1191762Simp/* $OpenBSD: ip_ipsp.h,v 1.245 2024/04/17 20:48:51 bluhm Exp $ */ 2191762Simp/* 3191762Simp * The authors of this code are John Ioannidis (ji@tla.org), 4191762Simp * Angelos D. Keromytis (kermit@csd.uch.gr), 5191762Simp * Niels Provos (provos@physnet.uni-hamburg.de) and 6191762Simp * Niklas Hallqvist (niklas@appli.se). 7191762Simp * 8191762Simp * The original version of this code was written by John Ioannidis 9191762Simp * for BSD/OS in Athens, Greece, in November 1995. 10191762Simp * 11191762Simp * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996, 12191762Simp * by Angelos D. Keromytis. 13191762Simp * 14191762Simp * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis 15191762Simp * and Niels Provos. 16191762Simp * 17191762Simp * Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist. 18191762Simp * 19191762Simp * Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis, 20191762Simp * Angelos D. Keromytis and Niels Provos. 21191762Simp * Copyright (c) 1999 Niklas Hallqvist. 22191762Simp * Copyright (c) 2001, Angelos D. Keromytis. 23191762Simp * 24191762Simp * Permission to use, copy, and modify this software with or without fee 25191762Simp * is hereby granted, provided that this entire notice is included in 26191762Simp * all copies of any software which is or includes a copy or 27191762Simp * modification of this software. 28191762Simp * You may use this code under the GNU public license if you so wish. Please 29191762Simp * contribute changes back to the authors under this freer than GPL license 30191762Simp * so that we may further the use of strong encryption without limitations to 31191762Simp * all. 32191762Simp * 33191762Simp * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 34191762Simp * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 35191762Simp * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 36191762Simp * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 37191762Simp * PURPOSE. 38191762Simp */ 39191762Simp 40191762Simp#ifndef _NETINET_IPSP_H_ 41191762Simp#define _NETINET_IPSP_H_ 42191762Simp 43191762Simp/* 44191762Simp * Locks used to protect struct members in this file: 45191762Simp * I immutable after creation 46191762Simp * a atomic operations 47191762Simp * N net lock 48191762Simp * A ipsec_acquire_mtx 49191762Simp * F ipsec_flows_mtx 50191762Simp * P ipo_tdb_mtx link policy to TDB global mutex 51191762Simp * D tdb_sadb_mtx SA database global mutex 52191762Simp * m tdb_mtx fields of struct tdb 53191762Simp * S pfsync fields of struct tdb 54191762Simp */ 55191762Simp 56191762Simp/* IPSP global definitions. */ 57191762Simp 58191762Simp#include <sys/types.h> 59191762Simp#include <netinet/in.h> 60191762Simp 61191762Simpunion sockaddr_union { 62191762Simp struct sockaddr sa; 63191762Simp struct sockaddr_in sin; 64191762Simp struct sockaddr_in6 sin6; 65191762Simp}; 66191762Simp 67191762Simp#define AH_HMAC_MAX_HASHLEN 32 /* 256 bits of authenticator for SHA512 */ 68191762Simp#define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */ 69191762Simp#define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */ 70191762Simp 71191762Simp/* Authenticator lengths */ 72191762Simp#define AH_MD5_ALEN 16 73191762Simp#define AH_SHA1_ALEN 20 74191762Simp#define AH_RMD160_ALEN 20 75191762Simp#define AH_SHA2_256_ALEN 32 76191762Simp#define AH_SHA2_384_ALEN 48 77191762Simp#define AH_SHA2_512_ALEN 64 78191762Simp#define AH_ALEN_MAX 64 /* Keep updated */ 79191762Simp 80191762Simp/* Reserved SPI numbers */ 81191762Simp#define SPI_LOCAL_USE 0 82191762Simp#define SPI_RESERVED_MIN 1 83191762Simp#define SPI_RESERVED_MAX 255 84191762Simp 85191762Simp/* Reserved CPI numbers */ 86191762Simp#define CPI_RESERVED_MIN 1 87191762Simp#define CPI_RESERVED_MAX 255 88191762Simp#define CPI_PRIVATE_MIN 61440 89191762Simp#define CPI_PRIVATE_MAX 65535 90191762Simp 91191762Simp/* sysctl default values */ 92191762Simp#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */ 93191762Simp#define IPSEC_DEFAULT_PFS 1 94191762Simp#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0 95191762Simp#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0 96191762Simp#define IPSEC_DEFAULT_SOFT_BYTES 0 97191762Simp#define IPSEC_DEFAULT_EXP_BYTES 0 98191762Simp#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000 99191762Simp#define IPSEC_DEFAULT_EXP_TIMEOUT 86400 100191762Simp#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600 101191762Simp#define IPSEC_DEFAULT_EXP_FIRST_USE 7200 102191762Simp#define IPSEC_DEFAULT_DEF_ENC "aes" 103191762Simp#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1" 104191762Simp#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30 105191762Simp#define IPSEC_DEFAULT_DEF_COMP "deflate" 106191762Simp 107191762Simpstruct sockaddr_encap { 108191762Simp u_int8_t sen_len; /* length */ 109191762Simp u_int8_t sen_family; /* PF_KEY */ 110191762Simp u_int16_t sen_type; /* see SENT_* */ 111191762Simp union { 112191762Simp struct { /* SENT_IP4 */ 113191762Simp u_int8_t Direction; 114191762Simp struct in_addr Src; 115191762Simp struct in_addr Dst; 116191762Simp u_int8_t Proto; 117191762Simp u_int16_t Sport; 118191762Simp u_int16_t Dport; 119191762Simp } Sip4; 120191762Simp 121191762Simp struct { /* SENT_IP6 */ 122191762Simp u_int8_t Direction; 123191762Simp struct in6_addr Src; 124191762Simp struct in6_addr Dst; 125191762Simp u_int8_t Proto; 126191762Simp u_int16_t Sport; 127191762Simp u_int16_t Dport; 128191762Simp } Sip6; 129191762Simp } Sen; 130191762Simp}; 131191762Simp 132191762Simp#define IPSP_DIRECTION_IN 0x1 133191762Simp#define IPSP_DIRECTION_OUT 0x2 134191762Simp 135191762Simpstruct ipsecstat { 136191762Simp uint64_t ipsec_tunnels; /* Number of active tunnels */ 137191762Simp uint64_t ipsec_prevtunnels; /* Past number of tunnels */ 138191762Simp uint64_t ipsec_ipackets; /* Input IPsec packets */ 139191762Simp uint64_t ipsec_opackets; /* Output IPsec packets */ 140191762Simp uint64_t ipsec_ibytes; /* Input bytes */ 141191762Simp uint64_t ipsec_obytes; /* Output bytes */ 142191762Simp uint64_t ipsec_idecompbytes; /* Input bytes, decompressed */ 143191762Simp uint64_t ipsec_ouncompbytes; /* Output bytes, uncompressed */ 144191762Simp uint64_t ipsec_idrops; /* Dropped on input */ 145191762Simp uint64_t ipsec_odrops; /* Dropped on output */ 146191762Simp uint64_t ipsec_crypto; /* Crypto processing failure */ 147191762Simp uint64_t ipsec_notdb; /* No TDB was found */ 148191762Simp uint64_t ipsec_noxform; /* Crypto error */ 149191762Simp uint64_t ipsec_exctdb; /* TDBs with hardlimit excess */ 150191762Simp}; 151191762Simp 152191762Simpstruct ipsec_level { 153191762Simp u_char sl_auth; /* Authentication level */ 154191762Simp u_char sl_esp_trans; /* ESP transport level */ 155191762Simp u_char sl_esp_network; /* ESP network (encapsulation) level */ 156191762Simp u_char sl_ipcomp; /* Compression level */ 157191762Simp}; 158191762Simp 159191762Simp#ifdef _KERNEL 160191762Simp 161191762Simp#include <sys/timeout.h> 162191762Simp#include <sys/tree.h> 163191762Simp#include <sys/queue.h> 164191762Simp#include <net/radix.h> 165191762Simp#include <sys/percpu.h> 166191762Simp 167191762Simpenum ipsec_counters { 168191762Simp ipsec_tunnels, 169191762Simp ipsec_prevtunnels, 170191762Simp ipsec_ipackets, 171191762Simp ipsec_opackets, 172191762Simp ipsec_ibytes, 173191762Simp ipsec_obytes, 174191762Simp ipsec_idecompbytes, 175191762Simp ipsec_ouncompbytes, 176191762Simp ipsec_idrops, 177191762Simp ipsec_odrops, 178191762Simp ipsec_crypto, 179191762Simp ipsec_notdb, 180191762Simp ipsec_noxform, 181191762Simp ipsec_exctdb, 182191762Simp ipsec_ncounters 183191762Simp}; 184191762Simp 185191762Simpextern struct cpumem *ipseccounters; 186191762Simp 187191762Simpstatic inline void 188191762Simpipsecstat_inc(enum ipsec_counters c) 189191762Simp{ 190191762Simp counters_inc(ipseccounters, c); 191191762Simp} 192191762Simp 193191762Simpstatic inline void 194191762Simpipsecstat_dec(enum ipsec_counters c) 195191762Simp{ 196191762Simp counters_dec(ipseccounters, c); 197191762Simp} 198191762Simp 199191762Simpstatic inline void 200191762Simpipsecstat_add(enum ipsec_counters c, uint64_t v) 201191762Simp{ 202191762Simp counters_add(ipseccounters, c, v); 203191762Simp} 204191762Simp 205191762Simpstatic inline void 206191762Simpipsecstat_pkt(enum ipsec_counters p, enum ipsec_counters b, uint64_t v) 207191762Simp{ 208191762Simp counters_pkt(ipseccounters, p, b, v); 209191762Simp} 210191762Simp 211191762Simpstruct m_tag; 212191762Simp 213191762Simp#define sen_data Sen.Data 214191762Simp#define sen_ip_src Sen.Sip4.Src 215191762Simp#define sen_ip_dst Sen.Sip4.Dst 216191762Simp#define sen_proto Sen.Sip4.Proto 217191762Simp#define sen_sport Sen.Sip4.Sport 218191762Simp#define sen_dport Sen.Sip4.Dport 219191762Simp#define sen_direction Sen.Sip4.Direction 220191762Simp#define sen_ip6_src Sen.Sip6.Src 221191762Simp#define sen_ip6_dst Sen.Sip6.Dst 222191762Simp#define sen_ip6_proto Sen.Sip6.Proto 223191762Simp#define sen_ip6_sport Sen.Sip6.Sport 224191762Simp#define sen_ip6_dport Sen.Sip6.Dport 225191762Simp#define sen_ip6_direction Sen.Sip6.Direction 226191762Simp 227191762Simp/* 228191762Simp * The "type" is really part of the address as far as the routing 229191762Simp * system is concerned. By using only one bit in the type field 230191762Simp * for each type, we sort-of make sure that different types of 231191762Simp * encapsulation addresses won't be matched against the wrong type. 232191762Simp * 233191762Simp */ 234191762Simp 235191762Simp#define SENT_IP4 0x0001 /* data is two struct in_addr */ 236191762Simp#define SENT_IP6 0x0002 237191762Simp 238191762Simp#define SENT_LEN sizeof(struct sockaddr_encap) 239191762Simp 240191762Simpstruct ipsec_id { 241191762Simp u_int16_t type; /* Subtype of data */ 242191762Simp int16_t len; /* Length of data following */ 243191762Simp}; 244191762Simp 245191762Simpstruct ipsec_ids { 246191762Simp LIST_ENTRY(ipsec_ids) id_gc_list; /* [F] */ 247191762Simp RBT_ENTRY(ipsec_ids) id_node_id; /* [F] */ 248191762Simp RBT_ENTRY(ipsec_ids) id_node_flow; /* [F] */ 249191762Simp struct ipsec_id *id_local; /* [I] */ 250191762Simp struct ipsec_id *id_remote; /* [I] */ 251191762Simp u_int32_t id_flow; /* [I] */ 252191762Simp u_int id_refcount; /* [F] */ 253191762Simp u_int id_gc_ttl; /* [F] */ 254}; 255RBT_HEAD(ipsec_ids_flows, ipsec_ids); 256RBT_HEAD(ipsec_ids_tree, ipsec_ids); 257 258struct ipsec_acquire { 259 union sockaddr_union ipa_addr; 260 u_int32_t ipa_seq; 261 struct sockaddr_encap ipa_info; 262 struct sockaddr_encap ipa_mask; 263 struct refcnt ipa_refcnt; 264 struct timeout ipa_timeout; 265 struct ipsec_policy *ipa_policy; /* [A] back pointer */ 266 TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next; /* [A] per policy */ 267 TAILQ_ENTRY(ipsec_acquire) ipa_next; /* [A] global list */ 268}; 269 270TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire); 271 272struct ipsec_policy { 273 struct radix_node ipo_nodes[2]; /* radix tree glue */ 274 struct sockaddr_encap ipo_addr; 275 struct sockaddr_encap ipo_mask; 276 277 union sockaddr_union ipo_src; /* Local address to use */ 278 union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed: 279 * - on output, we try to 280 * contact the remote host 281 * directly (if needed). 282 * - on input, we accept on if 283 * the inner source is the 284 * same as the outer source 285 * address, or if transport 286 * mode was used. 287 */ 288 289 u_int64_t ipo_last_searched; /* [P] Timestamp of lookup */ 290 291 u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */ 292 u_int8_t ipo_type; /* USE/ACQUIRE/... */ 293 u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */ 294 u_int ipo_rdomain; 295 296 struct refcnt ipo_refcnt; 297 298 struct tdb *ipo_tdb; /* [P] Cached TDB entry */ 299 300 struct ipsec_ids *ipo_ids; 301 302 struct ipsec_acquire_head ipo_acquires; /* [A] List of acquires */ 303 TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* [P] List TDB policies */ 304 TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */ 305}; 306 307#define IPSP_POLICY_NONE 0x0000 /* No flags set */ 308#define IPSP_POLICY_STATIC 0x0002 /* Static policy */ 309 310#define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */ 311#define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */ 312#define IPSP_IPSEC_REQUIRE 2 /* Require SA */ 313#define IPSP_PERMIT 3 /* Permit traffic through */ 314#define IPSP_DENY 4 /* Deny traffic */ 315#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */ 316 317/* Identity types */ 318#define IPSP_IDENTITY_NONE 0 319#define IPSP_IDENTITY_PREFIX 1 320#define IPSP_IDENTITY_FQDN 2 321#define IPSP_IDENTITY_USERFQDN 3 322#define IPSP_IDENTITY_ASN1_DN 4 323 324struct tdb { /* tunnel descriptor block */ 325 /* 326 * Each TDB is on three hash tables: one keyed on dst/spi/sproto, 327 * one keyed on dst/sproto, and one keyed on src/sproto. The first 328 * is used for finding a specific TDB, the second for finding TDBs 329 * for outgoing policy matching, and the third for incoming 330 * policy matching. The following three fields maintain the hash 331 * queues in those three tables. 332 */ 333 struct tdb *tdb_hnext; /* [D] dst/spi/sproto table */ 334 struct tdb *tdb_dnext; /* [D] dst/sproto table */ 335 struct tdb *tdb_snext; /* [D] src/sproto table */ 336 struct tdb *tdb_inext; 337 struct tdb *tdb_onext; 338 SIMPLEQ_ENTRY(tdb) tdb_walk; /* [N] temp list for tdb walker */ 339 340 struct refcnt tdb_refcnt; 341 struct mutex tdb_mtx; 342 343 const struct xformsw *tdb_xform; /* Transform to use */ 344 const struct enc_xform *tdb_encalgxform; /* Enc algorithm */ 345 const struct auth_hash *tdb_authalgxform; /* Auth algorithm */ 346 const struct comp_algo *tdb_compalgxform; /* Compression algo */ 347 348#define TDBF_UNIQUE 0x00001 /* This should not be used by others */ 349#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */ 350#define TDBF_BYTES 0x00004 /* Check the byte counters */ 351#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */ 352#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */ 353#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */ 354#define TDBF_DELETED 0x00040 /* This TDB has already been deleted */ 355#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */ 356#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */ 357#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */ 358#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */ 359#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */ 360#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */ 361#define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */ 362#define TDBF_UDPENCAP 0x20000 /* UDP encapsulation */ 363#define TDBF_PFSYNC 0x40000 /* TDB will be synced */ 364#define TDBF_PFSYNC_RPL 0x80000 /* Replay counter should be bumped */ 365#define TDBF_ESN 0x100000 /* 64-bit sequence numbers (ESN) */ 366#define TDBF_PFSYNC_SNAPPED 0x200000 /* entry is being dispatched to peer */ 367#define TDBF_IFACE 0x400000 /* entry policy is via sec(4) */ 368 369#define TDBF_BITS ("\20" \ 370 "\1UNIQUE\2TIMER\3BYTES\4ALLOCATIONS" \ 371 "\5INVALID\6FIRSTUSE\7DELETED\10SOFT_TIMER" \ 372 "\11SOFT_BYTES\12SOFT_ALLOCATIONS\13SOFT_FIRSTUSE\14PFS" \ 373 "\15TUNNELING" \ 374 "\21USEDTUNNEL\22UDPENCAP\23PFSYNC\24PFSYNC_RPL" \ 375 "\25ESN" "\26IFACE") 376 377 u_int32_t tdb_flags; /* [m] Flags related to this TDB */ 378 379 struct timeout tdb_timer_tmo; 380 struct timeout tdb_first_tmo; 381 struct timeout tdb_stimer_tmo; 382 struct timeout tdb_sfirst_tmo; 383 384 u_int32_t tdb_seq; /* Tracking number for PFKEY */ 385 u_int32_t tdb_exp_allocations; /* Expire after so many flows */ 386 u_int32_t tdb_soft_allocations; /* Expiration warning */ 387 u_int32_t tdb_cur_allocations; /* Total number of allocs */ 388 389 u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */ 390 u_int64_t tdb_soft_bytes; /* Expiration warning */ 391 u_int64_t tdb_cur_bytes; /* Current count of bytes */ 392 393 u_int64_t tdb_exp_timeout; /* When does the SPI expire */ 394 u_int64_t tdb_soft_timeout; /* Send soft-expire warning */ 395 u_int64_t tdb_established; /* When was SPI established */ 396 397 u_int64_t tdb_first_use; /* When was it first used */ 398 u_int64_t tdb_soft_first_use; /* Soft warning */ 399 u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use + 400 * tdb_exp_first_use <= curtime 401 */ 402 403 u_int64_t tdb_last_used; /* When was this SA last used */ 404 u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */ 405 406 struct cpumem *tdb_counters; /* stats about this TDB */ 407 408 u_int64_t tdb_cryptoid; /* Crypto session ID */ 409 410 u_int32_t tdb_spi; /* [I] SPI */ 411 u_int16_t tdb_amxkeylen; /* Raw authentication key length */ 412 u_int16_t tdb_emxkeylen; /* Raw encryption key length */ 413 u_int16_t tdb_ivlen; /* IV length */ 414 u_int8_t tdb_sproto; /* [I] IPsec protocol */ 415 u_int8_t tdb_wnd; /* Replay window */ 416 u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */ 417 u_int8_t tdb_iface_dir; /* [I] sec(4) iface direction */ 418 419 union sockaddr_union tdb_dst; /* [N] Destination address */ 420 union sockaddr_union tdb_src; /* [N] Source address */ 421 422 u_int8_t *tdb_amxkey; /* Raw authentication key */ 423 u_int8_t *tdb_emxkey; /* Raw encryption key */ 424 425#define TDB_REPLAYWASTE 32 426#define TDB_REPLAYMAX (2100+TDB_REPLAYWASTE) 427 428 u_int64_t tdb_rpl; /* Replay counter */ 429 u_int32_t tdb_seen[howmany(TDB_REPLAYMAX, 32)]; /* Anti-replay window */ 430 431 u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */ 432 433 struct ipsec_ids *tdb_ids; /* Src/Dst ID for this SA */ 434 int tdb_ids_swapped; /* XXX */ 435 436 u_int32_t tdb_mtu; /* MTU at this point in the chain */ 437 u_int64_t tdb_mtutimeout; /* When to ignore this entry */ 438 439 u_int16_t tdb_udpencap_port; /* Peer UDP port */ 440 441 u_int16_t tdb_tag; /* Packet filter tag */ 442 u_int32_t tdb_tap; /* Alternate enc(4) interface */ 443 unsigned int tdb_iface; /* [I] sec(4) iface */ 444 445 u_int tdb_rdomain; /* [I] Routing domain */ 446 u_int tdb_rdomain_post; /* [I] Change domain */ 447 448 struct sockaddr_encap tdb_filter; /* What traffic is acceptable */ 449 struct sockaddr_encap tdb_filtermask; /* And the mask */ 450 451 TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; /* [P] */ 452 TAILQ_ENTRY(tdb) tdb_sync_entry; /* [S] pfsync tdb queue */ 453 u_int32_t tdb_updates; /* [S] pfsync update counter */ 454}; 455 456enum tdb_counters { 457 tdb_ipackets, /* Input IPsec packets */ 458 tdb_opackets, /* Output IPsec packets */ 459 tdb_ibytes, /* Input bytes */ 460 tdb_obytes, /* Output bytes */ 461 tdb_idrops, /* Dropped on input */ 462 tdb_odrops, /* Dropped on output */ 463 tdb_idecompbytes, /* Input bytes, decompressed */ 464 tdb_ouncompbytes, /* Output bytes, uncompressed */ 465 tdb_ncounters 466}; 467 468static inline void 469tdbstat_inc(struct tdb *tdb, enum tdb_counters c) 470{ 471 counters_inc(tdb->tdb_counters, c); 472} 473 474static inline void 475tdbstat_add(struct tdb *tdb, enum tdb_counters c, uint64_t v) 476{ 477 counters_add(tdb->tdb_counters, c, v); 478} 479 480static inline void 481tdbstat_pkt(struct tdb *tdb, enum tdb_counters pc, enum tdb_counters bc, 482 uint64_t bytes) 483{ 484 counters_pkt(tdb->tdb_counters, pc, bc, bytes); 485} 486 487struct tdb_ident { 488 u_int32_t spi; 489 union sockaddr_union dst; 490 u_int8_t proto; 491 u_int rdomain; 492}; 493 494struct tdb_crypto { 495 union sockaddr_union tc_dst; 496 u_int64_t tc_rpl; 497 u_int32_t tc_spi; 498 int tc_protoff; 499 int tc_skip; 500 u_int tc_rdomain; 501 u_int8_t tc_proto; 502}; 503 504struct ipsecinit { 505 u_int8_t *ii_enckey; 506 u_int8_t *ii_authkey; 507 u_int16_t ii_enckeylen; 508 u_int16_t ii_authkeylen; 509 u_int8_t ii_encalg; 510 u_int8_t ii_authalg; 511 u_int8_t ii_compalg; 512}; 513 514/* xform IDs */ 515#define XF_IP4 1 /* IP inside IP */ 516#define XF_AH 2 /* AH */ 517#define XF_ESP 3 /* ESP */ 518#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */ 519#define XF_IPCOMP 6 /* IPCOMP */ 520 521/* xform attributes */ 522#define XFT_AUTH 0x0001 523#define XFT_CONF 0x0100 524#define XFT_COMP 0x1000 525 526#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */ 527 528struct xformsw { 529 u_short xf_type; /* Unique ID of xform */ 530 u_short xf_flags; /* flags (see below) */ 531 char *xf_name; /* human-readable name */ 532 int (*xf_attach)(void); /* called at config time */ 533 int (*xf_init)(struct tdb *, const struct xformsw *, 534 struct ipsecinit *); 535 int (*xf_zeroize)(struct tdb *); /* termination */ 536 int (*xf_input)(struct mbuf **, struct tdb *, int, int); 537 int (*xf_output)(struct mbuf *, struct tdb *, int, int); 538}; 539 540extern int ipsec_in_use; 541extern u_int64_t ipsec_last_added; 542extern int encdebug; /* enable message reporting */ 543extern struct pool tdb_pool; 544 545extern int ipsec_keep_invalid; /* lifetime of embryonic SAs (in sec) */ 546extern int ipsec_require_pfs; /* use Perfect Forward Secrecy */ 547extern int ipsec_expire_acquire; /* wait for security assoc. (in sec) */ 548extern int ipsec_soft_allocations; /* flows/SA before renegotiation */ 549extern int ipsec_exp_allocations; /* num. of flows/SA before it expires */ 550extern int ipsec_soft_bytes; /* bytes/SA before renegotiation */ 551extern int ipsec_exp_bytes; /* num of bytes/SA before it expires */ 552extern int ipsec_soft_timeout; /* seconds/SA before renegotiation */ 553extern int ipsec_exp_timeout; /* seconds/SA before it expires */ 554extern int ipsec_soft_first_use; /* seconds between 1st asso & renego */ 555extern int ipsec_exp_first_use; /* seconds between 1st asso & expire */ 556 557/* 558 * Names for IPsec sysctl objects 559 */ 560#define IPSEC_ENCDEBUG IPCTL_ENCDEBUG /* 12 */ 561#define IPSEC_STATS IPCTL_IPSEC_STATS /* 13 */ 562#define IPSEC_EXPIRE_ACQUIRE IPCTL_IPSEC_EXPIRE_ACQUIRE /* 14 */ 563#define IPSEC_EMBRYONIC_SA_TIMEOUT IPCTL_IPSEC_EMBRYONIC_SA_TIMEOUT/* 15 */ 564#define IPSEC_REQUIRE_PFS IPCTL_IPSEC_REQUIRE_PFS /* 16 */ 565#define IPSEC_SOFT_ALLOCATIONS IPCTL_IPSEC_SOFT_ALLOCATIONS /* 17 */ 566#define IPSEC_ALLOCATIONS IPCTL_IPSEC_ALLOCATIONS /* 18 */ 567#define IPSEC_SOFT_BYTES IPCTL_IPSEC_SOFT_BYTES /* 19 */ 568#define IPSEC_BYTES IPCTL_IPSEC_BYTES /* 20 */ 569#define IPSEC_TIMEOUT IPCTL_IPSEC_TIMEOUT /* 21 */ 570#define IPSEC_SOFT_TIMEOUT IPCTL_IPSEC_SOFT_TIMEOUT /* 22 */ 571#define IPSEC_SOFT_FIRSTUSE IPCTL_IPSEC_SOFT_FIRSTUSE /* 23 */ 572#define IPSEC_FIRSTUSE IPCTL_IPSEC_FIRSTUSE /* 24 */ 573#define IPSEC_MAXID 25 574 575extern char ipsec_def_enc[]; 576extern char ipsec_def_auth[]; 577extern char ipsec_def_comp[]; 578 579extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head; 580 581extern struct mutex tdb_sadb_mtx; 582extern struct mutex ipo_tdb_mtx; 583 584struct cryptop; 585 586/* Misc. */ 587const char *ipsp_address(union sockaddr_union *, char *, socklen_t); 588 589/* SPD tables */ 590struct radix_node_head *spd_table_add(unsigned int); 591struct radix_node_head *spd_table_get(unsigned int); 592int spd_table_walk(unsigned int, 593 int (*walker)(struct ipsec_policy *, void *, unsigned int), void *); 594 595/* TDB management routines */ 596uint32_t reserve_spi(u_int, u_int32_t, u_int32_t, union sockaddr_union *, 597 union sockaddr_union *, u_int8_t, int *); 598struct tdb *gettdb_dir(u_int, u_int32_t, union sockaddr_union *, u_int8_t, int); 599#define gettdb(a,b,c,d) gettdb_dir((a),(b),(c),(d),0) 600#define gettdb_rev(a,b,c,d) gettdb_dir((a),(b),(c),(d),1) 601struct tdb *gettdbbydst(u_int, union sockaddr_union *, u_int8_t, 602 struct ipsec_ids *, 603 struct sockaddr_encap *, struct sockaddr_encap *); 604struct tdb *gettdbbysrc(u_int, union sockaddr_union *, u_int8_t, 605 struct ipsec_ids *, 606 struct sockaddr_encap *, struct sockaddr_encap *); 607struct tdb *gettdbbysrcdst_dir(u_int, u_int32_t, union sockaddr_union *, 608 union sockaddr_union *, u_int8_t, int); 609#define gettdbbysrcdst(a,b,c,d,e) gettdbbysrcdst_dir((a),(b),(c),(d),(e),0) 610#define gettdbbysrcdst_rev(a,b,c,d,e) gettdbbysrcdst_dir((a),(b),(c),(d),(e),1) 611void puttdb(struct tdb *); 612void puttdb_locked(struct tdb *); 613void tdb_delete(struct tdb *); 614struct tdb *tdb_alloc(u_int); 615struct tdb *tdb_ref(struct tdb *); 616void tdb_unref(struct tdb *); 617void tdb_free(struct tdb *); 618int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *); 619void tdb_unlink(struct tdb *); 620void tdb_unlink_locked(struct tdb *); 621void tdb_cleanspd(struct tdb *); 622void tdb_unbundle(struct tdb *); 623void tdb_addtimeouts(struct tdb *); 624void tdb_deltimeouts(struct tdb *); 625int tdb_walk(u_int, int (*)(struct tdb *, void *, int), void *); 626void tdb_printit(void *, int, int (*)(const char *, ...)); 627 628/* XF_IP4 */ 629int ipe4_attach(void); 630int ipe4_init(struct tdb *, const struct xformsw *, struct ipsecinit *); 631int ipe4_zeroize(struct tdb *); 632int ipe4_input(struct mbuf **, struct tdb *, int, int); 633 634/* XF_AH */ 635int ah_attach(void); 636int ah_init(struct tdb *, const struct xformsw *, struct ipsecinit *); 637int ah_zeroize(struct tdb *); 638int ah_input(struct mbuf **, struct tdb *, int, int); 639int ah_output(struct mbuf *, struct tdb *, int, int); 640int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t); 641 642int ah46_input(struct mbuf **, int *, int, int); 643void ah4_ctlinput(int, struct sockaddr *, u_int, void *); 644void udpencap_ctlinput(int, struct sockaddr *, u_int, void *); 645 646/* XF_ESP */ 647int esp_attach(void); 648int esp_init(struct tdb *, const struct xformsw *, struct ipsecinit *); 649int esp_zeroize(struct tdb *); 650int esp_input(struct mbuf **, struct tdb *, int, int); 651int esp_output(struct mbuf *, struct tdb *, int, int); 652int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 653 654int esp46_input(struct mbuf **, int *, int, int); 655void esp4_ctlinput(int, struct sockaddr *, u_int, void *); 656 657/* XF_IPCOMP */ 658int ipcomp_attach(void); 659int ipcomp_init(struct tdb *, const struct xformsw *, struct ipsecinit *); 660int ipcomp_zeroize(struct tdb *); 661int ipcomp_input(struct mbuf **, struct tdb *, int, int); 662int ipcomp_output(struct mbuf *, struct tdb *, int, int); 663int ipcomp_sysctl(int *, u_int, void *, size_t *, void *, size_t); 664int ipcomp46_input(struct mbuf **, int *, int, int); 665 666/* XF_TCPSIGNATURE */ 667int tcp_signature_tdb_attach(void); 668int tcp_signature_tdb_init(struct tdb *, const struct xformsw *, 669 struct ipsecinit *); 670int tcp_signature_tdb_zeroize(struct tdb *); 671int tcp_signature_tdb_input(struct mbuf **, struct tdb *, int, int); 672int tcp_signature_tdb_output(struct mbuf *, struct tdb *, int, int); 673 674/* Replay window */ 675int checkreplaywindow(struct tdb *, u_int64_t, u_int32_t, u_int32_t *, int); 676 677/* Packet processing */ 678int ipsp_process_packet(struct mbuf *, struct tdb *, int, int); 679int ipsp_process_done(struct mbuf *, struct tdb *); 680int ipsp_spd_lookup(struct mbuf *, int, int, int, struct tdb *, 681 const struct ipsec_level *, struct tdb **, struct ipsec_ids *); 682int ipsp_is_unspecified(union sockaddr_union); 683int ipsp_aux_match(struct tdb *, struct ipsec_ids *, 684 struct sockaddr_encap *, struct sockaddr_encap *); 685int ipsp_ids_match(struct ipsec_ids *, struct ipsec_ids *); 686struct ipsec_ids *ipsp_ids_insert(struct ipsec_ids *); 687struct ipsec_ids *ipsp_ids_lookup(u_int32_t); 688void ipsp_ids_free(struct ipsec_ids *); 689 690void ipsp_init(void); 691void ipsec_init(void); 692int ipsec_sysctl(int *, u_int, void *, size_t *, void *, size_t); 693int ipsec_common_input(struct mbuf **, int, int, int, int, int); 694int ipsec_common_input_cb(struct mbuf **, struct tdb *, int, int); 695int ipsec_input_disabled(struct mbuf **, int *, int, int); 696int ipsec_protoff(struct mbuf *, int, int); 697int ipsec_delete_policy(struct ipsec_policy *); 698ssize_t ipsec_hdrsz(struct tdb *); 699void ipsec_adjust_mtu(struct mbuf *, u_int32_t); 700void ipsec_set_mtu(struct tdb *, u_int32_t); 701struct ipsec_acquire *ipsec_get_acquire(u_int32_t); 702void ipsec_unref_acquire(struct ipsec_acquire *); 703int ipsec_forward_check(struct mbuf *, int, int); 704int ipsec_local_check(struct mbuf *, int, int, int); 705 706#endif /* _KERNEL */ 707#endif /* _NETINET_IPSP_H_ */ 708