2 /* $KAME: ipsec.h,v 1.53 2001/11/20 08:32:38 itojun Exp $ */
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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9 * modification, are permitted provided that the following conditions
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
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
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26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * IPsec controller part.
37 #ifndef _NETIPSEC_IPSEC_H_
38 #define _NETIPSEC_IPSEC_H_
40 #if defined(_KERNEL) && !defined(_LKM) && !defined(KLD_MODULE)
42 #include "opt_ipsec.h"
45 #include <net/pfkeyv2.h>
46 #include <netipsec/keydb.h>
50 #include <sys/_lock.h>
51 #include <sys/_mutex.h>
52 #include <sys/_rwlock.h>
54 #define IPSEC_ASSERT(_c,_m) KASSERT(_c, _m)
57 * Security Policy Index
58 * Ensure that both address families in the "src" and "dst" are same.
59 * When the value of the ul_proto is ICMPv6, the port field in "src"
60 * specifies ICMPv6 type, and the port field in "dst" specifies ICMPv6 code.
62 struct secpolicyindex {
63 union sockaddr_union src; /* IP src address for SP */
64 union sockaddr_union dst; /* IP dst address for SP */
65 uint8_t ul_proto; /* upper layer Protocol */
66 uint8_t dir; /* direction of packet flow */
67 uint8_t prefs; /* prefix length in bits for src */
68 uint8_t prefd; /* prefix length in bits for dst */
71 /* Request for IPsec */
73 struct secasindex saidx;/* hint for search proper SA */
74 /* if __ss_len == 0 then no address specified.*/
75 u_int level; /* IPsec level defined below. */
78 /* Security Policy Data Base */
80 TAILQ_ENTRY(secpolicy) chain;
81 LIST_ENTRY(secpolicy) idhash;
82 LIST_ENTRY(secpolicy) drainq;
84 struct secpolicyindex spidx; /* selector */
85 #define IPSEC_MAXREQ 4
86 struct ipsecrequest *req[IPSEC_MAXREQ];
87 u_int tcount; /* IPsec transforms count */
88 volatile u_int refcnt; /* reference count */
89 u_int policy; /* policy_type per pfkeyv2.h */
91 #define IPSEC_SPSTATE_DEAD 0
92 #define IPSEC_SPSTATE_LARVAL 1
93 #define IPSEC_SPSTATE_ALIVE 2
94 #define IPSEC_SPSTATE_PCB 3
95 #define IPSEC_SPSTATE_IFNET 4
96 uint32_t priority; /* priority of this policy */
97 uint32_t id; /* It's unique number on the system. */
100 * the policy can be used without limitiation if both lifetime and
101 * validtime are zero.
102 * "lifetime" is passed by sadb_lifetime.sadb_lifetime_addtime.
103 * "validtime" is passed by sadb_lifetime.sadb_lifetime_usetime.
105 time_t created; /* time created the policy */
106 time_t lastused; /* updated every when kernel sends a packet */
107 long lifetime; /* duration of the lifetime of this policy */
108 long validtime; /* duration this policy is valid without use */
112 * PCB security policies.
113 * Application can setup private security policies for socket.
114 * Such policies can have IPSEC, BYPASS and ENTRUST type.
115 * By default, policies are set to NULL. This means that they have ENTRUST type.
116 * When application sets BYPASS or IPSEC type policy, the flags field
117 * is also updated. When flags is not set, the system could store
118 * used security policy into the sp_in/sp_out pointer to speed up further
122 struct secpolicy *sp_in;
123 struct secpolicy *sp_out;
127 #define INP_INBOUND_POLICY 0x0001
128 #define INP_OUTBOUND_POLICY 0x0002
132 /* SP acquiring list table. */
134 LIST_ENTRY(secspacq) chain;
136 struct secpolicyindex spidx;
138 time_t created; /* for lifetime */
139 int count; /* for lifetime */
140 /* XXX: here is mbuf place holder to be sent ? */
144 /* buffer size for formatted output of ipsec address */
145 #define IPSEC_ADDRSTRLEN (INET6_ADDRSTRLEN + 11)
147 /* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */
148 #define IPSEC_PORT_ANY 0
149 #define IPSEC_ULPROTO_ANY 255
150 #define IPSEC_PROTO_ANY 255
152 /* mode of security protocol */
153 /* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */
154 #define IPSEC_MODE_ANY 0 /* i.e. wildcard. */
155 #define IPSEC_MODE_TRANSPORT 1
156 #define IPSEC_MODE_TUNNEL 2
157 #define IPSEC_MODE_TCPMD5 3 /* TCP MD5 mode */
160 * Direction of security policy.
161 * NOTE: Since INVALID is used just as flag.
162 * The other are used for loop counter too.
164 #define IPSEC_DIR_ANY 0
165 #define IPSEC_DIR_INBOUND 1
166 #define IPSEC_DIR_OUTBOUND 2
167 #define IPSEC_DIR_MAX 3
168 #define IPSEC_DIR_INVALID 4
172 * IPSEC, ENTRUST and BYPASS are allowed for setsockopt() in PCB,
173 * DISCARD, IPSEC and NONE are allowed for setkey() in SPD.
174 * DISCARD and NONE are allowed for system default.
176 #define IPSEC_POLICY_DISCARD 0 /* discarding packet */
177 #define IPSEC_POLICY_NONE 1 /* through IPsec engine */
178 #define IPSEC_POLICY_IPSEC 2 /* do IPsec */
179 #define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */
180 #define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */
182 /* Security protocol level */
183 #define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */
184 #define IPSEC_LEVEL_USE 1 /* use SA if present. */
185 #define IPSEC_LEVEL_REQUIRE 2 /* require SA. */
186 #define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */
188 #define IPSEC_MANUAL_REQID_MAX 0x3fff
190 * if security policy level == unique, this id
191 * indicate to a relative SA for use, else is
193 * 1 - 0x3fff are reserved for manual keying.
194 * 0 are reserved for above reason. Others is
196 * Note that this id doesn't identify SA
199 #define IPSEC_REPLAYWSIZE 32
201 /* statistics for ipsec processing */
203 uint64_t ips_in_polvio; /* input: sec policy violation */
204 uint64_t ips_in_nomem; /* input: no memory available */
205 uint64_t ips_in_inval; /* input: generic error */
207 uint64_t ips_out_polvio; /* output: sec policy violation */
208 uint64_t ips_out_nosa; /* output: SA unavailable */
209 uint64_t ips_out_nomem; /* output: no memory available */
210 uint64_t ips_out_noroute; /* output: no route available */
211 uint64_t ips_out_inval; /* output: generic error */
212 uint64_t ips_out_bundlesa; /* output: bundled SA processed */
214 uint64_t ips_mbcoalesced; /* mbufs coalesced during clone */
215 uint64_t ips_clcoalesced; /* clusters coalesced during clone */
216 uint64_t ips_clcopied; /* clusters copied during clone */
217 uint64_t ips_mbinserted; /* mbufs inserted during makespace */
219 * Temporary statistics for performance analysis.
221 /* See where ESP/AH/IPCOMP header land in mbuf on input */
222 uint64_t ips_input_front;
223 uint64_t ips_input_middle;
224 uint64_t ips_input_end;
228 * Definitions for IPsec & Key sysctl operations.
230 #define IPSECCTL_STATS 1 /* stats */
231 #define IPSECCTL_DEF_POLICY 2
232 #define IPSECCTL_DEF_ESP_TRANSLEV 3 /* int; ESP transport mode */
233 #define IPSECCTL_DEF_ESP_NETLEV 4 /* int; ESP tunnel mode */
234 #define IPSECCTL_DEF_AH_TRANSLEV 5 /* int; AH transport mode */
235 #define IPSECCTL_DEF_AH_NETLEV 6 /* int; AH tunnel mode */
236 #if 0 /* obsolete, do not reuse */
237 #define IPSECCTL_INBOUND_CALL_IKE 7
239 #define IPSECCTL_AH_CLEARTOS 8
240 #define IPSECCTL_AH_OFFSETMASK 9
241 #define IPSECCTL_DFBIT 10
242 #define IPSECCTL_ECN 11
243 #define IPSECCTL_DEBUG 12
244 #define IPSECCTL_ESP_RANDPAD 13
247 #include <sys/counter.h>
249 struct ipsec_ctx_data;
250 #define IPSEC_INIT_CTX(_ctx, _mp, _sav, _af, _enc) do { \
251 (_ctx)->mp = (_mp); \
252 (_ctx)->sav = (_sav); \
253 (_ctx)->af = (_af); \
254 (_ctx)->enc = (_enc); \
256 int ipsec_run_hhooks(struct ipsec_ctx_data *ctx, int direction);
258 VNET_DECLARE(int, ipsec_debug);
259 #define V_ipsec_debug VNET(ipsec_debug)
262 VNET_DECLARE(int, ipsec_replay);
263 VNET_DECLARE(int, ipsec_integrity);
265 #define V_ipsec_replay VNET(ipsec_replay)
266 #define V_ipsec_integrity VNET(ipsec_integrity)
269 VNET_PCPUSTAT_DECLARE(struct ipsecstat, ipsec4stat);
270 VNET_DECLARE(int, ip4_esp_trans_deflev);
271 VNET_DECLARE(int, ip4_esp_net_deflev);
272 VNET_DECLARE(int, ip4_ah_trans_deflev);
273 VNET_DECLARE(int, ip4_ah_net_deflev);
274 VNET_DECLARE(int, ip4_ah_offsetmask);
275 VNET_DECLARE(int, ip4_ipsec_dfbit);
276 VNET_DECLARE(int, ip4_ipsec_ecn);
277 VNET_DECLARE(int, ip4_esp_randpad);
278 VNET_DECLARE(int, crypto_support);
279 VNET_DECLARE(int, natt_cksum_policy);
281 #define IPSECSTAT_INC(name) \
282 VNET_PCPUSTAT_ADD(struct ipsecstat, ipsec4stat, name, 1)
283 #define V_ip4_esp_trans_deflev VNET(ip4_esp_trans_deflev)
284 #define V_ip4_esp_net_deflev VNET(ip4_esp_net_deflev)
285 #define V_ip4_ah_trans_deflev VNET(ip4_ah_trans_deflev)
286 #define V_ip4_ah_net_deflev VNET(ip4_ah_net_deflev)
287 #define V_ip4_ah_offsetmask VNET(ip4_ah_offsetmask)
288 #define V_ip4_ipsec_dfbit VNET(ip4_ipsec_dfbit)
289 #define V_ip4_ipsec_ecn VNET(ip4_ipsec_ecn)
290 #define V_ip4_esp_randpad VNET(ip4_esp_randpad)
291 #define V_crypto_support VNET(crypto_support)
292 #define V_natt_cksum_policy VNET(natt_cksum_policy)
294 #define ipseclog(x) do { if (V_ipsec_debug) log x; } while (0)
295 /* for openbsd compatibility */
296 #define DPRINTF(x) do { if (V_ipsec_debug) printf x; } while (0)
303 union sockaddr_union;
305 int ipsec_if_input(struct mbuf *, struct secasvar *, uint32_t);
307 struct ipsecrequest *ipsec_newisr(void);
308 void ipsec_delisr(struct ipsecrequest *);
309 struct secpolicy *ipsec4_checkpolicy(const struct mbuf *, struct inpcb *,
312 u_int ipsec_get_reqlevel(struct secpolicy *, u_int);
314 void udp_ipsec_adjust_cksum(struct mbuf *, struct secasvar *, int, int);
315 int udp_ipsec_output(struct mbuf *, struct secasvar *);
316 int udp_ipsec_input(struct mbuf *, int, int);
317 int udp_ipsec_pcbctl(struct inpcb *, struct sockopt *);
319 int ipsec_chkreplay(uint32_t, struct secasvar *);
320 int ipsec_updatereplay(uint32_t, struct secasvar *);
321 int ipsec_updateid(struct secasvar *, uint64_t *, uint64_t *);
322 int ipsec_initialized(void);
324 void ipsec_setspidx_inpcb(struct inpcb *, struct secpolicyindex *, u_int);
326 void ipsec4_setsockaddrs(const struct mbuf *, union sockaddr_union *,
327 union sockaddr_union *);
328 int ipsec4_in_reject(const struct mbuf *, struct inpcb *);
329 int ipsec4_input(struct mbuf *, int, int);
330 int ipsec4_forward(struct mbuf *);
331 int ipsec4_pcbctl(struct inpcb *, struct sockopt *);
332 int ipsec4_output(struct mbuf *, struct inpcb *);
333 int ipsec4_capability(struct mbuf *, u_int);
334 int ipsec4_common_input_cb(struct mbuf *, struct secasvar *, int, int);
335 int ipsec4_process_packet(struct mbuf *, struct secpolicy *, struct inpcb *);
336 int ipsec_process_done(struct mbuf *, struct secpolicy *, struct secasvar *,
339 extern void m_checkalignment(const char* where, struct mbuf *m0,
341 extern struct mbuf *m_makespace(struct mbuf *m0, int skip, int hlen, int *off);
342 extern caddr_t m_pad(struct mbuf *m, int n);
343 extern int m_striphdr(struct mbuf *m, int skip, int hlen);
348 extern caddr_t ipsec_set_policy(char *, int);
349 extern int ipsec_get_policylen(caddr_t);
350 extern char *ipsec_dump_policy(caddr_t, char *);
351 extern const char *ipsec_strerror(void);
353 #endif /* ! KERNEL */
355 #endif /* _NETIPSEC_IPSEC_H_ */