NetBSD/sys/netipsec/ipsec.h

374 lines
11 KiB
C

/* $NetBSD: ipsec.h,v 1.24 2009/05/10 02:13:07 elad Exp $ */
/* $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/sys/netipsec/ipsec.h,v 1.2.4.2 2004/02/14 22:23:23 bms Exp $ */
/* $KAME: ipsec.h,v 1.53 2001/11/20 08:32:38 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* IPsec controller part.
*/
#ifndef _NETIPSEC_IPSEC_H_
#define _NETIPSEC_IPSEC_H_
#if defined(_KERNEL_OPT)
#include "opt_inet.h"
#include "opt_ipsec.h"
#endif
#include <net/pfkeyv2.h>
#include <netipsec/ipsec_osdep.h>
#include <netipsec/keydb.h>
#ifdef _KERNEL
/*
* Security Policy Index
* Ensure that both address families in the "src" and "dst" are same.
* When the value of the ul_proto is ICMPv6, the port field in "src"
* specifies ICMPv6 type, and the port field in "dst" specifies ICMPv6 code.
*/
struct secpolicyindex {
u_int8_t dir; /* direction of packet flow, see blow */
union sockaddr_union src; /* IP src address for SP */
union sockaddr_union dst; /* IP dst address for SP */
u_int8_t prefs; /* prefix length in bits for src */
u_int8_t prefd; /* prefix length in bits for dst */
u_int16_t ul_proto; /* upper layer Protocol */
#ifdef notyet
uid_t uids;
uid_t uidd;
gid_t gids;
gid_t gidd;
#endif
};
/* Security Policy Data Base */
struct secpolicy {
LIST_ENTRY(secpolicy) chain;
u_int refcnt; /* reference count */
struct secpolicyindex spidx; /* selector */
u_int32_t id; /* It's unique number on the system. */
u_int state; /* 0: dead, others: alive */
#define IPSEC_SPSTATE_DEAD 0
#define IPSEC_SPSTATE_ALIVE 1
u_int policy; /* DISCARD, NONE or IPSEC, see keyv2.h */
struct ipsecrequest *req;
/* pointer to the ipsec request tree, */
/* if policy == IPSEC else this value == NULL.*/
/*
* lifetime handler.
* the policy can be used without limitiation if both lifetime and
* validtime are zero.
* "lifetime" is passed by sadb_lifetime.sadb_lifetime_addtime.
* "validtime" is passed by sadb_lifetime.sadb_lifetime_usetime.
*/
long created; /* time created the policy */
long lastused; /* updated every when kernel sends a packet */
long lifetime; /* duration of the lifetime of this policy */
long validtime; /* duration this policy is valid without use */
};
/* Request for IPsec */
struct ipsecrequest {
struct ipsecrequest *next;
/* pointer to next structure */
/* If NULL, it means the end of chain. */
struct secasindex saidx;/* hint for search proper SA */
/* if __ss_len == 0 then no address specified.*/
u_int level; /* IPsec level defined below. */
struct secasvar *sav; /* place holder of SA for use */
struct secpolicy *sp; /* back pointer to SP */
};
/* security policy in PCB */
struct inpcbpolicy {
struct secpolicy *sp_in;
struct secpolicy *sp_out;
int priv; /* privileged socket ? */
#ifdef __NetBSD__
/* cached policy */
struct {
struct secpolicy *cachesp;
struct secpolicyindex cacheidx;
int cachehint; /* processing requirement hint: */
#define IPSEC_PCBHINT_MAYBE 0 /* IPsec processing maybe required */
#define IPSEC_PCBHINT_YES 1 /* IPsec processing is required */
#define IPSEC_PCBHINT_NO 2 /* IPsec processing not required */
u_int cachegen; /* spdgen when cache filled */
} sp_cache[3]; /* XXX 3 == IPSEC_DIR_MAX */
int sp_cacheflags;
#define IPSEC_PCBSP_CONNECTED 1
#endif /* __NetBSD__ */
};
#ifdef __NetBSD__
#define IPSEC_PCB_SKIP_IPSEC(inpp, dir) \
((inpp)->sp_cache[(dir)].cachehint == IPSEC_PCBHINT_NO && \
(inpp)->sp_cache[(dir)].cachegen == ipsec_spdgen)
#endif /* __NetBSD__ */
/* SP acquiring list table. */
struct secspacq {
LIST_ENTRY(secspacq) chain;
struct secpolicyindex spidx;
long created; /* for lifetime */
int count; /* for lifetime */
/* XXX: here is mbuf place holder to be sent ? */
};
#endif /* _KERNEL */
/* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */
#define IPSEC_PORT_ANY 0
#define IPSEC_ULPROTO_ANY 255
#define IPSEC_PROTO_ANY 255
/* mode of security protocol */
/* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */
#define IPSEC_MODE_ANY 0 /* i.e. wildcard. */
#define IPSEC_MODE_TRANSPORT 1
#define IPSEC_MODE_TUNNEL 2
#define IPSEC_MODE_TCPMD5 3 /* TCP MD5 mode */
/*
* Direction of security policy.
* NOTE: Since INVALID is used just as flag.
* The other are used for loop counter too.
*/
#define IPSEC_DIR_ANY 0
#define IPSEC_DIR_INBOUND 1
#define IPSEC_DIR_OUTBOUND 2
#define IPSEC_DIR_MAX 3
#define IPSEC_DIR_INVALID 4
/* Policy level */
/*
* IPSEC, ENTRUST and BYPASS are allowed for setsockopt() in PCB,
* DISCARD, IPSEC and NONE are allowed for setkey() in SPD.
* DISCARD and NONE are allowed for system default.
*/
#define IPSEC_POLICY_DISCARD 0 /* discarding packet */
#define IPSEC_POLICY_NONE 1 /* through IPsec engine */
#define IPSEC_POLICY_IPSEC 2 /* do IPsec */
#define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */
#define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */
/* Security protocol level */
#define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */
#define IPSEC_LEVEL_USE 1 /* use SA if present. */
#define IPSEC_LEVEL_REQUIRE 2 /* require SA. */
#define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */
#define IPSEC_MANUAL_REQID_MAX 0x3fff
/*
* if security policy level == unique, this id
* indicate to a relative SA for use, else is
* zero.
* 1 - 0x3fff are reserved for manual keying.
* 0 are reserved for above reason. Others is
* for kernel use.
* Note that this id doesn't identify SA
* by only itself.
*/
#define IPSEC_REPLAYWSIZE 32
#ifdef _KERNEL
struct ipsec_output_state {
struct mbuf *m;
struct route *ro;
struct sockaddr *dst;
};
struct ipsec_history {
int ih_proto;
u_int32_t ih_spi;
};
extern int ipsec_debug;
#ifdef IPSEC_DEBUG
extern int ipsec_replay;
extern int ipsec_integrity;
#endif
extern struct secpolicy ip4_def_policy;
extern int ip4_esp_trans_deflev;
extern int ip4_esp_net_deflev;
extern int ip4_ah_trans_deflev;
extern int ip4_ah_net_deflev;
extern int ip4_ah_cleartos;
extern int ip4_ah_offsetmask;
extern int ip4_ipsec_dfbit;
extern int ip4_ipsec_ecn;
extern int ip4_esp_randpad;
extern int crypto_support;
#define ipseclog(x) do { if (ipsec_debug) log x; } while (0)
/* for openbsd compatibility */
#define DPRINTF(x) do { if (ipsec_debug) printf x; } while (0)
#ifdef __NetBSD__
void ipsec_pcbconn (struct inpcbpolicy *);
void ipsec_pcbdisconn (struct inpcbpolicy *);
void ipsec_invalpcbcacheall (void);
extern u_int ipsec_spdgen;
#endif /* __NetBSD__ */
struct tdb_ident;
struct secpolicy *ipsec_getpolicy (struct tdb_ident*, u_int);
struct inpcb;
struct secpolicy *ipsec4_checkpolicy (struct mbuf *, u_int, u_int,
int *, struct inpcb *);
struct secpolicy * ipsec_getpolicybyaddr(struct mbuf *, u_int,
int, int *);
static __inline struct secpolicy*
ipsec4_getpolicybysock(
struct mbuf *m,
u_int dir,
const struct socket *so,
int *err
)
{
panic("ipsec4_getpolicybysock");
}
static __inline int
ipsec_copy_pcbpolicy(
struct inpcbpolicy *old,
struct inpcbpolicy *new
)
{
/*XXX do nothing */
return (0);
}
struct inpcb;
#define ipsec_init_pcbpolicy ipsec_init_policy
int ipsec_init_policy (struct socket *so, struct inpcbpolicy **);
int ipsec_copy_policy
(struct inpcbpolicy *, struct inpcbpolicy *);
u_int ipsec_get_reqlevel (struct ipsecrequest *);
int ipsec_in_reject (struct secpolicy *, struct mbuf *);
int ipsec4_set_policy (struct inpcb *, int, void *, size_t, kauth_cred_t);
int ipsec4_get_policy (struct inpcb *, void *, size_t, struct mbuf **);
int ipsec4_delete_pcbpolicy (struct inpcb *);
int ipsec4_in_reject (struct mbuf *, struct inpcb *);
/*
* KAME ipsec4_in_reject_so(struct mbuf*, struct so) compatibility shim
*/
#define ipsec4_in_reject_so(m, _so) \
ipsec4_in_reject(m, ((_so) == NULL? NULL : sotoinpcb(_so)))
struct secas;
struct tcpcb;
int ipsec_chkreplay (u_int32_t, struct secasvar *);
int ipsec_updatereplay (u_int32_t, struct secasvar *);
size_t ipsec4_hdrsiz (struct mbuf *, u_int, struct inpcb *);
#ifdef __FreeBSD__
size_t ipsec_hdrsiz_tcp (struct tcpcb *);
#else
size_t ipsec4_hdrsiz_tcp (struct tcpcb *);
#define ipsec4_getpolicybyaddr ipsec_getpolicybyaddr
#endif
union sockaddr_union;
const char *ipsec_address(union sockaddr_union* sa);
const char *ipsec_logsastr (struct secasvar *);
void ipsec_dumpmbuf (struct mbuf *);
/* NetBSD protosw ctlin entrypoint */
void *esp4_ctlinput(int, const struct sockaddr *, void *);
void *ah4_ctlinput(int, const struct sockaddr *, void *);
struct m_tag;
void ipsec4_common_input(struct mbuf *m, ...);
int ipsec4_common_input_cb(struct mbuf *, struct secasvar *,
int, int, struct m_tag *);
int ipsec4_process_packet (struct mbuf *, struct ipsecrequest *,
int, int);
int ipsec_process_done (struct mbuf *, struct ipsecrequest *);
#define ipsec_indone(m) \
(m_tag_find((m), PACKET_TAG_IPSEC_IN_DONE, NULL) != NULL)
#define ipsec_outdone(m) \
(m_tag_find((m), PACKET_TAG_IPSEC_OUT_DONE, NULL) != NULL)
struct mbuf *ipsec_copypkt (struct mbuf *);
void m_checkalignment(const char* , struct mbuf *, int, int);
struct mbuf *m_clone(struct mbuf *);
struct mbuf *m_makespace(struct mbuf *, int, int, int *);
void *m_pad(struct mbuf *, int );
int m_striphdr(struct mbuf *, int, int);
/* Per-socket caching of IPsec output policy */
static __inline
int ipsec_clear_socket_cache(struct mbuf *m)
{
return 0;
}
#endif /* _KERNEL */
#ifndef _KERNEL
void *ipsec_set_policy (char *, int);
int ipsec_get_policylen (void *);
char *ipsec_dump_policy (void *, char *);
const char *ipsec_strerror (void);
#endif /* !_KERNEL */
#ifdef _KERNEL
/* External declarations of per-file init functions */
INITFN void ah_attach(void);
INITFN void esp_attach(void);
INITFN void ipcomp_attach(void);
INITFN void ipe4_attach(void);
INITFN void ipe4_attach(void);
INITFN void tcpsignature_attach(void);
INITFN void ipsec_attach(void);
#endif /* _KERNEL */
#endif /* !_NETIPSEC_IPSEC_H_ */