ipsec.h revision 1.7.2.1
1 /* $NetBSD: ipsec.h,v 1.7.2.1 2004/05/10 15:01:59 tron Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/ipsec.h,v 1.2.4.1 2003/01/24 05:11:35 sam Exp $ */ 3 /* $KAME: ipsec.h,v 1.53 2001/11/20 08:32:38 itojun Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * IPsec controller part. 36 */ 37 38 #ifndef _NETIPSEC_IPSEC_H_ 39 #define _NETIPSEC_IPSEC_H_ 40 41 #if defined(_KERNEL) && !defined(_LKM) && !defined(KLD_MODULE) 42 #include "opt_inet.h" 43 #include "opt_ipsec.h" 44 #endif 45 46 #include <net/pfkeyv2.h> 47 #include <netipsec/ipsec_osdep.h> 48 #include <netipsec/keydb.h> 49 50 #ifdef _KERNEL 51 52 /* 53 * Security Policy Index 54 * Ensure that both address families in the "src" and "dst" are same. 55 * When the value of the ul_proto is ICMPv6, the port field in "src" 56 * specifies ICMPv6 type, and the port field in "dst" specifies ICMPv6 code. 57 */ 58 struct secpolicyindex { 59 u_int8_t dir; /* direction of packet flow, see blow */ 60 union sockaddr_union src; /* IP src address for SP */ 61 union sockaddr_union dst; /* IP dst address for SP */ 62 u_int8_t prefs; /* prefix length in bits for src */ 63 u_int8_t prefd; /* prefix length in bits for dst */ 64 u_int16_t ul_proto; /* upper layer Protocol */ 65 #ifdef notyet 66 uid_t uids; 67 uid_t uidd; 68 gid_t gids; 69 gid_t gidd; 70 #endif 71 }; 72 73 /* Security Policy Data Base */ 74 struct secpolicy { 75 LIST_ENTRY(secpolicy) chain; 76 77 u_int refcnt; /* reference count */ 78 struct secpolicyindex spidx; /* selector */ 79 u_int32_t id; /* It's unique number on the system. */ 80 u_int state; /* 0: dead, others: alive */ 81 #define IPSEC_SPSTATE_DEAD 0 82 #define IPSEC_SPSTATE_ALIVE 1 83 84 u_int policy; /* DISCARD, NONE or IPSEC, see keyv2.h */ 85 struct ipsecrequest *req; 86 /* pointer to the ipsec request tree, */ 87 /* if policy == IPSEC else this value == NULL.*/ 88 89 /* 90 * lifetime handler. 91 * the policy can be used without limitiation if both lifetime and 92 * validtime are zero. 93 * "lifetime" is passed by sadb_lifetime.sadb_lifetime_addtime. 94 * "validtime" is passed by sadb_lifetime.sadb_lifetime_usetime. 95 */ 96 long created; /* time created the policy */ 97 long lastused; /* updated every when kernel sends a packet */ 98 long lifetime; /* duration of the lifetime of this policy */ 99 long validtime; /* duration this policy is valid without use */ 100 }; 101 102 /* Request for IPsec */ 103 struct ipsecrequest { 104 struct ipsecrequest *next; 105 /* pointer to next structure */ 106 /* If NULL, it means the end of chain. */ 107 struct secasindex saidx;/* hint for search proper SA */ 108 /* if __ss_len == 0 then no address specified.*/ 109 u_int level; /* IPsec level defined below. */ 110 111 struct secasvar *sav; /* place holder of SA for use */ 112 struct secpolicy *sp; /* back pointer to SP */ 113 }; 114 115 /* security policy in PCB */ 116 struct inpcbpolicy { 117 struct secpolicy *sp_in; 118 struct secpolicy *sp_out; 119 int priv; /* privileged socket ? */ 120 121 #ifdef __NetBSD__ 122 /* cached policy */ 123 struct { 124 struct secpolicy *cachesp; 125 struct secpolicyindex cacheidx; 126 int cachehint; /* processing requirement hint: */ 127 #define IPSEC_PCBHINT_MAYBE 0 /* IPsec processing maybe required */ 128 #define IPSEC_PCBHINT_YES 1 /* IPsec processing is required */ 129 #define IPSEC_PCBHINT_NO 2 /* IPsec processing not required */ 130 u_int cachegen; /* spdgen when cache filled */ 131 } sp_cache[3]; /* XXX 3 == IPSEC_DIR_MAX */ 132 int sp_cacheflags; 133 #define IPSEC_PCBSP_CONNECTED 1 134 #endif /* __NetBSD__ */ 135 }; 136 137 #ifdef __NetBSD__ 138 #define IPSEC_PCB_SKIP_IPSEC(inpp, dir) \ 139 ((inpp)->sp_cache[(dir)].cachehint == IPSEC_PCBHINT_NO && \ 140 (inpp)->sp_cache[(dir)].cachegen == ipsec_spdgen) 141 #endif /* __NetBSD__ */ 142 143 /* SP acquiring list table. */ 144 struct secspacq { 145 LIST_ENTRY(secspacq) chain; 146 147 struct secpolicyindex spidx; 148 149 long created; /* for lifetime */ 150 int count; /* for lifetime */ 151 /* XXX: here is mbuf place holder to be sent ? */ 152 }; 153 #endif /* _KERNEL */ 154 155 /* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */ 156 #define IPSEC_PORT_ANY 0 157 #define IPSEC_ULPROTO_ANY 255 158 #define IPSEC_PROTO_ANY 255 159 160 /* mode of security protocol */ 161 /* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */ 162 #define IPSEC_MODE_ANY 0 /* i.e. wildcard. */ 163 #define IPSEC_MODE_TRANSPORT 1 164 #define IPSEC_MODE_TUNNEL 2 165 166 /* 167 * Direction of security policy. 168 * NOTE: Since INVALID is used just as flag. 169 * The other are used for loop counter too. 170 */ 171 #define IPSEC_DIR_ANY 0 172 #define IPSEC_DIR_INBOUND 1 173 #define IPSEC_DIR_OUTBOUND 2 174 #define IPSEC_DIR_MAX 3 175 #define IPSEC_DIR_INVALID 4 176 177 /* Policy level */ 178 /* 179 * IPSEC, ENTRUST and BYPASS are allowed for setsockopt() in PCB, 180 * DISCARD, IPSEC and NONE are allowed for setkey() in SPD. 181 * DISCARD and NONE are allowed for system default. 182 */ 183 #define IPSEC_POLICY_DISCARD 0 /* discarding packet */ 184 #define IPSEC_POLICY_NONE 1 /* through IPsec engine */ 185 #define IPSEC_POLICY_IPSEC 2 /* do IPsec */ 186 #define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */ 187 #define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */ 188 189 /* Security protocol level */ 190 #define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */ 191 #define IPSEC_LEVEL_USE 1 /* use SA if present. */ 192 #define IPSEC_LEVEL_REQUIRE 2 /* require SA. */ 193 #define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */ 194 195 #define IPSEC_MANUAL_REQID_MAX 0x3fff 196 /* 197 * if security policy level == unique, this id 198 * indicate to a relative SA for use, else is 199 * zero. 200 * 1 - 0x3fff are reserved for manual keying. 201 * 0 are reserved for above reason. Others is 202 * for kernel use. 203 * Note that this id doesn't identify SA 204 * by only itself. 205 */ 206 #define IPSEC_REPLAYWSIZE 32 207 208 #ifdef _KERNEL 209 struct ipsec_output_state { 210 struct mbuf *m; 211 struct route *ro; 212 struct sockaddr *dst; 213 }; 214 215 struct ipsec_history { 216 int ih_proto; 217 u_int32_t ih_spi; 218 }; 219 220 extern int ipsec_debug; 221 222 extern struct newipsecstat newipsecstat; 223 extern struct secpolicy ip4_def_policy; 224 extern int ip4_esp_trans_deflev; 225 extern int ip4_esp_net_deflev; 226 extern int ip4_ah_trans_deflev; 227 extern int ip4_ah_net_deflev; 228 extern int ip4_ah_cleartos; 229 extern int ip4_ah_offsetmask; 230 extern int ip4_ipsec_dfbit; 231 extern int ip4_ipsec_ecn; 232 extern int ip4_esp_randpad; 233 extern int crypto_support; 234 235 #define ipseclog(x) do { if (ipsec_debug) log x; } while (0) 236 /* for openbsd compatibility */ 237 #define DPRINTF(x) do { if (ipsec_debug) printf x; } while (0) 238 239 #ifdef __NetBSD__ 240 extern void ipsec_pcbconn __P((struct inpcbpolicy *)); 241 extern void ipsec_pcbdisconn __P((struct inpcbpolicy *)); 242 extern void ipsec_invalpcbcacheall __P((void)); 243 244 extern u_int ipsec_spdgen; 245 #endif /* __NetBSD__ */ 246 247 struct tdb_ident; 248 extern struct secpolicy *ipsec_getpolicy __P((struct tdb_ident*, u_int)); 249 struct inpcb; 250 extern struct secpolicy *ipsec4_checkpolicy __P((struct mbuf *, u_int, u_int, 251 int *, struct inpcb *)); 252 extern struct secpolicy * ipsec_getpolicybyaddr(struct mbuf *, u_int, 253 int, int *); 254 255 256 static __inline struct secpolicy* 257 ipsec4_getpolicybysock(struct mbuf *m, u_int dir, const struct socket *so, int *err) 258 { 259 panic("ipsec4_getpolicybysock"); 260 } 261 262 static __inline int 263 ipsec_copy_pcbpolicy(struct inpcbpolicy *old, struct inpcbpolicy *new) 264 { 265 /*XXX do nothing */ 266 return (0); 267 } 268 269 struct inpcb; 270 #define ipsec_init_pcbpolicy ipsec_init_policy 271 extern int ipsec_init_policy __P((struct socket *so, struct inpcbpolicy **)); 272 extern int ipsec_copy_policy 273 __P((struct inpcbpolicy *, struct inpcbpolicy *)); 274 extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *)); 275 extern int ipsec_in_reject __P((struct secpolicy *, struct mbuf *)); 276 277 extern int ipsec4_set_policy __P((struct inpcb *inp, int optname, 278 caddr_t request, size_t len, int priv)); 279 extern int ipsec4_get_policy __P((struct inpcb *inpcb, caddr_t request, 280 size_t len, struct mbuf **mp)); 281 extern int ipsec4_delete_pcbpolicy __P((struct inpcb *)); 282 extern int ipsec4_in_reject __P((struct mbuf *, struct inpcb *)); 283 /* 284 * KAME ipsec4_in_reject_so(struct mbuf*, struct so) compatibility shim 285 */ 286 #define ipsec4_in_reject_so(m, _so) \ 287 ipsec4_in_reject(m, ((_so) == NULL? NULL : sotoinpcb(_so))) 288 289 290 struct secas; 291 struct tcpcb; 292 extern int ipsec_chkreplay __P((u_int32_t, struct secasvar *)); 293 extern int ipsec_updatereplay __P((u_int32_t, struct secasvar *)); 294 295 extern size_t ipsec4_hdrsiz __P((struct mbuf *, u_int, struct inpcb *)); 296 #ifdef __FreeBSD__ 297 extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *)); 298 #else 299 extern size_t ipsec4_hdrsiz_tcp __P((struct tcpcb *)); 300 #define ipsec4_getpolicybyaddr ipsec_getpolicybyaddr 301 #endif 302 303 union sockaddr_union; 304 extern char * ipsec_address(union sockaddr_union* sa); 305 extern const char *ipsec_logsastr __P((struct secasvar *)); 306 307 extern void ipsec_dumpmbuf __P((struct mbuf *)); 308 309 /* NetBSD protosw ctlin entrypoint */ 310 extern void *esp4_ctlinput __P((int, struct sockaddr *, void *)); 311 extern void *ah4_ctlinput __P((int, struct sockaddr *, void *)); 312 313 struct m_tag; 314 extern void ipsec4_common_input(struct mbuf *m, ...); 315 extern int ipsec4_common_input_cb(struct mbuf *m, struct secasvar *sav, 316 int skip, int protoff, struct m_tag *mt); 317 extern int ipsec4_process_packet __P((struct mbuf *, struct ipsecrequest *, 318 int, int)); 319 extern int ipsec_process_done __P((struct mbuf *, struct ipsecrequest *)); 320 #define ipsec_indone(m) \ 321 (m_tag_find((m), PACKET_TAG_IPSEC_IN_DONE, NULL) != NULL) 322 323 extern struct mbuf *ipsec_copypkt __P((struct mbuf *)); 324 325 extern void m_checkalignment(const char* where, struct mbuf *m0, 326 int off, int len); 327 extern struct mbuf *m_clone(struct mbuf *m0); 328 extern struct mbuf *m_makespace(struct mbuf *m0, int skip, int hlen, int *off); 329 extern caddr_t m_pad(struct mbuf *m, int n); 330 extern int m_striphdr(struct mbuf *m, int skip, int hlen); 331 332 /* Per-socket caching of IPsec output policy */ 333 static __inline int ipsec_clear_socket_cache(struct mbuf *m) 334 { 335 return 0; 336 } 337 338 339 #endif /* _KERNEL */ 340 341 #ifndef _KERNEL 342 extern caddr_t ipsec_set_policy __P((char *, int)); 343 extern int ipsec_get_policylen __P((caddr_t)); 344 extern char *ipsec_dump_policy __P((caddr_t, char *)); 345 346 extern const char *ipsec_strerror __P((void)); 347 #endif /* !_KERNEL */ 348 349 /* External declarations of per-file init functions */ 350 INITFN void ah_attach(void); 351 INITFN void esp_attach(void); 352 INITFN void ipcomp_attach(void); 353 INITFN void ipe4_attach(void); 354 355 INITFN void ipsec_attach(void); 356 357 #endif /* _NETIPSEC_IPSEC_H_ */ 358
Indexes created Wed Oct 01 12:09:54 GMT 2025