byte[] buffer = new byte[32];
        // Mock data for FsFullSizeInformation
        writeInt8(3000, buffer, 0); // total allocation units
        writeInt8(1500, buffer, 8); // caller available allocation units
        writeInt8(1500, buffer, 16); // actual free units (skipped)
        writeInt4(4, buffer, 24); // sectors per allocation unit
        writeInt4(8192, buffer, 28); // bytes per sector

     */
    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        SMBUtil.writeInt8(this.sourceOffset, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt8(this.targetOffset, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt4(this.length, dst, dstIndex);
        dstIndex += 4;
        dstIndex += 4; // reserved
        return dstIndex - start;
    }

        SMBUtil.writeInt4(0, buffer, headerStart + 16);
        // Next command
        SMBUtil.writeInt4(0, buffer, headerStart + 20);
        // Message ID
        SMBUtil.writeInt8(1, buffer, headerStart + 24);
        // Reserved/Async ID
        SMBUtil.writeInt8(0, buffer, headerStart + 32);
        // Session ID
        SMBUtil.writeInt8(0, buffer, headerStart + 40);
        // Signature

     */
    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        SMBUtil.writeInt8(this.offset, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt8(this.length, dst, dstIndex);
        dstIndex += 8;

        SMBUtil.writeInt4(this.flags, dst, dstIndex);
        dstIndex += 4;
        dstIndex += 4; // Reserved
        return dstIndex - start;
    }

     */
    @Override
    public int encode(final byte[] dst, int dstIndex) {
        final int start = dstIndex;
        SMBUtil.writeInt8(this.allocationSize, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt8(this.endOfFile, dst, dstIndex);
        dstIndex += 8;
        SMBUtil.writeInt4(this.numberOfLinks, dst, dstIndex);
        dstIndex += 4;
        dst[dstIndex] = (byte) (this.deletePending ? 1 : 0);

        assertEquals(0, (dst[5] << 8) | (dst[4] & 0xFF));
    }

    @Test
    void testWriteDataWireFormat() {
        // Given
        // writeInt8 writes 8 bytes but needs to access dst[dstIndex+7]
        // Total bytes written: 8+8+8+8+2+6=40
        // But writeInt8 at position 34 needs to access position 34+7=41
        // So we need at least 42 bytes in the array
        byte[] dst = new byte[42];

        // When

        SMBUtil.writeInt4(this.originalMessageSize, dst, dstIndex);
        dstIndex += 4;

        // Reserved (2 bytes)
        SMBUtil.writeInt2(0, dst, dstIndex);
        dstIndex += 2;

        // Flags (2 bytes)
        SMBUtil.writeInt2(this.flags, dst, dstIndex);
        dstIndex += 2;

        // Session ID (8 bytes)
        SMBUtil.writeInt8(this.sessionId, dst, dstIndex);

        dst[dstIndex + 3] = (byte) (val >> 24);
    }

    private void writeInt8(long val, byte[] dst, int dstIndex) {
        writeInt4((int) (val & 0xFFFFFFFFL), dst, dstIndex);
        writeInt4((int) (val >> 32), dst, dstIndex + 4);
    }

    private void writeTime(long t, byte[] dst, int dstIndex) {
        writeInt8(t, dst, dstIndex);
    }

        // EndOfFile
        SMBUtil.writeInt8(0, buffer, dataOffset + 40);
        // AllocationSize
        SMBUtil.writeInt8(0, buffer, dataOffset + 48);
        // ExtFileAttributes
        SMBUtil.writeInt4(0, buffer, dataOffset + 56);
        // FileNameLength
        SMBUtil.writeInt4(8, buffer, dataOffset + 60);
        // EaSize
        SMBUtil.writeInt4(0, buffer, dataOffset + 64);

     * @param val the value to write
     * @param dst the destination byte array
     * @param dstIndex the starting index in the destination array
     */
    public static void writeInt8(long val, final byte[] dst, int dstIndex) {
        dst[dstIndex] = (byte) val;
        dstIndex++;
        dst[dstIndex] = (byte) (val >>= 8);
        dst[++dstIndex] = (byte) (val >>= 8);