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/* $Id: VBoxMMR.cpp $ */
/** @file
* VBoxMMR - Multimedia Redirection
*/
/*
* Copyright (C) 2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include "VBoxTray.h"
#include "VBoxMMR.h"
#include <iprt/ldr.h>
struct VBOXMMRCONTEXT
{
RTLDRMOD hModHook;
HHOOK hHook;
};
static VBOXMMRCONTEXT gCtx = {0};
static const char *g_pszMMRDLL = "VBoxMMRHook";
static const char *g_pszMMRPROC = "CBTProc";
void VBoxMMRCleanup(VBOXMMRCONTEXT *pCtx)
{
if (pCtx->hHook)
{
UnhookWindowsHookEx(pCtx->hHook);
pCtx->hHook = NULL;
}
if (pCtx->hModHook != NIL_RTLDRMOD)
{
RTLdrClose(pCtx->hModHook);
pCtx->hModHook = NIL_RTLDRMOD;
}
}
int VBoxMMRInit(const VBOXSERVICEENV *pEnv, void **ppInstance, bool *pfStartThread)
{
LogRel2(("VBoxMMR: Initializing\n"));
int rc = RTLdrLoadAppPriv(g_pszMMRDLL, &gCtx.hModHook);
if (RT_SUCCESS(rc))
{
HOOKPROC pHook = (HOOKPROC)RTLdrGetFunction(gCtx.hModHook, g_pszMMRPROC);
if (pHook)
{
HMODULE hMod = (HMODULE)RTLdrGetNativeHandle(gCtx.hModHook);
Assert(hMod != (HMODULE)~(uintptr_t)0);
gCtx.hHook = SetWindowsHookEx(WH_CBT, pHook, hMod, 0);
if (gCtx.hHook)
{
*ppInstance = &gCtx;
return VINF_SUCCESS;
}
rc = RTErrConvertFromWin32(GetLastError());
LogRel2(("VBoxMMR: Error installing hooking proc: %Rrc\n", rc));
}
else
{
LogRel2(("VBoxMMR: Hooking proc not found\n"));
rc = VERR_NOT_FOUND;
}
RTLdrClose(gCtx.hModHook);
gCtx.hModHook = NIL_RTLDRMOD;
}
else
LogRel2(("VBoxMMR: Hooking library not found (%Rrc)\n", rc));
return rc;
}
void VBoxMMRDestroy(const VBOXSERVICEENV *pEnv, void *pInstance)
{
VBOXMMRCONTEXT *pCtx = (VBOXMMRCONTEXT *) pInstance;
VBoxMMRCleanup(pCtx);
}
unsigned __stdcall VBoxMMRThread(void *pInstance)
{
return 0;
}
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