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freebsd-skq/sys/netinet6/ipsec.h
Sam Leffler 5d84645305 Replace aux mbufs with packet tags: 
o instead of a list of mbufs use a list of m_tag structures a la openbsd
o for netgraph et. al. extend the stock openbsd m_tag to include a 32-bit
  ABI/module number cookie
o for openbsd compatibility define a well-known cookie MTAG_ABI_COMPAT and
  use this in defining openbsd-compatible m_tag_find and m_tag_get routines
o rewrite KAME use of aux mbufs in terms of packet tags
o eliminate the most heavily used aux mbufs by adding an additional struct
  inpcb parameter to ip_output and ip6_output to allow the IPsec code to
  locate the security policy to apply to outbound packets
o bump __FreeBSD_version so code can be conditionalized
o fixup ipfilter's call to ip_output based on __FreeBSD_version

Reviewed by:	julian, luigi (silent), -arch, -net, darren
Approved by:	julian, silence from everyone else
Obtained from:	openbsd (mostly)
MFC after:	1 month
2002-10-16 01:54:46 +00:00

352 lines
11 KiB
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/* $FreeBSD$ */
/* $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 _NETINET6_IPSEC_H_
#define _NETINET6_IPSEC_H_
#if defined(_KERNEL) && !defined(_LKM) && !defined(KLD_MODULE)
#include "opt_inet.h"
#include "opt_ipsec.h"
#endif
#include <net/pfkeyv2.h>
#include <netkey/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 */
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.*/
/*
* 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 ? */
};
/* 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
/*
* 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
/* 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 */
#if 0 /* obsolete, do not reuse */
#define IPSECCTL_INBOUND_CALL_IKE 7
#endif
#define IPSECCTL_AH_CLEARTOS 8
#define IPSECCTL_AH_OFFSETMASK 9
#define IPSECCTL_DFBIT 10
#define IPSECCTL_ECN 11
#define IPSECCTL_DEBUG 12
#define IPSECCTL_ESP_RANDPAD 13
#define IPSECCTL_MAXID 14
#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 }, \
{ 0, 0 }, \
{ "ah_cleartos", CTLTYPE_INT }, \
{ "ah_offsetmask", CTLTYPE_INT }, \
{ "dfbit", CTLTYPE_INT }, \
{ "ecn", CTLTYPE_INT }, \
{ "debug", CTLTYPE_INT }, \
{ "esp_randpad", 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 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ 0, 0 }, \
{ "ecn", CTLTYPE_INT }, \
{ "debug", CTLTYPE_INT }, \
{ "esp_randpad", CTLTYPE_INT }, \
}
#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;
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_ah_cleartos;
extern int ip4_ah_offsetmask;
extern int ip4_ipsec_dfbit;
extern int ip4_ipsec_ecn;
extern int ip4_esp_randpad;
#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 *));
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, 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 *));
struct secas;
struct tcpcb;
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 mbuf *, int, u_int,
struct secasvar *));
extern struct mbuf *ipsec_copypkt __P((struct mbuf *));
extern void ipsec_delaux __P((struct mbuf *));
extern int ipsec_addhist __P((struct mbuf *, int, u_int32_t));
extern struct ipsec_history *ipsec_gethist __P((struct mbuf *, int *));
#endif /* _KERNEL */
#ifndef _KERNEL
extern caddr_t ipsec_set_policy __P((char *, int));
extern int ipsec_get_policylen __P((caddr_t));
extern char *ipsec_dump_policy __P((caddr_t, char *));
extern const char *ipsec_strerror __P((void));
#endif /* !_KERNEL */
#endif /* _NETINET6_IPSEC_H_ */
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