Hinzufügen der Möglichkeit ein Programmstart auf dem Client durch die RDP Sitzung zu triggern

2026-08-11 09:52:49 +02:00
parent eec4f52b5a
commit ee88f1ff30
22 changed files with 1162 additions and 263 deletions
@@ -0,0 +1,65 @@
+#include "../Shared/TriggerProtocol.h"
+
+#include <windows.h>
+#include <wtsapi32.h>
+
+#include <cwchar>
+#include <stdlib.h>
+
+namespace
+{
+    enum class ExitCode : int
+    {
+        Success = 0,
+        ChannelOpenFailed = 10,
+        WriteFailed = 11,
+        PartialWrite = 12
+    };
+
+    void DebugError(const wchar_t* step, DWORD error)
+    {
+        wchar_t buffer[256]{};
+        swprintf_s(buffer, _countof(buffer), L"PlandentRdpClientTrigger: %s fehlgeschlagen, Win32=%lu\n", step, error);
+        OutputDebugStringW(buffer);
+    }
+}
+
+int APIENTRY wWinMain(HINSTANCE, HINSTANCE, PWSTR, int)
+{
+    // WTS_CURRENT_SESSION stellt sicher, dass ausschließlich der Client der
+    // RDP-Sitzung angesprochen wird, in der diese EXE ausgeführt wird.
+    HANDLE channel = WTSVirtualChannelOpenEx(
+        WTS_CURRENT_SESSION,
+        const_cast<LPSTR>(hook::protocol::kChannelName),
+        WTS_CHANNEL_OPTION_DYNAMIC | WTS_CHANNEL_OPTION_DYNAMIC_PRI_MED);
+
+    if (channel == nullptr)
+    {
+        DebugError(L"WTSVirtualChannelOpenEx", GetLastError());
+        return static_cast<int>(ExitCode::ChannelOpenFailed);
+    }
+
+    ULONG bytesWritten = 0;
+    BOOL written = WTSVirtualChannelWrite(
+        channel,
+        const_cast<PCHAR>(hook::protocol::kStartMessage),
+        static_cast<ULONG>(hook::protocol::kStartMessageLength),
+        &bytesWritten);
+
+    DWORD writeError = written ? ERROR_SUCCESS : GetLastError();
+    WTSVirtualChannelClose(channel);
+
+    if (!written)
+    {
+        DebugError(L"WTSVirtualChannelWrite", writeError);
+        return static_cast<int>(ExitCode::WriteFailed);
+    }
+
+    if (bytesWritten != static_cast<ULONG>(hook::protocol::kStartMessageLength))
+    {
+        OutputDebugStringW(L"PlandentRdpClientTrigger: Trigger-Nachricht wurde nur teilweise geschrieben.\n");
+        return static_cast<int>(ExitCode::PartialWrite);
+    }
+
+    return static_cast<int>(ExitCode::Success);
+}