public void Stop()
{
if (clientCancellationToken.CanBeCanceled)
{
clientCancellationTokenSource.Cancel();
}
if (link != null)
{
link.Close();
}
Thread.Sleep(100);
link = null;
}
public void HandlePowerEvents(object sender, PowerModeChangedEventArgs e)
{
switch (e.Mode)
{
case PowerModes.Suspend:
Running = false;
Link.Close();
Tun.Close();
break;
case PowerModes.Resume:
Tun = Tun.Reopen();
Running = true;
break;
}
}
public void ConnectLoop(string host)
{
int seconds_to_wait = 0;
while (Link == null || Link.Closed)
{
ManualResetEvent closed = new ManualResetEvent(false);
Uri uri = new Uri(host);
try
{
switch (uri.Scheme)
{
case "ws":
Log.Info("Connecting to {0} over Websocket", uri);
var spoofed_host = Config.GetString("network.websocket.spoof_host");
var spoofed_origin = Config.GetString("network.websocket.spoof_origin");
spoofed_host = string.IsNullOrWhiteSpace(spoofed_host) ? uri.Host : spoofed_host;
spoofed_origin = string.IsNullOrWhiteSpace(spoofed_origin) ? uri.Host : spoofed_origin;
Link = new ClientLink(new WebSocketTunnel(new TcpClient(uri.Host, uri.Port), spoofed_host, spoofed_origin, false));
break;
case "udp":
Log.Info("Connecting to {0} over UDP", uri);
Link = new ClientLink(new UdpTunnel(IPAddress.Parse(uri.Host), uri.Port, Config.GetInt("network.udp.force_mtu")));
break;
}
Link.OnLinkClosed += (sender) =>
{
closed.Set();
};
Link.LoadCertificatesFromFiles(
CertificateAuthority,
Certificate,
Signature);
Link.AttestationToken = Identifier.Value;
var result = Link.PerformHandshake();
if (result.Type != HandshakeResultType.Successful)
{
Log.Error("Failed handshake: {0}", result.Message);
Link = null;
throw new Exception(result.Message);
}
Link.BufferedWrite = false;
}
catch (Exception ex)
{
seconds_to_wait += 3;
Log.Error(ex, "Failed to connect, retrying in {0} seconds...", seconds_to_wait);
Log.Error(ex);
Thread.Sleep(seconds_to_wait * 1000);
continue;
}
seconds_to_wait = 0;
Utilities.StartThread(delegate
{
while (Link != null && Link.Tunnel != null && !Link.Tunnel.Closed)
{
try
{
var data = Tun.Read();
if (data == null)
{
continue;
}
if (data[0] == 0x60)
{
Log.Trace("Dropping IPv6 packet");
continue;
}
Log.Trace("Received {0} bytes", data.Length);
Link.SendData(data);
}
catch (Exception ex)
{
if (ex.Message == "A device attached to the system is not functioning.") // temp hack
{
Tun.Close();
Tun = Tun.Reopen();
}
Log.Error("Error while reading from tun. HResult: {0}", ex.HResult);
Log.Error(ex);
}
}
try
{
Link?.Close();
}
catch
{
}
closed.Set();
});
Link.OnDataReceived += (sender, data) => {
Tun.Write(data);
Log.Trace("Wrote {0} bytes", data.Length);
};
closed.WaitOne();
Thread.Sleep(5000);
}
}