if ( host.indexOf('.') < 0 && host.toUpperCase(Locale.ROOT).equals(host) ) {
            // this is not too good, probably should better pass the address and check that it is a netbios one.
            // While we could look up the domain controller/KDC we cannot really make the java kerberos implementation
            // use a KDC of our choice.

                        sbuf[4] == (byte)0xFF &&
                        sbuf[5] == (byte)'S' &&
                        sbuf[6] == (byte)'M' &&
                        sbuf[7] == (byte)'B') {
                break; /* all good */
            }
                                        /* out of phase maybe? */
                          /* inch forward 1 byte and try again */
            for (int i = 0; i < 35; i++) {

    void ensureOpen( int timeout ) throws IOException {
        closeTimeout = 0;
        if( SO_TIMEOUT != 0 ) {
            closeTimeout = Math.max( SO_TIMEOUT, timeout );
        }
        // If socket is still good, the new closeTimeout will
        // be ignored; see tryClose comment.
        if( socket == null ) {
            socket = new DatagramSocket( lport, laddr );

        if ( this.transportContext.getConfig().getNetbiosSoTimeout() != 0 ) {
            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);

    table of data to be supplied by an application program that uses
    the facility, other than as an argument passed when the facility
    is invoked, then you must make a good faith effort to ensure that,
    in the event an application does not supply such function or
    table, the facility still operates, and performs whatever part of
    its purpose remains meaningful.