Parallelize in_ifaddrhead operation
[dragonfly.git] / sys / netproto / ipsec / key.c
CommitLineData
984263bc 1/* $FreeBSD: src/sys/netipsec/key.c,v 1.3.2.1 2003/01/24 05:11:35 sam Exp $ */
1b562c24 2/* $DragonFly: src/sys/netproto/ipsec/key.c,v 1.26 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>
57
58#include <net/if.h>
59#include <net/route.h>
60#include <net/raw_cb.h>
61
62#include <netinet/in.h>
63#include <netinet/in_systm.h>
64#include <netinet/ip.h>
65#include <netinet/in_var.h>
66
67#ifdef INET6
68#include <netinet/ip6.h>
69#include <netinet6/in6_var.h>
70#include <netinet6/ip6_var.h>
71#endif /* INET6 */
72
73#ifdef INET
74#include <netinet/in_pcb.h>
75#endif
76#ifdef INET6
77#include <netinet6/in6_pcb.h>
78#endif /* INET6 */
79
80#include <net/pfkeyv2.h>
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81#include <netproto/ipsec/keydb.h>
82#include <netproto/ipsec/key.h>
83#include <netproto/ipsec/keysock.h>
84#include <netproto/ipsec/key_debug.h>
984263bc 85
bf844ffa 86#include <netproto/ipsec/ipsec.h>
984263bc 87#ifdef INET6
bf844ffa 88#include <netproto/ipsec/ipsec6.h>
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89#endif
90
bf844ffa 91#include <netproto/ipsec/xform.h>
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92
93#include <machine/stdarg.h>
94
95/* randomness */
96#include <sys/random.h>
97
98#include <net/net_osdep.h>
99
100#define FULLMASK 0xff
101#define _BITS(bytes) ((bytes) << 3)
102
103/*
104 * Note on SA reference counting:
105 * - SAs that are not in DEAD state will have (total external reference + 1)
106 * following value in reference count field. they cannot be freed and are
107 * referenced from SA header.
108 * - SAs that are in DEAD state will have (total external reference)
109 * in reference count field. they are ready to be freed. reference from
110 * SA header will be removed in key_delsav(), when the reference count
111 * field hits 0 (= no external reference other than from SA header.
112 */
113
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114#ifndef IPSEC_DEBUG2
115static struct callout key_timehandler_ch;
116#endif
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117u_int32_t key_debug_level = 0;
118static u_int key_spi_trycnt = 1000;
119static u_int32_t key_spi_minval = 0x100;
120static u_int32_t key_spi_maxval = 0x0fffffff; /* XXX */
121static u_int32_t policy_id = 0;
122static u_int key_int_random = 60; /*interval to initialize randseed,1(m)*/
123static u_int key_larval_lifetime = 30; /* interval to expire acquiring, 30(s)*/
124static int key_blockacq_count = 10; /* counter for blocking SADB_ACQUIRE.*/
125static int key_blockacq_lifetime = 20; /* lifetime for blocking SADB_ACQUIRE.*/
126static int key_prefered_oldsa = 1; /* prefered old sa rather than new sa.*/
127
128static u_int32_t acq_seq = 0;
129static int key_tick_init_random = 0;
130
131static LIST_HEAD(_sptree, secpolicy) sptree[IPSEC_DIR_MAX]; /* SPD */
132static LIST_HEAD(_sahtree, secashead) sahtree; /* SAD */
133static LIST_HEAD(_regtree, secreg) regtree[SADB_SATYPE_MAX + 1];
134 /* registed list */
135#ifndef IPSEC_NONBLOCK_ACQUIRE
136static LIST_HEAD(_acqtree, secacq) acqtree; /* acquiring list */
137#endif
138static LIST_HEAD(_spacqtree, secspacq) spacqtree; /* SP acquiring list */
139
140/* search order for SAs */
141static u_int saorder_state_valid[] = {
142 SADB_SASTATE_DYING, SADB_SASTATE_MATURE,
143 /*
144 * This order is important because we must select the oldest SA
145 * for outbound processing. For inbound, This is not important.
146 */
147};
148static u_int saorder_state_alive[] = {
149 /* except DEAD */
150 SADB_SASTATE_MATURE, SADB_SASTATE_DYING, SADB_SASTATE_LARVAL
151};
152static u_int saorder_state_any[] = {
153 SADB_SASTATE_MATURE, SADB_SASTATE_DYING,
154 SADB_SASTATE_LARVAL, SADB_SASTATE_DEAD
155};
156
157static const int minsize[] = {
158 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
159 sizeof(struct sadb_sa), /* SADB_EXT_SA */
160 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
161 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
162 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
163 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_SRC */
164 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_DST */
165 sizeof(struct sadb_address), /* SADB_EXT_ADDRESS_PROXY */
166 sizeof(struct sadb_key), /* SADB_EXT_KEY_AUTH */
167 sizeof(struct sadb_key), /* SADB_EXT_KEY_ENCRYPT */
168 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_SRC */
169 sizeof(struct sadb_ident), /* SADB_EXT_IDENTITY_DST */
170 sizeof(struct sadb_sens), /* SADB_EXT_SENSITIVITY */
171 sizeof(struct sadb_prop), /* SADB_EXT_PROPOSAL */
172 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_AUTH */
173 sizeof(struct sadb_supported), /* SADB_EXT_SUPPORTED_ENCRYPT */
174 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
175 0, /* SADB_X_EXT_KMPRIVATE */
176 sizeof(struct sadb_x_policy), /* SADB_X_EXT_POLICY */
177 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
178};
179static const int maxsize[] = {
180 sizeof(struct sadb_msg), /* SADB_EXT_RESERVED */
181 sizeof(struct sadb_sa), /* SADB_EXT_SA */
182 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_CURRENT */
183 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_HARD */
184 sizeof(struct sadb_lifetime), /* SADB_EXT_LIFETIME_SOFT */
185 0, /* SADB_EXT_ADDRESS_SRC */
186 0, /* SADB_EXT_ADDRESS_DST */
187 0, /* SADB_EXT_ADDRESS_PROXY */
188 0, /* SADB_EXT_KEY_AUTH */
189 0, /* SADB_EXT_KEY_ENCRYPT */
190 0, /* SADB_EXT_IDENTITY_SRC */
191 0, /* SADB_EXT_IDENTITY_DST */
192 0, /* SADB_EXT_SENSITIVITY */
193 0, /* SADB_EXT_PROPOSAL */
194 0, /* SADB_EXT_SUPPORTED_AUTH */
195 0, /* SADB_EXT_SUPPORTED_ENCRYPT */
196 sizeof(struct sadb_spirange), /* SADB_EXT_SPIRANGE */
197 0, /* SADB_X_EXT_KMPRIVATE */
198 0, /* SADB_X_EXT_POLICY */
199 sizeof(struct sadb_x_sa2), /* SADB_X_SA2 */
200};
201
202static int ipsec_esp_keymin = 256;
203static int ipsec_esp_auth = 0;
204static int ipsec_ah_keymin = 128;
205
206#ifdef SYSCTL_DECL
207SYSCTL_DECL(_net_key);
208#endif
209
210SYSCTL_INT(_net_key, KEYCTL_DEBUG_LEVEL, debug, CTLFLAG_RW, \
211 &key_debug_level, 0, "");
212
213/* max count of trial for the decision of spi value */
214SYSCTL_INT(_net_key, KEYCTL_SPI_TRY, spi_trycnt, CTLFLAG_RW, \
215 &key_spi_trycnt, 0, "");
216
217/* minimum spi value to allocate automatically. */
218SYSCTL_INT(_net_key, KEYCTL_SPI_MIN_VALUE, spi_minval, CTLFLAG_RW, \
219 &key_spi_minval, 0, "");
220
221/* maximun spi value to allocate automatically. */
222SYSCTL_INT(_net_key, KEYCTL_SPI_MAX_VALUE, spi_maxval, CTLFLAG_RW, \
223 &key_spi_maxval, 0, "");
224
225/* interval to initialize randseed */
226SYSCTL_INT(_net_key, KEYCTL_RANDOM_INT, int_random, CTLFLAG_RW, \
227 &key_int_random, 0, "");
228
229/* lifetime for larval SA */
230SYSCTL_INT(_net_key, KEYCTL_LARVAL_LIFETIME, larval_lifetime, CTLFLAG_RW, \
231 &key_larval_lifetime, 0, "");
232
233/* counter for blocking to send SADB_ACQUIRE to IKEd */
234SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_COUNT, blockacq_count, CTLFLAG_RW, \
235 &key_blockacq_count, 0, "");
236
237/* lifetime for blocking to send SADB_ACQUIRE to IKEd */
238SYSCTL_INT(_net_key, KEYCTL_BLOCKACQ_LIFETIME, blockacq_lifetime, CTLFLAG_RW, \
239 &key_blockacq_lifetime, 0, "");
240
241/* ESP auth */
242SYSCTL_INT(_net_key, KEYCTL_ESP_AUTH, esp_auth, CTLFLAG_RW, \
243 &ipsec_esp_auth, 0, "");
244
245/* minimum ESP key length */
246SYSCTL_INT(_net_key, KEYCTL_ESP_KEYMIN, esp_keymin, CTLFLAG_RW, \
247 &ipsec_esp_keymin, 0, "");
248
249/* minimum AH key length */
250SYSCTL_INT(_net_key, KEYCTL_AH_KEYMIN, ah_keymin, CTLFLAG_RW, \
251 &ipsec_ah_keymin, 0, "");
252
253/* perfered old SA rather than new SA */
254SYSCTL_INT(_net_key, KEYCTL_PREFERED_OLDSA, prefered_oldsa, CTLFLAG_RW,\
255 &key_prefered_oldsa, 0, "");
256
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257#define __LIST_CHAINED(elm) \
258 (!((elm)->chain.le_next == NULL && (elm)->chain.le_prev == NULL))
259#define LIST_INSERT_TAIL(head, elm, type, field) \
260do {\
261 struct type *curelm = LIST_FIRST(head); \
262 if (curelm == NULL) {\
263 LIST_INSERT_HEAD(head, elm, field); \
264 } else { \
265 while (LIST_NEXT(curelm, field)) \
266 curelm = LIST_NEXT(curelm, field);\
267 LIST_INSERT_AFTER(curelm, elm, field);\
268 }\
269} while (0)
270
271#define KEY_CHKSASTATE(head, sav, name) \
272do { \
273 if ((head) != (sav)) { \
274 ipseclog((LOG_DEBUG, "%s: state mismatched (TREE=%d SA=%d)\n", \
275 (name), (head), (sav))); \
276 continue; \
277 } \
278} while (0)
279
280#define KEY_CHKSPDIR(head, sp, name) \
281do { \
282 if ((head) != (sp)) { \
283 ipseclog((LOG_DEBUG, "%s: direction mismatched (TREE=%d SP=%d), " \
284 "anyway continue.\n", \
285 (name), (head), (sp))); \
286 } \
287} while (0)
288
289MALLOC_DEFINE(M_SECA, "key mgmt", "security associations, key management");
290
291#if 1
292#define KMALLOC(p, t, n) \
efda3bd0 293 ((p) = (t) kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK))
984263bc 294#define KFREE(p) \
efda3bd0 295 kfree((caddr_t)(p), M_SECA)
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296#else
297#define KMALLOC(p, t, n) \
298do { \
efda3bd0 299 ((p) = (t)kmalloc((unsigned long)(n), M_SECA, M_INTWAIT | M_NULLOK)); \
a6ec04bc 300 kprintf("%s %d: %p <- KMALLOC(%s, %d)\n", \
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301 __FILE__, __LINE__, (p), #t, n); \
302} while (0)
303
304#define KFREE(p) \
305 do { \
a6ec04bc 306 kprintf("%s %d: %p -> KFREE()\n", __FILE__, __LINE__, (p)); \
efda3bd0 307 kfree((caddr_t)(p), M_SECA); \
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308 } while (0)
309#endif
310
311/*
312 * set parameters into secpolicyindex buffer.
313 * Must allocate secpolicyindex buffer passed to this function.
314 */
315#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \
316do { \
317 bzero((idx), sizeof(struct secpolicyindex)); \
318 (idx)->dir = (_dir); \
319 (idx)->prefs = (ps); \
320 (idx)->prefd = (pd); \
321 (idx)->ul_proto = (ulp); \
322 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
323 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
324} while (0)
325
326/*
327 * set parameters into secasindex buffer.
328 * Must allocate secasindex buffer before calling this function.
329 */
330#define KEY_SETSECASIDX(p, m, r, s, d, idx) \
331do { \
332 bzero((idx), sizeof(struct secasindex)); \
333 (idx)->proto = (p); \
334 (idx)->mode = (m); \
335 (idx)->reqid = (r); \
336 bcopy((s), &(idx)->src, ((const struct sockaddr *)(s))->sa_len); \
337 bcopy((d), &(idx)->dst, ((const struct sockaddr *)(d))->sa_len); \
338} while (0)
339
340/* key statistics */
341struct _keystat {
342 u_long getspi_count; /* the avarage of count to try to get new SPI */
343} keystat;
344
345struct sadb_msghdr {
346 struct sadb_msg *msg;
347 struct sadb_ext *ext[SADB_EXT_MAX + 1];
348 int extoff[SADB_EXT_MAX + 1];
349 int extlen[SADB_EXT_MAX + 1];
350};
351
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352static struct secasvar *key_allocsa_policy (const struct secasindex *);
353static void key_freesp_so (struct secpolicy **);
354static struct secasvar *key_do_allocsa_policy (struct secashead *, u_int);
355static void key_delsp (struct secpolicy *);
356static struct secpolicy *key_getsp (struct secpolicyindex *);
357static struct secpolicy *key_getspbyid (u_int32_t);
358static u_int32_t key_newreqid (void);
359static struct mbuf *key_gather_mbuf (struct mbuf *,
360 const struct sadb_msghdr *, int, int, ...);
361static int key_spdadd (struct socket *, struct mbuf *,
362 const struct sadb_msghdr *);
363static u_int32_t key_getnewspid (void);
364static int key_spddelete (struct socket *, struct mbuf *,
365 const struct sadb_msghdr *);
366static int key_spddelete2 (struct socket *, struct mbuf *,
367 const struct sadb_msghdr *);
368static int key_spdget (struct socket *, struct mbuf *,
369 const struct sadb_msghdr *);
370static int key_spdflush (struct socket *, struct mbuf *,
371 const struct sadb_msghdr *);
372static int key_spddump (struct socket *, struct mbuf *,
373 const struct sadb_msghdr *);
374static struct mbuf *key_setdumpsp (struct secpolicy *,
375 u_int8_t, u_int32_t, u_int32_t);
376static u_int key_getspreqmsglen (struct secpolicy *);
377static int key_spdexpire (struct secpolicy *);
378static struct secashead *key_newsah (struct secasindex *);
379static void key_delsah (struct secashead *);
380static struct secasvar *key_newsav (struct mbuf *,
984263bc 381 const struct sadb_msghdr *, struct secashead *, int *,
3e0c9cba 382 const char*, int);
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383#define KEY_NEWSAV(m, sadb, sah, e) \
384 key_newsav(m, sadb, sah, e, __FILE__, __LINE__)
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385static void key_delsav (struct secasvar *);
386static struct secashead *key_getsah (struct secasindex *);
387static struct secasvar *key_checkspidup (struct secasindex *, u_int32_t);
388static struct secasvar *key_getsavbyspi (struct secashead *, u_int32_t);
389static int key_setsaval (struct secasvar *, struct mbuf *,
390 const struct sadb_msghdr *);
391static int key_mature (struct secasvar *);
392static struct mbuf *key_setdumpsa (struct secasvar *, u_int8_t,
393 u_int8_t, u_int32_t, u_int32_t);
394static struct mbuf *key_setsadbmsg (u_int8_t, u_int16_t, u_int8_t,
395 u_int32_t, pid_t, u_int16_t);
396static struct mbuf *key_setsadbsa (struct secasvar *);
397static struct mbuf *key_setsadbaddr (u_int16_t,
398 const struct sockaddr *, u_int8_t, u_int16_t);
984263bc 399#if 0
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400static struct mbuf *key_setsadbident (u_int16_t, u_int16_t, caddr_t,
401 int, u_int64_t);
984263bc 402#endif
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403static struct mbuf *key_setsadbxsa2 (u_int8_t, u_int32_t, u_int32_t);
404static struct mbuf *key_setsadbxpolicy (u_int16_t, u_int8_t,
405 u_int32_t);
406static void *key_newbuf (const void *, u_int);
984263bc 407#ifdef INET6
3e0c9cba 408static int key_ismyaddr6 (struct sockaddr_in6 *);
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409#endif
410
411/* flags for key_cmpsaidx() */
412#define CMP_HEAD 1 /* protocol, addresses. */
413#define CMP_MODE_REQID 2 /* additionally HEAD, reqid, mode. */
414#define CMP_REQID 3 /* additionally HEAD, reaid. */
415#define CMP_EXACTLY 4 /* all elements. */
416static int key_cmpsaidx
3e0c9cba 417 (const struct secasindex *, const struct secasindex *, int);
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418
419static int key_cmpspidx_exactly
3e0c9cba 420 (struct secpolicyindex *, struct secpolicyindex *);
984263bc 421static int key_cmpspidx_withmask
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422 (struct secpolicyindex *, struct secpolicyindex *);
423static int key_sockaddrcmp (const struct sockaddr *, const struct sockaddr *, int);
424static int key_bbcmp (const void *, const void *, u_int);
425static void key_srandom (void);
426static u_int16_t key_satype2proto (u_int8_t);
427static u_int8_t key_proto2satype (u_int16_t);
428
429static int key_getspi (struct socket *, struct mbuf *,
430 const struct sadb_msghdr *);
431static u_int32_t key_do_getnewspi (struct sadb_spirange *,
432 struct secasindex *);
433static int key_update (struct socket *, struct mbuf *,
434 const struct sadb_msghdr *);
984263bc 435#ifdef IPSEC_DOSEQCHECK
3e0c9cba 436static struct secasvar *key_getsavbyseq (struct secashead *, u_int32_t);
984263bc 437#endif
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438static int key_add (struct socket *, struct mbuf *,
439 const struct sadb_msghdr *);
440static int key_setident (struct secashead *, struct mbuf *,
441 const struct sadb_msghdr *);
442static struct mbuf *key_getmsgbuf_x1 (struct mbuf *,
443 const struct sadb_msghdr *);
444static int key_delete (struct socket *, struct mbuf *,
445 const struct sadb_msghdr *);
446static int key_get (struct socket *, struct mbuf *,
447 const struct sadb_msghdr *);
448
449static void key_getcomb_setlifetime (struct sadb_comb *);
450static struct mbuf *key_getcomb_esp (void);
451static struct mbuf *key_getcomb_ah (void);
452static struct mbuf *key_getcomb_ipcomp (void);
453static struct mbuf *key_getprop (const struct secasindex *);
454
455static int key_acquire (const struct secasindex *, struct secpolicy *);
984263bc 456#ifndef IPSEC_NONBLOCK_ACQUIRE
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457static struct secacq *key_newacq (const struct secasindex *);
458static struct secacq *key_getacq (const struct secasindex *);
459static struct secacq *key_getacqbyseq (u_int32_t);
984263bc 460#endif
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461static struct secspacq *key_newspacq (struct secpolicyindex *);
462static struct secspacq *key_getspacq (struct secpolicyindex *);
463static int key_acquire2 (struct socket *, struct mbuf *,
464 const struct sadb_msghdr *);
465static int key_register (struct socket *, struct mbuf *,
466 const struct sadb_msghdr *);
467static int key_expire (struct secasvar *);
468static int key_flush (struct socket *, struct mbuf *,
469 const struct sadb_msghdr *);
470static int key_dump (struct socket *, struct mbuf *,
471 const struct sadb_msghdr *);
472static int key_promisc (struct socket *, struct mbuf *,
473 const struct sadb_msghdr *);
474static int key_senderror (struct socket *, struct mbuf *, int);
475static int key_validate_ext (const struct sadb_ext *, int);
476static int key_align (struct mbuf *, struct sadb_msghdr *);
984263bc 477#if 0
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478static const char *key_getfqdn (void);
479static const char *key_getuserfqdn (void);
984263bc 480#endif
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481static void key_sa_chgstate (struct secasvar *, u_int8_t);
482static struct mbuf *key_alloc_mbuf (int);
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483
484#define SA_ADDREF(p) do { \
485 (p)->refcnt++; \
486 KASSERT((p)->refcnt != 0, \
487 ("SA refcnt overflow at %s:%u", __FILE__, __LINE__)); \
488} while (0)
489#define SA_DELREF(p) do { \
490 KASSERT((p)->refcnt > 0, \
491 ("SA refcnt underflow at %s:%u", __FILE__, __LINE__)); \
492 (p)->refcnt--; \
493} while (0)
494
495#define SP_ADDREF(p) do { \
496 (p)->refcnt++; \
497 KASSERT((p)->refcnt != 0, \
498 ("SP refcnt overflow at %s:%u", __FILE__, __LINE__)); \
499} while (0)
500#define SP_DELREF(p) do { \
501 KASSERT((p)->refcnt > 0, \
502 ("SP refcnt underflow at %s:%u", __FILE__, __LINE__)); \
503 (p)->refcnt--; \
504} while (0)
505
506/*
507 * Return 0 when there are known to be no SP's for the specified
508 * direction. Otherwise return 1. This is used by IPsec code
509 * to optimize performance.
510 */
511int
512key_havesp(u_int dir)
513{
514 return (dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND ?
515 LIST_FIRST(&sptree[dir]) != NULL : 1);
516}
517
518/* %%% IPsec policy management */
519/*
520 * allocating a SP for OUTBOUND or INBOUND packet.
521 * Must call key_freesp() later.
522 * OUT: NULL: not found
523 * others: found and return the pointer.
524 */
525struct secpolicy *
526key_allocsp(struct secpolicyindex *spidx, u_int dir, const char* where, int tag)
527{
528 struct secpolicy *sp;
cb753a0e 529
984263bc
MD
530
531 KASSERT(spidx != NULL, ("key_allocsp: null spidx"));
532 KASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
533 ("key_allocsp: invalid direction %u", dir));
534
535 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 536 kprintf("DP key_allocsp from %s:%u\n", where, tag));
984263bc
MD
537
538 /* get a SP entry */
cb753a0e 539 crit_enter();
984263bc 540 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
a6ec04bc 541 kprintf("*** objects\n"); kdebug_secpolicyindex(spidx));
984263bc
MD
542
543 LIST_FOREACH(sp, &sptree[dir], chain) {
544 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
a6ec04bc 545 kprintf("*** in SPD\n");
cd52b1e6 546 kdebug_secpolicyindex(&sp->spidx));
984263bc
MD
547
548 if (sp->state == IPSEC_SPSTATE_DEAD)
549 continue;
550 if (key_cmpspidx_withmask(&sp->spidx, spidx))
551 goto found;
552 }
553 sp = NULL;
554found:
555 if (sp) {
556 /* sanity check */
557 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp");
558
559 /* found a SPD entry */
560 sp->lastused = time_second;
561 SP_ADDREF(sp);
562 }
cb753a0e 563 crit_exit();
984263bc
MD
564
565 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 566 kprintf("DP key_allocsp return SP:%p (ID=%u) refcnt %u\n",
984263bc
MD
567 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
568 return sp;
569}
570
571/*
572 * allocating a SP for OUTBOUND or INBOUND packet.
573 * Must call key_freesp() later.
574 * OUT: NULL: not found
575 * others: found and return the pointer.
576 */
577struct secpolicy *
578key_allocsp2(u_int32_t spi,
579 union sockaddr_union *dst,
580 u_int8_t proto,
581 u_int dir,
582 const char* where, int tag)
583{
584 struct secpolicy *sp;
cb753a0e 585
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MD
586
587 KASSERT(dst != NULL, ("key_allocsp2: null dst"));
588 KASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND,
589 ("key_allocsp2: invalid direction %u", dir));
590
591 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 592 kprintf("DP key_allocsp2 from %s:%u\n", where, tag));
984263bc
MD
593
594 /* get a SP entry */
cb753a0e 595 crit_enter();
984263bc 596 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
a6ec04bc
SW
597 kprintf("*** objects\n");
598 kprintf("spi %u proto %u dir %u\n", spi, proto, dir);
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MD
599 kdebug_sockaddr(&dst->sa));
600
601 LIST_FOREACH(sp, &sptree[dir], chain) {
602 KEYDEBUG(KEYDEBUG_IPSEC_DATA,
a6ec04bc 603 kprintf("*** in SPD\n");
984263bc
MD
604 kdebug_secpolicyindex(&sp->spidx));
605
606 if (sp->state == IPSEC_SPSTATE_DEAD)
607 continue;
608 /* compare simple values, then dst address */
609 if (sp->spidx.ul_proto != proto)
610 continue;
611 /* NB: spi's must exist and match */
612 if (!sp->req || !sp->req->sav || sp->req->sav->spi != spi)
613 continue;
614 if (key_sockaddrcmp(&sp->spidx.dst.sa, &dst->sa, 1) == 0)
615 goto found;
616 }
617 sp = NULL;
618found:
619 if (sp) {
620 /* sanity check */
621 KEY_CHKSPDIR(sp->spidx.dir, dir, "key_allocsp2");
622
623 /* found a SPD entry */
624 sp->lastused = time_second;
625 SP_ADDREF(sp);
626 }
cb753a0e 627 crit_exit();
984263bc
MD
628
629 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 630 kprintf("DP key_allocsp2 return SP:%p (ID=%u) refcnt %u\n",
984263bc
MD
631 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
632 return sp;
633}
634
635/*
636 * return a policy that matches this particular inbound packet.
637 * XXX slow
638 */
639struct secpolicy *
640key_gettunnel(const struct sockaddr *osrc,
641 const struct sockaddr *odst,
642 const struct sockaddr *isrc,
643 const struct sockaddr *idst,
644 const char* where, int tag)
645{
646 struct secpolicy *sp;
647 const int dir = IPSEC_DIR_INBOUND;
cb753a0e 648
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MD
649 struct ipsecrequest *r1, *r2, *p;
650 struct secpolicyindex spidx;
651
652 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 653 kprintf("DP key_gettunnel from %s:%u\n", where, tag));
984263bc
MD
654
655 if (isrc->sa_family != idst->sa_family) {
656 ipseclog((LOG_ERR, "protocol family mismatched %d != %d\n.",
657 isrc->sa_family, idst->sa_family));
658 sp = NULL;
659 goto done;
660 }
661
cb753a0e 662 crit_enter();
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MD
663 LIST_FOREACH(sp, &sptree[dir], chain) {
664 if (sp->state == IPSEC_SPSTATE_DEAD)
665 continue;
666
667 r1 = r2 = NULL;
668 for (p = sp->req; p; p = p->next) {
669 if (p->saidx.mode != IPSEC_MODE_TUNNEL)
670 continue;
671
672 r1 = r2;
673 r2 = p;
674
675 if (!r1) {
676 /* here we look at address matches only */
677 spidx = sp->spidx;
678 if (isrc->sa_len > sizeof(spidx.src) ||
679 idst->sa_len > sizeof(spidx.dst))
680 continue;
681 bcopy(isrc, &spidx.src, isrc->sa_len);
682 bcopy(idst, &spidx.dst, idst->sa_len);
683 if (!key_cmpspidx_withmask(&sp->spidx, &spidx))
684 continue;
685 } else {
686 if (key_sockaddrcmp(&r1->saidx.src.sa, isrc, 0) ||
687 key_sockaddrcmp(&r1->saidx.dst.sa, idst, 0))
688 continue;
689 }
690
691 if (key_sockaddrcmp(&r2->saidx.src.sa, osrc, 0) ||
692 key_sockaddrcmp(&r2->saidx.dst.sa, odst, 0))
693 continue;
694
695 goto found;
696 }
697 }
698 sp = NULL;
699found:
700 if (sp) {
701 sp->lastused = time_second;
702 SP_ADDREF(sp);
703 }
cb753a0e 704 crit_exit();
984263bc
MD
705done:
706 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 707 kprintf("DP key_gettunnel return SP:%p (ID=%u) refcnt %u\n",
984263bc
MD
708 sp, sp ? sp->id : 0, sp ? sp->refcnt : 0));
709 return sp;
710}
711
712/*
713 * allocating an SA entry for an *OUTBOUND* packet.
714 * checking each request entries in SP, and acquire an SA if need.
715 * OUT: 0: there are valid requests.
716 * ENOENT: policy may be valid, but SA with REQUIRE is on acquiring.
717 */
718int
719key_checkrequest(struct ipsecrequest *isr, const struct secasindex *saidx)
720{
721 u_int level;
722 int error;
723
724 KASSERT(isr != NULL, ("key_checkrequest: null isr"));
725 KASSERT(saidx != NULL, ("key_checkrequest: null saidx"));
726 KASSERT(saidx->mode == IPSEC_MODE_TRANSPORT ||
727 saidx->mode == IPSEC_MODE_TUNNEL,
728 ("key_checkrequest: unexpected policy %u", saidx->mode));
729
730 /* get current level */
731 level = ipsec_get_reqlevel(isr);
732
733 /*
734 * XXX guard against protocol callbacks from the crypto
735 * thread as they reference ipsecrequest.sav which we
736 * temporarily null out below. Need to rethink how we
737 * handle bundled SA's in the callback thread.
738 */
984263bc
MD
739#if 0
740 /*
741 * We do allocate new SA only if the state of SA in the holder is
742 * SADB_SASTATE_DEAD. The SA for outbound must be the oldest.
743 */
744 if (isr->sav != NULL) {
745 if (isr->sav->sah == NULL)
746 panic("key_checkrequest: sah is null.\n");
747 if (isr->sav == (struct secasvar *)LIST_FIRST(
748 &isr->sav->sah->savtree[SADB_SASTATE_DEAD])) {
749 KEY_FREESAV(&isr->sav);
750 isr->sav = NULL;
751 }
752 }
753#else
754 /*
755 * we free any SA stashed in the IPsec request because a different
756 * SA may be involved each time this request is checked, either
757 * because new SAs are being configured, or this request is
758 * associated with an unconnected datagram socket, or this request
759 * is associated with a system default policy.
760 *
761 * The operation may have negative impact to performance. We may
762 * want to check cached SA carefully, rather than picking new SA
763 * every time.
764 */
765 if (isr->sav != NULL) {
766 KEY_FREESAV(&isr->sav);
767 isr->sav = NULL;
768 }
769#endif
770
771 /*
772 * new SA allocation if no SA found.
773 * key_allocsa_policy should allocate the oldest SA available.
774 * See key_do_allocsa_policy(), and draft-jenkins-ipsec-rekeying-03.txt.
775 */
776 if (isr->sav == NULL)
777 isr->sav = key_allocsa_policy(saidx);
778
779 /* When there is SA. */
780 if (isr->sav != NULL) {
781 if (isr->sav->state != SADB_SASTATE_MATURE &&
782 isr->sav->state != SADB_SASTATE_DYING)
783 return EINVAL;
784 return 0;
785 }
786
787 /* there is no SA */
788 error = key_acquire(saidx, isr->sp);
789 if (error != 0) {
790 /* XXX What should I do ? */
791 ipseclog((LOG_DEBUG, "key_checkrequest: error %d returned "
792 "from key_acquire.\n", error));
793 return error;
794 }
795
796 if (level != IPSEC_LEVEL_REQUIRE) {
797 /* XXX sigh, the interface to this routine is botched */
798 KASSERT(isr->sav == NULL, ("key_checkrequest: unexpected SA"));
799 return 0;
800 } else {
801 return ENOENT;
802 }
803}
804
805/*
806 * allocating a SA for policy entry from SAD.
807 * NOTE: searching SAD of aliving state.
808 * OUT: NULL: not found.
809 * others: found and return the pointer.
810 */
811static struct secasvar *
812key_allocsa_policy(const struct secasindex *saidx)
813{
814 struct secashead *sah;
815 struct secasvar *sav;
816 u_int stateidx, state;
817
818 LIST_FOREACH(sah, &sahtree, chain) {
819 if (sah->state == SADB_SASTATE_DEAD)
820 continue;
821 if (key_cmpsaidx(&sah->saidx, saidx, CMP_MODE_REQID))
822 goto found;
823 }
824
825 return NULL;
826
827 found:
828
829 /* search valid state */
830 for (stateidx = 0;
831 stateidx < _ARRAYLEN(saorder_state_valid);
832 stateidx++) {
833
834 state = saorder_state_valid[stateidx];
835
836 sav = key_do_allocsa_policy(sah, state);
837 if (sav != NULL)
838 return sav;
839 }
840
841 return NULL;
842}
843
844/*
845 * searching SAD with direction, protocol, mode and state.
846 * called by key_allocsa_policy().
847 * OUT:
848 * NULL : not found
849 * others : found, pointer to a SA.
850 */
851static struct secasvar *
852key_do_allocsa_policy(struct secashead *sah, u_int state)
853{
cd52b1e6 854 struct secasvar *sav, *nextsav, *candidate = NULL, *d;
984263bc 855
cd52b1e6 856 LIST_FOREACH_MUTABLE(sav, &sah->savtree[state], chain, nextsav) {
984263bc
MD
857 /* sanity check */
858 KEY_CHKSASTATE(sav->state, state, "key_do_allocsa_policy");
859
860 /* initialize */
861 if (candidate == NULL) {
862 candidate = sav;
863 continue;
864 }
865
866 /* Which SA is the better ? */
867
868 /* sanity check 2 */
869 if (candidate->lft_c == NULL || sav->lft_c == NULL)
870 panic("key_do_allocsa_policy: "
871 "lifetime_current is NULL.\n");
872
873 /* What the best method is to compare ? */
874 if (key_prefered_oldsa) {
875 if (candidate->lft_c->sadb_lifetime_addtime >
876 sav->lft_c->sadb_lifetime_addtime) {
877 candidate = sav;
878 }
879 continue;
984263bc
MD
880 }
881
882 /* prefered new sa rather than old sa */
883 if (candidate->lft_c->sadb_lifetime_addtime <
884 sav->lft_c->sadb_lifetime_addtime) {
885 d = candidate;
886 candidate = sav;
887 } else
888 d = sav;
889
890 /*
891 * prepared to delete the SA when there is more
892 * suitable candidate and the lifetime of the SA is not
893 * permanent.
894 */
895 if (d->lft_c->sadb_lifetime_addtime != 0) {
896 struct mbuf *m, *result;
42974f86 897 u_int8_t satype;
984263bc
MD
898
899 key_sa_chgstate(d, SADB_SASTATE_DEAD);
900
901 KASSERT(d->refcnt > 0,
902 ("key_do_allocsa_policy: bogus ref count"));
42974f86
JH
903
904 satype = key_proto2satype(d->sah->saidx.proto);
905 if (satype == 0)
906 goto msgfail;
907
908 m = key_setsadbmsg(SADB_DELETE, 0, satype, 0, 0,
909 d->refcnt - 1);
984263bc
MD
910 if (!m)
911 goto msgfail;
912 result = m;
913
914 /* set sadb_address for saidx's. */
915 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
916 &d->sah->saidx.src.sa,
917 d->sah->saidx.src.sa.sa_len << 3,
918 IPSEC_ULPROTO_ANY);
919 if (!m)
920 goto msgfail;
921 m_cat(result, m);
922
923 /* set sadb_address for saidx's. */
924 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
f05c9239
JH
925 &d->sah->saidx.dst.sa,
926 d->sah->saidx.dst.sa.sa_len << 3,
984263bc
MD
927 IPSEC_ULPROTO_ANY);
928 if (!m)
929 goto msgfail;
930 m_cat(result, m);
931
932 /* create SA extension */
933 m = key_setsadbsa(d);
934 if (!m)
935 goto msgfail;
936 m_cat(result, m);
937
938 if (result->m_len < sizeof(struct sadb_msg)) {
939 result = m_pullup(result,
940 sizeof(struct sadb_msg));
941 if (result == NULL)
942 goto msgfail;
943 }
944
cd52b1e6 945 result->m_pkthdr.len = m_lengthm(result, NULL);
984263bc
MD
946 mtod(result, struct sadb_msg *)->sadb_msg_len =
947 PFKEY_UNIT64(result->m_pkthdr.len);
948
949 if (key_sendup_mbuf(NULL, result,
950 KEY_SENDUP_REGISTERED))
951 goto msgfail;
952 msgfail:
953 KEY_FREESAV(&d);
954 }
955 }
956
957 if (candidate) {
958 SA_ADDREF(candidate);
959 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 960 kprintf("DP allocsa_policy cause refcnt++:%d SA:%p\n",
984263bc
MD
961 candidate->refcnt, candidate));
962 }
963 return candidate;
964}
965
966/*
967 * allocating a usable SA entry for a *INBOUND* packet.
968 * Must call key_freesav() later.
969 * OUT: positive: pointer to a usable sav (i.e. MATURE or DYING state).
970 * NULL: not found, or error occured.
971 *
972 * In the comparison, no source address is used--for RFC2401 conformance.
973 * To quote, from section 4.1:
974 * A security association is uniquely identified by a triple consisting
975 * of a Security Parameter Index (SPI), an IP Destination Address, and a
976 * security protocol (AH or ESP) identifier.
977 * Note that, however, we do need to keep source address in IPsec SA.
978 * IKE specification and PF_KEY specification do assume that we
979 * keep source address in IPsec SA. We see a tricky situation here.
980 */
981struct secasvar *
982key_allocsa(
983 union sockaddr_union *dst,
984 u_int proto,
985 u_int32_t spi,
986 const char* where, int tag)
987{
988 struct secashead *sah;
989 struct secasvar *sav;
990 u_int stateidx, state;
cb753a0e 991
984263bc
MD
992
993 KASSERT(dst != NULL, ("key_allocsa: null dst address"));
994
995 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 996 kprintf("DP key_allocsa from %s:%u\n", where, tag));
984263bc
MD
997
998 /*
999 * searching SAD.
1000 * XXX: to be checked internal IP header somewhere. Also when
1001 * IPsec tunnel packet is received. But ESP tunnel mode is
1002 * encrypted so we can't check internal IP header.
1003 */
cb753a0e 1004 crit_enter();
984263bc
MD
1005 LIST_FOREACH(sah, &sahtree, chain) {
1006 /* search valid state */
1007 for (stateidx = 0;
1008 stateidx < _ARRAYLEN(saorder_state_valid);
1009 stateidx++) {
1010 state = saorder_state_valid[stateidx];
1011 LIST_FOREACH(sav, &sah->savtree[state], chain) {
1012 /* sanity check */
1013 KEY_CHKSASTATE(sav->state, state, "key_allocsav");
1014 /* do not return entries w/ unusable state */
1015 if (sav->state != SADB_SASTATE_MATURE &&
1016 sav->state != SADB_SASTATE_DYING)
1017 continue;
1018 if (proto != sav->sah->saidx.proto)
1019 continue;
1020 if (spi != sav->spi)
1021 continue;
1022#if 0 /* don't check src */
1023 /* check src address */
1024 if (key_sockaddrcmp(&src->sa, &sav->sah->saidx.src.sa, 0) != 0)
1025 continue;
1026#endif
1027 /* check dst address */
1028 if (key_sockaddrcmp(&dst->sa, &sav->sah->saidx.dst.sa, 0) != 0)
1029 continue;
1030 SA_ADDREF(sav);
1031 goto done;
1032 }
1033 }
1034 }
1035 sav = NULL;
1036done:
cb753a0e 1037 crit_exit();
984263bc
MD
1038
1039 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1040 kprintf("DP key_allocsa return SA:%p; refcnt %u\n",
984263bc
MD
1041 sav, sav ? sav->refcnt : 0));
1042 return sav;
1043}
1044
1045/*
1046 * Must be called after calling key_allocsp().
1047 * For both the packet without socket and key_freeso().
1048 */
1049void
1050_key_freesp(struct secpolicy **spp, const char* where, int tag)
1051{
1052 struct secpolicy *sp = *spp;
1053
1054 KASSERT(sp != NULL, ("key_freesp: null sp"));
1055
1056 SP_DELREF(sp);
1057
1058 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1059 kprintf("DP key_freesp SP:%p (ID=%u) from %s:%u; refcnt now %u\n",
984263bc
MD
1060 sp, sp->id, where, tag, sp->refcnt));
1061
1062 if (sp->refcnt == 0) {
1063 *spp = NULL;
1064 key_delsp(sp);
1065 }
1066}
1067
1068/*
1069 * Must be called after calling key_allocsp().
1070 * For the packet with socket.
1071 */
1072void
1073key_freeso(struct socket *so)
1074{
1075 /* sanity check */
1076 KASSERT(so != NULL, ("key_freeso: null so"));
1077
1078 switch (so->so_proto->pr_domain->dom_family) {
1079#ifdef INET
1080 case PF_INET:
1081 {
ed894f8c 1082 struct inpcb *pcb = so->so_pcb;
984263bc
MD
1083
1084 /* Does it have a PCB ? */
1085 if (pcb == NULL)
1086 return;
1087 key_freesp_so(&pcb->inp_sp->sp_in);
1088 key_freesp_so(&pcb->inp_sp->sp_out);
1089 }
1090 break;
1091#endif
1092#ifdef INET6
1093 case PF_INET6:
1094 {
1095#ifdef HAVE_NRL_INPCB
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#else
ed894f8c 1104 struct in6pcb *pcb = so->so_pcb;
984263bc
MD
1105
1106 /* Does it have a PCB ? */
1107 if (pcb == NULL)
1108 return;
1109 key_freesp_so(&pcb->in6p_sp->sp_in);
1110 key_freesp_so(&pcb->in6p_sp->sp_out);
1111#endif
1112 }
1113 break;
1114#endif /* INET6 */
1115 default:
1116 ipseclog((LOG_DEBUG, "key_freeso: unknown address family=%d.\n",
1117 so->so_proto->pr_domain->dom_family));
1118 return;
1119 }
1120}
1121
1122static void
1123key_freesp_so(struct secpolicy **sp)
1124{
1125 KASSERT(sp != NULL && *sp != NULL, ("key_freesp_so: null sp"));
1126
1127 if ((*sp)->policy == IPSEC_POLICY_ENTRUST ||
1128 (*sp)->policy == IPSEC_POLICY_BYPASS)
1129 return;
1130
1131 KASSERT((*sp)->policy == IPSEC_POLICY_IPSEC,
1132 ("key_freesp_so: invalid policy %u", (*sp)->policy));
1133 KEY_FREESP(sp);
1134}
1135
1136/*
1137 * Must be called after calling key_allocsa().
1138 * This function is called by key_freesp() to free some SA allocated
1139 * for a policy.
1140 */
1141void
1142key_freesav(struct secasvar **psav, const char* where, int tag)
1143{
1144 struct secasvar *sav = *psav;
1145
1146 KASSERT(sav != NULL, ("key_freesav: null sav"));
1147
1148 SA_DELREF(sav);
1149
1150 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1151 kprintf("DP key_freesav SA:%p (SPI %u) from %s:%u; refcnt now %u\n",
984263bc
MD
1152 sav, ntohl(sav->spi), where, tag, sav->refcnt));
1153
1154 if (sav->refcnt == 0) {
1155 *psav = NULL;
1156 key_delsav(sav);
1157 }
1158}
1159
1160/* %%% SPD management */
1161/*
1162 * free security policy entry.
1163 */
1164static void
1165key_delsp(struct secpolicy *sp)
1166{
cb753a0e 1167
984263bc
MD
1168
1169 KASSERT(sp != NULL, ("key_delsp: null sp"));
1170
1171 sp->state = IPSEC_SPSTATE_DEAD;
1172
1173 KASSERT(sp->refcnt == 0,
1174 ("key_delsp: SP with references deleted (refcnt %u)",
1175 sp->refcnt));
1176
cb753a0e 1177 crit_enter();
984263bc
MD
1178 /* remove from SP index */
1179 if (__LIST_CHAINED(sp))
1180 LIST_REMOVE(sp, chain);
1181
1182 {
1183 struct ipsecrequest *isr = sp->req, *nextisr;
1184
1185 while (isr != NULL) {
1186 if (isr->sav != NULL) {
1187 KEY_FREESAV(&isr->sav);
1188 isr->sav = NULL;
1189 }
1190
1191 nextisr = isr->next;
1192 KFREE(isr);
1193 isr = nextisr;
1194 }
1195 }
1196
1197 KFREE(sp);
1198
cb753a0e 1199 crit_exit();
984263bc
MD
1200}
1201
1202/*
1203 * search SPD
1204 * OUT: NULL : not found
1205 * others : found, pointer to a SP.
1206 */
1207static struct secpolicy *
1208key_getsp(struct secpolicyindex *spidx)
1209{
1210 struct secpolicy *sp;
1211
1212 KASSERT(spidx != NULL, ("key_getsp: null spidx"));
1213
1214 LIST_FOREACH(sp, &sptree[spidx->dir], chain) {
1215 if (sp->state == IPSEC_SPSTATE_DEAD)
1216 continue;
1217 if (key_cmpspidx_exactly(spidx, &sp->spidx)) {
1218 SP_ADDREF(sp);
1219 return sp;
1220 }
1221 }
1222
1223 return NULL;
1224}
1225
1226/*
1227 * get SP by index.
1228 * OUT: NULL : not found
1229 * others : found, pointer to a SP.
1230 */
1231static struct secpolicy *
1232key_getspbyid(u_int32_t id)
1233{
1234 struct secpolicy *sp;
1235
1236 LIST_FOREACH(sp, &sptree[IPSEC_DIR_INBOUND], chain) {
1237 if (sp->state == IPSEC_SPSTATE_DEAD)
1238 continue;
1239 if (sp->id == id) {
1240 SP_ADDREF(sp);
1241 return sp;
1242 }
1243 }
1244
1245 LIST_FOREACH(sp, &sptree[IPSEC_DIR_OUTBOUND], chain) {
1246 if (sp->state == IPSEC_SPSTATE_DEAD)
1247 continue;
1248 if (sp->id == id) {
1249 SP_ADDREF(sp);
1250 return sp;
1251 }
1252 }
1253
1254 return NULL;
1255}
1256
1257struct secpolicy *
1258key_newsp(const char* where, int tag)
1259{
1260 struct secpolicy *newsp = NULL;
1261
efda3bd0 1262 newsp = kmalloc(sizeof(struct secpolicy), M_SECA,
062eab50 1263 M_INTWAIT | M_ZERO | M_NULLOK);
984263bc
MD
1264 if (newsp) {
1265 newsp->refcnt = 1;
1266 newsp->req = NULL;
1267 }
1268
1269 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 1270 kprintf("DP key_newsp from %s:%u return SP:%p\n",
984263bc
MD
1271 where, tag, newsp));
1272 return newsp;
1273}
1274
1275/*
1276 * create secpolicy structure from sadb_x_policy structure.
1277 * NOTE: `state', `secpolicyindex' in secpolicy structure are not set,
1278 * so must be set properly later.
1279 */
1280struct secpolicy *
9855a82b 1281key_msg2sp(struct sadb_x_policy *xpl0, size_t len, int *error)
984263bc
MD
1282{
1283 struct secpolicy *newsp;
1284
1285 /* sanity check */
1286 if (xpl0 == NULL)
1287 panic("key_msg2sp: NULL pointer was passed.\n");
1288 if (len < sizeof(*xpl0))
1289 panic("key_msg2sp: invalid length.\n");
1290 if (len != PFKEY_EXTLEN(xpl0)) {
1291 ipseclog((LOG_DEBUG, "key_msg2sp: Invalid msg length.\n"));
1292 *error = EINVAL;
1293 return NULL;
1294 }
1295
1296 if ((newsp = KEY_NEWSP()) == NULL) {
1297 *error = ENOBUFS;
1298 return NULL;
1299 }
1300
1301 newsp->spidx.dir = xpl0->sadb_x_policy_dir;
1302 newsp->policy = xpl0->sadb_x_policy_type;
1303
1304 /* check policy */
1305 switch (xpl0->sadb_x_policy_type) {
1306 case IPSEC_POLICY_DISCARD:
1307 case IPSEC_POLICY_NONE:
1308 case IPSEC_POLICY_ENTRUST:
1309 case IPSEC_POLICY_BYPASS:
1310 newsp->req = NULL;
1311 break;
1312
1313 case IPSEC_POLICY_IPSEC:
1314 {
1315 int tlen;
1316 struct sadb_x_ipsecrequest *xisr;
1317 struct ipsecrequest **p_isr = &newsp->req;
1318
1319 /* validity check */
1320 if (PFKEY_EXTLEN(xpl0) < sizeof(*xpl0)) {
1321 ipseclog((LOG_DEBUG,
1322 "key_msg2sp: Invalid msg length.\n"));
1323 KEY_FREESP(&newsp);
1324 *error = EINVAL;
1325 return NULL;
1326 }
1327
1328 tlen = PFKEY_EXTLEN(xpl0) - sizeof(*xpl0);
1329 xisr = (struct sadb_x_ipsecrequest *)(xpl0 + 1);
1330
1331 while (tlen > 0) {
1332 /* length check */
1333 if (xisr->sadb_x_ipsecrequest_len < sizeof(*xisr)) {
1334 ipseclog((LOG_DEBUG, "key_msg2sp: "
1335 "invalid ipsecrequest length.\n"));
1336 KEY_FREESP(&newsp);
1337 *error = EINVAL;
1338 return NULL;
1339 }
1340
1341 /* allocate request buffer */
1342 KMALLOC(*p_isr, struct ipsecrequest *, sizeof(**p_isr));
1343 if ((*p_isr) == NULL) {
1344 ipseclog((LOG_DEBUG,
1345 "key_msg2sp: No more memory.\n"));
1346 KEY_FREESP(&newsp);
1347 *error = ENOBUFS;
1348 return NULL;
1349 }
1350 bzero(*p_isr, sizeof(**p_isr));
1351
1352 /* set values */
1353 (*p_isr)->next = NULL;
1354
1355 switch (xisr->sadb_x_ipsecrequest_proto) {
1356 case IPPROTO_ESP:
1357 case IPPROTO_AH:
1358 case IPPROTO_IPCOMP:
1359 break;
1360 default:
1361 ipseclog((LOG_DEBUG,
1362 "key_msg2sp: invalid proto type=%u\n",
1363 xisr->sadb_x_ipsecrequest_proto));
1364 KEY_FREESP(&newsp);
1365 *error = EPROTONOSUPPORT;
1366 return NULL;
1367 }
1368 (*p_isr)->saidx.proto = xisr->sadb_x_ipsecrequest_proto;
1369
1370 switch (xisr->sadb_x_ipsecrequest_mode) {
1371 case IPSEC_MODE_TRANSPORT:
1372 case IPSEC_MODE_TUNNEL:
1373 break;
1374 case IPSEC_MODE_ANY:
1375 default:
1376 ipseclog((LOG_DEBUG,
1377 "key_msg2sp: invalid mode=%u\n",
1378 xisr->sadb_x_ipsecrequest_mode));
1379 KEY_FREESP(&newsp);
1380 *error = EINVAL;
1381 return NULL;
1382 }
1383 (*p_isr)->saidx.mode = xisr->sadb_x_ipsecrequest_mode;
1384
1385 switch (xisr->sadb_x_ipsecrequest_level) {
1386 case IPSEC_LEVEL_DEFAULT:
1387 case IPSEC_LEVEL_USE:
1388 case IPSEC_LEVEL_REQUIRE:
1389 break;
1390 case IPSEC_LEVEL_UNIQUE:
1391 /* validity check */
1392 /*
1393 * If range violation of reqid, kernel will
1394 * update it, don't refuse it.
1395 */
1396 if (xisr->sadb_x_ipsecrequest_reqid
1397 > IPSEC_MANUAL_REQID_MAX) {
1398 ipseclog((LOG_DEBUG,
1399 "key_msg2sp: reqid=%d range "
1400 "violation, updated by kernel.\n",
1401 xisr->sadb_x_ipsecrequest_reqid));
1402 xisr->sadb_x_ipsecrequest_reqid = 0;
1403 }
1404
1405 /* allocate new reqid id if reqid is zero. */
1406 if (xisr->sadb_x_ipsecrequest_reqid == 0) {
1407 u_int32_t reqid;
1408 if ((reqid = key_newreqid()) == 0) {
1409 KEY_FREESP(&newsp);
1410 *error = ENOBUFS;
1411 return NULL;
1412 }
1413 (*p_isr)->saidx.reqid = reqid;
1414 xisr->sadb_x_ipsecrequest_reqid = reqid;
1415 } else {
1416 /* set it for manual keying. */
1417 (*p_isr)->saidx.reqid =
1418 xisr->sadb_x_ipsecrequest_reqid;
1419 }
1420 break;
1421
1422 default:
1423 ipseclog((LOG_DEBUG, "key_msg2sp: invalid level=%u\n",
1424 xisr->sadb_x_ipsecrequest_level));
1425 KEY_FREESP(&newsp);
1426 *error = EINVAL;
1427 return NULL;
1428 }
1429 (*p_isr)->level = xisr->sadb_x_ipsecrequest_level;
1430
1431 /* set IP addresses if there */
1432 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) {
1433 struct sockaddr *paddr;
1434
1435 paddr = (struct sockaddr *)(xisr + 1);
1436
1437 /* validity check */
1438 if (paddr->sa_len
1439 > sizeof((*p_isr)->saidx.src)) {
1440 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1441 "address length.\n"));
1442 KEY_FREESP(&newsp);
1443 *error = EINVAL;
1444 return NULL;
1445 }
1446 bcopy(paddr, &(*p_isr)->saidx.src,
1447 paddr->sa_len);
1448
1449 paddr = (struct sockaddr *)((caddr_t)paddr
1450 + paddr->sa_len);
1451
1452 /* validity check */
1453 if (paddr->sa_len
1454 > sizeof((*p_isr)->saidx.dst)) {
1455 ipseclog((LOG_DEBUG, "key_msg2sp: invalid request "
1456 "address length.\n"));
1457 KEY_FREESP(&newsp);
1458 *error = EINVAL;
1459 return NULL;
1460 }
1461 bcopy(paddr, &(*p_isr)->saidx.dst,
1462 paddr->sa_len);
1463 }
1464
1465 (*p_isr)->sav = NULL;
1466 (*p_isr)->sp = newsp;
1467
1468 /* initialization for the next. */
1469 p_isr = &(*p_isr)->next;
1470 tlen -= xisr->sadb_x_ipsecrequest_len;
1471
1472 /* validity check */
1473 if (tlen < 0) {
1474 ipseclog((LOG_DEBUG, "key_msg2sp: becoming tlen < 0.\n"));
1475 KEY_FREESP(&newsp);
1476 *error = EINVAL;
1477 return NULL;
1478 }
1479
1480 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xisr
1481 + xisr->sadb_x_ipsecrequest_len);
1482 }
1483 }
1484 break;
1485 default:
1486 ipseclog((LOG_DEBUG, "key_msg2sp: invalid policy type.\n"));
1487 KEY_FREESP(&newsp);
1488 *error = EINVAL;
1489 return NULL;
1490 }
1491
1492 *error = 0;
1493 return newsp;
1494}
1495
1496static u_int32_t
9855a82b 1497key_newreqid(void)
984263bc
MD
1498{
1499 static u_int32_t auto_reqid = IPSEC_MANUAL_REQID_MAX + 1;
1500
1501 auto_reqid = (auto_reqid == ~0
1502 ? IPSEC_MANUAL_REQID_MAX + 1 : auto_reqid + 1);
1503
1504 /* XXX should be unique check */
1505
1506 return auto_reqid;
1507}
1508
1509/*
1510 * copy secpolicy struct to sadb_x_policy structure indicated.
1511 */
1512struct mbuf *
9855a82b 1513key_sp2msg(struct secpolicy *sp)
984263bc
MD
1514{
1515 struct sadb_x_policy *xpl;
1516 int tlen;
1517 caddr_t p;
1518 struct mbuf *m;
1519
1520 /* sanity check. */
1521 if (sp == NULL)
1522 panic("key_sp2msg: NULL pointer was passed.\n");
1523
1524 tlen = key_getspreqmsglen(sp);
1525
1526 m = key_alloc_mbuf(tlen);
1527 if (!m || m->m_next) { /*XXX*/
1528 if (m)
1529 m_freem(m);
1530 return NULL;
1531 }
1532
1533 m->m_len = tlen;
1534 m->m_next = NULL;
1535 xpl = mtod(m, struct sadb_x_policy *);
1536 bzero(xpl, tlen);
1537
1538 xpl->sadb_x_policy_len = PFKEY_UNIT64(tlen);
1539 xpl->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
1540 xpl->sadb_x_policy_type = sp->policy;
1541 xpl->sadb_x_policy_dir = sp->spidx.dir;
1542 xpl->sadb_x_policy_id = sp->id;
1543 p = (caddr_t)xpl + sizeof(*xpl);
1544
1545 /* if is the policy for ipsec ? */
1546 if (sp->policy == IPSEC_POLICY_IPSEC) {
1547 struct sadb_x_ipsecrequest *xisr;
1548 struct ipsecrequest *isr;
1549
1550 for (isr = sp->req; isr != NULL; isr = isr->next) {
1551
1552 xisr = (struct sadb_x_ipsecrequest *)p;
1553
1554 xisr->sadb_x_ipsecrequest_proto = isr->saidx.proto;
1555 xisr->sadb_x_ipsecrequest_mode = isr->saidx.mode;
1556 xisr->sadb_x_ipsecrequest_level = isr->level;
1557 xisr->sadb_x_ipsecrequest_reqid = isr->saidx.reqid;
1558
1559 p += sizeof(*xisr);
1560 bcopy(&isr->saidx.src, p, isr->saidx.src.sa.sa_len);
1561 p += isr->saidx.src.sa.sa_len;
1562 bcopy(&isr->saidx.dst, p, isr->saidx.dst.sa.sa_len);
1563 p += isr->saidx.src.sa.sa_len;
1564
1565 xisr->sadb_x_ipsecrequest_len =
1566 PFKEY_ALIGN8(sizeof(*xisr)
1567 + isr->saidx.src.sa.sa_len
1568 + isr->saidx.dst.sa.sa_len);
1569 }
1570 }
1571
1572 return m;
1573}
1574
1575/* m will not be freed nor modified */
1576static struct mbuf *
984263bc
MD
1577key_gather_mbuf(struct mbuf *m, const struct sadb_msghdr *mhp,
1578 int ndeep, int nitem, ...)
984263bc 1579{
e2565a42 1580 __va_list ap;
984263bc
MD
1581 int idx;
1582 int i;
1583 struct mbuf *result = NULL, *n;
1584 int len;
1585
1586 if (m == NULL || mhp == NULL)
1587 panic("null pointer passed to key_gather");
1588
e2565a42 1589 __va_start(ap, nitem);
984263bc 1590 for (i = 0; i < nitem; i++) {
e2565a42 1591 idx = __va_arg(ap, int);
984263bc
MD
1592 if (idx < 0 || idx > SADB_EXT_MAX)
1593 goto fail;
1594 /* don't attempt to pull empty extension */
1595 if (idx == SADB_EXT_RESERVED && mhp->msg == NULL)
1596 continue;
1597 if (idx != SADB_EXT_RESERVED &&
1598 (mhp->ext[idx] == NULL || mhp->extlen[idx] == 0))
1599 continue;
1600
1601 if (idx == SADB_EXT_RESERVED) {
1602 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
1603#ifdef DIAGNOSTIC
1604 if (len > MHLEN)
1605 panic("assumption failed");
1606#endif
74f1caca 1607 MGETHDR(n, MB_DONTWAIT, MT_DATA);
984263bc
MD
1608 if (!n)
1609 goto fail;
1610 n->m_len = len;
1611 n->m_next = NULL;
1612 m_copydata(m, 0, sizeof(struct sadb_msg),
1613 mtod(n, caddr_t));
1614 } else if (i < ndeep) {
1615 len = mhp->extlen[idx];
1616 n = key_alloc_mbuf(len);
1617 if (!n || n->m_next) { /*XXX*/
1618 if (n)
1619 m_freem(n);
1620 goto fail;
1621 }
1622 m_copydata(m, mhp->extoff[idx], mhp->extlen[idx],
1623 mtod(n, caddr_t));
1624 } else {
1625 n = m_copym(m, mhp->extoff[idx], mhp->extlen[idx],
74f1caca 1626 MB_DONTWAIT);
984263bc
MD
1627 }
1628 if (n == NULL)
1629 goto fail;
1630
1631 if (result)
1632 m_cat(result, n);
1633 else
1634 result = n;
1635 }
e2565a42 1636 __va_end(ap);
984263bc 1637
cd52b1e6
JH
1638 if (result->m_flags & M_PKTHDR)
1639 result->m_pkthdr.len = m_lengthm(result, NULL);
984263bc
MD
1640
1641 return result;
1642
1643fail:
1644 m_freem(result);
1645 return NULL;
1646}
1647
1648/*
1649 * SADB_X_SPDADD, SADB_X_SPDSETIDX or SADB_X_SPDUPDATE processing
1650 * add an entry to SP database, when received
1651 * <base, address(SD), (lifetime(H),) policy>
1652 * from the user(?).
1653 * Adding to SP database,
1654 * and send
1655 * <base, address(SD), (lifetime(H),) policy>
1656 * to the socket which was send.
1657 *
1658 * SPDADD set a unique policy entry.
1659 * SPDSETIDX like SPDADD without a part of policy requests.
1660 * SPDUPDATE replace a unique policy entry.
1661 *
1662 * m will always be freed.
1663 */
1664static int
9855a82b 1665key_spdadd(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
984263bc
MD
1666{
1667 struct sadb_address *src0, *dst0;
1668 struct sadb_x_policy *xpl0, *xpl;
1669 struct sadb_lifetime *lft = NULL;
1670 struct secpolicyindex spidx;
1671 struct secpolicy *newsp;
cd52b1e6 1672 struct sockaddr *saddr, *daddr;
984263bc
MD
1673 int error;
1674
1675 /* sanity check */
1676 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1677 panic("key_spdadd: NULL pointer is passed.\n");
1678
1679 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1680 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1681 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1682 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1683 return key_senderror(so, m, EINVAL);
1684 }
1685 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1686 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1687 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1688 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1689 return key_senderror(so, m, EINVAL);
1690 }
1691 if (mhp->ext[SADB_EXT_LIFETIME_HARD] != NULL) {
1692 if (mhp->extlen[SADB_EXT_LIFETIME_HARD]
1693 < sizeof(struct sadb_lifetime)) {
1694 ipseclog((LOG_DEBUG, "key_spdadd: invalid message is passed.\n"));
1695 return key_senderror(so, m, EINVAL);
1696 }
1697 lft = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
1698 }
1699
1700 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1701 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1702 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1703
1704 /* make secindex */
1705 /* XXX boundary check against sa_len */
1706 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1707 src0 + 1,
1708 dst0 + 1,
1709 src0->sadb_address_prefixlen,
1710 dst0->sadb_address_prefixlen,
1711 src0->sadb_address_proto,
1712 &spidx);
1713
1714 /* checking the direciton. */
1715 switch (xpl0->sadb_x_policy_dir) {
1716 case IPSEC_DIR_INBOUND:
1717 case IPSEC_DIR_OUTBOUND:
1718 break;
1719 default:
1720 ipseclog((LOG_DEBUG, "key_spdadd: Invalid SP direction.\n"));
1721 mhp->msg->sadb_msg_errno = EINVAL;
1722 return 0;
1723 }
1724
1725 /* check policy */
1726 /* key_spdadd() accepts DISCARD, NONE and IPSEC. */
1727 if (xpl0->sadb_x_policy_type == IPSEC_POLICY_ENTRUST
1728 || xpl0->sadb_x_policy_type == IPSEC_POLICY_BYPASS) {
1729 ipseclog((LOG_DEBUG, "key_spdadd: Invalid policy type.\n"));
1730 return key_senderror(so, m, EINVAL);
1731 }
1732
1733 /* policy requests are mandatory when action is ipsec. */
1734 if (mhp->msg->sadb_msg_type != SADB_X_SPDSETIDX
1735 && xpl0->sadb_x_policy_type == IPSEC_POLICY_IPSEC
1736 && mhp->extlen[SADB_X_EXT_POLICY] <= sizeof(*xpl0)) {
1737 ipseclog((LOG_DEBUG, "key_spdadd: some policy requests part required.\n"));
1738 return key_senderror(so, m, EINVAL);
1739 }
1740
1741 /*
1742 * checking there is SP already or not.
1743 * SPDUPDATE doesn't depend on whether there is a SP or not.
1744 * If the type is either SPDADD or SPDSETIDX AND a SP is found,
1745 * then error.
1746 */
1747 newsp = key_getsp(&spidx);
1748 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1749 if (newsp) {
1750 newsp->state = IPSEC_SPSTATE_DEAD;
1751 KEY_FREESP(&newsp);
1752 }
1753 } else {
1754 if (newsp != NULL) {
1755 KEY_FREESP(&newsp);
1756 ipseclog((LOG_DEBUG, "key_spdadd: a SP entry exists already.\n"));
1757 return key_senderror(so, m, EEXIST);
1758 }
1759 }
1760
1761 /* allocation new SP entry */
1762 if ((newsp = key_msg2sp(xpl0, PFKEY_EXTLEN(xpl0), &error)) == NULL) {
1763 return key_senderror(so, m, error);
1764 }
1765
1766 if ((newsp->id = key_getnewspid()) == 0) {
1767 KFREE(newsp);
1768 return key_senderror(so, m, ENOBUFS);
1769 }
1770
1771 /* XXX boundary check against sa_len */
1772 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1773 src0 + 1,
1774 dst0 + 1,
1775 src0->sadb_address_prefixlen,
1776 dst0->sadb_address_prefixlen,
1777 src0->sadb_address_proto,
1778 &newsp->spidx);
1779
1780 /* sanity check on addr pair */
cd52b1e6
JH
1781 saddr = (struct sockaddr *)(src0 + 1);
1782 daddr = (struct sockaddr *)(dst0 + 1);
1783 if (saddr->sa_family != daddr->sa_family) {
984263bc
MD
1784 KFREE(newsp);
1785 return key_senderror(so, m, EINVAL);
1786 }
cd52b1e6 1787 if (saddr->sa_len != daddr->sa_len) {
984263bc
MD
1788 KFREE(newsp);
1789 return key_senderror(so, m, EINVAL);
1790 }
1791#if 1
1792 if (newsp->req && newsp->req->saidx.src.sa.sa_family) {
cd52b1e6 1793 if (saddr->sa_family != newsp->req->saidx.src.sa.sa_family) {
984263bc
MD
1794 KFREE(newsp);
1795 return key_senderror(so, m, EINVAL);
1796 }
1797 }
1798 if (newsp->req && newsp->req->saidx.dst.sa.sa_family) {
cd52b1e6 1799 if (daddr->sa_family != newsp->req->saidx.dst.sa.sa_family) {
984263bc
MD
1800 KFREE(newsp);
1801 return key_senderror(so, m, EINVAL);
1802 }
1803 }
1804#endif
1805
1806 newsp->created = time_second;
1807 newsp->lastused = newsp->created;
1808 newsp->lifetime = lft ? lft->sadb_lifetime_addtime : 0;
1809 newsp->validtime = lft ? lft->sadb_lifetime_usetime : 0;
1810
1811 newsp->refcnt = 1; /* do not reclaim until I say I do */
1812 newsp->state = IPSEC_SPSTATE_ALIVE;
1813 LIST_INSERT_TAIL(&sptree[newsp->spidx.dir], newsp, secpolicy, chain);
1814
1815 /* delete the entry in spacqtree */
1816 if (mhp->msg->sadb_msg_type == SADB_X_SPDUPDATE) {
1817 struct secspacq *spacq;
1818 if ((spacq = key_getspacq(&spidx)) != NULL) {
1819 /* reset counter in order to deletion by timehandler. */
1820 spacq->created = time_second;
1821 spacq->count = 0;
1822 }
1823 }
1824
1825 {
1826 struct mbuf *n, *mpolicy;
1827 struct sadb_msg *newmsg;
1828 int off;
1829
1830 /* create new sadb_msg to reply. */
1831 if (lft) {
1832 n = key_gather_mbuf(m, mhp, 2, 5, SADB_EXT_RESERVED,
1833 SADB_X_EXT_POLICY, SADB_EXT_LIFETIME_HARD,
1834 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1835 } else {
1836 n = key_gather_mbuf(m, mhp, 2, 4, SADB_EXT_RESERVED,
1837 SADB_X_EXT_POLICY,
1838 SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1839 }
1840 if (!n)
1841 return key_senderror(so, m, ENOBUFS);
1842
1843 if (n->m_len < sizeof(*newmsg)) {
1844 n = m_pullup(n, sizeof(*newmsg));
1845 if (!n)
1846 return key_senderror(so, m, ENOBUFS);
1847 }
1848 newmsg = mtod(n, struct sadb_msg *);
1849 newmsg->sadb_msg_errno = 0;
1850 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1851
1852 off = 0;
1853 mpolicy = m_pulldown(n, PFKEY_ALIGN8(sizeof(struct sadb_msg)),
1854 sizeof(*xpl), &off);
1855 if (mpolicy == NULL) {
1856 /* n is already freed */
1857 return key_senderror(so, m, ENOBUFS);
1858 }
1859 xpl = (struct sadb_x_policy *)(mtod(mpolicy, caddr_t) + off);
1860 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) {
1861 m_freem(n);
1862 return key_senderror(so, m, EINVAL);
1863 }
1864 xpl->sadb_x_policy_id = newsp->id;
1865
1866 m_freem(m);
1867 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1868 }
1869}
1870
1871/*
1872 * get new policy id.
1873 * OUT:
1874 * 0: failure.
1875 * others: success.
1876 */
1877static u_int32_t
9855a82b 1878key_getnewspid(void)
984263bc
MD
1879{
1880 u_int32_t newid = 0;
1881 int count = key_spi_trycnt; /* XXX */
1882 struct secpolicy *sp;
1883
1884 /* when requesting to allocate spi ranged */
1885 while (count--) {
1886 newid = (policy_id = (policy_id == ~0 ? 1 : policy_id + 1));
1887
1888 if ((sp = key_getspbyid(newid)) == NULL)
1889 break;
1890
1891 KEY_FREESP(&sp);
1892 }
1893
1894 if (count == 0 || newid == 0) {
1895 ipseclog((LOG_DEBUG, "key_getnewspid: to allocate policy id is failed.\n"));
1896 return 0;
1897 }
1898
1899 return newid;
1900}
1901
1902/*
1903 * SADB_SPDDELETE processing
1904 * receive
1905 * <base, address(SD), policy(*)>
1906 * from the user(?), and set SADB_SASTATE_DEAD,
1907 * and send,
1908 * <base, address(SD), policy(*)>
1909 * to the ikmpd.
1910 * policy(*) including direction of policy.
1911 *
1912 * m will always be freed.
1913 */
1914static int
9855a82b 1915key_spddelete(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
984263bc
MD
1916{
1917 struct sadb_address *src0, *dst0;
1918 struct sadb_x_policy *xpl0;
1919 struct secpolicyindex spidx;
1920 struct secpolicy *sp;
1921
1922 /* sanity check */
1923 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
1924 panic("key_spddelete: NULL pointer is passed.\n");
1925
1926 if (mhp->ext[SADB_EXT_ADDRESS_SRC] == NULL ||
1927 mhp->ext[SADB_EXT_ADDRESS_DST] == NULL ||
1928 mhp->ext[SADB_X_EXT_POLICY] == NULL) {
1929 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1930 return key_senderror(so, m, EINVAL);
1931 }
1932 if (mhp->extlen[SADB_EXT_ADDRESS_SRC] < sizeof(struct sadb_address) ||
1933 mhp->extlen[SADB_EXT_ADDRESS_DST] < sizeof(struct sadb_address) ||
1934 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
1935 ipseclog((LOG_DEBUG, "key_spddelete: invalid message is passed.\n"));
1936 return key_senderror(so, m, EINVAL);
1937 }
1938
1939 src0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_SRC];
1940 dst0 = (struct sadb_address *)mhp->ext[SADB_EXT_ADDRESS_DST];
1941 xpl0 = (struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY];
1942
1943 /* make secindex */
1944 /* XXX boundary check against sa_len */
1945 KEY_SETSECSPIDX(xpl0->sadb_x_policy_dir,
1946 src0 + 1,
1947 dst0 + 1,
1948 src0->sadb_address_prefixlen,
1949 dst0->sadb_address_prefixlen,
1950 src0->sadb_address_proto,
1951 &spidx);
1952
1953 /* checking the direciton. */
1954 switch (xpl0->sadb_x_policy_dir) {
1955 case IPSEC_DIR_INBOUND:
1956 case IPSEC_DIR_OUTBOUND:
1957 break;
1958 default:
1959 ipseclog((LOG_DEBUG, "key_spddelete: Invalid SP direction.\n"));
1960 return key_senderror(so, m, EINVAL);
1961 }
1962
1963 /* Is there SP in SPD ? */
1964 if ((sp = key_getsp(&spidx)) == NULL) {
1965 ipseclog((LOG_DEBUG, "key_spddelete: no SP found.\n"));
1966 return key_senderror(so, m, EINVAL);
1967 }
1968
1969 /* save policy id to buffer to be returned. */
1970 xpl0->sadb_x_policy_id = sp->id;
1971
1972 sp->state = IPSEC_SPSTATE_DEAD;
1973 KEY_FREESP(&sp);
1974
1975 {
1976 struct mbuf *n;
1977 struct sadb_msg *newmsg;
1978
1979 /* create new sadb_msg to reply. */
1980 n = key_gather_mbuf(m, mhp, 1, 4, SADB_EXT_RESERVED,
1981 SADB_X_EXT_POLICY, SADB_EXT_ADDRESS_SRC, SADB_EXT_ADDRESS_DST);
1982 if (!n)
1983 return key_senderror(so, m, ENOBUFS);
1984
1985 newmsg = mtod(n, struct sadb_msg *);
1986 newmsg->sadb_msg_errno = 0;
1987 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
1988
1989 m_freem(m);
1990 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
1991 }
1992}
1993
1994/*
1995 * SADB_SPDDELETE2 processing
1996 * receive
1997 * <base, policy(*)>
1998 * from the user(?), and set SADB_SASTATE_DEAD,
1999 * and send,
2000 * <base, policy(*)>
2001 * to the ikmpd.
2002 * policy(*) including direction of policy.
2003 *
2004 * m will always be freed.
2005 */
2006static int
9855a82b
SW
2007key_spddelete2(struct socket *so, struct mbuf *m,
2008 const struct sadb_msghdr *mhp)
984263bc
MD
2009{
2010 u_int32_t id;
2011 struct secpolicy *sp;
2012
2013 /* sanity check */
2014 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2015 panic("key_spddelete2: NULL pointer is passed.\n");
2016
2017 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2018 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2019 ipseclog((LOG_DEBUG, "key_spddelete2: invalid message is passed.\n"));
2020 key_senderror(so, m, EINVAL);
2021 return 0;
2022 }
2023
2024 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2025
2026 /* Is there SP in SPD ? */
2027 if ((sp = key_getspbyid(id)) == NULL) {
2028 ipseclog((LOG_DEBUG, "key_spddelete2: no SP found id:%u.\n", id));
2029 key_senderror(so, m, EINVAL);
2030 }
2031
2032 sp->state = IPSEC_SPSTATE_DEAD;
2033 KEY_FREESP(&sp);
2034
2035 {
cd52b1e6 2036 struct mbuf *n;
984263bc
MD
2037 struct sadb_msg *newmsg;
2038 int off, len;
2039
2040 /* create new sadb_msg to reply. */
2041 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2042
2043 if (len > MCLBYTES)
2044 return key_senderror(so, m, ENOBUFS);
cd52b1e6 2045 n = m_getb(len, MB_DONTWAIT, MT_DATA, M_PKTHDR);
984263bc
MD
2046 if (!n)
2047 return key_senderror(so, m, ENOBUFS);
984263bc 2048 n->m_len = len;
984263bc 2049
cd52b1e6
JH
2050 m_copydata(m, 0, sizeof(struct sadb_msg), mtod(n, caddr_t));
2051 off = PFKEY_ALIGN8(sizeof(struct sadb_msg));
984263bc
MD
2052
2053#ifdef DIAGNOSTIC
2054 if (off != len)
2055 panic("length inconsistency in key_spddelete2");
2056#endif
2057
2058 n->m_next = m_copym(m, mhp->extoff[SADB_X_EXT_POLICY],
74f1caca 2059 mhp->extlen[SADB_X_EXT_POLICY], MB_DONTWAIT);
984263bc
MD
2060 if (!n->m_next) {
2061 m_freem(n);
2062 return key_senderror(so, m, ENOBUFS);
2063 }
cd52b1e6 2064 n->m_pkthdr.len = m_lengthm(n, NULL);
984263bc
MD
2065
2066 newmsg = mtod(n, struct sadb_msg *);
2067 newmsg->sadb_msg_errno = 0;
2068 newmsg->sadb_msg_len = PFKEY_UNIT64(n->m_pkthdr.len);
2069
2070 m_freem(m);
2071 return key_sendup_mbuf(so, n, KEY_SENDUP_ALL);
2072 }
2073}
2074
2075/*
2076 * SADB_X_GET processing
2077 * receive
2078 * <base, policy(*)>
2079 * from the user(?),
2080 * and send,
2081 * <base, address(SD), policy>
2082 * to the ikmpd.
2083 * policy(*) including direction of policy.
2084 *
2085 * m will always be freed.
2086 */
2087static int
9855a82b 2088key_spdget(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
984263bc
MD
2089{
2090 u_int32_t id;
2091 struct secpolicy *sp;
2092 struct mbuf *n;
2093
2094 /* sanity check */
2095 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2096 panic("key_spdget: NULL pointer is passed.\n");
2097
2098 if (mhp->ext[SADB_X_EXT_POLICY] == NULL ||
2099 mhp->extlen[SADB_X_EXT_POLICY] < sizeof(struct sadb_x_policy)) {
2100 ipseclog((LOG_DEBUG, "key_spdget: invalid message is passed.\n"));
2101 return key_senderror(so, m, EINVAL);
2102 }
2103
2104 id = ((struct sadb_x_policy *)mhp->ext[SADB_X_EXT_POLICY])->sadb_x_policy_id;
2105
2106 /* Is there SP in SPD ? */
2107 if ((sp = key_getspbyid(id)) == NULL) {
2108 ipseclog((LOG_DEBUG, "key_spdget: no SP found id:%u.\n", id));
2109 return key_senderror(so, m, ENOENT);
2110 }
2111
2112 n = key_setdumpsp(sp, SADB_X_SPDGET, 0, mhp->msg->sadb_msg_pid);
2113 if (n != NULL) {
2114 m_freem(m);
2115 return key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2116 } else
2117 return key_senderror(so, m, ENOBUFS);
2118}
2119
2120/*
2121 * SADB_X_SPDACQUIRE processing.
2122 * Acquire policy and SA(s) for a *OUTBOUND* packet.
2123 * send
2124 * <base, policy(*)>
2125 * to KMD, and expect to receive
2126 * <base> with SADB_X_SPDACQUIRE if error occured,
2127 * or
2128 * <base, policy>
2129 * with SADB_X_SPDUPDATE from KMD by PF_KEY.
2130 * policy(*) is without policy requests.
2131 *
2132 * 0 : succeed
2133 * others: error number
2134 */
2135int
9855a82b 2136key_spdacquire(struct secpolicy *sp)
984263bc
MD
2137{
2138 struct mbuf *result = NULL, *m;
2139 struct secspacq *newspacq;
2140 int error;
2141
2142 /* sanity check */
2143 if (sp == NULL)
2144 panic("key_spdacquire: NULL pointer is passed.\n");
2145 if (sp->req != NULL)
2146 panic("key_spdacquire: called but there is request.\n");
2147 if (sp->policy != IPSEC_POLICY_IPSEC)
3f625015 2148 panic("key_spdacquire: policy mismatched. IPsec is expected.\n");
984263bc
MD
2149
2150 /* Get an entry to check whether sent message or not. */
2151 if ((newspacq = key_getspacq(&sp->spidx)) != NULL) {
2152 if (key_blockacq_count < newspacq->count) {
2153 /* reset counter and do send message. */
2154 newspacq->count = 0;
2155 } else {
2156 /* increment counter and do nothing. */
2157 newspacq->count++;
2158 return 0;
2159 }
2160 } else {
2161 /* make new entry for blocking to send SADB_ACQUIRE. */
2162 if ((newspacq = key_newspacq(&sp->spidx)) == NULL)
2163 return ENOBUFS;
2164
2165 /* add to acqtree */
2166 LIST_INSERT_HEAD(&spacqtree, newspacq, chain);
2167 }
2168
2169 /* create new sadb_msg to reply. */
2170 m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
2171 if (!m) {
2172 error = ENOBUFS;
2173 goto fail;
2174 }
2175 result = m;
cd52b1e6 2176 result->m_pkthdr.len = m_lengthm(result, NULL);
984263bc
MD
2177 mtod(result, struct sadb_msg *)->sadb_msg_len =
2178 PFKEY_UNIT64(result->m_pkthdr.len);
2179
2180 return key_sendup_mbuf(NULL, m, KEY_SENDUP_REGISTERED);
2181
2182fail:
2183 if (result)
2184 m_freem(result);
2185 return error;
2186}
2187
2188/*
2189 * SADB_SPDFLUSH processing
2190 * receive
2191 * <base>
2192 * from the user, and free all entries in secpctree.
2193 * and send,
2194 * <base>
2195 * to the user.
2196 * NOTE: what to do is only marking SADB_SASTATE_DEAD.
2197 *
2198 * m will always be freed.
2199 */
2200static int
9855a82b 2201key_spdflush(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
984263bc
MD
2202{
2203 struct sadb_msg *newmsg;
2204 struct secpolicy *sp;
2205 u_int dir;
2206
2207 /* sanity check */
2208 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2209 panic("key_spdflush: NULL pointer is passed.\n");
2210
2211 if (m->m_len != PFKEY_ALIGN8(sizeof(struct sadb_msg)))
2212 return key_senderror(so, m, EINVAL);
2213
2214 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2215 LIST_FOREACH(sp, &sptree[dir], chain) {
2216 sp->state = IPSEC_SPSTATE_DEAD;
2217 }
2218 }
2219
2220 if (sizeof(struct sadb_msg) > m->m_len + M_TRAILINGSPACE(m)) {
2221 ipseclog((LOG_DEBUG, "key_spdflush: No more memory.\n"));
2222 return key_senderror(so, m, ENOBUFS);
2223 }
2224
2225 if (m->m_next)
2226 m_freem(m->m_next);
2227 m->m_next = NULL;
2228 m->m_pkthdr.len = m->m_len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
2229 newmsg = mtod(m, struct sadb_msg *);
2230 newmsg->sadb_msg_errno = 0;
2231 newmsg->sadb_msg_len = PFKEY_UNIT64(m->m_pkthdr.len);
2232
2233 return key_sendup_mbuf(so, m, KEY_SENDUP_ALL);
2234}
2235
2236/*
2237 * SADB_SPDDUMP processing
2238 * receive
2239 * <base>
2240 * from the user, and dump all SP leaves
2241 * and send,
2242 * <base> .....
2243 * to the ikmpd.
2244 *
2245 * m will always be freed.
2246 */
2247static int
9855a82b 2248key_spddump(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
984263bc
MD
2249{
2250 struct secpolicy *sp;
2251 int cnt;
2252 u_int dir;
2253 struct mbuf *n;
2254
2255 /* sanity check */
2256 if (so == NULL || m == NULL || mhp == NULL || mhp->msg == NULL)
2257 panic("key_spddump: NULL pointer is passed.\n");
2258
2259 /* search SPD entry and get buffer size. */
2260 cnt = 0;
2261 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2262 LIST_FOREACH(sp, &sptree[dir], chain) {
2263 cnt++;
2264 }
2265 }
2266
2267 if (cnt == 0)
2268 return key_senderror(so, m, ENOENT);
2269
2270 for (dir = 0; dir < IPSEC_DIR_MAX; dir++) {
2271 LIST_FOREACH(sp, &sptree[dir], chain) {
2272 --cnt;
2273 n = key_setdumpsp(sp, SADB_X_SPDDUMP, cnt,
2274 mhp->msg->sadb_msg_pid);
2275
2276 if (n)
2277 key_sendup_mbuf(so, n, KEY_SENDUP_ONE);
2278 }
2279 }
2280
2281 m_freem(m);
2282 return 0;
2283}
2284
2285static struct mbuf *
9855a82b
SW
2286key_setdumpsp(struct secpolicy *sp, u_int8_t type, u_int32_t seq,
2287 u_int32_t pid)
984263bc
MD
2288{
2289 struct mbuf *result = NULL, *m;
2290
2291 m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
2292 if (!m)
2293 goto fail;
2294 result = m;
2295
2296 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2297 &sp->spidx.src.sa, sp->spidx.prefs,
2298 sp->spidx.ul_proto);
2299 if (!m)
2300 goto fail;
2301 m_cat(result, m);
2302
2303 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2304 &sp->spidx.dst.sa, sp->spidx.prefd,
2305 sp->spidx.ul_proto);
2306 if (!m)
2307 goto fail;
2308 m_cat(result, m);
2309
2310 m = key_sp2msg(sp);
2311 if (!m)
2312 goto fail;
2313 m_cat(result, m);
2314
2315 if ((result->m_flags & M_PKTHDR) == 0)
2316 goto fail;
2317
2318 if (result->m_len < sizeof(struct sadb_msg)) {
2319 result = m_pullup(result, sizeof(struct sadb_msg));
2320 if (result == NULL)
2321 goto fail;
2322 }
cd52b1e6 2323 result->m_pkthdr.len = m_lengthm(result, NULL);
984263bc
MD
2324 mtod(result, struct sadb_msg *)->sadb_msg_len =
2325 PFKEY_UNIT64(result->m_pkthdr.len);
2326
2327 return result;
2328
2329fail:
2330 m_freem(result);
2331 return NULL;
2332}
2333
2334/*
2335 * get PFKEY message length for security policy and request.
2336 */
2337static u_int
9855a82b 2338key_getspreqmsglen(struct secpolicy *sp)
984263bc 2339{
cd52b1e6
JH
2340 struct ipsecrequest *isr;
2341 u_int tlen, len;
984263bc
MD
2342
2343 tlen = sizeof(struct sadb_x_policy);
2344
2345 /* if is the policy for ipsec ? */
2346 if (sp->policy != IPSEC_POLICY_IPSEC)
2347 return tlen;
2348
2349 /* get length of ipsec requests */
984263bc 2350 for (isr = sp->req; isr != NULL; isr = isr->next) {
cd52b1e6
JH
2351 len = sizeof(struct sadb_x_ipsecrequest) +
2352 isr->saidx.src.sa.sa_len + isr->saidx.dst.sa.sa_len;
984263bc
MD
2353
2354 tlen += PFKEY_ALIGN8(len);
2355 }
984263bc
MD
2356
2357 return tlen;
2358}
2359
2360/*
2361 * SADB_SPDEXPIRE processing
2362 * send
2363 * <base, address(SD), lifetime(CH), policy>
2364 * to KMD by PF_KEY.
2365 *
2366 * OUT: 0 : succeed
2367 * others : error number
2368 */
2369static int
9855a82b 2370key_spdexpire(struct secpolicy *sp)
984263bc 2371{
cb753a0e 2372
984263bc
MD
2373 struct mbuf *result = NULL, *m;
2374 int len;
2375 int error = -1;
2376 struct sadb_lifetime *lt;
2377
2378 /* XXX: Why do we lock ? */
cb753a0e 2379 crit_enter();
984263bc
MD
2380
2381 /* sanity check */
2382 if (sp == NULL)
2383 panic("key_spdexpire: NULL pointer is passed.\n");
2384
2385 /* set msg header */
2386 m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
2387 if (!m) {
2388 error = ENOBUFS;
2389 goto fail;
2390 }
2391 result = m;
2392
2393 /* create lifetime extension (current and hard) */
2394 len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
2395 m = key_alloc_mbuf(len);
2396 if (!m || m->m_next) { /*XXX*/
2397 if (m)
2398 m_freem(m);
2399 error = ENOBUFS;
2400 goto fail;
2401 }
2402 bzero(mtod(m, caddr_t), len);
2403 lt = mtod(m, struct sadb_lifetime *);
2404 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2405 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2406 lt->sadb_lifetime_allocations = 0;
2407 lt->sadb_lifetime_bytes = 0;
2408 lt->sadb_lifetime_addtime = sp->created;
2409 lt->sadb_lifetime_usetime = sp->lastused;
2410 lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
2411 lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2412 lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
2413 lt->sadb_lifetime_allocations = 0;
2414 lt->sadb_lifetime_bytes = 0;
2415 lt->sadb_lifetime_addtime = sp->lifetime;
2416 lt->sadb_lifetime_usetime = sp->validtime;
2417 m_cat(result, m);
2418
2419 /* set sadb_address for source */
2420 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
2421 &sp->spidx.src.sa,
2422 sp->spidx.prefs, sp->spidx.ul_proto);
2423 if (!m) {
2424 error = ENOBUFS;
2425 goto fail;
2426 }
2427 m_cat(result, m);
2428
2429 /* set sadb_address for destination */
2430 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
2431 &sp->spidx.dst.sa,
2432 sp->spidx.prefd, sp->spidx.ul_proto);
2433 if (!m) {
2434 error = ENOBUFS;
2435 goto fail;
2436 }
2437 m_cat(result, m);
2438
2439 /* set secpolicy */
2440 m = key_sp2msg(sp);
2441 if (!m) {
2442 error = ENOBUFS;
2443 goto fail;
2444 }
2445 m_cat(result, m);
2446
2447 if ((result->m_flags & M_PKTHDR) == 0) {
2448 error = EINVAL;
2449 goto fail;
2450 }
2451
2452 if (result->m_len < sizeof(struct sadb_msg)) {
2453 result = m_pullup(result, sizeof(struct sadb_msg));
2454 if (result == NULL) {
2455 error = ENOBUFS;
2456 goto fail;
2457 }
2458 }
cd52b1e6 2459 result->m_pkthdr.len = m_lengthm(result, NULL);
984263bc
MD
2460 mtod(result, struct sadb_msg *)->sadb_msg_len =
2461 PFKEY_UNIT64(result->m_pkthdr.len);
2462
2463 return key_sendup_mbuf(NULL, result, KEY_SENDUP_REGISTERED);
2464
2465 fail:
2466 if (result)
2467 m_freem(result);
cb753a0e 2468 crit_exit();
984263bc
MD
2469 return error;
2470}
2471
2472/* %%% SAD management */
2473/*
2474 * allocating a memory for new SA head, and copy from the values of mhp.
2475 * OUT: NULL : failure due to the lack of memory.
2476 * others : pointer to new SA head.
2477 */
2478static struct secashead *
9855a82b 2479key_newsah(struct secasindex *saidx)
984263bc
MD
2480{
2481 struct secashead *newsah;
2482
2483 KASSERT(saidx != NULL, ("key_newsaidx: null saidx"));
2484
efda3bd0 2485 newsah = kmalloc(sizeof(struct secashead), M_SECA,
062eab50 2486 M_INTWAIT | M_ZERO | M_NULLOK);
984263bc
MD
2487 if (newsah != NULL) {
2488 int i;
2489 for (i = 0; i < sizeof(newsah->savtree)/sizeof(newsah->savtree[0]); i++)
2490 LIST_INIT(&newsah->savtree[i]);
2491 newsah->saidx = *saidx;
2492
2493 /* add to saidxtree */
2494 newsah->state = SADB_SASTATE_MATURE;
2495 LIST_INSERT_HEAD(&sahtree, newsah, chain);
2496 }
2497 return(newsah);
2498}
2499
2500/*
cd52b1e6 2501 * Delete SA index and all registered SAs.
984263bc
MD
2502 */
2503static void
9855a82b 2504key_delsah(struct secashead *sah)
984263bc
MD
2505{
2506 struct secasvar *sav, *nextsav;
cd52b1e6
JH
2507 u_int stateidx;
2508 int nzombies = 0;
984263bc
MD
2509
2510 /* sanity check */
2511 if (sah == NULL)
2512 panic("key_delsah: NULL pointer is passed.\n");
2513
cb753a0e 2514 crit_enter();
984263bc
MD
2515
2516 /* searching all SA registerd in the secindex. */
cd52b1e6 2517 for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_any);
984263bc 2518 stateidx++) {
cd52b1e6 2519 u_int state = saorder_state_any[stateidx];
984263bc 2520
cd52b1e6 2521 LIST_FOREACH_MUTABLE(sav, &sah->savtree[state], chain, nextsav)
984263bc
MD
2522 if (sav->refcnt == 0) {
2523 /* sanity check */
cd52b1e6 2524 KEY_CHKSASTATE(state, sav->state, __func__);
984263bc
MD
2525 KEY_FREESAV(&sav);
2526 } else {
cd52b1e6
JH
2527 /* give up to delete this SA */
2528 nzombies++;
984263bc 2529 }
984263bc
MD
2530 }
2531
cd52b1e6
JH
2532 /* Delete sah it has are no savs. */
2533 if (nzombies == 0) {
2534 /* remove from tree of SA index */
2535 if (__LIST_CHAINED(sah))
2536 LIST_REMOVE(sah, chain);
2537 if (sah->sa_route.ro_rt) {
2538 RTFREE(sah->sa_route.ro_rt);
2539 sah->sa_route.ro_rt = (struct rtentry *)NULL;
2540 }
2541 KFREE(sah);
984263bc
MD
2542 }
2543
cb753a0e 2544 crit_exit();
984263bc
MD
2545 return;
2546}
2547
2548/*
2549 * allocating a new SA with LARVAL state. key_add() and key_getspi() call,
2550 * and copy the values of mhp into new buffer.
2551 * When SAD message type is GETSPI:
2552 * to set sequence number from acq_seq++,
2553 * to set zero to SPI.
2554 * not to call key_setsava().
2555 * OUT: NULL : fail
2556 * others : pointer to new secasvar.
2557 *
2558 * does not modify mbuf. does not free mbuf on error.
2559 */
2560static struct secasvar *
9855a82b
SW
2561key_newsav(struct mbuf *m, const struct sadb_msghdr *mhp, struct secashead *sah,
2562 int *errp, const char *where, int tag)
984263bc
MD
2563{
2564 struct secasvar *newsav;
2565 const struct sadb_sa *xsa;
2566
2567 /* sanity check */
2568 if (m == NULL || mhp == NULL || mhp->msg == NULL || sah == NULL)
2569 panic("key_newsa: NULL pointer is passed.\n");
2570
2571 KMALLOC(newsav, struct secasvar *, sizeof(struct secasvar));
2572 if (newsav == NULL) {
2573 ipseclog((LOG_DEBUG, "key_newsa: No more memory.\n"));
2574 *errp = ENOBUFS;
2575 goto done;
2576 }
2577 bzero((caddr_t)newsav, sizeof(struct secasvar));
2578
2579 switch (mhp->msg->sadb_msg_type) {
2580 case SADB_GETSPI:
2581 newsav->spi = 0;
2582
2583#ifdef IPSEC_DOSEQCHECK
2584 /* sync sequence number */
2585 if (mhp->msg->sadb_msg_seq == 0)
2586 newsav->seq =
2587 (acq_seq = (acq_seq == ~0 ? 1 : ++acq_seq));
2588 else
2589#endif
2590 newsav->seq = mhp->msg->sadb_msg_seq;
2591 break;
2592
2593 case SADB_ADD:
2594 /* sanity check */
2595 if (mhp->ext[SADB_EXT_SA] == NULL) {
2596 KFREE(newsav), newsav = NULL;
2597 ipseclog((LOG_DEBUG, "key_newsa: invalid message is passed.\n"));
2598 *errp = EINVAL;
2599 goto done;
2600 }
2601 xsa = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2602 newsav->spi = xsa->sadb_sa_spi;
2603 newsav->seq = mhp->msg->sadb_msg_seq;
2604 break;
2605 default:
2606 KFREE(newsav), newsav = NULL;
2607 *errp = EINVAL;
2608 goto done;
2609 }
2610
2611 /* copy sav values */
2612 if (mhp->msg->sadb_msg_type != SADB_GETSPI) {
2613 *errp = key_setsaval(newsav, m, mhp);
2614 if (*errp) {
2615 KFREE(newsav), newsav = NULL;
2616 goto done;
2617 }
2618 }
2619
2620 /* reset created */
2621 newsav->created = time_second;
2622 newsav->pid = mhp->msg->sadb_msg_pid;
2623
2624 /* add to satree */
2625 newsav->sah = sah;
2626 newsav->refcnt = 1;
2627 newsav->state = SADB_SASTATE_LARVAL;
2628 LIST_INSERT_TAIL(&sah->savtree[SADB_SASTATE_LARVAL], newsav,
2629 secasvar, chain);
2630done:
2631 KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
a6ec04bc 2632 kprintf("DP key_newsav from %s:%u return SP:%p\n",
984263bc
MD
2633 where, tag, newsav));
2634
2635 return newsav;
2636}
2637
2638/*
2639 * free() SA variable entry.
2640 */
2641static void
9855a82b 2642key_delsav(struct secasvar *sav)
984263bc
MD
2643{
2644 KASSERT(sav != NULL, ("key_delsav: null sav"));
2645 KASSERT(sav->refcnt == 0,
2646 ("key_delsav: reference count %u > 0", sav->refcnt));
2647
2648 /* remove from SA header */
2649 if (__LIST_CHAINED(sav))
2650 LIST_REMOVE(sav, chain);
2651
030929e2
JH
2652 /*
2653 * Cleanup xform state. Note that zeroize'ing causes the
2654 * keys to be cleared; otherwise we must do it ourself.
2655 */
2656 if (sav->tdb_xform != NULL) {
2657 sav->tdb_xform->xf_zeroize(sav);
2658 sav->tdb_xform = NULL;
2659 } else {
2660 if (sav->key_auth != NULL)
2661 bzero(_KEYBUF(sav->key_auth), _KEYLEN(sav->key_auth));
2662 if (sav->key_enc != NULL)
2663 bzero(_KEYBUF(sav->key_enc), _KEYLEN(sav->key_enc));
2664 }
984263bc 2665 if (sav->key_auth != NULL) {
984263bc
MD
2666 KFREE(sav->key_auth);
2667 sav->key_auth = NULL;
2668 }
2669 if (sav->key_enc != NULL) {
984263bc
MD
2670 KFREE(sav->key_enc);
2671 sav->key_enc = NULL;
2672 }
2673 if (sav->sched) {
2674 bzero(sav->sched, sav->schedlen);
2675 KFREE(sav->sched);
2676 sav->sched = NULL;
2677 }
2678 if (sav->replay != NULL) {
2679 KFREE(sav->replay);
2680 sav->replay = NULL;
2681 }
2682 if (sav->lft_c != NULL) {
2683 KFREE(sav->lft_c);
2684 sav->lft_c = NULL;
2685 }
2686 if (sav->lft_h != NULL) {
2687 KFREE(sav->lft_h);
2688 sav->lft_h = NULL;
2689 }
2690 if (sav->lft_s != NULL) {
2691 KFREE(sav->lft_s);
2692 sav->lft_s = NULL;
2693 }
2694 if (sav->iv != NULL) {
2695 KFREE(sav->iv);
2696 sav->iv = NULL;
2697 }
2698
2699 KFREE(sav);
2700
2701 return;
2702}
2703
2704/*
2705 * search SAD.
2706 * OUT:
2707 * NULL : not found
2708 * others : found, pointer to a SA.
2709 */
2710static struct secashead *
9855a82b 2711key_getsah(struct secasindex *saidx)
984263bc
MD
2712{
2713 struct secashead *sah;
2714
2715 LIST_FOREACH(sah, &sahtree, chain) {
2716 if (sah->state == SADB_SASTATE_DEAD)
2717 continue;
2718 if (key_cmpsaidx(&sah->saidx, saidx, CMP_REQID))
2719 return sah;
2720 }
2721
2722 return NULL;
2723}
2724
2725/*
2726 * check not to be duplicated SPI.
2727 * NOTE: this function is too slow due to searching all SAD.
2728 * OUT:
2729 * NULL : not found
2730 * others : found, pointer to a SA.
2731 */
2732static struct secasvar *
9855a82b 2733key_checkspidup(struct secasindex *saidx, u_int32_t spi)
984263bc
MD
2734{
2735 struct secashead *sah;
2736 struct secasvar *sav;
2737
2738 /* check address family */
2739 if (saidx->src.sa.sa_family != saidx->dst.sa.sa_family) {
2740 ipseclog((LOG_DEBUG, "key_checkspidup: address family mismatched.\n"));
2741 return NULL;
2742 }
2743
2744 /* check all SAD */
2745 LIST_FOREACH(sah, &sahtree, chain) {
2746 if (!key_ismyaddr((struct sockaddr *)&sah->saidx.dst))
2747 continue;
2748 sav = key_getsavbyspi(sah, spi);
2749 if (sav != NULL)
2750 return sav;
2751 }
2752
2753 return NULL;
2754}
2755
2756/*
2757 * search SAD litmited alive SA, protocol, SPI.
2758 * OUT:
2759 * NULL : not found
2760 * others : found, pointer to a SA.
2761 */
2762static struct secasvar *
9855a82b 2763key_getsavbyspi(struct secashead *sah, u_int32_t spi)
984263bc
MD
2764{
2765 struct secasvar *sav;
cd52b1e6 2766 u_int stateidx;
984263bc
MD
2767
2768 /* search all status */
cd52b1e6 2769 for (stateidx = 0; stateidx < _ARRAYLEN(saorder_state_alive);
984263bc 2770 stateidx++) {
cd52b1e6 2771 u_int state = saorder_state_alive[stateidx];
984263bc 2772
984263bc 2773 LIST_FOREACH(sav, &sah->savtree[state], chain) {
984263bc
MD
2774 /* sanity check */
2775 if (sav->state != state) {
2776 ipseclog((LOG_DEBUG, "key_getsavbyspi: "
2777 "invalid sav->state (queue: %d SA: %d)\n",
2778 state, sav->state));
2779 continue;
2780 }
2781
2782 if (sav->spi == spi)
2783 return sav;
2784 }
2785 }
2786
2787 return NULL;
2788}
2789
2790/*
2791 * copy SA values from PF_KEY message except *SPI, SEQ, PID, STATE and TYPE*.
2792 * You must update these if need.
2793 * OUT: 0: success.
2794 * !0: failure.
2795 *
2796 * does not modify mbuf. does not free mbuf on error.
2797 */
2798static int
9855a82b
SW
2799key_setsaval(struct secasvar *sav, struct mbuf *m,
2800 const struct sadb_msghdr *mhp)
984263bc
MD
2801{
2802 int error = 0;
2803
2804 /* sanity check */
2805 if (m == NULL || mhp == NULL || mhp->msg == NULL)
2806 panic("key_setsaval: NULL pointer is passed.\n");
2807
2808 /* initialization */
2809 sav->replay = NULL;
2810 sav->key_auth = NULL;
2811 sav->key_enc = NULL;
2812 sav->sched = NULL;
2813 sav->schedlen = 0;
2814 sav->iv = NULL;
2815 sav->lft_c = NULL;
2816 sav->lft_h = NULL;
2817 sav->lft_s = NULL;
2818 sav->tdb_xform = NULL; /* transform */
2819 sav->tdb_encalgxform = NULL; /* encoding algorithm */
2820 sav->tdb_authalgxform = NULL; /* authentication algorithm */
2821 sav->tdb_compalgxform = NULL; /* compression algorithm */
2822
2823 /* SA */
2824 if (mhp->ext[SADB_EXT_SA] != NULL) {
2825 const struct sadb_sa *sa0;
2826
2827 sa0 = (const struct sadb_sa *)mhp->ext[SADB_EXT_SA];
2828 if (mhp->extlen[SADB_EXT_SA] < sizeof(*sa0)) {
2829 error = EINVAL;
2830 goto fail;
2831 }
2832
2833 sav->alg_auth = sa0->sadb_sa_auth;
2834 sav->alg_enc = sa0->sadb_sa_encrypt;
2835 sav->flags = sa0->sadb_sa_flags;
2836
2837 /* replay window */
2838 if ((sa0->sadb_sa_flags & SADB_X_EXT_OLD) == 0) {
062eab50 2839 sav->replay =
896d25fc 2840 kmalloc(sizeof(struct secreplay)+sa0->sadb_sa_replay,
062eab50 2841 M_SECA, M_INTWAIT | M_ZERO | M_NULLOK);
984263bc
MD
2842 if (sav->replay == NULL) {
2843 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2844 error = ENOBUFS;
2845 goto fail;
2846 }
2847 if (sa0->sadb_sa_replay != 0)
2848 sav->replay->bitmap = (caddr_t)(sav->replay+1);
2849 sav->replay->wsize = sa0->sadb_sa_replay;
2850 }
2851 }
2852
2853 /* Authentication keys */
2854 if (mhp->ext[SADB_EXT_KEY_AUTH] != NULL) {
2855 const struct sadb_key *key0;
2856 int len;
2857
2858 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_AUTH];
2859 len = mhp->extlen[SADB_EXT_KEY_AUTH];
2860
2861 error = 0;
2862 if (len < sizeof(*key0)) {
2863 error = EINVAL;
2864 goto fail;
2865 }
2866 switch (mhp->msg->sadb_msg_satype) {
2867 case SADB_SATYPE_AH:
2868 case SADB_SATYPE_ESP:
2869 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2870 sav->alg_auth != SADB_X_AALG_NULL)
2871 error = EINVAL;
2872 break;
2873 case SADB_X_SATYPE_IPCOMP:
2874 default:
2875 error = EINVAL;
2876 break;
2877 }
2878 if (error) {
2879 ipseclog((LOG_DEBUG, "key_setsaval: invalid key_auth values.\n"));
2880 goto fail;
2881 }
2882
2883 sav->key_auth = (struct sadb_key *)key_newbuf(key0, len);
2884 if (sav->key_auth == NULL) {
2885 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2886 error = ENOBUFS;
2887 goto fail;
2888 }
2889 }
2890
2891 /* Encryption key */
2892 if (mhp->ext[SADB_EXT_KEY_ENCRYPT] != NULL) {
2893 const struct sadb_key *key0;
2894 int len;
2895
2896 key0 = (const struct sadb_key *)mhp->ext[SADB_EXT_KEY_ENCRYPT];
2897 len = mhp->extlen[SADB_EXT_KEY_ENCRYPT];
2898
2899 error = 0;
2900 if (len < sizeof(*key0)) {
2901 error = EINVAL;
2902 goto fail;
2903 }
2904 switch (mhp->msg->sadb_msg_satype) {
2905 case SADB_SATYPE_ESP:
2906 if (len == PFKEY_ALIGN8(sizeof(struct sadb_key)) &&
2907 sav->alg_enc != SADB_EALG_NULL) {
2908 error = EINVAL;
2909 break;
2910 }
2911 sav->key_enc = (struct sadb_key *)key_newbuf(key0, len);
2912 if (sav->key_enc == NULL) {
2913 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2914 error = ENOBUFS;
2915 goto fail;
2916 }
2917 break;
2918 case SADB_X_SATYPE_IPCOMP:
2919 if (len != PFKEY_ALIGN8(sizeof(struct sadb_key)))
2920 error = EINVAL;
2921 sav->key_enc = NULL; /*just in case*/
2922 break;
2923 case SADB_SATYPE_AH:
2924 default:
2925 error = EINVAL;
2926 break;
2927 }
2928 if (error) {
2929 ipseclog((LOG_DEBUG, "key_setsatval: invalid key_enc value.\n"));
2930 goto fail;
2931 }
2932 }
2933
2934 /* set iv */
2935 sav->ivlen = 0;
2936
2937 switch (mhp->msg->sadb_msg_satype) {
2938 case SADB_SATYPE_AH:
2939 error = xform_init(sav, XF_AH);
2940 break;
2941 case SADB_SATYPE_ESP:
2942 error = xform_init(sav, XF_ESP);
2943 break;
2944 case SADB_X_SATYPE_IPCOMP:
2945 error = xform_init(sav, XF_IPCOMP);
2946 break;
2947 }
2948 if (error) {
2949 ipseclog((LOG_DEBUG,
2950 "key_setsaval: unable to initialize SA type %u.\n",
2951 mhp->msg->sadb_msg_satype));
2952 goto fail;
2953 }
2954
2955 /* reset created */
2956 sav->created = time_second;
2957
2958 /* make lifetime for CURRENT */
2959 KMALLOC(sav->lft_c, struct sadb_lifetime *,
2960 sizeof(struct sadb_lifetime));
2961 if (sav->lft_c == NULL) {
2962 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2963 error = ENOBUFS;
2964 goto fail;
2965 }
2966
2967 sav->lft_c->sadb_lifetime_len =
2968 PFKEY_UNIT64(sizeof(struct sadb_lifetime));
2969 sav->lft_c->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
2970 sav->lft_c->sadb_lifetime_allocations = 0;
2971 sav->lft_c->sadb_lifetime_bytes = 0;
2972 sav->lft_c->sadb_lifetime_addtime = time_second;
2973 sav->lft_c->sadb_lifetime_usetime = 0;
2974
2975 /* lifetimes for HARD and SOFT */
2976 {
2977 const struct sadb_lifetime *lft0;
2978
2979 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_HARD];
2980 if (lft0 != NULL) {
2981 if (mhp->extlen[SADB_EXT_LIFETIME_HARD] < sizeof(*lft0)) {
2982 error = EINVAL;
2983 goto fail;
2984 }
2985 sav->lft_h = (struct sadb_lifetime *)key_newbuf(lft0,
2986 sizeof(*lft0));
2987 if (sav->lft_h == NULL) {
2988 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
2989 error = ENOBUFS;
2990 goto fail;
2991 }
2992 /* to be initialize ? */
2993 }
2994
2995 lft0 = (struct sadb_lifetime *)mhp->ext[SADB_EXT_LIFETIME_SOFT];
2996 if (lft0 != NULL) {
2997 if (mhp->extlen[SADB_EXT_LIFETIME_SOFT] < sizeof(*lft0)) {
2998 error = EINVAL;
2999 goto fail;
3000 }
3001 sav->lft_s = (struct sadb_lifetime *)key_newbuf(lft0,
3002 sizeof(*lft0));
3003 if (sav->lft_s == NULL) {
3004 ipseclog((LOG_DEBUG, "key_setsaval: No more memory.\n"));
3005 error = ENOBUFS;
3006 goto fail;
3007 }
3008 /* to be initialize ? */
3009 }
3010 }
3011
3012 return 0;
3013
3014 fail:
3015 /* initialization */
3016 if (sav->replay != NULL) {
3017 KFREE(sav->replay);
3018 sav->replay = NULL;
3019 }
3020 if (sav->key_auth != NULL) {
3021 KFREE(sav->key_auth);
3022 sav->key_auth = NULL;
3023 }
3024 if (sav->key_enc != NULL) {
3025 KFREE(sav->key_enc);
3026 sav->key_enc = NULL;
3027 }
3028 if (sav->sched) {
3029 KFREE(sav->sched);
3030 sav->sched = NULL;
3031 }
3032 if (sav->iv != NULL) {
3033 KFREE(sav->iv);
3034 sav->iv = NULL;
3035 }
3036 if (sav->lft_c != NULL) {
3037 KFREE(sav->lft_c);
3038 sav->lft_c = NULL;
3039 }
3040 if (sav->lft_h != NULL) {
3041 KFREE(sav->lft_h);
3042 sav->lft_h = NULL;
3043 }
3044 if (sav->lft_s != NULL) {
3045 KFREE(sav->lft_s);
3046 sav->lft_s = NULL;
3047 }
3048
3049 return error;
3050}
3051
3052/*
3053 * validation with a secasvar entry, and set SADB_SATYPE_MATURE.
3054 * OUT: 0: valid
3055 * other: errno
3056 */
3057static int
9855a82b 3058key_mature(struct secasvar *sav)
984263bc
MD
3059{
3060 int error;
3061
3062 /* check SPI value */
3063 switch (sav->sah->saidx.proto) {
3064 case IPPROTO_ESP:
3065 case IPPROTO_AH:
3066 if (ntohl(sav->spi) >= 0 && ntohl(sav->spi) <= 255) {
3067 ipseclog((LOG_DEBUG,
3068 "key_mature: illegal range of SPI %u.\n",
3069 (u_int32_t)ntohl(sav->spi)));
3070 return EINVAL;
3071 }
3072 break;
3073 }
3074
3075 /* check satype */
3076 switch (sav->sah->saidx.proto) {
3077 case IPPROTO_ESP:
3078 /* check flags */
3079 if ((sav->flags & (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) ==
3080 (SADB_X_EXT_OLD|SADB_X_EXT_DERIV)) {
3081 ipseclog((LOG_DEBUG, "key_mature: "
3082 "invalid flag (derived) given to old-esp.\n"));
3083 return EINVAL;
3084 }
3085 error = xform_init(sav, XF_ESP);
3086 break;
3087 case IPPROTO_AH:
3088 /* check flags */
3089 if (sav->flags & SADB_X_EXT_DERIV) {
3090 ipseclog((LOG_DEBUG, "key_mature: "
3091 "invalid flag (derived) given to AH SA.\n"));
3092 return EINVAL;
3093 }
3094 if (sav->alg_enc != SADB_EALG_NONE) {
3095 ipseclog((LOG_DEBUG, "key_mature: "
3096 "protocol and algorithm mismated.\n"));
3097 return(EINVAL);
3098 }
3099 error = xform_init(sav, XF_AH);
3100 break;
3101 case IPPROTO_IPCOMP:
3102 if (sav->alg_auth != SADB_AALG_NONE) {
3103 ipseclog((LOG_DEBUG, "key_mature: "
3104 "protocol and algorithm mismated.\n"));
3105 return(EINVAL);
3106 }
3107 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0
3108 && ntohl(sav->spi) >= 0x10000) {
3109 ipseclog((LOG_DEBUG, "key_mature: invalid cpi for IPComp.\n"));
3110 return(EINVAL);
3111 }
3112 error = xform_init(sav, XF_IPCOMP);
3113 break;
3114 default:
3115 ipseclog((LOG_DEBUG, "key_mature: Invalid satype.\n"));
3116 error = EPROTONOSUPPORT;
3117 break;
3118 }
3119 if (error == 0)
3120 key_sa_chgstate(sav, SADB_SASTATE_MATURE);
3121 return (error);
3122}
3123
3124/*
3125 * subroutine for SADB_GET and SADB_DUMP.
3126 */
3127static struct mbuf *
9855a82b
SW
3128key_setdumpsa(struct secasvar *sav, u_int8_t type, u_int8_t satype,
3129 u_int32_t seq, u_int32_t pid)
984263bc
MD
3130{
3131 struct mbuf *result = NULL, *tres = NULL, *m;
3132 int l = 0;
3133 int i;
3134 void *p;
3135 int dumporder[] = {
3136 SADB_EXT_SA, SADB_X_EXT_SA2,
3137 SADB_EXT_LIFETIME_HARD, SADB_EXT_LIFETIME_SOFT,
3138 SADB_EXT_LIFETIME_CURRENT, SADB_EXT_ADDRESS_SRC,
3139 SADB_EXT_ADDRESS_DST, SADB_EXT_ADDRESS_PROXY, SADB_EXT_KEY_AUTH,
3140 SADB_EXT_KEY_ENCRYPT, SADB_EXT_IDENTITY_SRC,
3141 SADB_EXT_IDENTITY_DST, SADB_EXT_SENSITIVITY,
3142 };
3143
3144 m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
3145 if (m == NULL)
3146 goto fail;
3147 result = m;
3148
3149 for (i = sizeof(dumporder)/sizeof(dumporder[0]) - 1; i >= 0; i--) {
3150 m = NULL;
3151 p = NULL;
3152 switch (dumporder[i]) {
3153 case SADB_EXT_SA:
3154 m = key_setsadbsa(sav);
3155 if (!m)
3156 goto fail;
3157 break;
3158
3159 case SADB_X_EXT_SA2:
3160 m = key_setsadbxsa2(sav->sah->saidx.mode,
3161 sav->replay ? sav->replay->count : 0,
3162 sav->sah->saidx.reqid);
3163 if (!m)
3164 goto fail;
3165 break;
3166
3167 case SADB_EXT_ADDRESS_SRC:
3168 m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
3169 &sav->sah->saidx.src.sa,
3170 FULLMASK, IPSEC_ULPROTO_ANY);
3171 if (!m)
3172 goto fail;
3173 break;
3174
3175 case SADB_EXT_ADDRESS_DST:
3176 m = key_setsadbaddr(SADB_EXT_ADDRESS_DST,
3177 &sav->sah->saidx.dst.sa,
3178 FULLMASK, IPSEC_ULPROTO_ANY);
3179 if (!m)
3180 goto fail;
3181 break;
3182
3183 case SADB_EXT_KEY_AUTH:
3184 if (!sav->key_auth)
3185 continue;
3186 l = PFKEY_UNUNIT64(sav->key_auth->sadb_key_len);
3187 p = sav->key_auth;
3188 break;
3189
3190 case SADB_EXT_KEY_ENCRYPT:
3191 if (!sav->key_enc)
3192 continue;
3193 l = PFKEY_UNUNIT64(sav->key_enc->sadb_key_len);
3194 p = sav->key_enc;
3195 break;
3196
3197 case SADB_EXT_LIFETIME_CURRENT:
3198 if (!sav->lft_c)
3199 continue;
3200 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_c)->sadb_ext_len);
3201 p = sav->lft_c;
3202 break;
3203
3204 case SADB_EXT_LIFETIME_HARD:
3205 if (!sav->lft_h)
3206 continue;
3207 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_h)->sadb_ext_len);
3208 p = sav->lft_h;
3209 break;
3210
3211 case SADB_EXT_LIFETIME_SOFT:
3212 if (!sav->lft_s)
3213 continue;
3214 l = PFKEY_UNUNIT64(((struct sadb_ext *)sav->lft_s)->sadb_ext_len);
3215 p = sav->lft_s;
3216 break;
3217
3218 case SADB_EXT_ADDRESS_PROXY:
3219 case SADB_EXT_IDENTITY_SRC:
3220 case SADB_EXT_IDENTITY_DST:
3221 /* XXX: should we brought from SPD ? */
3222 case SADB_EXT_SENSITIVITY:
3223 default:
3224 continue;
3225 }
3226
3227 if ((!m && !p) || (m && p))
3228 goto fail;
3229 if (p && tres) {
74f1caca 3230 M_PREPEND(tres, l, MB_DONTWAIT);
984263bc
MD
3231 if (!tres)
3232 goto fail;
3233 bcopy(p, mtod(tres, caddr_t), l);
3234 continue;
3235 }
3236 if (p) {
3237 m = key_alloc_mbuf(l);
3238 if (!m)
3239 goto fail;
3240 m_copyback(m, 0, l, p);
3241 }
3242
3243 if (tres)
3244 m_cat(m, tres);
3245 tres = m;
3246 }
3247
3248 m_cat(result, tres);
3249
3250 if (result->m_len < sizeof(struct sadb_msg)) {
3251 result = m_pullup(result, sizeof(struct sadb_msg));
3252 if (result == NULL)
3253 goto fail;
3254 }
cd52b1e6 3255 result->m_pkthdr.len = m_lengthm(result, NULL);
984263bc
MD
3256 mtod(result, struct sadb_msg *)->sadb_msg_len =
3257 PFKEY_UNIT64(result->m_pkthdr.len);
3258
3259 return result;
3260
3261fail:
3262 m_freem(result);
3263 m_freem(tres);
3264 return NULL;
3265}
3266
3267/*
3268 * set data into sadb_msg.
3269 */
3270static struct mbuf *
9855a82b
SW
3271key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq,
3272 pid_t pid, u_int16_t reserved)
984263bc
MD
3273{
3274 struct mbuf *m;
3275 struct sadb_msg *p;
3276 int len;
3277
3278 len = PFKEY_ALIGN8(sizeof(struct sadb_msg));
3279 if (len > MCLBYTES)
3280 return NULL;
cd52b1e6 3281 m = m_getb(len, MB_DONTWAIT, MT_DATA, M_PKTHDR);
984263bc
MD
3282 if (!m)
3283 return NULL;
3284 m->m_pkthdr.len = m->m_len = len;
984263bc
MD
3285
3286 p = mtod(m, struct sadb_msg *);
3287
3288 bzero(p, len);
3289 p->sadb_msg_version = PF_KEY_V2;
3290 p->sadb_msg_type = type;
3291 p->sadb_msg_errno = 0;
3292 p->sadb_msg_satype = satype;
3293 p->sadb_msg_len = PFKEY_UNIT64(tlen);
3294 p->sadb_msg_reserved = reserved;
3295 p->sadb_msg_seq = seq;
3296 p->sadb_msg_pid = (u_int32_t)pid;
3297
3298 return m;
3299}
3300
3301/*
3302 * copy secasvar data into sadb_address.
3303 */
3304static struct mbuf *
9855a82b 3305key_setsadbsa(struct secasvar *sav)
984263bc
MD
3306{
3307 struct mbuf *m;
3308 struct sadb_sa *p;
3309 int len;
3310
3311 len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
3312 m = key_alloc_mbuf(len);
3313 if (!m || m->m_next) { /*XXX*/
3314 if (m)
3315 m_freem(m);
3316 return NULL;
3317 }
3318
3319 p = mtod(m, struct sadb_sa *);
3320
3321 bzero(p, len);
3322 p->sadb_sa_len = PFKEY_UNIT64(len);
3323 p->sadb_sa_exttype = SADB_EXT_SA;
3324 p->sadb_sa_spi = sav->spi;
3325 p->sadb_sa_replay = (sav->replay != NULL ? sav->replay->wsize : 0);
3326 p->sadb_sa_state = sav->state;
3327 p->sadb_sa_auth = sav->alg_auth;
3328 p->sadb_sa_encrypt = sav->alg_enc;
3329 p->sadb_sa_flags = sav->flags;
3330
3331 return m;
3332}
3333
3334/*
3335 * set data into sadb_address.
3336 */
3337static struct mbuf *
9855a82b
SW
3338key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr, u_int8_t prefixlen,
3339 u_int16_t ul_proto)
984263bc
MD
3340{
3341 struct mbuf *m;
3342 struct sadb_address *p;
3343 size_t len;
3344
3345 len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
3346 PFKEY_ALIGN8(saddr->sa_len);
3347 m = key_alloc_mbuf(len);
3348 if (!m || m->m_next) { /*XXX*/
3349 if (m)
3350 m_freem(m);
3351 return NULL;
3352 }
3353
3354 p = mtod(m, struct sadb_address *);
3355
3356 bzero(p, len);
3357 p->sadb_address_len = PFKEY_UNIT64(len);
3358 p->sadb_address_exttype = exttype;
3359 p->sadb_address_proto = ul_proto;
3360 if (prefixlen == FULLMASK) {
3361 switch (saddr->sa_family) {
3362 case AF_INET:
3363 prefixlen = sizeof(struct in_addr) << 3;
3364 break;
3365 case AF_INET6:
3366 prefixlen = sizeof(struct in6_addr) << 3;
3367 break;
3368 default:
3369 ; /*XXX*/
3370 }
3371 }
3372 p->sadb_address_prefixlen = prefixlen;
3373 p->sadb_address_reserved = 0;
3374
3375 bcopy(saddr,
3376 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
3377 saddr->sa_len);
3378
3379 return m;
3380}
3381
3382#if 0
3383/*
3384 * set data into sadb_ident.
3385 */
3386static struct mbuf *
9855a82b
SW
3387key_setsadbident(u_int16_t exttype, u_int16_t idtype, caddr_t string,
3388 int stringlen, u_int64_t id)
984263bc
MD
3389{
3390 struct mbuf *m;
3391 struct sadb_ident *p;
3392 size_t len;
3393
3394 len = PFKEY_ALIGN8(sizeof(struct sadb_ident)) + PFKEY_ALIGN8(stringlen);
3395 m = key_alloc_mbuf(len);
3396 if (!m || m->m_next) { /*XXX*/
3397 if (m)
3398 m_freem(m);
3399 return NULL;
3400 }
3401
3402 p = mtod(m, struct sadb_ident *);
3403
3404 bzero(p, len);
3405 p->sadb_ident_len = PFKEY_UNIT64(len);
3406 p->sadb_ident_exttype = exttype;
3407 p->sadb_ident_type = idtype;
3408 p->sadb_ident_reserved = 0;
3409 p->sadb_ident_id = id;
3410
3411 bcopy(string,
3412 mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_ident)),
3413 stringlen);
3414
3415 return m;
3416}
3417#endif
3418
3419/*
3420 * set data into sadb_x_sa2.
3421 */
3422static struct mbuf *
9855a82b 3423key_setsadbxsa2(u_int8_t mode, u_int32_t seq, u_int32_t reqid)
984263bc
MD
3424{
3425 struct mbuf *m;
3426 struct sadb_x_sa2 *p;
3427 size_t len;
3428
3429 len = PFKEY_ALIGN8(sizeof(struct sadb_x_sa2));
3430 m = key_alloc_mbuf(len);
3431 if (!m || m->m_next) { /*XXX*/
3432 if (m)
3433 m_freem(m);
3434 return NULL;
3435 }
3436
3437 p = mtod(m, struct sadb_x_sa2 *);
3438
3439 bzero(p, len);
3440 p->sadb_x_sa2_len = PFKEY_UNIT64(len);
3441 p->sadb_x_sa2_exttype = SADB_X_EXT_SA2;
3442 p->sadb_x_sa2_mode = mode;
3443 p->sadb_x_sa2_reserved1 = 0;
3444 p->sadb_x_sa2_reserved2 = 0;
3445 p->sadb_x_sa2_sequence = seq;
3446 p->sadb_x_sa2_reqid = reqid;
3447
3448 return m;
3449}
3450
3451/*
3452 * set data into sadb_x_policy
3453 */
3454static struct mbuf *
9855a82b 3455key_setsadbxpolicy(u_int16_t type, u_int8_t dir, u_int32_t id)
984263bc
MD
3456{
3457 struct mbuf *m;
3458 struct sadb_x_policy *p;
3459 size_t len;
3460
3461 len = PFKEY_ALIGN8(sizeof(struct sadb_x_policy));
3462 m = key_alloc_mbuf(len);
3463 if (!m || m->m_next) { /*XXX*/
3464 if (m)
3465 m_freem(m);
3466 return NULL;
3467 }
3468
3469 p = mtod(m, struct sadb_x_policy *);
3470
3471 bzero(p, len);
3472 p->sadb_x_policy_len = PFKEY_UNIT64(len);
3473 p->sadb_x_policy_exttype = SADB_X_EXT_POLICY;
3474 p->sadb_x_policy_type = type;
3475 p->sadb_x_policy_dir = dir;
3476 p->sadb_x_policy_id = id;
3477
3478 return m;
3479}
3480
3481/* %%% utilities */
3482/*
3483 * copy a buffer into the new buffer allocated.
3484 */
3485static void *
9855a82b 3486key_newbuf(const void *src, u_int len)
984263bc
MD
3487{
3488 caddr_t new;
3489
3490 KMALLOC(new, caddr_t, len);
3491 if (new == NULL) {
3492 ipseclog((LOG_DEBUG, "key_newbuf: No more memory.\n"));
3493 return NULL;
3494 }
3495 bcopy(src, new, len);
3496
3497 return new;
3498}
3499
3500/* compare my own address
3501 * OUT: 1: true, i.e. my address.
3502 * 0: false
3503 */
3504int
9855a82b 3505key_ismyaddr(struct sockaddr *sa)
984263bc
MD
3506{
3507#ifdef INET
3508 struct sockaddr_in *sin;
1b562c24 3509 struct in_ifaddr_container *iac;
984263bc
MD
3510#endif
3511
3512 /* sanity check */
3513 if (sa == NULL)
3514 panic("key_ismyaddr: NULL pointer is passed.\n");
3515
3516 switch (sa->sa_family) {
3517#ifdef INET
3518 case AF_INET:
3519 sin = (struct sockaddr_in *)sa;
1b562c24
SZ
3520 TAILQ_FOREACH(iac, &in_ifaddrheads[mycpuid], ia_link) {
3521 struct in_ifaddr *ia = iac->ia;
3522
984263bc
MD
3523 if (sin->sin_family == ia->ia_addr.sin_family &&
3524 sin->sin_len == ia->ia_addr.sin_len &&
3525 sin->sin_addr.s_addr == ia->ia_addr.sin_addr.s_addr)
3526 {
3527 return 1;
3528 }
3529 }
3530 break;
3531#endif
3532#ifdef INET6
3533 case AF_INET6:
3534 return key_ismyaddr6((struct sockaddr_in6 *)sa);
3535#endif
3536 }
3537
3538 return 0;
3539}
3540
3541#ifdef INET6
3542/*
3543 * compare my own address for IPv6.
3544 * 1: ours
3545 * 0: other
3546 * NOTE: derived ip6_input() in KAME. This is necessary to modify more.
3547 */
3548#include <netinet6/in6_var.h>
3549
3550static int
9855a82b 3551key_ismyaddr6(struct sockaddr_in6 *sin6)
984263bc
MD
3552{
3553 struct in6_ifaddr *ia;
3554 struct in6_multi *in6m;
3555
3556 for (ia = in6_ifaddr; ia; ia = ia->ia_next) {
3557 if (key_sockaddrcmp((struct sockaddr *)&sin6,
3558 (struct sockaddr *)&ia->ia_addr, 0) == 0)
3559 return 1;
3560
3561 /*
3562 * XXX Multicast
3563 * XXX why do we care about multlicast here while we don't care
3564 * about IPv4 multicast??
3565 * XXX scope
3566 */
3567 in6m = NULL;
3568 IN6_LOOKUP_MULTI(sin6->sin6_addr, ia->ia_ifp, in6m);
3569 if (in6m)
3570 return 1;
3571 }
3572
3573 /* loopback, just for safety */
3574 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
3575 return 1;
3576
3577 return 0;
3578}
3579#endif /*INET6*/
3580
3581/*
3582 * compare two secasindex structure.
3583 * flag can specify to compare 2 saidxes.
3584 * compare two secasindex structure without both mode and reqid.
3585 * don't compare port.
3586 * IN:
3587 * saidx0: source, it can be in SAD.
3588 * saidx1: object.
3589 * OUT:
3590 * 1 : equal
3591 * 0 : not equal
3592 */
3593static int
3594key_cmpsaidx(
3595 const struct secasindex *saidx0,
3596 const struct secasindex *saidx1,
3597 int flag)
3598{
3599 /* sanity */
3600 if (saidx0 == NULL && saidx1 == NULL)
3601 return 1;
3602
3603 if (saidx0 == NULL || saidx1 == NULL)
3604 return 0;
3605
3606 if (saidx0->proto != saidx1->proto)
3607 return 0;
3608
3609 if (flag == CMP_EXACTLY) {
3610 if (saidx0->mode != saidx1->mode)
3611 return 0;
3612 if (saidx0->reqid != saidx1->reqid)
3613 return 0;
3614 if (bcmp(&saidx0->src, &saidx1->src, saidx0->src.sa.sa_len) != 0 ||
3615 bcmp(&saidx0->dst, &saidx1->dst, saidx0->dst.sa.sa_len) != 0)
3616 return 0;
3617 } else {
3618
3619 /* CMP_MODE_REQID, CMP_REQID, CMP_HEAD */
3620 if (flag == CMP_MODE_REQID
3621 ||flag == CMP_REQID) {
3622 /*
3623 * If reqid of SPD is non-zero, unique SA is required.
3624 * The result must be of same reqid in this case.
3625 */
3626 if (saidx1->reqid != 0 && saidx0->reqid != saidx1->reqid)
3627 return 0;
3628 }
3629
3630 if (flag == CMP_MODE_REQID) {
3631 if (saidx0->mode != IPSEC_MODE_ANY
3632 && saidx0->mode != saidx1->mode)
3633 return 0;
3634 }
3635
3636 if (key_sockaddrcmp(&saidx0->src.sa, &saidx1->src.sa, 0) != 0) {
3637 return 0;
3638 }
3639 if (key_sockaddrcmp(&saidx0->dst.sa, &saidx1->dst.sa, 0) != 0) {
3640 return 0;
3641 }
3642 }
3643
3644 return 1;
3645}
3646
3647/*
3648 * compare two secindex structure exactly.
3649 * IN:
3650 * spidx0: source, it is often in SPD.
3651 * spidx1: object, it is often from PFKEY message.
3652 * OUT:
3653 * 1 : equal
3654 * 0 : not equal
3655 */
3656static int
3657key_cmpspidx_exactly(
3658 struct secpolicyindex *spidx0,
3659 struct secpolicyindex *spidx1)
3660{
3661 /* sanity */
3662 if (spidx0 == NULL && spidx1 == NULL)
3663 return 1;
3664
3665 if (spidx0 == NULL || spidx1 == NULL)
3666 return 0;
3667
3668 if (spidx0->prefs != spidx1->prefs
3669 || spidx0->prefd != spidx1->prefd
3670 || spidx0->ul_proto != spidx1->ul_proto)
3671 return 0;
3672
3673 return key_sockaddrcmp(&spidx0->src.sa, &spidx1->src.sa, 1) == 0 &&
3674 key_sockaddrcmp(&spidx0->dst.sa, &spidx1->dst.sa, 1) == 0;
3675}
3676
3677/*
3678 * compare two secindex structure with mask.
3679 * IN:
3680 * spidx0: source, it is often in SPD.
3681 * spidx1: object, it is often from IP header.
3682 * OUT:
3683 * 1 : equal
3684 * 0 : not equal
3685 */
3686static int
3687key_cmpspidx_withmask(
3688 struct secpolicyindex *spidx0,
3689 struct secpolicyindex *spidx1)
3690{
3691 /* sanity */
3692 if (spidx0 == NULL && spidx1 == NULL)
3693 return 1;
3694
3695 if (spidx0 == NULL || spidx1 == NULL)
3696 return 0;
3697
3698 if (spidx0->src.sa.sa_family != spidx1->src.sa.sa_family ||
3699 spidx0->dst.sa.sa_family != spidx1->dst.sa.sa_family ||
3700 spidx0->src.sa.sa_len != spidx1->src.sa.sa_len ||
3701 spidx0->dst.sa.sa_len != spidx1->dst.sa.sa_len)
3702 return 0;
3703
3704 /* if spidx.ul_proto == IPSEC_ULPROTO_ANY, ignore. */
3705 if (spidx0->ul_proto != (u_int16_t)IPSEC_ULPROTO_ANY
3706 && spidx0->ul_proto != spidx1->ul_proto)
3707 return 0;
3708
3709 switch (spidx0->src.sa.sa_family) {
3710 case AF_INET:
3711 if (spidx0->src.sin.sin_port != IPSEC_PORT_ANY
3712 && spidx0->src.sin.sin_port != spidx1->src.sin.sin_port)
3713 return 0;
3714 if (!key_bbcmp(&spidx0->src.sin.sin_addr,
3715 &spidx1->src.sin.sin_addr, spidx0->prefs))
3716 return 0;
3717 break;
3718 case AF_INET6:
3719 if (spidx0->src.sin6.sin6_port != IPSEC_PORT_ANY
3720 && spidx0->src.sin6.sin6_port != spidx1->src.sin6.sin6_port)
3721 return 0;
3722 /*
3723 * scope_id check. if sin6_scope_id is 0, we regard it
3724 * as a wildcard scope, which matches any scope zone ID.
3725 */
3726 if (spidx0->src.sin6.sin6_scope_id &&
3727 spidx1->src.sin6.sin6_scope_id &&
3728 spidx0->src.sin6.sin6_scope_id != spidx1->src.sin6.sin6_scope_id)
3729 return 0;
3730 if (!key_bbcmp(&spidx0->src.sin6.sin6_addr,
3731 &spidx1->src.sin6.sin6_addr, spidx0->prefs))
3732 return 0;
3733 break;
3734 default:
3735 /* XXX */
3736 if (bcmp(&spidx0->src, &spidx1->src, spidx0->src.sa.sa_len) != 0)
3737 return 0;
3738 break;
3739 }
3740
3741 switch (spidx0->dst.sa.sa_family) {
3742 case AF_INET:
3743 if (spidx0->dst.sin.sin_port != IPSEC_PORT_ANY
3744 && spidx0->dst.sin.sin_port != spidx1->dst.sin.sin_port)
3745 return 0;
3746 if (!key_bbcmp(&spidx0->dst.sin.sin_addr,
3747 &spidx1->dst.sin.sin_addr, spidx0->prefd))
3748 return 0;
3749 break;
3750 case AF_INET6:
3751 if (spidx0->dst.sin6.sin6_port != IPSEC_PORT_ANY
3752 && spidx0->dst.sin6.sin6_port != spidx1->dst.sin6.sin6_port)
3753 return 0;
3754 /*
3755 * scope_id check. if sin6_scope_id is 0, we regard it
3756 * as a wildcard scope, which matches any scope zone ID.
3757 */
926669dd
JH
3758 if (spidx0->dst.sin6.sin6_scope_id &&
3759 spidx1->dst.sin6.sin6_scope_id &&
984263bc
MD
3760 spidx0->dst.sin6.sin6_scope_id != spidx1->dst.sin6.sin6_scope_id)
3761 return 0;
3762 if (!key_bbcmp(&spidx0->dst.sin6.sin6_addr,
3763 &spidx1->dst.sin6.sin6_addr, spidx0->prefd))
3764 return 0;
3765 break;
3766 default:
3767 /* XXX */
3768 if (bcmp(&spidx0->dst, &spidx1->dst, spidx0->dst.sa.sa_len) != 0)
3769 return 0;
3770 break;
3771 }
3772
3773 /* XXX Do we check other field ? e.g. flowinfo */
3774
3775 return 1;
3776}
3777
3778/* returns 0 on match */
3779static int
3780key_sockaddrcmp(
3781 const struct sockaddr *sa1,
3782 const struct sockaddr *sa2,
3783 int port)
3784{
3785#ifdef satosin
3786#undef satosin
3787#endif
3788#define satosin(s) ((const struct sockaddr_in *)s)
3789#ifdef satosin6
3790#undef satosin6
3791#endif
3792#define satosin6(s) ((const struct sockaddr_in6 *)s)
3793 if (sa1->sa_family != sa2->sa_family || sa1->sa_len != sa2->sa_len)
3794 return 1;
3795
3796 switch (sa1->sa_family) {
3797 case AF_INET:
3798 if (sa1->sa_len != sizeof(struct sockaddr_in))
3799 return 1;
3800 if (satosin(sa1)->sin_addr.s_addr !=
3801 satosin(sa2)->sin_addr.s_addr) {
3802 return 1;
3803 }
3804 if (port && satosin(sa1)->sin_port != satosin(sa2)->sin_port)
3805 return 1;
3806 break;
3807 case AF_INET6:
3808 if (sa1->sa_len != sizeof(struct sockaddr_in6))
3809 return 1; /*EINVAL*/
3810 if (satosin6(sa1)->sin6_scope_id !=
3811 satosin6(sa2)->sin6_scope_id) {
3812 return 1;
3813 }
3814 if (!IN6_ARE_ADDR_EQUAL(&satosin6(sa1)->sin6_addr,
3815 &satosin6(sa2)->sin6_addr)) {
3816 return 1;
3817 }
3818 if (port &&
3819 satosin6(sa1)->sin6_port != satosin6(sa2)->sin6_port) {
3820 return 1;
3821 }
3822 default:
3823 if (bcmp(sa1, sa2, sa1->sa_len) != 0)
3824 return 1;
3825 break;
3826 }
3827
3828 return 0;
3829#undef satosin
3830#undef satosin6
3831}
3832
3833/*
3834 * compare two buffers with mask.
3835 * IN:
3836 * addr1: source
3837 * addr2: object
3838 * bits: Number of bits to compare
3839 * OUT:
3840 * 1 : equal
3841 * 0 : not equal
3842 */
3843static int
3844key_bbcmp(const void *a1, const void *a2, u_int bits)
3845{
3846 const unsigned char *p1 = a1;
3847 const unsigned char *p2 = a2;
3848
3849 /* XXX: This could be considerably faster if we compare a word
3850 * at a time, but it is complicated on LSB Endian machines */
3851
3852 /* Handle null pointers */
3853 if (p1 == NULL || p2 == NULL)
3854 return (p1 == p2);
3855
3856 while (bits >= 8) {
3857 if (*p1++ != *p2++)
3858 return 0;
3859 bits -= 8;
3860 }
3861
3862 if (bits > 0) {
3863 u_int8_t mask = ~((1<<(8-bits))-1);
3864 if ((*p1 & mask) != (*p2 & mask))
3865 return 0;
3866 }
3867 return 1; /* Match! */
3868}
3869
3870/*
3871 * time handler.
3872 * scanning SPD and SAD to check status for each entries,
3873 * and do to remove or to expire.
3874 * XXX: year 2038 problem may remain.
3875 */
3876void
bf844ffa 3877key_timehandler(void *unused)
984263bc
MD
3878{
3879 u_int dir;
984263bc 3880 time_t now = time_second;
cd52b1