private void CloseSocket(ProxySocketTun sock)
{
lock (this)
{
if (sock != null)
{
ProxySocketTun s = sock;
try
{
s.Shutdown(SocketShutdown.Both);
}
catch { }
try
{
s.Close();
}
catch { }
}
}
}
private void Connect()
{
try
{
IPAddress ipAddress = null;
int _targetPort = 0;
{
if (_firstPacket[0] == 1)
{
byte[] addr = new byte[4];
Array.Copy(_firstPacket, 1, addr, 0, addr.Length);
ipAddress = new IPAddress(addr);
_targetPort = (_firstPacket[5] << 8) | _firstPacket[6];
_remote_host = ipAddress.ToString();
Logging.Info("Direct" + " connect " + _remote_host + ":" + _targetPort.ToString());
}
else if (_firstPacket[0] == 4)
{
byte[] addr = new byte[16];
Array.Copy(_firstPacket, 1, addr, 0, addr.Length);
ipAddress = new IPAddress(addr);
_targetPort = (_firstPacket[17] << 8) | _firstPacket[18];
_remote_host = ipAddress.ToString();
Logging.Info("Direct" + " connect " + _remote_host + ":" + _targetPort.ToString());
}
else if (_firstPacket[0] == 3)
{
int len = _firstPacket[1];
byte[] addr = new byte[len];
Array.Copy(_firstPacket, 2, addr, 0, addr.Length);
_remote_host = Encoding.UTF8.GetString(_firstPacket, 2, len);
_targetPort = (_firstPacket[len + 2] << 8) | _firstPacket[len + 3];
Logging.Info("Direct" + " connect " + _remote_host + ":" + _targetPort.ToString());
if (!IPAddress.TryParse(_remote_host, out ipAddress))
{
if (ipAddress == null)
{
ipAddress = Utils.DnsBuffer.Get(_remote_host);
}
}
if (ipAddress == null)
{
if (_remote_host.IndexOf('.') >= 0)
{
ipAddress = Utils.QueryDns(_remote_host, _config.dnsServer);
}
else
{
ipAddress = Utils.QueryDns(_remote_host, null);
}
}
if (ipAddress != null)
{
Utils.DnsBuffer.Set(_remote_host, new IPAddress(ipAddress.GetAddressBytes()));
Utils.DnsBuffer.Sweep();
}
else
{
throw new SocketException((int)SocketError.HostNotFound);
}
}
_remote_port = _targetPort;
}
// ProxyAuth recv only socks5 head, so don't need to save anything else
IPEndPoint remoteEP = new IPEndPoint(ipAddress, _targetPort);
_remote = new ProxySocketTun(ipAddress.AddressFamily,
SocketType.Stream, ProtocolType.Tcp);
_remote.GetSocket().NoDelay = true;
// Connect to the remote endpoint.
_remote.BeginConnect(remoteEP,
new AsyncCallback(ConnectCallback), null);
}
catch (Exception e)
{
Logging.LogUsefulException(e);
Close();
}
}
