h[1] = (byte) ((length >> 16) & 0x01);
        h[2] = (byte) ((length >> 8) & 0xFF);
        h[3] = (byte) (length & 0xFF);
        return h;
    }

    /**
     * Creates a NetBIOS keep-alive header.
     * Keep-alive packets have type 0x85 and zero length.
     */
    private static byte[] keepAliveHeader() {
        byte[] h = new byte[4];
        h[0] = (byte) SessionServicePacket.SESSION_KEEP_ALIVE;

        for (ChannelInfo channel : channels.values()) {
            if (channel.getIdleTime() > 60000) { // 1 minute idle
                // Send keep-alive
                try {
                    sendKeepAlive(channel);
                } catch (Exception e) {
                    log.debug("Keep-alive failed for channel {}", channel.getChannelId());
                    handleChannelFailure(channel, e);
                }
            }

        // Referral flags (2 bytes)
        SMBUtil.writeInt2(0, buffer, 14);

        // Proximity (2 bytes for v3)
        SMBUtil.writeInt2(0, buffer, 16);

        // Time to live (2 bytes for v3)
        SMBUtil.writeInt2(300, buffer, 18);

        // DFS path offset (2 bytes) - points to string data
        SMBUtil.writeInt2(stringDataStart - 8, buffer, 20); // Offset from start of referral

        } finally {
            if (task != null) {
                task.cancel();
            }
            if (p != null && p.isAlive()) {
                logger.warn("Process {} is still alive in finally block. Forcing destruction.", p);
                if (task == null) {
                    task = new ProcessDestroyer(p, ist, commandDestroyTimeout);
                }
                if (!task.isExecuted()) {

    /**
     * Set the authentication time-to-live in milliseconds
     *
     * @param ttl time-to-live in milliseconds (0 or negative for no expiration)
     */
    public void setAuthenticationTTL(long ttl) {
        this.authenticationTTL = ttl;
    }

    /**
     * Get the authentication time-to-live in milliseconds
     *
     * @return time-to-live in milliseconds
     */

     * If the config has a timeToLive value, calculates expiration from current time.
     * Otherwise, returns the stored document expiration time.
     *
     * @param config the crawling configuration containing time-to-live settings
     * @return the document expiration date, or null if no expiration is set
     */
    public Date getDocumentExpires(final CrawlingConfig config) {
        if (config != null) {

                + (this.expiration - System.currentTimeMillis()) + "]";
    }

    /**
     * Get the time to live for this referral
     *
     * @return the ttl
     */
    public long getTtl() {
        return this.ttl;
    }

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

        return this.pipe;
    }

    @Override
    public SmbTreeHandleImpl ensureTreeConnected() throws CIFSException {
        if (this.treeHandle == null) {
            // extra acquire to keep the tree alive
            this.treeHandle = this.pipe.ensureTreeConnected();
        }
        return this.treeHandle.acquire();
    }

    public String getUncPath() {
        return this.uncPath;
    }

            }

        }
    }

    /**
     * Use a exclusive connection for this tree
     *
     * If an exclusive connection is used the caller must make sure that the tree handle is kept alive,
     * otherwise the connection will be disconnected once the usage drops to zero.
     *
     * @param np
     *            whether to use an exclusive connection
     */
    void setNonPooled(final boolean np) {

        for (ChannelInfo channel : channels.values()) {
            if (channel.getIdleTime() > 60000) {  // 1 minute idle
                // Send keep-alive
                try {
                    sendKeepAlive(channel);
                } catch (Exception e) {
                    log.debug("Keep-alive failed for channel {}", channel.getChannelId());
                    handleChannelFailure(channel, e);
                }
            }