1/*
 2 * CALIPSO - Common Architecture Label IPv6 Security Option
 3 *
 4 * This is an implementation of the CALIPSO protocol as specified in
 5 * RFC 5570.
 6 *
 7 * Authors: Paul Moore <paul@paul-moore.com>
 8 *          Huw Davies <huw@codeweavers.com>
 9 *
10 */
11
12/*
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
14 * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
15 *
16 * This program is free software;  you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
24 * the GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program;  if not, see <http://www.gnu.org/licenses/>.
28 *
29 */
30
31#ifndef _CALIPSO_H
32#define _CALIPSO_H
33
34#include <linux/types.h>
35#include <linux/rcupdate.h>
36#include <linux/list.h>
37#include <linux/net.h>
38#include <linux/skbuff.h>
39#include <net/netlabel.h>
40#include <net/request_sock.h>
41#include <linux/atomic.h>
42#include <asm/unaligned.h>
43
44/* known doi values */
45#define CALIPSO_DOI_UNKNOWN          0x00000000
46
47/* doi mapping types */
48#define CALIPSO_MAP_UNKNOWN          0
49#define CALIPSO_MAP_PASS             2
50
51/*
52 * CALIPSO DOI definitions
53 */
54
55/* DOI definition struct */
56struct calipso_doi {
57	u32 doi;
58	u32 type;
59
60	atomic_t refcount;
61	struct list_head list;
62	struct rcu_head rcu;
63};
64
65/*
66 * Sysctl Variables
67 */
68extern int calipso_cache_enabled;
69extern int calipso_cache_bucketsize;
70
71#ifdef CONFIG_NETLABEL
72int __init calipso_init(void);
73void calipso_exit(void);
74bool calipso_validate(const struct sk_buff *skb, const unsigned char *option);
75#else
76static inline int __init calipso_init(void)
77{
78	return 0;
79}
80
81static inline void calipso_exit(void)
82{
83}
84static inline bool calipso_validate(const struct sk_buff *skb,
85				    const unsigned char *option)
86{
87	return true;
88}
89#endif /* CONFIG_NETLABEL */
90
91#endif /* _CALIPSO_H */