Microsoft.Protocols.TestTools.StackSdk.RemoteDesktop.Rdpbcgr.TS_FP_INPUT_PDU.EncodeFpHeaderData C# (CSharp) Method

        private byte[] EncodeFpHeaderData(int dataLength)
        {
            List<byte> fpHeaderData = new List<byte>();

            RdpbcgrEncoder.EncodeStructure(fpHeaderData, fpInputHeader);

            int totalLength = Marshal.SizeOf(fpInputHeader) + Marshal.SizeOf(length1) + dataLength;
            if (context.RdpEncryptionLevel == EncryptionLevel.ENCRYPTION_LEVEL_FIPS)
            {
                totalLength += Marshal.SizeOf(fipsInformation);
            }

            if (context.RdpEncryptionLevel != EncryptionLevel.ENCRYPTION_LEVEL_NONE)
            {
                totalLength += dataSignature.Length;
            }

            // if the most significant bit of the length1 field is set
            if (totalLength > 0x7F)
            {
                ++totalLength;

                // The overall PDU length is given by the low 7 bits of the length1 field
                // concatenated with the 8 bits of the length2 field, in big-endian order
                // (the length2 field contains the low-order bits).
                length1 = (byte)((totalLength >> 8) | 0x80);
                length2 = (byte)(totalLength & 0xFF);
                RdpbcgrEncoder.EncodeStructure(fpHeaderData, length1);
                RdpbcgrEncoder.EncodeStructure(fpHeaderData, length2);
            }
            else
            {
                // If the most significant bit of the length1 field is not set, then the size of the PDU is
                // in the range 1 to 127 bytes and the length1 field contains the overall PDU length
                // (the length2 field is not present in this case).
                length1 = (byte)(totalLength);
                length2 = 0;
                RdpbcgrEncoder.EncodeStructure(fpHeaderData, length1);
            }

            if (context.RdpEncryptionLevel == EncryptionLevel.ENCRYPTION_LEVEL_FIPS)
            {
                RdpbcgrEncoder.EncodeStructure(fpHeaderData, fipsInformation);
            }

            // encryptionFlags (2 bits): A higher 2-bit field containing the flags
            // that describe the cryptographic parameters of the PDU.
            if (((fpInputHeader.actionCode >> 6) & (int)encryptionFlags_Values.FASTPATH_INPUT_ENCRYPTED)
                == (int)encryptionFlags_Values.FASTPATH_INPUT_ENCRYPTED)
            {
                RdpbcgrEncoder.EncodeBytes(fpHeaderData, dataSignature);
            }

            if ((fpInputHeader.actionCode & (0x0F << 2)) == 0)
            {
                RdpbcgrEncoder.EncodeStructure(fpHeaderData, numberEvents);
            }
            return fpHeaderData.ToArray();
        }