| 1 | /* $Id: vbsfhlp.c 55401 2015-04-23 10:03:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * VirtualBox Windows Guest Shared Folders
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| 5 | *
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| 6 | * File System Driver system helpers
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| 7 | */
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| 8 |
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| 9 | /*
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| 10 | * Copyright (C) 2012 Oracle Corporation
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| 11 | *
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| 12 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 13 | * available from http://www.virtualbox.org. This file is free software;
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| 14 | * you can redistribute it and/or modify it under the terms of the GNU
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| 15 | * General Public License (GPL) as published by the Free Software
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| 16 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 17 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 18 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 19 | */
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| 20 |
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| 21 | #include <ntifs.h>
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| 22 | #include <ntdddisk.h>
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| 23 |
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| 24 | #include "vbsfhlp.h"
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| 25 |
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| 26 | #ifdef DEBUG
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| 27 | static int s_iAllocRefCount = 0;
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| 28 | #endif
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| 29 |
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| 30 | void vbsfHlpSleep (ULONG ulMillies)
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| 31 | {
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| 32 | KEVENT event;
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| 33 | LARGE_INTEGER dueTime;
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| 34 |
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| 35 | KeInitializeEvent(&event, NotificationEvent, FALSE);
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| 36 |
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| 37 | dueTime.QuadPart = -10000 * (int)ulMillies;
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| 38 |
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| 39 | KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, &dueTime);
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| 40 | }
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| 41 |
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| 42 | /**
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| 43 | * Convert VBox IRT file attributes to NT file attributes
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| 44 | *
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| 45 | * @returns NT file attributes
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| 46 | * @param fMode IRT file attributes
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| 47 | *
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| 48 | */
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| 49 | uint32_t VBoxToNTFileAttributes (uint32_t fMode)
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| 50 | {
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| 51 | uint32_t FileAttributes = 0;
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| 52 |
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| 53 | if (fMode & RTFS_DOS_READONLY)
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| 54 | FileAttributes |= FILE_ATTRIBUTE_READONLY;
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| 55 | if (fMode & RTFS_DOS_HIDDEN)
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| 56 | FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
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| 57 | if (fMode & RTFS_DOS_SYSTEM)
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| 58 | FileAttributes |= FILE_ATTRIBUTE_SYSTEM;
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| 59 | if (fMode & RTFS_DOS_DIRECTORY)
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| 60 | FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
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| 61 | if (fMode & RTFS_DOS_ARCHIVED)
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| 62 | FileAttributes |= FILE_ATTRIBUTE_ARCHIVE;
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| 63 | if (fMode & RTFS_DOS_NT_TEMPORARY)
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| 64 | FileAttributes |= FILE_ATTRIBUTE_TEMPORARY;
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| 65 | if (fMode & RTFS_DOS_NT_SPARSE_FILE)
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| 66 | FileAttributes |= FILE_ATTRIBUTE_SPARSE_FILE;
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| 67 | if (fMode & RTFS_DOS_NT_REPARSE_POINT)
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| 68 | FileAttributes |= FILE_ATTRIBUTE_REPARSE_POINT;
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| 69 | if (fMode & RTFS_DOS_NT_COMPRESSED)
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| 70 | FileAttributes |= FILE_ATTRIBUTE_COMPRESSED;
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| 71 | /* if (fMode & RTFS_DOS_NT_OFFLINE) */
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| 72 | if (fMode & RTFS_DOS_NT_NOT_CONTENT_INDEXED)
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| 73 | FileAttributes |= FILE_ATTRIBUTE_NOT_CONTENT_INDEXED;
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| 74 | if (fMode & RTFS_DOS_NT_ENCRYPTED)
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| 75 | FileAttributes |= FILE_ATTRIBUTE_ENCRYPTED;
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| 76 | if (fMode & RTFS_DOS_NT_NORMAL)
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| 77 | {
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| 78 | FileAttributes |= FILE_ATTRIBUTE_NORMAL;
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| 79 | }
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| 80 | return FileAttributes;
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| 81 | }
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| 82 |
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| 83 | /**
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| 84 | * Convert VBox IRT file attributes to NT file attributes
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| 85 | *
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| 86 | * @returns NT file attributes
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| 87 | * @param fMode IRT file attributes
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| 88 | *
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| 89 | */
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| 90 | uint32_t NTToVBoxFileAttributes (uint32_t fMode)
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| 91 | {
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| 92 | uint32_t FileAttributes = 0;
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| 93 |
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| 94 | if (fMode & FILE_ATTRIBUTE_READONLY)
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| 95 | FileAttributes |= RTFS_DOS_READONLY;
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| 96 | if (fMode & FILE_ATTRIBUTE_HIDDEN)
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| 97 | FileAttributes |= RTFS_DOS_HIDDEN;
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| 98 | if (fMode & FILE_ATTRIBUTE_SYSTEM)
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| 99 | FileAttributes |= RTFS_DOS_SYSTEM;
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| 100 | if (fMode & FILE_ATTRIBUTE_DIRECTORY)
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| 101 | FileAttributes |= RTFS_DOS_DIRECTORY;
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| 102 | if (fMode & FILE_ATTRIBUTE_ARCHIVE)
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| 103 | FileAttributes |= RTFS_DOS_ARCHIVED;
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| 104 | if (fMode & FILE_ATTRIBUTE_TEMPORARY)
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| 105 | FileAttributes |= RTFS_DOS_NT_TEMPORARY;
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| 106 | if (fMode & FILE_ATTRIBUTE_SPARSE_FILE)
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| 107 | FileAttributes |= RTFS_DOS_NT_SPARSE_FILE;
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| 108 | if (fMode & FILE_ATTRIBUTE_REPARSE_POINT)
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| 109 | FileAttributes |= RTFS_DOS_NT_REPARSE_POINT;
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| 110 | if (fMode & FILE_ATTRIBUTE_COMPRESSED)
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| 111 | FileAttributes |= RTFS_DOS_NT_COMPRESSED;
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| 112 | if (fMode & FILE_ATTRIBUTE_NOT_CONTENT_INDEXED)
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| 113 | FileAttributes |= RTFS_DOS_NT_NOT_CONTENT_INDEXED;
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| 114 | if (fMode & FILE_ATTRIBUTE_ENCRYPTED)
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| 115 | FileAttributes |= RTFS_DOS_NT_ENCRYPTED;
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| 116 | if (fMode & FILE_ATTRIBUTE_NORMAL)
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| 117 | {
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| 118 | FileAttributes |= RTFS_DOS_NT_NORMAL;
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| 119 | }
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| 120 | return FileAttributes;
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| 121 | }
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| 122 |
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| 123 | NTSTATUS vbsfHlpCreateDriveLetter (WCHAR Letter, UNICODE_STRING *pDeviceName)
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| 124 | {
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| 125 | UNICODE_STRING driveName;
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| 126 | RtlInitUnicodeString(&driveName,L"\\??\\_:" );
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| 127 |
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| 128 | /* Replace '_' with actual drive letter */
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| 129 | driveName.Buffer[driveName.Length/sizeof(WCHAR) - 2] = Letter;
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| 130 |
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| 131 | return IoCreateSymbolicLink (&driveName, pDeviceName);
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| 132 | }
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| 133 |
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| 134 | NTSTATUS vbsfHlpDeleteDriveLetter (WCHAR Letter)
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| 135 | {
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| 136 | UNICODE_STRING driveName;
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| 137 | RtlInitUnicodeString(&driveName,L"\\??\\_:" );
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| 138 |
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| 139 | /* Replace '_' with actual drive letter */
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| 140 | driveName.Buffer[driveName.Length/sizeof(WCHAR) - 2] = Letter;
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| 141 |
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| 142 | return IoDeleteSymbolicLink (&driveName);
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| 143 | }
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| 144 |
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| 145 | /**
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| 146 | * Convert VBox error code to NT status code
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| 147 | *
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| 148 | * @returns NT status code
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| 149 | * @param vboxRC VBox error code
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| 150 | *
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| 151 | */
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| 152 | NTSTATUS VBoxErrorToNTStatus (int vboxRC)
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| 153 | {
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| 154 | NTSTATUS Status;
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| 155 |
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| 156 | switch (vboxRC)
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| 157 | {
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| 158 | case VINF_SUCCESS:
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| 159 | Status = STATUS_SUCCESS;
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| 160 | break;
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| 161 |
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| 162 | case VERR_ACCESS_DENIED:
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| 163 | Status = STATUS_ACCESS_DENIED;
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| 164 | break;
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| 165 |
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| 166 | case VERR_NO_MORE_FILES:
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| 167 | Status = STATUS_NO_MORE_FILES;
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| 168 | break;
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| 169 |
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| 170 | case VERR_PATH_NOT_FOUND:
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| 171 | Status = STATUS_OBJECT_PATH_NOT_FOUND;
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| 172 | break;
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| 173 |
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| 174 | case VERR_FILE_NOT_FOUND:
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| 175 | Status = STATUS_OBJECT_NAME_NOT_FOUND;
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| 176 | break;
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| 177 |
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| 178 | case VERR_DIR_NOT_EMPTY:
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| 179 | Status = STATUS_DIRECTORY_NOT_EMPTY;
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| 180 | break;
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| 181 |
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| 182 | case VERR_SHARING_VIOLATION:
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| 183 | Status = STATUS_SHARING_VIOLATION;
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| 184 | break;
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| 185 |
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| 186 | case VERR_FILE_LOCK_VIOLATION:
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| 187 | Status = STATUS_FILE_LOCK_CONFLICT;
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| 188 | break;
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| 189 |
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| 190 | case VERR_FILE_LOCK_FAILED:
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| 191 | Status = STATUS_LOCK_NOT_GRANTED;
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| 192 | break;
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| 193 |
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| 194 | case VINF_BUFFER_OVERFLOW:
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| 195 | Status = STATUS_BUFFER_OVERFLOW;
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| 196 | break;
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| 197 |
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| 198 | case VERR_EOF:
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| 199 | case VINF_EOF:
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| 200 | Status = STATUS_END_OF_FILE;
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| 201 | break;
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| 202 |
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| 203 | case VERR_READ_ERROR:
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| 204 | case VERR_WRITE_ERROR:
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| 205 | case VERR_FILE_IO_ERROR:
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| 206 | Status = STATUS_UNEXPECTED_IO_ERROR;
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| 207 | break;
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| 208 |
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| 209 | case VERR_WRITE_PROTECT:
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| 210 | Status = STATUS_MEDIA_WRITE_PROTECTED;
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| 211 | break;
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| 212 |
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| 213 | case VERR_ALREADY_EXISTS:
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| 214 | Status = STATUS_OBJECT_NAME_COLLISION;
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| 215 | break;
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| 216 |
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| 217 | case VERR_NOT_A_DIRECTORY:
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| 218 | Status = STATUS_NOT_A_DIRECTORY;
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| 219 | break;
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| 220 |
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| 221 | case VERR_SEEK:
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| 222 | Status = STATUS_INVALID_PARAMETER;
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| 223 | break;
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| 224 |
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| 225 | case VERR_INVALID_PARAMETER:
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| 226 | Status = STATUS_INVALID_PARAMETER;
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| 227 | break;
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| 228 |
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| 229 | case VERR_NOT_SUPPORTED:
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| 230 | Status = STATUS_NOT_SUPPORTED;
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| 231 | break;
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| 232 |
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| 233 | default:
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| 234 | /* @todo error handling */
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| 235 | Status = STATUS_INVALID_PARAMETER;
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| 236 | Log(("Unexpected vbox error %Rrc\n",
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| 237 | vboxRC));
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| 238 | break;
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| 239 | }
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| 240 | return Status;
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| 241 | }
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| 242 |
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| 243 | PVOID vbsfAllocNonPagedMem (ULONG ulSize)
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| 244 | {
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| 245 | PVOID pMemory = NULL;
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| 246 |
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| 247 | #ifdef DEBUG
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| 248 | s_iAllocRefCount = s_iAllocRefCount + 1;
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| 249 | Log(("vbsfAllocNonPagedMem: RefCnt after incrementing: %d\n", s_iAllocRefCount));
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| 250 | #endif
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| 251 |
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| 252 | /* Tag is reversed (a.k.a "SHFL") to display correctly in debuggers, so search for "SHFL" */
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| 253 | pMemory = ExAllocatePoolWithTag(NonPagedPool, ulSize, 'LFHS');
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| 254 |
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| 255 | if (NULL != pMemory)
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| 256 | {
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| 257 | RtlZeroMemory(pMemory, ulSize);
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| 258 | #ifdef DEBUG
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| 259 | Log(("vbsfAllocNonPagedMem: Allocated %d bytes of memory at %p.\n", ulSize, pMemory));
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| 260 | #endif
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| 261 | }
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| 262 | else
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| 263 | {
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| 264 | #ifdef DEBUG
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| 265 | Log(("vbsfAllocNonPagedMem: ERROR: Could not allocate %d bytes of memory!\n", ulSize));
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| 266 | #endif
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| 267 | }
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| 268 |
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| 269 | return pMemory;
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| 270 | }
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| 271 |
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| 272 | void vbsfFreeNonPagedMem (PVOID lpMem)
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| 273 | {
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| 274 | #ifdef DEBUG
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| 275 | s_iAllocRefCount = s_iAllocRefCount - 1;
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| 276 | Log(("vbsfFreeNonPagedMem: RefCnt after decrementing: %d\n", s_iAllocRefCount));
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| 277 | #endif
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| 278 |
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| 279 | Assert(lpMem);
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| 280 |
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| 281 | /* MSDN: The ExFreePoolWithTag routine issues a bug check if the specified value for Tag does not match the tag value passed
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| 282 | to the routine that originally allocated the memory block. Otherwise, the behavior of this routine is identical to ExFreePool. */
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| 283 | ExFreePoolWithTag(lpMem, 'LFHS');
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| 284 | lpMem = NULL;
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| 285 | }
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| 286 |
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| 287 | #if 0 //def DEBUG
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| 288 | /**
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| 289 | * Callback for RTLogFormatV which writes to the backdoor.
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| 290 | * See PFNLOGOUTPUT() for details.
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| 291 | */
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| 292 | static DECLCALLBACK(size_t) rtLogBackdoorOutput(void *pv, const char *pachChars, size_t cbChars)
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| 293 | {
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| 294 | RTLogWriteUser(pachChars, cbChars);
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| 295 | return cbChars;
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| 296 | }
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| 297 |
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| 298 | int RTLogBackdoorPrintf1(const char *pszFormat, ...)
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| 299 | {
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| 300 | va_list args;
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| 301 |
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| 302 | LARGE_INTEGER time;
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| 303 |
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| 304 | KeQueryTickCount(&time);
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| 305 |
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| 306 | RTLogBackdoorPrintf("T=%RX64 ", time.QuadPart);
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| 307 | va_start(args, pszFormat);
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| 308 | RTLogFormatV(rtLogBackdoorOutput, NULL, pszFormat, args);
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| 309 | va_end(args);
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| 310 |
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| 311 | return 0;
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| 312 | }
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| 313 | #endif
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| 314 |
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| 315 | #if defined(DEBUG) || defined (LOG_ENABLED)
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| 316 | static PCHAR PnPMinorFunctionString(LONG MinorFunction)
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| 317 | {
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| 318 | switch (MinorFunction)
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| 319 | {
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| 320 | case IRP_MN_START_DEVICE:
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| 321 | return "IRP_MJ_PNP - IRP_MN_START_DEVICE";
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| 322 | case IRP_MN_QUERY_REMOVE_DEVICE:
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| 323 | return "IRP_MJ_PNP - IRP_MN_QUERY_REMOVE_DEVICE";
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| 324 | case IRP_MN_REMOVE_DEVICE:
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| 325 | return "IRP_MJ_PNP - IRP_MN_REMOVE_DEVICE";
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| 326 | case IRP_MN_CANCEL_REMOVE_DEVICE:
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| 327 | return "IRP_MJ_PNP - IRP_MN_CANCEL_REMOVE_DEVICE";
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| 328 | case IRP_MN_STOP_DEVICE:
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| 329 | return "IRP_MJ_PNP - IRP_MN_STOP_DEVICE";
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| 330 | case IRP_MN_QUERY_STOP_DEVICE:
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| 331 | return "IRP_MJ_PNP - IRP_MN_QUERY_STOP_DEVICE";
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| 332 | case IRP_MN_CANCEL_STOP_DEVICE:
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| 333 | return "IRP_MJ_PNP - IRP_MN_CANCEL_STOP_DEVICE";
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| 334 | case IRP_MN_QUERY_DEVICE_RELATIONS:
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| 335 | return "IRP_MJ_PNP - IRP_MN_QUERY_DEVICE_RELATIONS";
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| 336 | case IRP_MN_QUERY_INTERFACE:
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| 337 | return "IRP_MJ_PNP - IRP_MN_QUERY_INTERFACE";
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| 338 | case IRP_MN_QUERY_CAPABILITIES:
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| 339 | return "IRP_MJ_PNP - IRP_MN_QUERY_CAPABILITIES";
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| 340 | case IRP_MN_QUERY_RESOURCES:
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| 341 | return "IRP_MJ_PNP - IRP_MN_QUERY_RESOURCES";
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| 342 | case IRP_MN_QUERY_RESOURCE_REQUIREMENTS:
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| 343 | return "IRP_MJ_PNP - IRP_MN_QUERY_RESOURCE_REQUIREMENTS";
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| 344 | case IRP_MN_QUERY_DEVICE_TEXT:
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| 345 | return "IRP_MJ_PNP - IRP_MN_QUERY_DEVICE_TEXT";
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| 346 | case IRP_MN_FILTER_RESOURCE_REQUIREMENTS:
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| 347 | return "IRP_MJ_PNP - IRP_MN_FILTER_RESOURCE_REQUIREMENTS";
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| 348 | case IRP_MN_READ_CONFIG:
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| 349 | return "IRP_MJ_PNP - IRP_MN_READ_CONFIG";
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| 350 | case IRP_MN_WRITE_CONFIG:
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| 351 | return "IRP_MJ_PNP - IRP_MN_WRITE_CONFIG";
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| 352 | case IRP_MN_EJECT:
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| 353 | return "IRP_MJ_PNP - IRP_MN_EJECT";
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| 354 | case IRP_MN_SET_LOCK:
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| 355 | return "IRP_MJ_PNP - IRP_MN_SET_LOCK";
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| 356 | case IRP_MN_QUERY_ID:
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| 357 | return "IRP_MJ_PNP - IRP_MN_QUERY_ID";
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| 358 | case IRP_MN_QUERY_PNP_DEVICE_STATE:
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| 359 | return "IRP_MJ_PNP - IRP_MN_QUERY_PNP_DEVICE_STATE";
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| 360 | case IRP_MN_QUERY_BUS_INFORMATION:
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| 361 | return "IRP_MJ_PNP - IRP_MN_QUERY_BUS_INFORMATION";
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| 362 | case IRP_MN_DEVICE_USAGE_NOTIFICATION:
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| 363 | return "IRP_MJ_PNP - IRP_MN_DEVICE_USAGE_NOTIFICATION";
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| 364 | case IRP_MN_SURPRISE_REMOVAL:
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| 365 | return "IRP_MJ_PNP - IRP_MN_SURPRISE_REMOVAL";
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| 366 | default:
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| 367 | return "IRP_MJ_PNP - unknown_pnp_irp";
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| 368 | }
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| 369 | }
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| 370 |
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| 371 | PCHAR MajorFunctionString(UCHAR MajorFunction, LONG MinorFunction)
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| 372 | {
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| 373 | switch (MinorFunction)
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| 374 | {
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| 375 | case IRP_MJ_CREATE:
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| 376 | return "IRP_MJ_CREATE";
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| 377 | case IRP_MJ_CREATE_NAMED_PIPE:
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| 378 | return "IRP_MJ_CREATE_NAMED_PIPE";
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| 379 | case IRP_MJ_CLOSE:
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| 380 | return "IRP_MJ_CLOSE";
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| 381 | case IRP_MJ_READ:
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| 382 | return "IRP_MJ_READ";
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| 383 | case IRP_MJ_WRITE:
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| 384 | return "IRP_MJ_WRITE";
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| 385 | case IRP_MJ_QUERY_INFORMATION:
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| 386 | return "IRP_MJ_QUERY_INFORMATION";
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| 387 | case IRP_MJ_SET_INFORMATION:
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| 388 | return "IRP_MJ_SET_INFORMATION";
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| 389 | case IRP_MJ_QUERY_EA:
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| 390 | return "IRP_MJ_QUERY_EA";
|
|---|
| 391 | case IRP_MJ_SET_EA:
|
|---|
| 392 | return "IRP_MJ_SET_EA";
|
|---|
| 393 | case IRP_MJ_FLUSH_BUFFERS:
|
|---|
| 394 | return "IRP_MJ_FLUSH_BUFFERS";
|
|---|
| 395 | case IRP_MJ_QUERY_VOLUME_INFORMATION:
|
|---|
| 396 | return "IRP_MJ_QUERY_VOLUME_INFORMATION";
|
|---|
| 397 | case IRP_MJ_SET_VOLUME_INFORMATION:
|
|---|
| 398 | return "IRP_MJ_SET_VOLUME_INFORMATION";
|
|---|
| 399 | case IRP_MJ_DIRECTORY_CONTROL:
|
|---|
| 400 | return "IRP_MJ_DIRECTORY_CONTROL";
|
|---|
| 401 | case IRP_MJ_FILE_SYSTEM_CONTROL:
|
|---|
| 402 | return "IRP_MJ_FILE_SYSTEM_CONTROL";
|
|---|
| 403 | case IRP_MJ_DEVICE_CONTROL:
|
|---|
| 404 | return "IRP_MJ_DEVICE_CONTROL";
|
|---|
| 405 | case IRP_MJ_INTERNAL_DEVICE_CONTROL:
|
|---|
| 406 | return "IRP_MJ_INTERNAL_DEVICE_CONTROL";
|
|---|
| 407 | case IRP_MJ_SHUTDOWN:
|
|---|
| 408 | return "IRP_MJ_SHUTDOWN";
|
|---|
| 409 | case IRP_MJ_LOCK_CONTROL:
|
|---|
| 410 | return "IRP_MJ_LOCK_CONTROL";
|
|---|
| 411 | case IRP_MJ_CLEANUP:
|
|---|
| 412 | return "IRP_MJ_CLEANUP";
|
|---|
| 413 | case IRP_MJ_CREATE_MAILSLOT:
|
|---|
| 414 | return "IRP_MJ_CREATE_MAILSLOT";
|
|---|
| 415 | case IRP_MJ_QUERY_SECURITY:
|
|---|
| 416 | return "IRP_MJ_QUERY_SECURITY";
|
|---|
| 417 | case IRP_MJ_SET_SECURITY:
|
|---|
| 418 | return "IRP_MJ_SET_SECURITY";
|
|---|
| 419 | case IRP_MJ_POWER:
|
|---|
| 420 | return "IRP_MJ_POWER";
|
|---|
| 421 | case IRP_MJ_SYSTEM_CONTROL:
|
|---|
| 422 | return "IRP_MJ_SYSTEM_CONTROL";
|
|---|
| 423 | case IRP_MJ_DEVICE_CHANGE:
|
|---|
| 424 | return "IRP_MJ_DEVICE_CHANGE";
|
|---|
| 425 | case IRP_MJ_QUERY_QUOTA:
|
|---|
| 426 | return "IRP_MJ_QUERY_QUOTA";
|
|---|
| 427 | case IRP_MJ_SET_QUOTA:
|
|---|
| 428 | return "IRP_MJ_SET_QUOTA";
|
|---|
| 429 | case IRP_MJ_PNP:
|
|---|
| 430 | return PnPMinorFunctionString(MinorFunction);
|
|---|
| 431 |
|
|---|
| 432 | default:
|
|---|
| 433 | return "unknown_pnp_irp";
|
|---|
| 434 | }
|
|---|
| 435 | }
|
|---|
| 436 | #endif
|
|---|
| 437 |
|
|---|
| 438 | /** Allocate and initialize a SHFLSTRING from a UNICODE string.
|
|---|
| 439 | *
|
|---|
| 440 | * @param ppShflString Where to store the pointer to the allocated SHFLSTRING structure.
|
|---|
| 441 | * The structure must be deallocated with vbsfFreeNonPagedMem.
|
|---|
| 442 | * @param pwc The UNICODE string. If NULL then SHFL is only allocated.
|
|---|
| 443 | * @param cb Size of the UNICODE string in bytes without the trailing nul.
|
|---|
| 444 | *
|
|---|
| 445 | * @return Status code.
|
|---|
| 446 | */
|
|---|
| 447 | NTSTATUS vbsfShflStringFromUnicodeAlloc(PSHFLSTRING *ppShflString, const WCHAR *pwc, uint16_t cb)
|
|---|
| 448 | {
|
|---|
| 449 | NTSTATUS Status = STATUS_SUCCESS;
|
|---|
| 450 |
|
|---|
| 451 | PSHFLSTRING pShflString;
|
|---|
| 452 | ULONG ulShflStringSize;
|
|---|
| 453 |
|
|---|
| 454 | /* Calculate length required for the SHFL structure: header + chars + nul. */
|
|---|
| 455 | ulShflStringSize = SHFLSTRING_HEADER_SIZE + cb + sizeof(WCHAR);
|
|---|
| 456 | pShflString = (PSHFLSTRING)vbsfAllocNonPagedMem(ulShflStringSize);
|
|---|
| 457 | if (pShflString)
|
|---|
| 458 | {
|
|---|
| 459 | if (ShflStringInitBuffer(pShflString, ulShflStringSize))
|
|---|
| 460 | {
|
|---|
| 461 | if (pwc)
|
|---|
| 462 | {
|
|---|
| 463 | RtlCopyMemory(pShflString->String.ucs2, pwc, cb);
|
|---|
| 464 | pShflString->String.ucs2[cb / sizeof(WCHAR)] = 0;
|
|---|
| 465 | pShflString->u16Length = cb; /* without terminating null */
|
|---|
| 466 | AssertMsg(pShflString->u16Length + sizeof(WCHAR) == pShflString->u16Size,
|
|---|
| 467 | ("u16Length %d, u16Size %d\n", pShflString->u16Length, pShflString->u16Size));
|
|---|
| 468 | }
|
|---|
| 469 | else
|
|---|
| 470 | {
|
|---|
| 471 | RtlZeroMemory(pShflString->String.ucs2, cb + sizeof(WCHAR));
|
|---|
| 472 | pShflString->u16Length = 0; /* without terminating null */
|
|---|
| 473 | AssertMsg(pShflString->u16Size >= sizeof(WCHAR),
|
|---|
| 474 | ("u16Size %d\n", pShflString->u16Size));
|
|---|
| 475 | }
|
|---|
| 476 |
|
|---|
| 477 | *ppShflString = pShflString;
|
|---|
| 478 | }
|
|---|
| 479 | else
|
|---|
| 480 | {
|
|---|
| 481 | vbsfFreeNonPagedMem(pShflString);
|
|---|
| 482 | Status = STATUS_INSUFFICIENT_RESOURCES;
|
|---|
| 483 | }
|
|---|
| 484 | }
|
|---|
| 485 | else
|
|---|
| 486 | {
|
|---|
| 487 | Status = STATUS_INSUFFICIENT_RESOURCES;
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | return Status;
|
|---|
| 491 | }
|
|---|
