1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * CALIPSO - Common Architecture Label IPv6 Security Option
 4 *
 5 * This is an implementation of the CALIPSO protocol as specified in
 6 * RFC 5570.
 7 *
 8 * Authors: Paul Moore <paul@paul-moore.com>
 9 *          Huw Davies <huw@codeweavers.com>
10 */
11
12/*
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
14 * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
15 */
16
17#ifndef _CALIPSO_H
18#define _CALIPSO_H
19
20#include <linux/types.h>
21#include <linux/rcupdate.h>
22#include <linux/list.h>
23#include <linux/net.h>
24#include <linux/skbuff.h>
25#include <net/netlabel.h>
26#include <net/request_sock.h>
27#include <linux/refcount.h>
28#include <linux/unaligned.h>
29
30/* known doi values */
31#define CALIPSO_DOI_UNKNOWN          0x00000000
32
33/* doi mapping types */
34#define CALIPSO_MAP_UNKNOWN          0
35#define CALIPSO_MAP_PASS             2
36
37/*
38 * CALIPSO DOI definitions
39 */
40
41/* DOI definition struct */
42struct calipso_doi {
43	u32 doi;
44	u32 type;
45
46	refcount_t refcount;
47	struct list_head list;
48	struct rcu_head rcu;
49};
50
51/*
52 * Sysctl Variables
53 */
54extern int calipso_cache_enabled;
55extern int calipso_cache_bucketsize;
56
57#ifdef CONFIG_NETLABEL
58int __init calipso_init(void);
59void calipso_exit(void);
60bool calipso_validate(const struct sk_buff *skb, const unsigned char *option);
61#else
62static inline int __init calipso_init(void)
63{
64	return 0;
65}
66
67static inline void calipso_exit(void)
68{
69}
70static inline bool calipso_validate(const struct sk_buff *skb,
71				    const unsigned char *option)
72{
73	return true;
74}
75#endif /* CONFIG_NETLABEL */
76
77#endif /* _CALIPSO_H */