/// <summary>
/// Processes bytes received from client
/// </summary>
/// <param name="bytes">Bytes to process and react to.</param>
/// <returns>Returns true on success, false on failure (with error in Error property)</returns>
public bool Process(MemoryStream stream, NetworkStream connection)
{
if (State == SOCKS5States.Disconnected)
{
// SOCKS5 HANDSHAKE
var packet = new SOCKS5.PacketHandshake(stream);
if (packet.METHODS != 0x0)
throw new UDProxyException("Authentication is not yet supported!", new NotImplementedException());
UDProxy.DebugInfo("SOCKS5", "Responding to handshake request");
if ( Respond(new PacketReplyHandshake(), connection) )
{
State = SOCKS5States.Connected;
return true;
}
}
else if (State == SOCKS5States.Connected)
{
// SOCKS5 Connection Requests
// We're connected, so we're dealing with requests
var packet = new SOCKS5.PacketRequest(stream);
PacketReplyRequest reply = new PacketReplyRequest(packet);
// Set our client's remote endpoint expected port to the one it's given us
// Weird type casting is nessecary for safe translation
MyClient.Port = (int)BitConverter.ToUInt16(packet.PORT, 0);
// It's not ok :(
if (reply.REP != SOCKS5Protocol.REP.OK)
{
Respond(reply, connection);
return false;
}
switch (packet.CMD)
{
case SOCKS5Protocol.CMD.BIND:
throw new UDProxyException("CMD BIND not yet supported!");
case SOCKS5Protocol.CMD.CONNECT:
throw new UDProxyException("CMD CONNECT not yet supported!");
case SOCKS5Protocol.CMD.UDP_ASSOC:
UDPConnection.TryBegin(ref reply, MyClient);
Respond(reply, connection);
break;
}
}
else
{
throw new UDProxyException("Unknown error (unimplemented function?)");
}
return false;
}
public static void TryBegin(ref PacketReplyRequest reply, IPEndPoint client)
{
// Housekeeping
if (MyThread != null)
{
MyThread.Abort();
}
if (MyUDP != null)
{
MyUDP.Close();
}
TotalUp = 0;
TotalDown = 0;
try
{
// Set our client's expected IP and Port from SOCKS5
MyClient = client;
if (MyClient.Port == 0)
{
DebugWarn("Client's port is 0, going to have to guess source port (normal with V2/V3 viewers).");
hasClientPort = false;
}
// Get target's IP and ports from config (less lag)
ExternalIP = (IPAddress)UDProxy.gConfiguration.Config["MyExternalIP"];
TargetIP = (IPAddress)UDProxy.gConfiguration.Config["TargetIP"];
TargetPorts = (List <ushort>)UDProxy.gConfiguration.Config["TargetPorts"];
MyUDP = new UdpClient((ushort)UDProxy.gConfiguration.Config["ListenPort"]);
MyUDP.AllowNatTraversal(false);
MyUDP.DontFragment = true;
MyUDP.EnableBroadcast = true;
MyThread = new Thread(new ThreadStart(StreamLoop));
}
catch (SocketException e)
{
reply.REP = SOCKS5Protocol.REP.GENERAL_FAILURE;
throw new UDProxyException("Socket failure: " + e.Message);
}
DebugInfo("UDP Endpoint has been set up.");
MyThread.Start();
}
public static void TryBegin(ref PacketReplyRequest reply, IPEndPoint client)
{
// Housekeeping
if (MyThread != null)
MyThread.Abort();
if (MyUDP != null)
MyUDP.Close();
TotalUp = 0;
TotalDown = 0;
try
{
// Set our client's expected IP and Port from SOCKS5
MyClient = client;
if (MyClient.Port == 0)
{
DebugWarn("Client's port is 0, going to have to guess source port (normal with V2/V3 viewers).");
hasClientPort = false;
}
// Get target's IP and ports from config (less lag)
ExternalIP = (IPAddress)UDProxy.gConfiguration.Config["MyExternalIP"];
TargetIP = (IPAddress)UDProxy.gConfiguration.Config["TargetIP"];
TargetPorts = (List<ushort>)UDProxy.gConfiguration.Config["TargetPorts"];
MyUDP = new UdpClient( (ushort)UDProxy.gConfiguration.Config["ListenPort"] );
MyUDP.AllowNatTraversal(false);
MyUDP.DontFragment = true;
MyUDP.EnableBroadcast = true;
MyThread = new Thread(new ThreadStart(StreamLoop));
}
catch (SocketException e)
{
reply.REP = SOCKS5Protocol.REP.GENERAL_FAILURE;
throw new UDProxyException("Socket failure: " + e.Message);
}
DebugInfo("UDP Endpoint has been set up.");
MyThread.Start();
}
