bufferIndex += 2;
            final int numAces = ServerMessageBlock.readInt4(buffer, bufferIndex);
            bufferIndex += 4;

            if (numAces > 4096) {
                throw new IOException("Invalid SecurityDescriptor");
            }

            aces = new ACE[numAces];
            for (int i = 0; i < numAces; i++) {
                aces[i] = new ACE();

        FileFsFullSizeInformation info = (FileFsFullSizeInformation) response.getInfo();
        assertEquals(2000000L * 16L * 4096L, info.getCapacity());
        assertEquals(800000L * 16L * 4096L, info.getFree()); // This is caller available allocation units
    }

    @Test
    void testReadDataWireFormat_UnsupportedInformationLevel() throws Exception {

        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral("/file");
        assertEquals("/file", getPrivateField(cmd, "path"));
        assertEquals((byte) 0x00, getPrivateField(cmd, "maxSetupCount"));
        assertEquals(4096, getPrivateField(cmd, "maxDataCount"));
    }

    @Test
    @DisplayName("writeSetupWireFormat writes subCommand and padding")
    void testWriteSetup() throws Exception {

    assumeTrue(provider.isAvailable());
    
    ByteBuffer buffer = ByteBuffer.allocateDirect(4096);
    RdmaMemoryRegion region = provider.registerMemory(buffer, 
        EnumSet.of(RdmaAccess.LOCAL_READ, RdmaAccess.REMOTE_READ));
    
    assertNotNull(region);
    assertEquals(4096, region.getSize());
    assertTrue(region.hasAccess(RdmaAccess.LOCAL_READ));
    
    region.close();
}

@Test

    void testSetMaxOutputResponse() {
        setupMockConfig();
        Smb2IoctlRequest request = new Smb2IoctlRequest(mockConfig, TEST_CONTROL_CODE);
        int maxOutput = 4096;

        request.setMaxOutputResponse(maxOutput);

        assertNotNull(request);
    }

    @Test
    @DisplayName("Test setInputData method")
    void testSetInputData() {

        lenient().when(tree.acquire()).thenReturn(tree);
        lenient().when(tree.getConfig()).thenReturn(config);
        lenient().when(config.getListCount()).thenReturn(10);
        lenient().when(config.getListSize()).thenReturn(4096);

        lenient().when(parent.getLocator()).thenReturn(locator);
        lenient().when(locator.getUNCPath()).thenReturn("\\\\SERVER\\Share\\dir\\"); // ends with \\

        // Create URL with registered handler

            SMBUtil.readInt2(buffer, bufferIndex);
            bufferIndex += 2;
            final int numAces = SMBUtil.readInt4(buffer, bufferIndex);
            bufferIndex += 4;

            if (numAces > 4096) {
                throw new SMBProtocolDecodingException("Invalid SecurityDescriptor");
            }

            this.aces = new ACE[numAces];
            for (int i = 0; i < numAces; i++) {

            long changeTime = creationTime + 3000000L;
            SMBUtil.writeInt8(changeTime, buffer, bufferIndex + 32);
            // Allocation Size (8 bytes)
            SMBUtil.writeInt8(4096, buffer, bufferIndex + 40);
            // End of File (8 bytes)
            SMBUtil.writeInt8(1024, buffer, bufferIndex + 48);
            // File Attributes (4 bytes)

        byte[] buffer = new byte[22];
        int idFileSystem = 0xABCDEF00;
        int sectPerAlloc = 4;
        long alloc = 500000L;
        long free = 250000L;
        int bytesPerSect = 4096;

        // Encode test data
        int offset = 0;
        SMBUtil.writeInt4(idFileSystem, buffer, offset);
        offset += 4;
        SMBUtil.writeInt4(sectPerAlloc, buffer, offset);
        offset += 4;

 */
public abstract class ReaderUtil {

    /**
     * Do not instantiate.
     */
    protected ReaderUtil() {
    }

    /** Default buffer size */
    private static final int BUF_SIZE = 4096;

    /**
     * Creates a {@link Reader} to read from a file with the specified encoding.
     *
     * @param is
     *            the input stream (must not be {@literal null})
     * @param encoding