ip_ipsp.h revision 1.86
1/* $OpenBSD: ip_ipsp.h,v 1.86 2001/05/21 03:02:19 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 <sys/timeout.h> 50#include <netinet/in.h> 51 52union sockaddr_union 53{ 54 struct sockaddr sa; 55 struct sockaddr_in sin; 56 struct sockaddr_in6 sin6; 57}; 58 59/* HMAC key sizes */ 60#define MD5HMAC96_KEYSIZE 16 61#define SHA1HMAC96_KEYSIZE 20 62#define RIPEMD160HMAC96_KEYSIZE 20 63 64#define AH_HMAC_HASHLEN 12 /* 96 bits of authenticator */ 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_ALEN_MAX 20 /* Keep updated */ 73 74/* Reserved SPI numbers */ 75#define SPI_LOCAL_USE 0 76#define SPI_RESERVED_MIN 1 77#define SPI_RESERVED_MAX 255 78 79/* sysctl default values */ 80#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 81#define IPSEC_DEFAULT_PFS 1 82#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 83#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 84#define IPSEC_DEFAULT_SOFT_BYTES 0 85#define IPSEC_DEFAULT_EXP_BYTES 0 86#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 87#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 88#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 89#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 90#define IPSEC_DEFAULT_DEF_ENC "aes" 91#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 92#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 93 94struct sockaddr_encap 95{ 96 u_int8_t sen_len; /* length */ 97 u_int8_t sen_family; /* PF_KEY */ 98 u_int16_t sen_type; /* see SENT_* */ 99 union 100 { 101 struct /* SENT_IP4 */ 102 { 103 u_int8_t Direction; 104 struct in_addr Src; 105 struct in_addr Dst; 106 u_int8_t Proto; 107 u_int16_t Sport; 108 u_int16_t Dport; 109 } Sip4; 110 111 struct /* SENT_IP6 */ 112 { 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{ 159 int ref_type; /* Subtype of data */ 160 int ref_len; /* Length of data following */ 161 int ref_count; /* Reference count */ 162 int ref_malloctype; /* malloc(9) type, for free'ing purposes */ 163}; 164 165struct ipsec_acquire 166{ 167 union sockaddr_union ipa_addr; 168 u_int64_t ipa_expire; 169 u_int32_t ipa_seq; 170 struct sockaddr_encap ipa_info; 171 struct sockaddr_encap ipa_mask; 172 struct mbuf *ipa_packet; 173 TAILQ_ENTRY(ipsec_acquire) ipa_next; 174}; 175 176struct ipsec_policy 177{ 178 struct sockaddr_encap ipo_addr; 179 struct sockaddr_encap ipo_mask; 180 181 union sockaddr_union ipo_src; /* Local address to use */ 182 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed: 183 * - on output, we try to contact the 184 * remote host directly (if needed). 185 * - on input, we accept on if the 186 * inner source is the same as the 187 * outer source address, or if transport 188 * mode was used. 189 */ 190 191 u_int64_t ipo_last_searched; /* Timestamp of last lookup */ 192 193 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */ 194 u_int8_t ipo_type; /* USE/ACQUIRE/... */ 195 u_int8_t ipo_sproto;/* ESP, AH; if zero we use system dflts */ 196 197 struct tdb *ipo_tdb; /* Cached entry */ 198 199 struct ipsec_ref *ipo_srcid; 200 struct ipsec_ref *ipo_dstid; 201 struct ipsec_ref *ipo_local_cred; 202 203 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* List of policies on TDB */ 204 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policy entries */ 205}; 206 207#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 208#define IPSP_POLICY_SOCKET 0x0001 /* Socket-attached policy */ 209 210#define IPSP_IPSEC_USE 0 /* Use if existing, don't bother establishing */ 211#define IPSP_IPSEC_ACQUIRE 1 /* Try to acquire in parallel but let packet */ 212#define IPSP_IPSEC_REQUIRE 2 /* Require SA */ 213#define IPSP_PERMIT 3 /* Permit traffic through */ 214#define IPSP_DENY 4 /* Deny traffic */ 215#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */ 216 217/* Notification types */ 218#define NOTIFY_SOFT_EXPIRE 0 /* Soft expiration of SA */ 219#define NOTIFY_HARD_EXPIRE 1 /* Hard expiration of SA */ 220#define NOTIFY_REQUEST_SA 2 /* Establish an SA */ 221 222#define NOTIFY_SATYPE_CONF 1 /* SA should do encryption */ 223#define NOTIFY_SATYPE_AUTH 2 /* SA should do authentication */ 224#define NOTIFY_SATYPE_TUNNEL 4 /* SA should use tunneling */ 225 226/* 227 * For encapsulation routes are possible not only for the destination 228 * address but also for the protocol, source and destination ports 229 * if available 230 */ 231 232struct route_enc { 233 struct rtentry *re_rt; 234 struct sockaddr_encap re_dst; 235}; 236 237struct tdb /* tunnel descriptor block */ 238{ 239 /* 240 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 241 * one keyed on dst/sproto, and one keyed on src/sproto. The first 242 * is used for finding a specific TDB, the second for finding TDBs 243 * TDBs for outgoing policy matching, and the third for incoming 244 * policy matching. The following three fields maintain the hash 245 * queues in those three tables. 246 */ 247 struct tdb *tdb_hnext; /* dst/spi/sproto table */ 248 struct tdb *tdb_anext; /* dst/sproto table */ 249 struct tdb *tdb_snext; /* src/sproto table */ 250 struct tdb *tdb_inext; 251 struct tdb *tdb_onext; 252 253 struct xformsw *tdb_xform; /* Transformation to use */ 254 struct enc_xform *tdb_encalgxform; /* Encryption algorithm xform */ 255 struct auth_hash *tdb_authalgxform; /* Authentication algorithm xform */ 256 257#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 258#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 259#define TDBF_BYTES 0x00004 /* Check the byte counters */ 260#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 261#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 262#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 263#define TDBF_HALFIV 0x00040 /* Use half-length IV (ESP old only) */ 264#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 265#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 266#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 267#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 268#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 269#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 270#define TDBF_NOREPLAY 0x02000 /* No replay counter present */ 271#define TDBF_RANDOMPADDING 0x04000 /* Random data in the ESP padding */ 272 273 u_int32_t tdb_flags; /* Flags related to this TDB */ 274 275 struct timeout tdb_timer_tmo; 276 struct timeout tdb_first_tmo; 277 struct timeout tdb_stimer_tmo; 278 struct timeout tdb_sfirst_tmo; 279 280 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 281 u_int32_t tdb_soft_allocations; /* Expiration warning */ 282 u_int32_t tdb_cur_allocations; /* Total number of allocations */ 283 284 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 285 u_int64_t tdb_soft_bytes; /* Expiration warning */ 286 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 287 288 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 289 u_int64_t tdb_soft_timeout; /* Send a soft-expire warning */ 290 u_int64_t tdb_established; /* When was the SPI established */ 291 292 u_int64_t tdb_first_use; /* When was it first used */ 293 u_int64_t tdb_soft_first_use; /* Soft warning */ 294 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 295 * tdb_exp_first_use <= curtime */ 296 u_int64_t tdb_cryptoid; /* Crypto session ID */ 297 298 u_int32_t tdb_spi; /* SPI */ 299 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 300 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 301 u_int16_t tdb_ivlen; /* IV length */ 302 u_int8_t tdb_sproto; /* IPsec protocol */ 303 u_int8_t tdb_wnd; /* Replay window */ 304 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 305 306 union sockaddr_union tdb_dst; /* Destination address for this SA */ 307 union sockaddr_union tdb_src; /* Source address for this SA */ 308 union sockaddr_union tdb_proxy; 309 310 u_int8_t *tdb_amxkey; /* Raw authentication key */ 311 u_int8_t *tdb_emxkey; /* Raw encryption key */ 312 313 u_int32_t tdb_rpl; /* Replay counter */ 314 u_int32_t tdb_bitmap; /* Used for replay sliding window */ 315 u_int32_t tdb_initial; /* Initial replay value */ 316 317 u_int32_t tdb_epoch; /* Used by the kernfs interface */ 318 319 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 320 321 struct ipsec_ref *tdb_local_cred; 322 struct ipsec_ref *tdb_remote_cred; 323 struct ipsec_ref *tdb_srcid; /* Source ID for this SA */ 324 struct ipsec_ref *tdb_dstid; /* Destination ID for this SA */ 325 326 TAILQ_HEAD(tdb_inp_head_in, inpcb) tdb_inp_in; 327 TAILQ_HEAD(tdb_inp_head_out, inpcb) tdb_inp_out; 328 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; 329}; 330 331struct tdb_ident { 332 u_int32_t spi; 333 union sockaddr_union dst; 334 u_int8_t proto; 335}; 336 337struct tdb_crypto { 338 u_int32_t tc_spi; 339 union sockaddr_union tc_dst; 340 u_int8_t tc_proto; 341 u_int32_t tc_spi2; 342 union sockaddr_union tc_dst2; 343 u_int8_t tc_proto2; 344 int tc_protoff; 345 int tc_skip; 346 caddr_t tc_ptr; 347}; 348 349struct ipsecinit 350{ 351 u_int8_t *ii_enckey; 352 u_int8_t *ii_authkey; 353 u_int16_t ii_enckeylen; 354 u_int16_t ii_authkeylen; 355 u_int8_t ii_encalg; 356 u_int8_t ii_authalg; 357}; 358 359struct xformsw 360{ 361 u_short xf_type; /* Unique ID of xform */ 362 u_short xf_flags; /* flags (see below) */ 363 char *xf_name; /* human-readable name */ 364 int (*xf_attach)(void); /* called at config time */ 365 int (*xf_init)(struct tdb *, struct xformsw *, struct ipsecinit *); 366 int (*xf_zeroize)(struct tdb *); /* termination */ 367 int (*xf_input)(struct mbuf *, struct tdb *, int, int); /* input */ 368 int (*xf_output)(struct mbuf *, struct tdb *, struct mbuf **, int, int, struct tdb *); /* output */ 369}; 370 371/* xform IDs */ 372#define XF_IP4 1 /* IP inside IP */ 373#define XF_AH 2 /* AH */ 374#define XF_ESP 3 /* ESP */ 375#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 376 377/* xform attributes */ 378#define XFT_AUTH 0x0001 379#define XFT_CONF 0x0100 380 381#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 382#define IPSEC_KERNFS_BUFSIZE 4096 383 384#if BYTE_ORDER == LITTLE_ENDIAN 385static __inline u_int64_t 386htonq(u_int64_t q) 387{ 388 register u_int32_t u, l; 389 u = q >> 32; 390 l = (u_int32_t) q; 391 392 return htonl(u) | ((u_int64_t)htonl(l) << 32); 393} 394 395#define ntohq(_x) htonq(_x) 396 397#elif BYTE_ORDER == BIG_ENDIAN 398 399#define htonq(_x) (_x) 400#define ntohq(_x) htonq(_x) 401 402#else 403#error "Please fix <machine/endian.h>" 404#endif 405 406#ifdef _KERNEL 407 408/* 409 * Protects all tdb lists. 410 * Must at least be splsoftnet (note: do not use splsoftclock as it is 411 * special on some architectures, assuming it is always an spl lowering 412 * operation). 413 */ 414#define spltdb splsoftnet 415 416extern int encdebug; 417extern int ipsec_acl; 418extern int ipsec_keep_invalid; 419extern int ipsec_in_use; 420extern u_int64_t ipsec_last_added; 421extern int ipsec_require_pfs; 422extern int ipsec_expire_acquire; 423 424extern int ipsec_soft_allocations; 425extern int ipsec_exp_allocations; 426extern int ipsec_soft_bytes; 427extern int ipsec_exp_bytes; 428extern int ipsec_soft_timeout; 429extern int ipsec_exp_timeout; 430extern int ipsec_soft_first_use; 431extern int ipsec_exp_first_use; 432extern char ipsec_def_enc[]; 433extern char ipsec_def_auth[]; 434 435extern struct enc_xform enc_xform_des; 436extern struct enc_xform enc_xform_3des; 437extern struct enc_xform enc_xform_blf; 438extern struct enc_xform enc_xform_cast5; 439extern struct enc_xform enc_xform_skipjack; 440 441extern struct auth_hash auth_hash_hmac_md5_96; 442extern struct auth_hash auth_hash_hmac_sha1_96; 443extern struct auth_hash auth_hash_hmac_ripemd_160_96; 444 445extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 446extern TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire) ipsec_acquire_head; 447 448extern struct xformsw xformsw[], *xformswNXFORMSW; 449 450/* Check if a given tdb has encryption, authentication and/or tunneling */ 451#define TDB_ATTRIB(x) (((x)->tdb_encalgxform ? NOTIFY_SATYPE_CONF : 0)| \ 452 ((x)->tdb_authalgxform ? NOTIFY_SATYPE_AUTH : 0)) 453 454/* Traverse spi chain and get attributes */ 455 456#define SPI_CHAIN_ATTRIB(have, TDB_DIR, TDBP) do {\ 457 int s = spltdb(); \ 458 struct tdb *tmptdb = (TDBP); \ 459 \ 460 (have) = 0; \ 461 while (tmptdb && tmptdb->tdb_xform) { \ 462 if (tmptdb == NULL || tmptdb->tdb_flags & TDBF_INVALID) \ 463 break; \ 464 (have) |= TDB_ATTRIB(tmptdb); \ 465 tmptdb = tmptdb->TDB_DIR; \ 466 } \ 467 splx(s); \ 468} while (0) 469 470/* Misc. */ 471extern char *inet_ntoa4(struct in_addr); 472extern char *ipsp_address(union sockaddr_union); 473 474/* TDB management routines */ 475extern void tdb_add_inp(struct tdb *, struct inpcb *, int); 476extern u_int32_t reserve_spi(u_int32_t, u_int32_t, union sockaddr_union *, 477 union sockaddr_union *, u_int8_t, int *); 478extern struct tdb *gettdb(u_int32_t, union sockaddr_union *, u_int8_t); 479extern struct tdb *gettdbbyaddr(union sockaddr_union *, struct ipsec_policy *, 480 struct mbuf *, int); 481extern struct tdb *gettdbbysrc(union sockaddr_union *, struct ipsec_policy *, 482 struct mbuf *, int); 483extern void puttdb(struct tdb *); 484extern void tdb_delete(struct tdb *); 485extern struct tdb *tdb_alloc(void); 486extern int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 487extern int tdb_walk(int (*)(struct tdb *, void *, int), void *); 488 489/* XF_IP4 */ 490extern int ipe4_attach(void); 491extern int ipe4_init(struct tdb *, struct xformsw *, struct ipsecinit *); 492extern int ipe4_zeroize(struct tdb *); 493extern int ipip_output(struct mbuf *, struct tdb *, struct mbuf **, int, int, 494 struct tdb *); 495extern void ipe4_input __P((struct mbuf *, ...)); 496extern void ipip_input __P((struct mbuf *, int)); 497 498#ifdef INET 499extern void ip4_input __P((struct mbuf *, ...)); 500#endif /* INET */ 501 502#ifdef INET6 503extern int ip4_input6 __P((struct mbuf **, int *, int)); 504#endif /* INET */ 505 506/* XF_ETHERIP */ 507extern int etherip_output(struct mbuf *, struct tdb *, struct mbuf **, 508 int, int); 509extern void etherip_input __P((struct mbuf *, ...)); 510 511/* XF_AH */ 512extern int ah_attach(void); 513extern int ah_init(struct tdb *, struct xformsw *, struct ipsecinit *); 514extern int ah_zeroize(struct tdb *); 515extern int ah_output(struct mbuf *, struct tdb *, struct mbuf **, int, int, 516 struct tdb *); 517extern int ah_output_cb(void *); 518extern int ah_input(struct mbuf *, struct tdb *, int, int); 519extern int ah_input_cb(void *); 520extern int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 521extern int ah_massage_headers(struct mbuf **, int, int, int, int); 522 523#ifdef INET 524extern void ah4_input __P((struct mbuf *, ...)); 525extern int ah4_input_cb __P((struct mbuf *, ...)); 526#endif /* INET */ 527 528#ifdef INET6 529extern int ah6_input __P((struct mbuf **, int *, int)); 530extern int ah6_input_cb __P((struct mbuf *, int, int)); 531#endif /* INET6 */ 532 533/* XF_ESP */ 534extern int esp_attach(void); 535extern int esp_init(struct tdb *, struct xformsw *, struct ipsecinit *); 536extern int esp_zeroize(struct tdb *); 537extern int esp_output(struct mbuf *, struct tdb *, struct mbuf **, int, int, 538 struct tdb *); 539extern int esp_output_cb(void *); 540extern int esp_input(struct mbuf *, struct tdb *, int, int); 541extern int esp_input_cb(void *); 542extern int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 543 544#ifdef INET 545extern void esp4_input __P((struct mbuf *, ...)); 546extern int esp4_input_cb __P((struct mbuf *, ...)); 547#endif /* INET */ 548 549#ifdef INET6 550extern int esp6_input __P((struct mbuf **, int *, int)); 551extern int esp6_input_cb __P((struct mbuf *, int, int)); 552#endif /* INET6 */ 553 554/* XF_TCPSIGNATURE */ 555extern int tcp_signature_tdb_attach __P((void)); 556extern int tcp_signature_tdb_init __P((struct tdb *, struct xformsw *, 557 struct ipsecinit *)); 558extern int tcp_signature_tdb_zeroize __P((struct tdb *)); 559extern int tcp_signature_tdb_input __P((struct mbuf *, struct tdb *, int, 560 int)); 561extern int tcp_signature_tdb_output __P((struct mbuf *, struct tdb *, 562 struct mbuf **, int, int, 563 struct tdb *)); 564 565/* Padding */ 566extern caddr_t m_pad(struct mbuf *, int); 567 568/* Replay window */ 569extern int checkreplaywindow32(u_int32_t, u_int32_t, u_int32_t *, u_int32_t, 570 u_int32_t *); 571 572extern unsigned char ipseczeroes[]; 573 574/* Packet processing */ 575extern int ipsp_process_packet(struct mbuf *, struct tdb *, int, int, 576 struct tdb *); 577extern int ipsp_process_done(struct mbuf *, struct tdb *, struct tdb *); 578extern struct tdb *ipsp_spd_lookup(struct mbuf *, int, int, int *, int, 579 struct tdb *, struct inpcb *); 580extern int ipsec_common_input_cb(struct mbuf *, struct tdb *, int, int); 581extern int ipsp_acquire_sa(struct ipsec_policy *, union sockaddr_union *, 582 union sockaddr_union *, struct sockaddr_encap *, 583 struct mbuf *); 584extern struct ipsec_policy *ipsec_add_policy(struct sockaddr_encap *, 585 struct sockaddr_encap *, 586 union sockaddr_union *, int, int); 587extern int ipsp_match_policy(struct tdb *, struct ipsec_policy *, 588 struct mbuf *, int); 589extern int ipsec_delete_policy(struct ipsec_policy *); 590extern void ipsp_acquire_expirations(void *); 591extern struct ipsec_acquire *ipsp_pending_acquire(union sockaddr_union *); 592extern struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 593extern void ipsp_delete_acquire(struct ipsec_acquire *); 594extern void ipsp_clear_acquire(struct tdb *); 595extern void *ipsp_copy_ident(void *); 596extern int ipsp_is_unspecified(union sockaddr_union); 597extern void ipsp_reffree(struct ipsec_ref *); 598#endif /* _KERNEL */ 599#endif /* _NETINET_IPSP_H_ */ 600