synchronized ( this.dcLock ) {
            CacheEntry<DfsReferralDataInternal> ce = this.dcCache.get(dom);
            if ( ce != null && System.currentTimeMillis() > ce.expiration ) {
                ce = null;
            }
            if ( ce != null ) {
                DfsReferralDataInternal ri = ce.map.get(DC_ENTRY);
                if ( ri == NEGATIVE_ENTRY ) {
                    return null;
                }

            else if ( type == PacSignature.HMAC_SHA1_96_AES128 || type == PacSignature.HMAC_SHA1_96_AES256 ) {
                KerberosKey key = type == PacSignature.HMAC_SHA1_96_AES128 ? keys.get(PacSignature.ETYPE_AES128_CTS_HMAC_SHA1_96)
                        : keys.get(PacSignature.ETYPE_AES256_CTS_HMAC_SHA1_96);
                if ( key == null ) {
                    throw new PACDecodingException("Missing key");
                }

        return this.max_recv;
    }


    /**
     * @return the max_xmit
     */
    int getMaxXmit () {
        return this.max_xmit;
    }


    /**
     * Get a handle to a service
     * 
     * @param url
     * @param tc
     *            context to use
     * @return a DCERPC handle for the given url
     * @throws MalformedURLException

/**
 * @author mbechler
 *
 */
public class Smb2IoctlRequest extends ServerMessageBlock2Request<Smb2IoctlResponse> implements RequestWithFileId {

    /**
     * 
     */
    public static final int FSCTL_DFS_GET_REFERRALS = 0x0060194;
    /**
     * 
     */
    public static final int FSCTL_PIPE_PEEK = 0x0011400C;
    /**
     * 
     */
    public static final int FSCTL_PIPE_WAIT = 0x00110018;
    /**
     * 

     * @throws CIFSException
     * @throws jcifs.smb.SmbAuthException
     */
    boolean isTrustedDomain ( CIFSContext tf, String domain ) throws CIFSException;


    /**
     * Get a connection to the domain controller for a given domain
     * 
     * @param domain
     * @param tf
     * @return connection
     * @throws CIFSException
     * @throws jcifs.smb.SmbAuthException
     */

 * Handle for receiving change notifications from an SMB server
 * 
 * 
 * @author mbechler
 *
 */
public interface SmbWatchHandle extends AutoCloseable, Callable<List<FileNotifyInformation>> {

    /**
     * Get the next set of changes
     * 
     * Will block until the server returns a set of changes that match the given filter. The file will be automatically

    protected void finalize () throws Throwable {
        if ( !isDisconnected() && this.usageCount.get() != 0 ) {
            log.warn("Session was not properly released");
        }
    }


    /**
     * @return the number of known usages
     */
    protected long getUsageCount () {
        return this.usageCount.get();
    }


    protected abstract long makeKey ( Request request ) throws IOException;

                for ( KerberosKey key : keys ) {
                    keysByAlgo.put(key.getKeyType(), key);
                }

                KerberosKey serverKey = keysByAlgo.get(encType.getValue().intValue());
                if ( keysByAlgo.isEmpty() || serverKey == null ) {
                    throw new PACDecodingException("Kerberos key not found for eType " + encType.getValue());
                }

            }
        }
        return false;
    }


    /**
     * 
     * @param pairs
     * @param type
     * @return first occurance of the given type
     */
    public static AvPair get ( List<AvPair> pairs, int type ) {
        Iterator<AvPair> it = pairs.iterator();
        while ( it.hasNext() ) {
            AvPair p = it.next();
            if ( p.getType() == type ) {
                return p;

        String key = connection.getHeaderFieldKey(0);
        String value = connection.getHeaderField(0);
        for (int i = 1; key != null || value != null; i++) {
            List values = (List) map.get(key);
            if (values == null) {
                values = new ArrayList();
                map.put(key, values);
            }
            values.add(value);
            key = connection.getHeaderFieldKey(i);