return 0;
    }

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

        dst[dstIndex] = (byte) 0x04;
        dstIndex++;
        dstIndex += writeString(path, dst, dstIndex);

        return dstIndex - start;
    }

    @Override
    int readParameterWordsWireFormat(final byte[] buffer, final int bufferIndex) {

        // Expected format: buffer format (1 byte) + file name (null-terminated)
        int expectedLength = 1 + TEST_FILE_NAME.length() + 1;
        assertEquals(expectedLength, bytesWritten);
        assertEquals(0x04, dst[0]); // Buffer format
        assertEquals(TEST_FILE_NAME, new String(dst, 1, TEST_FILE_NAME.length()));
    }

    @Test
    public void testReadParameterWordsWireFormat() {

@DisplayName("Hexdump Utility Tests")
class HexdumpTest extends BaseTest {

    @Test
    @DisplayName("Should convert byte array to hex string")
    void testToHexString() {
        // Given
        byte[] data = { 0x00, 0x0F, (byte) 0xFF, 0x7F, (byte) 0x80 };

        // When
        String result = Hexdump.toHexString(data);

        // Then
        assertNotNull(result);
        assertEquals("000FFF7F80", result);
    }

    void testConstructor() 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")

    }

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

        dst[dstIndex] = (byte) 0x04;
        dstIndex++;
        dstIndex += writeString(oldFileName, dst, dstIndex);
        dst[dstIndex++] = (byte) 0x04;
        if (useUnicode) {
            dst[dstIndex++] = (byte) '\0';
        }
        dstIndex += writeString(newFileName, dst, dstIndex);

        // SMB1 header
        validator.validateSmbHeader(0x424D53FF, 32, 0x72);

        // SMB2 header
        validator.validateSmbHeader(0x424D53FE, 64, 0x00);
    }

    @Test
    public void testInvalidProtocolId() throws Exception {
        assertThrows(SmbException.class, () -> {
            validator.validateSmbHeader(0xDEADBEEF, 64, 0x00);
        });
    }

    @Test

        return 0;
    }

    @Override
    int readParameterWordsWireFormat(final byte[] buffer, int bufferIndex) {
        final int start = bufferIndex;
        isLoggedInAsGuest = ((buffer[bufferIndex] & 0x01) == 0x01) == true;
        bufferIndex += 2;
        if (extendedSecurity) {
            final int blobLength = readInt2(buffer, bufferIndex);
            bufferIndex += 2;
            blob = new byte[blobLength];
        }

     * The header format is:
     * - Byte 0: Message type (0x00 for SESSION_MESSAGE)
     * - Byte 1: High bit of 17-bit length field
     * - Bytes 2-3: Lower 16 bits of length field
     */
    private static byte[] messageHeader(int length) {
        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_MESSAGE;
        h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);

        // per bouncycastle
        // <li>1: K(i) := PRF( KI, [i]_2 || Label || 0x00 || Context || [L]_2 ) with the counter at the very beginning
        // of the fixedInputData (The default implementation has this format)</li>
        // with the parameters
        // <li>1. KDFCounterParameters(ki, null, "Label || 0x00 || Context || [L]_2]", 8);

        // all fixed inputs go into the suffix:
        // + label

        return 0;
    }

    @Override
    protected int writeBytesWireFormat(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        dst[dstIndex] = (byte) 0x04;
        dstIndex++;
        dstIndex += writeString(this.path, dst, dstIndex);
        return dstIndex - start;
    }

    @Override