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[unix-history] / usr / src / sbin / XNSrouted / interface.h

/*
 * Copyright (c) 1983 The Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)interface.h	5.5 (Berkeley) %G%
 */

/*
 * Routing table management daemon.
 */

/*
 * An ``interface'' is similar to an ifnet structure,
 * except it doesn't contain q'ing info, and it also
 * handles ``logical'' interfaces (remote gateways
 * that we want to keep polling even if they go down).
 * The list of interfaces which we maintain is used
 * in supplying the gratuitous routing table updates.
 * We list only one address for  each interface, the AF_XNS one.
 */
#define NIFADDR 3
struct interface {
	struct	interface *int_next;
	struct	sockaddr int_addr;		/* address on this host */
	union {
		struct	sockaddr intu_broadaddr;
		struct	sockaddr intu_dstaddr;
	} int_intu;
#define	int_broadaddr	int_intu.intu_broadaddr	/* broadcast address */
#define	int_dstaddr	int_intu.intu_dstaddr	/* other end of p-to-p link */
	int	int_metric;			/* init's routing entry */
	int	int_flags;			/* see below */
	struct	ifdebug int_input, int_output;	/* packet tracing stuff */
	int	int_ipackets;			/* input packets received */
	int	int_opackets;			/* output packets sent */
	char	*int_name;			/* from kernel if structure */
	u_short	int_transitions;		/* times gone up-down */
/*XNS Specific entry */
	struct	sameq {
		struct sameq *n;		/* q of other pt-to-pt links */
		struct sameq *p;		/* with same net # */
	}	int_sq;
};

/*
 * 0x1 to 0x10 are reused from the kernel's ifnet definitions,
 * the others agree with the RTS_ flags defined elsewhere.
 */
#define	IFF_UP		0x1		/* interface is up */
#define	IFF_BROADCAST	0x2		/* broadcast address valid */
#define	IFF_DEBUG	0x4		/* turn on debugging */
#define	IFF_ROUTE	0x8		/* routing entry installed */
#define	IFF_POINTOPOINT	0x10		/* interface is point-to-point link */

#define	IFF_PASSIVE	0x2000		/* can't tell if up/down */
#define	IFF_INTERFACE	0x4000		/* hardware interface */
#define	IFF_REMOTE	0x8000		/* interface isn't on this machine */

struct	interface *if_ifwithaddr();
struct	interface *if_ifwithdstaddr();
struct	interface *if_ifwithnet();
struct	interface *if_iflookup();