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b0d623f7 1/*
ecc0ceb4 2 * Copyright (c) 2008-2016 Apple Inc. All rights reserved.
b0d623f7
A		 3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
39236c6e 5 *
b0d623f7
A		 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.
39236c6e 14 *
b0d623f7
A		 15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
39236c6e 17 *
b0d623f7
A		 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.
39236c6e 25 *
b0d623f7
A		 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
55e303ae
A		 29/* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */
30/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
1c79356b
A		 31
32/*
33 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the project nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 */
60
61/*
62 * This code is referd to RFC 2367
63 */
64
2d21ac55 65#include <machine/endian.h>
1c79356b
A		 66#include <sys/types.h>
67#include <sys/param.h>
68#include <sys/systm.h>
69#include <sys/kernel.h>
70#include <sys/mbuf.h>
71#include <sys/domain.h>
72#include <sys/protosw.h>
73#include <sys/malloc.h>
74#include <sys/socket.h>
75#include <sys/socketvar.h>
1c79356b 76#include <sys/sysctl.h>
1c79356b
A		 77#include <sys/errno.h>
78#include <sys/proc.h>
79#include <sys/queue.h>
55e303ae 80#include <sys/syslog.h>
6d2010ae 81#include <sys/mcache.h>
1c79356b 82
91447636
A		 83#include <kern/locks.h>
84
1c79356b
A		 85#include <net/if.h>
86#include <net/route.h>
87#include <net/raw_cb.h>
88
89#include <netinet/in.h>
90#include <netinet/in_systm.h>
91#include <netinet/ip.h>
92#include <netinet/in_var.h>
93
94#if INET6
95#include <netinet/ip6.h>
96#include <netinet6/in6_var.h>
97#include <netinet6/ip6_var.h>
98#endif /* INET6 */
99
1c79356b
A		 100#include <net/pfkeyv2.h>
101#include <netkey/keydb.h>
102#include <netkey/key.h>
103#include <netkey/keysock.h>
104#include <netkey/key_debug.h>
9bccf70c
A		 105#include <stdarg.h>
106
1c79356b
A		 107
108#include <netinet6/ipsec.h>
9bccf70c
A		 109#if INET6
110#include <netinet6/ipsec6.h>
111#endif
1c79356b 112#include <netinet6/ah.h>
9bccf70c
A		 113#if INET6
114#include <netinet6/ah6.h>
115#endif
1c79356b
A		 116#if IPSEC_ESP
117#include <netinet6/esp.h>
9bccf70c
A		 118#if INET6
119#include <netinet6/esp6.h>
120#endif
1c79356b
A		 121#endif
122#include <netinet6/ipcomp.h>
9bccf70c
A		 123#if INET6
124#include <netinet6/ipcomp6.h>
125#endif
126
127
128/* randomness */
129#include <sys/random.h>
1c79356b
A		 130
131#include <net/net_osdep.h>
132
55e303ae
A		 133#define FULLMASK 0xff
134
91447636
A		 135lck_grp_t *sadb_mutex_grp;
136lck_grp_attr_t *sadb_mutex_grp_attr;
137lck_attr_t *sadb_mutex_attr;
316670eb
A		 138decl_lck_mtx_data(, sadb_mutex_data);
139lck_mtx_t *sadb_mutex = &sadb_mutex_data;
2d21ac55
A		 140
141lck_grp_t *pfkey_stat_mutex_grp;
142lck_grp_attr_t *pfkey_stat_mutex_grp_attr;
143lck_attr_t *pfkey_stat_mutex_attr;
316670eb
A		 144decl_lck_mtx_data(, pfkey_stat_mutex_data);
145lck_mtx_t *pfkey_stat_mutex = &pfkey_stat_mutex_data;
2d21ac55 146
1c79356b
A		 147/*
148 * Note on SA reference counting:
149 * - SAs that are not in DEAD state will have (total external reference + 1)
150 * following value in reference count field. they cannot be freed and are
151 * referenced from SA header.
152 * - SAs that are in DEAD state will have (total external reference)
153 * in reference count field. they are ready to be freed. reference from
154 * SA header will be removed in key_delsav(), when the reference count
155 * field hits 0 (= no external reference other than from SA header.
156 */
157
158u_int32_t key_debug_level = 0; //### our sysctl is not dynamic
39236c6e 159static int key_timehandler_running = 0;
1c79356b
A		 160static u_int key_spi_trycnt = 1000;
161static u_int32_t key_spi_minval = 0x100;
162static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
163static u_int32_t policy_id = 0;
164static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
165static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
166static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
167static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
55e303ae 168static int key_preferred_oldsa = 0; /* preferred old sa rather than new sa.*/
b0d623f7 169__private_extern__ int natt_keepalive_interval = 20; /* interval between natt keepalives.*/
316670eb 170__private_extern__ int ipsec_policy_count = 0;
2d21ac55 171static int ipsec_sav_count = 0;
1c79356b
A		 172
173static u_int32_t acq_seq = 0;
174static int key_tick_init_random = 0;
39037602
A		 175static u_int64_t up_time = 0;
176__private_extern__ u_int64_t natt_now = 0;
1c79356b
A		 177
178static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
179static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
180static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
39236c6e
A		 181/* registed list */
182
91447636
A		 183#define SPIHASHSIZE 128
184#define SPIHASH(x) (((x) ^ ((x) >> 16)) % SPIHASHSIZE)
185static LIST_HEAD(_spihash, secasvar) spihash[SPIHASHSIZE];
186
1c79356b
A		 187#ifndef IPSEC_NONBLOCK_ACQUIRE
188static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
189#endif
190static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
191
192struct key_cb key_cb;
193
194/* search order for SAs */
55e303ae 195static const u_int saorder_state_valid_prefer_old[] = {
1c79356b 196 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
1c79356b 197};
55e303ae
A		 198static const u_int saorder_state_valid_prefer_new[] = {
199 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
200};
201static const u_int saorder_state_alive[] = {
1c79356b
A		 202 /* except DEAD */
203 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
204};
55e303ae 205static const u_int saorder_state_any[] = {
1c79356b
A		 206 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
207 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
208};
209
9bccf70c
A		 210static const int minsize[] = {
211 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
212 sizeof(struct sadb_sa), /* SADB_EXT_SA */
213 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
214 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
215 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
216 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
217 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
218 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
219 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
220 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
221 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
222 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
223 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
224 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
225 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
226 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
227 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
228 0, /* SADB_X_EXT_KMPRIVATE */
229 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
230 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
b0d623f7
A		 231 sizeof(struct sadb_session_id), /* SADB_EXT_SESSION_ID */
232 sizeof(struct sadb_sastat), /* SADB_EXT_SASTAT */
39236c6e
A		 233 sizeof(struct sadb_x_ipsecif), /* SADB_X_EXT_IPSECIF */
234 sizeof(struct sadb_address), /* SADB_X_EXT_ADDR_RANGE_SRC_START */
235 sizeof(struct sadb_address), /* SADB_X_EXT_ADDR_RANGE_SRC_END */
236 sizeof(struct sadb_address), /* SADB_X_EXT_ADDR_RANGE_DST_START */
237 sizeof(struct sadb_address), /* SADB_X_EXT_ADDR_RANGE_DST_END */
3e170ce0
A		 238 sizeof(struct sadb_address), /* SADB_EXT_MIGRATE_ADDRESS_SRC */
239 sizeof(struct sadb_address), /* SADB_EXT_MIGRATE_ADDRESS_DST */
240 sizeof(struct sadb_x_ipsecif), /* SADB_X_EXT_MIGRATE_IPSECIF */
9bccf70c
A		 241};
242static const int maxsize[] = {
243 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
55e303ae 244 sizeof(struct sadb_sa_2), /* SADB_EXT_SA */
9bccf70c
A		 245 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
246 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
247 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
248 0, /* SADB_EXT_ADDRESS_SRC */
249 0, /* SADB_EXT_ADDRESS_DST */
250 0, /* SADB_EXT_ADDRESS_PROXY */
251 0, /* SADB_EXT_KEY_AUTH */
252 0, /* SADB_EXT_KEY_ENCRYPT */
253 0, /* SADB_EXT_IDENTITY_SRC */
254 0, /* SADB_EXT_IDENTITY_DST */
255 0, /* SADB_EXT_SENSITIVITY */
256 0, /* SADB_EXT_PROPOSAL */
257 0, /* SADB_EXT_SUPPORTED_AUTH */
258 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
259 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
260 0, /* SADB_X_EXT_KMPRIVATE */
261 0, /* SADB_X_EXT_POLICY */
262 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
b0d623f7
A		 263 0, /* SADB_EXT_SESSION_ID */
264 0, /* SADB_EXT_SASTAT */
39236c6e
A		 265 sizeof(struct sadb_x_ipsecif), /* SADB_X_EXT_IPSECIF */
266 0, /* SADB_X_EXT_ADDR_RANGE_SRC_START */
267 0, /* SADB_X_EXT_ADDR_RANGE_SRC_END */
268 0, /* SADB_X_EXT_ADDR_RANGE_DST_START */
269 0, /* SADB_X_EXT_ADDR_RANGE_DST_END */
3e170ce0
A		 270 0, /* SADB_EXT_MIGRATE_ADDRESS_SRC */
271 0, /* SADB_EXT_MIGRATE_ADDRESS_DST */
272 sizeof(struct sadb_x_ipsecif), /* SADB_X_EXT_MIGRATE_IPSECIF */
9bccf70c
A		 273};
274
275static int ipsec_esp_keymin = 256;
276static int ipsec_esp_auth = 0;
277static int ipsec_ah_keymin = 128;
278
1c79356b 279SYSCTL_DECL(_net_key);
6d2010ae
A		 280/* Thread safe: no accumulated state */
281SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 282 &key_debug_level, 0, "");
9bccf70c 283
1c79356b
A		 284
285/* max count of trial for the decision of spi value */
6d2010ae 286SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 287 &key_spi_trycnt, 0, "");
1c79356b
A		 288
289/* minimum spi value to allocate automatically. */
6d2010ae 290SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 291 &key_spi_minval, 0, "");
1c79356b
A		 292
293/* maximun spi value to allocate automatically. */
6d2010ae 294SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 295 &key_spi_maxval, 0, "");
1c79356b
A		 296
297/* interval to initialize randseed */
6d2010ae 298SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 299 &key_int_random, 0, "");
1c79356b 300
6d2010ae
A		 301/* lifetime for larval SA; thread safe due to > compare */
302SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 303 &key_larval_lifetime, 0, "");
1c79356b
A		 304
305/* counter for blocking to send SADB_ACQUIRE to IKEd */
6d2010ae 306SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 307 &key_blockacq_count, 0, "");
1c79356b 308
6d2010ae
A		 309/* lifetime for blocking to send SADB_ACQUIRE to IKEd: Thread safe, > compare */
310SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 311 &key_blockacq_lifetime, 0, "");
1c79356b 312
55e303ae 313/* ESP auth */
6d2010ae 314SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 315 &ipsec_esp_auth, 0, "");
55e303ae 316
9bccf70c 317/* minimum ESP key length */
6d2010ae 318SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 319 &ipsec_esp_keymin, 0, "");
9bccf70c
A		 320
321/* minimum AH key length */
6d2010ae 322SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW | CTLFLAG_LOCKED, \
39236c6e 323 &ipsec_ah_keymin, 0, "");
1c79356b 324
55e303ae 325/* perfered old SA rather than new SA */
6d2010ae 326SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW | CTLFLAG_LOCKED,\
39236c6e 327 &key_preferred_oldsa, 0, "");
55e303ae
A		 328
329/* time between NATT keepalives in seconds, 0 disabled */
6d2010ae 330SYSCTL_INT(_net_key, KEYCTL_NATT_KEEPALIVE_INTERVAL, natt_keepalive_interval, CTLFLAG_RW | CTLFLAG_LOCKED,\
39236c6e 331 &natt_keepalive_interval, 0, "");
55e303ae 332
91447636 333/* PF_KEY statistics */
6d2010ae 334SYSCTL_STRUCT(_net_key, KEYCTL_PFKEYSTAT, pfkeystat, CTLFLAG_RD | CTLFLAG_LOCKED,\
39236c6e 335 &pfkeystat, pfkeystat, "");
91447636 336
1c79356b
A		 337#ifndef LIST_FOREACH
338#define LIST_FOREACH(elm, head, field) \
39236c6e 339for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
1c79356b
A		 340#endif
341#define __LIST_CHAINED(elm) \
39236c6e 342(!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
1c79356b
A		 343#define LIST_INSERT_TAIL(head, elm, type, field) \
344do {\
39236c6e
A		 345struct type *curelm = LIST_FIRST(head); \
346if (curelm == NULL) {\
347LIST_INSERT_HEAD(head, elm, field); \
348} else { \
349while (LIST_NEXT(curelm, field)) \
350curelm = LIST_NEXT(curelm, field);\
351LIST_INSERT_AFTER(curelm, elm, field);\
352}\
1c79356b
A		 353} while (0)
354
355#define KEY_CHKSASTATE(head, sav, name) \
356do { \
39236c6e
A		 357if ((head) != (sav)) { \
358ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
359(name), (head), (sav))); \
360continue; \
361} \
1c79356b
A		 362} while (0)
363
364#define KEY_CHKSPDIR(head, sp, name) \
365do { \
39236c6e
A		 366if ((head) != (sp)) { \
367ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
368"anyway continue.\n", \
369(name), (head), (sp))); \
370} \
1c79356b
A		 371} while (0)
372
373#if 1
2d21ac55 374#define KMALLOC_WAIT(p, t, n) \
39236c6e 375((p) = (t) _MALLOC((u_int32_t)(n), M_SECA, M_WAITOK))
2d21ac55 376#define KMALLOC_NOWAIT(p, t, n) \
39236c6e 377((p) = (t) _MALLOC((u_int32_t)(n), M_SECA, M_NOWAIT))
1c79356b 378#define KFREE(p) \
39236c6e 379_FREE((caddr_t)(p), M_SECA);
1c79356b 380#else
2d21ac55 381#define KMALLOC_WAIT(p, t, n) \
1c79356b 382do { \
39236c6e
A		 383((p) = (t)_MALLOC((u_int32_t)(n), M_SECA, M_WAITOK)); \
384printf("%s %d: %p <- KMALLOC_WAIT(%s, %d)\n", \
385__FILE__, __LINE__, (p), #t, n); \
1c79356b 386} while (0)
2d21ac55 387#define KMALLOC_NOWAIT(p, t, n) \
39236c6e
A		 388do { \
389((p) = (t)_MALLOC((u_int32_t)(n), M_SECA, M_NOWAIT)); \
390printf("%s %d: %p <- KMALLOC_NOWAIT(%s, %d)\n", \
391__FILE__, __LINE__, (p), #t, n); \
392} while (0)
1c79356b
A		 393
394#define KFREE(p) \
39236c6e
A		 395do { \
396printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
397_FREE((caddr_t)(p), M_SECA); \
398} while (0)
1c79356b
A		 399#endif
400
401/*
402 * set parameters into secpolicyindex buffer.
403 * Must allocate secpolicyindex buffer passed to this function.
404 */
39236c6e 405#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, ifp, s_s, s_e, d_s, d_e, idx) \
1c79356b 406do { \
39236c6e
A		 407bzero((idx), sizeof(struct secpolicyindex)); \
408(idx)->dir = (_dir); \
409(idx)->prefs = (ps); \
410(idx)->prefd = (pd); \
411(idx)->ul_proto = (ulp); \
412(idx)->internal_if = (ifp); \
413if (s) bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
414if (d) bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
415if (s_s) bcopy((s_s), &(idx)->src_range.start, ((struct sockaddr *)(s_s))->sa_len); \
416if (s_e) bcopy((s_e), &(idx)->src_range.end, ((struct sockaddr *)(s_e))->sa_len); \
417if (d_s) bcopy((d_s), &(idx)->dst_range.start, ((struct sockaddr *)(d_s))->sa_len); \
418if (d_e) bcopy((d_e), &(idx)->dst_range.end, ((struct sockaddr *)(d_e))->sa_len); \
1c79356b
A		 419} while (0)
420
421/*
422 * set parameters into secasindex buffer.
423 * Must allocate secasindex buffer before calling this function.
424 */
fe8ab488 425#define KEY_SETSECASIDX(p, m, r, s, d, ifi, idx) \
1c79356b 426do { \
39236c6e
A		 427bzero((idx), sizeof(struct secasindex)); \
428(idx)->proto = (p); \
429(idx)->mode = (m); \
430(idx)->reqid = (r); \
431bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
432bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
fe8ab488 433(idx)->ipsec_ifindex = (ifi); \
1c79356b
A		 434} while (0)
435
436/* key statistics */
437struct _keystat {
b0d623f7 438 u_int32_t getspi_count; /* the avarage of count to try to get new SPI */
1c79356b
A		 439} keystat;
440
9bccf70c
A		 441struct sadb_msghdr {
442 struct sadb_msg *msg;
443 struct sadb_ext *ext[SADB_EXT_MAX + 1];
444 int extoff[SADB_EXT_MAX + 1];
445 int extlen[SADB_EXT_MAX + 1];
446};
447
39236c6e 448static struct secpolicy *__key_getspbyid(u_int32_t id);
2d21ac55
A		 449static struct secasvar *key_do_allocsa_policy(struct secashead *, u_int, u_int16_t);
450static int key_do_get_translated_port(struct secashead *, struct secasvar *, u_int);
91447636
A		 451static void key_delsp(struct secpolicy *);
452static struct secpolicy *key_getsp(struct secpolicyindex *);
91447636
A		 453static u_int32_t key_newreqid(void);
454static struct mbuf *key_gather_mbuf(struct mbuf *,
39236c6e 455 const struct sadb_msghdr *, int, int, int *);
91447636 456static int key_spdadd(struct socket *, struct mbuf *,
39236c6e 457 const struct sadb_msghdr *);
91447636
A		 458static u_int32_t key_getnewspid(void);
459static int key_spddelete(struct socket *, struct mbuf *,
39236c6e 460 const struct sadb_msghdr *);
91447636 461static int key_spddelete2(struct socket *, struct mbuf *,
39236c6e
A		 462 const struct sadb_msghdr *);
463static int key_spdenable(struct socket *, struct mbuf *,
464 const struct sadb_msghdr *);
465static int key_spddisable(struct socket *, struct mbuf *,
466 const struct sadb_msghdr *);
91447636 467static int key_spdget(struct socket *, struct mbuf *,
39236c6e 468 const struct sadb_msghdr *);
91447636 469static int key_spdflush(struct socket *, struct mbuf *,
39236c6e 470 const struct sadb_msghdr *);
91447636 471static int key_spddump(struct socket *, struct mbuf *,
39236c6e 472 const struct sadb_msghdr *);
91447636 473static struct mbuf *key_setdumpsp(struct secpolicy *,
39236c6e 474 u_int8_t, u_int32_t, u_int32_t);
91447636
A		 475static u_int key_getspreqmsglen(struct secpolicy *);
476static int key_spdexpire(struct secpolicy *);
fe8ab488 477static struct secashead *key_newsah(struct secasindex *, ifnet_t, u_int, u_int8_t);
91447636 478static struct secasvar *key_newsav(struct mbuf *,
fe8ab488
A		 479 const struct sadb_msghdr *, struct secashead *, int *,
480 struct socket *);
91447636
A		 481static struct secashead *key_getsah(struct secasindex *);
482static struct secasvar *key_checkspidup(struct secasindex *, u_int32_t);
483static void key_setspi __P((struct secasvar *, u_int32_t));
484static struct secasvar *key_getsavbyspi(struct secashead *, u_int32_t);
485static int key_setsaval(struct secasvar *, struct mbuf *,
39236c6e 486 const struct sadb_msghdr *);
91447636
A		 487static int key_mature(struct secasvar *);
488static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t,
39236c6e 489 u_int8_t, u_int32_t, u_int32_t);
91447636 490static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t,
39236c6e 491 u_int32_t, pid_t, u_int16_t);
91447636
A		 492static struct mbuf *key_setsadbsa(struct secasvar *);
493static struct mbuf *key_setsadbaddr(u_int16_t,
39236c6e
A		 494 struct sockaddr *, u_int8_t, u_int16_t);
495static struct mbuf *key_setsadbipsecif(ifnet_t, ifnet_t, ifnet_t, int);
1c79356b 496#if 0
91447636 497static struct mbuf *key_setsadbident(u_int16_t, u_int16_t, caddr_t,
39236c6e 498 int, u_int64_t);
9bccf70c 499#endif
fe8ab488 500static struct mbuf *key_setsadbxsa2(u_int8_t, u_int32_t, u_int32_t, u_int16_t);
91447636 501static struct mbuf *key_setsadbxpolicy(u_int16_t, u_int8_t,
39236c6e 502 u_int32_t);
91447636 503static void *key_newbuf(const void *, u_int);
9bccf70c 504#if INET6
91447636 505static int key_ismyaddr6(struct sockaddr_in6 *);
1c79356b 506#endif
b0d623f7 507static void key_update_natt_keepalive_timestamp(struct secasvar *, struct secasvar *);
55e303ae
A		 508
509/* flags for key_cmpsaidx() */
2d21ac55
A		 510#define CMP_HEAD 0x1 /* protocol, addresses. */
511#define CMP_PORT 0x2 /* additionally HEAD, reqid, mode. */
512#define CMP_REQID 0x4 /* additionally HEAD, reqid. */
513#define CMP_MODE 0x8 /* additionally mode. */
514#define CMP_EXACTLY 0xF /* all elements. */
91447636
A		 515static int key_cmpsaidx(struct secasindex *, struct secasindex *, int);
516
517static int key_cmpspidx_exactly(struct secpolicyindex *,
39236c6e 518 struct secpolicyindex *);
91447636 519static int key_cmpspidx_withmask(struct secpolicyindex *,
39236c6e 520 struct secpolicyindex *);
91447636 521static int key_sockaddrcmp(struct sockaddr *, struct sockaddr *, int);
39236c6e 522static int key_is_addr_in_range(struct sockaddr_storage *, struct secpolicyaddrrange *);
91447636
A		 523static int key_bbcmp(caddr_t, caddr_t, u_int);
524static void key_srandom(void);
525static u_int16_t key_satype2proto(u_int8_t);
526static u_int8_t key_proto2satype(u_int16_t);
527
528static int key_getspi(struct socket *, struct mbuf *,
39236c6e 529 const struct sadb_msghdr *);
91447636
A		 530static u_int32_t key_do_getnewspi(struct sadb_spirange *, struct secasindex *);
531static int key_update(struct socket *, struct mbuf *,
39236c6e 532 const struct sadb_msghdr *);
9bccf70c 533#if IPSEC_DOSEQCHECK
91447636 534static struct secasvar *key_getsavbyseq(struct secashead *, u_int32_t);
9bccf70c 535#endif
91447636
A		 536static int key_add(struct socket *, struct mbuf *, const struct sadb_msghdr *);
537static int key_setident(struct secashead *, struct mbuf *,
39236c6e 538 const struct sadb_msghdr *);
91447636
A		 539static struct mbuf *key_getmsgbuf_x1(struct mbuf *, const struct sadb_msghdr *);
540static int key_delete(struct socket *, struct mbuf *,
39236c6e 541 const struct sadb_msghdr *);
91447636
A		 542static int key_get(struct socket *, struct mbuf *, const struct sadb_msghdr *);
543
544static void key_getcomb_setlifetime(struct sadb_comb *);
9bccf70c 545#if IPSEC_ESP
91447636 546static struct mbuf *key_getcomb_esp(void);
9bccf70c 547#endif
91447636
A		 548static struct mbuf *key_getcomb_ah(void);
549static struct mbuf *key_getcomb_ipcomp(void);
550static struct mbuf *key_getprop(const struct secasindex *);
9bccf70c 551
91447636 552static int key_acquire(struct secasindex *, struct secpolicy *);
9bccf70c 553#ifndef IPSEC_NONBLOCK_ACQUIRE
91447636
A		 554static struct secacq *key_newacq(struct secasindex *);
555static struct secacq *key_getacq(struct secasindex *);
556static struct secacq *key_getacqbyseq(u_int32_t);
9bccf70c 557#endif
91447636
A		 558static struct secspacq *key_newspacq(struct secpolicyindex *);
559static struct secspacq *key_getspacq(struct secpolicyindex *);
560static int key_acquire2(struct socket *, struct mbuf *,
39236c6e 561 const struct sadb_msghdr *);
91447636 562static int key_register(struct socket *, struct mbuf *,
39236c6e 563 const struct sadb_msghdr *);
91447636
A		 564static int key_expire(struct secasvar *);
565static int key_flush(struct socket *, struct mbuf *,
39236c6e 566 const struct sadb_msghdr *);
91447636
A		 567static int key_dump(struct socket *, struct mbuf *, const struct sadb_msghdr *);
568static int key_promisc(struct socket *, struct mbuf *,
39236c6e 569 const struct sadb_msghdr *);
91447636
A		 570static int key_senderror(struct socket *, struct mbuf *, int);
571static int key_validate_ext(const struct sadb_ext *, int);
572static int key_align(struct mbuf *, struct sadb_msghdr *);
91447636 573static struct mbuf *key_alloc_mbuf(int);
b0d623f7 574static int key_getsastat (struct socket *, struct mbuf *, const struct sadb_msghdr *);
3e170ce0 575static int key_migrate (struct socket *, struct mbuf *, const struct sadb_msghdr *);
316670eb 576static int key_setsaval2(struct secasvar *sav,
39236c6e
A		 577 u_int8_t satype,
578 u_int8_t alg_auth,
579 u_int8_t alg_enc,
580 u_int32_t flags,
581 u_int8_t replay,
582 struct sadb_key *key_auth,
583 u_int16_t key_auth_len,
584 struct sadb_key *key_enc,
585 u_int16_t key_enc_len,
586 u_int16_t natt_port,
587 u_int32_t seq,
588 u_int32_t spi,
589 u_int32_t pid,
590 struct sadb_lifetime *lifetime_hard,
591 struct sadb_lifetime *lifetime_soft);
ecc0ceb4 592static void bzero_keys(const struct sadb_msghdr *);
9bccf70c
A		 593
594extern int ipsec_bypass;
b0d623f7
A		 595extern int esp_udp_encap_port;
596int ipsec_send_natt_keepalive(struct secasvar *sav);
3e170ce0 597bool ipsec_fill_offload_frame(ifnet_t ifp, struct secasvar *sav, struct ifnet_keepalive_offload_frame *frame, size_t frame_data_offset);
1c79356b 598
39236c6e 599void key_init(struct protosw *, struct domain *);
91447636
A		 600
601/*
602 * PF_KEY init
6d2010ae 603 * setup locks, call raw_init(), and then init timer and associated data
91447636
A		 604 *
605 */
606void
39236c6e 607key_init(struct protosw *pp, struct domain *dp)
91447636 608{
39236c6e 609 static int key_initialized = 0;
91447636 610 int i;
39236c6e
A		 611
612 VERIFY((pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED);
99c3a104
A		 613
614 _CASSERT(PFKEY_ALIGN8(sizeof(struct sadb_msg)) <= _MHLEN);
39236c6e
A		 615
616 if (key_initialized)
617 return;
618 key_initialized = 1;
99c3a104 619
91447636
A		 620 sadb_mutex_grp_attr = lck_grp_attr_alloc_init();
621 sadb_mutex_grp = lck_grp_alloc_init("sadb", sadb_mutex_grp_attr);
622 sadb_mutex_attr = lck_attr_alloc_init();
2d21ac55 623
39236c6e
A		 624 lck_mtx_init(sadb_mutex, sadb_mutex_grp, sadb_mutex_attr);
625
2d21ac55
A		 626 pfkey_stat_mutex_grp_attr = lck_grp_attr_alloc_init();
627 pfkey_stat_mutex_grp = lck_grp_alloc_init("pfkey_stat", pfkey_stat_mutex_grp_attr);
628 pfkey_stat_mutex_attr = lck_attr_alloc_init();
39236c6e 629
316670eb 630 lck_mtx_init(pfkey_stat_mutex, pfkey_stat_mutex_grp, pfkey_stat_mutex_attr);
39236c6e 631
91447636
A		 632 for (i = 0; i < SPIHASHSIZE; i++)
633 LIST_INIT(&spihash[i]);
593a1d5f 634
39236c6e
A		 635 raw_init(pp, dp);
636
637 bzero((caddr_t)&key_cb, sizeof(key_cb));
638
6d2010ae
A		 639 for (i = 0; i < IPSEC_DIR_MAX; i++) {
640 LIST_INIT(&sptree[i]);
641 }
642 ipsec_policy_count = 0;
39236c6e 643
6d2010ae 644 LIST_INIT(&sahtree);
39236c6e 645
6d2010ae
A		 646 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
647 LIST_INIT(&regtree[i]);
648 }
649 ipsec_sav_count = 0;
39236c6e 650
6d2010ae
A		 651#ifndef IPSEC_NONBLOCK_ACQUIRE
652 LIST_INIT(&acqtree);
653#endif
654 LIST_INIT(&spacqtree);
39236c6e 655
6d2010ae
A		 656 /* system default */
657#if INET
658 ip4_def_policy.policy = IPSEC_POLICY_NONE;
659 ip4_def_policy.refcnt++; /*never reclaim this*/
660#endif
661#if INET6
662 ip6_def_policy.policy = IPSEC_POLICY_NONE;
663 ip6_def_policy.refcnt++; /*never reclaim this*/
664#endif
39236c6e
A		 665
666 key_timehandler_running = 0;
667
6d2010ae
A		 668 /* initialize key statistics */
669 keystat.getspi_count = 1;
39236c6e 670
6d2010ae
A		 671#ifndef __APPLE__
672 printf("IPsec: Initialized Security Association Processing.\n");
673#endif
91447636
A		 674}
675
39236c6e
A		 676static void
677key_start_timehandler(void)
678{
679 /* must be called while locked */
680 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e
A		 681 if (key_timehandler_running == 0) {
682 key_timehandler_running = 1;
683 (void)timeout((void *)key_timehandler, (void *)0, hz);
684 }
fe8ab488
A		 685
686 /* Turn off the ipsec bypass */
687 if (ipsec_bypass != 0)
688 ipsec_bypass = 0;
39236c6e 689}
91447636 690
1c79356b
A		 691/* %%% IPsec policy management */
692/*
693 * allocating a SP for OUTBOUND or INBOUND packet.
694 * Must call key_freesp() later.
695 * OUT: NULL: not found
696 * others: found and return the pointer.
697 */
698struct secpolicy *
6d2010ae 699key_allocsp(
39236c6e
A		 700 struct secpolicyindex *spidx,
701 u_int dir)
1c79356b
A		 702{
703 struct secpolicy *sp;
9bccf70c 704 struct timeval tv;
39236c6e 705
2d21ac55 706 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
1c79356b
A		 707 /* sanity check */
708 if (spidx == NULL)
709 panic("key_allocsp: NULL pointer is passed.\n");
39236c6e 710
1c79356b
A		 711 /* check direction */
712 switch (dir) {
39236c6e
A		 713 case IPSEC_DIR_INBOUND:
714 case IPSEC_DIR_OUTBOUND:
715 break;
716 default:
717 panic("key_allocsp: Invalid direction is passed.\n");
1c79356b 718 }
39236c6e 719
1c79356b 720 /* get a SP entry */
1c79356b 721 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
39236c6e
A		 722 printf("*** objects\n");
723 kdebug_secpolicyindex(spidx));
724
2d21ac55 725 lck_mtx_lock(sadb_mutex);
1c79356b
A		 726 LIST_FOREACH(sp, &sptree[dir], chain) {
727 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
39236c6e
A		 728 printf("*** in SPD\n");
729 kdebug_secpolicyindex(&sp->spidx));
730
1c79356b
A		 731 if (sp->state == IPSEC_SPSTATE_DEAD)
732 continue;
39236c6e
A		 733
734 /* If the policy is disabled, skip */
735 if (sp->disabled > 0)
736 continue;
737
738 /* If the incoming spidx specifies bound if,
739 ignore unbound policies*/
740 if (spidx->internal_if != NULL
741 && (sp->spidx.internal_if == NULL || sp->ipsec_if == NULL))
742 continue;
743
1c79356b
A		 744 if (key_cmpspidx_withmask(&sp->spidx, spidx))
745 goto found;
746 }
2d21ac55 747 lck_mtx_unlock(sadb_mutex);
1c79356b 748 return NULL;
39236c6e 749
1c79356b 750found:
39236c6e 751
1c79356b 752 /* found a SPD entry */
9bccf70c
A		 753 microtime(&tv);
754 sp->lastused = tv.tv_sec;
1c79356b 755 sp->refcnt++;
2d21ac55
A		 756 lck_mtx_unlock(sadb_mutex);
757
758 /* sanity check */
759 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
1c79356b 760 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
39236c6e
A		 761 printf("DP key_allocsp cause refcnt++:%d SP:0x%llx\n",
762 sp->refcnt, (uint64_t)VM_KERNEL_ADDRPERM(sp)));
1c79356b
A		 763 return sp;
764}
765
766/*
9bccf70c
A		 767 * return a policy that matches this particular inbound packet.
768 * XXX slow
769 */
770struct secpolicy *
6d2010ae 771key_gettunnel(
39236c6e
A		 772 struct sockaddr *osrc,
773 struct sockaddr *odst,
774 struct sockaddr *isrc,
775 struct sockaddr *idst)
9bccf70c
A		 776{
777 struct secpolicy *sp;
778 const int dir = IPSEC_DIR_INBOUND;
779 struct timeval tv;
9bccf70c
A		 780 struct ipsecrequest *r1, *r2, *p;
781 struct sockaddr *os, *od, *is, *id;
782 struct secpolicyindex spidx;
39236c6e 783
55e303ae
A		 784 if (isrc->sa_family != idst->sa_family) {
785 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
39236c6e 786 isrc->sa_family, idst->sa_family));
55e303ae
A		 787 return NULL;
788 }
39236c6e 789
2d21ac55 790 lck_mtx_lock(sadb_mutex);
9bccf70c
A		 791 LIST_FOREACH(sp, &sptree[dir], chain) {
792 if (sp->state == IPSEC_SPSTATE_DEAD)
793 continue;
39236c6e 794
9bccf70c
A		 795 r1 = r2 = NULL;
796 for (p = sp->req; p; p = p->next) {
797 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
798 continue;
39236c6e 799
9bccf70c
A		 800 r1 = r2;
801 r2 = p;
39236c6e 802
9bccf70c
A		 803 if (!r1) {
804 /* here we look at address matches only */
805 spidx = sp->spidx;
806 if (isrc->sa_len > sizeof(spidx.src) ||
807 idst->sa_len > sizeof(spidx.dst))
808 continue;
809 bcopy(isrc, &spidx.src, isrc->sa_len);
810 bcopy(idst, &spidx.dst, idst->sa_len);
811 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
39236c6e 812 continue;
9bccf70c
A		 813 } else {
814 is = (struct sockaddr *)&r1->saidx.src;
815 id = (struct sockaddr *)&r1->saidx.dst;
816 if (key_sockaddrcmp(is, isrc, 0) ||
817 key_sockaddrcmp(id, idst, 0))
818 continue;
819 }
39236c6e 820
9bccf70c
A		 821 os = (struct sockaddr *)&r2->saidx.src;
822 od = (struct sockaddr *)&r2->saidx.dst;
823 if (key_sockaddrcmp(os, osrc, 0) ||
824 key_sockaddrcmp(od, odst, 0))
825 continue;
39236c6e 826
9bccf70c
A		 827 goto found;
828 }
829 }
2d21ac55 830 lck_mtx_unlock(sadb_mutex);
9bccf70c 831 return NULL;
39236c6e 832
9bccf70c
A		 833found:
834 microtime(&tv);
835 sp->lastused = tv.tv_sec;
836 sp->refcnt++;
2d21ac55 837 lck_mtx_unlock(sadb_mutex);
9bccf70c
A		 838 return sp;
839}
840
fe8ab488
A		 841struct secasvar *key_alloc_outbound_sav_for_interface(ifnet_t interface, int family)
842{
843 struct secashead *sah;
844 struct secasvar *sav;
845 u_int stateidx;
846 u_int state;
847 const u_int *saorder_state_valid;
848 int arraysize;
849 struct sockaddr_in *sin;
850 u_int16_t dstport;
851
852 if (interface == NULL)
853 return NULL;
854
855 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
856
857 lck_mtx_lock(sadb_mutex);
858
859 LIST_FOREACH(sah, &sahtree, chain) {
860 if (sah->ipsec_if == interface &&
3e170ce0 861 (family == AF_INET6 || family == AF_INET) &&
fe8ab488
A		 862 sah->dir == IPSEC_DIR_OUTBOUND) {
863 /* This SAH is linked to the IPSec interface, and the right family. We found it! */
864 if (key_preferred_oldsa) {
865 saorder_state_valid = saorder_state_valid_prefer_old;
866 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
867 } else {
868 saorder_state_valid = saorder_state_valid_prefer_new;
869 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
870 }
871
872 sin = (struct sockaddr_in *)&sah->saidx.dst;
873 dstport = sin->sin_port;
874 if (sah->saidx.mode == IPSEC_MODE_TRANSPORT)
875 sin->sin_port = IPSEC_PORT_ANY;
876
877 for (stateidx = 0; stateidx < arraysize; stateidx++) {
878 state = saorder_state_valid[stateidx];
879 sav = key_do_allocsa_policy(sah, state, dstport);
880 if (sav != NULL) {
881 lck_mtx_unlock(sadb_mutex);
882 return sav;
883 }
884 }
885
886 break;
887 }
888 }
889
890 lck_mtx_unlock(sadb_mutex);
891 return NULL;
892}
893
9bccf70c
A		 894/*
895 * allocating an SA entry for an *OUTBOUND* packet.
896 * checking each request entries in SP, and acquire an SA if need.
1c79356b
A		 897 * OUT: 0: there are valid requests.
898 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
899 */
900int
6d2010ae 901key_checkrequest(
39236c6e
A		 902 struct ipsecrequest *isr,
903 struct secasindex *saidx,
904 struct secasvar **sav)
1c79356b
A		 905{
906 u_int level;
907 int error;
2d21ac55 908 struct sockaddr_in *sin;
39236c6e 909
2d21ac55
A		 910 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
911
912 *sav = NULL;
913
1c79356b
A		 914 /* sanity check */
915 if (isr == NULL || saidx == NULL)
916 panic("key_checkrequest: NULL pointer is passed.\n");
39236c6e 917
1c79356b
A		 918 /* check mode */
919 switch (saidx->mode) {
39236c6e
A		 920 case IPSEC_MODE_TRANSPORT:
921 case IPSEC_MODE_TUNNEL:
922 break;
923 case IPSEC_MODE_ANY:
924 default:
925 panic("key_checkrequest: Invalid policy defined.\n");
1c79356b 926 }
39236c6e 927
1c79356b
A		 928 /* get current level */
929 level = ipsec_get_reqlevel(isr);
39236c6e
A		 930
931
1c79356b 932 /*
1c79356b
A		 933 * key_allocsa_policy should allocate the oldest SA available.
934 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
935 */
2d21ac55
A		 936 if (*sav == NULL)
937 *sav = key_allocsa_policy(saidx);
39236c6e 938
1c79356b 939 /* When there is SA. */
2d21ac55 940 if (*sav != NULL)
1c79356b 941 return 0;
39236c6e 942
2d21ac55
A		 943 /* There is no SA.
944 *
945 * Remove dst port - used for special natt support - don't call
946 * key_acquire with it.
947 */
948 if (saidx->mode == IPSEC_MODE_TRANSPORT) {
949 sin = (struct sockaddr_in *)&saidx->dst;
950 sin->sin_port = IPSEC_PORT_ANY;
951 }
1c79356b 952 if ((error = key_acquire(saidx, isr->sp)) != 0) {
55e303ae
A		 953 /* XXX What should I do ? */
954 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
39236c6e 955 "from key_acquire.\n", error));
1c79356b
A		 956 return error;
957 }
39236c6e 958
1c79356b
A		 959 return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
960}
961
962/*
963 * allocating a SA for policy entry from SAD.
964 * NOTE: searching SAD of aliving state.
965 * OUT: NULL: not found.
966 * others: found and return the pointer.
967 */
e2fac8b1
A		 968u_int32_t sah_search_calls = 0;
969u_int32_t sah_search_count = 0;
2d21ac55 970struct secasvar *
6d2010ae 971key_allocsa_policy(
39236c6e 972 struct secasindex *saidx)
1c79356b
A		 973{
974 struct secashead *sah;
975 struct secasvar *sav;
976 u_int stateidx, state;
55e303ae
A		 977 const u_int *saorder_state_valid;
978 int arraysize;
2d21ac55
A		 979 struct sockaddr_in *sin;
980 u_int16_t dstport;
981
982 lck_mtx_lock(sadb_mutex);
e2fac8b1 983 sah_search_calls++;
1c79356b 984 LIST_FOREACH(sah, &sahtree, chain) {
39236c6e 985 sah_search_count++;
1c79356b
A		 986 if (sah->state == SADB_SASTATE_DEAD)
987 continue;
2d21ac55 988 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE | CMP_REQID))
1c79356b
A		 989 goto found;
990 }
2d21ac55 991 lck_mtx_unlock(sadb_mutex);
1c79356b 992 return NULL;
39236c6e
A		 993
994found:
995
55e303ae
A		 996 /*
997 * search a valid state list for outbound packet.
998 * This search order is important.
999 */
1000 if (key_preferred_oldsa) {
1001 saorder_state_valid = saorder_state_valid_prefer_old;
1002 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
1003 } else {
1004 saorder_state_valid = saorder_state_valid_prefer_new;
1005 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
1006 }
39236c6e
A		 1007
1008
2d21ac55
A		 1009 sin = (struct sockaddr_in *)&saidx->dst;
1010 dstport = sin->sin_port;
1011 if (saidx->mode == IPSEC_MODE_TRANSPORT)
1012 sin->sin_port = IPSEC_PORT_ANY;
39236c6e 1013
55e303ae 1014 for (stateidx = 0; stateidx < arraysize; stateidx++) {
39236c6e 1015
1c79356b 1016 state = saorder_state_valid[stateidx];
39236c6e 1017
2d21ac55
A		 1018 sav = key_do_allocsa_policy(sah, state, dstport);
1019 if (sav != NULL) {
1020 lck_mtx_unlock(sadb_mutex);
1c79356b 1021 return sav;
2d21ac55 1022 }
1c79356b 1023 }
2d21ac55 1024 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 1025 return NULL;
1026}
1027
39236c6e
A		 1028static void
1029key_send_delete (struct secasvar *sav)
1030{
1031 struct mbuf *m, *result;
1032 u_int8_t satype;
1033
1034 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
1035
1036 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
1037 panic("key_do_allocsa_policy: invalid proto is passed.\n");
1038
1039 m = key_setsadbmsg(SADB_DELETE, 0,
1040 satype, 0, 0, sav->refcnt - 1);
1041 if (!m)
1042 goto msgfail;
1043 result = m;
1044
1045 /* set sadb_address for saidx's. */
1046 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
1047 (struct sockaddr *)&sav->sah->saidx.src,
1048 sav->sah->saidx.src.ss_len << 3,
1049 IPSEC_ULPROTO_ANY);
1050 if (!m)
1051 goto msgfail;
1052 m_cat(result, m);
1053
1054 /* set sadb_address for saidx's. */
1055 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
1056 (struct sockaddr *)&sav->sah->saidx.dst,
1057 sav->sah->saidx.src.ss_len << 3,
1058 IPSEC_ULPROTO_ANY);
1059 if (!m)
1060 goto msgfail;
1061 m_cat(result, m);
1062
1063 /* create SA extension */
1064 m = key_setsadbsa(sav);
1065 if (!m)
1066 goto msgfail;
1067 m_cat(result, m);
1068
1069 if (result->m_len < sizeof(struct sadb_msg)) {
1070 result = m_pullup(result,
1071 sizeof(struct sadb_msg));
1072 if (result == NULL)
1073 goto msgfail;
1074 }
1075
1076 result->m_pkthdr.len = 0;
1077 for (m = result; m; m = m->m_next)
1078 result->m_pkthdr.len += m->m_len;
1079 mtod(result, struct sadb_msg *)->sadb_msg_len =
1080 PFKEY_UNIT64(result->m_pkthdr.len);
1081
1082 if (key_sendup_mbuf(NULL, result,
1083 KEY_SENDUP_REGISTERED))
1084 goto msgfail;
1085msgfail:
1086 key_freesav(sav, KEY_SADB_LOCKED);
1087}
1088
1c79356b
A		 1089/*
1090 * searching SAD with direction, protocol, mode and state.
1091 * called by key_allocsa_policy().
1092 * OUT:
1093 * NULL : not found
1094 * others : found, pointer to a SA.
1095 */
1096static struct secasvar *
6d2010ae 1097key_do_allocsa_policy(
39236c6e
A		 1098 struct secashead *sah,
1099 u_int state,
1100 u_int16_t dstport)
1c79356b 1101{
2d21ac55 1102 struct secasvar *sav, *nextsav, *candidate, *natt_candidate, *no_natt_candidate, *d;
39236c6e 1103
91447636 1104 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 1105
2d21ac55 1106 /* initialize */
1c79356b 1107 candidate = NULL;
2d21ac55
A		 1108 natt_candidate = NULL;
1109 no_natt_candidate = NULL;
39236c6e 1110
55e303ae
A		 1111 for (sav = LIST_FIRST(&sah->savtree[state]);
1112 sav != NULL;
1113 sav = nextsav) {
39236c6e 1114
55e303ae 1115 nextsav = LIST_NEXT(sav, chain);
39236c6e 1116
1c79356b
A		 1117 /* sanity check */
1118 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
39236c6e 1119
2d21ac55
A		 1120 if (sah->saidx.mode == IPSEC_MODE_TUNNEL && dstport &&
1121 ((sav->flags & SADB_X_EXT_NATT) != 0) &&
1122 ntohs(dstport) != sav->remote_ike_port)
1c79356b 1123 continue;
39236c6e 1124
2d21ac55
A		 1125 if (sah->saidx.mode == IPSEC_MODE_TRANSPORT &&
1126 ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0) &&
1127 ntohs(dstport) != sav->remote_ike_port)
1128 continue; /* skip this one - not a match - or not UDP */
39236c6e 1129
2d21ac55
A		 1130 if ((sah->saidx.mode == IPSEC_MODE_TUNNEL &&
1131 ((sav->flags & SADB_X_EXT_NATT) != 0)) ||
1132 (sah->saidx.mode == IPSEC_MODE_TRANSPORT &&
1133 ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0))) {
39236c6e
A		 1134 if (natt_candidate == NULL) {
1135 natt_candidate = sav;
1136 continue;
1137 } else
1138 candidate = natt_candidate;
1139 } else {
1140 if (no_natt_candidate == NULL) {
1141 no_natt_candidate = sav;
1142 continue;
1143 } else
1144 candidate = no_natt_candidate;
1145 }
1146
1c79356b 1147 /* Which SA is the better ? */
39236c6e 1148
1c79356b
A		 1149 /* sanity check 2 */
1150 if (candidate->lft_c == NULL || sav->lft_c == NULL)
1151 panic("key_do_allocsa_policy: "
39236c6e
A		 1152 "lifetime_current is NULL.\n");
1153
55e303ae
A		 1154 /* What the best method is to compare ? */
1155 if (key_preferred_oldsa) {
1156 if (candidate->lft_c->sadb_lifetime_addtime >
39236c6e 1157 sav->lft_c->sadb_lifetime_addtime) {
2d21ac55
A		 1158 if ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0)
1159 natt_candidate = sav;
1160 else
1161 no_natt_candidate = sav;
39236c6e 1162 }
55e303ae
A		 1163 continue;
1164 /*NOTREACHED*/
1165 }
39236c6e 1166
55e303ae
A		 1167 /* prefered new sa rather than old sa */
1168 if (candidate->lft_c->sadb_lifetime_addtime <
39236c6e 1169 sav->lft_c->sadb_lifetime_addtime) {
55e303ae 1170 d = candidate;
2d21ac55
A		 1171 if ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0)
1172 natt_candidate = sav;
1173 else
1174 no_natt_candidate = sav;
55e303ae
A		 1175 } else
1176 d = sav;
39236c6e 1177
55e303ae
A		 1178 /*
1179 * prepared to delete the SA when there is more
1180 * suitable candidate and the lifetime of the SA is not
1181 * permanent.
1182 */
1183 if (d->lft_c->sadb_lifetime_addtime != 0) {
39236c6e 1184 key_send_delete(d);
1c79356b
A		 1185 }
1186 }
39236c6e 1187
2d21ac55
A		 1188 /* choose latest if both types present */
1189 if (natt_candidate == NULL)
1190 candidate = no_natt_candidate;
1191 else if (no_natt_candidate == NULL)
1192 candidate = natt_candidate;
1193 else if (sah->saidx.mode == IPSEC_MODE_TUNNEL && dstport)
1194 candidate = natt_candidate;
1195 else if (natt_candidate->lft_c->sadb_lifetime_addtime >
39236c6e 1196 no_natt_candidate->lft_c->sadb_lifetime_addtime)
2d21ac55
A		 1197 candidate = natt_candidate;
1198 else
1199 candidate = no_natt_candidate;
39236c6e 1200
1c79356b
A		 1201 if (candidate) {
1202 candidate->refcnt++;
1203 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
39236c6e
A		 1204 printf("DP allocsa_policy cause "
1205 "refcnt++:%d SA:0x%llx\n", candidate->refcnt,
1206 (uint64_t)VM_KERNEL_ADDRPERM(candidate)));
1c79356b
A		 1207 }
1208 return candidate;
1209}
1210
1211/*
1212 * allocating a SA entry for a *INBOUND* packet.
1213 * Must call key_freesav() later.
1214 * OUT: positive: pointer to a sav.
91447636 1215 * NULL: not found, or error occurred.
1c79356b
A		 1216 *
1217 * In the comparison, source address will be ignored for RFC2401 conformance.
1218 * To quote, from section 4.1:
1219 * A security association is uniquely identified by a triple consisting
1220 * of a Security Parameter Index (SPI), an IP Destination Address, and a
1221 * security protocol (AH or ESP) identifier.
1222 * Note that, however, we do need to keep source address in IPsec SA.
9bccf70c 1223 * IKE specification and PF_KEY specification do assume that we
1c79356b
A		 1224 * keep source address in IPsec SA. We see a tricky situation here.
1225 */
1226struct secasvar *
6d2010ae 1227key_allocsa(
39236c6e
A		 1228 u_int family,
1229 caddr_t src,
1230 caddr_t dst,
1231 u_int proto,
1232 u_int32_t spi)
1c79356b 1233{
91447636
A		 1234 struct secasvar *sav, *match;
1235 u_int stateidx, state, tmpidx, matchidx;
9bccf70c
A		 1236 struct sockaddr_in sin;
1237 struct sockaddr_in6 sin6;
55e303ae
A		 1238 const u_int *saorder_state_valid;
1239 int arraysize;
2d21ac55
A		 1240
1241 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
39236c6e 1242
1c79356b
A		 1243 /* sanity check */
1244 if (src == NULL || dst == NULL)
1245 panic("key_allocsa: NULL pointer is passed.\n");
39236c6e 1246
55e303ae
A		 1247 /*
1248 * when both systems employ similar strategy to use a SA.
1249 * the search order is important even in the inbound case.
1250 */
1251 if (key_preferred_oldsa) {
1252 saorder_state_valid = saorder_state_valid_prefer_old;
1253 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
1254 } else {
1255 saorder_state_valid = saorder_state_valid_prefer_new;
1256 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
1257 }
39236c6e 1258
1c79356b
A		 1259 /*
1260 * searching SAD.
1261 * XXX: to be checked internal IP header somewhere. Also when
1262 * IPsec tunnel packet is received. But ESP tunnel mode is
1263 * encrypted so we can't check internal IP header.
1264 */
91447636
A		 1265 /*
1266 * search a valid state list for inbound packet.
1267 * the search order is not important.
1268 */
1269 match = NULL;
1270 matchidx = arraysize;
2d21ac55 1271 lck_mtx_lock(sadb_mutex);
91447636
A		 1272 LIST_FOREACH(sav, &spihash[SPIHASH(spi)], spihash) {
1273 if (sav->spi != spi)
1274 continue;
1275 if (proto != sav->sah->saidx.proto)
1276 continue;
1277 if (family != sav->sah->saidx.src.ss_family ||
1278 family != sav->sah->saidx.dst.ss_family)
1279 continue;
1280 tmpidx = arraysize;
1281 for (stateidx = 0; stateidx < matchidx; stateidx++) {
1c79356b 1282 state = saorder_state_valid[stateidx];
91447636
A		 1283 if (sav->state == state) {
1284 tmpidx = stateidx;
1285 break;
1286 }
1287 }
1288 if (tmpidx >= matchidx)
1289 continue;
39236c6e 1290
1c79356b 1291#if 0 /* don't check src */
91447636
A		 1292 /* check src address */
1293 switch (family) {
39236c6e
A		 1294 case AF_INET:
1295 bzero(&sin, sizeof(sin));
1296 sin.sin_family = AF_INET;
1297 sin.sin_len = sizeof(sin);
1298 bcopy(src, &sin.sin_addr,
1299 sizeof(sin.sin_addr));
1300 if (key_sockaddrcmp((struct sockaddr*)&sin,
1301 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
1302 continue;
1303 break;
1304 case AF_INET6:
1305 bzero(&sin6, sizeof(sin6));
1306 sin6.sin6_family = AF_INET6;
1307 sin6.sin6_len = sizeof(sin6);
1308 bcopy(src, &sin6.sin6_addr,
1309 sizeof(sin6.sin6_addr));
1310 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1311 /* kame fake scopeid */
1312 sin6.sin6_scope_id =
1313 ntohs(sin6.sin6_addr.s6_addr16[1]);
1314 sin6.sin6_addr.s6_addr16[1] = 0;
1315 }
1316 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1317 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
1318 continue;
1319 break;
1320 default:
1321 ipseclog((LOG_DEBUG, "key_allocsa: "
1322 "unknown address family=%d.\n",
1323 family));
91447636 1324 continue;
91447636 1325 }
39236c6e 1326
1c79356b 1327#endif
91447636
A		 1328 /* check dst address */
1329 switch (family) {
39236c6e
A		 1330 case AF_INET:
1331 bzero(&sin, sizeof(sin));
1332 sin.sin_family = AF_INET;
1333 sin.sin_len = sizeof(sin);
1334 bcopy(dst, &sin.sin_addr,
1335 sizeof(sin.sin_addr));
1336 if (key_sockaddrcmp((struct sockaddr*)&sin,
1337 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1338 continue;
1339
1340 break;
1341 case AF_INET6:
1342 bzero(&sin6, sizeof(sin6));
1343 sin6.sin6_family = AF_INET6;
1344 sin6.sin6_len = sizeof(sin6);
1345 bcopy(dst, &sin6.sin6_addr,
1346 sizeof(sin6.sin6_addr));
1347 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1348 /* kame fake scopeid */
1349 sin6.sin6_scope_id =
1350 ntohs(sin6.sin6_addr.s6_addr16[1]);
1351 sin6.sin6_addr.s6_addr16[1] = 0;
1352 }
1353 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1354 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1355 continue;
1356 break;
1357 default:
1358 ipseclog((LOG_DEBUG, "key_allocsa: "
1359 "unknown address family=%d.\n", family));
91447636 1360 continue;
1c79356b 1361 }
39236c6e 1362
91447636
A		 1363 match = sav;
1364 matchidx = tmpidx;
1c79356b 1365 }
91447636
A		 1366 if (match)
1367 goto found;
39236c6e 1368
1c79356b 1369 /* not found */
2d21ac55 1370 lck_mtx_unlock(sadb_mutex);
1c79356b 1371 return NULL;
39236c6e 1372
1c79356b 1373found:
2d21ac55
A		 1374 match->refcnt++;
1375 lck_mtx_unlock(sadb_mutex);
1c79356b 1376 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
39236c6e
A		 1377 printf("DP allocsa cause refcnt++:%d SA:0x%llx\n",
1378 match->refcnt, (uint64_t)VM_KERNEL_ADDRPERM(match)));
91447636 1379 return match;
1c79356b
A		 1380}
1381
2d21ac55 1382u_int16_t
6d2010ae 1383key_natt_get_translated_port(
39236c6e 1384 struct secasvar *outsav)
2d21ac55 1385{
39236c6e 1386
2d21ac55
A		 1387 struct secasindex saidx;
1388 struct secashead *sah;
1389 u_int stateidx, state;
1390 const u_int *saorder_state_valid;
1391 int arraysize;
1392
1393 /* get sa for incoming */
1394 saidx.mode = outsav->sah->saidx.mode;
1395 saidx.reqid = 0;
1396 saidx.proto = outsav->sah->saidx.proto;
1397 bcopy(&outsav->sah->saidx.src, &saidx.dst, sizeof(struct sockaddr_in));
1398 bcopy(&outsav->sah->saidx.dst, &saidx.src, sizeof(struct sockaddr_in));
1399
1400 lck_mtx_lock(sadb_mutex);
1401 LIST_FOREACH(sah, &sahtree, chain) {
1402 if (sah->state == SADB_SASTATE_DEAD)
1403 continue;
1404 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE))
1405 goto found;
1406 }
1407 lck_mtx_unlock(sadb_mutex);
1408 return 0;
39236c6e 1409
2d21ac55 1410found:
39236c6e 1411 /*
2d21ac55
A		 1412 * Found sah - now go thru list of SAs and find
1413 * matching remote ike port. If found - set
1414 * sav->natt_encapsulated_src_port and return the port.
1415 */
1416 /*
1417 * search a valid state list for outbound packet.
1418 * This search order is important.
1419 */
1420 if (key_preferred_oldsa) {
1421 saorder_state_valid = saorder_state_valid_prefer_old;
1422 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
1423 } else {
1424 saorder_state_valid = saorder_state_valid_prefer_new;
1425 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
1426 }
39236c6e 1427
2d21ac55
A		 1428 for (stateidx = 0; stateidx < arraysize; stateidx++) {
1429 state = saorder_state_valid[stateidx];
1430 if (key_do_get_translated_port(sah, outsav, state)) {
1431 lck_mtx_unlock(sadb_mutex);
1432 return outsav->natt_encapsulated_src_port;
1433 }
1434 }
1435 lck_mtx_unlock(sadb_mutex);
1436 return 0;
1437}
1438
1439static int
6d2010ae 1440key_do_get_translated_port(
39236c6e
A		 1441 struct secashead *sah,
1442 struct secasvar *outsav,
1443 u_int state)
2d21ac55
A		 1444{
1445 struct secasvar *currsav, *nextsav, *candidate;
39236c6e
A		 1446
1447
2d21ac55
A		 1448 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
1449
1450 /* initilize */
1451 candidate = NULL;
39236c6e 1452
2d21ac55
A		 1453 for (currsav = LIST_FIRST(&sah->savtree[state]);
1454 currsav != NULL;
1455 currsav = nextsav) {
39236c6e 1456
2d21ac55 1457 nextsav = LIST_NEXT(currsav, chain);
39236c6e 1458
2d21ac55
A		 1459 /* sanity check */
1460 KEY_CHKSASTATE(currsav->state, state, "key_do_get_translated_port");
1461
1462 if ((currsav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) == 0 ||
1463 currsav->remote_ike_port != outsav->remote_ike_port)
1464 continue;
39236c6e 1465
2d21ac55
A		 1466 if (candidate == NULL) {
1467 candidate = currsav;
1468 continue;
1469 }
1470
1471 /* Which SA is the better ? */
39236c6e 1472
2d21ac55
A		 1473 /* sanity check 2 */
1474 if (candidate->lft_c == NULL || currsav->lft_c == NULL)
1475 panic("key_do_get_translated_port: "
39236c6e
A		 1476 "lifetime_current is NULL.\n");
1477
2d21ac55
A		 1478 /* What the best method is to compare ? */
1479 if (key_preferred_oldsa) {
1480 if (candidate->lft_c->sadb_lifetime_addtime >
39236c6e 1481 currsav->lft_c->sadb_lifetime_addtime) {
2d21ac55
A		 1482 candidate = currsav;
1483 }
1484 continue;
1485 /*NOTREACHED*/
1486 }
39236c6e 1487
2d21ac55
A		 1488 /* prefered new sa rather than old sa */
1489 if (candidate->lft_c->sadb_lifetime_addtime <
39236c6e 1490 currsav->lft_c->sadb_lifetime_addtime)
2d21ac55
A		 1491 candidate = currsav;
1492 }
39236c6e
A		 1493
1494 if (candidate) {
2d21ac55
A		 1495 outsav->natt_encapsulated_src_port = candidate->natt_encapsulated_src_port;
1496 return 1;
1497 }
39236c6e 1498
2d21ac55
A		 1499 return 0;
1500}
1501
1c79356b
A		 1502/*
1503 * Must be called after calling key_allocsp().
1c79356b
A		 1504 */
1505void
6d2010ae 1506key_freesp(
39236c6e
A		 1507 struct secpolicy *sp,
1508 int locked)
1c79356b 1509{
39236c6e 1510
1c79356b
A		 1511 /* sanity check */
1512 if (sp == NULL)
1513 panic("key_freesp: NULL pointer is passed.\n");
2d21ac55
A		 1514
1515 if (!locked)
1516 lck_mtx_lock(sadb_mutex);
1517 else
1518 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
1c79356b
A		 1519 sp->refcnt--;
1520 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
39236c6e
A		 1521 printf("DP freesp cause refcnt--:%d SP:0x%llx\n",
1522 sp->refcnt, (uint64_t)VM_KERNEL_ADDRPERM(sp)));
1523
1c79356b
A		 1524 if (sp->refcnt == 0)
1525 key_delsp(sp);
2d21ac55
A		 1526 if (!locked)
1527 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 1528 return;
1529}
1530
1c79356b
A		 1531/*
1532 * Must be called after calling key_allocsa().
1533 * This function is called by key_freesp() to free some SA allocated
1534 * for a policy.
1535 */
1536void
6d2010ae 1537key_freesav(
39236c6e
A		 1538 struct secasvar *sav,
1539 int locked)
1c79356b 1540{
39236c6e 1541
1c79356b
A		 1542 /* sanity check */
1543 if (sav == NULL)
1544 panic("key_freesav: NULL pointer is passed.\n");
39236c6e 1545
2d21ac55
A		 1546 if (!locked)
1547 lck_mtx_lock(sadb_mutex);
1548 else
1549 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
1c79356b
A		 1550 sav->refcnt--;
1551 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
39236c6e
A		 1552 printf("DP freesav cause refcnt--:%d SA:0x%llx SPI %u\n",
1553 sav->refcnt, (uint64_t)VM_KERNEL_ADDRPERM(sav),
1554 (u_int32_t)ntohl(sav->spi)));
1555
1c79356b
A		 1556 if (sav->refcnt == 0)
1557 key_delsav(sav);
2d21ac55
A		 1558 if (!locked)
1559 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 1560 return;
1561}
1562
1563/* %%% SPD management */
1564/*
1565 * free security policy entry.
1566 */
1567static void
6d2010ae 1568key_delsp(
39236c6e 1569 struct secpolicy *sp)
1c79356b 1570{
39236c6e 1571
1c79356b
A		 1572 /* sanity check */
1573 if (sp == NULL)
1574 panic("key_delsp: NULL pointer is passed.\n");
39236c6e 1575
2d21ac55 1576 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
1c79356b 1577 sp->state = IPSEC_SPSTATE_DEAD;
39236c6e 1578
1c79356b
A		 1579 if (sp->refcnt > 0)
1580 return; /* can't free */
39236c6e 1581
1c79356b 1582 /* remove from SP index */
2d21ac55 1583 if (__LIST_CHAINED(sp)) {
1c79356b 1584 LIST_REMOVE(sp, chain);
2d21ac55
A		 1585 ipsec_policy_count--;
1586 }
39236c6e
A		 1587
1588 if (sp->spidx.internal_if) {
1589 ifnet_release(sp->spidx.internal_if);
1590 sp->spidx.internal_if = NULL;
1591 }
1592
1593 if (sp->ipsec_if) {
1594 ifnet_release(sp->ipsec_if);
1595 sp->ipsec_if = NULL;
1596 }
1597
1598 if (sp->outgoing_if) {
1599 ifnet_release(sp->outgoing_if);
1600 sp->outgoing_if = NULL;
1601 }
1602
1c79356b 1603 {
2d21ac55 1604 struct ipsecrequest *isr = sp->req, *nextisr;
39236c6e 1605
2d21ac55
A		 1606 while (isr != NULL) {
1607 nextisr = isr->next;
1608 KFREE(isr);
1609 isr = nextisr;
1610 }
1c79356b 1611 }
1c79356b 1612 keydb_delsecpolicy(sp);
39236c6e 1613
1c79356b
A		 1614 return;
1615}
1616
1617/*
1618 * search SPD
1619 * OUT: NULL : not found
1620 * others : found, pointer to a SP.
1621 */
1622static struct secpolicy *
6d2010ae 1623key_getsp(
39236c6e 1624 struct secpolicyindex *spidx)
1c79356b
A		 1625{
1626 struct secpolicy *sp;
39236c6e 1627
91447636 1628 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 1629
1c79356b
A		 1630 /* sanity check */
1631 if (spidx == NULL)
1632 panic("key_getsp: NULL pointer is passed.\n");
39236c6e 1633
1c79356b
A		 1634 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1635 if (sp->state == IPSEC_SPSTATE_DEAD)
1636 continue;
1637 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1638 sp->refcnt++;
1639 return sp;
1640 }
1641 }
39236c6e 1642
1c79356b
A		 1643 return NULL;
1644}
1645
1646/*
1647 * get SP by index.
1648 * OUT: NULL : not found
1649 * others : found, pointer to a SP.
1650 */
39236c6e 1651struct secpolicy *
6d2010ae 1652key_getspbyid(
39236c6e 1653 u_int32_t id)
1c79356b
A		 1654{
1655 struct secpolicy *sp;
39236c6e
A		 1656
1657 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
1658
1659 lck_mtx_lock(sadb_mutex);
1660 sp = __key_getspbyid(id);
1661 lck_mtx_unlock(sadb_mutex);
1662
1663 return sp;
1664}
1c79356b 1665
39236c6e
A		 1666static struct secpolicy *
1667__key_getspbyid(u_int32_t id)
1668{
1669 struct secpolicy *sp;
1670
91447636 1671 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 1672
1c79356b
A		 1673 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1674 if (sp->state == IPSEC_SPSTATE_DEAD)
1675 continue;
1676 if (sp->id == id) {
1677 sp->refcnt++;
1678 return sp;
1679 }
1680 }
39236c6e 1681
1c79356b
A		 1682 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1683 if (sp->state == IPSEC_SPSTATE_DEAD)
1684 continue;
1685 if (sp->id == id) {
1686 sp->refcnt++;
1687 return sp;
1688 }
1689 }
39236c6e 1690
1c79356b
A		 1691 return NULL;
1692}
1693
1694struct secpolicy *
6d2010ae 1695key_newsp(void)
1c79356b
A		 1696{
1697 struct secpolicy *newsp = NULL;
2d21ac55
A		 1698
1699 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
1c79356b
A		 1700 newsp = keydb_newsecpolicy();
1701 if (!newsp)
1702 return newsp;
39236c6e 1703
1c79356b
A		 1704 newsp->refcnt = 1;
1705 newsp->req = NULL;
39236c6e 1706
1c79356b
A		 1707 return newsp;
1708}
1709
1710/*
1711 * create secpolicy structure from sadb_x_policy structure.
1712 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1713 * so must be set properly later.
1714 */
1715struct secpolicy *
6d2010ae 1716key_msg2sp(
39236c6e
A		 1717 struct sadb_x_policy *xpl0,
1718 size_t len,
1719 int *error)
1c79356b
A		 1720{
1721 struct secpolicy *newsp;
39236c6e 1722
2d21ac55
A		 1723 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
1724
1c79356b
A		 1725 /* sanity check */
1726 if (xpl0 == NULL)
1727 panic("key_msg2sp: NULL pointer was passed.\n");
1728 if (len < sizeof(*xpl0))
1729 panic("key_msg2sp: invalid length.\n");
1730 if (len != PFKEY_EXTLEN(xpl0)) {
55e303ae 1731 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1c79356b
A		 1732 *error = EINVAL;
1733 return NULL;
1734 }
39236c6e 1735
1c79356b
A		 1736 if ((newsp = key_newsp()) == NULL) {
1737 *error = ENOBUFS;
1738 return NULL;
1739 }
39236c6e 1740
1c79356b
A		 1741 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1742 newsp->policy = xpl0->sadb_x_policy_type;
39236c6e 1743
1c79356b
A		 1744 /* check policy */
1745 switch (xpl0->sadb_x_policy_type) {
39236c6e 1746 case IPSEC_POLICY_DISCARD:
2d21ac55 1747 case IPSEC_POLICY_GENERATE:
39236c6e
A		 1748 case IPSEC_POLICY_NONE:
1749 case IPSEC_POLICY_ENTRUST:
1750 case IPSEC_POLICY_BYPASS:
1751 newsp->req = NULL;
1752 break;
1753
1754 case IPSEC_POLICY_IPSEC:
1c79356b 1755 {
39236c6e
A		 1756 int tlen;
1757 struct sadb_x_ipsecrequest *xisr;
1758 struct ipsecrequest **p_isr = &newsp->req;
1759
1760 /* validity check */
1761 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
55e303ae 1762 ipseclog((LOG_DEBUG,
39236c6e 1763 "key_msg2sp: Invalid msg length.\n"));
2d21ac55 1764 key_freesp(newsp, KEY_SADB_UNLOCKED);
1c79356b
A		 1765 *error = EINVAL;
1766 return NULL;
1767 }
39236c6e
A		 1768
1769 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1770 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1771
1772 while (tlen > 0) {
1773
1774 /* length check */
1775 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1776 ipseclog((LOG_DEBUG, "key_msg2sp: "
1777 "invalid ipsecrequest length.\n"));
1778 key_freesp(newsp, KEY_SADB_UNLOCKED);
1779 *error = EINVAL;
1780 return NULL;
1781 }
1782
1783 /* allocate request buffer */
1784 KMALLOC_WAIT(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1785 if ((*p_isr) == NULL) {
55e303ae 1786 ipseclog((LOG_DEBUG,
39236c6e
A		 1787 "key_msg2sp: No more memory.\n"));
1788 key_freesp(newsp, KEY_SADB_UNLOCKED);
1789 *error = ENOBUFS;
1790 return NULL;
1c79356b 1791 }
39236c6e
A		 1792 bzero(*p_isr, sizeof(**p_isr));
1793
1794 /* set values */
1795 (*p_isr)->next = NULL;
1796
1797 switch (xisr->sadb_x_ipsecrequest_proto) {
1798 case IPPROTO_ESP:
1799 case IPPROTO_AH:
1800 case IPPROTO_IPCOMP:
1801 break;
1802 default:
1803 ipseclog((LOG_DEBUG,
1804 "key_msg2sp: invalid proto type=%u\n",
1805 xisr->sadb_x_ipsecrequest_proto));
2d21ac55 1806 key_freesp(newsp, KEY_SADB_UNLOCKED);
39236c6e 1807 *error = EPROTONOSUPPORT;
1c79356b 1808 return NULL;
1c79356b 1809 }
39236c6e
A		 1810 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1811
1812 switch (xisr->sadb_x_ipsecrequest_mode) {
1813 case IPSEC_MODE_TRANSPORT:
1814 case IPSEC_MODE_TUNNEL:
1815 break;
1816 case IPSEC_MODE_ANY:
1817 default:
1818 ipseclog((LOG_DEBUG,
1819 "key_msg2sp: invalid mode=%u\n",
1820 xisr->sadb_x_ipsecrequest_mode));
1821 key_freesp(newsp, KEY_SADB_UNLOCKED);
1822 *error = EINVAL;
1823 return NULL;
1c79356b 1824 }
39236c6e
A		 1825 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1826
1827 switch (xisr->sadb_x_ipsecrequest_level) {
1828 case IPSEC_LEVEL_DEFAULT:
1829 case IPSEC_LEVEL_USE:
1830 case IPSEC_LEVEL_REQUIRE:
1831 break;
1832 case IPSEC_LEVEL_UNIQUE:
1833 /* validity check */
1834 /*
1835 * If range violation of reqid, kernel will
1836 * update it, don't refuse it.
1837 */
1838 if (xisr->sadb_x_ipsecrequest_reqid
1839 > IPSEC_MANUAL_REQID_MAX) {
1840 ipseclog((LOG_DEBUG,
1841 "key_msg2sp: reqid=%d range "
1842 "violation, updated by kernel.\n",
1843 xisr->sadb_x_ipsecrequest_reqid));
1844 xisr->sadb_x_ipsecrequest_reqid = 0;
1845 }
1846
1847 /* allocate new reqid id if reqid is zero. */
1848 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1849 u_int32_t reqid;
1850 if ((reqid = key_newreqid()) == 0) {
1851 key_freesp(newsp, KEY_SADB_UNLOCKED);
1852 *error = ENOBUFS;
1853 return NULL;
1854 }
1855 (*p_isr)->saidx.reqid = reqid;
1856 xisr->sadb_x_ipsecrequest_reqid = reqid;
1857 } else {
1858 /* set it for manual keying. */
1859 (*p_isr)->saidx.reqid =
1860 xisr->sadb_x_ipsecrequest_reqid;
1861 }
1862 break;
1863
1864 default:
1865 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1866 xisr->sadb_x_ipsecrequest_level));
1867 key_freesp(newsp, KEY_SADB_UNLOCKED);
1868 *error = EINVAL;
1869 return NULL;
1870 }
1871 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1872
1873 /* set IP addresses if there */
1874 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1875 struct sockaddr *paddr;
1876
1877 paddr = (struct sockaddr *)(xisr + 1);
1878
1879 /* validity check */
1880 if (paddr->sa_len
1881 > sizeof((*p_isr)->saidx.src)) {
1882 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1883 "address length.\n"));
1884 key_freesp(newsp, KEY_SADB_UNLOCKED);
1885 *error = EINVAL;
1886 return NULL;
1887 }
1888 bcopy(paddr, &(*p_isr)->saidx.src,
1889 paddr->sa_len);
1890
1891 paddr = (struct sockaddr *)((caddr_t)paddr
1892 + paddr->sa_len);
1893
1894 /* validity check */
1895 if (paddr->sa_len
1896 > sizeof((*p_isr)->saidx.dst)) {
1897 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1898 "address length.\n"));
1899 key_freesp(newsp, KEY_SADB_UNLOCKED);
1900 *error = EINVAL;
1901 return NULL;
1902 }
1903 bcopy(paddr, &(*p_isr)->saidx.dst,
1904 paddr->sa_len);
1905 }
1906
1907 (*p_isr)->sp = newsp;
1908
1909 /* initialization for the next. */
1910 p_isr = &(*p_isr)->next;
1911 tlen -= xisr->sadb_x_ipsecrequest_len;
1912
1c79356b 1913 /* validity check */
39236c6e
A		 1914 if (tlen < 0) {
1915 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
2d21ac55 1916 key_freesp(newsp, KEY_SADB_UNLOCKED);
1c79356b
A		 1917 *error = EINVAL;
1918 return NULL;
1919 }
39236c6e
A		 1920
1921 xisr = (struct sadb_x_ipsecrequest *)(void *)
316670eb 1922 ((caddr_t)xisr + xisr->sadb_x_ipsecrequest_len);
39236c6e 1923 }
1c79356b 1924 }
39236c6e
A		 1925 break;
1926 default:
1927 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1928 key_freesp(newsp, KEY_SADB_UNLOCKED);
1929 *error = EINVAL;
1930 return NULL;
1c79356b 1931 }
39236c6e 1932
1c79356b
A		 1933 *error = 0;
1934 return newsp;
1935}
1936
1937static u_int32_t
6d2010ae 1938key_newreqid(void)
1c79356b 1939{
2d21ac55 1940 lck_mtx_lock(sadb_mutex);
1c79356b 1941 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
316670eb 1942 int done = 0;
39236c6e 1943
316670eb 1944 /* The reqid must be limited to 16 bits because the PF_KEY message format only uses
39236c6e
A		 1945 16 bits for this field. Once it becomes larger than 16 bits - ipsec fails to
1946 work anymore. Changing the PF_KEY message format would introduce compatibility
1947 issues. This code now tests to see if the tentative reqid is in use */
1948
316670eb
A		 1949 while (!done) {
1950 struct secpolicy *sp;
39236c6e 1951 struct ipsecrequest *isr;
316670eb 1952 int dir;
39236c6e 1953
316670eb 1954 auto_reqid = (auto_reqid == 0xFFFF
39236c6e
A		 1955 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1956
316670eb
A		 1957 /* check for uniqueness */
1958 done = 1;
1959 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
1960 LIST_FOREACH(sp, &sptree[dir], chain) {
1961 for (isr = sp->req; isr != NULL; isr = isr->next) {
1962 if (isr->saidx.reqid == auto_reqid) {
1963 done = 0;
1964 break;
1965 }
1966 }
1967 if (done == 0)
1968 break;
1969 }
1970 if (done == 0)
1971 break;
39236c6e 1972 }
316670eb 1973 }
39236c6e 1974
316670eb 1975 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 1976 return auto_reqid;
1977}
1978
1979/*
1980 * copy secpolicy struct to sadb_x_policy structure indicated.
1981 */
1982struct mbuf *
6d2010ae 1983key_sp2msg(
39236c6e 1984 struct secpolicy *sp)
1c79356b
A		 1985{
1986 struct sadb_x_policy *xpl;
1987 int tlen;
1988 caddr_t p;
1989 struct mbuf *m;
39236c6e 1990
1c79356b
A		 1991 /* sanity check. */
1992 if (sp == NULL)
1993 panic("key_sp2msg: NULL pointer was passed.\n");
39236c6e 1994
1c79356b 1995 tlen = key_getspreqmsglen(sp);
39236c6e 1996
9bccf70c
A		 1997 m = key_alloc_mbuf(tlen);
1998 if (!m || m->m_next) { /*XXX*/
1c79356b 1999 if (m)
9bccf70c 2000 m_freem(m);
1c79356b
A		 2001 return NULL;
2002 }
39236c6e 2003
1c79356b
A		 2004 m->m_len = tlen;
2005 m->m_next = NULL;
2006 xpl = mtod(m, struct sadb_x_policy *);
2007 bzero(xpl, tlen);
39236c6e 2008
1c79356b
A		 2009 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
2010 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
2011 xpl->sadb_x_policy_type = sp->policy;
2012 xpl->sadb_x_policy_dir = sp->spidx.dir;
2013 xpl->sadb_x_policy_id = sp->id;
2014 p = (caddr_t)xpl + sizeof(*xpl);
39236c6e 2015
1c79356b
A		 2016 /* if is the policy for ipsec ? */
2017 if (sp->policy == IPSEC_POLICY_IPSEC) {
2018 struct sadb_x_ipsecrequest *xisr;
2019 struct ipsecrequest *isr;
39236c6e 2020
1c79356b 2021 for (isr = sp->req; isr != NULL; isr = isr->next) {
39236c6e 2022
316670eb 2023 xisr = (struct sadb_x_ipsecrequest *)(void *)p;
39236c6e 2024
1c79356b
A		 2025 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
2026 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
2027 xisr->sadb_x_ipsecrequest_level = isr->level;
2028 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
39236c6e 2029
1c79356b
A		 2030 p += sizeof(*xisr);
2031 bcopy(&isr->saidx.src, p, isr->saidx.src.ss_len);
2032 p += isr->saidx.src.ss_len;
2033 bcopy(&isr->saidx.dst, p, isr->saidx.dst.ss_len);
2034 p += isr->saidx.src.ss_len;
39236c6e 2035
1c79356b 2036 xisr->sadb_x_ipsecrequest_len =
39236c6e
A		 2037 PFKEY_ALIGN8(sizeof(*xisr)
2038 + isr->saidx.src.ss_len
2039 + isr->saidx.dst.ss_len);
1c79356b
A		 2040 }
2041 }
39236c6e 2042
1c79356b
A		 2043 return m;
2044}
2045
9bccf70c
A		 2046/* m will not be freed nor modified */
2047static struct mbuf *
2048key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
39236c6e 2049 int ndeep, int nitem, int *items)
9bccf70c
A		 2050{
2051 int idx;
2052 int i;
2053 struct mbuf *result = NULL, *n;
2054 int len;
39236c6e 2055
9bccf70c
A		 2056 if (m == NULL || mhp == NULL)
2057 panic("null pointer passed to key_gather");
39236c6e 2058
9bccf70c
A		 2059 for (i = 0; i < nitem; i++) {
2060 idx = items[i];
2061 if (idx < 0 || idx > SADB_EXT_MAX)
2062 goto fail;
2063 /* don't attempt to pull empty extension */
2064 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
2065 continue;
2066 if (idx != SADB_EXT_RESERVED &&
2067 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
2068 continue;
39236c6e 2069
9bccf70c
A		 2070 if (idx == SADB_EXT_RESERVED) {
2071 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
39236c6e 2072 MGETHDR(n, M_WAITOK, MT_DATA); // sadb_msg len < MHLEN - enforced by _CASSERT
9bccf70c
A		 2073 if (!n)
2074 goto fail;
2075 n->m_len = len;
2076 n->m_next = NULL;
2077 m_copydata(m, 0, sizeof(struct sadb_msg),
39236c6e 2078 mtod(n, caddr_t));
9bccf70c
A		 2079 } else if (i < ndeep) {
2080 len = mhp->extlen[idx];
2081 n = key_alloc_mbuf(len);
2082 if (!n || n->m_next) { /*XXX*/
2083 if (n)
2084 m_freem(n);
2085 goto fail;
2086 }
2087 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
39236c6e 2088 mtod(n, caddr_t));
9bccf70c
A		 2089 } else {
2090 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
39236c6e 2091 M_WAITOK);
9bccf70c
A		 2092 }
2093 if (n == NULL)
2094 goto fail;
39236c6e 2095
9bccf70c
A		 2096 if (result)
2097 m_cat(result, n);
2098 else
2099 result = n;
2100 }
39236c6e 2101
9bccf70c
A		 2102 if ((result->m_flags & M_PKTHDR) != 0) {
2103 result->m_pkthdr.len = 0;
2104 for (n = result; n; n = n->m_next)
2105 result->m_pkthdr.len += n->m_len;
2106 }
39236c6e 2107
9bccf70c 2108 return result;
39236c6e 2109
9bccf70c
A		 2110fail:
2111 m_freem(result);
2112 return NULL;
2113}
2114
1c79356b
A		 2115/*
2116 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
2117 * add a entry to SP database, when received
9bccf70c 2118 * <base, address(SD), (lifetime(H),) policy>
1c79356b
A		 2119 * from the user(?).
2120 * Adding to SP database,
2121 * and send
9bccf70c 2122 * <base, address(SD), (lifetime(H),) policy>
1c79356b
A		 2123 * to the socket which was send.
2124 *
2125 * SPDADD set a unique policy entry.
2126 * SPDSETIDX like SPDADD without a part of policy requests.
2127 * SPDUPDATE replace a unique policy entry.
2128 *
9bccf70c 2129 * m will always be freed.
1c79356b 2130 */
9bccf70c 2131static int
6d2010ae 2132key_spdadd(
39236c6e
A		 2133 struct socket *so,
2134 struct mbuf *m,
2135 const struct sadb_msghdr *mhp)
1c79356b 2136{
39236c6e 2137 struct sadb_address *src0, *dst0, *src1, *dst1;
9bccf70c
A		 2138 struct sadb_x_policy *xpl0, *xpl;
2139 struct sadb_lifetime *lft = NULL;
1c79356b
A		 2140 struct secpolicyindex spidx;
2141 struct secpolicy *newsp;
9bccf70c 2142 struct timeval tv;
39236c6e
A		 2143 ifnet_t internal_if = NULL;
2144 char *outgoing_if = NULL;
2145 char *ipsec_if = NULL;
2146 struct sadb_x_ipsecif *ipsecifopts = NULL;
1c79356b 2147 int error;
39236c6e
A		 2148 int use_src_range = 0;
2149 int use_dst_range = 0;
2150 int init_disabled = 0;
2151 int address_family, address_len;
2152
2d21ac55
A		 2153 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2154
1c79356b 2155 /* sanity check */
9bccf70c 2156 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 2157 panic("key_spdadd: NULL pointer is passed.\n");
39236c6e
A		 2158
2159 if (mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_START] != NULL && mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_END] != NULL) {
2160 use_src_range = 1;
2161 }
2162 if (mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_START] != NULL && mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_END] != NULL) {
2163 use_dst_range = 1;
2164 }
2165
2166 if ((!use_src_range && mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL) ||
2167 (!use_dst_range && mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) ||
9bccf70c 2168 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
55e303ae 2169 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
9bccf70c
A		 2170 return key_senderror(so, m, EINVAL);
2171 }
39236c6e
A		 2172 if ((use_src_range && (mhp->extlen[SADB_X_EXT_ADDR_RANGE_SRC_START] < sizeof(struct sadb_address)
2173 || mhp->extlen[SADB_X_EXT_ADDR_RANGE_SRC_END] < sizeof(struct sadb_address))) ||
2174 (!use_src_range && mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address)) ||
2175 (use_dst_range && (mhp->extlen[SADB_X_EXT_ADDR_RANGE_DST_START] < sizeof(struct sadb_address)
2176 || mhp->extlen[SADB_X_EXT_ADDR_RANGE_DST_END] < sizeof(struct sadb_address))) ||
2177 (!use_dst_range && mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) ||
9bccf70c 2178 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
55e303ae 2179 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
9bccf70c
A		 2180 return key_senderror(so, m, EINVAL);
2181 }
2182 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
2183 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
2184 < sizeof(struct sadb_lifetime)) {
55e303ae 2185 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
9bccf70c
A		 2186 return key_senderror(so, m, EINVAL);
2187 }
316670eb 2188 lft = (struct sadb_lifetime *)
39236c6e 2189 (void *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1c79356b 2190 }
39236c6e
A		 2191 if (mhp->ext[SADB_X_EXT_IPSECIF] != NULL) {
2192 if (mhp->extlen[SADB_X_EXT_IPSECIF] < sizeof(struct sadb_x_ipsecif)) {
2193 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
2194 return key_senderror(so, m, EINVAL);
2195 }
2196 }
2197
2198 if (use_src_range) {
2199 src0 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_START];
2200 src1 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_END];
2201 } else {
2202 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
2203 }
2204 if (use_dst_range) {
2205 dst0 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_START];
2206 dst1 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_END];
2207 } else {
2208 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
2209 }
316670eb 2210 xpl0 = (struct sadb_x_policy *)(void *)mhp->ext[SADB_X_EXT_POLICY];
39236c6e
A		 2211 ipsecifopts = (struct sadb_x_ipsecif *)(void *)mhp->ext[SADB_X_EXT_IPSECIF];
2212
2213 /* check addresses */
2214 address_family = ((struct sockaddr *)(src0 + 1))->sa_family;
2215 address_len = ((struct sockaddr *)(src0 + 1))->sa_len;
2216 if (use_src_range) {
2217 if (((struct sockaddr *)(src1+ 1))->sa_family != address_family ||
2218 ((struct sockaddr *)(src1+ 1))->sa_len != address_len) {
2219 return key_senderror(so, m, EINVAL);
2220 }
2221 }
2222 if (((struct sockaddr *)(dst0+ 1))->sa_family != address_family ||
2223 ((struct sockaddr *)(dst0+ 1))->sa_len != address_len) {
2224 return key_senderror(so, m, EINVAL);
2225 }
2226 if (use_dst_range) {
2227 if (((struct sockaddr *)(dst1+ 1))->sa_family != address_family ||
2228 ((struct sockaddr *)(dst1+ 1))->sa_len != address_len) {
2229 return key_senderror(so, m, EINVAL);
2230 }
2231 }
2232
fe8ab488 2233 /* checking the direction. */
1c79356b 2234 switch (xpl0->sadb_x_policy_dir) {
39236c6e
A		 2235 case IPSEC_DIR_INBOUND:
2236 case IPSEC_DIR_OUTBOUND:
2237 break;
2238 default:
2239 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
2240 mhp->msg->sadb_msg_errno = EINVAL;
2241 return 0;
2242 }
2243
2244 /* check policy */
1c79356b
A		 2245 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
2246 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
39236c6e 2247 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
55e303ae 2248 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
9bccf70c 2249 return key_senderror(so, m, EINVAL);
1c79356b 2250 }
39236c6e 2251
1c79356b 2252 /* policy requests are mandatory when action is ipsec. */
39236c6e
A		 2253 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
2254 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
2255 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
55e303ae 2256 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
9bccf70c 2257 return key_senderror(so, m, EINVAL);
1c79356b 2258 }
39236c6e
A		 2259
2260 /* Process interfaces */
2261 if (ipsecifopts != NULL) {
3e170ce0 2262 if (ipsecifopts->sadb_x_ipsecif_internal_if[0]) {
39236c6e
A		 2263 ifnet_find_by_name(ipsecifopts->sadb_x_ipsecif_internal_if, &internal_if);
2264 }
3e170ce0 2265 if (ipsecifopts->sadb_x_ipsecif_outgoing_if[0]) {
39236c6e
A		 2266 outgoing_if = ipsecifopts->sadb_x_ipsecif_outgoing_if;
2267 }
3e170ce0 2268 if (ipsecifopts->sadb_x_ipsecif_ipsec_if[0]) {
39236c6e
A		 2269 ipsec_if = ipsecifopts->sadb_x_ipsecif_ipsec_if;
2270 }
2271 init_disabled = ipsecifopts->sadb_x_ipsecif_init_disabled;
2272 }
2273
2274 /* make secindex */
2275 /* XXX boundary check against sa_len */
2276 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2277 src0 + 1,
2278 dst0 + 1,
2279 src0->sadb_address_prefixlen,
2280 dst0->sadb_address_prefixlen,
2281 src0->sadb_address_proto,
2282 internal_if,
2283 use_src_range ? src0 + 1 : NULL,
2284 use_src_range ? src1 + 1 : NULL,
2285 use_dst_range ? dst0 + 1 : NULL,
2286 use_dst_range ? dst1 + 1 : NULL,
2287 &spidx);
2288
1c79356b
A		 2289 /*
2290 * checking there is SP already or not.
55e303ae
A		 2291 * SPDUPDATE doesn't depend on whether there is a SP or not.
2292 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
2293 * then error.
1c79356b 2294 */
2d21ac55 2295 lck_mtx_lock(sadb_mutex);
1c79356b 2296 newsp = key_getsp(&spidx);
9bccf70c 2297 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
55e303ae
A		 2298 if (newsp) {
2299 newsp->state = IPSEC_SPSTATE_DEAD;
2d21ac55 2300 key_freesp(newsp, KEY_SADB_LOCKED);
1c79356b 2301 }
1c79356b
A		 2302 } else {
2303 if (newsp != NULL) {
2d21ac55 2304 key_freesp(newsp, KEY_SADB_LOCKED);
55e303ae 2305 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
2d21ac55 2306 lck_mtx_unlock(sadb_mutex);
39236c6e
A		 2307 if (internal_if) {
2308 ifnet_release(internal_if);
2309 internal_if = NULL;
2310 }
9bccf70c 2311 return key_senderror(so, m, EEXIST);
1c79356b
A		 2312 }
2313 }
2d21ac55 2314 lck_mtx_unlock(sadb_mutex);
39236c6e 2315
1c79356b
A		 2316 /* allocation new SP entry */
2317 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
39236c6e
A		 2318 if (internal_if) {
2319 ifnet_release(internal_if);
2320 internal_if = NULL;
2321 }
9bccf70c 2322 return key_senderror(so, m, error);
1c79356b 2323 }
39236c6e 2324
1c79356b 2325 if ((newsp->id = key_getnewspid()) == 0) {
1c79356b 2326 keydb_delsecpolicy(newsp);
39236c6e
A		 2327 if (internal_if) {
2328 ifnet_release(internal_if);
2329 internal_if = NULL;
2330 }
9bccf70c 2331 return key_senderror(so, m, ENOBUFS);
1c79356b 2332 }
39236c6e 2333
9bccf70c 2334 /* XXX boundary check against sa_len */
1c79356b
A		 2335 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2336 src0 + 1,
2337 dst0 + 1,
2338 src0->sadb_address_prefixlen,
2339 dst0->sadb_address_prefixlen,
2340 src0->sadb_address_proto,
39236c6e
A		 2341 internal_if,
2342 use_src_range ? src0 + 1 : NULL,
2343 use_src_range ? src1 + 1 : NULL,
2344 use_dst_range ? dst0 + 1 : NULL,
2345 use_dst_range ? dst1 + 1 : NULL,
1c79356b 2346 &newsp->spidx);
39236c6e 2347
1c79356b 2348#if 1
39236c6e 2349 /*
490019cf 2350 * allow IPv6 over IPv4 or IPv4 over IPv6 tunnels using ESP -
39236c6e 2351 * otherwise reject if inner and outer address families not equal
2d21ac55 2352 */
1c79356b
A		 2353 if (newsp->req && newsp->req->saidx.src.ss_family) {
2354 struct sockaddr *sa;
2355 sa = (struct sockaddr *)(src0 + 1);
2356 if (sa->sa_family != newsp->req->saidx.src.ss_family) {
490019cf 2357 if (newsp->req->saidx.mode != IPSEC_MODE_TUNNEL || newsp->req->saidx.proto != IPPROTO_ESP) {
2d21ac55 2358 keydb_delsecpolicy(newsp);
39236c6e
A		 2359 if (internal_if) {
2360 ifnet_release(internal_if);
2361 internal_if = NULL;
2362 }
2d21ac55
A		 2363 return key_senderror(so, m, EINVAL);
2364 }
1c79356b
A		 2365 }
2366 }
2367 if (newsp->req && newsp->req->saidx.dst.ss_family) {
2368 struct sockaddr *sa;
2369 sa = (struct sockaddr *)(dst0 + 1);
2370 if (sa->sa_family != newsp->req->saidx.dst.ss_family) {
490019cf 2371 if (newsp->req->saidx.mode != IPSEC_MODE_TUNNEL || newsp->req->saidx.proto != IPPROTO_ESP) {
2d21ac55 2372 keydb_delsecpolicy(newsp);
39236c6e
A		 2373 if (internal_if) {
2374 ifnet_release(internal_if);
2375 internal_if = NULL;
2376 }
2d21ac55
A		 2377 return key_senderror(so, m, EINVAL);
2378 }
1c79356b
A		 2379 }
2380 }
2381#endif
39236c6e 2382
9bccf70c
A		 2383 microtime(&tv);
2384 newsp->created = tv.tv_sec;
2385 newsp->lastused = tv.tv_sec;
2386 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
2387 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
39236c6e
A		 2388
2389 if (outgoing_if != NULL) {
2390 ifnet_find_by_name(outgoing_if, &newsp->outgoing_if);
2391 }
2392 if (ipsec_if != NULL) {
2393 ifnet_find_by_name(ipsec_if, &newsp->ipsec_if);
2394 }
2395 if (init_disabled > 0) {
2396 newsp->disabled = 1;
2397 }
2398
1c79356b
A		 2399 newsp->refcnt = 1; /* do not reclaim until I say I do */
2400 newsp->state = IPSEC_SPSTATE_ALIVE;
2d21ac55
A		 2401 lck_mtx_lock(sadb_mutex);
2402 /*
2403 * policies of type generate should be at the end of the SPD
2404 * because they function as default discard policies
39236c6e
A		 2405 * Don't start timehandler for generate policies
2406 */
2407 if (newsp->policy == IPSEC_POLICY_GENERATE)
2d21ac55
A		 2408 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
2409 else { /* XXX until we have policy ordering in the kernel */
2410 struct secpolicy *tmpsp;
39236c6e 2411
2d21ac55 2412 LIST_FOREACH(tmpsp, &sptree[newsp->spidx.dir], chain)
39236c6e
A		 2413 if (tmpsp->policy == IPSEC_POLICY_GENERATE)
2414 break;
2d21ac55
A		 2415 if (tmpsp)
2416 LIST_INSERT_BEFORE(tmpsp, newsp, chain);
2417 else
2418 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
39236c6e 2419 key_start_timehandler();
2d21ac55 2420 }
39236c6e 2421
2d21ac55 2422 ipsec_policy_count++;
9bccf70c
A		 2423 /* Turn off the ipsec bypass */
2424 if (ipsec_bypass != 0)
2425 ipsec_bypass = 0;
39236c6e 2426
1c79356b 2427 /* delete the entry in spacqtree */
9bccf70c 2428 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1c79356b
A		 2429 struct secspacq *spacq;
2430 if ((spacq = key_getspacq(&spidx)) != NULL) {
9bccf70c
A		 2431 /* reset counter in order to deletion by timehandler. */
2432 microtime(&tv);
2433 spacq->created = tv.tv_sec;
1c79356b
A		 2434 spacq->count = 0;
2435 }
2d21ac55
A		 2436 }
2437 lck_mtx_unlock(sadb_mutex);
39236c6e 2438
1c79356b 2439 {
39236c6e
A		 2440 struct mbuf *n, *mpolicy;
2441 struct sadb_msg *newmsg;
2442 int off;
2443
2444 /* create new sadb_msg to reply. */
2445 if (lft) {
2446 int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY,
2447 SADB_EXT_LIFETIME_HARD, SADB_EXT_ADDRESS_SRC,
2448 SADB_EXT_ADDRESS_DST, SADB_X_EXT_ADDR_RANGE_SRC_START, SADB_X_EXT_ADDR_RANGE_SRC_END,
2449 SADB_X_EXT_ADDR_RANGE_DST_START, SADB_X_EXT_ADDR_RANGE_DST_END};
2450 n = key_gather_mbuf(m, mhp, 2, sizeof(mbufItems)/sizeof(int), mbufItems);
2451 } else {
2452 int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY,
2453 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
2454 SADB_X_EXT_ADDR_RANGE_SRC_START, SADB_X_EXT_ADDR_RANGE_SRC_END,
2455 SADB_X_EXT_ADDR_RANGE_DST_START, SADB_X_EXT_ADDR_RANGE_DST_END};
2456 n = key_gather_mbuf(m, mhp, 2, sizeof(mbufItems)/sizeof(int), mbufItems);
2457 }
9bccf70c
A		 2458 if (!n)
2459 return key_senderror(so, m, ENOBUFS);
39236c6e
A		 2460
2461 if (n->m_len < sizeof(*newmsg)) {
2462 n = m_pullup(n, sizeof(*newmsg));
2463 if (!n)
2464 return key_senderror(so, m, ENOBUFS);
2465 }
2466 newmsg = mtod(n, struct sadb_msg *);
2467 newmsg->sadb_msg_errno = 0;
2468 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2469
2470 off = 0;
2471 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
2472 sizeof(*xpl), &off);
2473 if (mpolicy == NULL) {
2474 /* n is already freed */
2475 return key_senderror(so, m, ENOBUFS);
2476 }
2477 xpl = (struct sadb_x_policy *)(void *)(mtod(mpolicy, caddr_t) + off);
2478 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
2479 m_freem(n);
2480 return key_senderror(so, m, EINVAL);
2481 }
2482 xpl->sadb_x_policy_id = newsp->id;
2483
2484 m_freem(m);
2485 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1c79356b
A		 2486 }
2487}
2488
2489/*
2490 * get new policy id.
2491 * OUT:
2492 * 0: failure.
2493 * others: success.
2494 */
2495static u_int32_t
6d2010ae 2496key_getnewspid(void)
1c79356b
A		 2497{
2498 u_int32_t newid = 0;
2499 int count = key_spi_trycnt; /* XXX */
2500 struct secpolicy *sp;
2d21ac55 2501
1c79356b 2502 /* when requesting to allocate spi ranged */
2d21ac55 2503 lck_mtx_lock(sadb_mutex);
1c79356b 2504 while (count--) {
55e303ae 2505 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
39236c6e
A		 2506
2507 if ((sp = __key_getspbyid(newid)) == NULL)
1c79356b 2508 break;
39236c6e 2509
2d21ac55 2510 key_freesp(sp, KEY_SADB_LOCKED);
1c79356b 2511 }
2d21ac55 2512 lck_mtx_unlock(sadb_mutex);
1c79356b 2513 if (count == 0 || newid == 0) {
55e303ae 2514 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1c79356b
A		 2515 return 0;
2516 }
39236c6e 2517
1c79356b
A		 2518 return newid;
2519}
2520
2521/*
2522 * SADB_SPDDELETE processing
2523 * receive
2524 * <base, address(SD), policy(*)>
2525 * from the user(?), and set SADB_SASTATE_DEAD,
2526 * and send,
2527 * <base, address(SD), policy(*)>
2528 * to the ikmpd.
2529 * policy(*) including direction of policy.
2530 *
9bccf70c 2531 * m will always be freed.
1c79356b 2532 */
9bccf70c 2533static int
6d2010ae 2534key_spddelete(
39236c6e
A		 2535 struct socket *so,
2536 struct mbuf *m,
2537 const struct sadb_msghdr *mhp)
1c79356b 2538{
39236c6e 2539 struct sadb_address *src0, *dst0, *src1, *dst1;
1c79356b
A		 2540 struct sadb_x_policy *xpl0;
2541 struct secpolicyindex spidx;
2542 struct secpolicy *sp;
39236c6e
A		 2543 ifnet_t internal_if = NULL;
2544 struct sadb_x_ipsecif *ipsecifopts = NULL;
2545 int use_src_range = 0;
2546 int use_dst_range = 0;
2d21ac55 2547
39236c6e
A		 2548 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2549
1c79356b 2550 /* sanity check */
9bccf70c 2551 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 2552 panic("key_spddelete: NULL pointer is passed.\n");
39236c6e
A		 2553
2554 if (mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_START] != NULL && mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_END] != NULL) {
2555 use_src_range = 1;
2556 }
2557 if (mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_START] != NULL && mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_END] != NULL) {
2558 use_dst_range = 1;
2559 }
2560
2561 if ((!use_src_range && mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL) ||
2562 (!use_dst_range && mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) ||
9bccf70c 2563 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
55e303ae 2564 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
9bccf70c
A		 2565 return key_senderror(so, m, EINVAL);
2566 }
39236c6e
A		 2567 if ((use_src_range && (mhp->extlen[SADB_X_EXT_ADDR_RANGE_SRC_START] < sizeof(struct sadb_address)
2568 || mhp->extlen[SADB_X_EXT_ADDR_RANGE_SRC_END] < sizeof(struct sadb_address))) ||
2569 (!use_src_range && mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address)) ||
2570 (use_dst_range && (mhp->extlen[SADB_X_EXT_ADDR_RANGE_DST_START] < sizeof(struct sadb_address)
2571 || mhp->extlen[SADB_X_EXT_ADDR_RANGE_DST_END] < sizeof(struct sadb_address))) ||
2572 (!use_dst_range && mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) ||
9bccf70c 2573 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
55e303ae 2574 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
9bccf70c 2575 return key_senderror(so, m, EINVAL);
1c79356b 2576 }
39236c6e
A		 2577
2578 if (use_src_range) {
2579 src0 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_START];
2580 src1 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_SRC_END];
2581 } else {
2582 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
2583 }
2584 if (use_dst_range) {
2585 dst0 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_START];
2586 dst1 = (struct sadb_address *)mhp->ext[SADB_X_EXT_ADDR_RANGE_DST_END];
2587 } else {
2588 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
2589 }
316670eb 2590 xpl0 = (struct sadb_x_policy *)(void *)mhp->ext[SADB_X_EXT_POLICY];
39236c6e
A		 2591 ipsecifopts = (struct sadb_x_ipsecif *)(void *)mhp->ext[SADB_X_EXT_IPSECIF];
2592
fe8ab488 2593 /* checking the direction. */
39236c6e
A		 2594 switch (xpl0->sadb_x_policy_dir) {
2595 case IPSEC_DIR_INBOUND:
2596 case IPSEC_DIR_OUTBOUND:
2597 break;
2598 default:
2599 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
2600 return key_senderror(so, m, EINVAL);
2601 }
2602
2603 /* Process interfaces */
2604 if (ipsecifopts != NULL) {
3e170ce0 2605 if (ipsecifopts->sadb_x_ipsecif_internal_if[0]) {
39236c6e
A		 2606 ifnet_find_by_name(ipsecifopts->sadb_x_ipsecif_internal_if, &internal_if);
2607 }
2608 }
2609
1c79356b 2610 /* make secindex */
9bccf70c 2611 /* XXX boundary check against sa_len */
1c79356b
A		 2612 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2613 src0 + 1,
2614 dst0 + 1,
2615 src0->sadb_address_prefixlen,
2616 dst0->sadb_address_prefixlen,
2617 src0->sadb_address_proto,
39236c6e
A		 2618 internal_if,
2619 use_src_range ? src0 + 1 : NULL,
2620 use_src_range ? src1 + 1 : NULL,
2621 use_dst_range ? dst0 + 1 : NULL,
2622 use_dst_range ? dst1 + 1 : NULL,
1c79356b 2623 &spidx);
39236c6e 2624
1c79356b 2625 /* Is there SP in SPD ? */
2d21ac55 2626 lck_mtx_lock(sadb_mutex);
1c79356b 2627 if ((sp = key_getsp(&spidx)) == NULL) {
55e303ae 2628 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2d21ac55 2629 lck_mtx_unlock(sadb_mutex);
39236c6e
A		 2630 if (internal_if) {
2631 ifnet_release(internal_if);
2632 internal_if = NULL;
2633 }
9bccf70c 2634 return key_senderror(so, m, EINVAL);
1c79356b 2635 }
39236c6e
A		 2636
2637 if (internal_if) {
2638 ifnet_release(internal_if);
2639 internal_if = NULL;
2640 }
2641
1c79356b
A		 2642 /* save policy id to buffer to be returned. */
2643 xpl0->sadb_x_policy_id = sp->id;
39236c6e 2644
1c79356b 2645 sp->state = IPSEC_SPSTATE_DEAD;
2d21ac55
A		 2646 key_freesp(sp, KEY_SADB_LOCKED);
2647 lck_mtx_unlock(sadb_mutex);
39236c6e
A		 2648
2649
1c79356b 2650 {
39236c6e
A		 2651 struct mbuf *n;
2652 struct sadb_msg *newmsg;
2653 int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY,
2654 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
2655 SADB_X_EXT_ADDR_RANGE_SRC_START, SADB_X_EXT_ADDR_RANGE_SRC_END,
2656 SADB_X_EXT_ADDR_RANGE_DST_START, SADB_X_EXT_ADDR_RANGE_DST_END};
2657
2658 /* create new sadb_msg to reply. */
2659 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
2660 if (!n)
2661 return key_senderror(so, m, ENOBUFS);
2662
2663 newmsg = mtod(n, struct sadb_msg *);
2664 newmsg->sadb_msg_errno = 0;
2665 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2666
2667 m_freem(m);
2668 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1c79356b
A		 2669 }
2670}
2671
2672/*
2673 * SADB_SPDDELETE2 processing
2674 * receive
2675 * <base, policy(*)>
2676 * from the user(?), and set SADB_SASTATE_DEAD,
2677 * and send,
2678 * <base, policy(*)>
2679 * to the ikmpd.
2680 * policy(*) including direction of policy.
2681 *
9bccf70c 2682 * m will always be freed.
1c79356b 2683 */
9bccf70c 2684static int
6d2010ae 2685key_spddelete2(
39236c6e
A		 2686 struct socket *so,
2687 struct mbuf *m,
2688 const struct sadb_msghdr *mhp)
1c79356b 2689{
1c79356b
A		 2690 u_int32_t id;
2691 struct secpolicy *sp;
39236c6e 2692
2d21ac55
A		 2693 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2694
1c79356b 2695 /* sanity check */
9bccf70c 2696 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 2697 panic("key_spddelete2: NULL pointer is passed.\n");
39236c6e 2698
9bccf70c
A		 2699 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2700 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
55e303ae 2701 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
9bccf70c
A		 2702 key_senderror(so, m, EINVAL);
2703 return 0;
1c79356b 2704 }
39236c6e 2705
316670eb 2706 id = ((struct sadb_x_policy *)
39236c6e
A		 2707 (void *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2708
1c79356b 2709 /* Is there SP in SPD ? */
2d21ac55 2710 lck_mtx_lock(sadb_mutex);
39236c6e 2711 if ((sp = __key_getspbyid(id)) == NULL) {
2d21ac55 2712 lck_mtx_unlock(sadb_mutex);
55e303ae 2713 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2d21ac55 2714 return key_senderror(so, m, EINVAL);
1c79356b 2715 }
39236c6e 2716
1c79356b 2717 sp->state = IPSEC_SPSTATE_DEAD;
2d21ac55
A		 2718 key_freesp(sp, KEY_SADB_LOCKED);
2719 lck_mtx_unlock(sadb_mutex);
39236c6e 2720
1c79356b 2721 {
39236c6e
A		 2722 struct mbuf *n, *nn;
2723 struct sadb_msg *newmsg;
2724 int off, len;
2725
2726 /* create new sadb_msg to reply. */
2727 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2728
2729 if (len > MCLBYTES)
2730 return key_senderror(so, m, ENOBUFS);
2731 MGETHDR(n, M_WAITOK, MT_DATA);
2732 if (n && len > MHLEN) {
2733 MCLGET(n, M_WAITOK);
2734 if ((n->m_flags & M_EXT) == 0) {
2735 m_freem(n);
2736 n = NULL;
2737 }
9bccf70c 2738 }
39236c6e
A		 2739 if (!n)
2740 return key_senderror(so, m, ENOBUFS);
2741
2742 n->m_len = len;
2743 n->m_next = NULL;
2744 off = 0;
2745
2746 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2747 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2748
9bccf70c 2749#if DIAGNOSTIC
39236c6e
A		 2750 if (off != len)
2751 panic("length inconsistency in key_spddelete2");
1c79356b 2752#endif
39236c6e
A		 2753
2754 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2755 mhp->extlen[SADB_X_EXT_POLICY], M_WAITOK);
2756 if (!n->m_next) {
2757 m_freem(n);
2758 return key_senderror(so, m, ENOBUFS);
2759 }
2760
2761 n->m_pkthdr.len = 0;
2762 for (nn = n; nn; nn = nn->m_next)
2763 n->m_pkthdr.len += nn->m_len;
2764
2765 newmsg = mtod(n, struct sadb_msg *);
2766 newmsg->sadb_msg_errno = 0;
2767 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2768
2769 m_freem(m);
2770 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2771 }
2772}
9bccf70c 2773
39236c6e
A		 2774static int
2775key_spdenable(
2776 struct socket *so,
2777 struct mbuf *m,
2778 const struct sadb_msghdr *mhp)
2779{
2780 u_int32_t id;
2781 struct secpolicy *sp;
2782
2783 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2784
2785 /* sanity check */
2786 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2787 panic("key_spdenable: NULL pointer is passed.\n");
2788
2789 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2790 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2791 ipseclog((LOG_DEBUG, "key_spdenable: invalid message is passed.\n"));
2792 key_senderror(so, m, EINVAL);
2793 return 0;
2794 }
2795
2796 id = ((struct sadb_x_policy *)
2797 (void *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2798
2799 /* Is there SP in SPD ? */
2800 lck_mtx_lock(sadb_mutex);
2801 if ((sp = __key_getspbyid(id)) == NULL) {
2802 lck_mtx_unlock(sadb_mutex);
2803 ipseclog((LOG_DEBUG, "key_spdenable: no SP found id:%u.\n", id));
2804 return key_senderror(so, m, EINVAL);
2805 }
2806
2807 sp->disabled = 0;
2808 lck_mtx_unlock(sadb_mutex);
2809
2810 {
2811 struct mbuf *n;
2812 struct sadb_msg *newmsg;
2813 int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY};
2814
2815 /* create new sadb_msg to reply. */
2816 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
2817 if (!n)
2818 return key_senderror(so, m, ENOBUFS);
2819
2820 if (n->m_len < sizeof(struct sadb_msg)) {
2821 n = m_pullup(n, sizeof(struct sadb_msg));
2822 if (n == NULL)
2823 return key_senderror(so, m, ENOBUFS);
2824 }
2825 newmsg = mtod(n, struct sadb_msg *);
2826 newmsg->sadb_msg_errno = 0;
2827 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2828
2829 m_freem(m);
2830 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2831 }
2832}
1c79356b 2833
39236c6e
A		 2834static int
2835key_spddisable(
2836 struct socket *so,
2837 struct mbuf *m,
2838 const struct sadb_msghdr *mhp)
2839{
2840 u_int32_t id;
2841 struct secpolicy *sp;
2842
2843 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2844
2845 /* sanity check */
2846 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2847 panic("key_spddisable: NULL pointer is passed.\n");
2848
2849 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2850 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2851 ipseclog((LOG_DEBUG, "key_spddisable: invalid message is passed.\n"));
2852 key_senderror(so, m, EINVAL);
2853 return 0;
2854 }
2855
2856 id = ((struct sadb_x_policy *)
2857 (void *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2858
2859 /* Is there SP in SPD ? */
2860 lck_mtx_lock(sadb_mutex);
2861 if ((sp = __key_getspbyid(id)) == NULL) {
2862 lck_mtx_unlock(sadb_mutex);
2863 ipseclog((LOG_DEBUG, "key_spddisable: no SP found id:%u.\n", id));
2864 return key_senderror(so, m, EINVAL);
2865 }
2866
2867 sp->disabled = 1;
2868 lck_mtx_unlock(sadb_mutex);
2869
2870 {
2871 struct mbuf *n;
2872 struct sadb_msg *newmsg;
2873 int mbufItems[] = {SADB_EXT_RESERVED, SADB_X_EXT_POLICY};
2874
2875 /* create new sadb_msg to reply. */
2876 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
2877 if (!n)
2878 return key_senderror(so, m, ENOBUFS);
2879
2880 if (n->m_len < sizeof(struct sadb_msg)) {
2881 n = m_pullup(n, sizeof(struct sadb_msg));
2882 if (n == NULL)
2883 return key_senderror(so, m, ENOBUFS);
2884 }
2885 newmsg = mtod(n, struct sadb_msg *);
2886 newmsg->sadb_msg_errno = 0;
2887 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2888
2889 m_freem(m);
2890 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1c79356b
A		 2891 }
2892}
2893
2894/*
2895 * SADB_X_GET processing
2896 * receive
2897 * <base, policy(*)>
2898 * from the user(?),
2899 * and send,
2900 * <base, address(SD), policy>
2901 * to the ikmpd.
2902 * policy(*) including direction of policy.
2903 *
9bccf70c 2904 * m will always be freed.
1c79356b
A		 2905 */
2906static int
6d2010ae 2907key_spdget(
39236c6e
A		 2908 struct socket *so,
2909 struct mbuf *m,
2910 const struct sadb_msghdr *mhp)
1c79356b 2911{
1c79356b
A		 2912 u_int32_t id;
2913 struct secpolicy *sp;
9bccf70c 2914 struct mbuf *n;
39236c6e 2915
2d21ac55
A		 2916 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2917
1c79356b 2918 /* sanity check */
9bccf70c 2919 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 2920 panic("key_spdget: NULL pointer is passed.\n");
39236c6e 2921
9bccf70c
A		 2922 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2923 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
55e303ae 2924 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
9bccf70c 2925 return key_senderror(so, m, EINVAL);
1c79356b 2926 }
39236c6e 2927
316670eb 2928 id = ((struct sadb_x_policy *)
39236c6e
A		 2929 (void *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2930
1c79356b 2931 /* Is there SP in SPD ? */
2d21ac55 2932 lck_mtx_lock(sadb_mutex);
39236c6e 2933 if ((sp = __key_getspbyid(id)) == NULL) {
55e303ae 2934 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2d21ac55 2935 lck_mtx_unlock(sadb_mutex);
9bccf70c 2936 return key_senderror(so, m, ENOENT);
1c79356b 2937 }
2d21ac55 2938 lck_mtx_unlock(sadb_mutex);
9bccf70c
A		 2939 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2940 if (n != NULL) {
2941 m_freem(m);
2942 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2943 } else
2944 return key_senderror(so, m, ENOBUFS);
1c79356b
A		 2945}
2946
2947/*
2948 * SADB_X_SPDACQUIRE processing.
2949 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2950 * send
2951 * <base, policy(*)>
2952 * to KMD, and expect to receive
91447636 2953 * <base> with SADB_X_SPDACQUIRE if error occurred,
1c79356b
A		 2954 * or
2955 * <base, policy>
2956 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2957 * policy(*) is without policy requests.
2958 *
2959 * 0 : succeed
2960 * others: error number
2961 */
2962int
6d2010ae 2963key_spdacquire(
39236c6e 2964 struct secpolicy *sp)
1c79356b 2965{
9bccf70c 2966 struct mbuf *result = NULL, *m;
1c79356b
A		 2967 struct secspacq *newspacq;
2968 int error;
39236c6e 2969
2d21ac55
A		 2970 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
2971
1c79356b
A		 2972 /* sanity check */
2973 if (sp == NULL)
2974 panic("key_spdacquire: NULL pointer is passed.\n");
2975 if (sp->req != NULL)
2976 panic("key_spdacquire: called but there is request.\n");
2977 if (sp->policy != IPSEC_POLICY_IPSEC)
2978 panic("key_spdacquire: policy mismathed. IPsec is expected.\n");
39236c6e 2979
1c79356b 2980 /* get a entry to check whether sent message or not. */
2d21ac55 2981 lck_mtx_lock(sadb_mutex);
1c79356b
A		 2982 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2983 if (key_blockacq_count < newspacq->count) {
2984 /* reset counter and do send message. */
2985 newspacq->count = 0;
2986 } else {
2987 /* increment counter and do nothing. */
2988 newspacq->count++;
2d21ac55 2989 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 2990 return 0;
2991 }
2992 } else {
2993 /* make new entry for blocking to send SADB_ACQUIRE. */
2d21ac55
A		 2994 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) {
2995 lck_mtx_unlock(sadb_mutex);
1c79356b 2996 return ENOBUFS;
2d21ac55 2997 }
1c79356b
A		 2998 /* add to acqtree */
2999 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
39236c6e 3000 key_start_timehandler();
1c79356b 3001 }
2d21ac55 3002 lck_mtx_unlock(sadb_mutex);
1c79356b 3003 /* create new sadb_msg to reply. */
9bccf70c
A		 3004 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
3005 if (!m) {
3006 error = ENOBUFS;
3007 goto fail;
1c79356b 3008 }
9bccf70c 3009 result = m;
39236c6e 3010
9bccf70c
A		 3011 result->m_pkthdr.len = 0;
3012 for (m = result; m; m = m->m_next)
3013 result->m_pkthdr.len += m->m_len;
39236c6e 3014
9bccf70c 3015 mtod(result, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 3016 PFKEY_UNIT64(result->m_pkthdr.len);
3017
9bccf70c 3018 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
39236c6e 3019
9bccf70c
A		 3020fail:
3021 if (result)
3022 m_freem(result);
3023 return error;
3024}
3025
3026/*
1c79356b
A		 3027 * SADB_SPDFLUSH processing
3028 * receive
3029 * <base>
3030 * from the user, and free all entries in secpctree.
3031 * and send,
3032 * <base>
3033 * to the user.
3034 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
3035 *
9bccf70c 3036 * m will always be freed.
1c79356b 3037 */
9bccf70c 3038static int
6d2010ae 3039key_spdflush(
39236c6e
A		 3040 struct socket *so,
3041 struct mbuf *m,
3042 const struct sadb_msghdr *mhp)
1c79356b 3043{
9bccf70c 3044 struct sadb_msg *newmsg;
1c79356b
A		 3045 struct secpolicy *sp;
3046 u_int dir;
2d21ac55 3047
1c79356b 3048 /* sanity check */
9bccf70c 3049 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 3050 panic("key_spdflush: NULL pointer is passed.\n");
39236c6e 3051
9bccf70c
A		 3052 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
3053 return key_senderror(so, m, EINVAL);
39236c6e 3054
2d21ac55 3055 lck_mtx_lock(sadb_mutex);
1c79356b
A		 3056 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
3057 LIST_FOREACH(sp, &sptree[dir], chain) {
3058 sp->state = IPSEC_SPSTATE_DEAD;
3059 }
3060 }
2d21ac55
A		 3061 lck_mtx_unlock(sadb_mutex);
3062
9bccf70c 3063 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
55e303ae 3064 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
9bccf70c 3065 return key_senderror(so, m, ENOBUFS);
1c79356b 3066 }
39236c6e 3067
9bccf70c
A		 3068 if (m->m_next)
3069 m_freem(m->m_next);
3070 m->m_next = NULL;
3071 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3072 newmsg = mtod(m, struct sadb_msg *);
1c79356b 3073 newmsg->sadb_msg_errno = 0;
9bccf70c 3074 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
39236c6e 3075
9bccf70c 3076 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
1c79356b
A		 3077}
3078
3079/*
3080 * SADB_SPDDUMP processing
3081 * receive
3082 * <base>
3083 * from the user, and dump all SP leaves
3084 * and send,
3085 * <base> .....
3086 * to the ikmpd.
3087 *
9bccf70c 3088 * m will always be freed.
1c79356b 3089 */
39236c6e 3090
1c79356b 3091static int
6d2010ae 3092key_spddump(
39236c6e
A		 3093 struct socket *so,
3094 struct mbuf *m,
3095 const struct sadb_msghdr *mhp)
1c79356b 3096{
2d21ac55
A		 3097 struct secpolicy *sp, **spbuf = NULL, **sp_ptr;
3098 int cnt = 0, bufcount;
1c79356b 3099 u_int dir;
9bccf70c 3100 struct mbuf *n;
2d21ac55
A		 3101 int error = 0;
3102
1c79356b 3103 /* sanity check */
9bccf70c 3104 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 3105 panic("key_spddump: NULL pointer is passed.\n");
39236c6e 3106
2d21ac55
A		 3107 if ((bufcount = ipsec_policy_count) == 0) {
3108 error = ENOENT;
3109 goto end;
3110 }
3111 bufcount += 256; /* extra */
3112 KMALLOC_WAIT(spbuf, struct secpolicy**, bufcount * sizeof(struct secpolicy*));
3113 if (spbuf == NULL) {
3114 ipseclog((LOG_DEBUG, "key_spddump: No more memory.\n"));
3115 error = ENOMEM;
3116 goto end;
3117 }
3118 lck_mtx_lock(sadb_mutex);
3119 /* search SPD entry, make list. */
3120 sp_ptr = spbuf;
1c79356b
A		 3121 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
3122 LIST_FOREACH(sp, &sptree[dir], chain) {
39236c6e 3123 if (cnt == bufcount)
2d21ac55
A		 3124 break; /* buffer full */
3125 *sp_ptr++ = sp;
3126 sp->refcnt++;
1c79356b
A		 3127 cnt++;
3128 }
3129 }
2d21ac55 3130 lck_mtx_unlock(sadb_mutex);
39236c6e 3131
2d21ac55
A		 3132 if (cnt == 0) {
3133 error = ENOENT;
3134 goto end;
3135 }
3136
3137 sp_ptr = spbuf;
3138 while (cnt) {
3139 --cnt;
3140 n = key_setdumpsp(*sp_ptr++, SADB_X_SPDDUMP, cnt,
39236c6e
A		 3141 mhp->msg->sadb_msg_pid);
3142
2d21ac55
A		 3143 if (n)
3144 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
1c79356b 3145 }
2d21ac55
A		 3146
3147 lck_mtx_lock(sadb_mutex);
3148 while (sp_ptr > spbuf)
3149 key_freesp(*(--sp_ptr), KEY_SADB_LOCKED);
3150 lck_mtx_unlock(sadb_mutex);
3151
39236c6e 3152end:
2d21ac55
A		 3153 if (spbuf)
3154 KFREE(spbuf);
3155 if (error)
3156 return key_senderror(so, m, error);
39236c6e 3157
9bccf70c 3158 m_freem(m);
1c79356b 3159 return 0;
39236c6e 3160
1c79356b
A		 3161}
3162
3163static struct mbuf *
6d2010ae 3164key_setdumpsp(
39236c6e
A		 3165 struct secpolicy *sp,
3166 u_int8_t type,
3167 u_int32_t seq,
3168 u_int32_t pid)
1c79356b 3169{
9bccf70c 3170 struct mbuf *result = NULL, *m;
39236c6e 3171
9bccf70c
A		 3172 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
3173 if (!m)
3174 goto fail;
3175 result = m;
39236c6e
A		 3176
3177 if (sp->spidx.src_range.start.ss_len > 0) {
3178 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_SRC_START,
3179 (struct sockaddr *)&sp->spidx.src_range.start, sp->spidx.prefs,
3180 sp->spidx.ul_proto);
3181 if (!m)
3182 goto fail;
3183 m_cat(result, m);
3184
3185 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_SRC_END,
3186 (struct sockaddr *)&sp->spidx.src_range.end, sp->spidx.prefs,
3187 sp->spidx.ul_proto);
3188 if (!m)
3189 goto fail;
3190 m_cat(result, m);
3191 } else {
3192 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3193 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
3194 sp->spidx.ul_proto);
3195 if (!m)
3196 goto fail;
3197 m_cat(result, m);
3198 }
3199
3200 if (sp->spidx.dst_range.start.ss_len > 0) {
3201 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_DST_START,
3202 (struct sockaddr *)&sp->spidx.dst_range.start, sp->spidx.prefd,
3203 sp->spidx.ul_proto);
3204 if (!m)
3205 goto fail;
3206 m_cat(result, m);
3207
3208 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_DST_END,
3209 (struct sockaddr *)&sp->spidx.dst_range.end, sp->spidx.prefd,
3210 sp->spidx.ul_proto);
3211 if (!m)
3212 goto fail;
3213 m_cat(result, m);
3214 } else {
3215 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3216 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
3217 sp->spidx.ul_proto);
3218 if (!m)
3219 goto fail;
3220 m_cat(result, m);
3221 }
3222
3223 if (sp->spidx.internal_if || sp->outgoing_if || sp->ipsec_if || sp->disabled) {
3224 m = key_setsadbipsecif(sp->spidx.internal_if, sp->outgoing_if, sp->ipsec_if, sp->disabled);
3225 if (!m)
3226 goto fail;
3227 m_cat(result, m);
3228 }
3229
9bccf70c
A		 3230 m = key_sp2msg(sp);
3231 if (!m)
3232 goto fail;
3233 m_cat(result, m);
39236c6e 3234
9bccf70c
A		 3235 if ((result->m_flags & M_PKTHDR) == 0)
3236 goto fail;
39236c6e 3237
9bccf70c
A		 3238 if (result->m_len < sizeof(struct sadb_msg)) {
3239 result = m_pullup(result, sizeof(struct sadb_msg));
3240 if (result == NULL)
3241 goto fail;
1c79356b 3242 }
39236c6e 3243
9bccf70c
A		 3244 result->m_pkthdr.len = 0;
3245 for (m = result; m; m = m->m_next)
3246 result->m_pkthdr.len += m->m_len;
39236c6e 3247
9bccf70c 3248 mtod(result, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 3249 PFKEY_UNIT64(result->m_pkthdr.len);
3250
9bccf70c 3251 return result;
39236c6e 3252
9bccf70c
A		 3253fail:
3254 m_freem(result);
3255 return NULL;
1c79356b
A		 3256}
3257
3258/*
3259 * get PFKEY message length for security policy and request.
3260 */
3261static u_int
6d2010ae 3262key_getspreqmsglen(
39236c6e 3263 struct secpolicy *sp)
1c79356b
A		 3264{
3265 u_int tlen;
39236c6e 3266
1c79356b 3267 tlen = sizeof(struct sadb_x_policy);
39236c6e 3268
1c79356b
A		 3269 /* if is the policy for ipsec ? */
3270 if (sp->policy != IPSEC_POLICY_IPSEC)
3271 return tlen;
39236c6e 3272
1c79356b
A		 3273 /* get length of ipsec requests */
3274 {
39236c6e
A		 3275 struct ipsecrequest *isr;
3276 int len;
3277
3278 for (isr = sp->req; isr != NULL; isr = isr->next) {
3279 len = sizeof(struct sadb_x_ipsecrequest)
1c79356b
A		 3280 + isr->saidx.src.ss_len
3281 + isr->saidx.dst.ss_len;
39236c6e
A		 3282
3283 tlen += PFKEY_ALIGN8(len);
3284 }
1c79356b 3285 }
39236c6e 3286
1c79356b
A		 3287 return tlen;
3288}
3289
9bccf70c
A		 3290/*
3291 * SADB_SPDEXPIRE processing
3292 * send
3293 * <base, address(SD), lifetime(CH), policy>
3294 * to KMD by PF_KEY.
3295 *
3296 * OUT: 0 : succeed
3297 * others : error number
3298 */
3299static int
6d2010ae 3300key_spdexpire(
39236c6e 3301 struct secpolicy *sp)
9bccf70c 3302{
9bccf70c
A		 3303 struct mbuf *result = NULL, *m;
3304 int len;
6d2010ae 3305 int error = EINVAL;
9bccf70c 3306 struct sadb_lifetime *lt;
39236c6e 3307
2d21ac55
A		 3308 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
3309
9bccf70c
A		 3310 /* sanity check */
3311 if (sp == NULL)
3312 panic("key_spdexpire: NULL pointer is passed.\n");
39236c6e 3313
9bccf70c
A		 3314 /* set msg header */
3315 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
3316 if (!m) {
3317 error = ENOBUFS;
3318 goto fail;
3319 }
3320 result = m;
39236c6e 3321
9bccf70c
A		 3322 /* create lifetime extension (current and hard) */
3323 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
3324 m = key_alloc_mbuf(len);
3325 if (!m || m->m_next) { /*XXX*/
3326 if (m)
3327 m_freem(m);
3328 error = ENOBUFS;
3329 goto fail;
3330 }
3331 bzero(mtod(m, caddr_t), len);
3332 lt = mtod(m, struct sadb_lifetime *);
3333 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3334 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3335 lt->sadb_lifetime_allocations = 0;
3336 lt->sadb_lifetime_bytes = 0;
3337 lt->sadb_lifetime_addtime = sp->created;
3338 lt->sadb_lifetime_usetime = sp->lastused;
316670eb 3339 lt = (struct sadb_lifetime *)(void *)(mtod(m, caddr_t) + len / 2);
9bccf70c
A		 3340 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3341 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
3342 lt->sadb_lifetime_allocations = 0;
3343 lt->sadb_lifetime_bytes = 0;
3344 lt->sadb_lifetime_addtime = sp->lifetime;
3345 lt->sadb_lifetime_usetime = sp->validtime;
3346 m_cat(result, m);
39236c6e
A		 3347
3348 /* set sadb_address(es) for source */
3349 if (sp->spidx.src_range.start.ss_len > 0) {
3350 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_SRC_START,
3351 (struct sockaddr *)&sp->spidx.src_range.start, sp->spidx.prefs,
3352 sp->spidx.ul_proto);
3353 if (!m) {
3354 error = ENOBUFS;
3355 goto fail;
3356 }
3357 m_cat(result, m);
3358
3359 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_SRC_END,
3360 (struct sockaddr *)&sp->spidx.src_range.end, sp->spidx.prefs,
3361 sp->spidx.ul_proto);
3362 if (!m) {
3363 error = ENOBUFS;
3364 goto fail;
3365 }
3366 m_cat(result, m);
3367 } else {
3368 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3369 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
3370 sp->spidx.ul_proto);
3371 if (!m) {
3372 error = ENOBUFS;
3373 goto fail;
3374 }
3375 m_cat(result, m);
3376 }
3377
3378 /* set sadb_address(es) for dest */
3379 if (sp->spidx.dst_range.start.ss_len > 0) {
3380 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_DST_START,
3381 (struct sockaddr *)&sp->spidx.dst_range.start, sp->spidx.prefd,
3382 sp->spidx.ul_proto);
3383 if (!m) {
3384 error = ENOBUFS;
3385 goto fail;
3386 }
3387 m_cat(result, m);
3388
3389 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_DST_END,
3390 (struct sockaddr *)&sp->spidx.dst_range.end, sp->spidx.prefd,
3391 sp->spidx.ul_proto);
3392 if (!m) {
3393 error = ENOBUFS;
3394 goto fail;
3395 }
3396 m_cat(result, m);
3397 } else {
3398 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3399 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
3400 sp->spidx.ul_proto);
3401 if (!m) {
3402 error = ENOBUFS;
3403 goto fail;
3404 }
3405 m_cat(result, m);
3406 }
3407
9bccf70c
A		 3408 /* set secpolicy */
3409 m = key_sp2msg(sp);
3410 if (!m) {
3411 error = ENOBUFS;
3412 goto fail;
3413 }
3414 m_cat(result, m);
39236c6e 3415
9bccf70c
A		 3416 if ((result->m_flags & M_PKTHDR) == 0) {
3417 error = EINVAL;
3418 goto fail;
3419 }
39236c6e 3420
9bccf70c
A		 3421 if (result->m_len < sizeof(struct sadb_msg)) {
3422 result = m_pullup(result, sizeof(struct sadb_msg));
3423 if (result == NULL) {
3424 error = ENOBUFS;
3425 goto fail;
3426 }
3427 }
39236c6e 3428
9bccf70c
A		 3429 result->m_pkthdr.len = 0;
3430 for (m = result; m; m = m->m_next)
3431 result->m_pkthdr.len += m->m_len;
39236c6e 3432
9bccf70c 3433 mtod(result, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 3434 PFKEY_UNIT64(result->m_pkthdr.len);
3435
9bccf70c 3436 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
39236c6e
A		 3437
3438fail:
9bccf70c
A		 3439 if (result)
3440 m_freem(result);
9bccf70c
A		 3441 return error;
3442}
3443
1c79356b
A		 3444/* %%% SAD management */
3445/*
3446 * allocating a memory for new SA head, and copy from the values of mhp.
3447 * OUT: NULL : failure due to the lack of memory.
3448 * others : pointer to new SA head.
3449 */
3450static struct secashead *
fe8ab488
A		 3451key_newsah(struct secasindex *saidx,
3452 ifnet_t ipsec_if,
3453 u_int outgoing_if,
3454 u_int8_t dir)
1c79356b
A		 3455{
3456 struct secashead *newsah;
39236c6e 3457
1c79356b
A		 3458 /* sanity check */
3459 if (saidx == NULL)
3460 panic("key_newsaidx: NULL pointer is passed.\n");
39236c6e 3461
1c79356b
A		 3462 newsah = keydb_newsecashead();
3463 if (newsah == NULL)
3464 return NULL;
39236c6e 3465
1c79356b 3466 bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
2d21ac55
A		 3467
3468 /* remove the ports */
3469 switch (saidx->src.ss_family) {
39236c6e 3470 case AF_INET:
2d21ac55
A		 3471 ((struct sockaddr_in *)(&newsah->saidx.src))->sin_port = IPSEC_PORT_ANY;
3472 break;
39236c6e
A		 3473 case AF_INET6:
3474 ((struct sockaddr_in6 *)(&newsah->saidx.src))->sin6_port = IPSEC_PORT_ANY;
2d21ac55 3475 break;
39236c6e 3476 default:
2d21ac55
A		 3477 break;
3478 }
3479 switch (saidx->dst.ss_family) {
39236c6e
A		 3480 case AF_INET:
3481 ((struct sockaddr_in *)(&newsah->saidx.dst))->sin_port = IPSEC_PORT_ANY;
2d21ac55 3482 break;
39236c6e 3483 case AF_INET6:
2d21ac55
A		 3484 ((struct sockaddr_in6 *)(&newsah->saidx.dst))->sin6_port = IPSEC_PORT_ANY;
3485 break;
39236c6e 3486 default:
2d21ac55 3487 break;
39236c6e
A		 3488 }
3489
fe8ab488
A		 3490 newsah->outgoing_if = outgoing_if;
3491 if (ipsec_if) {
3492 ifnet_reference(ipsec_if);
3493 newsah->ipsec_if = ipsec_if;
3494 }
b0d623f7 3495 newsah->dir = dir;
1c79356b
A		 3496 /* add to saidxtree */
3497 newsah->state = SADB_SASTATE_MATURE;
3498 LIST_INSERT_HEAD(&sahtree, newsah, chain);
39236c6e 3499 key_start_timehandler();
fe8ab488 3500
1c79356b
A		 3501 return(newsah);
3502}
3503
3504/*
3505 * delete SA index and all SA registerd.
3506 */
316670eb 3507void
6d2010ae 3508key_delsah(
39236c6e 3509 struct secashead *sah)
1c79356b
A		 3510{
3511 struct secasvar *sav, *nextsav;
3512 u_int stateidx, state;
1c79356b 3513 int zombie = 0;
39236c6e 3514
91447636 3515 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 3516
1c79356b
A		 3517 /* sanity check */
3518 if (sah == NULL)
3519 panic("key_delsah: NULL pointer is passed.\n");
39236c6e 3520
1c79356b
A		 3521 /* searching all SA registerd in the secindex. */
3522 for (stateidx = 0;
3523 stateidx < _ARRAYLEN(saorder_state_any);
3524 stateidx++) {
39236c6e 3525
1c79356b
A		 3526 state = saorder_state_any[stateidx];
3527 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
3528 sav != NULL;
3529 sav = nextsav) {
39236c6e 3530
1c79356b 3531 nextsav = LIST_NEXT(sav, chain);
39236c6e 3532
1c79356b
A		 3533 if (sav->refcnt > 0) {
3534 /* give up to delete this sa */
3535 zombie++;
3536 continue;
3537 }
39236c6e 3538
1c79356b
A		 3539 /* sanity check */
3540 KEY_CHKSASTATE(state, sav->state, "key_delsah");
39236c6e 3541
2d21ac55 3542 key_freesav(sav, KEY_SADB_LOCKED);
39236c6e 3543
1c79356b
A		 3544 /* remove back pointer */
3545 sav->sah = NULL;
3546 sav = NULL;
3547 }
3548 }
39236c6e 3549
1c79356b 3550 /* don't delete sah only if there are savs. */
2d21ac55 3551 if (zombie)
1c79356b 3552 return;
39236c6e
A		 3553
3554 ROUTE_RELEASE(&sah->sa_route);
3555
fe8ab488
A		 3556 if (sah->ipsec_if) {
3557 ifnet_release(sah->ipsec_if);
3558 sah->ipsec_if = NULL;
3559 }
3560
39236c6e
A		 3561 if (sah->idents) {
3562 KFREE(sah->idents);
3563 }
3564
3565 if (sah->identd) {
3566 KFREE(sah->identd);
3567 }
3568
1c79356b
A		 3569 /* remove from tree of SA index */
3570 if (__LIST_CHAINED(sah))
3571 LIST_REMOVE(sah, chain);
39236c6e 3572
1c79356b 3573 KFREE(sah);
39236c6e 3574
1c79356b
A		 3575 return;
3576}
3577
3578/*
3579 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
3580 * and copy the values of mhp into new buffer.
3581 * When SAD message type is GETSPI:
3582 * to set sequence number from acq_seq++,
3583 * to set zero to SPI.
3584 * not to call key_setsava().
3585 * OUT: NULL : fail
3586 * others : pointer to new secasvar.
9bccf70c
A		 3587 *
3588 * does not modify mbuf. does not free mbuf on error.
1c79356b
A		 3589 */
3590static struct secasvar *
6d2010ae 3591key_newsav(
39236c6e
A		 3592 struct mbuf *m,
3593 const struct sadb_msghdr *mhp,
3594 struct secashead *sah,
fe8ab488
A		 3595 int *errp,
3596 struct socket *so)
1c79356b
A		 3597{
3598 struct secasvar *newsav;
9bccf70c 3599 const struct sadb_sa *xsa;
39236c6e 3600
91447636 3601 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 3602
1c79356b 3603 /* sanity check */
9bccf70c 3604 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
1c79356b 3605 panic("key_newsa: NULL pointer is passed.\n");
39236c6e 3606
2d21ac55 3607 KMALLOC_NOWAIT(newsav, struct secasvar *, sizeof(struct secasvar));
1c79356b 3608 if (newsav == NULL) {
2d21ac55
A		 3609 lck_mtx_unlock(sadb_mutex);
3610 KMALLOC_WAIT(newsav, struct secasvar *, sizeof(struct secasvar));
3611 lck_mtx_lock(sadb_mutex);
3612 if (newsav == NULL) {
3613 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
3614 *errp = ENOBUFS;
3615 return NULL;
3616 }
1c79356b
A		 3617 }
3618 bzero((caddr_t)newsav, sizeof(struct secasvar));
39236c6e 3619
9bccf70c 3620 switch (mhp->msg->sadb_msg_type) {
39236c6e
A		 3621 case SADB_GETSPI:
3622 key_setspi(newsav, 0);
3623
1c79356b 3624#if IPSEC_DOSEQCHECK
39236c6e
A		 3625 /* sync sequence number */
3626 if (mhp->msg->sadb_msg_seq == 0)
3627 newsav->seq =
1c79356b 3628 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
39236c6e 3629 else
1c79356b 3630#endif
39236c6e
A		 3631 newsav->seq = mhp->msg->sadb_msg_seq;
3632 break;
3633
3634 case SADB_ADD:
3635 /* sanity check */
3636 if (mhp->ext[SADB_EXT_SA] == NULL) {
fe8ab488 3637 key_delsav(newsav);
39236c6e
A		 3638 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
3639 *errp = EINVAL;
3640 return NULL;
3641 }
3642 xsa = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
3643 key_setspi(newsav, xsa->sadb_sa_spi);
9bccf70c 3644 newsav->seq = mhp->msg->sadb_msg_seq;
39236c6e
A		 3645 break;
3646 default:
fe8ab488 3647 key_delsav(newsav);
9bccf70c 3648 *errp = EINVAL;
1c79356b 3649 return NULL;
1c79356b 3650 }
39236c6e
A		 3651
3652 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
3653 if (((struct sadb_x_sa2 *)(void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_alwaysexpire)
3654 newsav->always_expire = 1;
fe8ab488
A		 3655 newsav->flags2 = ((struct sadb_x_sa2 *)(void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_flags;
3656 if (newsav->flags2 & SADB_X_EXT_SA2_DELETE_ON_DETACH) {
3657 newsav->so = so;
3658 }
39236c6e
A		 3659 }
3660
1c79356b 3661 /* copy sav values */
9bccf70c
A		 3662 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
3663 *errp = key_setsaval(newsav, m, mhp);
3664 if (*errp) {
fe8ab488 3665 key_delsav(newsav);
9bccf70c
A		 3666 return NULL;
3667 }
39236c6e
A		 3668 } else {
3669 /* For get SPI, if has a hard lifetime, apply */
3670 const struct sadb_lifetime *lft0;
3671 struct timeval tv;
3672
3673 lft0 = (struct sadb_lifetime *)(void *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3674 if (lft0 != NULL) {
3675 /* make lifetime for CURRENT */
3676 KMALLOC_NOWAIT(newsav->lft_c, struct sadb_lifetime *,
3677 sizeof(struct sadb_lifetime));
3678 if (newsav->lft_c == NULL) {
3679 lck_mtx_unlock(sadb_mutex);
3680 KMALLOC_WAIT(newsav->lft_c, struct sadb_lifetime *,
3681 sizeof(struct sadb_lifetime));
3682 lck_mtx_lock(sadb_mutex);
3683 if (newsav->lft_c == NULL) {
3684 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
fe8ab488 3685 key_delsav(newsav);
39236c6e
A		 3686 *errp = ENOBUFS;
3687 return NULL;
3688 }
3689 }
3690
3691 microtime(&tv);
3692
3693 newsav->lft_c->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3694 newsav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3695 newsav->lft_c->sadb_lifetime_allocations = 0;
3696 newsav->lft_c->sadb_lifetime_bytes = 0;
3697 newsav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
3698 newsav->lft_c->sadb_lifetime_usetime = 0;
3699
3700 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3701 ipseclog((LOG_DEBUG, "key_newsa: invalid hard lifetime ext len.\n"));
fe8ab488 3702 key_delsav(newsav);
39236c6e
A		 3703 *errp = EINVAL;
3704 return NULL;
3705 }
3706 newsav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0, sizeof(*lft0));
3707 if (newsav->lft_h == NULL) {
3708 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
fe8ab488 3709 key_delsav(newsav);
39236c6e
A		 3710 *errp = ENOBUFS;
3711 return NULL;
3712 }
3713 }
1c79356b 3714 }
39236c6e 3715
9bccf70c
A		 3716 /* reset created */
3717 {
39236c6e
A		 3718 struct timeval tv;
3719 microtime(&tv);
3720 newsav->created = tv.tv_sec;
9bccf70c 3721 }
39236c6e 3722
9bccf70c 3723 newsav->pid = mhp->msg->sadb_msg_pid;
39236c6e 3724
1c79356b
A		 3725 /* add to satree */
3726 newsav->sah = sah;
3727 newsav->refcnt = 1;
3728 newsav->state = SADB_SASTATE_LARVAL;
3729 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
39236c6e 3730 secasvar, chain);
2d21ac55 3731 ipsec_sav_count++;
39236c6e 3732
1c79356b
A		 3733 return newsav;
3734}
3735
316670eb
A		 3736/*
3737 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
3738 * and copy the values passed into new buffer.
3739 * When SAD message type is GETSPI:
3740 * to set sequence number from acq_seq++,
3741 * to set zero to SPI.
3742 * not to call key_setsava().
3743 * OUT: NULL : fail
3744 * others : pointer to new secasvar.
3745 */
3746struct secasvar *
3747key_newsav2(struct secashead *sah,
3748 u_int8_t satype,
3749 u_int8_t alg_auth,
3750 u_int8_t alg_enc,
3751 u_int32_t flags,
3752 u_int8_t replay,
3753 struct sadb_key *key_auth,
3754 u_int16_t key_auth_len,
3755 struct sadb_key *key_enc,
3756 u_int16_t key_enc_len,
3757 u_int16_t natt_port,
3758 u_int32_t seq,
3759 u_int32_t spi,
3760 u_int32_t pid,
3761 struct sadb_lifetime *lifetime_hard,
3762 struct sadb_lifetime *lifetime_soft)
3763{
3764 struct secasvar *newsav;
3765
3766 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
3767
3768 /* sanity check */
3769 if (sah == NULL)
3770 panic("key_newsa: NULL pointer is passed.\n");
3771
3772 KMALLOC_NOWAIT(newsav, struct secasvar *, sizeof(struct secasvar));
3773 if (newsav == NULL) {
3774 lck_mtx_unlock(sadb_mutex);
3775 KMALLOC_WAIT(newsav, struct secasvar *, sizeof(struct secasvar));
3776 lck_mtx_lock(sadb_mutex);
3777 if (newsav == NULL) {
3778 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
3779 return NULL;
3780 }
3781 }
3782 bzero((caddr_t)newsav, sizeof(struct secasvar));
39236c6e 3783
316670eb
A		 3784#if IPSEC_DOSEQCHECK
3785 /* sync sequence number */
3786 if (seq == 0)
3787 newsav->seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
3788 else
3789#endif
3790 newsav->seq = seq;
3791 key_setspi(newsav, spi);
39236c6e 3792
316670eb
A		 3793 if (key_setsaval2(newsav,
3794 satype,
3795 alg_auth,
3796 alg_enc,
3797 flags,
3798 replay,
3799 key_auth,
3800 key_auth_len,
3801 key_enc,
3802 key_enc_len,
3803 natt_port,
3804 seq,
3805 spi,
3806 pid,
3807 lifetime_hard,
3808 lifetime_soft)) {
fe8ab488 3809 key_delsav(newsav);
316670eb
A		 3810 return NULL;
3811 }
3812
3813 /* reset created */
3814 {
3815 struct timeval tv;
3816 microtime(&tv);
3817 newsav->created = tv.tv_sec;
3818 }
3819
3820 newsav->pid = pid;
3821
3822 /* add to satree */
3823 newsav->sah = sah;
3824 newsav->refcnt = 1;
3825 if (spi && key_auth && key_auth_len && key_enc && key_enc_len) {
3826 newsav->state = SADB_SASTATE_MATURE;
3827 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_MATURE], newsav,
3828 secasvar, chain);
3829 } else {
3830 newsav->state = SADB_SASTATE_LARVAL;
3831 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
3832 secasvar, chain);
3833 }
3834 ipsec_sav_count++;
3835
3836 return newsav;
3837}
3838
3e170ce0
A		 3839static int
3840key_migratesav(struct secasvar *sav,
3841 struct secashead *newsah)
3842{
3843 if (sav == NULL || newsah == NULL || sav->state != SADB_SASTATE_MATURE) {
3844 return EINVAL;
3845 }
3846
3847 /* remove from SA header */
3848 if (__LIST_CHAINED(sav))
3849 LIST_REMOVE(sav, chain);
3850
3851 sav->sah = newsah;
3852 LIST_INSERT_TAIL(&newsah->savtree[SADB_SASTATE_MATURE], sav, secasvar, chain);
3853 return 0;
3854}
3855
1c79356b
A		 3856/*
3857 * free() SA variable entry.
3858 */
316670eb 3859void
6d2010ae 3860key_delsav(
39236c6e 3861 struct secasvar *sav)
1c79356b 3862{
39236c6e 3863
2d21ac55
A		 3864 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
3865
1c79356b
A		 3866 /* sanity check */
3867 if (sav == NULL)
3868 panic("key_delsav: NULL pointer is passed.\n");
39236c6e 3869
1c79356b
A		 3870 if (sav->refcnt > 0)
3871 return; /* can't free */
2d21ac55 3872
1c79356b
A		 3873 /* remove from SA header */
3874 if (__LIST_CHAINED(sav))
3875 LIST_REMOVE(sav, chain);
2d21ac55 3876 ipsec_sav_count--;
39236c6e 3877
91447636
A		 3878 if (sav->spihash.le_prev || sav->spihash.le_next)
3879 LIST_REMOVE(sav, spihash);
39236c6e 3880
9bccf70c
A		 3881 if (sav->key_auth != NULL) {
3882 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
1c79356b 3883 KFREE(sav->key_auth);
9bccf70c
A		 3884 sav->key_auth = NULL;
3885 }
3886 if (sav->key_enc != NULL) {
3887 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
1c79356b 3888 KFREE(sav->key_enc);
9bccf70c
A		 3889 sav->key_enc = NULL;
3890 }
3891 if (sav->sched) {
3892 bzero(sav->sched, sav->schedlen);
3893 KFREE(sav->sched);
3894 sav->sched = NULL;
3895 }
3896 if (sav->replay != NULL) {
1c79356b 3897 keydb_delsecreplay(sav->replay);
9bccf70c
A		 3898 sav->replay = NULL;
3899 }
3900 if (sav->lft_c != NULL) {
1c79356b 3901 KFREE(sav->lft_c);
9bccf70c
A		 3902 sav->lft_c = NULL;
3903 }
3904 if (sav->lft_h != NULL) {
1c79356b 3905 KFREE(sav->lft_h);
9bccf70c
A		 3906 sav->lft_h = NULL;
3907 }
3908 if (sav->lft_s != NULL) {
1c79356b 3909 KFREE(sav->lft_s);
9bccf70c
A		 3910 sav->lft_s = NULL;
3911 }
3912 if (sav->iv != NULL) {
1c79356b 3913 KFREE(sav->iv);
9bccf70c
A		 3914 sav->iv = NULL;
3915 }
39236c6e 3916
1c79356b 3917 KFREE(sav);
39236c6e 3918
1c79356b
A		 3919 return;
3920}
3921
3922/*
3923 * search SAD.
3924 * OUT:
3925 * NULL : not found
3926 * others : found, pointer to a SA.
3927 */
3928static struct secashead *
fe8ab488 3929key_getsah(struct secasindex *saidx)
1c79356b
A		 3930{
3931 struct secashead *sah;
39236c6e 3932
91447636 3933 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 3934
1c79356b
A		 3935 LIST_FOREACH(sah, &sahtree, chain) {
3936 if (sah->state == SADB_SASTATE_DEAD)
3937 continue;
55e303ae 3938 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
9bccf70c 3939 return sah;
1c79356b 3940 }
39236c6e 3941
1c79356b
A		 3942 return NULL;
3943}
3944
316670eb
A		 3945struct secashead *
3946key_newsah2 (struct secasindex *saidx,
3947 u_int8_t dir)
3948{
3949 struct secashead *sah;
39236c6e 3950
316670eb 3951 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 3952
316670eb
A		 3953 sah = key_getsah(saidx);
3954 if (!sah) {
fe8ab488 3955 return(key_newsah(saidx, NULL, 0, dir));
316670eb
A		 3956 }
3957 return sah;
3958}
3959
1c79356b
A		 3960/*
3961 * check not to be duplicated SPI.
3962 * NOTE: this function is too slow due to searching all SAD.
3963 * OUT:
3964 * NULL : not found
3965 * others : found, pointer to a SA.
3966 */
3967static struct secasvar *
6d2010ae 3968key_checkspidup(
39236c6e
A		 3969 struct secasindex *saidx,
3970 u_int32_t spi)
1c79356b 3971{
1c79356b 3972 struct secasvar *sav;
91447636
A		 3973 u_int stateidx, state;
3974
3975 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 3976
1c79356b
A		 3977 /* check address family */
3978 if (saidx->src.ss_family != saidx->dst.ss_family) {
55e303ae 3979 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
1c79356b
A		 3980 return NULL;
3981 }
39236c6e 3982
1c79356b 3983 /* check all SAD */
91447636
A		 3984 LIST_FOREACH(sav, &spihash[SPIHASH(spi)], spihash) {
3985 if (sav->spi != spi)
1c79356b 3986 continue;
91447636
A		 3987 for (stateidx = 0;
3988 stateidx < _ARRAYLEN(saorder_state_alive);
3989 stateidx++) {
3990 state = saorder_state_alive[stateidx];
3991 if (sav->state == state &&
3992 key_ismyaddr((struct sockaddr *)&sav->sah->saidx.dst))
3993 return sav;
3994 }
1c79356b 3995 }
39236c6e 3996
1c79356b
A		 3997 return NULL;
3998}
3999
91447636 4000static void
6d2010ae 4001key_setspi(
39236c6e
A		 4002 struct secasvar *sav,
4003 u_int32_t spi)
91447636 4004{
2d21ac55 4005 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
91447636
A		 4006 sav->spi = spi;
4007 if (sav->spihash.le_prev || sav->spihash.le_next)
4008 LIST_REMOVE(sav, spihash);
4009 LIST_INSERT_HEAD(&spihash[SPIHASH(spi)], sav, spihash);
4010}
4011
4012
1c79356b
A		 4013/*
4014 * search SAD litmited alive SA, protocol, SPI.
4015 * OUT:
4016 * NULL : not found
4017 * others : found, pointer to a SA.
4018 */
4019static struct secasvar *
6d2010ae 4020key_getsavbyspi(
39236c6e
A		 4021 struct secashead *sah,
4022 u_int32_t spi)
1c79356b 4023{
91447636
A		 4024 struct secasvar *sav, *match;
4025 u_int stateidx, state, matchidx;
39236c6e 4026
2d21ac55 4027 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
91447636
A		 4028 match = NULL;
4029 matchidx = _ARRAYLEN(saorder_state_alive);
4030 LIST_FOREACH(sav, &spihash[SPIHASH(spi)], spihash) {
4031 if (sav->spi != spi)
4032 continue;
4033 if (sav->sah != sah)
4034 continue;
4035 for (stateidx = 0; stateidx < matchidx; stateidx++) {
4036 state = saorder_state_alive[stateidx];
4037 if (sav->state == state) {
4038 match = sav;
4039 matchidx = stateidx;
4040 break;
1c79356b 4041 }
1c79356b
A		 4042 }
4043 }
39236c6e 4044
91447636 4045 return match;
1c79356b
A		 4046}
4047
4048/*
4049 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
4050 * You must update these if need.
4051 * OUT: 0: success.
9bccf70c
A		 4052 * !0: failure.
4053 *
4054 * does not modify mbuf. does not free mbuf on error.
1c79356b
A		 4055 */
4056static int
6d2010ae 4057key_setsaval(
39236c6e
A		 4058 struct secasvar *sav,
4059 struct mbuf *m,
4060 const struct sadb_msghdr *mhp)
1c79356b 4061{
9bccf70c
A		 4062#if IPSEC_ESP
4063 const struct esp_algorithm *algo;
4064#endif
1c79356b 4065 int error = 0;
9bccf70c 4066 struct timeval tv;
39236c6e 4067
91447636 4068 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 4069
1c79356b 4070 /* sanity check */
9bccf70c 4071 if (m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 4072 panic("key_setsaval: NULL pointer is passed.\n");
39236c6e 4073
1c79356b
A		 4074 /* initialization */
4075 sav->replay = NULL;
4076 sav->key_auth = NULL;
4077 sav->key_enc = NULL;
9bccf70c
A		 4078 sav->sched = NULL;
4079 sav->schedlen = 0;
1c79356b
A		 4080 sav->iv = NULL;
4081 sav->lft_c = NULL;
4082 sav->lft_h = NULL;
4083 sav->lft_s = NULL;
55e303ae
A		 4084 sav->remote_ike_port = 0;
4085 sav->natt_last_activity = natt_now;
2d21ac55 4086 sav->natt_encapsulated_src_port = 0;
39236c6e 4087
1c79356b 4088 /* SA */
9bccf70c
A		 4089 if (mhp->ext[SADB_EXT_SA] != NULL) {
4090 const struct sadb_sa *sa0;
39236c6e 4091
316670eb 4092 sa0 = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
9bccf70c 4093 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
3a60a9f5 4094 ipseclog((LOG_DEBUG, "key_setsaval: invalid message size.\n"));
9bccf70c
A		 4095 error = EINVAL;
4096 goto fail;
4097 }
39236c6e 4098
1c79356b
A		 4099 sav->alg_auth = sa0->sadb_sa_auth;
4100 sav->alg_enc = sa0->sadb_sa_encrypt;
4101 sav->flags = sa0->sadb_sa_flags;
55e303ae
A		 4102
4103 /*
4104 * Verify that a nat-traversal port was specified if
4105 * the nat-traversal flag is set.
4106 */
4107 if ((sav->flags & SADB_X_EXT_NATT) != 0) {
4108 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa_2) ||
39236c6e 4109 ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_port == 0) {
3a60a9f5 4110 ipseclog((LOG_DEBUG, "key_setsaval: natt port not set.\n"));
55e303ae
A		 4111 error = EINVAL;
4112 goto fail;
4113 }
b0d623f7 4114 sav->remote_ike_port = ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_port;
fe8ab488 4115 sav->natt_interval = ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_interval;
3e170ce0 4116 sav->natt_offload_interval = ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_offload_interval;
55e303ae 4117 }
2d21ac55
A		 4118
4119 /*
4120 * Verify if SADB_X_EXT_NATT_MULTIPLEUSERS flag is set that
39236c6e 4121 * SADB_X_EXT_NATT is set and SADB_X_EXT_NATT_KEEPALIVE is not
2d21ac55
A		 4122 * set (we're not behind nat) - otherwise clear it.
4123 */
4124 if ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0)
4125 if ((sav->flags & SADB_X_EXT_NATT) == 0 ||
4126 (sav->flags & SADB_X_EXT_NATT_KEEPALIVE) != 0)
4127 sav->flags &= ~SADB_X_EXT_NATT_MULTIPLEUSERS;
39236c6e 4128
1c79356b
A		 4129 /* replay window */
4130 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
4131 sav->replay = keydb_newsecreplay(sa0->sadb_sa_replay);
4132 if (sav->replay == NULL) {
55e303ae 4133 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
1c79356b 4134 error = ENOBUFS;
9bccf70c 4135 goto fail;
1c79356b
A		 4136 }
4137 }
4138 }
39236c6e 4139
1c79356b 4140 /* Authentication keys */
9bccf70c
A		 4141 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
4142 const struct sadb_key *key0;
4143 int len;
39236c6e 4144
9bccf70c
A		 4145 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
4146 len = mhp->extlen[SADB_EXT_KEY_AUTH];
39236c6e 4147
1c79356b 4148 error = 0;
9bccf70c 4149 if (len < sizeof(*key0)) {
3a60a9f5 4150 ipseclog((LOG_DEBUG, "key_setsaval: invalid auth key ext len. len = %d\n", len));
1c79356b 4151 error = EINVAL;
9bccf70c
A		 4152 goto fail;
4153 }
4154 switch (mhp->msg->sadb_msg_satype) {
39236c6e
A		 4155 case SADB_SATYPE_AH:
4156 case SADB_SATYPE_ESP:
4157 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
4158 sav->alg_auth != SADB_X_AALG_NULL)
4159 error = EINVAL;
4160 break;
4161 case SADB_X_SATYPE_IPCOMP:
4162 default:
1c79356b 4163 error = EINVAL;
39236c6e 4164 break;
1c79356b
A		 4165 }
4166 if (error) {
55e303ae 4167 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
9bccf70c 4168 goto fail;
1c79356b 4169 }
39236c6e 4170
1c79356b
A		 4171 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
4172 if (sav->key_auth == NULL) {
55e303ae 4173 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
1c79356b 4174 error = ENOBUFS;
9bccf70c 4175 goto fail;
1c79356b 4176 }
1c79356b 4177 }
39236c6e 4178
1c79356b 4179 /* Encryption key */
9bccf70c
A		 4180 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
4181 const struct sadb_key *key0;
4182 int len;
39236c6e 4183
9bccf70c
A		 4184 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
4185 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
39236c6e 4186
1c79356b 4187 error = 0;
9bccf70c 4188 if (len < sizeof(*key0)) {
3a60a9f5 4189 ipseclog((LOG_DEBUG, "key_setsaval: invalid encryption key ext len. len = %d\n", len));
1c79356b 4190 error = EINVAL;
9bccf70c
A		 4191 goto fail;
4192 }
4193 switch (mhp->msg->sadb_msg_satype) {
39236c6e
A		 4194 case SADB_SATYPE_ESP:
4195 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
4196 sav->alg_enc != SADB_EALG_NULL) {
4197 ipseclog((LOG_DEBUG, "key_setsaval: invalid ESP algorithm.\n"));
4198 error = EINVAL;
4199 break;
4200 }
4201 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
4202 if (sav->key_enc == NULL) {
4203 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4204 error = ENOBUFS;
4205 goto fail;
4206 }
9bccf70c 4207 break;
39236c6e
A		 4208 case SADB_X_SATYPE_IPCOMP:
4209 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
4210 error = EINVAL;
4211 sav->key_enc = NULL; /*just in case*/
4212 break;
4213 case SADB_SATYPE_AH:
4214 default:
9bccf70c 4215 error = EINVAL;
39236c6e 4216 break;
1c79356b
A		 4217 }
4218 if (error) {
3a60a9f5 4219 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_enc value.\n"));
9bccf70c 4220 goto fail;
1c79356b 4221 }
1c79356b 4222 }
39236c6e 4223
1c79356b
A		 4224 /* set iv */
4225 sav->ivlen = 0;
39236c6e 4226
9bccf70c 4227 switch (mhp->msg->sadb_msg_satype) {
39236c6e 4228 case SADB_SATYPE_ESP:
1c79356b 4229#if IPSEC_ESP
39236c6e
A		 4230 algo = esp_algorithm_lookup(sav->alg_enc);
4231 if (algo && algo->ivlen)
4232 sav->ivlen = (*algo->ivlen)(algo, sav);
4233 if (sav->ivlen == 0)
4234 break;
4235 KMALLOC_NOWAIT(sav->iv, caddr_t, sav->ivlen);
2d21ac55 4236 if (sav->iv == 0) {
39236c6e
A		 4237 lck_mtx_unlock(sadb_mutex);
4238 KMALLOC_WAIT(sav->iv, caddr_t, sav->ivlen);
4239 lck_mtx_lock(sadb_mutex);
4240 if (sav->iv == 0) {
4241 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4242 error = ENOBUFS;
4243 goto fail;
4244 }
2d21ac55 4245 }
39236c6e
A		 4246
4247 /* initialize */
4248 key_randomfill(sav->iv, sav->ivlen);
1c79356b 4249#endif
39236c6e
A		 4250 break;
4251 case SADB_SATYPE_AH:
4252 case SADB_X_SATYPE_IPCOMP:
4253 break;
4254 default:
4255 ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n"));
4256 error = EINVAL;
4257 goto fail;
1c79356b 4258 }
39236c6e 4259
9bccf70c
A		 4260 /* reset created */
4261 microtime(&tv);
4262 sav->created = tv.tv_sec;
39236c6e 4263
1c79356b 4264 /* make lifetime for CURRENT */
2d21ac55 4265 KMALLOC_NOWAIT(sav->lft_c, struct sadb_lifetime *,
39236c6e 4266 sizeof(struct sadb_lifetime));
1c79356b 4267 if (sav->lft_c == NULL) {
2d21ac55
A		 4268 lck_mtx_unlock(sadb_mutex);
4269 KMALLOC_WAIT(sav->lft_c, struct sadb_lifetime *,
39236c6e 4270 sizeof(struct sadb_lifetime));
2d21ac55
A		 4271 lck_mtx_lock(sadb_mutex);
4272 if (sav->lft_c == NULL) {
4273 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4274 error = ENOBUFS;
4275 goto fail;
4276 }
1c79356b 4277 }
39236c6e 4278
1c79356b 4279 microtime(&tv);
39236c6e 4280
1c79356b 4281 sav->lft_c->sadb_lifetime_len =
39236c6e 4282 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
1c79356b
A		 4283 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
4284 sav->lft_c->sadb_lifetime_allocations = 0;
4285 sav->lft_c->sadb_lifetime_bytes = 0;
4286 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
4287 sav->lft_c->sadb_lifetime_usetime = 0;
39236c6e 4288
1c79356b
A		 4289 /* lifetimes for HARD and SOFT */
4290 {
39236c6e
A		 4291 const struct sadb_lifetime *lft0;
4292
4293 lft0 = (struct sadb_lifetime *)
316670eb 4294 (void *)mhp->ext[SADB_EXT_LIFETIME_HARD];
39236c6e
A		 4295 if (lft0 != NULL) {
4296 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
4297 ipseclog((LOG_DEBUG, "key_setsaval: invalid hard lifetime ext len.\n"));
4298 error = EINVAL;
4299 goto fail;
4300 }
4301 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
4302 sizeof(*lft0));
4303 if (sav->lft_h == NULL) {
4304 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4305 error = ENOBUFS;
4306 goto fail;
4307 }
4308 /* to be initialize ? */
1c79356b 4309 }
39236c6e
A		 4310
4311 lft0 = (struct sadb_lifetime *)
316670eb 4312 (void *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
39236c6e
A		 4313 if (lft0 != NULL) {
4314 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
4315 ipseclog((LOG_DEBUG, "key_setsaval: invalid soft lifetime ext len.\n"));
4316 error = EINVAL;
4317 goto fail;
4318 }
4319 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
4320 sizeof(*lft0));
4321 if (sav->lft_s == NULL) {
4322 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4323 error = ENOBUFS;
4324 goto fail;
4325 }
4326 /* to be initialize ? */
1c79356b 4327 }
1c79356b 4328 }
39236c6e 4329
1c79356b 4330 return 0;
39236c6e
A		 4331
4332fail:
1c79356b 4333 /* initialization */
9bccf70c 4334 if (sav->replay != NULL) {
1c79356b 4335 keydb_delsecreplay(sav->replay);
9bccf70c
A		 4336 sav->replay = NULL;
4337 }
4338 if (sav->key_auth != NULL) {
55e303ae 4339 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
1c79356b 4340 KFREE(sav->key_auth);
9bccf70c
A		 4341 sav->key_auth = NULL;
4342 }
4343 if (sav->key_enc != NULL) {
55e303ae 4344 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
1c79356b 4345 KFREE(sav->key_enc);
9bccf70c
A		 4346 sav->key_enc = NULL;
4347 }
4348 if (sav->sched) {
55e303ae 4349 bzero(sav->sched, sav->schedlen);
9bccf70c
A		 4350 KFREE(sav->sched);
4351 sav->sched = NULL;
4352 }
4353 if (sav->iv != NULL) {
1c79356b 4354 KFREE(sav->iv);
9bccf70c
A		 4355 sav->iv = NULL;
4356 }
4357 if (sav->lft_c != NULL) {
1c79356b 4358 KFREE(sav->lft_c);
9bccf70c
A		 4359 sav->lft_c = NULL;
4360 }
4361 if (sav->lft_h != NULL) {
1c79356b 4362 KFREE(sav->lft_h);
9bccf70c
A		 4363 sav->lft_h = NULL;
4364 }
4365 if (sav->lft_s != NULL) {
1c79356b 4366 KFREE(sav->lft_s);
9bccf70c
A		 4367 sav->lft_s = NULL;
4368 }
39236c6e 4369
9bccf70c 4370 return error;
1c79356b
A		 4371}
4372
316670eb
A		 4373/*
4374 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
4375 * You must update these if need.
4376 * OUT: 0: success.
4377 * !0: failure.
4378 *
4379 * does not modify mbuf. does not free mbuf on error.
4380 */
4381int
4382key_setsaval2(struct secasvar *sav,
4383 u_int8_t satype,
4384 u_int8_t alg_auth,
4385 u_int8_t alg_enc,
4386 u_int32_t flags,
4387 u_int8_t replay,
4388 struct sadb_key *key_auth,
4389 u_int16_t key_auth_len,
4390 struct sadb_key *key_enc,
4391 u_int16_t key_enc_len,
4392 u_int16_t natt_port,
4393 u_int32_t seq,
4394 u_int32_t spi,
4395 u_int32_t pid,
4396 struct sadb_lifetime *lifetime_hard,
4397 struct sadb_lifetime *lifetime_soft)
4398{
4399#if IPSEC_ESP
4400 const struct esp_algorithm *algo;
4401#endif
4402 int error = 0;
4403 struct timeval tv;
39236c6e 4404
316670eb 4405 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 4406
316670eb
A		 4407 /* initialization */
4408 sav->replay = NULL;
4409 sav->key_auth = NULL;
4410 sav->key_enc = NULL;
4411 sav->sched = NULL;
4412 sav->schedlen = 0;
4413 sav->iv = NULL;
4414 sav->lft_c = NULL;
4415 sav->lft_h = NULL;
4416 sav->lft_s = NULL;
4417 sav->remote_ike_port = 0;
4418 sav->natt_last_activity = natt_now;
4419 sav->natt_encapsulated_src_port = 0;
39236c6e 4420
316670eb
A		 4421 sav->alg_auth = alg_auth;
4422 sav->alg_enc = alg_enc;
4423 sav->flags = flags;
4424 sav->pid = pid;
4425 sav->seq = seq;
4426 key_setspi(sav, htonl(spi));
39236c6e 4427
316670eb
A		 4428 /*
4429 * Verify that a nat-traversal port was specified if
4430 * the nat-traversal flag is set.
4431 */
4432 if ((sav->flags & SADB_X_EXT_NATT) != 0) {
4433 if (natt_port == 0) {
4434 ipseclog((LOG_DEBUG, "key_setsaval2: natt port not set.\n"));
4435 error = EINVAL;
4436 goto fail;
4437 }
4438 sav->remote_ike_port = natt_port;
4439 }
39236c6e 4440
316670eb
A		 4441 /*
4442 * Verify if SADB_X_EXT_NATT_MULTIPLEUSERS flag is set that
39236c6e 4443 * SADB_X_EXT_NATT is set and SADB_X_EXT_NATT_KEEPALIVE is not
316670eb
A		 4444 * set (we're not behind nat) - otherwise clear it.
4445 */
4446 if ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0)
4447 if ((sav->flags & SADB_X_EXT_NATT) == 0 ||
4448 (sav->flags & SADB_X_EXT_NATT_KEEPALIVE) != 0)
4449 sav->flags &= ~SADB_X_EXT_NATT_MULTIPLEUSERS;
39236c6e 4450
316670eb
A		 4451 /* replay window */
4452 if ((flags & SADB_X_EXT_OLD) == 0) {
4453 sav->replay = keydb_newsecreplay(replay);
4454 if (sav->replay == NULL) {
4455 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4456 error = ENOBUFS;
4457 goto fail;
4458 }
4459 }
4460
4461 /* Authentication keys */
4462 sav->key_auth = (__typeof__(sav->key_auth))key_newbuf(key_auth, key_auth_len);
4463 if (sav->key_auth == NULL) {
4464 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4465 error = ENOBUFS;
4466 goto fail;
4467 }
4468
4469 /* Encryption key */
4470 sav->key_enc = (__typeof__(sav->key_enc))key_newbuf(key_enc, key_enc_len);
4471 if (sav->key_enc == NULL) {
4472 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4473 error = ENOBUFS;
4474 goto fail;
4475 }
4476
4477 /* set iv */
4478 sav->ivlen = 0;
39236c6e 4479
316670eb
A		 4480 if (satype == SADB_SATYPE_ESP) {
4481#if IPSEC_ESP
4482 algo = esp_algorithm_lookup(sav->alg_enc);
4483 if (algo && algo->ivlen)
4484 sav->ivlen = (*algo->ivlen)(algo, sav);
4485 if (sav->ivlen != 0) {
4486 KMALLOC_NOWAIT(sav->iv, caddr_t, sav->ivlen);
4487 if (sav->iv == 0) {
4488 lck_mtx_unlock(sadb_mutex);
4489 KMALLOC_WAIT(sav->iv, caddr_t, sav->ivlen);
4490 lck_mtx_lock(sadb_mutex);
4491 if (sav->iv == 0) {
4492 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4493 error = ENOBUFS;
4494 goto fail;
4495 }
4496 }
4497 /* initialize */
4498 key_randomfill(sav->iv, sav->ivlen);
4499 }
4500#endif
4501 }
39236c6e 4502
316670eb
A		 4503 /* reset created */
4504 microtime(&tv);
4505 sav->created = tv.tv_sec;
4506
4507 /* make lifetime for CURRENT */
4508 KMALLOC_NOWAIT(sav->lft_c, struct sadb_lifetime *,
4509 sizeof(struct sadb_lifetime));
4510 if (sav->lft_c == NULL) {
4511 lck_mtx_unlock(sadb_mutex);
4512 KMALLOC_WAIT(sav->lft_c, struct sadb_lifetime *,
4513 sizeof(struct sadb_lifetime));
4514 lck_mtx_lock(sadb_mutex);
4515 if (sav->lft_c == NULL) {
4516 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4517 error = ENOBUFS;
4518 goto fail;
4519 }
4520 }
4521
4522 microtime(&tv);
4523
4524 sav->lft_c->sadb_lifetime_len =
4525 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
4526 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
4527 sav->lft_c->sadb_lifetime_allocations = 0;
4528 sav->lft_c->sadb_lifetime_bytes = 0;
4529 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
4530 sav->lft_c->sadb_lifetime_usetime = 0;
4531
4532 /* lifetimes for HARD and SOFT */
4533 sav->lft_h = (__typeof__(sav->lft_h))key_newbuf(lifetime_hard,
4534 sizeof(*lifetime_hard));
4535 if (sav->lft_h == NULL) {
4536 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4537 error = ENOBUFS;
4538 goto fail;
4539 }
4540 sav->lft_s = (__typeof__(sav->lft_s))key_newbuf(lifetime_soft,
4541 sizeof(*lifetime_soft));
4542 if (sav->lft_s == NULL) {
4543 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
4544 error = ENOBUFS;
4545 goto fail;
4546 }
4547
4548 return 0;
4549
4550fail:
4551 /* initialization */
4552 if (sav->replay != NULL) {
4553 keydb_delsecreplay(sav->replay);
4554 sav->replay = NULL;
4555 }
4556 if (sav->key_auth != NULL) {
4557 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
4558 KFREE(sav->key_auth);
4559 sav->key_auth = NULL;
4560 }
4561 if (sav->key_enc != NULL) {
4562 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
4563 KFREE(sav->key_enc);
4564 sav->key_enc = NULL;
4565 }
4566 if (sav->sched) {
4567 bzero(sav->sched, sav->schedlen);
4568 KFREE(sav->sched);
4569 sav->sched = NULL;
4570 }
4571 if (sav->iv != NULL) {
4572 KFREE(sav->iv);
4573 sav->iv = NULL;
4574 }
4575 if (sav->lft_c != NULL) {
4576 KFREE(sav->lft_c);
4577 sav->lft_c = NULL;
4578 }
4579 if (sav->lft_h != NULL) {
4580 KFREE(sav->lft_h);
4581 sav->lft_h = NULL;
4582 }
4583 if (sav->lft_s != NULL) {
4584 KFREE(sav->lft_s);
4585 sav->lft_s = NULL;
4586 }
4587
4588 return error;
4589}
4590
1c79356b
A		 4591/*
4592 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
4593 * OUT: 0: valid
4594 * other: errno
4595 */
4596static int
6d2010ae 4597key_mature(
39236c6e 4598 struct secasvar *sav)
1c79356b
A		 4599{
4600 int mature;
4601 int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
4602 int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
39236c6e 4603
1c79356b 4604 mature = 0;
39236c6e 4605
91447636 4606 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 4607
1c79356b 4608 /* check SPI value */
9bccf70c 4609 switch (sav->sah->saidx.proto) {
39236c6e
A		 4610 case IPPROTO_ESP:
4611 case IPPROTO_AH:
4612
4613 /* No reason to test if this is >= 0, because ntohl(sav->spi) is unsigned. */
4614 if (ntohl(sav->spi) <= 255) {
4615 ipseclog((LOG_DEBUG,
4616 "key_mature: illegal range of SPI %u.\n",
4617 (u_int32_t)ntohl(sav->spi)));
4618 return EINVAL;
4619 }
4620 break;
1c79356b 4621 }
39236c6e 4622
1c79356b
A		 4623 /* check satype */
4624 switch (sav->sah->saidx.proto) {
39236c6e
A		 4625 case IPPROTO_ESP:
4626 /* check flags */
4627 if ((sav->flags & SADB_X_EXT_OLD)
4628 && (sav->flags & SADB_X_EXT_DERIV)) {
4629 ipseclog((LOG_DEBUG, "key_mature: "
4630 "invalid flag (derived) given to old-esp.\n"));
4631 return EINVAL;
4632 }
4633 if (sav->alg_auth == SADB_AALG_NONE)
4634 checkmask = 1;
4635 else
4636 checkmask = 3;
4637 mustmask = 1;
4638 break;
4639 case IPPROTO_AH:
4640 /* check flags */
4641 if (sav->flags & SADB_X_EXT_DERIV) {
4642 ipseclog((LOG_DEBUG, "key_mature: "
4643 "invalid flag (derived) given to AH SA.\n"));
4644 return EINVAL;
4645 }
4646 if (sav->alg_enc != SADB_EALG_NONE) {
4647 ipseclog((LOG_DEBUG, "key_mature: "
4648 "protocol and algorithm mismated.\n"));
4649 return(EINVAL);
4650 }
4651 checkmask = 2;
4652 mustmask = 2;
4653 break;
4654 case IPPROTO_IPCOMP:
4655 if (sav->alg_auth != SADB_AALG_NONE) {
4656 ipseclog((LOG_DEBUG, "key_mature: "
4657 "protocol and algorithm mismated.\n"));
4658 return(EINVAL);
4659 }
4660 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
4661 && ntohl(sav->spi) >= 0x10000) {
4662 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
4663 return(EINVAL);
4664 }
4665 checkmask = 4;
4666 mustmask = 4;
4667 break;
4668 default:
4669 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
4670 return EPROTONOSUPPORT;
1c79356b 4671 }
39236c6e 4672
1c79356b
A		 4673 /* check authentication algorithm */
4674 if ((checkmask & 2) != 0) {
9bccf70c 4675 const struct ah_algorithm *algo;
1c79356b 4676 int keylen;
39236c6e 4677
9bccf70c
A		 4678 algo = ah_algorithm_lookup(sav->alg_auth);
4679 if (!algo) {
55e303ae 4680 ipseclog((LOG_DEBUG,"key_mature: "
39236c6e 4681 "unknown authentication algorithm.\n"));
1c79356b
A		 4682 return EINVAL;
4683 }
39236c6e 4684
1c79356b 4685 /* algorithm-dependent check */
1c79356b
A		 4686 if (sav->key_auth)
4687 keylen = sav->key_auth->sadb_key_bits;
4688 else
4689 keylen = 0;
4690 if (keylen < algo->keymin || algo->keymax < keylen) {
55e303ae 4691 ipseclog((LOG_DEBUG,
39236c6e
A		 4692 "key_mature: invalid AH key length %d "
4693 "(%d-%d allowed)\n",
4694 keylen, algo->keymin, algo->keymax));
1c79356b
A		 4695 return EINVAL;
4696 }
39236c6e 4697
1c79356b
A		 4698 if (algo->mature) {
4699 if ((*algo->mature)(sav)) {
4700 /* message generated in per-algorithm function*/
4701 return EINVAL;
4702 } else
4703 mature = SADB_SATYPE_AH;
4704 }
39236c6e 4705
1c79356b 4706 if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) {
55e303ae 4707 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n"));
1c79356b
A		 4708 return EINVAL;
4709 }
4710 }
39236c6e 4711
1c79356b
A		 4712 /* check encryption algorithm */
4713 if ((checkmask & 1) != 0) {
4714#if IPSEC_ESP
9bccf70c 4715 const struct esp_algorithm *algo;
1c79356b 4716 int keylen;
39236c6e 4717
9bccf70c
A		 4718 algo = esp_algorithm_lookup(sav->alg_enc);
4719 if (!algo) {
55e303ae 4720 ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n"));
1c79356b
A		 4721 return EINVAL;
4722 }
39236c6e 4723
1c79356b 4724 /* algorithm-dependent check */
1c79356b
A		 4725 if (sav->key_enc)
4726 keylen = sav->key_enc->sadb_key_bits;
4727 else
4728 keylen = 0;
4729 if (keylen < algo->keymin || algo->keymax < keylen) {
55e303ae 4730 ipseclog((LOG_DEBUG,
39236c6e
A		 4731 "key_mature: invalid ESP key length %d "
4732 "(%d-%d allowed)\n",
4733 keylen, algo->keymin, algo->keymax));
1c79356b
A		 4734 return EINVAL;
4735 }
39236c6e 4736
1c79356b
A		 4737 if (algo->mature) {
4738 if ((*algo->mature)(sav)) {
4739 /* message generated in per-algorithm function*/
4740 return EINVAL;
4741 } else
4742 mature = SADB_SATYPE_ESP;
4743 }
39236c6e 4744
1c79356b 4745 if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) {
55e303ae 4746 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n"));
1c79356b
A		 4747 return EINVAL;
4748 }
4749#else /*IPSEC_ESP*/
55e303ae 4750 ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n"));
1c79356b
A		 4751 return EINVAL;
4752#endif
4753 }
39236c6e 4754
1c79356b
A		 4755 /* check compression algorithm */
4756 if ((checkmask & 4) != 0) {
9bccf70c 4757 const struct ipcomp_algorithm *algo;
39236c6e 4758
9bccf70c
A		 4759 /* algorithm-dependent check */
4760 algo = ipcomp_algorithm_lookup(sav->alg_enc);
4761 if (!algo) {
55e303ae 4762 ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n"));
1c79356b
A		 4763 return EINVAL;
4764 }
4765 }
39236c6e 4766
1c79356b 4767 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
39236c6e 4768
1c79356b
A		 4769 return 0;
4770}
4771
4772/*
4773 * subroutine for SADB_GET and SADB_DUMP.
1c79356b 4774 */
9bccf70c 4775static struct mbuf *
6d2010ae 4776key_setdumpsa(
39236c6e
A		 4777 struct secasvar *sav,
4778 u_int8_t type,
4779 u_int8_t satype,
4780 u_int32_t seq,
4781 u_int32_t pid)
1c79356b 4782{
9bccf70c
A		 4783 struct mbuf *result = NULL, *tres = NULL, *m;
4784 int l = 0;
1c79356b 4785 int i;
9bccf70c
A		 4786 void *p;
4787 int dumporder[] = {
4788 SADB_EXT_SA, SADB_X_EXT_SA2,
4789 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
4790 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
4791 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
4792 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
4793 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
4794 };
2d21ac55 4795
9bccf70c
A		 4796 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
4797 if (m == NULL)
4798 goto fail;
4799 result = m;
39236c6e 4800
9bccf70c
A		 4801 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
4802 m = NULL;
4803 p = NULL;
4804 switch (dumporder[i]) {
39236c6e
A		 4805 case SADB_EXT_SA:
4806 m = key_setsadbsa(sav);
4807 if (!m)
4808 goto fail;
4809 break;
4810
4811 case SADB_X_EXT_SA2:
4812 m = key_setsadbxsa2(sav->sah->saidx.mode,
4813 sav->replay ? sav->replay->count : 0,
fe8ab488
A		 4814 sav->sah->saidx.reqid,
4815 sav->flags2);
39236c6e
A		 4816 if (!m)
4817 goto fail;
4818 break;
4819
4820 case SADB_EXT_ADDRESS_SRC:
4821 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
4822 (struct sockaddr *)&sav->sah->saidx.src,
4823 FULLMASK, IPSEC_ULPROTO_ANY);
4824 if (!m)
4825 goto fail;
4826 break;
4827
4828 case SADB_EXT_ADDRESS_DST:
4829 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
4830 (struct sockaddr *)&sav->sah->saidx.dst,
4831 FULLMASK, IPSEC_ULPROTO_ANY);
4832 if (!m)
4833 goto fail;
4834 break;
4835
4836 case SADB_EXT_KEY_AUTH:
4837 if (!sav->key_auth)
4838 continue;
4839 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
4840 p = sav->key_auth;
4841 break;
4842
4843 case SADB_EXT_KEY_ENCRYPT:
4844 if (!sav->key_enc)
4845 continue;
4846 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
4847 p = sav->key_enc;
4848 break;
4849
4850 case SADB_EXT_LIFETIME_CURRENT:
4851 if (!sav->lft_c)
4852 continue;
4853 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
4854 p = sav->lft_c;
4855 break;
4856
4857 case SADB_EXT_LIFETIME_HARD:
4858 if (!sav->lft_h)
4859 continue;
4860 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
4861 p = sav->lft_h;
4862 break;
4863
4864 case SADB_EXT_LIFETIME_SOFT:
4865 if (!sav->lft_s)
4866 continue;
4867 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
4868 p = sav->lft_s;
4869 break;
4870
4871 case SADB_EXT_ADDRESS_PROXY:
4872 case SADB_EXT_IDENTITY_SRC:
4873 case SADB_EXT_IDENTITY_DST:
4874 /* XXX: should we brought from SPD ? */
4875 case SADB_EXT_SENSITIVITY:
4876 default:
9bccf70c 4877 continue;
9bccf70c 4878 }
39236c6e 4879
9bccf70c
A		 4880 if ((!m && !p) || (m && p))
4881 goto fail;
4882 if (p && tres) {
3e170ce0 4883 M_PREPEND(tres, l, M_WAITOK, 1);
9bccf70c
A		 4884 if (!tres)
4885 goto fail;
4886 bcopy(p, mtod(tres, caddr_t), l);
4887 continue;
1c79356b 4888 }
9bccf70c
A		 4889 if (p) {
4890 m = key_alloc_mbuf(l);
4891 if (!m)
4892 goto fail;
4893 m_copyback(m, 0, l, p);
4894 }
39236c6e 4895
9bccf70c
A		 4896 if (tres)
4897 m_cat(m, tres);
4898 tres = m;
1c79356b 4899 }
39236c6e 4900
9bccf70c 4901 m_cat(result, tres);
39236c6e 4902
fe8ab488
A		 4903 if (sav->sah && (sav->sah->outgoing_if || sav->sah->ipsec_if)) {
4904 m = key_setsadbipsecif(NULL, ifindex2ifnet[sav->sah->outgoing_if], sav->sah->ipsec_if, 0);
4905 if (!m)
4906 goto fail;
4907 m_cat(result, m);
4908 }
4909
9bccf70c
A		 4910 if (result->m_len < sizeof(struct sadb_msg)) {
4911 result = m_pullup(result, sizeof(struct sadb_msg));
4912 if (result == NULL)
4913 goto fail;
4914 }
39236c6e 4915
9bccf70c
A		 4916 result->m_pkthdr.len = 0;
4917 for (m = result; m; m = m->m_next)
4918 result->m_pkthdr.len += m->m_len;
39236c6e 4919
9bccf70c 4920 mtod(result, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 4921 PFKEY_UNIT64(result->m_pkthdr.len);
4922
9bccf70c 4923 return result;
39236c6e 4924
9bccf70c
A		 4925fail:
4926 m_freem(result);
4927 m_freem(tres);
4928 return NULL;
1c79356b 4929}
1c79356b
A		 4930
4931/*
4932 * set data into sadb_msg.
1c79356b 4933 */
9bccf70c 4934static struct mbuf *
6d2010ae 4935key_setsadbmsg(
39236c6e
A		 4936 u_int8_t type,
4937 u_int16_t tlen,
4938 u_int8_t satype,
4939 u_int32_t seq,
4940 pid_t pid,
4941 u_int16_t reserved)
1c79356b 4942{
9bccf70c 4943 struct mbuf *m;
1c79356b 4944 struct sadb_msg *p;
9bccf70c 4945 int len;
39236c6e 4946
9bccf70c
A		 4947 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
4948 if (len > MCLBYTES)
4949 return NULL;
4950 MGETHDR(m, M_DONTWAIT, MT_DATA);
4951 if (m && len > MHLEN) {
4952 MCLGET(m, M_DONTWAIT);
4953 if ((m->m_flags & M_EXT) == 0) {
4954 m_freem(m);
4955 m = NULL;
4956 }
4957 }
4958 if (!m)
4959 return NULL;
4960 m->m_pkthdr.len = m->m_len = len;
4961 m->m_next = NULL;
39236c6e 4962
9bccf70c 4963 p = mtod(m, struct sadb_msg *);
39236c6e 4964
1c79356b
A		 4965 bzero(p, len);
4966 p->sadb_msg_version = PF_KEY_V2;
4967 p->sadb_msg_type = type;
4968 p->sadb_msg_errno = 0;
4969 p->sadb_msg_satype = satype;
4970 p->sadb_msg_len = PFKEY_UNIT64(tlen);
9bccf70c 4971 p->sadb_msg_reserved = reserved;
1c79356b
A		 4972 p->sadb_msg_seq = seq;
4973 p->sadb_msg_pid = (u_int32_t)pid;
39236c6e 4974
9bccf70c 4975 return m;
1c79356b
A		 4976}
4977
4978/*
4979 * copy secasvar data into sadb_address.
1c79356b 4980 */
9bccf70c 4981static struct mbuf *
6d2010ae 4982key_setsadbsa(
39236c6e 4983 struct secasvar *sav)
1c79356b 4984{
9bccf70c 4985 struct mbuf *m;
1c79356b 4986 struct sadb_sa *p;
9bccf70c 4987 int len;
39236c6e 4988
9bccf70c
A		 4989 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
4990 m = key_alloc_mbuf(len);
4991 if (!m || m->m_next) { /*XXX*/
4992 if (m)
4993 m_freem(m);
4994 return NULL;
4995 }
39236c6e 4996
9bccf70c 4997 p = mtod(m, struct sadb_sa *);
39236c6e 4998
1c79356b
A		 4999 bzero(p, len);
5000 p->sadb_sa_len = PFKEY_UNIT64(len);
5001 p->sadb_sa_exttype = SADB_EXT_SA;
5002 p->sadb_sa_spi = sav->spi;
5003 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
5004 p->sadb_sa_state = sav->state;
5005 p->sadb_sa_auth = sav->alg_auth;
5006 p->sadb_sa_encrypt = sav->alg_enc;
5007 p->sadb_sa_flags = sav->flags;
39236c6e 5008
9bccf70c 5009 return m;
1c79356b 5010}
1c79356b
A		 5011
5012/*
5013 * set data into sadb_address.
1c79356b 5014 */
9bccf70c 5015static struct mbuf *
6d2010ae 5016key_setsadbaddr(
39236c6e
A		 5017 u_int16_t exttype,
5018 struct sockaddr *saddr,
5019 u_int8_t prefixlen,
5020 u_int16_t ul_proto)
1c79356b 5021{
9bccf70c 5022 struct mbuf *m;
1c79356b
A		 5023 struct sadb_address *p;
5024 size_t len;
39236c6e 5025
9bccf70c 5026 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
39236c6e 5027 PFKEY_ALIGN8(saddr->sa_len);
9bccf70c
A		 5028 m = key_alloc_mbuf(len);
5029 if (!m || m->m_next) { /*XXX*/
5030 if (m)
5031 m_freem(m);
5032 return NULL;
5033 }
39236c6e 5034
9bccf70c 5035 p = mtod(m, struct sadb_address *);
39236c6e 5036
1c79356b
A		 5037 bzero(p, len);
5038 p->sadb_address_len = PFKEY_UNIT64(len);
5039 p->sadb_address_exttype = exttype;
5040 p->sadb_address_proto = ul_proto;
55e303ae
A		 5041 if (prefixlen == FULLMASK) {
5042 switch (saddr->sa_family) {
39236c6e
A		 5043 case AF_INET:
5044 prefixlen = sizeof(struct in_addr) << 3;
5045 break;
5046 case AF_INET6:
5047 prefixlen = sizeof(struct in6_addr) << 3;
5048 break;
5049 default:
5050 ; /*XXX*/
55e303ae
A		 5051 }
5052 }
1c79356b
A		 5053 p->sadb_address_prefixlen = prefixlen;
5054 p->sadb_address_reserved = 0;
39236c6e 5055
9bccf70c 5056 bcopy(saddr,
39236c6e
A		 5057 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
5058 saddr->sa_len);
5059
5060 return m;
5061}
1c79356b 5062
39236c6e
A		 5063static struct mbuf *
5064key_setsadbipsecif(ifnet_t internal_if,
5065 ifnet_t outgoing_if,
5066 ifnet_t ipsec_if,
5067 int init_disabled)
5068{
5069 struct mbuf *m;
5070 struct sadb_x_ipsecif *p;
5071 size_t len;
5072
5073 len = PFKEY_ALIGN8(sizeof(struct sadb_x_ipsecif));
5074 m = key_alloc_mbuf(len);
5075 if (!m || m->m_next) { /*XXX*/
5076 if (m)
5077 m_freem(m);
5078 return NULL;
5079 }
5080
5081 p = mtod(m, struct sadb_x_ipsecif *);
5082
5083 bzero(p, len);
5084 p->sadb_x_ipsecif_len = PFKEY_UNIT64(len);
5085 p->sadb_x_ipsecif_exttype = SADB_X_EXT_IPSECIF;
5086
5087 if (internal_if && internal_if->if_xname)
fe8ab488 5088 strlcpy(p->sadb_x_ipsecif_internal_if, internal_if->if_xname, IFXNAMSIZ);
39236c6e 5089 if (outgoing_if && outgoing_if->if_xname)
fe8ab488 5090 strlcpy(p->sadb_x_ipsecif_outgoing_if, outgoing_if->if_xname, IFXNAMSIZ);
39236c6e 5091 if (ipsec_if && ipsec_if->if_xname)
fe8ab488 5092 strlcpy(p->sadb_x_ipsecif_ipsec_if, ipsec_if->if_xname, IFXNAMSIZ);
39236c6e
A		 5093
5094 p->sadb_x_ipsecif_init_disabled = init_disabled;
5095
9bccf70c 5096 return m;
1c79356b
A		 5097}
5098
b0d623f7
A		 5099/*
5100 * set data into sadb_session_id
5101 */
5102static struct mbuf *
5103key_setsadbsession_id (u_int64_t session_ids[])
5104{
5105 struct mbuf *m;
5106 struct sadb_session_id *p;
5107 size_t len;
39236c6e 5108
b0d623f7
A		 5109 len = PFKEY_ALIGN8(sizeof(*p));
5110 m = key_alloc_mbuf(len);
5111 if (!m || m->m_next) { /*XXX*/
5112 if (m)
5113 m_freem(m);
5114 return NULL;
5115 }
39236c6e 5116
b0d623f7 5117 p = mtod(m, __typeof__(p));
39236c6e 5118
b0d623f7
A		 5119 bzero(p, len);
5120 p->sadb_session_id_len = PFKEY_UNIT64(len);
5121 p->sadb_session_id_exttype = SADB_EXT_SESSION_ID;
5122 p->sadb_session_id_v[0] = session_ids[0];
5123 p->sadb_session_id_v[1] = session_ids[1];
39236c6e 5124
b0d623f7
A		 5125 return m;
5126}
5127
5128/*
5129 * copy stats data into sadb_sastat type.
5130 */
5131static struct mbuf *
5132key_setsadbsastat (u_int32_t dir,
39236c6e
A		 5133 struct sastat *stats,
5134 u_int32_t max_stats)
b0d623f7
A		 5135{
5136 struct mbuf *m;
5137 struct sadb_sastat *p;
5138 int list_len, len;
39236c6e 5139
b0d623f7 5140 if (!stats) {
39236c6e 5141 return NULL;
b0d623f7 5142 }
39236c6e 5143
b0d623f7
A		 5144 list_len = sizeof(*stats) * max_stats;
5145 len = PFKEY_ALIGN8(sizeof(*p)) + PFKEY_ALIGN8(list_len);
5146 m = key_alloc_mbuf(len);
5147 if (!m || m->m_next) { /*XXX*/
5148 if (m)
5149 m_freem(m);
5150 return NULL;
5151 }
39236c6e 5152
b0d623f7 5153 p = mtod(m, __typeof__(p));
39236c6e 5154
b0d623f7
A		 5155 bzero(p, len);
5156 p->sadb_sastat_len = PFKEY_UNIT64(len);
5157 p->sadb_sastat_exttype = SADB_EXT_SASTAT;
5158 p->sadb_sastat_dir = dir;
5159 p->sadb_sastat_list_len = max_stats;
5160 if (list_len) {
39236c6e 5161 bcopy(stats,
b0d623f7
A		 5162 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(*p)),
5163 list_len);
5164 }
39236c6e 5165
b0d623f7
A		 5166 return m;
5167}
5168
9bccf70c 5169#if 0
1c79356b
A		 5170/*
5171 * set data into sadb_ident.
1c79356b 5172 */
9bccf70c 5173static struct mbuf *
6d2010ae 5174key_setsadbident(
39236c6e
A		 5175 u_int16_t exttype,
5176 u_int16_t idtype,
5177 caddr_t string,
5178 int stringlen,
5179 u_int64_t id)
1c79356b 5180{
9bccf70c 5181 struct mbuf *m;
1c79356b 5182 struct sadb_ident *p;
9bccf70c 5183 size_t len;
39236c6e 5184
9bccf70c
A		 5185 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
5186 m = key_alloc_mbuf(len);
5187 if (!m || m->m_next) { /*XXX*/
5188 if (m)
5189 m_freem(m);
5190 return NULL;
5191 }
39236c6e 5192
9bccf70c 5193 p = mtod(m, struct sadb_ident *);
39236c6e 5194
1c79356b
A		 5195 bzero(p, len);
5196 p->sadb_ident_len = PFKEY_UNIT64(len);
5197 p->sadb_ident_exttype = exttype;
5198 p->sadb_ident_type = idtype;
5199 p->sadb_ident_reserved = 0;
5200 p->sadb_ident_id = id;
39236c6e 5201
9bccf70c 5202 bcopy(string,
39236c6e
A		 5203 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
5204 stringlen);
5205
9bccf70c
A		 5206 return m;
5207}
5208#endif
5209
5210/*
5211 * set data into sadb_x_sa2.
5212 */
5213static struct mbuf *
6d2010ae 5214key_setsadbxsa2(
39236c6e
A		 5215 u_int8_t mode,
5216 u_int32_t seq,
fe8ab488
A		 5217 u_int32_t reqid,
5218 u_int16_t flags)
9bccf70c
A		 5219{
5220 struct mbuf *m;
5221 struct sadb_x_sa2 *p;
5222 size_t len;
39236c6e 5223
9bccf70c
A		 5224 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
5225 m = key_alloc_mbuf(len);
5226 if (!m || m->m_next) { /*XXX*/
5227 if (m)
5228 m_freem(m);
5229 return NULL;
5230 }
39236c6e 5231
9bccf70c 5232 p = mtod(m, struct sadb_x_sa2 *);
39236c6e 5233
9bccf70c
A		 5234 bzero(p, len);
5235 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
5236 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
5237 p->sadb_x_sa2_mode = mode;
5238 p->sadb_x_sa2_reserved1 = 0;
5239 p->sadb_x_sa2_reserved2 = 0;
55e303ae 5240 p->sadb_x_sa2_sequence = seq;
9bccf70c 5241 p->sadb_x_sa2_reqid = reqid;
fe8ab488 5242 p->sadb_x_sa2_flags = flags;
39236c6e 5243
9bccf70c 5244 return m;
1c79356b
A		 5245}
5246
5247/*
5248 * set data into sadb_x_policy
1c79356b 5249 */
9bccf70c 5250static struct mbuf *
6d2010ae 5251key_setsadbxpolicy(
39236c6e
A		 5252 u_int16_t type,
5253 u_int8_t dir,
5254 u_int32_t id)
1c79356b 5255{
9bccf70c 5256 struct mbuf *m;
1c79356b 5257 struct sadb_x_policy *p;
9bccf70c 5258 size_t len;
39236c6e 5259
9bccf70c
A		 5260 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
5261 m = key_alloc_mbuf(len);
5262 if (!m || m->m_next) { /*XXX*/
5263 if (m)
5264 m_freem(m);
5265 return NULL;
5266 }
39236c6e 5267
9bccf70c 5268 p = mtod(m, struct sadb_x_policy *);
39236c6e 5269
1c79356b
A		 5270 bzero(p, len);
5271 p->sadb_x_policy_len = PFKEY_UNIT64(len);
5272 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
5273 p->sadb_x_policy_type = type;
5274 p->sadb_x_policy_dir = dir;
5275 p->sadb_x_policy_id = id;
39236c6e 5276
9bccf70c 5277 return m;
1c79356b
A		 5278}
5279
5280/* %%% utilities */
5281/*
5282 * copy a buffer into the new buffer allocated.
5283 */
5284static void *
6d2010ae 5285key_newbuf(
39236c6e
A		 5286 const void *src,
5287 u_int len)
1c79356b
A		 5288{
5289 caddr_t new;
39236c6e 5290
2d21ac55
A		 5291 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
5292 KMALLOC_NOWAIT(new, caddr_t, len);
1c79356b 5293 if (new == NULL) {
2d21ac55
A		 5294 lck_mtx_unlock(sadb_mutex);
5295 KMALLOC_WAIT(new, caddr_t, len);
5296 lck_mtx_lock(sadb_mutex);
5297 if (new == NULL) {
5298 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
5299 return NULL;
5300 }
1c79356b 5301 }
9bccf70c 5302 bcopy(src, new, len);
39236c6e 5303
1c79356b
A		 5304 return new;
5305}
5306
5307/* compare my own address
5308 * OUT: 1: true, i.e. my address.
5309 * 0: false
5310 */
5311int
6d2010ae 5312key_ismyaddr(
39236c6e 5313 struct sockaddr *sa)
1c79356b 5314{
9bccf70c
A		 5315#if INET
5316 struct sockaddr_in *sin;
5317 struct in_ifaddr *ia;
5318#endif
39236c6e 5319
1c79356b 5320 /* sanity check */
9bccf70c 5321 if (sa == NULL)
1c79356b 5322 panic("key_ismyaddr: NULL pointer is passed.\n");
39236c6e 5323
9bccf70c
A		 5324 switch (sa->sa_family) {
5325#if INET
39236c6e
A		 5326 case AF_INET:
5327 lck_rw_lock_shared(in_ifaddr_rwlock);
5328 sin = (struct sockaddr_in *)(void *)sa;
5329 for (ia = in_ifaddrhead.tqh_first; ia;
5330 ia = ia->ia_link.tqe_next) {
5331 IFA_LOCK_SPIN(&ia->ia_ifa);
5332 if (sin->sin_family == ia->ia_addr.sin_family &&
5333 sin->sin_len == ia->ia_addr.sin_len &&
5334 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
5335 {
5336 IFA_UNLOCK(&ia->ia_ifa);
5337 lck_rw_done(in_ifaddr_rwlock);
5338 return 1;
5339 }
6d2010ae 5340 IFA_UNLOCK(&ia->ia_ifa);
9bccf70c 5341 }
39236c6e
A		 5342 lck_rw_done(in_ifaddr_rwlock);
5343 break;
9bccf70c 5344#endif
1c79356b 5345#if INET6
39236c6e
A		 5346 case AF_INET6:
5347 return key_ismyaddr6((struct sockaddr_in6 *)(void *)sa);
1c79356b
A		 5348#endif
5349 }
39236c6e 5350
1c79356b
A		 5351 return 0;
5352}
5353
5354#if INET6
5355/*
5356 * compare my own address for IPv6.
5357 * 1: ours
5358 * 0: other
5359 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
5360 */
5361#include <netinet6/in6_var.h>
5362
5363static int
6d2010ae 5364key_ismyaddr6(
39236c6e 5365 struct sockaddr_in6 *sin6)
1c79356b 5366{
1c79356b 5367 struct in6_ifaddr *ia;
9bccf70c 5368 struct in6_multi *in6m;
39236c6e 5369
6d2010ae 5370 lck_rw_lock_shared(&in6_ifaddr_rwlock);
91447636 5371 for (ia = in6_ifaddrs; ia; ia = ia->ia_next) {
6d2010ae 5372 IFA_LOCK(&ia->ia_ifa);
9bccf70c 5373 if (key_sockaddrcmp((struct sockaddr *)&sin6,
39236c6e 5374 (struct sockaddr *)&ia->ia_addr, 0) == 0) {
6d2010ae
A		 5375 IFA_UNLOCK(&ia->ia_ifa);
5376 lck_rw_done(&in6_ifaddr_rwlock);
1c79356b 5377 return 1;
91447636 5378 }
6d2010ae 5379 IFA_UNLOCK(&ia->ia_ifa);
39236c6e 5380
9bccf70c
A		 5381 /*
5382 * XXX Multicast
5383 * XXX why do we care about multlicast here while we don't care
5384 * about IPv4 multicast??
5385 * XXX scope
5386 */
5387 in6m = NULL;
6d2010ae
A		 5388 in6_multihead_lock_shared();
5389 IN6_LOOKUP_MULTI(&sin6->sin6_addr, ia->ia_ifp, in6m);
5390 in6_multihead_lock_done();
5391 if (in6m != NULL) {
5392 lck_rw_done(&in6_ifaddr_rwlock);
5393 IN6M_REMREF(in6m);
1c79356b 5394 return 1;
91447636 5395 }
1c79356b 5396 }
6d2010ae 5397 lck_rw_done(&in6_ifaddr_rwlock);
39236c6e 5398
1c79356b 5399 /* loopback, just for safety */
9bccf70c 5400 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
1c79356b 5401 return 1;
39236c6e 5402
1c79356b
A		 5403 return 0;
5404}
5405#endif /*INET6*/
5406
1c79356b 5407/*
55e303ae
A		 5408 * compare two secasindex structure.
5409 * flag can specify to compare 2 saidxes.
5410 * compare two secasindex structure without both mode and reqid.
9bccf70c 5411 * don't compare port.
39236c6e 5412 * IN:
55e303ae
A		 5413 * saidx0: source, it can be in SAD.
5414 * saidx1: object.
39236c6e 5415 * OUT:
55e303ae
A		 5416 * 1 : equal
5417 * 0 : not equal
1c79356b
A		 5418 */
5419static int
6d2010ae 5420key_cmpsaidx(
39236c6e
A		 5421 struct secasindex *saidx0,
5422 struct secasindex *saidx1,
5423 int flag)
1c79356b
A		 5424{
5425 /* sanity */
9bccf70c 5426 if (saidx0 == NULL && saidx1 == NULL)
1c79356b 5427 return 1;
39236c6e 5428
9bccf70c 5429 if (saidx0 == NULL || saidx1 == NULL)
1c79356b 5430 return 0;
39236c6e 5431
fe8ab488
A		 5432 if (saidx0->ipsec_ifindex != 0 && saidx0->ipsec_ifindex != saidx1->ipsec_ifindex)
5433 return 0;
5434
9bccf70c
A		 5435 if (saidx0->proto != saidx1->proto)
5436 return 0;
39236c6e 5437
55e303ae
A		 5438 if (flag == CMP_EXACTLY) {
5439 if (saidx0->mode != saidx1->mode)
5440 return 0;
5441 if (saidx0->reqid != saidx1->reqid)
5442 return 0;
5443 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 ||
5444 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0)
5445 return 0;
5446 } else {
39236c6e 5447
55e303ae 5448 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
2d21ac55 5449 if (flag & CMP_REQID) {
55e303ae
A		 5450 /*
5451 * If reqid of SPD is non-zero, unique SA is required.
5452 * The result must be of same reqid in this case.
5453 */
5454 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
5455 return 0;
5456 }
39236c6e 5457
2d21ac55 5458 if (flag & CMP_MODE) {
55e303ae 5459 if (saidx0->mode != IPSEC_MODE_ANY
39236c6e 5460 && saidx0->mode != saidx1->mode)
55e303ae
A		 5461 return 0;
5462 }
39236c6e 5463
55e303ae 5464 if (key_sockaddrcmp((struct sockaddr *)&saidx0->src,
39236c6e 5465 (struct sockaddr *)&saidx1->src, flag & CMP_PORT ? 1 : 0) != 0) {
55e303ae
A		 5466 return 0;
5467 }
5468 if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst,
39236c6e 5469 (struct sockaddr *)&saidx1->dst, flag & CMP_PORT ? 1 : 0) != 0) {
55e303ae
A		 5470 return 0;
5471 }
9bccf70c 5472 }
39236c6e 5473
9bccf70c
A		 5474 return 1;
5475}
5476
5477/*
5478 * compare two secindex structure exactly.
5479 * IN:
5480 * spidx0: source, it is often in SPD.
5481 * spidx1: object, it is often from PFKEY message.
5482 * OUT:
5483 * 1 : equal
5484 * 0 : not equal
5485 */
5486static int
6d2010ae 5487key_cmpspidx_exactly(
39236c6e
A		 5488 struct secpolicyindex *spidx0,
5489 struct secpolicyindex *spidx1)
9bccf70c
A		 5490{
5491 /* sanity */
5492 if (spidx0 == NULL && spidx1 == NULL)
5493 return 1;
39236c6e 5494
9bccf70c
A		 5495 if (spidx0 == NULL || spidx1 == NULL)
5496 return 0;
39236c6e 5497
9bccf70c 5498 if (spidx0->prefs != spidx1->prefs
39236c6e
A		 5499 || spidx0->prefd != spidx1->prefd
5500 || spidx0->ul_proto != spidx1->ul_proto
5501 || spidx0->internal_if != spidx1->internal_if)
9bccf70c 5502 return 0;
39236c6e 5503
9bccf70c 5504 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src,
39236c6e 5505 (struct sockaddr *)&spidx1->src, 1) != 0) {
1c79356b 5506 return 0;
9bccf70c
A		 5507 }
5508 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst,
39236c6e 5509 (struct sockaddr *)&spidx1->dst, 1) != 0) {
9bccf70c
A		 5510 return 0;
5511 }
39236c6e
A		 5512
5513 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src_range.start,
5514 (struct sockaddr *)&spidx1->src_range.start, 1) != 0) {
5515 return 0;
5516 }
5517 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src_range.end,
5518 (struct sockaddr *)&spidx1->src_range.end, 1) != 0) {
5519 return 0;
5520 }
5521 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst_range.start,
5522 (struct sockaddr *)&spidx1->dst_range.start, 1) != 0) {
5523 return 0;
5524 }
5525 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst_range.end,
5526 (struct sockaddr *)&spidx1->dst_range.end, 1) != 0) {
5527 return 0;
5528 }
5529
9bccf70c
A		 5530 return 1;
5531}
5532
5533/*
5534 * compare two secindex structure with mask.
5535 * IN:
5536 * spidx0: source, it is often in SPD.
5537 * spidx1: object, it is often from IP header.
5538 * OUT:
5539 * 1 : equal
5540 * 0 : not equal
5541 */
5542static int
6d2010ae 5543key_cmpspidx_withmask(
39236c6e
A		 5544 struct secpolicyindex *spidx0,
5545 struct secpolicyindex *spidx1)
9bccf70c 5546{
39236c6e
A		 5547 int spidx0_src_is_range = 0;
5548 int spidx0_dst_is_range = 0;
5549
9bccf70c
A		 5550 /* sanity */
5551 if (spidx0 == NULL && spidx1 == NULL)
5552 return 1;
39236c6e 5553
9bccf70c 5554 if (spidx0 == NULL || spidx1 == NULL)
1c79356b 5555 return 0;
39236c6e
A		 5556
5557 if (spidx0->src_range.start.ss_len > 0)
5558 spidx0_src_is_range = 1;
5559
5560 if (spidx0->dst_range.start.ss_len > 0)
5561 spidx0_dst_is_range = 1;
5562
5563 if ((spidx0_src_is_range ? spidx0->src_range.start.ss_family : spidx0->src.ss_family) != spidx1->src.ss_family ||
5564 (spidx0_dst_is_range ? spidx0->dst_range.start.ss_family : spidx0->dst.ss_family) != spidx1->dst.ss_family ||
5565 (spidx0_src_is_range ? spidx0->src_range.start.ss_len : spidx0->src.ss_len) != spidx1->src.ss_len ||
5566 (spidx0_dst_is_range ? spidx0->dst_range.start.ss_len : spidx0->dst.ss_len) != spidx1->dst.ss_len)
1c79356b 5567 return 0;
39236c6e 5568
9bccf70c
A		 5569 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
5570 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
39236c6e 5571 && spidx0->ul_proto != spidx1->ul_proto)
1c79356b 5572 return 0;
39236c6e
A		 5573
5574 /* If spidx1 specifies interface, ignore src addr */
5575 if (spidx1->internal_if != NULL) {
5576 if (spidx0->internal_if == NULL
5577 || spidx0->internal_if != spidx1->internal_if)
5578 return 0;
5579
5580 /* Still check ports */
5581 switch (spidx0->src.ss_family) {
5582 case AF_INET:
5583 if (spidx0_src_is_range &&
5584 (satosin(&spidx1->src)->sin_port < satosin(&spidx0->src_range.start)->sin_port
5585 || satosin(&spidx1->src)->sin_port > satosin(&spidx0->src_range.end)->sin_port))
5586 return 0;
5587 else if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
5588 && satosin(&spidx0->src)->sin_port !=
5589 satosin(&spidx1->src)->sin_port)
5590 return 0;
5591 break;
5592 case AF_INET6:
5593 if (spidx0_src_is_range &&
5594 (satosin6(&spidx1->src)->sin6_port < satosin6(&spidx0->src_range.start)->sin6_port
5595 || satosin6(&spidx1->src)->sin6_port > satosin6(&spidx0->src_range.end)->sin6_port))
5596 return 0;
5597 else if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
5598 && satosin6(&spidx0->src)->sin6_port !=
5599 satosin6(&spidx1->src)->sin6_port)
5600 return 0;
5601 break;
5602 default:
5603 break;
5604 }
5605 } else if (spidx0_src_is_range) {
5606 if (!key_is_addr_in_range(&spidx1->src, &spidx0->src_range))
5607 return 0;
5608 } else {
5609 switch (spidx0->src.ss_family) {
5610 case AF_INET:
5611 if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
5612 && satosin(&spidx0->src)->sin_port !=
5613 satosin(&spidx1->src)->sin_port)
5614 return 0;
5615 if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr,
5616 (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs))
5617 return 0;
5618 break;
5619 case AF_INET6:
5620 if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
5621 && satosin6(&spidx0->src)->sin6_port !=
5622 satosin6(&spidx1->src)->sin6_port)
5623 return 0;
5624 /*
5625 * scope_id check. if sin6_scope_id is 0, we regard it
5626 * as a wildcard scope, which matches any scope zone ID.
5627 */
5628 if (satosin6(&spidx0->src)->sin6_scope_id &&
5629 satosin6(&spidx1->src)->sin6_scope_id &&
5630 satosin6(&spidx0->src)->sin6_scope_id !=
5631 satosin6(&spidx1->src)->sin6_scope_id)
5632 return 0;
5633 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr,
5634 (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs))
5635 return 0;
5636 break;
5637 default:
5638 /* XXX */
5639 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0)
5640 return 0;
5641 break;
5642 }
5643 }
5644
5645 if (spidx0_dst_is_range) {
5646 if (!key_is_addr_in_range(&spidx1->dst, &spidx0->dst_range))
5647 return 0;
5648 } else {
5649 switch (spidx0->dst.ss_family) {
5650 case AF_INET:
5651 if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY
5652 && satosin(&spidx0->dst)->sin_port !=
5653 satosin(&spidx1->dst)->sin_port)
5654 return 0;
5655 if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr,
5656 (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd))
5657 return 0;
5658 break;
5659 case AF_INET6:
5660 if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY
5661 && satosin6(&spidx0->dst)->sin6_port !=
5662 satosin6(&spidx1->dst)->sin6_port)
5663 return 0;
5664 /*
5665 * scope_id check. if sin6_scope_id is 0, we regard it
5666 * as a wildcard scope, which matches any scope zone ID.
5667 */
5668 if (satosin6(&spidx0->src)->sin6_scope_id &&
5669 satosin6(&spidx1->src)->sin6_scope_id &&
5670 satosin6(&spidx0->dst)->sin6_scope_id !=
5671 satosin6(&spidx1->dst)->sin6_scope_id)
5672 return 0;
5673 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->dst)->sin6_addr,
5674 (caddr_t)&satosin6(&spidx1->dst)->sin6_addr, spidx0->prefd))
5675 return 0;
5676 break;
5677 default:
5678 /* XXX */
5679 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0)
5680 return 0;
5681 break;
5682 }
5683 }
5684
9bccf70c 5685 /* XXX Do we check other field ? e.g. flowinfo */
39236c6e 5686
1c79356b
A		 5687 return 1;
5688}
5689
39236c6e
A		 5690static int
5691key_is_addr_in_range(struct sockaddr_storage *addr, struct secpolicyaddrrange *addr_range)
5692{
5693 int cmp = 0;
5694
5695 if (addr == NULL || addr_range == NULL)
5696 return 0;
5697
5698 /* Must be greater than or equal to start */
5699 cmp = key_sockaddrcmp((struct sockaddr *)addr, (struct sockaddr *)&addr_range->start, 1);
5700 if (cmp != 0 && cmp != 1)
5701 return 0;
5702
5703 /* Must be less than or equal to end */
5704 cmp = key_sockaddrcmp((struct sockaddr *)addr, (struct sockaddr *)&addr_range->end, 1);
5705 if (cmp != 0 && cmp != -1)
5706 return 0;
5707
5708 return 1;
5709}
5710
5711/*
5712 Return values:
5713 -1: sa1 < sa2
5714 0: sa1 == sa2
5715 1: sa1 > sa2
5716 2: Not comparable or error
5717 */
9bccf70c 5718static int
6d2010ae 5719key_sockaddrcmp(
39236c6e
A		 5720 struct sockaddr *sa1,
5721 struct sockaddr *sa2,
5722 int port)
9bccf70c 5723{
39236c6e
A		 5724 int result = 0;
5725 int port_result = 0;
5726
9bccf70c 5727 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
39236c6e
A		 5728 return 2;
5729
5730 if (sa1->sa_len == 0)
5731 return 0;
5732
9bccf70c 5733 switch (sa1->sa_family) {
39236c6e
A		 5734 case AF_INET:
5735 if (sa1->sa_len != sizeof(struct sockaddr_in))
5736 return 2;
5737
5738 result = memcmp(&satosin(sa1)->sin_addr.s_addr, &satosin(sa2)->sin_addr.s_addr, sizeof(satosin(sa1)->sin_addr.s_addr));
5739
5740 if (port) {
5741 if (satosin(sa1)->sin_port < satosin(sa2)->sin_port) {
5742 port_result = -1;
5743 } else if (satosin(sa1)->sin_port > satosin(sa2)->sin_port) {
5744 port_result = 1;
5745 }
5746
5747 if (result == 0)
5748 result = port_result;
5749 else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0))
5750 return 2;
5751 }
5752
5753 break;
5754 case AF_INET6:
5755 if (sa1->sa_len != sizeof(struct sockaddr_in6))
5756 return 2; /*EINVAL*/
5757
5758 if (satosin6(sa1)->sin6_scope_id !=
5759 satosin6(sa2)->sin6_scope_id) {
5760 return 2;
5761 }
5762
5763 result = memcmp(&satosin6(sa1)->sin6_addr.s6_addr[0], &satosin6(sa2)->sin6_addr.s6_addr[0], sizeof(struct in6_addr));
5764
5765 if (port) {
5766 if (satosin6(sa1)->sin6_port < satosin6(sa2)->sin6_port) {
5767 port_result = -1;
5768 } else if (satosin6(sa1)->sin6_port > satosin6(sa2)->sin6_port) {
5769 port_result = 1;
5770 }
5771
5772 if (result == 0)
5773 result = port_result;
5774 else if ((result > 0 && port_result < 0) || (result < 0 && port_result > 0))
5775 return 2;
5776 }
5777
5778 break;
5779 default:
5780 result = memcmp(sa1, sa2, sa1->sa_len);
5781 break;
9bccf70c 5782 }
39236c6e
A		 5783
5784 if (result < 0) result = -1;
5785 else if (result > 0) result = 1;
5786
5787 return result;
9bccf70c
A		 5788}
5789
1c79356b
A		 5790/*
5791 * compare two buffers with mask.
5792 * IN:
5793 * addr1: source
5794 * addr2: object
5795 * bits: Number of bits to compare
5796 * OUT:
5797 * 1 : equal
5798 * 0 : not equal
5799 */
5800static int
6d2010ae 5801key_bbcmp(
39236c6e
A		 5802 caddr_t p1,
5803 caddr_t p2,
5804 u_int bits)
1c79356b
A		 5805{
5806 u_int8_t mask;
39236c6e 5807
1c79356b
A		 5808 /* XXX: This could be considerably faster if we compare a word
5809 * at a time, but it is complicated on LSB Endian machines */
39236c6e 5810
1c79356b
A		 5811 /* Handle null pointers */
5812 if (p1 == NULL || p2 == NULL)
5813 return (p1 == p2);
39236c6e 5814
1c79356b
A		 5815 while (bits >= 8) {
5816 if (*p1++ != *p2++)
5817 return 0;
5818 bits -= 8;
5819 }
39236c6e 5820
1c79356b
A		 5821 if (bits > 0) {
5822 mask = ~((1<<(8-bits))-1);
5823 if ((*p1 & mask) != (*p2 & mask))
5824 return 0;
5825 }
5826 return 1; /* Match! */
5827}
5828
5829/*
5830 * time handler.
5831 * scanning SPD and SAD to check status for each entries,
5832 * and do to remove or to expire.
9bccf70c 5833 * XXX: year 2038 problem may remain.
1c79356b 5834 */
e2fac8b1
A		 5835int key_timehandler_debug = 0;
5836u_int32_t spd_count = 0, sah_count = 0, dead_sah_count = 0, empty_sah_count = 0, larval_sav_count = 0, mature_sav_count = 0, dying_sav_count = 0, dead_sav_count = 0;
5837u_int64_t total_sav_count = 0;
1c79356b
A		 5838void
5839key_timehandler(void)
5840{
5841 u_int dir;
9bccf70c 5842 struct timeval tv;
2d21ac55
A		 5843 struct secpolicy **spbuf = NULL, **spptr = NULL;
5844 struct secasvar **savexbuf = NULL, **savexptr = NULL;
5845 struct secasvar **savkabuf = NULL, **savkaptr = NULL;
5846 int spbufcount = 0, savbufcount = 0, spcount = 0, savexcount = 0, savkacount = 0, cnt;
39236c6e 5847 int stop_handler = 1; /* stop the timehandler */
1c79356b 5848
39236c6e
A		 5849 microtime(&tv);
5850
2d21ac55
A		 5851 /* pre-allocate buffers before taking the lock */
5852 /* if allocation failures occur - portions of the processing will be skipped */
5853 if ((spbufcount = ipsec_policy_count) != 0) {
5854 spbufcount += 256;
5855 KMALLOC_WAIT(spbuf, struct secpolicy **, spbufcount * sizeof(struct secpolicy *));
5856 if (spbuf)
5857 spptr = spbuf;
5858 }
5859 if ((savbufcount = ipsec_sav_count) != 0) {
5860 savbufcount += 512;
5861 KMALLOC_WAIT(savexbuf, struct secasvar **, savbufcount * sizeof(struct secasvar *));
5862 if (savexbuf)
5863 savexptr = savexbuf;
5864 KMALLOC_WAIT(savkabuf, struct secasvar **, savbufcount * sizeof(struct secasvar *));
5865 if (savkabuf)
5866 savkaptr = savkabuf;
5867 }
91447636 5868 lck_mtx_lock(sadb_mutex);
1c79356b 5869 /* SPD */
2d21ac55 5870 if (spbuf) {
39236c6e 5871
2d21ac55 5872 struct secpolicy *sp, *nextsp;
39236c6e 5873
2d21ac55
A		 5874 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
5875 for (sp = LIST_FIRST(&sptree[dir]);
5876 sp != NULL;
5877 sp = nextsp) {
39236c6e
A		 5878
5879 /* don't prevent timehandler from stopping for generate policy */
5880 if (sp->policy != IPSEC_POLICY_GENERATE)
5881 stop_handler = 0;
5882 spd_count++;
2d21ac55 5883 nextsp = LIST_NEXT(sp, chain);
39236c6e 5884
2d21ac55
A		 5885 if (sp->state == IPSEC_SPSTATE_DEAD) {
5886 key_freesp(sp, KEY_SADB_LOCKED);
5887 continue;
5888 }
39236c6e 5889
2d21ac55
A		 5890 if (sp->lifetime == 0 && sp->validtime == 0)
5891 continue;
5892 if (spbuf && spcount < spbufcount) {
5893 /* the deletion will occur next time */
5894 if ((sp->lifetime
5895 && tv.tv_sec - sp->created > sp->lifetime)
5896 || (sp->validtime
39236c6e
A		 5897 && tv.tv_sec - sp->lastused > sp->validtime)) {
5898 //key_spdexpire(sp);
5899 sp->state = IPSEC_SPSTATE_DEAD;
5900 sp->refcnt++;
5901 *spptr++ = sp;
5902 spcount++;
5903 }
2d21ac55 5904 }
9bccf70c 5905 }
1c79356b
A		 5906 }
5907 }
39236c6e 5908
1c79356b 5909 /* SAD */
39236c6e 5910 {
2d21ac55
A		 5911 struct secashead *sah, *nextsah;
5912 struct secasvar *sav, *nextsav;
39236c6e 5913
2d21ac55
A		 5914 for (sah = LIST_FIRST(&sahtree);
5915 sah != NULL;
5916 sah = nextsah) {
39236c6e
A		 5917
5918 sah_count++;
2d21ac55 5919 nextsah = LIST_NEXT(sah, chain);
39236c6e 5920
2d21ac55
A		 5921 /* if sah has been dead, then delete it and process next sah. */
5922 if (sah->state == SADB_SASTATE_DEAD) {
5923 key_delsah(sah);
e2fac8b1
A		 5924 dead_sah_count++;
5925 continue;
5926 }
39236c6e 5927
e2fac8b1 5928 if (LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]) == NULL &&
39236c6e
A		 5929 LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]) == NULL &&
5930 LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]) == NULL &&
e2fac8b1 5931 LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]) == NULL) {
39236c6e 5932 key_delsah(sah);
e2fac8b1 5933 empty_sah_count++;
1c79356b
A		 5934 continue;
5935 }
39236c6e
A		 5936
5937 if (savbufcount == 0) {
5938 continue;
5939 }
5940
5941 stop_handler = 0;
5942
2d21ac55
A		 5943 /* if LARVAL entry doesn't become MATURE, delete it. */
5944 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
5945 sav != NULL;
5946 sav = nextsav) {
39236c6e
A		 5947
5948 larval_sav_count++;
e2fac8b1 5949 total_sav_count++;
2d21ac55 5950 nextsav = LIST_NEXT(sav, chain);
39236c6e
A		 5951
5952 if (sav->lft_h != NULL) {
5953 /* If a hard lifetime is defined for the LARVAL SA, use it */
5954 if (sav->lft_h->sadb_lifetime_addtime != 0
5955 && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) {
5956 if (sav->always_expire) {
5957 key_send_delete(sav);
5958 sav = NULL;
5959 } else {
5960 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5961 key_freesav(sav, KEY_SADB_LOCKED);
5962 sav = NULL;
5963 }
5964 }
5965 } else {
5966 if (tv.tv_sec - sav->created > key_larval_lifetime) {
5967 key_freesav(sav, KEY_SADB_LOCKED);
5968 }
2d21ac55
A		 5969 }
5970 }
5971
5972 /*
5973 * If this is a NAT traversal SA with no activity,
5974 * we need to send a keep alive.
5975 *
5976 * Performed outside of the loop before so we will
5977 * only ever send one keepalive. The first SA on
5978 * the list is the one that will be used for sending
5979 * traffic, so this is the one we use for determining
5980 * when to send the keepalive.
5981 */
5982 if (savkabuf && savkacount < savbufcount) {
5983 sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]); //%%% should we check dying list if this is empty???
fe8ab488 5984 if (sav && (natt_keepalive_interval || sav->natt_interval) &&
316670eb 5985 (sav->flags & (SADB_X_EXT_NATT_KEEPALIVE | SADB_X_EXT_ESP_KEEPALIVE)) != 0) {
2d21ac55
A		 5986 sav->refcnt++;
5987 *savkaptr++ = sav;
5988 savkacount++;
5989 }
5990 }
5991
5992 /*
5993 * check MATURE entry to start to send expire message
5994 * whether or not.
5995 */
5996 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
5997 sav != NULL;
5998 sav = nextsav) {
39236c6e
A		 5999
6000 mature_sav_count++;
e2fac8b1 6001 total_sav_count++;
2d21ac55 6002 nextsav = LIST_NEXT(sav, chain);
39236c6e 6003
2d21ac55
A		 6004 /* we don't need to check. */
6005 if (sav->lft_s == NULL)
6006 continue;
39236c6e 6007
2d21ac55
A		 6008 /* sanity check */
6009 if (sav->lft_c == NULL) {
6010 ipseclog((LOG_DEBUG,"key_timehandler: "
39236c6e 6011 "There is no CURRENT time, why?\n"));
2d21ac55
A		 6012 continue;
6013 }
39236c6e 6014
2d21ac55
A		 6015 /* check SOFT lifetime */
6016 if (sav->lft_s->sadb_lifetime_addtime != 0
39236c6e 6017 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
2d21ac55 6018 /*
39236c6e
A		 6019 * If always_expire is set, expire. Otherwise,
6020 * if the SA has not been used, delete immediately.
2d21ac55 6021 */
39236c6e
A		 6022 if (sav->lft_c->sadb_lifetime_usetime == 0
6023 && sav->always_expire == 0) {
2d21ac55
A		 6024 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6025 key_freesav(sav, KEY_SADB_LOCKED);
6026 sav = NULL;
6027 } else if (savexbuf && savexcount < savbufcount) {
39236c6e 6028 key_sa_chgstate(sav, SADB_SASTATE_DYING);
2d21ac55
A		 6029 sav->refcnt++;
6030 *savexptr++ = sav;
6031 savexcount++;
6032 }
6033 }
39236c6e 6034
2d21ac55 6035 /* check SOFT lifetime by bytes */
1c79356b 6036 /*
2d21ac55
A		 6037 * XXX I don't know the way to delete this SA
6038 * when new SA is installed. Caution when it's
6039 * installed too big lifetime by time.
1c79356b 6040 */
2d21ac55 6041 else if (savexbuf && savexcount < savbufcount
39236c6e
A		 6042 && sav->lft_s->sadb_lifetime_bytes != 0
6043 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
6044
1c79356b
A		 6045 /*
6046 * XXX If we keep to send expire
6047 * message in the status of
6048 * DYING. Do remove below code.
6049 */
2d21ac55
A		 6050 //key_expire(sav);
6051 key_sa_chgstate(sav, SADB_SASTATE_DYING);
6052 sav->refcnt++;
6053 *savexptr++ = sav;
6054 savexcount++;
1c79356b
A		 6055 }
6056 }
39236c6e 6057
2d21ac55
A		 6058 /* check DYING entry to change status to DEAD. */
6059 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
6060 sav != NULL;
6061 sav = nextsav) {
39236c6e
A		 6062
6063 dying_sav_count++;
e2fac8b1 6064 total_sav_count++;
2d21ac55 6065 nextsav = LIST_NEXT(sav, chain);
39236c6e 6066
2d21ac55
A		 6067 /* we don't need to check. */
6068 if (sav->lft_h == NULL)
6069 continue;
39236c6e 6070
2d21ac55
A		 6071 /* sanity check */
6072 if (sav->lft_c == NULL) {
6073 ipseclog((LOG_DEBUG, "key_timehandler: "
39236c6e 6074 "There is no CURRENT time, why?\n"));
2d21ac55
A		 6075 continue;
6076 }
39236c6e 6077
2d21ac55 6078 if (sav->lft_h->sadb_lifetime_addtime != 0
39236c6e
A		 6079 && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) {
6080 if (sav->always_expire) {
6081 key_send_delete(sav);
6082 sav = NULL;
6083 } else {
6084 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6085 key_freesav(sav, KEY_SADB_LOCKED);
6086 sav = NULL;
6087 }
2d21ac55 6088 }
1c79356b 6089#if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
2d21ac55 6090 else if (savbuf && savexcount < savbufcount
39236c6e
A		 6091 && sav->lft_s != NULL
6092 && sav->lft_s->sadb_lifetime_addtime != 0
6093 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
2d21ac55
A		 6094 /*
6095 * XXX: should be checked to be
6096 * installed the valid SA.
6097 */
39236c6e 6098
2d21ac55
A		 6099 /*
6100 * If there is no SA then sending
6101 * expire message.
6102 */
6103 //key_expire(sav);
6104 sav->refcnt++;
6105 *savexptr++ = sav;
6106 savexcount++;
6107 }
1c79356b 6108#endif
2d21ac55
A		 6109 /* check HARD lifetime by bytes */
6110 else if (sav->lft_h->sadb_lifetime_bytes != 0
39236c6e 6111 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
2d21ac55
A		 6112 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6113 key_freesav(sav, KEY_SADB_LOCKED);
6114 sav = NULL;
6115 }
1c79356b 6116 }
39236c6e 6117
2d21ac55
A		 6118 /* delete entry in DEAD */
6119 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
6120 sav != NULL;
6121 sav = nextsav) {
39236c6e
A		 6122
6123 dead_sav_count++;
e2fac8b1 6124 total_sav_count++;
2d21ac55 6125 nextsav = LIST_NEXT(sav, chain);
39236c6e 6126
2d21ac55
A		 6127 /* sanity check */
6128 if (sav->state != SADB_SASTATE_DEAD) {
6129 ipseclog((LOG_DEBUG, "key_timehandler: "
39236c6e
A		 6130 "invalid sav->state "
6131 "(queue: %d SA: %d): "
6132 "kill it anyway\n",
6133 SADB_SASTATE_DEAD, sav->state));
2d21ac55 6134 }
39236c6e 6135
2d21ac55
A		 6136 /*
6137 * do not call key_freesav() here.
6138 * sav should already be freed, and sav->refcnt
6139 * shows other references to sav
6140 * (such as from SPD).
6141 */
1c79356b 6142 }
1c79356b 6143 }
39236c6e
A		 6144 }
6145
6146 if (++key_timehandler_debug >= 300) {
6147 if (key_debug_level) {
6148 printf("%s: total stats for %u calls\n", __FUNCTION__, key_timehandler_debug);
6149 printf("%s: walked %u SPDs\n", __FUNCTION__, spd_count);
6150 printf("%s: walked %llu SAs: LARVAL SAs %u, MATURE SAs %u, DYING SAs %u, DEAD SAs %u\n", __FUNCTION__,
6151 total_sav_count, larval_sav_count, mature_sav_count, dying_sav_count, dead_sav_count);
6152 printf("%s: walked %u SAHs: DEAD SAHs %u, EMPTY SAHs %u\n", __FUNCTION__,
6153 sah_count, dead_sah_count, empty_sah_count);
6154 if (sah_search_calls) {
6155 printf("%s: SAH search cost %d iters per call\n", __FUNCTION__,
6156 (sah_search_count/sah_search_calls));
6157 }
6158 }
6159 spd_count = 0;
6160 sah_count = 0;
6161 dead_sah_count = 0;
6162 empty_sah_count = 0;
6163 larval_sav_count = 0;
6164 mature_sav_count = 0;
6165 dying_sav_count = 0;
6166 dead_sav_count = 0;
6167 total_sav_count = 0;
6168 sah_search_count = 0;
6169 sah_search_calls = 0;
6170 key_timehandler_debug = 0;
6171 }
1c79356b
A		 6172#ifndef IPSEC_NONBLOCK_ACQUIRE
6173 /* ACQ tree */
6174 {
39236c6e
A		 6175 struct secacq *acq, *nextacq;
6176
6177 for (acq = LIST_FIRST(&acqtree);
6178 acq != NULL;
6179 acq = nextacq) {
6180
6181 stop_handler = 0;
6182 nextacq = LIST_NEXT(acq, chain);
6183
6184 if (tv.tv_sec - acq->created > key_blockacq_lifetime
6185 && __LIST_CHAINED(acq)) {
6186 LIST_REMOVE(acq, chain);
6187 KFREE(acq);
6188 }
1c79356b 6189 }
1c79356b
A		 6190 }
6191#endif
39236c6e 6192
1c79356b
A		 6193 /* SP ACQ tree */
6194 {
39236c6e
A		 6195 struct secspacq *acq, *nextacq;
6196
6197 for (acq = LIST_FIRST(&spacqtree);
6198 acq != NULL;
6199 acq = nextacq) {
6200
6201 stop_handler = 0;
6202 nextacq = LIST_NEXT(acq, chain);
6203
6204 if (tv.tv_sec - acq->created > key_blockacq_lifetime
6205 && __LIST_CHAINED(acq)) {
6206 LIST_REMOVE(acq, chain);
6207 KFREE(acq);
6208 }
1c79356b 6209 }
1c79356b 6210 }
39236c6e 6211
1c79356b
A		 6212 /* initialize random seed */
6213 if (key_tick_init_random++ > key_int_random) {
6214 key_tick_init_random = 0;
6215 key_srandom();
6216 }
39037602
A		 6217
6218 uint64_t acc_sleep_time = 0;
6219 absolutetime_to_nanoseconds(mach_absolutetime_asleep, &acc_sleep_time);
6220 natt_now = ++up_time + (acc_sleep_time / NSEC_PER_SEC);
39236c6e 6221
91447636 6222 lck_mtx_unlock(sadb_mutex);
39236c6e 6223
2d21ac55
A		 6224 /* send messages outside of sadb_mutex */
6225 if (spbuf && spcount > 0) {
6226 cnt = spcount;
6227 while (cnt--)
6228 key_spdexpire(*(--spptr));
6229 }
6230 if (savkabuf && savkacount > 0) {
b0d623f7
A		 6231 struct secasvar **savkaptr_sav = savkaptr;
6232 int cnt_send = savkacount;
39236c6e 6233
b0d623f7
A		 6234 while (cnt_send--) {
6235 if (ipsec_send_natt_keepalive(*(--savkaptr))) {
6236 // <rdar://6768487> iterate (all over again) and update timestamps
6237 struct secasvar **savkaptr_update = savkaptr_sav;
6238 int cnt_update = savkacount;
6239 while (cnt_update--) {
6240 key_update_natt_keepalive_timestamp(*savkaptr,
39236c6e 6241 *(--savkaptr_update));
b0d623f7
A		 6242 }
6243 }
6244 }
2d21ac55
A		 6245 }
6246 if (savexbuf && savexcount > 0) {
6247 cnt = savexcount;
6248 while (cnt--)
6249 key_expire(*(--savexptr));
6250 }
6251
6252 /* decrement ref counts and free buffers */
6253 lck_mtx_lock(sadb_mutex);
6254 if (spbuf) {
6255 while (spcount--)
6256 key_freesp(*spptr++, KEY_SADB_LOCKED);
6257 KFREE(spbuf);
6258 }
6259 if (savkabuf) {
6260 while (savkacount--)
6261 key_freesav(*savkaptr++, KEY_SADB_LOCKED);
6262 KFREE(savkabuf);
6263 }
6264 if (savexbuf) {
6265 while (savexcount--)
6266 key_freesav(*savexptr++, KEY_SADB_LOCKED);
6267 KFREE(savexbuf);
6268 }
2d21ac55 6269
fe8ab488 6270 if (stop_handler) {
39236c6e 6271 key_timehandler_running = 0;
fe8ab488
A		 6272 /* Turn on the ipsec bypass */
6273 ipsec_bypass = 1;
6274 } else {
39236c6e
A		 6275 /* do exchange to tick time !! */
6276 (void)timeout((void *)key_timehandler, (void *)0, hz);
6277 }
1c79356b 6278
39236c6e 6279 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 6280 return;
6281}
6282
6283/*
6284 * to initialize a seed for random()
6285 */
9bccf70c 6286static void
6d2010ae 6287key_srandom(void)
1c79356b 6288{
9bccf70c
A		 6289#ifdef __APPLE__
6290 /* Our PRNG is based on Yarrow and doesn't need to be seeded */
6291 random();
6292#else
1c79356b 6293 struct timeval tv;
39236c6e 6294
1c79356b 6295 microtime(&tv);
39236c6e 6296
1c79356b 6297 srandom(tv.tv_usec);
1c79356b 6298#endif
39236c6e 6299
1c79356b
A		 6300 return;
6301}
6302
b0d623f7 6303u_int32_t
6d2010ae 6304key_random(void)
9bccf70c 6305{
b0d623f7 6306 u_int32_t value;
39236c6e 6307
9bccf70c
A		 6308 key_randomfill(&value, sizeof(value));
6309 return value;
6310}
6311
6312void
6d2010ae 6313key_randomfill(
39236c6e
A		 6314 void *p,
6315 size_t l)
9bccf70c 6316{
9bccf70c 6317#ifdef __APPLE__
39236c6e 6318
9bccf70c
A		 6319 read_random(p, (u_int)l);
6320#else
2d21ac55 6321 size_t n;
b0d623f7 6322 u_int32_t v;
2d21ac55 6323 static int warn = 1;
39236c6e 6324
9bccf70c
A		 6325 n = 0;
6326 n = (size_t)read_random(p, (u_int)l);
6327 /* last resort */
6328 while (n < l) {
6329 v = random();
6330 bcopy(&v, (u_int8_t *)p + n,
39236c6e 6331 l - n < sizeof(v) ? l - n : sizeof(v));
9bccf70c 6332 n += sizeof(v);
39236c6e 6333
9bccf70c
A		 6334 if (warn) {
6335 printf("WARNING: pseudo-random number generator "
39236c6e 6336 "used for IPsec processing\n");
9bccf70c
A		 6337 warn = 0;
6338 }
6339 }
6340#endif
6341}
6342
1c79356b
A		 6343/*
6344 * map SADB_SATYPE_* to IPPROTO_*.
6345 * if satype == SADB_SATYPE then satype is mapped to ~0.
6346 * OUT:
6347 * 0: invalid satype.
6348 */
6349static u_int16_t
6d2010ae 6350key_satype2proto(
39236c6e 6351 u_int8_t satype)
1c79356b
A		 6352{
6353 switch (satype) {
39236c6e
A		 6354 case SADB_SATYPE_UNSPEC:
6355 return IPSEC_PROTO_ANY;
6356 case SADB_SATYPE_AH:
6357 return IPPROTO_AH;
6358 case SADB_SATYPE_ESP:
6359 return IPPROTO_ESP;
6360 case SADB_X_SATYPE_IPCOMP:
6361 return IPPROTO_IPCOMP;
39236c6e
A		 6362 default:
6363 return 0;
1c79356b
A		 6364 }
6365 /* NOTREACHED */
6366}
6367
6368/*
6369 * map IPPROTO_* to SADB_SATYPE_*
6370 * OUT:
6371 * 0: invalid protocol type.
6372 */
6373static u_int8_t
6d2010ae 6374key_proto2satype(
39236c6e 6375 u_int16_t proto)
1c79356b
A		 6376{
6377 switch (proto) {
39236c6e
A		 6378 case IPPROTO_AH:
6379 return SADB_SATYPE_AH;
6380 case IPPROTO_ESP:
6381 return SADB_SATYPE_ESP;
6382 case IPPROTO_IPCOMP:
6383 return SADB_X_SATYPE_IPCOMP;
39236c6e
A		 6384 default:
6385 return 0;
1c79356b
A		 6386 }
6387 /* NOTREACHED */
6388}
6389
fe8ab488 6390static ifnet_t
3e170ce0 6391key_get_ipsec_if_from_message (const struct sadb_msghdr *mhp, int message_type)
fe8ab488
A		 6392{
6393 struct sadb_x_ipsecif *ipsecifopts = NULL;
6394 ifnet_t ipsec_if = NULL;
6395
3e170ce0 6396 ipsecifopts = (struct sadb_x_ipsecif *)(void *)mhp->ext[message_type];
fe8ab488 6397 if (ipsecifopts != NULL) {
3e170ce0 6398 if (ipsecifopts->sadb_x_ipsecif_ipsec_if[0]) {
fe8ab488
A		 6399 ifnet_find_by_name(ipsecifopts->sadb_x_ipsecif_ipsec_if, &ipsec_if);
6400 }
6401 }
6402
6403 return ipsec_if;
6404}
6405
6406static u_int
3e170ce0 6407key_get_outgoing_ifindex_from_message (const struct sadb_msghdr *mhp, int message_type)
fe8ab488
A		 6408{
6409 struct sadb_x_ipsecif *ipsecifopts = NULL;
6410 ifnet_t outgoing_if = NULL;
6411
3e170ce0 6412 ipsecifopts = (struct sadb_x_ipsecif *)(void *)mhp->ext[message_type];
fe8ab488 6413 if (ipsecifopts != NULL) {
3e170ce0 6414 if (ipsecifopts->sadb_x_ipsecif_outgoing_if[0]) {
fe8ab488
A		 6415 ifnet_find_by_name(ipsecifopts->sadb_x_ipsecif_outgoing_if, &outgoing_if);
6416 }
6417 }
6418
6419 return outgoing_if ? outgoing_if->if_index : 0;
6420}
6421
1c79356b
A		 6422/* %%% PF_KEY */
6423/*
6424 * SADB_GETSPI processing is to receive
9bccf70c 6425 * <base, (SA2), src address, dst address, (SPI range)>
1c79356b
A		 6426 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
6427 * tree with the status of LARVAL, and send
6428 * <base, SA(*), address(SD)>
6429 * to the IKMPd.
6430 *
6431 * IN: mhp: pointer to the pointer to each header.
6432 * OUT: NULL if fail.
6433 * other if success, return pointer to the message to send.
6434 */
9bccf70c 6435static int
6d2010ae 6436key_getspi(
39236c6e
A		 6437 struct socket *so,
6438 struct mbuf *m,
6439 const struct sadb_msghdr *mhp)
1c79356b 6440{
1c79356b
A		 6441 struct sadb_address *src0, *dst0;
6442 struct secasindex saidx;
6443 struct secashead *newsah;
6444 struct secasvar *newsav;
fe8ab488 6445 ifnet_t ipsec_if = NULL;
1c79356b
A		 6446 u_int8_t proto;
6447 u_int32_t spi;
9bccf70c
A		 6448 u_int8_t mode;
6449 u_int32_t reqid;
6450 int error;
39236c6e 6451
2d21ac55
A		 6452 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
6453
1c79356b 6454 /* sanity check */
9bccf70c 6455 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 6456 panic("key_getspi: NULL pointer is passed.\n");
39236c6e 6457
9bccf70c
A		 6458 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6459 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
55e303ae 6460 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
9bccf70c
A		 6461 return key_senderror(so, m, EINVAL);
6462 }
6463 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6464 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
55e303ae 6465 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
9bccf70c
A		 6466 return key_senderror(so, m, EINVAL);
6467 }
6468 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
316670eb 6469 mode = ((struct sadb_x_sa2 *)
39236c6e 6470 (void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
316670eb 6471 reqid = ((struct sadb_x_sa2 *)
39236c6e 6472 (void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
9bccf70c
A		 6473 } else {
6474 mode = IPSEC_MODE_ANY;
6475 reqid = 0;
1c79356b 6476 }
39236c6e 6477
9bccf70c
A		 6478 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
6479 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
39236c6e 6480
3e170ce0 6481 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
fe8ab488 6482
1c79356b 6483 /* map satype to proto */
9bccf70c 6484 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 6485 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
9bccf70c
A		 6486 return key_senderror(so, m, EINVAL);
6487 }
39236c6e 6488
9bccf70c
A		 6489 /* make sure if port number is zero. */
6490 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
39236c6e
A		 6491 case AF_INET:
6492 if (((struct sockaddr *)(src0 + 1))->sa_len !=
6493 sizeof(struct sockaddr_in))
6494 return key_senderror(so, m, EINVAL);
6495 ((struct sockaddr_in *)(void *)(src0 + 1))->sin_port = 0;
6496 break;
6497 case AF_INET6:
6498 if (((struct sockaddr *)(src0 + 1))->sa_len !=
6499 sizeof(struct sockaddr_in6))
6500 return key_senderror(so, m, EINVAL);
6501 ((struct sockaddr_in6 *)(void *)(src0 + 1))->sin6_port = 0;
6502 break;
6503 default:
6504 ; /*???*/
9bccf70c
A		 6505 }
6506 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
39236c6e
A		 6507 case AF_INET:
6508 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
6509 sizeof(struct sockaddr_in))
6510 return key_senderror(so, m, EINVAL);
6511 ((struct sockaddr_in *)(void *)(dst0 + 1))->sin_port = 0;
6512 break;
6513 case AF_INET6:
6514 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
6515 sizeof(struct sockaddr_in6))
6516 return key_senderror(so, m, EINVAL);
6517 ((struct sockaddr_in6 *)(void *)(dst0 + 1))->sin6_port = 0;
6518 break;
6519 default:
6520 ; /*???*/
1c79356b 6521 }
39236c6e 6522
9bccf70c 6523 /* XXX boundary check against sa_len */
fe8ab488 6524 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 6525
2d21ac55 6526 lck_mtx_lock(sadb_mutex);
39236c6e 6527
1c79356b 6528 /* SPI allocation */
316670eb 6529 spi = key_do_getnewspi((struct sadb_spirange *)
39236c6e 6530 (void *)mhp->ext[SADB_EXT_SPIRANGE], &saidx);
2d21ac55
A		 6531 if (spi == 0) {
6532 lck_mtx_unlock(sadb_mutex);
9bccf70c 6533 return key_senderror(so, m, EINVAL);
2d21ac55 6534 }
39236c6e 6535
1c79356b
A		 6536 /* get a SA index */
6537 if ((newsah = key_getsah(&saidx)) == NULL) {
b0d623f7 6538 /* create a new SA index: key_addspi is always used for inbound spi */
3e170ce0 6539 if ((newsah = key_newsah(&saidx, ipsec_if, key_get_outgoing_ifindex_from_message(mhp, SADB_X_EXT_IPSECIF), IPSEC_DIR_INBOUND)) == NULL) {
2d21ac55 6540 lck_mtx_unlock(sadb_mutex);
55e303ae 6541 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
9bccf70c 6542 return key_senderror(so, m, ENOBUFS);
1c79356b
A		 6543 }
6544 }
39236c6e 6545
1c79356b 6546 /* get a new SA */
9bccf70c 6547 /* XXX rewrite */
fe8ab488 6548 newsav = key_newsav(m, mhp, newsah, &error, so);
9bccf70c 6549 if (newsav == NULL) {
1c79356b 6550 /* XXX don't free new SA index allocated in above. */
2d21ac55 6551 lck_mtx_unlock(sadb_mutex);
9bccf70c 6552 return key_senderror(so, m, error);
1c79356b 6553 }
39236c6e 6554
1c79356b 6555 /* set spi */
91447636 6556 key_setspi(newsav, htonl(spi));
39236c6e 6557
1c79356b
A		 6558#ifndef IPSEC_NONBLOCK_ACQUIRE
6559 /* delete the entry in acqtree */
9bccf70c 6560 if (mhp->msg->sadb_msg_seq != 0) {
1c79356b 6561 struct secacq *acq;
9bccf70c
A		 6562 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
6563 /* reset counter in order to deletion by timehandler. */
6564 struct timeval tv;
6565 microtime(&tv);
6566 acq->created = tv.tv_sec;
1c79356b
A		 6567 acq->count = 0;
6568 }
39236c6e 6569 }
1c79356b 6570#endif
39236c6e 6571
2d21ac55
A		 6572 lck_mtx_unlock(sadb_mutex);
6573
1c79356b 6574 {
39236c6e
A		 6575 struct mbuf *n, *nn;
6576 struct sadb_sa *m_sa;
6577 struct sadb_msg *newmsg;
6578 int off, len;
6579
6580 /* create new sadb_msg to reply. */
6581 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
9bccf70c 6582 PFKEY_ALIGN8(sizeof(struct sadb_sa));
39236c6e
A		 6583 if (len > MCLBYTES)
6584 return key_senderror(so, m, ENOBUFS);
6585
6586 MGETHDR(n, M_WAITOK, MT_DATA);
6587 if (n && len > MHLEN) {
6588 MCLGET(n, M_WAITOK);
6589 if ((n->m_flags & M_EXT) == 0) {
6590 m_freem(n);
6591 n = NULL;
6592 }
9bccf70c 6593 }
39236c6e
A		 6594 if (!n)
6595 return key_senderror(so, m, ENOBUFS);
6596
6597 n->m_len = len;
6598 n->m_next = NULL;
6599 off = 0;
6600
6601 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6602 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6603
6604 m_sa = (struct sadb_sa *)(void *)(mtod(n, caddr_t) + off);
6605 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
6606 m_sa->sadb_sa_exttype = SADB_EXT_SA;
6607 m_sa->sadb_sa_spi = htonl(spi);
6608 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
6609
9bccf70c 6610#if DIAGNOSTIC
39236c6e
A		 6611 if (off != len)
6612 panic("length inconsistency in key_getspi");
9bccf70c 6613#endif
39236c6e
A		 6614 {
6615 int mbufItems[] = {SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST};
6616 n->m_next = key_gather_mbuf(m, mhp, 0, sizeof(mbufItems)/sizeof(int), mbufItems);
6617 if (!n->m_next) {
6618 m_freem(n);
6619 return key_senderror(so, m, ENOBUFS);
6620 }
6621 }
6622
6623 if (n->m_len < sizeof(struct sadb_msg)) {
6624 n = m_pullup(n, sizeof(struct sadb_msg));
6625 if (n == NULL)
6626 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
6627 }
6628
6629 n->m_pkthdr.len = 0;
6630 for (nn = n; nn; nn = nn->m_next)
6631 n->m_pkthdr.len += nn->m_len;
6632
6633 newmsg = mtod(n, struct sadb_msg *);
6634 newmsg->sadb_msg_seq = newsav->seq;
6635 newmsg->sadb_msg_errno = 0;
6636 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
6637
6638 m_freem(m);
6639 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
1c79356b
A		 6640 }
6641}
6642
316670eb
A		 6643u_int32_t
6644key_getspi2(struct sockaddr *src,
6645 struct sockaddr *dst,
6646 u_int8_t proto,
6647 u_int8_t mode,
6648 u_int32_t reqid,
6649 struct sadb_spirange *spirange)
6650{
6651 u_int32_t spi;
6652 struct secasindex saidx;
39236c6e 6653
316670eb 6654 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
39236c6e 6655
316670eb 6656 /* XXX boundary check against sa_len */
fe8ab488 6657 KEY_SETSECASIDX(proto, mode, reqid, src, dst, 0, &saidx);
39236c6e 6658
316670eb
A		 6659 /* make sure if port number is zero. */
6660 switch (((struct sockaddr *)&saidx.src)->sa_family) {
6661 case AF_INET:
6662 if (((struct sockaddr *)&saidx.src)->sa_len != sizeof(struct sockaddr_in))
6663 return 0;
6664 ((struct sockaddr_in *)&saidx.src)->sin_port = 0;
6665 break;
6666 case AF_INET6:
6667 if (((struct sockaddr *)&saidx.src)->sa_len != sizeof(struct sockaddr_in6))
6668 return 0;
6669 ((struct sockaddr_in6 *)&saidx.src)->sin6_port = 0;
6670 break;
6671 default:
6672 ; /*???*/
6673 }
6674 switch (((struct sockaddr *)&saidx.dst)->sa_family) {
6675 case AF_INET:
6676 if (((struct sockaddr *)&saidx.dst)->sa_len != sizeof(struct sockaddr_in))
6677 return 0;
6678 ((struct sockaddr_in *)&saidx.dst)->sin_port = 0;
6679 break;
6680 case AF_INET6:
6681 if (((struct sockaddr *)&saidx.dst)->sa_len != sizeof(struct sockaddr_in6))
6682 return 0;
6683 ((struct sockaddr_in6 *)&saidx.dst)->sin6_port = 0;
6684 break;
6685 default:
6686 ; /*???*/
6687 }
39236c6e 6688
316670eb
A		 6689 lck_mtx_lock(sadb_mutex);
6690
6691 /* SPI allocation */
6692 spi = key_do_getnewspi(spirange, &saidx);
39236c6e 6693
316670eb 6694 lck_mtx_unlock(sadb_mutex);
39236c6e 6695
316670eb
A		 6696 return spi;
6697}
6698
1c79356b
A		 6699/*
6700 * allocating new SPI
316670eb 6701 * called by key_getspi() and key_getspi2().
1c79356b
A		 6702 * OUT:
6703 * 0: failure.
6704 * others: success.
6705 */
6706static u_int32_t
6d2010ae 6707key_do_getnewspi(
39236c6e
A		 6708 struct sadb_spirange *spirange,
6709 struct secasindex *saidx)
1c79356b
A		 6710{
6711 u_int32_t newspi;
2d21ac55 6712 u_int32_t keymin, keymax;
1c79356b 6713 int count = key_spi_trycnt;
39236c6e 6714
91447636 6715 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 6716
1c79356b
A		 6717 /* set spi range to allocate */
6718 if (spirange != NULL) {
2d21ac55
A		 6719 keymin = spirange->sadb_spirange_min;
6720 keymax = spirange->sadb_spirange_max;
1c79356b 6721 } else {
2d21ac55
A		 6722 keymin = key_spi_minval;
6723 keymax = key_spi_maxval;
1c79356b
A		 6724 }
6725 /* IPCOMP needs 2-byte SPI */
6726 if (saidx->proto == IPPROTO_IPCOMP) {
6727 u_int32_t t;
2d21ac55
A		 6728 if (keymin >= 0x10000)
6729 keymin = 0xffff;
6730 if (keymax >= 0x10000)
6731 keymax = 0xffff;
6732 if (keymin > keymax) {
6733 t = keymin; keymin = keymax; keymax = t;
1c79356b
A		 6734 }
6735 }
39236c6e 6736
2d21ac55
A		 6737 if (keymin == keymax) {
6738 if (key_checkspidup(saidx, keymin) != NULL) {
6739 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", keymin));
1c79356b
A		 6740 return 0;
6741 }
39236c6e 6742
1c79356b 6743 count--; /* taking one cost. */
2d21ac55 6744 newspi = keymin;
39236c6e 6745
1c79356b 6746 } else {
39236c6e 6747
b0d623f7 6748 u_int32_t range = keymax - keymin + 1; /* overflow value of zero means full range */
39236c6e 6749
1c79356b
A		 6750 /* init SPI */
6751 newspi = 0;
39236c6e 6752
1c79356b
A		 6753 /* when requesting to allocate spi ranged */
6754 while (count--) {
b0d623f7 6755 u_int32_t rand_val = key_random();
2d21ac55 6756
1c79356b 6757 /* generate pseudo-random SPI value ranged. */
2d21ac55 6758 newspi = (range == 0 ? rand_val : keymin + (rand_val % range));
39236c6e 6759
1c79356b
A		 6760 if (key_checkspidup(saidx, newspi) == NULL)
6761 break;
6762 }
39236c6e 6763
1c79356b 6764 if (count == 0 || newspi == 0) {
55e303ae 6765 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
1c79356b
A		 6766 return 0;
6767 }
6768 }
39236c6e 6769
1c79356b
A		 6770 /* statistics */
6771 keystat.getspi_count =
39236c6e
A		 6772 (keystat.getspi_count + key_spi_trycnt - count) / 2;
6773
1c79356b
A		 6774 return newspi;
6775}
6776
6777/*
6778 * SADB_UPDATE processing
6779 * receive
9bccf70c 6780 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
1c79356b
A		 6781 * key(AE), (identity(SD),) (sensitivity)>
6782 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
6783 * and send
9bccf70c 6784 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
1c79356b
A		 6785 * (identity(SD),) (sensitivity)>
6786 * to the ikmpd.
6787 *
9bccf70c 6788 * m will always be freed.
1c79356b 6789 */
9bccf70c 6790static int
6d2010ae 6791key_update(
39236c6e
A		 6792 struct socket *so,
6793 struct mbuf *m,
6794 const struct sadb_msghdr *mhp)
1c79356b 6795{
1c79356b
A		 6796 struct sadb_sa *sa0;
6797 struct sadb_address *src0, *dst0;
fe8ab488 6798 ifnet_t ipsec_if = NULL;
1c79356b
A		 6799 struct secasindex saidx;
6800 struct secashead *sah;
6801 struct secasvar *sav;
6802 u_int16_t proto;
9bccf70c
A		 6803 u_int8_t mode;
6804 u_int32_t reqid;
fe8ab488 6805 u_int16_t flags2;
9bccf70c 6806 int error;
39236c6e 6807
2d21ac55
A		 6808 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
6809
1c79356b 6810 /* sanity check */
9bccf70c 6811 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 6812 panic("key_update: NULL pointer is passed.\n");
39236c6e 6813
1c79356b 6814 /* map satype to proto */
9bccf70c 6815 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 6816 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
9bccf70c 6817 return key_senderror(so, m, EINVAL);
1c79356b 6818 }
39236c6e 6819
9bccf70c
A		 6820 if (mhp->ext[SADB_EXT_SA] == NULL ||
6821 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6822 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6823 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
6824 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
6825 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
6826 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
6827 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
6828 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
6829 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
6830 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
39236c6e
A		 6831 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
6832 return key_senderror(so, m, EINVAL);
6833 }
9bccf70c
A		 6834 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
6835 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6836 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
55e303ae 6837 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
9bccf70c
A		 6838 return key_senderror(so, m, EINVAL);
6839 }
6840 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
316670eb 6841 mode = ((struct sadb_x_sa2 *)
39236c6e 6842 (void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
316670eb 6843 reqid = ((struct sadb_x_sa2 *)
39236c6e 6844 (void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
fe8ab488 6845 flags2 = ((struct sadb_x_sa2 *)(void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_flags;
9bccf70c
A		 6846 } else {
6847 mode = IPSEC_MODE_ANY;
6848 reqid = 0;
fe8ab488 6849 flags2 = 0;
9bccf70c
A		 6850 }
6851 /* XXX boundary checking for other extensions */
39236c6e 6852
316670eb 6853 sa0 = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
9bccf70c
A		 6854 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
6855 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
3e170ce0 6856 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
39236c6e 6857
9bccf70c 6858 /* XXX boundary check against sa_len */
fe8ab488 6859 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 6860
2d21ac55 6861 lck_mtx_lock(sadb_mutex);
39236c6e 6862
1c79356b
A		 6863 /* get a SA header */
6864 if ((sah = key_getsah(&saidx)) == NULL) {
2d21ac55 6865 lck_mtx_unlock(sadb_mutex);
55e303ae 6866 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
9bccf70c 6867 return key_senderror(so, m, ENOENT);
1c79356b 6868 }
39236c6e 6869
1c79356b 6870 /* set spidx if there */
9bccf70c
A		 6871 /* XXX rewrite */
6872 error = key_setident(sah, m, mhp);
2d21ac55
A		 6873 if (error) {
6874 lck_mtx_unlock(sadb_mutex);
9bccf70c 6875 return key_senderror(so, m, error);
2d21ac55 6876 }
39236c6e 6877
1c79356b
A		 6878 /* find a SA with sequence number. */
6879#if IPSEC_DOSEQCHECK
9bccf70c 6880 if (mhp->msg->sadb_msg_seq != 0
39236c6e 6881 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
2d21ac55 6882 lck_mtx_unlock(sadb_mutex);
55e303ae 6883 ipseclog((LOG_DEBUG,
39236c6e
A		 6884 "key_update: no larval SA with sequence %u exists.\n",
6885 mhp->msg->sadb_msg_seq));
9bccf70c 6886 return key_senderror(so, m, ENOENT);
1c79356b
A		 6887 }
6888#else
6889 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
2d21ac55 6890 lck_mtx_unlock(sadb_mutex);
55e303ae 6891 ipseclog((LOG_DEBUG,
39236c6e
A		 6892 "key_update: no such a SA found (spi:%u)\n",
6893 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
9bccf70c 6894 return key_senderror(so, m, EINVAL);
1c79356b
A		 6895 }
6896#endif
39236c6e 6897
1c79356b
A		 6898 /* validity check */
6899 if (sav->sah->saidx.proto != proto) {
2d21ac55 6900 lck_mtx_unlock(sadb_mutex);
55e303ae 6901 ipseclog((LOG_DEBUG,
39236c6e
A		 6902 "key_update: protocol mismatched (DB=%u param=%u)\n",
6903 sav->sah->saidx.proto, proto));
9bccf70c 6904 return key_senderror(so, m, EINVAL);
1c79356b
A		 6905 }
6906#if IPSEC_DOSEQCHECK
6907 if (sav->spi != sa0->sadb_sa_spi) {
2d21ac55 6908 lck_mtx_unlock(sadb_mutex);
55e303ae 6909 ipseclog((LOG_DEBUG,
39236c6e
A		 6910 "key_update: SPI mismatched (DB:%u param:%u)\n",
6911 (u_int32_t)ntohl(sav->spi),
6912 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
9bccf70c 6913 return key_senderror(so, m, EINVAL);
1c79356b
A		 6914 }
6915#endif
9bccf70c 6916 if (sav->pid != mhp->msg->sadb_msg_pid) {
2d21ac55 6917 lck_mtx_unlock(sadb_mutex);
55e303ae 6918 ipseclog((LOG_DEBUG,
39236c6e
A		 6919 "key_update: pid mismatched (DB:%u param:%u)\n",
6920 sav->pid, mhp->msg->sadb_msg_pid));
9bccf70c 6921 return key_senderror(so, m, EINVAL);
1c79356b 6922 }
39236c6e 6923
1c79356b 6924 /* copy sav values */
9bccf70c
A		 6925 error = key_setsaval(sav, m, mhp);
6926 if (error) {
2d21ac55
A		 6927 key_freesav(sav, KEY_SADB_LOCKED);
6928 lck_mtx_unlock(sadb_mutex);
9bccf70c 6929 return key_senderror(so, m, error);
1c79356b 6930 }
fe8ab488
A		 6931
6932 sav->flags2 = flags2;
6933 if (flags2 & SADB_X_EXT_SA2_DELETE_ON_DETACH) {
6934 sav->so = so;
6935 }
6936
2d21ac55
A		 6937 /*
6938 * Verify if SADB_X_EXT_NATT_MULTIPLEUSERS flag is set that
6939 * this SA is for transport mode - otherwise clear it.
6940 */
6941 if ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0 &&
6942 (sav->sah->saidx.mode != IPSEC_MODE_TRANSPORT ||
39236c6e 6943 sav->sah->saidx.src.ss_family != AF_INET))
2d21ac55 6944 sav->flags &= ~SADB_X_EXT_NATT_MULTIPLEUSERS;
39236c6e 6945
1c79356b 6946 /* check SA values to be mature. */
91447636 6947 if ((error = key_mature(sav)) != 0) {
2d21ac55
A		 6948 key_freesav(sav, KEY_SADB_LOCKED);
6949 lck_mtx_unlock(sadb_mutex);
91447636 6950 return key_senderror(so, m, error);
1c79356b 6951 }
2d21ac55
A		 6952
6953 lck_mtx_unlock(sadb_mutex);
6954
1c79356b 6955 {
39236c6e
A		 6956 struct mbuf *n;
6957
6958 /* set msg buf from mhp */
6959 n = key_getmsgbuf_x1(m, mhp);
6960 if (n == NULL) {
6961 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
6962 return key_senderror(so, m, ENOBUFS);
6963 }
6964
6965 m_freem(m);
6966 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1c79356b
A		 6967 }
6968}
6969
3e170ce0
A		 6970static int
6971key_migrate(struct socket *so,
6972 struct mbuf *m,
6973 const struct sadb_msghdr *mhp)
6974{
6975 struct sadb_sa *sa0 = NULL;
6976 struct sadb_address *src0 = NULL;
6977 struct sadb_address *dst0 = NULL;
6978 struct sadb_address *src1 = NULL;
6979 struct sadb_address *dst1 = NULL;
6980 ifnet_t ipsec_if0 = NULL;
6981 ifnet_t ipsec_if1 = NULL;
6982 struct secasindex saidx0;
6983 struct secasindex saidx1;
6984 struct secashead *sah = NULL;
6985 struct secashead *newsah = NULL;
6986 struct secasvar *sav = NULL;
6987 u_int16_t proto;
6988
6989 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
6990
6991 /* sanity check */
6992 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6993 panic("key_migrate: NULL pointer is passed.\n");
6994
6995 /* map satype to proto */
6996 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6997 ipseclog((LOG_DEBUG, "key_migrate: invalid satype is passed.\n"));
6998 return key_senderror(so, m, EINVAL);
6999 }
7000
7001 if (mhp->ext[SADB_EXT_SA] == NULL ||
7002 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
7003 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
7004 mhp->ext[SADB_EXT_MIGRATE_ADDRESS_SRC] == NULL ||
7005 mhp->ext[SADB_EXT_MIGRATE_ADDRESS_DST] == NULL) {
7006 ipseclog((LOG_DEBUG, "key_migrate: invalid message is passed.\n"));
7007 return key_senderror(so, m, EINVAL);
7008 }
7009
7010 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
7011 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
7012 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
7013 mhp->extlen[SADB_EXT_MIGRATE_ADDRESS_SRC] < sizeof(struct sadb_address) ||
7014 mhp->extlen[SADB_EXT_MIGRATE_ADDRESS_DST] < sizeof(struct sadb_address)) {
7015 ipseclog((LOG_DEBUG, "key_migrate: invalid message is passed.\n"));
7016 return key_senderror(so, m, EINVAL);
7017 }
7018
7019 lck_mtx_lock(sadb_mutex);
7020
7021 sa0 = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
7022 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
7023 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
7024 src1 = (struct sadb_address *)(mhp->ext[SADB_EXT_MIGRATE_ADDRESS_SRC]);
7025 dst1 = (struct sadb_address *)(mhp->ext[SADB_EXT_MIGRATE_ADDRESS_DST]);
7026 ipsec_if0 = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
7027 ipsec_if1 = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_MIGRATE_IPSECIF);
7028
7029 /* Find existing SAH and SAV */
7030 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, ipsec_if0 ? ipsec_if0->if_index : 0, &saidx0);
7031
7032 LIST_FOREACH(sah, &sahtree, chain) {
7033 if (sah->state != SADB_SASTATE_MATURE)
7034 continue;
7035 if (key_cmpsaidx(&sah->saidx, &saidx0, CMP_HEAD) == 0)
7036 continue;
7037
7038 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
7039 if (sav && sav->state == SADB_SASTATE_MATURE)
7040 break;
7041 }
7042 if (sah == NULL) {
7043 lck_mtx_unlock(sadb_mutex);
7044 ipseclog((LOG_DEBUG, "key_migrate: no mature SAH found.\n"));
7045 return key_senderror(so, m, ENOENT);
7046 }
7047
7048 if (sav == NULL) {
7049 lck_mtx_unlock(sadb_mutex);
7050 ipseclog((LOG_DEBUG, "key_migrate: no SA found.\n"));
7051 return key_senderror(so, m, ENOENT);
7052 }
7053
7054 /* Find or create new SAH */
7055 KEY_SETSECASIDX(proto, sah->saidx.mode, sah->saidx.reqid, src1 + 1, dst1 + 1, ipsec_if1 ? ipsec_if1->if_index : 0, &saidx1);
7056
7057 if ((newsah = key_getsah(&saidx1)) == NULL) {
7058 if ((newsah = key_newsah(&saidx1, ipsec_if1, key_get_outgoing_ifindex_from_message(mhp, SADB_X_EXT_MIGRATE_IPSECIF), sah->dir)) == NULL) {
7059 lck_mtx_unlock(sadb_mutex);
7060 ipseclog((LOG_DEBUG, "key_migrate: No more memory.\n"));
7061 return key_senderror(so, m, ENOBUFS);
7062 }
7063 }
7064
7065 /* Migrate SAV in to new SAH */
7066 if (key_migratesav(sav, newsah) != 0) {
7067 lck_mtx_unlock(sadb_mutex);
7068 ipseclog((LOG_DEBUG, "key_migrate: Failed to migrate SA to new SAH.\n"));
7069 return key_senderror(so, m, EINVAL);
7070 }
7071
7072 /* Reset NAT values */
7073 sav->flags = sa0->sadb_sa_flags;
7074 sav->remote_ike_port = ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_port;
7075 sav->natt_interval = ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_interval;
7076 sav->natt_offload_interval = ((const struct sadb_sa_2*)(sa0))->sadb_sa_natt_offload_interval;
7077 sav->natt_last_activity = natt_now;
39037602 7078
3e170ce0
A		 7079 /*
7080 * Verify if SADB_X_EXT_NATT_MULTIPLEUSERS flag is set that
7081 * SADB_X_EXT_NATT is set and SADB_X_EXT_NATT_KEEPALIVE is not
7082 * set (we're not behind nat) - otherwise clear it.
7083 */
7084 if ((sav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0)
7085 if ((sav->flags & SADB_X_EXT_NATT) == 0 ||
7086 (sav->flags & SADB_X_EXT_NATT_KEEPALIVE) != 0)
7087 sav->flags &= ~SADB_X_EXT_NATT_MULTIPLEUSERS;
7088
7089 lck_mtx_unlock(sadb_mutex);
7090 {
7091 struct mbuf *n;
7092 struct sadb_msg *newmsg;
7093 int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_SA,
7094 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST, SADB_X_EXT_IPSECIF,
7095 SADB_EXT_MIGRATE_ADDRESS_SRC, SADB_EXT_MIGRATE_ADDRESS_DST, SADB_X_EXT_MIGRATE_IPSECIF};
7096
7097 /* create new sadb_msg to reply. */
7098 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
7099 if (!n)
7100 return key_senderror(so, m, ENOBUFS);
7101
7102 if (n->m_len < sizeof(struct sadb_msg)) {
7103 n = m_pullup(n, sizeof(struct sadb_msg));
7104 if (n == NULL)
7105 return key_senderror(so, m, ENOBUFS);
7106 }
7107 newmsg = mtod(n, struct sadb_msg *);
7108 newmsg->sadb_msg_errno = 0;
7109 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
7110
7111 m_freem(m);
7112 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
7113 }
7114}
7115
1c79356b
A		 7116/*
7117 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
7118 * only called by key_update().
7119 * OUT:
7120 * NULL : not found
7121 * others : found, pointer to a SA.
7122 */
7123#if IPSEC_DOSEQCHECK
7124static struct secasvar *
6d2010ae 7125key_getsavbyseq(
39236c6e
A		 7126 struct secashead *sah,
7127 u_int32_t seq)
1c79356b
A		 7128{
7129 struct secasvar *sav;
7130 u_int state;
39236c6e 7131
91447636 7132 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 7133
1c79356b 7134 state = SADB_SASTATE_LARVAL;
39236c6e 7135
1c79356b
A		 7136 /* search SAD with sequence number ? */
7137 LIST_FOREACH(sav, &sah->savtree[state], chain) {
39236c6e 7138
1c79356b 7139 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
39236c6e 7140
1c79356b
A		 7141 if (sav->seq == seq) {
7142 sav->refcnt++;
7143 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
39236c6e
A		 7144 printf("DP key_getsavbyseq cause "
7145 "refcnt++:%d SA:0x%llx\n", sav->refcnt,
7146 (uint64_t)VM_KERNEL_ADDRPERM(sav)));
1c79356b
A		 7147 return sav;
7148 }
7149 }
39236c6e 7150
1c79356b
A		 7151 return NULL;
7152}
7153#endif
7154
7155/*
7156 * SADB_ADD processing
7157 * add a entry to SA database, when received
9bccf70c 7158 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
1c79356b
A		 7159 * key(AE), (identity(SD),) (sensitivity)>
7160 * from the ikmpd,
7161 * and send
9bccf70c 7162 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
1c79356b
A		 7163 * (identity(SD),) (sensitivity)>
7164 * to the ikmpd.
7165 *
7166 * IGNORE identity and sensitivity messages.
7167 *
9bccf70c 7168 * m will always be freed.
1c79356b 7169 */
9bccf70c 7170static int
6d2010ae 7171key_add(
39236c6e
A		 7172 struct socket *so,
7173 struct mbuf *m,
7174 const struct sadb_msghdr *mhp)
9bccf70c
A		 7175{
7176 struct sadb_sa *sa0;
1c79356b 7177 struct sadb_address *src0, *dst0;
fe8ab488 7178 ifnet_t ipsec_if = NULL;
1c79356b
A		 7179 struct secasindex saidx;
7180 struct secashead *newsah;
7181 struct secasvar *newsav;
7182 u_int16_t proto;
9bccf70c
A		 7183 u_int8_t mode;
7184 u_int32_t reqid;
7185 int error;
39236c6e 7186
2d21ac55
A		 7187 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
7188
1c79356b 7189 /* sanity check */
9bccf70c 7190 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 7191 panic("key_add: NULL pointer is passed.\n");
39236c6e 7192
1c79356b 7193 /* map satype to proto */
9bccf70c 7194 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 7195 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
ecc0ceb4 7196 bzero_keys(mhp);
9bccf70c 7197 return key_senderror(so, m, EINVAL);
1c79356b 7198 }
39236c6e 7199
9bccf70c
A		 7200 if (mhp->ext[SADB_EXT_SA] == NULL ||
7201 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
7202 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
7203 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
7204 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
7205 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
7206 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
7207 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
7208 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
7209 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
7210 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
39236c6e 7211 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
ecc0ceb4 7212 bzero_keys(mhp);
39236c6e
A		 7213 return key_senderror(so, m, EINVAL);
7214 }
9bccf70c
A		 7215 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
7216 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
7217 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
7218 /* XXX need more */
55e303ae 7219 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
ecc0ceb4 7220 bzero_keys(mhp);
9bccf70c
A		 7221 return key_senderror(so, m, EINVAL);
7222 }
7223 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
316670eb 7224 mode = ((struct sadb_x_sa2 *)
39236c6e 7225 (void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
316670eb 7226 reqid = ((struct sadb_x_sa2 *)
39236c6e 7227 (void *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
9bccf70c
A		 7228 } else {
7229 mode = IPSEC_MODE_ANY;
7230 reqid = 0;
1c79356b 7231 }
39236c6e 7232
316670eb 7233 sa0 = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
9bccf70c
A		 7234 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
7235 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
3e170ce0 7236 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
39236c6e 7237
9bccf70c 7238 /* XXX boundary check against sa_len */
fe8ab488 7239 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 7240
2d21ac55 7241 lck_mtx_lock(sadb_mutex);
39236c6e 7242
1c79356b
A		 7243 /* get a SA header */
7244 if ((newsah = key_getsah(&saidx)) == NULL) {
b0d623f7 7245 /* create a new SA header: key_addspi is always used for outbound spi */
3e170ce0 7246 if ((newsah = key_newsah(&saidx, ipsec_if, key_get_outgoing_ifindex_from_message(mhp, SADB_X_EXT_IPSECIF), IPSEC_DIR_OUTBOUND)) == NULL) {
2d21ac55 7247 lck_mtx_unlock(sadb_mutex);
55e303ae 7248 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
ecc0ceb4 7249 bzero_keys(mhp);
9bccf70c 7250 return key_senderror(so, m, ENOBUFS);
1c79356b
A		 7251 }
7252 }
39236c6e 7253
1c79356b 7254 /* set spidx if there */
9bccf70c
A		 7255 /* XXX rewrite */
7256 error = key_setident(newsah, m, mhp);
7257 if (error) {
2d21ac55 7258 lck_mtx_unlock(sadb_mutex);
ecc0ceb4 7259 bzero_keys(mhp);
9bccf70c
A		 7260 return key_senderror(so, m, error);
7261 }
39236c6e 7262
1c79356b 7263 /* create new SA entry. */
2d21ac55 7264 /* We can create new SA only if SPI is different. */
1c79356b 7265 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
2d21ac55 7266 lck_mtx_unlock(sadb_mutex);
55e303ae 7267 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
ecc0ceb4 7268 bzero_keys(mhp);
9bccf70c
A		 7269 return key_senderror(so, m, EEXIST);
7270 }
fe8ab488 7271 newsav = key_newsav(m, mhp, newsah, &error, so);
9bccf70c 7272 if (newsav == NULL) {
2d21ac55 7273 lck_mtx_unlock(sadb_mutex);
ecc0ceb4 7274 bzero_keys(mhp);
9bccf70c 7275 return key_senderror(so, m, error);
1c79356b 7276 }
39236c6e 7277
2d21ac55
A		 7278 /*
7279 * Verify if SADB_X_EXT_NATT_MULTIPLEUSERS flag is set that
7280 * this SA is for transport mode - otherwise clear it.
7281 */
7282 if ((newsav->flags & SADB_X_EXT_NATT_MULTIPLEUSERS) != 0 &&
7283 (newsah->saidx.mode != IPSEC_MODE_TRANSPORT ||
39236c6e 7284 newsah->saidx.dst.ss_family != AF_INET))
2d21ac55 7285 newsav->flags &= ~SADB_X_EXT_NATT_MULTIPLEUSERS;
39236c6e 7286
1c79356b 7287 /* check SA values to be mature. */
9bccf70c 7288 if ((error = key_mature(newsav)) != 0) {
2d21ac55
A		 7289 key_freesav(newsav, KEY_SADB_LOCKED);
7290 lck_mtx_unlock(sadb_mutex);
ecc0ceb4 7291 bzero_keys(mhp);
9bccf70c 7292 return key_senderror(so, m, error);
1c79356b 7293 }
39236c6e 7294
2d21ac55
A		 7295 lck_mtx_unlock(sadb_mutex);
7296
1c79356b
A		 7297 /*
7298 * don't call key_freesav() here, as we would like to keep the SA
7299 * in the database on success.
7300 */
39236c6e 7301
1c79356b 7302 {
39236c6e
A		 7303 struct mbuf *n;
7304
7305 /* set msg buf from mhp */
7306 n = key_getmsgbuf_x1(m, mhp);
7307 if (n == NULL) {
7308 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
ecc0ceb4 7309 bzero_keys(mhp);
39236c6e
A		 7310 return key_senderror(so, m, ENOBUFS);
7311 }
7312
ecc0ceb4
A		 7313 // mh.ext points to the mbuf content.
7314 // Zero out Encryption and Integrity keys if present.
7315 bzero_keys(mhp);
39236c6e
A		 7316 m_freem(m);
7317 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
7318 }
1c79356b
A		 7319}
7320
9bccf70c 7321/* m is retained */
1c79356b 7322static int
6d2010ae 7323key_setident(
39236c6e
A		 7324 struct secashead *sah,
7325 struct mbuf *m,
7326 const struct sadb_msghdr *mhp)
1c79356b 7327{
9bccf70c 7328 const struct sadb_ident *idsrc, *iddst;
1c79356b 7329 int idsrclen, iddstlen;
39236c6e 7330
91447636 7331 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 7332
1c79356b 7333 /* sanity check */
9bccf70c 7334 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 7335 panic("key_setident: NULL pointer is passed.\n");
39236c6e 7336
1c79356b 7337 /* don't make buffer if not there */
9bccf70c
A		 7338 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
7339 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
1c79356b
A		 7340 sah->idents = NULL;
7341 sah->identd = NULL;
7342 return 0;
7343 }
7344
9bccf70c
A		 7345 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
7346 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
55e303ae 7347 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
9bccf70c 7348 return EINVAL;
1c79356b 7349 }
39236c6e 7350
316670eb 7351 idsrc = (const struct sadb_ident *)
39236c6e 7352 (void *)mhp->ext[SADB_EXT_IDENTITY_SRC];
316670eb 7353 iddst = (const struct sadb_ident *)
39236c6e 7354 (void *)mhp->ext[SADB_EXT_IDENTITY_DST];
9bccf70c
A		 7355 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
7356 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
39236c6e 7357
1c79356b
A		 7358 /* validity check */
7359 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
55e303ae 7360 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
9bccf70c 7361 return EINVAL;
1c79356b 7362 }
39236c6e 7363
1c79356b 7364 switch (idsrc->sadb_ident_type) {
39236c6e
A		 7365 case SADB_IDENTTYPE_PREFIX:
7366 case SADB_IDENTTYPE_FQDN:
7367 case SADB_IDENTTYPE_USERFQDN:
7368 default:
7369 /* XXX do nothing */
7370 sah->idents = NULL;
7371 sah->identd = NULL;
7372 return 0;
1c79356b 7373 }
39236c6e 7374
1c79356b 7375 /* make structure */
2d21ac55 7376 KMALLOC_NOWAIT(sah->idents, struct sadb_ident *, idsrclen);
1c79356b 7377 if (sah->idents == NULL) {
2d21ac55
A		 7378 lck_mtx_unlock(sadb_mutex);
7379 KMALLOC_WAIT(sah->idents, struct sadb_ident *, idsrclen);
7380 lck_mtx_lock(sadb_mutex);
7381 if (sah->idents == NULL) {
7382 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
7383 return ENOBUFS;
7384 }
1c79356b 7385 }
2d21ac55 7386 KMALLOC_NOWAIT(sah->identd, struct sadb_ident *, iddstlen);
1c79356b 7387 if (sah->identd == NULL) {
2d21ac55
A		 7388 lck_mtx_unlock(sadb_mutex);
7389 KMALLOC_WAIT(sah->identd, struct sadb_ident *, iddstlen);
7390 lck_mtx_lock(sadb_mutex);
7391 if (sah->identd == NULL) {
7392 KFREE(sah->idents);
7393 sah->idents = NULL;
7394 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
7395 return ENOBUFS;
7396 }
1c79356b
A		 7397 }
7398 bcopy(idsrc, sah->idents, idsrclen);
7399 bcopy(iddst, sah->identd, iddstlen);
39236c6e 7400
1c79356b
A		 7401 return 0;
7402}
7403
9bccf70c
A		 7404/*
7405 * m will not be freed on return.
39236c6e 7406 * it is caller's responsibility to free the result.
9bccf70c
A		 7407 */
7408static struct mbuf *
6d2010ae 7409key_getmsgbuf_x1(
39236c6e
A		 7410 struct mbuf *m,
7411 const struct sadb_msghdr *mhp)
1c79356b 7412{
9bccf70c
A		 7413 struct mbuf *n;
7414 int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_SA,
39236c6e
A		 7415 SADB_X_EXT_SA2, SADB_EXT_ADDRESS_SRC,
7416 SADB_EXT_ADDRESS_DST, SADB_EXT_LIFETIME_HARD,
7417 SADB_EXT_LIFETIME_SOFT, SADB_EXT_IDENTITY_SRC,
7418 SADB_EXT_IDENTITY_DST};
7419
1c79356b 7420 /* sanity check */
9bccf70c 7421 if (m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 7422 panic("key_getmsgbuf_x1: NULL pointer is passed.\n");
39236c6e 7423
1c79356b 7424 /* create new sadb_msg to reply. */
9bccf70c
A		 7425 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
7426 if (!n)
1c79356b 7427 return NULL;
39236c6e 7428
9bccf70c
A		 7429 if (n->m_len < sizeof(struct sadb_msg)) {
7430 n = m_pullup(n, sizeof(struct sadb_msg));
7431 if (n == NULL)
7432 return NULL;
7433 }
7434 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
7435 mtod(n, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 7436 PFKEY_UNIT64(n->m_pkthdr.len);
7437
9bccf70c 7438 return n;
1c79356b
A		 7439}
7440
91447636 7441static int key_delete_all(struct socket *, struct mbuf *,
39236c6e 7442 const struct sadb_msghdr *, u_int16_t);
9bccf70c 7443
1c79356b
A		 7444/*
7445 * SADB_DELETE processing
7446 * receive
7447 * <base, SA(*), address(SD)>
7448 * from the ikmpd, and set SADB_SASTATE_DEAD,
7449 * and send,
7450 * <base, SA(*), address(SD)>
7451 * to the ikmpd.
7452 *
9bccf70c 7453 * m will always be freed.
1c79356b 7454 */
9bccf70c 7455static int
6d2010ae 7456key_delete(
39236c6e
A		 7457 struct socket *so,
7458 struct mbuf *m,
7459 const struct sadb_msghdr *mhp)
1c79356b 7460{
1c79356b
A		 7461 struct sadb_sa *sa0;
7462 struct sadb_address *src0, *dst0;
fe8ab488 7463 ifnet_t ipsec_if = NULL;
1c79356b
A		 7464 struct secasindex saidx;
7465 struct secashead *sah;
9bccf70c 7466 struct secasvar *sav = NULL;
1c79356b 7467 u_int16_t proto;
39236c6e 7468
2d21ac55
A		 7469 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
7470
1c79356b 7471 /* sanity check */
9bccf70c 7472 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 7473 panic("key_delete: NULL pointer is passed.\n");
39236c6e 7474
1c79356b 7475 /* map satype to proto */
9bccf70c 7476 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 7477 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
9bccf70c 7478 return key_senderror(so, m, EINVAL);
1c79356b 7479 }
39236c6e 7480
9bccf70c
A		 7481 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
7482 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
55e303ae 7483 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
9bccf70c 7484 return key_senderror(so, m, EINVAL);
1c79356b 7485 }
39236c6e 7486
9bccf70c
A		 7487 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
7488 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
55e303ae 7489 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
9bccf70c
A		 7490 return key_senderror(so, m, EINVAL);
7491 }
39236c6e 7492
2d21ac55
A		 7493 lck_mtx_lock(sadb_mutex);
7494
9bccf70c
A		 7495 if (mhp->ext[SADB_EXT_SA] == NULL) {
7496 /*
7497 * Caller wants us to delete all non-LARVAL SAs
7498 * that match the src/dst. This is used during
7499 * IKE INITIAL-CONTACT.
7500 */
55e303ae 7501 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
2d21ac55 7502 /* key_delete_all will unlock sadb_mutex */
39236c6e 7503 return key_delete_all(so, m, mhp, proto);
9bccf70c 7504 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
2d21ac55 7505 lck_mtx_unlock(sadb_mutex);
55e303ae 7506 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
9bccf70c 7507 return key_senderror(so, m, EINVAL);
1c79356b 7508 }
39236c6e 7509
316670eb 7510 sa0 = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
9bccf70c
A		 7511 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
7512 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
3e170ce0 7513 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
39236c6e 7514
9bccf70c 7515 /* XXX boundary check against sa_len */
fe8ab488 7516 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 7517
9bccf70c
A		 7518 /* get a SA header */
7519 LIST_FOREACH(sah, &sahtree, chain) {
7520 if (sah->state == SADB_SASTATE_DEAD)
7521 continue;
55e303ae 7522 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
9bccf70c 7523 continue;
39236c6e 7524
9bccf70c
A		 7525 /* get a SA with SPI. */
7526 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
7527 if (sav)
7528 break;
7529 }
7530 if (sah == NULL) {
2d21ac55 7531 lck_mtx_unlock(sadb_mutex);
55e303ae 7532 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
9bccf70c 7533 return key_senderror(so, m, ENOENT);
1c79356b 7534 }
39236c6e 7535
1c79356b 7536 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
2d21ac55
A		 7537 key_freesav(sav, KEY_SADB_LOCKED);
7538
7539 lck_mtx_unlock(sadb_mutex);
1c79356b 7540 sav = NULL;
39236c6e 7541
1c79356b 7542 {
39236c6e
A		 7543 struct mbuf *n;
7544 struct sadb_msg *newmsg;
7545 int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_SA,
7546 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST};
7547
7548 /* create new sadb_msg to reply. */
7549 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
7550 if (!n)
9bccf70c 7551 return key_senderror(so, m, ENOBUFS);
39236c6e
A		 7552
7553 if (n->m_len < sizeof(struct sadb_msg)) {
7554 n = m_pullup(n, sizeof(struct sadb_msg));
7555 if (n == NULL)
7556 return key_senderror(so, m, ENOBUFS);
7557 }
7558 newmsg = mtod(n, struct sadb_msg *);
7559 newmsg->sadb_msg_errno = 0;
7560 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
7561
7562 m_freem(m);
7563 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
9bccf70c
A		 7564 }
7565}
7566
7567/*
7568 * delete all SAs for src/dst. Called from key_delete().
7569 */
7570static int
6d2010ae 7571key_delete_all(
39236c6e
A		 7572 struct socket *so,
7573 struct mbuf *m,
7574 const struct sadb_msghdr *mhp,
7575 u_int16_t proto)
9bccf70c
A		 7576{
7577 struct sadb_address *src0, *dst0;
fe8ab488 7578 ifnet_t ipsec_if = NULL;
9bccf70c
A		 7579 struct secasindex saidx;
7580 struct secashead *sah;
7581 struct secasvar *sav, *nextsav;
7582 u_int stateidx, state;
39236c6e 7583
91447636 7584 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 7585
9bccf70c
A		 7586 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
7587 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
3e170ce0 7588 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
39236c6e 7589
9bccf70c 7590 /* XXX boundary check against sa_len */
fe8ab488 7591 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 7592
9bccf70c
A		 7593 LIST_FOREACH(sah, &sahtree, chain) {
7594 if (sah->state == SADB_SASTATE_DEAD)
7595 continue;
55e303ae 7596 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
9bccf70c 7597 continue;
39236c6e 7598
9bccf70c
A		 7599 /* Delete all non-LARVAL SAs. */
7600 for (stateidx = 0;
7601 stateidx < _ARRAYLEN(saorder_state_alive);
7602 stateidx++) {
7603 state = saorder_state_alive[stateidx];
7604 if (state == SADB_SASTATE_LARVAL)
7605 continue;
7606 for (sav = LIST_FIRST(&sah->savtree[state]);
7607 sav != NULL; sav = nextsav) {
7608 nextsav = LIST_NEXT(sav, chain);
7609 /* sanity check */
7610 if (sav->state != state) {
55e303ae 7611 ipseclog((LOG_DEBUG, "key_delete_all: "
39236c6e
A		 7612 "invalid sav->state "
7613 "(queue: %d SA: %d)\n",
7614 state, sav->state));
9bccf70c
A		 7615 continue;
7616 }
7617
7618 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
2d21ac55 7619 key_freesav(sav, KEY_SADB_LOCKED);
9bccf70c
A		 7620 }
7621 }
1c79356b 7622 }
2d21ac55
A		 7623 lck_mtx_unlock(sadb_mutex);
7624
9bccf70c 7625 {
39236c6e
A		 7626 struct mbuf *n;
7627 struct sadb_msg *newmsg;
7628 int mbufItems[] = {SADB_EXT_RESERVED, SADB_EXT_ADDRESS_SRC,
7629 SADB_EXT_ADDRESS_DST};
7630
7631 /* create new sadb_msg to reply. */
7632 n = key_gather_mbuf(m, mhp, 1, sizeof(mbufItems)/sizeof(int), mbufItems);
7633 if (!n)
9bccf70c 7634 return key_senderror(so, m, ENOBUFS);
39236c6e
A		 7635
7636 if (n->m_len < sizeof(struct sadb_msg)) {
7637 n = m_pullup(n, sizeof(struct sadb_msg));
7638 if (n == NULL)
7639 return key_senderror(so, m, ENOBUFS);
7640 }
7641 newmsg = mtod(n, struct sadb_msg *);
7642 newmsg->sadb_msg_errno = 0;
7643 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
7644
7645 m_freem(m);
7646 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1c79356b
A		 7647 }
7648}
7649
7650/*
7651 * SADB_GET processing
7652 * receive
7653 * <base, SA(*), address(SD)>
7654 * from the ikmpd, and get a SP and a SA to respond,
7655 * and send,
7656 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
7657 * (identity(SD),) (sensitivity)>
7658 * to the ikmpd.
7659 *
9bccf70c 7660 * m will always be freed.
1c79356b 7661 */
9bccf70c 7662static int
6d2010ae 7663key_get(
39236c6e
A		 7664 struct socket *so,
7665 struct mbuf *m,
7666 const struct sadb_msghdr *mhp)
1c79356b 7667{
1c79356b
A		 7668 struct sadb_sa *sa0;
7669 struct sadb_address *src0, *dst0;
fe8ab488 7670 ifnet_t ipsec_if = NULL;
1c79356b
A		 7671 struct secasindex saidx;
7672 struct secashead *sah;
9bccf70c 7673 struct secasvar *sav = NULL;
1c79356b 7674 u_int16_t proto;
39236c6e 7675
2d21ac55
A		 7676 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
7677
1c79356b 7678 /* sanity check */
9bccf70c 7679 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 7680 panic("key_get: NULL pointer is passed.\n");
39236c6e 7681
1c79356b 7682 /* map satype to proto */
9bccf70c 7683 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 7684 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
9bccf70c 7685 return key_senderror(so, m, EINVAL);
1c79356b 7686 }
39236c6e 7687
9bccf70c
A		 7688 if (mhp->ext[SADB_EXT_SA] == NULL ||
7689 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
7690 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
55e303ae 7691 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
9bccf70c 7692 return key_senderror(so, m, EINVAL);
1c79356b 7693 }
9bccf70c
A		 7694 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
7695 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
7696 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
55e303ae 7697 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
9bccf70c 7698 return key_senderror(so, m, EINVAL);
1c79356b 7699 }
39236c6e 7700
316670eb 7701 sa0 = (struct sadb_sa *)(void *)mhp->ext[SADB_EXT_SA];
9bccf70c
A		 7702 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
7703 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
3e170ce0 7704 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
39236c6e 7705
9bccf70c 7706 /* XXX boundary check against sa_len */
fe8ab488 7707 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 7708
2d21ac55
A		 7709 lck_mtx_lock(sadb_mutex);
7710
9bccf70c
A		 7711 /* get a SA header */
7712 LIST_FOREACH(sah, &sahtree, chain) {
7713 if (sah->state == SADB_SASTATE_DEAD)
7714 continue;
55e303ae 7715 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
9bccf70c 7716 continue;
39236c6e 7717
9bccf70c
A		 7718 /* get a SA with SPI. */
7719 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
7720 if (sav)
7721 break;
7722 }
7723 if (sah == NULL) {
2d21ac55 7724 lck_mtx_unlock(sadb_mutex);
55e303ae 7725 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
9bccf70c 7726 return key_senderror(so, m, ENOENT);
1c79356b 7727 }
39236c6e 7728
1c79356b 7729 {
39236c6e
A		 7730 struct mbuf *n;
7731 u_int8_t satype;
7732
7733 /* map proto to satype */
7734 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
7735 lck_mtx_unlock(sadb_mutex);
7736 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
7737 return key_senderror(so, m, EINVAL);
7738 }
2d21ac55 7739 lck_mtx_unlock(sadb_mutex);
39236c6e
A		 7740
7741 /* create new sadb_msg to reply. */
7742 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
7743 mhp->msg->sadb_msg_pid);
7744
7745
7746
7747 if (!n)
7748 return key_senderror(so, m, ENOBUFS);
7749
7750 m_freem(m);
7751 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
9bccf70c
A		 7752 }
7753}
7754
b0d623f7
A		 7755/*
7756 * get SA stats by spi.
7757 * OUT: -1 : not found
7758 * 0 : found, arg pointer to a SA stats is updated.
7759 */
7760static int
7761key_getsastatbyspi_one (u_int32_t spi,
39236c6e 7762 struct sastat *stat)
b0d623f7
A		 7763{
7764 struct secashead *sah;
7765 struct secasvar *sav = NULL;
39236c6e 7766
b0d623f7 7767 if ((void *)stat == NULL) {
39236c6e 7768 return -1;
b0d623f7 7769 }
39236c6e 7770
b0d623f7
A		 7771 lck_mtx_lock(sadb_mutex);
7772
7773 /* get a SA header */
7774 LIST_FOREACH(sah, &sahtree, chain) {
7775 if (sah->state == SADB_SASTATE_DEAD)
7776 continue;
39236c6e 7777
b0d623f7
A		 7778 /* get a SA with SPI. */
7779 sav = key_getsavbyspi(sah, spi);
7780 if (sav) {
39236c6e 7781 stat->spi = sav->spi;
b0d623f7
A		 7782 stat->created = sav->created;
7783 if (sav->lft_c) {
39236c6e 7784 bcopy(sav->lft_c,&stat->lft_c, sizeof(stat->lft_c));
b0d623f7 7785 } else {
39236c6e 7786 bzero(&stat->lft_c, sizeof(stat->lft_c));
b0d623f7
A		 7787 }
7788 lck_mtx_unlock(sadb_mutex);
7789 return 0;
7790 }
7791 }
39236c6e 7792
b0d623f7 7793 lck_mtx_unlock(sadb_mutex);
39236c6e 7794
b0d623f7
A		 7795 return -1;
7796}
7797
7798/*
7799 * get SA stats collection by indices.
7800 * OUT: -1 : not found
7801 * 0 : found, arg pointers to a SA stats and 'maximum stats' are updated.
7802 */
7803static int
7804key_getsastatbyspi (struct sastat *stat_arg,
39236c6e
A		 7805 u_int32_t max_stat_arg,
7806 struct sastat *stat_res,
7807 u_int32_t *max_stat_res)
b0d623f7 7808{
39236c6e
A		 7809 int cur, found = 0;
7810
b0d623f7 7811 if (stat_arg == NULL ||
39236c6e 7812 stat_res == NULL ||
b0d623f7 7813 max_stat_res == NULL) {
39236c6e 7814 return -1;
b0d623f7 7815 }
39236c6e 7816
b0d623f7 7817 for (cur = 0; cur < max_stat_arg; cur++) {
39236c6e
A		 7818 if (key_getsastatbyspi_one(stat_arg[cur].spi,
7819 &stat_res[found]) == 0) {
7820 found++;
b0d623f7
A		 7821 }
7822 }
7823 *max_stat_res = found;
39236c6e 7824
b0d623f7 7825 if (found) {
39236c6e 7826 return 0;
b0d623f7
A		 7827 }
7828 return -1;
7829}
7830
9bccf70c
A		 7831/* XXX make it sysctl-configurable? */
7832static void
6d2010ae 7833key_getcomb_setlifetime(
39236c6e 7834 struct sadb_comb *comb)
9bccf70c 7835{
39236c6e 7836
9bccf70c
A		 7837 comb->sadb_comb_soft_allocations = 1;
7838 comb->sadb_comb_hard_allocations = 1;
7839 comb->sadb_comb_soft_bytes = 0;
7840 comb->sadb_comb_hard_bytes = 0;
7841 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
7842 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
7843 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
7844 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
7845}
7846
7847#if IPSEC_ESP
7848/*
7849 * XXX reorder combinations by preference
7850 * XXX no idea if the user wants ESP authentication or not
7851 */
7852static struct mbuf *
6d2010ae 7853key_getcomb_esp(void)
9bccf70c
A		 7854{
7855 struct sadb_comb *comb;
7856 const struct esp_algorithm *algo;
7857 struct mbuf *result = NULL, *m, *n;
7858 int encmin;
7859 int i, off, o;
7860 int totlen;
7861 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
39236c6e 7862
9bccf70c
A		 7863 m = NULL;
7864 for (i = 1; i <= SADB_EALG_MAX; i++) {
7865 algo = esp_algorithm_lookup(i);
7866 if (!algo)
7867 continue;
39236c6e 7868
9bccf70c
A		 7869 if (algo->keymax < ipsec_esp_keymin)
7870 continue;
7871 if (algo->keymin < ipsec_esp_keymin)
7872 encmin = ipsec_esp_keymin;
7873 else
7874 encmin = algo->keymin;
39236c6e 7875
9bccf70c
A		 7876 if (ipsec_esp_auth)
7877 m = key_getcomb_ah();
7878 else {
7879#if DIAGNOSTIC
7880 if (l > MLEN)
7881 panic("assumption failed in key_getcomb_esp");
7882#endif
316670eb 7883 MGET(m, M_WAITOK, MT_DATA);
9bccf70c
A		 7884 if (m) {
7885 M_ALIGN(m, l);
7886 m->m_len = l;
7887 m->m_next = NULL;
7888 bzero(mtod(m, caddr_t), m->m_len);
7889 }
7890 }
7891 if (!m)
7892 goto fail;
39236c6e 7893
9bccf70c
A		 7894 totlen = 0;
7895 for (n = m; n; n = n->m_next)
7896 totlen += n->m_len;
7897#if DIAGNOSTIC
7898 if (totlen % l)
7899 panic("assumption failed in key_getcomb_esp");
7900#endif
39236c6e 7901
9bccf70c
A		 7902 for (off = 0; off < totlen; off += l) {
7903 n = m_pulldown(m, off, l, &o);
7904 if (!n) {
7905 /* m is already freed */
7906 goto fail;
7907 }
316670eb 7908 comb = (struct sadb_comb *)
39236c6e 7909 (void *)(mtod(n, caddr_t) + o);
9bccf70c
A		 7910 bzero(comb, sizeof(*comb));
7911 key_getcomb_setlifetime(comb);
7912 comb->sadb_comb_encrypt = i;
7913 comb->sadb_comb_encrypt_minbits = encmin;
7914 comb->sadb_comb_encrypt_maxbits = algo->keymax;
7915 }
39236c6e 7916
9bccf70c
A		 7917 if (!result)
7918 result = m;
7919 else
7920 m_cat(result, m);
7921 }
39236c6e 7922
9bccf70c 7923 return result;
39236c6e
A		 7924
7925fail:
9bccf70c
A		 7926 if (result)
7927 m_freem(result);
7928 return NULL;
7929}
1c79356b 7930#endif
9bccf70c
A		 7931
7932/*
7933 * XXX reorder combinations by preference
7934 */
7935static struct mbuf *
6d2010ae 7936key_getcomb_ah(void)
9bccf70c
A		 7937{
7938 struct sadb_comb *comb;
7939 const struct ah_algorithm *algo;
7940 struct mbuf *m;
2d21ac55 7941 int keymin;
9bccf70c
A		 7942 int i;
7943 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
39236c6e 7944
9bccf70c
A		 7945 m = NULL;
7946 for (i = 1; i <= SADB_AALG_MAX; i++) {
7947#if 1
7948 /* we prefer HMAC algorithms, not old algorithms */
7949 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
7950 continue;
7951#endif
7952 algo = ah_algorithm_lookup(i);
7953 if (!algo)
7954 continue;
39236c6e 7955
9bccf70c
A		 7956 if (algo->keymax < ipsec_ah_keymin)
7957 continue;
7958 if (algo->keymin < ipsec_ah_keymin)
2d21ac55 7959 keymin = ipsec_ah_keymin;
9bccf70c 7960 else
2d21ac55 7961 keymin = algo->keymin;
39236c6e 7962
9bccf70c
A		 7963 if (!m) {
7964#if DIAGNOSTIC
7965 if (l > MLEN)
7966 panic("assumption failed in key_getcomb_ah");
7967#endif
316670eb 7968 MGET(m, M_WAITOK, MT_DATA);
9bccf70c
A		 7969 if (m) {
7970 M_ALIGN(m, l);
7971 m->m_len = l;
7972 m->m_next = NULL;
7973 }
7974 } else
3e170ce0 7975 M_PREPEND(m, l, M_WAITOK, 1);
9bccf70c
A		 7976 if (!m)
7977 return NULL;
39236c6e 7978
9bccf70c
A		 7979 comb = mtod(m, struct sadb_comb *);
7980 bzero(comb, sizeof(*comb));
7981 key_getcomb_setlifetime(comb);
7982 comb->sadb_comb_auth = i;
2d21ac55 7983 comb->sadb_comb_auth_minbits = keymin;
9bccf70c
A		 7984 comb->sadb_comb_auth_maxbits = algo->keymax;
7985 }
39236c6e 7986
9bccf70c
A		 7987 return m;
7988}
7989
7990/*
7991 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
7992 * XXX reorder combinations by preference
7993 */
7994static struct mbuf *
6d2010ae 7995key_getcomb_ipcomp(void)
9bccf70c
A		 7996{
7997 struct sadb_comb *comb;
7998 const struct ipcomp_algorithm *algo;
7999 struct mbuf *m;
8000 int i;
8001 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
39236c6e 8002
9bccf70c
A		 8003 m = NULL;
8004 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
8005 algo = ipcomp_algorithm_lookup(i);
8006 if (!algo)
8007 continue;
39236c6e 8008
9bccf70c
A		 8009 if (!m) {
8010#if DIAGNOSTIC
8011 if (l > MLEN)
8012 panic("assumption failed in key_getcomb_ipcomp");
8013#endif
316670eb 8014 MGET(m, M_WAITOK, MT_DATA);
9bccf70c
A		 8015 if (m) {
8016 M_ALIGN(m, l);
8017 m->m_len = l;
8018 m->m_next = NULL;
8019 }
8020 } else
3e170ce0 8021 M_PREPEND(m, l, M_WAITOK, 1);
9bccf70c
A		 8022 if (!m)
8023 return NULL;
39236c6e 8024
9bccf70c
A		 8025 comb = mtod(m, struct sadb_comb *);
8026 bzero(comb, sizeof(*comb));
8027 key_getcomb_setlifetime(comb);
8028 comb->sadb_comb_encrypt = i;
8029 /* what should we set into sadb_comb_*_{min,max}bits? */
8030 }
39236c6e 8031
9bccf70c
A		 8032 return m;
8033}
8034
8035/*
8036 * XXX no way to pass mode (transport/tunnel) to userland
8037 * XXX replay checking?
8038 * XXX sysctl interface to ipsec_{ah,esp}_keymin
8039 */
8040static struct mbuf *
6d2010ae 8041key_getprop(
39236c6e 8042 const struct secasindex *saidx)
9bccf70c
A		 8043{
8044 struct sadb_prop *prop;
8045 struct mbuf *m, *n;
8046 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
8047 int totlen;
39236c6e 8048
9bccf70c
A		 8049 switch (saidx->proto) {
8050#if IPSEC_ESP
39236c6e
A		 8051 case IPPROTO_ESP:
8052 m = key_getcomb_esp();
8053 break;
9bccf70c 8054#endif
39236c6e
A		 8055 case IPPROTO_AH:
8056 m = key_getcomb_ah();
8057 break;
8058 case IPPROTO_IPCOMP:
8059 m = key_getcomb_ipcomp();
8060 break;
8061 default:
8062 return NULL;
1c79356b 8063 }
39236c6e 8064
9bccf70c
A		 8065 if (!m)
8066 return NULL;
3e170ce0 8067 M_PREPEND(m, l, M_WAITOK, 1);
9bccf70c
A		 8068 if (!m)
8069 return NULL;
39236c6e 8070
9bccf70c
A		 8071 totlen = 0;
8072 for (n = m; n; n = n->m_next)
8073 totlen += n->m_len;
39236c6e 8074
9bccf70c
A		 8075 prop = mtod(m, struct sadb_prop *);
8076 bzero(prop, sizeof(*prop));
8077 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
8078 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
8079 prop->sadb_prop_replay = 32; /* XXX */
39236c6e 8080
9bccf70c 8081 return m;
1c79356b
A		 8082}
8083
8084/*
8085 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
8086 * send
9bccf70c 8087 * <base, SA, address(SD), (address(P)), x_policy,
1c79356b
A		 8088 * (identity(SD),) (sensitivity,) proposal>
8089 * to KMD, and expect to receive
91447636 8090 * <base> with SADB_ACQUIRE if error occurred,
1c79356b
A		 8091 * or
8092 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
8093 * from KMD by PF_KEY.
8094 *
9bccf70c
A		 8095 * XXX x_policy is outside of RFC2367 (KAME extension).
8096 * XXX sensitivity is not supported.
8097 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
8098 * see comment for key_getcomb_ipcomp().
1c79356b
A		 8099 *
8100 * OUT:
8101 * 0 : succeed
8102 * others: error number
8103 */
8104static int
6d2010ae 8105key_acquire(
39236c6e
A		 8106 struct secasindex *saidx,
8107 struct secpolicy *sp)
1c79356b 8108{
9bccf70c 8109 struct mbuf *result = NULL, *m;
1c79356b
A		 8110#ifndef IPSEC_NONBLOCK_ACQUIRE
8111 struct secacq *newacq;
8112#endif
1c79356b 8113 u_int8_t satype;
9bccf70c
A		 8114 int error = -1;
8115 u_int32_t seq;
39236c6e 8116
2d21ac55
A		 8117 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
8118
1c79356b 8119 /* sanity check */
9bccf70c 8120 if (saidx == NULL)
1c79356b
A		 8121 panic("key_acquire: NULL pointer is passed.\n");
8122 if ((satype = key_proto2satype(saidx->proto)) == 0)
8123 panic("key_acquire: invalid proto is passed.\n");
39236c6e 8124
1c79356b
A		 8125#ifndef IPSEC_NONBLOCK_ACQUIRE
8126 /*
8127 * We never do anything about acquirng SA. There is anather
8128 * solution that kernel blocks to send SADB_ACQUIRE message until
8129 * getting something message from IKEd. In later case, to be
8130 * managed with ACQUIRING list.
8131 */
8132 /* get a entry to check whether sending message or not. */
2d21ac55 8133 lck_mtx_lock(sadb_mutex);
1c79356b
A		 8134 if ((newacq = key_getacq(saidx)) != NULL) {
8135 if (key_blockacq_count < newacq->count) {
8136 /* reset counter and do send message. */
8137 newacq->count = 0;
8138 } else {
8139 /* increment counter and do nothing. */
8140 newacq->count++;
2d21ac55 8141 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 8142 return 0;
8143 }
8144 } else {
8145 /* make new entry for blocking to send SADB_ACQUIRE. */
2d21ac55
A		 8146 if ((newacq = key_newacq(saidx)) == NULL) {
8147 lck_mtx_unlock(sadb_mutex);
1c79356b 8148 return ENOBUFS;
2d21ac55 8149 }
39236c6e 8150
1c79356b
A		 8151 /* add to acqtree */
8152 LIST_INSERT_HEAD(&acqtree, newacq, chain);
39236c6e 8153 key_start_timehandler();
1c79356b 8154 }
9bccf70c 8155 seq = newacq->seq;
2d21ac55 8156 lck_mtx_unlock(sadb_mutex);
39236c6e 8157
1c79356b 8158#else
9bccf70c 8159 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
1c79356b 8160#endif
9bccf70c
A		 8161 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
8162 if (!m) {
8163 error = ENOBUFS;
8164 goto fail;
8165 }
8166 result = m;
39236c6e 8167
1c79356b 8168 /* set sadb_address for saidx's. */
9bccf70c 8169 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
39236c6e 8170 (struct sockaddr *)&saidx->src, FULLMASK, IPSEC_ULPROTO_ANY);
9bccf70c
A		 8171 if (!m) {
8172 error = ENOBUFS;
8173 goto fail;
8174 }
8175 m_cat(result, m);
39236c6e 8176
9bccf70c 8177 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
39236c6e 8178 (struct sockaddr *)&saidx->dst, FULLMASK, IPSEC_ULPROTO_ANY);
9bccf70c
A		 8179 if (!m) {
8180 error = ENOBUFS;
8181 goto fail;
8182 }
8183 m_cat(result, m);
39236c6e 8184
9bccf70c 8185 /* XXX proxy address (optional) */
39236c6e 8186
9bccf70c
A		 8187 /* set sadb_x_policy */
8188 if (sp) {
8189 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
8190 if (!m) {
8191 error = ENOBUFS;
8192 goto fail;
8193 }
8194 m_cat(result, m);
8195 }
316670eb 8196
9bccf70c
A		 8197 /* XXX identity (optional) */
8198#if 0
1c79356b
A		 8199 if (idexttype && fqdn) {
8200 /* create identity extension (FQDN) */
8201 struct sadb_ident *id;
8202 int fqdnlen;
39236c6e 8203
1c79356b
A		 8204 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
8205 id = (struct sadb_ident *)p;
8206 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
8207 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
8208 id->sadb_ident_exttype = idexttype;
8209 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
8210 bcopy(fqdn, id + 1, fqdnlen);
8211 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
8212 }
39236c6e 8213
1c79356b
A		 8214 if (idexttype) {
8215 /* create identity extension (USERFQDN) */
8216 struct sadb_ident *id;
8217 int userfqdnlen;
39236c6e 8218
1c79356b
A		 8219 if (userfqdn) {
8220 /* +1 for terminating-NUL */
8221 userfqdnlen = strlen(userfqdn) + 1;
8222 } else
8223 userfqdnlen = 0;
8224 id = (struct sadb_ident *)p;
8225 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
8226 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
8227 id->sadb_ident_exttype = idexttype;
8228 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
8229 /* XXX is it correct? */
8230 if (curproc && curproc->p_cred)
8231 id->sadb_ident_id = curproc->p_cred->p_ruid;
8232 if (userfqdn && userfqdnlen)
8233 bcopy(userfqdn, id + 1, userfqdnlen);
8234 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
8235 }
8236#endif
39236c6e 8237
9bccf70c 8238 /* XXX sensitivity (optional) */
39236c6e 8239
9bccf70c
A		 8240 /* create proposal/combination extension */
8241 m = key_getprop(saidx);
8242#if 0
8243 /*
8244 * spec conformant: always attach proposal/combination extension,
8245 * the problem is that we have no way to attach it for ipcomp,
8246 * due to the way sadb_comb is declared in RFC2367.
8247 */
8248 if (!m) {
8249 error = ENOBUFS;
8250 goto fail;
8251 }
8252 m_cat(result, m);
8253#else
8254 /*
8255 * outside of spec; make proposal/combination extension optional.
8256 */
8257 if (m)
8258 m_cat(result, m);
1c79356b 8259#endif
39236c6e 8260
9bccf70c
A		 8261 if ((result->m_flags & M_PKTHDR) == 0) {
8262 error = EINVAL;
8263 goto fail;
8264 }
39236c6e 8265
9bccf70c
A		 8266 if (result->m_len < sizeof(struct sadb_msg)) {
8267 result = m_pullup(result, sizeof(struct sadb_msg));
8268 if (result == NULL) {
8269 error = ENOBUFS;
8270 goto fail;
8271 }
8272 }
39236c6e 8273
9bccf70c
A		 8274 result->m_pkthdr.len = 0;
8275 for (m = result; m; m = m->m_next)
8276 result->m_pkthdr.len += m->m_len;
39236c6e 8277
9bccf70c 8278 mtod(result, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 8279 PFKEY_UNIT64(result->m_pkthdr.len);
8280
9bccf70c 8281 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
39236c6e
A		 8282
8283fail:
9bccf70c
A		 8284 if (result)
8285 m_freem(result);
8286 return error;
1c79356b
A		 8287}
8288
8289#ifndef IPSEC_NONBLOCK_ACQUIRE
8290static struct secacq *
6d2010ae 8291key_newacq(
39236c6e 8292 struct secasindex *saidx)
1c79356b
A		 8293{
8294 struct secacq *newacq;
9bccf70c 8295 struct timeval tv;
39236c6e 8296
1c79356b 8297 /* get new entry */
2d21ac55 8298 KMALLOC_NOWAIT(newacq, struct secacq *, sizeof(struct secacq));
1c79356b 8299 if (newacq == NULL) {
2d21ac55
A		 8300 lck_mtx_unlock(sadb_mutex);
8301 KMALLOC_WAIT(newacq, struct secacq *, sizeof(struct secacq));
8302 lck_mtx_lock(sadb_mutex);
39236c6e 8303 if (newacq == NULL) {
2d21ac55
A		 8304 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
8305 return NULL;
8306 }
1c79356b
A		 8307 }
8308 bzero(newacq, sizeof(*newacq));
39236c6e 8309
1c79356b
A		 8310 /* copy secindex */
8311 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
8312 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
9bccf70c
A		 8313 microtime(&tv);
8314 newacq->created = tv.tv_sec;
1c79356b 8315 newacq->count = 0;
39236c6e 8316
1c79356b
A		 8317 return newacq;
8318}
8319
8320static struct secacq *
6d2010ae 8321key_getacq(
39236c6e 8322 struct secasindex *saidx)
1c79356b
A		 8323{
8324 struct secacq *acq;
39236c6e 8325
91447636 8326 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 8327
1c79356b 8328 LIST_FOREACH(acq, &acqtree, chain) {
55e303ae 8329 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
1c79356b
A		 8330 return acq;
8331 }
39236c6e 8332
1c79356b
A		 8333 return NULL;
8334}
8335
8336static struct secacq *
6d2010ae 8337key_getacqbyseq(
39236c6e 8338 u_int32_t seq)
1c79356b
A		 8339{
8340 struct secacq *acq;
39236c6e 8341
91447636 8342 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 8343
1c79356b
A		 8344 LIST_FOREACH(acq, &acqtree, chain) {
8345 if (acq->seq == seq)
8346 return acq;
8347 }
39236c6e 8348
1c79356b
A		 8349 return NULL;
8350}
8351#endif
8352
8353static struct secspacq *
6d2010ae 8354key_newspacq(
39236c6e 8355 struct secpolicyindex *spidx)
1c79356b
A		 8356{
8357 struct secspacq *acq;
9bccf70c 8358 struct timeval tv;
39236c6e 8359
1c79356b 8360 /* get new entry */
2d21ac55 8361 KMALLOC_NOWAIT(acq, struct secspacq *, sizeof(struct secspacq));
1c79356b 8362 if (acq == NULL) {
2d21ac55
A		 8363 lck_mtx_unlock(sadb_mutex);
8364 KMALLOC_WAIT(acq, struct secspacq *, sizeof(struct secspacq));
8365 lck_mtx_lock(sadb_mutex);
8366 if (acq == NULL) {
8367 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
8368 return NULL;
8369 }
1c79356b
A		 8370 }
8371 bzero(acq, sizeof(*acq));
39236c6e 8372
1c79356b
A		 8373 /* copy secindex */
8374 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
9bccf70c
A		 8375 microtime(&tv);
8376 acq->created = tv.tv_sec;
1c79356b 8377 acq->count = 0;
39236c6e 8378
1c79356b
A		 8379 return acq;
8380}
8381
8382static struct secspacq *
6d2010ae 8383key_getspacq(
39236c6e 8384 struct secpolicyindex *spidx)
1c79356b
A		 8385{
8386 struct secspacq *acq;
39236c6e 8387
91447636 8388 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 8389
1c79356b
A		 8390 LIST_FOREACH(acq, &spacqtree, chain) {
8391 if (key_cmpspidx_exactly(spidx, &acq->spidx))
8392 return acq;
8393 }
39236c6e 8394
1c79356b
A		 8395 return NULL;
8396}
8397
8398/*
8399 * SADB_ACQUIRE processing,
8400 * in first situation, is receiving
8401 * <base>
8402 * from the ikmpd, and clear sequence of its secasvar entry.
8403 *
8404 * In second situation, is receiving
8405 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
8406 * from a user land process, and return
8407 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
8408 * to the socket.
8409 *
9bccf70c 8410 * m will always be freed.
1c79356b 8411 */
9bccf70c 8412static int
6d2010ae 8413key_acquire2(
39236c6e
A		 8414 struct socket *so,
8415 struct mbuf *m,
8416 const struct sadb_msghdr *mhp)
1c79356b 8417{
9bccf70c 8418 const struct sadb_address *src0, *dst0;
fe8ab488 8419 ifnet_t ipsec_if = NULL;
1c79356b
A		 8420 struct secasindex saidx;
8421 struct secashead *sah;
8422 u_int16_t proto;
9bccf70c 8423 int error;
39236c6e
A		 8424
8425
1c79356b 8426 /* sanity check */
9bccf70c 8427 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 8428 panic("key_acquire2: NULL pointer is passed.\n");
39236c6e 8429
1c79356b
A		 8430 /*
8431 * Error message from KMd.
91447636 8432 * We assume that if error was occurred in IKEd, the length of PFKEY
1c79356b 8433 * message is equal to the size of sadb_msg structure.
91447636 8434 * We do not raise error even if error occurred in this function.
1c79356b 8435 */
39236c6e
A		 8436 lck_mtx_lock(sadb_mutex);
8437
9bccf70c 8438 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
1c79356b
A		 8439#ifndef IPSEC_NONBLOCK_ACQUIRE
8440 struct secacq *acq;
9bccf70c 8441 struct timeval tv;
39236c6e 8442
1c79356b 8443 /* check sequence number */
9bccf70c 8444 if (mhp->msg->sadb_msg_seq == 0) {
2d21ac55 8445 lck_mtx_unlock(sadb_mutex);
55e303ae 8446 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
9bccf70c
A		 8447 m_freem(m);
8448 return 0;
1c79356b 8449 }
39236c6e 8450
9bccf70c
A		 8451 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
8452 /*
8453 * the specified larval SA is already gone, or we got
8454 * a bogus sequence number. we can silently ignore it.
8455 */
2d21ac55 8456 lck_mtx_unlock(sadb_mutex);
9bccf70c
A		 8457 m_freem(m);
8458 return 0;
1c79356b 8459 }
39236c6e 8460
1c79356b 8461 /* reset acq counter in order to deletion by timehander. */
9bccf70c
A		 8462 microtime(&tv);
8463 acq->created = tv.tv_sec;
1c79356b
A		 8464 acq->count = 0;
8465#endif
2d21ac55 8466 lck_mtx_unlock(sadb_mutex);
9bccf70c
A		 8467 m_freem(m);
8468 return 0;
1c79356b 8469 }
39236c6e 8470
1c79356b
A		 8471 /*
8472 * This message is from user land.
8473 */
39236c6e 8474
1c79356b 8475 /* map satype to proto */
9bccf70c 8476 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
2d21ac55 8477 lck_mtx_unlock(sadb_mutex);
55e303ae 8478 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
9bccf70c 8479 return key_senderror(so, m, EINVAL);
1c79356b 8480 }
39236c6e 8481
9bccf70c
A		 8482 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
8483 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
8484 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
1c79356b 8485 /* error */
2d21ac55 8486 lck_mtx_unlock(sadb_mutex);
55e303ae 8487 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
9bccf70c 8488 return key_senderror(so, m, EINVAL);
1c79356b 8489 }
9bccf70c
A		 8490 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
8491 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
8492 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
8493 /* error */
2d21ac55 8494 lck_mtx_unlock(sadb_mutex);
55e303ae 8495 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
9bccf70c
A		 8496 return key_senderror(so, m, EINVAL);
8497 }
39236c6e 8498
b0d623f7
A		 8499 src0 = (const struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
8500 dst0 = (const struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
3e170ce0 8501 ipsec_if = key_get_ipsec_if_from_message(mhp, SADB_X_EXT_IPSECIF);
39236c6e 8502
9bccf70c 8503 /* XXX boundary check against sa_len */
b0d623f7 8504 /* cast warnings */
fe8ab488 8505 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, ipsec_if ? ipsec_if->if_index : 0, &saidx);
39236c6e 8506
1c79356b 8507 /* get a SA index */
9bccf70c
A		 8508 LIST_FOREACH(sah, &sahtree, chain) {
8509 if (sah->state == SADB_SASTATE_DEAD)
8510 continue;
2d21ac55 8511 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE | CMP_REQID))
9bccf70c
A		 8512 break;
8513 }
8514 if (sah != NULL) {
2d21ac55 8515 lck_mtx_unlock(sadb_mutex);
55e303ae 8516 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
9bccf70c 8517 return key_senderror(so, m, EEXIST);
1c79356b 8518 }
2d21ac55 8519 lck_mtx_unlock(sadb_mutex);
9bccf70c
A		 8520 error = key_acquire(&saidx, NULL);
8521 if (error != 0) {
55e303ae 8522 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
39236c6e 8523 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
9bccf70c 8524 return key_senderror(so, m, error);
1c79356b 8525 }
39236c6e 8526
9bccf70c 8527 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
1c79356b
A		 8528}
8529
8530/*
8531 * SADB_REGISTER processing.
2d21ac55 8532 * If SATYPE_UNSPEC has been passed as satype, only return sadb_supported.
1c79356b
A		 8533 * receive
8534 * <base>
8535 * from the ikmpd, and register a socket to send PF_KEY messages,
8536 * and send
8537 * <base, supported>
8538 * to KMD by PF_KEY.
8539 * If socket is detached, must free from regnode.
9bccf70c
A		 8540 *
8541 * m will always be freed.
1c79356b 8542 */
9bccf70c 8543static int
6d2010ae 8544key_register(
39236c6e
A		 8545 struct socket *so,
8546 struct mbuf *m,
8547 const struct sadb_msghdr *mhp)
1c79356b 8548{
1c79356b 8549 struct secreg *reg, *newreg = 0;
2d21ac55 8550
1c79356b 8551 /* sanity check */
9bccf70c 8552 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 8553 panic("key_register: NULL pointer is passed.\n");
39236c6e 8554
1c79356b 8555 /* check for invalid register message */
9bccf70c
A		 8556 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0]))
8557 return key_senderror(so, m, EINVAL);
39236c6e 8558
2d21ac55 8559 /* When SATYPE_UNSPEC is specified, only return sadb_supported. */
9bccf70c 8560 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
1c79356b 8561 goto setmsg;
39236c6e 8562
2d21ac55
A		 8563 /* create regnode */
8564 KMALLOC_WAIT(newreg, struct secreg *, sizeof(*newreg));
39236c6e
A		 8565 if (newreg == NULL) {
8566 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
8567 return key_senderror(so, m, ENOBUFS);
8568 }
8569 bzero((caddr_t)newreg, sizeof(*newreg));
8570
2d21ac55 8571 lck_mtx_lock(sadb_mutex);
1c79356b 8572 /* check whether existing or not */
9bccf70c 8573 LIST_FOREACH(reg, &regtree[mhp->msg->sadb_msg_satype], chain) {
1c79356b 8574 if (reg->so == so) {
2d21ac55 8575 lck_mtx_unlock(sadb_mutex);
55e303ae 8576 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
2d21ac55 8577 KFREE(newreg);
9bccf70c 8578 return key_senderror(so, m, EEXIST);
1c79356b
A		 8579 }
8580 }
39236c6e 8581
91447636 8582 socket_lock(so, 1);
1c79356b
A		 8583 newreg->so = so;
8584 ((struct keycb *)sotorawcb(so))->kp_registered++;
91447636 8585 socket_unlock(so, 1);
39236c6e 8586
1c79356b 8587 /* add regnode to regtree. */
9bccf70c 8588 LIST_INSERT_HEAD(&regtree[mhp->msg->sadb_msg_satype], newreg, chain);
2d21ac55 8589 lck_mtx_unlock(sadb_mutex);
39236c6e 8590setmsg:
9bccf70c 8591 {
39236c6e
A		 8592 struct mbuf *n;
8593 struct sadb_msg *newmsg;
8594 struct sadb_supported *sup;
8595 u_int len, alen, elen;
8596 int off;
8597 int i;
8598 struct sadb_alg *alg;
8599
8600 /* create new sadb_msg to reply. */
8601 alen = 0;
8602 for (i = 1; i <= SADB_AALG_MAX; i++) {
8603 if (ah_algorithm_lookup(i))
8604 alen += sizeof(struct sadb_alg);
8605 }
8606 if (alen)
8607 alen += sizeof(struct sadb_supported);
8608 elen = 0;
9bccf70c 8609#if IPSEC_ESP
39236c6e
A		 8610 for (i = 1; i <= SADB_EALG_MAX; i++) {
8611 if (esp_algorithm_lookup(i))
8612 elen += sizeof(struct sadb_alg);
8613 }
8614 if (elen)
8615 elen += sizeof(struct sadb_supported);
1c79356b 8616#endif
39236c6e
A		 8617
8618 len = sizeof(struct sadb_msg) + alen + elen;
8619
8620 if (len > MCLBYTES)
8621 return key_senderror(so, m, ENOBUFS);
8622
8623 MGETHDR(n, M_WAITOK, MT_DATA);
8624 if (n && len > MHLEN) {
8625 MCLGET(n, M_WAITOK);
8626 if ((n->m_flags & M_EXT) == 0) {
8627 m_freem(n);
8628 n = NULL;
8629 }
9bccf70c 8630 }
39236c6e
A		 8631 if (!n)
8632 return key_senderror(so, m, ENOBUFS);
8633
8634 n->m_pkthdr.len = n->m_len = len;
8635 n->m_next = NULL;
8636 off = 0;
8637
8638 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
8639 newmsg = mtod(n, struct sadb_msg *);
8640 newmsg->sadb_msg_errno = 0;
8641 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
8642 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
8643
8644 /* for authentication algorithm */
8645 if (alen) {
8646 sup = (struct sadb_supported *)(void *)(mtod(n, caddr_t) + off);
8647 sup->sadb_supported_len = PFKEY_UNIT64(alen);
8648 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
8649 off += PFKEY_ALIGN8(sizeof(*sup));
8650
8651 for (i = 1; i <= SADB_AALG_MAX; i++) {
8652 const struct ah_algorithm *aalgo;
8653
8654 aalgo = ah_algorithm_lookup(i);
8655 if (!aalgo)
8656 continue;
8657 alg = (struct sadb_alg *)
316670eb 8658 (void *)(mtod(n, caddr_t) + off);
39236c6e
A		 8659 alg->sadb_alg_id = i;
8660 alg->sadb_alg_ivlen = 0;
8661 alg->sadb_alg_minbits = aalgo->keymin;
8662 alg->sadb_alg_maxbits = aalgo->keymax;
8663 off += PFKEY_ALIGN8(sizeof(*alg));
8664 }
9bccf70c 8665 }
39236c6e 8666
1c79356b 8667#if IPSEC_ESP
39236c6e
A		 8668 /* for encryption algorithm */
8669 if (elen) {
8670 sup = (struct sadb_supported *)(void *)(mtod(n, caddr_t) + off);
8671 sup->sadb_supported_len = PFKEY_UNIT64(elen);
8672 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
8673 off += PFKEY_ALIGN8(sizeof(*sup));
8674
8675 for (i = 1; i <= SADB_EALG_MAX; i++) {
8676 const struct esp_algorithm *ealgo;
8677
8678 ealgo = esp_algorithm_lookup(i);
8679 if (!ealgo)
8680 continue;
8681 alg = (struct sadb_alg *)
316670eb 8682 (void *)(mtod(n, caddr_t) + off);
39236c6e
A		 8683 alg->sadb_alg_id = i;
8684 if (ealgo && ealgo->ivlen) {
8685 /*
8686 * give NULL to get the value preferred by
8687 * algorithm XXX SADB_X_EXT_DERIV ?
8688 */
8689 alg->sadb_alg_ivlen =
9bccf70c 8690 (*ealgo->ivlen)(ealgo, NULL);
39236c6e
A		 8691 } else
8692 alg->sadb_alg_ivlen = 0;
8693 alg->sadb_alg_minbits = ealgo->keymin;
8694 alg->sadb_alg_maxbits = ealgo->keymax;
8695 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
8696 }
9bccf70c 8697 }
1c79356b 8698#endif
39236c6e 8699
9bccf70c 8700#if DIGAGNOSTIC
39236c6e
A		 8701 if (off != len)
8702 panic("length assumption failed in key_register");
9bccf70c 8703#endif
39236c6e
A		 8704
8705 m_freem(m);
8706 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
9bccf70c 8707 }
1c79356b
A		 8708}
8709
fe8ab488
A		 8710static void
8711key_delete_all_for_socket (struct socket *so)
8712{
8713 struct secashead *sah, *nextsah;
8714 struct secasvar *sav, *nextsav;
8715 u_int stateidx;
8716 u_int state;
8717
8718 for (sah = LIST_FIRST(&sahtree);
8719 sah != NULL;
8720 sah = nextsah) {
8721 nextsah = LIST_NEXT(sah, chain);
8722 for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_alive); stateidx++) {
8723 state = saorder_state_any[stateidx];
8724 for (sav = LIST_FIRST(&sah->savtree[state]); sav != NULL; sav = nextsav) {
8725 nextsav = LIST_NEXT(sav, chain);
8726 if (sav->flags2 & SADB_X_EXT_SA2_DELETE_ON_DETACH &&
8727 sav->so == so) {
8728 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
8729 key_freesav(sav, KEY_SADB_LOCKED);
8730 }
8731 }
8732 }
8733 }
8734}
8735
1c79356b
A		 8736/*
8737 * free secreg entry registered.
8738 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
8739 */
8740void
6d2010ae 8741key_freereg(
39236c6e 8742 struct socket *so)
1c79356b
A		 8743{
8744 struct secreg *reg;
8745 int i;
2d21ac55 8746
1c79356b
A		 8747 /* sanity check */
8748 if (so == NULL)
8749 panic("key_freereg: NULL pointer is passed.\n");
39236c6e 8750
1c79356b
A		 8751 /*
8752 * check whether existing or not.
8753 * check all type of SA, because there is a potential that
8754 * one socket is registered to multiple type of SA.
8755 */
2d21ac55 8756 lck_mtx_lock(sadb_mutex);
fe8ab488 8757 key_delete_all_for_socket(so);
1c79356b
A		 8758 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
8759 LIST_FOREACH(reg, &regtree[i], chain) {
8760 if (reg->so == so
39236c6e 8761 && __LIST_CHAINED(reg)) {
1c79356b
A		 8762 LIST_REMOVE(reg, chain);
8763 KFREE(reg);
8764 break;
8765 }
8766 }
8767 }
2d21ac55 8768 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 8769 return;
8770}
8771
8772/*
8773 * SADB_EXPIRE processing
8774 * send
9bccf70c 8775 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
1c79356b
A		 8776 * to KMD by PF_KEY.
8777 * NOTE: We send only soft lifetime extension.
8778 *
8779 * OUT: 0 : succeed
8780 * others : error number
8781 */
8782static int
6d2010ae 8783key_expire(
39236c6e 8784 struct secasvar *sav)
1c79356b 8785{
1c79356b 8786 int satype;
9bccf70c
A		 8787 struct mbuf *result = NULL, *m;
8788 int len;
8789 int error = -1;
8790 struct sadb_lifetime *lt;
39236c6e 8791
2d21ac55
A		 8792 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
8793
1c79356b
A		 8794 /* sanity check */
8795 if (sav == NULL)
8796 panic("key_expire: NULL pointer is passed.\n");
8797 if (sav->sah == NULL)
8798 panic("key_expire: Why was SA index in SA NULL.\n");
8799 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
8800 panic("key_expire: invalid proto is passed.\n");
39236c6e 8801
9bccf70c
A		 8802 /* set msg header */
8803 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
8804 if (!m) {
8805 error = ENOBUFS;
8806 goto fail;
1c79356b 8807 }
9bccf70c 8808 result = m;
39236c6e 8809
9bccf70c
A		 8810 /* create SA extension */
8811 m = key_setsadbsa(sav);
8812 if (!m) {
8813 error = ENOBUFS;
8814 goto fail;
8815 }
8816 m_cat(result, m);
39236c6e 8817
1c79356b 8818 /* create SA extension */
55e303ae 8819 m = key_setsadbxsa2(sav->sah->saidx.mode,
39236c6e 8820 sav->replay ? sav->replay->count : 0,
fe8ab488
A		 8821 sav->sah->saidx.reqid,
8822 sav->flags2);
9bccf70c
A		 8823 if (!m) {
8824 error = ENOBUFS;
8825 goto fail;
8826 }
8827 m_cat(result, m);
39236c6e 8828
9bccf70c
A		 8829 /* create lifetime extension (current and soft) */
8830 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
8831 m = key_alloc_mbuf(len);
8832 if (!m || m->m_next) { /*XXX*/
8833 if (m)
8834 m_freem(m);
8835 error = ENOBUFS;
8836 goto fail;
8837 }
8838 bzero(mtod(m, caddr_t), len);
8839 lt = mtod(m, struct sadb_lifetime *);
8840 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
8841 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
8842 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
8843 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
8844 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
8845 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
316670eb 8846 lt = (struct sadb_lifetime *)(void *)(mtod(m, caddr_t) + len / 2);
9bccf70c
A		 8847 bcopy(sav->lft_s, lt, sizeof(*lt));
8848 m_cat(result, m);
39236c6e 8849
1c79356b 8850 /* set sadb_address for source */
9bccf70c 8851 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
39236c6e
A		 8852 (struct sockaddr *)&sav->sah->saidx.src,
8853 FULLMASK, IPSEC_ULPROTO_ANY);
9bccf70c
A		 8854 if (!m) {
8855 error = ENOBUFS;
8856 goto fail;
8857 }
8858 m_cat(result, m);
39236c6e 8859
1c79356b 8860 /* set sadb_address for destination */
9bccf70c 8861 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
39236c6e
A		 8862 (struct sockaddr *)&sav->sah->saidx.dst,
8863 FULLMASK, IPSEC_ULPROTO_ANY);
9bccf70c
A		 8864 if (!m) {
8865 error = ENOBUFS;
8866 goto fail;
8867 }
8868 m_cat(result, m);
39236c6e 8869
9bccf70c
A		 8870 if ((result->m_flags & M_PKTHDR) == 0) {
8871 error = EINVAL;
8872 goto fail;
8873 }
39236c6e 8874
9bccf70c
A		 8875 if (result->m_len < sizeof(struct sadb_msg)) {
8876 result = m_pullup(result, sizeof(struct sadb_msg));
8877 if (result == NULL) {
8878 error = ENOBUFS;
8879 goto fail;
8880 }
8881 }
39236c6e 8882
9bccf70c
A		 8883 result->m_pkthdr.len = 0;
8884 for (m = result; m; m = m->m_next)
8885 result->m_pkthdr.len += m->m_len;
39236c6e 8886
9bccf70c 8887 mtod(result, struct sadb_msg *)->sadb_msg_len =
39236c6e
A		 8888 PFKEY_UNIT64(result->m_pkthdr.len);
8889
9bccf70c 8890 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
39236c6e
A		 8891
8892fail:
9bccf70c
A		 8893 if (result)
8894 m_freem(result);
1c79356b 8895 return error;
1c79356b
A		 8896}
8897
8898/*
8899 * SADB_FLUSH processing
8900 * receive
8901 * <base>
8902 * from the ikmpd, and free all entries in secastree.
8903 * and send,
8904 * <base>
8905 * to the ikmpd.
8906 * NOTE: to do is only marking SADB_SASTATE_DEAD.
8907 *
9bccf70c 8908 * m will always be freed.
1c79356b 8909 */
9bccf70c 8910static int
6d2010ae 8911key_flush(
39236c6e
A		 8912 struct socket *so,
8913 struct mbuf *m,
8914 const struct sadb_msghdr *mhp)
1c79356b 8915{
9bccf70c 8916 struct sadb_msg *newmsg;
1c79356b
A		 8917 struct secashead *sah, *nextsah;
8918 struct secasvar *sav, *nextsav;
8919 u_int16_t proto;
8920 u_int8_t state;
8921 u_int stateidx;
2d21ac55 8922
1c79356b 8923 /* sanity check */
9bccf70c 8924 if (so == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 8925 panic("key_flush: NULL pointer is passed.\n");
39236c6e 8926
1c79356b 8927 /* map satype to proto */
9bccf70c 8928 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 8929 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
9bccf70c 8930 return key_senderror(so, m, EINVAL);
1c79356b 8931 }
39236c6e 8932
2d21ac55
A		 8933 lck_mtx_lock(sadb_mutex);
8934
1c79356b
A		 8935 /* no SATYPE specified, i.e. flushing all SA. */
8936 for (sah = LIST_FIRST(&sahtree);
8937 sah != NULL;
8938 sah = nextsah) {
1c79356b 8939 nextsah = LIST_NEXT(sah, chain);
39236c6e 8940
9bccf70c 8941 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
39236c6e 8942 && proto != sah->saidx.proto)
1c79356b 8943 continue;
39236c6e 8944
1c79356b
A		 8945 for (stateidx = 0;
8946 stateidx < _ARRAYLEN(saorder_state_alive);
8947 stateidx++) {
1c79356b
A		 8948 state = saorder_state_any[stateidx];
8949 for (sav = LIST_FIRST(&sah->savtree[state]);
8950 sav != NULL;
8951 sav = nextsav) {
39236c6e 8952
1c79356b 8953 nextsav = LIST_NEXT(sav, chain);
39236c6e 8954
1c79356b 8955 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
2d21ac55 8956 key_freesav(sav, KEY_SADB_LOCKED);
1c79356b
A		 8957 }
8958 }
39236c6e 8959
1c79356b
A		 8960 sah->state = SADB_SASTATE_DEAD;
8961 }
2d21ac55
A		 8962 lck_mtx_unlock(sadb_mutex);
8963
9bccf70c
A		 8964 if (m->m_len < sizeof(struct sadb_msg) ||
8965 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
55e303ae 8966 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
9bccf70c 8967 return key_senderror(so, m, ENOBUFS);
1c79356b 8968 }
39236c6e 8969
9bccf70c
A		 8970 if (m->m_next)
8971 m_freem(m->m_next);
8972 m->m_next = NULL;
8973 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
8974 newmsg = mtod(m, struct sadb_msg *);
1c79356b 8975 newmsg->sadb_msg_errno = 0;
9bccf70c 8976 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
39236c6e 8977
9bccf70c 8978 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
1c79356b
A		 8979}
8980
8981/*
8982 * SADB_DUMP processing
8983 * dump all entries including status of DEAD in SAD.
8984 * receive
8985 * <base>
8986 * from the ikmpd, and dump all secasvar leaves
8987 * and send,
8988 * <base> .....
8989 * to the ikmpd.
8990 *
9bccf70c 8991 * m will always be freed.
1c79356b 8992 */
39236c6e 8993
2d21ac55
A		 8994struct sav_dump_elem {
8995 struct secasvar *sav;
8996 u_int8_t satype;
8997};
8998
1c79356b 8999static int
6d2010ae 9000key_dump(
39236c6e
A		 9001 struct socket *so,
9002 struct mbuf *m,
9003 const struct sadb_msghdr *mhp)
1c79356b 9004{
1c79356b
A		 9005 struct secashead *sah;
9006 struct secasvar *sav;
2d21ac55 9007 struct sav_dump_elem *savbuf = NULL, *elem_ptr;
1c79356b
A		 9008 u_int16_t proto;
9009 u_int stateidx;
9010 u_int8_t satype;
9011 u_int8_t state;
2d21ac55 9012 int cnt = 0, cnt2, bufcount;
9bccf70c 9013 struct mbuf *n;
2d21ac55 9014 int error = 0;
39236c6e 9015
2d21ac55
A		 9016 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
9017
1c79356b 9018 /* sanity check */
9bccf70c 9019 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 9020 panic("key_dump: NULL pointer is passed.\n");
39236c6e 9021
1c79356b 9022 /* map satype to proto */
9bccf70c 9023 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
55e303ae 9024 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
9bccf70c 9025 return key_senderror(so, m, EINVAL);
1c79356b 9026 }
39236c6e 9027
2d21ac55
A		 9028 if ((bufcount = ipsec_sav_count) <= 0) {
9029 error = ENOENT;
9030 goto end;
9031 }
9032 bufcount += 512; /* extra */
9033 KMALLOC_WAIT(savbuf, struct sav_dump_elem*, bufcount * sizeof(struct sav_dump_elem));
9034 if (savbuf == NULL) {
9035 ipseclog((LOG_DEBUG, "key_dump: No more memory.\n"));
9036 error = ENOMEM;
9037 goto end;
9038 }
39236c6e 9039
1c79356b 9040 /* count sav entries to be sent to the userland. */
2d21ac55
A		 9041 lck_mtx_lock(sadb_mutex);
9042 elem_ptr = savbuf;
1c79356b 9043 LIST_FOREACH(sah, &sahtree, chain) {
9bccf70c 9044 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
39236c6e 9045 && proto != sah->saidx.proto)
1c79356b 9046 continue;
2d21ac55
A		 9047
9048 /* map proto to satype */
9049 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
9050 lck_mtx_unlock(sadb_mutex);
9051 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n"));
9052 error = EINVAL;
9053 goto end;
9054 }
39236c6e 9055
1c79356b
A		 9056 for (stateidx = 0;
9057 stateidx < _ARRAYLEN(saorder_state_any);
9058 stateidx++) {
1c79356b
A		 9059 state = saorder_state_any[stateidx];
9060 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2d21ac55
A		 9061 if (cnt == bufcount)
9062 break; /* out of buffer space */
9063 elem_ptr->sav = sav;
9064 elem_ptr->satype = satype;
9065 sav->refcnt++;
9066 elem_ptr++;
39236c6e 9067 cnt++;
1c79356b
A		 9068 }
9069 }
9070 }
2d21ac55 9071 lck_mtx_unlock(sadb_mutex);
39236c6e 9072
2d21ac55
A		 9073 if (cnt == 0) {
9074 error = ENOENT;
9075 goto end;
9076 }
39236c6e 9077
1c79356b 9078 /* send this to the userland, one at a time. */
2d21ac55
A		 9079 elem_ptr = savbuf;
9080 cnt2 = cnt;
9081 while (cnt2) {
9082 n = key_setdumpsa(elem_ptr->sav, SADB_DUMP, elem_ptr->satype,
39236c6e 9083 --cnt2, mhp->msg->sadb_msg_pid);
2d21ac55
A		 9084
9085 if (!n) {
9086 error = ENOBUFS;
9087 goto end;
1c79356b 9088 }
39236c6e 9089
2d21ac55
A		 9090 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
9091 elem_ptr++;
9092 }
39236c6e 9093
2d21ac55
A		 9094end:
9095 if (savbuf) {
9096 if (cnt) {
9097 elem_ptr = savbuf;
9098 lck_mtx_lock(sadb_mutex);
9099 while (cnt--)
9100 key_freesav((elem_ptr++)->sav, KEY_SADB_LOCKED);
9101 lck_mtx_unlock(sadb_mutex);
1c79356b 9102 }
2d21ac55 9103 KFREE(savbuf);
1c79356b 9104 }
39236c6e 9105
2d21ac55
A		 9106 if (error)
9107 return key_senderror(so, m, error);
39236c6e 9108
9bccf70c 9109 m_freem(m);
1c79356b
A		 9110 return 0;
9111}
9112
9113/*
9114 * SADB_X_PROMISC processing
9bccf70c
A		 9115 *
9116 * m will always be freed.
1c79356b 9117 */
9bccf70c 9118static int
6d2010ae 9119key_promisc(
39236c6e
A		 9120 struct socket *so,
9121 struct mbuf *m,
9122 const struct sadb_msghdr *mhp)
1c79356b 9123{
1c79356b 9124 int olen;
2d21ac55 9125
1c79356b 9126 /* sanity check */
9bccf70c 9127 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1c79356b 9128 panic("key_promisc: NULL pointer is passed.\n");
39236c6e 9129
9bccf70c 9130 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
39236c6e 9131
1c79356b 9132 if (olen < sizeof(struct sadb_msg)) {
9bccf70c
A		 9133#if 1
9134 return key_senderror(so, m, EINVAL);
9135#else
9136 m_freem(m);
9137 return 0;
9138#endif
1c79356b
A		 9139 } else if (olen == sizeof(struct sadb_msg)) {
9140 /* enable/disable promisc mode */
9141 struct keycb *kp;
91447636
A		 9142
9143 socket_lock(so, 1);
9bccf70c
A		 9144 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
9145 return key_senderror(so, m, EINVAL);
9146 mhp->msg->sadb_msg_errno = 0;
9147 switch (mhp->msg->sadb_msg_satype) {
39236c6e
A		 9148 case 0:
9149 case 1:
9150 kp->kp_promisc = mhp->msg->sadb_msg_satype;
9151 break;
9152 default:
9153 socket_unlock(so, 1);
9154 return key_senderror(so, m, EINVAL);
1c79356b 9155 }
91447636 9156 socket_unlock(so, 1);
39236c6e 9157
1c79356b 9158 /* send the original message back to everyone */
9bccf70c
A		 9159 mhp->msg->sadb_msg_errno = 0;
9160 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
1c79356b
A		 9161 } else {
9162 /* send packet as is */
39236c6e 9163
9bccf70c 9164 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
39236c6e 9165
9bccf70c
A		 9166 /* TODO: if sadb_msg_seq is specified, send to specific pid */
9167 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
1c79356b
A		 9168 }
9169}
9170
91447636 9171static int (*key_typesw[])(struct socket *, struct mbuf *,
39236c6e 9172 const struct sadb_msghdr *) = {
9bccf70c
A		 9173 NULL, /* SADB_RESERVED */
9174 key_getspi, /* SADB_GETSPI */
9175 key_update, /* SADB_UPDATE */
9176 key_add, /* SADB_ADD */
9177 key_delete, /* SADB_DELETE */
9178 key_get, /* SADB_GET */
9179 key_acquire2, /* SADB_ACQUIRE */
9180 key_register, /* SADB_REGISTER */
9181 NULL, /* SADB_EXPIRE */
9182 key_flush, /* SADB_FLUSH */
9183 key_dump, /* SADB_DUMP */
9184 key_promisc, /* SADB_X_PROMISC */
9185 NULL, /* SADB_X_PCHANGE */
9186 key_spdadd, /* SADB_X_SPDUPDATE */
9187 key_spdadd, /* SADB_X_SPDADD */
9188 key_spddelete, /* SADB_X_SPDDELETE */
9189 key_spdget, /* SADB_X_SPDGET */
9190 NULL, /* SADB_X_SPDACQUIRE */
9191 key_spddump, /* SADB_X_SPDDUMP */
9192 key_spdflush, /* SADB_X_SPDFLUSH */
9193 key_spdadd, /* SADB_X_SPDSETIDX */
9194 NULL, /* SADB_X_SPDEXPIRE */
9195 key_spddelete2, /* SADB_X_SPDDELETE2 */
b0d623f7 9196 key_getsastat, /* SADB_GETSASTAT */
39236c6e
A		 9197 key_spdenable, /* SADB_X_SPDENABLE */
9198 key_spddisable, /* SADB_X_SPDDISABLE */
3e170ce0 9199 key_migrate, /* SADB_MIGRATE */
9bccf70c 9200};
1c79356b 9201
3e170ce0
A		 9202static void
9203bzero_mbuf(struct mbuf *m)
9204{
9205 struct mbuf *mptr = m;
9206 struct sadb_msg *msg = NULL;
9207 int offset = 0;
9208
9209 if (!mptr) {
9210 return;
9211 }
9212
9213 if (mptr->m_len >= sizeof(struct sadb_msg)) {
9214 msg = mtod(mptr, struct sadb_msg *);
9215 if (msg->sadb_msg_type != SADB_ADD &&
9216 msg->sadb_msg_type != SADB_UPDATE) {
9217 return;
9218 }
9219 offset = sizeof(struct sadb_msg);
9220 }
9221 bzero(mptr->m_data+offset, mptr->m_len-offset);
9222 mptr = mptr->m_next;
9223 while (mptr != NULL) {
9224 bzero(mptr->m_data, mptr->m_len);
9225 mptr = mptr->m_next;
9226 }
9227}
9228
9229static void
ecc0ceb4 9230bzero_keys(const struct sadb_msghdr *mh)
3e170ce0
A		 9231{
9232 int extlen = 0;
9233 int offset = 0;
9234
9235 if (!mh) {
9236 return;
9237 }
9238 offset = sizeof(struct sadb_key);
9239
9240 if (mh->ext[SADB_EXT_KEY_ENCRYPT]) {
9241 struct sadb_key *key = (struct sadb_key*)mh->ext[SADB_EXT_KEY_ENCRYPT];
9242 extlen = key->sadb_key_bits >> 3;
9243
9244 if (mh->extlen[SADB_EXT_KEY_ENCRYPT] >= offset + extlen) {
9245 bzero((uint8_t *)mh->ext[SADB_EXT_KEY_ENCRYPT]+offset, extlen);
9246 } else {
9247 bzero(mh->ext[SADB_EXT_KEY_ENCRYPT], mh->extlen[SADB_EXT_KEY_ENCRYPT]);
9248 }
9249 }
9250 if (mh->ext[SADB_EXT_KEY_AUTH]) {
9251 struct sadb_key *key = (struct sadb_key*)mh->ext[SADB_EXT_KEY_AUTH];
9252 extlen = key->sadb_key_bits >> 3;
9253
9254 if (mh->extlen[SADB_EXT_KEY_AUTH] >= offset + extlen) {
9255 bzero((uint8_t *)mh->ext[SADB_EXT_KEY_AUTH]+offset, extlen);
9256 } else {
9257 bzero(mh->ext[SADB_EXT_KEY_AUTH], mh->extlen[SADB_EXT_KEY_AUTH]);
9258 }
9259 }
9260}
9261
1c79356b
A		 9262/*
9263 * parse sadb_msg buffer to process PFKEYv2,
9264 * and create a data to response if needed.
9265 * I think to be dealed with mbuf directly.
9266 * IN:
9267 * msgp : pointer to pointer to a received buffer pulluped.
9268 * This is rewrited to response.
9269 * so : pointer to socket.
9270 * OUT:
9271 * length for buffer to send to user process.
9272 */
9273int
6d2010ae 9274key_parse(
39236c6e
A		 9275 struct mbuf *m,
9276 struct socket *so)
1c79356b 9277{
9bccf70c
A		 9278 struct sadb_msg *msg;
9279 struct sadb_msghdr mh;
1c79356b
A		 9280 u_int orglen;
9281 int error;
9bccf70c 9282 int target;
3e170ce0
A		 9283 Boolean keyAligned = FALSE;
9284
2d21ac55
A		 9285 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
9286
1c79356b 9287 /* sanity check */
9bccf70c 9288 if (m == NULL || so == NULL)
1c79356b 9289 panic("key_parse: NULL pointer is passed.\n");
39236c6e 9290
9bccf70c 9291#if 0 /*kdebug_sadb assumes msg in linear buffer*/
1c79356b 9292 KEYDEBUG(KEYDEBUG_KEY_DUMP,
39236c6e
A		 9293 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
9294 kdebug_sadb(msg));
9bccf70c 9295#endif
39236c6e 9296
9bccf70c
A		 9297 if (m->m_len < sizeof(struct sadb_msg)) {
9298 m = m_pullup(m, sizeof(struct sadb_msg));
9299 if (!m)
9300 return ENOBUFS;
9301 }
9302 msg = mtod(m, struct sadb_msg *);
1c79356b 9303 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
9bccf70c 9304 target = KEY_SENDUP_ONE;
39236c6e 9305
9bccf70c
A		 9306 if ((m->m_flags & M_PKTHDR) == 0 ||
9307 m->m_pkthdr.len != m->m_pkthdr.len) {
55e303ae 9308 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
2d21ac55 9309 PFKEY_STAT_INCREMENT(pfkeystat.out_invlen);
9bccf70c
A		 9310 error = EINVAL;
9311 goto senderror;
9312 }
39236c6e 9313
1c79356b 9314 if (msg->sadb_msg_version != PF_KEY_V2) {
55e303ae 9315 ipseclog((LOG_DEBUG,
39236c6e
A		 9316 "key_parse: PF_KEY version %u is mismatched.\n",
9317 msg->sadb_msg_version));
2d21ac55 9318 PFKEY_STAT_INCREMENT(pfkeystat.out_invver);
9bccf70c
A		 9319 error = EINVAL;
9320 goto senderror;
1c79356b 9321 }
39236c6e 9322
1c79356b 9323 if (msg->sadb_msg_type > SADB_MAX) {
55e303ae 9324 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
39236c6e 9325 msg->sadb_msg_type));
2d21ac55 9326 PFKEY_STAT_INCREMENT(pfkeystat.out_invmsgtype);
9bccf70c
A		 9327 error = EINVAL;
9328 goto senderror;
9329 }
39236c6e 9330
9bccf70c
A		 9331 /* for old-fashioned code - should be nuked */
9332 if (m->m_pkthdr.len > MCLBYTES) {
9333 m_freem(m);
9334 return ENOBUFS;
9335 }
9336 if (m->m_next) {
9337 struct mbuf *n;
39236c6e 9338
316670eb 9339 MGETHDR(n, M_WAITOK, MT_DATA);
9bccf70c 9340 if (n && m->m_pkthdr.len > MHLEN) {
316670eb 9341 MCLGET(n, M_WAITOK);
9bccf70c
A		 9342 if ((n->m_flags & M_EXT) == 0) {
9343 m_free(n);
9344 n = NULL;
9345 }
9346 }
9347 if (!n) {
3e170ce0 9348 bzero_mbuf(m);
9bccf70c
A		 9349 m_freem(m);
9350 return ENOBUFS;
9351 }
9352 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
9353 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
9354 n->m_next = NULL;
3e170ce0 9355 bzero_mbuf(m);
9bccf70c
A		 9356 m_freem(m);
9357 m = n;
1c79356b 9358 }
39236c6e 9359
9bccf70c
A		 9360 /* align the mbuf chain so that extensions are in contiguous region. */
9361 error = key_align(m, &mh);
9362 if (error)
9363 return error;
39236c6e 9364
9bccf70c 9365 if (m->m_next) { /*XXX*/
3e170ce0 9366 bzero_mbuf(m);
9bccf70c
A		 9367 m_freem(m);
9368 return ENOBUFS;
1c79356b 9369 }
39236c6e 9370
3e170ce0 9371 keyAligned = TRUE;
9bccf70c 9372 msg = mh.msg;
39236c6e 9373
1c79356b
A		 9374 /* check SA type */
9375 switch (msg->sadb_msg_satype) {
39236c6e
A		 9376 case SADB_SATYPE_UNSPEC:
9377 switch (msg->sadb_msg_type) {
9378 case SADB_GETSPI:
9379 case SADB_UPDATE:
9380 case SADB_ADD:
9381 case SADB_DELETE:
9382 case SADB_GET:
9383 case SADB_ACQUIRE:
9384 case SADB_EXPIRE:
9385 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
9386 "when msg type=%u.\n", msg->sadb_msg_type));
9387 PFKEY_STAT_INCREMENT(pfkeystat.out_invsatype);
9388 error = EINVAL;
9389 goto senderror;
9390 }
9391 break;
9392 case SADB_SATYPE_AH:
9393 case SADB_SATYPE_ESP:
9394 case SADB_X_SATYPE_IPCOMP:
9395 switch (msg->sadb_msg_type) {
9396 case SADB_X_SPDADD:
9397 case SADB_X_SPDDELETE:
9398 case SADB_X_SPDGET:
9399 case SADB_X_SPDDUMP:
9400 case SADB_X_SPDFLUSH:
9401 case SADB_X_SPDSETIDX:
9402 case SADB_X_SPDUPDATE:
9403 case SADB_X_SPDDELETE2:
9404 case SADB_X_SPDENABLE:
9405 case SADB_X_SPDDISABLE:
9406 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
9407 msg->sadb_msg_type));
9408 PFKEY_STAT_INCREMENT(pfkeystat.out_invsatype);
9409 error = EINVAL;
9410 goto senderror;
9411 }
9412 break;
9413 case SADB_SATYPE_RSVP:
9414 case SADB_SATYPE_OSPFV2:
9415 case SADB_SATYPE_RIPV2:
9416 case SADB_SATYPE_MIP:
9417 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
9418 msg->sadb_msg_satype));
2d21ac55 9419 PFKEY_STAT_INCREMENT(pfkeystat.out_invsatype);
39236c6e 9420 error = EOPNOTSUPP;
9bccf70c 9421 goto senderror;
39236c6e
A		 9422 case 1: /* XXX: What does it do? */
9423 if (msg->sadb_msg_type == SADB_X_PROMISC)
9424 break;
9425 /*FALLTHROUGH*/
9426 default:
9427 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
9428 msg->sadb_msg_satype));
2d21ac55 9429 PFKEY_STAT_INCREMENT(pfkeystat.out_invsatype);
9bccf70c
A		 9430 error = EINVAL;
9431 goto senderror;
1c79356b 9432 }
39236c6e 9433
1c79356b 9434 /* check field of upper layer protocol and address family */
9bccf70c 9435 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
39236c6e 9436 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
1c79356b 9437 struct sadb_address *src0, *dst0;
9bccf70c 9438 u_int plen;
39236c6e 9439
9bccf70c
A		 9440 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
9441 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
39236c6e 9442
1c79356b
A		 9443 /* check upper layer protocol */
9444 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
55e303ae 9445 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
2d21ac55 9446 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
9bccf70c
A		 9447 error = EINVAL;
9448 goto senderror;
1c79356b 9449 }
39236c6e 9450
1c79356b 9451 /* check family */
9bccf70c
A		 9452 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
9453 PFKEY_ADDR_SADDR(dst0)->sa_family) {
55e303ae 9454 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
2d21ac55 9455 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
9bccf70c
A		 9456 error = EINVAL;
9457 goto senderror;
1c79356b 9458 }
9bccf70c
A		 9459 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
9460 PFKEY_ADDR_SADDR(dst0)->sa_len) {
55e303ae 9461 ipseclog((LOG_DEBUG,
39236c6e 9462 "key_parse: address struct size mismatched.\n"));
2d21ac55 9463 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
9bccf70c
A		 9464 error = EINVAL;
9465 goto senderror;
1c79356b 9466 }
39236c6e 9467
1c79356b 9468 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
39236c6e
A		 9469 case AF_INET:
9470 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
9471 sizeof(struct sockaddr_in)) {
9472 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
9473 error = EINVAL;
9474 goto senderror;
9475 }
9476 break;
9477 case AF_INET6:
9478 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
9479 sizeof(struct sockaddr_in6)) {
9480 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
9481 error = EINVAL;
9482 goto senderror;
9483 }
9484 break;
9485 default:
9486 ipseclog((LOG_DEBUG,
9487 "key_parse: unsupported address family.\n"));
2d21ac55 9488 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
39236c6e 9489 error = EAFNOSUPPORT;
9bccf70c 9490 goto senderror;
1c79356b 9491 }
39236c6e 9492
9bccf70c 9493 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
39236c6e
A		 9494 case AF_INET:
9495 plen = sizeof(struct in_addr) << 3;
9496 break;
9497 case AF_INET6:
9498 plen = sizeof(struct in6_addr) << 3;
9499 break;
9500 default:
9501 plen = 0; /*fool gcc*/
9502 break;
1c79356b 9503 }
39236c6e 9504
9bccf70c
A		 9505 /* check max prefix length */
9506 if (src0->sadb_address_prefixlen > plen ||
9507 dst0->sadb_address_prefixlen > plen) {
55e303ae 9508 ipseclog((LOG_DEBUG,
39236c6e 9509 "key_parse: illegal prefixlen.\n"));
2d21ac55 9510 PFKEY_STAT_INCREMENT(pfkeystat.out_invaddr);
9bccf70c
A		 9511 error = EINVAL;
9512 goto senderror;
1c79356b 9513 }
39236c6e 9514
9bccf70c
A		 9515 /*
9516 * prefixlen == 0 is valid because there can be a case when
9517 * all addresses are matched.
9518 */
9519 }
39236c6e 9520
9bccf70c
A		 9521 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
9522 key_typesw[msg->sadb_msg_type] == NULL) {
2d21ac55 9523 PFKEY_STAT_INCREMENT(pfkeystat.out_invmsgtype);
9bccf70c
A		 9524 error = EINVAL;
9525 goto senderror;
9526 }
39236c6e 9527
3e170ce0
A		 9528 error = (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
9529
3e170ce0
A		 9530 return error;
9531
9bccf70c 9532senderror:
3e170ce0
A		 9533 if (keyAligned) {
9534 bzero_keys(&mh);
9535 } else {
9536 bzero_mbuf(m);
9537 }
9bccf70c
A		 9538 msg->sadb_msg_errno = error;
9539 return key_sendup_mbuf(so, m, target);
9540}
1c79356b 9541
9bccf70c 9542static int
6d2010ae 9543key_senderror(
39236c6e
A		 9544 struct socket *so,
9545 struct mbuf *m,
9546 int code)
9bccf70c
A		 9547{
9548 struct sadb_msg *msg;
39236c6e 9549
2d21ac55
A		 9550 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
9551
9bccf70c
A		 9552 if (m->m_len < sizeof(struct sadb_msg))
9553 panic("invalid mbuf passed to key_senderror");
39236c6e 9554
9bccf70c
A		 9555 msg = mtod(m, struct sadb_msg *);
9556 msg->sadb_msg_errno = code;
9557 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
1c79356b
A		 9558}
9559
9560/*
9561 * set the pointer to each header into message buffer.
9bccf70c
A		 9562 * m will be freed on error.
9563 * XXX larger-than-MCLBYTES extension?
1c79356b
A		 9564 */
9565static int
6d2010ae 9566key_align(
39236c6e
A		 9567 struct mbuf *m,
9568 struct sadb_msghdr *mhp)
1c79356b 9569{
9bccf70c 9570 struct mbuf *n;
1c79356b 9571 struct sadb_ext *ext;
9bccf70c
A		 9572 size_t off, end;
9573 int extlen;
9574 int toff;
39236c6e 9575
1c79356b 9576 /* sanity check */
9bccf70c 9577 if (m == NULL || mhp == NULL)
1c79356b 9578 panic("key_align: NULL pointer is passed.\n");
9bccf70c
A		 9579 if (m->m_len < sizeof(struct sadb_msg))
9580 panic("invalid mbuf passed to key_align");
39236c6e 9581
1c79356b 9582 /* initialize */
9bccf70c 9583 bzero(mhp, sizeof(*mhp));
39236c6e 9584
9bccf70c
A		 9585 mhp->msg = mtod(m, struct sadb_msg *);
9586 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
39236c6e 9587
9bccf70c
A		 9588 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
9589 extlen = end; /*just in case extlen is not updated*/
9590 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
9591 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
9592 if (!n) {
9593 /* m is already freed */
9594 return ENOBUFS;
9595 }
316670eb 9596 ext = (struct sadb_ext *)(void *)(mtod(n, caddr_t) + toff);
39236c6e 9597
1c79356b
A		 9598 /* set pointer */
9599 switch (ext->sadb_ext_type) {
39236c6e
A		 9600 case SADB_EXT_SA:
9601 case SADB_EXT_ADDRESS_SRC:
9602 case SADB_EXT_ADDRESS_DST:
9603 case SADB_EXT_ADDRESS_PROXY:
9604 case SADB_EXT_LIFETIME_CURRENT:
9605 case SADB_EXT_LIFETIME_HARD:
9606 case SADB_EXT_LIFETIME_SOFT:
9607 case SADB_EXT_KEY_AUTH:
9608 case SADB_EXT_KEY_ENCRYPT:
9609 case SADB_EXT_IDENTITY_SRC:
9610 case SADB_EXT_IDENTITY_DST:
9611 case SADB_EXT_SENSITIVITY:
9612 case SADB_EXT_PROPOSAL:
9613 case SADB_EXT_SUPPORTED_AUTH:
9614 case SADB_EXT_SUPPORTED_ENCRYPT:
9615 case SADB_EXT_SPIRANGE:
9616 case SADB_X_EXT_POLICY:
9617 case SADB_X_EXT_SA2:
9618 case SADB_EXT_SESSION_ID:
9619 case SADB_EXT_SASTAT:
9620 case SADB_X_EXT_IPSECIF:
9621 case SADB_X_EXT_ADDR_RANGE_SRC_START:
9622 case SADB_X_EXT_ADDR_RANGE_SRC_END:
9623 case SADB_X_EXT_ADDR_RANGE_DST_START:
9624 case SADB_X_EXT_ADDR_RANGE_DST_END:
3e170ce0
A		 9625 case SADB_EXT_MIGRATE_ADDRESS_SRC:
9626 case SADB_EXT_MIGRATE_ADDRESS_DST:
9627 case SADB_X_EXT_MIGRATE_IPSECIF:
39236c6e
A		 9628 /* duplicate check */
9629 /*
9630 * XXX Are there duplication payloads of either
9631 * KEY_AUTH or KEY_ENCRYPT ?
9632 */
9633 if (mhp->ext[ext->sadb_ext_type] != NULL) {
9634 ipseclog((LOG_DEBUG,
9635 "key_align: duplicate ext_type %u "
9636 "is passed.\n", ext->sadb_ext_type));
3e170ce0 9637 bzero_mbuf(m);
39236c6e
A		 9638 m_freem(m);
9639 PFKEY_STAT_INCREMENT(pfkeystat.out_dupext);
9640 return EINVAL;
9641 }
9642 break;
9643 default:
55e303ae 9644 ipseclog((LOG_DEBUG,
39236c6e
A		 9645 "key_align: invalid ext_type %u is passed.\n",
9646 ext->sadb_ext_type));
3e170ce0 9647 bzero_mbuf(m);
9bccf70c 9648 m_freem(m);
39236c6e 9649 PFKEY_STAT_INCREMENT(pfkeystat.out_invexttype);
1c79356b 9650 return EINVAL;
1c79356b 9651 }
39236c6e 9652
1c79356b 9653 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
39236c6e 9654
9bccf70c 9655 if (key_validate_ext(ext, extlen)) {
3e170ce0 9656 bzero_mbuf(m);
9bccf70c 9657 m_freem(m);
2d21ac55 9658 PFKEY_STAT_INCREMENT(pfkeystat.out_invlen);
9bccf70c
A		 9659 return EINVAL;
9660 }
39236c6e 9661
9bccf70c
A		 9662 n = m_pulldown(m, off, extlen, &toff);
9663 if (!n) {
9664 /* m is already freed */
9665 return ENOBUFS;
9666 }
316670eb 9667 ext = (struct sadb_ext *)(void *)(mtod(n, caddr_t) + toff);
39236c6e 9668
9bccf70c
A		 9669 mhp->ext[ext->sadb_ext_type] = ext;
9670 mhp->extoff[ext->sadb_ext_type] = off;
9671 mhp->extlen[ext->sadb_ext_type] = extlen;
9672 }
39236c6e 9673
9bccf70c 9674 if (off != end) {
3e170ce0 9675 bzero_mbuf(m);
9bccf70c 9676 m_freem(m);
2d21ac55 9677 PFKEY_STAT_INCREMENT(pfkeystat.out_invlen);
9bccf70c
A		 9678 return EINVAL;
9679 }
39236c6e 9680
9bccf70c
A		 9681 return 0;
9682}
9683
9684static int
6d2010ae 9685key_validate_ext(
39236c6e
A		 9686 const struct sadb_ext *ext,
9687 int len)
9bccf70c
A		 9688{
9689 struct sockaddr *sa;
9690 enum { NONE, ADDR } checktype = NONE;
9691 int baselen;
9692 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
39236c6e 9693
9bccf70c
A		 9694 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
9695 return EINVAL;
39236c6e 9696
9bccf70c
A		 9697 /* if it does not match minimum/maximum length, bail */
9698 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
9699 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
9700 return EINVAL;
9701 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
9702 return EINVAL;
9703 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
9704 return EINVAL;
39236c6e 9705
9bccf70c
A		 9706 /* more checks based on sadb_ext_type XXX need more */
9707 switch (ext->sadb_ext_type) {
39236c6e
A		 9708 case SADB_EXT_ADDRESS_SRC:
9709 case SADB_EXT_ADDRESS_DST:
9710 case SADB_EXT_ADDRESS_PROXY:
9711 case SADB_X_EXT_ADDR_RANGE_SRC_START:
9712 case SADB_X_EXT_ADDR_RANGE_SRC_END:
9713 case SADB_X_EXT_ADDR_RANGE_DST_START:
9714 case SADB_X_EXT_ADDR_RANGE_DST_END:
3e170ce0
A		 9715 case SADB_EXT_MIGRATE_ADDRESS_SRC:
9716 case SADB_EXT_MIGRATE_ADDRESS_DST:
39236c6e 9717 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
9bccf70c 9718 checktype = ADDR;
39236c6e
A		 9719 break;
9720 case SADB_EXT_IDENTITY_SRC:
9721 case SADB_EXT_IDENTITY_DST:
9722 if (((struct sadb_ident *)(uintptr_t)(size_t)ext)->
9723 sadb_ident_type == SADB_X_IDENTTYPE_ADDR) {
9724 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
9725 checktype = ADDR;
9726 } else
9727 checktype = NONE;
9728 break;
9729 default:
9bccf70c 9730 checktype = NONE;
39236c6e 9731 break;
9bccf70c 9732 }
39236c6e 9733
9bccf70c 9734 switch (checktype) {
39236c6e
A		 9735 case NONE:
9736 break;
9737 case ADDR:
9738 sa = (struct sockaddr *)((caddr_t)(uintptr_t)ext + baselen);
9739
9740 if (len < baselen + sal)
9741 return EINVAL;
9742 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
9743 return EINVAL;
9744 break;
1c79356b 9745 }
39236c6e 9746
1c79356b
A		 9747 return 0;
9748}
9749
1c79356b
A		 9750/*
9751 * XXX: maybe This function is called after INBOUND IPsec processing.
9752 *
9753 * Special check for tunnel-mode packets.
9754 * We must make some checks for consistency between inner and outer IP header.
9755 *
9756 * xxx more checks to be provided
9757 */
9758int
2d21ac55 9759key_checktunnelsanity(
39236c6e
A		 9760 struct secasvar *sav,
9761 __unused u_int family,
9762 __unused caddr_t src,
9763 __unused caddr_t dst)
1c79356b 9764{
39236c6e 9765
1c79356b
A		 9766 /* sanity check */
9767 if (sav->sah == NULL)
9768 panic("sav->sah == NULL at key_checktunnelsanity");
39236c6e 9769
1c79356b 9770 /* XXX: check inner IP header */
39236c6e 9771
1c79356b
A		 9772 return 1;
9773}
9774
1c79356b
A		 9775/* record data transfer on SA, and update timestamps */
9776void
6d2010ae 9777key_sa_recordxfer(
39236c6e
A		 9778 struct secasvar *sav,
9779 struct mbuf *m)
1c79356b 9780{
39236c6e 9781
2d21ac55 9782
1c79356b
A		 9783 if (!sav)
9784 panic("key_sa_recordxfer called with sav == NULL");
9785 if (!m)
9786 panic("key_sa_recordxfer called with m == NULL");
9787 if (!sav->lft_c)
9788 return;
39236c6e 9789
2d21ac55 9790 lck_mtx_lock(sadb_mutex);
1c79356b
A		 9791 /*
9792 * XXX Currently, there is a difference of bytes size
9793 * between inbound and outbound processing.
9794 */
9795 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
9796 /* to check bytes lifetime is done in key_timehandler(). */
39236c6e 9797
1c79356b
A		 9798 /*
9799 * We use the number of packets as the unit of
9800 * sadb_lifetime_allocations. We increment the variable
9801 * whenever {esp,ah}_{in,out}put is called.
9802 */
9803 sav->lft_c->sadb_lifetime_allocations++;
9804 /* XXX check for expires? */
39236c6e 9805
1c79356b
A		 9806 /*
9807 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
9808 * in seconds. HARD and SOFT lifetime are measured by the time
9809 * difference (again in seconds) from sadb_lifetime_usetime.
9810 *
9811 * usetime
9812 * v expire expire
9813 * -----+-----+--------+---> t
9814 * <--------------> HARD
9815 * <-----> SOFT
9816 */
9817 {
39236c6e
A		 9818 struct timeval tv;
9819 microtime(&tv);
9820 sav->lft_c->sadb_lifetime_usetime = tv.tv_sec;
9821 /* XXX check for expires? */
1c79356b 9822 }
2d21ac55
A		 9823 lck_mtx_unlock(sadb_mutex);
9824
1c79356b
A		 9825 return;
9826}
9827
9828/* dumb version */
9829void
6d2010ae 9830key_sa_routechange(
39236c6e 9831 struct sockaddr *dst)
1c79356b
A		 9832{
9833 struct secashead *sah;
9834 struct route *ro;
2d21ac55 9835
91447636 9836 lck_mtx_lock(sadb_mutex);
1c79356b
A		 9837 LIST_FOREACH(sah, &sahtree, chain) {
9838 ro = &sah->sa_route;
9839 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
39236c6e
A		 9840 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
9841 ROUTE_RELEASE(ro);
1c79356b
A		 9842 }
9843 }
91447636 9844 lck_mtx_unlock(sadb_mutex);
39236c6e 9845
1c79356b
A		 9846 return;
9847}
9848
316670eb 9849void
6d2010ae 9850key_sa_chgstate(
39236c6e
A		 9851 struct secasvar *sav,
9852 u_int8_t state)
1c79356b 9853{
39236c6e 9854
1c79356b
A		 9855 if (sav == NULL)
9856 panic("key_sa_chgstate called with sav == NULL");
39236c6e 9857
1c79356b
A		 9858 if (sav->state == state)
9859 return;
39236c6e 9860
2d21ac55 9861 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_OWNED);
39236c6e 9862
1c79356b
A		 9863 if (__LIST_CHAINED(sav))
9864 LIST_REMOVE(sav, chain);
39236c6e 9865
1c79356b
A		 9866 sav->state = state;
9867 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
2d21ac55 9868
1c79356b
A		 9869}
9870
9bccf70c 9871void
6d2010ae 9872key_sa_stir_iv(
39236c6e 9873 struct secasvar *sav)
1c79356b 9874{
2d21ac55 9875 lck_mtx_lock(sadb_mutex);
9bccf70c
A		 9876 if (!sav->iv)
9877 panic("key_sa_stir_iv called with sav == NULL");
9878 key_randomfill(sav->iv, sav->ivlen);
2d21ac55 9879 lck_mtx_unlock(sadb_mutex);
1c79356b
A		 9880}
9881
9bccf70c
A		 9882/* XXX too much? */
9883static struct mbuf *
6d2010ae 9884key_alloc_mbuf(
39236c6e 9885 int l)
1c79356b 9886{
9bccf70c
A		 9887 struct mbuf *m = NULL, *n;
9888 int len, t;
39236c6e 9889
9bccf70c
A		 9890 len = l;
9891 while (len > 0) {
9892 MGET(n, M_DONTWAIT, MT_DATA);
9893 if (n && len > MLEN)
9894 MCLGET(n, M_DONTWAIT);
9895 if (!n) {
9896 m_freem(m);
9897 return NULL;
9898 }
39236c6e 9899
9bccf70c
A		 9900 n->m_next = NULL;
9901 n->m_len = 0;
9902 n->m_len = M_TRAILINGSPACE(n);
9903 /* use the bottom of mbuf, hoping we can prepend afterwards */
9904 if (n->m_len > len) {
9905 t = (n->m_len - len) & ~(sizeof(long) - 1);
9906 n->m_data += t;
9907 n->m_len = len;
9908 }
39236c6e 9909
9bccf70c 9910 len -= n->m_len;
39236c6e 9911
9bccf70c
A		 9912 if (m)
9913 m_cat(m, n);
9914 else
9915 m = n;
1c79356b 9916 }
39236c6e 9917
9bccf70c 9918 return m;
1c79356b 9919}
593a1d5f 9920
b0d623f7
A		 9921static struct mbuf *
9922key_setdumpsastats (u_int32_t dir,
39236c6e
A		 9923 struct sastat *stats,
9924 u_int32_t max_stats,
9925 u_int64_t session_ids[],
9926 u_int32_t seq,
9927 u_int32_t pid)
b0d623f7 9928{
39236c6e
A		 9929 struct mbuf *result = NULL, *m = NULL;
9930
9931 m = key_setsadbmsg(SADB_GETSASTAT, 0, 0, seq, pid, 0);
9932 if (!m) {
9933 goto fail;
b0d623f7 9934 }
39236c6e
A		 9935 result = m;
9936
b0d623f7
A		 9937 m = key_setsadbsession_id(session_ids);
9938 if (!m) {
39236c6e 9939 goto fail;
b0d623f7 9940 }
39236c6e
A		 9941 m_cat(result, m);
9942
b0d623f7 9943 m = key_setsadbsastat(dir,
39236c6e
A		 9944 stats,
9945 max_stats);
b0d623f7 9946 if (!m) {
39236c6e 9947 goto fail;
b0d623f7 9948 }
39236c6e
A		 9949 m_cat(result, m);
9950
9951 if ((result->m_flags & M_PKTHDR) == 0) {
b0d623f7 9952 goto fail;
39236c6e
A		 9953 }
9954
9955 if (result->m_len < sizeof(struct sadb_msg)) {
9956 result = m_pullup(result, sizeof(struct sadb_msg));
b0d623f7
A		 9957 if (result == NULL) {
9958 goto fail;
9959 }
593a1d5f 9960 }
39236c6e
A		 9961
9962 result->m_pkthdr.len = 0;
9963 for (m = result; m; m = m->m_next) {
9964 result->m_pkthdr.len += m->m_len;
9965 }
9966
9967 mtod(result, struct sadb_msg *)->sadb_msg_len =
9968 PFKEY_UNIT64(result->m_pkthdr.len);
9969
9970 return result;
9971
9972fail:
b0d623f7 9973 if (result) {
39236c6e 9974 m_freem(result);
593a1d5f 9975 }
39236c6e 9976 return NULL;
593a1d5f
A		 9977}
9978
9979/*
b0d623f7
A		 9980 * SADB_GETSASTAT processing
9981 * dump all stats for matching entries in SAD.
9982 *
9983 * m will always be freed.
593a1d5f 9984 */
39236c6e 9985
b0d623f7
A		 9986static int
9987key_getsastat (struct socket *so,
39236c6e
A		 9988 struct mbuf *m,
9989 const struct sadb_msghdr *mhp)
b0d623f7
A		 9990{
9991 struct sadb_session_id *session_id;
9992 u_int32_t bufsize, arg_count, res_count;
9993 struct sadb_sastat *sa_stats_arg;
9994 struct sastat *sa_stats_sav = NULL;
9995 struct mbuf *n;
9996 int error = 0;
39236c6e 9997
b0d623f7
A		 9998 /* sanity check */
9999 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
39236c6e
A		 10000 panic("%s: NULL pointer is passed.\n", __FUNCTION__);
10001
10002 if (mhp->ext[SADB_EXT_SESSION_ID] == NULL) {
10003 printf("%s: invalid message is passed. missing session-id.\n", __FUNCTION__);
b0d623f7 10004 return key_senderror(so, m, EINVAL);
39236c6e 10005 }
b0d623f7 10006 if (mhp->extlen[SADB_EXT_SESSION_ID] < sizeof(struct sadb_session_id)) {
39236c6e 10007 printf("%s: invalid message is passed. short session-id.\n", __FUNCTION__);
b0d623f7 10008 return key_senderror(so, m, EINVAL);
39236c6e 10009 }
b0d623f7 10010 if (mhp->ext[SADB_EXT_SASTAT] == NULL) {
39236c6e 10011 printf("%s: invalid message is passed. missing stat args.\n", __FUNCTION__);
b0d623f7 10012 return key_senderror(so, m, EINVAL);
39236c6e
A		 10013 }
10014 if (mhp->extlen[SADB_EXT_SASTAT] < sizeof(*sa_stats_arg)) {
10015 printf("%s: invalid message is passed. short stat args.\n", __FUNCTION__);
b0d623f7 10016 return key_senderror(so, m, EINVAL);
39236c6e
A		 10017 }
10018
b0d623f7 10019 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
39236c6e 10020
b0d623f7
A		 10021 // exit early if there are no active SAs
10022 if (ipsec_sav_count <= 0) {
39236c6e 10023 printf("%s: No active SAs.\n", __FUNCTION__);
b0d623f7
A		 10024 error = ENOENT;
10025 goto end;
593a1d5f 10026 }
b0d623f7 10027 bufsize = (ipsec_sav_count + 1) * sizeof(*sa_stats_sav);
39236c6e 10028
b0d623f7
A		 10029 KMALLOC_WAIT(sa_stats_sav, __typeof__(sa_stats_sav), bufsize);
10030 if (sa_stats_sav == NULL) {
39236c6e 10031 printf("%s: No more memory.\n", __FUNCTION__);
b0d623f7
A		 10032 error = ENOMEM;
10033 goto end;
593a1d5f 10034 }
b0d623f7 10035 bzero(sa_stats_sav, bufsize);
39236c6e
A		 10036
10037 sa_stats_arg = (__typeof__(sa_stats_arg))
10038 (void *)mhp->ext[SADB_EXT_SASTAT];
b0d623f7
A		 10039 arg_count = sa_stats_arg->sadb_sastat_list_len;
10040 // exit early if there are no requested SAs
10041 if (arg_count == 0) {
39236c6e 10042 printf("%s: No SAs requested.\n", __FUNCTION__);
b0d623f7
A		 10043 error = ENOENT;
10044 goto end;
593a1d5f 10045 }
b0d623f7 10046 res_count = 0;
39236c6e 10047
b0d623f7 10048 if (key_getsastatbyspi((struct sastat *)(sa_stats_arg + 1),
39236c6e
A		 10049 arg_count,
10050 sa_stats_sav,
10051 &res_count)) {
10052 printf("%s: Error finding SAs.\n", __FUNCTION__);
b0d623f7
A		 10053 error = ENOENT;
10054 goto end;
593a1d5f 10055 }
b0d623f7 10056 if (!res_count) {
39236c6e 10057 printf("%s: No SAs found.\n", __FUNCTION__);
b0d623f7
A		 10058 error = ENOENT;
10059 goto end;
593a1d5f 10060 }
39236c6e 10061
316670eb 10062 session_id = (__typeof__(session_id))
39236c6e
A		 10063 (void *)mhp->ext[SADB_EXT_SESSION_ID];
10064
b0d623f7
A		 10065 /* send this to the userland. */
10066 n = key_setdumpsastats(sa_stats_arg->sadb_sastat_dir,
39236c6e
A		 10067 sa_stats_sav,
10068 res_count,
10069 session_id->sadb_session_id_v,
10070 mhp->msg->sadb_msg_seq,
10071 mhp->msg->sadb_msg_pid);
10072 if (!n) {
10073 printf("%s: No bufs to dump stats.\n", __FUNCTION__);
b0d623f7
A		 10074 error = ENOBUFS;
10075 goto end;
593a1d5f 10076 }
39236c6e
A		 10077
10078 key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
b0d623f7
A		 10079end:
10080 if (sa_stats_sav) {
10081 KFREE(sa_stats_sav);
593a1d5f 10082 }
39236c6e 10083
b0d623f7
A		 10084 if (error)
10085 return key_senderror(so, m, error);
39236c6e 10086
b0d623f7 10087 m_freem(m);
593a1d5f
A		 10088 return 0;
10089}
10090
10091static void
b0d623f7 10092key_update_natt_keepalive_timestamp (struct secasvar *sav_sent,
39236c6e 10093 struct secasvar *sav_update)
593a1d5f 10094{
b0d623f7 10095 struct secasindex saidx_swap_sent_addr;
39236c6e 10096
b0d623f7
A		 10097 // exit early if two SAs are identical, or if sav_update is current
10098 if (sav_sent == sav_update ||
10099 sav_update->natt_last_activity == natt_now) {
10100 return;
10101 }
39236c6e 10102
b0d623f7 10103 // assuming that (sav_update->remote_ike_port != 0 && (esp_udp_encap_port & 0xFFFF) != 0)
39236c6e 10104
b0d623f7
A		 10105 bzero(&saidx_swap_sent_addr, sizeof(saidx_swap_sent_addr));
10106 memcpy(&saidx_swap_sent_addr.src, &sav_sent->sah->saidx.dst, sizeof(saidx_swap_sent_addr.src));
10107 memcpy(&saidx_swap_sent_addr.dst, &sav_sent->sah->saidx.src, sizeof(saidx_swap_sent_addr.dst));
10108 saidx_swap_sent_addr.proto = sav_sent->sah->saidx.proto;
10109 saidx_swap_sent_addr.mode = sav_sent->sah->saidx.mode;
10110 // we ignore reqid for split-tunnel setups
39236c6e 10111
b0d623f7
A		 10112 if (key_cmpsaidx(&sav_sent->sah->saidx, &sav_update->sah->saidx, CMP_MODE | CMP_PORT) ||
10113 key_cmpsaidx(&saidx_swap_sent_addr, &sav_update->sah->saidx, CMP_MODE | CMP_PORT)) {
10114 sav_update->natt_last_activity = natt_now;
593a1d5f 10115 }
593a1d5f 10116}
39236c6e
A		 10117
10118static int
10119key_send_delsp (struct secpolicy *sp)
10120{
10121 struct mbuf *result = NULL, *m;
10122
10123 if (sp == NULL)
10124 goto fail;
10125
10126 /* set msg header */
10127 m = key_setsadbmsg(SADB_X_SPDDELETE, 0, 0, 0, 0, 0);
10128 if (!m) {
10129 goto fail;
10130 }
10131 result = m;
10132
10133 /* set sadb_address(es) for source */
10134 if (sp->spidx.src_range.start.ss_len > 0) {
10135 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_SRC_START,
10136 (struct sockaddr *)&sp->spidx.src_range.start, sp->spidx.prefs,
10137 sp->spidx.ul_proto);
10138 if (!m)
10139 goto fail;
10140 m_cat(result, m);
10141
10142 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_SRC_END,
10143 (struct sockaddr *)&sp->spidx.src_range.end, sp->spidx.prefs,
10144 sp->spidx.ul_proto);
10145 if (!m)
10146 goto fail;
10147 m_cat(result, m);
10148 } else {
10149 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
10150 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
10151 sp->spidx.ul_proto);
10152 if (!m)
10153 goto fail;
10154 m_cat(result, m);
10155 }
10156
10157 /* set sadb_address(es) for destination */
10158 if (sp->spidx.dst_range.start.ss_len > 0) {
10159 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_DST_START,
10160 (struct sockaddr *)&sp->spidx.dst_range.start, sp->spidx.prefd,
10161 sp->spidx.ul_proto);
10162 if (!m)
10163 goto fail;
10164 m_cat(result, m);
10165
10166 m = key_setsadbaddr(SADB_X_EXT_ADDR_RANGE_DST_END,
10167 (struct sockaddr *)&sp->spidx.dst_range.end, sp->spidx.prefd,
10168 sp->spidx.ul_proto);
10169 if (!m)
10170 goto fail;
10171 m_cat(result, m);
10172 } else {
10173 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
10174 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
10175 sp->spidx.ul_proto);
10176 if (!m)
10177 goto fail;
10178 m_cat(result, m);
10179 }
10180
10181 /* set secpolicy */
10182 m = key_sp2msg(sp);
10183 if (!m) {
10184 goto fail;
10185 }
10186 m_cat(result, m);
10187
10188 if ((result->m_flags & M_PKTHDR) == 0) {
10189 goto fail;
10190 }
10191
10192 if (result->m_len < sizeof(struct sadb_msg)) {
10193 result = m_pullup(result, sizeof(struct sadb_msg));
10194 if (result == NULL) {
10195 goto fail;
10196 }
10197 }
10198
10199 result->m_pkthdr.len = 0;
10200 for (m = result; m; m = m->m_next)
10201 result->m_pkthdr.len += m->m_len;
10202
10203 mtod(result, struct sadb_msg *)->sadb_msg_len = PFKEY_UNIT64(result->m_pkthdr.len);
10204
10205 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
10206
10207fail:
10208 if (result)
10209 m_free(result);
10210 return -1;
10211}
10212
10213void
10214key_delsp_for_ipsec_if (ifnet_t ipsec_if)
10215{
fe8ab488
A		 10216 struct secashead *sah;
10217 struct secasvar *sav, *nextsav;
10218 u_int stateidx;
10219 u_int state;
39236c6e
A		 10220 struct secpolicy *sp, *nextsp;
10221 int dir;
10222
10223 if (ipsec_if == NULL)
10224 return;
10225
10226 lck_mtx_assert(sadb_mutex, LCK_MTX_ASSERT_NOTOWNED);
10227
10228 lck_mtx_lock(sadb_mutex);
10229
10230 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
10231 for (sp = LIST_FIRST(&sptree[dir]);
10232 sp != NULL;
10233 sp = nextsp) {
10234
10235 nextsp = LIST_NEXT(sp, chain);
10236
10237 if (sp->ipsec_if == ipsec_if) {
10238 ifnet_release(sp->ipsec_if);
10239 sp->ipsec_if = NULL;
10240
10241 key_send_delsp(sp);
10242
10243 sp->state = IPSEC_SPSTATE_DEAD;
10244 key_freesp(sp, KEY_SADB_LOCKED);
10245 }
10246 }
10247 }
10248
fe8ab488
A		 10249 LIST_FOREACH(sah, &sahtree, chain) {
10250 if (sah->ipsec_if == ipsec_if) {
10251 /* This SAH is linked to the IPSec interface. It now needs to close. */
10252 ifnet_release(sah->ipsec_if);
10253 sah->ipsec_if = NULL;
10254
10255 for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_alive); stateidx++) {
10256 state = saorder_state_any[stateidx];
10257 for (sav = LIST_FIRST(&sah->savtree[state]); sav != NULL; sav = nextsav) {
10258 nextsav = LIST_NEXT(sav, chain);
10259
10260 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
10261 key_freesav(sav, KEY_SADB_LOCKED);
10262 }
10263 }
10264
10265 sah->state = SADB_SASTATE_DEAD;
10266 }
10267 }
10268
39236c6e 10269 lck_mtx_unlock(sadb_mutex);
fe8ab488
A		 10270}
10271
10272__private_extern__ u_int32_t
10273key_fill_offload_frames_for_savs (ifnet_t ifp,
3e170ce0
A		 10274 struct ifnet_keepalive_offload_frame *frames_array,
10275 u_int32_t frames_array_count,
10276 size_t frame_data_offset)
fe8ab488
A		 10277{
10278 struct secashead *sah = NULL;
10279 struct secasvar *sav = NULL;
3e170ce0 10280 struct ifnet_keepalive_offload_frame *frame = frames_array;
fe8ab488
A		 10281 u_int32_t frame_index = 0;
10282
10283 if (frame == NULL || frames_array_count == 0) {
10284 return (frame_index);
10285 }
10286
10287 lck_mtx_lock(sadb_mutex);
10288 LIST_FOREACH(sah, &sahtree, chain) {
10289 LIST_FOREACH(sav, &sah->savtree[SADB_SASTATE_MATURE], chain) {
10290 if (ipsec_fill_offload_frame(ifp, sav, frame, frame_data_offset)) {
10291 frame_index++;
10292 if (frame_index >= frames_array_count) {
10293 lck_mtx_unlock(sadb_mutex);
10294 return (frame_index);
10295 }
10296 frame = &(frames_array[frame_index]);
10297 }
10298 }
10299 }
10300 lck_mtx_unlock(sadb_mutex);
10301
10302 return (frame_index);
39236c6e 10303}
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