file.open( openFlags, 0, SmbFile.ATTR_NORMAL, options );
        }

        int r, n;
        SmbComReadAndXResponse response = new SmbComReadAndXResponse( b, off );
        do {
            r = len > readSize ? readSize : len;
            file.send( new SmbComReadAndX( file.fid, fp, r, null ), response );
            if(( n = response.dataLength ) <= 0 ) {
                return (int)((fp - start) > 0L ? fp - start : -1);
            }

            }

            try ( SmbFileHandle h = ensureOpen() ) {}
            this.readSize = th.getReceiveBufferSize() - 70;
            this.writeSize = th.getSendBufferSize() - 70;

            if ( th.hasCapability(SmbConstants.CAP_LARGE_READX) ) {
                this.largeReadX = true;
                this.readSize = Math.min(th.getConfig().getReceiveBufferSize() - 70, th.areSignaturesActive() ? 0xFFFF - 70 : 0xFFFFFF - 70);