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Start flushing out the IPI routines and do some clean-up.
[dragonfly/vkernel-mp.git] / sys / netproto / key / key.c
blob93d237989543870ff6caf12badaf0cf2eae2b693
1 /* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */
2 /* $DragonFly: src/sys/netproto/key/key.c,v 1.20 2007/05/13 18:33:58 swildner Exp $ */
3 /* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
4
5 /*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /*
35 * This code is referd to RFC 2367
36 */
37
38 #include "opt_inet.h"
39 #include "opt_inet6.h"
40 #include "opt_ipsec.h"
41
42 #include <sys/types.h>
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/mbuf.h>
47 #include <sys/domain.h>
48 #include <sys/protosw.h>
49 #include <sys/malloc.h>
50 #include <sys/socket.h>
51 #include <sys/socketvar.h>
52 #include <sys/sysctl.h>
53 #include <sys/errno.h>
54 #include <sys/proc.h>
55 #include <sys/queue.h>
56 #include <sys/syslog.h>
57 #include <sys/thread2.h>
58
59 #include <net/if.h>
60 #include <net/route.h>
61 #include <net/raw_cb.h>
62
63 #include <netinet/in.h>
64 #include <netinet/in_systm.h>
65 #include <netinet/ip.h>
66 #include <netinet/in_var.h>
67
68 #ifdef INET6
69 #include <netinet/ip6.h>
70 #include <netinet6/in6_var.h>
71 #include <netinet6/ip6_var.h>
72 #endif /* INET6 */
73
74 #ifdef INET
75 #include <netinet/in_pcb.h>
76 #endif
77 #ifdef INET6
78 #include <netinet6/in6_pcb.h>
79 #endif /* INET6 */
80
81 #include <net/pfkeyv2.h>
82 #include "keydb.h"
83 #include "key.h"
84 #include "keysock.h"
85 #include "key_debug.h"
86
87 #include <netinet6/ipsec.h>
88 #ifdef INET6
89 #include <netinet6/ipsec6.h>
90 #endif
91 #include <netinet6/ah.h>
92 #ifdef INET6
93 #include <netinet6/ah6.h>
94 #endif
95 #ifdef IPSEC_ESP
96 #include <netinet6/esp.h>
97 #ifdef INET6
98 #include <netinet6/esp6.h>
99 #endif
100 #endif
101 #include <netinet6/ipcomp.h>
102 #ifdef INET6
103 #include <netinet6/ipcomp6.h>
104 #endif
105
106 #include <machine/stdarg.h>
107
108 /* randomness */
109 #include <sys/random.h>
110
111 #include <net/net_osdep.h>
112
113 #ifndef satosin
114 #define satosin(s) ((struct sockaddr_in *)s)
115 #endif
116
117 #define FULLMASK 0xff
118
119 /*
120 * Note on SA reference counting:
121 * - SAs that are not in DEAD state will have (total external reference + 1)
122 * following value in reference count field. they cannot be freed and are
123 * referenced from SA header.
124 * - SAs that are in DEAD state will have (total external reference)
125 * in reference count field. they are ready to be freed. reference from
126 * SA header will be removed in key_delsav(), when the reference count
127 * field hits 0 (= no external reference other than from SA header.
128 */
129
130 #ifndef IPSEC_DEBUG2
131 static struct callout key_timehandler_ch;
132 #endif
133 u_int32_t key_debug_level = 0;
134 static u_int key_spi_trycnt = 1000;
135 static u_int32_t key_spi_minval = 0x100;
136 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
137 static u_int32_t policy_id = 0;
138 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
139 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
140 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
141 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
142 static int key_preferred_oldsa = 1; /* preferred old sa rather than new sa.*/
143
144 static u_int32_t acq_seq = 0;
145 static int key_tick_init_random = 0;
146
147 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
148 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
149 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
150 /* registed list */
151 #ifndef IPSEC_NONBLOCK_ACQUIRE
152 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
153 #endif
154 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
155
156 struct key_cb key_cb;
157
158 /* search order for SAs */
159 static const u_int saorder_state_valid_prefer_old[] = {
160 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
161 };
162 static const u_int saorder_state_valid_prefer_new[] = {
163 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
164 };
165 static const u_int saorder_state_alive[] = {
166 /* except DEAD */
167 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
168 };
169 static const u_int saorder_state_any[] = {
170 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
171 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
172 };
173
174 static const int minsize[] = {
175 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
176 sizeof(struct sadb_sa), /* SADB_EXT_SA */
177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
178 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
181 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
182 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
183 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
184 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
185 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
186 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
187 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
188 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
189 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
190 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
191 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
192 0, /* SADB_X_EXT_KMPRIVATE */
193 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
194 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
195 };
196 static const int maxsize[] = {
197 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
198 sizeof(struct sadb_sa), /* SADB_EXT_SA */
199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
200 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
202 0, /* SADB_EXT_ADDRESS_SRC */
203 0, /* SADB_EXT_ADDRESS_DST */
204 0, /* SADB_EXT_ADDRESS_PROXY */
205 0, /* SADB_EXT_KEY_AUTH */
206 0, /* SADB_EXT_KEY_ENCRYPT */
207 0, /* SADB_EXT_IDENTITY_SRC */
208 0, /* SADB_EXT_IDENTITY_DST */
209 0, /* SADB_EXT_SENSITIVITY */
210 0, /* SADB_EXT_PROPOSAL */
211 0, /* SADB_EXT_SUPPORTED_AUTH */
212 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
213 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
214 0, /* SADB_X_EXT_KMPRIVATE */
215 0, /* SADB_X_EXT_POLICY */
216 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
217 };
218
219 static int ipsec_esp_keymin = 256;
220 static int ipsec_esp_auth = 0;
221 static int ipsec_ah_keymin = 128;
222
223 #ifdef SYSCTL_DECL
224 SYSCTL_DECL(_net_key);
225 #endif
226
227 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
228 &key_debug_level, 0, "");
229
230 /* max count of trial for the decision of spi value */
231 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
232 &key_spi_trycnt, 0, "");
233
234 /* minimum spi value to allocate automatically. */
235 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
236 &key_spi_minval, 0, "");
237
238 /* maximun spi value to allocate automatically. */
239 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
240 &key_spi_maxval, 0, "");
241
242 /* interval to initialize randseed */
243 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
244 &key_int_random, 0, "");
245
246 /* lifetime for larval SA */
247 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
248 &key_larval_lifetime, 0, "");
249
250 /* counter for blocking to send SADB_ACQUIRE to IKEd */
251 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
252 &key_blockacq_count, 0, "");
253
254 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
255 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
256 &key_blockacq_lifetime, 0, "");
257
258 /* ESP auth */
259 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
260 &ipsec_esp_auth, 0, "");
261
262 /* minimum ESP key length */
263 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
264 &ipsec_esp_keymin, 0, "");
265
266 /* minimum AH key length */
267 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
268 &ipsec_ah_keymin, 0, "");
269
270 /* perfered old SA rather than new SA */
271 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
272 &key_preferred_oldsa, 0, "");
273
274 #ifndef LIST_FOREACH
275 #define LIST_FOREACH(elm, head, field) \
276 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
277 #endif
278 #define __LIST_CHAINED(elm) \
279 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
280 #define LIST_INSERT_TAIL(head, elm, type, field) \
281 do {\
282 struct type *curelm = LIST_FIRST(head); \
283 if (curelm == NULL) {\
284 LIST_INSERT_HEAD(head, elm, field); \
285 } else { \
286 while (LIST_NEXT(curelm, field)) \
287 curelm = LIST_NEXT(curelm, field);\
288 LIST_INSERT_AFTER(curelm, elm, field);\
289 }\
290 } while (0)
291
292 #define KEY_CHKSASTATE(head, sav, name) \
293 do { \
294 if ((head) != (sav)) { \
295 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
296 (name), (head), (sav))); \
297 continue; \
298 } \
299 } while (0)
300
301 #define KEY_CHKSPDIR(head, sp, name) \
302 do { \
303 if ((head) != (sp)) { \
304 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
305 "anyway continue.\n", \
306 (name), (head), (sp))); \
307 } \
308 } while (0)
309
310 #if 1
311 #define KMALLOC(p, t, n) \
312 ((p) = (t) kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK))
313 #define KFREE(p) \
314 kfree((caddr_t)(p), M_SECA);
315 #else
316 #define KMALLOC(p, t, n) \
317 do { \
318 ((p) = (t)kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK)); \
319 kprintf("%s %d: %p <- KMALLOC(%s, %d)\n", \
320 __FILE__, __LINE__, (p), #t, n); \
321 } while (0)
322
323 #define KFREE(p) \
324 do { \
325 kprintf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
326 kfree((caddr_t)(p), M_SECA); \
327 } while (0)
328 #endif
329
330 /*
331 * set parameters into secpolicyindex buffer.
332 * Must allocate secpolicyindex buffer passed to this function.
333 */
334 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
335 do { \
336 bzero((idx), sizeof(struct secpolicyindex)); \
337 (idx)->dir = (_dir); \
338 (idx)->prefs = (ps); \
339 (idx)->prefd = (pd); \
340 (idx)->ul_proto = (ulp); \
341 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
342 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
343 } while (0)
344
345 /*
346 * set parameters into secasindex buffer.
347 * Must allocate secasindex buffer before calling this function.
348 */
349 #define KEY_SETSECASIDX(p, m, r, s, d, idx) \
350 do { \
351 bzero((idx), sizeof(struct secasindex)); \
352 (idx)->proto = (p); \
353 (idx)->mode = (m); \
354 (idx)->reqid = (r); \
355 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
356 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
357 } while (0)
358
359 /* key statistics */
360 struct _keystat {
361 u_long getspi_count; /* the avarage of count to try to get new SPI */
362 } keystat;
363
364 struct sadb_msghdr {
365 struct sadb_msg *msg;
366 struct sadb_ext *ext[SADB_EXT_MAX + 1];
367 int extoff[SADB_EXT_MAX + 1];
368 int extlen[SADB_EXT_MAX + 1];
369 };
370
371 static struct secasvar *key_allocsa_policy (struct secasindex *);
372 static void key_freesp_so (struct secpolicy **);
373 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
374 static void key_delsp (struct secpolicy *);
375 static struct secpolicy *key_getsp (struct secpolicyindex *);
376 static struct secpolicy *key_getspbyid (u_int32_t);
377 static u_int32_t key_newreqid (void);
378 static struct mbuf *key_gather_mbuf (struct mbuf *,
379 const struct sadb_msghdr *, int, int, ...);
380 static int key_spdadd (struct socket *, struct mbuf *,
381 const struct sadb_msghdr *);
382 static u_int32_t key_getnewspid (void);
383 static int key_spddelete (struct socket *, struct mbuf *,
384 const struct sadb_msghdr *);
385 static int key_spddelete2 (struct socket *, struct mbuf *,
386 const struct sadb_msghdr *);
387 static int key_spdget (struct socket *, struct mbuf *,
388 const struct sadb_msghdr *);
389 static int key_spdflush (struct socket *, struct mbuf *,
390 const struct sadb_msghdr *);
391 static int key_spddump (struct socket *, struct mbuf *,
392 const struct sadb_msghdr *);
393 static struct mbuf *key_setdumpsp (struct secpolicy *,
394 u_int8_t, u_int32_t, u_int32_t);
395 static u_int key_getspreqmsglen (struct secpolicy *);
396 static int key_spdexpire (struct secpolicy *);
397 static struct secashead *key_newsah (struct secasindex *);
398 static void key_delsah (struct secashead *);
399 static struct secasvar *key_newsav (struct mbuf *,
400 const struct sadb_msghdr *, struct secashead *, int *);
401 static void key_delsav (struct secasvar *);
402 static struct secashead *key_getsah (struct secasindex *);
403 static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
404 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
405 static int key_setsaval (struct secasvar *, struct mbuf *,
406 const struct sadb_msghdr *);
407 static int key_mature (struct secasvar *);
408 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
409 u_int8_t, u_int32_t, u_int32_t);
410 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
411 u_int32_t, pid_t, u_int16_t);
412 static struct mbuf *key_setsadbsa (struct secasvar *);
413 static struct mbuf *key_setsadbaddr (u_int16_t,
414 struct sockaddr *, u_int8_t, u_int16_t);
415 #if 0
416 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, caddr_t,
417 int, u_int64_t);
418 #endif
419 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int32_t);
420 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
421 u_int32_t);
422 static void *key_newbuf (const void *, u_int);
423 #ifdef INET6
424 static int key_ismyaddr6 (struct sockaddr_in6 *);
425 #endif
426
427 /* flags for key_cmpsaidx() */
428 #define CMP_HEAD 1 /* protocol, addresses. */
429 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
430 #define CMP_REQID 3 /* additionally HEAD, reaid. */
431 #define CMP_EXACTLY 4 /* all elements. */
432 static int key_cmpsaidx
433 (struct secasindex *, struct secasindex *, int);
434
435 static int key_cmpspidx_exactly
436 (struct secpolicyindex *, struct secpolicyindex *);
437 static int key_cmpspidx_withmask
438 (struct secpolicyindex *, struct secpolicyindex *);
439 static int key_sockaddrcmp (struct sockaddr *, struct sockaddr *, int);
440 static int key_bbcmp (caddr_t, caddr_t, u_int);
441 static void key_srandom (void);
442 static u_int16_t key_satype2proto (u_int8_t);
443 static u_int8_t key_proto2satype (u_int16_t);
444
445 static int key_getspi (struct socket *, struct mbuf *,
446 const struct sadb_msghdr *);
447 static u_int32_t key_do_getnewspi (struct sadb_spirange *,
448 struct secasindex *);
449 static int key_update (struct socket *, struct mbuf *,
450 const struct sadb_msghdr *);
451 #ifdef IPSEC_DOSEQCHECK
452 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
453 #endif
454 static int key_add (struct socket *, struct mbuf *,
455 const struct sadb_msghdr *);
456 static int key_setident (struct secashead *, struct mbuf *,
457 const struct sadb_msghdr *);
458 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
459 const struct sadb_msghdr *);
460 static int key_delete (struct socket *, struct mbuf *,
461 const struct sadb_msghdr *);
462 static int key_get (struct socket *, struct mbuf *,
463 const struct sadb_msghdr *);
464
465 static void key_getcomb_setlifetime (struct sadb_comb *);
466 #ifdef IPSEC_ESP
467 static struct mbuf *key_getcomb_esp (void);
468 #endif
469 static struct mbuf *key_getcomb_ah (void);
470 static struct mbuf *key_getcomb_ipcomp (void);
471 static struct mbuf *key_getprop (const struct secasindex *);
472
473 static int key_acquire (struct secasindex *, struct secpolicy *);
474 #ifndef IPSEC_NONBLOCK_ACQUIRE
475 static struct secacq *key_newacq (struct secasindex *);
476 static struct secacq *key_getacq (struct secasindex *);
477 static struct secacq *key_getacqbyseq (u_int32_t);
478 #endif
479 static struct secspacq *key_newspacq (struct secpolicyindex *);
480 static struct secspacq *key_getspacq (struct secpolicyindex *);
481 static int key_acquire2 (struct socket *, struct mbuf *,
482 const struct sadb_msghdr *);
483 static int key_register (struct socket *, struct mbuf *,
484 const struct sadb_msghdr *);
485 static int key_expire (struct secasvar *);
486 static int key_flush (struct socket *, struct mbuf *,
487 const struct sadb_msghdr *);
488 static int key_dump (struct socket *, struct mbuf *,
489 const struct sadb_msghdr *);
490 static int key_promisc (struct socket *, struct mbuf *,
491 const struct sadb_msghdr *);
492 static int key_senderror (struct socket *, struct mbuf *, int);
493 static int key_validate_ext (const struct sadb_ext *, int);
494 static int key_align (struct mbuf *, struct sadb_msghdr *);
495 #if 0
496 static const char *key_getfqdn (void);
497 static const char *key_getuserfqdn (void);
498 #endif
499 static void key_sa_chgstate (struct secasvar *, u_int8_t);
500 static struct mbuf *key_alloc_mbuf (int);
501
502 /* %%% IPsec policy management */
503 /*
504 * allocating a SP for OUTBOUND or INBOUND packet.
505 * Must call key_freesp() later.
506 * OUT: NULL: not found
507 * others: found and return the pointer.
508 */
509 struct secpolicy *
510 key_allocsp(struct secpolicyindex *spidx, u_int dir)
511 {
512 struct secpolicy *sp;
513 struct timeval tv;
514
515 /* sanity check */
516 if (spidx == NULL)
517 panic("key_allocsp: NULL pointer is passed.\n");
518
519 /* check direction */
520 switch (dir) {
521 case IPSEC_DIR_INBOUND:
522 case IPSEC_DIR_OUTBOUND:
523 break;
524 default:
525 panic("key_allocsp: Invalid direction is passed.\n");
526 }
527
528 /* get a SP entry */
529 crit_enter();
530 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
531 kprintf("*** objects\n");
532 kdebug_secpolicyindex(spidx));
533
534 LIST_FOREACH(sp, &sptree[dir], chain) {
535 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
536 kprintf("*** in SPD\n");
537 kdebug_secpolicyindex(&sp->spidx));
538
539 if (sp->state == IPSEC_SPSTATE_DEAD)
540 continue;
541 if (key_cmpspidx_withmask(&sp->spidx, spidx))
542 goto found;
543 }
544
545 crit_exit();
546 return NULL;
547
548 found:
549 /* sanity check */
550 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
551
552 /* found a SPD entry */
553 microtime(&tv);
554 sp->lastused = tv.tv_sec;
555 sp->refcnt++;
556 crit_exit();
557 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
558 kprintf("DP key_allocsp cause refcnt++:%d SP:%p\n",
559 sp->refcnt, sp));
560
561 return sp;
562 }
563
564 /*
565 * return a policy that matches this particular inbound packet.
566 * XXX slow
567 */
568 struct secpolicy *
569 key_gettunnel(struct sockaddr *osrc, struct sockaddr *odst,
570 struct sockaddr *isrc, struct sockaddr *idst)
571 {
572 struct secpolicy *sp;
573 const int dir = IPSEC_DIR_INBOUND;
574 struct timeval tv;
575 struct ipsecrequest *r1, *r2, *p;
576 struct sockaddr *os, *od, *is, *id;
577 struct secpolicyindex spidx;
578
579 if (isrc->sa_family != idst->sa_family) {
580 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
581 isrc->sa_family, idst->sa_family));
582 return NULL;
583 }
584
585 crit_enter();
586 LIST_FOREACH(sp, &sptree[dir], chain) {
587 if (sp->state == IPSEC_SPSTATE_DEAD)
588 continue;
589
590 r1 = r2 = NULL;
591 for (p = sp->req; p; p = p->next) {
592 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
593 continue;
594
595 r1 = r2;
596 r2 = p;
597
598 if (!r1) {
599 /* here we look at address matches only */
600 spidx = sp->spidx;
601 if (isrc->sa_len > sizeof(spidx.src) ||
602 idst->sa_len > sizeof(spidx.dst))
603 continue;
604 bcopy(isrc, &spidx.src, isrc->sa_len);
605 bcopy(idst, &spidx.dst, idst->sa_len);
606 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
607 continue;
608 } else {
609 is = (struct sockaddr *)&r1->saidx.src;
610 id = (struct sockaddr *)&r1->saidx.dst;
611 if (key_sockaddrcmp(is, isrc, 0) ||
612 key_sockaddrcmp(id, idst, 0))
613 continue;
614 }
615
616 os = (struct sockaddr *)&r2->saidx.src;
617 od = (struct sockaddr *)&r2->saidx.dst;
618 if (key_sockaddrcmp(os, osrc, 0) ||
619 key_sockaddrcmp(od, odst, 0))
620 continue;
621
622 goto found;
623 }
624 }
625 crit_exit();
626 return NULL;
627
628 found:
629 microtime(&tv);
630 sp->lastused = tv.tv_sec;
631 sp->refcnt++;
632 crit_exit();
633 return sp;
634 }
635
636 /*
637 * allocating an SA entry for an *OUTBOUND* packet.
638 * checking each request entries in SP, and acquire an SA if need.
639 * OUT: 0: there are valid requests.
640 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
641 */
642 int
643 key_checkrequest(struct ipsecrequest *isr, struct secasindex *saidx)
644 {
645 u_int level;
646 int error;
647
648 /* sanity check */
649 if (isr == NULL || saidx == NULL)
650 panic("key_checkrequest: NULL pointer is passed.\n");
651
652 /* check mode */
653 switch (saidx->mode) {
654 case IPSEC_MODE_TRANSPORT:
655 case IPSEC_MODE_TUNNEL:
656 break;
657 case IPSEC_MODE_ANY:
658 default:
659 panic("key_checkrequest: Invalid policy defined.\n");
660 }
661
662 /* get current level */
663 level = ipsec_get_reqlevel(isr);
664
665 #if 0
666 /*
667 * We do allocate new SA only if the state of SA in the holder is
668 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
669 */
670 if (isr->sav != NULL) {
671 if (isr->sav->sah == NULL)
672 panic("key_checkrequest: sah is null.\n");
673 if (isr->sav == (struct secasvar *)LIST_FIRST(
674 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
675 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
676 kprintf("DP checkrequest calls free SA:%p\n",
677 isr->sav));
678 key_freesav(isr->sav);
679 isr->sav = NULL;
680 }
681 }
682 #else
683 /*
684 * we free any SA stashed in the IPsec request because a different
685 * SA may be involved each time this request is checked, either
686 * because new SAs are being configured, or this request is
687 * associated with an unconnected datagram socket, or this request
688 * is associated with a system default policy.
689 *
690 * The operation may have negative impact to performance. We may
691 * want to check cached SA carefully, rather than picking new SA
692 * every time.
693 */
694 if (isr->sav != NULL) {
695 key_freesav(isr->sav);
696 isr->sav = NULL;
697 }
698 #endif
699
700 /*
701 * new SA allocation if no SA found.
702 * key_allocsa_policy should allocate the oldest SA available.
703 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
704 */
705 if (isr->sav == NULL)
706 isr->sav = key_allocsa_policy(saidx);
707
708 /* When there is SA. */
709 if (isr->sav != NULL)
710 return 0;
711
712 /* there is no SA */
713 if ((error = key_acquire(saidx, isr->sp)) != 0) {
714 /* XXX What should I do ? */
715 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
716 "from key_acquire.\n", error));
717 return error;
718 }
719
720 return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
721 }
722
723 /*
724 * allocating a SA for policy entry from SAD.
725 * NOTE: searching SAD of aliving state.
726 * OUT: NULL: not found.
727 * others: found and return the pointer.
728 */
729 static struct secasvar *
730 key_allocsa_policy(struct secasindex *saidx)
731 {
732 struct secashead *sah;
733 struct secasvar *sav;
734 u_int stateidx, state;
735 const u_int *saorder_state_valid;
736 int arraysize;
737
738 LIST_FOREACH(sah, &sahtree, chain) {
739 if (sah->state == SADB_SASTATE_DEAD)
740 continue;
741 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
742 goto found;
743 }
744
745 return NULL;
746
747 found:
748
749 /*
750 * search a valid state list for outbound packet.
751 * This search order is important.
752 */
753 if (key_preferred_oldsa) {
754 saorder_state_valid = saorder_state_valid_prefer_old;
755 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
756 } else {
757 saorder_state_valid = saorder_state_valid_prefer_new;
758 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
759 }
760
761 for (stateidx = 0; stateidx < arraysize; stateidx++) {
762
763 state = saorder_state_valid[stateidx];
764
765 sav = key_do_allocsa_policy(sah, state);
766 if (sav != NULL)
767 return sav;
768 }
769
770 return NULL;
771 }
772
773 /*
774 * searching SAD with direction, protocol, mode and state.
775 * called by key_allocsa_policy().
776 * OUT:
777 * NULL : not found
778 * others : found, pointer to a SA.
779 */
780 static struct secasvar *
781 key_do_allocsa_policy(struct secashead *sah, u_int state)
782 {
783 struct secasvar *sav, *nextsav, *candidate, *d;
784
785 /* initilize */
786 candidate = NULL;
787
788 for (sav = LIST_FIRST(&sah->savtree[state]);
789 sav != NULL;
790 sav = nextsav) {
791
792 nextsav = LIST_NEXT(sav, chain);
793
794 /* sanity check */
795 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
796
797 /* initialize */
798 if (candidate == NULL) {
799 candidate = sav;
800 continue;
801 }
802
803 /* Which SA is the better ? */
804
805 /* sanity check 2 */
806 if (candidate->lft_c == NULL || sav->lft_c == NULL)
807 panic("key_do_allocsa_policy: "
808 "lifetime_current is NULL.\n");
809
810 /* What the best method is to compare ? */
811 if (key_preferred_oldsa) {
812 if (candidate->lft_c->sadb_lifetime_addtime >
813 sav->lft_c->sadb_lifetime_addtime) {
814 candidate = sav;
815 }
816 continue;
817 /*NOTREACHED*/
818 }
819
820 /* prefered new sa rather than old sa */
821 if (candidate->lft_c->sadb_lifetime_addtime <
822 sav->lft_c->sadb_lifetime_addtime) {
823 d = candidate;
824 candidate = sav;
825 } else
826 d = sav;
827
828 /*
829 * prepared to delete the SA when there is more
830 * suitable candidate and the lifetime of the SA is not
831 * permanent.
832 */
833 if (d->lft_c->sadb_lifetime_addtime != 0) {
834 struct mbuf *m, *result;
835
836 key_sa_chgstate(d, SADB_SASTATE_DEAD);
837
838 m = key_setsadbmsg(SADB_DELETE, 0,
839 d->sah->saidx.proto, 0, 0, d->refcnt - 1);
840 if (!m)
841 goto msgfail;
842 result = m;
843
844 /* set sadb_address for saidx's. */
845 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
846 (struct sockaddr *)&d->sah->saidx.src,
847 d->sah->saidx.src.ss_len << 3,
848 IPSEC_ULPROTO_ANY);
849 if (!m)
850 goto msgfail;
851 m_cat(result, m);
852
853 /* set sadb_address for saidx's. */
854 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
855 (struct sockaddr *)&d->sah->saidx.src,
856 d->sah->saidx.src.ss_len << 3,
857 IPSEC_ULPROTO_ANY);
858 if (!m)
859 goto msgfail;
860 m_cat(result, m);
861
862 /* create SA extension */
863 m = key_setsadbsa(d);
864 if (!m)
865 goto msgfail;
866 m_cat(result, m);
867
868 if (result->m_len < sizeof(struct sadb_msg)) {
869 result = m_pullup(result,
870 sizeof(struct sadb_msg));
871 if (result == NULL)
872 goto msgfail;
873 }
874
875 result->m_pkthdr.len = 0;
876 for (m = result; m; m = m->m_next)
877 result->m_pkthdr.len += m->m_len;
878 mtod(result, struct sadb_msg *)->sadb_msg_len =
879 PFKEY_UNIT64(result->m_pkthdr.len);
880
881 if (key_sendup_mbuf(NULL, result,
882 KEY_SENDUP_REGISTERED))
883 goto msgfail;
884 msgfail:
885 key_freesav(d);
886 }
887 }
888
889 if (candidate) {
890 candidate->refcnt++;
891 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
892 kprintf("DP allocsa_policy cause "
893 "refcnt++:%d SA:%p\n",
894 candidate->refcnt, candidate));
895 }
896 return candidate;
897 }
898
899 /*
900 * allocating a SA entry for a *INBOUND* packet.
901 * Must call key_freesav() later.
902 * OUT: positive: pointer to a sav.
903 * NULL: not found, or error occured.
904 *
905 * In the comparison, source address will be ignored for RFC2401 conformance.
906 * To quote, from section 4.1:
907 * A security association is uniquely identified by a triple consisting
908 * of a Security Parameter Index (SPI), an IP Destination Address, and a
909 * security protocol (AH or ESP) identifier.
910 * Note that, however, we do need to keep source address in IPsec SA.
911 * IKE specification and PF_KEY specification do assume that we
912 * keep source address in IPsec SA. We see a tricky situation here.
913 */
914 struct secasvar *
915 key_allocsa(u_int family, caddr_t src, caddr_t dst, u_int proto,
916 u_int32_t spi)
917 {
918 struct secashead *sah;
919 struct secasvar *sav;
920 u_int stateidx, state;
921 struct sockaddr_in sin;
922 struct sockaddr_in6 sin6;
923 const u_int *saorder_state_valid;
924 int arraysize;
925
926 /* sanity check */
927 if (src == NULL || dst == NULL)
928 panic("key_allocsa: NULL pointer is passed.\n");
929
930 /*
931 * when both systems employ similar strategy to use a SA.
932 * the search order is important even in the inbound case.
933 */
934 if (key_preferred_oldsa) {
935 saorder_state_valid = saorder_state_valid_prefer_old;
936 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
937 } else {
938 saorder_state_valid = saorder_state_valid_prefer_new;
939 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
940 }
941
942 /*
943 * searching SAD.
944 * XXX: to be checked internal IP header somewhere. Also when
945 * IPsec tunnel packet is received. But ESP tunnel mode is
946 * encrypted so we can't check internal IP header.
947 */
948 crit_enter();
949 LIST_FOREACH(sah, &sahtree, chain) {
950 /*
951 * search a valid state list for inbound packet.
952 * the search order is not important.
953 */
954 for (stateidx = 0; stateidx < arraysize; stateidx++) {
955 state = saorder_state_valid[stateidx];
956 LIST_FOREACH(sav, &sah->savtree[state], chain) {
957 /* sanity check */
958 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
959 if (proto != sav->sah->saidx.proto)
960 continue;
961 if (spi != sav->spi)
962 continue;
963 if (family != sav->sah->saidx.src.ss_family ||
964 family != sav->sah->saidx.dst.ss_family)
965 continue;
966
967 #if 0 /* don't check src */
968 /* check src address */
969 switch (family) {
970 case AF_INET:
971 bzero(&sin, sizeof(sin));
972 sin.sin_family = AF_INET;
973 sin.sin_len = sizeof(sin);
974 bcopy(src, &sin.sin_addr,
975 sizeof(sin.sin_addr));
976 if (key_sockaddrcmp((struct sockaddr*)&sin,
977 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
978 continue;
979
980 break;
981 case AF_INET6:
982 bzero(&sin6, sizeof(sin6));
983 sin6.sin6_family = AF_INET6;
984 sin6.sin6_len = sizeof(sin6);
985 bcopy(src, &sin6.sin6_addr,
986 sizeof(sin6.sin6_addr));
987 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
988 /* kame fake scopeid */
989 sin6.sin6_scope_id =
990 ntohs(sin6.sin6_addr.s6_addr16[1]);
991 sin6.sin6_addr.s6_addr16[1] = 0;
992 }
993 if (key_sockaddrcmp((struct sockaddr*)&sin6,
994 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
995 continue;
996 break;
997 default:
998 ipseclog((LOG_DEBUG, "key_allocsa: "
999 "unknown address family=%d.\n",
1000 family));
1001 continue;
1002 }
1003
1004 #endif
1005 /* check dst address */
1006 switch (family) {
1007 case AF_INET:
1008 bzero(&sin, sizeof(sin));
1009 sin.sin_family = AF_INET;
1010 sin.sin_len = sizeof(sin);
1011 bcopy(dst, &sin.sin_addr,
1012 sizeof(sin.sin_addr));
1013 if (key_sockaddrcmp((struct sockaddr*)&sin,
1014 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1015 continue;
1016
1017 break;
1018 case AF_INET6:
1019 bzero(&sin6, sizeof(sin6));
1020 sin6.sin6_family = AF_INET6;
1021 sin6.sin6_len = sizeof(sin6);
1022 bcopy(dst, &sin6.sin6_addr,
1023 sizeof(sin6.sin6_addr));
1024 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1025 /* kame fake scopeid */
1026 sin6.sin6_scope_id =
1027 ntohs(sin6.sin6_addr.s6_addr16[1]);
1028 sin6.sin6_addr.s6_addr16[1] = 0;
1029 }
1030 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1031 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1032 continue;
1033 break;
1034 default:
1035 ipseclog((LOG_DEBUG, "key_allocsa: "
1036 "unknown address family=%d.\n",
1037 family));
1038 continue;
1039 }
1040
1041 goto found;
1042 }
1043 }
1044 }
1045
1046 /* not found */
1047 crit_exit();
1048 return NULL;
1049
1050 found:
1051 sav->refcnt++;
1052 crit_exit();
1053 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1054 kprintf("DP allocsa cause refcnt++:%d SA:%p\n",
1055 sav->refcnt, sav));
1056 return sav;
1057 }
1058
1059 /*
1060 * Must be called after calling key_allocsp().
1061 * For both the packet without socket and key_freeso().
1062 */
1063 void
1064 key_freesp(struct secpolicy *sp)
1065 {
1066 /* sanity check */
1067 if (sp == NULL)
1068 panic("key_freesp: NULL pointer is passed.\n");
1069
1070 sp->refcnt--;
1071 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1072 kprintf("DP freesp cause refcnt--:%d SP:%p\n",
1073 sp->refcnt, sp));
1074
1075 if (sp->refcnt == 0)
1076 key_delsp(sp);
1077
1078 return;
1079 }
1080
1081 /*
1082 * Must be called after calling key_allocsp().
1083 * For the packet with socket.
1084 */
1085 void
1086 key_freeso(struct socket *so)
1087 {
1088 /* sanity check */
1089 if (so == NULL)
1090 panic("key_freeso: NULL pointer is passed.\n");
1091
1092 switch (so->so_proto->pr_domain->dom_family) {
1093 #ifdef INET
1094 case PF_INET:
1095 {
1096 struct inpcb *pcb = so->so_pcb;
1097
1098 /* Does it have a PCB ? */
1099 if (pcb == NULL)
1100 return;
1101 key_freesp_so(&pcb->inp_sp->sp_in);
1102 key_freesp_so(&pcb->inp_sp->sp_out);
1103 }
1104 break;
1105 #endif
1106 #ifdef INET6
1107 case PF_INET6:
1108 {
1109 #ifdef HAVE_NRL_INPCB
1110 struct inpcb *pcb = so->so_pcb;
1111
1112 /* Does it have a PCB ? */
1113 if (pcb == NULL)
1114 return;
1115 key_freesp_so(&pcb->inp_sp->sp_in);
1116 key_freesp_so(&pcb->inp_sp->sp_out);
1117 #else
1118 struct in6pcb *pcb = so->so_pcb;
1119
1120 /* Does it have a PCB ? */
1121 if (pcb == NULL)
1122 return;
1123 key_freesp_so(&pcb->in6p_sp->sp_in);
1124 key_freesp_so(&pcb->in6p_sp->sp_out);
1125 #endif
1126 }
1127 break;
1128 #endif /* INET6 */
1129 default:
1130 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1131 so->so_proto->pr_domain->dom_family));
1132 return;
1133 }
1134
1135 return;
1136 }
1137
1138 static void
1139 key_freesp_so(struct secpolicy **sp)
1140 {
1141 /* sanity check */
1142 if (sp == NULL || *sp == NULL)
1143 panic("key_freesp_so: sp == NULL\n");
1144
1145 switch ((*sp)->policy) {
1146 case IPSEC_POLICY_IPSEC:
1147 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1148 kprintf("DP freeso calls free SP:%p\n", *sp));
1149 key_freesp(*sp);
1150 *sp = NULL;
1151 break;
1152 case IPSEC_POLICY_ENTRUST:
1153 case IPSEC_POLICY_BYPASS:
1154 return;
1155 default:
1156 panic("key_freesp_so: Invalid policy found %d", (*sp)->policy);
1157 }
1158
1159 return;
1160 }
1161
1162 /*
1163 * Must be called after calling key_allocsa().
1164 * This function is called by key_freesp() to free some SA allocated
1165 * for a policy.
1166 */
1167 void
1168 key_freesav(struct secasvar *sav)
1169 {
1170 /* sanity check */
1171 if (sav == NULL)
1172 panic("key_freesav: NULL pointer is passed.\n");
1173
1174 sav->refcnt--;
1175 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1176 kprintf("DP freesav cause refcnt--:%d SA:%p SPI %u\n",
1177 sav->refcnt, sav, (u_int32_t)ntohl(sav->spi)));
1178
1179 if (sav->refcnt == 0)
1180 key_delsav(sav);
1181
1182 return;
1183 }
1184
1185 /* %%% SPD management */
1186 /*
1187 * free security policy entry.
1188 */
1189 static void
1190 key_delsp(struct secpolicy *sp)
1191 {
1192 /* sanity check */
1193 if (sp == NULL)
1194 panic("key_delsp: NULL pointer is passed.\n");
1195
1196 sp->state = IPSEC_SPSTATE_DEAD;
1197
1198 if (sp->refcnt > 0)
1199 return; /* can't free */
1200
1201 crit_enter();
1202 /* remove from SP index */
1203 if (__LIST_CHAINED(sp))
1204 LIST_REMOVE(sp, chain);
1205
1206 {
1207 struct ipsecrequest *isr = sp->req, *nextisr;
1208
1209 while (isr != NULL) {
1210 if (isr->sav != NULL) {
1211 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1212 kprintf("DP delsp calls free SA:%p\n",
1213 isr->sav));
1214 key_freesav(isr->sav);
1215 isr->sav = NULL;
1216 }
1217
1218 nextisr = isr->next;
1219 KFREE(isr);
1220 isr = nextisr;
1221 }
1222 }
1223
1224 keydb_delsecpolicy(sp);
1225
1226 crit_exit();
1227
1228 return;
1229 }
1230
1231 /*
1232 * search SPD
1233 * OUT: NULL : not found
1234 * others : found, pointer to a SP.
1235 */
1236 static struct secpolicy *
1237 key_getsp(struct secpolicyindex *spidx)
1238 {
1239 struct secpolicy *sp;
1240
1241 /* sanity check */
1242 if (spidx == NULL)
1243 panic("key_getsp: NULL pointer is passed.\n");
1244
1245 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1246 if (sp->state == IPSEC_SPSTATE_DEAD)
1247 continue;
1248 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1249 sp->refcnt++;
1250 return sp;
1251 }
1252 }
1253
1254 return NULL;
1255 }
1256
1257 /*
1258 * get SP by index.
1259 * OUT: NULL : not found
1260 * others : found, pointer to a SP.
1261 */
1262 static struct secpolicy *
1263 key_getspbyid(u_int32_t id)
1264 {
1265 struct secpolicy *sp;
1266
1267 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1268 if (sp->state == IPSEC_SPSTATE_DEAD)
1269 continue;
1270 if (sp->id == id) {
1271 sp->refcnt++;
1272 return sp;
1273 }
1274 }
1275
1276 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1277 if (sp->state == IPSEC_SPSTATE_DEAD)
1278 continue;
1279 if (sp->id == id) {
1280 sp->refcnt++;
1281 return sp;
1282 }
1283 }
1284
1285 return NULL;
1286 }
1287
1288 struct secpolicy *
1289 key_newsp(void)
1290 {
1291 struct secpolicy *newsp = NULL;
1292
1293 newsp = keydb_newsecpolicy();
1294 if (!newsp)
1295 return newsp;
1296
1297 newsp->refcnt = 1;
1298 newsp->req = NULL;
1299
1300 return newsp;
1301 }
1302
1303 /*
1304 * create secpolicy structure from sadb_x_policy structure.
1305 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1306 * so must be set properly later.
1307 */
1308 struct secpolicy *
1309 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1310 {
1311 struct secpolicy *newsp;
1312
1313 /* sanity check */
1314 if (xpl0 == NULL)
1315 panic("key_msg2sp: NULL pointer was passed.\n");
1316 if (len < sizeof(*xpl0))
1317 panic("key_msg2sp: invalid length.\n");
1318 if (len != PFKEY_EXTLEN(xpl0)) {
1319 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1320 *error = EINVAL;
1321 return NULL;
1322 }
1323
1324 if ((newsp = key_newsp()) == NULL) {
1325 *error = ENOBUFS;
1326 return NULL;
1327 }
1328
1329 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1330 newsp->policy = xpl0->sadb_x_policy_type;
1331
1332 /* check policy */
1333 switch (xpl0->sadb_x_policy_type) {
1334 case IPSEC_POLICY_DISCARD:
1335 case IPSEC_POLICY_NONE:
1336 case IPSEC_POLICY_ENTRUST:
1337 case IPSEC_POLICY_BYPASS:
1338 newsp->req = NULL;
1339 break;
1340
1341 case IPSEC_POLICY_IPSEC:
1342 {
1343 int tlen;
1344 struct sadb_x_ipsecrequest *xisr;
1345 struct ipsecrequest **p_isr = &newsp->req;
1346
1347 /* validity check */
1348 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1349 ipseclog((LOG_DEBUG,
1350 "key_msg2sp: Invalid msg length.\n"));
1351 key_freesp(newsp);
1352 *error = EINVAL;
1353 return NULL;
1354 }
1355
1356 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1357 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1358
1359 while (tlen > 0) {
1360
1361 /* length check */
1362 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1363 ipseclog((LOG_DEBUG, "key_msg2sp: "
1364 "invalid ipsecrequest length.\n"));
1365 key_freesp(newsp);
1366 *error = EINVAL;
1367 return NULL;
1368 }
1369
1370 /* allocate request buffer */
1371 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1372 if ((*p_isr) == NULL) {
1373 ipseclog((LOG_DEBUG,
1374 "key_msg2sp: No more memory.\n"));
1375 key_freesp(newsp);
1376 *error = ENOBUFS;
1377 return NULL;
1378 }
1379 bzero(*p_isr, sizeof(**p_isr));
1380
1381 /* set values */
1382 (*p_isr)->next = NULL;
1383
1384 switch (xisr->sadb_x_ipsecrequest_proto) {
1385 case IPPROTO_ESP:
1386 case IPPROTO_AH:
1387 case IPPROTO_IPCOMP:
1388 break;
1389 default:
1390 ipseclog((LOG_DEBUG,
1391 "key_msg2sp: invalid proto type=%u\n",
1392 xisr->sadb_x_ipsecrequest_proto));
1393 key_freesp(newsp);
1394 *error = EPROTONOSUPPORT;
1395 return NULL;
1396 }
1397 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1398
1399 switch (xisr->sadb_x_ipsecrequest_mode) {
1400 case IPSEC_MODE_TRANSPORT:
1401 case IPSEC_MODE_TUNNEL:
1402 break;
1403 case IPSEC_MODE_ANY:
1404 default:
1405 ipseclog((LOG_DEBUG,
1406 "key_msg2sp: invalid mode=%u\n",
1407 xisr->sadb_x_ipsecrequest_mode));
1408 key_freesp(newsp);
1409 *error = EINVAL;
1410 return NULL;
1411 }
1412 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1413
1414 switch (xisr->sadb_x_ipsecrequest_level) {
1415 case IPSEC_LEVEL_DEFAULT:
1416 case IPSEC_LEVEL_USE:
1417 case IPSEC_LEVEL_REQUIRE:
1418 break;
1419 case IPSEC_LEVEL_UNIQUE:
1420 /* validity check */
1421 /*
1422 * If range violation of reqid, kernel will
1423 * update it, don't refuse it.
1424 */
1425 if (xisr->sadb_x_ipsecrequest_reqid
1426 > IPSEC_MANUAL_REQID_MAX) {
1427 ipseclog((LOG_DEBUG,
1428 "key_msg2sp: reqid=%d range "
1429 "violation, updated by kernel.\n",
1430 xisr->sadb_x_ipsecrequest_reqid));
1431 xisr->sadb_x_ipsecrequest_reqid = 0;
1432 }
1433
1434 /* allocate new reqid id if reqid is zero. */
1435 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1436 u_int32_t reqid;
1437 if ((reqid = key_newreqid()) == 0) {
1438 key_freesp(newsp);
1439 *error = ENOBUFS;
1440 return NULL;
1441 }
1442 (*p_isr)->saidx.reqid = reqid;
1443 xisr->sadb_x_ipsecrequest_reqid = reqid;
1444 } else {
1445 /* set it for manual keying. */
1446 (*p_isr)->saidx.reqid =
1447 xisr->sadb_x_ipsecrequest_reqid;
1448 }
1449 break;
1450
1451 default:
1452 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1453 xisr->sadb_x_ipsecrequest_level));
1454 key_freesp(newsp);
1455 *error = EINVAL;
1456 return NULL;
1457 }
1458 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1459
1460 /* set IP addresses if there */
1461 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1462 struct sockaddr *paddr;
1463
1464 paddr = (struct sockaddr *)(xisr + 1);
1465
1466 /* validity check */
1467 if (paddr->sa_len
1468 > sizeof((*p_isr)->saidx.src)) {
1469 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1470 "address length.\n"));
1471 key_freesp(newsp);
1472 *error = EINVAL;
1473 return NULL;
1474 }
1475 bcopy(paddr, &(*p_isr)->saidx.src,
1476 paddr->sa_len);
1477
1478 paddr = (struct sockaddr *)((caddr_t)paddr
1479 + paddr->sa_len);
1480
1481 /* validity check */
1482 if (paddr->sa_len
1483 > sizeof((*p_isr)->saidx.dst)) {
1484 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1485 "address length.\n"));
1486 key_freesp(newsp);
1487 *error = EINVAL;
1488 return NULL;
1489 }
1490 bcopy(paddr, &(*p_isr)->saidx.dst,
1491 paddr->sa_len);
1492 }
1493
1494 (*p_isr)->sav = NULL;
1495 (*p_isr)->sp = newsp;
1496
1497 /* initialization for the next. */
1498 p_isr = &(*p_isr)->next;
1499 tlen -= xisr->sadb_x_ipsecrequest_len;
1500
1501 /* validity check */
1502 if (tlen < 0) {
1503 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1504 key_freesp(newsp);
1505 *error = EINVAL;
1506 return NULL;
1507 }
1508
1509 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1510 + xisr->sadb_x_ipsecrequest_len);
1511 }
1512 }
1513 break;
1514 default:
1515 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1516 key_freesp(newsp);
1517 *error = EINVAL;
1518 return NULL;
1519 }
1520
1521 *error = 0;
1522 return newsp;
1523 }
1524
1525 static u_int32_t
1526 key_newreqid(void)
1527 {
1528 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1529
1530 auto_reqid = (auto_reqid == ~0
1531 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1532
1533 /* XXX should be unique check */
1534
1535 return auto_reqid;
1536 }
1537
1538 /*
1539 * copy secpolicy struct to sadb_x_policy structure indicated.
1540 */
1541 struct mbuf *
1542 key_sp2msg(struct secpolicy *sp)
1543 {
1544 struct sadb_x_policy *xpl;
1545 int tlen;
1546 caddr_t p;
1547 struct mbuf *m;
1548
1549 /* sanity check. */
1550 if (sp == NULL)
1551 panic("key_sp2msg: NULL pointer was passed.\n");
1552
1553 tlen = key_getspreqmsglen(sp);
1554
1555 m = key_alloc_mbuf(tlen);
1556 if (!m || m->m_next) { /*XXX*/
1557 if (m)
1558 m_freem(m);
1559 return NULL;
1560 }
1561
1562 m->m_len = tlen;
1563 m->m_next = NULL;
1564 xpl = mtod(m, struct sadb_x_policy *);
1565 bzero(xpl, tlen);
1566
1567 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1568 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1569 xpl->sadb_x_policy_type = sp->policy;
1570 xpl->sadb_x_policy_dir = sp->spidx.dir;
1571 xpl->sadb_x_policy_id = sp->id;
1572 p = (caddr_t)xpl + sizeof(*xpl);
1573
1574 /* if is the policy for ipsec ? */
1575 if (sp->policy == IPSEC_POLICY_IPSEC) {
1576 struct sadb_x_ipsecrequest *xisr;
1577 struct ipsecrequest *isr;
1578
1579 for (isr = sp->req; isr != NULL; isr = isr->next) {
1580
1581 xisr = (struct sadb_x_ipsecrequest *)p;
1582
1583 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1584 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1585 xisr->sadb_x_ipsecrequest_level = isr->level;
1586 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1587
1588 p += sizeof(*xisr);
1589 bcopy(&isr->saidx.src, p, isr->saidx.src.ss_len);
1590 p += isr->saidx.src.ss_len;
1591 bcopy(&isr->saidx.dst, p, isr->saidx.dst.ss_len);
1592 p += isr->saidx.src.ss_len;
1593
1594 xisr->sadb_x_ipsecrequest_len =
1595 PFKEY_ALIGN8(sizeof(*xisr)
1596 + isr->saidx.src.ss_len
1597 + isr->saidx.dst.ss_len);
1598 }
1599 }
1600
1601 return m;
1602 }
1603
1604 /* m will not be freed nor modified */
1605 static struct mbuf *
1606 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1607 int ndeep, int nitem, ...)
1608 {
1609 __va_list ap;
1610 int idx;
1611 int i;
1612 struct mbuf *result = NULL, *n;
1613 int len;
1614
1615 if (m == NULL || mhp == NULL)
1616 panic("null pointer passed to key_gather");
1617
1618 __va_start(ap, nitem);
1619 for (i = 0; i < nitem; i++) {
1620 idx = __va_arg(ap, int);
1621 if (idx < 0 || idx > SADB_EXT_MAX)
1622 goto fail;
1623 /* don't attempt to pull empty extension */
1624 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1625 continue;
1626 if (idx != SADB_EXT_RESERVED &&
1627 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1628 continue;
1629
1630 if (idx == SADB_EXT_RESERVED) {
1631 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1632 #ifdef DIAGNOSTIC
1633 if (len > MHLEN)
1634 panic("assumption failed");
1635 #endif
1636 MGETHDR(n, MB_DONTWAIT, MT_DATA);
1637 if (!n)
1638 goto fail;
1639 n->m_len = len;
1640 n->m_next = NULL;
1641 m_copydata(m, 0, sizeof(struct sadb_msg),
1642 mtod(n, caddr_t));
1643 } else if (i < ndeep) {
1644 len = mhp->extlen[idx];
1645 n = key_alloc_mbuf(len);
1646 if (!n || n->m_next) { /*XXX*/
1647 if (n)
1648 m_freem(n);
1649 goto fail;
1650 }
1651 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1652 mtod(n, caddr_t));
1653 } else {
1654 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1655 MB_DONTWAIT);
1656 }
1657 if (n == NULL)
1658 goto fail;
1659
1660 if (result)
1661 m_cat(result, n);
1662 else
1663 result = n;
1664 }
1665 __va_end(ap);
1666
1667 if ((result->m_flags & M_PKTHDR) != 0) {
1668 result->m_pkthdr.len = 0;
1669 for (n = result; n; n = n->m_next)
1670 result->m_pkthdr.len += n->m_len;
1671 }
1672
1673 return result;
1674
1675 fail:
1676 m_freem(result);
1677 return NULL;
1678 }
1679
1680 /*
1681 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1682 * add a entry to SP database, when received
1683 * <base, address(SD), (lifetime(H),) policy>
1684 * from the user(?).
1685 * Adding to SP database,
1686 * and send
1687 * <base, address(SD), (lifetime(H),) policy>
1688 * to the socket which was send.
1689 *
1690 * SPDADD set a unique policy entry.
1691 * SPDSETIDX like SPDADD without a part of policy requests.
1692 * SPDUPDATE replace a unique policy entry.
1693 *
1694 * m will always be freed.
1695 */
1696 static int
1697 key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
1698 {
1699 struct sadb_address *src0, *dst0;
1700 struct sadb_x_policy *xpl0, *xpl;
1701 struct sadb_lifetime *lft = NULL;
1702 struct secpolicyindex spidx;
1703 struct secpolicy *newsp;
1704 struct timeval tv;
1705 int error;
1706
1707 /* sanity check */
1708 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1709 panic("key_spdadd: NULL pointer is passed.\n");
1710
1711 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1712 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1713 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1714 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1715 return key_senderror(so, m, EINVAL);
1716 }
1717 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1718 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1719 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1720 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1721 return key_senderror(so, m, EINVAL);
1722 }
1723 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1724 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1725 < sizeof(struct sadb_lifetime)) {
1726 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1727 return key_senderror(so, m, EINVAL);
1728 }
1729 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1730 }
1731
1732 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1733 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1734 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1735
1736 /* make secindex */
1737 /* XXX boundary check against sa_len */
1738 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1739 src0 + 1,
1740 dst0 + 1,
1741 src0->sadb_address_prefixlen,
1742 dst0->sadb_address_prefixlen,
1743 src0->sadb_address_proto,
1744 &spidx);
1745
1746 /* checking the direciton. */
1747 switch (xpl0->sadb_x_policy_dir) {
1748 case IPSEC_DIR_INBOUND:
1749 case IPSEC_DIR_OUTBOUND:
1750 break;
1751 default:
1752 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1753 mhp->msg->sadb_msg_errno = EINVAL;
1754 return 0;
1755 }
1756
1757 /* check policy */
1758 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1759 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1760 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1761 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1762 return key_senderror(so, m, EINVAL);
1763 }
1764
1765 /* policy requests are mandatory when action is ipsec. */
1766 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1767 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1768 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1769 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1770 return key_senderror(so, m, EINVAL);
1771 }
1772
1773 /*
1774 * checking there is SP already or not.
1775 * SPDUPDATE doesn't depend on whether there is a SP or not.
1776 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1777 * then error.
1778 */
1779 newsp = key_getsp(&spidx);
1780 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1781 if (newsp) {
1782 newsp->state = IPSEC_SPSTATE_DEAD;
1783 key_freesp(newsp);
1784 }
1785 } else {
1786 if (newsp != NULL) {
1787 key_freesp(newsp);
1788 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1789 return key_senderror(so, m, EEXIST);
1790 }
1791 }
1792
1793 /* allocation new SP entry */
1794 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1795 return key_senderror(so, m, error);
1796 }
1797
1798 if ((newsp->id = key_getnewspid()) == 0) {
1799 keydb_delsecpolicy(newsp);
1800 return key_senderror(so, m, ENOBUFS);
1801 }
1802
1803 /* XXX boundary check against sa_len */
1804 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1805 src0 + 1,
1806 dst0 + 1,
1807 src0->sadb_address_prefixlen,
1808 dst0->sadb_address_prefixlen,
1809 src0->sadb_address_proto,
1810 &newsp->spidx);
1811
1812 /* sanity check on addr pair */
1813 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1814 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1815 keydb_delsecpolicy(newsp);
1816 return key_senderror(so, m, EINVAL);
1817 }
1818 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1819 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1820 keydb_delsecpolicy(newsp);
1821 return key_senderror(so, m, EINVAL);
1822 }
1823 #if 1
1824 if (newsp->req && newsp->req->saidx.src.ss_family) {
1825 struct sockaddr *sa;
1826 sa = (struct sockaddr *)(src0 + 1);
1827 if (sa->sa_family != newsp->req->saidx.src.ss_family) {
1828 keydb_delsecpolicy(newsp);
1829 return key_senderror(so, m, EINVAL);
1830 }
1831 }
1832 if (newsp->req && newsp->req->saidx.dst.ss_family) {
1833 struct sockaddr *sa;
1834 sa = (struct sockaddr *)(dst0 + 1);
1835 if (sa->sa_family != newsp->req->saidx.dst.ss_family) {
1836 keydb_delsecpolicy(newsp);
1837 return key_senderror(so, m, EINVAL);
1838 }
1839 }
1840 #endif
1841
1842 microtime(&tv);
1843 newsp->created = tv.tv_sec;
1844 newsp->lastused = tv.tv_sec;
1845 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1846 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1847
1848 newsp->refcnt = 1; /* do not reclaim until I say I do */
1849 newsp->state = IPSEC_SPSTATE_ALIVE;
1850 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1851
1852 /* delete the entry in spacqtree */
1853 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1854 struct secspacq *spacq;
1855 if ((spacq = key_getspacq(&spidx)) != NULL) {
1856 /* reset counter in order to deletion by timehandler. */
1857 microtime(&tv);
1858 spacq->created = tv.tv_sec;
1859 spacq->count = 0;
1860 }
1861 }
1862
1863 {
1864 struct mbuf *n, *mpolicy;
1865 struct sadb_msg *newmsg;
1866 int off;
1867
1868 /* create new sadb_msg to reply. */
1869 if (lft) {
1870 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1871 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1872 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1873 } else {
1874 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1875 SADB_X_EXT_POLICY,
1876 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1877 }
1878 if (!n)
1879 return key_senderror(so, m, ENOBUFS);
1880
1881 if (n->m_len < sizeof(*newmsg)) {
1882 n = m_pullup(n, sizeof(*newmsg));
1883 if (!n)
1884 return key_senderror(so, m, ENOBUFS);
1885 }
1886 newmsg = mtod(n, struct sadb_msg *);
1887 newmsg->sadb_msg_errno = 0;
1888 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1889
1890 off = 0;
1891 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1892 sizeof(*xpl), &off);
1893 if (mpolicy == NULL) {
1894 /* n is already freed */
1895 return key_senderror(so, m, ENOBUFS);
1896 }
1897 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1898 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1899 m_freem(n);
1900 return key_senderror(so, m, EINVAL);
1901 }
1902 xpl->sadb_x_policy_id = newsp->id;
1903
1904 m_freem(m);
1905 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1906 }
1907 }
1908
1909 /*
1910 * get new policy id.
1911 * OUT:
1912 * 0: failure.
1913 * others: success.
1914 */
1915 static u_int32_t
1916 key_getnewspid(void)
1917 {
1918 u_int32_t newid = 0;
1919 int count = key_spi_trycnt; /* XXX */
1920 struct secpolicy *sp;
1921
1922 /* when requesting to allocate spi ranged */
1923 while (count--) {
1924 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1925
1926 if ((sp = key_getspbyid(newid)) == NULL)
1927 break;
1928
1929 key_freesp(sp);
1930 }
1931
1932 if (count == 0 || newid == 0) {
1933 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1934 return 0;
1935 }
1936
1937 return newid;
1938 }
1939
1940 /*
1941 * SADB_SPDDELETE processing
1942 * receive
1943 * <base, address(SD), policy(*)>
1944 * from the user(?), and set SADB_SASTATE_DEAD,
1945 * and send,
1946 * <base, address(SD), policy(*)>
1947 * to the ikmpd.
1948 * policy(*) including direction of policy.
1949 *
1950 * m will always be freed.
1951 */
1952 static int
1953 key_spddelete(struct socket *so, struct mbuf *m,
1954 const struct sadb_msghdr *mhp)
1955 {
1956 struct sadb_address *src0, *dst0;
1957 struct sadb_x_policy *xpl0;
1958 struct secpolicyindex spidx;
1959 struct secpolicy *sp;
1960
1961 /* sanity check */
1962 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1963 panic("key_spddelete: NULL pointer is passed.\n");
1964
1965 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1966 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1967 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1968 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1969 return key_senderror(so, m, EINVAL);
1970 }
1971 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1972 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1973 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1974 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1975 return key_senderror(so, m, EINVAL);
1976 }
1977
1978 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1979 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1980 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1981
1982 /* make secindex */
1983 /* XXX boundary check against sa_len */
1984 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1985 src0 + 1,
1986 dst0 + 1,
1987 src0->sadb_address_prefixlen,
1988 dst0->sadb_address_prefixlen,
1989 src0->sadb_address_proto,
1990 &spidx);
1991
1992 /* checking the direciton. */
1993 switch (xpl0->sadb_x_policy_dir) {
1994 case IPSEC_DIR_INBOUND:
1995 case IPSEC_DIR_OUTBOUND:
1996 break;
1997 default:
1998 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
1999 return key_senderror(so, m, EINVAL);
2000 }
2001
2002 /* Is there SP in SPD ? */
2003 if ((sp = key_getsp(&spidx)) == NULL) {
2004 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2005 return key_senderror(so, m, EINVAL);
2006 }
2007
2008 /* save policy id to buffer to be returned. */
2009 xpl0->sadb_x_policy_id = sp->id;
2010
2011 sp->state = IPSEC_SPSTATE_DEAD;
2012 key_freesp(sp);
2013
2014 {
2015 struct mbuf *n;
2016 struct sadb_msg *newmsg;
2017
2018 /* create new sadb_msg to reply. */
2019 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2020 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2021 if (!n)
2022 return key_senderror(so, m, ENOBUFS);
2023
2024 newmsg = mtod(n, struct sadb_msg *);
2025 newmsg->sadb_msg_errno = 0;
2026 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2027
2028 m_freem(m);
2029 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2030 }
2031 }
2032
2033 /*
2034 * SADB_SPDDELETE2 processing
2035 * receive
2036 * <base, policy(*)>
2037 * from the user(?), and set SADB_SASTATE_DEAD,
2038 * and send,
2039 * <base, policy(*)>
2040 * to the ikmpd.
2041 * policy(*) including direction of policy.
2042 *
2043 * m will always be freed.
2044 */
2045 static int
2046 key_spddelete2(struct socket *so, struct mbuf *m,
2047 const struct sadb_msghdr *mhp)
2048 {
2049 u_int32_t id;
2050 struct secpolicy *sp;
2051
2052 /* sanity check */
2053 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2054 panic("key_spddelete2: NULL pointer is passed.\n");
2055
2056 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2057 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2058 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2059 key_senderror(so, m, EINVAL);
2060 return 0;
2061 }
2062
2063 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2064
2065 /* Is there SP in SPD ? */
2066 if ((sp = key_getspbyid(id)) == NULL) {
2067 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2068 key_senderror(so, m, EINVAL);
2069 }
2070
2071 sp->state = IPSEC_SPSTATE_DEAD;
2072 key_freesp(sp);
2073
2074 {
2075 struct mbuf *n, *nn;
2076 struct sadb_msg *newmsg;
2077 int off, len;
2078
2079 /* create new sadb_msg to reply. */
2080 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2081
2082 if (len > MCLBYTES)
2083 return key_senderror(so, m, ENOBUFS);
2084 MGETHDR(n, MB_DONTWAIT, MT_DATA);
2085 if (n && len > MHLEN) {
2086 MCLGET(n, MB_DONTWAIT);
2087 if ((n->m_flags & M_EXT) == 0) {
2088 m_freem(n);
2089 n = NULL;
2090 }
2091 }
2092 if (!n)
2093 return key_senderror(so, m, ENOBUFS);
2094
2095 n->m_len = len;
2096 n->m_next = NULL;
2097 off = 0;
2098
2099 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2100 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2101
2102 #ifdef DIAGNOSTIC
2103 if (off != len)
2104 panic("length inconsistency in key_spddelete2");
2105 #endif
2106
2107 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2108 mhp->extlen[SADB_X_EXT_POLICY], MB_DONTWAIT);
2109 if (!n->m_next) {
2110 m_freem(n);
2111 return key_senderror(so, m, ENOBUFS);
2112 }
2113
2114 n->m_pkthdr.len = 0;
2115 for (nn = n; nn; nn = nn->m_next)
2116 n->m_pkthdr.len += nn->m_len;
2117
2118 newmsg = mtod(n, struct sadb_msg *);
2119 newmsg->sadb_msg_errno = 0;
2120 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2121
2122 m_freem(m);
2123 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2124 }
2125 }
2126
2127 /*
2128 * SADB_X_GET processing
2129 * receive
2130 * <base, policy(*)>
2131 * from the user(?),
2132 * and send,
2133 * <base, address(SD), policy>
2134 * to the ikmpd.
2135 * policy(*) including direction of policy.
2136 *
2137 * m will always be freed.
2138 */
2139 static int
2140 key_spdget(struct socket *so, struct mbuf *m,
2141 const struct sadb_msghdr *mhp)
2142 {
2143 u_int32_t id;
2144 struct secpolicy *sp;
2145 struct mbuf *n;
2146
2147 /* sanity check */
2148 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2149 panic("key_spdget: NULL pointer is passed.\n");
2150
2151 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2152 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2153 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2154 return key_senderror(so, m, EINVAL);
2155 }
2156
2157 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2158
2159 /* Is there SP in SPD ? */
2160 if ((sp = key_getspbyid(id)) == NULL) {
2161 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2162 return key_senderror(so, m, ENOENT);
2163 }
2164
2165 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2166 if (n != NULL) {
2167 m_freem(m);
2168 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2169 } else
2170 return key_senderror(so, m, ENOBUFS);
2171 }
2172
2173 /*
2174 * SADB_X_SPDACQUIRE processing.
2175 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2176 * send
2177 * <base, policy(*)>
2178 * to KMD, and expect to receive
2179 * <base> with SADB_X_SPDACQUIRE if error occured,
2180 * or
2181 * <base, policy>
2182 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2183 * policy(*) is without policy requests.
2184 *
2185 * 0 : succeed
2186 * others: error number
2187 */
2188 int
2189 key_spdacquire(struct secpolicy *sp)
2190 {
2191 struct mbuf *result = NULL, *m;
2192 struct secspacq *newspacq;
2193 int error;
2194
2195 /* sanity check */
2196 if (sp == NULL)
2197 panic("key_spdacquire: NULL pointer is passed.\n");
2198 if (sp->req != NULL)
2199 panic("key_spdacquire: called but there is request.\n");
2200 if (sp->policy != IPSEC_POLICY_IPSEC)
2201 panic("key_spdacquire: policy mismatched. IPsec is expected.\n");
2202
2203 /* get a entry to check whether sent message or not. */
2204 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2205 if (key_blockacq_count < newspacq->count) {
2206 /* reset counter and do send message. */
2207 newspacq->count = 0;
2208 } else {
2209 /* increment counter and do nothing. */
2210 newspacq->count++;
2211 return 0;
2212 }
2213 } else {
2214 /* make new entry for blocking to send SADB_ACQUIRE. */
2215 if ((newspacq = key_newspacq(&sp->spidx)) == NULL)
2216 return ENOBUFS;
2217
2218 /* add to acqtree */
2219 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2220 }
2221
2222 /* create new sadb_msg to reply. */
2223 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2224 if (!m) {
2225 error = ENOBUFS;
2226 goto fail;
2227 }
2228 result = m;
2229
2230 result->m_pkthdr.len = 0;
2231 for (m = result; m; m = m->m_next)
2232 result->m_pkthdr.len += m->m_len;
2233
2234 mtod(result, struct sadb_msg *)->sadb_msg_len =
2235 PFKEY_UNIT64(result->m_pkthdr.len);
2236
2237 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2238
2239 fail:
2240 if (result)
2241 m_freem(result);
2242 return error;
2243 }
2244
2245 /*
2246 * SADB_SPDFLUSH processing
2247 * receive
2248 * <base>
2249 * from the user, and free all entries in secpctree.
2250 * and send,
2251 * <base>
2252 * to the user.
2253 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2254 *
2255 * m will always be freed.
2256 */
2257 static int
2258 key_spdflush(struct socket *so, struct mbuf *m,
2259 const struct sadb_msghdr *mhp)
2260 {
2261 struct sadb_msg *newmsg;
2262 struct secpolicy *sp;
2263 u_int dir;
2264
2265 /* sanity check */
2266 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2267 panic("key_spdflush: NULL pointer is passed.\n");
2268
2269 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2270 return key_senderror(so, m, EINVAL);
2271
2272 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2273 LIST_FOREACH(sp, &sptree[dir], chain) {
2274 sp->state = IPSEC_SPSTATE_DEAD;
2275 }
2276 }
2277
2278 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2279 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2280 return key_senderror(so, m, ENOBUFS);
2281 }
2282
2283 if (m->m_next)
2284 m_freem(m->m_next);
2285 m->m_next = NULL;
2286 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2287 newmsg = mtod(m, struct sadb_msg *);
2288 newmsg->sadb_msg_errno = 0;
2289 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2290
2291 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2292 }
2293
2294 /*
2295 * SADB_SPDDUMP processing
2296 * receive
2297 * <base>
2298 * from the user, and dump all SP leaves
2299 * and send,
2300 * <base> .....
2301 * to the ikmpd.
2302 *
2303 * m will always be freed.
2304 */
2305 static int
2306 key_spddump(struct socket *so, struct mbuf *m,
2307 const struct sadb_msghdr *mhp)
2308 {
2309 struct secpolicy *sp;
2310 int cnt;
2311 u_int dir;
2312 struct mbuf *n;
2313
2314 /* sanity check */
2315 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2316 panic("key_spddump: NULL pointer is passed.\n");
2317
2318 /* search SPD entry and get buffer size. */
2319 cnt = 0;
2320 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2321 LIST_FOREACH(sp, &sptree[dir], chain) {
2322 cnt++;
2323 }
2324 }
2325
2326 if (cnt == 0)
2327 return key_senderror(so, m, ENOENT);
2328
2329 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2330 LIST_FOREACH(sp, &sptree[dir], chain) {
2331 --cnt;
2332 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2333 mhp->msg->sadb_msg_pid);
2334
2335 if (n)
2336 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2337 }
2338 }
2339
2340 m_freem(m);
2341 return 0;
2342 }
2343
2344 static struct mbuf *
2345 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2346 u_int32_t pid)
2347 {
2348 struct mbuf *result = NULL, *m;
2349
2350 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2351 if (!m)
2352 goto fail;
2353 result = m;
2354
2355 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2356 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
2357 sp->spidx.ul_proto);
2358 if (!m)
2359 goto fail;
2360 m_cat(result, m);
2361
2362 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2363 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
2364 sp->spidx.ul_proto);
2365 if (!m)
2366 goto fail;
2367 m_cat(result, m);
2368
2369 m = key_sp2msg(sp);
2370 if (!m)
2371 goto fail;
2372 m_cat(result, m);
2373
2374 if ((result->m_flags & M_PKTHDR) == 0)
2375 goto fail;
2376
2377 if (result->m_len < sizeof(struct sadb_msg)) {
2378 result = m_pullup(result, sizeof(struct sadb_msg));
2379 if (result == NULL)
2380 goto fail;
2381 }
2382
2383 result->m_pkthdr.len = 0;
2384 for (m = result; m; m = m->m_next)
2385 result->m_pkthdr.len += m->m_len;
2386
2387 mtod(result, struct sadb_msg *)->sadb_msg_len =
2388 PFKEY_UNIT64(result->m_pkthdr.len);
2389
2390 return result;
2391
2392 fail:
2393 m_freem(result);
2394 return NULL;
2395 }
2396
2397 /*
2398 * get PFKEY message length for security policy and request.
2399 */
2400 static u_int
2401 key_getspreqmsglen(struct secpolicy *sp)
2402 {
2403 u_int tlen;
2404
2405 tlen = sizeof(struct sadb_x_policy);
2406
2407 /* if is the policy for ipsec ? */
2408 if (sp->policy != IPSEC_POLICY_IPSEC)
2409 return tlen;
2410
2411 /* get length of ipsec requests */
2412 {
2413 struct ipsecrequest *isr;
2414 int len;
2415
2416 for (isr = sp->req; isr != NULL; isr = isr->next) {
2417 len = sizeof(struct sadb_x_ipsecrequest)
2418 + isr->saidx.src.ss_len
2419 + isr->saidx.dst.ss_len;
2420
2421 tlen += PFKEY_ALIGN8(len);
2422 }
2423 }
2424
2425 return tlen;
2426 }
2427
2428 /*
2429 * SADB_SPDEXPIRE processing
2430 * send
2431 * <base, address(SD), lifetime(CH), policy>
2432 * to KMD by PF_KEY.
2433 *
2434 * OUT: 0 : succeed
2435 * others : error number
2436 */
2437 static int
2438 key_spdexpire(struct secpolicy *sp)
2439 {
2440 struct mbuf *result = NULL, *m;
2441 int len;
2442 int error = -1;
2443 struct sadb_lifetime *lt;
2444
2445 /* XXX: Why do we lock ? */
2446 crit_enter();
2447
2448 /* sanity check */
2449 if (sp == NULL)
2450 panic("key_spdexpire: NULL pointer is passed.\n");
2451
2452 /* set msg header */
2453 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2454 if (!m) {
2455 error = ENOBUFS;
2456 goto fail;
2457 }
2458 result = m;
2459
2460 /* create lifetime extension (current and hard) */
2461 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2462 m = key_alloc_mbuf(len);
2463 if (!m || m->m_next) { /*XXX*/
2464 if (m)
2465 m_freem(m);
2466 error = ENOBUFS;
2467 goto fail;
2468 }
2469 bzero(mtod(m, caddr_t), len);
2470 lt = mtod(m, struct sadb_lifetime *);
2471 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2472 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2473 lt->sadb_lifetime_allocations = 0;
2474 lt->sadb_lifetime_bytes = 0;
2475 lt->sadb_lifetime_addtime = sp->created;
2476 lt->sadb_lifetime_usetime = sp->lastused;
2477 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2478 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2479 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2480 lt->sadb_lifetime_allocations = 0;
2481 lt->sadb_lifetime_bytes = 0;
2482 lt->sadb_lifetime_addtime = sp->lifetime;
2483 lt->sadb_lifetime_usetime = sp->validtime;
2484 m_cat(result, m);
2485
2486 /* set sadb_address for source */
2487 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2488 (struct sockaddr *)&sp->spidx.src,
2489 sp->spidx.prefs, sp->spidx.ul_proto);
2490 if (!m) {
2491 error = ENOBUFS;
2492 goto fail;
2493 }
2494 m_cat(result, m);
2495
2496 /* set sadb_address for destination */
2497 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2498 (struct sockaddr *)&sp->spidx.dst,
2499 sp->spidx.prefd, sp->spidx.ul_proto);
2500 if (!m) {
2501 error = ENOBUFS;
2502 goto fail;
2503 }
2504 m_cat(result, m);
2505
2506 /* set secpolicy */
2507 m = key_sp2msg(sp);
2508 if (!m) {
2509 error = ENOBUFS;
2510 goto fail;
2511 }
2512 m_cat(result, m);
2513
2514 if ((result->m_flags & M_PKTHDR) == 0) {
2515 error = EINVAL;
2516 goto fail;
2517 }
2518
2519 if (result->m_len < sizeof(struct sadb_msg)) {
2520 result = m_pullup(result, sizeof(struct sadb_msg));
2521 if (result == NULL) {
2522 error = ENOBUFS;
2523 goto fail;
2524 }
2525 }
2526
2527 result->m_pkthdr.len = 0;
2528 for (m = result; m; m = m->m_next)
2529 result->m_pkthdr.len += m->m_len;
2530
2531 mtod(result, struct sadb_msg *)->sadb_msg_len =
2532 PFKEY_UNIT64(result->m_pkthdr.len);
2533
2534 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2535
2536 fail:
2537 if (result)
2538 m_freem(result);
2539 crit_exit();
2540 return error;
2541 }
2542
2543 /* %%% SAD management */
2544 /*
2545 * allocating a memory for new SA head, and copy from the values of mhp.
2546 * OUT: NULL : failure due to the lack of memory.
2547 * others : pointer to new SA head.
2548 */
2549 static struct secashead *
2550 key_newsah(struct secasindex *saidx)
2551 {
2552 struct secashead *newsah;
2553
2554 /* sanity check */
2555 if (saidx == NULL)
2556 panic("key_newsaidx: NULL pointer is passed.\n");
2557
2558 newsah = keydb_newsecashead();
2559 if (newsah == NULL)
2560 return NULL;
2561
2562 bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
2563
2564 /* add to saidxtree */
2565 newsah->state = SADB_SASTATE_MATURE;
2566 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2567
2568 return(newsah);
2569 }
2570
2571 /*
2572 * delete SA index and all SA registerd.
2573 */
2574 static void
2575 key_delsah(struct secashead *sah)
2576 {
2577 struct secasvar *sav, *nextsav;
2578 u_int stateidx, state;
2579 int zombie = 0;
2580
2581 /* sanity check */
2582 if (sah == NULL)
2583 panic("key_delsah: NULL pointer is passed.\n");
2584
2585 crit_enter();
2586
2587 /* searching all SA registerd in the secindex. */
2588 for (stateidx = 0;
2589 stateidx < _ARRAYLEN(saorder_state_any);
2590 stateidx++) {
2591
2592 state = saorder_state_any[stateidx];
2593 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2594 sav != NULL;
2595 sav = nextsav) {
2596
2597 nextsav = LIST_NEXT(sav, chain);
2598
2599 if (sav->refcnt > 0) {
2600 /* give up to delete this sa */
2601 zombie++;
2602 continue;
2603 }
2604
2605 /* sanity check */
2606 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2607
2608 key_freesav(sav);
2609
2610 /* remove back pointer */
2611 sav->sah = NULL;
2612 sav = NULL;
2613 }
2614 }
2615
2616 /* don't delete sah only if there are savs. */
2617 if (zombie) {
2618 crit_exit();
2619 return;
2620 }
2621
2622 if (sah->sa_route.ro_rt) {
2623 RTFREE(sah->sa_route.ro_rt);
2624 sah->sa_route.ro_rt = (struct rtentry *)NULL;
2625 }
2626
2627 /* remove from tree of SA index */
2628 if (__LIST_CHAINED(sah))
2629 LIST_REMOVE(sah, chain);
2630
2631 KFREE(sah);
2632
2633 crit_exit();
2634 return;
2635 }
2636
2637 /*
2638 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2639 * and copy the values of mhp into new buffer.
2640 * When SAD message type is GETSPI:
2641 * to set sequence number from acq_seq++,
2642 * to set zero to SPI.
2643 * not to call key_setsava().
2644 * OUT: NULL : fail
2645 * others : pointer to new secasvar.
2646 *
2647 * does not modify mbuf. does not free mbuf on error.
2648 */
2649 static struct secasvar *
2650 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
2651 struct secashead *sah, int *errp)
2652 {
2653 struct secasvar *newsav;
2654 const struct sadb_sa *xsa;
2655
2656 /* sanity check */
2657 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2658 panic("key_newsa: NULL pointer is passed.\n");
2659
2660 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2661 if (newsav == NULL) {
2662 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2663 *errp = ENOBUFS;
2664 return NULL;
2665 }
2666 bzero((caddr_t)newsav, sizeof(struct secasvar));
2667
2668 switch (mhp->msg->sadb_msg_type) {
2669 case SADB_GETSPI:
2670 newsav->spi = 0;
2671
2672 #ifdef IPSEC_DOSEQCHECK
2673 /* sync sequence number */
2674 if (mhp->msg->sadb_msg_seq == 0)
2675 newsav->seq =
2676 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2677 else
2678 #endif
2679 newsav->seq = mhp->msg->sadb_msg_seq;
2680 break;
2681
2682 case SADB_ADD:
2683 /* sanity check */
2684 if (mhp->ext[SADB_EXT_SA] == NULL) {
2685 KFREE(newsav);
2686 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2687 *errp = EINVAL;
2688 return NULL;
2689 }
2690 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2691 newsav->spi = xsa->sadb_sa_spi;
2692 newsav->seq = mhp->msg->sadb_msg_seq;
2693 break;
2694 default:
2695 KFREE(newsav);
2696 *errp = EINVAL;
2697 return NULL;
2698 }
2699
2700 /* copy sav values */
2701 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2702 *errp = key_setsaval(newsav, m, mhp);
2703 if (*errp) {
2704 KFREE(newsav);
2705 return NULL;
2706 }
2707 }
2708
2709 /* reset created */
2710 {
2711 struct timeval tv;
2712 microtime(&tv);
2713 newsav->created = tv.tv_sec;
2714 }
2715
2716 newsav->pid = mhp->msg->sadb_msg_pid;
2717
2718 /* add to satree */
2719 newsav->sah = sah;
2720 newsav->refcnt = 1;
2721 newsav->state = SADB_SASTATE_LARVAL;
2722 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2723 secasvar, chain);
2724
2725 return newsav;
2726 }
2727
2728 /*
2729 * free() SA variable entry.
2730 */
2731 static void
2732 key_delsav(struct secasvar *sav)
2733 {
2734 /* sanity check */
2735 if (sav == NULL)
2736 panic("key_delsav: NULL pointer is passed.\n");
2737
2738 if (sav->refcnt > 0)
2739 return; /* can't free */
2740
2741 /* remove from SA header */
2742 if (__LIST_CHAINED(sav))
2743 LIST_REMOVE(sav, chain);
2744
2745 if (sav->key_auth != NULL) {
2746 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2747 KFREE(sav->key_auth);
2748 sav->key_auth = NULL;
2749 }
2750 if (sav->key_enc != NULL) {
2751 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2752 KFREE(sav->key_enc);
2753 sav->key_enc = NULL;
2754 }
2755 if (sav->sched) {
2756 bzero(sav->sched, sav->schedlen);
2757 KFREE(sav->sched);
2758 sav->sched = NULL;
2759 }
2760 if (sav->replay != NULL) {
2761 keydb_delsecreplay(sav->replay);
2762 sav->replay = NULL;
2763 }
2764 if (sav->lft_c != NULL) {
2765 KFREE(sav->lft_c);
2766 sav->lft_c = NULL;
2767 }
2768 if (sav->lft_h != NULL) {
2769 KFREE(sav->lft_h);
2770 sav->lft_h = NULL;
2771 }
2772 if (sav->lft_s != NULL) {
2773 KFREE(sav->lft_s);
2774 sav->lft_s = NULL;
2775 }
2776 if (sav->iv != NULL) {
2777 KFREE(sav->iv);
2778 sav->iv = NULL;
2779 }
2780
2781 KFREE(sav);
2782
2783 return;
2784 }
2785
2786 /*
2787 * search SAD.
2788 * OUT:
2789 * NULL : not found
2790 * others : found, pointer to a SA.
2791 */
2792 static struct secashead *
2793 key_getsah(struct secasindex *saidx)
2794 {
2795 struct secashead *sah;
2796
2797 LIST_FOREACH(sah, &sahtree, chain) {
2798 if (sah->state == SADB_SASTATE_DEAD)
2799 continue;
2800 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2801 return sah;
2802 }
2803
2804 return NULL;
2805 }
2806
2807 /*
2808 * check not to be duplicated SPI.
2809 * NOTE: this function is too slow due to searching all SAD.
2810 * OUT:
2811 * NULL : not found
2812 * others : found, pointer to a SA.
2813 */
2814 static struct secasvar *
2815 key_checkspidup(struct secasindex *saidx, u_int32_t spi)
2816 {
2817 struct secashead *sah;
2818 struct secasvar *sav;
2819
2820 /* check address family */
2821 if (saidx->src.ss_family != saidx->dst.ss_family) {
2822 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2823 return NULL;
2824 }
2825
2826 /* check all SAD */
2827 LIST_FOREACH(sah, &sahtree, chain) {
2828 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2829 continue;
2830 sav = key_getsavbyspi(sah, spi);
2831 if (sav != NULL)
2832 return sav;
2833 }
2834
2835 return NULL;
2836 }
2837
2838 /*
2839 * search SAD litmited alive SA, protocol, SPI.
2840 * OUT:
2841 * NULL : not found
2842 * others : found, pointer to a SA.
2843 */
2844 static struct secasvar *
2845 key_getsavbyspi(struct secashead *sah, u_int32_t spi)
2846 {
2847 struct secasvar *sav;
2848 u_int stateidx, state;
2849
2850 /* search all status */
2851 for (stateidx = 0;
2852 stateidx < _ARRAYLEN(saorder_state_alive);
2853 stateidx++) {
2854
2855 state = saorder_state_alive[stateidx];
2856 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2857
2858 /* sanity check */
2859 if (sav->state != state) {
2860 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2861 "invalid sav->state (queue: %d SA: %d)\n",
2862 state, sav->state));
2863 continue;
2864 }
2865
2866 if (sav->spi == spi)
2867 return sav;
2868 }
2869 }
2870
2871 return NULL;
2872 }
2873
2874 /*
2875 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2876 * You must update these if need.
2877 * OUT: 0: success.
2878 * !0: failure.
2879 *
2880 * does not modify mbuf. does not free mbuf on error.
2881 */
2882 static int
2883 key_setsaval(struct secasvar *sav, struct mbuf *m,
2884 const struct sadb_msghdr *mhp)
2885 {
2886 #ifdef IPSEC_ESP
2887 const struct esp_algorithm *algo;
2888 #endif
2889 int error = 0;
2890 struct timeval tv;
2891
2892 /* sanity check */
2893 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2894 panic("key_setsaval: NULL pointer is passed.\n");
2895
2896 /* initialization */
2897 sav->replay = NULL;
2898 sav->key_auth = NULL;
2899 sav->key_enc = NULL;
2900 sav->sched = NULL;
2901 sav->schedlen = 0;
2902 sav->iv = NULL;
2903 sav->lft_c = NULL;
2904 sav->lft_h = NULL;
2905 sav->lft_s = NULL;
2906
2907 /* SA */
2908 if (mhp->ext[SADB_EXT_SA] != NULL) {
2909 const struct sadb_sa *sa0;
2910
2911 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2912 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
2913 error = EINVAL;
2914 goto fail;
2915 }
2916
2917 sav->alg_auth = sa0->sadb_sa_auth;
2918 sav->alg_enc = sa0->sadb_sa_encrypt;
2919 sav->flags = sa0->sadb_sa_flags;
2920
2921 /* replay window */
2922 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
2923 sav->replay = keydb_newsecreplay(sa0->sadb_sa_replay);
2924 if (sav->replay == NULL) {
2925 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2926 error = ENOBUFS;
2927 goto fail;
2928 }
2929 }
2930 }
2931
2932 /* Authentication keys */
2933 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2934 const struct sadb_key *key0;
2935 int len;
2936
2937 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2938 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2939
2940 error = 0;
2941 if (len < sizeof(*key0)) {
2942 error = EINVAL;
2943 goto fail;
2944 }
2945 switch (mhp->msg->sadb_msg_satype) {
2946 case SADB_SATYPE_AH:
2947 case SADB_SATYPE_ESP:
2948 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2949 sav->alg_auth != SADB_X_AALG_NULL)
2950 error = EINVAL;
2951 break;
2952 case SADB_X_SATYPE_IPCOMP:
2953 default:
2954 error = EINVAL;
2955 break;
2956 }
2957 if (error) {
2958 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2959 goto fail;
2960 }
2961
2962 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2963 if (sav->key_auth == NULL) {
2964 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2965 error = ENOBUFS;
2966 goto fail;
2967 }
2968 }
2969
2970 /* Encryption key */
2971 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2972 const struct sadb_key *key0;
2973 int len;
2974
2975 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2976 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2977
2978 error = 0;
2979 if (len < sizeof(*key0)) {
2980 error = EINVAL;
2981 goto fail;
2982 }
2983 switch (mhp->msg->sadb_msg_satype) {
2984 case SADB_SATYPE_ESP:
2985 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2986 sav->alg_enc != SADB_EALG_NULL) {
2987 error = EINVAL;
2988 break;
2989 }
2990 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
2991 if (sav->key_enc == NULL) {
2992 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2993 error = ENOBUFS;
2994 goto fail;
2995 }
2996 break;
2997 case SADB_X_SATYPE_IPCOMP:
2998 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
2999 error = EINVAL;
3000 sav->key_enc = NULL; /*just in case*/
3001 break;
3002 case SADB_SATYPE_AH:
3003 default:
3004 error = EINVAL;
3005 break;
3006 }
3007 if (error) {
3008 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3009 goto fail;
3010 }
3011 }
3012
3013 /* set iv */
3014 sav->ivlen = 0;
3015
3016 switch (mhp->msg->sadb_msg_satype) {
3017 case SADB_SATYPE_ESP:
3018 #ifdef IPSEC_ESP
3019 algo = esp_algorithm_lookup(sav->alg_enc);
3020 if (algo && algo->ivlen)
3021 sav->ivlen = (*algo->ivlen)(algo, sav);
3022 if (sav->ivlen == 0)
3023 break;
3024 KMALLOC(sav->iv, caddr_t, sav->ivlen);
3025 if (sav->iv == 0) {
3026 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3027 error = ENOBUFS;
3028 goto fail;
3029 }
3030
3031 /* initialize */
3032 key_randomfill(sav->iv, sav->ivlen);
3033 #endif
3034 break;
3035 case SADB_SATYPE_AH:
3036 case SADB_X_SATYPE_IPCOMP:
3037 break;
3038 default:
3039 ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n"));
3040 error = EINVAL;
3041 goto fail;
3042 }
3043
3044 /* reset created */
3045 microtime(&tv);
3046 sav->created = tv.tv_sec;
3047
3048 /* make lifetime for CURRENT */
3049 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3050 sizeof(struct sadb_lifetime));
3051 if (sav->lft_c == NULL) {
3052 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3053 error = ENOBUFS;
3054 goto fail;
3055 }
3056
3057 microtime(&tv);
3058
3059 sav->lft_c->sadb_lifetime_len =
3060 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3061 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3062 sav->lft_c->sadb_lifetime_allocations = 0;
3063 sav->lft_c->sadb_lifetime_bytes = 0;
3064 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
3065 sav->lft_c->sadb_lifetime_usetime = 0;
3066
3067 /* lifetimes for HARD and SOFT */
3068 {
3069 const struct sadb_lifetime *lft0;
3070
3071 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3072 if (lft0 != NULL) {
3073 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3074 error = EINVAL;
3075 goto fail;
3076 }
3077 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3078 sizeof(*lft0));
3079 if (sav->lft_h == NULL) {
3080 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3081 error = ENOBUFS;
3082 goto fail;
3083 }
3084 /* to be initialize ? */
3085 }
3086
3087 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3088 if (lft0 != NULL) {
3089 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3090 error = EINVAL;
3091 goto fail;
3092 }
3093 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3094 sizeof(*lft0));
3095 if (sav->lft_s == NULL) {
3096 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3097 error = ENOBUFS;
3098 goto fail;
3099 }
3100 /* to be initialize ? */
3101 }
3102 }
3103
3104 return 0;
3105
3106 fail:
3107 /* initialization */
3108 if (sav->replay != NULL) {
3109 keydb_delsecreplay(sav->replay);
3110 sav->replay = NULL;
3111 }
3112 if (sav->key_auth != NULL) {
3113 KFREE(sav->key_auth);
3114 sav->key_auth = NULL;
3115 }
3116 if (sav->key_enc != NULL) {
3117 KFREE(sav->key_enc);
3118 sav->key_enc = NULL;
3119 }
3120 if (sav->sched) {
3121 KFREE(sav->sched);
3122 sav->sched = NULL;
3123 }
3124 if (sav->iv != NULL) {
3125 KFREE(sav->iv);
3126 sav->iv = NULL;
3127 }
3128 if (sav->lft_c != NULL) {
3129 KFREE(sav->lft_c);
3130 sav->lft_c = NULL;
3131 }
3132 if (sav->lft_h != NULL) {
3133 KFREE(sav->lft_h);
3134 sav->lft_h = NULL;
3135 }
3136 if (sav->lft_s != NULL) {
3137 KFREE(sav->lft_s);
3138 sav->lft_s = NULL;
3139 }
3140
3141 return error;
3142 }
3143
3144 /*
3145 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3146 * OUT: 0: valid
3147 * other: errno
3148 */
3149 static int
3150 key_mature(struct secasvar *sav)
3151 {
3152 int mature;
3153 int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3154 int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3155
3156 mature = 0;
3157
3158 /* check SPI value */
3159 switch (sav->sah->saidx.proto) {
3160 case IPPROTO_ESP:
3161 case IPPROTO_AH:
3162 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3163 ipseclog((LOG_DEBUG,
3164 "key_mature: illegal range of SPI %u.\n",
3165 (u_int32_t)ntohl(sav->spi)));
3166 return EINVAL;
3167 }
3168 break;
3169 }
3170
3171 /* check satype */
3172 switch (sav->sah->saidx.proto) {
3173 case IPPROTO_ESP:
3174 /* check flags */
3175 if ((sav->flags & SADB_X_EXT_OLD)
3176 && (sav->flags & SADB_X_EXT_DERIV)) {
3177 ipseclog((LOG_DEBUG, "key_mature: "
3178 "invalid flag (derived) given to old-esp.\n"));
3179 return EINVAL;
3180 }
3181 if (sav->alg_auth == SADB_AALG_NONE)
3182 checkmask = 1;
3183 else
3184 checkmask = 3;
3185 mustmask = 1;
3186 break;
3187 case IPPROTO_AH:
3188 /* check flags */
3189 if (sav->flags & SADB_X_EXT_DERIV) {
3190 ipseclog((LOG_DEBUG, "key_mature: "
3191 "invalid flag (derived) given to AH SA.\n"));
3192 return EINVAL;
3193 }
3194 if (sav->alg_enc != SADB_EALG_NONE) {
3195 ipseclog((LOG_DEBUG, "key_mature: "
3196 "protocol and algorithm mismated.\n"));
3197 return(EINVAL);
3198 }
3199 checkmask = 2;
3200 mustmask = 2;
3201 break;
3202 case IPPROTO_IPCOMP:
3203 if (sav->alg_auth != SADB_AALG_NONE) {
3204 ipseclog((LOG_DEBUG, "key_mature: "
3205 "protocol and algorithm mismated.\n"));
3206 return(EINVAL);
3207 }
3208 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3209 && ntohl(sav->spi) >= 0x10000) {
3210 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3211 return(EINVAL);
3212 }
3213 checkmask = 4;
3214 mustmask = 4;
3215 break;
3216 default:
3217 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3218 return EPROTONOSUPPORT;
3219 }
3220
3221 /* check authentication algorithm */
3222 if ((checkmask & 2) != 0) {
3223 const struct ah_algorithm *algo;
3224 int keylen;
3225
3226 algo = ah_algorithm_lookup(sav->alg_auth);
3227 if (!algo) {
3228 ipseclog((LOG_DEBUG,"key_mature: "
3229 "unknown authentication algorithm.\n"));
3230 return EINVAL;
3231 }
3232
3233 /* algorithm-dependent check */
3234 if (sav->key_auth)
3235 keylen = sav->key_auth->sadb_key_bits;
3236 else
3237 keylen = 0;
3238 if (keylen < algo->keymin || algo->keymax < keylen) {
3239 ipseclog((LOG_DEBUG,
3240 "key_mature: invalid AH key length %d "
3241 "(%d-%d allowed)\n",
3242 keylen, algo->keymin, algo->keymax));
3243 return EINVAL;
3244 }
3245
3246 if (algo->mature) {
3247 if ((*algo->mature)(sav)) {
3248 /* message generated in per-algorithm function*/
3249 return EINVAL;
3250 } else
3251 mature = SADB_SATYPE_AH;
3252 }
3253
3254 if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) {
3255 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n"));
3256 return EINVAL;
3257 }
3258 }
3259
3260 /* check encryption algorithm */
3261 if ((checkmask & 1) != 0) {
3262 #ifdef IPSEC_ESP
3263 const struct esp_algorithm *algo;
3264 int keylen;
3265
3266 algo = esp_algorithm_lookup(sav->alg_enc);
3267 if (!algo) {
3268 ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n"));
3269 return EINVAL;
3270 }
3271
3272 /* algorithm-dependent check */
3273 if (sav->key_enc)
3274 keylen = sav->key_enc->sadb_key_bits;
3275 else
3276 keylen = 0;
3277 if (keylen < algo->keymin || algo->keymax < keylen) {
3278 ipseclog((LOG_DEBUG,
3279 "key_mature: invalid ESP key length %d "
3280 "(%d-%d allowed)\n",
3281 keylen, algo->keymin, algo->keymax));
3282 return EINVAL;
3283 }
3284
3285 if (algo->mature) {
3286 if ((*algo->mature)(sav)) {
3287 /* message generated in per-algorithm function*/
3288 return EINVAL;
3289 } else
3290 mature = SADB_SATYPE_ESP;
3291 }
3292
3293 if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) {
3294 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n"));
3295 return EINVAL;
3296 }
3297 #else /*IPSEC_ESP*/
3298 ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n"));
3299 return EINVAL;
3300 #endif
3301 }
3302
3303 /* check compression algorithm */
3304 if ((checkmask & 4) != 0) {
3305 const struct ipcomp_algorithm *algo;
3306
3307 /* algorithm-dependent check */
3308 algo = ipcomp_algorithm_lookup(sav->alg_enc);
3309 if (!algo) {
3310 ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n"));
3311 return EINVAL;
3312 }
3313 }
3314
3315 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3316
3317 return 0;
3318 }
3319
3320 /*
3321 * subroutine for SADB_GET and SADB_DUMP.
3322 */
3323 static struct mbuf *
3324 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3325 u_int32_t seq, u_int32_t pid)
3326 {
3327 struct mbuf *result = NULL, *tres = NULL, *m;
3328 int l = 0;
3329 int i;
3330 void *p;
3331 int dumporder[] = {
3332 SADB_EXT_SA, SADB_X_EXT_SA2,
3333 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3334 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3335 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3336 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3337 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3338 };
3339
3340 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3341 if (m == NULL)
3342 goto fail;
3343 result = m;
3344
3345 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3346 m = NULL;
3347 p = NULL;
3348 switch (dumporder[i]) {
3349 case SADB_EXT_SA:
3350 m = key_setsadbsa(sav);
3351 if (!m)
3352 goto fail;
3353 break;
3354
3355 case SADB_X_EXT_SA2:
3356 m = key_setsadbxsa2(sav->sah->saidx.mode,
3357 sav->replay ? sav->replay->count : 0,
3358 sav->sah->saidx.reqid);
3359 if (!m)
3360 goto fail;
3361 break;
3362
3363 case SADB_EXT_ADDRESS_SRC:
3364 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3365 (struct sockaddr *)&sav->sah->saidx.src,
3366 FULLMASK, IPSEC_ULPROTO_ANY);
3367 if (!m)
3368 goto fail;
3369 break;
3370
3371 case SADB_EXT_ADDRESS_DST:
3372 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3373 (struct sockaddr *)&sav->sah->saidx.dst,
3374 FULLMASK, IPSEC_ULPROTO_ANY);
3375 if (!m)
3376 goto fail;
3377 break;
3378
3379 case SADB_EXT_KEY_AUTH:
3380 if (!sav->key_auth)
3381 continue;
3382 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3383 p = sav->key_auth;
3384 break;
3385
3386 case SADB_EXT_KEY_ENCRYPT:
3387 if (!sav->key_enc)
3388 continue;
3389 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3390 p = sav->key_enc;
3391 break;
3392
3393 case SADB_EXT_LIFETIME_CURRENT:
3394 if (!sav->lft_c)
3395 continue;
3396 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3397 p = sav->lft_c;
3398 break;
3399
3400 case SADB_EXT_LIFETIME_HARD:
3401 if (!sav->lft_h)
3402 continue;
3403 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3404 p = sav->lft_h;
3405 break;
3406
3407 case SADB_EXT_LIFETIME_SOFT:
3408 if (!sav->lft_s)
3409 continue;
3410 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3411 p = sav->lft_s;
3412 break;
3413
3414 case SADB_EXT_ADDRESS_PROXY:
3415 case SADB_EXT_IDENTITY_SRC:
3416 case SADB_EXT_IDENTITY_DST:
3417 /* XXX: should we brought from SPD ? */
3418 case SADB_EXT_SENSITIVITY:
3419 default:
3420 continue;
3421 }
3422
3423 if ((!m && !p) || (m && p))
3424 goto fail;
3425 if (p && tres) {
3426 M_PREPEND(tres, l, MB_DONTWAIT);
3427 if (!tres)
3428 goto fail;
3429 bcopy(p, mtod(tres, caddr_t), l);
3430 continue;
3431 }
3432 if (p) {
3433 m = key_alloc_mbuf(l);
3434 if (!m)
3435 goto fail;
3436 m_copyback(m, 0, l, p);
3437 }
3438
3439 if (tres)
3440 m_cat(m, tres);
3441 tres = m;
3442 }
3443
3444 m_cat(result, tres);
3445
3446 if (result->m_len < sizeof(struct sadb_msg)) {
3447 result = m_pullup(result, sizeof(struct sadb_msg));
3448 if (result == NULL)
3449 goto fail;
3450 }
3451
3452 result->m_pkthdr.len = 0;
3453 for (m = result; m; m = m->m_next)
3454 result->m_pkthdr.len += m->m_len;
3455
3456 mtod(result, struct sadb_msg *)->sadb_msg_len =
3457 PFKEY_UNIT64(result->m_pkthdr.len);
3458
3459 return result;
3460
3461 fail:
3462 m_freem(result);
3463 m_freem(tres);
3464 return NULL;
3465 }
3466
3467 /*
3468 * set data into sadb_msg.
3469 */
3470 static struct mbuf *
3471 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype,
3472 u_int32_t seq, pid_t pid, u_int16_t reserved)
3473 {
3474 struct mbuf *m;
3475 struct sadb_msg *p;
3476 int len;
3477
3478 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3479 if (len > MCLBYTES)
3480 return NULL;
3481 MGETHDR(m, MB_DONTWAIT, MT_DATA);
3482 if (m && len > MHLEN) {
3483 MCLGET(m, MB_DONTWAIT);
3484 if ((m->m_flags & M_EXT) == 0) {
3485 m_freem(m);
3486 m = NULL;
3487 }
3488 }
3489 if (!m)
3490 return NULL;
3491 m->m_pkthdr.len = m->m_len = len;
3492 m->m_next = NULL;
3493
3494 p = mtod(m, struct sadb_msg *);
3495
3496 bzero(p, len);
3497 p->sadb_msg_version = PF_KEY_V2;
3498 p->sadb_msg_type = type;
3499 p->sadb_msg_errno = 0;
3500 p->sadb_msg_satype = satype;
3501 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3502 p->sadb_msg_reserved = reserved;
3503 p->sadb_msg_seq = seq;
3504 p->sadb_msg_pid = (u_int32_t)pid;
3505
3506 return m;
3507 }
3508
3509 /*
3510 * copy secasvar data into sadb_address.
3511 */
3512 static struct mbuf *
3513 key_setsadbsa(struct secasvar *sav)
3514 {
3515 struct mbuf *m;
3516 struct sadb_sa *p;
3517 int len;
3518
3519 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3520 m = key_alloc_mbuf(len);
3521 if (!m || m->m_next) { /*XXX*/
3522 if (m)
3523 m_freem(m);
3524 return NULL;
3525 }
3526
3527 p = mtod(m, struct sadb_sa *);
3528
3529 bzero(p, len);
3530 p->sadb_sa_len = PFKEY_UNIT64(len);
3531 p->sadb_sa_exttype = SADB_EXT_SA;
3532 p->sadb_sa_spi = sav->spi;
3533 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3534 p->sadb_sa_state = sav->state;
3535 p->sadb_sa_auth = sav->alg_auth;
3536 p->sadb_sa_encrypt = sav->alg_enc;
3537 p->sadb_sa_flags = sav->flags;
3538
3539 return m;
3540 }
3541
3542 /*
3543 * set data into sadb_address.
3544 */
3545 static struct mbuf *
3546 key_setsadbaddr(u_int16_t exttype, struct sockaddr *saddr,
3547 u_int8_t prefixlen, u_int16_t ul_proto)
3548 {
3549 struct mbuf *m;
3550 struct sadb_address *p;
3551 size_t len;
3552
3553 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3554 PFKEY_ALIGN8(saddr->sa_len);
3555 m = key_alloc_mbuf(len);
3556 if (!m || m->m_next) { /*XXX*/
3557 if (m)
3558 m_freem(m);
3559 return NULL;
3560 }
3561
3562 p = mtod(m, struct sadb_address *);
3563
3564 bzero(p, len);
3565 p->sadb_address_len = PFKEY_UNIT64(len);
3566 p->sadb_address_exttype = exttype;
3567 p->sadb_address_proto = ul_proto;
3568 if (prefixlen == FULLMASK) {
3569 switch (saddr->sa_family) {
3570 case AF_INET:
3571 prefixlen = sizeof(struct in_addr) << 3;
3572 break;
3573 case AF_INET6:
3574 prefixlen = sizeof(struct in6_addr) << 3;
3575 break;
3576 default:
3577 ; /*XXX*/
3578 }
3579 }
3580 p->sadb_address_prefixlen = prefixlen;
3581 p->sadb_address_reserved = 0;
3582
3583 bcopy(saddr,
3584 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3585 saddr->sa_len);
3586
3587 return m;
3588 }
3589
3590 #if 0
3591 /*
3592 * set data into sadb_ident.
3593 */
3594 static struct mbuf *
3595 key_setsadbident(u_int16_t exttype, u_int16_t idtype, caddr_t string,
3596 int stringlen, u_int64_t id)
3597 {
3598 struct mbuf *m;
3599 struct sadb_ident *p;
3600 size_t len;
3601
3602 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3603 m = key_alloc_mbuf(len);
3604 if (!m || m->m_next) { /*XXX*/
3605 if (m)
3606 m_freem(m);
3607 return NULL;
3608 }
3609
3610 p = mtod(m, struct sadb_ident *);
3611
3612 bzero(p, len);
3613 p->sadb_ident_len = PFKEY_UNIT64(len);
3614 p->sadb_ident_exttype = exttype;
3615 p->sadb_ident_type = idtype;
3616 p->sadb_ident_reserved = 0;
3617 p->sadb_ident_id = id;
3618
3619 bcopy(string,
3620 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3621 stringlen);
3622
3623 return m;
3624 }
3625 #endif
3626
3627 /*
3628 * set data into sadb_x_sa2.
3629 */
3630 static struct mbuf *
3631 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
3632 {
3633 struct mbuf *m;
3634 struct sadb_x_sa2 *p;
3635 size_t len;
3636
3637 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3638 m = key_alloc_mbuf(len);
3639 if (!m || m->m_next) { /*XXX*/
3640 if (m)
3641 m_freem(m);
3642 return NULL;
3643 }
3644
3645 p = mtod(m, struct sadb_x_sa2 *);
3646
3647 bzero(p, len);
3648 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3649 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3650 p->sadb_x_sa2_mode = mode;
3651 p->sadb_x_sa2_reserved1 = 0;
3652 p->sadb_x_sa2_reserved2 = 0;
3653 p->sadb_x_sa2_sequence = seq;
3654 p->sadb_x_sa2_reqid = reqid;
3655
3656 return m;
3657 }
3658
3659 /*
3660 * set data into sadb_x_policy
3661 */
3662 static struct mbuf *
3663 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
3664 {
3665 struct mbuf *m;
3666 struct sadb_x_policy *p;
3667 size_t len;
3668
3669 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3670 m = key_alloc_mbuf(len);
3671 if (!m || m->m_next) { /*XXX*/
3672 if (m)
3673 m_freem(m);
3674 return NULL;
3675 }
3676
3677 p = mtod(m, struct sadb_x_policy *);
3678
3679 bzero(p, len);
3680 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3681 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3682 p->sadb_x_policy_type = type;
3683 p->sadb_x_policy_dir = dir;
3684 p->sadb_x_policy_id = id;
3685
3686 return m;
3687 }
3688
3689 /* %%% utilities */
3690 /*
3691 * copy a buffer into the new buffer allocated.
3692 */
3693 static void *
3694 key_newbuf(const void *src, u_int len)
3695 {
3696 caddr_t new;
3697
3698 KMALLOC(new, caddr_t, len);
3699 if (new == NULL) {
3700 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3701 return NULL;
3702 }
3703 bcopy(src, new, len);
3704
3705 return new;
3706 }
3707
3708 /* compare my own address
3709 * OUT: 1: true, i.e. my address.
3710 * 0: false
3711 */
3712 int
3713 key_ismyaddr(struct sockaddr *sa)
3714 {
3715 #ifdef INET
3716 struct sockaddr_in *sin;
3717 struct in_ifaddr *ia;
3718 #endif
3719
3720 /* sanity check */
3721 if (sa == NULL)
3722 panic("key_ismyaddr: NULL pointer is passed.\n");
3723
3724 switch (sa->sa_family) {
3725 #ifdef INET
3726 case AF_INET:
3727 sin = (struct sockaddr_in *)sa;
3728 TAILQ_FOREACH(ia, &in_ifaddrhead, ia_link) {
3729 if (sin->sin_family == ia->ia_addr.sin_family &&
3730 sin->sin_len == ia->ia_addr.sin_len &&
3731 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3732 {
3733 return 1;
3734 }
3735 }
3736 break;
3737 #endif
3738 #ifdef INET6
3739 case AF_INET6:
3740 return key_ismyaddr6((struct sockaddr_in6 *)sa);
3741 #endif
3742 }
3743
3744 return 0;
3745 }
3746
3747 #ifdef INET6
3748 /*
3749 * compare my own address for IPv6.
3750 * 1: ours
3751 * 0: other
3752 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3753 */
3754 #include <netinet6/in6_var.h>
3755
3756 static int
3757 key_ismyaddr6(struct sockaddr_in6 *sin6)
3758 {
3759 struct in6_ifaddr *ia;
3760 struct in6_multi *in6m;
3761
3762 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3763 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3764 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3765 return 1;
3766
3767 /*
3768 * XXX Multicast
3769 * XXX why do we care about multlicast here while we don't care
3770 * about IPv4 multicast??
3771 * XXX scope
3772 */
3773 in6m = NULL;
3774 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3775 if (in6m)
3776 return 1;
3777 }
3778
3779 /* loopback, just for safety */
3780 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3781 return 1;
3782
3783 return 0;
3784 }
3785 #endif /*INET6*/
3786
3787 /*
3788 * compare two secasindex structure.
3789 * flag can specify to compare 2 saidxes.
3790 * compare two secasindex structure without both mode and reqid.
3791 * don't compare port.
3792 * IN:
3793 * saidx0: source, it can be in SAD.
3794 * saidx1: object.
3795 * OUT:
3796 * 1 : equal
3797 * 0 : not equal
3798 */
3799 static int
3800 key_cmpsaidx(struct secasindex *saidx0, struct secasindex *saidx1,
3801 int flag)
3802 {
3803 /* sanity */
3804 if (saidx0 == NULL && saidx1 == NULL)
3805 return 1;
3806
3807 if (saidx0 == NULL || saidx1 == NULL)
3808 return 0;
3809
3810 if (saidx0->proto != saidx1->proto)
3811 return 0;
3812
3813 if (flag == CMP_EXACTLY) {
3814 if (saidx0->mode != saidx1->mode)
3815 return 0;
3816 if (saidx0->reqid != saidx1->reqid)
3817 return 0;
3818 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 ||
3819 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0)
3820 return 0;
3821 } else {
3822
3823 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3824 if (flag == CMP_MODE_REQID
3825 ||flag == CMP_REQID) {
3826 /*
3827 * If reqid of SPD is non-zero, unique SA is required.
3828 * The result must be of same reqid in this case.
3829 */
3830 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3831 return 0;
3832 }
3833
3834 if (flag == CMP_MODE_REQID) {
3835 if (saidx0->mode != IPSEC_MODE_ANY
3836 && saidx0->mode != saidx1->mode)
3837 return 0;
3838 }
3839
3840 if (key_sockaddrcmp((struct sockaddr *)&saidx0->src,
3841 (struct sockaddr *)&saidx1->src, 0) != 0) {
3842 return 0;
3843 }
3844 if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst,
3845 (struct sockaddr *)&saidx1->dst, 0) != 0) {
3846 return 0;
3847 }
3848 }
3849
3850 return 1;
3851 }
3852
3853 /*
3854 * compare two secindex structure exactly.
3855 * IN:
3856 * spidx0: source, it is often in SPD.
3857 * spidx1: object, it is often from PFKEY message.
3858 * OUT:
3859 * 1 : equal
3860 * 0 : not equal
3861 */
3862 static int
3863 key_cmpspidx_exactly(struct secpolicyindex *spidx0,
3864 struct secpolicyindex *spidx1)
3865 {
3866 /* sanity */
3867 if (spidx0 == NULL && spidx1 == NULL)
3868 return 1;
3869
3870 if (spidx0 == NULL || spidx1 == NULL)
3871 return 0;
3872
3873 if (spidx0->prefs != spidx1->prefs
3874 || spidx0->prefd != spidx1->prefd
3875 || spidx0->ul_proto != spidx1->ul_proto)
3876 return 0;
3877
3878 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src,
3879 (struct sockaddr *)&spidx1->src, 1) != 0) {
3880 return 0;
3881 }
3882 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst,
3883 (struct sockaddr *)&spidx1->dst, 1) != 0) {
3884 return 0;
3885 }
3886
3887 return 1;
3888 }
3889
3890 /*
3891 * compare two secindex structure with mask.
3892 * IN:
3893 * spidx0: source, it is often in SPD.
3894 * spidx1: object, it is often from IP header.
3895 * OUT:
3896 * 1 : equal
3897 * 0 : not equal
3898 */
3899 static int
3900 key_cmpspidx_withmask(struct secpolicyindex *spidx0,
3901 struct secpolicyindex *spidx1)
3902 {
3903 /* sanity */
3904 if (spidx0 == NULL && spidx1 == NULL)
3905 return 1;
3906
3907 if (spidx0 == NULL || spidx1 == NULL)
3908 return 0;
3909
3910 if (spidx0->src.ss_family != spidx1->src.ss_family ||
3911 spidx0->dst.ss_family != spidx1->dst.ss_family ||
3912 spidx0->src.ss_len != spidx1->src.ss_len ||
3913 spidx0->dst.ss_len != spidx1->dst.ss_len)
3914 return 0;
3915
3916 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3917 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3918 && spidx0->ul_proto != spidx1->ul_proto)
3919 return 0;
3920
3921 switch (spidx0->src.ss_family) {
3922 case AF_INET:
3923 if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
3924 && satosin(&spidx0->src)->sin_port !=
3925 satosin(&spidx1->src)->sin_port)
3926 return 0;
3927 if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr,
3928 (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs))
3929 return 0;
3930 break;
3931 case AF_INET6:
3932 if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
3933 && satosin6(&spidx0->src)->sin6_port !=
3934 satosin6(&spidx1->src)->sin6_port)
3935 return 0;
3936 /*
3937 * scope_id check. if sin6_scope_id is 0, we regard it
3938 * as a wildcard scope, which matches any scope zone ID.
3939 */
3940 if (satosin6(&spidx0->src)->sin6_scope_id &&
3941 satosin6(&spidx1->src)->sin6_scope_id &&
3942 satosin6(&spidx0->src)->sin6_scope_id !=
3943 satosin6(&spidx1->src)->sin6_scope_id)
3944 return 0;
3945 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr,
3946 (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs))
3947 return 0;
3948 break;
3949 default:
3950 /* XXX */
3951 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0)
3952 return 0;
3953 break;
3954 }
3955
3956 switch (spidx0->dst.ss_family) {
3957 case AF_INET:
3958 if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY
3959 && satosin(&spidx0->dst)->sin_port !=
3960 satosin(&spidx1->dst)->sin_port)
3961 return 0;
3962 if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr,
3963 (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd))
3964 return 0;
3965 break;
3966 case AF_INET6:
3967 if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY
3968 && satosin6(&spidx0->dst)->sin6_port !=
3969 satosin6(&spidx1->dst)->sin6_port)
3970 return 0;
3971 /*
3972 * scope_id check. if sin6_scope_id is 0, we regard it
3973 * as a wildcard scope, which matches any scope zone ID.
3974 */
3975 if (satosin6(&spidx0->src)->sin6_scope_id &&
3976 satosin6(&spidx1->src)->sin6_scope_id &&
3977 satosin6(&spidx0->dst)->sin6_scope_id !=
3978 satosin6(&spidx1->dst)->sin6_scope_id)
3979 return 0;
3980 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->dst)->sin6_addr,
3981 (caddr_t)&satosin6(&spidx1->dst)->sin6_addr, spidx0->prefd))
3982 return 0;
3983 break;
3984 default:
3985 /* XXX */
3986 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.ss_len) != 0)
3987 return 0;
3988 break;
3989 }
3990
3991 /* XXX Do we check other field ? e.g. flowinfo */
3992
3993 return 1;
3994 }
3995
3996 /* returns 0 on match */
3997 static int
3998 key_sockaddrcmp(struct sockaddr *sa1, struct sockaddr *sa2, int port)
3999 {
4000 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4001 return 1;
4002
4003 switch (sa1->sa_family) {
4004 case AF_INET:
4005 if (sa1->sa_len != sizeof(struct sockaddr_in))
4006 return 1;
4007 if (satosin(sa1)->sin_addr.s_addr !=
4008 satosin(sa2)->sin_addr.s_addr) {
4009 return 1;
4010 }
4011 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4012 return 1;
4013 break;
4014 case AF_INET6:
4015 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4016 return 1; /*EINVAL*/
4017 if (satosin6(sa1)->sin6_scope_id !=
4018 satosin6(sa2)->sin6_scope_id) {
4019 return 1;
4020 }
4021 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4022 &satosin6(sa2)->sin6_addr)) {
4023 return 1;
4024 }
4025 if (port &&
4026 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4027 return 1;
4028 }
4029 default:
4030 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
4031 return 1;
4032 break;
4033 }
4034
4035 return 0;
4036 }
4037
4038 /*
4039 * compare two buffers with mask.
4040 * IN:
4041 * addr1: source
4042 * addr2: object
4043 * bits: Number of bits to compare
4044 * OUT:
4045 * 1 : equal
4046 * 0 : not equal
4047 */
4048 static int
4049 key_bbcmp(caddr_t p1, caddr_t p2, u_int bits)
4050 {
4051 u_int8_t mask;
4052
4053 /* XXX: This could be considerably faster if we compare a word
4054 * at a time, but it is complicated on LSB Endian machines */
4055
4056 /* Handle null pointers */
4057 if (p1 == NULL || p2 == NULL)
4058 return (p1 == p2);
4059
4060 while (bits >= 8) {
4061 if (*p1++ != *p2++)
4062 return 0;
4063 bits -= 8;
4064 }
4065
4066 if (bits > 0) {
4067 mask = ~((1<<(8-bits))-1);
4068 if ((*p1 & mask) != (*p2 & mask))
4069 return 0;
4070 }
4071 return 1; /* Match! */
4072 }
4073
4074 /*
4075 * time handler.
4076 * scanning SPD and SAD to check status for each entries,
4077 * and do to remove or to expire.
4078 * XXX: year 2038 problem may remain.
4079 */
4080 void
4081 key_timehandler(void *__dummy)
4082 {
4083 u_int dir;
4084 struct timeval tv;
4085
4086 microtime(&tv);
4087
4088 crit_enter();
4089
4090 /* SPD */
4091 {
4092 struct secpolicy *sp, *nextsp;
4093
4094 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4095 for (sp = LIST_FIRST(&sptree[dir]);
4096 sp != NULL;
4097 sp = nextsp) {
4098
4099 nextsp = LIST_NEXT(sp, chain);
4100
4101 if (sp->state == IPSEC_SPSTATE_DEAD) {
4102 key_freesp(sp);
4103 continue;
4104 }
4105
4106 if (sp->lifetime == 0 && sp->validtime == 0)
4107 continue;
4108
4109 /* the deletion will occur next time */
4110 if ((sp->lifetime
4111 && tv.tv_sec - sp->created > sp->lifetime)
4112 || (sp->validtime
4113 && tv.tv_sec - sp->lastused > sp->validtime)) {
4114 sp->state = IPSEC_SPSTATE_DEAD;
4115 key_spdexpire(sp);
4116 continue;
4117 }
4118 }
4119 }
4120 }
4121
4122 /* SAD */
4123 {
4124 struct secashead *sah, *nextsah;
4125 struct secasvar *sav, *nextsav;
4126
4127 for (sah = LIST_FIRST(&sahtree);
4128 sah != NULL;
4129 sah = nextsah) {
4130
4131 nextsah = LIST_NEXT(sah, chain);
4132
4133 /* if sah has been dead, then delete it and process next sah. */
4134 if (sah->state == SADB_SASTATE_DEAD) {
4135 key_delsah(sah);
4136 continue;
4137 }
4138
4139 /* if LARVAL entry doesn't become MATURE, delete it. */
4140 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
4141 sav != NULL;
4142 sav = nextsav) {
4143
4144 nextsav = LIST_NEXT(sav, chain);
4145
4146 if (tv.tv_sec - sav->created > key_larval_lifetime) {
4147 key_freesav(sav);
4148 }
4149 }
4150
4151 /*
4152 * check MATURE entry to start to send expire message
4153 * whether or not.
4154 */
4155 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
4156 sav != NULL;
4157 sav = nextsav) {
4158
4159 nextsav = LIST_NEXT(sav, chain);
4160
4161 /* we don't need to check. */
4162 if (sav->lft_s == NULL)
4163 continue;
4164
4165 /* sanity check */
4166 if (sav->lft_c == NULL) {
4167 ipseclog((LOG_DEBUG,"key_timehandler: "
4168 "There is no CURRENT time, why?\n"));
4169 continue;
4170 }
4171
4172 /* check SOFT lifetime */
4173 if (sav->lft_s->sadb_lifetime_addtime != 0
4174 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4175 /*
4176 * check the SA if it has been used.
4177 * when it hasn't been used, delete it.
4178 * i don't think such SA will be used.
4179 */
4180 if (sav->lft_c->sadb_lifetime_usetime == 0) {
4181 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4182 key_freesav(sav);
4183 sav = NULL;
4184 } else {
4185 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4186 /*
4187 * XXX If we keep to send expire
4188 * message in the status of
4189 * DYING. Do remove below code.
4190 */
4191 key_expire(sav);
4192 }
4193 }
4194
4195 /* check SOFT lifetime by bytes */
4196 /*
4197 * XXX I don't know the way to delete this SA
4198 * when new SA is installed. Caution when it's
4199 * installed too big lifetime by time.
4200 */
4201 else if (sav->lft_s->sadb_lifetime_bytes != 0
4202 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4203
4204 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4205 /*
4206 * XXX If we keep to send expire
4207 * message in the status of
4208 * DYING. Do remove below code.
4209 */
4210 key_expire(sav);
4211 }
4212 }
4213
4214 /* check DYING entry to change status to DEAD. */
4215 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
4216 sav != NULL;
4217 sav = nextsav) {
4218
4219 nextsav = LIST_NEXT(sav, chain);
4220
4221 /* we don't need to check. */
4222 if (sav->lft_h == NULL)
4223 continue;
4224
4225 /* sanity check */
4226 if (sav->lft_c == NULL) {
4227 ipseclog((LOG_DEBUG, "key_timehandler: "
4228 "There is no CURRENT time, why?\n"));
4229 continue;
4230 }
4231
4232 if (sav->lft_h->sadb_lifetime_addtime != 0
4233 && tv.tv_sec - sav->created > sav->lft_h->sadb_lifetime_addtime) {
4234 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4235 key_freesav(sav);
4236 sav = NULL;
4237 }
4238 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4239 else if (sav->lft_s != NULL
4240 && sav->lft_s->sadb_lifetime_addtime != 0
4241 && tv.tv_sec - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4242 /*
4243 * XXX: should be checked to be
4244 * installed the valid SA.
4245 */
4246
4247 /*
4248 * If there is no SA then sending
4249 * expire message.
4250 */
4251 key_expire(sav);
4252 }
4253 #endif
4254 /* check HARD lifetime by bytes */
4255 else if (sav->lft_h->sadb_lifetime_bytes != 0
4256 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4257 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4258 key_freesav(sav);
4259 sav = NULL;
4260 }
4261 }
4262
4263 /* delete entry in DEAD */
4264 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
4265 sav != NULL;
4266 sav = nextsav) {
4267
4268 nextsav = LIST_NEXT(sav, chain);
4269
4270 /* sanity check */
4271 if (sav->state != SADB_SASTATE_DEAD) {
4272 ipseclog((LOG_DEBUG, "key_timehandler: "
4273 "invalid sav->state "
4274 "(queue: %d SA: %d): "
4275 "kill it anyway\n",
4276 SADB_SASTATE_DEAD, sav->state));
4277 }
4278
4279 /*
4280 * do not call key_freesav() here.
4281 * sav should already be freed, and sav->refcnt
4282 * shows other references to sav
4283 * (such as from SPD).
4284 */
4285 }
4286 }
4287 }
4288
4289 #ifndef IPSEC_NONBLOCK_ACQUIRE
4290 /* ACQ tree */
4291 {
4292 struct secacq *acq, *nextacq;
4293
4294 for (acq = LIST_FIRST(&acqtree);
4295 acq != NULL;
4296 acq = nextacq) {
4297
4298 nextacq = LIST_NEXT(acq, chain);
4299
4300 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4301 && __LIST_CHAINED(acq)) {
4302 LIST_REMOVE(acq, chain);
4303 KFREE(acq);
4304 }
4305 }
4306 }
4307 #endif
4308
4309 /* SP ACQ tree */
4310 {
4311 struct secspacq *acq, *nextacq;
4312
4313 for (acq = LIST_FIRST(&spacqtree);
4314 acq != NULL;
4315 acq = nextacq) {
4316
4317 nextacq = LIST_NEXT(acq, chain);
4318
4319 if (tv.tv_sec - acq->created > key_blockacq_lifetime
4320 && __LIST_CHAINED(acq)) {
4321 LIST_REMOVE(acq, chain);
4322 KFREE(acq);
4323 }
4324 }
4325 }
4326
4327 /* initialize random seed */
4328 if (key_tick_init_random++ > key_int_random) {
4329 key_tick_init_random = 0;
4330 key_srandom();
4331 }
4332
4333 #ifndef IPSEC_DEBUG2
4334 /* do exchange to tick time !! */
4335 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
4336 #endif /* IPSEC_DEBUG2 */
4337
4338 crit_exit();
4339 return;
4340 }
4341
4342 /*
4343 * to initialize a seed for random()
4344 */
4345 static void
4346 key_srandom(void)
4347 {
4348 struct timeval tv;
4349
4350 microtime(&tv);
4351
4352 skrandom(tv.tv_usec);
4353
4354 return;
4355 }
4356
4357 u_long
4358 key_random(void)
4359 {
4360 u_long value;
4361
4362 key_randomfill(&value, sizeof(value));
4363 return value;
4364 }
4365
4366 void
4367 key_randomfill(void *p, size_t l)
4368 {
4369 size_t n;
4370 u_long v;
4371 static int warn = 1;
4372
4373 n = 0;
4374 n = (size_t)read_random(p, (u_int)l);
4375 /* last resort */
4376 while (n < l) {
4377 v = krandom();
4378 bcopy(&v, (u_int8_t *)p + n,
4379 l - n < sizeof(v) ? l - n : sizeof(v));
4380 n += sizeof(v);
4381
4382 if (warn) {
4383 kprintf("WARNING: pseudo-random number generator "
4384 "used for IPsec processing\n");
4385 warn = 0;
4386 }
4387 }
4388 }
4389
4390 /*
4391 * map SADB_SATYPE_* to IPPROTO_*.
4392 * if satype == SADB_SATYPE then satype is mapped to ~0.
4393 * OUT:
4394 * 0: invalid satype.
4395 */
4396 static u_int16_t
4397 key_satype2proto(u_int8_t satype)
4398 {
4399 switch (satype) {
4400 case SADB_SATYPE_UNSPEC:
4401 return IPSEC_PROTO_ANY;
4402 case SADB_SATYPE_AH:
4403 return IPPROTO_AH;
4404 case SADB_SATYPE_ESP:
4405 return IPPROTO_ESP;
4406 case SADB_X_SATYPE_IPCOMP:
4407 return IPPROTO_IPCOMP;
4408 break;
4409 default:
4410 return 0;
4411 }
4412 /* NOTREACHED */
4413 }
4414
4415 /*
4416 * map IPPROTO_* to SADB_SATYPE_*
4417 * OUT:
4418 * 0: invalid protocol type.
4419 */
4420 static u_int8_t
4421 key_proto2satype(u_int16_t proto)
4422 {
4423 switch (proto) {
4424 case IPPROTO_AH:
4425 return SADB_SATYPE_AH;
4426 case IPPROTO_ESP:
4427 return SADB_SATYPE_ESP;
4428 case IPPROTO_IPCOMP:
4429 return SADB_X_SATYPE_IPCOMP;
4430 break;
4431 default:
4432 return 0;
4433 }
4434 /* NOTREACHED */
4435 }
4436
4437 /* %%% PF_KEY */
4438 /*
4439 * SADB_GETSPI processing is to receive
4440 * <base, (SA2), src address, dst address, (SPI range)>
4441 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4442 * tree with the status of LARVAL, and send
4443 * <base, SA(*), address(SD)>
4444 * to the IKMPd.
4445 *
4446 * IN: mhp: pointer to the pointer to each header.
4447 * OUT: NULL if fail.
4448 * other if success, return pointer to the message to send.
4449 */
4450 static int
4451 key_getspi(struct socket *so, struct mbuf *m,
4452 const struct sadb_msghdr *mhp)
4453 {
4454 struct sadb_address *src0, *dst0;
4455 struct secasindex saidx;
4456 struct secashead *newsah;
4457 struct secasvar *newsav;
4458 u_int8_t proto;
4459 u_int32_t spi;
4460 u_int8_t mode;
4461 u_int32_t reqid;
4462 int error;
4463
4464 /* sanity check */
4465 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4466 panic("key_getspi: NULL pointer is passed.\n");
4467
4468 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4469 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4470 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4471 return key_senderror(so, m, EINVAL);
4472 }
4473 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4474 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4475 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4476 return key_senderror(so, m, EINVAL);
4477 }
4478 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4479 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4480 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4481 } else {
4482 mode = IPSEC_MODE_ANY;
4483 reqid = 0;
4484 }
4485
4486 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4487 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4488
4489 /* map satype to proto */
4490 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4491 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
4492 return key_senderror(so, m, EINVAL);
4493 }
4494
4495 /* make sure if port number is zero. */
4496 switch (((struct sockaddr *)(src0 + 1))->sa_family) {
4497 case AF_INET:
4498 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4499 sizeof(struct sockaddr_in))
4500 return key_senderror(so, m, EINVAL);
4501 ((struct sockaddr_in *)(src0 + 1))->sin_port = 0;
4502 break;
4503 case AF_INET6:
4504 if (((struct sockaddr *)(src0 + 1))->sa_len !=
4505 sizeof(struct sockaddr_in6))
4506 return key_senderror(so, m, EINVAL);
4507 ((struct sockaddr_in6 *)(src0 + 1))->sin6_port = 0;
4508 break;
4509 default:
4510 ; /*???*/
4511 }
4512 switch (((struct sockaddr *)(dst0 + 1))->sa_family) {
4513 case AF_INET:
4514 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4515 sizeof(struct sockaddr_in))
4516 return key_senderror(so, m, EINVAL);
4517 ((struct sockaddr_in *)(dst0 + 1))->sin_port = 0;
4518 break;
4519 case AF_INET6:
4520 if (((struct sockaddr *)(dst0 + 1))->sa_len !=
4521 sizeof(struct sockaddr_in6))
4522 return key_senderror(so, m, EINVAL);
4523 ((struct sockaddr_in6 *)(dst0 + 1))->sin6_port = 0;
4524 break;
4525 default:
4526 ; /*???*/
4527 }
4528
4529 /* XXX boundary check against sa_len */
4530 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4531
4532 /* SPI allocation */
4533 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4534 &saidx);
4535 if (spi == 0)
4536 return key_senderror(so, m, EINVAL);
4537
4538 /* get a SA index */
4539 if ((newsah = key_getsah(&saidx)) == NULL) {
4540 /* create a new SA index */
4541 if ((newsah = key_newsah(&saidx)) == NULL) {
4542 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
4543 return key_senderror(so, m, ENOBUFS);
4544 }
4545 }
4546
4547 /* get a new SA */
4548 /* XXX rewrite */
4549 newsav = key_newsav(m, mhp, newsah, &error);
4550 if (newsav == NULL) {
4551 /* XXX don't free new SA index allocated in above. */
4552 return key_senderror(so, m, error);
4553 }
4554
4555 /* set spi */
4556 newsav->spi = htonl(spi);
4557
4558 #ifndef IPSEC_NONBLOCK_ACQUIRE
4559 /* delete the entry in acqtree */
4560 if (mhp->msg->sadb_msg_seq != 0) {
4561 struct secacq *acq;
4562 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4563 /* reset counter in order to deletion by timehandler. */
4564 struct timeval tv;
4565 microtime(&tv);
4566 acq->created = tv.tv_sec;
4567 acq->count = 0;
4568 }
4569 }
4570 #endif
4571
4572 {
4573 struct mbuf *n, *nn;
4574 struct sadb_sa *m_sa;
4575 struct sadb_msg *newmsg;
4576 int off, len;
4577
4578 /* create new sadb_msg to reply. */
4579 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4580 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4581 if (len > MCLBYTES)
4582 return key_senderror(so, m, ENOBUFS);
4583
4584 MGETHDR(n, MB_DONTWAIT, MT_DATA);
4585 if (len > MHLEN) {
4586 MCLGET(n, MB_DONTWAIT);
4587 if ((n->m_flags & M_EXT) == 0) {
4588 m_freem(n);
4589 n = NULL;
4590 }
4591 }
4592 if (!n)
4593 return key_senderror(so, m, ENOBUFS);
4594
4595 n->m_len = len;
4596 n->m_next = NULL;
4597 off = 0;
4598
4599 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
4600 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4601
4602 m_sa = (struct sadb_sa *)(mtod(n, caddr_t) + off);
4603 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4604 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4605 m_sa->sadb_sa_spi = htonl(spi);
4606 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4607
4608 #ifdef DIAGNOSTIC
4609 if (off != len)
4610 panic("length inconsistency in key_getspi");
4611 #endif
4612
4613 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4614 SADB_EXT_ADDRESS_DST);
4615 if (!n->m_next) {
4616 m_freem(n);
4617 return key_senderror(so, m, ENOBUFS);
4618 }
4619
4620 if (n->m_len < sizeof(struct sadb_msg)) {
4621 n = m_pullup(n, sizeof(struct sadb_msg));
4622 if (n == NULL)
4623 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
4624 }
4625
4626 n->m_pkthdr.len = 0;
4627 for (nn = n; nn; nn = nn->m_next)
4628 n->m_pkthdr.len += nn->m_len;
4629
4630 newmsg = mtod(n, struct sadb_msg *);
4631 newmsg->sadb_msg_seq = newsav->seq;
4632 newmsg->sadb_msg_errno = 0;
4633 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
4634
4635 m_freem(m);
4636 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
4637 }
4638 }
4639
4640 /*
4641 * allocating new SPI
4642 * called by key_getspi().
4643 * OUT:
4644 * 0: failure.
4645 * others: success.
4646 */
4647 static u_int32_t
4648 key_do_getnewspi(struct sadb_spirange *spirange,
4649 struct secasindex *saidx)
4650 {
4651 u_int32_t newspi;
4652 u_int32_t min, max;
4653 int count = key_spi_trycnt;
4654
4655 /* set spi range to allocate */
4656 if (spirange != NULL) {
4657 min = spirange->sadb_spirange_min;
4658 max = spirange->sadb_spirange_max;
4659 } else {
4660 min = key_spi_minval;
4661 max = key_spi_maxval;
4662 }
4663 /* IPCOMP needs 2-byte SPI */
4664 if (saidx->proto == IPPROTO_IPCOMP) {
4665 u_int32_t t;
4666 if (min >= 0x10000)
4667 min = 0xffff;
4668 if (max >= 0x10000)
4669 max = 0xffff;
4670 if (min > max) {
4671 t = min; min = max; max = t;
4672 }
4673 }
4674
4675 if (min == max) {
4676 if (key_checkspidup(saidx, min) != NULL) {
4677 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", min));
4678 return 0;
4679 }
4680
4681 count--; /* taking one cost. */
4682 newspi = min;
4683
4684 } else {
4685
4686 /* init SPI */
4687 newspi = 0;
4688
4689 /* when requesting to allocate spi ranged */
4690 while (count--) {
4691 /* generate pseudo-random SPI value ranged. */
4692 newspi = min + (key_random() % (max - min + 1));
4693
4694 if (key_checkspidup(saidx, newspi) == NULL)
4695 break;
4696 }
4697
4698 if (count == 0 || newspi == 0) {
4699 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
4700 return 0;
4701 }
4702 }
4703
4704 /* statistics */
4705 keystat.getspi_count =
4706 (keystat.getspi_count + key_spi_trycnt - count) / 2;
4707
4708 return newspi;
4709 }
4710
4711 /*
4712 * SADB_UPDATE processing
4713 * receive
4714 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4715 * key(AE), (identity(SD),) (sensitivity)>
4716 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
4717 * and send
4718 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4719 * (identity(SD),) (sensitivity)>
4720 * to the ikmpd.
4721 *
4722 * m will always be freed.
4723 */
4724 static int
4725 key_update(struct socket *so, struct mbuf *m,
4726 const struct sadb_msghdr *mhp)
4727 {
4728 struct sadb_sa *sa0;
4729 struct sadb_address *src0, *dst0;
4730 struct secasindex saidx;
4731 struct secashead *sah;
4732 struct secasvar *sav;
4733 u_int16_t proto;
4734 u_int8_t mode;
4735 u_int32_t reqid;
4736 int error;
4737
4738 /* sanity check */
4739 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4740 panic("key_update: NULL pointer is passed.\n");
4741
4742 /* map satype to proto */
4743 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4744 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
4745 return key_senderror(so, m, EINVAL);
4746 }
4747
4748 if (mhp->ext[SADB_EXT_SA] == NULL ||
4749 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4750 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4751 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4752 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4753 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4754 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4755 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4756 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4757 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4758 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4759 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4760 return key_senderror(so, m, EINVAL);
4761 }
4762 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4763 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4764 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4765 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
4766 return key_senderror(so, m, EINVAL);
4767 }
4768 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4769 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4770 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4771 } else {
4772 mode = IPSEC_MODE_ANY;
4773 reqid = 0;
4774 }
4775 /* XXX boundary checking for other extensions */
4776
4777 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4778 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4779 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4780
4781 /* XXX boundary check against sa_len */
4782 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4783
4784 /* get a SA header */
4785 if ((sah = key_getsah(&saidx)) == NULL) {
4786 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
4787 return key_senderror(so, m, ENOENT);
4788 }
4789
4790 /* set spidx if there */
4791 /* XXX rewrite */
4792 error = key_setident(sah, m, mhp);
4793 if (error)
4794 return key_senderror(so, m, error);
4795
4796 /* find a SA with sequence number. */
4797 #ifdef IPSEC_DOSEQCHECK
4798 if (mhp->msg->sadb_msg_seq != 0
4799 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
4800 ipseclog((LOG_DEBUG,
4801 "key_update: no larval SA with sequence %u exists.\n",
4802 mhp->msg->sadb_msg_seq));
4803 return key_senderror(so, m, ENOENT);
4804 }
4805 #else
4806 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
4807 ipseclog((LOG_DEBUG,
4808 "key_update: no such a SA found (spi:%u)\n",
4809 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4810 return key_senderror(so, m, EINVAL);
4811 }
4812 #endif
4813
4814 /* validity check */
4815 if (sav->sah->saidx.proto != proto) {
4816 ipseclog((LOG_DEBUG,
4817 "key_update: protocol mismatched (DB=%u param=%u)\n",
4818 sav->sah->saidx.proto, proto));
4819 return key_senderror(so, m, EINVAL);
4820 }
4821 #ifdef IPSEC_DOSEQCHECK
4822 if (sav->spi != sa0->sadb_sa_spi) {
4823 ipseclog((LOG_DEBUG,
4824 "key_update: SPI mismatched (DB:%u param:%u)\n",
4825 (u_int32_t)ntohl(sav->spi),
4826 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
4827 return key_senderror(so, m, EINVAL);
4828 }
4829 #endif
4830 if (sav->pid != mhp->msg->sadb_msg_pid) {
4831 ipseclog((LOG_DEBUG,
4832 "key_update: pid mismatched (DB:%u param:%u)\n",
4833 sav->pid, mhp->msg->sadb_msg_pid));
4834 return key_senderror(so, m, EINVAL);
4835 }
4836
4837 /* copy sav values */
4838 error = key_setsaval(sav, m, mhp);
4839 if (error) {
4840 key_freesav(sav);
4841 return key_senderror(so, m, error);
4842 }
4843
4844 /* check SA values to be mature. */
4845 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
4846 key_freesav(sav);
4847 return key_senderror(so, m, 0);
4848 }
4849
4850 {
4851 struct mbuf *n;
4852
4853 /* set msg buf from mhp */
4854 n = key_getmsgbuf_x1(m, mhp);
4855 if (n == NULL) {
4856 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
4857 return key_senderror(so, m, ENOBUFS);
4858 }
4859
4860 m_freem(m);
4861 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
4862 }
4863 }
4864
4865 /*
4866 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
4867 * only called by key_update().
4868 * OUT:
4869 * NULL : not found
4870 * others : found, pointer to a SA.
4871 */
4872 #ifdef IPSEC_DOSEQCHECK
4873 static struct secasvar *
4874 key_getsavbyseq(struct secashead *sah, u_int32_t seq)
4875 {
4876 struct secasvar *sav;
4877 u_int state;
4878
4879 state = SADB_SASTATE_LARVAL;
4880
4881 /* search SAD with sequence number ? */
4882 LIST_FOREACH(sav, &sah->savtree[state], chain) {
4883
4884 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
4885
4886 if (sav->seq == seq) {
4887 sav->refcnt++;
4888 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
4889 kprintf("DP key_getsavbyseq cause "
4890 "refcnt++:%d SA:%p\n",
4891 sav->refcnt, sav));
4892 return sav;
4893 }
4894 }
4895
4896 return NULL;
4897 }
4898 #endif
4899
4900 /*
4901 * SADB_ADD processing
4902 * add a entry to SA database, when received
4903 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4904 * key(AE), (identity(SD),) (sensitivity)>
4905 * from the ikmpd,
4906 * and send
4907 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
4908 * (identity(SD),) (sensitivity)>
4909 * to the ikmpd.
4910 *
4911 * IGNORE identity and sensitivity messages.
4912 *
4913 * m will always be freed.
4914 */
4915 static int
4916 key_add(struct socket *so, struct mbuf *m,
4917 const struct sadb_msghdr *mhp)
4918 {
4919 struct sadb_sa *sa0;
4920 struct sadb_address *src0, *dst0;
4921 struct secasindex saidx;
4922 struct secashead *newsah;
4923 struct secasvar *newsav;
4924 u_int16_t proto;
4925 u_int8_t mode;
4926 u_int32_t reqid;
4927 int error;
4928
4929 /* sanity check */
4930 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4931 panic("key_add: NULL pointer is passed.\n");
4932
4933 /* map satype to proto */
4934 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4935 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
4936 return key_senderror(so, m, EINVAL);
4937 }
4938
4939 if (mhp->ext[SADB_EXT_SA] == NULL ||
4940 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4941 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
4942 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
4943 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
4944 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
4945 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
4946 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
4947 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
4948 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
4949 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
4950 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4951 return key_senderror(so, m, EINVAL);
4952 }
4953 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
4954 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4955 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4956 /* XXX need more */
4957 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
4958 return key_senderror(so, m, EINVAL);
4959 }
4960 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4961 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4962 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4963 } else {
4964 mode = IPSEC_MODE_ANY;
4965 reqid = 0;
4966 }
4967
4968 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
4969 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
4970 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
4971
4972 /* XXX boundary check against sa_len */
4973 KEY_SETSECASIDX(proto, mode, reqid, src0 + 1, dst0 + 1, &saidx);
4974
4975 /* get a SA header */
4976 if ((newsah = key_getsah(&saidx)) == NULL) {
4977 /* create a new SA header */
4978 if ((newsah = key_newsah(&saidx)) == NULL) {
4979 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
4980 return key_senderror(so, m, ENOBUFS);
4981 }
4982 }
4983
4984 /* set spidx if there */
4985 /* XXX rewrite */
4986 error = key_setident(newsah, m, mhp);
4987 if (error) {
4988 return key_senderror(so, m, error);
4989 }
4990
4991 /* create new SA entry. */
4992 /* We can create new SA only if SPI is differenct. */
4993 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
4994 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
4995 return key_senderror(so, m, EEXIST);
4996 }
4997 newsav = key_newsav(m, mhp, newsah, &error);
4998 if (newsav == NULL) {
4999 return key_senderror(so, m, error);
5000 }
5001
5002 /* check SA values to be mature. */
5003 if ((error = key_mature(newsav)) != 0) {
5004 key_freesav(newsav);
5005 return key_senderror(so, m, error);
5006 }
5007
5008 /*
5009 * don't call key_freesav() here, as we would like to keep the SA
5010 * in the database on success.
5011 */
5012
5013 {
5014 struct mbuf *n;
5015
5016 /* set msg buf from mhp */
5017 n = key_getmsgbuf_x1(m, mhp);
5018 if (n == NULL) {
5019 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
5020 return key_senderror(so, m, ENOBUFS);
5021 }
5022
5023 m_freem(m);
5024 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5025 }
5026 }
5027
5028 /* m is retained */
5029 static int
5030 key_setident(struct secashead *sah, struct mbuf *m,
5031 const struct sadb_msghdr *mhp)
5032 {
5033 const struct sadb_ident *idsrc, *iddst;
5034 int idsrclen, iddstlen;
5035
5036 /* sanity check */
5037 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5038 panic("key_setident: NULL pointer is passed.\n");
5039
5040 /* don't make buffer if not there */
5041 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
5042 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5043 sah->idents = NULL;
5044 sah->identd = NULL;
5045 return 0;
5046 }
5047
5048 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
5049 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5050 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
5051 return EINVAL;
5052 }
5053
5054 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5055 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5056 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5057 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5058
5059 /* validity check */
5060 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5061 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
5062 return EINVAL;
5063 }
5064
5065 switch (idsrc->sadb_ident_type) {
5066 case SADB_IDENTTYPE_PREFIX:
5067 case SADB_IDENTTYPE_FQDN:
5068 case SADB_IDENTTYPE_USERFQDN:
5069 default:
5070 /* XXX do nothing */
5071 sah->idents = NULL;
5072 sah->identd = NULL;
5073 return 0;
5074 }
5075
5076 /* make structure */
5077 KMALLOC(sah->idents, struct sadb_ident *, idsrclen);
5078 if (sah->idents == NULL) {
5079 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5080 return ENOBUFS;
5081 }
5082 KMALLOC(sah->identd, struct sadb_ident *, iddstlen);
5083 if (sah->identd == NULL) {
5084 KFREE(sah->idents);
5085 sah->idents = NULL;
5086 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5087 return ENOBUFS;
5088 }
5089 bcopy(idsrc, sah->idents, idsrclen);
5090 bcopy(iddst, sah->identd, iddstlen);
5091
5092 return 0;
5093 }
5094
5095 /*
5096 * m will not be freed on return.
5097 * it is caller's responsibility to free the result.
5098 */
5099 static struct mbuf *
5100 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5101 {
5102 struct mbuf *n;
5103
5104 /* sanity check */
5105 if (m == NULL || mhp == NULL || mhp->msg == NULL)
5106 panic("key_getmsgbuf_x1: NULL pointer is passed.\n");
5107
5108 /* create new sadb_msg to reply. */
5109 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5110 SADB_EXT_SA, SADB_X_EXT_SA2,
5111 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5112 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5113 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5114 if (!n)
5115 return NULL;
5116
5117 if (n->m_len < sizeof(struct sadb_msg)) {
5118 n = m_pullup(n, sizeof(struct sadb_msg));
5119 if (n == NULL)
5120 return NULL;
5121 }
5122 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5123 mtod(n, struct sadb_msg *)->sadb_msg_len =
5124 PFKEY_UNIT64(n->m_pkthdr.len);
5125
5126 return n;
5127 }
5128
5129 static int key_delete_all (struct socket *, struct mbuf *,
5130 const struct sadb_msghdr *, u_int16_t);
5131
5132 /*
5133 * SADB_DELETE processing
5134 * receive
5135 * <base, SA(*), address(SD)>
5136 * from the ikmpd, and set SADB_SASTATE_DEAD,
5137 * and send,
5138 * <base, SA(*), address(SD)>
5139 * to the ikmpd.
5140 *
5141 * m will always be freed.
5142 */
5143 static int
5144 key_delete(struct socket *so, struct mbuf *m,
5145 const struct sadb_msghdr *mhp)
5146 {
5147 struct sadb_sa *sa0;
5148 struct sadb_address *src0, *dst0;
5149 struct secasindex saidx;
5150 struct secashead *sah;
5151 struct secasvar *sav = NULL;
5152 u_int16_t proto;
5153
5154 /* sanity check */
5155 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5156 panic("key_delete: NULL pointer is passed.\n");
5157
5158 /* map satype to proto */
5159 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5160 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
5161 return key_senderror(so, m, EINVAL);
5162 }
5163
5164 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5165 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5166 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5167 return key_senderror(so, m, EINVAL);
5168 }
5169
5170 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5171 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5172 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5173 return key_senderror(so, m, EINVAL);
5174 }
5175
5176 if (mhp->ext[SADB_EXT_SA] == NULL) {
5177 /*
5178 * Caller wants us to delete all non-LARVAL SAs
5179 * that match the src/dst. This is used during
5180 * IKE INITIAL-CONTACT.
5181 */
5182 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
5183 return key_delete_all(so, m, mhp, proto);
5184 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5185 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5186 return key_senderror(so, m, EINVAL);
5187 }
5188
5189 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5190 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5191 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5192
5193 /* XXX boundary check against sa_len */
5194 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5195
5196 /* get a SA header */
5197 LIST_FOREACH(sah, &sahtree, chain) {
5198 if (sah->state == SADB_SASTATE_DEAD)
5199 continue;
5200 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5201 continue;
5202
5203 /* get a SA with SPI. */
5204 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5205 if (sav)
5206 break;
5207 }
5208 if (sah == NULL) {
5209 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
5210 return key_senderror(so, m, ENOENT);
5211 }
5212
5213 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5214 key_freesav(sav);
5215 sav = NULL;
5216
5217 {
5218 struct mbuf *n;
5219 struct sadb_msg *newmsg;
5220
5221 /* create new sadb_msg to reply. */
5222 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5223 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5224 if (!n)
5225 return key_senderror(so, m, ENOBUFS);
5226
5227 if (n->m_len < sizeof(struct sadb_msg)) {
5228 n = m_pullup(n, sizeof(struct sadb_msg));
5229 if (n == NULL)
5230 return key_senderror(so, m, ENOBUFS);
5231 }
5232 newmsg = mtod(n, struct sadb_msg *);
5233 newmsg->sadb_msg_errno = 0;
5234 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5235
5236 m_freem(m);
5237 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5238 }
5239 }
5240
5241 /*
5242 * delete all SAs for src/dst. Called from key_delete().
5243 */
5244 static int
5245 key_delete_all(struct socket *so, struct mbuf *m,
5246 const struct sadb_msghdr *mhp, u_int16_t proto)
5247 {
5248 struct sadb_address *src0, *dst0;
5249 struct secasindex saidx;
5250 struct secashead *sah;
5251 struct secasvar *sav, *nextsav;
5252 u_int stateidx, state;
5253
5254 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5255 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5256
5257 /* XXX boundary check against sa_len */
5258 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5259
5260 LIST_FOREACH(sah, &sahtree, chain) {
5261 if (sah->state == SADB_SASTATE_DEAD)
5262 continue;
5263 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5264 continue;
5265
5266 /* Delete all non-LARVAL SAs. */
5267 for (stateidx = 0;
5268 stateidx < _ARRAYLEN(saorder_state_alive);
5269 stateidx++) {
5270 state = saorder_state_alive[stateidx];
5271 if (state == SADB_SASTATE_LARVAL)
5272 continue;
5273 for (sav = LIST_FIRST(&sah->savtree[state]);
5274 sav != NULL; sav = nextsav) {
5275 nextsav = LIST_NEXT(sav, chain);
5276 /* sanity check */
5277 if (sav->state != state) {
5278 ipseclog((LOG_DEBUG, "key_delete_all: "
5279 "invalid sav->state "
5280 "(queue: %d SA: %d)\n",
5281 state, sav->state));
5282 continue;
5283 }
5284
5285 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5286 key_freesav(sav);
5287 }
5288 }
5289 }
5290 {
5291 struct mbuf *n;
5292 struct sadb_msg *newmsg;
5293
5294 /* create new sadb_msg to reply. */
5295 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5296 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5297 if (!n)
5298 return key_senderror(so, m, ENOBUFS);
5299
5300 if (n->m_len < sizeof(struct sadb_msg)) {
5301 n = m_pullup(n, sizeof(struct sadb_msg));
5302 if (n == NULL)
5303 return key_senderror(so, m, ENOBUFS);
5304 }
5305 newmsg = mtod(n, struct sadb_msg *);
5306 newmsg->sadb_msg_errno = 0;
5307 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5308
5309 m_freem(m);
5310 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5311 }
5312 }
5313
5314 /*
5315 * SADB_GET processing
5316 * receive
5317 * <base, SA(*), address(SD)>
5318 * from the ikmpd, and get a SP and a SA to respond,
5319 * and send,
5320 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5321 * (identity(SD),) (sensitivity)>
5322 * to the ikmpd.
5323 *
5324 * m will always be freed.
5325 */
5326 static int
5327 key_get(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5328 {
5329 struct sadb_sa *sa0;
5330 struct sadb_address *src0, *dst0;
5331 struct secasindex saidx;
5332 struct secashead *sah;
5333 struct secasvar *sav = NULL;
5334 u_int16_t proto;
5335
5336 /* sanity check */
5337 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5338 panic("key_get: NULL pointer is passed.\n");
5339
5340 /* map satype to proto */
5341 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5342 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
5343 return key_senderror(so, m, EINVAL);
5344 }
5345
5346 if (mhp->ext[SADB_EXT_SA] == NULL ||
5347 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5348 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5349 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5350 return key_senderror(so, m, EINVAL);
5351 }
5352 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5353 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5354 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5355 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5356 return key_senderror(so, m, EINVAL);
5357 }
5358
5359 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5360 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5361 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5362
5363 /* XXX boundary check against sa_len */
5364 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
5365
5366 /* get a SA header */
5367 LIST_FOREACH(sah, &sahtree, chain) {
5368 if (sah->state == SADB_SASTATE_DEAD)
5369 continue;
5370 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5371 continue;
5372
5373 /* get a SA with SPI. */
5374 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5375 if (sav)
5376 break;
5377 }
5378 if (sah == NULL) {
5379 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
5380 return key_senderror(so, m, ENOENT);
5381 }
5382
5383 {
5384 struct mbuf *n;
5385 u_int8_t satype;
5386
5387 /* map proto to satype */
5388 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5389 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
5390 return key_senderror(so, m, EINVAL);
5391 }
5392
5393 /* create new sadb_msg to reply. */
5394 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5395 mhp->msg->sadb_msg_pid);
5396 if (!n)
5397 return key_senderror(so, m, ENOBUFS);
5398
5399 m_freem(m);
5400 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5401 }
5402 }
5403
5404 /* XXX make it sysctl-configurable? */
5405 static void
5406 key_getcomb_setlifetime(struct sadb_comb *comb)
5407 {
5408
5409 comb->sadb_comb_soft_allocations = 1;
5410 comb->sadb_comb_hard_allocations = 1;
5411 comb->sadb_comb_soft_bytes = 0;
5412 comb->sadb_comb_hard_bytes = 0;
5413 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5414 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5415 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5416 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5417 }
5418
5419 #ifdef IPSEC_ESP
5420 /*
5421 * XXX reorder combinations by preference
5422 * XXX no idea if the user wants ESP authentication or not
5423 */
5424 static struct mbuf *
5425 key_getcomb_esp(void)
5426 {
5427 struct sadb_comb *comb;
5428 const struct esp_algorithm *algo;
5429 struct mbuf *result = NULL, *m, *n;
5430 int encmin;
5431 int i, off, o;
5432 int totlen;
5433 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5434
5435 m = NULL;
5436 for (i = 1; i <= SADB_EALG_MAX; i++) {
5437 algo = esp_algorithm_lookup(i);
5438 if (!algo)
5439 continue;
5440
5441 if (algo->keymax < ipsec_esp_keymin)
5442 continue;
5443 if (algo->keymin < ipsec_esp_keymin)
5444 encmin = ipsec_esp_keymin;
5445 else
5446 encmin = algo->keymin;
5447
5448 if (ipsec_esp_auth)
5449 m = key_getcomb_ah();
5450 else {
5451 #ifdef DIAGNOSTIC
5452 if (l > MLEN)
5453 panic("assumption failed in key_getcomb_esp");
5454 #endif
5455 MGET(m, MB_DONTWAIT, MT_DATA);
5456 if (m) {
5457 M_ALIGN(m, l);
5458 m->m_len = l;
5459 m->m_next = NULL;
5460 bzero(mtod(m, caddr_t), m->m_len);
5461 }
5462 }
5463 if (!m)
5464 goto fail;
5465
5466 totlen = 0;
5467 for (n = m; n; n = n->m_next)
5468 totlen += n->m_len;
5469 #ifdef DIAGNOSTIC
5470 if (totlen % l)
5471 panic("assumption failed in key_getcomb_esp");
5472 #endif
5473
5474 for (off = 0; off < totlen; off += l) {
5475 n = m_pulldown(m, off, l, &o);
5476 if (!n) {
5477 /* m is already freed */
5478 goto fail;
5479 }
5480 comb = (struct sadb_comb *)(mtod(n, caddr_t) + o);
5481 bzero(comb, sizeof(*comb));
5482 key_getcomb_setlifetime(comb);
5483 comb->sadb_comb_encrypt = i;
5484 comb->sadb_comb_encrypt_minbits = encmin;
5485 comb->sadb_comb_encrypt_maxbits = algo->keymax;
5486 }
5487
5488 if (!result)
5489 result = m;
5490 else
5491 m_cat(result, m);
5492 }
5493
5494 return result;
5495
5496 fail:
5497 if (result)
5498 m_freem(result);
5499 return NULL;
5500 }
5501 #endif
5502
5503 /*
5504 * XXX reorder combinations by preference
5505 */
5506 static struct mbuf *
5507 key_getcomb_ah(void)
5508 {
5509 struct sadb_comb *comb;
5510 const struct ah_algorithm *algo;
5511 struct mbuf *m;
5512 int min;
5513 int i;
5514 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5515
5516 m = NULL;
5517 for (i = 1; i <= SADB_AALG_MAX; i++) {
5518 #if 1
5519 /* we prefer HMAC algorithms, not old algorithms */
5520 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
5521 continue;
5522 #endif
5523 algo = ah_algorithm_lookup(i);
5524 if (!algo)
5525 continue;
5526
5527 if (algo->keymax < ipsec_ah_keymin)
5528 continue;
5529 if (algo->keymin < ipsec_ah_keymin)
5530 min = ipsec_ah_keymin;
5531 else
5532 min = algo->keymin;
5533
5534 if (!m) {
5535 #ifdef DIAGNOSTIC
5536 if (l > MLEN)
5537 panic("assumption failed in key_getcomb_ah");
5538 #endif
5539 MGET(m, MB_DONTWAIT, MT_DATA);
5540 if (m) {
5541 M_ALIGN(m, l);
5542 m->m_len = l;
5543 m->m_next = NULL;
5544 }
5545 } else
5546 M_PREPEND(m, l, MB_DONTWAIT);
5547 if (!m)
5548 return NULL;
5549
5550 comb = mtod(m, struct sadb_comb *);
5551 bzero(comb, sizeof(*comb));
5552 key_getcomb_setlifetime(comb);
5553 comb->sadb_comb_auth = i;
5554 comb->sadb_comb_auth_minbits = min;
5555 comb->sadb_comb_auth_maxbits = algo->keymax;
5556 }
5557
5558 return m;
5559 }
5560
5561 /*
5562 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
5563 * XXX reorder combinations by preference
5564 */
5565 static struct mbuf *
5566 key_getcomb_ipcomp(void)
5567 {
5568 struct sadb_comb *comb;
5569 const struct ipcomp_algorithm *algo;
5570 struct mbuf *m;
5571 int i;
5572 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5573
5574 m = NULL;
5575 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
5576 algo = ipcomp_algorithm_lookup(i);
5577 if (!algo)
5578 continue;
5579
5580 if (!m) {
5581 #ifdef DIAGNOSTIC
5582 if (l > MLEN)
5583 panic("assumption failed in key_getcomb_ipcomp");
5584 #endif
5585 MGET(m, MB_DONTWAIT, MT_DATA);
5586 if (m) {
5587 M_ALIGN(m, l);
5588 m->m_len = l;
5589 m->m_next = NULL;
5590 }
5591 } else
5592 M_PREPEND(m, l, MB_DONTWAIT);
5593 if (!m)
5594 return NULL;
5595
5596 comb = mtod(m, struct sadb_comb *);
5597 bzero(comb, sizeof(*comb));
5598 key_getcomb_setlifetime(comb);
5599 comb->sadb_comb_encrypt = i;
5600 /* what should we set into sadb_comb_*_{min,max}bits? */
5601 }
5602
5603 return m;
5604 }
5605
5606 /*
5607 * XXX no way to pass mode (transport/tunnel) to userland
5608 * XXX replay checking?
5609 * XXX sysctl interface to ipsec_{ah,esp}_keymin
5610 */
5611 static struct mbuf *
5612 key_getprop(const struct secasindex *saidx)
5613 {
5614 struct sadb_prop *prop;
5615 struct mbuf *m, *n;
5616 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
5617 int totlen;
5618
5619 switch (saidx->proto) {
5620 #ifdef IPSEC_ESP
5621 case IPPROTO_ESP:
5622 m = key_getcomb_esp();
5623 break;
5624 #endif
5625 case IPPROTO_AH:
5626 m = key_getcomb_ah();
5627 break;
5628 case IPPROTO_IPCOMP:
5629 m = key_getcomb_ipcomp();
5630 break;
5631 default:
5632 return NULL;
5633 }
5634
5635 if (!m)
5636 return NULL;
5637 M_PREPEND(m, l, MB_DONTWAIT);
5638 if (!m)
5639 return NULL;
5640
5641 totlen = 0;
5642 for (n = m; n; n = n->m_next)
5643 totlen += n->m_len;
5644
5645 prop = mtod(m, struct sadb_prop *);
5646 bzero(prop, sizeof(*prop));
5647 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
5648 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
5649 prop->sadb_prop_replay = 32; /* XXX */
5650
5651 return m;
5652 }
5653
5654 /*
5655 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
5656 * send
5657 * <base, SA, address(SD), (address(P)), x_policy,
5658 * (identity(SD),) (sensitivity,) proposal>
5659 * to KMD, and expect to receive
5660 * <base> with SADB_ACQUIRE if error occured,
5661 * or
5662 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
5663 * from KMD by PF_KEY.
5664 *
5665 * XXX x_policy is outside of RFC2367 (KAME extension).
5666 * XXX sensitivity is not supported.
5667 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
5668 * see comment for key_getcomb_ipcomp().
5669 *
5670 * OUT:
5671 * 0 : succeed
5672 * others: error number
5673 */
5674 static int
5675 key_acquire(struct secasindex *saidx, struct secpolicy *sp)
5676 {
5677 struct mbuf *result = NULL, *m;
5678 #ifndef IPSEC_NONBLOCK_ACQUIRE
5679 struct secacq *newacq;
5680 #endif
5681 u_int8_t satype;
5682 int error = -1;
5683 u_int32_t seq;
5684
5685 /* sanity check */
5686 if (saidx == NULL)
5687 panic("key_acquire: NULL pointer is passed.\n");
5688 if ((satype = key_proto2satype(saidx->proto)) == 0)
5689 panic("key_acquire: invalid proto is passed.\n");
5690
5691 #ifndef IPSEC_NONBLOCK_ACQUIRE
5692 /*
5693 * We never do anything about acquirng SA. There is anather
5694 * solution that kernel blocks to send SADB_ACQUIRE message until
5695 * getting something message from IKEd. In later case, to be
5696 * managed with ACQUIRING list.
5697 */
5698 /* get a entry to check whether sending message or not. */
5699 if ((newacq = key_getacq(saidx)) != NULL) {
5700 if (key_blockacq_count < newacq->count) {
5701 /* reset counter and do send message. */
5702 newacq->count = 0;
5703 } else {
5704 /* increment counter and do nothing. */
5705 newacq->count++;
5706 return 0;
5707 }
5708 } else {
5709 /* make new entry for blocking to send SADB_ACQUIRE. */
5710 if ((newacq = key_newacq(saidx)) == NULL)
5711 return ENOBUFS;
5712
5713 /* add to acqtree */
5714 LIST_INSERT_HEAD(&acqtree, newacq, chain);
5715 }
5716 #endif
5717
5718
5719 #ifndef IPSEC_NONBLOCK_ACQUIRE
5720 seq = newacq->seq;
5721 #else
5722 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
5723 #endif
5724 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
5725 if (!m) {
5726 error = ENOBUFS;
5727 goto fail;
5728 }
5729 result = m;
5730
5731 /* set sadb_address for saidx's. */
5732 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
5733 (struct sockaddr *)&saidx->src, FULLMASK, IPSEC_ULPROTO_ANY);
5734 if (!m) {
5735 error = ENOBUFS;
5736 goto fail;
5737 }
5738 m_cat(result, m);
5739
5740 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
5741 (struct sockaddr *)&saidx->dst, FULLMASK, IPSEC_ULPROTO_ANY);
5742 if (!m) {
5743 error = ENOBUFS;
5744 goto fail;
5745 }
5746 m_cat(result, m);
5747
5748 /* XXX proxy address (optional) */
5749
5750 /* set sadb_x_policy */
5751 if (sp) {
5752 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
5753 if (!m) {
5754 error = ENOBUFS;
5755 goto fail;
5756 }
5757 m_cat(result, m);
5758 }
5759
5760 /* XXX identity (optional) */
5761 #if 0
5762 if (idexttype && fqdn) {
5763 /* create identity extension (FQDN) */
5764 struct sadb_ident *id;
5765 int fqdnlen;
5766
5767 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
5768 id = (struct sadb_ident *)p;
5769 bzero(id, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5770 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
5771 id->sadb_ident_exttype = idexttype;
5772 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
5773 bcopy(fqdn, id + 1, fqdnlen);
5774 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
5775 }
5776
5777 if (idexttype) {
5778 /* create identity extension (USERFQDN) */
5779 struct sadb_ident *id;
5780 int userfqdnlen;
5781
5782 if (userfqdn) {
5783 /* +1 for terminating-NUL */
5784 userfqdnlen = strlen(userfqdn) + 1;
5785 } else
5786 userfqdnlen = 0;
5787 id = (struct sadb_ident *)p;
5788 bzero(id, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5789 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
5790 id->sadb_ident_exttype = idexttype;
5791 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
5792 /* XXX is it correct? */
5793 if (curproc && curproc->p_cred)
5794 id->sadb_ident_id = curproc->p_cred->p_ruid;
5795 if (userfqdn && userfqdnlen)
5796 bcopy(userfqdn, id + 1, userfqdnlen);
5797 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
5798 }
5799 #endif
5800
5801 /* XXX sensitivity (optional) */
5802
5803 /* create proposal/combination extension */
5804 m = key_getprop(saidx);
5805 #if 0
5806 /*
5807 * spec conformant: always attach proposal/combination extension,
5808 * the problem is that we have no way to attach it for ipcomp,
5809 * due to the way sadb_comb is declared in RFC2367.
5810 */
5811 if (!m) {
5812 error = ENOBUFS;
5813 goto fail;
5814 }
5815 m_cat(result, m);
5816 #else
5817 /*
5818 * outside of spec; make proposal/combination extension optional.
5819 */
5820 if (m)
5821 m_cat(result, m);
5822 #endif
5823
5824 if ((result->m_flags & M_PKTHDR) == 0) {
5825 error = EINVAL;
5826 goto fail;
5827 }
5828
5829 if (result->m_len < sizeof(struct sadb_msg)) {
5830 result = m_pullup(result, sizeof(struct sadb_msg));
5831 if (result == NULL) {
5832 error = ENOBUFS;
5833 goto fail;
5834 }
5835 }
5836
5837 result->m_pkthdr.len = 0;
5838 for (m = result; m; m = m->m_next)
5839 result->m_pkthdr.len += m->m_len;
5840
5841 mtod(result, struct sadb_msg *)->sadb_msg_len =
5842 PFKEY_UNIT64(result->m_pkthdr.len);
5843
5844 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
5845
5846 fail:
5847 if (result)
5848 m_freem(result);
5849 return error;
5850 }
5851
5852 #ifndef IPSEC_NONBLOCK_ACQUIRE
5853 static struct secacq *
5854 key_newacq(struct secasindex *saidx)
5855 {
5856 struct secacq *newacq;
5857 struct timeval tv;
5858
5859 /* get new entry */
5860 KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
5861 if (newacq == NULL) {
5862 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
5863 return NULL;
5864 }
5865 bzero(newacq, sizeof(*newacq));
5866
5867 /* copy secindex */
5868 bcopy(saidx, &newacq->saidx, sizeof(newacq->saidx));
5869 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
5870 microtime(&tv);
5871 newacq->created = tv.tv_sec;
5872 newacq->count = 0;
5873
5874 return newacq;
5875 }
5876
5877 static struct secacq *
5878 key_getacq(struct secasindex *saidx)
5879 {
5880 struct secacq *acq;
5881
5882 LIST_FOREACH(acq, &acqtree, chain) {
5883 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
5884 return acq;
5885 }
5886
5887 return NULL;
5888 }
5889
5890 static struct secacq *
5891 key_getacqbyseq(u_int32_t seq)
5892 {
5893 struct secacq *acq;
5894
5895 LIST_FOREACH(acq, &acqtree, chain) {
5896 if (acq->seq == seq)
5897 return acq;
5898 }
5899
5900 return NULL;
5901 }
5902 #endif
5903
5904 static struct secspacq *
5905 key_newspacq(struct secpolicyindex *spidx)
5906 {
5907 struct secspacq *acq;
5908 struct timeval tv;
5909
5910 /* get new entry */
5911 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq));
5912 if (acq == NULL) {
5913 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
5914 return NULL;
5915 }
5916 bzero(acq, sizeof(*acq));
5917
5918 /* copy secindex */
5919 bcopy(spidx, &acq->spidx, sizeof(acq->spidx));
5920 microtime(&tv);
5921 acq->created = tv.tv_sec;
5922 acq->count = 0;
5923
5924 return acq;
5925 }
5926
5927 static struct secspacq *
5928 key_getspacq(struct secpolicyindex *spidx)
5929 {
5930 struct secspacq *acq;
5931
5932 LIST_FOREACH(acq, &spacqtree, chain) {
5933 if (key_cmpspidx_exactly(spidx, &acq->spidx))
5934 return acq;
5935 }
5936
5937 return NULL;
5938 }
5939
5940 /*
5941 * SADB_ACQUIRE processing,
5942 * in first situation, is receiving
5943 * <base>
5944 * from the ikmpd, and clear sequence of its secasvar entry.
5945 *
5946 * In second situation, is receiving
5947 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5948 * from a user land process, and return
5949 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
5950 * to the socket.
5951 *
5952 * m will always be freed.
5953 */
5954 static int
5955 key_acquire2(struct socket *so, struct mbuf *m,
5956 const struct sadb_msghdr *mhp)
5957 {
5958 struct sadb_address *src0, *dst0;
5959 struct secasindex saidx;
5960 struct secashead *sah;
5961 u_int16_t proto;
5962 int error;
5963
5964 /* sanity check */
5965 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5966 panic("key_acquire2: NULL pointer is passed.\n");
5967
5968 /*
5969 * Error message from KMd.
5970 * We assume that if error was occured in IKEd, the length of PFKEY
5971 * message is equal to the size of sadb_msg structure.
5972 * We do not raise error even if error occured in this function.
5973 */
5974 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
5975 #ifndef IPSEC_NONBLOCK_ACQUIRE
5976 struct secacq *acq;
5977 struct timeval tv;
5978
5979 /* check sequence number */
5980 if (mhp->msg->sadb_msg_seq == 0) {
5981 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
5982 m_freem(m);
5983 return 0;
5984 }
5985
5986 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
5987 /*
5988 * the specified larval SA is already gone, or we got
5989 * a bogus sequence number. we can silently ignore it.
5990 */
5991 m_freem(m);
5992 return 0;
5993 }
5994
5995 /* reset acq counter in order to deletion by timehander. */
5996 microtime(&tv);
5997 acq->created = tv.tv_sec;
5998 acq->count = 0;
5999 #endif
6000 m_freem(m);
6001 return 0;
6002 }
6003
6004 /*
6005 * This message is from user land.
6006 */
6007
6008 /* map satype to proto */
6009 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6010 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
6011 return key_senderror(so, m, EINVAL);
6012 }
6013
6014 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6015 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6016 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
6017 /* error */
6018 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6019 return key_senderror(so, m, EINVAL);
6020 }
6021 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6022 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
6023 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
6024 /* error */
6025 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6026 return key_senderror(so, m, EINVAL);
6027 }
6028
6029 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6030 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6031
6032 /* XXX boundary check against sa_len */
6033 KEY_SETSECASIDX(proto, IPSEC_MODE_ANY, 0, src0 + 1, dst0 + 1, &saidx);
6034
6035 /* get a SA index */
6036 LIST_FOREACH(sah, &sahtree, chain) {
6037 if (sah->state == SADB_SASTATE_DEAD)
6038 continue;
6039 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6040 break;
6041 }
6042 if (sah != NULL) {
6043 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
6044 return key_senderror(so, m, EEXIST);
6045 }
6046
6047 error = key_acquire(&saidx, NULL);
6048 if (error != 0) {
6049 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
6050 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
6051 return key_senderror(so, m, error);
6052 }
6053
6054 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6055 }
6056
6057 /*
6058 * SADB_REGISTER processing.
6059 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6060 * receive
6061 * <base>
6062 * from the ikmpd, and register a socket to send PF_KEY messages,
6063 * and send
6064 * <base, supported>
6065 * to KMD by PF_KEY.
6066 * If socket is detached, must free from regnode.
6067 *
6068 * m will always be freed.
6069 */
6070 static int
6071 key_register(struct socket *so, struct mbuf *m,
6072 const struct sadb_msghdr *mhp)
6073 {
6074 struct secreg *reg, *newreg = 0;
6075
6076 /* sanity check */
6077 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6078 panic("key_register: NULL pointer is passed.\n");
6079
6080 /* check for invalid register message */
6081 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0]))
6082 return key_senderror(so, m, EINVAL);
6083
6084 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6085 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6086 goto setmsg;
6087
6088 /* check whether existing or not */
6089 LIST_FOREACH(reg, &regtree[mhp->msg->sadb_msg_satype], chain) {
6090 if (reg->so == so) {
6091 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
6092 return key_senderror(so, m, EEXIST);
6093 }
6094 }
6095
6096 /* create regnode */
6097 KMALLOC(newreg, struct secreg *, sizeof(*newreg));
6098 if (newreg == NULL) {
6099 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
6100 return key_senderror(so, m, ENOBUFS);
6101 }
6102 bzero((caddr_t)newreg, sizeof(*newreg));
6103
6104 newreg->so = so;
6105 ((struct keycb *)sotorawcb(so))->kp_registered++;
6106
6107 /* add regnode to regtree. */
6108 LIST_INSERT_HEAD(&regtree[mhp->msg->sadb_msg_satype], newreg, chain);
6109
6110 setmsg:
6111 {
6112 struct mbuf *n;
6113 struct sadb_msg *newmsg;
6114 struct sadb_supported *sup;
6115 u_int len, alen, elen;
6116 int off;
6117 int i;
6118 struct sadb_alg *alg;
6119
6120 /* create new sadb_msg to reply. */
6121 alen = 0;
6122 for (i = 1; i <= SADB_AALG_MAX; i++) {
6123 if (ah_algorithm_lookup(i))
6124 alen += sizeof(struct sadb_alg);
6125 }
6126 if (alen)
6127 alen += sizeof(struct sadb_supported);
6128 elen = 0;
6129 #ifdef IPSEC_ESP
6130 for (i = 1; i <= SADB_EALG_MAX; i++) {
6131 if (esp_algorithm_lookup(i))
6132 elen += sizeof(struct sadb_alg);
6133 }
6134 if (elen)
6135 elen += sizeof(struct sadb_supported);
6136 #endif
6137
6138 len = sizeof(struct sadb_msg) + alen + elen;
6139
6140 if (len > MCLBYTES)
6141 return key_senderror(so, m, ENOBUFS);
6142
6143 MGETHDR(n, MB_DONTWAIT, MT_DATA);
6144 if (len > MHLEN) {
6145 MCLGET(n, MB_DONTWAIT);
6146 if ((n->m_flags & M_EXT) == 0) {
6147 m_freem(n);
6148 n = NULL;
6149 }
6150 }
6151 if (!n)
6152 return key_senderror(so, m, ENOBUFS);
6153
6154 n->m_pkthdr.len = n->m_len = len;
6155 n->m_next = NULL;
6156 off = 0;
6157
6158 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
6159 newmsg = mtod(n, struct sadb_msg *);
6160 newmsg->sadb_msg_errno = 0;
6161 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6162 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6163
6164 /* for authentication algorithm */
6165 if (alen) {
6166 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6167 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6168 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6169 off += PFKEY_ALIGN8(sizeof(*sup));
6170
6171 for (i = 1; i <= SADB_AALG_MAX; i++) {
6172 const struct ah_algorithm *aalgo;
6173
6174 aalgo = ah_algorithm_lookup(i);
6175 if (!aalgo)
6176 continue;
6177 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6178 alg->sadb_alg_id = i;
6179 alg->sadb_alg_ivlen = 0;
6180 alg->sadb_alg_minbits = aalgo->keymin;
6181 alg->sadb_alg_maxbits = aalgo->keymax;
6182 off += PFKEY_ALIGN8(sizeof(*alg));
6183 }
6184 }
6185
6186 #ifdef IPSEC_ESP
6187 /* for encryption algorithm */
6188 if (elen) {
6189 sup = (struct sadb_supported *)(mtod(n, caddr_t) + off);
6190 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6191 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6192 off += PFKEY_ALIGN8(sizeof(*sup));
6193
6194 for (i = 1; i <= SADB_EALG_MAX; i++) {
6195 const struct esp_algorithm *ealgo;
6196
6197 ealgo = esp_algorithm_lookup(i);
6198 if (!ealgo)
6199 continue;
6200 alg = (struct sadb_alg *)(mtod(n, caddr_t) + off);
6201 alg->sadb_alg_id = i;
6202 if (ealgo && ealgo->ivlen) {
6203 /*
6204 * give NULL to get the value preferred by
6205 * algorithm XXX SADB_X_EXT_DERIV ?
6206 */
6207 alg->sadb_alg_ivlen =
6208 (*ealgo->ivlen)(ealgo, NULL);
6209 } else
6210 alg->sadb_alg_ivlen = 0;
6211 alg->sadb_alg_minbits = ealgo->keymin;
6212 alg->sadb_alg_maxbits = ealgo->keymax;
6213 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6214 }
6215 }
6216 #endif
6217
6218 #ifdef DIGAGNOSTIC
6219 if (off != len)
6220 panic("length assumption failed in key_register");
6221 #endif
6222
6223 m_freem(m);
6224 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6225 }
6226 }
6227
6228 /*
6229 * free secreg entry registered.
6230 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6231 */
6232 void
6233 key_freereg(struct socket *so)
6234 {
6235 struct secreg *reg;
6236 int i;
6237
6238 /* sanity check */
6239 if (so == NULL)
6240 panic("key_freereg: NULL pointer is passed.\n");
6241
6242 /*
6243 * check whether existing or not.
6244 * check all type of SA, because there is a potential that
6245 * one socket is registered to multiple type of SA.
6246 */
6247 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6248 LIST_FOREACH(reg, &regtree[i], chain) {
6249 if (reg->so == so
6250 && __LIST_CHAINED(reg)) {
6251 LIST_REMOVE(reg, chain);
6252 KFREE(reg);
6253 break;
6254 }
6255 }
6256 }
6257
6258 return;
6259 }
6260
6261 /*
6262 * SADB_EXPIRE processing
6263 * send
6264 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6265 * to KMD by PF_KEY.
6266 * NOTE: We send only soft lifetime extension.
6267 *
6268 * OUT: 0 : succeed
6269 * others : error number
6270 */
6271 static int
6272 key_expire(struct secasvar *sav)
6273 {
6274 int satype;
6275 struct mbuf *result = NULL, *m;
6276 int len;
6277 int error = -1;
6278 struct sadb_lifetime *lt;
6279
6280 /* XXX: Why do we lock ? */
6281 crit_enter();
6282
6283 /* sanity check */
6284 if (sav == NULL)
6285 panic("key_expire: NULL pointer is passed.\n");
6286 if (sav->sah == NULL)
6287 panic("key_expire: Why was SA index in SA NULL.\n");
6288 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
6289 panic("key_expire: invalid proto is passed.\n");
6290
6291 /* set msg header */
6292 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6293 if (!m) {
6294 error = ENOBUFS;
6295 goto fail;
6296 }
6297 result = m;
6298
6299 /* create SA extension */
6300 m = key_setsadbsa(sav);
6301 if (!m) {
6302 error = ENOBUFS;
6303 goto fail;
6304 }
6305 m_cat(result, m);
6306
6307 /* create SA extension */
6308 m = key_setsadbxsa2(sav->sah->saidx.mode,
6309 sav->replay ? sav->replay->count : 0,
6310 sav->sah->saidx.reqid);
6311 if (!m) {
6312 error = ENOBUFS;
6313 goto fail;
6314 }
6315 m_cat(result, m);
6316
6317 /* create lifetime extension (current and soft) */
6318 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6319 m = key_alloc_mbuf(len);
6320 if (!m || m->m_next) { /*XXX*/
6321 if (m)
6322 m_freem(m);
6323 error = ENOBUFS;
6324 goto fail;
6325 }
6326 bzero(mtod(m, caddr_t), len);
6327 lt = mtod(m, struct sadb_lifetime *);
6328 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6329 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6330 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
6331 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
6332 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
6333 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
6334 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
6335 bcopy(sav->lft_s, lt, sizeof(*lt));
6336 m_cat(result, m);
6337
6338 /* set sadb_address for source */
6339 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6340 (struct sockaddr *)&sav->sah->saidx.src,
6341 FULLMASK, IPSEC_ULPROTO_ANY);
6342 if (!m) {
6343 error = ENOBUFS;
6344 goto fail;
6345 }
6346 m_cat(result, m);
6347
6348 /* set sadb_address for destination */
6349 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6350 (struct sockaddr *)&sav->sah->saidx.dst,
6351 FULLMASK, IPSEC_ULPROTO_ANY);
6352 if (!m) {
6353 error = ENOBUFS;
6354 goto fail;
6355 }
6356 m_cat(result, m);
6357
6358 if ((result->m_flags & M_PKTHDR) == 0) {
6359 error = EINVAL;
6360 goto fail;
6361 }
6362
6363 if (result->m_len < sizeof(struct sadb_msg)) {
6364 result = m_pullup(result, sizeof(struct sadb_msg));
6365 if (result == NULL) {
6366 error = ENOBUFS;
6367 goto fail;
6368 }
6369 }
6370
6371 result->m_pkthdr.len = 0;
6372 for (m = result; m; m = m->m_next)
6373 result->m_pkthdr.len += m->m_len;
6374
6375 mtod(result, struct sadb_msg *)->sadb_msg_len =
6376 PFKEY_UNIT64(result->m_pkthdr.len);
6377
6378 crit_exit();
6379 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6380
6381 fail:
6382 if (result)
6383 m_freem(result);
6384 crit_exit();
6385 return error;
6386 }
6387
6388 /*
6389 * SADB_FLUSH processing
6390 * receive
6391 * <base>
6392 * from the ikmpd, and free all entries in secastree.
6393 * and send,
6394 * <base>
6395 * to the ikmpd.
6396 * NOTE: to do is only marking SADB_SASTATE_DEAD.
6397 *
6398 * m will always be freed.
6399 */
6400 static int
6401 key_flush(struct socket *so, struct mbuf *m,
6402 const struct sadb_msghdr *mhp)
6403 {
6404 struct sadb_msg *newmsg;
6405 struct secashead *sah, *nextsah;
6406 struct secasvar *sav, *nextsav;
6407 u_int16_t proto;
6408 u_int8_t state;
6409 u_int stateidx;
6410
6411 /* sanity check */
6412 if (so == NULL || mhp == NULL || mhp->msg == NULL)
6413 panic("key_flush: NULL pointer is passed.\n");
6414
6415 /* map satype to proto */
6416 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6417 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
6418 return key_senderror(so, m, EINVAL);
6419 }
6420
6421 /* no SATYPE specified, i.e. flushing all SA. */
6422 for (sah = LIST_FIRST(&sahtree);
6423 sah != NULL;
6424 sah = nextsah) {
6425 nextsah = LIST_NEXT(sah, chain);
6426
6427 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6428 && proto != sah->saidx.proto)
6429 continue;
6430
6431 for (stateidx = 0;
6432 stateidx < _ARRAYLEN(saorder_state_alive);
6433 stateidx++) {
6434 state = saorder_state_any[stateidx];
6435 for (sav = LIST_FIRST(&sah->savtree[state]);
6436 sav != NULL;
6437 sav = nextsav) {
6438
6439 nextsav = LIST_NEXT(sav, chain);
6440
6441 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6442 key_freesav(sav);
6443 }
6444 }
6445
6446 sah->state = SADB_SASTATE_DEAD;
6447 }
6448
6449 if (m->m_len < sizeof(struct sadb_msg) ||
6450 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
6451 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
6452 return key_senderror(so, m, ENOBUFS);
6453 }
6454
6455 if (m->m_next)
6456 m_freem(m->m_next);
6457 m->m_next = NULL;
6458 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
6459 newmsg = mtod(m, struct sadb_msg *);
6460 newmsg->sadb_msg_errno = 0;
6461 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
6462
6463 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6464 }
6465
6466 /*
6467 * SADB_DUMP processing
6468 * dump all entries including status of DEAD in SAD.
6469 * receive
6470 * <base>
6471 * from the ikmpd, and dump all secasvar leaves
6472 * and send,
6473 * <base> .....
6474 * to the ikmpd.
6475 *
6476 * m will always be freed.
6477 */
6478 static int
6479 key_dump(struct socket *so, struct mbuf *m,
6480 const struct sadb_msghdr *mhp)
6481 {
6482 struct secashead *sah;
6483 struct secasvar *sav;
6484 u_int16_t proto;
6485 u_int stateidx;
6486 u_int8_t satype;
6487 u_int8_t state;
6488 int cnt;
6489 struct sadb_msg *newmsg;
6490 struct mbuf *n;
6491
6492 /* sanity check */
6493 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6494 panic("key_dump: NULL pointer is passed.\n");
6495
6496 /* map satype to proto */
6497 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6498 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
6499 return key_senderror(so, m, EINVAL);
6500 }
6501
6502 /* count sav entries to be sent to the userland. */
6503 cnt = 0;
6504 LIST_FOREACH(sah, &sahtree, chain) {
6505 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6506 && proto != sah->saidx.proto)
6507 continue;
6508
6509 for (stateidx = 0;
6510 stateidx < _ARRAYLEN(saorder_state_any);
6511 stateidx++) {
6512 state = saorder_state_any[stateidx];
6513 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6514 cnt++;
6515 }
6516 }
6517 }
6518
6519 if (cnt == 0)
6520 return key_senderror(so, m, ENOENT);
6521
6522 /* send this to the userland, one at a time. */
6523 newmsg = NULL;
6524 LIST_FOREACH(sah, &sahtree, chain) {
6525 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6526 && proto != sah->saidx.proto)
6527 continue;
6528
6529 /* map proto to satype */
6530 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
6531 ipseclog((LOG_DEBUG, "key_dump: there was invalid proto in SAD.\n"));
6532 return key_senderror(so, m, EINVAL);
6533 }
6534
6535 for (stateidx = 0;
6536 stateidx < _ARRAYLEN(saorder_state_any);
6537 stateidx++) {
6538 state = saorder_state_any[stateidx];
6539 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6540 n = key_setdumpsa(sav, SADB_DUMP, satype,
6541 --cnt, mhp->msg->sadb_msg_pid);
6542 if (!n)
6543 return key_senderror(so, m, ENOBUFS);
6544
6545 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
6546 }
6547 }
6548 }
6549
6550 m_freem(m);
6551 return 0;
6552 }
6553
6554 /*
6555 * SADB_X_PROMISC processing
6556 *
6557 * m will always be freed.
6558 */
6559 static int
6560 key_promisc(struct socket *so, struct mbuf *m,
6561 const struct sadb_msghdr *mhp)
6562 {
6563 int olen;
6564
6565 /* sanity check */
6566 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6567 panic("key_promisc: NULL pointer is passed.\n");
6568
6569 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6570
6571 if (olen < sizeof(struct sadb_msg)) {
6572 #if 1
6573 return key_senderror(so, m, EINVAL);
6574 #else
6575 m_freem(m);
6576 return 0;
6577 #endif
6578 } else if (olen == sizeof(struct sadb_msg)) {
6579 /* enable/disable promisc mode */
6580 struct keycb *kp;
6581
6582 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
6583 return key_senderror(so, m, EINVAL);
6584 mhp->msg->sadb_msg_errno = 0;
6585 switch (mhp->msg->sadb_msg_satype) {
6586 case 0:
6587 case 1:
6588 kp->kp_promisc = mhp->msg->sadb_msg_satype;
6589 break;
6590 default:
6591 return key_senderror(so, m, EINVAL);
6592 }
6593
6594 /* send the original message back to everyone */
6595 mhp->msg->sadb_msg_errno = 0;
6596 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6597 } else {
6598 /* send packet as is */
6599
6600 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
6601
6602 /* TODO: if sadb_msg_seq is specified, send to specific pid */
6603 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6604 }
6605 }
6606
6607 static int (*key_typesw[]) (struct socket *, struct mbuf *,
6608 const struct sadb_msghdr *) = {
6609 NULL, /* SADB_RESERVED */
6610 key_getspi, /* SADB_GETSPI */
6611 key_update, /* SADB_UPDATE */
6612 key_add, /* SADB_ADD */
6613 key_delete, /* SADB_DELETE */
6614 key_get, /* SADB_GET */
6615 key_acquire2, /* SADB_ACQUIRE */
6616 key_register, /* SADB_REGISTER */
6617 NULL, /* SADB_EXPIRE */
6618 key_flush, /* SADB_FLUSH */
6619 key_dump, /* SADB_DUMP */
6620 key_promisc, /* SADB_X_PROMISC */
6621 NULL, /* SADB_X_PCHANGE */
6622 key_spdadd, /* SADB_X_SPDUPDATE */
6623 key_spdadd, /* SADB_X_SPDADD */
6624 key_spddelete, /* SADB_X_SPDDELETE */
6625 key_spdget, /* SADB_X_SPDGET */
6626 NULL, /* SADB_X_SPDACQUIRE */
6627 key_spddump, /* SADB_X_SPDDUMP */
6628 key_spdflush, /* SADB_X_SPDFLUSH */
6629 key_spdadd, /* SADB_X_SPDSETIDX */
6630 NULL, /* SADB_X_SPDEXPIRE */
6631 key_spddelete2, /* SADB_X_SPDDELETE2 */
6632 };
6633
6634 /*
6635 * parse sadb_msg buffer to process PFKEYv2,
6636 * and create a data to response if needed.
6637 * I think to be dealed with mbuf directly.
6638 * IN:
6639 * msgp : pointer to pointer to a received buffer pulluped.
6640 * This is rewrited to response.
6641 * so : pointer to socket.
6642 * OUT:
6643 * length for buffer to send to user process.
6644 */
6645 int
6646 key_parse(struct mbuf *m, struct socket *so)
6647 {
6648 struct sadb_msg *msg;
6649 struct sadb_msghdr mh;
6650 u_int orglen;
6651 int error;
6652 int target;
6653
6654 /* sanity check */
6655 if (m == NULL || so == NULL)
6656 panic("key_parse: NULL pointer is passed.\n");
6657
6658 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
6659 KEYDEBUG(KEYDEBUG_KEY_DUMP,
6660 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
6661 kdebug_sadb(msg));
6662 #endif
6663
6664 if (m->m_len < sizeof(struct sadb_msg)) {
6665 m = m_pullup(m, sizeof(struct sadb_msg));
6666 if (!m)
6667 return ENOBUFS;
6668 }
6669 msg = mtod(m, struct sadb_msg *);
6670 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
6671 target = KEY_SENDUP_ONE;
6672
6673 if ((m->m_flags & M_PKTHDR) == 0 ||
6674 m->m_pkthdr.len != m->m_pkthdr.len) {
6675 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
6676 pfkeystat.out_invlen++;
6677 error = EINVAL;
6678 goto senderror;
6679 }
6680
6681 if (msg->sadb_msg_version != PF_KEY_V2) {
6682 ipseclog((LOG_DEBUG,
6683 "key_parse: PF_KEY version %u is mismatched.\n",
6684 msg->sadb_msg_version));
6685 pfkeystat.out_invver++;
6686 error = EINVAL;
6687 goto senderror;
6688 }
6689
6690 if (msg->sadb_msg_type > SADB_MAX) {
6691 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6692 msg->sadb_msg_type));
6693 pfkeystat.out_invmsgtype++;
6694 error = EINVAL;
6695 goto senderror;
6696 }
6697
6698 /* for old-fashioned code - should be nuked */
6699 if (m->m_pkthdr.len > MCLBYTES) {
6700 m_freem(m);
6701 return ENOBUFS;
6702 }
6703 if (m->m_next) {
6704 struct mbuf *n;
6705
6706 MGETHDR(n, MB_DONTWAIT, MT_DATA);
6707 if (n && m->m_pkthdr.len > MHLEN) {
6708 MCLGET(n, MB_DONTWAIT);
6709 if ((n->m_flags & M_EXT) == 0) {
6710 m_free(n);
6711 n = NULL;
6712 }
6713 }
6714 if (!n) {
6715 m_freem(m);
6716 return ENOBUFS;
6717 }
6718 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, caddr_t));
6719 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
6720 n->m_next = NULL;
6721 m_freem(m);
6722 m = n;
6723 }
6724
6725 /* align the mbuf chain so that extensions are in contiguous region. */
6726 error = key_align(m, &mh);
6727 if (error)
6728 return error;
6729
6730 if (m->m_next) { /*XXX*/
6731 m_freem(m);
6732 return ENOBUFS;
6733 }
6734
6735 msg = mh.msg;
6736
6737 /* check SA type */
6738 switch (msg->sadb_msg_satype) {
6739 case SADB_SATYPE_UNSPEC:
6740 switch (msg->sadb_msg_type) {
6741 case SADB_GETSPI:
6742 case SADB_UPDATE:
6743 case SADB_ADD:
6744 case SADB_DELETE:
6745 case SADB_GET:
6746 case SADB_ACQUIRE:
6747 case SADB_EXPIRE:
6748 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
6749 "when msg type=%u.\n", msg->sadb_msg_type));
6750 pfkeystat.out_invsatype++;
6751 error = EINVAL;
6752 goto senderror;
6753 }
6754 break;
6755 case SADB_SATYPE_AH:
6756 case SADB_SATYPE_ESP:
6757 case SADB_X_SATYPE_IPCOMP:
6758 switch (msg->sadb_msg_type) {
6759 case SADB_X_SPDADD:
6760 case SADB_X_SPDDELETE:
6761 case SADB_X_SPDGET:
6762 case SADB_X_SPDDUMP:
6763 case SADB_X_SPDFLUSH:
6764 case SADB_X_SPDSETIDX:
6765 case SADB_X_SPDUPDATE:
6766 case SADB_X_SPDDELETE2:
6767 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
6768 msg->sadb_msg_type));
6769 pfkeystat.out_invsatype++;
6770 error = EINVAL;
6771 goto senderror;
6772 }
6773 break;
6774 case SADB_SATYPE_RSVP:
6775 case SADB_SATYPE_OSPFV2:
6776 case SADB_SATYPE_RIPV2:
6777 case SADB_SATYPE_MIP:
6778 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
6779 msg->sadb_msg_satype));
6780 pfkeystat.out_invsatype++;
6781 error = EOPNOTSUPP;
6782 goto senderror;
6783 case 1: /* XXX: What does it do? */
6784 if (msg->sadb_msg_type == SADB_X_PROMISC)
6785 break;
6786 /*FALLTHROUGH*/
6787 default:
6788 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
6789 msg->sadb_msg_satype));
6790 pfkeystat.out_invsatype++;
6791 error = EINVAL;
6792 goto senderror;
6793 }
6794
6795 /* check field of upper layer protocol and address family */
6796 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
6797 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
6798 struct sadb_address *src0, *dst0;
6799 u_int plen;
6800
6801 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
6802 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
6803
6804 /* check upper layer protocol */
6805 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
6806 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
6807 pfkeystat.out_invaddr++;
6808 error = EINVAL;
6809 goto senderror;
6810 }
6811
6812 /* check family */
6813 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
6814 PFKEY_ADDR_SADDR(dst0)->sa_family) {
6815 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
6816 pfkeystat.out_invaddr++;
6817 error = EINVAL;
6818 goto senderror;
6819 }
6820 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6821 PFKEY_ADDR_SADDR(dst0)->sa_len) {
6822 ipseclog((LOG_DEBUG,
6823 "key_parse: address struct size mismatched.\n"));
6824 pfkeystat.out_invaddr++;
6825 error = EINVAL;
6826 goto senderror;
6827 }
6828
6829 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6830 case AF_INET:
6831 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6832 sizeof(struct sockaddr_in)) {
6833 pfkeystat.out_invaddr++;
6834 error = EINVAL;
6835 goto senderror;
6836 }
6837 break;
6838 case AF_INET6:
6839 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
6840 sizeof(struct sockaddr_in6)) {
6841 pfkeystat.out_invaddr++;
6842 error = EINVAL;
6843 goto senderror;
6844 }
6845 break;
6846 default:
6847 ipseclog((LOG_DEBUG,
6848 "key_parse: unsupported address family.\n"));
6849 pfkeystat.out_invaddr++;
6850 error = EAFNOSUPPORT;
6851 goto senderror;
6852 }
6853
6854 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
6855 case AF_INET:
6856 plen = sizeof(struct in_addr) << 3;
6857 break;
6858 case AF_INET6:
6859 plen = sizeof(struct in6_addr) << 3;
6860 break;
6861 default:
6862 plen = 0; /*fool gcc*/
6863 break;
6864 }
6865
6866 /* check max prefix length */
6867 if (src0->sadb_address_prefixlen > plen ||
6868 dst0->sadb_address_prefixlen > plen) {
6869 ipseclog((LOG_DEBUG,
6870 "key_parse: illegal prefixlen.\n"));
6871 pfkeystat.out_invaddr++;
6872 error = EINVAL;
6873 goto senderror;
6874 }
6875
6876 /*
6877 * prefixlen == 0 is valid because there can be a case when
6878 * all addresses are matched.
6879 */
6880 }
6881
6882 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
6883 key_typesw[msg->sadb_msg_type] == NULL) {
6884 pfkeystat.out_invmsgtype++;
6885 error = EINVAL;
6886 goto senderror;
6887 }
6888
6889 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
6890
6891 senderror:
6892 msg->sadb_msg_errno = error;
6893 return key_sendup_mbuf(so, m, target);
6894 }
6895
6896 static int
6897 key_senderror(struct socket *so, struct mbuf *m, int code)
6898 {
6899 struct sadb_msg *msg;
6900
6901 if (m->m_len < sizeof(struct sadb_msg))
6902 panic("invalid mbuf passed to key_senderror");
6903
6904 msg = mtod(m, struct sadb_msg *);
6905 msg->sadb_msg_errno = code;
6906 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
6907 }
6908
6909 /*
6910 * set the pointer to each header into message buffer.
6911 * m will be freed on error.
6912 * XXX larger-than-MCLBYTES extension?
6913 */
6914 static int
6915 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
6916 {
6917 struct mbuf *n;
6918 struct sadb_ext *ext;
6919 size_t off, end;
6920 int extlen;
6921 int toff;
6922
6923 /* sanity check */
6924 if (m == NULL || mhp == NULL)
6925 panic("key_align: NULL pointer is passed.\n");
6926 if (m->m_len < sizeof(struct sadb_msg))
6927 panic("invalid mbuf passed to key_align");
6928
6929 /* initialize */
6930 bzero(mhp, sizeof(*mhp));
6931
6932 mhp->msg = mtod(m, struct sadb_msg *);
6933 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
6934
6935 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
6936 extlen = end; /*just in case extlen is not updated*/
6937 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
6938 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
6939 if (!n) {
6940 /* m is already freed */
6941 return ENOBUFS;
6942 }
6943 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
6944
6945 /* set pointer */
6946 switch (ext->sadb_ext_type) {
6947 case SADB_EXT_SA:
6948 case SADB_EXT_ADDRESS_SRC:
6949 case SADB_EXT_ADDRESS_DST:
6950 case SADB_EXT_ADDRESS_PROXY:
6951 case SADB_EXT_LIFETIME_CURRENT:
6952 case SADB_EXT_LIFETIME_HARD:
6953 case SADB_EXT_LIFETIME_SOFT:
6954 case SADB_EXT_KEY_AUTH:
6955 case SADB_EXT_KEY_ENCRYPT:
6956 case SADB_EXT_IDENTITY_SRC:
6957 case SADB_EXT_IDENTITY_DST:
6958 case SADB_EXT_SENSITIVITY:
6959 case SADB_EXT_PROPOSAL:
6960 case SADB_EXT_SUPPORTED_AUTH:
6961 case SADB_EXT_SUPPORTED_ENCRYPT:
6962 case SADB_EXT_SPIRANGE:
6963 case SADB_X_EXT_POLICY:
6964 case SADB_X_EXT_SA2:
6965 /* duplicate check */
6966 /*
6967 * XXX Are there duplication payloads of either
6968 * KEY_AUTH or KEY_ENCRYPT ?
6969 */
6970 if (mhp->ext[ext->sadb_ext_type] != NULL) {
6971 ipseclog((LOG_DEBUG,
6972 "key_align: duplicate ext_type %u "
6973 "is passed.\n", ext->sadb_ext_type));
6974 m_freem(m);
6975 pfkeystat.out_dupext++;
6976 return EINVAL;
6977 }
6978 break;
6979 default:
6980 ipseclog((LOG_DEBUG,
6981 "key_align: invalid ext_type %u is passed.\n",
6982 ext->sadb_ext_type));
6983 m_freem(m);
6984 pfkeystat.out_invexttype++;
6985 return EINVAL;
6986 }
6987
6988 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
6989
6990 if (key_validate_ext(ext, extlen)) {
6991 m_freem(m);
6992 pfkeystat.out_invlen++;
6993 return EINVAL;
6994 }
6995
6996 n = m_pulldown(m, off, extlen, &toff);
6997 if (!n) {
6998 /* m is already freed */
6999 return ENOBUFS;
7000 }
7001 ext = (struct sadb_ext *)(mtod(n, caddr_t) + toff);
7002
7003 mhp->ext[ext->sadb_ext_type] = ext;
7004 mhp->extoff[ext->sadb_ext_type] = off;
7005 mhp->extlen[ext->sadb_ext_type] = extlen;
7006 }
7007
7008 if (off != end) {
7009 m_freem(m);
7010 pfkeystat.out_invlen++;
7011 return EINVAL;
7012 }
7013
7014 return 0;
7015 }
7016
7017 static int
7018 key_validate_ext(const struct sadb_ext *ext, int len)
7019 {
7020 const struct sockaddr *sa;
7021 enum { NONE, ADDR } checktype = NONE;
7022 int baselen = 0;
7023 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
7024
7025 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
7026 return EINVAL;
7027
7028 /* if it does not match minimum/maximum length, bail */
7029 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
7030 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
7031 return EINVAL;
7032 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
7033 return EINVAL;
7034 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
7035 return EINVAL;
7036
7037 /* more checks based on sadb_ext_type XXX need more */
7038 switch (ext->sadb_ext_type) {
7039 case SADB_EXT_ADDRESS_SRC:
7040 case SADB_EXT_ADDRESS_DST:
7041 case SADB_EXT_ADDRESS_PROXY:
7042 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7043 checktype = ADDR;
7044 break;
7045 case SADB_EXT_IDENTITY_SRC:
7046 case SADB_EXT_IDENTITY_DST:
7047 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7048 SADB_X_IDENTTYPE_ADDR) {
7049 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7050 checktype = ADDR;
7051 } else
7052 checktype = NONE;
7053 break;
7054 default:
7055 checktype = NONE;
7056 break;
7057 }
7058
7059 switch (checktype) {
7060 case NONE:
7061 break;
7062 case ADDR:
7063 sa = (const struct sockaddr *)((c_caddr_t)ext + baselen);
7064 if (len < baselen + sal)
7065 return EINVAL;
7066 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7067 return EINVAL;
7068 break;
7069 }
7070
7071 return 0;
7072 }
7073
7074 void
7075 key_init(void)
7076 {
7077 int i;
7078
7079 bzero((caddr_t)&key_cb, sizeof(key_cb));
7080
7081 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7082 LIST_INIT(&sptree[i]);
7083 }
7084
7085 LIST_INIT(&sahtree);
7086
7087 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7088 LIST_INIT(&regtree[i]);
7089 }
7090
7091 #ifndef IPSEC_NONBLOCK_ACQUIRE
7092 LIST_INIT(&acqtree);
7093 #endif
7094 LIST_INIT(&spacqtree);
7095
7096 /* system default */
7097 #ifdef INET
7098 ip4_def_policy.policy = IPSEC_POLICY_NONE;
7099 ip4_def_policy.refcnt++; /*never reclaim this*/
7100 #endif
7101 #ifdef INET6
7102 ip6_def_policy.policy = IPSEC_POLICY_NONE;
7103 ip6_def_policy.refcnt++; /*never reclaim this*/
7104 #endif
7105
7106 #ifndef IPSEC_DEBUG2
7107 callout_init(&key_timehandler_ch);
7108 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
7109 #endif /*IPSEC_DEBUG2*/
7110
7111 /* initialize key statistics */
7112 keystat.getspi_count = 1;
7113
7114 kprintf("IPsec: Initialized Security Association Processing.\n");
7115 kprintf("XXX 2\n");
7116
7117 return;
7118 }
7119
7120 /*
7121 * XXX: maybe This function is called after INBOUND IPsec processing.
7122 *
7123 * Special check for tunnel-mode packets.
7124 * We must make some checks for consistency between inner and outer IP header.
7125 *
7126 * xxx more checks to be provided
7127 */
7128 int
7129 key_checktunnelsanity(struct secasvar *sav, u_int family,
7130 caddr_t src, caddr_t dst)
7131 {
7132 /* sanity check */
7133 if (sav->sah == NULL)
7134 panic("sav->sah == NULL at key_checktunnelsanity");
7135
7136 /* XXX: check inner IP header */
7137
7138 return 1;
7139 }
7140
7141 #if 0
7142 #define hostnamelen strlen(hostname)
7143
7144 /*
7145 * Get FQDN for the host.
7146 * If the administrator configured hostname (by hostname(1)) without
7147 * domain name, returns nothing.
7148 */
7149 static const char *
7150 key_getfqdn(void)
7151 {
7152 int i;
7153 int hasdot;
7154 static char fqdn[MAXHOSTNAMELEN + 1];
7155
7156 if (!hostnamelen)
7157 return NULL;
7158
7159 /* check if it comes with domain name. */
7160 hasdot = 0;
7161 for (i = 0; i < hostnamelen; i++) {
7162 if (hostname[i] == '.')
7163 hasdot++;
7164 }
7165 if (!hasdot)
7166 return NULL;
7167
7168 /* NOTE: hostname may not be NUL-terminated. */
7169 bzero(fqdn, sizeof(fqdn));
7170 bcopy(hostname, fqdn, hostnamelen);
7171 fqdn[hostnamelen] = '\0';
7172 return fqdn;
7173 }
7174
7175 /*
7176 * get username@FQDN for the host/user.
7177 */
7178 static const char *
7179 key_getuserfqdn(void)
7180 {
7181 const char *host;
7182 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
7183 struct proc *p = curproc;
7184 char *q;
7185
7186 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
7187 return NULL;
7188 if (!(host = key_getfqdn()))
7189 return NULL;
7190
7191 /* NOTE: s_login may not be-NUL terminated. */
7192 bzero(userfqdn, sizeof(userfqdn));
7193 bcopy(p->p_pgrp->pg_session->s_login, userfqdn, MAXLOGNAME);
7194 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
7195 q = userfqdn + strlen(userfqdn);
7196 *q++ = '@';
7197 bcopy(host, q, strlen(host));
7198 q += strlen(host);
7199 *q++ = '\0';
7200
7201 return userfqdn;
7202 }
7203 #endif
7204
7205 /* record data transfer on SA, and update timestamps */
7206 void
7207 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
7208 {
7209 if (!sav)
7210 panic("key_sa_recordxfer called with sav == NULL");
7211 if (!m)
7212 panic("key_sa_recordxfer called with m == NULL");
7213 if (!sav->lft_c)
7214 return;
7215
7216 /*
7217 * XXX Currently, there is a difference of bytes size
7218 * between inbound and outbound processing.
7219 */
7220 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
7221 /* to check bytes lifetime is done in key_timehandler(). */
7222
7223 /*
7224 * We use the number of packets as the unit of
7225 * sadb_lifetime_allocations. We increment the variable
7226 * whenever {esp,ah}_{in,out}put is called.
7227 */
7228 sav->lft_c->sadb_lifetime_allocations++;
7229 /* XXX check for expires? */
7230
7231 /*
7232 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
7233 * in seconds. HARD and SOFT lifetime are measured by the time
7234 * difference (again in seconds) from sadb_lifetime_usetime.
7235 *
7236 * usetime
7237 * v expire expire
7238 * -----+-----+--------+---> t
7239 * <--------------> HARD
7240 * <-----> SOFT
7241 */
7242 {
7243 struct timeval tv;
7244 microtime(&tv);
7245 sav->lft_c->sadb_lifetime_usetime = tv.tv_sec;
7246 /* XXX check for expires? */
7247 }
7248
7249 return;
7250 }
7251
7252 /* dumb version */
7253 void
7254 key_sa_routechange(struct sockaddr *dst)
7255 {
7256 struct secashead *sah;
7257 struct route *ro;
7258
7259 LIST_FOREACH(sah, &sahtree, chain) {
7260 ro = &sah->sa_route;
7261 if (ro->ro_rt && dst->sa_len == ro->ro_dst.sa_len
7262 && bcmp(dst, &ro->ro_dst, dst->sa_len) == 0) {
7263 RTFREE(ro->ro_rt);
7264 ro->ro_rt = (struct rtentry *)NULL;
7265 }
7266 }
7267
7268 return;
7269 }
7270
7271 static void
7272 key_sa_chgstate(struct secasvar *sav, u_int8_t state)
7273 {
7274 if (sav == NULL)
7275 panic("key_sa_chgstate called with sav == NULL");
7276
7277 if (sav->state == state)
7278 return;
7279
7280 if (__LIST_CHAINED(sav))
7281 LIST_REMOVE(sav, chain);
7282
7283 sav->state = state;
7284 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7285 }
7286
7287 void
7288 key_sa_stir_iv(struct secasvar *sav)
7289 {
7290
7291 if (!sav->iv)
7292 panic("key_sa_stir_iv called with sav == NULL");
7293 key_randomfill(sav->iv, sav->ivlen);
7294 }
7295
7296 /* XXX too much? */
7297 static struct mbuf *
7298 key_alloc_mbuf(int l)
7299 {
7300 struct mbuf *m = NULL, *n;
7301 int len, t;
7302
7303 len = l;
7304 while (len > 0) {
7305 MGET(n, MB_DONTWAIT, MT_DATA);
7306 if (n && len > MLEN)
7307 MCLGET(n, MB_DONTWAIT);
7308 if (!n) {
7309 m_freem(m);
7310 return NULL;
7311 }
7312
7313 n->m_next = NULL;
7314 n->m_len = 0;
7315 n->m_len = M_TRAILINGSPACE(n);
7316 /* use the bottom of mbuf, hoping we can prepend afterwards */
7317 if (n->m_len > len) {
7318 t = (n->m_len - len) & ~(sizeof(long) - 1);
7319 n->m_data += t;
7320 n->m_len = len;
7321 }
7322
7323 len -= n->m_len;
7324
7325 if (m)
7326 m_cat(m, n);
7327 else
7328 m = n;
7329 }
7330
7331 return m;
7332 }
DragonFly vkernel multiprocessor port