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/* $OpenBSD: ip_ipsp.h,v 1.245 2024/04/17 20:48:51 bluhm Exp $ */
/*
* The authors of this code are John Ioannidis (ji@tla.org),
* Angelos D. Keromytis (kermit@csd.uch.gr),
* Niels Provos (provos@physnet.uni-hamburg.de) and
* Niklas Hallqvist (niklas@appli.se).
*
* The original version of this code was written by John Ioannidis
* for BSD/OS in Athens, Greece, in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis.
*
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
* and Niels Provos.
*
* Additional features in 1999 by Angelos D. Keromytis and Niklas Hallqvist.
*
* Copyright (c) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
* Angelos D. Keromytis and Niels Provos.
* Copyright (c) 1999 Niklas Hallqvist.
* Copyright (c) 2001, Angelos D. Keromytis.
*
* Permission to use, copy, and modify this software with or without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
#ifndef _NETINET_IPSP_H_
#define _NETINET_IPSP_H_
/*
* Locks used to protect struct members in this file:
* I immutable after creation
* a atomic operations
* N net lock
* A ipsec_acquire_mtx
* F ipsec_flows_mtx
* P ipo_tdb_mtx link policy to TDB global mutex
* D tdb_sadb_mtx SA database global mutex
* m tdb_mtx fields of struct tdb
* S pfsync fields of struct tdb
*/
/* IPSP global definitions. */
#include <sys/types.h>
#include <netinet/in.h>
union sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
#define AH_HMAC_MAX_HASHLEN 32 /* 256 bits of authenticator for SHA512 */
#define AH_HMAC_RPLENGTH 4 /* 32 bits of replay counter */
#define AH_HMAC_INITIAL_RPL 1 /* Replay counter initial value */
/* Authenticator lengths */
#define AH_MD5_ALEN 16
#define AH_SHA1_ALEN 20
#define AH_RMD160_ALEN 20
#define AH_SHA2_256_ALEN 32
#define AH_SHA2_384_ALEN 48
#define AH_SHA2_512_ALEN 64
#define AH_ALEN_MAX 64 /* Keep updated */
/* Reserved SPI numbers */
#define SPI_LOCAL_USE 0
#define SPI_RESERVED_MIN 1
#define SPI_RESERVED_MAX 255
/* Reserved CPI numbers */
#define CPI_RESERVED_MIN 1
#define CPI_RESERVED_MAX 255
#define CPI_PRIVATE_MIN 61440
#define CPI_PRIVATE_MAX 65535
/* sysctl default values */
#define IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT 60 /* 1 minute */
#define IPSEC_DEFAULT_PFS 1
#define IPSEC_DEFAULT_SOFT_ALLOCATIONS 0
#define IPSEC_DEFAULT_EXP_ALLOCATIONS 0
#define IPSEC_DEFAULT_SOFT_BYTES 0
#define IPSEC_DEFAULT_EXP_BYTES 0
#define IPSEC_DEFAULT_SOFT_TIMEOUT 80000
#define IPSEC_DEFAULT_EXP_TIMEOUT 86400
#define IPSEC_DEFAULT_SOFT_FIRST_USE 3600
#define IPSEC_DEFAULT_EXP_FIRST_USE 7200
#define IPSEC_DEFAULT_DEF_ENC "aes"
#define IPSEC_DEFAULT_DEF_AUTH "hmac-sha1"
#define IPSEC_DEFAULT_EXPIRE_ACQUIRE 30
#define IPSEC_DEFAULT_DEF_COMP "deflate"
struct sockaddr_encap {
u_int8_t sen_len; /* length */
u_int8_t sen_family; /* PF_KEY */
u_int16_t sen_type; /* see SENT_* */
union {
struct { /* SENT_IP4 */
u_int8_t Direction;
struct in_addr Src;
struct in_addr Dst;
u_int8_t Proto;
u_int16_t Sport;
u_int16_t Dport;
} Sip4;
struct { /* SENT_IP6 */
u_int8_t Direction;
struct in6_addr Src;
struct in6_addr Dst;
u_int8_t Proto;
u_int16_t Sport;
u_int16_t Dport;
} Sip6;
} Sen;
};
#define IPSP_DIRECTION_IN 0x1
#define IPSP_DIRECTION_OUT 0x2
struct ipsecstat {
uint64_t ipsec_tunnels; /* Number of active tunnels */
uint64_t ipsec_prevtunnels; /* Past number of tunnels */
uint64_t ipsec_ipackets; /* Input IPsec packets */
uint64_t ipsec_opackets; /* Output IPsec packets */
uint64_t ipsec_ibytes; /* Input bytes */
uint64_t ipsec_obytes; /* Output bytes */
uint64_t ipsec_idecompbytes; /* Input bytes, decompressed */
uint64_t ipsec_ouncompbytes; /* Output bytes, uncompressed */
uint64_t ipsec_idrops; /* Dropped on input */
uint64_t ipsec_odrops; /* Dropped on output */
uint64_t ipsec_crypto; /* Crypto processing failure */
uint64_t ipsec_notdb; /* No TDB was found */
uint64_t ipsec_noxform; /* Crypto error */
uint64_t ipsec_exctdb; /* TDBs with hardlimit excess */
};
struct ipsec_level {
u_char sl_auth; /* Authentication level */
u_char sl_esp_trans; /* ESP transport level */
u_char sl_esp_network; /* ESP network (encapsulation) level */
u_char sl_ipcomp; /* Compression level */
};
#ifdef _KERNEL
#include <sys/timeout.h>
#include <sys/tree.h>
#include <sys/queue.h>
#include <net/radix.h>
#include <sys/percpu.h>
enum ipsec_counters {
ipsec_tunnels,
ipsec_prevtunnels,
ipsec_ipackets,
ipsec_opackets,
ipsec_ibytes,
ipsec_obytes,
ipsec_idecompbytes,
ipsec_ouncompbytes,
ipsec_idrops,
ipsec_odrops,
ipsec_crypto,
ipsec_notdb,
ipsec_noxform,
ipsec_exctdb,
ipsec_ncounters
};
extern struct cpumem *ipseccounters;
static inline void
ipsecstat_inc(enum ipsec_counters c)
{
counters_inc(ipseccounters, c);
}
static inline void
ipsecstat_dec(enum ipsec_counters c)
{
counters_dec(ipseccounters, c);
}
static inline void
ipsecstat_add(enum ipsec_counters c, uint64_t v)
{
counters_add(ipseccounters, c, v);
}
static inline void
ipsecstat_pkt(enum ipsec_counters p, enum ipsec_counters b, uint64_t v)
{
counters_pkt(ipseccounters, p, b, v);
}
struct m_tag;
#define sen_data Sen.Data
#define sen_ip_src Sen.Sip4.Src
#define sen_ip_dst Sen.Sip4.Dst
#define sen_proto Sen.Sip4.Proto
#define sen_sport Sen.Sip4.Sport
#define sen_dport Sen.Sip4.Dport
#define sen_direction Sen.Sip4.Direction
#define sen_ip6_src Sen.Sip6.Src
#define sen_ip6_dst Sen.Sip6.Dst
#define sen_ip6_proto Sen.Sip6.Proto
#define sen_ip6_sport Sen.Sip6.Sport
#define sen_ip6_dport Sen.Sip6.Dport
#define sen_ip6_direction Sen.Sip6.Direction
/*
* The "type" is really part of the address as far as the routing
* system is concerned. By using only one bit in the type field
* for each type, we sort-of make sure that different types of
* encapsulation addresses won't be matched against the wrong type.
*
*/
#define SENT_IP4 0x0001 /* data is two struct in_addr */
#define SENT_IP6 0x0002
#define SENT_LEN sizeof(struct sockaddr_encap)
struct ipsec_id {
u_int16_t type; /* Subtype of data */
int16_t len; /* Length of data following */
};
struct ipsec_ids {
LIST_ENTRY(ipsec_ids) id_gc_list; /* [F] */
RBT_ENTRY(ipsec_ids) id_node_id; /* [F] */
RBT_ENTRY(ipsec_ids) id_node_flow; /* [F] */
struct ipsec_id *id_local; /* [I] */
struct ipsec_id *id_remote; /* [I] */
u_int32_t id_flow; /* [I] */
u_int id_refcount; /* [F] */
u_int id_gc_ttl; /* [F] */
};
RBT_HEAD(ipsec_ids_flows, ipsec_ids);
RBT_HEAD(ipsec_ids_tree, ipsec_ids);
struct ipsec_acquire {
union sockaddr_union ipa_addr;
u_int32_t ipa_seq;
struct sockaddr_encap ipa_info;
struct sockaddr_encap ipa_mask;
struct refcnt ipa_refcnt;
struct timeout ipa_timeout;
struct ipsec_policy *ipa_policy; /* [A] back pointer */
TAILQ_ENTRY(ipsec_acquire) ipa_ipo_next; /* [A] per policy */
TAILQ_ENTRY(ipsec_acquire) ipa_next; /* [A] global list */
};
TAILQ_HEAD(ipsec_acquire_head, ipsec_acquire);
struct ipsec_policy {
struct radix_node ipo_nodes[2]; /* radix tree glue */
struct sockaddr_encap ipo_addr;
struct sockaddr_encap ipo_mask;
union sockaddr_union ipo_src; /* Local address to use */
union sockaddr_union ipo_dst; /* Remote gateway -- if it's zeroed:
* - on output, we try to
* contact the remote host
* directly (if needed).
* - on input, we accept on if
* the inner source is the
* same as the outer source
* address, or if transport
* mode was used.
*/
u_int64_t ipo_last_searched; /* [P] Timestamp of lookup */
u_int8_t ipo_flags; /* See IPSP_POLICY_* definitions */
u_int8_t ipo_type; /* USE/ACQUIRE/... */
u_int8_t ipo_sproto; /* ESP/AH; if zero, use system dflts */
u_int ipo_rdomain;
struct refcnt ipo_refcnt;
struct tdb *ipo_tdb; /* [P] Cached TDB entry */
struct ipsec_ids *ipo_ids;
struct ipsec_acquire_head ipo_acquires; /* [A] List of acquires */
TAILQ_ENTRY(ipsec_policy) ipo_tdb_next; /* [P] List TDB policies */
TAILQ_ENTRY(ipsec_policy) ipo_list; /* List of all policies */
};
#define IPSP_POLICY_NONE 0x0000 /* No flags set */
#define IPSP_POLICY_STATIC 0x0002 /* Static policy */
#define IPSP_IPSEC_USE 0 /* Use if existing, don't acquire */
#define IPSP_IPSEC_ACQUIRE 1 /* Try acquire, let packet through */
#define IPSP_IPSEC_REQUIRE 2 /* Require SA */
#define IPSP_PERMIT 3 /* Permit traffic through */
#define IPSP_DENY 4 /* Deny traffic */
#define IPSP_IPSEC_DONTACQ 5 /* Require, but don't acquire */
/* Identity types */
#define IPSP_IDENTITY_NONE 0
#define IPSP_IDENTITY_PREFIX 1
#define IPSP_IDENTITY_FQDN 2
#define IPSP_IDENTITY_USERFQDN 3
#define IPSP_IDENTITY_ASN1_DN 4
struct tdb { /* tunnel descriptor block */
/*
* Each TDB is on three hash tables: one keyed on dst/spi/sproto,
* one keyed on dst/sproto, and one keyed on src/sproto. The first
* is used for finding a specific TDB, the second for finding TDBs
* for outgoing policy matching, and the third for incoming
* policy matching. The following three fields maintain the hash
* queues in those three tables.
*/
struct tdb *tdb_hnext; /* [D] dst/spi/sproto table */
struct tdb *tdb_dnext; /* [D] dst/sproto table */
struct tdb *tdb_snext; /* [D] src/sproto table */
struct tdb *tdb_inext;
struct tdb *tdb_onext;
SIMPLEQ_ENTRY(tdb) tdb_walk; /* [N] temp list for tdb walker */
struct refcnt tdb_refcnt;
struct mutex tdb_mtx;
const struct xformsw *tdb_xform; /* Transform to use */
const struct enc_xform *tdb_encalgxform; /* Enc algorithm */
const struct auth_hash *tdb_authalgxform; /* Auth algorithm */
const struct comp_algo *tdb_compalgxform; /* Compression algo */
#define TDBF_UNIQUE 0x00001 /* This should not be used by others */
#define TDBF_TIMER 0x00002 /* Absolute expiration timer in use */
#define TDBF_BYTES 0x00004 /* Check the byte counters */
#define TDBF_ALLOCATIONS 0x00008 /* Check the flows counters */
#define TDBF_INVALID 0x00010 /* This SPI is not valid yet/anymore */
#define TDBF_FIRSTUSE 0x00020 /* Expire after first use */
#define TDBF_DELETED 0x00040 /* This TDB has already been deleted */
#define TDBF_SOFT_TIMER 0x00080 /* Soft expiration */
#define TDBF_SOFT_BYTES 0x00100 /* Soft expiration */
#define TDBF_SOFT_ALLOCATIONS 0x00200 /* Soft expiration */
#define TDBF_SOFT_FIRSTUSE 0x00400 /* Soft expiration */
#define TDBF_PFS 0x00800 /* Ask for PFS from Key Mgmt. */
#define TDBF_TUNNELING 0x01000 /* Force IP-IP encapsulation */
#define TDBF_USEDTUNNEL 0x10000 /* Appended a tunnel header in past */
#define TDBF_UDPENCAP 0x20000 /* UDP encapsulation */
#define TDBF_PFSYNC 0x40000 /* TDB will be synced */
#define TDBF_PFSYNC_RPL 0x80000 /* Replay counter should be bumped */
#define TDBF_ESN 0x100000 /* 64-bit sequence numbers (ESN) */
#define TDBF_PFSYNC_SNAPPED 0x200000 /* entry is being dispatched to peer */
#define TDBF_IFACE 0x400000 /* entry policy is via sec(4) */
#define TDBF_BITS ("\20" \
"\1UNIQUE\2TIMER\3BYTES\4ALLOCATIONS" \
"\5INVALID\6FIRSTUSE\7DELETED\10SOFT_TIMER" \
"\11SOFT_BYTES\12SOFT_ALLOCATIONS\13SOFT_FIRSTUSE\14PFS" \
"\15TUNNELING" \
"\21USEDTUNNEL\22UDPENCAP\23PFSYNC\24PFSYNC_RPL" \
"\25ESN" "\26IFACE")
u_int32_t tdb_flags; /* [m] Flags related to this TDB */
struct timeout tdb_timer_tmo;
struct timeout tdb_first_tmo;
struct timeout tdb_stimer_tmo;
struct timeout tdb_sfirst_tmo;
u_int32_t tdb_seq; /* Tracking number for PFKEY */
u_int32_t tdb_exp_allocations; /* Expire after so many flows */
u_int32_t tdb_soft_allocations; /* Expiration warning */
u_int32_t tdb_cur_allocations; /* Total number of allocs */
u_int64_t tdb_exp_bytes; /* Expire after so many bytes passed */
u_int64_t tdb_soft_bytes; /* Expiration warning */
u_int64_t tdb_cur_bytes; /* Current count of bytes */
u_int64_t tdb_exp_timeout; /* When does the SPI expire */
u_int64_t tdb_soft_timeout; /* Send soft-expire warning */
u_int64_t tdb_established; /* When was SPI established */
u_int64_t tdb_first_use; /* When was it first used */
u_int64_t tdb_soft_first_use; /* Soft warning */
u_int64_t tdb_exp_first_use; /* Expire if tdb_first_use +
* tdb_exp_first_use <= curtime
*/
u_int64_t tdb_last_used; /* When was this SA last used */
u_int64_t tdb_last_marked;/* Last SKIPCRYPTO status change */
struct cpumem *tdb_counters; /* stats about this TDB */
u_int64_t tdb_cryptoid; /* Crypto session ID */
u_int32_t tdb_spi; /* [I] SPI */
u_int16_t tdb_amxkeylen; /* Raw authentication key length */
u_int16_t tdb_emxkeylen; /* Raw encryption key length */
u_int16_t tdb_ivlen; /* IV length */
u_int8_t tdb_sproto; /* [I] IPsec protocol */
u_int8_t tdb_wnd; /* Replay window */
u_int8_t tdb_satype; /* SA type (RFC2367, PF_KEY) */
u_int8_t tdb_iface_dir; /* [I] sec(4) iface direction */
union sockaddr_union tdb_dst; /* [N] Destination address */
union sockaddr_union tdb_src; /* [N] Source address */
u_int8_t *tdb_amxkey; /* Raw authentication key */
u_int8_t *tdb_emxkey; /* Raw encryption key */
#define TDB_REPLAYWASTE 32
#define TDB_REPLAYMAX (2100+TDB_REPLAYWASTE)
u_int64_t tdb_rpl; /* Replay counter */
u_int32_t tdb_seen[howmany(TDB_REPLAYMAX, 32)]; /* Anti-replay window */
u_int8_t tdb_iv[4]; /* Used for HALF-IV ESP */
struct ipsec_ids *tdb_ids; /* Src/Dst ID for this SA */
int tdb_ids_swapped; /* XXX */
u_int32_t tdb_mtu; /* MTU at this point in the chain */
u_int64_t tdb_mtutimeout; /* When to ignore this entry */
u_int16_t tdb_udpencap_port; /* Peer UDP port */
u_int16_t tdb_tag; /* Packet filter tag */
u_int32_t tdb_tap; /* Alternate enc(4) interface */
unsigned int tdb_iface; /* [I] sec(4) iface */
u_int tdb_rdomain; /* [I] Routing domain */
u_int tdb_rdomain_post; /* [I] Change domain */
struct sockaddr_encap tdb_filter; /* What traffic is acceptable */
struct sockaddr_encap tdb_filtermask; /* And the mask */
TAILQ_HEAD(tdb_policy_head, ipsec_policy) tdb_policy_head; /* [P] */
TAILQ_ENTRY(tdb) tdb_sync_entry; /* [S] pfsync tdb queue */
u_int32_t tdb_updates; /* [S] pfsync update counter */
};
enum tdb_counters {
tdb_ipackets, /* Input IPsec packets */
tdb_opackets, /* Output IPsec packets */
tdb_ibytes, /* Input bytes */
tdb_obytes, /* Output bytes */
tdb_idrops, /* Dropped on input */
tdb_odrops, /* Dropped on output */
tdb_idecompbytes, /* Input bytes, decompressed */
tdb_ouncompbytes, /* Output bytes, uncompressed */
tdb_ncounters
};
static inline void
tdbstat_inc(struct tdb *tdb, enum tdb_counters c)
{
counters_inc(tdb->tdb_counters, c);
}
static inline void
tdbstat_add(struct tdb *tdb, enum tdb_counters c, uint64_t v)
{
counters_add(tdb->tdb_counters, c, v);
}
static inline void
tdbstat_pkt(struct tdb *tdb, enum tdb_counters pc, enum tdb_counters bc,
uint64_t bytes)
{
counters_pkt(tdb->tdb_counters, pc, bc, bytes);
}
struct tdb_ident {
u_int32_t spi;
union sockaddr_union dst;
u_int8_t proto;
u_int rdomain;
};
struct tdb_crypto {
union sockaddr_union tc_dst;
u_int64_t tc_rpl;
u_int32_t tc_spi;
int tc_protoff;
int tc_skip;
u_int tc_rdomain;
u_int8_t tc_proto;
};
struct ipsecinit {
u_int8_t *ii_enckey;
u_int8_t *ii_authkey;
u_int16_t ii_enckeylen;
u_int16_t ii_authkeylen;
u_int8_t ii_encalg;
u_int8_t ii_authalg;
u_int8_t ii_compalg;
};
/* xform IDs */
#define XF_IP4 1 /* IP inside IP */
#define XF_AH 2 /* AH */
#define XF_ESP 3 /* ESP */
#define XF_TCPSIGNATURE 5 /* TCP MD5 Signature option, RFC 2358 */
#define XF_IPCOMP 6 /* IPCOMP */
/* xform attributes */
#define XFT_AUTH 0x0001
#define XFT_CONF 0x0100
#define XFT_COMP 0x1000
#define IPSEC_ZEROES_SIZE 256 /* Larger than an IP6 extension hdr. */
struct xformsw {
u_short xf_type; /* Unique ID of xform */
u_short xf_flags; /* flags (see below) */
char *xf_name; /* human-readable name */
int (*xf_attach)(void); /* called at config time */
int (*xf_init)(struct tdb *, const struct xformsw *,
struct ipsecinit *);
int (*xf_zeroize)(struct tdb *); /* termination */
int (*xf_input)(struct mbuf **, struct tdb *, int, int);
int (*xf_output)(struct mbuf *, struct tdb *, int, int);
};
extern int ipsec_in_use;
extern u_int64_t ipsec_last_added;
extern int encdebug; /* enable message reporting */
extern struct pool tdb_pool;
extern int ipsec_keep_invalid; /* lifetime of embryonic SAs (in sec) */
extern int ipsec_require_pfs; /* use Perfect Forward Secrecy */
extern int ipsec_expire_acquire; /* wait for security assoc. (in sec) */
extern int ipsec_soft_allocations; /* flows/SA before renegotiation */
extern int ipsec_exp_allocations; /* num. of flows/SA before it expires */
extern int ipsec_soft_bytes; /* bytes/SA before renegotiation */
extern int ipsec_exp_bytes; /* num of bytes/SA before it expires */
extern int ipsec_soft_timeout; /* seconds/SA before renegotiation */
extern int ipsec_exp_timeout; /* seconds/SA before it expires */
extern int ipsec_soft_first_use; /* seconds between 1st asso & renego */
extern int ipsec_exp_first_use; /* seconds between 1st asso & expire */
/*
* Names for IPsec sysctl objects
*/
#define IPSEC_ENCDEBUG IPCTL_ENCDEBUG /* 12 */
#define IPSEC_STATS IPCTL_IPSEC_STATS /* 13 */
#define IPSEC_EXPIRE_ACQUIRE IPCTL_IPSEC_EXPIRE_ACQUIRE /* 14 */
#define IPSEC_EMBRYONIC_SA_TIMEOUT IPCTL_IPSEC_EMBRYONIC_SA_TIMEOUT/* 15 */
#define IPSEC_REQUIRE_PFS IPCTL_IPSEC_REQUIRE_PFS /* 16 */
#define IPSEC_SOFT_ALLOCATIONS IPCTL_IPSEC_SOFT_ALLOCATIONS /* 17 */
#define IPSEC_ALLOCATIONS IPCTL_IPSEC_ALLOCATIONS /* 18 */
#define IPSEC_SOFT_BYTES IPCTL_IPSEC_SOFT_BYTES /* 19 */
#define IPSEC_BYTES IPCTL_IPSEC_BYTES /* 20 */
#define IPSEC_TIMEOUT IPCTL_IPSEC_TIMEOUT /* 21 */
#define IPSEC_SOFT_TIMEOUT IPCTL_IPSEC_SOFT_TIMEOUT /* 22 */
#define IPSEC_SOFT_FIRSTUSE IPCTL_IPSEC_SOFT_FIRSTUSE /* 23 */
#define IPSEC_FIRSTUSE IPCTL_IPSEC_FIRSTUSE /* 24 */
#define IPSEC_MAXID 25
extern char ipsec_def_enc[];
extern char ipsec_def_auth[];
extern char ipsec_def_comp[];
extern TAILQ_HEAD(ipsec_policy_head, ipsec_policy) ipsec_policy_head;
extern struct mutex tdb_sadb_mtx;
extern struct mutex ipo_tdb_mtx;
struct cryptop;
/* Misc. */
const char *ipsp_address(union sockaddr_union *, char *, socklen_t);
/* SPD tables */
struct radix_node_head *spd_table_add(unsigned int);
struct radix_node_head *spd_table_get(unsigned int);
int spd_table_walk(unsigned int,
int (*walker)(struct ipsec_policy *, void *, unsigned int), void *);
/* TDB management routines */
uint32_t reserve_spi(u_int, u_int32_t, u_int32_t, union sockaddr_union *,
union sockaddr_union *, u_int8_t, int *);
struct tdb *gettdb_dir(u_int, u_int32_t, union sockaddr_union *, u_int8_t, int);
#define gettdb(a,b,c,d) gettdb_dir((a),(b),(c),(d),0)
#define gettdb_rev(a,b,c,d) gettdb_dir((a),(b),(c),(d),1)
struct tdb *gettdbbydst(u_int, union sockaddr_union *, u_int8_t,
struct ipsec_ids *,
struct sockaddr_encap *, struct sockaddr_encap *);
struct tdb *gettdbbysrc(u_int, union sockaddr_union *, u_int8_t,
struct ipsec_ids *,
struct sockaddr_encap *, struct sockaddr_encap *);
struct tdb *gettdbbysrcdst_dir(u_int, u_int32_t, union sockaddr_union *,
union sockaddr_union *, u_int8_t, int);
#define gettdbbysrcdst(a,b,c,d,e) gettdbbysrcdst_dir((a),(b),(c),(d),(e),0)
#define gettdbbysrcdst_rev(a,b,c,d,e) gettdbbysrcdst_dir((a),(b),(c),(d),(e),1)
void puttdb(struct tdb *);
void puttdb_locked(struct tdb *);
void tdb_delete(struct tdb *);
struct tdb *tdb_alloc(u_int);
struct tdb *tdb_ref(struct tdb *);
void tdb_unref(struct tdb *);
void tdb_free(struct tdb *);
int tdb_init(struct tdb *, u_int16_t, struct ipsecinit *);
void tdb_unlink(struct tdb *);
void tdb_unlink_locked(struct tdb *);
void tdb_cleanspd(struct tdb *);
void tdb_unbundle(struct tdb *);
void tdb_addtimeouts(struct tdb *);
void tdb_deltimeouts(struct tdb *);
int tdb_walk(u_int, int (*)(struct tdb *, void *, int), void *);
void tdb_printit(void *, int, int (*)(const char *, ...));
/* XF_IP4 */
int ipe4_attach(void);
int ipe4_init(struct tdb *, const struct xformsw *, struct ipsecinit *);
int ipe4_zeroize(struct tdb *);
int ipe4_input(struct mbuf **, struct tdb *, int, int);
/* XF_AH */
int ah_attach(void);
int ah_init(struct tdb *, const struct xformsw *, struct ipsecinit *);
int ah_zeroize(struct tdb *);
int ah_input(struct mbuf **, struct tdb *, int, int);
int ah_output(struct mbuf *, struct tdb *, int, int);
int ah_sysctl(int *, u_int, void *, size_t *, void *, size_t);
int ah46_input(struct mbuf **, int *, int, int);
void ah4_ctlinput(int, struct sockaddr *, u_int, void *);
void udpencap_ctlinput(int, struct sockaddr *, u_int, void *);
/* XF_ESP */
int esp_attach(void);
int esp_init(struct tdb *, const struct xformsw *, struct ipsecinit *);
int esp_zeroize(struct tdb *);
int esp_input(struct mbuf **, struct tdb *, int, int);
int esp_output(struct mbuf *, struct tdb *, int, int);
int esp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
int esp46_input(struct mbuf **, int *, int, int);
void esp4_ctlinput(int, struct sockaddr *, u_int, void *);
/* XF_IPCOMP */
int ipcomp_attach(void);
int ipcomp_init(struct tdb *, const struct xformsw *, struct ipsecinit *);
int ipcomp_zeroize(struct tdb *);
int ipcomp_input(struct mbuf **, struct tdb *, int, int);
int ipcomp_output(struct mbuf *, struct tdb *, int, int);
int ipcomp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
int ipcomp46_input(struct mbuf **, int *, int, int);
/* XF_TCPSIGNATURE */
int tcp_signature_tdb_attach(void);
int tcp_signature_tdb_init(struct tdb *, const struct xformsw *,
struct ipsecinit *);
int tcp_signature_tdb_zeroize(struct tdb *);
int tcp_signature_tdb_input(struct mbuf **, struct tdb *, int, int);
int tcp_signature_tdb_output(struct mbuf *, struct tdb *, int, int);
/* Replay window */
int checkreplaywindow(struct tdb *, u_int64_t, u_int32_t, u_int32_t *, int);
/* Packet processing */
int ipsp_process_packet(struct mbuf *, struct tdb *, int, int);
int ipsp_process_done(struct mbuf *, struct tdb *);
int ipsp_spd_lookup(struct mbuf *, int, int, int, struct tdb *,
const struct ipsec_level *, struct tdb **, struct ipsec_ids *);
int ipsp_is_unspecified(union sockaddr_union);
int ipsp_aux_match(struct tdb *, struct ipsec_ids *,
struct sockaddr_encap *, struct sockaddr_encap *);
int ipsp_ids_match(struct ipsec_ids *, struct ipsec_ids *);
struct ipsec_ids *ipsp_ids_insert(struct ipsec_ids *);
struct ipsec_ids *ipsp_ids_lookup(u_int32_t);
void ipsp_ids_free(struct ipsec_ids *);
void ipsp_init(void);
void ipsec_init(void);
int ipsec_sysctl(int *, u_int, void *, size_t *, void *, size_t);
int ipsec_common_input(struct mbuf **, int, int, int, int, int);
int ipsec_common_input_cb(struct mbuf **, struct tdb *, int, int);
int ipsec_input_disabled(struct mbuf **, int *, int, int);
int ipsec_protoff(struct mbuf *, int, int);
int ipsec_delete_policy(struct ipsec_policy *);
ssize_t ipsec_hdrsz(struct tdb *);
void ipsec_adjust_mtu(struct mbuf *, u_int32_t);
void ipsec_set_mtu(struct tdb *, u_int32_t);
struct ipsec_acquire *ipsec_get_acquire(u_int32_t);
void ipsec_unref_acquire(struct ipsec_acquire *);
int ipsec_forward_check(struct mbuf *, int, int);
int ipsec_local_check(struct mbuf *, int, int, int);
#endif /* _KERNEL */
#endif /* _NETINET_IPSP_H_ */
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