buf.enc_ndr_small(this.ptype);
        buf.enc_ndr_small(this.flags);
        buf.enc_ndr_long(0x00000010); /* Little-endian / ASCII / IEEE */
        buf.enc_ndr_short(this.length);
        buf.enc_ndr_short(0); /* length of auth_value */
        buf.enc_ndr_long(this.call_id);
    }

    void decode_header(final NdrBuffer buf) throws NdrException {
        /* RPC major / minor version */

        buf.enc_ndr_long(0x00000010); // data representation
        buf.enc_ndr_short(20); // length
        buf.enc_ndr_short(0); // auth length
        buf.enc_ndr_long(0); // call_id

        // Fault body
        buf.enc_ndr_long(0); // alloc_hint
        buf.enc_ndr_short(0); // context_id
        buf.enc_ndr_short(0); // cancel_count
        buf.enc_ndr_long(0xDEADBEEF); // fault status

            _src.align(4);
            final int _pathp = _src.dec_ndr_long();
            final int _commentp = _src.dec_ndr_long();
            state = _src.dec_ndr_long();
            num_stores = _src.dec_ndr_long();
            final int _storesp = _src.dec_ndr_long();

            if (_pathp != 0) {
                _src = _src.deferred;

        verify(mockNdrBuffer).enc_ndr_referent(translatedName.name.buffer, 1);
        verify(mockNdrBuffer).enc_ndr_long(translatedName.sid_index);

        verify(mockDeferredNdrBuffer).enc_ndr_long(translatedName.name.maximum_length / 2);
        verify(mockDeferredNdrBuffer).enc_ndr_long(0);
        verify(mockDeferredNdrBuffer).enc_ndr_long(translatedName.name.length / 2);

        // Version (WITNESS_VERSION structure)
        if (version != null) {
            buf.enc_ndr_long(version.getMajorVersion());
            buf.enc_ndr_long(version.getMinorVersion());
        } else {
            buf.enc_ndr_long(WITNESS_INTERFACE_VERSION_MAJOR);
            buf.enc_ndr_long(WITNESS_INTERFACE_VERSION_MINOR);
        }

        // NetName (wide string pointer)

            verify(mockNdrBuffer).enc_ndr_referent("system", 1);
            verify(mockNdrBuffer).enc_ndr_string("system");
            verify(mockNdrBuffer).enc_ndr_long(456);
            verify(mockNdrBuffer).enc_ndr_long(123);
        }

        @Test
        @DisplayName("Should encode input with null system name")
        void testEncodeInNullSystemName() throws NdrException {

            verify(mockBuffer).enc_ndr_small(5); // RPC version
            verify(mockBuffer).enc_ndr_long(0x00000010); // Little-endian / ASCII / IEEE
            verify(mockBuffer).enc_ndr_long(message.call_id);
            verify(mockBuffer).enc_ndr_short(message.getOpnum()); // opnum
            verify(mockBuffer).enc_ndr_long(12345); // From TestDcerpcMessage.encode_in
            // Verify header encoding including ptype

            verify(mockNdrBuffer).enc_ndr_referent("system", 1);
            verify(mockNdrBuffer).enc_ndr_string("system");
            verify(mockNdrBuffer).enc_ndr_long(456);
            verify(mockNdrBuffer).enc_ndr_long(123);
        }

        @Test
        @DisplayName("Should encode input with null system name")
        void testEncodeInNullSystemName() throws NdrException {

        buf.enc_ndr_small(0); /* minor version */
        buf.enc_ndr_small(ptype);
        buf.enc_ndr_small(flags);
        buf.enc_ndr_long(0x00000010); /* Little-endian / ASCII / IEEE */
        buf.enc_ndr_short(length);
        buf.enc_ndr_short(0); /* length of auth_value */
        buf.enc_ndr_long(call_id);
    }

    void decode_header(final NdrBuffer buf) throws NdrException {
        /* RPC major / minor version */

            verify(mockNdrBuffer).enc_ndr_long(1000);
            verify(mockNdrBuffer).enc_ndr_long(2000);
        }

        @Test
        @DisplayName("Should decode SID correctly")
        void testSidTDecode() throws NdrException {
            // Given: A SID to decode into
            rpc.sid_t sid = new rpc.sid_t();