if ( tf.getConfig().isDfsDisabled() || tf.getCredentials().getUserDomain() == null || tf.getCredentials().getUserDomain().isEmpty() ) {
            return null;
        }

        if ( this._domains != null && System.currentTimeMillis() > this._domains.expiration ) {
            this._domains = null;
        }
        if ( this._domains != null )
            return this._domains.map;
        try {

                break;
            }
        }
        if (authMethod == null) return null;
        NtlmMessage message = (authorization != null) ?
                new Type2Message(Base64.decode(authorization)) : null;
        reconnect();
        if (message == null) {
            message = new Type1Message();
            if (LM_COMPATIBILITY > 2) {

        if( domain == null || username == null ||
                                    ansiHash == null || unicodeHash == null ) {
            throw new IllegalArgumentException( "External credentials cannot be null" );
        }
        this.domain = domain;
        this.username = username;
        this.password = null;
        this.challenge = challenge;
        this.ansiHash = ansiHash;

                        state = 0;
                        thread = null;
                        throw new TransportException( "Connection timeout" );
                    case 2:
                        if (te != null) { /* doConnect throw Exception */
                            state = 4;                        /* error */
                            thread = null;
                            throw te;
                        }

            URLStreamHandler handler = (URLStreamHandler)
                    PROTOCOL_HANDLERS.get(protocol);
            if (handler != null) return handler;
            if (factory != null) {
                handler = factory.createURLStreamHandler(protocol);
            }
            if (handler == null) {
                String path = System.getProperty(HANDLER_PKGS_PROPERTY);

            this.thread = null;
            this.state = 6;
            break;
        default:
            log.error("Invalid state: " + this.state);
            this.thread = null;
            this.state = 6;
            break;
        }

        if ( ioe != null )
            throw ioe;

        return false;
    }


    @Override

    private SmbAuthException sae;

    private void reset() {
        url = null;
        sae = null;
    }

/**
Set the default <tt>NtlmAuthenticator</tt>. Once the default authenticator is set it cannot be changed. Calling this metho again will have no effect.
 */

    public synchronized static void setDefault( NtlmAuthenticator a ) {
        if( auth != null ) {
            return;
        }
        auth = a;
    }

        boolean wasOpen = isOpen();
        this.open = false;
        if ( this.input != null ) {
            this.input.close();
            this.input = null;
        }

        if ( this.output != null ) {
            this.output.close();
            this.output = null;
        }

        try {
            if ( wasOpen ) {
                this.handle.close();
            }

            di += 4;
        }
        return dst;
    }

    int type;
    String domainName = null;
    String acctName = null;
    String origin_server = null;
    CIFSContext origin_ctx = null;


    /**
     * Construct a SID from it's binary representation.
     *
     * 
     * @param src
     * @param si
     */

     */
    protected static DcerpcBinding parseBinding ( String str ) throws DcerpcException {
        int state, mark, si;
        char[] arr = str.toCharArray();
        String proto = null, key = null;
        DcerpcBinding binding = null;

        state = mark = si = 0;
        do {
            char ch = arr[ si ];

            switch ( state ) {
            case 0:
                if ( ch == ':' ) {