389 lines
12 KiB
C
389 lines
12 KiB
C
/* $FreeBSD$ */
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/* $KAME: ipsec.h,v 1.69 2003/09/10 23:49:11 itojun Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* IPsec controller part.
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*/
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#ifndef _NETINET6_IPSEC_H_
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#define _NETINET6_IPSEC_H_
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#if defined(_KERNEL) && !defined(_LKM) && !defined(KLD_MODULE)
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#include "opt_inet.h"
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#include "opt_ipsec.h"
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#endif
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#include <net/pfkeyv2.h>
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#include <netkey/keydb.h>
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#ifdef _KERNEL
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/*
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* Security Policy Index
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* Ensure that both address families in the "src" and "dst" are same.
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* When the value of the ul_proto is ICMPv6, the port field in "src"
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* specifies ICMPv6 type, and the port field in "dst" specifies ICMPv6 code.
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*/
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struct secpolicyindex {
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struct sockaddr_storage src; /* IP src address for SP */
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struct sockaddr_storage dst; /* IP dst address for SP */
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u_int8_t prefs; /* prefix length in bits for src */
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u_int8_t prefd; /* prefix length in bits for dst */
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u_int16_t ul_proto; /* upper layer Protocol */
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#ifdef notyet
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uid_t uids;
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uid_t uidd;
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gid_t gids;
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gid_t gidd;
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#endif
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};
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/* Security Policy Data Base */
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struct secpolicy {
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TAILQ_ENTRY(secpolicy) tailq; /* all SPD entries, both pcb/table */
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LIST_ENTRY(secpolicy) chain; /* SPD entries on table */
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u_int8_t dir; /* direction of packet flow */
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int readonly; /* write prohibited */
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int persist; /* will never be removed */
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int refcnt; /* reference count */
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struct secpolicyindex *spidx; /* selector - NULL if not valid */
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u_int32_t id; /* it identifies a policy in the SPD. */
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#define IPSEC_MANUAL_POLICYID_MAX 0x3fff
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/*
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* 1 - 0x3fff are reserved for user operation.
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* 0 are reserved. Others are for kernel use.
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*/
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struct socket *so; /* backpointer to per-socket policy */
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u_int state; /* 0: dead, others: alive */
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#define IPSEC_SPSTATE_DEAD 0
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#define IPSEC_SPSTATE_ALIVE 1
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int policy; /* DISCARD, NONE or IPSEC, see below */
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struct ipsecrequest *req;
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/* pointer to the ipsec request tree, */
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/* if policy == IPSEC else this value == NULL.*/
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/*
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* lifetime handler.
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* the policy can be used without limitiation if both lifetime and
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* validtime are zero.
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* "lifetime" is passed by sadb_lifetime.sadb_lifetime_addtime.
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* "validtime" is passed by sadb_lifetime.sadb_lifetime_usetime.
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*/
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long created; /* time created the policy */
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long lastused; /* updated every when kernel sends a packet */
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long lifetime; /* duration of the lifetime of this policy */
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long validtime; /* duration this policy is valid without use */
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};
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/* Request for IPsec */
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struct ifnet;
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struct ipsecrequest {
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struct ipsecrequest *next;
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/* pointer to next structure */
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/* If NULL, it means the end of chain. */
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struct secasindex saidx;/* hint for search proper SA */
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/* if __ss_len == 0 then no address specified.*/
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u_int level; /* IPsec level defined below. */
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struct secasvar *sav; /* place holder of SA for use */
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struct secpolicy *sp; /* back pointer to SP */
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struct ifnet *tunifp; /* interface for tunnelling */
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};
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/* security policy in PCB */
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struct inpcbpolicy {
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struct secpolicy *sp_in;
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struct secpolicy *sp_out;
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int priv; /* privileged socket ? */
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/* cached policy */
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/* XXX 3 == IPSEC_DIR_MAX */
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struct secpolicy *cache[3];
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struct secpolicyindex cacheidx[3];
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int cachegen[3]; /* cache generation #, the time we filled it */
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int cacheflags;
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#define IPSEC_PCBSP_CONNECTED 1
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};
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/* SP acquiring list table. */
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struct secspacq {
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LIST_ENTRY(secspacq) chain;
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struct secpolicyindex spidx;
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long created; /* for lifetime */
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int count; /* for lifetime */
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/* XXX: here is mbuf place holder to be sent ? */
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};
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struct ipsecaux {
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int hdrs; /* # of ipsec headers */
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};
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#endif /* _KERNEL */
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/* according to IANA assignment, port 0x0000 and proto 0xff are reserved. */
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#define IPSEC_PORT_ANY 0
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#define IPSEC_ULPROTO_ANY 255
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#define IPSEC_PROTO_ANY 255
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/* mode of security protocol */
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/* NOTE: DON'T use IPSEC_MODE_ANY at SPD. It's only use in SAD */
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#define IPSEC_MODE_ANY 0 /* i.e. wildcard. */
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#define IPSEC_MODE_TRANSPORT 1
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#define IPSEC_MODE_TUNNEL 2
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#define IPSEC_MODE_TCPMD5 3 /* TCP MD5 mode */
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/*
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* Direction of security policy.
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* NOTE: Since INVALID is used just as flag.
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* The other are used for loop counter too.
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*/
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#define IPSEC_DIR_ANY 0
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#define IPSEC_DIR_INBOUND 1
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#define IPSEC_DIR_OUTBOUND 2
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#define IPSEC_DIR_MAX 3
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#define IPSEC_DIR_INVALID 4
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/* Policy level */
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/*
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* IPSEC, ENTRUST and BYPASS are allowed for setsockopt() in PCB,
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* DISCARD, IPSEC and NONE are allowed for setkey() in SPD.
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* DISCARD and NONE are allowed for system default.
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*/
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#define IPSEC_POLICY_DISCARD 0 /* discard the packet */
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#define IPSEC_POLICY_NONE 1 /* bypass IPsec engine */
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#define IPSEC_POLICY_IPSEC 2 /* pass to IPsec */
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#define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */
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#define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */
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#define IPSEC_POLICY_TCP 5 /* TCP MD5 policy */
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/* Security protocol level */
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#define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */
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#define IPSEC_LEVEL_USE 1 /* use SA if present. */
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#define IPSEC_LEVEL_REQUIRE 2 /* require SA. */
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#define IPSEC_LEVEL_UNIQUE 3 /* unique SA. */
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#define IPSEC_MANUAL_REQID_MAX 0x3fff
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/*
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* if security policy level == unique, this id
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* indicate to a relative SA for use, else is
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* zero.
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* 1 - 0x3fff are reserved for manual keying.
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* 0 are reserved for above reason. Others is
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* for kernel use.
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* Note that this id doesn't identify SA
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* by only itself.
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*/
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#define IPSEC_REPLAYWSIZE 32
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/* statistics for ipsec processing */
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struct ipsecstat {
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u_quad_t in_success; /* succeeded inbound process */
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u_quad_t in_polvio;
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/* security policy violation for inbound process */
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u_quad_t in_nosa; /* inbound SA is unavailable */
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u_quad_t in_inval; /* inbound processing failed due to EINVAL */
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u_quad_t in_nomem; /* inbound processing failed due to ENOBUFS */
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u_quad_t in_badspi; /* failed getting a SPI */
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u_quad_t in_ahreplay; /* AH replay check failed */
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u_quad_t in_espreplay; /* ESP replay check failed */
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u_quad_t in_ahauthsucc; /* AH authentication success */
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u_quad_t in_ahauthfail; /* AH authentication failure */
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u_quad_t in_espauthsucc; /* ESP authentication success */
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u_quad_t in_espauthfail; /* ESP authentication failure */
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u_quad_t in_esphist[256];
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u_quad_t in_ahhist[256];
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u_quad_t in_comphist[256];
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u_quad_t out_success; /* succeeded outbound process */
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u_quad_t out_polvio;
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/* security policy violation for outbound process */
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u_quad_t out_nosa; /* outbound SA is unavailable */
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u_quad_t out_inval; /* outbound process failed due to EINVAL */
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u_quad_t out_nomem; /* inbound processing failed due to ENOBUFS */
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u_quad_t out_noroute; /* there is no route */
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u_quad_t out_esphist[256];
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u_quad_t out_ahhist[256];
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u_quad_t out_comphist[256];
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u_quad_t spdcachelookup;
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u_quad_t spdcachemiss;
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};
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/*
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* Definitions for IPsec & Key sysctl operations.
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*/
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/*
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* Names for IPsec & Key sysctl objects
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*/
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#define IPSECCTL_STATS 1 /* stats */
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#define IPSECCTL_DEF_POLICY 2
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#define IPSECCTL_DEF_ESP_TRANSLEV 3 /* int; ESP transport mode */
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#define IPSECCTL_DEF_ESP_NETLEV 4 /* int; ESP tunnel mode */
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#define IPSECCTL_DEF_AH_TRANSLEV 5 /* int; AH transport mode */
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#define IPSECCTL_DEF_AH_NETLEV 6 /* int; AH tunnel mode */
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#if 0 /* obsolete, do not reuse */
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#define IPSECCTL_INBOUND_CALL_IKE 7
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#endif
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#define IPSECCTL_AH_CLEARTOS 8
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#define IPSECCTL_AH_OFFSETMASK 9
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#define IPSECCTL_DFBIT 10
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#define IPSECCTL_ECN 11
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#define IPSECCTL_DEBUG 12
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#define IPSECCTL_ESP_RANDPAD 13
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#define IPSECCTL_MAXID 14
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#define IPSECCTL_NAMES { \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "def_policy", CTLTYPE_INT }, \
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{ "esp_trans_deflev", CTLTYPE_INT }, \
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{ "esp_net_deflev", CTLTYPE_INT }, \
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{ "ah_trans_deflev", CTLTYPE_INT }, \
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{ "ah_net_deflev", CTLTYPE_INT }, \
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{ 0, 0 }, \
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{ "ah_cleartos", CTLTYPE_INT }, \
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{ "ah_offsetmask", CTLTYPE_INT }, \
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{ "dfbit", CTLTYPE_INT }, \
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{ "ecn", CTLTYPE_INT }, \
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{ "debug", CTLTYPE_INT }, \
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{ "esp_randpad", CTLTYPE_INT }, \
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}
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#define IPSEC6CTL_NAMES { \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "def_policy", CTLTYPE_INT }, \
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{ "esp_trans_deflev", CTLTYPE_INT }, \
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{ "esp_net_deflev", CTLTYPE_INT }, \
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{ "ah_trans_deflev", CTLTYPE_INT }, \
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{ "ah_net_deflev", CTLTYPE_INT }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ 0, 0 }, \
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{ "ecn", CTLTYPE_INT }, \
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{ "debug", CTLTYPE_INT }, \
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{ "esp_randpad", CTLTYPE_INT }, \
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}
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#ifdef _KERNEL
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struct ipsec_output_state {
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struct mbuf *m;
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struct route *ro;
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struct sockaddr *dst;
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int encap;
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};
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struct ipsec_history {
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int ih_proto;
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u_int32_t ih_spi;
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};
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extern int ipsec_debug;
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#ifdef INET
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extern struct ipsecstat ipsecstat;
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extern struct secpolicy *ip4_def_policy;
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extern int ip4_esp_trans_deflev;
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extern int ip4_esp_net_deflev;
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extern int ip4_ah_trans_deflev;
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extern int ip4_ah_net_deflev;
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extern int ip4_ah_cleartos;
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extern int ip4_ah_offsetmask;
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extern int ip4_ipsec_dfbit;
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extern int ip4_ipsec_ecn;
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extern int ip4_esp_randpad;
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#endif
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#define ipseclog(x) do { if (ipsec_debug) log x; } while (/*CONSTCOND*/ 0)
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extern int ipsec_pcbconn __P((struct inpcbpolicy *));
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extern int ipsec_pcbdisconn __P((struct inpcbpolicy *));
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extern int ipsec_invalpcbcacheall __P((void));
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struct inpcb;
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extern struct secpolicy *ipsec4_getpolicybypcb
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__P((struct mbuf *, u_int, struct inpcb *, int *));
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extern struct secpolicy *ipsec4_getpolicybyaddr
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__P((struct mbuf *, u_int, int, int *));
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extern int ipsec_init_pcbpolicy __P((struct socket *, struct inpcbpolicy **));
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extern int ipsec_copy_pcbpolicy
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__P((struct inpcbpolicy *, struct inpcbpolicy *));
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extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *, int));
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extern int ipsec4_set_policy __P((struct inpcb *, int, caddr_t, size_t, int));
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extern int ipsec4_get_policy __P((struct inpcb *, caddr_t, size_t,
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struct mbuf **));
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extern int ipsec4_delete_pcbpolicy __P((struct inpcb *));
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extern int ipsec4_in_reject __P((struct mbuf *, struct inpcb *));
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struct secas;
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struct tcpcb;
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struct tcp6cb;
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extern int ipsec_chkreplay __P((u_int32_t, struct secasvar *));
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extern int ipsec_updatereplay __P((u_int32_t, struct secasvar *));
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extern size_t ipsec4_hdrsiz __P((struct mbuf *, u_int, struct inpcb *));
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extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *));
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struct ip;
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extern const char *ipsec4_logpacketstr __P((struct ip *, u_int32_t));
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extern const char *ipsec_logsastr __P((struct secasvar *));
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extern void ipsec_dumpmbuf __P((struct mbuf *));
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extern int ipsec4_output __P((struct ipsec_output_state *, struct secpolicy *,
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int));
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extern int ipsec4_tunnel_validate __P((struct mbuf *, int, u_int,
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struct secasvar *));
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extern struct mbuf *ipsec_copypkt __P((struct mbuf *));
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extern void ipsec_delaux __P((struct mbuf *));
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extern int ipsec_addhist __P((struct mbuf *, int, u_int32_t));
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extern int ipsec_getnhist __P((struct mbuf *));
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extern void ipsec_clearhist __P((struct mbuf *));
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#endif /* _KERNEL */
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#ifndef _KERNEL
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extern caddr_t ipsec_set_policy __P((char *, int));
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extern int ipsec_get_policylen __P((caddr_t));
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extern char *ipsec_dump_policy __P((caddr_t, char *));
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extern const char *ipsec_strerror __P((void));
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#endif /* !_KERNEL */
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#endif /* _NETINET6_IPSEC_H_ */
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