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

/*
 * Copyright (c) 2007-2018 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 <sys/mcache.h>

#include <kern/zalloc.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 !INET
#include <netinet/in.h>
#endif
#include <netinet6/nd6.h>

#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_remove(struct ifnet *);
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), PFLOGIF_ZONE_MAX_ELEM, sizeof(struct pflog_softc));

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

void
pfloginit(void)
{
	int i;

	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_eparams 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 = if_clone_softc_allocate(&pflog_cloner)) == NULL) {
		error = ENOMEM;
		goto done;
	}

	bzero(&pf_init, sizeof(pf_init));
	pf_init.ver = IFNET_INIT_CURRENT_VERSION;
	pf_init.len = sizeof(pf_init);
	pf_init.flags = IFNET_INIT_LEGACY;
	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;
	pflogif->sc_flags |= IFPFLF_DETACHING;

	error = ifnet_allocate_extended(&pf_init, &pflogif->sc_if);
	if (error != 0) {
		printf("%s: ifnet_allocate failed - %d\n", __func__, error);
		if_clone_softc_deallocate(&pflog_cloner, pflogif);
		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);
		if_clone_softc_deallocate(&pflog_cloner, pflogif);
		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;
	pflogif->sc_flags &= ~IFPFLF_DETACHING;
	lck_mtx_unlock(pf_lock);
	lck_rw_done(pf_perim_lock);

done:
	return error;
}

static int
pflog_remove(struct ifnet *ifp)
{
	int error = 0;
	struct pflog_softc *pflogif = NULL;

	lck_rw_lock_shared(pf_perim_lock);
	lck_mtx_lock(pf_lock);
	pflogif = ifp->if_softc;

	if (pflogif == NULL ||
	    (pflogif->sc_flags & IFPFLF_DETACHING) != 0) {
		error = EINVAL;
		goto done;
	}

	pflogif->sc_flags |= IFPFLF_DETACHING;
	LIST_REMOVE(pflogif, sc_list);
done:
	lck_mtx_unlock(pf_lock);
	lck_rw_done(pf_perim_lock);
	return error;
}

static int
pflog_clone_destroy(struct ifnet *ifp)
{
	int error = 0;

	if ((error = pflog_remove(ifp)) != 0) {
		goto done;
	}
	/* bpfdetach() is taken care of as part of interface detach */
	(void)ifnet_detach(ifp);
done:
	return error;
}

static errno_t
pflogoutput(struct ifnet *ifp, struct mbuf *m)
{
	printf("%s: freeing data for %s\n", __func__, if_name(ifp));
	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\n", __func__, if_name(ifp));
	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)
{
	if_clone_softc_deallocate(&pflog_cloner, ifp->if_softc);
	ifp->if_softc = NULL;
	(void) ifnet_release(ifp);
}

int
pflog_packet(struct pfi_kif *kif, pbuf_t *pbuf, 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;
	struct mbuf *m;

	LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);

	if (kif == NULL || !pbuf_is_valid(pbuf) || rm == NULL || pd == NULL) {
		return -1;
	}

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

	if ((m = pbuf_to_mbuf(pbuf, FALSE)) == NULL) {
		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 */

	atomic_add_64(&ifn->if_opackets, 1);
	atomic_add_64(&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	/*
d9a64523	2	* Copyright (c) 2007-2018 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),
0a7de745	33	* Angelos D. Keromytis (kermit@csd.uch.gr) and
b0d623f7 A	34	* Niels Provos (provos@physnet.uni-hamburg.de).
b0d623f7 A	35	*
0a7de745	36	* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
b0d623f7 A	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
0a7de745	52	* modification of this software.
b0d623f7 A	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>
6d2010ae	71	#include <sys/mcache.h>
b0d623f7	72
d9a64523 A	73	#include <kern/zalloc.h>
d9a64523 A	74
b0d623f7	75	#include <net/if.h>
d1ecb069	76	#include <net/if_var.h>
b0d623f7 A	77	#include <net/if_types.h>
	78	#include <net/route.h>
	79	#include <net/bpf.h>
	80
	81	#if INET
	82	#include <netinet/in.h>
	83	#include <netinet/in_var.h>
	84	#include <netinet/in_systm.h>
	85	#include <netinet/ip.h>
	86	#endif
	87
b0d623f7 A	88	#if !INET
	89	#include <netinet/in.h>
	90	#endif
	91	#include <netinet6/nd6.h>
b0d623f7 A	92
	93	#include <net/pfvar.h>
	94	#include <net/if_pflog.h>
	95
0a7de745 A	96	#define PFLOGNAME "pflog"
0a7de745 A	97	#define PFLOGMTU (32768 + MHLEN + MLEN)
b0d623f7 A	98
	99	#ifdef PFLOGDEBUG
	100	#define DPRINTF(x) do { if (pflogdebug) printf x ; } while (0)
	101	#else
	102	#define DPRINTF(x)
	103	#endif
	104
d9a64523	105	static int pflog_remove(struct ifnet *);
d1ecb069 A	106	static int pflog_clone_create(struct if_clone , u_int32_t, void );
d1ecb069 A	107	static int pflog_clone_destroy(struct ifnet *);
b0d623f7 A	108	static errno_t pflogoutput(struct ifnet , struct mbuf );
	109	static errno_t pflogioctl(struct ifnet , unsigned long, void );
	110	static errno_t pflogdemux(struct ifnet , struct mbuf , char *,
	111	protocol_family_t *);
	112	static errno_t pflogaddproto(struct ifnet *, protocol_family_t,
	113	const struct ifnet_demux_desc *, u_int32_t);
	114	static errno_t pflogdelproto(struct ifnet *, protocol_family_t);
d1ecb069	115	static void pflogfree(struct ifnet *);
b0d623f7	116
0a7de745	117	static LIST_HEAD(, pflog_softc) pflogif_list;
d1ecb069 A	118	static struct if_clone pflog_cloner =
d1ecb069 A	119	IF_CLONE_INITIALIZER(PFLOGNAME, pflog_clone_create, pflog_clone_destroy,
0a7de745	120	0, (PFLOGIFS_MAX - 1), PFLOGIF_ZONE_MAX_ELEM, sizeof(struct pflog_softc));
b0d623f7	121
0a7de745	122	struct ifnet pflogifs[PFLOGIFS_MAX]; / for fast access */
b0d623f7 A	123
	124	void
	125	pfloginit(void)
	126	{
	127	int i;
	128
b0d623f7	129	LIST_INIT(&pflogif_list);
0a7de745	130	for (i = 0; i < PFLOGIFS_MAX; i++) {
b0d623f7	131	pflogifs[i] = NULL;
0a7de745	132	}
b0d623f7	133
d1ecb069	134	(void) if_clone_attach(&pflog_cloner);
b0d623f7 A	135	}
	136
	137	static int
d1ecb069	138	pflog_clone_create(struct if_clone ifc, u_int32_t unit, __unused void params)
b0d623f7 A	139	{
b0d623f7 A	140	struct pflog_softc *pflogif;
5ba3f43e	141	struct ifnet_init_eparams pf_init;
b0d623f7 A	142	int error = 0;
b0d623f7 A	143
d1ecb069 A	144	if (unit >= PFLOGIFS_MAX) {
	145	/* Either the interface cloner or our initializer is broken */
	146	panic("%s: unit (%d) exceeds max (%d)", __func__, unit,
	147	PFLOGIFS_MAX);
	148	/* NOTREACHED */
b0d623f7 A	149	}
b0d623f7 A	150
d9a64523	151	if ((pflogif = if_clone_softc_allocate(&pflog_cloner)) == NULL) {
b0d623f7 A	152	error = ENOMEM;
	153	goto done;
	154	}
	155
0a7de745	156	bzero(&pf_init, sizeof(pf_init));
5ba3f43e	157	pf_init.ver = IFNET_INIT_CURRENT_VERSION;
0a7de745	158	pf_init.len = sizeof(pf_init);
5ba3f43e	159	pf_init.flags = IFNET_INIT_LEGACY;
d1ecb069 A	160	pf_init.name = ifc->ifc_name;
d1ecb069 A	161	pf_init.unit = unit;
b0d623f7 A	162	pf_init.type = IFT_PFLOG;
	163	pf_init.family = IFNET_FAMILY_LOOPBACK;
	164	pf_init.output = pflogoutput;
	165	pf_init.demux = pflogdemux;
	166	pf_init.add_proto = pflogaddproto;
	167	pf_init.del_proto = pflogdelproto;
	168	pf_init.softc = pflogif;
	169	pf_init.ioctl = pflogioctl;
d1ecb069	170	pf_init.detach = pflogfree;
b0d623f7	171
0a7de745	172	bzero(pflogif, sizeof(*pflogif));
d1ecb069	173	pflogif->sc_unit = unit;
d9a64523	174	pflogif->sc_flags \|= IFPFLF_DETACHING;
b0d623f7	175
5ba3f43e	176	error = ifnet_allocate_extended(&pf_init, &pflogif->sc_if);
b0d623f7 A	177	if (error != 0) {
b0d623f7 A	178	printf("%s: ifnet_allocate failed - %d\n", __func__, error);
d9a64523	179	if_clone_softc_deallocate(&pflog_cloner, pflogif);
b0d623f7 A	180	goto done;
	181	}
	182
	183	ifnet_set_mtu(pflogif->sc_if, PFLOGMTU);
	184	ifnet_set_flags(pflogif->sc_if, IFF_UP, IFF_UP);
	185
	186	error = ifnet_attach(pflogif->sc_if, NULL);
	187	if (error != 0) {
	188	printf("%s: ifnet_attach failed - %d\n", __func__, error);
	189	ifnet_release(pflogif->sc_if);
d9a64523	190	if_clone_softc_deallocate(&pflog_cloner, pflogif);
b0d623f7 A	191	goto done;
	192	}
	193
	194	#if NBPFILTER > 0
	195	bpfattach(pflogif->sc_if, DLT_PFLOG, PFLOG_HDRLEN);
	196	#endif
	197
d1ecb069 A	198	lck_rw_lock_shared(pf_perim_lock);
d1ecb069 A	199	lck_mtx_lock(pf_lock);
b0d623f7	200	LIST_INSERT_HEAD(&pflogif_list, pflogif, sc_list);
d1ecb069	201	pflogifs[unit] = pflogif->sc_if;
d9a64523	202	pflogif->sc_flags &= ~IFPFLF_DETACHING;
d1ecb069 A	203	lck_mtx_unlock(pf_lock);
d1ecb069 A	204	lck_rw_done(pf_perim_lock);
b0d623f7	205
d1ecb069	206	done:
0a7de745	207	return error;
b0d623f7 A	208	}
b0d623f7 A	209
d1ecb069	210	static int
d9a64523	211	pflog_remove(struct ifnet *ifp)
b0d623f7	212	{
d9a64523 A	213	int error = 0;
d9a64523 A	214	struct pflog_softc *pflogif = NULL;
b0d623f7	215
d1ecb069 A	216	lck_rw_lock_shared(pf_perim_lock);
d1ecb069 A	217	lck_mtx_lock(pf_lock);
d9a64523 A	218	pflogif = ifp->if_softc;
	219
	220	if (pflogif == NULL \|\|
	221	(pflogif->sc_flags & IFPFLF_DETACHING) != 0) {
	222	error = EINVAL;
	223	goto done;
	224	}
	225
	226	pflogif->sc_flags \|= IFPFLF_DETACHING;
b0d623f7	227	LIST_REMOVE(pflogif, sc_list);
d9a64523	228	done:
d1ecb069 A	229	lck_mtx_unlock(pf_lock);
d1ecb069 A	230	lck_rw_done(pf_perim_lock);
d9a64523 A	231	return error;
d9a64523 A	232	}
b0d623f7	233
d9a64523 A	234	static int
	235	pflog_clone_destroy(struct ifnet *ifp)
	236	{
	237	int error = 0;
d1ecb069	238
0a7de745	239	if ((error = pflog_remove(ifp)) != 0) {
d9a64523	240	goto done;
0a7de745	241	}
d9a64523 A	242	/* bpfdetach() is taken care of as part of interface detach */
	243	(void)ifnet_detach(ifp);
	244	done:
0a7de745	245	return error;
b0d623f7	246	}
b0d623f7 A	247
	248	static errno_t
	249	pflogoutput(struct ifnet ifp, struct mbuf m)
	250	{
39236c6e	251	printf("%s: freeing data for %s\n", __func__, if_name(ifp));
b0d623f7	252	m_freem(m);
0a7de745	253	return ENOTSUP;
b0d623f7 A	254	}
	255
	256	static errno_t
	257	pflogioctl(struct ifnet ifp, unsigned long cmd, void data)
	258	{
	259	#pragma unused(data)
	260	switch (cmd) {
	261	case SIOCSIFADDR:
	262	case SIOCAIFADDR:
	263	case SIOCSIFDSTADDR:
	264	case SIOCSIFFLAGS:
0a7de745	265	if (ifnet_flags(ifp) & IFF_UP) {
b0d623f7	266	ifnet_set_flags(ifp, IFF_RUNNING, IFF_RUNNING);
0a7de745	267	} else {
b0d623f7	268	ifnet_set_flags(ifp, 0, IFF_RUNNING);
0a7de745	269	}
b0d623f7 A	270	break;
b0d623f7 A	271	default:
0a7de745	272	return ENOTTY;
b0d623f7 A	273	}
b0d623f7 A	274
0a7de745	275	return 0;
b0d623f7 A	276	}
	277
	278	static errno_t
	279	pflogdemux(struct ifnet ifp, struct mbuf m, char h, protocol_family_t ppf)
	280	{
	281	#pragma unused(h, ppf)
39236c6e	282	printf("%s: freeing data for %s\n", __func__, if_name(ifp));
b0d623f7	283	m_freem(m);
0a7de745	284	return EJUSTRETURN;
b0d623f7 A	285	}
	286
	287	static errno_t
	288	pflogaddproto(struct ifnet *ifp, protocol_family_t pf,
	289	const struct ifnet_demux_desc *d, u_int32_t cnt)
	290	{
	291	#pragma unused(ifp, pf, d, cnt)
0a7de745	292	return 0;
b0d623f7 A	293	}
	294
	295	static errno_t
	296	pflogdelproto(struct ifnet *ifp, protocol_family_t pf)
	297	{
	298	#pragma unused(ifp, pf)
0a7de745	299	return 0;
b0d623f7 A	300	}
b0d623f7 A	301
d1ecb069 A	302	static void
	303	pflogfree(struct ifnet *ifp)
	304	{
d9a64523	305	if_clone_softc_deallocate(&pflog_cloner, ifp->if_softc);
d1ecb069 A	306	ifp->if_softc = NULL;
	307	(void) ifnet_release(ifp);
	308	}
	309
b0d623f7	310	int
5ba3f43e	311	pflog_packet(struct pfi_kif kif, pbuf_t pbuf, sa_family_t af, u_int8_t dir,
b0d623f7 A	312	u_int8_t reason, struct pf_rule rm, struct pf_rule am,
	313	struct pf_ruleset ruleset, struct pf_pdesc pd)
	314	{
	315	#if NBPFILTER > 0
	316	struct ifnet *ifn;
	317	struct pfloghdr hdr;
5ba3f43e	318	struct mbuf *m;
b0d623f7	319
5ba3f43e	320	LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
d1ecb069	321
0a7de745 A	322	if (kif == NULL \|\| !pbuf_is_valid(pbuf) \|\| rm == NULL \|\| pd == NULL) {
	323	return -1;
	324	}
b0d623f7 A	325
	326	if (rm->logif >= PFLOGIFS_MAX \|\|
	327	(ifn = pflogifs[rm->logif]) == NULL \|\| !ifn->if_bpf) {
0a7de745	328	return 0;
b0d623f7 A	329	}
b0d623f7 A	330
0a7de745 A	331	if ((m = pbuf_to_mbuf(pbuf, FALSE)) == NULL) {
	332	return 0;
	333	}
5ba3f43e	334
0a7de745	335	bzero(&hdr, sizeof(hdr));
b0d623f7 A	336	hdr.length = PFLOG_REAL_HDRLEN;
	337	hdr.af = af;
	338	hdr.action = rm->action;
	339	hdr.reason = reason;
0a7de745	340	memcpy(hdr.ifname, kif->pfik_name, sizeof(hdr.ifname));
b0d623f7 A	341
	342	if (am == NULL) {
	343	hdr.rulenr = htonl(rm->nr);
	344	hdr.subrulenr = -1;
	345	} else {
	346	hdr.rulenr = htonl(am->nr);
	347	hdr.subrulenr = htonl(rm->nr);
0a7de745	348	if (ruleset != NULL && ruleset->anchor != NULL) {
b0d623f7	349	strlcpy(hdr.ruleset, ruleset->anchor->name,
0a7de745 A	350	sizeof(hdr.ruleset));
0a7de745 A	351	}
b0d623f7	352	}
0a7de745	353	if (rm->log & PF_LOG_SOCKET_LOOKUP && !pd->lookup.done) {
b0d623f7	354	pd->lookup.done = pf_socket_lookup(dir, pd);
0a7de745	355	}
b0d623f7 A	356	if (pd->lookup.done > 0) {
	357	hdr.uid = pd->lookup.uid;
	358	hdr.pid = pd->lookup.pid;
	359	} else {
	360	hdr.uid = UID_MAX;
	361	hdr.pid = NO_PID;
	362	}
	363	hdr.rule_uid = rm->cuid;
	364	hdr.rule_pid = rm->cpid;
	365	hdr.dir = dir;
	366
	367	#if INET
	368	if (af == AF_INET && dir == PF_OUT) {
	369	struct ip *ip;
	370
	371	ip = mtod(m, struct ip *);
	372	ip->ip_sum = 0;
	373	ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
	374	}
	375	#endif /* INET */
	376
6d2010ae A	377	atomic_add_64(&ifn->if_opackets, 1);
6d2010ae A	378	atomic_add_64(&ifn->if_obytes, m->m_pkthdr.len);
b0d623f7 A	379
	380	switch (dir) {
	381	case PF_IN:
	382	bpf_tap_in(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
	383	break;
	384
	385	case PF_OUT:
	386	bpf_tap_out(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
	387	break;
	388
	389	default:
	390	break;
	391	}
	392	#endif /* NBPFILTER > 0 */
0a7de745	393	return 0;
b0d623f7	394	}