2 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * This code is referd to RFC 2367
38 #include "opt_inet6.h"
39 #include "opt_ipsec.h"
41 #include <sys/types.h>
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/fnv_hash.h>
47 #include <sys/mutex.h>
49 #include <sys/domain.h>
50 #include <sys/protosw.h>
51 #include <sys/malloc.h>
52 #include <sys/rmlock.h>
53 #include <sys/socket.h>
54 #include <sys/socketvar.h>
55 #include <sys/sysctl.h>
56 #include <sys/errno.h>
58 #include <sys/queue.h>
59 #include <sys/refcount.h>
60 #include <sys/syslog.h>
65 #include <net/if_var.h>
67 #include <net/raw_cb.h>
69 #include <netinet/in.h>
70 #include <netinet/in_systm.h>
71 #include <netinet/ip.h>
72 #include <netinet/in_var.h>
73 #include <netinet/udp.h>
76 #include <netinet/ip6.h>
77 #include <netinet6/in6_var.h>
78 #include <netinet6/ip6_var.h>
81 #include <net/pfkeyv2.h>
82 #include <netipsec/keydb.h>
83 #include <netipsec/key.h>
84 #include <netipsec/keysock.h>
85 #include <netipsec/key_debug.h>
87 #include <netipsec/ipsec.h>
89 #include <netipsec/ipsec6.h>
92 #include <netipsec/xform.h>
93 #include <machine/in_cksum.h>
94 #include <machine/stdarg.h>
97 #include <sys/random.h>
100 #define _BITS(bytes) ((bytes) << 3)
103 * Note on SA reference counting:
104 * - SAs that are not in DEAD state will have (total external reference + 1)
105 * following value in reference count field. they cannot be freed and are
106 * referenced from SA header.
107 * - SAs that are in DEAD state will have (total external reference)
108 * in reference count field. they are ready to be freed. reference from
109 * SA header will be removed in key_delsav(), when the reference count
110 * field hits 0 (= no external reference other than from SA header.
113 VNET_DEFINE(u_int32_t, key_debug_level) = 0;
114 static VNET_DEFINE(u_int, key_spi_trycnt) = 1000;
115 static VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100;
116 static VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */
117 static VNET_DEFINE(u_int32_t, policy_id) = 0;
118 /*interval to initialize randseed,1(m)*/
119 static VNET_DEFINE(u_int, key_int_random) = 60;
120 /* interval to expire acquiring, 30(s)*/
121 static VNET_DEFINE(u_int, key_larval_lifetime) = 30;
122 /* counter for blocking SADB_ACQUIRE.*/
123 static VNET_DEFINE(int, key_blockacq_count) = 10;
124 /* lifetime for blocking SADB_ACQUIRE.*/
125 static VNET_DEFINE(int, key_blockacq_lifetime) = 20;
126 /* preferred old sa rather than new sa.*/
127 static VNET_DEFINE(int, key_preferred_oldsa) = 1;
128 #define V_key_spi_trycnt VNET(key_spi_trycnt)
129 #define V_key_spi_minval VNET(key_spi_minval)
130 #define V_key_spi_maxval VNET(key_spi_maxval)
131 #define V_policy_id VNET(policy_id)
132 #define V_key_int_random VNET(key_int_random)
133 #define V_key_larval_lifetime VNET(key_larval_lifetime)
134 #define V_key_blockacq_count VNET(key_blockacq_count)
135 #define V_key_blockacq_lifetime VNET(key_blockacq_lifetime)
136 #define V_key_preferred_oldsa VNET(key_preferred_oldsa)
138 static VNET_DEFINE(u_int32_t, acq_seq) = 0;
139 #define V_acq_seq VNET(acq_seq)
141 static VNET_DEFINE(uint32_t, sp_genid) = 0;
142 #define V_sp_genid VNET(sp_genid)
145 TAILQ_HEAD(secpolicy_queue, secpolicy);
146 LIST_HEAD(secpolicy_list, secpolicy);
147 static VNET_DEFINE(struct secpolicy_queue, sptree[IPSEC_DIR_MAX]);
148 static VNET_DEFINE(struct secpolicy_queue, sptree_ifnet[IPSEC_DIR_MAX]);
149 static struct rmlock sptree_lock;
150 #define V_sptree VNET(sptree)
151 #define V_sptree_ifnet VNET(sptree_ifnet)
152 #define SPTREE_LOCK_INIT() rm_init(&sptree_lock, "sptree")
153 #define SPTREE_LOCK_DESTROY() rm_destroy(&sptree_lock)
154 #define SPTREE_RLOCK_TRACKER struct rm_priotracker sptree_tracker
155 #define SPTREE_RLOCK() rm_rlock(&sptree_lock, &sptree_tracker)
156 #define SPTREE_RUNLOCK() rm_runlock(&sptree_lock, &sptree_tracker)
157 #define SPTREE_RLOCK_ASSERT() rm_assert(&sptree_lock, RA_RLOCKED)
158 #define SPTREE_WLOCK() rm_wlock(&sptree_lock)
159 #define SPTREE_WUNLOCK() rm_wunlock(&sptree_lock)
160 #define SPTREE_WLOCK_ASSERT() rm_assert(&sptree_lock, RA_WLOCKED)
161 #define SPTREE_UNLOCK_ASSERT() rm_assert(&sptree_lock, RA_UNLOCKED)
163 /* Hash table for lookup SP using unique id */
164 static VNET_DEFINE(struct secpolicy_list *, sphashtbl);
165 static VNET_DEFINE(u_long, sphash_mask);
166 #define V_sphashtbl VNET(sphashtbl)
167 #define V_sphash_mask VNET(sphash_mask)
169 #define SPHASH_NHASH_LOG2 7
170 #define SPHASH_NHASH (1 << SPHASH_NHASH_LOG2)
171 #define SPHASH_HASHVAL(id) (key_u32hash(id) & V_sphash_mask)
172 #define SPHASH_HASH(id) &V_sphashtbl[SPHASH_HASHVAL(id)]
175 TAILQ_HEAD(secashead_queue, secashead);
176 LIST_HEAD(secashead_list, secashead);
177 static VNET_DEFINE(struct secashead_queue, sahtree);
178 static struct rmlock sahtree_lock;
179 #define V_sahtree VNET(sahtree)
180 #define SAHTREE_LOCK_INIT() rm_init(&sahtree_lock, "sahtree")
181 #define SAHTREE_LOCK_DESTROY() rm_destroy(&sahtree_lock)
182 #define SAHTREE_RLOCK_TRACKER struct rm_priotracker sahtree_tracker
183 #define SAHTREE_RLOCK() rm_rlock(&sahtree_lock, &sahtree_tracker)
184 #define SAHTREE_RUNLOCK() rm_runlock(&sahtree_lock, &sahtree_tracker)
185 #define SAHTREE_RLOCK_ASSERT() rm_assert(&sahtree_lock, RA_RLOCKED)
186 #define SAHTREE_WLOCK() rm_wlock(&sahtree_lock)
187 #define SAHTREE_WUNLOCK() rm_wunlock(&sahtree_lock)
188 #define SAHTREE_WLOCK_ASSERT() rm_assert(&sahtree_lock, RA_WLOCKED)
189 #define SAHTREE_UNLOCK_ASSERT() rm_assert(&sahtree_lock, RA_UNLOCKED)
191 /* Hash table for lookup in SAD using SA addresses */
192 static VNET_DEFINE(struct secashead_list *, sahaddrhashtbl);
193 static VNET_DEFINE(u_long, sahaddrhash_mask);
194 #define V_sahaddrhashtbl VNET(sahaddrhashtbl)
195 #define V_sahaddrhash_mask VNET(sahaddrhash_mask)
197 #define SAHHASH_NHASH_LOG2 7
198 #define SAHHASH_NHASH (1 << SAHHASH_NHASH_LOG2)
199 #define SAHADDRHASH_HASHVAL(saidx) \
200 (key_saidxhash(saidx) & V_sahaddrhash_mask)
201 #define SAHADDRHASH_HASH(saidx) \
202 &V_sahaddrhashtbl[SAHADDRHASH_HASHVAL(saidx)]
204 /* Hash table for lookup in SAD using SPI */
205 LIST_HEAD(secasvar_list, secasvar);
206 static VNET_DEFINE(struct secasvar_list *, savhashtbl);
207 static VNET_DEFINE(u_long, savhash_mask);
208 #define V_savhashtbl VNET(savhashtbl)
209 #define V_savhash_mask VNET(savhash_mask)
210 #define SAVHASH_NHASH_LOG2 7
211 #define SAVHASH_NHASH (1 << SAVHASH_NHASH_LOG2)
212 #define SAVHASH_HASHVAL(spi) (key_u32hash(spi) & V_savhash_mask)
213 #define SAVHASH_HASH(spi) &V_savhashtbl[SAVHASH_HASHVAL(spi)]
216 key_saidxhash(const struct secasindex *saidx)
220 hval = fnv_32_buf(&saidx->proto, sizeof(saidx->proto),
222 switch (saidx->dst.sa.sa_family) {
225 hval = fnv_32_buf(&saidx->src.sin.sin_addr,
226 sizeof(in_addr_t), hval);
227 hval = fnv_32_buf(&saidx->dst.sin.sin_addr,
228 sizeof(in_addr_t), hval);
233 hval = fnv_32_buf(&saidx->src.sin6.sin6_addr,
234 sizeof(struct in6_addr), hval);
235 hval = fnv_32_buf(&saidx->dst.sin6.sin6_addr,
236 sizeof(struct in6_addr), hval);
241 ipseclog((LOG_DEBUG, "%s: unknown address family %d",
242 __func__, saidx->dst.sa.sa_family));
248 key_u32hash(uint32_t val)
251 return (fnv_32_buf(&val, sizeof(val), FNV1_32_INIT));
255 static VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]);
256 #define V_regtree VNET(regtree)
257 static struct mtx regtree_lock;
258 #define REGTREE_LOCK_INIT() \
259 mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF)
260 #define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock)
261 #define REGTREE_LOCK() mtx_lock(®tree_lock)
262 #define REGTREE_UNLOCK() mtx_unlock(®tree_lock)
263 #define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED)
266 LIST_HEAD(secacq_list, secacq);
267 static VNET_DEFINE(struct secacq_list, acqtree);
268 #define V_acqtree VNET(acqtree)
269 static struct mtx acq_lock;
270 #define ACQ_LOCK_INIT() \
271 mtx_init(&acq_lock, "acqtree", "ipsec SA acquiring list", MTX_DEF)
272 #define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock)
273 #define ACQ_LOCK() mtx_lock(&acq_lock)
274 #define ACQ_UNLOCK() mtx_unlock(&acq_lock)
275 #define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED)
277 /* Hash table for lookup in ACQ list using SA addresses */
278 static VNET_DEFINE(struct secacq_list *, acqaddrhashtbl);
279 static VNET_DEFINE(u_long, acqaddrhash_mask);
280 #define V_acqaddrhashtbl VNET(acqaddrhashtbl)
281 #define V_acqaddrhash_mask VNET(acqaddrhash_mask)
283 /* Hash table for lookup in ACQ list using SEQ number */
284 static VNET_DEFINE(struct secacq_list *, acqseqhashtbl);
285 static VNET_DEFINE(u_long, acqseqhash_mask);
286 #define V_acqseqhashtbl VNET(acqseqhashtbl)
287 #define V_acqseqhash_mask VNET(acqseqhash_mask)
289 #define ACQHASH_NHASH_LOG2 7
290 #define ACQHASH_NHASH (1 << ACQHASH_NHASH_LOG2)
291 #define ACQADDRHASH_HASHVAL(saidx) \
292 (key_saidxhash(saidx) & V_acqaddrhash_mask)
293 #define ACQSEQHASH_HASHVAL(seq) \
294 (key_u32hash(seq) & V_acqseqhash_mask)
295 #define ACQADDRHASH_HASH(saidx) \
296 &V_acqaddrhashtbl[ACQADDRHASH_HASHVAL(saidx)]
297 #define ACQSEQHASH_HASH(seq) \
298 &V_acqseqhashtbl[ACQSEQHASH_HASHVAL(seq)]
299 /* SP acquiring list */
300 static VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree);
301 #define V_spacqtree VNET(spacqtree)
302 static struct mtx spacq_lock;
303 #define SPACQ_LOCK_INIT() \
304 mtx_init(&spacq_lock, "spacqtree", \
305 "fast ipsec security policy acquire list", MTX_DEF)
306 #define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock)
307 #define SPACQ_LOCK() mtx_lock(&spacq_lock)
308 #define SPACQ_UNLOCK() mtx_unlock(&spacq_lock)
309 #define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED)
311 static const int minsize[] = {
312 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
313 sizeof(struct sadb_sa), /* SADB_EXT_SA */
314 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
315 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
316 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
317 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
318 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
319 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
320 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
321 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
322 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
323 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
324 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
325 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
326 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
327 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
328 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
329 0, /* SADB_X_EXT_KMPRIVATE */
330 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
331 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
332 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
333 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
334 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
335 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */
336 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */
337 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
338 sizeof(struct sadb_x_sa_replay), /* SADB_X_EXT_SA_REPLAY */
339 sizeof(struct sadb_address), /* SADB_X_EXT_NEW_ADDRESS_SRC */
340 sizeof(struct sadb_address), /* SADB_X_EXT_NEW_ADDRESS_DST */
342 _Static_assert(sizeof(minsize)/sizeof(int) == SADB_EXT_MAX + 1, "minsize size mismatch");
344 static const int maxsize[] = {
345 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
346 sizeof(struct sadb_sa), /* SADB_EXT_SA */
347 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
348 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
349 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
350 0, /* SADB_EXT_ADDRESS_SRC */
351 0, /* SADB_EXT_ADDRESS_DST */
352 0, /* SADB_EXT_ADDRESS_PROXY */
353 0, /* SADB_EXT_KEY_AUTH */
354 0, /* SADB_EXT_KEY_ENCRYPT */
355 0, /* SADB_EXT_IDENTITY_SRC */
356 0, /* SADB_EXT_IDENTITY_DST */
357 0, /* SADB_EXT_SENSITIVITY */
358 0, /* SADB_EXT_PROPOSAL */
359 0, /* SADB_EXT_SUPPORTED_AUTH */
360 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
361 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
362 0, /* SADB_X_EXT_KMPRIVATE */
363 0, /* SADB_X_EXT_POLICY */
364 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
365 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
366 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
367 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
368 0, /* SADB_X_EXT_NAT_T_OAI */
369 0, /* SADB_X_EXT_NAT_T_OAR */
370 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
371 sizeof(struct sadb_x_sa_replay), /* SADB_X_EXT_SA_REPLAY */
372 0, /* SADB_X_EXT_NEW_ADDRESS_SRC */
373 0, /* SADB_X_EXT_NEW_ADDRESS_DST */
375 _Static_assert(sizeof(maxsize)/sizeof(int) == SADB_EXT_MAX + 1, "minsize size mismatch");
378 * Internal values for SA flags:
379 * SADB_X_EXT_F_CLONED means that SA was cloned by key_updateaddresses,
380 * thus we will not free the most of SA content in key_delsav().
382 #define SADB_X_EXT_F_CLONED 0x80000000
384 #define SADB_CHECKLEN(_mhp, _ext) \
385 ((_mhp)->extlen[(_ext)] < minsize[(_ext)] || (maxsize[(_ext)] != 0 && \
386 ((_mhp)->extlen[(_ext)] > maxsize[(_ext)])))
387 #define SADB_CHECKHDR(_mhp, _ext) ((_mhp)->ext[(_ext)] == NULL)
389 static VNET_DEFINE(int, ipsec_esp_keymin) = 256;
390 static VNET_DEFINE(int, ipsec_esp_auth) = 0;
391 static VNET_DEFINE(int, ipsec_ah_keymin) = 128;
393 #define V_ipsec_esp_keymin VNET(ipsec_esp_keymin)
394 #define V_ipsec_esp_auth VNET(ipsec_esp_auth)
395 #define V_ipsec_ah_keymin VNET(ipsec_ah_keymin)
398 VNET_DEFINE(int, ipsec_debug) = 1;
400 VNET_DEFINE(int, ipsec_debug) = 0;
404 SYSCTL_DECL(_net_inet_ipsec);
405 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEBUG, debug,
406 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_debug), 0,
407 "Enable IPsec debugging output when set.");
410 SYSCTL_DECL(_net_inet6_ipsec6);
411 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEBUG, debug,
412 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_debug), 0,
413 "Enable IPsec debugging output when set.");
416 SYSCTL_DECL(_net_key);
417 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug,
418 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, "");
420 /* max count of trial for the decision of spi value */
421 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt,
422 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, "");
424 /* minimum spi value to allocate automatically. */
425 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval,
426 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, "");
428 /* maximun spi value to allocate automatically. */
429 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval,
430 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, "");
432 /* interval to initialize randseed */
433 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random,
434 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_int_random), 0, "");
436 /* lifetime for larval SA */
437 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime,
438 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, "");
440 /* counter for blocking to send SADB_ACQUIRE to IKEd */
441 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count,
442 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, "");
444 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
445 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime,
446 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, "");
449 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth,
450 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, "");
452 /* minimum ESP key length */
453 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin,
454 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, "");
456 /* minimum AH key length */
457 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin,
458 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, "");
460 /* perfered old SA rather than new SA */
461 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, preferred_oldsa,
462 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, "");
464 #define __LIST_CHAINED(elm) \
465 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
467 MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association");
468 MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head");
469 MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy");
470 MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request");
471 MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous");
472 MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire");
473 MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire");
475 static VNET_DEFINE(uma_zone_t, key_lft_zone);
476 #define V_key_lft_zone VNET(key_lft_zone)
478 static LIST_HEAD(xforms_list, xformsw) xforms = LIST_HEAD_INITIALIZER();
479 static struct mtx xforms_lock;
480 #define XFORMS_LOCK_INIT() \
481 mtx_init(&xforms_lock, "xforms_list", "IPsec transforms list", MTX_DEF)
482 #define XFORMS_LOCK_DESTROY() mtx_destroy(&xforms_lock)
483 #define XFORMS_LOCK() mtx_lock(&xforms_lock)
484 #define XFORMS_UNLOCK() mtx_unlock(&xforms_lock)
487 * set parameters into secpolicyindex buffer.
488 * Must allocate secpolicyindex buffer passed to this function.
490 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
492 bzero((idx), sizeof(struct secpolicyindex)); \
493 (idx)->dir = (_dir); \
494 (idx)->prefs = (ps); \
495 (idx)->prefd = (pd); \
496 (idx)->ul_proto = (ulp); \
497 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
498 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
502 * set parameters into secasindex buffer.
503 * Must allocate secasindex buffer before calling this function.
505 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
507 bzero((idx), sizeof(struct secasindex)); \
508 (idx)->proto = (p); \
510 (idx)->reqid = (r); \
511 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
512 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
513 key_porttosaddr(&(idx)->src.sa, 0); \
514 key_porttosaddr(&(idx)->dst.sa, 0); \
519 u_long getspi_count; /* the avarage of count to try to get new SPI */
523 struct sadb_msg *msg;
524 struct sadb_ext *ext[SADB_EXT_MAX + 1];
525 int extoff[SADB_EXT_MAX + 1];
526 int extlen[SADB_EXT_MAX + 1];
529 static struct supported_ealgs {
531 const struct enc_xform *xform;
532 } supported_ealgs[] = {
533 { SADB_EALG_DESCBC, &enc_xform_des },
534 { SADB_EALG_3DESCBC, &enc_xform_3des },
535 { SADB_X_EALG_AES, &enc_xform_rijndael128 },
536 { SADB_X_EALG_BLOWFISHCBC, &enc_xform_blf },
537 { SADB_X_EALG_CAST128CBC, &enc_xform_cast5 },
538 { SADB_EALG_NULL, &enc_xform_null },
539 { SADB_X_EALG_CAMELLIACBC, &enc_xform_camellia },
540 { SADB_X_EALG_AESCTR, &enc_xform_aes_icm },
541 { SADB_X_EALG_AESGCM16, &enc_xform_aes_nist_gcm },
542 { SADB_X_EALG_AESGMAC, &enc_xform_aes_nist_gmac },
545 static struct supported_aalgs {
547 const struct auth_hash *xform;
548 } supported_aalgs[] = {
549 { SADB_X_AALG_NULL, &auth_hash_null },
550 { SADB_AALG_MD5HMAC, &auth_hash_hmac_md5 },
551 { SADB_AALG_SHA1HMAC, &auth_hash_hmac_sha1 },
552 { SADB_X_AALG_RIPEMD160HMAC, &auth_hash_hmac_ripemd_160 },
553 { SADB_X_AALG_MD5, &auth_hash_key_md5 },
554 { SADB_X_AALG_SHA, &auth_hash_key_sha1 },
555 { SADB_X_AALG_SHA2_256, &auth_hash_hmac_sha2_256 },
556 { SADB_X_AALG_SHA2_384, &auth_hash_hmac_sha2_384 },
557 { SADB_X_AALG_SHA2_512, &auth_hash_hmac_sha2_512 },
558 { SADB_X_AALG_AES128GMAC, &auth_hash_nist_gmac_aes_128 },
559 { SADB_X_AALG_AES192GMAC, &auth_hash_nist_gmac_aes_192 },
560 { SADB_X_AALG_AES256GMAC, &auth_hash_nist_gmac_aes_256 },
563 static struct supported_calgs {
565 const struct comp_algo *xform;
566 } supported_calgs[] = {
567 { SADB_X_CALG_DEFLATE, &comp_algo_deflate },
571 static struct callout key_timer;
574 static void key_unlink(struct secpolicy *);
575 static struct secpolicy *key_getsp(struct secpolicyindex *);
576 static struct secpolicy *key_getspbyid(u_int32_t);
577 static struct mbuf *key_gather_mbuf(struct mbuf *,
578 const struct sadb_msghdr *, int, int, ...);
579 static int key_spdadd(struct socket *, struct mbuf *,
580 const struct sadb_msghdr *);
581 static uint32_t key_getnewspid(void);
582 static int key_spddelete(struct socket *, struct mbuf *,
583 const struct sadb_msghdr *);
584 static int key_spddelete2(struct socket *, struct mbuf *,
585 const struct sadb_msghdr *);
586 static int key_spdget(struct socket *, struct mbuf *,
587 const struct sadb_msghdr *);
588 static int key_spdflush(struct socket *, struct mbuf *,
589 const struct sadb_msghdr *);
590 static int key_spddump(struct socket *, struct mbuf *,
591 const struct sadb_msghdr *);
592 static struct mbuf *key_setdumpsp(struct secpolicy *,
593 u_int8_t, u_int32_t, u_int32_t);
594 static struct mbuf *key_sp2mbuf(struct secpolicy *);
595 static size_t key_getspreqmsglen(struct secpolicy *);
596 static int key_spdexpire(struct secpolicy *);
597 static struct secashead *key_newsah(struct secasindex *);
598 static void key_freesah(struct secashead **);
599 static void key_delsah(struct secashead *);
600 static struct secasvar *key_newsav(const struct sadb_msghdr *,
601 struct secasindex *, uint32_t, int *);
602 static void key_delsav(struct secasvar *);
603 static void key_unlinksav(struct secasvar *);
604 static struct secashead *key_getsah(struct secasindex *);
605 static int key_checkspidup(uint32_t);
606 static struct secasvar *key_getsavbyspi(uint32_t);
607 static int key_setnatt(struct secasvar *, const struct sadb_msghdr *);
608 static int key_setsaval(struct secasvar *, const struct sadb_msghdr *);
609 static int key_updatelifetimes(struct secasvar *, const struct sadb_msghdr *);
610 static int key_updateaddresses(struct socket *, struct mbuf *,
611 const struct sadb_msghdr *, struct secasvar *, struct secasindex *);
613 static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t,
614 u_int8_t, u_int32_t, u_int32_t);
615 static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t,
616 u_int32_t, pid_t, u_int16_t);
617 static struct mbuf *key_setsadbsa(struct secasvar *);
618 static struct mbuf *key_setsadbaddr(u_int16_t,
619 const struct sockaddr *, u_int8_t, u_int16_t);
620 static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t);
621 static struct mbuf *key_setsadbxtype(u_int16_t);
622 static struct mbuf *key_setsadbxsa2(u_int8_t, u_int32_t, u_int32_t);
623 static struct mbuf *key_setsadbxsareplay(u_int32_t);
624 static struct mbuf *key_setsadbxpolicy(u_int16_t, u_int8_t,
625 u_int32_t, u_int32_t);
626 static struct seckey *key_dup_keymsg(const struct sadb_key *, size_t,
627 struct malloc_type *);
628 static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src,
629 struct malloc_type *);
631 /* flags for key_cmpsaidx() */
632 #define CMP_HEAD 1 /* protocol, addresses. */
633 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
634 #define CMP_REQID 3 /* additionally HEAD, reaid. */
635 #define CMP_EXACTLY 4 /* all elements. */
636 static int key_cmpsaidx(const struct secasindex *,
637 const struct secasindex *, int);
638 static int key_cmpspidx_exactly(struct secpolicyindex *,
639 struct secpolicyindex *);
640 static int key_cmpspidx_withmask(struct secpolicyindex *,
641 struct secpolicyindex *);
642 static int key_bbcmp(const void *, const void *, u_int);
643 static uint8_t key_satype2proto(uint8_t);
644 static uint8_t key_proto2satype(uint8_t);
646 static int key_getspi(struct socket *, struct mbuf *,
647 const struct sadb_msghdr *);
648 static uint32_t key_do_getnewspi(struct sadb_spirange *, struct secasindex *);
649 static int key_update(struct socket *, struct mbuf *,
650 const struct sadb_msghdr *);
651 static int key_add(struct socket *, struct mbuf *,
652 const struct sadb_msghdr *);
653 static int key_setident(struct secashead *, const struct sadb_msghdr *);
654 static struct mbuf *key_getmsgbuf_x1(struct mbuf *,
655 const struct sadb_msghdr *);
656 static int key_delete(struct socket *, struct mbuf *,
657 const struct sadb_msghdr *);
658 static int key_delete_all(struct socket *, struct mbuf *,
659 const struct sadb_msghdr *, struct secasindex *);
660 static void key_delete_xform(const struct xformsw *);
661 static int key_get(struct socket *, struct mbuf *,
662 const struct sadb_msghdr *);
664 static void key_getcomb_setlifetime(struct sadb_comb *);
665 static struct mbuf *key_getcomb_ealg(void);
666 static struct mbuf *key_getcomb_ah(void);
667 static struct mbuf *key_getcomb_ipcomp(void);
668 static struct mbuf *key_getprop(const struct secasindex *);
670 static int key_acquire(const struct secasindex *, struct secpolicy *);
671 static uint32_t key_newacq(const struct secasindex *, int *);
672 static uint32_t key_getacq(const struct secasindex *, int *);
673 static int key_acqdone(const struct secasindex *, uint32_t);
674 static int key_acqreset(uint32_t);
675 static struct secspacq *key_newspacq(struct secpolicyindex *);
676 static struct secspacq *key_getspacq(struct secpolicyindex *);
677 static int key_acquire2(struct socket *, struct mbuf *,
678 const struct sadb_msghdr *);
679 static int key_register(struct socket *, struct mbuf *,
680 const struct sadb_msghdr *);
681 static int key_expire(struct secasvar *, int);
682 static int key_flush(struct socket *, struct mbuf *,
683 const struct sadb_msghdr *);
684 static int key_dump(struct socket *, struct mbuf *,
685 const struct sadb_msghdr *);
686 static int key_promisc(struct socket *, struct mbuf *,
687 const struct sadb_msghdr *);
688 static int key_senderror(struct socket *, struct mbuf *, int);
689 static int key_validate_ext(const struct sadb_ext *, int);
690 static int key_align(struct mbuf *, struct sadb_msghdr *);
691 static struct mbuf *key_setlifetime(struct seclifetime *, uint16_t);
692 static struct mbuf *key_setkey(struct seckey *, uint16_t);
693 static int xform_init(struct secasvar *, u_short);
695 #define DBG_IPSEC_INITREF(t, p) do { \
696 refcount_init(&(p)->refcnt, 1); \
698 printf("%s: Initialize refcnt %s(%p) = %u\n", \
699 __func__, #t, (p), (p)->refcnt)); \
701 #define DBG_IPSEC_ADDREF(t, p) do { \
702 refcount_acquire(&(p)->refcnt); \
704 printf("%s: Acquire refcnt %s(%p) -> %u\n", \
705 __func__, #t, (p), (p)->refcnt)); \
707 #define DBG_IPSEC_DELREF(t, p) do { \
709 printf("%s: Release refcnt %s(%p) -> %u\n", \
710 __func__, #t, (p), (p)->refcnt - 1)); \
711 refcount_release(&(p)->refcnt); \
714 #define IPSEC_INITREF(t, p) refcount_init(&(p)->refcnt, 1)
715 #define IPSEC_ADDREF(t, p) refcount_acquire(&(p)->refcnt)
716 #define IPSEC_DELREF(t, p) refcount_release(&(p)->refcnt)
718 #define SP_INITREF(p) IPSEC_INITREF(SP, p)
719 #define SP_ADDREF(p) IPSEC_ADDREF(SP, p)
720 #define SP_DELREF(p) IPSEC_DELREF(SP, p)
722 #define SAH_INITREF(p) IPSEC_INITREF(SAH, p)
723 #define SAH_ADDREF(p) IPSEC_ADDREF(SAH, p)
724 #define SAH_DELREF(p) IPSEC_DELREF(SAH, p)
726 #define SAV_INITREF(p) IPSEC_INITREF(SAV, p)
727 #define SAV_ADDREF(p) IPSEC_ADDREF(SAV, p)
728 #define SAV_DELREF(p) IPSEC_DELREF(SAV, p)
731 * Update the refcnt while holding the SPTREE lock.
734 key_addref(struct secpolicy *sp)
741 * Return 0 when there are known to be no SP's for the specified
742 * direction. Otherwise return 1. This is used by IPsec code
743 * to optimize performance.
746 key_havesp(u_int dir)
749 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
750 TAILQ_FIRST(&V_sptree[dir]) != NULL : 1);
753 /* %%% IPsec policy management */
755 * Return current SPDB generation.
772 key_checksockaddrs(struct sockaddr *src, struct sockaddr *dst)
776 if (src->sa_family != dst->sa_family)
779 if (src->sa_len != dst->sa_len)
781 switch (src->sa_family) {
784 if (src->sa_len != sizeof(struct sockaddr_in))
790 if (src->sa_len != sizeof(struct sockaddr_in6))
795 return (EAFNOSUPPORT);
801 * allocating a SP for OUTBOUND or INBOUND packet.
802 * Must call key_freesp() later.
803 * OUT: NULL: not found
804 * others: found and return the pointer.
807 key_allocsp(struct secpolicyindex *spidx, u_int dir)
809 SPTREE_RLOCK_TRACKER;
810 struct secpolicy *sp;
812 IPSEC_ASSERT(spidx != NULL, ("null spidx"));
813 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
814 ("invalid direction %u", dir));
817 TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
818 if (key_cmpspidx_withmask(&sp->spidx, spidx)) {
825 if (sp != NULL) { /* found a SPD entry */
826 sp->lastused = time_second;
828 printf("%s: return SP(%p)\n", __func__, sp));
829 KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp));
832 printf("%s: lookup failed for ", __func__);
833 kdebug_secpolicyindex(spidx, NULL));
839 * Allocating an SA entry for an *INBOUND* or *OUTBOUND* TCP packet, signed
840 * or should be signed by MD5 signature.
841 * We don't use key_allocsa() for such lookups, because we don't know SPI.
842 * Unlike ESP and AH protocols, SPI isn't transmitted in the TCP header with
843 * signed packet. We use SADB only as storage for password.
844 * OUT: positive: corresponding SA for given saidx found.
848 key_allocsa_tcpmd5(struct secasindex *saidx)
850 SAHTREE_RLOCK_TRACKER;
851 struct secashead *sah;
852 struct secasvar *sav;
854 IPSEC_ASSERT(saidx->proto == IPPROTO_TCP,
855 ("unexpected security protocol %u", saidx->proto));
856 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TCPMD5,
857 ("unexpected mode %u", saidx->mode));
860 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
862 printf("%s: checking SAH\n", __func__);
863 kdebug_secash(sah, " "));
864 if (sah->saidx.proto != IPPROTO_TCP)
866 if (!key_sockaddrcmp(&saidx->dst.sa, &sah->saidx.dst.sa, 0))
870 if (V_key_preferred_oldsa)
871 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
873 sav = TAILQ_FIRST(&sah->savtree_alive);
882 printf("%s: return SA(%p)\n", __func__, sav));
883 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
886 printf("%s: SA not found\n", __func__));
887 KEYDBG(IPSEC_DATA, kdebug_secasindex(saidx, NULL));
893 * Allocating an SA entry for an *OUTBOUND* packet.
894 * OUT: positive: corresponding SA for given saidx found.
895 * NULL: SA not found, but will be acquired, check *error
896 * for acquiring status.
899 key_allocsa_policy(struct secpolicy *sp, const struct secasindex *saidx,
902 SAHTREE_RLOCK_TRACKER;
903 struct secashead *sah;
904 struct secasvar *sav;
906 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
907 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
908 saidx->mode == IPSEC_MODE_TUNNEL,
909 ("unexpected policy %u", saidx->mode));
912 * We check new SA in the IPsec request because a different
913 * SA may be involved each time this request is checked, either
914 * because new SAs are being configured, or this request is
915 * associated with an unconnected datagram socket, or this request
916 * is associated with a system default policy.
919 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
921 printf("%s: checking SAH\n", __func__);
922 kdebug_secash(sah, " "));
923 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
929 * Allocate the oldest SA available according to
930 * draft-jenkins-ipsec-rekeying-03.
932 if (V_key_preferred_oldsa)
933 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
935 sav = TAILQ_FIRST(&sah->savtree_alive);
945 printf("%s: chosen SA(%p) for SP(%p)\n", __func__,
947 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
948 return (sav); /* return referenced SA */
952 *error = key_acquire(saidx, sp);
955 "%s: error %d returned from key_acquire()\n",
958 printf("%s: acquire SA for SP(%p), error %d\n",
959 __func__, sp, *error));
960 KEYDBG(IPSEC_DATA, kdebug_secasindex(saidx, NULL));
965 * allocating a usable SA entry for a *INBOUND* packet.
966 * Must call key_freesav() later.
967 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
968 * NULL: not found, or error occurred.
970 * According to RFC 2401 SA is uniquely identified by a triple SPI,
971 * destination address, and security protocol. But according to RFC 4301,
972 * SPI by itself suffices to specify an SA.
974 * Note that, however, we do need to keep source address in IPsec SA.
975 * IKE specification and PF_KEY specification do assume that we
976 * keep source address in IPsec SA. We see a tricky situation here.
979 key_allocsa(union sockaddr_union *dst, uint8_t proto, uint32_t spi)
981 SAHTREE_RLOCK_TRACKER;
982 struct secasvar *sav;
984 IPSEC_ASSERT(proto == IPPROTO_ESP || proto == IPPROTO_AH ||
985 proto == IPPROTO_IPCOMP, ("unexpected security protocol %u",
989 LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) {
994 * We use single SPI namespace for all protocols, so it is
995 * impossible to have SPI duplicates in the SAVHASH.
998 if (sav->state != SADB_SASTATE_LARVAL &&
999 sav->sah->saidx.proto == proto &&
1000 key_sockaddrcmp(&dst->sa,
1001 &sav->sah->saidx.dst.sa, 0) == 0)
1010 char buf[IPSEC_ADDRSTRLEN];
1011 printf("%s: SA not found for spi %u proto %u dst %s\n",
1012 __func__, ntohl(spi), proto, ipsec_address(dst, buf,
1016 printf("%s: return SA(%p)\n", __func__, sav));
1017 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
1023 key_allocsa_tunnel(union sockaddr_union *src, union sockaddr_union *dst,
1026 SAHTREE_RLOCK_TRACKER;
1027 struct secasindex saidx;
1028 struct secashead *sah;
1029 struct secasvar *sav;
1031 IPSEC_ASSERT(src != NULL, ("null src address"));
1032 IPSEC_ASSERT(dst != NULL, ("null dst address"));
1034 KEY_SETSECASIDX(proto, IPSEC_MODE_TUNNEL, 0, &src->sa,
1039 LIST_FOREACH(sah, SAHADDRHASH_HASH(&saidx), addrhash) {
1040 if (IPSEC_MODE_TUNNEL != sah->saidx.mode)
1042 if (proto != sah->saidx.proto)
1044 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0)
1046 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0)
1048 /* XXXAE: is key_preferred_oldsa reasonably?*/
1049 if (V_key_preferred_oldsa)
1050 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
1052 sav = TAILQ_FIRST(&sah->savtree_alive);
1060 printf("%s: return SA(%p)\n", __func__, sav));
1062 KEYDBG(IPSEC_DATA, kdebug_secasv(sav));
1067 * Must be called after calling key_allocsp().
1070 key_freesp(struct secpolicy **spp)
1072 struct secpolicy *sp = *spp;
1074 IPSEC_ASSERT(sp != NULL, ("null sp"));
1075 if (SP_DELREF(sp) == 0)
1079 printf("%s: last reference to SP(%p)\n", __func__, sp));
1080 KEYDBG(IPSEC_DATA, kdebug_secpolicy(sp));
1083 while (sp->tcount > 0)
1084 ipsec_delisr(sp->req[--sp->tcount]);
1085 free(sp, M_IPSEC_SP);
1089 key_unlink(struct secpolicy *sp)
1092 IPSEC_ASSERT(sp->spidx.dir == IPSEC_DIR_INBOUND ||
1093 sp->spidx.dir == IPSEC_DIR_OUTBOUND,
1094 ("invalid direction %u", sp->spidx.dir));
1095 SPTREE_UNLOCK_ASSERT();
1098 printf("%s: SP(%p)\n", __func__, sp));
1100 if (sp->state != IPSEC_SPSTATE_ALIVE) {
1101 /* SP is already unlinked */
1105 sp->state = IPSEC_SPSTATE_DEAD;
1106 TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain);
1107 LIST_REMOVE(sp, idhash);
1114 * insert a secpolicy into the SP database. Lower priorities first
1117 key_insertsp(struct secpolicy *newsp)
1119 struct secpolicy *sp;
1121 SPTREE_WLOCK_ASSERT();
1122 TAILQ_FOREACH(sp, &V_sptree[newsp->spidx.dir], chain) {
1123 if (newsp->priority < sp->priority) {
1124 TAILQ_INSERT_BEFORE(sp, newsp, chain);
1128 TAILQ_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, chain);
1130 LIST_INSERT_HEAD(SPHASH_HASH(newsp->id), newsp, idhash);
1131 newsp->state = IPSEC_SPSTATE_ALIVE;
1136 * Insert a bunch of VTI secpolicies into the SPDB.
1137 * We keep VTI policies in the separate list due to following reasons:
1138 * 1) they should be immutable to user's or some deamon's attempts to
1139 * delete. The only way delete such policies - destroy or unconfigure
1140 * corresponding virtual inteface.
1141 * 2) such policies have traffic selector that matches all traffic per
1143 * Since all VTI policies have the same priority, we don't care about
1147 key_register_ifnet(struct secpolicy **spp, u_int count)
1154 * First of try to acquire id for each SP.
1156 for (i = 0; i < count; i++) {
1157 IPSEC_ASSERT(spp[i]->spidx.dir == IPSEC_DIR_INBOUND ||
1158 spp[i]->spidx.dir == IPSEC_DIR_OUTBOUND,
1159 ("invalid direction %u", spp[i]->spidx.dir));
1161 if ((spp[i]->id = key_getnewspid()) == 0) {
1166 for (i = 0; i < count; i++) {
1167 TAILQ_INSERT_TAIL(&V_sptree_ifnet[spp[i]->spidx.dir],
1170 * NOTE: despite the fact that we keep VTI SP in the
1171 * separate list, SPHASH contains policies from both
1172 * sources. Thus SADB_X_SPDGET will correctly return
1173 * SP by id, because it uses SPHASH for lookups.
1175 LIST_INSERT_HEAD(SPHASH_HASH(spp[i]->id), spp[i], idhash);
1176 spp[i]->state = IPSEC_SPSTATE_IFNET;
1180 * Notify user processes about new SP.
1182 for (i = 0; i < count; i++) {
1183 m = key_setdumpsp(spp[i], SADB_X_SPDADD, 0, 0);
1185 key_sendup_mbuf(NULL, m, KEY_SENDUP_ALL);
1191 key_unregister_ifnet(struct secpolicy **spp, u_int count)
1197 for (i = 0; i < count; i++) {
1198 IPSEC_ASSERT(spp[i]->spidx.dir == IPSEC_DIR_INBOUND ||
1199 spp[i]->spidx.dir == IPSEC_DIR_OUTBOUND,
1200 ("invalid direction %u", spp[i]->spidx.dir));
1202 if (spp[i]->state != IPSEC_SPSTATE_IFNET)
1204 spp[i]->state = IPSEC_SPSTATE_DEAD;
1205 TAILQ_REMOVE(&V_sptree_ifnet[spp[i]->spidx.dir],
1207 LIST_REMOVE(spp[i], idhash);
1211 for (i = 0; i < count; i++) {
1212 m = key_setdumpsp(spp[i], SADB_X_SPDDELETE, 0, 0);
1214 key_sendup_mbuf(NULL, m, KEY_SENDUP_ALL);
1219 * Must be called after calling key_allocsa().
1220 * This function is called by key_freesp() to free some SA allocated
1224 key_freesav(struct secasvar **psav)
1226 struct secasvar *sav = *psav;
1228 IPSEC_ASSERT(sav != NULL, ("null sav"));
1229 if (SAV_DELREF(sav) == 0)
1233 printf("%s: last reference to SA(%p)\n", __func__, sav));
1240 * Unlink SA from SAH and SPI hash under SAHTREE_WLOCK.
1241 * Expect that SA has extra reference due to lookup.
1242 * Release this references, also release SAH reference after unlink.
1245 key_unlinksav(struct secasvar *sav)
1247 struct secashead *sah;
1250 printf("%s: SA(%p)\n", __func__, sav));
1252 SAHTREE_UNLOCK_ASSERT();
1254 if (sav->state == SADB_SASTATE_DEAD) {
1255 /* SA is already unlinked */
1259 /* Unlink from SAH */
1260 if (sav->state == SADB_SASTATE_LARVAL)
1261 TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain);
1263 TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain);
1264 /* Unlink from SPI hash */
1265 LIST_REMOVE(sav, spihash);
1266 sav->state = SADB_SASTATE_DEAD;
1270 /* Since we are unlinked, release reference to SAH */
1274 /* %%% SPD management */
1277 * OUT: NULL : not found
1278 * others : found, pointer to a SP.
1280 static struct secpolicy *
1281 key_getsp(struct secpolicyindex *spidx)
1283 SPTREE_RLOCK_TRACKER;
1284 struct secpolicy *sp;
1286 IPSEC_ASSERT(spidx != NULL, ("null spidx"));
1289 TAILQ_FOREACH(sp, &V_sptree[spidx->dir], chain) {
1290 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1302 * OUT: NULL : not found
1303 * others : found, pointer to referenced SP.
1305 static struct secpolicy *
1306 key_getspbyid(uint32_t id)
1308 SPTREE_RLOCK_TRACKER;
1309 struct secpolicy *sp;
1312 LIST_FOREACH(sp, SPHASH_HASH(id), idhash) {
1325 struct secpolicy *sp;
1327 sp = malloc(sizeof(*sp), M_IPSEC_SP, M_NOWAIT | M_ZERO);
1333 struct ipsecrequest *
1337 return (malloc(sizeof(struct ipsecrequest), M_IPSEC_SR,
1338 M_NOWAIT | M_ZERO));
1342 ipsec_delisr(struct ipsecrequest *p)
1345 free(p, M_IPSEC_SR);
1349 * create secpolicy structure from sadb_x_policy structure.
1350 * NOTE: `state', `secpolicyindex' and 'id' in secpolicy structure
1351 * are not set, so must be set properly later.
1354 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1356 struct secpolicy *newsp;
1358 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0"));
1359 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len));
1361 if (len != PFKEY_EXTLEN(xpl0)) {
1362 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__));
1367 if ((newsp = key_newsp()) == NULL) {
1372 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1373 newsp->policy = xpl0->sadb_x_policy_type;
1374 newsp->priority = xpl0->sadb_x_policy_priority;
1378 switch (xpl0->sadb_x_policy_type) {
1379 case IPSEC_POLICY_DISCARD:
1380 case IPSEC_POLICY_NONE:
1381 case IPSEC_POLICY_ENTRUST:
1382 case IPSEC_POLICY_BYPASS:
1385 case IPSEC_POLICY_IPSEC:
1387 struct sadb_x_ipsecrequest *xisr;
1388 struct ipsecrequest *isr;
1391 /* validity check */
1392 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1393 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n",
1400 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1401 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1405 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1406 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest "
1407 "length.\n", __func__));
1413 if (newsp->tcount >= IPSEC_MAXREQ) {
1414 ipseclog((LOG_DEBUG,
1415 "%s: too many ipsecrequests.\n",
1422 /* allocate request buffer */
1423 /* NB: data structure is zero'd */
1424 isr = ipsec_newisr();
1426 ipseclog((LOG_DEBUG,
1427 "%s: No more memory.\n", __func__));
1433 newsp->req[newsp->tcount++] = isr;
1436 switch (xisr->sadb_x_ipsecrequest_proto) {
1439 case IPPROTO_IPCOMP:
1442 ipseclog((LOG_DEBUG,
1443 "%s: invalid proto type=%u\n", __func__,
1444 xisr->sadb_x_ipsecrequest_proto));
1446 *error = EPROTONOSUPPORT;
1450 (uint8_t)xisr->sadb_x_ipsecrequest_proto;
1452 switch (xisr->sadb_x_ipsecrequest_mode) {
1453 case IPSEC_MODE_TRANSPORT:
1454 case IPSEC_MODE_TUNNEL:
1456 case IPSEC_MODE_ANY:
1458 ipseclog((LOG_DEBUG,
1459 "%s: invalid mode=%u\n", __func__,
1460 xisr->sadb_x_ipsecrequest_mode));
1465 isr->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1467 switch (xisr->sadb_x_ipsecrequest_level) {
1468 case IPSEC_LEVEL_DEFAULT:
1469 case IPSEC_LEVEL_USE:
1470 case IPSEC_LEVEL_REQUIRE:
1472 case IPSEC_LEVEL_UNIQUE:
1473 /* validity check */
1475 * If range violation of reqid, kernel will
1476 * update it, don't refuse it.
1478 if (xisr->sadb_x_ipsecrequest_reqid
1479 > IPSEC_MANUAL_REQID_MAX) {
1480 ipseclog((LOG_DEBUG,
1481 "%s: reqid=%d range "
1482 "violation, updated by kernel.\n",
1484 xisr->sadb_x_ipsecrequest_reqid));
1485 xisr->sadb_x_ipsecrequest_reqid = 0;
1488 /* allocate new reqid id if reqid is zero. */
1489 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1491 if ((reqid = key_newreqid()) == 0) {
1496 isr->saidx.reqid = reqid;
1497 xisr->sadb_x_ipsecrequest_reqid = reqid;
1499 /* set it for manual keying. */
1501 xisr->sadb_x_ipsecrequest_reqid;
1506 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n",
1508 xisr->sadb_x_ipsecrequest_level));
1513 isr->level = xisr->sadb_x_ipsecrequest_level;
1515 /* set IP addresses if there */
1516 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1517 struct sockaddr *paddr;
1519 paddr = (struct sockaddr *)(xisr + 1);
1520 /* validity check */
1522 > sizeof(isr->saidx.src)) {
1523 ipseclog((LOG_DEBUG, "%s: invalid "
1524 "request address length.\n",
1530 bcopy(paddr, &isr->saidx.src, paddr->sa_len);
1531 paddr = (struct sockaddr *)((caddr_t)paddr +
1534 /* validity check */
1536 > sizeof(isr->saidx.dst)) {
1537 ipseclog((LOG_DEBUG, "%s: invalid "
1538 "request address length.\n",
1544 /* AF family should match */
1545 if (paddr->sa_family !=
1546 isr->saidx.src.sa.sa_family) {
1547 ipseclog((LOG_DEBUG, "%s: address "
1548 "family doesn't match.\n",
1554 bcopy(paddr, &isr->saidx.dst, paddr->sa_len);
1557 * Addresses for TUNNEL mode requests are
1560 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) {
1561 ipseclog((LOG_DEBUG, "%s: missing "
1562 "request addresses.\n", __func__));
1568 tlen -= xisr->sadb_x_ipsecrequest_len;
1570 /* validity check */
1572 ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n",
1579 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1580 + xisr->sadb_x_ipsecrequest_len);
1582 /* XXXAE: LARVAL SP */
1583 if (newsp->tcount < 1) {
1584 ipseclog((LOG_DEBUG, "%s: valid IPSEC transforms "
1585 "not found.\n", __func__));
1593 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
1606 static uint32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1608 if (auto_reqid == ~0)
1609 auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1613 /* XXX should be unique check */
1614 return (auto_reqid);
1618 * copy secpolicy struct to sadb_x_policy structure indicated.
1620 static struct mbuf *
1621 key_sp2mbuf(struct secpolicy *sp)
1626 tlen = key_getspreqmsglen(sp);
1627 m = m_get2(tlen, M_NOWAIT, MT_DATA, 0);
1632 if (key_sp2msg(sp, m->m_data, &tlen) != 0) {
1640 key_sp2msg(struct secpolicy *sp, void *request, size_t *len)
1642 struct sadb_x_ipsecrequest *xisr;
1643 struct sadb_x_policy *xpl;
1644 struct ipsecrequest *isr;
1649 IPSEC_ASSERT(sp != NULL, ("null policy"));
1651 xlen = sizeof(*xpl);
1656 bzero(request, *len);
1657 xpl = (struct sadb_x_policy *)request;
1658 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1659 xpl->sadb_x_policy_type = sp->policy;
1660 xpl->sadb_x_policy_dir = sp->spidx.dir;
1661 xpl->sadb_x_policy_id = sp->id;
1662 xpl->sadb_x_policy_priority = sp->priority;
1663 switch (sp->state) {
1664 case IPSEC_SPSTATE_IFNET:
1665 xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_IFNET;
1667 case IPSEC_SPSTATE_PCB:
1668 xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_PCB;
1671 xpl->sadb_x_policy_scope = IPSEC_POLICYSCOPE_GLOBAL;
1674 /* if is the policy for ipsec ? */
1675 if (sp->policy == IPSEC_POLICY_IPSEC) {
1676 p = (caddr_t)xpl + sizeof(*xpl);
1677 for (i = 0; i < sp->tcount; i++) {
1679 ilen = PFKEY_ALIGN8(sizeof(*xisr) +
1680 isr->saidx.src.sa.sa_len +
1681 isr->saidx.dst.sa.sa_len);
1685 /* Calculate needed size */
1688 xisr = (struct sadb_x_ipsecrequest *)p;
1689 xisr->sadb_x_ipsecrequest_len = ilen;
1690 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1691 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1692 xisr->sadb_x_ipsecrequest_level = isr->level;
1693 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1696 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len);
1697 p += isr->saidx.src.sa.sa_len;
1698 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len);
1699 p += isr->saidx.dst.sa.sa_len;
1702 xpl->sadb_x_policy_len = PFKEY_UNIT64(xlen);
1706 *len = sizeof(*xpl);
1710 /* m will not be freed nor modified */
1711 static struct mbuf *
1712 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1713 int ndeep, int nitem, ...)
1718 struct mbuf *result = NULL, *n;
1721 IPSEC_ASSERT(m != NULL, ("null mbuf"));
1722 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
1724 va_start(ap, nitem);
1725 for (i = 0; i < nitem; i++) {
1726 idx = va_arg(ap, int);
1727 if (idx < 0 || idx > SADB_EXT_MAX)
1729 /* don't attempt to pull empty extension */
1730 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1732 if (idx != SADB_EXT_RESERVED &&
1733 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1736 if (idx == SADB_EXT_RESERVED) {
1737 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1739 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len));
1741 MGETHDR(n, M_NOWAIT, MT_DATA);
1746 m_copydata(m, 0, sizeof(struct sadb_msg),
1748 } else if (i < ndeep) {
1749 len = mhp->extlen[idx];
1750 n = m_get2(len, M_NOWAIT, MT_DATA, 0);
1755 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1758 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1771 if ((result->m_flags & M_PKTHDR) != 0) {
1772 result->m_pkthdr.len = 0;
1773 for (n = result; n; n = n->m_next)
1774 result->m_pkthdr.len += n->m_len;
1786 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1787 * add an entry to SP database, when received
1788 * <base, address(SD), (lifetime(H),) policy>
1790 * Adding to SP database,
1792 * <base, address(SD), (lifetime(H),) policy>
1793 * to the socket which was send.
1795 * SPDADD set a unique policy entry.
1796 * SPDSETIDX like SPDADD without a part of policy requests.
1797 * SPDUPDATE replace a unique policy entry.
1799 * XXXAE: serialize this in PF_KEY to avoid races.
1800 * m will always be freed.
1803 key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
1805 struct secpolicyindex spidx;
1806 struct sadb_address *src0, *dst0;
1807 struct sadb_x_policy *xpl0, *xpl;
1808 struct sadb_lifetime *lft = NULL;
1809 struct secpolicy *newsp;
1812 IPSEC_ASSERT(so != NULL, ("null socket"));
1813 IPSEC_ASSERT(m != NULL, ("null mbuf"));
1814 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
1815 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
1817 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
1818 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
1819 SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY)) {
1820 ipseclog((LOG_DEBUG,
1821 "%s: invalid message: missing required header.\n",
1823 return key_senderror(so, m, EINVAL);
1825 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
1826 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) ||
1827 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
1828 ipseclog((LOG_DEBUG,
1829 "%s: invalid message: wrong header size.\n", __func__));
1830 return key_senderror(so, m, EINVAL);
1832 if (!SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD)) {
1833 if (SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_HARD)) {
1834 ipseclog((LOG_DEBUG,
1835 "%s: invalid message: wrong header size.\n",
1837 return key_senderror(so, m, EINVAL);
1839 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1842 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1843 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1844 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1846 /* check the direciton */
1847 switch (xpl0->sadb_x_policy_dir) {
1848 case IPSEC_DIR_INBOUND:
1849 case IPSEC_DIR_OUTBOUND:
1852 ipseclog((LOG_DEBUG, "%s: invalid SP direction.\n", __func__));
1853 return key_senderror(so, m, EINVAL);
1855 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1856 if (xpl0->sadb_x_policy_type != IPSEC_POLICY_DISCARD &&
1857 xpl0->sadb_x_policy_type != IPSEC_POLICY_NONE &&
1858 xpl0->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
1859 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
1860 return key_senderror(so, m, EINVAL);
1863 /* policy requests are mandatory when action is ipsec. */
1864 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC &&
1865 mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1866 ipseclog((LOG_DEBUG,
1867 "%s: policy requests required.\n", __func__));
1868 return key_senderror(so, m, EINVAL);
1871 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
1872 (struct sockaddr *)(dst0 + 1));
1874 src0->sadb_address_proto != dst0->sadb_address_proto) {
1875 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
1876 return key_senderror(so, m, error);
1879 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1882 src0->sadb_address_prefixlen,
1883 dst0->sadb_address_prefixlen,
1884 src0->sadb_address_proto,
1886 /* Checking there is SP already or not. */
1887 newsp = key_getsp(&spidx);
1888 if (newsp != NULL) {
1889 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1891 printf("%s: unlink SP(%p) for SPDUPDATE\n",
1893 KEYDBG(KEY_DATA, kdebug_secpolicy(newsp));
1898 ipseclog((LOG_DEBUG, "%s: a SP entry exists already.",
1900 return (key_senderror(so, m, EEXIST));
1904 /* allocate new SP entry */
1905 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1906 return key_senderror(so, m, error);
1909 newsp->lastused = newsp->created = time_second;
1910 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1911 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1912 bcopy(&spidx, &newsp->spidx, sizeof(spidx));
1914 /* XXXAE: there is race between key_getsp() and key_insertsp() */
1916 if ((newsp->id = key_getnewspid()) == 0) {
1919 return key_senderror(so, m, ENOBUFS);
1921 key_insertsp(newsp);
1925 printf("%s: SP(%p)\n", __func__, newsp));
1926 KEYDBG(KEY_DATA, kdebug_secpolicy(newsp));
1929 struct mbuf *n, *mpolicy;
1930 struct sadb_msg *newmsg;
1933 /* create new sadb_msg to reply. */
1935 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1936 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1937 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1939 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1941 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1944 return key_senderror(so, m, ENOBUFS);
1946 if (n->m_len < sizeof(*newmsg)) {
1947 n = m_pullup(n, sizeof(*newmsg));
1949 return key_senderror(so, m, ENOBUFS);
1951 newmsg = mtod(n, struct sadb_msg *);
1952 newmsg->sadb_msg_errno = 0;
1953 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1956 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1957 sizeof(*xpl), &off);
1958 if (mpolicy == NULL) {
1959 /* n is already freed */
1960 return key_senderror(so, m, ENOBUFS);
1962 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1963 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1965 return key_senderror(so, m, EINVAL);
1967 xpl->sadb_x_policy_id = newsp->id;
1970 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1975 * get new policy id.
1981 key_getnewspid(void)
1983 struct secpolicy *sp;
1985 int count = V_key_spi_trycnt; /* XXX */
1987 SPTREE_WLOCK_ASSERT();
1989 if (V_policy_id == ~0) /* overflowed */
1990 newid = V_policy_id = 1;
1992 newid = ++V_policy_id;
1993 LIST_FOREACH(sp, SPHASH_HASH(newid), idhash) {
1994 if (sp->id == newid)
2000 if (count == 0 || newid == 0) {
2001 ipseclog((LOG_DEBUG, "%s: failed to allocate policy id.\n",
2009 * SADB_SPDDELETE processing
2011 * <base, address(SD), policy(*)>
2012 * from the user(?), and set SADB_SASTATE_DEAD,
2014 * <base, address(SD), policy(*)>
2016 * policy(*) including direction of policy.
2018 * m will always be freed.
2021 key_spddelete(struct socket *so, struct mbuf *m,
2022 const struct sadb_msghdr *mhp)
2024 struct secpolicyindex spidx;
2025 struct sadb_address *src0, *dst0;
2026 struct sadb_x_policy *xpl0;
2027 struct secpolicy *sp;
2029 IPSEC_ASSERT(so != NULL, ("null so"));
2030 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2031 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2032 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2034 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
2035 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
2036 SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY)) {
2037 ipseclog((LOG_DEBUG,
2038 "%s: invalid message: missing required header.\n",
2040 return key_senderror(so, m, EINVAL);
2042 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
2043 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) ||
2044 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
2045 ipseclog((LOG_DEBUG,
2046 "%s: invalid message: wrong header size.\n", __func__));
2047 return key_senderror(so, m, EINVAL);
2050 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
2051 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
2052 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
2054 /* check the direciton */
2055 switch (xpl0->sadb_x_policy_dir) {
2056 case IPSEC_DIR_INBOUND:
2057 case IPSEC_DIR_OUTBOUND:
2060 ipseclog((LOG_DEBUG, "%s: invalid SP direction.\n", __func__));
2061 return key_senderror(so, m, EINVAL);
2063 /* Only DISCARD, NONE and IPSEC are allowed */
2064 if (xpl0->sadb_x_policy_type != IPSEC_POLICY_DISCARD &&
2065 xpl0->sadb_x_policy_type != IPSEC_POLICY_NONE &&
2066 xpl0->sadb_x_policy_type != IPSEC_POLICY_IPSEC) {
2067 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
2068 return key_senderror(so, m, EINVAL);
2070 if (key_checksockaddrs((struct sockaddr *)(src0 + 1),
2071 (struct sockaddr *)(dst0 + 1)) != 0 ||
2072 src0->sadb_address_proto != dst0->sadb_address_proto) {
2073 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
2074 return key_senderror(so, m, EINVAL);
2077 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2080 src0->sadb_address_prefixlen,
2081 dst0->sadb_address_prefixlen,
2082 src0->sadb_address_proto,
2085 /* Is there SP in SPD ? */
2086 if ((sp = key_getsp(&spidx)) == NULL) {
2087 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__));
2088 return key_senderror(so, m, EINVAL);
2091 /* save policy id to buffer to be returned. */
2092 xpl0->sadb_x_policy_id = sp->id;
2095 printf("%s: SP(%p)\n", __func__, sp));
2096 KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
2102 struct sadb_msg *newmsg;
2104 /* create new sadb_msg to reply. */
2105 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2106 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2108 return key_senderror(so, m, ENOBUFS);
2110 newmsg = mtod(n, struct sadb_msg *);
2111 newmsg->sadb_msg_errno = 0;
2112 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2115 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2120 * SADB_SPDDELETE2 processing
2123 * from the user(?), and set SADB_SASTATE_DEAD,
2127 * policy(*) including direction of policy.
2129 * m will always be freed.
2132 key_spddelete2(struct socket *so, struct mbuf *m,
2133 const struct sadb_msghdr *mhp)
2135 struct secpolicy *sp;
2138 IPSEC_ASSERT(so != NULL, ("null socket"));
2139 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2140 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2141 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2143 if (SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY) ||
2144 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
2145 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2147 return key_senderror(so, m, EINVAL);
2150 id = ((struct sadb_x_policy *)
2151 mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2153 /* Is there SP in SPD ? */
2154 if ((sp = key_getspbyid(id)) == NULL) {
2155 ipseclog((LOG_DEBUG, "%s: no SP found for id %u.\n",
2157 return key_senderror(so, m, EINVAL);
2161 printf("%s: SP(%p)\n", __func__, sp));
2162 KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
2164 if (sp->state != IPSEC_SPSTATE_DEAD) {
2165 ipseclog((LOG_DEBUG, "%s: failed to delete SP with id %u.\n",
2168 return (key_senderror(so, m, EACCES));
2173 struct mbuf *n, *nn;
2174 struct sadb_msg *newmsg;
2177 /* create new sadb_msg to reply. */
2178 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2180 MGETHDR(n, M_NOWAIT, MT_DATA);
2181 if (n && len > MHLEN) {
2182 if (!(MCLGET(n, M_NOWAIT))) {
2188 return key_senderror(so, m, ENOBUFS);
2194 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2195 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2197 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)",
2200 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2201 mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT);
2204 return key_senderror(so, m, ENOBUFS);
2207 n->m_pkthdr.len = 0;
2208 for (nn = n; nn; nn = nn->m_next)
2209 n->m_pkthdr.len += nn->m_len;
2211 newmsg = mtod(n, struct sadb_msg *);
2212 newmsg->sadb_msg_errno = 0;
2213 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2216 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2221 * SADB_X_SPDGET processing
2226 * <base, address(SD), policy>
2228 * policy(*) including direction of policy.
2230 * m will always be freed.
2233 key_spdget(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
2235 struct secpolicy *sp;
2239 IPSEC_ASSERT(so != NULL, ("null socket"));
2240 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2241 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2242 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2244 if (SADB_CHECKHDR(mhp, SADB_X_EXT_POLICY) ||
2245 SADB_CHECKLEN(mhp, SADB_X_EXT_POLICY)) {
2246 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2248 return key_senderror(so, m, EINVAL);
2251 id = ((struct sadb_x_policy *)
2252 mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2254 /* Is there SP in SPD ? */
2255 if ((sp = key_getspbyid(id)) == NULL) {
2256 ipseclog((LOG_DEBUG, "%s: no SP found for id %u.\n",
2258 return key_senderror(so, m, ENOENT);
2261 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq,
2262 mhp->msg->sadb_msg_pid);
2266 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2268 return key_senderror(so, m, ENOBUFS);
2272 * SADB_X_SPDACQUIRE processing.
2273 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2276 * to KMD, and expect to receive
2277 * <base> with SADB_X_SPDACQUIRE if error occurred,
2280 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2281 * policy(*) is without policy requests.
2284 * others: error number
2287 key_spdacquire(struct secpolicy *sp)
2289 struct mbuf *result = NULL, *m;
2290 struct secspacq *newspacq;
2292 IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
2293 IPSEC_ASSERT(sp->req == NULL, ("policy exists"));
2294 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC,
2295 ("policy not IPSEC %u", sp->policy));
2297 /* Get an entry to check whether sent message or not. */
2298 newspacq = key_getspacq(&sp->spidx);
2299 if (newspacq != NULL) {
2300 if (V_key_blockacq_count < newspacq->count) {
2301 /* reset counter and do send message. */
2302 newspacq->count = 0;
2304 /* increment counter and do nothing. */
2311 /* make new entry for blocking to send SADB_ACQUIRE. */
2312 newspacq = key_newspacq(&sp->spidx);
2313 if (newspacq == NULL)
2317 /* create new sadb_msg to reply. */
2318 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2324 result->m_pkthdr.len = 0;
2325 for (m = result; m; m = m->m_next)
2326 result->m_pkthdr.len += m->m_len;
2328 mtod(result, struct sadb_msg *)->sadb_msg_len =
2329 PFKEY_UNIT64(result->m_pkthdr.len);
2331 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2335 * SADB_SPDFLUSH processing
2338 * from the user, and free all entries in secpctree.
2342 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2344 * m will always be freed.
2347 key_spdflush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
2349 struct secpolicy_queue drainq;
2350 struct sadb_msg *newmsg;
2351 struct secpolicy *sp, *nextsp;
2354 IPSEC_ASSERT(so != NULL, ("null socket"));
2355 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2356 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2357 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2359 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2360 return key_senderror(so, m, EINVAL);
2362 TAILQ_INIT(&drainq);
2364 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2365 TAILQ_CONCAT(&drainq, &V_sptree[dir], chain);
2368 * We need to set state to DEAD for each policy to be sure,
2369 * that another thread won't try to unlink it.
2370 * Also remove SP from sphash.
2372 TAILQ_FOREACH(sp, &drainq, chain) {
2373 sp->state = IPSEC_SPSTATE_DEAD;
2374 LIST_REMOVE(sp, idhash);
2378 sp = TAILQ_FIRST(&drainq);
2379 while (sp != NULL) {
2380 nextsp = TAILQ_NEXT(sp, chain);
2385 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2386 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
2387 return key_senderror(so, m, ENOBUFS);
2393 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2394 newmsg = mtod(m, struct sadb_msg *);
2395 newmsg->sadb_msg_errno = 0;
2396 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2398 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2402 key_satype2scopemask(uint8_t satype)
2405 if (satype == IPSEC_POLICYSCOPE_ANY)
2410 * SADB_SPDDUMP processing
2413 * from the user, and dump all SP leaves and send,
2418 * sadb_msg_satype is considered as mask of policy scopes.
2419 * m will always be freed.
2422 key_spddump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
2424 SPTREE_RLOCK_TRACKER;
2425 struct secpolicy *sp;
2430 IPSEC_ASSERT(so != NULL, ("null socket"));
2431 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2432 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2433 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2435 /* search SPD entry and get buffer size. */
2437 scope = key_satype2scopemask(mhp->msg->sadb_msg_satype);
2439 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2440 if (scope & IPSEC_POLICYSCOPE_GLOBAL) {
2441 TAILQ_FOREACH(sp, &V_sptree[dir], chain)
2444 if (scope & IPSEC_POLICYSCOPE_IFNET) {
2445 TAILQ_FOREACH(sp, &V_sptree_ifnet[dir], chain)
2452 return key_senderror(so, m, ENOENT);
2455 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2456 if (scope & IPSEC_POLICYSCOPE_GLOBAL) {
2457 TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
2459 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2460 mhp->msg->sadb_msg_pid);
2463 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2466 if (scope & IPSEC_POLICYSCOPE_IFNET) {
2467 TAILQ_FOREACH(sp, &V_sptree_ifnet[dir], chain) {
2469 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2470 mhp->msg->sadb_msg_pid);
2473 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2483 static struct mbuf *
2484 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2487 struct mbuf *result = NULL, *m;
2488 struct seclifetime lt;
2490 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2495 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2496 &sp->spidx.src.sa, sp->spidx.prefs,
2497 sp->spidx.ul_proto);
2502 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2503 &sp->spidx.dst.sa, sp->spidx.prefd,
2504 sp->spidx.ul_proto);
2509 m = key_sp2mbuf(sp);
2515 lt.addtime=sp->created;
2516 lt.usetime= sp->lastused;
2517 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT);
2522 lt.addtime=sp->lifetime;
2523 lt.usetime= sp->validtime;
2524 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD);
2530 if ((result->m_flags & M_PKTHDR) == 0)
2533 if (result->m_len < sizeof(struct sadb_msg)) {
2534 result = m_pullup(result, sizeof(struct sadb_msg));
2539 result->m_pkthdr.len = 0;
2540 for (m = result; m; m = m->m_next)
2541 result->m_pkthdr.len += m->m_len;
2543 mtod(result, struct sadb_msg *)->sadb_msg_len =
2544 PFKEY_UNIT64(result->m_pkthdr.len);
2553 * get PFKEY message length for security policy and request.
2556 key_getspreqmsglen(struct secpolicy *sp)
2561 tlen = sizeof(struct sadb_x_policy);
2562 /* if is the policy for ipsec ? */
2563 if (sp->policy != IPSEC_POLICY_IPSEC)
2566 /* get length of ipsec requests */
2567 for (i = 0; i < sp->tcount; i++) {
2568 len = sizeof(struct sadb_x_ipsecrequest)
2569 + sp->req[i]->saidx.src.sa.sa_len
2570 + sp->req[i]->saidx.dst.sa.sa_len;
2572 tlen += PFKEY_ALIGN8(len);
2578 * SADB_SPDEXPIRE processing
2580 * <base, address(SD), lifetime(CH), policy>
2584 * others : error number
2587 key_spdexpire(struct secpolicy *sp)
2589 struct sadb_lifetime *lt;
2590 struct mbuf *result = NULL, *m;
2591 int len, error = -1;
2593 IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
2596 printf("%s: SP(%p)\n", __func__, sp));
2597 KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
2599 /* set msg header */
2600 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2607 /* create lifetime extension (current and hard) */
2608 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2609 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
2616 bzero(mtod(m, caddr_t), len);
2617 lt = mtod(m, struct sadb_lifetime *);
2618 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2619 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2620 lt->sadb_lifetime_allocations = 0;
2621 lt->sadb_lifetime_bytes = 0;
2622 lt->sadb_lifetime_addtime = sp->created;
2623 lt->sadb_lifetime_usetime = sp->lastused;
2624 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2625 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2626 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2627 lt->sadb_lifetime_allocations = 0;
2628 lt->sadb_lifetime_bytes = 0;
2629 lt->sadb_lifetime_addtime = sp->lifetime;
2630 lt->sadb_lifetime_usetime = sp->validtime;
2633 /* set sadb_address for source */
2634 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2636 sp->spidx.prefs, sp->spidx.ul_proto);
2643 /* set sadb_address for destination */
2644 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2646 sp->spidx.prefd, sp->spidx.ul_proto);
2654 m = key_sp2mbuf(sp);
2661 if ((result->m_flags & M_PKTHDR) == 0) {
2666 if (result->m_len < sizeof(struct sadb_msg)) {
2667 result = m_pullup(result, sizeof(struct sadb_msg));
2668 if (result == NULL) {
2674 result->m_pkthdr.len = 0;
2675 for (m = result; m; m = m->m_next)
2676 result->m_pkthdr.len += m->m_len;
2678 mtod(result, struct sadb_msg *)->sadb_msg_len =
2679 PFKEY_UNIT64(result->m_pkthdr.len);
2681 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2689 /* %%% SAD management */
2691 * allocating and initialize new SA head.
2692 * OUT: NULL : failure due to the lack of memory.
2693 * others : pointer to new SA head.
2695 static struct secashead *
2696 key_newsah(struct secasindex *saidx)
2698 struct secashead *sah;
2700 sah = malloc(sizeof(struct secashead), M_IPSEC_SAH,
2703 PFKEYSTAT_INC(in_nomem);
2706 TAILQ_INIT(&sah->savtree_larval);
2707 TAILQ_INIT(&sah->savtree_alive);
2708 sah->saidx = *saidx;
2709 sah->state = SADB_SASTATE_DEAD;
2713 printf("%s: SAH(%p)\n", __func__, sah));
2714 KEYDBG(KEY_DATA, kdebug_secash(sah, NULL));
2719 key_freesah(struct secashead **psah)
2721 struct secashead *sah = *psah;
2723 if (SAH_DELREF(sah) == 0)
2727 printf("%s: last reference to SAH(%p)\n", __func__, sah));
2728 KEYDBG(KEY_DATA, kdebug_secash(sah, NULL));
2735 key_delsah(struct secashead *sah)
2737 IPSEC_ASSERT(sah != NULL, ("NULL sah"));
2738 IPSEC_ASSERT(sah->state == SADB_SASTATE_DEAD,
2739 ("Attempt to free non DEAD SAH %p", sah));
2740 IPSEC_ASSERT(TAILQ_EMPTY(&sah->savtree_larval),
2741 ("Attempt to free SAH %p with LARVAL SA", sah));
2742 IPSEC_ASSERT(TAILQ_EMPTY(&sah->savtree_alive),
2743 ("Attempt to free SAH %p with ALIVE SA", sah));
2745 free(sah, M_IPSEC_SAH);
2749 * allocating a new SA for key_add() and key_getspi() call,
2750 * and copy the values of mhp into new buffer.
2751 * When SAD message type is SADB_GETSPI set SA state to LARVAL.
2752 * For SADB_ADD create and initialize SA with MATURE state.
2754 * others : pointer to new secasvar.
2756 static struct secasvar *
2757 key_newsav(const struct sadb_msghdr *mhp, struct secasindex *saidx,
2758 uint32_t spi, int *errp)
2760 struct secashead *sah;
2761 struct secasvar *sav;
2764 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2765 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2766 IPSEC_ASSERT(mhp->msg->sadb_msg_type == SADB_GETSPI ||
2767 mhp->msg->sadb_msg_type == SADB_ADD, ("wrong message type"));
2771 /* check SPI value */
2772 switch (saidx->proto) {
2776 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values
2777 * 1-255 reserved by IANA for future use,
2778 * 0 for implementation specific, local use.
2780 if (ntohl(spi) <= 255) {
2781 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n",
2782 __func__, ntohl(spi)));
2789 sav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT | M_ZERO);
2794 sav->lock = malloc(sizeof(struct mtx), M_IPSEC_MISC,
2796 if (sav->lock == NULL) {
2800 mtx_init(sav->lock, "ipsec association", NULL, MTX_DEF);
2801 sav->lft_c = uma_zalloc(V_key_lft_zone, M_NOWAIT);
2802 if (sav->lft_c == NULL) {
2806 counter_u64_zero(sav->lft_c_allocations);
2807 counter_u64_zero(sav->lft_c_bytes);
2810 sav->seq = mhp->msg->sadb_msg_seq;
2811 sav->state = SADB_SASTATE_LARVAL;
2812 sav->pid = (pid_t)mhp->msg->sadb_msg_pid;
2815 sah = key_getsah(saidx);
2817 /* create a new SA index */
2818 sah = key_newsah(saidx);
2820 ipseclog((LOG_DEBUG,
2821 "%s: No more memory.\n", __func__));
2830 if (mhp->msg->sadb_msg_type == SADB_GETSPI) {
2831 sav->created = time_second;
2832 } else if (sav->state == SADB_SASTATE_LARVAL) {
2834 * Do not call key_setsaval() second time in case
2835 * of `goto again`. We will have MATURE state.
2837 *errp = key_setsaval(sav, mhp);
2840 sav->state = SADB_SASTATE_MATURE;
2845 * Check that existing SAH wasn't unlinked.
2846 * Since we didn't hold the SAHTREE lock, it is possible,
2847 * that callout handler or key_flush() or key_delete() could
2850 if (isnew == 0 && sah->state == SADB_SASTATE_DEAD) {
2852 key_freesah(&sah); /* reference from key_getsah() */
2857 * Add new SAH into SADB.
2859 * XXXAE: we can serialize key_add and key_getspi calls, so
2860 * several threads will not fight in the race.
2861 * Otherwise we should check under SAHTREE lock, that this
2862 * SAH would not added twice.
2864 TAILQ_INSERT_HEAD(&V_sahtree, sah, chain);
2865 /* Add new SAH into hash by addresses */
2866 LIST_INSERT_HEAD(SAHADDRHASH_HASH(saidx), sah, addrhash);
2867 /* Now we are linked in the chain */
2868 sah->state = SADB_SASTATE_MATURE;
2870 * SAV references this new SAH.
2871 * In case of existing SAH we reuse reference
2872 * from key_getsah().
2876 /* Link SAV with SAH */
2877 if (sav->state == SADB_SASTATE_MATURE)
2878 TAILQ_INSERT_HEAD(&sah->savtree_alive, sav, chain);
2880 TAILQ_INSERT_HEAD(&sah->savtree_larval, sav, chain);
2881 /* Add SAV into SPI hash */
2882 LIST_INSERT_HEAD(SAVHASH_HASH(sav->spi), sav, spihash);
2884 *errp = 0; /* success */
2888 if (sav->lock != NULL) {
2889 mtx_destroy(sav->lock);
2890 free(sav->lock, M_IPSEC_MISC);
2892 if (sav->lft_c != NULL)
2893 uma_zfree(V_key_lft_zone, sav->lft_c);
2894 free(sav, M_IPSEC_SA), sav = NULL;
2898 if (*errp == ENOBUFS) {
2899 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
2901 PFKEYSTAT_INC(in_nomem);
2908 * free() SA variable entry.
2911 key_cleansav(struct secasvar *sav)
2914 if (sav->natt != NULL) {
2915 free(sav->natt, M_IPSEC_MISC);
2918 if (sav->flags & SADB_X_EXT_F_CLONED)
2921 * Cleanup xform state. Note that zeroize'ing causes the
2922 * keys to be cleared; otherwise we must do it ourself.
2924 if (sav->tdb_xform != NULL) {
2925 sav->tdb_xform->xf_zeroize(sav);
2926 sav->tdb_xform = NULL;
2928 if (sav->key_auth != NULL)
2929 bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth));
2930 if (sav->key_enc != NULL)
2931 bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc));
2933 if (sav->key_auth != NULL) {
2934 if (sav->key_auth->key_data != NULL)
2935 free(sav->key_auth->key_data, M_IPSEC_MISC);
2936 free(sav->key_auth, M_IPSEC_MISC);
2937 sav->key_auth = NULL;
2939 if (sav->key_enc != NULL) {
2940 if (sav->key_enc->key_data != NULL)
2941 free(sav->key_enc->key_data, M_IPSEC_MISC);
2942 free(sav->key_enc, M_IPSEC_MISC);
2943 sav->key_enc = NULL;
2945 if (sav->replay != NULL) {
2946 if (sav->replay->bitmap != NULL)
2947 free(sav->replay->bitmap, M_IPSEC_MISC);
2948 free(sav->replay, M_IPSEC_MISC);
2951 if (sav->lft_h != NULL) {
2952 free(sav->lft_h, M_IPSEC_MISC);
2955 if (sav->lft_s != NULL) {
2956 free(sav->lft_s, M_IPSEC_MISC);
2962 * free() SA variable entry.
2965 key_delsav(struct secasvar *sav)
2967 IPSEC_ASSERT(sav != NULL, ("null sav"));
2968 IPSEC_ASSERT(sav->state == SADB_SASTATE_DEAD,
2969 ("attempt to free non DEAD SA %p", sav));
2970 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0",
2974 * SA must be unlinked from the chain and hashtbl.
2975 * If SA was cloned, we leave all fields untouched,
2976 * except NAT-T config.
2979 if ((sav->flags & SADB_X_EXT_F_CLONED) == 0) {
2980 mtx_destroy(sav->lock);
2981 free(sav->lock, M_IPSEC_MISC);
2982 uma_zfree(V_key_lft_zone, sav->lft_c);
2984 free(sav, M_IPSEC_SA);
2991 * others : found, referenced pointer to a SAH.
2993 static struct secashead *
2994 key_getsah(struct secasindex *saidx)
2996 SAHTREE_RLOCK_TRACKER;
2997 struct secashead *sah;
3000 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
3001 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID) != 0) {
3011 * Check not to be duplicated SPI.
3014 * 1 : found SA with given SPI.
3017 key_checkspidup(uint32_t spi)
3019 SAHTREE_RLOCK_TRACKER;
3020 struct secasvar *sav;
3022 /* Assume SPI is in network byte order */
3024 LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) {
3025 if (sav->spi == spi)
3029 return (sav != NULL);
3036 * others : found, referenced pointer to a SA.
3038 static struct secasvar *
3039 key_getsavbyspi(uint32_t spi)
3041 SAHTREE_RLOCK_TRACKER;
3042 struct secasvar *sav;
3044 /* Assume SPI is in network byte order */
3046 LIST_FOREACH(sav, SAVHASH_HASH(spi), spihash) {
3047 if (sav->spi != spi)
3057 key_updatelifetimes(struct secasvar *sav, const struct sadb_msghdr *mhp)
3059 struct seclifetime *lft_h, *lft_s, *tmp;
3061 /* Lifetime extension is optional, check that it is present. */
3062 if (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
3063 SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) {
3065 * In case of SADB_UPDATE we may need to change
3066 * existing lifetimes.
3068 if (sav->state == SADB_SASTATE_MATURE) {
3069 lft_h = lft_s = NULL;
3074 /* Both HARD and SOFT extensions must present */
3075 if ((SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
3076 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) ||
3077 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) &&
3078 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) {
3079 ipseclog((LOG_DEBUG,
3080 "%s: invalid message: missing required header.\n",
3084 if (SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_HARD) ||
3085 SADB_CHECKLEN(mhp, SADB_EXT_LIFETIME_SOFT)) {
3086 ipseclog((LOG_DEBUG,
3087 "%s: invalid message: wrong header size.\n", __func__));
3090 lft_h = key_dup_lifemsg((const struct sadb_lifetime *)
3091 mhp->ext[SADB_EXT_LIFETIME_HARD], M_IPSEC_MISC);
3092 if (lft_h == NULL) {
3093 PFKEYSTAT_INC(in_nomem);
3094 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3097 lft_s = key_dup_lifemsg((const struct sadb_lifetime *)
3098 mhp->ext[SADB_EXT_LIFETIME_SOFT], M_IPSEC_MISC);
3099 if (lft_s == NULL) {
3100 PFKEYSTAT_INC(in_nomem);
3101 free(lft_h, M_IPSEC_MISC);
3102 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3106 if (sav->state != SADB_SASTATE_LARVAL) {
3108 * key_update() holds reference to this SA,
3109 * so it won't be deleted in meanwhile.
3119 SECASVAR_UNLOCK(sav);
3121 free(lft_h, M_IPSEC_MISC);
3123 free(lft_s, M_IPSEC_MISC);
3126 /* We can update lifetime without holding a lock */
3127 IPSEC_ASSERT(sav->lft_h == NULL, ("lft_h is already initialized\n"));
3128 IPSEC_ASSERT(sav->lft_s == NULL, ("lft_s is already initialized\n"));
3135 * copy SA values from PF_KEY message except *SPI, SEQ, PID and TYPE*.
3136 * You must update these if need. Expects only LARVAL SAs.
3141 key_setsaval(struct secasvar *sav, const struct sadb_msghdr *mhp)
3143 const struct sadb_sa *sa0;
3144 const struct sadb_key *key0;
3149 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
3150 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
3151 IPSEC_ASSERT(sav->state == SADB_SASTATE_LARVAL,
3152 ("Attempt to update non LARVAL SA"));
3155 error = key_setident(sav->sah, mhp);
3160 if (!SADB_CHECKHDR(mhp, SADB_EXT_SA)) {
3161 if (SADB_CHECKLEN(mhp, SADB_EXT_SA)) {
3165 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
3166 sav->alg_auth = sa0->sadb_sa_auth;
3167 sav->alg_enc = sa0->sadb_sa_encrypt;
3168 sav->flags = sa0->sadb_sa_flags;
3169 if ((sav->flags & SADB_KEY_FLAGS_MAX) != sav->flags) {
3170 ipseclog((LOG_DEBUG,
3171 "%s: invalid sa_flags 0x%08x.\n", __func__,
3177 /* Optional replay window */
3179 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0)
3180 replay = sa0->sadb_sa_replay;
3181 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_SA_REPLAY)) {
3182 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA_REPLAY)) {
3186 replay = ((const struct sadb_x_sa_replay *)
3187 mhp->ext[SADB_X_EXT_SA_REPLAY])->sadb_x_sa_replay_replay;
3189 if (replay > UINT32_MAX - 32) {
3190 ipseclog((LOG_DEBUG,
3191 "%s: replay window too big.\n", __func__));
3196 replay = (replay + 7) >> 3;
3199 sav->replay = malloc(sizeof(struct secreplay), M_IPSEC_MISC,
3201 if (sav->replay == NULL) {
3202 PFKEYSTAT_INC(in_nomem);
3203 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3210 /* number of 32b blocks to be allocated */
3211 uint32_t bitmap_size;
3214 * - the allocated replay window size must be
3216 * - use an extra 32b block as a redundant window.
3219 while (replay + 4 > bitmap_size)
3221 bitmap_size = bitmap_size / 4;
3223 sav->replay->bitmap = malloc(
3224 bitmap_size * sizeof(uint32_t), M_IPSEC_MISC,
3226 if (sav->replay->bitmap == NULL) {
3227 PFKEYSTAT_INC(in_nomem);
3228 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3233 sav->replay->bitmap_size = bitmap_size;
3234 sav->replay->wsize = replay;
3238 /* Authentication keys */
3239 if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH)) {
3240 if (SADB_CHECKLEN(mhp, SADB_EXT_KEY_AUTH)) {
3245 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
3246 len = mhp->extlen[SADB_EXT_KEY_AUTH];
3247 switch (mhp->msg->sadb_msg_satype) {
3248 case SADB_SATYPE_AH:
3249 case SADB_SATYPE_ESP:
3250 case SADB_X_SATYPE_TCPSIGNATURE:
3251 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3252 sav->alg_auth != SADB_X_AALG_NULL)
3255 case SADB_X_SATYPE_IPCOMP:
3261 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n",
3266 sav->key_auth = key_dup_keymsg(key0, len, M_IPSEC_MISC);
3267 if (sav->key_auth == NULL ) {
3268 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3270 PFKEYSTAT_INC(in_nomem);
3276 /* Encryption key */
3277 if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT)) {
3278 if (SADB_CHECKLEN(mhp, SADB_EXT_KEY_ENCRYPT)) {
3283 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
3284 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
3285 switch (mhp->msg->sadb_msg_satype) {
3286 case SADB_SATYPE_ESP:
3287 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3288 sav->alg_enc != SADB_EALG_NULL) {
3292 sav->key_enc = key_dup_keymsg(key0, len, M_IPSEC_MISC);
3293 if (sav->key_enc == NULL) {
3294 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3296 PFKEYSTAT_INC(in_nomem);
3301 case SADB_X_SATYPE_IPCOMP:
3302 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3304 sav->key_enc = NULL; /*just in case*/
3306 case SADB_SATYPE_AH:
3307 case SADB_X_SATYPE_TCPSIGNATURE:
3313 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n",
3321 switch (mhp->msg->sadb_msg_satype) {
3322 case SADB_SATYPE_AH:
3323 if (sav->flags & SADB_X_EXT_DERIV) {
3324 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
3325 "given to AH SA.\n", __func__));
3329 if (sav->alg_enc != SADB_EALG_NONE) {
3330 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3331 "mismated.\n", __func__));
3335 error = xform_init(sav, XF_AH);
3337 case SADB_SATYPE_ESP:
3338 if ((sav->flags & (SADB_X_EXT_OLD | SADB_X_EXT_DERIV)) ==
3339 (SADB_X_EXT_OLD | SADB_X_EXT_DERIV)) {
3340 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
3341 "given to old-esp.\n", __func__));
3345 error = xform_init(sav, XF_ESP);
3347 case SADB_X_SATYPE_IPCOMP:
3348 if (sav->alg_auth != SADB_AALG_NONE) {
3349 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3350 "mismated.\n", __func__));
3354 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0 &&
3355 ntohl(sav->spi) >= 0x10000) {
3356 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n",
3361 error = xform_init(sav, XF_IPCOMP);
3363 case SADB_X_SATYPE_TCPSIGNATURE:
3364 if (sav->alg_enc != SADB_EALG_NONE) {
3365 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3366 "mismated.\n", __func__));
3370 error = xform_init(sav, XF_TCPSIGNATURE);
3373 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__));
3374 error = EPROTONOSUPPORT;
3378 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n",
3379 __func__, mhp->msg->sadb_msg_satype));
3383 /* Handle NAT-T headers */
3384 error = key_setnatt(sav, mhp);
3388 /* Initialize lifetime for CURRENT */
3390 sav->created = time_second;
3392 /* lifetimes for HARD and SOFT */
3393 error = key_updatelifetimes(sav, mhp);
3402 * subroutine for SADB_GET and SADB_DUMP.
3404 static struct mbuf *
3405 key_setdumpsa(struct secasvar *sav, uint8_t type, uint8_t satype,
3406 uint32_t seq, uint32_t pid)
3408 struct seclifetime lft_c;
3409 struct mbuf *result = NULL, *tres = NULL, *m;
3410 int i, dumporder[] = {
3411 SADB_EXT_SA, SADB_X_EXT_SA2, SADB_X_EXT_SA_REPLAY,
3412 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3413 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3414 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY,
3415 SADB_EXT_KEY_AUTH, SADB_EXT_KEY_ENCRYPT,
3416 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST,
3417 SADB_EXT_SENSITIVITY,
3418 SADB_X_EXT_NAT_T_TYPE,
3419 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT,
3420 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR,
3421 SADB_X_EXT_NAT_T_FRAG,
3423 uint32_t replay_count;
3425 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3430 for (i = nitems(dumporder) - 1; i >= 0; i--) {
3432 switch (dumporder[i]) {
3434 m = key_setsadbsa(sav);
3439 case SADB_X_EXT_SA2:
3441 replay_count = sav->replay ? sav->replay->count : 0;
3442 SECASVAR_UNLOCK(sav);
3443 m = key_setsadbxsa2(sav->sah->saidx.mode, replay_count,
3444 sav->sah->saidx.reqid);
3449 case SADB_X_EXT_SA_REPLAY:
3450 if (sav->replay == NULL ||
3451 sav->replay->wsize <= UINT8_MAX)
3454 m = key_setsadbxsareplay(sav->replay->wsize);
3459 case SADB_EXT_ADDRESS_SRC:
3460 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3461 &sav->sah->saidx.src.sa,
3462 FULLMASK, IPSEC_ULPROTO_ANY);
3467 case SADB_EXT_ADDRESS_DST:
3468 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3469 &sav->sah->saidx.dst.sa,
3470 FULLMASK, IPSEC_ULPROTO_ANY);
3475 case SADB_EXT_KEY_AUTH:
3478 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH);
3483 case SADB_EXT_KEY_ENCRYPT:
3486 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT);
3491 case SADB_EXT_LIFETIME_CURRENT:
3492 lft_c.addtime = sav->created;
3493 lft_c.allocations = (uint32_t)counter_u64_fetch(
3494 sav->lft_c_allocations);
3495 lft_c.bytes = counter_u64_fetch(sav->lft_c_bytes);
3496 lft_c.usetime = sav->firstused;
3497 m = key_setlifetime(&lft_c, SADB_EXT_LIFETIME_CURRENT);
3502 case SADB_EXT_LIFETIME_HARD:
3505 m = key_setlifetime(sav->lft_h,
3506 SADB_EXT_LIFETIME_HARD);
3511 case SADB_EXT_LIFETIME_SOFT:
3514 m = key_setlifetime(sav->lft_s,
3515 SADB_EXT_LIFETIME_SOFT);
3521 case SADB_X_EXT_NAT_T_TYPE:
3522 if (sav->natt == NULL)
3524 m = key_setsadbxtype(UDP_ENCAP_ESPINUDP);
3529 case SADB_X_EXT_NAT_T_DPORT:
3530 if (sav->natt == NULL)
3532 m = key_setsadbxport(sav->natt->dport,
3533 SADB_X_EXT_NAT_T_DPORT);
3538 case SADB_X_EXT_NAT_T_SPORT:
3539 if (sav->natt == NULL)
3541 m = key_setsadbxport(sav->natt->sport,
3542 SADB_X_EXT_NAT_T_SPORT);
3547 case SADB_X_EXT_NAT_T_OAI:
3548 if (sav->natt == NULL ||
3549 (sav->natt->flags & IPSEC_NATT_F_OAI) == 0)
3551 m = key_setsadbaddr(SADB_X_EXT_NAT_T_OAI,
3552 &sav->natt->oai.sa, FULLMASK, IPSEC_ULPROTO_ANY);
3556 case SADB_X_EXT_NAT_T_OAR:
3557 if (sav->natt == NULL ||
3558 (sav->natt->flags & IPSEC_NATT_F_OAR) == 0)
3560 m = key_setsadbaddr(SADB_X_EXT_NAT_T_OAR,
3561 &sav->natt->oar.sa, FULLMASK, IPSEC_ULPROTO_ANY);
3565 case SADB_X_EXT_NAT_T_FRAG:
3566 /* We do not (yet) support those. */
3569 case SADB_EXT_ADDRESS_PROXY:
3570 case SADB_EXT_IDENTITY_SRC:
3571 case SADB_EXT_IDENTITY_DST:
3572 /* XXX: should we brought from SPD ? */
3573 case SADB_EXT_SENSITIVITY:
3585 m_cat(result, tres);
3587 if (result->m_len < sizeof(struct sadb_msg)) {
3588 result = m_pullup(result, sizeof(struct sadb_msg));
3593 result->m_pkthdr.len = 0;
3594 for (m = result; m; m = m->m_next)
3595 result->m_pkthdr.len += m->m_len;
3597 mtod(result, struct sadb_msg *)->sadb_msg_len =
3598 PFKEY_UNIT64(result->m_pkthdr.len);
3609 * set data into sadb_msg.
3611 static struct mbuf *
3612 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq,
3613 pid_t pid, u_int16_t reserved)
3619 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3622 MGETHDR(m, M_NOWAIT, MT_DATA);
3623 if (m && len > MHLEN) {
3624 if (!(MCLGET(m, M_NOWAIT))) {
3631 m->m_pkthdr.len = m->m_len = len;
3634 p = mtod(m, struct sadb_msg *);
3637 p->sadb_msg_version = PF_KEY_V2;
3638 p->sadb_msg_type = type;
3639 p->sadb_msg_errno = 0;
3640 p->sadb_msg_satype = satype;
3641 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3642 p->sadb_msg_reserved = reserved;
3643 p->sadb_msg_seq = seq;
3644 p->sadb_msg_pid = (u_int32_t)pid;
3650 * copy secasvar data into sadb_address.
3652 static struct mbuf *
3653 key_setsadbsa(struct secasvar *sav)
3659 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3660 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3665 p = mtod(m, struct sadb_sa *);
3667 p->sadb_sa_len = PFKEY_UNIT64(len);
3668 p->sadb_sa_exttype = SADB_EXT_SA;
3669 p->sadb_sa_spi = sav->spi;
3670 p->sadb_sa_replay = sav->replay ?
3671 (sav->replay->wsize > UINT8_MAX ? UINT8_MAX :
3672 sav->replay->wsize): 0;
3673 p->sadb_sa_state = sav->state;
3674 p->sadb_sa_auth = sav->alg_auth;
3675 p->sadb_sa_encrypt = sav->alg_enc;
3676 p->sadb_sa_flags = sav->flags & SADB_KEY_FLAGS_MAX;
3681 * set data into sadb_address.
3683 static struct mbuf *
3684 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr,
3685 u_int8_t prefixlen, u_int16_t ul_proto)
3688 struct sadb_address *p;
3691 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3692 PFKEY_ALIGN8(saddr->sa_len);
3693 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3698 p = mtod(m, struct sadb_address *);
3701 p->sadb_address_len = PFKEY_UNIT64(len);
3702 p->sadb_address_exttype = exttype;
3703 p->sadb_address_proto = ul_proto;
3704 if (prefixlen == FULLMASK) {
3705 switch (saddr->sa_family) {
3707 prefixlen = sizeof(struct in_addr) << 3;
3710 prefixlen = sizeof(struct in6_addr) << 3;
3716 p->sadb_address_prefixlen = prefixlen;
3717 p->sadb_address_reserved = 0;
3720 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3727 * set data into sadb_x_sa2.
3729 static struct mbuf *
3730 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3733 struct sadb_x_sa2 *p;
3736 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3737 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3742 p = mtod(m, struct sadb_x_sa2 *);
3745 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3746 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3747 p->sadb_x_sa2_mode = mode;
3748 p->sadb_x_sa2_reserved1 = 0;
3749 p->sadb_x_sa2_reserved2 = 0;
3750 p->sadb_x_sa2_sequence = seq;
3751 p->sadb_x_sa2_reqid = reqid;
3757 * Set data into sadb_x_sa_replay.
3759 static struct mbuf *
3760 key_setsadbxsareplay(u_int32_t replay)
3763 struct sadb_x_sa_replay *p;
3766 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa_replay));
3767 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3772 p = mtod(m, struct sadb_x_sa_replay *);
3775 p->sadb_x_sa_replay_len = PFKEY_UNIT64(len);
3776 p->sadb_x_sa_replay_exttype = SADB_X_EXT_SA_REPLAY;
3777 p->sadb_x_sa_replay_replay = (replay << 3);
3783 * Set a type in sadb_x_nat_t_type.
3785 static struct mbuf *
3786 key_setsadbxtype(u_int16_t type)
3790 struct sadb_x_nat_t_type *p;
3792 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type));
3794 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3799 p = mtod(m, struct sadb_x_nat_t_type *);
3802 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len);
3803 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
3804 p->sadb_x_nat_t_type_type = type;
3809 * Set a port in sadb_x_nat_t_port.
3810 * In contrast to default RFC 2367 behaviour, port is in network byte order.
3812 static struct mbuf *
3813 key_setsadbxport(u_int16_t port, u_int16_t type)
3817 struct sadb_x_nat_t_port *p;
3819 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port));
3821 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3826 p = mtod(m, struct sadb_x_nat_t_port *);
3829 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len);
3830 p->sadb_x_nat_t_port_exttype = type;
3831 p->sadb_x_nat_t_port_port = port;
3837 * Get port from sockaddr. Port is in network byte order.
3840 key_portfromsaddr(struct sockaddr *sa)
3843 switch (sa->sa_family) {
3846 return ((struct sockaddr_in *)sa)->sin_port;
3850 return ((struct sockaddr_in6 *)sa)->sin6_port;
3857 * Set port in struct sockaddr. Port is in network byte order.
3860 key_porttosaddr(struct sockaddr *sa, uint16_t port)
3863 switch (sa->sa_family) {
3866 ((struct sockaddr_in *)sa)->sin_port = port;
3871 ((struct sockaddr_in6 *)sa)->sin6_port = port;
3875 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n",
3876 __func__, sa->sa_family));
3882 * set data into sadb_x_policy
3884 static struct mbuf *
3885 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id, u_int32_t priority)
3888 struct sadb_x_policy *p;
3891 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3892 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3897 p = mtod(m, struct sadb_x_policy *);
3900 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3901 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3902 p->sadb_x_policy_type = type;
3903 p->sadb_x_policy_dir = dir;
3904 p->sadb_x_policy_id = id;
3905 p->sadb_x_policy_priority = priority;
3911 /* Take a key message (sadb_key) from the socket and turn it into one
3912 * of the kernel's key structures (seckey).
3914 * IN: pointer to the src
3915 * OUT: NULL no more memory
3918 key_dup_keymsg(const struct sadb_key *src, size_t len,
3919 struct malloc_type *type)
3923 dst = malloc(sizeof(*dst), type, M_NOWAIT);
3925 dst->bits = src->sadb_key_bits;
3926 dst->key_data = malloc(len, type, M_NOWAIT);
3927 if (dst->key_data != NULL) {
3928 bcopy((const char *)(src + 1), dst->key_data, len);
3930 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3936 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3943 /* Take a lifetime message (sadb_lifetime) passed in on a socket and
3944 * turn it into one of the kernel's lifetime structures (seclifetime).
3946 * IN: pointer to the destination, source and malloc type
3947 * OUT: NULL, no more memory
3950 static struct seclifetime *
3951 key_dup_lifemsg(const struct sadb_lifetime *src, struct malloc_type *type)
3953 struct seclifetime *dst;
3955 dst = malloc(sizeof(*dst), type, M_NOWAIT);
3957 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3960 dst->allocations = src->sadb_lifetime_allocations;
3961 dst->bytes = src->sadb_lifetime_bytes;
3962 dst->addtime = src->sadb_lifetime_addtime;
3963 dst->usetime = src->sadb_lifetime_usetime;
3968 * compare two secasindex structure.
3969 * flag can specify to compare 2 saidxes.
3970 * compare two secasindex structure without both mode and reqid.
3971 * don't compare port.
3973 * saidx0: source, it can be in SAD.
3980 key_cmpsaidx(const struct secasindex *saidx0, const struct secasindex *saidx1,
3985 if (saidx0 == NULL && saidx1 == NULL)
3988 if (saidx0 == NULL || saidx1 == NULL)
3991 if (saidx0->proto != saidx1->proto)
3994 if (flag == CMP_EXACTLY) {
3995 if (saidx0->mode != saidx1->mode)
3997 if (saidx0->reqid != saidx1->reqid)
3999 if (bcmp(&saidx0->src, &saidx1->src,
4000 saidx0->src.sa.sa_len) != 0 ||
4001 bcmp(&saidx0->dst, &saidx1->dst,
4002 saidx0->dst.sa.sa_len) != 0)
4006 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
4007 if (flag == CMP_MODE_REQID || flag == CMP_REQID) {
4009 * If reqid of SPD is non-zero, unique SA is required.
4010 * The result must be of same reqid in this case.
4012 if (saidx1->reqid != 0 &&
4013 saidx0->reqid != saidx1->reqid)
4017 if (flag == CMP_MODE_REQID) {
4018 if (saidx0->mode != IPSEC_MODE_ANY
4019 && saidx0->mode != saidx1->mode)
4023 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0)
4025 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0)
4033 * compare two secindex structure exactly.
4035 * spidx0: source, it is often in SPD.
4036 * spidx1: object, it is often from PFKEY message.
4042 key_cmpspidx_exactly(struct secpolicyindex *spidx0,
4043 struct secpolicyindex *spidx1)
4046 if (spidx0 == NULL && spidx1 == NULL)
4049 if (spidx0 == NULL || spidx1 == NULL)
4052 if (spidx0->prefs != spidx1->prefs
4053 || spidx0->prefd != spidx1->prefd
4054 || spidx0->ul_proto != spidx1->ul_proto)
4057 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
4058 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
4062 * compare two secindex structure with mask.
4064 * spidx0: source, it is often in SPD.
4065 * spidx1: object, it is often from IP header.
4071 key_cmpspidx_withmask(struct secpolicyindex *spidx0,
4072 struct secpolicyindex *spidx1)
4075 if (spidx0 == NULL && spidx1 == NULL)
4078 if (spidx0 == NULL || spidx1 == NULL)
4081 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
4082 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
4083 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
4084 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
4087 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
4088 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
4089 && spidx0->ul_proto != spidx1->ul_proto)
4092 switch (spidx0->src.sa.sa_family) {
4094 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
4095 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
4097 if (!key_bbcmp(&spidx0->src.sin.sin_addr,
4098 &spidx1->src.sin.sin_addr, spidx0->prefs))
4102 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
4103 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
4106 * scope_id check. if sin6_scope_id is 0, we regard it
4107 * as a wildcard scope, which matches any scope zone ID.
4109 if (spidx0->src.sin6.sin6_scope_id &&
4110 spidx1->src.sin6.sin6_scope_id &&
4111 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
4113 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
4114 &spidx1->src.sin6.sin6_addr, spidx0->prefs))
4119 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
4124 switch (spidx0->dst.sa.sa_family) {
4126 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
4127 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
4129 if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
4130 &spidx1->dst.sin.sin_addr, spidx0->prefd))
4134 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
4135 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
4138 * scope_id check. if sin6_scope_id is 0, we regard it
4139 * as a wildcard scope, which matches any scope zone ID.
4141 if (spidx0->dst.sin6.sin6_scope_id &&
4142 spidx1->dst.sin6.sin6_scope_id &&
4143 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
4145 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
4146 &spidx1->dst.sin6.sin6_addr, spidx0->prefd))
4151 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
4156 /* XXX Do we check other field ? e.g. flowinfo */
4164 #define satosin(s) ((const struct sockaddr_in *)s)
4168 #define satosin6(s) ((const struct sockaddr_in6 *)s)
4169 /* returns 0 on match */
4171 key_sockaddrcmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
4174 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4177 switch (sa1->sa_family) {
4180 if (sa1->sa_len != sizeof(struct sockaddr_in))
4182 if (satosin(sa1)->sin_addr.s_addr !=
4183 satosin(sa2)->sin_addr.s_addr) {
4186 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4192 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4193 return 1; /*EINVAL*/
4194 if (satosin6(sa1)->sin6_scope_id !=
4195 satosin6(sa2)->sin6_scope_id) {
4198 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4199 &satosin6(sa2)->sin6_addr)) {
4203 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4209 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4217 /* returns 0 on match */
4219 key_sockaddrcmp_withmask(const struct sockaddr *sa1,
4220 const struct sockaddr *sa2, size_t mask)
4222 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4225 switch (sa1->sa_family) {
4228 return (!key_bbcmp(&satosin(sa1)->sin_addr,
4229 &satosin(sa2)->sin_addr, mask));
4233 if (satosin6(sa1)->sin6_scope_id !=
4234 satosin6(sa2)->sin6_scope_id)
4236 return (!key_bbcmp(&satosin6(sa1)->sin6_addr,
4237 &satosin6(sa2)->sin6_addr, mask));
4246 * compare two buffers with mask.
4250 * bits: Number of bits to compare
4256 key_bbcmp(const void *a1, const void *a2, u_int bits)
4258 const unsigned char *p1 = a1;
4259 const unsigned char *p2 = a2;
4261 /* XXX: This could be considerably faster if we compare a word
4262 * at a time, but it is complicated on LSB Endian machines */
4264 /* Handle null pointers */
4265 if (p1 == NULL || p2 == NULL)
4275 u_int8_t mask = ~((1<<(8-bits))-1);
4276 if ((*p1 & mask) != (*p2 & mask))
4279 return 1; /* Match! */
4283 key_flush_spd(time_t now)
4285 SPTREE_RLOCK_TRACKER;
4286 struct secpolicy_list drainq;
4287 struct secpolicy *sp, *nextsp;
4292 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4293 TAILQ_FOREACH(sp, &V_sptree[dir], chain) {
4294 if (sp->lifetime == 0 && sp->validtime == 0)
4296 if ((sp->lifetime &&
4297 now - sp->created > sp->lifetime) ||
4299 now - sp->lastused > sp->validtime)) {
4300 /* Hold extra reference to send SPDEXPIRE */
4302 LIST_INSERT_HEAD(&drainq, sp, drainq);
4307 if (LIST_EMPTY(&drainq))
4311 sp = LIST_FIRST(&drainq);
4312 while (sp != NULL) {
4313 nextsp = LIST_NEXT(sp, drainq);
4314 /* Check that SP is still linked */
4315 if (sp->state != IPSEC_SPSTATE_ALIVE) {
4316 LIST_REMOVE(sp, drainq);
4317 key_freesp(&sp); /* release extra reference */
4321 TAILQ_REMOVE(&V_sptree[sp->spidx.dir], sp, chain);
4322 LIST_REMOVE(sp, idhash);
4323 sp->state = IPSEC_SPSTATE_DEAD;
4329 sp = LIST_FIRST(&drainq);
4330 while (sp != NULL) {
4331 nextsp = LIST_NEXT(sp, drainq);
4333 key_freesp(&sp); /* release extra reference */
4334 key_freesp(&sp); /* release last reference */
4340 key_flush_sad(time_t now)
4342 SAHTREE_RLOCK_TRACKER;
4343 struct secashead_list emptyq;
4344 struct secasvar_list drainq, hexpireq, sexpireq, freeq;
4345 struct secashead *sah, *nextsah;
4346 struct secasvar *sav, *nextsav;
4349 LIST_INIT(&hexpireq);
4350 LIST_INIT(&sexpireq);
4354 TAILQ_FOREACH(sah, &V_sahtree, chain) {
4355 /* Check for empty SAH */
4356 if (TAILQ_EMPTY(&sah->savtree_larval) &&
4357 TAILQ_EMPTY(&sah->savtree_alive)) {
4359 LIST_INSERT_HEAD(&emptyq, sah, drainq);
4362 /* Add all stale LARVAL SAs into drainq */
4363 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
4364 if (now - sav->created < V_key_larval_lifetime)
4367 LIST_INSERT_HEAD(&drainq, sav, drainq);
4369 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
4370 /* lifetimes aren't specified */
4371 if (sav->lft_h == NULL)
4375 * Check again with lock held, because it may
4376 * be updated by SADB_UPDATE.
4378 if (sav->lft_h == NULL) {
4379 SECASVAR_UNLOCK(sav);
4384 * HARD lifetimes MUST take precedence over SOFT
4385 * lifetimes, meaning if the HARD and SOFT lifetimes
4386 * are the same, the HARD lifetime will appear on the
4389 /* check HARD lifetime */
4390 if ((sav->lft_h->addtime != 0 &&
4391 now - sav->created > sav->lft_h->addtime) ||
4392 (sav->lft_h->usetime != 0 && sav->firstused &&
4393 now - sav->firstused > sav->lft_h->usetime) ||
4394 (sav->lft_h->bytes != 0 && counter_u64_fetch(
4395 sav->lft_c_bytes) > sav->lft_h->bytes)) {
4396 SECASVAR_UNLOCK(sav);
4398 LIST_INSERT_HEAD(&hexpireq, sav, drainq);
4401 /* check SOFT lifetime (only for MATURE SAs) */
4402 if (sav->state == SADB_SASTATE_MATURE && (
4403 (sav->lft_s->addtime != 0 &&
4404 now - sav->created > sav->lft_s->addtime) ||
4405 (sav->lft_s->usetime != 0 && sav->firstused &&
4406 now - sav->firstused > sav->lft_s->usetime) ||
4407 (sav->lft_s->bytes != 0 && counter_u64_fetch(
4408 sav->lft_c_bytes) > sav->lft_s->bytes))) {
4409 SECASVAR_UNLOCK(sav);
4411 LIST_INSERT_HEAD(&sexpireq, sav, drainq);
4414 SECASVAR_UNLOCK(sav);
4419 if (LIST_EMPTY(&emptyq) && LIST_EMPTY(&drainq) &&
4420 LIST_EMPTY(&hexpireq) && LIST_EMPTY(&sexpireq))
4425 /* Unlink stale LARVAL SAs */
4426 sav = LIST_FIRST(&drainq);
4427 while (sav != NULL) {
4428 nextsav = LIST_NEXT(sav, drainq);
4429 /* Check that SA is still LARVAL */
4430 if (sav->state != SADB_SASTATE_LARVAL) {
4431 LIST_REMOVE(sav, drainq);
4432 LIST_INSERT_HEAD(&freeq, sav, drainq);
4436 TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain);
4437 LIST_REMOVE(sav, spihash);
4438 sav->state = SADB_SASTATE_DEAD;
4441 /* Unlink all SAs with expired HARD lifetime */
4442 sav = LIST_FIRST(&hexpireq);
4443 while (sav != NULL) {
4444 nextsav = LIST_NEXT(sav, drainq);
4445 /* Check that SA is not unlinked */
4446 if (sav->state == SADB_SASTATE_DEAD) {
4447 LIST_REMOVE(sav, drainq);
4448 LIST_INSERT_HEAD(&freeq, sav, drainq);
4452 TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain);
4453 LIST_REMOVE(sav, spihash);
4454 sav->state = SADB_SASTATE_DEAD;
4457 /* Mark all SAs with expired SOFT lifetime as DYING */
4458 sav = LIST_FIRST(&sexpireq);
4459 while (sav != NULL) {
4460 nextsav = LIST_NEXT(sav, drainq);
4461 /* Check that SA is not unlinked */
4462 if (sav->state == SADB_SASTATE_DEAD) {
4463 LIST_REMOVE(sav, drainq);
4464 LIST_INSERT_HEAD(&freeq, sav, drainq);
4469 * NOTE: this doesn't change SA order in the chain.
4471 sav->state = SADB_SASTATE_DYING;
4474 /* Unlink empty SAHs */
4475 sah = LIST_FIRST(&emptyq);
4476 while (sah != NULL) {
4477 nextsah = LIST_NEXT(sah, drainq);
4478 /* Check that SAH is still empty and not unlinked */
4479 if (sah->state == SADB_SASTATE_DEAD ||
4480 !TAILQ_EMPTY(&sah->savtree_larval) ||
4481 !TAILQ_EMPTY(&sah->savtree_alive)) {
4482 LIST_REMOVE(sah, drainq);
4483 key_freesah(&sah); /* release extra reference */
4487 TAILQ_REMOVE(&V_sahtree, sah, chain);
4488 LIST_REMOVE(sah, addrhash);
4489 sah->state = SADB_SASTATE_DEAD;
4494 /* Send SPDEXPIRE messages */
4495 sav = LIST_FIRST(&hexpireq);
4496 while (sav != NULL) {
4497 nextsav = LIST_NEXT(sav, drainq);
4499 key_freesah(&sav->sah); /* release reference from SAV */
4500 key_freesav(&sav); /* release extra reference */
4501 key_freesav(&sav); /* release last reference */
4504 sav = LIST_FIRST(&sexpireq);
4505 while (sav != NULL) {
4506 nextsav = LIST_NEXT(sav, drainq);
4508 key_freesav(&sav); /* release extra reference */
4511 /* Free stale LARVAL SAs */
4512 sav = LIST_FIRST(&drainq);
4513 while (sav != NULL) {
4514 nextsav = LIST_NEXT(sav, drainq);
4515 key_freesah(&sav->sah); /* release reference from SAV */
4516 key_freesav(&sav); /* release extra reference */
4517 key_freesav(&sav); /* release last reference */
4520 /* Free SAs that were unlinked/changed by someone else */
4521 sav = LIST_FIRST(&freeq);
4522 while (sav != NULL) {
4523 nextsav = LIST_NEXT(sav, drainq);
4524 key_freesav(&sav); /* release extra reference */
4527 /* Free empty SAH */
4528 sah = LIST_FIRST(&emptyq);
4529 while (sah != NULL) {
4530 nextsah = LIST_NEXT(sah, drainq);
4531 key_freesah(&sah); /* release extra reference */
4532 key_freesah(&sah); /* release last reference */
4538 key_flush_acq(time_t now)
4540 struct secacq *acq, *nextacq;
4544 acq = LIST_FIRST(&V_acqtree);
4545 while (acq != NULL) {
4546 nextacq = LIST_NEXT(acq, chain);
4547 if (now - acq->created > V_key_blockacq_lifetime) {
4548 LIST_REMOVE(acq, chain);
4549 LIST_REMOVE(acq, addrhash);
4550 LIST_REMOVE(acq, seqhash);
4551 free(acq, M_IPSEC_SAQ);
4559 key_flush_spacq(time_t now)
4561 struct secspacq *acq, *nextacq;
4565 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) {
4566 nextacq = LIST_NEXT(acq, chain);
4567 if (now - acq->created > V_key_blockacq_lifetime
4568 && __LIST_CHAINED(acq)) {
4569 LIST_REMOVE(acq, chain);
4570 free(acq, M_IPSEC_SAQ);
4578 * scanning SPD and SAD to check status for each entries,
4579 * and do to remove or to expire.
4580 * XXX: year 2038 problem may remain.
4583 key_timehandler(void *arg)
4585 VNET_ITERATOR_DECL(vnet_iter);
4586 time_t now = time_second;
4588 VNET_LIST_RLOCK_NOSLEEP();
4589 VNET_FOREACH(vnet_iter) {
4590 CURVNET_SET(vnet_iter);
4594 key_flush_spacq(now);
4597 VNET_LIST_RUNLOCK_NOSLEEP();
4599 #ifndef IPSEC_DEBUG2
4600 /* do exchange to tick time !! */
4601 callout_schedule(&key_timer, hz);
4602 #endif /* IPSEC_DEBUG2 */
4610 key_randomfill(&value, sizeof(value));
4615 key_randomfill(void *p, size_t l)
4619 static int warn = 1;
4622 n = (size_t)read_random(p, (u_int)l);
4626 bcopy(&v, (u_int8_t *)p + n,
4627 l - n < sizeof(v) ? l - n : sizeof(v));
4631 printf("WARNING: pseudo-random number generator "
4632 "used for IPsec processing\n");
4639 * map SADB_SATYPE_* to IPPROTO_*.
4640 * if satype == SADB_SATYPE then satype is mapped to ~0.
4642 * 0: invalid satype.
4645 key_satype2proto(uint8_t satype)
4648 case SADB_SATYPE_UNSPEC:
4649 return IPSEC_PROTO_ANY;
4650 case SADB_SATYPE_AH:
4652 case SADB_SATYPE_ESP:
4654 case SADB_X_SATYPE_IPCOMP:
4655 return IPPROTO_IPCOMP;
4656 case SADB_X_SATYPE_TCPSIGNATURE:
4665 * map IPPROTO_* to SADB_SATYPE_*
4667 * 0: invalid protocol type.
4670 key_proto2satype(uint8_t proto)
4674 return SADB_SATYPE_AH;
4676 return SADB_SATYPE_ESP;
4677 case IPPROTO_IPCOMP:
4678 return SADB_X_SATYPE_IPCOMP;
4680 return SADB_X_SATYPE_TCPSIGNATURE;
4689 * SADB_GETSPI processing is to receive
4690 * <base, (SA2), src address, dst address, (SPI range)>
4691 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4692 * tree with the status of LARVAL, and send
4693 * <base, SA(*), address(SD)>
4696 * IN: mhp: pointer to the pointer to each header.
4697 * OUT: NULL if fail.
4698 * other if success, return pointer to the message to send.
4701 key_getspi(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
4703 struct secasindex saidx;
4704 struct sadb_address *src0, *dst0;
4705 struct secasvar *sav;
4706 uint32_t reqid, spi;
4708 uint8_t mode, proto;
4710 IPSEC_ASSERT(so != NULL, ("null socket"));
4711 IPSEC_ASSERT(m != NULL, ("null mbuf"));
4712 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
4713 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
4715 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
4716 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST)
4717 #ifdef PFKEY_STRICT_CHECKS
4718 || SADB_CHECKHDR(mhp, SADB_EXT_SPIRANGE)
4721 ipseclog((LOG_DEBUG,
4722 "%s: invalid message: missing required header.\n",
4727 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
4728 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)
4729 #ifdef PFKEY_STRICT_CHECKS
4730 || SADB_CHECKLEN(mhp, SADB_EXT_SPIRANGE)
4733 ipseclog((LOG_DEBUG,
4734 "%s: invalid message: wrong header size.\n", __func__));
4738 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
4739 mode = IPSEC_MODE_ANY;
4742 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
4743 ipseclog((LOG_DEBUG,
4744 "%s: invalid message: wrong header size.\n",
4749 mode = ((struct sadb_x_sa2 *)
4750 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4751 reqid = ((struct sadb_x_sa2 *)
4752 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4755 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4756 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4758 /* map satype to proto */
4759 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4760 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
4765 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
4766 (struct sockaddr *)(dst0 + 1));
4768 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
4772 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4774 /* SPI allocation */
4775 spi = key_do_getnewspi(
4776 (struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE], &saidx);
4779 * Requested SPI or SPI range is not available or
4785 sav = key_newsav(mhp, &saidx, spi, &error);
4789 if (sav->seq != 0) {
4792 * If the SADB_GETSPI message is in response to a
4793 * kernel-generated SADB_ACQUIRE, the sadb_msg_seq
4794 * MUST be the same as the SADB_ACQUIRE message.
4796 * XXXAE: However it doesn't definethe behaviour how to
4797 * check this and what to do if it doesn't match.
4798 * Also what we should do if it matches?
4800 * We can compare saidx used in SADB_ACQUIRE with saidx
4801 * used in SADB_GETSPI, but this probably can break
4802 * existing software. For now just warn if it doesn't match.
4804 * XXXAE: anyway it looks useless.
4806 key_acqdone(&saidx, sav->seq);
4809 printf("%s: SA(%p)\n", __func__, sav));
4810 KEYDBG(KEY_DATA, kdebug_secasv(sav));
4813 struct mbuf *n, *nn;
4814 struct sadb_sa *m_sa;
4815 struct sadb_msg *newmsg;
4818 /* create new sadb_msg to reply. */
4819 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4820 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4822 MGETHDR(n, M_NOWAIT, MT_DATA);
4824 if (!(MCLGET(n, M_NOWAIT))) {
4838 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4839 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4841 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4842 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4843 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4844 m_sa->sadb_sa_spi = spi; /* SPI is already in network byte order */
4845 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4847 IPSEC_ASSERT(off == len,
4848 ("length inconsistency (off %u len %u)", off, len));
4850 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4851 SADB_EXT_ADDRESS_DST);
4858 if (n->m_len < sizeof(struct sadb_msg)) {
4859 n = m_pullup(n, sizeof(struct sadb_msg));
4861 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4864 n->m_pkthdr.len = 0;
4865 for (nn = n; nn; nn = nn->m_next)
4866 n->m_pkthdr.len += nn->m_len;
4868 newmsg = mtod(n, struct sadb_msg *);
4869 newmsg->sadb_msg_seq = sav->seq;
4870 newmsg->sadb_msg_errno = 0;
4871 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4874 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4878 return (key_senderror(so, m, error));
4882 * allocating new SPI
4883 * called by key_getspi().
4886 * others: success, SPI in network byte order.
4889 key_do_getnewspi(struct sadb_spirange *spirange, struct secasindex *saidx)
4891 uint32_t min, max, newspi, t;
4892 int count = V_key_spi_trycnt;
4894 /* set spi range to allocate */
4895 if (spirange != NULL) {
4896 min = spirange->sadb_spirange_min;
4897 max = spirange->sadb_spirange_max;
4899 min = V_key_spi_minval;
4900 max = V_key_spi_maxval;
4902 /* IPCOMP needs 2-byte SPI */
4903 if (saidx->proto == IPPROTO_IPCOMP) {
4909 t = min; min = max; max = t;
4914 if (!key_checkspidup(htonl(min))) {
4915 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n",
4920 count--; /* taking one cost. */
4927 /* when requesting to allocate spi ranged */
4929 /* generate pseudo-random SPI value ranged. */
4930 newspi = min + (key_random() % (max - min + 1));
4931 if (!key_checkspidup(htonl(newspi)))
4935 if (count == 0 || newspi == 0) {
4936 ipseclog((LOG_DEBUG,
4937 "%s: failed to allocate SPI.\n", __func__));
4943 keystat.getspi_count =
4944 (keystat.getspi_count + V_key_spi_trycnt - count) / 2;
4946 return (htonl(newspi));
4950 * Find TCP-MD5 SA with corresponding secasindex.
4951 * If not found, return NULL and fill SPI with usable value if needed.
4953 static struct secasvar *
4954 key_getsav_tcpmd5(struct secasindex *saidx, uint32_t *spi)
4956 SAHTREE_RLOCK_TRACKER;
4957 struct secashead *sah;
4958 struct secasvar *sav;
4960 IPSEC_ASSERT(saidx->proto == IPPROTO_TCP, ("wrong proto"));
4962 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
4963 if (sah->saidx.proto != IPPROTO_TCP)
4965 if (!key_sockaddrcmp(&saidx->dst.sa, &sah->saidx.dst.sa, 0))
4969 if (V_key_preferred_oldsa)
4970 sav = TAILQ_LAST(&sah->savtree_alive, secasvar_queue);
4972 sav = TAILQ_FIRST(&sah->savtree_alive);
4980 /* No SPI required */
4984 /* Check that SPI is unique */
4985 LIST_FOREACH(sav, SAVHASH_HASH(*spi), spihash) {
4986 if (sav->spi == *spi)
4991 /* SPI is already unique */
4995 /* XXX: not optimal */
4996 *spi = key_do_getnewspi(NULL, saidx);
5001 key_updateaddresses(struct socket *so, struct mbuf *m,
5002 const struct sadb_msghdr *mhp, struct secasvar *sav,
5003 struct secasindex *saidx)
5005 struct sockaddr *newaddr;
5006 struct secashead *sah;
5007 struct secasvar *newsav, *tmp;
5011 /* Check that we need to change SAH */
5012 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC)) {
5013 newaddr = (struct sockaddr *)(
5014 ((struct sadb_address *)
5015 mhp->ext[SADB_X_EXT_NEW_ADDRESS_SRC]) + 1);
5016 bcopy(newaddr, &saidx->src, newaddr->sa_len);
5017 key_porttosaddr(&saidx->src.sa, 0);
5019 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST)) {
5020 newaddr = (struct sockaddr *)(
5021 ((struct sadb_address *)
5022 mhp->ext[SADB_X_EXT_NEW_ADDRESS_DST]) + 1);
5023 bcopy(newaddr, &saidx->dst, newaddr->sa_len);
5024 key_porttosaddr(&saidx->dst.sa, 0);
5026 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC) ||
5027 !SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST)) {
5028 error = key_checksockaddrs(&saidx->src.sa, &saidx->dst.sa);
5030 ipseclog((LOG_DEBUG, "%s: invalid new sockaddr.\n",
5035 sah = key_getsah(saidx);
5037 /* create a new SA index */
5038 sah = key_newsah(saidx);
5040 ipseclog((LOG_DEBUG,
5041 "%s: No more memory.\n", __func__));
5044 isnew = 2; /* SAH is new */
5046 isnew = 1; /* existing SAH is referenced */
5049 * src and dst addresses are still the same.
5050 * Do we want to change NAT-T config?
5052 if (sav->sah->saidx.proto != IPPROTO_ESP ||
5053 SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) ||
5054 SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) ||
5055 SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) {
5056 ipseclog((LOG_DEBUG,
5057 "%s: invalid message: missing required header.\n",
5061 /* We hold reference to SA, thus SAH will be referenced too. */
5066 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA,
5068 if (newsav == NULL) {
5069 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5074 /* Clone SA's content into newsav */
5075 SAV_INITREF(newsav);
5076 bcopy(sav, newsav, offsetof(struct secasvar, chain));
5078 * We create new NAT-T config if it is needed.
5079 * Old NAT-T config will be freed by key_cleansav() when
5080 * last reference to SA will be released.
5082 newsav->natt = NULL;
5084 newsav->state = SADB_SASTATE_MATURE;
5085 error = key_setnatt(sav, mhp);
5090 /* Check that SA is still alive */
5091 if (sav->state == SADB_SASTATE_DEAD) {
5092 /* SA was unlinked */
5098 /* Unlink SA from SAH and SPI hash */
5099 IPSEC_ASSERT((sav->flags & SADB_X_EXT_F_CLONED) == 0,
5100 ("SA is already cloned"));
5101 IPSEC_ASSERT(sav->state == SADB_SASTATE_MATURE ||
5102 sav->state == SADB_SASTATE_DYING,
5103 ("Wrong SA state %u\n", sav->state));
5104 TAILQ_REMOVE(&sav->sah->savtree_alive, sav, chain);
5105 LIST_REMOVE(sav, spihash);
5106 sav->state = SADB_SASTATE_DEAD;
5109 * Link new SA with SAH. Keep SAs ordered by
5110 * create time (newer are first).
5112 TAILQ_FOREACH(tmp, &sah->savtree_alive, chain) {
5113 if (newsav->created > tmp->created) {
5114 TAILQ_INSERT_BEFORE(tmp, newsav, chain);
5119 TAILQ_INSERT_TAIL(&sah->savtree_alive, newsav, chain);
5121 /* Add new SA into SPI hash. */
5122 LIST_INSERT_HEAD(SAVHASH_HASH(newsav->spi), newsav, spihash);
5124 /* Add new SAH into SADB. */
5126 TAILQ_INSERT_HEAD(&V_sahtree, sah, chain);
5127 LIST_INSERT_HEAD(SAHADDRHASH_HASH(saidx), sah, addrhash);
5128 sah->state = SADB_SASTATE_MATURE;
5129 SAH_ADDREF(sah); /* newsav references new SAH */
5132 * isnew == 1 -> @sah was referenced by key_getsah().
5133 * isnew == 0 -> we use the same @sah, that was used by @sav,
5134 * and we use its reference for @newsav.
5137 /* XXX: replace cntr with pointer? */
5138 newsav->cntr = sav->cntr;
5139 sav->flags |= SADB_X_EXT_F_CLONED;
5140 SECASVAR_UNLOCK(sav);
5145 printf("%s: SA(%p) cloned into SA(%p)\n",
5146 __func__, sav, newsav));
5147 KEYDBG(KEY_DATA, kdebug_secasv(newsav));
5149 key_freesav(&sav); /* release last reference */
5151 /* set msg buf from mhp */
5152 n = key_getmsgbuf_x1(m, mhp);
5154 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5158 key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5163 if (newsav != NULL) {
5164 if (newsav->natt != NULL)
5165 free(newsav->natt, M_IPSEC_MISC);
5166 free(newsav, M_IPSEC_SA);
5172 * SADB_UPDATE processing
5174 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5175 * key(AE), (identity(SD),) (sensitivity)>
5176 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
5178 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5179 * (identity(SD),) (sensitivity)>
5182 * m will always be freed.
5185 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5187 struct secasindex saidx;
5188 struct sadb_address *src0, *dst0;
5189 struct sadb_sa *sa0;
5190 struct secasvar *sav;
5193 uint8_t mode, proto;
5195 IPSEC_ASSERT(so != NULL, ("null socket"));
5196 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5197 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5198 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5200 /* map satype to proto */
5201 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5202 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5204 return key_senderror(so, m, EINVAL);
5207 if (SADB_CHECKHDR(mhp, SADB_EXT_SA) ||
5208 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
5209 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
5210 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
5211 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) ||
5212 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) &&
5213 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) {
5214 ipseclog((LOG_DEBUG,
5215 "%s: invalid message: missing required header.\n",
5217 return key_senderror(so, m, EINVAL);
5219 if (SADB_CHECKLEN(mhp, SADB_EXT_SA) ||
5220 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
5221 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
5222 ipseclog((LOG_DEBUG,
5223 "%s: invalid message: wrong header size.\n", __func__));
5224 return key_senderror(so, m, EINVAL);
5226 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
5227 mode = IPSEC_MODE_ANY;
5230 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
5231 ipseclog((LOG_DEBUG,
5232 "%s: invalid message: wrong header size.\n",
5234 return key_senderror(so, m, EINVAL);
5236 mode = ((struct sadb_x_sa2 *)
5237 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5238 reqid = ((struct sadb_x_sa2 *)
5239 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5242 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5243 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5244 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5247 * Only SADB_SASTATE_MATURE SAs may be submitted in an
5248 * SADB_UPDATE message.
5250 if (sa0->sadb_sa_state != SADB_SASTATE_MATURE) {
5251 ipseclog((LOG_DEBUG, "%s: invalid state.\n", __func__));
5252 #ifdef PFKEY_STRICT_CHECKS
5253 return key_senderror(so, m, EINVAL);
5256 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
5257 (struct sockaddr *)(dst0 + 1));
5259 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
5260 return key_senderror(so, m, error);
5262 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5263 sav = key_getsavbyspi(sa0->sadb_sa_spi);
5265 ipseclog((LOG_DEBUG, "%s: no SA found for SPI %u\n",
5266 __func__, ntohl(sa0->sadb_sa_spi)));
5267 return key_senderror(so, m, EINVAL);
5270 * Check that SADB_UPDATE issued by the same process that did
5271 * SADB_GETSPI or SADB_ADD.
5273 if (sav->pid != mhp->msg->sadb_msg_pid) {
5274 ipseclog((LOG_DEBUG,
5275 "%s: pid mismatched (SPI %u, pid %u vs. %u)\n", __func__,
5276 ntohl(sav->spi), sav->pid, mhp->msg->sadb_msg_pid));
5278 return key_senderror(so, m, EINVAL);
5280 /* saidx should match with SA. */
5281 if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_MODE_REQID) == 0) {
5282 ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u",
5283 __func__, ntohl(sav->spi)));
5285 return key_senderror(so, m, ESRCH);
5288 if (sav->state == SADB_SASTATE_LARVAL) {
5289 if ((mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
5290 SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT)) ||
5291 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
5292 SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH))) {
5293 ipseclog((LOG_DEBUG,
5294 "%s: invalid message: missing required header.\n",
5297 return key_senderror(so, m, EINVAL);
5300 * We can set any values except src, dst and SPI.
5302 error = key_setsaval(sav, mhp);
5305 return (key_senderror(so, m, error));
5307 /* Change SA state to MATURE */
5309 if (sav->state != SADB_SASTATE_LARVAL) {
5310 /* SA was deleted or another thread made it MATURE. */
5313 return (key_senderror(so, m, ESRCH));
5316 * NOTE: we keep SAs in savtree_alive ordered by created
5317 * time. When SA's state changed from LARVAL to MATURE,
5318 * we update its created time in key_setsaval() and move
5319 * it into head of savtree_alive.
5321 TAILQ_REMOVE(&sav->sah->savtree_larval, sav, chain);
5322 TAILQ_INSERT_HEAD(&sav->sah->savtree_alive, sav, chain);
5323 sav->state = SADB_SASTATE_MATURE;
5327 * For DYING and MATURE SA we can change only state
5328 * and lifetimes. Report EINVAL if something else attempted
5331 if (!SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT) ||
5332 !SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH)) {
5334 return (key_senderror(so, m, EINVAL));
5336 error = key_updatelifetimes(sav, mhp);
5339 return (key_senderror(so, m, error));
5342 * This is FreeBSD extension to RFC2367.
5343 * IKEd can specify SADB_X_EXT_NEW_ADDRESS_SRC and/or
5344 * SADB_X_EXT_NEW_ADDRESS_DST when it wants to change
5345 * SA addresses (for example to implement MOBIKE protocol
5346 * as described in RFC4555). Also we allow to change
5349 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_SRC) ||
5350 !SADB_CHECKHDR(mhp, SADB_X_EXT_NEW_ADDRESS_DST) ||
5351 !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) ||
5352 sav->natt != NULL) {
5353 error = key_updateaddresses(so, m, mhp, sav, &saidx);
5356 return (key_senderror(so, m, error));
5359 /* Check that SA is still alive */
5361 if (sav->state == SADB_SASTATE_DEAD) {
5362 /* SA was unlinked */
5365 return (key_senderror(so, m, ESRCH));
5368 * NOTE: there is possible state moving from DYING to MATURE,
5369 * but this doesn't change created time, so we won't reorder
5372 sav->state = SADB_SASTATE_MATURE;
5376 printf("%s: SA(%p)\n", __func__, sav));
5377 KEYDBG(KEY_DATA, kdebug_secasv(sav));
5383 /* set msg buf from mhp */
5384 n = key_getmsgbuf_x1(m, mhp);
5386 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5387 return key_senderror(so, m, ENOBUFS);
5391 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5396 * SADB_ADD processing
5397 * add an entry to SA database, when received
5398 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5399 * key(AE), (identity(SD),) (sensitivity)>
5402 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5403 * (identity(SD),) (sensitivity)>
5406 * IGNORE identity and sensitivity messages.
5408 * m will always be freed.
5411 key_add(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5413 struct secasindex saidx;
5414 struct sadb_address *src0, *dst0;
5415 struct sadb_sa *sa0;
5416 struct secasvar *sav;
5417 uint32_t reqid, spi;
5418 uint8_t mode, proto;
5421 IPSEC_ASSERT(so != NULL, ("null socket"));
5422 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5423 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5424 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5426 /* map satype to proto */
5427 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5428 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5430 return key_senderror(so, m, EINVAL);
5433 if (SADB_CHECKHDR(mhp, SADB_EXT_SA) ||
5434 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
5435 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
5436 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP && (
5437 SADB_CHECKHDR(mhp, SADB_EXT_KEY_ENCRYPT) ||
5438 SADB_CHECKLEN(mhp, SADB_EXT_KEY_ENCRYPT))) ||
5439 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH && (
5440 SADB_CHECKHDR(mhp, SADB_EXT_KEY_AUTH) ||
5441 SADB_CHECKLEN(mhp, SADB_EXT_KEY_AUTH))) ||
5442 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD) &&
5443 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT)) ||
5444 (SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_SOFT) &&
5445 !SADB_CHECKHDR(mhp, SADB_EXT_LIFETIME_HARD))) {
5446 ipseclog((LOG_DEBUG,
5447 "%s: invalid message: missing required header.\n",
5449 return key_senderror(so, m, EINVAL);
5451 if (SADB_CHECKLEN(mhp, SADB_EXT_SA) ||
5452 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
5453 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
5454 ipseclog((LOG_DEBUG,
5455 "%s: invalid message: wrong header size.\n", __func__));
5456 return key_senderror(so, m, EINVAL);
5458 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
5459 mode = IPSEC_MODE_ANY;
5462 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
5463 ipseclog((LOG_DEBUG,
5464 "%s: invalid message: wrong header size.\n",
5466 return key_senderror(so, m, EINVAL);
5468 mode = ((struct sadb_x_sa2 *)
5469 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5470 reqid = ((struct sadb_x_sa2 *)
5471 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5474 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5475 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5476 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5479 * Only SADB_SASTATE_MATURE SAs may be submitted in an
5482 if (sa0->sadb_sa_state != SADB_SASTATE_MATURE) {
5483 ipseclog((LOG_DEBUG, "%s: invalid state.\n", __func__));
5484 #ifdef PFKEY_STRICT_CHECKS
5485 return key_senderror(so, m, EINVAL);
5488 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
5489 (struct sockaddr *)(dst0 + 1));
5491 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
5492 return key_senderror(so, m, error);
5494 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5495 spi = sa0->sadb_sa_spi;
5497 * For TCP-MD5 SAs we don't use SPI. Check the uniqueness using
5499 * XXXAE: IPComp seems also doesn't use SPI.
5501 if (proto == IPPROTO_TCP) {
5502 sav = key_getsav_tcpmd5(&saidx, &spi);
5503 if (sav == NULL && spi == 0) {
5504 /* Failed to allocate SPI */
5505 ipseclog((LOG_DEBUG, "%s: SA already exists.\n",
5507 return key_senderror(so, m, EEXIST);
5509 /* XXX: SPI that we report back can have another value */
5511 /* We can create new SA only if SPI is different. */
5512 sav = key_getsavbyspi(spi);
5516 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__));
5517 return key_senderror(so, m, EEXIST);
5520 sav = key_newsav(mhp, &saidx, spi, &error);
5522 return key_senderror(so, m, error);
5524 printf("%s: return SA(%p)\n", __func__, sav));
5525 KEYDBG(KEY_DATA, kdebug_secasv(sav));
5527 * If SADB_ADD was in response to SADB_ACQUIRE, we need to schedule
5531 key_acqdone(&saidx, sav->seq);
5535 * Don't call key_freesav() on error here, as we would like to
5536 * keep the SA in the database.
5540 /* set msg buf from mhp */
5541 n = key_getmsgbuf_x1(m, mhp);
5543 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5544 return key_senderror(so, m, ENOBUFS);
5548 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5554 * IKEd may request the use ESP in UDP encapsulation when it detects the
5555 * presence of NAT. It uses NAT-T extension headers for such SAs to specify
5556 * parameters needed for encapsulation and decapsulation. These PF_KEY
5557 * extension headers are not standardized, so this comment addresses our
5559 * SADB_X_EXT_NAT_T_TYPE specifies type of encapsulation, we support only
5560 * UDP_ENCAP_ESPINUDP as described in RFC3948.
5561 * SADB_X_EXT_NAT_T_SPORT/DPORT specifies source and destination ports for
5562 * UDP header. We use these ports in UDP encapsulation procedure, also we
5563 * can check them in UDP decapsulation procedure.
5564 * SADB_X_EXT_NAT_T_OA[IR] specifies original address of initiator or
5565 * responder. These addresses can be used for transport mode to adjust
5566 * checksum after decapsulation and decryption. Since original IP addresses
5567 * used by peer usually different (we detected presence of NAT), TCP/UDP
5568 * pseudo header checksum and IP header checksum was calculated using original
5569 * addresses. After decapsulation and decryption we need to adjust checksum
5570 * to have correct datagram.
5572 * We expect presence of NAT-T extension headers only in SADB_ADD and
5573 * SADB_UPDATE messages. We report NAT-T extension headers in replies
5574 * to SADB_ADD, SADB_UPDATE, SADB_GET, and SADB_DUMP messages.
5577 key_setnatt(struct secasvar *sav, const struct sadb_msghdr *mhp)
5579 struct sadb_x_nat_t_port *port;
5580 struct sadb_x_nat_t_type *type;
5581 struct sadb_address *oai, *oar;
5582 struct sockaddr *sa;
5586 IPSEC_ASSERT(sav->natt == NULL, ("natt is already initialized"));
5588 * Ignore NAT-T headers if sproto isn't ESP.
5590 if (sav->sah->saidx.proto != IPPROTO_ESP)
5593 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_TYPE) &&
5594 !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_SPORT) &&
5595 !SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_DPORT)) {
5596 if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_TYPE) ||
5597 SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_SPORT) ||
5598 SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_DPORT)) {
5599 ipseclog((LOG_DEBUG,
5600 "%s: invalid message: wrong header size.\n",
5607 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE];
5608 if (type->sadb_x_nat_t_type_type != UDP_ENCAP_ESPINUDP) {
5609 ipseclog((LOG_DEBUG, "%s: unsupported NAT-T type %u.\n",
5610 __func__, type->sadb_x_nat_t_type_type));
5614 * Allocate storage for NAT-T config.
5615 * On error it will be released by key_cleansav().
5617 sav->natt = malloc(sizeof(struct secnatt), M_IPSEC_MISC,
5619 if (sav->natt == NULL) {
5620 PFKEYSTAT_INC(in_nomem);
5621 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5624 port = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5625 if (port->sadb_x_nat_t_port_port == 0) {
5626 ipseclog((LOG_DEBUG, "%s: invalid NAT-T sport specified.\n",
5630 sav->natt->sport = port->sadb_x_nat_t_port_port;
5631 port = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5632 if (port->sadb_x_nat_t_port_port == 0) {
5633 ipseclog((LOG_DEBUG, "%s: invalid NAT-T dport specified.\n",
5637 sav->natt->dport = port->sadb_x_nat_t_port_port;
5640 * SADB_X_EXT_NAT_T_OAI and SADB_X_EXT_NAT_T_OAR are optional
5641 * and needed only for transport mode IPsec.
5642 * Usually NAT translates only one address, but it is possible,
5643 * that both addresses could be translated.
5644 * NOTE: Value of SADB_X_EXT_NAT_T_OAI is equal to SADB_X_EXT_NAT_T_OA.
5646 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAI)) {
5647 if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAI)) {
5648 ipseclog((LOG_DEBUG,
5649 "%s: invalid message: wrong header size.\n",
5653 oai = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI];
5656 if (!SADB_CHECKHDR(mhp, SADB_X_EXT_NAT_T_OAR)) {
5657 if (SADB_CHECKLEN(mhp, SADB_X_EXT_NAT_T_OAR)) {
5658 ipseclog((LOG_DEBUG,
5659 "%s: invalid message: wrong header size.\n",
5663 oar = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR];
5667 /* Initialize addresses only for transport mode */
5668 if (sav->sah->saidx.mode != IPSEC_MODE_TUNNEL) {
5671 /* Currently we support only AF_INET */
5672 sa = (struct sockaddr *)(oai + 1);
5673 if (sa->sa_family != AF_INET ||
5674 sa->sa_len != sizeof(struct sockaddr_in)) {
5675 ipseclog((LOG_DEBUG,
5676 "%s: wrong NAT-OAi header.\n",
5680 /* Ignore address if it the same */
5681 if (((struct sockaddr_in *)sa)->sin_addr.s_addr !=
5682 sav->sah->saidx.src.sin.sin_addr.s_addr) {
5683 bcopy(sa, &sav->natt->oai.sa, sa->sa_len);
5684 sav->natt->flags |= IPSEC_NATT_F_OAI;
5685 /* Calculate checksum delta */
5686 addr = sav->sah->saidx.src.sin.sin_addr.s_addr;
5687 cksum = in_addword(cksum, ~addr >> 16);
5688 cksum = in_addword(cksum, ~addr & 0xffff);
5689 addr = sav->natt->oai.sin.sin_addr.s_addr;
5690 cksum = in_addword(cksum, addr >> 16);
5691 cksum = in_addword(cksum, addr & 0xffff);
5695 /* Currently we support only AF_INET */
5696 sa = (struct sockaddr *)(oar + 1);
5697 if (sa->sa_family != AF_INET ||
5698 sa->sa_len != sizeof(struct sockaddr_in)) {
5699 ipseclog((LOG_DEBUG,
5700 "%s: wrong NAT-OAr header.\n",
5704 /* Ignore address if it the same */
5705 if (((struct sockaddr_in *)sa)->sin_addr.s_addr !=
5706 sav->sah->saidx.dst.sin.sin_addr.s_addr) {
5707 bcopy(sa, &sav->natt->oar.sa, sa->sa_len);
5708 sav->natt->flags |= IPSEC_NATT_F_OAR;
5709 /* Calculate checksum delta */
5710 addr = sav->sah->saidx.dst.sin.sin_addr.s_addr;
5711 cksum = in_addword(cksum, ~addr >> 16);
5712 cksum = in_addword(cksum, ~addr & 0xffff);
5713 addr = sav->natt->oar.sin.sin_addr.s_addr;
5714 cksum = in_addword(cksum, addr >> 16);
5715 cksum = in_addword(cksum, addr & 0xffff);
5718 sav->natt->cksum = cksum;
5724 key_setident(struct secashead *sah, const struct sadb_msghdr *mhp)
5726 const struct sadb_ident *idsrc, *iddst;
5727 int idsrclen, iddstlen;
5729 IPSEC_ASSERT(sah != NULL, ("null secashead"));
5730 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5731 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5733 /* don't make buffer if not there */
5734 if (SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_SRC) &&
5735 SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_DST)) {
5741 if (SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_SRC) ||
5742 SADB_CHECKHDR(mhp, SADB_EXT_IDENTITY_DST)) {
5743 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__));
5747 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5748 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5749 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5750 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5752 /* validity check */
5753 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5754 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__));
5758 switch (idsrc->sadb_ident_type) {
5759 case SADB_IDENTTYPE_PREFIX:
5760 case SADB_IDENTTYPE_FQDN:
5761 case SADB_IDENTTYPE_USERFQDN:
5763 /* XXX do nothing */
5769 /* make structure */
5770 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
5771 if (sah->idents == NULL) {
5772 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5775 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
5776 if (sah->identd == NULL) {
5777 free(sah->idents, M_IPSEC_MISC);
5779 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5782 sah->idents->type = idsrc->sadb_ident_type;
5783 sah->idents->id = idsrc->sadb_ident_id;
5785 sah->identd->type = iddst->sadb_ident_type;
5786 sah->identd->id = iddst->sadb_ident_id;
5792 * m will not be freed on return.
5793 * it is caller's responsibility to free the result.
5795 * Called from SADB_ADD and SADB_UPDATE. Reply will contain headers
5796 * from the request in defined order.
5798 static struct mbuf *
5799 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5803 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5804 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5805 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5807 /* create new sadb_msg to reply. */
5808 n = key_gather_mbuf(m, mhp, 1, 16, SADB_EXT_RESERVED,
5809 SADB_EXT_SA, SADB_X_EXT_SA2,
5810 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5811 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5812 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST,
5813 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT,
5814 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OAI,
5815 SADB_X_EXT_NAT_T_OAR, SADB_X_EXT_NEW_ADDRESS_SRC,
5816 SADB_X_EXT_NEW_ADDRESS_DST);
5820 if (n->m_len < sizeof(struct sadb_msg)) {
5821 n = m_pullup(n, sizeof(struct sadb_msg));
5825 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5826 mtod(n, struct sadb_msg *)->sadb_msg_len =
5827 PFKEY_UNIT64(n->m_pkthdr.len);
5833 * SADB_DELETE processing
5835 * <base, SA(*), address(SD)>
5836 * from the ikmpd, and set SADB_SASTATE_DEAD,
5838 * <base, SA(*), address(SD)>
5841 * m will always be freed.
5844 key_delete(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5846 struct secasindex saidx;
5847 struct sadb_address *src0, *dst0;
5848 struct secasvar *sav;
5849 struct sadb_sa *sa0;
5852 IPSEC_ASSERT(so != NULL, ("null socket"));
5853 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5854 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5855 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5857 /* map satype to proto */
5858 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5859 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5861 return key_senderror(so, m, EINVAL);
5864 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
5865 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
5866 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
5867 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
5868 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5870 return key_senderror(so, m, EINVAL);
5873 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5874 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5876 if (key_checksockaddrs((struct sockaddr *)(src0 + 1),
5877 (struct sockaddr *)(dst0 + 1)) != 0) {
5878 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
5879 return (key_senderror(so, m, EINVAL));
5881 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5882 if (SADB_CHECKHDR(mhp, SADB_EXT_SA)) {
5884 * Caller wants us to delete all non-LARVAL SAs
5885 * that match the src/dst. This is used during
5886 * IKE INITIAL-CONTACT.
5887 * XXXAE: this looks like some extension to RFC2367.
5889 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__));
5890 return (key_delete_all(so, m, mhp, &saidx));
5892 if (SADB_CHECKLEN(mhp, SADB_EXT_SA)) {
5893 ipseclog((LOG_DEBUG,
5894 "%s: invalid message: wrong header size.\n", __func__));
5895 return (key_senderror(so, m, EINVAL));
5897 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5898 if (proto == IPPROTO_TCP)
5899 sav = key_getsav_tcpmd5(&saidx, NULL);
5901 sav = key_getsavbyspi(sa0->sadb_sa_spi);
5903 ipseclog((LOG_DEBUG, "%s: no SA found for SPI %u.\n",
5904 __func__, ntohl(sa0->sadb_sa_spi)));
5905 return (key_senderror(so, m, ESRCH));
5907 if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_HEAD) == 0) {
5908 ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u.\n",
5909 __func__, ntohl(sav->spi)));
5911 return (key_senderror(so, m, ESRCH));
5914 printf("%s: SA(%p)\n", __func__, sav));
5915 KEYDBG(KEY_DATA, kdebug_secasv(sav));
5921 struct sadb_msg *newmsg;
5923 /* create new sadb_msg to reply. */
5924 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5925 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5927 return key_senderror(so, m, ENOBUFS);
5929 if (n->m_len < sizeof(struct sadb_msg)) {
5930 n = m_pullup(n, sizeof(struct sadb_msg));
5932 return key_senderror(so, m, ENOBUFS);
5934 newmsg = mtod(n, struct sadb_msg *);
5935 newmsg->sadb_msg_errno = 0;
5936 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5939 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5944 * delete all SAs for src/dst. Called from key_delete().
5947 key_delete_all(struct socket *so, struct mbuf *m,
5948 const struct sadb_msghdr *mhp, struct secasindex *saidx)
5950 struct secasvar_queue drainq;
5951 struct secashead *sah;
5952 struct secasvar *sav, *nextsav;
5954 TAILQ_INIT(&drainq);
5956 LIST_FOREACH(sah, SAHADDRHASH_HASH(saidx), addrhash) {
5957 if (key_cmpsaidx(&sah->saidx, saidx, CMP_HEAD) == 0)
5959 /* Move all ALIVE SAs into drainq */
5960 TAILQ_CONCAT(&drainq, &sah->savtree_alive, chain);
5962 /* Unlink all queued SAs from SPI hash */
5963 TAILQ_FOREACH(sav, &drainq, chain) {
5964 sav->state = SADB_SASTATE_DEAD;
5965 LIST_REMOVE(sav, spihash);
5968 /* Now we can release reference for all SAs in drainq */
5969 sav = TAILQ_FIRST(&drainq);
5970 while (sav != NULL) {
5972 printf("%s: SA(%p)\n", __func__, sav));
5973 KEYDBG(KEY_DATA, kdebug_secasv(sav));
5974 nextsav = TAILQ_NEXT(sav, chain);
5975 key_freesah(&sav->sah); /* release reference from SAV */
5976 key_freesav(&sav); /* release last reference */
5982 struct sadb_msg *newmsg;
5984 /* create new sadb_msg to reply. */
5985 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5986 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5988 return key_senderror(so, m, ENOBUFS);
5990 if (n->m_len < sizeof(struct sadb_msg)) {
5991 n = m_pullup(n, sizeof(struct sadb_msg));
5993 return key_senderror(so, m, ENOBUFS);
5995 newmsg = mtod(n, struct sadb_msg *);
5996 newmsg->sadb_msg_errno = 0;
5997 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
6000 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
6005 * Delete all alive SAs for corresponding xform.
6006 * Larval SAs have not initialized tdb_xform, so it is safe to leave them
6007 * here when xform disappears.
6010 key_delete_xform(const struct xformsw *xsp)
6012 struct secasvar_queue drainq;
6013 struct secashead *sah;
6014 struct secasvar *sav, *nextsav;
6016 TAILQ_INIT(&drainq);
6018 TAILQ_FOREACH(sah, &V_sahtree, chain) {
6019 sav = TAILQ_FIRST(&sah->savtree_alive);
6022 if (sav->tdb_xform != xsp)
6025 * It is supposed that all SAs in the chain are related to
6028 TAILQ_CONCAT(&drainq, &sah->savtree_alive, chain);
6030 /* Unlink all queued SAs from SPI hash */
6031 TAILQ_FOREACH(sav, &drainq, chain) {
6032 sav->state = SADB_SASTATE_DEAD;
6033 LIST_REMOVE(sav, spihash);
6037 /* Now we can release reference for all SAs in drainq */
6038 sav = TAILQ_FIRST(&drainq);
6039 while (sav != NULL) {
6041 printf("%s: SA(%p)\n", __func__, sav));
6042 KEYDBG(KEY_DATA, kdebug_secasv(sav));
6043 nextsav = TAILQ_NEXT(sav, chain);
6044 key_freesah(&sav->sah); /* release reference from SAV */
6045 key_freesav(&sav); /* release last reference */
6051 * SADB_GET processing
6053 * <base, SA(*), address(SD)>
6054 * from the ikmpd, and get a SP and a SA to respond,
6056 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
6057 * (identity(SD),) (sensitivity)>
6060 * m will always be freed.
6063 key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
6065 struct secasindex saidx;
6066 struct sadb_address *src0, *dst0;
6067 struct sadb_sa *sa0;
6068 struct secasvar *sav;
6071 IPSEC_ASSERT(so != NULL, ("null socket"));
6072 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6073 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6074 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6076 /* map satype to proto */
6077 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6078 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
6080 return key_senderror(so, m, EINVAL);
6083 if (SADB_CHECKHDR(mhp, SADB_EXT_SA) ||
6084 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
6085 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST)) {
6086 ipseclog((LOG_DEBUG,
6087 "%s: invalid message: missing required header.\n",
6089 return key_senderror(so, m, EINVAL);
6091 if (SADB_CHECKLEN(mhp, SADB_EXT_SA) ||
6092 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
6093 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST)) {
6094 ipseclog((LOG_DEBUG,
6095 "%s: invalid message: wrong header size.\n", __func__));
6096 return key_senderror(so, m, EINVAL);
6099 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
6100 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6101 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6103 if (key_checksockaddrs((struct sockaddr *)(src0 + 1),
6104 (struct sockaddr *)(dst0 + 1)) != 0) {
6105 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
6106 return key_senderror(so, m, EINVAL);
6108 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6110 if (proto == IPPROTO_TCP)
6111 sav = key_getsav_tcpmd5(&saidx, NULL);
6113 sav = key_getsavbyspi(sa0->sadb_sa_spi);
6115 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__));
6116 return key_senderror(so, m, ESRCH);
6118 if (key_cmpsaidx(&sav->sah->saidx, &saidx, CMP_HEAD) == 0) {
6119 ipseclog((LOG_DEBUG, "%s: saidx mismatched for SPI %u.\n",
6120 __func__, ntohl(sa0->sadb_sa_spi)));
6122 return (key_senderror(so, m, ESRCH));
6129 /* map proto to satype */
6130 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0) {
6131 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n",
6134 return key_senderror(so, m, EINVAL);
6137 /* create new sadb_msg to reply. */
6138 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
6139 mhp->msg->sadb_msg_pid);
6143 return key_senderror(so, m, ENOBUFS);
6146 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6150 /* XXX make it sysctl-configurable? */
6152 key_getcomb_setlifetime(struct sadb_comb *comb)
6155 comb->sadb_comb_soft_allocations = 1;
6156 comb->sadb_comb_hard_allocations = 1;
6157 comb->sadb_comb_soft_bytes = 0;
6158 comb->sadb_comb_hard_bytes = 0;
6159 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
6160 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
6161 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
6162 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
6166 * XXX reorder combinations by preference
6167 * XXX no idea if the user wants ESP authentication or not
6169 static struct mbuf *
6170 key_getcomb_ealg(void)
6172 struct sadb_comb *comb;
6173 const struct enc_xform *algo;
6174 struct mbuf *result = NULL, *m, *n;
6178 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6181 for (i = 1; i <= SADB_EALG_MAX; i++) {
6182 algo = enc_algorithm_lookup(i);
6186 /* discard algorithms with key size smaller than system min */
6187 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin)
6189 if (_BITS(algo->minkey) < V_ipsec_esp_keymin)
6190 encmin = V_ipsec_esp_keymin;
6192 encmin = _BITS(algo->minkey);
6194 if (V_ipsec_esp_auth)
6195 m = key_getcomb_ah();
6197 IPSEC_ASSERT(l <= MLEN,
6198 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6199 MGET(m, M_NOWAIT, MT_DATA);
6204 bzero(mtod(m, caddr_t), m->m_len);
6211 for (n = m; n; n = n->m_next)
6213 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l));
6215 for (off = 0; off < totlen; off += l) {
6216 n = m_pulldown(m, off, l, &o);
6218 /* m is already freed */
6221 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
6222 bzero(comb, sizeof(*comb));
6223 key_getcomb_setlifetime(comb);
6224 comb->sadb_comb_encrypt = i;
6225 comb->sadb_comb_encrypt_minbits = encmin;
6226 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey);
6244 key_getsizes_ah(const struct auth_hash *ah, int alg, u_int16_t* min,
6248 *min = *max = ah->keysize;
6249 if (ah->keysize == 0) {
6251 * Transform takes arbitrary key size but algorithm
6252 * key size is restricted. Enforce this here.
6255 case SADB_X_AALG_MD5: *min = *max = 16; break;
6256 case SADB_X_AALG_SHA: *min = *max = 20; break;
6257 case SADB_X_AALG_NULL: *min = 1; *max = 256; break;
6258 case SADB_X_AALG_SHA2_256: *min = *max = 32; break;
6259 case SADB_X_AALG_SHA2_384: *min = *max = 48; break;
6260 case SADB_X_AALG_SHA2_512: *min = *max = 64; break;
6262 DPRINTF(("%s: unknown AH algorithm %u\n",
6270 * XXX reorder combinations by preference
6272 static struct mbuf *
6275 const struct auth_hash *algo;
6276 struct sadb_comb *comb;
6278 u_int16_t minkeysize, maxkeysize;
6280 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6283 for (i = 1; i <= SADB_AALG_MAX; i++) {
6285 /* we prefer HMAC algorithms, not old algorithms */
6286 if (i != SADB_AALG_SHA1HMAC &&
6287 i != SADB_AALG_MD5HMAC &&
6288 i != SADB_X_AALG_SHA2_256 &&
6289 i != SADB_X_AALG_SHA2_384 &&
6290 i != SADB_X_AALG_SHA2_512)
6293 algo = auth_algorithm_lookup(i);
6296 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize);
6297 /* discard algorithms with key size smaller than system min */
6298 if (_BITS(minkeysize) < V_ipsec_ah_keymin)
6302 IPSEC_ASSERT(l <= MLEN,
6303 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6304 MGET(m, M_NOWAIT, MT_DATA);
6311 M_PREPEND(m, l, M_NOWAIT);
6315 comb = mtod(m, struct sadb_comb *);
6316 bzero(comb, sizeof(*comb));
6317 key_getcomb_setlifetime(comb);
6318 comb->sadb_comb_auth = i;
6319 comb->sadb_comb_auth_minbits = _BITS(minkeysize);
6320 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize);
6327 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
6328 * XXX reorder combinations by preference
6330 static struct mbuf *
6331 key_getcomb_ipcomp()
6333 const struct comp_algo *algo;
6334 struct sadb_comb *comb;
6337 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6340 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
6341 algo = comp_algorithm_lookup(i);
6346 IPSEC_ASSERT(l <= MLEN,
6347 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6348 MGET(m, M_NOWAIT, MT_DATA);
6355 M_PREPEND(m, l, M_NOWAIT);
6359 comb = mtod(m, struct sadb_comb *);
6360 bzero(comb, sizeof(*comb));
6361 key_getcomb_setlifetime(comb);
6362 comb->sadb_comb_encrypt = i;
6363 /* what should we set into sadb_comb_*_{min,max}bits? */
6370 * XXX no way to pass mode (transport/tunnel) to userland
6371 * XXX replay checking?
6372 * XXX sysctl interface to ipsec_{ah,esp}_keymin
6374 static struct mbuf *
6375 key_getprop(const struct secasindex *saidx)
6377 struct sadb_prop *prop;
6379 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
6382 switch (saidx->proto) {
6384 m = key_getcomb_ealg();
6387 m = key_getcomb_ah();
6389 case IPPROTO_IPCOMP:
6390 m = key_getcomb_ipcomp();
6398 M_PREPEND(m, l, M_NOWAIT);
6403 for (n = m; n; n = n->m_next)
6406 prop = mtod(m, struct sadb_prop *);
6407 bzero(prop, sizeof(*prop));
6408 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
6409 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
6410 prop->sadb_prop_replay = 32; /* XXX */
6416 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
6418 * <base, SA, address(SD), (address(P)), x_policy,
6419 * (identity(SD),) (sensitivity,) proposal>
6420 * to KMD, and expect to receive
6421 * <base> with SADB_ACQUIRE if error occurred,
6423 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
6424 * from KMD by PF_KEY.
6426 * XXX x_policy is outside of RFC2367 (KAME extension).
6427 * XXX sensitivity is not supported.
6428 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
6429 * see comment for key_getcomb_ipcomp().
6433 * others: error number
6436 key_acquire(const struct secasindex *saidx, struct secpolicy *sp)
6438 union sockaddr_union addr;
6439 struct mbuf *result, *m;
6443 uint8_t mask, satype;
6445 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
6446 satype = key_proto2satype(saidx->proto);
6447 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto));
6451 ul_proto = IPSEC_ULPROTO_ANY;
6453 /* Get seq number to check whether sending message or not. */
6454 seq = key_getacq(saidx, &error);
6458 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
6466 * set sadb_address for saidx's.
6468 * Note that if sp is supplied, then we're being called from
6469 * key_allocsa_policy() and should supply port and protocol
6471 * XXXAE: why only TCP and UDP? ICMP and SCTP looks applicable too.
6472 * XXXAE: probably we can handle this in the ipsec[46]_allocsa().
6473 * XXXAE: it looks like we should save this info in the ACQ entry.
6475 if (sp != NULL && (sp->spidx.ul_proto == IPPROTO_TCP ||
6476 sp->spidx.ul_proto == IPPROTO_UDP))
6477 ul_proto = sp->spidx.ul_proto;
6481 if (ul_proto != IPSEC_ULPROTO_ANY) {
6482 switch (sp->spidx.src.sa.sa_family) {
6484 if (sp->spidx.src.sin.sin_port != IPSEC_PORT_ANY) {
6485 addr.sin.sin_port = sp->spidx.src.sin.sin_port;
6486 mask = sp->spidx.prefs;
6490 if (sp->spidx.src.sin6.sin6_port != IPSEC_PORT_ANY) {
6491 addr.sin6.sin6_port =
6492 sp->spidx.src.sin6.sin6_port;
6493 mask = sp->spidx.prefs;
6500 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC, &addr.sa, mask, ul_proto);
6509 if (ul_proto != IPSEC_ULPROTO_ANY) {
6510 switch (sp->spidx.dst.sa.sa_family) {
6512 if (sp->spidx.dst.sin.sin_port != IPSEC_PORT_ANY) {
6513 addr.sin.sin_port = sp->spidx.dst.sin.sin_port;
6514 mask = sp->spidx.prefd;
6518 if (sp->spidx.dst.sin6.sin6_port != IPSEC_PORT_ANY) {
6519 addr.sin6.sin6_port =
6520 sp->spidx.dst.sin6.sin6_port;
6521 mask = sp->spidx.prefd;
6528 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST, &addr.sa, mask, ul_proto);
6535 /* XXX proxy address (optional) */
6537 /* set sadb_x_policy */
6539 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id,
6548 /* XXX identity (optional) */
6550 if (idexttype && fqdn) {
6551 /* create identity extension (FQDN) */
6552 struct sadb_ident *id;
6555 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
6556 id = (struct sadb_ident *)p;
6557 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6558 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6559 id->sadb_ident_exttype = idexttype;
6560 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
6561 bcopy(fqdn, id + 1, fqdnlen);
6562 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
6566 /* create identity extension (USERFQDN) */
6567 struct sadb_ident *id;
6571 /* +1 for terminating-NUL */
6572 userfqdnlen = strlen(userfqdn) + 1;
6575 id = (struct sadb_ident *)p;
6576 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6577 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6578 id->sadb_ident_exttype = idexttype;
6579 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
6580 /* XXX is it correct? */
6581 if (curproc && curproc->p_cred)
6582 id->sadb_ident_id = curproc->p_cred->p_ruid;
6583 if (userfqdn && userfqdnlen)
6584 bcopy(userfqdn, id + 1, userfqdnlen);
6585 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
6589 /* XXX sensitivity (optional) */
6591 /* create proposal/combination extension */
6592 m = key_getprop(saidx);
6595 * spec conformant: always attach proposal/combination extension,
6596 * the problem is that we have no way to attach it for ipcomp,
6597 * due to the way sadb_comb is declared in RFC2367.
6606 * outside of spec; make proposal/combination extension optional.
6612 if ((result->m_flags & M_PKTHDR) == 0) {
6617 if (result->m_len < sizeof(struct sadb_msg)) {
6618 result = m_pullup(result, sizeof(struct sadb_msg));
6619 if (result == NULL) {
6625 result->m_pkthdr.len = 0;
6626 for (m = result; m; m = m->m_next)
6627 result->m_pkthdr.len += m->m_len;
6629 mtod(result, struct sadb_msg *)->sadb_msg_len =
6630 PFKEY_UNIT64(result->m_pkthdr.len);
6633 printf("%s: SP(%p)\n", __func__, sp));
6634 KEYDBG(KEY_DATA, kdebug_secasindex(saidx, NULL));
6636 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6645 key_newacq(const struct secasindex *saidx, int *perror)
6650 acq = malloc(sizeof(*acq), M_IPSEC_SAQ, M_NOWAIT | M_ZERO);
6652 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6658 bcopy(saidx, &acq->saidx, sizeof(acq->saidx));
6659 acq->created = time_second;
6662 /* add to acqtree */
6664 seq = acq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq);
6665 LIST_INSERT_HEAD(&V_acqtree, acq, chain);
6666 LIST_INSERT_HEAD(ACQADDRHASH_HASH(saidx), acq, addrhash);
6667 LIST_INSERT_HEAD(ACQSEQHASH_HASH(seq), acq, seqhash);
6674 key_getacq(const struct secasindex *saidx, int *perror)
6680 LIST_FOREACH(acq, ACQADDRHASH_HASH(saidx), addrhash) {
6681 if (key_cmpsaidx(&acq->saidx, saidx, CMP_EXACTLY)) {
6682 if (acq->count > V_key_blockacq_count) {
6684 * Reset counter and send message.
6685 * Also reset created time to keep ACQ for
6688 acq->created = time_second;
6693 * Increment counter and do nothing.
6694 * We send SADB_ACQUIRE message only
6695 * for each V_key_blockacq_count packet.
6708 /* allocate new entry */
6709 return (key_newacq(saidx, perror));
6713 key_acqreset(uint32_t seq)
6718 LIST_FOREACH(acq, ACQSEQHASH_HASH(seq), seqhash) {
6719 if (acq->seq == seq) {
6721 acq->created = time_second;
6731 * Mark ACQ entry as stale to remove it in key_flush_acq().
6732 * Called after successful SADB_GETSPI message.
6735 key_acqdone(const struct secasindex *saidx, uint32_t seq)
6740 LIST_FOREACH(acq, ACQSEQHASH_HASH(seq), seqhash) {
6741 if (acq->seq == seq)
6745 if (key_cmpsaidx(&acq->saidx, saidx, CMP_EXACTLY) == 0) {
6746 ipseclog((LOG_DEBUG,
6747 "%s: Mismatched saidx for ACQ %u", __func__, seq));
6753 ipseclog((LOG_DEBUG,
6754 "%s: ACQ %u is not found.", __func__, seq));
6762 static struct secspacq *
6763 key_newspacq(struct secpolicyindex *spidx)
6765 struct secspacq *acq;
6768 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO);
6770 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6775 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
6776 acq->created = time_second;
6779 /* add to spacqtree */
6781 LIST_INSERT_HEAD(&V_spacqtree, acq, chain);
6787 static struct secspacq *
6788 key_getspacq(struct secpolicyindex *spidx)
6790 struct secspacq *acq;
6793 LIST_FOREACH(acq, &V_spacqtree, chain) {
6794 if (key_cmpspidx_exactly(spidx, &acq->spidx)) {
6795 /* NB: return holding spacq_lock */
6805 * SADB_ACQUIRE processing,
6806 * in first situation, is receiving
6808 * from the ikmpd, and clear sequence of its secasvar entry.
6810 * In second situation, is receiving
6811 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6812 * from a user land process, and return
6813 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6816 * m will always be freed.
6819 key_acquire2(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
6821 SAHTREE_RLOCK_TRACKER;
6822 struct sadb_address *src0, *dst0;
6823 struct secasindex saidx;
6824 struct secashead *sah;
6827 uint8_t mode, proto;
6829 IPSEC_ASSERT(so != NULL, ("null socket"));
6830 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6831 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6832 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6835 * Error message from KMd.
6836 * We assume that if error was occurred in IKEd, the length of PFKEY
6837 * message is equal to the size of sadb_msg structure.
6838 * We do not raise error even if error occurred in this function.
6840 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
6841 /* check sequence number */
6842 if (mhp->msg->sadb_msg_seq == 0 ||
6843 mhp->msg->sadb_msg_errno == 0) {
6844 ipseclog((LOG_DEBUG, "%s: must specify sequence "
6845 "number and errno.\n", __func__));
6848 * IKEd reported that error occurred.
6849 * XXXAE: what it expects from the kernel?
6850 * Probably we should send SADB_ACQUIRE again?
6851 * If so, reset ACQ's state.
6852 * XXXAE: it looks useless.
6854 key_acqreset(mhp->msg->sadb_msg_seq);
6861 * This message is from user land.
6864 /* map satype to proto */
6865 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6866 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
6868 return key_senderror(so, m, EINVAL);
6871 if (SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_SRC) ||
6872 SADB_CHECKHDR(mhp, SADB_EXT_ADDRESS_DST) ||
6873 SADB_CHECKHDR(mhp, SADB_EXT_PROPOSAL)) {
6874 ipseclog((LOG_DEBUG,
6875 "%s: invalid message: missing required header.\n",
6877 return key_senderror(so, m, EINVAL);
6879 if (SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_SRC) ||
6880 SADB_CHECKLEN(mhp, SADB_EXT_ADDRESS_DST) ||
6881 SADB_CHECKLEN(mhp, SADB_EXT_PROPOSAL)) {
6882 ipseclog((LOG_DEBUG,
6883 "%s: invalid message: wrong header size.\n", __func__));
6884 return key_senderror(so, m, EINVAL);
6887 if (SADB_CHECKHDR(mhp, SADB_X_EXT_SA2)) {
6888 mode = IPSEC_MODE_ANY;
6891 if (SADB_CHECKLEN(mhp, SADB_X_EXT_SA2)) {
6892 ipseclog((LOG_DEBUG,
6893 "%s: invalid message: wrong header size.\n",
6895 return key_senderror(so, m, EINVAL);
6897 mode = ((struct sadb_x_sa2 *)
6898 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
6899 reqid = ((struct sadb_x_sa2 *)
6900 mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
6903 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6904 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6906 error = key_checksockaddrs((struct sockaddr *)(src0 + 1),
6907 (struct sockaddr *)(dst0 + 1));
6909 ipseclog((LOG_DEBUG, "%s: invalid sockaddr.\n", __func__));
6910 return key_senderror(so, m, EINVAL);
6912 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
6914 /* get a SA index */
6916 LIST_FOREACH(sah, SAHADDRHASH_HASH(&saidx), addrhash) {
6917 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6922 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__));
6923 return key_senderror(so, m, EEXIST);
6926 error = key_acquire(&saidx, NULL);
6928 ipseclog((LOG_DEBUG,
6929 "%s: error %d returned from key_acquire()\n",
6931 return key_senderror(so, m, error);
6938 * SADB_REGISTER processing.
6939 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6942 * from the ikmpd, and register a socket to send PF_KEY messages,
6946 * If socket is detached, must free from regnode.
6948 * m will always be freed.
6951 key_register(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
6953 struct secreg *reg, *newreg = NULL;
6955 IPSEC_ASSERT(so != NULL, ("null socket"));
6956 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6957 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6958 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6960 /* check for invalid register message */
6961 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0]))
6962 return key_senderror(so, m, EINVAL);
6964 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6965 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6968 /* check whether existing or not */
6970 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) {
6971 if (reg->so == so) {
6973 ipseclog((LOG_DEBUG, "%s: socket exists already.\n",
6975 return key_senderror(so, m, EEXIST);
6979 /* create regnode */
6980 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO);
6981 if (newreg == NULL) {
6983 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6984 return key_senderror(so, m, ENOBUFS);
6988 ((struct keycb *)sotorawcb(so))->kp_registered++;
6990 /* add regnode to regtree. */
6991 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain);
6997 struct sadb_msg *newmsg;
6998 struct sadb_supported *sup;
6999 u_int len, alen, elen;
7002 struct sadb_alg *alg;
7004 /* create new sadb_msg to reply. */
7006 for (i = 1; i <= SADB_AALG_MAX; i++) {
7007 if (auth_algorithm_lookup(i))
7008 alen += sizeof(struct sadb_alg);
7011 alen += sizeof(struct sadb_supported);
7013 for (i = 1; i <= SADB_EALG_MAX; i++) {
7014 if (enc_algorithm_lookup(i))
7015 elen += sizeof(struct sadb_alg);
7018 elen += sizeof(struct sadb_supported);
7020 len = sizeof(struct sadb_msg) + alen + elen;
7023 return key_senderror(so, m, ENOBUFS);
7025 MGETHDR(n, M_NOWAIT, MT_DATA);
7027 if (!(MCLGET(n, M_NOWAIT))) {
7033 return key_senderror(so, m, ENOBUFS);
7035 n->m_pkthdr.len = n->m_len = len;
7039 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
7040 newmsg = mtod(n, struct sadb_msg *);
7041 newmsg->sadb_msg_errno = 0;
7042 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
7043 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
7045 /* for authentication algorithm */
7047 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
7048 sup->sadb_supported_len = PFKEY_UNIT64(alen);
7049 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
7050 off += PFKEY_ALIGN8(sizeof(*sup));
7052 for (i = 1; i <= SADB_AALG_MAX; i++) {
7053 const struct auth_hash *aalgo;
7054 u_int16_t minkeysize, maxkeysize;
7056 aalgo = auth_algorithm_lookup(i);
7059 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
7060 alg->sadb_alg_id = i;
7061 alg->sadb_alg_ivlen = 0;
7062 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize);
7063 alg->sadb_alg_minbits = _BITS(minkeysize);
7064 alg->sadb_alg_maxbits = _BITS(maxkeysize);
7065 off += PFKEY_ALIGN8(sizeof(*alg));
7069 /* for encryption algorithm */
7071 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
7072 sup->sadb_supported_len = PFKEY_UNIT64(elen);
7073 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
7074 off += PFKEY_ALIGN8(sizeof(*sup));
7076 for (i = 1; i <= SADB_EALG_MAX; i++) {
7077 const struct enc_xform *ealgo;
7079 ealgo = enc_algorithm_lookup(i);
7082 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
7083 alg->sadb_alg_id = i;
7084 alg->sadb_alg_ivlen = ealgo->ivsize;
7085 alg->sadb_alg_minbits = _BITS(ealgo->minkey);
7086 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey);
7087 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
7091 IPSEC_ASSERT(off == len,
7092 ("length assumption failed (off %u len %u)", off, len));
7095 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
7100 * free secreg entry registered.
7101 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
7104 key_freereg(struct socket *so)
7109 IPSEC_ASSERT(so != NULL, ("NULL so"));
7112 * check whether existing or not.
7113 * check all type of SA, because there is a potential that
7114 * one socket is registered to multiple type of SA.
7117 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7118 LIST_FOREACH(reg, &V_regtree[i], chain) {
7119 if (reg->so == so && __LIST_CHAINED(reg)) {
7120 LIST_REMOVE(reg, chain);
7121 free(reg, M_IPSEC_SAR);
7130 * SADB_EXPIRE processing
7132 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
7134 * NOTE: We send only soft lifetime extension.
7137 * others : error number
7140 key_expire(struct secasvar *sav, int hard)
7142 struct mbuf *result = NULL, *m;
7143 struct sadb_lifetime *lt;
7144 uint32_t replay_count;
7148 IPSEC_ASSERT (sav != NULL, ("null sav"));
7149 IPSEC_ASSERT (sav->sah != NULL, ("null sa header"));
7152 printf("%s: SA(%p) expired %s lifetime\n", __func__,
7153 sav, hard ? "hard": "soft"));
7154 KEYDBG(KEY_DATA, kdebug_secasv(sav));
7155 /* set msg header */
7156 satype = key_proto2satype(sav->sah->saidx.proto);
7157 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype));
7158 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
7165 /* create SA extension */
7166 m = key_setsadbsa(sav);
7173 /* create SA extension */
7175 replay_count = sav->replay ? sav->replay->count : 0;
7176 SECASVAR_UNLOCK(sav);
7178 m = key_setsadbxsa2(sav->sah->saidx.mode, replay_count,
7179 sav->sah->saidx.reqid);
7186 if (sav->replay && sav->replay->wsize > UINT8_MAX) {
7187 m = key_setsadbxsareplay(sav->replay->wsize);
7195 /* create lifetime extension (current and soft) */
7196 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
7197 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
7204 bzero(mtod(m, caddr_t), len);
7205 lt = mtod(m, struct sadb_lifetime *);
7206 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
7207 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
7208 lt->sadb_lifetime_allocations =
7209 (uint32_t)counter_u64_fetch(sav->lft_c_allocations);
7210 lt->sadb_lifetime_bytes =
7211 counter_u64_fetch(sav->lft_c_bytes);
7212 lt->sadb_lifetime_addtime = sav->created;
7213 lt->sadb_lifetime_usetime = sav->firstused;
7214 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
7215 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
7217 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
7218 lt->sadb_lifetime_allocations = sav->lft_h->allocations;
7219 lt->sadb_lifetime_bytes = sav->lft_h->bytes;
7220 lt->sadb_lifetime_addtime = sav->lft_h->addtime;
7221 lt->sadb_lifetime_usetime = sav->lft_h->usetime;
7223 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
7224 lt->sadb_lifetime_allocations = sav->lft_s->allocations;
7225 lt->sadb_lifetime_bytes = sav->lft_s->bytes;
7226 lt->sadb_lifetime_addtime = sav->lft_s->addtime;
7227 lt->sadb_lifetime_usetime = sav->lft_s->usetime;
7231 /* set sadb_address for source */
7232 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
7233 &sav->sah->saidx.src.sa,
7234 FULLMASK, IPSEC_ULPROTO_ANY);
7241 /* set sadb_address for destination */
7242 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
7243 &sav->sah->saidx.dst.sa,
7244 FULLMASK, IPSEC_ULPROTO_ANY);
7252 * XXX-BZ Handle NAT-T extensions here.
7253 * XXXAE: it doesn't seem quite useful. IKEs should not depend on
7254 * this information, we report only significant SA fields.
7257 if ((result->m_flags & M_PKTHDR) == 0) {
7262 if (result->m_len < sizeof(struct sadb_msg)) {
7263 result = m_pullup(result, sizeof(struct sadb_msg));
7264 if (result == NULL) {
7270 result->m_pkthdr.len = 0;
7271 for (m = result; m; m = m->m_next)
7272 result->m_pkthdr.len += m->m_len;
7274 mtod(result, struct sadb_msg *)->sadb_msg_len =
7275 PFKEY_UNIT64(result->m_pkthdr.len);
7277 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
7286 key_freesah_flushed(struct secashead_queue *flushq)
7288 struct secashead *sah, *nextsah;
7289 struct secasvar *sav, *nextsav;
7291 sah = TAILQ_FIRST(flushq);
7292 while (sah != NULL) {
7293 sav = TAILQ_FIRST(&sah->savtree_larval);
7294 while (sav != NULL) {
7295 nextsav = TAILQ_NEXT(sav, chain);
7296 TAILQ_REMOVE(&sah->savtree_larval, sav, chain);
7297 key_freesav(&sav); /* release last reference */
7298 key_freesah(&sah); /* release reference from SAV */
7301 sav = TAILQ_FIRST(&sah->savtree_alive);
7302 while (sav != NULL) {
7303 nextsav = TAILQ_NEXT(sav, chain);
7304 TAILQ_REMOVE(&sah->savtree_alive, sav, chain);
7305 key_freesav(&sav); /* release last reference */
7306 key_freesah(&sah); /* release reference from SAV */
7309 nextsah = TAILQ_NEXT(sah, chain);
7310 key_freesah(&sah); /* release last reference */
7316 * SADB_FLUSH processing
7319 * from the ikmpd, and free all entries in secastree.
7323 * NOTE: to do is only marking SADB_SASTATE_DEAD.
7325 * m will always be freed.
7328 key_flush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7330 struct secashead_queue flushq;
7331 struct sadb_msg *newmsg;
7332 struct secashead *sah, *nextsah;
7333 struct secasvar *sav;
7337 IPSEC_ASSERT(so != NULL, ("null socket"));
7338 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7339 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7341 /* map satype to proto */
7342 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7343 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7345 return key_senderror(so, m, EINVAL);
7348 printf("%s: proto %u\n", __func__, proto));
7350 TAILQ_INIT(&flushq);
7351 if (proto == IPSEC_PROTO_ANY) {
7352 /* no SATYPE specified, i.e. flushing all SA. */
7354 /* Move all SAHs into flushq */
7355 TAILQ_CONCAT(&flushq, &V_sahtree, chain);
7356 /* Flush all buckets in SPI hash */
7357 for (i = 0; i < V_savhash_mask + 1; i++)
7358 LIST_INIT(&V_savhashtbl[i]);
7359 /* Flush all buckets in SAHADDRHASH */
7360 for (i = 0; i < V_sahaddrhash_mask + 1; i++)
7361 LIST_INIT(&V_sahaddrhashtbl[i]);
7362 /* Mark all SAHs as unlinked */
7363 TAILQ_FOREACH(sah, &flushq, chain) {
7364 sah->state = SADB_SASTATE_DEAD;
7366 * Callout handler makes its job using
7367 * RLOCK and drain queues. In case, when this
7368 * function will be called just before it
7369 * acquires WLOCK, we need to mark SAs as
7370 * unlinked to prevent second unlink.
7372 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
7373 sav->state = SADB_SASTATE_DEAD;
7375 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
7376 sav->state = SADB_SASTATE_DEAD;
7382 sah = TAILQ_FIRST(&V_sahtree);
7383 while (sah != NULL) {
7384 IPSEC_ASSERT(sah->state != SADB_SASTATE_DEAD,
7385 ("DEAD SAH %p in SADB_FLUSH", sah));
7386 nextsah = TAILQ_NEXT(sah, chain);
7387 if (sah->saidx.proto != proto) {
7391 sah->state = SADB_SASTATE_DEAD;
7392 TAILQ_REMOVE(&V_sahtree, sah, chain);
7393 LIST_REMOVE(sah, addrhash);
7394 /* Unlink all SAs from SPI hash */
7395 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
7396 LIST_REMOVE(sav, spihash);
7397 sav->state = SADB_SASTATE_DEAD;
7399 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
7400 LIST_REMOVE(sav, spihash);
7401 sav->state = SADB_SASTATE_DEAD;
7403 /* Add SAH into flushq */
7404 TAILQ_INSERT_HEAD(&flushq, sah, chain);
7410 key_freesah_flushed(&flushq);
7411 /* Free all queued SAs and SAHs */
7412 if (m->m_len < sizeof(struct sadb_msg) ||
7413 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
7414 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
7415 return key_senderror(so, m, ENOBUFS);
7421 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
7422 newmsg = mtod(m, struct sadb_msg *);
7423 newmsg->sadb_msg_errno = 0;
7424 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
7426 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7430 * SADB_DUMP processing
7431 * dump all entries including status of DEAD in SAD.
7434 * from the ikmpd, and dump all secasvar leaves
7439 * m will always be freed.
7442 key_dump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7444 SAHTREE_RLOCK_TRACKER;
7445 struct secashead *sah;
7446 struct secasvar *sav;
7447 struct sadb_msg *newmsg;
7450 uint8_t proto, satype;
7452 IPSEC_ASSERT(so != NULL, ("null socket"));
7453 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7454 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7455 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7457 /* map satype to proto */
7458 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7459 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7461 return key_senderror(so, m, EINVAL);
7464 /* count sav entries to be sent to the userland. */
7467 TAILQ_FOREACH(sah, &V_sahtree, chain) {
7468 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC &&
7469 proto != sah->saidx.proto)
7472 TAILQ_FOREACH(sav, &sah->savtree_larval, chain)
7474 TAILQ_FOREACH(sav, &sah->savtree_alive, chain)
7480 return key_senderror(so, m, ENOENT);
7483 /* send this to the userland, one at a time. */
7485 TAILQ_FOREACH(sah, &V_sahtree, chain) {
7486 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC &&
7487 proto != sah->saidx.proto)
7490 /* map proto to satype */
7491 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
7493 ipseclog((LOG_DEBUG, "%s: there was invalid proto in "
7494 "SAD.\n", __func__));
7495 return key_senderror(so, m, EINVAL);
7497 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
7498 n = key_setdumpsa(sav, SADB_DUMP, satype,
7499 --cnt, mhp->msg->sadb_msg_pid);
7502 return key_senderror(so, m, ENOBUFS);
7504 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
7506 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
7507 n = key_setdumpsa(sav, SADB_DUMP, satype,
7508 --cnt, mhp->msg->sadb_msg_pid);
7511 return key_senderror(so, m, ENOBUFS);
7513 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
7521 * SADB_X_PROMISC processing
7523 * m will always be freed.
7526 key_promisc(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
7530 IPSEC_ASSERT(so != NULL, ("null socket"));
7531 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7532 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7533 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7535 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7537 if (olen < sizeof(struct sadb_msg)) {
7539 return key_senderror(so, m, EINVAL);
7544 } else if (olen == sizeof(struct sadb_msg)) {
7545 /* enable/disable promisc mode */
7548 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
7549 return key_senderror(so, m, EINVAL);
7550 mhp->msg->sadb_msg_errno = 0;
7551 switch (mhp->msg->sadb_msg_satype) {
7554 kp->kp_promisc = mhp->msg->sadb_msg_satype;
7557 return key_senderror(so, m, EINVAL);
7560 /* send the original message back to everyone */
7561 mhp->msg->sadb_msg_errno = 0;
7562 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7564 /* send packet as is */
7566 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
7568 /* TODO: if sadb_msg_seq is specified, send to specific pid */
7569 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7573 static int (*key_typesw[])(struct socket *, struct mbuf *,
7574 const struct sadb_msghdr *) = {
7575 NULL, /* SADB_RESERVED */
7576 key_getspi, /* SADB_GETSPI */
7577 key_update, /* SADB_UPDATE */
7578 key_add, /* SADB_ADD */
7579 key_delete, /* SADB_DELETE */
7580 key_get, /* SADB_GET */
7581 key_acquire2, /* SADB_ACQUIRE */
7582 key_register, /* SADB_REGISTER */
7583 NULL, /* SADB_EXPIRE */
7584 key_flush, /* SADB_FLUSH */
7585 key_dump, /* SADB_DUMP */
7586 key_promisc, /* SADB_X_PROMISC */
7587 NULL, /* SADB_X_PCHANGE */
7588 key_spdadd, /* SADB_X_SPDUPDATE */
7589 key_spdadd, /* SADB_X_SPDADD */
7590 key_spddelete, /* SADB_X_SPDDELETE */
7591 key_spdget, /* SADB_X_SPDGET */
7592 NULL, /* SADB_X_SPDACQUIRE */
7593 key_spddump, /* SADB_X_SPDDUMP */
7594 key_spdflush, /* SADB_X_SPDFLUSH */
7595 key_spdadd, /* SADB_X_SPDSETIDX */
7596 NULL, /* SADB_X_SPDEXPIRE */
7597 key_spddelete2, /* SADB_X_SPDDELETE2 */
7601 * parse sadb_msg buffer to process PFKEYv2,
7602 * and create a data to response if needed.
7603 * I think to be dealed with mbuf directly.
7605 * msgp : pointer to pointer to a received buffer pulluped.
7606 * This is rewrited to response.
7607 * so : pointer to socket.
7609 * length for buffer to send to user process.
7612 key_parse(struct mbuf *m, struct socket *so)
7614 struct sadb_msg *msg;
7615 struct sadb_msghdr mh;
7620 IPSEC_ASSERT(so != NULL, ("null socket"));
7621 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7623 if (m->m_len < sizeof(struct sadb_msg)) {
7624 m = m_pullup(m, sizeof(struct sadb_msg));
7628 msg = mtod(m, struct sadb_msg *);
7629 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
7630 target = KEY_SENDUP_ONE;
7632 if ((m->m_flags & M_PKTHDR) == 0 || m->m_pkthdr.len != orglen) {
7633 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__));
7634 PFKEYSTAT_INC(out_invlen);
7639 if (msg->sadb_msg_version != PF_KEY_V2) {
7640 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n",
7641 __func__, msg->sadb_msg_version));
7642 PFKEYSTAT_INC(out_invver);
7647 if (msg->sadb_msg_type > SADB_MAX) {
7648 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
7649 __func__, msg->sadb_msg_type));
7650 PFKEYSTAT_INC(out_invmsgtype);
7655 /* for old-fashioned code - should be nuked */
7656 if (m->m_pkthdr.len > MCLBYTES) {
7663 MGETHDR(n, M_NOWAIT, MT_DATA);
7664 if (n && m->m_pkthdr.len > MHLEN) {
7665 if (!(MCLGET(n, M_NOWAIT))) {
7674 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
7675 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
7681 /* align the mbuf chain so that extensions are in contiguous region. */
7682 error = key_align(m, &mh);
7688 /* We use satype as scope mask for spddump */
7689 if (msg->sadb_msg_type == SADB_X_SPDDUMP) {
7690 switch (msg->sadb_msg_satype) {
7691 case IPSEC_POLICYSCOPE_ANY:
7692 case IPSEC_POLICYSCOPE_GLOBAL:
7693 case IPSEC_POLICYSCOPE_IFNET:
7694 case IPSEC_POLICYSCOPE_PCB:
7697 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n",
7698 __func__, msg->sadb_msg_type));
7699 PFKEYSTAT_INC(out_invsatype);
7704 switch (msg->sadb_msg_satype) { /* check SA type */
7705 case SADB_SATYPE_UNSPEC:
7706 switch (msg->sadb_msg_type) {
7714 ipseclog((LOG_DEBUG, "%s: must specify satype "
7715 "when msg type=%u.\n", __func__,
7716 msg->sadb_msg_type));
7717 PFKEYSTAT_INC(out_invsatype);
7722 case SADB_SATYPE_AH:
7723 case SADB_SATYPE_ESP:
7724 case SADB_X_SATYPE_IPCOMP:
7725 case SADB_X_SATYPE_TCPSIGNATURE:
7726 switch (msg->sadb_msg_type) {
7728 case SADB_X_SPDDELETE:
7730 case SADB_X_SPDFLUSH:
7731 case SADB_X_SPDSETIDX:
7732 case SADB_X_SPDUPDATE:
7733 case SADB_X_SPDDELETE2:
7734 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n",
7735 __func__, msg->sadb_msg_type));
7736 PFKEYSTAT_INC(out_invsatype);
7741 case SADB_SATYPE_RSVP:
7742 case SADB_SATYPE_OSPFV2:
7743 case SADB_SATYPE_RIPV2:
7744 case SADB_SATYPE_MIP:
7745 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n",
7746 __func__, msg->sadb_msg_satype));
7747 PFKEYSTAT_INC(out_invsatype);
7750 case 1: /* XXX: What does it do? */
7751 if (msg->sadb_msg_type == SADB_X_PROMISC)
7755 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
7756 __func__, msg->sadb_msg_satype));
7757 PFKEYSTAT_INC(out_invsatype);
7763 /* check field of upper layer protocol and address family */
7764 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
7765 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
7766 struct sadb_address *src0, *dst0;
7769 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
7770 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
7772 /* check upper layer protocol */
7773 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
7774 ipseclog((LOG_DEBUG, "%s: upper layer protocol "
7775 "mismatched.\n", __func__));
7776 PFKEYSTAT_INC(out_invaddr);
7782 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
7783 PFKEY_ADDR_SADDR(dst0)->sa_family) {
7784 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n",
7786 PFKEYSTAT_INC(out_invaddr);
7790 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7791 PFKEY_ADDR_SADDR(dst0)->sa_len) {
7792 ipseclog((LOG_DEBUG, "%s: address struct size "
7793 "mismatched.\n", __func__));
7794 PFKEYSTAT_INC(out_invaddr);
7799 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7801 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7802 sizeof(struct sockaddr_in)) {
7803 PFKEYSTAT_INC(out_invaddr);
7809 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7810 sizeof(struct sockaddr_in6)) {
7811 PFKEYSTAT_INC(out_invaddr);
7817 ipseclog((LOG_DEBUG, "%s: unsupported address family\n",
7819 PFKEYSTAT_INC(out_invaddr);
7820 error = EAFNOSUPPORT;
7824 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7826 plen = sizeof(struct in_addr) << 3;
7829 plen = sizeof(struct in6_addr) << 3;
7832 plen = 0; /*fool gcc*/
7836 /* check max prefix length */
7837 if (src0->sadb_address_prefixlen > plen ||
7838 dst0->sadb_address_prefixlen > plen) {
7839 ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n",
7841 PFKEYSTAT_INC(out_invaddr);
7847 * prefixlen == 0 is valid because there can be a case when
7848 * all addresses are matched.
7852 if (msg->sadb_msg_type >= nitems(key_typesw) ||
7853 key_typesw[msg->sadb_msg_type] == NULL) {
7854 PFKEYSTAT_INC(out_invmsgtype);
7859 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
7862 msg->sadb_msg_errno = error;
7863 return key_sendup_mbuf(so, m, target);
7867 key_senderror(struct socket *so, struct mbuf *m, int code)
7869 struct sadb_msg *msg;
7871 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
7872 ("mbuf too small, len %u", m->m_len));
7874 msg = mtod(m, struct sadb_msg *);
7875 msg->sadb_msg_errno = code;
7876 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
7880 * set the pointer to each header into message buffer.
7881 * m will be freed on error.
7882 * XXX larger-than-MCLBYTES extension?
7885 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
7888 struct sadb_ext *ext;
7893 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7894 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7895 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
7896 ("mbuf too small, len %u", m->m_len));
7899 bzero(mhp, sizeof(*mhp));
7901 mhp->msg = mtod(m, struct sadb_msg *);
7902 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
7904 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7905 extlen = end; /*just in case extlen is not updated*/
7906 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
7907 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
7909 /* m is already freed */
7912 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7915 switch (ext->sadb_ext_type) {
7917 case SADB_EXT_ADDRESS_SRC:
7918 case SADB_EXT_ADDRESS_DST:
7919 case SADB_EXT_ADDRESS_PROXY:
7920 case SADB_EXT_LIFETIME_CURRENT:
7921 case SADB_EXT_LIFETIME_HARD:
7922 case SADB_EXT_LIFETIME_SOFT:
7923 case SADB_EXT_KEY_AUTH:
7924 case SADB_EXT_KEY_ENCRYPT:
7925 case SADB_EXT_IDENTITY_SRC:
7926 case SADB_EXT_IDENTITY_DST:
7927 case SADB_EXT_SENSITIVITY:
7928 case SADB_EXT_PROPOSAL:
7929 case SADB_EXT_SUPPORTED_AUTH:
7930 case SADB_EXT_SUPPORTED_ENCRYPT:
7931 case SADB_EXT_SPIRANGE:
7932 case SADB_X_EXT_POLICY:
7933 case SADB_X_EXT_SA2:
7934 case SADB_X_EXT_NAT_T_TYPE:
7935 case SADB_X_EXT_NAT_T_SPORT:
7936 case SADB_X_EXT_NAT_T_DPORT:
7937 case SADB_X_EXT_NAT_T_OAI:
7938 case SADB_X_EXT_NAT_T_OAR:
7939 case SADB_X_EXT_NAT_T_FRAG:
7940 case SADB_X_EXT_SA_REPLAY:
7941 case SADB_X_EXT_NEW_ADDRESS_SRC:
7942 case SADB_X_EXT_NEW_ADDRESS_DST:
7943 /* duplicate check */
7945 * XXX Are there duplication payloads of either
7946 * KEY_AUTH or KEY_ENCRYPT ?
7948 if (mhp->ext[ext->sadb_ext_type] != NULL) {
7949 ipseclog((LOG_DEBUG, "%s: duplicate ext_type "
7950 "%u\n", __func__, ext->sadb_ext_type));
7952 PFKEYSTAT_INC(out_dupext);
7957 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n",
7958 __func__, ext->sadb_ext_type));
7960 PFKEYSTAT_INC(out_invexttype);
7964 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
7966 if (key_validate_ext(ext, extlen)) {
7968 PFKEYSTAT_INC(out_invlen);
7972 n = m_pulldown(m, off, extlen, &toff);
7974 /* m is already freed */
7977 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7979 mhp->ext[ext->sadb_ext_type] = ext;
7980 mhp->extoff[ext->sadb_ext_type] = off;
7981 mhp->extlen[ext->sadb_ext_type] = extlen;
7986 PFKEYSTAT_INC(out_invlen);
7994 key_validate_ext(const struct sadb_ext *ext, int len)
7996 const struct sockaddr *sa;
7997 enum { NONE, ADDR } checktype = NONE;
7999 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
8001 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
8004 /* if it does not match minimum/maximum length, bail */
8005 if (ext->sadb_ext_type >= nitems(minsize) ||
8006 ext->sadb_ext_type >= nitems(maxsize))
8008 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
8010 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
8013 /* more checks based on sadb_ext_type XXX need more */
8014 switch (ext->sadb_ext_type) {
8015 case SADB_EXT_ADDRESS_SRC:
8016 case SADB_EXT_ADDRESS_DST:
8017 case SADB_EXT_ADDRESS_PROXY:
8018 case SADB_X_EXT_NAT_T_OAI:
8019 case SADB_X_EXT_NAT_T_OAR:
8020 case SADB_X_EXT_NEW_ADDRESS_SRC:
8021 case SADB_X_EXT_NEW_ADDRESS_DST:
8022 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
8025 case SADB_EXT_IDENTITY_SRC:
8026 case SADB_EXT_IDENTITY_DST:
8027 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
8028 SADB_X_IDENTTYPE_ADDR) {
8029 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
8039 switch (checktype) {
8043 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen);
8044 if (len < baselen + sal)
8046 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
8059 for (i = 0; i < IPSEC_DIR_MAX; i++) {
8060 TAILQ_INIT(&V_sptree[i]);
8061 TAILQ_INIT(&V_sptree_ifnet[i]);
8064 V_key_lft_zone = uma_zcreate("IPsec SA lft_c",
8065 sizeof(uint64_t) * 2, NULL, NULL, NULL, NULL,
8066 UMA_ALIGN_PTR, UMA_ZONE_PCPU);
8068 TAILQ_INIT(&V_sahtree);
8069 V_sphashtbl = hashinit(SPHASH_NHASH, M_IPSEC_SP, &V_sphash_mask);
8070 V_savhashtbl = hashinit(SAVHASH_NHASH, M_IPSEC_SA, &V_savhash_mask);
8071 V_sahaddrhashtbl = hashinit(SAHHASH_NHASH, M_IPSEC_SAH,
8072 &V_sahaddrhash_mask);
8073 V_acqaddrhashtbl = hashinit(ACQHASH_NHASH, M_IPSEC_SAQ,
8074 &V_acqaddrhash_mask);
8075 V_acqseqhashtbl = hashinit(ACQHASH_NHASH, M_IPSEC_SAQ,
8076 &V_acqseqhash_mask);
8078 for (i = 0; i <= SADB_SATYPE_MAX; i++)
8079 LIST_INIT(&V_regtree[i]);
8081 LIST_INIT(&V_acqtree);
8082 LIST_INIT(&V_spacqtree);
8084 if (!IS_DEFAULT_VNET(curvnet))
8089 REGTREE_LOCK_INIT();
8090 SAHTREE_LOCK_INIT();
8094 #ifndef IPSEC_DEBUG2
8095 callout_init(&key_timer, 1);
8096 callout_reset(&key_timer, hz, key_timehandler, NULL);
8097 #endif /*IPSEC_DEBUG2*/
8099 /* initialize key statistics */
8100 keystat.getspi_count = 1;
8103 printf("IPsec: Initialized Security Association Processing.\n");
8110 struct secashead_queue sahdrainq;
8111 struct secpolicy_queue drainq;
8112 struct secpolicy *sp, *nextsp;
8113 struct secacq *acq, *nextacq;
8114 struct secspacq *spacq, *nextspacq;
8115 struct secashead *sah;
8116 struct secasvar *sav;
8121 * XXX: can we just call free() for each object without
8122 * walking through safe way with releasing references?
8124 TAILQ_INIT(&drainq);
8126 for (i = 0; i < IPSEC_DIR_MAX; i++) {
8127 TAILQ_CONCAT(&drainq, &V_sptree[i], chain);
8128 TAILQ_CONCAT(&drainq, &V_sptree_ifnet[i], chain);
8131 sp = TAILQ_FIRST(&drainq);
8132 while (sp != NULL) {
8133 nextsp = TAILQ_NEXT(sp, chain);
8138 TAILQ_INIT(&sahdrainq);
8140 TAILQ_CONCAT(&sahdrainq, &V_sahtree, chain);
8141 for (i = 0; i < V_savhash_mask + 1; i++)
8142 LIST_INIT(&V_savhashtbl[i]);
8143 for (i = 0; i < V_sahaddrhash_mask + 1; i++)
8144 LIST_INIT(&V_sahaddrhashtbl[i]);
8145 TAILQ_FOREACH(sah, &sahdrainq, chain) {
8146 sah->state = SADB_SASTATE_DEAD;
8147 TAILQ_FOREACH(sav, &sah->savtree_larval, chain) {
8148 sav->state = SADB_SASTATE_DEAD;
8150 TAILQ_FOREACH(sav, &sah->savtree_alive, chain) {
8151 sav->state = SADB_SASTATE_DEAD;
8156 key_freesah_flushed(&sahdrainq);
8157 hashdestroy(V_sphashtbl, M_IPSEC_SP, V_sphash_mask);
8158 hashdestroy(V_savhashtbl, M_IPSEC_SA, V_savhash_mask);
8159 hashdestroy(V_sahaddrhashtbl, M_IPSEC_SAH, V_sahaddrhash_mask);
8162 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
8163 LIST_FOREACH(reg, &V_regtree[i], chain) {
8164 if (__LIST_CHAINED(reg)) {
8165 LIST_REMOVE(reg, chain);
8166 free(reg, M_IPSEC_SAR);
8174 acq = LIST_FIRST(&V_acqtree);
8175 while (acq != NULL) {
8176 nextacq = LIST_NEXT(acq, chain);
8177 LIST_REMOVE(acq, chain);
8178 free(acq, M_IPSEC_SAQ);
8184 for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL;
8185 spacq = nextspacq) {
8186 nextspacq = LIST_NEXT(spacq, chain);
8187 if (__LIST_CHAINED(spacq)) {
8188 LIST_REMOVE(spacq, chain);
8189 free(spacq, M_IPSEC_SAQ);
8193 hashdestroy(V_acqaddrhashtbl, M_IPSEC_SAQ, V_acqaddrhash_mask);
8194 hashdestroy(V_acqseqhashtbl, M_IPSEC_SAQ, V_acqseqhash_mask);
8195 uma_zdestroy(V_key_lft_zone);
8199 /* record data transfer on SA, and update timestamps */
8201 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
8203 IPSEC_ASSERT(sav != NULL, ("Null secasvar"));
8204 IPSEC_ASSERT(m != NULL, ("Null mbuf"));
8207 * XXX Currently, there is a difference of bytes size
8208 * between inbound and outbound processing.
8210 counter_u64_add(sav->lft_c_bytes, m->m_pkthdr.len);
8213 * We use the number of packets as the unit of
8214 * allocations. We increment the variable
8215 * whenever {esp,ah}_{in,out}put is called.
8217 counter_u64_add(sav->lft_c_allocations, 1);
8220 * NOTE: We record CURRENT usetime by using wall clock,
8221 * in seconds. HARD and SOFT lifetime are measured by the time
8222 * difference (again in seconds) from usetime.
8226 * -----+-----+--------+---> t
8227 * <--------------> HARD
8230 if (sav->firstused == 0)
8231 sav->firstused = time_second;
8235 * Take one of the kernel's security keys and convert it into a PF_KEY
8236 * structure within an mbuf, suitable for sending up to a waiting
8237 * application in user land.
8240 * src: A pointer to a kernel security key.
8241 * exttype: Which type of key this is. Refer to the PF_KEY data structures.
8243 * a valid mbuf or NULL indicating an error
8247 static struct mbuf *
8248 key_setkey(struct seckey *src, uint16_t exttype)
8257 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src));
8258 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
8263 p = mtod(m, struct sadb_key *);
8265 p->sadb_key_len = PFKEY_UNIT64(len);
8266 p->sadb_key_exttype = exttype;
8267 p->sadb_key_bits = src->bits;
8268 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src));
8274 * Take one of the kernel's lifetime data structures and convert it
8275 * into a PF_KEY structure within an mbuf, suitable for sending up to
8276 * a waiting application in user land.
8279 * src: A pointer to a kernel lifetime structure.
8280 * exttype: Which type of lifetime this is. Refer to the PF_KEY
8281 * data structures for more information.
8283 * a valid mbuf or NULL indicating an error
8287 static struct mbuf *
8288 key_setlifetime(struct seclifetime *src, uint16_t exttype)
8290 struct mbuf *m = NULL;
8291 struct sadb_lifetime *p;
8292 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime));
8297 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
8302 p = mtod(m, struct sadb_lifetime *);
8305 p->sadb_lifetime_len = PFKEY_UNIT64(len);
8306 p->sadb_lifetime_exttype = exttype;
8307 p->sadb_lifetime_allocations = src->allocations;
8308 p->sadb_lifetime_bytes = src->bytes;
8309 p->sadb_lifetime_addtime = src->addtime;
8310 p->sadb_lifetime_usetime = src->usetime;
8316 const struct enc_xform *
8317 enc_algorithm_lookup(int alg)
8321 for (i = 0; i < nitems(supported_ealgs); i++)
8322 if (alg == supported_ealgs[i].sadb_alg)
8323 return (supported_ealgs[i].xform);
8327 const struct auth_hash *
8328 auth_algorithm_lookup(int alg)
8332 for (i = 0; i < nitems(supported_aalgs); i++)
8333 if (alg == supported_aalgs[i].sadb_alg)
8334 return (supported_aalgs[i].xform);
8338 const struct comp_algo *
8339 comp_algorithm_lookup(int alg)
8343 for (i = 0; i < nitems(supported_calgs); i++)
8344 if (alg == supported_calgs[i].sadb_alg)
8345 return (supported_calgs[i].xform);
8350 * Register a transform.
8353 xform_register(struct xformsw* xsp)
8355 struct xformsw *entry;
8358 LIST_FOREACH(entry, &xforms, chain) {
8359 if (entry->xf_type == xsp->xf_type) {
8364 LIST_INSERT_HEAD(&xforms, xsp, chain);
8370 xform_attach(void *data)
8372 struct xformsw *xsp = (struct xformsw *)data;
8374 if (xform_register(xsp) != 0)
8375 printf("%s: failed to register %s xform\n", __func__,
8380 xform_detach(void *data)
8382 struct xformsw *xsp = (struct xformsw *)data;
8385 LIST_REMOVE(xsp, chain);
8388 /* Delete all SAs related to this xform. */
8389 key_delete_xform(xsp);
8393 * Initialize transform support in an sav.
8396 xform_init(struct secasvar *sav, u_short xftype)
8398 struct xformsw *entry;
8401 IPSEC_ASSERT(sav->tdb_xform == NULL,
8402 ("tdb_xform is already initialized"));
8406 LIST_FOREACH(entry, &xforms, chain) {
8407 if (entry->xf_type == xftype) {
8408 ret = (*entry->xf_init)(sav, entry);