ip_ipsp.h revision 1.78
1/* $OpenBSD: ip_ipsp.h,v 1.78 2001/02/28 04:16:57 angelos Exp $ */ 2 3/* 4 * The authors of this code are John Ioannidis (ji@tla.org), 5 * Angelos D. Keromytis (kermit@csd.uch.gr), 6 * Niels Provos (provos@physnet.uni-hamburg.de) and 7 * Niklas Hallqvist (niklas@appli.se). 8 * 9 * The original version of this code was written by John Ioannidis 10 * for BSD/OS in Athens, Greece, in November 1995. 11 * 12 * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 13 * by Angelos D. Keromytis. 14 * 15 * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 16 * and Niels Provos. 17 * 18 * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist. 19 * 20 * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, 21 * Angelos D. Keromytis and Niels Provos. 22 * Copyright (c) 1999 Niklas Hallqvist. 23 * 24 * Permission to use, copy, and modify this software 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/* 44 * IPSP global definitions. 45 */ 46 47#include <sys/types.h> 48#include <sys/queue.h> 49#include <netinet/in.h> 50 51union sockaddr_union 52{ 53 struct sockaddr sa; 54 struct sockaddr_in sin; 55 struct sockaddr_in6 sin6; 56}; 57 58/* HMAC key sizes */ 59#define MD5HMAC96_KEYSIZE 16 60#define SHA1HMAC96_KEYSIZE 20 61#define RIPEMD160HMAC96_KEYSIZE 20 62 63#define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */ 64#define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */ 65#define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */ 66 67/* Authenticator lengths */ 68#define AH_MD5_ALEN 16 69#define AH_SHA1_ALEN 20 70#define AH_RMD160_ALEN 20 71#define AH_ALEN_MAX 20 /* Keep updated */ 72 73/* Reserved SPI numbers */ 74#define SPI_LOCAL_USE 0 75#define SPI_RESERVED_MIN 1 76#define SPI_RESERVED_MAX 255 77 78/* sysctl default values */ 79#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 80#define IPSEC_DEFAULT_PFS 1 81#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 82#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 83#define IPSEC_DEFAULT_SOFT_BYTES 0 84#define IPSEC_DEFAULT_EXP_BYTES 0 85#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 86#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 87#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 88#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 89#define IPSEC_DEFAULT_DEF_ENC "aes" 90#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 91#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 92 93struct sockaddr_encap 94{ 95 u_int8_t sen_len; /* length */ 96 u_int8_t sen_family; /* PF_KEY */ 97 u_int16_t sen_type; /* see SENT_* */ 98 union 99 { 100 struct /* SENT_IP4 */ 101 { 102 u_int8_t Direction; 103 struct in_addr Src; 104 struct in_addr Dst; 105 u_int8_t Proto; 106 u_int16_t Sport; 107 u_int16_t Dport; 108 } Sip4; 109 110 struct /* SENT_IP6 */ 111 { 112 u_int8_t Direction; 113 struct in6_addr Src; 114 struct in6_addr Dst; 115 u_int8_t Proto; 116 u_int16_t Sport; 117 u_int16_t Dport; 118 } Sip6; 119 120 struct ipsec_policy *PolicyHead; /* SENT_IPSP */ 121 } Sen; 122}; 123 124#define IPSP_DIRECTION_IN 0x1 125#define IPSP_DIRECTION_OUT 0x2 126 127#define sen_data Sen.Data 128#define sen_ip_src Sen.Sip4.Src 129#define sen_ip_dst Sen.Sip4.Dst 130#define sen_proto Sen.Sip4.Proto 131#define sen_sport Sen.Sip4.Sport 132#define sen_dport Sen.Sip4.Dport 133#define sen_direction Sen.Sip4.Direction 134#define sen_ip6_src Sen.Sip6.Src 135#define sen_ip6_dst Sen.Sip6.Dst 136#define sen_ip6_proto Sen.Sip6.Proto 137#define sen_ip6_sport Sen.Sip6.Sport 138#define sen_ip6_dport Sen.Sip6.Dport 139#define sen_ip6_direction Sen.Sip6.Direction 140#define sen_ipsp Sen.PolicyHead 141 142/* 143 * The "type" is really part of the address as far as the routing 144 * system is concerned. By using only one bit in the type field 145 * for each type, we sort-of make sure that different types of 146 * encapsulation addresses won't be matched against the wrong type. 147 * 148 */ 149 150#define SENT_IP4 0x0001 /* data is two struct in_addr */ 151#define SENT_IPSP 0x0002 /* data as in IP4/6 plus SPI */ 152#define SENT_IP6 0x0004 153 154#define SENT_LEN sizeof(struct sockaddr_encap) 155 156struct ipsec_acquire 157{ 158 union sockaddr_union ipa_addr; 159 u_int64_t ipa_expire; 160 u_int32_t ipa_seq; 161 struct sockaddr_encap ipa_info; 162 struct sockaddr_encap ipa_mask; 163 struct mbuf *ipa_packet; 164 TAILQ_ENTRY(ipsec_acquire) ipa_next; 165}; 166 167struct ipsec_policy 168{ 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 we use system dflts */ 187 188 struct tdb *ipo_tdb; /* Cached entry */ 189 190 u_int16_t ipo_srcid_len; 191 u_int16_t ipo_dstid_len; 192 u_int16_t ipo_srcid_type; 193 u_int16_t ipo_dstid_type; 194 195 u_int8_t *ipo_srcid; 196 u_int8_t *ipo_dstid; 197 198 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List of policies on TDB */ 199 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policy entries */ 200}; 201 202#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 203 204#define IPSP_IPSEC_USE 0 /* Use if existing, don't bother establishing */ 205#define IPSP_IPSEC_ACQUIRE 1 /* Try to acquire in parallel but let packet */ 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/* 221 * For encapsulation routes are possible not only for the destination 222 * address but also for the protocol, source and destination ports 223 * if available 224 */ 225 226struct route_enc { 227 struct rtentry *re_rt; 228 struct sockaddr_encap re_dst; 229}; 230 231struct tdb /* tunnel descriptor block */ 232{ 233 /* 234 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 235 * one keyed on dst/sproto, and one keyed on src/sproto. The first 236 * is used for finding a specific TDB, the second for finding TDBs 237 * TDBs for outgoing policy matching, and the third for incoming 238 * policy matching. The following three fields maintain the hash 239 * queues in those three tables. 240 */ 241 struct tdb *tdb_hnext; /* dst/spi/sproto table */ 242 struct tdb *tdb_anext; /* dst/sproto table */ 243 struct tdb *tdb_snext; /* src/sproto table */ 244 struct tdb *tdb_inext; 245 struct tdb *tdb_onext; 246 247 struct xformsw *tdb_xform; /* Transformation to use */ 248 struct enc_xform *tdb_encalgxform; /* Encryption algorithm xform */ 249 struct auth_hash *tdb_authalgxform; /* Authentication algorithm xform */ 250 251#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 252#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 253#define TDBF_BYTES 0x00004 /* Check the byte counters */ 254#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 255#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 256#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 257#define TDBF_HALFIV 0x00040 /* Use half-length IV (ESP old only) */ 258#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 259#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 260#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 261#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 262#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 263#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 264#define TDBF_NOREPLAY 0x02000 /* No replay counter present */ 265#define TDBF_RANDOMPADDING 0x04000 /* Random data in the ESP padding */ 266 267 u_int32_t tdb_flags; /* Flags related to this TDB */ 268 269 TAILQ_ENTRY(tdb) tdb_expnext; /* Expiration cluster list link */ 270 TAILQ_ENTRY(tdb) tdb_explink; /* Expiration ordered list link */ 271 272 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 273 u_int32_t tdb_soft_allocations; /* Expiration warning */ 274 u_int32_t tdb_cur_allocations; /* Total number of allocations */ 275 276 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 277 u_int64_t tdb_soft_bytes; /* Expiration warning */ 278 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 279 280 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 281 u_int64_t tdb_soft_timeout; /* Send a soft-expire warning */ 282 u_int64_t tdb_established; /* When was the SPI established */ 283 u_int64_t tdb_timeout; /* Next absolute expiration time. */ 284 285 u_int64_t tdb_first_use; /* When was it first used */ 286 u_int64_t tdb_soft_first_use; /* Soft warning */ 287 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 288 * tdb_exp_first_use <= curtime */ 289 u_int64_t tdb_cryptoid; /* Crypto session ID */ 290 291 u_int32_t tdb_spi; /* SPI */ 292 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 293 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 294 u_int16_t tdb_ivlen; /* IV length */ 295 u_int8_t tdb_sproto; /* IPsec protocol */ 296 u_int8_t tdb_wnd; /* Replay window */ 297 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 298 299 union sockaddr_union tdb_dst; /* Destination address for this SA */ 300 union sockaddr_union tdb_src; /* Source address for this SA */ 301 union sockaddr_union tdb_proxy; 302 303 u_int8_t *tdb_srcid; /* Source ID for this SA */ 304 u_int8_t *tdb_dstid; /* Destination ID for this SA */ 305 u_int8_t *tdb_amxkey; /* Raw authentication key */ 306 u_int8_t *tdb_emxkey; /* Raw encryption key */ 307 308 u_int32_t tdb_rpl; /* Replay counter */ 309 u_int32_t tdb_bitmap; /* Used for replay sliding window */ 310 u_int32_t tdb_initial; /* Initial replay value */ 311 312 u_int32_t tdb_epoch; /* Used by the kernfs interface */ 313 u_int16_t tdb_srcid_len; 314 u_int16_t tdb_dstid_len; 315 u_int16_t tdb_srcid_type; 316 u_int16_t tdb_dstid_type; 317 318 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 319 320 caddr_t tdb_interface; 321 322 TAILQ_HEAD(tdb_inp_head, inpcb) tdb_inp; 323 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; 324}; 325 326struct tdb_ident { 327 u_int32_t spi; 328 union sockaddr_union dst; 329 u_int8_t proto; 330}; 331 332struct tdb_crypto { 333 u_int32_t tc_spi; 334 union sockaddr_union tc_dst; 335 u_int8_t tc_proto; 336 int tc_protoff; 337 int tc_skip; 338 caddr_t tc_ptr; 339}; 340 341struct ipsecinit 342{ 343 u_int8_t *ii_enckey; 344 u_int8_t *ii_authkey; 345 u_int16_t ii_enckeylen; 346 u_int16_t ii_authkeylen; 347 u_int8_t ii_encalg; 348 u_int8_t ii_authalg; 349}; 350 351struct xformsw 352{ 353 u_short xf_type; /* Unique ID of xform */ 354 u_short xf_flags; /* flags (see below) */ 355 char *xf_name; /* human-readable name */ 356 int (*xf_attach)(void); /* called at config time */ 357 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *); 358 int (*xf_zeroize)(struct tdb *); /* termination */ 359 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */ 360 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, int, int); /* output */ 361}; 362 363/* xform IDs */ 364#define XF_IP4 1 /* IP inside IP */ 365#define XF_AH 2 /* AH */ 366#define XF_ESP 3 /* ESP */ 367#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 368 369/* xform attributes */ 370#define XFT_AUTH 0x0001 371#define XFT_CONF 0x0100 372 373#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 374#define IPSEC_KERNFS_BUFSIZE 4096 375 376#if BYTE_ORDER == LITTLE_ENDIAN 377static __inline u_int64_t 378htonq(u_int64_t q) 379{ 380 register u_int32_t u, l; 381 u = q >> 32; 382 l = (u_int32_t) q; 383 384 return htonl(u) | ((u_int64_t)htonl(l) << 32); 385} 386 387#define ntohq(_x) htonq(_x) 388 389#elif BYTE_ORDER == BIG_ENDIAN 390 391#define htonq(_x) (_x) 392#define ntohq(_x) htonq(_x) 393 394#else 395#error "Please fix <machine/endian.h>" 396#endif 397 398#ifdef _KERNEL 399 400/* 401 * Protects all tdb lists. 402 * Must at least be splsoftnet (note: do not use splsoftclock as it is 403 * special on some architectures, assuming it is always an spl lowering 404 * operation). 405 */ 406#define spltdb splsoftnet 407 408extern int encdebug; 409extern int ipsec_acl; 410extern int ipsec_keep_invalid; 411extern int ipsec_in_use; 412extern u_int64_t ipsec_last_added; 413extern int ipsec_require_pfs; 414extern int ipsec_expire_acquire; 415 416extern int ipsec_soft_allocations; 417extern int ipsec_exp_allocations; 418extern int ipsec_soft_bytes; 419extern int ipsec_exp_bytes; 420extern int ipsec_soft_timeout; 421extern int ipsec_exp_timeout; 422extern int ipsec_soft_first_use; 423extern int ipsec_exp_first_use; 424extern char ipsec_def_enc[]; 425extern char ipsec_def_auth[]; 426 427extern struct enc_xform enc_xform_des; 428extern struct enc_xform enc_xform_3des; 429extern struct enc_xform enc_xform_blf; 430extern struct enc_xform enc_xform_cast5; 431extern struct enc_xform enc_xform_skipjack; 432 433extern struct auth_hash auth_hash_hmac_md5_96; 434extern struct auth_hash auth_hash_hmac_sha1_96; 435extern struct auth_hash auth_hash_hmac_ripemd_160_96; 436 437extern TAILQ_HEAD(expclusterlist_head, tdb) expclusterlist; 438extern TAILQ_HEAD(explist_head, tdb) explist; 439extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 440extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head; 441 442extern struct xformsw xformsw[], *xformswNXFORMSW; 443 444/* Check if a given tdb has encryption, authentication and/or tunneling */ 445#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0)| \ 446 ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0)) 447 448/* Traverse spi chain and get attributes */ 449 450#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\ 451 int s = spltdb(); \ 452 struct tdb *tmptdb = (TDBP); \ 453 \ 454 (have) = 0; \ 455 while (tmptdb && tmptdb->tdb_xform) { \ 456 if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \ 457 break; \ 458 (have) |= TDB_ATTRIB(tmptdb); \ 459 tmptdb = tmptdb->TDB_DIR; \ 460 } \ 461 splx(s); \ 462} while (0) 463 464/* Misc. */ 465extern char *inet_ntoa4(struct in_addr); 466extern char *ipsp_address(union sockaddr_union); 467 468/* TDB management routines */ 469extern void tdb_add_inp(struct tdb *tdb, struct inpcb *inp); 470extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *, 471 union sockaddr_union *, u_int8_t, int *); 472extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t); 473extern struct tdb *gettdbbyaddr(union sockaddr_union *, u_int8_t, 474 struct mbuf *, int); 475extern struct tdb *gettdbbysrc(union sockaddr_union *, u_int8_t, 476 struct mbuf *, int); 477extern void puttdb(struct tdb *); 478extern void tdb_delete(struct tdb *, int); 479extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 480extern void tdb_expiration(struct tdb *, int); 481/* Flag values for the last argument of tdb_expiration(). */ 482#define TDBEXP_EARLY 1 /* The tdb is likely to end up early. */ 483#define TDBEXP_TIMEOUT 2 /* Maintain expiration timeout. */ 484extern int tdb_walk(int (*)(struct tdb *, void *, int), void *); 485extern void handle_expirations(void *); 486 487/* XF_IP4 */ 488extern int ipe4_attach(void); 489extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *); 490extern int ipe4_zeroize(struct tdb *); 491extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 492extern void ipe4_input __P((struct mbuf *, ...)); 493extern void ipip_input __P((struct mbuf *, int)); 494 495#ifdef INET 496extern void ip4_input __P((struct mbuf *, ...)); 497#endif /* INET */ 498 499#ifdef INET6 500extern int ip4_input6 __P((struct mbuf **, int *, int)); 501#endif /* INET */ 502 503/* XF_ETHERIP */ 504extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **, 505 int, int); 506extern void etherip_input __P((struct mbuf *, ...)); 507 508/* XF_AH */ 509extern int ah_attach(void); 510extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *); 511extern int ah_zeroize(struct tdb *); 512extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 513extern int ah_output_cb(void *); 514extern int ah_input(struct mbuf *, struct tdb *, int, int); 515extern int ah_input_cb(void *); 516extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 517extern int ah_massage_headers(struct mbuf **, int, int, int, int); 518 519#ifdef INET 520extern void ah4_input __P((struct mbuf *, ...)); 521extern int ah4_input_cb __P((struct mbuf *, ...)); 522#endif /* INET */ 523 524#ifdef INET6 525extern int ah6_input __P((struct mbuf **, int *, int)); 526extern int ah6_input_cb __P((struct mbuf *, int, int)); 527#endif /* INET6 */ 528 529/* XF_ESP */ 530extern int esp_attach(void); 531extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 532extern int esp_zeroize(struct tdb *); 533extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int); 534extern int esp_output_cb(void *); 535extern int esp_input(struct mbuf *, struct tdb *, int, int); 536extern int esp_input_cb(void *); 537extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 538 539#ifdef INET 540extern void esp4_input __P((struct mbuf *, ...)); 541extern int esp4_input_cb __P((struct mbuf *, ...)); 542#endif /* INET */ 543 544#ifdef INET6 545extern int esp6_input __P((struct mbuf **, int *, int)); 546extern int esp6_input_cb __P((struct mbuf *, int, int)); 547#endif /* INET6 */ 548 549/* XF_TCPSIGNATURE */ 550extern int tcp_signature_tdb_attach __P((void)); 551extern int tcp_signature_tdb_init __P((struct tdb *, struct xformsw *, 552 struct ipsecinit *)); 553extern int tcp_signature_tdb_zeroize __P((struct tdb *)); 554extern int tcp_signature_tdb_input __P((struct mbuf *, struct tdb *, int, 555 int)); 556extern int tcp_signature_tdb_output __P((struct mbuf *, struct tdb *, 557 struct mbuf **, int, int)); 558 559/* Padding */ 560extern caddr_t m_pad(struct mbuf *, int); 561 562/* Replay window */ 563extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t, 564 u_int32_t *); 565 566extern unsigned char ipseczeroes[]; 567 568/* Packet processing */ 569extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int); 570extern int ipsp_process_done(struct mbuf *, struct tdb *); 571extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int, 572 struct tdb *, struct inpcb *); 573extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int); 574extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *, 575 union sockaddr_union *, struct sockaddr_encap *, 576 struct mbuf *); 577extern struct ipsec_policy *ipsec_add_policy(struct sockaddr_encap *, 578 struct sockaddr_encap *, 579 union sockaddr_union *, int, int); 580extern int ipsp_match_policy(struct tdb *, struct ipsec_policy *, 581 struct mbuf *, int); 582extern int ipsec_delete_policy(struct ipsec_policy *); 583extern void ipsp_acquire_expirations(void *); 584extern struct ipsec_acquire *ipsp_pending_acquire(union sockaddr_union *); 585extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 586extern void ipsp_delete_acquire(struct ipsec_acquire *); 587extern void ipsp_clear_acquire(struct tdb *); 588#endif /* _KERNEL */ 589#endif /* _NETINET_IPSP_H_ */ 590