]>
Commit | Line | Data |
---|---|---|
cb72d382 HD |
1 | /* |
2 | * NetLabel CALIPSO/IPv6 Support | |
3 | * | |
4 | * This file defines the CALIPSO/IPv6 functions for the NetLabel system. The | |
5 | * NetLabel system manages static and dynamic label mappings for network | |
6 | * protocols such as CIPSO and CALIPSO. | |
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 | * 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 | #include <linux/types.h> | |
32 | #include <linux/socket.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/audit.h> | |
36 | #include <linux/slab.h> | |
37 | #include <net/sock.h> | |
38 | #include <net/netlink.h> | |
39 | #include <net/genetlink.h> | |
40 | #include <net/netlabel.h> | |
41 | #include <net/calipso.h> | |
42 | #include <linux/atomic.h> | |
43 | ||
44 | #include "netlabel_user.h" | |
45 | #include "netlabel_calipso.h" | |
46 | #include "netlabel_mgmt.h" | |
47 | #include "netlabel_domainhash.h" | |
48 | ||
e1ce69df HD |
49 | /* Argument struct for calipso_doi_walk() */ |
50 | struct netlbl_calipso_doiwalk_arg { | |
51 | struct netlink_callback *nl_cb; | |
52 | struct sk_buff *skb; | |
53 | u32 seq; | |
54 | }; | |
55 | ||
d7cce015 HD |
56 | /* Argument struct for netlbl_domhsh_walk() */ |
57 | struct netlbl_domhsh_walk_arg { | |
58 | struct netlbl_audit *audit_info; | |
59 | u32 doi; | |
60 | }; | |
61 | ||
cb72d382 | 62 | /* NetLabel Generic NETLINK CALIPSO family */ |
489111e5 | 63 | static struct genl_family netlbl_calipso_gnl_family; |
cb72d382 HD |
64 | |
65 | /* NetLabel Netlink attribute policy */ | |
66 | static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = { | |
67 | [NLBL_CALIPSO_A_DOI] = { .type = NLA_U32 }, | |
68 | [NLBL_CALIPSO_A_MTYPE] = { .type = NLA_U32 }, | |
69 | }; | |
70 | ||
71 | /* NetLabel Command Handlers | |
72 | */ | |
73 | /** | |
74 | * netlbl_calipso_add_pass - Adds a CALIPSO pass DOI definition | |
75 | * @info: the Generic NETLINK info block | |
76 | * @audit_info: NetLabel audit information | |
77 | * | |
78 | * Description: | |
79 | * Create a new CALIPSO_MAP_PASS DOI definition based on the given ADD message | |
80 | * and add it to the CALIPSO engine. Return zero on success and non-zero on | |
81 | * error. | |
82 | * | |
83 | */ | |
84 | static int netlbl_calipso_add_pass(struct genl_info *info, | |
85 | struct netlbl_audit *audit_info) | |
86 | { | |
87 | int ret_val; | |
88 | struct calipso_doi *doi_def = NULL; | |
89 | ||
90 | doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); | |
91 | if (!doi_def) | |
92 | return -ENOMEM; | |
93 | doi_def->type = CALIPSO_MAP_PASS; | |
94 | doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
95 | ret_val = calipso_doi_add(doi_def, audit_info); | |
96 | if (ret_val != 0) | |
97 | calipso_doi_free(doi_def); | |
98 | ||
99 | return ret_val; | |
100 | } | |
101 | ||
102 | /** | |
103 | * netlbl_calipso_add - Handle an ADD message | |
104 | * @skb: the NETLINK buffer | |
105 | * @info: the Generic NETLINK info block | |
106 | * | |
107 | * Description: | |
108 | * Create a new DOI definition based on the given ADD message and add it to the | |
109 | * CALIPSO engine. Returns zero on success, negative values on failure. | |
110 | * | |
111 | */ | |
112 | static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info) | |
113 | ||
114 | { | |
115 | int ret_val = -EINVAL; | |
116 | struct netlbl_audit audit_info; | |
117 | ||
118 | if (!info->attrs[NLBL_CALIPSO_A_DOI] || | |
119 | !info->attrs[NLBL_CALIPSO_A_MTYPE]) | |
120 | return -EINVAL; | |
121 | ||
122 | netlbl_netlink_auditinfo(skb, &audit_info); | |
123 | switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) { | |
124 | case CALIPSO_MAP_PASS: | |
125 | ret_val = netlbl_calipso_add_pass(info, &audit_info); | |
126 | break; | |
127 | } | |
128 | if (ret_val == 0) | |
129 | atomic_inc(&netlabel_mgmt_protocount); | |
130 | ||
131 | return ret_val; | |
132 | } | |
133 | ||
a5e34490 HD |
134 | /** |
135 | * netlbl_calipso_list - Handle a LIST message | |
136 | * @skb: the NETLINK buffer | |
137 | * @info: the Generic NETLINK info block | |
138 | * | |
139 | * Description: | |
140 | * Process a user generated LIST message and respond accordingly. | |
141 | * Returns zero on success and negative values on error. | |
142 | * | |
143 | */ | |
144 | static int netlbl_calipso_list(struct sk_buff *skb, struct genl_info *info) | |
145 | { | |
146 | int ret_val; | |
147 | struct sk_buff *ans_skb = NULL; | |
148 | void *data; | |
149 | u32 doi; | |
150 | struct calipso_doi *doi_def; | |
151 | ||
152 | if (!info->attrs[NLBL_CALIPSO_A_DOI]) { | |
153 | ret_val = -EINVAL; | |
154 | goto list_failure; | |
155 | } | |
156 | ||
157 | doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
158 | ||
159 | doi_def = calipso_doi_getdef(doi); | |
160 | if (!doi_def) { | |
161 | ret_val = -EINVAL; | |
162 | goto list_failure; | |
163 | } | |
164 | ||
165 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
166 | if (!ans_skb) { | |
167 | ret_val = -ENOMEM; | |
168 | goto list_failure_put; | |
169 | } | |
170 | data = genlmsg_put_reply(ans_skb, info, &netlbl_calipso_gnl_family, | |
171 | 0, NLBL_CALIPSO_C_LIST); | |
172 | if (!data) { | |
173 | ret_val = -ENOMEM; | |
174 | goto list_failure_put; | |
175 | } | |
176 | ||
177 | ret_val = nla_put_u32(ans_skb, NLBL_CALIPSO_A_MTYPE, doi_def->type); | |
178 | if (ret_val != 0) | |
179 | goto list_failure_put; | |
180 | ||
181 | calipso_doi_putdef(doi_def); | |
182 | ||
183 | genlmsg_end(ans_skb, data); | |
184 | return genlmsg_reply(ans_skb, info); | |
185 | ||
186 | list_failure_put: | |
187 | calipso_doi_putdef(doi_def); | |
188 | list_failure: | |
189 | kfree_skb(ans_skb); | |
190 | return ret_val; | |
191 | } | |
192 | ||
e1ce69df HD |
193 | /** |
194 | * netlbl_calipso_listall_cb - calipso_doi_walk() callback for LISTALL | |
195 | * @doi_def: the CALIPSO DOI definition | |
196 | * @arg: the netlbl_calipso_doiwalk_arg structure | |
197 | * | |
198 | * Description: | |
199 | * This function is designed to be used as a callback to the | |
200 | * calipso_doi_walk() function for use in generating a response for a LISTALL | |
201 | * message. Returns the size of the message on success, negative values on | |
202 | * failure. | |
203 | * | |
204 | */ | |
205 | static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg) | |
206 | { | |
207 | int ret_val = -ENOMEM; | |
208 | struct netlbl_calipso_doiwalk_arg *cb_arg = arg; | |
209 | void *data; | |
210 | ||
211 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, | |
212 | cb_arg->seq, &netlbl_calipso_gnl_family, | |
213 | NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL); | |
214 | if (!data) | |
215 | goto listall_cb_failure; | |
216 | ||
217 | ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi); | |
218 | if (ret_val != 0) | |
219 | goto listall_cb_failure; | |
220 | ret_val = nla_put_u32(cb_arg->skb, | |
221 | NLBL_CALIPSO_A_MTYPE, | |
222 | doi_def->type); | |
223 | if (ret_val != 0) | |
224 | goto listall_cb_failure; | |
225 | ||
226 | genlmsg_end(cb_arg->skb, data); | |
227 | return 0; | |
228 | ||
229 | listall_cb_failure: | |
230 | genlmsg_cancel(cb_arg->skb, data); | |
231 | return ret_val; | |
232 | } | |
233 | ||
234 | /** | |
235 | * netlbl_calipso_listall - Handle a LISTALL message | |
236 | * @skb: the NETLINK buffer | |
237 | * @cb: the NETLINK callback | |
238 | * | |
239 | * Description: | |
240 | * Process a user generated LISTALL message and respond accordingly. Returns | |
241 | * zero on success and negative values on error. | |
242 | * | |
243 | */ | |
244 | static int netlbl_calipso_listall(struct sk_buff *skb, | |
245 | struct netlink_callback *cb) | |
246 | { | |
247 | struct netlbl_calipso_doiwalk_arg cb_arg; | |
248 | u32 doi_skip = cb->args[0]; | |
249 | ||
250 | cb_arg.nl_cb = cb; | |
251 | cb_arg.skb = skb; | |
252 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
253 | ||
254 | calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg); | |
255 | ||
256 | cb->args[0] = doi_skip; | |
257 | return skb->len; | |
258 | } | |
259 | ||
d7cce015 HD |
260 | /** |
261 | * netlbl_calipso_remove_cb - netlbl_calipso_remove() callback for REMOVE | |
262 | * @entry: LSM domain mapping entry | |
263 | * @arg: the netlbl_domhsh_walk_arg structure | |
264 | * | |
265 | * Description: | |
266 | * This function is intended for use by netlbl_calipso_remove() as the callback | |
267 | * for the netlbl_domhsh_walk() function; it removes LSM domain map entries | |
268 | * which are associated with the CALIPSO DOI specified in @arg. Returns zero on | |
269 | * success, negative values on failure. | |
270 | * | |
271 | */ | |
272 | static int netlbl_calipso_remove_cb(struct netlbl_dom_map *entry, void *arg) | |
273 | { | |
274 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
275 | ||
276 | if (entry->def.type == NETLBL_NLTYPE_CALIPSO && | |
277 | entry->def.calipso->doi == cb_arg->doi) | |
278 | return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | /** | |
284 | * netlbl_calipso_remove - Handle a REMOVE message | |
285 | * @skb: the NETLINK buffer | |
286 | * @info: the Generic NETLINK info block | |
287 | * | |
288 | * Description: | |
289 | * Process a user generated REMOVE message and respond accordingly. Returns | |
290 | * zero on success, negative values on failure. | |
291 | * | |
292 | */ | |
293 | static int netlbl_calipso_remove(struct sk_buff *skb, struct genl_info *info) | |
294 | { | |
295 | int ret_val = -EINVAL; | |
296 | struct netlbl_domhsh_walk_arg cb_arg; | |
297 | struct netlbl_audit audit_info; | |
298 | u32 skip_bkt = 0; | |
299 | u32 skip_chain = 0; | |
300 | ||
301 | if (!info->attrs[NLBL_CALIPSO_A_DOI]) | |
302 | return -EINVAL; | |
303 | ||
304 | netlbl_netlink_auditinfo(skb, &audit_info); | |
305 | cb_arg.doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
306 | cb_arg.audit_info = &audit_info; | |
307 | ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain, | |
308 | netlbl_calipso_remove_cb, &cb_arg); | |
309 | if (ret_val == 0 || ret_val == -ENOENT) { | |
310 | ret_val = calipso_doi_remove(cb_arg.doi, &audit_info); | |
311 | if (ret_val == 0) | |
312 | atomic_dec(&netlabel_mgmt_protocount); | |
313 | } | |
314 | ||
315 | return ret_val; | |
316 | } | |
317 | ||
cb72d382 HD |
318 | /* NetLabel Generic NETLINK Command Definitions |
319 | */ | |
320 | ||
321 | static const struct genl_ops netlbl_calipso_ops[] = { | |
322 | { | |
323 | .cmd = NLBL_CALIPSO_C_ADD, | |
324 | .flags = GENL_ADMIN_PERM, | |
325 | .policy = calipso_genl_policy, | |
326 | .doit = netlbl_calipso_add, | |
327 | .dumpit = NULL, | |
328 | }, | |
a5e34490 | 329 | { |
d7cce015 HD |
330 | .cmd = NLBL_CALIPSO_C_REMOVE, |
331 | .flags = GENL_ADMIN_PERM, | |
332 | .policy = calipso_genl_policy, | |
333 | .doit = netlbl_calipso_remove, | |
334 | .dumpit = NULL, | |
335 | }, | |
336 | { | |
a5e34490 HD |
337 | .cmd = NLBL_CALIPSO_C_LIST, |
338 | .flags = 0, | |
339 | .policy = calipso_genl_policy, | |
340 | .doit = netlbl_calipso_list, | |
341 | .dumpit = NULL, | |
342 | }, | |
e1ce69df HD |
343 | { |
344 | .cmd = NLBL_CALIPSO_C_LISTALL, | |
345 | .flags = 0, | |
346 | .policy = calipso_genl_policy, | |
347 | .doit = NULL, | |
348 | .dumpit = netlbl_calipso_listall, | |
349 | }, | |
cb72d382 HD |
350 | }; |
351 | ||
56989f6d | 352 | static struct genl_family netlbl_calipso_gnl_family __ro_after_init = { |
489111e5 JB |
353 | .hdrsize = 0, |
354 | .name = NETLBL_NLTYPE_CALIPSO_NAME, | |
355 | .version = NETLBL_PROTO_VERSION, | |
356 | .maxattr = NLBL_CALIPSO_A_MAX, | |
357 | .module = THIS_MODULE, | |
358 | .ops = netlbl_calipso_ops, | |
359 | .n_ops = ARRAY_SIZE(netlbl_calipso_ops), | |
360 | }; | |
361 | ||
cb72d382 HD |
362 | /* NetLabel Generic NETLINK Protocol Functions |
363 | */ | |
364 | ||
365 | /** | |
366 | * netlbl_calipso_genl_init - Register the CALIPSO NetLabel component | |
367 | * | |
368 | * Description: | |
369 | * Register the CALIPSO packet NetLabel component with the Generic NETLINK | |
370 | * mechanism. Returns zero on success, negative values on failure. | |
371 | * | |
372 | */ | |
373 | int __init netlbl_calipso_genl_init(void) | |
374 | { | |
489111e5 | 375 | return genl_register_family(&netlbl_calipso_gnl_family); |
cb72d382 HD |
376 | } |
377 | ||
378 | static const struct netlbl_calipso_ops *calipso_ops; | |
379 | ||
380 | /** | |
381 | * netlbl_calipso_ops_register - Register the CALIPSO operations | |
382 | * | |
383 | * Description: | |
384 | * Register the CALIPSO packet engine operations. | |
385 | * | |
386 | */ | |
387 | const struct netlbl_calipso_ops * | |
388 | netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops) | |
389 | { | |
390 | return xchg(&calipso_ops, ops); | |
391 | } | |
392 | EXPORT_SYMBOL(netlbl_calipso_ops_register); | |
393 | ||
394 | static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void) | |
395 | { | |
6aa7de05 | 396 | return READ_ONCE(calipso_ops); |
cb72d382 HD |
397 | } |
398 | ||
399 | /** | |
400 | * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine | |
401 | * @doi_def: the DOI structure | |
402 | * @audit_info: NetLabel audit information | |
403 | * | |
404 | * Description: | |
405 | * The caller defines a new DOI for use by the CALIPSO engine and calls this | |
406 | * function to add it to the list of acceptable domains. The caller must | |
407 | * ensure that the mapping table specified in @doi_def->map meets all of the | |
408 | * requirements of the mapping type (see calipso.h for details). Returns | |
409 | * zero on success and non-zero on failure. | |
410 | * | |
411 | */ | |
412 | int calipso_doi_add(struct calipso_doi *doi_def, | |
413 | struct netlbl_audit *audit_info) | |
414 | { | |
415 | int ret_val = -ENOMSG; | |
416 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
417 | ||
418 | if (ops) | |
419 | ret_val = ops->doi_add(doi_def, audit_info); | |
420 | return ret_val; | |
421 | } | |
422 | ||
423 | /** | |
424 | * calipso_doi_free - Frees a DOI definition | |
425 | * @doi_def: the DOI definition | |
426 | * | |
427 | * Description: | |
428 | * This function frees all of the memory associated with a DOI definition. | |
429 | * | |
430 | */ | |
431 | void calipso_doi_free(struct calipso_doi *doi_def) | |
432 | { | |
433 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
434 | ||
435 | if (ops) | |
436 | ops->doi_free(doi_def); | |
437 | } | |
a5e34490 | 438 | |
d7cce015 HD |
439 | /** |
440 | * calipso_doi_remove - Remove an existing DOI from the CALIPSO protocol engine | |
441 | * @doi: the DOI value | |
442 | * @audit_secid: the LSM secid to use in the audit message | |
443 | * | |
444 | * Description: | |
445 | * Removes a DOI definition from the CALIPSO engine. The NetLabel routines will | |
446 | * be called to release their own LSM domain mappings as well as our own | |
447 | * domain list. Returns zero on success and negative values on failure. | |
448 | * | |
449 | */ | |
450 | int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info) | |
451 | { | |
452 | int ret_val = -ENOMSG; | |
453 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
454 | ||
455 | if (ops) | |
456 | ret_val = ops->doi_remove(doi, audit_info); | |
457 | return ret_val; | |
458 | } | |
459 | ||
a5e34490 HD |
460 | /** |
461 | * calipso_doi_getdef - Returns a reference to a valid DOI definition | |
462 | * @doi: the DOI value | |
463 | * | |
464 | * Description: | |
465 | * Searches for a valid DOI definition and if one is found it is returned to | |
466 | * the caller. Otherwise NULL is returned. The caller must ensure that | |
467 | * calipso_doi_putdef() is called when the caller is done. | |
468 | * | |
469 | */ | |
470 | struct calipso_doi *calipso_doi_getdef(u32 doi) | |
471 | { | |
472 | struct calipso_doi *ret_val = NULL; | |
473 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
474 | ||
475 | if (ops) | |
476 | ret_val = ops->doi_getdef(doi); | |
477 | return ret_val; | |
478 | } | |
479 | ||
480 | /** | |
481 | * calipso_doi_putdef - Releases a reference for the given DOI definition | |
482 | * @doi_def: the DOI definition | |
483 | * | |
484 | * Description: | |
485 | * Releases a DOI definition reference obtained from calipso_doi_getdef(). | |
486 | * | |
487 | */ | |
488 | void calipso_doi_putdef(struct calipso_doi *doi_def) | |
489 | { | |
490 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
491 | ||
492 | if (ops) | |
493 | ops->doi_putdef(doi_def); | |
494 | } | |
e1ce69df HD |
495 | |
496 | /** | |
497 | * calipso_doi_walk - Iterate through the DOI definitions | |
498 | * @skip_cnt: skip past this number of DOI definitions, updated | |
499 | * @callback: callback for each DOI definition | |
500 | * @cb_arg: argument for the callback function | |
501 | * | |
502 | * Description: | |
503 | * Iterate over the DOI definition list, skipping the first @skip_cnt entries. | |
504 | * For each entry call @callback, if @callback returns a negative value stop | |
505 | * 'walking' through the list and return. Updates the value in @skip_cnt upon | |
506 | * return. Returns zero on success, negative values on failure. | |
507 | * | |
508 | */ | |
509 | int calipso_doi_walk(u32 *skip_cnt, | |
510 | int (*callback)(struct calipso_doi *doi_def, void *arg), | |
511 | void *cb_arg) | |
512 | { | |
513 | int ret_val = -ENOMSG; | |
514 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
515 | ||
516 | if (ops) | |
517 | ret_val = ops->doi_walk(skip_cnt, callback, cb_arg); | |
518 | return ret_val; | |
519 | } | |
ceba1832 HD |
520 | |
521 | /** | |
522 | * calipso_sock_getattr - Get the security attributes from a sock | |
523 | * @sk: the sock | |
524 | * @secattr: the security attributes | |
525 | * | |
526 | * Description: | |
527 | * Query @sk to see if there is a CALIPSO option attached to the sock and if | |
528 | * there is return the CALIPSO security attributes in @secattr. This function | |
529 | * requires that @sk be locked, or privately held, but it does not do any | |
530 | * locking itself. Returns zero on success and negative values on failure. | |
531 | * | |
532 | */ | |
533 | int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr) | |
534 | { | |
535 | int ret_val = -ENOMSG; | |
536 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
537 | ||
538 | if (ops) | |
539 | ret_val = ops->sock_getattr(sk, secattr); | |
540 | return ret_val; | |
541 | } | |
542 | ||
543 | /** | |
544 | * calipso_sock_setattr - Add a CALIPSO option to a socket | |
545 | * @sk: the socket | |
546 | * @doi_def: the CALIPSO DOI to use | |
547 | * @secattr: the specific security attributes of the socket | |
548 | * | |
549 | * Description: | |
550 | * Set the CALIPSO option on the given socket using the DOI definition and | |
551 | * security attributes passed to the function. This function requires | |
552 | * exclusive access to @sk, which means it either needs to be in the | |
553 | * process of being created or locked. Returns zero on success and negative | |
554 | * values on failure. | |
555 | * | |
556 | */ | |
557 | int calipso_sock_setattr(struct sock *sk, | |
558 | const struct calipso_doi *doi_def, | |
559 | const struct netlbl_lsm_secattr *secattr) | |
560 | { | |
561 | int ret_val = -ENOMSG; | |
562 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
563 | ||
564 | if (ops) | |
565 | ret_val = ops->sock_setattr(sk, doi_def, secattr); | |
566 | return ret_val; | |
567 | } | |
568 | ||
569 | /** | |
570 | * calipso_sock_delattr - Delete the CALIPSO option from a socket | |
571 | * @sk: the socket | |
572 | * | |
573 | * Description: | |
574 | * Removes the CALIPSO option from a socket, if present. | |
575 | * | |
576 | */ | |
577 | void calipso_sock_delattr(struct sock *sk) | |
578 | { | |
579 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
580 | ||
581 | if (ops) | |
582 | ops->sock_delattr(sk); | |
583 | } | |
e1adea92 HD |
584 | |
585 | /** | |
586 | * calipso_req_setattr - Add a CALIPSO option to a connection request socket | |
587 | * @req: the connection request socket | |
588 | * @doi_def: the CALIPSO DOI to use | |
589 | * @secattr: the specific security attributes of the socket | |
590 | * | |
591 | * Description: | |
592 | * Set the CALIPSO option on the given socket using the DOI definition and | |
593 | * security attributes passed to the function. Returns zero on success and | |
594 | * negative values on failure. | |
595 | * | |
596 | */ | |
597 | int calipso_req_setattr(struct request_sock *req, | |
598 | const struct calipso_doi *doi_def, | |
599 | const struct netlbl_lsm_secattr *secattr) | |
600 | { | |
601 | int ret_val = -ENOMSG; | |
602 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
603 | ||
604 | if (ops) | |
605 | ret_val = ops->req_setattr(req, doi_def, secattr); | |
606 | return ret_val; | |
607 | } | |
608 | ||
609 | /** | |
610 | * calipso_req_delattr - Delete the CALIPSO option from a request socket | |
611 | * @reg: the request socket | |
612 | * | |
613 | * Description: | |
614 | * Removes the CALIPSO option from a request socket, if present. | |
615 | * | |
616 | */ | |
617 | void calipso_req_delattr(struct request_sock *req) | |
618 | { | |
619 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
620 | ||
621 | if (ops) | |
622 | ops->req_delattr(req); | |
623 | } | |
2917f57b HD |
624 | |
625 | /** | |
626 | * calipso_optptr - Find the CALIPSO option in the packet | |
627 | * @skb: the packet | |
628 | * | |
629 | * Description: | |
630 | * Parse the packet's IP header looking for a CALIPSO option. Returns a pointer | |
631 | * to the start of the CALIPSO option on success, NULL if one if not found. | |
632 | * | |
633 | */ | |
634 | unsigned char *calipso_optptr(const struct sk_buff *skb) | |
635 | { | |
636 | unsigned char *ret_val = NULL; | |
637 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
638 | ||
639 | if (ops) | |
640 | ret_val = ops->skbuff_optptr(skb); | |
641 | return ret_val; | |
642 | } | |
643 | ||
644 | /** | |
645 | * calipso_getattr - Get the security attributes from a memory block. | |
646 | * @calipso: the CALIPSO option | |
647 | * @secattr: the security attributes | |
648 | * | |
649 | * Description: | |
650 | * Inspect @calipso and return the security attributes in @secattr. | |
651 | * Returns zero on success and negative values on failure. | |
652 | * | |
653 | */ | |
654 | int calipso_getattr(const unsigned char *calipso, | |
655 | struct netlbl_lsm_secattr *secattr) | |
656 | { | |
657 | int ret_val = -ENOMSG; | |
658 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
659 | ||
660 | if (ops) | |
661 | ret_val = ops->opt_getattr(calipso, secattr); | |
662 | return ret_val; | |
663 | } | |
664 | ||
665 | /** | |
666 | * calipso_skbuff_setattr - Set the CALIPSO option on a packet | |
667 | * @skb: the packet | |
668 | * @doi_def: the CALIPSO DOI to use | |
669 | * @secattr: the security attributes | |
670 | * | |
671 | * Description: | |
672 | * Set the CALIPSO option on the given packet based on the security attributes. | |
673 | * Returns a pointer to the IP header on success and NULL on failure. | |
674 | * | |
675 | */ | |
676 | int calipso_skbuff_setattr(struct sk_buff *skb, | |
677 | const struct calipso_doi *doi_def, | |
678 | const struct netlbl_lsm_secattr *secattr) | |
679 | { | |
680 | int ret_val = -ENOMSG; | |
681 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
682 | ||
683 | if (ops) | |
684 | ret_val = ops->skbuff_setattr(skb, doi_def, secattr); | |
685 | return ret_val; | |
686 | } | |
687 | ||
688 | /** | |
689 | * calipso_skbuff_delattr - Delete any CALIPSO options from a packet | |
690 | * @skb: the packet | |
691 | * | |
692 | * Description: | |
693 | * Removes any and all CALIPSO options from the given packet. Returns zero on | |
694 | * success, negative values on failure. | |
695 | * | |
696 | */ | |
697 | int calipso_skbuff_delattr(struct sk_buff *skb) | |
698 | { | |
699 | int ret_val = -ENOMSG; | |
700 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
701 | ||
702 | if (ops) | |
703 | ret_val = ops->skbuff_delattr(skb); | |
704 | return ret_val; | |
705 | } | |
4fee5242 HD |
706 | |
707 | /** | |
708 | * calipso_cache_invalidate - Invalidates the current CALIPSO cache | |
709 | * | |
710 | * Description: | |
711 | * Invalidates and frees any entries in the CALIPSO cache. Returns zero on | |
712 | * success and negative values on failure. | |
713 | * | |
714 | */ | |
715 | void calipso_cache_invalidate(void) | |
716 | { | |
717 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
718 | ||
719 | if (ops) | |
720 | ops->cache_invalidate(); | |
721 | } | |
722 | ||
723 | /** | |
724 | * calipso_cache_add - Add an entry to the CALIPSO cache | |
725 | * @calipso_ptr: the CALIPSO option | |
726 | * @secattr: the packet's security attributes | |
727 | * | |
728 | * Description: | |
729 | * Add a new entry into the CALIPSO label mapping cache. | |
730 | * Returns zero on success, negative values on failure. | |
731 | * | |
732 | */ | |
733 | int calipso_cache_add(const unsigned char *calipso_ptr, | |
734 | const struct netlbl_lsm_secattr *secattr) | |
735 | ||
736 | { | |
737 | int ret_val = -ENOMSG; | |
738 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
739 | ||
740 | if (ops) | |
741 | ret_val = ops->cache_add(calipso_ptr, secattr); | |
742 | return ret_val; | |
743 | } |