123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131 |
- /* Copyright (C) 2017 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
- *
- * You can redistribute this program and/or modify it under the terms of
- * the GNU Lesser Public License as published by the Free Software Foundation,
- * either version 3 of the License, or (at your option) any later version.
- */
- using System;
- using System.Collections.Generic;
- using Utilities;
- namespace SMBLibrary
- {
- public enum FileAction : uint
- {
- Added = 0x00000001, // FILE_ACTION_ADDED
- Removed = 0x00000002, // FILE_ACTION_REMOVED
- Modified = 0x00000003, // FILE_ACTION_MODIFIED
- RenamedOldName = 0x00000004, // FILE_ACTION_RENAMED_OLD_NAME
- RenamedNewName = 0x00000005, // FILE_ACTION_RENAMED_NEW_NAME
- AddedStream = 0x00000006, // FILE_ACTION_ADDED_STREAM
- RemovedStream = 0x00000007, // FILE_ACTION_REMOVED_STREAM
- ModifiedStream = 0x00000008, // FILE_ACTION_MODIFIED_STREAM
- RemovedByDelete = 0x00000009, // FILE_ACTION_REMOVED_BY_DELETE
- IDNotTunneled = 0x0000000A, // FILE_ACTION_ID_NOT_TUNNELLED
- TunneledIDCollision = 0x0000000B, // FILE_ACTION_TUNNELLED_ID_COLLISION
- }
- /// <summary>
- /// [MS-FSCC] 2.4.42 - FileNotifyInformation
- /// </summary>
- public class FileNotifyInformation
- {
- public const int FixedLength = 12;
- public uint NextEntryOffset;
- public FileAction Action;
- private uint FileNameLength;
- public string FileName;
- public FileNotifyInformation()
- {
- FileName = String.Empty;
- }
- public FileNotifyInformation(byte[] buffer, int offset)
- {
- NextEntryOffset = LittleEndianConverter.ToUInt32(buffer, offset + 0);
- Action = (FileAction)LittleEndianConverter.ToUInt32(buffer, offset + 4);
- FileNameLength = LittleEndianConverter.ToUInt32(buffer, offset + 8);
- FileName = ByteReader.ReadUTF16String(buffer, offset + 12, (int)(FileNameLength / 2));
- }
- public void WriteBytes(byte[] buffer, int offset)
- {
- FileNameLength = (uint)(FileName.Length * 2);
- LittleEndianWriter.WriteUInt32(buffer, offset + 0, NextEntryOffset);
- LittleEndianWriter.WriteUInt32(buffer, offset + 4, (uint)Action);
- LittleEndianWriter.WriteUInt32(buffer, offset + 8, FileNameLength);
- ByteWriter.WriteUTF16String(buffer, offset + 12, FileName);
- }
- public int Length
- {
- get
- {
- return FixedLength + FileName.Length * 2;
- }
- }
- public static List<FileNotifyInformation> ReadList(byte[] buffer, int offset)
- {
- List<FileNotifyInformation> result = new List<FileNotifyInformation>();
- FileNotifyInformation entry;
- do
- {
- entry = new FileNotifyInformation(buffer, offset);
- result.Add(entry);
- offset += (int)entry.NextEntryOffset;
- }
- while (entry.NextEntryOffset != 0);
- return result;
- }
- public static byte[] GetBytes(List<FileNotifyInformation> notifyInformationList)
- {
- int listLength = GetListLength(notifyInformationList);
- byte[] buffer = new byte[listLength];
- int offset = 0;
- for (int index = 0; index < notifyInformationList.Count; index++)
- {
- FileNotifyInformation entry = notifyInformationList[index];
- int length = entry.Length;
- int paddedLength = (int)Math.Ceiling((double)length / 4) * 4;
- if (index < notifyInformationList.Count - 1)
- {
- entry.NextEntryOffset = (uint)paddedLength;
- }
- else
- {
- entry.NextEntryOffset = 0;
- }
- entry.WriteBytes(buffer, offset);
- offset += paddedLength;
- }
- return buffer;
- }
- public static int GetListLength(List<FileNotifyInformation> notifyInformationList)
- {
- int result = 0;
- for (int index = 0; index < notifyInformationList.Count; index++)
- {
- FileNotifyInformation entry = notifyInformationList[index];
- int length = entry.Length;
- // [MS-FSCC] NextEntryOffset MUST always be an integral multiple of 4.
- // The FileName array MUST be padded to the next 4-byte boundary counted from the beginning of the structure.
- if (index < notifyInformationList.Count - 1)
- {
- // No padding is required following the last data element.
- int paddedLength = (int)Math.Ceiling((double)length / 4) * 4;
- result += paddedLength;
- }
- else
- {
- result += length;
- }
- }
- return result;
- }
- }
- }
|