[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 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_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
	88	#if INET6
	89	#if !INET
	90	#include <netinet/in.h>
	91	#endif
	92	#include <netinet6/nd6.h>
	93	#endif /* INET6 */
	94
	95	#include <net/pfvar.h>
	96	#include <net/if_pflog.h>
	97
0a7de745 A	98	#define PFLOGNAME "pflog"
0a7de745 A	99	#define PFLOGMTU (32768 + MHLEN + MLEN)
b0d623f7 A	100
	101	#ifdef PFLOGDEBUG
	102	#define DPRINTF(x) do { if (pflogdebug) printf x ; } while (0)
	103	#else
	104	#define DPRINTF(x)
	105	#endif
	106
d9a64523	107	static int pflog_remove(struct ifnet *);
d1ecb069 A	108	static int pflog_clone_create(struct if_clone , u_int32_t, void );
d1ecb069 A	109	static int pflog_clone_destroy(struct ifnet *);
b0d623f7 A	110	static errno_t pflogoutput(struct ifnet , struct mbuf );
	111	static errno_t pflogioctl(struct ifnet , unsigned long, void );
	112	static errno_t pflogdemux(struct ifnet , struct mbuf , char *,
	113	protocol_family_t *);
	114	static errno_t pflogaddproto(struct ifnet *, protocol_family_t,
	115	const struct ifnet_demux_desc *, u_int32_t);
	116	static errno_t pflogdelproto(struct ifnet *, protocol_family_t);
d1ecb069	117	static void pflogfree(struct ifnet *);
b0d623f7	118
0a7de745	119	static LIST_HEAD(, pflog_softc) pflogif_list;
d1ecb069 A	120	static struct if_clone pflog_cloner =
d1ecb069 A	121	IF_CLONE_INITIALIZER(PFLOGNAME, pflog_clone_create, pflog_clone_destroy,
0a7de745	122	0, (PFLOGIFS_MAX - 1), PFLOGIF_ZONE_MAX_ELEM, sizeof(struct pflog_softc));
b0d623f7	123
0a7de745	124	struct ifnet pflogifs[PFLOGIFS_MAX]; / for fast access */
b0d623f7 A	125
	126	void
	127	pfloginit(void)
	128	{
	129	int i;
	130
b0d623f7	131	LIST_INIT(&pflogif_list);
0a7de745	132	for (i = 0; i < PFLOGIFS_MAX; i++) {
b0d623f7	133	pflogifs[i] = NULL;
0a7de745	134	}
b0d623f7	135
d1ecb069	136	(void) if_clone_attach(&pflog_cloner);
b0d623f7 A	137	}
	138
	139	static int
d1ecb069	140	pflog_clone_create(struct if_clone ifc, u_int32_t unit, __unused void params)
b0d623f7 A	141	{
b0d623f7 A	142	struct pflog_softc *pflogif;
5ba3f43e	143	struct ifnet_init_eparams pf_init;
b0d623f7 A	144	int error = 0;
b0d623f7 A	145
d1ecb069 A	146	if (unit >= PFLOGIFS_MAX) {
	147	/* Either the interface cloner or our initializer is broken */
	148	panic("%s: unit (%d) exceeds max (%d)", __func__, unit,
	149	PFLOGIFS_MAX);
	150	/* NOTREACHED */
b0d623f7 A	151	}
b0d623f7 A	152
d9a64523	153	if ((pflogif = if_clone_softc_allocate(&pflog_cloner)) == NULL) {
b0d623f7 A	154	error = ENOMEM;
	155	goto done;
	156	}
	157
0a7de745	158	bzero(&pf_init, sizeof(pf_init));
5ba3f43e	159	pf_init.ver = IFNET_INIT_CURRENT_VERSION;
0a7de745	160	pf_init.len = sizeof(pf_init);
5ba3f43e	161	pf_init.flags = IFNET_INIT_LEGACY;
d1ecb069 A	162	pf_init.name = ifc->ifc_name;
d1ecb069 A	163	pf_init.unit = unit;
b0d623f7 A	164	pf_init.type = IFT_PFLOG;
	165	pf_init.family = IFNET_FAMILY_LOOPBACK;
	166	pf_init.output = pflogoutput;
	167	pf_init.demux = pflogdemux;
	168	pf_init.add_proto = pflogaddproto;
	169	pf_init.del_proto = pflogdelproto;
	170	pf_init.softc = pflogif;
	171	pf_init.ioctl = pflogioctl;
d1ecb069	172	pf_init.detach = pflogfree;
b0d623f7	173
0a7de745	174	bzero(pflogif, sizeof(*pflogif));
d1ecb069	175	pflogif->sc_unit = unit;
d9a64523	176	pflogif->sc_flags \|= IFPFLF_DETACHING;
b0d623f7	177
5ba3f43e	178	error = ifnet_allocate_extended(&pf_init, &pflogif->sc_if);
b0d623f7 A	179	if (error != 0) {
b0d623f7 A	180	printf("%s: ifnet_allocate failed - %d\n", __func__, error);
d9a64523	181	if_clone_softc_deallocate(&pflog_cloner, pflogif);
b0d623f7 A	182	goto done;
	183	}
	184
	185	ifnet_set_mtu(pflogif->sc_if, PFLOGMTU);
	186	ifnet_set_flags(pflogif->sc_if, IFF_UP, IFF_UP);
	187
	188	error = ifnet_attach(pflogif->sc_if, NULL);
	189	if (error != 0) {
	190	printf("%s: ifnet_attach failed - %d\n", __func__, error);
	191	ifnet_release(pflogif->sc_if);
d9a64523	192	if_clone_softc_deallocate(&pflog_cloner, pflogif);
b0d623f7 A	193	goto done;
	194	}
	195
	196	#if NBPFILTER > 0
	197	bpfattach(pflogif->sc_if, DLT_PFLOG, PFLOG_HDRLEN);
	198	#endif
	199
d1ecb069 A	200	lck_rw_lock_shared(pf_perim_lock);
d1ecb069 A	201	lck_mtx_lock(pf_lock);
b0d623f7	202	LIST_INSERT_HEAD(&pflogif_list, pflogif, sc_list);
d1ecb069	203	pflogifs[unit] = pflogif->sc_if;
d9a64523	204	pflogif->sc_flags &= ~IFPFLF_DETACHING;
d1ecb069 A	205	lck_mtx_unlock(pf_lock);
d1ecb069 A	206	lck_rw_done(pf_perim_lock);
b0d623f7	207
d1ecb069	208	done:
0a7de745	209	return error;
b0d623f7 A	210	}
b0d623f7 A	211
d1ecb069	212	static int
d9a64523	213	pflog_remove(struct ifnet *ifp)
b0d623f7	214	{
d9a64523 A	215	int error = 0;
d9a64523 A	216	struct pflog_softc *pflogif = NULL;
b0d623f7	217
d1ecb069 A	218	lck_rw_lock_shared(pf_perim_lock);
d1ecb069 A	219	lck_mtx_lock(pf_lock);
d9a64523 A	220	pflogif = ifp->if_softc;
	221
	222	if (pflogif == NULL \|\|
	223	(pflogif->sc_flags & IFPFLF_DETACHING) != 0) {
	224	error = EINVAL;
	225	goto done;
	226	}
	227
	228	pflogif->sc_flags \|= IFPFLF_DETACHING;
b0d623f7	229	LIST_REMOVE(pflogif, sc_list);
d9a64523	230	done:
d1ecb069 A	231	lck_mtx_unlock(pf_lock);
d1ecb069 A	232	lck_rw_done(pf_perim_lock);
d9a64523 A	233	return error;
d9a64523 A	234	}
b0d623f7	235
d9a64523 A	236	static int
	237	pflog_clone_destroy(struct ifnet *ifp)
	238	{
	239	int error = 0;
d1ecb069	240
0a7de745	241	if ((error = pflog_remove(ifp)) != 0) {
d9a64523	242	goto done;
0a7de745	243	}
d9a64523 A	244	/* bpfdetach() is taken care of as part of interface detach */
	245	(void)ifnet_detach(ifp);
	246	done:
0a7de745	247	return error;
b0d623f7	248	}
b0d623f7 A	249
	250	static errno_t
	251	pflogoutput(struct ifnet ifp, struct mbuf m)
	252	{
39236c6e	253	printf("%s: freeing data for %s\n", __func__, if_name(ifp));
b0d623f7	254	m_freem(m);
0a7de745	255	return ENOTSUP;
b0d623f7 A	256	}
	257
	258	static errno_t
	259	pflogioctl(struct ifnet ifp, unsigned long cmd, void data)
	260	{
	261	#pragma unused(data)
	262	switch (cmd) {
	263	case SIOCSIFADDR:
	264	case SIOCAIFADDR:
	265	case SIOCSIFDSTADDR:
	266	case SIOCSIFFLAGS:
0a7de745	267	if (ifnet_flags(ifp) & IFF_UP) {
b0d623f7	268	ifnet_set_flags(ifp, IFF_RUNNING, IFF_RUNNING);
0a7de745	269	} else {
b0d623f7	270	ifnet_set_flags(ifp, 0, IFF_RUNNING);
0a7de745	271	}
b0d623f7 A	272	break;
b0d623f7 A	273	default:
0a7de745	274	return ENOTTY;
b0d623f7 A	275	}
b0d623f7 A	276
0a7de745	277	return 0;
b0d623f7 A	278	}
	279
	280	static errno_t
	281	pflogdemux(struct ifnet ifp, struct mbuf m, char h, protocol_family_t ppf)
	282	{
	283	#pragma unused(h, ppf)
39236c6e	284	printf("%s: freeing data for %s\n", __func__, if_name(ifp));
b0d623f7	285	m_freem(m);
0a7de745	286	return EJUSTRETURN;
b0d623f7 A	287	}
	288
	289	static errno_t
	290	pflogaddproto(struct ifnet *ifp, protocol_family_t pf,
	291	const struct ifnet_demux_desc *d, u_int32_t cnt)
	292	{
	293	#pragma unused(ifp, pf, d, cnt)
0a7de745	294	return 0;
b0d623f7 A	295	}
	296
	297	static errno_t
	298	pflogdelproto(struct ifnet *ifp, protocol_family_t pf)
	299	{
	300	#pragma unused(ifp, pf)
0a7de745	301	return 0;
b0d623f7 A	302	}
b0d623f7 A	303
d1ecb069 A	304	static void
	305	pflogfree(struct ifnet *ifp)
	306	{
d9a64523	307	if_clone_softc_deallocate(&pflog_cloner, ifp->if_softc);
d1ecb069 A	308	ifp->if_softc = NULL;
	309	(void) ifnet_release(ifp);
	310	}
	311
b0d623f7	312	int
5ba3f43e	313	pflog_packet(struct pfi_kif kif, pbuf_t pbuf, sa_family_t af, u_int8_t dir,
b0d623f7 A	314	u_int8_t reason, struct pf_rule rm, struct pf_rule am,
	315	struct pf_ruleset ruleset, struct pf_pdesc pd)
	316	{
	317	#if NBPFILTER > 0
	318	struct ifnet *ifn;
	319	struct pfloghdr hdr;
5ba3f43e	320	struct mbuf *m;
b0d623f7	321
5ba3f43e	322	LCK_MTX_ASSERT(pf_lock, LCK_MTX_ASSERT_OWNED);
d1ecb069	323
0a7de745 A	324	if (kif == NULL \|\| !pbuf_is_valid(pbuf) \|\| rm == NULL \|\| pd == NULL) {
	325	return -1;
	326	}
b0d623f7 A	327
	328	if (rm->logif >= PFLOGIFS_MAX \|\|
	329	(ifn = pflogifs[rm->logif]) == NULL \|\| !ifn->if_bpf) {
0a7de745	330	return 0;
b0d623f7 A	331	}
b0d623f7 A	332
0a7de745 A	333	if ((m = pbuf_to_mbuf(pbuf, FALSE)) == NULL) {
	334	return 0;
	335	}
5ba3f43e	336
0a7de745	337	bzero(&hdr, sizeof(hdr));
b0d623f7 A	338	hdr.length = PFLOG_REAL_HDRLEN;
	339	hdr.af = af;
	340	hdr.action = rm->action;
	341	hdr.reason = reason;
0a7de745	342	memcpy(hdr.ifname, kif->pfik_name, sizeof(hdr.ifname));
b0d623f7 A	343
	344	if (am == NULL) {
	345	hdr.rulenr = htonl(rm->nr);
	346	hdr.subrulenr = -1;
	347	} else {
	348	hdr.rulenr = htonl(am->nr);
	349	hdr.subrulenr = htonl(rm->nr);
0a7de745	350	if (ruleset != NULL && ruleset->anchor != NULL) {
b0d623f7	351	strlcpy(hdr.ruleset, ruleset->anchor->name,
0a7de745 A	352	sizeof(hdr.ruleset));
0a7de745 A	353	}
b0d623f7	354	}
0a7de745	355	if (rm->log & PF_LOG_SOCKET_LOOKUP && !pd->lookup.done) {
b0d623f7	356	pd->lookup.done = pf_socket_lookup(dir, pd);
0a7de745	357	}
b0d623f7 A	358	if (pd->lookup.done > 0) {
	359	hdr.uid = pd->lookup.uid;
	360	hdr.pid = pd->lookup.pid;
	361	} else {
	362	hdr.uid = UID_MAX;
	363	hdr.pid = NO_PID;
	364	}
	365	hdr.rule_uid = rm->cuid;
	366	hdr.rule_pid = rm->cpid;
	367	hdr.dir = dir;
	368
	369	#if INET
	370	if (af == AF_INET && dir == PF_OUT) {
	371	struct ip *ip;
	372
	373	ip = mtod(m, struct ip *);
	374	ip->ip_sum = 0;
	375	ip->ip_sum = in_cksum(m, ip->ip_hl << 2);
	376	}
	377	#endif /* INET */
	378
6d2010ae A	379	atomic_add_64(&ifn->if_opackets, 1);
6d2010ae A	380	atomic_add_64(&ifn->if_obytes, m->m_pkthdr.len);
b0d623f7 A	381
	382	switch (dir) {
	383	case PF_IN:
	384	bpf_tap_in(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
	385	break;
	386
	387	case PF_OUT:
	388	bpf_tap_out(ifn, DLT_PFLOG, m, &hdr, PFLOG_HDRLEN);
	389	break;
	390
	391	default:
	392	break;
	393	}
	394	#endif /* NBPFILTER > 0 */
0a7de745	395	return 0;
b0d623f7	396	}