diff options
Diffstat (limited to 'src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibDrmClient.cpp')
| -rw-r--r-- | src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibDrmClient.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibDrmClient.cpp b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibDrmClient.cpp new file mode 100644 index 00000000..79a6da13 --- /dev/null +++ b/src/VBox/Additions/common/VBoxGuest/lib/VBoxGuestR3LibDrmClient.cpp @@ -0,0 +1,199 @@ +/* $Id: VBoxGuestR3LibDrmClient.cpp $ */ +/** @file + * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, DRM client handling. + */ + +/* + * Copyright (C) 2020-2022 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox 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. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "VBoxGuestR3LibInternal.h" + +#include <iprt/env.h> +#include <iprt/path.h> +#include <iprt/process.h> + +#if defined(RT_OS_LINUX) +# include <VBox/HostServices/GuestPropertySvc.h> + +/** Defines the DRM client executable (image). */ +# define VBOX_DRMCLIENT_EXECUTABLE "/usr/bin/VBoxDRMClient" +# define VBOX_DRMCLIENT_LEGACY_EXECUTABLE "/usr/bin/VBoxClient" +/** Defines the guest property that defines if the DRM resizing client needs to be active or not. */ +# define VBOX_DRMCLIENT_GUEST_PROP_RESIZE "/VirtualBox/GuestAdd/DRMResize" + +/** + * Check if specified guest property exist. + * + * @returns \c true if the property exists and its flags do match, \c false otherwise. + * @param pszPropName Guest property name. + * @param fPropFlags Guest property flags mask to verify if property exist. + * If \p fPropFlags is 0, flags verification is omitted. + */ +static bool vbglR3DrmClientCheckProp(const char *pszPropName, uint32_t fPropFlags) +{ + bool fExist = false; +# if defined(VBOX_WITH_GUEST_PROPS) + uint32_t idClient; + + int rc = VbglR3GuestPropConnect(&idClient); + if (RT_SUCCESS(rc)) + { + char *pcszFlags = NULL; + + rc = VbglR3GuestPropReadEx(idClient, pszPropName, NULL /* ppszValue */, &pcszFlags, NULL); + if (RT_SUCCESS(rc)) + { + /* Check property flags match. */ + if (fPropFlags) + { + uint32_t fFlags = 0; + + rc = GuestPropValidateFlags(pcszFlags, &fFlags); + fExist = RT_SUCCESS(rc) && (fFlags == fPropFlags); + } + else + fExist = true; + + RTStrFree(pcszFlags); + } + + VbglR3GuestPropDisconnect(idClient); + } +# endif /* VBOX_WITH_GUEST_PROPS */ + return fExist; +} +#endif /* RT_OS_LINUX */ + +/** + * Returns true if the DRM resizing client is needed. + * This is achieved by querying existence of a guest property. + * + * @returns \c true if the DRM resizing client is needed, \c false if not. + */ +VBGLR3DECL(bool) VbglR3DrmClientIsNeeded(void) +{ +#if defined(RT_OS_LINUX) + return vbglR3DrmClientCheckProp(VBOX_DRMCLIENT_GUEST_PROP_RESIZE, 0); +#else + return false; +#endif +} + +/** + * Returns true if the DRM IPC server socket access should be restricted. + * + * Restricted access means that only users from a certain group should + * be granted with read and write access permission to IPC socket. Check + * is done by examining \c VBGLR3DRMIPCPROPRESTRICT guest property. Property + * is only considered valid if is read-only for guest. I.e., the following + * property should be set on the host side: + * + * VBoxManage guestproperty set <VM> /VirtualBox/GuestAdd/DRMIpcRestricted 1 --flags RDONLYGUEST + * + * @returns \c true if restricted socket access is required, \c false otherwise. + */ +VBGLR3DECL(bool) VbglR3DrmRestrictedIpcAccessIsNeeded(void) +{ +#if defined(RT_OS_LINUX) + return vbglR3DrmClientCheckProp(VBGLR3DRMIPCPROPRESTRICT, GUEST_PROP_F_RDONLYGUEST); +#else + return false; +#endif +} + +/** + * Returns true if the DRM resizing client already is running. + * This is achieved by querying existence of a guest property. + * + * @returns \c true if the DRM resizing client is running, \c false if not. + */ +VBGLR3DECL(bool) VbglR3DrmClientIsRunning(void) +{ + return VbglR3DrmClientIsNeeded(); +} + +#if defined(RT_OS_LINUX) +static int VbglR3DrmStart(const char *pszCmd, const char **apszArgs) +{ + return RTProcCreate(pszCmd, apszArgs, RTENV_DEFAULT, + RTPROC_FLAGS_DETACHED | RTPROC_FLAGS_SEARCH_PATH, NULL); +} +#endif + +/** + * Starts (executes) the DRM resizing client process ("VBoxDRMClient"). + * + * @returns VBox status code. + */ +VBGLR3DECL(int) VbglR3DrmClientStart(void) +{ +#if defined(RT_OS_LINUX) + const char *apszArgs[2] = { VBOX_DRMCLIENT_EXECUTABLE, NULL }; /** @todo r=andy Pass path + process name as argv0? */ + return VbglR3DrmStart(VBOX_DRMCLIENT_EXECUTABLE, apszArgs); +#else + return VERR_NOT_SUPPORTED; +#endif +} + +/** + * Starts (executes) the legacy DRM resizing client process ("VBoxClient --vmsvga"). + * + * @returns VBox status code. + */ +VBGLR3DECL(int) VbglR3DrmLegacyClientStart(void) +{ +#if defined(RT_OS_LINUX) + const char *apszArgs[3] = { VBOX_DRMCLIENT_LEGACY_EXECUTABLE, "--vmsvga", NULL }; + return VbglR3DrmStart(VBOX_DRMCLIENT_LEGACY_EXECUTABLE, apszArgs); +#else + return VERR_NOT_SUPPORTED; +#endif +} + +/** + * Starts (executes) the legacy X11 resizing agent process ("VBoxClient --display"). + * + * @returns VBox status code. + */ +VBGLR3DECL(int) VbglR3DrmLegacyX11AgentStart(void) +{ +#if defined(RT_OS_LINUX) + const char *apszArgs[3] = { VBOX_DRMCLIENT_LEGACY_EXECUTABLE, "--display", NULL }; + return VbglR3DrmStart(VBOX_DRMCLIENT_LEGACY_EXECUTABLE, apszArgs); +#else + return VERR_NOT_SUPPORTED; +#endif +} + |