dstIndex += 2;
        if (command == SMB_COM_TRANSACTION_SECONDARY) {
            writeInt2(parameterDisplacement, dst, dstIndex);
            dstIndex += 2;
        }
        writeInt2(dataCount, dst, dstIndex);
        dstIndex += 2;
        writeInt2(dataCount == 0 ? 0 : dataOffset, dst, dstIndex);
        dstIndex += 2;
        if (command == SMB_COM_TRANSACTION_SECONDARY) {

                    ServerMessageBlock.SMB_COM_TRANSACTION, ServerMessageBlock.SMB_COM_TRANSACTION2,
                    ServerMessageBlock.SMB_COM_TRANSACTION_SECONDARY, ServerMessageBlock.SMB_COM_FIND_CLOSE2,
                    ServerMessageBlock.SMB_COM_TREE_DISCONNECT, ServerMessageBlock.SMB_COM_SESSION_SETUP_ANDX,

        // Second call - secondary
        transaction.nextElement();

        // Verify command changed to secondary
        assertEquals(ServerMessageBlock.SMB_COM_TRANSACTION_SECONDARY, transaction.command,
                "Command should change to SMB_COM_TRANSACTION_SECONDARY");
    }

    @Test
    @DisplayName("Test NT transaction command handling")
    void testNtTransactionCommand() {

            this.dataCount = Math.min(this.totalDataCount, available);
        } else {
            if (this.getCommand() != SMB_COM_NT_TRANSACT) {
                this.setCommand(SMB_COM_TRANSACTION_SECONDARY);
            } else {
                this.setCommand(SMB_COM_NT_TRANSACT_SECONDARY);
            }
            // totalParameterCount and totalDataCount are set ok from primary

        case SMB_COM_CHECK_DIRECTORY -> "SMB_COM_CHECK_DIRECTORY";
        case SMB_COM_TRANSACTION -> "SMB_COM_TRANSACTION";
        case SMB_COM_TRANSACTION2 -> "SMB_COM_TRANSACTION2";
        case SMB_COM_TRANSACTION_SECONDARY -> "SMB_COM_TRANSACTION_SECONDARY";
        case SMB_COM_FIND_CLOSE2 -> "SMB_COM_FIND_CLOSE2";
        case SMB_COM_TREE_DISCONNECT -> "SMB_COM_TREE_DISCONNECT";
        case SMB_COM_LOGOFF_ANDX -> "SMB_COM_LOGOFF_ANDX";

        assertEquals((byte) 0x25, SmbComTransaction.SMB_COM_TRANSACTION);
        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() {

        case SMB_COM_CHECK_DIRECTORY -> "SMB_COM_CHECK_DIRECTORY";
        case SMB_COM_TRANSACTION -> "SMB_COM_TRANSACTION";
        case SMB_COM_TRANSACTION2 -> "SMB_COM_TRANSACTION2";
        case SMB_COM_TRANSACTION_SECONDARY -> "SMB_COM_TRANSACTION_SECONDARY";
        case SMB_COM_FIND_CLOSE2 -> "SMB_COM_FIND_CLOSE2";
        case SMB_COM_TREE_DISCONNECT -> "SMB_COM_TREE_DISCONNECT";
        case SMB_COM_LOGOFF_ANDX -> "SMB_COM_LOGOFF_ANDX";