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| namespace Socks5
{
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
internal class Socks5Class
{
private byte[] byte_0 = new byte[0x400];
private Socket InSocket;
private int int_0;
private Socket OutSocket;
public Socks5Class(Socket socket_2)
{
this.InSocket = socket_2;
}
private void AuthSocks5(byte[] AuthData, int AuthProgress)
{
IPAddress address;
ushort num3;
switch (this.int_0)
{
case 0:
{
byte num = AuthData[0];
byte num2 = AuthData[2];
if (num == 5)
{
if (num2 != 0)
{
num2 = 0xff;
}
this.InSocket.BeginSend(new byte[] { num, num2 }, 0, 2, SocketFlags.None, new AsyncCallback(this.RedictData4), this.InSocket);
this.int_0++;
return;
}
this.CloseSocks5();
return;
}
case 1:
{
address = null;
num3 = 0;
byte num5 = this.byte_0[1];
if (num5 == 1)
{
switch (this.byte_0[3])
{
case 1:
address = IPAddress.Parse(AuthData[4].ToString() + <PrivateImplementationDetails>{15439A59-21B6-4268-85FC-B75D4C80FFCA}.smethod_1() + AuthData[5].ToString() + <PrivateImplementationDetails>{15439A59-21B6-4268-85FC-B75D4C80FFCA}.smethod_1() + AuthData[6].ToString() + <PrivateImplementationDetails>{15439A59-21B6-4268-85FC-B75D4C80FFCA}.smethod_1() + AuthData[7].ToString());
num3 = (ushort) ((AuthData[8] * 0x100) + AuthData[9]);
break;
case 3:
address = Dns.GetHostAddresses(Encoding.Default.GetString(AuthData, 5, AuthData[4]))[0];
num3 = (ushort) (AuthData[4] + 5);
num3 = (ushort) ((AuthData[num3] * 0x100) + AuthData[num3 + 1]);
break;
}
}
break;
}
case 2:
this.OutSocket.BeginSend(AuthData, 0, AuthProgress, SocketFlags.None, new AsyncCallback(this.RedictData4), this.OutSocket);
return;
default:
return;
}
this.OutSocket = new Socket(address.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
this.OutSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);
this.OutSocket.BeginConnect(new IPEndPoint(address, num3), new AsyncCallback(this.RedictData3), this.OutSocket).AsyncWaitHandle.WaitOne();
if (this.OutSocket.Connected)
{
AuthData[1] = 0;
}
else
{
AuthData[1] = 4;
}
this.InSocket.BeginSend(AuthData, 0, AuthProgress, SocketFlags.None, new AsyncCallback(this.RedictData4), this.InSocket);
this.int_0++;
}
private void CloseSocks5()
{
try
{
this.OutSocket.Disconnect(false);
this.InSocket.Disconnect(false);
this.OutSocket.Close();
this.InSocket.Close();
}
catch
{
}
}
public void RecieveSocks5()
{
this.InSocket.BeginReceive(this.byte_0, 0, this.byte_0.Length, SocketFlags.None, new AsyncCallback(this.RedictData), this.InSocket);
}
private void RedictData(IAsyncResult iasyncResult_0)
{
try
{
int authProgress = ((Socket) iasyncResult_0.AsyncState).EndReceive(iasyncResult_0);
if (authProgress > 0)
{
this.AuthSocks5(this.byte_0, authProgress);
((Socket) iasyncResult_0.AsyncState).BeginReceive(this.byte_0, 0, this.byte_0.Length, SocketFlags.None, new AsyncCallback(this.RedictData), (Socket) iasyncResult_0.AsyncState);
}
else
{
this.CloseSocks5();
}
}
catch
{
}
}
private void RedictData2(IAsyncResult iasyncResult_0)
{
try
{
int size = ((Socket) iasyncResult_0.AsyncState).EndReceive(iasyncResult_0);
if (size > 0)
{
this.InSocket.BeginSend(this.byte_0, 0, size, SocketFlags.None, new AsyncCallback(this.RedictData4), this.InSocket);
((Socket) iasyncResult_0.AsyncState).BeginReceive(this.byte_0, 0, this.byte_0.Length, SocketFlags.None, new AsyncCallback(this.RedictData2), (Socket) iasyncResult_0.AsyncState);
}
else
{
this.CloseSocks5();
}
}
catch
{
}
}
private void RedictData3(IAsyncResult iasyncResult_0)
{
try
{
((Socket) iasyncResult_0.AsyncState).EndConnect(iasyncResult_0);
((Socket) iasyncResult_0.AsyncState).BeginReceive(this.byte_0, 0, this.byte_0.Length, SocketFlags.None, new AsyncCallback(this.RedictData2), (Socket) iasyncResult_0.AsyncState);
}
catch
{
}
}
private void RedictData4(IAsyncResult iasyncResult_0)
{
try
{
((Socket) iasyncResult_0.AsyncState).EndSend(iasyncResult_0);
}
catch
{
}
}
}
} |
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