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/* $Id: VBoxCredProvPoller.cpp $ */
/** @file
* VBoxCredPoller - Thread for querying / retrieving user credentials.
*/
/*
* 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.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <Windows.h>
#include <VBox/VBoxGuest.h>
#include <VBox/VBoxGuestLib.h>
#include <VBox/VMMDev.h>
#include <iprt/string.h>
#include "VBoxCredProvProvider.h"
#include "VBoxCredProvCredential.h"
#include "VBoxCredProvPoller.h"
#include "VBoxCredProvUtils.h"
VBoxCredProvPoller::VBoxCredProvPoller(void) :
m_hThreadPoller(NIL_RTTHREAD),
m_pProv(NULL)
{
}
VBoxCredProvPoller::~VBoxCredProvPoller(void)
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Destroying ...\n");
Shutdown();
}
int
VBoxCredProvPoller::Initialize(VBoxCredProvProvider *pProvider)
{
AssertPtrReturn(pProvider, VERR_INVALID_POINTER);
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Initializing\n");
/* Don't create more than one of them. */
if (m_hThreadPoller != NIL_RTTHREAD)
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Thread already running, returning\n");
return VINF_SUCCESS;
}
if (m_pProv != NULL)
m_pProv->Release();
m_pProv = pProvider;
/*
* We must not add a reference via AddRef() here, otherwise
* the credential provider does not get destructed properly.
* In order to get this thread terminated normally the credential
* provider has to call Shutdown().
*/
/* Create the poller thread. */
int rc = RTThreadCreate(&m_hThreadPoller, VBoxCredProvPoller::threadPoller, this, 0, RTTHREADTYPE_INFREQUENT_POLLER,
RTTHREADFLAGS_WAITABLE, "credpoll");
if (RT_FAILURE(rc))
VBoxCredProvVerbose(0, "VBoxCredProvPoller::Initialize: Failed to create thread, rc=%Rrc\n", rc);
return rc;
}
int
VBoxCredProvPoller::Shutdown(void)
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Shutdown\n");
if (m_hThreadPoller == NIL_RTTHREAD)
return VINF_SUCCESS;
/* Post termination event semaphore. */
int rc = RTThreadUserSignal(m_hThreadPoller);
if (RT_SUCCESS(rc))
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Waiting for thread to terminate\n");
/* Wait until the thread has terminated. */
rc = RTThreadWait(m_hThreadPoller, RT_INDEFINITE_WAIT, NULL);
if (RT_FAILURE(rc))
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Wait returned error rc=%Rrc\n", rc);
}
else
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Error waiting for thread shutdown, rc=%Rrc\n", rc);
m_pProv = NULL;
m_hThreadPoller = NIL_RTTHREAD;
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Shutdown returned with rc=%Rrc\n", rc);
return rc;
}
/*static*/ DECLCALLBACK(int)
VBoxCredProvPoller::threadPoller(RTTHREAD hThreadSelf, void *pvUser)
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Starting, pvUser=0x%p\n", pvUser);
VBoxCredProvPoller *pThis = (VBoxCredProvPoller*)pvUser;
AssertPtr(pThis);
for (;;)
{
int rc;
rc = VbglR3CredentialsQueryAvailability();
if (RT_FAILURE(rc))
{
if (rc != VERR_NOT_FOUND)
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Could not retrieve credentials! rc=%Rc\n", rc);
}
else
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Credentials available, notifying provider\n");
if (pThis->m_pProv)
pThis->m_pProv->OnCredentialsProvided();
}
/* Wait a bit. */
if (RTThreadUserWait(hThreadSelf, 500) == VINF_SUCCESS)
{
VBoxCredProvVerbose(0, "VBoxCredProvPoller: Terminating\n");
break;
}
}
return VINF_SUCCESS;
}
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