ip_ipsp.h revision 1.70 
1/*	$OpenBSD: ip_ipsp.h,v 1.70 2000/09/19 03:20:59 angelos Exp $	*/
2
3/*
4 * The authors of this code are John Ioannidis (ji@tla.org),
5 * Angelos D. Keromytis (kermit@csd.uch.gr),
6 * Niels Provos (provos@physnet.uni-hamburg.de) and
7 * Niklas Hallqvist (niklas@appli.se).
8 *
9 * The original version of this code was written by John Ioannidis
10 * for BSD/OS in Athens, Greece, in November 1995.
11 *
12 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
13 * by Angelos D. Keromytis.
14 *
15 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
16 * and Niels Provos.
17 *
18 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist.
19 *
20 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
21 * Angelos D. Keromytis and Niels Provos.
22 * Copyright (c) 1999 Niklas Hallqvist.
23 *
24 * Permission to use, copy, and modify this software 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/*
44 * IPSP global definitions.
45 */
46
47#include <sys/types.h>
48#include <sys/queue.h>
49#include <netinet/in.h>
50
51union sockaddr_union
52{
53    struct sockaddr     sa;
54    struct sockaddr_in  sin;
55    struct sockaddr_in6 sin6;
56};
57
58/* HMAC key sizes */
59#define MD5HMAC96_KEYSIZE       16
60#define SHA1HMAC96_KEYSIZE      20
61#define RIPEMD160HMAC96_KEYSIZE 20
62
63#define AH_HMAC_HASHLEN		12	/* 96 bits of authenticator */
64#define AH_HMAC_RPLENGTH        4	/* 32 bits of replay counter */
65#define AH_HMAC_INITIAL_RPL	1	/* Replay counter initial value */
66
67/* Authenticator lengths */
68#define AH_MD5_ALEN		16
69#define AH_SHA1_ALEN		20
70#define AH_RMD160_ALEN		20
71#define AH_ALEN_MAX		20 	/* Keep updated */
72
73/* Reserved SPI numbers */
74#define SPI_LOCAL_USE		0
75#define SPI_RESERVED_MIN	1
76#define SPI_RESERVED_MAX	255
77
78/* sysctl default values */
79#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT	60	/* 1 minute */
80#define IPSEC_DEFAULT_PFS                       1
81#define IPSEC_DEFAULT_SOFT_ALLOCATIONS          0
82#define IPSEC_DEFAULT_EXP_ALLOCATIONS           0
83#define IPSEC_DEFAULT_SOFT_BYTES                0
84#define IPSEC_DEFAULT_EXP_BYTES                 0
85#define IPSEC_DEFAULT_SOFT_TIMEOUT              80000
86#define IPSEC_DEFAULT_EXP_TIMEOUT               86400
87#define IPSEC_DEFAULT_SOFT_FIRST_USE            3600
88#define IPSEC_DEFAULT_EXP_FIRST_USE             7200
89#define IPSEC_DEFAULT_DEF_ENC                   "3des"
90#define IPSEC_DEFAULT_DEF_AUTH                   "hmac-sha1"
91#define IPSEC_DEFAULT_EXPIRE_ACQUIRE            30
92
93struct sockaddr_encap
94{
95    u_int8_t	sen_len;		/* length */
96    u_int8_t	sen_family;		/* PF_KEY */
97    u_int16_t	sen_type;		/* see SENT_* */
98    union
99    {
100	struct				/* SENT_IP4 */
101	{
102	    u_int8_t Direction;
103	    struct in_addr Src;
104	    struct in_addr Dst;
105	    u_int8_t Proto;
106	    u_int16_t Sport;
107	    u_int16_t Dport;
108	} Sip4;
109
110	struct				/* SENT_IP6 */
111	{
112	    u_int8_t Direction;
113	    struct in6_addr Src;
114	    struct in6_addr Dst;
115	    u_int8_t Proto;
116	    u_int16_t Sport;
117	    u_int16_t Dport;
118	} Sip6;
119
120	struct ipsec_policy *PolicyHead;  /* SENT_IPSP */
121    } Sen;
122};
123
124#define IPSP_DIRECTION_IN     0x1
125#define IPSP_DIRECTION_OUT    0x2
126
127#define sen_data	  Sen.Data
128#define sen_ip_src	  Sen.Sip4.Src
129#define sen_ip_dst	  Sen.Sip4.Dst
130#define sen_proto	  Sen.Sip4.Proto
131#define sen_sport	  Sen.Sip4.Sport
132#define sen_dport	  Sen.Sip4.Dport
133#define sen_direction     Sen.Sip4.Direction
134#define sen_ip6_src	  Sen.Sip6.Src
135#define sen_ip6_dst	  Sen.Sip6.Dst
136#define sen_ip6_proto	  Sen.Sip6.Proto
137#define sen_ip6_sport	  Sen.Sip6.Sport
138#define sen_ip6_dport	  Sen.Sip6.Dport
139#define sen_ip6_direction Sen.Sip6.Direction
140#define sen_ipsp          Sen.PolicyHead
141
142/*
143 * The "type" is really part of the address as far as the routing
144 * system is concerned. By using only one bit in the type field
145 * for each type, we sort-of make sure that different types of
146 * encapsulation addresses won't be matched against the wrong type.
147 *
148 */
149
150#define SENT_IP4	0x0001		/* data is two struct in_addr */
151#define SENT_IPSP	0x0002		/* data as in IP4/6 plus SPI */
152#define SENT_IP6        0x0004
153
154#define SENT_LEN        sizeof(struct sockaddr_encap)
155
156struct ipsec_acquire
157{
158    union sockaddr_union ipa_addr;
159    u_int64_t            ipa_expire;
160    TAILQ_ENTRY(ipsec_acquire) ipa_next;
161};
162
163struct ipsec_policy
164{
165    struct sockaddr_encap ipo_addr;
166    struct sockaddr_encap ipo_mask;
167
168    union sockaddr_union ipo_src;   /* Local address to use */
169    union sockaddr_union ipo_dst;   /* Remote gateway -- if it's zeroed:
170				     * - on output, we try to contact the
171				     * remote host directly (if needed).
172				     * - on input, we accept on if the
173				     * inner source is the same as the
174				     * outer source address, or if transport
175				     * mode was used.
176				     */
177
178    u_int64_t            ipo_last_searched; /* Timestamp of last lookup */
179
180    u_int8_t             ipo_flags; /* See IPSP_POLICY_* definitions */
181    u_int8_t             ipo_type;  /* USE/ACQUIRE/... */
182    u_int8_t             ipo_sproto;/* ESP, AH; if zero we use system dflts */
183
184    struct tdb          *ipo_tdb;   /* Cached entry */
185
186    TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List of policies on TDB */
187    TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policy entries */
188};
189
190#define IPSP_POLICY_NONE    0x0000  /* No flags set */
191
192#define IPSP_IPSEC_USE      0 /* Use if existing, don't bother establishing */
193#define IPSP_IPSEC_ACQUIRE  1 /* Try to acquire in parallel but let packet */
194#define IPSP_IPSEC_REQUIRE  2 /* Require SA */
195#define IPSP_PERMIT         3 /* Permit traffic through */
196#define IPSP_DENY           4 /* Deny traffic */
197#define IPSP_IPSEC_DONTACQ  5 /* Require, but don't acquire */
198
199/* Notification types */
200#define NOTIFY_SOFT_EXPIRE      0       /* Soft expiration of SA */
201#define NOTIFY_HARD_EXPIRE      1       /* Hard expiration of SA */
202#define NOTIFY_REQUEST_SA       2       /* Establish an SA */
203
204#define NOTIFY_SATYPE_CONF      1       /* SA should do encryption */
205#define NOTIFY_SATYPE_AUTH      2       /* SA should do authentication */
206#define NOTIFY_SATYPE_TUNNEL    4       /* SA should use tunneling */
207
208/*
209 * For encapsulation routes are possible not only for the destination
210 * address but also for the protocol, source and destination ports
211 * if available
212 */
213
214struct route_enc {
215    struct rtentry *re_rt;
216    struct sockaddr_encap re_dst;
217};
218
219struct tdb				/* tunnel descriptor block */
220{
221    /*
222     * Each TDB is on three hash tables: one keyed on dst/spi/sproto,
223     * one keyed on dst/sproto, and one keyed on src/sproto. The first
224     * is used for finding a specific TDB, the second for finding TDBs
225     * TDBs for outgoing policy matching, and the third for incoming
226     * policy matching. The following three fields maintain the hash
227     * queues in those three tables.
228     */
229    struct tdb	     *tdb_hnext;   /* dst/spi/sproto table */
230    struct tdb       *tdb_anext;   /* dst/sproto table */
231    struct tdb       *tdb_snext;   /* src/sproto table */
232
233    struct xformsw   *tdb_xform;	/* Transformation to use */
234    struct enc_xform *tdb_encalgxform;  /* Encryption algorithm xform */
235    struct auth_hash *tdb_authalgxform; /* Authentication algorithm xform */
236
237#define TDBF_UNIQUE	      0x00001	/* This should not be used by others */
238#define TDBF_TIMER            0x00002	/* Absolute expiration timer in use */
239#define TDBF_BYTES            0x00004	/* Check the byte counters */
240#define TDBF_ALLOCATIONS      0x00008	/* Check the flows counters */
241#define TDBF_INVALID          0x00010	/* This SPI is not valid yet/anymore */
242#define TDBF_FIRSTUSE         0x00020	/* Expire after first use */
243#define TDBF_HALFIV           0x00040   /* Use half-length IV (ESP old only) */
244#define TDBF_SOFT_TIMER       0x00080	/* Soft expiration */
245#define TDBF_SOFT_BYTES       0x00100	/* Soft expiration */
246#define TDBF_SOFT_ALLOCATIONS 0x00200	/* Soft expiration */
247#define TDBF_SOFT_FIRSTUSE    0x00400	/* Soft expiration */
248#define TDBF_PFS              0x00800	/* Ask for PFS from Key Mgmt. */
249#define TDBF_TUNNELING        0x01000	/* Force IP-IP encapsulation */
250#define TDBF_NOREPLAY         0x02000   /* No replay counter present */
251#define TDBF_RANDOMPADDING    0x04000   /* Random data in the ESP padding */
252
253    u_int32_t	      tdb_flags;  	/* Flags related to this TDB */
254
255    TAILQ_ENTRY(tdb)  tdb_expnext;	/* Expiration cluster list link */
256    TAILQ_ENTRY(tdb)  tdb_explink;	/* Expiration ordered list link */
257
258    u_int32_t         tdb_exp_allocations;  /* Expire after so many flows */
259    u_int32_t         tdb_soft_allocations; /* Expiration warning */
260    u_int32_t         tdb_cur_allocations;  /* Total number of allocations */
261
262    u_int64_t         tdb_exp_bytes;    /* Expire after so many bytes passed */
263    u_int64_t         tdb_soft_bytes;	/* Expiration warning */
264    u_int64_t         tdb_cur_bytes;	/* Current count of bytes */
265
266    u_int64_t         tdb_exp_timeout;	/* When does the SPI expire */
267    u_int64_t         tdb_soft_timeout;	/* Send a soft-expire warning */
268    u_int64_t         tdb_established;	/* When was the SPI established */
269    u_int64_t	      tdb_timeout;	/* Next absolute expiration time.  */
270
271    u_int64_t	      tdb_first_use;	  /* When was it first used */
272    u_int64_t         tdb_soft_first_use; /* Soft warning */
273    u_int64_t         tdb_exp_first_use;  /* Expire if tdb_first_use +
274					   * tdb_exp_first_use <= curtime */
275    u_int64_t         tdb_cryptoid;     /* Crypto session ID */
276
277    u_int32_t	      tdb_spi;    	/* SPI */
278    u_int16_t         tdb_amxkeylen;    /* Raw authentication key length */
279    u_int16_t         tdb_emxkeylen;    /* Raw encryption key length */
280    u_int16_t         tdb_ivlen;        /* IV length */
281    u_int8_t	      tdb_sproto;	/* IPsec protocol */
282    u_int8_t          tdb_wnd;          /* Replay window */
283    u_int8_t          tdb_satype;       /* SA type (RFC2367, PF_KEY) */
284
285    union sockaddr_union tdb_dst;	/* Destination address for this SA */
286    union sockaddr_union tdb_src;	/* Source address for this SA */
287    union sockaddr_union tdb_proxy;
288
289    u_int8_t         *tdb_srcid;        /* Source ID for this SA */
290    u_int8_t         *tdb_dstid;        /* Destination ID for this SA */
291    u_int8_t         *tdb_amxkey;       /* Raw authentication key */
292    u_int8_t         *tdb_emxkey;       /* Raw encryption key */
293
294    u_int32_t         tdb_rpl;	        /* Replay counter */
295    u_int32_t         tdb_bitmap;       /* Used for replay sliding window */
296    u_int32_t         tdb_initial;	/* Initial replay value */
297
298    u_int32_t         tdb_epoch;	/* Used by the kernfs interface */
299    u_int16_t         tdb_srcid_len;
300    u_int16_t         tdb_dstid_len;
301    u_int16_t         tdb_srcid_type;
302    u_int16_t         tdb_dstid_type;
303
304    u_int8_t          tdb_iv[4];        /* Used for HALF-IV ESP */
305
306    caddr_t           tdb_interface;
307
308    TAILQ_HEAD(tdb_inp_head, inpcb) tdb_inp;
309    TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head;
310};
311
312struct tdb_ident {
313    u_int32_t spi;
314    union sockaddr_union dst;
315    u_int8_t proto;
316};
317
318struct tdb_crypto {
319    u_int32_t			tc_spi;
320    union sockaddr_union	tc_dst;
321    u_int8_t			tc_proto;
322    int                         tc_protoff;
323    int                         tc_skip;
324    caddr_t                     tc_ptr;
325};
326
327struct ipsecinit
328{
329    u_int8_t       *ii_enckey;
330    u_int8_t       *ii_authkey;
331    u_int16_t       ii_enckeylen;
332    u_int16_t       ii_authkeylen;
333    u_int8_t        ii_encalg;
334    u_int8_t        ii_authalg;
335};
336
337struct xformsw
338{
339    u_short		xf_type;	/* Unique ID of xform */
340    u_short		xf_flags;	/* flags (see below) */
341    char		*xf_name;	/* human-readable name */
342    int		(*xf_attach)(void);	/* called at config time */
343    int		(*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *);
344    int		(*xf_zeroize)(struct tdb *); /* termination */
345    int         (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */
346    int		(*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, int, int);        /* output */
347};
348
349/* xform IDs */
350#define XF_IP4		1	/* IP inside IP */
351#define XF_AH		2	/* AH */
352#define XF_ESP		3	/* ESP */
353#define XF_TCPSIGNATURE	5	/* TCP MD5 Signature option, RFC 2358 */
354
355/* xform attributes */
356#define XFT_AUTH	0x0001
357#define XFT_CONF	0x0100
358
359#define IPSEC_ZEROES_SIZE	256	/* Larger than an IP6 extension hdr. */
360#define IPSEC_KERNFS_BUFSIZE    4096
361
362#if BYTE_ORDER == LITTLE_ENDIAN
363static __inline u_int64_t
364htonq(u_int64_t q)
365{
366    register u_int32_t u, l;
367    u = q >> 32;
368    l = (u_int32_t) q;
369
370    return htonl(u) | ((u_int64_t)htonl(l) << 32);
371}
372
373#define ntohq(_x) htonq(_x)
374
375#elif BYTE_ORDER == BIG_ENDIAN
376
377#define htonq(_x) (_x)
378#define ntohq(_x) htonq(_x)
379
380#else
381#error  "Please fix <machine/endian.h>"
382#endif
383
384#ifdef _KERNEL
385
386/*
387 * Protects all tdb lists.
388 * Must at least be splsoftnet (note: do not use splsoftclock as it is
389 * special on some architectures, assuming it is always an spl lowering
390 * operation).
391 */
392#define spltdb	splsoftnet
393
394extern int encdebug;
395extern int ipsec_acl;
396extern int ipsec_keep_invalid;
397extern int ipsec_in_use;
398extern u_int64_t ipsec_last_added;
399extern int ipsec_require_pfs;
400extern int ipsec_expire_acquire;
401
402extern int ipsec_soft_allocations;
403extern int ipsec_exp_allocations;
404extern int ipsec_soft_bytes;
405extern int ipsec_exp_bytes;
406extern int ipsec_soft_timeout;
407extern int ipsec_exp_timeout;
408extern int ipsec_soft_first_use;
409extern int ipsec_exp_first_use;
410extern char ipsec_def_enc[];
411extern char ipsec_def_auth[];
412
413extern struct enc_xform enc_xform_des;
414extern struct enc_xform enc_xform_3des;
415extern struct enc_xform enc_xform_blf;
416extern struct enc_xform enc_xform_cast5;
417extern struct enc_xform enc_xform_skipjack;
418
419extern struct auth_hash auth_hash_hmac_md5_96;
420extern struct auth_hash auth_hash_hmac_sha1_96;
421extern struct auth_hash auth_hash_hmac_ripemd_160_96;
422
423extern TAILQ_HEAD(expclusterlist_head, tdb) expclusterlist;
424extern TAILQ_HEAD(explist_head, tdb) explist;
425extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head;
426extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head;
427
428extern struct xformsw xformsw[], *xformswNXFORMSW;
429
430/* Check if a given tdb has encryption, authentication and/or tunneling */
431#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0)| \
432		       ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0))
433
434/* Traverse spi chain and get attributes */
435
436#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\
437	int s = spltdb(); \
438	struct tdb *tmptdb = (TDBP); \
439	\
440	(have) = 0; \
441	while (tmptdb && tmptdb->tdb_xform) { \
442	        if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \
443	                break; \
444                (have) |= TDB_ATTRIB(tmptdb); \
445                tmptdb = tmptdb->TDB_DIR; \
446        } \
447	splx(s); \
448} while (0)
449
450/* Misc. */
451extern char *inet_ntoa4(struct in_addr);
452extern char *ipsp_address(union sockaddr_union);
453
454/* TDB management routines */
455extern void tdb_add_inp(struct tdb *tdb, struct inpcb *inp);
456extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *,
457			     union sockaddr_union *, u_int8_t, int *);
458extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t);
459extern struct tdb *gettdbbyaddr(union sockaddr_union *, u_int8_t,
460				struct mbuf *, int);
461extern struct tdb *gettdbbysrc(union sockaddr_union *, u_int8_t,
462			       struct mbuf *, int);
463extern void puttdb(struct tdb *);
464extern void tdb_delete(struct tdb *, int);
465extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *);
466extern void tdb_expiration(struct tdb *, int);
467/* Flag values for the last argument of tdb_expiration().  */
468#define TDBEXP_EARLY	1	/* The tdb is likely to end up early.  */
469#define TDBEXP_TIMEOUT	2	/* Maintain expiration timeout.  */
470extern int tdb_walk(int (*)(struct tdb *, void *), void *);
471extern void handle_expirations(void *);
472
473/* XF_IP4 */
474extern int ipe4_attach(void);
475extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *);
476extern int ipe4_zeroize(struct tdb *);
477extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
478extern void ipe4_input __P((struct mbuf *, ...));
479extern void ipip_input __P((struct mbuf *, int));
480
481#ifdef INET
482extern void ip4_input __P((struct mbuf *, ...));
483#endif /* INET */
484
485#ifdef INET6
486extern int ip4_input6 __P((struct mbuf **, int *, int));
487#endif /* INET */
488
489/* XF_ETHERIP */
490extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **,
491			  int, int);
492extern void etherip_input __P((struct mbuf *, ...));
493
494/* XF_AH */
495extern int ah_attach(void);
496extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *);
497extern int ah_zeroize(struct tdb *);
498extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
499extern int ah_output_cb(void *);
500extern int ah_input(struct mbuf *, struct tdb *, int, int);
501extern int ah_input_cb(void *);
502extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t);
503extern int ah_massage_headers(struct mbuf **, int, int, int, int);
504
505#ifdef INET
506extern void ah4_input __P((struct mbuf *, ...));
507extern int ah4_input_cb __P((struct mbuf *, ...));
508#endif /* INET */
509
510#ifdef INET6
511extern int ah6_input __P((struct mbuf **, int *, int));
512extern int ah6_input_cb __P((struct mbuf *, int, int));
513#endif /* INET6 */
514
515/* XF_ESP */
516extern int esp_attach(void);
517extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *);
518extern int esp_zeroize(struct tdb *);
519extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int);
520extern int esp_output_cb(void *);
521extern int esp_input(struct mbuf *, struct tdb *, int, int);
522extern int esp_input_cb(void *);
523extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
524
525#ifdef INET
526extern void esp4_input __P((struct mbuf *, ...));
527extern int esp4_input_cb __P((struct mbuf *, ...));
528#endif /* INET */
529
530#ifdef INET6
531extern int esp6_input __P((struct mbuf **, int *, int));
532extern int esp6_input_cb __P((struct mbuf *, int, int));
533#endif /* INET6 */
534
535/* XF_TCPSIGNATURE */
536extern int tcp_signature_tdb_attach __P((void));
537extern int tcp_signature_tdb_init __P((struct tdb *, struct xformsw *,
538				       struct ipsecinit *));
539extern int tcp_signature_tdb_zeroize __P((struct tdb *));
540extern int tcp_signature_tdb_input __P((struct mbuf *, struct tdb *, int,
541					int));
542extern int tcp_signature_tdb_output __P((struct mbuf *, struct tdb *,
543					 struct mbuf **, int, int));
544
545/* Padding */
546extern caddr_t m_pad(struct mbuf *, int);
547
548/* Replay window */
549extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t,
550                               u_int32_t *);
551
552extern unsigned char ipseczeroes[];
553
554/* Packet processing */
555extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int);
556extern int ipsp_process_done(struct mbuf *, struct tdb *);
557extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int,
558                                   struct tdb *, struct inpcb *);
559extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int);
560extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *,
561			   union sockaddr_union *);
562extern struct ipsec_policy *ipsec_add_policy(struct sockaddr_encap *,
563					     struct sockaddr_encap *,
564					     union sockaddr_union *, int, int);
565extern int ipsp_match_policy(struct tdb *, struct ipsec_policy *,
566			     struct mbuf *, int);
567extern void ipsp_acquire_expirations(void *);
568extern int ipsec_delete_policy(struct ipsec_policy *);
569#endif /* _KERNEL */
570#endif /* _NETINET_IPSP_H_ */
571