ip_ipsp.h revision 1.115
1/* $OpenBSD: ip_ipsp.h,v 1.115 2001/06/27 04:44:03 angelos Exp $ */ 2/* 3 * The authors of this code are John Ioannidis (ji@tla.org), 4 * Angelos D. Keromytis (kermit@csd.uch.gr), 5 * Niels Provos (provos@physnet.uni-hamburg.de) and 6 * Niklas Hallqvist (niklas@appli.se). 7 * 8 * The original version of this code was written by John Ioannidis 9 * for BSD/OS in Athens, Greece, in November 1995. 10 * 11 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 12 * by Angelos D. Keromytis. 13 * 14 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 15 * and Niels Provos. 16 * 17 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist. 18 * 19 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, 20 * Angelos D. Keromytis and Niels Provos. 21 * Copyright (c) 1999 Niklas Hallqvist. 22 * Copyright (c) 2001, Angelos D. Keromytis. 23 * 24 * Permission to use, copy, and modify this software with or 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/* IPSP global definitions. */ 44 45#include <sys/types.h> 46#include <sys/queue.h> 47#include <sys/timeout.h> 48#include <netinet/in.h> 49 50union sockaddr_union { 51 struct sockaddr sa; 52 struct sockaddr_in sin; 53 struct sockaddr_in6 sin6; 54}; 55 56/* HMAC key sizes */ 57#define MD5HMAC96_KEYSIZE 16 58#define SHA1HMAC96_KEYSIZE 20 59#define RIPEMD160HMAC96_KEYSIZE 20 60 61#define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */ 62#define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */ 63#define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */ 64 65/* Authenticator lengths */ 66#define AH_MD5_ALEN 16 67#define AH_SHA1_ALEN 20 68#define AH_RMD160_ALEN 20 69#define AH_ALEN_MAX 20 /* Keep updated */ 70 71/* Reserved SPI numbers */ 72#define SPI_LOCAL_USE 0 73#define SPI_RESERVED_MIN 1 74#define SPI_RESERVED_MAX 255 75 76/* sysctl default values */ 77#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 78#define IPSEC_DEFAULT_PFS 1 79#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 80#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 81#define IPSEC_DEFAULT_SOFT_BYTES 0 82#define IPSEC_DEFAULT_EXP_BYTES 0 83#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 84#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 85#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 86#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 87#define IPSEC_DEFAULT_DEF_ENC "aes" 88#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 89#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 90 91struct sockaddr_encap { 92 u_int8_t sen_len; /* length */ 93 u_int8_t sen_family; /* PF_KEY */ 94 u_int16_t sen_type; /* see SENT_* */ 95 union { 96 struct { /* SENT_IP4 */ 97 u_int8_t Direction; 98 struct in_addr Src; 99 struct in_addr Dst; 100 u_int8_t Proto; 101 u_int16_t Sport; 102 u_int16_t Dport; 103 } Sip4; 104 105 struct { /* SENT_IP6 */ 106 u_int8_t Direction; 107 struct in6_addr Src; 108 struct in6_addr Dst; 109 u_int8_t Proto; 110 u_int16_t Sport; 111 u_int16_t Dport; 112 } Sip6; 113 114 struct ipsec_policy *PolicyHead; /* SENT_IPSP */ 115 } Sen; 116}; 117 118#define IPSP_DIRECTION_IN 0x1 119#define IPSP_DIRECTION_OUT 0x2 120 121#define sen_data Sen.Data 122#define sen_ip_src Sen.Sip4.Src 123#define sen_ip_dst Sen.Sip4.Dst 124#define sen_proto Sen.Sip4.Proto 125#define sen_sport Sen.Sip4.Sport 126#define sen_dport Sen.Sip4.Dport 127#define sen_direction Sen.Sip4.Direction 128#define sen_ip6_src Sen.Sip6.Src 129#define sen_ip6_dst Sen.Sip6.Dst 130#define sen_ip6_proto Sen.Sip6.Proto 131#define sen_ip6_sport Sen.Sip6.Sport 132#define sen_ip6_dport Sen.Sip6.Dport 133#define sen_ip6_direction Sen.Sip6.Direction 134#define sen_ipsp Sen.PolicyHead 135 136/* 137 * The "type" is really part of the address as far as the routing 138 * system is concerned. By using only one bit in the type field 139 * for each type, we sort-of make sure that different types of 140 * encapsulation addresses won't be matched against the wrong type. 141 * 142 */ 143 144#define SENT_IP4 0x0001 /* data is two struct in_addr */ 145#define SENT_IPSP 0x0002 /* data as in IP4/6 plus SPI */ 146#define SENT_IP6 0x0004 147 148#define SENT_LEN sizeof(struct sockaddr_encap) 149 150struct ipsec_ref { 151 u_int16_t ref_type; /* Subtype of data */ 152 int16_t ref_len; /* Length of data following */ 153 int ref_count; /* Reference count */ 154 int ref_malloctype; /* malloc(9) type, for freeing */ 155}; 156 157struct ipsec_acquire { 158 union sockaddr_union ipa_addr; 159 u_int32_t ipa_seq; 160 struct sockaddr_encap ipa_info; 161 struct sockaddr_encap ipa_mask; 162 struct timeout ipa_timeout; 163 struct ipsec_policy *ipa_policy; 164 TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next; 165 TAILQ_ENTRY(ipsec_acquire) ipa_next; 166}; 167 168struct ipsec_policy { 169 struct sockaddr_encap ipo_addr; 170 struct sockaddr_encap ipo_mask; 171 172 union sockaddr_union ipo_src; /* Local address to use */ 173 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed: 174 * - on output, we try to contact the 175 * remote host directly (if needed). 176 * - on input, we accept on if the 177 * inner source is the same as the 178 * outer source address, or if transport 179 * mode was used. 180 */ 181 182 u_int64_t ipo_last_searched; /* Timestamp of last lookup */ 183 184 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */ 185 u_int8_t ipo_type; /* USE/ACQUIRE/... */ 186 u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */ 187 188 struct tdb *ipo_tdb; /* Cached entry */ 189 190 struct ipsec_ref *ipo_srcid; 191 struct ipsec_ref *ipo_dstid; 192 struct ipsec_ref *ipo_local_cred; 193 struct ipsec_ref *ipo_local_auth; 194 195 TAILQ_HEAD(ipo_acquires_head, ipsec_acquire) ipo_acquires; /* List of acquires */ 196 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List TDB policies */ 197 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */ 198}; 199 200#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 201#define IPSP_POLICY_SOCKET 0x0001 /* Socket-attached policy */ 202#define IPSP_POLICY_STATIC 0x0002 /* Static policy */ 203 204#define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */ 205#define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */ 206#define IPSP_IPSEC_REQUIRE 2 /* Require SA */ 207#define IPSP_PERMIT 3 /* Permit traffic through */ 208#define IPSP_DENY 4 /* Deny traffic */ 209#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */ 210 211/* Notification types */ 212#define NOTIFY_SOFT_EXPIRE 0 /* Soft expiration of SA */ 213#define NOTIFY_HARD_EXPIRE 1 /* Hard expiration of SA */ 214#define NOTIFY_REQUEST_SA 2 /* Establish an SA */ 215 216#define NOTIFY_SATYPE_CONF 1 /* SA should do encryption */ 217#define NOTIFY_SATYPE_AUTH 2 /* SA should do authentication */ 218#define NOTIFY_SATYPE_TUNNEL 4 /* SA should use tunneling */ 219 220/* Authentication types */ 221#define IPSP_AUTH_NONE 0 222#define IPSP_AUTH_PASSPHRASE 1 223#define IPSP_AUTH_RSA 2 224 225/* Credential types */ 226#define IPSP_CRED_NONE 0 227#define IPSP_CRED_KEYNOTE 1 228#define IPSP_CRED_X509 2 229 230/* Identity types */ 231#define IPSP_IDENTITY_NONE 0 232#define IPSP_IDENTITY_PREFIX 1 233#define IPSP_IDENTITY_FQDN 2 234#define IPSP_IDENTITY_USERFQDN 3 235#define IPSP_IDENTITY_CONNECTION 4 236 237/* 238 * For encapsulation routes are possible not only for the destination 239 * address but also for the protocol, source and destination ports 240 * if available 241 */ 242 243struct route_enc { 244 struct rtentry *re_rt; 245 struct sockaddr_encap re_dst; 246}; 247 248struct tdb { /* tunnel descriptor block */ 249 /* 250 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 251 * one keyed on dst/sproto, and one keyed on src/sproto. The first 252 * is used for finding a specific TDB, the second for finding TDBs 253 * TDBs for outgoing policy matching, and the third for incoming 254 * policy matching. The following three fields maintain the hash 255 * queues in those three tables. 256 */ 257 struct tdb *tdb_hnext; /* dst/spi/sproto table */ 258 struct tdb *tdb_anext; /* dst/sproto table */ 259 struct tdb *tdb_snext; /* src/sproto table */ 260 struct tdb *tdb_inext; 261 struct tdb *tdb_onext; 262 263 struct xformsw *tdb_xform; /* Transform to use */ 264 struct enc_xform *tdb_encalgxform; /* Enc algorithm */ 265 struct auth_hash *tdb_authalgxform; /* Auth algorithm */ 266 267#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 268#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 269#define TDBF_BYTES 0x00004 /* Check the byte counters */ 270#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 271#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 272#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 273#define TDBF_HALFIV 0x00040 /* Use half-length IV (ESP old only) */ 274#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 275#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 276#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 277#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 278#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 279#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 280#define TDBF_NOREPLAY 0x02000 /* No replay counter present */ 281#define TDBF_RANDOMPADDING 0x04000 /* Random data in the ESP padding */ 282#define TDBF_SKIPCRYPTO 0x08000 /* Skip actual crypto processing */ 283#define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */ 284 285 u_int32_t tdb_flags; /* Flags related to this TDB */ 286 287 struct timeout tdb_timer_tmo; 288 struct timeout tdb_first_tmo; 289 struct timeout tdb_stimer_tmo; 290 struct timeout tdb_sfirst_tmo; 291 292 u_int32_t tdb_seq; /* Tracking number for PFKEY */ 293 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 294 u_int32_t tdb_soft_allocations; /* Expiration warning */ 295 u_int32_t tdb_cur_allocations; /* Total number of allocs */ 296 297 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 298 u_int64_t tdb_soft_bytes; /* Expiration warning */ 299 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 300 301 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 302 u_int64_t tdb_soft_timeout; /* Send soft-expire warning */ 303 u_int64_t tdb_established; /* When was SPI established */ 304 305 u_int64_t tdb_first_use; /* When was it first used */ 306 u_int64_t tdb_soft_first_use; /* Soft warning */ 307 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 308 * tdb_exp_first_use <= curtime 309 */ 310 311 u_int64_t tdb_last_used; /* When was this SA last used */ 312 u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */ 313 314 u_int64_t tdb_cryptoid; /* Crypto session ID */ 315 316 u_int32_t tdb_spi; /* SPI */ 317 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 318 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 319 u_int16_t tdb_ivlen; /* IV length */ 320 u_int8_t tdb_sproto; /* IPsec protocol */ 321 u_int8_t tdb_wnd; /* Replay window */ 322 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 323 324 union sockaddr_union tdb_dst; /* Destination address */ 325 union sockaddr_union tdb_src; /* Source address */ 326 union sockaddr_union tdb_proxy; 327 328 u_int8_t *tdb_amxkey; /* Raw authentication key */ 329 u_int8_t *tdb_emxkey; /* Raw encryption key */ 330 331 u_int32_t tdb_rpl; /* Replay counter */ 332 u_int32_t tdb_bitmap; /* Used for replay sliding window */ 333 u_int32_t tdb_initial; /* Initial replay value */ 334 335 u_int32_t tdb_epoch; /* Used by the kernfs interface */ 336 337 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 338 339 struct ipsec_ref *tdb_local_cred; 340 struct ipsec_ref *tdb_remote_cred; 341 struct ipsec_ref *tdb_srcid; /* Source ID for this SA */ 342 struct ipsec_ref *tdb_dstid; /* Destination ID for this SA */ 343 struct ipsec_ref *tdb_local_auth;/* Local authentication material */ 344 struct ipsec_ref *tdb_remote_auth;/* Remote authentication material */ 345 346 u_int32_t tdb_mtu; /* MTU at this point in the chain */ 347 u_int64_t tdb_mtutimeout; /* When to ignore this entry */ 348 349 TAILQ_HEAD(tdb_inp_head_in, inpcb) tdb_inp_in; 350 TAILQ_HEAD(tdb_inp_head_out, inpcb) tdb_inp_out; 351 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; 352}; 353 354struct tdb_ident { 355 u_int32_t spi; 356 union sockaddr_union dst; 357 u_int8_t proto; 358}; 359 360struct tdb_crypto { 361 u_int32_t tc_spi; 362 union sockaddr_union tc_dst; 363 u_int8_t tc_proto; 364 int tc_protoff; 365 int tc_skip; 366 caddr_t tc_ptr; 367}; 368 369struct ipsecinit { 370 u_int8_t *ii_enckey; 371 u_int8_t *ii_authkey; 372 u_int16_t ii_enckeylen; 373 u_int16_t ii_authkeylen; 374 u_int8_t ii_encalg; 375 u_int8_t ii_authalg; 376}; 377 378struct xformsw { 379 u_short xf_type; /* Unique ID of xform */ 380 u_short xf_flags; /* flags (see below) */ 381 char *xf_name; /* human-readable name */ 382 int (*xf_attach)(void); /* called at config time */ 383 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *); 384 int (*xf_zeroize)(struct tdb *); /* termination */ 385 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */ 386 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, 387 int, int); /* output */ 388}; 389 390/* xform IDs */ 391#define XF_IP4 1 /* IP inside IP */ 392#define XF_AH 2 /* AH */ 393#define XF_ESP 3 /* ESP */ 394#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 395 396/* xform attributes */ 397#define XFT_AUTH 0x0001 398#define XFT_CONF 0x0100 399 400#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 401#define IPSEC_KERNFS_BUFSIZE 4096 402 403#if BYTE_ORDER == LITTLE_ENDIAN 404static __inline u_int64_t 405htonq(u_int64_t q) 406{ 407 register u_int32_t u, l; 408 u = q >> 32; 409 l = (u_int32_t) q; 410 411 return htonl(u) | ((u_int64_t)htonl(l) << 32); 412} 413 414#define ntohq(_x) htonq(_x) 415 416#elif BYTE_ORDER == BIG_ENDIAN 417 418#define htonq(_x) (_x) 419#define ntohq(_x) htonq(_x) 420 421#else 422#error "Please fix <machine/endian.h>" 423#endif 424 425#ifdef _KERNEL 426 427/* 428 * Protects all tdb lists. 429 * Must at least be splsoftnet (note: do not use splsoftclock as it is 430 * special on some architectures, assuming it is always an spl lowering 431 * operation). 432 */ 433#define spltdb splsoftnet 434 435extern int encdebug; 436extern int ipsec_acl; 437extern int ipsec_keep_invalid; 438extern int ipsec_in_use; 439extern u_int64_t ipsec_last_added; 440extern int ipsec_require_pfs; 441extern int ipsec_expire_acquire; 442 443extern int ipsec_policy_pool_initialized; 444 445extern int ipsec_soft_allocations; 446extern int ipsec_exp_allocations; 447extern int ipsec_soft_bytes; 448extern int ipsec_exp_bytes; 449extern int ipsec_soft_timeout; 450extern int ipsec_exp_timeout; 451extern int ipsec_soft_first_use; 452extern int ipsec_exp_first_use; 453extern char ipsec_def_enc[]; 454extern char ipsec_def_auth[]; 455 456extern struct enc_xform enc_xform_des; 457extern struct enc_xform enc_xform_3des; 458extern struct enc_xform enc_xform_blf; 459extern struct enc_xform enc_xform_cast5; 460extern struct enc_xform enc_xform_skipjack; 461 462extern struct auth_hash auth_hash_hmac_md5_96; 463extern struct auth_hash auth_hash_hmac_sha1_96; 464extern struct auth_hash auth_hash_hmac_ripemd_160_96; 465 466extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 467extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head; 468 469extern struct xformsw xformsw[], *xformswNXFORMSW; 470 471/* Check if a given tdb has encryption, authentication and/or tunneling */ 472#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0) | \ 473 ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0)) 474 475/* Traverse spi chain and get attributes */ 476 477#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\ 478 int s = spltdb(); \ 479 struct tdb *tmptdb = (TDBP); \ 480 \ 481 (have) = 0; \ 482 while (tmptdb && tmptdb->tdb_xform) { \ 483 if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \ 484 break; \ 485 (have) |= TDB_ATTRIB(tmptdb); \ 486 tmptdb = tmptdb->TDB_DIR; \ 487 } \ 488 splx(s); \ 489} while (0) 490 491/* Misc. */ 492extern char *inet_ntoa4(struct in_addr); 493extern char *ipsp_address(union sockaddr_union); 494 495/* TDB management routines */ 496extern void tdb_add_inp(struct tdb *, struct inpcb *, int); 497extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *, 498 union sockaddr_union *, u_int8_t, int *); 499extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t); 500extern struct tdb *gettdbbyaddr(union sockaddr_union *, struct ipsec_policy *, 501 struct mbuf *, int); 502extern struct tdb *gettdbbysrc(union sockaddr_union *, struct ipsec_policy *, 503 struct mbuf *, int); 504extern void puttdb(struct tdb *); 505extern void tdb_delete(struct tdb *); 506extern struct tdb *tdb_alloc(void); 507extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 508extern int tdb_walk(int (*)(struct tdb *, void *, int), void *); 509 510/* XF_IP4 */ 511extern int ipe4_attach(void); 512extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *); 513extern int ipe4_zeroize(struct tdb *); 514extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 515extern void ipe4_input __P((struct mbuf *, ...)); 516extern void ipip_input __P((struct mbuf *, int)); 517 518#ifdef INET 519extern void ip4_input __P((struct mbuf *, ...)); 520#endif /* INET */ 521 522#ifdef INET6 523extern int ip4_input6 __P((struct mbuf **, int *, int)); 524#endif /* INET */ 525 526/* XF_ETHERIP */ 527extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **, 528 int, int); 529extern void etherip_input __P((struct mbuf *, ...)); 530 531/* XF_AH */ 532extern int ah_attach(void); 533extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *); 534extern int ah_zeroize(struct tdb *); 535extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 536extern int ah_output_cb(void *); 537extern int ah_input(struct mbuf *, struct tdb *, int, int); 538extern int ah_input_cb(void *); 539extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 540extern int ah_massage_headers(struct mbuf **, int, int, int, int); 541 542#ifdef INET 543extern void ah4_input __P((struct mbuf *, ...)); 544extern int ah4_input_cb __P((struct mbuf *, ...)); 545extern void *ah4_ctlinput __P((int, struct sockaddr *, void *)); 546#endif /* INET */ 547 548#ifdef INET6 549extern int ah6_input __P((struct mbuf **, int *, int)); 550extern int ah6_input_cb __P((struct mbuf *, int, int)); 551#endif /* INET6 */ 552 553/* XF_ESP */ 554extern int esp_attach(void); 555extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 556extern int esp_zeroize(struct tdb *); 557extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 558extern int esp_output_cb(void *); 559extern int esp_input(struct mbuf *, struct tdb *, int, int); 560extern int esp_input_cb(void *); 561extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 562 563#ifdef INET 564extern void esp4_input __P((struct mbuf *, ...)); 565extern int esp4_input_cb __P((struct mbuf *, ...)); 566extern void *esp4_ctlinput __P((int, struct sockaddr *, void *)); 567#endif /* INET */ 568 569#ifdef INET6 570extern int esp6_input __P((struct mbuf **, int *, int)); 571extern int esp6_input_cb __P((struct mbuf *, int, int)); 572#endif /* INET6 */ 573 574/* XF_TCPSIGNATURE */ 575extern int tcp_signature_tdb_attach __P((void)); 576extern int tcp_signature_tdb_init __P((struct tdb *, struct xformsw *, 577 struct ipsecinit *)); 578extern int tcp_signature_tdb_zeroize __P((struct tdb *)); 579extern int tcp_signature_tdb_input __P((struct mbuf *, struct tdb *, int, 580 int)); 581extern int tcp_signature_tdb_output __P((struct mbuf *, struct tdb *, 582 struct mbuf **, int, int)); 583 584/* Padding */ 585extern caddr_t m_pad(struct mbuf *, int); 586 587/* Replay window */ 588extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t, 589 u_int32_t *); 590 591extern unsigned char ipseczeroes[]; 592 593/* Packet processing */ 594extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int); 595extern int ipsp_process_done(struct mbuf *, struct tdb *); 596extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int, 597 struct tdb *, struct inpcb *); 598extern struct tdb *ipsp_spd_inp(struct mbuf *, int, int, int *, int, 599 struct tdb *, struct inpcb *, struct ipsec_policy *); 600extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int, 601 struct m_tag *); 602extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *, 603 union sockaddr_union *, struct sockaddr_encap *, struct mbuf *); 604extern struct ipsec_policy *ipsec_add_policy(struct sockaddr_encap *, 605 struct sockaddr_encap *, union sockaddr_union *, int, int); 606extern int ipsec_delete_policy(struct ipsec_policy *); 607extern struct ipsec_acquire *ipsp_pending_acquire(struct ipsec_policy *, 608 union sockaddr_union *); 609extern void ipsp_delete_acquire(void *); 610extern int ipsp_is_unspecified(union sockaddr_union); 611extern void ipsp_reffree(struct ipsec_ref *); 612extern void ipsp_skipcrypto_unmark(struct tdb_ident *); 613extern void ipsp_skipcrypto_mark(struct tdb_ident *); 614extern struct m_tag *ipsp_parse_headers(struct mbuf *, int, u_int8_t); 615extern int ipsp_ref_match(struct ipsec_ref *, struct ipsec_ref *); 616extern ssize_t ipsec_hdrsz(struct tdb *); 617extern void ipsec_adjust_mtu(struct mbuf *, u_int32_t); 618extern int ipsp_print_tdb(struct tdb *, char *); 619extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 620#endif /* _KERNEL */ 621#endif /* _NETINET_IPSP_H_ */ 622