public static int ProxyTCP(ProxyRequest pr)
{
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try {
sock.Connect(pr.Target);
} catch (SocketException ex) {
#if DEBUG
Console.WriteLine(ex);
#endif
pr.NetStream.Close();
return 1;
}
bool Lock = true;
Thread inco = new Thread(() => passthrough(pr.NetStream, sock, ref Lock));
Thread outg = new Thread(() => passthrough(sock, pr.NetStream, ref Lock));
inco.Start();
outg.Start();
while (true)
{
if (!Lock)
{
inco.Abort();
outg.Abort();
pr.NetStream.Close();
sock.Close();
break;
}
Thread.Sleep(10);
}
return 0;
}
private void ProcessConnection(Func<ProxyRequest, int> processTCPRequest, Func<string, bool> processAuthentication, Socket sock)
{
byte[] verinfo = new byte[2];
sock.Receive(verinfo);
if (verinfo[0] != 0x04)
{
sock.Close();
return;
}
if (verinfo[1] != 0x01)
{
//Only support streams, not opening ports.
sock.Close();
return;
}
byte[] portip = new byte[6];
byte[] bport = new byte[2];
byte[] bip = new byte[4];
sock.Receive(portip);
Array.Copy(portip, bport, 2);
Array.Copy(portip, 2, bip, 0, 4);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(bport);
//Array.Reverse(bip);
}
int port = Convert.ToInt32(BitConverter.ToUInt16(bport, 0));
IPAddress ip = new IPAddress((long)BitConverter.ToUInt32(bip, 0));
List<byte> userid = new List<byte>();
while ((userid.Count == 0) || (userid[userid.Count - 1] != 0x00))
{
byte[] temp = new byte[1];
sock.Receive(temp);
userid.Add(temp[0]);
}
if (BitConverter.IsLittleEndian)
userid.Reverse();
string user = System.Text.ASCIIEncoding.ASCII.GetString(userid.ToArray());
ProxyRequest pr = new ProxyRequest(user, ip, port, sock);
//Begin validation and reply
bool reject = false;
byte[] message = new byte[8];
message[0] = 0x00;
if (processAuthentication.Invoke(user))
message[1] = 0x5a;
else
{
message[1] = 0x5b;
reject = true;
}
//Why do we have to add gibberish that is ignored
System.Text.ASCIIEncoding.ASCII.GetBytes("P0NIES").CopyTo(message, 2);
sock.Send(message);
#if DEBUG
Console.WriteLine("New tunnel!");
Console.Write("\nPort/IP: ");
foreach (byte b in portip)
{
Console.Write(b);
Console.Write(" ");
}
Console.WriteLine();
Console.WriteLine(port);
Console.WriteLine(BitConverter.ToUInt32(portip, 2));
Console.WriteLine(verinfo.Length + portip.Length);
Console.WriteLine(reject);
Console.Out.Flush();
#endif
if (reject)
sock.Close();
else
processTCPRequest.Invoke(pr);
}
