dstIndex += 4;
        if (command == SMB_COM_NT_TRANSACT_SECONDARY) {
            writeInt4(parameterDisplacement, dst, dstIndex);
            dstIndex += 4;
        }
        writeInt4(dataCount, dst, dstIndex);
        dstIndex += 4;
        writeInt4(dataCount == 0 ? 0 : dataOffset, dst, dstIndex);
        dstIndex += 4;
        if (command == SMB_COM_NT_TRANSACT_SECONDARY) {
            writeInt4(dataDisplacement, dst, dstIndex);

    }

    @Override
    protected int writeParameterWordsWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;

        if (this.getCommand() != SMB_COM_NT_TRANSACT_SECONDARY) {
            dst[dstIndex++] = this.maxSetupCount;
        } else {
            dst[dstIndex++] = (byte) 0x00; // Reserved
        }
        dst[dstIndex] = (byte) 0x00; // Reserved
        dstIndex++;

                    ServerMessageBlock.SMB_COM_NT_CREATE_ANDX, ServerMessageBlock.SMB_COM_NT_TRANSACT,
                    ServerMessageBlock.SMB_COM_NT_TRANSACT_SECONDARY, ServerMessageBlock.SMB_COM_LOCKING_ANDX, (byte) 0xFF };

            String[] expectedStrings = { "SMB_COM_CREATE_DIRECTORY", "SMB_COM_DELETE_DIRECTORY", "SMB_COM_CLOSE", "SMB_COM_DELETE",

        // Second call should change to NT_TRANSACT_SECONDARY
        transaction.nextElement();
        assertEquals(ServerMessageBlock.SMB_COM_NT_TRANSACT_SECONDARY, transaction.command,
                "Command should change to SMB_COM_NT_TRANSACT_SECONDARY for NT transactions");
    }

    @Test
    @DisplayName("Test toString() method")
    void testToString() {

        case SMB_COM_WRITE_ANDX -> "SMB_COM_WRITE_ANDX";
        case SMB_COM_CREATE_DIRECTORY -> "SMB_COM_CREATE_DIRECTORY";
        case SMB_COM_NT_TRANSACT -> "SMB_COM_NT_TRANSACT";
        case SMB_COM_NT_TRANSACT_SECONDARY -> "SMB_COM_NT_TRANSACT_SECONDARY";
        default -> "UNKNOWN";
        };
        final String str = errorCode == 0 ? "0" : SmbException.getMessageByCode(errorCode);

        assertEquals((byte) 0xA0, SmbComTransaction.SMB_COM_NT_TRANSACT);
        assertEquals((byte) 0x26, SmbComTransaction.SMB_COM_TRANSACTION_SECONDARY);
        assertEquals((byte) 0xA1, SmbComTransaction.SMB_COM_NT_TRANSACT_SECONDARY);
    }

    @Test
    @DisplayName("Test sub-command constants")
    void testSubCommandConstants() {
        assertEquals((short) 0x0001, SmbComTransaction.TRANS2_FIND_FIRST2);

    void testWriteParameterWordsWireFormatSecondary() {
        byte[] dst = new byte[256];

        // Change command to secondary
        transaction.setCommand(ServerMessageBlock.SMB_COM_NT_TRANSACT_SECONDARY);

        // Set up transaction parameters
        transaction.setTotalParameterCount(100);
        transaction.setTotalDataCount(200);
        transaction.setParameterCount(30);

        } else {
            if (command != SMB_COM_NT_TRANSACT) {
                command = SMB_COM_TRANSACTION_SECONDARY;
            } else {
                command = SMB_COM_NT_TRANSACT_SECONDARY;
            }
            // totalParameterCount and totalDataCount are set ok from primary

            parameterOffset = SECONDARY_PARAMETER_OFFSET;

    @Test
    void testWriteParameterWordsWireFormat_SecondaryTransaction() {
        // Test the writeParameterWordsWireFormat for a secondary transaction.
        smbComNtTransaction.command = ServerMessageBlock.SMB_COM_NT_TRANSACT_SECONDARY;
        smbComNtTransaction.totalParameterCount = 10;
        smbComNtTransaction.totalDataCount = 20;
        smbComNtTransaction.parameterCount = 5;
        smbComNtTransaction.parameterOffset = 100;

        case SMB_COM_WRITE_ANDX -> "SMB_COM_WRITE_ANDX";
        case SMB_COM_CREATE_DIRECTORY -> "SMB_COM_CREATE_DIRECTORY";
        case SMB_COM_NT_TRANSACT -> "SMB_COM_NT_TRANSACT";
        case SMB_COM_NT_TRANSACT_SECONDARY -> "SMB_COM_NT_TRANSACT_SECONDARY";
        case SMB_COM_LOCKING_ANDX -> "SMB_COM_LOCKING_ANDX";
        default -> "UNKNOWN";
        };