return enc;
    }


    private static AvPair parseAvPair ( int avId, byte[] raw ) {
        switch ( avId ) {
        case AvPair.MsvAvFlags:
            return new AvFlags(raw);
        case AvPair.MsvAvTimestamp:
            return new AvTimestamp(raw);
        case AvPair.MsvAvTargetName:
            return new AvTargetName(raw);
        case AvPair.MsvAvSingleHost:
            return new AvSingleHost(raw);