1 /* $OpenBSD: ip_ipsp.h,v 1.131 2005/11/24 12:08:16 pedro Exp $ */
2 /*
3 * The authors of this code are John Ioannidis (ji@tla.org),
4 * Angelos D. Keromytis (kermit@csd.uch.gr),
5 * Niels Provos (provos@physnet.uni-hamburg.de) and
6 * Niklas Hallqvist (niklas@appli.se).
7 *
8 * The original version of this code was written by John Ioannidis
9 * for BSD/OS in Athens, Greece, in November 1995.
10 *
11 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
12 * by Angelos D. Keromytis.
13 *
14 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
15 * and Niels Provos.
16 *
17 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist.
18 *
19 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
20 * Angelos D. Keromytis and Niels Provos.
21 * Copyright (c) 1999 Niklas Hallqvist.
22 * Copyright (c) 2001, Angelos D. Keromytis.
23 *
24 * Permission to use, copy, and modify this software with or without fee
25 * is hereby granted, provided that this entire notice is included in
26 * all copies of any software which is or includes a copy or
27 * modification of this software.
28 * You may use this code under the GNU public license if you so wish. Please
29 * contribute changes back to the authors under this freer than GPL license
30 * so that we may further the use of strong encryption without limitations to
31 * all.
32 *
33 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
34 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
35 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
36 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
37 * PURPOSE.
38 */
39
40 #ifndef _NETINET_IPSP_H_
41 #define _NETINET_IPSP_H_
42
43 /* IPSP global definitions. */
44
45 #include <sys/types.h>
46 #include <sys/queue.h>
47 #include <sys/timeout.h>
48 #include <netinet/in.h>
49
50 union sockaddr_union {
51 struct sockaddr sa;
52 struct sockaddr_in sin;
53 struct sockaddr_in6 sin6;
54 };
55
56 /* HMAC key sizes */
57 #define MD5HMAC96_KEYSIZE 16
58 #define SHA1HMAC96_KEYSIZE 20
59 #define RIPEMD160HMAC96_KEYSIZE 20
60 #define SHA2_256HMAC96_KEYSIZE 32
61 #define SHA2_384HMAC96_KEYSIZE 48
62 #define SHA2_512HMAC96_KEYSIZE 64
63
64 #define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */
65 #define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */
66 #define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */
67
68 /* Authenticator lengths */
69 #define AH_MD5_ALEN 16
70 #define AH_SHA1_ALEN 20
71 #define AH_RMD160_ALEN 20
72 #define AH_SHA2_256_ALEN 32
73 #define AH_SHA2_384_ALEN 48
74 #define AH_SHA2_512_ALEN 64
75 #define AH_ALEN_MAX 64 /* Keep updated */
76
77 /* Reserved SPI numbers */
78 #define SPI_LOCAL_USE 0
79 #define SPI_RESERVED_MIN 1
80 #define SPI_RESERVED_MAX 255
81
82 /* Reserved CPI numbers */
83 #define CPI_RESERVED_MIN 1
84 #define CPI_RESERVED_MAX 255
85 #define CPI_PRIVATE_MIN 61440
86 #define CPI_PRIVATE_MAX 65535
87
88 /* sysctl default values */
89 #define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */
90 #define IPSEC_DEFAULT_PFS 1
91 #define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0
92 #define IPSEC_DEFAULT_EXP_ALLOCATIONS 0
93 #define IPSEC_DEFAULT_SOFT_BYTES 0
94 #define IPSEC_DEFAULT_EXP_BYTES 0
95 #define IPSEC_DEFAULT_SOFT_TIMEOUT 80000
96 #define IPSEC_DEFAULT_EXP_TIMEOUT 86400
97 #define IPSEC_DEFAULT_SOFT_FIRST_USE 3600
98 #define IPSEC_DEFAULT_EXP_FIRST_USE 7200
99 #define IPSEC_DEFAULT_DEF_ENC "aes"
100 #define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1"
101 #define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30
102 #define IPSEC_DEFAULT_DEF_COMP "deflate"
103
104 struct sockaddr_encap {
105 u_int8_t sen_len; /* length */
106 u_int8_t sen_family; /* PF_KEY */
107 u_int16_t sen_type; /* see SENT_* */
108 union {
109 struct { /* SENT_IP4 */
110 u_int8_t Direction;
111 struct in_addr Src;
112 struct in_addr Dst;
113 u_int8_t Proto;
114 u_int16_t Sport;
115 u_int16_t Dport;
116 } Sip4;
117
118 struct { /* SENT_IP6 */
119 u_int8_t Direction;
120 struct in6_addr Src;
121 struct in6_addr Dst;
122 u_int8_t Proto;
123 u_int16_t Sport;
124 u_int16_t Dport;
125 } Sip6;
126
127 struct ipsec_policy *PolicyHead; /* SENT_IPSP */
128 } Sen;
129 };
130
131 #define IPSP_DIRECTION_IN 0x1
132 #define IPSP_DIRECTION_OUT 0x2
133
134 #define sen_data Sen.Data
135 #define sen_ip_src Sen.Sip4.Src
136 #define sen_ip_dst Sen.Sip4.Dst
137 #define sen_proto Sen.Sip4.Proto
138 #define sen_sport Sen.Sip4.Sport
139 #define sen_dport Sen.Sip4.Dport
140 #define sen_direction Sen.Sip4.Direction
141 #define sen_ip6_src Sen.Sip6.Src
142 #define sen_ip6_dst Sen.Sip6.Dst
143 #define sen_ip6_proto Sen.Sip6.Proto
144 #define sen_ip6_sport Sen.Sip6.Sport
145 #define sen_ip6_dport Sen.Sip6.Dport
146 #define sen_ip6_direction Sen.Sip6.Direction
147 #define sen_ipsp Sen.PolicyHead
148
149 /*
150 * The "type" is really part of the address as far as the routing
151 * system is concerned. By using only one bit in the type field
152 * for each type, we sort-of make sure that different types of
153 * encapsulation addresses won't be matched against the wrong type.
154 *
155 */
156
157 #define SENT_IP4 0x0001 /* data is two struct in_addr */
158 #define SENT_IPSP 0x0002 /* data as in IP4/6 plus SPI */
159 #define SENT_IP6 0x0004
160
161 #define SENT_LEN sizeof(struct sockaddr_encap)
162
163 struct ipsec_ref {
164 u_int16_t ref_type; /* Subtype of data */
165 int16_t ref_len; /* Length of data following */
166 int ref_count; /* Reference count */
167 int ref_malloctype; /* malloc(9) type, for freeing */
168 };
169
170 struct ipsec_acquire {
171 union sockaddr_union ipa_addr;
172 u_int32_t ipa_seq;
173 struct sockaddr_encap ipa_info;
174 struct sockaddr_encap ipa_mask;
175 struct timeout ipa_timeout;
176 struct ipsec_policy *ipa_policy;
177 struct inpcb *ipa_pcb;
178 TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next;
179 TAILQ_ENTRY(ipsec_acquire) ipa_next;
180 TAILQ_ENTRY(ipsec_acquire) ipa_inp_next;
181 };
182
183 struct ipsec_policy {
184 struct sockaddr_encap ipo_addr;
185 struct sockaddr_encap ipo_mask;
186
187 union sockaddr_union ipo_src; /* Local address to use */
188 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed:
189 * - on output, we try to
190 * contact the remote host
191 * directly (if needed).
192 * - on input, we accept on if
193 * the inner source is the
194 * same as the outer source
195 * address, or if transport
196 * mode was used.
197 */
198
199 u_int64_t ipo_last_searched; /* Timestamp of last lookup */
200
201 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */
202 u_int8_t ipo_type; /* USE/ACQUIRE/... */
203 u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */
204
205 int ipo_ref_count;
206
207 struct tdb *ipo_tdb; /* Cached entry */
208
209 struct ipsec_ref *ipo_srcid;
210 struct ipsec_ref *ipo_dstid;
211 struct ipsec_ref *ipo_local_cred;
212 struct ipsec_ref *ipo_local_auth;
213
214 TAILQ_HEAD(ipo_acquires_head, ipsec_acquire) ipo_acquires; /* List of acquires */
215 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List TDB policies */
216 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */
217 };
218
219 #define IPSP_POLICY_NONE 0x0000 /* No flags set */
220 #define IPSP_POLICY_SOCKET 0x0001 /* Socket-attached policy */
221 #define IPSP_POLICY_STATIC 0x0002 /* Static policy */
222
223 #define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */
224 #define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */
225 #define IPSP_IPSEC_REQUIRE 2 /* Require SA */
226 #define IPSP_PERMIT 3 /* Permit traffic through */
227 #define IPSP_DENY 4 /* Deny traffic */
228 #define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */
229
230 /* Notification types */
231 #define NOTIFY_SOFT_EXPIRE 0 /* Soft expiration of SA */
232 #define NOTIFY_HARD_EXPIRE 1 /* Hard expiration of SA */
233 #define NOTIFY_REQUEST_SA 2 /* Establish an SA */
234
235 #define NOTIFY_SATYPE_CONF 1 /* SA should do encryption */
236 #define NOTIFY_SATYPE_AUTH 2 /* SA should do authentication */
237 #define NOTIFY_SATYPE_TUNNEL 4 /* SA should use tunneling */
238 #define NOTIFY_SATYPE_COMP 5 /* SA (IPCA) should use compression */
239
240 /* Authentication types */
241 #define IPSP_AUTH_NONE 0
242 #define IPSP_AUTH_PASSPHRASE 1
243 #define IPSP_AUTH_RSA 2
244
245 /* Credential types */
246 #define IPSP_CRED_NONE 0
247 #define IPSP_CRED_KEYNOTE 1
248 #define IPSP_CRED_X509 2
249
250 /* Identity types */
251 #define IPSP_IDENTITY_NONE 0
252 #define IPSP_IDENTITY_PREFIX 1
253 #define IPSP_IDENTITY_FQDN 2
254 #define IPSP_IDENTITY_USERFQDN 3
255 #define IPSP_IDENTITY_CONNECTION 4
256
257 /*
258 * For encapsulation routes are possible not only for the destination
259 * address but also for the protocol, source and destination ports
260 * if available
261 */
262
263 struct route_enc {
264 struct rtentry *re_rt;
265 struct sockaddr_encap re_dst;
266 };
267
268 struct tdb { /* tunnel descriptor block */
269 /*
270 * Each TDB is on three hash tables: one keyed on dst/spi/sproto,
271 * one keyed on dst/sproto, and one keyed on src/sproto. The first
272 * is used for finding a specific TDB, the second for finding TDBs
273 * TDBs for outgoing policy matching, and the third for incoming
274 * policy matching. The following three fields maintain the hash
275 * queues in those three tables.
276 */
277 struct tdb *tdb_hnext; /* dst/spi/sproto table */
278 struct tdb *tdb_anext; /* dst/sproto table */
279 struct tdb *tdb_snext; /* src/sproto table */
280 struct tdb *tdb_inext;
281 struct tdb *tdb_onext;
282
283 struct xformsw *tdb_xform; /* Transform to use */
284 struct enc_xform *tdb_encalgxform; /* Enc algorithm */
285 struct auth_hash *tdb_authalgxform; /* Auth algorithm */
286 struct comp_algo *tdb_compalgxform; /* Compression algo */
287
288 #define TDBF_UNIQUE 0x00001 /* This should not be used by others */
289 #define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */
290 #define TDBF_BYTES 0x00004 /* Check the byte counters */
291 #define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */
292 #define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */
293 #define TDBF_FIRSTUSE 0x00020 /* Expire after first use */
294 #define TDBF_HALFIV 0x00040 /* Use half-length IV (ESP old only) */
295 #define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */
296 #define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */
297 #define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */
298 #define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */
299 #define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */
300 #define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */
301 #define TDBF_NOREPLAY 0x02000 /* No replay counter present */
302 #define TDBF_RANDOMPADDING 0x04000 /* Random data in the ESP padding */
303 #define TDBF_SKIPCRYPTO 0x08000 /* Skip actual crypto processing */
304 #define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */
305 #define TDBF_UDPENCAP 0x20000 /* UDP encapsulation */
306
307 u_int32_t tdb_flags; /* Flags related to this TDB */
308
309 struct timeout tdb_timer_tmo;
310 struct timeout tdb_first_tmo;
311 struct timeout tdb_stimer_tmo;
312 struct timeout tdb_sfirst_tmo;
313
314 u_int32_t tdb_seq; /* Tracking number for PFKEY */
315 u_int32_t tdb_exp_allocations; /* Expire after so many flows */
316 u_int32_t tdb_soft_allocations; /* Expiration warning */
317 u_int32_t tdb_cur_allocations; /* Total number of allocs */
318
319 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */
320 u_int64_t tdb_soft_bytes; /* Expiration warning */
321 u_int64_t tdb_cur_bytes; /* Current count of bytes */
322
323 u_int64_t tdb_exp_timeout; /* When does the SPI expire */
324 u_int64_t tdb_soft_timeout; /* Send soft-expire warning */
325 u_int64_t tdb_established; /* When was SPI established */
326
327 u_int64_t tdb_first_use; /* When was it first used */
328 u_int64_t tdb_soft_first_use; /* Soft warning */
329 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use +
330 * tdb_exp_first_use <= curtime
331 */
332
333 u_int64_t tdb_last_used; /* When was this SA last used */
334 u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */
335
336 u_int64_t tdb_cryptoid; /* Crypto session ID */
337
338 u_int32_t tdb_spi; /* SPI */
339 u_int16_t tdb_amxkeylen; /* Raw authentication key length */
340 u_int16_t tdb_emxkeylen; /* Raw encryption key length */
341 u_int16_t tdb_ivlen; /* IV length */
342 u_int8_t tdb_sproto; /* IPsec protocol */
343 u_int8_t tdb_wnd; /* Replay window */
344 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */
345
346 union sockaddr_union tdb_dst; /* Destination address */
347 union sockaddr_union tdb_src; /* Source address */
348 union sockaddr_union tdb_proxy;
349
350 u_int8_t *tdb_amxkey; /* Raw authentication key */
351 u_int8_t *tdb_emxkey; /* Raw encryption key */
352
353 u_int32_t tdb_rpl; /* Replay counter */
354 u_int32_t tdb_bitmap; /* Used for replay sliding window */
355
356 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */
357
358 struct ipsec_ref *tdb_local_cred;
359 struct ipsec_ref *tdb_remote_cred;
360 struct ipsec_ref *tdb_srcid; /* Source ID for this SA */
361 struct ipsec_ref *tdb_dstid; /* Destination ID for this SA */
362 struct ipsec_ref *tdb_local_auth;/* Local authentication material */
363 struct ipsec_ref *tdb_remote_auth;/* Remote authentication material */
364
365 u_int32_t tdb_mtu; /* MTU at this point in the chain */
366 u_int64_t tdb_mtutimeout; /* When to ignore this entry */
367
368 u_int16_t tdb_udpencap_port; /* Peer UDP port */
369
370 struct sockaddr_encap tdb_filter; /* What traffic is acceptable */
371 struct sockaddr_encap tdb_filtermask; /* And the mask */
372
373 TAILQ_HEAD(tdb_inp_head_in, inpcb) tdb_inp_in;
374 TAILQ_HEAD(tdb_inp_head_out, inpcb) tdb_inp_out;
375 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head;
376 };
377
378 struct tdb_ident {
379 u_int32_t spi;
380 union sockaddr_union dst;
381 u_int8_t proto;
382 };
383
384 struct tdb_crypto {
385 u_int32_t tc_spi;
386 union sockaddr_union tc_dst;
387 u_int8_t tc_proto;
388 int tc_protoff;
389 int tc_skip;
390 caddr_t tc_ptr;
391 };
392
393 struct ipsecinit {
394 u_int8_t *ii_enckey;
395 u_int8_t *ii_authkey;
396 u_int16_t ii_enckeylen;
397 u_int16_t ii_authkeylen;
398 u_int8_t ii_encalg;
399 u_int8_t ii_authalg;
400 u_int8_t ii_compalg;
401 };
402
403 /* xform IDs */
404 #define XF_IP4 1 /* IP inside IP */
405 #define XF_AH 2 /* AH */
406 #define XF_ESP 3 /* ESP */
407 #define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */
408 #define XF_IPCOMP 6 /* IPCOMP */
409
410 /* xform attributes */
411 #define XFT_AUTH 0x0001
412 #define XFT_CONF 0x0100
413 #define XFT_COMP 0x1000
414
415 #define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */
416
417 #if BYTE_ORDER == LITTLE_ENDIAN
418 static __inline u_int64_t
htonq(u_int64_t q)419 htonq(u_int64_t q)
420 {
421 u_int32_t u, l;
422 u = q >> 32;
423 l = (u_int32_t) q;
424
425 return htonl(u) | ((u_int64_t)htonl(l) << 32);
426 }
427
428 #define ntohq(_x) htonq(_x)
429
430 #elif BYTE_ORDER == BIG_ENDIAN
431
432 #define htonq(_x) (_x)
433 #define ntohq(_x) htonq(_x)
434
435 #else
436 #error "Please fix <machine/endian.h>"
437 #endif
438
439 #ifdef _KERNEL
440
441 struct xformsw {
442 u_short xf_type; /* Unique ID of xform */
443 u_short xf_flags; /* flags (see below) */
444 char *xf_name; /* human-readable name */
445 int (*xf_attach)(void); /* called at config time */
446 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *);
447 int (*xf_zeroize)(struct tdb *); /* termination */
448 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */
449 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **,
450 int, int); /* output */
451 };
452
453 /*
454 * Protects all tdb lists.
455 * Must at least be splsoftnet (note: do not use splsoftclock as it is
456 * special on some architectures, assuming it is always an spl lowering
457 * operation).
458 */
459 #define spltdb splsoftnet
460
461 extern int encdebug;
462 extern int ipsec_acl;
463 extern int ipsec_keep_invalid;
464 extern int ipsec_in_use;
465 extern u_int64_t ipsec_last_added;
466 extern int ipsec_require_pfs;
467 extern int ipsec_expire_acquire;
468
469 extern int ipsec_policy_pool_initialized;
470
471 extern int ipsec_soft_allocations;
472 extern int ipsec_exp_allocations;
473 extern int ipsec_soft_bytes;
474 extern int ipsec_exp_bytes;
475 extern int ipsec_soft_timeout;
476 extern int ipsec_exp_timeout;
477 extern int ipsec_soft_first_use;
478 extern int ipsec_exp_first_use;
479 extern char ipsec_def_enc[];
480 extern char ipsec_def_auth[];
481 extern char ipsec_def_comp[];
482
483 extern struct enc_xform enc_xform_des;
484 extern struct enc_xform enc_xform_3des;
485 extern struct enc_xform enc_xform_blf;
486 extern struct enc_xform enc_xform_cast5;
487 extern struct enc_xform enc_xform_skipjack;
488
489 extern struct auth_hash auth_hash_hmac_md5_96;
490 extern struct auth_hash auth_hash_hmac_sha1_96;
491 extern struct auth_hash auth_hash_hmac_ripemd_160_96;
492
493 extern struct comp_algo comp_algo_deflate;
494
495 extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head;
496 extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head;
497
498 extern struct xformsw xformsw[], *xformswNXFORMSW;
499
500 /* Check if a given tdb has encryption, authentication and/or tunneling */
501 #define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0) | \
502 ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0) | \
503 ((x)->tdb_compalgxform ? NOTIFY_SATYPE_COMP : 0))
504
505 /* Traverse spi chain and get attributes */
506
507 #define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\
508 int s = spltdb(); \
509 struct tdb *tmptdb = (TDBP); \
510 \
511 (have) = 0; \
512 while (tmptdb && tmptdb->tdb_xform) { \
513 if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \
514 break; \
515 (have) |= TDB_ATTRIB(tmptdb); \
516 tmptdb = tmptdb->TDB_DIR; \
517 } \
518 splx(s); \
519 } while (0)
520
521 /* Misc. */
522 extern char *inet_ntoa4(struct in_addr);
523 extern char *ipsp_address(union sockaddr_union);
524
525 /* TDB management routines */
526 extern void tdb_add_inp(struct tdb *, struct inpcb *, int);
527 extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *,
528 union sockaddr_union *, u_int8_t, int *);
529 extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t);
530 extern struct tdb *gettdbbyaddr(union sockaddr_union *, u_int8_t,
531 struct ipsec_ref *, struct ipsec_ref *, struct ipsec_ref *,
532 struct mbuf *, int, struct sockaddr_encap *, struct sockaddr_encap *);
533 extern struct tdb *gettdbbysrc(union sockaddr_union *, u_int8_t,
534 struct ipsec_ref *, struct ipsec_ref *, struct mbuf *, int,
535 struct sockaddr_encap *, struct sockaddr_encap *);
536 extern struct tdb *gettdbbysrcdst(u_int32_t, union sockaddr_union *,
537 union sockaddr_union *, u_int8_t);
538 extern void puttdb(struct tdb *);
539 extern void tdb_delete(struct tdb *);
540 extern struct tdb *tdb_alloc(void);
541 extern void tdb_free(struct tdb *);
542 extern int tdb_hash(u_int32_t, union sockaddr_union *, u_int8_t);
543 extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *);
544 extern int tdb_walk(int (*)(struct tdb *, void *, int), void *);
545
546 /* XF_IP4 */
547 extern int ipe4_attach(void);
548 extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *);
549 extern int ipe4_zeroize(struct tdb *);
550 extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
551 extern void ipe4_input(struct mbuf *, ...);
552 extern void ipip_input(struct mbuf *, int, struct ifnet *);
553
554 #ifdef INET
555 extern void ip4_input(struct mbuf *, ...);
556 #endif /* INET */
557
558 #ifdef INET6
559 extern int ip4_input6(struct mbuf **, int *, int);
560 #endif /* INET */
561
562 /* XF_ETHERIP */
563 extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **,
564 int, int);
565 extern void etherip_input(struct mbuf *, ...);
566
567 /* XF_AH */
568 extern int ah_attach(void);
569 extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *);
570 extern int ah_zeroize(struct tdb *);
571 extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
572 extern int ah_output_cb(void *);
573 extern int ah_input(struct mbuf *, struct tdb *, int, int);
574 extern int ah_input_cb(void *);
575 extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t);
576 extern int ah_massage_headers(struct mbuf **, int, int, int, int);
577
578 #ifdef INET
579 extern void ah4_input(struct mbuf *, ...);
580 extern int ah4_input_cb(struct mbuf *, ...);
581 extern void *ah4_ctlinput(int, struct sockaddr *, void *);
582 #endif /* INET */
583
584 #ifdef INET6
585 extern int ah6_input(struct mbuf **, int *, int);
586 extern int ah6_input_cb(struct mbuf *, int, int);
587 #endif /* INET6 */
588
589 /* XF_ESP */
590 extern int esp_attach(void);
591 extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *);
592 extern int esp_zeroize(struct tdb *);
593 extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
594 extern int esp_output_cb(void *);
595 extern int esp_input(struct mbuf *, struct tdb *, int, int);
596 extern int esp_input_cb(void *);
597 extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
598
599 #ifdef INET
600 extern void esp4_input(struct mbuf *, ...);
601 extern int esp4_input_cb(struct mbuf *, ...);
602 extern void *esp4_ctlinput(int, struct sockaddr *, void *);
603 #endif /* INET */
604
605 #ifdef INET6
606 extern int esp6_input(struct mbuf **, int *, int);
607 extern int esp6_input_cb(struct mbuf *, int, int);
608 #endif /* INET6 */
609
610 /* XF_IPCOMP */
611 extern int ipcomp_attach(void);
612 extern int ipcomp_init(struct tdb *, struct xformsw *, struct ipsecinit *);
613 extern int ipcomp_zeroize(struct tdb *);
614 extern int ipcomp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
615 extern int ipcomp_output_cb(void *);
616 extern int ipcomp_input(struct mbuf *, struct tdb *, int, int);
617 extern int ipcomp_input_cb(void *);
618 extern int ipcomp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
619
620 #ifdef INET
621 extern void ipcomp4_input(struct mbuf *, ...);
622 extern int ipcomp4_input_cb(struct mbuf *, ...);
623 #endif /* INET */
624
625 #ifdef INET6
626 extern int ipcomp6_input(struct mbuf **, int *, int);
627 extern int ipcomp6_input_cb(struct mbuf *, int, int);
628 #endif /* INET6 */
629
630 /* XF_TCPSIGNATURE */
631 extern int tcp_signature_tdb_attach(void);
632 extern int tcp_signature_tdb_init(struct tdb *, struct xformsw *,
633 struct ipsecinit *);
634 extern int tcp_signature_tdb_zeroize(struct tdb *);
635 extern int tcp_signature_tdb_input(struct mbuf *, struct tdb *, int,
636 int);
637 extern int tcp_signature_tdb_output(struct mbuf *, struct tdb *,
638 struct mbuf **, int, int);
639
640 /* Padding */
641 extern caddr_t m_pad(struct mbuf *, int);
642
643 /* Replay window */
644 extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t,
645 u_int32_t *, int);
646
647 extern unsigned char ipseczeroes[];
648
649 /* Packet processing */
650 extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int);
651 extern int ipsp_process_done(struct mbuf *, struct tdb *);
652 extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int,
653 struct tdb *, struct inpcb *);
654 extern struct tdb *ipsp_spd_inp(struct mbuf *, int, int, int *, int,
655 struct tdb *, struct inpcb *, struct ipsec_policy *);
656 extern int ipsec_common_input(struct mbuf *, int, int, int, int, int);
657 extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int,
658 struct m_tag *);
659 extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *,
660 union sockaddr_union *, struct sockaddr_encap *, struct mbuf *);
661 extern struct ipsec_policy *ipsec_add_policy(struct inpcb *, int, int);
662 extern void ipsec_update_policy(struct inpcb *, struct ipsec_policy *,
663 int, int);
664 extern int ipsec_delete_policy(struct ipsec_policy *);
665 extern struct ipsec_acquire *ipsp_pending_acquire(struct ipsec_policy *,
666 union sockaddr_union *);
667 extern void ipsp_delete_acquire(void *);
668 extern int ipsp_is_unspecified(union sockaddr_union);
669 extern void ipsp_reffree(struct ipsec_ref *);
670 extern void ipsp_skipcrypto_unmark(struct tdb_ident *);
671 extern void ipsp_skipcrypto_mark(struct tdb_ident *);
672 extern struct m_tag *ipsp_parse_headers(struct mbuf *, int, u_int8_t);
673 extern int ipsp_ref_match(struct ipsec_ref *, struct ipsec_ref *);
674 extern ssize_t ipsec_hdrsz(struct tdb *);
675 extern void ipsec_adjust_mtu(struct mbuf *, u_int32_t);
676 extern int ipsp_print_tdb(struct tdb *, char *, size_t);
677 extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t);
678 extern int ipsp_aux_match(struct tdb *,
679 struct ipsec_ref *, struct ipsec_ref *,
680 struct ipsec_ref *, struct ipsec_ref *,
681 struct sockaddr_encap *, struct sockaddr_encap *);
682 #endif /* _KERNEL */
683 #endif /* _NETINET_IPSP_H_ */
684