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[host] converted program to a windows hidden/background user app.

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NvFBC will not start when running as a service, likely intentional
security of the API to prevent it from being abused.
This commit is contained in:
Geoffrey McRae 2017-11-01 03:23:46 +11:00
parent e935a09441
commit 01b10b3ee1
5 changed files with 32 additions and 162 deletions
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20
host/Capture/NvFBC.cpp
View File

@ -55,13 +55,25 @@ namespace Capture
status.dwVersion = NVFBC_STATUS_VER;
status.dwAdapterIdx = 0;
if (m_fnGetStatusEx(&status) != NVFBC_SUCCESS)
NVFBCRESULT ret = m_fnGetStatusEx(&status);
if (ret != NVFBC_SUCCESS)
{
DEBUG_ERROR("Failed to get NvFBC status");
DeInitialize();
return false;
DEBUG_INFO("Attempting to enable NvFBC");
if (m_fnEnable(NVFBC_STATE_ENABLE) == NVFBC_SUCCESS)
{
DEBUG_INFO("Success, attempting to get status again");
ret = m_fnGetStatusEx(&status);
}
if (ret != NVFBC_SUCCESS)
{
DEBUG_ERROR("Failed to get NvFBC status");
DeInitialize();
return false;
}
}
if (!status.bIsCapturePossible)
{
DEBUG_ERROR("Capture is not possible, unsupported device or driver");

7
host/Service.cpp
View File

@ -97,7 +97,7 @@ void Service::DeInitialize()
m_initialized = false;
}
bool Service::Process(HANDLE stopEvent)
bool Service::Process()
{
if (!m_initialized)
return false;
@ -142,10 +142,7 @@ bool Service::Process(HANDLE stopEvent)
// wait for the host to notify that is it is ready to proceed
ResetEvent(m_readyEvent);
while(
stopEvent == INVALID_HANDLE_VALUE ||
(WaitForSingleObject(stopEvent, 0) == WAIT_OBJECT_0)
)
while(true)
{
if (!m_ivshmem->RingDoorbell(header->hostID, 0))
{

2
host/Service.h
View File

@ -19,7 +19,7 @@ public:
bool Initialize();
void DeInitialize();
bool Process(HANDLE stopEvent);
bool Process();
private:
static Service * m_instance;

8
host/kvm-ivshmem-host.vcxproj
View File

@ -94,7 +94,7 @@
<AdditionalIncludeDirectories>..\;.\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<SubSystem>Windows</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;setupapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
@ -111,7 +111,7 @@
<AdditionalIncludeDirectories>..\;.\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<SubSystem>Windows</SubSystem>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;setupapi.lib;%(AdditionalDependencies)</AdditionalDependencies>
<AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
@ -130,7 +130,7 @@
<AdditionalIncludeDirectories>..\;.\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<SubSystem>Windows</SubSystem>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<GenerateDebugInformation>true</GenerateDebugInformation>
@ -151,7 +151,7 @@
<AdditionalIncludeDirectories>..\;.\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
</ClCompile>
<Link>
<SubSystem>Console</SubSystem>
<SubSystem>Windows</SubSystem>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
<OptimizeReferences>true</OptimizeReferences>
<GenerateDebugInformation>true</GenerateDebugInformation>

155
host/main.cpp
View File

@ -4,161 +4,22 @@
#include "Service.h"
#define SERVICE_NAME "kvm-ivshmem-host"
//=============================================================================
struct App
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdParam, int iCmdShow)
{
SERVICE_STATUS serviceStatus;
SERVICE_STATUS_HANDLE statusHandle;
HANDLE serviceStopEvent;
};
#ifdef DEBUG
AllocConsole();
#endif
struct App app =
{
{0},
NULL,
INVALID_HANDLE_VALUE
};
//=============================================================================
VOID WINAPI ServiceMain(DWORD argc, LPTSTR *argv);
VOID WINAPI ServiceCtrlHandler(DWORD CtrlCode);
DWORD WINAPI ServiceWorkerThread(LPVOID lpParam);
//=============================================================================
int main(int argc, TCHAR *argv[])
{
SERVICE_TABLE_ENTRY ServiceTable[] =
{
{_T(SERVICE_NAME), (LPSERVICE_MAIN_FUNCTION)ServiceMain},
{NULL, NULL}
};
if (StartServiceCtrlDispatcher(ServiceTable) == FALSE)
{
DWORD lastError = GetLastError();
if (lastError == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT)
{
ServiceWorkerThread(INVALID_HANDLE_VALUE);
getc(stdin);
return 0;
}
return lastError;
}
return 0;
}
//=============================================================================
VOID WINAPI ServiceMain(DWORD argc, LPTSTR *argv)
{
app.statusHandle = RegisterServiceCtrlHandler(_T(SERVICE_NAME), ServiceCtrlHandler);
if (!app.statusHandle)
return;
ZeroMemory(&app.serviceStatus, sizeof(app.serviceStatus));
app.serviceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
app.serviceStatus.dwControlsAccepted = 0;
app.serviceStatus.dwCurrentState = SERVICE_START_PENDING;
app.serviceStatus.dwWin32ExitCode = 0;
app.serviceStatus.dwServiceSpecificExitCode = 0;
app.serviceStatus.dwCheckPoint = 0;
if (SetServiceStatus(app.statusHandle, &app.serviceStatus) == FALSE)
{
DEBUG_ERROR("SetServiceStatus failed");
return;
}
app.serviceStopEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
if (app.serviceStopEvent == INVALID_HANDLE_VALUE)
{
app.serviceStatus.dwControlsAccepted = 0;
app.serviceStatus.dwCurrentState = SERVICE_STOPPED;
app.serviceStatus.dwWin32ExitCode = GetLastError();
app.serviceStatus.dwCheckPoint = 1;
if (SetServiceStatus(app.statusHandle, &app.serviceStatus) == FALSE)
{
DEBUG_ERROR("SetServiceStatus failed");
return;
}
}
app.serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
app.serviceStatus.dwCurrentState = SERVICE_RUNNING;
app.serviceStatus.dwWin32ExitCode = 0;
app.serviceStatus.dwCheckPoint = 0;
if (SetServiceStatus(app.statusHandle, &app.serviceStatus) == FALSE)
{
DEBUG_ERROR("SetServiceStatus failed");
return;
}
HANDLE hThread = CreateThread(NULL, 0, ServiceWorkerThread, NULL, 0, NULL);
WaitForSingleObject(hThread, INFINITE);
CloseHandle(app.serviceStopEvent);
app.serviceStatus.dwControlsAccepted = 0;
app.serviceStatus.dwCurrentState = SERVICE_STOPPED;
app.serviceStatus.dwWin32ExitCode = 0;
app.serviceStatus.dwCheckPoint = 3;
if (SetServiceStatus(app.statusHandle, &app.serviceStatus) == FALSE)
{
DEBUG_ERROR("SetServiceStatus failed");
return;
}
}
//=============================================================================
VOID WINAPI ServiceCtrlHandler(DWORD CtrlCode)
{
switch (CtrlCode)
{
case SERVICE_CONTROL_STOP:
if (app.serviceStatus.dwCurrentState != SERVICE_RUNNING)
break;
app.serviceStatus.dwControlsAccepted = 0;
app.serviceStatus.dwCurrentState = SERVICE_STOP_PENDING;
app.serviceStatus.dwWin32ExitCode = 0;
app.serviceStatus.dwCheckPoint = 4;
if (SetServiceStatus(app.statusHandle, &app.serviceStatus) == FALSE)
DEBUG_ERROR("SetServiceStatus failed");
SetEvent(app.serviceStopEvent);
break;
default:
break;
}
}
//=============================================================================
DWORD WINAPI ServiceWorkerThread(LPVOID lpParam)
{
Service *svc = svc->Get();
if (!svc->Initialize())
{
DEBUG_ERROR("Failed to initialize service");
return ERROR;
return -1;
}
while (WaitForSingleObject(app.serviceStopEvent, 0) != WAIT_OBJECT_0)
if (!svc->Process(app.serviceStopEvent))
break;
while (true)
svc->Process();
svc->DeInitialize();
return ERROR_SUCCESS;
return 0;
}
//=============================================================================