/// <summary>
/// to decode the smb parameters: from the general SmbParameters to the concrete Smb Parameters.
/// </summary>
protected override void DecodeParameters()
{
if (this.smbParametersBlock.WordCount > 0)
{
this.smbParameters = TypeMarshal.ToStruct <SMB_COM_READ_ANDX_Response_SMB_Parameters>(
TypeMarshal.ToBytes(this.smbParametersBlock));
}
}
/// <summary>
/// Create SMB_COM_READ_ANDX packet
/// </summary>
/// <param name="connection">the connection identified the client</param>
/// <param name = "available">
/// This field is valid when reading from named pipes or I/O devices. This field indicates the number of bytes
/// remaining to be read after the requested read was completed. If the client reads from a disk file, this
/// field MUST be set to -1 (0xFFFF).
/// </param>
/// <param name = "data">The actual bytes read in response to the request </param>
/// <returns>SmbReadAndXResponsePacket </returns>
/// <exception cref="ArgumentNullException">connection must not be null</exception>
public virtual SmbReadAndxResponsePacket CreateSmbComReadResponse(
SmbServerConnection connection,
ushort available,
byte[] data)
{
if (connection == null)
{
throw new ArgumentNullException("connection");
}
if (data == null)
{
data = new byte[0];
}
SmbReadAndxResponsePacket packet = new SmbReadAndxResponsePacket();
// get the request packet
SmbPacket request = connection.GetRequestPacket(connection.MessageId);
// create smb packet header
packet.SmbHeader = CifsMessageUtils.CreateSmbHeader(
SmbCommand.SMB_COM_READ_ANDX,
connection.ProcessId, connection.MessageId, request.SmbHeader.Uid, request.SmbHeader.Tid,
(SmbFlags)connection.Capability.Flag, (SmbFlags2)connection.Capability.Flags2);
// update smb parameters
SMB_COM_READ_ANDX_Response_SMB_Parameters smbParameters = new SMB_COM_READ_ANDX_Response_SMB_Parameters();
smbParameters.AndXCommand = SmbCommand.SMB_COM_NO_ANDX_COMMAND;
smbParameters.Available = available;
smbParameters.DataLength = (ushort)data.Length;
smbParameters.DataLengthHigh =(ushort)(data.Length >> 16);
smbParameters.Reserved2 = new ushort[4];
smbParameters.WordCount = (byte)(CifsMessageUtils.GetSize<SMB_COM_READ_ANDX_Response_SMB_Parameters>(
smbParameters) / SmbCapability.NUM_BYTES_OF_WORD);
// update smb data
SMB_COM_READ_ANDX_Response_SMB_Data smbData = packet.SmbData;
smbData.Pad = new byte[1];
smbData.Data = data;
// update smbData.ByteCount
smbData.ByteCount = 0;
smbData.ByteCount += (ushort)smbData.Pad.Length;
smbData.ByteCount += (ushort)smbData.Data.Length;
smbParameters.DataOffset = (ushort)(
CifsMessageUtils.GetSize(packet.SmbHeader) +
CifsMessageUtils.GetSize(smbParameters) +
CifsMessageUtils.GetSize(smbData.ByteCount) + smbData.Pad.Length);
// store the parameters and data to packet.
packet.SmbParameters = smbParameters;
packet.SmbData = smbData;
return packet;
}
