earthquake / universaldvc Goto Github PK

UniversalDVC connects successfully with Windows Remote Control Connection.
But I can't connect it by using a windows form Remote Desktop ActiveX control.

I follow this instruction to connect to Virtual Channel plugin:
https://docs.microsoft.com/en-us/windows/win32/termserv/using-the-remote-desktop-activex-control-with-virtual-channels
What am I missing?
Please help me to verify it.

            strMachineName = "XXX.XXX.XXX.XXX";
            strUsername = username;
            strPassword = password;

            RemoteControlClientForm form = new RemoteControlClientForm();
            AxMsRdpClient9NotSafeForScripting remoteDesktopClient = form.Controls[0] as AxMsRdpClient9NotSafeForScripting;
            form.Show();

            remoteDesktopClient.DesktopHeight = Screen.PrimaryScreen.Bounds.Height;
            remoteDesktopClient.DesktopWidth = Screen.PrimaryScreen.Bounds.Width;
            remoteDesktopClient.FullScreen = true;

            remoteDesktopClient.Server = strMachineName;
            remoteDesktopClient.UserName = strUsername;
            remoteDesktopClient.AdvancedSettings8.ClearTextPassword = strPassword;
            remoteDesktopClient.AdvancedSettings3.ConnectToServerConsole = true;
            remoteDesktopClient.AdvancedSettings8.ConnectToAdministerServer = true;
            remoteDesktopClient.AdvancedSettings9.AuthenticationLevel = 2;
            remoteDesktopClient.AdvancedSettings8.EnableAutoReconnect = true;
            remoteDesktopClient.AdvancedSettings8.RedirectDrives = true;
            remoteDesktopClient.AdvancedSettings8.GrabFocusOnConnect = true;
            remoteDesktopClient.AdvancedSettings8.DisplayConnectionBar = true;
            remoteDesktopClient.AdvancedSettings8.EnableWindowsKey = 1;
            remoteDesktopClient.AdvancedSettings8.DisableCtrlAltDel = 1;
            remoteDesktopClient.AdvancedSettings8.allowBackgroundInput = 1;
            remoteDesktopClient.AdvancedSettings8.AcceleratorPassthrough = 1;
            remoteDesktopClient.AdvancedSettings8.BitmapPeristence = 1;
            remoteDesktopClient.AdvancedSettings8.Compress = 1;
            remoteDesktopClient.AdvancedSettings8.DoubleClickDetect = 1;
            remoteDesktopClient.AdvancedSettings7.EnableCredSspSupport = true;
            remoteDesktopClient.AdvancedSettings2.PerformanceFlags |= 0x00000080; //TS_PERF_ENABLE_FONT_SMOOTHING;
            remoteDesktopClient.AdvancedSettings9.PluginDlls = "UDVC-Plugin.dll"; // Nothing happen with this code
            remoteDesktopClient.Connect();

On the server side when initiating -s, I get as far as ...

[] Setting up server socket
[] Listening on: 127.0.0.1:31337

but it goers no further. Client side I am somewhat confused whether it should be listening or trying to connect..the default client condition is mode 0 listen (?) yet if both are listening no one is connecting? Either way the server goes no further than as you see above. What am I doing wrong?

thanks...

UDVC-Server.x64.exe
Universal Dynamic Virtual Channel server application

[] Setting up server socket
[] Listening on: 127.0.0.1:31337
[+] Client connected
[] Starting thread RsWc
[] Starting thread RcWs
[*] Waiting for threads to exit...
[-] [RsWc] recv() failed with error 0, exiting thread...

Hey man,

I tried to send a string via c# sockets (Type= Stream, TCP). This works excatly one time, and afterwards your app is shutting down, after a few seconds even the mstsc crashes.
I could not find any Information in your Documentation about what Type of Data I can send through the DVC. I use the Client in Listening mode too.

looking forward to your reply!

Hi, @earthquake.

Thank you for your great efforts on this, really appreciate it!

I am facing a problem with running the UDVC server application on Windows Server 2019 Datacenter x64.
[-] Could not open Dynamic Virtual Channel: -1073741822

The error code is strange and I did not manage to find the root of the problem.
I spent the whole day googling the problem and trying to change some configurations, but without success.

So I am kindly curious, will you have some time to look into this issue and help?

Thank you very much.

This doesn't appear to work with win2008r2/win7 on the terminal server side when trying to reach SMB, win2012r2 works fine for the same thing though. I get the following error on the server exe side in client mode (-c) using the pre-compiled x64 exe, when trying to connect to SMB (tcp 445):

[-] [RsWc] WriteFile()/WaitForSingleObject() error: 998

I didn't have the same issue when forwarding to a web server on port 80, that worked fine. However I get this with SMB on the 2 separate machines I've test using win7 and 2008r2.

"_Visual Studio Remote Debugging UDVC-Server.x64.exe" -c -p 4018
Universal Dynamic Virtual Channel server application

[] Setting up client socket
[] Connected to: 127.0.0.1:4018
[] Starting thread RsWc
[] Starting thread RcWs
[*] Waiting for threads to exit...
[-] [RsWc] WriteFile()/WaitForSingleObject() error: 998
[-] [RsWc] send() failed with error 10054

error 998 happens a few seconds after starting.
error 10054 happens upon the first connect attempt.

UDVC-Server.x64 running on Windows Server 2012 R2 Standard
Addin on Windows 10 x64
(Software versions from the pre-built Releases here, and renamed with "_Visual Studio Remote Debugging" prefix.)