ip_ipsp.h revision 1.118
1/* $OpenBSD: ip_ipsp.h,v 1.118 2001/08/19 06:31:56 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/* Reserved CPI numbers */ 77#define CPI_RESERVED_MIN 1 78#define CPI_RESERVED_MAX 255 79#define CPI_PRIVATE_MIN 61440 80#define CPI_PRIVATE_MAX 65535 81 82/* sysctl default values */ 83#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 84#define IPSEC_DEFAULT_PFS 1 85#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 86#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 87#define IPSEC_DEFAULT_SOFT_BYTES 0 88#define IPSEC_DEFAULT_EXP_BYTES 0 89#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 90#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 91#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 92#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 93#define IPSEC_DEFAULT_DEF_ENC "aes" 94#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 95#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 96#define IPSEC_DEFAULT_DEF_COMP "deflate" 97 98struct sockaddr_encap { 99 u_int8_t sen_len; /* length */ 100 u_int8_t sen_family; /* PF_KEY */ 101 u_int16_t sen_type; /* see SENT_* */ 102 union { 103 struct { /* SENT_IP4 */ 104 u_int8_t Direction; 105 struct in_addr Src; 106 struct in_addr Dst; 107 u_int8_t Proto; 108 u_int16_t Sport; 109 u_int16_t Dport; 110 } Sip4; 111 112 struct { /* SENT_IP6 */ 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_ref { 158 u_int16_t ref_type; /* Subtype of data */ 159 int16_t ref_len; /* Length of data following */ 160 int ref_count; /* Reference count */ 161 int ref_malloctype; /* malloc(9) type, for freeing */ 162}; 163 164struct ipsec_acquire { 165 union sockaddr_union ipa_addr; 166 u_int32_t ipa_seq; 167 struct sockaddr_encap ipa_info; 168 struct sockaddr_encap ipa_mask; 169 struct timeout ipa_timeout; 170 struct ipsec_policy *ipa_policy; 171 TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next; 172 TAILQ_ENTRY(ipsec_acquire) ipa_next; 173}; 174 175struct ipsec_policy { 176 struct sockaddr_encap ipo_addr; 177 struct sockaddr_encap ipo_mask; 178 179 union sockaddr_union ipo_src; /* Local address to use */ 180 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed: 181 * - on output, we try to contact the 182 * remote host directly (if needed). 183 * - on input, we accept on if the 184 * inner source is the same as the 185 * outer source address, or if transport 186 * mode was used. 187 */ 188 189 u_int64_t ipo_last_searched; /* Timestamp of last lookup */ 190 191 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */ 192 u_int8_t ipo_type; /* USE/ACQUIRE/... */ 193 u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */ 194 195 struct tdb *ipo_tdb; /* Cached entry */ 196 197 struct ipsec_ref *ipo_srcid; 198 struct ipsec_ref *ipo_dstid; 199 struct ipsec_ref *ipo_local_cred; 200 struct ipsec_ref *ipo_local_auth; 201 202 TAILQ_HEAD(ipo_acquires_head, ipsec_acquire) ipo_acquires; /* List of acquires */ 203 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List TDB policies */ 204 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */ 205}; 206 207#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 208#define IPSP_POLICY_SOCKET 0x0001 /* Socket-attached policy */ 209#define IPSP_POLICY_STATIC 0x0002 /* Static policy */ 210 211#define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */ 212#define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */ 213#define IPSP_IPSEC_REQUIRE 2 /* Require SA */ 214#define IPSP_PERMIT 3 /* Permit traffic through */ 215#define IPSP_DENY 4 /* Deny traffic */ 216#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */ 217 218/* Notification types */ 219#define NOTIFY_SOFT_EXPIRE 0 /* Soft expiration of SA */ 220#define NOTIFY_HARD_EXPIRE 1 /* Hard expiration of SA */ 221#define NOTIFY_REQUEST_SA 2 /* Establish an SA */ 222 223#define NOTIFY_SATYPE_CONF 1 /* SA should do encryption */ 224#define NOTIFY_SATYPE_AUTH 2 /* SA should do authentication */ 225#define NOTIFY_SATYPE_TUNNEL 4 /* SA should use tunneling */ 226#define NOTIFY_SATYPE_COMP 5 /* SA (IPCA) should use compression */ 227 228/* Authentication types */ 229#define IPSP_AUTH_NONE 0 230#define IPSP_AUTH_PASSPHRASE 1 231#define IPSP_AUTH_RSA 2 232 233/* Credential types */ 234#define IPSP_CRED_NONE 0 235#define IPSP_CRED_KEYNOTE 1 236#define IPSP_CRED_X509 2 237 238/* Identity types */ 239#define IPSP_IDENTITY_NONE 0 240#define IPSP_IDENTITY_PREFIX 1 241#define IPSP_IDENTITY_FQDN 2 242#define IPSP_IDENTITY_USERFQDN 3 243#define IPSP_IDENTITY_CONNECTION 4 244 245/* 246 * For encapsulation routes are possible not only for the destination 247 * address but also for the protocol, source and destination ports 248 * if available 249 */ 250 251struct route_enc { 252 struct rtentry *re_rt; 253 struct sockaddr_encap re_dst; 254}; 255 256struct tdb { /* tunnel descriptor block */ 257 /* 258 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 259 * one keyed on dst/sproto, and one keyed on src/sproto. The first 260 * is used for finding a specific TDB, the second for finding TDBs 261 * TDBs for outgoing policy matching, and the third for incoming 262 * policy matching. The following three fields maintain the hash 263 * queues in those three tables. 264 */ 265 struct tdb *tdb_hnext; /* dst/spi/sproto table */ 266 struct tdb *tdb_anext; /* dst/sproto table */ 267 struct tdb *tdb_snext; /* src/sproto table */ 268 struct tdb *tdb_inext; 269 struct tdb *tdb_onext; 270 271 struct xformsw *tdb_xform; /* Transform to use */ 272 struct enc_xform *tdb_encalgxform; /* Enc algorithm */ 273 struct auth_hash *tdb_authalgxform; /* Auth algorithm */ 274 struct comp_algo *tdb_compalgxform; /* Compression algo */ 275 276#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 277#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 278#define TDBF_BYTES 0x00004 /* Check the byte counters */ 279#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 280#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 281#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 282#define TDBF_HALFIV 0x00040 /* Use half-length IV (ESP old only) */ 283#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 284#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 285#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 286#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 287#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 288#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 289#define TDBF_NOREPLAY 0x02000 /* No replay counter present */ 290#define TDBF_RANDOMPADDING 0x04000 /* Random data in the ESP padding */ 291#define TDBF_SKIPCRYPTO 0x08000 /* Skip actual crypto processing */ 292#define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */ 293 294 u_int32_t tdb_flags; /* Flags related to this TDB */ 295 296 struct timeout tdb_timer_tmo; 297 struct timeout tdb_first_tmo; 298 struct timeout tdb_stimer_tmo; 299 struct timeout tdb_sfirst_tmo; 300 301 u_int32_t tdb_seq; /* Tracking number for PFKEY */ 302 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 303 u_int32_t tdb_soft_allocations; /* Expiration warning */ 304 u_int32_t tdb_cur_allocations; /* Total number of allocs */ 305 306 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 307 u_int64_t tdb_soft_bytes; /* Expiration warning */ 308 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 309 310 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 311 u_int64_t tdb_soft_timeout; /* Send soft-expire warning */ 312 u_int64_t tdb_established; /* When was SPI established */ 313 314 u_int64_t tdb_first_use; /* When was it first used */ 315 u_int64_t tdb_soft_first_use; /* Soft warning */ 316 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 317 * tdb_exp_first_use <= curtime 318 */ 319 320 u_int64_t tdb_last_used; /* When was this SA last used */ 321 u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */ 322 323 u_int64_t tdb_cryptoid; /* Crypto session ID */ 324 325 u_int32_t tdb_spi; /* SPI */ 326 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 327 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 328 u_int16_t tdb_ivlen; /* IV length */ 329 u_int8_t tdb_sproto; /* IPsec protocol */ 330 u_int8_t tdb_wnd; /* Replay window */ 331 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 332 333 union sockaddr_union tdb_dst; /* Destination address */ 334 union sockaddr_union tdb_src; /* Source address */ 335 union sockaddr_union tdb_proxy; 336 337 u_int8_t *tdb_amxkey; /* Raw authentication key */ 338 u_int8_t *tdb_emxkey; /* Raw encryption key */ 339 340 u_int32_t tdb_rpl; /* Replay counter */ 341 u_int32_t tdb_bitmap; /* Used for replay sliding window */ 342 u_int32_t tdb_initial; /* Initial replay value */ 343 344 u_int32_t tdb_epoch; /* Used by the kernfs interface */ 345 346 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 347 348 struct ipsec_ref *tdb_local_cred; 349 struct ipsec_ref *tdb_remote_cred; 350 struct ipsec_ref *tdb_srcid; /* Source ID for this SA */ 351 struct ipsec_ref *tdb_dstid; /* Destination ID for this SA */ 352 struct ipsec_ref *tdb_local_auth;/* Local authentication material */ 353 struct ipsec_ref *tdb_remote_auth;/* Remote authentication material */ 354 355 u_int32_t tdb_mtu; /* MTU at this point in the chain */ 356 u_int64_t tdb_mtutimeout; /* When to ignore this entry */ 357 358 TAILQ_HEAD(tdb_inp_head_in, inpcb) tdb_inp_in; 359 TAILQ_HEAD(tdb_inp_head_out, inpcb) tdb_inp_out; 360 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; 361}; 362 363struct tdb_ident { 364 u_int32_t spi; 365 union sockaddr_union dst; 366 u_int8_t proto; 367}; 368 369struct tdb_crypto { 370 u_int32_t tc_spi; 371 union sockaddr_union tc_dst; 372 u_int8_t tc_proto; 373 int tc_protoff; 374 int tc_skip; 375 caddr_t tc_ptr; 376}; 377 378struct ipsecinit { 379 u_int8_t *ii_enckey; 380 u_int8_t *ii_authkey; 381 u_int16_t ii_enckeylen; 382 u_int16_t ii_authkeylen; 383 u_int8_t ii_encalg; 384 u_int8_t ii_authalg; 385 u_int8_t ii_compalg; 386}; 387 388struct xformsw { 389 u_short xf_type; /* Unique ID of xform */ 390 u_short xf_flags; /* flags (see below) */ 391 char *xf_name; /* human-readable name */ 392 int (*xf_attach)(void); /* called at config time */ 393 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *); 394 int (*xf_zeroize)(struct tdb *); /* termination */ 395 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */ 396 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, 397 int, int); /* output */ 398}; 399 400/* xform IDs */ 401#define XF_IP4 1 /* IP inside IP */ 402#define XF_AH 2 /* AH */ 403#define XF_ESP 3 /* ESP */ 404#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 405#define XF_IPCOMP 6 /* IPCOMP */ 406 407/* xform attributes */ 408#define XFT_AUTH 0x0001 409#define XFT_CONF 0x0100 410#define XFT_COMP 0x1000 411 412#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 413#define IPSEC_KERNFS_BUFSIZE 4096 414 415#if BYTE_ORDER == LITTLE_ENDIAN 416static __inline u_int64_t 417htonq(u_int64_t q) 418{ 419 register u_int32_t u, l; 420 u = q >> 32; 421 l = (u_int32_t) q; 422 423 return htonl(u) | ((u_int64_t)htonl(l) << 32); 424} 425 426#define ntohq(_x) htonq(_x) 427 428#elif BYTE_ORDER == BIG_ENDIAN 429 430#define htonq(_x) (_x) 431#define ntohq(_x) htonq(_x) 432 433#else 434#error "Please fix <machine/endian.h>" 435#endif 436 437#ifdef _KERNEL 438 439/* 440 * Protects all tdb lists. 441 * Must at least be splsoftnet (note: do not use splsoftclock as it is 442 * special on some architectures, assuming it is always an spl lowering 443 * operation). 444 */ 445#define spltdb splsoftnet 446 447extern int encdebug; 448extern int ipsec_acl; 449extern int ipsec_keep_invalid; 450extern int ipsec_in_use; 451extern u_int64_t ipsec_last_added; 452extern int ipsec_require_pfs; 453extern int ipsec_expire_acquire; 454 455extern int ipsec_policy_pool_initialized; 456 457extern int ipsec_soft_allocations; 458extern int ipsec_exp_allocations; 459extern int ipsec_soft_bytes; 460extern int ipsec_exp_bytes; 461extern int ipsec_soft_timeout; 462extern int ipsec_exp_timeout; 463extern int ipsec_soft_first_use; 464extern int ipsec_exp_first_use; 465extern char ipsec_def_enc[]; 466extern char ipsec_def_auth[]; 467extern char ipsec_def_comp[]; 468 469extern struct enc_xform enc_xform_des; 470extern struct enc_xform enc_xform_3des; 471extern struct enc_xform enc_xform_blf; 472extern struct enc_xform enc_xform_cast5; 473extern struct enc_xform enc_xform_skipjack; 474 475extern struct auth_hash auth_hash_hmac_md5_96; 476extern struct auth_hash auth_hash_hmac_sha1_96; 477extern struct auth_hash auth_hash_hmac_ripemd_160_96; 478 479extern struct comp_algo comp_algo_deflate; 480 481extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 482extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head; 483 484extern struct xformsw xformsw[], *xformswNXFORMSW; 485 486/* Check if a given tdb has encryption, authentication and/or tunneling */ 487#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0) | \ 488 ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0) | \ 489 ((x)->tdb_compalgxform ? NOTIFY_SATYPE_COMP : 0)) 490 491/* Traverse spi chain and get attributes */ 492 493#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\ 494 int s = spltdb(); \ 495 struct tdb *tmptdb = (TDBP); \ 496 \ 497 (have) = 0; \ 498 while (tmptdb && tmptdb->tdb_xform) { \ 499 if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \ 500 break; \ 501 (have) |= TDB_ATTRIB(tmptdb); \ 502 tmptdb = tmptdb->TDB_DIR; \ 503 } \ 504 splx(s); \ 505} while (0) 506 507/* Misc. */ 508extern char *inet_ntoa4(struct in_addr); 509extern char *ipsp_address(union sockaddr_union); 510 511/* TDB management routines */ 512extern void tdb_add_inp(struct tdb *, struct inpcb *, int); 513extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *, 514 union sockaddr_union *, u_int8_t, int *); 515extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t); 516extern struct tdb *gettdbbyaddr(union sockaddr_union *, struct ipsec_policy *, 517 struct mbuf *, int); 518extern struct tdb *gettdbbysrc(union sockaddr_union *, struct ipsec_policy *, 519 struct mbuf *, int); 520extern void puttdb(struct tdb *); 521extern void tdb_delete(struct tdb *); 522extern struct tdb *tdb_alloc(void); 523extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 524extern int tdb_walk(int (*)(struct tdb *, void *, int), void *); 525 526/* XF_IP4 */ 527extern int ipe4_attach(void); 528extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *); 529extern int ipe4_zeroize(struct tdb *); 530extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 531extern void ipe4_input __P((struct mbuf *, ...)); 532extern void ipip_input __P((struct mbuf *, int, struct ifnet *)); 533 534#ifdef INET 535extern void ip4_input __P((struct mbuf *, ...)); 536#endif /* INET */ 537 538#ifdef INET6 539extern int ip4_input6 __P((struct mbuf **, int *, int)); 540#endif /* INET */ 541 542/* XF_ETHERIP */ 543extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **, 544 int, int); 545extern void etherip_input __P((struct mbuf *, ...)); 546 547/* XF_AH */ 548extern int ah_attach(void); 549extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *); 550extern int ah_zeroize(struct tdb *); 551extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 552extern int ah_output_cb(void *); 553extern int ah_input(struct mbuf *, struct tdb *, int, int); 554extern int ah_input_cb(void *); 555extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 556extern int ah_massage_headers(struct mbuf **, int, int, int, int); 557 558#ifdef INET 559extern void ah4_input __P((struct mbuf *, ...)); 560extern int ah4_input_cb __P((struct mbuf *, ...)); 561extern void *ah4_ctlinput __P((int, struct sockaddr *, void *)); 562#endif /* INET */ 563 564#ifdef INET6 565extern int ah6_input __P((struct mbuf **, int *, int)); 566extern int ah6_input_cb __P((struct mbuf *, int, int)); 567#endif /* INET6 */ 568 569/* XF_ESP */ 570extern int esp_attach(void); 571extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 572extern int esp_zeroize(struct tdb *); 573extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 574extern int esp_output_cb(void *); 575extern int esp_input(struct mbuf *, struct tdb *, int, int); 576extern int esp_input_cb(void *); 577extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 578 579#ifdef INET 580extern void esp4_input __P((struct mbuf *, ...)); 581extern int esp4_input_cb __P((struct mbuf *, ...)); 582extern void *esp4_ctlinput __P((int, struct sockaddr *, void *)); 583#endif /* INET */ 584 585#ifdef INET6 586extern int esp6_input __P((struct mbuf **, int *, int)); 587extern int esp6_input_cb __P((struct mbuf *, int, int)); 588#endif /* INET6 */ 589 590/* XF_IPCOMP */ 591extern int ipcomp_attach(void); 592extern int ipcomp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 593extern int ipcomp_zeroize(struct tdb *); 594extern int ipcomp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 595extern int ipcomp_output_cb(void *); 596extern int ipcomp_input(struct mbuf *, struct tdb *, int, int); 597extern int ipcomp_input_cb(void *); 598extern int ipcomp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 599 600#ifdef INET 601extern void ipcomp4_input __P((struct mbuf *, ...)); 602extern int ipcomp4_input_cb __P((struct mbuf *, ...)); 603#endif /* INET */ 604 605#ifdef INET6 606extern int ipcomp6_input __P((struct mbuf **, int *, int)); 607extern int ipcomp6_input_cb __P((struct mbuf *, int, int)); 608#endif /* INET6 */ 609 610/* XF_TCPSIGNATURE */ 611extern int tcp_signature_tdb_attach __P((void)); 612extern int tcp_signature_tdb_init __P((struct tdb *, struct xformsw *, 613 struct ipsecinit *)); 614extern int tcp_signature_tdb_zeroize __P((struct tdb *)); 615extern int tcp_signature_tdb_input __P((struct mbuf *, struct tdb *, int, 616 int)); 617extern int tcp_signature_tdb_output __P((struct mbuf *, struct tdb *, 618 struct mbuf **, int, int)); 619 620/* Padding */ 621extern caddr_t m_pad(struct mbuf *, int); 622 623/* Replay window */ 624extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t, 625 u_int32_t *); 626 627extern unsigned char ipseczeroes[]; 628 629/* Packet processing */ 630extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int); 631extern int ipsp_process_done(struct mbuf *, struct tdb *); 632extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int, 633 struct tdb *, struct inpcb *); 634extern struct tdb *ipsp_spd_inp(struct mbuf *, int, int, int *, int, 635 struct tdb *, struct inpcb *, struct ipsec_policy *); 636extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int, 637 struct m_tag *); 638extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *, 639 union sockaddr_union *, struct sockaddr_encap *, struct mbuf *); 640extern struct ipsec_policy *ipsec_add_policy(struct sockaddr_encap *, 641 struct sockaddr_encap *, union sockaddr_union *, int, int); 642extern int ipsec_delete_policy(struct ipsec_policy *); 643extern struct ipsec_acquire *ipsp_pending_acquire(struct ipsec_policy *, 644 union sockaddr_union *); 645extern void ipsp_delete_acquire(void *); 646extern int ipsp_is_unspecified(union sockaddr_union); 647extern void ipsp_reffree(struct ipsec_ref *); 648extern void ipsp_skipcrypto_unmark(struct tdb_ident *); 649extern void ipsp_skipcrypto_mark(struct tdb_ident *); 650extern struct m_tag *ipsp_parse_headers(struct mbuf *, int, u_int8_t); 651extern int ipsp_ref_match(struct ipsec_ref *, struct ipsec_ref *); 652extern ssize_t ipsec_hdrsz(struct tdb *); 653extern void ipsec_adjust_mtu(struct mbuf *, u_int32_t); 654extern int ipsp_print_tdb(struct tdb *, char *); 655extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 656#endif /* _KERNEL */ 657#endif /* _NETINET_IPSP_H_ */ 658