[apple/ipsec.git] / ipsec-tools / racoon / policy.c

/*	$KAME: policy.c,v 1.46 2001/11/16 04:08:10 sakane Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
 */

#include "config.h"

#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>

#include <netinet/in.h>
#ifdef HAVE_NETINET6_IPSEC
#  include <netinet6/ipsec.h>
#else
#  include <netinet/ipsec.h>
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>

#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "sockmisc.h"
#include "debug.h"

#include "policy.h"
#include "localconf.h"
#include "isakmp_var.h"
#include "isakmp.h"
#include "oakley.h"
#include "handler.h"
#include "strnames.h"
#include "gcmalloc.h"
#include "session.h"

static TAILQ_HEAD(_sptree, secpolicy) sptree;

/* perform exact match against security policy table. */
struct secpolicy *
getsp(spidx)
	struct policyindex *spidx;
{
	struct secpolicy *p;

	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
		if (!cmpspidxstrict(spidx, &p->spidx))
			return p;
	}

	return NULL;
}

/*
 * perform non-exact match against security policy table, only if this is
 * transport mode SA negotiation.  for example, 0.0.0.0/0 -> 0.0.0.0/0
 * entry in policy.txt can be returned when we're negotiating transport
 * mode SA.  this is how the kernel works.
 */
#if 1
struct secpolicy *
getsp_r(spidx, iph2)
	struct policyindex *spidx;
	phase2_handle_t *iph2;
{
	struct secpolicy *p;
	int mismatched_outer_addr = 0;

	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
		if (!cmpspidxwild(spidx, &p->spidx)) {
			if (spidx->dir != IPSEC_DIR_ANY) {
				struct ipsecrequest *isr;
				for (isr = p->req; isr != NULL; isr = isr->next) {
					if (isr->saidx.mode != IPSEC_MODE_TUNNEL) {
						plog(ASL_LEVEL_DEBUG, "%s, skipping policy. dir %d, mode %d\n",
							 __FUNCTION__, spidx->dir, isr->saidx.mode);
						continue;
					}

					// for tunnel mode: verify the outer ip addresses match the phase2's addresses
					if (spidx->dir == IPSEC_DIR_INBOUND) {
						// TODO: look out for wildcards
						if (!cmpsaddrwop(iph2->dst, &isr->saidx.src) &&
							!cmpsaddrwop(iph2->src, &isr->saidx.dst)) {
							plog(ASL_LEVEL_DEBUG, "%s, inbound policy outer addresses matched Phase 2 addresses\n",
								 __FUNCTION__);
							return p;
						} else {
							mismatched_outer_addr = 1;
						}
					} else if (spidx->dir == IPSEC_DIR_OUTBOUND) {
						// TODO: look out for wildcards
						if (!cmpsaddrwop(iph2->src, &isr->saidx.src) &&
							!cmpsaddrwop(iph2->dst, &isr->saidx.dst)) {
							plog(ASL_LEVEL_DEBUG, "%s, outbound policy outer addresses matched Phase 2 addresses\n",
								 __FUNCTION__);
							return p;
						} else {
							mismatched_outer_addr = 1;
						}
					} else {
						mismatched_outer_addr = 1;
					}
					if (mismatched_outer_addr) {
						plog(ASL_LEVEL_DEBUG, "%s, policy outer addresses matched Phase 2 addresses: dir %d\n",
							 __FUNCTION__, spidx->dir);
						plog(ASL_LEVEL_DEBUG, "src1: %s\n",
							 saddr2str((struct sockaddr *)iph2->src));
						plog(ASL_LEVEL_DEBUG, "src2: %s\n",
							 saddr2str((struct sockaddr *)&isr->saidx.src));
						plog(ASL_LEVEL_DEBUG, "dst1: %s\n",
							 saddr2str((struct sockaddr *)iph2->dst));
						plog(ASL_LEVEL_DEBUG, "dst2: %s\n",
							 saddr2str((struct sockaddr *)&isr->saidx.dst));
					}
				}
			}
			if (!mismatched_outer_addr) {
				return p;
			}
		}
	}

	return NULL;
}
#else
struct secpolicy *
getsp_r(spidx, iph2)
	struct policyindex *spidx;
	phase2_handle_t *iph2;
{
	struct secpolicy *p;
	u_int8_t prefixlen;

	plog(ASL_LEVEL_DEBUG, "checking for transport mode\n");

	if (spidx->src.ss_family != spidx->dst.ss_family) {
		plog(ASL_LEVEL_ERR, 
			"address family mismatch, src:%d dst:%d\n",
				spidx->src.ss_family,
				spidx->dst.ss_family);
		return NULL;
	}
	switch (spidx->src.ss_family) {
	case AF_INET:
		prefixlen = sizeof(struct in_addr) << 3;
		break;
#ifdef INET6
	case AF_INET6:
		prefixlen = sizeof(struct in6_addr) << 3;
		break;
#endif
	default:
		plog(ASL_LEVEL_ERR, 
			"invalid family: %d\n", spidx->src.ss_family);
		return NULL;
	}

	/* is it transport mode SA negotiation? */
	plog(ASL_LEVEL_DEBUG, "src1: %s\n",
		saddr2str(iph2->src));
	plog(ASL_LEVEL_DEBUG, "src2: %s\n",
		saddr2str(&spidx->src));
	if (cmpsaddrwop(iph2->src, &spidx->src)
	 || spidx->prefs != prefixlen)
		return NULL;

	plog(ASL_LEVEL_DEBUG, "dst1: %s\n",
		saddr2str(iph2->dst));
	plog(ASL_LEVEL_DEBUG, "dst2: %s\n",
		saddr2str(&spidx->dst));
	if (cmpsaddrwop(iph2->dst, &spidx->dst)
	 || spidx->prefd != prefixlen)
		return NULL;

	plog(ASL_LEVEL_DEBUG, "looks to be transport mode\n");

	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
		if (!cmpspidx_wild(spidx, &p->spidx))
			return p;
	}

	return NULL;
}
#endif

struct secpolicy *
getspbyspid(spid)
	u_int32_t spid;
{
	struct secpolicy *p;

	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
		if (p->id == spid)
			return p;
	}

	return NULL;
}

/*
 * compare policyindex.
 * a: subject b: db
 * OUT:	0:	equal
 *	1:	not equal
 */
int
cmpspidxstrict(a, b)
	struct policyindex *a, *b;
{

	/* XXX don't check direction now, but it's to be checked carefully. */
	if (a->dir != b->dir
	 || a->prefs != b->prefs
	 || a->prefd != b->prefd
	 || a->ul_proto != b->ul_proto)
		return 1;

	if (cmpsaddrstrict(&a->src, &b->src))
		return 1;
	if (cmpsaddrstrict(&a->dst, &b->dst))
		return 1;

	return 0;
}

/*
 * compare policyindex, with wildcard address/protocol match.
 * a: subject b: db, can contain wildcard things.
 * OUT:	0:	equal
 *	1:	not equal
 */
int
cmpspidxwild(a, b)
	struct policyindex *a, *b;
{
	struct sockaddr_storage sa1, sa2;

	if (!(b->dir == IPSEC_DIR_ANY || a->dir == b->dir))
		return 1;

	if (!(a->ul_proto == IPSEC_ULPROTO_ANY ||
	      b->ul_proto == IPSEC_ULPROTO_ANY ||
	      a->ul_proto == b->ul_proto))
		return 1;

	if (a->src.ss_family != b->src.ss_family)
		return 1;
	if (a->dst.ss_family != b->dst.ss_family)
		return 1;

	/* compare src address */
	if (sizeof(sa1) < a->src.ss_len || sizeof(sa2) < b->src.ss_len) {
		plog(ASL_LEVEL_ERR, 
			"unexpected error: "
			"src.ss_len:%d dst.ss_len:%d\n",
			a->src.ss_len, b->src.ss_len);
		return 1;
	}
	mask_sockaddr(&sa1, &a->src, b->prefs);
	mask_sockaddr(&sa2, &b->src, b->prefs);
	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
		a, b->prefs, saddr2str((struct sockaddr *)&sa1));
	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
		b, b->prefs, saddr2str((struct sockaddr *)&sa2));
	if (cmpsaddrwild(&sa1, &sa2))
		return 1;

	/* compare dst address */
	if (sizeof(sa1) < a->dst.ss_len || sizeof(sa2) < b->dst.ss_len) {
		plog(ASL_LEVEL_ERR, "unexpected error\n");
		exit(1);
	}
	mask_sockaddr(&sa1, &a->dst, b->prefd);
	mask_sockaddr(&sa2, &b->dst, b->prefd);
	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
		a, b->prefd, saddr2str((struct sockaddr *)&sa1));
	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
		b, b->prefd, saddr2str((struct sockaddr *)&sa2));
	if (cmpsaddrwild(&sa1, &sa2))
		return 1;

	return 0;
}

struct secpolicy *
newsp()
{
	struct secpolicy *new;

	new = racoon_calloc(1, sizeof(*new));
	if (new == NULL)
		return NULL;

	return new;
}

void
delsp(sp)
	struct secpolicy *sp;
{
	struct ipsecrequest *req = NULL, *next;

	for (req = sp->req; req; req = next) {
		next = req->next;
		racoon_free(req);
	}
	
	racoon_free(sp);
}

void
delsp_bothdir(spidx0)
	struct policyindex *spidx0;
{
	struct policyindex spidx;
	struct secpolicy *sp;
	struct sockaddr_storage src, dst;
	u_int8_t prefs, prefd;

	memcpy(&spidx, spidx0, sizeof(spidx));
	switch (spidx.dir) {
	case IPSEC_DIR_INBOUND:
#ifdef HAVE_POLICY_FWD
	case IPSEC_DIR_FWD:
#endif
		src   = spidx.src;
		dst   = spidx.dst;
		prefs = spidx.prefs;
		prefd = spidx.prefd;
		break;
	case IPSEC_DIR_OUTBOUND:
		src   = spidx.dst;
		dst   = spidx.src;
		prefs = spidx.prefd;
		prefd = spidx.prefs;
		break;
	default:
		return;
	}

	spidx.src   = src;
	spidx.dst   = dst;
	spidx.prefs = prefs;
	spidx.prefd = prefd;
	spidx.dir   = IPSEC_DIR_INBOUND;

	sp = getsp(&spidx);
	if (sp) {
		remsp(sp);
		delsp(sp);
	}

#ifdef HAVE_POLICY_FWD
	spidx.dir   = IPSEC_DIR_FWD;

	sp = getsp(&spidx);
	if (sp) {
		remsp(sp);
		delsp(sp);
	}
#endif

	spidx.src   = dst;
	spidx.dst   = src;
	spidx.prefs = prefd;
	spidx.prefd = prefs;
	spidx.dir   = IPSEC_DIR_OUTBOUND;

	sp = getsp(&spidx);
	if (sp) {
		remsp(sp);
		delsp(sp);
	}
}

void
inssp(new)
	struct secpolicy *new;
{
#ifdef HAVE_PFKEY_POLICY_PRIORITY
	struct secpolicy *p;

	TAILQ_FOREACH(p, &sptree, chain) {
		if (new->spidx.priority < p->spidx.priority) {
			TAILQ_INSERT_BEFORE(p, new, chain);
			return;
		}
	}
	if (p == NULL)
#endif
	        TAILQ_INSERT_HEAD(&sptree, new, chain);

	check_auto_exit();
	return;
}

void
remsp(sp)
	struct secpolicy *sp;
{
	TAILQ_REMOVE(&sptree, sp, chain);
	check_auto_exit();
}

void
flushsp()
{
	struct secpolicy *p, *next;

	for (p = TAILQ_FIRST(&sptree); p; p = next) {
		next = TAILQ_NEXT(p, chain);
		remsp(p);
		delsp(p);
	}
}

int
policies_installed(void)
{
	if (TAILQ_EMPTY(&sptree))
		return 0;
	else
		return 1;
}

void
initsp()
{
	TAILQ_INIT(&sptree);
}

struct ipsecrequest *
newipsecreq()
{
	struct ipsecrequest *new;

	new = racoon_calloc(1, sizeof(*new));
	if (new == NULL)
		return NULL;

	return new;
}

const char *
spidx2str(spidx)
	const struct policyindex *spidx;
{
	/* addr/pref[port] addr/pref[port] ul dir act */
	static char buf[256];
	char *p, *a, *b;
	int blen, i;

	blen = sizeof(buf) - 1;
	p = buf;

	a = saddr2str((const struct sockaddr *)&spidx->src);
	for (b = a; *b != '\0'; b++)
		if (*b == '[') {
			*b = '\0';
			b++;
			break;
		}
	i = snprintf(p, blen, "%s/%d[%s ", a, spidx->prefs, b);
	if (i < 0 || i >= blen)
		return NULL;
	p += i;
	blen -= i;

	a = saddr2str((const struct sockaddr *)&spidx->dst);
	for (b = a; *b != '\0'; b++)
		if (*b == '[') {
			*b = '\0';
			b++;
			break;
		}
	i = snprintf(p, blen, "%s/%d[%s ", a, spidx->prefd, b);
	if (i < 0 || i >= blen)
		return NULL;
	p += i;
	blen -= i;

	snprintf(p, blen, "proto=%s dir=%s",
		s_proto(spidx->ul_proto), s_direction(spidx->dir));

	return buf;
}
Commit	Line	Data
52b7d2ce A	1	/* $KAME: policy.c,v 1.46 2001/11/16 04:08:10 sakane Exp $ */
	2
	3	/*
	4	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. Neither the name of the project nor the names of its contributors
	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
	32	#include "config.h"
	33
	34	#include <sys/param.h>
	35	#include <sys/types.h>
	36	#include <sys/socket.h>
	37	#include <sys/queue.h>
	38
	39	#include <netinet/in.h>
	40	#ifdef HAVE_NETINET6_IPSEC
	41	# include <netinet6/ipsec.h>
	42	#else
	43	# include <netinet/ipsec.h>
	44	#endif
	45
	46	#include <stdlib.h>
	47	#include <stdio.h>
	48	#include <string.h>
	49	#include <errno.h>
	50
	51	#include "var.h"
	52	#include "misc.h"
	53	#include "vmbuf.h"
	54	#include "plog.h"
	55	#include "sockmisc.h"
	56	#include "debug.h"
	57
	58	#include "policy.h"
	59	#include "localconf.h"
	60	#include "isakmp_var.h"
	61	#include "isakmp.h"
	62	#include "oakley.h"
	63	#include "handler.h"
	64	#include "strnames.h"
65	#include "gcmalloc.h"
66	#include "session.h"
67
68	static TAILQ_HEAD(_sptree, secpolicy) sptree;
69
70	/* perform exact match against security policy table. */
71	struct secpolicy *
72	getsp(spidx)
73	struct policyindex *spidx;
74	{
75	struct secpolicy *p;
76
77	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
78	if (!cmpspidxstrict(spidx, &p->spidx))
79	return p;
80	}
81
82	return NULL;
83	}
84
85	/*
86	* perform non-exact match against security policy table, only if this is
87	* transport mode SA negotiation. for example, 0.0.0.0/0 -> 0.0.0.0/0
88	* entry in policy.txt can be returned when we're negotiating transport
89	* mode SA. this is how the kernel works.
90	*/
91	#if 1
92	struct secpolicy *
e97d2cf9	93	getsp_r(spidx, iph2)
52b7d2ce	94	struct policyindex *spidx;
65c25746	95	phase2_handle_t *iph2;
52b7d2ce A	96	{
52b7d2ce A	97	struct secpolicy *p;
e97d2cf9	98	int mismatched_outer_addr = 0;
52b7d2ce A	99
52b7d2ce A	100	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
e97d2cf9 A	101	if (!cmpspidxwild(spidx, &p->spidx)) {
	102	if (spidx->dir != IPSEC_DIR_ANY) {
	103	struct ipsecrequest *isr;
	104	for (isr = p->req; isr != NULL; isr = isr->next) {
	105	if (isr->saidx.mode != IPSEC_MODE_TUNNEL) {
65c25746	106	plog(ASL_LEVEL_DEBUG, "%s, skipping policy. dir %d, mode %d\n",
e97d2cf9 A	107	__FUNCTION__, spidx->dir, isr->saidx.mode);
	108	continue;
	109	}
	110
	111	// for tunnel mode: verify the outer ip addresses match the phase2's addresses
	112	if (spidx->dir == IPSEC_DIR_INBOUND) {
	113	// TODO: look out for wildcards
85f41bec A	114	if (!cmpsaddrwop(iph2->dst, &isr->saidx.src) &&
85f41bec A	115	!cmpsaddrwop(iph2->src, &isr->saidx.dst)) {
65c25746	116	plog(ASL_LEVEL_DEBUG, "%s, inbound policy outer addresses matched Phase 2 addresses\n",
e97d2cf9 A	117	__FUNCTION__);
	118	return p;
	119	} else {
	120	mismatched_outer_addr = 1;
	121	}
	122	} else if (spidx->dir == IPSEC_DIR_OUTBOUND) {
	123	// TODO: look out for wildcards
85f41bec A	124	if (!cmpsaddrwop(iph2->src, &isr->saidx.src) &&
85f41bec A	125	!cmpsaddrwop(iph2->dst, &isr->saidx.dst)) {
65c25746	126	plog(ASL_LEVEL_DEBUG, "%s, outbound policy outer addresses matched Phase 2 addresses\n",
e97d2cf9 A	127	__FUNCTION__);
	128	return p;
	129	} else {
	130	mismatched_outer_addr = 1;
	131	}
	132	} else {
	133	mismatched_outer_addr = 1;
	134	}
	135	if (mismatched_outer_addr) {
65c25746	136	plog(ASL_LEVEL_DEBUG, "%s, policy outer addresses matched Phase 2 addresses: dir %d\n",
e97d2cf9	137	__FUNCTION__, spidx->dir);
65c25746	138	plog(ASL_LEVEL_DEBUG, "src1: %s\n",
85f41bec	139	saddr2str((struct sockaddr *)iph2->src));
65c25746	140	plog(ASL_LEVEL_DEBUG, "src2: %s\n",
e97d2cf9	141	saddr2str((struct sockaddr *)&isr->saidx.src));
65c25746	142	plog(ASL_LEVEL_DEBUG, "dst1: %s\n",
85f41bec	143	saddr2str((struct sockaddr *)iph2->dst));
65c25746	144	plog(ASL_LEVEL_DEBUG, "dst2: %s\n",
e97d2cf9 A	145	saddr2str((struct sockaddr *)&isr->saidx.dst));
	146	}
	147	}
	148	}
	149	if (!mismatched_outer_addr) {
	150	return p;
	151	}
	152	}
52b7d2ce A	153	}
	154
	155	return NULL;
	156	}
	157	#else
	158	struct secpolicy *
	159	getsp_r(spidx, iph2)
	160	struct policyindex *spidx;
65c25746	161	phase2_handle_t *iph2;
52b7d2ce A	162	{
	163	struct secpolicy *p;
	164	u_int8_t prefixlen;
	165
65c25746	166	plog(ASL_LEVEL_DEBUG, "checking for transport mode\n");
52b7d2ce A	167
52b7d2ce A	168	if (spidx->src.ss_family != spidx->dst.ss_family) {
65c25746	169	plog(ASL_LEVEL_ERR,
52b7d2ce A	170	"address family mismatch, src:%d dst:%d\n",
	171	spidx->src.ss_family,
	172	spidx->dst.ss_family);
	173	return NULL;
	174	}
	175	switch (spidx->src.ss_family) {
	176	case AF_INET:
	177	prefixlen = sizeof(struct in_addr) << 3;
	178	break;
	179	#ifdef INET6
	180	case AF_INET6:
	181	prefixlen = sizeof(struct in6_addr) << 3;
	182	break;
	183	#endif
	184	default:
65c25746	185	plog(ASL_LEVEL_ERR,
52b7d2ce A	186	"invalid family: %d\n", spidx->src.ss_family);
	187	return NULL;
	188	}
	189
	190	/* is it transport mode SA negotiation? */
65c25746	191	plog(ASL_LEVEL_DEBUG, "src1: %s\n",
52b7d2ce	192	saddr2str(iph2->src));
65c25746	193	plog(ASL_LEVEL_DEBUG, "src2: %s\n",
85f41bec A	194	saddr2str(&spidx->src));
85f41bec A	195	if (cmpsaddrwop(iph2->src, &spidx->src)
52b7d2ce A	196	\|\| spidx->prefs != prefixlen)
	197	return NULL;
	198
65c25746	199	plog(ASL_LEVEL_DEBUG, "dst1: %s\n",
52b7d2ce	200	saddr2str(iph2->dst));
65c25746	201	plog(ASL_LEVEL_DEBUG, "dst2: %s\n",
85f41bec A	202	saddr2str(&spidx->dst));
85f41bec A	203	if (cmpsaddrwop(iph2->dst, &spidx->dst)
52b7d2ce A	204	\|\| spidx->prefd != prefixlen)
	205	return NULL;
	206
65c25746	207	plog(ASL_LEVEL_DEBUG, "looks to be transport mode\n");
52b7d2ce A	208
	209	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
	210	if (!cmpspidx_wild(spidx, &p->spidx))
	211	return p;
	212	}
	213
	214	return NULL;
	215	}
	216	#endif
	217
	218	struct secpolicy *
	219	getspbyspid(spid)
	220	u_int32_t spid;
	221	{
	222	struct secpolicy *p;
	223
	224	for (p = TAILQ_FIRST(&sptree); p; p = TAILQ_NEXT(p, chain)) {
	225	if (p->id == spid)
	226	return p;
	227	}
	228
	229	return NULL;
	230	}
	231
	232	/*
	233	* compare policyindex.
	234	* a: subject b: db
	235	* OUT: 0: equal
	236	* 1: not equal
	237	*/
	238	int
	239	cmpspidxstrict(a, b)
	240	struct policyindex a, b;
	241	{
52b7d2ce A	242
	243	/* XXX don't check direction now, but it's to be checked carefully. */
	244	if (a->dir != b->dir
	245	\|\| a->prefs != b->prefs
	246	\|\| a->prefd != b->prefd
	247	\|\| a->ul_proto != b->ul_proto)
	248	return 1;
	249
85f41bec	250	if (cmpsaddrstrict(&a->src, &b->src))
52b7d2ce	251	return 1;
85f41bec	252	if (cmpsaddrstrict(&a->dst, &b->dst))
52b7d2ce A	253	return 1;
	254
	255	return 0;
	256	}
	257
	258	/*
	259	* compare policyindex, with wildcard address/protocol match.
	260	* a: subject b: db, can contain wildcard things.
	261	* OUT: 0: equal
	262	* 1: not equal
	263	*/
	264	int
	265	cmpspidxwild(a, b)
	266	struct policyindex a, b;
	267	{
	268	struct sockaddr_storage sa1, sa2;
	269
52b7d2ce A	270	if (!(b->dir == IPSEC_DIR_ANY \|\| a->dir == b->dir))
	271	return 1;
	272
	273	if (!(a->ul_proto == IPSEC_ULPROTO_ANY \|\|
	274	b->ul_proto == IPSEC_ULPROTO_ANY \|\|
	275	a->ul_proto == b->ul_proto))
	276	return 1;
	277
	278	if (a->src.ss_family != b->src.ss_family)
	279	return 1;
	280	if (a->dst.ss_family != b->dst.ss_family)
	281	return 1;
	282
52b7d2ce A	283	/* compare src address */
52b7d2ce A	284	if (sizeof(sa1) < a->src.ss_len \|\| sizeof(sa2) < b->src.ss_len) {
65c25746	285	plog(ASL_LEVEL_ERR,
52b7d2ce A	286	"unexpected error: "
	287	"src.ss_len:%d dst.ss_len:%d\n",
	288	a->src.ss_len, b->src.ss_len);
	289	return 1;
	290	}
85f41bec A	291	mask_sockaddr(&sa1, &a->src, b->prefs);
85f41bec A	292	mask_sockaddr(&sa2, &b->src, b->prefs);
65c25746	293	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
52b7d2ce	294	a, b->prefs, saddr2str((struct sockaddr *)&sa1));
65c25746	295	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
52b7d2ce	296	b, b->prefs, saddr2str((struct sockaddr *)&sa2));
85f41bec	297	if (cmpsaddrwild(&sa1, &sa2))
52b7d2ce A	298	return 1;
52b7d2ce A	299
52b7d2ce A	300	/* compare dst address */
52b7d2ce A	301	if (sizeof(sa1) < a->dst.ss_len \|\| sizeof(sa2) < b->dst.ss_len) {
65c25746	302	plog(ASL_LEVEL_ERR, "unexpected error\n");
52b7d2ce A	303	exit(1);
52b7d2ce A	304	}
85f41bec A	305	mask_sockaddr(&sa1, &a->dst, b->prefd);
85f41bec A	306	mask_sockaddr(&sa2, &b->dst, b->prefd);
65c25746	307	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
52b7d2ce	308	a, b->prefd, saddr2str((struct sockaddr *)&sa1));
65c25746	309	plog(ASL_LEVEL_DEBUG, "%p masked with /%d: %s\n",
52b7d2ce	310	b, b->prefd, saddr2str((struct sockaddr *)&sa2));
85f41bec	311	if (cmpsaddrwild(&sa1, &sa2))
52b7d2ce A	312	return 1;
	313
	314	return 0;
	315	}
	316
	317	struct secpolicy *
	318	newsp()
	319	{
	320	struct secpolicy *new;
	321
	322	new = racoon_calloc(1, sizeof(*new));
	323	if (new == NULL)
	324	return NULL;
	325
	326	return new;
	327	}
	328
	329	void
	330	delsp(sp)
	331	struct secpolicy *sp;
	332	{
	333	struct ipsecrequest req = NULL, next;
	334
	335	for (req = sp->req; req; req = next) {
	336	next = req->next;
	337	racoon_free(req);
	338	}
	339
	340	racoon_free(sp);
	341	}
	342
	343	void
	344	delsp_bothdir(spidx0)
	345	struct policyindex *spidx0;
	346	{
	347	struct policyindex spidx;
	348	struct secpolicy *sp;
	349	struct sockaddr_storage src, dst;
	350	u_int8_t prefs, prefd;
	351
	352	memcpy(&spidx, spidx0, sizeof(spidx));
	353	switch (spidx.dir) {
	354	case IPSEC_DIR_INBOUND:
	355	#ifdef HAVE_POLICY_FWD
	356	case IPSEC_DIR_FWD:
	357	#endif
	358	src = spidx.src;
	359	dst = spidx.dst;
	360	prefs = spidx.prefs;
	361	prefd = spidx.prefd;
	362	break;
	363	case IPSEC_DIR_OUTBOUND:
	364	src = spidx.dst;
	365	dst = spidx.src;
	366	prefs = spidx.prefd;
	367	prefd = spidx.prefs;
	368	break;
	369	default:
	370	return;
	371	}
	372
	373	spidx.src = src;
	374	spidx.dst = dst;
	375	spidx.prefs = prefs;
376	spidx.prefd = prefd;
377	spidx.dir = IPSEC_DIR_INBOUND;
378
379	sp = getsp(&spidx);
380	if (sp) {
381	remsp(sp);
382	delsp(sp);
383	}
384
385	#ifdef HAVE_POLICY_FWD
386	spidx.dir = IPSEC_DIR_FWD;
387
388	sp = getsp(&spidx);
389	if (sp) {
390	remsp(sp);
391	delsp(sp);
392	}
393	#endif
394
395	spidx.src = dst;
396	spidx.dst = src;
397	spidx.prefs = prefd;
398	spidx.prefd = prefs;
399	spidx.dir = IPSEC_DIR_OUTBOUND;
400
401	sp = getsp(&spidx);
402	if (sp) {
403	remsp(sp);
404	delsp(sp);
405	}
406	}
407
408	void
409	inssp(new)
410	struct secpolicy *new;
411	{
412	#ifdef HAVE_PFKEY_POLICY_PRIORITY
413	struct secpolicy *p;
414
415	TAILQ_FOREACH(p, &sptree, chain) {
416	if (new->spidx.priority < p->spidx.priority) {
417	TAILQ_INSERT_BEFORE(p, new, chain);
418	return;
419	}
420	}
421	if (p == NULL)
422	#endif
d1e348cf	423	TAILQ_INSERT_HEAD(&sptree, new, chain);
52b7d2ce A	424
	425	check_auto_exit();
	426	return;
	427	}
	428
	429	void
	430	remsp(sp)
	431	struct secpolicy *sp;
	432	{
	433	TAILQ_REMOVE(&sptree, sp, chain);
	434	check_auto_exit();
	435	}
	436
	437	void
	438	flushsp()
	439	{
	440	struct secpolicy p, next;
	441
	442	for (p = TAILQ_FIRST(&sptree); p; p = next) {
	443	next = TAILQ_NEXT(p, chain);
	444	remsp(p);
	445	delsp(p);
	446	}
	447	}
	448
	449	int
	450	policies_installed(void)
	451	{
	452	if (TAILQ_EMPTY(&sptree))
	453	return 0;
	454	else
	455	return 1;
	456	}
	457
	458	void
	459	initsp()
	460	{
	461	TAILQ_INIT(&sptree);
	462	}
	463
	464	struct ipsecrequest *
	465	newipsecreq()
	466	{
	467	struct ipsecrequest *new;
	468
	469	new = racoon_calloc(1, sizeof(*new));
	470	if (new == NULL)
	471	return NULL;
	472
	473	return new;
	474	}
	475
	476	const char *
	477	spidx2str(spidx)
	478	const struct policyindex *spidx;
	479	{
	480	/* addr/pref[port] addr/pref[port] ul dir act */
	481	static char buf[256];
	482	char p, a, *b;
	483	int blen, i;
	484
	485	blen = sizeof(buf) - 1;
	486	p = buf;
	487
488	a = saddr2str((const struct sockaddr *)&spidx->src);
489	for (b = a; *b != '\0'; b++)
490	if (*b == '[') {
491	*b = '\0';
492	b++;
493	break;
494	}
495	i = snprintf(p, blen, "%s/%d[%s ", a, spidx->prefs, b);
496	if (i < 0 \|\| i >= blen)
497	return NULL;
498	p += i;
499	blen -= i;
500
501	a = saddr2str((const struct sockaddr *)&spidx->dst);
502	for (b = a; *b != '\0'; b++)
503	if (*b == '[') {
504	*b = '\0';
505	b++;
506	break;
507	}
508	i = snprintf(p, blen, "%s/%d[%s ", a, spidx->prefd, b);
509	if (i < 0 \|\| i >= blen)
510	return NULL;
511	p += i;
512	blen -= i;
513
514	snprintf(p, blen, "proto=%s dir=%s",
515	s_proto(spidx->ul_proto), s_direction(spidx->dir));
516
517	return buf;
518	}