ip_ipsp.h revision 1.84 
1/*	$OpenBSD: ip_ipsp.h,v 1.84 2001/05/01 18:31:35 fgsch 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 <sys/timeout.h>
50#include <netinet/in.h>
51
52union sockaddr_union
53{
54    struct sockaddr     sa;
55    struct sockaddr_in  sin;
56    struct sockaddr_in6 sin6;
57};
58
59/* HMAC key sizes */
60#define MD5HMAC96_KEYSIZE       16
61#define SHA1HMAC96_KEYSIZE      20
62#define RIPEMD160HMAC96_KEYSIZE 20
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_ALEN_MAX		20 	/* Keep updated */
73
74/* Reserved SPI numbers */
75#define SPI_LOCAL_USE		0
76#define SPI_RESERVED_MIN	1
77#define SPI_RESERVED_MAX	255
78
79/* sysctl default values */
80#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT	60	/* 1 minute */
81#define IPSEC_DEFAULT_PFS                       1
82#define IPSEC_DEFAULT_SOFT_ALLOCATIONS          0
83#define IPSEC_DEFAULT_EXP_ALLOCATIONS           0
84#define IPSEC_DEFAULT_SOFT_BYTES                0
85#define IPSEC_DEFAULT_EXP_BYTES                 0
86#define IPSEC_DEFAULT_SOFT_TIMEOUT              80000
87#define IPSEC_DEFAULT_EXP_TIMEOUT               86400
88#define IPSEC_DEFAULT_SOFT_FIRST_USE            3600
89#define IPSEC_DEFAULT_EXP_FIRST_USE             7200
90#define IPSEC_DEFAULT_DEF_ENC                   "aes"
91#define IPSEC_DEFAULT_DEF_AUTH                   "hmac-sha1"
92#define IPSEC_DEFAULT_EXPIRE_ACQUIRE            30
93
94struct sockaddr_encap
95{
96    u_int8_t	sen_len;		/* length */
97    u_int8_t	sen_family;		/* PF_KEY */
98    u_int16_t	sen_type;		/* see SENT_* */
99    union
100    {
101	struct				/* SENT_IP4 */
102	{
103	    u_int8_t Direction;
104	    struct in_addr Src;
105	    struct in_addr Dst;
106	    u_int8_t Proto;
107	    u_int16_t Sport;
108	    u_int16_t Dport;
109	} Sip4;
110
111	struct				/* SENT_IP6 */
112	{
113	    u_int8_t Direction;
114	    struct in6_addr Src;
115	    struct in6_addr Dst;
116	    u_int8_t Proto;
117	    u_int16_t Sport;
118	    u_int16_t Dport;
119	} Sip6;
120
121	struct ipsec_policy *PolicyHead;  /* SENT_IPSP */
122    } Sen;
123};
124
125#define IPSP_DIRECTION_IN     0x1
126#define IPSP_DIRECTION_OUT    0x2
127
128#define sen_data	  Sen.Data
129#define sen_ip_src	  Sen.Sip4.Src
130#define sen_ip_dst	  Sen.Sip4.Dst
131#define sen_proto	  Sen.Sip4.Proto
132#define sen_sport	  Sen.Sip4.Sport
133#define sen_dport	  Sen.Sip4.Dport
134#define sen_direction     Sen.Sip4.Direction
135#define sen_ip6_src	  Sen.Sip6.Src
136#define sen_ip6_dst	  Sen.Sip6.Dst
137#define sen_ip6_proto	  Sen.Sip6.Proto
138#define sen_ip6_sport	  Sen.Sip6.Sport
139#define sen_ip6_dport	  Sen.Sip6.Dport
140#define sen_ip6_direction Sen.Sip6.Direction
141#define sen_ipsp          Sen.PolicyHead
142
143/*
144 * The "type" is really part of the address as far as the routing
145 * system is concerned. By using only one bit in the type field
146 * for each type, we sort-of make sure that different types of
147 * encapsulation addresses won't be matched against the wrong type.
148 *
149 */
150
151#define SENT_IP4	0x0001		/* data is two struct in_addr */
152#define SENT_IPSP	0x0002		/* data as in IP4/6 plus SPI */
153#define SENT_IP6        0x0004
154
155#define SENT_LEN        sizeof(struct sockaddr_encap)
156
157struct ipsec_acquire
158{
159    union sockaddr_union       ipa_addr;
160    u_int64_t                  ipa_expire;
161    u_int32_t                  ipa_seq;
162    struct sockaddr_encap      ipa_info;
163    struct sockaddr_encap      ipa_mask;
164    struct mbuf               *ipa_packet;
165    TAILQ_ENTRY(ipsec_acquire) ipa_next;
166};
167
168struct ipsec_policy
169{
170    struct sockaddr_encap ipo_addr;
171    struct sockaddr_encap ipo_mask;
172
173    union sockaddr_union ipo_src;   /* Local address to use */
174    union sockaddr_union ipo_dst;   /* Remote gateway -- if it's zeroed:
175				     * - on output, we try to contact the
176				     * remote host directly (if needed).
177				     * - on input, we accept on if the
178				     * inner source is the same as the
179				     * outer source address, or if transport
180				     * mode was used.
181				     */
182
183    u_int64_t            ipo_last_searched; /* Timestamp of last lookup */
184
185    u_int8_t             ipo_flags; /* See IPSP_POLICY_* definitions */
186    u_int8_t             ipo_type;  /* USE/ACQUIRE/... */
187    u_int8_t             ipo_sproto;/* ESP, AH; if zero we use system dflts */
188
189    struct tdb          *ipo_tdb;   /* Cached entry */
190
191    u_int16_t            ipo_srcid_len;
192    u_int16_t            ipo_dstid_len;
193    u_int16_t            ipo_srcid_type;
194    u_int16_t            ipo_dstid_type;
195
196    u_int8_t            *ipo_srcid;
197    u_int8_t            *ipo_dstid;
198
199    TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List of policies on TDB */
200    TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policy entries */
201};
202
203#define IPSP_POLICY_NONE    0x0000  /* No flags set */
204
205#define IPSP_IPSEC_USE      0 /* Use if existing, don't bother establishing */
206#define IPSP_IPSEC_ACQUIRE  1 /* Try to acquire in parallel but let packet */
207#define IPSP_IPSEC_REQUIRE  2 /* Require SA */
208#define IPSP_PERMIT         3 /* Permit traffic through */
209#define IPSP_DENY           4 /* Deny traffic */
210#define IPSP_IPSEC_DONTACQ  5 /* Require, but don't acquire */
211
212/* Notification types */
213#define NOTIFY_SOFT_EXPIRE      0       /* Soft expiration of SA */
214#define NOTIFY_HARD_EXPIRE      1       /* Hard expiration of SA */
215#define NOTIFY_REQUEST_SA       2       /* Establish an SA */
216
217#define NOTIFY_SATYPE_CONF      1       /* SA should do encryption */
218#define NOTIFY_SATYPE_AUTH      2       /* SA should do authentication */
219#define NOTIFY_SATYPE_TUNNEL    4       /* SA should use tunneling */
220
221/*
222 * For encapsulation routes are possible not only for the destination
223 * address but also for the protocol, source and destination ports
224 * if available
225 */
226
227struct route_enc {
228    struct rtentry *re_rt;
229    struct sockaddr_encap re_dst;
230};
231
232struct tdb				/* tunnel descriptor block */
233{
234    /*
235     * Each TDB is on three hash tables: one keyed on dst/spi/sproto,
236     * one keyed on dst/sproto, and one keyed on src/sproto. The first
237     * is used for finding a specific TDB, the second for finding TDBs
238     * TDBs for outgoing policy matching, and the third for incoming
239     * policy matching. The following three fields maintain the hash
240     * queues in those three tables.
241     */
242    struct tdb	     *tdb_hnext;   /* dst/spi/sproto table */
243    struct tdb       *tdb_anext;   /* dst/sproto table */
244    struct tdb       *tdb_snext;   /* src/sproto table */
245    struct tdb       *tdb_inext;
246    struct tdb       *tdb_onext;
247
248    struct xformsw   *tdb_xform;	/* Transformation to use */
249    struct enc_xform *tdb_encalgxform;  /* Encryption algorithm xform */
250    struct auth_hash *tdb_authalgxform; /* Authentication algorithm xform */
251
252#define TDBF_UNIQUE	      0x00001	/* This should not be used by others */
253#define TDBF_TIMER            0x00002	/* Absolute expiration timer in use */
254#define TDBF_BYTES            0x00004	/* Check the byte counters */
255#define TDBF_ALLOCATIONS      0x00008	/* Check the flows counters */
256#define TDBF_INVALID          0x00010	/* This SPI is not valid yet/anymore */
257#define TDBF_FIRSTUSE         0x00020	/* Expire after first use */
258#define TDBF_HALFIV           0x00040   /* Use half-length IV (ESP old only) */
259#define TDBF_SOFT_TIMER       0x00080	/* Soft expiration */
260#define TDBF_SOFT_BYTES       0x00100	/* Soft expiration */
261#define TDBF_SOFT_ALLOCATIONS 0x00200	/* Soft expiration */
262#define TDBF_SOFT_FIRSTUSE    0x00400	/* Soft expiration */
263#define TDBF_PFS              0x00800	/* Ask for PFS from Key Mgmt. */
264#define TDBF_TUNNELING        0x01000	/* Force IP-IP encapsulation */
265#define TDBF_NOREPLAY         0x02000   /* No replay counter present */
266#define TDBF_RANDOMPADDING    0x04000   /* Random data in the ESP padding */
267
268    u_int32_t	      tdb_flags;  	/* Flags related to this TDB */
269
270    struct timeout    tdb_timer_tmo;
271    struct timeout    tdb_first_tmo;
272    struct timeout    tdb_stimer_tmo;
273    struct timeout    tdb_sfirst_tmo;
274
275    u_int32_t         tdb_exp_allocations;  /* Expire after so many flows */
276    u_int32_t         tdb_soft_allocations; /* Expiration warning */
277    u_int32_t         tdb_cur_allocations;  /* Total number of allocations */
278
279    u_int64_t         tdb_exp_bytes;    /* Expire after so many bytes passed */
280    u_int64_t         tdb_soft_bytes;	/* Expiration warning */
281    u_int64_t         tdb_cur_bytes;	/* Current count of bytes */
282
283    u_int64_t         tdb_exp_timeout;	/* When does the SPI expire */
284    u_int64_t         tdb_soft_timeout;	/* Send a soft-expire warning */
285    u_int64_t         tdb_established;	/* When was the SPI established */
286
287    u_int64_t	      tdb_first_use;	  /* When was it first used */
288    u_int64_t         tdb_soft_first_use; /* Soft warning */
289    u_int64_t         tdb_exp_first_use;  /* Expire if tdb_first_use +
290					   * tdb_exp_first_use <= curtime */
291    u_int64_t         tdb_cryptoid;     /* Crypto session ID */
292
293    u_int32_t	      tdb_spi;    	/* SPI */
294    u_int16_t         tdb_amxkeylen;    /* Raw authentication key length */
295    u_int16_t         tdb_emxkeylen;    /* Raw encryption key length */
296    u_int16_t         tdb_ivlen;        /* IV length */
297    u_int16_t         tdb_src_cred_len; /* size of tdb_src_credentials */
298    u_int16_t         tdb_dst_cred_len; /* size of tdb_dst_credentials */
299    u_int8_t	      tdb_sproto;	/* IPsec protocol */
300    u_int8_t          tdb_wnd;          /* Replay window */
301    u_int8_t          tdb_satype;       /* SA type (RFC2367, PF_KEY) */
302    u_int8_t          tdb_src_cred_type;/* type of tdb_src_credentials */
303    u_int8_t          tdb_dst_cred_type;/* type of tdb_dst_credentials */
304
305    union sockaddr_union tdb_dst;	/* Destination address for this SA */
306    union sockaddr_union tdb_src;	/* Source address for this SA */
307    union sockaddr_union tdb_proxy;
308
309    u_int8_t         *tdb_srcid;        /* Source ID for this SA */
310    u_int8_t         *tdb_dstid;        /* Destination ID for this SA */
311    u_int8_t         *tdb_amxkey;       /* Raw authentication key */
312    u_int8_t         *tdb_emxkey;       /* Raw encryption key */
313
314    u_int32_t         tdb_rpl;	        /* Replay counter */
315    u_int32_t         tdb_bitmap;       /* Used for replay sliding window */
316    u_int32_t         tdb_initial;	/* Initial replay value */
317
318    u_int32_t         tdb_epoch;	/* Used by the kernfs interface */
319    u_int16_t         tdb_srcid_len;
320    u_int16_t         tdb_dstid_len;
321    u_int16_t         tdb_srcid_type;
322    u_int16_t         tdb_dstid_type;
323
324    u_int8_t          tdb_iv[4];        /* Used for HALF-IV ESP */
325
326    caddr_t           tdb_src_credentials;
327    caddr_t           tdb_dst_credentials;
328
329    TAILQ_HEAD(tdb_inp_head_in, inpcb) tdb_inp_in;
330    TAILQ_HEAD(tdb_inp_head_out, inpcb) tdb_inp_out;
331    TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head;
332};
333
334struct tdb_ident {
335    u_int32_t spi;
336    union sockaddr_union dst;
337    u_int8_t proto;
338};
339
340struct tdb_crypto {
341    u_int32_t			tc_spi;
342    union sockaddr_union	tc_dst;
343    u_int8_t			tc_proto;
344    u_int32_t			tc_spi2;
345    union sockaddr_union	tc_dst2;
346    u_int8_t			tc_proto2;
347    int                         tc_protoff;
348    int                         tc_skip;
349    caddr_t                     tc_ptr;
350};
351
352struct ipsecinit
353{
354    u_int8_t       *ii_enckey;
355    u_int8_t       *ii_authkey;
356    u_int16_t       ii_enckeylen;
357    u_int16_t       ii_authkeylen;
358    u_int8_t        ii_encalg;
359    u_int8_t        ii_authalg;
360};
361
362struct xformsw
363{
364    u_short		xf_type;	/* Unique ID of xform */
365    u_short		xf_flags;	/* flags (see below) */
366    char		*xf_name;	/* human-readable name */
367    int		(*xf_attach)(void);	/* called at config time */
368    int		(*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *);
369    int		(*xf_zeroize)(struct tdb *); /* termination */
370    int         (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */
371    int		(*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, int, int, struct tdb *);        /* output */
372};
373
374/* xform IDs */
375#define XF_IP4		1	/* IP inside IP */
376#define XF_AH		2	/* AH */
377#define XF_ESP		3	/* ESP */
378#define XF_TCPSIGNATURE	5	/* TCP MD5 Signature option, RFC 2358 */
379
380/* xform attributes */
381#define XFT_AUTH	0x0001
382#define XFT_CONF	0x0100
383
384#define IPSEC_ZEROES_SIZE	256	/* Larger than an IP6 extension hdr. */
385#define IPSEC_KERNFS_BUFSIZE    4096
386
387#if BYTE_ORDER == LITTLE_ENDIAN
388static __inline u_int64_t
389htonq(u_int64_t q)
390{
391    register u_int32_t u, l;
392    u = q >> 32;
393    l = (u_int32_t) q;
394
395    return htonl(u) | ((u_int64_t)htonl(l) << 32);
396}
397
398#define ntohq(_x) htonq(_x)
399
400#elif BYTE_ORDER == BIG_ENDIAN
401
402#define htonq(_x) (_x)
403#define ntohq(_x) htonq(_x)
404
405#else
406#error  "Please fix <machine/endian.h>"
407#endif
408
409#ifdef _KERNEL
410
411/*
412 * Protects all tdb lists.
413 * Must at least be splsoftnet (note: do not use splsoftclock as it is
414 * special on some architectures, assuming it is always an spl lowering
415 * operation).
416 */
417#define spltdb	splsoftnet
418
419extern int encdebug;
420extern int ipsec_acl;
421extern int ipsec_keep_invalid;
422extern int ipsec_in_use;
423extern u_int64_t ipsec_last_added;
424extern int ipsec_require_pfs;
425extern int ipsec_expire_acquire;
426
427extern int ipsec_soft_allocations;
428extern int ipsec_exp_allocations;
429extern int ipsec_soft_bytes;
430extern int ipsec_exp_bytes;
431extern int ipsec_soft_timeout;
432extern int ipsec_exp_timeout;
433extern int ipsec_soft_first_use;
434extern int ipsec_exp_first_use;
435extern char ipsec_def_enc[];
436extern char ipsec_def_auth[];
437
438extern struct enc_xform enc_xform_des;
439extern struct enc_xform enc_xform_3des;
440extern struct enc_xform enc_xform_blf;
441extern struct enc_xform enc_xform_cast5;
442extern struct enc_xform enc_xform_skipjack;
443
444extern struct auth_hash auth_hash_hmac_md5_96;
445extern struct auth_hash auth_hash_hmac_sha1_96;
446extern struct auth_hash auth_hash_hmac_ripemd_160_96;
447
448extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head;
449extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head;
450
451extern struct xformsw xformsw[], *xformswNXFORMSW;
452
453/* Check if a given tdb has encryption, authentication and/or tunneling */
454#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0)| \
455		       ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0))
456
457/* Traverse spi chain and get attributes */
458
459#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\
460	int s = spltdb(); \
461	struct tdb *tmptdb = (TDBP); \
462	\
463	(have) = 0; \
464	while (tmptdb && tmptdb->tdb_xform) { \
465	        if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \
466	                break; \
467                (have) |= TDB_ATTRIB(tmptdb); \
468                tmptdb = tmptdb->TDB_DIR; \
469        } \
470	splx(s); \
471} while (0)
472
473/* Misc. */
474extern char *inet_ntoa4(struct in_addr);
475extern char *ipsp_address(union sockaddr_union);
476
477/* TDB management routines */
478extern void tdb_add_inp(struct tdb *, struct inpcb *, int);
479extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *,
480			     union sockaddr_union *, u_int8_t, int *);
481extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t);
482extern struct tdb *gettdbbyaddr(union sockaddr_union *, u_int8_t,
483				struct mbuf *, int);
484extern struct tdb *gettdbbysrc(union sockaddr_union *, u_int8_t,
485			       struct mbuf *, int);
486extern void puttdb(struct tdb *);
487extern void tdb_delete(struct tdb *);
488extern struct tdb *tdb_alloc(void);
489extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *);
490extern int tdb_walk(int (*)(struct tdb *, void *, int), void *);
491
492/* XF_IP4 */
493extern int ipe4_attach(void);
494extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *);
495extern int ipe4_zeroize(struct tdb *);
496extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int,
497		       struct tdb *);
498extern void ipe4_input __P((struct mbuf *, ...));
499extern void ipip_input __P((struct mbuf *, int));
500
501#ifdef INET
502extern void ip4_input __P((struct mbuf *, ...));
503#endif /* INET */
504
505#ifdef INET6
506extern int ip4_input6 __P((struct mbuf **, int *, int));
507#endif /* INET */
508
509/* XF_ETHERIP */
510extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **,
511			  int, int);
512extern void etherip_input __P((struct mbuf *, ...));
513
514/* XF_AH */
515extern int ah_attach(void);
516extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *);
517extern int ah_zeroize(struct tdb *);
518extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int,
519		     struct tdb *);
520extern int ah_output_cb(void *);
521extern int ah_input(struct mbuf *, struct tdb *, int, int);
522extern int ah_input_cb(void *);
523extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t);
524extern int ah_massage_headers(struct mbuf **, int, int, int, int);
525
526#ifdef INET
527extern void ah4_input __P((struct mbuf *, ...));
528extern int ah4_input_cb __P((struct mbuf *, ...));
529#endif /* INET */
530
531#ifdef INET6
532extern int ah6_input __P((struct mbuf **, int *, int));
533extern int ah6_input_cb __P((struct mbuf *, int, int));
534#endif /* INET6 */
535
536/* XF_ESP */
537extern int esp_attach(void);
538extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *);
539extern int esp_zeroize(struct tdb *);
540extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int,
541		      struct tdb *);
542extern int esp_output_cb(void *);
543extern int esp_input(struct mbuf *, struct tdb *, int, int);
544extern int esp_input_cb(void *);
545extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
546
547#ifdef INET
548extern void esp4_input __P((struct mbuf *, ...));
549extern int esp4_input_cb __P((struct mbuf *, ...));
550#endif /* INET */
551
552#ifdef INET6
553extern int esp6_input __P((struct mbuf **, int *, int));
554extern int esp6_input_cb __P((struct mbuf *, int, int));
555#endif /* INET6 */
556
557/* XF_TCPSIGNATURE */
558extern int tcp_signature_tdb_attach __P((void));
559extern int tcp_signature_tdb_init __P((struct tdb *, struct xformsw *,
560				       struct ipsecinit *));
561extern int tcp_signature_tdb_zeroize __P((struct tdb *));
562extern int tcp_signature_tdb_input __P((struct mbuf *, struct tdb *, int,
563					int));
564extern int tcp_signature_tdb_output __P((struct mbuf *, struct tdb *,
565					 struct mbuf **, int, int,
566					 struct tdb *));
567
568/* Padding */
569extern caddr_t m_pad(struct mbuf *, int);
570
571/* Replay window */
572extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t,
573                               u_int32_t *);
574
575extern unsigned char ipseczeroes[];
576
577/* Packet processing */
578extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int,
579			       struct tdb *);
580extern int ipsp_process_done(struct mbuf *, struct tdb *, struct tdb *);
581extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int,
582                                   struct tdb *, struct inpcb *);
583extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int);
584extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *,
585			   union sockaddr_union *, struct sockaddr_encap *,
586			   struct mbuf *);
587extern struct ipsec_policy *ipsec_add_policy(struct sockaddr_encap *,
588					     struct sockaddr_encap *,
589					     union sockaddr_union *, int, int);
590extern int ipsp_match_policy(struct tdb *, struct ipsec_policy *,
591			     struct mbuf *, int);
592extern int ipsec_delete_policy(struct ipsec_policy *);
593extern void ipsp_acquire_expirations(void *);
594extern struct ipsec_acquire *ipsp_pending_acquire(union sockaddr_union *);
595extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t);
596extern void ipsp_delete_acquire(struct ipsec_acquire *);
597extern void ipsp_clear_acquire(struct tdb *);
598extern void *ipsp_copy_ident(void *);
599#endif /* _KERNEL */
600#endif /* _NETINET_IPSP_H_ */
601