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netlabel: Changes to the NetLabel security attributes to allow LSMs to pass full...
[deliverable/linux.git] / include / net / cipso_ipv4.h
CommitLineData
11a03f78
PM		 1/*
2 * CIPSO - Commercial IP Security Option
3 *
4 * This is an implementation of the CIPSO 2.2 protocol as specified in
5 * draft-ietf-cipso-ipsecurity-01.txt with additional tag types as found in
6 * FIPS-188, copies of both documents can be found in the Documentation
7 * directory. While CIPSO never became a full IETF RFC standard many vendors
8 * have chosen to adopt the protocol and over the years it has become a
9 * de-facto standard for labeled networking.
10 *
11 * Author: Paul Moore <paul.moore@hp.com>
12 *
13 */
14
15/*
16 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2 of the License, or
21 * (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
26 * the GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 *
32 */
33
34#ifndef _CIPSO_IPV4_H
35#define _CIPSO_IPV4_H
36
37#include <linux/types.h>
38#include <linux/rcupdate.h>
39#include <linux/list.h>
7a0e1d60
PM		 40#include <linux/net.h>
41#include <linux/skbuff.h>
11a03f78 42#include <net/netlabel.h>
b1edeb10 43#include <asm/atomic.h>
11a03f78
PM		 44
45/* known doi values */
46#define CIPSO_V4_DOI_UNKNOWN 0x00000000
47
48/* tag types */
49#define CIPSO_V4_TAG_INVALID 0
50#define CIPSO_V4_TAG_RBITMAP 1
51#define CIPSO_V4_TAG_ENUM 2
52#define CIPSO_V4_TAG_RANGE 5
53#define CIPSO_V4_TAG_PBITMAP 6
54#define CIPSO_V4_TAG_FREEFORM 7
55
56/* doi mapping types */
57#define CIPSO_V4_MAP_UNKNOWN 0
58#define CIPSO_V4_MAP_STD 1
59#define CIPSO_V4_MAP_PASS 2
60
61/* limits */
c6b1677a 62#define CIPSO_V4_MAX_REM_LVLS 255
11a03f78
PM		 63#define CIPSO_V4_INV_LVL 0x80000000
64#define CIPSO_V4_MAX_LOC_LVLS (CIPSO_V4_INV_LVL - 1)
c6b1677a 65#define CIPSO_V4_MAX_REM_CATS 65534
11a03f78
PM		 66#define CIPSO_V4_INV_CAT 0x80000000
67#define CIPSO_V4_MAX_LOC_CATS (CIPSO_V4_INV_CAT - 1)
68
69/*
70 * CIPSO DOI definitions
71 */
72
73/* DOI definition struct */
74#define CIPSO_V4_TAG_MAXCNT 5
75struct cipso_v4_doi {
76 u32 doi;
77 u32 type;
78 union {
79 struct cipso_v4_std_map_tbl *std;
80 } map;
81 u8 tags[CIPSO_V4_TAG_MAXCNT];
82
b1edeb10 83 atomic_t refcount;
11a03f78
PM		 84 struct list_head list;
85 struct rcu_head rcu;
11a03f78
PM		 86};
87
88/* Standard CIPSO mapping table */
89/* NOTE: the highest order bit (i.e. 0x80000000) is an 'invalid' flag, if the
90 * bit is set then consider that value as unspecified, meaning the
91 * mapping for that particular level/category is invalid */
92struct cipso_v4_std_map_tbl {
93 struct {
94 u32 *cipso;
95 u32 *local;
96 u32 cipso_size;
97 u32 local_size;
98 } lvl;
99 struct {
100 u32 *cipso;
101 u32 *local;
102 u32 cipso_size;
103 u32 local_size;
104 } cat;
105};
106
107/*
108 * Sysctl Variables
109 */
110
111#ifdef CONFIG_NETLABEL
112extern int cipso_v4_cache_enabled;
113extern int cipso_v4_cache_bucketsize;
114extern int cipso_v4_rbm_optfmt;
115extern int cipso_v4_rbm_strictvalid;
116#endif
117
118/*
119 * Helper Functions
120 */
121
122#define CIPSO_V4_OPTEXIST(x) (IPCB(x)->opt.cipso != 0)
d56f90a7 123#define CIPSO_V4_OPTPTR(x) (skb_network_header(x) + IPCB(x)->opt.cipso)
11a03f78
PM		 124
125/*
126 * DOI List Functions
127 */
128
129#ifdef CONFIG_NETLABEL
130int cipso_v4_doi_add(struct cipso_v4_doi *doi_def);
b1edeb10
PM		 131void cipso_v4_doi_free(struct cipso_v4_doi *doi_def);
132int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info);
11a03f78 133struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi);
b1edeb10 134void cipso_v4_doi_putdef(struct cipso_v4_doi *doi_def);
fcd48280
PM		 135int cipso_v4_doi_walk(u32 *skip_cnt,
136 int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
137 void *cb_arg);
11a03f78
PM		 138#else
139static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
140{
141 return -ENOSYS;
142}
143
b1edeb10
PM		 144static inline void cipso_v4_doi_free(struct cipso_v4_doi *doi_def)
145{
146 return;
147}
148
11a03f78 149static inline int cipso_v4_doi_remove(u32 doi,
b1edeb10 150 struct netlbl_audit *audit_info)
11a03f78
PM		 151{
152 return 0;
153}
154
155static inline struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi)
156{
157 return NULL;
158}
159
fcd48280
PM		 160static inline int cipso_v4_doi_walk(u32 *skip_cnt,
161 int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
162 void *cb_arg)
11a03f78 163{
fcd48280 164 return 0;
11a03f78
PM		 165}
166
167static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def,
168 const char *domain)
169{
170 return -ENOSYS;
171}
172
173static inline int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
174 const char *domain)
175{
176 return 0;
177}
178#endif /* CONFIG_NETLABEL */
179
180/*
181 * Label Mapping Cache Functions
182 */
183
184#ifdef CONFIG_NETLABEL
185void cipso_v4_cache_invalidate(void);
186int cipso_v4_cache_add(const struct sk_buff *skb,
187 const struct netlbl_lsm_secattr *secattr);
188#else
189static inline void cipso_v4_cache_invalidate(void)
190{
191 return;
192}
193
194static inline int cipso_v4_cache_add(const struct sk_buff *skb,
195 const struct netlbl_lsm_secattr *secattr)
196{
197 return 0;
198}
199#endif /* CONFIG_NETLABEL */
200
201/*
202 * Protocol Handling Functions
203 */
204
205#ifdef CONFIG_NETLABEL
206void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway);
ba6ff9f2
PM		 207int cipso_v4_sock_setattr(struct sock *sk,
208 const struct cipso_v4_doi *doi_def,
209 const struct netlbl_lsm_secattr *secattr);
014ab19a 210void cipso_v4_sock_delattr(struct sock *sk);
14a72f53 211int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr);
948bf85c
PM		 212int cipso_v4_skbuff_setattr(struct sk_buff *skb,
213 const struct cipso_v4_doi *doi_def,
214 const struct netlbl_lsm_secattr *secattr);
215int cipso_v4_skbuff_delattr(struct sk_buff *skb);
11a03f78
PM		 216int cipso_v4_skbuff_getattr(const struct sk_buff *skb,
217 struct netlbl_lsm_secattr *secattr);
218int cipso_v4_validate(unsigned char **option);
219#else
220static inline void cipso_v4_error(struct sk_buff *skb,
221 int error,
222 u32 gateway)
223{
224 return;
225}
226
ba6ff9f2
PM		 227static inline int cipso_v4_sock_setattr(struct sock *sk,
228 const struct cipso_v4_doi *doi_def,
229 const struct netlbl_lsm_secattr *secattr)
11a03f78
PM		 230{
231 return -ENOSYS;
232}
233
014ab19a
PM		 234static inline void cipso_v4_sock_delattr(struct sock *sk)
235{
236}
237
14a72f53
PM		 238static inline int cipso_v4_sock_getattr(struct sock *sk,
239 struct netlbl_lsm_secattr *secattr)
240{
241 return -ENOSYS;
242}
243
948bf85c
PM		 244static inline int cipso_v4_skbuff_setattr(struct sk_buff *skb,
245 const struct cipso_v4_doi *doi_def,
246 const struct netlbl_lsm_secattr *secattr)
247{
248 return -ENOSYS;
249}
250
251static inline int cipso_v4_skbuff_delattr(struct sk_buff *skb)
252{
253 return -ENOSYS;
254}
255
11a03f78
PM		 256static inline int cipso_v4_skbuff_getattr(const struct sk_buff *skb,
257 struct netlbl_lsm_secattr *secattr)
258{
259 return -ENOSYS;
260}
261
262static inline int cipso_v4_validate(unsigned char **option)
263{
264 return -ENOSYS;
265}
266#endif /* CONFIG_NETLABEL */
267
268#endif /* _CIPSO_IPV4_H */
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