*/
    public final int getHeaderStart() {
        return this.headerStart;
    }

    /**
     * Gets the total length of this message.
     *
     * @return the length
     */
    public final int getLength() {
        return this.length;
    }

    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = this.headerStart = dstIndex;

     * - 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);
        h[3] = (byte) (length & 0xFF);
        return h;
    }

    /**

                + (challengeBytes == null ? "null" : "<" + challengeBytes.length + " bytes>") + ",context="
                + (contextBytes == null ? "null" : "<" + contextBytes.length + " bytes>") + ",targetInformation="
                + (targetInformationBytes == null ? "null" : "<" + targetInformationBytes.length + " bytes>") + ",flags=0x"
                + jcifs.util.Hexdump.toHexString(getFlags(), 8) + "]";
    }

        sb.append(dm).append(sortOrder);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        sb.append(dm).append(value);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        SMBUtil.writeInt4(messageLength, buffer, bufferIndex + 12);
        System.arraycopy(testData, 0, buffer, bufferIndex + 16, testData.length);

        // Decode
        int bytesDecoded = response.decode(buffer, bufferIndex, buffer.length);

        // Verify results
        assertEquals(namedPipeState, response.getNamedPipeState());
        assertEquals(readDataAvailable, response.getReadDataAvailable());

        // When pointer is non-zero, validate string length
        String testString = "TEST";
        short length = (short) (testString.length() * 2); // Unicode length
        PacUnicodeString unicodeString = new PacUnicodeString(length, length, 100);

        // Should validate string length
        String result = unicodeString.check(testString);
        assertEquals(testString, result);

        // Then - Verify keys are derived and different
        assertNotNull(signingKey300);
        assertNotNull(signingKey311);
        assertEquals(16, signingKey300.length);
        assertEquals(16, signingKey311.length);
        assertFalse(Arrays.equals(signingKey300, signingKey311));
    }

    @Test
    @DisplayName("Should handle different session key sizes")

                                 int length) throws IOException;
    
    /**
     * Perform RDMA write operation
     */
    public abstract void rdmaWrite(RdmaMemoryRegion localRegion,
                                  long remoteAddress,
                                  int remoteKey,
                                  int length) throws IOException;
    
    /**

    }

    @Test
    @DisplayName("accept: length-based filter evaluates negative/zero/positive sizes")
    void accept_lengthBasedFilter_handlesNumericEdges() throws Exception {
        // Arrange: filter that accepts only strictly positive length
        SmbFileFilter filter = f -> f.length() > 0;

        // negative size -> reject
        when(smbFile.length()).thenReturn(-1L);

            // Simulate encoding a string
            offset += (s.length() * 2) + 4; // Length + null terminator + actual string
        }
    }

    // Test for LsarQosInfo
    @Test
    void testLsarQosInfoEncode() throws NdrException {
        lsarpc.LsarQosInfo qosInfo = new lsarpc.LsarQosInfo();
        qosInfo.length = 10;
        qosInfo.impersonation_level = 1;
        qosInfo.context_mode = 2;