1/* $Id: policy.h,v 1.5 2004/06/11 16:00:17 ludvigm 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#ifndef _POLICY_H
33#define _POLICY_H
34
35#include "racoon_types.h"
36#include <sys/queue.h>
37
38/* refs. ipsec.h */
39/*
40 * Security Policy Index
41 * NOTE: Ensure to be same address family and upper layer protocol.
42 * NOTE: ul_proto, port number, uid, gid:
43 *	ANY: reserved for waldcard.
44 *	0 to (~0 - 1): is one of the number of each value.
45 */
46struct policyindex {
47	u_int8_t dir;			/* direction of packet flow, see blow */
48	struct sockaddr_storage src;	/* IP src address for SP */
49	struct sockaddr_storage dst;	/* IP dst address for SP */
50	u_int8_t prefs;			/* prefix length in bits for src */
51	u_int8_t prefd;			/* prefix length in bits for dst */
52	u_int16_t ul_proto;		/* upper layer Protocol */
53	u_int32_t priority;		/* priority for the policy */
54};
55
56/* Security Policy Data Base */
57struct secpolicy {
58	TAILQ_ENTRY(secpolicy) chain;
59
60	struct policyindex spidx;	/* selector */
61	u_int32_t id;			/* It's unique number on the system. */
62
63	u_int policy;		/* DISCARD, NONE or IPSEC, see keyv2.h */
64	struct ipsecrequest *req;
65				/* pointer to the ipsec request tree, */
66				/* if policy == IPSEC else this value == NULL.*/
67};
68
69/* Security Assocciation Index */
70/* NOTE: Ensure to be same address family */
71struct secasindex {
72	struct sockaddr_storage src;	/* srouce address for SA */
73	struct sockaddr_storage dst;	/* destination address for SA */
74	u_int16_t proto;		/* IPPROTO_ESP or IPPROTO_AH */
75	u_int8_t mode;			/* mode of protocol, see ipsec.h */
76	u_int32_t reqid;		/* reqid id who owned this SA */
77					/* see IPSEC_MANUAL_REQID_MAX. */
78};
79
80/* Request for IPsec */
81struct ipsecrequest {
82	struct ipsecrequest *next;
83				/* pointer to next structure */
84				/* If NULL, it means the end of chain. */
85
86	struct secasindex saidx;/* hint for search proper SA */
87				/* if __ss_len == 0 then no address specified.*/
88	u_int level;		/* IPsec level defined below. */
89
90	struct secpolicy *sp;	/* back pointer to SP */
91};
92
93#ifdef HAVE_PFKEY_POLICY_PRIORITY
94#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _priority, idx)              \
95do {                                                                         \
96	bzero((idx), sizeof(struct policyindex));                            \
97	(idx)->dir = (_dir);                                                 \
98	(idx)->prefs = (ps);                                                 \
99	(idx)->prefd = (pd);                                                 \
100	(idx)->ul_proto = (ulp);                                             \
101	(idx)->priority = (_priority);                                        \
102	memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
103	memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
104} while (0)
105#else
106#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx)              \
107do {                                                                         \
108	bzero((idx), sizeof(struct policyindex));                            \
109	(idx)->dir = (_dir);                                                 \
110	(idx)->prefs = (ps);                                                 \
111	(idx)->prefd = (pd);                                                 \
112	(idx)->ul_proto = (ulp);                                             \
113	memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
114	memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
115} while (0)
116#endif
117
118
119struct policyindex;
120extern struct secpolicy *getsp (struct policyindex *);
121extern struct secpolicy *getsp_r (struct policyindex *, phase2_handle_t *);
122struct secpolicy *getspbyspid (u_int32_t);
123extern int cmpspidxstrict (struct policyindex *, struct policyindex *);
124extern int cmpspidxwild (struct policyindex *, struct policyindex *);
125extern struct secpolicy *newsp (void);
126extern void delsp (struct secpolicy *);
127extern void delsp_bothdir (struct policyindex *);
128extern void inssp (struct secpolicy *);
129extern void remsp (struct secpolicy *);
130extern void flushsp (void);
131extern void initsp (void);
132extern struct ipsecrequest *newipsecreq (void);
133extern int policies_installed (void);
134
135extern const char *spidx2str (const struct policyindex *);
136
137#endif /* _POLICY_H */
138