/*
         * Note the Transport thread isn't running yet so we can
         * read from the socket here.
         */
        try {
            this.socket.setSoTimeout(this.transportContext.getConfig().getConnTimeout());
            if ( peekKey() == null ) /* try to read header */
                throw new IOException("transport closed in negotiate");
        }

     * exists and is not marked read-only. By default, resources are
     * considered to be read-only and therefore for <code>smb://</code>,
     * <code>smb://workgroup/</code>, and <code>smb://server/</code> resources
     * will be read-only.
     *
     * @return <code>true</code> if the resource exists is not marked
     *         read-only
     * @throws CIFSException
     */

            Smb2QueryInfoResponse resp = withOpen(
                th,
                Smb2CreateRequest.FILE_OPEN,
                SmbConstants.FILE_READ_ATTRIBUTES | SmbConstants.READ_CONTROL,
                SmbConstants.FILE_SHARE_READ | SmbConstants.FILE_SHARE_WRITE,
                req);
            return resp.getInfo(SecurityDescriptor.class);
        }

            } else {
                t.url = args[ai];
            }
        }

        Thread[] threads = new Thread[t.numThreads];
        int ti;

        for (ti = 0; ti < t.numThreads; ti++) {
            threads[ti] = new Thread(t);
            System.out.print(threads[ti].getName());
            threads[ti].start();
        }

        while (t.numComplete < t.numThreads) {
            long delay;

                Set<Thread> threadsAfter = new HashSet<>(Thread.getAllStackTraces().keySet());
                threadsAfter.removeAll(threadsBefore);

                Set<Thread> leaked = new HashSet<>();
                for ( Thread t : threadsAfter ) {
                    if ( t.getName().startsWith("Transport") ) {

    }


    private static void interruptThreadSafely ( QueryThread thread ) {
        try {
            thread.interrupt();
        }
        catch ( SecurityException e ) {
            e.printStackTrace();
        }
    }


    private static void joinThread ( Thread thread ) {
        try {
            thread.join();
        }
        catch ( InterruptedException e ) {

        // be ignored; see tryClose comment.
        if( socket == null ) {
            socket = new DatagramSocket( lport, laddr );
            thread = new Thread( this, "JCIFS-NameServiceClient" );
            thread.setDaemon( true );
            thread.start();
        }
    }
    void tryClose() {
        synchronized( LOCK ) {

            /* Yes, there is the potential to drop packets

import jcifs.Credentials;
import jcifs.smb.NtlmPasswordAuthenticator;
import jcifs.smb.NtlmPasswordAuthenticator.AuthenticationType;


/**
 * @author mbechler
 *
 */
public abstract class AbstractCIFSContext extends Thread implements CIFSContext {

    private static final Logger log = LoggerFactory.getLogger(AbstractCIFSContext.class);
    private boolean closed;


    /**
     * 
     */
    public AbstractCIFSContext () {

        this.attrs = attrs;
        this.options = options;
        this.tree = tree.acquire();
        this.tree_num = tree.getTreeId();

        if ( cfg.isTraceResourceUsage() ) {
            this.creationBacktrace = Thread.currentThread().getStackTrace();
        }
        else {
            this.creationBacktrace = null;
        }
    }


    /**
     * @param cfg
     * @param fid
     * @param tree

     * may be necessary that an addition thread be used to read and
     * write to a Named Pipe.
     */

    public InputStream getNamedPipeInputStream() throws IOException {
        if( pipeIn == null ) {
            if(( pipeType & PIPE_TYPE_CALL ) == PIPE_TYPE_CALL ||
                    ( pipeType & PIPE_TYPE_TRANSACT ) == PIPE_TYPE_TRANSACT ) {
                pipeIn = new TransactNamedPipeInputStream( this );
            } else {