/// <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(); }