out = (SmbFileOutputStream) pipe.getNamedPipeOutputStream();
        }
        if (isDirect) {
            out.writeDirect(buf, off, length, 1);
            return;
        }
        out.write(buf, off, length);
    }

    @Override
    protected void doReceiveFragment(final byte[] buf, final boolean isDirect) throws IOException {
        int off, flags, length;

        if (buf.length < max_recv) {

        // In real implementation, this would get the native memory address:
        // For direct ByteBuffers, this could be obtained through unsafe operations
        // or DiSNI-specific methods

        if (buffer.isDirect()) {
            // Assign a unique address to each buffer instance
            return bufferAddresses.computeIfAbsent(buffer, b -> addressCounter.getAndIncrement());
        } else {

        assertNotNull(buffer, "Buffer should not be null");
        assertTrue(buffer.capacity() >= 2048, "Buffer should be at least requested size");
        assertTrue(buffer.isDirect(), "Buffer should be direct");
    }

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

        // Release should not throw exception