private void CloseSocket(ProxySocketTun sock)
{
lock (this)
{
if (sock != null)
{
var s = sock;
try
{
s.Shutdown(SocketShutdown.Both);
}
catch
{
// ignored
}
try
{
s.Close();
}
catch
{
// ignored
}
}
}
}
private void d()
{
try
{
IPAddress iPAddress = null;
int port = 0;
if (this.b[0] == 1)
{
byte[] array = new byte[4];
Array.Copy(this.b, 1, array, 0, array.Length);
iPAddress = new IPAddress(array);
port = ((int)this.b[5] << 8 | (int)this.b[6]);
this.h = iPAddress.ToString();
}
else if (this.b[0] == 4)
{
byte[] array2 = new byte[16];
Array.Copy(this.b, 1, array2, 0, array2.Length);
iPAddress = new IPAddress(array2);
port = ((int)this.b[17] << 8 | (int)this.b[18]);
this.h = iPAddress.ToString();
}
else if (this.b[0] == 3)
{
int num = (int)this.b[1];
byte[] array3 = new byte[num];
Array.Copy(this.b, 2, array3, 0, array3.Length);
this.h = Encoding.UTF8.GetString(this.b, 2, num);
port = ((int)this.b[num + 2] << 8 | (int)this.b[num + 3]);
if (!IPAddress.TryParse(this.h, out iPAddress) && iPAddress == null)
{
iPAddress = global::a.d().Get(this.h);
}
if (iPAddress == null)
{
iPAddress = global::a.a(this.h, null, false);
}
if (iPAddress != null)
{
global::a.d().Set(this.h, new IPAddress(iPAddress.GetAddressBytes()));
global::a.d().Sweep();
}
else if (!this.g)
{
throw new SocketException(11001);
}
}
this.i = port;
IPEndPoint ep = new IPEndPoint(iPAddress, port);
this.e = new ProxySocketTun(iPAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
this.e.GetSocket().NoDelay = true;
this.e.BeginConnect(ep, new AsyncCallback(this.c), null);
}
catch (Exception arg_1D1_0)
{
Logging.LogUsefulException(arg_1D1_0);
this.e();
}
}
private void a(ProxySocketTun A_0)
{
lock (this)
{
if (A_0 != null)
{
try
{
A_0.Shutdown(SocketShutdown.Both);
}
catch
{
}
try
{
A_0.Close();
}
catch
{
}
}
}
}
private void Connect()
{
try
{
IPAddress ipAddress = null;
var _targetPort = 0;
{
if (_firstPacket[0] == 1)
{
var 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((_local_proxy ? "Local proxy" : "Direct") + " connect " + _remote_host + ":" + _targetPort);
}
else if (_firstPacket[0] == 4)
{
var 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((_local_proxy ? "Local proxy" : "Direct") + " connect " + _remote_host + ":" + _targetPort);
}
else if (_firstPacket[0] == 3)
{
int len = _firstPacket[1];
var 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((_local_proxy ? "Local proxy" : "Direct") + " connect " + _remote_host + ":" + _targetPort);
//if (!_local_proxy)
{
if (!IPAddress.TryParse(_remote_host, out ipAddress))
{
if (_config.proxyRuleMode == ProxyRuleMode.UserCustom)
{
var hostMap = HostMap.Instance();
if (hostMap.GetHost(_remote_host, out var host_addr))
{
if (!string.IsNullOrEmpty(host_addr))
{
var lower_host_addr = host_addr.ToLower();
if (lower_host_addr.StartsWith("reject"))
{
Close();
return;
}
if (lower_host_addr.IndexOf('.') >= 0 || lower_host_addr.IndexOf(':') >= 0)
{
if (!IPAddress.TryParse(lower_host_addr, out ipAddress))
{
//
}
}
}
}
}
if (ipAddress == null)
{
ipAddress = DnsUtil.LocalDnsBuffer.Get(_remote_host);
}
}
if (ipAddress == null)
{
ipAddress = DnsUtil.QueryDns(_remote_host, _remote_host.IndexOf('.') >= 0 ? _config.localDnsServer : null);
}
if (ipAddress != null)
{
DnsUtil.LocalDnsBuffer.Set(_remote_host, new IPAddress(ipAddress.GetAddressBytes()));
DnsUtil.LocalDnsBuffer.Sweep();
}
else
{
if (!_local_proxy)
{
throw new SocketException((int)SocketError.HostNotFound);
}
}
}
}
_remote_port = _targetPort;
}
if (ipAddress != null && _config.proxyRuleMode == ProxyRuleMode.UserCustom)
{
var hostMap = HostMap.Instance();
if (hostMap.GetIP(ipAddress, out var host_addr))
{
var lower_host_addr = host_addr.ToLower();
if (lower_host_addr.StartsWith("reject")
)
{
Close();
return;
}
}
}
if (_local_proxy)
{
IPAddress.TryParse(_config.proxyHost, out ipAddress);
_targetPort = _config.proxyPort;
}
// ProxyAuth recv only socks5 head, so don't need to save anything else
var remoteEP = new IPEndPoint(ipAddress ?? throw new InvalidOperationException(), _targetPort);
_remote = new ProxySocketTun(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
_remote.GetSocket().NoDelay = true;
// Connect to the remote endpoint.
_remote.BeginConnect(remoteEP, ConnectCallback, null);
}
catch (Exception e)
{
Logging.LogUsefulException(e);
Close();
}
}
