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/* $Id: */
/** @file
* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, host version check.
*/
/*
* Copyright (C) 2009-2019 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.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <stdio.h> /* Required for sscanf */
#include <iprt/string.h>
#include <VBox/log.h>
#ifdef RT_OS_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include <iprt/win/windows.h>
#endif
#include "VBoxGuestR3LibInternal.h"
/**
* Checks for a Guest Additions update by comparing the installed version on the
* guest and the reported host version.
*
* @returns VBox status code
*
* @param idClient The client id returned by
* VbglR3InfoSvcConnect().
* @param pfUpdate Receives pointer to boolean flag indicating
* whether an update was found or not.
* @param ppszHostVersion Receives pointer of allocated version string.
* The returned pointer must be freed using
* VbglR3GuestPropReadValueFree(). Always set to
* NULL.
* @param ppszGuestVersion Receives pointer of allocated revision string.
* The returned pointer must be freed using
* VbglR3GuestPropReadValueFree(). Always set to
* NULL.
*/
VBGLR3DECL(int) VbglR3HostVersionCheckForUpdate(HGCMCLIENTID idClient, bool *pfUpdate, char **ppszHostVersion, char **ppszGuestVersion)
{
Assert(idClient > 0);
AssertPtr(pfUpdate);
AssertPtr(ppszHostVersion);
AssertPtr(ppszGuestVersion);
*ppszHostVersion = NULL;
*ppszGuestVersion = NULL;
/* We assume we have an update initially.
Every block down below is allowed to veto */
*pfUpdate = true;
/* Do we need to do all this stuff? */
char *pszCheckHostVersion;
int rc = VbglR3GuestPropReadValueAlloc(idClient, "/VirtualBox/GuestAdd/CheckHostVersion", &pszCheckHostVersion);
if (RT_FAILURE(rc))
{
if (rc == VERR_NOT_FOUND)
rc = VINF_SUCCESS; /* If we don't find the value above we do the check by default */
else
LogFlow(("Could not read check host version flag! rc = %Rrc\n", rc));
}
else
{
/* Only don't do the check if we have a valid "0" in it */
if (!strcmp(pszCheckHostVersion, "0"))
{
LogRel(("No host version update check performed (disabled).\n"));
*pfUpdate = false;
}
VbglR3GuestPropReadValueFree(pszCheckHostVersion);
}
/* Collect all needed information */
/* Make sure we only notify the user once by comparing the host version with
* the last checked host version (if any) */
if (RT_SUCCESS(rc) && *pfUpdate)
{
/* Look up host version */
rc = VbglR3GuestPropReadValueAlloc(idClient, "/VirtualBox/HostInfo/VBoxVer", ppszHostVersion);
if (RT_FAILURE(rc))
{
LogFlow(("Could not read VBox host version! rc = %Rrc\n", rc));
}
else
{
LogFlow(("Host version: %s\n", *ppszHostVersion));
/* Get last checked host version */
char *pszLastCheckedHostVersion;
rc = VbglR3HostVersionLastCheckedLoad(idClient, &pszLastCheckedHostVersion);
if (RT_SUCCESS(rc))
{
LogFlow(("Last checked host version: %s\n", pszLastCheckedHostVersion));
if (strcmp(*ppszHostVersion, pszLastCheckedHostVersion) == 0)
*pfUpdate = false; /* We already notified this version, skip */
VbglR3GuestPropReadValueFree(pszLastCheckedHostVersion);
}
else if (rc == VERR_NOT_FOUND) /* Never wrote a last checked host version before */
{
LogFlow(("Never checked a host version before.\n"));
rc = VINF_SUCCESS;
}
}
/* Look up guest version */
if (RT_SUCCESS(rc))
{
rc = VbglR3GetAdditionsVersion(ppszGuestVersion, NULL /* Extended version not needed here */,
NULL /* Revision not needed here */);
if (RT_FAILURE(rc))
LogFlow(("Could not read VBox guest version! rc = %Rrc\n", rc));
}
}
/* Do the actual version comparison (if needed, see block(s) above) */
if (RT_SUCCESS(rc) && *pfUpdate)
{
if (RTStrVersionCompare(*ppszHostVersion, *ppszGuestVersion) > 0) /* Is host version greater than guest add version? */
{
/* Yay, we have an update! */
LogRel(("Guest Additions update found! Please upgrade this machine to the latest Guest Additions.\n"));
}
else
{
/* How sad ... */
*pfUpdate = false;
}
}
/* Cleanup on failure */
if (RT_FAILURE(rc))
{
if (*ppszHostVersion)
{
VbglR3GuestPropReadValueFree(*ppszHostVersion);
*ppszHostVersion = NULL;
}
if (*ppszGuestVersion)
{
VbglR3GuestPropReadValueFree(*ppszGuestVersion);
*ppszGuestVersion = NULL;
}
}
return rc;
}
/** Retrieves the last checked host version.
*
* @returns VBox status code.
*
* @param idClient The client id returned by VbglR3InfoSvcConnect().
* @param ppszVer Receives pointer of allocated version string.
* The returned pointer must be freed using RTStrFree() on VINF_SUCCESS.
*/
VBGLR3DECL(int) VbglR3HostVersionLastCheckedLoad(HGCMCLIENTID idClient, char **ppszVer)
{
Assert(idClient > 0);
AssertPtr(ppszVer);
return VbglR3GuestPropReadValueAlloc(idClient, "/VirtualBox/GuestAdd/HostVerLastChecked", ppszVer);
}
/** Stores the last checked host version for later lookup.
* Requires strings in form of "majorVer.minorVer.build".
*
* @returns VBox status code.
*
* @param idClient The client id returned by VbglR3InfoSvcConnect().
* @param pszVer Pointer to version string to store.
*/
VBGLR3DECL(int) VbglR3HostVersionLastCheckedStore(HGCMCLIENTID idClient, const char *pszVer)
{
Assert(idClient > 0);
AssertPtr(pszVer);
return VbglR3GuestPropWriteValue(idClient, "/VirtualBox/GuestAdd/HostVerLastChecked", pszVer);
}
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