Root/
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@paul-moore.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> |
40 | #include <linux/net.h> |
41 | #include <linux/skbuff.h> |
42 | #include <net/netlabel.h> |
43 | #include <net/request_sock.h> |
44 | #include <linux/atomic.h> |
45 | #include <asm/unaligned.h> |
46 | |
47 | /* known doi values */ |
48 | #define CIPSO_V4_DOI_UNKNOWN 0x00000000 |
49 | |
50 | /* standard tag types */ |
51 | #define CIPSO_V4_TAG_INVALID 0 |
52 | #define CIPSO_V4_TAG_RBITMAP 1 |
53 | #define CIPSO_V4_TAG_ENUM 2 |
54 | #define CIPSO_V4_TAG_RANGE 5 |
55 | #define CIPSO_V4_TAG_PBITMAP 6 |
56 | #define CIPSO_V4_TAG_FREEFORM 7 |
57 | |
58 | /* non-standard tag types (tags > 127) */ |
59 | #define CIPSO_V4_TAG_LOCAL 128 |
60 | |
61 | /* doi mapping types */ |
62 | #define CIPSO_V4_MAP_UNKNOWN 0 |
63 | #define CIPSO_V4_MAP_TRANS 1 |
64 | #define CIPSO_V4_MAP_PASS 2 |
65 | #define CIPSO_V4_MAP_LOCAL 3 |
66 | |
67 | /* limits */ |
68 | #define CIPSO_V4_MAX_REM_LVLS 255 |
69 | #define CIPSO_V4_INV_LVL 0x80000000 |
70 | #define CIPSO_V4_MAX_LOC_LVLS (CIPSO_V4_INV_LVL - 1) |
71 | #define CIPSO_V4_MAX_REM_CATS 65534 |
72 | #define CIPSO_V4_INV_CAT 0x80000000 |
73 | #define CIPSO_V4_MAX_LOC_CATS (CIPSO_V4_INV_CAT - 1) |
74 | |
75 | /* |
76 | * CIPSO DOI definitions |
77 | */ |
78 | |
79 | /* DOI definition struct */ |
80 | #define CIPSO_V4_TAG_MAXCNT 5 |
81 | struct cipso_v4_doi { |
82 | u32 doi; |
83 | u32 type; |
84 | union { |
85 | struct cipso_v4_std_map_tbl *std; |
86 | } map; |
87 | u8 tags[CIPSO_V4_TAG_MAXCNT]; |
88 | |
89 | atomic_t refcount; |
90 | struct list_head list; |
91 | struct rcu_head rcu; |
92 | }; |
93 | |
94 | /* Standard CIPSO mapping table */ |
95 | /* NOTE: the highest order bit (i.e. 0x80000000) is an 'invalid' flag, if the |
96 | * bit is set then consider that value as unspecified, meaning the |
97 | * mapping for that particular level/category is invalid */ |
98 | struct cipso_v4_std_map_tbl { |
99 | struct { |
100 | u32 *cipso; |
101 | u32 *local; |
102 | u32 cipso_size; |
103 | u32 local_size; |
104 | } lvl; |
105 | struct { |
106 | u32 *cipso; |
107 | u32 *local; |
108 | u32 cipso_size; |
109 | u32 local_size; |
110 | } cat; |
111 | }; |
112 | |
113 | /* |
114 | * Sysctl Variables |
115 | */ |
116 | |
117 | #ifdef CONFIG_NETLABEL |
118 | extern int cipso_v4_cache_enabled; |
119 | extern int cipso_v4_cache_bucketsize; |
120 | extern int cipso_v4_rbm_optfmt; |
121 | extern int cipso_v4_rbm_strictvalid; |
122 | #endif |
123 | |
124 | /* |
125 | * Helper Functions |
126 | */ |
127 | |
128 | #define CIPSO_V4_OPTEXIST(x) (IPCB(x)->opt.cipso != 0) |
129 | #define CIPSO_V4_OPTPTR(x) (skb_network_header(x) + IPCB(x)->opt.cipso) |
130 | |
131 | /* |
132 | * DOI List Functions |
133 | */ |
134 | |
135 | #ifdef CONFIG_NETLABEL |
136 | int cipso_v4_doi_add(struct cipso_v4_doi *doi_def, |
137 | struct netlbl_audit *audit_info); |
138 | void cipso_v4_doi_free(struct cipso_v4_doi *doi_def); |
139 | int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info); |
140 | struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi); |
141 | void cipso_v4_doi_putdef(struct cipso_v4_doi *doi_def); |
142 | int cipso_v4_doi_walk(u32 *skip_cnt, |
143 | int (*callback) (struct cipso_v4_doi *doi_def, void *arg), |
144 | void *cb_arg); |
145 | #else |
146 | static inline int cipso_v4_doi_add(struct cipso_v4_doi *doi_def, |
147 | struct netlbl_audit *audit_info) |
148 | { |
149 | return -ENOSYS; |
150 | } |
151 | |
152 | static inline void cipso_v4_doi_free(struct cipso_v4_doi *doi_def) |
153 | { |
154 | return; |
155 | } |
156 | |
157 | static inline int cipso_v4_doi_remove(u32 doi, |
158 | struct netlbl_audit *audit_info) |
159 | { |
160 | return 0; |
161 | } |
162 | |
163 | static inline struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi) |
164 | { |
165 | return NULL; |
166 | } |
167 | |
168 | static inline int cipso_v4_doi_walk(u32 *skip_cnt, |
169 | int (*callback) (struct cipso_v4_doi *doi_def, void *arg), |
170 | void *cb_arg) |
171 | { |
172 | return 0; |
173 | } |
174 | |
175 | static inline int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def, |
176 | const char *domain) |
177 | { |
178 | return -ENOSYS; |
179 | } |
180 | |
181 | static inline int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def, |
182 | const char *domain) |
183 | { |
184 | return 0; |
185 | } |
186 | #endif /* CONFIG_NETLABEL */ |
187 | |
188 | /* |
189 | * Label Mapping Cache Functions |
190 | */ |
191 | |
192 | #ifdef CONFIG_NETLABEL |
193 | void cipso_v4_cache_invalidate(void); |
194 | int cipso_v4_cache_add(const struct sk_buff *skb, |
195 | const struct netlbl_lsm_secattr *secattr); |
196 | #else |
197 | static inline void cipso_v4_cache_invalidate(void) |
198 | { |
199 | return; |
200 | } |
201 | |
202 | static inline int cipso_v4_cache_add(const struct sk_buff *skb, |
203 | const struct netlbl_lsm_secattr *secattr) |
204 | { |
205 | return 0; |
206 | } |
207 | #endif /* CONFIG_NETLABEL */ |
208 | |
209 | /* |
210 | * Protocol Handling Functions |
211 | */ |
212 | |
213 | #ifdef CONFIG_NETLABEL |
214 | void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway); |
215 | int cipso_v4_sock_setattr(struct sock *sk, |
216 | const struct cipso_v4_doi *doi_def, |
217 | const struct netlbl_lsm_secattr *secattr); |
218 | void cipso_v4_sock_delattr(struct sock *sk); |
219 | int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr); |
220 | int cipso_v4_req_setattr(struct request_sock *req, |
221 | const struct cipso_v4_doi *doi_def, |
222 | const struct netlbl_lsm_secattr *secattr); |
223 | void cipso_v4_req_delattr(struct request_sock *req); |
224 | int cipso_v4_skbuff_setattr(struct sk_buff *skb, |
225 | const struct cipso_v4_doi *doi_def, |
226 | const struct netlbl_lsm_secattr *secattr); |
227 | int cipso_v4_skbuff_delattr(struct sk_buff *skb); |
228 | int cipso_v4_skbuff_getattr(const struct sk_buff *skb, |
229 | struct netlbl_lsm_secattr *secattr); |
230 | int cipso_v4_validate(const struct sk_buff *skb, unsigned char **option); |
231 | #else |
232 | static inline void cipso_v4_error(struct sk_buff *skb, |
233 | int error, |
234 | u32 gateway) |
235 | { |
236 | return; |
237 | } |
238 | |
239 | static inline int cipso_v4_sock_setattr(struct sock *sk, |
240 | const struct cipso_v4_doi *doi_def, |
241 | const struct netlbl_lsm_secattr *secattr) |
242 | { |
243 | return -ENOSYS; |
244 | } |
245 | |
246 | static inline void cipso_v4_sock_delattr(struct sock *sk) |
247 | { |
248 | } |
249 | |
250 | static inline int cipso_v4_sock_getattr(struct sock *sk, |
251 | struct netlbl_lsm_secattr *secattr) |
252 | { |
253 | return -ENOSYS; |
254 | } |
255 | |
256 | static inline int cipso_v4_req_setattr(struct request_sock *req, |
257 | const struct cipso_v4_doi *doi_def, |
258 | const struct netlbl_lsm_secattr *secattr) |
259 | { |
260 | return -ENOSYS; |
261 | } |
262 | |
263 | static inline void cipso_v4_req_delattr(struct request_sock *req) |
264 | { |
265 | return; |
266 | } |
267 | |
268 | static inline int cipso_v4_skbuff_setattr(struct sk_buff *skb, |
269 | const struct cipso_v4_doi *doi_def, |
270 | const struct netlbl_lsm_secattr *secattr) |
271 | { |
272 | return -ENOSYS; |
273 | } |
274 | |
275 | static inline int cipso_v4_skbuff_delattr(struct sk_buff *skb) |
276 | { |
277 | return -ENOSYS; |
278 | } |
279 | |
280 | static inline int cipso_v4_skbuff_getattr(const struct sk_buff *skb, |
281 | struct netlbl_lsm_secattr *secattr) |
282 | { |
283 | return -ENOSYS; |
284 | } |
285 | |
286 | static inline int cipso_v4_validate(const struct sk_buff *skb, |
287 | unsigned char **option) |
288 | { |
289 | unsigned char *opt = *option; |
290 | unsigned char err_offset = 0; |
291 | u8 opt_len = opt[1]; |
292 | u8 opt_iter; |
293 | |
294 | if (opt_len < 8) { |
295 | err_offset = 1; |
296 | goto out; |
297 | } |
298 | |
299 | if (get_unaligned_be32(&opt[2]) == 0) { |
300 | err_offset = 2; |
301 | goto out; |
302 | } |
303 | |
304 | for (opt_iter = 6; opt_iter < opt_len;) { |
305 | if (opt[opt_iter + 1] > (opt_len - opt_iter)) { |
306 | err_offset = opt_iter + 1; |
307 | goto out; |
308 | } |
309 | opt_iter += opt[opt_iter + 1]; |
310 | } |
311 | |
312 | out: |
313 | *option = opt + err_offset; |
314 | return err_offset; |
315 | |
316 | } |
317 | #endif /* CONFIG_NETLABEL */ |
318 | |
319 | #endif /* _CIPSO_IPV4_H */ |
320 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9