1 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.1 2003/01/24 05:11:35 sam Exp $ */
2 /* $DragonFly: src/sys/netproto/ipsec/key.c,v 1.2 2003/06/17 04:28:53 dillon Exp $ */
3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * This code is referd to RFC 2367
39 #include "opt_inet6.h"
40 #include "opt_ipsec.h"
42 #include <sys/types.h>
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
47 #include <sys/domain.h>
48 #include <sys/protosw.h>
49 #include <sys/malloc.h>
50 #include <sys/socket.h>
51 #include <sys/socketvar.h>
52 #include <sys/sysctl.h>
53 #include <sys/errno.h>
55 #include <sys/queue.h>
56 #include <sys/syslog.h>
59 #include <net/route.h>
60 #include <net/raw_cb.h>
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <netinet/in_var.h>
68 #include <netinet/ip6.h>
69 #include <netinet6/in6_var.h>
70 #include <netinet6/ip6_var.h>
74 #include <netinet/in_pcb.h>
77 #include <netinet6/in6_pcb.h>
80 #include <net/pfkeyv2.h>
81 #include <netipsec/keydb.h>
82 #include <netipsec/key.h>
83 #include <netipsec/keysock.h>
84 #include <netipsec/key_debug.h>
86 #include <netipsec/ipsec.h>
88 #include <netipsec/ipsec6.h>
91 #include <netipsec/xform.h>
93 #include <machine/stdarg.h>
96 #include <sys/random.h>
98 #include <net/net_osdep.h>
100 #define FULLMASK 0xff
101 #define _BITS(bytes) ((bytes) << 3)
104 * Note on SA reference counting:
105 * - SAs that are not in DEAD state will have (total external reference + 1)
106 * following value in reference count field. they cannot be freed and are
107 * referenced from SA header.
108 * - SAs that are in DEAD state will have (total external reference)
109 * in reference count field. they are ready to be freed. reference from
110 * SA header will be removed in key_delsav(), when the reference count
111 * field hits 0 (= no external reference other than from SA header.
114 u_int32_t key_debug_level = 0;
115 static u_int key_spi_trycnt = 1000;
116 static u_int32_t key_spi_minval = 0x100;
117 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
118 static u_int32_t policy_id = 0;
119 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
120 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
121 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
122 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
123 static int key_prefered_oldsa = 1; /* prefered old sa rather than new sa.*/
125 static u_int32_t acq_seq = 0;
126 static int key_tick_init_random = 0;
128 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
129 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
130 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
132 #ifndef IPSEC_NONBLOCK_ACQUIRE
133 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
135 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
137 /* search order for SAs */
138 static u_int saorder_state_valid[] = {
139 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
141 * This order is important because we must select the oldest SA
142 * for outbound processing. For inbound, This is not important.
145 static u_int saorder_state_alive[] = {
147 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
149 static u_int saorder_state_any[] = {
150 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
151 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
154 static const int minsize[] = {
155 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
156 sizeof(struct sadb_sa), /* SADB_EXT_SA */
157 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
158 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
159 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
160 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
161 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
162 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
163 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
164 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
165 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
166 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
167 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
168 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
169 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
170 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
171 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
172 0, /* SADB_X_EXT_KMPRIVATE */
173 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
174 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
176 static const int maxsize[] = {
177 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
178 sizeof(struct sadb_sa), /* SADB_EXT_SA */
179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
180 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
181 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
182 0, /* SADB_EXT_ADDRESS_SRC */
183 0, /* SADB_EXT_ADDRESS_DST */
184 0, /* SADB_EXT_ADDRESS_PROXY */
185 0, /* SADB_EXT_KEY_AUTH */
186 0, /* SADB_EXT_KEY_ENCRYPT */
187 0, /* SADB_EXT_IDENTITY_SRC */
188 0, /* SADB_EXT_IDENTITY_DST */
189 0, /* SADB_EXT_SENSITIVITY */
190 0, /* SADB_EXT_PROPOSAL */
191 0, /* SADB_EXT_SUPPORTED_AUTH */
192 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
193 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
194 0, /* SADB_X_EXT_KMPRIVATE */
195 0, /* SADB_X_EXT_POLICY */
196 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
199 static int ipsec_esp_keymin = 256;
200 static int ipsec_esp_auth = 0;
201 static int ipsec_ah_keymin = 128;
204 SYSCTL_DECL(_net_key);
207 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
208 &key_debug_level, 0, "");
210 /* max count of trial for the decision of spi value */
211 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
212 &key_spi_trycnt, 0, "");
214 /* minimum spi value to allocate automatically. */
215 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
216 &key_spi_minval, 0, "");
218 /* maximun spi value to allocate automatically. */
219 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
220 &key_spi_maxval, 0, "");
222 /* interval to initialize randseed */
223 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
224 &key_int_random, 0, "");
226 /* lifetime for larval SA */
227 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
228 &key_larval_lifetime, 0, "");
230 /* counter for blocking to send SADB_ACQUIRE to IKEd */
231 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
232 &key_blockacq_count, 0, "");
234 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
235 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
236 &key_blockacq_lifetime, 0, "");
239 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
240 &ipsec_esp_auth, 0, "");
242 /* minimum ESP key length */
243 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
244 &ipsec_esp_keymin, 0, "");
246 /* minimum AH key length */
247 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
248 &ipsec_ah_keymin, 0, "");
250 /* perfered old SA rather than new SA */
251 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
252 &key_prefered_oldsa, 0, "");
255 #define LIST_FOREACH(elm, head, field) \
256 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
258 #define __LIST_CHAINED(elm) \
259 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
260 #define LIST_INSERT_TAIL(head, elm, type, field) \
262 struct type *curelm = LIST_FIRST(head); \
263 if (curelm == NULL) {\
264 LIST_INSERT_HEAD(head, elm, field); \
266 while (LIST_NEXT(curelm, field)) \
267 curelm = LIST_NEXT(curelm, field);\
268 LIST_INSERT_AFTER(curelm, elm, field);\
272 #define KEY_CHKSASTATE(head, sav, name) \
274 if ((head) != (sav)) { \
275 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
276 (name), (head), (sav))); \
281 #define KEY_CHKSPDIR(head, sp, name) \
283 if ((head) != (sp)) { \
284 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
285 "anyway continue.\n", \
286 (name), (head), (sp))); \
290 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
293 #define KMALLOC(p, t, n) \
294 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT))
296 free((caddr_t)(p), M_SECA)
298 #define KMALLOC(p, t, n) \
300 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \
301 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \
302 __FILE__, __LINE__, (p), #t, n); \
307 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
308 free((caddr_t)(p), M_SECA); \
313 * set parameters into secpolicyindex buffer.
314 * Must allocate secpolicyindex buffer passed to this function.
316 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
318 bzero((idx), sizeof(struct secpolicyindex)); \
319 (idx)->dir = (_dir); \
320 (idx)->prefs = (ps); \
321 (idx)->prefd = (pd); \
322 (idx)->ul_proto = (ulp); \
323 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
324 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
328 * set parameters into secasindex buffer.
329 * Must allocate secasindex buffer before calling this function.
331 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
333 bzero((idx), sizeof(struct secasindex)); \
334 (idx)->proto = (p); \
336 (idx)->reqid = (r); \
337 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
338 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
343 u_long getspi_count; /* the avarage of count to try to get new SPI */
347 struct sadb_msg *msg;
348 struct sadb_ext *ext[SADB_EXT_MAX + 1];
349 int extoff[SADB_EXT_MAX + 1];
350 int extlen[SADB_EXT_MAX + 1];
353 static struct secasvar *key_allocsa_policy __P((const struct secasindex *));
354 static void key_freesp_so __P((struct secpolicy **));
355 static struct secasvar *key_do_allocsa_policy __P((struct secashead *, u_int));
356 static void key_delsp __P((struct secpolicy *));
357 static struct secpolicy *key_getsp __P((struct secpolicyindex *));
358 static struct secpolicy *key_getspbyid __P((u_int32_t));
359 static u_int32_t key_newreqid __P((void));
360 static struct mbuf *key_gather_mbuf __P((struct mbuf *,
361 const struct sadb_msghdr *, int, int, ...));
362 static int key_spdadd __P((struct socket *, struct mbuf *,
363 const struct sadb_msghdr *));
364 static u_int32_t key_getnewspid __P((void));
365 static int key_spddelete __P((struct socket *, struct mbuf *,
366 const struct sadb_msghdr *));
367 static int key_spddelete2 __P((struct socket *, struct mbuf *,
368 const struct sadb_msghdr *));
369 static int key_spdget __P((struct socket *, struct mbuf *,
370 const struct sadb_msghdr *));
371 static int key_spdflush __P((struct socket *, struct mbuf *,
372 const struct sadb_msghdr *));
373 static int key_spddump __P((struct socket *, struct mbuf *,
374 const struct sadb_msghdr *));
375 static struct mbuf *key_setdumpsp __P((struct secpolicy *,
376 u_int8_t, u_int32_t, u_int32_t));
377 static u_int key_getspreqmsglen __P((struct secpolicy *));
378 static int key_spdexpire __P((struct secpolicy *));
379 static struct secashead *key_newsah __P((struct secasindex *));
380 static void key_delsah __P((struct secashead *));
381 static struct secasvar *key_newsav __P((struct mbuf *,
382 const struct sadb_msghdr *, struct secashead *, int *,
384 #define KEY_NEWSAV(m, sadb, sah, e) \
385 key_newsav(m, sadb, sah, e, __FILE__, __LINE__)
386 static void key_delsav __P((struct secasvar *));
387 static struct secashead *key_getsah __P((struct secasindex *));
388 static struct secasvar *key_checkspidup __P((struct secasindex *, u_int32_t));
389 static struct secasvar *key_getsavbyspi __P((struct secashead *, u_int32_t));
390 static int key_setsaval __P((struct secasvar *, struct mbuf *,
391 const struct sadb_msghdr *));
392 static int key_mature __P((struct secasvar *));
393 static struct mbuf *key_setdumpsa __P((struct secasvar *, u_int8_t,
394 u_int8_t, u_int32_t, u_int32_t));
395 static struct mbuf *key_setsadbmsg __P((u_int8_t, u_int16_t, u_int8_t,
396 u_int32_t, pid_t, u_int16_t));
397 static struct mbuf *key_setsadbsa __P((struct secasvar *));
398 static struct mbuf *key_setsadbaddr __P((u_int16_t,
399 const struct sockaddr *, u_int8_t, u_int16_t));
401 static struct mbuf *key_setsadbident __P((u_int16_t, u_int16_t, caddr_t,
404 static struct mbuf *key_setsadbxsa2 __P((u_int8_t, u_int32_t, u_int32_t));
405 static struct mbuf *key_setsadbxpolicy __P((u_int16_t, u_int8_t,
407 static void *key_newbuf __P((const void *, u_int));
409 static int key_ismyaddr6 __P((struct sockaddr_in6 *));
412 /* flags for key_cmpsaidx() */
413 #define CMP_HEAD 1 /* protocol, addresses. */
414 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
415 #define CMP_REQID 3 /* additionally HEAD, reaid. */
416 #define CMP_EXACTLY 4 /* all elements. */
417 static int key_cmpsaidx
418 __P((const struct secasindex *, const struct secasindex *, int));
420 static int key_cmpspidx_exactly
421 __P((struct secpolicyindex *, struct secpolicyindex *));
422 static int key_cmpspidx_withmask
423 __P((struct secpolicyindex *, struct secpolicyindex *));
424 static int key_sockaddrcmp __P((const struct sockaddr *, const struct sockaddr *, int));
425 static int key_bbcmp __P((const void *, const void *, u_int));
426 static void key_srandom __P((void));
427 static u_int16_t key_satype2proto __P((u_int8_t));
428 static u_int8_t key_proto2satype __P((u_int16_t));
430 static int key_getspi __P((struct socket *, struct mbuf *,
431 const struct sadb_msghdr *));
432 static u_int32_t key_do_getnewspi __P((struct sadb_spirange *,
433 struct secasindex *));
434 static int key_update __P((struct socket *, struct mbuf *,
435 const struct sadb_msghdr *));
436 #ifdef IPSEC_DOSEQCHECK
437 static struct secasvar *key_getsavbyseq __P((struct secashead *, u_int32_t));
439 static int key_add __P((struct socket *, struct mbuf *,
440 const struct sadb_msghdr *));
441 static int key_setident __P((struct secashead *, struct mbuf *,
442 const struct sadb_msghdr *));
443 static struct mbuf *key_getmsgbuf_x1 __P((struct mbuf *,
444 const struct sadb_msghdr *));
445 static int key_delete __P((struct socket *, struct mbuf *,
446 const struct sadb_msghdr *));
447 static int key_get __P((struct socket *, struct mbuf *,
448 const struct sadb_msghdr *));
450 static void key_getcomb_setlifetime __P((struct sadb_comb *));
451 static struct mbuf *key_getcomb_esp __P((void));
452 static struct mbuf *key_getcomb_ah __P((void));
453 static struct mbuf *key_getcomb_ipcomp __P((void));
454 static struct mbuf *key_getprop __P((const struct secasindex *));
456 static int key_acquire __P((const struct secasindex *, struct secpolicy *));
457 #ifndef IPSEC_NONBLOCK_ACQUIRE
458 static struct secacq *key_newacq __P((const struct secasindex *));
459 static struct secacq *key_getacq __P((const struct secasindex *));
460 static struct secacq *key_getacqbyseq __P((u_int32_t));
462 static struct secspacq *key_newspacq __P((struct secpolicyindex *));
463 static struct secspacq *key_getspacq __P((struct secpolicyindex *));
464 static int key_acquire2 __P((struct socket *, struct mbuf *,
465 const struct sadb_msghdr *));
466 static int key_register __P((struct socket *, struct mbuf *,
467 const struct sadb_msghdr *));
468 static int key_expire __P((struct secasvar *));
469 static int key_flush __P((struct socket *, struct mbuf *,
470 const struct sadb_msghdr *));
471 static int key_dump __P((struct socket *, struct mbuf *,
472 const struct sadb_msghdr *));
473 static int key_promisc __P((struct socket *, struct mbuf *,
474 const struct sadb_msghdr *));
475 static int key_senderror __P((struct socket *, struct mbuf *, int));
476 static int key_validate_ext __P((const struct sadb_ext *, int));
477 static int key_align __P((struct mbuf *, struct sadb_msghdr *));
479 static const char *key_getfqdn __P((void));
480 static const char *key_getuserfqdn __P((void));
482 static void key_sa_chgstate __P((struct secasvar *, u_int8_t));
483 static struct mbuf *key_alloc_mbuf __P((int));
485 #define SA_ADDREF(p) do { \
487 KASSERT((p)->refcnt != 0, \
488 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \
490 #define SA_DELREF(p) do { \
491 KASSERT((p)->refcnt > 0, \
492 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \
496 #define SP_ADDREF(p) do { \
498 KASSERT((p)->refcnt != 0, \
499 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \
501 #define SP_DELREF(p) do { \
502 KASSERT((p)->refcnt > 0, \
503 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \
508 * Return 0 when there are known to be no SP's for the specified
509 * direction. Otherwise return 1. This is used by IPsec code
510 * to optimize performance.
513 key_havesp(u_int dir)
515 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
516 LIST_FIRST(&sptree[dir]) != NULL : 1);
519 /* %%% IPsec policy management */
521 * allocating a SP for OUTBOUND or INBOUND packet.
522 * Must call key_freesp() later.
523 * OUT: NULL: not found
524 * others: found and return the pointer.
527 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag)
529 struct secpolicy *sp;
532 KASSERT(spidx != NULL, ("key_allocsp: null spidx"));
533 KASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
534 ("key_allocsp: invalid direction %u", dir));
536 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
537 printf("DP key_allocsp from %s:%u\n", where, tag));
540 s = splnet(); /*called from softclock()*/
541 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
542 printf("*** objects\n");
543 kdebug_secpolicyindex(spidx));
545 LIST_FOREACH(sp, &sptree[dir], chain) {
546 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
547 printf("*** in SPD\n");
548 kdebug_secpolicyindex(&sp->spidx));
550 if (sp->state == IPSEC_SPSTATE_DEAD)
552 if (key_cmpspidx_withmask(&sp->spidx, spidx))
559 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
561 /* found a SPD entry */
562 sp->lastused = time_second;
567 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
568 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n",
569 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
574 * allocating a SP for OUTBOUND or INBOUND packet.
575 * Must call key_freesp() later.
576 * OUT: NULL: not found
577 * others: found and return the pointer.
580 key_allocsp2(u_int32_t spi,
581 union sockaddr_union *dst,
584 const char* where, int tag)
586 struct secpolicy *sp;
589 KASSERT(dst != NULL, ("key_allocsp2: null dst"));
590 KASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
591 ("key_allocsp2: invalid direction %u", dir));
593 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
594 printf("DP key_allocsp2 from %s:%u\n", where, tag));
597 s = splnet(); /*called from softclock()*/
598 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
599 printf("*** objects\n");
600 printf("spi %u proto %u dir %u\n", spi, proto, dir);
601 kdebug_sockaddr(&dst->sa));
603 LIST_FOREACH(sp, &sptree[dir], chain) {
604 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
605 printf("*** in SPD\n");
606 kdebug_secpolicyindex(&sp->spidx));
608 if (sp->state == IPSEC_SPSTATE_DEAD)
610 /* compare simple values, then dst address */
611 if (sp->spidx.ul_proto != proto)
613 /* NB: spi's must exist and match */
614 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi)
616 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0)
623 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2");
625 /* found a SPD entry */
626 sp->lastused = time_second;
631 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
632 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n",
633 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
638 * return a policy that matches this particular inbound packet.
642 key_gettunnel(const struct sockaddr *osrc,
643 const struct sockaddr *odst,
644 const struct sockaddr *isrc,
645 const struct sockaddr *idst,
646 const char* where, int tag)
648 struct secpolicy *sp;
649 const int dir = IPSEC_DIR_INBOUND;
651 struct ipsecrequest *r1, *r2, *p;
652 struct secpolicyindex spidx;
654 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
655 printf("DP key_gettunnel from %s:%u\n", where, tag));
657 if (isrc->sa_family != idst->sa_family) {
658 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
659 isrc->sa_family, idst->sa_family));
664 s = splnet(); /*called from softclock()*/
665 LIST_FOREACH(sp, &sptree[dir], chain) {
666 if (sp->state == IPSEC_SPSTATE_DEAD)
670 for (p = sp->req; p; p = p->next) {
671 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
678 /* here we look at address matches only */
680 if (isrc->sa_len > sizeof(spidx.src) ||
681 idst->sa_len > sizeof(spidx.dst))
683 bcopy(isrc, &spidx.src, isrc->sa_len);
684 bcopy(idst, &spidx.dst, idst->sa_len);
685 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
688 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) ||
689 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0))
693 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) ||
694 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0))
703 sp->lastused = time_second;
708 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
709 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n",
710 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
715 * allocating an SA entry for an *OUTBOUND* packet.
716 * checking each request entries in SP, and acquire an SA if need.
717 * OUT: 0: there are valid requests.
718 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
721 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx)
726 KASSERT(isr != NULL, ("key_checkrequest: null isr"));
727 KASSERT(saidx != NULL, ("key_checkrequest: null saidx"));
728 KASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
729 saidx->mode == IPSEC_MODE_TUNNEL,
730 ("key_checkrequest: unexpected policy %u", saidx->mode));
732 /* get current level */
733 level = ipsec_get_reqlevel(isr);
736 * XXX guard against protocol callbacks from the crypto
737 * thread as they reference ipsecrequest.sav which we
738 * temporarily null out below. Need to rethink how we
739 * handle bundled SA's in the callback thread.
741 SPLASSERT(net, "key_checkrequest");
744 * We do allocate new SA only if the state of SA in the holder is
745 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
747 if (isr->sav != NULL) {
748 if (isr->sav->sah == NULL)
749 panic("key_checkrequest: sah is null.\n");
750 if (isr->sav == (struct secasvar *)LIST_FIRST(
751 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
752 KEY_FREESAV(&isr->sav);
758 * we free any SA stashed in the IPsec request because a different
759 * SA may be involved each time this request is checked, either
760 * because new SAs are being configured, or this request is
761 * associated with an unconnected datagram socket, or this request
762 * is associated with a system default policy.
764 * The operation may have negative impact to performance. We may
765 * want to check cached SA carefully, rather than picking new SA
768 if (isr->sav != NULL) {
769 KEY_FREESAV(&isr->sav);
775 * new SA allocation if no SA found.
776 * key_allocsa_policy should allocate the oldest SA available.
777 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
779 if (isr->sav == NULL)
780 isr->sav = key_allocsa_policy(saidx);
782 /* When there is SA. */
783 if (isr->sav != NULL) {
784 if (isr->sav->state != SADB_SASTATE_MATURE &&
785 isr->sav->state != SADB_SASTATE_DYING)
791 error = key_acquire(saidx, isr->sp);
793 /* XXX What should I do ? */
794 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
795 "from key_acquire.\n", error));
799 if (level != IPSEC_LEVEL_REQUIRE) {
800 /* XXX sigh, the interface to this routine is botched */
801 KASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA"));
809 * allocating a SA for policy entry from SAD.
810 * NOTE: searching SAD of aliving state.
811 * OUT: NULL: not found.
812 * others: found and return the pointer.
814 static struct secasvar *
815 key_allocsa_policy(const struct secasindex *saidx)
817 struct secashead *sah;
818 struct secasvar *sav;
819 u_int stateidx, state;
821 LIST_FOREACH(sah, &sahtree, chain) {
822 if (sah->state == SADB_SASTATE_DEAD)
824 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
832 /* search valid state */
834 stateidx < _ARRAYLEN(saorder_state_valid);
837 state = saorder_state_valid[stateidx];
839 sav = key_do_allocsa_policy(sah, state);
848 * searching SAD with direction, protocol, mode and state.
849 * called by key_allocsa_policy().
852 * others : found, pointer to a SA.
854 static struct secasvar *
855 key_do_allocsa_policy(struct secashead *sah, u_int state)
857 struct secasvar *sav, *nextsav, *candidate, *d;
862 for (sav = LIST_FIRST(&sah->savtree[state]);
866 nextsav = LIST_NEXT(sav, chain);
869 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
872 if (candidate == NULL) {
877 /* Which SA is the better ? */
880 if (candidate->lft_c == NULL || sav->lft_c == NULL)
881 panic("key_do_allocsa_policy: "
882 "lifetime_current is NULL.\n");
884 /* What the best method is to compare ? */
885 if (key_prefered_oldsa) {
886 if (candidate->lft_c->sadb_lifetime_addtime >
887 sav->lft_c->sadb_lifetime_addtime) {
894 /* prefered new sa rather than old sa */
895 if (candidate->lft_c->sadb_lifetime_addtime <
896 sav->lft_c->sadb_lifetime_addtime) {
903 * prepared to delete the SA when there is more
904 * suitable candidate and the lifetime of the SA is not
907 if (d->lft_c->sadb_lifetime_addtime != 0) {
908 struct mbuf *m, *result;
910 key_sa_chgstate(d, SADB_SASTATE_DEAD);
912 KASSERT(d->refcnt > 0,
913 ("key_do_allocsa_policy: bogus ref count"));
914 m = key_setsadbmsg(SADB_DELETE, 0,
915 d->sah->saidx.proto, 0, 0, d->refcnt - 1);
920 /* set sadb_address for saidx's. */
921 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
922 &d->sah->saidx.src.sa,
923 d->sah->saidx.src.sa.sa_len << 3,
929 /* set sadb_address for saidx's. */
930 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
931 &d->sah->saidx.src.sa,
932 d->sah->saidx.src.sa.sa_len << 3,
938 /* create SA extension */
939 m = key_setsadbsa(d);
944 if (result->m_len < sizeof(struct sadb_msg)) {
945 result = m_pullup(result,
946 sizeof(struct sadb_msg));
951 result->m_pkthdr.len = 0;
952 for (m = result; m; m = m->m_next)
953 result->m_pkthdr.len += m->m_len;
954 mtod(result, struct sadb_msg *)->sadb_msg_len =
955 PFKEY_UNIT64(result->m_pkthdr.len);
957 if (key_sendup_mbuf(NULL, result,
958 KEY_SENDUP_REGISTERED))
966 SA_ADDREF(candidate);
967 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
968 printf("DP allocsa_policy cause "
969 "refcnt++:%d SA:%p\n",
970 candidate->refcnt, candidate));
976 * allocating a usable SA entry for a *INBOUND* packet.
977 * Must call key_freesav() later.
978 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
979 * NULL: not found, or error occured.
981 * In the comparison, no source address is used--for RFC2401 conformance.
982 * To quote, from section 4.1:
983 * A security association is uniquely identified by a triple consisting
984 * of a Security Parameter Index (SPI), an IP Destination Address, and a
985 * security protocol (AH or ESP) identifier.
986 * Note that, however, we do need to keep source address in IPsec SA.
987 * IKE specification and PF_KEY specification do assume that we
988 * keep source address in IPsec SA. We see a tricky situation here.
992 union sockaddr_union *dst,
995 const char* where, int tag)
997 struct secashead *sah;
998 struct secasvar *sav;
999 u_int stateidx, state;
1002 KASSERT(dst != NULL, ("key_allocsa: null dst address"));
1004 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1005 printf("DP key_allocsa from %s:%u\n", where, tag));
1009 * XXX: to be checked internal IP header somewhere. Also when
1010 * IPsec tunnel packet is received. But ESP tunnel mode is
1011 * encrypted so we can't check internal IP header.
1013 s = splnet(); /*called from softclock()*/
1014 LIST_FOREACH(sah, &sahtree, chain) {
1015 /* search valid state */
1017 stateidx < _ARRAYLEN(saorder_state_valid);
1019 state = saorder_state_valid[stateidx];
1020 LIST_FOREACH(sav, &sah->savtree[state], chain) {
1022 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
1023 /* do not return entries w/ unusable state */
1024 if (sav->state != SADB_SASTATE_MATURE &&
1025 sav->state != SADB_SASTATE_DYING)
1027 if (proto != sav->sah->saidx.proto)
1029 if (spi != sav->spi)
1031 #if 0 /* don't check src */
1032 /* check src address */
1033 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0)
1036 /* check dst address */
1037 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0)
1048 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1049 printf("DP key_allocsa return SA:%p; refcnt %u\n",
1050 sav, sav ? sav->refcnt : 0));
1055 * Must be called after calling key_allocsp().
1056 * For both the packet without socket and key_freeso().
1059 _key_freesp(struct secpolicy **spp, const char* where, int tag)
1061 struct secpolicy *sp = *spp;
1063 KASSERT(sp != NULL, ("key_freesp: null sp"));
1067 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1068 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n",
1069 sp, sp->id, where, tag, sp->refcnt));
1071 if (sp->refcnt == 0) {
1078 * Must be called after calling key_allocsp().
1079 * For the packet with socket.
1082 key_freeso(struct socket *so)
1085 KASSERT(so != NULL, ("key_freeso: null so"));
1087 switch (so->so_proto->pr_domain->dom_family) {
1091 struct inpcb *pcb = sotoinpcb(so);
1093 /* Does it have a PCB ? */
1096 key_freesp_so(&pcb->inp_sp->sp_in);
1097 key_freesp_so(&pcb->inp_sp->sp_out);
1104 #ifdef HAVE_NRL_INPCB
1105 struct inpcb *pcb = sotoinpcb(so);
1107 /* Does it have a PCB ? */
1110 key_freesp_so(&pcb->inp_sp->sp_in);
1111 key_freesp_so(&pcb->inp_sp->sp_out);
1113 struct in6pcb *pcb = sotoin6pcb(so);
1115 /* Does it have a PCB ? */
1118 key_freesp_so(&pcb->in6p_sp->sp_in);
1119 key_freesp_so(&pcb->in6p_sp->sp_out);
1125 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1126 so->so_proto->pr_domain->dom_family));
1132 key_freesp_so(struct secpolicy **sp)
1134 KASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp"));
1136 if ((*sp)->policy == IPSEC_POLICY_ENTRUST ||
1137 (*sp)->policy == IPSEC_POLICY_BYPASS)
1140 KASSERT((*sp)->policy == IPSEC_POLICY_IPSEC,
1141 ("key_freesp_so: invalid policy %u", (*sp)->policy));
1146 * Must be called after calling key_allocsa().
1147 * This function is called by key_freesp() to free some SA allocated
1151 key_freesav(struct secasvar **psav, const char* where, int tag)
1153 struct secasvar *sav = *psav;
1155 KASSERT(sav != NULL, ("key_freesav: null sav"));
1159 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1160 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n",
1161 sav, ntohl(sav->spi), where, tag, sav->refcnt));
1163 if (sav->refcnt == 0) {
1169 /* %%% SPD management */
1171 * free security policy entry.
1174 key_delsp(struct secpolicy *sp)
1178 KASSERT(sp != NULL, ("key_delsp: null sp"));
1180 sp->state = IPSEC_SPSTATE_DEAD;
1182 KASSERT(sp->refcnt == 0,
1183 ("key_delsp: SP with references deleted (refcnt %u)",
1186 s = splnet(); /*called from softclock()*/
1187 /* remove from SP index */
1188 if (__LIST_CHAINED(sp))
1189 LIST_REMOVE(sp, chain);
1192 struct ipsecrequest *isr = sp->req, *nextisr;
1194 while (isr != NULL) {
1195 if (isr->sav != NULL) {
1196 KEY_FREESAV(&isr->sav);
1200 nextisr = isr->next;
1213 * OUT: NULL : not found
1214 * others : found, pointer to a SP.
1216 static struct secpolicy *
1217 key_getsp(struct secpolicyindex *spidx)
1219 struct secpolicy *sp;
1221 KASSERT(spidx != NULL, ("key_getsp: null spidx"));
1223 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1224 if (sp->state == IPSEC_SPSTATE_DEAD)
1226 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1237 * OUT: NULL : not found
1238 * others : found, pointer to a SP.
1240 static struct secpolicy *
1241 key_getspbyid(u_int32_t id)
1243 struct secpolicy *sp;
1245 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1246 if (sp->state == IPSEC_SPSTATE_DEAD)
1254 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1255 if (sp->state == IPSEC_SPSTATE_DEAD)
1267 key_newsp(const char* where, int tag)
1269 struct secpolicy *newsp = NULL;
1271 newsp = (struct secpolicy *)
1272 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO);
1278 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1279 printf("DP key_newsp from %s:%u return SP:%p\n",
1280 where, tag, newsp));
1285 * create secpolicy structure from sadb_x_policy structure.
1286 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1287 * so must be set properly later.
1290 key_msg2sp(xpl0, len, error)
1291 struct sadb_x_policy *xpl0;
1295 struct secpolicy *newsp;
1299 panic("key_msg2sp: NULL pointer was passed.\n");
1300 if (len < sizeof(*xpl0))
1301 panic("key_msg2sp: invalid length.\n");
1302 if (len != PFKEY_EXTLEN(xpl0)) {
1303 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1308 if ((newsp = KEY_NEWSP()) == NULL) {
1313 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1314 newsp->policy = xpl0->sadb_x_policy_type;
1317 switch (xpl0->sadb_x_policy_type) {
1318 case IPSEC_POLICY_DISCARD:
1319 case IPSEC_POLICY_NONE:
1320 case IPSEC_POLICY_ENTRUST:
1321 case IPSEC_POLICY_BYPASS:
1325 case IPSEC_POLICY_IPSEC:
1328 struct sadb_x_ipsecrequest *xisr;
1329 struct ipsecrequest **p_isr = &newsp->req;
1331 /* validity check */
1332 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1333 ipseclog((LOG_DEBUG,
1334 "key_msg2sp: Invalid msg length.\n"));
1340 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1341 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1345 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1346 ipseclog((LOG_DEBUG, "key_msg2sp: "
1347 "invalid ipsecrequest length.\n"));
1353 /* allocate request buffer */
1354 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1355 if ((*p_isr) == NULL) {
1356 ipseclog((LOG_DEBUG,
1357 "key_msg2sp: No more memory.\n"));
1362 bzero(*p_isr, sizeof(**p_isr));
1365 (*p_isr)->next = NULL;
1367 switch (xisr->sadb_x_ipsecrequest_proto) {
1370 case IPPROTO_IPCOMP:
1373 ipseclog((LOG_DEBUG,
1374 "key_msg2sp: invalid proto type=%u\n",
1375 xisr->sadb_x_ipsecrequest_proto));
1377 *error = EPROTONOSUPPORT;
1380 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1382 switch (xisr->sadb_x_ipsecrequest_mode) {
1383 case IPSEC_MODE_TRANSPORT:
1384 case IPSEC_MODE_TUNNEL:
1386 case IPSEC_MODE_ANY:
1388 ipseclog((LOG_DEBUG,
1389 "key_msg2sp: invalid mode=%u\n",
1390 xisr->sadb_x_ipsecrequest_mode));
1395 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1397 switch (xisr->sadb_x_ipsecrequest_level) {
1398 case IPSEC_LEVEL_DEFAULT:
1399 case IPSEC_LEVEL_USE:
1400 case IPSEC_LEVEL_REQUIRE:
1402 case IPSEC_LEVEL_UNIQUE:
1403 /* validity check */
1405 * If range violation of reqid, kernel will
1406 * update it, don't refuse it.
1408 if (xisr->sadb_x_ipsecrequest_reqid
1409 > IPSEC_MANUAL_REQID_MAX) {
1410 ipseclog((LOG_DEBUG,
1411 "key_msg2sp: reqid=%d range "
1412 "violation, updated by kernel.\n",
1413 xisr->sadb_x_ipsecrequest_reqid));
1414 xisr->sadb_x_ipsecrequest_reqid = 0;
1417 /* allocate new reqid id if reqid is zero. */
1418 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1420 if ((reqid = key_newreqid()) == 0) {
1425 (*p_isr)->saidx.reqid = reqid;
1426 xisr->sadb_x_ipsecrequest_reqid = reqid;
1428 /* set it for manual keying. */
1429 (*p_isr)->saidx.reqid =
1430 xisr->sadb_x_ipsecrequest_reqid;
1435 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1436 xisr->sadb_x_ipsecrequest_level));
1441 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1443 /* set IP addresses if there */
1444 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1445 struct sockaddr *paddr;
1447 paddr = (struct sockaddr *)(xisr + 1);
1449 /* validity check */
1451 > sizeof((*p_isr)->saidx.src)) {
1452 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1453 "address length.\n"));
1458 bcopy(paddr, &(*p_isr)->saidx.src,
1461 paddr = (struct sockaddr *)((caddr_t)paddr
1464 /* validity check */
1466 > sizeof((*p_isr)->saidx.dst)) {
1467 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1468 "address length.\n"));
1473 bcopy(paddr, &(*p_isr)->saidx.dst,
1477 (*p_isr)->sav = NULL;
1478 (*p_isr)->sp = newsp;
1480 /* initialization for the next. */
1481 p_isr = &(*p_isr)->next;
1482 tlen -= xisr->sadb_x_ipsecrequest_len;
1484 /* validity check */
1486 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1492 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1493 + xisr->sadb_x_ipsecrequest_len);
1498 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1511 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1513 auto_reqid = (auto_reqid == ~0
1514 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1516 /* XXX should be unique check */
1522 * copy secpolicy struct to sadb_x_policy structure indicated.
1526 struct secpolicy *sp;
1528 struct sadb_x_policy *xpl;
1535 panic("key_sp2msg: NULL pointer was passed.\n");
1537 tlen = key_getspreqmsglen(sp);
1539 m = key_alloc_mbuf(tlen);
1540 if (!m || m->m_next) { /*XXX*/
1548 xpl = mtod(m, struct sadb_x_policy *);
1551 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1552 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1553 xpl->sadb_x_policy_type = sp->policy;
1554 xpl->sadb_x_policy_dir = sp->spidx.dir;
1555 xpl->sadb_x_policy_id = sp->id;
1556 p = (caddr_t)xpl + sizeof(*xpl);
1558 /* if is the policy for ipsec ? */
1559 if (sp->policy == IPSEC_POLICY_IPSEC) {
1560 struct sadb_x_ipsecrequest *xisr;
1561 struct ipsecrequest *isr;
1563 for (isr = sp->req; isr != NULL; isr = isr->next) {
1565 xisr = (struct sadb_x_ipsecrequest *)p;
1567 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1568 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1569 xisr->sadb_x_ipsecrequest_level = isr->level;
1570 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1573 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len);
1574 p += isr->saidx.src.sa.sa_len;
1575 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len);
1576 p += isr->saidx.src.sa.sa_len;
1578 xisr->sadb_x_ipsecrequest_len =
1579 PFKEY_ALIGN8(sizeof(*xisr)
1580 + isr->saidx.src.sa.sa_len
1581 + isr->saidx.dst.sa.sa_len);
1588 /* m will not be freed nor modified */
1589 static struct mbuf *
1591 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1592 int ndeep, int nitem, ...)
1594 key_gather_mbuf(m, mhp, ndeep, nitem, va_alist)
1596 const struct sadb_msghdr *mhp;
1605 struct mbuf *result = NULL, *n;
1608 if (m == NULL || mhp == NULL)
1609 panic("null pointer passed to key_gather");
1611 va_start(ap, nitem);
1612 for (i = 0; i < nitem; i++) {
1613 idx = va_arg(ap, int);
1614 if (idx < 0 || idx > SADB_EXT_MAX)
1616 /* don't attempt to pull empty extension */
1617 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1619 if (idx != SADB_EXT_RESERVED &&
1620 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1623 if (idx == SADB_EXT_RESERVED) {
1624 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1627 panic("assumption failed");
1629 MGETHDR(n, M_DONTWAIT, MT_DATA);
1634 m_copydata(m, 0, sizeof(struct sadb_msg),
1636 } else if (i < ndeep) {
1637 len = mhp->extlen[idx];
1638 n = key_alloc_mbuf(len);
1639 if (!n || n->m_next) { /*XXX*/
1644 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1647 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1660 if ((result->m_flags & M_PKTHDR) != 0) {
1661 result->m_pkthdr.len = 0;
1662 for (n = result; n; n = n->m_next)
1663 result->m_pkthdr.len += n->m_len;
1674 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1675 * add an entry to SP database, when received
1676 * <base, address(SD), (lifetime(H),) policy>
1678 * Adding to SP database,
1680 * <base, address(SD), (lifetime(H),) policy>
1681 * to the socket which was send.
1683 * SPDADD set a unique policy entry.
1684 * SPDSETIDX like SPDADD without a part of policy requests.
1685 * SPDUPDATE replace a unique policy entry.
1687 * m will always be freed.
1690 key_spdadd(so, m, mhp)
1693 const struct sadb_msghdr *mhp;
1695 struct sadb_address *src0, *dst0;
1696 struct sadb_x_policy *xpl0, *xpl;
1697 struct sadb_lifetime *lft = NULL;
1698 struct secpolicyindex spidx;
1699 struct secpolicy *newsp;
1703 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1704 panic("key_spdadd: NULL pointer is passed.\n");
1706 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1707 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1708 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1709 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1710 return key_senderror(so, m, EINVAL);
1712 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1713 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1714 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1715 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1716 return key_senderror(so, m, EINVAL);
1718 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1719 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1720 < sizeof(struct sadb_lifetime)) {
1721 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1722 return key_senderror(so, m, EINVAL);
1724 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1727 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1728 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1729 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1732 /* XXX boundary check against sa_len */
1733 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1736 src0->sadb_address_prefixlen,
1737 dst0->sadb_address_prefixlen,
1738 src0->sadb_address_proto,
1741 /* checking the direciton. */
1742 switch (xpl0->sadb_x_policy_dir) {
1743 case IPSEC_DIR_INBOUND:
1744 case IPSEC_DIR_OUTBOUND:
1747 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1748 mhp->msg->sadb_msg_errno = EINVAL;
1753 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1754 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1755 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1756 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1757 return key_senderror(so, m, EINVAL);
1760 /* policy requests are mandatory when action is ipsec. */
1761 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1762 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1763 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1764 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1765 return key_senderror(so, m, EINVAL);
1769 * checking there is SP already or not.
1770 * SPDUPDATE doesn't depend on whether there is a SP or not.
1771 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1774 newsp = key_getsp(&spidx);
1775 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1777 newsp->state = IPSEC_SPSTATE_DEAD;
1781 if (newsp != NULL) {
1783 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1784 return key_senderror(so, m, EEXIST);
1788 /* allocation new SP entry */
1789 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1790 return key_senderror(so, m, error);
1793 if ((newsp->id = key_getnewspid()) == 0) {
1795 return key_senderror(so, m, ENOBUFS);
1798 /* XXX boundary check against sa_len */
1799 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1802 src0->sadb_address_prefixlen,
1803 dst0->sadb_address_prefixlen,
1804 src0->sadb_address_proto,
1807 /* sanity check on addr pair */
1808 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1809 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1811 return key_senderror(so, m, EINVAL);
1813 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1814 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1816 return key_senderror(so, m, EINVAL);
1819 if (newsp->req && newsp->req->saidx.src.sa.sa_family) {
1820 struct sockaddr *sa;
1821 sa = (struct sockaddr *)(src0 + 1);
1822 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) {
1824 return key_senderror(so, m, EINVAL);
1827 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) {
1828 struct sockaddr *sa;
1829 sa = (struct sockaddr *)(dst0 + 1);
1830 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) {
1832 return key_senderror(so, m, EINVAL);
1837 newsp->created = time_second;
1838 newsp->lastused = newsp->created;
1839 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1840 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1842 newsp->refcnt = 1; /* do not reclaim until I say I do */
1843 newsp->state = IPSEC_SPSTATE_ALIVE;
1844 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1846 /* delete the entry in spacqtree */
1847 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1848 struct secspacq *spacq;
1849 if ((spacq = key_getspacq(&spidx)) != NULL) {
1850 /* reset counter in order to deletion by timehandler. */
1851 spacq->created = time_second;
1857 struct mbuf *n, *mpolicy;
1858 struct sadb_msg *newmsg;
1861 /* create new sadb_msg to reply. */
1863 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1864 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1865 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1867 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1869 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1872 return key_senderror(so, m, ENOBUFS);
1874 if (n->m_len < sizeof(*newmsg)) {
1875 n = m_pullup(n, sizeof(*newmsg));
1877 return key_senderror(so, m, ENOBUFS);
1879 newmsg = mtod(n, struct sadb_msg *);
1880 newmsg->sadb_msg_errno = 0;
1881 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1884 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1885 sizeof(*xpl), &off);
1886 if (mpolicy == NULL) {
1887 /* n is already freed */
1888 return key_senderror(so, m, ENOBUFS);
1890 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1891 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1893 return key_senderror(so, m, EINVAL);
1895 xpl->sadb_x_policy_id = newsp->id;
1898 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1903 * get new policy id.
1911 u_int32_t newid = 0;
1912 int count = key_spi_trycnt; /* XXX */
1913 struct secpolicy *sp;
1915 /* when requesting to allocate spi ranged */
1917 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1919 if ((sp = key_getspbyid(newid)) == NULL)
1925 if (count == 0 || newid == 0) {
1926 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1934 * SADB_SPDDELETE processing
1936 * <base, address(SD), policy(*)>
1937 * from the user(?), and set SADB_SASTATE_DEAD,
1939 * <base, address(SD), policy(*)>
1941 * policy(*) including direction of policy.
1943 * m will always be freed.
1946 key_spddelete(so, m, mhp)
1949 const struct sadb_msghdr *mhp;
1951 struct sadb_address *src0, *dst0;
1952 struct sadb_x_policy *xpl0;
1953 struct secpolicyindex spidx;
1954 struct secpolicy *sp;
1957 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1958 panic("key_spddelete: NULL pointer is passed.\n");
1960 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1961 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1962 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1963 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1964 return key_senderror(so, m, EINVAL);
1966 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1967 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1968 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1969 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1970 return key_senderror(so, m, EINVAL);
1973 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1974 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1975 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1978 /* XXX boundary check against sa_len */
1979 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1982 src0->sadb_address_prefixlen,
1983 dst0->sadb_address_prefixlen,
1984 src0->sadb_address_proto,
1987 /* checking the direciton. */
1988 switch (xpl0->sadb_x_policy_dir) {
1989 case IPSEC_DIR_INBOUND:
1990 case IPSEC_DIR_OUTBOUND:
1993 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
1994 return key_senderror(so, m, EINVAL);
1997 /* Is there SP in SPD ? */
1998 if ((sp = key_getsp(&spidx)) == NULL) {
1999 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2000 return key_senderror(so, m, EINVAL);
2003 /* save policy id to buffer to be returned. */
2004 xpl0->sadb_x_policy_id = sp->id;
2006 sp->state = IPSEC_SPSTATE_DEAD;
2011 struct sadb_msg *newmsg;
2013 /* create new sadb_msg to reply. */
2014 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2015 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2017 return key_senderror(so, m, ENOBUFS);
2019 newmsg = mtod(n, struct sadb_msg *);
2020 newmsg->sadb_msg_errno = 0;
2021 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2024 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2029 * SADB_SPDDELETE2 processing
2032 * from the user(?), and set SADB_SASTATE_DEAD,
2036 * policy(*) including direction of policy.
2038 * m will always be freed.
2041 key_spddelete2(so, m, mhp)
2044 const struct sadb_msghdr *mhp;
2047 struct secpolicy *sp;
2050 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2051 panic("key_spddelete2: NULL pointer is passed.\n");
2053 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2054 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2055 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2056 key_senderror(so, m, EINVAL);
2060 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2062 /* Is there SP in SPD ? */
2063 if ((sp = key_getspbyid(id)) == NULL) {
2064 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2065 key_senderror(so, m, EINVAL);
2068 sp->state = IPSEC_SPSTATE_DEAD;
2072 struct mbuf *n, *nn;
2073 struct sadb_msg *newmsg;
2076 /* create new sadb_msg to reply. */
2077 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2080 return key_senderror(so, m, ENOBUFS);
2081 MGETHDR(n, M_DONTWAIT, MT_DATA);
2082 if (n && len > MHLEN) {
2083 MCLGET(n, M_DONTWAIT);
2084 if ((n->m_flags & M_EXT) == 0) {
2090 return key_senderror(so, m, ENOBUFS);
2096 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2097 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2101 panic("length inconsistency in key_spddelete2");
2104 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2105 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT);
2108 return key_senderror(so, m, ENOBUFS);
2111 n->m_pkthdr.len = 0;
2112 for (nn = n; nn; nn = nn->m_next)
2113 n->m_pkthdr.len += nn->m_len;
2115 newmsg = mtod(n, struct sadb_msg *);
2116 newmsg->sadb_msg_errno = 0;
2117 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2120 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2125 * SADB_X_GET processing
2130 * <base, address(SD), policy>
2132 * policy(*) including direction of policy.
2134 * m will always be freed.
2137 key_spdget(so, m, mhp)
2140 const struct sadb_msghdr *mhp;
2143 struct secpolicy *sp;
2147 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2148 panic("key_spdget: NULL pointer is passed.\n");
2150 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2151 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2152 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2153 return key_senderror(so, m, EINVAL);
2156 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2158 /* Is there SP in SPD ? */
2159 if ((sp = key_getspbyid(id)) == NULL) {
2160 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2161 return key_senderror(so, m, ENOENT);
2164 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2167 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2169 return key_senderror(so, m, ENOBUFS);
2173 * SADB_X_SPDACQUIRE processing.
2174 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2177 * to KMD, and expect to receive
2178 * <base> with SADB_X_SPDACQUIRE if error occured,
2181 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2182 * policy(*) is without policy requests.
2185 * others: error number
2189 struct secpolicy *sp;
2191 struct mbuf *result = NULL, *m;
2192 struct secspacq *newspacq;
2197 panic("key_spdacquire: NULL pointer is passed.\n");
2198 if (sp->req != NULL)
2199 panic("key_spdacquire: called but there is request.\n");
2200 if (sp->policy != IPSEC_POLICY_IPSEC)
2201 panic("key_spdacquire: policy mismathed. IPsec is expected.\n");
2203 /* Get an entry to check whether sent message or not. */
2204 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2205 if (key_blockacq_count < newspacq->count) {
2206 /* reset counter and do send message. */
2207 newspacq->count = 0;
2209 /* increment counter and do nothing. */
2214 /* make new entry for blocking to send SADB_ACQUIRE. */
2215 if ((newspacq = key_newspacq(&sp->spidx)) == NULL)
2218 /* add to acqtree */
2219 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2222 /* create new sadb_msg to reply. */
2223 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2230 result->m_pkthdr.len = 0;
2231 for (m = result; m; m = m->m_next)
2232 result->m_pkthdr.len += m->m_len;
2234 mtod(result, struct sadb_msg *)->sadb_msg_len =
2235 PFKEY_UNIT64(result->m_pkthdr.len);
2237 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2246 * SADB_SPDFLUSH processing
2249 * from the user, and free all entries in secpctree.
2253 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2255 * m will always be freed.
2258 key_spdflush(so, m, mhp)
2261 const struct sadb_msghdr *mhp;
2263 struct sadb_msg *newmsg;
2264 struct secpolicy *sp;
2268 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2269 panic("key_spdflush: NULL pointer is passed.\n");
2271 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2272 return key_senderror(so, m, EINVAL);
2274 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2275 LIST_FOREACH(sp, &sptree[dir], chain) {
2276 sp->state = IPSEC_SPSTATE_DEAD;
2280 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2281 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2282 return key_senderror(so, m, ENOBUFS);
2288 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2289 newmsg = mtod(m, struct sadb_msg *);
2290 newmsg->sadb_msg_errno = 0;
2291 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2293 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2297 * SADB_SPDDUMP processing
2300 * from the user, and dump all SP leaves
2305 * m will always be freed.
2308 key_spddump(so, m, mhp)
2311 const struct sadb_msghdr *mhp;
2313 struct secpolicy *sp;
2319 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2320 panic("key_spddump: NULL pointer is passed.\n");
2322 /* search SPD entry and get buffer size. */
2324 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2325 LIST_FOREACH(sp, &sptree[dir], chain) {
2331 return key_senderror(so, m, ENOENT);
2333 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2334 LIST_FOREACH(sp, &sptree[dir], chain) {
2336 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2337 mhp->msg->sadb_msg_pid);
2340 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2348 static struct mbuf *
2349 key_setdumpsp(sp, type, seq, pid)
2350 struct secpolicy *sp;
2354 struct mbuf *result = NULL, *m;
2356 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2361 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2362 &sp->spidx.src.sa, sp->spidx.prefs,
2363 sp->spidx.ul_proto);
2368 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2369 &sp->spidx.dst.sa, sp->spidx.prefd,
2370 sp->spidx.ul_proto);
2380 if ((result->m_flags & M_PKTHDR) == 0)
2383 if (result->m_len < sizeof(struct sadb_msg)) {
2384 result = m_pullup(result, sizeof(struct sadb_msg));
2389 result->m_pkthdr.len = 0;
2390 for (m = result; m; m = m->m_next)
2391 result->m_pkthdr.len += m->m_len;
2393 mtod(result, struct sadb_msg *)->sadb_msg_len =
2394 PFKEY_UNIT64(result->m_pkthdr.len);
2404 * get PFKEY message length for security policy and request.
2407 key_getspreqmsglen(sp)
2408 struct secpolicy *sp;
2412 tlen = sizeof(struct sadb_x_policy);
2414 /* if is the policy for ipsec ? */
2415 if (sp->policy != IPSEC_POLICY_IPSEC)
2418 /* get length of ipsec requests */
2420 struct ipsecrequest *isr;
2423 for (isr = sp->req; isr != NULL; isr = isr->next) {
2424 len = sizeof(struct sadb_x_ipsecrequest)
2425 + isr->saidx.src.sa.sa_len
2426 + isr->saidx.dst.sa.sa_len;
2428 tlen += PFKEY_ALIGN8(len);
2436 * SADB_SPDEXPIRE processing
2438 * <base, address(SD), lifetime(CH), policy>
2442 * others : error number
2446 struct secpolicy *sp;
2449 struct mbuf *result = NULL, *m;
2452 struct sadb_lifetime *lt;
2454 /* XXX: Why do we lock ? */
2455 s = splnet(); /*called from softclock()*/
2459 panic("key_spdexpire: NULL pointer is passed.\n");
2461 /* set msg header */
2462 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2469 /* create lifetime extension (current and hard) */
2470 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2471 m = key_alloc_mbuf(len);
2472 if (!m || m->m_next) { /*XXX*/
2478 bzero(mtod(m, caddr_t), len);
2479 lt = mtod(m, struct sadb_lifetime *);
2480 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2481 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2482 lt->sadb_lifetime_allocations = 0;
2483 lt->sadb_lifetime_bytes = 0;
2484 lt->sadb_lifetime_addtime = sp->created;
2485 lt->sadb_lifetime_usetime = sp->lastused;
2486 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2487 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2488 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2489 lt->sadb_lifetime_allocations = 0;
2490 lt->sadb_lifetime_bytes = 0;
2491 lt->sadb_lifetime_addtime = sp->lifetime;
2492 lt->sadb_lifetime_usetime = sp->validtime;
2495 /* set sadb_address for source */
2496 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2498 sp->spidx.prefs, sp->spidx.ul_proto);
2505 /* set sadb_address for destination */
2506 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2508 sp->spidx.prefd, sp->spidx.ul_proto);
2523 if ((result->m_flags & M_PKTHDR) == 0) {
2528 if (result->m_len < sizeof(struct sadb_msg)) {
2529 result = m_pullup(result, sizeof(struct sadb_msg));
2530 if (result == NULL) {
2536 result->m_pkthdr.len = 0;
2537 for (m = result; m; m = m->m_next)
2538 result->m_pkthdr.len += m->m_len;
2540 mtod(result, struct sadb_msg *)->sadb_msg_len =
2541 PFKEY_UNIT64(result->m_pkthdr.len);
2543 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2552 /* %%% SAD management */
2554 * allocating a memory for new SA head, and copy from the values of mhp.
2555 * OUT: NULL : failure due to the lack of memory.
2556 * others : pointer to new SA head.
2558 static struct secashead *
2560 struct secasindex *saidx;
2562 struct secashead *newsah;
2564 KASSERT(saidx != NULL, ("key_newsaidx: null saidx"));
2566 newsah = (struct secashead *)
2567 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO);
2568 if (newsah != NULL) {
2570 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++)
2571 LIST_INIT(&newsah->savtree[i]);
2572 newsah->saidx = *saidx;
2574 /* add to saidxtree */
2575 newsah->state = SADB_SASTATE_MATURE;
2576 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2582 * delete SA index and all SA registerd.
2586 struct secashead *sah;
2588 struct secasvar *sav, *nextsav;
2589 u_int stateidx, state;
2595 panic("key_delsah: NULL pointer is passed.\n");
2597 s = splnet(); /*called from softclock()*/
2599 /* searching all SA registerd in the secindex. */
2601 stateidx < _ARRAYLEN(saorder_state_any);
2604 state = saorder_state_any[stateidx];
2605 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2609 nextsav = LIST_NEXT(sav, chain);
2611 if (sav->refcnt == 0) {
2613 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2616 /* give up to delete this sa */
2622 /* don't delete sah only if there are savs. */
2628 if (sah->sa_route.ro_rt) {
2629 RTFREE(sah->sa_route.ro_rt);
2630 sah->sa_route.ro_rt = (struct rtentry *)NULL;
2633 /* remove from tree of SA index */
2634 if (__LIST_CHAINED(sah))
2635 LIST_REMOVE(sah, chain);
2644 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2645 * and copy the values of mhp into new buffer.
2646 * When SAD message type is GETSPI:
2647 * to set sequence number from acq_seq++,
2648 * to set zero to SPI.
2649 * not to call key_setsava().
2651 * others : pointer to new secasvar.
2653 * does not modify mbuf. does not free mbuf on error.
2655 static struct secasvar *
2656 key_newsav(m, mhp, sah, errp, where, tag)
2658 const struct sadb_msghdr *mhp;
2659 struct secashead *sah;
2664 struct secasvar *newsav;
2665 const struct sadb_sa *xsa;
2668 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2669 panic("key_newsa: NULL pointer is passed.\n");
2671 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2672 if (newsav == NULL) {
2673 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2677 bzero((caddr_t)newsav, sizeof(struct secasvar));
2679 switch (mhp->msg->sadb_msg_type) {
2683 #ifdef IPSEC_DOSEQCHECK
2684 /* sync sequence number */
2685 if (mhp->msg->sadb_msg_seq == 0)
2687 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2690 newsav->seq = mhp->msg->sadb_msg_seq;
2695 if (mhp->ext[SADB_EXT_SA] == NULL) {
2696 KFREE(newsav), newsav = NULL;
2697 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2701 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2702 newsav->spi = xsa->sadb_sa_spi;
2703 newsav->seq = mhp->msg->sadb_msg_seq;
2706 KFREE(newsav), newsav = NULL;
2711 /* copy sav values */
2712 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2713 *errp = key_setsaval(newsav, m, mhp);
2715 KFREE(newsav), newsav = NULL;
2721 newsav->created = time_second;
2722 newsav->pid = mhp->msg->sadb_msg_pid;
2727 newsav->state = SADB_SASTATE_LARVAL;
2728 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2731 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
2732 printf("DP key_newsav from %s:%u return SP:%p\n",
2733 where, tag, newsav));
2739 * free() SA variable entry.
2743 struct secasvar *sav;
2745 KASSERT(sav != NULL, ("key_delsav: null sav"));
2746 KASSERT(sav->refcnt == 0,
2747 ("key_delsav: reference count %u > 0", sav->refcnt));
2749 /* remove from SA header */
2750 if (__LIST_CHAINED(sav))
2751 LIST_REMOVE(sav, chain);
2753 if (sav->key_auth != NULL) {
2754 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2755 KFREE(sav->key_auth);
2756 sav->key_auth = NULL;
2758 if (sav->key_enc != NULL) {
2759 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2760 KFREE(sav->key_enc);
2761 sav->key_enc = NULL;
2764 bzero(sav->sched, sav->schedlen);
2768 if (sav->replay != NULL) {
2772 if (sav->lft_c != NULL) {
2776 if (sav->lft_h != NULL) {
2780 if (sav->lft_s != NULL) {
2784 if (sav->iv != NULL) {
2798 * others : found, pointer to a SA.
2800 static struct secashead *
2802 struct secasindex *saidx;
2804 struct secashead *sah;
2806 LIST_FOREACH(sah, &sahtree, chain) {
2807 if (sah->state == SADB_SASTATE_DEAD)
2809 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2817 * check not to be duplicated SPI.
2818 * NOTE: this function is too slow due to searching all SAD.
2821 * others : found, pointer to a SA.
2823 static struct secasvar *
2824 key_checkspidup(saidx, spi)
2825 struct secasindex *saidx;
2828 struct secashead *sah;
2829 struct secasvar *sav;
2831 /* check address family */
2832 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) {
2833 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2838 LIST_FOREACH(sah, &sahtree, chain) {
2839 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2841 sav = key_getsavbyspi(sah, spi);
2850 * search SAD litmited alive SA, protocol, SPI.
2853 * others : found, pointer to a SA.
2855 static struct secasvar *
2856 key_getsavbyspi(sah, spi)
2857 struct secashead *sah;
2860 struct secasvar *sav;
2861 u_int stateidx, state;
2863 /* search all status */
2865 stateidx < _ARRAYLEN(saorder_state_alive);
2868 state = saorder_state_alive[stateidx];
2869 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2872 if (sav->state != state) {
2873 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2874 "invalid sav->state (queue: %d SA: %d)\n",
2875 state, sav->state));
2879 if (sav->spi == spi)
2888 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2889 * You must update these if need.
2893 * does not modify mbuf. does not free mbuf on error.
2896 key_setsaval(sav, m, mhp)
2897 struct secasvar *sav;
2899 const struct sadb_msghdr *mhp;
2904 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2905 panic("key_setsaval: NULL pointer is passed.\n");
2907 /* initialization */
2909 sav->key_auth = NULL;
2910 sav->key_enc = NULL;
2917 sav->tdb_xform = NULL; /* transform */
2918 sav->tdb_encalgxform = NULL; /* encoding algorithm */
2919 sav->tdb_authalgxform = NULL; /* authentication algorithm */
2920 sav->tdb_compalgxform = NULL; /* compression algorithm */
2923 if (mhp->ext[SADB_EXT_SA] != NULL) {
2924 const struct sadb_sa *sa0;
2926 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2927 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
2932 sav->alg_auth = sa0->sadb_sa_auth;
2933 sav->alg_enc = sa0->sadb_sa_encrypt;
2934 sav->flags = sa0->sadb_sa_flags;
2937 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
2938 sav->replay = (struct secreplay *)
2939 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO);
2940 if (sav->replay == NULL) {
2941 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2945 if (sa0->sadb_sa_replay != 0)
2946 sav->replay->bitmap = (caddr_t)(sav->replay+1);
2947 sav->replay->wsize = sa0->sadb_sa_replay;
2951 /* Authentication keys */
2952 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2953 const struct sadb_key *key0;
2956 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2957 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2960 if (len < sizeof(*key0)) {
2964 switch (mhp->msg->sadb_msg_satype) {
2965 case SADB_SATYPE_AH:
2966 case SADB_SATYPE_ESP:
2967 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2968 sav->alg_auth != SADB_X_AALG_NULL)
2971 case SADB_X_SATYPE_IPCOMP:
2977 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2981 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2982 if (sav->key_auth == NULL) {
2983 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2989 /* Encryption key */
2990 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2991 const struct sadb_key *key0;
2994 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2995 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2998 if (len < sizeof(*key0)) {
3002 switch (mhp->msg->sadb_msg_satype) {
3003 case SADB_SATYPE_ESP:
3004 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3005 sav->alg_enc != SADB_EALG_NULL) {
3009 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
3010 if (sav->key_enc == NULL) {
3011 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3016 case SADB_X_SATYPE_IPCOMP:
3017 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3019 sav->key_enc = NULL; /*just in case*/
3021 case SADB_SATYPE_AH:
3027 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3035 switch (mhp->msg->sadb_msg_satype) {
3036 case SADB_SATYPE_AH:
3037 error = xform_init(sav, XF_AH);
3039 case SADB_SATYPE_ESP:
3040 error = xform_init(sav, XF_ESP);
3042 case SADB_X_SATYPE_IPCOMP:
3043 error = xform_init(sav, XF_IPCOMP);
3047 ipseclog((LOG_DEBUG,
3048 "key_setsaval: unable to initialize SA type %u.\n",
3049 mhp->msg->sadb_msg_satype));
3054 sav->created = time_second;
3056 /* make lifetime for CURRENT */
3057 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3058 sizeof(struct sadb_lifetime));
3059 if (sav->lft_c == NULL) {
3060 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3065 sav->lft_c->sadb_lifetime_len =
3066 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3067 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3068 sav->lft_c->sadb_lifetime_allocations = 0;
3069 sav->lft_c->sadb_lifetime_bytes = 0;
3070 sav->lft_c->sadb_lifetime_addtime = time_second;
3071 sav->lft_c->sadb_lifetime_usetime = 0;
3073 /* lifetimes for HARD and SOFT */
3075 const struct sadb_lifetime *lft0;
3077 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3079 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3083 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3085 if (sav->lft_h == NULL) {
3086 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3090 /* to be initialize ? */
3093 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3095 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3099 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3101 if (sav->lft_s == NULL) {
3102 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3106 /* to be initialize ? */
3113 /* initialization */
3114 if (sav->replay != NULL) {
3118 if (sav->key_auth != NULL) {
3119 KFREE(sav->key_auth);
3120 sav->key_auth = NULL;
3122 if (sav->key_enc != NULL) {
3123 KFREE(sav->key_enc);
3124 sav->key_enc = NULL;
3130 if (sav->iv != NULL) {
3134 if (sav->lft_c != NULL) {
3138 if (sav->lft_h != NULL) {
3142 if (sav->lft_s != NULL) {
3151 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3157 struct secasvar *sav;
3161 /* check SPI value */
3162 switch (sav->sah->saidx.proto) {
3165 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3166 ipseclog((LOG_DEBUG,
3167 "key_mature: illegal range of SPI %u.\n",
3168 (u_int32_t)ntohl(sav->spi)));
3175 switch (sav->sah->saidx.proto) {
3178 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) ==
3179 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) {
3180 ipseclog((LOG_DEBUG, "key_mature: "
3181 "invalid flag (derived) given to old-esp.\n"));
3184 error = xform_init(sav, XF_ESP);
3188 if (sav->flags & SADB_X_EXT_DERIV) {
3189 ipseclog((LOG_DEBUG, "key_mature: "
3190 "invalid flag (derived) given to AH SA.\n"));
3193 if (sav->alg_enc != SADB_EALG_NONE) {
3194 ipseclog((LOG_DEBUG, "key_mature: "
3195 "protocol and algorithm mismated.\n"));
3198 error = xform_init(sav, XF_AH);
3200 case IPPROTO_IPCOMP:
3201 if (sav->alg_auth != SADB_AALG_NONE) {
3202 ipseclog((LOG_DEBUG, "key_mature: "
3203 "protocol and algorithm mismated.\n"));
3206 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3207 && ntohl(sav->spi) >= 0x10000) {
3208 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3211 error = xform_init(sav, XF_IPCOMP);
3214 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3215 error = EPROTONOSUPPORT;
3219 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3224 * subroutine for SADB_GET and SADB_DUMP.
3226 static struct mbuf *
3227 key_setdumpsa(sav, type, satype, seq, pid)
3228 struct secasvar *sav;
3229 u_int8_t type, satype;
3232 struct mbuf *result = NULL, *tres = NULL, *m;
3237 SADB_EXT_SA, SADB_X_EXT_SA2,
3238 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3239 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3240 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3241 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3242 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3245 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3250 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3253 switch (dumporder[i]) {
3255 m = key_setsadbsa(sav);
3260 case SADB_X_EXT_SA2:
3261 m = key_setsadbxsa2(sav->sah->saidx.mode,
3262 sav->replay ? sav->replay->count : 0,
3263 sav->sah->saidx.reqid);
3268 case SADB_EXT_ADDRESS_SRC:
3269 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3270 &sav->sah->saidx.src.sa,
3271 FULLMASK, IPSEC_ULPROTO_ANY);
3276 case SADB_EXT_ADDRESS_DST:
3277 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3278 &sav->sah->saidx.dst.sa,
3279 FULLMASK, IPSEC_ULPROTO_ANY);
3284 case SADB_EXT_KEY_AUTH:
3287 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3291 case SADB_EXT_KEY_ENCRYPT:
3294 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3298 case SADB_EXT_LIFETIME_CURRENT:
3301 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3305 case SADB_EXT_LIFETIME_HARD:
3308 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3312 case SADB_EXT_LIFETIME_SOFT:
3315 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3319 case SADB_EXT_ADDRESS_PROXY:
3320 case SADB_EXT_IDENTITY_SRC:
3321 case SADB_EXT_IDENTITY_DST:
3322 /* XXX: should we brought from SPD ? */
3323 case SADB_EXT_SENSITIVITY:
3328 if ((!m && !p) || (m && p))
3331 M_PREPEND(tres, l, M_DONTWAIT);
3334 bcopy(p, mtod(tres, caddr_t), l);
3338 m = key_alloc_mbuf(l);
3341 m_copyback(m, 0, l, p);
3349 m_cat(result, tres);
3351 if (result->m_len < sizeof(struct sadb_msg)) {
3352 result = m_pullup(result, sizeof(struct sadb_msg));
3357 result->m_pkthdr.len = 0;
3358 for (m = result; m; m = m->m_next)
3359 result->m_pkthdr.len += m->m_len;
3361 mtod(result, struct sadb_msg *)->sadb_msg_len =
3362 PFKEY_UNIT64(result->m_pkthdr.len);
3373 * set data into sadb_msg.
3375 static struct mbuf *
3376 key_setsadbmsg(type, tlen, satype, seq, pid, reserved)
3377 u_int8_t type, satype;
3387 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3390 MGETHDR(m, M_DONTWAIT, MT_DATA);
3391 if (m && len > MHLEN) {
3392 MCLGET(m, M_DONTWAIT);
3393 if ((m->m_flags & M_EXT) == 0) {
3400 m->m_pkthdr.len = m->m_len = len;
3403 p = mtod(m, struct sadb_msg *);
3406 p->sadb_msg_version = PF_KEY_V2;
3407 p->sadb_msg_type = type;
3408 p->sadb_msg_errno = 0;
3409 p->sadb_msg_satype = satype;
3410 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3411 p->sadb_msg_reserved = reserved;
3412 p->sadb_msg_seq = seq;
3413 p->sadb_msg_pid = (u_int32_t)pid;
3419 * copy secasvar data into sadb_address.
3421 static struct mbuf *
3423 struct secasvar *sav;
3429 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3430 m = key_alloc_mbuf(len);
3431 if (!m || m->m_next) { /*XXX*/
3437 p = mtod(m, struct sadb_sa *);
3440 p->sadb_sa_len = PFKEY_UNIT64(len);
3441 p->sadb_sa_exttype = SADB_EXT_SA;
3442 p->sadb_sa_spi = sav->spi;
3443 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3444 p->sadb_sa_state = sav->state;
3445 p->sadb_sa_auth = sav->alg_auth;
3446 p->sadb_sa_encrypt = sav->alg_enc;
3447 p->sadb_sa_flags = sav->flags;
3453 * set data into sadb_address.
3455 static struct mbuf *
3456 key_setsadbaddr(exttype, saddr, prefixlen, ul_proto)
3458 const struct sockaddr *saddr;
3463 struct sadb_address *p;
3466 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3467 PFKEY_ALIGN8(saddr->sa_len);
3468 m = key_alloc_mbuf(len);
3469 if (!m || m->m_next) { /*XXX*/
3475 p = mtod(m, struct sadb_address *);
3478 p->sadb_address_len = PFKEY_UNIT64(len);
3479 p->sadb_address_exttype = exttype;
3480 p->sadb_address_proto = ul_proto;
3481 if (prefixlen == FULLMASK) {
3482 switch (saddr->sa_family) {
3484 prefixlen = sizeof(struct in_addr) << 3;
3487 prefixlen = sizeof(struct in6_addr) << 3;
3493 p->sadb_address_prefixlen = prefixlen;
3494 p->sadb_address_reserved = 0;
3497 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3505 * set data into sadb_ident.
3507 static struct mbuf *
3508 key_setsadbident(exttype, idtype, string, stringlen, id)
3509 u_int16_t exttype, idtype;
3515 struct sadb_ident *p;
3518 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3519 m = key_alloc_mbuf(len);
3520 if (!m || m->m_next) { /*XXX*/
3526 p = mtod(m, struct sadb_ident *);
3529 p->sadb_ident_len = PFKEY_UNIT64(len);
3530 p->sadb_ident_exttype = exttype;
3531 p->sadb_ident_type = idtype;
3532 p->sadb_ident_reserved = 0;
3533 p->sadb_ident_id = id;
3536 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3544 * set data into sadb_x_sa2.
3546 static struct mbuf *
3547 key_setsadbxsa2(mode, seq, reqid)
3549 u_int32_t seq, reqid;
3552 struct sadb_x_sa2 *p;
3555 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3556 m = key_alloc_mbuf(len);
3557 if (!m || m->m_next) { /*XXX*/
3563 p = mtod(m, struct sadb_x_sa2 *);
3566 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3567 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3568 p->sadb_x_sa2_mode = mode;
3569 p->sadb_x_sa2_reserved1 = 0;
3570 p->sadb_x_sa2_reserved2 = 0;
3571 p->sadb_x_sa2_sequence = seq;
3572 p->sadb_x_sa2_reqid = reqid;
3578 * set data into sadb_x_policy
3580 static struct mbuf *
3581 key_setsadbxpolicy(type, dir, id)
3587 struct sadb_x_policy *p;
3590 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3591 m = key_alloc_mbuf(len);
3592 if (!m || m->m_next) { /*XXX*/
3598 p = mtod(m, struct sadb_x_policy *);
3601 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3602 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3603 p->sadb_x_policy_type = type;
3604 p->sadb_x_policy_dir = dir;
3605 p->sadb_x_policy_id = id;
3612 * copy a buffer into the new buffer allocated.
3615 key_newbuf(src, len)
3621 KMALLOC(new, caddr_t, len);
3623 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3626 bcopy(src, new, len);
3631 /* compare my own address
3632 * OUT: 1: true, i.e. my address.
3637 struct sockaddr *sa;
3640 struct sockaddr_in *sin;
3641 struct in_ifaddr *ia;
3646 panic("key_ismyaddr: NULL pointer is passed.\n");
3648 switch (sa->sa_family) {
3651 sin = (struct sockaddr_in *)sa;
3652 for (ia = in_ifaddrhead.tqh_first; ia;
3653 ia = ia->ia_link.tqe_next)
3655 if (sin->sin_family == ia->ia_addr.sin_family &&
3656 sin->sin_len == ia->ia_addr.sin_len &&
3657 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3666 return key_ismyaddr6((struct sockaddr_in6 *)sa);
3675 * compare my own address for IPv6.
3678 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3680 #include <netinet6/in6_var.h>
3684 struct sockaddr_in6 *sin6;
3686 struct in6_ifaddr *ia;
3687 struct in6_multi *in6m;
3689 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3690 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3691 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3696 * XXX why do we care about multlicast here while we don't care
3697 * about IPv4 multicast??
3701 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3706 /* loopback, just for safety */
3707 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3715 * compare two secasindex structure.
3716 * flag can specify to compare 2 saidxes.
3717 * compare two secasindex structure without both mode and reqid.
3718 * don't compare port.
3720 * saidx0: source, it can be in SAD.
3728 const struct secasindex *saidx0,
3729 const struct secasindex *saidx1,
3733 if (saidx0 == NULL && saidx1 == NULL)
3736 if (saidx0 == NULL || saidx1 == NULL)
3739 if (saidx0->proto != saidx1->proto)
3742 if (flag == CMP_EXACTLY) {
3743 if (saidx0->mode != saidx1->mode)
3745 if (saidx0->reqid != saidx1->reqid)
3747 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 ||
3748 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0)
3752 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3753 if (flag == CMP_MODE_REQID
3754 ||flag == CMP_REQID) {
3756 * If reqid of SPD is non-zero, unique SA is required.
3757 * The result must be of same reqid in this case.
3759 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3763 if (flag == CMP_MODE_REQID) {
3764 if (saidx0->mode != IPSEC_MODE_ANY
3765 && saidx0->mode != saidx1->mode)
3769 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) {
3772 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) {
3781 * compare two secindex structure exactly.
3783 * spidx0: source, it is often in SPD.
3784 * spidx1: object, it is often from PFKEY message.
3790 key_cmpspidx_exactly(
3791 struct secpolicyindex *spidx0,
3792 struct secpolicyindex *spidx1)
3795 if (spidx0 == NULL && spidx1 == NULL)
3798 if (spidx0 == NULL || spidx1 == NULL)
3801 if (spidx0->prefs != spidx1->prefs
3802 || spidx0->prefd != spidx1->prefd
3803 || spidx0->ul_proto != spidx1->ul_proto)
3806 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
3807 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
3811 * compare two secindex structure with mask.
3813 * spidx0: source, it is often in SPD.
3814 * spidx1: object, it is often from IP header.
3820 key_cmpspidx_withmask(
3821 struct secpolicyindex *spidx0,
3822 struct secpolicyindex *spidx1)
3825 if (spidx0 == NULL && spidx1 == NULL)
3828 if (spidx0 == NULL || spidx1 == NULL)
3831 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
3832 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
3833 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
3834 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
3837 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3838 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3839 && spidx0->ul_proto != spidx1->ul_proto)
3842 switch (spidx0->src.sa.sa_family) {
3844 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
3845 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
3847 if (!key_bbcmp(&spidx0->src.sin.sin_addr,
3848 &spidx1->src.sin.sin_addr, spidx0->prefs))
3852 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
3853 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
3856 * scope_id check. if sin6_scope_id is 0, we regard it
3857 * as a wildcard scope, which matches any scope zone ID.
3859 if (spidx0->src.sin6.sin6_scope_id &&
3860 spidx1->src.sin6.sin6_scope_id &&
3861 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
3863 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
3864 &spidx1->src.sin6.sin6_addr, spidx0->prefs))
3869 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
3874 switch (spidx0->dst.sa.sa_family) {
3876 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
3877 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
3879 if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
3880 &spidx1->dst.sin.sin_addr, spidx0->prefd))
3884 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
3885 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
3888 * scope_id check. if sin6_scope_id is 0, we regard it
3889 * as a wildcard scope, which matches any scope zone ID.
3891 if (spidx0->src.sin6.sin6_scope_id &&
3892 spidx1->src.sin6.sin6_scope_id &&
3893 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
3895 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
3896 &spidx1->dst.sin6.sin6_addr, spidx0->prefd))
3901 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
3906 /* XXX Do we check other field ? e.g. flowinfo */
3911 /* returns 0 on match */
3914 const struct sockaddr *sa1,
3915 const struct sockaddr *sa2,
3921 #define satosin(s) ((const struct sockaddr_in *)s)
3925 #define satosin6(s) ((const struct sockaddr_in6 *)s)
3926 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
3929 switch (sa1->sa_family) {
3931 if (sa1->sa_len != sizeof(struct sockaddr_in))
3933 if (satosin(sa1)->sin_addr.s_addr !=
3934 satosin(sa2)->sin_addr.s_addr) {
3937 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
3941 if (sa1->sa_len != sizeof(struct sockaddr_in6))
3942 return 1; /*EINVAL*/
3943 if (satosin6(sa1)->sin6_scope_id !=
3944 satosin6(sa2)->sin6_scope_id) {
3947 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
3948 &satosin6(sa2)->sin6_addr)) {
3952 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
3956 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
3967 * compare two buffers with mask.
3971 * bits: Number of bits to compare
3977 key_bbcmp(const void *a1, const void *a2, u_int bits)
3979 const unsigned char *p1 = a1;
3980 const unsigned char *p2 = a2;
3982 /* XXX: This could be considerably faster if we compare a word
3983 * at a time, but it is complicated on LSB Endian machines */
3985 /* Handle null pointers */
3986 if (p1 == NULL || p2 == NULL)
3996 u_int8_t mask = ~((1<<(8-bits))-1);
3997 if ((*p1 & mask) != (*p2 & mask))
4000 return 1; /* Match! */
4005 * scanning SPD and SAD to check status for each entries,
4006 * and do to remove or to expire.
4007 * XXX: year 2038 problem may remain.
4010 key_timehandler(void)
4014 time_t now = time_second;
4016 s = splnet(); /*called from softclock()*/
4020 struct secpolicy *sp, *nextsp;
4022 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4023 for (sp = LIST_FIRST(&sptree[dir]);
4027 nextsp = LIST_NEXT(sp, chain);
4029 if (sp->state == IPSEC_SPSTATE_DEAD) {
4034 if (sp->lifetime == 0 && sp->validtime == 0)
4037 /* the deletion will occur next time */
4038 if ((sp->lifetime && now - sp->created > sp->lifetime)
4039 || (sp->validtime && now - sp->lastused > sp->validtime)) {
4040 sp->state = IPSEC_SPSTATE_DEAD;
4050 struct secashead *sah, *nextsah;
4051 struct secasvar *sav, *nextsav;
4053 for (sah = LIST_FIRST(&sahtree);
4057 nextsah = LIST_NEXT(sah, chain);
4059 /* if sah has been dead, then delete it and process next sah. */
4060 if (sah->state == SADB_SASTATE_DEAD) {
4065 /* if LARVAL entry doesn't become MATURE, delete it. */
4066 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
4070 nextsav = LIST_NEXT(sav, chain);
4072 if (now - sav->created > key_larval_lifetime) {
4078 * check MATURE entry to start to send expire message
4081 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
4085 nextsav = LIST_NEXT(sav, chain);
4087 /* we don't need to check. */
4088 if (sav->lft_s == NULL)
4092 if (sav->lft_c == NULL) {
4093 ipseclog((LOG_DEBUG,"key_timehandler: "
4094 "There is no CURRENT time, why?\n"));
4098 /* check SOFT lifetime */
4099 if (sav->lft_s->sadb_lifetime_addtime != 0
4100 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4102 * check SA to be used whether or not.
4103 * when SA hasn't been used, delete it.
4105 if (sav->lft_c->sadb_lifetime_usetime == 0) {
4106 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4109 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4111 * XXX If we keep to send expire
4112 * message in the status of
4113 * DYING. Do remove below code.
4118 /* check SOFT lifetime by bytes */
4120 * XXX I don't know the way to delete this SA
4121 * when new SA is installed. Caution when it's
4122 * installed too big lifetime by time.
4124 else if (sav->lft_s->sadb_lifetime_bytes != 0
4125 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4127 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4129 * XXX If we keep to send expire
4130 * message in the status of
4131 * DYING. Do remove below code.
4137 /* check DYING entry to change status to DEAD. */
4138 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
4142 nextsav = LIST_NEXT(sav, chain);
4144 /* we don't need to check. */
4145 if (sav->lft_h == NULL)
4149 if (sav->lft_c == NULL) {
4150 ipseclog((LOG_DEBUG, "key_timehandler: "
4151 "There is no CURRENT time, why?\n"));
4155 if (sav->lft_h->sadb_lifetime_addtime != 0
4156 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) {
4157 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4160 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4161 else if (sav->lft_s != NULL
4162 && sav->lft_s->sadb_lifetime_addtime != 0
4163 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4165 * XXX: should be checked to be
4166 * installed the valid SA.
4170 * If there is no SA then sending
4176 /* check HARD lifetime by bytes */
4177 else if (sav->lft_h->sadb_lifetime_bytes != 0
4178 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4179 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4184 /* delete entry in DEAD */
4185 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
4189 nextsav = LIST_NEXT(sav, chain);
4192 if (sav->state != SADB_SASTATE_DEAD) {
4193 ipseclog((LOG_DEBUG, "key_timehandler: "
4194 "invalid sav->state "
4195 "(queue: %d SA: %d): "
4197 SADB_SASTATE_DEAD, sav->state));
4201 * do not call key_freesav() here.
4202 * sav should already be freed, and sav->refcnt
4203 * shows other references to sav
4204 * (such as from SPD).
4210 #ifndef IPSEC_NONBLOCK_ACQUIRE
4213 struct secacq *acq, *nextacq;
4215 for (acq = LIST_FIRST(&acqtree);
4219 nextacq = LIST_NEXT(acq, chain);
4221 if (now - acq->created > key_blockacq_lifetime
4222 && __LIST_CHAINED(acq)) {
4223 LIST_REMOVE(acq, chain);
4232 struct secspacq *acq, *nextacq;
4234 for (acq = LIST_FIRST(&spacqtree);
4238 nextacq = LIST_NEXT(acq, chain);
4240 if (now - acq->created > key_blockacq_lifetime
4241 && __LIST_CHAINED(acq)) {
4242 LIST_REMOVE(acq, chain);
4248 /* initialize random seed */
4249 if (key_tick_init_random++ > key_int_random) {
4250 key_tick_init_random = 0;
4254 #ifndef IPSEC_DEBUG2
4255 /* do exchange to tick time !! */
4256 (void)timeout((void *)key_timehandler, (void *)0, hz);
4257 #endif /* IPSEC_DEBUG2 */
4264 * to initialize a seed for random()
4269 srandom(time_second);
4277 key_randomfill(&value, sizeof(value));
4282 key_randomfill(p, l)
4288 static int warn = 1;
4291 n = (size_t)read_random(p, (u_int)l);
4295 bcopy(&v, (u_int8_t *)p + n,
4296 l - n < sizeof(v) ? l - n : sizeof(v));
4300 printf("WARNING: pseudo-random number generator "
4301 "used for IPsec processing\n");
4308 * map SADB_SATYPE_* to IPPROTO_*.
4309 * if satype == SADB_SATYPE then satype is mapped to ~0.
4311 * 0: invalid satype.
4314 key_satype2proto(satype)
4318 case SADB_SATYPE_UNSPEC:
4319 return IPSEC_PROTO_ANY;
4320 case SADB_SATYPE_AH:
4322 case SADB_SATYPE_ESP:
4324 case SADB_X_SATYPE_IPCOMP:
4325 return IPPROTO_IPCOMP;
4333 * map IPPROTO_* to SADB_SATYPE_*
4335 * 0: invalid protocol type.
4338 key_proto2satype(proto)
4343 return SADB_SATYPE_AH;
4345 return SADB_SATYPE_ESP;
4346 case IPPROTO_IPCOMP:
4347 return SADB_X_SATYPE_IPCOMP;
4356 * SADB_GETSPI processing is to receive
4357 * <base, (SA2), src address, dst address, (SPI range)>
4358 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4359 * tree with the status of LARVAL, and send
4360 * <base, SA(*), address(SD)>
4363 * IN: mhp: pointer to the pointer to each header.
4364 * OUT: NULL if fail.
4365 * other if success, return pointer to the message to send.
4368 key_getspi(so, m, mhp)
4371 const struct sadb_msghdr *mhp;
4373 struct sadb_address *src0, *dst0;
4374 struct secasindex saidx;
4375 struct secashead *newsah;
4376 struct secasvar *newsav;
4384 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4385 panic("key_getspi: NULL pointer is passed.\n");
4387 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4388 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4389 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4390 return key_senderror(so, m, EINVAL);
4392 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4393 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4394 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4395 return key_senderror(so, m, EINVAL);
4397 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4398 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4399 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4401 mode = IPSEC_MODE_ANY;
4405 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4406 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4408 /* map satype to proto */
4409 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4410 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
4411 return key_senderror(so, m, EINVAL);
4414 /* make sure if port number is zero. */
4415 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
4417 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4418 sizeof(struct sockaddr_in))
4419 return key_senderror(so, m, EINVAL);
4420 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
4423 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4424 sizeof(struct sockaddr_in6))
4425 return key_senderror(so, m, EINVAL);
4426 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
4431 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
4433 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4434 sizeof(struct sockaddr_in))
4435 return key_senderror(so, m, EINVAL);
4436 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
4439 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4440 sizeof(struct sockaddr_in6))
4441 return key_senderror(so, m, EINVAL);
4442 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
4448 /* XXX boundary check against sa_len */
4449 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4451 /* SPI allocation */
4452 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4455 return key_senderror(so, m, EINVAL);
4457 /* get a SA index */
4458 if ((newsah = key_getsah(&saidx)) == NULL) {
4459 /* create a new SA index */
4460 if ((newsah = key_newsah(&saidx)) == NULL) {
4461 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
4462 return key_senderror(so, m, ENOBUFS);
4468 newsav = KEY_NEWSAV(m, mhp, newsah, &error);
4469 if (newsav == NULL) {
4470 /* XXX don't free new SA index allocated in above. */
4471 return key_senderror(so, m, error);
4475 newsav->spi = htonl(spi);
4477 #ifndef IPSEC_NONBLOCK_ACQUIRE
4478 /* delete the entry in acqtree */
4479 if (mhp->msg->sadb_msg_seq != 0) {
4481 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4482 /* reset counter in order to deletion by timehandler. */
4483 acq->created = time_second;
4490 struct mbuf *n, *nn;
4491 struct sadb_sa *m_sa;
4492 struct sadb_msg *newmsg;
4495 /* create new sadb_msg to reply. */
4496 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4497 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4499 return key_senderror(so, m, ENOBUFS);
4501 MGETHDR(n, M_DONTWAIT, MT_DATA);
4503 MCLGET(n, M_DONTWAIT);
4504 if ((n->m_flags & M_EXT) == 0) {
4510 return key_senderror(so, m, ENOBUFS);
4516 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4517 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4519 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4520 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4521 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4522 m_sa->sadb_sa_spi = htonl(spi);
4523 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4527 panic("length inconsistency in key_getspi");
4530 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4531 SADB_EXT_ADDRESS_DST);
4534 return key_senderror(so, m, ENOBUFS);
4537 if (n->m_len < sizeof(struct sadb_msg)) {
4538 n = m_pullup(n, sizeof(struct sadb_msg));
4540 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4543 n->m_pkthdr.len = 0;
4544 for (nn = n; nn; nn = nn->m_next)
4545 n->m_pkthdr.len += nn->m_len;
4547 newmsg = mtod(n, struct sadb_msg *);
4548 newmsg->sadb_msg_seq = newsav->seq;
4549 newmsg->sadb_msg_errno = 0;
4550 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4553 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4558 * allocating new SPI
4559 * called by key_getspi().
4565 key_do_getnewspi(spirange, saidx)
4566 struct sadb_spirange *spirange;
4567 struct secasindex *saidx;
4571 int count = key_spi_trycnt;
4573 /* set spi range to allocate */
4574 if (spirange != NULL) {
4575 min = spirange->sadb_spirange_min;
4576 max = spirange->sadb_spirange_max;
4578 min = key_spi_minval;
4579 max = key_spi_maxval;
4581 /* IPCOMP needs 2-byte SPI */
4582 if (saidx->proto == IPPROTO_IPCOMP) {
4589 t = min; min = max; max = t;
4594 if (key_checkspidup(saidx, min) != NULL) {
4595 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min));
4599 count--; /* taking one cost. */
4607 /* when requesting to allocate spi ranged */
4609 /* generate pseudo-random SPI value ranged. */
4610 newspi = min + (key_random() % (max - min + 1));
4612 if (key_checkspidup(saidx, newspi) == NULL)
4616 if (count == 0 || newspi == 0) {
4617 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
4623 keystat.getspi_count =
4624 (keystat.getspi_count + key_spi_trycnt - count) / 2;
4630 * SADB_UPDATE processing
4632 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4633 * key(AE), (identity(SD),) (sensitivity)>
4634 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
4636 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4637 * (identity(SD),) (sensitivity)>
4640 * m will always be freed.
4643 key_update(so, m, mhp)
4646 const struct sadb_msghdr *mhp;
4648 struct sadb_sa *sa0;
4649 struct sadb_address *src0, *dst0;
4650 struct secasindex saidx;
4651 struct secashead *sah;
4652 struct secasvar *sav;
4659 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4660 panic("key_update: NULL pointer is passed.\n");
4662 /* map satype to proto */
4663 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4664 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
4665 return key_senderror(so, m, EINVAL);
4668 if (mhp->ext[SADB_EXT_SA] == NULL ||
4669 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4670 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4671 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4672 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4673 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4674 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4675 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4676 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4677 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4678 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4679 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4680 return key_senderror(so, m, EINVAL);
4682 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4683 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4684 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4685 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4686 return key_senderror(so, m, EINVAL);
4688 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4689 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4690 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4692 mode = IPSEC_MODE_ANY;
4695 /* XXX boundary checking for other extensions */
4697 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4698 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4699 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4701 /* XXX boundary check against sa_len */
4702 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4704 /* get a SA header */
4705 if ((sah = key_getsah(&saidx)) == NULL) {
4706 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
4707 return key_senderror(so, m, ENOENT);
4710 /* set spidx if there */
4712 error = key_setident(sah, m, mhp);
4714 return key_senderror(so, m, error);
4716 /* find a SA with sequence number. */
4717 #ifdef IPSEC_DOSEQCHECK
4718 if (mhp->msg->sadb_msg_seq != 0
4719 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
4720 ipseclog((LOG_DEBUG,
4721 "key_update: no larval SA with sequence %u exists.\n",
4722 mhp->msg->sadb_msg_seq));
4723 return key_senderror(so, m, ENOENT);
4726 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
4727 ipseclog((LOG_DEBUG,
4728 "key_update: no such a SA found (spi:%u)\n",
4729 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4730 return key_senderror(so, m, EINVAL);
4734 /* validity check */
4735 if (sav->sah->saidx.proto != proto) {
4736 ipseclog((LOG_DEBUG,
4737 "key_update: protocol mismatched (DB=%u param=%u)\n",
4738 sav->sah->saidx.proto, proto));
4739 return key_senderror(so, m, EINVAL);
4741 #ifdef IPSEC_DOSEQCHECK
4742 if (sav->spi != sa0->sadb_sa_spi) {
4743 ipseclog((LOG_DEBUG,
4744 "key_update: SPI mismatched (DB:%u param:%u)\n",
4745 (u_int32_t)ntohl(sav->spi),
4746 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4747 return key_senderror(so, m, EINVAL);
4750 if (sav->pid != mhp->msg->sadb_msg_pid) {
4751 ipseclog((LOG_DEBUG,
4752 "key_update: pid mismatched (DB:%u param:%u)\n",
4753 sav->pid, mhp->msg->sadb_msg_pid));
4754 return key_senderror(so, m, EINVAL);
4757 /* copy sav values */
4758 error = key_setsaval(sav, m, mhp);
4761 return key_senderror(so, m, error);
4764 /* check SA values to be mature. */
4765 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
4767 return key_senderror(so, m, 0);
4773 /* set msg buf from mhp */
4774 n = key_getmsgbuf_x1(m, mhp);
4776 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
4777 return key_senderror(so, m, ENOBUFS);
4781 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
4786 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
4787 * only called by key_update().
4790 * others : found, pointer to a SA.
4792 #ifdef IPSEC_DOSEQCHECK
4793 static struct secasvar *
4794 key_getsavbyseq(sah, seq)
4795 struct secashead *sah;
4798 struct secasvar *sav;
4801 state = SADB_SASTATE_LARVAL;
4803 /* search SAD with sequence number ? */
4804 LIST_FOREACH(sav, &sah->savtree[state], chain) {
4806 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
4808 if (sav->seq == seq) {
4810 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
4811 printf("DP key_getsavbyseq cause "
4812 "refcnt++:%d SA:%p\n",
4823 * SADB_ADD processing
4824 * add an entry to SA database, when received
4825 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4826 * key(AE), (identity(SD),) (sensitivity)>
4829 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4830 * (identity(SD),) (sensitivity)>
4833 * IGNORE identity and sensitivity messages.
4835 * m will always be freed.
4841 const struct sadb_msghdr *mhp;
4843 struct sadb_sa *sa0;
4844 struct sadb_address *src0, *dst0;
4845 struct secasindex saidx;
4846 struct secashead *newsah;
4847 struct secasvar *newsav;
4854 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4855 panic("key_add: NULL pointer is passed.\n");
4857 /* map satype to proto */
4858 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4859 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
4860 return key_senderror(so, m, EINVAL);
4863 if (mhp->ext[SADB_EXT_SA] == NULL ||
4864 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4865 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4866 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4867 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4868 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4869 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4870 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4871 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4872 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4873 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4874 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4875 return key_senderror(so, m, EINVAL);
4877 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4878 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4879 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4881 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4882 return key_senderror(so, m, EINVAL);
4884 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4885 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4886 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4888 mode = IPSEC_MODE_ANY;
4892 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4893 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
4894 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
4896 /* XXX boundary check against sa_len */
4897 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4899 /* get a SA header */
4900 if ((newsah = key_getsah(&saidx)) == NULL) {
4901 /* create a new SA header */
4902 if ((newsah = key_newsah(&saidx)) == NULL) {
4903 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
4904 return key_senderror(so, m, ENOBUFS);
4908 /* set spidx if there */
4910 error = key_setident(newsah, m, mhp);
4912 return key_senderror(so, m, error);
4915 /* create new SA entry. */
4916 /* We can create new SA only if SPI is differenct. */
4917 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
4918 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
4919 return key_senderror(so, m, EEXIST);
4921 newsav = KEY_NEWSAV(m, mhp, newsah, &error);
4922 if (newsav == NULL) {
4923 return key_senderror(so, m, error);
4926 /* check SA values to be mature. */
4927 if ((error = key_mature(newsav)) != 0) {
4928 KEY_FREESAV(&newsav);
4929 return key_senderror(so, m, error);
4933 * don't call key_freesav() here, as we would like to keep the SA
4934 * in the database on success.
4940 /* set msg buf from mhp */
4941 n = key_getmsgbuf_x1(m, mhp);
4943 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
4944 return key_senderror(so, m, ENOBUFS);
4948 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
4954 key_setident(sah, m, mhp)
4955 struct secashead *sah;
4957 const struct sadb_msghdr *mhp;
4959 const struct sadb_ident *idsrc, *iddst;
4960 int idsrclen, iddstlen;
4963 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4964 panic("key_setident: NULL pointer is passed.\n");
4966 /* don't make buffer if not there */
4967 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
4968 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
4974 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
4975 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
4976 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
4980 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
4981 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
4982 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
4983 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
4985 /* validity check */
4986 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
4987 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
4991 switch (idsrc->sadb_ident_type) {
4992 case SADB_IDENTTYPE_PREFIX:
4993 case SADB_IDENTTYPE_FQDN:
4994 case SADB_IDENTTYPE_USERFQDN:
4996 /* XXX do nothing */
5002 /* make structure */
5003 KMALLOC(sah->idents, struct sadb_ident *, idsrclen);
5004 if (sah->idents == NULL) {
5005 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5008 KMALLOC(sah->identd, struct sadb_ident *, iddstlen);
5009 if (sah->identd == NULL) {
5012 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5015 bcopy(idsrc, sah->idents, idsrclen);
5016 bcopy(iddst, sah->identd, iddstlen);
5022 * m will not be freed on return.
5023 * it is caller's responsibility to free the result.
5025 static struct mbuf *
5026 key_getmsgbuf_x1(m, mhp)
5028 const struct sadb_msghdr *mhp;
5033 if (m == NULL || mhp == NULL || mhp->msg == NULL)
5034 panic("key_getmsgbuf_x1: NULL pointer is passed.\n");
5036 /* create new sadb_msg to reply. */
5037 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5038 SADB_EXT_SA, SADB_X_EXT_SA2,
5039 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5040 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5041 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5045 if (n->m_len < sizeof(struct sadb_msg)) {
5046 n = m_pullup(n, sizeof(struct sadb_msg));
5050 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5051 mtod(n, struct sadb_msg *)->sadb_msg_len =
5052 PFKEY_UNIT64(n->m_pkthdr.len);
5057 static int key_delete_all __P((struct socket *, struct mbuf *,
5058 const struct sadb_msghdr *, u_int16_t));
5061 * SADB_DELETE processing
5063 * <base, SA(*), address(SD)>
5064 * from the ikmpd, and set SADB_SASTATE_DEAD,
5066 * <base, SA(*), address(SD)>
5069 * m will always be freed.
5072 key_delete(so, m, mhp)
5075 const struct sadb_msghdr *mhp;
5077 struct sadb_sa *sa0;
5078 struct sadb_address *src0, *dst0;
5079 struct secasindex saidx;
5080 struct secashead *sah;
5081 struct secasvar *sav = NULL;
5085 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5086 panic("key_delete: NULL pointer is passed.\n");
5088 /* map satype to proto */
5089 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5090 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
5091 return key_senderror(so, m, EINVAL);
5094 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5095 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5096 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5097 return key_senderror(so, m, EINVAL);
5100 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5101 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5102 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5103 return key_senderror(so, m, EINVAL);
5106 if (mhp->ext[SADB_EXT_SA] == NULL) {
5108 * Caller wants us to delete all non-LARVAL SAs
5109 * that match the src/dst. This is used during
5110 * IKE INITIAL-CONTACT.
5112 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
5113 return key_delete_all(so, m, mhp, proto);
5114 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5115 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5116 return key_senderror(so, m, EINVAL);
5119 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5120 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5121 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5123 /* XXX boundary check against sa_len */
5124 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5126 /* get a SA header */
5127 LIST_FOREACH(sah, &sahtree, chain) {
5128 if (sah->state == SADB_SASTATE_DEAD)
5130 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5133 /* get a SA with SPI. */
5134 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5139 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
5140 return key_senderror(so, m, ENOENT);
5143 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5148 struct sadb_msg *newmsg;
5150 /* create new sadb_msg to reply. */
5151 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5152 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5154 return key_senderror(so, m, ENOBUFS);
5156 if (n->m_len < sizeof(struct sadb_msg)) {
5157 n = m_pullup(n, sizeof(struct sadb_msg));
5159 return key_senderror(so, m, ENOBUFS);
5161 newmsg = mtod(n, struct sadb_msg *);
5162 newmsg->sadb_msg_errno = 0;
5163 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5166 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5171 * delete all SAs for src/dst. Called from key_delete().
5174 key_delete_all(so, m, mhp, proto)
5177 const struct sadb_msghdr *mhp;
5180 struct sadb_address *src0, *dst0;
5181 struct secasindex saidx;
5182 struct secashead *sah;
5183 struct secasvar *sav, *nextsav;
5184 u_int stateidx, state;
5186 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5187 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5189 /* XXX boundary check against sa_len */
5190 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5192 LIST_FOREACH(sah, &sahtree, chain) {
5193 if (sah->state == SADB_SASTATE_DEAD)
5195 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5198 /* Delete all non-LARVAL SAs. */
5200 stateidx < _ARRAYLEN(saorder_state_alive);
5202 state = saorder_state_alive[stateidx];
5203 if (state == SADB_SASTATE_LARVAL)
5205 for (sav = LIST_FIRST(&sah->savtree[state]);
5206 sav != NULL; sav = nextsav) {
5207 nextsav = LIST_NEXT(sav, chain);
5209 if (sav->state != state) {
5210 ipseclog((LOG_DEBUG, "key_delete_all: "
5211 "invalid sav->state "
5212 "(queue: %d SA: %d)\n",
5213 state, sav->state));
5217 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5224 struct sadb_msg *newmsg;
5226 /* create new sadb_msg to reply. */
5227 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5228 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5230 return key_senderror(so, m, ENOBUFS);
5232 if (n->m_len < sizeof(struct sadb_msg)) {
5233 n = m_pullup(n, sizeof(struct sadb_msg));
5235 return key_senderror(so, m, ENOBUFS);
5237 newmsg = mtod(n, struct sadb_msg *);
5238 newmsg->sadb_msg_errno = 0;
5239 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5242 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5247 * SADB_GET processing
5249 * <base, SA(*), address(SD)>
5250 * from the ikmpd, and get a SP and a SA to respond,
5252 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5253 * (identity(SD),) (sensitivity)>
5256 * m will always be freed.
5262 const struct sadb_msghdr *mhp;
5264 struct sadb_sa *sa0;
5265 struct sadb_address *src0, *dst0;
5266 struct secasindex saidx;
5267 struct secashead *sah;
5268 struct secasvar *sav = NULL;
5272 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5273 panic("key_get: NULL pointer is passed.\n");
5275 /* map satype to proto */
5276 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5277 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
5278 return key_senderror(so, m, EINVAL);
5281 if (mhp->ext[SADB_EXT_SA] == NULL ||
5282 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5283 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5284 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5285 return key_senderror(so, m, EINVAL);
5287 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5288 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5289 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5290 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5291 return key_senderror(so, m, EINVAL);
5294 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5295 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5296 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5298 /* XXX boundary check against sa_len */
5299 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5301 /* get a SA header */
5302 LIST_FOREACH(sah, &sahtree, chain) {
5303 if (sah->state == SADB_SASTATE_DEAD)
5305 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5308 /* get a SA with SPI. */
5309 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5314 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
5315 return key_senderror(so, m, ENOENT);
5322 /* map proto to satype */
5323 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5324 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
5325 return key_senderror(so, m, EINVAL);
5328 /* create new sadb_msg to reply. */
5329 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5330 mhp->msg->sadb_msg_pid);
5332 return key_senderror(so, m, ENOBUFS);
5335 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5339 /* XXX make it sysctl-configurable? */
5341 key_getcomb_setlifetime(comb)
5342 struct sadb_comb *comb;
5345 comb->sadb_comb_soft_allocations = 1;
5346 comb->sadb_comb_hard_allocations = 1;
5347 comb->sadb_comb_soft_bytes = 0;
5348 comb->sadb_comb_hard_bytes = 0;
5349 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5350 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5351 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5352 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5356 * XXX reorder combinations by preference
5357 * XXX no idea if the user wants ESP authentication or not
5359 static struct mbuf *
5362 struct sadb_comb *comb;
5363 struct enc_xform *algo;
5364 struct mbuf *result = NULL, *m, *n;
5368 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5371 for (i = 1; i <= SADB_EALG_MAX; i++) {
5372 algo = esp_algorithm_lookup(i);
5376 /* discard algorithms with key size smaller than system min */
5377 if (_BITS(algo->maxkey) < ipsec_esp_keymin)
5379 if (_BITS(algo->minkey) < ipsec_esp_keymin)
5380 encmin = ipsec_esp_keymin;
5382 encmin = _BITS(algo->minkey);
5385 m = key_getcomb_ah();
5388 ("key_getcomb_esp: l=%u > MLEN=%lu",
5390 MGET(m, M_DONTWAIT, MT_DATA);
5395 bzero(mtod(m, caddr_t), m->m_len);
5402 for (n = m; n; n = n->m_next)
5404 KASSERT((totlen % l) == 0,
5405 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l));
5407 for (off = 0; off < totlen; off += l) {
5408 n = m_pulldown(m, off, l, &o);
5410 /* m is already freed */
5413 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
5414 bzero(comb, sizeof(*comb));
5415 key_getcomb_setlifetime(comb);
5416 comb->sadb_comb_encrypt = i;
5417 comb->sadb_comb_encrypt_minbits = encmin;
5418 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey);
5437 const struct auth_hash *ah,
5442 *min = *max = ah->keysize;
5443 if (ah->keysize == 0) {
5445 * Transform takes arbitrary key size but algorithm
5446 * key size is restricted. Enforce this here.
5449 case SADB_X_AALG_MD5: *min = *max = 16; break;
5450 case SADB_X_AALG_SHA: *min = *max = 20; break;
5451 case SADB_X_AALG_NULL: *min = 1; *max = 256; break;
5453 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n",
5461 * XXX reorder combinations by preference
5463 static struct mbuf *
5466 struct sadb_comb *comb;
5467 struct auth_hash *algo;
5469 u_int16_t minkeysize, maxkeysize;
5471 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5474 for (i = 1; i <= SADB_AALG_MAX; i++) {
5476 /* we prefer HMAC algorithms, not old algorithms */
5477 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
5480 algo = ah_algorithm_lookup(i);
5483 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize);
5484 /* discard algorithms with key size smaller than system min */
5485 if (_BITS(minkeysize) < ipsec_ah_keymin)
5490 ("key_getcomb_ah: l=%u > MLEN=%lu",
5492 MGET(m, M_DONTWAIT, MT_DATA);
5499 M_PREPEND(m, l, M_DONTWAIT);
5503 comb = mtod(m, struct sadb_comb *);
5504 bzero(comb, sizeof(*comb));
5505 key_getcomb_setlifetime(comb);
5506 comb->sadb_comb_auth = i;
5507 comb->sadb_comb_auth_minbits = _BITS(minkeysize);
5508 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize);
5515 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
5516 * XXX reorder combinations by preference
5518 static struct mbuf *
5519 key_getcomb_ipcomp()
5521 struct sadb_comb *comb;
5522 struct comp_algo *algo;
5525 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5528 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
5529 algo = ipcomp_algorithm_lookup(i);
5535 ("key_getcomb_ipcomp: l=%u > MLEN=%lu",
5537 MGET(m, M_DONTWAIT, MT_DATA);
5544 M_PREPEND(m, l, M_DONTWAIT);
5548 comb = mtod(m, struct sadb_comb *);
5549 bzero(comb, sizeof(*comb));
5550 key_getcomb_setlifetime(comb);
5551 comb->sadb_comb_encrypt = i;
5552 /* what should we set into sadb_comb_*_{min,max}bits? */
5559 * XXX no way to pass mode (transport/tunnel) to userland
5560 * XXX replay checking?
5561 * XXX sysctl interface to ipsec_{ah,esp}_keymin
5563 static struct mbuf *
5565 const struct secasindex *saidx;
5567 struct sadb_prop *prop;
5569 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
5572 switch (saidx->proto) {
5574 m = key_getcomb_esp();
5577 m = key_getcomb_ah();
5579 case IPPROTO_IPCOMP:
5580 m = key_getcomb_ipcomp();
5588 M_PREPEND(m, l, M_DONTWAIT);
5593 for (n = m; n; n = n->m_next)
5596 prop = mtod(m, struct sadb_prop *);
5597 bzero(prop, sizeof(*prop));
5598 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
5599 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
5600 prop->sadb_prop_replay = 32; /* XXX */
5606 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
5608 * <base, SA, address(SD), (address(P)), x_policy,
5609 * (identity(SD),) (sensitivity,) proposal>
5610 * to KMD, and expect to receive
5611 * <base> with SADB_ACQUIRE if error occured,
5613 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
5614 * from KMD by PF_KEY.
5616 * XXX x_policy is outside of RFC2367 (KAME extension).
5617 * XXX sensitivity is not supported.
5618 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
5619 * see comment for key_getcomb_ipcomp().
5623 * others: error number
5626 key_acquire(const struct secasindex *saidx, struct secpolicy *sp)
5628 struct mbuf *result = NULL, *m;
5629 #ifndef IPSEC_NONBLOCK_ACQUIRE
5630 struct secacq *newacq;
5637 KASSERT(saidx != NULL, ("key_acquire: null saidx"));
5638 satype = key_proto2satype(saidx->proto);
5639 KASSERT(satype != 0,
5640 ("key_acquire: null satype, protocol %u", saidx->proto));
5642 #ifndef IPSEC_NONBLOCK_ACQUIRE
5644 * We never do anything about acquirng SA. There is anather
5645 * solution that kernel blocks to send SADB_ACQUIRE message until
5646 * getting something message from IKEd. In later case, to be
5647 * managed with ACQUIRING list.
5649 /* Get an entry to check whether sending message or not. */
5650 if ((newacq = key_getacq(saidx)) != NULL) {
5651 if (key_blockacq_count < newacq->count) {
5652 /* reset counter and do send message. */
5655 /* increment counter and do nothing. */
5660 /* make new entry for blocking to send SADB_ACQUIRE. */
5661 if ((newacq = key_newacq(saidx)) == NULL)
5664 /* add to acqtree */
5665 LIST_INSERT_HEAD(&acqtree, newacq, chain);
5670 #ifndef IPSEC_NONBLOCK_ACQUIRE
5673 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
5675 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
5682 /* set sadb_address for saidx's. */
5683 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
5684 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY);
5691 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
5692 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY);
5699 /* XXX proxy address (optional) */
5701 /* set sadb_x_policy */
5703 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
5711 /* XXX identity (optional) */
5713 if (idexttype && fqdn) {
5714 /* create identity extension (FQDN) */
5715 struct sadb_ident *id;
5718 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
5719 id = (struct sadb_ident *)p;
5720 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5721 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5722 id->sadb_ident_exttype = idexttype;
5723 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
5724 bcopy(fqdn, id + 1, fqdnlen);
5725 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
5729 /* create identity extension (USERFQDN) */
5730 struct sadb_ident *id;
5734 /* +1 for terminating-NUL */
5735 userfqdnlen = strlen(userfqdn) + 1;
5738 id = (struct sadb_ident *)p;
5739 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5740 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5741 id->sadb_ident_exttype = idexttype;
5742 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
5743 /* XXX is it correct? */
5744 if (curproc && curproc->p_cred)
5745 id->sadb_ident_id = curproc->p_cred->p_ruid;
5746 if (userfqdn && userfqdnlen)
5747 bcopy(userfqdn, id + 1, userfqdnlen);
5748 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
5752 /* XXX sensitivity (optional) */
5754 /* create proposal/combination extension */
5755 m = key_getprop(saidx);
5758 * spec conformant: always attach proposal/combination extension,
5759 * the problem is that we have no way to attach it for ipcomp,
5760 * due to the way sadb_comb is declared in RFC2367.
5769 * outside of spec; make proposal/combination extension optional.
5775 if ((result->m_flags & M_PKTHDR) == 0) {
5780 if (result->m_len < sizeof(struct sadb_msg)) {
5781 result = m_pullup(result, sizeof(struct sadb_msg));
5782 if (result == NULL) {
5788 result->m_pkthdr.len = 0;
5789 for (m = result; m; m = m->m_next)
5790 result->m_pkthdr.len += m->m_len;
5792 mtod(result, struct sadb_msg *)->sadb_msg_len =
5793 PFKEY_UNIT64(result->m_pkthdr.len);
5795 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
5803 #ifndef IPSEC_NONBLOCK_ACQUIRE
5804 static struct secacq *
5805 key_newacq(const struct secasindex *saidx)
5807 struct secacq *newacq;
5810 KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
5811 if (newacq == NULL) {
5812 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
5815 bzero(newacq, sizeof(*newacq));
5818 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
5819 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
5820 newacq->created = time_second;
5826 static struct secacq *
5827 key_getacq(const struct secasindex *saidx)
5831 LIST_FOREACH(acq, &acqtree, chain) {
5832 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
5839 static struct secacq *
5840 key_getacqbyseq(seq)
5845 LIST_FOREACH(acq, &acqtree, chain) {
5846 if (acq->seq == seq)
5854 static struct secspacq *
5856 struct secpolicyindex *spidx;
5858 struct secspacq *acq;
5861 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq));
5863 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
5866 bzero(acq, sizeof(*acq));
5869 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
5870 acq->created = time_second;
5876 static struct secspacq *
5878 struct secpolicyindex *spidx;
5880 struct secspacq *acq;
5882 LIST_FOREACH(acq, &spacqtree, chain) {
5883 if (key_cmpspidx_exactly(spidx, &acq->spidx))
5891 * SADB_ACQUIRE processing,
5892 * in first situation, is receiving
5894 * from the ikmpd, and clear sequence of its secasvar entry.
5896 * In second situation, is receiving
5897 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5898 * from a user land process, and return
5899 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5902 * m will always be freed.
5905 key_acquire2(so, m, mhp)
5908 const struct sadb_msghdr *mhp;
5910 const struct sadb_address *src0, *dst0;
5911 struct secasindex saidx;
5912 struct secashead *sah;
5917 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5918 panic("key_acquire2: NULL pointer is passed.\n");
5921 * Error message from KMd.
5922 * We assume that if error was occured in IKEd, the length of PFKEY
5923 * message is equal to the size of sadb_msg structure.
5924 * We do not raise error even if error occured in this function.
5926 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
5927 #ifndef IPSEC_NONBLOCK_ACQUIRE
5930 /* check sequence number */
5931 if (mhp->msg->sadb_msg_seq == 0) {
5932 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
5937 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
5939 * the specified larval SA is already gone, or we got
5940 * a bogus sequence number. we can silently ignore it.
5946 /* reset acq counter in order to deletion by timehander. */
5947 acq->created = time_second;
5955 * This message is from user land.
5958 /* map satype to proto */
5959 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5960 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
5961 return key_senderror(so, m, EINVAL);
5964 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5965 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
5966 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
5968 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
5969 return key_senderror(so, m, EINVAL);
5971 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5972 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
5973 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
5975 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
5976 return key_senderror(so, m, EINVAL);
5979 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5980 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5982 /* XXX boundary check against sa_len */
5983 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5985 /* get a SA index */
5986 LIST_FOREACH(sah, &sahtree, chain) {
5987 if (sah->state == SADB_SASTATE_DEAD)
5989 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
5993 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
5994 return key_senderror(so, m, EEXIST);
5997 error = key_acquire(&saidx, NULL);
5999 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
6000 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
6001 return key_senderror(so, m, error);
6004 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6008 * SADB_REGISTER processing.
6009 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6012 * from the ikmpd, and register a socket to send PF_KEY messages,
6016 * If socket is detached, must free from regnode.
6018 * m will always be freed.
6021 key_register(so, m, mhp)
6024 const struct sadb_msghdr *mhp;
6026 struct secreg *reg, *newreg = 0;
6029 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6030 panic("key_register: NULL pointer is passed.\n");
6032 /* check for invalid register message */
6033 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0]))
6034 return key_senderror(so, m, EINVAL);
6036 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6037 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6040 /* check whether existing or not */
6041 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) {
6042 if (reg->so == so) {
6043 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
6044 return key_senderror(so, m, EEXIST);
6048 /* create regnode */
6049 KMALLOC(newreg, struct secreg *, sizeof(*newreg));
6050 if (newreg == NULL) {
6051 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
6052 return key_senderror(so, m, ENOBUFS);
6054 bzero((caddr_t)newreg, sizeof(*newreg));
6057 ((struct keycb *)sotorawcb(so))->kp_registered++;
6059 /* add regnode to regtree. */
6060 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain);
6065 struct sadb_msg *newmsg;
6066 struct sadb_supported *sup;
6067 u_int len, alen, elen;
6070 struct sadb_alg *alg;
6072 /* create new sadb_msg to reply. */
6074 for (i = 1; i <= SADB_AALG_MAX; i++) {
6075 if (ah_algorithm_lookup(i))
6076 alen += sizeof(struct sadb_alg);
6079 alen += sizeof(struct sadb_supported);
6081 for (i = 1; i <= SADB_EALG_MAX; i++) {
6082 if (esp_algorithm_lookup(i))
6083 elen += sizeof(struct sadb_alg);
6086 elen += sizeof(struct sadb_supported);
6088 len = sizeof(struct sadb_msg) + alen + elen;
6091 return key_senderror(so, m, ENOBUFS);
6093 MGETHDR(n, M_DONTWAIT, MT_DATA);
6095 MCLGET(n, M_DONTWAIT);
6096 if ((n->m_flags & M_EXT) == 0) {
6102 return key_senderror(so, m, ENOBUFS);
6104 n->m_pkthdr.len = n->m_len = len;
6108 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6109 newmsg = mtod(n, struct sadb_msg *);
6110 newmsg->sadb_msg_errno = 0;
6111 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6112 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6114 /* for authentication algorithm */
6116 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6117 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6118 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6119 off += PFKEY_ALIGN8(sizeof(*sup));
6121 for (i = 1; i <= SADB_AALG_MAX; i++) {
6122 struct auth_hash *aalgo;
6123 u_int16_t minkeysize, maxkeysize;
6125 aalgo = ah_algorithm_lookup(i);
6128 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6129 alg->sadb_alg_id = i;
6130 alg->sadb_alg_ivlen = 0;
6131 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize);
6132 alg->sadb_alg_minbits = _BITS(minkeysize);
6133 alg->sadb_alg_maxbits = _BITS(maxkeysize);
6134 off += PFKEY_ALIGN8(sizeof(*alg));
6138 /* for encryption algorithm */
6140 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6141 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6142 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6143 off += PFKEY_ALIGN8(sizeof(*sup));
6145 for (i = 1; i <= SADB_EALG_MAX; i++) {
6146 struct enc_xform *ealgo;
6148 ealgo = esp_algorithm_lookup(i);
6151 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6152 alg->sadb_alg_id = i;
6153 alg->sadb_alg_ivlen = ealgo->blocksize;
6154 alg->sadb_alg_minbits = _BITS(ealgo->minkey);
6155 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey);
6156 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6162 panic("length assumption failed in key_register");
6166 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6171 * free secreg entry registered.
6172 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6183 panic("key_freereg: NULL pointer is passed.\n");
6186 * check whether existing or not.
6187 * check all type of SA, because there is a potential that
6188 * one socket is registered to multiple type of SA.
6190 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6191 LIST_FOREACH(reg, ®tree[i], chain) {
6193 && __LIST_CHAINED(reg)) {
6194 LIST_REMOVE(reg, chain);
6205 * SADB_EXPIRE processing
6207 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6209 * NOTE: We send only soft lifetime extension.
6212 * others : error number
6216 struct secasvar *sav;
6220 struct mbuf *result = NULL, *m;
6223 struct sadb_lifetime *lt;
6225 /* XXX: Why do we lock ? */
6226 s = splnet(); /*called from softclock()*/
6230 panic("key_expire: NULL pointer is passed.\n");
6231 if (sav->sah == NULL)
6232 panic("key_expire: Why was SA index in SA NULL.\n");
6233 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
6234 panic("key_expire: invalid proto is passed.\n");
6236 /* set msg header */
6237 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6244 /* create SA extension */
6245 m = key_setsadbsa(sav);
6252 /* create SA extension */
6253 m = key_setsadbxsa2(sav->sah->saidx.mode,
6254 sav->replay ? sav->replay->count : 0,
6255 sav->sah->saidx.reqid);
6262 /* create lifetime extension (current and soft) */
6263 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6264 m = key_alloc_mbuf(len);
6265 if (!m || m->m_next) { /*XXX*/
6271 bzero(mtod(m, caddr_t), len);
6272 lt = mtod(m, struct sadb_lifetime *);
6273 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6274 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6275 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
6276 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
6277 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
6278 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
6279 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
6280 bcopy(sav->lft_s, lt, sizeof(*lt));
6283 /* set sadb_address for source */
6284 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6285 &sav->sah->saidx.src.sa,
6286 FULLMASK, IPSEC_ULPROTO_ANY);
6293 /* set sadb_address for destination */
6294 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6295 &sav->sah->saidx.dst.sa,
6296 FULLMASK, IPSEC_ULPROTO_ANY);
6303 if ((result->m_flags & M_PKTHDR) == 0) {
6308 if (result->m_len < sizeof(struct sadb_msg)) {
6309 result = m_pullup(result, sizeof(struct sadb_msg));
6310 if (result == NULL) {
6316 result->m_pkthdr.len = 0;
6317 for (m = result; m; m = m->m_next)
6318 result->m_pkthdr.len += m->m_len;
6320 mtod(result, struct sadb_msg *)->sadb_msg_len =
6321 PFKEY_UNIT64(result->m_pkthdr.len);
6324 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6334 * SADB_FLUSH processing
6337 * from the ikmpd, and free all entries in secastree.
6341 * NOTE: to do is only marking SADB_SASTATE_DEAD.
6343 * m will always be freed.
6346 key_flush(so, m, mhp)
6349 const struct sadb_msghdr *mhp;
6351 struct sadb_msg *newmsg;
6352 struct secashead *sah, *nextsah;
6353 struct secasvar *sav, *nextsav;
6359 if (so == NULL || mhp == NULL || mhp->msg == NULL)
6360 panic("key_flush: NULL pointer is passed.\n");
6362 /* map satype to proto */
6363 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6364 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
6365 return key_senderror(so, m, EINVAL);
6368 /* no SATYPE specified, i.e. flushing all SA. */
6369 for (sah = LIST_FIRST(&sahtree);
6372 nextsah = LIST_NEXT(sah, chain);
6374 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6375 && proto != sah->saidx.proto)
6379 stateidx < _ARRAYLEN(saorder_state_alive);
6381 state = saorder_state_any[stateidx];
6382 for (sav = LIST_FIRST(&sah->savtree[state]);
6386 nextsav = LIST_NEXT(sav, chain);
6388 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6393 sah->state = SADB_SASTATE_DEAD;
6396 if (m->m_len < sizeof(struct sadb_msg) ||
6397 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
6398 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
6399 return key_senderror(so, m, ENOBUFS);
6405 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
6406 newmsg = mtod(m, struct sadb_msg *);
6407 newmsg->sadb_msg_errno = 0;
6408 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
6410 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6414 * SADB_DUMP processing
6415 * dump all entries including status of DEAD in SAD.
6418 * from the ikmpd, and dump all secasvar leaves
6423 * m will always be freed.
6426 key_dump(so, m, mhp)
6429 const struct sadb_msghdr *mhp;
6431 struct secashead *sah;
6432 struct secasvar *sav;
6438 struct sadb_msg *newmsg;
6442 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6443 panic("key_dump: NULL pointer is passed.\n");
6445 /* map satype to proto */
6446 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6447 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
6448 return key_senderror(so, m, EINVAL);
6451 /* count sav entries to be sent to the userland. */
6453 LIST_FOREACH(sah, &sahtree, chain) {
6454 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6455 && proto != sah->saidx.proto)
6459 stateidx < _ARRAYLEN(saorder_state_any);
6461 state = saorder_state_any[stateidx];
6462 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6469 return key_senderror(so, m, ENOENT);
6471 /* send this to the userland, one at a time. */
6473 LIST_FOREACH(sah, &sahtree, chain) {
6474 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6475 && proto != sah->saidx.proto)
6478 /* map proto to satype */
6479 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
6480 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n"));
6481 return key_senderror(so, m, EINVAL);
6485 stateidx < _ARRAYLEN(saorder_state_any);
6487 state = saorder_state_any[stateidx];
6488 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6489 n = key_setdumpsa(sav, SADB_DUMP, satype,
6490 --cnt, mhp->msg->sadb_msg_pid);
6492 return key_senderror(so, m, ENOBUFS);
6494 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6504 * SADB_X_PROMISC processing
6506 * m will always be freed.
6509 key_promisc(so, m, mhp)
6512 const struct sadb_msghdr *mhp;
6517 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6518 panic("key_promisc: NULL pointer is passed.\n");
6520 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6522 if (olen < sizeof(struct sadb_msg)) {
6524 return key_senderror(so, m, EINVAL);
6529 } else if (olen == sizeof(struct sadb_msg)) {
6530 /* enable/disable promisc mode */
6533 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
6534 return key_senderror(so, m, EINVAL);
6535 mhp->msg->sadb_msg_errno = 0;
6536 switch (mhp->msg->sadb_msg_satype) {
6539 kp->kp_promisc = mhp->msg->sadb_msg_satype;
6542 return key_senderror(so, m, EINVAL);
6545 /* send the original message back to everyone */
6546 mhp->msg->sadb_msg_errno = 0;
6547 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6549 /* send packet as is */
6551 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
6553 /* TODO: if sadb_msg_seq is specified, send to specific pid */
6554 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6558 static int (*key_typesw[]) __P((struct socket *, struct mbuf *,
6559 const struct sadb_msghdr *)) = {
6560 NULL, /* SADB_RESERVED */
6561 key_getspi, /* SADB_GETSPI */
6562 key_update, /* SADB_UPDATE */
6563 key_add, /* SADB_ADD */
6564 key_delete, /* SADB_DELETE */
6565 key_get, /* SADB_GET */
6566 key_acquire2, /* SADB_ACQUIRE */
6567 key_register, /* SADB_REGISTER */
6568 NULL, /* SADB_EXPIRE */
6569 key_flush, /* SADB_FLUSH */
6570 key_dump, /* SADB_DUMP */
6571 key_promisc, /* SADB_X_PROMISC */
6572 NULL, /* SADB_X_PCHANGE */
6573 key_spdadd, /* SADB_X_SPDUPDATE */
6574 key_spdadd, /* SADB_X_SPDADD */
6575 key_spddelete, /* SADB_X_SPDDELETE */
6576 key_spdget, /* SADB_X_SPDGET */
6577 NULL, /* SADB_X_SPDACQUIRE */
6578 key_spddump, /* SADB_X_SPDDUMP */
6579 key_spdflush, /* SADB_X_SPDFLUSH */
6580 key_spdadd, /* SADB_X_SPDSETIDX */
6581 NULL, /* SADB_X_SPDEXPIRE */
6582 key_spddelete2, /* SADB_X_SPDDELETE2 */
6586 * parse sadb_msg buffer to process PFKEYv2,
6587 * and create a data to response if needed.
6588 * I think to be dealed with mbuf directly.
6590 * msgp : pointer to pointer to a received buffer pulluped.
6591 * This is rewrited to response.
6592 * so : pointer to socket.
6594 * length for buffer to send to user process.
6601 struct sadb_msg *msg;
6602 struct sadb_msghdr mh;
6608 if (m == NULL || so == NULL)
6609 panic("key_parse: NULL pointer is passed.\n");
6611 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
6612 KEYDEBUG(KEYDEBUG_KEY_DUMP,
6613 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
6617 if (m->m_len < sizeof(struct sadb_msg)) {
6618 m = m_pullup(m, sizeof(struct sadb_msg));
6622 msg = mtod(m, struct sadb_msg *);
6623 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
6624 target = KEY_SENDUP_ONE;
6626 if ((m->m_flags & M_PKTHDR) == 0 ||
6627 m->m_pkthdr.len != m->m_pkthdr.len) {
6628 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
6629 pfkeystat.out_invlen++;
6634 if (msg->sadb_msg_version != PF_KEY_V2) {
6635 ipseclog((LOG_DEBUG,
6636 "key_parse: PF_KEY version %u is mismatched.\n",
6637 msg->sadb_msg_version));
6638 pfkeystat.out_invver++;
6643 if (msg->sadb_msg_type > SADB_MAX) {
6644 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6645 msg->sadb_msg_type));
6646 pfkeystat.out_invmsgtype++;
6651 /* for old-fashioned code - should be nuked */
6652 if (m->m_pkthdr.len > MCLBYTES) {
6659 MGETHDR(n, M_DONTWAIT, MT_DATA);
6660 if (n && m->m_pkthdr.len > MHLEN) {
6661 MCLGET(n, M_DONTWAIT);
6662 if ((n->m_flags & M_EXT) == 0) {
6671 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
6672 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
6678 /* align the mbuf chain so that extensions are in contiguous region. */
6679 error = key_align(m, &mh);
6683 if (m->m_next) { /*XXX*/
6691 switch (msg->sadb_msg_satype) {
6692 case SADB_SATYPE_UNSPEC:
6693 switch (msg->sadb_msg_type) {
6701 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
6702 "when msg type=%u.\n", msg->sadb_msg_type));
6703 pfkeystat.out_invsatype++;
6708 case SADB_SATYPE_AH:
6709 case SADB_SATYPE_ESP:
6710 case SADB_X_SATYPE_IPCOMP:
6711 switch (msg->sadb_msg_type) {
6713 case SADB_X_SPDDELETE:
6715 case SADB_X_SPDDUMP:
6716 case SADB_X_SPDFLUSH:
6717 case SADB_X_SPDSETIDX:
6718 case SADB_X_SPDUPDATE:
6719 case SADB_X_SPDDELETE2:
6720 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
6721 msg->sadb_msg_type));
6722 pfkeystat.out_invsatype++;
6727 case SADB_SATYPE_RSVP:
6728 case SADB_SATYPE_OSPFV2:
6729 case SADB_SATYPE_RIPV2:
6730 case SADB_SATYPE_MIP:
6731 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
6732 msg->sadb_msg_satype));
6733 pfkeystat.out_invsatype++;
6736 case 1: /* XXX: What does it do? */
6737 if (msg->sadb_msg_type == SADB_X_PROMISC)
6741 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6742 msg->sadb_msg_satype));
6743 pfkeystat.out_invsatype++;
6748 /* check field of upper layer protocol and address family */
6749 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
6750 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
6751 struct sadb_address *src0, *dst0;
6754 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
6755 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
6757 /* check upper layer protocol */
6758 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
6759 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
6760 pfkeystat.out_invaddr++;
6766 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
6767 PFKEY_ADDR_SADDR(dst0)->sa_family) {
6768 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
6769 pfkeystat.out_invaddr++;
6773 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6774 PFKEY_ADDR_SADDR(dst0)->sa_len) {
6775 ipseclog((LOG_DEBUG,
6776 "key_parse: address struct size mismatched.\n"));
6777 pfkeystat.out_invaddr++;
6782 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6784 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6785 sizeof(struct sockaddr_in)) {
6786 pfkeystat.out_invaddr++;
6792 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6793 sizeof(struct sockaddr_in6)) {
6794 pfkeystat.out_invaddr++;
6800 ipseclog((LOG_DEBUG,
6801 "key_parse: unsupported address family.\n"));
6802 pfkeystat.out_invaddr++;
6803 error = EAFNOSUPPORT;
6807 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6809 plen = sizeof(struct in_addr) << 3;
6812 plen = sizeof(struct in6_addr) << 3;
6815 plen = 0; /*fool gcc*/
6819 /* check max prefix length */
6820 if (src0->sadb_address_prefixlen > plen ||
6821 dst0->sadb_address_prefixlen > plen) {
6822 ipseclog((LOG_DEBUG,
6823 "key_parse: illegal prefixlen.\n"));
6824 pfkeystat.out_invaddr++;
6830 * prefixlen == 0 is valid because there can be a case when
6831 * all addresses are matched.
6835 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
6836 key_typesw[msg->sadb_msg_type] == NULL) {
6837 pfkeystat.out_invmsgtype++;
6842 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
6845 msg->sadb_msg_errno = error;
6846 return key_sendup_mbuf(so, m, target);
6850 key_senderror(so, m, code)
6855 struct sadb_msg *msg;
6857 if (m->m_len < sizeof(struct sadb_msg))
6858 panic("invalid mbuf passed to key_senderror");
6860 msg = mtod(m, struct sadb_msg *);
6861 msg->sadb_msg_errno = code;
6862 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
6866 * set the pointer to each header into message buffer.
6867 * m will be freed on error.
6868 * XXX larger-than-MCLBYTES extension?
6873 struct sadb_msghdr *mhp;
6876 struct sadb_ext *ext;
6882 if (m == NULL || mhp == NULL)
6883 panic("key_align: NULL pointer is passed.\n");
6884 if (m->m_len < sizeof(struct sadb_msg))
6885 panic("invalid mbuf passed to key_align");
6888 bzero(mhp, sizeof(*mhp));
6890 mhp->msg = mtod(m, struct sadb_msg *);
6891 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
6893 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6894 extlen = end; /*just in case extlen is not updated*/
6895 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
6896 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
6898 /* m is already freed */
6901 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
6904 switch (ext->sadb_ext_type) {
6906 case SADB_EXT_ADDRESS_SRC:
6907 case SADB_EXT_ADDRESS_DST:
6908 case SADB_EXT_ADDRESS_PROXY:
6909 case SADB_EXT_LIFETIME_CURRENT:
6910 case SADB_EXT_LIFETIME_HARD:
6911 case SADB_EXT_LIFETIME_SOFT:
6912 case SADB_EXT_KEY_AUTH:
6913 case SADB_EXT_KEY_ENCRYPT:
6914 case SADB_EXT_IDENTITY_SRC:
6915 case SADB_EXT_IDENTITY_DST:
6916 case SADB_EXT_SENSITIVITY:
6917 case SADB_EXT_PROPOSAL:
6918 case SADB_EXT_SUPPORTED_AUTH:
6919 case SADB_EXT_SUPPORTED_ENCRYPT:
6920 case SADB_EXT_SPIRANGE:
6921 case SADB_X_EXT_POLICY:
6922 case SADB_X_EXT_SA2:
6923 /* duplicate check */
6925 * XXX Are there duplication payloads of either
6926 * KEY_AUTH or KEY_ENCRYPT ?
6928 if (mhp->ext[ext->sadb_ext_type] != NULL) {
6929 ipseclog((LOG_DEBUG,
6930 "key_align: duplicate ext_type %u "
6931 "is passed.\n", ext->sadb_ext_type));
6933 pfkeystat.out_dupext++;
6938 ipseclog((LOG_DEBUG,
6939 "key_align: invalid ext_type %u is passed.\n",
6940 ext->sadb_ext_type));
6942 pfkeystat.out_invexttype++;
6946 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
6948 if (key_validate_ext(ext, extlen)) {
6950 pfkeystat.out_invlen++;
6954 n = m_pulldown(m, off, extlen, &toff);
6956 /* m is already freed */
6959 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
6961 mhp->ext[ext->sadb_ext_type] = ext;
6962 mhp->extoff[ext->sadb_ext_type] = off;
6963 mhp->extlen[ext->sadb_ext_type] = extlen;
6968 pfkeystat.out_invlen++;
6976 key_validate_ext(ext, len)
6977 const struct sadb_ext *ext;
6980 const struct sockaddr *sa;
6981 enum { NONE, ADDR } checktype = NONE;
6983 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
6985 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
6988 /* if it does not match minimum/maximum length, bail */
6989 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
6990 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
6992 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
6994 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
6997 /* more checks based on sadb_ext_type XXX need more */
6998 switch (ext->sadb_ext_type) {
6999 case SADB_EXT_ADDRESS_SRC:
7000 case SADB_EXT_ADDRESS_DST:
7001 case SADB_EXT_ADDRESS_PROXY:
7002 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7005 case SADB_EXT_IDENTITY_SRC:
7006 case SADB_EXT_IDENTITY_DST:
7007 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7008 SADB_X_IDENTTYPE_ADDR) {
7009 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7019 switch (checktype) {
7023 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen);
7024 if (len < baselen + sal)
7026 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7039 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7040 LIST_INIT(&sptree[i]);
7043 LIST_INIT(&sahtree);
7045 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7046 LIST_INIT(®tree[i]);
7049 #ifndef IPSEC_NONBLOCK_ACQUIRE
7050 LIST_INIT(&acqtree);
7052 LIST_INIT(&spacqtree);
7054 /* system default */
7055 ip4_def_policy.policy = IPSEC_POLICY_NONE;
7056 ip4_def_policy.refcnt++; /*never reclaim this*/
7058 #ifndef IPSEC_DEBUG2
7059 timeout((void *)key_timehandler, (void *)0, hz);
7060 #endif /*IPSEC_DEBUG2*/
7062 /* initialize key statistics */
7063 keystat.getspi_count = 1;
7065 printf("IPsec: Initialized Security Association Processing.\n");
7071 * XXX: maybe This function is called after INBOUND IPsec processing.
7073 * Special check for tunnel-mode packets.
7074 * We must make some checks for consistency between inner and outer IP header.
7076 * xxx more checks to be provided
7079 key_checktunnelsanity(sav, family, src, dst)
7080 struct secasvar *sav;
7086 if (sav->sah == NULL)
7087 panic("sav->sah == NULL at key_checktunnelsanity");
7089 /* XXX: check inner IP header */
7095 #define hostnamelen strlen(hostname)
7098 * Get FQDN for the host.
7099 * If the administrator configured hostname (by hostname(1)) without
7100 * domain name, returns nothing.
7107 static char fqdn[MAXHOSTNAMELEN + 1];
7112 /* check if it comes with domain name. */
7114 for (i = 0; i < hostnamelen; i++) {
7115 if (hostname[i] == '.')
7121 /* NOTE: hostname may not be NUL-terminated. */
7122 bzero(fqdn, sizeof(fqdn));
7123 bcopy(hostname, fqdn, hostnamelen);
7124 fqdn[hostnamelen] = '\0';
7129 * get username@FQDN for the host/user.
7135 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
7136 struct proc *p = curproc;
7139 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
7141 if (!(host = key_getfqdn()))
7144 /* NOTE: s_login may not be-NUL terminated. */
7145 bzero(userfqdn, sizeof(userfqdn));
7146 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME);
7147 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
7148 q = userfqdn + strlen(userfqdn);
7150 bcopy(host, q, strlen(host));
7158 /* record data transfer on SA, and update timestamps */
7160 key_sa_recordxfer(sav, m)
7161 struct secasvar *sav;
7164 KASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar"));
7165 KASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf"));
7170 * XXX Currently, there is a difference of bytes size
7171 * between inbound and outbound processing.
7173 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
7174 /* to check bytes lifetime is done in key_timehandler(). */
7177 * We use the number of packets as the unit of
7178 * sadb_lifetime_allocations. We increment the variable
7179 * whenever {esp,ah}_{in,out}put is called.
7181 sav->lft_c->sadb_lifetime_allocations++;
7182 /* XXX check for expires? */
7185 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
7186 * in seconds. HARD and SOFT lifetime are measured by the time
7187 * difference (again in seconds) from sadb_lifetime_usetime.
7191 * -----+-----+--------+---> t
7192 * <--------------> HARD
7195 sav->lft_c->sadb_lifetime_usetime = time_second;
7196 /* XXX check for expires? */
7203 key_sa_routechange(dst)
7204 struct sockaddr *dst;
7206 struct secashead *sah;
7209 LIST_FOREACH(sah, &sahtree, chain) {
7210 ro = &sah->sa_route;
7211 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
7212 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
7214 ro->ro_rt = (struct rtentry *)NULL;
7222 key_sa_chgstate(sav, state)
7223 struct secasvar *sav;
7227 panic("key_sa_chgstate called with sav == NULL");
7229 if (sav->state == state)
7232 if (__LIST_CHAINED(sav))
7233 LIST_REMOVE(sav, chain);
7236 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7241 struct secasvar *sav;
7245 panic("key_sa_stir_iv called with sav == NULL");
7246 key_randomfill(sav->iv, sav->ivlen);
7250 static struct mbuf *
7254 struct mbuf *m = NULL, *n;
7259 MGET(n, M_DONTWAIT, MT_DATA);
7260 if (n && len > MLEN)
7261 MCLGET(n, M_DONTWAIT);
7269 n->m_len = M_TRAILINGSPACE(n);
7270 /* use the bottom of mbuf, hoping we can prepend afterwards */
7271 if (n->m_len > len) {
7272 t = (n->m_len - len) & ~(sizeof(long) - 1);