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ipsec.h
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/*
* 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.
*
* $FreeBSD$
*/
/*
* IPsec controller part.
*/
#ifndef _NETINET6_IPSEC_H_
#define _NETINET6_IPSEC_H_
#include <net/pfkeyv2.h>
#include <netkey/keydb.h>
#ifdef _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 */
};
/* Security Policy Data Base */
struct secpolicy {
LIST_ENTRY(secpolicy) chain;
int refcnt; /* reference count */
struct secpolicyindex spidx; /* selector */
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;
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 ? */
};
#endif /*_KERNEL*/
#define IPSEC_PORT_ANY 65535
#define IPSEC_ULPROTO_ANY 255
#define IPSEC_PROTO_ANY 65535
/* 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_REPLAYWSIZE 32
/* statistics for ipsec processing */
struct ipsecstat {
u_long in_success; /* succeeded inbound process */
u_long in_polvio; /* security policy violation for inbound process */
u_long in_nosa; /* inbound SA is unavailable */
u_long in_inval; /* inbound processing failed due to EINVAL */
u_long in_badspi; /* failed getting a SPI */
u_long in_ahreplay; /* AH replay check failed */
u_long in_espreplay; /* ESP replay check failed */
u_long in_ahauthsucc; /* AH authentication success */
u_long in_ahauthfail; /* AH authentication failure */
u_long in_espauthsucc; /* ESP authentication success */
u_long in_espauthfail; /* ESP authentication failure */
u_long in_esphist[SADB_EALG_MAX];
u_long in_ahhist[SADB_AALG_MAX];
u_long out_success; /* succeeded outbound process */
u_long out_polvio; /* security policy violation for outbound process */
u_long out_nosa; /* outbound SA is unavailable */
u_long out_inval; /* outbound process failed due to EINVAL */
u_long out_noroute; /* there is no route */
u_long out_esphist[SADB_EALG_MAX];
u_long out_ahhist[SADB_AALG_MAX];
};
/*
* 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_MAXID 12
#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 }, \
}
#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 }, \
}
#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, \
}
#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, \
}
#ifdef _KERNEL
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet_ipsec);
#endif
struct ipsec_output_state {
struct mbuf *m;
struct route *ro;
struct sockaddr *dst;
};
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;
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 *));
struct inpcb;
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, int priv));
extern int ipsec4_get_policy
__P((struct inpcb *inpcb, caddr_t request, 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 *));
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 *));
extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *));
struct ip;
extern const char *ipsec4_logpacketstr __P((struct ip *, u_int32_t));
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));
extern int ipsec4_tunnel_validate __P((struct ip *, u_int,
struct secasvar *));
extern struct mbuf *ipsec_copypkt __P((struct mbuf *));
#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_*/

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