unsigned int has_tlv : 1; /* has sub attributes */
unsigned int is_tlv : 1; /* is a sub attribute */
unsigned int encoded : 1; /* has been put into packet */
+ unsigned int extended : 1; /* extended attribute */
+ unsigned int extended_flags : 1; /* with flag */
int8_t tag; /* tag for tunneled attributes */
uint8_t encrypt; /* encryption method */