public void HandleCommandResponse(ReverseProxyConnectResponse response)
{
//a small prevention for calling this method twice, not required... just incase
if (!_receivedConnResponse)
{
_receivedConnResponse = true;
if (response.IsConnected)
{
this.HostName = response.HostName;
//tell the Proxy Client that we've established a connection
if (Type == ProxyType.HTTPS)
{
SendToClient(Encoding.ASCII.GetBytes("HTTP/1.0 200 Connection established\r\n\r\n"));
}
else if (Type == ProxyType.SOCKS5)
{
//Thanks to http://www.mentalis.org/soft/projects/proxy/ for the Maths
try
{
List<byte> responsePacket = new List<byte>();
responsePacket.Add(SOCKS5_VERSION_NUMBER);
responsePacket.Add(SOCKS5_CMD_REPLY_SUCCEEDED);
responsePacket.Add(SOCKS5_RESERVED);
responsePacket.Add(1);
responsePacket.AddRange(response.LocalAddress.GetAddressBytes());
responsePacket.Add((byte)(Math.Floor((decimal)response.LocalPort / 256)));
responsePacket.Add((byte)(response.LocalPort % 256));
SendToClient(responsePacket.ToArray());
}
catch
{
//just incase the math failed
//it will still show it's succesful
SendToClient(new byte[]
{
SOCKS5_VERSION_NUMBER,
SOCKS5_CMD_REPLY_SUCCEEDED,
SOCKS5_RESERVED,
1, //static: it's always 1
0, 0, 0, 0, //bind ip
0, 0 //bind port
});
}
}
_handshakeStream.Close();
ProxySuccessful = true;
try
{
//start receiving data from the proxy
Handle.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, AsyncReceiveProxy, null);
}
catch
{
Disconnect();
}
}
else
{
if (Type == ProxyType.HTTPS)
{
Disconnect();
}
else if (Type == ProxyType.SOCKS5)
{
//send a connection fail packet
SendToClient(new byte[]
{
SOCKS5_VERSION_NUMBER,
SOCKS5_CMD_REPLY_CONNECTION_REFUSED,
SOCKS5_RESERVED,
1, //static: it's always 1
0, 0, 0, 0, //Bind Address
0, 0 //Bind Port
});
}
}
Server.CallonUpdateConnection(this);
}
}