<commit_before>/*	$KAME: if_faith.c,v 1.23 2001/12/17 13:55:29 sumikawa Exp $	*/

/*
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */
/*
 * derived from
 *	@(#)if_loop.c	8.1 (Berkeley) 6/10/93
 * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
 */

/*
 * Loopback interface driver for protocol testing and timing.
 */
#include "opt_inet.h"
#include "opt_inet6.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/sockio.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/malloc.h>

#include <net/if.h>
#include <net/if_clone.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/bpf.h>

#ifdef	INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif

#ifdef INET6
#ifndef INET
#include <netinet/in.h>
#endif
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif

#include <net/net_osdep.h>

#define FAITHNAME	"faith"

struct faith_softc {
	struct ifnet sc_if;	/* must be first */
	LIST_ENTRY(faith_softc) sc_list;
};

static int faithioctl(struct ifnet *, u_long, caddr_t);
int faithoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
	struct rtentry *);
static void faithrtrequest(int, struct rtentry *, struct rt_addrinfo *);
#ifdef INET6
static int faithprefix(struct in6_addr *);
#endif

static int faithmodevent(module_t, int, void *);

static struct mtx faith_mtx;
static MALLOC_DEFINE(M_FAITH, FAITHNAME, "Firewall Assisted Tunnel Interface");
static LIST_HEAD(, faith_softc) faith_softc_list;

static int	faith_clone_create(struct if_clone *, int);
static void	faith_clone_destroy(struct ifnet *);
static void	faith_destroy(struct faith_softc *);

IFC_SIMPLE_DECLARE(faith, 0);

#define	FAITHMTU	1500

static int
faithmodevent(mod, type, data)
	module_t mod;
	int type;
	void *data;
{
	struct faith_softc *sc;

	switch (type) {
	case MOD_LOAD:
		mtx_init(&faith_mtx, "faith_mtx", NULL, MTX_DEF);
		LIST_INIT(&faith_softc_list);
		if_clone_attach(&faith_cloner);

#ifdef INET6
		faithprefix_p = faithprefix;
#endif

		break;
	case MOD_UNLOAD:
#ifdef INET6
		faithprefix_p = NULL;
#endif

		if_clone_detach(&faith_cloner);

		mtx_lock(&faith_mtx);
		while ((sc = LIST_FIRST(&faith_softc_list)) != NULL) {
			LIST_REMOVE(sc, sc_list);
			mtx_unlock(&faith_mtx);
			faith_destroy(sc);
			mtx_lock(&faith_mtx);
		}
		mtx_unlock(&faith_mtx);
		mtx_destroy(&faith_mtx);
		break;
	}
	return 0;
}

static moduledata_t faith_mod = {
	"if_faith",
	faithmodevent,
	0
};

DECLARE_MODULE(if_faith, faith_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_VERSION(if_faith, 1);

static int
faith_clone_create(ifc, unit)
	struct if_clone *ifc;
	int unit;
{
	struct faith_softc *sc;

	sc = malloc(sizeof(struct faith_softc), M_FAITH, M_WAITOK);
	bzero(sc, sizeof(struct faith_softc));

	sc->sc_if.if_softc = sc;
	if_initname(&sc->sc_if, ifc->ifc_name, unit);

	sc->sc_if.if_mtu = FAITHMTU;
	/* Change to BROADCAST experimentaly to announce its prefix. */<commit_msg>Use M_ZERO instead of bzero().<commit_after>/*	$KAME: if_faith.c,v 1.23 2001/12/17 13:55:29 sumikawa Exp $	*/

/*
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */
/*
 * derived from
 *	@(#)if_loop.c	8.1 (Berkeley) 6/10/93
 * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
 */

/*
 * Loopback interface driver for protocol testing and timing.
 */
#include "opt_inet.h"
#include "opt_inet6.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/sockio.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/malloc.h>

#include <net/if.h>
#include <net/if_clone.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/bpf.h>

#ifdef	INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif

#ifdef INET6
#ifndef INET
#include <netinet/in.h>
#endif
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif

#include <net/net_osdep.h>

#define FAITHNAME	"faith"

struct faith_softc {
	struct ifnet sc_if;	/* must be first */
	LIST_ENTRY(faith_softc) sc_list;
};

static int faithioctl(struct ifnet *, u_long, caddr_t);
int faithoutput(struct ifnet *, struct mbuf *, struct sockaddr *,
	struct rtentry *);
static void faithrtrequest(int, struct rtentry *, struct rt_addrinfo *);
#ifdef INET6
static int faithprefix(struct in6_addr *);
#endif

static int faithmodevent(module_t, int, void *);

static struct mtx faith_mtx;
static MALLOC_DEFINE(M_FAITH, FAITHNAME, "Firewall Assisted Tunnel Interface");
static LIST_HEAD(, faith_softc) faith_softc_list;

static int	faith_clone_create(struct if_clone *, int);
static void	faith_clone_destroy(struct ifnet *);
static void	faith_destroy(struct faith_softc *);

IFC_SIMPLE_DECLARE(faith, 0);

#define	FAITHMTU	1500

static int
faithmodevent(mod, type, data)
	module_t mod;
	int type;
	void *data;
{
	struct faith_softc *sc;

	switch (type) {
	case MOD_LOAD:
		mtx_init(&faith_mtx, "faith_mtx", NULL, MTX_DEF);
		LIST_INIT(&faith_softc_list);
		if_clone_attach(&faith_cloner);

#ifdef INET6
		faithprefix_p = faithprefix;
#endif

		break;
	case MOD_UNLOAD:
#ifdef INET6
		faithprefix_p = NULL;
#endif

		if_clone_detach(&faith_cloner);

		mtx_lock(&faith_mtx);
		while ((sc = LIST_FIRST(&faith_softc_list)) != NULL) {
			LIST_REMOVE(sc, sc_list);
			mtx_unlock(&faith_mtx);
			faith_destroy(sc);
			mtx_lock(&faith_mtx);
		}
		mtx_unlock(&faith_mtx);
		mtx_destroy(&faith_mtx);
		break;
	}
	return 0;
}

static moduledata_t faith_mod = {
	"if_faith",
	faithmodevent,
	0
};

DECLARE_MODULE(if_faith, faith_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_VERSION(if_faith, 1);

static int
faith_clone_create(ifc, unit)
	struct if_clone *ifc;
	int unit;
{
	struct faith_softc *sc;

	sc = malloc(sizeof(struct faith_softc), M_FAITH, M_WAITOK | M_ZERO);

	sc->sc_if.if_softc = sc;
	if_initname(&sc->sc_if, ifc->ifc_name, unit);

	sc->sc_if.if_mtu = FAITHMTU;
	/* Change to BROADCAST experimentaly to announce its prefix. */
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