List<AvPair> pairs = new LinkedList<>();
        int pos = 0;
        boolean foundEnd = false;
        while ( pos + 4 <= data.length ) {
            int avId = SMBUtil.readInt2(data, pos);
            int avLen = SMBUtil.readInt2(data, pos + 2);
            pos += 4;

            if ( avId == AvPair.MsvAvEOL ) {
                if ( avLen != 0 ) {

    static final int CAP_MPX_MODE = 0x0002;
    static final int CAP_UNICODE = 0x0004;
    static final int CAP_LARGE_FILES = 0x0008;
    static final int CAP_NT_SMBS = 0x0010;
    static final int CAP_RPC_REMOTE_APIS = 0x0020;
    static final int CAP_STATUS32 = 0x0040;
    static final int CAP_LEVEL_II_OPLOCKS = 0x0080;
    static final int CAP_LOCK_AND_READ = 0x0100;
    static final int CAP_NT_FIND = 0x0200;

        pos += 8;

        if ( getFlag(NTLMSSP_NEGOTIATE_VERSION) ) {
            System.arraycopy(NTLMSSP_VERSION, 0, type2, pos, NTLMSSP_VERSION.length);
            pos += NTLMSSP_VERSION.length;
        }

        pos += writeSecurityBufferContent(type2, pos, targetNameOff, targetBytes);
        pos += writeSecurityBufferContent(type2, pos, targetInfoOff, targetInformationBytes);

    /**
     * Current position in file
     * 
     * @return current position
     */
    long getFilePointer ();


    /**
     * Seek to new position
     * 
     * @param pos
     */
    void seek ( long pos );


    /**
     * Get the current file length
     * 
     * @return file length
     * @throws SmbException
     */
    long length () throws SmbException;


    /**

    static final int CAP_UNICODE          = 0x0004;
    static final int CAP_LARGE_FILES      = 0x0008;
    static final int CAP_NT_SMBS          = 0x0010;
    static final int CAP_RPC_REMOTE_APIS  = 0x0020;
    static final int CAP_STATUS32         = 0x0040;
    static final int CAP_LEVEL_II_OPLOCKS = 0x0080;
    static final int CAP_LOCK_AND_READ    = 0x0100;
    static final int CAP_NT_FIND          = 0x0200;

            pos += 8;

            if ( ( flags & NTLMSSP_NEGOTIATE_VERSION ) != 0 ) {
                System.arraycopy(NTLMSSP_VERSION, 0, type1, pos, NTLMSSP_VERSION.length);
                pos += NTLMSSP_VERSION.length;
            }

            pos += writeSecurityBufferContent(type1, pos, domOffOff, domain);
            pos += writeSecurityBufferContent(type1, pos, wsOffOff, workstation);

        byte[] offBuf = new byte[cnt];
        int pos = 0;
        while ( pos < cnt ) {
            int r = is.read(offBuf, pos, offBuf.length - pos);
            if ( r < 0 ) {
                fail("EOF while reading");
            }
            pos += r;
        }

        for ( int i = 0; i < offBuf.length; i++ ) {
            if ( offBuf[ i ] != 0 ) {

        }
    }


    @Override
    public long getFilePointer () {
        return this.fp;
    }


    @Override
    public void seek ( long pos ) {
        this.fp = pos;
    }


    @Override
    public long length () throws SmbException {
        return this.file.length();
    }


    @Override

            off += write_andx_resp.count;
        } while( len > 0 );
    }
    public long getFilePointer() throws SmbException {
        return fp;
    }
    public void seek( long pos ) throws SmbException {
        fp = pos;
    }
    public long length() throws SmbException {
        return file.length();
    }
    public void setLength( long newLength ) throws SmbException {
        // ensure file is open