[apple/xnu.git] / bsd / netinet6 / ipsec.h

/*	$KAME: ipsec.h,v 1.28 2000/03/15 13:07:57 sakane 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 _NETINET6_IPSEC_H_
#define _NETINET6_IPSEC_H_

#include <net/pfkeyv2.h>
#include <netkey/keydb.h>

#if KERNEL
/*
 * Security Policy Index
 * NOTE: Encure to be same address family and upper layer protocol.
 * NOTE: ul_proto, port number, uid, gid:
 *	ANY: reserved for waldcard.
 *	0 to (~0 - 1): is one of the number of each value.
 */
struct secpolicyindex {
	u_int8_t dir;			/* direction of packet flow, see blow */
	struct sockaddr_storage src;	/* IP src address for SP */
	struct sockaddr_storage 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;

	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.*/
};

/* 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 ? */
};

/* SP acquiring list table. */
struct secspacq {
	LIST_ENTRY(secspacq) chain;

	struct secpolicyindex spidx;

	u_int32_t tick;		/* 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

/*
 * 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 allowd for setsockopt() in PCB,
 * DISCARD, IPSEC and NONE are allowd for setkey() in SPD.
 * DISCARD and NONE are allowd 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

/* statistics for ipsec processing */
struct ipsecstat {
	u_quad_t in_success;  /* succeeded inbound process */
	u_quad_t in_polvio;
			/* security policy violation for inbound process */
	u_quad_t in_nosa;     /* inbound SA is unavailable */
	u_quad_t in_inval;    /* inbound processing failed due to EINVAL */
	u_quad_t in_nomem;    /* inbound processing failed due to ENOBUFS */
	u_quad_t in_badspi;   /* failed getting a SPI */
	u_quad_t in_ahreplay; /* AH replay check failed */
	u_quad_t in_espreplay; /* ESP replay check failed */
	u_quad_t in_ahauthsucc; /* AH authentication success */
	u_quad_t in_ahauthfail; /* AH authentication failure */
	u_quad_t in_espauthsucc; /* ESP authentication success */
	u_quad_t in_espauthfail; /* ESP authentication failure */
	u_quad_t in_esphist[256];
	u_quad_t in_ahhist[256];
	u_quad_t in_comphist[256];
	u_quad_t out_success; /* succeeded outbound process */
	u_quad_t out_polvio;
			/* security policy violation for outbound process */
	u_quad_t out_nosa;    /* outbound SA is unavailable */
	u_quad_t out_inval;   /* outbound process failed due to EINVAL */
	u_quad_t out_nomem;    /* inbound processing failed due to ENOBUFS */
	u_quad_t out_noroute; /* there is no route */
	u_quad_t out_esphist[256];
	u_quad_t out_ahhist[256];
	u_quad_t out_comphist[256];
};

/*
 * Definitions for IPsec & Key sysctl operations.
 */
/*
 * Names for IPsec & Key sysctl objects
 */
#define IPSECCTL_STATS			1	/* stats */
#define IPSECCTL_DEF_POLICY		2
#define IPSECCTL_DEF_ESP_TRANSLEV	3	/* int; ESP transport mode */
#define IPSECCTL_DEF_ESP_NETLEV		4	/* int; ESP tunnel mode */
#define IPSECCTL_DEF_AH_TRANSLEV	5	/* int; AH transport mode */
#define IPSECCTL_DEF_AH_NETLEV		6	/* int; AH tunnel mode */
#define IPSECCTL_INBOUND_CALL_IKE	7
#define	IPSECCTL_AH_CLEARTOS		8
#define	IPSECCTL_AH_OFFSETMASK		9
#define	IPSECCTL_DFBIT			10
#define	IPSECCTL_ECN			11
#define	IPSECCTL_DEBUG			12
#define IPSECCTL_MAXID			13

#define IPSECCTL_NAMES { \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ "def_policy", CTLTYPE_INT }, \
	{ "esp_trans_deflev", CTLTYPE_INT }, \
	{ "esp_net_deflev", CTLTYPE_INT }, \
	{ "ah_trans_deflev", CTLTYPE_INT }, \
	{ "ah_net_deflev", CTLTYPE_INT }, \
	{ "inbound_call_ike", CTLTYPE_INT }, \
	{ "ah_cleartos", CTLTYPE_INT }, \
	{ "ah_offsetmask", CTLTYPE_INT }, \
	{ "dfbit", CTLTYPE_INT }, \
	{ "ecn", CTLTYPE_INT }, \
	{ "debug", CTLTYPE_INT }, \
}

#define IPSEC6CTL_NAMES { \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ "def_policy", CTLTYPE_INT }, \
	{ "esp_trans_deflev", CTLTYPE_INT }, \
	{ "esp_net_deflev", CTLTYPE_INT }, \
	{ "ah_trans_deflev", CTLTYPE_INT }, \
	{ "ah_net_deflev", CTLTYPE_INT }, \
	{ "inbound_call_ike", CTLTYPE_INT }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ 0, 0 }, \
	{ "ecn", CTLTYPE_INT }, \
	{ "debug", CTLTYPE_INT }, \
}

#ifdef __bsdi__
#define IPSECCTL_VARS { \
	0, \
	0, \
	&ip4_def_policy.policy, \
	&ip4_esp_trans_deflev, \
	&ip4_esp_net_deflev, \
	&ip4_ah_trans_deflev, \
	&ip4_ah_net_deflev, \
	&ip4_inbound_call_ike, \
	&ip4_ah_cleartos, \
	&ip4_ah_offsetmask, \
	&ip4_ipsec_dfbit, \
	&ip4_ipsec_ecn, \
	&ipsec_debug, \
}

#define IPSEC6CTL_VARS { \
	0, \
	0, \
	&ip6_def_policy.policy, \
	&ip6_esp_trans_deflev, \
	&ip6_esp_net_deflev, \
	&ip6_ah_trans_deflev, \
	&ip6_ah_net_deflev, \
	&ip6_inbound_call_ike, \
	0, \
	0, \
	0, \
	&ip6_ipsec_ecn, \
	&ipsec_debug, \
}
#endif

#if KERNEL
struct ipsec_output_state {
	struct mbuf *m;
	struct route *ro;
	struct sockaddr *dst;
};

extern int ipsec_debug;

#if INET
extern struct ipsecstat ipsecstat;
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_inbound_call_ike;
extern int ip4_ah_cleartos;
extern int ip4_ah_offsetmask;
extern int ip4_ipsec_dfbit;
extern int ip4_ipsec_ecn;
#endif

#if INET6
extern struct ipsecstat ipsec6stat;
extern struct secpolicy ip6_def_policy;
extern int ip6_esp_trans_deflev;
extern int ip6_esp_net_deflev;
extern int ip6_ah_trans_deflev;
extern int ip6_ah_net_deflev;
extern int ip6_inbound_call_ike;
extern int ip6_ipsec_ecn;
#endif

#define ipseclog(x)	do { if (ipsec_debug) log x; } while (0)

extern struct secpolicy *ipsec4_getpolicybysock
	__P((struct mbuf *, u_int, struct socket *, int *));
extern struct secpolicy *ipsec4_getpolicybyaddr
	__P((struct mbuf *, u_int, int, int *));

#if INET6
extern struct secpolicy *ipsec6_getpolicybysock
	__P((struct mbuf *, u_int, struct socket *, int *));
extern struct secpolicy *ipsec6_getpolicybyaddr
	__P((struct mbuf *, u_int, int, int *));
#endif /*INET6*/

struct inpcb;
#if INET6
struct in6pcb;
#endif
extern int ipsec_init_policy __P((struct socket *so, struct inpcbpolicy **));
extern int ipsec_copy_policy
	__P((struct inpcbpolicy *, struct inpcbpolicy *));
extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *));

extern int ipsec4_set_policy __P((struct inpcb *inp, int optname,
	caddr_t request, size_t len, int priv));
extern int ipsec4_get_policy __P((struct inpcb *inpcb, caddr_t request,
	size_t len, struct mbuf **mp));
extern int ipsec4_delete_pcbpolicy __P((struct inpcb *));
extern int ipsec4_in_reject_so __P((struct mbuf *, struct socket *));
extern int ipsec4_in_reject __P((struct mbuf *, struct inpcb *));

#if INET6
extern int ipsec6_in_reject_so __P((struct mbuf *, struct socket *));
#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
extern int ipsec6_delete_pcbpolicy __P((struct inpcb *));
extern int ipsec6_set_policy __P((struct inpcb *inp, int optname,
	caddr_t request, size_t len, int priv));
extern int ipsec6_get_policy
	__P((struct inpcb *inp, caddr_t request, size_t len, struct mbuf **mp));
extern int ipsec6_in_reject __P((struct mbuf *, struct inpcb *));
#else
extern int ipsec6_delete_pcbpolicy __P((struct in6pcb *));
extern int ipsec6_set_policy __P((struct in6pcb *in6p, int optname,
	caddr_t request, size_t len, int priv));
extern int ipsec6_get_policy __P((struct in6pcb *in6p, caddr_t request,
	size_t len, struct mbuf **mp));
extern int ipsec6_in_reject __P((struct mbuf *, struct in6pcb *));
#endif
#endif /*INET6*/

struct secas;
struct tcpcb;
struct tcp6cb;
extern int ipsec_chkreplay __P((u_int32_t, struct secasvar *));
extern int ipsec_updatereplay __P((u_int32_t, struct secasvar *));

extern size_t ipsec4_hdrsiz __P((struct mbuf *, u_int, struct inpcb *));
#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *, int));
#else
extern size_t ipsec4_hdrsiz_tcp __P((struct tcpcb *));
#endif
#if INET6
#if defined(__FreeBSD__) && __FreeBSD__ >= 3 || defined (__APPLE__)
extern size_t ipsec6_hdrsiz __P((struct mbuf *, u_int, struct inpcb *));
#else
extern size_t ipsec6_hdrsiz __P((struct mbuf *, u_int, struct in6pcb *));
#if defined(__NetBSD__) && !defined(TCP6)
extern size_t ipsec6_hdrsiz_tcp __P((struct tcpcb *));
#else
extern size_t ipsec6_hdrsiz_tcp __P((struct tcp6cb *));
#endif
#endif
#endif

struct ip;
#if INET6
struct ip6_hdr;
#endif
extern const char *ipsec4_logpacketstr __P((struct ip *, u_int32_t));
#if INET6
extern const char *ipsec6_logpacketstr __P((struct ip6_hdr *, u_int32_t));
#endif
extern const char *ipsec_logsastr __P((struct secasvar *));

extern void ipsec_dumpmbuf __P((struct mbuf *));

extern int ipsec4_output __P((struct ipsec_output_state *, struct secpolicy *,
	int));
#if INET6
extern int ipsec6_output_trans __P((struct ipsec_output_state *, u_char *,
	struct mbuf *, struct secpolicy *, int, int *));
extern int ipsec6_output_tunnel __P((struct ipsec_output_state *,
	struct secpolicy *, int));
#endif
extern int ipsec4_tunnel_validate __P((struct ip *, u_int, struct secasvar *));
#if INET6
extern int ipsec6_tunnel_validate __P((struct ip6_hdr *, u_int,
	struct secasvar *));
#endif
extern struct mbuf *ipsec_copypkt __P((struct mbuf *));
extern void ipsec_setsocket __P((struct mbuf *, struct socket *));
extern struct socket *ipsec_getsocket __P((struct mbuf *));

#if defined(__bsdi__) || defined(__NetBSD__)
extern int ipsec_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
extern int ipsec6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
#endif /* __bsdi__ || __NetBSD__ */

#endif /*KERNEL*/

#ifndef KERNEL
extern caddr_t ipsec_set_policy __P((char *policy, int buflen));
extern int ipsec_get_policylen __P((caddr_t buf));
extern char *ipsec_dump_policy __P((caddr_t buf, char *delimiter));

extern char *ipsec_strerror __P((void));
#endif /*!KERNEL*/

#endif /*_NETINET6_IPSEC_H_*/
Commit	Line	Data
1c79356b A	1	/* $KAME: ipsec.h,v 1.28 2000/03/15 13:07:57 sakane Exp $ */
	2
	3	/*
	4	* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. Neither the name of the project nor the names of its contributors
	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
	32	/*
	33	* IPsec controller part.
	34	*/
	35
	36	#ifndef _NETINET6_IPSEC_H_
	37	#define _NETINET6_IPSEC_H_
	38
	39	#include <net/pfkeyv2.h>
	40	#include <netkey/keydb.h>
	41
	42	#if KERNEL
	43	/*
	44	* Security Policy Index
	45	* NOTE: Encure to be same address family and upper layer protocol.
	46	* NOTE: ul_proto, port number, uid, gid:
	47	* ANY: reserved for waldcard.
	48	* 0 to (~0 - 1): is one of the number of each value.
	49	*/
	50	struct secpolicyindex {
	51	u_int8_t dir; /* direction of packet flow, see blow */
	52	struct sockaddr_storage src; /* IP src address for SP */
	53	struct sockaddr_storage dst; /* IP dst address for SP */
	54	u_int8_t prefs; /* prefix length in bits for src */
	55	u_int8_t prefd; /* prefix length in bits for dst */
	56	u_int16_t ul_proto; /* upper layer Protocol */
	57	#ifdef notyet
	58	uid_t uids;
	59	uid_t uidd;
	60	gid_t gids;
	61	gid_t gidd;
	62	#endif
	63	};
	64
65	/* Security Policy Data Base */
66	struct secpolicy {
67	LIST_ENTRY(secpolicy) chain;
68
69	int refcnt; /* reference count */
70	struct secpolicyindex spidx; /* selector */
71	u_int32_t id; /* It's unique number on the system. */
72	u_int state; /* 0: dead, others: alive */
73	#define IPSEC_SPSTATE_DEAD 0
74	#define IPSEC_SPSTATE_ALIVE 1
75
76	u_int policy; /* DISCARD, NONE or IPSEC, see keyv2.h */
77	struct ipsecrequest *req;
78	/* pointer to the ipsec request tree, */
79	/* if policy == IPSEC else this value == NULL.*/
80	};
81
82	/* Request for IPsec */
83	struct ipsecrequest {
84	struct ipsecrequest *next;
85	/* pointer to next structure */
86	/* If NULL, it means the end of chain. */
87	struct secasindex saidx;/* hint for search proper SA */
88	/* if __ss_len == 0 then no address specified.*/
89	u_int level; /* IPsec level defined below. */
90
91	struct secasvar sav; / place holder of SA for use */
92	struct secpolicy sp; / back pointer to SP */
93	};
94
95	/* security policy in PCB */
96	struct inpcbpolicy {
97	struct secpolicy *sp_in;
98	struct secpolicy *sp_out;
99	int priv; /* privileged socket ? */
100	};
101
102	/* SP acquiring list table. */
103	struct secspacq {
104	LIST_ENTRY(secspacq) chain;
105
106	struct secpolicyindex spidx;
107
108	u_int32_t tick; /* for lifetime */
109	int count; /* for lifetime */
110	/* XXX: here is mbuf place holder to be sent ? */
111	};
112	#endif /KERNEL/
113
114	/* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */
115	#define IPSEC_PORT_ANY 0
116	#define IPSEC_ULPROTO_ANY 255
117	#define IPSEC_PROTO_ANY 255
118
119	/* mode of security protocol */
120	/* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */
121	#define IPSEC_MODE_ANY 0 /* i.e. wildcard. */
122	#define IPSEC_MODE_TRANSPORT 1
123	#define IPSEC_MODE_TUNNEL 2
124
125	/*
126	* Direction of security policy.
127	* NOTE: Since INVALID is used just as flag.
128	* The other are used for loop counter too.
129	*/
130	#define IPSEC_DIR_ANY 0
131	#define IPSEC_DIR_INBOUND 1
132	#define IPSEC_DIR_OUTBOUND 2
133	#define IPSEC_DIR_MAX 3
134	#define IPSEC_DIR_INVALID 4
135
136	/* Policy level */
137	/*
138	* IPSEC, ENTRUST and BYPASS are allowd for setsockopt() in PCB,
139	* DISCARD, IPSEC and NONE are allowd for setkey() in SPD.
140	* DISCARD and NONE are allowd for system default.
141	*/
142	#define IPSEC_POLICY_DISCARD 0 /* discarding packet */
143	#define IPSEC_POLICY_NONE 1 /* through IPsec engine */
144	#define IPSEC_POLICY_IPSEC 2 /* do IPsec */
145	#define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */
146	#define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */
147
148	/* Security protocol level */
149	#define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */
150	#define IPSEC_LEVEL_USE 1 /* use SA if present. */
151	#define IPSEC_LEVEL_REQUIRE 2 /* require SA. */
152	#define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */
153
154	#define IPSEC_MANUAL_REQID_MAX 0x3fff
155	/*
156	* if security policy level == unique, this id
157	* indicate to a relative SA for use, else is
158	* zero.
159	* 1 - 0x3fff are reserved for manual keying.
160	* 0 are reserved for above reason. Others is
161	* for kernel use.
162	* Note that this id doesn't identify SA
163	* by only itself.
164	*/
165	#define IPSEC_REPLAYWSIZE 32
166
167	/* statistics for ipsec processing */
168	struct ipsecstat {
169	u_quad_t in_success; /* succeeded inbound process */
170	u_quad_t in_polvio;
171	/* security policy violation for inbound process */
172	u_quad_t in_nosa; /* inbound SA is unavailable */
173	u_quad_t in_inval; /* inbound processing failed due to EINVAL */
174	u_quad_t in_nomem; /* inbound processing failed due to ENOBUFS */
175	u_quad_t in_badspi; /* failed getting a SPI */
176	u_quad_t in_ahreplay; /* AH replay check failed */
177	u_quad_t in_espreplay; /* ESP replay check failed */
178	u_quad_t in_ahauthsucc; /* AH authentication success */
179	u_quad_t in_ahauthfail; /* AH authentication failure */
180	u_quad_t in_espauthsucc; /* ESP authentication success */
181	u_quad_t in_espauthfail; /* ESP authentication failure */
182	u_quad_t in_esphist[256];
183	u_quad_t in_ahhist[256];
184	u_quad_t in_comphist[256];
185	u_quad_t out_success; /* succeeded outbound process */
186	u_quad_t out_polvio;
187	/* security policy violation for outbound process */
188	u_quad_t out_nosa; /* outbound SA is unavailable */
189	u_quad_t out_inval; /* outbound process failed due to EINVAL */
190	u_quad_t out_nomem; /* inbound processing failed due to ENOBUFS */
191	u_quad_t out_noroute; /* there is no route */
192	u_quad_t out_esphist[256];
193	u_quad_t out_ahhist[256];
194	u_quad_t out_comphist[256];
195	};
196
197	/*
198	* Definitions for IPsec & Key sysctl operations.
199	*/
200	/*
201	* Names for IPsec & Key sysctl objects
202	*/
203	#define IPSECCTL_STATS 1 /* stats */
204	#define IPSECCTL_DEF_POLICY 2
205	#define IPSECCTL_DEF_ESP_TRANSLEV 3 /* int; ESP transport mode */
206	#define IPSECCTL_DEF_ESP_NETLEV 4 /* int; ESP tunnel mode */
207	#define IPSECCTL_DEF_AH_TRANSLEV 5 /* int; AH transport mode */
208	#define IPSECCTL_DEF_AH_NETLEV 6 /* int; AH tunnel mode */
209	#define IPSECCTL_INBOUND_CALL_IKE 7
210	#define IPSECCTL_AH_CLEARTOS 8
211	#define IPSECCTL_AH_OFFSETMASK 9
212	#define IPSECCTL_DFBIT 10
213	#define IPSECCTL_ECN 11
214	#define IPSECCTL_DEBUG 12
215	#define IPSECCTL_MAXID 13
216
217	#define IPSECCTL_NAMES { \
218	{ 0, 0 }, \
219	{ 0, 0 }, \
220	{ "def_policy", CTLTYPE_INT }, \
221	{ "esp_trans_deflev", CTLTYPE_INT }, \
222	{ "esp_net_deflev", CTLTYPE_INT }, \
223	{ "ah_trans_deflev", CTLTYPE_INT }, \
224	{ "ah_net_deflev", CTLTYPE_INT }, \
225	{ "inbound_call_ike", CTLTYPE_INT }, \
226	{ "ah_cleartos", CTLTYPE_INT }, \
227	{ "ah_offsetmask", CTLTYPE_INT }, \
228	{ "dfbit", CTLTYPE_INT }, \
229	{ "ecn", CTLTYPE_INT }, \
230	{ "debug", CTLTYPE_INT }, \
231	}
232
233	#define IPSEC6CTL_NAMES { \
234	{ 0, 0 }, \
235	{ 0, 0 }, \
236	{ "def_policy", CTLTYPE_INT }, \
237	{ "esp_trans_deflev", CTLTYPE_INT }, \
238	{ "esp_net_deflev", CTLTYPE_INT }, \
239	{ "ah_trans_deflev", CTLTYPE_INT }, \
240	{ "ah_net_deflev", CTLTYPE_INT }, \
241	{ "inbound_call_ike", CTLTYPE_INT }, \
242	{ 0, 0 }, \
243	{ 0, 0 }, \
244	{ 0, 0 }, \
245	{ "ecn", CTLTYPE_INT }, \
246	{ "debug", CTLTYPE_INT }, \
247	}
248
249	#ifdef __bsdi__
250	#define IPSECCTL_VARS { \
251	0, \
252	0, \
253	&ip4_def_policy.policy, \
254	&ip4_esp_trans_deflev, \
255	&ip4_esp_net_deflev, \
256	&ip4_ah_trans_deflev, \
257	&ip4_ah_net_deflev, \
258	&ip4_inbound_call_ike, \
259	&ip4_ah_cleartos, \
260	&ip4_ah_offsetmask, \
261	&ip4_ipsec_dfbit, \
262	&ip4_ipsec_ecn, \
263	&ipsec_debug, \
264	}
265
266	#define IPSEC6CTL_VARS { \
267	0, \
268	0, \
269	&ip6_def_policy.policy, \
270	&ip6_esp_trans_deflev, \
271	&ip6_esp_net_deflev, \
272	&ip6_ah_trans_deflev, \
273	&ip6_ah_net_deflev, \
274	&ip6_inbound_call_ike, \
275	0, \
276	0, \
277	0, \
278	&ip6_ipsec_ecn, \
279	&ipsec_debug, \
280	}
281	#endif
282
283	#if KERNEL
284	struct ipsec_output_state {
285	struct mbuf *m;
286	struct route *ro;
287	struct sockaddr *dst;
288	};
289
290	extern int ipsec_debug;
291
292	#if INET
293	extern struct ipsecstat ipsecstat;
294	extern struct secpolicy ip4_def_policy;
295	extern int ip4_esp_trans_deflev;
296	extern int ip4_esp_net_deflev;
297	extern int ip4_ah_trans_deflev;
298	extern int ip4_ah_net_deflev;
299	extern int ip4_inbound_call_ike;
300	extern int ip4_ah_cleartos;
301	extern int ip4_ah_offsetmask;
302	extern int ip4_ipsec_dfbit;
303	extern int ip4_ipsec_ecn;
304	#endif
305
306	#if INET6
307	extern struct ipsecstat ipsec6stat;
308	extern struct secpolicy ip6_def_policy;
309	extern int ip6_esp_trans_deflev;
310	extern int ip6_esp_net_deflev;
311	extern int ip6_ah_trans_deflev;
312	extern int ip6_ah_net_deflev;
313	extern int ip6_inbound_call_ike;
314	extern int ip6_ipsec_ecn;
315	#endif
316
317	#define ipseclog(x) do { if (ipsec_debug) log x; } while (0)
318
319	extern struct secpolicy *ipsec4_getpolicybysock
320	__P((struct mbuf , u_int, struct socket , int *));
321	extern struct secpolicy *ipsec4_getpolicybyaddr
322	__P((struct mbuf , u_int, int, int ));
323
324	#if INET6
325	extern struct secpolicy *ipsec6_getpolicybysock
326	__P((struct mbuf , u_int, struct socket , int *));
327	extern struct secpolicy *ipsec6_getpolicybyaddr
328	__P((struct mbuf , u_int, int, int ));
329	#endif /INET6/
330
331	struct inpcb;
332	#if INET6
333	struct in6pcb;
334	#endif
335	extern int ipsec_init_policy __P((struct socket so, struct inpcbpolicy *));
336	extern int ipsec_copy_policy
337	__P((struct inpcbpolicy , struct inpcbpolicy ));
338	extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *));
339
340	extern int ipsec4_set_policy __P((struct inpcb *inp, int optname,
341	caddr_t request, size_t len, int priv));
342	extern int ipsec4_get_policy __P((struct inpcb *inpcb, caddr_t request,
343	size_t len, struct mbuf **mp));
344	extern int ipsec4_delete_pcbpolicy __P((struct inpcb *));
345	extern int ipsec4_in_reject_so __P((struct mbuf , struct socket ));
346	extern int ipsec4_in_reject __P((struct mbuf , struct inpcb ));
347
348	#if INET6
349	extern int ipsec6_in_reject_so __P((struct mbuf , struct socket ));
350	#if defined(__FreeBSD__) && __FreeBSD__ >= 3 \|\| defined (__APPLE__)
351	extern int ipsec6_delete_pcbpolicy __P((struct inpcb *));
352	extern int ipsec6_set_policy __P((struct inpcb *inp, int optname,
353	caddr_t request, size_t len, int priv));
354	extern int ipsec6_get_policy
355	__P((struct inpcb inp, caddr_t request, size_t len, struct mbuf *mp));
356	extern int ipsec6_in_reject __P((struct mbuf , struct inpcb ));
357	#else
358	extern int ipsec6_delete_pcbpolicy __P((struct in6pcb *));
359	extern int ipsec6_set_policy __P((struct in6pcb *in6p, int optname,
360	caddr_t request, size_t len, int priv));
361	extern int ipsec6_get_policy __P((struct in6pcb *in6p, caddr_t request,
362	size_t len, struct mbuf **mp));
363	extern int ipsec6_in_reject __P((struct mbuf , struct in6pcb ));
364	#endif
365	#endif /INET6/
366
367	struct secas;
368	struct tcpcb;
369	struct tcp6cb;
370	extern int ipsec_chkreplay __P((u_int32_t, struct secasvar *));
371	extern int ipsec_updatereplay __P((u_int32_t, struct secasvar *));
372
373	extern size_t ipsec4_hdrsiz __P((struct mbuf , u_int, struct inpcb ));
374	#if defined(__FreeBSD__) && __FreeBSD__ >= 3 \|\| defined (__APPLE__)
375	extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *, int));
376	#else
377	extern size_t ipsec4_hdrsiz_tcp __P((struct tcpcb *));
378	#endif
379	#if INET6
380	#if defined(__FreeBSD__) && __FreeBSD__ >= 3 \|\| defined (__APPLE__)
381	extern size_t ipsec6_hdrsiz __P((struct mbuf , u_int, struct inpcb ));
382	#else
383	extern size_t ipsec6_hdrsiz __P((struct mbuf , u_int, struct in6pcb ));
384	#if defined(__NetBSD__) && !defined(TCP6)
385	extern size_t ipsec6_hdrsiz_tcp __P((struct tcpcb *));
386	#else
387	extern size_t ipsec6_hdrsiz_tcp __P((struct tcp6cb *));
388	#endif
389	#endif
390	#endif
391
392	struct ip;
393	#if INET6
394	struct ip6_hdr;
395	#endif
396	extern const char ipsec4_logpacketstr __P((struct ip , u_int32_t));
397	#if INET6
398	extern const char ipsec6_logpacketstr __P((struct ip6_hdr , u_int32_t));
399	#endif
400	extern const char ipsec_logsastr __P((struct secasvar ));
401
402	extern void ipsec_dumpmbuf __P((struct mbuf *));
403
404	extern int ipsec4_output __P((struct ipsec_output_state , struct secpolicy ,
405	int));
406	#if INET6
407	extern int ipsec6_output_trans __P((struct ipsec_output_state , u_char ,
408	struct mbuf , struct secpolicy , int, int *));
409	extern int ipsec6_output_tunnel __P((struct ipsec_output_state *,
410	struct secpolicy *, int));
411	#endif
412	extern int ipsec4_tunnel_validate __P((struct ip , u_int, struct secasvar ));
413	#if INET6
414	extern int ipsec6_tunnel_validate __P((struct ip6_hdr *, u_int,
415	struct secasvar *));
416	#endif
417	extern struct mbuf ipsec_copypkt __P((struct mbuf ));
418	extern void ipsec_setsocket __P((struct mbuf , struct socket ));
419	extern struct socket ipsec_getsocket __P((struct mbuf ));
420
421	#if defined(__bsdi__) \|\| defined(__NetBSD__)
422	extern int ipsec_sysctl __P((int , u_int, void , size_t , void , size_t));
423	extern int ipsec6_sysctl __P((int , u_int, void , size_t , void , size_t));
424	#endif /* __bsdi__ \|\| __NetBSD__ */
425
426	#endif /KERNEL/
427
428	#ifndef KERNEL
429	extern caddr_t ipsec_set_policy __P((char *policy, int buflen));
430	extern int ipsec_get_policylen __P((caddr_t buf));
431	extern char ipsec_dump_policy __P((caddr_t buf, char delimiter));
432
433	extern char *ipsec_strerror __P((void));
434	#endif /!KERNEL/
435
436	#endif /_NETINET6_IPSEC_H_/