dst[dstIndex + OPCODE_OFFSET] = (byte) ((isResponse ? 0x80 : 0x00) + (opCode << 3 & 0x78) + (isAuthAnswer ? 0x04 : 0x00)
                + (isTruncated ? 0x02 : 0x00) + (isRecurDesired ? 0x01 : 0x00));
        dst[dstIndex + OPCODE_OFFSET + 1] = (byte) ((isRecurAvailable ? 0x80 : 0x00) + (isBroadcast ? 0x10 : 0x00) + (resultCode & 0x0F));
        writeInt2(questionCount, dst, start + QUESTION_OFFSET);

        dst[dstIndex + OPCODE_OFFSET] = (byte) ((this.isResponse ? 0x80 : 0x00) + (this.opCode << 3 & 0x78)
                + (this.isAuthAnswer ? 0x04 : 0x00) + (this.isTruncated ? 0x02 : 0x00) + (this.isRecurDesired ? 0x01 : 0x00));
        dst[dstIndex + OPCODE_OFFSET + 1] =
                (byte) ((this.isRecurAvailable ? 0x80 : 0x00) + (this.isBroadcast ? 0x10 : 0x00) + (this.resultCode & 0x0F));
        writeInt2(this.questionCount, dst, start + QUESTION_OFFSET);

    class ToStringTests {

        @Test
        @DisplayName("toString with valid data produces expected format")
        void testToStringWithValidData() {
            byte[] challenge = new byte[] { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0xFF };
            UniAddress dc = mock(UniAddress.class);
            when(dc.toString()).thenReturn("SERVER123");

            NtlmChallenge nc = new NtlmChallenge(challenge, dc);

    void testSubcommandConstants() {
        // Test Trans2 subcommands
        assertEquals((byte) 0x01, SmbComTransaction.TRANS2_FIND_FIRST2);
        assertEquals((byte) 0x02, SmbComTransaction.TRANS2_FIND_NEXT2);
        assertEquals((byte) 0x03, SmbComTransaction.TRANS2_QUERY_FS_INFORMATION);
        assertEquals((byte) 0x05, SmbComTransaction.TRANS2_QUERY_PATH_INFORMATION);

     */
    int DCERPC_FIRST_FRAG = 0x01; /* First fragment */
    /**
     * Last fragment flag - indicates last fragment of a multi-fragment message
     */
    int DCERPC_LAST_FRAG = 0x02; /* Last fragment */
    /**
     * Pending cancel flag - indicates cancel was pending at sender
     */
    int DCERPC_PENDING_CANCEL = 0x04; /* Cancel was pending at sender */
    /**

            assertEquals(0x01, ACE.FLAGS_OBJECT_INHERIT, "FLAGS_OBJECT_INHERIT should be 0x01");
            assertEquals(0x02, ACE.FLAGS_CONTAINER_INHERIT, "FLAGS_CONTAINER_INHERIT should be 0x02");
            assertEquals(0x04, ACE.FLAGS_NO_PROPAGATE, "FLAGS_NO_PROPAGATE should be 0x04");
            assertEquals(0x08, ACE.FLAGS_INHERIT_ONLY, "FLAGS_INHERIT_ONLY should be 0x08");

        new byte[] {
          0x01, (byte) 0xc0, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x14, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x04, 0x00,
          0x00, 0x00, 0x00, 0x14,
          0x00, 0x00, 0x00, 0x18,
          0x28, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00,
          0x02, 0x00, 0x00, 0x00,

    public static final int SMB2_LEASE_NONE           = 0x00;
    public static final int SMB2_LEASE_READ_CACHING   = 0x01;  // R - Read caching
    public static final int SMB2_LEASE_HANDLE_CACHING = 0x02;  // H - Handle caching  
    public static final int SMB2_LEASE_WRITE_CACHING  = 0x04;  // W - Write caching
    
    // Common combinations
    public static final int SMB2_LEASE_READ_HANDLE    = 0x03;  // RH

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PrintStream ps = new PrintStream(baos);

        // Test with control characters and printable characters
        byte[] data = { 0x00, 0x01, 0x09, 0x0A, 0x0D, 0x1F, // Control characters
                0x20, 0x41, 0x42, 0x7E, // Printable characters
                (byte) 0x7F, (byte) 0x80, (byte) 0xFF // Extended/control
        };

        src[srcIndex + 1] = 0x0C; // Pointer offset
        // recordType (2 bytes)
        src[srcIndex + 2] = 0x00;
        src[srcIndex + 3] = 0x20; // NB (0x0020)
        // recordClass (2 bytes)
        src[srcIndex + 4] = 0x00;
        src[srcIndex + 5] = 0x01; // IN (0x0001)
        // ttl (4 bytes)
        src[srcIndex + 6] = 0x00;
        src[srcIndex + 7] = 0x00;
        src[srcIndex + 8] = 0x00;