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kernel - Fix races created by a comedy of circumstansces (3)
[dragonfly.git] / sys / netproto / key / key.c
blobc273dcc2a4e890546aa861d9868f5155c7a312f0
1 /* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */
2 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
3
4 /*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * This code is referd to RFC 2367
35 */
36
37 #include "opt_inet.h"
38 #include "opt_inet6.h"
39 #include "opt_ipsec.h"
40
41 #include <sys/types.h>
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/mbuf.h>
46 #include <sys/domain.h>
47 #include <sys/protosw.h>
48 #include <sys/malloc.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/sysctl.h>
52 #include <sys/errno.h>
53 #include <sys/proc.h>
54 #include <sys/queue.h>
55 #include <sys/syslog.h>
56 #include <sys/thread2.h>
57
58 #include <net/if.h>
59 #include <net/route.h>
60 #include <net/raw_cb.h>
61
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <netinet/in_var.h>
66
67 #ifdef INET6
68 #include <netinet/ip6.h>
69 #include <netinet6/in6_var.h>
70 #include <netinet6/ip6_var.h>
71 #endif /* INET6 */
72
73 #ifdef INET
74 #include <netinet/in_pcb.h>
75 #endif
76 #ifdef INET6
77 #include <netinet6/in6_pcb.h>
78 #endif /* INET6 */
79
80 #include <net/pfkeyv2.h>
81 #include "keydb.h"
82 #include "key.h"
83 #include "keysock.h"
84 #include "key_debug.h"
85
86 #include <netinet6/ipsec.h>
87 #ifdef INET6
88 #include <netinet6/ipsec6.h>
89 #endif
90 #include <netinet6/ah.h>
91 #ifdef INET6
92 #include <netinet6/ah6.h>
93 #endif
94 #ifdef IPSEC_ESP
95 #include <netinet6/esp.h>
96 #ifdef INET6
97 #include <netinet6/esp6.h>
98 #endif
99 #endif
100 #include <netinet6/ipcomp.h>
101 #ifdef INET6
102 #include <netinet6/ipcomp6.h>
103 #endif
104
105 #include <machine/stdarg.h>
106
107 /* randomness */
108 #include <sys/random.h>
109
110 #include <net/net_osdep.h>
111
112 #ifndef satosin
113 #define satosin(s) ((struct sockaddr_in *)s)
114 #endif
115
116 #define FULLMASK 0xff
117
118 /*
119 * Note on SA reference counting:
120 * - SAs that are not in DEAD state will have (total external reference + 1)
121 * following value in reference count field. they cannot be freed and are
122 * referenced from SA header.
123 * - SAs that are in DEAD state will have (total external reference)
124 * in reference count field. they are ready to be freed. reference from
125 * SA header will be removed in key_delsav(), when the reference count
126 * field hits 0 (= no external reference other than from SA header.
127 */
128
129 #ifndef IPSEC_DEBUG2
130 static struct callout key_timehandler_ch;
131 #endif
132 u_int32_t key_debug_level = 0;
133 static u_int key_spi_trycnt = 1000;
134 static u_int32_t key_spi_minval = 0x100;
135 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
136 static u_int32_t policy_id = 0;
137 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
138 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
139 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
140 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
141 static int key_preferred_oldsa = 1; /* preferred old sa rather than new sa.*/
142
143 static u_int32_t acq_seq = 0;
144 static int key_tick_init_random = 0;
145
146 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
147 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
148 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
149 /* registed list */
150 #ifndef IPSEC_NONBLOCK_ACQUIRE
151 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
152 #endif
153 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
154
155 struct lwkt_token key_token = LWKT_TOKEN_INITIALIZER(key_token);
156
157 struct key_cb key_cb;
158
159 /* search order for SAs */
160 static const u_int saorder_state_valid_prefer_old[] = {
161 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
162 };
163 static const u_int saorder_state_valid_prefer_new[] = {
164 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
165 };
166 static const u_int saorder_state_alive[] = {
167 /* except DEAD */
168 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
169 };
170 static const u_int saorder_state_any[] = {
171 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
172 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
173 };
174
175 static const int minsize[] = {
176 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
177 sizeof(struct sadb_sa), /* SADB_EXT_SA */
178 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
180 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
181 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
182 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
183 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
184 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
185 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
186 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
187 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
188 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
189 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
190 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
191 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
192 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
193 0, /* SADB_X_EXT_KMPRIVATE */
194 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
195 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
196 };
197 static const int maxsize[] = {
198 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
199 sizeof(struct sadb_sa), /* SADB_EXT_SA */
200 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
202 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
203 0, /* SADB_EXT_ADDRESS_SRC */
204 0, /* SADB_EXT_ADDRESS_DST */
205 0, /* SADB_EXT_ADDRESS_PROXY */
206 0, /* SADB_EXT_KEY_AUTH */
207 0, /* SADB_EXT_KEY_ENCRYPT */
208 0, /* SADB_EXT_IDENTITY_SRC */
209 0, /* SADB_EXT_IDENTITY_DST */
210 0, /* SADB_EXT_SENSITIVITY */
211 0, /* SADB_EXT_PROPOSAL */
212 0, /* SADB_EXT_SUPPORTED_AUTH */
213 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
214 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
215 0, /* SADB_X_EXT_KMPRIVATE */
216 0, /* SADB_X_EXT_POLICY */
217 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
218 };
219
220 static int ipsec_esp_keymin = 256;
221 static int ipsec_esp_auth = 0;
222 static int ipsec_ah_keymin = 128;
223
224 #ifdef SYSCTL_DECL
225 SYSCTL_DECL(_net_key);
226 #endif
227
228 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
229 &key_debug_level, 0, "");
230
231 /* max count of trial for the decision of spi value */
232 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
233 &key_spi_trycnt, 0, "");
234
235 /* minimum spi value to allocate automatically. */
236 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
237 &key_spi_minval, 0, "");
238
239 /* maximun spi value to allocate automatically. */
240 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
241 &key_spi_maxval, 0, "");
242
243 /* interval to initialize randseed */
244 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
245 &key_int_random, 0, "");
246
247 /* lifetime for larval SA */
248 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
249 &key_larval_lifetime, 0, "");
250
251 /* counter for blocking to send SADB_ACQUIRE to IKEd */
252 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
253 &key_blockacq_count, 0, "");
254
255 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
256 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
257 &key_blockacq_lifetime, 0, "");
258
259 /* ESP auth */
260 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
261 &ipsec_esp_auth, 0, "");
262
263 /* minimum ESP key length */
264 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
265 &ipsec_esp_keymin, 0, "");
266
267 /* minimum AH key length */
268 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
269 &ipsec_ah_keymin, 0, "");
270
271 /* perfered old SA rather than new SA */
272 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
273 &key_preferred_oldsa, 0, "");
274
275 #ifndef LIST_FOREACH
276 #define LIST_FOREACH(elm, head, field) \
277 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
278 #endif
279 #define __LIST_CHAINED(elm) \
280 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
281 #define LIST_INSERT_TAIL(head, elm, type, field) \
282 do {\
283 struct type *curelm = LIST_FIRST(head); \
284 if (curelm == NULL) {\
285 LIST_INSERT_HEAD(head, elm, field); \
286 } else { \
287 while (LIST_NEXT(curelm, field)) \
288 curelm = LIST_NEXT(curelm, field);\
289 LIST_INSERT_AFTER(curelm, elm, field);\
290 }\
291 } while (0)
292
293 #define KEY_CHKSASTATE(head, sav, name) \
294 do { \
295 if ((head) != (sav)) { \
296 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
297 (name), (head), (sav))); \
298 continue; \
299 } \
300 } while (0)
301
302 #define KEY_CHKSPDIR(head, sp, name) \
303 do { \
304 if ((head) != (sp)) { \
305 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
306 "anyway continue.\n", \
307 (name), (head), (sp))); \
308 } \
309 } while (0)
310
311 #if 1
312 #define KMALLOC(p, t, n) \
313 ((p) = (t) kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK))
314 #define KFREE(p) \
315 kfree((caddr_t)(p), M_SECA);
316 #else
317 #define KMALLOC(p, t, n) \
318 do { \
319 ((p) = (t)kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK)); \
320 kprintf("%s %d: %p <- KMALLOC(%s, %d)\n", \
321 __FILE__, __LINE__, (p), #t, n); \
322 } while (0)
323
324 #define KFREE(p) \
325 do { \
326 kprintf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
327 kfree((caddr_t)(p), M_SECA); \
328 } while (0)
329 #endif
330
331 /*
332 * set parameters into secpolicyindex buffer.
333 * Must allocate secpolicyindex buffer passed to this function.
334 */
335 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
336 do { \
337 bzero((idx), sizeof(struct secpolicyindex)); \
338 (idx)->dir = (_dir); \
339 (idx)->prefs = (ps); \
340 (idx)->prefd = (pd); \
341 (idx)->ul_proto = (ulp); \
342 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
343 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
344 } while (0)
345
346 /*
347 * set parameters into secasindex buffer.
348 * Must allocate secasindex buffer before calling this function.
349 */
350 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
351 do { \
352 bzero((idx), sizeof(struct secasindex)); \
353 (idx)->proto = (p); \
354 (idx)->mode = (m); \
355 (idx)->reqid = (r); \
356 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
357 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
358 } while (0)
359
360 /* key statistics */
361 struct _keystat {
362 u_long getspi_count; /* the avarage of count to try to get new SPI */
363 } keystat;
364
365 struct sadb_msghdr {
366 struct sadb_msg *msg;
367 struct sadb_ext *ext[SADB_EXT_MAX + 1];
368 int extoff[SADB_EXT_MAX + 1];
369 int extlen[SADB_EXT_MAX + 1];
370 };
371
372 static struct secasvar *key_allocsa_policy (struct secasindex *);
373 static void key_freesp_so (struct secpolicy **);
374 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
375 static void key_delsp (struct secpolicy *);
376 static struct secpolicy *key_getsp (struct secpolicyindex *);
377 static struct secpolicy *key_getspbyid (u_int32_t);
378 static u_int32_t key_newreqid (void);
379 static struct mbuf *key_gather_mbuf (struct mbuf *,
380 const struct sadb_msghdr *, int, int, ...);
381 static int key_spdadd (struct socket *, struct mbuf *,
382 const struct sadb_msghdr *);
383 static u_int32_t key_getnewspid (void);
384 static int key_spddelete (struct socket *, struct mbuf *,
385 const struct sadb_msghdr *);
386 static int key_spddelete2 (struct socket *, struct mbuf *,
387 const struct sadb_msghdr *);
388 static int key_spdget (struct socket *, struct mbuf *,
389 const struct sadb_msghdr *);
390 static int key_spdflush (struct socket *, struct mbuf *,
391 const struct sadb_msghdr *);
392 static int key_spddump (struct socket *, struct mbuf *,
393 const struct sadb_msghdr *);
394 static struct mbuf *key_setdumpsp (struct secpolicy *,
395 u_int8_t, u_int32_t, u_int32_t);
396 static u_int key_getspreqmsglen (struct secpolicy *);
397 static int key_spdexpire (struct secpolicy *);
398 static struct secashead *key_newsah (struct secasindex *);
399 static void key_delsah (struct secashead *);
400 static struct secasvar *key_newsav (struct mbuf *,
401 const struct sadb_msghdr *, struct secashead *, int *);
402 static void key_delsav (struct secasvar *);
403 static struct secashead *key_getsah (struct secasindex *);
404 static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
405 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
406 static int key_setsaval (struct secasvar *, struct mbuf *,
407 const struct sadb_msghdr *);
408 static int key_mature (struct secasvar *);
409 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
410 u_int8_t, u_int32_t, u_int32_t);
411 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
412 u_int32_t, pid_t, u_int16_t);
413 static struct mbuf *key_setsadbsa (struct secasvar *);
414 static struct mbuf *key_setsadbaddr (u_int16_t,
415 struct sockaddr *, u_int8_t, u_int16_t);
416 #if 0
417 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, caddr_t,
418 int, u_int64_t);
419 #endif
420 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int32_t);
421 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
422 u_int32_t);
423 static void *key_newbuf (const void *, u_int);
424 #ifdef INET6
425 static int key_ismyaddr6 (struct sockaddr_in6 *);
426 #endif
427
428 /* flags for key_cmpsaidx() */
429 #define CMP_HEAD 1 /* protocol, addresses. */
430 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
431 #define CMP_REQID 3 /* additionally HEAD, reaid. */
432 #define CMP_EXACTLY 4 /* all elements. */
433 static int key_cmpsaidx
434 (struct secasindex *, struct secasindex *, int);
435
436 static int key_cmpspidx_exactly
437 (struct secpolicyindex *, struct secpolicyindex *);
438 static int key_cmpspidx_withmask
439 (struct secpolicyindex *, struct secpolicyindex *);
440 static int key_sockaddrcmp (struct sockaddr *, struct sockaddr *, int);
441 static int key_bbcmp (caddr_t, caddr_t, u_int);
442 static void key_srandom (void);
443 static u_int16_t key_satype2proto (u_int8_t);
444 static u_int8_t key_proto2satype (u_int16_t);
445
446 static int key_getspi (struct socket *, struct mbuf *,
447 const struct sadb_msghdr *);
448 static u_int32_t key_do_getnewspi (struct sadb_spirange *,
449 struct secasindex *);
450 static int key_update (struct socket *, struct mbuf *,
451 const struct sadb_msghdr *);
452 #ifdef IPSEC_DOSEQCHECK
453 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
454 #endif
455 static int key_add (struct socket *, struct mbuf *,
456 const struct sadb_msghdr *);
457 static int key_setident (struct secashead *, struct mbuf *,
458 const struct sadb_msghdr *);
459 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
460 const struct sadb_msghdr *);
461 static int key_delete (struct socket *, struct mbuf *,
462 const struct sadb_msghdr *);
463 static int key_get (struct socket *, struct mbuf *,
464 const struct sadb_msghdr *);
465
466 static void key_getcomb_setlifetime (struct sadb_comb *);
467 #ifdef IPSEC_ESP
468 static struct mbuf *key_getcomb_esp (void);
469 #endif
470 static struct mbuf *key_getcomb_ah (void);
471 static struct mbuf *key_getcomb_ipcomp (void);
472 static struct mbuf *key_getprop (const struct secasindex *);
473
474 static int key_acquire (struct secasindex *, struct secpolicy *);
475 #ifndef IPSEC_NONBLOCK_ACQUIRE
476 static struct secacq *key_newacq (struct secasindex *);
477 static struct secacq *key_getacq (struct secasindex *);
478 static struct secacq *key_getacqbyseq (u_int32_t);
479 #endif
480 static struct secspacq *key_newspacq (struct secpolicyindex *);
481 static struct secspacq *key_getspacq (struct secpolicyindex *);
482 static int key_acquire2 (struct socket *, struct mbuf *,
483 const struct sadb_msghdr *);
484 static int key_register (struct socket *, struct mbuf *,
485 const struct sadb_msghdr *);
486 static int key_expire (struct secasvar *);
487 static int key_flush (struct socket *, struct mbuf *,
488 const struct sadb_msghdr *);
489 static int key_dump (struct socket *, struct mbuf *,
490 const struct sadb_msghdr *);
491 static int key_promisc (struct socket *, struct mbuf *,
492 const struct sadb_msghdr *);
493 static int key_senderror (struct socket *, struct mbuf *, int);
494 static int key_validate_ext (const struct sadb_ext *, int);
495 static int key_align (struct mbuf *, struct sadb_msghdr *);
496 #if 0
497 static const char *key_getfqdn (void);
498 static const char *key_getuserfqdn (void);
499 #endif
500 static void key_sa_chgstate (struct secasvar *, u_int8_t);
501 static struct mbuf *key_alloc_mbuf (int);
502
503 /* %%% IPsec policy management */
504 /*
505 * allocating a SP for OUTBOUND or INBOUND packet.
506 * Must call key_freesp() later.
507 * OUT: NULL: not found
508 * others: found and return the pointer.
509 */
510 struct secpolicy *
511 key_allocsp(struct secpolicyindex *spidx, u_int dir)
512 {
513 struct secpolicy *sp;
514 struct timeval tv;
515
516 /* sanity check */
517 if (spidx == NULL)
518 panic("key_allocsp: NULL pointer is passed.");
519
520 /* check direction */
521 switch (dir) {
522 case IPSEC_DIR_INBOUND:
523 case IPSEC_DIR_OUTBOUND:
524 break;
525 default:
526 panic("key_allocsp: Invalid direction is passed.");
527 }
528
529 /* get a SP entry */
530 lwkt_gettoken(&key_token);
531 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
532 kprintf("*** objects\n");
533 kdebug_secpolicyindex(spidx));
534
535 LIST_FOREACH(sp, &sptree[dir], chain) {
536 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
537 kprintf("*** in SPD\n");
538 kdebug_secpolicyindex(&sp->spidx));
539
540 if (sp->state == IPSEC_SPSTATE_DEAD)
541 continue;
542 if (key_cmpspidx_withmask(&sp->spidx, spidx))
543 goto found;
544 }
545
546 lwkt_reltoken(&key_token);
547 return NULL;
548
549 found:
550 /* sanity check */
551 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
552
553 /* found a SPD entry */
554 sp->refcnt++;
555 microtime(&tv);
556 sp->lastused = tv.tv_sec;
557 lwkt_reltoken(&key_token);
558 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
559 kprintf("DP key_allocsp cause refcnt++:%d SP:%p\n",
560 sp->refcnt, sp));
561
562 return sp;
563 }
564
565 /*
566 * return a policy that matches this particular inbound packet.
567 * XXX slow
568 */
569 struct secpolicy *
570 key_gettunnel(struct sockaddr *osrc, struct sockaddr *odst,
571 struct sockaddr *isrc, struct sockaddr *idst)
572 {
573 struct secpolicy *sp;
574 const int dir = IPSEC_DIR_INBOUND;
575 struct timeval tv;
576 struct ipsecrequest *r1, *r2, *p;
577 struct sockaddr *os, *od, *is, *id;
578 struct secpolicyindex spidx;
579
580 if (isrc->sa_family != idst->sa_family) {
581 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
582 isrc->sa_family, idst->sa_family));
583 return NULL;
584 }
585
586 lwkt_gettoken(&key_token);
587 LIST_FOREACH(sp, &sptree[dir], chain) {
588 if (sp->state == IPSEC_SPSTATE_DEAD)
589 continue;
590
591 r1 = r2 = NULL;
592 for (p = sp->req; p; p = p->next) {
593 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
594 continue;
595
596 r1 = r2;
597 r2 = p;
598
599 if (!r1) {
600 /* here we look at address matches only */
601 spidx = sp->spidx;
602 if (isrc->sa_len > sizeof(spidx.src) ||
603 idst->sa_len > sizeof(spidx.dst))
604 continue;
605 bcopy(isrc, &spidx.src, isrc->sa_len);
606 bcopy(idst, &spidx.dst, idst->sa_len);
607 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
608 continue;
609 } else {
610 is = (struct sockaddr *)&r1->saidx.src;
611 id = (struct sockaddr *)&r1->saidx.dst;
612 if (key_sockaddrcmp(is, isrc, 0) ||
613 key_sockaddrcmp(id, idst, 0))
614 continue;
615 }
616
617 os = (struct sockaddr *)&r2->saidx.src;
618 od = (struct sockaddr *)&r2->saidx.dst;
619 if (key_sockaddrcmp(os, osrc, 0) ||
620 key_sockaddrcmp(od, odst, 0))
621 continue;
622
623 goto found;
624 }
625 }
626 lwkt_reltoken(&key_token);
627 return NULL;
628
629 found:
630 sp->refcnt++;
631 microtime(&tv);
632 sp->lastused = tv.tv_sec;
633 lwkt_reltoken(&key_token);
634 return sp;
635 }
636
637 /*
638 * allocating an SA entry for an *OUTBOUND* packet.
639 * checking each request entries in SP, and acquire an SA if need.
640 * OUT: 0: there are valid requests.
641 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
642 */
643 int
644 key_checkrequest(struct ipsecrequest *isr, struct secasindex *saidx)
645 {
646 u_int level;
647 int error;
648
649 /* sanity check */
650 if (isr == NULL || saidx == NULL)
651 panic("key_checkrequest: NULL pointer is passed.");
652
653 /* check mode */
654 switch (saidx->mode) {
655 case IPSEC_MODE_TRANSPORT:
656 case IPSEC_MODE_TUNNEL:
657 break;
658 case IPSEC_MODE_ANY:
659 default:
660 panic("key_checkrequest: Invalid policy defined.");
661 }
662
663 lwkt_gettoken(&key_token);
664
665 /* get current level */
666 level = ipsec_get_reqlevel(isr);
667
668 #if 0
669 /*
670 * We do allocate new SA only if the state of SA in the holder is
671 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
672 */
673 if (isr->sav != NULL) {
674 if (isr->sav->sah == NULL)
675 panic("key_checkrequest: sah is null.");
676 if (isr->sav == (struct secasvar *)LIST_FIRST(
677 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
678 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
679 kprintf("DP checkrequest calls free SA:%p\n",
680 isr->sav));
681 key_freesav(isr->sav);
682 isr->sav = NULL;
683 }
684 }
685 #else
686 /*
687 * we free any SA stashed in the IPsec request because a different
688 * SA may be involved each time this request is checked, either
689 * because new SAs are being configured, or this request is
690 * associated with an unconnected datagram socket, or this request
691 * is associated with a system default policy.
692 *
693 * The operation may have negative impact to performance. We may
694 * want to check cached SA carefully, rather than picking new SA
695 * every time.
696 */
697 if (isr->sav != NULL) {
698 key_freesav(isr->sav);
699 isr->sav = NULL;
700 }
701 #endif
702
703 /*
704 * new SA allocation if no SA found.
705 * key_allocsa_policy should allocate the oldest SA available.
706 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
707 */
708 if (isr->sav == NULL)
709 isr->sav = key_allocsa_policy(saidx);
710
711 /* When there is SA. */
712 if (isr->sav != NULL) {
713 lwkt_reltoken(&key_token);
714 return 0;
715 }
716
717 /* there is no SA */
718 if ((error = key_acquire(saidx, isr->sp)) != 0) {
719 /* XXX What should I do ? */
720 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
721 "from key_acquire.\n", error));
722 lwkt_reltoken(&key_token);
723 return error;
724 }
725
726 lwkt_reltoken(&key_token);
727 return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
728 }
729
730 /*
731 * allocating a SA for policy entry from SAD.
732 * NOTE: searching SAD of aliving state.
733 * OUT: NULL: not found.
734 * others: found and return the pointer.
735 */
736 static struct secasvar *
737 key_allocsa_policy(struct secasindex *saidx)
738 {
739 struct secashead *sah;
740 struct secasvar *sav;
741 u_int stateidx, state;
742 const u_int *saorder_state_valid;
743 int arraysize;
744
745 LIST_FOREACH(sah, &sahtree, chain) {
746 if (sah->state == SADB_SASTATE_DEAD)
747 continue;
748 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
749 goto found;
750 }
751
752 return NULL;
753
754 found:
755
756 /*
757 * search a valid state list for outbound packet.
758 * This search order is important.
759 */
760 if (key_preferred_oldsa) {
761 saorder_state_valid = saorder_state_valid_prefer_old;
762 arraysize = NELEM(saorder_state_valid_prefer_old);
763 } else {
764 saorder_state_valid = saorder_state_valid_prefer_new;
765 arraysize = NELEM(saorder_state_valid_prefer_new);
766 }
767
768 for (stateidx = 0; stateidx < arraysize; stateidx++) {
769
770 state = saorder_state_valid[stateidx];
771
772 sav = key_do_allocsa_policy(sah, state);
773 if (sav != NULL)
774 return sav;
775 }
776
777 return NULL;
778 }
779
780 /*
781 * searching SAD with direction, protocol, mode and state.
782 * called by key_allocsa_policy().
783 * OUT:
784 * NULL : not found
785 * others : found, pointer to a SA.
786 */
787 static struct secasvar *
788 key_do_allocsa_policy(struct secashead *sah, u_int state)
789 {
790 struct secasvar *sav, *nextsav, *candidate, *d;
791
792 /* initilize */
793 candidate = NULL;
794
795 for (sav = LIST_FIRST(&sah->savtree[state]);
796 sav != NULL;
797 sav = nextsav) {
798
799 nextsav = LIST_NEXT(sav, chain);
800
801 /* sanity check */
802 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
803
804 /* initialize */
805 if (candidate == NULL) {
806 candidate = sav;
807 continue;
808 }
809
810 /* Which SA is the better ? */
811
812 /* sanity check 2 */
813 if (candidate->lft_c == NULL || sav->lft_c == NULL)
814 panic("key_do_allocsa_policy: "
815 "lifetime_current is NULL.\n");
816
817 /* What the best method is to compare ? */
818 if (key_preferred_oldsa) {
819 if (candidate->lft_c->sadb_lifetime_addtime >
820 sav->lft_c->sadb_lifetime_addtime) {
821 candidate = sav;
822 }
823 continue;
824 /*NOTREACHED*/
825 }
826
827 /* prefered new sa rather than old sa */
828 if (candidate->lft_c->sadb_lifetime_addtime <
829 sav->lft_c->sadb_lifetime_addtime) {
830 d = candidate;
831 candidate = sav;
832 } else
833 d = sav;
834
835 /*
836 * prepared to delete the SA when there is more
837 * suitable candidate and the lifetime of the SA is not
838 * permanent.
839 */
840 if (d->lft_c->sadb_lifetime_addtime != 0) {
841 struct mbuf *m, *result;
842
843 key_sa_chgstate(d, SADB_SASTATE_DEAD);
844
845 m = key_setsadbmsg(SADB_DELETE, 0,
846 d->sah->saidx.proto, 0, 0, d->refcnt - 1);
847 if (!m)
848 goto msgfail;
849 result = m;
850
851 /* set sadb_address for saidx's. */
852 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
853 (struct sockaddr *)&d->sah->saidx.src,
854 d->sah->saidx.src.ss_len << 3,
855 IPSEC_ULPROTO_ANY);
856 if (!m)
857 goto msgfail;
858 m_cat(result, m);
859
860 /* set sadb_address for saidx's. */
861 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
862 (struct sockaddr *)&d->sah->saidx.src,
863 d->sah->saidx.src.ss_len << 3,
864 IPSEC_ULPROTO_ANY);
865 if (!m)
866 goto msgfail;
867 m_cat(result, m);
868
869 /* create SA extension */
870 m = key_setsadbsa(d);
871 if (!m)
872 goto msgfail;
873 m_cat(result, m);
874
875 if (result->m_len < sizeof(struct sadb_msg)) {
876 result = m_pullup(result,
877 sizeof(struct sadb_msg));
878 if (result == NULL)
879 goto msgfail;
880 }
881
882 result->m_pkthdr.len = 0;
883 for (m = result; m; m = m->m_next)
884 result->m_pkthdr.len += m->m_len;
885 mtod(result, struct sadb_msg *)->sadb_msg_len =
886 PFKEY_UNIT64(result->m_pkthdr.len);
887
888 if (key_sendup_mbuf(NULL, result,
889 KEY_SENDUP_REGISTERED))
890 goto msgfail;
891 msgfail:
892 key_freesav(d);
893 }
894 }
895
896 if (candidate) {
897 candidate->refcnt++;
898 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
899 kprintf("DP allocsa_policy cause "
900 "refcnt++:%d SA:%p\n",
901 candidate->refcnt, candidate));
902 }
903 return candidate;
904 }
905
906 /*
907 * allocating a SA entry for a *INBOUND* packet.
908 * Must call key_freesav() later.
909 * OUT: positive: pointer to a sav.
910 * NULL: not found, or error occured.
911 *
912 * In the comparison, source address will be ignored for RFC2401 conformance.
913 * To quote, from section 4.1:
914 * A security association is uniquely identified by a triple consisting
915 * of a Security Parameter Index (SPI), an IP Destination Address, and a
916 * security protocol (AH or ESP) identifier.
917 * Note that, however, we do need to keep source address in IPsec SA.
918 * IKE specification and PF_KEY specification do assume that we
919 * keep source address in IPsec SA. We see a tricky situation here.
920 */
921 struct secasvar *
922 key_allocsa(u_int family, caddr_t src, caddr_t dst, u_int proto,
923 u_int32_t spi)
924 {
925 struct secashead *sah;
926 struct secasvar *sav;
927 u_int stateidx, state;
928 struct sockaddr_in sin;
929 struct sockaddr_in6 sin6;
930 const u_int *saorder_state_valid;
931 int arraysize;
932
933 /* sanity check */
934 if (src == NULL || dst == NULL)
935 panic("key_allocsa: NULL pointer is passed.");
936
937 /*
938 * when both systems employ similar strategy to use a SA.
939 * the search order is important even in the inbound case.
940 */
941 if (key_preferred_oldsa) {
942 saorder_state_valid = saorder_state_valid_prefer_old;
943 arraysize = NELEM(saorder_state_valid_prefer_old);
944 } else {
945 saorder_state_valid = saorder_state_valid_prefer_new;
946 arraysize = NELEM(saorder_state_valid_prefer_new);
947 }
948
949 /*
950 * searching SAD.
951 * XXX: to be checked internal IP header somewhere. Also when
952 * IPsec tunnel packet is received. But ESP tunnel mode is
953 * encrypted so we can't check internal IP header.
954 */
955 lwkt_gettoken(&key_token);
956 LIST_FOREACH(sah, &sahtree, chain) {
957 /*
958 * search a valid state list for inbound packet.
959 * the search order is not important.
960 */
961 for (stateidx = 0; stateidx < arraysize; stateidx++) {
962 state = saorder_state_valid[stateidx];
963 LIST_FOREACH(sav, &sah->savtree[state], chain) {
964 /* sanity check */
965 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
966 if (proto != sav->sah->saidx.proto)
967 continue;
968 if (spi != sav->spi)
969 continue;
970 if (family != sav->sah->saidx.src.ss_family ||
971 family != sav->sah->saidx.dst.ss_family)
972 continue;
973
974 #if 0 /* don't check src */
975 /* check src address */
976 switch (family) {
977 case AF_INET:
978 bzero(&sin, sizeof(sin));
979 sin.sin_family = AF_INET;
980 sin.sin_len = sizeof(sin);
981 bcopy(src, &sin.sin_addr,
982 sizeof(sin.sin_addr));
983 if (key_sockaddrcmp((struct sockaddr*)&sin,
984 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
985 continue;
986
987 break;
988 case AF_INET6:
989 bzero(&sin6, sizeof(sin6));
990 sin6.sin6_family = AF_INET6;
991 sin6.sin6_len = sizeof(sin6);
992 bcopy(src, &sin6.sin6_addr,
993 sizeof(sin6.sin6_addr));
994 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
995 /* kame fake scopeid */
996 sin6.sin6_scope_id =
997 ntohs(sin6.sin6_addr.s6_addr16[1]);
998 sin6.sin6_addr.s6_addr16[1] = 0;
999 }
1000 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1001 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
1002 continue;
1003 break;
1004 default:
1005 ipseclog((LOG_DEBUG, "key_allocsa: "
1006 "unknown address family=%d.\n",
1007 family));
1008 continue;
1009 }
1010
1011 #endif
1012 /* check dst address */
1013 switch (family) {
1014 case AF_INET:
1015 bzero(&sin, sizeof(sin));
1016 sin.sin_family = AF_INET;
1017 sin.sin_len = sizeof(sin);
1018 bcopy(dst, &sin.sin_addr,
1019 sizeof(sin.sin_addr));
1020 if (key_sockaddrcmp((struct sockaddr*)&sin,
1021 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1022 continue;
1023
1024 break;
1025 case AF_INET6:
1026 bzero(&sin6, sizeof(sin6));
1027 sin6.sin6_family = AF_INET6;
1028 sin6.sin6_len = sizeof(sin6);
1029 bcopy(dst, &sin6.sin6_addr,
1030 sizeof(sin6.sin6_addr));
1031 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1032 /* kame fake scopeid */
1033 sin6.sin6_scope_id =
1034 ntohs(sin6.sin6_addr.s6_addr16[1]);
1035 sin6.sin6_addr.s6_addr16[1] = 0;
1036 }
1037 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1038 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1039 continue;
1040 break;
1041 default:
1042 ipseclog((LOG_DEBUG, "key_allocsa: "
1043 "unknown address family=%d.\n",
1044 family));
1045 continue;
1046 }
1047
1048 goto found;
1049 }
1050 }
1051 }
1052
1053 /* not found */
1054 lwkt_reltoken(&key_token);
1055 return NULL;
1056
1057 found:
1058 sav->refcnt++;
1059 lwkt_reltoken(&key_token);
1060 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1061 kprintf("DP allocsa cause refcnt++:%d SA:%p\n",
1062 sav->refcnt, sav));
1063 return sav;
1064 }
1065
1066 /*
1067 * Must be called after calling key_allocsp().
1068 * For both the packet without socket and key_freeso().
1069 */
1070 void
1071 key_freesp(struct secpolicy *sp)
1072 {
1073 /* sanity check */
1074 if (sp == NULL)
1075 panic("key_freesp: NULL pointer is passed.");
1076
1077 lwkt_gettoken(&key_token);
1078 sp->refcnt--;
1079 if (sp->refcnt == 0)
1080 key_delsp(sp);
1081 lwkt_reltoken(&key_token);
1082 }
1083
1084 /*
1085 * Must be called after calling key_allocsp().
1086 * For the packet with socket.
1087 */
1088 void
1089 key_freeso(struct socket *so)
1090 {
1091 /* sanity check */
1092 if (so == NULL)
1093 panic("key_freeso: NULL pointer is passed.");
1094
1095 lwkt_gettoken(&key_token);
1096 switch (so->so_proto->pr_domain->dom_family) {
1097 #ifdef INET
1098 case PF_INET:
1099 {
1100 struct inpcb *pcb = so->so_pcb;
1101
1102 /* Does it have a PCB ? */
1103 if (pcb == NULL)
1104 break;
1105 key_freesp_so(&pcb->inp_sp->sp_in);
1106 key_freesp_so(&pcb->inp_sp->sp_out);
1107 }
1108 break;
1109 #endif
1110 #ifdef INET6
1111 case PF_INET6:
1112 {
1113 #ifdef HAVE_NRL_INPCB
1114 struct inpcb *pcb = so->so_pcb;
1115
1116 /* Does it have a PCB ? */
1117 if (pcb == NULL)
1118 break;
1119 key_freesp_so(&pcb->inp_sp->sp_in);
1120 key_freesp_so(&pcb->inp_sp->sp_out);
1121 #else
1122 struct in6pcb *pcb = so->so_pcb;
1123
1124 /* Does it have a PCB ? */
1125 if (pcb == NULL)
1126 break;
1127 key_freesp_so(&pcb->in6p_sp->sp_in);
1128 key_freesp_so(&pcb->in6p_sp->sp_out);
1129 #endif
1130 }
1131 break;
1132 #endif /* INET6 */
1133 default:
1134 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1135 so->so_proto->pr_domain->dom_family));
1136 break;
1137 }
1138 lwkt_reltoken(&key_token);
1139 }
1140
1141 static void
1142 key_freesp_so(struct secpolicy **sp)
1143 {
1144 /* sanity check */
1145 if (sp == NULL || *sp == NULL)
1146 panic("key_freesp_so: sp == NULL");
1147
1148 switch ((*sp)->policy) {
1149 case IPSEC_POLICY_IPSEC:
1150 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1151 kprintf("DP freeso calls free SP:%p\n", *sp));
1152 key_freesp(*sp);
1153 *sp = NULL;
1154 break;
1155 case IPSEC_POLICY_ENTRUST:
1156 case IPSEC_POLICY_BYPASS:
1157 return;
1158 default:
1159 panic("key_freesp_so: Invalid policy found %d", (*sp)->policy);
1160 }
1161
1162 return;
1163 }
1164
1165 /*
1166 * Must be called after calling key_allocsa().
1167 * This function is called by key_freesp() to free some SA allocated
1168 * for a policy.
1169 */
1170 void
1171 key_freesav(struct secasvar *sav)
1172 {
1173 /* sanity check */
1174 if (sav == NULL)
1175 panic("key_freesav: NULL pointer is passed.");
1176
1177 lwkt_gettoken(&key_token);
1178 sav->refcnt--;
1179 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1180 kprintf("DP freesav cause refcnt--:%d SA:%p SPI %u\n",
1181 sav->refcnt, sav, (u_int32_t)ntohl(sav->spi)));
1182
1183 if (sav->refcnt == 0)
1184 key_delsav(sav);
1185
1186 lwkt_reltoken(&key_token);
1187 }
1188
1189 /* %%% SPD management */
1190 /*
1191 * free security policy entry.
1192 */
1193 static void
1194 key_delsp(struct secpolicy *sp)
1195 {
1196 /* sanity check */
1197 if (sp == NULL)
1198 panic("key_delsp: NULL pointer is passed.");
1199
1200 sp->state = IPSEC_SPSTATE_DEAD;
1201
1202 if (sp->refcnt > 0)
1203 return; /* can't free */
1204
1205 /* remove from SP index */
1206 if (__LIST_CHAINED(sp))
1207 LIST_REMOVE(sp, chain);
1208
1209 {
1210 struct ipsecrequest *isr = sp->req, *nextisr;
1211
1212 while (isr != NULL) {
1213 if (isr->sav != NULL) {
1214 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1215 kprintf("DP delsp calls free SA:%p\n",
1216 isr->sav));
1217 key_freesav(isr->sav);
1218 isr->sav = NULL;
1219 }
1220
1221 nextisr = isr->next;
1222 KFREE(isr);
1223 isr = nextisr;
1224 }
1225 }
1226 keydb_delsecpolicy(sp);
1227 }
1228
1229 /*
1230 * search SPD
1231 * OUT: NULL : not found
1232 * others : found, pointer to a SP.
1233 */
1234 static struct secpolicy *
1235 key_getsp(struct secpolicyindex *spidx)
1236 {
1237 struct secpolicy *sp;
1238
1239 /* sanity check */
1240 if (spidx == NULL)
1241 panic("key_getsp: NULL pointer is passed.");
1242
1243 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1244 if (sp->state == IPSEC_SPSTATE_DEAD)
1245 continue;
1246 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1247 sp->refcnt++;
1248 return sp;
1249 }
1250 }
1251
1252 return NULL;
1253 }
1254
1255 /*
1256 * get SP by index.
1257 * OUT: NULL : not found
1258 * others : found, pointer to a SP.
1259 */
1260 static struct secpolicy *
1261 key_getspbyid(u_int32_t id)
1262 {
1263 struct secpolicy *sp;
1264
1265 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1266 if (sp->state == IPSEC_SPSTATE_DEAD)
1267 continue;
1268 if (sp->id == id) {
1269 sp->refcnt++;
1270 return sp;
1271 }
1272 }
1273
1274 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1275 if (sp->state == IPSEC_SPSTATE_DEAD)
1276 continue;
1277 if (sp->id == id) {
1278 sp->refcnt++;
1279 return sp;
1280 }
1281 }
1282
1283 return NULL;
1284 }
1285
1286 struct secpolicy *
1287 key_newsp(void)
1288 {
1289 struct secpolicy *newsp = NULL;
1290
1291 lwkt_gettoken(&key_token);
1292 newsp = keydb_newsecpolicy();
1293 if (newsp) {
1294 newsp->refcnt = 1;
1295 newsp->req = NULL;
1296 }
1297 lwkt_reltoken(&key_token);
1298
1299 return newsp;
1300 }
1301
1302 /*
1303 * create secpolicy structure from sadb_x_policy structure.
1304 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1305 * so must be set properly later.
1306 */
1307 struct secpolicy *
1308 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1309 {
1310 struct secpolicy *newsp;
1311
1312 /* sanity check */
1313 if (xpl0 == NULL)
1314 panic("key_msg2sp: NULL pointer was passed.");
1315 if (len < sizeof(*xpl0))
1316 panic("key_msg2sp: invalid length.");
1317 if (len != PFKEY_EXTLEN(xpl0)) {
1318 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1319 *error = EINVAL;
1320 return NULL;
1321 }
1322
1323 lwkt_gettoken(&key_token);
1324 if ((newsp = key_newsp()) == NULL) {
1325 lwkt_reltoken(&key_token);
1326 *error = ENOBUFS;
1327 return NULL;
1328 }
1329
1330 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1331 newsp->policy = xpl0->sadb_x_policy_type;
1332
1333 /* check policy */
1334 switch (xpl0->sadb_x_policy_type) {
1335 case IPSEC_POLICY_DISCARD:
1336 case IPSEC_POLICY_NONE:
1337 case IPSEC_POLICY_ENTRUST:
1338 case IPSEC_POLICY_BYPASS:
1339 newsp->req = NULL;
1340 break;
1341
1342 case IPSEC_POLICY_IPSEC:
1343 {
1344 int tlen;
1345 struct sadb_x_ipsecrequest *xisr;
1346 struct ipsecrequest **p_isr = &newsp->req;
1347
1348 /* validity check */
1349 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1350 ipseclog((LOG_DEBUG,
1351 "key_msg2sp: Invalid msg length.\n"));
1352 key_freesp(newsp);
1353 lwkt_reltoken(&key_token);
1354 *error = EINVAL;
1355 return NULL;
1356 }
1357
1358 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1359 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1360
1361 while (tlen > 0) {
1362
1363 /* length check */
1364 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1365 ipseclog((LOG_DEBUG, "key_msg2sp: "
1366 "invalid ipsecrequest length.\n"));
1367 key_freesp(newsp);
1368 lwkt_reltoken(&key_token);
1369 *error = EINVAL;
1370 return NULL;
1371 }
1372
1373 /* allocate request buffer */
1374 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1375 if ((*p_isr) == NULL) {
1376 ipseclog((LOG_DEBUG,
1377 "key_msg2sp: No more memory.\n"));
1378 key_freesp(newsp);
1379 lwkt_reltoken(&key_token);
1380 *error = ENOBUFS;
1381 return NULL;
1382 }
1383 bzero(*p_isr, sizeof(**p_isr));
1384
1385 /* set values */
1386 (*p_isr)->next = NULL;
1387
1388 switch (xisr->sadb_x_ipsecrequest_proto) {
1389 case IPPROTO_ESP:
1390 case IPPROTO_AH:
1391 case IPPROTO_IPCOMP:
1392 break;
1393 default:
1394 ipseclog((LOG_DEBUG,
1395 "key_msg2sp: invalid proto type=%u\n",
1396 xisr->sadb_x_ipsecrequest_proto));
1397 key_freesp(newsp);
1398 lwkt_reltoken(&key_token);
1399 *error = EPROTONOSUPPORT;
1400 return NULL;
1401 }
1402 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1403
1404 switch (xisr->sadb_x_ipsecrequest_mode) {
1405 case IPSEC_MODE_TRANSPORT:
1406 case IPSEC_MODE_TUNNEL:
1407 break;
1408 case IPSEC_MODE_ANY:
1409 default:
1410 ipseclog((LOG_DEBUG,
1411 "key_msg2sp: invalid mode=%u\n",
1412 xisr->sadb_x_ipsecrequest_mode));
1413 key_freesp(newsp);
1414 lwkt_reltoken(&key_token);
1415 *error = EINVAL;
1416 return NULL;
1417 }
1418 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1419
1420 switch (xisr->sadb_x_ipsecrequest_level) {
1421 case IPSEC_LEVEL_DEFAULT:
1422 case IPSEC_LEVEL_USE:
1423 case IPSEC_LEVEL_REQUIRE:
1424 break;
1425 case IPSEC_LEVEL_UNIQUE:
1426 /* validity check */
1427 /*
1428 * If range violation of reqid, kernel will
1429 * update it, don't refuse it.
1430 */
1431 if (xisr->sadb_x_ipsecrequest_reqid
1432 > IPSEC_MANUAL_REQID_MAX) {
1433 ipseclog((LOG_DEBUG,
1434 "key_msg2sp: reqid=%d range "
1435 "violation, updated by kernel.\n",
1436 xisr->sadb_x_ipsecrequest_reqid));
1437 xisr->sadb_x_ipsecrequest_reqid = 0;
1438 }
1439
1440 /* allocate new reqid id if reqid is zero. */
1441 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1442 u_int32_t reqid;
1443 if ((reqid = key_newreqid()) == 0) {
1444 key_freesp(newsp);
1445 lwkt_reltoken(&key_token);
1446 *error = ENOBUFS;
1447 return NULL;
1448 }
1449 (*p_isr)->saidx.reqid = reqid;
1450 xisr->sadb_x_ipsecrequest_reqid = reqid;
1451 } else {
1452 /* set it for manual keying. */
1453 (*p_isr)->saidx.reqid =
1454 xisr->sadb_x_ipsecrequest_reqid;
1455 }
1456 break;
1457
1458 default:
1459 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1460 xisr->sadb_x_ipsecrequest_level));
1461 key_freesp(newsp);
1462 lwkt_reltoken(&key_token);
1463 *error = EINVAL;
1464 return NULL;
1465 }
1466 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1467
1468 /* set IP addresses if there */
1469 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1470 struct sockaddr *paddr;
1471
1472 paddr = (struct sockaddr *)(xisr + 1);
1473
1474 /* validity check */
1475 if (paddr->sa_len
1476 > sizeof((*p_isr)->saidx.src)) {
1477 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1478 "address length.\n"));
1479 key_freesp(newsp);
1480 lwkt_reltoken(&key_token);
1481 *error = EINVAL;
1482 return NULL;
1483 }
1484 bcopy(paddr, &(*p_isr)->saidx.src,
1485 paddr->sa_len);
1486
1487 paddr = (struct sockaddr *)((caddr_t)paddr
1488 + paddr->sa_len);
1489
1490 /* validity check */
1491 if (paddr->sa_len
1492 > sizeof((*p_isr)->saidx.dst)) {
1493 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1494 "address length.\n"));
1495 key_freesp(newsp);
1496 lwkt_reltoken(&key_token);
1497 *error = EINVAL;
1498 return NULL;
1499 }
1500 bcopy(paddr, &(*p_isr)->saidx.dst,
1501 paddr->sa_len);
1502 }
1503
1504 (*p_isr)->sav = NULL;
1505 (*p_isr)->sp = newsp;
1506
1507 /* initialization for the next. */
1508 p_isr = &(*p_isr)->next;
1509 tlen -= xisr->sadb_x_ipsecrequest_len;
1510
1511 /* validity check */
1512 if (tlen < 0) {
1513 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1514 key_freesp(newsp);
1515 lwkt_reltoken(&key_token);
1516 *error = EINVAL;
1517 return NULL;
1518 }
1519
1520 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1521 + xisr->sadb_x_ipsecrequest_len);
1522 }
1523 }
1524 break;
1525 default:
1526 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1527 key_freesp(newsp);
1528 lwkt_reltoken(&key_token);
1529 *error = EINVAL;
1530 return NULL;
1531 }
1532 lwkt_reltoken(&key_token);
1533 *error = 0;
1534 return newsp;
1535 }
1536
1537 static u_int32_t
1538 key_newreqid(void)
1539 {
1540 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1541
1542 auto_reqid = (auto_reqid == ~0
1543 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1544
1545 /* XXX should be unique check */
1546
1547 return auto_reqid;
1548 }
1549
1550 /*
1551 * copy secpolicy struct to sadb_x_policy structure indicated.
1552 */
1553 struct mbuf *
1554 key_sp2msg(struct secpolicy *sp)
1555 {
1556 struct sadb_x_policy *xpl;
1557 int tlen;
1558 caddr_t p;
1559 struct mbuf *m;
1560
1561 /* sanity check. */
1562 if (sp == NULL)
1563 panic("key_sp2msg: NULL pointer was passed.");
1564
1565 lwkt_gettoken(&key_token);
1566 tlen = key_getspreqmsglen(sp);
1567
1568 m = key_alloc_mbuf(tlen);
1569 if (!m || m->m_next) { /*XXX*/
1570 if (m)
1571 m_freem(m);
1572 lwkt_reltoken(&key_token);
1573 return NULL;
1574 }
1575
1576 m->m_len = tlen;
1577 m->m_next = NULL;
1578 xpl = mtod(m, struct sadb_x_policy *);
1579 bzero(xpl, tlen);
1580
1581 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1582 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1583 xpl->sadb_x_policy_type = sp->policy;
1584 xpl->sadb_x_policy_dir = sp->spidx.dir;
1585 xpl->sadb_x_policy_id = sp->id;
1586 p = (caddr_t)xpl + sizeof(*xpl);
1587
1588 /* if is the policy for ipsec ? */
1589 if (sp->policy == IPSEC_POLICY_IPSEC) {
1590 struct sadb_x_ipsecrequest *xisr;
1591 struct ipsecrequest *isr;
1592
1593 for (isr = sp->req; isr != NULL; isr = isr->next) {
1594
1595 xisr = (struct sadb_x_ipsecrequest *)p;
1596
1597 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1598 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1599 xisr->sadb_x_ipsecrequest_level = isr->level;
1600 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1601
1602 p += sizeof(*xisr);
1603 bcopy(&isr->saidx.src, p, isr->saidx.src.ss_len);
1604 p += isr->saidx.src.ss_len;
1605 bcopy(&isr->saidx.dst, p, isr->saidx.dst.ss_len);
1606 p += isr->saidx.src.ss_len;
1607
1608 xisr->sadb_x_ipsecrequest_len =
1609 PFKEY_ALIGN8(sizeof(*xisr)
1610 + isr->saidx.src.ss_len
1611 + isr->saidx.dst.ss_len);
1612 }
1613 }
1614 lwkt_reltoken(&key_token);
1615 return m;
1616 }
1617
1618 /* m will not be freed nor modified */
1619 static struct mbuf *
1620 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1621 int ndeep, int nitem, ...)
1622 {
1623 __va_list ap;
1624 int idx;
1625 int i;
1626 struct mbuf *result = NULL, *n;
1627 int len;
1628
1629 if (m == NULL || mhp == NULL)
1630 panic("null pointer passed to key_gather");
1631
1632 __va_start(ap, nitem);
1633 for (i = 0; i < nitem; i++) {
1634 idx = __va_arg(ap, int);
1635 if (idx < 0 || idx > SADB_EXT_MAX)
1636 goto fail;
1637 /* don't attempt to pull empty extension */
1638 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1639 continue;
1640 if (idx != SADB_EXT_RESERVED &&
1641 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1642 continue;
1643
1644 if (idx == SADB_EXT_RESERVED) {
1645 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1646 #ifdef DIAGNOSTIC
1647 if (len > MHLEN)
1648 panic("assumption failed");
1649 #endif
1650 MGETHDR(n, M_NOWAIT, MT_DATA);
1651 if (!n)
1652 goto fail;
1653 n->m_len = len;
1654 n->m_next = NULL;
1655 m_copydata(m, 0, sizeof(struct sadb_msg),
1656 mtod(n, caddr_t));
1657 } else if (i < ndeep) {
1658 len = mhp->extlen[idx];
1659 n = key_alloc_mbuf(len);
1660 if (!n || n->m_next) { /*XXX*/
1661 if (n)
1662 m_freem(n);
1663 goto fail;
1664 }
1665 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1666 mtod(n, caddr_t));
1667 } else {
1668 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1669 M_NOWAIT);
1670 }
1671 if (n == NULL)
1672 goto fail;
1673
1674 if (result)
1675 m_cat(result, n);
1676 else
1677 result = n;
1678 }
1679 __va_end(ap);
1680
1681 if ((result->m_flags & M_PKTHDR) != 0) {
1682 result->m_pkthdr.len = 0;
1683 for (n = result; n; n = n->m_next)
1684 result->m_pkthdr.len += n->m_len;
1685 }
1686
1687 return result;
1688
1689 fail:
1690 m_freem(result);
1691 return NULL;
1692 }
1693
1694 /*
1695 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1696 * add a entry to SP database, when received
1697 * <base, address(SD), (lifetime(H),) policy>
1698 * from the user(?).
1699 * Adding to SP database,
1700 * and send
1701 * <base, address(SD), (lifetime(H),) policy>
1702 * to the socket which was send.
1703 *
1704 * SPDADD set a unique policy entry.
1705 * SPDSETIDX like SPDADD without a part of policy requests.
1706 * SPDUPDATE replace a unique policy entry.
1707 *
1708 * m will always be freed.
1709 */
1710 static int
1711 key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
1712 {
1713 struct sadb_address *src0, *dst0;
1714 struct sadb_x_policy *xpl0, *xpl;
1715 struct sadb_lifetime *lft = NULL;
1716 struct secpolicyindex spidx;
1717 struct secpolicy *newsp;
1718 struct timeval tv;
1719 int error;
1720
1721 /* sanity check */
1722 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1723 panic("key_spdadd: NULL pointer is passed.");
1724
1725 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1726 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1727 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1728 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1729 return key_senderror(so, m, EINVAL);
1730 }
1731 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1732 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1733 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1734 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1735 return key_senderror(so, m, EINVAL);
1736 }
1737 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1738 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1739 < sizeof(struct sadb_lifetime)) {
1740 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1741 return key_senderror(so, m, EINVAL);
1742 }
1743 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1744 }
1745
1746 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1747 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1748 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1749
1750 /* make secindex */
1751 /* XXX boundary check against sa_len */
1752 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1753 src0 + 1,
1754 dst0 + 1,
1755 src0->sadb_address_prefixlen,
1756 dst0->sadb_address_prefixlen,
1757 src0->sadb_address_proto,
1758 &spidx);
1759
1760 /* checking the direciton. */
1761 switch (xpl0->sadb_x_policy_dir) {
1762 case IPSEC_DIR_INBOUND:
1763 case IPSEC_DIR_OUTBOUND:
1764 break;
1765 default:
1766 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1767 mhp->msg->sadb_msg_errno = EINVAL;
1768 return 0;
1769 }
1770
1771 /* check policy */
1772 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1773 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1774 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1775 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1776 return key_senderror(so, m, EINVAL);
1777 }
1778
1779 /* policy requests are mandatory when action is ipsec. */
1780 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1781 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1782 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1783 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1784 return key_senderror(so, m, EINVAL);
1785 }
1786
1787 /*
1788 * checking there is SP already or not.
1789 * SPDUPDATE doesn't depend on whether there is a SP or not.
1790 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1791 * then error.
1792 */
1793 newsp = key_getsp(&spidx);
1794 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1795 if (newsp) {
1796 newsp->state = IPSEC_SPSTATE_DEAD;
1797 key_freesp(newsp);
1798 }
1799 } else {
1800 if (newsp != NULL) {
1801 key_freesp(newsp);
1802 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1803 return key_senderror(so, m, EEXIST);
1804 }
1805 }
1806
1807 /* allocation new SP entry */
1808 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1809 return key_senderror(so, m, error);
1810 }
1811
1812 if ((newsp->id = key_getnewspid()) == 0) {
1813 keydb_delsecpolicy(newsp);
1814 return key_senderror(so, m, ENOBUFS);
1815 }
1816
1817 /* XXX boundary check against sa_len */
1818 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1819 src0 + 1,
1820 dst0 + 1,
1821 src0->sadb_address_prefixlen,
1822 dst0->sadb_address_prefixlen,
1823 src0->sadb_address_proto,
1824 &newsp->spidx);
1825
1826 /* sanity check on addr pair */
1827 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1828 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1829 keydb_delsecpolicy(newsp);
1830 return key_senderror(so, m, EINVAL);
1831 }
1832 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1833 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1834 keydb_delsecpolicy(newsp);
1835 return key_senderror(so, m, EINVAL);
1836 }
1837 #if 1
1838 if (newsp->req && newsp->req->saidx.src.ss_family) {
1839 struct sockaddr *sa;
1840 sa = (struct sockaddr *)(src0 + 1);
1841 if (sa->sa_family != newsp->req->saidx.src.ss_family) {
1842 keydb_delsecpolicy(newsp);
1843 return key_senderror(so, m, EINVAL);
1844 }
1845 }
1846 if (newsp->req && newsp->req->saidx.dst.ss_family) {
1847 struct sockaddr *sa;
1848 sa = (struct sockaddr *)(dst0 + 1);
1849 if (sa->sa_family != newsp->req->saidx.dst.ss_family) {
1850 keydb_delsecpolicy(newsp);
1851 return key_senderror(so, m, EINVAL);
1852 }
1853 }
1854 #endif
1855
1856 microtime(&tv);
1857 newsp->created = tv.tv_sec;
1858 newsp->lastused = tv.tv_sec;
1859 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1860 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1861
1862 newsp->refcnt = 1; /* do not reclaim until I say I do */
1863 newsp->state = IPSEC_SPSTATE_ALIVE;
1864 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1865
1866 /* delete the entry in spacqtree */
1867 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1868 struct secspacq *spacq;
1869 if ((spacq = key_getspacq(&spidx)) != NULL) {
1870 /* reset counter in order to deletion by timehandler. */
1871 microtime(&tv);
1872 spacq->created = tv.tv_sec;
1873 spacq->count = 0;
1874 }
1875 }
1876
1877 {
1878 struct mbuf *n, *mpolicy;
1879 struct sadb_msg *newmsg;
1880 int off;
1881
1882 /* create new sadb_msg to reply. */
1883 if (lft) {
1884 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1885 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1886 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1887 } else {
1888 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1889 SADB_X_EXT_POLICY,
1890 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1891 }
1892 if (!n)
1893 return key_senderror(so, m, ENOBUFS);
1894
1895 if (n->m_len < sizeof(*newmsg)) {
1896 n = m_pullup(n, sizeof(*newmsg));
1897 if (!n)
1898 return key_senderror(so, m, ENOBUFS);
1899 }
1900 newmsg = mtod(n, struct sadb_msg *);
1901 newmsg->sadb_msg_errno = 0;
1902 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1903
1904 off = 0;
1905 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1906 sizeof(*xpl), &off);
1907 if (mpolicy == NULL) {
1908 /* n is already freed */
1909 return key_senderror(so, m, ENOBUFS);
1910 }
1911 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1912 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1913 m_freem(n);
1914 return key_senderror(so, m, EINVAL);
1915 }
1916 xpl->sadb_x_policy_id = newsp->id;
1917
1918 m_freem(m);
1919 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1920 }
1921 }
1922
1923 /*
1924 * get new policy id.
1925 * OUT:
1926 * 0: failure.
1927 * others: success.
1928 */
1929 static u_int32_t
1930 key_getnewspid(void)
1931 {
1932 u_int32_t newid = 0;
1933 int count = key_spi_trycnt; /* XXX */
1934 struct secpolicy *sp;
1935
1936 /* when requesting to allocate spi ranged */
1937 while (count--) {
1938 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1939
1940 if ((sp = key_getspbyid(newid)) == NULL)
1941 break;
1942
1943 key_freesp(sp);
1944 }
1945
1946 if (count == 0 || newid == 0) {
1947 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1948 return 0;
1949 }
1950
1951 return newid;
1952 }
1953
1954 /*
1955 * SADB_SPDDELETE processing
1956 * receive
1957 * <base, address(SD), policy(*)>
1958 * from the user(?), and set SADB_SASTATE_DEAD,
1959 * and send,
1960 * <base, address(SD), policy(*)>
1961 * to the ikmpd.
1962 * policy(*) including direction of policy.
1963 *
1964 * m will always be freed.
1965 */
1966 static int
1967 key_spddelete(struct socket *so, struct mbuf *m,
1968 const struct sadb_msghdr *mhp)
1969 {
1970 struct sadb_address *src0, *dst0;
1971 struct sadb_x_policy *xpl0;
1972 struct secpolicyindex spidx;
1973 struct secpolicy *sp;
1974
1975 /* sanity check */
1976 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1977 panic("key_spddelete: NULL pointer is passed.");
1978
1979 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1980 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1981 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1982 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1983 return key_senderror(so, m, EINVAL);
1984 }
1985 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1986 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1987 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1988 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1989 return key_senderror(so, m, EINVAL);
1990 }
1991
1992 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1993 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1994 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1995
1996 /* make secindex */
1997 /* XXX boundary check against sa_len */
1998 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1999 src0 + 1,
2000 dst0 + 1,
2001 src0->sadb_address_prefixlen,
2002 dst0->sadb_address_prefixlen,
2003 src0->sadb_address_proto,
2004 &spidx);
2005
2006 /* checking the direciton. */
2007 switch (xpl0->sadb_x_policy_dir) {
2008 case IPSEC_DIR_INBOUND:
2009 case IPSEC_DIR_OUTBOUND:
2010 break;
2011 default:
2012 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
2013 return key_senderror(so, m, EINVAL);
2014 }
2015
2016 /* Is there SP in SPD ? */
2017 if ((sp = key_getsp(&spidx)) == NULL) {
2018 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2019 return key_senderror(so, m, EINVAL);
2020 }
2021
2022 /* save policy id to buffer to be returned. */
2023 xpl0->sadb_x_policy_id = sp->id;
2024
2025 sp->state = IPSEC_SPSTATE_DEAD;
2026 key_freesp(sp);
2027
2028 {
2029 struct mbuf *n;
2030 struct sadb_msg *newmsg;
2031
2032 /* create new sadb_msg to reply. */
2033 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2034 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2035 if (!n)
2036 return key_senderror(so, m, ENOBUFS);
2037
2038 newmsg = mtod(n, struct sadb_msg *);
2039 newmsg->sadb_msg_errno = 0;
2040 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2041
2042 m_freem(m);
2043 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2044 }
2045 }
2046
2047 /*
2048 * SADB_SPDDELETE2 processing
2049 * receive
2050 * <base, policy(*)>
2051 * from the user(?), and set SADB_SASTATE_DEAD,
2052 * and send,
2053 * <base, policy(*)>
2054 * to the ikmpd.
2055 * policy(*) including direction of policy.
2056 *
2057 * m will always be freed.
2058 */
2059 static int
2060 key_spddelete2(struct socket *so, struct mbuf *m,
2061 const struct sadb_msghdr *mhp)
2062 {
2063 u_int32_t id;
2064 struct secpolicy *sp;
2065
2066 /* sanity check */
2067 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2068 panic("key_spddelete2: NULL pointer is passed.");
2069
2070 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2071 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2072 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2073 key_senderror(so, m, EINVAL);
2074 return 0;
2075 }
2076
2077 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2078
2079 /* Is there SP in SPD ? */
2080 if ((sp = key_getspbyid(id)) == NULL) {
2081 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2082 key_senderror(so, m, EINVAL);
2083 }
2084
2085 sp->state = IPSEC_SPSTATE_DEAD;
2086 key_freesp(sp);
2087
2088 {
2089 struct mbuf *n, *nn;
2090 struct sadb_msg *newmsg;
2091 int off, len;
2092
2093 /* create new sadb_msg to reply. */
2094 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2095
2096 if (len > MCLBYTES)
2097 return key_senderror(so, m, ENOBUFS);
2098 MGETHDR(n, M_NOWAIT, MT_DATA);
2099 if (n && len > MHLEN) {
2100 MCLGET(n, M_NOWAIT);
2101 if ((n->m_flags & M_EXT) == 0) {
2102 m_freem(n);
2103 n = NULL;
2104 }
2105 }
2106 if (!n)
2107 return key_senderror(so, m, ENOBUFS);
2108
2109 n->m_len = len;
2110 n->m_next = NULL;
2111 off = 0;
2112
2113 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2114 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2115
2116 #ifdef DIAGNOSTIC
2117 if (off != len)
2118 panic("length inconsistency in key_spddelete2");
2119 #endif
2120
2121 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2122 mhp->extlen[SADB_X_EXT_POLICY], M_NOWAIT);
2123 if (!n->m_next) {
2124 m_freem(n);
2125 return key_senderror(so, m, ENOBUFS);
2126 }
2127
2128 n->m_pkthdr.len = 0;
2129 for (nn = n; nn; nn = nn->m_next)
2130 n->m_pkthdr.len += nn->m_len;
2131
2132 newmsg = mtod(n, struct sadb_msg *);
2133 newmsg->sadb_msg_errno = 0;
2134 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2135
2136 m_freem(m);
2137 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2138 }
2139 }
2140
2141 /*
2142 * SADB_X_GET processing
2143 * receive
2144 * <base, policy(*)>
2145 * from the user(?),
2146 * and send,
2147 * <base, address(SD), policy>
2148 * to the ikmpd.
2149 * policy(*) including direction of policy.
2150 *
2151 * m will always be freed.
2152 */
2153 static int
2154 key_spdget(struct socket *so, struct mbuf *m,
2155 const struct sadb_msghdr *mhp)
2156 {
2157 u_int32_t id;
2158 struct secpolicy *sp;
2159 struct mbuf *n;
2160
2161 /* sanity check */
2162 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2163 panic("key_spdget: NULL pointer is passed.");
2164
2165 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2166 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2167 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2168 return key_senderror(so, m, EINVAL);
2169 }
2170
2171 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2172
2173 /* Is there SP in SPD ? */
2174 if ((sp = key_getspbyid(id)) == NULL) {
2175 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2176 return key_senderror(so, m, ENOENT);
2177 }
2178
2179 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2180 if (n != NULL) {
2181 m_freem(m);
2182 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2183 } else
2184 return key_senderror(so, m, ENOBUFS);
2185 }
2186
2187 /*
2188 * SADB_X_SPDACQUIRE processing.
2189 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2190 * send
2191 * <base, policy(*)>
2192 * to KMD, and expect to receive
2193 * <base> with SADB_X_SPDACQUIRE if error occured,
2194 * or
2195 * <base, policy>
2196 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2197 * policy(*) is without policy requests.
2198 *
2199 * 0 : succeed
2200 * others: error number
2201 */
2202 int
2203 key_spdacquire(struct secpolicy *sp)
2204 {
2205 struct mbuf *result = NULL, *m;
2206 struct secspacq *newspacq;
2207 int error;
2208
2209 /* sanity check */
2210 if (sp == NULL)
2211 panic("key_spdacquire: NULL pointer is passed.");
2212 if (sp->req != NULL)
2213 panic("key_spdacquire: called but there is request.");
2214 if (sp->policy != IPSEC_POLICY_IPSEC)
2215 panic("key_spdacquire: policy mismatched. IPsec is expected.");
2216
2217 lwkt_gettoken(&key_token);
2218 /* get a entry to check whether sent message or not. */
2219 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2220 if (key_blockacq_count < newspacq->count) {
2221 /* reset counter and do send message. */
2222 newspacq->count = 0;
2223 } else {
2224 /* increment counter and do nothing. */
2225 newspacq->count++;
2226 lwkt_reltoken(&key_token);
2227 return 0;
2228 }
2229 } else {
2230 /* make new entry for blocking to send SADB_ACQUIRE. */
2231 if ((newspacq = key_newspacq(&sp->spidx)) == NULL) {
2232 lwkt_reltoken(&key_token);
2233 return ENOBUFS;
2234 }
2235
2236 /* add to acqtree */
2237 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2238 }
2239
2240 /* create new sadb_msg to reply. */
2241 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2242 if (!m) {
2243 error = ENOBUFS;
2244 goto fail;
2245 }
2246 result = m;
2247
2248 result->m_pkthdr.len = 0;
2249 for (m = result; m; m = m->m_next)
2250 result->m_pkthdr.len += m->m_len;
2251
2252 mtod(result, struct sadb_msg *)->sadb_msg_len =
2253 PFKEY_UNIT64(result->m_pkthdr.len);
2254
2255 error = key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2256 lwkt_reltoken(&key_token);
2257 return error;
2258
2259 fail:
2260 lwkt_reltoken(&key_token);
2261 if (result)
2262 m_freem(result);
2263 return error;
2264 }
2265
2266 /*
2267 * SADB_SPDFLUSH processing
2268 * receive
2269 * <base>
2270 * from the user, and free all entries in secpctree.
2271 * and send,
2272 * <base>
2273 * to the user.
2274 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2275 *
2276 * m will always be freed.
2277 */
2278 static int
2279 key_spdflush(struct socket *so, struct mbuf *m,
2280 const struct sadb_msghdr *mhp)
2281 {
2282 struct sadb_msg *newmsg;
2283 struct secpolicy *sp;
2284 u_int dir;
2285
2286 /* sanity check */
2287 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2288 panic("key_spdflush: NULL pointer is passed.");
2289
2290 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2291 return key_senderror(so, m, EINVAL);
2292
2293 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2294 LIST_FOREACH(sp, &sptree[dir], chain) {
2295 sp->state = IPSEC_SPSTATE_DEAD;
2296 }
2297 }
2298
2299 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2300 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2301 return key_senderror(so, m, ENOBUFS);
2302 }
2303
2304 if (m->m_next)
2305 m_freem(m->m_next);
2306 m->m_next = NULL;
2307 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2308 newmsg = mtod(m, struct sadb_msg *);
2309 newmsg->sadb_msg_errno = 0;
2310 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2311
2312 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2313 }
2314
2315 /*
2316 * SADB_SPDDUMP processing
2317 * receive
2318 * <base>
2319 * from the user, and dump all SP leaves
2320 * and send,
2321 * <base> .....
2322 * to the ikmpd.
2323 *
2324 * m will always be freed.
2325 */
2326 static int
2327 key_spddump(struct socket *so, struct mbuf *m,
2328 const struct sadb_msghdr *mhp)
2329 {
2330 struct secpolicy *sp;
2331 int cnt;
2332 u_int dir;
2333 struct mbuf *n;
2334
2335 /* sanity check */
2336 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2337 panic("key_spddump: NULL pointer is passed.");
2338
2339 /* search SPD entry and get buffer size. */
2340 cnt = 0;
2341 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2342 LIST_FOREACH(sp, &sptree[dir], chain) {
2343 cnt++;
2344 }
2345 }
2346
2347 if (cnt == 0)
2348 return key_senderror(so, m, ENOENT);
2349
2350 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2351 LIST_FOREACH(sp, &sptree[dir], chain) {
2352 --cnt;
2353 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2354 mhp->msg->sadb_msg_pid);
2355
2356 if (n)
2357 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2358 }
2359 }
2360
2361 m_freem(m);
2362 return 0;
2363 }
2364
2365 static struct mbuf *
2366 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2367 u_int32_t pid)
2368 {
2369 struct mbuf *result = NULL, *m;
2370
2371 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2372 if (!m)
2373 goto fail;
2374 result = m;
2375
2376 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2377 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
2378 sp->spidx.ul_proto);
2379 if (!m)
2380 goto fail;
2381 m_cat(result, m);
2382
2383 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2384 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
2385 sp->spidx.ul_proto);
2386 if (!m)
2387 goto fail;
2388 m_cat(result, m);
2389
2390 m = key_sp2msg(sp);
2391 if (!m)
2392 goto fail;
2393 m_cat(result, m);
2394
2395 if ((result->m_flags & M_PKTHDR) == 0)
2396 goto fail;
2397
2398 if (result->m_len < sizeof(struct sadb_msg)) {
2399 result = m_pullup(result, sizeof(struct sadb_msg));
2400 if (result == NULL)
2401 goto fail;
2402 }
2403
2404 result->m_pkthdr.len = 0;
2405 for (m = result; m; m = m->m_next)
2406 result->m_pkthdr.len += m->m_len;
2407
2408 mtod(result, struct sadb_msg *)->sadb_msg_len =
2409 PFKEY_UNIT64(result->m_pkthdr.len);
2410
2411 return result;
2412
2413 fail:
2414 m_freem(result);
2415 return NULL;
2416 }
2417
2418 /*
2419 * get PFKEY message length for security policy and request.
2420 */
2421 static u_int
2422 key_getspreqmsglen(struct secpolicy *sp)
2423 {
2424 u_int tlen;
2425
2426 tlen = sizeof(struct sadb_x_policy);
2427
2428 /* if is the policy for ipsec ? */
2429 if (sp->policy != IPSEC_POLICY_IPSEC)
2430 return tlen;
2431
2432 /* get length of ipsec requests */
2433 {
2434 struct ipsecrequest *isr;
2435 int len;
2436
2437 for (isr = sp->req; isr != NULL; isr = isr->next) {
2438 len = sizeof(struct sadb_x_ipsecrequest)
2439 + isr->saidx.src.ss_len
2440 + isr->saidx.dst.ss_len;
2441
2442 tlen += PFKEY_ALIGN8(len);
2443 }
2444 }
2445
2446 return tlen;
2447 }
2448
2449 /*
2450 * SADB_SPDEXPIRE processing
2451 * send
2452 * <base, address(SD), lifetime(CH), policy>
2453 * to KMD by PF_KEY.
2454 *
2455 * OUT: 0 : succeed
2456 * others : error number
2457 */
2458 static int
2459 key_spdexpire(struct secpolicy *sp)
2460 {
2461 struct mbuf *result = NULL, *m;
2462 int len;
2463 int error = -1;
2464 struct sadb_lifetime *lt;
2465
2466 /* XXX: Why do we lock ? */
2467
2468 /* sanity check */
2469 if (sp == NULL)
2470 panic("key_spdexpire: NULL pointer is passed.");
2471
2472 /* set msg header */
2473 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2474 if (!m) {
2475 error = ENOBUFS;
2476 goto fail;
2477 }
2478 result = m;
2479
2480 /* create lifetime extension (current and hard) */
2481 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2482 m = key_alloc_mbuf(len);
2483 if (!m || m->m_next) { /*XXX*/
2484 if (m)
2485 m_freem(m);
2486 error = ENOBUFS;
2487 goto fail;
2488 }
2489 bzero(mtod(m, caddr_t), len);
2490 lt = mtod(m, struct sadb_lifetime *);
2491 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2492 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2493 lt->sadb_lifetime_allocations = 0;
2494 lt->sadb_lifetime_bytes = 0;
2495 lt->sadb_lifetime_addtime = sp->created;
2496 lt->sadb_lifetime_usetime = sp->lastused;
2497 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2498 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2499 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2500 lt->sadb_lifetime_allocations = 0;
2501 lt->sadb_lifetime_bytes = 0;
2502 lt->sadb_lifetime_addtime = sp->lifetime;
2503 lt->sadb_lifetime_usetime = sp->validtime;
2504 m_cat(result, m);
2505
2506 /* set sadb_address for source */
2507 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2508 (struct sockaddr *)&sp->spidx.src,
2509 sp->spidx.prefs, sp->spidx.ul_proto);
2510 if (!m) {
2511 error = ENOBUFS;
2512 goto fail;
2513 }
2514 m_cat(result, m);
2515
2516 /* set sadb_address for destination */
2517 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2518 (struct sockaddr *)&sp->spidx.dst,
2519 sp->spidx.prefd, sp->spidx.ul_proto);
2520 if (!m) {
2521 error = ENOBUFS;
2522 goto fail;
2523 }
2524 m_cat(result, m);
2525
2526 /* set secpolicy */
2527 m = key_sp2msg(sp);
2528 if (!m) {
2529 error = ENOBUFS;
2530 goto fail;
2531 }
2532 m_cat(result, m);
2533
2534 if ((result->m_flags & M_PKTHDR) == 0) {
2535 error = EINVAL;
2536 goto fail;
2537 }
2538
2539 if (result->m_len < sizeof(struct sadb_msg)) {
2540 result = m_pullup(result, sizeof(struct sadb_msg));
2541 if (result == NULL) {
2542 error = ENOBUFS;
2543 goto fail;
2544 }
2545 }
2546
2547 result->m_pkthdr.len = 0;
2548 for (m = result; m; m = m->m_next)
2549 result->m_pkthdr.len += m->m_len;
2550
2551 mtod(result, struct sadb_msg *)->sadb_msg_len =
2552 PFKEY_UNIT64(result->m_pkthdr.len);
2553
2554 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2555
2556 fail:
2557 if (result)
2558 m_freem(result);
2559 return error;
2560 }
2561
2562 /* %%% SAD management */
2563 /*
2564 * allocating a memory for new SA head, and copy from the values of mhp.
2565 * OUT: NULL : failure due to the lack of memory.
2566 * others : pointer to new SA head.
2567 */
2568 static struct secashead *
2569 key_newsah(struct secasindex *saidx)
2570 {
2571 struct secashead *newsah;
2572
2573 /* sanity check */
2574 if (saidx == NULL)
2575 panic("key_newsaidx: NULL pointer is passed.");
2576
2577 newsah = keydb_newsecashead();
2578 if (newsah == NULL)
2579 return NULL;
2580
2581 bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
2582
2583 /* add to saidxtree */
2584 newsah->state = SADB_SASTATE_MATURE;
2585 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2586
2587 return(newsah);
2588 }
2589
2590 /*
2591 * delete SA index and all SA registerd.
2592 */
2593 static void
2594 key_delsah(struct secashead *sah)
2595 {
2596 struct secasvar *sav, *nextsav;
2597 u_int stateidx, state;
2598 int zombie = 0;
2599
2600 /* sanity check */
2601 if (sah == NULL)
2602 panic("key_delsah: NULL pointer is passed.");
2603
2604 /* searching all SA registerd in the secindex. */
2605 for (stateidx = 0;
2606 stateidx < NELEM(saorder_state_any);
2607 stateidx++) {
2608
2609 state = saorder_state_any[stateidx];
2610 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2611 sav != NULL;
2612 sav = nextsav) {
2613
2614 nextsav = LIST_NEXT(sav, chain);
2615
2616 if (sav->refcnt > 0) {
2617 /* give up to delete this sa */
2618 zombie++;
2619 continue;
2620 }
2621
2622 /* sanity check */
2623 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2624
2625 key_freesav(sav);
2626
2627 /* remove back pointer */
2628 sav->sah = NULL;
2629 sav = NULL;
2630 }
2631 }
2632
2633 /* don't delete sah only if there are savs. */
2634 if (zombie)
2635 return;
2636
2637 if (sah->sa_route.ro_rt) {
2638 RTFREE(sah->sa_route.ro_rt);
2639 sah->sa_route.ro_rt = NULL;
2640 }
2641
2642 /* remove from tree of SA index */
2643 if (__LIST_CHAINED(sah))
2644 LIST_REMOVE(sah, chain);
2645
2646 KFREE(sah);
2647
2648 return;
2649 }
2650
2651 /*
2652 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2653 * and copy the values of mhp into new buffer.
2654 * When SAD message type is GETSPI:
2655 * to set sequence number from acq_seq++,
2656 * to set zero to SPI.
2657 * not to call key_setsava().
2658 * OUT: NULL : fail
2659 * others : pointer to new secasvar.
2660 *
2661 * does not modify mbuf. does not free mbuf on error.
2662 */
2663 static struct secasvar *
2664 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
2665 struct secashead *sah, int *errp)
2666 {
2667 struct secasvar *newsav;
2668 const struct sadb_sa *xsa;
2669
2670 /* sanity check */
2671 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2672 panic("key_newsa: NULL pointer is passed.");
2673
2674 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2675 if (newsav == NULL) {
2676 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2677 *errp = ENOBUFS;
2678 return NULL;
2679 }
2680 bzero((caddr_t)newsav, sizeof(struct secasvar));
2681
2682 switch (mhp->msg->sadb_msg_type) {
2683 case SADB_GETSPI:
2684 newsav->spi = 0;
2685
2686 #ifdef IPSEC_DOSEQCHECK
2687 /* sync sequence number */
2688 if (mhp->msg->sadb_msg_seq == 0)
2689 newsav->seq =
2690 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2691 else
2692 #endif
2693 newsav->seq = mhp->msg->sadb_msg_seq;
2694 break;
2695
2696 case SADB_ADD:
2697 /* sanity check */
2698 if (mhp->ext[SADB_EXT_SA] == NULL) {
2699 KFREE(newsav);
2700 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2701 *errp = EINVAL;
2702 return NULL;
2703 }
2704 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2705 newsav->spi = xsa->sadb_sa_spi;
2706 newsav->seq = mhp->msg->sadb_msg_seq;
2707 break;
2708 default:
2709 KFREE(newsav);
2710 *errp = EINVAL;
2711 return NULL;
2712 }
2713
2714 /* copy sav values */
2715 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2716 *errp = key_setsaval(newsav, m, mhp);
2717 if (*errp) {
2718 KFREE(newsav);
2719 return NULL;
2720 }
2721 }
2722
2723 /* reset created */
2724 {
2725 struct timeval tv;
2726 microtime(&tv);
2727 newsav->created = tv.tv_sec;
2728 }
2729
2730 newsav->pid = mhp->msg->sadb_msg_pid;
2731
2732 /* add to satree */
2733 newsav->sah = sah;
2734 newsav->refcnt = 1;
2735 newsav->state = SADB_SASTATE_LARVAL;
2736 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2737 secasvar, chain);
2738
2739 return newsav;
2740 }
2741
2742 /*
2743 * free() SA variable entry.
2744 */
2745 static void
2746 key_delsav(struct secasvar *sav)
2747 {
2748 /* sanity check */
2749 if (sav == NULL)
2750 panic("key_delsav: NULL pointer is passed.");
2751
2752 if (sav->refcnt > 0)
2753 return; /* can't free */
2754
2755 /* remove from SA header */
2756 if (__LIST_CHAINED(sav))
2757 LIST_REMOVE(sav, chain);
2758
2759 if (sav->key_auth != NULL) {
2760 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2761 KFREE(sav->key_auth);
2762 sav->key_auth = NULL;
2763 }
2764 if (sav->key_enc != NULL) {
2765 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2766 KFREE(sav->key_enc);
2767 sav->key_enc = NULL;
2768 }
2769 if (sav->sched) {
2770 bzero(sav->sched, sav->schedlen);
2771 KFREE(sav->sched);
2772 sav->sched = NULL;
2773 }
2774 if (sav->replay != NULL) {
2775 keydb_delsecreplay(sav->replay);
2776 sav->replay = NULL;
2777 }
2778 if (sav->lft_c != NULL) {
2779 KFREE(sav->lft_c);
2780 sav->lft_c = NULL;
2781 }
2782 if (sav->lft_h != NULL) {
2783 KFREE(sav->lft_h);
2784 sav->lft_h = NULL;
2785 }
2786 if (sav->lft_s != NULL) {
2787 KFREE(sav->lft_s);
2788 sav->lft_s = NULL;
2789 }
2790 if (sav->iv != NULL) {
2791 KFREE(sav->iv);
2792 sav->iv = NULL;
2793 }
2794
2795 KFREE(sav);
2796
2797 return;
2798 }
2799
2800 /*
2801 * search SAD.
2802 * OUT:
2803 * NULL : not found
2804 * others : found, pointer to a SA.
2805 */
2806 static struct secashead *
2807 key_getsah(struct secasindex *saidx)
2808 {
2809 struct secashead *sah;
2810
2811 LIST_FOREACH(sah, &sahtree, chain) {
2812 if (sah->state == SADB_SASTATE_DEAD)
2813 continue;
2814 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2815 return sah;
2816 }
2817
2818 return NULL;
2819 }
2820
2821 /*
2822 * check not to be duplicated SPI.
2823 * NOTE: this function is too slow due to searching all SAD.
2824 * OUT:
2825 * NULL : not found
2826 * others : found, pointer to a SA.
2827 */
2828 static struct secasvar *
2829 key_checkspidup(struct secasindex *saidx, u_int32_t spi)
2830 {
2831 struct secashead *sah;
2832 struct secasvar *sav;
2833
2834 /* check address family */
2835 if (saidx->src.ss_family != saidx->dst.ss_family) {
2836 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2837 return NULL;
2838 }
2839
2840 /* check all SAD */
2841 LIST_FOREACH(sah, &sahtree, chain) {
2842 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2843 continue;
2844 sav = key_getsavbyspi(sah, spi);
2845 if (sav != NULL)
2846 return sav;
2847 }
2848
2849 return NULL;
2850 }
2851
2852 /*
2853 * search SAD litmited alive SA, protocol, SPI.
2854 * OUT:
2855 * NULL : not found
2856 * others : found, pointer to a SA.
2857 */
2858 static struct secasvar *
2859 key_getsavbyspi(struct secashead *sah, u_int32_t spi)
2860 {
2861 struct secasvar *sav;
2862 u_int stateidx, state;
2863
2864 /* search all status */
2865 for (stateidx = 0;
2866 stateidx < NELEM(saorder_state_alive);
2867 stateidx++) {
2868
2869 state = saorder_state_alive[stateidx];
2870 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2871
2872 /* sanity check */
2873 if (sav->state != state) {
2874 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2875 "invalid sav->state (queue: %d SA: %d)\n",
2876 state, sav->state));
2877 continue;
2878 }
2879
2880 if (sav->spi == spi)
2881 return sav;
2882 }
2883 }
2884
2885 return NULL;
2886 }
2887
2888 /*
2889 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2890 * You must update these if need.
2891 * OUT: 0: success.
2892 * !0: failure.
2893 *
2894 * does not modify mbuf. does not free mbuf on error.
2895 */
2896 static int
2897 key_setsaval(struct secasvar *sav, struct mbuf *m,
2898 const struct sadb_msghdr *mhp)
2899 {
2900 #ifdef IPSEC_ESP
2901 const struct esp_algorithm *algo;
2902 #endif
2903 int error = 0;
2904 struct timeval tv;
2905
2906 /* sanity check */
2907 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2908 panic("key_setsaval: NULL pointer is passed.");
2909
2910 /* initialization */
2911 sav->replay = NULL;
2912 sav->key_auth = NULL;
2913 sav->key_enc = NULL;
2914 sav->sched = NULL;
2915 sav->schedlen = 0;
2916 sav->iv = NULL;
2917 sav->lft_c = NULL;
2918 sav->lft_h = NULL;
2919 sav->lft_s = NULL;
2920
2921 /* SA */
2922 if (mhp->ext[SADB_EXT_SA] != NULL) {
2923 const struct sadb_sa *sa0;
2924
2925 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2926 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
2927 error = EINVAL;
2928 goto fail;
2929 }
2930
2931 sav->alg_auth = sa0->sadb_sa_auth;
2932 sav->alg_enc = sa0->sadb_sa_encrypt;
2933 sav->flags = sa0->sadb_sa_flags;
2934
2935 /* replay window */
2936 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
2937 sav->replay = keydb_newsecreplay(sa0->sadb_sa_replay);
2938 if (sav->replay == NULL) {
2939 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2940 error = ENOBUFS;
2941 goto fail;
2942 }
2943 }
2944 }
2945
2946 /* Authentication keys */
2947 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2948 const struct sadb_key *key0;
2949 int len;
2950
2951 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2952 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2953
2954 error = 0;
2955 if (len < sizeof(*key0)) {
2956 error = EINVAL;
2957 goto fail;
2958 }
2959 switch (mhp->msg->sadb_msg_satype) {
2960 case SADB_SATYPE_AH:
2961 case SADB_SATYPE_ESP:
2962 case SADB_X_SATYPE_TCPSIGNATURE:
2963 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2964 sav->alg_auth != SADB_X_AALG_NULL)
2965 error = EINVAL;
2966 break;
2967 case SADB_X_SATYPE_IPCOMP:
2968 default:
2969 error = EINVAL;
2970 break;
2971 }
2972 if (error) {
2973 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2974 goto fail;
2975 }
2976
2977 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2978 if (sav->key_auth == NULL) {
2979 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2980 error = ENOBUFS;
2981 goto fail;
2982 }
2983 }
2984
2985 /* Encryption key */
2986 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2987 const struct sadb_key *key0;
2988 int len;
2989
2990 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2991 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2992
2993 error = 0;
2994 if (len < sizeof(*key0)) {
2995 error = EINVAL;
2996 goto fail;
2997 }
2998 switch (mhp->msg->sadb_msg_satype) {
2999 case SADB_SATYPE_ESP:
3000 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3001 sav->alg_enc != SADB_EALG_NULL) {
3002 error = EINVAL;
3003 break;
3004 }
3005 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
3006 if (sav->key_enc == NULL) {
3007 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3008 error = ENOBUFS;
3009 goto fail;
3010 }
3011 break;
3012 case SADB_X_SATYPE_IPCOMP:
3013 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3014 error = EINVAL;
3015 sav->key_enc = NULL; /*just in case*/
3016 break;
3017 case SADB_SATYPE_AH:
3018 case SADB_X_SATYPE_TCPSIGNATURE:
3019 default:
3020 error = EINVAL;
3021 break;
3022 }
3023 if (error) {
3024 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3025 goto fail;
3026 }
3027 }
3028
3029 /* set iv */
3030 sav->ivlen = 0;
3031
3032 switch (mhp->msg->sadb_msg_satype) {
3033 case SADB_SATYPE_ESP:
3034 #ifdef IPSEC_ESP
3035 algo = esp_algorithm_lookup(sav->alg_enc);
3036 if (algo && algo->ivlen)
3037 sav->ivlen = (*algo->ivlen)(algo, sav);
3038 if (sav->ivlen == 0)
3039 break;
3040 KMALLOC(sav->iv, caddr_t, sav->ivlen);
3041 if (sav->iv == NULL) {
3042 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3043 error = ENOBUFS;
3044 goto fail;
3045 }
3046
3047 /* initialize */
3048 key_randomfill(sav->iv, sav->ivlen);
3049 #endif
3050 break;
3051 case SADB_SATYPE_AH:
3052 case SADB_X_SATYPE_IPCOMP:
3053 case SADB_X_SATYPE_TCPSIGNATURE:
3054 break;
3055 default:
3056 ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n"));
3057 error = EINVAL;
3058 goto fail;
3059 }
3060
3061 /* reset created */
3062 microtime(&tv);
3063 sav->created = tv.tv_sec;
3064
3065 /* make lifetime for CURRENT */
3066 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3067 sizeof(struct sadb_lifetime));
3068 if (sav->lft_c == NULL) {
3069 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3070 error = ENOBUFS;
3071 goto fail;
3072 }
3073
3074 microtime(&tv);
3075
3076 sav->lft_c->sadb_lifetime_len =
3077 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3078 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3079 sav->lft_c->sadb_lifetime_allocations = 0;
3080 sav->lft_c->sadb_lifetime_bytes = 0;
3081 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
3082 sav->lft_c->sadb_lifetime_usetime = 0;
3083
3084 /* lifetimes for HARD and SOFT */
3085 {
3086 const struct sadb_lifetime *lft0;
3087
3088 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3089 if (lft0 != NULL) {
3090 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3091 error = EINVAL;
3092 goto fail;
3093 }
3094 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3095 sizeof(*lft0));
3096 if (sav->lft_h == NULL) {
3097 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3098 error = ENOBUFS;
3099 goto fail;
3100 }
3101 /* to be initialize ? */
3102 }
3103
3104 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3105 if (lft0 != NULL) {
3106 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3107 error = EINVAL;
3108 goto fail;
3109 }
3110 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3111 sizeof(*lft0));
3112 if (sav->lft_s == NULL) {
3113 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3114 error = ENOBUFS;
3115 goto fail;
3116 }
3117 /* to be initialize ? */
3118 }
3119 }
3120
3121 return 0;
3122
3123 fail:
3124 /* initialization */
3125 if (sav->replay != NULL) {
3126 keydb_delsecreplay(sav->replay);
3127 sav->replay = NULL;
3128 }
3129 if (sav->key_auth != NULL) {
3130 KFREE(sav->key_auth);
3131 sav->key_auth = NULL;
3132 }
3133 if (sav->key_enc != NULL) {
3134 KFREE(sav->key_enc);
3135 sav->key_enc = NULL;
3136 }
3137 if (sav->sched) {
3138 KFREE(sav->sched);
3139 sav->sched = NULL;
3140 }
3141 if (sav->iv != NULL) {
3142 KFREE(sav->iv);
3143 sav->iv = NULL;
3144 }
3145 if (sav->lft_c != NULL) {
3146 KFREE(sav->lft_c);
3147 sav->lft_c = NULL;
3148 }
3149 if (sav->lft_h != NULL) {
3150 KFREE(sav->lft_h);
3151 sav->lft_h = NULL;
3152 }
3153 if (sav->lft_s != NULL) {
3154 KFREE(sav->lft_s);
3155 sav->lft_s = NULL;
3156 }
3157
3158 return error;
3159 }
3160
3161 /*
3162 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3163 * OUT: 0: valid
3164 * other: errno
3165 */
3166 static int
3167 key_mature(struct secasvar *sav)
3168 {
3169 int mature;
3170 int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3171 int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3172
3173 mature = 0;
3174
3175 /* check SPI value */
3176 switch (sav->sah->saidx.proto) {
3177 case IPPROTO_ESP:
3178 case IPPROTO_AH:
3179 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3180 ipseclog((LOG_DEBUG,
3181 "key_mature: illegal range of SPI %u.\n",
3182 (u_int32_t)ntohl(sav->spi)));
3183 return EINVAL;
3184 }
3185 break;
3186 }
3187
3188 /* check satype */
3189 switch (sav->sah->saidx.proto) {
3190 case IPPROTO_ESP:
3191 /* check flags */
3192 if ((sav->flags & SADB_X_EXT_OLD)
3193 && (sav->flags & SADB_X_EXT_DERIV)) {
3194 ipseclog((LOG_DEBUG, "key_mature: "
3195 "invalid flag (derived) given to old-esp.\n"));
3196 return EINVAL;
3197 }
3198 if (sav->alg_auth == SADB_AALG_NONE)
3199 checkmask = 1;
3200 else
3201 checkmask = 3;
3202 mustmask = 1;
3203 break;
3204 case IPPROTO_AH:
3205 /* check flags */
3206 if (sav->flags & SADB_X_EXT_DERIV) {
3207 ipseclog((LOG_DEBUG, "key_mature: "
3208 "invalid flag (derived) given to AH SA.\n"));
3209 return EINVAL;
3210 }
3211 if (sav->alg_enc != SADB_EALG_NONE) {
3212 ipseclog((LOG_DEBUG, "key_mature: "
3213 "protocol and algorithm mismated.\n"));
3214 return(EINVAL);
3215 }
3216 checkmask = 2;
3217 mustmask = 2;
3218 break;
3219 case IPPROTO_IPCOMP:
3220 if (sav->alg_auth != SADB_AALG_NONE) {
3221 ipseclog((LOG_DEBUG, "key_mature: "
3222 "protocol and algorithm mismated.\n"));
3223 return(EINVAL);
3224 }
3225 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3226 && ntohl(sav->spi) >= 0x10000) {
3227 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3228 return(EINVAL);
3229 }
3230 checkmask = 4;
3231 mustmask = 4;
3232 break;
3233 case IPPROTO_TCP:
3234 if (sav->alg_auth != SADB_X_AALG_TCP_MD5) {
3235 ipseclog((LOG_DEBUG, "key_mature: "
3236 "protocol and algorithm mismated.\n"));
3237 return(EINVAL);
3238 }
3239 checkmask = 0;
3240 mustmask = 0;
3241 break;
3242 default:
3243 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3244 return EPROTONOSUPPORT;
3245 }
3246
3247 /* check authentication algorithm */
3248 if ((checkmask & 2) != 0) {
3249 const struct ah_algorithm *algo;
3250 int keylen;
3251
3252 algo = ah_algorithm_lookup(sav->alg_auth);
3253 if (!algo) {
3254 ipseclog((LOG_DEBUG,"key_mature: "
3255 "unknown authentication algorithm.\n"));
3256 return EINVAL;
3257 }
3258
3259 /* algorithm-dependent check */
3260 if (sav->key_auth)
3261 keylen = sav->key_auth->sadb_key_bits;
3262 else
3263 keylen = 0;
3264 if (keylen < algo->keymin || algo->keymax < keylen) {
3265 ipseclog((LOG_DEBUG,
3266 "key_mature: invalid AH key length %d "
3267 "(%d-%d allowed)\n",
3268 keylen, algo->keymin, algo->keymax));
3269 return EINVAL;
3270 }
3271
3272 if (algo->mature) {
3273 if ((*algo->mature)(sav)) {
3274 /* message generated in per-algorithm function*/
3275 return EINVAL;
3276 } else
3277 mature = SADB_SATYPE_AH;
3278 }
3279
3280 if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) {
3281 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n"));
3282 return EINVAL;
3283 }
3284 }
3285
3286 /* check encryption algorithm */
3287 if ((checkmask & 1) != 0) {
3288 #ifdef IPSEC_ESP
3289 const struct esp_algorithm *algo;
3290 int keylen;
3291
3292 algo = esp_algorithm_lookup(sav->alg_enc);
3293 if (!algo) {
3294 ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n"));
3295 return EINVAL;
3296 }
3297
3298 /* algorithm-dependent check */
3299 if (sav->key_enc)
3300 keylen = sav->key_enc->sadb_key_bits;
3301 else
3302 keylen = 0;
3303 if (keylen < algo->keymin || algo->keymax < keylen) {
3304 ipseclog((LOG_DEBUG,
3305 "key_mature: invalid ESP key length %d "
3306 "(%d-%d allowed)\n",
3307 keylen, algo->keymin, algo->keymax));
3308 return EINVAL;
3309 }
3310
3311 if (algo->mature) {
3312 if ((*algo->mature)(sav)) {
3313 /* message generated in per-algorithm function*/
3314 return EINVAL;
3315 } else
3316 mature = SADB_SATYPE_ESP;
3317 }
3318
3319 if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) {
3320 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n"));
3321 return EINVAL;
3322 }
3323 #else /*IPSEC_ESP*/
3324 ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n"));
3325 return EINVAL;
3326 #endif
3327 }
3328
3329 /* check compression algorithm */
3330 if ((checkmask & 4) != 0) {
3331 const struct ipcomp_algorithm *algo;
3332
3333 /* algorithm-dependent check */
3334 algo = ipcomp_algorithm_lookup(sav->alg_enc);
3335 if (!algo) {
3336 ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n"));
3337 return EINVAL;
3338 }
3339 }
3340
3341 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3342
3343 return 0;
3344 }
3345
3346 /*
3347 * subroutine for SADB_GET and SADB_DUMP.
3348 */
3349 static struct mbuf *
3350 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3351 u_int32_t seq, u_int32_t pid)
3352 {
3353 struct mbuf *result = NULL, *tres = NULL, *m;
3354 int l = 0;
3355 int i;
3356 void *p;
3357 int dumporder[] = {
3358 SADB_EXT_SA, SADB_X_EXT_SA2,
3359 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3360 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3361 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3362 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3363 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3364 };
3365
3366 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3367 if (m == NULL)
3368 goto fail;
3369 result = m;
3370
3371 for (i = NELEM(dumporder) - 1; i >= 0; i--) {
3372 m = NULL;
3373 p = NULL;
3374 switch (dumporder[i]) {
3375 case SADB_EXT_SA:
3376 m = key_setsadbsa(sav);
3377 if (!m)
3378 goto fail;
3379 break;
3380
3381 case SADB_X_EXT_SA2:
3382 m = key_setsadbxsa2(sav->sah->saidx.mode,
3383 sav->replay ? sav->replay->count : 0,
3384 sav->sah->saidx.reqid);
3385 if (!m)
3386 goto fail;
3387 break;
3388
3389 case SADB_EXT_ADDRESS_SRC:
3390 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3391 (struct sockaddr *)&sav->sah->saidx.src,
3392 FULLMASK, IPSEC_ULPROTO_ANY);
3393 if (!m)
3394 goto fail;
3395 break;
3396
3397 case SADB_EXT_ADDRESS_DST:
3398 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3399 (struct sockaddr *)&sav->sah->saidx.dst,
3400 FULLMASK, IPSEC_ULPROTO_ANY);
3401 if (!m)
3402 goto fail;
3403 break;
3404
3405 case SADB_EXT_KEY_AUTH:
3406 if (!sav->key_auth)
3407 continue;
3408 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3409 p = sav->key_auth;
3410 break;
3411
3412 case SADB_EXT_KEY_ENCRYPT:
3413 if (!sav->key_enc)
3414 continue;
3415 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3416 p = sav->key_enc;
3417 break;
3418
3419 case SADB_EXT_LIFETIME_CURRENT:
3420 if (!sav->lft_c)
3421 continue;
3422 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3423 p = sav->lft_c;
3424 break;
3425
3426 case SADB_EXT_LIFETIME_HARD:
3427 if (!sav->lft_h)
3428 continue;
3429 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3430 p = sav->lft_h;
3431 break;
3432
3433 case SADB_EXT_LIFETIME_SOFT:
3434 if (!sav->lft_s)
3435 continue;
3436 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3437 p = sav->lft_s;
3438 break;
3439
3440 case SADB_EXT_ADDRESS_PROXY:
3441 case SADB_EXT_IDENTITY_SRC:
3442 case SADB_EXT_IDENTITY_DST:
3443 /* XXX: should we brought from SPD ? */
3444 case SADB_EXT_SENSITIVITY:
3445 default:
3446 continue;
3447 }
3448
3449 if ((!m && !p) || (m && p))
3450 goto fail;
3451 if (p && tres) {
3452 M_PREPEND(tres, l, M_NOWAIT);
3453 if (!tres)
3454 goto fail;
3455 bcopy(p, mtod(tres, caddr_t), l);
3456 continue;
3457 }
3458 if (p) {
3459 m = key_alloc_mbuf(l);
3460 if (!m)
3461 goto fail;
3462 m_copyback(m, 0, l, p);
3463 }
3464
3465 if (tres)
3466 m_cat(m, tres);
3467 tres = m;
3468 }
3469
3470 m_cat(result, tres);
3471
3472 if (result->m_len < sizeof(struct sadb_msg)) {
3473 result = m_pullup(result, sizeof(struct sadb_msg));
3474 if (result == NULL)
3475 goto fail;
3476 }
3477
3478 result->m_pkthdr.len = 0;
3479 for (m = result; m; m = m->m_next)
3480 result->m_pkthdr.len += m->m_len;
3481
3482 mtod(result, struct sadb_msg *)->sadb_msg_len =
3483 PFKEY_UNIT64(result->m_pkthdr.len);
3484
3485 return result;
3486
3487 fail:
3488 m_freem(result);
3489 m_freem(tres);
3490 return NULL;
3491 }
3492
3493 /*
3494 * set data into sadb_msg.
3495 */
3496 static struct mbuf *
3497 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype,
3498 u_int32_t seq, pid_t pid, u_int16_t reserved)
3499 {
3500 struct mbuf *m;
3501 struct sadb_msg *p;
3502 int len;
3503
3504 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3505 if (len > MCLBYTES)
3506 return NULL;
3507 MGETHDR(m, M_NOWAIT, MT_DATA);
3508 if (m && len > MHLEN) {
3509 MCLGET(m, M_NOWAIT);
3510 if ((m->m_flags & M_EXT) == 0) {
3511 m_freem(m);
3512 m = NULL;
3513 }
3514 }
3515 if (!m)
3516 return NULL;
3517 m->m_pkthdr.len = m->m_len = len;
3518 m->m_next = NULL;
3519
3520 p = mtod(m, struct sadb_msg *);
3521
3522 bzero(p, len);
3523 p->sadb_msg_version = PF_KEY_V2;
3524 p->sadb_msg_type = type;
3525 p->sadb_msg_errno = 0;
3526 p->sadb_msg_satype = satype;
3527 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3528 p->sadb_msg_reserved = reserved;
3529 p->sadb_msg_seq = seq;
3530 p->sadb_msg_pid = (u_int32_t)pid;
3531
3532 return m;
3533 }
3534
3535 /*
3536 * copy secasvar data into sadb_address.
3537 */
3538 static struct mbuf *
3539 key_setsadbsa(struct secasvar *sav)
3540 {
3541 struct mbuf *m;
3542 struct sadb_sa *p;
3543 int len;
3544
3545 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3546 m = key_alloc_mbuf(len);
3547 if (!m || m->m_next) { /*XXX*/
3548 if (m)
3549 m_freem(m);
3550 return NULL;
3551 }
3552
3553 p = mtod(m, struct sadb_sa *);
3554
3555 bzero(p, len);
3556 p->sadb_sa_len = PFKEY_UNIT64(len);
3557 p->sadb_sa_exttype = SADB_EXT_SA;
3558 p->sadb_sa_spi = sav->spi;
3559 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3560 p->sadb_sa_state = sav->state;
3561 p->sadb_sa_auth = sav->alg_auth;
3562 p->sadb_sa_encrypt = sav->alg_enc;
3563 p->sadb_sa_flags = sav->flags;
3564
3565 return m;
3566 }
3567
3568 /*
3569 * set data into sadb_address.
3570 */
3571 static struct mbuf *
3572 key_setsadbaddr(u_int16_t exttype, struct sockaddr *saddr,
3573 u_int8_t prefixlen, u_int16_t ul_proto)
3574 {
3575 struct mbuf *m;
3576 struct sadb_address *p;
3577 size_t len;
3578
3579 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3580 PFKEY_ALIGN8(saddr->sa_len);
3581 m = key_alloc_mbuf(len);
3582 if (!m || m->m_next) { /*XXX*/
3583 if (m)
3584 m_freem(m);
3585 return NULL;
3586 }
3587
3588 p = mtod(m, struct sadb_address *);
3589
3590 bzero(p, len);
3591 p->sadb_address_len = PFKEY_UNIT64(len);
3592 p->sadb_address_exttype = exttype;
3593 p->sadb_address_proto = ul_proto;
3594 if (prefixlen == FULLMASK) {
3595 switch (saddr->sa_family) {
3596 case AF_INET:
3597 prefixlen = sizeof(struct in_addr) << 3;
3598 break;
3599 case AF_INET6:
3600 prefixlen = sizeof(struct in6_addr) << 3;
3601 break;
3602 default:
3603 ; /*XXX*/
3604 }
3605 }
3606 p->sadb_address_prefixlen = prefixlen;
3607 p->sadb_address_reserved = 0;
3608
3609 bcopy(saddr,
3610 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3611 saddr->sa_len);
3612
3613 return m;
3614 }
3615
3616 #if 0
3617 /*
3618 * set data into sadb_ident.
3619 */
3620 static struct mbuf *
3621 key_setsadbident(u_int16_t exttype, u_int16_t idtype, caddr_t string,
3622 int stringlen, u_int64_t id)
3623 {
3624 struct mbuf *m;
3625 struct sadb_ident *p;
3626 size_t len;
3627
3628 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3629 m = key_alloc_mbuf(len);
3630 if (!m || m->m_next) { /*XXX*/
3631 if (m)
3632 m_freem(m);
3633 return NULL;
3634 }
3635
3636 p = mtod(m, struct sadb_ident *);
3637
3638 bzero(p, len);
3639 p->sadb_ident_len = PFKEY_UNIT64(len);
3640 p->sadb_ident_exttype = exttype;
3641 p->sadb_ident_type = idtype;
3642 p->sadb_ident_reserved = 0;
3643 p->sadb_ident_id = id;
3644
3645 bcopy(string,
3646 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3647 stringlen);
3648
3649 return m;
3650 }
3651 #endif
3652
3653 /*
3654 * set data into sadb_x_sa2.
3655 */
3656 static struct mbuf *
3657 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3658 {
3659 struct mbuf *m;
3660 struct sadb_x_sa2 *p;
3661 size_t len;
3662
3663 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3664 m = key_alloc_mbuf(len);
3665 if (!m || m->m_next) { /*XXX*/
3666 if (m)
3667 m_freem(m);
3668 return NULL;
3669 }
3670
3671 p = mtod(m, struct sadb_x_sa2 *);
3672
3673 bzero(p, len);
3674 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3675 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3676 p->sadb_x_sa2_mode = mode;
3677 p->sadb_x_sa2_reserved1 = 0;
3678 p->sadb_x_sa2_reserved2 = 0;
3679 p->sadb_x_sa2_sequence = seq;
3680 p->sadb_x_sa2_reqid = reqid;
3681
3682 return m;
3683 }
3684
3685 /*
3686 * set data into sadb_x_policy
3687 */
3688 static struct mbuf *
3689 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
3690 {
3691 struct mbuf *m;
3692 struct sadb_x_policy *p;
3693 size_t len;
3694
3695 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3696 m = key_alloc_mbuf(len);
3697 if (!m || m->m_next) { /*XXX*/
3698 if (m)
3699 m_freem(m);
3700 return NULL;
3701 }
3702
3703 p = mtod(m, struct sadb_x_policy *);
3704
3705 bzero(p, len);
3706 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3707 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3708 p->sadb_x_policy_type = type;
3709 p->sadb_x_policy_dir = dir;
3710 p->sadb_x_policy_id = id;
3711
3712 return m;
3713 }
3714
3715 /* %%% utilities */
3716 /*
3717 * copy a buffer into the new buffer allocated.
3718 */
3719 static void *
3720 key_newbuf(const void *src, u_int len)
3721 {
3722 caddr_t new;
3723
3724 KMALLOC(new, caddr_t, len);
3725 if (new == NULL) {
3726 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3727 return NULL;
3728 }
3729 bcopy(src, new, len);
3730
3731 return new;
3732 }
3733
3734 /* compare my own address
3735 * OUT: 1: true, i.e. my address.
3736 * 0: false
3737 */
3738 int
3739 key_ismyaddr(struct sockaddr *sa)
3740 {
3741 #ifdef INET
3742 struct sockaddr_in *sin;
3743 struct in_ifaddr_container *iac;
3744 #endif
3745 int res;
3746
3747 /* sanity check */
3748 if (sa == NULL)
3749 panic("key_ismyaddr: NULL pointer is passed.");
3750
3751 lwkt_gettoken(&key_token);
3752 switch (sa->sa_family) {
3753 #ifdef INET
3754 case AF_INET:
3755 sin = (struct sockaddr_in *)sa;
3756 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
3757 struct in_ifaddr *ia = iac->ia;
3758
3759 if (sin->sin_family == ia->ia_addr.sin_family &&
3760 sin->sin_len == ia->ia_addr.sin_len &&
3761 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3762 {
3763 lwkt_reltoken(&key_token);
3764 return 1;
3765 }
3766 }
3767 res = 0;
3768 break;
3769 #endif
3770 #ifdef INET6
3771 case AF_INET6:
3772 res = key_ismyaddr6((struct sockaddr_in6 *)sa);
3773 break;
3774 #endif
3775 default:
3776 res = 0;
3777 break;
3778 }
3779 lwkt_reltoken(&key_token);
3780 return res;
3781 }
3782
3783 #ifdef INET6
3784 /*
3785 * compare my own address for IPv6.
3786 * 1: ours
3787 * 0: other
3788 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3789 */
3790 static int
3791 key_ismyaddr6(struct sockaddr_in6 *sin6)
3792 {
3793 struct in6_ifaddr *ia;
3794 struct in6_multi *in6m;
3795
3796 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3797 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3798 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3799 return 1;
3800
3801 /*
3802 * XXX Multicast
3803 * XXX why do we care about multlicast here while we don't care
3804 * about IPv4 multicast??
3805 * XXX scope
3806 */
3807 in6m = IN6_LOOKUP_MULTI(&sin6->sin6_addr, ia->ia_ifp);
3808 if (in6m)
3809 return 1;
3810 }
3811
3812 /* loopback, just for safety */
3813 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3814 return 1;
3815
3816 return 0;
3817 }
3818 #endif /*INET6*/
3819
3820 /*
3821 * compare two secasindex structure.
3822 * flag can specify to compare 2 saidxes.
3823 * compare two secasindex structure without both mode and reqid.
3824 * don't compare port.
3825 * IN:
3826 * saidx0: source, it can be in SAD.
3827 * saidx1: object.
3828 * OUT:
3829 * 1 : equal
3830 * 0 : not equal
3831 */
3832 static int
3833 key_cmpsaidx(struct secasindex *saidx0, struct secasindex *saidx1,
3834 int flag)
3835 {
3836 /* sanity */
3837 if (saidx0 == NULL && saidx1 == NULL)
3838 return 1;
3839
3840 if (saidx0 == NULL || saidx1 == NULL)
3841 return 0;
3842
3843 if (saidx0->proto != saidx1->proto)
3844 return 0;
3845
3846 if (flag == CMP_EXACTLY) {
3847 if (saidx0->mode != saidx1->mode)
3848 return 0;
3849 if (saidx0->reqid != saidx1->reqid)
3850 return 0;
3851 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 ||
3852 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0)
3853 return 0;
3854 } else {
3855
3856 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3857 if (flag == CMP_MODE_REQID
3858 ||flag == CMP_REQID) {
3859 /*
3860 * If reqid of SPD is non-zero, unique SA is required.
3861 * The result must be of same reqid in this case.
3862 */
3863 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3864 return 0;
3865 }
3866
3867 if (flag == CMP_MODE_REQID) {
3868 if (saidx0->mode != IPSEC_MODE_ANY
3869 && saidx0->mode != saidx1->mode)
3870 return 0;
3871 }
3872
3873 if (key_sockaddrcmp((struct sockaddr *)&saidx0->src,
3874 (struct sockaddr *)&saidx1->src, 0) != 0) {
3875 return 0;
3876 }
3877 if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst,
3878 (struct sockaddr *)&saidx1->dst, 0) != 0) {
3879 return 0;
3880 }
3881 }
3882
3883 return 1;
3884 }
3885
3886 /*
3887 * compare two secindex structure exactly.
3888 * IN:
3889 * spidx0: source, it is often in SPD.
3890 * spidx1: object, it is often from PFKEY message.
3891 * OUT:
3892 * 1 : equal
3893 * 0 : not equal
3894 */
3895 static int
3896 key_cmpspidx_exactly(struct secpolicyindex *spidx0,
3897 struct secpolicyindex *spidx1)
3898 {
3899 /* sanity */
3900 if (spidx0 == NULL && spidx1 == NULL)
3901 return 1;
3902
3903 if (spidx0 == NULL || spidx1 == NULL)
3904 return 0;
3905
3906 if (spidx0->prefs != spidx1->prefs
3907 || spidx0->prefd != spidx1->prefd
3908 || spidx0->ul_proto != spidx1->ul_proto)
3909 return 0;
3910
3911 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src,
3912 (struct sockaddr *)&spidx1->src, 1) != 0) {
3913 return 0;
3914 }
3915 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst,
3916 (struct sockaddr *)&spidx1->dst, 1) != 0) {
3917 return 0;
3918 }
3919
3920 return 1;
3921 }
3922
3923 /*
3924 * compare two secindex structure with mask.
3925 * IN:
3926 * spidx0: source, it is often in SPD.
3927 * spidx1: object, it is often from IP header.
3928 * OUT:
3929 * 1 : equal
3930 * 0 : not equal
3931 */
3932 static int
3933 key_cmpspidx_withmask(struct secpolicyindex *spidx0,
3934 struct secpolicyindex *spidx1)
3935 {
3936 /* sanity */
3937 if (spidx0 == NULL && spidx1 == NULL)
3938 return 1;
3939
3940 if (spidx0 == NULL || spidx1 == NULL)
3941 return 0;
3942
3943 if (spidx0->src.ss_family != spidx1->src.ss_family ||
3944 spidx0->dst.ss_family != spidx1->dst.ss_family ||
3945 spidx0->src.ss_len != spidx1->src.ss_len ||
3946 spidx0->dst.ss_len != spidx1->dst.ss_len)
3947 return 0;
3948
3949 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3950 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3951 && spidx0->ul_proto != spidx1->ul_proto)
3952 return 0;
3953
3954 switch (spidx0->src.ss_family) {
3955 case AF_INET:
3956 if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
3957 && satosin(&spidx0->src)->sin_port !=
3958 satosin(&spidx1->src)->sin_port)
3959 return 0;
3960 if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr,
3961 (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs))
3962 return 0;
3963 break;
3964 case AF_INET6:
3965 if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
3966 && satosin6(&spidx0->src)->sin6_port !=
3967 satosin6(&spidx1->src)->sin6_port)
3968 return 0;
3969 /*
3970 * scope_id check. if sin6_scope_id is 0, we regard it
3971 * as a wildcard scope, which matches any scope zone ID.
3972 */
3973 if (satosin6(&spidx0->src)->sin6_scope_id &&
3974 satosin6(&spidx1->src)->sin6_scope_id &&
3975 satosin6(&spidx0->src)->sin6_scope_id !=
3976 satosin6(&spidx1->src)->sin6_scope_id)
3977 return 0;
3978 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr,
3979 (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs))
3980 return 0;
3981 break;
3982 default:
3983 /* XXX */
3984 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0)
3985 return 0;
3986 break;
3987 }
3988
3989 switch (spidx0->dst.ss_family) {
3990 case AF_INET:
3991 if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY
3992 && satosin(&spidx0->dst)->sin_port !=
3993 satosin(&spidx1->dst)->sin_port)
3994 return 0;
3995 if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr,
3996 (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd))
3997 return 0;
3998 break;
3999 case AF_INET6:
4000 if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY
4001 && satosin6(&spidx0->dst)->sin6_port !=
4002 satosin6(&spidx1->dst)->sin6_port)
4003 return 0;
4004 /*
4005 * scope_id check. if sin6_scope_id is 0, we regard it
4006 * as a wildcard scope, which matches any scope zone ID.
4007 */
4008 if (satosin6(&spidx0->src)->sin6_scope_id &&
4009 satosin6(&spidx1->src)->sin6_scope_id &&
4010 satosin6(&spidx0->dst)->sin6_scope_id !=
4011 satosin6(&spidx1->dst)->sin6_scope_id)
4012 return 0;
4013 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->dst)->sin6_addr,
4014 (caddr_t)&satosin6(&spidx1->dst)->sin6_addr, spidx0->prefd))
4015 return 0;
4016 break;
4017 default:
4018 /* XXX */
4019 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0)
4020 return 0;
4021 break;
4022 }
4023
4024 /* XXX Do we check other field ? e.g. flowinfo */
4025
4026 return 1;
4027 }
4028
4029 /* returns 0 on match */
4030 static int
4031 key_sockaddrcmp(struct sockaddr *sa1, struct sockaddr *sa2, int port)
4032 {
4033 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4034 return 1;
4035
4036 switch (sa1->sa_family) {
4037 case AF_INET:
4038 if (sa1->sa_len != sizeof(struct sockaddr_in))
4039 return 1;
4040 if (satosin(sa1)->sin_addr.s_addr !=
4041 satosin(sa2)->sin_addr.s_addr) {
4042 return 1;
4043 }
4044 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4045 return 1;
4046 break;
4047 case AF_INET6:
4048 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4049 return 1; /*EINVAL*/
4050 if (satosin6(sa1)->sin6_scope_id !=
4051 satosin6(sa2)->sin6_scope_id) {
4052 return 1;
4053 }
4054 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4055 &satosin6(sa2)->sin6_addr)) {
4056 return 1;
4057 }
4058 if (port &&
4059 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4060 return 1;
4061 }
4062 default:
4063 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4064 return 1;
4065 break;
4066 }
4067
4068 return 0;
4069 }
4070
4071 /*
4072 * compare two buffers with mask.
4073 * IN:
4074 * addr1: source
4075 * addr2: object
4076 * bits: Number of bits to compare
4077 * OUT:
4078 * 1 : equal
4079 * 0 : not equal
4080 */
4081 static int
4082 key_bbcmp(caddr_t p1, caddr_t p2, u_int bits)
4083 {
4084 u_int8_t mask;
4085
4086 /* XXX: This could be considerably faster if we compare a word
4087 * at a time, but it is complicated on LSB Endian machines */
4088
4089 /* Handle null pointers */
4090 if (p1 == NULL || p2 == NULL)
4091 return (p1 == p2);
4092
4093 while (bits >= 8) {
4094 if (*p1++ != *p2++)
4095 return 0;
4096 bits -= 8;
4097 }
4098
4099 if (bits > 0) {
4100 mask = ~((1<<(8-bits))-1);
4101 if ((*p1 & mask) != (*p2 & mask))
4102 return 0;
4103 }
4104 return 1; /* Match! */
4105 }
4106
4107 /*
4108 * time handler.
4109 * scanning SPD and SAD to check status for each entries,
4110 * and do to remove or to expire.
4111 * XXX: year 2038 problem may remain.
4112 */
4113 void
4114 key_timehandler(void *__dummy)
4115 {
4116 u_int dir;
4117 struct timeval tv;
4118
4119 microtime(&tv);
4120
4121 lwkt_gettoken(&key_token);
4122
4123 /* SPD */
4124 {
4125 struct secpolicy *sp, *nextsp;
4126
4127 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4128 for (sp = LIST_FIRST(&sptree[dir]);
4129 sp != NULL;
4130 sp = nextsp) {
4131
4132 nextsp = LIST_NEXT(sp, chain);
4133
4134 if (sp->state == IPSEC_SPSTATE_DEAD) {
4135 key_freesp(sp);
4136 continue;
4137 }
4138
4139 if (sp->lifetime == 0 && sp->validtime == 0)
4140 continue;
4141
4142 /* the deletion will occur next time */
4143 if ((sp->lifetime
4144 && tv.tv_sec - sp->created > sp->lifetime)
4145 || (sp->validtime
4146 && tv.tv_sec - sp->lastused > sp->validtime)) {
4147 sp->state = IPSEC_SPSTATE_DEAD;
4148 key_spdexpire(sp);
4149 continue;
4150 }
4151 }
4152 }
4153 }
4154
4155 /* SAD */
4156 {
4157 struct secashead *sah, *nextsah;
4158 struct secasvar *sav, *nextsav;
4159
4160 for (sah = LIST_FIRST(&sahtree);
4161 sah != NULL;
4162 sah = nextsah) {
4163
4164 nextsah = LIST_NEXT(sah, chain);
4165
4166 /* if sah has been dead, then delete it and process next sah. */
4167 if (sah->state == SADB_SASTATE_DEAD) {
4168 key_delsah(sah);
4169 continue;
4170 }
4171
4172 /* if LARVAL entry doesn't become MATURE, delete it. */
4173 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
4174 sav != NULL;
4175 sav = nextsav) {
4176
4177 nextsav = LIST_NEXT(sav, chain);
4178
4179 if (tv.tv_sec - sav->created > key_larval_lifetime) {
4180 key_freesav(sav);
4181 }
4182 }
4183
4184 /*
4185 * check MATURE entry to start to send expire message
4186 * whether or not.
4187 */
4188 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
4189 sav != NULL;
4190 sav = nextsav) {
4191
4192 nextsav = LIST_NEXT(sav, chain);
4193
4194 /* we don't need to check. */
4195 if (sav->lft_s == NULL)
4196 continue;
4197
4198 /* sanity check */
4199 if (sav->lft_c == NULL) {
4200 ipseclog((LOG_DEBUG,"key_timehandler: "
4201 "There is no CURRENT time, why?\n"));
4202 continue;
4203 }
4204
4205 /* check SOFT lifetime */
4206 if (sav->lft_s->sadb_lifetime_addtime != 0
4207 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4208 /*
4209 * check the SA if it has been used.
4210 * when it hasn't been used, delete it.
4211 * i don't think such SA will be used.
4212 */
4213 if (sav->lft_c->sadb_lifetime_usetime == 0) {
4214 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4215 key_freesav(sav);
4216 sav = NULL;
4217 } else {
4218 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4219 /*
4220 * XXX If we keep to send expire
4221 * message in the status of
4222 * DYING. Do remove below code.
4223 */
4224 key_expire(sav);
4225 }
4226 }
4227
4228 /* check SOFT lifetime by bytes */
4229 /*
4230 * XXX I don't know the way to delete this SA
4231 * when new SA is installed. Caution when it's
4232 * installed too big lifetime by time.
4233 */
4234 else if (sav->lft_s->sadb_lifetime_bytes != 0
4235 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4236
4237 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4238 /*
4239 * XXX If we keep to send expire
4240 * message in the status of
4241 * DYING. Do remove below code.
4242 */
4243 key_expire(sav);
4244 }
4245 }
4246
4247 /* check DYING entry to change status to DEAD. */
4248 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
4249 sav != NULL;
4250 sav = nextsav) {
4251
4252 nextsav = LIST_NEXT(sav, chain);
4253
4254 /* we don't need to check. */
4255 if (sav->lft_h == NULL)
4256 continue;
4257
4258 /* sanity check */
4259 if (sav->lft_c == NULL) {
4260 ipseclog((LOG_DEBUG, "key_timehandler: "
4261 "There is no CURRENT time, why?\n"));
4262 continue;
4263 }
4264
4265 if (sav->lft_h->sadb_lifetime_addtime != 0
4266 && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) {
4267 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4268 key_freesav(sav);
4269 sav = NULL;
4270 }
4271 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4272 else if (sav->lft_s != NULL
4273 && sav->lft_s->sadb_lifetime_addtime != 0
4274 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4275 /*
4276 * XXX: should be checked to be
4277 * installed the valid SA.
4278 */
4279
4280 /*
4281 * If there is no SA then sending
4282 * expire message.
4283 */
4284 key_expire(sav);
4285 }
4286 #endif
4287 /* check HARD lifetime by bytes */
4288 else if (sav->lft_h->sadb_lifetime_bytes != 0
4289 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4290 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4291 key_freesav(sav);
4292 sav = NULL;
4293 }
4294 }
4295
4296 /* delete entry in DEAD */
4297 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
4298 sav != NULL;
4299 sav = nextsav) {
4300
4301 nextsav = LIST_NEXT(sav, chain);
4302
4303 /* sanity check */
4304 if (sav->state != SADB_SASTATE_DEAD) {
4305 ipseclog((LOG_DEBUG, "key_timehandler: "
4306 "invalid sav->state "
4307 "(queue: %d SA: %d): "
4308 "kill it anyway\n",
4309 SADB_SASTATE_DEAD, sav->state));
4310 }
4311
4312 /*
4313 * do not call key_freesav() here.
4314 * sav should already be freed, and sav->refcnt
4315 * shows other references to sav
4316 * (such as from SPD).
4317 */
4318 }
4319 }
4320 }
4321
4322 #ifndef IPSEC_NONBLOCK_ACQUIRE
4323 /* ACQ tree */
4324 {
4325 struct secacq *acq, *nextacq;
4326
4327 for (acq = LIST_FIRST(&acqtree);
4328 acq != NULL;
4329 acq = nextacq) {
4330
4331 nextacq = LIST_NEXT(acq, chain);
4332
4333 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4334 && __LIST_CHAINED(acq)) {
4335 LIST_REMOVE(acq, chain);
4336 KFREE(acq);
4337 }
4338 }
4339 }
4340 #endif
4341
4342 /* SP ACQ tree */
4343 {
4344 struct secspacq *acq, *nextacq;
4345
4346 for (acq = LIST_FIRST(&spacqtree);
4347 acq != NULL;
4348 acq = nextacq) {
4349
4350 nextacq = LIST_NEXT(acq, chain);
4351
4352 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4353 && __LIST_CHAINED(acq)) {
4354 LIST_REMOVE(acq, chain);
4355 KFREE(acq);
4356 }
4357 }
4358 }
4359
4360 /* initialize random seed */
4361 if (key_tick_init_random++ > key_int_random) {
4362 key_tick_init_random = 0;
4363 key_srandom();
4364 }
4365
4366 #ifndef IPSEC_DEBUG2
4367 /* do exchange to tick time !! */
4368 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
4369 #endif /* IPSEC_DEBUG2 */
4370
4371 lwkt_reltoken(&key_token);
4372 return;
4373 }
4374
4375 /*
4376 * to initialize a seed for random()
4377 */
4378 static void
4379 key_srandom(void)
4380 {
4381 struct timeval tv;
4382
4383 microtime(&tv);
4384
4385 skrandom(tv.tv_usec);
4386
4387 return;
4388 }
4389
4390 u_long
4391 key_random(void)
4392 {
4393 u_long value;
4394
4395 key_randomfill(&value, sizeof(value));
4396 return value;
4397 }
4398
4399 void
4400 key_randomfill(void *p, size_t l)
4401 {
4402 size_t n;
4403 u_long v;
4404 static int warn = 1;
4405
4406 n = 0;
4407 n = (size_t)read_random(p, (u_int)l);
4408 /* last resort */
4409 while (n < l) {
4410 v = krandom();
4411 bcopy(&v, (u_int8_t *)p + n,
4412 l - n < sizeof(v) ? l - n : sizeof(v));
4413 n += sizeof(v);
4414
4415 if (warn) {
4416 kprintf("WARNING: pseudo-random number generator "
4417 "used for IPsec processing\n");
4418 warn = 0;
4419 }
4420 }
4421 }
4422
4423 /*
4424 * map SADB_SATYPE_* to IPPROTO_*.
4425 * if satype == SADB_SATYPE then satype is mapped to ~0.
4426 * OUT:
4427 * 0: invalid satype.
4428 */
4429 static u_int16_t
4430 key_satype2proto(u_int8_t satype)
4431 {
4432 switch (satype) {
4433 case SADB_SATYPE_UNSPEC:
4434 return IPSEC_PROTO_ANY;
4435 case SADB_SATYPE_AH:
4436 return IPPROTO_AH;
4437 case SADB_SATYPE_ESP:
4438 return IPPROTO_ESP;
4439 case SADB_X_SATYPE_IPCOMP:
4440 return IPPROTO_IPCOMP;
4441 case SADB_X_SATYPE_TCPSIGNATURE:
4442 return IPPROTO_TCP;
4443 break;
4444 default:
4445 return 0;
4446 }
4447 /* NOTREACHED */
4448 }
4449
4450 /*
4451 * map IPPROTO_* to SADB_SATYPE_*
4452 * OUT:
4453 * 0: invalid protocol type.
4454 */
4455 static u_int8_t
4456 key_proto2satype(u_int16_t proto)
4457 {
4458 switch (proto) {
4459 case IPPROTO_AH:
4460 return SADB_SATYPE_AH;
4461 case IPPROTO_ESP:
4462 return SADB_SATYPE_ESP;
4463 case IPPROTO_IPCOMP:
4464 return SADB_X_SATYPE_IPCOMP;
4465 case IPPROTO_TCP:
4466 return SADB_X_SATYPE_TCPSIGNATURE;
4467 break;
4468 default:
4469 return 0;
4470 }
4471 /* NOTREACHED */
4472 }
4473
4474 /* %%% PF_KEY */
4475 /*
4476 * SADB_GETSPI processing is to receive
4477 * <base, (SA2), src address, dst address, (SPI range)>
4478 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4479 * tree with the status of LARVAL, and send
4480 * <base, SA(*), address(SD)>
4481 * to the IKMPd.
4482 *
4483 * IN: mhp: pointer to the pointer to each header.
4484 * OUT: NULL if fail.
4485 * other if success, return pointer to the message to send.
4486 */
4487 static int
4488 key_getspi(struct socket *so, struct mbuf *m,
4489 const struct sadb_msghdr *mhp)
4490 {
4491 struct sadb_address *src0, *dst0;
4492 struct secasindex saidx;
4493 struct secashead *newsah;
4494 struct secasvar *newsav;
4495 u_int8_t proto;
4496 u_int32_t spi;
4497 u_int8_t mode;
4498 u_int32_t reqid;
4499 int error;
4500
4501 /* sanity check */
4502 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4503 panic("key_getspi: NULL pointer is passed.");
4504
4505 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4506 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4507 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4508 return key_senderror(so, m, EINVAL);
4509 }
4510 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4511 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4512 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4513 return key_senderror(so, m, EINVAL);
4514 }
4515 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4516 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4517 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4518 } else {
4519 mode = IPSEC_MODE_ANY;
4520 reqid = 0;
4521 }
4522
4523 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4524 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4525
4526 /* map satype to proto */
4527 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4528 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
4529 return key_senderror(so, m, EINVAL);
4530 }
4531
4532 /* make sure if port number is zero. */
4533 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
4534 case AF_INET:
4535 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4536 sizeof(struct sockaddr_in))
4537 return key_senderror(so, m, EINVAL);
4538 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
4539 break;
4540 case AF_INET6:
4541 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4542 sizeof(struct sockaddr_in6))
4543 return key_senderror(so, m, EINVAL);
4544 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
4545 break;
4546 default:
4547 ; /*???*/
4548 }
4549 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
4550 case AF_INET:
4551 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4552 sizeof(struct sockaddr_in))
4553 return key_senderror(so, m, EINVAL);
4554 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
4555 break;
4556 case AF_INET6:
4557 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4558 sizeof(struct sockaddr_in6))
4559 return key_senderror(so, m, EINVAL);
4560 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
4561 break;
4562 default:
4563 ; /*???*/
4564 }
4565
4566 /* XXX boundary check against sa_len */
4567 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4568
4569 /* SPI allocation */
4570 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4571 &saidx);
4572 if (spi == 0)
4573 return key_senderror(so, m, EINVAL);
4574
4575 /* get a SA index */
4576 if ((newsah = key_getsah(&saidx)) == NULL) {
4577 /* create a new SA index */
4578 if ((newsah = key_newsah(&saidx)) == NULL) {
4579 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
4580 return key_senderror(so, m, ENOBUFS);
4581 }
4582 }
4583
4584 /* get a new SA */
4585 /* XXX rewrite */
4586 newsav = key_newsav(m, mhp, newsah, &error);
4587 if (newsav == NULL) {
4588 /* XXX don't free new SA index allocated in above. */
4589 return key_senderror(so, m, error);
4590 }
4591
4592 /* set spi */
4593 newsav->spi = htonl(spi);
4594
4595 #ifndef IPSEC_NONBLOCK_ACQUIRE
4596 /* delete the entry in acqtree */
4597 if (mhp->msg->sadb_msg_seq != 0) {
4598 struct secacq *acq;
4599 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4600 /* reset counter in order to deletion by timehandler. */
4601 struct timeval tv;
4602 microtime(&tv);
4603 acq->created = tv.tv_sec;
4604 acq->count = 0;
4605 }
4606 }
4607 #endif
4608
4609 {
4610 struct mbuf *n, *nn;
4611 struct sadb_sa *m_sa;
4612 struct sadb_msg *newmsg;
4613 int off, len;
4614
4615 /* create new sadb_msg to reply. */
4616 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4617 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4618 if (len > MCLBYTES)
4619 return key_senderror(so, m, ENOBUFS);
4620
4621 MGETHDR(n, M_NOWAIT, MT_DATA);
4622 if (len > MHLEN) {
4623 MCLGET(n, M_NOWAIT);
4624 if ((n->m_flags & M_EXT) == 0) {
4625 m_freem(n);
4626 n = NULL;
4627 }
4628 }
4629 if (!n)
4630 return key_senderror(so, m, ENOBUFS);
4631
4632 n->m_len = len;
4633 n->m_next = NULL;
4634 off = 0;
4635
4636 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4637 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4638
4639 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4640 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4641 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4642 m_sa->sadb_sa_spi = htonl(spi);
4643 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4644
4645 #ifdef DIAGNOSTIC
4646 if (off != len)
4647 panic("length inconsistency in key_getspi");
4648 #endif
4649
4650 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4651 SADB_EXT_ADDRESS_DST);
4652 if (!n->m_next) {
4653 m_freem(n);
4654 return key_senderror(so, m, ENOBUFS);
4655 }
4656
4657 if (n->m_len < sizeof(struct sadb_msg)) {
4658 n = m_pullup(n, sizeof(struct sadb_msg));
4659 if (n == NULL)
4660 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4661 }
4662
4663 n->m_pkthdr.len = 0;
4664 for (nn = n; nn; nn = nn->m_next)
4665 n->m_pkthdr.len += nn->m_len;
4666
4667 newmsg = mtod(n, struct sadb_msg *);
4668 newmsg->sadb_msg_seq = newsav->seq;
4669 newmsg->sadb_msg_errno = 0;
4670 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4671
4672 m_freem(m);
4673 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4674 }
4675 }
4676
4677 /*
4678 * allocating new SPI
4679 * called by key_getspi().
4680 * OUT:
4681 * 0: failure.
4682 * others: success.
4683 */
4684 static u_int32_t
4685 key_do_getnewspi(struct sadb_spirange *spirange,
4686 struct secasindex *saidx)
4687 {
4688 u_int32_t newspi;
4689 u_int32_t min, max;
4690 int count = key_spi_trycnt;
4691
4692 /* set spi range to allocate */
4693 if (spirange != NULL) {
4694 min = spirange->sadb_spirange_min;
4695 max = spirange->sadb_spirange_max;
4696 } else {
4697 min = key_spi_minval;
4698 max = key_spi_maxval;
4699 }
4700 /* IPCOMP needs 2-byte SPI */
4701 if (saidx->proto == IPPROTO_IPCOMP) {
4702 u_int32_t t;
4703 if (min >= 0x10000)
4704 min = 0xffff;
4705 if (max >= 0x10000)
4706 max = 0xffff;
4707 if (min > max) {
4708 t = min; min = max; max = t;
4709 }
4710 }
4711
4712 if (min == max) {
4713 if (key_checkspidup(saidx, min) != NULL) {
4714 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min));
4715 return 0;
4716 }
4717
4718 count--; /* taking one cost. */
4719 newspi = min;
4720
4721 } else {
4722
4723 /* init SPI */
4724 newspi = 0;
4725
4726 /* when requesting to allocate spi ranged */
4727 while (count--) {
4728 /* generate pseudo-random SPI value ranged. */
4729 newspi = min + (key_random() % (max - min + 1));
4730
4731 if (key_checkspidup(saidx, newspi) == NULL)
4732 break;
4733 }
4734
4735 if (count == 0 || newspi == 0) {
4736 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
4737 return 0;
4738 }
4739 }
4740
4741 /* statistics */
4742 keystat.getspi_count =
4743 (keystat.getspi_count + key_spi_trycnt - count) / 2;
4744
4745 return newspi;
4746 }
4747
4748 /*
4749 * SADB_UPDATE processing
4750 * receive
4751 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4752 * key(AE), (identity(SD),) (sensitivity)>
4753 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
4754 * and send
4755 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4756 * (identity(SD),) (sensitivity)>
4757 * to the ikmpd.
4758 *
4759 * m will always be freed.
4760 */
4761 static int
4762 key_update(struct socket *so, struct mbuf *m,
4763 const struct sadb_msghdr *mhp)
4764 {
4765 struct sadb_sa *sa0;
4766 struct sadb_address *src0, *dst0;
4767 struct secasindex saidx;
4768 struct secashead *sah;
4769 struct secasvar *sav;
4770 u_int16_t proto;
4771 u_int8_t mode;
4772 u_int32_t reqid;
4773 int error;
4774
4775 /* sanity check */
4776 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4777 panic("key_update: NULL pointer is passed.");
4778
4779 /* map satype to proto */
4780 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4781 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
4782 return key_senderror(so, m, EINVAL);
4783 }
4784
4785 if (mhp->ext[SADB_EXT_SA] == NULL ||
4786 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4787 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4788 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4789 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4790 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4791 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4792 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4793 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4794 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4795 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4796 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4797 return key_senderror(so, m, EINVAL);
4798 }
4799 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4800 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4801 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4802 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4803 return key_senderror(so, m, EINVAL);
4804 }
4805 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4806 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4807 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4808 } else {
4809 mode = IPSEC_MODE_ANY;
4810 reqid = 0;
4811 }
4812 /* XXX boundary checking for other extensions */
4813
4814 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4815 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4816 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4817
4818 /* XXX boundary check against sa_len */
4819 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4820
4821 /* get a SA header */
4822 if ((sah = key_getsah(&saidx)) == NULL) {
4823 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
4824 return key_senderror(so, m, ENOENT);
4825 }
4826
4827 /* set spidx if there */
4828 /* XXX rewrite */
4829 error = key_setident(sah, m, mhp);
4830 if (error)
4831 return key_senderror(so, m, error);
4832
4833 /* find a SA with sequence number. */
4834 #ifdef IPSEC_DOSEQCHECK
4835 if (mhp->msg->sadb_msg_seq != 0
4836 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
4837 ipseclog((LOG_DEBUG,
4838 "key_update: no larval SA with sequence %u exists.\n",
4839 mhp->msg->sadb_msg_seq));
4840 return key_senderror(so, m, ENOENT);
4841 }
4842 #else
4843 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
4844 ipseclog((LOG_DEBUG,
4845 "key_update: no such a SA found (spi:%u)\n",
4846 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4847 return key_senderror(so, m, EINVAL);
4848 }
4849 #endif
4850
4851 /* validity check */
4852 if (sav->sah->saidx.proto != proto) {
4853 ipseclog((LOG_DEBUG,
4854 "key_update: protocol mismatched (DB=%u param=%u)\n",
4855 sav->sah->saidx.proto, proto));
4856 return key_senderror(so, m, EINVAL);
4857 }
4858 #ifdef IPSEC_DOSEQCHECK
4859 if (sav->spi != sa0->sadb_sa_spi) {
4860 ipseclog((LOG_DEBUG,
4861 "key_update: SPI mismatched (DB:%u param:%u)\n",
4862 (u_int32_t)ntohl(sav->spi),
4863 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4864 return key_senderror(so, m, EINVAL);
4865 }
4866 #endif
4867 if (sav->pid != mhp->msg->sadb_msg_pid) {
4868 ipseclog((LOG_DEBUG,
4869 "key_update: pid mismatched (DB:%u param:%u)\n",
4870 sav->pid, mhp->msg->sadb_msg_pid));
4871 return key_senderror(so, m, EINVAL);
4872 }
4873
4874 /* copy sav values */
4875 error = key_setsaval(sav, m, mhp);
4876 if (error) {
4877 key_freesav(sav);
4878 return key_senderror(so, m, error);
4879 }
4880
4881 /* check SA values to be mature. */
4882 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
4883 key_freesav(sav);
4884 return key_senderror(so, m, 0);
4885 }
4886
4887 {
4888 struct mbuf *n;
4889
4890 /* set msg buf from mhp */
4891 n = key_getmsgbuf_x1(m, mhp);
4892 if (n == NULL) {
4893 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
4894 return key_senderror(so, m, ENOBUFS);
4895 }
4896
4897 m_freem(m);
4898 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
4899 }
4900 }
4901
4902 /*
4903 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
4904 * only called by key_update().
4905 * OUT:
4906 * NULL : not found
4907 * others : found, pointer to a SA.
4908 */
4909 #ifdef IPSEC_DOSEQCHECK
4910 static struct secasvar *
4911 key_getsavbyseq(struct secashead *sah, u_int32_t seq)
4912 {
4913 struct secasvar *sav;
4914 u_int state;
4915
4916 state = SADB_SASTATE_LARVAL;
4917
4918 /* search SAD with sequence number ? */
4919 LIST_FOREACH(sav, &sah->savtree[state], chain) {
4920
4921 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
4922
4923 if (sav->seq == seq) {
4924 sav->refcnt++;
4925 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
4926 kprintf("DP key_getsavbyseq cause "
4927 "refcnt++:%d SA:%p\n",
4928 sav->refcnt, sav));
4929 return sav;
4930 }
4931 }
4932
4933 return NULL;
4934 }
4935 #endif
4936
4937 /*
4938 * SADB_ADD processing
4939 * add a entry to SA database, when received
4940 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4941 * key(AE), (identity(SD),) (sensitivity)>
4942 * from the ikmpd,
4943 * and send
4944 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4945 * (identity(SD),) (sensitivity)>
4946 * to the ikmpd.
4947 *
4948 * IGNORE identity and sensitivity messages.
4949 *
4950 * m will always be freed.
4951 */
4952 static int
4953 key_add(struct socket *so, struct mbuf *m,
4954 const struct sadb_msghdr *mhp)
4955 {
4956 struct sadb_sa *sa0;
4957 struct sadb_address *src0, *dst0;
4958 struct secasindex saidx;
4959 struct secashead *newsah;
4960 struct secasvar *newsav;
4961 u_int16_t proto;
4962 u_int8_t mode;
4963 u_int32_t reqid;
4964 int error;
4965
4966 /* sanity check */
4967 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4968 panic("key_add: NULL pointer is passed.");
4969
4970 /* map satype to proto */
4971 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4972 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
4973 return key_senderror(so, m, EINVAL);
4974 }
4975
4976 if (mhp->ext[SADB_EXT_SA] == NULL ||
4977 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4978 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4979 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4980 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4981 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4982 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4983 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4984 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4985 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4986 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4987 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4988 return key_senderror(so, m, EINVAL);
4989 }
4990 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4991 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4992 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4993 /* XXX need more */
4994 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4995 return key_senderror(so, m, EINVAL);
4996 }
4997 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4998 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4999 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5000 } else {
5001 mode = IPSEC_MODE_ANY;
5002 reqid = 0;
5003 }
5004
5005 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5006 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5007 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5008
5009 /* XXX boundary check against sa_len */
5010 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
5011
5012 /* get a SA header */
5013 if ((newsah = key_getsah(&saidx)) == NULL) {
5014 /* create a new SA header */
5015 if ((newsah = key_newsah(&saidx)) == NULL) {
5016 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
5017 return key_senderror(so, m, ENOBUFS);
5018 }
5019 }
5020
5021 /* set spidx if there */
5022 /* XXX rewrite */
5023 error = key_setident(newsah, m, mhp);
5024 if (error) {
5025 return key_senderror(so, m, error);
5026 }
5027
5028 /* create new SA entry. */
5029 /* We can create new SA only if SPI is differenct. */
5030 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
5031 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
5032 return key_senderror(so, m, EEXIST);
5033 }
5034 newsav = key_newsav(m, mhp, newsah, &error);
5035 if (newsav == NULL) {
5036 return key_senderror(so, m, error);
5037 }
5038
5039 /* check SA values to be mature. */
5040 if ((error = key_mature(newsav)) != 0) {
5041 key_freesav(newsav);
5042 return key_senderror(so, m, error);
5043 }
5044
5045 /*
5046 * don't call key_freesav() here, as we would like to keep the SA
5047 * in the database on success.
5048 */
5049
5050 {
5051 struct mbuf *n;
5052
5053 /* set msg buf from mhp */
5054 n = key_getmsgbuf_x1(m, mhp);
5055 if (n == NULL) {
5056 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
5057 return key_senderror(so, m, ENOBUFS);
5058 }
5059
5060 m_freem(m);
5061 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5062 }
5063 }
5064
5065 /* m is retained */
5066 static int
5067 key_setident(struct secashead *sah, struct mbuf *m,
5068 const struct sadb_msghdr *mhp)
5069 {
5070 const struct sadb_ident *idsrc, *iddst;
5071 int idsrclen, iddstlen;
5072
5073 /* sanity check */
5074 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5075 panic("key_setident: NULL pointer is passed.");
5076
5077 /* don't make buffer if not there */
5078 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
5079 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5080 sah->idents = NULL;
5081 sah->identd = NULL;
5082 return 0;
5083 }
5084
5085 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
5086 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5087 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
5088 return EINVAL;
5089 }
5090
5091 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5092 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5093 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5094 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5095
5096 /* validity check */
5097 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5098 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
5099 return EINVAL;
5100 }
5101
5102 switch (idsrc->sadb_ident_type) {
5103 case SADB_IDENTTYPE_PREFIX:
5104 case SADB_IDENTTYPE_FQDN:
5105 case SADB_IDENTTYPE_USERFQDN:
5106 default:
5107 /* XXX do nothing */
5108 sah->idents = NULL;
5109 sah->identd = NULL;
5110 return 0;
5111 }
5112
5113 /* make structure */
5114 KMALLOC(sah->idents, struct sadb_ident *, idsrclen);
5115 if (sah->idents == NULL) {
5116 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5117 return ENOBUFS;
5118 }
5119 KMALLOC(sah->identd, struct sadb_ident *, iddstlen);
5120 if (sah->identd == NULL) {
5121 KFREE(sah->idents);
5122 sah->idents = NULL;
5123 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5124 return ENOBUFS;
5125 }
5126 bcopy(idsrc, sah->idents, idsrclen);
5127 bcopy(iddst, sah->identd, iddstlen);
5128
5129 return 0;
5130 }
5131
5132 /*
5133 * m will not be freed on return.
5134 * it is caller's responsibility to free the result.
5135 */
5136 static struct mbuf *
5137 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5138 {
5139 struct mbuf *n;
5140
5141 /* sanity check */
5142 if (m == NULL || mhp == NULL || mhp->msg == NULL)
5143 panic("key_getmsgbuf_x1: NULL pointer is passed.");
5144
5145 /* create new sadb_msg to reply. */
5146 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5147 SADB_EXT_SA, SADB_X_EXT_SA2,
5148 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5149 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5150 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5151 if (!n)
5152 return NULL;
5153
5154 if (n->m_len < sizeof(struct sadb_msg)) {
5155 n = m_pullup(n, sizeof(struct sadb_msg));
5156 if (n == NULL)
5157 return NULL;
5158 }
5159 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5160 mtod(n, struct sadb_msg *)->sadb_msg_len =
5161 PFKEY_UNIT64(n->m_pkthdr.len);
5162
5163 return n;
5164 }
5165
5166 static int key_delete_all (struct socket *, struct mbuf *,
5167 const struct sadb_msghdr *, u_int16_t);
5168
5169 /*
5170 * SADB_DELETE processing
5171 * receive
5172 * <base, SA(*), address(SD)>
5173 * from the ikmpd, and set SADB_SASTATE_DEAD,
5174 * and send,
5175 * <base, SA(*), address(SD)>
5176 * to the ikmpd.
5177 *
5178 * m will always be freed.
5179 */
5180 static int
5181 key_delete(struct socket *so, struct mbuf *m,
5182 const struct sadb_msghdr *mhp)
5183 {
5184 struct sadb_sa *sa0;
5185 struct sadb_address *src0, *dst0;
5186 struct secasindex saidx;
5187 struct secashead *sah;
5188 struct secasvar *sav = NULL;
5189 u_int16_t proto;
5190
5191 /* sanity check */
5192 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5193 panic("key_delete: NULL pointer is passed.");
5194
5195 /* map satype to proto */
5196 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5197 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
5198 return key_senderror(so, m, EINVAL);
5199 }
5200
5201 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5202 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5203 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5204 return key_senderror(so, m, EINVAL);
5205 }
5206
5207 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5208 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5209 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5210 return key_senderror(so, m, EINVAL);
5211 }
5212
5213 if (mhp->ext[SADB_EXT_SA] == NULL) {
5214 /*
5215 * Caller wants us to delete all non-LARVAL SAs
5216 * that match the src/dst. This is used during
5217 * IKE INITIAL-CONTACT.
5218 */
5219 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
5220 return key_delete_all(so, m, mhp, proto);
5221 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5222 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5223 return key_senderror(so, m, EINVAL);
5224 }
5225
5226 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5227 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5228 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5229
5230 /* XXX boundary check against sa_len */
5231 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5232
5233 /* get a SA header */
5234 LIST_FOREACH(sah, &sahtree, chain) {
5235 if (sah->state == SADB_SASTATE_DEAD)
5236 continue;
5237 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5238 continue;
5239
5240 /* get a SA with SPI. */
5241 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5242 if (sav)
5243 break;
5244 }
5245 if (sah == NULL) {
5246 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
5247 return key_senderror(so, m, ENOENT);
5248 }
5249
5250 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5251 key_freesav(sav);
5252 sav = NULL;
5253
5254 {
5255 struct mbuf *n;
5256 struct sadb_msg *newmsg;
5257
5258 /* create new sadb_msg to reply. */
5259 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5260 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5261 if (!n)
5262 return key_senderror(so, m, ENOBUFS);
5263
5264 if (n->m_len < sizeof(struct sadb_msg)) {
5265 n = m_pullup(n, sizeof(struct sadb_msg));
5266 if (n == NULL)
5267 return key_senderror(so, m, ENOBUFS);
5268 }
5269 newmsg = mtod(n, struct sadb_msg *);
5270 newmsg->sadb_msg_errno = 0;
5271 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5272
5273 m_freem(m);
5274 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5275 }
5276 }
5277
5278 /*
5279 * delete all SAs for src/dst. Called from key_delete().
5280 */
5281 static int
5282 key_delete_all(struct socket *so, struct mbuf *m,
5283 const struct sadb_msghdr *mhp, u_int16_t proto)
5284 {
5285 struct sadb_address *src0, *dst0;
5286 struct secasindex saidx;
5287 struct secashead *sah;
5288 struct secasvar *sav, *nextsav;
5289 u_int stateidx, state;
5290
5291 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5292 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5293
5294 /* XXX boundary check against sa_len */
5295 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5296
5297 LIST_FOREACH(sah, &sahtree, chain) {
5298 if (sah->state == SADB_SASTATE_DEAD)
5299 continue;
5300 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5301 continue;
5302
5303 /* Delete all non-LARVAL SAs. */
5304 for (stateidx = 0;
5305 stateidx < NELEM(saorder_state_alive);
5306 stateidx++) {
5307 state = saorder_state_alive[stateidx];
5308 if (state == SADB_SASTATE_LARVAL)
5309 continue;
5310 for (sav = LIST_FIRST(&sah->savtree[state]);
5311 sav != NULL; sav = nextsav) {
5312 nextsav = LIST_NEXT(sav, chain);
5313 /* sanity check */
5314 if (sav->state != state) {
5315 ipseclog((LOG_DEBUG, "key_delete_all: "
5316 "invalid sav->state "
5317 "(queue: %d SA: %d)\n",
5318 state, sav->state));
5319 continue;
5320 }
5321
5322 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5323 key_freesav(sav);
5324 }
5325 }
5326 }
5327 {
5328 struct mbuf *n;
5329 struct sadb_msg *newmsg;
5330
5331 /* create new sadb_msg to reply. */
5332 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5333 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5334 if (!n)
5335 return key_senderror(so, m, ENOBUFS);
5336
5337 if (n->m_len < sizeof(struct sadb_msg)) {
5338 n = m_pullup(n, sizeof(struct sadb_msg));
5339 if (n == NULL)
5340 return key_senderror(so, m, ENOBUFS);
5341 }
5342 newmsg = mtod(n, struct sadb_msg *);
5343 newmsg->sadb_msg_errno = 0;
5344 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5345
5346 m_freem(m);
5347 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5348 }
5349 }
5350
5351 /*
5352 * SADB_GET processing
5353 * receive
5354 * <base, SA(*), address(SD)>
5355 * from the ikmpd, and get a SP and a SA to respond,
5356 * and send,
5357 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5358 * (identity(SD),) (sensitivity)>
5359 * to the ikmpd.
5360 *
5361 * m will always be freed.
5362 */
5363 static int
5364 key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5365 {
5366 struct sadb_sa *sa0;
5367 struct sadb_address *src0, *dst0;
5368 struct secasindex saidx;
5369 struct secashead *sah;
5370 struct secasvar *sav = NULL;
5371 u_int16_t proto;
5372
5373 /* sanity check */
5374 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5375 panic("key_get: NULL pointer is passed.");
5376
5377 /* map satype to proto */
5378 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5379 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
5380 return key_senderror(so, m, EINVAL);
5381 }
5382
5383 if (mhp->ext[SADB_EXT_SA] == NULL ||
5384 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5385 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5386 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5387 return key_senderror(so, m, EINVAL);
5388 }
5389 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5390 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5391 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5392 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5393 return key_senderror(so, m, EINVAL);
5394 }
5395
5396 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5397 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5398 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5399
5400 /* XXX boundary check against sa_len */
5401 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5402
5403 /* get a SA header */
5404 LIST_FOREACH(sah, &sahtree, chain) {
5405 if (sah->state == SADB_SASTATE_DEAD)
5406 continue;
5407 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5408 continue;
5409
5410 /* get a SA with SPI. */
5411 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5412 if (sav)
5413 break;
5414 }
5415 if (sah == NULL) {
5416 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
5417 return key_senderror(so, m, ENOENT);
5418 }
5419
5420 {
5421 struct mbuf *n;
5422 u_int8_t satype;
5423
5424 /* map proto to satype */
5425 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5426 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
5427 return key_senderror(so, m, EINVAL);
5428 }
5429
5430 /* create new sadb_msg to reply. */
5431 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5432 mhp->msg->sadb_msg_pid);
5433 if (!n)
5434 return key_senderror(so, m, ENOBUFS);
5435
5436 m_freem(m);
5437 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5438 }
5439 }
5440
5441 /* XXX make it sysctl-configurable? */
5442 static void
5443 key_getcomb_setlifetime(struct sadb_comb *comb)
5444 {
5445
5446 comb->sadb_comb_soft_allocations = 1;
5447 comb->sadb_comb_hard_allocations = 1;
5448 comb->sadb_comb_soft_bytes = 0;
5449 comb->sadb_comb_hard_bytes = 0;
5450 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5451 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5452 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5453 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5454 }
5455
5456 #ifdef IPSEC_ESP
5457 /*
5458 * XXX reorder combinations by preference
5459 * XXX no idea if the user wants ESP authentication or not
5460 */
5461 static struct mbuf *
5462 key_getcomb_esp(void)
5463 {
5464 struct sadb_comb *comb;
5465 const struct esp_algorithm *algo;
5466 struct mbuf *result = NULL, *m, *n;
5467 int encmin;
5468 int i, off, o;
5469 int totlen;
5470 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5471
5472 m = NULL;
5473 for (i = 1; i <= SADB_EALG_MAX; i++) {
5474 algo = esp_algorithm_lookup(i);
5475 if (!algo)
5476 continue;
5477
5478 if (algo->keymax < ipsec_esp_keymin)
5479 continue;
5480 if (algo->keymin < ipsec_esp_keymin)
5481 encmin = ipsec_esp_keymin;
5482 else
5483 encmin = algo->keymin;
5484
5485 if (ipsec_esp_auth)
5486 m = key_getcomb_ah();
5487 else {
5488 #ifdef DIAGNOSTIC
5489 if (l > MLEN)
5490 panic("assumption failed in key_getcomb_esp");
5491 #endif
5492 MGET(m, M_NOWAIT, MT_DATA);
5493 if (m) {
5494 M_ALIGN(m, l);
5495 m->m_len = l;
5496 m->m_next = NULL;
5497 bzero(mtod(m, caddr_t), m->m_len);
5498 }
5499 }
5500 if (!m)
5501 goto fail;
5502
5503 totlen = 0;
5504 for (n = m; n; n = n->m_next)
5505 totlen += n->m_len;
5506 #ifdef DIAGNOSTIC
5507 if (totlen % l)
5508 panic("assumption failed in key_getcomb_esp");
5509 #endif
5510
5511 for (off = 0; off < totlen; off += l) {
5512 n = m_pulldown(m, off, l, &o);
5513 if (!n) {
5514 /* m is already freed */
5515 goto fail;
5516 }
5517 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
5518 bzero(comb, sizeof(*comb));
5519 key_getcomb_setlifetime(comb);
5520 comb->sadb_comb_encrypt = i;
5521 comb->sadb_comb_encrypt_minbits = encmin;
5522 comb->sadb_comb_encrypt_maxbits = algo->keymax;
5523 }
5524
5525 if (!result)
5526 result = m;
5527 else
5528 m_cat(result, m);
5529 }
5530
5531 return result;
5532
5533 fail:
5534 if (result)
5535 m_freem(result);
5536 return NULL;
5537 }
5538 #endif
5539
5540 /*
5541 * XXX reorder combinations by preference
5542 */
5543 static struct mbuf *
5544 key_getcomb_ah(void)
5545 {
5546 struct sadb_comb *comb;
5547 const struct ah_algorithm *algo;
5548 struct mbuf *m;
5549 int min;
5550 int i;
5551 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5552
5553 m = NULL;
5554 for (i = 1; i <= SADB_AALG_MAX; i++) {
5555 #if 1
5556 /* we prefer HMAC algorithms, not old algorithms */
5557 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
5558 continue;
5559 #endif
5560 algo = ah_algorithm_lookup(i);
5561 if (!algo)
5562 continue;
5563
5564 if (algo->keymax < ipsec_ah_keymin)
5565 continue;
5566 if (algo->keymin < ipsec_ah_keymin)
5567 min = ipsec_ah_keymin;
5568 else
5569 min = algo->keymin;
5570
5571 if (!m) {
5572 #ifdef DIAGNOSTIC
5573 if (l > MLEN)
5574 panic("assumption failed in key_getcomb_ah");
5575 #endif
5576 MGET(m, M_NOWAIT, MT_DATA);
5577 if (m) {
5578 M_ALIGN(m, l);
5579 m->m_len = l;
5580 m->m_next = NULL;
5581 }
5582 } else
5583 M_PREPEND(m, l, M_NOWAIT);
5584 if (!m)
5585 return NULL;
5586
5587 comb = mtod(m, struct sadb_comb *);
5588 bzero(comb, sizeof(*comb));
5589 key_getcomb_setlifetime(comb);
5590 comb->sadb_comb_auth = i;
5591 comb->sadb_comb_auth_minbits = min;
5592 comb->sadb_comb_auth_maxbits = algo->keymax;
5593 }
5594
5595 return m;
5596 }
5597
5598 /*
5599 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
5600 * XXX reorder combinations by preference
5601 */
5602 static struct mbuf *
5603 key_getcomb_ipcomp(void)
5604 {
5605 struct sadb_comb *comb;
5606 const struct ipcomp_algorithm *algo;
5607 struct mbuf *m;
5608 int i;
5609 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5610
5611 m = NULL;
5612 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
5613 algo = ipcomp_algorithm_lookup(i);
5614 if (!algo)
5615 continue;
5616
5617 if (!m) {
5618 #ifdef DIAGNOSTIC
5619 if (l > MLEN)
5620 panic("assumption failed in key_getcomb_ipcomp");
5621 #endif
5622 MGET(m, M_NOWAIT, MT_DATA);
5623 if (m) {
5624 M_ALIGN(m, l);
5625 m->m_len = l;
5626 m->m_next = NULL;
5627 }
5628 } else
5629 M_PREPEND(m, l, M_NOWAIT);
5630 if (!m)
5631 return NULL;
5632
5633 comb = mtod(m, struct sadb_comb *);
5634 bzero(comb, sizeof(*comb));
5635 key_getcomb_setlifetime(comb);
5636 comb->sadb_comb_encrypt = i;
5637 /* what should we set into sadb_comb_*_{min,max}bits? */
5638 }
5639
5640 return m;
5641 }
5642
5643 /*
5644 * XXX no way to pass mode (transport/tunnel) to userland
5645 * XXX replay checking?
5646 * XXX sysctl interface to ipsec_{ah,esp}_keymin
5647 */
5648 static struct mbuf *
5649 key_getprop(const struct secasindex *saidx)
5650 {
5651 struct sadb_prop *prop;
5652 struct mbuf *m, *n;
5653 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
5654 int totlen;
5655
5656 switch (saidx->proto) {
5657 #ifdef IPSEC_ESP
5658 case IPPROTO_ESP:
5659 m = key_getcomb_esp();
5660 break;
5661 #endif
5662 case IPPROTO_AH:
5663 m = key_getcomb_ah();
5664 break;
5665 case IPPROTO_IPCOMP:
5666 m = key_getcomb_ipcomp();
5667 break;
5668 default:
5669 return NULL;
5670 }
5671
5672 if (!m)
5673 return NULL;
5674 M_PREPEND(m, l, M_NOWAIT);
5675 if (!m)
5676 return NULL;
5677
5678 totlen = 0;
5679 for (n = m; n; n = n->m_next)
5680 totlen += n->m_len;
5681
5682 prop = mtod(m, struct sadb_prop *);
5683 bzero(prop, sizeof(*prop));
5684 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
5685 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
5686 prop->sadb_prop_replay = 32; /* XXX */
5687
5688 return m;
5689 }
5690
5691 /*
5692 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
5693 * send
5694 * <base, SA, address(SD), (address(P)), x_policy,
5695 * (identity(SD),) (sensitivity,) proposal>
5696 * to KMD, and expect to receive
5697 * <base> with SADB_ACQUIRE if error occured,
5698 * or
5699 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
5700 * from KMD by PF_KEY.
5701 *
5702 * XXX x_policy is outside of RFC2367 (KAME extension).
5703 * XXX sensitivity is not supported.
5704 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
5705 * see comment for key_getcomb_ipcomp().
5706 *
5707 * OUT:
5708 * 0 : succeed
5709 * others: error number
5710 */
5711 static int
5712 key_acquire(struct secasindex *saidx, struct secpolicy *sp)
5713 {
5714 struct mbuf *result = NULL, *m;
5715 #ifndef IPSEC_NONBLOCK_ACQUIRE
5716 struct secacq *newacq;
5717 #endif
5718 u_int8_t satype;
5719 int error = -1;
5720 u_int32_t seq;
5721
5722 /* sanity check */
5723 if (saidx == NULL)
5724 panic("key_acquire: NULL pointer is passed.");
5725 if ((satype = key_proto2satype(saidx->proto)) == 0)
5726 panic("key_acquire: invalid proto is passed.");
5727
5728 #ifndef IPSEC_NONBLOCK_ACQUIRE
5729 /*
5730 * We never do anything about acquirng SA. There is anather
5731 * solution that kernel blocks to send SADB_ACQUIRE message until
5732 * getting something message from IKEd. In later case, to be
5733 * managed with ACQUIRING list.
5734 */
5735 /* get a entry to check whether sending message or not. */
5736 if ((newacq = key_getacq(saidx)) != NULL) {
5737 if (key_blockacq_count < newacq->count) {
5738 /* reset counter and do send message. */
5739 newacq->count = 0;
5740 } else {
5741 /* increment counter and do nothing. */
5742 newacq->count++;
5743 return 0;
5744 }
5745 } else {
5746 /* make new entry for blocking to send SADB_ACQUIRE. */
5747 if ((newacq = key_newacq(saidx)) == NULL)
5748 return ENOBUFS;
5749
5750 /* add to acqtree */
5751 LIST_INSERT_HEAD(&acqtree, newacq, chain);
5752 }
5753 #endif
5754
5755
5756 #ifndef IPSEC_NONBLOCK_ACQUIRE
5757 seq = newacq->seq;
5758 #else
5759 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
5760 #endif
5761 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
5762 if (!m) {
5763 error = ENOBUFS;
5764 goto fail;
5765 }
5766 result = m;
5767
5768 /* set sadb_address for saidx's. */
5769 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
5770 (struct sockaddr *)&saidx->src, FULLMASK, IPSEC_ULPROTO_ANY);
5771 if (!m) {
5772 error = ENOBUFS;
5773 goto fail;
5774 }
5775 m_cat(result, m);
5776
5777 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
5778 (struct sockaddr *)&saidx->dst, FULLMASK, IPSEC_ULPROTO_ANY);
5779 if (!m) {
5780 error = ENOBUFS;
5781 goto fail;
5782 }
5783 m_cat(result, m);
5784
5785 /* XXX proxy address (optional) */
5786
5787 /* set sadb_x_policy */
5788 if (sp) {
5789 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
5790 if (!m) {
5791 error = ENOBUFS;
5792 goto fail;
5793 }
5794 m_cat(result, m);
5795 }
5796
5797 /* XXX identity (optional) */
5798 #if 0
5799 if (idexttype && fqdn) {
5800 /* create identity extension (FQDN) */
5801 struct sadb_ident *id;
5802 int fqdnlen;
5803
5804 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
5805 id = (struct sadb_ident *)p;
5806 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5807 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5808 id->sadb_ident_exttype = idexttype;
5809 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
5810 bcopy(fqdn, id + 1, fqdnlen);
5811 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
5812 }
5813
5814 if (idexttype) {
5815 /* create identity extension (USERFQDN) */
5816 struct sadb_ident *id;
5817 int userfqdnlen;
5818
5819 if (userfqdn) {
5820 /* +1 for terminating-NUL */
5821 userfqdnlen = strlen(userfqdn) + 1;
5822 } else
5823 userfqdnlen = 0;
5824 id = (struct sadb_ident *)p;
5825 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5826 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5827 id->sadb_ident_exttype = idexttype;
5828 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
5829 /* XXX is it correct? */
5830 if (curproc && curproc->p_cred)
5831 id->sadb_ident_id = curproc->p_cred->p_ruid;
5832 if (userfqdn && userfqdnlen)
5833 bcopy(userfqdn, id + 1, userfqdnlen);
5834 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
5835 }
5836 #endif
5837
5838 /* XXX sensitivity (optional) */
5839
5840 /* create proposal/combination extension */
5841 m = key_getprop(saidx);
5842 #if 0
5843 /*
5844 * spec conformant: always attach proposal/combination extension,
5845 * the problem is that we have no way to attach it for ipcomp,
5846 * due to the way sadb_comb is declared in RFC2367.
5847 */
5848 if (!m) {
5849 error = ENOBUFS;
5850 goto fail;
5851 }
5852 m_cat(result, m);
5853 #else
5854 /*
5855 * outside of spec; make proposal/combination extension optional.
5856 */
5857 if (m)
5858 m_cat(result, m);
5859 #endif
5860
5861 if ((result->m_flags & M_PKTHDR) == 0) {
5862 error = EINVAL;
5863 goto fail;
5864 }
5865
5866 if (result->m_len < sizeof(struct sadb_msg)) {
5867 result = m_pullup(result, sizeof(struct sadb_msg));
5868 if (result == NULL) {
5869 error = ENOBUFS;
5870 goto fail;
5871 }
5872 }
5873
5874 result->m_pkthdr.len = 0;
5875 for (m = result; m; m = m->m_next)
5876 result->m_pkthdr.len += m->m_len;
5877
5878 mtod(result, struct sadb_msg *)->sadb_msg_len =
5879 PFKEY_UNIT64(result->m_pkthdr.len);
5880
5881 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
5882
5883 fail:
5884 if (result)
5885 m_freem(result);
5886 return error;
5887 }
5888
5889 #ifndef IPSEC_NONBLOCK_ACQUIRE
5890 static struct secacq *
5891 key_newacq(struct secasindex *saidx)
5892 {
5893 struct secacq *newacq;
5894 struct timeval tv;
5895
5896 /* get new entry */
5897 KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
5898 if (newacq == NULL) {
5899 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
5900 return NULL;
5901 }
5902 bzero(newacq, sizeof(*newacq));
5903
5904 /* copy secindex */
5905 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
5906 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
5907 microtime(&tv);
5908 newacq->created = tv.tv_sec;
5909 newacq->count = 0;
5910
5911 return newacq;
5912 }
5913
5914 static struct secacq *
5915 key_getacq(struct secasindex *saidx)
5916 {
5917 struct secacq *acq;
5918
5919 LIST_FOREACH(acq, &acqtree, chain) {
5920 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
5921 return acq;
5922 }
5923
5924 return NULL;
5925 }
5926
5927 static struct secacq *
5928 key_getacqbyseq(u_int32_t seq)
5929 {
5930 struct secacq *acq;
5931
5932 LIST_FOREACH(acq, &acqtree, chain) {
5933 if (acq->seq == seq)
5934 return acq;
5935 }
5936
5937 return NULL;
5938 }
5939 #endif
5940
5941 static struct secspacq *
5942 key_newspacq(struct secpolicyindex *spidx)
5943 {
5944 struct secspacq *acq;
5945 struct timeval tv;
5946
5947 /* get new entry */
5948 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq));
5949 if (acq == NULL) {
5950 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
5951 return NULL;
5952 }
5953 bzero(acq, sizeof(*acq));
5954
5955 /* copy secindex */
5956 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
5957 microtime(&tv);
5958 acq->created = tv.tv_sec;
5959 acq->count = 0;
5960
5961 return acq;
5962 }
5963
5964 static struct secspacq *
5965 key_getspacq(struct secpolicyindex *spidx)
5966 {
5967 struct secspacq *acq;
5968
5969 LIST_FOREACH(acq, &spacqtree, chain) {
5970 if (key_cmpspidx_exactly(spidx, &acq->spidx))
5971 return acq;
5972 }
5973
5974 return NULL;
5975 }
5976
5977 /*
5978 * SADB_ACQUIRE processing,
5979 * in first situation, is receiving
5980 * <base>
5981 * from the ikmpd, and clear sequence of its secasvar entry.
5982 *
5983 * In second situation, is receiving
5984 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5985 * from a user land process, and return
5986 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5987 * to the socket.
5988 *
5989 * m will always be freed.
5990 */
5991 static int
5992 key_acquire2(struct socket *so, struct mbuf *m,
5993 const struct sadb_msghdr *mhp)
5994 {
5995 struct sadb_address *src0, *dst0;
5996 struct secasindex saidx;
5997 struct secashead *sah;
5998 u_int16_t proto;
5999 int error;
6000
6001 /* sanity check */
6002 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6003 panic("key_acquire2: NULL pointer is passed.");
6004
6005 /*
6006 * Error message from KMd.
6007 * We assume that if error was occured in IKEd, the length of PFKEY
6008 * message is equal to the size of sadb_msg structure.
6009 * We do not raise error even if error occured in this function.
6010 */
6011 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
6012 #ifndef IPSEC_NONBLOCK_ACQUIRE
6013 struct secacq *acq;
6014 struct timeval tv;
6015
6016 /* check sequence number */
6017 if (mhp->msg->sadb_msg_seq == 0) {
6018 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
6019 m_freem(m);
6020 return 0;
6021 }
6022
6023 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
6024 /*
6025 * the specified larval SA is already gone, or we got
6026 * a bogus sequence number. we can silently ignore it.
6027 */
6028 m_freem(m);
6029 return 0;
6030 }
6031
6032 /* reset acq counter in order to deletion by timehander. */
6033 microtime(&tv);
6034 acq->created = tv.tv_sec;
6035 acq->count = 0;
6036 #endif
6037 m_freem(m);
6038 return 0;
6039 }
6040
6041 /*
6042 * This message is from user land.
6043 */
6044
6045 /* map satype to proto */
6046 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6047 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
6048 return key_senderror(so, m, EINVAL);
6049 }
6050
6051 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6052 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6053 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
6054 /* error */
6055 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6056 return key_senderror(so, m, EINVAL);
6057 }
6058 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6059 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
6060 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
6061 /* error */
6062 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6063 return key_senderror(so, m, EINVAL);
6064 }
6065
6066 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6067 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6068
6069 /* XXX boundary check against sa_len */
6070 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6071
6072 /* get a SA index */
6073 LIST_FOREACH(sah, &sahtree, chain) {
6074 if (sah->state == SADB_SASTATE_DEAD)
6075 continue;
6076 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6077 break;
6078 }
6079 if (sah != NULL) {
6080 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
6081 return key_senderror(so, m, EEXIST);
6082 }
6083
6084 error = key_acquire(&saidx, NULL);
6085 if (error != 0) {
6086 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
6087 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
6088 return key_senderror(so, m, error);
6089 }
6090
6091 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6092 }
6093
6094 /*
6095 * SADB_REGISTER processing.
6096 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6097 * receive
6098 * <base>
6099 * from the ikmpd, and register a socket to send PF_KEY messages,
6100 * and send
6101 * <base, supported>
6102 * to KMD by PF_KEY.
6103 * If socket is detached, must free from regnode.
6104 *
6105 * m will always be freed.
6106 */
6107 static int
6108 key_register(struct socket *so, struct mbuf *m,
6109 const struct sadb_msghdr *mhp)
6110 {
6111 struct secreg *reg, *newreg = NULL;
6112
6113 /* sanity check */
6114 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6115 panic("key_register: NULL pointer is passed.");
6116
6117 /* check for invalid register message */
6118 if (mhp->msg->sadb_msg_satype >= NELEM(regtree))
6119 return key_senderror(so, m, EINVAL);
6120
6121 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6122 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6123 goto setmsg;
6124
6125 /* check whether existing or not */
6126 LIST_FOREACH(reg, &regtree[mhp->msg->sadb_msg_satype], chain) {
6127 if (reg->so == so) {
6128 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
6129 return key_senderror(so, m, EEXIST);
6130 }
6131 }
6132
6133 /* create regnode */
6134 KMALLOC(newreg, struct secreg *, sizeof(*newreg));
6135 if (newreg == NULL) {
6136 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
6137 return key_senderror(so, m, ENOBUFS);
6138 }
6139 bzero((caddr_t)newreg, sizeof(*newreg));
6140
6141 newreg->so = so;
6142 ((struct keycb *)sotorawcb(so))->kp_registered++;
6143
6144 /* add regnode to regtree. */
6145 LIST_INSERT_HEAD(&regtree[mhp->msg->sadb_msg_satype], newreg, chain);
6146
6147 setmsg:
6148 {
6149 struct mbuf *n;
6150 struct sadb_msg *newmsg;
6151 struct sadb_supported *sup;
6152 u_int len, alen, elen;
6153 int off;
6154 int i;
6155 struct sadb_alg *alg;
6156
6157 /* create new sadb_msg to reply. */
6158 alen = 0;
6159 for (i = 1; i <= SADB_AALG_MAX; i++) {
6160 if (ah_algorithm_lookup(i))
6161 alen += sizeof(struct sadb_alg);
6162 }
6163 if (alen)
6164 alen += sizeof(struct sadb_supported);
6165 elen = 0;
6166 #ifdef IPSEC_ESP
6167 for (i = 1; i <= SADB_EALG_MAX; i++) {
6168 if (esp_algorithm_lookup(i))
6169 elen += sizeof(struct sadb_alg);
6170 }
6171 if (elen)
6172 elen += sizeof(struct sadb_supported);
6173 #endif
6174
6175 len = sizeof(struct sadb_msg) + alen + elen;
6176
6177 if (len > MCLBYTES)
6178 return key_senderror(so, m, ENOBUFS);
6179
6180 MGETHDR(n, M_NOWAIT, MT_DATA);
6181 if (len > MHLEN) {
6182 MCLGET(n, M_NOWAIT);
6183 if ((n->m_flags & M_EXT) == 0) {
6184 m_freem(n);
6185 n = NULL;
6186 }
6187 }
6188 if (!n)
6189 return key_senderror(so, m, ENOBUFS);
6190
6191 n->m_pkthdr.len = n->m_len = len;
6192 n->m_next = NULL;
6193 off = 0;
6194
6195 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6196 newmsg = mtod(n, struct sadb_msg *);
6197 newmsg->sadb_msg_errno = 0;
6198 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6199 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6200
6201 /* for authentication algorithm */
6202 if (alen) {
6203 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6204 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6205 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6206 off += PFKEY_ALIGN8(sizeof(*sup));
6207
6208 for (i = 1; i <= SADB_AALG_MAX; i++) {
6209 const struct ah_algorithm *aalgo;
6210
6211 aalgo = ah_algorithm_lookup(i);
6212 if (!aalgo)
6213 continue;
6214 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6215 alg->sadb_alg_id = i;
6216 alg->sadb_alg_ivlen = 0;
6217 alg->sadb_alg_minbits = aalgo->keymin;
6218 alg->sadb_alg_maxbits = aalgo->keymax;
6219 off += PFKEY_ALIGN8(sizeof(*alg));
6220 }
6221 }
6222
6223 #ifdef IPSEC_ESP
6224 /* for encryption algorithm */
6225 if (elen) {
6226 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6227 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6228 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6229 off += PFKEY_ALIGN8(sizeof(*sup));
6230
6231 for (i = 1; i <= SADB_EALG_MAX; i++) {
6232 const struct esp_algorithm *ealgo;
6233
6234 ealgo = esp_algorithm_lookup(i);
6235 if (!ealgo)
6236 continue;
6237 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6238 alg->sadb_alg_id = i;
6239 if (ealgo && ealgo->ivlen) {
6240 /*
6241 * give NULL to get the value preferred by
6242 * algorithm XXX SADB_X_EXT_DERIV ?
6243 */
6244 alg->sadb_alg_ivlen =
6245 (*ealgo->ivlen)(ealgo, NULL);
6246 } else
6247 alg->sadb_alg_ivlen = 0;
6248 alg->sadb_alg_minbits = ealgo->keymin;
6249 alg->sadb_alg_maxbits = ealgo->keymax;
6250 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6251 }
6252 }
6253 #endif
6254
6255 #ifdef DIGAGNOSTIC
6256 if (off != len)
6257 panic("length assumption failed in key_register");
6258 #endif
6259
6260 m_freem(m);
6261 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6262 }
6263 }
6264
6265 /*
6266 * free secreg entry registered.
6267 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6268 */
6269 void
6270 key_freereg(struct socket *so)
6271 {
6272 struct secreg *reg;
6273 int i;
6274
6275 /* sanity check */
6276 if (so == NULL)
6277 panic("key_freereg: NULL pointer is passed.");
6278
6279 /*
6280 * check whether existing or not.
6281 * check all type of SA, because there is a potential that
6282 * one socket is registered to multiple type of SA.
6283 */
6284 lwkt_gettoken(&key_token);
6285 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6286 LIST_FOREACH(reg, &regtree[i], chain) {
6287 if (reg->so == so
6288 && __LIST_CHAINED(reg)) {
6289 LIST_REMOVE(reg, chain);
6290 KFREE(reg);
6291 break;
6292 }
6293 }
6294 }
6295 lwkt_reltoken(&key_token);
6296 }
6297
6298 /*
6299 * SADB_EXPIRE processing
6300 * send
6301 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6302 * to KMD by PF_KEY.
6303 * NOTE: We send only soft lifetime extension.
6304 *
6305 * OUT: 0 : succeed
6306 * others : error number
6307 */
6308 static int
6309 key_expire(struct secasvar *sav)
6310 {
6311 int satype;
6312 struct mbuf *result = NULL, *m;
6313 int len;
6314 int error = -1;
6315 struct sadb_lifetime *lt;
6316
6317 /* sanity check */
6318 if (sav == NULL)
6319 panic("key_expire: NULL pointer is passed.");
6320 if (sav->sah == NULL)
6321 panic("key_expire: Why was SA index in SA NULL.");
6322 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
6323 panic("key_expire: invalid proto is passed.");
6324
6325 /* set msg header */
6326 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6327 if (!m) {
6328 error = ENOBUFS;
6329 goto fail;
6330 }
6331 result = m;
6332
6333 /* create SA extension */
6334 m = key_setsadbsa(sav);
6335 if (!m) {
6336 error = ENOBUFS;
6337 goto fail;
6338 }
6339 m_cat(result, m);
6340
6341 /* create SA extension */
6342 m = key_setsadbxsa2(sav->sah->saidx.mode,
6343 sav->replay ? sav->replay->count : 0,
6344 sav->sah->saidx.reqid);
6345 if (!m) {
6346 error = ENOBUFS;
6347 goto fail;
6348 }
6349 m_cat(result, m);
6350
6351 /* create lifetime extension (current and soft) */
6352 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6353 m = key_alloc_mbuf(len);
6354 if (!m || m->m_next) { /*XXX*/
6355 if (m)
6356 m_freem(m);
6357 error = ENOBUFS;
6358 goto fail;
6359 }
6360 bzero(mtod(m, caddr_t), len);
6361 lt = mtod(m, struct sadb_lifetime *);
6362 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6363 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6364 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
6365 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
6366 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
6367 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
6368 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
6369 bcopy(sav->lft_s, lt, sizeof(*lt));
6370 m_cat(result, m);
6371
6372 /* set sadb_address for source */
6373 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6374 (struct sockaddr *)&sav->sah->saidx.src,
6375 FULLMASK, IPSEC_ULPROTO_ANY);
6376 if (!m) {
6377 error = ENOBUFS;
6378 goto fail;
6379 }
6380 m_cat(result, m);
6381
6382 /* set sadb_address for destination */
6383 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6384 (struct sockaddr *)&sav->sah->saidx.dst,
6385 FULLMASK, IPSEC_ULPROTO_ANY);
6386 if (!m) {
6387 error = ENOBUFS;
6388 goto fail;
6389 }
6390 m_cat(result, m);
6391
6392 if ((result->m_flags & M_PKTHDR) == 0) {
6393 error = EINVAL;
6394 goto fail;
6395 }
6396
6397 if (result->m_len < sizeof(struct sadb_msg)) {
6398 result = m_pullup(result, sizeof(struct sadb_msg));
6399 if (result == NULL) {
6400 error = ENOBUFS;
6401 goto fail;
6402 }
6403 }
6404
6405 result->m_pkthdr.len = 0;
6406 for (m = result; m; m = m->m_next)
6407 result->m_pkthdr.len += m->m_len;
6408
6409 mtod(result, struct sadb_msg *)->sadb_msg_len =
6410 PFKEY_UNIT64(result->m_pkthdr.len);
6411
6412 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6413
6414 fail:
6415 if (result)
6416 m_freem(result);
6417 return error;
6418 }
6419
6420 /*
6421 * SADB_FLUSH processing
6422 * receive
6423 * <base>
6424 * from the ikmpd, and free all entries in secastree.
6425 * and send,
6426 * <base>
6427 * to the ikmpd.
6428 * NOTE: to do is only marking SADB_SASTATE_DEAD.
6429 *
6430 * m will always be freed.
6431 */
6432 static int
6433 key_flush(struct socket *so, struct mbuf *m,
6434 const struct sadb_msghdr *mhp)
6435 {
6436 struct sadb_msg *newmsg;
6437 struct secashead *sah, *nextsah;
6438 struct secasvar *sav, *nextsav;
6439 u_int16_t proto;
6440 u_int8_t state;
6441 u_int stateidx;
6442
6443 /* sanity check */
6444 if (so == NULL || mhp == NULL || mhp->msg == NULL)
6445 panic("key_flush: NULL pointer is passed.");
6446
6447 /* map satype to proto */
6448 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6449 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
6450 return key_senderror(so, m, EINVAL);
6451 }
6452
6453 /* no SATYPE specified, i.e. flushing all SA. */
6454 for (sah = LIST_FIRST(&sahtree);
6455 sah != NULL;
6456 sah = nextsah) {
6457 nextsah = LIST_NEXT(sah, chain);
6458
6459 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6460 && proto != sah->saidx.proto)
6461 continue;
6462
6463 for (stateidx = 0;
6464 stateidx < NELEM(saorder_state_alive);
6465 stateidx++) {
6466 state = saorder_state_any[stateidx];
6467 for (sav = LIST_FIRST(&sah->savtree[state]);
6468 sav != NULL;
6469 sav = nextsav) {
6470
6471 nextsav = LIST_NEXT(sav, chain);
6472
6473 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6474 key_freesav(sav);
6475 }
6476 }
6477
6478 sah->state = SADB_SASTATE_DEAD;
6479 }
6480
6481 if (m->m_len < sizeof(struct sadb_msg) ||
6482 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
6483 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
6484 return key_senderror(so, m, ENOBUFS);
6485 }
6486
6487 if (m->m_next)
6488 m_freem(m->m_next);
6489 m->m_next = NULL;
6490 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
6491 newmsg = mtod(m, struct sadb_msg *);
6492 newmsg->sadb_msg_errno = 0;
6493 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
6494
6495 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6496 }
6497
6498 /*
6499 * SADB_DUMP processing
6500 * dump all entries including status of DEAD in SAD.
6501 * receive
6502 * <base>
6503 * from the ikmpd, and dump all secasvar leaves
6504 * and send,
6505 * <base> .....
6506 * to the ikmpd.
6507 *
6508 * m will always be freed.
6509 */
6510 static int
6511 key_dump(struct socket *so, struct mbuf *m,
6512 const struct sadb_msghdr *mhp)
6513 {
6514 struct secashead *sah;
6515 struct secasvar *sav;
6516 u_int16_t proto;
6517 u_int stateidx;
6518 u_int8_t satype;
6519 u_int8_t state;
6520 int cnt;
6521 struct mbuf *n;
6522
6523 /* sanity check */
6524 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6525 panic("key_dump: NULL pointer is passed.");
6526
6527 /* map satype to proto */
6528 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6529 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
6530 return key_senderror(so, m, EINVAL);
6531 }
6532
6533 /* count sav entries to be sent to the userland. */
6534 cnt = 0;
6535 LIST_FOREACH(sah, &sahtree, chain) {
6536 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6537 && proto != sah->saidx.proto)
6538 continue;
6539
6540 for (stateidx = 0;
6541 stateidx < NELEM(saorder_state_any);
6542 stateidx++) {
6543 state = saorder_state_any[stateidx];
6544 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6545 cnt++;
6546 }
6547 }
6548 }
6549
6550 if (cnt == 0)
6551 return key_senderror(so, m, ENOENT);
6552
6553 /* send this to the userland, one at a time. */
6554 LIST_FOREACH(sah, &sahtree, chain) {
6555 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6556 && proto != sah->saidx.proto)
6557 continue;
6558
6559 /* map proto to satype */
6560 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
6561 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n"));
6562 return key_senderror(so, m, EINVAL);
6563 }
6564
6565 for (stateidx = 0;
6566 stateidx < NELEM(saorder_state_any);
6567 stateidx++) {
6568 state = saorder_state_any[stateidx];
6569 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6570 n = key_setdumpsa(sav, SADB_DUMP, satype,
6571 --cnt, mhp->msg->sadb_msg_pid);
6572 if (!n)
6573 return key_senderror(so, m, ENOBUFS);
6574
6575 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6576 }
6577 }
6578 }
6579
6580 m_freem(m);
6581 return 0;
6582 }
6583
6584 /*
6585 * SADB_X_PROMISC processing
6586 *
6587 * m will always be freed.
6588 */
6589 static int
6590 key_promisc(struct socket *so, struct mbuf *m,
6591 const struct sadb_msghdr *mhp)
6592 {
6593 int olen;
6594
6595 /* sanity check */
6596 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6597 panic("key_promisc: NULL pointer is passed.");
6598
6599 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6600
6601 if (olen < sizeof(struct sadb_msg)) {
6602 #if 1
6603 return key_senderror(so, m, EINVAL);
6604 #else
6605 m_freem(m);
6606 return 0;
6607 #endif
6608 } else if (olen == sizeof(struct sadb_msg)) {
6609 /* enable/disable promisc mode */
6610 struct keycb *kp;
6611
6612 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
6613 return key_senderror(so, m, EINVAL);
6614 mhp->msg->sadb_msg_errno = 0;
6615 switch (mhp->msg->sadb_msg_satype) {
6616 case 0:
6617 case 1:
6618 kp->kp_promisc = mhp->msg->sadb_msg_satype;
6619 break;
6620 default:
6621 return key_senderror(so, m, EINVAL);
6622 }
6623
6624 /* send the original message back to everyone */
6625 mhp->msg->sadb_msg_errno = 0;
6626 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6627 } else {
6628 /* send packet as is */
6629
6630 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
6631
6632 /* TODO: if sadb_msg_seq is specified, send to specific pid */
6633 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6634 }
6635 }
6636
6637 static int (*key_typesw[]) (struct socket *, struct mbuf *,
6638 const struct sadb_msghdr *) = {
6639 NULL, /* SADB_RESERVED */
6640 key_getspi, /* SADB_GETSPI */
6641 key_update, /* SADB_UPDATE */
6642 key_add, /* SADB_ADD */
6643 key_delete, /* SADB_DELETE */
6644 key_get, /* SADB_GET */
6645 key_acquire2, /* SADB_ACQUIRE */
6646 key_register, /* SADB_REGISTER */
6647 NULL, /* SADB_EXPIRE */
6648 key_flush, /* SADB_FLUSH */
6649 key_dump, /* SADB_DUMP */
6650 key_promisc, /* SADB_X_PROMISC */
6651 NULL, /* SADB_X_PCHANGE */
6652 key_spdadd, /* SADB_X_SPDUPDATE */
6653 key_spdadd, /* SADB_X_SPDADD */
6654 key_spddelete, /* SADB_X_SPDDELETE */
6655 key_spdget, /* SADB_X_SPDGET */
6656 NULL, /* SADB_X_SPDACQUIRE */
6657 key_spddump, /* SADB_X_SPDDUMP */
6658 key_spdflush, /* SADB_X_SPDFLUSH */
6659 key_spdadd, /* SADB_X_SPDSETIDX */
6660 NULL, /* SADB_X_SPDEXPIRE */
6661 key_spddelete2, /* SADB_X_SPDDELETE2 */
6662 };
6663
6664 /*
6665 * parse sadb_msg buffer to process PFKEYv2,
6666 * and create a data to response if needed.
6667 * I think to be dealed with mbuf directly.
6668 * IN:
6669 * msgp : pointer to pointer to a received buffer pulluped.
6670 * This is rewrited to response.
6671 * so : pointer to socket.
6672 * OUT:
6673 * length for buffer to send to user process.
6674 */
6675 int
6676 key_parse(struct mbuf *m, struct socket *so)
6677 {
6678 struct sadb_msg *msg;
6679 struct sadb_msghdr mh;
6680 int error;
6681 int target;
6682
6683 /* sanity check */
6684 if (m == NULL || so == NULL)
6685 panic("key_parse: NULL pointer is passed.");
6686
6687 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
6688 KEYDEBUG(KEYDEBUG_KEY_DUMP,
6689 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
6690 kdebug_sadb(msg));
6691 #endif
6692
6693 if (m->m_len < sizeof(struct sadb_msg)) {
6694 m = m_pullup(m, sizeof(struct sadb_msg));
6695 if (!m)
6696 return ENOBUFS;
6697 }
6698 msg = mtod(m, struct sadb_msg *);
6699 target = KEY_SENDUP_ONE;
6700
6701 if ((m->m_flags & M_PKTHDR) == 0 ||
6702 m->m_pkthdr.len != m->m_pkthdr.len) {
6703 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
6704 pfkeystat.out_invlen++;
6705 error = EINVAL;
6706 goto senderror;
6707 }
6708
6709 if (msg->sadb_msg_version != PF_KEY_V2) {
6710 ipseclog((LOG_DEBUG,
6711 "key_parse: PF_KEY version %u is mismatched.\n",
6712 msg->sadb_msg_version));
6713 pfkeystat.out_invver++;
6714 error = EINVAL;
6715 goto senderror;
6716 }
6717
6718 if (msg->sadb_msg_type > SADB_MAX) {
6719 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6720 msg->sadb_msg_type));
6721 pfkeystat.out_invmsgtype++;
6722 error = EINVAL;
6723 goto senderror;
6724 }
6725
6726 /* for old-fashioned code - should be nuked */
6727 if (m->m_pkthdr.len > MCLBYTES) {
6728 m_freem(m);
6729 return ENOBUFS;
6730 }
6731 if (m->m_next) {
6732 struct mbuf *n;
6733
6734 MGETHDR(n, M_NOWAIT, MT_DATA);
6735 if (n && m->m_pkthdr.len > MHLEN) {
6736 MCLGET(n, M_NOWAIT);
6737 if ((n->m_flags & M_EXT) == 0) {
6738 m_free(n);
6739 n = NULL;
6740 }
6741 }
6742 if (!n) {
6743 m_freem(m);
6744 return ENOBUFS;
6745 }
6746 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
6747 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
6748 n->m_next = NULL;
6749 m_freem(m);
6750 m = n;
6751 }
6752
6753 /* align the mbuf chain so that extensions are in contiguous region. */
6754 error = key_align(m, &mh);
6755 if (error)
6756 return error;
6757
6758 if (m->m_next) { /*XXX*/
6759 m_freem(m);
6760 return ENOBUFS;
6761 }
6762
6763 msg = mh.msg;
6764
6765 /* check SA type */
6766 switch (msg->sadb_msg_satype) {
6767 case SADB_SATYPE_UNSPEC:
6768 switch (msg->sadb_msg_type) {
6769 case SADB_GETSPI:
6770 case SADB_UPDATE:
6771 case SADB_ADD:
6772 case SADB_DELETE:
6773 case SADB_GET:
6774 case SADB_ACQUIRE:
6775 case SADB_EXPIRE:
6776 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
6777 "when msg type=%u.\n", msg->sadb_msg_type));
6778 pfkeystat.out_invsatype++;
6779 error = EINVAL;
6780 goto senderror;
6781 }
6782 break;
6783 case SADB_SATYPE_AH:
6784 case SADB_SATYPE_ESP:
6785 case SADB_X_SATYPE_IPCOMP:
6786 case SADB_X_SATYPE_TCPSIGNATURE:
6787 switch (msg->sadb_msg_type) {
6788 case SADB_X_SPDADD:
6789 case SADB_X_SPDDELETE:
6790 case SADB_X_SPDGET:
6791 case SADB_X_SPDDUMP:
6792 case SADB_X_SPDFLUSH:
6793 case SADB_X_SPDSETIDX:
6794 case SADB_X_SPDUPDATE:
6795 case SADB_X_SPDDELETE2:
6796 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
6797 msg->sadb_msg_type));
6798 pfkeystat.out_invsatype++;
6799 error = EINVAL;
6800 goto senderror;
6801 }
6802 break;
6803 case SADB_SATYPE_RSVP:
6804 case SADB_SATYPE_OSPFV2:
6805 case SADB_SATYPE_RIPV2:
6806 case SADB_SATYPE_MIP:
6807 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
6808 msg->sadb_msg_satype));
6809 pfkeystat.out_invsatype++;
6810 error = EOPNOTSUPP;
6811 goto senderror;
6812 case 1: /* XXX: What does it do? */
6813 if (msg->sadb_msg_type == SADB_X_PROMISC)
6814 break;
6815 /*FALLTHROUGH*/
6816 default:
6817 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6818 msg->sadb_msg_satype));
6819 pfkeystat.out_invsatype++;
6820 error = EINVAL;
6821 goto senderror;
6822 }
6823
6824 /* check field of upper layer protocol and address family */
6825 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
6826 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
6827 struct sadb_address *src0, *dst0;
6828 u_int plen;
6829
6830 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
6831 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
6832
6833 /* check upper layer protocol */
6834 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
6835 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
6836 pfkeystat.out_invaddr++;
6837 error = EINVAL;
6838 goto senderror;
6839 }
6840
6841 /* check family */
6842 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
6843 PFKEY_ADDR_SADDR(dst0)->sa_family) {
6844 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
6845 pfkeystat.out_invaddr++;
6846 error = EINVAL;
6847 goto senderror;
6848 }
6849 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6850 PFKEY_ADDR_SADDR(dst0)->sa_len) {
6851 ipseclog((LOG_DEBUG,
6852 "key_parse: address struct size mismatched.\n"));
6853 pfkeystat.out_invaddr++;
6854 error = EINVAL;
6855 goto senderror;
6856 }
6857
6858 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6859 case AF_INET:
6860 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6861 sizeof(struct sockaddr_in)) {
6862 pfkeystat.out_invaddr++;
6863 error = EINVAL;
6864 goto senderror;
6865 }
6866 break;
6867 case AF_INET6:
6868 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6869 sizeof(struct sockaddr_in6)) {
6870 pfkeystat.out_invaddr++;
6871 error = EINVAL;
6872 goto senderror;
6873 }
6874 break;
6875 default:
6876 ipseclog((LOG_DEBUG,
6877 "key_parse: unsupported address family.\n"));
6878 pfkeystat.out_invaddr++;
6879 error = EAFNOSUPPORT;
6880 goto senderror;
6881 }
6882
6883 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6884 case AF_INET:
6885 plen = sizeof(struct in_addr) << 3;
6886 break;
6887 case AF_INET6:
6888 plen = sizeof(struct in6_addr) << 3;
6889 break;
6890 default:
6891 plen = 0; /*fool gcc*/
6892 break;
6893 }
6894
6895 /* check max prefix length */
6896 if (src0->sadb_address_prefixlen > plen ||
6897 dst0->sadb_address_prefixlen > plen) {
6898 ipseclog((LOG_DEBUG,
6899 "key_parse: illegal prefixlen.\n"));
6900 pfkeystat.out_invaddr++;
6901 error = EINVAL;
6902 goto senderror;
6903 }
6904
6905 /*
6906 * prefixlen == 0 is valid because there can be a case when
6907 * all addresses are matched.
6908 */
6909 }
6910
6911 if (msg->sadb_msg_type >= NELEM(key_typesw) ||
6912 key_typesw[msg->sadb_msg_type] == NULL) {
6913 pfkeystat.out_invmsgtype++;
6914 error = EINVAL;
6915 goto senderror;
6916 }
6917
6918 lwkt_gettoken(&key_token);
6919 error = (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
6920 lwkt_reltoken(&key_token);
6921 return error;
6922
6923 senderror:
6924 msg->sadb_msg_errno = error;
6925 lwkt_gettoken(&key_token);
6926 error = key_sendup_mbuf(so, m, target);
6927 lwkt_reltoken(&key_token);
6928 return error;
6929 }
6930
6931 static int
6932 key_senderror(struct socket *so, struct mbuf *m, int code)
6933 {
6934 struct sadb_msg *msg;
6935
6936 if (m->m_len < sizeof(struct sadb_msg))
6937 panic("invalid mbuf passed to key_senderror");
6938
6939 msg = mtod(m, struct sadb_msg *);
6940 msg->sadb_msg_errno = code;
6941 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
6942 }
6943
6944 /*
6945 * set the pointer to each header into message buffer.
6946 * m will be freed on error.
6947 * XXX larger-than-MCLBYTES extension?
6948 */
6949 static int
6950 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
6951 {
6952 struct mbuf *n;
6953 struct sadb_ext *ext;
6954 size_t off, end;
6955 int extlen;
6956 int toff;
6957
6958 /* sanity check */
6959 if (m == NULL || mhp == NULL)
6960 panic("key_align: NULL pointer is passed.");
6961 if (m->m_len < sizeof(struct sadb_msg))
6962 panic("invalid mbuf passed to key_align");
6963
6964 /* initialize */
6965 bzero(mhp, sizeof(*mhp));
6966
6967 mhp->msg = mtod(m, struct sadb_msg *);
6968 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
6969
6970 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6971 extlen = end; /*just in case extlen is not updated*/
6972 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
6973 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
6974 if (!n) {
6975 /* m is already freed */
6976 return ENOBUFS;
6977 }
6978 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
6979
6980 /* set pointer */
6981 switch (ext->sadb_ext_type) {
6982 case SADB_EXT_SA:
6983 case SADB_EXT_ADDRESS_SRC:
6984 case SADB_EXT_ADDRESS_DST:
6985 case SADB_EXT_ADDRESS_PROXY:
6986 case SADB_EXT_LIFETIME_CURRENT:
6987 case SADB_EXT_LIFETIME_HARD:
6988 case SADB_EXT_LIFETIME_SOFT:
6989 case SADB_EXT_KEY_AUTH:
6990 case SADB_EXT_KEY_ENCRYPT:
6991 case SADB_EXT_IDENTITY_SRC:
6992 case SADB_EXT_IDENTITY_DST:
6993 case SADB_EXT_SENSITIVITY:
6994 case SADB_EXT_PROPOSAL:
6995 case SADB_EXT_SUPPORTED_AUTH:
6996 case SADB_EXT_SUPPORTED_ENCRYPT:
6997 case SADB_EXT_SPIRANGE:
6998 case SADB_X_EXT_POLICY:
6999 case SADB_X_EXT_SA2:
7000 /* duplicate check */
7001 /*
7002 * XXX Are there duplication payloads of either
7003 * KEY_AUTH or KEY_ENCRYPT ?
7004 */
7005 if (mhp->ext[ext->sadb_ext_type] != NULL) {
7006 ipseclog((LOG_DEBUG,
7007 "key_align: duplicate ext_type %u "
7008 "is passed.\n", ext->sadb_ext_type));
7009 m_freem(m);
7010 pfkeystat.out_dupext++;
7011 return EINVAL;
7012 }
7013 break;
7014 default:
7015 ipseclog((LOG_DEBUG,
7016 "key_align: invalid ext_type %u is passed.\n",
7017 ext->sadb_ext_type));
7018 m_freem(m);
7019 pfkeystat.out_invexttype++;
7020 return EINVAL;
7021 }
7022
7023 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
7024
7025 if (key_validate_ext(ext, extlen)) {
7026 m_freem(m);
7027 pfkeystat.out_invlen++;
7028 return EINVAL;
7029 }
7030
7031 n = m_pulldown(m, off, extlen, &toff);
7032 if (!n) {
7033 /* m is already freed */
7034 return ENOBUFS;
7035 }
7036 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7037
7038 mhp->ext[ext->sadb_ext_type] = ext;
7039 mhp->extoff[ext->sadb_ext_type] = off;
7040 mhp->extlen[ext->sadb_ext_type] = extlen;
7041 }
7042
7043 if (off != end) {
7044 m_freem(m);
7045 pfkeystat.out_invlen++;
7046 return EINVAL;
7047 }
7048
7049 return 0;
7050 }
7051
7052 static int
7053 key_validate_ext(const struct sadb_ext *ext, int len)
7054 {
7055 const struct sockaddr *sa;
7056 enum { NONE, ADDR } checktype = NONE;
7057 int baselen = 0;
7058 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
7059
7060 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
7061 return EINVAL;
7062
7063 /* if it does not match minimum/maximum length, bail */
7064 if (ext->sadb_ext_type >= NELEM(minsize) ||
7065 ext->sadb_ext_type >= NELEM(maxsize))
7066 return EINVAL;
7067 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
7068 return EINVAL;
7069 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
7070 return EINVAL;
7071
7072 /* more checks based on sadb_ext_type XXX need more */
7073 switch (ext->sadb_ext_type) {
7074 case SADB_EXT_ADDRESS_SRC:
7075 case SADB_EXT_ADDRESS_DST:
7076 case SADB_EXT_ADDRESS_PROXY:
7077 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7078 checktype = ADDR;
7079 break;
7080 case SADB_EXT_IDENTITY_SRC:
7081 case SADB_EXT_IDENTITY_DST:
7082 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7083 SADB_X_IDENTTYPE_ADDR) {
7084 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7085 checktype = ADDR;
7086 } else
7087 checktype = NONE;
7088 break;
7089 default:
7090 checktype = NONE;
7091 break;
7092 }
7093
7094 switch (checktype) {
7095 case NONE:
7096 break;
7097 case ADDR:
7098 sa = (const struct sockaddr *)((c_caddr_t)ext + baselen);
7099 if (len < baselen + sal)
7100 return EINVAL;
7101 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7102 return EINVAL;
7103 break;
7104 }
7105
7106 return 0;
7107 }
7108
7109 void
7110 key_init(void)
7111 {
7112 int i;
7113
7114 bzero((caddr_t)&key_cb, sizeof(key_cb));
7115
7116 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7117 LIST_INIT(&sptree[i]);
7118 }
7119
7120 LIST_INIT(&sahtree);
7121
7122 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7123 LIST_INIT(&regtree[i]);
7124 }
7125
7126 #ifndef IPSEC_NONBLOCK_ACQUIRE
7127 LIST_INIT(&acqtree);
7128 #endif
7129 LIST_INIT(&spacqtree);
7130
7131 /* system default */
7132 #ifdef INET
7133 ip4_def_policy.policy = IPSEC_POLICY_NONE;
7134 ip4_def_policy.refcnt++; /*never reclaim this*/
7135 #endif
7136 #ifdef INET6
7137 ip6_def_policy.policy = IPSEC_POLICY_NONE;
7138 ip6_def_policy.refcnt++; /*never reclaim this*/
7139 #endif
7140
7141 #ifndef IPSEC_DEBUG2
7142 callout_init(&key_timehandler_ch);
7143 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
7144 #endif /*IPSEC_DEBUG2*/
7145
7146 /* initialize key statistics */
7147 keystat.getspi_count = 1;
7148
7149 kprintf("IPsec: Initialized Security Association Processing.\n");
7150
7151 return;
7152 }
7153
7154 /*
7155 * XXX: maybe This function is called after INBOUND IPsec processing.
7156 *
7157 * Special check for tunnel-mode packets.
7158 * We must make some checks for consistency between inner and outer IP header.
7159 *
7160 * xxx more checks to be provided
7161 */
7162 int
7163 key_checktunnelsanity(struct secasvar *sav, u_int family,
7164 caddr_t src, caddr_t dst)
7165 {
7166 /* sanity check */
7167 if (sav->sah == NULL)
7168 panic("sav->sah == NULL at key_checktunnelsanity");
7169
7170 /* XXX: check inner IP header */
7171
7172 return 1;
7173 }
7174
7175 #if 0
7176 #define hostnamelen strlen(hostname)
7177
7178 /*
7179 * Get FQDN for the host.
7180 * If the administrator configured hostname (by hostname(1)) without
7181 * domain name, returns nothing.
7182 */
7183 static const char *
7184 key_getfqdn(void)
7185 {
7186 int i;
7187 int hasdot;
7188 static char fqdn[MAXHOSTNAMELEN + 1];
7189
7190 if (!hostnamelen)
7191 return NULL;
7192
7193 /* check if it comes with domain name. */
7194 hasdot = 0;
7195 for (i = 0; i < hostnamelen; i++) {
7196 if (hostname[i] == '.')
7197 hasdot++;
7198 }
7199 if (!hasdot)
7200 return NULL;
7201
7202 /* NOTE: hostname may not be NUL-terminated. */
7203 bzero(fqdn, sizeof(fqdn));
7204 bcopy(hostname, fqdn, hostnamelen);
7205 fqdn[hostnamelen] = '\0';
7206 return fqdn;
7207 }
7208
7209 /*
7210 * get username@FQDN for the host/user.
7211 */
7212 static const char *
7213 key_getuserfqdn(void)
7214 {
7215 const char *host;
7216 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
7217 struct proc *p = curproc;
7218 char *q;
7219
7220 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
7221 return NULL;
7222 if (!(host = key_getfqdn()))
7223 return NULL;
7224
7225 /* NOTE: s_login may not be-NUL terminated. */
7226 bzero(userfqdn, sizeof(userfqdn));
7227 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME);
7228 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
7229 q = userfqdn + strlen(userfqdn);
7230 *q++ = '@';
7231 bcopy(host, q, strlen(host));
7232 q += strlen(host);
7233 *q++ = '\0';
7234
7235 return userfqdn;
7236 }
7237 #endif
7238
7239 /* record data transfer on SA, and update timestamps */
7240 void
7241 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
7242 {
7243 if (!sav)
7244 panic("key_sa_recordxfer called with sav == NULL");
7245 if (!m)
7246 panic("key_sa_recordxfer called with m == NULL");
7247 if (!sav->lft_c)
7248 return;
7249
7250 /*
7251 * XXX Currently, there is a difference of bytes size
7252 * between inbound and outbound processing.
7253 */
7254 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
7255 /* to check bytes lifetime is done in key_timehandler(). */
7256
7257 /*
7258 * We use the number of packets as the unit of
7259 * sadb_lifetime_allocations. We increment the variable
7260 * whenever {esp,ah}_{in,out}put is called.
7261 */
7262 sav->lft_c->sadb_lifetime_allocations++;
7263 /* XXX check for expires? */
7264
7265 /*
7266 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
7267 * in seconds. HARD and SOFT lifetime are measured by the time
7268 * difference (again in seconds) from sadb_lifetime_usetime.
7269 *
7270 * usetime
7271 * v expire expire
7272 * -----+-----+--------+---> t
7273 * <--------------> HARD
7274 * <-----> SOFT
7275 */
7276 {
7277 struct timeval tv;
7278 microtime(&tv);
7279 sav->lft_c->sadb_lifetime_usetime = tv.tv_sec;
7280 /* XXX check for expires? */
7281 }
7282
7283 return;
7284 }
7285
7286 /* dumb version */
7287 void
7288 key_sa_routechange(struct sockaddr *dst)
7289 {
7290 struct secashead *sah;
7291 struct route *ro;
7292
7293 lwkt_gettoken(&key_token);
7294 LIST_FOREACH(sah, &sahtree, chain) {
7295 ro = &sah->sa_route;
7296 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
7297 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
7298 RTFREE(ro->ro_rt);
7299 ro->ro_rt = NULL;
7300 }
7301 }
7302 lwkt_reltoken(&key_token);
7303 }
7304
7305 static void
7306 key_sa_chgstate(struct secasvar *sav, u_int8_t state)
7307 {
7308 if (sav == NULL)
7309 panic("key_sa_chgstate called with sav == NULL");
7310
7311 if (sav->state == state)
7312 return;
7313
7314 if (__LIST_CHAINED(sav))
7315 LIST_REMOVE(sav, chain);
7316
7317 sav->state = state;
7318 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7319 }
7320
7321 void
7322 key_sa_stir_iv(struct secasvar *sav)
7323 {
7324 if (!sav->iv)
7325 panic("key_sa_stir_iv called with sav == NULL");
7326 key_randomfill(sav->iv, sav->ivlen);
7327 }
7328
7329 /* XXX too much? */
7330 static struct mbuf *
7331 key_alloc_mbuf(int l)
7332 {
7333 struct mbuf *m = NULL, *n;
7334 int len, t;
7335
7336 len = l;
7337 while (len > 0) {
7338 MGET(n, M_NOWAIT, MT_DATA);
7339 if (n && len > MLEN)
7340 MCLGET(n, M_NOWAIT);
7341 if (!n) {
7342 m_freem(m);
7343 return NULL;
7344 }
7345
7346 n->m_next = NULL;
7347 n->m_len = 0;
7348 n->m_len = M_TRAILINGSPACE(n);
7349 /* use the bottom of mbuf, hoping we can prepend afterwards */
7350 if (n->m_len > len) {
7351 t = (n->m_len - len) & ~(sizeof(long) - 1);
7352 n->m_data += t;
7353 n->m_len = len;
7354 }
7355
7356 len -= n->m_len;
7357
7358 if (m)
7359 m_cat(m, n);
7360 else
7361 m = n;
7362 }
7363
7364 return m;
7365 }
DragonFly BSD