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>
46 #include <sys/mutex.h>
48 #include <sys/domain.h>
49 #include <sys/protosw.h>
50 #include <sys/malloc.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/sysctl.h>
54 #include <sys/errno.h>
56 #include <sys/queue.h>
57 #include <sys/refcount.h>
58 #include <sys/syslog.h>
61 #include <net/if_var.h>
62 #include <net/route.h>
64 #include <net/raw_cb.h>
66 #include <netinet/in.h>
67 #include <netinet/in_systm.h>
68 #include <netinet/ip.h>
69 #include <netinet/in_var.h>
72 #include <netinet/ip6.h>
73 #include <netinet6/in6_var.h>
74 #include <netinet6/ip6_var.h>
77 #if defined(INET) || defined(INET6)
78 #include <netinet/in_pcb.h>
81 #include <netinet6/in6_pcb.h>
84 #include <net/pfkeyv2.h>
85 #include <netipsec/keydb.h>
86 #include <netipsec/key.h>
87 #include <netipsec/keysock.h>
88 #include <netipsec/key_debug.h>
90 #include <netipsec/ipsec.h>
92 #include <netipsec/ipsec6.h>
95 #include <netipsec/xform.h>
97 #include <machine/stdarg.h>
100 #include <sys/random.h>
102 #define FULLMASK 0xff
103 #define _BITS(bytes) ((bytes) << 3)
106 * Note on SA reference counting:
107 * - SAs that are not in DEAD state will have (total external reference + 1)
108 * following value in reference count field. they cannot be freed and are
109 * referenced from SA header.
110 * - SAs that are in DEAD state will have (total external reference)
111 * in reference count field. they are ready to be freed. reference from
112 * SA header will be removed in key_delsav(), when the reference count
113 * field hits 0 (= no external reference other than from SA header.
116 VNET_DEFINE(u_int32_t, key_debug_level) = 0;
117 static VNET_DEFINE(u_int, key_spi_trycnt) = 1000;
118 static VNET_DEFINE(u_int32_t, key_spi_minval) = 0x100;
119 static VNET_DEFINE(u_int32_t, key_spi_maxval) = 0x0fffffff; /* XXX */
120 static VNET_DEFINE(u_int32_t, policy_id) = 0;
121 /*interval to initialize randseed,1(m)*/
122 static VNET_DEFINE(u_int, key_int_random) = 60;
123 /* interval to expire acquiring, 30(s)*/
124 static VNET_DEFINE(u_int, key_larval_lifetime) = 30;
125 /* counter for blocking SADB_ACQUIRE.*/
126 static VNET_DEFINE(int, key_blockacq_count) = 10;
127 /* lifetime for blocking SADB_ACQUIRE.*/
128 static VNET_DEFINE(int, key_blockacq_lifetime) = 20;
129 /* preferred old sa rather than new sa.*/
130 static VNET_DEFINE(int, key_preferred_oldsa) = 1;
131 #define V_key_spi_trycnt VNET(key_spi_trycnt)
132 #define V_key_spi_minval VNET(key_spi_minval)
133 #define V_key_spi_maxval VNET(key_spi_maxval)
134 #define V_policy_id VNET(policy_id)
135 #define V_key_int_random VNET(key_int_random)
136 #define V_key_larval_lifetime VNET(key_larval_lifetime)
137 #define V_key_blockacq_count VNET(key_blockacq_count)
138 #define V_key_blockacq_lifetime VNET(key_blockacq_lifetime)
139 #define V_key_preferred_oldsa VNET(key_preferred_oldsa)
141 static VNET_DEFINE(u_int32_t, acq_seq) = 0;
142 #define V_acq_seq VNET(acq_seq)
145 static VNET_DEFINE(LIST_HEAD(_sptree, secpolicy), sptree[IPSEC_DIR_MAX]);
146 #define V_sptree VNET(sptree)
147 static struct mtx sptree_lock;
148 #define SPTREE_LOCK_INIT() \
149 mtx_init(&sptree_lock, "sptree", \
150 "fast ipsec security policy database", MTX_DEF)
151 #define SPTREE_LOCK_DESTROY() mtx_destroy(&sptree_lock)
152 #define SPTREE_LOCK() mtx_lock(&sptree_lock)
153 #define SPTREE_UNLOCK() mtx_unlock(&sptree_lock)
154 #define SPTREE_LOCK_ASSERT() mtx_assert(&sptree_lock, MA_OWNED)
156 static VNET_DEFINE(LIST_HEAD(_sahtree, secashead), sahtree); /* SAD */
157 #define V_sahtree VNET(sahtree)
158 static struct mtx sahtree_lock;
159 #define SAHTREE_LOCK_INIT() \
160 mtx_init(&sahtree_lock, "sahtree", \
161 "fast ipsec security association database", MTX_DEF)
162 #define SAHTREE_LOCK_DESTROY() mtx_destroy(&sahtree_lock)
163 #define SAHTREE_LOCK() mtx_lock(&sahtree_lock)
164 #define SAHTREE_UNLOCK() mtx_unlock(&sahtree_lock)
165 #define SAHTREE_LOCK_ASSERT() mtx_assert(&sahtree_lock, MA_OWNED)
168 static VNET_DEFINE(LIST_HEAD(_regtree, secreg), regtree[SADB_SATYPE_MAX + 1]);
169 #define V_regtree VNET(regtree)
170 static struct mtx regtree_lock;
171 #define REGTREE_LOCK_INIT() \
172 mtx_init(®tree_lock, "regtree", "fast ipsec regtree", MTX_DEF)
173 #define REGTREE_LOCK_DESTROY() mtx_destroy(®tree_lock)
174 #define REGTREE_LOCK() mtx_lock(®tree_lock)
175 #define REGTREE_UNLOCK() mtx_unlock(®tree_lock)
176 #define REGTREE_LOCK_ASSERT() mtx_assert(®tree_lock, MA_OWNED)
178 static VNET_DEFINE(LIST_HEAD(_acqtree, secacq), acqtree); /* acquiring list */
179 #define V_acqtree VNET(acqtree)
180 static struct mtx acq_lock;
181 #define ACQ_LOCK_INIT() \
182 mtx_init(&acq_lock, "acqtree", "fast ipsec acquire list", MTX_DEF)
183 #define ACQ_LOCK_DESTROY() mtx_destroy(&acq_lock)
184 #define ACQ_LOCK() mtx_lock(&acq_lock)
185 #define ACQ_UNLOCK() mtx_unlock(&acq_lock)
186 #define ACQ_LOCK_ASSERT() mtx_assert(&acq_lock, MA_OWNED)
188 /* SP acquiring list */
189 static VNET_DEFINE(LIST_HEAD(_spacqtree, secspacq), spacqtree);
190 #define V_spacqtree VNET(spacqtree)
191 static struct mtx spacq_lock;
192 #define SPACQ_LOCK_INIT() \
193 mtx_init(&spacq_lock, "spacqtree", \
194 "fast ipsec security policy acquire list", MTX_DEF)
195 #define SPACQ_LOCK_DESTROY() mtx_destroy(&spacq_lock)
196 #define SPACQ_LOCK() mtx_lock(&spacq_lock)
197 #define SPACQ_UNLOCK() mtx_unlock(&spacq_lock)
198 #define SPACQ_LOCK_ASSERT() mtx_assert(&spacq_lock, MA_OWNED)
200 /* search order for SAs */
201 static const u_int saorder_state_valid_prefer_old[] = {
202 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
204 static const u_int saorder_state_valid_prefer_new[] = {
205 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
207 static const u_int saorder_state_alive[] = {
209 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
211 static const u_int saorder_state_any[] = {
212 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
213 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
216 static const int minsize[] = {
217 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
218 sizeof(struct sadb_sa), /* SADB_EXT_SA */
219 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
220 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
221 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
222 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
223 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
224 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
225 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
226 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
227 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
228 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
229 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
230 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
231 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
232 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
233 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
234 0, /* SADB_X_EXT_KMPRIVATE */
235 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
236 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
237 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
238 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
239 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
240 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAI */
241 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OAR */
242 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
244 static const int maxsize[] = {
245 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
246 sizeof(struct sadb_sa), /* SADB_EXT_SA */
247 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
248 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
249 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
250 0, /* SADB_EXT_ADDRESS_SRC */
251 0, /* SADB_EXT_ADDRESS_DST */
252 0, /* SADB_EXT_ADDRESS_PROXY */
253 0, /* SADB_EXT_KEY_AUTH */
254 0, /* SADB_EXT_KEY_ENCRYPT */
255 0, /* SADB_EXT_IDENTITY_SRC */
256 0, /* SADB_EXT_IDENTITY_DST */
257 0, /* SADB_EXT_SENSITIVITY */
258 0, /* SADB_EXT_PROPOSAL */
259 0, /* SADB_EXT_SUPPORTED_AUTH */
260 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
261 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
262 0, /* SADB_X_EXT_KMPRIVATE */
263 0, /* SADB_X_EXT_POLICY */
264 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
265 sizeof(struct sadb_x_nat_t_type),/* SADB_X_EXT_NAT_T_TYPE */
266 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_SPORT */
267 sizeof(struct sadb_x_nat_t_port),/* SADB_X_EXT_NAT_T_DPORT */
268 0, /* SADB_X_EXT_NAT_T_OAI */
269 0, /* SADB_X_EXT_NAT_T_OAR */
270 sizeof(struct sadb_x_nat_t_frag),/* SADB_X_EXT_NAT_T_FRAG */
273 static VNET_DEFINE(int, ipsec_esp_keymin) = 256;
274 static VNET_DEFINE(int, ipsec_esp_auth) = 0;
275 static VNET_DEFINE(int, ipsec_ah_keymin) = 128;
277 #define V_ipsec_esp_keymin VNET(ipsec_esp_keymin)
278 #define V_ipsec_esp_auth VNET(ipsec_esp_auth)
279 #define V_ipsec_ah_keymin VNET(ipsec_ah_keymin)
282 SYSCTL_DECL(_net_key);
285 SYSCTL_VNET_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug,
286 CTLFLAG_RW, &VNET_NAME(key_debug_level), 0, "");
288 /* max count of trial for the decision of spi value */
289 SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt,
290 CTLFLAG_RW, &VNET_NAME(key_spi_trycnt), 0, "");
292 /* minimum spi value to allocate automatically. */
293 SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MIN_VALUE,
294 spi_minval, CTLFLAG_RW, &VNET_NAME(key_spi_minval), 0, "");
296 /* maximun spi value to allocate automatically. */
297 SYSCTL_VNET_INT(_net_key, KEYCTL_SPI_MAX_VALUE,
298 spi_maxval, CTLFLAG_RW, &VNET_NAME(key_spi_maxval), 0, "");
300 /* interval to initialize randseed */
301 SYSCTL_VNET_INT(_net_key, KEYCTL_RANDOM_INT,
302 int_random, CTLFLAG_RW, &VNET_NAME(key_int_random), 0, "");
304 /* lifetime for larval SA */
305 SYSCTL_VNET_INT(_net_key, KEYCTL_LARVAL_LIFETIME,
306 larval_lifetime, CTLFLAG_RW, &VNET_NAME(key_larval_lifetime), 0, "");
308 /* counter for blocking to send SADB_ACQUIRE to IKEd */
309 SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_COUNT,
310 blockacq_count, CTLFLAG_RW, &VNET_NAME(key_blockacq_count), 0, "");
312 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
313 SYSCTL_VNET_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME,
314 blockacq_lifetime, CTLFLAG_RW, &VNET_NAME(key_blockacq_lifetime), 0, "");
317 SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth,
318 CTLFLAG_RW, &VNET_NAME(ipsec_esp_auth), 0, "");
320 /* minimum ESP key length */
321 SYSCTL_VNET_INT(_net_key, KEYCTL_ESP_KEYMIN,
322 esp_keymin, CTLFLAG_RW, &VNET_NAME(ipsec_esp_keymin), 0, "");
324 /* minimum AH key length */
325 SYSCTL_VNET_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin,
326 CTLFLAG_RW, &VNET_NAME(ipsec_ah_keymin), 0, "");
328 /* perfered old SA rather than new SA */
329 SYSCTL_VNET_INT(_net_key, KEYCTL_PREFERED_OLDSA,
330 preferred_oldsa, CTLFLAG_RW, &VNET_NAME(key_preferred_oldsa), 0, "");
332 #define __LIST_CHAINED(elm) \
333 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
334 #define LIST_INSERT_TAIL(head, elm, type, field) \
336 struct type *curelm = LIST_FIRST(head); \
337 if (curelm == NULL) {\
338 LIST_INSERT_HEAD(head, elm, field); \
340 while (LIST_NEXT(curelm, field)) \
341 curelm = LIST_NEXT(curelm, field);\
342 LIST_INSERT_AFTER(curelm, elm, field);\
346 #define KEY_CHKSASTATE(head, sav, name) \
348 if ((head) != (sav)) { \
349 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
350 (name), (head), (sav))); \
355 #define KEY_CHKSPDIR(head, sp, name) \
357 if ((head) != (sp)) { \
358 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
359 "anyway continue.\n", \
360 (name), (head), (sp))); \
364 MALLOC_DEFINE(M_IPSEC_SA, "secasvar", "ipsec security association");
365 MALLOC_DEFINE(M_IPSEC_SAH, "sahead", "ipsec sa head");
366 MALLOC_DEFINE(M_IPSEC_SP, "ipsecpolicy", "ipsec security policy");
367 MALLOC_DEFINE(M_IPSEC_SR, "ipsecrequest", "ipsec security request");
368 MALLOC_DEFINE(M_IPSEC_MISC, "ipsec-misc", "ipsec miscellaneous");
369 MALLOC_DEFINE(M_IPSEC_SAQ, "ipsec-saq", "ipsec sa acquire");
370 MALLOC_DEFINE(M_IPSEC_SAR, "ipsec-reg", "ipsec sa acquire");
373 * set parameters into secpolicyindex buffer.
374 * Must allocate secpolicyindex buffer passed to this function.
376 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
378 bzero((idx), sizeof(struct secpolicyindex)); \
379 (idx)->dir = (_dir); \
380 (idx)->prefs = (ps); \
381 (idx)->prefd = (pd); \
382 (idx)->ul_proto = (ulp); \
383 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
384 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
388 * set parameters into secasindex buffer.
389 * Must allocate secasindex buffer before calling this function.
391 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
393 bzero((idx), sizeof(struct secasindex)); \
394 (idx)->proto = (p); \
396 (idx)->reqid = (r); \
397 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
398 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
403 u_long getspi_count; /* the avarage of count to try to get new SPI */
407 struct sadb_msg *msg;
408 struct sadb_ext *ext[SADB_EXT_MAX + 1];
409 int extoff[SADB_EXT_MAX + 1];
410 int extlen[SADB_EXT_MAX + 1];
414 static struct callout key_timer;
417 static struct secasvar *key_allocsa_policy __P((const struct secasindex *));
418 static void key_freesp_so __P((struct secpolicy **));
419 static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int));
420 static void key_delsp __P((struct secpolicy *));
421 static struct secpolicy *key_getsp __P((struct secpolicyindex *));
422 static void _key_delsp(struct secpolicy *sp);
423 static struct secpolicy *key_getspbyid __P((u_int32_t));
424 static u_int32_t key_newreqid __P((void));
425 static struct mbuf *key_gather_mbuf __P((struct mbuf *,
426 const struct sadb_msghdr *, int, int, ...));
427 static int key_spdadd __P((struct socket *, struct mbuf *,
428 const struct sadb_msghdr *));
429 static u_int32_t key_getnewspid __P((void));
430 static int key_spddelete __P((struct socket *, struct mbuf *,
431 const struct sadb_msghdr *));
432 static int key_spddelete2 __P((struct socket *, struct mbuf *,
433 const struct sadb_msghdr *));
434 static int key_spdget __P((struct socket *, struct mbuf *,
435 const struct sadb_msghdr *));
436 static int key_spdflush __P((struct socket *, struct mbuf *,
437 const struct sadb_msghdr *));
438 static int key_spddump __P((struct socket *, struct mbuf *,
439 const struct sadb_msghdr *));
440 static struct mbuf *key_setdumpsp __P((struct secpolicy *,
441 u_int8_t, u_int32_t, u_int32_t));
442 static u_int key_getspreqmsglen __P((struct secpolicy *));
443 static int key_spdexpire __P((struct secpolicy *));
444 static struct secashead *key_newsah __P((struct secasindex *));
445 static void key_delsah __P((struct secashead *));
446 static struct secasvar *key_newsav __P((struct mbuf *,
447 const struct sadb_msghdr *, struct secashead *, int *,
449 #define KEY_NEWSAV(m, sadb, sah, e) \
450 key_newsav(m, sadb, sah, e, __FILE__, __LINE__)
451 static void key_delsav __P((struct secasvar *));
452 static struct secashead *key_getsah __P((struct secasindex *));
453 static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t));
454 static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t));
455 static int key_setsaval __P((struct secasvar *, struct mbuf *,
456 const struct sadb_msghdr *));
457 static int key_mature __P((struct secasvar *));
458 static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t,
459 u_int8_t, u_int32_t, u_int32_t));
460 static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t,
461 u_int32_t, pid_t, u_int16_t));
462 static struct mbuf *key_setsadbsa __P((struct secasvar *));
463 static struct mbuf *key_setsadbaddr __P((u_int16_t,
464 const struct sockaddr *, u_int8_t, u_int16_t));
466 static struct mbuf *key_setsadbxport(u_int16_t, u_int16_t);
467 static struct mbuf *key_setsadbxtype(u_int16_t);
469 static void key_porttosaddr(struct sockaddr *, u_int16_t);
470 #define KEY_PORTTOSADDR(saddr, port) \
471 key_porttosaddr((struct sockaddr *)(saddr), (port))
472 static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t));
473 static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t,
475 static struct seckey *key_dup_keymsg(const struct sadb_key *, u_int,
476 struct malloc_type *);
477 static struct seclifetime *key_dup_lifemsg(const struct sadb_lifetime *src,
478 struct malloc_type *type);
480 static int key_ismyaddr6 __P((struct sockaddr_in6 *));
483 /* flags for key_cmpsaidx() */
484 #define CMP_HEAD 1 /* protocol, addresses. */
485 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
486 #define CMP_REQID 3 /* additionally HEAD, reaid. */
487 #define CMP_EXACTLY 4 /* all elements. */
488 static int key_cmpsaidx
489 __P((const struct secasindex *, const struct secasindex *, int));
491 static int key_cmpspidx_exactly
492 __P((struct secpolicyindex *, struct secpolicyindex *));
493 static int key_cmpspidx_withmask
494 __P((struct secpolicyindex *, struct secpolicyindex *));
495 static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int));
496 static int key_bbcmp __P((const void *, const void *, u_int));
497 static u_int16_t key_satype2proto __P((u_int8_t));
498 static u_int8_t key_proto2satype __P((u_int16_t));
500 static int key_getspi __P((struct socket *, struct mbuf *,
501 const struct sadb_msghdr *));
502 static u_int32_t key_do_getnewspi __P((struct sadb_spirange *,
503 struct secasindex *));
504 static int key_update __P((struct socket *, struct mbuf *,
505 const struct sadb_msghdr *));
506 #ifdef IPSEC_DOSEQCHECK
507 static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t));
509 static int key_add __P((struct socket *, struct mbuf *,
510 const struct sadb_msghdr *));
511 static int key_setident __P((struct secashead *, struct mbuf *,
512 const struct sadb_msghdr *));
513 static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *,
514 const struct sadb_msghdr *));
515 static int key_delete __P((struct socket *, struct mbuf *,
516 const struct sadb_msghdr *));
517 static int key_get __P((struct socket *, struct mbuf *,
518 const struct sadb_msghdr *));
520 static void key_getcomb_setlifetime __P((struct sadb_comb *));
521 static struct mbuf *key_getcomb_esp __P((void));
522 static struct mbuf *key_getcomb_ah __P((void));
523 static struct mbuf *key_getcomb_ipcomp __P((void));
524 static struct mbuf *key_getprop __P((const struct secasindex *));
526 static int key_acquire __P((const struct secasindex *, struct secpolicy *));
527 static struct secacq *key_newacq __P((const struct secasindex *));
528 static struct secacq *key_getacq __P((const struct secasindex *));
529 static struct secacq *key_getacqbyseq __P((u_int32_t));
530 static struct secspacq *key_newspacq __P((struct secpolicyindex *));
531 static struct secspacq *key_getspacq __P((struct secpolicyindex *));
532 static int key_acquire2 __P((struct socket *, struct mbuf *,
533 const struct sadb_msghdr *));
534 static int key_register __P((struct socket *, struct mbuf *,
535 const struct sadb_msghdr *));
536 static int key_expire __P((struct secasvar *));
537 static int key_flush __P((struct socket *, struct mbuf *,
538 const struct sadb_msghdr *));
539 static int key_dump __P((struct socket *, struct mbuf *,
540 const struct sadb_msghdr *));
541 static int key_promisc __P((struct socket *, struct mbuf *,
542 const struct sadb_msghdr *));
543 static int key_senderror __P((struct socket *, struct mbuf *, int));
544 static int key_validate_ext __P((const struct sadb_ext *, int));
545 static int key_align __P((struct mbuf *, struct sadb_msghdr *));
546 static struct mbuf *key_setlifetime(struct seclifetime *src,
548 static struct mbuf *key_setkey(struct seckey *src, u_int16_t exttype);
551 static const char *key_getfqdn __P((void));
552 static const char *key_getuserfqdn __P((void));
554 static void key_sa_chgstate __P((struct secasvar *, u_int8_t));
557 sa_initref(struct secasvar *sav)
560 refcount_init(&sav->refcnt, 1);
563 sa_addref(struct secasvar *sav)
566 refcount_acquire(&sav->refcnt);
567 IPSEC_ASSERT(sav->refcnt != 0, ("SA refcnt overflow"));
570 sa_delref(struct secasvar *sav)
573 IPSEC_ASSERT(sav->refcnt > 0, ("SA refcnt underflow"));
574 return (refcount_release(&sav->refcnt));
577 #define SP_ADDREF(p) do { \
579 IPSEC_ASSERT((p)->refcnt != 0, ("SP refcnt overflow")); \
581 #define SP_DELREF(p) do { \
582 IPSEC_ASSERT((p)->refcnt > 0, ("SP refcnt underflow")); \
588 * Update the refcnt while holding the SPTREE lock.
591 key_addref(struct secpolicy *sp)
599 * Return 0 when there are known to be no SP's for the specified
600 * direction. Otherwise return 1. This is used by IPsec code
601 * to optimize performance.
604 key_havesp(u_int dir)
607 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
608 LIST_FIRST(&V_sptree[dir]) != NULL : 1);
611 /* %%% IPsec policy management */
613 * allocating a SP for OUTBOUND or INBOUND packet.
614 * Must call key_freesp() later.
615 * OUT: NULL: not found
616 * others: found and return the pointer.
619 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag)
621 struct secpolicy *sp;
623 IPSEC_ASSERT(spidx != NULL, ("null spidx"));
624 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
625 ("invalid direction %u", dir));
627 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
628 printf("DP %s from %s:%u\n", __func__, where, tag));
631 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
632 printf("*** objects\n");
633 kdebug_secpolicyindex(spidx));
636 LIST_FOREACH(sp, &V_sptree[dir], chain) {
637 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
638 printf("*** in SPD\n");
639 kdebug_secpolicyindex(&sp->spidx));
641 if (sp->state == IPSEC_SPSTATE_DEAD)
643 if (key_cmpspidx_withmask(&sp->spidx, spidx))
650 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__);
652 /* found a SPD entry */
653 sp->lastused = time_second;
658 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
659 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__,
660 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
665 * allocating a SP for OUTBOUND or INBOUND packet.
666 * Must call key_freesp() later.
667 * OUT: NULL: not found
668 * others: found and return the pointer.
671 key_allocsp2(u_int32_t spi,
672 union sockaddr_union *dst,
675 const char* where, int tag)
677 struct secpolicy *sp;
679 IPSEC_ASSERT(dst != NULL, ("null dst"));
680 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
681 ("invalid direction %u", dir));
683 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
684 printf("DP %s from %s:%u\n", __func__, where, tag));
687 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
688 printf("*** objects\n");
689 printf("spi %u proto %u dir %u\n", spi, proto, dir);
690 kdebug_sockaddr(&dst->sa));
693 LIST_FOREACH(sp, &V_sptree[dir], chain) {
694 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
695 printf("*** in SPD\n");
696 kdebug_secpolicyindex(&sp->spidx));
698 if (sp->state == IPSEC_SPSTATE_DEAD)
700 /* compare simple values, then dst address */
701 if (sp->spidx.ul_proto != proto)
703 /* NB: spi's must exist and match */
704 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi)
706 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0)
713 KEY_CHKSPDIR(sp->spidx.dir, dir, __func__);
715 /* found a SPD entry */
716 sp->lastused = time_second;
721 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
722 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__,
723 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
729 * return a policy that matches this particular inbound packet.
733 key_gettunnel(const struct sockaddr *osrc,
734 const struct sockaddr *odst,
735 const struct sockaddr *isrc,
736 const struct sockaddr *idst,
737 const char* where, int tag)
739 struct secpolicy *sp;
740 const int dir = IPSEC_DIR_INBOUND;
741 struct ipsecrequest *r1, *r2, *p;
742 struct secpolicyindex spidx;
744 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
745 printf("DP %s from %s:%u\n", __func__, where, tag));
747 if (isrc->sa_family != idst->sa_family) {
748 ipseclog((LOG_ERR, "%s: protocol family mismatched %d != %d\n.",
749 __func__, isrc->sa_family, idst->sa_family));
755 LIST_FOREACH(sp, &V_sptree[dir], chain) {
756 if (sp->state == IPSEC_SPSTATE_DEAD)
760 for (p = sp->req; p; p = p->next) {
761 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
768 /* here we look at address matches only */
770 if (isrc->sa_len > sizeof(spidx.src) ||
771 idst->sa_len > sizeof(spidx.dst))
773 bcopy(isrc, &spidx.src, isrc->sa_len);
774 bcopy(idst, &spidx.dst, idst->sa_len);
775 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
778 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) ||
779 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0))
783 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) ||
784 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0))
793 sp->lastused = time_second;
798 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
799 printf("DP %s return SP:%p (ID=%u) refcnt %u\n", __func__,
800 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
806 * allocating an SA entry for an *OUTBOUND* packet.
807 * checking each request entries in SP, and acquire an SA if need.
808 * OUT: 0: there are valid requests.
809 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
812 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx)
816 struct secasvar *sav;
818 IPSEC_ASSERT(isr != NULL, ("null isr"));
819 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
820 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
821 saidx->mode == IPSEC_MODE_TUNNEL,
822 ("unexpected policy %u", saidx->mode));
825 * XXX guard against protocol callbacks from the crypto
826 * thread as they reference ipsecrequest.sav which we
827 * temporarily null out below. Need to rethink how we
828 * handle bundled SA's in the callback thread.
830 IPSECREQUEST_LOCK_ASSERT(isr);
832 /* get current level */
833 level = ipsec_get_reqlevel(isr);
836 * We check new SA in the IPsec request because a different
837 * SA may be involved each time this request is checked, either
838 * because new SAs are being configured, or this request is
839 * associated with an unconnected datagram socket, or this request
840 * is associated with a system default policy.
842 * key_allocsa_policy should allocate the oldest SA available.
843 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
845 sav = key_allocsa_policy(saidx);
846 if (sav != isr->sav) {
847 /* SA need to be updated. */
848 if (!IPSECREQUEST_UPGRADE(isr)) {
849 /* Kick everyone off. */
850 IPSECREQUEST_UNLOCK(isr);
851 IPSECREQUEST_WLOCK(isr);
853 if (isr->sav != NULL)
854 KEY_FREESAV(&isr->sav);
856 IPSECREQUEST_DOWNGRADE(isr);
857 } else if (sav != NULL)
860 /* When there is SA. */
861 if (isr->sav != NULL) {
862 if (isr->sav->state != SADB_SASTATE_MATURE &&
863 isr->sav->state != SADB_SASTATE_DYING)
869 error = key_acquire(saidx, isr->sp);
871 /* XXX What should I do ? */
872 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n",
877 if (level != IPSEC_LEVEL_REQUIRE) {
878 /* XXX sigh, the interface to this routine is botched */
879 IPSEC_ASSERT(isr->sav == NULL, ("unexpected SA"));
887 * allocating a SA for policy entry from SAD.
888 * NOTE: searching SAD of aliving state.
889 * OUT: NULL: not found.
890 * others: found and return the pointer.
892 static struct secasvar *
893 key_allocsa_policy(const struct secasindex *saidx)
895 #define N(a) _ARRAYLEN(a)
896 struct secashead *sah;
897 struct secasvar *sav;
898 u_int stateidx, arraysize;
899 const u_int *state_valid;
901 state_valid = NULL; /* silence gcc */
902 arraysize = 0; /* silence gcc */
905 LIST_FOREACH(sah, &V_sahtree, chain) {
906 if (sah->state == SADB_SASTATE_DEAD)
908 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID)) {
909 if (V_key_preferred_oldsa) {
910 state_valid = saorder_state_valid_prefer_old;
911 arraysize = N(saorder_state_valid_prefer_old);
913 state_valid = saorder_state_valid_prefer_new;
914 arraysize = N(saorder_state_valid_prefer_new);
923 /* search valid state */
924 for (stateidx = 0; stateidx < arraysize; stateidx++) {
925 sav = key_do_allocsa_policy(sah, state_valid[stateidx]);
935 * searching SAD with direction, protocol, mode and state.
936 * called by key_allocsa_policy().
939 * others : found, pointer to a SA.
941 static struct secasvar *
942 key_do_allocsa_policy(struct secashead *sah, u_int state)
944 struct secasvar *sav, *nextsav, *candidate, *d;
950 for (sav = LIST_FIRST(&sah->savtree[state]);
954 nextsav = LIST_NEXT(sav, chain);
957 KEY_CHKSASTATE(sav->state, state, __func__);
960 if (candidate == NULL) {
965 /* Which SA is the better ? */
967 IPSEC_ASSERT(candidate->lft_c != NULL,
968 ("null candidate lifetime"));
969 IPSEC_ASSERT(sav->lft_c != NULL, ("null sav lifetime"));
971 /* What the best method is to compare ? */
972 if (V_key_preferred_oldsa) {
973 if (candidate->lft_c->addtime >
974 sav->lft_c->addtime) {
981 /* preferred new sa rather than old sa */
982 if (candidate->lft_c->addtime <
983 sav->lft_c->addtime) {
990 * prepared to delete the SA when there is more
991 * suitable candidate and the lifetime of the SA is not
994 if (d->lft_h->addtime != 0) {
995 struct mbuf *m, *result;
998 key_sa_chgstate(d, SADB_SASTATE_DEAD);
1000 IPSEC_ASSERT(d->refcnt > 0, ("bogus ref count"));
1002 satype = key_proto2satype(d->sah->saidx.proto);
1006 m = key_setsadbmsg(SADB_DELETE, 0,
1007 satype, 0, 0, d->refcnt - 1);
1012 /* set sadb_address for saidx's. */
1013 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
1014 &d->sah->saidx.src.sa,
1015 d->sah->saidx.src.sa.sa_len << 3,
1021 /* set sadb_address for saidx's. */
1022 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
1023 &d->sah->saidx.dst.sa,
1024 d->sah->saidx.dst.sa.sa_len << 3,
1030 /* create SA extension */
1031 m = key_setsadbsa(d);
1036 if (result->m_len < sizeof(struct sadb_msg)) {
1037 result = m_pullup(result,
1038 sizeof(struct sadb_msg));
1043 result->m_pkthdr.len = 0;
1044 for (m = result; m; m = m->m_next)
1045 result->m_pkthdr.len += m->m_len;
1046 mtod(result, struct sadb_msg *)->sadb_msg_len =
1047 PFKEY_UNIT64(result->m_pkthdr.len);
1049 if (key_sendup_mbuf(NULL, result,
1050 KEY_SENDUP_REGISTERED))
1057 sa_addref(candidate);
1058 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1059 printf("DP %s cause refcnt++:%d SA:%p\n",
1060 __func__, candidate->refcnt, candidate));
1068 * allocating a usable SA entry for a *INBOUND* packet.
1069 * Must call key_freesav() later.
1070 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
1071 * NULL: not found, or error occured.
1073 * In the comparison, no source address is used--for RFC2401 conformance.
1074 * To quote, from section 4.1:
1075 * A security association is uniquely identified by a triple consisting
1076 * of a Security Parameter Index (SPI), an IP Destination Address, and a
1077 * security protocol (AH or ESP) identifier.
1078 * Note that, however, we do need to keep source address in IPsec SA.
1079 * IKE specification and PF_KEY specification do assume that we
1080 * keep source address in IPsec SA. We see a tricky situation here.
1084 union sockaddr_union *dst,
1087 const char* where, int tag)
1089 struct secashead *sah;
1090 struct secasvar *sav;
1091 u_int stateidx, arraysize, state;
1092 const u_int *saorder_state_valid;
1097 IPSEC_ASSERT(dst != NULL, ("null dst address"));
1099 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1100 printf("DP %s from %s:%u\n", __func__, where, tag));
1103 natt_chkport = (dst->sa.sa_family == AF_INET &&
1104 dst->sa.sa_len == sizeof(struct sockaddr_in) &&
1105 dst->sin.sin_port != 0);
1110 * XXX: to be checked internal IP header somewhere. Also when
1111 * IPsec tunnel packet is received. But ESP tunnel mode is
1112 * encrypted so we can't check internal IP header.
1115 if (V_key_preferred_oldsa) {
1116 saorder_state_valid = saorder_state_valid_prefer_old;
1117 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
1119 saorder_state_valid = saorder_state_valid_prefer_new;
1120 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
1122 LIST_FOREACH(sah, &V_sahtree, chain) {
1125 /* search valid state */
1126 for (stateidx = 0; stateidx < arraysize; stateidx++) {
1127 state = saorder_state_valid[stateidx];
1128 LIST_FOREACH(sav, &sah->savtree[state], chain) {
1130 KEY_CHKSASTATE(sav->state, state, __func__);
1131 /* do not return entries w/ unusable state */
1132 if (sav->state != SADB_SASTATE_MATURE &&
1133 sav->state != SADB_SASTATE_DYING)
1135 if (proto != sav->sah->saidx.proto)
1137 if (spi != sav->spi)
1142 * Really only check ports when this is a NAT-T
1143 * SA. Otherwise other lookups providing ports
1146 if (sav->natt_type && natt_chkport)
1149 #if 0 /* don't check src */
1150 /* check src address */
1151 if (key_sockaddrcmp(&src->sa,
1152 &sav->sah->saidx.src.sa, checkport) != 0)
1155 /* check dst address */
1156 if (key_sockaddrcmp(&dst->sa,
1157 &sav->sah->saidx.dst.sa, checkport) != 0)
1168 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1169 printf("DP %s return SA:%p; refcnt %u\n", __func__,
1170 sav, sav ? sav->refcnt : 0));
1175 * Must be called after calling key_allocsp().
1176 * For both the packet without socket and key_freeso().
1179 _key_freesp(struct secpolicy **spp, const char* where, int tag)
1181 struct secpolicy *sp = *spp;
1183 IPSEC_ASSERT(sp != NULL, ("null sp"));
1188 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1189 printf("DP %s SP:%p (ID=%u) from %s:%u; refcnt now %u\n",
1190 __func__, sp, sp->id, where, tag, sp->refcnt));
1192 if (sp->refcnt == 0) {
1200 * Must be called after calling key_allocsp().
1201 * For the packet with socket.
1204 key_freeso(struct socket *so)
1206 IPSEC_ASSERT(so != NULL, ("null so"));
1208 switch (so->so_proto->pr_domain->dom_family) {
1209 #if defined(INET) || defined(INET6)
1217 struct inpcb *pcb = sotoinpcb(so);
1219 /* Does it have a PCB ? */
1222 key_freesp_so(&pcb->inp_sp->sp_in);
1223 key_freesp_so(&pcb->inp_sp->sp_out);
1226 #endif /* INET || INET6 */
1228 ipseclog((LOG_DEBUG, "%s: unknown address family=%d.\n",
1229 __func__, so->so_proto->pr_domain->dom_family));
1235 key_freesp_so(struct secpolicy **sp)
1237 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("null sp"));
1239 if ((*sp)->policy == IPSEC_POLICY_ENTRUST ||
1240 (*sp)->policy == IPSEC_POLICY_BYPASS)
1243 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC,
1244 ("invalid policy %u", (*sp)->policy));
1249 key_addrefsa(struct secasvar *sav, const char* where, int tag)
1252 IPSEC_ASSERT(sav != NULL, ("null sav"));
1253 IPSEC_ASSERT(sav->refcnt > 0, ("refcount must exist"));
1259 * Must be called after calling key_allocsa().
1260 * This function is called by key_freesp() to free some SA allocated
1264 key_freesav(struct secasvar **psav, const char* where, int tag)
1266 struct secasvar *sav = *psav;
1268 IPSEC_ASSERT(sav != NULL, ("null sav"));
1270 if (sa_delref(sav)) {
1271 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1272 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n",
1273 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt));
1277 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1278 printf("DP %s SA:%p (SPI %u) from %s:%u; refcnt now %u\n",
1279 __func__, sav, ntohl(sav->spi), where, tag, sav->refcnt));
1283 /* %%% SPD management */
1285 * free security policy entry.
1288 key_delsp(struct secpolicy *sp)
1290 struct ipsecrequest *isr, *nextisr;
1292 IPSEC_ASSERT(sp != NULL, ("null sp"));
1293 SPTREE_LOCK_ASSERT();
1295 sp->state = IPSEC_SPSTATE_DEAD;
1297 IPSEC_ASSERT(sp->refcnt == 0,
1298 ("SP with references deleted (refcnt %u)", sp->refcnt));
1300 /* remove from SP index */
1301 if (__LIST_CHAINED(sp))
1302 LIST_REMOVE(sp, chain);
1304 for (isr = sp->req; isr != NULL; isr = nextisr) {
1305 if (isr->sav != NULL) {
1306 KEY_FREESAV(&isr->sav);
1310 nextisr = isr->next;
1318 * OUT: NULL : not found
1319 * others : found, pointer to a SP.
1321 static struct secpolicy *
1322 key_getsp(struct secpolicyindex *spidx)
1324 struct secpolicy *sp;
1326 IPSEC_ASSERT(spidx != NULL, ("null spidx"));
1329 LIST_FOREACH(sp, &V_sptree[spidx->dir], chain) {
1330 if (sp->state == IPSEC_SPSTATE_DEAD)
1332 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1344 * OUT: NULL : not found
1345 * others : found, pointer to a SP.
1347 static struct secpolicy *
1348 key_getspbyid(u_int32_t id)
1350 struct secpolicy *sp;
1353 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_INBOUND], chain) {
1354 if (sp->state == IPSEC_SPSTATE_DEAD)
1362 LIST_FOREACH(sp, &V_sptree[IPSEC_DIR_OUTBOUND], chain) {
1363 if (sp->state == IPSEC_SPSTATE_DEAD)
1377 key_newsp(const char* where, int tag)
1379 struct secpolicy *newsp = NULL;
1381 newsp = (struct secpolicy *)
1382 malloc(sizeof(struct secpolicy), M_IPSEC_SP, M_NOWAIT|M_ZERO);
1384 SECPOLICY_LOCK_INIT(newsp);
1389 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1390 printf("DP %s from %s:%u return SP:%p\n", __func__,
1391 where, tag, newsp));
1396 _key_delsp(struct secpolicy *sp)
1398 SECPOLICY_LOCK_DESTROY(sp);
1399 free(sp, M_IPSEC_SP);
1403 * create secpolicy structure from sadb_x_policy structure.
1404 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1405 * so must be set properly later.
1408 key_msg2sp(xpl0, len, error)
1409 struct sadb_x_policy *xpl0;
1413 struct secpolicy *newsp;
1415 IPSEC_ASSERT(xpl0 != NULL, ("null xpl0"));
1416 IPSEC_ASSERT(len >= sizeof(*xpl0), ("policy too short: %zu", len));
1418 if (len != PFKEY_EXTLEN(xpl0)) {
1419 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n", __func__));
1424 if ((newsp = KEY_NEWSP()) == NULL) {
1429 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1430 newsp->policy = xpl0->sadb_x_policy_type;
1433 switch (xpl0->sadb_x_policy_type) {
1434 case IPSEC_POLICY_DISCARD:
1435 case IPSEC_POLICY_NONE:
1436 case IPSEC_POLICY_ENTRUST:
1437 case IPSEC_POLICY_BYPASS:
1441 case IPSEC_POLICY_IPSEC:
1444 struct sadb_x_ipsecrequest *xisr;
1445 struct ipsecrequest **p_isr = &newsp->req;
1447 /* validity check */
1448 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1449 ipseclog((LOG_DEBUG, "%s: Invalid msg length.\n",
1456 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1457 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1461 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1462 ipseclog((LOG_DEBUG, "%s: invalid ipsecrequest "
1463 "length.\n", __func__));
1469 /* allocate request buffer */
1470 /* NB: data structure is zero'd */
1471 *p_isr = ipsec_newisr();
1472 if ((*p_isr) == NULL) {
1473 ipseclog((LOG_DEBUG,
1474 "%s: No more memory.\n", __func__));
1481 switch (xisr->sadb_x_ipsecrequest_proto) {
1484 case IPPROTO_IPCOMP:
1487 ipseclog((LOG_DEBUG,
1488 "%s: invalid proto type=%u\n", __func__,
1489 xisr->sadb_x_ipsecrequest_proto));
1491 *error = EPROTONOSUPPORT;
1494 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1496 switch (xisr->sadb_x_ipsecrequest_mode) {
1497 case IPSEC_MODE_TRANSPORT:
1498 case IPSEC_MODE_TUNNEL:
1500 case IPSEC_MODE_ANY:
1502 ipseclog((LOG_DEBUG,
1503 "%s: invalid mode=%u\n", __func__,
1504 xisr->sadb_x_ipsecrequest_mode));
1509 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1511 switch (xisr->sadb_x_ipsecrequest_level) {
1512 case IPSEC_LEVEL_DEFAULT:
1513 case IPSEC_LEVEL_USE:
1514 case IPSEC_LEVEL_REQUIRE:
1516 case IPSEC_LEVEL_UNIQUE:
1517 /* validity check */
1519 * If range violation of reqid, kernel will
1520 * update it, don't refuse it.
1522 if (xisr->sadb_x_ipsecrequest_reqid
1523 > IPSEC_MANUAL_REQID_MAX) {
1524 ipseclog((LOG_DEBUG,
1525 "%s: reqid=%d range "
1526 "violation, updated by kernel.\n",
1528 xisr->sadb_x_ipsecrequest_reqid));
1529 xisr->sadb_x_ipsecrequest_reqid = 0;
1532 /* allocate new reqid id if reqid is zero. */
1533 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1535 if ((reqid = key_newreqid()) == 0) {
1540 (*p_isr)->saidx.reqid = reqid;
1541 xisr->sadb_x_ipsecrequest_reqid = reqid;
1543 /* set it for manual keying. */
1544 (*p_isr)->saidx.reqid =
1545 xisr->sadb_x_ipsecrequest_reqid;
1550 ipseclog((LOG_DEBUG, "%s: invalid level=%u\n",
1552 xisr->sadb_x_ipsecrequest_level));
1557 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1559 /* set IP addresses if there */
1560 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1561 struct sockaddr *paddr;
1563 paddr = (struct sockaddr *)(xisr + 1);
1565 /* validity check */
1567 > sizeof((*p_isr)->saidx.src)) {
1568 ipseclog((LOG_DEBUG, "%s: invalid "
1569 "request address length.\n",
1575 bcopy(paddr, &(*p_isr)->saidx.src,
1578 paddr = (struct sockaddr *)((caddr_t)paddr
1581 /* validity check */
1583 > sizeof((*p_isr)->saidx.dst)) {
1584 ipseclog((LOG_DEBUG, "%s: invalid "
1585 "request address length.\n",
1591 bcopy(paddr, &(*p_isr)->saidx.dst,
1595 (*p_isr)->sp = newsp;
1597 /* initialization for the next. */
1598 p_isr = &(*p_isr)->next;
1599 tlen -= xisr->sadb_x_ipsecrequest_len;
1601 /* validity check */
1603 ipseclog((LOG_DEBUG, "%s: becoming tlen < 0.\n",
1610 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1611 + xisr->sadb_x_ipsecrequest_len);
1616 ipseclog((LOG_DEBUG, "%s: invalid policy type.\n", __func__));
1629 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1631 auto_reqid = (auto_reqid == ~0
1632 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1634 /* XXX should be unique check */
1640 * copy secpolicy struct to sadb_x_policy structure indicated.
1644 struct secpolicy *sp;
1646 struct sadb_x_policy *xpl;
1651 IPSEC_ASSERT(sp != NULL, ("null policy"));
1653 tlen = key_getspreqmsglen(sp);
1655 m = m_get2(tlen, M_NOWAIT, MT_DATA, 0);
1660 xpl = mtod(m, struct sadb_x_policy *);
1663 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1664 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1665 xpl->sadb_x_policy_type = sp->policy;
1666 xpl->sadb_x_policy_dir = sp->spidx.dir;
1667 xpl->sadb_x_policy_id = sp->id;
1668 p = (caddr_t)xpl + sizeof(*xpl);
1670 /* if is the policy for ipsec ? */
1671 if (sp->policy == IPSEC_POLICY_IPSEC) {
1672 struct sadb_x_ipsecrequest *xisr;
1673 struct ipsecrequest *isr;
1675 for (isr = sp->req; isr != NULL; isr = isr->next) {
1677 xisr = (struct sadb_x_ipsecrequest *)p;
1679 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1680 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1681 xisr->sadb_x_ipsecrequest_level = isr->level;
1682 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1685 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len);
1686 p += isr->saidx.src.sa.sa_len;
1687 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len);
1688 p += isr->saidx.src.sa.sa_len;
1690 xisr->sadb_x_ipsecrequest_len =
1691 PFKEY_ALIGN8(sizeof(*xisr)
1692 + isr->saidx.src.sa.sa_len
1693 + isr->saidx.dst.sa.sa_len);
1700 /* m will not be freed nor modified */
1701 static struct mbuf *
1703 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1704 int ndeep, int nitem, ...)
1706 key_gather_mbuf(m, mhp, ndeep, nitem, va_alist)
1708 const struct sadb_msghdr *mhp;
1717 struct mbuf *result = NULL, *n;
1720 IPSEC_ASSERT(m != NULL, ("null mbuf"));
1721 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
1723 va_start(ap, nitem);
1724 for (i = 0; i < nitem; i++) {
1725 idx = va_arg(ap, int);
1726 if (idx < 0 || idx > SADB_EXT_MAX)
1728 /* don't attempt to pull empty extension */
1729 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1731 if (idx != SADB_EXT_RESERVED &&
1732 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1735 if (idx == SADB_EXT_RESERVED) {
1736 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1738 IPSEC_ASSERT(len <= MHLEN, ("header too big %u", len));
1740 MGETHDR(n, M_NOWAIT, MT_DATA);
1745 m_copydata(m, 0, sizeof(struct sadb_msg),
1747 } else if (i < ndeep) {
1748 len = mhp->extlen[idx];
1749 n = m_get2(len, M_NOWAIT, MT_DATA, 0);
1754 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1757 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1770 if ((result->m_flags & M_PKTHDR) != 0) {
1771 result->m_pkthdr.len = 0;
1772 for (n = result; n; n = n->m_next)
1773 result->m_pkthdr.len += n->m_len;
1785 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1786 * add an entry to SP database, when received
1787 * <base, address(SD), (lifetime(H),) policy>
1789 * Adding to SP database,
1791 * <base, address(SD), (lifetime(H),) policy>
1792 * to the socket which was send.
1794 * SPDADD set a unique policy entry.
1795 * SPDSETIDX like SPDADD without a part of policy requests.
1796 * SPDUPDATE replace a unique policy entry.
1798 * m will always be freed.
1801 key_spdadd(so, m, mhp)
1804 const struct sadb_msghdr *mhp;
1806 struct sadb_address *src0, *dst0;
1807 struct sadb_x_policy *xpl0, *xpl;
1808 struct sadb_lifetime *lft = NULL;
1809 struct secpolicyindex spidx;
1810 struct secpolicy *newsp;
1813 IPSEC_ASSERT(so != NULL, ("null socket"));
1814 IPSEC_ASSERT(m != NULL, ("null mbuf"));
1815 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
1816 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
1818 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1819 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1820 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1821 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1822 return key_senderror(so, m, EINVAL);
1824 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1825 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1826 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1827 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
1829 return key_senderror(so, m, EINVAL);
1831 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1832 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1833 < sizeof(struct sadb_lifetime)) {
1834 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
1836 return key_senderror(so, m, EINVAL);
1838 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1841 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1842 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1843 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1846 * Note: do not parse SADB_X_EXT_NAT_T_* here:
1847 * we are processing traffic endpoints.
1851 /* XXX boundary check against sa_len */
1852 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1855 src0->sadb_address_prefixlen,
1856 dst0->sadb_address_prefixlen,
1857 src0->sadb_address_proto,
1860 /* checking the direciton. */
1861 switch (xpl0->sadb_x_policy_dir) {
1862 case IPSEC_DIR_INBOUND:
1863 case IPSEC_DIR_OUTBOUND:
1866 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__));
1867 mhp->msg->sadb_msg_errno = EINVAL;
1872 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1873 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1874 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1875 ipseclog((LOG_DEBUG, "%s: Invalid policy type.\n", __func__));
1876 return key_senderror(so, m, EINVAL);
1879 /* policy requests are mandatory when action is ipsec. */
1880 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1881 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1882 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1883 ipseclog((LOG_DEBUG, "%s: some policy requests part required\n",
1885 return key_senderror(so, m, EINVAL);
1889 * checking there is SP already or not.
1890 * SPDUPDATE doesn't depend on whether there is a SP or not.
1891 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1894 newsp = key_getsp(&spidx);
1895 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1898 newsp->state = IPSEC_SPSTATE_DEAD;
1903 if (newsp != NULL) {
1905 ipseclog((LOG_DEBUG, "%s: a SP entry exists already.\n",
1907 return key_senderror(so, m, EEXIST);
1911 /* allocation new SP entry */
1912 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1913 return key_senderror(so, m, error);
1916 if ((newsp->id = key_getnewspid()) == 0) {
1918 return key_senderror(so, m, ENOBUFS);
1921 /* XXX boundary check against sa_len */
1922 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1925 src0->sadb_address_prefixlen,
1926 dst0->sadb_address_prefixlen,
1927 src0->sadb_address_proto,
1930 /* sanity check on addr pair */
1931 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1932 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1934 return key_senderror(so, m, EINVAL);
1936 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1937 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1939 return key_senderror(so, m, EINVAL);
1942 if (newsp->req && newsp->req->saidx.src.sa.sa_family && newsp->req->saidx.dst.sa.sa_family) {
1943 if (newsp->req->saidx.src.sa.sa_family != newsp->req->saidx.dst.sa.sa_family) {
1945 return key_senderror(so, m, EINVAL);
1950 newsp->created = time_second;
1951 newsp->lastused = newsp->created;
1952 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1953 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1955 newsp->refcnt = 1; /* do not reclaim until I say I do */
1956 newsp->state = IPSEC_SPSTATE_ALIVE;
1957 LIST_INSERT_TAIL(&V_sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1959 /* delete the entry in spacqtree */
1960 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1961 struct secspacq *spacq = key_getspacq(&spidx);
1962 if (spacq != NULL) {
1963 /* reset counter in order to deletion by timehandler. */
1964 spacq->created = time_second;
1971 struct mbuf *n, *mpolicy;
1972 struct sadb_msg *newmsg;
1976 * Note: do not send SADB_X_EXT_NAT_T_* here:
1977 * we are sending traffic endpoints.
1980 /* create new sadb_msg to reply. */
1982 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1983 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1984 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1986 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1988 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1991 return key_senderror(so, m, ENOBUFS);
1993 if (n->m_len < sizeof(*newmsg)) {
1994 n = m_pullup(n, sizeof(*newmsg));
1996 return key_senderror(so, m, ENOBUFS);
1998 newmsg = mtod(n, struct sadb_msg *);
1999 newmsg->sadb_msg_errno = 0;
2000 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2003 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
2004 sizeof(*xpl), &off);
2005 if (mpolicy == NULL) {
2006 /* n is already freed */
2007 return key_senderror(so, m, ENOBUFS);
2009 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
2010 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
2012 return key_senderror(so, m, EINVAL);
2014 xpl->sadb_x_policy_id = newsp->id;
2017 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2022 * get new policy id.
2030 u_int32_t newid = 0;
2031 int count = V_key_spi_trycnt; /* XXX */
2032 struct secpolicy *sp;
2034 /* when requesting to allocate spi ranged */
2036 newid = (V_policy_id = (V_policy_id == ~0 ? 1 : V_policy_id + 1));
2038 if ((sp = key_getspbyid(newid)) == NULL)
2044 if (count == 0 || newid == 0) {
2045 ipseclog((LOG_DEBUG, "%s: to allocate policy id is failed.\n",
2054 * SADB_SPDDELETE processing
2056 * <base, address(SD), policy(*)>
2057 * from the user(?), and set SADB_SASTATE_DEAD,
2059 * <base, address(SD), policy(*)>
2061 * policy(*) including direction of policy.
2063 * m will always be freed.
2066 key_spddelete(so, m, mhp)
2069 const struct sadb_msghdr *mhp;
2071 struct sadb_address *src0, *dst0;
2072 struct sadb_x_policy *xpl0;
2073 struct secpolicyindex spidx;
2074 struct secpolicy *sp;
2076 IPSEC_ASSERT(so != NULL, ("null so"));
2077 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2078 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2079 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2081 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
2082 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
2083 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
2084 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2086 return key_senderror(so, m, EINVAL);
2088 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
2089 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
2090 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2091 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2093 return key_senderror(so, m, EINVAL);
2096 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
2097 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
2098 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
2101 * Note: do not parse SADB_X_EXT_NAT_T_* here:
2102 * we are processing traffic endpoints.
2106 /* XXX boundary check against sa_len */
2107 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2110 src0->sadb_address_prefixlen,
2111 dst0->sadb_address_prefixlen,
2112 src0->sadb_address_proto,
2115 /* checking the direciton. */
2116 switch (xpl0->sadb_x_policy_dir) {
2117 case IPSEC_DIR_INBOUND:
2118 case IPSEC_DIR_OUTBOUND:
2121 ipseclog((LOG_DEBUG, "%s: Invalid SP direction.\n", __func__));
2122 return key_senderror(so, m, EINVAL);
2125 /* Is there SP in SPD ? */
2126 if ((sp = key_getsp(&spidx)) == NULL) {
2127 ipseclog((LOG_DEBUG, "%s: no SP found.\n", __func__));
2128 return key_senderror(so, m, EINVAL);
2131 /* save policy id to buffer to be returned. */
2132 xpl0->sadb_x_policy_id = sp->id;
2135 sp->state = IPSEC_SPSTATE_DEAD;
2141 struct sadb_msg *newmsg;
2144 * Note: do not send SADB_X_EXT_NAT_T_* here:
2145 * we are sending traffic endpoints.
2148 /* create new sadb_msg to reply. */
2149 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2150 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2152 return key_senderror(so, m, ENOBUFS);
2154 newmsg = mtod(n, struct sadb_msg *);
2155 newmsg->sadb_msg_errno = 0;
2156 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2159 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2164 * SADB_SPDDELETE2 processing
2167 * from the user(?), and set SADB_SASTATE_DEAD,
2171 * policy(*) including direction of policy.
2173 * m will always be freed.
2176 key_spddelete2(so, m, mhp)
2179 const struct sadb_msghdr *mhp;
2182 struct secpolicy *sp;
2184 IPSEC_ASSERT(so != NULL, ("null socket"));
2185 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2186 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2187 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2189 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2190 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2191 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n", __func__));
2192 return key_senderror(so, m, EINVAL);
2195 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2197 /* Is there SP in SPD ? */
2198 if ((sp = key_getspbyid(id)) == NULL) {
2199 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id));
2200 return key_senderror(so, m, EINVAL);
2204 sp->state = IPSEC_SPSTATE_DEAD;
2209 struct mbuf *n, *nn;
2210 struct sadb_msg *newmsg;
2213 /* create new sadb_msg to reply. */
2214 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2216 MGETHDR(n, M_NOWAIT, MT_DATA);
2217 if (n && len > MHLEN) {
2218 MCLGET(n, M_NOWAIT);
2219 if ((n->m_flags & M_EXT) == 0) {
2225 return key_senderror(so, m, ENOBUFS);
2231 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2232 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2234 IPSEC_ASSERT(off == len, ("length inconsistency (off %u len %u)",
2237 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2238 mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT);
2241 return key_senderror(so, m, ENOBUFS);
2244 n->m_pkthdr.len = 0;
2245 for (nn = n; nn; nn = nn->m_next)
2246 n->m_pkthdr.len += nn->m_len;
2248 newmsg = mtod(n, struct sadb_msg *);
2249 newmsg->sadb_msg_errno = 0;
2250 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2253 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2258 * SADB_X_GET processing
2263 * <base, address(SD), policy>
2265 * policy(*) including direction of policy.
2267 * m will always be freed.
2270 key_spdget(so, m, mhp)
2273 const struct sadb_msghdr *mhp;
2276 struct secpolicy *sp;
2279 IPSEC_ASSERT(so != NULL, ("null socket"));
2280 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2281 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2282 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2284 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2285 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2286 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2288 return key_senderror(so, m, EINVAL);
2291 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2293 /* Is there SP in SPD ? */
2294 if ((sp = key_getspbyid(id)) == NULL) {
2295 ipseclog((LOG_DEBUG, "%s: no SP found id:%u.\n", __func__, id));
2296 return key_senderror(so, m, ENOENT);
2299 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2303 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2305 return key_senderror(so, m, ENOBUFS);
2309 * SADB_X_SPDACQUIRE processing.
2310 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2313 * to KMD, and expect to receive
2314 * <base> with SADB_X_SPDACQUIRE if error occured,
2317 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2318 * policy(*) is without policy requests.
2321 * others: error number
2325 struct secpolicy *sp;
2327 struct mbuf *result = NULL, *m;
2328 struct secspacq *newspacq;
2330 IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
2331 IPSEC_ASSERT(sp->req == NULL, ("policy exists"));
2332 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC,
2333 ("policy not IPSEC %u", sp->policy));
2335 /* Get an entry to check whether sent message or not. */
2336 newspacq = key_getspacq(&sp->spidx);
2337 if (newspacq != NULL) {
2338 if (V_key_blockacq_count < newspacq->count) {
2339 /* reset counter and do send message. */
2340 newspacq->count = 0;
2342 /* increment counter and do nothing. */
2348 /* make new entry for blocking to send SADB_ACQUIRE. */
2349 newspacq = key_newspacq(&sp->spidx);
2350 if (newspacq == NULL)
2354 /* create new sadb_msg to reply. */
2355 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2361 result->m_pkthdr.len = 0;
2362 for (m = result; m; m = m->m_next)
2363 result->m_pkthdr.len += m->m_len;
2365 mtod(result, struct sadb_msg *)->sadb_msg_len =
2366 PFKEY_UNIT64(result->m_pkthdr.len);
2368 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2372 * SADB_SPDFLUSH processing
2375 * from the user, and free all entries in secpctree.
2379 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2381 * m will always be freed.
2384 key_spdflush(so, m, mhp)
2387 const struct sadb_msghdr *mhp;
2389 struct sadb_msg *newmsg;
2390 struct secpolicy *sp;
2393 IPSEC_ASSERT(so != NULL, ("null socket"));
2394 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2395 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2396 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2398 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2399 return key_senderror(so, m, EINVAL);
2401 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2403 LIST_FOREACH(sp, &V_sptree[dir], chain)
2404 sp->state = IPSEC_SPSTATE_DEAD;
2408 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2409 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
2410 return key_senderror(so, m, ENOBUFS);
2416 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2417 newmsg = mtod(m, struct sadb_msg *);
2418 newmsg->sadb_msg_errno = 0;
2419 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2421 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2425 * SADB_SPDDUMP processing
2428 * from the user, and dump all SP leaves
2433 * m will always be freed.
2436 key_spddump(so, m, mhp)
2439 const struct sadb_msghdr *mhp;
2441 struct secpolicy *sp;
2446 IPSEC_ASSERT(so != NULL, ("null socket"));
2447 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2448 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2449 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2451 /* search SPD entry and get buffer size. */
2454 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2455 LIST_FOREACH(sp, &V_sptree[dir], chain) {
2462 return key_senderror(so, m, ENOENT);
2465 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2466 LIST_FOREACH(sp, &V_sptree[dir], chain) {
2468 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2469 mhp->msg->sadb_msg_pid);
2472 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2481 static struct mbuf *
2482 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, u_int32_t pid)
2484 struct mbuf *result = NULL, *m;
2485 struct seclifetime lt;
2487 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2493 * Note: do not send SADB_X_EXT_NAT_T_* here:
2494 * we are sending traffic endpoints.
2496 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2497 &sp->spidx.src.sa, sp->spidx.prefs,
2498 sp->spidx.ul_proto);
2503 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2504 &sp->spidx.dst.sa, sp->spidx.prefd,
2505 sp->spidx.ul_proto);
2516 lt.addtime=sp->created;
2517 lt.usetime= sp->lastused;
2518 m = key_setlifetime(<, SADB_EXT_LIFETIME_CURRENT);
2523 lt.addtime=sp->lifetime;
2524 lt.usetime= sp->validtime;
2525 m = key_setlifetime(<, SADB_EXT_LIFETIME_HARD);
2531 if ((result->m_flags & M_PKTHDR) == 0)
2534 if (result->m_len < sizeof(struct sadb_msg)) {
2535 result = m_pullup(result, sizeof(struct sadb_msg));
2540 result->m_pkthdr.len = 0;
2541 for (m = result; m; m = m->m_next)
2542 result->m_pkthdr.len += m->m_len;
2544 mtod(result, struct sadb_msg *)->sadb_msg_len =
2545 PFKEY_UNIT64(result->m_pkthdr.len);
2555 * get PFKEY message length for security policy and request.
2558 key_getspreqmsglen(sp)
2559 struct secpolicy *sp;
2563 tlen = sizeof(struct sadb_x_policy);
2565 /* if is the policy for ipsec ? */
2566 if (sp->policy != IPSEC_POLICY_IPSEC)
2569 /* get length of ipsec requests */
2571 struct ipsecrequest *isr;
2574 for (isr = sp->req; isr != NULL; isr = isr->next) {
2575 len = sizeof(struct sadb_x_ipsecrequest)
2576 + isr->saidx.src.sa.sa_len
2577 + isr->saidx.dst.sa.sa_len;
2579 tlen += PFKEY_ALIGN8(len);
2587 * SADB_SPDEXPIRE processing
2589 * <base, address(SD), lifetime(CH), policy>
2593 * others : error number
2597 struct secpolicy *sp;
2599 struct mbuf *result = NULL, *m;
2602 struct sadb_lifetime *lt;
2604 /* XXX: Why do we lock ? */
2606 IPSEC_ASSERT(sp != NULL, ("null secpolicy"));
2608 /* set msg header */
2609 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2616 /* create lifetime extension (current and hard) */
2617 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2618 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
2625 bzero(mtod(m, caddr_t), len);
2626 lt = mtod(m, struct sadb_lifetime *);
2627 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2628 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2629 lt->sadb_lifetime_allocations = 0;
2630 lt->sadb_lifetime_bytes = 0;
2631 lt->sadb_lifetime_addtime = sp->created;
2632 lt->sadb_lifetime_usetime = sp->lastused;
2633 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2634 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2635 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2636 lt->sadb_lifetime_allocations = 0;
2637 lt->sadb_lifetime_bytes = 0;
2638 lt->sadb_lifetime_addtime = sp->lifetime;
2639 lt->sadb_lifetime_usetime = sp->validtime;
2643 * Note: do not send SADB_X_EXT_NAT_T_* here:
2644 * we are sending traffic endpoints.
2647 /* set sadb_address for source */
2648 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2650 sp->spidx.prefs, sp->spidx.ul_proto);
2657 /* set sadb_address for destination */
2658 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2660 sp->spidx.prefd, sp->spidx.ul_proto);
2675 if ((result->m_flags & M_PKTHDR) == 0) {
2680 if (result->m_len < sizeof(struct sadb_msg)) {
2681 result = m_pullup(result, sizeof(struct sadb_msg));
2682 if (result == NULL) {
2688 result->m_pkthdr.len = 0;
2689 for (m = result; m; m = m->m_next)
2690 result->m_pkthdr.len += m->m_len;
2692 mtod(result, struct sadb_msg *)->sadb_msg_len =
2693 PFKEY_UNIT64(result->m_pkthdr.len);
2695 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2703 /* %%% SAD management */
2705 * allocating a memory for new SA head, and copy from the values of mhp.
2706 * OUT: NULL : failure due to the lack of memory.
2707 * others : pointer to new SA head.
2709 static struct secashead *
2711 struct secasindex *saidx;
2713 struct secashead *newsah;
2715 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
2717 newsah = malloc(sizeof(struct secashead), M_IPSEC_SAH, M_NOWAIT|M_ZERO);
2718 if (newsah != NULL) {
2720 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++)
2721 LIST_INIT(&newsah->savtree[i]);
2722 newsah->saidx = *saidx;
2724 /* add to saidxtree */
2725 newsah->state = SADB_SASTATE_MATURE;
2728 LIST_INSERT_HEAD(&V_sahtree, newsah, chain);
2735 * delete SA index and all SA registerd.
2739 struct secashead *sah;
2741 struct secasvar *sav, *nextsav;
2745 IPSEC_ASSERT(sah != NULL, ("NULL sah"));
2746 SAHTREE_LOCK_ASSERT();
2748 /* searching all SA registerd in the secindex. */
2750 stateidx < _ARRAYLEN(saorder_state_any);
2752 u_int state = saorder_state_any[stateidx];
2753 LIST_FOREACH_SAFE(sav, &sah->savtree[state], chain, nextsav) {
2754 if (sav->refcnt == 0) {
2756 KEY_CHKSASTATE(state, sav->state, __func__);
2758 * do NOT call KEY_FREESAV here:
2759 * it will only delete the sav if refcnt == 1,
2760 * where we already know that refcnt == 0
2764 /* give up to delete this sa */
2769 if (!zombie) { /* delete only if there are savs */
2770 /* remove from tree of SA index */
2771 if (__LIST_CHAINED(sah))
2772 LIST_REMOVE(sah, chain);
2773 if (sah->route_cache.sa_route.ro_rt) {
2774 RTFREE(sah->route_cache.sa_route.ro_rt);
2775 sah->route_cache.sa_route.ro_rt = (struct rtentry *)NULL;
2777 free(sah, M_IPSEC_SAH);
2782 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2783 * and copy the values of mhp into new buffer.
2784 * When SAD message type is GETSPI:
2785 * to set sequence number from acq_seq++,
2786 * to set zero to SPI.
2787 * not to call key_setsava().
2789 * others : pointer to new secasvar.
2791 * does not modify mbuf. does not free mbuf on error.
2793 static struct secasvar *
2794 key_newsav(m, mhp, sah, errp, where, tag)
2796 const struct sadb_msghdr *mhp;
2797 struct secashead *sah;
2802 struct secasvar *newsav;
2803 const struct sadb_sa *xsa;
2805 IPSEC_ASSERT(m != NULL, ("null mbuf"));
2806 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
2807 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
2808 IPSEC_ASSERT(sah != NULL, ("null secashead"));
2810 newsav = malloc(sizeof(struct secasvar), M_IPSEC_SA, M_NOWAIT|M_ZERO);
2811 if (newsav == NULL) {
2812 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
2817 switch (mhp->msg->sadb_msg_type) {
2821 #ifdef IPSEC_DOSEQCHECK
2822 /* sync sequence number */
2823 if (mhp->msg->sadb_msg_seq == 0)
2825 (V_acq_seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq));
2828 newsav->seq = mhp->msg->sadb_msg_seq;
2833 if (mhp->ext[SADB_EXT_SA] == NULL) {
2834 free(newsav, M_IPSEC_SA);
2836 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
2841 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2842 newsav->spi = xsa->sadb_sa_spi;
2843 newsav->seq = mhp->msg->sadb_msg_seq;
2846 free(newsav, M_IPSEC_SA);
2853 /* copy sav values */
2854 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2855 *errp = key_setsaval(newsav, m, mhp);
2857 free(newsav, M_IPSEC_SA);
2863 SECASVAR_LOCK_INIT(newsav);
2866 newsav->created = time_second;
2867 newsav->pid = mhp->msg->sadb_msg_pid;
2872 newsav->state = SADB_SASTATE_LARVAL;
2875 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2879 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
2880 printf("DP %s from %s:%u return SP:%p\n", __func__,
2881 where, tag, newsav));
2887 * free() SA variable entry.
2890 key_cleansav(struct secasvar *sav)
2893 * Cleanup xform state. Note that zeroize'ing causes the
2894 * keys to be cleared; otherwise we must do it ourself.
2896 if (sav->tdb_xform != NULL) {
2897 sav->tdb_xform->xf_zeroize(sav);
2898 sav->tdb_xform = NULL;
2900 KASSERT(sav->iv == NULL, ("iv but no xform"));
2901 if (sav->key_auth != NULL)
2902 bzero(sav->key_auth->key_data, _KEYLEN(sav->key_auth));
2903 if (sav->key_enc != NULL)
2904 bzero(sav->key_enc->key_data, _KEYLEN(sav->key_enc));
2906 if (sav->key_auth != NULL) {
2907 if (sav->key_auth->key_data != NULL)
2908 free(sav->key_auth->key_data, M_IPSEC_MISC);
2909 free(sav->key_auth, M_IPSEC_MISC);
2910 sav->key_auth = NULL;
2912 if (sav->key_enc != NULL) {
2913 if (sav->key_enc->key_data != NULL)
2914 free(sav->key_enc->key_data, M_IPSEC_MISC);
2915 free(sav->key_enc, M_IPSEC_MISC);
2916 sav->key_enc = NULL;
2919 bzero(sav->sched, sav->schedlen);
2920 free(sav->sched, M_IPSEC_MISC);
2923 if (sav->replay != NULL) {
2924 free(sav->replay, M_IPSEC_MISC);
2927 if (sav->lft_c != NULL) {
2928 free(sav->lft_c, M_IPSEC_MISC);
2931 if (sav->lft_h != NULL) {
2932 free(sav->lft_h, M_IPSEC_MISC);
2935 if (sav->lft_s != NULL) {
2936 free(sav->lft_s, M_IPSEC_MISC);
2942 * free() SA variable entry.
2946 struct secasvar *sav;
2948 IPSEC_ASSERT(sav != NULL, ("null sav"));
2949 IPSEC_ASSERT(sav->refcnt == 0, ("reference count %u > 0", sav->refcnt));
2951 /* remove from SA header */
2952 if (__LIST_CHAINED(sav))
2953 LIST_REMOVE(sav, chain);
2955 SECASVAR_LOCK_DESTROY(sav);
2956 free(sav, M_IPSEC_SA);
2963 * others : found, pointer to a SA.
2965 static struct secashead *
2967 struct secasindex *saidx;
2969 struct secashead *sah;
2972 LIST_FOREACH(sah, &V_sahtree, chain) {
2973 if (sah->state == SADB_SASTATE_DEAD)
2975 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2984 * check not to be duplicated SPI.
2985 * NOTE: this function is too slow due to searching all SAD.
2988 * others : found, pointer to a SA.
2990 static struct secasvar *
2991 key_checkspidup(saidx, spi)
2992 struct secasindex *saidx;
2995 struct secashead *sah;
2996 struct secasvar *sav;
2998 /* check address family */
2999 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) {
3000 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n",
3008 LIST_FOREACH(sah, &V_sahtree, chain) {
3009 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
3011 sav = key_getsavbyspi(sah, spi);
3021 * search SAD litmited alive SA, protocol, SPI.
3024 * others : found, pointer to a SA.
3026 static struct secasvar *
3027 key_getsavbyspi(sah, spi)
3028 struct secashead *sah;
3031 struct secasvar *sav;
3032 u_int stateidx, state;
3035 SAHTREE_LOCK_ASSERT();
3036 /* search all status */
3038 stateidx < _ARRAYLEN(saorder_state_alive);
3041 state = saorder_state_alive[stateidx];
3042 LIST_FOREACH(sav, &sah->savtree[state], chain) {
3045 if (sav->state != state) {
3046 ipseclog((LOG_DEBUG, "%s: "
3047 "invalid sav->state (queue: %d SA: %d)\n",
3048 __func__, state, sav->state));
3052 if (sav->spi == spi)
3061 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
3062 * You must update these if need.
3066 * does not modify mbuf. does not free mbuf on error.
3069 key_setsaval(sav, m, mhp)
3070 struct secasvar *sav;
3072 const struct sadb_msghdr *mhp;
3076 IPSEC_ASSERT(m != NULL, ("null mbuf"));
3077 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
3078 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
3080 /* initialization */
3082 sav->key_auth = NULL;
3083 sav->key_enc = NULL;
3090 sav->tdb_xform = NULL; /* transform */
3091 sav->tdb_encalgxform = NULL; /* encoding algorithm */
3092 sav->tdb_authalgxform = NULL; /* authentication algorithm */
3093 sav->tdb_compalgxform = NULL; /* compression algorithm */
3094 /* Initialize even if NAT-T not compiled in: */
3096 sav->natt_esp_frag_len = 0;
3099 if (mhp->ext[SADB_EXT_SA] != NULL) {
3100 const struct sadb_sa *sa0;
3102 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
3103 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
3108 sav->alg_auth = sa0->sadb_sa_auth;
3109 sav->alg_enc = sa0->sadb_sa_encrypt;
3110 sav->flags = sa0->sadb_sa_flags;
3113 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
3114 sav->replay = (struct secreplay *)
3115 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_IPSEC_MISC, M_NOWAIT|M_ZERO);
3116 if (sav->replay == NULL) {
3117 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3122 if (sa0->sadb_sa_replay != 0)
3123 sav->replay->bitmap = (caddr_t)(sav->replay+1);
3124 sav->replay->wsize = sa0->sadb_sa_replay;
3128 /* Authentication keys */
3129 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
3130 const struct sadb_key *key0;
3133 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
3134 len = mhp->extlen[SADB_EXT_KEY_AUTH];
3137 if (len < sizeof(*key0)) {
3141 switch (mhp->msg->sadb_msg_satype) {
3142 case SADB_SATYPE_AH:
3143 case SADB_SATYPE_ESP:
3144 case SADB_X_SATYPE_TCPSIGNATURE:
3145 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3146 sav->alg_auth != SADB_X_AALG_NULL)
3149 case SADB_X_SATYPE_IPCOMP:
3155 ipseclog((LOG_DEBUG, "%s: invalid key_auth values.\n",
3160 sav->key_auth = (struct seckey *)key_dup_keymsg(key0, len,
3162 if (sav->key_auth == NULL ) {
3163 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3170 /* Encryption key */
3171 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
3172 const struct sadb_key *key0;
3175 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
3176 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
3179 if (len < sizeof(*key0)) {
3183 switch (mhp->msg->sadb_msg_satype) {
3184 case SADB_SATYPE_ESP:
3185 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3186 sav->alg_enc != SADB_EALG_NULL) {
3190 sav->key_enc = (struct seckey *)key_dup_keymsg(key0,
3193 if (sav->key_enc == NULL) {
3194 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3200 case SADB_X_SATYPE_IPCOMP:
3201 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3203 sav->key_enc = NULL; /*just in case*/
3205 case SADB_SATYPE_AH:
3206 case SADB_X_SATYPE_TCPSIGNATURE:
3212 ipseclog((LOG_DEBUG, "%s: invalid key_enc value.\n",
3221 switch (mhp->msg->sadb_msg_satype) {
3222 case SADB_SATYPE_AH:
3223 error = xform_init(sav, XF_AH);
3225 case SADB_SATYPE_ESP:
3226 error = xform_init(sav, XF_ESP);
3228 case SADB_X_SATYPE_IPCOMP:
3229 error = xform_init(sav, XF_IPCOMP);
3231 case SADB_X_SATYPE_TCPSIGNATURE:
3232 error = xform_init(sav, XF_TCPSIGNATURE);
3236 ipseclog((LOG_DEBUG, "%s: unable to initialize SA type %u.\n",
3237 __func__, mhp->msg->sadb_msg_satype));
3242 sav->created = time_second;
3244 /* make lifetime for CURRENT */
3245 sav->lft_c = malloc(sizeof(struct seclifetime), M_IPSEC_MISC, M_NOWAIT);
3246 if (sav->lft_c == NULL) {
3247 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3252 sav->lft_c->allocations = 0;
3253 sav->lft_c->bytes = 0;
3254 sav->lft_c->addtime = time_second;
3255 sav->lft_c->usetime = 0;
3257 /* lifetimes for HARD and SOFT */
3259 const struct sadb_lifetime *lft0;
3261 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3263 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3267 sav->lft_h = key_dup_lifemsg(lft0, M_IPSEC_MISC);
3268 if (sav->lft_h == NULL) {
3269 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
3273 /* to be initialize ? */
3276 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3278 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3282 sav->lft_s = key_dup_lifemsg(lft0, M_IPSEC_MISC);
3283 if (sav->lft_s == NULL) {
3284 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
3288 /* to be initialize ? */
3295 /* initialization */
3302 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3307 key_mature(struct secasvar *sav)
3311 /* check SPI value */
3312 switch (sav->sah->saidx.proto) {
3316 * RFC 4302, 2.4. Security Parameters Index (SPI), SPI values
3317 * 1-255 reserved by IANA for future use,
3318 * 0 for implementation specific, local use.
3320 if (ntohl(sav->spi) <= 255) {
3321 ipseclog((LOG_DEBUG, "%s: illegal range of SPI %u.\n",
3322 __func__, (u_int32_t)ntohl(sav->spi)));
3329 switch (sav->sah->saidx.proto) {
3332 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) ==
3333 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) {
3334 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
3335 "given to old-esp.\n", __func__));
3338 error = xform_init(sav, XF_ESP);
3342 if (sav->flags & SADB_X_EXT_DERIV) {
3343 ipseclog((LOG_DEBUG, "%s: invalid flag (derived) "
3344 "given to AH SA.\n", __func__));
3347 if (sav->alg_enc != SADB_EALG_NONE) {
3348 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3349 "mismated.\n", __func__));
3352 error = xform_init(sav, XF_AH);
3354 case IPPROTO_IPCOMP:
3355 if (sav->alg_auth != SADB_AALG_NONE) {
3356 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3357 "mismated.\n", __func__));
3360 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3361 && ntohl(sav->spi) >= 0x10000) {
3362 ipseclog((LOG_DEBUG, "%s: invalid cpi for IPComp.\n",
3366 error = xform_init(sav, XF_IPCOMP);
3369 if (sav->alg_enc != SADB_EALG_NONE) {
3370 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3371 "mismated.\n", __func__));
3374 error = xform_init(sav, XF_TCPSIGNATURE);
3377 ipseclog((LOG_DEBUG, "%s: Invalid satype.\n", __func__));
3378 error = EPROTONOSUPPORT;
3383 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3390 * subroutine for SADB_GET and SADB_DUMP.
3392 static struct mbuf *
3393 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3394 u_int32_t seq, u_int32_t pid)
3396 struct mbuf *result = NULL, *tres = NULL, *m;
3399 SADB_EXT_SA, SADB_X_EXT_SA2,
3400 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3401 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3402 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3403 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3404 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3406 SADB_X_EXT_NAT_T_TYPE,
3407 SADB_X_EXT_NAT_T_SPORT, SADB_X_EXT_NAT_T_DPORT,
3408 SADB_X_EXT_NAT_T_OAI, SADB_X_EXT_NAT_T_OAR,
3409 SADB_X_EXT_NAT_T_FRAG,
3413 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3418 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3420 switch (dumporder[i]) {
3422 m = key_setsadbsa(sav);
3427 case SADB_X_EXT_SA2:
3428 m = key_setsadbxsa2(sav->sah->saidx.mode,
3429 sav->replay ? sav->replay->count : 0,
3430 sav->sah->saidx.reqid);
3435 case SADB_EXT_ADDRESS_SRC:
3436 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3437 &sav->sah->saidx.src.sa,
3438 FULLMASK, IPSEC_ULPROTO_ANY);
3443 case SADB_EXT_ADDRESS_DST:
3444 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3445 &sav->sah->saidx.dst.sa,
3446 FULLMASK, IPSEC_ULPROTO_ANY);
3451 case SADB_EXT_KEY_AUTH:
3454 m = key_setkey(sav->key_auth, SADB_EXT_KEY_AUTH);
3459 case SADB_EXT_KEY_ENCRYPT:
3462 m = key_setkey(sav->key_enc, SADB_EXT_KEY_ENCRYPT);
3467 case SADB_EXT_LIFETIME_CURRENT:
3470 m = key_setlifetime(sav->lft_c,
3471 SADB_EXT_LIFETIME_CURRENT);
3476 case SADB_EXT_LIFETIME_HARD:
3479 m = key_setlifetime(sav->lft_h,
3480 SADB_EXT_LIFETIME_HARD);
3485 case SADB_EXT_LIFETIME_SOFT:
3488 m = key_setlifetime(sav->lft_s,
3489 SADB_EXT_LIFETIME_SOFT);
3496 case SADB_X_EXT_NAT_T_TYPE:
3497 m = key_setsadbxtype(sav->natt_type);
3502 case SADB_X_EXT_NAT_T_DPORT:
3503 m = key_setsadbxport(
3504 KEY_PORTFROMSADDR(&sav->sah->saidx.dst),
3505 SADB_X_EXT_NAT_T_DPORT);
3510 case SADB_X_EXT_NAT_T_SPORT:
3511 m = key_setsadbxport(
3512 KEY_PORTFROMSADDR(&sav->sah->saidx.src),
3513 SADB_X_EXT_NAT_T_SPORT);
3518 case SADB_X_EXT_NAT_T_OAI:
3519 case SADB_X_EXT_NAT_T_OAR:
3520 case SADB_X_EXT_NAT_T_FRAG:
3521 /* We do not (yet) support those. */
3525 case SADB_EXT_ADDRESS_PROXY:
3526 case SADB_EXT_IDENTITY_SRC:
3527 case SADB_EXT_IDENTITY_DST:
3528 /* XXX: should we brought from SPD ? */
3529 case SADB_EXT_SENSITIVITY:
3542 m_cat(result, tres);
3543 if (result->m_len < sizeof(struct sadb_msg)) {
3544 result = m_pullup(result, sizeof(struct sadb_msg));
3549 result->m_pkthdr.len = 0;
3550 for (m = result; m; m = m->m_next)
3551 result->m_pkthdr.len += m->m_len;
3553 mtod(result, struct sadb_msg *)->sadb_msg_len =
3554 PFKEY_UNIT64(result->m_pkthdr.len);
3565 * set data into sadb_msg.
3567 static struct mbuf *
3568 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq,
3569 pid_t pid, u_int16_t reserved)
3575 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3578 MGETHDR(m, M_NOWAIT, MT_DATA);
3579 if (m && len > MHLEN) {
3580 MCLGET(m, M_NOWAIT);
3581 if ((m->m_flags & M_EXT) == 0) {
3588 m->m_pkthdr.len = m->m_len = len;
3591 p = mtod(m, struct sadb_msg *);
3594 p->sadb_msg_version = PF_KEY_V2;
3595 p->sadb_msg_type = type;
3596 p->sadb_msg_errno = 0;
3597 p->sadb_msg_satype = satype;
3598 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3599 p->sadb_msg_reserved = reserved;
3600 p->sadb_msg_seq = seq;
3601 p->sadb_msg_pid = (u_int32_t)pid;
3607 * copy secasvar data into sadb_address.
3609 static struct mbuf *
3611 struct secasvar *sav;
3617 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3618 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3623 p = mtod(m, struct sadb_sa *);
3625 p->sadb_sa_len = PFKEY_UNIT64(len);
3626 p->sadb_sa_exttype = SADB_EXT_SA;
3627 p->sadb_sa_spi = sav->spi;
3628 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3629 p->sadb_sa_state = sav->state;
3630 p->sadb_sa_auth = sav->alg_auth;
3631 p->sadb_sa_encrypt = sav->alg_enc;
3632 p->sadb_sa_flags = sav->flags;
3638 * set data into sadb_address.
3640 static struct mbuf *
3641 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen, u_int16_t ul_proto)
3644 struct sadb_address *p;
3647 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3648 PFKEY_ALIGN8(saddr->sa_len);
3649 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3654 p = mtod(m, struct sadb_address *);
3657 p->sadb_address_len = PFKEY_UNIT64(len);
3658 p->sadb_address_exttype = exttype;
3659 p->sadb_address_proto = ul_proto;
3660 if (prefixlen == FULLMASK) {
3661 switch (saddr->sa_family) {
3663 prefixlen = sizeof(struct in_addr) << 3;
3666 prefixlen = sizeof(struct in6_addr) << 3;
3672 p->sadb_address_prefixlen = prefixlen;
3673 p->sadb_address_reserved = 0;
3676 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3683 * set data into sadb_x_sa2.
3685 static struct mbuf *
3686 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3689 struct sadb_x_sa2 *p;
3692 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3693 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3698 p = mtod(m, struct sadb_x_sa2 *);
3701 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3702 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3703 p->sadb_x_sa2_mode = mode;
3704 p->sadb_x_sa2_reserved1 = 0;
3705 p->sadb_x_sa2_reserved2 = 0;
3706 p->sadb_x_sa2_sequence = seq;
3707 p->sadb_x_sa2_reqid = reqid;
3714 * Set a type in sadb_x_nat_t_type.
3716 static struct mbuf *
3717 key_setsadbxtype(u_int16_t type)
3721 struct sadb_x_nat_t_type *p;
3723 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type));
3725 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3730 p = mtod(m, struct sadb_x_nat_t_type *);
3733 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len);
3734 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
3735 p->sadb_x_nat_t_type_type = type;
3740 * Set a port in sadb_x_nat_t_port.
3741 * In contrast to default RFC 2367 behaviour, port is in network byte order.
3743 static struct mbuf *
3744 key_setsadbxport(u_int16_t port, u_int16_t type)
3748 struct sadb_x_nat_t_port *p;
3750 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port));
3752 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3757 p = mtod(m, struct sadb_x_nat_t_port *);
3760 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len);
3761 p->sadb_x_nat_t_port_exttype = type;
3762 p->sadb_x_nat_t_port_port = port;
3768 * Get port from sockaddr. Port is in network byte order.
3771 key_portfromsaddr(struct sockaddr *sa)
3774 switch (sa->sa_family) {
3777 return ((struct sockaddr_in *)sa)->sin_port;
3781 return ((struct sockaddr_in6 *)sa)->sin6_port;
3784 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
3785 printf("DP %s unexpected address family %d\n",
3786 __func__, sa->sa_family));
3789 #endif /* IPSEC_NAT_T */
3792 * Set port in struct sockaddr. Port is in network byte order.
3795 key_porttosaddr(struct sockaddr *sa, u_int16_t port)
3798 switch (sa->sa_family) {
3801 ((struct sockaddr_in *)sa)->sin_port = port;
3806 ((struct sockaddr_in6 *)sa)->sin6_port = port;
3810 ipseclog((LOG_DEBUG, "%s: unexpected address family %d.\n",
3811 __func__, sa->sa_family));
3817 * set data into sadb_x_policy
3819 static struct mbuf *
3820 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
3823 struct sadb_x_policy *p;
3826 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3827 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
3832 p = mtod(m, struct sadb_x_policy *);
3835 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3836 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3837 p->sadb_x_policy_type = type;
3838 p->sadb_x_policy_dir = dir;
3839 p->sadb_x_policy_id = id;
3845 /* Take a key message (sadb_key) from the socket and turn it into one
3846 * of the kernel's key structures (seckey).
3848 * IN: pointer to the src
3849 * OUT: NULL no more memory
3852 key_dup_keymsg(const struct sadb_key *src, u_int len,
3853 struct malloc_type *type)
3856 dst = (struct seckey *)malloc(sizeof(struct seckey), type, M_NOWAIT);
3858 dst->bits = src->sadb_key_bits;
3859 dst->key_data = (char *)malloc(len, type, M_NOWAIT);
3860 if (dst->key_data != NULL) {
3861 bcopy((const char *)src + sizeof(struct sadb_key),
3862 dst->key_data, len);
3864 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3870 ipseclog((LOG_DEBUG, "%s: No more memory.\n",
3877 /* Take a lifetime message (sadb_lifetime) passed in on a socket and
3878 * turn it into one of the kernel's lifetime structures (seclifetime).
3880 * IN: pointer to the destination, source and malloc type
3881 * OUT: NULL, no more memory
3884 static struct seclifetime *
3885 key_dup_lifemsg(const struct sadb_lifetime *src,
3886 struct malloc_type *type)
3888 struct seclifetime *dst = NULL;
3890 dst = (struct seclifetime *)malloc(sizeof(struct seclifetime),
3894 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
3896 dst->allocations = src->sadb_lifetime_allocations;
3897 dst->bytes = src->sadb_lifetime_bytes;
3898 dst->addtime = src->sadb_lifetime_addtime;
3899 dst->usetime = src->sadb_lifetime_usetime;
3904 /* compare my own address
3905 * OUT: 1: true, i.e. my address.
3909 key_ismyaddr(struct sockaddr *sa)
3912 IPSEC_ASSERT(sa != NULL, ("null sockaddr"));
3913 switch (sa->sa_family) {
3916 return (in_localip(satosin(sa)->sin_addr));
3920 return key_ismyaddr6((struct sockaddr_in6 *)sa);
3929 * compare my own address for IPv6.
3932 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3934 #include <netinet6/in6_var.h>
3938 struct sockaddr_in6 *sin6;
3940 struct in6_ifaddr *ia;
3942 struct in6_multi *in6m;
3946 TAILQ_FOREACH(ia, &V_in6_ifaddrhead, ia_link) {
3947 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3948 (struct sockaddr *)&ia->ia_addr, 0) == 0) {
3949 IN6_IFADDR_RUNLOCK();
3956 * XXX why do we care about multlicast here while we don't care
3957 * about IPv4 multicast??
3961 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3963 IN6_IFADDR_RUNLOCK();
3968 IN6_IFADDR_RUNLOCK();
3970 /* loopback, just for safety */
3971 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3979 * compare two secasindex structure.
3980 * flag can specify to compare 2 saidxes.
3981 * compare two secasindex structure without both mode and reqid.
3982 * don't compare port.
3984 * saidx0: source, it can be in SAD.
3992 const struct secasindex *saidx0,
3993 const struct secasindex *saidx1,
3999 if (saidx0 == NULL && saidx1 == NULL)
4002 if (saidx0 == NULL || saidx1 == NULL)
4005 if (saidx0->proto != saidx1->proto)
4008 if (flag == CMP_EXACTLY) {
4009 if (saidx0->mode != saidx1->mode)
4011 if (saidx0->reqid != saidx1->reqid)
4013 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 ||
4014 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0)
4018 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
4019 if (flag == CMP_MODE_REQID
4020 ||flag == CMP_REQID) {
4022 * If reqid of SPD is non-zero, unique SA is required.
4023 * The result must be of same reqid in this case.
4025 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
4029 if (flag == CMP_MODE_REQID) {
4030 if (saidx0->mode != IPSEC_MODE_ANY
4031 && saidx0->mode != saidx1->mode)
4037 * If NAT-T is enabled, check ports for tunnel mode.
4038 * Do not check ports if they are set to zero in the SPD.
4039 * Also do not do it for native transport mode, as there
4040 * is no port information available in the SP.
4042 if ((saidx1->mode == IPSEC_MODE_TUNNEL ||
4043 (saidx1->mode == IPSEC_MODE_TRANSPORT &&
4044 saidx1->proto == IPPROTO_ESP)) &&
4045 saidx1->src.sa.sa_family == AF_INET &&
4046 saidx1->dst.sa.sa_family == AF_INET &&
4047 ((const struct sockaddr_in *)(&saidx1->src))->sin_port &&
4048 ((const struct sockaddr_in *)(&saidx1->dst))->sin_port)
4050 #endif /* IPSEC_NAT_T */
4052 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) {
4055 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) {
4064 * compare two secindex structure exactly.
4066 * spidx0: source, it is often in SPD.
4067 * spidx1: object, it is often from PFKEY message.
4073 key_cmpspidx_exactly(
4074 struct secpolicyindex *spidx0,
4075 struct secpolicyindex *spidx1)
4078 if (spidx0 == NULL && spidx1 == NULL)
4081 if (spidx0 == NULL || spidx1 == NULL)
4084 if (spidx0->prefs != spidx1->prefs
4085 || spidx0->prefd != spidx1->prefd
4086 || spidx0->ul_proto != spidx1->ul_proto)
4089 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
4090 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
4094 * compare two secindex structure with mask.
4096 * spidx0: source, it is often in SPD.
4097 * spidx1: object, it is often from IP header.
4103 key_cmpspidx_withmask(
4104 struct secpolicyindex *spidx0,
4105 struct secpolicyindex *spidx1)
4108 if (spidx0 == NULL && spidx1 == NULL)
4111 if (spidx0 == NULL || spidx1 == NULL)
4114 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
4115 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
4116 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
4117 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
4120 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
4121 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
4122 && spidx0->ul_proto != spidx1->ul_proto)
4125 switch (spidx0->src.sa.sa_family) {
4127 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
4128 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
4130 if (!key_bbcmp(&spidx0->src.sin.sin_addr,
4131 &spidx1->src.sin.sin_addr, spidx0->prefs))
4135 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
4136 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
4139 * scope_id check. if sin6_scope_id is 0, we regard it
4140 * as a wildcard scope, which matches any scope zone ID.
4142 if (spidx0->src.sin6.sin6_scope_id &&
4143 spidx1->src.sin6.sin6_scope_id &&
4144 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
4146 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
4147 &spidx1->src.sin6.sin6_addr, spidx0->prefs))
4152 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
4157 switch (spidx0->dst.sa.sa_family) {
4159 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
4160 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
4162 if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
4163 &spidx1->dst.sin.sin_addr, spidx0->prefd))
4167 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
4168 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
4171 * scope_id check. if sin6_scope_id is 0, we regard it
4172 * as a wildcard scope, which matches any scope zone ID.
4174 if (spidx0->dst.sin6.sin6_scope_id &&
4175 spidx1->dst.sin6.sin6_scope_id &&
4176 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
4178 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
4179 &spidx1->dst.sin6.sin6_addr, spidx0->prefd))
4184 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
4189 /* XXX Do we check other field ? e.g. flowinfo */
4194 /* returns 0 on match */
4197 const struct sockaddr *sa1,
4198 const struct sockaddr *sa2,
4204 #define satosin(s) ((const struct sockaddr_in *)s)
4208 #define satosin6(s) ((const struct sockaddr_in6 *)s)
4209 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4212 switch (sa1->sa_family) {
4214 if (sa1->sa_len != sizeof(struct sockaddr_in))
4216 if (satosin(sa1)->sin_addr.s_addr !=
4217 satosin(sa2)->sin_addr.s_addr) {
4220 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4224 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4225 return 1; /*EINVAL*/
4226 if (satosin6(sa1)->sin6_scope_id !=
4227 satosin6(sa2)->sin6_scope_id) {
4230 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4231 &satosin6(sa2)->sin6_addr)) {
4235 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4240 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4251 * compare two buffers with mask.
4255 * bits: Number of bits to compare
4261 key_bbcmp(const void *a1, const void *a2, u_int bits)
4263 const unsigned char *p1 = a1;
4264 const unsigned char *p2 = a2;
4266 /* XXX: This could be considerably faster if we compare a word
4267 * at a time, but it is complicated on LSB Endian machines */
4269 /* Handle null pointers */
4270 if (p1 == NULL || p2 == NULL)
4280 u_int8_t mask = ~((1<<(8-bits))-1);
4281 if ((*p1 & mask) != (*p2 & mask))
4284 return 1; /* Match! */
4288 key_flush_spd(time_t now)
4290 static u_int16_t sptree_scangen = 0;
4291 u_int16_t gen = sptree_scangen++;
4292 struct secpolicy *sp;
4296 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4299 LIST_FOREACH(sp, &V_sptree[dir], chain) {
4300 if (sp->scangen == gen) /* previously handled */
4303 if (sp->state == IPSEC_SPSTATE_DEAD &&
4306 * Ensure that we only decrease refcnt once,
4307 * when we're the last consumer.
4308 * Directly call SP_DELREF/key_delsp instead
4309 * of KEY_FREESP to avoid unlocking/relocking
4310 * SPTREE_LOCK before key_delsp: may refcnt
4311 * be increased again during that time ?
4312 * NB: also clean entries created by
4320 if (sp->lifetime == 0 && sp->validtime == 0)
4322 if ((sp->lifetime && now - sp->created > sp->lifetime)
4323 || (sp->validtime && now - sp->lastused > sp->validtime)) {
4324 sp->state = IPSEC_SPSTATE_DEAD;
4335 key_flush_sad(time_t now)
4337 struct secashead *sah, *nextsah;
4338 struct secasvar *sav, *nextsav;
4342 LIST_FOREACH_SAFE(sah, &V_sahtree, chain, nextsah) {
4343 /* if sah has been dead, then delete it and process next sah. */
4344 if (sah->state == SADB_SASTATE_DEAD) {
4349 /* if LARVAL entry doesn't become MATURE, delete it. */
4350 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_LARVAL], chain, nextsav) {
4351 /* Need to also check refcnt for a larval SA ??? */
4352 if (now - sav->created > V_key_larval_lifetime)
4357 * check MATURE entry to start to send expire message
4360 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_MATURE], chain, nextsav) {
4361 /* we don't need to check. */
4362 if (sav->lft_s == NULL)
4366 if (sav->lft_c == NULL) {
4367 ipseclog((LOG_DEBUG,"%s: there is no CURRENT "
4368 "time, why?\n", __func__));
4372 /* check SOFT lifetime */
4373 if (sav->lft_s->addtime != 0 &&
4374 now - sav->created > sav->lft_s->addtime) {
4375 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4377 * Actually, only send expire message if
4378 * SA has been used, as it was done before,
4379 * but should we always send such message,
4380 * and let IKE daemon decide if it should be
4381 * renegotiated or not ?
4382 * XXX expire message will actually NOT be
4383 * sent if SA is only used after soft
4384 * lifetime has been reached, see below
4387 if (sav->lft_c->usetime != 0)
4390 /* check SOFT lifetime by bytes */
4392 * XXX I don't know the way to delete this SA
4393 * when new SA is installed. Caution when it's
4394 * installed too big lifetime by time.
4396 else if (sav->lft_s->bytes != 0 &&
4397 sav->lft_s->bytes < sav->lft_c->bytes) {
4399 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4401 * XXX If we keep to send expire
4402 * message in the status of
4403 * DYING. Do remove below code.
4409 /* check DYING entry to change status to DEAD. */
4410 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DYING], chain, nextsav) {
4411 /* we don't need to check. */
4412 if (sav->lft_h == NULL)
4416 if (sav->lft_c == NULL) {
4417 ipseclog((LOG_DEBUG, "%s: there is no CURRENT "
4418 "time, why?\n", __func__));
4422 if (sav->lft_h->addtime != 0 &&
4423 now - sav->created > sav->lft_h->addtime) {
4424 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4427 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4428 else if (sav->lft_s != NULL
4429 && sav->lft_s->addtime != 0
4430 && now - sav->created > sav->lft_s->addtime) {
4432 * XXX: should be checked to be
4433 * installed the valid SA.
4437 * If there is no SA then sending
4443 /* check HARD lifetime by bytes */
4444 else if (sav->lft_h->bytes != 0 &&
4445 sav->lft_h->bytes < sav->lft_c->bytes) {
4446 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4451 /* delete entry in DEAD */
4452 LIST_FOREACH_SAFE(sav, &sah->savtree[SADB_SASTATE_DEAD], chain, nextsav) {
4454 if (sav->state != SADB_SASTATE_DEAD) {
4455 ipseclog((LOG_DEBUG, "%s: invalid sav->state "
4456 "(queue: %d SA: %d): kill it anyway\n",
4458 SADB_SASTATE_DEAD, sav->state));
4461 * do not call key_freesav() here.
4462 * sav should already be freed, and sav->refcnt
4463 * shows other references to sav
4464 * (such as from SPD).
4472 key_flush_acq(time_t now)
4474 struct secacq *acq, *nextacq;
4478 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) {
4479 nextacq = LIST_NEXT(acq, chain);
4480 if (now - acq->created > V_key_blockacq_lifetime
4481 && __LIST_CHAINED(acq)) {
4482 LIST_REMOVE(acq, chain);
4483 free(acq, M_IPSEC_SAQ);
4490 key_flush_spacq(time_t now)
4492 struct secspacq *acq, *nextacq;
4496 for (acq = LIST_FIRST(&V_spacqtree); acq != NULL; acq = nextacq) {
4497 nextacq = LIST_NEXT(acq, chain);
4498 if (now - acq->created > V_key_blockacq_lifetime
4499 && __LIST_CHAINED(acq)) {
4500 LIST_REMOVE(acq, chain);
4501 free(acq, M_IPSEC_SAQ);
4509 * scanning SPD and SAD to check status for each entries,
4510 * and do to remove or to expire.
4511 * XXX: year 2038 problem may remain.
4514 key_timehandler(void *arg)
4516 VNET_ITERATOR_DECL(vnet_iter);
4517 time_t now = time_second;
4519 VNET_LIST_RLOCK_NOSLEEP();
4520 VNET_FOREACH(vnet_iter) {
4521 CURVNET_SET(vnet_iter);
4525 key_flush_spacq(now);
4528 VNET_LIST_RUNLOCK_NOSLEEP();
4530 #ifndef IPSEC_DEBUG2
4531 /* do exchange to tick time !! */
4532 callout_schedule(&key_timer, hz);
4533 #endif /* IPSEC_DEBUG2 */
4541 key_randomfill(&value, sizeof(value));
4546 key_randomfill(p, l)
4552 static int warn = 1;
4555 n = (size_t)read_random(p, (u_int)l);
4559 bcopy(&v, (u_int8_t *)p + n,
4560 l - n < sizeof(v) ? l - n : sizeof(v));
4564 printf("WARNING: pseudo-random number generator "
4565 "used for IPsec processing\n");
4572 * map SADB_SATYPE_* to IPPROTO_*.
4573 * if satype == SADB_SATYPE then satype is mapped to ~0.
4575 * 0: invalid satype.
4578 key_satype2proto(u_int8_t satype)
4581 case SADB_SATYPE_UNSPEC:
4582 return IPSEC_PROTO_ANY;
4583 case SADB_SATYPE_AH:
4585 case SADB_SATYPE_ESP:
4587 case SADB_X_SATYPE_IPCOMP:
4588 return IPPROTO_IPCOMP;
4589 case SADB_X_SATYPE_TCPSIGNATURE:
4598 * map IPPROTO_* to SADB_SATYPE_*
4600 * 0: invalid protocol type.
4603 key_proto2satype(u_int16_t proto)
4607 return SADB_SATYPE_AH;
4609 return SADB_SATYPE_ESP;
4610 case IPPROTO_IPCOMP:
4611 return SADB_X_SATYPE_IPCOMP;
4613 return SADB_X_SATYPE_TCPSIGNATURE;
4622 * SADB_GETSPI processing is to receive
4623 * <base, (SA2), src address, dst address, (SPI range)>
4624 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4625 * tree with the status of LARVAL, and send
4626 * <base, SA(*), address(SD)>
4629 * IN: mhp: pointer to the pointer to each header.
4630 * OUT: NULL if fail.
4631 * other if success, return pointer to the message to send.
4634 key_getspi(so, m, mhp)
4637 const struct sadb_msghdr *mhp;
4639 struct sadb_address *src0, *dst0;
4640 struct secasindex saidx;
4641 struct secashead *newsah;
4642 struct secasvar *newsav;
4649 IPSEC_ASSERT(so != NULL, ("null socket"));
4650 IPSEC_ASSERT(m != NULL, ("null mbuf"));
4651 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
4652 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
4654 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4655 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4656 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
4658 return key_senderror(so, m, EINVAL);
4660 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4661 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4662 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
4664 return key_senderror(so, m, EINVAL);
4666 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4667 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4668 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4670 mode = IPSEC_MODE_ANY;
4674 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4675 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4677 /* map satype to proto */
4678 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4679 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
4681 return key_senderror(so, m, EINVAL);
4685 * Make sure the port numbers are zero.
4686 * In case of NAT-T we will update them later if needed.
4688 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
4690 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4691 sizeof(struct sockaddr_in))
4692 return key_senderror(so, m, EINVAL);
4693 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
4696 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4697 sizeof(struct sockaddr_in6))
4698 return key_senderror(so, m, EINVAL);
4699 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
4704 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
4706 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4707 sizeof(struct sockaddr_in))
4708 return key_senderror(so, m, EINVAL);
4709 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
4712 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4713 sizeof(struct sockaddr_in6))
4714 return key_senderror(so, m, EINVAL);
4715 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
4721 /* XXX boundary check against sa_len */
4722 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4726 * Handle NAT-T info if present.
4727 * We made sure the port numbers are zero above, so we do
4728 * not have to worry in case we do not update them.
4730 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL)
4731 ipseclog((LOG_DEBUG, "%s: NAT-T OAi present\n", __func__));
4732 if (mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL)
4733 ipseclog((LOG_DEBUG, "%s: NAT-T OAr present\n", __func__));
4735 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL &&
4736 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
4737 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
4738 struct sadb_x_nat_t_type *type;
4739 struct sadb_x_nat_t_port *sport, *dport;
4741 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) ||
4742 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
4743 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
4744 ipseclog((LOG_DEBUG, "%s: invalid nat-t message "
4745 "passed.\n", __func__));
4746 return key_senderror(so, m, EINVAL);
4749 sport = (struct sadb_x_nat_t_port *)
4750 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
4751 dport = (struct sadb_x_nat_t_port *)
4752 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
4755 KEY_PORTTOSADDR(&saidx.src, sport->sadb_x_nat_t_port_port);
4757 KEY_PORTTOSADDR(&saidx.dst, dport->sadb_x_nat_t_port_port);
4761 /* SPI allocation */
4762 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4765 return key_senderror(so, m, EINVAL);
4767 /* get a SA index */
4768 if ((newsah = key_getsah(&saidx)) == NULL) {
4769 /* create a new SA index */
4770 if ((newsah = key_newsah(&saidx)) == NULL) {
4771 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
4772 return key_senderror(so, m, ENOBUFS);
4778 newsav = KEY_NEWSAV(m, mhp, newsah, &error);
4779 if (newsav == NULL) {
4780 /* XXX don't free new SA index allocated in above. */
4781 return key_senderror(so, m, error);
4785 newsav->spi = htonl(spi);
4787 /* delete the entry in acqtree */
4788 if (mhp->msg->sadb_msg_seq != 0) {
4790 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4791 /* reset counter in order to deletion by timehandler. */
4792 acq->created = time_second;
4798 struct mbuf *n, *nn;
4799 struct sadb_sa *m_sa;
4800 struct sadb_msg *newmsg;
4803 /* create new sadb_msg to reply. */
4804 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4805 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4807 MGETHDR(n, M_NOWAIT, MT_DATA);
4809 MCLGET(n, M_NOWAIT);
4810 if ((n->m_flags & M_EXT) == 0) {
4816 return key_senderror(so, m, ENOBUFS);
4822 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4823 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4825 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4826 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4827 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4828 m_sa->sadb_sa_spi = htonl(spi);
4829 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4831 IPSEC_ASSERT(off == len,
4832 ("length inconsistency (off %u len %u)", off, len));
4834 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4835 SADB_EXT_ADDRESS_DST);
4838 return key_senderror(so, m, ENOBUFS);
4841 if (n->m_len < sizeof(struct sadb_msg)) {
4842 n = m_pullup(n, sizeof(struct sadb_msg));
4844 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4847 n->m_pkthdr.len = 0;
4848 for (nn = n; nn; nn = nn->m_next)
4849 n->m_pkthdr.len += nn->m_len;
4851 newmsg = mtod(n, struct sadb_msg *);
4852 newmsg->sadb_msg_seq = newsav->seq;
4853 newmsg->sadb_msg_errno = 0;
4854 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4857 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4862 * allocating new SPI
4863 * called by key_getspi().
4869 key_do_getnewspi(spirange, saidx)
4870 struct sadb_spirange *spirange;
4871 struct secasindex *saidx;
4875 int count = V_key_spi_trycnt;
4877 /* set spi range to allocate */
4878 if (spirange != NULL) {
4879 min = spirange->sadb_spirange_min;
4880 max = spirange->sadb_spirange_max;
4882 min = V_key_spi_minval;
4883 max = V_key_spi_maxval;
4885 /* IPCOMP needs 2-byte SPI */
4886 if (saidx->proto == IPPROTO_IPCOMP) {
4893 t = min; min = max; max = t;
4898 if (key_checkspidup(saidx, min) != NULL) {
4899 ipseclog((LOG_DEBUG, "%s: SPI %u exists already.\n",
4904 count--; /* taking one cost. */
4912 /* when requesting to allocate spi ranged */
4914 /* generate pseudo-random SPI value ranged. */
4915 newspi = min + (key_random() % (max - min + 1));
4917 if (key_checkspidup(saidx, newspi) == NULL)
4921 if (count == 0 || newspi == 0) {
4922 ipseclog((LOG_DEBUG, "%s: to allocate spi is failed.\n",
4929 keystat.getspi_count =
4930 (keystat.getspi_count + V_key_spi_trycnt - count) / 2;
4936 * SADB_UPDATE processing
4938 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4939 * key(AE), (identity(SD),) (sensitivity)>
4940 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
4942 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4943 * (identity(SD),) (sensitivity)>
4946 * m will always be freed.
4949 key_update(so, m, mhp)
4952 const struct sadb_msghdr *mhp;
4954 struct sadb_sa *sa0;
4955 struct sadb_address *src0, *dst0;
4957 struct sadb_x_nat_t_type *type;
4958 struct sadb_x_nat_t_port *sport, *dport;
4959 struct sadb_address *iaddr, *raddr;
4960 struct sadb_x_nat_t_frag *frag;
4962 struct secasindex saidx;
4963 struct secashead *sah;
4964 struct secasvar *sav;
4970 IPSEC_ASSERT(so != NULL, ("null socket"));
4971 IPSEC_ASSERT(m != NULL, ("null mbuf"));
4972 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
4973 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
4975 /* map satype to proto */
4976 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4977 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
4979 return key_senderror(so, m, EINVAL);
4982 if (mhp->ext[SADB_EXT_SA] == NULL ||
4983 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4984 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4985 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4986 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4987 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4988 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4989 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4990 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4991 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4992 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4993 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
4995 return key_senderror(so, m, EINVAL);
4997 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4998 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4999 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5000 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5002 return key_senderror(so, m, EINVAL);
5004 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
5005 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5006 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5008 mode = IPSEC_MODE_ANY;
5011 /* XXX boundary checking for other extensions */
5013 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5014 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5015 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5017 /* XXX boundary check against sa_len */
5018 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5021 * Make sure the port numbers are zero.
5022 * In case of NAT-T we will update them later if needed.
5024 KEY_PORTTOSADDR(&saidx.src, 0);
5025 KEY_PORTTOSADDR(&saidx.dst, 0);
5029 * Handle NAT-T info if present.
5031 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL &&
5032 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
5033 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
5035 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) ||
5036 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
5037 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
5038 ipseclog((LOG_DEBUG, "%s: invalid message.\n",
5040 return key_senderror(so, m, EINVAL);
5043 type = (struct sadb_x_nat_t_type *)
5044 mhp->ext[SADB_X_EXT_NAT_T_TYPE];
5045 sport = (struct sadb_x_nat_t_port *)
5046 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5047 dport = (struct sadb_x_nat_t_port *)
5048 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5053 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL &&
5054 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) {
5055 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) ||
5056 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) {
5057 ipseclog((LOG_DEBUG, "%s: invalid message\n",
5059 return key_senderror(so, m, EINVAL);
5061 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI];
5062 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR];
5063 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__));
5065 iaddr = raddr = NULL;
5067 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) {
5068 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) {
5069 ipseclog((LOG_DEBUG, "%s: invalid message\n",
5071 return key_senderror(so, m, EINVAL);
5073 frag = (struct sadb_x_nat_t_frag *)
5074 mhp->ext[SADB_X_EXT_NAT_T_FRAG];
5080 /* get a SA header */
5081 if ((sah = key_getsah(&saidx)) == NULL) {
5082 ipseclog((LOG_DEBUG, "%s: no SA index found.\n", __func__));
5083 return key_senderror(so, m, ENOENT);
5086 /* set spidx if there */
5088 error = key_setident(sah, m, mhp);
5090 return key_senderror(so, m, error);
5092 /* find a SA with sequence number. */
5093 #ifdef IPSEC_DOSEQCHECK
5094 if (mhp->msg->sadb_msg_seq != 0
5095 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
5096 ipseclog((LOG_DEBUG, "%s: no larval SA with sequence %u "
5097 "exists.\n", __func__, mhp->msg->sadb_msg_seq));
5098 return key_senderror(so, m, ENOENT);
5102 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5105 ipseclog((LOG_DEBUG, "%s: no such a SA found (spi:%u)\n",
5106 __func__, (u_int32_t)ntohl(sa0->sadb_sa_spi)));
5107 return key_senderror(so, m, EINVAL);
5111 /* validity check */
5112 if (sav->sah->saidx.proto != proto) {
5113 ipseclog((LOG_DEBUG, "%s: protocol mismatched "
5114 "(DB=%u param=%u)\n", __func__,
5115 sav->sah->saidx.proto, proto));
5116 return key_senderror(so, m, EINVAL);
5118 #ifdef IPSEC_DOSEQCHECK
5119 if (sav->spi != sa0->sadb_sa_spi) {
5120 ipseclog((LOG_DEBUG, "%s: SPI mismatched (DB:%u param:%u)\n",
5122 (u_int32_t)ntohl(sav->spi),
5123 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
5124 return key_senderror(so, m, EINVAL);
5127 if (sav->pid != mhp->msg->sadb_msg_pid) {
5128 ipseclog((LOG_DEBUG, "%s: pid mismatched (DB:%u param:%u)\n",
5129 __func__, sav->pid, mhp->msg->sadb_msg_pid));
5130 return key_senderror(so, m, EINVAL);
5133 /* copy sav values */
5134 error = key_setsaval(sav, m, mhp);
5137 return key_senderror(so, m, error);
5142 * Handle more NAT-T info if present,
5143 * now that we have a sav to fill.
5146 sav->natt_type = type->sadb_x_nat_t_type_type;
5149 KEY_PORTTOSADDR(&sav->sah->saidx.src,
5150 sport->sadb_x_nat_t_port_port);
5152 KEY_PORTTOSADDR(&sav->sah->saidx.dst,
5153 dport->sadb_x_nat_t_port_port);
5157 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0.
5158 * We should actually check for a minimum MTU here, if we
5159 * want to support it in ip_output.
5162 sav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen;
5166 /* check SA values to be mature. */
5167 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
5169 return key_senderror(so, m, 0);
5175 /* set msg buf from mhp */
5176 n = key_getmsgbuf_x1(m, mhp);
5178 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5179 return key_senderror(so, m, ENOBUFS);
5183 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5188 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
5189 * only called by key_update().
5192 * others : found, pointer to a SA.
5194 #ifdef IPSEC_DOSEQCHECK
5195 static struct secasvar *
5196 key_getsavbyseq(sah, seq)
5197 struct secashead *sah;
5200 struct secasvar *sav;
5203 state = SADB_SASTATE_LARVAL;
5205 /* search SAD with sequence number ? */
5206 LIST_FOREACH(sav, &sah->savtree[state], chain) {
5208 KEY_CHKSASTATE(state, sav->state, __func__);
5210 if (sav->seq == seq) {
5212 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
5213 printf("DP %s cause refcnt++:%d SA:%p\n",
5214 __func__, sav->refcnt, sav));
5224 * SADB_ADD processing
5225 * add an entry to SA database, when received
5226 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5227 * key(AE), (identity(SD),) (sensitivity)>
5230 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5231 * (identity(SD),) (sensitivity)>
5234 * IGNORE identity and sensitivity messages.
5236 * m will always be freed.
5242 const struct sadb_msghdr *mhp;
5244 struct sadb_sa *sa0;
5245 struct sadb_address *src0, *dst0;
5247 struct sadb_x_nat_t_type *type;
5248 struct sadb_address *iaddr, *raddr;
5249 struct sadb_x_nat_t_frag *frag;
5251 struct secasindex saidx;
5252 struct secashead *newsah;
5253 struct secasvar *newsav;
5259 IPSEC_ASSERT(so != NULL, ("null socket"));
5260 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5261 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5262 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5264 /* map satype to proto */
5265 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5266 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5268 return key_senderror(so, m, EINVAL);
5271 if (mhp->ext[SADB_EXT_SA] == NULL ||
5272 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5273 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
5274 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
5275 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
5276 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
5277 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
5278 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
5279 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
5280 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
5281 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
5282 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5284 return key_senderror(so, m, EINVAL);
5286 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5287 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5288 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5290 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5292 return key_senderror(so, m, EINVAL);
5294 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
5295 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5296 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5298 mode = IPSEC_MODE_ANY;
5302 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5303 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5304 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5306 /* XXX boundary check against sa_len */
5307 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5310 * Make sure the port numbers are zero.
5311 * In case of NAT-T we will update them later if needed.
5313 KEY_PORTTOSADDR(&saidx.src, 0);
5314 KEY_PORTTOSADDR(&saidx.dst, 0);
5318 * Handle NAT-T info if present.
5320 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL &&
5321 mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
5322 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
5323 struct sadb_x_nat_t_port *sport, *dport;
5325 if (mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type) ||
5326 mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
5327 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
5328 ipseclog((LOG_DEBUG, "%s: invalid message.\n",
5330 return key_senderror(so, m, EINVAL);
5333 type = (struct sadb_x_nat_t_type *)
5334 mhp->ext[SADB_X_EXT_NAT_T_TYPE];
5335 sport = (struct sadb_x_nat_t_port *)
5336 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5337 dport = (struct sadb_x_nat_t_port *)
5338 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5341 KEY_PORTTOSADDR(&saidx.src,
5342 sport->sadb_x_nat_t_port_port);
5344 KEY_PORTTOSADDR(&saidx.dst,
5345 dport->sadb_x_nat_t_port_port);
5349 if (mhp->ext[SADB_X_EXT_NAT_T_OAI] != NULL &&
5350 mhp->ext[SADB_X_EXT_NAT_T_OAR] != NULL) {
5351 if (mhp->extlen[SADB_X_EXT_NAT_T_OAI] < sizeof(*iaddr) ||
5352 mhp->extlen[SADB_X_EXT_NAT_T_OAR] < sizeof(*raddr)) {
5353 ipseclog((LOG_DEBUG, "%s: invalid message\n",
5355 return key_senderror(so, m, EINVAL);
5357 iaddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAI];
5358 raddr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OAR];
5359 ipseclog((LOG_DEBUG, "%s: NAT-T OAi/r present\n", __func__));
5361 iaddr = raddr = NULL;
5363 if (mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) {
5364 if (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag)) {
5365 ipseclog((LOG_DEBUG, "%s: invalid message\n",
5367 return key_senderror(so, m, EINVAL);
5369 frag = (struct sadb_x_nat_t_frag *)
5370 mhp->ext[SADB_X_EXT_NAT_T_FRAG];
5376 /* get a SA header */
5377 if ((newsah = key_getsah(&saidx)) == NULL) {
5378 /* create a new SA header */
5379 if ((newsah = key_newsah(&saidx)) == NULL) {
5380 ipseclog((LOG_DEBUG, "%s: No more memory.\n",__func__));
5381 return key_senderror(so, m, ENOBUFS);
5385 /* set spidx if there */
5387 error = key_setident(newsah, m, mhp);
5389 return key_senderror(so, m, error);
5392 /* create new SA entry. */
5393 /* We can create new SA only if SPI is differenct. */
5395 newsav = key_getsavbyspi(newsah, sa0->sadb_sa_spi);
5397 if (newsav != NULL) {
5398 ipseclog((LOG_DEBUG, "%s: SA already exists.\n", __func__));
5399 return key_senderror(so, m, EEXIST);
5401 newsav = KEY_NEWSAV(m, mhp, newsah, &error);
5402 if (newsav == NULL) {
5403 return key_senderror(so, m, error);
5408 * Handle more NAT-T info if present,
5409 * now that we have a sav to fill.
5412 newsav->natt_type = type->sadb_x_nat_t_type_type;
5416 * In case SADB_X_EXT_NAT_T_FRAG was not given, leave it at 0.
5417 * We should actually check for a minimum MTU here, if we
5418 * want to support it in ip_output.
5421 newsav->natt_esp_frag_len = frag->sadb_x_nat_t_frag_fraglen;
5425 /* check SA values to be mature. */
5426 if ((error = key_mature(newsav)) != 0) {
5427 KEY_FREESAV(&newsav);
5428 return key_senderror(so, m, error);
5432 * don't call key_freesav() here, as we would like to keep the SA
5433 * in the database on success.
5439 /* set msg buf from mhp */
5440 n = key_getmsgbuf_x1(m, mhp);
5442 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5443 return key_senderror(so, m, ENOBUFS);
5447 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5453 key_setident(sah, m, mhp)
5454 struct secashead *sah;
5456 const struct sadb_msghdr *mhp;
5458 const struct sadb_ident *idsrc, *iddst;
5459 int idsrclen, iddstlen;
5461 IPSEC_ASSERT(sah != NULL, ("null secashead"));
5462 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5463 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5464 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5466 /* don't make buffer if not there */
5467 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
5468 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5474 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
5475 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5476 ipseclog((LOG_DEBUG, "%s: invalid identity.\n", __func__));
5480 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5481 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5482 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5483 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5485 /* validity check */
5486 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5487 ipseclog((LOG_DEBUG, "%s: ident type mismatch.\n", __func__));
5491 switch (idsrc->sadb_ident_type) {
5492 case SADB_IDENTTYPE_PREFIX:
5493 case SADB_IDENTTYPE_FQDN:
5494 case SADB_IDENTTYPE_USERFQDN:
5496 /* XXX do nothing */
5502 /* make structure */
5503 sah->idents = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
5504 if (sah->idents == NULL) {
5505 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5508 sah->identd = malloc(sizeof(struct secident), M_IPSEC_MISC, M_NOWAIT);
5509 if (sah->identd == NULL) {
5510 free(sah->idents, M_IPSEC_MISC);
5512 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
5515 sah->idents->type = idsrc->sadb_ident_type;
5516 sah->idents->id = idsrc->sadb_ident_id;
5518 sah->identd->type = iddst->sadb_ident_type;
5519 sah->identd->id = iddst->sadb_ident_id;
5525 * m will not be freed on return.
5526 * it is caller's responsibility to free the result.
5528 static struct mbuf *
5529 key_getmsgbuf_x1(m, mhp)
5531 const struct sadb_msghdr *mhp;
5535 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5536 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5537 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5539 /* create new sadb_msg to reply. */
5540 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5541 SADB_EXT_SA, SADB_X_EXT_SA2,
5542 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5543 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5544 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5548 if (n->m_len < sizeof(struct sadb_msg)) {
5549 n = m_pullup(n, sizeof(struct sadb_msg));
5553 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5554 mtod(n, struct sadb_msg *)->sadb_msg_len =
5555 PFKEY_UNIT64(n->m_pkthdr.len);
5560 static int key_delete_all __P((struct socket *, struct mbuf *,
5561 const struct sadb_msghdr *, u_int16_t));
5564 * SADB_DELETE processing
5566 * <base, SA(*), address(SD)>
5567 * from the ikmpd, and set SADB_SASTATE_DEAD,
5569 * <base, SA(*), address(SD)>
5572 * m will always be freed.
5575 key_delete(so, m, mhp)
5578 const struct sadb_msghdr *mhp;
5580 struct sadb_sa *sa0;
5581 struct sadb_address *src0, *dst0;
5582 struct secasindex saidx;
5583 struct secashead *sah;
5584 struct secasvar *sav = NULL;
5587 IPSEC_ASSERT(so != NULL, ("null socket"));
5588 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5589 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5590 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5592 /* map satype to proto */
5593 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5594 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5596 return key_senderror(so, m, EINVAL);
5599 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5600 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5601 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5603 return key_senderror(so, m, EINVAL);
5606 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5607 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5608 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5610 return key_senderror(so, m, EINVAL);
5613 if (mhp->ext[SADB_EXT_SA] == NULL) {
5615 * Caller wants us to delete all non-LARVAL SAs
5616 * that match the src/dst. This is used during
5617 * IKE INITIAL-CONTACT.
5619 ipseclog((LOG_DEBUG, "%s: doing delete all.\n", __func__));
5620 return key_delete_all(so, m, mhp, proto);
5621 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5622 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5624 return key_senderror(so, m, EINVAL);
5627 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5628 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5629 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5631 /* XXX boundary check against sa_len */
5632 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5635 * Make sure the port numbers are zero.
5636 * In case of NAT-T we will update them later if needed.
5638 KEY_PORTTOSADDR(&saidx.src, 0);
5639 KEY_PORTTOSADDR(&saidx.dst, 0);
5643 * Handle NAT-T info if present.
5645 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
5646 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
5647 struct sadb_x_nat_t_port *sport, *dport;
5649 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
5650 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
5651 ipseclog((LOG_DEBUG, "%s: invalid message.\n",
5653 return key_senderror(so, m, EINVAL);
5656 sport = (struct sadb_x_nat_t_port *)
5657 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5658 dport = (struct sadb_x_nat_t_port *)
5659 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5662 KEY_PORTTOSADDR(&saidx.src,
5663 sport->sadb_x_nat_t_port_port);
5665 KEY_PORTTOSADDR(&saidx.dst,
5666 dport->sadb_x_nat_t_port_port);
5670 /* get a SA header */
5672 LIST_FOREACH(sah, &V_sahtree, chain) {
5673 if (sah->state == SADB_SASTATE_DEAD)
5675 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5678 /* get a SA with SPI. */
5679 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5685 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__));
5686 return key_senderror(so, m, ENOENT);
5689 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5695 struct sadb_msg *newmsg;
5697 /* create new sadb_msg to reply. */
5698 /* XXX-BZ NAT-T extensions? */
5699 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5700 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5702 return key_senderror(so, m, ENOBUFS);
5704 if (n->m_len < sizeof(struct sadb_msg)) {
5705 n = m_pullup(n, sizeof(struct sadb_msg));
5707 return key_senderror(so, m, ENOBUFS);
5709 newmsg = mtod(n, struct sadb_msg *);
5710 newmsg->sadb_msg_errno = 0;
5711 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5714 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5719 * delete all SAs for src/dst. Called from key_delete().
5722 key_delete_all(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp,
5725 struct sadb_address *src0, *dst0;
5726 struct secasindex saidx;
5727 struct secashead *sah;
5728 struct secasvar *sav, *nextsav;
5729 u_int stateidx, state;
5731 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5732 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5734 /* XXX boundary check against sa_len */
5735 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5738 * Make sure the port numbers are zero.
5739 * In case of NAT-T we will update them later if needed.
5741 KEY_PORTTOSADDR(&saidx.src, 0);
5742 KEY_PORTTOSADDR(&saidx.dst, 0);
5746 * Handle NAT-T info if present.
5749 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
5750 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
5751 struct sadb_x_nat_t_port *sport, *dport;
5753 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
5754 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
5755 ipseclog((LOG_DEBUG, "%s: invalid message.\n",
5757 return key_senderror(so, m, EINVAL);
5760 sport = (struct sadb_x_nat_t_port *)
5761 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5762 dport = (struct sadb_x_nat_t_port *)
5763 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5766 KEY_PORTTOSADDR(&saidx.src,
5767 sport->sadb_x_nat_t_port_port);
5769 KEY_PORTTOSADDR(&saidx.dst,
5770 dport->sadb_x_nat_t_port_port);
5775 LIST_FOREACH(sah, &V_sahtree, chain) {
5776 if (sah->state == SADB_SASTATE_DEAD)
5778 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5781 /* Delete all non-LARVAL SAs. */
5783 stateidx < _ARRAYLEN(saorder_state_alive);
5785 state = saorder_state_alive[stateidx];
5786 if (state == SADB_SASTATE_LARVAL)
5788 for (sav = LIST_FIRST(&sah->savtree[state]);
5789 sav != NULL; sav = nextsav) {
5790 nextsav = LIST_NEXT(sav, chain);
5792 if (sav->state != state) {
5793 ipseclog((LOG_DEBUG, "%s: invalid "
5794 "sav->state (queue %d SA %d)\n",
5795 __func__, state, sav->state));
5799 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5807 struct sadb_msg *newmsg;
5809 /* create new sadb_msg to reply. */
5810 /* XXX-BZ NAT-T extensions? */
5811 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5812 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5814 return key_senderror(so, m, ENOBUFS);
5816 if (n->m_len < sizeof(struct sadb_msg)) {
5817 n = m_pullup(n, sizeof(struct sadb_msg));
5819 return key_senderror(so, m, ENOBUFS);
5821 newmsg = mtod(n, struct sadb_msg *);
5822 newmsg->sadb_msg_errno = 0;
5823 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5826 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5831 * SADB_GET processing
5833 * <base, SA(*), address(SD)>
5834 * from the ikmpd, and get a SP and a SA to respond,
5836 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5837 * (identity(SD),) (sensitivity)>
5840 * m will always be freed.
5846 const struct sadb_msghdr *mhp;
5848 struct sadb_sa *sa0;
5849 struct sadb_address *src0, *dst0;
5850 struct secasindex saidx;
5851 struct secashead *sah;
5852 struct secasvar *sav = NULL;
5855 IPSEC_ASSERT(so != NULL, ("null socket"));
5856 IPSEC_ASSERT(m != NULL, ("null mbuf"));
5857 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
5858 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
5860 /* map satype to proto */
5861 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5862 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
5864 return key_senderror(so, m, EINVAL);
5867 if (mhp->ext[SADB_EXT_SA] == NULL ||
5868 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5869 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5870 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5872 return key_senderror(so, m, EINVAL);
5874 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5875 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5876 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5877 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
5879 return key_senderror(so, m, EINVAL);
5882 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5883 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5884 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5886 /* XXX boundary check against sa_len */
5887 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5890 * Make sure the port numbers are zero.
5891 * In case of NAT-T we will update them later if needed.
5893 KEY_PORTTOSADDR(&saidx.src, 0);
5894 KEY_PORTTOSADDR(&saidx.dst, 0);
5898 * Handle NAT-T info if present.
5901 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
5902 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
5903 struct sadb_x_nat_t_port *sport, *dport;
5905 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
5906 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
5907 ipseclog((LOG_DEBUG, "%s: invalid message.\n",
5909 return key_senderror(so, m, EINVAL);
5912 sport = (struct sadb_x_nat_t_port *)
5913 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5914 dport = (struct sadb_x_nat_t_port *)
5915 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5918 KEY_PORTTOSADDR(&saidx.src,
5919 sport->sadb_x_nat_t_port_port);
5921 KEY_PORTTOSADDR(&saidx.dst,
5922 dport->sadb_x_nat_t_port_port);
5926 /* get a SA header */
5928 LIST_FOREACH(sah, &V_sahtree, chain) {
5929 if (sah->state == SADB_SASTATE_DEAD)
5931 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5934 /* get a SA with SPI. */
5935 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5941 ipseclog((LOG_DEBUG, "%s: no SA found.\n", __func__));
5942 return key_senderror(so, m, ENOENT);
5949 /* map proto to satype */
5950 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5951 ipseclog((LOG_DEBUG, "%s: there was invalid proto in SAD.\n",
5953 return key_senderror(so, m, EINVAL);
5956 /* create new sadb_msg to reply. */
5957 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5958 mhp->msg->sadb_msg_pid);
5960 return key_senderror(so, m, ENOBUFS);
5963 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5967 /* XXX make it sysctl-configurable? */
5969 key_getcomb_setlifetime(comb)
5970 struct sadb_comb *comb;
5973 comb->sadb_comb_soft_allocations = 1;
5974 comb->sadb_comb_hard_allocations = 1;
5975 comb->sadb_comb_soft_bytes = 0;
5976 comb->sadb_comb_hard_bytes = 0;
5977 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5978 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5979 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5980 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5984 * XXX reorder combinations by preference
5985 * XXX no idea if the user wants ESP authentication or not
5987 static struct mbuf *
5990 struct sadb_comb *comb;
5991 struct enc_xform *algo;
5992 struct mbuf *result = NULL, *m, *n;
5996 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5999 for (i = 1; i <= SADB_EALG_MAX; i++) {
6000 algo = esp_algorithm_lookup(i);
6004 /* discard algorithms with key size smaller than system min */
6005 if (_BITS(algo->maxkey) < V_ipsec_esp_keymin)
6007 if (_BITS(algo->minkey) < V_ipsec_esp_keymin)
6008 encmin = V_ipsec_esp_keymin;
6010 encmin = _BITS(algo->minkey);
6012 if (V_ipsec_esp_auth)
6013 m = key_getcomb_ah();
6015 IPSEC_ASSERT(l <= MLEN,
6016 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6017 MGET(m, M_NOWAIT, MT_DATA);
6022 bzero(mtod(m, caddr_t), m->m_len);
6029 for (n = m; n; n = n->m_next)
6031 IPSEC_ASSERT((totlen % l) == 0, ("totlen=%u, l=%u", totlen, l));
6033 for (off = 0; off < totlen; off += l) {
6034 n = m_pulldown(m, off, l, &o);
6036 /* m is already freed */
6039 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
6040 bzero(comb, sizeof(*comb));
6041 key_getcomb_setlifetime(comb);
6042 comb->sadb_comb_encrypt = i;
6043 comb->sadb_comb_encrypt_minbits = encmin;
6044 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey);
6063 const struct auth_hash *ah,
6069 *min = *max = ah->keysize;
6070 if (ah->keysize == 0) {
6072 * Transform takes arbitrary key size but algorithm
6073 * key size is restricted. Enforce this here.
6076 case SADB_X_AALG_MD5: *min = *max = 16; break;
6077 case SADB_X_AALG_SHA: *min = *max = 20; break;
6078 case SADB_X_AALG_NULL: *min = 1; *max = 256; break;
6079 case SADB_X_AALG_SHA2_256: *min = *max = 32; break;
6080 case SADB_X_AALG_SHA2_384: *min = *max = 48; break;
6081 case SADB_X_AALG_SHA2_512: *min = *max = 64; break;
6083 DPRINTF(("%s: unknown AH algorithm %u\n",
6091 * XXX reorder combinations by preference
6093 static struct mbuf *
6096 struct sadb_comb *comb;
6097 struct auth_hash *algo;
6099 u_int16_t minkeysize, maxkeysize;
6101 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6104 for (i = 1; i <= SADB_AALG_MAX; i++) {
6106 /* we prefer HMAC algorithms, not old algorithms */
6107 if (i != SADB_AALG_SHA1HMAC &&
6108 i != SADB_AALG_MD5HMAC &&
6109 i != SADB_X_AALG_SHA2_256 &&
6110 i != SADB_X_AALG_SHA2_384 &&
6111 i != SADB_X_AALG_SHA2_512)
6114 algo = ah_algorithm_lookup(i);
6117 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize);
6118 /* discard algorithms with key size smaller than system min */
6119 if (_BITS(minkeysize) < V_ipsec_ah_keymin)
6123 IPSEC_ASSERT(l <= MLEN,
6124 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6125 MGET(m, M_NOWAIT, MT_DATA);
6132 M_PREPEND(m, l, M_NOWAIT);
6136 comb = mtod(m, struct sadb_comb *);
6137 bzero(comb, sizeof(*comb));
6138 key_getcomb_setlifetime(comb);
6139 comb->sadb_comb_auth = i;
6140 comb->sadb_comb_auth_minbits = _BITS(minkeysize);
6141 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize);
6148 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
6149 * XXX reorder combinations by preference
6151 static struct mbuf *
6152 key_getcomb_ipcomp()
6154 struct sadb_comb *comb;
6155 struct comp_algo *algo;
6158 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6161 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
6162 algo = ipcomp_algorithm_lookup(i);
6167 IPSEC_ASSERT(l <= MLEN,
6168 ("l=%u > MLEN=%lu", l, (u_long) MLEN));
6169 MGET(m, M_NOWAIT, MT_DATA);
6176 M_PREPEND(m, l, M_NOWAIT);
6180 comb = mtod(m, struct sadb_comb *);
6181 bzero(comb, sizeof(*comb));
6182 key_getcomb_setlifetime(comb);
6183 comb->sadb_comb_encrypt = i;
6184 /* what should we set into sadb_comb_*_{min,max}bits? */
6191 * XXX no way to pass mode (transport/tunnel) to userland
6192 * XXX replay checking?
6193 * XXX sysctl interface to ipsec_{ah,esp}_keymin
6195 static struct mbuf *
6197 const struct secasindex *saidx;
6199 struct sadb_prop *prop;
6201 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
6204 switch (saidx->proto) {
6206 m = key_getcomb_esp();
6209 m = key_getcomb_ah();
6211 case IPPROTO_IPCOMP:
6212 m = key_getcomb_ipcomp();
6220 M_PREPEND(m, l, M_NOWAIT);
6225 for (n = m; n; n = n->m_next)
6228 prop = mtod(m, struct sadb_prop *);
6229 bzero(prop, sizeof(*prop));
6230 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
6231 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
6232 prop->sadb_prop_replay = 32; /* XXX */
6238 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
6240 * <base, SA, address(SD), (address(P)), x_policy,
6241 * (identity(SD),) (sensitivity,) proposal>
6242 * to KMD, and expect to receive
6243 * <base> with SADB_ACQUIRE if error occured,
6245 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
6246 * from KMD by PF_KEY.
6248 * XXX x_policy is outside of RFC2367 (KAME extension).
6249 * XXX sensitivity is not supported.
6250 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
6251 * see comment for key_getcomb_ipcomp().
6255 * others: error number
6258 key_acquire(const struct secasindex *saidx, struct secpolicy *sp)
6260 struct mbuf *result = NULL, *m;
6261 struct secacq *newacq;
6266 IPSEC_ASSERT(saidx != NULL, ("null saidx"));
6267 satype = key_proto2satype(saidx->proto);
6268 IPSEC_ASSERT(satype != 0, ("null satype, protocol %u", saidx->proto));
6271 * We never do anything about acquirng SA. There is anather
6272 * solution that kernel blocks to send SADB_ACQUIRE message until
6273 * getting something message from IKEd. In later case, to be
6274 * managed with ACQUIRING list.
6276 /* Get an entry to check whether sending message or not. */
6277 if ((newacq = key_getacq(saidx)) != NULL) {
6278 if (V_key_blockacq_count < newacq->count) {
6279 /* reset counter and do send message. */
6282 /* increment counter and do nothing. */
6287 /* make new entry for blocking to send SADB_ACQUIRE. */
6288 if ((newacq = key_newacq(saidx)) == NULL)
6294 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
6302 * No SADB_X_EXT_NAT_T_* here: we do not know
6303 * anything related to NAT-T at this time.
6306 /* set sadb_address for saidx's. */
6307 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6308 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY);
6315 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6316 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY);
6323 /* XXX proxy address (optional) */
6325 /* set sadb_x_policy */
6327 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
6335 /* XXX identity (optional) */
6337 if (idexttype && fqdn) {
6338 /* create identity extension (FQDN) */
6339 struct sadb_ident *id;
6342 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
6343 id = (struct sadb_ident *)p;
6344 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6345 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6346 id->sadb_ident_exttype = idexttype;
6347 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
6348 bcopy(fqdn, id + 1, fqdnlen);
6349 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
6353 /* create identity extension (USERFQDN) */
6354 struct sadb_ident *id;
6358 /* +1 for terminating-NUL */
6359 userfqdnlen = strlen(userfqdn) + 1;
6362 id = (struct sadb_ident *)p;
6363 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6364 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6365 id->sadb_ident_exttype = idexttype;
6366 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
6367 /* XXX is it correct? */
6368 if (curproc && curproc->p_cred)
6369 id->sadb_ident_id = curproc->p_cred->p_ruid;
6370 if (userfqdn && userfqdnlen)
6371 bcopy(userfqdn, id + 1, userfqdnlen);
6372 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
6376 /* XXX sensitivity (optional) */
6378 /* create proposal/combination extension */
6379 m = key_getprop(saidx);
6382 * spec conformant: always attach proposal/combination extension,
6383 * the problem is that we have no way to attach it for ipcomp,
6384 * due to the way sadb_comb is declared in RFC2367.
6393 * outside of spec; make proposal/combination extension optional.
6399 if ((result->m_flags & M_PKTHDR) == 0) {
6404 if (result->m_len < sizeof(struct sadb_msg)) {
6405 result = m_pullup(result, sizeof(struct sadb_msg));
6406 if (result == NULL) {
6412 result->m_pkthdr.len = 0;
6413 for (m = result; m; m = m->m_next)
6414 result->m_pkthdr.len += m->m_len;
6416 mtod(result, struct sadb_msg *)->sadb_msg_len =
6417 PFKEY_UNIT64(result->m_pkthdr.len);
6419 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6427 static struct secacq *
6428 key_newacq(const struct secasindex *saidx)
6430 struct secacq *newacq;
6433 newacq = malloc(sizeof(struct secacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO);
6434 if (newacq == NULL) {
6435 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6440 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
6441 newacq->seq = (V_acq_seq == ~0 ? 1 : ++V_acq_seq);
6442 newacq->created = time_second;
6445 /* add to acqtree */
6447 LIST_INSERT_HEAD(&V_acqtree, newacq, chain);
6453 static struct secacq *
6454 key_getacq(const struct secasindex *saidx)
6459 LIST_FOREACH(acq, &V_acqtree, chain) {
6460 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
6468 static struct secacq *
6469 key_getacqbyseq(seq)
6475 LIST_FOREACH(acq, &V_acqtree, chain) {
6476 if (acq->seq == seq)
6484 static struct secspacq *
6486 struct secpolicyindex *spidx;
6488 struct secspacq *acq;
6491 acq = malloc(sizeof(struct secspacq), M_IPSEC_SAQ, M_NOWAIT|M_ZERO);
6493 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6498 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
6499 acq->created = time_second;
6502 /* add to spacqtree */
6504 LIST_INSERT_HEAD(&V_spacqtree, acq, chain);
6510 static struct secspacq *
6512 struct secpolicyindex *spidx;
6514 struct secspacq *acq;
6517 LIST_FOREACH(acq, &V_spacqtree, chain) {
6518 if (key_cmpspidx_exactly(spidx, &acq->spidx)) {
6519 /* NB: return holding spacq_lock */
6529 * SADB_ACQUIRE processing,
6530 * in first situation, is receiving
6532 * from the ikmpd, and clear sequence of its secasvar entry.
6534 * In second situation, is receiving
6535 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6536 * from a user land process, and return
6537 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6540 * m will always be freed.
6543 key_acquire2(so, m, mhp)
6546 const struct sadb_msghdr *mhp;
6548 const struct sadb_address *src0, *dst0;
6549 struct secasindex saidx;
6550 struct secashead *sah;
6554 IPSEC_ASSERT(so != NULL, ("null socket"));
6555 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6556 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6557 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6560 * Error message from KMd.
6561 * We assume that if error was occured in IKEd, the length of PFKEY
6562 * message is equal to the size of sadb_msg structure.
6563 * We do not raise error even if error occured in this function.
6565 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
6568 /* check sequence number */
6569 if (mhp->msg->sadb_msg_seq == 0) {
6570 ipseclog((LOG_DEBUG, "%s: must specify sequence "
6571 "number.\n", __func__));
6576 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
6578 * the specified larval SA is already gone, or we got
6579 * a bogus sequence number. we can silently ignore it.
6585 /* reset acq counter in order to deletion by timehander. */
6586 acq->created = time_second;
6593 * This message is from user land.
6596 /* map satype to proto */
6597 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6598 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
6600 return key_senderror(so, m, EINVAL);
6603 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6604 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6605 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
6607 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
6609 return key_senderror(so, m, EINVAL);
6611 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6612 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
6613 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
6615 ipseclog((LOG_DEBUG, "%s: invalid message is passed.\n",
6617 return key_senderror(so, m, EINVAL);
6620 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6621 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6623 /* XXX boundary check against sa_len */
6624 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6627 * Make sure the port numbers are zero.
6628 * In case of NAT-T we will update them later if needed.
6630 KEY_PORTTOSADDR(&saidx.src, 0);
6631 KEY_PORTTOSADDR(&saidx.dst, 0);
6635 * Handle NAT-T info if present.
6638 if (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL &&
6639 mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL) {
6640 struct sadb_x_nat_t_port *sport, *dport;
6642 if (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport) ||
6643 mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport)) {
6644 ipseclog((LOG_DEBUG, "%s: invalid message.\n",
6646 return key_senderror(so, m, EINVAL);
6649 sport = (struct sadb_x_nat_t_port *)
6650 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
6651 dport = (struct sadb_x_nat_t_port *)
6652 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
6655 KEY_PORTTOSADDR(&saidx.src,
6656 sport->sadb_x_nat_t_port_port);
6658 KEY_PORTTOSADDR(&saidx.dst,
6659 dport->sadb_x_nat_t_port_port);
6663 /* get a SA index */
6665 LIST_FOREACH(sah, &V_sahtree, chain) {
6666 if (sah->state == SADB_SASTATE_DEAD)
6668 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6673 ipseclog((LOG_DEBUG, "%s: a SA exists already.\n", __func__));
6674 return key_senderror(so, m, EEXIST);
6677 error = key_acquire(&saidx, NULL);
6679 ipseclog((LOG_DEBUG, "%s: error %d returned from key_acquire\n",
6680 __func__, mhp->msg->sadb_msg_errno));
6681 return key_senderror(so, m, error);
6684 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6688 * SADB_REGISTER processing.
6689 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6692 * from the ikmpd, and register a socket to send PF_KEY messages,
6696 * If socket is detached, must free from regnode.
6698 * m will always be freed.
6701 key_register(so, m, mhp)
6704 const struct sadb_msghdr *mhp;
6706 struct secreg *reg, *newreg = 0;
6708 IPSEC_ASSERT(so != NULL, ("null socket"));
6709 IPSEC_ASSERT(m != NULL, ("null mbuf"));
6710 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
6711 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
6713 /* check for invalid register message */
6714 if (mhp->msg->sadb_msg_satype >= sizeof(V_regtree)/sizeof(V_regtree[0]))
6715 return key_senderror(so, m, EINVAL);
6717 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6718 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6721 /* check whether existing or not */
6723 LIST_FOREACH(reg, &V_regtree[mhp->msg->sadb_msg_satype], chain) {
6724 if (reg->so == so) {
6726 ipseclog((LOG_DEBUG, "%s: socket exists already.\n",
6728 return key_senderror(so, m, EEXIST);
6732 /* create regnode */
6733 newreg = malloc(sizeof(struct secreg), M_IPSEC_SAR, M_NOWAIT|M_ZERO);
6734 if (newreg == NULL) {
6736 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
6737 return key_senderror(so, m, ENOBUFS);
6741 ((struct keycb *)sotorawcb(so))->kp_registered++;
6743 /* add regnode to regtree. */
6744 LIST_INSERT_HEAD(&V_regtree[mhp->msg->sadb_msg_satype], newreg, chain);
6750 struct sadb_msg *newmsg;
6751 struct sadb_supported *sup;
6752 u_int len, alen, elen;
6755 struct sadb_alg *alg;
6757 /* create new sadb_msg to reply. */
6759 for (i = 1; i <= SADB_AALG_MAX; i++) {
6760 if (ah_algorithm_lookup(i))
6761 alen += sizeof(struct sadb_alg);
6764 alen += sizeof(struct sadb_supported);
6766 for (i = 1; i <= SADB_EALG_MAX; i++) {
6767 if (esp_algorithm_lookup(i))
6768 elen += sizeof(struct sadb_alg);
6771 elen += sizeof(struct sadb_supported);
6773 len = sizeof(struct sadb_msg) + alen + elen;
6776 return key_senderror(so, m, ENOBUFS);
6778 MGETHDR(n, M_NOWAIT, MT_DATA);
6780 MCLGET(n, M_NOWAIT);
6781 if ((n->m_flags & M_EXT) == 0) {
6787 return key_senderror(so, m, ENOBUFS);
6789 n->m_pkthdr.len = n->m_len = len;
6793 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6794 newmsg = mtod(n, struct sadb_msg *);
6795 newmsg->sadb_msg_errno = 0;
6796 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6797 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6799 /* for authentication algorithm */
6801 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6802 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6803 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6804 off += PFKEY_ALIGN8(sizeof(*sup));
6806 for (i = 1; i <= SADB_AALG_MAX; i++) {
6807 struct auth_hash *aalgo;
6808 u_int16_t minkeysize, maxkeysize;
6810 aalgo = ah_algorithm_lookup(i);
6813 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6814 alg->sadb_alg_id = i;
6815 alg->sadb_alg_ivlen = 0;
6816 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize);
6817 alg->sadb_alg_minbits = _BITS(minkeysize);
6818 alg->sadb_alg_maxbits = _BITS(maxkeysize);
6819 off += PFKEY_ALIGN8(sizeof(*alg));
6823 /* for encryption algorithm */
6825 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6826 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6827 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6828 off += PFKEY_ALIGN8(sizeof(*sup));
6830 for (i = 1; i <= SADB_EALG_MAX; i++) {
6831 struct enc_xform *ealgo;
6833 ealgo = esp_algorithm_lookup(i);
6836 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6837 alg->sadb_alg_id = i;
6838 alg->sadb_alg_ivlen = ealgo->blocksize;
6839 alg->sadb_alg_minbits = _BITS(ealgo->minkey);
6840 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey);
6841 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6845 IPSEC_ASSERT(off == len,
6846 ("length assumption failed (off %u len %u)", off, len));
6849 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6854 * free secreg entry registered.
6855 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6858 key_freereg(struct socket *so)
6863 IPSEC_ASSERT(so != NULL, ("NULL so"));
6866 * check whether existing or not.
6867 * check all type of SA, because there is a potential that
6868 * one socket is registered to multiple type of SA.
6871 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6872 LIST_FOREACH(reg, &V_regtree[i], chain) {
6873 if (reg->so == so && __LIST_CHAINED(reg)) {
6874 LIST_REMOVE(reg, chain);
6875 free(reg, M_IPSEC_SAR);
6884 * SADB_EXPIRE processing
6886 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6888 * NOTE: We send only soft lifetime extension.
6891 * others : error number
6894 key_expire(struct secasvar *sav)
6897 struct mbuf *result = NULL, *m;
6900 struct sadb_lifetime *lt;
6902 IPSEC_ASSERT (sav != NULL, ("null sav"));
6903 IPSEC_ASSERT (sav->sah != NULL, ("null sa header"));
6905 /* set msg header */
6906 satype = key_proto2satype(sav->sah->saidx.proto);
6907 IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype));
6908 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6915 /* create SA extension */
6916 m = key_setsadbsa(sav);
6923 /* create SA extension */
6924 m = key_setsadbxsa2(sav->sah->saidx.mode,
6925 sav->replay ? sav->replay->count : 0,
6926 sav->sah->saidx.reqid);
6933 /* create lifetime extension (current and soft) */
6934 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6935 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
6942 bzero(mtod(m, caddr_t), len);
6943 lt = mtod(m, struct sadb_lifetime *);
6944 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6945 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6946 lt->sadb_lifetime_allocations = sav->lft_c->allocations;
6947 lt->sadb_lifetime_bytes = sav->lft_c->bytes;
6948 lt->sadb_lifetime_addtime = sav->lft_c->addtime;
6949 lt->sadb_lifetime_usetime = sav->lft_c->usetime;
6950 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
6951 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6952 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_SOFT;
6953 lt->sadb_lifetime_allocations = sav->lft_s->allocations;
6954 lt->sadb_lifetime_bytes = sav->lft_s->bytes;
6955 lt->sadb_lifetime_addtime = sav->lft_s->addtime;
6956 lt->sadb_lifetime_usetime = sav->lft_s->usetime;
6959 /* set sadb_address for source */
6960 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6961 &sav->sah->saidx.src.sa,
6962 FULLMASK, IPSEC_ULPROTO_ANY);
6969 /* set sadb_address for destination */
6970 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6971 &sav->sah->saidx.dst.sa,
6972 FULLMASK, IPSEC_ULPROTO_ANY);
6980 * XXX-BZ Handle NAT-T extensions here.
6983 if ((result->m_flags & M_PKTHDR) == 0) {
6988 if (result->m_len < sizeof(struct sadb_msg)) {
6989 result = m_pullup(result, sizeof(struct sadb_msg));
6990 if (result == NULL) {
6996 result->m_pkthdr.len = 0;
6997 for (m = result; m; m = m->m_next)
6998 result->m_pkthdr.len += m->m_len;
7000 mtod(result, struct sadb_msg *)->sadb_msg_len =
7001 PFKEY_UNIT64(result->m_pkthdr.len);
7003 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
7012 * SADB_FLUSH processing
7015 * from the ikmpd, and free all entries in secastree.
7019 * NOTE: to do is only marking SADB_SASTATE_DEAD.
7021 * m will always be freed.
7024 key_flush(so, m, mhp)
7027 const struct sadb_msghdr *mhp;
7029 struct sadb_msg *newmsg;
7030 struct secashead *sah, *nextsah;
7031 struct secasvar *sav, *nextsav;
7036 IPSEC_ASSERT(so != NULL, ("null socket"));
7037 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7038 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7040 /* map satype to proto */
7041 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7042 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7044 return key_senderror(so, m, EINVAL);
7047 /* no SATYPE specified, i.e. flushing all SA. */
7049 for (sah = LIST_FIRST(&V_sahtree);
7052 nextsah = LIST_NEXT(sah, chain);
7054 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
7055 && proto != sah->saidx.proto)
7059 stateidx < _ARRAYLEN(saorder_state_alive);
7061 state = saorder_state_any[stateidx];
7062 for (sav = LIST_FIRST(&sah->savtree[state]);
7066 nextsav = LIST_NEXT(sav, chain);
7068 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
7073 sah->state = SADB_SASTATE_DEAD;
7077 if (m->m_len < sizeof(struct sadb_msg) ||
7078 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
7079 ipseclog((LOG_DEBUG, "%s: No more memory.\n", __func__));
7080 return key_senderror(so, m, ENOBUFS);
7086 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
7087 newmsg = mtod(m, struct sadb_msg *);
7088 newmsg->sadb_msg_errno = 0;
7089 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
7091 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7095 * SADB_DUMP processing
7096 * dump all entries including status of DEAD in SAD.
7099 * from the ikmpd, and dump all secasvar leaves
7104 * m will always be freed.
7107 key_dump(so, m, mhp)
7110 const struct sadb_msghdr *mhp;
7112 struct secashead *sah;
7113 struct secasvar *sav;
7119 struct sadb_msg *newmsg;
7122 IPSEC_ASSERT(so != NULL, ("null socket"));
7123 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7124 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7125 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7127 /* map satype to proto */
7128 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
7129 ipseclog((LOG_DEBUG, "%s: invalid satype is passed.\n",
7131 return key_senderror(so, m, EINVAL);
7134 /* count sav entries to be sent to the userland. */
7137 LIST_FOREACH(sah, &V_sahtree, chain) {
7138 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
7139 && proto != sah->saidx.proto)
7143 stateidx < _ARRAYLEN(saorder_state_any);
7145 state = saorder_state_any[stateidx];
7146 LIST_FOREACH(sav, &sah->savtree[state], chain) {
7154 return key_senderror(so, m, ENOENT);
7157 /* send this to the userland, one at a time. */
7159 LIST_FOREACH(sah, &V_sahtree, chain) {
7160 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
7161 && proto != sah->saidx.proto)
7164 /* map proto to satype */
7165 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
7167 ipseclog((LOG_DEBUG, "%s: there was invalid proto in "
7168 "SAD.\n", __func__));
7169 return key_senderror(so, m, EINVAL);
7173 stateidx < _ARRAYLEN(saorder_state_any);
7175 state = saorder_state_any[stateidx];
7176 LIST_FOREACH(sav, &sah->savtree[state], chain) {
7177 n = key_setdumpsa(sav, SADB_DUMP, satype,
7178 --cnt, mhp->msg->sadb_msg_pid);
7181 return key_senderror(so, m, ENOBUFS);
7183 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
7194 * SADB_X_PROMISC processing
7196 * m will always be freed.
7199 key_promisc(so, m, mhp)
7202 const struct sadb_msghdr *mhp;
7206 IPSEC_ASSERT(so != NULL, ("null socket"));
7207 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7208 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7209 IPSEC_ASSERT(mhp->msg != NULL, ("null msg"));
7211 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7213 if (olen < sizeof(struct sadb_msg)) {
7215 return key_senderror(so, m, EINVAL);
7220 } else if (olen == sizeof(struct sadb_msg)) {
7221 /* enable/disable promisc mode */
7224 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
7225 return key_senderror(so, m, EINVAL);
7226 mhp->msg->sadb_msg_errno = 0;
7227 switch (mhp->msg->sadb_msg_satype) {
7230 kp->kp_promisc = mhp->msg->sadb_msg_satype;
7233 return key_senderror(so, m, EINVAL);
7236 /* send the original message back to everyone */
7237 mhp->msg->sadb_msg_errno = 0;
7238 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7240 /* send packet as is */
7242 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
7244 /* TODO: if sadb_msg_seq is specified, send to specific pid */
7245 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7249 static int (*key_typesw[]) __P((struct socket *, struct mbuf *,
7250 const struct sadb_msghdr *)) = {
7251 NULL, /* SADB_RESERVED */
7252 key_getspi, /* SADB_GETSPI */
7253 key_update, /* SADB_UPDATE */
7254 key_add, /* SADB_ADD */
7255 key_delete, /* SADB_DELETE */
7256 key_get, /* SADB_GET */
7257 key_acquire2, /* SADB_ACQUIRE */
7258 key_register, /* SADB_REGISTER */
7259 NULL, /* SADB_EXPIRE */
7260 key_flush, /* SADB_FLUSH */
7261 key_dump, /* SADB_DUMP */
7262 key_promisc, /* SADB_X_PROMISC */
7263 NULL, /* SADB_X_PCHANGE */
7264 key_spdadd, /* SADB_X_SPDUPDATE */
7265 key_spdadd, /* SADB_X_SPDADD */
7266 key_spddelete, /* SADB_X_SPDDELETE */
7267 key_spdget, /* SADB_X_SPDGET */
7268 NULL, /* SADB_X_SPDACQUIRE */
7269 key_spddump, /* SADB_X_SPDDUMP */
7270 key_spdflush, /* SADB_X_SPDFLUSH */
7271 key_spdadd, /* SADB_X_SPDSETIDX */
7272 NULL, /* SADB_X_SPDEXPIRE */
7273 key_spddelete2, /* SADB_X_SPDDELETE2 */
7277 * parse sadb_msg buffer to process PFKEYv2,
7278 * and create a data to response if needed.
7279 * I think to be dealed with mbuf directly.
7281 * msgp : pointer to pointer to a received buffer pulluped.
7282 * This is rewrited to response.
7283 * so : pointer to socket.
7285 * length for buffer to send to user process.
7292 struct sadb_msg *msg;
7293 struct sadb_msghdr mh;
7298 IPSEC_ASSERT(so != NULL, ("null socket"));
7299 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7301 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
7302 KEYDEBUG(KEYDEBUG_KEY_DUMP,
7303 ipseclog((LOG_DEBUG, "%s: passed sadb_msg\n", __func__));
7307 if (m->m_len < sizeof(struct sadb_msg)) {
7308 m = m_pullup(m, sizeof(struct sadb_msg));
7312 msg = mtod(m, struct sadb_msg *);
7313 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
7314 target = KEY_SENDUP_ONE;
7316 if ((m->m_flags & M_PKTHDR) == 0 ||
7317 m->m_pkthdr.len != m->m_pkthdr.len) {
7318 ipseclog((LOG_DEBUG, "%s: invalid message length.\n",__func__));
7319 PFKEYSTAT_INC(out_invlen);
7324 if (msg->sadb_msg_version != PF_KEY_V2) {
7325 ipseclog((LOG_DEBUG, "%s: PF_KEY version %u is mismatched.\n",
7326 __func__, msg->sadb_msg_version));
7327 PFKEYSTAT_INC(out_invver);
7332 if (msg->sadb_msg_type > SADB_MAX) {
7333 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
7334 __func__, msg->sadb_msg_type));
7335 PFKEYSTAT_INC(out_invmsgtype);
7340 /* for old-fashioned code - should be nuked */
7341 if (m->m_pkthdr.len > MCLBYTES) {
7348 MGETHDR(n, M_NOWAIT, MT_DATA);
7349 if (n && m->m_pkthdr.len > MHLEN) {
7350 MCLGET(n, M_NOWAIT);
7351 if ((n->m_flags & M_EXT) == 0) {
7360 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
7361 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
7367 /* align the mbuf chain so that extensions are in contiguous region. */
7368 error = key_align(m, &mh);
7375 switch (msg->sadb_msg_satype) {
7376 case SADB_SATYPE_UNSPEC:
7377 switch (msg->sadb_msg_type) {
7385 ipseclog((LOG_DEBUG, "%s: must specify satype "
7386 "when msg type=%u.\n", __func__,
7387 msg->sadb_msg_type));
7388 PFKEYSTAT_INC(out_invsatype);
7393 case SADB_SATYPE_AH:
7394 case SADB_SATYPE_ESP:
7395 case SADB_X_SATYPE_IPCOMP:
7396 case SADB_X_SATYPE_TCPSIGNATURE:
7397 switch (msg->sadb_msg_type) {
7399 case SADB_X_SPDDELETE:
7401 case SADB_X_SPDDUMP:
7402 case SADB_X_SPDFLUSH:
7403 case SADB_X_SPDSETIDX:
7404 case SADB_X_SPDUPDATE:
7405 case SADB_X_SPDDELETE2:
7406 ipseclog((LOG_DEBUG, "%s: illegal satype=%u\n",
7407 __func__, msg->sadb_msg_type));
7408 PFKEYSTAT_INC(out_invsatype);
7413 case SADB_SATYPE_RSVP:
7414 case SADB_SATYPE_OSPFV2:
7415 case SADB_SATYPE_RIPV2:
7416 case SADB_SATYPE_MIP:
7417 ipseclog((LOG_DEBUG, "%s: type %u isn't supported.\n",
7418 __func__, msg->sadb_msg_satype));
7419 PFKEYSTAT_INC(out_invsatype);
7422 case 1: /* XXX: What does it do? */
7423 if (msg->sadb_msg_type == SADB_X_PROMISC)
7427 ipseclog((LOG_DEBUG, "%s: invalid type %u is passed.\n",
7428 __func__, msg->sadb_msg_satype));
7429 PFKEYSTAT_INC(out_invsatype);
7434 /* check field of upper layer protocol and address family */
7435 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
7436 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
7437 struct sadb_address *src0, *dst0;
7440 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
7441 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
7443 /* check upper layer protocol */
7444 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
7445 ipseclog((LOG_DEBUG, "%s: upper layer protocol "
7446 "mismatched.\n", __func__));
7447 PFKEYSTAT_INC(out_invaddr);
7453 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
7454 PFKEY_ADDR_SADDR(dst0)->sa_family) {
7455 ipseclog((LOG_DEBUG, "%s: address family mismatched.\n",
7457 PFKEYSTAT_INC(out_invaddr);
7461 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7462 PFKEY_ADDR_SADDR(dst0)->sa_len) {
7463 ipseclog((LOG_DEBUG, "%s: address struct size "
7464 "mismatched.\n", __func__));
7465 PFKEYSTAT_INC(out_invaddr);
7470 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7472 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7473 sizeof(struct sockaddr_in)) {
7474 PFKEYSTAT_INC(out_invaddr);
7480 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7481 sizeof(struct sockaddr_in6)) {
7482 PFKEYSTAT_INC(out_invaddr);
7488 ipseclog((LOG_DEBUG, "%s: unsupported address family\n",
7490 PFKEYSTAT_INC(out_invaddr);
7491 error = EAFNOSUPPORT;
7495 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7497 plen = sizeof(struct in_addr) << 3;
7500 plen = sizeof(struct in6_addr) << 3;
7503 plen = 0; /*fool gcc*/
7507 /* check max prefix length */
7508 if (src0->sadb_address_prefixlen > plen ||
7509 dst0->sadb_address_prefixlen > plen) {
7510 ipseclog((LOG_DEBUG, "%s: illegal prefixlen.\n",
7512 PFKEYSTAT_INC(out_invaddr);
7518 * prefixlen == 0 is valid because there can be a case when
7519 * all addresses are matched.
7523 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
7524 key_typesw[msg->sadb_msg_type] == NULL) {
7525 PFKEYSTAT_INC(out_invmsgtype);
7530 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
7533 msg->sadb_msg_errno = error;
7534 return key_sendup_mbuf(so, m, target);
7538 key_senderror(so, m, code)
7543 struct sadb_msg *msg;
7545 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
7546 ("mbuf too small, len %u", m->m_len));
7548 msg = mtod(m, struct sadb_msg *);
7549 msg->sadb_msg_errno = code;
7550 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
7554 * set the pointer to each header into message buffer.
7555 * m will be freed on error.
7556 * XXX larger-than-MCLBYTES extension?
7561 struct sadb_msghdr *mhp;
7564 struct sadb_ext *ext;
7569 IPSEC_ASSERT(m != NULL, ("null mbuf"));
7570 IPSEC_ASSERT(mhp != NULL, ("null msghdr"));
7571 IPSEC_ASSERT(m->m_len >= sizeof(struct sadb_msg),
7572 ("mbuf too small, len %u", m->m_len));
7575 bzero(mhp, sizeof(*mhp));
7577 mhp->msg = mtod(m, struct sadb_msg *);
7578 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
7580 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7581 extlen = end; /*just in case extlen is not updated*/
7582 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
7583 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
7585 /* m is already freed */
7588 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7591 switch (ext->sadb_ext_type) {
7593 case SADB_EXT_ADDRESS_SRC:
7594 case SADB_EXT_ADDRESS_DST:
7595 case SADB_EXT_ADDRESS_PROXY:
7596 case SADB_EXT_LIFETIME_CURRENT:
7597 case SADB_EXT_LIFETIME_HARD:
7598 case SADB_EXT_LIFETIME_SOFT:
7599 case SADB_EXT_KEY_AUTH:
7600 case SADB_EXT_KEY_ENCRYPT:
7601 case SADB_EXT_IDENTITY_SRC:
7602 case SADB_EXT_IDENTITY_DST:
7603 case SADB_EXT_SENSITIVITY:
7604 case SADB_EXT_PROPOSAL:
7605 case SADB_EXT_SUPPORTED_AUTH:
7606 case SADB_EXT_SUPPORTED_ENCRYPT:
7607 case SADB_EXT_SPIRANGE:
7608 case SADB_X_EXT_POLICY:
7609 case SADB_X_EXT_SA2:
7611 case SADB_X_EXT_NAT_T_TYPE:
7612 case SADB_X_EXT_NAT_T_SPORT:
7613 case SADB_X_EXT_NAT_T_DPORT:
7614 case SADB_X_EXT_NAT_T_OAI:
7615 case SADB_X_EXT_NAT_T_OAR:
7616 case SADB_X_EXT_NAT_T_FRAG:
7618 /* duplicate check */
7620 * XXX Are there duplication payloads of either
7621 * KEY_AUTH or KEY_ENCRYPT ?
7623 if (mhp->ext[ext->sadb_ext_type] != NULL) {
7624 ipseclog((LOG_DEBUG, "%s: duplicate ext_type "
7625 "%u\n", __func__, ext->sadb_ext_type));
7627 PFKEYSTAT_INC(out_dupext);
7632 ipseclog((LOG_DEBUG, "%s: invalid ext_type %u\n",
7633 __func__, ext->sadb_ext_type));
7635 PFKEYSTAT_INC(out_invexttype);
7639 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
7641 if (key_validate_ext(ext, extlen)) {
7643 PFKEYSTAT_INC(out_invlen);
7647 n = m_pulldown(m, off, extlen, &toff);
7649 /* m is already freed */
7652 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7654 mhp->ext[ext->sadb_ext_type] = ext;
7655 mhp->extoff[ext->sadb_ext_type] = off;
7656 mhp->extlen[ext->sadb_ext_type] = extlen;
7661 PFKEYSTAT_INC(out_invlen);
7669 key_validate_ext(ext, len)
7670 const struct sadb_ext *ext;
7673 const struct sockaddr *sa;
7674 enum { NONE, ADDR } checktype = NONE;
7676 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
7678 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
7681 /* if it does not match minimum/maximum length, bail */
7682 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
7683 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
7685 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
7687 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
7690 /* more checks based on sadb_ext_type XXX need more */
7691 switch (ext->sadb_ext_type) {
7692 case SADB_EXT_ADDRESS_SRC:
7693 case SADB_EXT_ADDRESS_DST:
7694 case SADB_EXT_ADDRESS_PROXY:
7695 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7698 case SADB_EXT_IDENTITY_SRC:
7699 case SADB_EXT_IDENTITY_DST:
7700 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7701 SADB_X_IDENTTYPE_ADDR) {
7702 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7712 switch (checktype) {
7716 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen);
7717 if (len < baselen + sal)
7719 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7732 for (i = 0; i < IPSEC_DIR_MAX; i++)
7733 LIST_INIT(&V_sptree[i]);
7735 LIST_INIT(&V_sahtree);
7737 for (i = 0; i <= SADB_SATYPE_MAX; i++)
7738 LIST_INIT(&V_regtree[i]);
7740 LIST_INIT(&V_acqtree);
7741 LIST_INIT(&V_spacqtree);
7743 /* system default */
7744 V_ip4_def_policy.policy = IPSEC_POLICY_NONE;
7745 V_ip4_def_policy.refcnt++; /*never reclaim this*/
7747 if (!IS_DEFAULT_VNET(curvnet))
7751 REGTREE_LOCK_INIT();
7752 SAHTREE_LOCK_INIT();
7756 #ifndef IPSEC_DEBUG2
7757 callout_init(&key_timer, CALLOUT_MPSAFE);
7758 callout_reset(&key_timer, hz, key_timehandler, NULL);
7759 #endif /*IPSEC_DEBUG2*/
7761 /* initialize key statistics */
7762 keystat.getspi_count = 1;
7764 printf("IPsec: Initialized Security Association Processing.\n");
7771 struct secpolicy *sp, *nextsp;
7772 struct secacq *acq, *nextacq;
7773 struct secspacq *spacq, *nextspacq;
7774 struct secashead *sah, *nextsah;
7779 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7780 for (sp = LIST_FIRST(&V_sptree[i]);
7781 sp != NULL; sp = nextsp) {
7782 nextsp = LIST_NEXT(sp, chain);
7783 if (__LIST_CHAINED(sp)) {
7784 LIST_REMOVE(sp, chain);
7785 free(sp, M_IPSEC_SP);
7792 for (sah = LIST_FIRST(&V_sahtree); sah != NULL; sah = nextsah) {
7793 nextsah = LIST_NEXT(sah, chain);
7794 if (__LIST_CHAINED(sah)) {
7795 LIST_REMOVE(sah, chain);
7796 free(sah, M_IPSEC_SAH);
7802 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7803 LIST_FOREACH(reg, &V_regtree[i], chain) {
7804 if (__LIST_CHAINED(reg)) {
7805 LIST_REMOVE(reg, chain);
7806 free(reg, M_IPSEC_SAR);
7814 for (acq = LIST_FIRST(&V_acqtree); acq != NULL; acq = nextacq) {
7815 nextacq = LIST_NEXT(acq, chain);
7816 if (__LIST_CHAINED(acq)) {
7817 LIST_REMOVE(acq, chain);
7818 free(acq, M_IPSEC_SAQ);
7824 for (spacq = LIST_FIRST(&V_spacqtree); spacq != NULL;
7825 spacq = nextspacq) {
7826 nextspacq = LIST_NEXT(spacq, chain);
7827 if (__LIST_CHAINED(spacq)) {
7828 LIST_REMOVE(spacq, chain);
7829 free(spacq, M_IPSEC_SAQ);
7837 * XXX: maybe This function is called after INBOUND IPsec processing.
7839 * Special check for tunnel-mode packets.
7840 * We must make some checks for consistency between inner and outer IP header.
7842 * xxx more checks to be provided
7845 key_checktunnelsanity(sav, family, src, dst)
7846 struct secasvar *sav;
7851 IPSEC_ASSERT(sav->sah != NULL, ("null SA header"));
7853 /* XXX: check inner IP header */
7858 /* record data transfer on SA, and update timestamps */
7860 key_sa_recordxfer(sav, m)
7861 struct secasvar *sav;
7864 IPSEC_ASSERT(sav != NULL, ("Null secasvar"));
7865 IPSEC_ASSERT(m != NULL, ("Null mbuf"));
7870 * XXX Currently, there is a difference of bytes size
7871 * between inbound and outbound processing.
7873 sav->lft_c->bytes += m->m_pkthdr.len;
7874 /* to check bytes lifetime is done in key_timehandler(). */
7877 * We use the number of packets as the unit of
7878 * allocations. We increment the variable
7879 * whenever {esp,ah}_{in,out}put is called.
7881 sav->lft_c->allocations++;
7882 /* XXX check for expires? */
7885 * NOTE: We record CURRENT usetime by using wall clock,
7886 * in seconds. HARD and SOFT lifetime are measured by the time
7887 * difference (again in seconds) from usetime.
7891 * -----+-----+--------+---> t
7892 * <--------------> HARD
7895 sav->lft_c->usetime = time_second;
7896 /* XXX check for expires? */
7903 key_sa_routechange(dst)
7904 struct sockaddr *dst;
7906 struct secashead *sah;
7910 LIST_FOREACH(sah, &V_sahtree, chain) {
7911 ro = &sah->route_cache.sa_route;
7912 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
7913 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
7915 ro->ro_rt = (struct rtentry *)NULL;
7922 key_sa_chgstate(struct secasvar *sav, u_int8_t state)
7924 IPSEC_ASSERT(sav != NULL, ("NULL sav"));
7925 SAHTREE_LOCK_ASSERT();
7927 if (sav->state != state) {
7928 if (__LIST_CHAINED(sav))
7929 LIST_REMOVE(sav, chain);
7931 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7937 struct secasvar *sav;
7940 IPSEC_ASSERT(sav->iv != NULL, ("null IV"));
7941 key_randomfill(sav->iv, sav->ivlen);
7945 * Take one of the kernel's security keys and convert it into a PF_KEY
7946 * structure within an mbuf, suitable for sending up to a waiting
7947 * application in user land.
7950 * src: A pointer to a kernel security key.
7951 * exttype: Which type of key this is. Refer to the PF_KEY data structures.
7953 * a valid mbuf or NULL indicating an error
7957 static struct mbuf *
7958 key_setkey(struct seckey *src, u_int16_t exttype)
7967 len = PFKEY_ALIGN8(sizeof(struct sadb_key) + _KEYLEN(src));
7968 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
7973 p = mtod(m, struct sadb_key *);
7975 p->sadb_key_len = PFKEY_UNIT64(len);
7976 p->sadb_key_exttype = exttype;
7977 p->sadb_key_bits = src->bits;
7978 bcopy(src->key_data, _KEYBUF(p), _KEYLEN(src));
7984 * Take one of the kernel's lifetime data structures and convert it
7985 * into a PF_KEY structure within an mbuf, suitable for sending up to
7986 * a waiting application in user land.
7989 * src: A pointer to a kernel lifetime structure.
7990 * exttype: Which type of lifetime this is. Refer to the PF_KEY
7991 * data structures for more information.
7993 * a valid mbuf or NULL indicating an error
7997 static struct mbuf *
7998 key_setlifetime(struct seclifetime *src, u_int16_t exttype)
8000 struct mbuf *m = NULL;
8001 struct sadb_lifetime *p;
8002 int len = PFKEY_ALIGN8(sizeof(struct sadb_lifetime));
8007 m = m_get2(len, M_NOWAIT, MT_DATA, 0);
8012 p = mtod(m, struct sadb_lifetime *);
8015 p->sadb_lifetime_len = PFKEY_UNIT64(len);
8016 p->sadb_lifetime_exttype = exttype;
8017 p->sadb_lifetime_allocations = src->allocations;
8018 p->sadb_lifetime_bytes = src->bytes;
8019 p->sadb_lifetime_addtime = src->addtime;
8020 p->sadb_lifetime_usetime = src->usetime;