*/
    @Override
    public SmbSessionImpl getSmbSession(final CIFSContext tf) {
        return getSmbSession(tf, null, null);
    }

    /**
     *
     * @param tf
     *            context to use
     * @return a session for the context
     */
    @Override
    @SuppressWarnings("resource")
    public synchronized SmbSessionImpl getSmbSession(final CIFSContext tf, String targetHost, String targetDomain) {

                        /*
                         * preauthentication
                         */
                        try (SmbSessionImpl smbSession = trans.getSmbSession(getContext().withDefaultCredentials());
                                SmbTreeImpl t = smbSession.getSmbTree(getContext().getConfig().getLogonShare(), null)) {
                            t.treeConnect(null, null);