public SecurityDescriptor(byte[] buffer, int bufferIndex, int len) throws IOException {
        this.decode(buffer, bufferIndex, len);
    }
    public int decode(byte[] buffer, int bufferIndex, int len) throws IOException {
        int start = bufferIndex;

        bufferIndex++; // revision
        bufferIndex++;
        type = ServerMessageBlock.readInt2(buffer, bufferIndex);
        bufferIndex += 2;

        bufferIndex += 2;
        int ownerUOffset = SMBUtil.readInt4(buffer, bufferIndex); // offset to owner sid
        bufferIndex += 4;
        int ownerGOffset = SMBUtil.readInt4(buffer, bufferIndex); // offset to group sid
        bufferIndex += 4;
        SMBUtil.readInt4(buffer, bufferIndex); // offset to sacl
        bufferIndex += 4;
        int daclOffset = SMBUtil.readInt4(buffer, bufferIndex);

        if ( ownerUOffset > 0 ) {

            bufferIndex += 2;
            flags = readInt2( buffer, bufferIndex );
            bufferIndex += 2;
            if( version == 3 ) {
                proximity = readInt2( buffer, bufferIndex );
                bufferIndex += 2;
                ttl = readInt2( buffer, bufferIndex );
                bufferIndex += 2;
                pathOffset = readInt2( buffer, bufferIndex );

        bufferIndex += 8;

        this.allocationSize = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;
        this.endOfFile = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        this.fileAttributes = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        bufferIndex += 4; // Reserved2

        this.credit = SMBUtil.readInt2(buffer, bufferIndex + 2);
        bufferIndex += 4;

        this.flags = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.nextCommand = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.mid = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

    public int decode ( byte[] buffer, int bufferIndex, int len ) throws SMBProtocolDecodingException {
        int start = bufferIndex;
        this.namedPipeState = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.readDataAvailable = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        this.numberOfMessages = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

    public int decode ( byte[] buffer, int bufferIndex, int len ) throws SMBProtocolDecodingException {
        int start = bufferIndex;
        this.alloc = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        this.free = SMBUtil.readInt8(buffer, bufferIndex);
        bufferIndex += 8;

        this.sectPerAlloc = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

    @Override
    public int decode ( byte[] buffer, int bufferIndex, int len ) {
        int start = bufferIndex;

        this.pathConsumed = SMBUtil.readInt2(buffer, bufferIndex) / 2;
        bufferIndex += 2;
        this.numReferrals = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        this.tflags = SMBUtil.readInt2(buffer, bufferIndex);
        bufferIndex += 4;

     */

    @Override
    public int decode ( byte[] buffer, int bufferIndex ) throws SMBProtocolDecodingException {
        int start = this.headerStart = bufferIndex;

        bufferIndex += readHeaderWireFormat(buffer, bufferIndex);
        bufferIndex += readAndXWireFormat(buffer, bufferIndex);

        int len = bufferIndex - start;
        this.length = len;

        if ( isRetainPayload() ) {

        int securityBufferLength = SMBUtil.readInt2(buffer, bufferIndex + 2);
        bufferIndex += 4;

        int pad = bufferIndex - ( getHeaderStart() + securityBufferOffset );
        this.blob = new byte[securityBufferLength];
        System.arraycopy(buffer, getHeaderStart() + securityBufferOffset, this.blob, 0, securityBufferLength);
        bufferIndex += pad;
        bufferIndex += securityBufferLength;