515 struct parm {  struct
516 	struct parm 	*parm_next;  argument
517 	in_addr_t	parm_net;  argument
518 	in_addr_t	parm_mask;  argument
519 	in_addr_t	parm_ripout_addr;  argument
520 	uint32_t	parm_int_state;  argument
521 	int32_t		parm_rdisc_pref;	/* signed IRDP preference */  argument
522 	uint32_t	parm_rdisc_int;		/* IRDP advertising interval */  argument
523 	struct auth 	parm_auth[MAX_AUTH_KEYS];  argument
524 	char		parm_name[IF_NAME_LEN+1];  argument
525 	uint8_t		parm_d_metric;  argument