public void setBuffer(final byte[] buffer) {
        this.txn_buf = buffer;
    }

    /**
     * Releases and returns the transaction buffer
     * @return the txn_buf
     */
    public byte[] releaseBuffer() {
        final byte[] buf = this.txn_buf;
        this.txn_buf = null;
        return buf;
    }

    /**
     * Gets the transaction subcommand
     * @return the subCommand
     */

            
            // Notify waiting thread
            request.setResponse(response);
            
        } finally {
            readRegion.close();
            bufferManager.releaseBuffer(readBuffer);
        }
    }
    
    private void handleRdmaWrite(Smb2WriteRequest request) throws IOException {
        // Register write data buffer for RDMA

        buffer[0] = 0x42;

        transaction.setBuffer(buffer);

        byte[] released = transaction.releaseBuffer();
        assertSame(buffer, released);
        assertEquals(0x42, released[0]);

        // After release, getting buffer again should return null
        assertNull(transaction.releaseBuffer());
    }

    @Test
    @DisplayName("Test subCommand getter and setter")
    void testSubCommand() {

        byte[] testBuffer = new byte[1024];
        response.setBuffer(testBuffer);

        byte[] releasedBuffer = response.releaseBuffer();
        assertSame(testBuffer, releasedBuffer);

        // After release, the buffer should be null
        assertNull(response.releaseBuffer());
    }

    @Test
    @DisplayName("Test hasMoreElements inherited behavior")
    void testHasMoreElements() {

        response.setBuffer(buffer);

        byte[] released = response.releaseBuffer();
        assertSame(buffer, released);
        assertEquals(0x42, released[0]);
        assertEquals(0x43, released[1]);

        // After release, getting buffer again should return null
        assertNull(response.releaseBuffer());
    }

    @Test
    @DisplayName("Test subCommand getter and setter")

                        // Test release performance
                        long releaseStart = System.nanoTime();
                        BufferCache.releaseBuffer(buffer);
                        long releaseEnd = System.nanoTime();
                        totalReleaseTime.addAndGet(releaseEnd - releaseStart);
                        releases.incrementAndGet();
                    }

    @Test
    public void testReleaseBuffer() {
        ByteBuffer buffer = bufferManager.allocateBuffer(1024);

        // Release should not throw exception
        assertDoesNotThrow(() -> bufferManager.releaseBuffer(buffer));
    }

    @Test
    public void testStatistics() throws Exception {
        long initialAllocated = bufferManager.getTotalAllocated();

                off += stub_frag_len;
            }

            buf = new NdrBuffer(stub, 0);
            msg.decode(buf);
        } finally {
            jcifs.smb1.smb1.BufferCache.releaseBuffer(stub);
        }

        de = msg.getResult();
        if (de != null) {
            throw de;
        }
    }

    /**
     * Sets the security provider for this handle

                            response_map.remove(req);
                        }
                    }
                } finally {
                    BufferCache.releaseBuffer(req.txn_buf);
                    BufferCache.releaseBuffer(resp.txn_buf);
                }

            } else {
                response.command = request.command;
                super.sendrecv(request, response, RESPONSE_TIMEOUT);