/* $Id: VBoxServiceUtils.cpp 62850 2016-08-01 22:00:52Z vboxsync $ */ /** @file * VBoxServiceUtils - Some utility functions. */ /* * Copyright (C) 2009-2016 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 * *********************************************************************************************************************************/ #ifdef RT_OS_WINDOWS # include # include # include #endif #include #include #include #include #include "VBoxServiceInternal.h" #ifdef VBOX_WITH_GUEST_PROPS /** * Reads a guest property. * * @returns VBox status code, fully bitched. * * @param u32ClientId The HGCM client ID for the guest property session. * @param pszPropName The property name. * @param ppszValue Where to return the value. This is always set * to NULL. Free it using RTStrFree(). * @param ppszFlags Where to return the value flags. Free it * using RTStrFree(). Optional. * @param puTimestamp Where to return the timestamp. This is only set * on success. Optional. */ int VGSvcReadProp(uint32_t u32ClientId, const char *pszPropName, char **ppszValue, char **ppszFlags, uint64_t *puTimestamp) { AssertPtrReturn(pszPropName, VERR_INVALID_POINTER); AssertPtrReturn(ppszValue, VERR_INVALID_POINTER); uint32_t cbBuf = _1K; void *pvBuf = NULL; int rc = VINF_SUCCESS; /* MSC can't figure out the loop */ *ppszValue = NULL; for (unsigned cTries = 0; cTries < 10; cTries++) { /* * (Re-)Allocate the buffer and try read the property. */ RTMemFree(pvBuf); pvBuf = RTMemAlloc(cbBuf); if (!pvBuf) { VGSvcError("Guest Property: Failed to allocate %zu bytes\n", cbBuf); rc = VERR_NO_MEMORY; break; } char *pszValue; char *pszFlags; uint64_t uTimestamp; rc = VbglR3GuestPropRead(u32ClientId, pszPropName, pvBuf, cbBuf, &pszValue, &uTimestamp, &pszFlags, NULL); if (RT_FAILURE(rc)) { if (rc == VERR_BUFFER_OVERFLOW) { /* try again with a bigger buffer. */ cbBuf *= 2; continue; } if (rc == VERR_NOT_FOUND) VGSvcVerbose(2, "Guest Property: %s not found\n", pszPropName); else VGSvcError("Guest Property: Failed to query '%s': %Rrc\n", pszPropName, rc); break; } VGSvcVerbose(2, "Guest Property: Read '%s' = '%s', timestamp %RU64n\n", pszPropName, pszValue, uTimestamp); *ppszValue = RTStrDup(pszValue); if (!*ppszValue) { VGSvcError("Guest Property: RTStrDup failed for '%s'\n", pszValue); rc = VERR_NO_MEMORY; break; } if (puTimestamp) *puTimestamp = uTimestamp; if (ppszFlags) *ppszFlags = RTStrDup(pszFlags); break; /* done */ } if (pvBuf) RTMemFree(pvBuf); return rc; } /** * Reads a guest property as a 32-bit value. * * @returns VBox status code, fully bitched. * * @param u32ClientId The HGCM client ID for the guest property session. * @param pszPropName The property name. * @param pu32 Where to store the 32-bit value. * */ int VGSvcReadPropUInt32(uint32_t u32ClientId, const char *pszPropName, uint32_t *pu32, uint32_t u32Min, uint32_t u32Max) { char *pszValue; int rc = VGSvcReadProp(u32ClientId, pszPropName, &pszValue, NULL /* ppszFlags */, NULL /* puTimestamp */); if (RT_SUCCESS(rc)) { char *pszNext; rc = RTStrToUInt32Ex(pszValue, &pszNext, 0, pu32); if ( RT_SUCCESS(rc) && (*pu32 < u32Min || *pu32 > u32Max)) rc = VGSvcError("The guest property value %s = %RU32 is out of range [%RU32..%RU32].\n", pszPropName, *pu32, u32Min, u32Max); RTStrFree(pszValue); } return rc; } /** * Reads a guest property from the host side. * * @returns IPRT status code, fully bitched. * @param u32ClientId The HGCM client ID for the guest property session. * @param pszPropName The property name. * @param fReadOnly Whether or not this property needs to be read only * by the guest side. Otherwise VERR_ACCESS_DENIED will * be returned. * @param ppszValue Where to return the value. This is always set * to NULL. Free it using RTStrFree(). * @param ppszFlags Where to return the value flags. Free it * using RTStrFree(). Optional. * @param puTimestamp Where to return the timestamp. This is only set * on success. Optional. */ int VGSvcReadHostProp(uint32_t u32ClientId, const char *pszPropName, bool fReadOnly, char **ppszValue, char **ppszFlags, uint64_t *puTimestamp) { AssertPtrReturn(ppszValue, VERR_INVALID_PARAMETER); char *pszValue = NULL; char *pszFlags = NULL; int rc = VGSvcReadProp(u32ClientId, pszPropName, &pszValue, &pszFlags, puTimestamp); if (RT_SUCCESS(rc)) { /* Check security bits. */ if ( fReadOnly /* Do we except a guest read-only property */ && !RTStrStr(pszFlags, "RDONLYGUEST")) { /* If we want a property which is read-only on the guest * and it is *not* marked as such, deny access! */ rc = VERR_ACCESS_DENIED; } if (RT_SUCCESS(rc)) { *ppszValue = pszValue; if (ppszFlags) *ppszFlags = pszFlags; else if (pszFlags) RTStrFree(pszFlags); } else { if (pszValue) RTStrFree(pszValue); if (pszFlags) RTStrFree(pszFlags); } } return rc; } /** * Wrapper around VbglR3GuestPropWriteValue that does value formatting and * logging. * * @returns VBox status code. Errors will be logged. * * @param u32ClientId The HGCM client ID for the guest property session. * @param pszName The property name. * @param pszValueFormat The property format string. If this is NULL then * the property will be deleted (if possible). * @param ... Format arguments. */ int VGSvcWritePropF(uint32_t u32ClientId, const char *pszName, const char *pszValueFormat, ...) { AssertPtr(pszName); int rc; if (pszValueFormat != NULL) { va_list va; va_start(va, pszValueFormat); VGSvcVerbose(3, "Writing guest property '%s' = '%N'\n", pszName, pszValueFormat, &va); va_end(va); va_start(va, pszValueFormat); rc = VbglR3GuestPropWriteValueV(u32ClientId, pszName, pszValueFormat, va); va_end(va); if (RT_FAILURE(rc)) VGSvcError("Error writing guest property '%s' (rc=%Rrc)\n", pszName, rc); } else { VGSvcVerbose(3, "Deleting guest property '%s'\n", pszName); rc = VbglR3GuestPropWriteValue(u32ClientId, pszName, NULL); if (RT_FAILURE(rc)) VGSvcError("Error deleting guest property '%s' (rc=%Rrc)\n", pszName, rc); } return rc; } #endif /* VBOX_WITH_GUEST_PROPS */ #ifdef RT_OS_WINDOWS /** * Helper for vgsvcUtilGetFileVersion and attempts to read and parse * FileVersion. * * @returns Success indicator. */ static bool vgsvcUtilGetFileVersionOwn(LPSTR pVerData, PDWORD pdwMajor, PDWORD pdwMinor, PDWORD pdwBuildNumber, PDWORD pdwRevisionNumber) { UINT cchStrValue = 0; LPTSTR pStrValue = NULL; if (!VerQueryValueA(pVerData, "\\StringFileInfo\\040904b0\\FileVersion", (LPVOID *)&pStrValue, &cchStrValue)) return false; /** @todo r=bird: get rid of this. Avoid sscanf like the plague! */ if (sscanf(pStrValue, "%ld.%ld.%ld.%ld", pdwMajor, pdwMinor, pdwBuildNumber, pdwRevisionNumber) != 4) return false; return true; } /** * Worker for VGSvcUtilWinGetFileVersionString. * * @returns VBox status code. * @param pszFilename ASCII & ANSI & UTF-8 compliant name. * @param pdwMajor Where to return the major version number. * @param pdwMinor Where to return the minor version number. * @param pdwBuildNumber Where to return the build number. * @param pdwRevisionNumber Where to return the revision number. */ static int vgsvcUtilGetFileVersion(const char *pszFilename, PDWORD pdwMajor, PDWORD pdwMinor, PDWORD pdwBuildNumber, PDWORD pdwRevisionNumber) { int rc; *pdwMajor = *pdwMinor = *pdwBuildNumber = *pdwRevisionNumber = 0; /* * Get the file version info. */ DWORD dwHandleIgnored; DWORD cbVerData = GetFileVersionInfoSizeA(pszFilename, &dwHandleIgnored); if (cbVerData) { LPTSTR pVerData = (LPTSTR)RTMemTmpAllocZ(cbVerData); if (pVerData) { if (GetFileVersionInfoA(pszFilename, dwHandleIgnored, cbVerData, pVerData)) { /* * Try query and parse the FileVersion string our selves first * since this will give us the correct revision number when * it goes beyond the range of an uint16_t / WORD. */ if (vgsvcUtilGetFileVersionOwn(pVerData, pdwMajor, pdwMinor, pdwBuildNumber, pdwRevisionNumber)) rc = VINF_SUCCESS; else { /* Fall back on VS_FIXEDFILEINFO */ UINT cbFileInfoIgnored = 0; VS_FIXEDFILEINFO *pFileInfo = NULL; if (VerQueryValue(pVerData, "\\", (LPVOID *)&pFileInfo, &cbFileInfoIgnored)) { *pdwMajor = HIWORD(pFileInfo->dwFileVersionMS); *pdwMinor = LOWORD(pFileInfo->dwFileVersionMS); *pdwBuildNumber = HIWORD(pFileInfo->dwFileVersionLS); *pdwRevisionNumber = LOWORD(pFileInfo->dwFileVersionLS); rc = VINF_SUCCESS; } else { rc = RTErrConvertFromWin32(GetLastError()); VGSvcVerbose(3, "No file version value for file '%s' available! (%d / rc=%Rrc)\n", pszFilename, GetLastError(), rc); } } } else { rc = RTErrConvertFromWin32(GetLastError()); VGSvcVerbose(0, "GetFileVersionInfo(%s) -> %u / %Rrc\n", pszFilename, GetLastError(), rc); } RTMemTmpFree(pVerData); } else { VGSvcVerbose(0, "Failed to allocate %u byte for file version info for '%s'\n", cbVerData, pszFilename); rc = VERR_NO_TMP_MEMORY; } } else { rc = RTErrConvertFromWin32(GetLastError()); VGSvcVerbose(3, "GetFileVersionInfoSize(%s) -> %u / %Rrc\n", pszFilename, GetLastError(), rc); } return rc; } /** * Gets a re-formatted version string from the VS_FIXEDFILEINFO table. * * @returns VBox status code. The output buffer is always valid and the status * code can safely be ignored. * * @param pszPath The base path. * @param pszFilename The filename. * @param pszVersion Where to return the version string. * @param cbVersion The size of the version string buffer. This MUST be * at least 2 bytes! */ int VGSvcUtilWinGetFileVersionString(const char *pszPath, const char *pszFilename, char *pszVersion, size_t cbVersion) { /* * We will ALWAYS return with a valid output buffer. */ AssertReturn(cbVersion >= 2, VERR_BUFFER_OVERFLOW); pszVersion[0] = '-'; pszVersion[1] = '\0'; /* * Create the path and query the bits. */ char szFullPath[RTPATH_MAX]; int rc = RTPathJoin(szFullPath, sizeof(szFullPath), pszPath, pszFilename); if (RT_SUCCESS(rc)) { DWORD dwMajor, dwMinor, dwBuild, dwRev; rc = vgsvcUtilGetFileVersion(szFullPath, &dwMajor, &dwMinor, &dwBuild, &dwRev); if (RT_SUCCESS(rc)) RTStrPrintf(pszVersion, cbVersion, "%u.%u.%ur%u", dwMajor, dwMinor, dwBuild, dwRev); } return rc; } #endif /* RT_OS_WINDOWS */