate</param>
/// <param name="clientCertificate">
/// Client certificate used for mutual authentication. This certificate must be in PKCS #12 format and must contains its private key
/// The simpler way to create a certificate of this type is to follow this makecert tutorial http://www.inventec.ch/chdh/notes/14.htm.
/// Once your certificate is created : launch "mmc", CTRL+M, select "Certificates", add, choose "Local machine".
/// Find your certificate under "Personal", it must have a little key in its icon, right click on it, choose "All tasks > Export...".
/// Check the "Export key" checkbox, finish the process and then you have a valid X509Certificate2 with its private key in it
/// </param>
/// <returns>
/// A key-value pair where :
/// * the key is the local IPEndPoint from where the STUN request occurs
/// * the value is the MappedAddress IPEndPoint returned by the STUN server
/// </returns>
public static KeyValuePair <IPEndPoint, IPEndPoint> GetMappedAddressFrom(IPEndPoint hostEP, IPEndPoint serverEP, RemoteCertificateValidationCallback remoteCertificateValidationHandler, X509Certificate2 clientCertificate)
{
StunMessage msg = new StunMessage(StunMethodType.Binding, StunMethodClass.Request, StunUtilities.NewTransactionId);
StunClient cli = new StunClient(hostEP, serverEP, ProtocolType.Tcp, clientCertificate, remoteCertificateValidationHandler);
cli.Connect();
StunMessage resp = cli.SendMessage(msg);
if (hostEP == null)
{
hostEP = cli.HostEP;
}
MappedAddress mappedAddress = resp.MappedAddress;
cli.Disconnect();
return(new KeyValuePair <IPEndPoint, IPEndPoint>(hostEP, mappedAddress.EndPoint));
}
public void ParseIp6Test()
{
byte[] bytes = new byte[]
{
0x00, 0x01, 0x00, 20,
0x00, 0x02, 0x12, 0x34,
0x11, 0x22, 0x33, 0x44,
0x55, 0x66, 0x77, 0x88,
0x99, 0xaa, 0xbb, 0xcc,
0xdd, 0xee, 0xff, 0xf2,
};
int startIndex = 0;
AddressAttribute target = new MappedAddress();
target.Parse(bytes, ref startIndex);
Assert.AreEqual(24, startIndex);
Assert.AreEqual(AttributeType.MappedAddress, target.AttributeType);
Assert.AreEqual(0x1234, target.Port);
Assert.AreEqual(@"1122:3344:5566:7788:99aa:bbcc:ddee:fff2", target.IpAddress.ToString());
}
public void GetIpV6BytesTest()
{
AddressAttribute target = new MappedAddress()
{
IpAddress = IPAddress.Parse("0102:0304:0506:0708:090a:0b0c:0d0e:0f10"),
Port = 0x1234,
};
byte[] expected = new byte[]
{
0xee, 0xee, 0xee, 0xee,
0x00, 0x01, 0x00, 20,
0x00, 0x02, 0x12, 0x34,
0x01, 0x02, 0x03, 0x04,
0x05, 0x06, 0x07, 0x08,
0x09, 0x0a, 0x0b, 0x0c,
0x0d, 0x0e, 0x0f, 0x10,
};
byte[] actual = new byte[]
{
0xee, 0xee, 0xee, 0xee,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
};
int startIndex = 4;
target.GetBytes(actual, ref startIndex);
Assert.AreEqual(28, startIndex);
Helpers.AreArrayEqual(expected, actual);
Assert.AreEqual(AddressFamily.InterNetworkV6, target.IpEndPoint.AddressFamily);
}