2/* $KAME: ipsec.h,v 1.53 2001/11/20 08:32:38 itojun Exp $ */
3
4/*-
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * IPsec controller part.
35 */
36
37#ifndef _NETIPSEC_IPSEC_H_
38#define _NETIPSEC_IPSEC_H_
39
40#if defined(_KERNEL) && !defined(_LKM) && !defined(KLD_MODULE)
41#include "opt_inet.h"
42#include "opt_ipsec.h"
43#endif
44
45#include <net/pfkeyv2.h>
46#include <netipsec/keydb.h>
47
48#ifdef _KERNEL
49
50#define IPSEC_ASSERT(_c,_m) KASSERT(_c, _m)
51
52#define IPSEC_IS_PRIVILEGED_SO(_so) \
53 ((_so)->so_cred != NULL && \
54 priv_check_cred((_so)->so_cred, PRIV_NETINET_IPSEC, 0) \
55 == 0)
56
57/*
58 * Security Policy Index
59 * Ensure that both address families in the "src" and "dst" are same.
60 * When the value of the ul_proto is ICMPv6, the port field in "src"
61 * specifies ICMPv6 type, and the port field in "dst" specifies ICMPv6 code.
62 */
63struct secpolicyindex {
64 u_int8_t dir; /* direction of packet flow, see below */
65 union sockaddr_union src; /* IP src address for SP */
66 union sockaddr_union dst; /* IP dst address for SP */
67 u_int8_t prefs; /* prefix length in bits for src */
68 u_int8_t prefd; /* prefix length in bits for dst */
69 u_int16_t ul_proto; /* upper layer Protocol */
70#ifdef notyet
71 uid_t uids;
72 uid_t uidd;
73 gid_t gids;
74 gid_t gidd;
75#endif
76};
77
78/* Security Policy Data Base */
79struct secpolicy {
80 LIST_ENTRY(secpolicy) chain;
81 struct mtx lock;
82
83 u_int refcnt; /* reference count */
84 struct secpolicyindex spidx; /* selector */
85 u_int32_t id; /* It's unique number on the system. */
86 u_int state; /* 0: dead, others: alive */
87#define IPSEC_SPSTATE_DEAD 0
88#define IPSEC_SPSTATE_ALIVE 1
89 u_int16_t policy; /* policy_type per pfkeyv2.h */
90 u_int16_t scangen; /* scan generation # */
91 struct ipsecrequest *req;
92 /* pointer to the ipsec request tree, */
93 /* if policy == IPSEC else this value == NULL.*/
94
95 /*
96 * lifetime handler.
97 * the policy can be used without limitiation if both lifetime and
98 * validtime are zero.
99 * "lifetime" is passed by sadb_lifetime.sadb_lifetime_addtime.
100 * "validtime" is passed by sadb_lifetime.sadb_lifetime_usetime.
101 */
102 time_t created; /* time created the policy */
103 time_t lastused; /* updated every when kernel sends a packet */
104 long lifetime; /* duration of the lifetime of this policy */
105 long validtime; /* duration this policy is valid without use */
106};
107
108#define SECPOLICY_LOCK_INIT(_sp) \
109 mtx_init(&(_sp)->lock, "ipsec policy", NULL, MTX_DEF)
110#define SECPOLICY_LOCK(_sp) mtx_lock(&(_sp)->lock)
111#define SECPOLICY_UNLOCK(_sp) mtx_unlock(&(_sp)->lock)
112#define SECPOLICY_LOCK_DESTROY(_sp) mtx_destroy(&(_sp)->lock)
113#define SECPOLICY_LOCK_ASSERT(_sp) mtx_assert(&(_sp)->lock, MA_OWNED)
114
115/* Request for IPsec */
116struct ipsecrequest {
117 struct ipsecrequest *next;
118 /* pointer to next structure */
119 /* If NULL, it means the end of chain. */
120 struct secasindex saidx;/* hint for search proper SA */
121 /* if __ss_len == 0 then no address specified.*/
122 u_int level; /* IPsec level defined below. */
123
124 struct secasvar *sav; /* place holder of SA for use */
125 struct secpolicy *sp; /* back pointer to SP */
126 struct rwlock lock; /* to interlock updates */
127};
128
129/*
130 * Need recursion for when crypto callbacks happen directly,
131 * as in the case of software crypto. Need to look at how
132 * hard it is to remove this...
133 */
134#define IPSECREQUEST_LOCK_INIT(_isr) \
135 rw_init_flags(&(_isr)->lock, "ipsec request", RW_RECURSE)
136#define IPSECREQUEST_LOCK(_isr) rw_rlock(&(_isr)->lock)
137#define IPSECREQUEST_UNLOCK(_isr) rw_runlock(&(_isr)->lock)
138#define IPSECREQUEST_WLOCK(_isr) rw_wlock(&(_isr)->lock)
139#define IPSECREQUEST_WUNLOCK(_isr) rw_wunlock(&(_isr)->lock)
140#define IPSECREQUEST_UPGRADE(_isr) rw_try_upgrade(&(_isr)->lock)
141#define IPSECREQUEST_DOWNGRADE(_isr) rw_downgrade(&(_isr)->lock)
142#define IPSECREQUEST_LOCK_DESTROY(_isr) rw_destroy(&(_isr)->lock)
143#define IPSECREQUEST_LOCK_ASSERT(_isr) rw_assert(&(_isr)->lock, RA_LOCKED)
144
145/* security policy in PCB */
146struct inpcbpolicy {
147 struct secpolicy *sp_in;
148 struct secpolicy *sp_out;
149 int priv; /* privileged socket ? */
150};
151
152/* SP acquiring list table. */
153struct secspacq {
154 LIST_ENTRY(secspacq) chain;
155
156 struct secpolicyindex spidx;
157
158 time_t created; /* for lifetime */
159 int count; /* for lifetime */
160 /* XXX: here is mbuf place holder to be sent ? */
161};
162#endif /* _KERNEL */
163
164/* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */
165#define IPSEC_PORT_ANY 0
166#define IPSEC_ULPROTO_ANY 255
167#define IPSEC_PROTO_ANY 255
168
169/* mode of security protocol */
170/* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */
171#define IPSEC_MODE_ANY 0 /* i.e. wildcard. */
172#define IPSEC_MODE_TRANSPORT 1
173#define IPSEC_MODE_TUNNEL 2
174#define IPSEC_MODE_TCPMD5 3 /* TCP MD5 mode */
175
176/*
177 * Direction of security policy.
178 * NOTE: Since INVALID is used just as flag.
179 * The other are used for loop counter too.
180 */
181#define IPSEC_DIR_ANY 0
182#define IPSEC_DIR_INBOUND 1
183#define IPSEC_DIR_OUTBOUND 2
184#define IPSEC_DIR_MAX 3
185#define IPSEC_DIR_INVALID 4
186
187/* Policy level */
188/*
189 * IPSEC, ENTRUST and BYPASS are allowed for setsockopt() in PCB,
190 * DISCARD, IPSEC and NONE are allowed for setkey() in SPD.
191 * DISCARD and NONE are allowed for system default.
192 */
193#define IPSEC_POLICY_DISCARD 0 /* discarding packet */
194#define IPSEC_POLICY_NONE 1 /* through IPsec engine */
195#define IPSEC_POLICY_IPSEC 2 /* do IPsec */
196#define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */
197#define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */
198
199/* Security protocol level */
200#define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */
201#define IPSEC_LEVEL_USE 1 /* use SA if present. */
202#define IPSEC_LEVEL_REQUIRE 2 /* require SA. */
203#define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */
204
205#define IPSEC_MANUAL_REQID_MAX 0x3fff
206 /*
207 * if security policy level == unique, this id
208 * indicate to a relative SA for use, else is
209 * zero.
210 * 1 - 0x3fff are reserved for manual keying.
211 * 0 are reserved for above reason. Others is
212 * for kernel use.
213 * Note that this id doesn't identify SA
214 * by only itself.
215 */
216#define IPSEC_REPLAYWSIZE 32
217
218/* statistics for ipsec processing */
219struct ipsecstat {
220 uint64_t ips_in_polvio; /* input: sec policy violation */
221 uint64_t ips_in_nomem; /* input: no memory available */
222 uint64_t ips_in_inval; /* input: generic error */
223
224 uint64_t ips_out_polvio; /* output: sec policy violation */
225 uint64_t ips_out_nosa; /* output: SA unavailable */
226 uint64_t ips_out_nomem; /* output: no memory available */
227 uint64_t ips_out_noroute; /* output: no route available */
228 uint64_t ips_out_inval; /* output: generic error */
229 uint64_t ips_out_bundlesa; /* output: bundled SA processed */
230
231 uint64_t ips_mbcoalesced; /* mbufs coalesced during clone */
232 uint64_t ips_clcoalesced; /* clusters coalesced during clone */
233 uint64_t ips_clcopied; /* clusters copied during clone */
234 uint64_t ips_mbinserted; /* mbufs inserted during makespace */
235 /*
236 * Temporary statistics for performance analysis.
237 */
238 /* See where ESP/AH/IPCOMP header land in mbuf on input */
239 uint64_t ips_input_front;
240 uint64_t ips_input_middle;
241 uint64_t ips_input_end;
242};
243
244/*
245 * Definitions for IPsec & Key sysctl operations.
246 */
247#define IPSECCTL_STATS 1 /* stats */
248#define IPSECCTL_DEF_POLICY 2
249#define IPSECCTL_DEF_ESP_TRANSLEV 3 /* int; ESP transport mode */
250#define IPSECCTL_DEF_ESP_NETLEV 4 /* int; ESP tunnel mode */
251#define IPSECCTL_DEF_AH_TRANSLEV 5 /* int; AH transport mode */
252#define IPSECCTL_DEF_AH_NETLEV 6 /* int; AH tunnel mode */
253#if 0 /* obsolete, do not reuse */
254#define IPSECCTL_INBOUND_CALL_IKE 7
255#endif
256#define IPSECCTL_AH_CLEARTOS 8
257#define IPSECCTL_AH_OFFSETMASK 9
258#define IPSECCTL_DFBIT 10
259#define IPSECCTL_ECN 11
260#define IPSECCTL_DEBUG 12
261#define IPSECCTL_ESP_RANDPAD 13
262
263#ifdef _KERNEL
264#include <sys/counter.h>
265
266struct ipsec_output_state {
267 struct mbuf *m;
268 struct route *ro;
269 struct sockaddr *dst;
270};
271
272struct ipsec_history {
273 int ih_proto;
274 u_int32_t ih_spi;
275};
276
277VNET_DECLARE(int, ipsec_debug);
278#define V_ipsec_debug VNET(ipsec_debug)
279
280#ifdef REGRESSION
281VNET_DECLARE(int, ipsec_replay);
282VNET_DECLARE(int, ipsec_integrity);
283
284#define V_ipsec_replay VNET(ipsec_replay)
285#define V_ipsec_integrity VNET(ipsec_integrity)
286#endif
287
288VNET_PCPUSTAT_DECLARE(struct ipsecstat, ipsec4stat);
289VNET_DECLARE(struct secpolicy, ip4_def_policy);
290VNET_DECLARE(int, ip4_esp_trans_deflev);
291VNET_DECLARE(int, ip4_esp_net_deflev);
292VNET_DECLARE(int, ip4_ah_trans_deflev);
293VNET_DECLARE(int, ip4_ah_net_deflev);
294VNET_DECLARE(int, ip4_ah_offsetmask);
295VNET_DECLARE(int, ip4_ipsec_dfbit);
296VNET_DECLARE(int, ip4_ipsec_ecn);
297VNET_DECLARE(int, ip4_esp_randpad);
298VNET_DECLARE(int, crypto_support);
299
300#define IPSECSTAT_INC(name) \
301 VNET_PCPUSTAT_ADD(struct ipsecstat, ipsec4stat, name, 1)
302#define V_ip4_def_policy VNET(ip4_def_policy)
303#define V_ip4_esp_trans_deflev VNET(ip4_esp_trans_deflev)
304#define V_ip4_esp_net_deflev VNET(ip4_esp_net_deflev)
305#define V_ip4_ah_trans_deflev VNET(ip4_ah_trans_deflev)
306#define V_ip4_ah_net_deflev VNET(ip4_ah_net_deflev)
307#define V_ip4_ah_offsetmask VNET(ip4_ah_offsetmask)
308#define V_ip4_ipsec_dfbit VNET(ip4_ipsec_dfbit)
309#define V_ip4_ipsec_ecn VNET(ip4_ipsec_ecn)
310#define V_ip4_esp_randpad VNET(ip4_esp_randpad)
311#define V_crypto_support VNET(crypto_support)
312
313#define ipseclog(x) do { if (V_ipsec_debug) log x; } while (0)
314/* for openbsd compatibility */
315#define DPRINTF(x) do { if (V_ipsec_debug) printf x; } while (0)
316
317extern struct ipsecrequest *ipsec_newisr(void);
318extern void ipsec_delisr(struct ipsecrequest *);
319
320struct tdb_ident;
321extern struct secpolicy *ipsec_getpolicy __P((struct tdb_ident*, u_int));
322struct inpcb;
323extern struct secpolicy *ipsec4_checkpolicy __P((struct mbuf *, u_int, u_int,
324 int *, struct inpcb *));
325extern struct secpolicy * ipsec_getpolicybyaddr(struct mbuf *, u_int,
326 int, int *);
327
328struct inpcb;
329extern int ipsec_init_policy __P((struct socket *so, struct inpcbpolicy **));
330extern int ipsec_copy_policy
331 __P((struct inpcbpolicy *, struct inpcbpolicy *));
332extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *));
333extern int ipsec_in_reject __P((struct secpolicy *, struct mbuf *));
334
335extern int ipsec_set_policy __P((struct inpcb *inp, int optname,
336 caddr_t request, size_t len, struct ucred *cred));
337extern int ipsec_get_policy __P((struct inpcb *inpcb, caddr_t request,
338 size_t len, struct mbuf **mp));
339extern int ipsec_delete_pcbpolicy __P((struct inpcb *));
340extern int ipsec4_in_reject __P((struct mbuf *, struct inpcb *));
341
342struct secas;
343struct tcpcb;
344extern int ipsec_chkreplay __P((u_int32_t, struct secasvar *));
345extern int ipsec_updatereplay __P((u_int32_t, struct secasvar *));
346
347extern size_t ipsec_hdrsiz __P((struct mbuf *, u_int, struct inpcb *));
348extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *));
349
350union sockaddr_union;
351extern char * ipsec_address(union sockaddr_union* sa);
352extern const char *ipsec_logsastr __P((struct secasvar *));
353
354extern void ipsec_dumpmbuf __P((struct mbuf *));
355
356struct m_tag;
| 2/* $KAME: ipsec.h,v 1.53 2001/11/20 08:32:38 itojun Exp $ */
3
4/*-
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the project nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33/*
34 * IPsec controller part.
35 */
36
37#ifndef _NETIPSEC_IPSEC_H_
38#define _NETIPSEC_IPSEC_H_
39
40#if defined(_KERNEL) && !defined(_LKM) && !defined(KLD_MODULE)
41#include "opt_inet.h"
42#include "opt_ipsec.h"
43#endif
44
45#include <net/pfkeyv2.h>
46#include <netipsec/keydb.h>
47
48#ifdef _KERNEL
49
50#define IPSEC_ASSERT(_c,_m) KASSERT(_c, _m)
51
52#define IPSEC_IS_PRIVILEGED_SO(_so) \
53 ((_so)->so_cred != NULL && \
54 priv_check_cred((_so)->so_cred, PRIV_NETINET_IPSEC, 0) \
55 == 0)
56
57/*
58 * Security Policy Index
59 * Ensure that both address families in the "src" and "dst" are same.
60 * When the value of the ul_proto is ICMPv6, the port field in "src"
61 * specifies ICMPv6 type, and the port field in "dst" specifies ICMPv6 code.
62 */
63struct secpolicyindex {
64 u_int8_t dir; /* direction of packet flow, see below */
65 union sockaddr_union src; /* IP src address for SP */
66 union sockaddr_union dst; /* IP dst address for SP */
67 u_int8_t prefs; /* prefix length in bits for src */
68 u_int8_t prefd; /* prefix length in bits for dst */
69 u_int16_t ul_proto; /* upper layer Protocol */
70#ifdef notyet
71 uid_t uids;
72 uid_t uidd;
73 gid_t gids;
74 gid_t gidd;
75#endif
76};
77
78/* Security Policy Data Base */
79struct secpolicy {
80 LIST_ENTRY(secpolicy) chain;
81 struct mtx lock;
82
83 u_int refcnt; /* reference count */
84 struct secpolicyindex spidx; /* selector */
85 u_int32_t id; /* It's unique number on the system. */
86 u_int state; /* 0: dead, others: alive */
87#define IPSEC_SPSTATE_DEAD 0
88#define IPSEC_SPSTATE_ALIVE 1
89 u_int16_t policy; /* policy_type per pfkeyv2.h */
90 u_int16_t scangen; /* scan generation # */
91 struct ipsecrequest *req;
92 /* pointer to the ipsec request tree, */
93 /* if policy == IPSEC else this value == NULL.*/
94
95 /*
96 * lifetime handler.
97 * the policy can be used without limitiation if both lifetime and
98 * validtime are zero.
99 * "lifetime" is passed by sadb_lifetime.sadb_lifetime_addtime.
100 * "validtime" is passed by sadb_lifetime.sadb_lifetime_usetime.
101 */
102 time_t created; /* time created the policy */
103 time_t lastused; /* updated every when kernel sends a packet */
104 long lifetime; /* duration of the lifetime of this policy */
105 long validtime; /* duration this policy is valid without use */
106};
107
108#define SECPOLICY_LOCK_INIT(_sp) \
109 mtx_init(&(_sp)->lock, "ipsec policy", NULL, MTX_DEF)
110#define SECPOLICY_LOCK(_sp) mtx_lock(&(_sp)->lock)
111#define SECPOLICY_UNLOCK(_sp) mtx_unlock(&(_sp)->lock)
112#define SECPOLICY_LOCK_DESTROY(_sp) mtx_destroy(&(_sp)->lock)
113#define SECPOLICY_LOCK_ASSERT(_sp) mtx_assert(&(_sp)->lock, MA_OWNED)
114
115/* Request for IPsec */
116struct ipsecrequest {
117 struct ipsecrequest *next;
118 /* pointer to next structure */
119 /* If NULL, it means the end of chain. */
120 struct secasindex saidx;/* hint for search proper SA */
121 /* if __ss_len == 0 then no address specified.*/
122 u_int level; /* IPsec level defined below. */
123
124 struct secasvar *sav; /* place holder of SA for use */
125 struct secpolicy *sp; /* back pointer to SP */
126 struct rwlock lock; /* to interlock updates */
127};
128
129/*
130 * Need recursion for when crypto callbacks happen directly,
131 * as in the case of software crypto. Need to look at how
132 * hard it is to remove this...
133 */
134#define IPSECREQUEST_LOCK_INIT(_isr) \
135 rw_init_flags(&(_isr)->lock, "ipsec request", RW_RECURSE)
136#define IPSECREQUEST_LOCK(_isr) rw_rlock(&(_isr)->lock)
137#define IPSECREQUEST_UNLOCK(_isr) rw_runlock(&(_isr)->lock)
138#define IPSECREQUEST_WLOCK(_isr) rw_wlock(&(_isr)->lock)
139#define IPSECREQUEST_WUNLOCK(_isr) rw_wunlock(&(_isr)->lock)
140#define IPSECREQUEST_UPGRADE(_isr) rw_try_upgrade(&(_isr)->lock)
141#define IPSECREQUEST_DOWNGRADE(_isr) rw_downgrade(&(_isr)->lock)
142#define IPSECREQUEST_LOCK_DESTROY(_isr) rw_destroy(&(_isr)->lock)
143#define IPSECREQUEST_LOCK_ASSERT(_isr) rw_assert(&(_isr)->lock, RA_LOCKED)
144
145/* security policy in PCB */
146struct inpcbpolicy {
147 struct secpolicy *sp_in;
148 struct secpolicy *sp_out;
149 int priv; /* privileged socket ? */
150};
151
152/* SP acquiring list table. */
153struct secspacq {
154 LIST_ENTRY(secspacq) chain;
155
156 struct secpolicyindex spidx;
157
158 time_t created; /* for lifetime */
159 int count; /* for lifetime */
160 /* XXX: here is mbuf place holder to be sent ? */
161};
162#endif /* _KERNEL */
163
164/* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */
165#define IPSEC_PORT_ANY 0
166#define IPSEC_ULPROTO_ANY 255
167#define IPSEC_PROTO_ANY 255
168
169/* mode of security protocol */
170/* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */
171#define IPSEC_MODE_ANY 0 /* i.e. wildcard. */
172#define IPSEC_MODE_TRANSPORT 1
173#define IPSEC_MODE_TUNNEL 2
174#define IPSEC_MODE_TCPMD5 3 /* TCP MD5 mode */
175
176/*
177 * Direction of security policy.
178 * NOTE: Since INVALID is used just as flag.
179 * The other are used for loop counter too.
180 */
181#define IPSEC_DIR_ANY 0
182#define IPSEC_DIR_INBOUND 1
183#define IPSEC_DIR_OUTBOUND 2
184#define IPSEC_DIR_MAX 3
185#define IPSEC_DIR_INVALID 4
186
187/* Policy level */
188/*
189 * IPSEC, ENTRUST and BYPASS are allowed for setsockopt() in PCB,
190 * DISCARD, IPSEC and NONE are allowed for setkey() in SPD.
191 * DISCARD and NONE are allowed for system default.
192 */
193#define IPSEC_POLICY_DISCARD 0 /* discarding packet */
194#define IPSEC_POLICY_NONE 1 /* through IPsec engine */
195#define IPSEC_POLICY_IPSEC 2 /* do IPsec */
196#define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */
197#define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */
198
199/* Security protocol level */
200#define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */
201#define IPSEC_LEVEL_USE 1 /* use SA if present. */
202#define IPSEC_LEVEL_REQUIRE 2 /* require SA. */
203#define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */
204
205#define IPSEC_MANUAL_REQID_MAX 0x3fff
206 /*
207 * if security policy level == unique, this id
208 * indicate to a relative SA for use, else is
209 * zero.
210 * 1 - 0x3fff are reserved for manual keying.
211 * 0 are reserved for above reason. Others is
212 * for kernel use.
213 * Note that this id doesn't identify SA
214 * by only itself.
215 */
216#define IPSEC_REPLAYWSIZE 32
217
218/* statistics for ipsec processing */
219struct ipsecstat {
220 uint64_t ips_in_polvio; /* input: sec policy violation */
221 uint64_t ips_in_nomem; /* input: no memory available */
222 uint64_t ips_in_inval; /* input: generic error */
223
224 uint64_t ips_out_polvio; /* output: sec policy violation */
225 uint64_t ips_out_nosa; /* output: SA unavailable */
226 uint64_t ips_out_nomem; /* output: no memory available */
227 uint64_t ips_out_noroute; /* output: no route available */
228 uint64_t ips_out_inval; /* output: generic error */
229 uint64_t ips_out_bundlesa; /* output: bundled SA processed */
230
231 uint64_t ips_mbcoalesced; /* mbufs coalesced during clone */
232 uint64_t ips_clcoalesced; /* clusters coalesced during clone */
233 uint64_t ips_clcopied; /* clusters copied during clone */
234 uint64_t ips_mbinserted; /* mbufs inserted during makespace */
235 /*
236 * Temporary statistics for performance analysis.
237 */
238 /* See where ESP/AH/IPCOMP header land in mbuf on input */
239 uint64_t ips_input_front;
240 uint64_t ips_input_middle;
241 uint64_t ips_input_end;
242};
243
244/*
245 * Definitions for IPsec & Key sysctl operations.
246 */
247#define IPSECCTL_STATS 1 /* stats */
248#define IPSECCTL_DEF_POLICY 2
249#define IPSECCTL_DEF_ESP_TRANSLEV 3 /* int; ESP transport mode */
250#define IPSECCTL_DEF_ESP_NETLEV 4 /* int; ESP tunnel mode */
251#define IPSECCTL_DEF_AH_TRANSLEV 5 /* int; AH transport mode */
252#define IPSECCTL_DEF_AH_NETLEV 6 /* int; AH tunnel mode */
253#if 0 /* obsolete, do not reuse */
254#define IPSECCTL_INBOUND_CALL_IKE 7
255#endif
256#define IPSECCTL_AH_CLEARTOS 8
257#define IPSECCTL_AH_OFFSETMASK 9
258#define IPSECCTL_DFBIT 10
259#define IPSECCTL_ECN 11
260#define IPSECCTL_DEBUG 12
261#define IPSECCTL_ESP_RANDPAD 13
262
263#ifdef _KERNEL
264#include <sys/counter.h>
265
266struct ipsec_output_state {
267 struct mbuf *m;
268 struct route *ro;
269 struct sockaddr *dst;
270};
271
272struct ipsec_history {
273 int ih_proto;
274 u_int32_t ih_spi;
275};
276
277VNET_DECLARE(int, ipsec_debug);
278#define V_ipsec_debug VNET(ipsec_debug)
279
280#ifdef REGRESSION
281VNET_DECLARE(int, ipsec_replay);
282VNET_DECLARE(int, ipsec_integrity);
283
284#define V_ipsec_replay VNET(ipsec_replay)
285#define V_ipsec_integrity VNET(ipsec_integrity)
286#endif
287
288VNET_PCPUSTAT_DECLARE(struct ipsecstat, ipsec4stat);
289VNET_DECLARE(struct secpolicy, ip4_def_policy);
290VNET_DECLARE(int, ip4_esp_trans_deflev);
291VNET_DECLARE(int, ip4_esp_net_deflev);
292VNET_DECLARE(int, ip4_ah_trans_deflev);
293VNET_DECLARE(int, ip4_ah_net_deflev);
294VNET_DECLARE(int, ip4_ah_offsetmask);
295VNET_DECLARE(int, ip4_ipsec_dfbit);
296VNET_DECLARE(int, ip4_ipsec_ecn);
297VNET_DECLARE(int, ip4_esp_randpad);
298VNET_DECLARE(int, crypto_support);
299
300#define IPSECSTAT_INC(name) \
301 VNET_PCPUSTAT_ADD(struct ipsecstat, ipsec4stat, name, 1)
302#define V_ip4_def_policy VNET(ip4_def_policy)
303#define V_ip4_esp_trans_deflev VNET(ip4_esp_trans_deflev)
304#define V_ip4_esp_net_deflev VNET(ip4_esp_net_deflev)
305#define V_ip4_ah_trans_deflev VNET(ip4_ah_trans_deflev)
306#define V_ip4_ah_net_deflev VNET(ip4_ah_net_deflev)
307#define V_ip4_ah_offsetmask VNET(ip4_ah_offsetmask)
308#define V_ip4_ipsec_dfbit VNET(ip4_ipsec_dfbit)
309#define V_ip4_ipsec_ecn VNET(ip4_ipsec_ecn)
310#define V_ip4_esp_randpad VNET(ip4_esp_randpad)
311#define V_crypto_support VNET(crypto_support)
312
313#define ipseclog(x) do { if (V_ipsec_debug) log x; } while (0)
314/* for openbsd compatibility */
315#define DPRINTF(x) do { if (V_ipsec_debug) printf x; } while (0)
316
317extern struct ipsecrequest *ipsec_newisr(void);
318extern void ipsec_delisr(struct ipsecrequest *);
319
320struct tdb_ident;
321extern struct secpolicy *ipsec_getpolicy __P((struct tdb_ident*, u_int));
322struct inpcb;
323extern struct secpolicy *ipsec4_checkpolicy __P((struct mbuf *, u_int, u_int,
324 int *, struct inpcb *));
325extern struct secpolicy * ipsec_getpolicybyaddr(struct mbuf *, u_int,
326 int, int *);
327
328struct inpcb;
329extern int ipsec_init_policy __P((struct socket *so, struct inpcbpolicy **));
330extern int ipsec_copy_policy
331 __P((struct inpcbpolicy *, struct inpcbpolicy *));
332extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *));
333extern int ipsec_in_reject __P((struct secpolicy *, struct mbuf *));
334
335extern int ipsec_set_policy __P((struct inpcb *inp, int optname,
336 caddr_t request, size_t len, struct ucred *cred));
337extern int ipsec_get_policy __P((struct inpcb *inpcb, caddr_t request,
338 size_t len, struct mbuf **mp));
339extern int ipsec_delete_pcbpolicy __P((struct inpcb *));
340extern int ipsec4_in_reject __P((struct mbuf *, struct inpcb *));
341
342struct secas;
343struct tcpcb;
344extern int ipsec_chkreplay __P((u_int32_t, struct secasvar *));
345extern int ipsec_updatereplay __P((u_int32_t, struct secasvar *));
346
347extern size_t ipsec_hdrsiz __P((struct mbuf *, u_int, struct inpcb *));
348extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *));
349
350union sockaddr_union;
351extern char * ipsec_address(union sockaddr_union* sa);
352extern const char *ipsec_logsastr __P((struct secasvar *));
353
354extern void ipsec_dumpmbuf __P((struct mbuf *));
355
356struct m_tag;
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362extern int ipsec4_common_input(struct mbuf *m, ...);
363extern int ipsec4_common_input_cb(struct mbuf *m, struct secasvar *sav,
364 int skip, int protoff, struct m_tag *mt);
365extern int ipsec4_process_packet __P((struct mbuf *, struct ipsecrequest *,
366 int, int));
367extern int ipsec_process_done __P((struct mbuf *, struct ipsecrequest *));
368
369extern struct mbuf *ipsec_copypkt __P((struct mbuf *));
370
371extern void m_checkalignment(const char* where, struct mbuf *m0,
372 int off, int len);
373extern struct mbuf *m_makespace(struct mbuf *m0, int skip, int hlen, int *off);
374extern caddr_t m_pad(struct mbuf *m, int n);
375extern int m_striphdr(struct mbuf *m, int skip, int hlen);
376
377#ifdef DEV_ENC
378#define ENC_BEFORE 0x0001
379#define ENC_AFTER 0x0002
380#define ENC_IN 0x0100
381#define ENC_OUT 0x0200
382extern int ipsec_filter(struct mbuf **, int, int);
383extern void ipsec_bpf(struct mbuf *, struct secasvar *, int, int);
384#endif
385#endif /* _KERNEL */
386
387#ifndef _KERNEL
388extern caddr_t ipsec_set_policy __P((char *, int));
389extern int ipsec_get_policylen __P((caddr_t));
390extern char *ipsec_dump_policy __P((caddr_t, char *));
391
392extern const char *ipsec_strerror __P((void));
393
394#endif /* ! KERNEL */
395
396#endif /* _NETIPSEC_IPSEC_H_ */
| 362extern int ipsec4_common_input(struct mbuf *m, ...);
363extern int ipsec4_common_input_cb(struct mbuf *m, struct secasvar *sav,
364 int skip, int protoff, struct m_tag *mt);
365extern int ipsec4_process_packet __P((struct mbuf *, struct ipsecrequest *,
366 int, int));
367extern int ipsec_process_done __P((struct mbuf *, struct ipsecrequest *));
368
369extern struct mbuf *ipsec_copypkt __P((struct mbuf *));
370
371extern void m_checkalignment(const char* where, struct mbuf *m0,
372 int off, int len);
373extern struct mbuf *m_makespace(struct mbuf *m0, int skip, int hlen, int *off);
374extern caddr_t m_pad(struct mbuf *m, int n);
375extern int m_striphdr(struct mbuf *m, int skip, int hlen);
376
377#ifdef DEV_ENC
378#define ENC_BEFORE 0x0001
379#define ENC_AFTER 0x0002
380#define ENC_IN 0x0100
381#define ENC_OUT 0x0200
382extern int ipsec_filter(struct mbuf **, int, int);
383extern void ipsec_bpf(struct mbuf *, struct secasvar *, int, int);
384#endif
385#endif /* _KERNEL */
386
387#ifndef _KERNEL
388extern caddr_t ipsec_set_policy __P((char *, int));
389extern int ipsec_get_policylen __P((caddr_t));
390extern char *ipsec_dump_policy __P((caddr_t, char *));
391
392extern const char *ipsec_strerror __P((void));
393
394#endif /* ! KERNEL */
395
396#endif /* _NETIPSEC_IPSEC_H_ */
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