[apple/xnu.git] / bsd / net / if_pflog.c

/*
 * Copyright (c) 2007-2010 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

/*	$apfw: if_pflog.c,v 1.4 2008/08/27 00:01:32 jhw Exp $		*/
/*	$OpenBSD: if_pflog.c,v 1.22 2006/12/15 09:31:20 otto Exp $	*/
/*
 * The authors of this code are John Ioannidis (ji@tla.org),
 * Angelos D. Keromytis (kermit@csd.uch.gr) and 
 * Niels Provos (provos@physnet.uni-hamburg.de).
 *
 * This code was written by John Ioannidis for BSD/OS in Athens, Greece, 
 * in November 1995.
 *
 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
 * by Angelos D. Keromytis.
 *
 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
 * and Niels Provos.
 *
 * Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
 * and Niels Provos.
 * Copyright (c) 2001, Angelos D. Keromytis, Niels Provos.
 *
 * Permission to use, copy, and modify this software with or without fee
 * is hereby granted, provided that this entire notice is included in
 * all copies of any software which is or includes a copy or
 * modification of this software. 
 * You may use this code under the GNU public license if you so wish. Please
 * contribute changes back to the authors under this freer than GPL license
 * so that we may further the use of strong encryption without limitations to
 * all.
 *
 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
 * PURPOSE.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/proc_internal.h>
#include <sys/socket.h>
#include <sys/ioctl.h>

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

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

#if INET6
#if !INET
#include <netinet/in.h>
#endif
#include <netinet6/nd6.h>
#endif /* INET6 */

#include <net/pfvar.h>
#include <net/if_pflog.h>

#define	PFLOGNAME	"pflog"
#define PFLOGMTU	(32768 + MHLEN + MLEN)

#ifdef PFLOGDEBUG
#define DPRINTF(x)    do { if (pflogdebug) printf x ; } while (0)
#else
#define DPRINTF(x)
#endif

static int pflog_clone_create(struct if_clone *, u_int32_t, void *);
static int pflog_clone_destroy(struct ifnet *);
static errno_t pflogoutput(struct ifnet *, struct mbuf *);
static errno_t pflogioctl(struct ifnet *, unsigned long, void *);
static errno_t pflogdemux(struct ifnet *, struct mbuf *, char *,
    protocol_family_t *);
static errno_t pflogaddproto(struct ifnet *, protocol_family_t,
    const struct ifnet_demux_desc *, u_int32_t);
static errno_t pflogdelproto(struct ifnet *, protocol_family_t);
static void pflogfree(struct ifnet *);

static LIST_HEAD(, pflog_softc)	pflogif_list;
static struct if_clone pflog_cloner =
    IF_CLONE_INITIALIZER(PFLOGNAME, pflog_clone_create, pflog_clone_destroy,
        0, (PFLOGIFS_MAX - 1));

struct ifnet *pflogifs[PFLOGIFS_MAX];	/* for fast access */

void
pfloginit(void)
{
	int i;

	if (pf_perim_lock == NULL || pf_lock == NULL) {
		panic("%s: called before PF is initialized", __func__);
		/* NOTREACHED */
	}
	LIST_INIT(&pflogif_list);
	for (i = 0; i < PFLOGIFS_MAX; i++)
		pflogifs[i] = NULL;

	(void) if_clone_attach(&pflog_cloner);
}

static int
pflog_clone_create(struct if_clone *ifc, u_int32_t unit, __unused void *params)
{
	struct pflog_softc *pflogif;
	struct ifnet_init_params pf_init;
	int error = 0;

	if (unit >= PFLOGIFS_MAX) {
		/* Either the interface cloner or our initializer is broken */
		panic("%s: unit (%d) exceeds max (%d)", __func__, unit,
		    PFLOGIFS_MAX);
		/* NOTREACHED */
	}

	if ((pflogif = _MALLOC(sizeof (*pflogif),
	    M_DEVBUF, M_WAITOK|M_ZERO)) == NULL) {
		error = ENOMEM;
		goto done;
	}

	bzero(&pf_init, sizeof (pf_init));
	pf_init.name = ifc->ifc_name;
	pf_init.unit = unit;
	pf_init.type = IFT_PFLOG;
	pf_init.family = IFNET_FAMILY_LOOPBACK;
	pf_init.output = pflogoutput;
	pf_init.demux = pflogdemux;
	pf_init.add_proto = pflogaddproto;
	pf_init.del_proto = pflogdelproto;
	pf_init.softc = pflogif;
	pf_init.ioctl = pflogioctl;
	pf_init.detach = pflogfree;

	bzero(pflogif, sizeof (*pflogif));
	pflogif->sc_unit = unit;

	error = ifnet_allocate(&pf_init, &pflogif->sc_if);
	if (error != 0) {
		printf("%s: ifnet_allocate failed - %d\n", __func__, error);
		_FREE(pflogif, M_DEVBUF);
		goto done;
	}

	ifnet_set_mtu(pflogif->sc_if, PFLOGMTU);
	ifnet_set_flags(pflogif->sc_if, IFF_UP, IFF_UP);

	error = ifnet_attach(pflogif->sc_if, NULL);
	if (error != 0) {
		printf("%s: ifnet_attach failed - %d\n", __func__, error);
		ifnet_release(pflogif->sc_if);
		_FREE(pflogif, M_DEVBUF);
		goto done;
	}

#if NBPFILTER > 0
	bpfattach(pflogif->sc_if, DLT_PFLOG, PFLOG_HDRLEN);
#endif

	lck_rw_lock_shared(pf_perim_lock);
	lck_mtx_lock(pf_lock);
	LIST_INSERT_HEAD(&pflogif_list, pflogif, sc_list);
	pflogifs[unit] = pflogif->sc_if;
	lck_mtx_unlock(pf_lock);
	lck_rw_done(pf_perim_lock);

done:
	return (error);
}

static int
pflog_clone_destroy(struct ifnet *ifp)
{
	struct pflog_softc *pflogif = ifp->if_softc;

	lck_rw_lock_shared(pf_perim_lock);
	lck_mtx_lock(pf_lock);
	pflogifs[pflogif->sc_unit] = NULL;
	LIST_REMOVE(pflogif, sc_list);
	lck_mtx_unlock(pf_lock);
	lck_rw_done(pf_perim_lock);

	/* bpfdetach() is taken care of as part of interface detach */
	(void) ifnet_detach(ifp);

	return 0;
}

static errno_t
pflogoutput(struct ifnet *ifp, struct mbuf *m)
{
	printf("%s: freeing data for %s%d\n", __func__, ifp->if_name,
	    ifp->if_unit);
	m_freem(m);
	return (ENOTSUP);
}

static errno_t
pflogioctl(struct ifnet *ifp, unsigned long cmd, void *data)
{
#pragma unused(data)
	switch (cmd) {
	case SIOCSIFADDR:
	case SIOCAIFADDR:
	case SIOCSIFDSTADDR:
	case SIOCSIFFLAGS:
		if (ifnet_flags(ifp) & IFF_UP)
			ifnet_set_flags(ifp, IFF_RUNNING, IFF_RUNNING);
		else
			ifnet_set_flags(ifp, 0, IFF_RUNNING);
		break;
	default:
		return (ENOTTY);
	}

	return (0);
}

static errno_t
pflogdemux(struct ifnet *ifp, struct mbuf *m, char *h, protocol_family_t *ppf)
{
#pragma unused(h, ppf)
	printf("%s: freeing data for %s%d\n", __func__, ifp->if_name,
	    ifp->if_unit);
	m_freem(m);
	return (EJUSTRETURN);
}

static errno_t
pflogaddproto(struct ifnet *ifp, protocol_family_t pf,
    const struct ifnet_demux_desc *d, u_int32_t cnt)
{
#pragma unused(ifp, pf, d, cnt)
	return (0);
}

static errno_t
pflogdelproto(struct ifnet *ifp, protocol_family_t pf)
{
#pragma unused(ifp, pf)
	return (0);
}

static void
pflogfree(struct ifnet *ifp)
{
	_FREE(ifp->if_softc, M_DEVBUF);
	ifp->if_softc = NULL;
	(void) ifnet_release(ifp);
}

int
pflog_packet(struct pfi_kif *kif, struct mbuf *m, sa_family_t af, u_int8_t dir,
    u_int8_t reason, struct pf_rule *rm, struct pf_rule *am,
    struct pf_ruleset *ruleset, struct pf_pdesc *pd)
{
#if NBPFILTER > 0
	struct ifnet *ifn;
	struct pfloghdr hdr;

	lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);

	if (kif == NULL || m == NULL || rm == NULL || pd == NULL)
		return (-1);

	if (rm->logif >= PFLOGIFS_MAX ||
	    (ifn = pflogifs[rm->logif]) == NULL || !ifn->if_bpf) {
		return (0);
	}

	bzero(&hdr, sizeof (hdr));
	hdr.length = PFLOG_REAL_HDRLEN;
	hdr.af = af;
	hdr.action = rm->action;
	hdr.reason = reason;
	memcpy(hdr.ifname, kif->pfik_name, sizeof (hdr.ifname));

	if (am == NULL) {
		hdr.rulenr = htonl(rm->nr);
		hdr.subrulenr = -1;
	} else {
		hdr.rulenr = htonl(am->nr);
		hdr.subrulenr = htonl(rm->nr);
		if (ruleset != NULL && ruleset->anchor != NULL)
			strlcpy(hdr.ruleset, ruleset->anchor->name,
			    sizeof (hdr.ruleset));
	}
	if (rm->log & PF_LOG_SOCKET_LOOKUP && !pd->lookup.done)
		pd->lookup.done = pf_socket_lookup(dir, pd);
	if (pd->lookup.done > 0) {
		hdr.uid = pd->lookup.uid;
		hdr.pid = pd->lookup.pid;
	} else {
		hdr.uid = UID_MAX;
		hdr.pid = NO_PID;
	}
	hdr.rule_uid = rm->cuid;
	hdr.rule_pid = rm->cpid;
	hdr.dir = dir;

#if INET
	if (af == AF_INET && dir == PF_OUT) {
		struct ip *ip;

		ip = mtod(m, struct ip *);
		ip->ip_sum = 0;
		ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
	}
#endif /* INET */

	ifn->if_opackets++;
	ifn->if_obytes += m->m_pkthdr.len;

	switch (dir) {
	case PF_IN:
		bpf_tap_in(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
		break;

	case PF_OUT:
		bpf_tap_out(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
		break;

	default:
		break;
	}
#endif /* NBPFILTER > 0 */
	return (0);
}
Commit	Line	Data
b0d623f7	1	/*
d1ecb069	2	* Copyright (c) 2007-2010 Apple Inc. All rights reserved.
b0d623f7 A	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28
	29	/* $apfw: if_pflog.c,v 1.4 2008/08/27 00:01:32 jhw Exp $ */
	30	/* $OpenBSD: if_pflog.c,v 1.22 2006/12/15 09:31:20 otto Exp $ */
	31	/*
	32	* The authors of this code are John Ioannidis (ji@tla.org),
	33	* Angelos D. Keromytis (kermit@csd.uch.gr) and
	34	* Niels Provos (provos@physnet.uni-hamburg.de).
	35	*
	36	* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
	37	* in November 1995.
	38	*
	39	* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
	40	* by Angelos D. Keromytis.
	41	*
	42	* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
	43	* and Niels Provos.
	44	*
	45	* Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
	46	* and Niels Provos.
	47	* Copyright (c) 2001, Angelos D. Keromytis, Niels Provos.
	48	*
	49	* Permission to use, copy, and modify this software with or without fee
	50	* is hereby granted, provided that this entire notice is included in
	51	* all copies of any software which is or includes a copy or
	52	* modification of this software.
	53	* You may use this code under the GNU public license if you so wish. Please
	54	* contribute changes back to the authors under this freer than GPL license
	55	* so that we may further the use of strong encryption without limitations to
	56	* all.
	57	*
	58	* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
	59	* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
	60	* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
	61	* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
	62	* PURPOSE.
	63	*/
	64
	65	#include <sys/param.h>
	66	#include <sys/systm.h>
67	#include <sys/mbuf.h>
68	#include <sys/proc_internal.h>
69	#include <sys/socket.h>
70	#include <sys/ioctl.h>
71
72	#include <net/if.h>
d1ecb069	73	#include <net/if_var.h>
b0d623f7 A	74	#include <net/if_types.h>
	75	#include <net/route.h>
	76	#include <net/bpf.h>
	77
	78	#if INET
	79	#include <netinet/in.h>
	80	#include <netinet/in_var.h>
	81	#include <netinet/in_systm.h>
	82	#include <netinet/ip.h>
	83	#endif
	84
	85	#if INET6
	86	#if !INET
	87	#include <netinet/in.h>
	88	#endif
	89	#include <netinet6/nd6.h>
	90	#endif /* INET6 */
	91
	92	#include <net/pfvar.h>
	93	#include <net/if_pflog.h>
	94
	95	#define PFLOGNAME "pflog"
	96	#define PFLOGMTU (32768 + MHLEN + MLEN)
	97
	98	#ifdef PFLOGDEBUG
	99	#define DPRINTF(x) do { if (pflogdebug) printf x ; } while (0)
	100	#else
	101	#define DPRINTF(x)
	102	#endif
	103
d1ecb069 A	104	static int pflog_clone_create(struct if_clone , u_int32_t, void );
d1ecb069 A	105	static int pflog_clone_destroy(struct ifnet *);
b0d623f7 A	106	static errno_t pflogoutput(struct ifnet , struct mbuf );
	107	static errno_t pflogioctl(struct ifnet , unsigned long, void );
	108	static errno_t pflogdemux(struct ifnet , struct mbuf , char *,
	109	protocol_family_t *);
	110	static errno_t pflogaddproto(struct ifnet *, protocol_family_t,
	111	const struct ifnet_demux_desc *, u_int32_t);
	112	static errno_t pflogdelproto(struct ifnet *, protocol_family_t);
d1ecb069	113	static void pflogfree(struct ifnet *);
b0d623f7 A	114
b0d623f7 A	115	static LIST_HEAD(, pflog_softc) pflogif_list;
d1ecb069 A	116	static struct if_clone pflog_cloner =
	117	IF_CLONE_INITIALIZER(PFLOGNAME, pflog_clone_create, pflog_clone_destroy,
	118	0, (PFLOGIFS_MAX - 1));
b0d623f7 A	119
b0d623f7 A	120	struct ifnet pflogifs[PFLOGIFS_MAX]; / for fast access */
b0d623f7 A	121
	122	void
	123	pfloginit(void)
	124	{
	125	int i;
	126
d1ecb069 A	127	if (pf_perim_lock == NULL \|\| pf_lock == NULL) {
d1ecb069 A	128	panic("%s: called before PF is initialized", __func__);
b0d623f7 A	129	/* NOTREACHED */
	130	}
	131	LIST_INIT(&pflogif_list);
	132	for (i = 0; i < PFLOGIFS_MAX; i++)
	133	pflogifs[i] = NULL;
	134
d1ecb069	135	(void) if_clone_attach(&pflog_cloner);
b0d623f7 A	136	}
	137
	138	static int
d1ecb069	139	pflog_clone_create(struct if_clone ifc, u_int32_t unit, __unused void params)
b0d623f7 A	140	{
	141	struct pflog_softc *pflogif;
	142	struct ifnet_init_params pf_init;
	143	int error = 0;
	144
d1ecb069 A	145	if (unit >= PFLOGIFS_MAX) {
	146	/* Either the interface cloner or our initializer is broken */
	147	panic("%s: unit (%d) exceeds max (%d)", __func__, unit,
	148	PFLOGIFS_MAX);
	149	/* NOTREACHED */
b0d623f7 A	150	}
	151
	152	if ((pflogif = _MALLOC(sizeof (*pflogif),
	153	M_DEVBUF, M_WAITOK\|M_ZERO)) == NULL) {
	154	error = ENOMEM;
	155	goto done;
	156	}
	157
	158	bzero(&pf_init, sizeof (pf_init));
d1ecb069 A	159	pf_init.name = ifc->ifc_name;
d1ecb069 A	160	pf_init.unit = unit;
b0d623f7 A	161	pf_init.type = IFT_PFLOG;
	162	pf_init.family = IFNET_FAMILY_LOOPBACK;
	163	pf_init.output = pflogoutput;
	164	pf_init.demux = pflogdemux;
	165	pf_init.add_proto = pflogaddproto;
	166	pf_init.del_proto = pflogdelproto;
	167	pf_init.softc = pflogif;
	168	pf_init.ioctl = pflogioctl;
d1ecb069	169	pf_init.detach = pflogfree;
b0d623f7 A	170
b0d623f7 A	171	bzero(pflogif, sizeof (*pflogif));
d1ecb069	172	pflogif->sc_unit = unit;
b0d623f7 A	173
	174	error = ifnet_allocate(&pf_init, &pflogif->sc_if);
	175	if (error != 0) {
	176	printf("%s: ifnet_allocate failed - %d\n", __func__, error);
	177	_FREE(pflogif, M_DEVBUF);
	178	goto done;
	179	}
	180
	181	ifnet_set_mtu(pflogif->sc_if, PFLOGMTU);
	182	ifnet_set_flags(pflogif->sc_if, IFF_UP, IFF_UP);
	183
	184	error = ifnet_attach(pflogif->sc_if, NULL);
	185	if (error != 0) {
	186	printf("%s: ifnet_attach failed - %d\n", __func__, error);
	187	ifnet_release(pflogif->sc_if);
	188	_FREE(pflogif, M_DEVBUF);
	189	goto done;
	190	}
	191
	192	#if NBPFILTER > 0
	193	bpfattach(pflogif->sc_if, DLT_PFLOG, PFLOG_HDRLEN);
	194	#endif
	195
d1ecb069 A	196	lck_rw_lock_shared(pf_perim_lock);
d1ecb069 A	197	lck_mtx_lock(pf_lock);
b0d623f7	198	LIST_INSERT_HEAD(&pflogif_list, pflogif, sc_list);
d1ecb069 A	199	pflogifs[unit] = pflogif->sc_if;
	200	lck_mtx_unlock(pf_lock);
	201	lck_rw_done(pf_perim_lock);
b0d623f7	202
d1ecb069	203	done:
b0d623f7 A	204	return (error);
	205	}
	206
d1ecb069 A	207	static int
d1ecb069 A	208	pflog_clone_destroy(struct ifnet *ifp)
b0d623f7	209	{
d1ecb069	210	struct pflog_softc *pflogif = ifp->if_softc;
b0d623f7	211
d1ecb069 A	212	lck_rw_lock_shared(pf_perim_lock);
d1ecb069 A	213	lck_mtx_lock(pf_lock);
b0d623f7 A	214	pflogifs[pflogif->sc_unit] = NULL;
b0d623f7 A	215	LIST_REMOVE(pflogif, sc_list);
d1ecb069 A	216	lck_mtx_unlock(pf_lock);
d1ecb069 A	217	lck_rw_done(pf_perim_lock);
b0d623f7	218
d1ecb069 A	219	/* bpfdetach() is taken care of as part of interface detach */
	220	(void) ifnet_detach(ifp);
	221
	222	return 0;
b0d623f7	223	}
b0d623f7 A	224
	225	static errno_t
	226	pflogoutput(struct ifnet ifp, struct mbuf m)
	227	{
	228	printf("%s: freeing data for %s%d\n", __func__, ifp->if_name,
	229	ifp->if_unit);
	230	m_freem(m);
	231	return (ENOTSUP);
	232	}
	233
	234	static errno_t
	235	pflogioctl(struct ifnet ifp, unsigned long cmd, void data)
	236	{
	237	#pragma unused(data)
	238	switch (cmd) {
	239	case SIOCSIFADDR:
	240	case SIOCAIFADDR:
	241	case SIOCSIFDSTADDR:
	242	case SIOCSIFFLAGS:
	243	if (ifnet_flags(ifp) & IFF_UP)
	244	ifnet_set_flags(ifp, IFF_RUNNING, IFF_RUNNING);
	245	else
	246	ifnet_set_flags(ifp, 0, IFF_RUNNING);
	247	break;
	248	default:
	249	return (ENOTTY);
	250	}
	251
	252	return (0);
	253	}
	254
	255	static errno_t
	256	pflogdemux(struct ifnet ifp, struct mbuf m, char h, protocol_family_t ppf)
	257	{
	258	#pragma unused(h, ppf)
	259	printf("%s: freeing data for %s%d\n", __func__, ifp->if_name,
	260	ifp->if_unit);
	261	m_freem(m);
	262	return (EJUSTRETURN);
	263	}
	264
	265	static errno_t
	266	pflogaddproto(struct ifnet *ifp, protocol_family_t pf,
	267	const struct ifnet_demux_desc *d, u_int32_t cnt)
	268	{
	269	#pragma unused(ifp, pf, d, cnt)
	270	return (0);
	271	}
	272
	273	static errno_t
	274	pflogdelproto(struct ifnet *ifp, protocol_family_t pf)
	275	{
	276	#pragma unused(ifp, pf)
	277	return (0);
	278	}
	279
d1ecb069 A	280	static void
	281	pflogfree(struct ifnet *ifp)
	282	{
	283	_FREE(ifp->if_softc, M_DEVBUF);
	284	ifp->if_softc = NULL;
	285	(void) ifnet_release(ifp);
	286	}
	287
b0d623f7 A	288	int
	289	pflog_packet(struct pfi_kif kif, struct mbuf m, sa_family_t af, u_int8_t dir,
	290	u_int8_t reason, struct pf_rule rm, struct pf_rule am,
	291	struct pf_ruleset ruleset, struct pf_pdesc pd)
	292	{
	293	#if NBPFILTER > 0
	294	struct ifnet *ifn;
	295	struct pfloghdr hdr;
	296
d1ecb069 A	297	lck_mtx_assert(pf_lock, LCK_MTX_ASSERT_OWNED);
d1ecb069 A	298
b0d623f7 A	299	if (kif == NULL \|\| m == NULL \|\| rm == NULL \|\| pd == NULL)
	300	return (-1);
	301
	302	if (rm->logif >= PFLOGIFS_MAX \|\|
	303	(ifn = pflogifs[rm->logif]) == NULL \|\| !ifn->if_bpf) {
	304	return (0);
	305	}
	306
	307	bzero(&hdr, sizeof (hdr));
	308	hdr.length = PFLOG_REAL_HDRLEN;
	309	hdr.af = af;
	310	hdr.action = rm->action;
	311	hdr.reason = reason;
	312	memcpy(hdr.ifname, kif->pfik_name, sizeof (hdr.ifname));
	313
	314	if (am == NULL) {
	315	hdr.rulenr = htonl(rm->nr);
	316	hdr.subrulenr = -1;
	317	} else {
	318	hdr.rulenr = htonl(am->nr);
	319	hdr.subrulenr = htonl(rm->nr);
	320	if (ruleset != NULL && ruleset->anchor != NULL)
	321	strlcpy(hdr.ruleset, ruleset->anchor->name,
	322	sizeof (hdr.ruleset));
	323	}
	324	if (rm->log & PF_LOG_SOCKET_LOOKUP && !pd->lookup.done)
	325	pd->lookup.done = pf_socket_lookup(dir, pd);
	326	if (pd->lookup.done > 0) {
	327	hdr.uid = pd->lookup.uid;
	328	hdr.pid = pd->lookup.pid;
	329	} else {
	330	hdr.uid = UID_MAX;
	331	hdr.pid = NO_PID;
	332	}
	333	hdr.rule_uid = rm->cuid;
	334	hdr.rule_pid = rm->cpid;
	335	hdr.dir = dir;
	336
	337	#if INET
	338	if (af == AF_INET && dir == PF_OUT) {
	339	struct ip *ip;
	340
	341	ip = mtod(m, struct ip *);
	342	ip->ip_sum = 0;
	343	ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
	344	}
	345	#endif /* INET */
	346
	347	ifn->if_opackets++;
	348	ifn->if_obytes += m->m_pkthdr.len;
	349
	350	switch (dir) {
	351	case PF_IN:
	352	bpf_tap_in(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
	353	break;
	354
	355	case PF_OUT:
	356	bpf_tap_out(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
	357	break;
	358
	359	default:
	360	break;
	361	}
	362	#endif /* NBPFILTER > 0 */
363	return (0);
364	}