// error classes
    /** Success status code */
    public static final int SUCCESS = 0;
    /** Name service error class */
    public static final int ERR_NAM_SRVC = 0x01;
    /** Session service error class */
    public static final int ERR_SSN_SRVC = 0x02;

    // name service error codes
    /** Format error in the name service */
    public static final int FMT_ERR = 0x1;
    /** Server error in the name service */

            dst[dstIndex + 2 * i + 2] = (byte) ((tmp[i] & 0x0F) + 0x41);
        }
        for (; i < 15; i++) {
            dst[dstIndex + 2 * i + 1] = (byte) 0x43;
            dst[dstIndex + 2 * i + 2] = (byte) 0x41;
        }
        dst[dstIndex + TYPE_OFFSET] = (byte) (((this.hexCode & 0xF0) >> 4) + 0x41);
        dst[dstIndex + TYPE_OFFSET + 1] = (byte) ((this.hexCode & 0x0F) + 0x41);

        buffer[bufferIndex++] = 0;
        // securityMode
        buffer[bufferIndex++] = 0x03;
        // maxMpxCount
        buffer[bufferIndex++] = 50;
        buffer[bufferIndex++] = 0;
        // maxNumberVcs
        buffer[bufferIndex++] = 1;
        buffer[bufferIndex++] = 0;
        // maxBufferSize
        buffer[bufferIndex++] = (byte) 0x00;
        buffer[bufferIndex++] = (byte) 0x40;
        buffer[bufferIndex++] = 0;

     * Test constructor with malformed data (too short).
     */
    @Test
    void testConstructorMalformedData() {
        // Prepare data (only 2 bytes, less than an int)
        byte[] data = new byte[] { 0x01, 0x02 };

        // Verify that PACDecodingException is thrown
        assertThrows(PACDecodingException.class, () -> {
            new PacSignature(data);
        });
    }

    /**

    // relative to headerStart
    private static final int SETUP_OFFSET = 61;

    private static final int DISCONNECT_TID = 0x01;
    private static final int ONE_WAY_TRANSACTION = 0x02;

    private int pad;
    private int pad1;
    private boolean parametersDone, dataDone;

    protected int totalParameterCount;
    protected int totalDataCount;

    // relative to headerStart
    static final int SETUP_OFFSET = 61;

    static final int DISCONNECT_TID = 0x01;
    static final int ONE_WAY_TRANSACTION = 0x02;

    private int pad;
    private int pad1;
    private boolean parametersDone, dataDone;

    /** Total number of parameter bytes the server is returning */

    <magic priority="40">
      <match value="0x0A" type="string" offset="0">
        <match value="0x00" type="string" offset="1"/>
        <match value="0x02" type="string" offset="1"/>
        <match value="0x03" type="string" offset="1"/>
        <match value="0x04" type="string" offset="1"/>
        <match value="0x05" type="string" offset="1"/>
      </match>
    </magic>

        @DisplayName("Should write request structure correctly")
        void testWriteBytesWireFormat() {
            // Setup
            request.setPadding((byte) 2);
            request.setReadFlags((byte) 0x01);
            request.setReadLength(4096);
            request.setOffset(8192L);
            request.setMinimumCount(512);
            request.setRemainingBytes(1024);

            byte[] buffer = new byte[256];

        assertEquals(outlen, expanded.length);

        // Test vectors from RFC 3961 Appendix A.1
        // 64-fold("012345")
        verifyNfold("012345", 8,
                new byte[] { (byte) 0xbe, (byte) 0x07, (byte) 0x26, (byte) 0x31, (byte) 0x27, (byte) 0x6b, (byte) 0x19, (byte) 0x55 });

        // 56-fold("password")
        verifyNfold("password", 7,

      return false;
    }

    byte[] bytes = ip.getAddress();

    if ((bytes[8] | (byte) 0x03) != (byte) 0x03) {

      // Verify that high byte of the 64 bit identifier is zero, modulo
      // the U/L and G bits, with which we are not concerned.
      return false;
    }

    return (bytes[9] == (byte) 0x00) && (bytes[10] == (byte) 0x5e) && (bytes[11] == (byte) 0xfe);
  }

  /**