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

/*
 * Copyright (c) 2007-2016 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: pf_ruleset.c,v 1.2 2007/08/10 03:00:16 jhw Exp $ */
/*	$OpenBSD: pf_ruleset.c,v 1.1 2006/10/27 13:56:51 mcbride Exp $ */

/*
 * Copyright (c) 2001 Daniel Hartmeier
 * Copyright (c) 2002,2003 Henning Brauer
 * NAT64 - Copyright (c) 2010 Viagenie Inc. (http://www.viagenie.ca)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *    - Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    - 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
 * COPYRIGHT HOLDERS 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.
 *
 * Effort sponsored in part by the Defense Advanced Research Projects
 * Agency (DARPA) and Air Force Research Laboratory, Air Force
 * Materiel Command, USAF, under agreement number F30602-01-2-0537.
 *
 */

#include <sys/param.h>
#include <sys/socket.h>
#ifdef KERNEL
#include <sys/systm.h>
#include <sys/malloc.h>
#include <libkern/libkern.h>
#endif /* KERNEL */
#include <sys/mbuf.h>

#include <netinet/ip_dummynet.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>

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

#if INET6
#include <netinet/ip6.h>
#endif /* INET6 */


#ifdef KERNEL
#define DPFPRINTF(format, x ...)         \
	if (pf_status.debug >= PF_DEBUG_NOISY)  \
	        printf(format, ##x)
#define rs_malloc(x)            _MALLOC(x, M_TEMP, M_WAITOK)
#define rs_free(x)              _FREE(x, M_TEMP)
#define strrchr                 _strrchr

static char *
_strrchr(const char *c, int ch)
{
	char *p = (char *)(size_t)c, *save;

	for (save = NULL;; ++p) {
		if (*p == ch) {
			save = (char *)p;
		}
		if (*p == '\0') {
			return save;
		}
	}
	/* NOTREACHED */
}

#else
/* Userland equivalents so we can lend code to pfctl et al. */

#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define rs_malloc(x)             malloc(x)
#define rs_free(x)               free(x)

#ifdef PFDEBUG
#include <sys/stdarg.h>
#define DPFPRINTF(format, x...) fprintf(stderr, format, ##x)
#else
#define DPFPRINTF(format, x...) ((void)0)
#endif /* PFDEBUG */
#endif /* KERNEL */


struct pf_anchor_global  pf_anchors;
struct pf_anchor         pf_main_anchor;

static __inline int pf_anchor_compare(struct pf_anchor *, struct pf_anchor *);

RB_GENERATE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare);
RB_GENERATE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare);

static __inline int
pf_anchor_compare(struct pf_anchor *a, struct pf_anchor *b)
{
	int c = strcmp(a->path, b->path);

	return c ? (c < 0 ? -1 : 1) : 0;
}

int
pf_get_ruleset_number(u_int8_t action)
{
	switch (action) {
	case PF_SCRUB:
	case PF_NOSCRUB:
		return PF_RULESET_SCRUB;
	case PF_PASS:
	case PF_DROP:
		return PF_RULESET_FILTER;
	case PF_NAT:
	case PF_NONAT:
		return PF_RULESET_NAT;
	case PF_BINAT:
	case PF_NOBINAT:
		return PF_RULESET_BINAT;
	case PF_RDR:
	case PF_NORDR:
	case PF_NAT64:
	case PF_NONAT64:
		return PF_RULESET_RDR;
#if DUMMYNET
	case PF_DUMMYNET:
	case PF_NODUMMYNET:
		return PF_RULESET_DUMMYNET;
#endif /* DUMMYNET */
	default:
		return PF_RULESET_MAX;
	}
}

void
pf_init_ruleset(struct pf_ruleset *ruleset)
{
	int     i;

	memset(ruleset, 0, sizeof(struct pf_ruleset));
	for (i = 0; i < PF_RULESET_MAX; i++) {
		TAILQ_INIT(&ruleset->rules[i].queues[0]);
		TAILQ_INIT(&ruleset->rules[i].queues[1]);
		ruleset->rules[i].active.ptr = &ruleset->rules[i].queues[0];
		ruleset->rules[i].inactive.ptr = &ruleset->rules[i].queues[1];
	}
}

struct pf_anchor *
pf_find_anchor(const char *path)
{
	struct pf_anchor        *key, *found;

	key = (struct pf_anchor *)rs_malloc(sizeof(*key));
	memset(key, 0, sizeof(*key));
	strlcpy(key->path, path, sizeof(key->path));
	found = RB_FIND(pf_anchor_global, &pf_anchors, key);
	rs_free(key);
	return found;
}

struct pf_ruleset *
pf_find_ruleset(const char *path)
{
	struct pf_anchor        *anchor;

	while (*path == '/') {
		path++;
	}
	if (!*path) {
		return &pf_main_ruleset;
	}
	anchor = pf_find_anchor(path);
	if (anchor == NULL) {
		return NULL;
	} else {
		return &anchor->ruleset;
	}
}

struct pf_ruleset *
pf_find_ruleset_with_owner(const char *path, const char *owner, int is_anchor,
    int *error)
{
	struct pf_anchor        *anchor;

	while (*path == '/') {
		path++;
	}
	if (!*path) {
		return &pf_main_ruleset;
	}
	anchor = pf_find_anchor(path);
	if (anchor == NULL) {
		*error = EINVAL;
		return NULL;
	} else {
		if ((owner && (!strcmp(owner, anchor->owner)))
		    || (is_anchor && !strcmp(anchor->owner, ""))) {
			return &anchor->ruleset;
		}
		*error = EPERM;
		return NULL;
	}
}

struct pf_ruleset *
pf_find_or_create_ruleset(const char *path)
{
	char                    *p, *q = NULL, *r;
	struct pf_ruleset       *ruleset;
	struct pf_anchor        *anchor = 0, *dup, *parent = NULL;

	if (path[0] == 0) {
		return &pf_main_ruleset;
	}
	while (*path == '/') {
		path++;
	}
	ruleset = pf_find_ruleset(path);
	if (ruleset != NULL) {
		return ruleset;
	}
	p = (char *)rs_malloc(MAXPATHLEN);
	bzero(p, MAXPATHLEN);
	strlcpy(p, path, MAXPATHLEN);
	while (parent == NULL && (q = strrchr(p, '/')) != NULL) {
		*q = 0;
		if ((ruleset = pf_find_ruleset(p)) != NULL) {
			parent = ruleset->anchor;
			break;
		}
	}
	if (q == NULL) {
		q = p;
	} else {
		q++;
	}
	strlcpy(p, path, MAXPATHLEN);
	if (!*q) {
		rs_free(p);
		return NULL;
	}
	while ((r = strchr(q, '/')) != NULL || *q) {
		if (r != NULL) {
			*r = 0;
		}
		if (!*q || strlen(q) >= PF_ANCHOR_NAME_SIZE ||
		    (parent != NULL && strlen(parent->path) >=
		    MAXPATHLEN - PF_ANCHOR_NAME_SIZE - 1)) {
			rs_free(p);
			return NULL;
		}
		anchor = (struct pf_anchor *)rs_malloc(sizeof(*anchor));
		if (anchor == NULL) {
			rs_free(p);
			return NULL;
		}
		memset(anchor, 0, sizeof(*anchor));
		RB_INIT(&anchor->children);
		strlcpy(anchor->name, q, sizeof(anchor->name));
		if (parent != NULL) {
			strlcpy(anchor->path, parent->path,
			    sizeof(anchor->path));
			strlcat(anchor->path, "/", sizeof(anchor->path));
		}
		strlcat(anchor->path, anchor->name, sizeof(anchor->path));
		if ((dup = RB_INSERT(pf_anchor_global, &pf_anchors, anchor)) !=
		    NULL) {
			printf("pf_find_or_create_ruleset: RB_INSERT1 "
			    "'%s' '%s' collides with '%s' '%s'\n",
			    anchor->path, anchor->name, dup->path, dup->name);
			rs_free(anchor);
			rs_free(p);
			return NULL;
		}
		if (parent != NULL) {
			anchor->parent = parent;
			if ((dup = RB_INSERT(pf_anchor_node, &parent->children,
			    anchor)) != NULL) {
				printf("pf_find_or_create_ruleset: "
				    "RB_INSERT2 '%s' '%s' collides with "
				    "'%s' '%s'\n", anchor->path, anchor->name,
				    dup->path, dup->name);
				RB_REMOVE(pf_anchor_global, &pf_anchors,
				    anchor);
				rs_free(anchor);
				rs_free(p);
				return NULL;
			}
		}
		pf_init_ruleset(&anchor->ruleset);
		anchor->ruleset.anchor = anchor;
		parent = anchor;
		if (r != NULL) {
			q = r + 1;
		} else {
			*q = 0;
		}
#if DUMMYNET
		if (strncmp("com.apple.nlc", anchor->name,
		    sizeof("com.apple.nlc")) == 0) {
			is_nlc_enabled_glb = TRUE;
		}
#endif
	}
	rs_free(p);
	return anchor ? &anchor->ruleset : 0;
}

void
pf_remove_if_empty_ruleset(struct pf_ruleset *ruleset)
{
	struct pf_anchor        *parent;
	int                      i;

	while (ruleset != NULL) {
		if (ruleset == &pf_main_ruleset || ruleset->anchor == NULL ||
		    !RB_EMPTY(&ruleset->anchor->children) ||
		    ruleset->anchor->refcnt > 0 || ruleset->tables > 0 ||
		    ruleset->topen) {
			return;
		}
		for (i = 0; i < PF_RULESET_MAX; ++i) {
			if (!TAILQ_EMPTY(ruleset->rules[i].active.ptr) ||
			    !TAILQ_EMPTY(ruleset->rules[i].inactive.ptr) ||
			    ruleset->rules[i].inactive.open) {
				return;
			}
		}
		RB_REMOVE(pf_anchor_global, &pf_anchors, ruleset->anchor);
#if DUMMYNET
		if (strncmp("com.apple.nlc", ruleset->anchor->name,
		    sizeof("com.apple.nlc")) == 0) {
			struct dummynet_event dn_event;
			bzero(&dn_event, sizeof(dn_event));
			dn_event.dn_event_code = DUMMYNET_NLC_DISABLED;
			dummynet_event_enqueue_nwk_wq_entry(&dn_event);
			is_nlc_enabled_glb = FALSE;
		}
#endif
		if ((parent = ruleset->anchor->parent) != NULL) {
			RB_REMOVE(pf_anchor_node, &parent->children,
			    ruleset->anchor);
		}
		rs_free(ruleset->anchor);
		if (parent == NULL) {
			return;
		}
		ruleset = &parent->ruleset;
	}
}

int
pf_anchor_setup(struct pf_rule *r, const struct pf_ruleset *s,
    const char *name)
{
	char                    *p, *path;
	struct pf_ruleset       *ruleset;

	r->anchor = NULL;
	r->anchor_relative = 0;
	r->anchor_wildcard = 0;
	if (!name[0]) {
		return 0;
	}
	path = (char *)rs_malloc(MAXPATHLEN);
	bzero(path, MAXPATHLEN);
	if (name[0] == '/') {
		strlcpy(path, name + 1, MAXPATHLEN);
	} else {
		/* relative path */
		r->anchor_relative = 1;
		if (s->anchor == NULL || !s->anchor->path[0]) {
			path[0] = 0;
		} else {
			strlcpy(path, s->anchor->path, MAXPATHLEN);
		}
		while (name[0] == '.' && name[1] == '.' && name[2] == '/') {
			if (!path[0]) {
				printf("pf_anchor_setup: .. beyond root\n");
				rs_free(path);
				return 1;
			}
			if ((p = strrchr(path, '/')) != NULL) {
				*p = 0;
			} else {
				path[0] = 0;
			}
			r->anchor_relative++;
			name += 3;
		}
		if (path[0]) {
			strlcat(path, "/", MAXPATHLEN);
		}
		strlcat(path, name, MAXPATHLEN);
	}
	if ((p = strrchr(path, '/')) != NULL && strcmp(p, "/*") == 0) {
		r->anchor_wildcard = 1;
		*p = 0;
	}
	ruleset = pf_find_or_create_ruleset(path);
	rs_free(path);
	if (ruleset == NULL || ruleset->anchor == NULL) {
		printf("pf_anchor_setup: ruleset\n");
		return 1;
	}
	r->anchor = ruleset->anchor;
	r->anchor->refcnt++;
	return 0;
}

int
pf_anchor_copyout(const struct pf_ruleset *rs, const struct pf_rule *r,
    struct pfioc_rule *pr)
{
	pr->anchor_call[0] = 0;
	if (r->anchor == NULL) {
		return 0;
	}
	if (!r->anchor_relative) {
		strlcpy(pr->anchor_call, "/", sizeof(pr->anchor_call));
		strlcat(pr->anchor_call, r->anchor->path,
		    sizeof(pr->anchor_call));
	} else {
		char    *a, *p;
		int      i;

		a = (char *)rs_malloc(MAXPATHLEN);
		bzero(a, MAXPATHLEN);
		if (rs->anchor == NULL) {
			a[0] = 0;
		} else {
			strlcpy(a, rs->anchor->path, MAXPATHLEN);
		}
		for (i = 1; i < r->anchor_relative; ++i) {
			if ((p = strrchr(a, '/')) == NULL) {
				p = a;
			}
			*p = 0;
			strlcat(pr->anchor_call, "../",
			    sizeof(pr->anchor_call));
		}
		if (strncmp(a, r->anchor->path, strlen(a))) {
			printf("pf_anchor_copyout: '%s' '%s'\n", a,
			    r->anchor->path);
			rs_free(a);
			return 1;
		}
		if (strlen(r->anchor->path) > strlen(a)) {
			strlcat(pr->anchor_call, r->anchor->path + (a[0] ?
			    strlen(a) + 1 : 0), sizeof(pr->anchor_call));
		}
		rs_free(a);
	}
	if (r->anchor_wildcard) {
		strlcat(pr->anchor_call, pr->anchor_call[0] ? "/*" : "*",
		    sizeof(pr->anchor_call));
	}
	return 0;
}

void
pf_anchor_remove(struct pf_rule *r)
{
	if (r->anchor == NULL) {
		return;
	}
	if (r->anchor->refcnt <= 0) {
		printf("pf_anchor_remove: broken refcount\n");
		r->anchor = NULL;
		return;
	}
	if (!--r->anchor->refcnt) {
		pf_remove_if_empty_ruleset(&r->anchor->ruleset);
	}
	r->anchor = NULL;
}
Commit	Line	Data
b0d623f7	1	/*
39037602	2	* Copyright (c) 2007-2016 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: pf_ruleset.c,v 1.2 2007/08/10 03:00:16 jhw Exp $ */
	30	/* $OpenBSD: pf_ruleset.c,v 1.1 2006/10/27 13:56:51 mcbride Exp $ */
	31
	32	/*
	33	* Copyright (c) 2001 Daniel Hartmeier
	34	* Copyright (c) 2002,2003 Henning Brauer
3e170ce0	35	* NAT64 - Copyright (c) 2010 Viagenie Inc. (http://www.viagenie.ca)
b0d623f7 A	36	* All rights reserved.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	*
	42	* - Redistributions of source code must retain the above copyright
	43	* notice, this list of conditions and the following disclaimer.
	44	* - Redistributions in binary form must reproduce the above
	45	* copyright notice, this list of conditions and the following
	46	* disclaimer in the documentation and/or other materials provided
	47	* with the distribution.
	48	*
	49	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	50	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	51	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
	52	* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	53	* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	54	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
	55	* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	56	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	57	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	58	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
	59	* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	60	* POSSIBILITY OF SUCH DAMAGE.
	61	*
	62	* Effort sponsored in part by the Defense Advanced Research Projects
	63	* Agency (DARPA) and Air Force Research Laboratory, Air Force
	64	* Materiel Command, USAF, under agreement number F30602-01-2-0537.
	65	*
	66	*/
	67
	68	#include <sys/param.h>
	69	#include <sys/socket.h>
	70	#ifdef KERNEL
	71	#include <sys/systm.h>
	72	#include <sys/malloc.h>
	73	#include <libkern/libkern.h>
	74	#endif /* KERNEL */
	75	#include <sys/mbuf.h>
	76
5ba3f43e	77	#include <netinet/ip_dummynet.h>
b0d623f7 A	78	#include <netinet/in.h>
	79	#include <netinet/in_systm.h>
	80	#include <netinet/ip.h>
	81	#include <netinet/tcp.h>
	82
	83	#include <net/if.h>
	84	#include <net/pfvar.h>
	85
	86	#if INET6
	87	#include <netinet/ip6.h>
	88	#endif /* INET6 */
	89
	90
	91	#ifdef KERNEL
0a7de745 A	92	#define DPFPRINTF(format, x ...) \
	93	if (pf_status.debug >= PF_DEBUG_NOISY) \
	94	printf(format, ##x)
	95	#define rs_malloc(x) _MALLOC(x, M_TEMP, M_WAITOK)
	96	#define rs_free(x) _FREE(x, M_TEMP)
	97	#define strrchr _strrchr
b0d623f7 A	98
	99	static char *
	100	_strrchr(const char *c, int ch)
	101	{
	102	char p = (char )(size_t)c, *save;
	103
0a7de745 A	104	for (save = NULL;; ++p) {
0a7de745 A	105	if (*p == ch) {
b0d623f7	106	save = (char *)p;
0a7de745 A	107	}
	108	if (*p == '\0') {
	109	return save;
	110	}
b0d623f7 A	111	}
	112	/* NOTREACHED */
	113	}
	114
	115	#else
	116	/* Userland equivalents so we can lend code to pfctl et al. */
	117
	118	#include <arpa/inet.h>
	119	#include <errno.h>
	120	#include <stdio.h>
	121	#include <stdlib.h>
	122	#include <string.h>
0a7de745 A	123	#define rs_malloc(x) malloc(x)
0a7de745 A	124	#define rs_free(x) free(x)
b0d623f7 A	125
	126	#ifdef PFDEBUG
	127	#include <sys/stdarg.h>
0a7de745	128	#define DPFPRINTF(format, x...) fprintf(stderr, format, ##x)
b0d623f7	129	#else
0a7de745	130	#define DPFPRINTF(format, x...) ((void)0)
b0d623f7 A	131	#endif /* PFDEBUG */
	132	#endif /* KERNEL */
	133
	134
0a7de745 A	135	struct pf_anchor_global pf_anchors;
0a7de745 A	136	struct pf_anchor pf_main_anchor;
b0d623f7 A	137
	138	static __inline int pf_anchor_compare(struct pf_anchor , struct pf_anchor );
	139
	140	RB_GENERATE(pf_anchor_global, pf_anchor, entry_global, pf_anchor_compare);
	141	RB_GENERATE(pf_anchor_node, pf_anchor, entry_node, pf_anchor_compare);
	142
	143	static __inline int
	144	pf_anchor_compare(struct pf_anchor a, struct pf_anchor b)
	145	{
	146	int c = strcmp(a->path, b->path);
	147
0a7de745	148	return c ? (c < 0 ? -1 : 1) : 0;
b0d623f7 A	149	}
	150
	151	int
	152	pf_get_ruleset_number(u_int8_t action)
	153	{
	154	switch (action) {
	155	case PF_SCRUB:
	156	case PF_NOSCRUB:
0a7de745	157	return PF_RULESET_SCRUB;
b0d623f7 A	158	case PF_PASS:
b0d623f7 A	159	case PF_DROP:
0a7de745	160	return PF_RULESET_FILTER;
b0d623f7 A	161	case PF_NAT:
b0d623f7 A	162	case PF_NONAT:
0a7de745	163	return PF_RULESET_NAT;
b0d623f7 A	164	case PF_BINAT:
b0d623f7 A	165	case PF_NOBINAT:
0a7de745	166	return PF_RULESET_BINAT;
b0d623f7 A	167	case PF_RDR:
b0d623f7 A	168	case PF_NORDR:
3e170ce0 A	169	case PF_NAT64:
3e170ce0 A	170	case PF_NONAT64:
0a7de745	171	return PF_RULESET_RDR;
316670eb A	172	#if DUMMYNET
	173	case PF_DUMMYNET:
	174	case PF_NODUMMYNET:
0a7de745	175	return PF_RULESET_DUMMYNET;
316670eb	176	#endif /* DUMMYNET */
b0d623f7	177	default:
0a7de745	178	return PF_RULESET_MAX;
b0d623f7 A	179	}
	180	}
	181
	182	void
	183	pf_init_ruleset(struct pf_ruleset *ruleset)
	184	{
0a7de745	185	int i;
b0d623f7	186
0a7de745	187	memset(ruleset, 0, sizeof(struct pf_ruleset));
b0d623f7 A	188	for (i = 0; i < PF_RULESET_MAX; i++) {
	189	TAILQ_INIT(&ruleset->rules[i].queues[0]);
	190	TAILQ_INIT(&ruleset->rules[i].queues[1]);
	191	ruleset->rules[i].active.ptr = &ruleset->rules[i].queues[0];
	192	ruleset->rules[i].inactive.ptr = &ruleset->rules[i].queues[1];
	193	}
	194	}
	195
	196	struct pf_anchor *
	197	pf_find_anchor(const char *path)
	198	{
0a7de745	199	struct pf_anchor key, found;
b0d623f7	200
0a7de745 A	201	key = (struct pf_anchor )rs_malloc(sizeof(key));
	202	memset(key, 0, sizeof(*key));
	203	strlcpy(key->path, path, sizeof(key->path));
b0d623f7 A	204	found = RB_FIND(pf_anchor_global, &pf_anchors, key);
b0d623f7 A	205	rs_free(key);
0a7de745	206	return found;
b0d623f7 A	207	}
	208
	209	struct pf_ruleset *
	210	pf_find_ruleset(const char *path)
	211	{
0a7de745	212	struct pf_anchor *anchor;
b0d623f7	213
0a7de745	214	while (*path == '/') {
b0d623f7	215	path++;
0a7de745 A	216	}
	217	if (!*path) {
	218	return &pf_main_ruleset;
	219	}
b0d623f7	220	anchor = pf_find_anchor(path);
0a7de745 A	221	if (anchor == NULL) {
	222	return NULL;
	223	} else {
	224	return &anchor->ruleset;
	225	}
b0d623f7 A	226	}
b0d623f7 A	227
316670eb A	228	struct pf_ruleset *
	229	pf_find_ruleset_with_owner(const char path, const char owner, int is_anchor,
	230	int *error)
	231	{
0a7de745	232	struct pf_anchor *anchor;
316670eb	233
0a7de745	234	while (*path == '/') {
316670eb	235	path++;
0a7de745 A	236	}
	237	if (!*path) {
	238	return &pf_main_ruleset;
	239	}
316670eb A	240	anchor = pf_find_anchor(path);
	241	if (anchor == NULL) {
	242	*error = EINVAL;
0a7de745	243	return NULL;
316670eb	244	} else {
3e170ce0	245	if ((owner && (!strcmp(owner, anchor->owner)))
0a7de745 A	246	\|\| (is_anchor && !strcmp(anchor->owner, ""))) {
	247	return &anchor->ruleset;
	248	}
316670eb A	249	*error = EPERM;
	250	return NULL;
	251	}
	252	}
	253
b0d623f7 A	254	struct pf_ruleset *
	255	pf_find_or_create_ruleset(const char *path)
	256	{
0a7de745 A	257	char p, q = NULL, *r;
	258	struct pf_ruleset *ruleset;
	259	struct pf_anchor anchor = 0, dup, *parent = NULL;
b0d623f7	260
0a7de745 A	261	if (path[0] == 0) {
	262	return &pf_main_ruleset;
	263	}
	264	while (*path == '/') {
b0d623f7	265	path++;
0a7de745	266	}
b0d623f7	267	ruleset = pf_find_ruleset(path);
0a7de745 A	268	if (ruleset != NULL) {
	269	return ruleset;
	270	}
b0d623f7 A	271	p = (char *)rs_malloc(MAXPATHLEN);
	272	bzero(p, MAXPATHLEN);
	273	strlcpy(p, path, MAXPATHLEN);
	274	while (parent == NULL && (q = strrchr(p, '/')) != NULL) {
	275	*q = 0;
	276	if ((ruleset = pf_find_ruleset(p)) != NULL) {
	277	parent = ruleset->anchor;
	278	break;
	279	}
	280	}
0a7de745	281	if (q == NULL) {
b0d623f7	282	q = p;
0a7de745	283	} else {
b0d623f7	284	q++;
0a7de745	285	}
b0d623f7 A	286	strlcpy(p, path, MAXPATHLEN);
	287	if (!*q) {
	288	rs_free(p);
0a7de745	289	return NULL;
b0d623f7 A	290	}
b0d623f7 A	291	while ((r = strchr(q, '/')) != NULL \|\| *q) {
0a7de745	292	if (r != NULL) {
b0d623f7	293	*r = 0;
0a7de745	294	}
b0d623f7 A	295	if (!*q \|\| strlen(q) >= PF_ANCHOR_NAME_SIZE \|\|
	296	(parent != NULL && strlen(parent->path) >=
	297	MAXPATHLEN - PF_ANCHOR_NAME_SIZE - 1)) {
	298	rs_free(p);
0a7de745	299	return NULL;
b0d623f7	300	}
0a7de745	301	anchor = (struct pf_anchor )rs_malloc(sizeof(anchor));
b0d623f7 A	302	if (anchor == NULL) {
b0d623f7 A	303	rs_free(p);
0a7de745	304	return NULL;
b0d623f7	305	}
0a7de745	306	memset(anchor, 0, sizeof(*anchor));
b0d623f7	307	RB_INIT(&anchor->children);
0a7de745	308	strlcpy(anchor->name, q, sizeof(anchor->name));
b0d623f7 A	309	if (parent != NULL) {
b0d623f7 A	310	strlcpy(anchor->path, parent->path,
0a7de745 A	311	sizeof(anchor->path));
0a7de745 A	312	strlcat(anchor->path, "/", sizeof(anchor->path));
b0d623f7	313	}
0a7de745	314	strlcat(anchor->path, anchor->name, sizeof(anchor->path));
b0d623f7 A	315	if ((dup = RB_INSERT(pf_anchor_global, &pf_anchors, anchor)) !=
	316	NULL) {
	317	printf("pf_find_or_create_ruleset: RB_INSERT1 "
	318	"'%s' '%s' collides with '%s' '%s'\n",
	319	anchor->path, anchor->name, dup->path, dup->name);
	320	rs_free(anchor);
	321	rs_free(p);
0a7de745	322	return NULL;
b0d623f7 A	323	}
	324	if (parent != NULL) {
	325	anchor->parent = parent;
	326	if ((dup = RB_INSERT(pf_anchor_node, &parent->children,
	327	anchor)) != NULL) {
	328	printf("pf_find_or_create_ruleset: "
	329	"RB_INSERT2 '%s' '%s' collides with "
	330	"'%s' '%s'\n", anchor->path, anchor->name,
	331	dup->path, dup->name);
	332	RB_REMOVE(pf_anchor_global, &pf_anchors,
	333	anchor);
	334	rs_free(anchor);
	335	rs_free(p);
0a7de745	336	return NULL;
b0d623f7 A	337	}
	338	}
	339	pf_init_ruleset(&anchor->ruleset);
	340	anchor->ruleset.anchor = anchor;
	341	parent = anchor;
0a7de745	342	if (r != NULL) {
b0d623f7	343	q = r + 1;
0a7de745	344	} else {
b0d623f7	345	*q = 0;
0a7de745	346	}
5ba3f43e	347	#if DUMMYNET
0a7de745 A	348	if (strncmp("com.apple.nlc", anchor->name,
0a7de745 A	349	sizeof("com.apple.nlc")) == 0) {
5ba3f43e	350	is_nlc_enabled_glb = TRUE;
0a7de745	351	}
5ba3f43e	352	#endif
b0d623f7 A	353	}
b0d623f7 A	354	rs_free(p);
0a7de745	355	return anchor ? &anchor->ruleset : 0;
b0d623f7 A	356	}
	357
	358	void
	359	pf_remove_if_empty_ruleset(struct pf_ruleset *ruleset)
	360	{
0a7de745 A	361	struct pf_anchor *parent;
0a7de745 A	362	int i;
b0d623f7 A	363
	364	while (ruleset != NULL) {
	365	if (ruleset == &pf_main_ruleset \|\| ruleset->anchor == NULL \|\|
	366	!RB_EMPTY(&ruleset->anchor->children) \|\|
	367	ruleset->anchor->refcnt > 0 \|\| ruleset->tables > 0 \|\|
0a7de745	368	ruleset->topen) {
b0d623f7	369	return;
0a7de745 A	370	}
0a7de745 A	371	for (i = 0; i < PF_RULESET_MAX; ++i) {
b0d623f7 A	372	if (!TAILQ_EMPTY(ruleset->rules[i].active.ptr) \|\|
b0d623f7 A	373	!TAILQ_EMPTY(ruleset->rules[i].inactive.ptr) \|\|
0a7de745	374	ruleset->rules[i].inactive.open) {
b0d623f7	375	return;
0a7de745 A	376	}
0a7de745 A	377	}
b0d623f7	378	RB_REMOVE(pf_anchor_global, &pf_anchors, ruleset->anchor);
5ba3f43e	379	#if DUMMYNET
0a7de745	380	if (strncmp("com.apple.nlc", ruleset->anchor->name,
5ba3f43e A	381	sizeof("com.apple.nlc")) == 0) {
	382	struct dummynet_event dn_event;
	383	bzero(&dn_event, sizeof(dn_event));
	384	dn_event.dn_event_code = DUMMYNET_NLC_DISABLED;
	385	dummynet_event_enqueue_nwk_wq_entry(&dn_event);
	386	is_nlc_enabled_glb = FALSE;
	387	}
	388	#endif
0a7de745	389	if ((parent = ruleset->anchor->parent) != NULL) {
b0d623f7 A	390	RB_REMOVE(pf_anchor_node, &parent->children,
b0d623f7 A	391	ruleset->anchor);
0a7de745	392	}
b0d623f7	393	rs_free(ruleset->anchor);
0a7de745	394	if (parent == NULL) {
b0d623f7	395	return;
0a7de745	396	}
b0d623f7 A	397	ruleset = &parent->ruleset;
	398	}
	399	}
	400
	401	int
	402	pf_anchor_setup(struct pf_rule r, const struct pf_ruleset s,
	403	const char *name)
	404	{
0a7de745 A	405	char p, path;
0a7de745 A	406	struct pf_ruleset *ruleset;
b0d623f7 A	407
	408	r->anchor = NULL;
	409	r->anchor_relative = 0;
	410	r->anchor_wildcard = 0;
0a7de745 A	411	if (!name[0]) {
	412	return 0;
	413	}
b0d623f7 A	414	path = (char *)rs_malloc(MAXPATHLEN);
b0d623f7 A	415	bzero(path, MAXPATHLEN);
0a7de745	416	if (name[0] == '/') {
b0d623f7	417	strlcpy(path, name + 1, MAXPATHLEN);
0a7de745	418	} else {
b0d623f7 A	419	/* relative path */
b0d623f7 A	420	r->anchor_relative = 1;
0a7de745	421	if (s->anchor == NULL \|\| !s->anchor->path[0]) {
b0d623f7	422	path[0] = 0;
0a7de745	423	} else {
b0d623f7	424	strlcpy(path, s->anchor->path, MAXPATHLEN);
0a7de745	425	}
b0d623f7 A	426	while (name[0] == '.' && name[1] == '.' && name[2] == '/') {
	427	if (!path[0]) {
	428	printf("pf_anchor_setup: .. beyond root\n");
	429	rs_free(path);
0a7de745	430	return 1;
b0d623f7	431	}
0a7de745	432	if ((p = strrchr(path, '/')) != NULL) {
b0d623f7	433	*p = 0;
0a7de745	434	} else {
b0d623f7	435	path[0] = 0;
0a7de745	436	}
b0d623f7 A	437	r->anchor_relative++;
	438	name += 3;
	439	}
0a7de745	440	if (path[0]) {
b0d623f7	441	strlcat(path, "/", MAXPATHLEN);
0a7de745	442	}
b0d623f7 A	443	strlcat(path, name, MAXPATHLEN);
	444	}
	445	if ((p = strrchr(path, '/')) != NULL && strcmp(p, "/*") == 0) {
	446	r->anchor_wildcard = 1;
	447	*p = 0;
	448	}
	449	ruleset = pf_find_or_create_ruleset(path);
	450	rs_free(path);
	451	if (ruleset == NULL \|\| ruleset->anchor == NULL) {
	452	printf("pf_anchor_setup: ruleset\n");
0a7de745	453	return 1;
b0d623f7 A	454	}
	455	r->anchor = ruleset->anchor;
	456	r->anchor->refcnt++;
0a7de745	457	return 0;
b0d623f7 A	458	}
	459
	460	int
	461	pf_anchor_copyout(const struct pf_ruleset rs, const struct pf_rule r,
	462	struct pfioc_rule *pr)
	463	{
	464	pr->anchor_call[0] = 0;
0a7de745 A	465	if (r->anchor == NULL) {
	466	return 0;
	467	}
b0d623f7	468	if (!r->anchor_relative) {
0a7de745	469	strlcpy(pr->anchor_call, "/", sizeof(pr->anchor_call));
b0d623f7	470	strlcat(pr->anchor_call, r->anchor->path,
0a7de745	471	sizeof(pr->anchor_call));
b0d623f7	472	} else {
0a7de745 A	473	char a, p;
0a7de745 A	474	int i;
b0d623f7 A	475
	476	a = (char *)rs_malloc(MAXPATHLEN);
	477	bzero(a, MAXPATHLEN);
0a7de745	478	if (rs->anchor == NULL) {
b0d623f7	479	a[0] = 0;
0a7de745	480	} else {
b0d623f7	481	strlcpy(a, rs->anchor->path, MAXPATHLEN);
0a7de745	482	}
b0d623f7	483	for (i = 1; i < r->anchor_relative; ++i) {
0a7de745	484	if ((p = strrchr(a, '/')) == NULL) {
b0d623f7	485	p = a;
0a7de745	486	}
b0d623f7 A	487	*p = 0;
b0d623f7 A	488	strlcat(pr->anchor_call, "../",
0a7de745	489	sizeof(pr->anchor_call));
b0d623f7 A	490	}
	491	if (strncmp(a, r->anchor->path, strlen(a))) {
	492	printf("pf_anchor_copyout: '%s' '%s'\n", a,
	493	r->anchor->path);
	494	rs_free(a);
0a7de745	495	return 1;
b0d623f7	496	}
0a7de745	497	if (strlen(r->anchor->path) > strlen(a)) {
b0d623f7	498	strlcat(pr->anchor_call, r->anchor->path + (a[0] ?
0a7de745 A	499	strlen(a) + 1 : 0), sizeof(pr->anchor_call));
0a7de745 A	500	}
b0d623f7 A	501	rs_free(a);
b0d623f7 A	502	}
0a7de745	503	if (r->anchor_wildcard) {
b0d623f7	504	strlcat(pr->anchor_call, pr->anchor_call[0] ? "/" : "",
0a7de745 A	505	sizeof(pr->anchor_call));
	506	}
	507	return 0;
b0d623f7 A	508	}
	509
	510	void
	511	pf_anchor_remove(struct pf_rule *r)
	512	{
0a7de745	513	if (r->anchor == NULL) {
b0d623f7	514	return;
0a7de745	515	}
b0d623f7 A	516	if (r->anchor->refcnt <= 0) {
	517	printf("pf_anchor_remove: broken refcount\n");
	518	r->anchor = NULL;
	519	return;
	520	}
0a7de745	521	if (!--r->anchor->refcnt) {
b0d623f7	522	pf_remove_if_empty_ruleset(&r->anchor->ruleset);
0a7de745	523	}
b0d623f7 A	524	r->anchor = NULL;
b0d623f7 A	525	}