| 1 | /* $Id: */
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| 2 | /** @file
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| 3 | * VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, host version check.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2022 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <stdio.h> /* Required for sscanf */
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| 32 | #include <iprt/string.h>
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| 33 | #include <VBox/log.h>
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| 34 |
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| 35 | #ifdef RT_OS_WINDOWS
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| 36 | #define WIN32_LEAN_AND_MEAN
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| 37 | #include <iprt/win/windows.h>
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| 38 | #endif
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| 39 |
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| 40 | #include "VBoxGuestR3LibInternal.h"
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| 41 |
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| 42 | /**
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| 43 | * Checks for a Guest Additions update by comparing the installed version on the
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| 44 | * guest and the reported host version.
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| 45 | *
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| 46 | * @returns VBox status code
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| 47 | *
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| 48 | * @param idClient The client id returned by
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| 49 | * VbglR3InfoSvcConnect().
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| 50 | * @param pfUpdate Receives pointer to boolean flag indicating
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| 51 | * whether an update was found or not.
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| 52 | * @param ppszHostVersion Receives pointer of allocated version string.
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| 53 | * The returned pointer must be freed using
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| 54 | * VbglR3GuestPropReadValueFree(). Always set to
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| 55 | * NULL.
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| 56 | * @param ppszGuestVersion Receives pointer of allocated revision string.
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| 57 | * The returned pointer must be freed using
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| 58 | * VbglR3GuestPropReadValueFree(). Always set to
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| 59 | * NULL.
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| 60 | */
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| 61 | VBGLR3DECL(int) VbglR3HostVersionCheckForUpdate(HGCMCLIENTID idClient, bool *pfUpdate, char **ppszHostVersion, char **ppszGuestVersion)
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| 62 | {
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| 63 | #ifdef VBOX_WITH_GUEST_PROPS
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| 64 | Assert(idClient > 0);
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| 65 | AssertPtr(pfUpdate);
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| 66 | AssertPtr(ppszHostVersion);
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| 67 | AssertPtr(ppszGuestVersion);
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| 68 |
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| 69 | *ppszHostVersion = NULL;
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| 70 | *ppszGuestVersion = NULL;
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| 71 |
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| 72 | /* We assume we have an update initially.
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| 73 | Every block down below is allowed to veto */
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| 74 | *pfUpdate = true;
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| 75 |
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| 76 | /* Do we need to do all this stuff? */
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| 77 | char *pszCheckHostVersion;
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| 78 | int rc = VbglR3GuestPropReadValueAlloc(idClient, "/VirtualBox/GuestAdd/CheckHostVersion", &pszCheckHostVersion);
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| 79 | if (RT_FAILURE(rc))
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| 80 | {
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| 81 | if (rc == VERR_NOT_FOUND)
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| 82 | rc = VINF_SUCCESS; /* If we don't find the value above we do the check by default */
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| 83 | else
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| 84 | LogFlow(("Could not read check host version flag! rc = %Rrc\n", rc));
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| 85 | }
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| 86 | else
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| 87 | {
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| 88 | /* Only don't do the check if we have a valid "0" in it */
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| 89 | if (!strcmp(pszCheckHostVersion, "0"))
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| 90 | {
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| 91 | LogRel(("No host version update check performed (disabled).\n"));
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| 92 | *pfUpdate = false;
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| 93 | }
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| 94 | VbglR3GuestPropReadValueFree(pszCheckHostVersion);
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| 95 | }
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| 96 |
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| 97 | /* Collect all needed information */
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| 98 | /* Make sure we only notify the user once by comparing the host version with
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| 99 | * the last checked host version (if any) */
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| 100 | if (RT_SUCCESS(rc) && *pfUpdate)
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| 101 | {
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| 102 | /* Look up host version */
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| 103 | rc = VbglR3GuestPropReadValueAlloc(idClient, "/VirtualBox/HostInfo/VBoxVer", ppszHostVersion);
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| 104 | if (RT_FAILURE(rc))
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| 105 | {
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| 106 | LogFlow(("Could not read VBox host version! rc = %Rrc\n", rc));
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| 107 | }
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| 108 | else
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| 109 | {
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| 110 | LogFlow(("Host version: %s\n", *ppszHostVersion));
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| 111 |
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| 112 | /* Get last checked host version */
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| 113 | char *pszLastCheckedHostVersion;
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| 114 | rc = VbglR3HostVersionLastCheckedLoad(idClient, &pszLastCheckedHostVersion);
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| 115 | if (RT_SUCCESS(rc))
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| 116 | {
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| 117 | LogFlow(("Last checked host version: %s\n", pszLastCheckedHostVersion));
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| 118 | if (strcmp(*ppszHostVersion, pszLastCheckedHostVersion) == 0)
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| 119 | *pfUpdate = false; /* We already notified this version, skip */
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| 120 | VbglR3GuestPropReadValueFree(pszLastCheckedHostVersion);
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| 121 | }
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| 122 | else if (rc == VERR_NOT_FOUND) /* Never wrote a last checked host version before */
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| 123 | {
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| 124 | LogFlow(("Never checked a host version before.\n"));
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| 125 | rc = VINF_SUCCESS;
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| 126 | }
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| 127 | }
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| 128 |
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| 129 | /* Look up guest version */
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| 130 | if (RT_SUCCESS(rc))
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| 131 | {
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| 132 | rc = VbglR3GetAdditionsVersion(ppszGuestVersion, NULL /* Extended version not needed here */,
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| 133 | NULL /* Revision not needed here */);
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| 134 | if (RT_FAILURE(rc))
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| 135 | LogFlow(("Could not read VBox guest version! rc = %Rrc\n", rc));
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| 136 | }
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| 137 | }
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| 138 |
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| 139 | /* Do the actual version comparison (if needed, see block(s) above) */
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| 140 | if (RT_SUCCESS(rc) && *pfUpdate)
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| 141 | {
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| 142 | if (RTStrVersionCompare(*ppszHostVersion, *ppszGuestVersion) > 0) /* Is host version greater than guest add version? */
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| 143 | {
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| 144 | /* Yay, we have an update! */
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| 145 | LogRel(("Guest Additions update found! Please upgrade this machine to the latest Guest Additions.\n"));
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| 146 | }
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| 147 | else
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| 148 | {
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| 149 | /* How sad ... */
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| 150 | *pfUpdate = false;
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| 151 | }
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| 152 | }
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| 153 |
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| 154 | /* Cleanup on failure */
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| 155 | if (RT_FAILURE(rc))
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| 156 | {
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| 157 | if (*ppszHostVersion)
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| 158 | {
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| 159 | VbglR3GuestPropReadValueFree(*ppszHostVersion);
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| 160 | *ppszHostVersion = NULL;
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| 161 | }
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| 162 | if (*ppszGuestVersion)
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| 163 | {
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| 164 | VbglR3GuestPropReadValueFree(*ppszGuestVersion);
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| 165 | *ppszGuestVersion = NULL;
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| 166 | }
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| 167 | }
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| 168 | return rc;
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| 169 | #else /* !VBOX_WITH_GUEST_PROPS */
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| 170 | RT_NOREF(idClient, pfUpdate, ppszHostVersion, ppszGuestVersion);
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| 171 | return VERR_NOT_SUPPORTED;
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| 172 | #endif
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| 173 | }
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| 174 |
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| 175 |
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| 176 | /** Retrieves the last checked host version.
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| 177 | *
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| 178 | * @returns VBox status code.
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| 179 | *
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| 180 | * @param idClient The client id returned by VbglR3InfoSvcConnect().
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| 181 | * @param ppszVer Receives pointer of allocated version string.
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| 182 | * The returned pointer must be freed using RTStrFree() on VINF_SUCCESS.
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| 183 | */
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| 184 | VBGLR3DECL(int) VbglR3HostVersionLastCheckedLoad(HGCMCLIENTID idClient, char **ppszVer)
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| 185 | {
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| 186 | #ifdef VBOX_WITH_GUEST_PROPS
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| 187 | Assert(idClient > 0);
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| 188 | AssertPtr(ppszVer);
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| 189 | return VbglR3GuestPropReadValueAlloc(idClient, "/VirtualBox/GuestAdd/HostVerLastChecked", ppszVer);
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| 190 | #else /* !VBOX_WITH_GUEST_PROPS */
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| 191 | RT_NOREF(idClient, ppszVer);
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| 192 | return VERR_NOT_SUPPORTED;
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| 193 | #endif
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| 194 | }
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| 195 |
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| 196 |
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| 197 | /** Stores the last checked host version for later lookup.
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| 198 | * Requires strings in form of "majorVer.minorVer.build".
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| 199 | *
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| 200 | * @returns VBox status code.
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| 201 | *
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| 202 | * @param idClient The client id returned by VbglR3InfoSvcConnect().
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| 203 | * @param pszVer Pointer to version string to store.
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| 204 | */
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| 205 | VBGLR3DECL(int) VbglR3HostVersionLastCheckedStore(HGCMCLIENTID idClient, const char *pszVer)
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| 206 | {
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| 207 | #ifdef VBOX_WITH_GUEST_PROPS
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| 208 | Assert(idClient > 0);
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| 209 | AssertPtr(pszVer);
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| 210 | return VbglR3GuestPropWriteValue(idClient, "/VirtualBox/GuestAdd/HostVerLastChecked", pszVer);
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| 211 | #else /* !VBOX_WITH_GUEST_PROPS */
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| 212 | RT_NOREF(idClient, pszVer);
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| 213 | return VERR_NOT_SUPPORTED;
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| 214 | #endif
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| 215 | }
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| 216 |
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