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Added FileNotifyInformation implementation

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Tal Aloni 2017-02-22 20:41:19 +02:00
parent 0ecf8089e1
commit ae50cac87b
2 changed files with 132 additions and 0 deletions
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131
SMBLibrary/NTFileStore/Structures/FileNotifyInformation.cs Normal file
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/* 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;
}
}
}

1
SMBLibrary/SMBLibrary.csproj
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@ -144,6 +144,7 @@
<Compile Include="NTFileStore\Structures\FileInformation\Set\FileLinkInformationType2.cs" />
<Compile Include="NTFileStore\Structures\FileInformation\Set\FileRenameInformationType2.cs" />
<Compile Include="NTFileStore\Structures\FileInformation\Set\FileValidDataLengthInformation.cs" />
<Compile Include="NTFileStore\Structures\FileNotifyInformation.cs" />
<Compile Include="NTFileStore\Structures\FileSystemInformation\FileFsAttributeInformation.cs" />
<Compile Include="NTFileStore\Structures\FileSystemInformation\FileFsControlInformation.cs" />
<Compile Include="NTFileStore\Structures\FileSystemInformation\FileFsDeviceInformation.cs" />