ip_ipsp.h revision 1.149
1/* $OpenBSD: ip_ipsp.h,v 1.149 2012/09/18 09:24:45 markus 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#define SHA2_256HMAC96_KEYSIZE 32 61#define SHA2_384HMAC96_KEYSIZE 48 62#define SHA2_512HMAC96_KEYSIZE 64 63 64#define AH_HMAC_MAX_HASHLEN 32 /* 256 bits of authenticator for SHA512 */ 65#define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */ 66#define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */ 67 68/* Authenticator lengths */ 69#define AH_MD5_ALEN 16 70#define AH_SHA1_ALEN 20 71#define AH_RMD160_ALEN 20 72#define AH_SHA2_256_ALEN 32 73#define AH_SHA2_384_ALEN 48 74#define AH_SHA2_512_ALEN 64 75#define AH_ALEN_MAX 64 /* Keep updated */ 76 77/* Reserved SPI numbers */ 78#define SPI_LOCAL_USE 0 79#define SPI_RESERVED_MIN 1 80#define SPI_RESERVED_MAX 255 81 82/* Reserved CPI numbers */ 83#define CPI_RESERVED_MIN 1 84#define CPI_RESERVED_MAX 255 85#define CPI_PRIVATE_MIN 61440 86#define CPI_PRIVATE_MAX 65535 87 88/* sysctl default values */ 89#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 90#define IPSEC_DEFAULT_PFS 1 91#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 92#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 93#define IPSEC_DEFAULT_SOFT_BYTES 0 94#define IPSEC_DEFAULT_EXP_BYTES 0 95#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 96#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 97#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 98#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 99#define IPSEC_DEFAULT_DEF_ENC "aes" 100#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 101#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 102#define IPSEC_DEFAULT_DEF_COMP "deflate" 103 104struct sockaddr_encap { 105 u_int8_t sen_len; /* length */ 106 u_int8_t sen_family; /* PF_KEY */ 107 u_int16_t sen_type; /* see SENT_* */ 108 union { 109 struct { /* SENT_IP4 */ 110 u_int8_t Direction; 111 struct in_addr Src; 112 struct in_addr Dst; 113 u_int8_t Proto; 114 u_int16_t Sport; 115 u_int16_t Dport; 116 } Sip4; 117 118 struct { /* SENT_IP6 */ 119 u_int8_t Direction; 120 struct in6_addr Src; 121 struct in6_addr Dst; 122 u_int8_t Proto; 123 u_int16_t Sport; 124 u_int16_t Dport; 125 } Sip6; 126 127 struct ipsec_policy *PolicyHead; /* SENT_IPSP */ 128 } Sen; 129}; 130 131#define IPSP_DIRECTION_IN 0x1 132#define IPSP_DIRECTION_OUT 0x2 133 134#define sen_data Sen.Data 135#define sen_ip_src Sen.Sip4.Src 136#define sen_ip_dst Sen.Sip4.Dst 137#define sen_proto Sen.Sip4.Proto 138#define sen_sport Sen.Sip4.Sport 139#define sen_dport Sen.Sip4.Dport 140#define sen_direction Sen.Sip4.Direction 141#define sen_ip6_src Sen.Sip6.Src 142#define sen_ip6_dst Sen.Sip6.Dst 143#define sen_ip6_proto Sen.Sip6.Proto 144#define sen_ip6_sport Sen.Sip6.Sport 145#define sen_ip6_dport Sen.Sip6.Dport 146#define sen_ip6_direction Sen.Sip6.Direction 147#define sen_ipsp Sen.PolicyHead 148 149/* 150 * The "type" is really part of the address as far as the routing 151 * system is concerned. By using only one bit in the type field 152 * for each type, we sort-of make sure that different types of 153 * encapsulation addresses won't be matched against the wrong type. 154 * 155 */ 156 157#define SENT_IP4 0x0001 /* data is two struct in_addr */ 158#define SENT_IPSP 0x0002 /* data as in IP4/6 plus SPI */ 159#define SENT_IP6 0x0004 160 161#define SENT_LEN sizeof(struct sockaddr_encap) 162 163struct ipsec_ref { 164 u_int16_t ref_type; /* Subtype of data */ 165 int16_t ref_len; /* Length of data following */ 166 int ref_count; /* Reference count */ 167 int ref_malloctype; /* malloc(9) type, for freeing */ 168}; 169 170struct ipsec_acquire { 171 union sockaddr_union ipa_addr; 172 u_int32_t ipa_seq; 173 struct sockaddr_encap ipa_info; 174 struct sockaddr_encap ipa_mask; 175 struct timeout ipa_timeout; 176 struct ipsec_policy *ipa_policy; 177 struct inpcb *ipa_pcb; 178 TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next; 179 TAILQ_ENTRY(ipsec_acquire) ipa_next; 180 TAILQ_ENTRY(ipsec_acquire) ipa_inp_next; 181}; 182 183struct ipsec_policy { 184 struct sockaddr_encap ipo_addr; 185 struct sockaddr_encap ipo_mask; 186 187 union sockaddr_union ipo_src; /* Local address to use */ 188 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed: 189 * - on output, we try to 190 * contact the remote host 191 * directly (if needed). 192 * - on input, we accept on if 193 * the inner source is the 194 * same as the outer source 195 * address, or if transport 196 * mode was used. 197 */ 198 199 u_int64_t ipo_last_searched; /* Timestamp of last lookup */ 200 201 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */ 202 u_int8_t ipo_type; /* USE/ACQUIRE/... */ 203 u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */ 204 u_int ipo_rdomain; 205 206 int ipo_ref_count; 207 208 struct tdb *ipo_tdb; /* Cached entry */ 209 210 struct ipsec_ref *ipo_srcid; 211 struct ipsec_ref *ipo_dstid; 212 struct ipsec_ref *ipo_local_cred; 213 struct ipsec_ref *ipo_local_auth; 214 215 TAILQ_HEAD(ipo_acquires_head, ipsec_acquire) ipo_acquires; /* List of acquires */ 216 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List TDB policies */ 217 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */ 218}; 219 220#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 221#define IPSP_POLICY_SOCKET 0x0001 /* Socket-attached policy */ 222#define IPSP_POLICY_STATIC 0x0002 /* Static policy */ 223 224#define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */ 225#define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */ 226#define IPSP_IPSEC_REQUIRE 2 /* Require SA */ 227#define IPSP_PERMIT 3 /* Permit traffic through */ 228#define IPSP_DENY 4 /* Deny traffic */ 229#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */ 230 231/* Notification types */ 232#define NOTIFY_SOFT_EXPIRE 0 /* Soft expiration of SA */ 233#define NOTIFY_HARD_EXPIRE 1 /* Hard expiration of SA */ 234#define NOTIFY_REQUEST_SA 2 /* Establish an SA */ 235 236#define NOTIFY_SATYPE_CONF 1 /* SA should do encryption */ 237#define NOTIFY_SATYPE_AUTH 2 /* SA should do authentication */ 238#define NOTIFY_SATYPE_TUNNEL 4 /* SA should use tunneling */ 239#define NOTIFY_SATYPE_COMP 5 /* SA (IPCA) should use compression */ 240 241/* Authentication types */ 242#define IPSP_AUTH_NONE 0 243#define IPSP_AUTH_PASSPHRASE 1 244#define IPSP_AUTH_RSA 2 245 246/* Credential types */ 247#define IPSP_CRED_NONE 0 248#define IPSP_CRED_KEYNOTE 1 249#define IPSP_CRED_X509 2 250 251/* Identity types */ 252#define IPSP_IDENTITY_NONE 0 253#define IPSP_IDENTITY_PREFIX 1 254#define IPSP_IDENTITY_FQDN 2 255#define IPSP_IDENTITY_USERFQDN 3 256#define IPSP_IDENTITY_CONNECTION 4 257 258/* 259 * For encapsulation routes are possible not only for the destination 260 * address but also for the protocol, source and destination ports 261 * if available 262 */ 263 264struct route_enc { 265 struct rtentry *re_rt; 266 u_long re_tableid; /* u_long because of alignment */ 267 struct sockaddr_encap re_dst; 268}; 269 270struct tdb { /* tunnel descriptor block */ 271 /* 272 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 273 * one keyed on dst/sproto, and one keyed on src/sproto. The first 274 * is used for finding a specific TDB, the second for finding TDBs 275 * for outgoing policy matching, and the third for incoming 276 * policy matching. The following three fields maintain the hash 277 * queues in those three tables. 278 */ 279 struct tdb *tdb_hnext; /* dst/spi/sproto table */ 280 struct tdb *tdb_anext; /* dst/sproto table */ 281 struct tdb *tdb_snext; /* src/sproto table */ 282 struct tdb *tdb_inext; 283 struct tdb *tdb_onext; 284 285 struct xformsw *tdb_xform; /* Transform to use */ 286 struct enc_xform *tdb_encalgxform; /* Enc algorithm */ 287 struct auth_hash *tdb_authalgxform; /* Auth algorithm */ 288 struct comp_algo *tdb_compalgxform; /* Compression algo */ 289 290#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 291#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 292#define TDBF_BYTES 0x00004 /* Check the byte counters */ 293#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 294#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 295#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 296#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 297#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 298#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 299#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 300#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 301#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 302#define TDBF_SKIPCRYPTO 0x08000 /* Skip actual crypto processing */ 303#define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */ 304#define TDBF_UDPENCAP 0x20000 /* UDP encapsulation */ 305#define TDBF_PFSYNC 0x40000 /* TDB will be synced */ 306#define TDBF_PFSYNC_RPL 0x80000 /* Replay counter should be bumped */ 307#define TDBF_ESN 0x100000 /* 64-bit sequence numbers (ESN) */ 308 309 u_int32_t tdb_flags; /* Flags related to this TDB */ 310 311 struct timeout tdb_timer_tmo; 312 struct timeout tdb_first_tmo; 313 struct timeout tdb_stimer_tmo; 314 struct timeout tdb_sfirst_tmo; 315 316 u_int32_t tdb_seq; /* Tracking number for PFKEY */ 317 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 318 u_int32_t tdb_soft_allocations; /* Expiration warning */ 319 u_int32_t tdb_cur_allocations; /* Total number of allocs */ 320 321 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 322 u_int64_t tdb_soft_bytes; /* Expiration warning */ 323 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 324 325 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 326 u_int64_t tdb_soft_timeout; /* Send soft-expire warning */ 327 u_int64_t tdb_established; /* When was SPI established */ 328 329 u_int64_t tdb_first_use; /* When was it first used */ 330 u_int64_t tdb_soft_first_use; /* Soft warning */ 331 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 332 * tdb_exp_first_use <= curtime 333 */ 334 335 u_int64_t tdb_last_used; /* When was this SA last used */ 336 u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */ 337 338 u_int64_t tdb_cryptoid; /* Crypto session ID */ 339 340 u_int32_t tdb_spi; /* SPI */ 341 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 342 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 343 u_int16_t tdb_ivlen; /* IV length */ 344 u_int8_t tdb_sproto; /* IPsec protocol */ 345 u_int8_t tdb_wnd; /* Replay window */ 346 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 347 u_int8_t tdb_updates; /* pfsync update counter */ 348 349 union sockaddr_union tdb_dst; /* Destination address */ 350 union sockaddr_union tdb_src; /* Source address */ 351 union sockaddr_union tdb_proxy; 352 353 u_int8_t *tdb_amxkey; /* Raw authentication key */ 354 u_int8_t *tdb_emxkey; /* Raw encryption key */ 355 356 u_int64_t tdb_rpl; /* Replay counter */ 357 u_int64_t tdb_bitmap; /* Used for replay sliding window */ 358 359 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 360 361 struct ipsec_ref *tdb_local_cred; 362 struct ipsec_ref *tdb_remote_cred; 363 struct ipsec_ref *tdb_srcid; /* Source ID for this SA */ 364 struct ipsec_ref *tdb_dstid; /* Destination ID for this SA */ 365 struct ipsec_ref *tdb_local_auth;/* Local authentication material */ 366 struct ipsec_ref *tdb_remote_auth;/* Remote authentication material */ 367 368 u_int32_t tdb_mtu; /* MTU at this point in the chain */ 369 u_int64_t tdb_mtutimeout; /* When to ignore this entry */ 370 371 u_int16_t tdb_udpencap_port; /* Peer UDP port */ 372 373 u_int16_t tdb_tag; /* Packet filter tag */ 374 u_int32_t tdb_tap; /* Alternate enc(4) interface */ 375 376 u_int tdb_rdomain; /* Routing domain */ 377 378 struct sockaddr_encap tdb_filter; /* What traffic is acceptable */ 379 struct sockaddr_encap tdb_filtermask; /* And the mask */ 380 381 TAILQ_HEAD(tdb_inp_head_in, inpcb) tdb_inp_in; 382 TAILQ_HEAD(tdb_inp_head_out, inpcb) tdb_inp_out; 383 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; 384 TAILQ_ENTRY(tdb) tdb_sync_entry; 385}; 386 387struct tdb_ident { 388 u_int32_t spi; 389 union sockaddr_union dst; 390 u_int8_t proto; 391 u_int rdomain; 392}; 393 394struct tdb_crypto { 395 u_int32_t tc_spi; 396 union sockaddr_union tc_dst; 397 u_int8_t tc_proto; 398 int tc_protoff; 399 int tc_skip; 400 caddr_t tc_ptr; 401 u_int tc_rdomain; 402}; 403 404struct ipsecinit { 405 u_int8_t *ii_enckey; 406 u_int8_t *ii_authkey; 407 u_int16_t ii_enckeylen; 408 u_int16_t ii_authkeylen; 409 u_int8_t ii_encalg; 410 u_int8_t ii_authalg; 411 u_int8_t ii_compalg; 412}; 413 414/* xform IDs */ 415#define XF_IP4 1 /* IP inside IP */ 416#define XF_AH 2 /* AH */ 417#define XF_ESP 3 /* ESP */ 418#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 419#define XF_IPCOMP 6 /* IPCOMP */ 420 421/* xform attributes */ 422#define XFT_AUTH 0x0001 423#define XFT_CONF 0x0100 424#define XFT_COMP 0x1000 425 426#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 427 428#ifdef _KERNEL 429 430struct xformsw { 431 u_short xf_type; /* Unique ID of xform */ 432 u_short xf_flags; /* flags (see below) */ 433 char *xf_name; /* human-readable name */ 434 int (*xf_attach)(void); /* called at config time */ 435 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *); 436 int (*xf_zeroize)(struct tdb *); /* termination */ 437 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */ 438 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, 439 int, int); /* output */ 440}; 441 442/* 443 * Protects all tdb lists. 444 * Must at least be splsoftnet (note: do not use splsoftclock as it is 445 * special on some architectures, assuming it is always an spl lowering 446 * operation). 447 */ 448#define spltdb splsoftnet 449 450extern int encdebug; 451extern int ipsec_acl; 452extern int ipsec_keep_invalid; 453extern int ipsec_in_use; 454extern u_int64_t ipsec_last_added; 455extern int ipsec_require_pfs; 456extern int ipsec_expire_acquire; 457 458extern int ipsec_policy_pool_initialized; 459 460extern int ipsec_soft_allocations; 461extern int ipsec_exp_allocations; 462extern int ipsec_soft_bytes; 463extern int ipsec_exp_bytes; 464extern int ipsec_soft_timeout; 465extern int ipsec_exp_timeout; 466extern int ipsec_soft_first_use; 467extern int ipsec_exp_first_use; 468extern char ipsec_def_enc[]; 469extern char ipsec_def_auth[]; 470extern char ipsec_def_comp[]; 471 472extern struct enc_xform enc_xform_des; 473extern struct enc_xform enc_xform_3des; 474extern struct enc_xform enc_xform_blf; 475extern struct enc_xform enc_xform_cast5; 476 477extern struct auth_hash auth_hash_hmac_md5_96; 478extern struct auth_hash auth_hash_hmac_sha1_96; 479extern struct auth_hash auth_hash_hmac_ripemd_160_96; 480 481extern struct comp_algo comp_algo_deflate; 482 483extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 484extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head; 485 486extern struct xformsw xformsw[], *xformswNXFORMSW; 487 488/* Check if a given tdb has encryption, authentication and/or tunneling */ 489#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0) | \ 490 ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0) | \ 491 ((x)->tdb_compalgxform ? NOTIFY_SATYPE_COMP : 0)) 492 493/* Traverse spi chain and get attributes */ 494 495#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) \ 496do { \ 497 int s = spltdb(); \ 498 struct tdb *tmptdb = (TDBP); \ 499 \ 500 (have) = 0; \ 501 while (tmptdb && tmptdb->tdb_xform) { \ 502 if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \ 503 break; \ 504 (have) |= TDB_ATTRIB(tmptdb); \ 505 tmptdb = tmptdb->TDB_DIR; \ 506 } \ 507 splx(s); \ 508} while (/* CONSTCOND */ 0) 509 510/* Misc. */ 511extern char *inet_ntoa4(struct in_addr); 512extern char *ipsp_address(union sockaddr_union); 513 514/* TDB management routines */ 515extern void tdb_add_inp(struct tdb *, struct inpcb *, int); 516extern u_int32_t reserve_spi(u_int, u_int32_t, u_int32_t, 517 union sockaddr_union *, union sockaddr_union *, u_int8_t, int *); 518extern struct tdb *gettdb(u_int, u_int32_t, union sockaddr_union *, u_int8_t); 519extern struct tdb *gettdbbyaddr(u_int, union sockaddr_union *, u_int8_t, 520 struct ipsec_ref *, struct ipsec_ref *, struct ipsec_ref *, 521 struct mbuf *, int, struct sockaddr_encap *, struct sockaddr_encap *); 522extern struct tdb *gettdbbysrc(u_int, union sockaddr_union *, u_int8_t, 523 struct ipsec_ref *, struct ipsec_ref *, struct mbuf *, int, 524 struct sockaddr_encap *, struct sockaddr_encap *); 525extern struct tdb *gettdbbysrcdst(u_int, u_int32_t, union sockaddr_union *, 526 union sockaddr_union *, u_int8_t); 527extern void puttdb(struct tdb *); 528extern void tdb_delete(struct tdb *); 529extern struct tdb *tdb_alloc(u_int); 530extern void tdb_free(struct tdb *); 531extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 532extern int tdb_walk(u_int, int (*)(struct tdb *, void *, int), void *); 533 534/* XF_IP4 */ 535extern int ipe4_attach(void); 536extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *); 537extern int ipe4_zeroize(struct tdb *); 538extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 539extern void ipe4_input(struct mbuf *, ...); 540extern void ipip_input(struct mbuf *, int, struct ifnet *, int); 541 542#ifdef INET 543extern void ip4_input(struct mbuf *, ...); 544#endif /* INET */ 545 546#ifdef INET6 547extern int ip4_input6(struct mbuf **, int *, int); 548#endif /* INET */ 549 550/* XF_AH */ 551extern int ah_attach(void); 552extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *); 553extern int ah_zeroize(struct tdb *); 554extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 555extern int ah_output_cb(void *); 556extern int ah_input(struct mbuf *, struct tdb *, int, int); 557extern int ah_input_cb(void *); 558extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 559extern int ah_massage_headers(struct mbuf **, int, int, int, int); 560 561#ifdef INET 562extern void ah4_input(struct mbuf *, ...); 563extern int ah4_input_cb(struct mbuf *, ...); 564extern void *ah4_ctlinput(int, struct sockaddr *, u_int, void *); 565extern void *udpencap_ctlinput(int, struct sockaddr *, u_int, void *); 566#endif /* INET */ 567 568#ifdef INET6 569extern int ah6_input(struct mbuf **, int *, int); 570extern int ah6_input_cb(struct mbuf *, int, int); 571#endif /* INET6 */ 572 573/* XF_ESP */ 574extern int esp_attach(void); 575extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 576extern int esp_zeroize(struct tdb *); 577extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 578extern int esp_output_cb(void *); 579extern int esp_input(struct mbuf *, struct tdb *, int, int); 580extern int esp_input_cb(void *); 581extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 582 583#ifdef INET 584extern void esp4_input(struct mbuf *, ...); 585extern int esp4_input_cb(struct mbuf *, ...); 586extern void *esp4_ctlinput(int, struct sockaddr *, u_int, void *); 587#endif /* INET */ 588 589#ifdef INET6 590extern int esp6_input(struct mbuf **, int *, int); 591extern int esp6_input_cb(struct mbuf *, int, int); 592#endif /* INET6 */ 593 594/* XF_IPCOMP */ 595extern int ipcomp_attach(void); 596extern int ipcomp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 597extern int ipcomp_zeroize(struct tdb *); 598extern int ipcomp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 599extern int ipcomp_output_cb(void *); 600extern int ipcomp_input(struct mbuf *, struct tdb *, int, int); 601extern int ipcomp_input_cb(void *); 602extern int ipcomp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 603 604#ifdef INET 605extern void ipcomp4_input(struct mbuf *, ...); 606extern int ipcomp4_input_cb(struct mbuf *, ...); 607#endif /* INET */ 608 609#ifdef INET6 610extern int ipcomp6_input(struct mbuf **, int *, int); 611extern int ipcomp6_input_cb(struct mbuf *, int, int); 612#endif /* INET6 */ 613 614/* XF_TCPSIGNATURE */ 615extern int tcp_signature_tdb_attach(void); 616extern int tcp_signature_tdb_init(struct tdb *, struct xformsw *, 617 struct ipsecinit *); 618extern int tcp_signature_tdb_zeroize(struct tdb *); 619extern int tcp_signature_tdb_input(struct mbuf *, struct tdb *, int, 620 int); 621extern int tcp_signature_tdb_output(struct mbuf *, struct tdb *, 622 struct mbuf **, int, int); 623 624/* Replay window */ 625extern int checkreplaywindow(u_int32_t, u_int64_t *, u_int32_t, u_int64_t *, 626 u_int32_t *, int, int); 627 628extern unsigned char ipseczeroes[]; 629 630/* Packet processing */ 631extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int); 632extern int ipsp_process_done(struct mbuf *, struct tdb *); 633extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int, 634 struct tdb *, struct inpcb *, u_int32_t); 635extern struct tdb *ipsp_spd_inp(struct mbuf *, int, int, int *, int, 636 struct tdb *, struct inpcb *, struct ipsec_policy *); 637extern int ipsec_common_input(struct mbuf *, int, int, int, int, int); 638extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int, 639 struct m_tag *); 640extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *, 641 union sockaddr_union *, struct sockaddr_encap *, struct mbuf *); 642extern struct ipsec_policy *ipsec_add_policy(struct inpcb *, int, int); 643extern void ipsec_update_policy(struct inpcb *, struct ipsec_policy *, 644 int, int); 645extern int ipsec_delete_policy(struct ipsec_policy *); 646extern struct ipsec_acquire *ipsp_pending_acquire(struct ipsec_policy *, 647 union sockaddr_union *); 648extern void ipsp_delete_acquire(void *); 649extern int ipsp_is_unspecified(union sockaddr_union); 650extern void ipsp_reffree(struct ipsec_ref *); 651extern void ipsp_skipcrypto_unmark(struct tdb_ident *); 652extern void ipsp_skipcrypto_mark(struct tdb_ident *); 653extern struct m_tag *ipsp_parse_headers(struct mbuf *, int, u_int8_t); 654extern int ipsp_ref_match(struct ipsec_ref *, struct ipsec_ref *); 655extern ssize_t ipsec_hdrsz(struct tdb *); 656extern void ipsec_adjust_mtu(struct mbuf *, u_int32_t); 657extern int ipsp_print_tdb(struct tdb *, char *, size_t); 658extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 659extern int ipsp_aux_match(struct tdb *, 660 struct ipsec_ref *, struct ipsec_ref *, 661 struct ipsec_ref *, struct ipsec_ref *, 662 struct sockaddr_encap *, struct sockaddr_encap *); 663#endif /* _KERNEL */ 664#endif /* _NETINET_IPSP_H_ */ 665