if_faith.c revision 56868 
1/*
2 * Copyright (c) 1982, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: head/sys/net/if_faith.c 56868 2000-01-29 18:10:39Z peter $
34 */
35/*
36 * derived from
37 *	@(#)if_loop.c	8.1 (Berkeley) 6/10/93
38 * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
39 */
40
41/*
42 * Loopback interface driver for protocol testing and timing.
43 */
44
45#include "faith.h"
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/kernel.h>
50#include <sys/mbuf.h>
51#include <sys/socket.h>
52#include <sys/sockio.h>
53
54#include <net/if.h>
55#include <net/if_types.h>
56#include <net/netisr.h>
57#include <net/route.h>
58#include <net/bpf.h>
59
60extern int loioctl __P((struct ifnet *, u_long, caddr_t));
61extern int looutput __P((struct ifnet *ifp,
62		struct mbuf *m, struct sockaddr *dst, struct rtentry *rt));
63
64void faithattach __P((void *));
65PSEUDO_SET(faithattach, if_faith);
66static struct ifnet faithif[NFAITH];
67
68#define	FAITHMTU	1500
69
70/* ARGSUSED */
71void
72faithattach(faith)
73	void *faith;
74{
75	register struct ifnet *ifp;
76	register int i;
77
78	for (i = 0; i < NFAITH; i++) {
79		ifp = &faithif[i];
80		bzero(ifp, sizeof(faithif[i]));
81		ifp->if_name = "faith";
82		ifp->if_unit = i;
83		ifp->if_mtu = FAITHMTU;
84		/* LOOPBACK commented out to announce IPv6 routes to faith */
85		ifp->if_flags = /* IFF_LOOPBACK | */ IFF_MULTICAST;
86		ifp->if_ioctl = loioctl;
87		ifp->if_output = looutput;
88		ifp->if_type = IFT_FAITH;
89		ifp->if_snd.ifq_maxlen = ifqmaxlen;
90		ifp->if_hdrlen = 0;
91		ifp->if_addrlen = 0;
92		if_attach(ifp);
93		bpfattach(ifp, DLT_NULL, sizeof(u_int));
94	}
95}
96