Parallelize in_ifaddrhead operation
[dragonfly.git] / sys / netproto / key / key.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netkey/key.c,v 1.16.2.13 2002/07/24 18:17:40 ume Exp $ */
1b562c24 2/* $DragonFly: src/sys/netproto/key/key.c,v 1.21 2008/06/08 08:38:05 sephe Exp $ */
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3/* $KAME: key.c,v 1.191 2001/06/27 10:46:49 sakane Exp $ */
4
5/*
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34/*
35 * This code is referd to RFC 2367
36 */
37
38#include "opt_inet.h"
39#include "opt_inet6.h"
40#include "opt_ipsec.h"
41
42#include <sys/types.h>
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/kernel.h>
46#include <sys/mbuf.h>
47#include <sys/domain.h>
48#include <sys/protosw.h>
49#include <sys/malloc.h>
50#include <sys/socket.h>
51#include <sys/socketvar.h>
52#include <sys/sysctl.h>
53#include <sys/errno.h>
54#include <sys/proc.h>
55#include <sys/queue.h>
56#include <sys/syslog.h>
68b13d6b 57#include <sys/thread2.h>
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58
59#include <net/if.h>
60#include <net/route.h>
61#include <net/raw_cb.h>
62
63#include <netinet/in.h>
64#include <netinet/in_systm.h>
65#include <netinet/ip.h>
66#include <netinet/in_var.h>
67
68#ifdef INET6
69#include <netinet/ip6.h>
70#include <netinet6/in6_var.h>
71#include <netinet6/ip6_var.h>
72#endif /* INET6 */
73
74#ifdef INET
75#include <netinet/in_pcb.h>
76#endif
77#ifdef INET6
78#include <netinet6/in6_pcb.h>
79#endif /* INET6 */
80
81#include <net/pfkeyv2.h>
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82#include "keydb.h"
83#include "key.h"
84#include "keysock.h"
85#include "key_debug.h"
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86
87#include <netinet6/ipsec.h>
88#ifdef INET6
89#include <netinet6/ipsec6.h>
90#endif
91#include <netinet6/ah.h>
92#ifdef INET6
93#include <netinet6/ah6.h>
94#endif
95#ifdef IPSEC_ESP
96#include <netinet6/esp.h>
97#ifdef INET6
98#include <netinet6/esp6.h>
99#endif
100#endif
101#include <netinet6/ipcomp.h>
102#ifdef INET6
103#include <netinet6/ipcomp6.h>
104#endif
105
106#include <machine/stdarg.h>
107
108/* randomness */
109#include <sys/random.h>
110
111#include <net/net_osdep.h>
112
113#ifndef satosin
114#define satosin(s) ((struct sockaddr_in *)s)
115#endif
116
117#define FULLMASK 0xff
118
119/*
120 * Note on SA reference counting:
121 * - SAs that are not in DEAD state will have (total external reference + 1)
122 * following value in reference count field. they cannot be freed and are
123 * referenced from SA header.
124 * - SAs that are in DEAD state will have (total external reference)
125 * in reference count field. they are ready to be freed. reference from
126 * SA header will be removed in key_delsav(), when the reference count
127 * field hits 0 (= no external reference other than from SA header.
128 */
129
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130#ifndef IPSEC_DEBUG2
131static struct callout key_timehandler_ch;
132#endif
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133u_int32_t key_debug_level = 0;
134static u_int key_spi_trycnt = 1000;
135static u_int32_t key_spi_minval = 0x100;
136static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
137static u_int32_t policy_id = 0;
138static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
139static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
140static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
141static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
142static int key_preferred_oldsa = 1; /* preferred old sa rather than new sa.*/
143
144static u_int32_t acq_seq = 0;
145static int key_tick_init_random = 0;
146
147static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
148static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
149static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
150 /* registed list */
151#ifndef IPSEC_NONBLOCK_ACQUIRE
152static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
153#endif
154static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
155
156struct key_cb key_cb;
157
158/* search order for SAs */
159static const u_int saorder_state_valid_prefer_old[] = {
160 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
161};
162static const u_int saorder_state_valid_prefer_new[] = {
163 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
164};
165static const u_int saorder_state_alive[] = {
166 /* except DEAD */
167 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
168};
169static const u_int saorder_state_any[] = {
170 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
171 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
172};
173
174static const int minsize[] = {
175 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
176 sizeof(struct sadb_sa), /* SADB_EXT_SA */
177 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
178 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
179 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
180 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
181 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
182 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
183 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
184 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
185 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
186 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
187 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
188 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
189 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
190 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
191 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
192 0, /* SADB_X_EXT_KMPRIVATE */
193 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
194 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
195};
196static const int maxsize[] = {
197 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
198 sizeof(struct sadb_sa), /* SADB_EXT_SA */
199 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
200 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
201 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
202 0, /* SADB_EXT_ADDRESS_SRC */
203 0, /* SADB_EXT_ADDRESS_DST */
204 0, /* SADB_EXT_ADDRESS_PROXY */
205 0, /* SADB_EXT_KEY_AUTH */
206 0, /* SADB_EXT_KEY_ENCRYPT */
207 0, /* SADB_EXT_IDENTITY_SRC */
208 0, /* SADB_EXT_IDENTITY_DST */
209 0, /* SADB_EXT_SENSITIVITY */
210 0, /* SADB_EXT_PROPOSAL */
211 0, /* SADB_EXT_SUPPORTED_AUTH */
212 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
213 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
214 0, /* SADB_X_EXT_KMPRIVATE */
215 0, /* SADB_X_EXT_POLICY */
216 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
217};
218
219static int ipsec_esp_keymin = 256;
220static int ipsec_esp_auth = 0;
221static int ipsec_ah_keymin = 128;
222
223#ifdef SYSCTL_DECL
224SYSCTL_DECL(_net_key);
225#endif
226
227SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
228 &key_debug_level, 0, "");
229
230/* max count of trial for the decision of spi value */
231SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
232 &key_spi_trycnt, 0, "");
233
234/* minimum spi value to allocate automatically. */
235SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
236 &key_spi_minval, 0, "");
237
238/* maximun spi value to allocate automatically. */
239SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
240 &key_spi_maxval, 0, "");
241
242/* interval to initialize randseed */
243SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
244 &key_int_random, 0, "");
245
246/* lifetime for larval SA */
247SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
248 &key_larval_lifetime, 0, "");
249
250/* counter for blocking to send SADB_ACQUIRE to IKEd */
251SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
252 &key_blockacq_count, 0, "");
253
254/* lifetime for blocking to send SADB_ACQUIRE to IKEd */
255SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
256 &key_blockacq_lifetime, 0, "");
257
258/* ESP auth */
259SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
260 &ipsec_esp_auth, 0, "");
261
262/* minimum ESP key length */
263SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
264 &ipsec_esp_keymin, 0, "");
265
266/* minimum AH key length */
267SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
268 &ipsec_ah_keymin, 0, "");
269
270/* perfered old SA rather than new SA */
271SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
272 &key_preferred_oldsa, 0, "");
273
274#ifndef LIST_FOREACH
275#define LIST_FOREACH(elm, head, field) \
276 for (elm = LIST_FIRST(head); elm; elm = LIST_NEXT(elm, field))
277#endif
278#define __LIST_CHAINED(elm) \
279 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
280#define LIST_INSERT_TAIL(head, elm, type, field) \
281do {\
282 struct type *curelm = LIST_FIRST(head); \
283 if (curelm == NULL) {\
284 LIST_INSERT_HEAD(head, elm, field); \
285 } else { \
286 while (LIST_NEXT(curelm, field)) \
287 curelm = LIST_NEXT(curelm, field);\
288 LIST_INSERT_AFTER(curelm, elm, field);\
289 }\
290} while (0)
291
292#define KEY_CHKSASTATE(head, sav, name) \
293do { \
294 if ((head) != (sav)) { \
295 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
296 (name), (head), (sav))); \
297 continue; \
298 } \
299} while (0)
300
301#define KEY_CHKSPDIR(head, sp, name) \
302do { \
303 if ((head) != (sp)) { \
304 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
305 "anyway continue.\n", \
306 (name), (head), (sp))); \
307 } \
308} while (0)
309
310#if 1
311#define KMALLOC(p, t, n) \
efda3bd0 312 ((p) = (t) kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK))
984263bc 313#define KFREE(p) \
efda3bd0 314 kfree((caddr_t)(p), M_SECA);
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315#else
316#define KMALLOC(p, t, n) \
317do { \
efda3bd0 318 ((p) = (t)kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK)); \
a6ec04bc 319 kprintf("%s %d: %p <- KMALLOC(%s, %d)\n", \
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320 __FILE__, __LINE__, (p), #t, n); \
321} while (0)
322
323#define KFREE(p) \
324 do { \
a6ec04bc 325 kprintf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
efda3bd0 326 kfree((caddr_t)(p), M_SECA); \
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327 } while (0)
328#endif
329
330/*
331 * set parameters into secpolicyindex buffer.
332 * Must allocate secpolicyindex buffer passed to this function.
333 */
334#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
335do { \
336 bzero((idx), sizeof(struct secpolicyindex)); \
337 (idx)->dir = (_dir); \
338 (idx)->prefs = (ps); \
339 (idx)->prefd = (pd); \
340 (idx)->ul_proto = (ulp); \
341 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
342 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
343} while (0)
344
345/*
346 * set parameters into secasindex buffer.
347 * Must allocate secasindex buffer before calling this function.
348 */
349#define KEY_SETSECASIDX(p, m, r, s, d, idx) \
350do { \
351 bzero((idx), sizeof(struct secasindex)); \
352 (idx)->proto = (p); \
353 (idx)->mode = (m); \
354 (idx)->reqid = (r); \
355 bcopy((s), &(idx)->src, ((struct sockaddr *)(s))->sa_len); \
356 bcopy((d), &(idx)->dst, ((struct sockaddr *)(d))->sa_len); \
357} while (0)
358
359/* key statistics */
360struct _keystat {
361 u_long getspi_count; /* the avarage of count to try to get new SPI */
362} keystat;
363
364struct sadb_msghdr {
365 struct sadb_msg *msg;
366 struct sadb_ext *ext[SADB_EXT_MAX + 1];
367 int extoff[SADB_EXT_MAX + 1];
368 int extlen[SADB_EXT_MAX + 1];
369};
370
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371static struct secasvar *key_allocsa_policy (struct secasindex *);
372static void key_freesp_so (struct secpolicy **);
373static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
374static void key_delsp (struct secpolicy *);
375static struct secpolicy *key_getsp (struct secpolicyindex *);
376static struct secpolicy *key_getspbyid (u_int32_t);
377static u_int32_t key_newreqid (void);
378static struct mbuf *key_gather_mbuf (struct mbuf *,
379 const struct sadb_msghdr *, int, int, ...);
380static int key_spdadd (struct socket *, struct mbuf *,
381 const struct sadb_msghdr *);
382static u_int32_t key_getnewspid (void);
383static int key_spddelete (struct socket *, struct mbuf *,
384 const struct sadb_msghdr *);
385static int key_spddelete2 (struct socket *, struct mbuf *,
386 const struct sadb_msghdr *);
387static int key_spdget (struct socket *, struct mbuf *,
388 const struct sadb_msghdr *);
389static int key_spdflush (struct socket *, struct mbuf *,
390 const struct sadb_msghdr *);
391static int key_spddump (struct socket *, struct mbuf *,
392 const struct sadb_msghdr *);
393static struct mbuf *key_setdumpsp (struct secpolicy *,
394 u_int8_t, u_int32_t, u_int32_t);
395static u_int key_getspreqmsglen (struct secpolicy *);
396static int key_spdexpire (struct secpolicy *);
397static struct secashead *key_newsah (struct secasindex *);
398static void key_delsah (struct secashead *);
399static struct secasvar *key_newsav (struct mbuf *,
400 const struct sadb_msghdr *, struct secashead *, int *);
401static void key_delsav (struct secasvar *);
402static struct secashead *key_getsah (struct secasindex *);
403static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
404static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
405static int key_setsaval (struct secasvar *, struct mbuf *,
406 const struct sadb_msghdr *);
407static int key_mature (struct secasvar *);
408static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
409 u_int8_t, u_int32_t, u_int32_t);
410static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
411 u_int32_t, pid_t, u_int16_t);
412static struct mbuf *key_setsadbsa (struct secasvar *);
413static struct mbuf *key_setsadbaddr (u_int16_t,
414 struct sockaddr *, u_int8_t, u_int16_t);
984263bc 415#if 0
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416static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, caddr_t,
417 int, u_int64_t);
984263bc 418#endif
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419static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int32_t);
420static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
421 u_int32_t);
422static void *key_newbuf (const void *, u_int);
984263bc 423#ifdef INET6
3e0c9cba 424static int key_ismyaddr6 (struct sockaddr_in6 *);
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425#endif
426
427/* flags for key_cmpsaidx() */
428#define CMP_HEAD 1 /* protocol, addresses. */
429#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
430#define CMP_REQID 3 /* additionally HEAD, reaid. */
431#define CMP_EXACTLY 4 /* all elements. */
432static int key_cmpsaidx
3e0c9cba 433 (struct secasindex *, struct secasindex *, int);
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434
435static int key_cmpspidx_exactly
3e0c9cba 436 (struct secpolicyindex *, struct secpolicyindex *);
984263bc 437static int key_cmpspidx_withmask
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438 (struct secpolicyindex *, struct secpolicyindex *);
439static int key_sockaddrcmp (struct sockaddr *, struct sockaddr *, int);
440static int key_bbcmp (caddr_t, caddr_t, u_int);
441static void key_srandom (void);
442static u_int16_t key_satype2proto (u_int8_t);
443static u_int8_t key_proto2satype (u_int16_t);
444
445static int key_getspi (struct socket *, struct mbuf *,
446 const struct sadb_msghdr *);
447static u_int32_t key_do_getnewspi (struct sadb_spirange *,
448 struct secasindex *);
449static int key_update (struct socket *, struct mbuf *,
450 const struct sadb_msghdr *);
984263bc 451#ifdef IPSEC_DOSEQCHECK
3e0c9cba 452static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
984263bc 453#endif
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454static int key_add (struct socket *, struct mbuf *,
455 const struct sadb_msghdr *);
456static int key_setident (struct secashead *, struct mbuf *,
457 const struct sadb_msghdr *);
458static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
459 const struct sadb_msghdr *);
460static int key_delete (struct socket *, struct mbuf *,
461 const struct sadb_msghdr *);
462static int key_get (struct socket *, struct mbuf *,
463 const struct sadb_msghdr *);
464
465static void key_getcomb_setlifetime (struct sadb_comb *);
984263bc 466#ifdef IPSEC_ESP
3e0c9cba 467static struct mbuf *key_getcomb_esp (void);
984263bc 468#endif
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469static struct mbuf *key_getcomb_ah (void);
470static struct mbuf *key_getcomb_ipcomp (void);
471static struct mbuf *key_getprop (const struct secasindex *);
984263bc 472
3e0c9cba 473static int key_acquire (struct secasindex *, struct secpolicy *);
984263bc 474#ifndef IPSEC_NONBLOCK_ACQUIRE
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475static struct secacq *key_newacq (struct secasindex *);
476static struct secacq *key_getacq (struct secasindex *);
477static struct secacq *key_getacqbyseq (u_int32_t);
984263bc 478#endif
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479static struct secspacq *key_newspacq (struct secpolicyindex *);
480static struct secspacq *key_getspacq (struct secpolicyindex *);
481static int key_acquire2 (struct socket *, struct mbuf *,
482 const struct sadb_msghdr *);
483static int key_register (struct socket *, struct mbuf *,
484 const struct sadb_msghdr *);
485static int key_expire (struct secasvar *);
486static int key_flush (struct socket *, struct mbuf *,
487 const struct sadb_msghdr *);
488static int key_dump (struct socket *, struct mbuf *,
489 const struct sadb_msghdr *);
490static int key_promisc (struct socket *, struct mbuf *,
491 const struct sadb_msghdr *);
492static int key_senderror (struct socket *, struct mbuf *, int);
493static int key_validate_ext (const struct sadb_ext *, int);
494static int key_align (struct mbuf *, struct sadb_msghdr *);
984263bc 495#if 0
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496static const char *key_getfqdn (void);
497static const char *key_getuserfqdn (void);
984263bc 498#endif
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499static void key_sa_chgstate (struct secasvar *, u_int8_t);
500static struct mbuf *key_alloc_mbuf (int);
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501
502/* %%% IPsec policy management */
503/*
504 * allocating a SP for OUTBOUND or INBOUND packet.
505 * Must call key_freesp() later.
506 * OUT: NULL: not found
507 * others: found and return the pointer.
508 */
509struct secpolicy *
9855a82b 510key_allocsp(struct secpolicyindex *spidx, u_int dir)
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511{
512 struct secpolicy *sp;
513 struct timeval tv;
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514
515 /* sanity check */
516 if (spidx == NULL)
517 panic("key_allocsp: NULL pointer is passed.\n");
518
519 /* check direction */
520 switch (dir) {
521 case IPSEC_DIR_INBOUND:
522 case IPSEC_DIR_OUTBOUND:
523 break;
524 default:
525 panic("key_allocsp: Invalid direction is passed.\n");
526 }
527
528 /* get a SP entry */
68b13d6b 529 crit_enter();
984263bc 530 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
a6ec04bc 531 kprintf("*** objects\n");
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532 kdebug_secpolicyindex(spidx));
533
534 LIST_FOREACH(sp, &sptree[dir], chain) {
535 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
a6ec04bc 536 kprintf("*** in SPD\n");
984263bc
MD
537 kdebug_secpolicyindex(&sp->spidx));
538
539 if (sp->state == IPSEC_SPSTATE_DEAD)
540 continue;
541 if (key_cmpspidx_withmask(&sp->spidx, spidx))
542 goto found;
543 }
544
68b13d6b 545 crit_exit();
984263bc
MD
546 return NULL;
547
548found:
549 /* sanity check */
550 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
551
552 /* found a SPD entry */
553 microtime(&tv);
554 sp->lastused = tv.tv_sec;
555 sp->refcnt++;
68b13d6b 556 crit_exit();
984263bc 557 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 558 kprintf("DP key_allocsp cause refcnt++:%d SP:%p\n",
984263bc
MD
559 sp->refcnt, sp));
560
561 return sp;
562}
563
564/*
565 * return a policy that matches this particular inbound packet.
566 * XXX slow
567 */
568struct secpolicy *
9855a82b
SW
569key_gettunnel(struct sockaddr *osrc, struct sockaddr *odst,
570 struct sockaddr *isrc, struct sockaddr *idst)
984263bc
MD
571{
572 struct secpolicy *sp;
573 const int dir = IPSEC_DIR_INBOUND;
574 struct timeval tv;
984263bc
MD
575 struct ipsecrequest *r1, *r2, *p;
576 struct sockaddr *os, *od, *is, *id;
577 struct secpolicyindex spidx;
578
579 if (isrc->sa_family != idst->sa_family) {
580 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
581 isrc->sa_family, idst->sa_family));
582 return NULL;
583 }
584
68b13d6b 585 crit_enter();
984263bc
MD
586 LIST_FOREACH(sp, &sptree[dir], chain) {
587 if (sp->state == IPSEC_SPSTATE_DEAD)
588 continue;
589
590 r1 = r2 = NULL;
591 for (p = sp->req; p; p = p->next) {
592 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
593 continue;
594
595 r1 = r2;
596 r2 = p;
597
598 if (!r1) {
599 /* here we look at address matches only */
600 spidx = sp->spidx;
601 if (isrc->sa_len > sizeof(spidx.src) ||
602 idst->sa_len > sizeof(spidx.dst))
603 continue;
604 bcopy(isrc, &spidx.src, isrc->sa_len);
605 bcopy(idst, &spidx.dst, idst->sa_len);
606 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
607 continue;
608 } else {
609 is = (struct sockaddr *)&r1->saidx.src;
610 id = (struct sockaddr *)&r1->saidx.dst;
611 if (key_sockaddrcmp(is, isrc, 0) ||
612 key_sockaddrcmp(id, idst, 0))
613 continue;
614 }
615
616 os = (struct sockaddr *)&r2->saidx.src;
617 od = (struct sockaddr *)&r2->saidx.dst;
618 if (key_sockaddrcmp(os, osrc, 0) ||
619 key_sockaddrcmp(od, odst, 0))
620 continue;
621
622 goto found;
623 }
624 }
68b13d6b 625 crit_exit();
984263bc
MD
626 return NULL;
627
628found:
629 microtime(&tv);
630 sp->lastused = tv.tv_sec;
631 sp->refcnt++;
68b13d6b 632 crit_exit();
984263bc
MD
633 return sp;
634}
635
636/*
637 * allocating an SA entry for an *OUTBOUND* packet.
638 * checking each request entries in SP, and acquire an SA if need.
639 * OUT: 0: there are valid requests.
640 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
641 */
642int
9855a82b 643key_checkrequest(struct ipsecrequest *isr, struct secasindex *saidx)
984263bc
MD
644{
645 u_int level;
646 int error;
647
648 /* sanity check */
649 if (isr == NULL || saidx == NULL)
650 panic("key_checkrequest: NULL pointer is passed.\n");
651
652 /* check mode */
653 switch (saidx->mode) {
654 case IPSEC_MODE_TRANSPORT:
655 case IPSEC_MODE_TUNNEL:
656 break;
657 case IPSEC_MODE_ANY:
658 default:
659 panic("key_checkrequest: Invalid policy defined.\n");
660 }
661
662 /* get current level */
663 level = ipsec_get_reqlevel(isr);
664
665#if 0
666 /*
667 * We do allocate new SA only if the state of SA in the holder is
668 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
669 */
670 if (isr->sav != NULL) {
671 if (isr->sav->sah == NULL)
672 panic("key_checkrequest: sah is null.\n");
673 if (isr->sav == (struct secasvar *)LIST_FIRST(
674 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
675 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 676 kprintf("DP checkrequest calls free SA:%p\n",
984263bc
MD
677 isr->sav));
678 key_freesav(isr->sav);
679 isr->sav = NULL;
680 }
681 }
682#else
683 /*
684 * we free any SA stashed in the IPsec request because a different
685 * SA may be involved each time this request is checked, either
686 * because new SAs are being configured, or this request is
687 * associated with an unconnected datagram socket, or this request
688 * is associated with a system default policy.
689 *
690 * The operation may have negative impact to performance. We may
691 * want to check cached SA carefully, rather than picking new SA
692 * every time.
693 */
694 if (isr->sav != NULL) {
695 key_freesav(isr->sav);
696 isr->sav = NULL;
697 }
698#endif
699
700 /*
701 * new SA allocation if no SA found.
702 * key_allocsa_policy should allocate the oldest SA available.
703 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
704 */
705 if (isr->sav == NULL)
706 isr->sav = key_allocsa_policy(saidx);
707
708 /* When there is SA. */
709 if (isr->sav != NULL)
710 return 0;
711
712 /* there is no SA */
713 if ((error = key_acquire(saidx, isr->sp)) != 0) {
714 /* XXX What should I do ? */
715 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
716 "from key_acquire.\n", error));
717 return error;
718 }
719
720 return level == IPSEC_LEVEL_REQUIRE ? ENOENT : 0;
721}
722
723/*
724 * allocating a SA for policy entry from SAD.
725 * NOTE: searching SAD of aliving state.
726 * OUT: NULL: not found.
727 * others: found and return the pointer.
728 */
729static struct secasvar *
9855a82b 730key_allocsa_policy(struct secasindex *saidx)
984263bc
MD
731{
732 struct secashead *sah;
733 struct secasvar *sav;
734 u_int stateidx, state;
735 const u_int *saorder_state_valid;
736 int arraysize;
737
738 LIST_FOREACH(sah, &sahtree, chain) {
739 if (sah->state == SADB_SASTATE_DEAD)
740 continue;
741 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
742 goto found;
743 }
744
745 return NULL;
746
747 found:
748
749 /*
750 * search a valid state list for outbound packet.
751 * This search order is important.
752 */
753 if (key_preferred_oldsa) {
754 saorder_state_valid = saorder_state_valid_prefer_old;
755 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
756 } else {
757 saorder_state_valid = saorder_state_valid_prefer_new;
758 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
759 }
760
761 for (stateidx = 0; stateidx < arraysize; stateidx++) {
762
763 state = saorder_state_valid[stateidx];
764
765 sav = key_do_allocsa_policy(sah, state);
766 if (sav != NULL)
767 return sav;
768 }
769
770 return NULL;
771}
772
773/*
774 * searching SAD with direction, protocol, mode and state.
775 * called by key_allocsa_policy().
776 * OUT:
777 * NULL : not found
778 * others : found, pointer to a SA.
779 */
780static struct secasvar *
9855a82b 781key_do_allocsa_policy(struct secashead *sah, u_int state)
984263bc
MD
782{
783 struct secasvar *sav, *nextsav, *candidate, *d;
784
785 /* initilize */
786 candidate = NULL;
787
788 for (sav = LIST_FIRST(&sah->savtree[state]);
789 sav != NULL;
790 sav = nextsav) {
791
792 nextsav = LIST_NEXT(sav, chain);
793
794 /* sanity check */
795 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
796
797 /* initialize */
798 if (candidate == NULL) {
799 candidate = sav;
800 continue;
801 }
802
803 /* Which SA is the better ? */
804
805 /* sanity check 2 */
806 if (candidate->lft_c == NULL || sav->lft_c == NULL)
807 panic("key_do_allocsa_policy: "
808 "lifetime_current is NULL.\n");
809
810 /* What the best method is to compare ? */
811 if (key_preferred_oldsa) {
812 if (candidate->lft_c->sadb_lifetime_addtime >
813 sav->lft_c->sadb_lifetime_addtime) {
814 candidate = sav;
815 }
816 continue;
817 /*NOTREACHED*/
818 }
819
820 /* prefered new sa rather than old sa */
821 if (candidate->lft_c->sadb_lifetime_addtime <
822 sav->lft_c->sadb_lifetime_addtime) {
823 d = candidate;
824 candidate = sav;
825 } else
826 d = sav;
827
828 /*
829 * prepared to delete the SA when there is more
830 * suitable candidate and the lifetime of the SA is not
831 * permanent.
832 */
833 if (d->lft_c->sadb_lifetime_addtime != 0) {
834 struct mbuf *m, *result;
835
836 key_sa_chgstate(d, SADB_SASTATE_DEAD);
837
838 m = key_setsadbmsg(SADB_DELETE, 0,
839 d->sah->saidx.proto, 0, 0, d->refcnt - 1);
840 if (!m)
841 goto msgfail;
842 result = m;
843
844 /* set sadb_address for saidx's. */
845 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
846 (struct sockaddr *)&d->sah->saidx.src,
847 d->sah->saidx.src.ss_len << 3,
848 IPSEC_ULPROTO_ANY);
849 if (!m)
850 goto msgfail;
851 m_cat(result, m);
852
853 /* set sadb_address for saidx's. */
854 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
855 (struct sockaddr *)&d->sah->saidx.src,
856 d->sah->saidx.src.ss_len << 3,
857 IPSEC_ULPROTO_ANY);
858 if (!m)
859 goto msgfail;
860 m_cat(result, m);
861
862 /* create SA extension */
863 m = key_setsadbsa(d);
864 if (!m)
865 goto msgfail;
866 m_cat(result, m);
867
868 if (result->m_len < sizeof(struct sadb_msg)) {
869 result = m_pullup(result,
870 sizeof(struct sadb_msg));
871 if (result == NULL)
872 goto msgfail;
873 }
874
875 result->m_pkthdr.len = 0;
876 for (m = result; m; m = m->m_next)
877 result->m_pkthdr.len += m->m_len;
878 mtod(result, struct sadb_msg *)->sadb_msg_len =
879 PFKEY_UNIT64(result->m_pkthdr.len);
880
881 if (key_sendup_mbuf(NULL, result,
882 KEY_SENDUP_REGISTERED))
883 goto msgfail;
884 msgfail:
885 key_freesav(d);
886 }
887 }
888
889 if (candidate) {
890 candidate->refcnt++;
891 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 892 kprintf("DP allocsa_policy cause "
984263bc
MD
893 "refcnt++:%d SA:%p\n",
894 candidate->refcnt, candidate));
895 }
896 return candidate;
897}
898
899/*
900 * allocating a SA entry for a *INBOUND* packet.
901 * Must call key_freesav() later.
902 * OUT: positive: pointer to a sav.
903 * NULL: not found, or error occured.
904 *
905 * In the comparison, source address will be ignored for RFC2401 conformance.
906 * To quote, from section 4.1:
907 * A security association is uniquely identified by a triple consisting
908 * of a Security Parameter Index (SPI), an IP Destination Address, and a
909 * security protocol (AH or ESP) identifier.
910 * Note that, however, we do need to keep source address in IPsec SA.
911 * IKE specification and PF_KEY specification do assume that we
912 * keep source address in IPsec SA. We see a tricky situation here.
913 */
914struct secasvar *
9855a82b
SW
915key_allocsa(u_int family, caddr_t src, caddr_t dst, u_int proto,
916 u_int32_t spi)
984263bc
MD
917{
918 struct secashead *sah;
919 struct secasvar *sav;
920 u_int stateidx, state;
921 struct sockaddr_in sin;
922 struct sockaddr_in6 sin6;
984263bc
MD
923 const u_int *saorder_state_valid;
924 int arraysize;
925
926 /* sanity check */
927 if (src == NULL || dst == NULL)
928 panic("key_allocsa: NULL pointer is passed.\n");
929
930 /*
931 * when both systems employ similar strategy to use a SA.
932 * the search order is important even in the inbound case.
933 */
934 if (key_preferred_oldsa) {
935 saorder_state_valid = saorder_state_valid_prefer_old;
936 arraysize = _ARRAYLEN(saorder_state_valid_prefer_old);
937 } else {
938 saorder_state_valid = saorder_state_valid_prefer_new;
939 arraysize = _ARRAYLEN(saorder_state_valid_prefer_new);
940 }
941
942 /*
943 * searching SAD.
944 * XXX: to be checked internal IP header somewhere. Also when
945 * IPsec tunnel packet is received. But ESP tunnel mode is
946 * encrypted so we can't check internal IP header.
947 */
68b13d6b 948 crit_enter();
984263bc
MD
949 LIST_FOREACH(sah, &sahtree, chain) {
950 /*
951 * search a valid state list for inbound packet.
952 * the search order is not important.
953 */
954 for (stateidx = 0; stateidx < arraysize; stateidx++) {
955 state = saorder_state_valid[stateidx];
956 LIST_FOREACH(sav, &sah->savtree[state], chain) {
957 /* sanity check */
958 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
959 if (proto != sav->sah->saidx.proto)
960 continue;
961 if (spi != sav->spi)
962 continue;
963 if (family != sav->sah->saidx.src.ss_family ||
964 family != sav->sah->saidx.dst.ss_family)
965 continue;
966
967#if 0 /* don't check src */
968 /* check src address */
969 switch (family) {
970 case AF_INET:
971 bzero(&sin, sizeof(sin));
972 sin.sin_family = AF_INET;
973 sin.sin_len = sizeof(sin);
974 bcopy(src, &sin.sin_addr,
975 sizeof(sin.sin_addr));
976 if (key_sockaddrcmp((struct sockaddr*)&sin,
977 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
978 continue;
979
980 break;
981 case AF_INET6:
982 bzero(&sin6, sizeof(sin6));
983 sin6.sin6_family = AF_INET6;
984 sin6.sin6_len = sizeof(sin6);
985 bcopy(src, &sin6.sin6_addr,
986 sizeof(sin6.sin6_addr));
987 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
988 /* kame fake scopeid */
989 sin6.sin6_scope_id =
990 ntohs(sin6.sin6_addr.s6_addr16[1]);
991 sin6.sin6_addr.s6_addr16[1] = 0;
992 }
993 if (key_sockaddrcmp((struct sockaddr*)&sin6,
994 (struct sockaddr *)&sav->sah->saidx.src, 0) != 0)
995 continue;
996 break;
997 default:
998 ipseclog((LOG_DEBUG, "key_allocsa: "
999 "unknown address family=%d.\n",
1000 family));
1001 continue;
1002 }
1003
1004#endif
1005 /* check dst address */
1006 switch (family) {
1007 case AF_INET:
1008 bzero(&sin, sizeof(sin));
1009 sin.sin_family = AF_INET;
1010 sin.sin_len = sizeof(sin);
1011 bcopy(dst, &sin.sin_addr,
1012 sizeof(sin.sin_addr));
1013 if (key_sockaddrcmp((struct sockaddr*)&sin,
1014 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1015 continue;
1016
1017 break;
1018 case AF_INET6:
1019 bzero(&sin6, sizeof(sin6));
1020 sin6.sin6_family = AF_INET6;
1021 sin6.sin6_len = sizeof(sin6);
1022 bcopy(dst, &sin6.sin6_addr,
1023 sizeof(sin6.sin6_addr));
1024 if (IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)) {
1025 /* kame fake scopeid */
1026 sin6.sin6_scope_id =
1027 ntohs(sin6.sin6_addr.s6_addr16[1]);
1028 sin6.sin6_addr.s6_addr16[1] = 0;
1029 }
1030 if (key_sockaddrcmp((struct sockaddr*)&sin6,
1031 (struct sockaddr *)&sav->sah->saidx.dst, 0) != 0)
1032 continue;
1033 break;
1034 default:
1035 ipseclog((LOG_DEBUG, "key_allocsa: "
1036 "unknown address family=%d.\n",
1037 family));
1038 continue;
1039 }
1040
1041 goto found;
1042 }
1043 }
1044 }
1045
1046 /* not found */
68b13d6b 1047 crit_exit();
984263bc
MD
1048 return NULL;
1049
1050found:
1051 sav->refcnt++;
68b13d6b 1052 crit_exit();
984263bc 1053 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1054 kprintf("DP allocsa cause refcnt++:%d SA:%p\n",
984263bc
MD
1055 sav->refcnt, sav));
1056 return sav;
1057}
1058
1059/*
1060 * Must be called after calling key_allocsp().
1061 * For both the packet without socket and key_freeso().
1062 */
1063void
9855a82b 1064key_freesp(struct secpolicy *sp)
984263bc
MD
1065{
1066 /* sanity check */
1067 if (sp == NULL)
1068 panic("key_freesp: NULL pointer is passed.\n");
1069
1070 sp->refcnt--;
1071 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1072 kprintf("DP freesp cause refcnt--:%d SP:%p\n",
984263bc
MD
1073 sp->refcnt, sp));
1074
1075 if (sp->refcnt == 0)
1076 key_delsp(sp);
1077
1078 return;
1079}
1080
1081/*
1082 * Must be called after calling key_allocsp().
1083 * For the packet with socket.
1084 */
1085void
9855a82b 1086key_freeso(struct socket *so)
984263bc
MD
1087{
1088 /* sanity check */
1089 if (so == NULL)
1090 panic("key_freeso: NULL pointer is passed.\n");
1091
1092 switch (so->so_proto->pr_domain->dom_family) {
1093#ifdef INET
1094 case PF_INET:
1095 {
ed894f8c 1096 struct inpcb *pcb = so->so_pcb;
984263bc
MD
1097
1098 /* Does it have a PCB ? */
1099 if (pcb == NULL)
1100 return;
1101 key_freesp_so(&pcb->inp_sp->sp_in);
1102 key_freesp_so(&pcb->inp_sp->sp_out);
1103 }
1104 break;
1105#endif
1106#ifdef INET6
1107 case PF_INET6:
1108 {
1109#ifdef HAVE_NRL_INPCB
ed894f8c 1110 struct inpcb *pcb = so->so_pcb;
984263bc
MD
1111
1112 /* Does it have a PCB ? */
1113 if (pcb == NULL)
1114 return;
1115 key_freesp_so(&pcb->inp_sp->sp_in);
1116 key_freesp_so(&pcb->inp_sp->sp_out);
1117#else
ed894f8c 1118 struct in6pcb *pcb = so->so_pcb;
984263bc
MD
1119
1120 /* Does it have a PCB ? */
1121 if (pcb == NULL)
1122 return;
1123 key_freesp_so(&pcb->in6p_sp->sp_in);
1124 key_freesp_so(&pcb->in6p_sp->sp_out);
1125#endif
1126 }
1127 break;
1128#endif /* INET6 */
1129 default:
1130 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1131 so->so_proto->pr_domain->dom_family));
1132 return;
1133 }
1134
1135 return;
1136}
1137
1138static void
9855a82b 1139key_freesp_so(struct secpolicy **sp)
984263bc
MD
1140{
1141 /* sanity check */
1142 if (sp == NULL || *sp == NULL)
1143 panic("key_freesp_so: sp == NULL\n");
1144
1145 switch ((*sp)->policy) {
1146 case IPSEC_POLICY_IPSEC:
1147 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1148 kprintf("DP freeso calls free SP:%p\n", *sp));
984263bc
MD
1149 key_freesp(*sp);
1150 *sp = NULL;
1151 break;
1152 case IPSEC_POLICY_ENTRUST:
1153 case IPSEC_POLICY_BYPASS:
1154 return;
1155 default:
1156 panic("key_freesp_so: Invalid policy found %d", (*sp)->policy);
1157 }
1158
1159 return;
1160}
1161
1162/*
1163 * Must be called after calling key_allocsa().
1164 * This function is called by key_freesp() to free some SA allocated
1165 * for a policy.
1166 */
1167void
9855a82b 1168key_freesav(struct secasvar *sav)
984263bc
MD
1169{
1170 /* sanity check */
1171 if (sav == NULL)
1172 panic("key_freesav: NULL pointer is passed.\n");
1173
1174 sav->refcnt--;
1175 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1176 kprintf("DP freesav cause refcnt--:%d SA:%p SPI %u\n",
984263bc
MD
1177 sav->refcnt, sav, (u_int32_t)ntohl(sav->spi)));
1178
1179 if (sav->refcnt == 0)
1180 key_delsav(sav);
1181
1182 return;
1183}
1184
1185/* %%% SPD management */
1186/*
1187 * free security policy entry.
1188 */
1189static void
9855a82b 1190key_delsp(struct secpolicy *sp)
984263bc 1191{
984263bc
MD
1192 /* sanity check */
1193 if (sp == NULL)
1194 panic("key_delsp: NULL pointer is passed.\n");
1195
1196 sp->state = IPSEC_SPSTATE_DEAD;
1197
1198 if (sp->refcnt > 0)
1199 return; /* can't free */
1200
68b13d6b 1201 crit_enter();
984263bc
MD
1202 /* remove from SP index */
1203 if (__LIST_CHAINED(sp))
1204 LIST_REMOVE(sp, chain);
1205
1206 {
1207 struct ipsecrequest *isr = sp->req, *nextisr;
1208
1209 while (isr != NULL) {
1210 if (isr->sav != NULL) {
1211 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1212 kprintf("DP delsp calls free SA:%p\n",
984263bc
MD
1213 isr->sav));
1214 key_freesav(isr->sav);
1215 isr->sav = NULL;
1216 }
1217
1218 nextisr = isr->next;
1219 KFREE(isr);
1220 isr = nextisr;
1221 }
1222 }
1223
1224 keydb_delsecpolicy(sp);
1225
68b13d6b 1226 crit_exit();
984263bc
MD
1227
1228 return;
1229}
1230
1231/*
1232 * search SPD
1233 * OUT: NULL : not found
1234 * others : found, pointer to a SP.
1235 */
1236static struct secpolicy *
9855a82b 1237key_getsp(struct secpolicyindex *spidx)
984263bc
MD
1238{
1239 struct secpolicy *sp;
1240
1241 /* sanity check */
1242 if (spidx == NULL)
1243 panic("key_getsp: NULL pointer is passed.\n");
1244
1245 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1246 if (sp->state == IPSEC_SPSTATE_DEAD)
1247 continue;
1248 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1249 sp->refcnt++;
1250 return sp;
1251 }
1252 }
1253
1254 return NULL;
1255}
1256
1257/*
1258 * get SP by index.
1259 * OUT: NULL : not found
1260 * others : found, pointer to a SP.
1261 */
1262static struct secpolicy *
9855a82b 1263key_getspbyid(u_int32_t id)
984263bc
MD
1264{
1265 struct secpolicy *sp;
1266
1267 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1268 if (sp->state == IPSEC_SPSTATE_DEAD)
1269 continue;
1270 if (sp->id == id) {
1271 sp->refcnt++;
1272 return sp;
1273 }
1274 }
1275
1276 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1277 if (sp->state == IPSEC_SPSTATE_DEAD)
1278 continue;
1279 if (sp->id == id) {
1280 sp->refcnt++;
1281 return sp;
1282 }
1283 }
1284
1285 return NULL;
1286}
1287
1288struct secpolicy *
9855a82b 1289key_newsp(void)
984263bc
MD
1290{
1291 struct secpolicy *newsp = NULL;
1292
1293 newsp = keydb_newsecpolicy();
1294 if (!newsp)
1295 return newsp;
1296
1297 newsp->refcnt = 1;
1298 newsp->req = NULL;
1299
1300 return newsp;
1301}
1302
1303/*
1304 * create secpolicy structure from sadb_x_policy structure.
1305 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1306 * so must be set properly later.
1307 */
1308struct secpolicy *
9855a82b 1309key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
984263bc
MD
1310{
1311 struct secpolicy *newsp;
1312
1313 /* sanity check */
1314 if (xpl0 == NULL)
1315 panic("key_msg2sp: NULL pointer was passed.\n");
1316 if (len < sizeof(*xpl0))
1317 panic("key_msg2sp: invalid length.\n");
1318 if (len != PFKEY_EXTLEN(xpl0)) {
1319 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1320 *error = EINVAL;
1321 return NULL;
1322 }
1323
1324 if ((newsp = key_newsp()) == NULL) {
1325 *error = ENOBUFS;
1326 return NULL;
1327 }
1328
1329 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1330 newsp->policy = xpl0->sadb_x_policy_type;
1331
1332 /* check policy */
1333 switch (xpl0->sadb_x_policy_type) {
1334 case IPSEC_POLICY_DISCARD:
1335 case IPSEC_POLICY_NONE:
1336 case IPSEC_POLICY_ENTRUST:
1337 case IPSEC_POLICY_BYPASS:
1338 newsp->req = NULL;
1339 break;
1340
1341 case IPSEC_POLICY_IPSEC:
1342 {
1343 int tlen;
1344 struct sadb_x_ipsecrequest *xisr;
1345 struct ipsecrequest **p_isr = &newsp->req;
1346
1347 /* validity check */
1348 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1349 ipseclog((LOG_DEBUG,
1350 "key_msg2sp: Invalid msg length.\n"));
1351 key_freesp(newsp);
1352 *error = EINVAL;
1353 return NULL;
1354 }
1355
1356 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1357 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1358
1359 while (tlen > 0) {
1360
1361 /* length check */
1362 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1363 ipseclog((LOG_DEBUG, "key_msg2sp: "
1364 "invalid ipsecrequest length.\n"));
1365 key_freesp(newsp);
1366 *error = EINVAL;
1367 return NULL;
1368 }
1369
1370 /* allocate request buffer */
1371 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1372 if ((*p_isr) == NULL) {
1373 ipseclog((LOG_DEBUG,
1374 "key_msg2sp: No more memory.\n"));
1375 key_freesp(newsp);
1376 *error = ENOBUFS;
1377 return NULL;
1378 }
1379 bzero(*p_isr, sizeof(**p_isr));
1380
1381 /* set values */
1382 (*p_isr)->next = NULL;
1383
1384 switch (xisr->sadb_x_ipsecrequest_proto) {
1385 case IPPROTO_ESP:
1386 case IPPROTO_AH:
1387 case IPPROTO_IPCOMP:
1388 break;
1389 default:
1390 ipseclog((LOG_DEBUG,
1391 "key_msg2sp: invalid proto type=%u\n",
1392 xisr->sadb_x_ipsecrequest_proto));
1393 key_freesp(newsp);
1394 *error = EPROTONOSUPPORT;
1395 return NULL;
1396 }
1397 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1398
1399 switch (xisr->sadb_x_ipsecrequest_mode) {
1400 case IPSEC_MODE_TRANSPORT:
1401 case IPSEC_MODE_TUNNEL:
1402 break;
1403 case IPSEC_MODE_ANY:
1404 default:
1405 ipseclog((LOG_DEBUG,
1406 "key_msg2sp: invalid mode=%u\n",
1407 xisr->sadb_x_ipsecrequest_mode));
1408 key_freesp(newsp);
1409 *error = EINVAL;
1410 return NULL;
1411 }
1412 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1413
1414 switch (xisr->sadb_x_ipsecrequest_level) {
1415 case IPSEC_LEVEL_DEFAULT:
1416 case IPSEC_LEVEL_USE:
1417 case IPSEC_LEVEL_REQUIRE:
1418 break;
1419 case IPSEC_LEVEL_UNIQUE:
1420 /* validity check */
1421 /*
1422 * If range violation of reqid, kernel will
1423 * update it, don't refuse it.
1424 */
1425 if (xisr->sadb_x_ipsecrequest_reqid
1426 > IPSEC_MANUAL_REQID_MAX) {
1427 ipseclog((LOG_DEBUG,
1428 "key_msg2sp: reqid=%d range "
1429 "violation, updated by kernel.\n",
1430 xisr->sadb_x_ipsecrequest_reqid));
1431 xisr->sadb_x_ipsecrequest_reqid = 0;
1432 }
1433
1434 /* allocate new reqid id if reqid is zero. */
1435 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1436 u_int32_t reqid;
1437 if ((reqid = key_newreqid()) == 0) {
1438 key_freesp(newsp);
1439 *error = ENOBUFS;
1440 return NULL;
1441 }
1442 (*p_isr)->saidx.reqid = reqid;
1443 xisr->sadb_x_ipsecrequest_reqid = reqid;
1444 } else {
1445 /* set it for manual keying. */
1446 (*p_isr)->saidx.reqid =
1447 xisr->sadb_x_ipsecrequest_reqid;
1448 }
1449 break;
1450
1451 default:
1452 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1453 xisr->sadb_x_ipsecrequest_level));
1454 key_freesp(newsp);
1455 *error = EINVAL;
1456 return NULL;
1457 }
1458 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1459
1460 /* set IP addresses if there */
1461 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1462 struct sockaddr *paddr;
1463
1464 paddr = (struct sockaddr *)(xisr + 1);
1465
1466 /* validity check */
1467 if (paddr->sa_len
1468 > sizeof((*p_isr)->saidx.src)) {
1469 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1470 "address length.\n"));
1471 key_freesp(newsp);
1472 *error = EINVAL;
1473 return NULL;
1474 }
1475 bcopy(paddr, &(*p_isr)->saidx.src,
1476 paddr->sa_len);
1477
1478 paddr = (struct sockaddr *)((caddr_t)paddr
1479 + paddr->sa_len);
1480
1481 /* validity check */
1482 if (paddr->sa_len
1483 > sizeof((*p_isr)->saidx.dst)) {
1484 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1485 "address length.\n"));
1486 key_freesp(newsp);
1487 *error = EINVAL;
1488 return NULL;
1489 }
1490 bcopy(paddr, &(*p_isr)->saidx.dst,
1491 paddr->sa_len);
1492 }
1493
1494 (*p_isr)->sav = NULL;
1495 (*p_isr)->sp = newsp;
1496
1497 /* initialization for the next. */
1498 p_isr = &(*p_isr)->next;
1499 tlen -= xisr->sadb_x_ipsecrequest_len;
1500
1501 /* validity check */
1502 if (tlen < 0) {
1503 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1504 key_freesp(newsp);
1505 *error = EINVAL;
1506 return NULL;
1507 }
1508
1509 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1510 + xisr->sadb_x_ipsecrequest_len);
1511 }
1512 }
1513 break;
1514 default:
1515 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1516 key_freesp(newsp);
1517 *error = EINVAL;
1518 return NULL;
1519 }
1520
1521 *error = 0;
1522 return newsp;
1523}
1524
1525static u_int32_t
9855a82b 1526key_newreqid(void)
984263bc
MD
1527{
1528 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1529
1530 auto_reqid = (auto_reqid == ~0
1531 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1532
1533 /* XXX should be unique check */
1534
1535 return auto_reqid;
1536}
1537
1538/*
1539 * copy secpolicy struct to sadb_x_policy structure indicated.
1540 */
1541struct mbuf *
9855a82b 1542key_sp2msg(struct secpolicy *sp)
984263bc
MD
1543{
1544 struct sadb_x_policy *xpl;
1545 int tlen;
1546 caddr_t p;
1547 struct mbuf *m;
1548
1549 /* sanity check. */
1550 if (sp == NULL)
1551 panic("key_sp2msg: NULL pointer was passed.\n");
1552
1553 tlen = key_getspreqmsglen(sp);
1554
1555 m = key_alloc_mbuf(tlen);
1556 if (!m || m->m_next) { /*XXX*/
1557 if (m)
1558 m_freem(m);
1559 return NULL;
1560 }
1561
1562 m->m_len = tlen;
1563 m->m_next = NULL;
1564 xpl = mtod(m, struct sadb_x_policy *);
1565 bzero(xpl, tlen);
1566
1567 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1568 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1569 xpl->sadb_x_policy_type = sp->policy;
1570 xpl->sadb_x_policy_dir = sp->spidx.dir;
1571 xpl->sadb_x_policy_id = sp->id;
1572 p = (caddr_t)xpl + sizeof(*xpl);
1573
1574 /* if is the policy for ipsec ? */
1575 if (sp->policy == IPSEC_POLICY_IPSEC) {
1576 struct sadb_x_ipsecrequest *xisr;
1577 struct ipsecrequest *isr;
1578
1579 for (isr = sp->req; isr != NULL; isr = isr->next) {
1580
1581 xisr = (struct sadb_x_ipsecrequest *)p;
1582
1583 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1584 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1585 xisr->sadb_x_ipsecrequest_level = isr->level;
1586 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1587
1588 p += sizeof(*xisr);
1589 bcopy(&isr->saidx.src, p, isr->saidx.src.ss_len);
1590 p += isr->saidx.src.ss_len;
1591 bcopy(&isr->saidx.dst, p, isr->saidx.dst.ss_len);
1592 p += isr->saidx.src.ss_len;
1593
1594 xisr->sadb_x_ipsecrequest_len =
1595 PFKEY_ALIGN8(sizeof(*xisr)
1596 + isr->saidx.src.ss_len
1597 + isr->saidx.dst.ss_len);
1598 }
1599 }
1600
1601 return m;
1602}
1603
1604/* m will not be freed nor modified */
1605static struct mbuf *
984263bc
MD
1606key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1607 int ndeep, int nitem, ...)
984263bc 1608{
e2565a42 1609 __va_list ap;
984263bc
MD
1610 int idx;
1611 int i;
1612 struct mbuf *result = NULL, *n;
1613 int len;
1614
1615 if (m == NULL || mhp == NULL)
1616 panic("null pointer passed to key_gather");
1617
e2565a42 1618 __va_start(ap, nitem);
984263bc 1619 for (i = 0; i < nitem; i++) {
e2565a42 1620 idx = __va_arg(ap, int);
984263bc
MD
1621 if (idx < 0 || idx > SADB_EXT_MAX)
1622 goto fail;
1623 /* don't attempt to pull empty extension */
1624 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1625 continue;
1626 if (idx != SADB_EXT_RESERVED &&
1627 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1628 continue;
1629
1630 if (idx == SADB_EXT_RESERVED) {
1631 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1632#ifdef DIAGNOSTIC
1633 if (len > MHLEN)
1634 panic("assumption failed");
1635#endif
74f1caca 1636 MGETHDR(n, MB_DONTWAIT, MT_DATA);
984263bc
MD
1637 if (!n)
1638 goto fail;
1639 n->m_len = len;
1640 n->m_next = NULL;
1641 m_copydata(m, 0, sizeof(struct sadb_msg),
1642 mtod(n, caddr_t));
1643 } else if (i < ndeep) {
1644 len = mhp->extlen[idx];
1645 n = key_alloc_mbuf(len);
1646 if (!n || n->m_next) { /*XXX*/
1647 if (n)
1648 m_freem(n);
1649 goto fail;
1650 }
1651 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1652 mtod(n, caddr_t));
1653 } else {
1654 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
74f1caca 1655 MB_DONTWAIT);
984263bc
MD
1656 }
1657 if (n == NULL)
1658 goto fail;
1659
1660 if (result)
1661 m_cat(result, n);
1662 else
1663 result = n;
1664 }
e2565a42 1665 __va_end(ap);
984263bc
MD
1666
1667 if ((result->m_flags & M_PKTHDR) != 0) {
1668 result->m_pkthdr.len = 0;
1669 for (n = result; n; n = n->m_next)
1670 result->m_pkthdr.len += n->m_len;
1671 }
1672
1673 return result;
1674
1675fail:
1676 m_freem(result);
1677 return NULL;
1678}
1679
1680/*
1681 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1682 * add a entry to SP database, when received
1683 * <base, address(SD), (lifetime(H),) policy>
1684 * from the user(?).
1685 * Adding to SP database,
1686 * and send
1687 * <base, address(SD), (lifetime(H),) policy>
1688 * to the socket which was send.
1689 *
1690 * SPDADD set a unique policy entry.
1691 * SPDSETIDX like SPDADD without a part of policy requests.
1692 * SPDUPDATE replace a unique policy entry.
1693 *
1694 * m will always be freed.
1695 */
1696static int
9855a82b 1697key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
984263bc
MD
1698{
1699 struct sadb_address *src0, *dst0;
1700 struct sadb_x_policy *xpl0, *xpl;
1701 struct sadb_lifetime *lft = NULL;
1702 struct secpolicyindex spidx;
1703 struct secpolicy *newsp;
1704 struct timeval tv;
1705 int error;
1706
1707 /* sanity check */
1708 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1709 panic("key_spdadd: NULL pointer is passed.\n");
1710
1711 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1712 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1713 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1714 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1715 return key_senderror(so, m, EINVAL);
1716 }
1717 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1718 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1719 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1720 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1721 return key_senderror(so, m, EINVAL);
1722 }
1723 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1724 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1725 < sizeof(struct sadb_lifetime)) {
1726 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1727 return key_senderror(so, m, EINVAL);
1728 }
1729 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1730 }
1731
1732 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1733 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1734 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1735
1736 /* make secindex */
1737 /* XXX boundary check against sa_len */
1738 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1739 src0 + 1,
1740 dst0 + 1,
1741 src0->sadb_address_prefixlen,
1742 dst0->sadb_address_prefixlen,
1743 src0->sadb_address_proto,
1744 &spidx);
1745
1746 /* checking the direciton. */
1747 switch (xpl0->sadb_x_policy_dir) {
1748 case IPSEC_DIR_INBOUND:
1749 case IPSEC_DIR_OUTBOUND:
1750 break;
1751 default:
1752 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1753 mhp->msg->sadb_msg_errno = EINVAL;
1754 return 0;
1755 }
1756
1757 /* check policy */
1758 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1759 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1760 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1761 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1762 return key_senderror(so, m, EINVAL);
1763 }
1764
1765 /* policy requests are mandatory when action is ipsec. */
1766 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1767 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1768 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1769 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1770 return key_senderror(so, m, EINVAL);
1771 }
1772
1773 /*
1774 * checking there is SP already or not.
1775 * SPDUPDATE doesn't depend on whether there is a SP or not.
1776 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1777 * then error.
1778 */
1779 newsp = key_getsp(&spidx);
1780 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1781 if (newsp) {
1782 newsp->state = IPSEC_SPSTATE_DEAD;
1783 key_freesp(newsp);
1784 }
1785 } else {
1786 if (newsp != NULL) {
1787 key_freesp(newsp);
1788 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1789 return key_senderror(so, m, EEXIST);
1790 }
1791 }
1792
1793 /* allocation new SP entry */
1794 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1795 return key_senderror(so, m, error);
1796 }
1797
1798 if ((newsp->id = key_getnewspid()) == 0) {
1799 keydb_delsecpolicy(newsp);
1800 return key_senderror(so, m, ENOBUFS);
1801 }
1802
1803 /* XXX boundary check against sa_len */
1804 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1805 src0 + 1,
1806 dst0 + 1,
1807 src0->sadb_address_prefixlen,
1808 dst0->sadb_address_prefixlen,
1809 src0->sadb_address_proto,
1810 &newsp->spidx);
1811
1812 /* sanity check on addr pair */
1813 if (((struct sockaddr *)(src0 + 1))->sa_family !=
1814 ((struct sockaddr *)(dst0+ 1))->sa_family) {
1815 keydb_delsecpolicy(newsp);
1816 return key_senderror(so, m, EINVAL);
1817 }
1818 if (((struct sockaddr *)(src0 + 1))->sa_len !=
1819 ((struct sockaddr *)(dst0+ 1))->sa_len) {
1820 keydb_delsecpolicy(newsp);
1821 return key_senderror(so, m, EINVAL);
1822 }
1823#if 1
1824 if (newsp->req && newsp->req->saidx.src.ss_family) {
1825 struct sockaddr *sa;
1826 sa = (struct sockaddr *)(src0 + 1);
1827 if (sa->sa_family != newsp->req->saidx.src.ss_family) {
1828 keydb_delsecpolicy(newsp);
1829 return key_senderror(so, m, EINVAL);
1830 }
1831 }
1832 if (newsp->req && newsp->req->saidx.dst.ss_family) {
1833 struct sockaddr *sa;
1834 sa = (struct sockaddr *)(dst0 + 1);
1835 if (sa->sa_family != newsp->req->saidx.dst.ss_family) {
1836 keydb_delsecpolicy(newsp);
1837 return key_senderror(so, m, EINVAL);
1838 }
1839 }
1840#endif
1841
1842 microtime(&tv);
1843 newsp->created = tv.tv_sec;
1844 newsp->lastused = tv.tv_sec;
1845 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1846 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1847
1848 newsp->refcnt = 1; /* do not reclaim until I say I do */
1849 newsp->state = IPSEC_SPSTATE_ALIVE;
1850 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1851
1852 /* delete the entry in spacqtree */
1853 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1854 struct secspacq *spacq;
1855 if ((spacq = key_getspacq(&spidx)) != NULL) {
1856 /* reset counter in order to deletion by timehandler. */
1857 microtime(&tv);
1858 spacq->created = tv.tv_sec;
1859 spacq->count = 0;
1860 }
1861 }
1862
1863 {
1864 struct mbuf *n, *mpolicy;
1865 struct sadb_msg *newmsg;
1866 int off;
1867
1868 /* create new sadb_msg to reply. */
1869 if (lft) {
1870 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1871 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1872 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1873 } else {
1874 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1875 SADB_X_EXT_POLICY,
1876 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1877 }
1878 if (!n)
1879 return key_senderror(so, m, ENOBUFS);
1880
1881 if (n->m_len < sizeof(*newmsg)) {
1882 n = m_pullup(n, sizeof(*newmsg));
1883 if (!n)
1884 return key_senderror(so, m, ENOBUFS);
1885 }
1886 newmsg = mtod(n, struct sadb_msg *);
1887 newmsg->sadb_msg_errno = 0;
1888 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1889
1890 off = 0;
1891 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1892 sizeof(*xpl), &off);
1893 if (mpolicy == NULL) {
1894 /* n is already freed */
1895 return key_senderror(so, m, ENOBUFS);
1896 }
1897 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1898 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1899 m_freem(n);
1900 return key_senderror(so, m, EINVAL);
1901 }
1902 xpl->sadb_x_policy_id = newsp->id;
1903
1904 m_freem(m);
1905 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1906 }
1907}
1908
1909/*
1910 * get new policy id.
1911 * OUT:
1912 * 0: failure.
1913 * others: success.
1914 */
1915static u_int32_t
9855a82b 1916key_getnewspid(void)
984263bc
MD
1917{
1918 u_int32_t newid = 0;
1919 int count = key_spi_trycnt; /* XXX */
1920 struct secpolicy *sp;
1921
1922 /* when requesting to allocate spi ranged */
1923 while (count--) {
1924 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1925
1926 if ((sp = key_getspbyid(newid)) == NULL)
1927 break;
1928
1929 key_freesp(sp);
1930 }
1931
1932 if (count == 0 || newid == 0) {
1933 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1934 return 0;
1935 }
1936
1937 return newid;
1938}
1939
1940/*
1941 * SADB_SPDDELETE processing
1942 * receive
1943 * <base, address(SD), policy(*)>
1944 * from the user(?), and set SADB_SASTATE_DEAD,
1945 * and send,
1946 * <base, address(SD), policy(*)>
1947 * to the ikmpd.
1948 * policy(*) including direction of policy.
1949 *
1950 * m will always be freed.
1951 */
1952static int
9855a82b
SW
1953key_spddelete(struct socket *so, struct mbuf *m,
1954 const struct sadb_msghdr *mhp)
984263bc
MD
1955{
1956 struct sadb_address *src0, *dst0;
1957 struct sadb_x_policy *xpl0;
1958 struct secpolicyindex spidx;
1959 struct secpolicy *sp;
1960
1961 /* sanity check */
1962 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1963 panic("key_spddelete: NULL pointer is passed.\n");
1964
1965 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1966 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1967 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1968 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1969 return key_senderror(so, m, EINVAL);
1970 }
1971 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1972 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1973 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1974 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1975 return key_senderror(so, m, EINVAL);
1976 }
1977
1978 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1979 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1980 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1981
1982 /* make secindex */
1983 /* XXX boundary check against sa_len */
1984 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1985 src0 + 1,
1986 dst0 + 1,
1987 src0->sadb_address_prefixlen,
1988 dst0->sadb_address_prefixlen,
1989 src0->sadb_address_proto,
1990 &spidx);
1991
1992 /* checking the direciton. */
1993 switch (xpl0->sadb_x_policy_dir) {
1994 case IPSEC_DIR_INBOUND:
1995 case IPSEC_DIR_OUTBOUND:
1996 break;
1997 default:
1998 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
1999 return key_senderror(so, m, EINVAL);
2000 }
2001
2002 /* Is there SP in SPD ? */
2003 if ((sp = key_getsp(&spidx)) == NULL) {
2004 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
2005 return key_senderror(so, m, EINVAL);
2006 }
2007
2008 /* save policy id to buffer to be returned. */
2009 xpl0->sadb_x_policy_id = sp->id;
2010
2011 sp->state = IPSEC_SPSTATE_DEAD;
2012 key_freesp(sp);
2013
2014 {
2015 struct mbuf *n;
2016 struct sadb_msg *newmsg;
2017
2018 /* create new sadb_msg to reply. */
2019 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
2020 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
2021 if (!n)
2022 return key_senderror(so, m, ENOBUFS);
2023
2024 newmsg = mtod(n, struct sadb_msg *);
2025 newmsg->sadb_msg_errno = 0;
2026 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2027
2028 m_freem(m);
2029 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2030 }
2031}
2032
2033/*
2034 * SADB_SPDDELETE2 processing
2035 * receive
2036 * <base, policy(*)>
2037 * from the user(?), and set SADB_SASTATE_DEAD,
2038 * and send,
2039 * <base, policy(*)>
2040 * to the ikmpd.
2041 * policy(*) including direction of policy.
2042 *
2043 * m will always be freed.
2044 */
2045static int
9855a82b
SW
2046key_spddelete2(struct socket *so, struct mbuf *m,
2047 const struct sadb_msghdr *mhp)
984263bc
MD
2048{
2049 u_int32_t id;
2050 struct secpolicy *sp;
2051
2052 /* sanity check */
2053 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2054 panic("key_spddelete2: NULL pointer is passed.\n");
2055
2056 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2057 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2058 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2059 key_senderror(so, m, EINVAL);
2060 return 0;
2061 }
2062
2063 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2064
2065 /* Is there SP in SPD ? */
2066 if ((sp = key_getspbyid(id)) == NULL) {
2067 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2068 key_senderror(so, m, EINVAL);
2069 }
2070
2071 sp->state = IPSEC_SPSTATE_DEAD;
2072 key_freesp(sp);
2073
2074 {
2075 struct mbuf *n, *nn;
2076 struct sadb_msg *newmsg;
2077 int off, len;
2078
2079 /* create new sadb_msg to reply. */
2080 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2081
2082 if (len > MCLBYTES)
2083 return key_senderror(so, m, ENOBUFS);
74f1caca 2084 MGETHDR(n, MB_DONTWAIT, MT_DATA);
984263bc 2085 if (n && len > MHLEN) {
74f1caca 2086 MCLGET(n, MB_DONTWAIT);
984263bc
MD
2087 if ((n->m_flags & M_EXT) == 0) {
2088 m_freem(n);
2089 n = NULL;
2090 }
2091 }
2092 if (!n)
2093 return key_senderror(so, m, ENOBUFS);
2094
2095 n->m_len = len;
2096 n->m_next = NULL;
2097 off = 0;
2098
2099 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t) + off);
2100 off += PFKEY_ALIGN8(sizeof(struct sadb_msg));
2101
2102#ifdef DIAGNOSTIC
2103 if (off != len)
2104 panic("length inconsistency in key_spddelete2");
2105#endif
2106
2107 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
74f1caca 2108 mhp->extlen[SADB_X_EXT_POLICY], MB_DONTWAIT);
984263bc
MD
2109 if (!n->m_next) {
2110 m_freem(n);
2111 return key_senderror(so, m, ENOBUFS);
2112 }
2113
2114 n->m_pkthdr.len = 0;
2115 for (nn = n; nn; nn = nn->m_next)
2116 n->m_pkthdr.len += nn->m_len;
2117
2118 newmsg = mtod(n, struct sadb_msg *);
2119 newmsg->sadb_msg_errno = 0;
2120 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2121
2122 m_freem(m);
2123 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2124 }
2125}
2126
2127/*
2128 * SADB_X_GET processing
2129 * receive
2130 * <base, policy(*)>
2131 * from the user(?),
2132 * and send,
2133 * <base, address(SD), policy>
2134 * to the ikmpd.
2135 * policy(*) including direction of policy.
2136 *
2137 * m will always be freed.
2138 */
2139static int
9855a82b
SW
2140key_spdget(struct socket *so, struct mbuf *m,
2141 const struct sadb_msghdr *mhp)
984263bc
MD
2142{
2143 u_int32_t id;
2144 struct secpolicy *sp;
2145 struct mbuf *n;
2146
2147 /* sanity check */
2148 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2149 panic("key_spdget: NULL pointer is passed.\n");
2150
2151 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2152 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2153 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2154 return key_senderror(so, m, EINVAL);
2155 }
2156
2157 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2158
2159 /* Is there SP in SPD ? */
2160 if ((sp = key_getspbyid(id)) == NULL) {
2161 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2162 return key_senderror(so, m, ENOENT);
2163 }
2164
2165 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2166 if (n != NULL) {
2167 m_freem(m);
2168 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2169 } else
2170 return key_senderror(so, m, ENOBUFS);
2171}
2172
2173/*
2174 * SADB_X_SPDACQUIRE processing.
2175 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2176 * send
2177 * <base, policy(*)>
2178 * to KMD, and expect to receive
2179 * <base> with SADB_X_SPDACQUIRE if error occured,
2180 * or
2181 * <base, policy>
2182 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2183 * policy(*) is without policy requests.
2184 *
2185 * 0 : succeed
2186 * others: error number
2187 */
2188int
9855a82b 2189key_spdacquire(struct secpolicy *sp)
984263bc
MD
2190{
2191 struct mbuf *result = NULL, *m;
2192 struct secspacq *newspacq;
2193 int error;
2194
2195 /* sanity check */
2196 if (sp == NULL)
2197 panic("key_spdacquire: NULL pointer is passed.\n");
2198 if (sp->req != NULL)
2199 panic("key_spdacquire: called but there is request.\n");
2200 if (sp->policy != IPSEC_POLICY_IPSEC)
3f625015 2201 panic("key_spdacquire: policy mismatched. IPsec is expected.\n");
984263bc
MD
2202
2203 /* get a entry to check whether sent message or not. */
2204 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2205 if (key_blockacq_count < newspacq->count) {
2206 /* reset counter and do send message. */
2207 newspacq->count = 0;
2208 } else {
2209 /* increment counter and do nothing. */
2210 newspacq->count++;
2211 return 0;
2212 }
2213 } else {
2214 /* make new entry for blocking to send SADB_ACQUIRE. */
2215 if ((newspacq = key_newspacq(&sp->spidx)) == NULL)
2216 return ENOBUFS;
2217
2218 /* add to acqtree */
2219 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2220 }
2221
2222 /* create new sadb_msg to reply. */
2223 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2224 if (!m) {
2225 error = ENOBUFS;
2226 goto fail;
2227 }
2228 result = m;
2229
2230 result->m_pkthdr.len = 0;
2231 for (m = result; m; m = m->m_next)
2232 result->m_pkthdr.len += m->m_len;
2233
2234 mtod(result, struct sadb_msg *)->sadb_msg_len =
2235 PFKEY_UNIT64(result->m_pkthdr.len);
2236
2237 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2238
2239fail:
2240 if (result)
2241 m_freem(result);
2242 return error;
2243}
2244
2245/*
2246 * SADB_SPDFLUSH processing
2247 * receive
2248 * <base>
2249 * from the user, and free all entries in secpctree.
2250 * and send,
2251 * <base>
2252 * to the user.
2253 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2254 *
2255 * m will always be freed.
2256 */
2257static int
9855a82b
SW
2258key_spdflush(struct socket *so, struct mbuf *m,
2259 const struct sadb_msghdr *mhp)
984263bc
MD
2260{
2261 struct sadb_msg *newmsg;
2262 struct secpolicy *sp;
2263 u_int dir;
2264
2265 /* sanity check */
2266 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2267 panic("key_spdflush: NULL pointer is passed.\n");
2268
2269 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2270 return key_senderror(so, m, EINVAL);
2271
2272 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2273 LIST_FOREACH(sp, &sptree[dir], chain) {
2274 sp->state = IPSEC_SPSTATE_DEAD;
2275 }
2276 }
2277
2278 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2279 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2280 return key_senderror(so, m, ENOBUFS);
2281 }
2282
2283 if (m->m_next)
2284 m_freem(m->m_next);
2285 m->m_next = NULL;
2286 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2287 newmsg = mtod(m, struct sadb_msg *);
2288 newmsg->sadb_msg_errno = 0;
2289 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2290
2291 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2292}
2293
2294/*
2295 * SADB_SPDDUMP processing
2296 * receive
2297 * <base>
2298 * from the user, and dump all SP leaves
2299 * and send,
2300 * <base> .....
2301 * to the ikmpd.
2302 *
2303 * m will always be freed.
2304 */
2305static int
9855a82b
SW
2306key_spddump(struct socket *so, struct mbuf *m,
2307 const struct sadb_msghdr *mhp)
984263bc
MD
2308{
2309 struct secpolicy *sp;
2310 int cnt;
2311 u_int dir;
2312 struct mbuf *n;
2313
2314 /* sanity check */
2315 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2316 panic("key_spddump: NULL pointer is passed.\n");
2317
2318 /* search SPD entry and get buffer size. */
2319 cnt = 0;
2320 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2321 LIST_FOREACH(sp, &sptree[dir], chain) {
2322 cnt++;
2323 }
2324 }
2325
2326 if (cnt == 0)
2327 return key_senderror(so, m, ENOENT);
2328
2329 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2330 LIST_FOREACH(sp, &sptree[dir], chain) {
2331 --cnt;
2332 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2333 mhp->msg->sadb_msg_pid);
2334
2335 if (n)
2336 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2337 }
2338 }
2339
2340 m_freem(m);
2341 return 0;
2342}
2343
2344static struct mbuf *
9855a82b
SW
2345key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2346 u_int32_t pid)
984263bc
MD
2347{
2348 struct mbuf *result = NULL, *m;
2349
2350 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2351 if (!m)
2352 goto fail;
2353 result = m;
2354
2355 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2356 (struct sockaddr *)&sp->spidx.src, sp->spidx.prefs,
2357 sp->spidx.ul_proto);
2358 if (!m)
2359 goto fail;
2360 m_cat(result, m);
2361
2362 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2363 (struct sockaddr *)&sp->spidx.dst, sp->spidx.prefd,
2364 sp->spidx.ul_proto);
2365 if (!m)
2366 goto fail;
2367 m_cat(result, m);
2368
2369 m = key_sp2msg(sp);
2370 if (!m)
2371 goto fail;
2372 m_cat(result, m);
2373
2374 if ((result->m_flags & M_PKTHDR) == 0)
2375 goto fail;
2376
2377 if (result->m_len < sizeof(struct sadb_msg)) {
2378 result = m_pullup(result, sizeof(struct sadb_msg));
2379 if (result == NULL)
2380 goto fail;
2381 }
2382
2383 result->m_pkthdr.len = 0;
2384 for (m = result; m; m = m->m_next)
2385 result->m_pkthdr.len += m->m_len;
2386
2387 mtod(result, struct sadb_msg *)->sadb_msg_len =
2388 PFKEY_UNIT64(result->m_pkthdr.len);
2389
2390 return result;
2391
2392fail:
2393 m_freem(result);
2394 return NULL;
2395}
2396
2397/*
2398 * get PFKEY message length for security policy and request.
2399 */
2400static u_int
9855a82b 2401key_getspreqmsglen(struct secpolicy *sp)
984263bc
MD
2402{
2403 u_int tlen;
2404
2405 tlen = sizeof(struct sadb_x_policy);
2406
2407 /* if is the policy for ipsec ? */
2408 if (sp->policy != IPSEC_POLICY_IPSEC)
2409 return tlen;
2410
2411 /* get length of ipsec requests */
2412 {
2413 struct ipsecrequest *isr;
2414 int len;
2415
2416 for (isr = sp->req; isr != NULL; isr = isr->next) {
2417 len = sizeof(struct sadb_x_ipsecrequest)
2418 + isr->saidx.src.ss_len
2419 + isr->saidx.dst.ss_len;
2420
2421 tlen += PFKEY_ALIGN8(len);
2422 }
2423 }
2424
2425 return tlen;
2426}
2427
2428/*
2429 * SADB_SPDEXPIRE processing
2430 * send
2431 * <base, address(SD), lifetime(CH), policy>
2432 * to KMD by PF_KEY.
2433 *
2434 * OUT: 0 : succeed
2435 * others : error number
2436 */
2437static int
9855a82b 2438key_spdexpire(struct secpolicy *sp)
984263bc 2439{
984263bc
MD
2440 struct mbuf *result = NULL, *m;
2441 int len;
2442 int error = -1;
2443 struct sadb_lifetime *lt;
2444
2445 /* XXX: Why do we lock ? */
68b13d6b 2446 crit_enter();
984263bc
MD
2447
2448 /* sanity check */
2449 if (sp == NULL)
2450 panic("key_spdexpire: NULL pointer is passed.\n");
2451
2452 /* set msg header */
2453 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2454 if (!m) {
2455 error = ENOBUFS;
2456 goto fail;
2457 }
2458 result = m;
2459
2460 /* create lifetime extension (current and hard) */
2461 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2462 m = key_alloc_mbuf(len);
2463 if (!m || m->m_next) { /*XXX*/
2464 if (m)
2465 m_freem(m);
2466 error = ENOBUFS;
2467 goto fail;
2468 }
2469 bzero(mtod(m, caddr_t), len);
2470 lt = mtod(m, struct sadb_lifetime *);
2471 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2472 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2473 lt->sadb_lifetime_allocations = 0;
2474 lt->sadb_lifetime_bytes = 0;
2475 lt->sadb_lifetime_addtime = sp->created;
2476 lt->sadb_lifetime_usetime = sp->lastused;
2477 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2478 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2479 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2480 lt->sadb_lifetime_allocations = 0;
2481 lt->sadb_lifetime_bytes = 0;
2482 lt->sadb_lifetime_addtime = sp->lifetime;
2483 lt->sadb_lifetime_usetime = sp->validtime;
2484 m_cat(result, m);
2485
2486 /* set sadb_address for source */
2487 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2488 (struct sockaddr *)&sp->spidx.src,
2489 sp->spidx.prefs, sp->spidx.ul_proto);
2490 if (!m) {
2491 error = ENOBUFS;
2492 goto fail;
2493 }
2494 m_cat(result, m);
2495
2496 /* set sadb_address for destination */
2497 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2498 (struct sockaddr *)&sp->spidx.dst,
2499 sp->spidx.prefd, sp->spidx.ul_proto);
2500 if (!m) {
2501 error = ENOBUFS;
2502 goto fail;
2503 }
2504 m_cat(result, m);
2505
2506 /* set secpolicy */
2507 m = key_sp2msg(sp);
2508 if (!m) {
2509 error = ENOBUFS;
2510 goto fail;
2511 }
2512 m_cat(result, m);
2513
2514 if ((result->m_flags & M_PKTHDR) == 0) {
2515 error = EINVAL;
2516 goto fail;
2517 }
2518
2519 if (result->m_len < sizeof(struct sadb_msg)) {
2520 result = m_pullup(result, sizeof(struct sadb_msg));
2521 if (result == NULL) {
2522 error = ENOBUFS;
2523 goto fail;
2524 }
2525 }
2526
2527 result->m_pkthdr.len = 0;
2528 for (m = result; m; m = m->m_next)
2529 result->m_pkthdr.len += m->m_len;
2530
2531 mtod(result, struct sadb_msg *)->sadb_msg_len =
2532 PFKEY_UNIT64(result->m_pkthdr.len);
2533
2534 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2535
2536 fail:
2537 if (result)
2538 m_freem(result);
68b13d6b 2539 crit_exit();
984263bc
MD
2540 return error;
2541}
2542
2543/* %%% SAD management */
2544/*
2545 * allocating a memory for new SA head, and copy from the values of mhp.
2546 * OUT: NULL : failure due to the lack of memory.
2547 * others : pointer to new SA head.
2548 */
2549static struct secashead *
9855a82b 2550key_newsah(struct secasindex *saidx)
984263bc
MD
2551{
2552 struct secashead *newsah;
2553
2554 /* sanity check */
2555 if (saidx == NULL)
2556 panic("key_newsaidx: NULL pointer is passed.\n");
2557
2558 newsah = keydb_newsecashead();
2559 if (newsah == NULL)
2560 return NULL;
2561
2562 bcopy(saidx, &newsah->saidx, sizeof(newsah->saidx));
2563
2564 /* add to saidxtree */
2565 newsah->state = SADB_SASTATE_MATURE;
2566 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2567
2568 return(newsah);
2569}
2570
2571/*
2572 * delete SA index and all SA registerd.
2573 */
2574static void
9855a82b 2575key_delsah(struct secashead *sah)
984263bc
MD
2576{
2577 struct secasvar *sav, *nextsav;
2578 u_int stateidx, state;
984263bc
MD
2579 int zombie = 0;
2580
2581 /* sanity check */
2582 if (sah == NULL)
2583 panic("key_delsah: NULL pointer is passed.\n");
2584
68b13d6b 2585 crit_enter();
984263bc
MD
2586
2587 /* searching all SA registerd in the secindex. */
2588 for (stateidx = 0;
2589 stateidx < _ARRAYLEN(saorder_state_any);
2590 stateidx++) {
2591
2592 state = saorder_state_any[stateidx];
2593 for (sav = (struct secasvar *)LIST_FIRST(&sah->savtree[state]);
2594 sav != NULL;
2595 sav = nextsav) {
2596
2597 nextsav = LIST_NEXT(sav, chain);
2598
2599 if (sav->refcnt > 0) {
2600 /* give up to delete this sa */
2601 zombie++;
2602 continue;
2603 }
2604
2605 /* sanity check */
2606 KEY_CHKSASTATE(state, sav->state, "key_delsah");
2607
2608 key_freesav(sav);
2609
2610 /* remove back pointer */
2611 sav->sah = NULL;
2612 sav = NULL;
2613 }
2614 }
2615
2616 /* don't delete sah only if there are savs. */
2617 if (zombie) {
68b13d6b 2618 crit_exit();
984263bc
MD
2619 return;
2620 }
2621
2622 if (sah->sa_route.ro_rt) {
2623 RTFREE(sah->sa_route.ro_rt);
2624 sah->sa_route.ro_rt = (struct rtentry *)NULL;
2625 }
2626
2627 /* remove from tree of SA index */
2628 if (__LIST_CHAINED(sah))
2629 LIST_REMOVE(sah, chain);
2630
2631 KFREE(sah);
2632
68b13d6b 2633 crit_exit();
984263bc
MD
2634 return;
2635}
2636
2637/*
2638 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2639 * and copy the values of mhp into new buffer.
2640 * When SAD message type is GETSPI:
2641 * to set sequence number from acq_seq++,
2642 * to set zero to SPI.
2643 * not to call key_setsava().
2644 * OUT: NULL : fail
2645 * others : pointer to new secasvar.
2646 *
2647 * does not modify mbuf. does not free mbuf on error.
2648 */
2649static struct secasvar *
9855a82b
SW
2650key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp,
2651 struct secashead *sah, int *errp)
984263bc
MD
2652{
2653 struct secasvar *newsav;
2654 const struct sadb_sa *xsa;
2655
2656 /* sanity check */
2657 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2658 panic("key_newsa: NULL pointer is passed.\n");
2659
2660 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2661 if (newsav == NULL) {
2662 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2663 *errp = ENOBUFS;
2664 return NULL;
2665 }
2666 bzero((caddr_t)newsav, sizeof(struct secasvar));
2667
2668 switch (mhp->msg->sadb_msg_type) {
2669 case SADB_GETSPI:
2670 newsav->spi = 0;
2671
2672#ifdef IPSEC_DOSEQCHECK
2673 /* sync sequence number */
2674 if (mhp->msg->sadb_msg_seq == 0)
2675 newsav->seq =
2676 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2677 else
2678#endif
2679 newsav->seq = mhp->msg->sadb_msg_seq;
2680 break;
2681
2682 case SADB_ADD:
2683 /* sanity check */
2684 if (mhp->ext[SADB_EXT_SA] == NULL) {
2685 KFREE(newsav);
2686 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2687 *errp = EINVAL;
2688 return NULL;
2689 }
2690 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2691 newsav->spi = xsa->sadb_sa_spi;
2692 newsav->seq = mhp->msg->sadb_msg_seq;
2693 break;
2694 default:
2695 KFREE(newsav);
2696 *errp = EINVAL;
2697 return NULL;
2698 }
2699
2700 /* copy sav values */
2701 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2702 *errp = key_setsaval(newsav, m, mhp);
2703 if (*errp) {
2704 KFREE(newsav);
2705 return NULL;
2706 }
2707 }
2708
2709 /* reset created */
2710 {
2711 struct timeval tv;
2712 microtime(&tv);
2713 newsav->created = tv.tv_sec;
2714 }
2715
2716 newsav->pid = mhp->msg->sadb_msg_pid;
2717
2718 /* add to satree */
2719 newsav->sah = sah;
2720 newsav->refcnt = 1;
2721 newsav->state = SADB_SASTATE_LARVAL;
2722 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2723 secasvar, chain);
2724
2725 return newsav;
2726}
2727
2728/*
2729 * free() SA variable entry.
2730 */
2731static void
9855a82b 2732key_delsav(struct secasvar *sav)
984263bc
MD
2733{
2734 /* sanity check */
2735 if (sav == NULL)
2736 panic("key_delsav: NULL pointer is passed.\n");
2737
2738 if (sav->refcnt > 0)
2739 return; /* can't free */
2740
2741 /* remove from SA header */
2742 if (__LIST_CHAINED(sav))
2743 LIST_REMOVE(sav, chain);
2744
2745 if (sav->key_auth != NULL) {
2746 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2747 KFREE(sav->key_auth);
2748 sav->key_auth = NULL;
2749 }
2750 if (sav->key_enc != NULL) {
2751 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2752 KFREE(sav->key_enc);
2753 sav->key_enc = NULL;
2754 }
2755 if (sav->sched) {
2756 bzero(sav->sched, sav->schedlen);
2757 KFREE(sav->sched);
2758 sav->sched = NULL;
2759 }
2760 if (sav->replay != NULL) {
2761 keydb_delsecreplay(sav->replay);
2762 sav->replay = NULL;
2763 }
2764 if (sav->lft_c != NULL) {
2765 KFREE(sav->lft_c);
2766 sav->lft_c = NULL;
2767 }
2768 if (sav->lft_h != NULL) {
2769 KFREE(sav->lft_h);
2770 sav->lft_h = NULL;
2771 }
2772 if (sav->lft_s != NULL) {
2773 KFREE(sav->lft_s);
2774 sav->lft_s = NULL;
2775 }
2776 if (sav->iv != NULL) {
2777 KFREE(sav->iv);
2778 sav->iv = NULL;
2779 }
2780
2781 KFREE(sav);
2782
2783 return;
2784}
2785
2786/*
2787 * search SAD.
2788 * OUT:
2789 * NULL : not found
2790 * others : found, pointer to a SA.
2791 */
2792static struct secashead *
9855a82b 2793key_getsah(struct secasindex *saidx)
984263bc
MD
2794{
2795 struct secashead *sah;
2796
2797 LIST_FOREACH(sah, &sahtree, chain) {
2798 if (sah->state == SADB_SASTATE_DEAD)
2799 continue;
2800 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2801 return sah;
2802 }
2803
2804 return NULL;
2805}
2806
2807/*
2808 * check not to be duplicated SPI.
2809 * NOTE: this function is too slow due to searching all SAD.
2810 * OUT:
2811 * NULL : not found
2812 * others : found, pointer to a SA.
2813 */
2814static struct secasvar *
9855a82b 2815key_checkspidup(struct secasindex *saidx, u_int32_t spi)
984263bc
MD
2816{
2817 struct secashead *sah;
2818 struct secasvar *sav;
2819
2820 /* check address family */
2821 if (saidx->src.ss_family != saidx->dst.ss_family) {
2822 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2823 return NULL;
2824 }
2825
2826 /* check all SAD */
2827 LIST_FOREACH(sah, &sahtree, chain) {
2828 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2829 continue;
2830 sav = key_getsavbyspi(sah, spi);
2831 if (sav != NULL)
2832 return sav;
2833 }
2834
2835 return NULL;
2836}
2837
2838/*
2839 * search SAD litmited alive SA, protocol, SPI.
2840 * OUT:
2841 * NULL : not found
2842 * others : found, pointer to a SA.
2843 */
2844static struct secasvar *
9855a82b 2845key_getsavbyspi(struct secashead *sah, u_int32_t spi)
984263bc
MD
2846{
2847 struct secasvar *sav;
2848 u_int stateidx, state;
2849
2850 /* search all status */
2851 for (stateidx = 0;
2852 stateidx < _ARRAYLEN(saorder_state_alive);
2853 stateidx++) {
2854
2855 state = saorder_state_alive[stateidx];
2856 LIST_FOREACH(sav, &sah->savtree[state], chain) {
2857
2858 /* sanity check */
2859 if (sav->state != state) {
2860 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2861 "invalid sav->state (queue: %d SA: %d)\n",
2862 state, sav->state));
2863 continue;
2864 }
2865
2866 if (sav->spi == spi)
2867 return sav;
2868 }
2869 }
2870
2871 return NULL;
2872}
2873
2874/*
2875 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2876 * You must update these if need.
2877 * OUT: 0: success.
2878 * !0: failure.
2879 *
2880 * does not modify mbuf. does not free mbuf on error.
2881 */
2882static int
9855a82b
SW
2883key_setsaval(struct secasvar *sav, struct mbuf *m,
2884 const struct sadb_msghdr *mhp)
984263bc
MD
2885{
2886#ifdef IPSEC_ESP
2887 const struct esp_algorithm *algo;
2888#endif
2889 int error = 0;
2890 struct timeval tv;
2891
2892 /* sanity check */
2893 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2894 panic("key_setsaval: NULL pointer is passed.\n");
2895
2896 /* initialization */
2897 sav->replay = NULL;
2898 sav->key_auth = NULL;
2899 sav->key_enc = NULL;
2900 sav->sched = NULL;
2901 sav->schedlen = 0;
2902 sav->iv = NULL;
2903 sav->lft_c = NULL;
2904 sav->lft_h = NULL;
2905 sav->lft_s = NULL;
2906
2907 /* SA */
2908 if (mhp->ext[SADB_EXT_SA] != NULL) {
2909 const struct sadb_sa *sa0;
2910
2911 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2912 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
2913 error = EINVAL;
2914 goto fail;
2915 }
2916
2917 sav->alg_auth = sa0->sadb_sa_auth;
2918 sav->alg_enc = sa0->sadb_sa_encrypt;
2919 sav->flags = sa0->sadb_sa_flags;
2920
2921 /* replay window */
2922 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
2923 sav->replay = keydb_newsecreplay(sa0->sadb_sa_replay);
2924 if (sav->replay == NULL) {
2925 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2926 error = ENOBUFS;
2927 goto fail;
2928 }
2929 }
2930 }
2931
2932 /* Authentication keys */
2933 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2934 const struct sadb_key *key0;
2935 int len;
2936
2937 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2938 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2939
2940 error = 0;
2941 if (len < sizeof(*key0)) {
2942 error = EINVAL;
2943 goto fail;
2944 }
2945 switch (mhp->msg->sadb_msg_satype) {
2946 case SADB_SATYPE_AH:
2947 case SADB_SATYPE_ESP:
2948 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2949 sav->alg_auth != SADB_X_AALG_NULL)
2950 error = EINVAL;
2951 break;
2952 case SADB_X_SATYPE_IPCOMP:
2953 default:
2954 error = EINVAL;
2955 break;
2956 }
2957 if (error) {
2958 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2959 goto fail;
2960 }
2961
2962 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2963 if (sav->key_auth == NULL) {
2964 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2965 error = ENOBUFS;
2966 goto fail;
2967 }
2968 }
2969
2970 /* Encryption key */
2971 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2972 const struct sadb_key *key0;
2973 int len;
2974
2975 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2976 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2977
2978 error = 0;
2979 if (len < sizeof(*key0)) {
2980 error = EINVAL;
2981 goto fail;
2982 }
2983 switch (mhp->msg->sadb_msg_satype) {
2984 case SADB_SATYPE_ESP:
2985 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2986 sav->alg_enc != SADB_EALG_NULL) {
2987 error = EINVAL;
2988 break;
2989 }
2990 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
2991 if (sav->key_enc == NULL) {
2992 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2993 error = ENOBUFS;
2994 goto fail;
2995 }
2996 break;
2997 case SADB_X_SATYPE_IPCOMP:
2998 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
2999 error = EINVAL;
3000 sav->key_enc = NULL; /*just in case*/
3001 break;
3002 case SADB_SATYPE_AH:
3003 default:
3004 error = EINVAL;
3005 break;
3006 }
3007 if (error) {
3008 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
3009 goto fail;
3010 }
3011 }
3012
3013 /* set iv */
3014 sav->ivlen = 0;
3015
3016 switch (mhp->msg->sadb_msg_satype) {
3017 case SADB_SATYPE_ESP:
3018#ifdef IPSEC_ESP
3019 algo = esp_algorithm_lookup(sav->alg_enc);
3020 if (algo && algo->ivlen)
3021 sav->ivlen = (*algo->ivlen)(algo, sav);
3022 if (sav->ivlen == 0)
3023 break;
3024 KMALLOC(sav->iv, caddr_t, sav->ivlen);
3025 if (sav->iv == 0) {
3026 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3027 error = ENOBUFS;
3028 goto fail;
3029 }
3030
3031 /* initialize */
3032 key_randomfill(sav->iv, sav->ivlen);
3033#endif
3034 break;
3035 case SADB_SATYPE_AH:
3036 case SADB_X_SATYPE_IPCOMP:
3037 break;
3038 default:
3039 ipseclog((LOG_DEBUG, "key_setsaval: invalid SA type.\n"));
3040 error = EINVAL;
3041 goto fail;
3042 }
3043
3044 /* reset created */
3045 microtime(&tv);
3046 sav->created = tv.tv_sec;
3047
3048 /* make lifetime for CURRENT */
3049 KMALLOC(sav->lft_c, struct sadb_lifetime *,
3050 sizeof(struct sadb_lifetime));
3051 if (sav->lft_c == NULL) {
3052 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3053 error = ENOBUFS;
3054 goto fail;
3055 }
3056
3057 microtime(&tv);
3058
3059 sav->lft_c->sadb_lifetime_len =
3060 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
3061 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
3062 sav->lft_c->sadb_lifetime_allocations = 0;
3063 sav->lft_c->sadb_lifetime_bytes = 0;
3064 sav->lft_c->sadb_lifetime_addtime = tv.tv_sec;
3065 sav->lft_c->sadb_lifetime_usetime = 0;
3066
3067 /* lifetimes for HARD and SOFT */
3068 {
3069 const struct sadb_lifetime *lft0;
3070
3071 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
3072 if (lft0 != NULL) {
3073 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
3074 error = EINVAL;
3075 goto fail;
3076 }
3077 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
3078 sizeof(*lft0));
3079 if (sav->lft_h == NULL) {
3080 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3081 error = ENOBUFS;
3082 goto fail;
3083 }
3084 /* to be initialize ? */
3085 }
3086
3087 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
3088 if (lft0 != NULL) {
3089 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
3090 error = EINVAL;
3091 goto fail;
3092 }
3093 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3094 sizeof(*lft0));
3095 if (sav->lft_s == NULL) {
3096 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3097 error = ENOBUFS;
3098 goto fail;
3099 }
3100 /* to be initialize ? */
3101 }
3102 }
3103
3104 return 0;
3105
3106 fail:
3107 /* initialization */
3108 if (sav->replay != NULL) {
3109 keydb_delsecreplay(sav->replay);
3110 sav->replay = NULL;
3111 }
3112 if (sav->key_auth != NULL) {
3113 KFREE(sav->key_auth);
3114 sav->key_auth = NULL;
3115 }
3116 if (sav->key_enc != NULL) {
3117 KFREE(sav->key_enc);
3118 sav->key_enc = NULL;
3119 }
3120 if (sav->sched) {
3121 KFREE(sav->sched);
3122 sav->sched = NULL;
3123 }
3124 if (sav->iv != NULL) {
3125 KFREE(sav->iv);
3126 sav->iv = NULL;
3127 }
3128 if (sav->lft_c != NULL) {
3129 KFREE(sav->lft_c);
3130 sav->lft_c = NULL;
3131 }
3132 if (sav->lft_h != NULL) {
3133 KFREE(sav->lft_h);
3134 sav->lft_h = NULL;
3135 }
3136 if (sav->lft_s != NULL) {
3137 KFREE(sav->lft_s);
3138 sav->lft_s = NULL;
3139 }
3140
3141 return error;
3142}
3143
3144/*
3145 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3146 * OUT: 0: valid
3147 * other: errno
3148 */
3149static int
9855a82b 3150key_mature(struct secasvar *sav)
984263bc
MD
3151{
3152 int mature;
3153 int checkmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3154 int mustmask = 0; /* 2^0: ealg 2^1: aalg 2^2: calg */
3155
3156 mature = 0;
3157
3158 /* check SPI value */
3159 switch (sav->sah->saidx.proto) {
3160 case IPPROTO_ESP:
3161 case IPPROTO_AH:
3162 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3163 ipseclog((LOG_DEBUG,
3164 "key_mature: illegal range of SPI %u.\n",
3165 (u_int32_t)ntohl(sav->spi)));
3166 return EINVAL;
3167 }
3168 break;
3169 }
3170
3171 /* check satype */
3172 switch (sav->sah->saidx.proto) {
3173 case IPPROTO_ESP:
3174 /* check flags */
3175 if ((sav->flags & SADB_X_EXT_OLD)
3176 && (sav->flags & SADB_X_EXT_DERIV)) {
3177 ipseclog((LOG_DEBUG, "key_mature: "
3178 "invalid flag (derived) given to old-esp.\n"));
3179 return EINVAL;
3180 }
3181 if (sav->alg_auth == SADB_AALG_NONE)
3182 checkmask = 1;
3183 else
3184 checkmask = 3;
3185 mustmask = 1;
3186 break;
3187 case IPPROTO_AH:
3188 /* check flags */
3189 if (sav->flags & SADB_X_EXT_DERIV) {
3190 ipseclog((LOG_DEBUG, "key_mature: "
3191 "invalid flag (derived) given to AH SA.\n"));
3192 return EINVAL;
3193 }
3194 if (sav->alg_enc != SADB_EALG_NONE) {
3195 ipseclog((LOG_DEBUG, "key_mature: "
3196 "protocol and algorithm mismated.\n"));
3197 return(EINVAL);
3198 }
3199 checkmask = 2;
3200 mustmask = 2;
3201 break;
3202 case IPPROTO_IPCOMP:
3203 if (sav->alg_auth != SADB_AALG_NONE) {
3204 ipseclog((LOG_DEBUG, "key_mature: "
3205 "protocol and algorithm mismated.\n"));
3206 return(EINVAL);
3207 }
3208 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3209 && ntohl(sav->spi) >= 0x10000) {
3210 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3211 return(EINVAL);
3212 }
3213 checkmask = 4;
3214 mustmask = 4;
3215 break;
3216 default:
3217 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3218 return EPROTONOSUPPORT;
3219 }
3220
3221 /* check authentication algorithm */
3222 if ((checkmask & 2) != 0) {
3223 const struct ah_algorithm *algo;
3224 int keylen;
3225
3226 algo = ah_algorithm_lookup(sav->alg_auth);
3227 if (!algo) {
3228 ipseclog((LOG_DEBUG,"key_mature: "
3229 "unknown authentication algorithm.\n"));
3230 return EINVAL;
3231 }
3232
3233 /* algorithm-dependent check */
3234 if (sav->key_auth)
3235 keylen = sav->key_auth->sadb_key_bits;
3236 else
3237 keylen = 0;
3238 if (keylen < algo->keymin || algo->keymax < keylen) {
3239 ipseclog((LOG_DEBUG,
3240 "key_mature: invalid AH key length %d "
3241 "(%d-%d allowed)\n",
3242 keylen, algo->keymin, algo->keymax));
3243 return EINVAL;
3244 }
3245
3246 if (algo->mature) {
3247 if ((*algo->mature)(sav)) {
3248 /* message generated in per-algorithm function*/
3249 return EINVAL;
3250 } else
3251 mature = SADB_SATYPE_AH;
3252 }
3253
3254 if ((mustmask & 2) != 0 && mature != SADB_SATYPE_AH) {
3255 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for AH\n"));
3256 return EINVAL;
3257 }
3258 }
3259
3260 /* check encryption algorithm */
3261 if ((checkmask & 1) != 0) {
3262#ifdef IPSEC_ESP
3263 const struct esp_algorithm *algo;
3264 int keylen;
3265
3266 algo = esp_algorithm_lookup(sav->alg_enc);
3267 if (!algo) {
3268 ipseclog((LOG_DEBUG, "key_mature: unknown encryption algorithm.\n"));
3269 return EINVAL;
3270 }
3271
3272 /* algorithm-dependent check */
3273 if (sav->key_enc)
3274 keylen = sav->key_enc->sadb_key_bits;
3275 else
3276 keylen = 0;
3277 if (keylen < algo->keymin || algo->keymax < keylen) {
3278 ipseclog((LOG_DEBUG,
3279 "key_mature: invalid ESP key length %d "
3280 "(%d-%d allowed)\n",
3281 keylen, algo->keymin, algo->keymax));
3282 return EINVAL;
3283 }
3284
3285 if (algo->mature) {
3286 if ((*algo->mature)(sav)) {
3287 /* message generated in per-algorithm function*/
3288 return EINVAL;
3289 } else
3290 mature = SADB_SATYPE_ESP;
3291 }
3292
3293 if ((mustmask & 1) != 0 && mature != SADB_SATYPE_ESP) {
3294 ipseclog((LOG_DEBUG, "key_mature: no satisfy algorithm for ESP\n"));
3295 return EINVAL;
3296 }
3297#else /*IPSEC_ESP*/
3298 ipseclog((LOG_DEBUG, "key_mature: ESP not supported in this configuration\n"));
3299 return EINVAL;
3300#endif
3301 }
3302
3303 /* check compression algorithm */
3304 if ((checkmask & 4) != 0) {
3305 const struct ipcomp_algorithm *algo;
3306
3307 /* algorithm-dependent check */
3308 algo = ipcomp_algorithm_lookup(sav->alg_enc);
3309 if (!algo) {
3310 ipseclog((LOG_DEBUG, "key_mature: unknown compression algorithm.\n"));
3311 return EINVAL;
3312 }
3313 }
3314
3315 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3316
3317 return 0;
3318}
3319
3320/*
3321 * subroutine for SADB_GET and SADB_DUMP.
3322 */
3323static struct mbuf *
9855a82b
SW
3324key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3325 u_int32_t seq, u_int32_t pid)
984263bc
MD
3326{
3327 struct mbuf *result = NULL, *tres = NULL, *m;
3328 int l = 0;
3329 int i;
3330 void *p;
3331 int dumporder[] = {
3332 SADB_EXT_SA, SADB_X_EXT_SA2,
3333 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3334 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3335 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3336 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3337 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3338 };
3339
3340 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3341 if (m == NULL)
3342 goto fail;
3343 result = m;
3344
3345 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3346 m = NULL;
3347 p = NULL;
3348 switch (dumporder[i]) {
3349 case SADB_EXT_SA:
3350 m = key_setsadbsa(sav);
3351 if (!m)
3352 goto fail;
3353 break;
3354
3355 case SADB_X_EXT_SA2:
3356 m = key_setsadbxsa2(sav->sah->saidx.mode,
3357 sav->replay ? sav->replay->count : 0,
3358 sav->sah->saidx.reqid);
3359 if (!m)
3360 goto fail;
3361 break;
3362
3363 case SADB_EXT_ADDRESS_SRC:
3364 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3365 (struct sockaddr *)&sav->sah->saidx.src,
3366 FULLMASK, IPSEC_ULPROTO_ANY);
3367 if (!m)
3368 goto fail;
3369 break;
3370
3371 case SADB_EXT_ADDRESS_DST:
3372 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3373 (struct sockaddr *)&sav->sah->saidx.dst,
3374 FULLMASK, IPSEC_ULPROTO_ANY);
3375 if (!m)
3376 goto fail;
3377 break;
3378
3379 case SADB_EXT_KEY_AUTH:
3380 if (!sav->key_auth)
3381 continue;
3382 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3383 p = sav->key_auth;
3384 break;
3385
3386 case SADB_EXT_KEY_ENCRYPT:
3387 if (!sav->key_enc)
3388 continue;
3389 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3390 p = sav->key_enc;
3391 break;
3392
3393 case SADB_EXT_LIFETIME_CURRENT:
3394 if (!sav->lft_c)
3395 continue;
3396 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3397 p = sav->lft_c;
3398 break;
3399
3400 case SADB_EXT_LIFETIME_HARD:
3401 if (!sav->lft_h)
3402 continue;
3403 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3404 p = sav->lft_h;
3405 break;
3406
3407 case SADB_EXT_LIFETIME_SOFT:
3408 if (!sav->lft_s)
3409 continue;
3410 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3411 p = sav->lft_s;
3412 break;
3413
3414 case SADB_EXT_ADDRESS_PROXY:
3415 case SADB_EXT_IDENTITY_SRC:
3416 case SADB_EXT_IDENTITY_DST:
3417 /* XXX: should we brought from SPD ? */
3418 case SADB_EXT_SENSITIVITY:
3419 default:
3420 continue;
3421 }
3422
3423 if ((!m && !p) || (m && p))
3424 goto fail;
3425 if (p && tres) {
74f1caca 3426 M_PREPEND(tres, l, MB_DONTWAIT);
984263bc
MD
3427 if (!tres)
3428 goto fail;
3429 bcopy(p, mtod(tres, caddr_t), l);
3430 continue;
3431 }
3432 if (p) {
3433 m = key_alloc_mbuf(l);
3434 if (!m)
3435 goto fail;
3436 m_copyback(m, 0, l, p);
3437 }
3438
3439 if (tres)
3440 m_cat(m, tres);
3441 tres = m;
3442 }
3443
3444 m_cat(result, tres);
3445
3446 if (result->m_len < sizeof(struct sadb_msg)) {
3447 result = m_pullup(result, sizeof(struct sadb_msg));
3448 if (result == NULL)
3449 goto fail;
3450 }
3451
3452 result->m_pkthdr.len = 0;
3453 for (m = result; m; m = m->m_next)
3454 result->m_pkthdr.len += m->m_len;
3455
3456 mtod(result, struct sadb_msg *)->sadb_msg_len =
3457 PFKEY_UNIT64(result->m_pkthdr.len);
3458
3459 return result;
3460
3461fail:
3462 m_freem(result);
3463 m_freem(tres);
3464 return NULL;
3465}
3466
3467/*
3468 * set data into sadb_msg.
3469 */
3470static struct mbuf *
9855a82b
SW
3471key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype,
3472 u_int32_t seq, pid_t pid, u_int16_t reserved)
984263bc
MD
3473{
3474 struct mbuf *m;
3475 struct sadb_msg *p;
3476 int len;
3477
3478 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3479 if (len > MCLBYTES)
3480 return NULL;
74f1caca 3481 MGETHDR(m, MB_DONTWAIT, MT_DATA);
984263bc 3482 if (m && len > MHLEN) {
74f1caca 3483 MCLGET(m, MB_DONTWAIT);
984263bc
MD
3484 if ((m->m_flags & M_EXT) == 0) {
3485 m_freem(m);
3486 m = NULL;
3487 }
3488 }
3489 if (!m)
3490 return NULL;
3491 m->m_pkthdr.len = m->m_len = len;
3492 m->m_next = NULL;
3493
3494 p = mtod(m, struct sadb_msg *);
3495
3496 bzero(p, len);
3497 p->sadb_msg_version = PF_KEY_V2;
3498 p->sadb_msg_type = type;
3499 p->sadb_msg_errno = 0;
3500 p->sadb_msg_satype = satype;
3501 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3502 p->sadb_msg_reserved = reserved;
3503 p->sadb_msg_seq = seq;
3504 p->sadb_msg_pid = (u_int32_t)pid;
3505
3506 return m;
3507}
3508
3509/*
3510 * copy secasvar data into sadb_address.
3511 */
3512static struct mbuf *
9855a82b 3513key_setsadbsa(struct secasvar *sav)
984263bc
MD
3514{
3515 struct mbuf *m;
3516 struct sadb_sa *p;
3517 int len;
3518
3519 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3520 m = key_alloc_mbuf(len);
3521 if (!m || m->m_next) { /*XXX*/
3522 if (m)
3523 m_freem(m);
3524 return NULL;
3525 }
3526
3527 p = mtod(m, struct sadb_sa *);
3528
3529 bzero(p, len);
3530 p->sadb_sa_len = PFKEY_UNIT64(len);
3531 p->sadb_sa_exttype = SADB_EXT_SA;
3532 p->sadb_sa_spi = sav->spi;
3533 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3534 p->sadb_sa_state = sav->state;
3535 p->sadb_sa_auth = sav->alg_auth;
3536 p->sadb_sa_encrypt = sav->alg_enc;
3537 p->sadb_sa_flags = sav->flags;
3538
3539 return m;
3540}
3541
3542/*
3543 * set data into sadb_address.
3544 */
3545static struct mbuf *
9855a82b
SW
3546key_setsadbaddr(u_int16_t exttype, struct sockaddr *saddr,
3547 u_int8_t prefixlen, u_int16_t ul_proto)
984263bc
MD
3548{
3549 struct mbuf *m;
3550 struct sadb_address *p;
3551 size_t len;
3552
3553 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3554 PFKEY_ALIGN8(saddr->sa_len);
3555 m = key_alloc_mbuf(len);
3556 if (!m || m->m_next) { /*XXX*/
3557 if (m)
3558 m_freem(m);
3559 return NULL;
3560 }
3561
3562 p = mtod(m, struct sadb_address *);
3563
3564 bzero(p, len);
3565 p->sadb_address_len = PFKEY_UNIT64(len);
3566 p->sadb_address_exttype = exttype;
3567 p->sadb_address_proto = ul_proto;
3568 if (prefixlen == FULLMASK) {
3569 switch (saddr->sa_family) {
3570 case AF_INET:
3571 prefixlen = sizeof(struct in_addr) << 3;
3572 break;
3573 case AF_INET6:
3574 prefixlen = sizeof(struct in6_addr) << 3;
3575 break;
3576 default:
3577 ; /*XXX*/
3578 }
3579 }
3580 p->sadb_address_prefixlen = prefixlen;
3581 p->sadb_address_reserved = 0;
3582
3583 bcopy(saddr,
3584 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3585 saddr->sa_len);
3586
3587 return m;
3588}
3589
3590#if 0
3591/*
3592 * set data into sadb_ident.
3593 */
3594static struct mbuf *
9855a82b
SW
3595key_setsadbident(u_int16_t exttype, u_int16_t idtype, caddr_t string,
3596 int stringlen, u_int64_t id)
984263bc
MD
3597{
3598 struct mbuf *m;
3599 struct sadb_ident *p;
3600 size_t len;
3601
3602 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3603 m = key_alloc_mbuf(len);
3604 if (!m || m->m_next) { /*XXX*/
3605 if (m)
3606 m_freem(m);
3607 return NULL;
3608 }
3609
3610 p = mtod(m, struct sadb_ident *);
3611
3612 bzero(p, len);
3613 p->sadb_ident_len = PFKEY_UNIT64(len);
3614 p->sadb_ident_exttype = exttype;
3615 p->sadb_ident_type = idtype;
3616 p->sadb_ident_reserved = 0;
3617 p->sadb_ident_id = id;
3618
3619 bcopy(string,
3620 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3621 stringlen);
3622
3623 return m;
3624}
3625#endif
3626
3627/*
3628 * set data into sadb_x_sa2.
3629 */
3630static struct mbuf *
9855a82b 3631key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
984263bc
MD
3632{
3633 struct mbuf *m;
3634 struct sadb_x_sa2 *p;
3635 size_t len;
3636
3637 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3638 m = key_alloc_mbuf(len);
3639 if (!m || m->m_next) { /*XXX*/
3640 if (m)
3641 m_freem(m);
3642 return NULL;
3643 }
3644
3645 p = mtod(m, struct sadb_x_sa2 *);
3646
3647 bzero(p, len);
3648 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3649 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3650 p->sadb_x_sa2_mode = mode;
3651 p->sadb_x_sa2_reserved1 = 0;
3652 p->sadb_x_sa2_reserved2 = 0;
3653 p->sadb_x_sa2_sequence = seq;
3654 p->sadb_x_sa2_reqid = reqid;
3655
3656 return m;
3657}
3658
3659/*
3660 * set data into sadb_x_policy
3661 */
3662static struct mbuf *
9855a82b 3663key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
984263bc
MD
3664{
3665 struct mbuf *m;
3666 struct sadb_x_policy *p;
3667 size_t len;
3668
3669 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3670 m = key_alloc_mbuf(len);
3671 if (!m || m->m_next) { /*XXX*/
3672 if (m)
3673 m_freem(m);
3674 return NULL;
3675 }
3676
3677 p = mtod(m, struct sadb_x_policy *);
3678
3679 bzero(p, len);
3680 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3681 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3682 p->sadb_x_policy_type = type;
3683 p->sadb_x_policy_dir = dir;
3684 p->sadb_x_policy_id = id;
3685
3686 return m;
3687}
3688
3689/* %%% utilities */
3690/*
3691 * copy a buffer into the new buffer allocated.
3692 */
3693static void *
9855a82b 3694key_newbuf(const void *src, u_int len)
984263bc
MD
3695{
3696 caddr_t new;
3697
3698 KMALLOC(new, caddr_t, len);
3699 if (new == NULL) {
3700 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3701 return NULL;
3702 }
3703 bcopy(src, new, len);
3704
3705 return new;
3706}
3707
3708/* compare my own address
3709 * OUT: 1: true, i.e. my address.
3710 * 0: false
3711 */
3712int
9855a82b 3713key_ismyaddr(struct sockaddr *sa)
984263bc
MD
3714{
3715#ifdef INET
3716 struct sockaddr_in *sin;
1b562c24 3717 struct in_ifaddr_container *iac;
984263bc
MD
3718#endif
3719
3720 /* sanity check */
3721 if (sa == NULL)
3722 panic("key_ismyaddr: NULL pointer is passed.\n");
3723
3724 switch (sa->sa_family) {
3725#ifdef INET
3726 case AF_INET:
3727 sin = (struct sockaddr_in *)sa;
1b562c24
SZ
3728 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
3729 struct in_ifaddr *ia = iac->ia;
3730
984263bc
MD
3731 if (sin->sin_family == ia->ia_addr.sin_family &&
3732 sin->sin_len == ia->ia_addr.sin_len &&
3733 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3734 {
3735 return 1;
3736 }
3737 }
3738 break;
3739#endif
3740#ifdef INET6
3741 case AF_INET6:
3742 return key_ismyaddr6((struct sockaddr_in6 *)sa);
3743#endif
3744 }
3745
3746 return 0;
3747}
3748
3749#ifdef INET6
3750/*
3751 * compare my own address for IPv6.
3752 * 1: ours
3753 * 0: other
3754 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3755 */
3756#include <netinet6/in6_var.h>
3757
3758static int
9855a82b 3759key_ismyaddr6(struct sockaddr_in6 *sin6)
984263bc
MD
3760{
3761 struct in6_ifaddr *ia;
3762 struct in6_multi *in6m;
3763
3764 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3765 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3766 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3767 return 1;
3768
3769 /*
3770 * XXX Multicast
3771 * XXX why do we care about multlicast here while we don't care
3772 * about IPv4 multicast??
3773 * XXX scope
3774 */
3775 in6m = NULL;
3776 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3777 if (in6m)
3778 return 1;
3779 }
3780
3781 /* loopback, just for safety */
3782 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3783 return 1;
3784
3785 return 0;
3786}
3787#endif /*INET6*/
3788
3789/*
3790 * compare two secasindex structure.
3791 * flag can specify to compare 2 saidxes.
3792 * compare two secasindex structure without both mode and reqid.
3793 * don't compare port.
3794 * IN:
3795 * saidx0: source, it can be in SAD.
3796 * saidx1: object.
3797 * OUT:
3798 * 1 : equal
3799 * 0 : not equal
3800 */
3801static int
9855a82b
SW
3802key_cmpsaidx(struct secasindex *saidx0, struct secasindex *saidx1,
3803 int flag)
984263bc
MD
3804{
3805 /* sanity */
3806 if (saidx0 == NULL && saidx1 == NULL)
3807 return 1;
3808
3809 if (saidx0 == NULL || saidx1 == NULL)
3810 return 0;
3811
3812 if (saidx0->proto != saidx1->proto)
3813 return 0;
3814
3815 if (flag == CMP_EXACTLY) {
3816 if (saidx0->mode != saidx1->mode)
3817 return 0;
3818 if (saidx0->reqid != saidx1->reqid)
3819 return 0;
3820 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.ss_len) != 0 ||
3821 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.ss_len) != 0)
3822 return 0;
3823 } else {
3824
3825 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3826 if (flag == CMP_MODE_REQID
3827 ||flag == CMP_REQID) {
3828 /*
3829 * If reqid of SPD is non-zero, unique SA is required.
3830 * The result must be of same reqid in this case.
3831 */
3832 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3833 return 0;
3834 }
3835
3836 if (flag == CMP_MODE_REQID) {
3837 if (saidx0->mode != IPSEC_MODE_ANY
3838 && saidx0->mode != saidx1->mode)
3839 return 0;
3840 }
3841
3842 if (key_sockaddrcmp((struct sockaddr *)&saidx0->src,
3843 (struct sockaddr *)&saidx1->src, 0) != 0) {
3844 return 0;
3845 }
3846 if (key_sockaddrcmp((struct sockaddr *)&saidx0->dst,
3847 (struct sockaddr *)&saidx1->dst, 0) != 0) {
3848 return 0;
3849 }
3850 }
3851
3852 return 1;
3853}
3854
3855/*
3856 * compare two secindex structure exactly.
3857 * IN:
3858 * spidx0: source, it is often in SPD.
3859 * spidx1: object, it is often from PFKEY message.
3860 * OUT:
3861 * 1 : equal
3862 * 0 : not equal
3863 */
3864static int
9855a82b
SW
3865key_cmpspidx_exactly(struct secpolicyindex *spidx0,
3866 struct secpolicyindex *spidx1)
984263bc
MD
3867{
3868 /* sanity */
3869 if (spidx0 == NULL && spidx1 == NULL)
3870 return 1;
3871
3872 if (spidx0 == NULL || spidx1 == NULL)
3873 return 0;
3874
3875 if (spidx0->prefs != spidx1->prefs
3876 || spidx0->prefd != spidx1->prefd
3877 || spidx0->ul_proto != spidx1->ul_proto)
3878 return 0;
3879
3880 if (key_sockaddrcmp((struct sockaddr *)&spidx0->src,
3881 (struct sockaddr *)&spidx1->src, 1) != 0) {
3882 return 0;
3883 }
3884 if (key_sockaddrcmp((struct sockaddr *)&spidx0->dst,
3885 (struct sockaddr *)&spidx1->dst, 1) != 0) {
3886 return 0;
3887 }
3888
3889 return 1;
3890}
3891
3892/*
3893 * compare two secindex structure with mask.
3894 * IN:
3895 * spidx0: source, it is often in SPD.
3896 * spidx1: object, it is often from IP header.
3897 * OUT:
3898 * 1 : equal
3899 * 0 : not equal
3900 */
3901static int
9855a82b
SW
3902key_cmpspidx_withmask(struct secpolicyindex *spidx0,
3903 struct secpolicyindex *spidx1)
984263bc
MD
3904{
3905 /* sanity */
3906 if (spidx0 == NULL && spidx1 == NULL)
3907 return 1;
3908
3909 if (spidx0 == NULL || spidx1 == NULL)
3910 return 0;
3911
3912 if (spidx0->src.ss_family != spidx1->src.ss_family ||
3913 spidx0->dst.ss_family != spidx1->dst.ss_family ||
3914 spidx0->src.ss_len != spidx1->src.ss_len ||
3915 spidx0->dst.ss_len != spidx1->dst.ss_len)
3916 return 0;
3917
3918 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3919 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3920 && spidx0->ul_proto != spidx1->ul_proto)
3921 return 0;
3922
3923 switch (spidx0->src.ss_family) {
3924 case AF_INET:
3925 if (satosin(&spidx0->src)->sin_port != IPSEC_PORT_ANY
3926 && satosin(&spidx0->src)->sin_port !=
3927 satosin(&spidx1->src)->sin_port)
3928 return 0;
3929 if (!key_bbcmp((caddr_t)&satosin(&spidx0->src)->sin_addr,
3930 (caddr_t)&satosin(&spidx1->src)->sin_addr, spidx0->prefs))
3931 return 0;
3932 break;
3933 case AF_INET6:
3934 if (satosin6(&spidx0->src)->sin6_port != IPSEC_PORT_ANY
3935 && satosin6(&spidx0->src)->sin6_port !=
3936 satosin6(&spidx1->src)->sin6_port)
3937 return 0;
3938 /*
3939 * scope_id check. if sin6_scope_id is 0, we regard it
3940 * as a wildcard scope, which matches any scope zone ID.
3941 */
3942 if (satosin6(&spidx0->src)->sin6_scope_id &&
3943 satosin6(&spidx1->src)->sin6_scope_id &&
3944 satosin6(&spidx0->src)->sin6_scope_id !=
3945 satosin6(&spidx1->src)->sin6_scope_id)
3946 return 0;
3947 if (!key_bbcmp((caddr_t)&satosin6(&spidx0->src)->sin6_addr,
3948 (caddr_t)&satosin6(&spidx1->src)->sin6_addr, spidx0->prefs))
3949 return 0;
3950 break;
3951 default:
3952 /* XXX */
3953 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.ss_len) != 0)
3954 return 0;
3955 break;
3956 }
3957
3958 switch (spidx0->dst.ss_family) {
3959 case AF_INET:
3960 if (satosin(&spidx0->dst)->sin_port != IPSEC_PORT_ANY
3961 && satosin(&spidx0->dst)->sin_port !=
3962 satosin(&spidx1->dst)->sin_port)
3963 return 0;
3964 if (!key_bbcmp((caddr_t)&satosin(&spidx0->dst)->sin_addr,
3965 (caddr_t)&satosin(&spidx1->dst)->sin_addr, spidx0->prefd))
3966 return 0;
3967 break;
3968 case AF_INET6:
3969 if (satosin6(&spidx0->dst)->sin6_port != IPSEC_PORT_ANY
3970 && satosin6(&spidx0->dst)->sin6_port !=
3971 satosin6(&spidx1->dst)->sin6_port)
3972 return 0;
3973 /*
3974 * scope_id check. if sin6_scope_id is 0, we regard it
3975 * as a wildcard scope, which matches any scope zone ID.
3976 */
3977 if (satosin6(&spidx0->src)->sin6_scope_id &&
3978 satosin6(&spidx1->src)->sin6_scope_id &&
3979