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/*++
Copyright (c) Microsoft Corporation. All rights reserved.
Module Name:
dllmain.cpp
Abstract:
The module contains the routines to handle the loading and unloading of the
notify object dll and the Wdf Coinstaller library.
--*/
#include "Common.hpp"
#include <DriverSpecs.h>
_Analysis_mode_(_Analysis_code_type_user_code_)
#include <strsafe.h>
#include "ProtNotify_i.c"
CComModule _Module;
// for example, WDF 1.9 is "01009". the size 6 includes the ending NULL marker
//
#define MAX_VERSION_SIZE 6
WCHAR G_coInstallerVersion[MAX_VERSION_SIZE] = {0};
HMODULE CoinstallerLibrary = NULL;
PFN_WDFPREDEVICEINSTALL pfnWdfPreDeviceInstall = NULL;
PFN_WDFPOSTDEVICEINSTALL pfnWdfPostDeviceInstall = NULL;
PFN_WDFPREDEVICEREMOVE pfnWdfPreDeviceRemove = NULL;
PFN_WDFPOSTDEVICEREMOVE pfnWdfPostDeviceRemove = NULL;
//
// Private methods.
//
HMODULE
LoadWdfCoInstaller(
);
VOID
UnloadWdfCoInstaller(
HMODULE Library
);
extern "C"
BOOL
WINAPI
DllMain(
_In_ HINSTANCE Instance,
_In_ DWORD Reason,
_In_ LPVOID Reserved
)
{
UNREFERENCED_PARAMETER(Reserved);
if (Reason == DLL_PROCESS_ATTACH) {
//
// Initialize the COM Server module with the object map.
// Do this prior to loading the coinstaller as the detach
// assumes the Module is initialized.
//
_Module.Init(ObjectMap, Instance);
DisableThreadLibraryCalls(Instance);
//
// Load the Wdf Coinstaller library.
//
CoinstallerLibrary = LoadWdfCoInstaller();
if (CoinstallerLibrary == NULL) {
return FALSE;
}
}
else if (Reason == DLL_PROCESS_DETACH) {
//
// Relesae the COM Server.
//
_Module.Term();
//
// Unload the Wdf Coinstaller library.
//
UnloadWdfCoInstaller(CoinstallerLibrary);
}
return TRUE;
}
__control_entrypoint(DllExport)
STDAPI DllCanUnloadNow(
)
{
//
// Determine whether the DLL can be unloaded by OLE
//
return (_Module.GetLockCount() == 0) ? S_OK : S_FALSE;
}
_Check_return_
STDAPI
DllGetClassObject(
_In_ REFCLSID rclsid,
_In_ REFIID riid,
_Outptr_ LPVOID FAR* ppv
)
{
//
// Return a class factory to create an object of the requested type
//
return _Module.GetClassObject(rclsid, riid, ppv);
}
STDAPI DllRegisterServer(
)
{
//
// Register object, typelib and all interfaces in typelib
//
return _Module.RegisterServer(TRUE);
}
STDAPI DllUnregisterServer(
)
{
//
// Remove entries from the system registry
//
_Module.UnregisterServer();
return S_OK;
}
PWCHAR
GetCoinstallerVersion(
VOID
)
{
if (FAILED( StringCchPrintf(G_coInstallerVersion,
MAX_VERSION_SIZE,
L"%02d%03d", // for example, "01009"
KMDF_VERSION_MAJOR,
KMDF_VERSION_MINOR)))
{
printf("StringCchCopy failed with error \n");
}
return (PWCHAR)&G_coInstallerVersion;
}
HMODULE
LoadWdfCoInstaller(
)
{
#pragma prefast(suppress:6262, "Supprress overflow warnings")
HRESULT hr = S_OK;
HMODULE library = NULL;
WCHAR coinstaller[MAX_PATH] = {0};
WCHAR coinstallerName[MAX_PATH/2];
PWCHAR coinstallerVersion;
//
// Construct the full file name for the Wdf Coinstaller dll.
//
if (GetSystemDirectory(coinstaller, MAX_PATH) == 0) {
hr = GetLastError();
goto exit;
}
coinstallerVersion = GetCoinstallerVersion();
if (FAILED( StringCchPrintf(coinstallerName,
MAX_PATH/2,
L"\\WdfCoInstaller%s.dll",
coinstallerVersion) )) {
goto exit;
}
hr = StringCchCat(coinstaller, MAX_PATH, coinstallerName);
if (FAILED(hr)) {
goto exit;
}
//
// Load the Wdf Coinstaller library.
//
#pragma prefast(suppress:28160, "Suppressing false positive from PFD")
library = LoadLibrary(coinstaller);
if (library == NULL) {
hr = GetLastError();
goto exit;
}
pfnWdfPreDeviceInstall = (PFN_WDFPREDEVICEINSTALL) GetProcAddress(library, "WdfPreDeviceInstall");
if (pfnWdfPreDeviceInstall == NULL) {
hr = GetLastError();
goto exit;
}
pfnWdfPostDeviceInstall = (PFN_WDFPOSTDEVICEINSTALL) GetProcAddress(library, "WdfPostDeviceInstall");
if (pfnWdfPostDeviceInstall == NULL) {
hr = GetLastError();
goto exit;
}
pfnWdfPreDeviceRemove = (PFN_WDFPREDEVICEREMOVE) GetProcAddress(library, "WdfPreDeviceRemove");
if (pfnWdfPreDeviceRemove == NULL) {
hr = GetLastError();
goto exit;
}
pfnWdfPostDeviceRemove = (PFN_WDFPREDEVICEREMOVE) GetProcAddress(library, "WdfPostDeviceRemove");
if (pfnWdfPostDeviceRemove == NULL) {
hr = GetLastError();
goto exit;
}
exit:
//
// Unload the Wdf Coinstaller library in case of an error.
//
if (FAILED(hr)) {
UnloadWdfCoInstaller(library);
library = NULL;
}
SetLastError(hr);
return library;
}
VOID
UnloadWdfCoInstaller(
HMODULE Library
)
{
if (Library) {
FreeLibrary( Library );
}
pfnWdfPreDeviceInstall = NULL;
pfnWdfPostDeviceInstall = NULL;
pfnWdfPreDeviceRemove = NULL;
pfnWdfPostDeviceRemove = NULL;
}
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