*
 * <p>"IPv4 mapped" addresses were originally a representation of IPv4 addresses for use on an IPv6
 * socket that could receive both IPv4 and IPv6 connections (by disabling the {@code IPV6_V6ONLY}
 * socket option on an IPv6 socket). Yes, it's confusing. Nevertheless, these "mapped" addresses
 * were never supposed to be seen on the wire. That assumption was dropped, some say mistakenly, in

   * <ol>
   *   <li>Use sendfile(2) or equivalent. Requires that both the input channel and the output
   *       channel have their own file descriptors. Generally this only happens when both channels
   *       are files or sockets. This performs zero copies - the bytes never enter userspace.
   *   <li>Use mmap(2) or equivalent. Requires that either the input channel or the output channel

                boolean closed = msg != null && msg.equals("Socket closed");

                if ( closed ) {
                    log.trace("Remote closed connection");
                }
                else if ( timeout ) {
                    log.debug("socket timeout in non peek state", ex);
                }
                else {

    /* Construct the shared static client object that will
     * conduct all encoding and decoding of NetBIOS name service
     * messages as well as socket IO in a synchronized fashon.
     */

    private static final NameServiceClient CLIENT = new NameServiceClient();

    private static final int DEFAULT_CACHE_POLICY = 30;

             * because we might close the socket during a
             * request. However the chances are slim and the
             * retry code should ensure the overall request
             * is serviced. The alternative complicates things
             * more than I think is worth it.
             */

            if( socket != null ) {
                socket.close();
                socket = null;
            }

            this.closeTimeout = Math.max(this.transportContext.getConfig().getNetbiosSoTimeout(), timeout);
        }
        // If socket is still good, the new closeTimeout will
        // be ignored; see tryClose comment.
        if ( this.socket == null ) {
            this.socket = new DatagramSocket(this.lport, this.laddr);
            this.thread = new Thread(this, "JCIFS-NameServiceClient");

        do {
/* These Socket constructors attempt to connect before SO_TIMEOUT can be applied
            if (localAddr == null) {
                socket = new Socket( address.getHostAddress(), 139 );
            } else {
                socket = new Socket( address.getHostAddress(), 139, localAddr, localPort );
            }
            socket.setSoTimeout( SO_TIMEOUT );
*/

     * 
     * Property <tt>jcifs.smb.client.soTimeout</tt> (int, default 35000)
     * 
     * @return socket timeout, in milliseconds
     */
    int getSoTimeout ();


    /**
     * 
     * Property <tt>jcifs.smb.client.connTimeout</tt> (int, default 35000)
     * 
     * @return timeout for establishing a socket connection, in milliseconds
     */
    int getConnTimeout ();


    /**