SMBUtil.writeInt2(50, buffer, bufferIndex + 2);
        // Set buffer length
        SMBUtil.writeInt4(8, buffer, bufferIndex + 4);

        // Mock getHeaderStart
        response = spy(response);
        when(response.getHeaderStart()).thenReturn(0);

        // Write FileInternalInfo data at the buffer offset
        // FileInternalInfo expects 8 bytes (IndexNumber as int8)

        SMBUtil.writeInt2(80, buffer, bufferIndex + 2);
        // Set buffer length (empty directory)
        SMBUtil.writeInt4(0, buffer, bufferIndex + 4);

        // Mock getHeaderStart
        response = spy(response);
        when(response.getHeaderStart()).thenReturn(0);

        int result = response.readBytesWireFormat(buffer, bufferIndex);

        assertEquals(8, result); // Structure size (2) + offset (2) + length (4)

        dstIndex += 4; // createContextOffset
        final int createContextLengthOffset = dstIndex;
        dstIndex += 4; // createContextLength

        SMBUtil.writeInt2(dstIndex - getHeaderStart(), dst, nameOffsetOffset);

        System.arraycopy(nameBytes, 0, dst, dstIndex, nameBytes.length);
        if (nameBytes.length == 0) {
            // buffer must contain at least one byte
            dstIndex++;

        @Test
        @DisplayName("Should get header start")
        void testGetHeaderStart() {
            assertEquals(0, testMessage.getHeaderStart());
            byte[] buffer = new byte[1024];
            testMessage.encode(buffer, 100);
            assertEquals(100, testMessage.getHeaderStart());
        }

        @Test
        @DisplayName("Should get length")
        void testGetLength() {

        bufferIndex += 4;

        if (createContextOffset > 0 && createContextLength > 0) {
            final List<CreateContextResponse> contexts = new LinkedList<>();
            int createContextStart = getHeaderStart() + createContextOffset;
            int next = 0;
            do {
                int cci = createContextStart;
                next = SMBUtil.readInt4(buffer, cci);
                cci += 4;

        if (securityBufferOffset < 0) {
            throw new SMBProtocolDecodingException("Invalid security buffer offset: " + securityBufferOffset + " (must be non-negative)");
        }

        final int hdrStart = getHeaderStart();
        if (securityBufferLength > 0) {
            // Validate that security buffer doesn't exceed available data
            if (hdrStart + securityBufferOffset < hdrStart || // Check for integer overflow

        request.setInfo(mockInfo);

        // Set up header start for offset calculation
        try {
            Method getHeaderStartMethod = ServerMessageBlock2.class.getDeclaredMethod("getHeaderStart");
            getHeaderStartMethod.setAccessible(true);

            // Create a buffer and write
            byte[] buffer = new byte[256];
            int bytesWritten = request.writeBytesWireFormat(buffer, 64);

            // Verify data offset is written correctly
            int dataOffsetValue = SMBUtil.readInt2(buffer, headerStart + 2);
            assertEquals(headerStart - 0 + 48, dataOffsetValue); // Assuming getHeaderStart() returns 0

            // Verify data is copied
            assertArrayEquals(data, Arrays.copyOfRange(buffer, headerStart + 48, headerStart + 48 + data.length));

            // Verify total bytes written

        return this.errorContextCount;
    }

    /**
     * Gets the header start position for this message.
     *
     * @return the headerStart
     */
    public final int getHeaderStart() {
        return this.headerStart;
    }

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

            this.retainPayload = retain;
        }

        public byte[] getRawPayload() {
            return rawPayload;
        }

        // Expose headerStart for testing
        public int getHeaderStart() {
            return headerStart;
        }
    }

    /**
     * Test implementation of SmbComNTCreateAndXResponse for testing
     */