SMBLibrary-Fork/SMBLibrary/Client/SMB1FileStore.cs

/* Copyright (C) 2014-2019 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 SMBLibrary.SMB1;
using Utilities;

namespace SMBLibrary.Client
{
    public class SMB1FileStore : ISMBFileStore
    {
        private SMB1Client m_client;
        private ushort m_treeID;

        public SMB1FileStore(SMB1Client client, ushort treeID)
        {
            m_client = client;
            m_treeID = treeID;
        }

        public NTStatus CreateFile(out object handle, out FileStatus fileStatus, string path, AccessMask desiredAccess, FileAttributes fileAttributes, ShareAccess shareAccess, CreateDisposition createDisposition, CreateOptions createOptions, SecurityContext securityContext)
        {
            handle = null;
            fileStatus = FileStatus.FILE_DOES_NOT_EXIST;
            NTCreateAndXRequest request = new NTCreateAndXRequest();
            request.FileName = path;
            request.DesiredAccess = desiredAccess;
            request.ExtFileAttributes = ToExtendedFileAttributes(fileAttributes);
            request.ShareAccess = shareAccess;
            request.CreateDisposition = createDisposition;
            request.CreateOptions = createOptions;
            request.ImpersonationLevel = ImpersonationLevel.Impersonation;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_NT_CREATE_ANDX);
            if (reply != null)
            {
                if (reply.Commands[0] is NTCreateAndXResponse)
                {
                    NTCreateAndXResponse response = reply.Commands[0] as NTCreateAndXResponse;
                    handle = response.FID;
                    fileStatus = ToFileStatus(response.CreateDisposition);
                    return reply.Header.Status;
                }
                else if (reply.Commands[0] is ErrorResponse)
                {
                    return reply.Header.Status;
                }
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus CloseFile(object handle)
        {
            CloseRequest request = new CloseRequest();
            request.FID = (ushort)handle;
            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_CLOSE);
            if (reply != null)
            {
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus ReadFile(out byte[] data, object handle, long offset, int maxCount)
        {
            data = null;
            ReadAndXRequest request = new ReadAndXRequest();
            request.FID = (ushort)handle;
            request.Offset = (ulong)offset;
            request.MaxCountLarge = (uint)maxCount;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_READ_ANDX);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is ReadAndXResponse)
                {
                    data = ((ReadAndXResponse)reply.Commands[0]).Data;
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus WriteFile(out int numberOfBytesWritten, object handle, long offset, byte[] data)
        {
            numberOfBytesWritten = 0;
            WriteAndXRequest request = new WriteAndXRequest();
            request.FID = (ushort)handle;
            request.Offset = (ulong)offset;
            request.Data = data;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_WRITE_ANDX);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is WriteAndXResponse)
                {
                    numberOfBytesWritten = (int)((WriteAndXResponse)reply.Commands[0]).Count;
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus FlushFileBuffers(object handle)
        {
            throw new NotImplementedException();
        }

        public NTStatus LockFile(object handle, long byteOffset, long length, bool exclusiveLock)
        {
            throw new NotImplementedException();
        }

        public NTStatus UnlockFile(object handle, long byteOffset, long length)
        {
            throw new NotImplementedException();
        }

        public NTStatus QueryDirectory(out List<QueryDirectoryFileInformation> result, object handle, string fileName, FileInformationClass informationClass)
        {
            throw new NotImplementedException();
        }

        public NTStatus QueryDirectory(out List<FindInformation> result, string fileName, FindInformationLevel informationLevel)
        {
            result = null;
            int maxOutputLength = 4096;
            Transaction2FindFirst2Request subcommand = new Transaction2FindFirst2Request();
            subcommand.SearchAttributes = SMBFileAttributes.Hidden | SMBFileAttributes.System | SMBFileAttributes.Directory;
            subcommand.SearchCount = UInt16.MaxValue;
            subcommand.Flags = FindFlags.SMB_FIND_CLOSE_AT_EOS;
            subcommand.InformationLevel = informationLevel;
            subcommand.FileName = fileName;

            Transaction2Request request = new Transaction2Request();
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
            request.TransData = subcommand.GetData(m_client.Unicode);
            request.TotalDataCount = (ushort)request.TransData.Length;
            request.TotalParameterCount = (ushort)request.TransParameters.Length;
            request.MaxParameterCount = Transaction2FindFirst2Response.ParametersLength;
            request.MaxDataCount = (ushort)maxOutputLength;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is Transaction2Response)
                {
                    result = new List<FindInformation>();
                    Transaction2Response response = (Transaction2Response)reply.Commands[0];
                    Transaction2FindFirst2Response subcommandResponse = new Transaction2FindFirst2Response(response.TransParameters, response.TransData, reply.Header.UnicodeFlag);
                    FindInformationList findInformationList = subcommandResponse.GetFindInformationList(subcommand.InformationLevel, reply.Header.UnicodeFlag);
                    result.AddRange(findInformationList);
                    bool endOfSearch = subcommandResponse.EndOfSearch;
                    while (!endOfSearch)
                    {
                        Transaction2FindNext2Request nextSubcommand = new Transaction2FindNext2Request();
                        nextSubcommand.SID = subcommandResponse.SID;
                        nextSubcommand.SearchCount = UInt16.MaxValue;
                        nextSubcommand.Flags = FindFlags.SMB_FIND_CLOSE_AT_EOS | FindFlags.SMB_FIND_CONTINUE_FROM_LAST;
                        nextSubcommand.InformationLevel = informationLevel;
                        nextSubcommand.FileName = fileName;

                        request = new Transaction2Request();
                        request.Setup = nextSubcommand.GetSetup();
                        request.TransParameters = nextSubcommand.GetParameters(m_client.Unicode);
                        request.TransData = nextSubcommand.GetData(m_client.Unicode);
                        request.TotalDataCount = (ushort)request.TransData.Length;
                        request.TotalParameterCount = (ushort)request.TransParameters.Length;
                        request.MaxParameterCount = Transaction2FindNext2Response.ParametersLength;
                        request.MaxDataCount = (ushort)maxOutputLength;

                        TrySendMessage(request);
                        reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
                        if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is Transaction2Response)
                        {
                            response = (Transaction2Response)reply.Commands[0];
                            Transaction2FindNext2Response nextSubcommandResponse = new Transaction2FindNext2Response(response.TransParameters, response.TransData, reply.Header.UnicodeFlag);
                            findInformationList = nextSubcommandResponse.GetFindInformationList(subcommand.InformationLevel, reply.Header.UnicodeFlag);
                            result.AddRange(findInformationList);
                            endOfSearch = nextSubcommandResponse.EndOfSearch;
                        }
                        else
                        {
                            endOfSearch = true;
                        }
                    }
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus GetFileInformation(out FileInformation result, object handle, FileInformationClass informationClass)
        {
            result = null;
            if (m_client.InfoLevelPassthrough)
            {
                int maxOutputLength = 4096;
                Transaction2QueryFileInformationRequest subcommand = new Transaction2QueryFileInformationRequest();
                subcommand.FID = (ushort)handle;
                subcommand.FileInformationClass = informationClass;

                Transaction2Request request = new Transaction2Request();
                request.Setup = subcommand.GetSetup();
                request.TransParameters = subcommand.GetParameters(m_client.Unicode);
                request.TransData = subcommand.GetData(m_client.Unicode);
                request.TotalDataCount = (ushort)request.TransData.Length;
                request.TotalParameterCount = (ushort)request.TransParameters.Length;
                request.MaxParameterCount = Transaction2QueryFileInformationResponse.ParametersLength;
                request.MaxDataCount = (ushort)maxOutputLength;

                TrySendMessage(request);
                SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
                if (reply != null)
                {
                    if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is Transaction2Response)
                    {
                        Transaction2Response response = (Transaction2Response)reply.Commands[0];
                        Transaction2QueryFileInformationResponse subcommandResponse = new Transaction2QueryFileInformationResponse(response.TransParameters, response.TransData, reply.Header.UnicodeFlag);
                        if (informationClass == FileInformationClass.FileAllInformation)
                        {
                            // Windows implementations return SMB_QUERY_FILE_ALL_INFO when a client specifies native NT passthrough level "FileAllInformation".
                            QueryInformation queryFileAllInfo = subcommandResponse.GetQueryInformation(QueryInformationLevel.SMB_QUERY_FILE_ALL_INFO);
                            result = QueryInformationHelper.ToFileInformation(queryFileAllInfo);
                        }
                        else
                        {
                            result = subcommandResponse.GetFileInformation(informationClass);
                        }
                    }
                    return reply.Header.Status;
                }
                return NTStatus.STATUS_INVALID_SMB;
            }
            else
            {
                QueryInformationLevel informationLevel = QueryInformationHelper.ToFileInformationLevel(informationClass);
                QueryInformation queryInformation;
                NTStatus status = GetFileInformation(out queryInformation, handle, informationLevel);
                if (status == NTStatus.STATUS_SUCCESS)
                {
                    result = QueryInformationHelper.ToFileInformation(queryInformation);
                }
                return status;
            }
        }

        public NTStatus GetFileInformation(out QueryInformation result, object handle, QueryInformationLevel informationLevel)
        {
            result = null;
            int maxOutputLength = 4096;
            Transaction2QueryFileInformationRequest subcommand = new Transaction2QueryFileInformationRequest();
            subcommand.FID = (ushort)handle;
            subcommand.QueryInformationLevel = informationLevel;

            Transaction2Request request = new Transaction2Request();
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
            request.TransData = subcommand.GetData(m_client.Unicode);
            request.TotalDataCount = (ushort)request.TransData.Length;
            request.TotalParameterCount = (ushort)request.TransParameters.Length;
            request.MaxParameterCount = Transaction2QueryFileInformationResponse.ParametersLength;
            request.MaxDataCount = (ushort)maxOutputLength;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is Transaction2Response)
                {
                    Transaction2Response response = (Transaction2Response)reply.Commands[0];
                    Transaction2QueryFileInformationResponse subcommandResponse = new Transaction2QueryFileInformationResponse(response.TransParameters, response.TransData, reply.Header.UnicodeFlag);
                    result = subcommandResponse.GetQueryInformation(informationLevel);
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus SetFileInformation(object handle, FileInformation information)
        {
            if (m_client.InfoLevelPassthrough)
            {
	            if (information is FileRenameInformationType2)
	            {
	                FileRenameInformationType1 informationType1 = new FileRenameInformationType1();
	                informationType1.FileName = ((FileRenameInformationType2)information).FileName;
	                informationType1.ReplaceIfExists = ((FileRenameInformationType2)information).ReplaceIfExists;
	                informationType1.RootDirectory = (uint)((FileRenameInformationType2)information).RootDirectory;
	                information = informationType1;
	            }
	
	            int maxOutputLength = 4096;
	            Transaction2SetFileInformationRequest subcommand = new Transaction2SetFileInformationRequest();
	            subcommand.FID = (ushort)handle;
	            subcommand.SetInformation(information);
	
	            Transaction2Request request = new Transaction2Request();
	            request.Setup = subcommand.GetSetup();
	            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
	            request.TransData = subcommand.GetData(m_client.Unicode);
	            request.TotalDataCount = (ushort)request.TransData.Length;
	            request.TotalParameterCount = (ushort)request.TransParameters.Length;
	            request.MaxParameterCount = Transaction2SetFileInformationResponse.ParametersLength;
	            request.MaxDataCount = (ushort)maxOutputLength;
	
	            TrySendMessage(request);
	            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
	            if (reply != null)
	            {
	                return reply.Header.Status;
	            }
	            return NTStatus.STATUS_INVALID_SMB;
            }
			else
			{
				throw new NotSupportedException("Server does not support InfoLevelPassthrough");
			}
        }

        public NTStatus SetFileInformation(object handle, SetInformation information)
        {
            int maxOutputLength = 4096;
            Transaction2SetFileInformationRequest subcommand = new Transaction2SetFileInformationRequest();
            subcommand.FID = (ushort)handle;
            subcommand.SetInformation(information);

            Transaction2Request request = new Transaction2Request();
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
            request.TransData = subcommand.GetData(m_client.Unicode);
            request.TotalDataCount = (ushort)request.TransData.Length;
            request.TotalParameterCount = (ushort)request.TransParameters.Length;
            request.MaxParameterCount = Transaction2SetFileInformationResponse.ParametersLength;
            request.MaxDataCount = (ushort)maxOutputLength;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
            if (reply != null)
            {
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus GetFileSystemInformation(out FileSystemInformation result, FileSystemInformationClass informationClass)
        {
            if (m_client.InfoLevelPassthrough)
            {
                result = null;
                int maxOutputLength = 4096;
                Transaction2QueryFSInformationRequest subcommand = new Transaction2QueryFSInformationRequest();
                subcommand.FileSystemInformationClass = informationClass;

                Transaction2Request request = new Transaction2Request();
                request.Setup = subcommand.GetSetup();
                request.TransParameters = subcommand.GetParameters(m_client.Unicode);
                request.TransData = subcommand.GetData(m_client.Unicode);
                request.TotalDataCount = (ushort)request.TransData.Length;
                request.TotalParameterCount = (ushort)request.TransParameters.Length;
                request.MaxParameterCount = Transaction2QueryFSInformationResponse.ParametersLength;
                request.MaxDataCount = (ushort)maxOutputLength;

                TrySendMessage(request);
                SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
                if (reply != null)
                {
                    if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is Transaction2Response)
                    {
                        Transaction2Response response = (Transaction2Response)reply.Commands[0];
                        Transaction2QueryFSInformationResponse subcommandResponse = new Transaction2QueryFSInformationResponse(response.TransParameters, response.TransData, reply.Header.UnicodeFlag);
                        result = subcommandResponse.GetFileSystemInformation(informationClass);
                    }
                    return reply.Header.Status;
                }
                return NTStatus.STATUS_INVALID_SMB;
            }
            else
            {
                throw new NotSupportedException("Server does not support InfoLevelPassthrough");
            }
        }

        public NTStatus GetFileSystemInformation(out QueryFSInformation result, QueryFSInformationLevel informationLevel)
        {
            result = null;
            int maxOutputLength = 4096;
            Transaction2QueryFSInformationRequest subcommand = new Transaction2QueryFSInformationRequest();
            subcommand.QueryFSInformationLevel = informationLevel;

            Transaction2Request request = new Transaction2Request();
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
            request.TransData = subcommand.GetData(m_client.Unicode);
            request.TotalDataCount = (ushort)request.TransData.Length;
            request.TotalParameterCount = (ushort)request.TransParameters.Length;
            request.MaxParameterCount = Transaction2QueryFSInformationResponse.ParametersLength;
            request.MaxDataCount = (ushort)maxOutputLength;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION2);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is Transaction2Response)
                {
                    Transaction2Response response = (Transaction2Response)reply.Commands[0];
                    Transaction2QueryFSInformationResponse subcommandResponse = new Transaction2QueryFSInformationResponse(response.TransParameters, response.TransData, reply.Header.UnicodeFlag);
                    result = subcommandResponse.GetQueryFSInformation(informationLevel, reply.Header.UnicodeFlag);
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus SetFileSystemInformation(FileSystemInformation information)
        {
            throw new NotImplementedException();
        }

        public NTStatus GetSecurityInformation(out SecurityDescriptor result, object handle, SecurityInformation securityInformation)
        {
            result = null;
            int maxOutputLength = 4096;
            NTTransactQuerySecurityDescriptorRequest subcommand = new NTTransactQuerySecurityDescriptorRequest();
            subcommand.FID = (ushort)handle;
            subcommand.SecurityInfoFields = securityInformation;

            NTTransactRequest request = new NTTransactRequest();
            request.Function = subcommand.SubcommandName;
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
            request.TransData = subcommand.GetData();
            request.TotalDataCount = (uint)request.TransData.Length;
            request.TotalParameterCount = (uint)request.TransParameters.Length;
            request.MaxParameterCount = NTTransactQuerySecurityDescriptorResponse.ParametersLength;
            request.MaxDataCount = (uint)maxOutputLength;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_NT_TRANSACT);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is NTTransactResponse)
                {
                    NTTransactResponse response = (NTTransactResponse)reply.Commands[0];
                    NTTransactQuerySecurityDescriptorResponse subcommandResponse = new NTTransactQuerySecurityDescriptorResponse(response.TransParameters, response.TransData);
                    result = subcommandResponse.SecurityDescriptor;
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus SetSecurityInformation(object handle, SecurityInformation securityInformation, SecurityDescriptor securityDescriptor)
        {
            return NTStatus.STATUS_NOT_SUPPORTED;
        }

        public NTStatus NotifyChange(out object ioRequest, object handle, NotifyChangeFilter completionFilter, bool watchTree, int outputBufferSize, OnNotifyChangeCompleted onNotifyChangeCompleted, object context)
        {
            throw new NotImplementedException();
        }

        public NTStatus Cancel(object ioRequest)
        {
            throw new NotImplementedException();
        }

        public NTStatus DeviceIOControl(object handle, uint ctlCode, byte[] input, out byte[] output, int maxOutputLength)
        {
            if ((IoControlCode)ctlCode == IoControlCode.FSCTL_PIPE_TRANSCEIVE)
            {
                return FsCtlPipeTranscieve(handle, input, out output, maxOutputLength);
            }

            output = null;
            NTTransactIOCTLRequest subcommand = new NTTransactIOCTLRequest();
            subcommand.FID = (ushort)handle;
            subcommand.FunctionCode = ctlCode;
            subcommand.IsFsctl = true;
            subcommand.Data = input;

            NTTransactRequest request = new NTTransactRequest();
            request.Function = subcommand.SubcommandName;
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters(m_client.Unicode);
            request.TransData = subcommand.GetData();
            request.TotalDataCount = (uint)request.TransData.Length;
            request.TotalParameterCount = (uint)request.TransParameters.Length;
            request.MaxParameterCount = NTTransactIOCTLResponse.ParametersLength;
            request.MaxDataCount = (uint)maxOutputLength;

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_NT_TRANSACT);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is NTTransactResponse)
                {
                    NTTransactResponse response = (NTTransactResponse)reply.Commands[0];
                    NTTransactIOCTLResponse subcommandResponse = new NTTransactIOCTLResponse(response.Setup, response.TransData);
                    output = subcommandResponse.Data;
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus FsCtlPipeTranscieve(object handle, byte[] input, out byte[] output, int maxOutputLength)
        {
            output = null;
            TransactionTransactNamedPipeRequest subcommand = new TransactionTransactNamedPipeRequest();
            subcommand.FID = (ushort)handle;
            subcommand.WriteData = input;

            TransactionRequest request = new TransactionRequest();
            request.Setup = subcommand.GetSetup();
            request.TransParameters = subcommand.GetParameters();
            request.TransData = subcommand.GetData(m_client.Unicode);
            request.TotalDataCount = (ushort)request.TransData.Length;
            request.TotalParameterCount = (ushort)request.TransParameters.Length;
            request.MaxParameterCount = TransactionTransactNamedPipeResponse.ParametersLength;
            request.MaxDataCount = (ushort)maxOutputLength;
            request.Name = @"\PIPE\";

            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TRANSACTION);
            if (reply != null)
            {
                if (reply.Header.Status == NTStatus.STATUS_SUCCESS && reply.Commands[0] is TransactionResponse)
                {
                    TransactionResponse response = (TransactionResponse)reply.Commands[0];
                    TransactionTransactNamedPipeResponse subcommandResponse = new TransactionTransactNamedPipeResponse(response.TransData);
                    output = subcommandResponse.ReadData;
                }
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        public NTStatus Disconnect()
        {
            TreeDisconnectRequest request = new TreeDisconnectRequest();
            TrySendMessage(request);
            SMB1Message reply = m_client.WaitForMessage(CommandName.SMB_COM_TREE_DISCONNECT);
            if (reply != null)
            {
                return reply.Header.Status;
            }
            return NTStatus.STATUS_INVALID_SMB;
        }

        private void TrySendMessage(SMB1Command request)
        {
            m_client.TrySendMessage(request, m_treeID);
        }

        public uint MaxReadSize
        {
            get
            {
                return m_client.MaxReadSize;
            }
        }

        public uint MaxWriteSize
        {
            get
            {
                return m_client.MaxWriteSize;
            }
        }

        private static ExtendedFileAttributes ToExtendedFileAttributes(FileAttributes fileAttributes)
        {
            // We only return flags that can be used with NtCreateFile
            ExtendedFileAttributes extendedFileAttributes = ExtendedFileAttributes.ReadOnly |
                                                            ExtendedFileAttributes.Hidden |
                                                            ExtendedFileAttributes.System |
                                                            ExtendedFileAttributes.Archive |
                                                            ExtendedFileAttributes.Normal |
                                                            ExtendedFileAttributes.Temporary |
                                                            ExtendedFileAttributes.Offline |
                                                            ExtendedFileAttributes.Encrypted;
            return (extendedFileAttributes & (ExtendedFileAttributes)fileAttributes);
        }

        private static FileStatus ToFileStatus(CreateDisposition createDisposition)
        {
            switch (createDisposition)
            {
                case CreateDisposition.FILE_SUPERSEDE:
                    return FileStatus.FILE_SUPERSEDED;
                case CreateDisposition.FILE_OPEN:
                    return FileStatus.FILE_OPENED;
                case CreateDisposition.FILE_CREATE:
                    return FileStatus.FILE_CREATED;
                case CreateDisposition.FILE_OPEN_IF:
                    return FileStatus.FILE_OVERWRITTEN;
                case CreateDisposition.FILE_OVERWRITE:
                    return FileStatus.FILE_EXISTS;
                case CreateDisposition.FILE_OVERWRITE_IF:
                    return FileStatus.FILE_DOES_NOT_EXIST;
                default:
                    return FileStatus.FILE_OPENED;
            }
        }
    }
}