コード例 #1
0
        private SMB2Command ProcessSMB2Command(SMB2Command command, SMB2ConnectionState state)
        {
            if (command is SessionSetupRequest)
            {
                return(SessionSetupHelper.GetSessionSetupResponse((SessionSetupRequest)command, m_securityProvider, state));
            }
            else if (command is EchoRequest)
            {
                return(new EchoResponse());
            }
            else
            {
                SMB2Session session = state.GetSession(command.Header.SessionID);
                if (session == null)
                {
                    return(new ErrorResponse(command.CommandName, NTStatus.STATUS_USER_SESSION_DELETED));
                }

                if (command is TreeConnectRequest)
                {
                    return(TreeConnectHelper.GetTreeConnectResponse((TreeConnectRequest)command, state, m_services, m_shares));
                }
                else if (command is LogoffRequest)
                {
                    state.LogToServer(Severity.Information, "Logoff: User '{0}' logged off. (SessionID: {1})", session.UserName, command.Header.SessionID);
                    m_securityProvider.DeleteSecurityContext(ref session.SecurityContext.AuthenticationContext);
                    state.RemoveSession(command.Header.SessionID);
                    return(new LogoffResponse());
                }
                else if (command.Header.IsAsync)
                {
                    // TreeID will not be present in an ASYNC header
                    if (command is CancelRequest)
                    {
                        return(CancelHelper.GetCancelResponse((CancelRequest)command, state));
                    }
                }
                else
                {
                    ISMBShare share = session.GetConnectedTree(command.Header.TreeID);
                    if (share == null)
                    {
                        state.LogToServer(Severity.Verbose, "{0} failed. Invalid TreeID (SessionID: {1}, TreeID: {2}).", command.CommandName, command.Header.SessionID, command.Header.TreeID);
                        return(new ErrorResponse(command.CommandName, NTStatus.STATUS_NETWORK_NAME_DELETED));
                    }

                    if (command is TreeDisconnectRequest)
                    {
                        return(TreeConnectHelper.GetTreeDisconnectResponse((TreeDisconnectRequest)command, share, state));
                    }
                    else if (command is CreateRequest)
                    {
                        return(CreateHelper.GetCreateResponse((CreateRequest)command, share, state));
                    }
                    else if (command is QueryInfoRequest)
                    {
                        return(QueryInfoHelper.GetQueryInfoResponse((QueryInfoRequest)command, share, state));
                    }
                    else if (command is SetInfoRequest)
                    {
                        return(SetInfoHelper.GetSetInfoResponse((SetInfoRequest)command, share, state));
                    }
                    else if (command is QueryDirectoryRequest)
                    {
                        return(QueryDirectoryHelper.GetQueryDirectoryResponse((QueryDirectoryRequest)command, share, state));
                    }
                    else if (command is ReadRequest)
                    {
                        return(ReadWriteResponseHelper.GetReadResponse((ReadRequest)command, share, state));
                    }
                    else if (command is WriteRequest)
                    {
                        return(ReadWriteResponseHelper.GetWriteResponse((WriteRequest)command, share, state));
                    }
                    else if (command is LockRequest)
                    {
                        return(LockHelper.GetLockResponse((LockRequest)command, share, state));
                    }
                    else if (command is FlushRequest)
                    {
                        return(ReadWriteResponseHelper.GetFlushResponse((FlushRequest)command, share, state));
                    }
                    else if (command is CloseRequest)
                    {
                        return(CloseHelper.GetCloseResponse((CloseRequest)command, share, state));
                    }
                    else if (command is IOCtlRequest)
                    {
                        return(IOCtlHelper.GetIOCtlResponse((IOCtlRequest)command, share, state));
                    }
                    else if (command is CancelRequest)
                    {
                        return(CancelHelper.GetCancelResponse((CancelRequest)command, state));
                    }
                    else if (command is ChangeNotifyRequest)
                    {
                        return(ChangeNotifyHelper.GetChangeNotifyInterimResponse((ChangeNotifyRequest)command, share, state));
                    }
                }
            }

            return(new ErrorResponse(command.CommandName, NTStatus.STATUS_NOT_SUPPORTED));
        }
コード例 #2
0
        private SMB2Command ProcessSMB2Command(SMB2Command command, SMB2ConnectionState state)
        {
            if (command is SessionSetupRequest)
            {
                return(SessionSetupHelper.GetSessionSetupResponse((SessionSetupRequest)command, m_securityProvider, state));
            }
            else if (command is EchoRequest)
            {
                return(new EchoResponse());
            }
            else
            {
                SMB2Session session = state.GetSession(command.Header.SessionID);
                if (session == null)
                {
                    return(new ErrorResponse(command.CommandName, NTStatus.STATUS_USER_SESSION_DELETED));
                }

                if (command is TreeConnectRequest)
                {
                    return(TreeConnectHelper.GetTreeConnectResponse((TreeConnectRequest)command, state, m_services, m_shares));
                }
                else if (command is LogoffRequest)
                {
                    state.LogToServer(Severity.Information, "Logoff: User '{0}' logged off.", session.UserName);
                    m_securityProvider.DeleteSecurityContext(ref session.SecurityContext.AuthenticationContext);
                    state.RemoveSession(command.Header.SessionID);
                    return(new LogoffResponse());
                }
                else
                {
                    // Cancel requests can have an ASYNC header (TreeID will not be present)
                    if (command is CancelRequest)
                    {
                        if (command.Header.IsAsync && command.Header.AsyncID == 0)
                        {
                            ErrorResponse response = new ErrorResponse(command.CommandName, NTStatus.STATUS_CANCELLED);
                            response.Header.IsAsync = true;
                            return(response);
                        }

                        // [MS-SMB2] If a request is not found, the server MUST stop processing for this cancel request. No response is sent.
                        return(null);
                    }

                    ISMBShare share = session.GetConnectedTree(command.Header.TreeID);
                    if (share == null)
                    {
                        return(new ErrorResponse(command.CommandName, NTStatus.STATUS_NETWORK_NAME_DELETED));
                    }

                    if (command is TreeDisconnectRequest)
                    {
                        return(TreeConnectHelper.GetTreeDisconnectResponse((TreeDisconnectRequest)command, share, state));
                    }
                    else if (command is CreateRequest)
                    {
                        return(CreateHelper.GetCreateResponse((CreateRequest)command, share, state));
                    }
                    else if (command is QueryInfoRequest)
                    {
                        return(QueryInfoHelper.GetQueryInfoResponse((QueryInfoRequest)command, share, state));
                    }
                    else if (command is SetInfoRequest)
                    {
                        return(SetInfoHelper.GetSetInfoResponse((SetInfoRequest)command, share, state));
                    }
                    else if (command is QueryDirectoryRequest)
                    {
                        return(QueryDirectoryHelper.GetQueryDirectoryResponse((QueryDirectoryRequest)command, share, state));
                    }
                    else if (command is ReadRequest)
                    {
                        return(ReadWriteResponseHelper.GetReadResponse((ReadRequest)command, share, state));
                    }
                    else if (command is WriteRequest)
                    {
                        return(ReadWriteResponseHelper.GetWriteResponse((WriteRequest)command, share, state));
                    }
                    else if (command is FlushRequest)
                    {
                        FlushRequest   request  = (FlushRequest)command;
                        OpenFileObject openFile = session.GetOpenFileObject(request.FileId);
                        if (openFile == null)
                        {
                            return(new ErrorResponse(request.CommandName, NTStatus.STATUS_FILE_CLOSED));
                        }
                        NTStatus status = share.FileStore.FlushFileBuffers(openFile.Handle);
                        if (status != NTStatus.STATUS_SUCCESS)
                        {
                            return(new ErrorResponse(request.CommandName, status));
                        }
                        return(new FlushResponse());
                    }
                    else if (command is CloseRequest)
                    {
                        return(CloseHelper.GetCloseResponse((CloseRequest)command, share, state));
                    }
                    else if (command is IOCtlRequest)
                    {
                        return(IOCtlHelper.GetIOCtlResponse((IOCtlRequest)command, share, state));
                    }
                    else if (command is ChangeNotifyRequest)
                    {
                        // [MS-SMB2] If the underlying object store does not support change notifications, the server MUST fail this request with STATUS_NOT_SUPPORTED
                        ErrorResponse response = new ErrorResponse(command.CommandName, NTStatus.STATUS_NOT_SUPPORTED);
                        // Windows 7 / 8 / 10 will infinitely retry sending ChangeNotify requests if the response does not have SMB2_FLAGS_ASYNC_COMMAND set.
                        // Note: NoRemoteChangeNotify can be set in the registry to prevent the client from sending ChangeNotify requests altogether.
                        response.Header.IsAsync = true;
                        return(response);
                    }
                }
            }

            return(new ErrorResponse(command.CommandName, NTStatus.STATUS_NOT_SUPPORTED));
        }
コード例 #3
0
        private List <SMB1Command> ProcessSMB1Command(SMB1Header header, SMB1Command command, SMB1ConnectionState state)
        {
            if (command is SessionSetupAndXRequest)
            {
                SessionSetupAndXRequest request = (SessionSetupAndXRequest)command;
                state.MaxBufferSize = request.MaxBufferSize;
                return(SessionSetupHelper.GetSessionSetupResponse(header, request, m_securityProvider, state));
            }
            else if (command is SessionSetupAndXRequestExtended)
            {
                SessionSetupAndXRequestExtended request = (SessionSetupAndXRequestExtended)command;
                state.MaxBufferSize = request.MaxBufferSize;
                return(SessionSetupHelper.GetSessionSetupResponseExtended(header, request, m_securityProvider, state));
            }
            else if (command is EchoRequest)
            {
                return(ServerResponseHelper.GetEchoResponse((EchoRequest)command));
            }
            else
            {
                SMB1Session session = state.GetSession(header.UID);
                if (session == null)
                {
                    header.Status = NTStatus.STATUS_USER_SESSION_DELETED;
                    return(new ErrorResponse(command.CommandName));
                }

                if (command is TreeConnectAndXRequest)
                {
                    TreeConnectAndXRequest request = (TreeConnectAndXRequest)command;
                    return(TreeConnectHelper.GetTreeConnectResponse(header, request, state, m_services, m_shares));
                }
                else if (command is LogoffAndXRequest)
                {
                    state.LogToServer(Severity.Information, "Logoff: User '{0}' logged off.", session.UserName);
                    m_securityProvider.DeleteSecurityContext(ref session.SecurityContext.AuthenticationContext);
                    state.RemoveSession(header.UID);
                    return(new LogoffAndXResponse());
                }
                else
                {
                    ISMBShare share = session.GetConnectedTree(header.TID);
                    if (share == null)
                    {
                        header.Status = NTStatus.STATUS_SMB_BAD_TID;
                        return(new ErrorResponse(command.CommandName));
                    }

                    if (command is CreateDirectoryRequest)
                    {
                        CreateDirectoryRequest request = (CreateDirectoryRequest)command;
                        return(FileStoreResponseHelper.GetCreateDirectoryResponse(header, request, share, state));
                    }
                    else if (command is DeleteDirectoryRequest)
                    {
                        DeleteDirectoryRequest request = (DeleteDirectoryRequest)command;
                        return(FileStoreResponseHelper.GetDeleteDirectoryResponse(header, request, share, state));
                    }
                    else if (command is CloseRequest)
                    {
                        CloseRequest request = (CloseRequest)command;
                        return(ServerResponseHelper.GetCloseResponse(header, request, share, state));
                    }
                    else if (command is FlushRequest)
                    {
                        return(new FlushResponse());
                    }
                    else if (command is DeleteRequest)
                    {
                        DeleteRequest request = (DeleteRequest)command;
                        return(FileStoreResponseHelper.GetDeleteResponse(header, request, share, state));
                    }
                    else if (command is RenameRequest)
                    {
                        RenameRequest request = (RenameRequest)command;
                        return(FileStoreResponseHelper.GetRenameResponse(header, request, share, state));
                    }
                    else if (command is QueryInformationRequest)
                    {
                        QueryInformationRequest request = (QueryInformationRequest)command;
                        return(FileStoreResponseHelper.GetQueryInformationResponse(header, request, share, state));
                    }
                    else if (command is SetInformationRequest)
                    {
                        SetInformationRequest request = (SetInformationRequest)command;
                        return(FileStoreResponseHelper.GetSetInformationResponse(header, request, share, state));
                    }
                    else if (command is ReadRequest)
                    {
                        ReadRequest request = (ReadRequest)command;
                        return(ReadWriteResponseHelper.GetReadResponse(header, request, share, state));
                    }
                    else if (command is WriteRequest)
                    {
                        WriteRequest request = (WriteRequest)command;
                        return(ReadWriteResponseHelper.GetWriteResponse(header, request, share, state));
                    }
                    else if (command is CheckDirectoryRequest)
                    {
                        CheckDirectoryRequest request = (CheckDirectoryRequest)command;
                        return(FileStoreResponseHelper.GetCheckDirectoryResponse(header, request, share, state));
                    }
                    else if (command is WriteRawRequest)
                    {
                        // [MS-CIFS] 3.3.5.26 - Receiving an SMB_COM_WRITE_RAW Request:
                        // the server MUST verify that the Server.Capabilities include CAP_RAW_MODE,
                        // If an error is detected [..] the Write Raw operation MUST fail and
                        // the server MUST return a Final Server Response [..] with the Count field set to zero.
                        return(new WriteRawFinalResponse());
                    }
                    else if (command is SetInformation2Request)
                    {
                        SetInformation2Request request = (SetInformation2Request)command;
                        return(FileStoreResponseHelper.GetSetInformation2Response(header, request, share, state));
                    }
                    else if (command is LockingAndXRequest)
                    {
                        header.Status = NTStatus.STATUS_ACCESS_DENIED;
                        return(new ErrorResponse(command.CommandName));
                    }
                    else if (command is OpenAndXRequest)
                    {
                        OpenAndXRequest request = (OpenAndXRequest)command;
                        return(OpenAndXHelper.GetOpenAndXResponse(header, request, share, state));
                    }
                    else if (command is ReadAndXRequest)
                    {
                        ReadAndXRequest request = (ReadAndXRequest)command;
                        return(ReadWriteResponseHelper.GetReadResponse(header, request, share, state));
                    }
                    else if (command is WriteAndXRequest)
                    {
                        WriteAndXRequest request = (WriteAndXRequest)command;
                        return(ReadWriteResponseHelper.GetWriteResponse(header, request, share, state));
                    }
                    else if (command is FindClose2Request)
                    {
                        return(ServerResponseHelper.GetFindClose2Request(header, (FindClose2Request)command, state));
                    }
                    else if (command is TreeDisconnectRequest)
                    {
                        TreeDisconnectRequest request = (TreeDisconnectRequest)command;
                        return(TreeConnectHelper.GetTreeDisconnectResponse(header, request, share, state));
                    }
                    else if (command is TransactionRequest) // Both TransactionRequest and Transaction2Request
                    {
                        TransactionRequest request = (TransactionRequest)command;
                        return(TransactionHelper.GetTransactionResponse(header, request, share, state));
                    }
                    else if (command is TransactionSecondaryRequest) // Both TransactionSecondaryRequest and Transaction2SecondaryRequest
                    {
                        TransactionSecondaryRequest request = (TransactionSecondaryRequest)command;
                        return(TransactionHelper.GetTransactionResponse(header, request, share, state));
                    }
                    else if (command is NTTransactRequest)
                    {
                        NTTransactRequest request = (NTTransactRequest)command;
                        return(NTTransactHelper.GetNTTransactResponse(header, request, share, state));
                    }
                    else if (command is NTTransactSecondaryRequest)
                    {
                        NTTransactSecondaryRequest request = (NTTransactSecondaryRequest)command;
                        return(NTTransactHelper.GetNTTransactResponse(header, request, share, state));
                    }
                    else if (command is NTCreateAndXRequest)
                    {
                        NTCreateAndXRequest request = (NTCreateAndXRequest)command;
                        return(NTCreateHelper.GetNTCreateResponse(header, request, share, state));
                    }
                }
            }

            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
            return(new ErrorResponse(command.CommandName));
        }
コード例 #4
0
        /// <summary>
        /// May return null
        /// </summary>
        public SMBCommand ProcessCommand(SMBHeader header, SMBCommand command, StateObject state, List <SMBCommand> sendQueue)
        {
            if (command is NegotiateRequest)
            {
                NegotiateRequest request = (NegotiateRequest)command;
                if (request.Dialects.Contains(SMBServer.NTLanManagerDialect))
                {
                    if (EnableExtendedSecurity && header.ExtendedSecurityFlag)
                    {
                        return(NegotiateHelper.GetNegotiateResponseExtended(request, m_serverGuid));
                    }
                    else
                    {
                        return(new NegotiateResponseNotSupported());
                    }
                }
                else
                {
                    return(new NegotiateResponseNotSupported());
                }
            }
            else if (command is SessionSetupAndXRequest)
            {
                SessionSetupAndXRequest request = (SessionSetupAndXRequest)command;
                state.MaxBufferSize = request.MaxBufferSize;
                //this probably won't work
                return(NegotiateHelper.GetSessionSetupResponse(header, request, state));
            }
            else if (command is SessionSetupAndXRequestExtended)
            {
                SessionSetupAndXRequestExtended request = (SessionSetupAndXRequestExtended)command;
                state.MaxBufferSize = request.MaxBufferSize;
                return(NegotiateHelper.GetSessionSetupResponseExtended(header, request, state));
            }
            else if (command is EchoRequest)
            {
                return(ServerResponseHelper.GetEchoResponse((EchoRequest)command, sendQueue));
            }
            else if (state.IsAuthenticated(header.UID))
            {
                if (command is TreeConnectAndXRequest)
                {
                    TreeConnectAndXRequest request = (TreeConnectAndXRequest)command;
                    return(TreeConnectHelper.GetTreeConnectResponse(header, request, state, m_shares));
                }
                else if (command is LogoffAndXRequest)
                {
                    return(new LogoffAndXResponse());
                }
                else if (state.IsTreeConnected(header.TID))
                {
                    string rootPath = state.GetConnectedTreePath(header.TID);
                    object share;
                    if (state.IsIPC(header.TID))
                    {
                        share = m_services;
                    }
                    else
                    {
                        share = m_shares.GetShareFromRelativePath(rootPath);
                    }

                    if (command is CreateDirectoryRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        CreateDirectoryRequest request = (CreateDirectoryRequest)command;
                        return(FileSystemResponseHelper.GetCreateDirectoryResponse(header, request, (FileSystemShare)share, state));
                    }
                    else if (command is DeleteDirectoryRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        DeleteDirectoryRequest request = (DeleteDirectoryRequest)command;
                        return(FileSystemResponseHelper.GetDeleteDirectoryResponse(header, request, (FileSystemShare)share, state));
                    }
                    else if (command is CloseRequest)
                    {
                        CloseRequest request = (CloseRequest)command;
                        return(ServerResponseHelper.GetCloseResponse(header, request, state));
                    }
                    else if (command is FlushRequest)
                    {
                        return(new FlushResponse());
                    }
                    else if (command is DeleteRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        DeleteRequest request = (DeleteRequest)command;
                        return(FileSystemResponseHelper.GetDeleteResponse(header, request, (FileSystemShare)share, state));
                    }
                    else if (command is RenameRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        RenameRequest request = (RenameRequest)command;
                        return(FileSystemResponseHelper.GetRenameResponse(header, request, (FileSystemShare)share, state));
                    }
                    else if (command is QueryInformationRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        QueryInformationRequest request = (QueryInformationRequest)command;
                        return(FileSystemResponseHelper.GetQueryInformationResponse(header, request, (FileSystemShare)share));
                    }
                    else if (command is SetInformationRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        SetInformationRequest request = (SetInformationRequest)command;
                        return(FileSystemResponseHelper.GetSetInformationResponse(header, request, (FileSystemShare)share, state));
                    }
                    else if (command is ReadRequest)
                    {
                        ReadRequest request = (ReadRequest)command;
                        return(ReadWriteResponseHelper.GetReadResponse(header, request, share, state));
                    }
                    else if (command is WriteRequest)
                    {
                        string userName = state.GetConnectedUserName(header.UID);
                        if (share is FileSystemShare && !((FileSystemShare)share).HasWriteAccess(userName))
                        {
                            header.Status = NTStatus.STATUS_ACCESS_DENIED;
                            return(new ErrorResponse(command.CommandName));
                        }
                        WriteRequest request = (WriteRequest)command;
                        return(ReadWriteResponseHelper.GetWriteResponse(header, request, share, state));
                    }
                    else if (command is CheckDirectoryRequest)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        CheckDirectoryRequest request = (CheckDirectoryRequest)command;
                        return(FileSystemResponseHelper.GetCheckDirectoryResponse(header, request, (FileSystemShare)share));
                    }
                    else if (command is WriteRawRequest)
                    {
                        // [MS-CIFS] 3.3.5.26 - Receiving an SMB_COM_WRITE_RAW Request:
                        // the server MUST verify that the Server.Capabilities include CAP_RAW_MODE,
                        // If an error is detected [..] the Write Raw operation MUST fail and
                        // the server MUST return a Final Server Response [..] with the Count field set to zero.
                        return(new WriteRawFinalResponse());
                    }
                    else if (command is SetInformation2Request)
                    {
                        if (!(share is FileSystemShare))
                        {
                            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
                            return(new ErrorResponse(command.CommandName));
                        }
                        SetInformation2Request request = (SetInformation2Request)command;
                        return(FileSystemResponseHelper.GetSetInformation2Response(header, request, (FileSystemShare)share, state));
                    }
                    else if (command is LockingAndXRequest)
                    {
                        header.Status = NTStatus.STATUS_ACCESS_DENIED;
                        return(new ErrorResponse(CommandName.SMB_COM_LOCKING_ANDX));
                    }
                    else if (command is OpenAndXRequest)
                    {
                        OpenAndXRequest request = (OpenAndXRequest)command;
                        return(OpenAndXHelper.GetOpenAndXResponse(header, request, share, state));
                    }
                    else if (command is ReadAndXRequest)
                    {
                        ReadAndXRequest request = (ReadAndXRequest)command;
                        return(ReadWriteResponseHelper.GetReadResponse(header, request, share, state));
                    }
                    else if (command is WriteAndXRequest)
                    {
                        string userName = state.GetConnectedUserName(header.UID);
                        if (share is FileSystemShare && !((FileSystemShare)share).HasWriteAccess(userName))
                        {
                            header.Status = NTStatus.STATUS_ACCESS_DENIED;
                            return(new ErrorResponse(command.CommandName));
                        }
                        WriteAndXRequest request = (WriteAndXRequest)command;
                        return(ReadWriteResponseHelper.GetWriteResponse(header, request, share, state));
                    }
                    else if (command is FindClose2Request)
                    {
                        return(ServerResponseHelper.GetFindClose2Request(header, (FindClose2Request)command, state));
                    }
                    else if (command is TreeDisconnectRequest)
                    {
                        TreeDisconnectRequest request = (TreeDisconnectRequest)command;
                        return(TreeConnectHelper.GetTreeDisconnectResponse(header, request, state));
                    }
                    else if (command is TransactionRequest) // Both TransactionRequest and Transaction2Request
                    {
                        TransactionRequest request = (TransactionRequest)command;
                        try
                        {
                            return(TransactionHelper.GetTransactionResponse(header, request, share, state, sendQueue));
                        }
                        catch (UnsupportedInformationLevelException)
                        {
                            header.Status = NTStatus.STATUS_INVALID_PARAMETER;
                            return(new ErrorResponse(command.CommandName));
                        }
                    }
                    else if (command is TransactionSecondaryRequest) // Both TransactionSecondaryRequest and Transaction2SecondaryRequest
                    {
                        TransactionSecondaryRequest request = (TransactionSecondaryRequest)command;
                        try
                        {
                            return(TransactionHelper.GetTransactionResponse(header, request, share, state, sendQueue));
                        }
                        catch (UnsupportedInformationLevelException)
                        {
                            header.Status = NTStatus.STATUS_INVALID_PARAMETER;
                            return(new ErrorResponse(command.CommandName));
                        }
                    }
                    else if (command is NTTransactRequest)
                    {
                        NTTransactRequest request = (NTTransactRequest)command;
                        return(NTTransactHelper.GetNTTransactResponse(header, request, share, state, sendQueue));
                    }
                    else if (command is NTTransactSecondaryRequest)
                    {
                        NTTransactSecondaryRequest request = (NTTransactSecondaryRequest)command;
                        return(NTTransactHelper.GetNTTransactResponse(header, request, share, state, sendQueue));
                    }
                    else if (command is NTCreateAndXRequest)
                    {
                        NTCreateAndXRequest request = (NTCreateAndXRequest)command;
                        return(NTCreateHelper.GetNTCreateResponse(header, request, share, state));
                    }
                }
                else
                {
                    header.Status = NTStatus.STATUS_SMB_BAD_TID;
                    return(new ErrorResponse(command.CommandName));
                }
            }

            header.Status = NTStatus.STATUS_SMB_BAD_COMMAND;
            return(new ErrorResponse(command.CommandName));
        }