/// <summary>
/// to decode the smb parameters: from the general SmbParameters to the concrete Smb Parameters.
/// </summary>
protected override void DecodeParameters()
{
this.smbParameters = TypeMarshal.ToStruct<SMB_COM_NT_TRANSACT_SECONDARY_Request_SMB_Parameters>(
TypeMarshal.ToBytes(this.smbParametersBlock));
}
/// <summary>
/// to split a nttrans request to a nttrans request with nttrans secondary requests.
/// </summary>
/// <param name="ntTransRequest">the nttrans request packet to be split.</param>
/// <param name="parameterCount">the parameter count with which to split the request packet.</param>
/// <param name="dataCount">the data count with which to split the request packet.</param>
/// <returns>a requests array of the split nttrans request with nttrans secondary requests.</returns>
public SmbPacket[] CreateNtTransWith2ndRequests(
SmbNtTransactRequestPacket ntTransRequest,
int parameterCount,
int dataCount)
{
ntTransRequest.ToBytes();
ntTransRequest.isDivided = true;
int paramLength = 0;
if (ntTransRequest.SmbData.NT_Trans_Parameters != null)
{
paramLength = ntTransRequest.SmbData.NT_Trans_Parameters.Length;
}
double paramNumber = Math.Ceiling((double)paramLength / parameterCount);
int dataLength = 0;
if (ntTransRequest.SmbData.NT_Trans_Data != null)
{
dataLength = ntTransRequest.SmbData.NT_Trans_Data.Length;
}
int dataNumber = (int)Math.Ceiling((double)dataLength / dataCount);
double packetCount = paramNumber > dataNumber ? paramNumber : dataNumber;
List<SmbPacket> packetList = new List<SmbPacket>();
if (packetCount > 1)
{
byte[] ntTransParameters = ntTransRequest.SmbData.NT_Trans_Parameters;
byte[] ntTransData = ntTransRequest.SmbData.NT_Trans_Data;
SMB_COM_NT_TRANSACT_Request_SMB_Data ntTransSmbData = ntTransRequest.SmbData;
if (paramLength > parameterCount)
{
ntTransSmbData.NT_Trans_Parameters = new byte[parameterCount];
Array.Copy(ntTransParameters, ntTransSmbData.NT_Trans_Parameters, parameterCount);
}
if (dataLength > dataCount)
{
ntTransSmbData.NT_Trans_Data = new byte[dataCount];
Array.Copy(ntTransData, ntTransSmbData.NT_Trans_Data, dataCount);
}
ntTransRequest.SmbData = ntTransSmbData;
ntTransRequest.UpdateCountAndOffset();
packetList.Add(ntTransRequest);
int currentIndex = 1;
long remainedParamCount = ntTransRequest.SmbParameters.TotalParameterCount - parameterCount;
long remainedDataCount = ntTransRequest.SmbParameters.TotalDataCount - dataCount;
while (currentIndex < packetCount)
{
SmbNtTransactSecondaryRequestPacket packet = new SmbNtTransactSecondaryRequestPacket();
SmbHeader header = ntTransRequest.SmbHeader;
header.Command = SmbCommand.SMB_COM_NT_TRANSACT_SECONDARY;
packet.SmbHeader = header;
// Set Smb_Parameters
SMB_COM_NT_TRANSACT_SECONDARY_Request_SMB_Parameters smbParameters =
new SMB_COM_NT_TRANSACT_SECONDARY_Request_SMB_Parameters();
smbParameters.Reserved1 = new byte[3];
smbParameters.TotalParameterCount = ntTransRequest.SmbParameters.TotalParameterCount;
smbParameters.TotalDataCount = ntTransRequest.SmbParameters.TotalDataCount;
smbParameters.WordCount = (byte)(CifsMessageUtils.GetSize<
SMB_COM_NT_TRANSACT_SECONDARY_Request_SMB_Parameters>(smbParameters) / NumBytesOfWord);
// Set Smb_Data
SMB_COM_NT_TRANSACT_SECONDARY_Request_SMB_Data smbData = new SMB_COM_NT_TRANSACT_SECONDARY_Request_SMB_Data();
if (remainedParamCount > parameterCount)
{
smbData.NT_Trans_Parameters = new byte[parameterCount];
Array.Copy(ntTransParameters, parameterCount * currentIndex, smbData.NT_Trans_Parameters, 0, parameterCount);
smbParameters.ParameterDisplacement = (ushort)(parameterCount * currentIndex);
remainedParamCount -= parameterCount;
}
else if (remainedParamCount > 0)
{
smbData.NT_Trans_Parameters = new byte[remainedParamCount];
Array.Copy(ntTransParameters, parameterCount * currentIndex, smbData.NT_Trans_Parameters, 0, remainedParamCount);
smbParameters.ParameterDisplacement = (ushort)(parameterCount * currentIndex);
remainedParamCount -= parameterCount;
}
else
{
smbData.NT_Trans_Parameters = new byte[0];
}
if (remainedDataCount > dataCount)
{
smbData.NT_Trans_Data = new byte[dataCount];
Array.Copy(ntTransData, dataCount * currentIndex, smbData.NT_Trans_Data, 0, dataCount);
smbParameters.DataDisplacement = (ushort)(dataCount * currentIndex);
remainedDataCount -= dataCount;
}
else if (remainedDataCount > 0)
{
smbData.NT_Trans_Data = new byte[remainedDataCount];
Array.Copy(ntTransData, dataCount * currentIndex, smbData.NT_Trans_Data, 0, remainedDataCount);
smbParameters.DataDisplacement = (ushort)(dataCount * currentIndex);
remainedDataCount -= dataCount;
}
else
{
smbData.NT_Trans_Data = new byte[0];
}
packet.SmbParameters = smbParameters;
packet.SmbData = smbData;
currentIndex++;
packet.UpdateCountAndOffset();
packetList.Add(packet);
}
}
else
{
packetList.Add(ntTransRequest);
}
return packetList.ToArray();
}
