/* $Copyright:	$
 * Copyright (c) 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
 * Sequent Computer Systems, Inc.   All rights reserved.
 *  
 * This software is furnished under a license and may be used
 * only in accordance with the terms of that license and with the
 * inclusion of the above copyright notice.   This software may not
 * be provided or otherwise made available to, or used by, any
 * other person.  No title to or ownership of the software is
 * hereby transferred. */

/* $Header: interface.h 2.4 91/03/20 $ */

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. Neither the name of the University nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)interface.h	5.6 (Berkeley) 6/1/90
 */

/*
 * 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.
 */
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 */
	/* START INTERNET SPECIFIC */
	u_long	int_net;			/* network # */
	u_long	int_netmask;			/* net mask for addr */
	u_long	int_subnet;			/* subnet # */
	u_long	int_subnetmask;			/* subnet mask for addr */
	/* END INTERNET SPECIFIC */
	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 */
};

/*
 * 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_LOOPBACK	0x8		/* software loopback net */
#define	IFF_POINTOPOINT	0x10		/* interface is point-to-point link */

#define	IFF_SUBNET	0x1000		/* interface on subnetted network */
#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();
