/// <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);
}
/// <summary>
/// Writes a given packet to the client
/// </summary>
/// <param name="packet">IPacket packet</param>
/// <param name="connection"></param>
/// <returns>True on success, false on failure</returns>
public bool Respond(IPacket packet, NetworkStream connection)
{
try
{
var bytes = packet.GetBytes();
connection.Write(bytes, 0, bytes.Length);
}
catch (Exception e)
{
UDProxy.DebugException(e);
return(false);
}
return(true);
}
private static void DebugError(string msg)
{
UDProxy.Debug("UDPServer", msg, UDProxy.DebugLevels.Error);
}
private static void DebugWarn(string msg)
{
UDProxy.Debug("UDPServer", msg, UDProxy.DebugLevels.Warn);
}
private static void DebugInfo(string msg)
{
UDProxy.Debug("UDPServer", msg, UDProxy.DebugLevels.Info);
}
public static void DebugError(string msg)
{
UDProxy.Debug("SOCKS5", msg, UDProxy.DebugLevels.Error);
}
public static void DebugWarn(string msg)
{
UDProxy.Debug("SOCKS5", msg, UDProxy.DebugLevels.Warn);
}
public static void DebugInfo(string msg)
{
UDProxy.Debug("SOCKS5", msg, UDProxy.DebugLevels.Info);
}
