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Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / netipsec / key.c
blob15863bfa2ff93037ee1b4b448a5ef659d836951d
1 /* $NetBSD: key.c,v 1.61 2009/03/18 10:22:43 cegger Exp $ */
2 /* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.3 2004/02/14 22:23:23 bms 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 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: key.c,v 1.61 2009/03/18 10:22:43 cegger Exp $");
36
37 /*
38 * This code is referd to RFC 2367
39 */
40
41 #include "opt_inet.h"
42 #ifdef __FreeBSD__
43 #include "opt_inet6.h"
44 #endif
45 #include "opt_ipsec.h"
46 #ifdef __NetBSD__
47 #include "opt_gateway.h"
48 #endif
49
50 #include <sys/types.h>
51 #include <sys/param.h>
52 #include <sys/systm.h>
53 #include <sys/callout.h>
54 #include <sys/kernel.h>
55 #include <sys/mbuf.h>
56 #include <sys/domain.h>
57 #include <sys/protosw.h>
58 #include <sys/malloc.h>
59 #include <sys/socket.h>
60 #include <sys/socketvar.h>
61 #include <sys/sysctl.h>
62 #include <sys/errno.h>
63 #include <sys/proc.h>
64 #include <sys/queue.h>
65 #include <sys/syslog.h>
66 #include <sys/once.h>
67
68 #include <net/if.h>
69 #include <net/route.h>
70 #include <net/raw_cb.h>
71
72 #include <netinet/in.h>
73 #include <netinet/in_systm.h>
74 #include <netinet/ip.h>
75 #include <netinet/in_var.h>
76 #ifdef INET
77 #include <netinet/ip_var.h>
78 #endif
79
80 #ifdef INET6
81 #include <netinet/ip6.h>
82 #include <netinet6/in6_var.h>
83 #include <netinet6/ip6_var.h>
84 #endif /* INET6 */
85
86 #ifdef INET
87 #include <netinet/in_pcb.h>
88 #endif
89 #ifdef INET6
90 #include <netinet6/in6_pcb.h>
91 #endif /* INET6 */
92
93 #include <net/pfkeyv2.h>
94 #include <netipsec/keydb.h>
95 #include <netipsec/key.h>
96 #include <netipsec/keysock.h>
97 #include <netipsec/key_debug.h>
98
99 #include <netipsec/ipsec.h>
100 #ifdef INET6
101 #include <netipsec/ipsec6.h>
102 #endif
103 #include <netipsec/ipsec_private.h>
104
105 #include <netipsec/xform.h>
106 #include <netipsec/ipsec_osdep.h>
107 #include <netipsec/ipcomp.h>
108
109
110 #include <machine/stdarg.h>
111
112
113 #include <net/net_osdep.h>
114
115 #define FULLMASK 0xff
116 #define _BITS(bytes) ((bytes) << 3)
117
118 percpu_t *pfkeystat_percpu;
119
120 /*
121 * Note on SA reference counting:
122 * - SAs that are not in DEAD state will have (total external reference + 1)
123 * following value in reference count field. they cannot be freed and are
124 * referenced from SA header.
125 * - SAs that are in DEAD state will have (total external reference)
126 * in reference count field. they are ready to be freed. reference from
127 * SA header will be removed in key_delsav(), when the reference count
128 * field hits 0 (= no external reference other than from SA header.
129 */
130
131 u_int32_t key_debug_level = 0;
132 static u_int key_spi_trycnt = 1000;
133 static u_int32_t key_spi_minval = 0x100;
134 static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
135 static u_int32_t policy_id = 0;
136 static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
137 static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
138 static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
139 static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
140 static int key_prefered_oldsa = 0; /* prefered old sa rather than new sa.*/
141
142 static u_int32_t acq_seq = 0;
143 static int key_tick_init_random = 0;
144
145 static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
146 static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
147 static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
148 /* registed list */
149 #ifndef IPSEC_NONBLOCK_ACQUIRE
150 static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
151 #endif
152 static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
153
154 /* search order for SAs */
155 static u_int saorder_state_valid[] = {
156 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
157 /*
158 * This order is important because we must select the oldest SA
159 * for outbound processing. For inbound, This is not important.
160 */
161 };
162 static u_int saorder_state_alive[] = {
163 /* except DEAD */
164 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
165 };
166 static u_int saorder_state_any[] = {
167 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
168 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
169 };
170
171 static const int minsize[] = {
172 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
173 sizeof(struct sadb_sa), /* SADB_EXT_SA */
174 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
175 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
176 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
177 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
178 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
179 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
180 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
181 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
182 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
183 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
184 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
185 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
186 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
187 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
188 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
189 0, /* SADB_X_EXT_KMPRIVATE */
190 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
191 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
192 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */
193 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */
194 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */
195 sizeof(struct sadb_address), /* SADB_X_EXT_NAT_T_OA */
196 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */
197 };
198 static const int maxsize[] = {
199 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
200 sizeof(struct sadb_sa), /* SADB_EXT_SA */
201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
202 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
203 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
204 0, /* SADB_EXT_ADDRESS_SRC */
205 0, /* SADB_EXT_ADDRESS_DST */
206 0, /* SADB_EXT_ADDRESS_PROXY */
207 0, /* SADB_EXT_KEY_AUTH */
208 0, /* SADB_EXT_KEY_ENCRYPT */
209 0, /* SADB_EXT_IDENTITY_SRC */
210 0, /* SADB_EXT_IDENTITY_DST */
211 0, /* SADB_EXT_SENSITIVITY */
212 0, /* SADB_EXT_PROPOSAL */
213 0, /* SADB_EXT_SUPPORTED_AUTH */
214 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
215 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
216 0, /* SADB_X_EXT_KMPRIVATE */
217 0, /* SADB_X_EXT_POLICY */
218 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
219 sizeof(struct sadb_x_nat_t_type), /* SADB_X_EXT_NAT_T_TYPE */
220 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_SPORT */
221 sizeof(struct sadb_x_nat_t_port), /* SADB_X_EXT_NAT_T_DPORT */
222 0, /* SADB_X_EXT_NAT_T_OA */
223 sizeof(struct sadb_x_nat_t_frag), /* SADB_X_EXT_NAT_T_FRAG */
224 };
225
226 static int ipsec_esp_keymin = 256;
227 static int ipsec_esp_auth = 0;
228 static int ipsec_ah_keymin = 128;
229
230 #ifdef SYSCTL_DECL
231 SYSCTL_DECL(_net_key);
232 #endif
233
234 #ifdef SYSCTL_INT
235 SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
236 &key_debug_level, 0, "");
237
238 /* max count of trial for the decision of spi value */
239 SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
240 &key_spi_trycnt, 0, "");
241
242 /* minimum spi value to allocate automatically. */
243 SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
244 &key_spi_minval, 0, "");
245
246 /* maximun spi value to allocate automatically. */
247 SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
248 &key_spi_maxval, 0, "");
249
250 /* interval to initialize randseed */
251 SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
252 &key_int_random, 0, "");
253
254 /* lifetime for larval SA */
255 SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
256 &key_larval_lifetime, 0, "");
257
258 /* counter for blocking to send SADB_ACQUIRE to IKEd */
259 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
260 &key_blockacq_count, 0, "");
261
262 /* lifetime for blocking to send SADB_ACQUIRE to IKEd */
263 SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
264 &key_blockacq_lifetime, 0, "");
265
266 /* ESP auth */
267 SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
268 &ipsec_esp_auth, 0, "");
269
270 /* minimum ESP key length */
271 SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
272 &ipsec_esp_keymin, 0, "");
273
274 /* minimum AH key length */
275 SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
276 &ipsec_ah_keymin, 0, "");
277
278 /* perfered old SA rather than new SA */
279 SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
280 &key_prefered_oldsa, 0, "");
281 #endif /* SYSCTL_INT */
282
283 #ifndef LIST_FOREACH
284 #define LIST_FOREACH(elm, head, field) \
285 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
286 #endif
287 #define __LIST_CHAINED(elm) \
288 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
289 #define LIST_INSERT_TAIL(head, elm, type, field) \
290 do {\
291 struct type *curelm = LIST_FIRST(head); \
292 if (curelm == NULL) {\
293 LIST_INSERT_HEAD(head, elm, field); \
294 } else { \
295 while (LIST_NEXT(curelm, field)) \
296 curelm = LIST_NEXT(curelm, field);\
297 LIST_INSERT_AFTER(curelm, elm, field);\
298 }\
299 } while (0)
300
301 #define KEY_CHKSASTATE(head, sav, name) \
302 /* do */ { \
303 if ((head) != (sav)) { \
304 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
305 (name), (head), (sav))); \
306 continue; \
307 } \
308 } /* while (0) */
309
310 #define KEY_CHKSPDIR(head, sp, name) \
311 do { \
312 if ((head) != (sp)) { \
313 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
314 "anyway continue.\n", \
315 (name), (head), (sp))); \
316 } \
317 } while (0)
318
319 MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
320
321 #if 1
322 #define KMALLOC(p, t, n) \
323 ((p) = (t) malloc((unsigned long)(n), M_SECA, M_NOWAIT))
324 #define KFREE(p) \
325 free((p), M_SECA)
326 #else
327 #define KMALLOC(p, t, n) \
328 do { \
329 ((p) = (t)malloc((unsigned long)(n), M_SECA, M_NOWAIT)); \
330 printf("%s %d: %p <- KMALLOC(%s, %d)\n", \
331 __FILE__, __LINE__, (p), #t, n); \
332 } while (0)
333
334 #define KFREE(p) \
335 do { \
336 printf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
337 free((p), M_SECA); \
338 } while (0)
339 #endif
340
341 /*
342 * set parameters into secpolicyindex buffer.
343 * Must allocate secpolicyindex buffer passed to this function.
344 */
345 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
346 do { \
347 memset((idx), 0, sizeof(struct secpolicyindex)); \
348 (idx)->dir = (_dir); \
349 (idx)->prefs = (ps); \
350 (idx)->prefd = (pd); \
351 (idx)->ul_proto = (ulp); \
352 memcpy(&(idx)->src, (s), ((const struct sockaddr *)(s))->sa_len); \
353 memcpy(&(idx)->dst, (d), ((const struct sockaddr *)(d))->sa_len); \
354 } while (0)
355
356 /*
357 * set parameters into secasindex buffer.
358 * Must allocate secasindex buffer before calling this function.
359 */
360 static int
361 key_setsecasidx (int, int, int, const struct sadb_address *,
362 const struct sadb_address *, struct secasindex *);
363
364 /* key statistics */
365 struct _keystat {
366 u_long getspi_count; /* the avarage of count to try to get new SPI */
367 } keystat;
368
369 struct sadb_msghdr {
370 struct sadb_msg *msg;
371 struct sadb_ext *ext[SADB_EXT_MAX + 1];
372 int extoff[SADB_EXT_MAX + 1];
373 int extlen[SADB_EXT_MAX + 1];
374 };
375
376 static struct secasvar *key_allocsa_policy (const struct secasindex *);
377 static void key_freesp_so (struct secpolicy **);
378 static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
379 static void key_delsp (struct secpolicy *);
380 static struct secpolicy *key_getsp (struct secpolicyindex *);
381 static struct secpolicy *key_getspbyid (u_int32_t);
382 static u_int16_t key_newreqid (void);
383 static struct mbuf *key_gather_mbuf (struct mbuf *,
384 const struct sadb_msghdr *, int, int, ...);
385 static int key_spdadd (struct socket *, struct mbuf *,
386 const struct sadb_msghdr *);
387 static u_int32_t key_getnewspid (void);
388 static int key_spddelete (struct socket *, struct mbuf *,
389 const struct sadb_msghdr *);
390 static int key_spddelete2 (struct socket *, struct mbuf *,
391 const struct sadb_msghdr *);
392 static int key_spdget (struct socket *, struct mbuf *,
393 const struct sadb_msghdr *);
394 static int key_spdflush (struct socket *, struct mbuf *,
395 const struct sadb_msghdr *);
396 static int key_spddump (struct socket *, struct mbuf *,
397 const struct sadb_msghdr *);
398 static struct mbuf * key_setspddump (int *errorp, pid_t);
399 static struct mbuf * key_setspddump_chain (int *errorp, int *lenp, pid_t pid);
400 #ifdef IPSEC_NAT_T
401 static int key_nat_map (struct socket *, struct mbuf *,
402 const struct sadb_msghdr *);
403 #endif
404 static struct mbuf *key_setdumpsp (struct secpolicy *,
405 u_int8_t, u_int32_t, pid_t);
406 static u_int key_getspreqmsglen (struct secpolicy *);
407 static int key_spdexpire (struct secpolicy *);
408 static struct secashead *key_newsah (struct secasindex *);
409 static void key_delsah (struct secashead *);
410 static struct secasvar *key_newsav (struct mbuf *,
411 const struct sadb_msghdr *, struct secashead *, int *,
412 const char*, int);
413 #define KEY_NEWSAV(m, sadb, sah, e) \
414 key_newsav(m, sadb, sah, e, __FILE__, __LINE__)
415 static void key_delsav (struct secasvar *);
416 static struct secashead *key_getsah (struct secasindex *);
417 static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
418 static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
419 static int key_setsaval (struct secasvar *, struct mbuf *,
420 const struct sadb_msghdr *);
421 static int key_mature (struct secasvar *);
422 static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
423 u_int8_t, u_int32_t, u_int32_t);
424 #ifdef IPSEC_NAT_T
425 static struct mbuf *key_setsadbxport (u_int16_t, u_int16_t);
426 static struct mbuf *key_setsadbxtype (u_int16_t);
427 #endif
428 static void key_porttosaddr (union sockaddr_union *, u_int16_t);
429 static int key_checksalen (const union sockaddr_union *);
430 static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
431 u_int32_t, pid_t, u_int16_t);
432 static struct mbuf *key_setsadbsa (struct secasvar *);
433 static struct mbuf *key_setsadbaddr (u_int16_t,
434 const struct sockaddr *, u_int8_t, u_int16_t);
435 #if 0
436 static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, void *,
437 int, u_int64_t);
438 #endif
439 static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int16_t);
440 static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
441 u_int32_t);
442 static void *key_newbuf (const void *, u_int);
443 #ifdef INET6
444 static int key_ismyaddr6 (struct sockaddr_in6 *);
445 #endif
446
447 /* flags for key_cmpsaidx() */
448 #define CMP_HEAD 1 /* protocol, addresses. */
449 #define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
450 #define CMP_REQID 3 /* additionally HEAD, reaid. */
451 #define CMP_EXACTLY 4 /* all elements. */
452 static int key_cmpsaidx
453 (const struct secasindex *, const struct secasindex *, int);
454
455 static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int);
456 static int key_bbcmp (const void *, const void *, u_int);
457 static void key_srandom (void);
458 static u_int16_t key_satype2proto (u_int8_t);
459 static u_int8_t key_proto2satype (u_int16_t);
460
461 static int key_getspi (struct socket *, struct mbuf *,
462 const struct sadb_msghdr *);
463 static u_int32_t key_do_getnewspi (struct sadb_spirange *,
464 struct secasindex *);
465 #ifdef IPSEC_NAT_T
466 static int key_handle_natt_info (struct secasvar *,
467 const struct sadb_msghdr *);
468 #endif
469 static int key_update (struct socket *, struct mbuf *,
470 const struct sadb_msghdr *);
471 #ifdef IPSEC_DOSEQCHECK
472 static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
473 #endif
474 static int key_add (struct socket *, struct mbuf *,
475 const struct sadb_msghdr *);
476 static int key_setident (struct secashead *, struct mbuf *,
477 const struct sadb_msghdr *);
478 static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
479 const struct sadb_msghdr *);
480 static int key_delete (struct socket *, struct mbuf *,
481 const struct sadb_msghdr *);
482 static int key_get (struct socket *, struct mbuf *,
483 const struct sadb_msghdr *);
484
485 static void key_getcomb_setlifetime (struct sadb_comb *);
486 static struct mbuf *key_getcomb_esp (void);
487 static struct mbuf *key_getcomb_ah (void);
488 static struct mbuf *key_getcomb_ipcomp (void);
489 static struct mbuf *key_getprop (const struct secasindex *);
490
491 static int key_acquire (const struct secasindex *, struct secpolicy *);
492 #ifndef IPSEC_NONBLOCK_ACQUIRE
493 static struct secacq *key_newacq (const struct secasindex *);
494 static struct secacq *key_getacq (const struct secasindex *);
495 static struct secacq *key_getacqbyseq (u_int32_t);
496 #endif
497 static struct secspacq *key_newspacq (struct secpolicyindex *);
498 static struct secspacq *key_getspacq (struct secpolicyindex *);
499 static int key_acquire2 (struct socket *, struct mbuf *,
500 const struct sadb_msghdr *);
501 static int key_register (struct socket *, struct mbuf *,
502 const struct sadb_msghdr *);
503 static int key_expire (struct secasvar *);
504 static int key_flush (struct socket *, struct mbuf *,
505 const struct sadb_msghdr *);
506 static struct mbuf *key_setdump_chain (u_int8_t req_satype, int *errorp,
507 int *lenp, pid_t pid);
508 static int key_dump (struct socket *, struct mbuf *,
509 const struct sadb_msghdr *);
510 static int key_promisc (struct socket *, struct mbuf *,
511 const struct sadb_msghdr *);
512 static int key_senderror (struct socket *, struct mbuf *, int);
513 static int key_validate_ext (const struct sadb_ext *, int);
514 static int key_align (struct mbuf *, struct sadb_msghdr *);
515 #if 0
516 static const char *key_getfqdn (void);
517 static const char *key_getuserfqdn (void);
518 #endif
519 static void key_sa_chgstate (struct secasvar *, u_int8_t);
520 static inline void key_sp_dead (struct secpolicy *);
521 static void key_sp_unlink (struct secpolicy *sp);
522
523 static struct mbuf *key_alloc_mbuf (int);
524 struct callout key_timehandler_ch;
525
526 #define SA_ADDREF(p) do { \
527 (p)->refcnt++; \
528 IPSEC_ASSERT((p)->refcnt != 0, \
529 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \
530 } while (0)
531 #define SA_DELREF(p) do { \
532 IPSEC_ASSERT((p)->refcnt > 0, \
533 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \
534 (p)->refcnt--; \
535 } while (0)
536
537 #define SP_ADDREF(p) do { \
538 (p)->refcnt++; \
539 IPSEC_ASSERT((p)->refcnt != 0, \
540 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \
541 } while (0)
542 #define SP_DELREF(p) do { \
543 IPSEC_ASSERT((p)->refcnt > 0, \
544 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \
545 (p)->refcnt--; \
546 } while (0)
547
548
549 static inline void
550 key_sp_dead(struct secpolicy *sp)
551 {
552
553 /* mark the SP dead */
554 sp->state = IPSEC_SPSTATE_DEAD;
555 }
556
557 static void
558 key_sp_unlink(struct secpolicy *sp)
559 {
560
561 /* remove from SP index */
562 if (__LIST_CHAINED(sp)) {
563 LIST_REMOVE(sp, chain);
564 /* Release refcount held just for being on chain */
565 KEY_FREESP(&sp);
566 }
567 }
568
569
570 /*
571 * Return 0 when there are known to be no SP's for the specified
572 * direction. Otherwise return 1. This is used by IPsec code
573 * to optimize performance.
574 */
575 int
576 key_havesp(u_int dir)
577 {
578 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
579 LIST_FIRST(&sptree[dir]) != NULL : 1);
580 }
581
582 /* %%% IPsec policy management */
583 /*
584 * allocating a SP for OUTBOUND or INBOUND packet.
585 * Must call key_freesp() later.
586 * OUT: NULL: not found
587 * others: found and return the pointer.
588 */
589 struct secpolicy *
590 key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag)
591 {
592 struct secpolicy *sp;
593 int s;
594
595 IPSEC_ASSERT(spidx != NULL, ("key_allocsp: null spidx"));
596 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
597 ("key_allocsp: invalid direction %u", dir));
598
599 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
600 printf("DP key_allocsp from %s:%u\n", where, tag));
601
602 /* get a SP entry */
603 s = splsoftnet(); /*called from softclock()*/
604 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
605 printf("*** objects\n");
606 kdebug_secpolicyindex(spidx));
607
608 LIST_FOREACH(sp, &sptree[dir], chain) {
609 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
610 printf("*** in SPD\n");
611 kdebug_secpolicyindex(&sp->spidx));
612
613 if (sp->state == IPSEC_SPSTATE_DEAD)
614 continue;
615 if (key_cmpspidx_withmask(&sp->spidx, spidx))
616 goto found;
617 }
618 sp = NULL;
619 found:
620 if (sp) {
621 /* sanity check */
622 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
623
624 /* found a SPD entry */
625 sp->lastused = time_second;
626 SP_ADDREF(sp);
627 }
628 splx(s);
629
630 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
631 printf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n",
632 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
633 return sp;
634 }
635
636 /*
637 * allocating a SP for OUTBOUND or INBOUND packet.
638 * Must call key_freesp() later.
639 * OUT: NULL: not found
640 * others: found and return the pointer.
641 */
642 struct secpolicy *
643 key_allocsp2(u_int32_t spi,
644 union sockaddr_union *dst,
645 u_int8_t proto,
646 u_int dir,
647 const char* where, int tag)
648 {
649 struct secpolicy *sp;
650 int s;
651
652 IPSEC_ASSERT(dst != NULL, ("key_allocsp2: null dst"));
653 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
654 ("key_allocsp2: invalid direction %u", dir));
655
656 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
657 printf("DP key_allocsp2 from %s:%u\n", where, tag));
658
659 /* get a SP entry */
660 s = splsoftnet(); /*called from softclock()*/
661 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
662 printf("*** objects\n");
663 printf("spi %u proto %u dir %u\n", spi, proto, dir);
664 kdebug_sockaddr(&dst->sa));
665
666 LIST_FOREACH(sp, &sptree[dir], chain) {
667 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
668 printf("*** in SPD\n");
669 kdebug_secpolicyindex(&sp->spidx));
670
671 if (sp->state == IPSEC_SPSTATE_DEAD)
672 continue;
673 /* compare simple values, then dst address */
674 if (sp->spidx.ul_proto != proto)
675 continue;
676 /* NB: spi's must exist and match */
677 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi)
678 continue;
679 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0)
680 goto found;
681 }
682 sp = NULL;
683 found:
684 if (sp) {
685 /* sanity check */
686 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2");
687
688 /* found a SPD entry */
689 sp->lastused = time_second;
690 SP_ADDREF(sp);
691 }
692 splx(s);
693
694 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
695 printf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n",
696 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
697 return sp;
698 }
699
700 /*
701 * return a policy that matches this particular inbound packet.
702 * XXX slow
703 */
704 struct secpolicy *
705 key_gettunnel(const struct sockaddr *osrc,
706 const struct sockaddr *odst,
707 const struct sockaddr *isrc,
708 const struct sockaddr *idst,
709 const char* where, int tag)
710 {
711 struct secpolicy *sp;
712 const int dir = IPSEC_DIR_INBOUND;
713 int s;
714 struct ipsecrequest *r1, *r2, *p;
715 struct secpolicyindex spidx;
716
717 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
718 printf("DP key_gettunnel from %s:%u\n", where, tag));
719
720 if (isrc->sa_family != idst->sa_family) {
721 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
722 isrc->sa_family, idst->sa_family));
723 sp = NULL;
724 goto done;
725 }
726
727 s = splsoftnet(); /*called from softclock()*/
728 LIST_FOREACH(sp, &sptree[dir], chain) {
729 if (sp->state == IPSEC_SPSTATE_DEAD)
730 continue;
731
732 r1 = r2 = NULL;
733 for (p = sp->req; p; p = p->next) {
734 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
735 continue;
736
737 r1 = r2;
738 r2 = p;
739
740 if (!r1) {
741 /* here we look at address matches only */
742 spidx = sp->spidx;
743 if (isrc->sa_len > sizeof(spidx.src) ||
744 idst->sa_len > sizeof(spidx.dst))
745 continue;
746 memcpy(&spidx.src, isrc, isrc->sa_len);
747 memcpy(&spidx.dst, idst, idst->sa_len);
748 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
749 continue;
750 } else {
751 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) ||
752 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0))
753 continue;
754 }
755
756 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) ||
757 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0))
758 continue;
759
760 goto found;
761 }
762 }
763 sp = NULL;
764 found:
765 if (sp) {
766 sp->lastused = time_second;
767 SP_ADDREF(sp);
768 }
769 splx(s);
770 done:
771 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
772 printf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n",
773 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
774 return sp;
775 }
776
777 /*
778 * allocating an SA entry for an *OUTBOUND* packet.
779 * checking each request entries in SP, and acquire an SA if need.
780 * OUT: 0: there are valid requests.
781 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
782 */
783 int
784 key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx)
785 {
786 u_int level;
787 int error;
788
789 IPSEC_ASSERT(isr != NULL, ("key_checkrequest: null isr"));
790 IPSEC_ASSERT(saidx != NULL, ("key_checkrequest: null saidx"));
791 IPSEC_ASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
792 saidx->mode == IPSEC_MODE_TUNNEL,
793 ("key_checkrequest: unexpected policy %u", saidx->mode));
794
795 /* get current level */
796 level = ipsec_get_reqlevel(isr);
797
798 /*
799 * XXX guard against protocol callbacks from the crypto
800 * thread as they reference ipsecrequest.sav which we
801 * temporarily null out below. Need to rethink how we
802 * handle bundled SA's in the callback thread.
803 */
804 IPSEC_SPLASSERT_SOFTNET("key_checkrequest");
805 #if 0
806 /*
807 * We do allocate new SA only if the state of SA in the holder is
808 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
809 */
810 if (isr->sav != NULL) {
811 if (isr->sav->sah == NULL)
812 panic("key_checkrequest: sah is null");
813 if (isr->sav == (struct secasvar *)LIST_FIRST(
814 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
815 KEY_FREESAV(&isr->sav);
816 isr->sav = NULL;
817 }
818 }
819 #else
820 /*
821 * we free any SA stashed in the IPsec request because a different
822 * SA may be involved each time this request is checked, either
823 * because new SAs are being configured, or this request is
824 * associated with an unconnected datagram socket, or this request
825 * is associated with a system default policy.
826 *
827 * The operation may have negative impact to performance. We may
828 * want to check cached SA carefully, rather than picking new SA
829 * every time.
830 */
831 if (isr->sav != NULL) {
832 KEY_FREESAV(&isr->sav);
833 isr->sav = NULL;
834 }
835 #endif
836
837 /*
838 * new SA allocation if no SA found.
839 * key_allocsa_policy should allocate the oldest SA available.
840 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
841 */
842 if (isr->sav == NULL)
843 isr->sav = key_allocsa_policy(saidx);
844
845 /* When there is SA. */
846 if (isr->sav != NULL) {
847 if (isr->sav->state != SADB_SASTATE_MATURE &&
848 isr->sav->state != SADB_SASTATE_DYING)
849 return EINVAL;
850 return 0;
851 }
852
853 /* there is no SA */
854 error = key_acquire(saidx, isr->sp);
855 if (error != 0) {
856 /* XXX What should I do ? */
857 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
858 "from key_acquire.\n", error));
859 return error;
860 }
861
862 if (level != IPSEC_LEVEL_REQUIRE) {
863 /* XXX sigh, the interface to this routine is botched */
864 IPSEC_ASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA"));
865 return 0;
866 } else {
867 return ENOENT;
868 }
869 }
870
871 /*
872 * allocating a SA for policy entry from SAD.
873 * NOTE: searching SAD of aliving state.
874 * OUT: NULL: not found.
875 * others: found and return the pointer.
876 */
877 static struct secasvar *
878 key_allocsa_policy(const struct secasindex *saidx)
879 {
880 struct secashead *sah;
881 struct secasvar *sav;
882 u_int stateidx, state;
883
884 LIST_FOREACH(sah, &sahtree, chain) {
885 if (sah->state == SADB_SASTATE_DEAD)
886 continue;
887 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
888 goto found;
889 }
890
891 return NULL;
892
893 found:
894
895 /* search valid state */
896 for (stateidx = 0;
897 stateidx < _ARRAYLEN(saorder_state_valid);
898 stateidx++) {
899
900 state = saorder_state_valid[stateidx];
901
902 sav = key_do_allocsa_policy(sah, state);
903 if (sav != NULL)
904 return sav;
905 }
906
907 return NULL;
908 }
909
910 /*
911 * searching SAD with direction, protocol, mode and state.
912 * called by key_allocsa_policy().
913 * OUT:
914 * NULL : not found
915 * others : found, pointer to a SA.
916 */
917 static struct secasvar *
918 key_do_allocsa_policy(struct secashead *sah, u_int state)
919 {
920 struct secasvar *sav, *nextsav, *candidate, *d;
921
922 /* initilize */
923 candidate = NULL;
924
925 for (sav = LIST_FIRST(&sah->savtree[state]);
926 sav != NULL;
927 sav = nextsav) {
928
929 nextsav = LIST_NEXT(sav, chain);
930
931 /* sanity check */
932 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
933
934 /* initialize */
935 if (candidate == NULL) {
936 candidate = sav;
937 continue;
938 }
939
940 /* Which SA is the better ? */
941
942 /* sanity check 2 */
943 if (candidate->lft_c == NULL || sav->lft_c == NULL)
944 panic("key_do_allocsa_policy: "
945 "lifetime_current is NULL");
946
947 /* What the best method is to compare ? */
948 if (key_prefered_oldsa) {
949 if (candidate->lft_c->sadb_lifetime_addtime >
950 sav->lft_c->sadb_lifetime_addtime) {
951 candidate = sav;
952 }
953 continue;
954 /*NOTREACHED*/
955 }
956
957 /* prefered new sa rather than old sa */
958 if (candidate->lft_c->sadb_lifetime_addtime <
959 sav->lft_c->sadb_lifetime_addtime) {
960 d = candidate;
961 candidate = sav;
962 } else
963 d = sav;
964
965 /*
966 * prepared to delete the SA when there is more
967 * suitable candidate and the lifetime of the SA is not
968 * permanent.
969 */
970 if (d->lft_c->sadb_lifetime_addtime != 0) {
971 struct mbuf *m, *result;
972 uint8_t satype;
973
974 key_sa_chgstate(d, SADB_SASTATE_DEAD);
975
976 IPSEC_ASSERT(d->refcnt > 0,
977 ("key_do_allocsa_policy: bogus ref count"));
978
979 satype = key_proto2satype(d->sah->saidx.proto);
980 if (satype == 0)
981 goto msgfail;
982
983 m = key_setsadbmsg(SADB_DELETE, 0,
984 satype, 0, 0, d->refcnt - 1);
985 if (!m)
986 goto msgfail;
987 result = m;
988
989 /* set sadb_address for saidx's. */
990 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
991 &d->sah->saidx.src.sa,
992 d->sah->saidx.src.sa.sa_len << 3,
993 IPSEC_ULPROTO_ANY);
994 if (!m)
995 goto msgfail;
996 m_cat(result, m);
997
998 /* set sadb_address for saidx's. */
999 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
1000 &d->sah->saidx.src.sa,
1001 d->sah->saidx.src.sa.sa_len << 3,
1002 IPSEC_ULPROTO_ANY);
1003 if (!m)
1004 goto msgfail;
1005 m_cat(result, m);
1006
1007 /* create SA extension */
1008 m = key_setsadbsa(d);
1009 if (!m)
1010 goto msgfail;
1011 m_cat(result, m);
1012
1013 if (result->m_len < sizeof(struct sadb_msg)) {
1014 result = m_pullup(result,
1015 sizeof(struct sadb_msg));
1016 if (result == NULL)
1017 goto msgfail;
1018 }
1019
1020 result->m_pkthdr.len = 0;
1021 for (m = result; m; m = m->m_next)
1022 result->m_pkthdr.len += m->m_len;
1023 mtod(result, struct sadb_msg *)->sadb_msg_len =
1024 PFKEY_UNIT64(result->m_pkthdr.len);
1025
1026 if (key_sendup_mbuf(NULL, result,
1027 KEY_SENDUP_REGISTERED))
1028 goto msgfail;
1029 msgfail:
1030 KEY_FREESAV(&d);
1031 }
1032 }
1033
1034 if (candidate) {
1035 SA_ADDREF(candidate);
1036 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1037 printf("DP allocsa_policy cause "
1038 "refcnt++:%d SA:%p\n",
1039 candidate->refcnt, candidate));
1040 }
1041 return candidate;
1042 }
1043
1044 /*
1045 * allocating a usable SA entry for a *INBOUND* packet.
1046 * Must call key_freesav() later.
1047 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
1048 * NULL: not found, or error occurred.
1049 *
1050 * In the comparison, no source address is used--for RFC2401 conformance.
1051 * To quote, from section 4.1:
1052 * A security association is uniquely identified by a triple consisting
1053 * of a Security Parameter Index (SPI), an IP Destination Address, and a
1054 * security protocol (AH or ESP) identifier.
1055 * Note that, however, we do need to keep source address in IPsec SA.
1056 * IKE specification and PF_KEY specification do assume that we
1057 * keep source address in IPsec SA. We see a tricky situation here.
1058 *
1059 * sport and dport are used for NAT-T. network order is always used.
1060 */
1061 struct secasvar *
1062 key_allocsa(
1063 const union sockaddr_union *dst,
1064 u_int proto,
1065 u_int32_t spi,
1066 u_int16_t sport,
1067 u_int16_t dport,
1068 const char* where, int tag)
1069 {
1070 struct secashead *sah;
1071 struct secasvar *sav;
1072 u_int stateidx, state;
1073 int s;
1074 int chkport = 0;
1075
1076 int must_check_spi = 1;
1077 int must_check_alg = 0;
1078 u_int16_t cpi = 0;
1079 u_int8_t algo = 0;
1080
1081 #ifdef IPSEC_NAT_T
1082 if ((sport != 0) && (dport != 0))
1083 chkport = 1;
1084 #endif
1085
1086 IPSEC_ASSERT(dst != NULL, ("key_allocsa: null dst address"));
1087
1088 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1089 printf("DP key_allocsa from %s:%u\n", where, tag));
1090
1091 /*
1092 * XXX IPCOMP case
1093 * We use cpi to define spi here. In the case where cpi <=
1094 * IPCOMP_CPI_NEGOTIATE_MIN, cpi just define the algorithm used, not
1095 * the real spi. In this case, don't check the spi but check the
1096 * algorithm
1097 */
1098
1099 if (proto == IPPROTO_IPCOMP) {
1100 u_int32_t tmp;
1101 tmp = ntohl(spi);
1102 cpi = (u_int16_t) tmp;
1103 if (cpi < IPCOMP_CPI_NEGOTIATE_MIN) {
1104 algo = (u_int8_t) cpi;
1105 must_check_spi = 0;
1106 must_check_alg = 1;
1107 }
1108 }
1109
1110 /*
1111 * searching SAD.
1112 * XXX: to be checked internal IP header somewhere. Also when
1113 * IPsec tunnel packet is received. But ESP tunnel mode is
1114 * encrypted so we can't check internal IP header.
1115 */
1116 s = splsoftnet(); /*called from softclock()*/
1117 LIST_FOREACH(sah, &sahtree, chain) {
1118 /* search valid state */
1119 for (stateidx = 0;
1120 stateidx < _ARRAYLEN(saorder_state_valid);
1121 stateidx++) {
1122 state = saorder_state_valid[stateidx];
1123 LIST_FOREACH(sav, &sah->savtree[state], chain) {
1124 /* sanity check */
1125 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
1126 /* do not return entries w/ unusable state */
1127 if (sav->state != SADB_SASTATE_MATURE &&
1128 sav->state != SADB_SASTATE_DYING)
1129 continue;
1130 if (proto != sav->sah->saidx.proto)
1131 continue;
1132 if (must_check_spi && spi != sav->spi)
1133 continue;
1134 /* XXX only on the ipcomp case */
1135 if (must_check_alg && algo != sav->alg_comp)
1136 continue;
1137
1138 #if 0 /* don't check src */
1139 /* Fix port in src->sa */
1140
1141 /* check src address */
1142 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0)
1143 continue;
1144 #endif
1145 /* fix port of dst address XXX*/
1146 key_porttosaddr(__UNCONST(dst), dport);
1147 /* check dst address */
1148 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, chkport) != 0)
1149 continue;
1150 SA_ADDREF(sav);
1151 goto done;
1152 }
1153 }
1154 }
1155 sav = NULL;
1156 done:
1157 splx(s);
1158
1159 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1160 printf("DP key_allocsa return SA:%p; refcnt %u\n",
1161 sav, sav ? sav->refcnt : 0));
1162 return sav;
1163 }
1164
1165 /*
1166 * Must be called after calling key_allocsp().
1167 * For both the packet without socket and key_freeso().
1168 */
1169 void
1170 _key_freesp(struct secpolicy **spp, const char* where, int tag)
1171 {
1172 struct secpolicy *sp = *spp;
1173
1174 IPSEC_ASSERT(sp != NULL, ("key_freesp: null sp"));
1175
1176 SP_DELREF(sp);
1177
1178 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1179 printf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n",
1180 sp, sp->id, where, tag, sp->refcnt));
1181
1182 if (sp->refcnt == 0) {
1183 *spp = NULL;
1184 key_delsp(sp);
1185 }
1186 }
1187
1188 /*
1189 * Must be called after calling key_allocsp().
1190 * For the packet with socket.
1191 */
1192 void
1193 key_freeso(struct socket *so)
1194 {
1195 /* sanity check */
1196 IPSEC_ASSERT(so != NULL, ("key_freeso: null so"));
1197
1198 switch (so->so_proto->pr_domain->dom_family) {
1199 #ifdef INET
1200 case PF_INET:
1201 {
1202 struct inpcb *pcb = sotoinpcb(so);
1203
1204 /* Does it have a PCB ? */
1205 if (pcb == NULL)
1206 return;
1207 key_freesp_so(&pcb->inp_sp->sp_in);
1208 key_freesp_so(&pcb->inp_sp->sp_out);
1209 }
1210 break;
1211 #endif
1212 #ifdef INET6
1213 case PF_INET6:
1214 {
1215 #ifdef HAVE_NRL_INPCB
1216 struct inpcb *pcb = sotoinpcb(so);
1217
1218 /* Does it have a PCB ? */
1219 if (pcb == NULL)
1220 return;
1221 key_freesp_so(&pcb->inp_sp->sp_in);
1222 key_freesp_so(&pcb->inp_sp->sp_out);
1223 #else
1224 struct in6pcb *pcb = sotoin6pcb(so);
1225
1226 /* Does it have a PCB ? */
1227 if (pcb == NULL)
1228 return;
1229 key_freesp_so(&pcb->in6p_sp->sp_in);
1230 key_freesp_so(&pcb->in6p_sp->sp_out);
1231 #endif
1232 }
1233 break;
1234 #endif /* INET6 */
1235 default:
1236 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1237 so->so_proto->pr_domain->dom_family));
1238 return;
1239 }
1240 }
1241
1242 static void
1243 key_freesp_so(struct secpolicy **sp)
1244 {
1245 IPSEC_ASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp"));
1246
1247 if ((*sp)->policy == IPSEC_POLICY_ENTRUST ||
1248 (*sp)->policy == IPSEC_POLICY_BYPASS)
1249 return;
1250
1251 IPSEC_ASSERT((*sp)->policy == IPSEC_POLICY_IPSEC,
1252 ("key_freesp_so: invalid policy %u", (*sp)->policy));
1253 KEY_FREESP(sp);
1254 }
1255
1256 /*
1257 * Must be called after calling key_allocsa().
1258 * This function is called by key_freesp() to free some SA allocated
1259 * for a policy.
1260 */
1261 void
1262 key_freesav(struct secasvar **psav, const char* where, int tag)
1263 {
1264 struct secasvar *sav = *psav;
1265
1266 IPSEC_ASSERT(sav != NULL, ("key_freesav: null sav"));
1267
1268 SA_DELREF(sav);
1269
1270 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1271 printf("DP key_freesav SA:%p (SPI %lu) from %s:%u; refcnt now %u\n",
1272 sav, (u_long)ntohl(sav->spi),
1273 where, tag, sav->refcnt));
1274
1275 if (sav->refcnt == 0) {
1276 *psav = NULL;
1277 key_delsav(sav);
1278 }
1279 }
1280
1281 /* %%% SPD management */
1282 /*
1283 * free security policy entry.
1284 */
1285 static void
1286 key_delsp(struct secpolicy *sp)
1287 {
1288 int s;
1289
1290 IPSEC_ASSERT(sp != NULL, ("key_delsp: null sp"));
1291
1292 key_sp_dead(sp);
1293
1294 IPSEC_ASSERT(sp->refcnt == 0,
1295 ("key_delsp: SP with references deleted (refcnt %u)",
1296 sp->refcnt));
1297
1298 s = splsoftnet(); /*called from softclock()*/
1299
1300 {
1301 struct ipsecrequest *isr = sp->req, *nextisr;
1302
1303 while (isr != NULL) {
1304 if (isr->sav != NULL) {
1305 KEY_FREESAV(&isr->sav);
1306 isr->sav = NULL;
1307 }
1308
1309 nextisr = isr->next;
1310 KFREE(isr);
1311 isr = nextisr;
1312 }
1313 }
1314
1315 KFREE(sp);
1316
1317 splx(s);
1318 }
1319
1320 /*
1321 * search SPD
1322 * OUT: NULL : not found
1323 * others : found, pointer to a SP.
1324 */
1325 static struct secpolicy *
1326 key_getsp(struct secpolicyindex *spidx)
1327 {
1328 struct secpolicy *sp;
1329
1330 IPSEC_ASSERT(spidx != NULL, ("key_getsp: null spidx"));
1331
1332 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1333 if (sp->state == IPSEC_SPSTATE_DEAD)
1334 continue;
1335 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1336 SP_ADDREF(sp);
1337 return sp;
1338 }
1339 }
1340
1341 return NULL;
1342 }
1343
1344 /*
1345 * get SP by index.
1346 * OUT: NULL : not found
1347 * others : found, pointer to a SP.
1348 */
1349 static struct secpolicy *
1350 key_getspbyid(u_int32_t id)
1351 {
1352 struct secpolicy *sp;
1353
1354 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1355 if (sp->state == IPSEC_SPSTATE_DEAD)
1356 continue;
1357 if (sp->id == id) {
1358 SP_ADDREF(sp);
1359 return sp;
1360 }
1361 }
1362
1363 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1364 if (sp->state == IPSEC_SPSTATE_DEAD)
1365 continue;
1366 if (sp->id == id) {
1367 SP_ADDREF(sp);
1368 return sp;
1369 }
1370 }
1371
1372 return NULL;
1373 }
1374
1375 struct secpolicy *
1376 key_newsp(const char* where, int tag)
1377 {
1378 struct secpolicy *newsp = NULL;
1379
1380 newsp = (struct secpolicy *)
1381 malloc(sizeof(struct secpolicy), M_SECA, M_NOWAIT|M_ZERO);
1382 if (newsp) {
1383 newsp->refcnt = 1;
1384 newsp->req = NULL;
1385 }
1386
1387 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
1388 printf("DP key_newsp from %s:%u return SP:%p\n",
1389 where, tag, newsp));
1390 return newsp;
1391 }
1392
1393 /*
1394 * create secpolicy structure from sadb_x_policy structure.
1395 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1396 * so must be set properly later.
1397 */
1398 struct secpolicy *
1399 key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
1400 {
1401 struct secpolicy *newsp;
1402
1403 /* sanity check */
1404 if (xpl0 == NULL)
1405 panic("key_msg2sp: NULL pointer was passed");
1406 if (len < sizeof(*xpl0))
1407 panic("key_msg2sp: invalid length");
1408 if (len != PFKEY_EXTLEN(xpl0)) {
1409 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1410 *error = EINVAL;
1411 return NULL;
1412 }
1413
1414 if ((newsp = KEY_NEWSP()) == NULL) {
1415 *error = ENOBUFS;
1416 return NULL;
1417 }
1418
1419 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1420 newsp->policy = xpl0->sadb_x_policy_type;
1421
1422 /* check policy */
1423 switch (xpl0->sadb_x_policy_type) {
1424 case IPSEC_POLICY_DISCARD:
1425 case IPSEC_POLICY_NONE:
1426 case IPSEC_POLICY_ENTRUST:
1427 case IPSEC_POLICY_BYPASS:
1428 newsp->req = NULL;
1429 break;
1430
1431 case IPSEC_POLICY_IPSEC:
1432 {
1433 int tlen;
1434 struct sadb_x_ipsecrequest *xisr;
1435 struct ipsecrequest **p_isr = &newsp->req;
1436
1437 /* validity check */
1438 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1439 ipseclog((LOG_DEBUG,
1440 "key_msg2sp: Invalid msg length.\n"));
1441 KEY_FREESP(&newsp);
1442 *error = EINVAL;
1443 return NULL;
1444 }
1445
1446 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1447 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1448
1449 while (tlen > 0) {
1450 /* length check */
1451 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1452 ipseclog((LOG_DEBUG, "key_msg2sp: "
1453 "invalid ipsecrequest length.\n"));
1454 KEY_FREESP(&newsp);
1455 *error = EINVAL;
1456 return NULL;
1457 }
1458
1459 /* allocate request buffer */
1460 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1461 if ((*p_isr) == NULL) {
1462 ipseclog((LOG_DEBUG,
1463 "key_msg2sp: No more memory.\n"));
1464 KEY_FREESP(&newsp);
1465 *error = ENOBUFS;
1466 return NULL;
1467 }
1468 memset(*p_isr, 0, sizeof(**p_isr));
1469
1470 /* set values */
1471 (*p_isr)->next = NULL;
1472
1473 switch (xisr->sadb_x_ipsecrequest_proto) {
1474 case IPPROTO_ESP:
1475 case IPPROTO_AH:
1476 case IPPROTO_IPCOMP:
1477 break;
1478 default:
1479 ipseclog((LOG_DEBUG,
1480 "key_msg2sp: invalid proto type=%u\n",
1481 xisr->sadb_x_ipsecrequest_proto));
1482 KEY_FREESP(&newsp);
1483 *error = EPROTONOSUPPORT;
1484 return NULL;
1485 }
1486 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1487
1488 switch (xisr->sadb_x_ipsecrequest_mode) {
1489 case IPSEC_MODE_TRANSPORT:
1490 case IPSEC_MODE_TUNNEL:
1491 break;
1492 case IPSEC_MODE_ANY:
1493 default:
1494 ipseclog((LOG_DEBUG,
1495 "key_msg2sp: invalid mode=%u\n",
1496 xisr->sadb_x_ipsecrequest_mode));
1497 KEY_FREESP(&newsp);
1498 *error = EINVAL;
1499 return NULL;
1500 }
1501 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1502
1503 switch (xisr->sadb_x_ipsecrequest_level) {
1504 case IPSEC_LEVEL_DEFAULT:
1505 case IPSEC_LEVEL_USE:
1506 case IPSEC_LEVEL_REQUIRE:
1507 break;
1508 case IPSEC_LEVEL_UNIQUE:
1509 /* validity check */
1510 /*
1511 * If range violation of reqid, kernel will
1512 * update it, don't refuse it.
1513 */
1514 if (xisr->sadb_x_ipsecrequest_reqid
1515 > IPSEC_MANUAL_REQID_MAX) {
1516 ipseclog((LOG_DEBUG,
1517 "key_msg2sp: reqid=%d range "
1518 "violation, updated by kernel.\n",
1519 xisr->sadb_x_ipsecrequest_reqid));
1520 xisr->sadb_x_ipsecrequest_reqid = 0;
1521 }
1522
1523 /* allocate new reqid id if reqid is zero. */
1524 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1525 u_int16_t reqid;
1526 if ((reqid = key_newreqid()) == 0) {
1527 KEY_FREESP(&newsp);
1528 *error = ENOBUFS;
1529 return NULL;
1530 }
1531 (*p_isr)->saidx.reqid = reqid;
1532 xisr->sadb_x_ipsecrequest_reqid = reqid;
1533 } else {
1534 /* set it for manual keying. */
1535 (*p_isr)->saidx.reqid =
1536 xisr->sadb_x_ipsecrequest_reqid;
1537 }
1538 break;
1539
1540 default:
1541 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1542 xisr->sadb_x_ipsecrequest_level));
1543 KEY_FREESP(&newsp);
1544 *error = EINVAL;
1545 return NULL;
1546 }
1547 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1548
1549 /* set IP addresses if there */
1550 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1551 struct sockaddr *paddr;
1552
1553 paddr = (struct sockaddr *)(xisr + 1);
1554
1555 /* validity check */
1556 if (paddr->sa_len
1557 > sizeof((*p_isr)->saidx.src)) {
1558 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1559 "address length.\n"));
1560 KEY_FREESP(&newsp);
1561 *error = EINVAL;
1562 return NULL;
1563 }
1564 memcpy(&(*p_isr)->saidx.src, paddr, paddr->sa_len);
1565
1566 paddr = (struct sockaddr *)((char *)paddr
1567 + paddr->sa_len);
1568
1569 /* validity check */
1570 if (paddr->sa_len
1571 > sizeof((*p_isr)->saidx.dst)) {
1572 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1573 "address length.\n"));
1574 KEY_FREESP(&newsp);
1575 *error = EINVAL;
1576 return NULL;
1577 }
1578 memcpy(&(*p_isr)->saidx.dst, paddr, paddr->sa_len);
1579 }
1580
1581 (*p_isr)->sav = NULL;
1582 (*p_isr)->sp = newsp;
1583
1584 /* initialization for the next. */
1585 p_isr = &(*p_isr)->next;
1586 tlen -= xisr->sadb_x_ipsecrequest_len;
1587
1588 /* validity check */
1589 if (tlen < 0) {
1590 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1591 KEY_FREESP(&newsp);
1592 *error = EINVAL;
1593 return NULL;
1594 }
1595
1596 xisr = (struct sadb_x_ipsecrequest *)((char *)xisr
1597 + xisr->sadb_x_ipsecrequest_len);
1598 }
1599 }
1600 break;
1601 default:
1602 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1603 KEY_FREESP(&newsp);
1604 *error = EINVAL;
1605 return NULL;
1606 }
1607
1608 *error = 0;
1609 return newsp;
1610 }
1611
1612 static u_int16_t
1613 key_newreqid(void)
1614 {
1615 static u_int16_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1616
1617 auto_reqid = (auto_reqid == 0xffff
1618 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1619
1620 /* XXX should be unique check */
1621
1622 return auto_reqid;
1623 }
1624
1625 /*
1626 * copy secpolicy struct to sadb_x_policy structure indicated.
1627 */
1628 struct mbuf *
1629 key_sp2msg(struct secpolicy *sp)
1630 {
1631 struct sadb_x_policy *xpl;
1632 int tlen;
1633 char *p;
1634 struct mbuf *m;
1635
1636 /* sanity check. */
1637 if (sp == NULL)
1638 panic("key_sp2msg: NULL pointer was passed");
1639
1640 tlen = key_getspreqmsglen(sp);
1641
1642 m = key_alloc_mbuf(tlen);
1643 if (!m || m->m_next) { /*XXX*/
1644 if (m)
1645 m_freem(m);
1646 return NULL;
1647 }
1648
1649 m->m_len = tlen;
1650 m->m_next = NULL;
1651 xpl = mtod(m, struct sadb_x_policy *);
1652 memset(xpl, 0, tlen);
1653
1654 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1655 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1656 xpl->sadb_x_policy_type = sp->policy;
1657 xpl->sadb_x_policy_dir = sp->spidx.dir;
1658 xpl->sadb_x_policy_id = sp->id;
1659 p = (char *)xpl + sizeof(*xpl);
1660
1661 /* if is the policy for ipsec ? */
1662 if (sp->policy == IPSEC_POLICY_IPSEC) {
1663 struct sadb_x_ipsecrequest *xisr;
1664 struct ipsecrequest *isr;
1665
1666 for (isr = sp->req; isr != NULL; isr = isr->next) {
1667
1668 xisr = (struct sadb_x_ipsecrequest *)p;
1669
1670 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1671 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1672 xisr->sadb_x_ipsecrequest_level = isr->level;
1673 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1674
1675 p += sizeof(*xisr);
1676 memcpy(p, &isr->saidx.src, isr->saidx.src.sa.sa_len);
1677 p += isr->saidx.src.sa.sa_len;
1678 memcpy(p, &isr->saidx.dst, isr->saidx.dst.sa.sa_len);
1679 p += isr->saidx.src.sa.sa_len;
1680
1681 xisr->sadb_x_ipsecrequest_len =
1682 PFKEY_ALIGN8(sizeof(*xisr)
1683 + isr->saidx.src.sa.sa_len
1684 + isr->saidx.dst.sa.sa_len);
1685 }
1686 }
1687
1688 return m;
1689 }
1690
1691 /* m will not be freed nor modified */
1692 static struct mbuf *
1693 key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1694 int ndeep, int nitem, ...)
1695 {
1696 va_list ap;
1697 int idx;
1698 int i;
1699 struct mbuf *result = NULL, *n;
1700 int len;
1701
1702 if (m == NULL || mhp == NULL)
1703 panic("null pointer passed to key_gather");
1704
1705 va_start(ap, nitem);
1706 for (i = 0; i < nitem; i++) {
1707 idx = va_arg(ap, int);
1708 if (idx < 0 || idx > SADB_EXT_MAX)
1709 goto fail;
1710 /* don't attempt to pull empty extension */
1711 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1712 continue;
1713 if (idx != SADB_EXT_RESERVED &&
1714 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1715 continue;
1716
1717 if (idx == SADB_EXT_RESERVED) {
1718 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1719 #ifdef DIAGNOSTIC
1720 if (len > MHLEN)
1721 panic("assumption failed");
1722 #endif
1723 MGETHDR(n, M_DONTWAIT, MT_DATA);
1724 if (!n)
1725 goto fail;
1726 n->m_len = len;
1727 n->m_next = NULL;
1728 m_copydata(m, 0, sizeof(struct sadb_msg),
1729 mtod(n, void *));
1730 } else if (i < ndeep) {
1731 len = mhp->extlen[idx];
1732 n = key_alloc_mbuf(len);
1733 if (!n || n->m_next) { /*XXX*/
1734 if (n)
1735 m_freem(n);
1736 goto fail;
1737 }
1738 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1739 mtod(n, void *));
1740 } else {
1741 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
1742 M_DONTWAIT);
1743 }
1744 if (n == NULL)
1745 goto fail;
1746
1747 if (result)
1748 m_cat(result, n);
1749 else
1750 result = n;
1751 }
1752 va_end(ap);
1753
1754 if ((result->m_flags & M_PKTHDR) != 0) {
1755 result->m_pkthdr.len = 0;
1756 for (n = result; n; n = n->m_next)
1757 result->m_pkthdr.len += n->m_len;
1758 }
1759
1760 return result;
1761
1762 fail:
1763 va_end(ap);
1764 m_freem(result);
1765 return NULL;
1766 }
1767
1768 /*
1769 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1770 * add an entry to SP database, when received
1771 * <base, address(SD), (lifetime(H),) policy>
1772 * from the user(?).
1773 * Adding to SP database,
1774 * and send
1775 * <base, address(SD), (lifetime(H),) policy>
1776 * to the socket which was send.
1777 *
1778 * SPDADD set a unique policy entry.
1779 * SPDSETIDX like SPDADD without a part of policy requests.
1780 * SPDUPDATE replace a unique policy entry.
1781 *
1782 * m will always be freed.
1783 */
1784 static int
1785 key_spdadd(struct socket *so, struct mbuf *m,
1786 const struct sadb_msghdr *mhp)
1787 {
1788 struct sadb_address *src0, *dst0;
1789 struct sadb_x_policy *xpl0, *xpl;
1790 struct sadb_lifetime *lft = NULL;
1791 struct secpolicyindex spidx;
1792 struct secpolicy *newsp;
1793 int error;
1794
1795 /* sanity check */
1796 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1797 panic("key_spdadd: NULL pointer is passed");
1798
1799 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1800 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1801 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1802 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1803 return key_senderror(so, m, EINVAL);
1804 }
1805 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1806 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1807 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1808 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1809 return key_senderror(so, m, EINVAL);
1810 }
1811 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1812 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1813 < sizeof(struct sadb_lifetime)) {
1814 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1815 return key_senderror(so, m, EINVAL);
1816 }
1817 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1818 }
1819
1820 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1821 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1822 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1823
1824 /* make secindex */
1825 /* XXX boundary check against sa_len */
1826 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1827 src0 + 1,
1828 dst0 + 1,
1829 src0->sadb_address_prefixlen,
1830 dst0->sadb_address_prefixlen,
1831 src0->sadb_address_proto,
1832 &spidx);
1833
1834 /* checking the direciton. */
1835 switch (xpl0->sadb_x_policy_dir) {
1836 case IPSEC_DIR_INBOUND:
1837 case IPSEC_DIR_OUTBOUND:
1838 break;
1839 default:
1840 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1841 mhp->msg->sadb_msg_errno = EINVAL;
1842 return 0;
1843 }
1844
1845 /* check policy */
1846 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1847 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1848 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1849 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1850 return key_senderror(so, m, EINVAL);
1851 }
1852
1853 /* policy requests are mandatory when action is ipsec. */
1854 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1855 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1856 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1857 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1858 return key_senderror(so, m, EINVAL);
1859 }
1860
1861 /*
1862 * checking there is SP already or not.
1863 * SPDUPDATE doesn't depend on whether there is a SP or not.
1864 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1865 * then error.
1866 */
1867 newsp = key_getsp(&spidx);
1868 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1869 if (newsp) {
1870 key_sp_dead(newsp);
1871 key_sp_unlink(newsp); /* XXX jrs ordering */
1872 KEY_FREESP(&newsp);
1873 newsp = NULL;
1874 }
1875 } else {
1876 if (newsp != NULL) {
1877 KEY_FREESP(&newsp);
1878 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1879 return key_senderror(so, m, EEXIST);
1880 }
1881 }
1882
1883 /* allocation new SP entry */
1884 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1885 return key_senderror(so, m, error);
1886 }
1887
1888 if ((newsp->id = key_getnewspid()) == 0) {
1889 KFREE(newsp);
1890 return key_senderror(so, m, ENOBUFS);
1891 }
1892
1893 /* XXX boundary check against sa_len */
1894 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1895 src0 + 1,
1896 dst0 + 1,
1897 src0->sadb_address_prefixlen,
1898 dst0->sadb_address_prefixlen,
1899 src0->sadb_address_proto,
1900 &newsp->spidx);
1901
1902 /* sanity check on addr pair */
1903 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1904 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1905 KFREE(newsp);
1906 return key_senderror(so, m, EINVAL);
1907 }
1908 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1909 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1910 KFREE(newsp);
1911 return key_senderror(so, m, EINVAL);
1912 }
1913 #if 1
1914 if (newsp->req && newsp->req->saidx.src.sa.sa_family) {
1915 struct sockaddr *sa;
1916 sa = (struct sockaddr *)(src0 + 1);
1917 if (sa->sa_family != newsp->req->saidx.src.sa.sa_family) {
1918 KFREE(newsp);
1919 return key_senderror(so, m, EINVAL);
1920 }
1921 }
1922 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) {
1923 struct sockaddr *sa;
1924 sa = (struct sockaddr *)(dst0 + 1);
1925 if (sa->sa_family != newsp->req->saidx.dst.sa.sa_family) {
1926 KFREE(newsp);
1927 return key_senderror(so, m, EINVAL);
1928 }
1929 }
1930 #endif
1931
1932 newsp->created = time_second;
1933 newsp->lastused = newsp->created;
1934 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1935 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1936
1937 newsp->refcnt = 1; /* do not reclaim until I say I do */
1938 newsp->state = IPSEC_SPSTATE_ALIVE;
1939 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1940
1941 /* delete the entry in spacqtree */
1942 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1943 struct secspacq *spacq;
1944 if ((spacq = key_getspacq(&spidx)) != NULL) {
1945 /* reset counter in order to deletion by timehandler. */
1946 spacq->created = time_second;
1947 spacq->count = 0;
1948 }
1949 }
1950
1951 #if defined(__NetBSD__)
1952 /* Invalidate all cached SPD pointers in the PCBs. */
1953 ipsec_invalpcbcacheall();
1954
1955 #if defined(GATEWAY)
1956 /* Invalidate the ipflow cache, as well. */
1957 ipflow_invalidate_all(0);
1958 #ifdef INET6
1959 ip6flow_invalidate_all(0);
1960 #endif /* INET6 */
1961 #endif /* GATEWAY */
1962 #endif /* __NetBSD__ */
1963
1964 {
1965 struct mbuf *n, *mpolicy;
1966 struct sadb_msg *newmsg;
1967 int off;
1968
1969 /* create new sadb_msg to reply. */
1970 if (lft) {
1971 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1972 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1973 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1974 } else {
1975 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1976 SADB_X_EXT_POLICY,
1977 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1978 }
1979 if (!n)
1980 return key_senderror(so, m, ENOBUFS);
1981
1982 if (n->m_len < sizeof(*newmsg)) {
1983 n = m_pullup(n, sizeof(*newmsg));
1984 if (!n)
1985 return key_senderror(so, m, ENOBUFS);
1986 }
1987 newmsg = mtod(n, struct sadb_msg *);
1988 newmsg->sadb_msg_errno = 0;
1989 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1990
1991 off = 0;
1992 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1993 sizeof(*xpl), &off);
1994 if (mpolicy == NULL) {
1995 /* n is already freed */
1996 return key_senderror(so, m, ENOBUFS);
1997 }
1998 xpl = (struct sadb_x_policy *)(mtod(mpolicy, char *) + off);
1999 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
2000 m_freem(n);
2001 return key_senderror(so, m, EINVAL);
2002 }
2003 xpl->sadb_x_policy_id = newsp->id;
2004
2005 m_freem(m);
2006 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2007 }
2008 }
2009
2010 /*
2011 * get new policy id.
2012 * OUT:
2013 * 0: failure.
2014 * others: success.
2015 */
2016 static u_int32_t
2017 key_getnewspid(void)
2018 {
2019 u_int32_t newid = 0;
2020 int count = key_spi_trycnt; /* XXX */
2021 struct secpolicy *sp;
2022
2023 /* when requesting to allocate spi ranged */
2024 while (count--) {
2025 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
2026
2027 if ((sp = key_getspbyid(newid)) == NULL)
2028 break;
2029
2030 KEY_FREESP(&sp);
2031 }
2032
2033 if (count == 0 || newid == 0) {
2034 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
2035 return 0;
2036 }
2037
2038 return newid;
2039 }
2040
2041 /*
2042 * SADB_SPDDELETE processing
2043 * receive
2044 * <base, address(SD), policy(*)>
2045 * from the user(?), and set SADB_SASTATE_DEAD,
2046 * and send,
2047 * <base, address(SD), policy(*)>
2048 * to the ikmpd.
2049 * policy(*) including direction of policy.
2050 *
2051 * m will always be freed.
2052 */
2053 static int
2054 key_spddelete(struct socket *so, struct mbuf *m,
2055 const struct sadb_msghdr *mhp)
2056 {
2057 struct sadb_address *src0, *dst0;
2058 struct sadb_x_policy *xpl0;
2059 struct secpolicyindex spidx;
2060 struct secpolicy *sp;
2061
2062 /* sanity check */
2063 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2064 panic("key_spddelete: NULL pointer is passed");
2065
2066 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
2067 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
2068 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
2069 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
2070 return key_senderror(so, m, EINVAL);
2071 }
2072 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
2073 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
2074 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2075 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
2076 return key_senderror(so, m, EINVAL);
2077 }
2078
2079 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
2080 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
2081 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
2082
2083 /* make secindex */
2084 /* XXX boundary check against sa_len */
2085 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
2086 src0 + 1,
2087 dst0 + 1,
2088 src0->sadb_address_prefixlen,
2089 dst0->sadb_address_prefixlen,
2090 src0->sadb_address_proto,
2091 &spidx);
2092
2093 /* checking the direciton. */
2094 switch (xpl0->sadb_x_policy_dir) {
2095 case IPSEC_DIR_INBOUND:
2096 case IPSEC_DIR_OUTBOUND:
2097 break;
2098 default:
2099 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
2100 return key_senderror(so, m, EINVAL);
2101 }
2102
2103 /* Is there SP in SPD ? */
2104 if ((sp = key_getsp(&spidx)) == NULL) {
2105 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2106 return key_senderror(so, m, EINVAL);
2107 }
2108
2109 /* save policy id to buffer to be returned. */
2110 xpl0->sadb_x_policy_id = sp->id;
2111
2112 key_sp_dead(sp);
2113 key_sp_unlink(sp); /* XXX jrs ordering */
2114 KEY_FREESP(&sp); /* ref gained by key_getspbyid */
2115
2116 #if defined(__NetBSD__)
2117 /* Invalidate all cached SPD pointers in the PCBs. */
2118 ipsec_invalpcbcacheall();
2119
2120 /* We're deleting policy; no need to invalidate the ipflow cache. */
2121 #endif /* __NetBSD__ */
2122
2123 {
2124 struct mbuf *n;
2125 struct sadb_msg *newmsg;
2126
2127 /* create new sadb_msg to reply. */
2128 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2129 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2130 if (!n)
2131 return key_senderror(so, m, ENOBUFS);
2132
2133 newmsg = mtod(n, struct sadb_msg *);
2134 newmsg->sadb_msg_errno = 0;
2135 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2136
2137 m_freem(m);
2138 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2139 }
2140 }
2141
2142 /*
2143 * SADB_SPDDELETE2 processing
2144 * receive
2145 * <base, policy(*)>
2146 * from the user(?), and set SADB_SASTATE_DEAD,
2147 * and send,
2148 * <base, policy(*)>
2149 * to the ikmpd.
2150 * policy(*) including direction of policy.
2151 *
2152 * m will always be freed.
2153 */
2154 static int
2155 key_spddelete2(struct socket *so, struct mbuf *m,
2156 const struct sadb_msghdr *mhp)
2157 {
2158 u_int32_t id;
2159 struct secpolicy *sp;
2160
2161 /* sanity check */
2162 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2163 panic("key_spddelete2: NULL pointer is passed");
2164
2165 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2166 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2167 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2168 key_senderror(so, m, EINVAL);
2169 return 0;
2170 }
2171
2172 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2173
2174 /* Is there SP in SPD ? */
2175 if ((sp = key_getspbyid(id)) == NULL) {
2176 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2177 return key_senderror(so, m, EINVAL);
2178 }
2179
2180 key_sp_dead(sp);
2181 key_sp_unlink(sp); /* XXX jrs ordering */
2182 KEY_FREESP(&sp); /* ref gained by key_getsp */
2183 sp = NULL;
2184
2185 #if defined(__NetBSD__)
2186 /* Invalidate all cached SPD pointers in the PCBs. */
2187 ipsec_invalpcbcacheall();
2188
2189 /* We're deleting policy; no need to invalidate the ipflow cache. */
2190 #endif /* __NetBSD__ */
2191
2192 {
2193 struct mbuf *n, *nn;
2194 struct sadb_msg *newmsg;
2195 int off, len;
2196
2197 /* create new sadb_msg to reply. */
2198 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2199
2200 if (len > MCLBYTES)
2201 return key_senderror(so, m, ENOBUFS);
2202 MGETHDR(n, M_DONTWAIT, MT_DATA);
2203 if (n && len > MHLEN) {
2204 MCLGET(n, M_DONTWAIT);
2205 if ((n->m_flags & M_EXT) == 0) {
2206 m_freem(n);
2207 n = NULL;
2208 }
2209 }
2210 if (!n)
2211 return key_senderror(so, m, ENOBUFS);
2212
2213 n->m_len = len;
2214 n->m_next = NULL;
2215 off = 0;
2216
2217 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off);
2218 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2219
2220 #ifdef DIAGNOSTIC
2221 if (off != len)
2222 panic("length inconsistency in key_spddelete2");
2223 #endif
2224
2225 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
2226 mhp->extlen[SADB_X_EXT_POLICY], M_DONTWAIT);
2227 if (!n->m_next) {
2228 m_freem(n);
2229 return key_senderror(so, m, ENOBUFS);
2230 }
2231
2232 n->m_pkthdr.len = 0;
2233 for (nn = n; nn; nn = nn->m_next)
2234 n->m_pkthdr.len += nn->m_len;
2235
2236 newmsg = mtod(n, struct sadb_msg *);
2237 newmsg->sadb_msg_errno = 0;
2238 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2239
2240 m_freem(m);
2241 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2242 }
2243 }
2244
2245 /*
2246 * SADB_X_GET processing
2247 * receive
2248 * <base, policy(*)>
2249 * from the user(?),
2250 * and send,
2251 * <base, address(SD), policy>
2252 * to the ikmpd.
2253 * policy(*) including direction of policy.
2254 *
2255 * m will always be freed.
2256 */
2257 static int
2258 key_spdget(struct socket *so, struct mbuf *m,
2259 const struct sadb_msghdr *mhp)
2260 {
2261 u_int32_t id;
2262 struct secpolicy *sp;
2263 struct mbuf *n;
2264
2265 /* sanity check */
2266 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2267 panic("key_spdget: NULL pointer is passed");
2268
2269 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2270 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2271 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2272 return key_senderror(so, m, EINVAL);
2273 }
2274
2275 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2276
2277 /* Is there SP in SPD ? */
2278 if ((sp = key_getspbyid(id)) == NULL) {
2279 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2280 return key_senderror(so, m, ENOENT);
2281 }
2282
2283 n = key_setdumpsp(sp, SADB_X_SPDGET, mhp->msg->sadb_msg_seq,
2284 mhp->msg->sadb_msg_pid);
2285 KEY_FREESP(&sp); /* ref gained by key_getspbyid */
2286 if (n != NULL) {
2287 m_freem(m);
2288 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2289 } else
2290 return key_senderror(so, m, ENOBUFS);
2291 }
2292
2293 /*
2294 * SADB_X_SPDACQUIRE processing.
2295 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2296 * send
2297 * <base, policy(*)>
2298 * to KMD, and expect to receive
2299 * <base> with SADB_X_SPDACQUIRE if error occurred,
2300 * or
2301 * <base, policy>
2302 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2303 * policy(*) is without policy requests.
2304 *
2305 * 0 : succeed
2306 * others: error number
2307 */
2308 int
2309 key_spdacquire(struct secpolicy *sp)
2310 {
2311 struct mbuf *result = NULL, *m;
2312 struct secspacq *newspacq;
2313 int error;
2314
2315 /* sanity check */
2316 if (sp == NULL)
2317 panic("key_spdacquire: NULL pointer is passed");
2318 if (sp->req != NULL)
2319 panic("key_spdacquire: called but there is request");
2320 if (sp->policy != IPSEC_POLICY_IPSEC)
2321 panic("key_spdacquire: policy mismathed. IPsec is expected");
2322
2323 /* Get an entry to check whether sent message or not. */
2324 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2325 if (key_blockacq_count < newspacq->count) {
2326 /* reset counter and do send message. */
2327 newspacq->count = 0;
2328 } else {
2329 /* increment counter and do nothing. */
2330 newspacq->count++;
2331 return 0;
2332 }
2333 } else {
2334 /* make new entry for blocking to send SADB_ACQUIRE. */
2335 if ((newspacq = key_newspacq(&sp->spidx)) == NULL)
2336 return ENOBUFS;
2337
2338 /* add to acqtree */
2339 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2340 }
2341
2342 /* create new sadb_msg to reply. */
2343 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2344 if (!m) {
2345 error = ENOBUFS;
2346 goto fail;
2347 }
2348 result = m;
2349
2350 result->m_pkthdr.len = 0;
2351 for (m = result; m; m = m->m_next)
2352 result->m_pkthdr.len += m->m_len;
2353
2354 mtod(result, struct sadb_msg *)->sadb_msg_len =
2355 PFKEY_UNIT64(result->m_pkthdr.len);
2356
2357 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2358
2359 fail:
2360 if (result)
2361 m_freem(result);
2362 return error;
2363 }
2364
2365 /*
2366 * SADB_SPDFLUSH processing
2367 * receive
2368 * <base>
2369 * from the user, and free all entries in secpctree.
2370 * and send,
2371 * <base>
2372 * to the user.
2373 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2374 *
2375 * m will always be freed.
2376 */
2377 static int
2378 key_spdflush(struct socket *so, struct mbuf *m,
2379 const struct sadb_msghdr *mhp)
2380 {
2381 struct sadb_msg *newmsg;
2382 struct secpolicy *sp;
2383 u_int dir;
2384
2385 /* sanity check */
2386 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2387 panic("key_spdflush: NULL pointer is passed");
2388
2389 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2390 return key_senderror(so, m, EINVAL);
2391
2392 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2393 struct secpolicy * nextsp;
2394 for (sp = LIST_FIRST(&sptree[dir]);
2395 sp != NULL;
2396 sp = nextsp) {
2397
2398 nextsp = LIST_NEXT(sp, chain);
2399 if (sp->state == IPSEC_SPSTATE_DEAD)
2400 continue;
2401 key_sp_dead(sp);
2402 key_sp_unlink(sp);
2403 /* 'sp' dead; continue transfers to 'sp = nextsp' */
2404 continue;
2405 }
2406 }
2407
2408 #if defined(__NetBSD__)
2409 /* Invalidate all cached SPD pointers in the PCBs. */
2410 ipsec_invalpcbcacheall();
2411
2412 /* We're deleting policy; no need to invalidate the ipflow cache. */
2413 #endif /* __NetBSD__ */
2414
2415 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2416 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2417 return key_senderror(so, m, ENOBUFS);
2418 }
2419
2420 if (m->m_next)
2421 m_freem(m->m_next);
2422 m->m_next = NULL;
2423 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2424 newmsg = mtod(m, struct sadb_msg *);
2425 newmsg->sadb_msg_errno = 0;
2426 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2427
2428 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2429 }
2430
2431 static struct sockaddr key_src = {
2432 .sa_len = 2,
2433 .sa_family = PF_KEY,
2434 };
2435
2436 static struct mbuf *
2437 key_setspddump_chain(int *errorp, int *lenp, pid_t pid)
2438 {
2439 struct secpolicy *sp;
2440 int cnt;
2441 u_int dir;
2442 struct mbuf *m, *n, *prev;
2443 int totlen;
2444
2445 *lenp = 0;
2446
2447 /* search SPD entry and get buffer size. */
2448 cnt = 0;
2449 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2450 LIST_FOREACH(sp, &sptree[dir], chain) {
2451 cnt++;
2452 }
2453 }
2454
2455 if (cnt == 0) {
2456 *errorp = ENOENT;
2457 return (NULL);
2458 }
2459
2460 m = NULL;
2461 prev = m;
2462 totlen = 0;
2463 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2464 LIST_FOREACH(sp, &sptree[dir], chain) {
2465 --cnt;
2466 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid);
2467
2468 if (!n) {
2469 *errorp = ENOBUFS;
2470 if (m) m_freem(m);
2471 return (NULL);
2472 }
2473
2474 totlen += n->m_pkthdr.len;
2475 if (!m) {
2476 m = n;
2477 } else {
2478 prev->m_nextpkt = n;
2479 }
2480 prev = n;
2481 }
2482 }
2483
2484 *lenp = totlen;
2485 *errorp = 0;
2486 return (m);
2487 }
2488
2489 /*
2490 * SADB_SPDDUMP processing
2491 * receive
2492 * <base>
2493 * from the user, and dump all SP leaves
2494 * and send,
2495 * <base> .....
2496 * to the ikmpd.
2497 *
2498 * m will always be freed.
2499 */
2500 static int
2501 key_spddump(struct socket *so, struct mbuf *m0,
2502 const struct sadb_msghdr *mhp)
2503 {
2504 struct mbuf *n;
2505 int error, len;
2506 int ok, s;
2507 pid_t pid;
2508
2509 /* sanity check */
2510 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL)
2511 panic("key_spddump: NULL pointer is passed");
2512
2513
2514 pid = mhp->msg->sadb_msg_pid;
2515 /*
2516 * If the requestor has insufficient socket-buffer space
2517 * for the entire chain, nobody gets any response to the DUMP.
2518 * XXX For now, only the requestor ever gets anything.
2519 * Moreover, if the requestor has any space at all, they receive
2520 * the entire chain, otherwise the request is refused with ENOBUFS.
2521 */
2522 if (sbspace(&so->so_rcv) <= 0) {
2523 return key_senderror(so, m0, ENOBUFS);
2524 }
2525
2526 s = splsoftnet();
2527 n = key_setspddump_chain(&error, &len, pid);
2528 splx(s);
2529
2530 if (n == NULL) {
2531 return key_senderror(so, m0, ENOENT);
2532 }
2533 {
2534 uint64_t *ps = PFKEY_STAT_GETREF();
2535 ps[PFKEY_STAT_IN_TOTAL]++;
2536 ps[PFKEY_STAT_IN_BYTES] += len;
2537 PFKEY_STAT_PUTREF();
2538 }
2539
2540 /*
2541 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets.
2542 * The requestor receives either the entire chain, or an
2543 * error message with ENOBUFS.
2544 */
2545
2546 /*
2547 * sbappendchainwith record takes the chain of entries, one
2548 * packet-record per SPD entry, prepends the key_src sockaddr
2549 * to each packet-record, links the sockaddr mbufs into a new
2550 * list of records, then appends the entire resulting
2551 * list to the requesting socket.
2552 */
2553 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src,
2554 n, SB_PRIO_ONESHOT_OVERFLOW);
2555
2556 if (!ok) {
2557 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM);
2558 m_freem(n);
2559 return key_senderror(so, m0, ENOBUFS);
2560 }
2561
2562 m_freem(m0);
2563 return error;
2564 }
2565
2566 #ifdef IPSEC_NAT_T
2567 /*
2568 * SADB_X_NAT_T_NEW_MAPPING. Unused by racoon as of 2005/04/23
2569 */
2570 static int
2571 key_nat_map(struct socket *so, struct mbuf *m,
2572 const struct sadb_msghdr *mhp)
2573 {
2574 struct sadb_x_nat_t_type *type;
2575 struct sadb_x_nat_t_port *sport;
2576 struct sadb_x_nat_t_port *dport;
2577 struct sadb_address *addr;
2578 struct sadb_x_nat_t_frag *frag;
2579
2580 /* sanity check */
2581 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2582 panic("key_nat_map: NULL pointer is passed.");
2583
2584 if (mhp->ext[SADB_X_EXT_NAT_T_TYPE] == NULL ||
2585 mhp->ext[SADB_X_EXT_NAT_T_SPORT] == NULL ||
2586 mhp->ext[SADB_X_EXT_NAT_T_DPORT] == NULL) {
2587 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n"));
2588 return key_senderror(so, m, EINVAL);
2589 }
2590 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) ||
2591 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) ||
2592 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) {
2593 ipseclog((LOG_DEBUG, "key_nat_map: invalid message.\n"));
2594 return key_senderror(so, m, EINVAL);
2595 }
2596
2597 if ((mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) &&
2598 (mhp->extlen[SADB_X_EXT_NAT_T_OA] < sizeof(*addr))) {
2599 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n"));
2600 return key_senderror(so, m, EINVAL);
2601 }
2602
2603 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) &&
2604 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) {
2605 ipseclog((LOG_DEBUG, "key_nat_map: invalid message\n"));
2606 return key_senderror(so, m, EINVAL);
2607 }
2608
2609 type = (struct sadb_x_nat_t_type *)mhp->ext[SADB_X_EXT_NAT_T_TYPE];
2610 sport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_SPORT];
2611 dport = (struct sadb_x_nat_t_port *)mhp->ext[SADB_X_EXT_NAT_T_DPORT];
2612 addr = (struct sadb_address *)mhp->ext[SADB_X_EXT_NAT_T_OA];
2613 frag = (struct sadb_x_nat_t_frag *) mhp->ext[SADB_X_EXT_NAT_T_FRAG];
2614
2615 printf("sadb_nat_map called\n");
2616
2617 /*
2618 * XXX handle that, it should also contain a SA, or anything
2619 * that enable to update the SA information.
2620 */
2621
2622 return 0;
2623 }
2624 #endif /* IPSEC_NAT_T */
2625
2626 static struct mbuf *
2627 key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq, pid_t pid)
2628 {
2629 struct mbuf *result = NULL, *m;
2630
2631 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2632 if (!m)
2633 goto fail;
2634 result = m;
2635
2636 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2637 &sp->spidx.src.sa, sp->spidx.prefs,
2638 sp->spidx.ul_proto);
2639 if (!m)
2640 goto fail;
2641 m_cat(result, m);
2642
2643 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2644 &sp->spidx.dst.sa, sp->spidx.prefd,
2645 sp->spidx.ul_proto);
2646 if (!m)
2647 goto fail;
2648 m_cat(result, m);
2649
2650 m = key_sp2msg(sp);
2651 if (!m)
2652 goto fail;
2653 m_cat(result, m);
2654
2655 if ((result->m_flags & M_PKTHDR) == 0)
2656 goto fail;
2657
2658 if (result->m_len < sizeof(struct sadb_msg)) {
2659 result = m_pullup(result, sizeof(struct sadb_msg));
2660 if (result == NULL)
2661 goto fail;
2662 }
2663
2664 result->m_pkthdr.len = 0;
2665 for (m = result; m; m = m->m_next)
2666 result->m_pkthdr.len += m->m_len;
2667
2668 mtod(result, struct sadb_msg *)->sadb_msg_len =
2669 PFKEY_UNIT64(result->m_pkthdr.len);
2670
2671 return result;
2672
2673 fail:
2674 m_freem(result);
2675 return NULL;
2676 }
2677
2678 /*
2679 * get PFKEY message length for security policy and request.
2680 */
2681 static u_int
2682 key_getspreqmsglen(struct secpolicy *sp)
2683 {
2684 u_int tlen;
2685
2686 tlen = sizeof(struct sadb_x_policy);
2687
2688 /* if is the policy for ipsec ? */
2689 if (sp->policy != IPSEC_POLICY_IPSEC)
2690 return tlen;
2691
2692 /* get length of ipsec requests */
2693 {
2694 struct ipsecrequest *isr;
2695 int len;
2696
2697 for (isr = sp->req; isr != NULL; isr = isr->next) {
2698 len = sizeof(struct sadb_x_ipsecrequest)
2699 + isr->saidx.src.sa.sa_len
2700 + isr->saidx.dst.sa.sa_len;
2701
2702 tlen += PFKEY_ALIGN8(len);
2703 }
2704 }
2705
2706 return tlen;
2707 }
2708
2709 /*
2710 * SADB_SPDEXPIRE processing
2711 * send
2712 * <base, address(SD), lifetime(CH), policy>
2713 * to KMD by PF_KEY.
2714 *
2715 * OUT: 0 : succeed
2716 * others : error number
2717 */
2718 static int
2719 key_spdexpire(struct secpolicy *sp)
2720 {
2721 int s;
2722 struct mbuf *result = NULL, *m;
2723 int len;
2724 int error = -1;
2725 struct sadb_lifetime *lt;
2726
2727 /* XXX: Why do we lock ? */
2728 s = splsoftnet(); /*called from softclock()*/
2729
2730 /* sanity check */
2731 if (sp == NULL)
2732 panic("key_spdexpire: NULL pointer is passed");
2733
2734 /* set msg header */
2735 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2736 if (!m) {
2737 error = ENOBUFS;
2738 goto fail;
2739 }
2740 result = m;
2741
2742 /* create lifetime extension (current and hard) */
2743 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2744 m = key_alloc_mbuf(len);
2745 if (!m || m->m_next) { /*XXX*/
2746 if (m)
2747 m_freem(m);
2748 error = ENOBUFS;
2749 goto fail;
2750 }
2751 memset(mtod(m, void *), 0, len);
2752 lt = mtod(m, struct sadb_lifetime *);
2753 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2754 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2755 lt->sadb_lifetime_allocations = 0;
2756 lt->sadb_lifetime_bytes = 0;
2757 lt->sadb_lifetime_addtime = sp->created;
2758 lt->sadb_lifetime_usetime = sp->lastused;
2759 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2);
2760 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2761 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2762 lt->sadb_lifetime_allocations = 0;
2763 lt->sadb_lifetime_bytes = 0;
2764 lt->sadb_lifetime_addtime = sp->lifetime;
2765 lt->sadb_lifetime_usetime = sp->validtime;
2766 m_cat(result, m);
2767
2768 /* set sadb_address for source */
2769 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2770 &sp->spidx.src.sa,
2771 sp->spidx.prefs, sp->spidx.ul_proto);
2772 if (!m) {
2773 error = ENOBUFS;
2774 goto fail;
2775 }
2776 m_cat(result, m);
2777
2778 /* set sadb_address for destination */
2779 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2780 &sp->spidx.dst.sa,
2781 sp->spidx.prefd, sp->spidx.ul_proto);
2782 if (!m) {
2783 error = ENOBUFS;
2784 goto fail;
2785 }
2786 m_cat(result, m);
2787
2788 /* set secpolicy */
2789 m = key_sp2msg(sp);
2790 if (!m) {
2791 error = ENOBUFS;
2792 goto fail;
2793 }
2794 m_cat(result, m);
2795
2796 if ((result->m_flags & M_PKTHDR) == 0) {
2797 error = EINVAL;
2798 goto fail;
2799 }
2800
2801 if (result->m_len < sizeof(struct sadb_msg)) {
2802 result = m_pullup(result, sizeof(struct sadb_msg));
2803 if (result == NULL) {
2804 error = ENOBUFS;
2805 goto fail;
2806 }
2807 }
2808
2809 result->m_pkthdr.len = 0;
2810 for (m = result; m; m = m->m_next)
2811 result->m_pkthdr.len += m->m_len;
2812
2813 mtod(result, struct sadb_msg *)->sadb_msg_len =
2814 PFKEY_UNIT64(result->m_pkthdr.len);
2815
2816 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2817
2818 fail:
2819 if (result)
2820 m_freem(result);
2821 splx(s);
2822 return error;
2823 }
2824
2825 /* %%% SAD management */
2826 /*
2827 * allocating a memory for new SA head, and copy from the values of mhp.
2828 * OUT: NULL : failure due to the lack of memory.
2829 * others : pointer to new SA head.
2830 */
2831 static struct secashead *
2832 key_newsah(struct secasindex *saidx)
2833 {
2834 struct secashead *newsah;
2835
2836 IPSEC_ASSERT(saidx != NULL, ("key_newsaidx: null saidx"));
2837
2838 newsah = (struct secashead *)
2839 malloc(sizeof(struct secashead), M_SECA, M_NOWAIT|M_ZERO);
2840 if (newsah != NULL) {
2841 int i;
2842 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++)
2843 LIST_INIT(&newsah->savtree[i]);
2844 newsah->saidx = *saidx;
2845
2846 /* add to saidxtree */
2847 newsah->state = SADB_SASTATE_MATURE;
2848 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2849 }
2850 return(newsah);
2851 }
2852
2853 /*
2854 * delete SA index and all SA registerd.
2855 */
2856 static void
2857 key_delsah(struct secashead *sah)
2858 {
2859 struct secasvar *sav, *nextsav;
2860 u_int stateidx, state;
2861 int s;
2862 int zombie = 0;
2863
2864 /* sanity check */
2865 if (sah == NULL)
2866 panic("key_delsah: NULL pointer is passed");
2867
2868 s = splsoftnet(); /*called from softclock()*/
2869
2870 /* searching all SA registerd in the secindex. */
2871 for (stateidx = 0;
2872 stateidx < _ARRAYLEN(saorder_state_any);
2873 stateidx++) {
2874
2875 state = saorder_state_any[stateidx];
2876 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2877 sav != NULL;
2878 sav = nextsav) {
2879
2880 nextsav = LIST_NEXT(sav, chain);
2881
2882 if (sav->refcnt == 0) {
2883 /* sanity check */
2884 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2885 KEY_FREESAV(&sav);
2886 } else {
2887 /* give up to delete this sa */
2888 zombie++;
2889 }
2890 }
2891 }
2892
2893 /* don't delete sah only if there are savs. */
2894 if (zombie) {
2895 splx(s);
2896 return;
2897 }
2898
2899 rtcache_free(&sah->sa_route);
2900
2901 /* remove from tree of SA index */
2902 if (__LIST_CHAINED(sah))
2903 LIST_REMOVE(sah, chain);
2904
2905 KFREE(sah);
2906
2907 splx(s);
2908 return;
2909 }
2910
2911 /*
2912 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2913 * and copy the values of mhp into new buffer.
2914 * When SAD message type is GETSPI:
2915 * to set sequence number from acq_seq++,
2916 * to set zero to SPI.
2917 * not to call key_setsava().
2918 * OUT: NULL : fail
2919 * others : pointer to new secasvar.
2920 *
2921 * does not modify mbuf. does not free mbuf on error.
2922 */
2923 static struct secasvar *
2924 key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
2925 struct secashead *sah, int *errp,
2926 const char* where, int tag)
2927 {
2928 struct secasvar *newsav;
2929 const struct sadb_sa *xsa;
2930
2931 /* sanity check */
2932 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2933 panic("key_newsa: NULL pointer is passed");
2934
2935 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2936 if (newsav == NULL) {
2937 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2938 *errp = ENOBUFS;
2939 goto done;
2940 }
2941 memset(newsav, 0, sizeof(struct secasvar));
2942
2943 switch (mhp->msg->sadb_msg_type) {
2944 case SADB_GETSPI:
2945 newsav->spi = 0;
2946
2947 #ifdef IPSEC_DOSEQCHECK
2948 /* sync sequence number */
2949 if (mhp->msg->sadb_msg_seq == 0)
2950 newsav->seq =
2951 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2952 else
2953 #endif
2954 newsav->seq = mhp->msg->sadb_msg_seq;
2955 break;
2956
2957 case SADB_ADD:
2958 /* sanity check */
2959 if (mhp->ext[SADB_EXT_SA] == NULL) {
2960 KFREE(newsav), newsav = NULL;
2961 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2962 *errp = EINVAL;
2963 goto done;
2964 }
2965 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2966 newsav->spi = xsa->sadb_sa_spi;
2967 newsav->seq = mhp->msg->sadb_msg_seq;
2968 break;
2969 default:
2970 KFREE(newsav), newsav = NULL;
2971 *errp = EINVAL;
2972 goto done;
2973 }
2974
2975 /* copy sav values */
2976 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2977 *errp = key_setsaval(newsav, m, mhp);
2978 if (*errp) {
2979 KFREE(newsav), newsav = NULL;
2980 goto done;
2981 }
2982 }
2983
2984 /* reset created */
2985 newsav->created = time_second;
2986 newsav->pid = mhp->msg->sadb_msg_pid;
2987
2988 /* add to satree */
2989 newsav->sah = sah;
2990 newsav->refcnt = 1;
2991 newsav->state = SADB_SASTATE_LARVAL;
2992 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2993 secasvar, chain);
2994 done:
2995 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
2996 printf("DP key_newsav from %s:%u return SP:%p\n",
2997 where, tag, newsav));
2998
2999 return newsav;
3000 }
3001
3002 /*
3003 * free() SA variable entry.
3004 */
3005 static void
3006 key_delsav(struct secasvar *sav)
3007 {
3008 IPSEC_ASSERT(sav != NULL, ("key_delsav: null sav"));
3009 IPSEC_ASSERT(sav->refcnt == 0,
3010 ("key_delsav: reference count %u > 0", sav->refcnt));
3011
3012 /* remove from SA header */
3013 if (__LIST_CHAINED(sav))
3014 LIST_REMOVE(sav, chain);
3015
3016 /*
3017 * Cleanup xform state. Note that zeroize'ing causes the
3018 * keys to be cleared; otherwise we must do it ourself.
3019 */
3020 if (sav->tdb_xform != NULL) {
3021 sav->tdb_xform->xf_zeroize(sav);
3022 sav->tdb_xform = NULL;
3023 } else {
3024 if (sav->key_auth != NULL)
3025 memset(_KEYBUF(sav->key_auth), 0, _KEYLEN(sav->key_auth));
3026 if (sav->key_enc != NULL)
3027 memset(_KEYBUF(sav->key_enc), 0, _KEYLEN(sav->key_enc));
3028 }
3029 if (sav->key_auth != NULL) {
3030 KFREE(sav->key_auth);
3031 sav->key_auth = NULL;
3032 }
3033 if (sav->key_enc != NULL) {
3034 KFREE(sav->key_enc);
3035 sav->key_enc = NULL;
3036 }
3037 if (sav->sched) {
3038 memset(sav->sched, 0, sav->schedlen);
3039 KFREE(sav->sched);
3040 sav->sched = NULL;
3041 }
3042 if (sav->replay != NULL) {
3043 KFREE(sav->replay);
3044 sav->replay = NULL;
3045 }
3046 if (sav->lft_c != NULL) {
3047 KFREE(sav->lft_c);
3048 sav->lft_c = NULL;
3049 }
3050 if (sav->lft_h != NULL) {
3051 KFREE(sav->lft_h);
3052 sav->lft_h = NULL;
3053 }
3054 if (sav->lft_s != NULL) {
3055 KFREE(sav->lft_s);
3056 sav->lft_s = NULL;
3057 }
3058 if (sav->iv != NULL) {
3059 KFREE(sav->iv);
3060 sav->iv = NULL;
3061 }
3062
3063 KFREE(sav);
3064
3065 return;
3066 }
3067
3068 /*
3069 * search SAD.
3070 * OUT:
3071 * NULL : not found
3072 * others : found, pointer to a SA.
3073 */
3074 static struct secashead *
3075 key_getsah(struct secasindex *saidx)
3076 {
3077 struct secashead *sah;
3078
3079 LIST_FOREACH(sah, &sahtree, chain) {
3080 if (sah->state == SADB_SASTATE_DEAD)
3081 continue;
3082 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
3083 return sah;
3084 }
3085
3086 return NULL;
3087 }
3088
3089 /*
3090 * check not to be duplicated SPI.
3091 * NOTE: this function is too slow due to searching all SAD.
3092 * OUT:
3093 * NULL : not found
3094 * others : found, pointer to a SA.
3095 */
3096 static struct secasvar *
3097 key_checkspidup(struct secasindex *saidx, u_int32_t spi)
3098 {
3099 struct secashead *sah;
3100 struct secasvar *sav;
3101
3102 /* check address family */
3103 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) {
3104 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
3105 return NULL;
3106 }
3107
3108 /* check all SAD */
3109 LIST_FOREACH(sah, &sahtree, chain) {
3110 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
3111 continue;
3112 sav = key_getsavbyspi(sah, spi);
3113 if (sav != NULL)
3114 return sav;
3115 }
3116
3117 return NULL;
3118 }
3119
3120 /*
3121 * search SAD litmited alive SA, protocol, SPI.
3122 * OUT:
3123 * NULL : not found
3124 * others : found, pointer to a SA.
3125 */
3126 static struct secasvar *
3127 key_getsavbyspi(struct secashead *sah, u_int32_t spi)
3128 {
3129 struct secasvar *sav;
3130 u_int stateidx, state;
3131
3132 /* search all status */
3133 for (stateidx = 0;
3134 stateidx < _ARRAYLEN(saorder_state_alive);
3135 stateidx++) {
3136
3137 state = saorder_state_alive[stateidx];
3138 LIST_FOREACH(sav, &sah->savtree[state], chain) {
3139
3140 /* sanity check */
3141 if (sav->state != state) {
3142 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
3143 "invalid sav->state (queue: %d SA: %d)\n",
3144 state, sav->state));
3145 continue;
3146 }
3147
3148 if (sav->spi == spi)
3149 return sav;
3150 }
3151 }
3152
3153 return NULL;
3154 }
3155
3156 /*
3157 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
3158 * You must update these if need.
3159 * OUT: 0: success.
3160 * !0: failure.
3161 *
3162 * does not modify mbuf. does not free mbuf on error.
3163 */
3164 static int
3165 key_setsaval(struct secasvar *sav, struct mbuf *m,
3166 const struct sadb_msghdr *mhp)
3167 {
3168 int error = 0;
3169
3170 /* sanity check */
3171 if (m == NULL || mhp == NULL || mhp->msg == NULL)
3172 panic("key_setsaval: NULL pointer is passed");
3173
3174 /* initialization */
3175 sav->replay = NULL;
3176 sav->key_auth = NULL;
3177 sav->key_enc = NULL;
3178 sav->sched = NULL;
3179 sav->schedlen = 0;
3180 sav->iv = NULL;
3181 sav->lft_c = NULL;
3182 sav->lft_h = NULL;
3183 sav->lft_s = NULL;
3184 sav->tdb_xform = NULL; /* transform */
3185 sav->tdb_encalgxform = NULL; /* encoding algorithm */
3186 sav->tdb_authalgxform = NULL; /* authentication algorithm */
3187 sav->tdb_compalgxform = NULL; /* compression algorithm */
3188 #ifdef IPSEC_NAT_T
3189 sav->natt_type = 0;
3190 sav->esp_frag = 0;
3191 #endif
3192
3193 /* SA */
3194 if (mhp->ext[SADB_EXT_SA] != NULL) {
3195 const struct sadb_sa *sa0;
3196
3197 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
3198 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
3199 error = EINVAL;
3200 goto fail;
3201 }
3202
3203 sav->alg_auth = sa0->sadb_sa_auth;
3204 sav->alg_enc = sa0->sadb_sa_encrypt;
3205 sav->flags = sa0->sadb_sa_flags;
3206
3207 /* replay window */
3208 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
3209 sav->replay = (struct secreplay *)
3210 malloc(sizeof(struct secreplay)+sa0->sadb_sa_replay, M_SECA, M_NOWAIT|M_ZERO);
3211 if (sav->replay == NULL) {
3212 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3213 error = ENOBUFS;
3214 goto fail;
3215 }
3216 if (sa0->sadb_sa_replay != 0)
3217 sav->replay->bitmap = (char*)(sav->replay+1);
3218 sav->replay->wsize = sa0->sadb_sa_replay;
3219 }
3220 }
3221
3222 /* Authentication keys */
3223 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
3224 const struct sadb_key *key0;
3225 int len;
3226
3227 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
3228 len = mhp->extlen[SADB_EXT_KEY_AUTH];
3229
3230 error = 0;
3231 if (len < sizeof(*key0)) {
3232 error = EINVAL;
3233 goto fail;
3234 }
3235 switch (mhp->msg->sadb_msg_satype) {
3236 case SADB_SATYPE_AH:
3237 case SADB_SATYPE_ESP:
3238 case SADB_X_SATYPE_TCPSIGNATURE:
3239 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3240 sav->alg_auth != SADB_X_AALG_NULL)
3241 error = EINVAL;
3242 break;
3243 case SADB_X_SATYPE_IPCOMP:
3244 default:
3245 error = EINVAL;
3246 break;
3247 }
3248 if (error) {
3249 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
3250 goto fail;
3251 }
3252
3253 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
3254 if (sav->key_auth == NULL) {
3255 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3256 error = ENOBUFS;
3257 goto fail;
3258 }
3259 }
3260
3261 /* Encryption key */
3262 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
3263 const struct sadb_key *key0;
3264 int len;
3265
3266 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
3267 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
3268
3269 error = 0;
3270 if (len < sizeof(*key0)) {
3271 error = EINVAL;
3272 goto fail;
3273 }
3274 switch (mhp->msg->sadb_msg_satype) {
3275 case SADB_SATYPE_ESP:
3276 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
3277 sav->alg_enc != SADB_EALG_NULL) {
3278 error = EINVAL;
3279 break;
3280 }
3281 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
3282 if (sav->key_enc == NULL) {
3283 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3284 error = ENOBUFS;
3285 goto fail;
3286 }
3287 break;
3288 case SADB_X_SATYPE_IPCOMP:
3289 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
3290 error = EINVAL;
3291 sav->key_enc = NULL; /*just in case*/
3292 break;
3293 case SADB_SATYPE_AH:
3294 case SADB_X_SATYPE_TCPSIGNATURE:
3295 default:
3296 error = EINVAL;
3297 break;
3298 }
3299 if (error) {
3300 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3301 goto fail;
3302 }
3303 }
3304
3305 /* set iv */
3306 sav->ivlen = 0;
3307
3308 switch (mhp->msg->sadb_msg_satype) {
3309 case SADB_SATYPE_AH:
3310 error = xform_init(sav, XF_AH);
3311 break;
3312 case SADB_SATYPE_ESP:
3313 error = xform_init(sav, XF_ESP);
3314 break;
3315 case SADB_X_SATYPE_IPCOMP:
3316 error = xform_init(sav, XF_IPCOMP);
3317 break;
3318 case SADB_X_SATYPE_TCPSIGNATURE:
3319 error = xform_init(sav, XF_TCPSIGNATURE);
3320 break;
3321 }
3322 if (error) {
3323 ipseclog((LOG_DEBUG,
3324 "key_setsaval: unable to initialize SA type %u.\n",
3325 mhp->msg->sadb_msg_satype));
3326 goto fail;
3327 }
3328
3329 /* reset created */
3330 sav->created = time_second;
3331
3332 /* make lifetime for CURRENT */
3333 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3334 sizeof(struct sadb_lifetime));
3335 if (sav->lft_c == NULL) {
3336 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3337 error = ENOBUFS;
3338 goto fail;
3339 }
3340
3341 sav->lft_c->sadb_lifetime_len =
3342 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3343 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3344 sav->lft_c->sadb_lifetime_allocations = 0;
3345 sav->lft_c->sadb_lifetime_bytes = 0;
3346 sav->lft_c->sadb_lifetime_addtime = time_second;
3347 sav->lft_c->sadb_lifetime_usetime = 0;
3348
3349 /* lifetimes for HARD and SOFT */
3350 {
3351 const struct sadb_lifetime *lft0;
3352
3353 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3354 if (lft0 != NULL) {
3355 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3356 error = EINVAL;
3357 goto fail;
3358 }
3359 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3360 sizeof(*lft0));
3361 if (sav->lft_h == NULL) {
3362 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3363 error = ENOBUFS;
3364 goto fail;
3365 }
3366 /* to be initialize ? */
3367 }
3368
3369 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3370 if (lft0 != NULL) {
3371 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3372 error = EINVAL;
3373 goto fail;
3374 }
3375 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3376 sizeof(*lft0));
3377 if (sav->lft_s == NULL) {
3378 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3379 error = ENOBUFS;
3380 goto fail;
3381 }
3382 /* to be initialize ? */
3383 }
3384 }
3385
3386 return 0;
3387
3388 fail:
3389 /* initialization */
3390 if (sav->replay != NULL) {
3391 KFREE(sav->replay);
3392 sav->replay = NULL;
3393 }
3394 if (sav->key_auth != NULL) {
3395 KFREE(sav->key_auth);
3396 sav->key_auth = NULL;
3397 }
3398 if (sav->key_enc != NULL) {
3399 KFREE(sav->key_enc);
3400 sav->key_enc = NULL;
3401 }
3402 if (sav->sched) {
3403 KFREE(sav->sched);
3404 sav->sched = NULL;
3405 }
3406 if (sav->iv != NULL) {
3407 KFREE(sav->iv);
3408 sav->iv = NULL;
3409 }
3410 if (sav->lft_c != NULL) {
3411 KFREE(sav->lft_c);
3412 sav->lft_c = NULL;
3413 }
3414 if (sav->lft_h != NULL) {
3415 KFREE(sav->lft_h);
3416 sav->lft_h = NULL;
3417 }
3418 if (sav->lft_s != NULL) {
3419 KFREE(sav->lft_s);
3420 sav->lft_s = NULL;
3421 }
3422
3423 return error;
3424 }
3425
3426 /*
3427 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3428 * OUT: 0: valid
3429 * other: errno
3430 */
3431 static int
3432 key_mature(struct secasvar *sav)
3433 {
3434 int error;
3435
3436 /* check SPI value */
3437 switch (sav->sah->saidx.proto) {
3438 case IPPROTO_ESP:
3439 case IPPROTO_AH:
3440 if (ntohl(sav->spi) <= 255) {
3441 ipseclog((LOG_DEBUG,
3442 "key_mature: illegal range of SPI %u.\n",
3443 (u_int32_t)ntohl(sav->spi)));
3444 return EINVAL;
3445 }
3446 break;
3447 }
3448
3449 /* check satype */
3450 switch (sav->sah->saidx.proto) {
3451 case IPPROTO_ESP:
3452 /* check flags */
3453 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) ==
3454 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) {
3455 ipseclog((LOG_DEBUG, "key_mature: "
3456 "invalid flag (derived) given to old-esp.\n"));
3457 return EINVAL;
3458 }
3459 error = xform_init(sav, XF_ESP);
3460 break;
3461 case IPPROTO_AH:
3462 /* check flags */
3463 if (sav->flags & SADB_X_EXT_DERIV) {
3464 ipseclog((LOG_DEBUG, "key_mature: "
3465 "invalid flag (derived) given to AH SA.\n"));
3466 return EINVAL;
3467 }
3468 if (sav->alg_enc != SADB_EALG_NONE) {
3469 ipseclog((LOG_DEBUG, "key_mature: "
3470 "protocol and algorithm mismated.\n"));
3471 return(EINVAL);
3472 }
3473 error = xform_init(sav, XF_AH);
3474 break;
3475 case IPPROTO_IPCOMP:
3476 if (sav->alg_auth != SADB_AALG_NONE) {
3477 ipseclog((LOG_DEBUG, "key_mature: "
3478 "protocol and algorithm mismated.\n"));
3479 return(EINVAL);
3480 }
3481 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3482 && ntohl(sav->spi) >= 0x10000) {
3483 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3484 return(EINVAL);
3485 }
3486 error = xform_init(sav, XF_IPCOMP);
3487 break;
3488 case IPPROTO_TCP:
3489 if (sav->alg_enc != SADB_EALG_NONE) {
3490 ipseclog((LOG_DEBUG, "%s: protocol and algorithm "
3491 "mismated.\n", __func__));
3492 return(EINVAL);
3493 }
3494 error = xform_init(sav, XF_TCPSIGNATURE);
3495 break;
3496 default:
3497 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3498 error = EPROTONOSUPPORT;
3499 break;
3500 }
3501 if (error == 0)
3502 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3503 return (error);
3504 }
3505
3506 /*
3507 * subroutine for SADB_GET and SADB_DUMP.
3508 */
3509 static struct mbuf *
3510 key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3511 u_int32_t seq, u_int32_t pid)
3512 {
3513 struct mbuf *result = NULL, *tres = NULL, *m;
3514 int l = 0;
3515 int i;
3516 void *p;
3517 int dumporder[] = {
3518 SADB_EXT_SA, SADB_X_EXT_SA2,
3519 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3520 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3521 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3522 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3523 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3524 #ifdef IPSEC_NAT_T
3525 SADB_X_EXT_NAT_T_TYPE, SADB_X_EXT_NAT_T_SPORT,
3526 SADB_X_EXT_NAT_T_DPORT, SADB_X_EXT_NAT_T_OA,
3527 SADB_X_EXT_NAT_T_FRAG,
3528 #endif
3529
3530 };
3531
3532 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3533 if (m == NULL)
3534 goto fail;
3535 result = m;
3536
3537 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3538 m = NULL;
3539 p = NULL;
3540 switch (dumporder[i]) {
3541 case SADB_EXT_SA:
3542 m = key_setsadbsa(sav);
3543 if (!m)
3544 goto fail;
3545 break;
3546
3547 case SADB_X_EXT_SA2:
3548 m = key_setsadbxsa2(sav->sah->saidx.mode,
3549 sav->replay ? sav->replay->count : 0,
3550 sav->sah->saidx.reqid);
3551 if (!m)
3552 goto fail;
3553 break;
3554
3555 case SADB_EXT_ADDRESS_SRC:
3556 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3557 &sav->sah->saidx.src.sa,
3558 FULLMASK, IPSEC_ULPROTO_ANY);
3559 if (!m)
3560 goto fail;
3561 break;
3562
3563 case SADB_EXT_ADDRESS_DST:
3564 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3565 &sav->sah->saidx.dst.sa,
3566 FULLMASK, IPSEC_ULPROTO_ANY);
3567 if (!m)
3568 goto fail;
3569 break;
3570
3571 case SADB_EXT_KEY_AUTH:
3572 if (!sav->key_auth)
3573 continue;
3574 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3575 p = sav->key_auth;
3576 break;
3577
3578 case SADB_EXT_KEY_ENCRYPT:
3579 if (!sav->key_enc)
3580 continue;
3581 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3582 p = sav->key_enc;
3583 break;
3584
3585 case SADB_EXT_LIFETIME_CURRENT:
3586 if (!sav->lft_c)
3587 continue;
3588 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3589 p = sav->lft_c;
3590 break;
3591
3592 case SADB_EXT_LIFETIME_HARD:
3593 if (!sav->lft_h)
3594 continue;
3595 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3596 p = sav->lft_h;
3597 break;
3598
3599 case SADB_EXT_LIFETIME_SOFT:
3600 if (!sav->lft_s)
3601 continue;
3602 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3603 p = sav->lft_s;
3604 break;
3605
3606 #ifdef IPSEC_NAT_T
3607 case SADB_X_EXT_NAT_T_TYPE:
3608 if ((m = key_setsadbxtype(sav->natt_type)) == NULL)
3609 goto fail;
3610 break;
3611
3612 case SADB_X_EXT_NAT_T_DPORT:
3613 if ((m = key_setsadbxport(
3614 key_portfromsaddr(&sav->sah->saidx.dst),
3615 SADB_X_EXT_NAT_T_DPORT)) == NULL)
3616 goto fail;
3617 break;
3618
3619 case SADB_X_EXT_NAT_T_SPORT:
3620 if ((m = key_setsadbxport(
3621 key_portfromsaddr(&sav->sah->saidx.src),
3622 SADB_X_EXT_NAT_T_SPORT)) == NULL)
3623 goto fail;
3624 break;
3625
3626 case SADB_X_EXT_NAT_T_OA:
3627 case SADB_X_EXT_NAT_T_FRAG:
3628 continue;
3629 #endif
3630
3631 case SADB_EXT_ADDRESS_PROXY:
3632 case SADB_EXT_IDENTITY_SRC:
3633 case SADB_EXT_IDENTITY_DST:
3634 /* XXX: should we brought from SPD ? */
3635 case SADB_EXT_SENSITIVITY:
3636 default:
3637 continue;
3638 }
3639
3640 if ((!m && !p) || (m && p))
3641 goto fail;
3642 if (p && tres) {
3643 M_PREPEND(tres, l, M_DONTWAIT);
3644 if (!tres)
3645 goto fail;
3646 memcpy(mtod(tres, void *), p, l);
3647 continue;
3648 }
3649 if (p) {
3650 m = key_alloc_mbuf(l);
3651 if (!m)
3652 goto fail;
3653 m_copyback(m, 0, l, p);
3654 }
3655
3656 if (tres)
3657 m_cat(m, tres);
3658 tres = m;
3659 }
3660
3661 m_cat(result, tres);
3662
3663 if (result->m_len < sizeof(struct sadb_msg)) {
3664 result = m_pullup(result, sizeof(struct sadb_msg));
3665 if (result == NULL)
3666 goto fail;
3667 }
3668
3669 result->m_pkthdr.len = 0;
3670 for (m = result; m; m = m->m_next)
3671 result->m_pkthdr.len += m->m_len;
3672
3673 mtod(result, struct sadb_msg *)->sadb_msg_len =
3674 PFKEY_UNIT64(result->m_pkthdr.len);
3675
3676 return result;
3677
3678 fail:
3679 m_freem(result);
3680 m_freem(tres);
3681 return NULL;
3682 }
3683
3684
3685 #ifdef IPSEC_NAT_T
3686 /*
3687 * set a type in sadb_x_nat_t_type
3688 */
3689 static struct mbuf *
3690 key_setsadbxtype(u_int16_t type)
3691 {
3692 struct mbuf *m;
3693 size_t len;
3694 struct sadb_x_nat_t_type *p;
3695
3696 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_type));
3697
3698 m = key_alloc_mbuf(len);
3699 if (!m || m->m_next) { /*XXX*/
3700 if (m)
3701 m_freem(m);
3702 return NULL;
3703 }
3704
3705 p = mtod(m, struct sadb_x_nat_t_type *);
3706
3707 memset(p, 0, len);
3708 p->sadb_x_nat_t_type_len = PFKEY_UNIT64(len);
3709 p->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
3710 p->sadb_x_nat_t_type_type = type;
3711
3712 return m;
3713 }
3714 /*
3715 * set a port in sadb_x_nat_t_port. port is in network order
3716 */
3717 static struct mbuf *
3718 key_setsadbxport(u_int16_t port, u_int16_t type)
3719 {
3720 struct mbuf *m;
3721 size_t len;
3722 struct sadb_x_nat_t_port *p;
3723
3724 len = PFKEY_ALIGN8(sizeof(struct sadb_x_nat_t_port));
3725
3726 m = key_alloc_mbuf(len);
3727 if (!m || m->m_next) { /*XXX*/
3728 if (m)
3729 m_freem(m);
3730 return NULL;
3731 }
3732
3733 p = mtod(m, struct sadb_x_nat_t_port *);
3734
3735 memset(p, 0, len);
3736 p->sadb_x_nat_t_port_len = PFKEY_UNIT64(len);
3737 p->sadb_x_nat_t_port_exttype = type;
3738 p->sadb_x_nat_t_port_port = port;
3739
3740 return m;
3741 }
3742
3743 /*
3744 * Get port from sockaddr, port is in network order
3745 */
3746 u_int16_t
3747 key_portfromsaddr(const union sockaddr_union *saddr)
3748 {
3749 u_int16_t port;
3750
3751 switch (saddr->sa.sa_family) {
3752 case AF_INET: {
3753 port = saddr->sin.sin_port;
3754 break;
3755 }
3756 #ifdef INET6
3757 case AF_INET6: {
3758 port = saddr->sin6.sin6_port;
3759 break;
3760 }
3761 #endif
3762 default:
3763 printf("key_portfromsaddr: unexpected address family\n");
3764 port = 0;
3765 break;
3766 }
3767
3768 return port;
3769 }
3770
3771 #endif /* IPSEC_NAT_T */
3772
3773 /*
3774 * Set port is struct sockaddr. port is in network order
3775 */
3776 static void
3777 key_porttosaddr(union sockaddr_union *saddr, u_int16_t port)
3778 {
3779 switch (saddr->sa.sa_family) {
3780 case AF_INET: {
3781 saddr->sin.sin_port = port;
3782 break;
3783 }
3784 #ifdef INET6
3785 case AF_INET6: {
3786 saddr->sin6.sin6_port = port;
3787 break;
3788 }
3789 #endif
3790 default:
3791 printf("key_porttosaddr: unexpected address family %d\n",
3792 saddr->sa.sa_family);
3793 break;
3794 }
3795
3796 return;
3797 }
3798
3799 /*
3800 * Safety check sa_len
3801 */
3802 static int
3803 key_checksalen(const union sockaddr_union *saddr)
3804 {
3805 switch (saddr->sa.sa_family) {
3806 case AF_INET:
3807 if (saddr->sa.sa_len != sizeof(struct sockaddr_in))
3808 return -1;
3809 break;
3810 #ifdef INET6
3811 case AF_INET6:
3812 if (saddr->sa.sa_len != sizeof(struct sockaddr_in6))
3813 return -1;
3814 break;
3815 #endif
3816 default:
3817 printf("key_checksalen: unexpected sa_family %d\n",
3818 saddr->sa.sa_family);
3819 return -1;
3820 break;
3821 }
3822 return 0;
3823 }
3824
3825
3826 /*
3827 * set data into sadb_msg.
3828 */
3829 static struct mbuf *
3830 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype,
3831 u_int32_t seq, pid_t pid, u_int16_t reserved)
3832 {
3833 struct mbuf *m;
3834 struct sadb_msg *p;
3835 int len;
3836
3837 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3838 if (len > MCLBYTES)
3839 return NULL;
3840 MGETHDR(m, M_DONTWAIT, MT_DATA);
3841 if (m && len > MHLEN) {
3842 MCLGET(m, M_DONTWAIT);
3843 if ((m->m_flags & M_EXT) == 0) {
3844 m_freem(m);
3845 m = NULL;
3846 }
3847 }
3848 if (!m)
3849 return NULL;
3850 m->m_pkthdr.len = m->m_len = len;
3851 m->m_next = NULL;
3852
3853 p = mtod(m, struct sadb_msg *);
3854
3855 memset(p, 0, len);
3856 p->sadb_msg_version = PF_KEY_V2;
3857 p->sadb_msg_type = type;
3858 p->sadb_msg_errno = 0;
3859 p->sadb_msg_satype = satype;
3860 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3861 p->sadb_msg_reserved = reserved;
3862 p->sadb_msg_seq = seq;
3863 p->sadb_msg_pid = (u_int32_t)pid;
3864
3865 return m;
3866 }
3867
3868 /*
3869 * copy secasvar data into sadb_address.
3870 */
3871 static struct mbuf *
3872 key_setsadbsa(struct secasvar *sav)
3873 {
3874 struct mbuf *m;
3875 struct sadb_sa *p;
3876 int len;
3877
3878 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3879 m = key_alloc_mbuf(len);
3880 if (!m || m->m_next) { /*XXX*/
3881 if (m)
3882 m_freem(m);
3883 return NULL;
3884 }
3885
3886 p = mtod(m, struct sadb_sa *);
3887
3888 memset(p, 0, len);
3889 p->sadb_sa_len = PFKEY_UNIT64(len);
3890 p->sadb_sa_exttype = SADB_EXT_SA;
3891 p->sadb_sa_spi = sav->spi;
3892 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3893 p->sadb_sa_state = sav->state;
3894 p->sadb_sa_auth = sav->alg_auth;
3895 p->sadb_sa_encrypt = sav->alg_enc;
3896 p->sadb_sa_flags = sav->flags;
3897
3898 return m;
3899 }
3900
3901 /*
3902 * set data into sadb_address.
3903 */
3904 static struct mbuf *
3905 key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr,
3906 u_int8_t prefixlen, u_int16_t ul_proto)
3907 {
3908 struct mbuf *m;
3909 struct sadb_address *p;
3910 size_t len;
3911
3912 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3913 PFKEY_ALIGN8(saddr->sa_len);
3914 m = key_alloc_mbuf(len);
3915 if (!m || m->m_next) { /*XXX*/
3916 if (m)
3917 m_freem(m);
3918 return NULL;
3919 }
3920
3921 p = mtod(m, struct sadb_address *);
3922
3923 memset(p, 0, len);
3924 p->sadb_address_len = PFKEY_UNIT64(len);
3925 p->sadb_address_exttype = exttype;
3926 p->sadb_address_proto = ul_proto;
3927 if (prefixlen == FULLMASK) {
3928 switch (saddr->sa_family) {
3929 case AF_INET:
3930 prefixlen = sizeof(struct in_addr) << 3;
3931 break;
3932 case AF_INET6:
3933 prefixlen = sizeof(struct in6_addr) << 3;
3934 break;
3935 default:
3936 ; /*XXX*/
3937 }
3938 }
3939 p->sadb_address_prefixlen = prefixlen;
3940 p->sadb_address_reserved = 0;
3941
3942 memcpy(mtod(m, char *) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3943 saddr, saddr->sa_len);
3944
3945 return m;
3946 }
3947
3948 #if 0
3949 /*
3950 * set data into sadb_ident.
3951 */
3952 static struct mbuf *
3953 key_setsadbident(u_int16_t exttype, u_int16_t idtype,
3954 void *string, int stringlen, u_int64_t id)
3955 {
3956 struct mbuf *m;
3957 struct sadb_ident *p;
3958 size_t len;
3959
3960 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3961 m = key_alloc_mbuf(len);
3962 if (!m || m->m_next) { /*XXX*/
3963 if (m)
3964 m_freem(m);
3965 return NULL;
3966 }
3967
3968 p = mtod(m, struct sadb_ident *);
3969
3970 memset(p, 0, len);
3971 p->sadb_ident_len = PFKEY_UNIT64(len);
3972 p->sadb_ident_exttype = exttype;
3973 p->sadb_ident_type = idtype;
3974 p->sadb_ident_reserved = 0;
3975 p->sadb_ident_id = id;
3976
3977 memcpy(mtod(m, void *) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3978 string, stringlen);
3979
3980 return m;
3981 }
3982 #endif
3983
3984 /*
3985 * set data into sadb_x_sa2.
3986 */
3987 static struct mbuf *
3988 key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int16_t reqid)
3989 {
3990 struct mbuf *m;
3991 struct sadb_x_sa2 *p;
3992 size_t len;
3993
3994 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3995 m = key_alloc_mbuf(len);
3996 if (!m || m->m_next) { /*XXX*/
3997 if (m)
3998 m_freem(m);
3999 return NULL;
4000 }
4001
4002 p = mtod(m, struct sadb_x_sa2 *);
4003
4004 memset(p, 0, len);
4005 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
4006 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
4007 p->sadb_x_sa2_mode = mode;
4008 p->sadb_x_sa2_reserved1 = 0;
4009 p->sadb_x_sa2_reserved2 = 0;
4010 p->sadb_x_sa2_sequence = seq;
4011 p->sadb_x_sa2_reqid = reqid;
4012
4013 return m;
4014 }
4015
4016 /*
4017 * set data into sadb_x_policy
4018 */
4019 static struct mbuf *
4020 key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
4021 {
4022 struct mbuf *m;
4023 struct sadb_x_policy *p;
4024 size_t len;
4025
4026 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
4027 m = key_alloc_mbuf(len);
4028 if (!m || m->m_next) { /*XXX*/
4029 if (m)
4030 m_freem(m);
4031 return NULL;
4032 }
4033
4034 p = mtod(m, struct sadb_x_policy *);
4035
4036 memset(p, 0, len);
4037 p->sadb_x_policy_len = PFKEY_UNIT64(len);
4038 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
4039 p->sadb_x_policy_type = type;
4040 p->sadb_x_policy_dir = dir;
4041 p->sadb_x_policy_id = id;
4042
4043 return m;
4044 }
4045
4046 /* %%% utilities */
4047 /*
4048 * copy a buffer into the new buffer allocated.
4049 */
4050 static void *
4051 key_newbuf(const void *src, u_int len)
4052 {
4053 void *new;
4054
4055 KMALLOC(new, void *, len);
4056 if (new == NULL) {
4057 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
4058 return NULL;
4059 }
4060 memcpy(new, src, len);
4061
4062 return new;
4063 }
4064
4065 /* compare my own address
4066 * OUT: 1: true, i.e. my address.
4067 * 0: false
4068 */
4069 int
4070 key_ismyaddr(struct sockaddr *sa)
4071 {
4072 #ifdef INET
4073 struct sockaddr_in *sin;
4074 struct in_ifaddr *ia;
4075 #endif
4076
4077 /* sanity check */
4078 if (sa == NULL)
4079 panic("key_ismyaddr: NULL pointer is passed");
4080
4081 switch (sa->sa_family) {
4082 #ifdef INET
4083 case AF_INET:
4084 sin = (struct sockaddr_in *)sa;
4085 for (ia = in_ifaddrhead.tqh_first; ia;
4086 ia = ia->ia_link.tqe_next)
4087 {
4088 if (sin->sin_family == ia->ia_addr.sin_family &&
4089 sin->sin_len == ia->ia_addr.sin_len &&
4090 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
4091 {
4092 return 1;
4093 }
4094 }
4095 break;
4096 #endif
4097 #ifdef INET6
4098 case AF_INET6:
4099 return key_ismyaddr6((struct sockaddr_in6 *)sa);
4100 #endif
4101 }
4102
4103 return 0;
4104 }
4105
4106 #ifdef INET6
4107 /*
4108 * compare my own address for IPv6.
4109 * 1: ours
4110 * 0: other
4111 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
4112 */
4113 #include <netinet6/in6_var.h>
4114
4115 static int
4116 key_ismyaddr6(struct sockaddr_in6 *sin6)
4117 {
4118 struct in6_ifaddr *ia;
4119 struct in6_multi *in6m;
4120
4121 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
4122 if (key_sockaddrcmp((struct sockaddr *)&sin6,
4123 (struct sockaddr *)&ia->ia_addr, 0) == 0)
4124 return 1;
4125
4126 /*
4127 * XXX Multicast
4128 * XXX why do we care about multlicast here while we don't care
4129 * about IPv4 multicast??
4130 * XXX scope
4131 */
4132 in6m = NULL;
4133 #ifdef __FreeBSD__
4134 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
4135 #else
4136 for ((in6m) = ia->ia6_multiaddrs.lh_first;
4137 (in6m) != NULL &&
4138 !IN6_ARE_ADDR_EQUAL(&(in6m)->in6m_addr, &sin6->sin6_addr);
4139 (in6m) = in6m->in6m_entry.le_next)
4140 continue;
4141 #endif
4142 if (in6m)
4143 return 1;
4144 }
4145
4146 /* loopback, just for safety */
4147 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
4148 return 1;
4149
4150 return 0;
4151 }
4152 #endif /*INET6*/
4153
4154 /*
4155 * compare two secasindex structure.
4156 * flag can specify to compare 2 saidxes.
4157 * compare two secasindex structure without both mode and reqid.
4158 * don't compare port.
4159 * IN:
4160 * saidx0: source, it can be in SAD.
4161 * saidx1: object.
4162 * OUT:
4163 * 1 : equal
4164 * 0 : not equal
4165 */
4166 static int
4167 key_cmpsaidx(
4168 const struct secasindex *saidx0,
4169 const struct secasindex *saidx1,
4170 int flag)
4171 {
4172 int chkport = 0;
4173
4174 /* sanity */
4175 if (saidx0 == NULL && saidx1 == NULL)
4176 return 1;
4177
4178 if (saidx0 == NULL || saidx1 == NULL)
4179 return 0;
4180
4181 if (saidx0->proto != saidx1->proto)
4182 return 0;
4183
4184 if (flag == CMP_EXACTLY) {
4185 if (saidx0->mode != saidx1->mode)
4186 return 0;
4187 if (saidx0->reqid != saidx1->reqid)
4188 return 0;
4189 if (memcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 ||
4190 memcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0)
4191 return 0;
4192 } else {
4193
4194 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
4195 if (flag == CMP_MODE_REQID
4196 ||flag == CMP_REQID) {
4197 /*
4198 * If reqid of SPD is non-zero, unique SA is required.
4199 * The result must be of same reqid in this case.
4200 */
4201 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
4202 return 0;
4203 }
4204
4205 if (flag == CMP_MODE_REQID) {
4206 if (saidx0->mode != IPSEC_MODE_ANY
4207 && saidx0->mode != saidx1->mode)
4208 return 0;
4209 }
4210
4211 /*
4212 * If NAT-T is enabled, check ports for tunnel mode.
4213 * Don't do it for transport mode, as there is no
4214 * port information available in the SP.
4215 */
4216 #ifdef IPSEC_NAT_T
4217 if (saidx1->mode == IPSEC_MODE_TUNNEL)
4218 chkport = 1;
4219 #endif
4220
4221 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, chkport) != 0) {
4222 return 0;
4223 }
4224 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, chkport) != 0) {
4225 return 0;
4226 }
4227 }
4228
4229 return 1;
4230 }
4231
4232 /*
4233 * compare two secindex structure exactly.
4234 * IN:
4235 * spidx0: source, it is often in SPD.
4236 * spidx1: object, it is often from PFKEY message.
4237 * OUT:
4238 * 1 : equal
4239 * 0 : not equal
4240 */
4241 int
4242 key_cmpspidx_exactly(
4243 struct secpolicyindex *spidx0,
4244 struct secpolicyindex *spidx1)
4245 {
4246 /* sanity */
4247 if (spidx0 == NULL && spidx1 == NULL)
4248 return 1;
4249
4250 if (spidx0 == NULL || spidx1 == NULL)
4251 return 0;
4252
4253 if (spidx0->prefs != spidx1->prefs
4254 || spidx0->prefd != spidx1->prefd
4255 || spidx0->ul_proto != spidx1->ul_proto)
4256 return 0;
4257
4258 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
4259 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
4260 }
4261
4262 /*
4263 * compare two secindex structure with mask.
4264 * IN:
4265 * spidx0: source, it is often in SPD.
4266 * spidx1: object, it is often from IP header.
4267 * OUT:
4268 * 1 : equal
4269 * 0 : not equal
4270 */
4271 int
4272 key_cmpspidx_withmask(
4273 struct secpolicyindex *spidx0,
4274 struct secpolicyindex *spidx1)
4275 {
4276 /* sanity */
4277 if (spidx0 == NULL && spidx1 == NULL)
4278 return 1;
4279
4280 if (spidx0 == NULL || spidx1 == NULL)
4281 return 0;
4282
4283 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
4284 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
4285 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
4286 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
4287 return 0;
4288
4289 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
4290 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
4291 && spidx0->ul_proto != spidx1->ul_proto)
4292 return 0;
4293
4294 switch (spidx0->src.sa.sa_family) {
4295 case AF_INET:
4296 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
4297 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
4298 return 0;
4299 if (!key_bbcmp(&spidx0->src.sin.sin_addr,
4300 &spidx1->src.sin.sin_addr, spidx0->prefs))
4301 return 0;
4302 break;
4303 case AF_INET6:
4304 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
4305 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
4306 return 0;
4307 /*
4308 * scope_id check. if sin6_scope_id is 0, we regard it
4309 * as a wildcard scope, which matches any scope zone ID.
4310 */
4311 if (spidx0->src.sin6.sin6_scope_id &&
4312 spidx1->src.sin6.sin6_scope_id &&
4313 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
4314 return 0;
4315 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
4316 &spidx1->src.sin6.sin6_addr, spidx0->prefs))
4317 return 0;
4318 break;
4319 default:
4320 /* XXX */
4321 if (memcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
4322 return 0;
4323 break;
4324 }
4325
4326 switch (spidx0->dst.sa.sa_family) {
4327 case AF_INET:
4328 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
4329 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
4330 return 0;
4331 if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
4332 &spidx1->dst.sin.sin_addr, spidx0->prefd))
4333 return 0;
4334 break;
4335 case AF_INET6:
4336 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
4337 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
4338 return 0;
4339 /*
4340 * scope_id check. if sin6_scope_id is 0, we regard it
4341 * as a wildcard scope, which matches any scope zone ID.
4342 */
4343 if (spidx0->src.sin6.sin6_scope_id &&
4344 spidx1->src.sin6.sin6_scope_id &&
4345 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
4346 return 0;
4347 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
4348 &spidx1->dst.sin6.sin6_addr, spidx0->prefd))
4349 return 0;
4350 break;
4351 default:
4352 /* XXX */
4353 if (memcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
4354 return 0;
4355 break;
4356 }
4357
4358 /* XXX Do we check other field ? e.g. flowinfo */
4359
4360 return 1;
4361 }
4362
4363 /* returns 0 on match */
4364 static int
4365 key_sockaddrcmp(
4366 const struct sockaddr *sa1,
4367 const struct sockaddr *sa2,
4368 int port)
4369 {
4370 #ifdef satosin
4371 #undef satosin
4372 #endif
4373 #define satosin(s) ((const struct sockaddr_in *)s)
4374 #ifdef satosin6
4375 #undef satosin6
4376 #endif
4377 #define satosin6(s) ((const struct sockaddr_in6 *)s)
4378 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
4379 return 1;
4380
4381 switch (sa1->sa_family) {
4382 case AF_INET:
4383 if (sa1->sa_len != sizeof(struct sockaddr_in))
4384 return 1;
4385 if (satosin(sa1)->sin_addr.s_addr !=
4386 satosin(sa2)->sin_addr.s_addr) {
4387 return 1;
4388 }
4389 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
4390 return 1;
4391 break;
4392 case AF_INET6:
4393 if (sa1->sa_len != sizeof(struct sockaddr_in6))
4394 return 1; /*EINVAL*/
4395 if (satosin6(sa1)->sin6_scope_id !=
4396 satosin6(sa2)->sin6_scope_id) {
4397 return 1;
4398 }
4399 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
4400 &satosin6(sa2)->sin6_addr)) {
4401 return 1;
4402 }
4403 if (port &&
4404 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
4405 return 1;
4406 }
4407 break;
4408 default:
4409 if (memcmp(sa1, sa2, sa1->sa_len) != 0)
4410 return 1;
4411 break;
4412 }
4413
4414 return 0;
4415 #undef satosin
4416 #undef satosin6
4417 }
4418
4419 /*
4420 * compare two buffers with mask.
4421 * IN:
4422 * addr1: source
4423 * addr2: object
4424 * bits: Number of bits to compare
4425 * OUT:
4426 * 1 : equal
4427 * 0 : not equal
4428 */
4429 static int
4430 key_bbcmp(const void *a1, const void *a2, u_int bits)
4431 {
4432 const unsigned char *p1 = a1;
4433 const unsigned char *p2 = a2;
4434
4435 /* XXX: This could be considerably faster if we compare a word
4436 * at a time, but it is complicated on LSB Endian machines */
4437
4438 /* Handle null pointers */
4439 if (p1 == NULL || p2 == NULL)
4440 return (p1 == p2);
4441
4442 while (bits >= 8) {
4443 if (*p1++ != *p2++)
4444 return 0;
4445 bits -= 8;
4446 }
4447
4448 if (bits > 0) {
4449 u_int8_t mask = ~((1<<(8-bits))-1);
4450 if ((*p1 & mask) != (*p2 & mask))
4451 return 0;
4452 }
4453 return 1; /* Match! */
4454 }
4455
4456 /*
4457 * time handler.
4458 * scanning SPD and SAD to check status for each entries,
4459 * and do to remove or to expire.
4460 */
4461 void
4462 key_timehandler(void* arg)
4463 {
4464 u_int dir;
4465 int s;
4466 time_t now = time_second;
4467
4468 s = splsoftnet(); /*called from softclock()*/
4469 mutex_enter(softnet_lock);
4470
4471 /* SPD */
4472 {
4473 struct secpolicy *sp, *nextsp;
4474
4475 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
4476 for (sp = LIST_FIRST(&sptree[dir]);
4477 sp != NULL;
4478 sp = nextsp) {
4479
4480 nextsp = LIST_NEXT(sp, chain);
4481
4482 if (sp->state == IPSEC_SPSTATE_DEAD) {
4483 key_sp_unlink(sp); /*XXX*/
4484
4485 /* 'sp' dead; continue transfers to
4486 * 'sp = nextsp'
4487 */
4488 continue;
4489 }
4490
4491 if (sp->lifetime == 0 && sp->validtime == 0)
4492 continue;
4493
4494 /* the deletion will occur next time */
4495 if ((sp->lifetime && now - sp->created > sp->lifetime)
4496 || (sp->validtime && now - sp->lastused > sp->validtime)) {
4497 key_sp_dead(sp);
4498 key_spdexpire(sp);
4499 continue;
4500 }
4501 }
4502 }
4503 }
4504
4505 /* SAD */
4506 {
4507 struct secashead *sah, *nextsah;
4508 struct secasvar *sav, *nextsav;
4509
4510 for (sah = LIST_FIRST(&sahtree);
4511 sah != NULL;
4512 sah = nextsah) {
4513
4514 nextsah = LIST_NEXT(sah, chain);
4515
4516 /* if sah has been dead, then delete it and process next sah. */
4517 if (sah->state == SADB_SASTATE_DEAD) {
4518 key_delsah(sah);
4519 continue;
4520 }
4521
4522 /* if LARVAL entry doesn't become MATURE, delete it. */
4523 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_LARVAL]);
4524 sav != NULL;
4525 sav = nextsav) {
4526
4527 nextsav = LIST_NEXT(sav, chain);
4528
4529 if (now - sav->created > key_larval_lifetime) {
4530 KEY_FREESAV(&sav);
4531 }
4532 }
4533
4534 /*
4535 * check MATURE entry to start to send expire message
4536 * whether or not.
4537 */
4538 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_MATURE]);
4539 sav != NULL;
4540 sav = nextsav) {
4541
4542 nextsav = LIST_NEXT(sav, chain);
4543
4544 /* we don't need to check. */
4545 if (sav->lft_s == NULL)
4546 continue;
4547
4548 /* sanity check */
4549 if (sav->lft_c == NULL) {
4550 ipseclog((LOG_DEBUG,"key_timehandler: "
4551 "There is no CURRENT time, why?\n"));
4552 continue;
4553 }
4554
4555 /* check SOFT lifetime */
4556 if (sav->lft_s->sadb_lifetime_addtime != 0
4557 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4558 /*
4559 * check SA to be used whether or not.
4560 * when SA hasn't been used, delete it.
4561 */
4562 if (sav->lft_c->sadb_lifetime_usetime == 0) {
4563 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4564 KEY_FREESAV(&sav);
4565 } else {
4566 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4567 /*
4568 * XXX If we keep to send expire
4569 * message in the status of
4570 * DYING. Do remove below code.
4571 */
4572 key_expire(sav);
4573 }
4574 }
4575 /* check SOFT lifetime by bytes */
4576 /*
4577 * XXX I don't know the way to delete this SA
4578 * when new SA is installed. Caution when it's
4579 * installed too big lifetime by time.
4580 */
4581 else if (sav->lft_s->sadb_lifetime_bytes != 0
4582 && sav->lft_s->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4583
4584 key_sa_chgstate(sav, SADB_SASTATE_DYING);
4585 /*
4586 * XXX If we keep to send expire
4587 * message in the status of
4588 * DYING. Do remove below code.
4589 */
4590 key_expire(sav);
4591 }
4592 }
4593
4594 /* check DYING entry to change status to DEAD. */
4595 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DYING]);
4596 sav != NULL;
4597 sav = nextsav) {
4598
4599 nextsav = LIST_NEXT(sav, chain);
4600
4601 /* we don't need to check. */
4602 if (sav->lft_h == NULL)
4603 continue;
4604
4605 /* sanity check */
4606 if (sav->lft_c == NULL) {
4607 ipseclog((LOG_DEBUG, "key_timehandler: "
4608 "There is no CURRENT time, why?\n"));
4609 continue;
4610 }
4611
4612 if (sav->lft_h->sadb_lifetime_addtime != 0
4613 && now - sav->created > sav->lft_h->sadb_lifetime_addtime) {
4614 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4615 KEY_FREESAV(&sav);
4616 }
4617 #if 0 /* XXX Should we keep to send expire message until HARD lifetime ? */
4618 else if (sav->lft_s != NULL
4619 && sav->lft_s->sadb_lifetime_addtime != 0
4620 && now - sav->created > sav->lft_s->sadb_lifetime_addtime) {
4621 /*
4622 * XXX: should be checked to be
4623 * installed the valid SA.
4624 */
4625
4626 /*
4627 * If there is no SA then sending
4628 * expire message.
4629 */
4630 key_expire(sav);
4631 }
4632 #endif
4633 /* check HARD lifetime by bytes */
4634 else if (sav->lft_h->sadb_lifetime_bytes != 0
4635 && sav->lft_h->sadb_lifetime_bytes < sav->lft_c->sadb_lifetime_bytes) {
4636 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
4637 KEY_FREESAV(&sav);
4638 }
4639 }
4640
4641 /* delete entry in DEAD */
4642 for (sav = LIST_FIRST(&sah->savtree[SADB_SASTATE_DEAD]);
4643 sav != NULL;
4644 sav = nextsav) {
4645
4646 nextsav = LIST_NEXT(sav, chain);
4647
4648 /* sanity check */
4649 if (sav->state != SADB_SASTATE_DEAD) {
4650 ipseclog((LOG_DEBUG, "key_timehandler: "
4651 "invalid sav->state "
4652 "(queue: %d SA: %d): "
4653 "kill it anyway\n",
4654 SADB_SASTATE_DEAD, sav->state));
4655 }
4656
4657 /*
4658 * do not call key_freesav() here.
4659 * sav should already be freed, and sav->refcnt
4660 * shows other references to sav
4661 * (such as from SPD).
4662 */
4663 }
4664 }
4665 }
4666
4667 #ifndef IPSEC_NONBLOCK_ACQUIRE
4668 /* ACQ tree */
4669 {
4670 struct secacq *acq, *nextacq;
4671
4672 for (acq = LIST_FIRST(&acqtree);
4673 acq != NULL;
4674 acq = nextacq) {
4675
4676 nextacq = LIST_NEXT(acq, chain);
4677
4678 if (now - acq->created > key_blockacq_lifetime
4679 && __LIST_CHAINED(acq)) {
4680 LIST_REMOVE(acq, chain);
4681 KFREE(acq);
4682 }
4683 }
4684 }
4685 #endif
4686
4687 /* SP ACQ tree */
4688 {
4689 struct secspacq *acq, *nextacq;
4690
4691 for (acq = LIST_FIRST(&spacqtree);
4692 acq != NULL;
4693 acq = nextacq) {
4694
4695 nextacq = LIST_NEXT(acq, chain);
4696
4697 if (now - acq->created > key_blockacq_lifetime
4698 && __LIST_CHAINED(acq)) {
4699 LIST_REMOVE(acq, chain);
4700 KFREE(acq);
4701 }
4702 }
4703 }
4704
4705 /* initialize random seed */
4706 if (key_tick_init_random++ > key_int_random) {
4707 key_tick_init_random = 0;
4708 key_srandom();
4709 }
4710
4711 #ifndef IPSEC_DEBUG2
4712 /* do exchange to tick time !! */
4713 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
4714 #endif /* IPSEC_DEBUG2 */
4715
4716 mutex_exit(softnet_lock);
4717 splx(s);
4718 return;
4719 }
4720
4721 #ifdef __NetBSD__
4722 void srandom(int);
4723 void srandom(int arg) {return;}
4724 #endif
4725
4726 /*
4727 * to initialize a seed for random()
4728 */
4729 static void
4730 key_srandom(void)
4731 {
4732 srandom(time_second);
4733 }
4734
4735 u_long
4736 key_random(void)
4737 {
4738 u_long value;
4739
4740 key_randomfill(&value, sizeof(value));
4741 return value;
4742 }
4743
4744 void
4745 key_randomfill(void *p, size_t l)
4746 {
4747 size_t n;
4748 u_long v;
4749 static int warn = 1;
4750
4751 n = 0;
4752 n = (size_t)read_random(p, (u_int)l);
4753 /* last resort */
4754 while (n < l) {
4755 v = random();
4756 memcpy((u_int8_t *)p + n, &v,
4757 l - n < sizeof(v) ? l - n : sizeof(v));
4758 n += sizeof(v);
4759
4760 if (warn) {
4761 printf("WARNING: pseudo-random number generator "
4762 "used for IPsec processing\n");
4763 warn = 0;
4764 }
4765 }
4766 }
4767
4768 /*
4769 * map SADB_SATYPE_* to IPPROTO_*.
4770 * if satype == SADB_SATYPE then satype is mapped to ~0.
4771 * OUT:
4772 * 0: invalid satype.
4773 */
4774 static u_int16_t
4775 key_satype2proto(u_int8_t satype)
4776 {
4777 switch (satype) {
4778 case SADB_SATYPE_UNSPEC:
4779 return IPSEC_PROTO_ANY;
4780 case SADB_SATYPE_AH:
4781 return IPPROTO_AH;
4782 case SADB_SATYPE_ESP:
4783 return IPPROTO_ESP;
4784 case SADB_X_SATYPE_IPCOMP:
4785 return IPPROTO_IPCOMP;
4786 case SADB_X_SATYPE_TCPSIGNATURE:
4787 return IPPROTO_TCP;
4788 default:
4789 return 0;
4790 }
4791 /* NOTREACHED */
4792 }
4793
4794 /*
4795 * map IPPROTO_* to SADB_SATYPE_*
4796 * OUT:
4797 * 0: invalid protocol type.
4798 */
4799 static u_int8_t
4800 key_proto2satype(u_int16_t proto)
4801 {
4802 switch (proto) {
4803 case IPPROTO_AH:
4804 return SADB_SATYPE_AH;
4805 case IPPROTO_ESP:
4806 return SADB_SATYPE_ESP;
4807 case IPPROTO_IPCOMP:
4808 return SADB_X_SATYPE_IPCOMP;
4809 case IPPROTO_TCP:
4810 return SADB_X_SATYPE_TCPSIGNATURE;
4811 default:
4812 return 0;
4813 }
4814 /* NOTREACHED */
4815 }
4816
4817 static int
4818 key_setsecasidx(int proto, int mode, int reqid,
4819 const struct sadb_address * src,
4820 const struct sadb_address * dst,
4821 struct secasindex * saidx)
4822 {
4823 const union sockaddr_union * src_u =
4824 (const union sockaddr_union *) src;
4825 const union sockaddr_union * dst_u =
4826 (const union sockaddr_union *) dst;
4827
4828 /* sa len safety check */
4829 if (key_checksalen(src_u) != 0)
4830 return -1;
4831 if (key_checksalen(dst_u) != 0)
4832 return -1;
4833
4834 memset(saidx, 0, sizeof(*saidx));
4835 saidx->proto = proto;
4836 saidx->mode = mode;
4837 saidx->reqid = reqid;
4838 memcpy(&saidx->src, src_u, src_u->sa.sa_len);
4839 memcpy(&saidx->dst, dst_u, dst_u->sa.sa_len);
4840
4841 #ifndef IPSEC_NAT_T
4842 key_porttosaddr(&((saidx)->src),0);
4843 key_porttosaddr(&((saidx)->dst),0);
4844 #endif
4845 return 0;
4846 }
4847
4848 /* %%% PF_KEY */
4849 /*
4850 * SADB_GETSPI processing is to receive
4851 * <base, (SA2), src address, dst address, (SPI range)>
4852 * from the IKMPd, to assign a unique spi value, to hang on the INBOUND
4853 * tree with the status of LARVAL, and send
4854 * <base, SA(*), address(SD)>
4855 * to the IKMPd.
4856 *
4857 * IN: mhp: pointer to the pointer to each header.
4858 * OUT: NULL if fail.
4859 * other if success, return pointer to the message to send.
4860 */
4861 static int
4862 key_getspi(struct socket *so, struct mbuf *m,
4863 const struct sadb_msghdr *mhp)
4864 {
4865 struct sadb_address *src0, *dst0;
4866 struct secasindex saidx;
4867 struct secashead *newsah;
4868 struct secasvar *newsav;
4869 u_int8_t proto;
4870 u_int32_t spi;
4871 u_int8_t mode;
4872 u_int16_t reqid;
4873 int error;
4874
4875 /* sanity check */
4876 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
4877 panic("key_getspi: NULL pointer is passed");
4878
4879 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
4880 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
4881 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4882 return key_senderror(so, m, EINVAL);
4883 }
4884 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
4885 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
4886 ipseclog((LOG_DEBUG, "key_getspi: invalid message is passed.\n"));
4887 return key_senderror(so, m, EINVAL);
4888 }
4889 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
4890 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
4891 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
4892 } else {
4893 mode = IPSEC_MODE_ANY;
4894 reqid = 0;
4895 }
4896
4897 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
4898 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
4899
4900 /* map satype to proto */
4901 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
4902 ipseclog((LOG_DEBUG, "key_getspi: invalid satype is passed.\n"));
4903 return key_senderror(so, m, EINVAL);
4904 }
4905
4906
4907 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1,
4908 dst0 + 1, &saidx)) != 0)
4909 return key_senderror(so, m, EINVAL);
4910
4911 /* SPI allocation */
4912 spi = key_do_getnewspi((struct sadb_spirange *)mhp->ext[SADB_EXT_SPIRANGE],
4913 &saidx);
4914 if (spi == 0)
4915 return key_senderror(so, m, EINVAL);
4916
4917 /* get a SA index */
4918 if ((newsah = key_getsah(&saidx)) == NULL) {
4919 /* create a new SA index */
4920 if ((newsah = key_newsah(&saidx)) == NULL) {
4921 ipseclog((LOG_DEBUG, "key_getspi: No more memory.\n"));
4922 return key_senderror(so, m, ENOBUFS);
4923 }
4924 }
4925
4926 /* get a new SA */
4927 /* XXX rewrite */
4928 newsav = KEY_NEWSAV(m, mhp, newsah, &error);
4929 if (newsav == NULL) {
4930 /* XXX don't free new SA index allocated in above. */
4931 return key_senderror(so, m, error);
4932 }
4933
4934 /* set spi */
4935 newsav->spi = htonl(spi);
4936
4937 #ifndef IPSEC_NONBLOCK_ACQUIRE
4938 /* delete the entry in acqtree */
4939 if (mhp->msg->sadb_msg_seq != 0) {
4940 struct secacq *acq;
4941 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) != NULL) {
4942 /* reset counter in order to deletion by timehandler. */
4943 acq->created = time_second;
4944 acq->count = 0;
4945 }
4946 }
4947 #endif
4948
4949 {
4950 struct mbuf *n, *nn;
4951 struct sadb_sa *m_sa;
4952 struct sadb_msg *newmsg;
4953 int off, len;
4954
4955 /* create new sadb_msg to reply. */
4956 len = PFKEY_ALIGN8(sizeof(struct sadb_msg)) +
4957 PFKEY_ALIGN8(sizeof(struct sadb_sa));
4958 if (len > MCLBYTES)
4959 return key_senderror(so, m, ENOBUFS);
4960
4961 MGETHDR(n, M_DONTWAIT, MT_DATA);
4962 if (len > MHLEN) {
4963 MCLGET(n, M_DONTWAIT);
4964 if ((n->m_flags & M_EXT) == 0) {
4965 m_freem(n);
4966 n = NULL;
4967 }
4968 }
4969 if (!n)
4970 return key_senderror(so, m, ENOBUFS);
4971
4972 n->m_len = len;
4973 n->m_next = NULL;
4974 off = 0;
4975
4976 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off);
4977 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
4978
4979 m_sa = (struct sadb_sa *)(mtod(n, char *) + off);
4980 m_sa->sadb_sa_len = PFKEY_UNIT64(sizeof(struct sadb_sa));
4981 m_sa->sadb_sa_exttype = SADB_EXT_SA;
4982 m_sa->sadb_sa_spi = htonl(spi);
4983 off += PFKEY_ALIGN8(sizeof(struct sadb_sa));
4984
4985 #ifdef DIAGNOSTIC
4986 if (off != len)
4987 panic("length inconsistency in key_getspi");
4988 #endif
4989
4990 n->m_next = key_gather_mbuf(m, mhp, 0, 2, SADB_EXT_ADDRESS_SRC,
4991 SADB_EXT_ADDRESS_DST);
4992 if (!n->m_next) {
4993 m_freem(n);
4994 return key_senderror(so, m, ENOBUFS);
4995 }
4996
4997 if (n->m_len < sizeof(struct sadb_msg)) {
4998 n = m_pullup(n, sizeof(struct sadb_msg));
4999 if (n == NULL)
5000 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
5001 }
5002
5003 n->m_pkthdr.len = 0;
5004 for (nn = n; nn; nn = nn->m_next)
5005 n->m_pkthdr.len += nn->m_len;
5006
5007 newmsg = mtod(n, struct sadb_msg *);
5008 newmsg->sadb_msg_seq = newsav->seq;
5009 newmsg->sadb_msg_errno = 0;
5010 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5011
5012 m_freem(m);
5013 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5014 }
5015 }
5016
5017 /*
5018 * allocating new SPI
5019 * called by key_getspi().
5020 * OUT:
5021 * 0: failure.
5022 * others: success.
5023 */
5024 static u_int32_t
5025 key_do_getnewspi(struct sadb_spirange *spirange,
5026 struct secasindex *saidx)
5027 {
5028 u_int32_t newspi;
5029 u_int32_t spmin, spmax;
5030 int count = key_spi_trycnt;
5031
5032 /* set spi range to allocate */
5033 if (spirange != NULL) {
5034 spmin = spirange->sadb_spirange_min;
5035 spmax = spirange->sadb_spirange_max;
5036 } else {
5037 spmin = key_spi_minval;
5038 spmax = key_spi_maxval;
5039 }
5040 /* IPCOMP needs 2-byte SPI */
5041 if (saidx->proto == IPPROTO_IPCOMP) {
5042 u_int32_t t;
5043 if (spmin >= 0x10000)
5044 spmin = 0xffff;
5045 if (spmax >= 0x10000)
5046 spmax = 0xffff;
5047 if (spmin > spmax) {
5048 t = spmin; spmin = spmax; spmax = t;
5049 }
5050 }
5051
5052 if (spmin == spmax) {
5053 if (key_checkspidup(saidx, htonl(spmin)) != NULL) {
5054 ipseclog((LOG_DEBUG, "key_do_getnewspi: SPI %u exists already.\n", spmin));
5055 return 0;
5056 }
5057
5058 count--; /* taking one cost. */
5059 newspi = spmin;
5060
5061 } else {
5062
5063 /* init SPI */
5064 newspi = 0;
5065
5066 /* when requesting to allocate spi ranged */
5067 while (count--) {
5068 /* generate pseudo-random SPI value ranged. */
5069 newspi = spmin + (key_random() % (spmax - spmin + 1));
5070
5071 if (key_checkspidup(saidx, htonl(newspi)) == NULL)
5072 break;
5073 }
5074
5075 if (count == 0 || newspi == 0) {
5076 ipseclog((LOG_DEBUG, "key_do_getnewspi: to allocate spi is failed.\n"));
5077 return 0;
5078 }
5079 }
5080
5081 /* statistics */
5082 keystat.getspi_count =
5083 (keystat.getspi_count + key_spi_trycnt - count) / 2;
5084
5085 return newspi;
5086 }
5087
5088 #ifdef IPSEC_NAT_T
5089 /* Handle IPSEC_NAT_T info if present */
5090 static int
5091 key_handle_natt_info(struct secasvar *sav,
5092 const struct sadb_msghdr *mhp)
5093 {
5094
5095 if (mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL)
5096 printf("update: NAT-T OA present\n");
5097
5098 if ((mhp->ext[SADB_X_EXT_NAT_T_TYPE] != NULL) &&
5099 (mhp->ext[SADB_X_EXT_NAT_T_SPORT] != NULL) &&
5100 (mhp->ext[SADB_X_EXT_NAT_T_DPORT] != NULL)) {
5101 struct sadb_x_nat_t_type *type;
5102 struct sadb_x_nat_t_port *sport;
5103 struct sadb_x_nat_t_port *dport;
5104 struct sadb_address *addr;
5105 struct sadb_x_nat_t_frag *frag;
5106
5107 if ((mhp->extlen[SADB_X_EXT_NAT_T_TYPE] < sizeof(*type)) ||
5108 (mhp->extlen[SADB_X_EXT_NAT_T_SPORT] < sizeof(*sport)) ||
5109 (mhp->extlen[SADB_X_EXT_NAT_T_DPORT] < sizeof(*dport))) {
5110 ipseclog((LOG_DEBUG, "key_update: "
5111 "invalid message.\n"));
5112 return -1;
5113 }
5114
5115 if ((mhp->ext[SADB_X_EXT_NAT_T_OA] != NULL) &&
5116 (mhp->extlen[SADB_X_EXT_NAT_T_OA] < sizeof(*addr))) {
5117 ipseclog((LOG_DEBUG, "key_update: invalid message\n"));
5118 return -1;
5119 }
5120
5121 if ((mhp->ext[SADB_X_EXT_NAT_T_FRAG] != NULL) &&
5122 (mhp->extlen[SADB_X_EXT_NAT_T_FRAG] < sizeof(*frag))) {
5123 ipseclog((LOG_DEBUG, "key_update: invalid message\n"));
5124 return -1;
5125 }
5126
5127 type = (struct sadb_x_nat_t_type *)
5128 mhp->ext[SADB_X_EXT_NAT_T_TYPE];
5129 sport = (struct sadb_x_nat_t_port *)
5130 mhp->ext[SADB_X_EXT_NAT_T_SPORT];
5131 dport = (struct sadb_x_nat_t_port *)
5132 mhp->ext[SADB_X_EXT_NAT_T_DPORT];
5133 addr = (struct sadb_address *)
5134 mhp->ext[SADB_X_EXT_NAT_T_OA];
5135 frag = (struct sadb_x_nat_t_frag *)
5136 mhp->ext[SADB_X_EXT_NAT_T_FRAG];
5137
5138 if (type)
5139 sav->natt_type = type->sadb_x_nat_t_type_type;
5140 if (sport)
5141 key_porttosaddr(&sav->sah->saidx.src,
5142 sport->sadb_x_nat_t_port_port);
5143 if (dport)
5144 key_porttosaddr(&sav->sah->saidx.dst,
5145 dport->sadb_x_nat_t_port_port);
5146 if (frag)
5147 sav->esp_frag = frag->sadb_x_nat_t_frag_fraglen;
5148 else
5149 sav->esp_frag = IP_MAXPACKET;
5150 }
5151
5152 return 0;
5153 }
5154 #endif
5155
5156
5157 /*
5158 * SADB_UPDATE processing
5159 * receive
5160 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5161 * key(AE), (identity(SD),) (sensitivity)>
5162 * from the ikmpd, and update a secasvar entry whose status is SADB_SASTATE_LARVAL.
5163 * and send
5164 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5165 * (identity(SD),) (sensitivity)>
5166 * to the ikmpd.
5167 *
5168 * m will always be freed.
5169 */
5170 static int
5171 key_update(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
5172 {
5173 struct sadb_sa *sa0;
5174 struct sadb_address *src0, *dst0;
5175 struct secasindex saidx;
5176 struct secashead *sah;
5177 struct secasvar *sav;
5178 u_int16_t proto;
5179 u_int8_t mode;
5180 u_int16_t reqid;
5181 int error;
5182
5183 /* sanity check */
5184 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5185 panic("key_update: NULL pointer is passed");
5186
5187 /* map satype to proto */
5188 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5189 ipseclog((LOG_DEBUG, "key_update: invalid satype is passed.\n"));
5190 return key_senderror(so, m, EINVAL);
5191 }
5192
5193 if (mhp->ext[SADB_EXT_SA] == NULL ||
5194 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5195 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
5196 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
5197 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
5198 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
5199 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
5200 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
5201 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
5202 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
5203 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
5204 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
5205 return key_senderror(so, m, EINVAL);
5206 }
5207 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5208 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5209 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5210 ipseclog((LOG_DEBUG, "key_update: invalid message is passed.\n"));
5211 return key_senderror(so, m, EINVAL);
5212 }
5213 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
5214 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5215 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5216 } else {
5217 mode = IPSEC_MODE_ANY;
5218 reqid = 0;
5219 }
5220 /* XXX boundary checking for other extensions */
5221
5222 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5223 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5224 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5225
5226 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1,
5227 dst0 + 1, &saidx)) != 0)
5228 return key_senderror(so, m, EINVAL);
5229
5230
5231 /* get a SA header */
5232 if ((sah = key_getsah(&saidx)) == NULL) {
5233 ipseclog((LOG_DEBUG, "key_update: no SA index found.\n"));
5234 return key_senderror(so, m, ENOENT);
5235 }
5236
5237 /* set spidx if there */
5238 /* XXX rewrite */
5239 error = key_setident(sah, m, mhp);
5240 if (error)
5241 return key_senderror(so, m, error);
5242
5243 /* find a SA with sequence number. */
5244 #ifdef IPSEC_DOSEQCHECK
5245 if (mhp->msg->sadb_msg_seq != 0
5246 && (sav = key_getsavbyseq(sah, mhp->msg->sadb_msg_seq)) == NULL) {
5247 ipseclog((LOG_DEBUG,
5248 "key_update: no larval SA with sequence %u exists.\n",
5249 mhp->msg->sadb_msg_seq));
5250 return key_senderror(so, m, ENOENT);
5251 }
5252 #else
5253 if ((sav = key_getsavbyspi(sah, sa0->sadb_sa_spi)) == NULL) {
5254 ipseclog((LOG_DEBUG,
5255 "key_update: no such a SA found (spi:%u)\n",
5256 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
5257 return key_senderror(so, m, EINVAL);
5258 }
5259 #endif
5260
5261 /* validity check */
5262 if (sav->sah->saidx.proto != proto) {
5263 ipseclog((LOG_DEBUG,
5264 "key_update: protocol mismatched (DB=%u param=%u)\n",
5265 sav->sah->saidx.proto, proto));
5266 return key_senderror(so, m, EINVAL);
5267 }
5268 #ifdef IPSEC_DOSEQCHECK
5269 if (sav->spi != sa0->sadb_sa_spi) {
5270 ipseclog((LOG_DEBUG,
5271 "key_update: SPI mismatched (DB:%u param:%u)\n",
5272 (u_int32_t)ntohl(sav->spi),
5273 (u_int32_t)ntohl(sa0->sadb_sa_spi)));
5274 return key_senderror(so, m, EINVAL);
5275 }
5276 #endif
5277 if (sav->pid != mhp->msg->sadb_msg_pid) {
5278 ipseclog((LOG_DEBUG,
5279 "key_update: pid mismatched (DB:%u param:%u)\n",
5280 sav->pid, mhp->msg->sadb_msg_pid));
5281 return key_senderror(so, m, EINVAL);
5282 }
5283
5284 /* copy sav values */
5285 error = key_setsaval(sav, m, mhp);
5286 if (error) {
5287 KEY_FREESAV(&sav);
5288 return key_senderror(so, m, error);
5289 }
5290
5291 /* check SA values to be mature. */
5292 if ((mhp->msg->sadb_msg_errno = key_mature(sav)) != 0) {
5293 KEY_FREESAV(&sav);
5294 return key_senderror(so, m, 0);
5295 }
5296
5297 #ifdef IPSEC_NAT_T
5298 if ((error = key_handle_natt_info(sav,mhp)) != 0)
5299 return key_senderror(so, m, EINVAL);
5300 #endif /* IPSEC_NAT_T */
5301
5302 {
5303 struct mbuf *n;
5304
5305 /* set msg buf from mhp */
5306 n = key_getmsgbuf_x1(m, mhp);
5307 if (n == NULL) {
5308 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
5309 return key_senderror(so, m, ENOBUFS);
5310 }
5311
5312 m_freem(m);
5313 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5314 }
5315 }
5316
5317 /*
5318 * search SAD with sequence for a SA which state is SADB_SASTATE_LARVAL.
5319 * only called by key_update().
5320 * OUT:
5321 * NULL : not found
5322 * others : found, pointer to a SA.
5323 */
5324 #ifdef IPSEC_DOSEQCHECK
5325 static struct secasvar *
5326 key_getsavbyseq(struct secashead *sah, u_int32_t seq)
5327 {
5328 struct secasvar *sav;
5329 u_int state;
5330
5331 state = SADB_SASTATE_LARVAL;
5332
5333 /* search SAD with sequence number ? */
5334 LIST_FOREACH(sav, &sah->savtree[state], chain) {
5335
5336 KEY_CHKSASTATE(state, sav->state, "key_getsabyseq");
5337
5338 if (sav->seq == seq) {
5339 SA_ADDREF(sav);
5340 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
5341 printf("DP key_getsavbyseq cause "
5342 "refcnt++:%d SA:%p\n",
5343 sav->refcnt, sav));
5344 return sav;
5345 }
5346 }
5347
5348 return NULL;
5349 }
5350 #endif
5351
5352 /*
5353 * SADB_ADD processing
5354 * add an entry to SA database, when received
5355 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5356 * key(AE), (identity(SD),) (sensitivity)>
5357 * from the ikmpd,
5358 * and send
5359 * <base, SA, (SA2), (lifetime(HSC),) address(SD), (address(P),)
5360 * (identity(SD),) (sensitivity)>
5361 * to the ikmpd.
5362 *
5363 * IGNORE identity and sensitivity messages.
5364 *
5365 * m will always be freed.
5366 */
5367 static int
5368 key_add(struct socket *so, struct mbuf *m,
5369 const struct sadb_msghdr *mhp)
5370 {
5371 struct sadb_sa *sa0;
5372 struct sadb_address *src0, *dst0;
5373 struct secasindex saidx;
5374 struct secashead *newsah;
5375 struct secasvar *newsav;
5376 u_int16_t proto;
5377 u_int8_t mode;
5378 u_int16_t reqid;
5379 int error;
5380
5381 /* sanity check */
5382 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5383 panic("key_add: NULL pointer is passed");
5384
5385 /* map satype to proto */
5386 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5387 ipseclog((LOG_DEBUG, "key_add: invalid satype is passed.\n"));
5388 return key_senderror(so, m, EINVAL);
5389 }
5390
5391 if (mhp->ext[SADB_EXT_SA] == NULL ||
5392 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5393 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
5394 (mhp->msg->sadb_msg_satype == SADB_SATYPE_ESP &&
5395 mhp->ext[SADB_EXT_KEY_ENCRYPT] == NULL) ||
5396 (mhp->msg->sadb_msg_satype == SADB_SATYPE_AH &&
5397 mhp->ext[SADB_EXT_KEY_AUTH] == NULL) ||
5398 (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL &&
5399 mhp->ext[SADB_EXT_LIFETIME_SOFT] == NULL) ||
5400 (mhp->ext[SADB_EXT_LIFETIME_HARD] == NULL &&
5401 mhp->ext[SADB_EXT_LIFETIME_SOFT] != NULL)) {
5402 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
5403 return key_senderror(so, m, EINVAL);
5404 }
5405 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5406 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5407 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5408 /* XXX need more */
5409 ipseclog((LOG_DEBUG, "key_add: invalid message is passed.\n"));
5410 return key_senderror(so, m, EINVAL);
5411 }
5412 if (mhp->ext[SADB_X_EXT_SA2] != NULL) {
5413 mode = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_mode;
5414 reqid = ((struct sadb_x_sa2 *)mhp->ext[SADB_X_EXT_SA2])->sadb_x_sa2_reqid;
5415 } else {
5416 mode = IPSEC_MODE_ANY;
5417 reqid = 0;
5418 }
5419
5420 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5421 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5422 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5423
5424 if ((error = key_setsecasidx(proto, mode, reqid, src0 + 1,
5425 dst0 + 1, &saidx)) != 0)
5426 return key_senderror(so, m, EINVAL);
5427
5428 /* get a SA header */
5429 if ((newsah = key_getsah(&saidx)) == NULL) {
5430 /* create a new SA header */
5431 if ((newsah = key_newsah(&saidx)) == NULL) {
5432 ipseclog((LOG_DEBUG, "key_add: No more memory.\n"));
5433 return key_senderror(so, m, ENOBUFS);
5434 }
5435 }
5436
5437 /* set spidx if there */
5438 /* XXX rewrite */
5439 error = key_setident(newsah, m, mhp);
5440 if (error) {
5441 return key_senderror(so, m, error);
5442 }
5443
5444 /* create new SA entry. */
5445 /* We can create new SA only if SPI is differenct. */
5446 if (key_getsavbyspi(newsah, sa0->sadb_sa_spi)) {
5447 ipseclog((LOG_DEBUG, "key_add: SA already exists.\n"));
5448 return key_senderror(so, m, EEXIST);
5449 }
5450 newsav = KEY_NEWSAV(m, mhp, newsah, &error);
5451 if (newsav == NULL) {
5452 return key_senderror(so, m, error);
5453 }
5454
5455 /* check SA values to be mature. */
5456 if ((error = key_mature(newsav)) != 0) {
5457 KEY_FREESAV(&newsav);
5458 return key_senderror(so, m, error);
5459 }
5460
5461 #ifdef IPSEC_NAT_T
5462 if ((error = key_handle_natt_info(newsav, mhp)) != 0)
5463 return key_senderror(so, m, EINVAL);
5464 #endif /* IPSEC_NAT_T */
5465
5466 /*
5467 * don't call key_freesav() here, as we would like to keep the SA
5468 * in the database on success.
5469 */
5470
5471 {
5472 struct mbuf *n;
5473
5474 /* set msg buf from mhp */
5475 n = key_getmsgbuf_x1(m, mhp);
5476 if (n == NULL) {
5477 ipseclog((LOG_DEBUG, "key_update: No more memory.\n"));
5478 return key_senderror(so, m, ENOBUFS);
5479 }
5480
5481 m_freem(m);
5482 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5483 }
5484 }
5485
5486 /* m is retained */
5487 static int
5488 key_setident(struct secashead *sah, struct mbuf *m,
5489 const struct sadb_msghdr *mhp)
5490 {
5491 const struct sadb_ident *idsrc, *iddst;
5492 int idsrclen, iddstlen;
5493
5494 /* sanity check */
5495 if (sah == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5496 panic("key_setident: NULL pointer is passed");
5497
5498 /* don't make buffer if not there */
5499 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL &&
5500 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5501 sah->idents = NULL;
5502 sah->identd = NULL;
5503 return 0;
5504 }
5505
5506 if (mhp->ext[SADB_EXT_IDENTITY_SRC] == NULL ||
5507 mhp->ext[SADB_EXT_IDENTITY_DST] == NULL) {
5508 ipseclog((LOG_DEBUG, "key_setident: invalid identity.\n"));
5509 return EINVAL;
5510 }
5511
5512 idsrc = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_SRC];
5513 iddst = (const struct sadb_ident *)mhp->ext[SADB_EXT_IDENTITY_DST];
5514 idsrclen = mhp->extlen[SADB_EXT_IDENTITY_SRC];
5515 iddstlen = mhp->extlen[SADB_EXT_IDENTITY_DST];
5516
5517 /* validity check */
5518 if (idsrc->sadb_ident_type != iddst->sadb_ident_type) {
5519 ipseclog((LOG_DEBUG, "key_setident: ident type mismatch.\n"));
5520 return EINVAL;
5521 }
5522
5523 switch (idsrc->sadb_ident_type) {
5524 case SADB_IDENTTYPE_PREFIX:
5525 case SADB_IDENTTYPE_FQDN:
5526 case SADB_IDENTTYPE_USERFQDN:
5527 default:
5528 /* XXX do nothing */
5529 sah->idents = NULL;
5530 sah->identd = NULL;
5531 return 0;
5532 }
5533
5534 /* make structure */
5535 KMALLOC(sah->idents, struct sadb_ident *, idsrclen);
5536 if (sah->idents == NULL) {
5537 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5538 return ENOBUFS;
5539 }
5540 KMALLOC(sah->identd, struct sadb_ident *, iddstlen);
5541 if (sah->identd == NULL) {
5542 KFREE(sah->idents);
5543 sah->idents = NULL;
5544 ipseclog((LOG_DEBUG, "key_setident: No more memory.\n"));
5545 return ENOBUFS;
5546 }
5547 memcpy(sah->idents, idsrc, idsrclen);
5548 memcpy(sah->identd, iddst, iddstlen);
5549
5550 return 0;
5551 }
5552
5553 /*
5554 * m will not be freed on return.
5555 * it is caller's responsibility to free the result.
5556 */
5557 static struct mbuf *
5558 key_getmsgbuf_x1(struct mbuf *m, const struct sadb_msghdr *mhp)
5559 {
5560 struct mbuf *n;
5561
5562 /* sanity check */
5563 if (m == NULL || mhp == NULL || mhp->msg == NULL)
5564 panic("key_getmsgbuf_x1: NULL pointer is passed");
5565
5566 /* create new sadb_msg to reply. */
5567 n = key_gather_mbuf(m, mhp, 1, 9, SADB_EXT_RESERVED,
5568 SADB_EXT_SA, SADB_X_EXT_SA2,
5569 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST,
5570 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
5571 SADB_EXT_IDENTITY_SRC, SADB_EXT_IDENTITY_DST);
5572 if (!n)
5573 return NULL;
5574
5575 if (n->m_len < sizeof(struct sadb_msg)) {
5576 n = m_pullup(n, sizeof(struct sadb_msg));
5577 if (n == NULL)
5578 return NULL;
5579 }
5580 mtod(n, struct sadb_msg *)->sadb_msg_errno = 0;
5581 mtod(n, struct sadb_msg *)->sadb_msg_len =
5582 PFKEY_UNIT64(n->m_pkthdr.len);
5583
5584 return n;
5585 }
5586
5587 static int key_delete_all (struct socket *, struct mbuf *,
5588 const struct sadb_msghdr *, u_int16_t);
5589
5590 /*
5591 * SADB_DELETE processing
5592 * receive
5593 * <base, SA(*), address(SD)>
5594 * from the ikmpd, and set SADB_SASTATE_DEAD,
5595 * and send,
5596 * <base, SA(*), address(SD)>
5597 * to the ikmpd.
5598 *
5599 * m will always be freed.
5600 */
5601 static int
5602 key_delete(struct socket *so, struct mbuf *m,
5603 const struct sadb_msghdr *mhp)
5604 {
5605 struct sadb_sa *sa0;
5606 struct sadb_address *src0, *dst0;
5607 struct secasindex saidx;
5608 struct secashead *sah;
5609 struct secasvar *sav = NULL;
5610 u_int16_t proto;
5611 int error;
5612
5613 /* sanity check */
5614 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5615 panic("key_delete: NULL pointer is passed");
5616
5617 /* map satype to proto */
5618 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5619 ipseclog((LOG_DEBUG, "key_delete: invalid satype is passed.\n"));
5620 return key_senderror(so, m, EINVAL);
5621 }
5622
5623 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5624 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5625 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5626 return key_senderror(so, m, EINVAL);
5627 }
5628
5629 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5630 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5631 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5632 return key_senderror(so, m, EINVAL);
5633 }
5634
5635 if (mhp->ext[SADB_EXT_SA] == NULL) {
5636 /*
5637 * Caller wants us to delete all non-LARVAL SAs
5638 * that match the src/dst. This is used during
5639 * IKE INITIAL-CONTACT.
5640 */
5641 ipseclog((LOG_DEBUG, "key_delete: doing delete all.\n"));
5642 return key_delete_all(so, m, mhp, proto);
5643 } else if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa)) {
5644 ipseclog((LOG_DEBUG, "key_delete: invalid message is passed.\n"));
5645 return key_senderror(so, m, EINVAL);
5646 }
5647
5648 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5649 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5650 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5651
5652 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1,
5653 dst0 + 1, &saidx)) != 0)
5654 return key_senderror(so, m, EINVAL);
5655
5656 /* get a SA header */
5657 LIST_FOREACH(sah, &sahtree, chain) {
5658 if (sah->state == SADB_SASTATE_DEAD)
5659 continue;
5660 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5661 continue;
5662
5663 /* get a SA with SPI. */
5664 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5665 if (sav)
5666 break;
5667 }
5668 if (sah == NULL) {
5669 ipseclog((LOG_DEBUG, "key_delete: no SA found.\n"));
5670 return key_senderror(so, m, ENOENT);
5671 }
5672
5673 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5674 KEY_FREESAV(&sav);
5675
5676 {
5677 struct mbuf *n;
5678 struct sadb_msg *newmsg;
5679
5680 /* create new sadb_msg to reply. */
5681 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
5682 SADB_EXT_SA, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5683 if (!n)
5684 return key_senderror(so, m, ENOBUFS);
5685
5686 if (n->m_len < sizeof(struct sadb_msg)) {
5687 n = m_pullup(n, sizeof(struct sadb_msg));
5688 if (n == NULL)
5689 return key_senderror(so, m, ENOBUFS);
5690 }
5691 newmsg = mtod(n, struct sadb_msg *);
5692 newmsg->sadb_msg_errno = 0;
5693 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5694
5695 m_freem(m);
5696 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5697 }
5698 }
5699
5700 /*
5701 * delete all SAs for src/dst. Called from key_delete().
5702 */
5703 static int
5704 key_delete_all(struct socket *so, struct mbuf *m,
5705 const struct sadb_msghdr *mhp, u_int16_t proto)
5706 {
5707 struct sadb_address *src0, *dst0;
5708 struct secasindex saidx;
5709 struct secashead *sah;
5710 struct secasvar *sav, *nextsav;
5711 u_int stateidx, state;
5712 int error;
5713
5714 src0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_SRC]);
5715 dst0 = (struct sadb_address *)(mhp->ext[SADB_EXT_ADDRESS_DST]);
5716
5717 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1,
5718 dst0 + 1, &saidx)) != 0)
5719 return key_senderror(so, m, EINVAL);
5720
5721 LIST_FOREACH(sah, &sahtree, chain) {
5722 if (sah->state == SADB_SASTATE_DEAD)
5723 continue;
5724 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5725 continue;
5726
5727 /* Delete all non-LARVAL SAs. */
5728 for (stateidx = 0;
5729 stateidx < _ARRAYLEN(saorder_state_alive);
5730 stateidx++) {
5731 state = saorder_state_alive[stateidx];
5732 if (state == SADB_SASTATE_LARVAL)
5733 continue;
5734 for (sav = LIST_FIRST(&sah->savtree[state]);
5735 sav != NULL; sav = nextsav) {
5736 nextsav = LIST_NEXT(sav, chain);
5737 /* sanity check */
5738 if (sav->state != state) {
5739 ipseclog((LOG_DEBUG, "key_delete_all: "
5740 "invalid sav->state "
5741 "(queue: %d SA: %d)\n",
5742 state, sav->state));
5743 continue;
5744 }
5745
5746 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
5747 KEY_FREESAV(&sav);
5748 }
5749 }
5750 }
5751 {
5752 struct mbuf *n;
5753 struct sadb_msg *newmsg;
5754
5755 /* create new sadb_msg to reply. */
5756 n = key_gather_mbuf(m, mhp, 1, 3, SADB_EXT_RESERVED,
5757 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
5758 if (!n)
5759 return key_senderror(so, m, ENOBUFS);
5760
5761 if (n->m_len < sizeof(struct sadb_msg)) {
5762 n = m_pullup(n, sizeof(struct sadb_msg));
5763 if (n == NULL)
5764 return key_senderror(so, m, ENOBUFS);
5765 }
5766 newmsg = mtod(n, struct sadb_msg *);
5767 newmsg->sadb_msg_errno = 0;
5768 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
5769
5770 m_freem(m);
5771 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
5772 }
5773 }
5774
5775 /*
5776 * SADB_GET processing
5777 * receive
5778 * <base, SA(*), address(SD)>
5779 * from the ikmpd, and get a SP and a SA to respond,
5780 * and send,
5781 * <base, SA, (lifetime(HSC),) address(SD), (address(P),) key(AE),
5782 * (identity(SD),) (sensitivity)>
5783 * to the ikmpd.
5784 *
5785 * m will always be freed.
5786 */
5787 static int
5788 key_get(struct socket *so, struct mbuf *m,
5789 const struct sadb_msghdr *mhp)
5790 {
5791 struct sadb_sa *sa0;
5792 struct sadb_address *src0, *dst0;
5793 struct secasindex saidx;
5794 struct secashead *sah;
5795 struct secasvar *sav = NULL;
5796 u_int16_t proto;
5797 int error;
5798
5799 /* sanity check */
5800 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
5801 panic("key_get: NULL pointer is passed");
5802
5803 /* map satype to proto */
5804 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
5805 ipseclog((LOG_DEBUG, "key_get: invalid satype is passed.\n"));
5806 return key_senderror(so, m, EINVAL);
5807 }
5808
5809 if (mhp->ext[SADB_EXT_SA] == NULL ||
5810 mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
5811 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL) {
5812 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5813 return key_senderror(so, m, EINVAL);
5814 }
5815 if (mhp->extlen[SADB_EXT_SA] < sizeof(struct sadb_sa) ||
5816 mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
5817 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address)) {
5818 ipseclog((LOG_DEBUG, "key_get: invalid message is passed.\n"));
5819 return key_senderror(so, m, EINVAL);
5820 }
5821
5822 sa0 = (struct sadb_sa *)mhp->ext[SADB_EXT_SA];
5823 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
5824 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
5825
5826
5827 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1,
5828 dst0 + 1, &saidx)) != 0)
5829 return key_senderror(so, m, EINVAL);
5830
5831 /* get a SA header */
5832 LIST_FOREACH(sah, &sahtree, chain) {
5833 if (sah->state == SADB_SASTATE_DEAD)
5834 continue;
5835 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_HEAD) == 0)
5836 continue;
5837
5838 /* get a SA with SPI. */
5839 sav = key_getsavbyspi(sah, sa0->sadb_sa_spi);
5840 if (sav)
5841 break;
5842 }
5843 if (sah == NULL) {
5844 ipseclog((LOG_DEBUG, "key_get: no SA found.\n"));
5845 return key_senderror(so, m, ENOENT);
5846 }
5847
5848 {
5849 struct mbuf *n;
5850 u_int8_t satype;
5851
5852 /* map proto to satype */
5853 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
5854 ipseclog((LOG_DEBUG, "key_get: there was invalid proto in SAD.\n"));
5855 return key_senderror(so, m, EINVAL);
5856 }
5857
5858 /* create new sadb_msg to reply. */
5859 n = key_setdumpsa(sav, SADB_GET, satype, mhp->msg->sadb_msg_seq,
5860 mhp->msg->sadb_msg_pid);
5861 if (!n)
5862 return key_senderror(so, m, ENOBUFS);
5863
5864 m_freem(m);
5865 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
5866 }
5867 }
5868
5869 /* XXX make it sysctl-configurable? */
5870 static void
5871 key_getcomb_setlifetime(struct sadb_comb *comb)
5872 {
5873
5874 comb->sadb_comb_soft_allocations = 1;
5875 comb->sadb_comb_hard_allocations = 1;
5876 comb->sadb_comb_soft_bytes = 0;
5877 comb->sadb_comb_hard_bytes = 0;
5878 comb->sadb_comb_hard_addtime = 86400; /* 1 day */
5879 comb->sadb_comb_soft_addtime = comb->sadb_comb_soft_addtime * 80 / 100;
5880 comb->sadb_comb_soft_usetime = 28800; /* 8 hours */
5881 comb->sadb_comb_hard_usetime = comb->sadb_comb_hard_usetime * 80 / 100;
5882 }
5883
5884 /*
5885 * XXX reorder combinations by preference
5886 * XXX no idea if the user wants ESP authentication or not
5887 */
5888 static struct mbuf *
5889 key_getcomb_esp(void)
5890 {
5891 struct sadb_comb *comb;
5892 struct enc_xform *algo;
5893 struct mbuf *result = NULL, *m, *n;
5894 int encmin;
5895 int i, off, o;
5896 int totlen;
5897 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5898
5899 m = NULL;
5900 for (i = 1; i <= SADB_EALG_MAX; i++) {
5901 algo = esp_algorithm_lookup(i);
5902 if (algo == NULL)
5903 continue;
5904
5905 /* discard algorithms with key size smaller than system min */
5906 if (_BITS(algo->maxkey) < ipsec_esp_keymin)
5907 continue;
5908 if (_BITS(algo->minkey) < ipsec_esp_keymin)
5909 encmin = ipsec_esp_keymin;
5910 else
5911 encmin = _BITS(algo->minkey);
5912
5913 if (ipsec_esp_auth)
5914 m = key_getcomb_ah();
5915 else {
5916 IPSEC_ASSERT(l <= MLEN,
5917 ("key_getcomb_esp: l=%u > MLEN=%lu",
5918 l, (u_long) MLEN));
5919 MGET(m, M_DONTWAIT, MT_DATA);
5920 if (m) {
5921 M_ALIGN(m, l);
5922 m->m_len = l;
5923 m->m_next = NULL;
5924 memset(mtod(m, void *), 0, m->m_len);
5925 }
5926 }
5927 if (!m)
5928 goto fail;
5929
5930 totlen = 0;
5931 for (n = m; n; n = n->m_next)
5932 totlen += n->m_len;
5933 IPSEC_ASSERT((totlen % l) == 0,
5934 ("key_getcomb_esp: totlen=%u, l=%u", totlen, l));
5935
5936 for (off = 0; off < totlen; off += l) {
5937 n = m_pulldown(m, off, l, &o);
5938 if (!n) {
5939 /* m is already freed */
5940 goto fail;
5941 }
5942 comb = (struct sadb_comb *)(mtod(n, char *) + o);
5943 memset(comb, 0, sizeof(*comb));
5944 key_getcomb_setlifetime(comb);
5945 comb->sadb_comb_encrypt = i;
5946 comb->sadb_comb_encrypt_minbits = encmin;
5947 comb->sadb_comb_encrypt_maxbits = _BITS(algo->maxkey);
5948 }
5949
5950 if (!result)
5951 result = m;
5952 else
5953 m_cat(result, m);
5954 }
5955
5956 return result;
5957
5958 fail:
5959 if (result)
5960 m_freem(result);
5961 return NULL;
5962 }
5963
5964 static void
5965 key_getsizes_ah(const struct auth_hash *ah, int alg,
5966 u_int16_t* ksmin, u_int16_t* ksmax)
5967 {
5968 *ksmin = *ksmax = ah->keysize;
5969 if (ah->keysize == 0) {
5970 /*
5971 * Transform takes arbitrary key size but algorithm
5972 * key size is restricted. Enforce this here.
5973 */
5974 switch (alg) {
5975 case SADB_X_AALG_MD5: *ksmin = *ksmax = 16; break;
5976 case SADB_X_AALG_SHA: *ksmin = *ksmax = 20; break;
5977 case SADB_X_AALG_NULL: *ksmin = 1; *ksmax = 256; break;
5978 default:
5979 DPRINTF(("key_getsizes_ah: unknown AH algorithm %u\n",
5980 alg));
5981 break;
5982 }
5983 }
5984 }
5985
5986 /*
5987 * XXX reorder combinations by preference
5988 */
5989 static struct mbuf *
5990 key_getcomb_ah(void)
5991 {
5992 struct sadb_comb *comb;
5993 struct auth_hash *algo;
5994 struct mbuf *m;
5995 u_int16_t minkeysize, maxkeysize;
5996 int i;
5997 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
5998
5999 m = NULL;
6000 for (i = 1; i <= SADB_AALG_MAX; i++) {
6001 #if 1
6002 /* we prefer HMAC algorithms, not old algorithms */
6003 if (i != SADB_AALG_SHA1HMAC && i != SADB_AALG_MD5HMAC)
6004 continue;
6005 #endif
6006 algo = ah_algorithm_lookup(i);
6007 if (!algo)
6008 continue;
6009 key_getsizes_ah(algo, i, &minkeysize, &maxkeysize);
6010 /* discard algorithms with key size smaller than system min */
6011 if (_BITS(minkeysize) < ipsec_ah_keymin)
6012 continue;
6013
6014 if (!m) {
6015 IPSEC_ASSERT(l <= MLEN,
6016 ("key_getcomb_ah: l=%u > MLEN=%lu",
6017 l, (u_long) MLEN));
6018 MGET(m, M_DONTWAIT, MT_DATA);
6019 if (m) {
6020 M_ALIGN(m, l);
6021 m->m_len = l;
6022 m->m_next = NULL;
6023 }
6024 } else
6025 M_PREPEND(m, l, M_DONTWAIT);
6026 if (!m)
6027 return NULL;
6028
6029 comb = mtod(m, struct sadb_comb *);
6030 memset(comb, 0, sizeof(*comb));
6031 key_getcomb_setlifetime(comb);
6032 comb->sadb_comb_auth = i;
6033 comb->sadb_comb_auth_minbits = _BITS(minkeysize);
6034 comb->sadb_comb_auth_maxbits = _BITS(maxkeysize);
6035 }
6036
6037 return m;
6038 }
6039
6040 /*
6041 * not really an official behavior. discussed in pf_key@inner.net in Sep2000.
6042 * XXX reorder combinations by preference
6043 */
6044 static struct mbuf *
6045 key_getcomb_ipcomp(void)
6046 {
6047 struct sadb_comb *comb;
6048 struct comp_algo *algo;
6049 struct mbuf *m;
6050 int i;
6051 const int l = PFKEY_ALIGN8(sizeof(struct sadb_comb));
6052
6053 m = NULL;
6054 for (i = 1; i <= SADB_X_CALG_MAX; i++) {
6055 algo = ipcomp_algorithm_lookup(i);
6056 if (!algo)
6057 continue;
6058
6059 if (!m) {
6060 IPSEC_ASSERT(l <= MLEN,
6061 ("key_getcomb_ipcomp: l=%u > MLEN=%lu",
6062 l, (u_long) MLEN));
6063 MGET(m, M_DONTWAIT, MT_DATA);
6064 if (m) {
6065 M_ALIGN(m, l);
6066 m->m_len = l;
6067 m->m_next = NULL;
6068 }
6069 } else
6070 M_PREPEND(m, l, M_DONTWAIT);
6071 if (!m)
6072 return NULL;
6073
6074 comb = mtod(m, struct sadb_comb *);
6075 memset(comb, 0, sizeof(*comb));
6076 key_getcomb_setlifetime(comb);
6077 comb->sadb_comb_encrypt = i;
6078 /* what should we set into sadb_comb_*_{min,max}bits? */
6079 }
6080
6081 return m;
6082 }
6083
6084 /*
6085 * XXX no way to pass mode (transport/tunnel) to userland
6086 * XXX replay checking?
6087 * XXX sysctl interface to ipsec_{ah,esp}_keymin
6088 */
6089 static struct mbuf *
6090 key_getprop(const struct secasindex *saidx)
6091 {
6092 struct sadb_prop *prop;
6093 struct mbuf *m, *n;
6094 const int l = PFKEY_ALIGN8(sizeof(struct sadb_prop));
6095 int totlen;
6096
6097 switch (saidx->proto) {
6098 case IPPROTO_ESP:
6099 m = key_getcomb_esp();
6100 break;
6101 case IPPROTO_AH:
6102 m = key_getcomb_ah();
6103 break;
6104 case IPPROTO_IPCOMP:
6105 m = key_getcomb_ipcomp();
6106 break;
6107 default:
6108 return NULL;
6109 }
6110
6111 if (!m)
6112 return NULL;
6113 M_PREPEND(m, l, M_DONTWAIT);
6114 if (!m)
6115 return NULL;
6116
6117 totlen = 0;
6118 for (n = m; n; n = n->m_next)
6119 totlen += n->m_len;
6120
6121 prop = mtod(m, struct sadb_prop *);
6122 memset(prop, 0, sizeof(*prop));
6123 prop->sadb_prop_len = PFKEY_UNIT64(totlen);
6124 prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
6125 prop->sadb_prop_replay = 32; /* XXX */
6126
6127 return m;
6128 }
6129
6130 /*
6131 * SADB_ACQUIRE processing called by key_checkrequest() and key_acquire2().
6132 * send
6133 * <base, SA, address(SD), (address(P)), x_policy,
6134 * (identity(SD),) (sensitivity,) proposal>
6135 * to KMD, and expect to receive
6136 * <base> with SADB_ACQUIRE if error occurred,
6137 * or
6138 * <base, src address, dst address, (SPI range)> with SADB_GETSPI
6139 * from KMD by PF_KEY.
6140 *
6141 * XXX x_policy is outside of RFC2367 (KAME extension).
6142 * XXX sensitivity is not supported.
6143 * XXX for ipcomp, RFC2367 does not define how to fill in proposal.
6144 * see comment for key_getcomb_ipcomp().
6145 *
6146 * OUT:
6147 * 0 : succeed
6148 * others: error number
6149 */
6150 static int
6151 key_acquire(const struct secasindex *saidx, struct secpolicy *sp)
6152 {
6153 struct mbuf *result = NULL, *m;
6154 #ifndef IPSEC_NONBLOCK_ACQUIRE
6155 struct secacq *newacq;
6156 #endif
6157 u_int8_t satype;
6158 int error = -1;
6159 u_int32_t seq;
6160
6161 /* sanity check */
6162 IPSEC_ASSERT(saidx != NULL, ("key_acquire: null saidx"));
6163 satype = key_proto2satype(saidx->proto);
6164 IPSEC_ASSERT(satype != 0,
6165 ("key_acquire: null satype, protocol %u", saidx->proto));
6166
6167 #ifndef IPSEC_NONBLOCK_ACQUIRE
6168 /*
6169 * We never do anything about acquirng SA. There is anather
6170 * solution that kernel blocks to send SADB_ACQUIRE message until
6171 * getting something message from IKEd. In later case, to be
6172 * managed with ACQUIRING list.
6173 */
6174 /* Get an entry to check whether sending message or not. */
6175 if ((newacq = key_getacq(saidx)) != NULL) {
6176 if (key_blockacq_count < newacq->count) {
6177 /* reset counter and do send message. */
6178 newacq->count = 0;
6179 } else {
6180 /* increment counter and do nothing. */
6181 newacq->count++;
6182 return 0;
6183 }
6184 } else {
6185 /* make new entry for blocking to send SADB_ACQUIRE. */
6186 if ((newacq = key_newacq(saidx)) == NULL)
6187 return ENOBUFS;
6188
6189 /* add to acqtree */
6190 LIST_INSERT_HEAD(&acqtree, newacq, chain);
6191 }
6192 #endif
6193
6194
6195 #ifndef IPSEC_NONBLOCK_ACQUIRE
6196 seq = newacq->seq;
6197 #else
6198 seq = (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
6199 #endif
6200 m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
6201 if (!m) {
6202 error = ENOBUFS;
6203 goto fail;
6204 }
6205 result = m;
6206
6207 /* set sadb_address for saidx's. */
6208 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6209 &saidx->src.sa, FULLMASK, IPSEC_ULPROTO_ANY);
6210 if (!m) {
6211 error = ENOBUFS;
6212 goto fail;
6213 }
6214 m_cat(result, m);
6215
6216 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6217 &saidx->dst.sa, FULLMASK, IPSEC_ULPROTO_ANY);
6218 if (!m) {
6219 error = ENOBUFS;
6220 goto fail;
6221 }
6222 m_cat(result, m);
6223
6224 /* XXX proxy address (optional) */
6225
6226 /* set sadb_x_policy */
6227 if (sp) {
6228 m = key_setsadbxpolicy(sp->policy, sp->spidx.dir, sp->id);
6229 if (!m) {
6230 error = ENOBUFS;
6231 goto fail;
6232 }
6233 m_cat(result, m);
6234 }
6235
6236 /* XXX identity (optional) */
6237 #if 0
6238 if (idexttype && fqdn) {
6239 /* create identity extension (FQDN) */
6240 struct sadb_ident *id;
6241 int fqdnlen;
6242
6243 fqdnlen = strlen(fqdn) + 1; /* +1 for terminating-NUL */
6244 id = (struct sadb_ident *)p;
6245 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6246 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(fqdnlen));
6247 id->sadb_ident_exttype = idexttype;
6248 id->sadb_ident_type = SADB_IDENTTYPE_FQDN;
6249 memcpy(id + 1, fqdn, fqdnlen);
6250 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(fqdnlen);
6251 }
6252
6253 if (idexttype) {
6254 /* create identity extension (USERFQDN) */
6255 struct sadb_ident *id;
6256 int userfqdnlen;
6257
6258 if (userfqdn) {
6259 /* +1 for terminating-NUL */
6260 userfqdnlen = strlen(userfqdn) + 1;
6261 } else
6262 userfqdnlen = 0;
6263 id = (struct sadb_ident *)p;
6264 memset(id, 0, sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6265 id->sadb_ident_len = PFKEY_UNIT64(sizeof(*id) + PFKEY_ALIGN8(userfqdnlen));
6266 id->sadb_ident_exttype = idexttype;
6267 id->sadb_ident_type = SADB_IDENTTYPE_USERFQDN;
6268 /* XXX is it correct? */
6269 if (curlwp)
6270 id->sadb_ident_id = kauth_cred_getuid(curlwp->l_cred);
6271 if (userfqdn && userfqdnlen)
6272 memcpy(id + 1, userfqdn, userfqdnlen);
6273 p += sizeof(struct sadb_ident) + PFKEY_ALIGN8(userfqdnlen);
6274 }
6275 #endif
6276
6277 /* XXX sensitivity (optional) */
6278
6279 /* create proposal/combination extension */
6280 m = key_getprop(saidx);
6281 #if 0
6282 /*
6283 * spec conformant: always attach proposal/combination extension,
6284 * the problem is that we have no way to attach it for ipcomp,
6285 * due to the way sadb_comb is declared in RFC2367.
6286 */
6287 if (!m) {
6288 error = ENOBUFS;
6289 goto fail;
6290 }
6291 m_cat(result, m);
6292 #else
6293 /*
6294 * outside of spec; make proposal/combination extension optional.
6295 */
6296 if (m)
6297 m_cat(result, m);
6298 #endif
6299
6300 if ((result->m_flags & M_PKTHDR) == 0) {
6301 error = EINVAL;
6302 goto fail;
6303 }
6304
6305 if (result->m_len < sizeof(struct sadb_msg)) {
6306 result = m_pullup(result, sizeof(struct sadb_msg));
6307 if (result == NULL) {
6308 error = ENOBUFS;
6309 goto fail;
6310 }
6311 }
6312
6313 result->m_pkthdr.len = 0;
6314 for (m = result; m; m = m->m_next)
6315 result->m_pkthdr.len += m->m_len;
6316
6317 mtod(result, struct sadb_msg *)->sadb_msg_len =
6318 PFKEY_UNIT64(result->m_pkthdr.len);
6319
6320 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6321
6322 fail:
6323 if (result)
6324 m_freem(result);
6325 return error;
6326 }
6327
6328 #ifndef IPSEC_NONBLOCK_ACQUIRE
6329 static struct secacq *
6330 key_newacq(const struct secasindex *saidx)
6331 {
6332 struct secacq *newacq;
6333
6334 /* get new entry */
6335 KMALLOC(newacq, struct secacq *, sizeof(struct secacq));
6336 if (newacq == NULL) {
6337 ipseclog((LOG_DEBUG, "key_newacq: No more memory.\n"));
6338 return NULL;
6339 }
6340 memset(newacq, 0, sizeof(*newacq));
6341
6342 /* copy secindex */
6343 memcpy(&newacq->saidx, saidx, sizeof(newacq->saidx));
6344 newacq->seq = (acq_seq == ~0 ? 1 : ++acq_seq);
6345 newacq->created = time_second;
6346 newacq->count = 0;
6347
6348 return newacq;
6349 }
6350
6351 static struct secacq *
6352 key_getacq(const struct secasindex *saidx)
6353 {
6354 struct secacq *acq;
6355
6356 LIST_FOREACH(acq, &acqtree, chain) {
6357 if (key_cmpsaidx(saidx, &acq->saidx, CMP_EXACTLY))
6358 return acq;
6359 }
6360
6361 return NULL;
6362 }
6363
6364 static struct secacq *
6365 key_getacqbyseq(u_int32_t seq)
6366 {
6367 struct secacq *acq;
6368
6369 LIST_FOREACH(acq, &acqtree, chain) {
6370 if (acq->seq == seq)
6371 return acq;
6372 }
6373
6374 return NULL;
6375 }
6376 #endif
6377
6378 static struct secspacq *
6379 key_newspacq(struct secpolicyindex *spidx)
6380 {
6381 struct secspacq *acq;
6382
6383 /* get new entry */
6384 KMALLOC(acq, struct secspacq *, sizeof(struct secspacq));
6385 if (acq == NULL) {
6386 ipseclog((LOG_DEBUG, "key_newspacq: No more memory.\n"));
6387 return NULL;
6388 }
6389 memset(acq, 0, sizeof(*acq));
6390
6391 /* copy secindex */
6392 memcpy(&acq->spidx, spidx, sizeof(acq->spidx));
6393 acq->created = time_second;
6394 acq->count = 0;
6395
6396 return acq;
6397 }
6398
6399 static struct secspacq *
6400 key_getspacq(struct secpolicyindex *spidx)
6401 {
6402 struct secspacq *acq;
6403
6404 LIST_FOREACH(acq, &spacqtree, chain) {
6405 if (key_cmpspidx_exactly(spidx, &acq->spidx))
6406 return acq;
6407 }
6408
6409 return NULL;
6410 }
6411
6412 /*
6413 * SADB_ACQUIRE processing,
6414 * in first situation, is receiving
6415 * <base>
6416 * from the ikmpd, and clear sequence of its secasvar entry.
6417 *
6418 * In second situation, is receiving
6419 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6420 * from a user land process, and return
6421 * <base, address(SD), (address(P),) (identity(SD),) (sensitivity,) proposal>
6422 * to the socket.
6423 *
6424 * m will always be freed.
6425 */
6426 static int
6427 key_acquire2(struct socket *so, struct mbuf *m,
6428 const struct sadb_msghdr *mhp)
6429 {
6430 const struct sadb_address *src0, *dst0;
6431 struct secasindex saidx;
6432 struct secashead *sah;
6433 u_int16_t proto;
6434 int error;
6435
6436 /* sanity check */
6437 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6438 panic("key_acquire2: NULL pointer is passed");
6439
6440 /*
6441 * Error message from KMd.
6442 * We assume that if error was occurred in IKEd, the length of PFKEY
6443 * message is equal to the size of sadb_msg structure.
6444 * We do not raise error even if error occurred in this function.
6445 */
6446 if (mhp->msg->sadb_msg_len == PFKEY_UNIT64(sizeof(struct sadb_msg))) {
6447 #ifndef IPSEC_NONBLOCK_ACQUIRE
6448 struct secacq *acq;
6449
6450 /* check sequence number */
6451 if (mhp->msg->sadb_msg_seq == 0) {
6452 ipseclog((LOG_DEBUG, "key_acquire2: must specify sequence number.\n"));
6453 m_freem(m);
6454 return 0;
6455 }
6456
6457 if ((acq = key_getacqbyseq(mhp->msg->sadb_msg_seq)) == NULL) {
6458 /*
6459 * the specified larval SA is already gone, or we got
6460 * a bogus sequence number. we can silently ignore it.
6461 */
6462 m_freem(m);
6463 return 0;
6464 }
6465
6466 /* reset acq counter in order to deletion by timehander. */
6467 acq->created = time_second;
6468 acq->count = 0;
6469 #endif
6470 m_freem(m);
6471 return 0;
6472 }
6473
6474 /*
6475 * This message is from user land.
6476 */
6477
6478 /* map satype to proto */
6479 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6480 ipseclog((LOG_DEBUG, "key_acquire2: invalid satype is passed.\n"));
6481 return key_senderror(so, m, EINVAL);
6482 }
6483
6484 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
6485 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
6486 mhp->ext[SADB_EXT_PROPOSAL] == NULL) {
6487 /* error */
6488 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6489 return key_senderror(so, m, EINVAL);
6490 }
6491 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
6492 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
6493 mhp->extlen[SADB_EXT_PROPOSAL] < sizeof(struct sadb_prop)) {
6494 /* error */
6495 ipseclog((LOG_DEBUG, "key_acquire2: invalid message is passed.\n"));
6496 return key_senderror(so, m, EINVAL);
6497 }
6498
6499 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
6500 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
6501
6502 if ((error = key_setsecasidx(proto, IPSEC_MODE_ANY, 0, src0 + 1,
6503 dst0 + 1, &saidx)) != 0)
6504 return key_senderror(so, m, EINVAL);
6505
6506 /* get a SA index */
6507 LIST_FOREACH(sah, &sahtree, chain) {
6508 if (sah->state == SADB_SASTATE_DEAD)
6509 continue;
6510 if (key_cmpsaidx(&sah->saidx, &saidx, CMP_MODE_REQID))
6511 break;
6512 }
6513 if (sah != NULL) {
6514 ipseclog((LOG_DEBUG, "key_acquire2: a SA exists already.\n"));
6515 return key_senderror(so, m, EEXIST);
6516 }
6517
6518 error = key_acquire(&saidx, NULL);
6519 if (error != 0) {
6520 ipseclog((LOG_DEBUG, "key_acquire2: error %d returned "
6521 "from key_acquire.\n", mhp->msg->sadb_msg_errno));
6522 return key_senderror(so, m, error);
6523 }
6524
6525 return key_sendup_mbuf(so, m, KEY_SENDUP_REGISTERED);
6526 }
6527
6528 /*
6529 * SADB_REGISTER processing.
6530 * If SATYPE_UNSPEC has been passed as satype, only return sabd_supported.
6531 * receive
6532 * <base>
6533 * from the ikmpd, and register a socket to send PF_KEY messages,
6534 * and send
6535 * <base, supported>
6536 * to KMD by PF_KEY.
6537 * If socket is detached, must free from regnode.
6538 *
6539 * m will always be freed.
6540 */
6541 static int
6542 key_register(struct socket *so, struct mbuf *m,
6543 const struct sadb_msghdr *mhp)
6544 {
6545 struct secreg *reg, *newreg = 0;
6546
6547 /* sanity check */
6548 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
6549 panic("key_register: NULL pointer is passed");
6550
6551 /* check for invalid register message */
6552 if (mhp->msg->sadb_msg_satype >= sizeof(regtree)/sizeof(regtree[0]))
6553 return key_senderror(so, m, EINVAL);
6554
6555 /* When SATYPE_UNSPEC is specified, only return sabd_supported. */
6556 if (mhp->msg->sadb_msg_satype == SADB_SATYPE_UNSPEC)
6557 goto setmsg;
6558
6559 /* check whether existing or not */
6560 LIST_FOREACH(reg, &regtree[mhp->msg->sadb_msg_satype], chain) {
6561 if (reg->so == so) {
6562 ipseclog((LOG_DEBUG, "key_register: socket exists already.\n"));
6563 return key_senderror(so, m, EEXIST);
6564 }
6565 }
6566
6567 /* create regnode */
6568 KMALLOC(newreg, struct secreg *, sizeof(*newreg));
6569 if (newreg == NULL) {
6570 ipseclog((LOG_DEBUG, "key_register: No more memory.\n"));
6571 return key_senderror(so, m, ENOBUFS);
6572 }
6573 memset(newreg, 0, sizeof(*newreg));
6574
6575 newreg->so = so;
6576 ((struct keycb *)sotorawcb(so))->kp_registered++;
6577
6578 /* add regnode to regtree. */
6579 LIST_INSERT_HEAD(&regtree[mhp->msg->sadb_msg_satype], newreg, chain);
6580
6581 setmsg:
6582 {
6583 struct mbuf *n;
6584 struct sadb_msg *newmsg;
6585 struct sadb_supported *sup;
6586 u_int len, alen, elen;
6587 int off;
6588 int i;
6589 struct sadb_alg *alg;
6590
6591 /* create new sadb_msg to reply. */
6592 alen = 0;
6593 for (i = 1; i <= SADB_AALG_MAX; i++) {
6594 if (ah_algorithm_lookup(i))
6595 alen += sizeof(struct sadb_alg);
6596 }
6597 if (alen)
6598 alen += sizeof(struct sadb_supported);
6599 elen = 0;
6600 for (i = 1; i <= SADB_EALG_MAX; i++) {
6601 if (esp_algorithm_lookup(i))
6602 elen += sizeof(struct sadb_alg);
6603 }
6604 if (elen)
6605 elen += sizeof(struct sadb_supported);
6606
6607 len = sizeof(struct sadb_msg) + alen + elen;
6608
6609 if (len > MCLBYTES)
6610 return key_senderror(so, m, ENOBUFS);
6611
6612 MGETHDR(n, M_DONTWAIT, MT_DATA);
6613 if (len > MHLEN) {
6614 MCLGET(n, M_DONTWAIT);
6615 if ((n->m_flags & M_EXT) == 0) {
6616 m_freem(n);
6617 n = NULL;
6618 }
6619 }
6620 if (!n)
6621 return key_senderror(so, m, ENOBUFS);
6622
6623 n->m_pkthdr.len = n->m_len = len;
6624 n->m_next = NULL;
6625 off = 0;
6626
6627 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, char *) + off);
6628 newmsg = mtod(n, struct sadb_msg *);
6629 newmsg->sadb_msg_errno = 0;
6630 newmsg->sadb_msg_len = PFKEY_UNIT64(len);
6631 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
6632
6633 /* for authentication algorithm */
6634 if (alen) {
6635 sup = (struct sadb_supported *)(mtod(n, char *) + off);
6636 sup->sadb_supported_len = PFKEY_UNIT64(alen);
6637 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_AUTH;
6638 off += PFKEY_ALIGN8(sizeof(*sup));
6639
6640 for (i = 1; i <= SADB_AALG_MAX; i++) {
6641 struct auth_hash *aalgo;
6642 u_int16_t minkeysize, maxkeysize;
6643
6644 aalgo = ah_algorithm_lookup(i);
6645 if (!aalgo)
6646 continue;
6647 alg = (struct sadb_alg *)(mtod(n, char *) + off);
6648 alg->sadb_alg_id = i;
6649 alg->sadb_alg_ivlen = 0;
6650 key_getsizes_ah(aalgo, i, &minkeysize, &maxkeysize);
6651 alg->sadb_alg_minbits = _BITS(minkeysize);
6652 alg->sadb_alg_maxbits = _BITS(maxkeysize);
6653 off += PFKEY_ALIGN8(sizeof(*alg));
6654 }
6655 }
6656
6657 /* for encryption algorithm */
6658 if (elen) {
6659 sup = (struct sadb_supported *)(mtod(n, char *) + off);
6660 sup->sadb_supported_len = PFKEY_UNIT64(elen);
6661 sup->sadb_supported_exttype = SADB_EXT_SUPPORTED_ENCRYPT;
6662 off += PFKEY_ALIGN8(sizeof(*sup));
6663
6664 for (i = 1; i <= SADB_EALG_MAX; i++) {
6665 struct enc_xform *ealgo;
6666
6667 ealgo = esp_algorithm_lookup(i);
6668 if (!ealgo)
6669 continue;
6670 alg = (struct sadb_alg *)(mtod(n, char *) + off);
6671 alg->sadb_alg_id = i;
6672 alg->sadb_alg_ivlen = ealgo->blocksize;
6673 alg->sadb_alg_minbits = _BITS(ealgo->minkey);
6674 alg->sadb_alg_maxbits = _BITS(ealgo->maxkey);
6675 off += PFKEY_ALIGN8(sizeof(struct sadb_alg));
6676 }
6677 }
6678
6679 #ifdef DIAGNOSTIC
6680 if (off != len)
6681 panic("length assumption failed in key_register");
6682 #endif
6683
6684 m_freem(m);
6685 return key_sendup_mbuf(so, n, KEY_SENDUP_REGISTERED);
6686 }
6687 }
6688
6689 /*
6690 * free secreg entry registered.
6691 * XXX: I want to do free a socket marked done SADB_RESIGER to socket.
6692 */
6693 void
6694 key_freereg(struct socket *so)
6695 {
6696 struct secreg *reg;
6697 int i;
6698
6699 /* sanity check */
6700 if (so == NULL)
6701 panic("key_freereg: NULL pointer is passed");
6702
6703 /*
6704 * check whether existing or not.
6705 * check all type of SA, because there is a potential that
6706 * one socket is registered to multiple type of SA.
6707 */
6708 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
6709 LIST_FOREACH(reg, &regtree[i], chain) {
6710 if (reg->so == so
6711 && __LIST_CHAINED(reg)) {
6712 LIST_REMOVE(reg, chain);
6713 KFREE(reg);
6714 break;
6715 }
6716 }
6717 }
6718
6719 return;
6720 }
6721
6722 /*
6723 * SADB_EXPIRE processing
6724 * send
6725 * <base, SA, SA2, lifetime(C and one of HS), address(SD)>
6726 * to KMD by PF_KEY.
6727 * NOTE: We send only soft lifetime extension.
6728 *
6729 * OUT: 0 : succeed
6730 * others : error number
6731 */
6732 static int
6733 key_expire(struct secasvar *sav)
6734 {
6735 int s;
6736 int satype;
6737 struct mbuf *result = NULL, *m;
6738 int len;
6739 int error = -1;
6740 struct sadb_lifetime *lt;
6741
6742 /* XXX: Why do we lock ? */
6743 s = splsoftnet(); /*called from softclock()*/
6744
6745 /* sanity check */
6746 if (sav == NULL)
6747 panic("key_expire: NULL pointer is passed");
6748 if (sav->sah == NULL)
6749 panic("key_expire: Why was SA index in SA NULL");
6750 if ((satype = key_proto2satype(sav->sah->saidx.proto)) == 0)
6751 panic("key_expire: invalid proto is passed");
6752
6753 /* set msg header */
6754 m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
6755 if (!m) {
6756 error = ENOBUFS;
6757 goto fail;
6758 }
6759 result = m;
6760
6761 /* create SA extension */
6762 m = key_setsadbsa(sav);
6763 if (!m) {
6764 error = ENOBUFS;
6765 goto fail;
6766 }
6767 m_cat(result, m);
6768
6769 /* create SA extension */
6770 m = key_setsadbxsa2(sav->sah->saidx.mode,
6771 sav->replay ? sav->replay->count : 0,
6772 sav->sah->saidx.reqid);
6773 if (!m) {
6774 error = ENOBUFS;
6775 goto fail;
6776 }
6777 m_cat(result, m);
6778
6779 /* create lifetime extension (current and soft) */
6780 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
6781 m = key_alloc_mbuf(len);
6782 if (!m || m->m_next) { /*XXX*/
6783 if (m)
6784 m_freem(m);
6785 error = ENOBUFS;
6786 goto fail;
6787 }
6788 memset(mtod(m, void *), 0, len);
6789 lt = mtod(m, struct sadb_lifetime *);
6790 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
6791 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
6792 lt->sadb_lifetime_allocations = sav->lft_c->sadb_lifetime_allocations;
6793 lt->sadb_lifetime_bytes = sav->lft_c->sadb_lifetime_bytes;
6794 lt->sadb_lifetime_addtime = sav->lft_c->sadb_lifetime_addtime;
6795 lt->sadb_lifetime_usetime = sav->lft_c->sadb_lifetime_usetime;
6796 lt = (struct sadb_lifetime *)(mtod(m, char *) + len / 2);
6797 memcpy(lt, sav->lft_s, sizeof(*lt));
6798 m_cat(result, m);
6799
6800 /* set sadb_address for source */
6801 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
6802 &sav->sah->saidx.src.sa,
6803 FULLMASK, IPSEC_ULPROTO_ANY);
6804 if (!m) {
6805 error = ENOBUFS;
6806 goto fail;
6807 }
6808 m_cat(result, m);
6809
6810 /* set sadb_address for destination */
6811 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
6812 &sav->sah->saidx.dst.sa,
6813 FULLMASK, IPSEC_ULPROTO_ANY);
6814 if (!m) {
6815 error = ENOBUFS;
6816 goto fail;
6817 }
6818 m_cat(result, m);
6819
6820 if ((result->m_flags & M_PKTHDR) == 0) {
6821 error = EINVAL;
6822 goto fail;
6823 }
6824
6825 if (result->m_len < sizeof(struct sadb_msg)) {
6826 result = m_pullup(result, sizeof(struct sadb_msg));
6827 if (result == NULL) {
6828 error = ENOBUFS;
6829 goto fail;
6830 }
6831 }
6832
6833 result->m_pkthdr.len = 0;
6834 for (m = result; m; m = m->m_next)
6835 result->m_pkthdr.len += m->m_len;
6836
6837 mtod(result, struct sadb_msg *)->sadb_msg_len =
6838 PFKEY_UNIT64(result->m_pkthdr.len);
6839
6840 splx(s);
6841 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
6842
6843 fail:
6844 if (result)
6845 m_freem(result);
6846 splx(s);
6847 return error;
6848 }
6849
6850 /*
6851 * SADB_FLUSH processing
6852 * receive
6853 * <base>
6854 * from the ikmpd, and free all entries in secastree.
6855 * and send,
6856 * <base>
6857 * to the ikmpd.
6858 * NOTE: to do is only marking SADB_SASTATE_DEAD.
6859 *
6860 * m will always be freed.
6861 */
6862 static int
6863 key_flush(struct socket *so, struct mbuf *m,
6864 const struct sadb_msghdr *mhp)
6865 {
6866 struct sadb_msg *newmsg;
6867 struct secashead *sah, *nextsah;
6868 struct secasvar *sav, *nextsav;
6869 u_int16_t proto;
6870 u_int8_t state;
6871 u_int stateidx;
6872
6873 /* sanity check */
6874 if (so == NULL || mhp == NULL || mhp->msg == NULL)
6875 panic("key_flush: NULL pointer is passed");
6876
6877 /* map satype to proto */
6878 if ((proto = key_satype2proto(mhp->msg->sadb_msg_satype)) == 0) {
6879 ipseclog((LOG_DEBUG, "key_flush: invalid satype is passed.\n"));
6880 return key_senderror(so, m, EINVAL);
6881 }
6882
6883 /* no SATYPE specified, i.e. flushing all SA. */
6884 for (sah = LIST_FIRST(&sahtree);
6885 sah != NULL;
6886 sah = nextsah) {
6887 nextsah = LIST_NEXT(sah, chain);
6888
6889 if (mhp->msg->sadb_msg_satype != SADB_SATYPE_UNSPEC
6890 && proto != sah->saidx.proto)
6891 continue;
6892
6893 for (stateidx = 0;
6894 stateidx < _ARRAYLEN(saorder_state_alive);
6895 stateidx++) {
6896 state = saorder_state_any[stateidx];
6897 for (sav = LIST_FIRST(&sah->savtree[state]);
6898 sav != NULL;
6899 sav = nextsav) {
6900
6901 nextsav = LIST_NEXT(sav, chain);
6902
6903 key_sa_chgstate(sav, SADB_SASTATE_DEAD);
6904 KEY_FREESAV(&sav);
6905 }
6906 }
6907
6908 sah->state = SADB_SASTATE_DEAD;
6909 }
6910
6911 if (m->m_len < sizeof(struct sadb_msg) ||
6912 sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
6913 ipseclog((LOG_DEBUG, "key_flush: No more memory.\n"));
6914 return key_senderror(so, m, ENOBUFS);
6915 }
6916
6917 if (m->m_next)
6918 m_freem(m->m_next);
6919 m->m_next = NULL;
6920 m->m_pkthdr.len = m->m_len = sizeof(struct sadb_msg);
6921 newmsg = mtod(m, struct sadb_msg *);
6922 newmsg->sadb_msg_errno = 0;
6923 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
6924
6925 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
6926 }
6927
6928
6929 static struct mbuf *
6930 key_setdump_chain(u_int8_t req_satype, int *errorp, int *lenp, pid_t pid)
6931 {
6932 struct secashead *sah;
6933 struct secasvar *sav;
6934 u_int16_t proto;
6935 u_int stateidx;
6936 u_int8_t satype;
6937 u_int8_t state;
6938 int cnt;
6939 struct mbuf *m, *n, *prev;
6940 int totlen;
6941
6942 *lenp = 0;
6943
6944 /* map satype to proto */
6945 if ((proto = key_satype2proto(req_satype)) == 0) {
6946 *errorp = EINVAL;
6947 return (NULL);
6948 }
6949
6950 /* count sav entries to be sent to userland. */
6951 cnt = 0;
6952 LIST_FOREACH(sah, &sahtree, chain) {
6953 if (req_satype != SADB_SATYPE_UNSPEC &&
6954 proto != sah->saidx.proto)
6955 continue;
6956
6957 for (stateidx = 0;
6958 stateidx < _ARRAYLEN(saorder_state_any);
6959 stateidx++) {
6960 state = saorder_state_any[stateidx];
6961 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6962 cnt++;
6963 }
6964 }
6965 }
6966
6967 if (cnt == 0) {
6968 *errorp = ENOENT;
6969 return (NULL);
6970 }
6971
6972 /* send this to the userland, one at a time. */
6973 m = NULL;
6974 prev = m;
6975 LIST_FOREACH(sah, &sahtree, chain) {
6976 if (req_satype != SADB_SATYPE_UNSPEC &&
6977 proto != sah->saidx.proto)
6978 continue;
6979
6980 /* map proto to satype */
6981 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
6982 m_freem(m);
6983 *errorp = EINVAL;
6984 return (NULL);
6985 }
6986
6987 for (stateidx = 0;
6988 stateidx < _ARRAYLEN(saorder_state_any);
6989 stateidx++) {
6990 state = saorder_state_any[stateidx];
6991 LIST_FOREACH(sav, &sah->savtree[state], chain) {
6992 n = key_setdumpsa(sav, SADB_DUMP, satype,
6993 --cnt, pid);
6994 if (!n) {
6995 m_freem(m);
6996 *errorp = ENOBUFS;
6997 return (NULL);
6998 }
6999
7000 totlen += n->m_pkthdr.len;
7001 if (!m)
7002 m = n;
7003 else
7004 prev->m_nextpkt = n;
7005 prev = n;
7006 }
7007 }
7008 }
7009
7010 if (!m) {
7011 *errorp = EINVAL;
7012 return (NULL);
7013 }
7014
7015 if ((m->m_flags & M_PKTHDR) != 0) {
7016 m->m_pkthdr.len = 0;
7017 for (n = m; n; n = n->m_next)
7018 m->m_pkthdr.len += n->m_len;
7019 }
7020
7021 *errorp = 0;
7022 return (m);
7023 }
7024
7025 /*
7026 * SADB_DUMP processing
7027 * dump all entries including status of DEAD in SAD.
7028 * receive
7029 * <base>
7030 * from the ikmpd, and dump all secasvar leaves
7031 * and send,
7032 * <base> .....
7033 * to the ikmpd.
7034 *
7035 * m will always be freed.
7036 */
7037 static int
7038 key_dump(struct socket *so, struct mbuf *m0,
7039 const struct sadb_msghdr *mhp)
7040 {
7041 u_int16_t proto;
7042 u_int8_t satype;
7043 struct mbuf *n;
7044 int s;
7045 int error, len, ok;
7046
7047 /* sanity check */
7048 if (so == NULL || m0 == NULL || mhp == NULL || mhp->msg == NULL)
7049 panic("key_dump: NULL pointer is passed");
7050
7051 /* map satype to proto */
7052 satype = mhp->msg->sadb_msg_satype;
7053 if ((proto = key_satype2proto(satype)) == 0) {
7054 ipseclog((LOG_DEBUG, "key_dump: invalid satype is passed.\n"));
7055 return key_senderror(so, m0, EINVAL);
7056 }
7057
7058 /*
7059 * If the requestor has insufficient socket-buffer space
7060 * for the entire chain, nobody gets any response to the DUMP.
7061 * XXX For now, only the requestor ever gets anything.
7062 * Moreover, if the requestor has any space at all, they receive
7063 * the entire chain, otherwise the request is refused with ENOBUFS.
7064 */
7065 if (sbspace(&so->so_rcv) <= 0) {
7066 return key_senderror(so, m0, ENOBUFS);
7067 }
7068
7069 s = splsoftnet();
7070 n = key_setdump_chain(satype, &error, &len, mhp->msg->sadb_msg_pid);
7071 splx(s);
7072
7073 if (n == NULL) {
7074 return key_senderror(so, m0, ENOENT);
7075 }
7076 {
7077 uint64_t *ps = PFKEY_STAT_GETREF();
7078 ps[PFKEY_STAT_IN_TOTAL]++;
7079 ps[PFKEY_STAT_IN_BYTES] += len;
7080 PFKEY_STAT_PUTREF();
7081 }
7082
7083 /*
7084 * PF_KEY DUMP responses are no longer broadcast to all PF_KEY sockets.
7085 * The requestor receives either the entire chain, or an
7086 * error message with ENOBUFS.
7087 *
7088 * sbappendaddrchain() takes the chain of entries, one
7089 * packet-record per SPD entry, prepends the key_src sockaddr
7090 * to each packet-record, links the sockaddr mbufs into a new
7091 * list of records, then appends the entire resulting
7092 * list to the requesting socket.
7093 */
7094 ok = sbappendaddrchain(&so->so_rcv, (struct sockaddr *)&key_src,
7095 n, SB_PRIO_ONESHOT_OVERFLOW);
7096
7097 if (!ok) {
7098 PFKEY_STATINC(PFKEY_STAT_IN_NOMEM);
7099 m_freem(n);
7100 return key_senderror(so, m0, ENOBUFS);
7101 }
7102
7103 m_freem(m0);
7104 return 0;
7105 }
7106
7107 /*
7108 * SADB_X_PROMISC processing
7109 *
7110 * m will always be freed.
7111 */
7112 static int
7113 key_promisc(struct socket *so, struct mbuf *m,
7114 const struct sadb_msghdr *mhp)
7115 {
7116 int olen;
7117
7118 /* sanity check */
7119 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
7120 panic("key_promisc: NULL pointer is passed");
7121
7122 olen = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7123
7124 if (olen < sizeof(struct sadb_msg)) {
7125 #if 1
7126 return key_senderror(so, m, EINVAL);
7127 #else
7128 m_freem(m);
7129 return 0;
7130 #endif
7131 } else if (olen == sizeof(struct sadb_msg)) {
7132 /* enable/disable promisc mode */
7133 struct keycb *kp;
7134
7135 if ((kp = (struct keycb *)sotorawcb(so)) == NULL)
7136 return key_senderror(so, m, EINVAL);
7137 mhp->msg->sadb_msg_errno = 0;
7138 switch (mhp->msg->sadb_msg_satype) {
7139 case 0:
7140 case 1:
7141 kp->kp_promisc = mhp->msg->sadb_msg_satype;
7142 break;
7143 default:
7144 return key_senderror(so, m, EINVAL);
7145 }
7146
7147 /* send the original message back to everyone */
7148 mhp->msg->sadb_msg_errno = 0;
7149 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7150 } else {
7151 /* send packet as is */
7152
7153 m_adj(m, PFKEY_ALIGN8(sizeof(struct sadb_msg)));
7154
7155 /* TODO: if sadb_msg_seq is specified, send to specific pid */
7156 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
7157 }
7158 }
7159
7160 static int (*key_typesw[]) (struct socket *, struct mbuf *,
7161 const struct sadb_msghdr *) = {
7162 NULL, /* SADB_RESERVED */
7163 key_getspi, /* SADB_GETSPI */
7164 key_update, /* SADB_UPDATE */
7165 key_add, /* SADB_ADD */
7166 key_delete, /* SADB_DELETE */
7167 key_get, /* SADB_GET */
7168 key_acquire2, /* SADB_ACQUIRE */
7169 key_register, /* SADB_REGISTER */
7170 NULL, /* SADB_EXPIRE */
7171 key_flush, /* SADB_FLUSH */
7172 key_dump, /* SADB_DUMP */
7173 key_promisc, /* SADB_X_PROMISC */
7174 NULL, /* SADB_X_PCHANGE */
7175 key_spdadd, /* SADB_X_SPDUPDATE */
7176 key_spdadd, /* SADB_X_SPDADD */
7177 key_spddelete, /* SADB_X_SPDDELETE */
7178 key_spdget, /* SADB_X_SPDGET */
7179 NULL, /* SADB_X_SPDACQUIRE */
7180 key_spddump, /* SADB_X_SPDDUMP */
7181 key_spdflush, /* SADB_X_SPDFLUSH */
7182 key_spdadd, /* SADB_X_SPDSETIDX */
7183 NULL, /* SADB_X_SPDEXPIRE */
7184 key_spddelete2, /* SADB_X_SPDDELETE2 */
7185 #ifdef IPSEC_NAT_T
7186 key_nat_map, /* SADB_X_NAT_T_NEW_MAPPING */
7187 #endif
7188 };
7189
7190 /*
7191 * parse sadb_msg buffer to process PFKEYv2,
7192 * and create a data to response if needed.
7193 * I think to be dealed with mbuf directly.
7194 * IN:
7195 * msgp : pointer to pointer to a received buffer pulluped.
7196 * This is rewrited to response.
7197 * so : pointer to socket.
7198 * OUT:
7199 * length for buffer to send to user process.
7200 */
7201 int
7202 key_parse(struct mbuf *m, struct socket *so)
7203 {
7204 struct sadb_msg *msg;
7205 struct sadb_msghdr mh;
7206 u_int orglen;
7207 int error;
7208 int target;
7209
7210 /* sanity check */
7211 if (m == NULL || so == NULL)
7212 panic("key_parse: NULL pointer is passed");
7213
7214 #if 0 /*kdebug_sadb assumes msg in linear buffer*/
7215 KEYDEBUG(KEYDEBUG_KEY_DUMP,
7216 ipseclog((LOG_DEBUG, "key_parse: passed sadb_msg\n"));
7217 kdebug_sadb(msg));
7218 #endif
7219
7220 if (m->m_len < sizeof(struct sadb_msg)) {
7221 m = m_pullup(m, sizeof(struct sadb_msg));
7222 if (!m)
7223 return ENOBUFS;
7224 }
7225 msg = mtod(m, struct sadb_msg *);
7226 orglen = PFKEY_UNUNIT64(msg->sadb_msg_len);
7227 target = KEY_SENDUP_ONE;
7228
7229 if ((m->m_flags & M_PKTHDR) == 0 ||
7230 m->m_pkthdr.len != m->m_pkthdr.len) {
7231 ipseclog((LOG_DEBUG, "key_parse: invalid message length.\n"));
7232 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN);
7233 error = EINVAL;
7234 goto senderror;
7235 }
7236
7237 if (msg->sadb_msg_version != PF_KEY_V2) {
7238 ipseclog((LOG_DEBUG,
7239 "key_parse: PF_KEY version %u is mismatched.\n",
7240 msg->sadb_msg_version));
7241 PFKEY_STATINC(PFKEY_STAT_OUT_INVVER);
7242 error = EINVAL;
7243 goto senderror;
7244 }
7245
7246 if (msg->sadb_msg_type > SADB_MAX) {
7247 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
7248 msg->sadb_msg_type));
7249 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE);
7250 error = EINVAL;
7251 goto senderror;
7252 }
7253
7254 /* for old-fashioned code - should be nuked */
7255 if (m->m_pkthdr.len > MCLBYTES) {
7256 m_freem(m);
7257 return ENOBUFS;
7258 }
7259 if (m->m_next) {
7260 struct mbuf *n;
7261
7262 MGETHDR(n, M_DONTWAIT, MT_DATA);
7263 if (n && m->m_pkthdr.len > MHLEN) {
7264 MCLGET(n, M_DONTWAIT);
7265 if ((n->m_flags & M_EXT) == 0) {
7266 m_free(n);
7267 n = NULL;
7268 }
7269 }
7270 if (!n) {
7271 m_freem(m);
7272 return ENOBUFS;
7273 }
7274 m_copydata(m, 0, m->m_pkthdr.len, mtod(n, void *));
7275 n->m_pkthdr.len = n->m_len = m->m_pkthdr.len;
7276 n->m_next = NULL;
7277 m_freem(m);
7278 m = n;
7279 }
7280
7281 /* align the mbuf chain so that extensions are in contiguous region. */
7282 error = key_align(m, &mh);
7283 if (error)
7284 return error;
7285
7286 if (m->m_next) { /*XXX*/
7287 m_freem(m);
7288 return ENOBUFS;
7289 }
7290
7291 msg = mh.msg;
7292
7293 /* check SA type */
7294 switch (msg->sadb_msg_satype) {
7295 case SADB_SATYPE_UNSPEC:
7296 switch (msg->sadb_msg_type) {
7297 case SADB_GETSPI:
7298 case SADB_UPDATE:
7299 case SADB_ADD:
7300 case SADB_DELETE:
7301 case SADB_GET:
7302 case SADB_ACQUIRE:
7303 case SADB_EXPIRE:
7304 ipseclog((LOG_DEBUG, "key_parse: must specify satype "
7305 "when msg type=%u.\n", msg->sadb_msg_type));
7306 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE);
7307 error = EINVAL;
7308 goto senderror;
7309 }
7310 break;
7311 case SADB_SATYPE_AH:
7312 case SADB_SATYPE_ESP:
7313 case SADB_X_SATYPE_IPCOMP:
7314 case SADB_X_SATYPE_TCPSIGNATURE:
7315 switch (msg->sadb_msg_type) {
7316 case SADB_X_SPDADD:
7317 case SADB_X_SPDDELETE:
7318 case SADB_X_SPDGET:
7319 case SADB_X_SPDDUMP:
7320 case SADB_X_SPDFLUSH:
7321 case SADB_X_SPDSETIDX:
7322 case SADB_X_SPDUPDATE:
7323 case SADB_X_SPDDELETE2:
7324 ipseclog((LOG_DEBUG, "key_parse: illegal satype=%u\n",
7325 msg->sadb_msg_type));
7326 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE);
7327 error = EINVAL;
7328 goto senderror;
7329 }
7330 break;
7331 case SADB_SATYPE_RSVP:
7332 case SADB_SATYPE_OSPFV2:
7333 case SADB_SATYPE_RIPV2:
7334 case SADB_SATYPE_MIP:
7335 ipseclog((LOG_DEBUG, "key_parse: type %u isn't supported.\n",
7336 msg->sadb_msg_satype));
7337 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE);
7338 error = EOPNOTSUPP;
7339 goto senderror;
7340 case 1: /* XXX: What does it do? */
7341 if (msg->sadb_msg_type == SADB_X_PROMISC)
7342 break;
7343 /*FALLTHROUGH*/
7344 default:
7345 ipseclog((LOG_DEBUG, "key_parse: invalid type %u is passed.\n",
7346 msg->sadb_msg_satype));
7347 PFKEY_STATINC(PFKEY_STAT_OUT_INVSATYPE);
7348 error = EINVAL;
7349 goto senderror;
7350 }
7351
7352 /* check field of upper layer protocol and address family */
7353 if (mh.ext[SADB_EXT_ADDRESS_SRC] != NULL
7354 && mh.ext[SADB_EXT_ADDRESS_DST] != NULL) {
7355 struct sadb_address *src0, *dst0;
7356 u_int plen;
7357
7358 src0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_SRC]);
7359 dst0 = (struct sadb_address *)(mh.ext[SADB_EXT_ADDRESS_DST]);
7360
7361 /* check upper layer protocol */
7362 if (src0->sadb_address_proto != dst0->sadb_address_proto) {
7363 ipseclog((LOG_DEBUG, "key_parse: upper layer protocol mismatched.\n"));
7364 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7365 error = EINVAL;
7366 goto senderror;
7367 }
7368
7369 /* check family */
7370 if (PFKEY_ADDR_SADDR(src0)->sa_family !=
7371 PFKEY_ADDR_SADDR(dst0)->sa_family) {
7372 ipseclog((LOG_DEBUG, "key_parse: address family mismatched.\n"));
7373 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7374 error = EINVAL;
7375 goto senderror;
7376 }
7377 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7378 PFKEY_ADDR_SADDR(dst0)->sa_len) {
7379 ipseclog((LOG_DEBUG,
7380 "key_parse: address struct size mismatched.\n"));
7381 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7382 error = EINVAL;
7383 goto senderror;
7384 }
7385
7386 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7387 case AF_INET:
7388 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7389 sizeof(struct sockaddr_in)) {
7390 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7391 error = EINVAL;
7392 goto senderror;
7393 }
7394 break;
7395 case AF_INET6:
7396 if (PFKEY_ADDR_SADDR(src0)->sa_len !=
7397 sizeof(struct sockaddr_in6)) {
7398 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7399 error = EINVAL;
7400 goto senderror;
7401 }
7402 break;
7403 default:
7404 ipseclog((LOG_DEBUG,
7405 "key_parse: unsupported address family.\n"));
7406 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7407 error = EAFNOSUPPORT;
7408 goto senderror;
7409 }
7410
7411 switch (PFKEY_ADDR_SADDR(src0)->sa_family) {
7412 case AF_INET:
7413 plen = sizeof(struct in_addr) << 3;
7414 break;
7415 case AF_INET6:
7416 plen = sizeof(struct in6_addr) << 3;
7417 break;
7418 default:
7419 plen = 0; /*fool gcc*/
7420 break;
7421 }
7422
7423 /* check max prefix length */
7424 if (src0->sadb_address_prefixlen > plen ||
7425 dst0->sadb_address_prefixlen > plen) {
7426 ipseclog((LOG_DEBUG,
7427 "key_parse: illegal prefixlen.\n"));
7428 PFKEY_STATINC(PFKEY_STAT_OUT_INVADDR);
7429 error = EINVAL;
7430 goto senderror;
7431 }
7432
7433 /*
7434 * prefixlen == 0 is valid because there can be a case when
7435 * all addresses are matched.
7436 */
7437 }
7438
7439 if (msg->sadb_msg_type >= sizeof(key_typesw)/sizeof(key_typesw[0]) ||
7440 key_typesw[msg->sadb_msg_type] == NULL) {
7441 PFKEY_STATINC(PFKEY_STAT_OUT_INVMSGTYPE);
7442 error = EINVAL;
7443 goto senderror;
7444 }
7445
7446 return (*key_typesw[msg->sadb_msg_type])(so, m, &mh);
7447
7448 senderror:
7449 msg->sadb_msg_errno = error;
7450 return key_sendup_mbuf(so, m, target);
7451 }
7452
7453 static int
7454 key_senderror(struct socket *so, struct mbuf *m, int code)
7455 {
7456 struct sadb_msg *msg;
7457
7458 if (m->m_len < sizeof(struct sadb_msg))
7459 panic("invalid mbuf passed to key_senderror");
7460
7461 msg = mtod(m, struct sadb_msg *);
7462 msg->sadb_msg_errno = code;
7463 return key_sendup_mbuf(so, m, KEY_SENDUP_ONE);
7464 }
7465
7466 /*
7467 * set the pointer to each header into message buffer.
7468 * m will be freed on error.
7469 * XXX larger-than-MCLBYTES extension?
7470 */
7471 static int
7472 key_align(struct mbuf *m, struct sadb_msghdr *mhp)
7473 {
7474 struct mbuf *n;
7475 struct sadb_ext *ext;
7476 size_t off, end;
7477 int extlen;
7478 int toff;
7479
7480 /* sanity check */
7481 if (m == NULL || mhp == NULL)
7482 panic("key_align: NULL pointer is passed");
7483 if (m->m_len < sizeof(struct sadb_msg))
7484 panic("invalid mbuf passed to key_align");
7485
7486 /* initialize */
7487 memset(mhp, 0, sizeof(*mhp));
7488
7489 mhp->msg = mtod(m, struct sadb_msg *);
7490 mhp->ext[0] = (struct sadb_ext *)mhp->msg; /*XXX backward compat */
7491
7492 end = PFKEY_UNUNIT64(mhp->msg->sadb_msg_len);
7493 extlen = end; /*just in case extlen is not updated*/
7494 for (off = sizeof(struct sadb_msg); off < end; off += extlen) {
7495 n = m_pulldown(m, off, sizeof(struct sadb_ext), &toff);
7496 if (!n) {
7497 /* m is already freed */
7498 return ENOBUFS;
7499 }
7500 ext = (struct sadb_ext *)(mtod(n, char *) + toff);
7501
7502 /* set pointer */
7503 switch (ext->sadb_ext_type) {
7504 case SADB_EXT_SA:
7505 case SADB_EXT_ADDRESS_SRC:
7506 case SADB_EXT_ADDRESS_DST:
7507 case SADB_EXT_ADDRESS_PROXY:
7508 case SADB_EXT_LIFETIME_CURRENT:
7509 case SADB_EXT_LIFETIME_HARD:
7510 case SADB_EXT_LIFETIME_SOFT:
7511 case SADB_EXT_KEY_AUTH:
7512 case SADB_EXT_KEY_ENCRYPT:
7513 case SADB_EXT_IDENTITY_SRC:
7514 case SADB_EXT_IDENTITY_DST:
7515 case SADB_EXT_SENSITIVITY:
7516 case SADB_EXT_PROPOSAL:
7517 case SADB_EXT_SUPPORTED_AUTH:
7518 case SADB_EXT_SUPPORTED_ENCRYPT:
7519 case SADB_EXT_SPIRANGE:
7520 case SADB_X_EXT_POLICY:
7521 case SADB_X_EXT_SA2:
7522 #ifdef IPSEC_NAT_T
7523 case SADB_X_EXT_NAT_T_TYPE:
7524 case SADB_X_EXT_NAT_T_SPORT:
7525 case SADB_X_EXT_NAT_T_DPORT:
7526 case SADB_X_EXT_NAT_T_OA:
7527 case SADB_X_EXT_NAT_T_FRAG:
7528 #endif
7529 /* duplicate check */
7530 /*
7531 * XXX Are there duplication payloads of either
7532 * KEY_AUTH or KEY_ENCRYPT ?
7533 */
7534 if (mhp->ext[ext->sadb_ext_type] != NULL) {
7535 ipseclog((LOG_DEBUG,
7536 "key_align: duplicate ext_type %u "
7537 "is passed.\n", ext->sadb_ext_type));
7538 m_freem(m);
7539 PFKEY_STATINC(PFKEY_STAT_OUT_DUPEXT);
7540 return EINVAL;
7541 }
7542 break;
7543 default:
7544 ipseclog((LOG_DEBUG,
7545 "key_align: invalid ext_type %u is passed.\n",
7546 ext->sadb_ext_type));
7547 m_freem(m);
7548 PFKEY_STATINC(PFKEY_STAT_OUT_INVEXTTYPE);
7549 return EINVAL;
7550 }
7551
7552 extlen = PFKEY_UNUNIT64(ext->sadb_ext_len);
7553
7554 if (key_validate_ext(ext, extlen)) {
7555 m_freem(m);
7556 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN);
7557 return EINVAL;
7558 }
7559
7560 n = m_pulldown(m, off, extlen, &toff);
7561 if (!n) {
7562 /* m is already freed */
7563 return ENOBUFS;
7564 }
7565 ext = (struct sadb_ext *)(mtod(n, char *) + toff);
7566
7567 mhp->ext[ext->sadb_ext_type] = ext;
7568 mhp->extoff[ext->sadb_ext_type] = off;
7569 mhp->extlen[ext->sadb_ext_type] = extlen;
7570 }
7571
7572 if (off != end) {
7573 m_freem(m);
7574 PFKEY_STATINC(PFKEY_STAT_OUT_INVLEN);
7575 return EINVAL;
7576 }
7577
7578 return 0;
7579 }
7580
7581 static int
7582 key_validate_ext(const struct sadb_ext *ext, int len)
7583 {
7584 const struct sockaddr *sa;
7585 enum { NONE, ADDR } checktype = NONE;
7586 int baselen = 0;
7587 const int sal = offsetof(struct sockaddr, sa_len) + sizeof(sa->sa_len);
7588
7589 if (len != PFKEY_UNUNIT64(ext->sadb_ext_len))
7590 return EINVAL;
7591
7592 /* if it does not match minimum/maximum length, bail */
7593 if (ext->sadb_ext_type >= sizeof(minsize) / sizeof(minsize[0]) ||
7594 ext->sadb_ext_type >= sizeof(maxsize) / sizeof(maxsize[0]))
7595 return EINVAL;
7596 if (!minsize[ext->sadb_ext_type] || len < minsize[ext->sadb_ext_type])
7597 return EINVAL;
7598 if (maxsize[ext->sadb_ext_type] && len > maxsize[ext->sadb_ext_type])
7599 return EINVAL;
7600
7601 /* more checks based on sadb_ext_type XXX need more */
7602 switch (ext->sadb_ext_type) {
7603 case SADB_EXT_ADDRESS_SRC:
7604 case SADB_EXT_ADDRESS_DST:
7605 case SADB_EXT_ADDRESS_PROXY:
7606 baselen = PFKEY_ALIGN8(sizeof(struct sadb_address));
7607 checktype = ADDR;
7608 break;
7609 case SADB_EXT_IDENTITY_SRC:
7610 case SADB_EXT_IDENTITY_DST:
7611 if (((const struct sadb_ident *)ext)->sadb_ident_type ==
7612 SADB_X_IDENTTYPE_ADDR) {
7613 baselen = PFKEY_ALIGN8(sizeof(struct sadb_ident));
7614 checktype = ADDR;
7615 } else
7616 checktype = NONE;
7617 break;
7618 default:
7619 checktype = NONE;
7620 break;
7621 }
7622
7623 switch (checktype) {
7624 case NONE:
7625 break;
7626 case ADDR:
7627 sa = (const struct sockaddr *)(((const u_int8_t*)ext)+baselen);
7628 if (len < baselen + sal)
7629 return EINVAL;
7630 if (baselen + PFKEY_ALIGN8(sa->sa_len) != len)
7631 return EINVAL;
7632 break;
7633 }
7634
7635 return 0;
7636 }
7637
7638 static int
7639 key_do_init(void)
7640 {
7641 int i;
7642
7643 pfkeystat_percpu = percpu_alloc(sizeof(uint64_t) * PFKEY_NSTATS);
7644
7645 callout_init(&key_timehandler_ch, 0);
7646
7647 for (i = 0; i < IPSEC_DIR_MAX; i++) {
7648 LIST_INIT(&sptree[i]);
7649 }
7650
7651 LIST_INIT(&sahtree);
7652
7653 for (i = 0; i <= SADB_SATYPE_MAX; i++) {
7654 LIST_INIT(&regtree[i]);
7655 }
7656
7657 #ifndef IPSEC_NONBLOCK_ACQUIRE
7658 LIST_INIT(&acqtree);
7659 #endif
7660 LIST_INIT(&spacqtree);
7661
7662 /* system default */
7663 ip4_def_policy.policy = IPSEC_POLICY_NONE;
7664 ip4_def_policy.refcnt++; /*never reclaim this*/
7665
7666 #ifdef INET6
7667 ip6_def_policy.policy = IPSEC_POLICY_NONE;
7668 ip6_def_policy.refcnt++; /*never reclaim this*/
7669 #endif
7670
7671
7672 #ifndef IPSEC_DEBUG2
7673 callout_reset(&key_timehandler_ch, hz, key_timehandler, NULL);
7674 #endif /*IPSEC_DEBUG2*/
7675
7676 /* initialize key statistics */
7677 keystat.getspi_count = 1;
7678
7679 printf("IPsec: Initialized Security Association Processing.\n");
7680
7681 return (0);
7682 }
7683
7684 void
7685 key_init(void)
7686 {
7687 static ONCE_DECL(key_init_once);
7688
7689 RUN_ONCE(&key_init_once, key_do_init);
7690 }
7691
7692 /*
7693 * XXX: maybe This function is called after INBOUND IPsec processing.
7694 *
7695 * Special check for tunnel-mode packets.
7696 * We must make some checks for consistency between inner and outer IP header.
7697 *
7698 * xxx more checks to be provided
7699 */
7700 int
7701 key_checktunnelsanity(
7702 struct secasvar *sav,
7703 u_int family,
7704 void *src,
7705 void *dst
7706 )
7707 {
7708 /* sanity check */
7709 if (sav->sah == NULL)
7710 panic("sav->sah == NULL at key_checktunnelsanity");
7711
7712 /* XXX: check inner IP header */
7713
7714 return 1;
7715 }
7716
7717 #if 0
7718 #define hostnamelen strlen(hostname)
7719
7720 /*
7721 * Get FQDN for the host.
7722 * If the administrator configured hostname (by hostname(1)) without
7723 * domain name, returns nothing.
7724 */
7725 static const char *
7726 key_getfqdn(void)
7727 {
7728 int i;
7729 int hasdot;
7730 static char fqdn[MAXHOSTNAMELEN + 1];
7731
7732 if (!hostnamelen)
7733 return NULL;
7734
7735 /* check if it comes with domain name. */
7736 hasdot = 0;
7737 for (i = 0; i < hostnamelen; i++) {
7738 if (hostname[i] == '.')
7739 hasdot++;
7740 }
7741 if (!hasdot)
7742 return NULL;
7743
7744 /* NOTE: hostname may not be NUL-terminated. */
7745 memset(fqdn, 0, sizeof(fqdn));
7746 memcpy(fqdn, hostname, hostnamelen);
7747 fqdn[hostnamelen] = '\0';
7748 return fqdn;
7749 }
7750
7751 /*
7752 * get username@FQDN for the host/user.
7753 */
7754 static const char *
7755 key_getuserfqdn(void)
7756 {
7757 const char *host;
7758 static char userfqdn[MAXHOSTNAMELEN + MAXLOGNAME + 2];
7759 struct proc *p = curproc;
7760 char *q;
7761
7762 if (!p || !p->p_pgrp || !p->p_pgrp->pg_session)
7763 return NULL;
7764 if (!(host = key_getfqdn()))
7765 return NULL;
7766
7767 /* NOTE: s_login may not be-NUL terminated. */
7768 memset(userfqdn, 0, sizeof(userfqdn));
7769 memcpy(userfqdn, Mp->p_pgrp->pg_session->s_login, AXLOGNAME);
7770 userfqdn[MAXLOGNAME] = '\0'; /* safeguard */
7771 q = userfqdn + strlen(userfqdn);
7772 *q++ = '@';
7773 memcpy(q, host, strlen(host));
7774 q += strlen(host);
7775 *q++ = '\0';
7776
7777 return userfqdn;
7778 }
7779 #endif
7780
7781 /* record data transfer on SA, and update timestamps */
7782 void
7783 key_sa_recordxfer(struct secasvar *sav, struct mbuf *m)
7784 {
7785 IPSEC_ASSERT(sav != NULL, ("key_sa_recordxfer: Null secasvar"));
7786 IPSEC_ASSERT(m != NULL, ("key_sa_recordxfer: Null mbuf"));
7787 if (!sav->lft_c)
7788 return;
7789
7790 /*
7791 * XXX Currently, there is a difference of bytes size
7792 * between inbound and outbound processing.
7793 */
7794 sav->lft_c->sadb_lifetime_bytes += m->m_pkthdr.len;
7795 /* to check bytes lifetime is done in key_timehandler(). */
7796
7797 /*
7798 * We use the number of packets as the unit of
7799 * sadb_lifetime_allocations. We increment the variable
7800 * whenever {esp,ah}_{in,out}put is called.
7801 */
7802 sav->lft_c->sadb_lifetime_allocations++;
7803 /* XXX check for expires? */
7804
7805 /*
7806 * NOTE: We record CURRENT sadb_lifetime_usetime by using wall clock,
7807 * in seconds. HARD and SOFT lifetime are measured by the time
7808 * difference (again in seconds) from sadb_lifetime_usetime.
7809 *
7810 * usetime
7811 * v expire expire
7812 * -----+-----+--------+---> t
7813 * <--------------> HARD
7814 * <-----> SOFT
7815 */
7816 sav->lft_c->sadb_lifetime_usetime = time_second;
7817 /* XXX check for expires? */
7818
7819 return;
7820 }
7821
7822 /* dumb version */
7823 void
7824 key_sa_routechange(struct sockaddr *dst)
7825 {
7826 struct secashead *sah;
7827 struct route *ro;
7828 const struct sockaddr *sa;
7829
7830 LIST_FOREACH(sah, &sahtree, chain) {
7831 ro = &sah->sa_route;
7832 sa = rtcache_getdst(ro);
7833 if (sa != NULL && dst->sa_len == sa->sa_len &&
7834 memcmp(dst, sa, dst->sa_len) == 0)
7835 rtcache_free(ro);
7836 }
7837
7838 return;
7839 }
7840
7841 static void
7842 key_sa_chgstate(struct secasvar *sav, u_int8_t state)
7843 {
7844 if (sav == NULL)
7845 panic("key_sa_chgstate called with sav == NULL");
7846
7847 if (sav->state == state)
7848 return;
7849
7850 if (__LIST_CHAINED(sav))
7851 LIST_REMOVE(sav, chain);
7852
7853 sav->state = state;
7854 LIST_INSERT_HEAD(&sav->sah->savtree[state], sav, chain);
7855 }
7856
7857 void
7858 key_sa_stir_iv(struct secasvar *sav)
7859 {
7860
7861 if (!sav->iv)
7862 panic("key_sa_stir_iv called with sav == NULL");
7863 key_randomfill(sav->iv, sav->ivlen);
7864 }
7865
7866 /* XXX too much? */
7867 static struct mbuf *
7868 key_alloc_mbuf(int l)
7869 {
7870 struct mbuf *m = NULL, *n;
7871 int len, t;
7872
7873 len = l;
7874 while (len > 0) {
7875 MGET(n, M_DONTWAIT, MT_DATA);
7876 if (n && len > MLEN)
7877 MCLGET(n, M_DONTWAIT);
7878 if (!n) {
7879 m_freem(m);
7880 return NULL;
7881 }
7882
7883 n->m_next = NULL;
7884 n->m_len = 0;
7885 n->m_len = M_TRAILINGSPACE(n);
7886 /* use the bottom of mbuf, hoping we can prepend afterwards */
7887 if (n->m_len > len) {
7888 t = (n->m_len - len) & ~(sizeof(long) - 1);
7889 n->m_data += t;
7890 n->m_len = len;
7891 }
7892
7893 len -= n->m_len;
7894
7895 if (m)
7896 m_cat(m, n);
7897 else
7898 m = n;
7899 }
7900
7901 return m;
7902 }
7903
7904 static struct mbuf *
7905 key_setdump(u_int8_t req_satype, int *errorp, uint32_t pid)
7906 {
7907 struct secashead *sah;
7908 struct secasvar *sav;
7909 u_int16_t proto;
7910 u_int stateidx;
7911 u_int8_t satype;
7912 u_int8_t state;
7913 int cnt;
7914 struct mbuf *m, *n;
7915
7916 /* map satype to proto */
7917 if ((proto = key_satype2proto(req_satype)) == 0) {
7918 *errorp = EINVAL;
7919 return (NULL);
7920 }
7921
7922 /* count sav entries to be sent to the userland. */
7923 cnt = 0;
7924 LIST_FOREACH(sah, &sahtree, chain) {
7925 if (req_satype != SADB_SATYPE_UNSPEC &&
7926 proto != sah->saidx.proto)
7927 continue;
7928
7929 for (stateidx = 0;
7930 stateidx < _ARRAYLEN(saorder_state_any);
7931 stateidx++) {
7932 state = saorder_state_any[stateidx];
7933 LIST_FOREACH(sav, &sah->savtree[state], chain) {
7934 cnt++;
7935 }
7936 }
7937 }
7938
7939 if (cnt == 0) {
7940 *errorp = ENOENT;
7941 return (NULL);
7942 }
7943
7944 /* send this to the userland, one at a time. */
7945 m = NULL;
7946 LIST_FOREACH(sah, &sahtree, chain) {
7947 if (req_satype != SADB_SATYPE_UNSPEC &&
7948 proto != sah->saidx.proto)
7949 continue;
7950
7951 /* map proto to satype */
7952 if ((satype = key_proto2satype(sah->saidx.proto)) == 0) {
7953 m_freem(m);
7954 *errorp = EINVAL;
7955 return (NULL);
7956 }
7957
7958 for (stateidx = 0;
7959 stateidx < _ARRAYLEN(saorder_state_any);
7960 stateidx++) {
7961 state = saorder_state_any[stateidx];
7962 LIST_FOREACH(sav, &sah->savtree[state], chain) {
7963 n = key_setdumpsa(sav, SADB_DUMP, satype,
7964 --cnt, pid);
7965 if (!n) {
7966 m_freem(m);
7967 *errorp = ENOBUFS;
7968 return (NULL);
7969 }
7970
7971 if (!m)
7972 m = n;
7973 else
7974 m_cat(m, n);
7975 }
7976 }
7977 }
7978
7979 if (!m) {
7980 *errorp = EINVAL;
7981 return (NULL);
7982 }
7983
7984 if ((m->m_flags & M_PKTHDR) != 0) {
7985 m->m_pkthdr.len = 0;
7986 for (n = m; n; n = n->m_next)
7987 m->m_pkthdr.len += n->m_len;
7988 }
7989
7990 *errorp = 0;
7991 return (m);
7992 }
7993
7994 static struct mbuf *
7995 key_setspddump(int *errorp, pid_t pid)
7996 {
7997 struct secpolicy *sp;
7998 int cnt;
7999 u_int dir;
8000 struct mbuf *m, *n;
8001
8002 /* search SPD entry and get buffer size. */
8003 cnt = 0;
8004 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
8005 LIST_FOREACH(sp, &sptree[dir], chain) {
8006 cnt++;
8007 }
8008 }
8009
8010 if (cnt == 0) {
8011 *errorp = ENOENT;
8012 return (NULL);
8013 }
8014
8015 m = NULL;
8016 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
8017 LIST_FOREACH(sp, &sptree[dir], chain) {
8018 --cnt;
8019 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt, pid);
8020
8021 if (!n) {
8022 *errorp = ENOBUFS;
8023 m_freem(m);
8024 return (NULL);
8025 }
8026 if (!m)
8027 m = n;
8028 else {
8029 m->m_pkthdr.len += n->m_pkthdr.len;
8030 m_cat(m, n);
8031 }
8032 }
8033 }
8034
8035 *errorp = 0;
8036 return (m);
8037 }
8038
8039 static int
8040 sysctl_net_key_dumpsa(SYSCTLFN_ARGS)
8041 {
8042 struct mbuf *m, *n;
8043 int err2 = 0;
8044 char *p, *ep;
8045 size_t len;
8046 int s, error;
8047
8048 if (newp)
8049 return (EPERM);
8050 if (namelen != 1)
8051 return (EINVAL);
8052
8053 s = splsoftnet();
8054 m = key_setdump(name[0], &error, l->l_proc->p_pid);
8055 splx(s);
8056 if (!m)
8057 return (error);
8058 if (!oldp)
8059 *oldlenp = m->m_pkthdr.len;
8060 else {
8061 p = oldp;
8062 if (*oldlenp < m->m_pkthdr.len) {
8063 err2 = ENOMEM;
8064 ep = p + *oldlenp;
8065 } else {
8066 *oldlenp = m->m_pkthdr.len;
8067 ep = p + m->m_pkthdr.len;
8068 }
8069 for (n = m; n; n = n->m_next) {
8070 len = (ep - p < n->m_len) ?
8071 ep - p : n->m_len;
8072 error = copyout(mtod(n, const void *), p, len);
8073 p += len;
8074 if (error)
8075 break;
8076 }
8077 if (error == 0)
8078 error = err2;
8079 }
8080 m_freem(m);
8081
8082 return (error);
8083 }
8084
8085 static int
8086 sysctl_net_key_dumpsp(SYSCTLFN_ARGS)
8087 {
8088 struct mbuf *m, *n;
8089 int err2 = 0;
8090 char *p, *ep;
8091 size_t len;
8092 int s, error;
8093
8094 if (newp)
8095 return (EPERM);
8096 if (namelen != 0)
8097 return (EINVAL);
8098
8099 s = splsoftnet();
8100 m = key_setspddump(&error, l->l_proc->p_pid);
8101 splx(s);
8102 if (!m)
8103 return (error);
8104 if (!oldp)
8105 *oldlenp = m->m_pkthdr.len;
8106 else {
8107 p = oldp;
8108 if (*oldlenp < m->m_pkthdr.len) {
8109 err2 = ENOMEM;
8110 ep = p + *oldlenp;
8111 } else {
8112 *oldlenp = m->m_pkthdr.len;
8113 ep = p + m->m_pkthdr.len;
8114 }
8115 for (n = m; n; n = n->m_next) {
8116 len = (ep - p < n->m_len) ?
8117 ep - p : n->m_len;
8118 error = copyout(mtod(n, const void *), p, len);
8119 p += len;
8120 if (error)
8121 break;
8122 }
8123 if (error == 0)
8124 error = err2;
8125 }
8126 m_freem(m);
8127
8128 return (error);
8129 }
8130
8131 /*
8132 * Create sysctl tree for native FAST_IPSEC key knobs, originally
8133 * under name "net.keyv2" * with MIB number { CTL_NET, PF_KEY_V2. }.
8134 * However, sysctl(8) never checked for nodes under { CTL_NET, PF_KEY_V2 };
8135 * and in any case the part of our sysctl namespace used for dumping the
8136 * SPD and SA database *HAS* to be compatible with the KAME sysctl
8137 * namespace, for API reasons.
8138 *
8139 * Pending a consensus on the right way to fix this, add a level of
8140 * indirection in how we number the `native' FAST_IPSEC key nodes;
8141 * and (as requested by Andrew Brown) move registration of the
8142 * KAME-compatible names to a separate function.
8143 */
8144 #if 0
8145 # define FAST_IPSEC_PFKEY PF_KEY_V2
8146 # define FAST_IPSEC_PFKEY_NAME "keyv2"
8147 #else
8148 # define FAST_IPSEC_PFKEY PF_KEY
8149 # define FAST_IPSEC_PFKEY_NAME "key"
8150 #endif
8151
8152 static int
8153 sysctl_net_key_stats(SYSCTLFN_ARGS)
8154 {
8155
8156 return (NETSTAT_SYSCTL(pfkeystat_percpu, PFKEY_NSTATS));
8157 }
8158
8159 SYSCTL_SETUP(sysctl_net_keyv2_setup, "sysctl net.keyv2 subtree setup")
8160 {
8161
8162 sysctl_createv(clog, 0, NULL, NULL,
8163 CTLFLAG_PERMANENT,
8164 CTLTYPE_NODE, "net", NULL,
8165 NULL, 0, NULL, 0,
8166 CTL_NET, CTL_EOL);
8167 sysctl_createv(clog, 0, NULL, NULL,
8168 CTLFLAG_PERMANENT,
8169 CTLTYPE_NODE, FAST_IPSEC_PFKEY_NAME, NULL,
8170 NULL, 0, NULL, 0,
8171 CTL_NET, FAST_IPSEC_PFKEY, CTL_EOL);
8172
8173 sysctl_createv(clog, 0, NULL, NULL,
8174 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8175 CTLTYPE_INT, "debug", NULL,
8176 NULL, 0, &key_debug_level, 0,
8177 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_DEBUG_LEVEL, CTL_EOL);
8178 sysctl_createv(clog, 0, NULL, NULL,
8179 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8180 CTLTYPE_INT, "spi_try", NULL,
8181 NULL, 0, &key_spi_trycnt, 0,
8182 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_TRY, CTL_EOL);
8183 sysctl_createv(clog, 0, NULL, NULL,
8184 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8185 CTLTYPE_INT, "spi_min_value", NULL,
8186 NULL, 0, &key_spi_minval, 0,
8187 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MIN_VALUE, CTL_EOL);
8188 sysctl_createv(clog, 0, NULL, NULL,
8189 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8190 CTLTYPE_INT, "spi_max_value", NULL,
8191 NULL, 0, &key_spi_maxval, 0,
8192 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_SPI_MAX_VALUE, CTL_EOL);
8193 sysctl_createv(clog, 0, NULL, NULL,
8194 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8195 CTLTYPE_INT, "random_int", NULL,
8196 NULL, 0, &key_int_random, 0,
8197 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_RANDOM_INT, CTL_EOL);
8198 sysctl_createv(clog, 0, NULL, NULL,
8199 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8200 CTLTYPE_INT, "larval_lifetime", NULL,
8201 NULL, 0, &key_larval_lifetime, 0,
8202 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_LARVAL_LIFETIME, CTL_EOL);
8203 sysctl_createv(clog, 0, NULL, NULL,
8204 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8205 CTLTYPE_INT, "blockacq_count", NULL,
8206 NULL, 0, &key_blockacq_count, 0,
8207 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_COUNT, CTL_EOL);
8208 sysctl_createv(clog, 0, NULL, NULL,
8209 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8210 CTLTYPE_INT, "blockacq_lifetime", NULL,
8211 NULL, 0, &key_blockacq_lifetime, 0,
8212 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_BLOCKACQ_LIFETIME, CTL_EOL);
8213 sysctl_createv(clog, 0, NULL, NULL,
8214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8215 CTLTYPE_INT, "esp_keymin", NULL,
8216 NULL, 0, &ipsec_esp_keymin, 0,
8217 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_KEYMIN, CTL_EOL);
8218 sysctl_createv(clog, 0, NULL, NULL,
8219 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8220 CTLTYPE_INT, "prefered_oldsa", NULL,
8221 NULL, 0, &key_prefered_oldsa, 0,
8222 CTL_NET, PF_KEY, KEYCTL_PREFERED_OLDSA, CTL_EOL);
8223 sysctl_createv(clog, 0, NULL, NULL,
8224 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8225 CTLTYPE_INT, "esp_auth", NULL,
8226 NULL, 0, &ipsec_esp_auth, 0,
8227 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_ESP_AUTH, CTL_EOL);
8228 sysctl_createv(clog, 0, NULL, NULL,
8229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
8230 CTLTYPE_INT, "ah_keymin", NULL,
8231 NULL, 0, &ipsec_ah_keymin, 0,
8232 CTL_NET, FAST_IPSEC_PFKEY, KEYCTL_AH_KEYMIN, CTL_EOL);
8233 sysctl_createv(clog, 0, NULL, NULL,
8234 CTLFLAG_PERMANENT,
8235 CTLTYPE_STRUCT, "stats",
8236 SYSCTL_DESCR("PF_KEY statistics"),
8237 sysctl_net_key_stats, 0, NULL, 0,
8238 CTL_NET, FAST_IPSEC_PFKEY, CTL_CREATE, CTL_EOL);
8239 }
8240
8241 /*
8242 * Register sysctl names used by setkey(8). For historical reasons,
8243 * and to share a single API, these names appear under { CTL_NET, PF_KEY }
8244 * for both FAST_IPSEC and KAME IPSEC.
8245 */
8246 SYSCTL_SETUP(sysctl_net_key_compat_setup, "sysctl net.key subtree setup for FAST_IPSEC")
8247 {
8248
8249 /* Make sure net.key exists before we register nodes underneath it. */
8250 sysctl_createv(clog, 0, NULL, NULL,
8251 CTLFLAG_PERMANENT,
8252 CTLTYPE_NODE, "net", NULL,
8253 NULL, 0, NULL, 0,
8254 CTL_NET, CTL_EOL);
8255 sysctl_createv(clog, 0, NULL, NULL,
8256 CTLFLAG_PERMANENT,
8257 CTLTYPE_NODE, "key", NULL,
8258 NULL, 0, NULL, 0,
8259 CTL_NET, PF_KEY, CTL_EOL);
8260
8261 /* Register the net.key.dump{sa,sp} nodes used by setkey(8). */
8262 sysctl_createv(clog, 0, NULL, NULL,
8263 CTLFLAG_PERMANENT,
8264 CTLTYPE_STRUCT, "dumpsa", NULL,
8265 sysctl_net_key_dumpsa, 0, NULL, 0,
8266 CTL_NET, PF_KEY, KEYCTL_DUMPSA, CTL_EOL);
8267 sysctl_createv(clog, 0, NULL, NULL,
8268 CTLFLAG_PERMANENT,
8269 CTLTYPE_STRUCT, "dumpsp", NULL,
8270 sysctl_net_key_dumpsp, 0, NULL, 0,
8271 CTL_NET, PF_KEY, KEYCTL_DUMPSP, CTL_EOL);
8272 }
NetBSD on the FriendlyARM MINI2440