public void PutResponseToBufferTestMethod()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
STUNMessage stunResponse = new STUNMessage(STUNMessageTypesEnum.BindingSuccessResponse);
stunResponse.Header.TransactionId = Guid.NewGuid().ToByteArray().Take(12).ToArray();
//stunResponse.AddFingerPrintAttribute();
stunResponse.AddXORMappedAddressAttribute(IPAddress.Parse("127.0.0.1"), 1234);
byte[] buffer = stunResponse.ToByteBuffer(null, true);
}
public void GenerateHmacAndFingerprintTestMethod()
{
logger.LogDebug("--> " + System.Reflection.MethodBase.GetCurrentMethod().Name);
logger.BeginScope(System.Reflection.MethodBase.GetCurrentMethod().Name);
string icePassword = "******";
STUNMessage msg = new STUNMessage(STUNMessageTypesEnum.BindingSuccessResponse);
msg.Header.TransactionId = new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
msg.AddXORMappedAddressAttribute(IPAddress.Loopback, 55477);
var buffer = msg.ToByteBufferStringKey(icePassword, true);
string hmac = "HMAC: ";
for (int i = 36; i < 56; i++)
{
hmac += $"{buffer[i]:X2} ";
}
logger.LogDebug(hmac);
logger.LogDebug($"Fingerprint: {buffer[buffer.Length - 4]:X2} {buffer[buffer.Length - 3]:X2} {buffer[buffer.Length - 2]:X2} {buffer[buffer.Length - 1]:X2}.");
}
private void OnPacketReceived(UdpReceiver receiver, int localPort, IPEndPoint remoteEndPoint, byte[] packet)
{
STUNMessage stunMessage = STUNMessage.ParseSTUNMessage(packet, packet.Length);
switch (stunMessage.Header.MessageType)
{
case STUNMessageTypesEnum.Allocate:
logger.LogDebug($"MockTurnServer received Allocate request from {remoteEndPoint}.");
if (_relaySocket == null)
{
_clientEndPoint = remoteEndPoint;
// Create a new relay socket.
NetServices.CreateRtpSocket(false, _listenAddress, 0, out _relaySocket, out _);
_relayEndPoint = _relaySocket.LocalEndPoint as IPEndPoint;
logger.LogDebug($"MockTurnServer created relay socket on {_relayEndPoint}.");
_relayListener = new UdpReceiver(_relaySocket);
_relayListener.OnPacketReceived += OnRelayPacketReceived;
_relayListener.OnClosed += (reason) => logger.LogDebug($"MockTurnServer relay on {_relayEndPoint} closed.");
_relayListener.BeginReceiveFrom();
}
STUNMessage allocateResponse = new STUNMessage(STUNMessageTypesEnum.AllocateSuccessResponse);
allocateResponse.Header.TransactionId = stunMessage.Header.TransactionId;
allocateResponse.AddXORMappedAddressAttribute(remoteEndPoint.Address, remoteEndPoint.Port);
allocateResponse.AddXORAddressAttribute(STUNAttributeTypesEnum.XORRelayedAddress, _relayEndPoint.Address, _relayEndPoint.Port);
_clientSocket.SendTo(allocateResponse.ToByteBuffer(null, false), remoteEndPoint);
break;
case STUNMessageTypesEnum.BindingRequest:
logger.LogDebug($"MockTurnServer received Binding request from {remoteEndPoint}.");
STUNMessage stunResponse = new STUNMessage(STUNMessageTypesEnum.BindingSuccessResponse);
stunResponse.Header.TransactionId = stunMessage.Header.TransactionId;
stunResponse.AddXORMappedAddressAttribute(remoteEndPoint.Address, remoteEndPoint.Port);
_clientSocket.SendTo(stunResponse.ToByteBuffer(null, false), remoteEndPoint);
break;
case STUNMessageTypesEnum.CreatePermission:
logger.LogDebug($"MockTurnServer received CreatePermission request from {remoteEndPoint}.");
STUNMessage permResponse = new STUNMessage(STUNMessageTypesEnum.CreatePermissionSuccessResponse);
permResponse.Header.TransactionId = stunMessage.Header.TransactionId;
_clientSocket.SendTo(permResponse.ToByteBuffer(null, false), remoteEndPoint);
break;
case STUNMessageTypesEnum.SendIndication:
logger.LogDebug($"MockTurnServer received SendIndication request from {remoteEndPoint}.");
var buffer = stunMessage.Attributes.Single(x => x.AttributeType == STUNAttributeTypesEnum.Data).Value;
var destEP = (stunMessage.Attributes.Single(x => x.AttributeType == STUNAttributeTypesEnum.XORPeerAddress) as STUNXORAddressAttribute).GetIPEndPoint();
logger.LogDebug($"MockTurnServer relaying {buffer.Length} bytes to {destEP}.");
_relaySocket.SendTo(buffer, destEP);
break;
default:
logger.LogDebug($"MockTurnServer received unknown STUN message from {remoteEndPoint}.");
break;
}
}