*/
    boolean isPermanent ( CIFSContext tc ) throws UnknownHostException;


    /**
     * Retrieves the MAC address of the remote network interface. Samba returns all zeros.
     * 
     * @param tc
     *            context to use
     *
     * @return the MAC address as an array of six bytes
     * @throws UnknownHostException
     *             if the host cannot be resolved to

        writeInt8( 0L, dst, dstIndex ); dstIndex += 8;
/* Samba 2.2.7 needs ATTR_NORMAL
 */
        writeInt2( 0x80 | attributes, dst, dstIndex ); dstIndex += 2; 
                                        /* 6 zeros observed with NT */
        writeInt8( 0L, dst, dstIndex ); dstIndex += 6;

                /* Also observed 4 byte alignment but we stick
                 * with the default for jCIFS which is 2 */

        byte[] keybytes = key.getEncoded();
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keybytes, "AES"), new IvParameterSpec(ZERO_IV, 0, ZERO_IV.length));
        if ( constant.length != cipher.getBlockSize() ) {
            constant = expandNFold(constant, cipher.getBlockSize());
        }
        byte[] enc = constant;

        int start = dstIndex;

        writeInt2( informationLevel, dst, dstIndex );
        dstIndex += 2;

        /* windows98 has what appears to be another 4 0's followed by the share
         * name as a zero terminated ascii string "\TMP" + '\0'
         *
         * As is this works, but it deviates from the spec section 4.1.6.6 but
         * maybe I should put it in. Wonder what NT does?
         */

        SMBUtil.writeInt2(mapInformationLevel(this.informationLevel), dst, dstIndex);
        dstIndex += 2;

        /*
         * windows98 has what appears to be another 4 0's followed by the share
         * name as a zero terminated ascii string "\TMP" + '\0'
         *
         * As is this works, but it deviates from the spec section 4.1.6.6 but
         * maybe I should put it in. Wonder what NT does?
         */

        }

        if ( usage == 0 ) {
            if ( log.isTraceEnabled() ) {
                log.trace("Transport usage dropped to zero " + this);
            }
        }
        else if ( usage < 0 ) {
            throw new RuntimeCIFSException("Usage count dropped below zero");
        }
    }


    /**
     * {@inheritDoc}
     *
     * @see java.lang.Object#finalize()
     */

     */
    public boolean isEmpty () {
        return this.sub_authority_count == 0;
    }


    /**
     * 
     * @return whether the SID is blank (all sub-authorities zero)
     */
    public boolean isBlank () {
        boolean blank = true;
        for ( int sub : this.sub_authority )
            blank = blank && ( sub == 0 );
        return blank;
    }


    /**

    }


    @Override
    protected int writeDataWireFormat ( byte[] dst, int dstIndex ) {
        int start = dstIndex;
        dstIndex += this.info.encode(dst, dstIndex);

        /* 6 zeros observed with NT */
        SMBUtil.writeInt8(0L, dst, dstIndex);
        dstIndex += 6;

        /*
         * Also observed 4 byte alignment but we stick
         * with the default for jCIFS which is 2

    public boolean isPermanent() throws UnknownHostException {
        checkNodeStatusData();
        return isPermanent;
    }

/** 
 * Retrieves the MAC address of the remote network interface. Samba returns all zeros.
 *
 * @return the MAC address as an array of six bytes
 * @throws UnknownHostException if the host cannot be resolved to
 * determine the MAC address.
 */ 

                                        buffer[bufferIndex + len + 1] != (byte)0x00 ) {
                            len += 2;
                            if( len > 256 ) {
                                throw new RuntimeException( "zero termination not found" );
                            }
                        }
                        server.oemDomainName = new String( buffer, bufferIndex,
                                len, UNI_ENCODING );