ip_ipsp.h revision 1.178
1/* $OpenBSD: ip_ipsp.h,v 1.178 2017/02/07 22:28:37 bluhm 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 43struct m_tag; 44 45/* IPSP global definitions. */ 46 47#include <sys/types.h> 48#ifdef _KERNEL 49#include <sys/timeout.h> 50#include <sys/tree.h> 51#endif 52#include <sys/queue.h> 53#include <netinet/in.h> 54#include <net/radix.h> 55 56union sockaddr_union { 57 struct sockaddr sa; 58 struct sockaddr_in sin; 59 struct sockaddr_in6 sin6; 60}; 61 62#define AH_HMAC_MAX_HASHLEN 32 /* 256 bits of authenticator for SHA512 */ 63#define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */ 64#define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */ 65 66/* Authenticator lengths */ 67#define AH_MD5_ALEN 16 68#define AH_SHA1_ALEN 20 69#define AH_RMD160_ALEN 20 70#define AH_SHA2_256_ALEN 32 71#define AH_SHA2_384_ALEN 48 72#define AH_SHA2_512_ALEN 64 73#define AH_ALEN_MAX 64 /* Keep updated */ 74 75/* Reserved SPI numbers */ 76#define SPI_LOCAL_USE 0 77#define SPI_RESERVED_MIN 1 78#define SPI_RESERVED_MAX 255 79 80/* Reserved CPI numbers */ 81#define CPI_RESERVED_MIN 1 82#define CPI_RESERVED_MAX 255 83#define CPI_PRIVATE_MIN 61440 84#define CPI_PRIVATE_MAX 65535 85 86/* sysctl default values */ 87#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 88#define IPSEC_DEFAULT_PFS 1 89#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 90#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 91#define IPSEC_DEFAULT_SOFT_BYTES 0 92#define IPSEC_DEFAULT_EXP_BYTES 0 93#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 94#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 95#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 96#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 97#define IPSEC_DEFAULT_DEF_ENC "aes" 98#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 99#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 100#define IPSEC_DEFAULT_DEF_COMP "deflate" 101 102struct sockaddr_encap { 103 u_int8_t sen_len; /* length */ 104 u_int8_t sen_family; /* PF_KEY */ 105 u_int16_t sen_type; /* see SENT_* */ 106 union { 107 struct { /* SENT_IP4 */ 108 u_int8_t Direction; 109 struct in_addr Src; 110 struct in_addr Dst; 111 u_int8_t Proto; 112 u_int16_t Sport; 113 u_int16_t Dport; 114 } Sip4; 115 116 struct { /* SENT_IP6 */ 117 u_int8_t Direction; 118 struct in6_addr Src; 119 struct in6_addr Dst; 120 u_int8_t Proto; 121 u_int16_t Sport; 122 u_int16_t Dport; 123 } Sip6; 124 125 struct ipsec_policy *PolicyHead; /* SENT_IPSP */ 126 } Sen; 127}; 128 129#define IPSP_DIRECTION_IN 0x1 130#define IPSP_DIRECTION_OUT 0x2 131 132#ifdef _KERNEL 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_id { 164 u_int16_t type; /* Subtype of data */ 165 int16_t len; /* Length of data following */ 166}; 167 168struct ipsec_ids { 169 RBT_ENTRY(ipsec_ids) id_node_id; 170 RBT_ENTRY(ipsec_ids) id_node_flow; 171 struct ipsec_id *id_local; 172 struct ipsec_id *id_remote; 173 u_int32_t id_flow; 174 int id_refcount; 175 struct timeout id_timeout; 176}; 177RBT_HEAD(ipsec_ids_flows, ipsec_ids); 178RBT_HEAD(ipsec_ids_tree, ipsec_ids); 179 180struct ipsec_acquire { 181 union sockaddr_union ipa_addr; 182 u_int32_t ipa_seq; 183 struct sockaddr_encap ipa_info; 184 struct sockaddr_encap ipa_mask; 185 struct timeout ipa_timeout; 186 struct ipsec_policy *ipa_policy; 187 struct inpcb *ipa_pcb; 188 TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next; 189 TAILQ_ENTRY(ipsec_acquire) ipa_next; 190}; 191 192struct ipsec_policy { 193 struct radix_node ipo_nodes[2]; /* radix tree glue */ 194 struct sockaddr_encap ipo_addr; 195 struct sockaddr_encap ipo_mask; 196 197 union sockaddr_union ipo_src; /* Local address to use */ 198 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed: 199 * - on output, we try to 200 * contact the remote host 201 * directly (if needed). 202 * - on input, we accept on if 203 * the inner source is the 204 * same as the outer source 205 * address, or if transport 206 * mode was used. 207 */ 208 209 u_int64_t ipo_last_searched; /* Timestamp of last lookup */ 210 211 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */ 212 u_int8_t ipo_type; /* USE/ACQUIRE/... */ 213 u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */ 214 u_int ipo_rdomain; 215 216 int ipo_ref_count; 217 218 struct tdb *ipo_tdb; /* Cached entry */ 219 220 struct ipsec_ids *ipo_ids; 221 222 TAILQ_HEAD(ipo_acquires_head, ipsec_acquire) ipo_acquires; /* List of acquires */ 223 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List TDB policies */ 224 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */ 225}; 226 227#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 228#define IPSP_POLICY_STATIC 0x0002 /* Static policy */ 229 230#define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */ 231#define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */ 232#define IPSP_IPSEC_REQUIRE 2 /* Require SA */ 233#define IPSP_PERMIT 3 /* Permit traffic through */ 234#define IPSP_DENY 4 /* Deny traffic */ 235#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */ 236 237/* Identity types */ 238#define IPSP_IDENTITY_NONE 0 239#define IPSP_IDENTITY_PREFIX 1 240#define IPSP_IDENTITY_FQDN 2 241#define IPSP_IDENTITY_USERFQDN 3 242 243struct tdb { /* tunnel descriptor block */ 244 /* 245 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 246 * one keyed on dst/sproto, and one keyed on src/sproto. The first 247 * is used for finding a specific TDB, the second for finding TDBs 248 * for outgoing policy matching, and the third for incoming 249 * policy matching. The following three fields maintain the hash 250 * queues in those three tables. 251 */ 252 struct tdb *tdb_hnext; /* dst/spi/sproto table */ 253 struct tdb *tdb_dnext; /* dst/sproto table */ 254 struct tdb *tdb_snext; /* src/sproto table */ 255 struct tdb *tdb_inext; 256 struct tdb *tdb_onext; 257 258 struct xformsw *tdb_xform; /* Transform to use */ 259 struct enc_xform *tdb_encalgxform; /* Enc algorithm */ 260 struct auth_hash *tdb_authalgxform; /* Auth algorithm */ 261 struct comp_algo *tdb_compalgxform; /* Compression algo */ 262 263#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 264#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 265#define TDBF_BYTES 0x00004 /* Check the byte counters */ 266#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 267#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 268#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 269#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 270#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 271#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 272#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 273#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 274#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 275#define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */ 276#define TDBF_UDPENCAP 0x20000 /* UDP encapsulation */ 277#define TDBF_PFSYNC 0x40000 /* TDB will be synced */ 278#define TDBF_PFSYNC_RPL 0x80000 /* Replay counter should be bumped */ 279#define TDBF_ESN 0x100000 /* 64-bit sequence numbers (ESN) */ 280 281 u_int32_t tdb_flags; /* Flags related to this TDB */ 282 283 struct timeout tdb_timer_tmo; 284 struct timeout tdb_first_tmo; 285 struct timeout tdb_stimer_tmo; 286 struct timeout tdb_sfirst_tmo; 287 288 u_int32_t tdb_seq; /* Tracking number for PFKEY */ 289 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 290 u_int32_t tdb_soft_allocations; /* Expiration warning */ 291 u_int32_t tdb_cur_allocations; /* Total number of allocs */ 292 293 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 294 u_int64_t tdb_soft_bytes; /* Expiration warning */ 295 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 296 297 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 298 u_int64_t tdb_soft_timeout; /* Send soft-expire warning */ 299 u_int64_t tdb_established; /* When was SPI established */ 300 301 u_int64_t tdb_first_use; /* When was it first used */ 302 u_int64_t tdb_soft_first_use; /* Soft warning */ 303 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 304 * tdb_exp_first_use <= curtime 305 */ 306 307 u_int64_t tdb_last_used; /* When was this SA last used */ 308 u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */ 309 310 u_int64_t tdb_cryptoid; /* Crypto session ID */ 311 312 u_int32_t tdb_spi; /* SPI */ 313 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 314 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 315 u_int16_t tdb_ivlen; /* IV length */ 316 u_int8_t tdb_sproto; /* IPsec protocol */ 317 u_int8_t tdb_wnd; /* Replay window */ 318 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 319 u_int8_t tdb_updates; /* pfsync update counter */ 320 321 union sockaddr_union tdb_dst; /* Destination address */ 322 union sockaddr_union tdb_src; /* Source address */ 323 324 u_int8_t *tdb_amxkey; /* Raw authentication key */ 325 u_int8_t *tdb_emxkey; /* Raw encryption key */ 326 327#define TDB_REPLAYWASTE 32 328#define TDB_REPLAYMAX (2100+TDB_REPLAYWASTE) 329 330 u_int64_t tdb_rpl; /* Replay counter */ 331 u_int32_t tdb_seen[howmany(TDB_REPLAYMAX, 32)]; /* Anti-replay window */ 332 333 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 334 335 struct ipsec_ids *tdb_ids; /* Src/Dst ID for this SA */ 336 int tdb_ids_swapped; /* XXX */ 337 338 u_int32_t tdb_mtu; /* MTU at this point in the chain */ 339 u_int64_t tdb_mtutimeout; /* When to ignore this entry */ 340 341 u_int16_t tdb_udpencap_port; /* Peer UDP port */ 342 343 u_int16_t tdb_tag; /* Packet filter tag */ 344 u_int32_t tdb_tap; /* Alternate enc(4) interface */ 345 346 u_int tdb_rdomain; /* Routing domain */ 347 348 struct sockaddr_encap tdb_filter; /* What traffic is acceptable */ 349 struct sockaddr_encap tdb_filtermask; /* And the mask */ 350 351 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; 352 TAILQ_ENTRY(tdb) tdb_sync_entry; 353}; 354 355#endif /* _KERNEL */ 356 357struct tdb_ident { 358 u_int32_t spi; 359 union sockaddr_union dst; 360 u_int8_t proto; 361 u_int rdomain; 362}; 363 364struct tdb_crypto { 365 u_int32_t tc_spi; 366 union sockaddr_union tc_dst; 367 u_int8_t tc_proto; 368 int tc_protoff; 369 int tc_skip; 370 u_int tc_rdomain; 371}; 372 373struct ipsecinit { 374 u_int8_t *ii_enckey; 375 u_int8_t *ii_authkey; 376 u_int16_t ii_enckeylen; 377 u_int16_t ii_authkeylen; 378 u_int8_t ii_encalg; 379 u_int8_t ii_authalg; 380 u_int8_t ii_compalg; 381}; 382 383/* xform IDs */ 384#define XF_IP4 1 /* IP inside IP */ 385#define XF_AH 2 /* AH */ 386#define XF_ESP 3 /* ESP */ 387#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 388#define XF_IPCOMP 6 /* IPCOMP */ 389 390/* xform attributes */ 391#define XFT_AUTH 0x0001 392#define XFT_CONF 0x0100 393#define XFT_COMP 0x1000 394 395#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 396 397#ifdef _KERNEL 398 399struct xformsw { 400 u_short xf_type; /* Unique ID of xform */ 401 u_short xf_flags; /* flags (see below) */ 402 char *xf_name; /* human-readable name */ 403 int (*xf_attach)(void); /* called at config time */ 404 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *); 405 int (*xf_zeroize)(struct tdb *); /* termination */ 406 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */ 407 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, 408 int, int); /* output */ 409}; 410 411extern int ipsec_in_use; 412extern u_int64_t ipsec_last_added; 413extern int ipsec_policy_pool_initialized; 414 415extern int ipsec_keep_invalid; /* lifetime of embryonic SAs (in sec) */ 416extern int ipsec_require_pfs; /* use Perfect Forward Secrecy */ 417extern int ipsec_expire_acquire; /* wait for security assoc. (in sec) */ 418extern int ipsec_soft_allocations; /* flows/SA before renegotiation */ 419extern int ipsec_exp_allocations; /* num. of flows/SA before it expires */ 420extern int ipsec_soft_bytes; /* bytes/SA before renegotiation */ 421extern int ipsec_exp_bytes; /* num of bytes/SA before it expires */ 422extern int ipsec_soft_timeout; /* seconds/SA before renegotiation */ 423extern int ipsec_exp_timeout; /* seconds/SA before it expires */ 424extern int ipsec_soft_first_use; /* seconds between 1st asso & renego */ 425extern int ipsec_exp_first_use; /* seconds between 1st asso & expire */ 426 427extern char ipsec_def_enc[]; 428extern char ipsec_def_auth[]; 429extern char ipsec_def_comp[]; 430 431extern struct enc_xform enc_xform_des; 432extern struct enc_xform enc_xform_3des; 433extern struct enc_xform enc_xform_blf; 434extern struct enc_xform enc_xform_cast5; 435 436extern struct auth_hash auth_hash_hmac_md5_96; 437extern struct auth_hash auth_hash_hmac_sha1_96; 438extern struct auth_hash auth_hash_hmac_ripemd_160_96; 439 440extern struct comp_algo comp_algo_deflate; 441 442extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 443extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head; 444 445/* Misc. */ 446#ifdef ENCDEBUG 447const char *ipsp_address(union sockaddr_union *, char *, socklen_t); 448#endif /* ENCDEBUG */ 449 450/* SPD tables */ 451struct radix_node_head *spd_table_add(unsigned int); 452struct radix_node_head *spd_table_get(unsigned int); 453 454/* TDB management routines */ 455uint32_t reserve_spi(u_int, u_int32_t, u_int32_t, union sockaddr_union *, 456 union sockaddr_union *, u_int8_t, int *); 457struct tdb *gettdb(u_int, u_int32_t, union sockaddr_union *, u_int8_t); 458struct tdb *gettdbbydst(u_int, union sockaddr_union *, u_int8_t, 459 struct ipsec_ids *, 460 struct sockaddr_encap *, struct sockaddr_encap *); 461struct tdb *gettdbbysrc(u_int, union sockaddr_union *, u_int8_t, 462 struct ipsec_ids *, 463 struct sockaddr_encap *, struct sockaddr_encap *); 464struct tdb *gettdbbysrcdst(u_int, u_int32_t, union sockaddr_union *, 465 union sockaddr_union *, u_int8_t); 466void puttdb(struct tdb *); 467void tdb_delete(struct tdb *); 468struct tdb *tdb_alloc(u_int); 469void tdb_free(struct tdb *); 470int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 471int tdb_walk(u_int, int (*)(struct tdb *, void *, int), void *); 472 473/* XF_IP4 */ 474int ipe4_attach(void); 475int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *); 476int ipe4_zeroize(struct tdb *); 477void ipe4_input(struct mbuf *, int, int); 478int ipip_input(struct mbuf **, int *, struct ifnet *, int); 479int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 480 481int ip4_input(struct mbuf **, int *, int); 482 483/* XF_AH */ 484int ah_attach(void); 485int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *); 486int ah_zeroize(struct tdb *); 487int ah_input(struct mbuf *, struct tdb *, int, int); 488int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 489int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 490 491int ah4_input(struct mbuf **, int *, int); 492void ah4_ctlinput(int, struct sockaddr *, u_int, void *); 493void udpencap_ctlinput(int, struct sockaddr *, u_int, void *); 494 495#ifdef INET6 496int ah6_input(struct mbuf **, int *, int); 497#endif /* INET6 */ 498 499/* XF_ESP */ 500int esp_attach(void); 501int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 502int esp_zeroize(struct tdb *); 503int esp_input(struct mbuf *, struct tdb *, int, int); 504int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 505int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 506 507int esp4_input(struct mbuf **, int *, int); 508void esp4_ctlinput(int, struct sockaddr *, u_int, void *); 509 510#ifdef INET6 511int esp6_input(struct mbuf **, int *, int); 512#endif /* INET6 */ 513 514/* XF_IPCOMP */ 515int ipcomp_attach(void); 516int ipcomp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 517int ipcomp_zeroize(struct tdb *); 518int ipcomp_input(struct mbuf *, struct tdb *, int, int); 519int ipcomp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 520int ipcomp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 521int ipcomp4_input(struct mbuf **, int *, int); 522#ifdef INET6 523int ipcomp6_input(struct mbuf **, int *, int); 524#endif /* INET6 */ 525 526/* XF_TCPSIGNATURE */ 527int tcp_signature_tdb_attach(void); 528int tcp_signature_tdb_init(struct tdb *, struct xformsw *, 529 struct ipsecinit *); 530int tcp_signature_tdb_zeroize(struct tdb *); 531int tcp_signature_tdb_input(struct mbuf *, struct tdb *, int, int); 532int tcp_signature_tdb_output(struct mbuf *, struct tdb *, struct mbuf **, 533 int, int); 534 535/* Replay window */ 536int checkreplaywindow(struct tdb *, u_int32_t, u_int32_t *, int); 537 538/* Packet processing */ 539int ipsp_process_packet(struct mbuf *, struct tdb *, int, int); 540int ipsp_process_done(struct mbuf *, struct tdb *); 541struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int, 542 struct tdb *, struct inpcb *, u_int32_t); 543struct tdb *ipsp_spd_inp(struct mbuf *, int, int, int *, int, 544 struct tdb *, struct inpcb *, struct ipsec_policy *); 545int ipsp_is_unspecified(union sockaddr_union); 546int ipsp_aux_match(struct tdb *, struct ipsec_ids *, 547 struct sockaddr_encap *, struct sockaddr_encap *); 548int ipsp_ids_match(struct ipsec_ids *, struct ipsec_ids *); 549struct ipsec_ids *ipsp_ids_insert(struct ipsec_ids *); 550struct ipsec_ids *ipsp_ids_lookup(u_int32_t); 551void ipsp_ids_free(struct ipsec_ids *); 552 553int ipsec_common_input(struct mbuf *, int, int, int, int, int); 554void ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int); 555int ipsec_delete_policy(struct ipsec_policy *); 556ssize_t ipsec_hdrsz(struct tdb *); 557void ipsec_adjust_mtu(struct mbuf *, u_int32_t); 558struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 559 560#endif /* _KERNEL */ 561#endif /* _NETINET_IPSP_H_ */ 562