2 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
5 * SPDX-License-Identifier: BSD-3-Clause
7 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * This code is referd to RFC 2367
40 #include "opt_inet6.h"
41 #include "opt_ipsec.h"
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/fnv_hash.h>
49 #include <sys/mutex.h>
51 #include <sys/domain.h>
52 #include <sys/protosw.h>
53 #include <sys/malloc.h>
54 #include <sys/rmlock.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/sysctl.h>
58 #include <sys/errno.h>
60 #include <sys/queue.h>
61 #include <sys/refcount.h>
62 #include <sys/syslog.h>
67 #include <net/if_var.h>
70 #include <netinet/in.h>
71 #include <netinet/in_systm.h>
72 #include <netinet/ip.h>
73 #include <netinet/in_var.h>
74 #include <netinet/udp.h>
77 #include <netinet/ip6.h>
78 #include <netinet6/in6_var.h>
79 #include <netinet6/ip6_var.h>
82 #include <net/pfkeyv2.h>
83 #include <netipsec/keydb.h>
84 #include <netipsec/key.h>
85 #include <netipsec/keysock.h>
86 #include <netipsec/key_debug.h>
88 #include <netipsec/ipsec.h>
90 #include <netipsec/ipsec6.h>
93 #include <netipsec/xform.h>
94 #include <machine/in_cksum.h>
95 #include <machine/stdarg.h>
98 #include <sys/random.h>
100 #define FULLMASK 0xff
101 #define _BITS(bytes) ((bytes) << 3)
103 #define UINT32_80PCT 0xcccccccc
105 * Note on SA reference counting:
106 * - SAs that are not in DEAD state will have (total external reference + 1)
107 * following value in reference count field. they cannot be freed and are
108 * referenced from SA header.
109 * - SAs that are in DEAD state will have (total external reference)
110 * in reference count field. they are ready to be freed. reference from
111 * SA header will be removed in key_delsav(), when the reference count
112 * field hits 0 (= no external reference other than from SA header.
115 VNET_DEFINE(u_int32_t, key_debug_level) = 0;
116 VNET_DEFINE_STATIC(u_int, key_spi_trycnt) = 1000;
117 VNET_DEFINE_STATIC(u_int32_t, key_spi_minval) = 0x100;
118 VNET_DEFINE_STATIC(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */
119 VNET_DEFINE_STATIC(u_int32_t, policy_id) = 0;
120 /*interval to initialize randseed,1(m)*/
121 VNET_DEFINE_STATIC(u_int, key_int_random) = 60;
122 /* interval to expire acquiring, 30(s)*/
123 VNET_DEFINE_STATIC(u_int, key_larval_lifetime) = 30;
124 /* counter for blocking SADB_ACQUIRE.*/
125 VNET_DEFINE_STATIC(int, key_blockacq_count) = 10;
126 /* lifetime for blocking SADB_ACQUIRE.*/
127 VNET_DEFINE_STATIC(int, key_blockacq_lifetime) = 20;
128 /* preferred old sa rather than new sa.*/
129 VNET_DEFINE_STATIC(int, key_preferred_oldsa) = 1;
130 #define V_key_spi_trycnt VNET(key_spi_trycnt)
131 #define V_key_spi_minval VNET(key_spi_minval)
132 #define V_key_spi_maxval VNET(key_spi_maxval)
133 #define V_policy_id VNET(policy_id)
134 #define V_key_int_random VNET(key_int_random)
135 #define V_key_larval_lifetime VNET(key_larval_lifetime)
136 #define V_key_blockacq_count VNET(key_blockacq_count)
137 #define V_key_blockacq_lifetime VNET(key_blockacq_lifetime)
138 #define V_key_preferred_oldsa VNET(key_preferred_oldsa)
140 VNET_DEFINE_STATIC(u_int32_t, acq_seq) = 0;
141 #define V_acq_seq VNET(acq_seq)
143 VNET_DEFINE_STATIC(uint32_t, sp_genid) = 0;
144 #define V_sp_genid VNET(sp_genid)
147 TAILQ_HEAD(secpolicy_queue, secpolicy);
148 LIST_HEAD(secpolicy_list, secpolicy);
149 VNET_DEFINE_STATIC(struct secpolicy_queue, sptree[IPSEC_DIR_MAX]);
150 VNET_DEFINE_STATIC(struct secpolicy_queue, sptree_ifnet[IPSEC_DIR_MAX]);
151 static struct rmlock sptree_lock;
152 #define V_sptree VNET(sptree)
153 #define V_sptree_ifnet VNET(sptree_ifnet)
154 #define SPTREE_LOCK_INIT() rm_init(&sptree_lock, "sptree")
155 #define SPTREE_LOCK_DESTROY() rm_destroy(&sptree_lock)
156 #define SPTREE_RLOCK_TRACKER struct rm_priotracker sptree_tracker
157 #define SPTREE_RLOCK() rm_rlock(&sptree_lock, &sptree_tracker)
158 #define SPTREE_RUNLOCK() rm_runlock(&sptree_lock, &sptree_tracker)
159 #define SPTREE_RLOCK_ASSERT() rm_assert(&sptree_lock, RA_RLOCKED)
160 #define SPTREE_WLOCK() rm_wlock(&sptree_lock)
161 #define SPTREE_WUNLOCK() rm_wunlock(&sptree_lock)
162 #define SPTREE_WLOCK_ASSERT() rm_assert(&sptree_lock, RA_WLOCKED)
163 #define SPTREE_UNLOCK_ASSERT() rm_assert(&sptree_lock, RA_UNLOCKED)
165 /* Hash table for lookup SP using unique id */
166 VNET_DEFINE_STATIC(struct secpolicy_list *, sphashtbl);
167 VNET_DEFINE_STATIC(u_long, sphash_mask);
168 #define V_sphashtbl VNET(sphashtbl)
169 #define V_sphash_mask VNET(sphash_mask)
171 #define SPHASH_NHASH_LOG2 7
172 #define SPHASH_NHASH (1 << SPHASH_NHASH_LOG2)
173 #define SPHASH_HASHVAL(id) (key_u32hash(id) & V_sphash_mask)
174 #define SPHASH_HASH(id) &V_sphashtbl[SPHASH_HASHVAL(id)]
177 struct spdcache_entry {
178 struct secpolicyindex spidx; /* secpolicyindex */
179 struct secpolicy *sp; /* cached policy to be used */
181 LIST_ENTRY(spdcache_entry) chain;
183 LIST_HEAD(spdcache_entry_list, spdcache_entry);
185 #define SPDCACHE_MAX_ENTRIES_PER_HASH 8
187 VNET_DEFINE_STATIC(u_int, key_spdcache_maxentries) = 0;
188 #define V_key_spdcache_maxentries VNET(key_spdcache_maxentries)
189 VNET_DEFINE_STATIC(u_int, key_spdcache_threshold) = 32;
190 #define V_key_spdcache_threshold VNET(key_spdcache_threshold)
191 VNET_DEFINE_STATIC(unsigned long, spd_size) = 0;
192 #define V_spd_size VNET(spd_size)
194 #define SPDCACHE_ENABLED() (V_key_spdcache_maxentries != 0)
195 #define SPDCACHE_ACTIVE() \
196 (SPDCACHE_ENABLED() && V_spd_size >= V_key_spdcache_threshold)
198 VNET_DEFINE_STATIC(struct spdcache_entry_list *, spdcachehashtbl);
199 VNET_DEFINE_STATIC(u_long, spdcachehash_mask);
200 #define V_spdcachehashtbl VNET(spdcachehashtbl)
201 #define V_spdcachehash_mask VNET(spdcachehash_mask)
203 #define SPDCACHE_HASHVAL(idx) \
204 (key_addrprotohash(&(idx)->src, &(idx)->dst, &(idx)->ul_proto) & \
207 /* Each cache line is protected by a mutex */
208 VNET_DEFINE_STATIC(struct mtx *, spdcache_lock);
209 #define V_spdcache_lock VNET(spdcache_lock)
211 #define SPDCACHE_LOCK_INIT(a) \
212 mtx_init(&V_spdcache_lock[a], "spdcache", \
213 "fast ipsec SPD cache", MTX_DEF|MTX_DUPOK)
214 #define SPDCACHE_LOCK_DESTROY(a) mtx_destroy(&V_spdcache_lock[a])
215 #define SPDCACHE_LOCK(a) mtx_lock(&V_spdcache_lock[a]);
216 #define SPDCACHE_UNLOCK(a) mtx_unlock(&V_spdcache_lock[a]);
218 static struct sx spi_alloc_lock;
219 #define SPI_ALLOC_LOCK_INIT() sx_init(&spi_alloc_lock, "spialloc")
220 #define SPI_ALLOC_LOCK_DESTROY() sx_destroy(&spi_alloc_lock)
221 #define SPI_ALLOC_LOCK() sx_xlock(&spi_alloc_lock)
222 #define SPI_ALLOC_UNLOCK() sx_unlock(&spi_alloc_lock)
223 #define SPI_ALLOC_LOCK_ASSERT() sx_assert(&spi_alloc_lock, SA_XLOCKED)
226 TAILQ_HEAD(secashead_queue, secashead);
227 LIST_HEAD(secashead_list, secashead);
228 VNET_DEFINE_STATIC(struct secashead_queue, sahtree);
229 static struct rmlock sahtree_lock;
230 #define V_sahtree VNET(sahtree)
231 #define SAHTREE_LOCK_INIT() rm_init(&sahtree_lock, "sahtree")
232 #define SAHTREE_LOCK_DESTROY() rm_destroy(&sahtree_lock)
233 #define SAHTREE_RLOCK_TRACKER struct rm_priotracker sahtree_tracker
234 #define SAHTREE_RLOCK() rm_rlock(&sahtree_lock, &sahtree_tracker)
235 #define SAHTREE_RUNLOCK() rm_runlock(&sahtree_lock, &sahtree_tracker)
236 #define SAHTREE_RLOCK_ASSERT() rm_assert(&sahtree_lock, RA_RLOCKED)
237 #define SAHTREE_WLOCK() rm_wlock(&sahtree_lock)
238 #define SAHTREE_WUNLOCK() rm_wunlock(&sahtree_lock)
239 #define SAHTREE_WLOCK_ASSERT() rm_assert(&sahtree_lock, RA_WLOCKED)
240 #define SAHTREE_UNLOCK_ASSERT() rm_assert(&sahtree_lock, RA_UNLOCKED)
242 /* Hash table for lookup in SAD using SA addresses */
243 VNET_DEFINE_STATIC(struct secashead_list *, sahaddrhashtbl);
244 VNET_DEFINE_STATIC(u_long, sahaddrhash_mask);
245 #define V_sahaddrhashtbl VNET(sahaddrhashtbl)
246 #define V_sahaddrhash_mask VNET(sahaddrhash_mask)
248 #define SAHHASH_NHASH_LOG2 7
249 #define SAHHASH_NHASH (1 << SAHHASH_NHASH_LOG2)
250 #define SAHADDRHASH_HASHVAL(idx) \
251 (key_addrprotohash(&(idx)->src, &(idx)->dst, &(idx)->proto) & \
253 #define SAHADDRHASH_HASH(saidx) \
254 &V_sahaddrhashtbl[SAHADDRHASH_HASHVAL(saidx)]
256 /* Hash table for lookup in SAD using SPI */
257 LIST_HEAD(secasvar_list, secasvar);
258 VNET_DEFINE_STATIC(struct secasvar_list *, savhashtbl);
259 VNET_DEFINE_STATIC(u_long, savhash_mask);
260 #define V_savhashtbl VNET(savhashtbl)
261 #define V_savhash_mask VNET(savhash_mask)
262 #define SAVHASH_NHASH_LOG2 7
263 #define SAVHASH_NHASH (1 << SAVHASH_NHASH_LOG2)
264 #define SAVHASH_HASHVAL(spi) (key_u32hash(spi) & V_savhash_mask)
265 #define SAVHASH_HASH(spi) &V_savhashtbl[SAVHASH_HASHVAL(spi)]
268 key_addrprotohash(const union sockaddr_union *src,
269 const union sockaddr_union *dst, const uint8_t *proto)
273 hval = fnv_32_buf(proto, sizeof(*proto),
275 switch (dst->sa.sa_family) {
278 hval = fnv_32_buf(&src->sin.sin_addr,
279 sizeof(in_addr_t), hval);
280 hval = fnv_32_buf(&dst->sin.sin_addr,
281 sizeof(in_addr_t), hval);
286 hval = fnv_32_buf(&src->sin6.sin6_addr,
287 sizeof(struct in6_addr), hval);
288 hval = fnv_32_buf(&dst->sin6.sin6_addr,
289 sizeof(struct in6_addr), hval);
294 ipseclog((LOG_DEBUG, "%s: unknown address family %d\n",
295 __func__, dst->sa.sa_family));
301 key_u32hash(uint32_t val)
304 return (fnv_32_buf(&val, sizeof(val), FNV1_32_INIT));
308 VNET_DEFINE_STATIC(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]);
309 #define V_regtree VNET(regtree)
310 static struct mtx regtree_lock;
311 #define REGTREE_LOCK_INIT() \
312 mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF)
313 #define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock)
314 #define REGTREE_LOCK() mtx_lock(®tree_lock)
315 #define REGTREE_UNLOCK() mtx_unlock(®tree_lock)
316 #define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED)
319 LIST_HEAD(secacq_list, secacq);
320 VNET_DEFINE_STATIC(struct secacq_list, acqtree);
321 #define V_acqtree VNET(acqtree)
322 static struct mtx acq_lock;
323 #define ACQ_LOCK_INIT() \
324 mtx_init(&acq_lock, "acqtree", "ipsec SA acquiring list", MTX_DEF)
325 #define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock)
326 #define ACQ_LOCK() mtx_lock(&acq_lock)
327 #define ACQ_UNLOCK() mtx_unlock(&acq_lock)
328 #define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED)
330 /* Hash table for lookup in ACQ list using SA addresses */
331 VNET_DEFINE_STATIC(struct secacq_list *, acqaddrhashtbl);
332 VNET_DEFINE_STATIC(u_long, acqaddrhash_mask);
333 #define V_acqaddrhashtbl VNET(acqaddrhashtbl)
334 #define V_acqaddrhash_mask VNET(acqaddrhash_mask)
336 /* Hash table for lookup in ACQ list using SEQ number */
337 VNET_DEFINE_STATIC(struct secacq_list *, acqseqhashtbl);
338 VNET_DEFINE_STATIC(u_long, acqseqhash_mask);
339 #define V_acqseqhashtbl VNET(acqseqhashtbl)
340 #define V_acqseqhash_mask VNET(acqseqhash_mask)
342 #define ACQHASH_NHASH_LOG2 7
343 #define ACQHASH_NHASH (1 << ACQHASH_NHASH_LOG2)
344 #define ACQADDRHASH_HASHVAL(idx) \
345 (key_addrprotohash(&(idx)->src, &(idx)->dst, &(idx)->proto) & \
347 #define ACQSEQHASH_HASHVAL(seq) \
348 (key_u32hash(seq) & V_acqseqhash_mask)
349 #define ACQADDRHASH_HASH(saidx) \
350 &V_acqaddrhashtbl[ACQADDRHASH_HASHVAL(saidx)]
351 #define ACQSEQHASH_HASH(seq) \
352 &V_acqseqhashtbl[ACQSEQHASH_HASHVAL(seq)]
353 /* SP acquiring list */
354 VNET_DEFINE_STATIC(LIST_HEAD(_spacqtree, secspacq), spacqtree);
355 #define V_spacqtree VNET(spacqtree)
356 static struct mtx spacq_lock;
357 #define SPACQ_LOCK_INIT() \
358 mtx_init(&spacq_lock, "spacqtree", \
359 "fast ipsec security policy acquire list", MTX_DEF)
360 #define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock)
361 #define SPACQ_LOCK() mtx_lock(&spacq_lock)
362 #define SPACQ_UNLOCK() mtx_unlock(&spacq_lock)
363 #define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED)
365 static const int minsize[] = {
366 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
367 sizeof(struct sadb_sa), /* SADB_EXT_SA */
368 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
369 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
370 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
371 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
372 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
373 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
374 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
375 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
376 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
377 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
378 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
379 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
380 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
381 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
382 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
383 0, /* SADB_X_EXT_KMPRIVATE */
384 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
385 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
386 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
387 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
388 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
389 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */
390 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */
391 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
392 sizeof(struct sadb_x_sa_replay), /* SADB_X_EXT_SA_REPLAY */
393 sizeof(struct sadb_address), /* SADB_X_EXT_NEW_ADDRESS_SRC */
394 sizeof(struct sadb_address), /* SADB_X_EXT_NEW_ADDRESS_DST */
396 _Static_assert(sizeof(minsize)/sizeof(int) == SADB_EXT_MAX + 1, "minsize size mismatch");
398 static const int maxsize[] = {
399 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
400 sizeof(struct sadb_sa), /* SADB_EXT_SA */
401 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
402 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
403 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
404 0, /* SADB_EXT_ADDRESS_SRC */
405 0, /* SADB_EXT_ADDRESS_DST */
406 0, /* SADB_EXT_ADDRESS_PROXY */
407 0, /* SADB_EXT_KEY_AUTH */
408 0, /* SADB_EXT_KEY_ENCRYPT */
409 0, /* SADB_EXT_IDENTITY_SRC */
410 0, /* SADB_EXT_IDENTITY_DST */
411 0, /* SADB_EXT_SENSITIVITY */
412 0, /* SADB_EXT_PROPOSAL */
413 0, /* SADB_EXT_SUPPORTED_AUTH */
414 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
415 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
416 0, /* SADB_X_EXT_KMPRIVATE */
417 0, /* SADB_X_EXT_POLICY */
418 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
419 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
420 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
421 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
422 0, /* SADB_X_EXT_NAT_T_OAI */
423 0, /* SADB_X_EXT_NAT_T_OAR */
424 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
425 sizeof(struct sadb_x_sa_replay), /* SADB_X_EXT_SA_REPLAY */
426 0, /* SADB_X_EXT_NEW_ADDRESS_SRC */
427 0, /* SADB_X_EXT_NEW_ADDRESS_DST */
429 _Static_assert(sizeof(maxsize)/sizeof(int) == SADB_EXT_MAX + 1, "minsize size mismatch");
432 * Internal values for SA flags:
433 * SADB_X_EXT_F_CLONED means that SA was cloned by key_updateaddresses,
434 * thus we will not free the most of SA content in key_delsav().
436 #define SADB_X_EXT_F_CLONED 0x80000000
438 #define SADB_CHECKLEN(_mhp, _ext) \
439 ((_mhp)->extlen[(_ext)] < minsize[(_ext)] || (maxsize[(_ext)] != 0 && \
440 ((_mhp)->extlen[(_ext)] > maxsize[(_ext)])))
441 #define SADB_CHECKHDR(_mhp, _ext) ((_mhp)->ext[(_ext)] == NULL)
443 VNET_DEFINE_STATIC(int, ipsec_esp_keymin) = 256;
444 VNET_DEFINE_STATIC(int, ipsec_esp_auth) = 0;
445 VNET_DEFINE_STATIC(int, ipsec_ah_keymin) = 128;
447 #define V_ipsec_esp_keymin VNET(ipsec_esp_keymin)
448 #define V_ipsec_esp_auth VNET(ipsec_esp_auth)
449 #define V_ipsec_ah_keymin VNET(ipsec_ah_keymin)
452 VNET_DEFINE(int, ipsec_debug) = 1;
454 VNET_DEFINE(int, ipsec_debug) = 0;
458 SYSCTL_DECL(_net_inet_ipsec);
459 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEBUG, debug,
460 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_debug), 0,
461 "Enable IPsec debugging output when set.");
464 SYSCTL_DECL(_net_inet6_ipsec6);
465 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEBUG, debug,
466 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_debug), 0,
467 "Enable IPsec debugging output when set.");
470 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug,
471 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, "");
473 /* max count of trial for the decision of spi value */
474 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt,
475 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, "");
477 /* minimum spi value to allocate automatically. */
478 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval,
479 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, "");
481 /* maximun spi value to allocate automatically. */
482 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval,
483 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, "");
485 /* interval to initialize randseed */
486 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random,
487 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_int_random), 0, "");
489 /* lifetime for larval SA */
490 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime,
491 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, "");
493 /* counter for blocking to send SADB_ACQUIRE to IKEd */
494 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count,
495 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, "");
497 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
498 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime,
499 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, "");
502 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth,
503 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, "");
505 /* minimum ESP key length */
506 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin,
507 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, "");
509 /* minimum AH key length */
510 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin,
511 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, "");
513 /* perfered old SA rather than new SA */
514 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, preferred_oldsa,
515 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, "");
517 SYSCTL_NODE(_net_key, OID_AUTO, spdcache, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
520 SYSCTL_UINT(_net_key_spdcache, OID_AUTO, maxentries,
521 CTLFLAG_VNET | CTLFLAG_RDTUN, &VNET_NAME(key_spdcache_maxentries), 0,
522 "Maximum number of entries in the SPD cache"
523 " (power of 2, 0 to disable)");
525 SYSCTL_UINT(_net_key_spdcache, OID_AUTO, threshold,
526 CTLFLAG_VNET | CTLFLAG_RDTUN, &VNET_NAME(key_spdcache_threshold), 0,
527 "Number of SPs that make the SPD cache active");
529 #define __LIST_CHAINED(elm) \
530 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
532 MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association");
533 MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head");
534 MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy");
535 MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request");
536 MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous");
537 MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire");
538 MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire");
539 MALLOC_DEFINE(M_IPSEC_SPDCACHE, "ipsec-spdcache", "ipsec SPD cache");
541 static uma_zone_t __read_mostly ipsec_key_lft_zone;
544 * set parameters into secpolicyindex buffer.
545 * Must allocate secpolicyindex buffer passed to this function.
547 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
549 bzero((idx), sizeof(struct secpolicyindex)); \
550 (idx)->dir = (_dir); \
551 (idx)->prefs = (ps); \
552 (idx)->prefd = (pd); \
553 (idx)->ul_proto = (ulp); \
554 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
555 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
559 * set parameters into secasindex buffer.
560 * Must allocate secasindex buffer before calling this function.
562 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
564 bzero((idx), sizeof(struct secasindex)); \
565 (idx)->proto = (p); \
567 (idx)->reqid = (r); \
568 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
569 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
570 key_porttosaddr(&(idx)->src.sa, 0); \
571 key_porttosaddr(&(idx)->dst.sa, 0); \
576 u_long getspi_count; /* the avarage of count to try to get new SPI */
580 struct sadb_msg *msg;
581 struct sadb_ext *ext[SADB_EXT_MAX + 1];
582 int extoff[SADB_EXT_MAX + 1];
583 int extlen[SADB_EXT_MAX + 1];
586 static struct supported_ealgs {
588 const struct enc_xform *xform;
589 } supported_ealgs[] = {
590 { SADB_X_EALG_AES, &enc_xform_aes_cbc },
591 { SADB_EALG_NULL, &enc_xform_null },
592 { SADB_X_EALG_AESCTR, &enc_xform_aes_icm },
593 { SADB_X_EALG_AESGCM16, &enc_xform_aes_nist_gcm },
594 { SADB_X_EALG_AESGMAC, &enc_xform_aes_nist_gmac },
597 static struct supported_aalgs {
599 const struct auth_hash *xform;
600 } supported_aalgs[] = {
601 { SADB_X_AALG_NULL, &auth_hash_null },
602 { SADB_AALG_SHA1HMAC, &auth_hash_hmac_sha1 },
603 { SADB_X_AALG_SHA2_256, &auth_hash_hmac_sha2_256 },
604 { SADB_X_AALG_SHA2_384, &auth_hash_hmac_sha2_384 },
605 { SADB_X_AALG_SHA2_512, &auth_hash_hmac_sha2_512 },
606 { SADB_X_AALG_AES128GMAC, &auth_hash_nist_gmac_aes_128 },
607 { SADB_X_AALG_AES192GMAC, &auth_hash_nist_gmac_aes_192 },
608 { SADB_X_AALG_AES256GMAC, &auth_hash_nist_gmac_aes_256 },
611 static struct supported_calgs {
613 const struct comp_algo *xform;
614 } supported_calgs[] = {
615 { SADB_X_CALG_DEFLATE, &comp_algo_deflate },
619 static struct callout key_timer;
622 static void key_unlink(struct secpolicy *);
623 static void key_detach(struct secpolicy *);
624 static struct secpolicy *key_do_allocsp(struct secpolicyindex *spidx, u_int dir);
625 static struct secpolicy *key_getsp(struct secpolicyindex *);
626 static struct secpolicy *key_getspbyid(u_int32_t);
627 static struct mbuf *key_gather_mbuf(struct mbuf *,
628 const struct sadb_msghdr *, int, int, ...);
629 static int key_spdadd(struct socket *, struct mbuf *,
630 const struct sadb_msghdr *);
631 static uint32_t key_getnewspid(void);
632 static int key_spddelete(struct socket *, struct mbuf *,
633 const struct sadb_msghdr *);
634 static int key_spddelete2(struct socket *, struct mbuf *,
635 const struct sadb_msghdr *);
636 static int key_spdget(struct socket *, struct mbuf *,
637 const struct sadb_msghdr *);
638 static int key_spdflush(struct socket *, struct mbuf *,
639 const struct sadb_msghdr *);
640 static int key_spddump(struct socket *, struct mbuf *,
641 const struct sadb_msghdr *);
642 static struct mbuf *key_setdumpsp(struct secpolicy *,
643 u_int8_t, u_int32_t, u_int32_t);
644 static struct mbuf *key_sp2mbuf(struct secpolicy *);
645 static size_t key_getspreqmsglen(struct secpolicy *);
646 static int key_spdexpire(struct secpolicy *);
647 static struct secashead *key_newsah(struct secasindex *);
648 static void key_freesah(struct secashead **);
649 static void key_delsah(struct secashead *);
650 static struct secasvar *key_newsav(const struct sadb_msghdr *,
651 struct secasindex *, uint32_t, int *);
652 static void key_delsav(struct secasvar *);
653 static void key_unlinksav(struct secasvar *);
654 static struct secashead *key_getsah(struct secasindex *);
655 static int key_checkspidup(uint32_t);
656 static struct secasvar *key_getsavbyspi(uint32_t);
657 static int key_setnatt(struct secasvar *, const struct sadb_msghdr *);
658 static int key_setsaval(struct secasvar *, const struct sadb_msghdr *);
659 static int key_updatelifetimes(struct secasvar *, const struct sadb_msghdr *);
660 static int key_updateaddresses(struct socket *, struct mbuf *,
661 const struct sadb_msghdr *, struct secasvar *, struct secasindex *);
663 static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t,
664 u_int8_t, u_int32_t, u_int32_t);
665 static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t,
666 u_int32_t, pid_t, u_int16_t);
667 static struct mbuf *key_setsadbsa(struct secasvar *);
668 static struct mbuf *key_setsadbaddr(u_int16_t,
669 const struct sockaddr *, u_int8_t, u_int16_t);
670 static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t);
671 static struct mbuf *key_setsadbxtype(u_int16_t);
672 static struct mbuf *key_setsadbxsa2(u_int8_t, u_int32_t, u_int32_t);
673 static struct mbuf *key_setsadbxsareplay(u_int32_t);
674 static struct mbuf *key_setsadbxpolicy(u_int16_t, u_int8_t,
675 u_int32_t, u_int32_t);
676 static struct seckey *key_dup_keymsg(const struct sadb_key *, size_t,
677 struct malloc_type *);
678 static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src,
679 struct malloc_type *);
681 /* flags for key_cmpsaidx() */
682 #define CMP_HEAD 1 /* protocol, addresses. */
683 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
684 #define CMP_REQID 3 /* additionally HEAD, reaid. */
685 #define CMP_EXACTLY 4 /* all elements. */
686 static int key_cmpsaidx(const struct secasindex *,
687 const struct secasindex *, int);
688 static int key_cmpspidx_exactly(struct secpolicyindex *,
689 struct secpolicyindex *);
690 static int key_cmpspidx_withmask(struct secpolicyindex *,
691 struct secpolicyindex *);
692 static int key_bbcmp(const void *, const void *, u_int);
693 static uint8_t key_satype2proto(uint8_t);
694 static uint8_t key_proto2satype(uint8_t);
696 static int key_getspi(struct socket *, struct mbuf *,
697 const struct sadb_msghdr *);
698 static uint32_t key_do_getnewspi(struct sadb_spirange *, struct secasindex *);
699 static int key_update(struct socket *, struct mbuf *,
700 const struct sadb_msghdr *);
701 static int key_add(struct socket *, struct mbuf *,
702 const struct sadb_msghdr *);
703 static int key_setident(struct secashead *, const struct sadb_msghdr *);
704 static struct mbuf *key_getmsgbuf_x1(struct mbuf *,
705 const struct sadb_msghdr *);
706 static int key_delete(struct socket *, struct mbuf *,
707 const struct sadb_msghdr *);
708 static int key_delete_all(struct socket *, struct mbuf *,
709 const struct sadb_msghdr *, struct secasindex *);
710 static int key_get(struct socket *, struct mbuf *,
711 const struct sadb_msghdr *);
713 static void key_getcomb_setlifetime(struct sadb_comb *);
714 static struct mbuf *key_getcomb_ealg(void);
715 static struct mbuf *key_getcomb_ah(void);
716 static struct mbuf *key_getcomb_ipcomp(void);
717 static struct mbuf *key_getprop(const struct secasindex *);
719 static int key_acquire(const struct secasindex *, struct secpolicy *);
720 static uint32_t key_newacq(const struct secasindex *, int *);
721 static uint32_t key_getacq(const struct secasindex *, int *);
722 static int key_acqdone(const struct secasindex *, uint32_t);
723 static int key_acqreset(uint32_t);
724 static struct secspacq *key_newspacq(struct secpolicyindex *);
725 static struct secspacq *key_getspacq(struct secpolicyindex *);
726 static int key_acquire2(struct socket *, struct mbuf *,
727 const struct sadb_msghdr *);
728 static int key_register(struct socket *, struct mbuf *,
729 const struct sadb_msghdr *);
730 static int key_expire(struct secasvar *, int);
731 static int key_flush(struct socket *, struct mbuf *,
732 const struct sadb_msghdr *);
733 static int key_dump(struct socket *, struct mbuf *,
734 const struct sadb_msghdr *);
735 static int key_promisc(struct socket *, struct mbuf *,
736 const struct sadb_msghdr *);
737 static int key_senderror(struct socket *, struct mbuf *, int);
738 static int key_validate_ext(const struct sadb_ext *, int);
739 static int key_align(struct mbuf *, struct sadb_msghdr *);
740 static struct mbuf *key_setlifetime(struct seclifetime *, uint16_t);
741 static struct mbuf *key_setkey(struct seckey *, uint16_t);
743 static void spdcache_init(void);
744 static void spdcache_clear(void);
745 static struct spdcache_entry *spdcache_entry_alloc(
746 const struct secpolicyindex *spidx,
747 struct secpolicy *policy);
748 static void spdcache_entry_free(struct spdcache_entry *entry);
750 static void spdcache_destroy(void);
753 #define DBG_IPSEC_INITREF(t, p) do { \
754 refcount_init(&(p)->refcnt, 1); \
756 printf("%s: Initialize refcnt %s(%p) = %u\n", \
757 __func__, #t, (p), (p)->refcnt)); \
759 #define DBG_IPSEC_ADDREF(t, p) do { \
760 refcount_acquire(&(p)->refcnt); \
762 printf("%s: Acquire refcnt %s(%p) -> %u\n", \
763 __func__, #t, (p), (p)->refcnt)); \
765 #define DBG_IPSEC_DELREF(t, p) do { \
767 printf("%s: Release refcnt %s(%p) -> %u\n", \
768 __func__, #t, (p), (p)->refcnt - 1)); \
769 refcount_release(&(p)->refcnt); \
772 #define IPSEC_INITREF(t, p) refcount_init(&(p)->refcnt, 1)
773 #define IPSEC_ADDREF(t, p) refcount_acquire(&(p)->refcnt)
774 #define IPSEC_DELREF(t, p) refcount_release(&(p)->refcnt)
776 #define SP_INITREF(p) IPSEC_INITREF(SP, p)
777 #define SP_ADDREF(p) IPSEC_ADDREF(SP, p)
778 #define SP_DELREF(p) IPSEC_DELREF(SP, p)
780 #define SAH_INITREF(p) IPSEC_INITREF(SAH, p)
781 #define SAH_ADDREF(p) IPSEC_ADDREF(SAH, p)
782 #define SAH_DELREF(p) IPSEC_DELREF(SAH, p)
784 #define SAV_INITREF(p) IPSEC_INITREF(SAV, p)
785 #define SAV_ADDREF(p) IPSEC_ADDREF(SAV, p)
786 #define SAV_DELREF(p) IPSEC_DELREF(SAV, p)
789 * Update the refcnt while holding the SPTREE lock.
792 key_addref(struct secpolicy *sp)
799 * Return 0 when there are known to be no SP's for the specified
800 * direction. Otherwise return 1. This is used by IPsec code
801 * to optimize performance.
804 key_havesp(u_int dir)
807 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
808 TAILQ_FIRST(&V_sptree[dir]) != NULL : 1);
811 /* %%% IPsec policy management */
813 * Return current SPDB generation.
830 key_checksockaddrs(struct sockaddr *src, struct sockaddr *dst)
834 if (src->sa_family != dst->sa_family)
837 if (src->sa_len != dst->sa_len)
839 switch (src->sa_family) {
842 if (src->sa_len != sizeof(struct sockaddr_in))
848 if (src->sa_len != sizeof(struct sockaddr_in6))
853 return (EAFNOSUPPORT);
859 key_do_allocsp(struct secpolicyindex *spidx, u_int dir)
861 SPTREE_RLOCK_TRACKER;
862 struct secpolicy *sp;
864 IPSEC_ASSERT(spidx != NULL, ("null spidx"));
865 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
866 ("invalid direction %u", dir));
869 TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
870 if (key_cmpspidx_withmask(&sp->spidx, spidx)) {
880 * allocating a SP for OUTBOUND or INBOUND packet.
881 * Must call key_freesp() later.
882 * OUT: NULL: not found
883 * others: found and return the pointer.
886 key_allocsp(struct secpolicyindex *spidx, u_int dir)
888 struct spdcache_entry *entry, *lastentry, *tmpentry;
889 struct secpolicy *sp;
893 if (!SPDCACHE_ACTIVE()) {
894 sp = key_do_allocsp(spidx, dir);
898 hashv = SPDCACHE_HASHVAL(spidx);
899 SPDCACHE_LOCK(hashv);
901 LIST_FOREACH_SAFE(entry, &V_spdcachehashtbl[hashv], chain, tmpentry) {
902 /* Removed outdated entries */
903 if (entry->sp != NULL &&
904 entry->sp->state == IPSEC_SPSTATE_DEAD) {
905 LIST_REMOVE(entry, chain);
906 spdcache_entry_free(entry);
911 if (!key_cmpspidx_exactly(&entry->spidx, spidx)) {
917 if (entry->sp != NULL)
920 /* IPSECSTAT_INC(ips_spdcache_hits); */
922 SPDCACHE_UNLOCK(hashv);
926 /* IPSECSTAT_INC(ips_spdcache_misses); */
928 sp = key_do_allocsp(spidx, dir);
929 entry = spdcache_entry_alloc(spidx, sp);
931 if (nb_entries >= SPDCACHE_MAX_ENTRIES_PER_HASH) {
932 LIST_REMOVE(lastentry, chain);
933 spdcache_entry_free(lastentry);
936 LIST_INSERT_HEAD(&V_spdcachehashtbl[hashv], entry, chain);
939 SPDCACHE_UNLOCK(hashv);
942 if (sp != NULL) { /* found a SPD entry */
943 sp->lastused = time_second;
945 printf("%s: return SP(%p)\n", __func__, sp));
946 KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp));
949 printf("%s: lookup failed for ", __func__);
950 kdebug_secpolicyindex(spidx, NULL));
956 * Allocating an SA entry for an *INBOUND* or *OUTBOUND* TCP packet, signed
957 * or should be signed by MD5 signature.
958 * We don't use key_allocsa() for such lookups, because we don't know SPI.
959 * Unlike ESP and AH protocols, SPI isn't transmitted in the TCP header with
960 * signed packet. We use SADB only as storage for password.
961 * OUT: positive: corresponding SA for given saidx found.
965 key_allocsa_tcpmd5(struct secasindex *saidx)
967 SAHTREE_RLOCK_TRACKER;
968 struct secashead *sah;
969 struct secasvar *sav;
971 IPSEC_ASSERT(saidx->proto == IPPROTO_TCP,
972 ("unexpected security protocol %u", saidx->proto));
973 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TCPMD5,
974 ("unexpected mode %u", saidx->mode));
977 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
979 printf("%s: checking SAH\n", __func__);
980 kdebug_secash(sah, " "));
981 if (sah->saidx.proto != IPPROTO_TCP)
983 if (!key_sockaddrcmp(&saidx->dst.sa, &sah->saidx.dst.sa, 0) &&
984 !key_sockaddrcmp(&saidx->src.sa, &sah->saidx.src.sa, 0))
988 if (V_key_preferred_oldsa)
989 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
991 sav = TAILQ_FIRST(&sah->savtree_alive);
1000 printf("%s: return SA(%p)\n", __func__, sav));
1001 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
1004 printf("%s: SA not found\n", __func__));
1005 KEYDBG(IPSEC_DATA, kdebug_secasindex(saidx, NULL));
1011 * Allocating an SA entry for an *OUTBOUND* packet.
1012 * OUT: positive: corresponding SA for given saidx found.
1013 * NULL: SA not found, but will be acquired, check *error
1014 * for acquiring status.
1017 key_allocsa_policy(struct secpolicy *sp, const struct secasindex *saidx,
1020 SAHTREE_RLOCK_TRACKER;
1021 struct secashead *sah;
1022 struct secasvar *sav;
1024 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
1025 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
1026 saidx->mode == IPSEC_MODE_TUNNEL,
1027 ("unexpected policy %u", saidx->mode));
1030 * We check new SA in the IPsec request because a different
1031 * SA may be involved each time this request is checked, either
1032 * because new SAs are being configured, or this request is
1033 * associated with an unconnected datagram socket, or this request
1034 * is associated with a system default policy.
1037 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
1039 printf("%s: checking SAH\n", __func__);
1040 kdebug_secash(sah, " "));
1041 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
1046 * Allocate the oldest SA available according to
1047 * draft-jenkins-ipsec-rekeying-03.
1049 if (V_key_preferred_oldsa)
1050 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
1052 sav = TAILQ_FIRST(&sah->savtree_alive);
1062 printf("%s: chosen SA(%p) for SP(%p)\n", __func__,
1064 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
1065 return (sav); /* return referenced SA */
1068 /* there is no SA */
1069 *error = key_acquire(saidx, sp);
1071 ipseclog((LOG_DEBUG,
1072 "%s: error %d returned from key_acquire()\n",
1075 printf("%s: acquire SA for SP(%p), error %d\n",
1076 __func__, sp, *error));
1077 KEYDBG(IPSEC_DATA, kdebug_secasindex(saidx, NULL));
1082 * allocating a usable SA entry for a *INBOUND* packet.
1083 * Must call key_freesav() later.
1084 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
1085 * NULL: not found, or error occurred.
1087 * According to RFC 2401 SA is uniquely identified by a triple SPI,
1088 * destination address, and security protocol. But according to RFC 4301,
1089 * SPI by itself suffices to specify an SA.
1091 * Note that, however, we do need to keep source address in IPsec SA.
1092 * IKE specification and PF_KEY specification do assume that we
1093 * keep source address in IPsec SA. We see a tricky situation here.
1096 key_allocsa(union sockaddr_union *dst, uint8_t proto, uint32_t spi)
1098 SAHTREE_RLOCK_TRACKER;
1099 struct secasvar *sav;
1101 IPSEC_ASSERT(proto == IPPROTO_ESP || proto == IPPROTO_AH ||
1102 proto == IPPROTO_IPCOMP, ("unexpected security protocol %u",
1106 LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) {
1107 if (sav->spi == spi)
1111 * We use single SPI namespace for all protocols, so it is
1112 * impossible to have SPI duplicates in the SAVHASH.
1115 if (sav->state != SADB_SASTATE_LARVAL &&
1116 sav->sah->saidx.proto == proto &&
1117 key_sockaddrcmp(&dst->sa,
1118 &sav->sah->saidx.dst.sa, 0) == 0)
1127 char buf[IPSEC_ADDRSTRLEN];
1128 printf("%s: SA not found for spi %u proto %u dst %s\n",
1129 __func__, ntohl(spi), proto, ipsec_address(dst, buf,
1133 printf("%s: return SA(%p)\n", __func__, sav));
1134 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
1140 key_allocsa_tunnel(union sockaddr_union *src, union sockaddr_union *dst,
1143 SAHTREE_RLOCK_TRACKER;
1144 struct secasindex saidx;
1145 struct secashead *sah;
1146 struct secasvar *sav;
1148 IPSEC_ASSERT(src != NULL, ("null src address"));
1149 IPSEC_ASSERT(dst != NULL, ("null dst address"));
1151 KEY_SETSECASIDX(proto, IPSEC_MODE_TUNNEL, 0, &src->sa,
1156 LIST_FOREACH(sah, SAHADDRHASH_HASH(&saidx), addrhash) {
1157 if (IPSEC_MODE_TUNNEL != sah->saidx.mode)
1159 if (proto != sah->saidx.proto)
1161 if (key_sockaddrcmp(&src->sa, &sah->saidx.src.sa, 0) != 0)
1163 if (key_sockaddrcmp(&dst->sa, &sah->saidx.dst.sa, 0) != 0)
1165 /* XXXAE: is key_preferred_oldsa reasonably?*/
1166 if (V_key_preferred_oldsa)
1167 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
1169 sav = TAILQ_FIRST(&sah->savtree_alive);
1177 printf("%s: return SA(%p)\n", __func__, sav));
1179 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
1184 * Must be called after calling key_allocsp().
1187 key_freesp(struct secpolicy **spp)
1189 struct secpolicy *sp = *spp;
1191 IPSEC_ASSERT(sp != NULL, ("null sp"));
1192 if (SP_DELREF(sp) == 0)
1196 printf("%s: last reference to SP(%p)\n", __func__, sp));
1197 KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp));
1200 while (sp->tcount > 0)
1201 ipsec_delisr(sp->req[--sp->tcount]);
1202 free(sp, M_IPSEC_SP);
1206 key_unlink(struct secpolicy *sp)
1211 if (SPDCACHE_ENABLED())
1217 key_detach(struct secpolicy *sp)
1219 IPSEC_ASSERT(sp->spidx.dir == IPSEC_DIR_INBOUND ||
1220 sp->spidx.dir == IPSEC_DIR_OUTBOUND,
1221 ("invalid direction %u", sp->spidx.dir));
1222 SPTREE_WLOCK_ASSERT();
1225 printf("%s: SP(%p)\n", __func__, sp));
1226 if (sp->state != IPSEC_SPSTATE_ALIVE) {
1227 /* SP is already unlinked */
1230 sp->state = IPSEC_SPSTATE_DEAD;
1231 TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain);
1233 LIST_REMOVE(sp, idhash);
1238 * insert a secpolicy into the SP database. Lower priorities first
1241 key_insertsp(struct secpolicy *newsp)
1243 struct secpolicy *sp;
1245 SPTREE_WLOCK_ASSERT();
1246 TAILQ_FOREACH(sp, &V_sptree[newsp->spidx.dir], chain) {
1247 if (newsp->priority < sp->priority) {
1248 TAILQ_INSERT_BEFORE(sp, newsp, chain);
1252 TAILQ_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, chain);
1254 LIST_INSERT_HEAD(SPHASH_HASH(newsp->id), newsp, idhash);
1255 newsp->state = IPSEC_SPSTATE_ALIVE;
1261 * Insert a bunch of VTI secpolicies into the SPDB.
1262 * We keep VTI policies in the separate list due to following reasons:
1263 * 1) they should be immutable to user's or some deamon's attempts to
1264 * delete. The only way delete such policies - destroy or unconfigure
1265 * corresponding virtual inteface.
1266 * 2) such policies have traffic selector that matches all traffic per
1268 * Since all VTI policies have the same priority, we don't care about
1272 key_register_ifnet(struct secpolicy **spp, u_int count)
1279 * First of try to acquire id for each SP.
1281 for (i = 0; i < count; i++) {
1282 IPSEC_ASSERT(spp[i]->spidx.dir == IPSEC_DIR_INBOUND ||
1283 spp[i]->spidx.dir == IPSEC_DIR_OUTBOUND,
1284 ("invalid direction %u", spp[i]->spidx.dir));
1286 if ((spp[i]->id = key_getnewspid()) == 0) {
1291 for (i = 0; i < count; i++) {
1292 TAILQ_INSERT_TAIL(&V_sptree_ifnet[spp[i]->spidx.dir],
1295 * NOTE: despite the fact that we keep VTI SP in the
1296 * separate list, SPHASH contains policies from both
1297 * sources. Thus SADB_X_SPDGET will correctly return
1298 * SP by id, because it uses SPHASH for lookups.
1300 LIST_INSERT_HEAD(SPHASH_HASH(spp[i]->id), spp[i], idhash);
1301 spp[i]->state = IPSEC_SPSTATE_IFNET;
1305 * Notify user processes about new SP.
1307 for (i = 0; i < count; i++) {
1308 m = key_setdumpsp(spp[i], SADB_X_SPDADD, 0, 0);
1310 key_sendup_mbuf(NULL, m, KEY_SENDUP_ALL);
1316 key_unregister_ifnet(struct secpolicy **spp, u_int count)
1322 for (i = 0; i < count; i++) {
1323 IPSEC_ASSERT(spp[i]->spidx.dir == IPSEC_DIR_INBOUND ||
1324 spp[i]->spidx.dir == IPSEC_DIR_OUTBOUND,
1325 ("invalid direction %u", spp[i]->spidx.dir));
1327 if (spp[i]->state != IPSEC_SPSTATE_IFNET)
1329 spp[i]->state = IPSEC_SPSTATE_DEAD;
1330 TAILQ_REMOVE(&V_sptree_ifnet[spp[i]->spidx.dir],
1333 LIST_REMOVE(spp[i], idhash);
1336 if (SPDCACHE_ENABLED())
1339 for (i = 0; i < count; i++) {
1340 m = key_setdumpsp(spp[i], SADB_X_SPDDELETE, 0, 0);
1342 key_sendup_mbuf(NULL, m, KEY_SENDUP_ALL);
1347 * Must be called after calling key_allocsa().
1348 * This function is called by key_freesp() to free some SA allocated
1352 key_freesav(struct secasvar **psav)
1354 struct secasvar *sav = *psav;
1356 IPSEC_ASSERT(sav != NULL, ("null sav"));
1357 CURVNET_ASSERT_SET();
1358 if (SAV_DELREF(sav) == 0)
1362 printf("%s: last reference to SA(%p)\n", __func__, sav));
1369 * Unlink SA from SAH and SPI hash under SAHTREE_WLOCK.
1370 * Expect that SA has extra reference due to lookup.
1371 * Release this references, also release SAH reference after unlink.
1374 key_unlinksav(struct secasvar *sav)
1376 struct secashead *sah;
1379 printf("%s: SA(%p)\n", __func__, sav));
1381 CURVNET_ASSERT_SET();
1382 SAHTREE_UNLOCK_ASSERT();
1384 if (sav->state == SADB_SASTATE_DEAD) {
1385 /* SA is already unlinked */
1389 /* Unlink from SAH */
1390 if (sav->state == SADB_SASTATE_LARVAL)
1391 TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain);
1393 TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain);
1394 /* Unlink from SPI hash */
1395 LIST_REMOVE(sav, spihash);
1396 sav->state = SADB_SASTATE_DEAD;
1400 /* Since we are unlinked, release reference to SAH */
1404 /* %%% SPD management */
1407 * OUT: NULL : not found
1408 * others : found, pointer to a SP.
1410 static struct secpolicy *
1411 key_getsp(struct secpolicyindex *spidx)
1413 SPTREE_RLOCK_TRACKER;
1414 struct secpolicy *sp;
1416 IPSEC_ASSERT(spidx != NULL, ("null spidx"));
1419 TAILQ_FOREACH(sp, &V_sptree[spidx->dir], chain) {
1420 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1432 * OUT: NULL : not found
1433 * others : found, pointer to referenced SP.
1435 static struct secpolicy *
1436 key_getspbyid(uint32_t id)
1438 SPTREE_RLOCK_TRACKER;
1439 struct secpolicy *sp;
1442 LIST_FOREACH(sp, SPHASH_HASH(id), idhash) {
1455 struct secpolicy *sp;
1457 sp = malloc(sizeof(*sp), M_IPSEC_SP, M_NOWAIT | M_ZERO);
1463 struct ipsecrequest *
1467 return (malloc(sizeof(struct ipsecrequest), M_IPSEC_SR,
1468 M_NOWAIT | M_ZERO));
1472 ipsec_delisr(struct ipsecrequest *p)
1475 free(p, M_IPSEC_SR);
1479 * create secpolicy structure from sadb_x_policy structure.
1480 * NOTE: `state', `secpolicyindex' and 'id' in secpolicy structure
1481 * are not set, so must be set properly later.
1484 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1486 struct secpolicy *newsp;
1488 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0"));
1489 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len));
1491 if (len != PFKEY_EXTLEN(xpl0)) {
1492 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__));
1497 if ((newsp = key_newsp()) == NULL) {
1502 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1503 newsp->policy = xpl0->sadb_x_policy_type;
1504 newsp->priority = xpl0->sadb_x_policy_priority;
1508 switch (xpl0->sadb_x_policy_type) {
1509 case IPSEC_POLICY_DISCARD:
1510 case IPSEC_POLICY_NONE:
1511 case IPSEC_POLICY_ENTRUST:
1512 case IPSEC_POLICY_BYPASS:
1515 case IPSEC_POLICY_IPSEC:
1517 struct sadb_x_ipsecrequest *xisr;
1518 struct ipsecrequest *isr;
1521 /* validity check */
1522 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1523 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n",
1530 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1531 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1535 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr) ||
1536 xisr->sadb_x_ipsecrequest_len > tlen) {
1537 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest "
1538 "length.\n", __func__));
1544 if (newsp->tcount >= IPSEC_MAXREQ) {
1545 ipseclog((LOG_DEBUG,
1546 "%s: too many ipsecrequests.\n",
1553 /* allocate request buffer */
1554 /* NB: data structure is zero'd */
1555 isr = ipsec_newisr();
1557 ipseclog((LOG_DEBUG,
1558 "%s: No more memory.\n", __func__));
1564 newsp->req[newsp->tcount++] = isr;
1567 switch (xisr->sadb_x_ipsecrequest_proto) {
1570 case IPPROTO_IPCOMP:
1573 ipseclog((LOG_DEBUG,
1574 "%s: invalid proto type=%u\n", __func__,
1575 xisr->sadb_x_ipsecrequest_proto));
1577 *error = EPROTONOSUPPORT;
1581 (uint8_t)xisr->sadb_x_ipsecrequest_proto;
1583 switch (xisr->sadb_x_ipsecrequest_mode) {
1584 case IPSEC_MODE_TRANSPORT:
1585 case IPSEC_MODE_TUNNEL:
1587 case IPSEC_MODE_ANY:
1589 ipseclog((LOG_DEBUG,
1590 "%s: invalid mode=%u\n", __func__,
1591 xisr->sadb_x_ipsecrequest_mode));
1596 isr->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1598 switch (xisr->sadb_x_ipsecrequest_level) {
1599 case IPSEC_LEVEL_DEFAULT:
1600 case IPSEC_LEVEL_USE:
1601 case IPSEC_LEVEL_REQUIRE:
1603 case IPSEC_LEVEL_UNIQUE:
1604 /* validity check */
1606 * If range violation of reqid, kernel will
1607 * update it, don't refuse it.
1609 if (xisr->sadb_x_ipsecrequest_reqid
1610 > IPSEC_MANUAL_REQID_MAX) {
1611 ipseclog((LOG_DEBUG,
1612 "%s: reqid=%d range "
1613 "violation, updated by kernel.\n",
1615 xisr->sadb_x_ipsecrequest_reqid));
1616 xisr->sadb_x_ipsecrequest_reqid = 0;
1619 /* allocate new reqid id if reqid is zero. */
1620 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1622 if ((reqid = key_newreqid()) == 0) {
1627 isr->saidx.reqid = reqid;
1628 xisr->sadb_x_ipsecrequest_reqid = reqid;
1630 /* set it for manual keying. */
1632 xisr->sadb_x_ipsecrequest_reqid;
1637 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n",
1639 xisr->sadb_x_ipsecrequest_level));
1644 isr->level = xisr->sadb_x_ipsecrequest_level;
1646 /* set IP addresses if there */
1647 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1648 struct sockaddr *paddr;
1650 len = tlen - sizeof(*xisr);
1651 paddr = (struct sockaddr *)(xisr + 1);
1652 /* validity check */
1653 if (len < sizeof(struct sockaddr) ||
1654 len < 2 * paddr->sa_len ||
1655 paddr->sa_len > sizeof(isr->saidx.src)) {
1656 ipseclog((LOG_DEBUG, "%s: invalid "
1657 "request address length.\n",
1664 * Request length should be enough to keep
1665 * source and destination addresses.
1667 if (xisr->sadb_x_ipsecrequest_len <
1668 sizeof(*xisr) + 2 * paddr->sa_len) {
1669 ipseclog((LOG_DEBUG, "%s: invalid "
1670 "ipsecrequest length.\n",
1676 bcopy(paddr, &isr->saidx.src, paddr->sa_len);
1677 paddr = (struct sockaddr *)((caddr_t)paddr +
1680 /* validity check */
1681 if (paddr->sa_len !=
1682 isr->saidx.src.sa.sa_len) {
1683 ipseclog((LOG_DEBUG, "%s: invalid "
1684 "request address length.\n",
1690 /* AF family should match */
1691 if (paddr->sa_family !=
1692 isr->saidx.src.sa.sa_family) {
1693 ipseclog((LOG_DEBUG, "%s: address "
1694 "family doesn't match.\n",
1700 bcopy(paddr, &isr->saidx.dst, paddr->sa_len);
1703 * Addresses for TUNNEL mode requests are
1706 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) {
1707 ipseclog((LOG_DEBUG, "%s: missing "
1708 "request addresses.\n", __func__));
1714 tlen -= xisr->sadb_x_ipsecrequest_len;
1716 /* validity check */
1718 ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n",
1725 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1726 + xisr->sadb_x_ipsecrequest_len);
1728 /* XXXAE: LARVAL SP */
1729 if (newsp->tcount < 1) {
1730 ipseclog((LOG_DEBUG, "%s: valid IPSEC transforms "
1731 "not found.\n", __func__));
1739 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
1752 static uint32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1754 if (auto_reqid == ~0)
1755 auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1759 /* XXX should be unique check */
1760 return (auto_reqid);
1764 * copy secpolicy struct to sadb_x_policy structure indicated.
1766 static struct mbuf *
1767 key_sp2mbuf(struct secpolicy *sp)
1772 tlen = key_getspreqmsglen(sp);
1773 m = m_get2(tlen, M_NOWAIT, MT_DATA, 0);
1778 if (key_sp2msg(sp, m->m_data, &tlen) != 0) {
1786 key_sp2msg(struct secpolicy *sp, void *request, size_t *len)
1788 struct sadb_x_ipsecrequest *xisr;
1789 struct sadb_x_policy *xpl;
1790 struct ipsecrequest *isr;
1795 IPSEC_ASSERT(sp != NULL, ("null policy"));
1797 xlen = sizeof(*xpl);
1802 bzero(request, *len);
1803 xpl = (struct sadb_x_policy *)request;
1804 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1805 xpl->sadb_x_policy_type = sp->policy;
1806 xpl->sadb_x_policy_dir = sp->spidx.dir;
1807 xpl->sadb_x_policy_id = sp->id;
1808 xpl->sadb_x_policy_priority = sp->priority;
1809 switch (sp->state) {
1810 case IPSEC_SPSTATE_IFNET:
1811 xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_IFNET;
1813 case IPSEC_SPSTATE_PCB:
1814 xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_PCB;
1817 xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_GLOBAL;
1820 /* if is the policy for ipsec ? */
1821 if (sp->policy == IPSEC_POLICY_IPSEC) {
1822 p = (caddr_t)xpl + sizeof(*xpl);
1823 for (i = 0; i < sp->tcount; i++) {
1825 ilen = PFKEY_ALIGN8(sizeof(*xisr) +
1826 isr->saidx.src.sa.sa_len +
1827 isr->saidx.dst.sa.sa_len);
1831 /* Calculate needed size */
1834 xisr = (struct sadb_x_ipsecrequest *)p;
1835 xisr->sadb_x_ipsecrequest_len = ilen;
1836 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1837 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1838 xisr->sadb_x_ipsecrequest_level = isr->level;
1839 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1842 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len);
1843 p += isr->saidx.src.sa.sa_len;
1844 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len);
1845 p += isr->saidx.dst.sa.sa_len;
1848 xpl->sadb_x_policy_len = PFKEY_UNIT64(xlen);
1852 *len = sizeof(*xpl);
1856 /* m will not be freed nor modified */
1857 static struct mbuf *
1858 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1859 int ndeep, int nitem, ...)
1864 struct mbuf *result = NULL, *n;
1867 IPSEC_ASSERT(m != NULL, ("null mbuf"));
1868 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
1870 va_start(ap, nitem);
1871 for (i = 0; i < nitem; i++) {
1872 idx = va_arg(ap, int);
1873 if (idx < 0 || idx > SADB_EXT_MAX)
1875 /* don't attempt to pull empty extension */
1876 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1878 if (idx != SADB_EXT_RESERVED &&
1879 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1882 if (idx == SADB_EXT_RESERVED) {
1883 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1885 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len));
1887 MGETHDR(n, M_NOWAIT, MT_DATA);
1892 m_copydata(m, 0, sizeof(struct sadb_msg),
1894 } else if (i < ndeep) {
1895 len = mhp->extlen[idx];
1896 n = m_get2(len, M_NOWAIT, MT_DATA, 0);
1901 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1904 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1917 if ((result->m_flags & M_PKTHDR) != 0) {
1918 result->m_pkthdr.len = 0;
1919 for (n = result; n; n = n->m_next)
1920 result->m_pkthdr.len += n->m_len;
1932 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1933 * add an entry to SP database, when received
1934 * <base, address(SD), (lifetime(H),) policy>
1936 * Adding to SP database,
1938 * <base, address(SD), (lifetime(H),) policy>
1939 * to the socket which was send.
1941 * SPDADD set a unique policy entry.
1942 * SPDSETIDX like SPDADD without a part of policy requests.
1943 * SPDUPDATE replace a unique policy entry.
1945 * XXXAE: serialize this in PF_KEY to avoid races.
1946 * m will always be freed.
1949 key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
1951 struct secpolicyindex spidx;
1952 struct sadb_address *src0, *dst0;
1953 struct sadb_x_policy *xpl0, *xpl;
1954 struct sadb_lifetime *lft = NULL;
1955 struct secpolicy *newsp, *oldsp;
1958 IPSEC_ASSERT(so != NULL, ("null socket"));
1959 IPSEC_ASSERT(m != NULL, ("null mbuf"));
1960 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
1961 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
1963 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
1964 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
1965 SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY)) {
1966 ipseclog((LOG_DEBUG,
1967 "%s: invalid message: missing required header.\n",
1969 return key_senderror(so, m, EINVAL);
1971 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
1972 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) ||
1973 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
1974 ipseclog((LOG_DEBUG,
1975 "%s: invalid message: wrong header size.\n", __func__));
1976 return key_senderror(so, m, EINVAL);
1978 if (!SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD)) {
1979 if (SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_HARD)) {
1980 ipseclog((LOG_DEBUG,
1981 "%s: invalid message: wrong header size.\n",
1983 return key_senderror(so, m, EINVAL);
1985 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1988 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1989 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1990 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1992 /* check the direciton */
1993 switch (xpl0->sadb_x_policy_dir) {
1994 case IPSEC_DIR_INBOUND:
1995 case IPSEC_DIR_OUTBOUND:
1998 ipseclog((LOG_DEBUG, "%s: invalid SP direction.\n", __func__));
1999 return key_senderror(so, m, EINVAL);
2001 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
2002 if (xpl0->sadb_x_policy_type != IPSEC_POLICY_DISCARD &&
2003 xpl0->sadb_x_policy_type != IPSEC_POLICY_NONE &&
2004 xpl0->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
2005 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
2006 return key_senderror(so, m, EINVAL);
2009 /* policy requests are mandatory when action is ipsec. */
2010 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
2011 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
2012 ipseclog((LOG_DEBUG,
2013 "%s: policy requests required.\n", __func__));
2014 return key_senderror(so, m, EINVAL);
2017 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
2018 (struct sockaddr *)(dst0 + 1));
2020 src0->sadb_address_proto != dst0->sadb_address_proto) {
2021 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
2022 return key_senderror(so, m, error);
2025 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2028 src0->sadb_address_prefixlen,
2029 dst0->sadb_address_prefixlen,
2030 src0->sadb_address_proto,
2032 /* Checking there is SP already or not. */
2033 oldsp = key_getsp(&spidx);
2034 if (oldsp != NULL) {
2035 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
2037 printf("%s: unlink SP(%p) for SPDUPDATE\n",
2039 KEYDBG(KEY_DATA, kdebug_secpolicy(oldsp));
2042 ipseclog((LOG_DEBUG,
2043 "%s: a SP entry exists already.\n", __func__));
2044 return (key_senderror(so, m, EEXIST));
2048 /* allocate new SP entry */
2049 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
2050 if (oldsp != NULL) {
2052 key_freesp(&oldsp); /* second for our reference */
2054 return key_senderror(so, m, error);
2057 newsp->lastused = newsp->created = time_second;
2058 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
2059 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
2060 bcopy(&spidx, &newsp->spidx, sizeof(spidx));
2063 if ((newsp->id = key_getnewspid()) == 0) {
2067 if (oldsp != NULL) {
2068 key_freesp(&oldsp); /* first for key_detach */
2069 IPSEC_ASSERT(oldsp != NULL, ("null oldsp: refcount bug"));
2070 key_freesp(&oldsp); /* second for our reference */
2071 if (SPDCACHE_ENABLED()) /* refresh cache because of key_detach */
2075 return key_senderror(so, m, ENOBUFS);
2079 key_insertsp(newsp);
2081 if (oldsp != NULL) {
2082 key_freesp(&oldsp); /* first for key_detach */
2083 IPSEC_ASSERT(oldsp != NULL, ("null oldsp: refcount bug"));
2084 key_freesp(&oldsp); /* second for our reference */
2086 if (SPDCACHE_ENABLED())
2089 printf("%s: SP(%p)\n", __func__, newsp));
2090 KEYDBG(KEY_DATA, kdebug_secpolicy(newsp));
2093 struct mbuf *n, *mpolicy;
2094 struct sadb_msg *newmsg;
2097 /* create new sadb_msg to reply. */
2099 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
2100 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
2101 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2103 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
2105 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2108 return key_senderror(so, m, ENOBUFS);
2110 if (n->m_len < sizeof(*newmsg)) {
2111 n = m_pullup(n, sizeof(*newmsg));
2113 return key_senderror(so, m, ENOBUFS);
2115 newmsg = mtod(n, struct sadb_msg *);
2116 newmsg->sadb_msg_errno = 0;
2117 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2120 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
2121 sizeof(*xpl), &off);
2122 if (mpolicy == NULL) {
2123 /* n is already freed */
2124 return key_senderror(so, m, ENOBUFS);
2126 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
2127 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
2129 return key_senderror(so, m, EINVAL);
2131 xpl->sadb_x_policy_id = newsp->id;
2134 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2139 * get new policy id.
2145 key_getnewspid(void)
2147 struct secpolicy *sp;
2151 SPTREE_WLOCK_ASSERT();
2153 limit = atomic_load_int(&V_key_spi_trycnt);
2154 for (tries = 0; tries < limit; tries++) {
2155 if (V_policy_id == ~0) /* overflowed */
2156 newid = V_policy_id = 1;
2158 newid = ++V_policy_id;
2159 LIST_FOREACH(sp, SPHASH_HASH(newid), idhash) {
2160 if (sp->id == newid)
2166 if (tries == limit || newid == 0) {
2167 ipseclog((LOG_DEBUG, "%s: failed to allocate policy id.\n",
2175 * SADB_SPDDELETE processing
2177 * <base, address(SD), policy(*)>
2178 * from the user(?), and set SADB_SASTATE_DEAD,
2180 * <base, address(SD), policy(*)>
2182 * policy(*) including direction of policy.
2184 * m will always be freed.
2187 key_spddelete(struct socket *so, struct mbuf *m,
2188 const struct sadb_msghdr *mhp)
2190 struct secpolicyindex spidx;
2191 struct sadb_address *src0, *dst0;
2192 struct sadb_x_policy *xpl0;
2193 struct secpolicy *sp;
2195 IPSEC_ASSERT(so != NULL, ("null so"));
2196 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2197 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2198 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2200 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
2201 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
2202 SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY)) {
2203 ipseclog((LOG_DEBUG,
2204 "%s: invalid message: missing required header.\n",
2206 return key_senderror(so, m, EINVAL);
2208 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
2209 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) ||
2210 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
2211 ipseclog((LOG_DEBUG,
2212 "%s: invalid message: wrong header size.\n", __func__));
2213 return key_senderror(so, m, EINVAL);
2216 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
2217 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
2218 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
2220 /* check the direciton */
2221 switch (xpl0->sadb_x_policy_dir) {
2222 case IPSEC_DIR_INBOUND:
2223 case IPSEC_DIR_OUTBOUND:
2226 ipseclog((LOG_DEBUG, "%s: invalid SP direction.\n", __func__));
2227 return key_senderror(so, m, EINVAL);
2229 /* Only DISCARD, NONE and IPSEC are allowed */
2230 if (xpl0->sadb_x_policy_type != IPSEC_POLICY_DISCARD &&
2231 xpl0->sadb_x_policy_type != IPSEC_POLICY_NONE &&
2232 xpl0->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
2233 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
2234 return key_senderror(so, m, EINVAL);
2236 if (key_checksockaddrs((struct sockaddr *)(src0 + 1),
2237 (struct sockaddr *)(dst0 + 1)) != 0 ||
2238 src0->sadb_address_proto != dst0->sadb_address_proto) {
2239 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
2240 return key_senderror(so, m, EINVAL);
2243 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2246 src0->sadb_address_prefixlen,
2247 dst0->sadb_address_prefixlen,
2248 src0->sadb_address_proto,
2251 /* Is there SP in SPD ? */
2252 if ((sp = key_getsp(&spidx)) == NULL) {
2253 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__));
2254 return key_senderror(so, m, EINVAL);
2257 /* save policy id to buffer to be returned. */
2258 xpl0->sadb_x_policy_id = sp->id;
2261 printf("%s: SP(%p)\n", __func__, sp));
2262 KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
2268 struct sadb_msg *newmsg;
2270 /* create new sadb_msg to reply. */
2271 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2272 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2274 return key_senderror(so, m, ENOBUFS);
2276 newmsg = mtod(n, struct sadb_msg *);
2277 newmsg->sadb_msg_errno = 0;
2278 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2281 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2286 * SADB_SPDDELETE2 processing
2289 * from the user(?), and set SADB_SASTATE_DEAD,
2293 * policy(*) including direction of policy.
2295 * m will always be freed.
2298 key_spddelete2(struct socket *so, struct mbuf *m,
2299 const struct sadb_msghdr *mhp)
2301 struct secpolicy *sp;
2304 IPSEC_ASSERT(so != NULL, ("null socket"));
2305 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2306 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2307 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2309 if (SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY) ||
2310 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
2311 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2313 return key_senderror(so, m, EINVAL);
2316 id = ((struct sadb_x_policy *)
2317 mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2319 /* Is there SP in SPD ? */
2320 if ((sp = key_getspbyid(id)) == NULL) {
2321 ipseclog((LOG_DEBUG, "%s: no SP found for id %u.\n",
2323 return key_senderror(so, m, EINVAL);
2327 printf("%s: SP(%p)\n", __func__, sp));
2328 KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
2330 if (sp->state != IPSEC_SPSTATE_DEAD) {
2331 ipseclog((LOG_DEBUG, "%s: failed to delete SP with id %u.\n",
2334 return (key_senderror(so, m, EACCES));
2339 struct mbuf *n, *nn;
2340 struct sadb_msg *newmsg;
2343 /* create new sadb_msg to reply. */
2344 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2346 MGETHDR(n, M_NOWAIT, MT_DATA);
2347 if (n && len > MHLEN) {
2348 if (!(MCLGET(n, M_NOWAIT))) {
2354 return key_senderror(so, m, ENOBUFS);
2360 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2361 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2363 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)",
2366 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2367 mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT);
2370 return key_senderror(so, m, ENOBUFS);
2373 n->m_pkthdr.len = 0;
2374 for (nn = n; nn; nn = nn->m_next)
2375 n->m_pkthdr.len += nn->m_len;
2377 newmsg = mtod(n, struct sadb_msg *);
2378 newmsg->sadb_msg_errno = 0;
2379 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2382 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2387 * SADB_X_SPDGET processing
2392 * <base, address(SD), policy>
2394 * policy(*) including direction of policy.
2396 * m will always be freed.
2399 key_spdget(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
2401 struct secpolicy *sp;
2405 IPSEC_ASSERT(so != NULL, ("null socket"));
2406 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2407 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2408 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2410 if (SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY) ||
2411 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
2412 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2414 return key_senderror(so, m, EINVAL);
2417 id = ((struct sadb_x_policy *)
2418 mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2420 /* Is there SP in SPD ? */
2421 if ((sp = key_getspbyid(id)) == NULL) {
2422 ipseclog((LOG_DEBUG, "%s: no SP found for id %u.\n",
2424 return key_senderror(so, m, ENOENT);
2427 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq,
2428 mhp->msg->sadb_msg_pid);
2432 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2434 return key_senderror(so, m, ENOBUFS);
2438 * SADB_X_SPDACQUIRE processing.
2439 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2442 * to KMD, and expect to receive
2443 * <base> with SADB_X_SPDACQUIRE if error occurred,
2446 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2447 * policy(*) is without policy requests.
2450 * others: error number
2453 key_spdacquire(struct secpolicy *sp)
2455 struct mbuf *result = NULL, *m;
2456 struct secspacq *newspacq;
2458 IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
2459 IPSEC_ASSERT(sp->req == NULL, ("policy exists"));
2460 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC,
2461 ("policy not IPSEC %u", sp->policy));
2463 /* Get an entry to check whether sent message or not. */
2464 newspacq = key_getspacq(&sp->spidx);
2465 if (newspacq != NULL) {
2466 if (V_key_blockacq_count < newspacq->count) {
2467 /* reset counter and do send message. */
2468 newspacq->count = 0;
2470 /* increment counter and do nothing. */
2477 /* make new entry for blocking to send SADB_ACQUIRE. */
2478 newspacq = key_newspacq(&sp->spidx);
2479 if (newspacq == NULL)
2483 /* create new sadb_msg to reply. */
2484 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2490 result->m_pkthdr.len = 0;
2491 for (m = result; m; m = m->m_next)
2492 result->m_pkthdr.len += m->m_len;
2494 mtod(result, struct sadb_msg *)->sadb_msg_len =
2495 PFKEY_UNIT64(result->m_pkthdr.len);
2497 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2501 * SADB_SPDFLUSH processing
2504 * from the user, and free all entries in secpctree.
2508 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2510 * m will always be freed.
2513 key_spdflush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
2515 struct secpolicy_queue drainq;
2516 struct sadb_msg *newmsg;
2517 struct secpolicy *sp, *nextsp;
2520 IPSEC_ASSERT(so != NULL, ("null socket"));
2521 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2522 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2523 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2525 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2526 return key_senderror(so, m, EINVAL);
2528 TAILQ_INIT(&drainq);
2530 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2531 TAILQ_CONCAT(&drainq, &V_sptree[dir], chain);
2534 * We need to set state to DEAD for each policy to be sure,
2535 * that another thread won't try to unlink it.
2536 * Also remove SP from sphash.
2538 TAILQ_FOREACH(sp, &drainq, chain) {
2539 sp->state = IPSEC_SPSTATE_DEAD;
2540 LIST_REMOVE(sp, idhash);
2545 if (SPDCACHE_ENABLED())
2547 sp = TAILQ_FIRST(&drainq);
2548 while (sp != NULL) {
2549 nextsp = TAILQ_NEXT(sp, chain);
2554 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2555 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
2556 return key_senderror(so, m, ENOBUFS);
2562 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2563 newmsg = mtod(m, struct sadb_msg *);
2564 newmsg->sadb_msg_errno = 0;
2565 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2567 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2571 key_satype2scopemask(uint8_t satype)
2574 if (satype == IPSEC_POLICYSCOPE_ANY)
2579 * SADB_SPDDUMP processing
2582 * from the user, and dump all SP leaves and send,
2587 * sadb_msg_satype is considered as mask of policy scopes.
2588 * m will always be freed.
2591 key_spddump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
2593 SPTREE_RLOCK_TRACKER;
2594 struct secpolicy *sp;
2599 IPSEC_ASSERT(so != NULL, ("null socket"));
2600 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2601 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2602 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2604 /* search SPD entry and get buffer size. */
2606 scope = key_satype2scopemask(mhp->msg->sadb_msg_satype);
2608 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2609 if (scope & IPSEC_POLICYSCOPE_GLOBAL) {
2610 TAILQ_FOREACH(sp, &V_sptree[dir], chain)
2613 if (scope & IPSEC_POLICYSCOPE_IFNET) {
2614 TAILQ_FOREACH(sp, &V_sptree_ifnet[dir], chain)
2621 return key_senderror(so, m, ENOENT);
2624 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2625 if (scope & IPSEC_POLICYSCOPE_GLOBAL) {
2626 TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
2628 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2629 mhp->msg->sadb_msg_pid);
2632 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2635 if (scope & IPSEC_POLICYSCOPE_IFNET) {
2636 TAILQ_FOREACH(sp, &V_sptree_ifnet[dir], chain) {
2638 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2639 mhp->msg->sadb_msg_pid);
2642 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2652 static struct mbuf *
2653 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2656 struct mbuf *result = NULL, *m;
2657 struct seclifetime lt;
2659 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2664 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2665 &sp->spidx.src.sa, sp->spidx.prefs,
2666 sp->spidx.ul_proto);
2671 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2672 &sp->spidx.dst.sa, sp->spidx.prefd,
2673 sp->spidx.ul_proto);
2678 m = key_sp2mbuf(sp);
2684 lt.addtime=sp->created;
2685 lt.usetime= sp->lastused;
2686 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT);
2691 lt.addtime=sp->lifetime;
2692 lt.usetime= sp->validtime;
2693 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD);
2699 if ((result->m_flags & M_PKTHDR) == 0)
2702 if (result->m_len < sizeof(struct sadb_msg)) {
2703 result = m_pullup(result, sizeof(struct sadb_msg));
2708 result->m_pkthdr.len = 0;
2709 for (m = result; m; m = m->m_next)
2710 result->m_pkthdr.len += m->m_len;
2712 mtod(result, struct sadb_msg *)->sadb_msg_len =
2713 PFKEY_UNIT64(result->m_pkthdr.len);
2722 * get PFKEY message length for security policy and request.
2725 key_getspreqmsglen(struct secpolicy *sp)
2730 tlen = sizeof(struct sadb_x_policy);
2731 /* if is the policy for ipsec ? */
2732 if (sp->policy != IPSEC_POLICY_IPSEC)
2735 /* get length of ipsec requests */
2736 for (i = 0; i < sp->tcount; i++) {
2737 len = sizeof(struct sadb_x_ipsecrequest)
2738 + sp->req[i]->saidx.src.sa.sa_len
2739 + sp->req[i]->saidx.dst.sa.sa_len;
2741 tlen += PFKEY_ALIGN8(len);
2747 * SADB_SPDEXPIRE processing
2749 * <base, address(SD), lifetime(CH), policy>
2753 * others : error number
2756 key_spdexpire(struct secpolicy *sp)
2758 struct sadb_lifetime *lt;
2759 struct mbuf *result = NULL, *m;
2760 int len, error = -1;
2762 IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
2765 printf("%s: SP(%p)\n", __func__, sp));
2766 KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
2768 /* set msg header */
2769 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2776 /* create lifetime extension (current and hard) */
2777 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2778 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
2785 bzero(mtod(m, caddr_t), len);
2786 lt = mtod(m, struct sadb_lifetime *);
2787 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2788 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2789 lt->sadb_lifetime_allocations = 0;
2790 lt->sadb_lifetime_bytes = 0;
2791 lt->sadb_lifetime_addtime = sp->created;
2792 lt->sadb_lifetime_usetime = sp->lastused;
2793 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2794 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2795 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2796 lt->sadb_lifetime_allocations = 0;
2797 lt->sadb_lifetime_bytes = 0;
2798 lt->sadb_lifetime_addtime = sp->lifetime;
2799 lt->sadb_lifetime_usetime = sp->validtime;
2802 /* set sadb_address for source */
2803 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2805 sp->spidx.prefs, sp->spidx.ul_proto);
2812 /* set sadb_address for destination */
2813 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2815 sp->spidx.prefd, sp->spidx.ul_proto);
2823 m = key_sp2mbuf(sp);
2830 if ((result->m_flags & M_PKTHDR) == 0) {
2835 if (result->m_len < sizeof(struct sadb_msg)) {
2836 result = m_pullup(result, sizeof(struct sadb_msg));
2837 if (result == NULL) {
2843 result->m_pkthdr.len = 0;
2844 for (m = result; m; m = m->m_next)
2845 result->m_pkthdr.len += m->m_len;
2847 mtod(result, struct sadb_msg *)->sadb_msg_len =
2848 PFKEY_UNIT64(result->m_pkthdr.len);
2850 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2858 /* %%% SAD management */
2860 * allocating and initialize new SA head.
2861 * OUT: NULL : failure due to the lack of memory.
2862 * others : pointer to new SA head.
2864 static struct secashead *
2865 key_newsah(struct secasindex *saidx)
2867 struct secashead *sah;
2869 sah = malloc(sizeof(struct secashead), M_IPSEC_SAH,
2872 PFKEYSTAT_INC(in_nomem);
2875 TAILQ_INIT(&sah->savtree_larval);
2876 TAILQ_INIT(&sah->savtree_alive);
2877 sah->saidx = *saidx;
2878 sah->state = SADB_SASTATE_DEAD;
2882 printf("%s: SAH(%p)\n", __func__, sah));
2883 KEYDBG(KEY_DATA, kdebug_secash(sah, NULL));
2888 key_freesah(struct secashead **psah)
2890 struct secashead *sah = *psah;
2892 CURVNET_ASSERT_SET();
2894 if (SAH_DELREF(sah) == 0)
2898 printf("%s: last reference to SAH(%p)\n", __func__, sah));
2899 KEYDBG(KEY_DATA, kdebug_secash(sah, NULL));
2906 key_delsah(struct secashead *sah)
2908 IPSEC_ASSERT(sah != NULL, ("NULL sah"));
2909 IPSEC_ASSERT(sah->state == SADB_SASTATE_DEAD,
2910 ("Attempt to free non DEAD SAH %p", sah));
2911 IPSEC_ASSERT(TAILQ_EMPTY(&sah->savtree_larval),
2912 ("Attempt to free SAH %p with LARVAL SA", sah));
2913 IPSEC_ASSERT(TAILQ_EMPTY(&sah->savtree_alive),
2914 ("Attempt to free SAH %p with ALIVE SA", sah));
2916 free(sah, M_IPSEC_SAH);
2920 * allocating a new SA for key_add() and key_getspi() call,
2921 * and copy the values of mhp into new buffer.
2922 * When SAD message type is SADB_GETSPI set SA state to LARVAL.
2923 * For SADB_ADD create and initialize SA with MATURE state.
2925 * others : pointer to new secasvar.
2927 static struct secasvar *
2928 key_newsav(const struct sadb_msghdr *mhp, struct secasindex *saidx,
2929 uint32_t spi, int *errp)
2931 struct secashead *sah;
2932 struct secasvar *sav;
2935 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2936 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2937 IPSEC_ASSERT(mhp->msg->sadb_msg_type == SADB_GETSPI ||
2938 mhp->msg->sadb_msg_type == SADB_ADD, ("wrong message type"));
2942 /* check SPI value */
2943 switch (saidx->proto) {
2947 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values
2948 * 1-255 reserved by IANA for future use,
2949 * 0 for implementation specific, local use.
2951 if (ntohl(spi) <= 255) {
2952 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n",
2953 __func__, ntohl(spi)));
2960 sav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT | M_ZERO);
2965 sav->lock = malloc_aligned(max(sizeof(struct rmlock),
2966 CACHE_LINE_SIZE), CACHE_LINE_SIZE, M_IPSEC_MISC,
2968 if (sav->lock == NULL) {
2972 rm_init(sav->lock, "ipsec association");
2973 sav->lft_c = uma_zalloc_pcpu(ipsec_key_lft_zone, M_NOWAIT | M_ZERO);
2974 if (sav->lft_c == NULL) {
2980 sav->seq = mhp->msg->sadb_msg_seq;
2981 sav->state = SADB_SASTATE_LARVAL;
2982 sav->pid = (pid_t)mhp->msg->sadb_msg_pid;
2985 sah = key_getsah(saidx);
2987 /* create a new SA index */
2988 sah = key_newsah(saidx);
2990 ipseclog((LOG_DEBUG,
2991 "%s: No more memory.\n", __func__));
3000 if (mhp->msg->sadb_msg_type == SADB_GETSPI) {
3001 sav->created = time_second;
3002 } else if (sav->state == SADB_SASTATE_LARVAL) {
3004 * Do not call key_setsaval() second time in case
3005 * of `goto again`. We will have MATURE state.
3007 *errp = key_setsaval(sav, mhp);
3010 sav->state = SADB_SASTATE_MATURE;
3015 * Check that existing SAH wasn't unlinked.
3016 * Since we didn't hold the SAHTREE lock, it is possible,
3017 * that callout handler or key_flush() or key_delete() could
3020 if (isnew == 0 && sah->state == SADB_SASTATE_DEAD) {
3022 key_freesah(&sah); /* reference from key_getsah() */
3027 * Add new SAH into SADB.
3029 * XXXAE: we can serialize key_add and key_getspi calls, so
3030 * several threads will not fight in the race.
3031 * Otherwise we should check under SAHTREE lock, that this
3032 * SAH would not added twice.
3034 TAILQ_INSERT_HEAD(&V_sahtree, sah, chain);
3035 /* Add new SAH into hash by addresses */
3036 LIST_INSERT_HEAD(SAHADDRHASH_HASH(saidx), sah, addrhash);
3037 /* Now we are linked in the chain */
3038 sah->state = SADB_SASTATE_MATURE;
3040 * SAV references this new SAH.
3041 * In case of existing SAH we reuse reference
3042 * from key_getsah().
3046 /* Link SAV with SAH */
3047 if (sav->state == SADB_SASTATE_MATURE)
3048 TAILQ_INSERT_HEAD(&sah->savtree_alive, sav, chain);
3050 TAILQ_INSERT_HEAD(&sah->savtree_larval, sav, chain);
3051 /* Add SAV into SPI hash */
3052 LIST_INSERT_HEAD(SAVHASH_HASH(sav->spi), sav, spihash);
3054 *errp = 0; /* success */
3058 if (sav->lock != NULL) {
3059 rm_destroy(sav->lock);
3060 free(sav->lock, M_IPSEC_MISC);
3062 if (sav->lft_c != NULL)
3063 uma_zfree_pcpu(ipsec_key_lft_zone, sav->lft_c);
3064 free(sav, M_IPSEC_SA), sav = NULL;
3068 if (*errp == ENOBUFS) {
3069 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3071 PFKEYSTAT_INC(in_nomem);
3078 * free() SA variable entry.
3081 key_cleansav(struct secasvar *sav)
3084 if (sav->natt != NULL) {
3085 free(sav->natt, M_IPSEC_MISC);
3088 if (sav->flags & SADB_X_EXT_F_CLONED)
3090 if (sav->tdb_xform != NULL) {
3091 sav->tdb_xform->xf_cleanup(sav);
3092 sav->tdb_xform = NULL;
3094 if (sav->key_auth != NULL) {
3095 zfree(sav->key_auth->key_data, M_IPSEC_MISC);
3096 free(sav->key_auth, M_IPSEC_MISC);
3097 sav->key_auth = NULL;
3099 if (sav->key_enc != NULL) {
3100 zfree(sav->key_enc->key_data, M_IPSEC_MISC);
3101 free(sav->key_enc, M_IPSEC_MISC);
3102 sav->key_enc = NULL;
3104 if (sav->replay != NULL) {
3105 mtx_destroy(&sav->replay->lock);
3106 if (sav->replay->bitmap != NULL)
3107 free(sav->replay->bitmap, M_IPSEC_MISC);
3108 free(sav->replay, M_IPSEC_MISC);
3111 if (sav->lft_h != NULL) {
3112 free(sav->lft_h, M_IPSEC_MISC);
3115 if (sav->lft_s != NULL) {
3116 free(sav->lft_s, M_IPSEC_MISC);
3122 * free() SA variable entry.
3125 key_delsav(struct secasvar *sav)
3127 IPSEC_ASSERT(sav != NULL, ("null sav"));
3128 IPSEC_ASSERT(sav->state == SADB_SASTATE_DEAD,
3129 ("attempt to free non DEAD SA %p", sav));
3130 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0",
3134 * SA must be unlinked from the chain and hashtbl.
3135 * If SA was cloned, we leave all fields untouched,
3136 * except NAT-T config.
3139 if ((sav->flags & SADB_X_EXT_F_CLONED) == 0) {
3140 rm_destroy(sav->lock);
3141 free(sav->lock, M_IPSEC_MISC);
3142 uma_zfree_pcpu(ipsec_key_lft_zone, sav->lft_c);
3144 free(sav, M_IPSEC_SA);
3151 * others : found, referenced pointer to a SAH.
3153 static struct secashead *
3154 key_getsah(struct secasindex *saidx)
3156 SAHTREE_RLOCK_TRACKER;
3157 struct secashead *sah;
3160 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
3161 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID) != 0) {
3171 * Check not to be duplicated SPI.
3174 * 1 : found SA with given SPI.
3177 key_checkspidup(uint32_t spi)
3179 SAHTREE_RLOCK_TRACKER;
3180 struct secasvar *sav;
3182 /* Assume SPI is in network byte order */
3184 LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) {
3185 if (sav->spi == spi)
3189 return (sav != NULL);
3196 * others : found, referenced pointer to a SA.
3198 static struct secasvar *
3199 key_getsavbyspi(uint32_t spi)
3201 SAHTREE_RLOCK_TRACKER;
3202 struct secasvar *sav;
3204 /* Assume SPI is in network byte order */
3206 LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) {
3207 if (sav->spi != spi)
3217 key_updatelifetimes(struct secasvar *sav, const struct sadb_msghdr *mhp)
3219 struct seclifetime *lft_h, *lft_s, *tmp;
3221 /* Lifetime extension is optional, check that it is present. */
3222 if (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
3223 SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) {
3225 * In case of SADB_UPDATE we may need to change
3226 * existing lifetimes.
3228 if (sav->state == SADB_SASTATE_MATURE) {
3229 lft_h = lft_s = NULL;
3234 /* Both HARD and SOFT extensions must present */
3235 if ((SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
3236 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) ||
3237 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) &&
3238 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) {
3239 ipseclog((LOG_DEBUG,
3240 "%s: invalid message: missing required header.\n",
3244 if (SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_HARD) ||
3245 SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_SOFT)) {
3246 ipseclog((LOG_DEBUG,
3247 "%s: invalid message: wrong header size.\n", __func__));
3250 lft_h = key_dup_lifemsg((const struct sadb_lifetime *)
3251 mhp->ext[SADB_EXT_LIFETIME_HARD], M_IPSEC_MISC);
3252 if (lft_h == NULL) {
3253 PFKEYSTAT_INC(in_nomem);
3254 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3257 lft_s = key_dup_lifemsg((const struct sadb_lifetime *)
3258 mhp->ext[SADB_EXT_LIFETIME_SOFT], M_IPSEC_MISC);
3259 if (lft_s == NULL) {
3260 PFKEYSTAT_INC(in_nomem);
3261 free(lft_h, M_IPSEC_MISC);
3262 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3266 if (sav->state != SADB_SASTATE_LARVAL) {
3268 * key_update() holds reference to this SA,
3269 * so it won't be deleted in meanwhile.
3271 SECASVAR_WLOCK(sav);
3279 SECASVAR_WUNLOCK(sav);
3281 free(lft_h, M_IPSEC_MISC);
3283 free(lft_s, M_IPSEC_MISC);
3286 /* We can update lifetime without holding a lock */
3287 IPSEC_ASSERT(sav->lft_h == NULL, ("lft_h is already initialized\n"));
3288 IPSEC_ASSERT(sav->lft_s == NULL, ("lft_s is already initialized\n"));
3295 * copy SA values from PF_KEY message except *SPI, SEQ, PID and TYPE*.
3296 * You must update these if need. Expects only LARVAL SAs.
3301 key_setsaval(struct secasvar *sav, const struct sadb_msghdr *mhp)
3303 const struct sadb_sa *sa0;
3304 const struct sadb_key *key0;
3309 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
3310 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
3311 IPSEC_ASSERT(sav->state == SADB_SASTATE_LARVAL,
3312 ("Attempt to update non LARVAL SA"));
3315 error = key_setident(sav->sah, mhp);
3320 if (!SADB_CHECKHDR(mhp, SADB_EXT_SA)) {
3321 if (SADB_CHECKLEN(mhp, SADB_EXT_SA)) {
3325 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
3326 sav->alg_auth = sa0->sadb_sa_auth;
3327 sav->alg_enc = sa0->sadb_sa_encrypt;
3328 sav->flags = sa0->sadb_sa_flags;
3329 if ((sav->flags & SADB_KEY_FLAGS_MAX) != sav->flags) {
3330 ipseclog((LOG_DEBUG,
3331 "%s: invalid sa_flags 0x%08x.\n", __func__,
3337 /* Optional replay window */
3339 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0)
3340 replay = sa0->sadb_sa_replay;
3341 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_SA_REPLAY)) {
3342 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA_REPLAY)) {
3346 replay = ((const struct sadb_x_sa_replay *)
3347 mhp->ext[SADB_X_EXT_SA_REPLAY])->sadb_x_sa_replay_replay;
3349 if (replay > UINT32_MAX - 32) {
3350 ipseclog((LOG_DEBUG,
3351 "%s: replay window too big.\n", __func__));
3356 replay = (replay + 7) >> 3;
3359 sav->replay = malloc(sizeof(struct secreplay), M_IPSEC_MISC,
3361 if (sav->replay == NULL) {
3362 PFKEYSTAT_INC(in_nomem);
3363 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3368 mtx_init(&sav->replay->lock, "ipsec replay", NULL, MTX_DEF);
3371 /* number of 32b blocks to be allocated */
3372 uint32_t bitmap_size;
3375 * - the allocated replay window size must be
3377 * - use an extra 32b block as a redundant window.
3380 while (replay + 4 > bitmap_size)
3382 bitmap_size = bitmap_size / 4;
3384 sav->replay->bitmap = malloc(
3385 bitmap_size * sizeof(uint32_t), M_IPSEC_MISC,
3387 if (sav->replay->bitmap == NULL) {
3388 PFKEYSTAT_INC(in_nomem);
3389 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3394 sav->replay->bitmap_size = bitmap_size;
3395 sav->replay->wsize = replay;
3399 /* Authentication keys */
3400 if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH)) {
3401 if (SADB_CHECKLEN(mhp, SADB_EXT_KEY_AUTH)) {
3406 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
3407 len = mhp->extlen[SADB_EXT_KEY_AUTH];
3408 switch (mhp->msg->sadb_msg_satype) {
3409 case SADB_SATYPE_AH:
3410 case SADB_SATYPE_ESP:
3411 case SADB_X_SATYPE_TCPSIGNATURE:
3412 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3413 sav->alg_auth != SADB_X_AALG_NULL)
3416 case SADB_X_SATYPE_IPCOMP:
3422 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n",
3427 sav->key_auth = key_dup_keymsg(key0, len, M_IPSEC_MISC);
3428 if (sav->key_auth == NULL ) {
3429 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3431 PFKEYSTAT_INC(in_nomem);
3437 /* Encryption key */
3438 if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT)) {
3439 if (SADB_CHECKLEN(mhp, SADB_EXT_KEY_ENCRYPT)) {
3444 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
3445 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
3446 switch (mhp->msg->sadb_msg_satype) {
3447 case SADB_SATYPE_ESP:
3448 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3449 sav->alg_enc != SADB_EALG_NULL) {
3453 sav->key_enc = key_dup_keymsg(key0, len, M_IPSEC_MISC);
3454 if (sav->key_enc == NULL) {
3455 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3457 PFKEYSTAT_INC(in_nomem);
3462 case SADB_X_SATYPE_IPCOMP:
3463 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3465 sav->key_enc = NULL; /*just in case*/
3467 case SADB_SATYPE_AH:
3468 case SADB_X_SATYPE_TCPSIGNATURE:
3474 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n",
3482 switch (mhp->msg->sadb_msg_satype) {
3483 case SADB_SATYPE_AH:
3484 if (sav->flags & SADB_X_EXT_DERIV) {
3485 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
3486 "given to AH SA.\n", __func__));
3490 if (sav->alg_enc != SADB_EALG_NONE) {
3491 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3492 "mismated.\n", __func__));
3496 error = xform_init(sav, XF_AH);
3498 case SADB_SATYPE_ESP:
3499 if ((sav->flags & (SADB_X_EXT_OLD | SADB_X_EXT_DERIV)) ==
3500 (SADB_X_EXT_OLD | SADB_X_EXT_DERIV)) {
3501 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
3502 "given to old-esp.\n", __func__));
3506 error = xform_init(sav, XF_ESP);
3508 case SADB_X_SATYPE_IPCOMP:
3509 if (sav->alg_auth != SADB_AALG_NONE) {
3510 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3511 "mismated.\n", __func__));
3515 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 &&
3516 ntohl(sav->spi) >= 0x10000) {
3517 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n",
3522 error = xform_init(sav, XF_IPCOMP);
3524 case SADB_X_SATYPE_TCPSIGNATURE:
3525 if (sav->alg_enc != SADB_EALG_NONE) {
3526 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3527 "mismated.\n", __func__));
3531 error = xform_init(sav, XF_TCPSIGNATURE);
3534 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__));
3535 error = EPROTONOSUPPORT;
3539 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n",
3540 __func__, mhp->msg->sadb_msg_satype));
3544 /* Handle NAT-T headers */
3545 error = key_setnatt(sav, mhp);
3549 /* Initialize lifetime for CURRENT */
3551 sav->created = time_second;
3553 /* lifetimes for HARD and SOFT */
3554 error = key_updatelifetimes(sav, mhp);
3563 * subroutine for SADB_GET and SADB_DUMP.
3565 static struct mbuf *
3566 key_setdumpsa(struct secasvar *sav, uint8_t type, uint8_t satype,
3567 uint32_t seq, uint32_t pid)
3569 struct seclifetime lft_c;
3570 struct mbuf *result = NULL, *tres = NULL, *m;
3571 int i, dumporder[] = {
3572 SADB_EXT_SA, SADB_X_EXT_SA2, SADB_X_EXT_SA_REPLAY,
3573 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3574 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3575 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY,
3576 SADB_EXT_KEY_AUTH, SADB_EXT_KEY_ENCRYPT,
3577 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST,
3578 SADB_EXT_SENSITIVITY,
3579 SADB_X_EXT_NAT_T_TYPE,
3580 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT,
3581 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR,
3582 SADB_X_EXT_NAT_T_FRAG,
3584 uint32_t replay_count;
3586 SECASVAR_RLOCK_TRACKER;
3588 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3593 for (i = nitems(dumporder) - 1; i >= 0; i--) {
3595 switch (dumporder[i]) {
3597 m = key_setsadbsa(sav);
3602 case SADB_X_EXT_SA2: {
3603 SECASVAR_RLOCK(sav);
3604 replay_count = sav->replay ? sav->replay->count : 0;
3605 SECASVAR_RUNLOCK(sav);
3606 m = key_setsadbxsa2(sav->sah->saidx.mode, replay_count,
3607 sav->sah->saidx.reqid);
3612 case SADB_X_EXT_SA_REPLAY:
3613 if (sav->replay == NULL ||
3614 sav->replay->wsize <= UINT8_MAX)
3617 m = key_setsadbxsareplay(sav->replay->wsize);
3622 case SADB_EXT_ADDRESS_SRC:
3623 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3624 &sav->sah->saidx.src.sa,
3625 FULLMASK, IPSEC_ULPROTO_ANY);
3630 case SADB_EXT_ADDRESS_DST:
3631 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3632 &sav->sah->saidx.dst.sa,
3633 FULLMASK, IPSEC_ULPROTO_ANY);
3638 case SADB_EXT_KEY_AUTH:
3641 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH);
3646 case SADB_EXT_KEY_ENCRYPT:
3649 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT);
3654 case SADB_EXT_LIFETIME_CURRENT:
3655 lft_c.addtime = sav->created;
3656 lft_c.allocations = (uint32_t)counter_u64_fetch(
3657 sav->lft_c_allocations);
3658 lft_c.bytes = counter_u64_fetch(sav->lft_c_bytes);
3659 lft_c.usetime = sav->firstused;
3660 m = key_setlifetime(&lft_c, SADB_EXT_LIFETIME_CURRENT);
3665 case SADB_EXT_LIFETIME_HARD:
3668 m = key_setlifetime(sav->lft_h,
3669 SADB_EXT_LIFETIME_HARD);
3674 case SADB_EXT_LIFETIME_SOFT:
3677 m = key_setlifetime(sav->lft_s,
3678 SADB_EXT_LIFETIME_SOFT);
3684 case SADB_X_EXT_NAT_T_TYPE:
3685 if (sav->natt == NULL)
3687 m = key_setsadbxtype(UDP_ENCAP_ESPINUDP);
3692 case SADB_X_EXT_NAT_T_DPORT:
3693 if (sav->natt == NULL)
3695 m = key_setsadbxport(sav->natt->dport,
3696 SADB_X_EXT_NAT_T_DPORT);
3701 case SADB_X_EXT_NAT_T_SPORT:
3702 if (sav->natt == NULL)
3704 m = key_setsadbxport(sav->natt->sport,
3705 SADB_X_EXT_NAT_T_SPORT);
3710 case SADB_X_EXT_NAT_T_OAI:
3711 if (sav->natt == NULL ||
3712 (sav->natt->flags & IPSEC_NATT_F_OAI) == 0)
3714 m = key_setsadbaddr(SADB_X_EXT_NAT_T_OAI,
3715 &sav->natt->oai.sa, FULLMASK, IPSEC_ULPROTO_ANY);
3719 case SADB_X_EXT_NAT_T_OAR:
3720 if (sav->natt == NULL ||
3721 (sav->natt->flags & IPSEC_NATT_F_OAR) == 0)
3723 m = key_setsadbaddr(SADB_X_EXT_NAT_T_OAR,
3724 &sav->natt->oar.sa, FULLMASK, IPSEC_ULPROTO_ANY);
3728 case SADB_X_EXT_NAT_T_FRAG:
3729 /* We do not (yet) support those. */
3732 case SADB_EXT_ADDRESS_PROXY:
3733 case SADB_EXT_IDENTITY_SRC:
3734 case SADB_EXT_IDENTITY_DST:
3735 /* XXX: should we brought from SPD ? */
3736 case SADB_EXT_SENSITIVITY:
3748 m_cat(result, tres);
3750 if (result->m_len < sizeof(struct sadb_msg)) {
3751 result = m_pullup(result, sizeof(struct sadb_msg));
3756 result->m_pkthdr.len = 0;
3757 for (m = result; m; m = m->m_next)
3758 result->m_pkthdr.len += m->m_len;
3760 mtod(result, struct sadb_msg *)->sadb_msg_len =
3761 PFKEY_UNIT64(result->m_pkthdr.len);
3772 * set data into sadb_msg.
3774 static struct mbuf *
3775 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq,
3776 pid_t pid, u_int16_t reserved)
3782 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3785 MGETHDR(m, M_NOWAIT, MT_DATA);
3786 if (m && len > MHLEN) {
3787 if (!(MCLGET(m, M_NOWAIT))) {
3794 m->m_pkthdr.len = m->m_len = len;
3797 p = mtod(m, struct sadb_msg *);
3800 p->sadb_msg_version = PF_KEY_V2;
3801 p->sadb_msg_type = type;
3802 p->sadb_msg_errno = 0;
3803 p->sadb_msg_satype = satype;
3804 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3805 p->sadb_msg_reserved = reserved;
3806 p->sadb_msg_seq = seq;
3807 p->sadb_msg_pid = (u_int32_t)pid;
3813 * copy secasvar data into sadb_address.
3815 static struct mbuf *
3816 key_setsadbsa(struct secasvar *sav)
3822 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3823 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3828 p = mtod(m, struct sadb_sa *);
3830 p->sadb_sa_len = PFKEY_UNIT64(len);
3831 p->sadb_sa_exttype = SADB_EXT_SA;
3832 p->sadb_sa_spi = sav->spi;
3833 p->sadb_sa_replay = sav->replay ?
3834 (sav->replay->wsize > UINT8_MAX ? UINT8_MAX :
3835 sav->replay->wsize): 0;
3836 p->sadb_sa_state = sav->state;
3837 p->sadb_sa_auth = sav->alg_auth;
3838 p->sadb_sa_encrypt = sav->alg_enc;
3839 p->sadb_sa_flags = sav->flags & SADB_KEY_FLAGS_MAX;
3844 * set data into sadb_address.
3846 static struct mbuf *
3847 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr,
3848 u_int8_t prefixlen, u_int16_t ul_proto)
3851 struct sadb_address *p;
3854 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3855 PFKEY_ALIGN8(saddr->sa_len);
3856 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3861 p = mtod(m, struct sadb_address *);
3864 p->sadb_address_len = PFKEY_UNIT64(len);
3865 p->sadb_address_exttype = exttype;
3866 p->sadb_address_proto = ul_proto;
3867 if (prefixlen == FULLMASK) {
3868 switch (saddr->sa_family) {
3870 prefixlen = sizeof(struct in_addr) << 3;
3873 prefixlen = sizeof(struct in6_addr) << 3;
3879 p->sadb_address_prefixlen = prefixlen;
3880 p->sadb_address_reserved = 0;
3883 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3890 * set data into sadb_x_sa2.
3892 static struct mbuf *
3893 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3896 struct sadb_x_sa2 *p;
3899 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3900 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3905 p = mtod(m, struct sadb_x_sa2 *);
3908 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3909 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3910 p->sadb_x_sa2_mode = mode;
3911 p->sadb_x_sa2_reserved1 = 0;
3912 p->sadb_x_sa2_reserved2 = 0;
3913 p->sadb_x_sa2_sequence = seq;
3914 p->sadb_x_sa2_reqid = reqid;
3920 * Set data into sadb_x_sa_replay.
3922 static struct mbuf *
3923 key_setsadbxsareplay(u_int32_t replay)
3926 struct sadb_x_sa_replay *p;
3929 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa_replay));
3930 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3935 p = mtod(m, struct sadb_x_sa_replay *);
3938 p->sadb_x_sa_replay_len = PFKEY_UNIT64(len);
3939 p->sadb_x_sa_replay_exttype = SADB_X_EXT_SA_REPLAY;
3940 p->sadb_x_sa_replay_replay = (replay << 3);
3946 * Set a type in sadb_x_nat_t_type.
3948 static struct mbuf *
3949 key_setsadbxtype(u_int16_t type)
3953 struct sadb_x_nat_t_type *p;
3955 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type));
3957 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3962 p = mtod(m, struct sadb_x_nat_t_type *);
3965 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len);
3966 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
3967 p->sadb_x_nat_t_type_type = type;
3972 * Set a port in sadb_x_nat_t_port.
3973 * In contrast to default RFC 2367 behaviour, port is in network byte order.
3975 static struct mbuf *
3976 key_setsadbxport(u_int16_t port, u_int16_t type)
3980 struct sadb_x_nat_t_port *p;
3982 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port));
3984 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3989 p = mtod(m, struct sadb_x_nat_t_port *);
3992 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len);
3993 p->sadb_x_nat_t_port_exttype = type;
3994 p->sadb_x_nat_t_port_port = port;
4000 * Get port from sockaddr. Port is in network byte order.
4003 key_portfromsaddr(struct sockaddr *sa)
4006 switch (sa->sa_family) {
4009 return ((struct sockaddr_in *)sa)->sin_port;
4013 return ((struct sockaddr_in6 *)sa)->sin6_port;
4020 * Set port in struct sockaddr. Port is in network byte order.
4023 key_porttosaddr(struct sockaddr *sa, uint16_t port)
4026 switch (sa->sa_family) {
4029 ((struct sockaddr_in *)sa)->sin_port = port;
4034 ((struct sockaddr_in6 *)sa)->sin6_port = port;
4038 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n",
4039 __func__, sa->sa_family));
4045 * set data into sadb_x_policy
4047 static struct mbuf *
4048 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id, u_int32_t priority)
4051 struct sadb_x_policy *p;
4054 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
4055 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
4060 p = mtod(m, struct sadb_x_policy *);
4063 p->sadb_x_policy_len = PFKEY_UNIT64(len);
4064 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
4065 p->sadb_x_policy_type = type;
4066 p->sadb_x_policy_dir = dir;
4067 p->sadb_x_policy_id = id;
4068 p->sadb_x_policy_priority = priority;
4074 /* Take a key message (sadb_key) from the socket and turn it into one
4075 * of the kernel's key structures (seckey).
4077 * IN: pointer to the src
4078 * OUT: NULL no more memory
4081 key_dup_keymsg(const struct sadb_key *src, size_t len,
4082 struct malloc_type *type)
4086 dst = malloc(sizeof(*dst), type, M_NOWAIT);
4088 dst->bits = src->sadb_key_bits;
4089 dst->key_data = malloc(len, type, M_NOWAIT);
4090 if (dst->key_data != NULL) {
4091 bcopy((const char *)(src + 1), dst->key_data, len);
4093 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
4099 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
4105 /* Take a lifetime message (sadb_lifetime) passed in on a socket and
4106 * turn it into one of the kernel's lifetime structures (seclifetime).
4108 * IN: pointer to the destination, source and malloc type
4109 * OUT: NULL, no more memory
4112 static struct seclifetime *
4113 key_dup_lifemsg(const struct sadb_lifetime *src, struct malloc_type *type)
4115 struct seclifetime *dst;
4117 dst = malloc(sizeof(*dst), type, M_NOWAIT);
4119 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
4122 dst->allocations = src->sadb_lifetime_allocations;
4123 dst->bytes = src->sadb_lifetime_bytes;
4124 dst->addtime = src->sadb_lifetime_addtime;
4125 dst->usetime = src->sadb_lifetime_usetime;
4130 * compare two secasindex structure.
4131 * flag can specify to compare 2 saidxes.
4132 * compare two secasindex structure without both mode and reqid.
4133 * don't compare port.
4135 * saidx0: source, it can be in SAD.
4142 key_cmpsaidx(const struct secasindex *saidx0, const struct secasindex *saidx1,
4147 if (saidx0 == NULL && saidx1 == NULL)
4150 if (saidx0 == NULL || saidx1 == NULL)
4153 if (saidx0->proto != saidx1->proto)
4156 if (flag == CMP_EXACTLY) {
4157 if (saidx0->mode != saidx1->mode)
4159 if (saidx0->reqid != saidx1->reqid)
4161 if (bcmp(&saidx0->src, &saidx1->src,
4162 saidx0->src.sa.sa_len) != 0 ||
4163 bcmp(&saidx0->dst, &saidx1->dst,
4164 saidx0->dst.sa.sa_len) != 0)
4167 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
4168 if (flag == CMP_MODE_REQID || flag == CMP_REQID) {
4170 * If reqid of SPD is non-zero, unique SA is required.
4171 * The result must be of same reqid in this case.
4173 if (saidx1->reqid != 0 &&
4174 saidx0->reqid != saidx1->reqid)
4178 if (flag == CMP_MODE_REQID) {
4179 if (saidx0->mode != IPSEC_MODE_ANY
4180 && saidx0->mode != saidx1->mode)
4184 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0)
4186 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0)
4194 * compare two secindex structure exactly.
4196 * spidx0: source, it is often in SPD.
4197 * spidx1: object, it is often from PFKEY message.
4203 key_cmpspidx_exactly(struct secpolicyindex *spidx0,
4204 struct secpolicyindex *spidx1)
4207 if (spidx0 == NULL && spidx1 == NULL)
4210 if (spidx0 == NULL || spidx1 == NULL)
4213 if (spidx0->prefs != spidx1->prefs
4214 || spidx0->prefd != spidx1->prefd
4215 || spidx0->ul_proto != spidx1->ul_proto
4216 || spidx0->dir != spidx1->dir)
4219 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
4220 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
4224 * compare two secindex structure with mask.
4226 * spidx0: source, it is often in SPD.
4227 * spidx1: object, it is often from IP header.
4233 key_cmpspidx_withmask(struct secpolicyindex *spidx0,
4234 struct secpolicyindex *spidx1)
4237 if (spidx0 == NULL && spidx1 == NULL)
4240 if (spidx0 == NULL || spidx1 == NULL)
4243 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
4244 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
4245 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
4246 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
4249 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
4250 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
4251 && spidx0->ul_proto != spidx1->ul_proto)
4254 switch (spidx0->src.sa.sa_family) {
4256 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
4257 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
4259 if (!key_bbcmp(&spidx0->src.sin.sin_addr,
4260 &spidx1->src.sin.sin_addr, spidx0->prefs))
4264 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
4265 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
4268 * scope_id check. if sin6_scope_id is 0, we regard it
4269 * as a wildcard scope, which matches any scope zone ID.
4271 if (spidx0->src.sin6.sin6_scope_id &&
4272 spidx1->src.sin6.sin6_scope_id &&
4273 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
4275 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
4276 &spidx1->src.sin6.sin6_addr, spidx0->prefs))
4281 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
4286 switch (spidx0->dst.sa.sa_family) {
4288 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
4289 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
4291 if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
4292 &spidx1->dst.sin.sin_addr, spidx0->prefd))
4296 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
4297 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
4300 * scope_id check. if sin6_scope_id is 0, we regard it
4301 * as a wildcard scope, which matches any scope zone ID.
4303 if (spidx0->dst.sin6.sin6_scope_id &&
4304 spidx1->dst.sin6.sin6_scope_id &&
4305 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
4307 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
4308 &spidx1->dst.sin6.sin6_addr, spidx0->prefd))
4313 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
4318 /* XXX Do we check other field ? e.g. flowinfo */
4326 #define satosin(s) ((const struct sockaddr_in *)s)
4330 #define satosin6(s) ((const struct sockaddr_in6 *)s)
4331 /* returns 0 on match */
4333 key_sockaddrcmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
4336 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4339 switch (sa1->sa_family) {
4342 if (sa1->sa_len != sizeof(struct sockaddr_in))
4344 if (satosin(sa1)->sin_addr.s_addr !=
4345 satosin(sa2)->sin_addr.s_addr) {
4348 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4354 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4355 return 1; /*EINVAL*/
4356 if (satosin6(sa1)->sin6_scope_id !=
4357 satosin6(sa2)->sin6_scope_id) {
4360 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4361 &satosin6(sa2)->sin6_addr)) {
4365 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4371 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4379 /* returns 0 on match */
4381 key_sockaddrcmp_withmask(const struct sockaddr *sa1,
4382 const struct sockaddr *sa2, size_t mask)
4384 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4387 switch (sa1->sa_family) {
4390 return (!key_bbcmp(&satosin(sa1)->sin_addr,
4391 &satosin(sa2)->sin_addr, mask));
4395 if (satosin6(sa1)->sin6_scope_id !=
4396 satosin6(sa2)->sin6_scope_id)
4398 return (!key_bbcmp(&satosin6(sa1)->sin6_addr,
4399 &satosin6(sa2)->sin6_addr, mask));
4408 * compare two buffers with mask.
4412 * bits: Number of bits to compare
4418 key_bbcmp(const void *a1, const void *a2, u_int bits)
4420 const unsigned char *p1 = a1;
4421 const unsigned char *p2 = a2;
4423 /* XXX: This could be considerably faster if we compare a word
4424 * at a time, but it is complicated on LSB Endian machines */
4426 /* Handle null pointers */
4427 if (p1 == NULL || p2 == NULL)
4437 u_int8_t mask = ~((1<<(8-bits))-1);
4438 if ((*p1 & mask) != (*p2 & mask))
4441 return 1; /* Match! */
4445 key_flush_spd(time_t now)
4447 SPTREE_RLOCK_TRACKER;
4448 struct secpolicy_list drainq;
4449 struct secpolicy *sp, *nextsp;
4454 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4455 TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
4456 if (sp->lifetime == 0 && sp->validtime == 0)
4458 if ((sp->lifetime &&
4459 now - sp->created > sp->lifetime) ||
4461 now - sp->lastused > sp->validtime)) {
4462 /* Hold extra reference to send SPDEXPIRE */
4464 LIST_INSERT_HEAD(&drainq, sp, drainq);
4469 if (LIST_EMPTY(&drainq))
4473 sp = LIST_FIRST(&drainq);
4474 while (sp != NULL) {
4475 nextsp = LIST_NEXT(sp, drainq);
4476 /* Check that SP is still linked */
4477 if (sp->state != IPSEC_SPSTATE_ALIVE) {
4478 LIST_REMOVE(sp, drainq);
4479 key_freesp(&sp); /* release extra reference */
4483 TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain);
4485 LIST_REMOVE(sp, idhash);
4486 sp->state = IPSEC_SPSTATE_DEAD;
4491 if (SPDCACHE_ENABLED())
4494 sp = LIST_FIRST(&drainq);
4495 while (sp != NULL) {
4496 nextsp = LIST_NEXT(sp, drainq);
4498 key_freesp(&sp); /* release extra reference */
4499 key_freesp(&sp); /* release last reference */
4505 key_flush_sad(time_t now)
4507 SAHTREE_RLOCK_TRACKER;
4508 struct secashead_list emptyq;
4509 struct secasvar_list drainq, hexpireq, sexpireq, freeq;
4510 struct secashead *sah, *nextsah;
4511 struct secasvar *sav, *nextsav;
4513 SECASVAR_RLOCK_TRACKER;
4516 LIST_INIT(&hexpireq);
4517 LIST_INIT(&sexpireq);
4521 TAILQ_FOREACH(sah, &V_sahtree, chain) {
4522 /* Check for empty SAH */
4523 if (TAILQ_EMPTY(&sah->savtree_larval) &&
4524 TAILQ_EMPTY(&sah->savtree_alive)) {
4526 LIST_INSERT_HEAD(&emptyq, sah, drainq);
4529 /* Add all stale LARVAL SAs into drainq */
4530 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
4531 if (now - sav->created < V_key_larval_lifetime)
4534 LIST_INSERT_HEAD(&drainq, sav, drainq);
4536 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
4537 /* lifetimes aren't specified */
4538 if (sav->lft_h == NULL)
4540 SECASVAR_RLOCK(sav);
4542 * Check again with lock held, because it may
4543 * be updated by SADB_UPDATE.
4545 if (sav->lft_h == NULL) {
4546 SECASVAR_RUNLOCK(sav);
4551 * HARD lifetimes MUST take precedence over SOFT
4552 * lifetimes, meaning if the HARD and SOFT lifetimes
4553 * are the same, the HARD lifetime will appear on the
4556 /* check HARD lifetime */
4557 if ((sav->lft_h->addtime != 0 &&
4558 now - sav->created > sav->lft_h->addtime) ||
4559 (sav->lft_h->usetime != 0 && sav->firstused &&
4560 now - sav->firstused > sav->lft_h->usetime) ||
4561 (sav->lft_h->bytes != 0 && counter_u64_fetch(
4562 sav->lft_c_bytes) > sav->lft_h->bytes)) {
4563 SECASVAR_RUNLOCK(sav);
4565 LIST_INSERT_HEAD(&hexpireq, sav, drainq);
4568 /* check SOFT lifetime (only for MATURE SAs) */
4569 if (sav->state == SADB_SASTATE_MATURE && (
4570 (sav->lft_s->addtime != 0 &&
4571 now - sav->created > sav->lft_s->addtime) ||
4572 (sav->lft_s->usetime != 0 && sav->firstused &&
4573 now - sav->firstused > sav->lft_s->usetime) ||
4574 (sav->lft_s->bytes != 0 && counter_u64_fetch(
4575 sav->lft_c_bytes) > sav->lft_s->bytes) ||
4576 (!(sav->flags & SADB_X_SAFLAGS_ESN) &&
4577 (sav->replay != NULL) && (
4578 (sav->replay->count > UINT32_80PCT) ||
4579 (sav->replay->last > UINT32_80PCT))))) {
4580 SECASVAR_RUNLOCK(sav);
4582 LIST_INSERT_HEAD(&sexpireq, sav, drainq);
4585 SECASVAR_RUNLOCK(sav);
4590 if (LIST_EMPTY(&emptyq) && LIST_EMPTY(&drainq) &&
4591 LIST_EMPTY(&hexpireq) && LIST_EMPTY(&sexpireq))
4596 /* Unlink stale LARVAL SAs */
4597 sav = LIST_FIRST(&drainq);
4598 while (sav != NULL) {
4599 nextsav = LIST_NEXT(sav, drainq);
4600 /* Check that SA is still LARVAL */
4601 if (sav->state != SADB_SASTATE_LARVAL) {
4602 LIST_REMOVE(sav, drainq);
4603 LIST_INSERT_HEAD(&freeq, sav, drainq);
4607 TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain);
4608 LIST_REMOVE(sav, spihash);
4609 sav->state = SADB_SASTATE_DEAD;
4612 /* Unlink all SAs with expired HARD lifetime */
4613 sav = LIST_FIRST(&hexpireq);
4614 while (sav != NULL) {
4615 nextsav = LIST_NEXT(sav, drainq);
4616 /* Check that SA is not unlinked */
4617 if (sav->state == SADB_SASTATE_DEAD) {
4618 LIST_REMOVE(sav, drainq);
4619 LIST_INSERT_HEAD(&freeq, sav, drainq);
4623 TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain);
4624 LIST_REMOVE(sav, spihash);
4625 sav->state = SADB_SASTATE_DEAD;
4628 /* Mark all SAs with expired SOFT lifetime as DYING */
4629 sav = LIST_FIRST(&sexpireq);
4630 while (sav != NULL) {
4631 nextsav = LIST_NEXT(sav, drainq);
4632 /* Check that SA is not unlinked */
4633 if (sav->state == SADB_SASTATE_DEAD) {
4634 LIST_REMOVE(sav, drainq);
4635 LIST_INSERT_HEAD(&freeq, sav, drainq);
4640 * NOTE: this doesn't change SA order in the chain.
4642 sav->state = SADB_SASTATE_DYING;
4645 /* Unlink empty SAHs */
4646 sah = LIST_FIRST(&emptyq);
4647 while (sah != NULL) {
4648 nextsah = LIST_NEXT(sah, drainq);
4649 /* Check that SAH is still empty and not unlinked */
4650 if (sah->state == SADB_SASTATE_DEAD ||
4651 !TAILQ_EMPTY(&sah->savtree_larval) ||
4652 !TAILQ_EMPTY(&sah->savtree_alive)) {
4653 LIST_REMOVE(sah, drainq);
4654 key_freesah(&sah); /* release extra reference */
4658 TAILQ_REMOVE(&V_sahtree, sah, chain);
4659 LIST_REMOVE(sah, addrhash);
4660 sah->state = SADB_SASTATE_DEAD;
4665 /* Send SPDEXPIRE messages */
4666 sav = LIST_FIRST(&hexpireq);
4667 while (sav != NULL) {
4668 nextsav = LIST_NEXT(sav, drainq);
4670 key_freesah(&sav->sah); /* release reference from SAV */
4671 key_freesav(&sav); /* release extra reference */
4672 key_freesav(&sav); /* release last reference */
4675 sav = LIST_FIRST(&sexpireq);
4676 while (sav != NULL) {
4677 nextsav = LIST_NEXT(sav, drainq);
4679 key_freesav(&sav); /* release extra reference */
4682 /* Free stale LARVAL SAs */
4683 sav = LIST_FIRST(&drainq);
4684 while (sav != NULL) {
4685 nextsav = LIST_NEXT(sav, drainq);
4686 key_freesah(&sav->sah); /* release reference from SAV */
4687 key_freesav(&sav); /* release extra reference */
4688 key_freesav(&sav); /* release last reference */
4691 /* Free SAs that were unlinked/changed by someone else */
4692 sav = LIST_FIRST(&freeq);
4693 while (sav != NULL) {
4694 nextsav = LIST_NEXT(sav, drainq);
4695 key_freesav(&sav); /* release extra reference */
4698 /* Free empty SAH */
4699 sah = LIST_FIRST(&emptyq);
4700 while (sah != NULL) {
4701 nextsah = LIST_NEXT(sah, drainq);
4702 key_freesah(&sah); /* release extra reference */
4703 key_freesah(&sah); /* release last reference */
4709 key_flush_acq(time_t now)
4711 struct secacq *acq, *nextacq;
4715 acq = LIST_FIRST(&V_acqtree);
4716 while (acq != NULL) {
4717 nextacq = LIST_NEXT(acq, chain);
4718 if (now - acq->created > V_key_blockacq_lifetime) {
4719 LIST_REMOVE(acq, chain);
4720 LIST_REMOVE(acq, addrhash);
4721 LIST_REMOVE(acq, seqhash);
4722 free(acq, M_IPSEC_SAQ);
4730 key_flush_spacq(time_t now)
4732 struct secspacq *acq, *nextacq;
4736 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) {
4737 nextacq = LIST_NEXT(acq, chain);
4738 if (now - acq->created > V_key_blockacq_lifetime
4739 && __LIST_CHAINED(acq)) {
4740 LIST_REMOVE(acq, chain);
4741 free(acq, M_IPSEC_SAQ);
4749 * scanning SPD and SAD to check status for each entries,
4750 * and do to remove or to expire.
4751 * XXX: year 2038 problem may remain.
4754 key_timehandler(void *arg)
4756 VNET_ITERATOR_DECL(vnet_iter);
4757 time_t now = time_second;
4759 VNET_LIST_RLOCK_NOSLEEP();
4760 VNET_FOREACH(vnet_iter) {
4761 CURVNET_SET(vnet_iter);
4765 key_flush_spacq(now);
4768 VNET_LIST_RUNLOCK_NOSLEEP();
4770 #ifndef IPSEC_DEBUG2
4771 /* do exchange to tick time !! */
4772 callout_schedule(&key_timer, hz);
4773 #endif /* IPSEC_DEBUG2 */
4781 arc4random_buf(&value, sizeof(value));
4786 * map SADB_SATYPE_* to IPPROTO_*.
4787 * if satype == SADB_SATYPE then satype is mapped to ~0.
4789 * 0: invalid satype.
4792 key_satype2proto(uint8_t satype)
4795 case SADB_SATYPE_UNSPEC:
4796 return IPSEC_PROTO_ANY;
4797 case SADB_SATYPE_AH:
4799 case SADB_SATYPE_ESP:
4801 case SADB_X_SATYPE_IPCOMP:
4802 return IPPROTO_IPCOMP;
4803 case SADB_X_SATYPE_TCPSIGNATURE:
4812 * map IPPROTO_* to SADB_SATYPE_*
4814 * 0: invalid protocol type.
4817 key_proto2satype(uint8_t proto)
4821 return SADB_SATYPE_AH;
4823 return SADB_SATYPE_ESP;
4824 case IPPROTO_IPCOMP:
4825 return SADB_X_SATYPE_IPCOMP;
4827 return SADB_X_SATYPE_TCPSIGNATURE;
4836 * SADB_GETSPI processing is to receive
4837 * <base, (SA2), src address, dst address, (SPI range)>
4838 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4839 * tree with the status of LARVAL, and send
4840 * <base, SA(*), address(SD)>
4843 * IN: mhp: pointer to the pointer to each header.
4844 * OUT: NULL if fail.
4845 * other if success, return pointer to the message to send.
4848 key_getspi(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
4850 struct secasindex saidx;
4851 struct sadb_address *src0, *dst0;
4852 struct secasvar *sav;
4853 uint32_t reqid, spi;
4855 uint8_t mode, proto;
4857 IPSEC_ASSERT(so != NULL, ("null socket"));
4858 IPSEC_ASSERT(m != NULL, ("null mbuf"));
4859 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
4860 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
4862 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
4863 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST)
4864 #ifdef PFKEY_STRICT_CHECKS
4865 || SADB_CHECKHDR(mhp, SADB_EXT_SPIRANGE)
4868 ipseclog((LOG_DEBUG,
4869 "%s: invalid message: missing required header.\n",
4874 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
4875 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)
4876 #ifdef PFKEY_STRICT_CHECKS
4877 || SADB_CHECKLEN(mhp, SADB_EXT_SPIRANGE)
4880 ipseclog((LOG_DEBUG,
4881 "%s: invalid message: wrong header size.\n", __func__));
4885 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
4886 mode = IPSEC_MODE_ANY;
4889 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
4890 ipseclog((LOG_DEBUG,
4891 "%s: invalid message: wrong header size.\n",
4896 mode = ((struct sadb_x_sa2 *)
4897 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4898 reqid = ((struct sadb_x_sa2 *)
4899 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4902 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4903 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4905 /* map satype to proto */
4906 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4907 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
4912 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
4913 (struct sockaddr *)(dst0 + 1));
4915 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
4919 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4921 /* SPI allocation */
4923 spi = key_do_getnewspi(
4924 (struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], &saidx);
4927 * Requested SPI or SPI range is not available or
4934 sav = key_newsav(mhp, &saidx, spi, &error);
4939 if (sav->seq != 0) {
4942 * If the SADB_GETSPI message is in response to a
4943 * kernel-generated SADB_ACQUIRE, the sadb_msg_seq
4944 * MUST be the same as the SADB_ACQUIRE message.
4946 * XXXAE: However it doesn't definethe behaviour how to
4947 * check this and what to do if it doesn't match.
4948 * Also what we should do if it matches?
4950 * We can compare saidx used in SADB_ACQUIRE with saidx
4951 * used in SADB_GETSPI, but this probably can break
4952 * existing software. For now just warn if it doesn't match.
4954 * XXXAE: anyway it looks useless.
4956 key_acqdone(&saidx, sav->seq);
4959 printf("%s: SA(%p)\n", __func__, sav));
4960 KEYDBG(KEY_DATA, kdebug_secasv(sav));
4963 struct mbuf *n, *nn;
4964 struct sadb_sa *m_sa;
4965 struct sadb_msg *newmsg;
4968 /* create new sadb_msg to reply. */
4969 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4970 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4972 MGETHDR(n, M_NOWAIT, MT_DATA);
4974 if (!(MCLGET(n, M_NOWAIT))) {
4988 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4989 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4991 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4992 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4993 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4994 m_sa->sadb_sa_spi = spi; /* SPI is already in network byte order */
4995 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4997 IPSEC_ASSERT(off == len,
4998 ("length inconsistency (off %u len %u)", off, len));
5000 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
5001 SADB_EXT_ADDRESS_DST);
5008 if (n->m_len < sizeof(struct sadb_msg)) {
5009 n = m_pullup(n, sizeof(struct sadb_msg));
5011 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
5014 n->m_pkthdr.len = 0;
5015 for (nn = n; nn; nn = nn->m_next)
5016 n->m_pkthdr.len += nn->m_len;
5018 newmsg = mtod(n, struct sadb_msg *);
5019 newmsg->sadb_msg_seq = sav->seq;
5020 newmsg->sadb_msg_errno = 0;
5021 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5024 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5028 return (key_senderror(so, m, error));
5032 * allocating new SPI
5033 * called by key_getspi().
5036 * others: success, SPI in network byte order.
5039 key_do_getnewspi(struct sadb_spirange *spirange, struct secasindex *saidx)
5041 uint32_t min, max, newspi, t;
5044 SPI_ALLOC_LOCK_ASSERT();
5046 /* set spi range to allocate */
5047 if (spirange != NULL) {
5048 min = spirange->sadb_spirange_min;
5049 max = spirange->sadb_spirange_max;
5051 min = V_key_spi_minval;
5052 max = V_key_spi_maxval;
5054 /* IPCOMP needs 2-byte SPI */
5055 if (saidx->proto == IPPROTO_IPCOMP) {
5061 t = min; min = max; max = t;
5066 if (key_checkspidup(htonl(min))) {
5067 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n",
5078 limit = atomic_load_int(&V_key_spi_trycnt);
5079 /* when requesting to allocate spi ranged */
5080 for (tries = 0; tries < limit; tries++) {
5081 /* generate pseudo-random SPI value ranged. */
5082 newspi = min + (key_random() % (max - min + 1));
5083 if (!key_checkspidup(htonl(newspi)))
5087 if (tries == limit || newspi == 0) {
5088 ipseclog((LOG_DEBUG,
5089 "%s: failed to allocate SPI.\n", __func__));
5095 keystat.getspi_count =
5096 (keystat.getspi_count + tries) / 2;
5098 return (htonl(newspi));
5102 * Find TCP-MD5 SA with corresponding secasindex.
5103 * If not found, return NULL and fill SPI with usable value if needed.
5105 static struct secasvar *
5106 key_getsav_tcpmd5(struct secasindex *saidx, uint32_t *spi)
5108 SAHTREE_RLOCK_TRACKER;
5109 struct secashead *sah;
5110 struct secasvar *sav;
5112 IPSEC_ASSERT(saidx->proto == IPPROTO_TCP, ("wrong proto"));
5114 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
5115 if (sah->saidx.proto != IPPROTO_TCP)
5117 if (!key_sockaddrcmp(&saidx->dst.sa, &sah->saidx.dst.sa, 0) &&
5118 !key_sockaddrcmp(&saidx->src.sa, &sah->saidx.src.sa, 0))
5122 if (V_key_preferred_oldsa)
5123 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
5125 sav = TAILQ_FIRST(&sah->savtree_alive);
5133 /* No SPI required */
5137 /* Check that SPI is unique */
5138 LIST_FOREACH(sav, SAVHASH_HASH(*spi), spihash) {
5139 if (sav->spi == *spi)
5144 /* SPI is already unique */
5148 /* XXX: not optimal */
5149 *spi = key_do_getnewspi(NULL, saidx);
5154 key_updateaddresses(struct socket *so, struct mbuf *m,
5155 const struct sadb_msghdr *mhp, struct secasvar *sav,
5156 struct secasindex *saidx)
5158 struct sockaddr *newaddr;
5159 struct secashead *sah;
5160 struct secasvar *newsav, *tmp;
5164 /* Check that we need to change SAH */
5165 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC)) {
5166 newaddr = (struct sockaddr *)(
5167 ((struct sadb_address *)
5168 mhp->ext[SADB_X_EXT_NEW_ADDRESS_SRC]) + 1);
5169 bcopy(newaddr, &saidx->src, newaddr->sa_len);
5170 key_porttosaddr(&saidx->src.sa, 0);
5172 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST)) {
5173 newaddr = (struct sockaddr *)(
5174 ((struct sadb_address *)
5175 mhp->ext[SADB_X_EXT_NEW_ADDRESS_DST]) + 1);
5176 bcopy(newaddr, &saidx->dst, newaddr->sa_len);
5177 key_porttosaddr(&saidx->dst.sa, 0);
5179 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC) ||
5180 !SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST)) {
5181 error = key_checksockaddrs(&saidx->src.sa, &saidx->dst.sa);
5183 ipseclog((LOG_DEBUG, "%s: invalid new sockaddr.\n",
5188 sah = key_getsah(saidx);
5190 /* create a new SA index */
5191 sah = key_newsah(saidx);
5193 ipseclog((LOG_DEBUG,
5194 "%s: No more memory.\n", __func__));
5197 isnew = 2; /* SAH is new */
5199 isnew = 1; /* existing SAH is referenced */
5202 * src and dst addresses are still the same.
5203 * Do we want to change NAT-T config?
5205 if (sav->sah->saidx.proto != IPPROTO_ESP ||
5206 SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) ||
5207 SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) ||
5208 SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) {
5209 ipseclog((LOG_DEBUG,
5210 "%s: invalid message: missing required header.\n",
5214 /* We hold reference to SA, thus SAH will be referenced too. */
5219 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA,
5221 if (newsav == NULL) {
5222 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5227 /* Clone SA's content into newsav */
5228 SAV_INITREF(newsav);
5229 bcopy(sav, newsav, offsetof(struct secasvar, chain));
5231 * We create new NAT-T config if it is needed.
5232 * Old NAT-T config will be freed by key_cleansav() when
5233 * last reference to SA will be released.
5235 newsav->natt = NULL;
5237 newsav->state = SADB_SASTATE_MATURE;
5238 error = key_setnatt(newsav, mhp);
5243 /* Check that SA is still alive */
5244 if (sav->state == SADB_SASTATE_DEAD) {
5245 /* SA was unlinked */
5251 /* Unlink SA from SAH and SPI hash */
5252 IPSEC_ASSERT((sav->flags & SADB_X_EXT_F_CLONED) == 0,
5253 ("SA is already cloned"));
5254 IPSEC_ASSERT(sav->state == SADB_SASTATE_MATURE ||
5255 sav->state == SADB_SASTATE_DYING,
5256 ("Wrong SA state %u\n", sav->state));
5257 TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain);
5258 LIST_REMOVE(sav, spihash);
5259 sav->state = SADB_SASTATE_DEAD;
5262 * Link new SA with SAH. Keep SAs ordered by
5263 * create time (newer are first).
5265 TAILQ_FOREACH(tmp, &sah->savtree_alive, chain) {
5266 if (newsav->created > tmp->created) {
5267 TAILQ_INSERT_BEFORE(tmp, newsav, chain);
5272 TAILQ_INSERT_TAIL(&sah->savtree_alive, newsav, chain);
5274 /* Add new SA into SPI hash. */
5275 LIST_INSERT_HEAD(SAVHASH_HASH(newsav->spi), newsav, spihash);
5277 /* Add new SAH into SADB. */
5279 TAILQ_INSERT_HEAD(&V_sahtree, sah, chain);
5280 LIST_INSERT_HEAD(SAHADDRHASH_HASH(saidx), sah, addrhash);
5281 sah->state = SADB_SASTATE_MATURE;
5282 SAH_ADDREF(sah); /* newsav references new SAH */
5285 * isnew == 1 -> @sah was referenced by key_getsah().
5286 * isnew == 0 -> we use the same @sah, that was used by @sav,
5287 * and we use its reference for @newsav.
5289 SECASVAR_WLOCK(sav);
5290 /* XXX: replace cntr with pointer? */
5291 newsav->cntr = sav->cntr;
5292 sav->flags |= SADB_X_EXT_F_CLONED;
5293 SECASVAR_WUNLOCK(sav);
5298 printf("%s: SA(%p) cloned into SA(%p)\n",
5299 __func__, sav, newsav));
5300 KEYDBG(KEY_DATA, kdebug_secasv(newsav));
5302 key_freesav(&sav); /* release last reference */
5304 /* set msg buf from mhp */
5305 n = key_getmsgbuf_x1(m, mhp);
5307 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5311 key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5316 if (newsav != NULL) {
5317 if (newsav->natt != NULL)
5318 free(newsav->natt, M_IPSEC_MISC);
5319 free(newsav, M_IPSEC_SA);
5325 * SADB_UPDATE processing
5327 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5328 * key(AE), (identity(SD),) (sensitivity)>
5329 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
5331 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5332 * (identity(SD),) (sensitivity)>
5335 * m will always be freed.
5338 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5340 struct secasindex saidx;
5341 struct sadb_address *src0, *dst0;
5342 struct sadb_sa *sa0;
5343 struct secasvar *sav;
5346 uint8_t mode, proto;
5348 IPSEC_ASSERT(so != NULL, ("null socket"));
5349 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5350 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5351 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5353 /* map satype to proto */
5354 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5355 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5357 return key_senderror(so, m, EINVAL);
5360 if (SADB_CHECKHDR(mhp, SADB_EXT_SA) ||
5361 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
5362 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
5363 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
5364 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) ||
5365 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) &&
5366 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) {
5367 ipseclog((LOG_DEBUG,
5368 "%s: invalid message: missing required header.\n",
5370 return key_senderror(so, m, EINVAL);
5372 if (SADB_CHECKLEN(mhp, SADB_EXT_SA) ||
5373 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
5374 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
5375 ipseclog((LOG_DEBUG,
5376 "%s: invalid message: wrong header size.\n", __func__));
5377 return key_senderror(so, m, EINVAL);
5379 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
5380 mode = IPSEC_MODE_ANY;
5383 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
5384 ipseclog((LOG_DEBUG,
5385 "%s: invalid message: wrong header size.\n",
5387 return key_senderror(so, m, EINVAL);
5389 mode = ((struct sadb_x_sa2 *)
5390 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5391 reqid = ((struct sadb_x_sa2 *)
5392 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5395 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5396 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5397 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5400 * Only SADB_SASTATE_MATURE SAs may be submitted in an
5401 * SADB_UPDATE message.
5403 if (sa0->sadb_sa_state != SADB_SASTATE_MATURE) {
5404 ipseclog((LOG_DEBUG, "%s: invalid state.\n", __func__));
5405 #ifdef PFKEY_STRICT_CHECKS
5406 return key_senderror(so, m, EINVAL);
5409 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
5410 (struct sockaddr *)(dst0 + 1));
5412 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
5413 return key_senderror(so, m, error);
5415 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5416 sav = key_getsavbyspi(sa0->sadb_sa_spi);
5418 ipseclog((LOG_DEBUG, "%s: no SA found for SPI %u\n",
5419 __func__, ntohl(sa0->sadb_sa_spi)));
5420 return key_senderror(so, m, EINVAL);
5423 * Check that SADB_UPDATE issued by the same process that did
5424 * SADB_GETSPI or SADB_ADD.
5426 if (sav->pid != mhp->msg->sadb_msg_pid) {
5427 ipseclog((LOG_DEBUG,
5428 "%s: pid mismatched (SPI %u, pid %u vs. %u)\n", __func__,
5429 ntohl(sav->spi), sav->pid, mhp->msg->sadb_msg_pid));
5431 return key_senderror(so, m, EINVAL);
5433 /* saidx should match with SA. */
5434 if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_MODE_REQID) == 0) {
5435 ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u\n",
5436 __func__, ntohl(sav->spi)));
5438 return key_senderror(so, m, ESRCH);
5441 if (sav->state == SADB_SASTATE_LARVAL) {
5442 if ((mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
5443 SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT)) ||
5444 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
5445 SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH))) {
5446 ipseclog((LOG_DEBUG,
5447 "%s: invalid message: missing required header.\n",
5450 return key_senderror(so, m, EINVAL);
5453 * We can set any values except src, dst and SPI.
5455 error = key_setsaval(sav, mhp);
5458 return (key_senderror(so, m, error));
5460 /* Change SA state to MATURE */
5462 if (sav->state != SADB_SASTATE_LARVAL) {
5463 /* SA was deleted or another thread made it MATURE. */
5466 return (key_senderror(so, m, ESRCH));
5469 * NOTE: we keep SAs in savtree_alive ordered by created
5470 * time. When SA's state changed from LARVAL to MATURE,
5471 * we update its created time in key_setsaval() and move
5472 * it into head of savtree_alive.
5474 TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain);
5475 TAILQ_INSERT_HEAD(&sav->sah->savtree_alive, sav, chain);
5476 sav->state = SADB_SASTATE_MATURE;
5480 * For DYING and MATURE SA we can change only state
5481 * and lifetimes. Report EINVAL if something else attempted
5484 if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT) ||
5485 !SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH)) {
5487 return (key_senderror(so, m, EINVAL));
5489 error = key_updatelifetimes(sav, mhp);
5492 return (key_senderror(so, m, error));
5495 * This is FreeBSD extension to RFC2367.
5496 * IKEd can specify SADB_X_EXT_NEW_ADDRESS_SRC and/or
5497 * SADB_X_EXT_NEW_ADDRESS_DST when it wants to change
5498 * SA addresses (for example to implement MOBIKE protocol
5499 * as described in RFC4555). Also we allow to change
5502 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC) ||
5503 !SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST) ||
5504 !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) ||
5505 sav->natt != NULL) {
5506 error = key_updateaddresses(so, m, mhp, sav, &saidx);
5509 return (key_senderror(so, m, error));
5512 /* Check that SA is still alive */
5514 if (sav->state == SADB_SASTATE_DEAD) {
5515 /* SA was unlinked */
5518 return (key_senderror(so, m, ESRCH));
5521 * NOTE: there is possible state moving from DYING to MATURE,
5522 * but this doesn't change created time, so we won't reorder
5525 sav->state = SADB_SASTATE_MATURE;
5529 printf("%s: SA(%p)\n", __func__, sav));
5530 KEYDBG(KEY_DATA, kdebug_secasv(sav));
5536 /* set msg buf from mhp */
5537 n = key_getmsgbuf_x1(m, mhp);
5539 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5540 return key_senderror(so, m, ENOBUFS);
5544 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5549 * SADB_ADD processing
5550 * add an entry to SA database, when received
5551 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5552 * key(AE), (identity(SD),) (sensitivity)>
5555 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5556 * (identity(SD),) (sensitivity)>
5559 * IGNORE identity and sensitivity messages.
5561 * m will always be freed.
5564 key_add(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5566 struct secasindex saidx;
5567 struct sadb_address *src0, *dst0;
5568 struct sadb_sa *sa0;
5569 struct secasvar *sav;
5570 uint32_t reqid, spi;
5571 uint8_t mode, proto;
5574 IPSEC_ASSERT(so != NULL, ("null socket"));
5575 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5576 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5577 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5579 /* map satype to proto */
5580 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5581 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5583 return key_senderror(so, m, EINVAL);
5586 if (SADB_CHECKHDR(mhp, SADB_EXT_SA) ||
5587 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
5588 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
5589 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && (
5590 SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT) ||
5591 SADB_CHECKLEN(mhp, SADB_EXT_KEY_ENCRYPT))) ||
5592 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && (
5593 SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH) ||
5594 SADB_CHECKLEN(mhp, SADB_EXT_KEY_AUTH))) ||
5595 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
5596 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) ||
5597 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) &&
5598 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) {
5599 ipseclog((LOG_DEBUG,
5600 "%s: invalid message: missing required header.\n",
5602 return key_senderror(so, m, EINVAL);
5604 if (SADB_CHECKLEN(mhp, SADB_EXT_SA) ||
5605 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
5606 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
5607 ipseclog((LOG_DEBUG,
5608 "%s: invalid message: wrong header size.\n", __func__));
5609 return key_senderror(so, m, EINVAL);
5611 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
5612 mode = IPSEC_MODE_ANY;
5615 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
5616 ipseclog((LOG_DEBUG,
5617 "%s: invalid message: wrong header size.\n",
5619 return key_senderror(so, m, EINVAL);
5621 mode = ((struct sadb_x_sa2 *)
5622 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5623 reqid = ((struct sadb_x_sa2 *)
5624 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5627 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5628 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5629 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5632 * Only SADB_SASTATE_MATURE SAs may be submitted in an
5635 if (sa0->sadb_sa_state != SADB_SASTATE_MATURE) {
5636 ipseclog((LOG_DEBUG, "%s: invalid state.\n", __func__));
5637 #ifdef PFKEY_STRICT_CHECKS
5638 return key_senderror(so, m, EINVAL);
5641 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
5642 (struct sockaddr *)(dst0 + 1));
5644 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
5645 return key_senderror(so, m, error);
5647 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5648 spi = sa0->sadb_sa_spi;
5650 * For TCP-MD5 SAs we don't use SPI. Check the uniqueness using
5652 * XXXAE: IPComp seems also doesn't use SPI.
5655 if (proto == IPPROTO_TCP) {
5656 sav = key_getsav_tcpmd5(&saidx, &spi);
5657 if (sav == NULL && spi == 0) {
5659 /* Failed to allocate SPI */
5660 ipseclog((LOG_DEBUG, "%s: SA already exists.\n",
5662 return key_senderror(so, m, EEXIST);
5664 /* XXX: SPI that we report back can have another value */
5666 /* We can create new SA only if SPI is different. */
5667 sav = key_getsavbyspi(spi);
5672 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__));
5673 return key_senderror(so, m, EEXIST);
5676 sav = key_newsav(mhp, &saidx, spi, &error);
5679 return key_senderror(so, m, error);
5681 printf("%s: return SA(%p)\n", __func__, sav));
5682 KEYDBG(KEY_DATA, kdebug_secasv(sav));
5684 * If SADB_ADD was in response to SADB_ACQUIRE, we need to schedule
5688 key_acqdone(&saidx, sav->seq);
5692 * Don't call key_freesav() on error here, as we would like to
5693 * keep the SA in the database.
5697 /* set msg buf from mhp */
5698 n = key_getmsgbuf_x1(m, mhp);
5700 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5701 return key_senderror(so, m, ENOBUFS);
5705 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5711 * IKEd may request the use ESP in UDP encapsulation when it detects the
5712 * presence of NAT. It uses NAT-T extension headers for such SAs to specify
5713 * parameters needed for encapsulation and decapsulation. These PF_KEY
5714 * extension headers are not standardized, so this comment addresses our
5716 * SADB_X_EXT_NAT_T_TYPE specifies type of encapsulation, we support only
5717 * UDP_ENCAP_ESPINUDP as described in RFC3948.
5718 * SADB_X_EXT_NAT_T_SPORT/DPORT specifies source and destination ports for
5719 * UDP header. We use these ports in UDP encapsulation procedure, also we
5720 * can check them in UDP decapsulation procedure.
5721 * SADB_X_EXT_NAT_T_OA[IR] specifies original address of initiator or
5722 * responder. These addresses can be used for transport mode to adjust
5723 * checksum after decapsulation and decryption. Since original IP addresses
5724 * used by peer usually different (we detected presence of NAT), TCP/UDP
5725 * pseudo header checksum and IP header checksum was calculated using original
5726 * addresses. After decapsulation and decryption we need to adjust checksum
5727 * to have correct datagram.
5729 * We expect presence of NAT-T extension headers only in SADB_ADD and
5730 * SADB_UPDATE messages. We report NAT-T extension headers in replies
5731 * to SADB_ADD, SADB_UPDATE, SADB_GET, and SADB_DUMP messages.
5734 key_setnatt(struct secasvar *sav, const struct sadb_msghdr *mhp)
5736 struct sadb_x_nat_t_port *port;
5737 struct sadb_x_nat_t_type *type;
5738 struct sadb_address *oai, *oar;
5739 struct sockaddr *sa;
5743 IPSEC_ASSERT(sav->natt == NULL, ("natt is already initialized"));
5745 * Ignore NAT-T headers if sproto isn't ESP.
5747 if (sav->sah->saidx.proto != IPPROTO_ESP)
5750 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) &&
5751 !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) &&
5752 !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) {
5753 if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_TYPE) ||
5754 SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_SPORT) ||
5755 SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_DPORT)) {
5756 ipseclog((LOG_DEBUG,
5757 "%s: invalid message: wrong header size.\n",
5764 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE];
5765 if (type->sadb_x_nat_t_type_type != UDP_ENCAP_ESPINUDP) {
5766 ipseclog((LOG_DEBUG, "%s: unsupported NAT-T type %u.\n",
5767 __func__, type->sadb_x_nat_t_type_type));
5771 * Allocate storage for NAT-T config.
5772 * On error it will be released by key_cleansav().
5774 sav->natt = malloc(sizeof(struct secnatt), M_IPSEC_MISC,
5776 if (sav->natt == NULL) {
5777 PFKEYSTAT_INC(in_nomem);
5778 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5781 port = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5782 if (port->sadb_x_nat_t_port_port == 0) {
5783 ipseclog((LOG_DEBUG, "%s: invalid NAT-T sport specified.\n",
5787 sav->natt->sport = port->sadb_x_nat_t_port_port;
5788 port = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5789 if (port->sadb_x_nat_t_port_port == 0) {
5790 ipseclog((LOG_DEBUG, "%s: invalid NAT-T dport specified.\n",
5794 sav->natt->dport = port->sadb_x_nat_t_port_port;
5797 * SADB_X_EXT_NAT_T_OAI and SADB_X_EXT_NAT_T_OAR are optional
5798 * and needed only for transport mode IPsec.
5799 * Usually NAT translates only one address, but it is possible,
5800 * that both addresses could be translated.
5801 * NOTE: Value of SADB_X_EXT_NAT_T_OAI is equal to SADB_X_EXT_NAT_T_OA.
5803 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAI)) {
5804 if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAI)) {
5805 ipseclog((LOG_DEBUG,
5806 "%s: invalid message: wrong header size.\n",
5810 oai = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI];
5813 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAR)) {
5814 if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAR)) {
5815 ipseclog((LOG_DEBUG,
5816 "%s: invalid message: wrong header size.\n",
5820 oar = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR];
5824 /* Initialize addresses only for transport mode */
5825 if (sav->sah->saidx.mode != IPSEC_MODE_TUNNEL) {
5828 /* Currently we support only AF_INET */
5829 sa = (struct sockaddr *)(oai + 1);
5830 if (sa->sa_family != AF_INET ||
5831 sa->sa_len != sizeof(struct sockaddr_in)) {
5832 ipseclog((LOG_DEBUG,
5833 "%s: wrong NAT-OAi header.\n",
5837 /* Ignore address if it the same */
5838 if (((struct sockaddr_in *)sa)->sin_addr.s_addr !=
5839 sav->sah->saidx.src.sin.sin_addr.s_addr) {
5840 bcopy(sa, &sav->natt->oai.sa, sa->sa_len);
5841 sav->natt->flags |= IPSEC_NATT_F_OAI;
5842 /* Calculate checksum delta */
5843 addr = sav->sah->saidx.src.sin.sin_addr.s_addr;
5844 cksum = in_addword(cksum, ~addr >> 16);
5845 cksum = in_addword(cksum, ~addr & 0xffff);
5846 addr = sav->natt->oai.sin.sin_addr.s_addr;
5847 cksum = in_addword(cksum, addr >> 16);
5848 cksum = in_addword(cksum, addr & 0xffff);
5852 /* Currently we support only AF_INET */
5853 sa = (struct sockaddr *)(oar + 1);
5854 if (sa->sa_family != AF_INET ||
5855 sa->sa_len != sizeof(struct sockaddr_in)) {
5856 ipseclog((LOG_DEBUG,
5857 "%s: wrong NAT-OAr header.\n",
5861 /* Ignore address if it the same */
5862 if (((struct sockaddr_in *)sa)->sin_addr.s_addr !=
5863 sav->sah->saidx.dst.sin.sin_addr.s_addr) {
5864 bcopy(sa, &sav->natt->oar.sa, sa->sa_len);
5865 sav->natt->flags |= IPSEC_NATT_F_OAR;
5866 /* Calculate checksum delta */
5867 addr = sav->sah->saidx.dst.sin.sin_addr.s_addr;
5868 cksum = in_addword(cksum, ~addr >> 16);
5869 cksum = in_addword(cksum, ~addr & 0xffff);
5870 addr = sav->natt->oar.sin.sin_addr.s_addr;
5871 cksum = in_addword(cksum, addr >> 16);
5872 cksum = in_addword(cksum, addr & 0xffff);
5875 sav->natt->cksum = cksum;
5881 key_setident(struct secashead *sah, const struct sadb_msghdr *mhp)
5883 const struct sadb_ident *idsrc, *iddst;
5885 IPSEC_ASSERT(sah != NULL, ("null secashead"));
5886 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5887 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5889 /* don't make buffer if not there */
5890 if (SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_SRC) &&
5891 SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_DST)) {
5897 if (SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_SRC) ||
5898 SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_DST)) {
5899 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__));
5903 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5904 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5906 /* validity check */
5907 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5908 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__));
5912 switch (idsrc->sadb_ident_type) {
5913 case SADB_IDENTTYPE_PREFIX:
5914 case SADB_IDENTTYPE_FQDN:
5915 case SADB_IDENTTYPE_USERFQDN:
5917 /* XXX do nothing */
5923 /* make structure */
5924 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
5925 if (sah->idents == NULL) {
5926 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5929 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
5930 if (sah->identd == NULL) {
5931 free(sah->idents, M_IPSEC_MISC);
5933 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5936 sah->idents->type = idsrc->sadb_ident_type;
5937 sah->idents->id = idsrc->sadb_ident_id;
5939 sah->identd->type = iddst->sadb_ident_type;
5940 sah->identd->id = iddst->sadb_ident_id;
5946 * m will not be freed on return.
5947 * it is caller's responsibility to free the result.
5949 * Called from SADB_ADD and SADB_UPDATE. Reply will contain headers
5950 * from the request in defined order.
5952 static struct mbuf *
5953 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5957 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5958 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5959 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5961 /* create new sadb_msg to reply. */
5962 n = key_gather_mbuf(m, mhp, 1, 16, SADB_EXT_RESERVED,
5963 SADB_EXT_SA, SADB_X_EXT_SA2,
5964 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5965 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5966 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST,
5967 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT,
5968 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI,
5969 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NEW_ADDRESS_SRC,
5970 SADB_X_EXT_NEW_ADDRESS_DST);
5974 if (n->m_len < sizeof(struct sadb_msg)) {
5975 n = m_pullup(n, sizeof(struct sadb_msg));
5979 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5980 mtod(n, struct sadb_msg *)->sadb_msg_len =
5981 PFKEY_UNIT64(n->m_pkthdr.len);
5987 * SADB_DELETE processing
5989 * <base, SA(*), address(SD)>
5990 * from the ikmpd, and set SADB_SASTATE_DEAD,
5992 * <base, SA(*), address(SD)>
5995 * m will always be freed.
5998 key_delete(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
6000 struct secasindex saidx;
6001 struct sadb_address *src0, *dst0;
6002 struct secasvar *sav;
6003 struct sadb_sa *sa0;
6006 IPSEC_ASSERT(so != NULL, ("null socket"));
6007 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6008 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6009 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6011 /* map satype to proto */
6012 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6013 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
6015 return key_senderror(so, m, EINVAL);
6018 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
6019 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
6020 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
6021 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
6022 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
6024 return key_senderror(so, m, EINVAL);
6027 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
6028 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
6030 if (key_checksockaddrs((struct sockaddr *)(src0 + 1),
6031 (struct sockaddr *)(dst0 + 1)) != 0) {
6032 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
6033 return (key_senderror(so, m, EINVAL));
6035 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6036 if (SADB_CHECKHDR(mhp, SADB_EXT_SA)) {
6038 * Caller wants us to delete all non-LARVAL SAs
6039 * that match the src/dst. This is used during
6040 * IKE INITIAL-CONTACT.
6041 * XXXAE: this looks like some extension to RFC2367.
6043 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__));
6044 return (key_delete_all(so, m, mhp, &saidx));
6046 if (SADB_CHECKLEN(mhp, SADB_EXT_SA)) {
6047 ipseclog((LOG_DEBUG,
6048 "%s: invalid message: wrong header size.\n", __func__));
6049 return (key_senderror(so, m, EINVAL));
6051 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
6053 if (proto == IPPROTO_TCP)
6054 sav = key_getsav_tcpmd5(&saidx, NULL);
6056 sav = key_getsavbyspi(sa0->sadb_sa_spi);
6059 ipseclog((LOG_DEBUG, "%s: no SA found for SPI %u.\n",
6060 __func__, ntohl(sa0->sadb_sa_spi)));
6061 return (key_senderror(so, m, ESRCH));
6063 if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_HEAD) == 0) {
6064 ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u.\n",
6065 __func__, ntohl(sav->spi)));
6067 return (key_senderror(so, m, ESRCH));
6070 printf("%s: SA(%p)\n", __func__, sav));
6071 KEYDBG(KEY_DATA, kdebug_secasv(sav));
6077 struct sadb_msg *newmsg;
6079 /* create new sadb_msg to reply. */
6080 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
6081 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
6083 return key_senderror(so, m, ENOBUFS);
6085 if (n->m_len < sizeof(struct sadb_msg)) {
6086 n = m_pullup(n, sizeof(struct sadb_msg));
6088 return key_senderror(so, m, ENOBUFS);
6090 newmsg = mtod(n, struct sadb_msg *);
6091 newmsg->sadb_msg_errno = 0;
6092 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
6095 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
6100 * delete all SAs for src/dst. Called from key_delete().
6103 key_delete_all(struct socket *so, struct mbuf *m,
6104 const struct sadb_msghdr *mhp, struct secasindex *saidx)
6106 struct secasvar_queue drainq;
6107 struct secashead *sah;
6108 struct secasvar *sav, *nextsav;
6110 TAILQ_INIT(&drainq);
6112 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
6113 if (key_cmpsaidx(&sah->saidx, saidx, CMP_HEAD) == 0)
6115 /* Move all ALIVE SAs into drainq */
6116 TAILQ_CONCAT(&drainq, &sah->savtree_alive, chain);
6118 /* Unlink all queued SAs from SPI hash */
6119 TAILQ_FOREACH(sav, &drainq, chain) {
6120 sav->state = SADB_SASTATE_DEAD;
6121 LIST_REMOVE(sav, spihash);
6124 /* Now we can release reference for all SAs in drainq */
6125 sav = TAILQ_FIRST(&drainq);
6126 while (sav != NULL) {
6128 printf("%s: SA(%p)\n", __func__, sav));
6129 KEYDBG(KEY_DATA, kdebug_secasv(sav));
6130 nextsav = TAILQ_NEXT(sav, chain);
6131 key_freesah(&sav->sah); /* release reference from SAV */
6132 key_freesav(&sav); /* release last reference */
6138 struct sadb_msg *newmsg;
6140 /* create new sadb_msg to reply. */
6141 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
6142 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
6144 return key_senderror(so, m, ENOBUFS);
6146 if (n->m_len < sizeof(struct sadb_msg)) {
6147 n = m_pullup(n, sizeof(struct sadb_msg));
6149 return key_senderror(so, m, ENOBUFS);
6151 newmsg = mtod(n, struct sadb_msg *);
6152 newmsg->sadb_msg_errno = 0;
6153 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
6156 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
6161 * Delete all alive SAs for corresponding xform.
6162 * Larval SAs have not initialized tdb_xform, so it is safe to leave them
6163 * here when xform disappears.
6166 key_delete_xform(const struct xformsw *xsp)
6168 struct secasvar_queue drainq;
6169 struct secashead *sah;
6170 struct secasvar *sav, *nextsav;
6172 TAILQ_INIT(&drainq);
6174 TAILQ_FOREACH(sah, &V_sahtree, chain) {
6175 sav = TAILQ_FIRST(&sah->savtree_alive);
6178 if (sav->tdb_xform != xsp)
6181 * It is supposed that all SAs in the chain are related to
6184 TAILQ_CONCAT(&drainq, &sah->savtree_alive, chain);
6186 /* Unlink all queued SAs from SPI hash */
6187 TAILQ_FOREACH(sav, &drainq, chain) {
6188 sav->state = SADB_SASTATE_DEAD;
6189 LIST_REMOVE(sav, spihash);
6193 /* Now we can release reference for all SAs in drainq */
6194 sav = TAILQ_FIRST(&drainq);
6195 while (sav != NULL) {
6197 printf("%s: SA(%p)\n", __func__, sav));
6198 KEYDBG(KEY_DATA, kdebug_secasv(sav));
6199 nextsav = TAILQ_NEXT(sav, chain);
6200 key_freesah(&sav->sah); /* release reference from SAV */
6201 key_freesav(&sav); /* release last reference */
6207 * SADB_GET processing
6209 * <base, SA(*), address(SD)>
6210 * from the ikmpd, and get a SP and a SA to respond,
6212 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
6213 * (identity(SD),) (sensitivity)>
6216 * m will always be freed.
6219 key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
6221 struct secasindex saidx;
6222 struct sadb_address *src0, *dst0;
6223 struct sadb_sa *sa0;
6224 struct secasvar *sav;
6227 IPSEC_ASSERT(so != NULL, ("null socket"));
6228 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6229 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6230 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6232 /* map satype to proto */
6233 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6234 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
6236 return key_senderror(so, m, EINVAL);
6239 if (SADB_CHECKHDR(mhp, SADB_EXT_SA) ||
6240 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
6241 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST)) {
6242 ipseclog((LOG_DEBUG,
6243 "%s: invalid message: missing required header.\n",
6245 return key_senderror(so, m, EINVAL);
6247 if (SADB_CHECKLEN(mhp, SADB_EXT_SA) ||
6248 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
6249 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
6250 ipseclog((LOG_DEBUG,
6251 "%s: invalid message: wrong header size.\n", __func__));
6252 return key_senderror(so, m, EINVAL);
6255 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
6256 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6257 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6259 if (key_checksockaddrs((struct sockaddr *)(src0 + 1),
6260 (struct sockaddr *)(dst0 + 1)) != 0) {
6261 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
6262 return key_senderror(so, m, EINVAL);
6264 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6267 if (proto == IPPROTO_TCP)
6268 sav = key_getsav_tcpmd5(&saidx, NULL);
6270 sav = key_getsavbyspi(sa0->sadb_sa_spi);
6273 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__));
6274 return key_senderror(so, m, ESRCH);
6276 if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_HEAD) == 0) {
6277 ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u.\n",
6278 __func__, ntohl(sa0->sadb_sa_spi)));
6280 return (key_senderror(so, m, ESRCH));
6287 /* map proto to satype */
6288 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) {
6289 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n",
6292 return key_senderror(so, m, EINVAL);
6295 /* create new sadb_msg to reply. */
6296 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
6297 mhp->msg->sadb_msg_pid);
6301 return key_senderror(so, m, ENOBUFS);
6304 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6308 /* XXX make it sysctl-configurable? */
6310 key_getcomb_setlifetime(struct sadb_comb *comb)
6313 comb->sadb_comb_soft_allocations = 1;
6314 comb->sadb_comb_hard_allocations = 1;
6315 comb->sadb_comb_soft_bytes = 0;
6316 comb->sadb_comb_hard_bytes = 0;
6317 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
6318 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
6319 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
6320 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
6324 * XXX reorder combinations by preference
6325 * XXX no idea if the user wants ESP authentication or not
6327 static struct mbuf *
6328 key_getcomb_ealg(void)
6330 struct sadb_comb *comb;
6331 const struct enc_xform *algo;
6332 struct mbuf *result = NULL, *m, *n;
6336 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6339 for (i = 1; i <= SADB_EALG_MAX; i++) {
6340 algo = enc_algorithm_lookup(i);
6344 /* discard algorithms with key size smaller than system min */
6345 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin)
6347 if (_BITS(algo->minkey) < V_ipsec_esp_keymin)
6348 encmin = V_ipsec_esp_keymin;
6350 encmin = _BITS(algo->minkey);
6352 if (V_ipsec_esp_auth)
6353 m = key_getcomb_ah();
6355 IPSEC_ASSERT(l <= MLEN,
6356 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6357 MGET(m, M_NOWAIT, MT_DATA);
6362 bzero(mtod(m, caddr_t), m->m_len);
6369 for (n = m; n; n = n->m_next)
6371 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l));
6373 for (off = 0; off < totlen; off += l) {
6374 n = m_pulldown(m, off, l, &o);
6376 /* m is already freed */
6379 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
6380 bzero(comb, sizeof(*comb));
6381 key_getcomb_setlifetime(comb);
6382 comb->sadb_comb_encrypt = i;
6383 comb->sadb_comb_encrypt_minbits = encmin;
6384 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey);
6402 key_getsizes_ah(const struct auth_hash *ah, int alg, u_int16_t* min,
6406 *min = *max = ah->hashsize;
6407 if (ah->keysize == 0) {
6409 * Transform takes arbitrary key size but algorithm
6410 * key size is restricted. Enforce this here.
6413 case SADB_X_AALG_NULL: *min = 1; *max = 256; break;
6414 case SADB_X_AALG_SHA2_256: *min = *max = 32; break;
6415 case SADB_X_AALG_SHA2_384: *min = *max = 48; break;
6416 case SADB_X_AALG_SHA2_512: *min = *max = 64; break;
6418 DPRINTF(("%s: unknown AH algorithm %u\n",
6426 * XXX reorder combinations by preference
6428 static struct mbuf *
6429 key_getcomb_ah(void)
6431 const struct auth_hash *algo;
6432 struct sadb_comb *comb;
6434 u_int16_t minkeysize, maxkeysize;
6436 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6439 for (i = 1; i <= SADB_AALG_MAX; i++) {
6441 /* we prefer HMAC algorithms, not old algorithms */
6442 if (i != SADB_AALG_SHA1HMAC &&
6443 i != SADB_X_AALG_SHA2_256 &&
6444 i != SADB_X_AALG_SHA2_384 &&
6445 i != SADB_X_AALG_SHA2_512)
6448 algo = auth_algorithm_lookup(i);
6451 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize);
6452 /* discard algorithms with key size smaller than system min */
6453 if (_BITS(minkeysize) < V_ipsec_ah_keymin)
6457 IPSEC_ASSERT(l <= MLEN,
6458 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6459 MGET(m, M_NOWAIT, MT_DATA);
6466 M_PREPEND(m, l, M_NOWAIT);
6470 comb = mtod(m, struct sadb_comb *);
6471 bzero(comb, sizeof(*comb));
6472 key_getcomb_setlifetime(comb);
6473 comb->sadb_comb_auth = i;
6474 comb->sadb_comb_auth_minbits = _BITS(minkeysize);
6475 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize);
6482 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
6483 * XXX reorder combinations by preference
6485 static struct mbuf *
6486 key_getcomb_ipcomp(void)
6488 const struct comp_algo *algo;
6489 struct sadb_comb *comb;
6492 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6495 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
6496 algo = comp_algorithm_lookup(i);
6501 IPSEC_ASSERT(l <= MLEN,
6502 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6503 MGET(m, M_NOWAIT, MT_DATA);
6510 M_PREPEND(m, l, M_NOWAIT);
6514 comb = mtod(m, struct sadb_comb *);
6515 bzero(comb, sizeof(*comb));
6516 key_getcomb_setlifetime(comb);
6517 comb->sadb_comb_encrypt = i;
6518 /* what should we set into sadb_comb_*_{min,max}bits? */
6525 * XXX no way to pass mode (transport/tunnel) to userland
6526 * XXX replay checking?
6527 * XXX sysctl interface to ipsec_{ah,esp}_keymin
6529 static struct mbuf *
6530 key_getprop(const struct secasindex *saidx)
6532 struct sadb_prop *prop;
6534 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
6537 switch (saidx->proto) {
6539 m = key_getcomb_ealg();
6542 m = key_getcomb_ah();
6544 case IPPROTO_IPCOMP:
6545 m = key_getcomb_ipcomp();
6553 M_PREPEND(m, l, M_NOWAIT);
6558 for (n = m; n; n = n->m_next)
6561 prop = mtod(m, struct sadb_prop *);
6562 bzero(prop, sizeof(*prop));
6563 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
6564 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
6565 prop->sadb_prop_replay = 32; /* XXX */
6571 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
6573 * <base, SA, address(SD), (address(P)), x_policy,
6574 * (identity(SD),) (sensitivity,) proposal>
6575 * to KMD, and expect to receive
6576 * <base> with SADB_ACQUIRE if error occurred,
6578 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
6579 * from KMD by PF_KEY.
6581 * XXX x_policy is outside of RFC2367 (KAME extension).
6582 * XXX sensitivity is not supported.
6583 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
6584 * see comment for key_getcomb_ipcomp().
6588 * others: error number
6591 key_acquire(const struct secasindex *saidx, struct secpolicy *sp)
6593 union sockaddr_union addr;
6594 struct mbuf *result, *m;
6598 uint8_t mask, satype;
6600 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
6601 satype = key_proto2satype(saidx->proto);
6602 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto));
6606 ul_proto = IPSEC_ULPROTO_ANY;
6608 /* Get seq number to check whether sending message or not. */
6609 seq = key_getacq(saidx, &error);
6613 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
6621 * set sadb_address for saidx's.
6623 * Note that if sp is supplied, then we're being called from
6624 * key_allocsa_policy() and should supply port and protocol
6626 * XXXAE: why only TCP and UDP? ICMP and SCTP looks applicable too.
6627 * XXXAE: probably we can handle this in the ipsec[46]_allocsa().
6628 * XXXAE: it looks like we should save this info in the ACQ entry.
6630 if (sp != NULL && (sp->spidx.ul_proto == IPPROTO_TCP ||
6631 sp->spidx.ul_proto == IPPROTO_UDP))
6632 ul_proto = sp->spidx.ul_proto;
6636 if (ul_proto != IPSEC_ULPROTO_ANY) {
6637 switch (sp->spidx.src.sa.sa_family) {
6639 if (sp->spidx.src.sin.sin_port != IPSEC_PORT_ANY) {
6640 addr.sin.sin_port = sp->spidx.src.sin.sin_port;
6641 mask = sp->spidx.prefs;
6645 if (sp->spidx.src.sin6.sin6_port != IPSEC_PORT_ANY) {
6646 addr.sin6.sin6_port =
6647 sp->spidx.src.sin6.sin6_port;
6648 mask = sp->spidx.prefs;
6655 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &addr.sa, mask, ul_proto);
6664 if (ul_proto != IPSEC_ULPROTO_ANY) {
6665 switch (sp->spidx.dst.sa.sa_family) {
6667 if (sp->spidx.dst.sin.sin_port != IPSEC_PORT_ANY) {
6668 addr.sin.sin_port = sp->spidx.dst.sin.sin_port;
6669 mask = sp->spidx.prefd;
6673 if (sp->spidx.dst.sin6.sin6_port != IPSEC_PORT_ANY) {
6674 addr.sin6.sin6_port =
6675 sp->spidx.dst.sin6.sin6_port;
6676 mask = sp->spidx.prefd;
6683 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &addr.sa, mask, ul_proto);
6690 /* XXX proxy address (optional) */
6693 * Set sadb_x_policy. This is KAME extension to RFC2367.
6696 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id,
6706 * Set sadb_x_sa2 extension if saidx->reqid is not zero.
6707 * This is FreeBSD extension to RFC2367.
6709 if (saidx->reqid != 0) {
6710 m = key_setsadbxsa2(saidx->mode, 0, saidx->reqid);
6717 /* XXX identity (optional) */
6719 if (idexttype && fqdn) {
6720 /* create identity extension (FQDN) */
6721 struct sadb_ident *id;
6724 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
6725 id = (struct sadb_ident *)p;
6726 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6727 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6728 id->sadb_ident_exttype = idexttype;
6729 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
6730 bcopy(fqdn, id + 1, fqdnlen);
6731 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
6735 /* create identity extension (USERFQDN) */
6736 struct sadb_ident *id;
6740 /* +1 for terminating-NUL */
6741 userfqdnlen = strlen(userfqdn) + 1;
6744 id = (struct sadb_ident *)p;
6745 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6746 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6747 id->sadb_ident_exttype = idexttype;
6748 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
6749 /* XXX is it correct? */
6750 if (curproc && curproc->p_cred)
6751 id->sadb_ident_id = curproc->p_cred->p_ruid;
6752 if (userfqdn && userfqdnlen)
6753 bcopy(userfqdn, id + 1, userfqdnlen);
6754 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
6758 /* XXX sensitivity (optional) */
6760 /* create proposal/combination extension */
6761 m = key_getprop(saidx);
6764 * spec conformant: always attach proposal/combination extension,
6765 * the problem is that we have no way to attach it for ipcomp,
6766 * due to the way sadb_comb is declared in RFC2367.
6775 * outside of spec; make proposal/combination extension optional.
6781 if ((result->m_flags & M_PKTHDR) == 0) {
6786 if (result->m_len < sizeof(struct sadb_msg)) {
6787 result = m_pullup(result, sizeof(struct sadb_msg));
6788 if (result == NULL) {
6794 result->m_pkthdr.len = 0;
6795 for (m = result; m; m = m->m_next)
6796 result->m_pkthdr.len += m->m_len;
6798 mtod(result, struct sadb_msg *)->sadb_msg_len =
6799 PFKEY_UNIT64(result->m_pkthdr.len);
6802 printf("%s: SP(%p)\n", __func__, sp));
6803 KEYDBG(KEY_DATA, kdebug_secasindex(saidx, NULL));
6805 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6814 key_newacq(const struct secasindex *saidx, int *perror)
6819 acq = malloc(sizeof(*acq), M_IPSEC_SAQ, M_NOWAIT | M_ZERO);
6821 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6827 bcopy(saidx, &acq->saidx, sizeof(acq->saidx));
6828 acq->created = time_second;
6831 /* add to acqtree */
6833 seq = acq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq);
6834 LIST_INSERT_HEAD(&V_acqtree, acq, chain);
6835 LIST_INSERT_HEAD(ACQADDRHASH_HASH(saidx), acq, addrhash);
6836 LIST_INSERT_HEAD(ACQSEQHASH_HASH(seq), acq, seqhash);
6843 key_getacq(const struct secasindex *saidx, int *perror)
6849 LIST_FOREACH(acq, ACQADDRHASH_HASH(saidx), addrhash) {
6850 if (key_cmpsaidx(&acq->saidx, saidx, CMP_EXACTLY)) {
6851 if (acq->count > V_key_blockacq_count) {
6853 * Reset counter and send message.
6854 * Also reset created time to keep ACQ for
6857 acq->created = time_second;
6862 * Increment counter and do nothing.
6863 * We send SADB_ACQUIRE message only
6864 * for each V_key_blockacq_count packet.
6877 /* allocate new entry */
6878 return (key_newacq(saidx, perror));
6882 key_acqreset(uint32_t seq)
6887 LIST_FOREACH(acq, ACQSEQHASH_HASH(seq), seqhash) {
6888 if (acq->seq == seq) {
6890 acq->created = time_second;
6900 * Mark ACQ entry as stale to remove it in key_flush_acq().
6901 * Called after successful SADB_GETSPI message.
6904 key_acqdone(const struct secasindex *saidx, uint32_t seq)
6909 LIST_FOREACH(acq, ACQSEQHASH_HASH(seq), seqhash) {
6910 if (acq->seq == seq)
6914 if (key_cmpsaidx(&acq->saidx, saidx, CMP_EXACTLY) == 0) {
6915 ipseclog((LOG_DEBUG,
6916 "%s: Mismatched saidx for ACQ %u\n", __func__, seq));
6922 ipseclog((LOG_DEBUG,
6923 "%s: ACQ %u is not found.\n", __func__, seq));
6931 static struct secspacq *
6932 key_newspacq(struct secpolicyindex *spidx)
6934 struct secspacq *acq;
6937 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO);
6939 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6944 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
6945 acq->created = time_second;
6948 /* add to spacqtree */
6950 LIST_INSERT_HEAD(&V_spacqtree, acq, chain);
6956 static struct secspacq *
6957 key_getspacq(struct secpolicyindex *spidx)
6959 struct secspacq *acq;
6962 LIST_FOREACH(acq, &V_spacqtree, chain) {
6963 if (key_cmpspidx_exactly(spidx, &acq->spidx)) {
6964 /* NB: return holding spacq_lock */
6974 * SADB_ACQUIRE processing,
6975 * in first situation, is receiving
6977 * from the ikmpd, and clear sequence of its secasvar entry.
6979 * In second situation, is receiving
6980 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6981 * from a user land process, and return
6982 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6985 * m will always be freed.
6988 key_acquire2(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
6990 SAHTREE_RLOCK_TRACKER;
6991 struct sadb_address *src0, *dst0;
6992 struct secasindex saidx;
6993 struct secashead *sah;
6996 uint8_t mode, proto;
6998 IPSEC_ASSERT(so != NULL, ("null socket"));
6999 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7000 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7001 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7004 * Error message from KMd.
7005 * We assume that if error was occurred in IKEd, the length of PFKEY
7006 * message is equal to the size of sadb_msg structure.
7007 * We do not raise error even if error occurred in this function.
7009 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
7010 /* check sequence number */
7011 if (mhp->msg->sadb_msg_seq == 0 ||
7012 mhp->msg->sadb_msg_errno == 0) {
7013 ipseclog((LOG_DEBUG, "%s: must specify sequence "
7014 "number and errno.\n", __func__));
7017 * IKEd reported that error occurred.
7018 * XXXAE: what it expects from the kernel?
7019 * Probably we should send SADB_ACQUIRE again?
7020 * If so, reset ACQ's state.
7021 * XXXAE: it looks useless.
7023 key_acqreset(mhp->msg->sadb_msg_seq);
7030 * This message is from user land.
7033 /* map satype to proto */
7034 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7035 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7037 return key_senderror(so, m, EINVAL);
7040 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
7041 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
7042 SADB_CHECKHDR(mhp, SADB_EXT_PROPOSAL)) {
7043 ipseclog((LOG_DEBUG,
7044 "%s: invalid message: missing required header.\n",
7046 return key_senderror(so, m, EINVAL);
7048 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
7049 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) ||
7050 SADB_CHECKLEN(mhp, SADB_EXT_PROPOSAL)) {
7051 ipseclog((LOG_DEBUG,
7052 "%s: invalid message: wrong header size.\n", __func__));
7053 return key_senderror(so, m, EINVAL);
7056 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
7057 mode = IPSEC_MODE_ANY;
7060 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
7061 ipseclog((LOG_DEBUG,
7062 "%s: invalid message: wrong header size.\n",
7064 return key_senderror(so, m, EINVAL);
7066 mode = ((struct sadb_x_sa2 *)
7067 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
7068 reqid = ((struct sadb_x_sa2 *)
7069 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
7072 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
7073 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
7075 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
7076 (struct sockaddr *)(dst0 + 1));
7078 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
7079 return key_senderror(so, m, EINVAL);
7081 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
7083 /* get a SA index */
7085 LIST_FOREACH(sah, SAHADDRHASH_HASH(&saidx), addrhash) {
7086 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
7091 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__));
7092 return key_senderror(so, m, EEXIST);
7095 error = key_acquire(&saidx, NULL);
7097 ipseclog((LOG_DEBUG,
7098 "%s: error %d returned from key_acquire()\n",
7100 return key_senderror(so, m, error);
7107 * SADB_REGISTER processing.
7108 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
7111 * from the ikmpd, and register a socket to send PF_KEY messages,
7115 * If socket is detached, must free from regnode.
7117 * m will always be freed.
7120 key_register(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7122 struct secreg *reg, *newreg = NULL;
7124 IPSEC_ASSERT(so != NULL, ("null socket"));
7125 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7126 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7127 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7129 /* check for invalid register message */
7130 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0]))
7131 return key_senderror(so, m, EINVAL);
7133 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
7134 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
7137 /* check whether existing or not */
7139 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) {
7140 if (reg->so == so) {
7142 ipseclog((LOG_DEBUG, "%s: socket exists already.\n",
7144 return key_senderror(so, m, EEXIST);
7148 /* create regnode */
7149 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO);
7150 if (newreg == NULL) {
7152 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
7153 return key_senderror(so, m, ENOBUFS);
7157 ((struct keycb *)(so->so_pcb))->kp_registered++;
7159 /* add regnode to regtree. */
7160 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain);
7166 struct sadb_msg *newmsg;
7167 struct sadb_supported *sup;
7168 u_int len, alen, elen;
7171 struct sadb_alg *alg;
7173 /* create new sadb_msg to reply. */
7175 for (i = 1; i <= SADB_AALG_MAX; i++) {
7176 if (auth_algorithm_lookup(i))
7177 alen += sizeof(struct sadb_alg);
7180 alen += sizeof(struct sadb_supported);
7182 for (i = 1; i <= SADB_EALG_MAX; i++) {
7183 if (enc_algorithm_lookup(i))
7184 elen += sizeof(struct sadb_alg);
7187 elen += sizeof(struct sadb_supported);
7189 len = sizeof(struct sadb_msg) + alen + elen;
7192 return key_senderror(so, m, ENOBUFS);
7194 MGETHDR(n, M_NOWAIT, MT_DATA);
7195 if (n != NULL && len > MHLEN) {
7196 if (!(MCLGET(n, M_NOWAIT))) {
7202 return key_senderror(so, m, ENOBUFS);
7204 n->m_pkthdr.len = n->m_len = len;
7208 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
7209 newmsg = mtod(n, struct sadb_msg *);
7210 newmsg->sadb_msg_errno = 0;
7211 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
7212 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
7214 /* for authentication algorithm */
7216 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
7217 sup->sadb_supported_len = PFKEY_UNIT64(alen);
7218 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
7219 off += PFKEY_ALIGN8(sizeof(*sup));
7221 for (i = 1; i <= SADB_AALG_MAX; i++) {
7222 const struct auth_hash *aalgo;
7223 u_int16_t minkeysize, maxkeysize;
7225 aalgo = auth_algorithm_lookup(i);
7228 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
7229 alg->sadb_alg_id = i;
7230 alg->sadb_alg_ivlen = 0;
7231 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize);
7232 alg->sadb_alg_minbits = _BITS(minkeysize);
7233 alg->sadb_alg_maxbits = _BITS(maxkeysize);
7234 off += PFKEY_ALIGN8(sizeof(*alg));
7238 /* for encryption algorithm */
7240 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
7241 sup->sadb_supported_len = PFKEY_UNIT64(elen);
7242 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
7243 off += PFKEY_ALIGN8(sizeof(*sup));
7245 for (i = 1; i <= SADB_EALG_MAX; i++) {
7246 const struct enc_xform *ealgo;
7248 ealgo = enc_algorithm_lookup(i);
7251 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
7252 alg->sadb_alg_id = i;
7253 alg->sadb_alg_ivlen = ealgo->ivsize;
7254 alg->sadb_alg_minbits = _BITS(ealgo->minkey);
7255 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey);
7256 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
7260 IPSEC_ASSERT(off == len,
7261 ("length assumption failed (off %u len %u)", off, len));
7264 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
7269 * free secreg entry registered.
7270 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
7273 key_freereg(struct socket *so)
7278 IPSEC_ASSERT(so != NULL, ("NULL so"));
7281 * check whether existing or not.
7282 * check all type of SA, because there is a potential that
7283 * one socket is registered to multiple type of SA.
7286 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7287 LIST_FOREACH(reg, &V_regtree[i], chain) {
7288 if (reg->so == so && __LIST_CHAINED(reg)) {
7289 LIST_REMOVE(reg, chain);
7290 free(reg, M_IPSEC_SAR);
7299 * SADB_EXPIRE processing
7301 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
7303 * NOTE: We send only soft lifetime extension.
7306 * others : error number
7309 key_expire(struct secasvar *sav, int hard)
7311 struct mbuf *result = NULL, *m;
7312 struct sadb_lifetime *lt;
7313 uint32_t replay_count;
7317 SECASVAR_RLOCK_TRACKER;
7319 IPSEC_ASSERT (sav != NULL, ("null sav"));
7320 IPSEC_ASSERT (sav->sah != NULL, ("null sa header"));
7323 printf("%s: SA(%p) expired %s lifetime\n", __func__,
7324 sav, hard ? "hard": "soft"));
7325 KEYDBG(KEY_DATA, kdebug_secasv(sav));
7326 /* set msg header */
7327 satype = key_proto2satype(sav->sah->saidx.proto);
7328 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype));
7329 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
7336 /* create SA extension */
7337 m = key_setsadbsa(sav);
7344 /* create SA extension */
7345 SECASVAR_RLOCK(sav);
7346 replay_count = sav->replay ? sav->replay->count : 0;
7347 SECASVAR_RUNLOCK(sav);
7349 m = key_setsadbxsa2(sav->sah->saidx.mode, replay_count,
7350 sav->sah->saidx.reqid);
7357 if (sav->replay && sav->replay->wsize > UINT8_MAX) {
7358 m = key_setsadbxsareplay(sav->replay->wsize);
7366 /* create lifetime extension (current and soft) */
7367 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
7368 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
7375 bzero(mtod(m, caddr_t), len);
7376 lt = mtod(m, struct sadb_lifetime *);
7377 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
7378 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
7379 lt->sadb_lifetime_allocations =
7380 (uint32_t)counter_u64_fetch(sav->lft_c_allocations);
7381 lt->sadb_lifetime_bytes =
7382 counter_u64_fetch(sav->lft_c_bytes);
7383 lt->sadb_lifetime_addtime = sav->created;
7384 lt->sadb_lifetime_usetime = sav->firstused;
7385 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
7386 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
7388 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
7389 lt->sadb_lifetime_allocations = sav->lft_h->allocations;
7390 lt->sadb_lifetime_bytes = sav->lft_h->bytes;
7391 lt->sadb_lifetime_addtime = sav->lft_h->addtime;
7392 lt->sadb_lifetime_usetime = sav->lft_h->usetime;
7394 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
7395 lt->sadb_lifetime_allocations = sav->lft_s->allocations;
7396 lt->sadb_lifetime_bytes = sav->lft_s->bytes;
7397 lt->sadb_lifetime_addtime = sav->lft_s->addtime;
7398 lt->sadb_lifetime_usetime = sav->lft_s->usetime;
7402 /* set sadb_address for source */
7403 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
7404 &sav->sah->saidx.src.sa,
7405 FULLMASK, IPSEC_ULPROTO_ANY);
7412 /* set sadb_address for destination */
7413 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
7414 &sav->sah->saidx.dst.sa,
7415 FULLMASK, IPSEC_ULPROTO_ANY);
7423 * XXX-BZ Handle NAT-T extensions here.
7424 * XXXAE: it doesn't seem quite useful. IKEs should not depend on
7425 * this information, we report only significant SA fields.
7428 if ((result->m_flags & M_PKTHDR) == 0) {
7433 if (result->m_len < sizeof(struct sadb_msg)) {
7434 result = m_pullup(result, sizeof(struct sadb_msg));
7435 if (result == NULL) {
7441 result->m_pkthdr.len = 0;
7442 for (m = result; m; m = m->m_next)
7443 result->m_pkthdr.len += m->m_len;
7445 mtod(result, struct sadb_msg *)->sadb_msg_len =
7446 PFKEY_UNIT64(result->m_pkthdr.len);
7448 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
7457 key_freesah_flushed(struct secashead_queue *flushq)
7459 struct secashead *sah, *nextsah;
7460 struct secasvar *sav, *nextsav;
7462 sah = TAILQ_FIRST(flushq);
7463 while (sah != NULL) {
7464 sav = TAILQ_FIRST(&sah->savtree_larval);
7465 while (sav != NULL) {
7466 nextsav = TAILQ_NEXT(sav, chain);
7467 TAILQ_REMOVE(&sah->savtree_larval, sav, chain);
7468 key_freesav(&sav); /* release last reference */
7469 key_freesah(&sah); /* release reference from SAV */
7472 sav = TAILQ_FIRST(&sah->savtree_alive);
7473 while (sav != NULL) {
7474 nextsav = TAILQ_NEXT(sav, chain);
7475 TAILQ_REMOVE(&sah->savtree_alive, sav, chain);
7476 key_freesav(&sav); /* release last reference */
7477 key_freesah(&sah); /* release reference from SAV */
7480 nextsah = TAILQ_NEXT(sah, chain);
7481 key_freesah(&sah); /* release last reference */
7487 * SADB_FLUSH processing
7490 * from the ikmpd, and free all entries in secastree.
7494 * NOTE: to do is only marking SADB_SASTATE_DEAD.
7496 * m will always be freed.
7499 key_flush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7501 struct secashead_queue flushq;
7502 struct sadb_msg *newmsg;
7503 struct secashead *sah, *nextsah;
7504 struct secasvar *sav;
7508 IPSEC_ASSERT(so != NULL, ("null socket"));
7509 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7510 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7512 /* map satype to proto */
7513 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7514 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7516 return key_senderror(so, m, EINVAL);
7519 printf("%s: proto %u\n", __func__, proto));
7521 TAILQ_INIT(&flushq);
7522 if (proto == IPSEC_PROTO_ANY) {
7523 /* no SATYPE specified, i.e. flushing all SA. */
7525 /* Move all SAHs into flushq */
7526 TAILQ_CONCAT(&flushq, &V_sahtree, chain);
7527 /* Flush all buckets in SPI hash */
7528 for (i = 0; i < V_savhash_mask + 1; i++)
7529 LIST_INIT(&V_savhashtbl[i]);
7530 /* Flush all buckets in SAHADDRHASH */
7531 for (i = 0; i < V_sahaddrhash_mask + 1; i++)
7532 LIST_INIT(&V_sahaddrhashtbl[i]);
7533 /* Mark all SAHs as unlinked */
7534 TAILQ_FOREACH(sah, &flushq, chain) {
7535 sah->state = SADB_SASTATE_DEAD;
7537 * Callout handler makes its job using
7538 * RLOCK and drain queues. In case, when this
7539 * function will be called just before it
7540 * acquires WLOCK, we need to mark SAs as
7541 * unlinked to prevent second unlink.
7543 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
7544 sav->state = SADB_SASTATE_DEAD;
7546 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
7547 sav->state = SADB_SASTATE_DEAD;
7553 sah = TAILQ_FIRST(&V_sahtree);
7554 while (sah != NULL) {
7555 IPSEC_ASSERT(sah->state != SADB_SASTATE_DEAD,
7556 ("DEAD SAH %p in SADB_FLUSH", sah));
7557 nextsah = TAILQ_NEXT(sah, chain);
7558 if (sah->saidx.proto != proto) {
7562 sah->state = SADB_SASTATE_DEAD;
7563 TAILQ_REMOVE(&V_sahtree, sah, chain);
7564 LIST_REMOVE(sah, addrhash);
7565 /* Unlink all SAs from SPI hash */
7566 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
7567 LIST_REMOVE(sav, spihash);
7568 sav->state = SADB_SASTATE_DEAD;
7570 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
7571 LIST_REMOVE(sav, spihash);
7572 sav->state = SADB_SASTATE_DEAD;
7574 /* Add SAH into flushq */
7575 TAILQ_INSERT_HEAD(&flushq, sah, chain);
7581 key_freesah_flushed(&flushq);
7582 /* Free all queued SAs and SAHs */
7583 if (m->m_len < sizeof(struct sadb_msg) ||
7584 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
7585 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
7586 return key_senderror(so, m, ENOBUFS);
7592 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
7593 newmsg = mtod(m, struct sadb_msg *);
7594 newmsg->sadb_msg_errno = 0;
7595 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
7597 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7601 * SADB_DUMP processing
7602 * dump all entries including status of DEAD in SAD.
7605 * from the ikmpd, and dump all secasvar leaves
7610 * m will always be freed.
7613 key_dump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7615 SAHTREE_RLOCK_TRACKER;
7616 struct secashead *sah;
7617 struct secasvar *sav;
7620 uint8_t proto, satype;
7622 IPSEC_ASSERT(so != NULL, ("null socket"));
7623 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7624 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7625 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7627 /* map satype to proto */
7628 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7629 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7631 return key_senderror(so, m, EINVAL);
7634 /* count sav entries to be sent to the userland. */
7637 TAILQ_FOREACH(sah, &V_sahtree, chain) {
7638 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC &&
7639 proto != sah->saidx.proto)
7642 TAILQ_FOREACH(sav, &sah->savtree_larval, chain)
7644 TAILQ_FOREACH(sav, &sah->savtree_alive, chain)
7650 return key_senderror(so, m, ENOENT);
7653 /* send this to the userland, one at a time. */
7654 TAILQ_FOREACH(sah, &V_sahtree, chain) {
7655 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC &&
7656 proto != sah->saidx.proto)
7659 /* map proto to satype */
7660 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
7662 ipseclog((LOG_DEBUG, "%s: there was invalid proto in "
7663 "SAD.\n", __func__));
7664 return key_senderror(so, m, EINVAL);
7666 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
7667 n = key_setdumpsa(sav, SADB_DUMP, satype,
7668 --cnt, mhp->msg->sadb_msg_pid);
7671 return key_senderror(so, m, ENOBUFS);
7673 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
7675 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
7676 n = key_setdumpsa(sav, SADB_DUMP, satype,
7677 --cnt, mhp->msg->sadb_msg_pid);
7680 return key_senderror(so, m, ENOBUFS);
7682 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
7690 * SADB_X_PROMISC processing
7692 * m will always be freed.
7695 key_promisc(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7699 IPSEC_ASSERT(so != NULL, ("null socket"));
7700 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7701 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7702 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7704 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7706 if (olen < sizeof(struct sadb_msg)) {
7708 return key_senderror(so, m, EINVAL);
7713 } else if (olen == sizeof(struct sadb_msg)) {
7714 /* enable/disable promisc mode */
7717 if ((kp = so->so_pcb) == NULL)
7718 return key_senderror(so, m, EINVAL);
7719 mhp->msg->sadb_msg_errno = 0;
7720 switch (mhp->msg->sadb_msg_satype) {
7723 kp->kp_promisc = mhp->msg->sadb_msg_satype;
7726 return key_senderror(so, m, EINVAL);
7729 /* send the original message back to everyone */
7730 mhp->msg->sadb_msg_errno = 0;
7731 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7733 /* send packet as is */
7735 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
7737 /* TODO: if sadb_msg_seq is specified, send to specific pid */
7738 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7742 static int (*key_typesw[])(struct socket *, struct mbuf *,
7743 const struct sadb_msghdr *) = {
7744 NULL, /* SADB_RESERVED */
7745 key_getspi, /* SADB_GETSPI */
7746 key_update, /* SADB_UPDATE */
7747 key_add, /* SADB_ADD */
7748 key_delete, /* SADB_DELETE */
7749 key_get, /* SADB_GET */
7750 key_acquire2, /* SADB_ACQUIRE */
7751 key_register, /* SADB_REGISTER */
7752 NULL, /* SADB_EXPIRE */
7753 key_flush, /* SADB_FLUSH */
7754 key_dump, /* SADB_DUMP */
7755 key_promisc, /* SADB_X_PROMISC */
7756 NULL, /* SADB_X_PCHANGE */
7757 key_spdadd, /* SADB_X_SPDUPDATE */
7758 key_spdadd, /* SADB_X_SPDADD */
7759 key_spddelete, /* SADB_X_SPDDELETE */
7760 key_spdget, /* SADB_X_SPDGET */
7761 NULL, /* SADB_X_SPDACQUIRE */
7762 key_spddump, /* SADB_X_SPDDUMP */
7763 key_spdflush, /* SADB_X_SPDFLUSH */
7764 key_spdadd, /* SADB_X_SPDSETIDX */
7765 NULL, /* SADB_X_SPDEXPIRE */
7766 key_spddelete2, /* SADB_X_SPDDELETE2 */
7770 * parse sadb_msg buffer to process PFKEYv2,
7771 * and create a data to response if needed.
7772 * I think to be dealed with mbuf directly.
7774 * msgp : pointer to pointer to a received buffer pulluped.
7775 * This is rewrited to response.
7776 * so : pointer to socket.
7778 * length for buffer to send to user process.
7781 key_parse(struct mbuf *m, struct socket *so)
7783 struct sadb_msg *msg;
7784 struct sadb_msghdr mh;
7789 IPSEC_ASSERT(so != NULL, ("null socket"));
7790 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7792 if (m->m_len < sizeof(struct sadb_msg)) {
7793 m = m_pullup(m, sizeof(struct sadb_msg));
7797 msg = mtod(m, struct sadb_msg *);
7798 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
7799 target = KEY_SENDUP_ONE;
7801 if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len != orglen) {
7802 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__));
7803 PFKEYSTAT_INC(out_invlen);
7808 if (msg->sadb_msg_version != PF_KEY_V2) {
7809 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n",
7810 __func__, msg->sadb_msg_version));
7811 PFKEYSTAT_INC(out_invver);
7816 if (msg->sadb_msg_type > SADB_MAX) {
7817 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
7818 __func__, msg->sadb_msg_type));
7819 PFKEYSTAT_INC(out_invmsgtype);
7824 /* for old-fashioned code - should be nuked */
7825 if (m->m_pkthdr.len > MCLBYTES) {
7832 MGETHDR(n, M_NOWAIT, MT_DATA);
7833 if (n && m->m_pkthdr.len > MHLEN) {
7834 if (!(MCLGET(n, M_NOWAIT))) {
7843 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
7844 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
7850 /* align the mbuf chain so that extensions are in contiguous region. */
7851 error = key_align(m, &mh);
7857 /* We use satype as scope mask for spddump */
7858 if (msg->sadb_msg_type == SADB_X_SPDDUMP) {
7859 switch (msg->sadb_msg_satype) {
7860 case IPSEC_POLICYSCOPE_ANY:
7861 case IPSEC_POLICYSCOPE_GLOBAL:
7862 case IPSEC_POLICYSCOPE_IFNET:
7863 case IPSEC_POLICYSCOPE_PCB:
7866 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n",
7867 __func__, msg->sadb_msg_type));
7868 PFKEYSTAT_INC(out_invsatype);
7873 switch (msg->sadb_msg_satype) { /* check SA type */
7874 case SADB_SATYPE_UNSPEC:
7875 switch (msg->sadb_msg_type) {
7883 ipseclog((LOG_DEBUG, "%s: must specify satype "
7884 "when msg type=%u.\n", __func__,
7885 msg->sadb_msg_type));
7886 PFKEYSTAT_INC(out_invsatype);
7891 case SADB_SATYPE_AH:
7892 case SADB_SATYPE_ESP:
7893 case SADB_X_SATYPE_IPCOMP:
7894 case SADB_X_SATYPE_TCPSIGNATURE:
7895 switch (msg->sadb_msg_type) {
7897 case SADB_X_SPDDELETE:
7899 case SADB_X_SPDFLUSH:
7900 case SADB_X_SPDSETIDX:
7901 case SADB_X_SPDUPDATE:
7902 case SADB_X_SPDDELETE2:
7903 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n",
7904 __func__, msg->sadb_msg_type));
7905 PFKEYSTAT_INC(out_invsatype);
7910 case SADB_SATYPE_RSVP:
7911 case SADB_SATYPE_OSPFV2:
7912 case SADB_SATYPE_RIPV2:
7913 case SADB_SATYPE_MIP:
7914 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n",
7915 __func__, msg->sadb_msg_satype));
7916 PFKEYSTAT_INC(out_invsatype);
7919 case 1: /* XXX: What does it do? */
7920 if (msg->sadb_msg_type == SADB_X_PROMISC)
7924 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
7925 __func__, msg->sadb_msg_satype));
7926 PFKEYSTAT_INC(out_invsatype);
7932 /* check field of upper layer protocol and address family */
7933 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
7934 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
7935 struct sadb_address *src0, *dst0;
7938 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
7939 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
7941 /* check upper layer protocol */
7942 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
7943 ipseclog((LOG_DEBUG, "%s: upper layer protocol "
7944 "mismatched.\n", __func__));
7945 PFKEYSTAT_INC(out_invaddr);
7951 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
7952 PFKEY_ADDR_SADDR(dst0)->sa_family) {
7953 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n",
7955 PFKEYSTAT_INC(out_invaddr);
7959 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7960 PFKEY_ADDR_SADDR(dst0)->sa_len) {
7961 ipseclog((LOG_DEBUG, "%s: address struct size "
7962 "mismatched.\n", __func__));
7963 PFKEYSTAT_INC(out_invaddr);
7968 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7970 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7971 sizeof(struct sockaddr_in)) {
7972 PFKEYSTAT_INC(out_invaddr);
7978 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7979 sizeof(struct sockaddr_in6)) {
7980 PFKEYSTAT_INC(out_invaddr);
7986 ipseclog((LOG_DEBUG, "%s: unsupported address family\n",
7988 PFKEYSTAT_INC(out_invaddr);
7989 error = EAFNOSUPPORT;
7993 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7995 plen = sizeof(struct in_addr) << 3;
7998 plen = sizeof(struct in6_addr) << 3;
8001 plen = 0; /*fool gcc*/
8005 /* check max prefix length */
8006 if (src0->sadb_address_prefixlen > plen ||
8007 dst0->sadb_address_prefixlen > plen) {
8008 ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n",
8010 PFKEYSTAT_INC(out_invaddr);
8016 * prefixlen == 0 is valid because there can be a case when
8017 * all addresses are matched.
8021 if (msg->sadb_msg_type >= nitems(key_typesw) ||
8022 key_typesw[msg->sadb_msg_type] == NULL) {
8023 PFKEYSTAT_INC(out_invmsgtype);
8028 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
8031 msg->sadb_msg_errno = error;
8032 return key_sendup_mbuf(so, m, target);
8036 key_senderror(struct socket *so, struct mbuf *m, int code)
8038 struct sadb_msg *msg;
8040 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
8041 ("mbuf too small, len %u", m->m_len));
8043 msg = mtod(m, struct sadb_msg *);
8044 msg->sadb_msg_errno = code;
8045 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
8049 * set the pointer to each header into message buffer.
8050 * m will be freed on error.
8051 * XXX larger-than-MCLBYTES extension?
8054 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
8057 struct sadb_ext *ext;
8062 IPSEC_ASSERT(m != NULL, ("null mbuf"));
8063 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
8064 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
8065 ("mbuf too small, len %u", m->m_len));
8068 bzero(mhp, sizeof(*mhp));
8070 mhp->msg = mtod(m, struct sadb_msg *);
8071 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
8073 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
8074 extlen = end; /*just in case extlen is not updated*/
8075 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
8076 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
8078 /* m is already freed */
8081 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
8084 switch (ext->sadb_ext_type) {
8086 case SADB_EXT_ADDRESS_SRC:
8087 case SADB_EXT_ADDRESS_DST:
8088 case SADB_EXT_ADDRESS_PROXY:
8089 case SADB_EXT_LIFETIME_CURRENT:
8090 case SADB_EXT_LIFETIME_HARD:
8091 case SADB_EXT_LIFETIME_SOFT:
8092 case SADB_EXT_KEY_AUTH:
8093 case SADB_EXT_KEY_ENCRYPT:
8094 case SADB_EXT_IDENTITY_SRC:
8095 case SADB_EXT_IDENTITY_DST:
8096 case SADB_EXT_SENSITIVITY:
8097 case SADB_EXT_PROPOSAL:
8098 case SADB_EXT_SUPPORTED_AUTH:
8099 case SADB_EXT_SUPPORTED_ENCRYPT:
8100 case SADB_EXT_SPIRANGE:
8101 case SADB_X_EXT_POLICY:
8102 case SADB_X_EXT_SA2:
8103 case SADB_X_EXT_NAT_T_TYPE:
8104 case SADB_X_EXT_NAT_T_SPORT:
8105 case SADB_X_EXT_NAT_T_DPORT:
8106 case SADB_X_EXT_NAT_T_OAI:
8107 case SADB_X_EXT_NAT_T_OAR:
8108 case SADB_X_EXT_NAT_T_FRAG:
8109 case SADB_X_EXT_SA_REPLAY:
8110 case SADB_X_EXT_NEW_ADDRESS_SRC:
8111 case SADB_X_EXT_NEW_ADDRESS_DST:
8112 /* duplicate check */
8114 * XXX Are there duplication payloads of either
8115 * KEY_AUTH or KEY_ENCRYPT ?
8117 if (mhp->ext[ext->sadb_ext_type] != NULL) {
8118 ipseclog((LOG_DEBUG, "%s: duplicate ext_type "
8119 "%u\n", __func__, ext->sadb_ext_type));
8121 PFKEYSTAT_INC(out_dupext);
8126 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n",
8127 __func__, ext->sadb_ext_type));
8129 PFKEYSTAT_INC(out_invexttype);
8133 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
8135 if (key_validate_ext(ext, extlen)) {
8137 PFKEYSTAT_INC(out_invlen);
8141 n = m_pulldown(m, off, extlen, &toff);
8143 /* m is already freed */
8146 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
8148 mhp->ext[ext->sadb_ext_type] = ext;
8149 mhp->extoff[ext->sadb_ext_type] = off;
8150 mhp->extlen[ext->sadb_ext_type] = extlen;
8155 PFKEYSTAT_INC(out_invlen);
8163 key_validate_ext(const struct sadb_ext *ext, int len)
8165 const struct sockaddr *sa;
8166 enum { NONE, ADDR } checktype = NONE;
8168 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
8170 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
8173 /* if it does not match minimum/maximum length, bail */
8174 if (ext->sadb_ext_type >= nitems(minsize) ||
8175 ext->sadb_ext_type >= nitems(maxsize))
8177 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
8179 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
8182 /* more checks based on sadb_ext_type XXX need more */
8183 switch (ext->sadb_ext_type) {
8184 case SADB_EXT_ADDRESS_SRC:
8185 case SADB_EXT_ADDRESS_DST:
8186 case SADB_EXT_ADDRESS_PROXY:
8187 case SADB_X_EXT_NAT_T_OAI:
8188 case SADB_X_EXT_NAT_T_OAR:
8189 case SADB_X_EXT_NEW_ADDRESS_SRC:
8190 case SADB_X_EXT_NEW_ADDRESS_DST:
8191 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
8194 case SADB_EXT_IDENTITY_SRC:
8195 case SADB_EXT_IDENTITY_DST:
8196 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
8197 SADB_X_IDENTTYPE_ADDR) {
8198 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
8208 switch (checktype) {
8212 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen);
8213 if (len < baselen + sal)
8215 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
8228 TUNABLE_INT_FETCH("net.key.spdcache.maxentries",
8229 &V_key_spdcache_maxentries);
8230 TUNABLE_INT_FETCH("net.key.spdcache.threshold",
8231 &V_key_spdcache_threshold);
8233 if (V_key_spdcache_maxentries) {
8234 V_key_spdcache_maxentries = MAX(V_key_spdcache_maxentries,
8235 SPDCACHE_MAX_ENTRIES_PER_HASH);
8236 V_spdcachehashtbl = hashinit(V_key_spdcache_maxentries /
8237 SPDCACHE_MAX_ENTRIES_PER_HASH,
8238 M_IPSEC_SPDCACHE, &V_spdcachehash_mask);
8239 V_key_spdcache_maxentries = (V_spdcachehash_mask + 1)
8240 * SPDCACHE_MAX_ENTRIES_PER_HASH;
8242 V_spdcache_lock = malloc(sizeof(struct mtx) *
8243 (V_spdcachehash_mask + 1),
8244 M_IPSEC_SPDCACHE, M_WAITOK|M_ZERO);
8246 for (i = 0; i < V_spdcachehash_mask + 1; ++i)
8247 SPDCACHE_LOCK_INIT(i);
8251 struct spdcache_entry *
8252 spdcache_entry_alloc(const struct secpolicyindex *spidx, struct secpolicy *sp)
8254 struct spdcache_entry *entry;
8256 entry = malloc(sizeof(struct spdcache_entry),
8257 M_IPSEC_SPDCACHE, M_NOWAIT|M_ZERO);
8264 entry->spidx = *spidx;
8271 spdcache_entry_free(struct spdcache_entry *entry)
8274 if (entry->sp != NULL)
8275 key_freesp(&entry->sp);
8276 free(entry, M_IPSEC_SPDCACHE);
8280 spdcache_clear(void)
8282 struct spdcache_entry *entry;
8285 for (i = 0; i < V_spdcachehash_mask + 1; ++i) {
8287 while (!LIST_EMPTY(&V_spdcachehashtbl[i])) {
8288 entry = LIST_FIRST(&V_spdcachehashtbl[i]);
8289 LIST_REMOVE(entry, chain);
8290 spdcache_entry_free(entry);
8298 spdcache_destroy(void)
8302 if (SPDCACHE_ENABLED()) {
8304 hashdestroy(V_spdcachehashtbl, M_IPSEC_SPDCACHE, V_spdcachehash_mask);
8306 for (i = 0; i < V_spdcachehash_mask + 1; ++i)
8307 SPDCACHE_LOCK_DESTROY(i);
8309 free(V_spdcache_lock, M_IPSEC_SPDCACHE);
8315 key_vnet_init(void *arg __unused)
8319 for (i = 0; i < IPSEC_DIR_MAX; i++) {
8320 TAILQ_INIT(&V_sptree[i]);
8321 TAILQ_INIT(&V_sptree_ifnet[i]);
8324 TAILQ_INIT(&V_sahtree);
8325 V_sphashtbl = hashinit(SPHASH_NHASH, M_IPSEC_SP, &V_sphash_mask);
8326 V_savhashtbl = hashinit(SAVHASH_NHASH, M_IPSEC_SA, &V_savhash_mask);
8327 V_sahaddrhashtbl = hashinit(SAHHASH_NHASH, M_IPSEC_SAH,
8328 &V_sahaddrhash_mask);
8329 V_acqaddrhashtbl = hashinit(ACQHASH_NHASH, M_IPSEC_SAQ,
8330 &V_acqaddrhash_mask);
8331 V_acqseqhashtbl = hashinit(ACQHASH_NHASH, M_IPSEC_SAQ,
8332 &V_acqseqhash_mask);
8336 for (i = 0; i <= SADB_SATYPE_MAX; i++)
8337 LIST_INIT(&V_regtree[i]);
8339 LIST_INIT(&V_acqtree);
8340 LIST_INIT(&V_spacqtree);
8342 VNET_SYSINIT(key_vnet_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_SECOND,
8343 key_vnet_init, NULL);
8346 key_init(void *arg __unused)
8349 ipsec_key_lft_zone = uma_zcreate("IPsec SA lft_c",
8350 sizeof(uint64_t) * 2, NULL, NULL, NULL, NULL,
8351 UMA_ALIGN_PTR, UMA_ZONE_PCPU);
8354 REGTREE_LOCK_INIT();
8355 SAHTREE_LOCK_INIT();
8358 SPI_ALLOC_LOCK_INIT();
8360 #ifndef IPSEC_DEBUG2
8361 callout_init(&key_timer, 1);
8362 callout_reset(&key_timer, hz, key_timehandler, NULL);
8363 #endif /*IPSEC_DEBUG2*/
8365 /* initialize key statistics */
8366 keystat.getspi_count = 1;
8369 printf("IPsec: Initialized Security Association Processing.\n");
8371 SYSINIT(key_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, key_init, NULL);
8375 key_vnet_destroy(void *arg __unused)
8377 struct secashead_queue sahdrainq;
8378 struct secpolicy_queue drainq;
8379 struct secpolicy *sp, *nextsp;
8380 struct secacq *acq, *nextacq;
8381 struct secspacq *spacq, *nextspacq;
8382 struct secashead *sah;
8383 struct secasvar *sav;
8388 * XXX: can we just call free() for each object without
8389 * walking through safe way with releasing references?
8391 TAILQ_INIT(&drainq);
8393 for (i = 0; i < IPSEC_DIR_MAX; i++) {
8394 TAILQ_CONCAT(&drainq, &V_sptree[i], chain);
8395 TAILQ_CONCAT(&drainq, &V_sptree_ifnet[i], chain);
8397 for (i = 0; i < V_sphash_mask + 1; i++)
8398 LIST_INIT(&V_sphashtbl[i]);
8402 sp = TAILQ_FIRST(&drainq);
8403 while (sp != NULL) {
8404 nextsp = TAILQ_NEXT(sp, chain);
8409 TAILQ_INIT(&sahdrainq);
8411 TAILQ_CONCAT(&sahdrainq, &V_sahtree, chain);
8412 for (i = 0; i < V_savhash_mask + 1; i++)
8413 LIST_INIT(&V_savhashtbl[i]);
8414 for (i = 0; i < V_sahaddrhash_mask + 1; i++)
8415 LIST_INIT(&V_sahaddrhashtbl[i]);
8416 TAILQ_FOREACH(sah, &sahdrainq, chain) {
8417 sah->state = SADB_SASTATE_DEAD;
8418 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
8419 sav->state = SADB_SASTATE_DEAD;
8421 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
8422 sav->state = SADB_SASTATE_DEAD;
8427 key_freesah_flushed(&sahdrainq);
8428 hashdestroy(V_sphashtbl, M_IPSEC_SP, V_sphash_mask);
8429 hashdestroy(V_savhashtbl, M_IPSEC_SA, V_savhash_mask);
8430 hashdestroy(V_sahaddrhashtbl, M_IPSEC_SAH, V_sahaddrhash_mask);
8433 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
8434 LIST_FOREACH(reg, &V_regtree[i], chain) {
8435 if (__LIST_CHAINED(reg)) {
8436 LIST_REMOVE(reg, chain);
8437 free(reg, M_IPSEC_SAR);
8445 acq = LIST_FIRST(&V_acqtree);
8446 while (acq != NULL) {
8447 nextacq = LIST_NEXT(acq, chain);
8448 LIST_REMOVE(acq, chain);
8449 free(acq, M_IPSEC_SAQ);
8452 for (i = 0; i < V_acqaddrhash_mask + 1; i++)
8453 LIST_INIT(&V_acqaddrhashtbl[i]);
8454 for (i = 0; i < V_acqseqhash_mask + 1; i++)
8455 LIST_INIT(&V_acqseqhashtbl[i]);
8459 for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL;
8460 spacq = nextspacq) {
8461 nextspacq = LIST_NEXT(spacq, chain);
8462 if (__LIST_CHAINED(spacq)) {
8463 LIST_REMOVE(spacq, chain);
8464 free(spacq, M_IPSEC_SAQ);
8468 hashdestroy(V_acqaddrhashtbl, M_IPSEC_SAQ, V_acqaddrhash_mask);
8469 hashdestroy(V_acqseqhashtbl, M_IPSEC_SAQ, V_acqseqhash_mask);
8471 VNET_SYSUNINIT(key_vnet_destroy, SI_SUB_PROTO_DOMAIN, SI_ORDER_SECOND,
8472 key_vnet_destroy, NULL);
8476 * XXX: as long as domains are not unloadable, this function is never called,
8477 * provided for consistensy and future unload support.
8480 key_destroy(void *arg __unused)
8482 uma_zdestroy(ipsec_key_lft_zone);
8484 #ifndef IPSEC_DEBUG2
8485 callout_drain(&key_timer);
8487 SPTREE_LOCK_DESTROY();
8488 REGTREE_LOCK_DESTROY();
8489 SAHTREE_LOCK_DESTROY();
8491 SPACQ_LOCK_DESTROY();
8492 SPI_ALLOC_LOCK_DESTROY();
8494 SYSUNINIT(key_destroy, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST, key_destroy, NULL);
8496 /* record data transfer on SA, and update timestamps */
8498 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
8500 IPSEC_ASSERT(sav != NULL, ("Null secasvar"));
8501 IPSEC_ASSERT(m != NULL, ("Null mbuf"));
8504 * XXX Currently, there is a difference of bytes size
8505 * between inbound and outbound processing.
8507 counter_u64_add(sav->lft_c_bytes, m->m_pkthdr.len);
8510 * We use the number of packets as the unit of
8511 * allocations. We increment the variable
8512 * whenever {esp,ah}_{in,out}put is called.
8514 counter_u64_add(sav->lft_c_allocations, 1);
8517 * NOTE: We record CURRENT usetime by using wall clock,
8518 * in seconds. HARD and SOFT lifetime are measured by the time
8519 * difference (again in seconds) from usetime.
8523 * -----+-----+--------+---> t
8524 * <--------------> HARD
8527 if (sav->firstused == 0)
8528 sav->firstused = time_second;
8532 * Take one of the kernel's security keys and convert it into a PF_KEY
8533 * structure within an mbuf, suitable for sending up to a waiting
8534 * application in user land.
8537 * src: A pointer to a kernel security key.
8538 * exttype: Which type of key this is. Refer to the PF_KEY data structures.
8540 * a valid mbuf or NULL indicating an error
8544 static struct mbuf *
8545 key_setkey(struct seckey *src, uint16_t exttype)
8554 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src));
8555 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
8560 p = mtod(m, struct sadb_key *);
8562 p->sadb_key_len = PFKEY_UNIT64(len);
8563 p->sadb_key_exttype = exttype;
8564 p->sadb_key_bits = src->bits;
8565 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src));
8571 * Take one of the kernel's lifetime data structures and convert it
8572 * into a PF_KEY structure within an mbuf, suitable for sending up to
8573 * a waiting application in user land.
8576 * src: A pointer to a kernel lifetime structure.
8577 * exttype: Which type of lifetime this is. Refer to the PF_KEY
8578 * data structures for more information.
8580 * a valid mbuf or NULL indicating an error
8584 static struct mbuf *
8585 key_setlifetime(struct seclifetime *src, uint16_t exttype)
8587 struct mbuf *m = NULL;
8588 struct sadb_lifetime *p;
8589 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime));
8594 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
8599 p = mtod(m, struct sadb_lifetime *);
8602 p->sadb_lifetime_len = PFKEY_UNIT64(len);
8603 p->sadb_lifetime_exttype = exttype;
8604 p->sadb_lifetime_allocations = src->allocations;
8605 p->sadb_lifetime_bytes = src->bytes;
8606 p->sadb_lifetime_addtime = src->addtime;
8607 p->sadb_lifetime_usetime = src->usetime;
8613 const struct enc_xform *
8614 enc_algorithm_lookup(int alg)
8618 for (i = 0; i < nitems(supported_ealgs); i++)
8619 if (alg == supported_ealgs[i].sadb_alg)
8620 return (supported_ealgs[i].xform);
8624 const struct auth_hash *
8625 auth_algorithm_lookup(int alg)
8629 for (i = 0; i < nitems(supported_aalgs); i++)
8630 if (alg == supported_aalgs[i].sadb_alg)
8631 return (supported_aalgs[i].xform);
8635 const struct comp_algo *
8636 comp_algorithm_lookup(int alg)
8640 for (i = 0; i < nitems(supported_calgs); i++)
8641 if (alg == supported_calgs[i].sadb_alg)
8642 return (supported_calgs[i].xform);