/* Our own header for the programs that need interface configuration info.   Include this file, instead of "unp.h". */#ifndef	__unp_ifi_h#define	__unp_ifi_h#include	"unp.h"#include	<net/if.h>#define	IFI_NAME	16			/* same as IFNAMSIZ in <net/if.h> */#define	IFI_HADDR	 8			/* allow for 64-bit EUI-64 in future */struct ifi_info {  char    ifi_name[IFI_NAME];	/* interface name, null terminated */  u_char  ifi_haddr[IFI_HADDR];	/* hardware address */  u_short ifi_hlen;				/* #bytes in hardware address: 0, 6, 8 */  short   ifi_flags;			/* IFF_xxx constants from <net/if.h> */  short   ifi_myflags;			/* our own IFI_xxx flags */  struct sockaddr  *ifi_addr;	/* primary address */  struct sockaddr  *ifi_brdaddr;/* broadcast address */  struct sockaddr  *ifi_dstaddr;/* destination address */  struct ifi_info  *ifi_next;	/* next of these structures */};#define	IFI_ALIAS	1			/* ifi_addr is an alias */					/* function prototypes */struct ifi_info	*get_ifi_info(int, int);struct ifi_info	*Get_ifi_info(int, int);void			 free_ifi_info(struct ifi_info *);#endif	/* __unp_ifi_h */