/*
* 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.
*/
/*
* 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 */
};
/* Security Policy Data Base */
struct secpolicy {
struct pslist_entry pslist_entry;
u_int origin; /* who generate this SP. */
#define IPSEC_SPORIGIN_USER 0
#define IPSEC_SPORIGIN_KERNEL 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.
*/
time_t created; /* time created the policy */
time_t lastused; /* updated every when kernel sends a packet */
time_t lifetime; /* duration of the lifetime of this policy */
time_t 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. */
time_t created; /* for lifetime */
int count; /* for lifetime */
/* XXX: here is mbuf place holder to be sent ? */
};
#endif /* _KERNEL */
/* buffer size for formatted output of ipsec address (addr + '%' + scope_id?) */
#define IPSEC_ADDRSTRLEN (INET6_ADDRSTRLEN + 11)
/* buffer size for ipsec_logsastr() */
#define IPSEC_LOGSASTRLEN 192
/* 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
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 crypto_support;
#include <sys/syslog.h>
#define DPRINTF(fmt, args...) \
do { \
if (ipsec_debug) \
log(LOG_DEBUG, "%s: " fmt, __func__, ##args); \
} while (/*CONSTCOND*/0)
#define IPSECLOG(level, fmt, args...) \
do { \
if (ipsec_debug) \
log(level, "%s: " fmt, __func__, ##args); \
} while (/*CONSTCOND*/0)
