2 * CIPSO - Commercial IP Security Option
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.
11 * Author: Paul Moore <paul.moore@hp.com>
16 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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.
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.
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
37 #include <linux/types.h>
38 #include <linux/rcupdate.h>
39 #include <linux/list.h>
40 #include <linux/net.h>
41 #include <linux/skbuff.h>
42 #include <net/netlabel.h>
43 #include <asm/atomic.h>
45 /* known doi values */
46 #define CIPSO_V4_DOI_UNKNOWN 0x00000000
48 /* standard 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
56 /* non-standard tag types (tags > 127) */
57 #define CIPSO_V4_TAG_LOCAL 128
59 /* doi mapping types */
60 #define CIPSO_V4_MAP_UNKNOWN 0
61 #define CIPSO_V4_MAP_TRANS 1
62 #define CIPSO_V4_MAP_PASS 2
63 #define CIPSO_V4_MAP_LOCAL 3
66 #define CIPSO_V4_MAX_REM_LVLS 255
67 #define CIPSO_V4_INV_LVL 0x80000000
68 #define CIPSO_V4_MAX_LOC_LVLS (CIPSO_V4_INV_LVL - 1)
69 #define CIPSO_V4_MAX_REM_CATS 65534
70 #define CIPSO_V4_INV_CAT 0x80000000
71 #define CIPSO_V4_MAX_LOC_CATS (CIPSO_V4_INV_CAT - 1)
74 * CIPSO DOI definitions
77 /* DOI definition struct */
78 #define CIPSO_V4_TAG_MAXCNT 5
83 struct cipso_v4_std_map_tbl *std;
85 u8 tags[CIPSO_V4_TAG_MAXCNT];
88 struct list_head list;
92 /* Standard CIPSO mapping table */
93 /* NOTE: the highest order bit (i.e. 0x80000000) is an 'invalid' flag, if the
94 * bit is set then consider that value as unspecified, meaning the
95 * mapping for that particular level/category is invalid */
96 struct cipso_v4_std_map_tbl {
115 #ifdef CONFIG_NETLABEL
116 extern int cipso_v4_cache_enabled;
117 extern int cipso_v4_cache_bucketsize;
118 extern int cipso_v4_rbm_optfmt;
119 extern int cipso_v4_rbm_strictvalid;
126 #define CIPSO_V4_OPTEXIST(x) (IPCB(x)->opt.cipso != 0)
127 #define CIPSO_V4_OPTPTR(x) (skb_network_header(x) + IPCB(x)->opt.cipso)
133 #ifdef CONFIG_NETLABEL
134 int cipso_v4_doi_add(struct cipso_v4_doi *doi_def);
135 void cipso_v4_doi_free(struct cipso_v4_doi *doi_def);
136 int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info);
137 struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi);
138 void cipso_v4_doi_putdef(struct cipso_v4_doi *doi_def);
139 int cipso_v4_doi_walk(u32 *skip_cnt,
140 int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
143 static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
148 static inline void cipso_v4_doi_free(struct cipso_v4_doi *doi_def)
153 static inline int cipso_v4_doi_remove(u32 doi,
154 struct netlbl_audit *audit_info)
159 static inline struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi)
164 static inline int cipso_v4_doi_walk(u32 *skip_cnt,
165 int (*callback) (struct cipso_v4_doi *doi_def, void *arg),
171 static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def,
177 static inline int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
182 #endif /* CONFIG_NETLABEL */
185 * Label Mapping Cache Functions
188 #ifdef CONFIG_NETLABEL
189 void cipso_v4_cache_invalidate(void);
190 int cipso_v4_cache_add(const struct sk_buff *skb,
191 const struct netlbl_lsm_secattr *secattr);
193 static inline void cipso_v4_cache_invalidate(void)
198 static inline int cipso_v4_cache_add(const struct sk_buff *skb,
199 const struct netlbl_lsm_secattr *secattr)
203 #endif /* CONFIG_NETLABEL */
206 * Protocol Handling Functions
209 #ifdef CONFIG_NETLABEL
210 void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway);
211 int cipso_v4_sock_setattr(struct sock *sk,
212 const struct cipso_v4_doi *doi_def,
213 const struct netlbl_lsm_secattr *secattr);
214 void cipso_v4_sock_delattr(struct sock *sk);
215 int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr);
216 int cipso_v4_skbuff_setattr(struct sk_buff *skb,
217 const struct cipso_v4_doi *doi_def,
218 const struct netlbl_lsm_secattr *secattr);
219 int cipso_v4_skbuff_delattr(struct sk_buff *skb);
220 int cipso_v4_skbuff_getattr(const struct sk_buff *skb,
221 struct netlbl_lsm_secattr *secattr);
222 int cipso_v4_validate(const struct sk_buff *skb, unsigned char **option);
224 static inline void cipso_v4_error(struct sk_buff *skb,
231 static inline int cipso_v4_sock_setattr(struct sock *sk,
232 const struct cipso_v4_doi *doi_def,
233 const struct netlbl_lsm_secattr *secattr)
238 static inline void cipso_v4_sock_delattr(struct sock *sk)
242 static inline int cipso_v4_sock_getattr(struct sock *sk,
243 struct netlbl_lsm_secattr *secattr)
248 static inline int cipso_v4_skbuff_setattr(struct sk_buff *skb,
249 const struct cipso_v4_doi *doi_def,
250 const struct netlbl_lsm_secattr *secattr)
255 static inline int cipso_v4_skbuff_delattr(struct sk_buff *skb)
260 static inline int cipso_v4_skbuff_getattr(const struct sk_buff *skb,
261 struct netlbl_lsm_secattr *secattr)
266 static inline int cipso_v4_validate(const struct sk_buff *skb,
267 unsigned char **option)
271 #endif /* CONFIG_NETLABEL */
273 #endif /* _CIPSO_IPV4_H */