1 /* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */
2 /* $DragonFly: src/sys/netproto/key/key.c,v 1.21 2008/06/08 08:38:05 sephe 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>
57 #include <sys/thread2.h>
60 #include <net/route.h>
61 #include <net/raw_cb.h>
63 #include <netinet/in.h>
64 #include <netinet/in_systm.h>
65 #include <netinet/ip.h>
66 #include <netinet/in_var.h>
69 #include <netinet/ip6.h>
70 #include <netinet6/in6_var.h>
71 #include <netinet6/ip6_var.h>
75 #include <netinet/in_pcb.h>
78 #include <netinet6/in6_pcb.h>
81 #include <net/pfkeyv2.h>
85 #include "key_debug.h"
87 #include <netinet6/ipsec.h>
89 #include <netinet6/ipsec6.h>
91 #include <netinet6/ah.h>
93 #include <netinet6/ah6.h>
96 #include <netinet6/esp.h>
98 #include <netinet6/esp6.h>
101 #include <netinet6/ipcomp.h>
103 #include <netinet6/ipcomp6.h>
106 #include <machine/stdarg.h>
109 #include <sys/random.h>
111 #include <net/net_osdep.h>
114 #define satosin(s) ((struct sockaddr_in *)s)
117 #define FULLMASK 0xff
120 * Note on SA reference counting:
121 * - SAs that are not in DEAD state will have (total external reference + 1)
122 * following value in reference count field. they cannot be freed and are
123 * referenced from SA header.
124 * - SAs that are in DEAD state will have (total external reference)
125 * in reference count field. they are ready to be freed. reference from
126 * SA header will be removed in key_delsav(), when the reference count
127 * field hits 0 (= no external reference other than from SA header.
131 static struct callout key_timehandler_ch;
133 u_int32_t key_debug_level = 0;
134 static u_int key_spi_trycnt = 1000;
135 static u_int32_t key_spi_minval = 0x100;
136 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
137 static u_int32_t policy_id = 0;
138 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
139 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
140 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
141 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
142 static int key_preferred_oldsa = 1; /* preferred old sa rather than new sa.*/
144 static u_int32_t acq_seq = 0;
145 static int key_tick_init_random = 0;
147 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
148 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
149 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
151 #ifndef IPSEC_NONBLOCK_ACQUIRE
152 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
154 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
156 struct lwkt_token key_token = LWKT_TOKEN_MP_INITIALIZER(key_token);
158 struct key_cb key_cb;
160 /* search order for SAs */
161 static const u_int saorder_state_valid_prefer_old[] = {
162 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
164 static const u_int saorder_state_valid_prefer_new[] = {
165 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
167 static const u_int saorder_state_alive[] = {
169 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
171 static const u_int saorder_state_any[] = {
172 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
173 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
176 static const int minsize[] = {
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 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
183 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
184 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
185 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
186 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
187 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
188 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
189 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
190 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
191 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
192 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
193 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
194 0, /* SADB_X_EXT_KMPRIVATE */
195 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
196 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
198 static const int maxsize[] = {
199 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
200 sizeof(struct sadb_sa), /* SADB_EXT_SA */
201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
202 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
203 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
204 0, /* SADB_EXT_ADDRESS_SRC */
205 0, /* SADB_EXT_ADDRESS_DST */
206 0, /* SADB_EXT_ADDRESS_PROXY */
207 0, /* SADB_EXT_KEY_AUTH */
208 0, /* SADB_EXT_KEY_ENCRYPT */
209 0, /* SADB_EXT_IDENTITY_SRC */
210 0, /* SADB_EXT_IDENTITY_DST */
211 0, /* SADB_EXT_SENSITIVITY */
212 0, /* SADB_EXT_PROPOSAL */
213 0, /* SADB_EXT_SUPPORTED_AUTH */
214 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
215 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
216 0, /* SADB_X_EXT_KMPRIVATE */
217 0, /* SADB_X_EXT_POLICY */
218 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
221 static int ipsec_esp_keymin = 256;
222 static int ipsec_esp_auth = 0;
223 static int ipsec_ah_keymin = 128;
226 SYSCTL_DECL(_net_key);
229 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
230 &key_debug_level, 0, "");
232 /* max count of trial for the decision of spi value */
233 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
234 &key_spi_trycnt, 0, "");
236 /* minimum spi value to allocate automatically. */
237 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
238 &key_spi_minval, 0, "");
240 /* maximun spi value to allocate automatically. */
241 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
242 &key_spi_maxval, 0, "");
244 /* interval to initialize randseed */
245 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
246 &key_int_random, 0, "");
248 /* lifetime for larval SA */
249 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
250 &key_larval_lifetime, 0, "");
252 /* counter for blocking to send SADB_ACQUIRE to IKEd */
253 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
254 &key_blockacq_count, 0, "");
256 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
257 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
258 &key_blockacq_lifetime, 0, "");
261 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
262 &ipsec_esp_auth, 0, "");
264 /* minimum ESP key length */
265 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
266 &ipsec_esp_keymin, 0, "");
268 /* minimum AH key length */
269 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
270 &ipsec_ah_keymin, 0, "");
272 /* perfered old SA rather than new SA */
273 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
274 &key_preferred_oldsa, 0, "");
277 #define LIST_FOREACH(elm, head, field) \
278 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
280 #define __LIST_CHAINED(elm) \
281 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
282 #define LIST_INSERT_TAIL(head, elm, type, field) \
284 struct type *curelm = LIST_FIRST(head); \
285 if (curelm == NULL) {\
286 LIST_INSERT_HEAD(head, elm, field); \
288 while (LIST_NEXT(curelm, field)) \
289 curelm = LIST_NEXT(curelm, field);\
290 LIST_INSERT_AFTER(curelm, elm, field);\
294 #define KEY_CHKSASTATE(head, sav, name) \
296 if ((head) != (sav)) { \
297 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
298 (name), (head), (sav))); \
303 #define KEY_CHKSPDIR(head, sp, name) \
305 if ((head) != (sp)) { \
306 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
307 "anyway continue.\n", \
308 (name), (head), (sp))); \
313 #define KMALLOC(p, t, n) \
314 ((p) = (t) kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK))
316 kfree((caddr_t)(p), M_SECA);
318 #define KMALLOC(p, t, n) \
320 ((p) = (t)kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK)); \
321 kprintf("%s %d: %p <- KMALLOC(%s, %d)\n", \
322 __FILE__, __LINE__, (p), #t, n); \
327 kprintf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
328 kfree((caddr_t)(p), M_SECA); \
333 * set parameters into secpolicyindex buffer.
334 * Must allocate secpolicyindex buffer passed to this function.
336 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
338 bzero((idx), sizeof(struct secpolicyindex)); \
339 (idx)->dir = (_dir); \
340 (idx)->prefs = (ps); \
341 (idx)->prefd = (pd); \
342 (idx)->ul_proto = (ulp); \
343 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
344 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
348 * set parameters into secasindex buffer.
349 * Must allocate secasindex buffer before calling this function.
351 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
353 bzero((idx), sizeof(struct secasindex)); \
354 (idx)->proto = (p); \
356 (idx)->reqid = (r); \
357 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
358 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
363 u_long getspi_count; /* the avarage of count to try to get new SPI */
367 struct sadb_msg *msg;
368 struct sadb_ext *ext[SADB_EXT_MAX + 1];
369 int extoff[SADB_EXT_MAX + 1];
370 int extlen[SADB_EXT_MAX + 1];
373 static struct secasvar *key_allocsa_policy (struct secasindex *);
374 static void key_freesp_so (struct secpolicy **);
375 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
376 static void key_delsp (struct secpolicy *);
377 static struct secpolicy *key_getsp (struct secpolicyindex *);
378 static struct secpolicy *key_getspbyid (u_int32_t);
379 static u_int32_t key_newreqid (void);
380 static struct mbuf *key_gather_mbuf (struct mbuf *,
381 const struct sadb_msghdr *, int, int, ...);
382 static int key_spdadd (struct socket *, struct mbuf *,
383 const struct sadb_msghdr *);
384 static u_int32_t key_getnewspid (void);
385 static int key_spddelete (struct socket *, struct mbuf *,
386 const struct sadb_msghdr *);
387 static int key_spddelete2 (struct socket *, struct mbuf *,
388 const struct sadb_msghdr *);
389 static int key_spdget (struct socket *, struct mbuf *,
390 const struct sadb_msghdr *);
391 static int key_spdflush (struct socket *, struct mbuf *,
392 const struct sadb_msghdr *);
393 static int key_spddump (struct socket *, struct mbuf *,
394 const struct sadb_msghdr *);
395 static struct mbuf *key_setdumpsp (struct secpolicy *,
396 u_int8_t, u_int32_t, u_int32_t);
397 static u_int key_getspreqmsglen (struct secpolicy *);
398 static int key_spdexpire (struct secpolicy *);
399 static struct secashead *key_newsah (struct secasindex *);
400 static void key_delsah (struct secashead *);
401 static struct secasvar *key_newsav (struct mbuf *,
402 const struct sadb_msghdr *, struct secashead *, int *);
403 static void key_delsav (struct secasvar *);
404 static struct secashead *key_getsah (struct secasindex *);
405 static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
406 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
407 static int key_setsaval (struct secasvar *, struct mbuf *,
408 const struct sadb_msghdr *);
409 static int key_mature (struct secasvar *);
410 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
411 u_int8_t, u_int32_t, u_int32_t);
412 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
413 u_int32_t, pid_t, u_int16_t);
414 static struct mbuf *key_setsadbsa (struct secasvar *);
415 static struct mbuf *key_setsadbaddr (u_int16_t,
416 struct sockaddr *, u_int8_t, u_int16_t);
418 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, caddr_t,
421 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int32_t);
422 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
424 static void *key_newbuf (const void *, u_int);
426 static int key_ismyaddr6 (struct sockaddr_in6 *);
429 /* flags for key_cmpsaidx() */
430 #define CMP_HEAD 1 /* protocol, addresses. */
431 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
432 #define CMP_REQID 3 /* additionally HEAD, reaid. */
433 #define CMP_EXACTLY 4 /* all elements. */
434 static int key_cmpsaidx
435 (struct secasindex *, struct secasindex *, int);
437 static int key_cmpspidx_exactly
438 (struct secpolicyindex *, struct secpolicyindex *);
439 static int key_cmpspidx_withmask
440 (struct secpolicyindex *, struct secpolicyindex *);
441 static int key_sockaddrcmp (struct sockaddr *, struct sockaddr *, int);
442 static int key_bbcmp (caddr_t, caddr_t, u_int);
443 static void key_srandom (void);
444 static u_int16_t key_satype2proto (u_int8_t);
445 static u_int8_t key_proto2satype (u_int16_t);
447 static int key_getspi (struct socket *, struct mbuf *,
448 const struct sadb_msghdr *);
449 static u_int32_t key_do_getnewspi (struct sadb_spirange *,
450 struct secasindex *);
451 static int key_update (struct socket *, struct mbuf *,
452 const struct sadb_msghdr *);
453 #ifdef IPSEC_DOSEQCHECK
454 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
456 static int key_add (struct socket *, struct mbuf *,
457 const struct sadb_msghdr *);
458 static int key_setident (struct secashead *, struct mbuf *,
459 const struct sadb_msghdr *);
460 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
461 const struct sadb_msghdr *);
462 static int key_delete (struct socket *, struct mbuf *,
463 const struct sadb_msghdr *);
464 static int key_get (struct socket *, struct mbuf *,
465 const struct sadb_msghdr *);
467 static void key_getcomb_setlifetime (struct sadb_comb *);
469 static struct mbuf *key_getcomb_esp (void);
471 static struct mbuf *key_getcomb_ah (void);
472 static struct mbuf *key_getcomb_ipcomp (void);
473 static struct mbuf *key_getprop (const struct secasindex *);
475 static int key_acquire (struct secasindex *, struct secpolicy *);
476 #ifndef IPSEC_NONBLOCK_ACQUIRE
477 static struct secacq *key_newacq (struct secasindex *);
478 static struct secacq *key_getacq (struct secasindex *);
479 static struct secacq *key_getacqbyseq (u_int32_t);
481 static struct secspacq *key_newspacq (struct secpolicyindex *);
482 static struct secspacq *key_getspacq (struct secpolicyindex *);
483 static int key_acquire2 (struct socket *, struct mbuf *,
484 const struct sadb_msghdr *);
485 static int key_register (struct socket *, struct mbuf *,
486 const struct sadb_msghdr *);
487 static int key_expire (struct secasvar *);
488 static int key_flush (struct socket *, struct mbuf *,
489 const struct sadb_msghdr *);
490 static int key_dump (struct socket *, struct mbuf *,
491 const struct sadb_msghdr *);
492 static int key_promisc (struct socket *, struct mbuf *,
493 const struct sadb_msghdr *);
494 static int key_senderror (struct socket *, struct mbuf *, int);
495 static int key_validate_ext (const struct sadb_ext *, int);
496 static int key_align (struct mbuf *, struct sadb_msghdr *);
498 static const char *key_getfqdn (void);
499 static const char *key_getuserfqdn (void);
501 static void key_sa_chgstate (struct secasvar *, u_int8_t);
502 static struct mbuf *key_alloc_mbuf (int);
504 /* %%% IPsec policy management */
506 * allocating a SP for OUTBOUND or INBOUND packet.
507 * Must call key_freesp() later.
508 * OUT: NULL: not found
509 * others: found and return the pointer.
512 key_allocsp(struct secpolicyindex *spidx, u_int dir)
514 struct secpolicy *sp;
519 panic("key_allocsp: NULL pointer is passed.\n");
521 /* check direction */
523 case IPSEC_DIR_INBOUND:
524 case IPSEC_DIR_OUTBOUND:
527 panic("key_allocsp: Invalid direction is passed.\n");
531 lwkt_gettoken(&key_token);
532 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
533 kprintf("*** objects\n");
534 kdebug_secpolicyindex(spidx));
536 LIST_FOREACH(sp, &sptree[dir], chain) {
537 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
538 kprintf("*** in SPD\n");
539 kdebug_secpolicyindex(&sp->spidx));
541 if (sp->state == IPSEC_SPSTATE_DEAD)
543 if (key_cmpspidx_withmask(&sp->spidx, spidx))
547 lwkt_reltoken(&key_token);
552 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
554 /* found a SPD entry */
557 sp->lastused = tv.tv_sec;
558 lwkt_reltoken(&key_token);
559 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
560 kprintf("DP key_allocsp cause refcnt++:%d SP:%p\n",
567 * return a policy that matches this particular inbound packet.
571 key_gettunnel(struct sockaddr *osrc, struct sockaddr *odst,
572 struct sockaddr *isrc, struct sockaddr *idst)
574 struct secpolicy *sp;
575 const int dir = IPSEC_DIR_INBOUND;
577 struct ipsecrequest *r1, *r2, *p;
578 struct sockaddr *os, *od, *is, *id;
579 struct secpolicyindex spidx;
581 if (isrc->sa_family != idst->sa_family) {
582 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
583 isrc->sa_family, idst->sa_family));
587 lwkt_gettoken(&key_token);
588 LIST_FOREACH(sp, &sptree[dir], chain) {
589 if (sp->state == IPSEC_SPSTATE_DEAD)
593 for (p = sp->req; p; p = p->next) {
594 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
601 /* here we look at address matches only */
603 if (isrc->sa_len > sizeof(spidx.src) ||
604 idst->sa_len > sizeof(spidx.dst))
606 bcopy(isrc, &spidx.src, isrc->sa_len);
607 bcopy(idst, &spidx.dst, idst->sa_len);
608 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
611 is = (struct sockaddr *)&r1->saidx.src;
612 id = (struct sockaddr *)&r1->saidx.dst;
613 if (key_sockaddrcmp(is, isrc, 0) ||
614 key_sockaddrcmp(id, idst, 0))
618 os = (struct sockaddr *)&r2->saidx.src;
619 od = (struct sockaddr *)&r2->saidx.dst;
620 if (key_sockaddrcmp(os, osrc, 0) ||
621 key_sockaddrcmp(od, odst, 0))
627 lwkt_reltoken(&key_token);
633 sp->lastused = tv.tv_sec;
634 lwkt_reltoken(&key_token);
639 * allocating an SA entry for an *OUTBOUND* packet.
640 * checking each request entries in SP, and acquire an SA if need.
641 * OUT: 0: there are valid requests.
642 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
645 key_checkrequest(struct ipsecrequest *isr, struct secasindex *saidx)
651 if (isr == NULL || saidx == NULL)
652 panic("key_checkrequest: NULL pointer is passed.\n");
655 switch (saidx->mode) {
656 case IPSEC_MODE_TRANSPORT:
657 case IPSEC_MODE_TUNNEL:
661 panic("key_checkrequest: Invalid policy defined.\n");
664 lwkt_gettoken(&key_token);
666 /* get current level */
667 level = ipsec_get_reqlevel(isr);
671 * We do allocate new SA only if the state of SA in the holder is
672 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
674 if (isr->sav != NULL) {
675 if (isr->sav->sah == NULL)
676 panic("key_checkrequest: sah is null.\n");
677 if (isr->sav == (struct secasvar *)LIST_FIRST(
678 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
679 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
680 kprintf("DP checkrequest calls free SA:%p\n",
682 key_freesav(isr->sav);
688 * we free any SA stashed in the IPsec request because a different
689 * SA may be involved each time this request is checked, either
690 * because new SAs are being configured, or this request is
691 * associated with an unconnected datagram socket, or this request
692 * is associated with a system default policy.
694 * The operation may have negative impact to performance. We may
695 * want to check cached SA carefully, rather than picking new SA
698 if (isr->sav != NULL) {
699 key_freesav(isr->sav);
705 * new SA allocation if no SA found.
706 * key_allocsa_policy should allocate the oldest SA available.
707 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
709 if (isr->sav == NULL)
710 isr->sav = key_allocsa_policy(saidx);
712 /* When there is SA. */
713 if (isr->sav != NULL) {
714 lwkt_reltoken(&key_token);
719 if ((error = key_acquire(saidx, isr->sp)) != 0) {
720 /* XXX What should I do ? */
721 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
722 "from key_acquire.\n", error));
723 lwkt_reltoken(&key_token);
727 lwkt_reltoken(&key_token);
728 return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
732 * allocating a SA for policy entry from SAD.
733 * NOTE: searching SAD of aliving state.
734 * OUT: NULL: not found.
735 * others: found and return the pointer.
737 static struct secasvar *
738 key_allocsa_policy(struct secasindex *saidx)
740 struct secashead *sah;
741 struct secasvar *sav;
742 u_int stateidx, state;
743 const u_int *saorder_state_valid;
746 LIST_FOREACH(sah, &sahtree, chain) {
747 if (sah->state == SADB_SASTATE_DEAD)
749 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
758 * search a valid state list for outbound packet.
759 * This search order is important.
761 if (key_preferred_oldsa) {
762 saorder_state_valid = saorder_state_valid_prefer_old;
763 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
765 saorder_state_valid = saorder_state_valid_prefer_new;
766 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
769 for (stateidx = 0; stateidx < arraysize; stateidx++) {
771 state = saorder_state_valid[stateidx];
773 sav = key_do_allocsa_policy(sah, state);
782 * searching SAD with direction, protocol, mode and state.
783 * called by key_allocsa_policy().
786 * others : found, pointer to a SA.
788 static struct secasvar *
789 key_do_allocsa_policy(struct secashead *sah, u_int state)
791 struct secasvar *sav, *nextsav, *candidate, *d;
796 for (sav = LIST_FIRST(&sah->savtree[state]);
800 nextsav = LIST_NEXT(sav, chain);
803 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
806 if (candidate == NULL) {
811 /* Which SA is the better ? */
814 if (candidate->lft_c == NULL || sav->lft_c == NULL)
815 panic("key_do_allocsa_policy: "
816 "lifetime_current is NULL.\n");
818 /* What the best method is to compare ? */
819 if (key_preferred_oldsa) {
820 if (candidate->lft_c->sadb_lifetime_addtime >
821 sav->lft_c->sadb_lifetime_addtime) {
828 /* prefered new sa rather than old sa */
829 if (candidate->lft_c->sadb_lifetime_addtime <
830 sav->lft_c->sadb_lifetime_addtime) {
837 * prepared to delete the SA when there is more
838 * suitable candidate and the lifetime of the SA is not
841 if (d->lft_c->sadb_lifetime_addtime != 0) {
842 struct mbuf *m, *result;
844 key_sa_chgstate(d, SADB_SASTATE_DEAD);
846 m = key_setsadbmsg(SADB_DELETE, 0,
847 d->sah->saidx.proto, 0, 0, d->refcnt - 1);
852 /* set sadb_address for saidx's. */
853 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
854 (struct sockaddr *)&d->sah->saidx.src,
855 d->sah->saidx.src.ss_len << 3,
861 /* set sadb_address for saidx's. */
862 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
863 (struct sockaddr *)&d->sah->saidx.src,
864 d->sah->saidx.src.ss_len << 3,
870 /* create SA extension */
871 m = key_setsadbsa(d);
876 if (result->m_len < sizeof(struct sadb_msg)) {
877 result = m_pullup(result,
878 sizeof(struct sadb_msg));
883 result->m_pkthdr.len = 0;
884 for (m = result; m; m = m->m_next)
885 result->m_pkthdr.len += m->m_len;
886 mtod(result, struct sadb_msg *)->sadb_msg_len =
887 PFKEY_UNIT64(result->m_pkthdr.len);
889 if (key_sendup_mbuf(NULL, result,
890 KEY_SENDUP_REGISTERED))
899 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
900 kprintf("DP allocsa_policy cause "
901 "refcnt++:%d SA:%p\n",
902 candidate->refcnt, candidate));
908 * allocating a SA entry for a *INBOUND* packet.
909 * Must call key_freesav() later.
910 * OUT: positive: pointer to a sav.
911 * NULL: not found, or error occured.
913 * In the comparison, source address will be ignored for RFC2401 conformance.
914 * To quote, from section 4.1:
915 * A security association is uniquely identified by a triple consisting
916 * of a Security Parameter Index (SPI), an IP Destination Address, and a
917 * security protocol (AH or ESP) identifier.
918 * Note that, however, we do need to keep source address in IPsec SA.
919 * IKE specification and PF_KEY specification do assume that we
920 * keep source address in IPsec SA. We see a tricky situation here.
923 key_allocsa(u_int family, caddr_t src, caddr_t dst, u_int proto,
926 struct secashead *sah;
927 struct secasvar *sav;
928 u_int stateidx, state;
929 struct sockaddr_in sin;
930 struct sockaddr_in6 sin6;
931 const u_int *saorder_state_valid;
935 if (src == NULL || dst == NULL)
936 panic("key_allocsa: NULL pointer is passed.\n");
939 * when both systems employ similar strategy to use a SA.
940 * the search order is important even in the inbound case.
942 if (key_preferred_oldsa) {
943 saorder_state_valid = saorder_state_valid_prefer_old;
944 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
946 saorder_state_valid = saorder_state_valid_prefer_new;
947 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
952 * XXX: to be checked internal IP header somewhere. Also when
953 * IPsec tunnel packet is received. But ESP tunnel mode is
954 * encrypted so we can't check internal IP header.
956 lwkt_gettoken(&key_token);
957 LIST_FOREACH(sah, &sahtree, chain) {
959 * search a valid state list for inbound packet.
960 * the search order is not important.
962 for (stateidx = 0; stateidx < arraysize; stateidx++) {
963 state = saorder_state_valid[stateidx];
964 LIST_FOREACH(sav, &sah->savtree[state], chain) {
966 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
967 if (proto != sav->sah->saidx.proto)
971 if (family != sav->sah->saidx.src.ss_family ||
972 family != sav->sah->saidx.dst.ss_family)
975 #if 0 /* don't check src */
976 /* check src address */
979 bzero(&sin, sizeof(sin));
980 sin.sin_family = AF_INET;
981 sin.sin_len = sizeof(sin);
982 bcopy(src, &sin.sin_addr,
983 sizeof(sin.sin_addr));
984 if (key_sockaddrcmp((struct sockaddr*)&sin,
985 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
990 bzero(&sin6, sizeof(sin6));
991 sin6.sin6_family = AF_INET6;
992 sin6.sin6_len = sizeof(sin6);
993 bcopy(src, &sin6.sin6_addr,
994 sizeof(sin6.sin6_addr));
995 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
996 /* kame fake scopeid */
998 ntohs(sin6.sin6_addr.s6_addr16[1]);
999 sin6.sin6_addr.s6_addr16[1] = 0;
1001 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1002 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
1006 ipseclog((LOG_DEBUG, "key_allocsa: "
1007 "unknown address family=%d.\n",
1013 /* check dst address */
1016 bzero(&sin, sizeof(sin));
1017 sin.sin_family = AF_INET;
1018 sin.sin_len = sizeof(sin);
1019 bcopy(dst, &sin.sin_addr,
1020 sizeof(sin.sin_addr));
1021 if (key_sockaddrcmp((struct sockaddr*)&sin,
1022 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1027 bzero(&sin6, sizeof(sin6));
1028 sin6.sin6_family = AF_INET6;
1029 sin6.sin6_len = sizeof(sin6);
1030 bcopy(dst, &sin6.sin6_addr,
1031 sizeof(sin6.sin6_addr));
1032 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1033 /* kame fake scopeid */
1034 sin6.sin6_scope_id =
1035 ntohs(sin6.sin6_addr.s6_addr16[1]);
1036 sin6.sin6_addr.s6_addr16[1] = 0;
1038 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1039 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1043 ipseclog((LOG_DEBUG, "key_allocsa: "
1044 "unknown address family=%d.\n",
1055 lwkt_reltoken(&key_token);
1060 lwkt_reltoken(&key_token);
1061 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1062 kprintf("DP allocsa cause refcnt++:%d SA:%p\n",
1068 * Must be called after calling key_allocsp().
1069 * For both the packet without socket and key_freeso().
1072 key_freesp(struct secpolicy *sp)
1076 panic("key_freesp: NULL pointer is passed.\n");
1078 lwkt_gettoken(&key_token);
1080 if (sp->refcnt == 0)
1082 lwkt_reltoken(&key_token);
1086 * Must be called after calling key_allocsp().
1087 * For the packet with socket.
1090 key_freeso(struct socket *so)
1094 panic("key_freeso: NULL pointer is passed.\n");
1096 lwkt_gettoken(&key_token);
1097 switch (so->so_proto->pr_domain->dom_family) {
1101 struct inpcb *pcb = so->so_pcb;
1103 /* Does it have a PCB ? */
1106 key_freesp_so(&pcb->inp_sp->sp_in);
1107 key_freesp_so(&pcb->inp_sp->sp_out);
1114 #ifdef HAVE_NRL_INPCB
1115 struct inpcb *pcb = so->so_pcb;
1117 /* Does it have a PCB ? */
1120 key_freesp_so(&pcb->inp_sp->sp_in);
1121 key_freesp_so(&pcb->inp_sp->sp_out);
1123 struct in6pcb *pcb = so->so_pcb;
1125 /* Does it have a PCB ? */
1128 key_freesp_so(&pcb->in6p_sp->sp_in);
1129 key_freesp_so(&pcb->in6p_sp->sp_out);
1135 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1136 so->so_proto->pr_domain->dom_family));
1139 lwkt_reltoken(&key_token);
1143 key_freesp_so(struct secpolicy **sp)
1146 if (sp == NULL || *sp == NULL)
1147 panic("key_freesp_so: sp == NULL\n");
1149 switch ((*sp)->policy) {
1150 case IPSEC_POLICY_IPSEC:
1151 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1152 kprintf("DP freeso calls free SP:%p\n", *sp));
1156 case IPSEC_POLICY_ENTRUST:
1157 case IPSEC_POLICY_BYPASS:
1160 panic("key_freesp_so: Invalid policy found %d", (*sp)->policy);
1167 * Must be called after calling key_allocsa().
1168 * This function is called by key_freesp() to free some SA allocated
1172 key_freesav(struct secasvar *sav)
1176 panic("key_freesav: NULL pointer is passed.\n");
1178 lwkt_gettoken(&key_token);
1180 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1181 kprintf("DP freesav cause refcnt--:%d SA:%p SPI %u\n",
1182 sav->refcnt, sav, (u_int32_t)ntohl(sav->spi)));
1184 if (sav->refcnt == 0)
1187 lwkt_reltoken(&key_token);
1190 /* %%% SPD management */
1192 * free security policy entry.
1195 key_delsp(struct secpolicy *sp)
1199 panic("key_delsp: NULL pointer is passed.\n");
1201 sp->state = IPSEC_SPSTATE_DEAD;
1204 return; /* can't free */
1206 /* remove from SP index */
1207 if (__LIST_CHAINED(sp))
1208 LIST_REMOVE(sp, chain);
1211 struct ipsecrequest *isr = sp->req, *nextisr;
1213 while (isr != NULL) {
1214 if (isr->sav != NULL) {
1215 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1216 kprintf("DP delsp calls free SA:%p\n",
1218 key_freesav(isr->sav);
1222 nextisr = isr->next;
1227 keydb_delsecpolicy(sp);
1232 * OUT: NULL : not found
1233 * others : found, pointer to a SP.
1235 static struct secpolicy *
1236 key_getsp(struct secpolicyindex *spidx)
1238 struct secpolicy *sp;
1242 panic("key_getsp: NULL pointer is passed.\n");
1244 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1245 if (sp->state == IPSEC_SPSTATE_DEAD)
1247 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1258 * OUT: NULL : not found
1259 * others : found, pointer to a SP.
1261 static struct secpolicy *
1262 key_getspbyid(u_int32_t id)
1264 struct secpolicy *sp;
1266 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1267 if (sp->state == IPSEC_SPSTATE_DEAD)
1275 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1276 if (sp->state == IPSEC_SPSTATE_DEAD)
1290 struct secpolicy *newsp = NULL;
1292 lwkt_gettoken(&key_token);
1293 newsp = keydb_newsecpolicy();
1298 lwkt_reltoken(&key_token);
1304 * create secpolicy structure from sadb_x_policy structure.
1305 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1306 * so must be set properly later.
1309 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1311 struct secpolicy *newsp;
1315 panic("key_msg2sp: NULL pointer was passed.\n");
1316 if (len < sizeof(*xpl0))
1317 panic("key_msg2sp: invalid length.\n");
1318 if (len != PFKEY_EXTLEN(xpl0)) {
1319 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1324 lwkt_gettoken(&key_token);
1325 if ((newsp = key_newsp()) == NULL) {
1326 lwkt_reltoken(&key_token);
1331 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1332 newsp->policy = xpl0->sadb_x_policy_type;
1335 switch (xpl0->sadb_x_policy_type) {
1336 case IPSEC_POLICY_DISCARD:
1337 case IPSEC_POLICY_NONE:
1338 case IPSEC_POLICY_ENTRUST:
1339 case IPSEC_POLICY_BYPASS:
1343 case IPSEC_POLICY_IPSEC:
1346 struct sadb_x_ipsecrequest *xisr;
1347 struct ipsecrequest **p_isr = &newsp->req;
1349 /* validity check */
1350 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1351 ipseclog((LOG_DEBUG,
1352 "key_msg2sp: Invalid msg length.\n"));
1354 lwkt_reltoken(&key_token);
1359 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1360 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1365 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1366 ipseclog((LOG_DEBUG, "key_msg2sp: "
1367 "invalid ipsecrequest length.\n"));
1369 lwkt_reltoken(&key_token);
1374 /* allocate request buffer */
1375 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1376 if ((*p_isr) == NULL) {
1377 ipseclog((LOG_DEBUG,
1378 "key_msg2sp: No more memory.\n"));
1380 lwkt_reltoken(&key_token);
1384 bzero(*p_isr, sizeof(**p_isr));
1387 (*p_isr)->next = NULL;
1389 switch (xisr->sadb_x_ipsecrequest_proto) {
1392 case IPPROTO_IPCOMP:
1395 ipseclog((LOG_DEBUG,
1396 "key_msg2sp: invalid proto type=%u\n",
1397 xisr->sadb_x_ipsecrequest_proto));
1399 lwkt_reltoken(&key_token);
1400 *error = EPROTONOSUPPORT;
1403 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1405 switch (xisr->sadb_x_ipsecrequest_mode) {
1406 case IPSEC_MODE_TRANSPORT:
1407 case IPSEC_MODE_TUNNEL:
1409 case IPSEC_MODE_ANY:
1411 ipseclog((LOG_DEBUG,
1412 "key_msg2sp: invalid mode=%u\n",
1413 xisr->sadb_x_ipsecrequest_mode));
1415 lwkt_reltoken(&key_token);
1419 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1421 switch (xisr->sadb_x_ipsecrequest_level) {
1422 case IPSEC_LEVEL_DEFAULT:
1423 case IPSEC_LEVEL_USE:
1424 case IPSEC_LEVEL_REQUIRE:
1426 case IPSEC_LEVEL_UNIQUE:
1427 /* validity check */
1429 * If range violation of reqid, kernel will
1430 * update it, don't refuse it.
1432 if (xisr->sadb_x_ipsecrequest_reqid
1433 > IPSEC_MANUAL_REQID_MAX) {
1434 ipseclog((LOG_DEBUG,
1435 "key_msg2sp: reqid=%d range "
1436 "violation, updated by kernel.\n",
1437 xisr->sadb_x_ipsecrequest_reqid));
1438 xisr->sadb_x_ipsecrequest_reqid = 0;
1441 /* allocate new reqid id if reqid is zero. */
1442 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1444 if ((reqid = key_newreqid()) == 0) {
1446 lwkt_reltoken(&key_token);
1450 (*p_isr)->saidx.reqid = reqid;
1451 xisr->sadb_x_ipsecrequest_reqid = reqid;
1453 /* set it for manual keying. */
1454 (*p_isr)->saidx.reqid =
1455 xisr->sadb_x_ipsecrequest_reqid;
1460 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1461 xisr->sadb_x_ipsecrequest_level));
1463 lwkt_reltoken(&key_token);
1467 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1469 /* set IP addresses if there */
1470 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1471 struct sockaddr *paddr;
1473 paddr = (struct sockaddr *)(xisr + 1);
1475 /* validity check */
1477 > sizeof((*p_isr)->saidx.src)) {
1478 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1479 "address length.\n"));
1481 lwkt_reltoken(&key_token);
1485 bcopy(paddr, &(*p_isr)->saidx.src,
1488 paddr = (struct sockaddr *)((caddr_t)paddr
1491 /* validity check */
1493 > sizeof((*p_isr)->saidx.dst)) {
1494 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1495 "address length.\n"));
1497 lwkt_reltoken(&key_token);
1501 bcopy(paddr, &(*p_isr)->saidx.dst,
1505 (*p_isr)->sav = NULL;
1506 (*p_isr)->sp = newsp;
1508 /* initialization for the next. */
1509 p_isr = &(*p_isr)->next;
1510 tlen -= xisr->sadb_x_ipsecrequest_len;
1512 /* validity check */
1514 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1516 lwkt_reltoken(&key_token);
1521 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1522 + xisr->sadb_x_ipsecrequest_len);
1527 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1529 lwkt_reltoken(&key_token);
1533 lwkt_reltoken(&key_token);
1541 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1543 auto_reqid = (auto_reqid == ~0
1544 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1546 /* XXX should be unique check */
1552 * copy secpolicy struct to sadb_x_policy structure indicated.
1555 key_sp2msg(struct secpolicy *sp)
1557 struct sadb_x_policy *xpl;
1564 panic("key_sp2msg: NULL pointer was passed.\n");
1566 lwkt_gettoken(&key_token);
1567 tlen = key_getspreqmsglen(sp);
1569 m = key_alloc_mbuf(tlen);
1570 if (!m || m->m_next) { /*XXX*/
1573 lwkt_reltoken(&key_token);
1579 xpl = mtod(m, struct sadb_x_policy *);
1582 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1583 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1584 xpl->sadb_x_policy_type = sp->policy;
1585 xpl->sadb_x_policy_dir = sp->spidx.dir;
1586 xpl->sadb_x_policy_id = sp->id;
1587 p = (caddr_t)xpl + sizeof(*xpl);
1589 /* if is the policy for ipsec ? */
1590 if (sp->policy == IPSEC_POLICY_IPSEC) {
1591 struct sadb_x_ipsecrequest *xisr;
1592 struct ipsecrequest *isr;
1594 for (isr = sp->req; isr != NULL; isr = isr->next) {
1596 xisr = (struct sadb_x_ipsecrequest *)p;
1598 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1599 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1600 xisr->sadb_x_ipsecrequest_level = isr->level;
1601 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1604 bcopy(&isr->saidx.src, p, isr->saidx.src.ss_len);
1605 p += isr->saidx.src.ss_len;
1606 bcopy(&isr->saidx.dst, p, isr->saidx.dst.ss_len);
1607 p += isr->saidx.src.ss_len;
1609 xisr->sadb_x_ipsecrequest_len =
1610 PFKEY_ALIGN8(sizeof(*xisr)
1611 + isr->saidx.src.ss_len
1612 + isr->saidx.dst.ss_len);
1615 lwkt_reltoken(&key_token);
1619 /* m will not be freed nor modified */
1620 static struct mbuf *
1621 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1622 int ndeep, int nitem, ...)
1627 struct mbuf *result = NULL, *n;
1630 if (m == NULL || mhp == NULL)
1631 panic("null pointer passed to key_gather");
1633 __va_start(ap, nitem);
1634 for (i = 0; i < nitem; i++) {
1635 idx = __va_arg(ap, int);
1636 if (idx < 0 || idx > SADB_EXT_MAX)
1638 /* don't attempt to pull empty extension */
1639 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1641 if (idx != SADB_EXT_RESERVED &&
1642 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1645 if (idx == SADB_EXT_RESERVED) {
1646 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1649 panic("assumption failed");
1651 MGETHDR(n, MB_DONTWAIT, MT_DATA);
1656 m_copydata(m, 0, sizeof(struct sadb_msg),
1658 } else if (i < ndeep) {
1659 len = mhp->extlen[idx];
1660 n = key_alloc_mbuf(len);
1661 if (!n || n->m_next) { /*XXX*/
1666 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1669 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1682 if ((result->m_flags & M_PKTHDR) != 0) {
1683 result->m_pkthdr.len = 0;
1684 for (n = result; n; n = n->m_next)
1685 result->m_pkthdr.len += n->m_len;
1696 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1697 * add a entry to SP database, when received
1698 * <base, address(SD), (lifetime(H),) policy>
1700 * Adding to SP database,
1702 * <base, address(SD), (lifetime(H),) policy>
1703 * to the socket which was send.
1705 * SPDADD set a unique policy entry.
1706 * SPDSETIDX like SPDADD without a part of policy requests.
1707 * SPDUPDATE replace a unique policy entry.
1709 * m will always be freed.
1712 key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
1714 struct sadb_address *src0, *dst0;
1715 struct sadb_x_policy *xpl0, *xpl;
1716 struct sadb_lifetime *lft = NULL;
1717 struct secpolicyindex spidx;
1718 struct secpolicy *newsp;
1723 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1724 panic("key_spdadd: NULL pointer is passed.\n");
1726 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1727 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1728 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1729 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1730 return key_senderror(so, m, EINVAL);
1732 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1733 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1734 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1735 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1736 return key_senderror(so, m, EINVAL);
1738 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1739 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1740 < sizeof(struct sadb_lifetime)) {
1741 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1742 return key_senderror(so, m, EINVAL);
1744 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1747 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1748 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1749 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1752 /* XXX boundary check against sa_len */
1753 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1756 src0->sadb_address_prefixlen,
1757 dst0->sadb_address_prefixlen,
1758 src0->sadb_address_proto,
1761 /* checking the direciton. */
1762 switch (xpl0->sadb_x_policy_dir) {
1763 case IPSEC_DIR_INBOUND:
1764 case IPSEC_DIR_OUTBOUND:
1767 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1768 mhp->msg->sadb_msg_errno = EINVAL;
1773 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1774 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1775 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1776 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1777 return key_senderror(so, m, EINVAL);
1780 /* policy requests are mandatory when action is ipsec. */
1781 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1782 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1783 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1784 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1785 return key_senderror(so, m, EINVAL);
1789 * checking there is SP already or not.
1790 * SPDUPDATE doesn't depend on whether there is a SP or not.
1791 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1794 newsp = key_getsp(&spidx);
1795 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1797 newsp->state = IPSEC_SPSTATE_DEAD;
1801 if (newsp != NULL) {
1803 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1804 return key_senderror(so, m, EEXIST);
1808 /* allocation new SP entry */
1809 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1810 return key_senderror(so, m, error);
1813 if ((newsp->id = key_getnewspid()) == 0) {
1814 keydb_delsecpolicy(newsp);
1815 return key_senderror(so, m, ENOBUFS);
1818 /* XXX boundary check against sa_len */
1819 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1822 src0->sadb_address_prefixlen,
1823 dst0->sadb_address_prefixlen,
1824 src0->sadb_address_proto,
1827 /* sanity check on addr pair */
1828 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1829 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1830 keydb_delsecpolicy(newsp);
1831 return key_senderror(so, m, EINVAL);
1833 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1834 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1835 keydb_delsecpolicy(newsp);
1836 return key_senderror(so, m, EINVAL);
1839 if (newsp->req && newsp->req->saidx.src.ss_family) {
1840 struct sockaddr *sa;
1841 sa = (struct sockaddr *)(src0 + 1);
1842 if (sa->sa_family != newsp->req->saidx.src.ss_family) {
1843 keydb_delsecpolicy(newsp);
1844 return key_senderror(so, m, EINVAL);
1847 if (newsp->req && newsp->req->saidx.dst.ss_family) {
1848 struct sockaddr *sa;
1849 sa = (struct sockaddr *)(dst0 + 1);
1850 if (sa->sa_family != newsp->req->saidx.dst.ss_family) {
1851 keydb_delsecpolicy(newsp);
1852 return key_senderror(so, m, EINVAL);
1858 newsp->created = tv.tv_sec;
1859 newsp->lastused = tv.tv_sec;
1860 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1861 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1863 newsp->refcnt = 1; /* do not reclaim until I say I do */
1864 newsp->state = IPSEC_SPSTATE_ALIVE;
1865 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1867 /* delete the entry in spacqtree */
1868 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1869 struct secspacq *spacq;
1870 if ((spacq = key_getspacq(&spidx)) != NULL) {
1871 /* reset counter in order to deletion by timehandler. */
1873 spacq->created = tv.tv_sec;
1879 struct mbuf *n, *mpolicy;
1880 struct sadb_msg *newmsg;
1883 /* create new sadb_msg to reply. */
1885 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1886 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1887 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1889 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1891 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1894 return key_senderror(so, m, ENOBUFS);
1896 if (n->m_len < sizeof(*newmsg)) {
1897 n = m_pullup(n, sizeof(*newmsg));
1899 return key_senderror(so, m, ENOBUFS);
1901 newmsg = mtod(n, struct sadb_msg *);
1902 newmsg->sadb_msg_errno = 0;
1903 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1906 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1907 sizeof(*xpl), &off);
1908 if (mpolicy == NULL) {
1909 /* n is already freed */
1910 return key_senderror(so, m, ENOBUFS);
1912 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1913 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1915 return key_senderror(so, m, EINVAL);
1917 xpl->sadb_x_policy_id = newsp->id;
1920 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1925 * get new policy id.
1931 key_getnewspid(void)
1933 u_int32_t newid = 0;
1934 int count = key_spi_trycnt; /* XXX */
1935 struct secpolicy *sp;
1937 /* when requesting to allocate spi ranged */
1939 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1941 if ((sp = key_getspbyid(newid)) == NULL)
1947 if (count == 0 || newid == 0) {
1948 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1956 * SADB_SPDDELETE processing
1958 * <base, address(SD), policy(*)>
1959 * from the user(?), and set SADB_SASTATE_DEAD,
1961 * <base, address(SD), policy(*)>
1963 * policy(*) including direction of policy.
1965 * m will always be freed.
1968 key_spddelete(struct socket *so, struct mbuf *m,
1969 const struct sadb_msghdr *mhp)
1971 struct sadb_address *src0, *dst0;
1972 struct sadb_x_policy *xpl0;
1973 struct secpolicyindex spidx;
1974 struct secpolicy *sp;
1977 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1978 panic("key_spddelete: NULL pointer is passed.\n");
1980 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1981 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1982 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1983 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1984 return key_senderror(so, m, EINVAL);
1986 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1987 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1988 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1989 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1990 return key_senderror(so, m, EINVAL);
1993 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1994 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1995 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1998 /* XXX boundary check against sa_len */
1999 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2002 src0->sadb_address_prefixlen,
2003 dst0->sadb_address_prefixlen,
2004 src0->sadb_address_proto,
2007 /* checking the direciton. */
2008 switch (xpl0->sadb_x_policy_dir) {
2009 case IPSEC_DIR_INBOUND:
2010 case IPSEC_DIR_OUTBOUND:
2013 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
2014 return key_senderror(so, m, EINVAL);
2017 /* Is there SP in SPD ? */
2018 if ((sp = key_getsp(&spidx)) == NULL) {
2019 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2020 return key_senderror(so, m, EINVAL);
2023 /* save policy id to buffer to be returned. */
2024 xpl0->sadb_x_policy_id = sp->id;
2026 sp->state = IPSEC_SPSTATE_DEAD;
2031 struct sadb_msg *newmsg;
2033 /* create new sadb_msg to reply. */
2034 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2035 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2037 return key_senderror(so, m, ENOBUFS);
2039 newmsg = mtod(n, struct sadb_msg *);
2040 newmsg->sadb_msg_errno = 0;
2041 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2044 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2049 * SADB_SPDDELETE2 processing
2052 * from the user(?), and set SADB_SASTATE_DEAD,
2056 * policy(*) including direction of policy.
2058 * m will always be freed.
2061 key_spddelete2(struct socket *so, struct mbuf *m,
2062 const struct sadb_msghdr *mhp)
2065 struct secpolicy *sp;
2068 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2069 panic("key_spddelete2: NULL pointer is passed.\n");
2071 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2072 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2073 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2074 key_senderror(so, m, EINVAL);
2078 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2080 /* Is there SP in SPD ? */
2081 if ((sp = key_getspbyid(id)) == NULL) {
2082 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2083 key_senderror(so, m, EINVAL);
2086 sp->state = IPSEC_SPSTATE_DEAD;
2090 struct mbuf *n, *nn;
2091 struct sadb_msg *newmsg;
2094 /* create new sadb_msg to reply. */
2095 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2098 return key_senderror(so, m, ENOBUFS);
2099 MGETHDR(n, MB_DONTWAIT, MT_DATA);
2100 if (n && len > MHLEN) {
2101 MCLGET(n, MB_DONTWAIT);
2102 if ((n->m_flags & M_EXT) == 0) {
2108 return key_senderror(so, m, ENOBUFS);
2114 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2115 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2119 panic("length inconsistency in key_spddelete2");
2122 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2123 mhp->extlen[SADB_X_EXT_POLICY], MB_DONTWAIT);
2126 return key_senderror(so, m, ENOBUFS);
2129 n->m_pkthdr.len = 0;
2130 for (nn = n; nn; nn = nn->m_next)
2131 n->m_pkthdr.len += nn->m_len;
2133 newmsg = mtod(n, struct sadb_msg *);
2134 newmsg->sadb_msg_errno = 0;
2135 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2138 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2143 * SADB_X_GET processing
2148 * <base, address(SD), policy>
2150 * policy(*) including direction of policy.
2152 * m will always be freed.
2155 key_spdget(struct socket *so, struct mbuf *m,
2156 const struct sadb_msghdr *mhp)
2159 struct secpolicy *sp;
2163 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2164 panic("key_spdget: NULL pointer is passed.\n");
2166 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2167 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2168 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2169 return key_senderror(so, m, EINVAL);
2172 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2174 /* Is there SP in SPD ? */
2175 if ((sp = key_getspbyid(id)) == NULL) {
2176 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2177 return key_senderror(so, m, ENOENT);
2180 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2183 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2185 return key_senderror(so, m, ENOBUFS);
2189 * SADB_X_SPDACQUIRE processing.
2190 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2193 * to KMD, and expect to receive
2194 * <base> with SADB_X_SPDACQUIRE if error occured,
2197 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2198 * policy(*) is without policy requests.
2201 * others: error number
2204 key_spdacquire(struct secpolicy *sp)
2206 struct mbuf *result = NULL, *m;
2207 struct secspacq *newspacq;
2212 panic("key_spdacquire: NULL pointer is passed.\n");
2213 if (sp->req != NULL)
2214 panic("key_spdacquire: called but there is request.\n");
2215 if (sp->policy != IPSEC_POLICY_IPSEC)
2216 panic("key_spdacquire: policy mismatched. IPsec is expected.\n");
2218 lwkt_gettoken(&key_token);
2219 /* get a entry to check whether sent message or not. */
2220 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2221 if (key_blockacq_count < newspacq->count) {
2222 /* reset counter and do send message. */
2223 newspacq->count = 0;
2225 /* increment counter and do nothing. */
2227 lwkt_reltoken(&key_token);
2231 /* make new entry for blocking to send SADB_ACQUIRE. */
2232 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) {
2233 lwkt_reltoken(&key_token);
2237 /* add to acqtree */
2238 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2241 /* create new sadb_msg to reply. */
2242 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2249 result->m_pkthdr.len = 0;
2250 for (m = result; m; m = m->m_next)
2251 result->m_pkthdr.len += m->m_len;
2253 mtod(result, struct sadb_msg *)->sadb_msg_len =
2254 PFKEY_UNIT64(result->m_pkthdr.len);
2256 error = key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2257 lwkt_reltoken(&key_token);
2261 lwkt_reltoken(&key_token);
2268 * SADB_SPDFLUSH processing
2271 * from the user, and free all entries in secpctree.
2275 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2277 * m will always be freed.
2280 key_spdflush(struct socket *so, struct mbuf *m,
2281 const struct sadb_msghdr *mhp)
2283 struct sadb_msg *newmsg;
2284 struct secpolicy *sp;
2288 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2289 panic("key_spdflush: NULL pointer is passed.\n");
2291 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2292 return key_senderror(so, m, EINVAL);
2294 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2295 LIST_FOREACH(sp, &sptree[dir], chain) {
2296 sp->state = IPSEC_SPSTATE_DEAD;
2300 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2301 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2302 return key_senderror(so, m, ENOBUFS);
2308 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2309 newmsg = mtod(m, struct sadb_msg *);
2310 newmsg->sadb_msg_errno = 0;
2311 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2313 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2317 * SADB_SPDDUMP processing
2320 * from the user, and dump all SP leaves
2325 * m will always be freed.
2328 key_spddump(struct socket *so, struct mbuf *m,
2329 const struct sadb_msghdr *mhp)
2331 struct secpolicy *sp;
2337 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2338 panic("key_spddump: NULL pointer is passed.\n");
2340 /* search SPD entry and get buffer size. */
2342 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2343 LIST_FOREACH(sp, &sptree[dir], chain) {
2349 return key_senderror(so, m, ENOENT);
2351 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2352 LIST_FOREACH(sp, &sptree[dir], chain) {
2354 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2355 mhp->msg->sadb_msg_pid);
2358 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2366 static struct mbuf *
2367 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2370 struct mbuf *result = NULL, *m;
2372 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2377 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2378 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
2379 sp->spidx.ul_proto);
2384 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2385 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
2386 sp->spidx.ul_proto);
2396 if ((result->m_flags & M_PKTHDR) == 0)
2399 if (result->m_len < sizeof(struct sadb_msg)) {
2400 result = m_pullup(result, sizeof(struct sadb_msg));
2405 result->m_pkthdr.len = 0;
2406 for (m = result; m; m = m->m_next)
2407 result->m_pkthdr.len += m->m_len;
2409 mtod(result, struct sadb_msg *)->sadb_msg_len =
2410 PFKEY_UNIT64(result->m_pkthdr.len);
2420 * get PFKEY message length for security policy and request.
2423 key_getspreqmsglen(struct secpolicy *sp)
2427 tlen = sizeof(struct sadb_x_policy);
2429 /* if is the policy for ipsec ? */
2430 if (sp->policy != IPSEC_POLICY_IPSEC)
2433 /* get length of ipsec requests */
2435 struct ipsecrequest *isr;
2438 for (isr = sp->req; isr != NULL; isr = isr->next) {
2439 len = sizeof(struct sadb_x_ipsecrequest)
2440 + isr->saidx.src.ss_len
2441 + isr->saidx.dst.ss_len;
2443 tlen += PFKEY_ALIGN8(len);
2451 * SADB_SPDEXPIRE processing
2453 * <base, address(SD), lifetime(CH), policy>
2457 * others : error number
2460 key_spdexpire(struct secpolicy *sp)
2462 struct mbuf *result = NULL, *m;
2465 struct sadb_lifetime *lt;
2467 /* XXX: Why do we lock ? */
2471 panic("key_spdexpire: NULL pointer is passed.\n");
2473 /* set msg header */
2474 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2481 /* create lifetime extension (current and hard) */
2482 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2483 m = key_alloc_mbuf(len);
2484 if (!m || m->m_next) { /*XXX*/
2490 bzero(mtod(m, caddr_t), len);
2491 lt = mtod(m, struct sadb_lifetime *);
2492 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2493 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2494 lt->sadb_lifetime_allocations = 0;
2495 lt->sadb_lifetime_bytes = 0;
2496 lt->sadb_lifetime_addtime = sp->created;
2497 lt->sadb_lifetime_usetime = sp->lastused;
2498 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2499 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2500 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2501 lt->sadb_lifetime_allocations = 0;
2502 lt->sadb_lifetime_bytes = 0;
2503 lt->sadb_lifetime_addtime = sp->lifetime;
2504 lt->sadb_lifetime_usetime = sp->validtime;
2507 /* set sadb_address for source */
2508 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2509 (struct sockaddr *)&sp->spidx.src,
2510 sp->spidx.prefs, sp->spidx.ul_proto);
2517 /* set sadb_address for destination */
2518 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2519 (struct sockaddr *)&sp->spidx.dst,
2520 sp->spidx.prefd, sp->spidx.ul_proto);
2535 if ((result->m_flags & M_PKTHDR) == 0) {
2540 if (result->m_len < sizeof(struct sadb_msg)) {
2541 result = m_pullup(result, sizeof(struct sadb_msg));
2542 if (result == NULL) {
2548 result->m_pkthdr.len = 0;
2549 for (m = result; m; m = m->m_next)
2550 result->m_pkthdr.len += m->m_len;
2552 mtod(result, struct sadb_msg *)->sadb_msg_len =
2553 PFKEY_UNIT64(result->m_pkthdr.len);
2555 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2563 /* %%% SAD management */
2565 * allocating a memory for new SA head, and copy from the values of mhp.
2566 * OUT: NULL : failure due to the lack of memory.
2567 * others : pointer to new SA head.
2569 static struct secashead *
2570 key_newsah(struct secasindex *saidx)
2572 struct secashead *newsah;
2576 panic("key_newsaidx: NULL pointer is passed.\n");
2578 newsah = keydb_newsecashead();
2582 bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
2584 /* add to saidxtree */
2585 newsah->state = SADB_SASTATE_MATURE;
2586 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2592 * delete SA index and all SA registerd.
2595 key_delsah(struct secashead *sah)
2597 struct secasvar *sav, *nextsav;
2598 u_int stateidx, state;
2603 panic("key_delsah: NULL pointer is passed.\n");
2605 /* searching all SA registerd in the secindex. */
2607 stateidx < _ARRAYLEN(saorder_state_any);
2610 state = saorder_state_any[stateidx];
2611 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2615 nextsav = LIST_NEXT(sav, chain);
2617 if (sav->refcnt > 0) {
2618 /* give up to delete this sa */
2624 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2628 /* remove back pointer */
2634 /* don't delete sah only if there are savs. */
2638 if (sah->sa_route.ro_rt) {
2639 RTFREE(sah->sa_route.ro_rt);
2640 sah->sa_route.ro_rt = NULL;
2643 /* remove from tree of SA index */
2644 if (__LIST_CHAINED(sah))
2645 LIST_REMOVE(sah, chain);
2653 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2654 * and copy the values of mhp into new buffer.
2655 * When SAD message type is GETSPI:
2656 * to set sequence number from acq_seq++,
2657 * to set zero to SPI.
2658 * not to call key_setsava().
2660 * others : pointer to new secasvar.
2662 * does not modify mbuf. does not free mbuf on error.
2664 static struct secasvar *
2665 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
2666 struct secashead *sah, int *errp)
2668 struct secasvar *newsav;
2669 const struct sadb_sa *xsa;
2672 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2673 panic("key_newsa: NULL pointer is passed.\n");
2675 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2676 if (newsav == NULL) {
2677 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2681 bzero((caddr_t)newsav, sizeof(struct secasvar));
2683 switch (mhp->msg->sadb_msg_type) {
2687 #ifdef IPSEC_DOSEQCHECK
2688 /* sync sequence number */
2689 if (mhp->msg->sadb_msg_seq == 0)
2691 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2694 newsav->seq = mhp->msg->sadb_msg_seq;
2699 if (mhp->ext[SADB_EXT_SA] == NULL) {
2701 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2705 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2706 newsav->spi = xsa->sadb_sa_spi;
2707 newsav->seq = mhp->msg->sadb_msg_seq;
2715 /* copy sav values */
2716 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2717 *errp = key_setsaval(newsav, m, mhp);
2728 newsav->created = tv.tv_sec;
2731 newsav->pid = mhp->msg->sadb_msg_pid;
2736 newsav->state = SADB_SASTATE_LARVAL;
2737 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2744 * free() SA variable entry.
2747 key_delsav(struct secasvar *sav)
2751 panic("key_delsav: NULL pointer is passed.\n");
2753 if (sav->refcnt > 0)
2754 return; /* can't free */
2756 /* remove from SA header */
2757 if (__LIST_CHAINED(sav))
2758 LIST_REMOVE(sav, chain);
2760 if (sav->key_auth != NULL) {
2761 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2762 KFREE(sav->key_auth);
2763 sav->key_auth = NULL;
2765 if (sav->key_enc != NULL) {
2766 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2767 KFREE(sav->key_enc);
2768 sav->key_enc = NULL;
2771 bzero(sav->sched, sav->schedlen);
2775 if (sav->replay != NULL) {
2776 keydb_delsecreplay(sav->replay);
2779 if (sav->lft_c != NULL) {
2783 if (sav->lft_h != NULL) {
2787 if (sav->lft_s != NULL) {
2791 if (sav->iv != NULL) {
2805 * others : found, pointer to a SA.
2807 static struct secashead *
2808 key_getsah(struct secasindex *saidx)
2810 struct secashead *sah;
2812 LIST_FOREACH(sah, &sahtree, chain) {
2813 if (sah->state == SADB_SASTATE_DEAD)
2815 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2823 * check not to be duplicated SPI.
2824 * NOTE: this function is too slow due to searching all SAD.
2827 * others : found, pointer to a SA.
2829 static struct secasvar *
2830 key_checkspidup(struct secasindex *saidx, u_int32_t spi)
2832 struct secashead *sah;
2833 struct secasvar *sav;
2835 /* check address family */
2836 if (saidx->src.ss_family != saidx->dst.ss_family) {
2837 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2842 LIST_FOREACH(sah, &sahtree, chain) {
2843 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2845 sav = key_getsavbyspi(sah, spi);
2854 * search SAD litmited alive SA, protocol, SPI.
2857 * others : found, pointer to a SA.
2859 static struct secasvar *
2860 key_getsavbyspi(struct secashead *sah, u_int32_t spi)
2862 struct secasvar *sav;
2863 u_int stateidx, state;
2865 /* search all status */
2867 stateidx < _ARRAYLEN(saorder_state_alive);
2870 state = saorder_state_alive[stateidx];
2871 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2874 if (sav->state != state) {
2875 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2876 "invalid sav->state (queue: %d SA: %d)\n",
2877 state, sav->state));
2881 if (sav->spi == spi)
2890 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2891 * You must update these if need.
2895 * does not modify mbuf. does not free mbuf on error.
2898 key_setsaval(struct secasvar *sav, struct mbuf *m,
2899 const struct sadb_msghdr *mhp)
2902 const struct esp_algorithm *algo;
2908 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2909 panic("key_setsaval: NULL pointer is passed.\n");
2911 /* initialization */
2913 sav->key_auth = NULL;
2914 sav->key_enc = NULL;
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 = keydb_newsecreplay(sa0->sadb_sa_replay);
2939 if (sav->replay == NULL) {
2940 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2947 /* Authentication keys */
2948 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2949 const struct sadb_key *key0;
2952 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2953 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2956 if (len < sizeof(*key0)) {
2960 switch (mhp->msg->sadb_msg_satype) {
2961 case SADB_SATYPE_AH:
2962 case SADB_SATYPE_ESP:
2963 case SADB_X_SATYPE_TCPSIGNATURE:
2964 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2965 sav->alg_auth != SADB_X_AALG_NULL)
2968 case SADB_X_SATYPE_IPCOMP:
2974 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2978 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2979 if (sav->key_auth == NULL) {
2980 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2986 /* Encryption key */
2987 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2988 const struct sadb_key *key0;
2991 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2992 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2995 if (len < sizeof(*key0)) {
2999 switch (mhp->msg->sadb_msg_satype) {
3000 case SADB_SATYPE_ESP:
3001 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3002 sav->alg_enc != SADB_EALG_NULL) {
3006 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
3007 if (sav->key_enc == NULL) {
3008 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3013 case SADB_X_SATYPE_IPCOMP:
3014 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3016 sav->key_enc = NULL; /*just in case*/
3018 case SADB_SATYPE_AH:
3019 case SADB_X_SATYPE_TCPSIGNATURE:
3025 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3033 switch (mhp->msg->sadb_msg_satype) {
3034 case SADB_SATYPE_ESP:
3036 algo = esp_algorithm_lookup(sav->alg_enc);
3037 if (algo && algo->ivlen)
3038 sav->ivlen = (*algo->ivlen)(algo, sav);
3039 if (sav->ivlen == 0)
3041 KMALLOC(sav->iv, caddr_t, sav->ivlen);
3043 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3049 key_randomfill(sav->iv, sav->ivlen);
3052 case SADB_SATYPE_AH:
3053 case SADB_X_SATYPE_IPCOMP:
3054 case SADB_X_SATYPE_TCPSIGNATURE:
3057 ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n"));
3064 sav->created = tv.tv_sec;
3066 /* make lifetime for CURRENT */
3067 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3068 sizeof(struct sadb_lifetime));
3069 if (sav->lft_c == NULL) {
3070 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3077 sav->lft_c->sadb_lifetime_len =
3078 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3079 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3080 sav->lft_c->sadb_lifetime_allocations = 0;
3081 sav->lft_c->sadb_lifetime_bytes = 0;
3082 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
3083 sav->lft_c->sadb_lifetime_usetime = 0;
3085 /* lifetimes for HARD and SOFT */
3087 const struct sadb_lifetime *lft0;
3089 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3091 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3095 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3097 if (sav->lft_h == NULL) {
3098 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3102 /* to be initialize ? */
3105 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3107 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3111 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3113 if (sav->lft_s == NULL) {
3114 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3118 /* to be initialize ? */
3125 /* initialization */
3126 if (sav->replay != NULL) {
3127 keydb_delsecreplay(sav->replay);
3130 if (sav->key_auth != NULL) {
3131 KFREE(sav->key_auth);
3132 sav->key_auth = NULL;
3134 if (sav->key_enc != NULL) {
3135 KFREE(sav->key_enc);
3136 sav->key_enc = NULL;
3142 if (sav->iv != NULL) {
3146 if (sav->lft_c != NULL) {
3150 if (sav->lft_h != NULL) {
3154 if (sav->lft_s != NULL) {
3163 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3168 key_mature(struct secasvar *sav)
3171 int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3172 int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3176 /* check SPI value */
3177 switch (sav->sah->saidx.proto) {
3180 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3181 ipseclog((LOG_DEBUG,
3182 "key_mature: illegal range of SPI %u.\n",
3183 (u_int32_t)ntohl(sav->spi)));
3190 switch (sav->sah->saidx.proto) {
3193 if ((sav->flags & SADB_X_EXT_OLD)
3194 && (sav->flags & SADB_X_EXT_DERIV)) {
3195 ipseclog((LOG_DEBUG, "key_mature: "
3196 "invalid flag (derived) given to old-esp.\n"));
3199 if (sav->alg_auth == SADB_AALG_NONE)
3207 if (sav->flags & SADB_X_EXT_DERIV) {
3208 ipseclog((LOG_DEBUG, "key_mature: "
3209 "invalid flag (derived) given to AH SA.\n"));
3212 if (sav->alg_enc != SADB_EALG_NONE) {
3213 ipseclog((LOG_DEBUG, "key_mature: "
3214 "protocol and algorithm mismated.\n"));
3220 case IPPROTO_IPCOMP:
3221 if (sav->alg_auth != SADB_AALG_NONE) {
3222 ipseclog((LOG_DEBUG, "key_mature: "
3223 "protocol and algorithm mismated.\n"));
3226 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3227 && ntohl(sav->spi) >= 0x10000) {
3228 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3235 if (sav->alg_auth != SADB_X_AALG_TCP_MD5) {
3236 ipseclog((LOG_DEBUG, "key_mature: "
3237 "protocol and algorithm mismated.\n"));
3244 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3245 return EPROTONOSUPPORT;
3248 /* check authentication algorithm */
3249 if ((checkmask & 2) != 0) {
3250 const struct ah_algorithm *algo;
3253 algo = ah_algorithm_lookup(sav->alg_auth);
3255 ipseclog((LOG_DEBUG,"key_mature: "
3256 "unknown authentication algorithm.\n"));
3260 /* algorithm-dependent check */
3262 keylen = sav->key_auth->sadb_key_bits;
3265 if (keylen < algo->keymin || algo->keymax < keylen) {
3266 ipseclog((LOG_DEBUG,
3267 "key_mature: invalid AH key length %d "
3268 "(%d-%d allowed)\n",
3269 keylen, algo->keymin, algo->keymax));
3274 if ((*algo->mature)(sav)) {
3275 /* message generated in per-algorithm function*/
3278 mature = SADB_SATYPE_AH;
3281 if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) {
3282 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n"));
3287 /* check encryption algorithm */
3288 if ((checkmask & 1) != 0) {
3290 const struct esp_algorithm *algo;
3293 algo = esp_algorithm_lookup(sav->alg_enc);
3295 ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n"));
3299 /* algorithm-dependent check */
3301 keylen = sav->key_enc->sadb_key_bits;
3304 if (keylen < algo->keymin || algo->keymax < keylen) {
3305 ipseclog((LOG_DEBUG,
3306 "key_mature: invalid ESP key length %d "
3307 "(%d-%d allowed)\n",
3308 keylen, algo->keymin, algo->keymax));
3313 if ((*algo->mature)(sav)) {
3314 /* message generated in per-algorithm function*/
3317 mature = SADB_SATYPE_ESP;
3320 if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) {
3321 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n"));
3325 ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n"));
3330 /* check compression algorithm */
3331 if ((checkmask & 4) != 0) {
3332 const struct ipcomp_algorithm *algo;
3334 /* algorithm-dependent check */
3335 algo = ipcomp_algorithm_lookup(sav->alg_enc);
3337 ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n"));
3342 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3348 * subroutine for SADB_GET and SADB_DUMP.
3350 static struct mbuf *
3351 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3352 u_int32_t seq, u_int32_t pid)
3354 struct mbuf *result = NULL, *tres = NULL, *m;
3359 SADB_EXT_SA, SADB_X_EXT_SA2,
3360 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3361 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3362 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3363 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3364 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3367 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3372 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3375 switch (dumporder[i]) {
3377 m = key_setsadbsa(sav);
3382 case SADB_X_EXT_SA2:
3383 m = key_setsadbxsa2(sav->sah->saidx.mode,
3384 sav->replay ? sav->replay->count : 0,
3385 sav->sah->saidx.reqid);
3390 case SADB_EXT_ADDRESS_SRC:
3391 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3392 (struct sockaddr *)&sav->sah->saidx.src,
3393 FULLMASK, IPSEC_ULPROTO_ANY);
3398 case SADB_EXT_ADDRESS_DST:
3399 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3400 (struct sockaddr *)&sav->sah->saidx.dst,
3401 FULLMASK, IPSEC_ULPROTO_ANY);
3406 case SADB_EXT_KEY_AUTH:
3409 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3413 case SADB_EXT_KEY_ENCRYPT:
3416 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3420 case SADB_EXT_LIFETIME_CURRENT:
3423 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3427 case SADB_EXT_LIFETIME_HARD:
3430 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3434 case SADB_EXT_LIFETIME_SOFT:
3437 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3441 case SADB_EXT_ADDRESS_PROXY:
3442 case SADB_EXT_IDENTITY_SRC:
3443 case SADB_EXT_IDENTITY_DST:
3444 /* XXX: should we brought from SPD ? */
3445 case SADB_EXT_SENSITIVITY:
3450 if ((!m && !p) || (m && p))
3453 M_PREPEND(tres, l, MB_DONTWAIT);
3456 bcopy(p, mtod(tres, caddr_t), l);
3460 m = key_alloc_mbuf(l);
3463 m_copyback(m, 0, l, p);
3471 m_cat(result, tres);
3473 if (result->m_len < sizeof(struct sadb_msg)) {
3474 result = m_pullup(result, sizeof(struct sadb_msg));
3479 result->m_pkthdr.len = 0;
3480 for (m = result; m; m = m->m_next)
3481 result->m_pkthdr.len += m->m_len;
3483 mtod(result, struct sadb_msg *)->sadb_msg_len =
3484 PFKEY_UNIT64(result->m_pkthdr.len);
3495 * set data into sadb_msg.
3497 static struct mbuf *
3498 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype,
3499 u_int32_t seq, pid_t pid, u_int16_t reserved)
3505 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3508 MGETHDR(m, MB_DONTWAIT, MT_DATA);
3509 if (m && len > MHLEN) {
3510 MCLGET(m, MB_DONTWAIT);
3511 if ((m->m_flags & M_EXT) == 0) {
3518 m->m_pkthdr.len = m->m_len = len;
3521 p = mtod(m, struct sadb_msg *);
3524 p->sadb_msg_version = PF_KEY_V2;
3525 p->sadb_msg_type = type;
3526 p->sadb_msg_errno = 0;
3527 p->sadb_msg_satype = satype;
3528 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3529 p->sadb_msg_reserved = reserved;
3530 p->sadb_msg_seq = seq;
3531 p->sadb_msg_pid = (u_int32_t)pid;
3537 * copy secasvar data into sadb_address.
3539 static struct mbuf *
3540 key_setsadbsa(struct secasvar *sav)
3546 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3547 m = key_alloc_mbuf(len);
3548 if (!m || m->m_next) { /*XXX*/
3554 p = mtod(m, struct sadb_sa *);
3557 p->sadb_sa_len = PFKEY_UNIT64(len);
3558 p->sadb_sa_exttype = SADB_EXT_SA;
3559 p->sadb_sa_spi = sav->spi;
3560 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3561 p->sadb_sa_state = sav->state;
3562 p->sadb_sa_auth = sav->alg_auth;
3563 p->sadb_sa_encrypt = sav->alg_enc;
3564 p->sadb_sa_flags = sav->flags;
3570 * set data into sadb_address.
3572 static struct mbuf *
3573 key_setsadbaddr(u_int16_t exttype, struct sockaddr *saddr,
3574 u_int8_t prefixlen, u_int16_t ul_proto)
3577 struct sadb_address *p;
3580 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3581 PFKEY_ALIGN8(saddr->sa_len);
3582 m = key_alloc_mbuf(len);
3583 if (!m || m->m_next) { /*XXX*/
3589 p = mtod(m, struct sadb_address *);
3592 p->sadb_address_len = PFKEY_UNIT64(len);
3593 p->sadb_address_exttype = exttype;
3594 p->sadb_address_proto = ul_proto;
3595 if (prefixlen == FULLMASK) {
3596 switch (saddr->sa_family) {
3598 prefixlen = sizeof(struct in_addr) << 3;
3601 prefixlen = sizeof(struct in6_addr) << 3;
3607 p->sadb_address_prefixlen = prefixlen;
3608 p->sadb_address_reserved = 0;
3611 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3619 * set data into sadb_ident.
3621 static struct mbuf *
3622 key_setsadbident(u_int16_t exttype, u_int16_t idtype, caddr_t string,
3623 int stringlen, u_int64_t id)
3626 struct sadb_ident *p;
3629 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3630 m = key_alloc_mbuf(len);
3631 if (!m || m->m_next) { /*XXX*/
3637 p = mtod(m, struct sadb_ident *);
3640 p->sadb_ident_len = PFKEY_UNIT64(len);
3641 p->sadb_ident_exttype = exttype;
3642 p->sadb_ident_type = idtype;
3643 p->sadb_ident_reserved = 0;
3644 p->sadb_ident_id = id;
3647 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3655 * set data into sadb_x_sa2.
3657 static struct mbuf *
3658 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3661 struct sadb_x_sa2 *p;
3664 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3665 m = key_alloc_mbuf(len);
3666 if (!m || m->m_next) { /*XXX*/
3672 p = mtod(m, struct sadb_x_sa2 *);
3675 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3676 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3677 p->sadb_x_sa2_mode = mode;
3678 p->sadb_x_sa2_reserved1 = 0;
3679 p->sadb_x_sa2_reserved2 = 0;
3680 p->sadb_x_sa2_sequence = seq;
3681 p->sadb_x_sa2_reqid = reqid;
3687 * set data into sadb_x_policy
3689 static struct mbuf *
3690 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
3693 struct sadb_x_policy *p;
3696 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3697 m = key_alloc_mbuf(len);
3698 if (!m || m->m_next) { /*XXX*/
3704 p = mtod(m, struct sadb_x_policy *);
3707 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3708 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3709 p->sadb_x_policy_type = type;
3710 p->sadb_x_policy_dir = dir;
3711 p->sadb_x_policy_id = id;
3718 * copy a buffer into the new buffer allocated.
3721 key_newbuf(const void *src, u_int len)
3725 KMALLOC(new, caddr_t, len);
3727 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3730 bcopy(src, new, len);
3735 /* compare my own address
3736 * OUT: 1: true, i.e. my address.
3740 key_ismyaddr(struct sockaddr *sa)
3743 struct sockaddr_in *sin;
3744 struct in_ifaddr_container *iac;
3750 panic("key_ismyaddr: NULL pointer is passed.\n");
3752 lwkt_gettoken(&key_token);
3753 switch (sa->sa_family) {
3756 sin = (struct sockaddr_in *)sa;
3757 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
3758 struct in_ifaddr *ia = iac->ia;
3760 if (sin->sin_family == ia->ia_addr.sin_family &&
3761 sin->sin_len == ia->ia_addr.sin_len &&
3762 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3764 lwkt_reltoken(&key_token);
3773 res = key_ismyaddr6((struct sockaddr_in6 *)sa);
3780 lwkt_reltoken(&key_token);
3786 * compare my own address for IPv6.
3789 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3791 #include <netinet6/in6_var.h>
3794 key_ismyaddr6(struct sockaddr_in6 *sin6)
3796 struct in6_ifaddr *ia;
3797 struct in6_multi *in6m;
3799 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3800 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3801 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3806 * XXX why do we care about multlicast here while we don't care
3807 * about IPv4 multicast??
3811 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3816 /* loopback, just for safety */
3817 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3825 * compare two secasindex structure.
3826 * flag can specify to compare 2 saidxes.
3827 * compare two secasindex structure without both mode and reqid.
3828 * don't compare port.
3830 * saidx0: source, it can be in SAD.
3837 key_cmpsaidx(struct secasindex *saidx0, struct secasindex *saidx1,
3841 if (saidx0 == NULL && saidx1 == NULL)
3844 if (saidx0 == NULL || saidx1 == NULL)
3847 if (saidx0->proto != saidx1->proto)
3850 if (flag == CMP_EXACTLY) {
3851 if (saidx0->mode != saidx1->mode)
3853 if (saidx0->reqid != saidx1->reqid)
3855 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 ||
3856 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0)
3860 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3861 if (flag == CMP_MODE_REQID
3862 ||flag == CMP_REQID) {
3864 * If reqid of SPD is non-zero, unique SA is required.
3865 * The result must be of same reqid in this case.
3867 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3871 if (flag == CMP_MODE_REQID) {
3872 if (saidx0->mode != IPSEC_MODE_ANY
3873 && saidx0->mode != saidx1->mode)
3877 if (key_sockaddrcmp((struct sockaddr *)&saidx0->src,
3878 (struct sockaddr *)&saidx1->src, 0) != 0) {
3881 if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst,
3882 (struct sockaddr *)&saidx1->dst, 0) != 0) {
3891 * compare two secindex structure exactly.
3893 * spidx0: source, it is often in SPD.
3894 * spidx1: object, it is often from PFKEY message.
3900 key_cmpspidx_exactly(struct secpolicyindex *spidx0,
3901 struct secpolicyindex *spidx1)
3904 if (spidx0 == NULL && spidx1 == NULL)
3907 if (spidx0 == NULL || spidx1 == NULL)
3910 if (spidx0->prefs != spidx1->prefs
3911 || spidx0->prefd != spidx1->prefd
3912 || spidx0->ul_proto != spidx1->ul_proto)
3915 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src,
3916 (struct sockaddr *)&spidx1->src, 1) != 0) {
3919 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst,
3920 (struct sockaddr *)&spidx1->dst, 1) != 0) {
3928 * compare two secindex structure with mask.
3930 * spidx0: source, it is often in SPD.
3931 * spidx1: object, it is often from IP header.
3937 key_cmpspidx_withmask(struct secpolicyindex *spidx0,
3938 struct secpolicyindex *spidx1)
3941 if (spidx0 == NULL && spidx1 == NULL)
3944 if (spidx0 == NULL || spidx1 == NULL)
3947 if (spidx0->src.ss_family != spidx1->src.ss_family ||
3948 spidx0->dst.ss_family != spidx1->dst.ss_family ||
3949 spidx0->src.ss_len != spidx1->src.ss_len ||
3950 spidx0->dst.ss_len != spidx1->dst.ss_len)
3953 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3954 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3955 && spidx0->ul_proto != spidx1->ul_proto)
3958 switch (spidx0->src.ss_family) {
3960 if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
3961 && satosin(&spidx0->src)->sin_port !=
3962 satosin(&spidx1->src)->sin_port)
3964 if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr,
3965 (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs))
3969 if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
3970 && satosin6(&spidx0->src)->sin6_port !=
3971 satosin6(&spidx1->src)->sin6_port)
3974 * scope_id check. if sin6_scope_id is 0, we regard it
3975 * as a wildcard scope, which matches any scope zone ID.
3977 if (satosin6(&spidx0->src)->sin6_scope_id &&
3978 satosin6(&spidx1->src)->sin6_scope_id &&
3979 satosin6(&spidx0->src)->sin6_scope_id !=
3980 satosin6(&spidx1->src)->sin6_scope_id)
3982 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr,
3983 (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs))
3988 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0)
3993 switch (spidx0->dst.ss_family) {
3995 if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY
3996 && satosin(&spidx0->dst)->sin_port !=
3997 satosin(&spidx1->dst)->sin_port)
3999 if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr,
4000 (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd))
4004 if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY
4005 && satosin6(&spidx0->dst)->sin6_port !=
4006 satosin6(&spidx1->dst)->sin6_port)
4009 * scope_id check. if sin6_scope_id is 0, we regard it
4010 * as a wildcard scope, which matches any scope zone ID.
4012 if (satosin6(&spidx0->src)->sin6_scope_id &&
4013 satosin6(&spidx1->src)->sin6_scope_id &&
4014 satosin6(&spidx0->dst)->sin6_scope_id !=
4015 satosin6(&spidx1->dst)->sin6_scope_id)
4017 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->dst)->sin6_addr,
4018 (caddr_t)&satosin6(&spidx1->dst)->sin6_addr, spidx0->prefd))
4023 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0)
4028 /* XXX Do we check other field ? e.g. flowinfo */
4033 /* returns 0 on match */
4035 key_sockaddrcmp(struct sockaddr *sa1, struct sockaddr *sa2, int port)
4037 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4040 switch (sa1->sa_family) {
4042 if (sa1->sa_len != sizeof(struct sockaddr_in))
4044 if (satosin(sa1)->sin_addr.s_addr !=
4045 satosin(sa2)->sin_addr.s_addr) {
4048 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4052 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4053 return 1; /*EINVAL*/
4054 if (satosin6(sa1)->sin6_scope_id !=
4055 satosin6(sa2)->sin6_scope_id) {
4058 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4059 &satosin6(sa2)->sin6_addr)) {
4063 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4067 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4076 * compare two buffers with mask.
4080 * bits: Number of bits to compare
4086 key_bbcmp(caddr_t p1, caddr_t p2, u_int bits)
4090 /* XXX: This could be considerably faster if we compare a word
4091 * at a time, but it is complicated on LSB Endian machines */
4093 /* Handle null pointers */
4094 if (p1 == NULL || p2 == NULL)
4104 mask = ~((1<<(8-bits))-1);
4105 if ((*p1 & mask) != (*p2 & mask))
4108 return 1; /* Match! */
4113 * scanning SPD and SAD to check status for each entries,
4114 * and do to remove or to expire.
4115 * XXX: year 2038 problem may remain.
4118 key_timehandler(void *__dummy)
4125 lwkt_gettoken(&key_token);
4129 struct secpolicy *sp, *nextsp;
4131 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4132 for (sp = LIST_FIRST(&sptree[dir]);
4136 nextsp = LIST_NEXT(sp, chain);
4138 if (sp->state == IPSEC_SPSTATE_DEAD) {
4143 if (sp->lifetime == 0 && sp->validtime == 0)
4146 /* the deletion will occur next time */
4148 && tv.tv_sec - sp->created > sp->lifetime)
4150 && tv.tv_sec - sp->lastused > sp->validtime)) {
4151 sp->state = IPSEC_SPSTATE_DEAD;
4161 struct secashead *sah, *nextsah;
4162 struct secasvar *sav, *nextsav;
4164 for (sah = LIST_FIRST(&sahtree);
4168 nextsah = LIST_NEXT(sah, chain);
4170 /* if sah has been dead, then delete it and process next sah. */
4171 if (sah->state == SADB_SASTATE_DEAD) {
4176 /* if LARVAL entry doesn't become MATURE, delete it. */
4177 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
4181 nextsav = LIST_NEXT(sav, chain);
4183 if (tv.tv_sec - sav->created > key_larval_lifetime) {
4189 * check MATURE entry to start to send expire message
4192 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
4196 nextsav = LIST_NEXT(sav, chain);
4198 /* we don't need to check. */
4199 if (sav->lft_s == NULL)
4203 if (sav->lft_c == NULL) {
4204 ipseclog((LOG_DEBUG,"key_timehandler: "
4205 "There is no CURRENT time, why?\n"));
4209 /* check SOFT lifetime */
4210 if (sav->lft_s->sadb_lifetime_addtime != 0
4211 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4213 * check the SA if it has been used.
4214 * when it hasn't been used, delete it.
4215 * i don't think such SA will be used.
4217 if (sav->lft_c->sadb_lifetime_usetime == 0) {
4218 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4222 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4224 * XXX If we keep to send expire
4225 * message in the status of
4226 * DYING. Do remove below code.
4232 /* check SOFT lifetime by bytes */
4234 * XXX I don't know the way to delete this SA
4235 * when new SA is installed. Caution when it's
4236 * installed too big lifetime by time.
4238 else if (sav->lft_s->sadb_lifetime_bytes != 0
4239 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4241 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4243 * XXX If we keep to send expire
4244 * message in the status of
4245 * DYING. Do remove below code.
4251 /* check DYING entry to change status to DEAD. */
4252 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
4256 nextsav = LIST_NEXT(sav, chain);
4258 /* we don't need to check. */
4259 if (sav->lft_h == NULL)
4263 if (sav->lft_c == NULL) {
4264 ipseclog((LOG_DEBUG, "key_timehandler: "
4265 "There is no CURRENT time, why?\n"));
4269 if (sav->lft_h->sadb_lifetime_addtime != 0
4270 && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) {
4271 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4275 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4276 else if (sav->lft_s != NULL
4277 && sav->lft_s->sadb_lifetime_addtime != 0
4278 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4280 * XXX: should be checked to be
4281 * installed the valid SA.
4285 * If there is no SA then sending
4291 /* check HARD lifetime by bytes */
4292 else if (sav->lft_h->sadb_lifetime_bytes != 0
4293 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4294 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4300 /* delete entry in DEAD */
4301 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
4305 nextsav = LIST_NEXT(sav, chain);
4308 if (sav->state != SADB_SASTATE_DEAD) {
4309 ipseclog((LOG_DEBUG, "key_timehandler: "
4310 "invalid sav->state "
4311 "(queue: %d SA: %d): "
4313 SADB_SASTATE_DEAD, sav->state));
4317 * do not call key_freesav() here.
4318 * sav should already be freed, and sav->refcnt
4319 * shows other references to sav
4320 * (such as from SPD).
4326 #ifndef IPSEC_NONBLOCK_ACQUIRE
4329 struct secacq *acq, *nextacq;
4331 for (acq = LIST_FIRST(&acqtree);
4335 nextacq = LIST_NEXT(acq, chain);
4337 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4338 && __LIST_CHAINED(acq)) {
4339 LIST_REMOVE(acq, chain);
4348 struct secspacq *acq, *nextacq;
4350 for (acq = LIST_FIRST(&spacqtree);
4354 nextacq = LIST_NEXT(acq, chain);
4356 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4357 && __LIST_CHAINED(acq)) {
4358 LIST_REMOVE(acq, chain);
4364 /* initialize random seed */
4365 if (key_tick_init_random++ > key_int_random) {
4366 key_tick_init_random = 0;
4370 #ifndef IPSEC_DEBUG2
4371 /* do exchange to tick time !! */
4372 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
4373 #endif /* IPSEC_DEBUG2 */
4375 lwkt_reltoken(&key_token);
4380 * to initialize a seed for random()
4389 skrandom(tv.tv_usec);
4399 key_randomfill(&value, sizeof(value));
4404 key_randomfill(void *p, size_t l)
4408 static int warn = 1;
4411 n = (size_t)read_random(p, (u_int)l);
4415 bcopy(&v, (u_int8_t *)p + n,
4416 l - n < sizeof(v) ? l - n : sizeof(v));
4420 kprintf("WARNING: pseudo-random number generator "
4421 "used for IPsec processing\n");
4428 * map SADB_SATYPE_* to IPPROTO_*.
4429 * if satype == SADB_SATYPE then satype is mapped to ~0.
4431 * 0: invalid satype.
4434 key_satype2proto(u_int8_t satype)
4437 case SADB_SATYPE_UNSPEC:
4438 return IPSEC_PROTO_ANY;
4439 case SADB_SATYPE_AH:
4441 case SADB_SATYPE_ESP:
4443 case SADB_X_SATYPE_IPCOMP:
4444 return IPPROTO_IPCOMP;
4445 case SADB_X_SATYPE_TCPSIGNATURE:
4455 * map IPPROTO_* to SADB_SATYPE_*
4457 * 0: invalid protocol type.
4460 key_proto2satype(u_int16_t proto)
4464 return SADB_SATYPE_AH;
4466 return SADB_SATYPE_ESP;
4467 case IPPROTO_IPCOMP:
4468 return SADB_X_SATYPE_IPCOMP;
4470 return SADB_X_SATYPE_TCPSIGNATURE;
4480 * SADB_GETSPI processing is to receive
4481 * <base, (SA2), src address, dst address, (SPI range)>
4482 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4483 * tree with the status of LARVAL, and send
4484 * <base, SA(*), address(SD)>
4487 * IN: mhp: pointer to the pointer to each header.
4488 * OUT: NULL if fail.
4489 * other if success, return pointer to the message to send.
4492 key_getspi(struct socket *so, struct mbuf *m,
4493 const struct sadb_msghdr *mhp)
4495 struct sadb_address *src0, *dst0;
4496 struct secasindex saidx;
4497 struct secashead *newsah;
4498 struct secasvar *newsav;
4506 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4507 panic("key_getspi: NULL pointer is passed.\n");
4509 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4510 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4511 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4512 return key_senderror(so, m, EINVAL);
4514 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4515 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4516 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4517 return key_senderror(so, m, EINVAL);
4519 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4520 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4521 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4523 mode = IPSEC_MODE_ANY;
4527 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4528 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4530 /* map satype to proto */
4531 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4532 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
4533 return key_senderror(so, m, EINVAL);
4536 /* make sure if port number is zero. */
4537 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
4539 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4540 sizeof(struct sockaddr_in))
4541 return key_senderror(so, m, EINVAL);
4542 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
4545 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4546 sizeof(struct sockaddr_in6))
4547 return key_senderror(so, m, EINVAL);
4548 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
4553 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
4555 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4556 sizeof(struct sockaddr_in))
4557 return key_senderror(so, m, EINVAL);
4558 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
4561 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4562 sizeof(struct sockaddr_in6))
4563 return key_senderror(so, m, EINVAL);
4564 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
4570 /* XXX boundary check against sa_len */
4571 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4573 /* SPI allocation */
4574 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4577 return key_senderror(so, m, EINVAL);
4579 /* get a SA index */
4580 if ((newsah = key_getsah(&saidx)) == NULL) {
4581 /* create a new SA index */
4582 if ((newsah = key_newsah(&saidx)) == NULL) {
4583 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
4584 return key_senderror(so, m, ENOBUFS);
4590 newsav = key_newsav(m, mhp, newsah, &error);
4591 if (newsav == NULL) {
4592 /* XXX don't free new SA index allocated in above. */
4593 return key_senderror(so, m, error);
4597 newsav->spi = htonl(spi);
4599 #ifndef IPSEC_NONBLOCK_ACQUIRE
4600 /* delete the entry in acqtree */
4601 if (mhp->msg->sadb_msg_seq != 0) {
4603 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4604 /* reset counter in order to deletion by timehandler. */
4607 acq->created = tv.tv_sec;
4614 struct mbuf *n, *nn;
4615 struct sadb_sa *m_sa;
4616 struct sadb_msg *newmsg;
4619 /* create new sadb_msg to reply. */
4620 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4621 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4623 return key_senderror(so, m, ENOBUFS);
4625 MGETHDR(n, MB_DONTWAIT, MT_DATA);
4627 MCLGET(n, MB_DONTWAIT);
4628 if ((n->m_flags & M_EXT) == 0) {
4634 return key_senderror(so, m, ENOBUFS);
4640 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4641 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4643 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4644 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4645 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4646 m_sa->sadb_sa_spi = htonl(spi);
4647 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4651 panic("length inconsistency in key_getspi");
4654 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4655 SADB_EXT_ADDRESS_DST);
4658 return key_senderror(so, m, ENOBUFS);
4661 if (n->m_len < sizeof(struct sadb_msg)) {
4662 n = m_pullup(n, sizeof(struct sadb_msg));
4664 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4667 n->m_pkthdr.len = 0;
4668 for (nn = n; nn; nn = nn->m_next)
4669 n->m_pkthdr.len += nn->m_len;
4671 newmsg = mtod(n, struct sadb_msg *);
4672 newmsg->sadb_msg_seq = newsav->seq;
4673 newmsg->sadb_msg_errno = 0;
4674 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4677 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4682 * allocating new SPI
4683 * called by key_getspi().
4689 key_do_getnewspi(struct sadb_spirange *spirange,
4690 struct secasindex *saidx)
4694 int count = key_spi_trycnt;
4696 /* set spi range to allocate */
4697 if (spirange != NULL) {
4698 min = spirange->sadb_spirange_min;
4699 max = spirange->sadb_spirange_max;
4701 min = key_spi_minval;
4702 max = key_spi_maxval;
4704 /* IPCOMP needs 2-byte SPI */
4705 if (saidx->proto == IPPROTO_IPCOMP) {
4712 t = min; min = max; max = t;
4717 if (key_checkspidup(saidx, min) != NULL) {
4718 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min));
4722 count--; /* taking one cost. */
4730 /* when requesting to allocate spi ranged */
4732 /* generate pseudo-random SPI value ranged. */
4733 newspi = min + (key_random() % (max - min + 1));
4735 if (key_checkspidup(saidx, newspi) == NULL)
4739 if (count == 0 || newspi == 0) {
4740 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
4746 keystat.getspi_count =
4747 (keystat.getspi_count + key_spi_trycnt - count) / 2;
4753 * SADB_UPDATE processing
4755 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4756 * key(AE), (identity(SD),) (sensitivity)>
4757 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
4759 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4760 * (identity(SD),) (sensitivity)>
4763 * m will always be freed.
4766 key_update(struct socket *so, struct mbuf *m,
4767 const struct sadb_msghdr *mhp)
4769 struct sadb_sa *sa0;
4770 struct sadb_address *src0, *dst0;
4771 struct secasindex saidx;
4772 struct secashead *sah;
4773 struct secasvar *sav;
4780 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4781 panic("key_update: NULL pointer is passed.\n");
4783 /* map satype to proto */
4784 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4785 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
4786 return key_senderror(so, m, EINVAL);
4789 if (mhp->ext[SADB_EXT_SA] == NULL ||
4790 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4791 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4792 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4793 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4794 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4795 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4796 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4797 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4798 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4799 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4800 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4801 return key_senderror(so, m, EINVAL);
4803 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4804 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4805 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4806 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4807 return key_senderror(so, m, EINVAL);
4809 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4810 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4811 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4813 mode = IPSEC_MODE_ANY;
4816 /* XXX boundary checking for other extensions */
4818 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4819 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4820 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4822 /* XXX boundary check against sa_len */
4823 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4825 /* get a SA header */
4826 if ((sah = key_getsah(&saidx)) == NULL) {
4827 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
4828 return key_senderror(so, m, ENOENT);
4831 /* set spidx if there */
4833 error = key_setident(sah, m, mhp);
4835 return key_senderror(so, m, error);
4837 /* find a SA with sequence number. */
4838 #ifdef IPSEC_DOSEQCHECK
4839 if (mhp->msg->sadb_msg_seq != 0
4840 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
4841 ipseclog((LOG_DEBUG,
4842 "key_update: no larval SA with sequence %u exists.\n",
4843 mhp->msg->sadb_msg_seq));
4844 return key_senderror(so, m, ENOENT);
4847 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
4848 ipseclog((LOG_DEBUG,
4849 "key_update: no such a SA found (spi:%u)\n",
4850 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4851 return key_senderror(so, m, EINVAL);
4855 /* validity check */
4856 if (sav->sah->saidx.proto != proto) {
4857 ipseclog((LOG_DEBUG,
4858 "key_update: protocol mismatched (DB=%u param=%u)\n",
4859 sav->sah->saidx.proto, proto));
4860 return key_senderror(so, m, EINVAL);
4862 #ifdef IPSEC_DOSEQCHECK
4863 if (sav->spi != sa0->sadb_sa_spi) {
4864 ipseclog((LOG_DEBUG,
4865 "key_update: SPI mismatched (DB:%u param:%u)\n",
4866 (u_int32_t)ntohl(sav->spi),
4867 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4868 return key_senderror(so, m, EINVAL);
4871 if (sav->pid != mhp->msg->sadb_msg_pid) {
4872 ipseclog((LOG_DEBUG,
4873 "key_update: pid mismatched (DB:%u param:%u)\n",
4874 sav->pid, mhp->msg->sadb_msg_pid));
4875 return key_senderror(so, m, EINVAL);
4878 /* copy sav values */
4879 error = key_setsaval(sav, m, mhp);
4882 return key_senderror(so, m, error);
4885 /* check SA values to be mature. */
4886 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
4888 return key_senderror(so, m, 0);
4894 /* set msg buf from mhp */
4895 n = key_getmsgbuf_x1(m, mhp);
4897 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
4898 return key_senderror(so, m, ENOBUFS);
4902 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
4907 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
4908 * only called by key_update().
4911 * others : found, pointer to a SA.
4913 #ifdef IPSEC_DOSEQCHECK
4914 static struct secasvar *
4915 key_getsavbyseq(struct secashead *sah, u_int32_t seq)
4917 struct secasvar *sav;
4920 state = SADB_SASTATE_LARVAL;
4922 /* search SAD with sequence number ? */
4923 LIST_FOREACH(sav, &sah->savtree[state], chain) {
4925 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
4927 if (sav->seq == seq) {
4929 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
4930 kprintf("DP key_getsavbyseq cause "
4931 "refcnt++:%d SA:%p\n",
4942 * SADB_ADD processing
4943 * add a entry to SA database, when received
4944 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4945 * key(AE), (identity(SD),) (sensitivity)>
4948 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4949 * (identity(SD),) (sensitivity)>
4952 * IGNORE identity and sensitivity messages.
4954 * m will always be freed.
4957 key_add(struct socket *so, struct mbuf *m,
4958 const struct sadb_msghdr *mhp)
4960 struct sadb_sa *sa0;
4961 struct sadb_address *src0, *dst0;
4962 struct secasindex saidx;
4963 struct secashead *newsah;
4964 struct secasvar *newsav;
4971 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4972 panic("key_add: NULL pointer is passed.\n");
4974 /* map satype to proto */
4975 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4976 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
4977 return key_senderror(so, m, EINVAL);
4980 if (mhp->ext[SADB_EXT_SA] == NULL ||
4981 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4982 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4983 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4984 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4985 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4986 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4987 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4988 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4989 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4990 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4991 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4992 return key_senderror(so, m, EINVAL);
4994 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4995 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4996 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4998 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4999 return key_senderror(so, m, EINVAL);
5001 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
5002 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5003 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5005 mode = IPSEC_MODE_ANY;
5009 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5010 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5011 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5013 /* XXX boundary check against sa_len */
5014 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5016 /* get a SA header */
5017 if ((newsah = key_getsah(&saidx)) == NULL) {
5018 /* create a new SA header */
5019 if ((newsah = key_newsah(&saidx)) == NULL) {
5020 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
5021 return key_senderror(so, m, ENOBUFS);
5025 /* set spidx if there */
5027 error = key_setident(newsah, m, mhp);
5029 return key_senderror(so, m, error);
5032 /* create new SA entry. */
5033 /* We can create new SA only if SPI is differenct. */
5034 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
5035 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
5036 return key_senderror(so, m, EEXIST);
5038 newsav = key_newsav(m, mhp, newsah, &error);
5039 if (newsav == NULL) {
5040 return key_senderror(so, m, error);
5043 /* check SA values to be mature. */
5044 if ((error = key_mature(newsav)) != 0) {
5045 key_freesav(newsav);
5046 return key_senderror(so, m, error);
5050 * don't call key_freesav() here, as we would like to keep the SA
5051 * in the database on success.
5057 /* set msg buf from mhp */
5058 n = key_getmsgbuf_x1(m, mhp);
5060 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
5061 return key_senderror(so, m, ENOBUFS);
5065 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5071 key_setident(struct secashead *sah, struct mbuf *m,
5072 const struct sadb_msghdr *mhp)
5074 const struct sadb_ident *idsrc, *iddst;
5075 int idsrclen, iddstlen;
5078 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5079 panic("key_setident: NULL pointer is passed.\n");
5081 /* don't make buffer if not there */
5082 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
5083 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5089 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
5090 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5091 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
5095 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5096 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5097 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5098 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5100 /* validity check */
5101 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5102 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
5106 switch (idsrc->sadb_ident_type) {
5107 case SADB_IDENTTYPE_PREFIX:
5108 case SADB_IDENTTYPE_FQDN:
5109 case SADB_IDENTTYPE_USERFQDN:
5111 /* XXX do nothing */
5117 /* make structure */
5118 KMALLOC(sah->idents, struct sadb_ident *, idsrclen);
5119 if (sah->idents == NULL) {
5120 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5123 KMALLOC(sah->identd, struct sadb_ident *, iddstlen);
5124 if (sah->identd == NULL) {
5127 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5130 bcopy(idsrc, sah->idents, idsrclen);
5131 bcopy(iddst, sah->identd, iddstlen);
5137 * m will not be freed on return.
5138 * it is caller's responsibility to free the result.
5140 static struct mbuf *
5141 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5146 if (m == NULL || mhp == NULL || mhp->msg == NULL)
5147 panic("key_getmsgbuf_x1: NULL pointer is passed.\n");
5149 /* create new sadb_msg to reply. */
5150 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5151 SADB_EXT_SA, SADB_X_EXT_SA2,
5152 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5153 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5154 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5158 if (n->m_len < sizeof(struct sadb_msg)) {
5159 n = m_pullup(n, sizeof(struct sadb_msg));
5163 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5164 mtod(n, struct sadb_msg *)->sadb_msg_len =
5165 PFKEY_UNIT64(n->m_pkthdr.len);
5170 static int key_delete_all (struct socket *, struct mbuf *,
5171 const struct sadb_msghdr *, u_int16_t);
5174 * SADB_DELETE processing
5176 * <base, SA(*), address(SD)>
5177 * from the ikmpd, and set SADB_SASTATE_DEAD,
5179 * <base, SA(*), address(SD)>
5182 * m will always be freed.
5185 key_delete(struct socket *so, struct mbuf *m,
5186 const struct sadb_msghdr *mhp)
5188 struct sadb_sa *sa0;
5189 struct sadb_address *src0, *dst0;
5190 struct secasindex saidx;
5191 struct secashead *sah;
5192 struct secasvar *sav = NULL;
5196 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5197 panic("key_delete: NULL pointer is passed.\n");
5199 /* map satype to proto */
5200 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5201 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
5202 return key_senderror(so, m, EINVAL);
5205 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5206 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5207 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5208 return key_senderror(so, m, EINVAL);
5211 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5212 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5213 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5214 return key_senderror(so, m, EINVAL);
5217 if (mhp->ext[SADB_EXT_SA] == NULL) {
5219 * Caller wants us to delete all non-LARVAL SAs
5220 * that match the src/dst. This is used during
5221 * IKE INITIAL-CONTACT.
5223 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
5224 return key_delete_all(so, m, mhp, proto);
5225 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5226 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5227 return key_senderror(so, m, EINVAL);
5230 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5231 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5232 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5234 /* XXX boundary check against sa_len */
5235 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5237 /* get a SA header */
5238 LIST_FOREACH(sah, &sahtree, chain) {
5239 if (sah->state == SADB_SASTATE_DEAD)
5241 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5244 /* get a SA with SPI. */
5245 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5250 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
5251 return key_senderror(so, m, ENOENT);
5254 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5260 struct sadb_msg *newmsg;
5262 /* create new sadb_msg to reply. */
5263 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5264 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5266 return key_senderror(so, m, ENOBUFS);
5268 if (n->m_len < sizeof(struct sadb_msg)) {
5269 n = m_pullup(n, sizeof(struct sadb_msg));
5271 return key_senderror(so, m, ENOBUFS);
5273 newmsg = mtod(n, struct sadb_msg *);
5274 newmsg->sadb_msg_errno = 0;
5275 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5278 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5283 * delete all SAs for src/dst. Called from key_delete().
5286 key_delete_all(struct socket *so, struct mbuf *m,
5287 const struct sadb_msghdr *mhp, u_int16_t proto)
5289 struct sadb_address *src0, *dst0;
5290 struct secasindex saidx;
5291 struct secashead *sah;
5292 struct secasvar *sav, *nextsav;
5293 u_int stateidx, state;
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 LIST_FOREACH(sah, &sahtree, chain) {
5302 if (sah->state == SADB_SASTATE_DEAD)
5304 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5307 /* Delete all non-LARVAL SAs. */
5309 stateidx < _ARRAYLEN(saorder_state_alive);
5311 state = saorder_state_alive[stateidx];
5312 if (state == SADB_SASTATE_LARVAL)
5314 for (sav = LIST_FIRST(&sah->savtree[state]);
5315 sav != NULL; sav = nextsav) {
5316 nextsav = LIST_NEXT(sav, chain);
5318 if (sav->state != state) {
5319 ipseclog((LOG_DEBUG, "key_delete_all: "
5320 "invalid sav->state "
5321 "(queue: %d SA: %d)\n",
5322 state, sav->state));
5326 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5333 struct sadb_msg *newmsg;
5335 /* create new sadb_msg to reply. */
5336 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5337 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5339 return key_senderror(so, m, ENOBUFS);
5341 if (n->m_len < sizeof(struct sadb_msg)) {
5342 n = m_pullup(n, sizeof(struct sadb_msg));
5344 return key_senderror(so, m, ENOBUFS);
5346 newmsg = mtod(n, struct sadb_msg *);
5347 newmsg->sadb_msg_errno = 0;
5348 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5351 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5356 * SADB_GET processing
5358 * <base, SA(*), address(SD)>
5359 * from the ikmpd, and get a SP and a SA to respond,
5361 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5362 * (identity(SD),) (sensitivity)>
5365 * m will always be freed.
5368 key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5370 struct sadb_sa *sa0;
5371 struct sadb_address *src0, *dst0;
5372 struct secasindex saidx;
5373 struct secashead *sah;
5374 struct secasvar *sav = NULL;
5378 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5379 panic("key_get: NULL pointer is passed.\n");
5381 /* map satype to proto */
5382 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5383 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
5384 return key_senderror(so, m, EINVAL);
5387 if (mhp->ext[SADB_EXT_SA] == NULL ||
5388 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5389 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5390 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5391 return key_senderror(so, m, EINVAL);
5393 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5394 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5395 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5396 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5397 return key_senderror(so, m, EINVAL);
5400 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5401 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5402 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5404 /* XXX boundary check against sa_len */
5405 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5407 /* get a SA header */
5408 LIST_FOREACH(sah, &sahtree, chain) {
5409 if (sah->state == SADB_SASTATE_DEAD)
5411 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5414 /* get a SA with SPI. */
5415 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5420 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
5421 return key_senderror(so, m, ENOENT);
5428 /* map proto to satype */
5429 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5430 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
5431 return key_senderror(so, m, EINVAL);
5434 /* create new sadb_msg to reply. */
5435 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5436 mhp->msg->sadb_msg_pid);
5438 return key_senderror(so, m, ENOBUFS);
5441 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5445 /* XXX make it sysctl-configurable? */
5447 key_getcomb_setlifetime(struct sadb_comb *comb)
5450 comb->sadb_comb_soft_allocations = 1;
5451 comb->sadb_comb_hard_allocations = 1;
5452 comb->sadb_comb_soft_bytes = 0;
5453 comb->sadb_comb_hard_bytes = 0;
5454 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5455 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5456 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5457 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5462 * XXX reorder combinations by preference
5463 * XXX no idea if the user wants ESP authentication or not
5465 static struct mbuf *
5466 key_getcomb_esp(void)
5468 struct sadb_comb *comb;
5469 const struct esp_algorithm *algo;
5470 struct mbuf *result = NULL, *m, *n;
5474 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5477 for (i = 1; i <= SADB_EALG_MAX; i++) {
5478 algo = esp_algorithm_lookup(i);
5482 if (algo->keymax < ipsec_esp_keymin)
5484 if (algo->keymin < ipsec_esp_keymin)
5485 encmin = ipsec_esp_keymin;
5487 encmin = algo->keymin;
5490 m = key_getcomb_ah();
5494 panic("assumption failed in key_getcomb_esp");
5496 MGET(m, MB_DONTWAIT, MT_DATA);
5501 bzero(mtod(m, caddr_t), m->m_len);
5508 for (n = m; n; n = n->m_next)
5512 panic("assumption failed in key_getcomb_esp");
5515 for (off = 0; off < totlen; off += l) {
5516 n = m_pulldown(m, off, l, &o);
5518 /* m is already freed */
5521 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
5522 bzero(comb, sizeof(*comb));
5523 key_getcomb_setlifetime(comb);
5524 comb->sadb_comb_encrypt = i;
5525 comb->sadb_comb_encrypt_minbits = encmin;
5526 comb->sadb_comb_encrypt_maxbits = algo->keymax;
5545 * XXX reorder combinations by preference
5547 static struct mbuf *
5548 key_getcomb_ah(void)
5550 struct sadb_comb *comb;
5551 const struct ah_algorithm *algo;
5555 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5558 for (i = 1; i <= SADB_AALG_MAX; i++) {
5560 /* we prefer HMAC algorithms, not old algorithms */
5561 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
5564 algo = ah_algorithm_lookup(i);
5568 if (algo->keymax < ipsec_ah_keymin)
5570 if (algo->keymin < ipsec_ah_keymin)
5571 min = ipsec_ah_keymin;
5578 panic("assumption failed in key_getcomb_ah");
5580 MGET(m, MB_DONTWAIT, MT_DATA);
5587 M_PREPEND(m, l, MB_DONTWAIT);
5591 comb = mtod(m, struct sadb_comb *);
5592 bzero(comb, sizeof(*comb));
5593 key_getcomb_setlifetime(comb);
5594 comb->sadb_comb_auth = i;
5595 comb->sadb_comb_auth_minbits = min;
5596 comb->sadb_comb_auth_maxbits = algo->keymax;
5603 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
5604 * XXX reorder combinations by preference
5606 static struct mbuf *
5607 key_getcomb_ipcomp(void)
5609 struct sadb_comb *comb;
5610 const struct ipcomp_algorithm *algo;
5613 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5616 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
5617 algo = ipcomp_algorithm_lookup(i);
5624 panic("assumption failed in key_getcomb_ipcomp");
5626 MGET(m, MB_DONTWAIT, MT_DATA);
5633 M_PREPEND(m, l, MB_DONTWAIT);
5637 comb = mtod(m, struct sadb_comb *);
5638 bzero(comb, sizeof(*comb));
5639 key_getcomb_setlifetime(comb);
5640 comb->sadb_comb_encrypt = i;
5641 /* what should we set into sadb_comb_*_{min,max}bits? */
5648 * XXX no way to pass mode (transport/tunnel) to userland
5649 * XXX replay checking?
5650 * XXX sysctl interface to ipsec_{ah,esp}_keymin
5652 static struct mbuf *
5653 key_getprop(const struct secasindex *saidx)
5655 struct sadb_prop *prop;
5657 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
5660 switch (saidx->proto) {
5663 m = key_getcomb_esp();
5667 m = key_getcomb_ah();
5669 case IPPROTO_IPCOMP:
5670 m = key_getcomb_ipcomp();
5678 M_PREPEND(m, l, MB_DONTWAIT);
5683 for (n = m; n; n = n->m_next)
5686 prop = mtod(m, struct sadb_prop *);
5687 bzero(prop, sizeof(*prop));
5688 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
5689 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
5690 prop->sadb_prop_replay = 32; /* XXX */
5696 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
5698 * <base, SA, address(SD), (address(P)), x_policy,
5699 * (identity(SD),) (sensitivity,) proposal>
5700 * to KMD, and expect to receive
5701 * <base> with SADB_ACQUIRE if error occured,
5703 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
5704 * from KMD by PF_KEY.
5706 * XXX x_policy is outside of RFC2367 (KAME extension).
5707 * XXX sensitivity is not supported.
5708 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
5709 * see comment for key_getcomb_ipcomp().
5713 * others: error number
5716 key_acquire(struct secasindex *saidx, struct secpolicy *sp)
5718 struct mbuf *result = NULL, *m;
5719 #ifndef IPSEC_NONBLOCK_ACQUIRE
5720 struct secacq *newacq;
5728 panic("key_acquire: NULL pointer is passed.\n");
5729 if ((satype = key_proto2satype(saidx->proto)) == 0)
5730 panic("key_acquire: invalid proto is passed.\n");
5732 #ifndef IPSEC_NONBLOCK_ACQUIRE
5734 * We never do anything about acquirng SA. There is anather
5735 * solution that kernel blocks to send SADB_ACQUIRE message until
5736 * getting something message from IKEd. In later case, to be
5737 * managed with ACQUIRING list.
5739 /* get a entry to check whether sending message or not. */
5740 if ((newacq = key_getacq(saidx)) != NULL) {
5741 if (key_blockacq_count < newacq->count) {
5742 /* reset counter and do send message. */
5745 /* increment counter and do nothing. */
5750 /* make new entry for blocking to send SADB_ACQUIRE. */
5751 if ((newacq = key_newacq(saidx)) == NULL)
5754 /* add to acqtree */
5755 LIST_INSERT_HEAD(&acqtree, newacq, chain);
5760 #ifndef IPSEC_NONBLOCK_ACQUIRE
5763 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
5765 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
5772 /* set sadb_address for saidx's. */
5773 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
5774 (struct sockaddr *)&saidx->src, FULLMASK, IPSEC_ULPROTO_ANY);
5781 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
5782 (struct sockaddr *)&saidx->dst, FULLMASK, IPSEC_ULPROTO_ANY);
5789 /* XXX proxy address (optional) */
5791 /* set sadb_x_policy */
5793 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
5801 /* XXX identity (optional) */
5803 if (idexttype && fqdn) {
5804 /* create identity extension (FQDN) */
5805 struct sadb_ident *id;
5808 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
5809 id = (struct sadb_ident *)p;
5810 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5811 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5812 id->sadb_ident_exttype = idexttype;
5813 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
5814 bcopy(fqdn, id + 1, fqdnlen);
5815 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
5819 /* create identity extension (USERFQDN) */
5820 struct sadb_ident *id;
5824 /* +1 for terminating-NUL */
5825 userfqdnlen = strlen(userfqdn) + 1;
5828 id = (struct sadb_ident *)p;
5829 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5830 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5831 id->sadb_ident_exttype = idexttype;
5832 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
5833 /* XXX is it correct? */
5834 if (curproc && curproc->p_cred)
5835 id->sadb_ident_id = curproc->p_cred->p_ruid;
5836 if (userfqdn && userfqdnlen)
5837 bcopy(userfqdn, id + 1, userfqdnlen);
5838 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
5842 /* XXX sensitivity (optional) */
5844 /* create proposal/combination extension */
5845 m = key_getprop(saidx);
5848 * spec conformant: always attach proposal/combination extension,
5849 * the problem is that we have no way to attach it for ipcomp,
5850 * due to the way sadb_comb is declared in RFC2367.
5859 * outside of spec; make proposal/combination extension optional.
5865 if ((result->m_flags & M_PKTHDR) == 0) {
5870 if (result->m_len < sizeof(struct sadb_msg)) {
5871 result = m_pullup(result, sizeof(struct sadb_msg));
5872 if (result == NULL) {
5878 result->m_pkthdr.len = 0;
5879 for (m = result; m; m = m->m_next)
5880 result->m_pkthdr.len += m->m_len;
5882 mtod(result, struct sadb_msg *)->sadb_msg_len =
5883 PFKEY_UNIT64(result->m_pkthdr.len);
5885 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
5893 #ifndef IPSEC_NONBLOCK_ACQUIRE
5894 static struct secacq *
5895 key_newacq(struct secasindex *saidx)
5897 struct secacq *newacq;
5901 KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
5902 if (newacq == NULL) {
5903 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
5906 bzero(newacq, sizeof(*newacq));
5909 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
5910 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
5912 newacq->created = tv.tv_sec;
5918 static struct secacq *
5919 key_getacq(struct secasindex *saidx)
5923 LIST_FOREACH(acq, &acqtree, chain) {
5924 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
5931 static struct secacq *
5932 key_getacqbyseq(u_int32_t seq)
5936 LIST_FOREACH(acq, &acqtree, chain) {
5937 if (acq->seq == seq)
5945 static struct secspacq *
5946 key_newspacq(struct secpolicyindex *spidx)
5948 struct secspacq *acq;
5952 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq));
5954 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
5957 bzero(acq, sizeof(*acq));
5960 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
5962 acq->created = tv.tv_sec;
5968 static struct secspacq *
5969 key_getspacq(struct secpolicyindex *spidx)
5971 struct secspacq *acq;
5973 LIST_FOREACH(acq, &spacqtree, chain) {
5974 if (key_cmpspidx_exactly(spidx, &acq->spidx))
5982 * SADB_ACQUIRE processing,
5983 * in first situation, is receiving
5985 * from the ikmpd, and clear sequence of its secasvar entry.
5987 * In second situation, is receiving
5988 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5989 * from a user land process, and return
5990 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5993 * m will always be freed.
5996 key_acquire2(struct socket *so, struct mbuf *m,
5997 const struct sadb_msghdr *mhp)
5999 struct sadb_address *src0, *dst0;
6000 struct secasindex saidx;
6001 struct secashead *sah;
6006 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6007 panic("key_acquire2: NULL pointer is passed.\n");
6010 * Error message from KMd.
6011 * We assume that if error was occured in IKEd, the length of PFKEY
6012 * message is equal to the size of sadb_msg structure.
6013 * We do not raise error even if error occured in this function.
6015 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
6016 #ifndef IPSEC_NONBLOCK_ACQUIRE
6020 /* check sequence number */
6021 if (mhp->msg->sadb_msg_seq == 0) {
6022 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
6027 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
6029 * the specified larval SA is already gone, or we got
6030 * a bogus sequence number. we can silently ignore it.
6036 /* reset acq counter in order to deletion by timehander. */
6038 acq->created = tv.tv_sec;
6046 * This message is from user land.
6049 /* map satype to proto */
6050 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6051 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
6052 return key_senderror(so, m, EINVAL);
6055 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6056 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6057 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
6059 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6060 return key_senderror(so, m, EINVAL);
6062 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6063 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
6064 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
6066 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6067 return key_senderror(so, m, EINVAL);
6070 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6071 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6073 /* XXX boundary check against sa_len */
6074 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6076 /* get a SA index */
6077 LIST_FOREACH(sah, &sahtree, chain) {
6078 if (sah->state == SADB_SASTATE_DEAD)
6080 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6084 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
6085 return key_senderror(so, m, EEXIST);
6088 error = key_acquire(&saidx, NULL);
6090 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
6091 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
6092 return key_senderror(so, m, error);
6095 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6099 * SADB_REGISTER processing.
6100 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6103 * from the ikmpd, and register a socket to send PF_KEY messages,
6107 * If socket is detached, must free from regnode.
6109 * m will always be freed.
6112 key_register(struct socket *so, struct mbuf *m,
6113 const struct sadb_msghdr *mhp)
6115 struct secreg *reg, *newreg = 0;
6118 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6119 panic("key_register: NULL pointer is passed.\n");
6121 /* check for invalid register message */
6122 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0]))
6123 return key_senderror(so, m, EINVAL);
6125 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6126 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6129 /* check whether existing or not */
6130 LIST_FOREACH(reg, ®tree[mhp->msg->sadb_msg_satype], chain) {
6131 if (reg->so == so) {
6132 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
6133 return key_senderror(so, m, EEXIST);
6137 /* create regnode */
6138 KMALLOC(newreg, struct secreg *, sizeof(*newreg));
6139 if (newreg == NULL) {
6140 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
6141 return key_senderror(so, m, ENOBUFS);
6143 bzero((caddr_t)newreg, sizeof(*newreg));
6146 ((struct keycb *)sotorawcb(so))->kp_registered++;
6148 /* add regnode to regtree. */
6149 LIST_INSERT_HEAD(®tree[mhp->msg->sadb_msg_satype], newreg, chain);
6154 struct sadb_msg *newmsg;
6155 struct sadb_supported *sup;
6156 u_int len, alen, elen;
6159 struct sadb_alg *alg;
6161 /* create new sadb_msg to reply. */
6163 for (i = 1; i <= SADB_AALG_MAX; i++) {
6164 if (ah_algorithm_lookup(i))
6165 alen += sizeof(struct sadb_alg);
6168 alen += sizeof(struct sadb_supported);
6171 for (i = 1; i <= SADB_EALG_MAX; i++) {
6172 if (esp_algorithm_lookup(i))
6173 elen += sizeof(struct sadb_alg);
6176 elen += sizeof(struct sadb_supported);
6179 len = sizeof(struct sadb_msg) + alen + elen;
6182 return key_senderror(so, m, ENOBUFS);
6184 MGETHDR(n, MB_DONTWAIT, MT_DATA);
6186 MCLGET(n, MB_DONTWAIT);
6187 if ((n->m_flags & M_EXT) == 0) {
6193 return key_senderror(so, m, ENOBUFS);
6195 n->m_pkthdr.len = n->m_len = len;
6199 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6200 newmsg = mtod(n, struct sadb_msg *);
6201 newmsg->sadb_msg_errno = 0;
6202 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6203 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6205 /* for authentication algorithm */
6207 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6208 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6209 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6210 off += PFKEY_ALIGN8(sizeof(*sup));
6212 for (i = 1; i <= SADB_AALG_MAX; i++) {
6213 const struct ah_algorithm *aalgo;
6215 aalgo = ah_algorithm_lookup(i);
6218 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6219 alg->sadb_alg_id = i;
6220 alg->sadb_alg_ivlen = 0;
6221 alg->sadb_alg_minbits = aalgo->keymin;
6222 alg->sadb_alg_maxbits = aalgo->keymax;
6223 off += PFKEY_ALIGN8(sizeof(*alg));
6228 /* for encryption algorithm */
6230 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6231 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6232 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6233 off += PFKEY_ALIGN8(sizeof(*sup));
6235 for (i = 1; i <= SADB_EALG_MAX; i++) {
6236 const struct esp_algorithm *ealgo;
6238 ealgo = esp_algorithm_lookup(i);
6241 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6242 alg->sadb_alg_id = i;
6243 if (ealgo && ealgo->ivlen) {
6245 * give NULL to get the value preferred by
6246 * algorithm XXX SADB_X_EXT_DERIV ?
6248 alg->sadb_alg_ivlen =
6249 (*ealgo->ivlen)(ealgo, NULL);
6251 alg->sadb_alg_ivlen = 0;
6252 alg->sadb_alg_minbits = ealgo->keymin;
6253 alg->sadb_alg_maxbits = ealgo->keymax;
6254 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6261 panic("length assumption failed in key_register");
6265 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6270 * free secreg entry registered.
6271 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6274 key_freereg(struct socket *so)
6281 panic("key_freereg: NULL pointer is passed.\n");
6284 * check whether existing or not.
6285 * check all type of SA, because there is a potential that
6286 * one socket is registered to multiple type of SA.
6288 lwkt_gettoken(&key_token);
6289 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6290 LIST_FOREACH(reg, ®tree[i], chain) {
6292 && __LIST_CHAINED(reg)) {
6293 LIST_REMOVE(reg, chain);
6299 lwkt_reltoken(&key_token);
6303 * SADB_EXPIRE processing
6305 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6307 * NOTE: We send only soft lifetime extension.
6310 * others : error number
6313 key_expire(struct secasvar *sav)
6316 struct mbuf *result = NULL, *m;
6319 struct sadb_lifetime *lt;
6323 panic("key_expire: NULL pointer is passed.\n");
6324 if (sav->sah == NULL)
6325 panic("key_expire: Why was SA index in SA NULL.\n");
6326 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
6327 panic("key_expire: invalid proto is passed.\n");
6329 /* set msg header */
6330 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6337 /* create SA extension */
6338 m = key_setsadbsa(sav);
6345 /* create SA extension */
6346 m = key_setsadbxsa2(sav->sah->saidx.mode,
6347 sav->replay ? sav->replay->count : 0,
6348 sav->sah->saidx.reqid);
6355 /* create lifetime extension (current and soft) */
6356 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6357 m = key_alloc_mbuf(len);
6358 if (!m || m->m_next) { /*XXX*/
6364 bzero(mtod(m, caddr_t), len);
6365 lt = mtod(m, struct sadb_lifetime *);
6366 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6367 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6368 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
6369 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
6370 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
6371 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
6372 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
6373 bcopy(sav->lft_s, lt, sizeof(*lt));
6376 /* set sadb_address for source */
6377 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6378 (struct sockaddr *)&sav->sah->saidx.src,
6379 FULLMASK, IPSEC_ULPROTO_ANY);
6386 /* set sadb_address for destination */
6387 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6388 (struct sockaddr *)&sav->sah->saidx.dst,
6389 FULLMASK, IPSEC_ULPROTO_ANY);
6396 if ((result->m_flags & M_PKTHDR) == 0) {
6401 if (result->m_len < sizeof(struct sadb_msg)) {
6402 result = m_pullup(result, sizeof(struct sadb_msg));
6403 if (result == NULL) {
6409 result->m_pkthdr.len = 0;
6410 for (m = result; m; m = m->m_next)
6411 result->m_pkthdr.len += m->m_len;
6413 mtod(result, struct sadb_msg *)->sadb_msg_len =
6414 PFKEY_UNIT64(result->m_pkthdr.len);
6416 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6425 * SADB_FLUSH processing
6428 * from the ikmpd, and free all entries in secastree.
6432 * NOTE: to do is only marking SADB_SASTATE_DEAD.
6434 * m will always be freed.
6437 key_flush(struct socket *so, struct mbuf *m,
6438 const struct sadb_msghdr *mhp)
6440 struct sadb_msg *newmsg;
6441 struct secashead *sah, *nextsah;
6442 struct secasvar *sav, *nextsav;
6448 if (so == NULL || mhp == NULL || mhp->msg == NULL)
6449 panic("key_flush: NULL pointer is passed.\n");
6451 /* map satype to proto */
6452 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6453 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
6454 return key_senderror(so, m, EINVAL);
6457 /* no SATYPE specified, i.e. flushing all SA. */
6458 for (sah = LIST_FIRST(&sahtree);
6461 nextsah = LIST_NEXT(sah, chain);
6463 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6464 && proto != sah->saidx.proto)
6468 stateidx < _ARRAYLEN(saorder_state_alive);
6470 state = saorder_state_any[stateidx];
6471 for (sav = LIST_FIRST(&sah->savtree[state]);
6475 nextsav = LIST_NEXT(sav, chain);
6477 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6482 sah->state = SADB_SASTATE_DEAD;
6485 if (m->m_len < sizeof(struct sadb_msg) ||
6486 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
6487 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
6488 return key_senderror(so, m, ENOBUFS);
6494 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
6495 newmsg = mtod(m, struct sadb_msg *);
6496 newmsg->sadb_msg_errno = 0;
6497 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
6499 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6503 * SADB_DUMP processing
6504 * dump all entries including status of DEAD in SAD.
6507 * from the ikmpd, and dump all secasvar leaves
6512 * m will always be freed.
6515 key_dump(struct socket *so, struct mbuf *m,
6516 const struct sadb_msghdr *mhp)
6518 struct secashead *sah;
6519 struct secasvar *sav;
6525 struct sadb_msg *newmsg;
6529 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6530 panic("key_dump: NULL pointer is passed.\n");
6532 /* map satype to proto */
6533 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6534 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
6535 return key_senderror(so, m, EINVAL);
6538 /* count sav entries to be sent to the userland. */
6540 LIST_FOREACH(sah, &sahtree, chain) {
6541 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6542 && proto != sah->saidx.proto)
6546 stateidx < _ARRAYLEN(saorder_state_any);
6548 state = saorder_state_any[stateidx];
6549 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6556 return key_senderror(so, m, ENOENT);
6558 /* send this to the userland, one at a time. */
6560 LIST_FOREACH(sah, &sahtree, chain) {
6561 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6562 && proto != sah->saidx.proto)
6565 /* map proto to satype */
6566 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
6567 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n"));
6568 return key_senderror(so, m, EINVAL);
6572 stateidx < _ARRAYLEN(saorder_state_any);
6574 state = saorder_state_any[stateidx];
6575 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6576 n = key_setdumpsa(sav, SADB_DUMP, satype,
6577 --cnt, mhp->msg->sadb_msg_pid);
6579 return key_senderror(so, m, ENOBUFS);
6581 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6591 * SADB_X_PROMISC processing
6593 * m will always be freed.
6596 key_promisc(struct socket *so, struct mbuf *m,
6597 const struct sadb_msghdr *mhp)
6602 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6603 panic("key_promisc: NULL pointer is passed.\n");
6605 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6607 if (olen < sizeof(struct sadb_msg)) {
6609 return key_senderror(so, m, EINVAL);
6614 } else if (olen == sizeof(struct sadb_msg)) {
6615 /* enable/disable promisc mode */
6618 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
6619 return key_senderror(so, m, EINVAL);
6620 mhp->msg->sadb_msg_errno = 0;
6621 switch (mhp->msg->sadb_msg_satype) {
6624 kp->kp_promisc = mhp->msg->sadb_msg_satype;
6627 return key_senderror(so, m, EINVAL);
6630 /* send the original message back to everyone */
6631 mhp->msg->sadb_msg_errno = 0;
6632 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6634 /* send packet as is */
6636 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
6638 /* TODO: if sadb_msg_seq is specified, send to specific pid */
6639 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6643 static int (*key_typesw[]) (struct socket *, struct mbuf *,
6644 const struct sadb_msghdr *) = {
6645 NULL, /* SADB_RESERVED */
6646 key_getspi, /* SADB_GETSPI */
6647 key_update, /* SADB_UPDATE */
6648 key_add, /* SADB_ADD */
6649 key_delete, /* SADB_DELETE */
6650 key_get, /* SADB_GET */
6651 key_acquire2, /* SADB_ACQUIRE */
6652 key_register, /* SADB_REGISTER */
6653 NULL, /* SADB_EXPIRE */
6654 key_flush, /* SADB_FLUSH */
6655 key_dump, /* SADB_DUMP */
6656 key_promisc, /* SADB_X_PROMISC */
6657 NULL, /* SADB_X_PCHANGE */
6658 key_spdadd, /* SADB_X_SPDUPDATE */
6659 key_spdadd, /* SADB_X_SPDADD */
6660 key_spddelete, /* SADB_X_SPDDELETE */
6661 key_spdget, /* SADB_X_SPDGET */
6662 NULL, /* SADB_X_SPDACQUIRE */
6663 key_spddump, /* SADB_X_SPDDUMP */
6664 key_spdflush, /* SADB_X_SPDFLUSH */
6665 key_spdadd, /* SADB_X_SPDSETIDX */
6666 NULL, /* SADB_X_SPDEXPIRE */
6667 key_spddelete2, /* SADB_X_SPDDELETE2 */
6671 * parse sadb_msg buffer to process PFKEYv2,
6672 * and create a data to response if needed.
6673 * I think to be dealed with mbuf directly.
6675 * msgp : pointer to pointer to a received buffer pulluped.
6676 * This is rewrited to response.
6677 * so : pointer to socket.
6679 * length for buffer to send to user process.
6682 key_parse(struct mbuf *m, struct socket *so)
6684 struct sadb_msg *msg;
6685 struct sadb_msghdr mh;
6691 if (m == NULL || so == NULL)
6692 panic("key_parse: NULL pointer is passed.\n");
6694 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
6695 KEYDEBUG(KEYDEBUG_KEY_DUMP,
6696 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
6700 if (m->m_len < sizeof(struct sadb_msg)) {
6701 m = m_pullup(m, sizeof(struct sadb_msg));
6705 msg = mtod(m, struct sadb_msg *);
6706 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
6707 target = KEY_SENDUP_ONE;
6709 if ((m->m_flags & M_PKTHDR) == 0 ||
6710 m->m_pkthdr.len != m->m_pkthdr.len) {
6711 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
6712 pfkeystat.out_invlen++;
6717 if (msg->sadb_msg_version != PF_KEY_V2) {
6718 ipseclog((LOG_DEBUG,
6719 "key_parse: PF_KEY version %u is mismatched.\n",
6720 msg->sadb_msg_version));
6721 pfkeystat.out_invver++;
6726 if (msg->sadb_msg_type > SADB_MAX) {
6727 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6728 msg->sadb_msg_type));
6729 pfkeystat.out_invmsgtype++;
6734 /* for old-fashioned code - should be nuked */
6735 if (m->m_pkthdr.len > MCLBYTES) {
6742 MGETHDR(n, MB_DONTWAIT, MT_DATA);
6743 if (n && m->m_pkthdr.len > MHLEN) {
6744 MCLGET(n, MB_DONTWAIT);
6745 if ((n->m_flags & M_EXT) == 0) {
6754 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
6755 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
6761 /* align the mbuf chain so that extensions are in contiguous region. */
6762 error = key_align(m, &mh);
6766 if (m->m_next) { /*XXX*/
6774 switch (msg->sadb_msg_satype) {
6775 case SADB_SATYPE_UNSPEC:
6776 switch (msg->sadb_msg_type) {
6784 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
6785 "when msg type=%u.\n", msg->sadb_msg_type));
6786 pfkeystat.out_invsatype++;
6791 case SADB_SATYPE_AH:
6792 case SADB_SATYPE_ESP:
6793 case SADB_X_SATYPE_IPCOMP:
6794 case SADB_X_SATYPE_TCPSIGNATURE:
6795 switch (msg->sadb_msg_type) {
6797 case SADB_X_SPDDELETE:
6799 case SADB_X_SPDDUMP:
6800 case SADB_X_SPDFLUSH:
6801 case SADB_X_SPDSETIDX:
6802 case SADB_X_SPDUPDATE:
6803 case SADB_X_SPDDELETE2:
6804 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
6805 msg->sadb_msg_type));
6806 pfkeystat.out_invsatype++;
6811 case SADB_SATYPE_RSVP:
6812 case SADB_SATYPE_OSPFV2:
6813 case SADB_SATYPE_RIPV2:
6814 case SADB_SATYPE_MIP:
6815 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
6816 msg->sadb_msg_satype));
6817 pfkeystat.out_invsatype++;
6820 case 1: /* XXX: What does it do? */
6821 if (msg->sadb_msg_type == SADB_X_PROMISC)
6825 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6826 msg->sadb_msg_satype));
6827 pfkeystat.out_invsatype++;
6832 /* check field of upper layer protocol and address family */
6833 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
6834 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
6835 struct sadb_address *src0, *dst0;
6838 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
6839 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
6841 /* check upper layer protocol */
6842 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
6843 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
6844 pfkeystat.out_invaddr++;
6850 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
6851 PFKEY_ADDR_SADDR(dst0)->sa_family) {
6852 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
6853 pfkeystat.out_invaddr++;
6857 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6858 PFKEY_ADDR_SADDR(dst0)->sa_len) {
6859 ipseclog((LOG_DEBUG,
6860 "key_parse: address struct size mismatched.\n"));
6861 pfkeystat.out_invaddr++;
6866 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6868 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6869 sizeof(struct sockaddr_in)) {
6870 pfkeystat.out_invaddr++;
6876 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6877 sizeof(struct sockaddr_in6)) {
6878 pfkeystat.out_invaddr++;
6884 ipseclog((LOG_DEBUG,
6885 "key_parse: unsupported address family.\n"));
6886 pfkeystat.out_invaddr++;
6887 error = EAFNOSUPPORT;
6891 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6893 plen = sizeof(struct in_addr) << 3;
6896 plen = sizeof(struct in6_addr) << 3;
6899 plen = 0; /*fool gcc*/
6903 /* check max prefix length */
6904 if (src0->sadb_address_prefixlen > plen ||
6905 dst0->sadb_address_prefixlen > plen) {
6906 ipseclog((LOG_DEBUG,
6907 "key_parse: illegal prefixlen.\n"));
6908 pfkeystat.out_invaddr++;
6914 * prefixlen == 0 is valid because there can be a case when
6915 * all addresses are matched.
6919 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
6920 key_typesw[msg->sadb_msg_type] == NULL) {
6921 pfkeystat.out_invmsgtype++;
6926 lwkt_gettoken(&key_token);
6927 error = (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
6928 lwkt_reltoken(&key_token);
6932 msg->sadb_msg_errno = error;
6933 lwkt_gettoken(&key_token);
6934 error = key_sendup_mbuf(so, m, target);
6935 lwkt_reltoken(&key_token);
6940 key_senderror(struct socket *so, struct mbuf *m, int code)
6942 struct sadb_msg *msg;
6944 if (m->m_len < sizeof(struct sadb_msg))
6945 panic("invalid mbuf passed to key_senderror");
6947 msg = mtod(m, struct sadb_msg *);
6948 msg->sadb_msg_errno = code;
6949 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
6953 * set the pointer to each header into message buffer.
6954 * m will be freed on error.
6955 * XXX larger-than-MCLBYTES extension?
6958 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
6961 struct sadb_ext *ext;
6967 if (m == NULL || mhp == NULL)
6968 panic("key_align: NULL pointer is passed.\n");
6969 if (m->m_len < sizeof(struct sadb_msg))
6970 panic("invalid mbuf passed to key_align");
6973 bzero(mhp, sizeof(*mhp));
6975 mhp->msg = mtod(m, struct sadb_msg *);
6976 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
6978 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6979 extlen = end; /*just in case extlen is not updated*/
6980 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
6981 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
6983 /* m is already freed */
6986 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
6989 switch (ext->sadb_ext_type) {
6991 case SADB_EXT_ADDRESS_SRC:
6992 case SADB_EXT_ADDRESS_DST:
6993 case SADB_EXT_ADDRESS_PROXY:
6994 case SADB_EXT_LIFETIME_CURRENT:
6995 case SADB_EXT_LIFETIME_HARD:
6996 case SADB_EXT_LIFETIME_SOFT:
6997 case SADB_EXT_KEY_AUTH:
6998 case SADB_EXT_KEY_ENCRYPT:
6999 case SADB_EXT_IDENTITY_SRC:
7000 case SADB_EXT_IDENTITY_DST:
7001 case SADB_EXT_SENSITIVITY:
7002 case SADB_EXT_PROPOSAL:
7003 case SADB_EXT_SUPPORTED_AUTH:
7004 case SADB_EXT_SUPPORTED_ENCRYPT:
7005 case SADB_EXT_SPIRANGE:
7006 case SADB_X_EXT_POLICY:
7007 case SADB_X_EXT_SA2:
7008 /* duplicate check */
7010 * XXX Are there duplication payloads of either
7011 * KEY_AUTH or KEY_ENCRYPT ?
7013 if (mhp->ext[ext->sadb_ext_type] != NULL) {
7014 ipseclog((LOG_DEBUG,
7015 "key_align: duplicate ext_type %u "
7016 "is passed.\n", ext->sadb_ext_type));
7018 pfkeystat.out_dupext++;
7023 ipseclog((LOG_DEBUG,
7024 "key_align: invalid ext_type %u is passed.\n",
7025 ext->sadb_ext_type));
7027 pfkeystat.out_invexttype++;
7031 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
7033 if (key_validate_ext(ext, extlen)) {
7035 pfkeystat.out_invlen++;
7039 n = m_pulldown(m, off, extlen, &toff);
7041 /* m is already freed */
7044 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7046 mhp->ext[ext->sadb_ext_type] = ext;
7047 mhp->extoff[ext->sadb_ext_type] = off;
7048 mhp->extlen[ext->sadb_ext_type] = extlen;
7053 pfkeystat.out_invlen++;
7061 key_validate_ext(const struct sadb_ext *ext, int len)
7063 const struct sockaddr *sa;
7064 enum { NONE, ADDR } checktype = NONE;
7066 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
7068 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
7071 /* if it does not match minimum/maximum length, bail */
7072 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
7073 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
7075 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
7077 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
7080 /* more checks based on sadb_ext_type XXX need more */
7081 switch (ext->sadb_ext_type) {
7082 case SADB_EXT_ADDRESS_SRC:
7083 case SADB_EXT_ADDRESS_DST:
7084 case SADB_EXT_ADDRESS_PROXY:
7085 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7088 case SADB_EXT_IDENTITY_SRC:
7089 case SADB_EXT_IDENTITY_DST:
7090 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7091 SADB_X_IDENTTYPE_ADDR) {
7092 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7102 switch (checktype) {
7106 sa = (const struct sockaddr *)((c_caddr_t)ext + baselen);
7107 if (len < baselen + sal)
7109 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7122 bzero((caddr_t)&key_cb, sizeof(key_cb));
7124 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7125 LIST_INIT(&sptree[i]);
7128 LIST_INIT(&sahtree);
7130 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7131 LIST_INIT(®tree[i]);
7134 #ifndef IPSEC_NONBLOCK_ACQUIRE
7135 LIST_INIT(&acqtree);
7137 LIST_INIT(&spacqtree);
7139 /* system default */
7141 ip4_def_policy.policy = IPSEC_POLICY_NONE;
7142 ip4_def_policy.refcnt++; /*never reclaim this*/
7145 ip6_def_policy.policy = IPSEC_POLICY_NONE;
7146 ip6_def_policy.refcnt++; /*never reclaim this*/
7149 #ifndef IPSEC_DEBUG2
7150 callout_init(&key_timehandler_ch);
7151 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
7152 #endif /*IPSEC_DEBUG2*/
7154 /* initialize key statistics */
7155 keystat.getspi_count = 1;
7157 kprintf("IPsec: Initialized Security Association Processing.\n");
7163 * XXX: maybe This function is called after INBOUND IPsec processing.
7165 * Special check for tunnel-mode packets.
7166 * We must make some checks for consistency between inner and outer IP header.
7168 * xxx more checks to be provided
7171 key_checktunnelsanity(struct secasvar *sav, u_int family,
7172 caddr_t src, caddr_t dst)
7175 if (sav->sah == NULL)
7176 panic("sav->sah == NULL at key_checktunnelsanity");
7178 /* XXX: check inner IP header */
7184 #define hostnamelen strlen(hostname)
7187 * Get FQDN for the host.
7188 * If the administrator configured hostname (by hostname(1)) without
7189 * domain name, returns nothing.
7196 static char fqdn[MAXHOSTNAMELEN + 1];
7201 /* check if it comes with domain name. */
7203 for (i = 0; i < hostnamelen; i++) {
7204 if (hostname[i] == '.')
7210 /* NOTE: hostname may not be NUL-terminated. */
7211 bzero(fqdn, sizeof(fqdn));
7212 bcopy(hostname, fqdn, hostnamelen);
7213 fqdn[hostnamelen] = '\0';
7218 * get username@FQDN for the host/user.
7221 key_getuserfqdn(void)
7224 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
7225 struct proc *p = curproc;
7228 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
7230 if (!(host = key_getfqdn()))
7233 /* NOTE: s_login may not be-NUL terminated. */
7234 bzero(userfqdn, sizeof(userfqdn));
7235 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME);
7236 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
7237 q = userfqdn + strlen(userfqdn);
7239 bcopy(host, q, strlen(host));
7247 /* record data transfer on SA, and update timestamps */
7249 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
7252 panic("key_sa_recordxfer called with sav == NULL");
7254 panic("key_sa_recordxfer called with m == NULL");
7259 * XXX Currently, there is a difference of bytes size
7260 * between inbound and outbound processing.
7262 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
7263 /* to check bytes lifetime is done in key_timehandler(). */
7266 * We use the number of packets as the unit of
7267 * sadb_lifetime_allocations. We increment the variable
7268 * whenever {esp,ah}_{in,out}put is called.
7270 sav->lft_c->sadb_lifetime_allocations++;
7271 /* XXX check for expires? */
7274 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
7275 * in seconds. HARD and SOFT lifetime are measured by the time
7276 * difference (again in seconds) from sadb_lifetime_usetime.
7280 * -----+-----+--------+---> t
7281 * <--------------> HARD
7287 sav->lft_c->sadb_lifetime_usetime = tv.tv_sec;
7288 /* XXX check for expires? */
7296 key_sa_routechange(struct sockaddr *dst)
7298 struct secashead *sah;
7301 lwkt_gettoken(&key_token);
7302 LIST_FOREACH(sah, &sahtree, chain) {
7303 ro = &sah->sa_route;
7304 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
7305 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
7310 lwkt_reltoken(&key_token);
7314 key_sa_chgstate(struct secasvar *sav, u_int8_t state)
7317 panic("key_sa_chgstate called with sav == NULL");
7319 if (sav->state == state)
7322 if (__LIST_CHAINED(sav))
7323 LIST_REMOVE(sav, chain);
7326 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7330 key_sa_stir_iv(struct secasvar *sav)
7333 panic("key_sa_stir_iv called with sav == NULL");
7334 key_randomfill(sav->iv, sav->ivlen);
7338 static struct mbuf *
7339 key_alloc_mbuf(int l)
7341 struct mbuf *m = NULL, *n;
7346 MGET(n, MB_DONTWAIT, MT_DATA);
7347 if (n && len > MLEN)
7348 MCLGET(n, MB_DONTWAIT);
7356 n->m_len = M_TRAILINGSPACE(n);
7357 /* use the bottom of mbuf, hoping we can prepend afterwards */
7358 if (n->m_len > len) {
7359 t = (n->m_len - len) & ~(sizeof(long) - 1);