1/*	$KAME: policy.h,v 1.18 2001/10/02 04:10:17 sakane 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#include <sys/queue.h>
33
34/* refs. ipsec.h */
35/*
36 * Security Policy Index
37 * NOTE: Ensure to be same address family and upper layer protocol.
38 * NOTE: ul_proto, port number, uid, gid:
39 *	ANY: reserved for waldcard.
40 *	0 to (~0 - 1): is one of the number of each value.
41 */
42struct policyindex {
43	u_int8_t dir;			/* direction of packet flow, see blow */
44	struct sockaddr_storage src;	/* IP src address for SP */
45	struct sockaddr_storage dst;	/* IP dst address for SP */
46	u_int8_t prefs;			/* prefix length in bits for src */
47	u_int8_t prefd;			/* prefix length in bits for dst */
48	u_int16_t ul_proto;		/* upper layer Protocol */
49};
50
51/* Security Policy Data Base */
52struct secpolicy {
53	TAILQ_ENTRY(secpolicy) chain;
54
55	struct policyindex spidx;	/* selector */
56	u_int32_t id;			/* It's unique number on the system. */
57
58	u_int policy;		/* DISCARD, NONE or IPSEC, see keyv2.h */
59	struct ipsecrequest *req;
60				/* pointer to the ipsec request tree, */
61				/* if policy == IPSEC else this value == NULL.*/
62};
63
64/* Security Assocciation Index */
65/* NOTE: Ensure to be same address family */
66struct secasindex {
67	struct sockaddr_storage src;	/* srouce address for SA */
68	struct sockaddr_storage dst;	/* destination address for SA */
69	u_int16_t proto;		/* IPPROTO_ESP or IPPROTO_AH */
70	u_int8_t mode;			/* mode of protocol, see ipsec.h */
71	u_int32_t reqid;		/* reqid id who owned this SA */
72					/* see IPSEC_MANUAL_REQID_MAX. */
73};
74
75/* Request for IPsec */
76struct ipsecrequest {
77	struct ipsecrequest *next;
78				/* pointer to next structure */
79				/* If NULL, it means the end of chain. */
80
81	struct secasindex saidx;/* hint for search proper SA */
82				/* if __ss_len == 0 then no address specified.*/
83	u_int level;		/* IPsec level defined below. */
84
85	struct secpolicy *sp;	/* back pointer to SP */
86};
87
88#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx)                        \
89do {                                                                         \
90	bzero((idx), sizeof(struct policyindex));                            \
91	(idx)->dir = (_dir);                                                 \
92	(idx)->prefs = (ps);                                                 \
93	(idx)->prefd = (pd);                                                 \
94	(idx)->ul_proto = (ulp);                                             \
95	memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
96	memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
97} while (0)
98
99struct ph2handle;
100struct policyindex;
101extern struct secpolicy *getsp __P((struct policyindex *));
102extern struct secpolicy *getsp_r __P((struct policyindex *));
103struct secpolicy *getspbyspid __P((u_int32_t));
104extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *));
105extern int cmpspidxwild __P((struct policyindex *, struct policyindex *));
106extern struct secpolicy *newsp __P((void));
107extern void delsp __P((struct secpolicy *));
108extern void delsp_bothdir __P((struct policyindex *));
109extern void inssp __P((struct secpolicy *));
110extern void remsp __P((struct secpolicy *));
111extern void flushsp __P((void));
112extern void initsp __P((void));
113extern struct ipsecrequest *newipsecreq __P((void));
114
115extern const char *spidx2str __P((const struct policyindex *));
116