/// <summary>
 /// to decode the smb data: from the general SmbDada to the concrete Smb Data.
 /// </summary>
 protected override void DecodeData()
 {
     this.smbData = TypeMarshal.ToStruct<SMB_COM_QUERY_INFORMATION_Request_SMB_Data>(
         TypeMarshal.ToBytes(this.smbDataBlock));
 }
        /// <summary>
        /// to create a QueryInformation request packet.
        /// </summary>
        /// <param name="messageId">This field SHOULD be the multiplex ID that is used to associate a response with
        /// a request.</param>
        /// <param name="uid">This field SHOULD identify the authenticated instance of the user.</param>
        /// <param name="treeId">This field identifies the subdirectory (or tree) on the server that the client is
        /// accessing.</param>
        /// <param name="flags">An 8-bit field of 1-bit flags describing various features in effect for the 
        /// message</param>
        /// <param name="flags2">A 16-bit field of 1-bit flags that represent various features in effect for the 
        /// message. Unspecified bits are reserved and MUST be zero.</param>
        /// <param name="fileName">A null-terminated string that represents the fully qualified name of the file 
        /// relative to the supplied TID. This is the file for which attributes are queried and returned.</param>
        /// <returns>a QueryInformation request packet</returns>
        public SmbQueryInformationRequestPacket CreateQueryInformationRequest(
            ushort messageId,
            ushort uid,
            ushort treeId,
            SmbFlags flags,
            SmbFlags2 flags2,
            string fileName)
        {
            if (fileName == null)
            {
                fileName = string.Empty;
            }

            SmbQueryInformationRequestPacket packet = new SmbQueryInformationRequestPacket();

            packet.SmbHeader = CifsMessageUtils.CreateSmbHeader(SmbCommand.SMB_COM_QUERY_INFORMATION,
                messageId, uid, treeId, flags, flags2);

            SMB_COM_QUERY_INFORMATION_Request_SMB_Parameters smbParameters;
            smbParameters = new SMB_COM_QUERY_INFORMATION_Request_SMB_Parameters();
            smbParameters.WordCount = 0;

            SMB_COM_QUERY_INFORMATION_Request_SMB_Data smbData = new SMB_COM_QUERY_INFORMATION_Request_SMB_Data();
            smbData.BufferFormat = (byte)DataBufferFormat.SmbString;
            smbData.FileName = CifsMessageUtils.ToSmbStringBytes(fileName,
                (flags2 & SmbFlags2.SMB_FLAGS2_UNICODE) == SmbFlags2.SMB_FLAGS2_UNICODE);
            smbData.ByteCount = (ushort)(Marshal.SizeOf(smbData.BufferFormat) + smbData.FileName.Length);

            packet.SmbParameters = smbParameters;
            packet.SmbData = smbData;

            return packet;
        }