1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Copyright (c) 1995 John Hay.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *	@(#)interface.h	8.1 (Berkeley) 6/5/93
36 *
37 * $FreeBSD$
38 */
39
40/*
41 * Routing table management daemon.
42 */
43
44/*
45 * An ``interface'' is similar to an ifnet structure,
46 * except it doesn't contain q'ing info, and it also
47 * handles ``logical'' interfaces (remote gateways
48 * that we want to keep polling even if they go down).
49 * The list of interfaces which we maintain is used
50 * in supplying the gratuitous routing table updates.
51 * We list only one address for  each interface, the AF_IPX one.
52 */
53struct interface {
54	struct	interface *int_next;
55	struct	sockaddr int_addr;		/* address on this host */
56	union {
57		struct	sockaddr intu_broadaddr;
58		struct	sockaddr intu_dstaddr;
59	} int_intu;
60#define	int_broadaddr	int_intu.intu_broadaddr	/* broadcast address */
61#define	int_dstaddr	int_intu.intu_dstaddr	/* other end of p-to-p link */
62	int	int_metric;			/* init's routing entry */
63	int	int_flags;			/* see below */
64	struct	ifdebug int_input, int_output;	/* packet tracing stuff */
65	int	int_ipackets;			/* input packets received */
66	int	int_opackets;			/* output packets sent */
67	char	*int_name;			/* from kernel if structure */
68	u_short	int_transitions;		/* times gone up-down */
69
70	/* XXX IPX Specific entry */
71	struct	sameq {
72		struct sameq *n;		/* q of other pt-to-pt links */
73		struct sameq *p;		/* with same net # */
74	}	int_sq;
75};
76
77/*
78 * 0x1 to 0x10 are reused from the kernel's ifnet definitions,
79 * the others agree with the RTS_ flags defined elsewhere.
80 */
81#define	IFF_UP		0x1		/* interface is up */
82#define	IFF_BROADCAST	0x2		/* broadcast address valid */
83#define	IFF_DEBUG	0x4		/* turn on debugging */
84#define	IFF_ROUTE	0x8		/* routing entry installed */
85#define	IFF_POINTOPOINT	0x10		/* interface is point-to-point link */
86
87#define	IFF_PASSIVE	0x200000	/* can't tell if up/down */
88#define	IFF_INTERFACE	0x400000	/* hardware interface */
89#define	IFF_REMOTE	0x800000	/* interface isn't on this machine */
90
91struct	interface *if_ifwithaddr(struct sockaddr *);
92struct	interface *if_ifwithdstaddr(struct sockaddr *);
93struct	interface *if_ifwithnet(struct sockaddr *);
94struct	interface *if_iflookup(struct sockaddr *);
95
96