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1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
cb72d382 HD |
2 | /* |
3 | * NetLabel CALIPSO/IPv6 Support | |
4 | * | |
5 | * This file defines the CALIPSO/IPv6 functions for the NetLabel system. The | |
6 | * NetLabel system manages static and dynamic label mappings for network | |
7 | * protocols such as CIPSO and CALIPSO. | |
8 | * | |
9 | * Authors: Paul Moore <paul@paul-moore.com> | |
10 | * Huw Davies <huw@codeweavers.com> | |
cb72d382 HD |
11 | */ |
12 | ||
13 | /* (c) Copyright Hewlett-Packard Development Company, L.P., 2006 | |
14 | * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015 | |
cb72d382 HD |
15 | */ |
16 | ||
17 | #include <linux/types.h> | |
18 | #include <linux/socket.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/skbuff.h> | |
21 | #include <linux/audit.h> | |
22 | #include <linux/slab.h> | |
23 | #include <net/sock.h> | |
24 | #include <net/netlink.h> | |
25 | #include <net/genetlink.h> | |
26 | #include <net/netlabel.h> | |
27 | #include <net/calipso.h> | |
28 | #include <linux/atomic.h> | |
29 | ||
30 | #include "netlabel_user.h" | |
31 | #include "netlabel_calipso.h" | |
32 | #include "netlabel_mgmt.h" | |
33 | #include "netlabel_domainhash.h" | |
34 | ||
e1ce69df HD |
35 | /* Argument struct for calipso_doi_walk() */ |
36 | struct netlbl_calipso_doiwalk_arg { | |
37 | struct netlink_callback *nl_cb; | |
38 | struct sk_buff *skb; | |
39 | u32 seq; | |
40 | }; | |
41 | ||
d7cce015 HD |
42 | /* Argument struct for netlbl_domhsh_walk() */ |
43 | struct netlbl_domhsh_walk_arg { | |
44 | struct netlbl_audit *audit_info; | |
45 | u32 doi; | |
46 | }; | |
47 | ||
cb72d382 | 48 | /* NetLabel Generic NETLINK CALIPSO family */ |
489111e5 | 49 | static struct genl_family netlbl_calipso_gnl_family; |
cb72d382 HD |
50 | |
51 | /* NetLabel Netlink attribute policy */ | |
52 | static const struct nla_policy calipso_genl_policy[NLBL_CALIPSO_A_MAX + 1] = { | |
53 | [NLBL_CALIPSO_A_DOI] = { .type = NLA_U32 }, | |
54 | [NLBL_CALIPSO_A_MTYPE] = { .type = NLA_U32 }, | |
55 | }; | |
56 | ||
ec4e9d63 GI |
57 | static const struct netlbl_calipso_ops *calipso_ops; |
58 | ||
59 | /** | |
60 | * netlbl_calipso_ops_register - Register the CALIPSO operations | |
61 | * @ops: ops to register | |
62 | * | |
63 | * Description: | |
64 | * Register the CALIPSO packet engine operations. | |
65 | * | |
66 | */ | |
67 | const struct netlbl_calipso_ops * | |
68 | netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops) | |
69 | { | |
70 | return xchg(&calipso_ops, ops); | |
71 | } | |
72 | EXPORT_SYMBOL(netlbl_calipso_ops_register); | |
73 | ||
74 | static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void) | |
75 | { | |
76 | return READ_ONCE(calipso_ops); | |
77 | } | |
78 | ||
cb72d382 HD |
79 | /* NetLabel Command Handlers |
80 | */ | |
81 | /** | |
82 | * netlbl_calipso_add_pass - Adds a CALIPSO pass DOI definition | |
83 | * @info: the Generic NETLINK info block | |
84 | * @audit_info: NetLabel audit information | |
85 | * | |
86 | * Description: | |
87 | * Create a new CALIPSO_MAP_PASS DOI definition based on the given ADD message | |
88 | * and add it to the CALIPSO engine. Return zero on success and non-zero on | |
89 | * error. | |
90 | * | |
91 | */ | |
92 | static int netlbl_calipso_add_pass(struct genl_info *info, | |
93 | struct netlbl_audit *audit_info) | |
94 | { | |
95 | int ret_val; | |
96 | struct calipso_doi *doi_def = NULL; | |
97 | ||
98 | doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); | |
99 | if (!doi_def) | |
100 | return -ENOMEM; | |
101 | doi_def->type = CALIPSO_MAP_PASS; | |
102 | doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
103 | ret_val = calipso_doi_add(doi_def, audit_info); | |
104 | if (ret_val != 0) | |
105 | calipso_doi_free(doi_def); | |
106 | ||
107 | return ret_val; | |
108 | } | |
109 | ||
110 | /** | |
111 | * netlbl_calipso_add - Handle an ADD message | |
112 | * @skb: the NETLINK buffer | |
113 | * @info: the Generic NETLINK info block | |
114 | * | |
115 | * Description: | |
116 | * Create a new DOI definition based on the given ADD message and add it to the | |
117 | * CALIPSO engine. Returns zero on success, negative values on failure. | |
118 | * | |
119 | */ | |
120 | static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info) | |
cb72d382 HD |
121 | { |
122 | int ret_val = -EINVAL; | |
123 | struct netlbl_audit audit_info; | |
ec4e9d63 | 124 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); |
cb72d382 HD |
125 | |
126 | if (!info->attrs[NLBL_CALIPSO_A_DOI] || | |
127 | !info->attrs[NLBL_CALIPSO_A_MTYPE]) | |
128 | return -EINVAL; | |
129 | ||
ec4e9d63 GI |
130 | if (!ops) |
131 | return -EOPNOTSUPP; | |
132 | ||
f7e0318a | 133 | netlbl_netlink_auditinfo(&audit_info); |
cb72d382 HD |
134 | switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) { |
135 | case CALIPSO_MAP_PASS: | |
136 | ret_val = netlbl_calipso_add_pass(info, &audit_info); | |
137 | break; | |
138 | } | |
139 | if (ret_val == 0) | |
140 | atomic_inc(&netlabel_mgmt_protocount); | |
141 | ||
142 | return ret_val; | |
143 | } | |
144 | ||
a5e34490 HD |
145 | /** |
146 | * netlbl_calipso_list - Handle a LIST message | |
147 | * @skb: the NETLINK buffer | |
148 | * @info: the Generic NETLINK info block | |
149 | * | |
150 | * Description: | |
151 | * Process a user generated LIST message and respond accordingly. | |
152 | * Returns zero on success and negative values on error. | |
153 | * | |
154 | */ | |
155 | static int netlbl_calipso_list(struct sk_buff *skb, struct genl_info *info) | |
156 | { | |
157 | int ret_val; | |
158 | struct sk_buff *ans_skb = NULL; | |
159 | void *data; | |
160 | u32 doi; | |
161 | struct calipso_doi *doi_def; | |
162 | ||
163 | if (!info->attrs[NLBL_CALIPSO_A_DOI]) { | |
164 | ret_val = -EINVAL; | |
165 | goto list_failure; | |
166 | } | |
167 | ||
168 | doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
169 | ||
170 | doi_def = calipso_doi_getdef(doi); | |
171 | if (!doi_def) { | |
172 | ret_val = -EINVAL; | |
173 | goto list_failure; | |
174 | } | |
175 | ||
176 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
177 | if (!ans_skb) { | |
178 | ret_val = -ENOMEM; | |
179 | goto list_failure_put; | |
180 | } | |
181 | data = genlmsg_put_reply(ans_skb, info, &netlbl_calipso_gnl_family, | |
182 | 0, NLBL_CALIPSO_C_LIST); | |
183 | if (!data) { | |
184 | ret_val = -ENOMEM; | |
185 | goto list_failure_put; | |
186 | } | |
187 | ||
188 | ret_val = nla_put_u32(ans_skb, NLBL_CALIPSO_A_MTYPE, doi_def->type); | |
189 | if (ret_val != 0) | |
190 | goto list_failure_put; | |
191 | ||
192 | calipso_doi_putdef(doi_def); | |
193 | ||
194 | genlmsg_end(ans_skb, data); | |
195 | return genlmsg_reply(ans_skb, info); | |
196 | ||
197 | list_failure_put: | |
198 | calipso_doi_putdef(doi_def); | |
199 | list_failure: | |
200 | kfree_skb(ans_skb); | |
201 | return ret_val; | |
202 | } | |
203 | ||
e1ce69df HD |
204 | /** |
205 | * netlbl_calipso_listall_cb - calipso_doi_walk() callback for LISTALL | |
206 | * @doi_def: the CALIPSO DOI definition | |
207 | * @arg: the netlbl_calipso_doiwalk_arg structure | |
208 | * | |
209 | * Description: | |
210 | * This function is designed to be used as a callback to the | |
211 | * calipso_doi_walk() function for use in generating a response for a LISTALL | |
212 | * message. Returns the size of the message on success, negative values on | |
213 | * failure. | |
214 | * | |
215 | */ | |
216 | static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg) | |
217 | { | |
218 | int ret_val = -ENOMEM; | |
219 | struct netlbl_calipso_doiwalk_arg *cb_arg = arg; | |
220 | void *data; | |
221 | ||
222 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, | |
223 | cb_arg->seq, &netlbl_calipso_gnl_family, | |
224 | NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL); | |
225 | if (!data) | |
226 | goto listall_cb_failure; | |
227 | ||
228 | ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi); | |
229 | if (ret_val != 0) | |
230 | goto listall_cb_failure; | |
231 | ret_val = nla_put_u32(cb_arg->skb, | |
232 | NLBL_CALIPSO_A_MTYPE, | |
233 | doi_def->type); | |
234 | if (ret_val != 0) | |
235 | goto listall_cb_failure; | |
236 | ||
237 | genlmsg_end(cb_arg->skb, data); | |
238 | return 0; | |
239 | ||
240 | listall_cb_failure: | |
241 | genlmsg_cancel(cb_arg->skb, data); | |
242 | return ret_val; | |
243 | } | |
244 | ||
245 | /** | |
246 | * netlbl_calipso_listall - Handle a LISTALL message | |
247 | * @skb: the NETLINK buffer | |
248 | * @cb: the NETLINK callback | |
249 | * | |
250 | * Description: | |
251 | * Process a user generated LISTALL message and respond accordingly. Returns | |
252 | * zero on success and negative values on error. | |
253 | * | |
254 | */ | |
255 | static int netlbl_calipso_listall(struct sk_buff *skb, | |
256 | struct netlink_callback *cb) | |
257 | { | |
258 | struct netlbl_calipso_doiwalk_arg cb_arg; | |
259 | u32 doi_skip = cb->args[0]; | |
260 | ||
261 | cb_arg.nl_cb = cb; | |
262 | cb_arg.skb = skb; | |
263 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
264 | ||
265 | calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg); | |
266 | ||
267 | cb->args[0] = doi_skip; | |
268 | return skb->len; | |
269 | } | |
270 | ||
d7cce015 HD |
271 | /** |
272 | * netlbl_calipso_remove_cb - netlbl_calipso_remove() callback for REMOVE | |
273 | * @entry: LSM domain mapping entry | |
274 | * @arg: the netlbl_domhsh_walk_arg structure | |
275 | * | |
276 | * Description: | |
277 | * This function is intended for use by netlbl_calipso_remove() as the callback | |
278 | * for the netlbl_domhsh_walk() function; it removes LSM domain map entries | |
279 | * which are associated with the CALIPSO DOI specified in @arg. Returns zero on | |
280 | * success, negative values on failure. | |
281 | * | |
282 | */ | |
283 | static int netlbl_calipso_remove_cb(struct netlbl_dom_map *entry, void *arg) | |
284 | { | |
285 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
286 | ||
287 | if (entry->def.type == NETLBL_NLTYPE_CALIPSO && | |
288 | entry->def.calipso->doi == cb_arg->doi) | |
289 | return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | /** | |
295 | * netlbl_calipso_remove - Handle a REMOVE message | |
296 | * @skb: the NETLINK buffer | |
297 | * @info: the Generic NETLINK info block | |
298 | * | |
299 | * Description: | |
300 | * Process a user generated REMOVE message and respond accordingly. Returns | |
301 | * zero on success, negative values on failure. | |
302 | * | |
303 | */ | |
304 | static int netlbl_calipso_remove(struct sk_buff *skb, struct genl_info *info) | |
305 | { | |
306 | int ret_val = -EINVAL; | |
307 | struct netlbl_domhsh_walk_arg cb_arg; | |
308 | struct netlbl_audit audit_info; | |
309 | u32 skip_bkt = 0; | |
310 | u32 skip_chain = 0; | |
311 | ||
312 | if (!info->attrs[NLBL_CALIPSO_A_DOI]) | |
313 | return -EINVAL; | |
314 | ||
f7e0318a | 315 | netlbl_netlink_auditinfo(&audit_info); |
d7cce015 HD |
316 | cb_arg.doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); |
317 | cb_arg.audit_info = &audit_info; | |
318 | ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain, | |
319 | netlbl_calipso_remove_cb, &cb_arg); | |
320 | if (ret_val == 0 || ret_val == -ENOENT) { | |
321 | ret_val = calipso_doi_remove(cb_arg.doi, &audit_info); | |
322 | if (ret_val == 0) | |
323 | atomic_dec(&netlabel_mgmt_protocount); | |
324 | } | |
325 | ||
326 | return ret_val; | |
327 | } | |
328 | ||
cb72d382 HD |
329 | /* NetLabel Generic NETLINK Command Definitions |
330 | */ | |
331 | ||
66a9b928 | 332 | static const struct genl_small_ops netlbl_calipso_ops[] = { |
cb72d382 HD |
333 | { |
334 | .cmd = NLBL_CALIPSO_C_ADD, | |
ef6243ac | 335 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
cb72d382 | 336 | .flags = GENL_ADMIN_PERM, |
cb72d382 HD |
337 | .doit = netlbl_calipso_add, |
338 | .dumpit = NULL, | |
339 | }, | |
a5e34490 | 340 | { |
d7cce015 | 341 | .cmd = NLBL_CALIPSO_C_REMOVE, |
ef6243ac | 342 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d7cce015 | 343 | .flags = GENL_ADMIN_PERM, |
d7cce015 HD |
344 | .doit = netlbl_calipso_remove, |
345 | .dumpit = NULL, | |
346 | }, | |
347 | { | |
a5e34490 | 348 | .cmd = NLBL_CALIPSO_C_LIST, |
ef6243ac | 349 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
a5e34490 | 350 | .flags = 0, |
a5e34490 HD |
351 | .doit = netlbl_calipso_list, |
352 | .dumpit = NULL, | |
353 | }, | |
e1ce69df HD |
354 | { |
355 | .cmd = NLBL_CALIPSO_C_LISTALL, | |
ef6243ac | 356 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
e1ce69df | 357 | .flags = 0, |
e1ce69df HD |
358 | .doit = NULL, |
359 | .dumpit = netlbl_calipso_listall, | |
360 | }, | |
cb72d382 HD |
361 | }; |
362 | ||
56989f6d | 363 | static struct genl_family netlbl_calipso_gnl_family __ro_after_init = { |
489111e5 JB |
364 | .hdrsize = 0, |
365 | .name = NETLBL_NLTYPE_CALIPSO_NAME, | |
366 | .version = NETLBL_PROTO_VERSION, | |
367 | .maxattr = NLBL_CALIPSO_A_MAX, | |
3b0f31f2 | 368 | .policy = calipso_genl_policy, |
489111e5 | 369 | .module = THIS_MODULE, |
66a9b928 JK |
370 | .small_ops = netlbl_calipso_ops, |
371 | .n_small_ops = ARRAY_SIZE(netlbl_calipso_ops), | |
9c5d03d3 | 372 | .resv_start_op = NLBL_CALIPSO_C_LISTALL + 1, |
489111e5 JB |
373 | }; |
374 | ||
cb72d382 HD |
375 | /* NetLabel Generic NETLINK Protocol Functions |
376 | */ | |
377 | ||
378 | /** | |
379 | * netlbl_calipso_genl_init - Register the CALIPSO NetLabel component | |
380 | * | |
381 | * Description: | |
382 | * Register the CALIPSO packet NetLabel component with the Generic NETLINK | |
383 | * mechanism. Returns zero on success, negative values on failure. | |
384 | * | |
385 | */ | |
386 | int __init netlbl_calipso_genl_init(void) | |
387 | { | |
489111e5 | 388 | return genl_register_family(&netlbl_calipso_gnl_family); |
cb72d382 HD |
389 | } |
390 | ||
cb72d382 HD |
391 | /** |
392 | * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine | |
393 | * @doi_def: the DOI structure | |
394 | * @audit_info: NetLabel audit information | |
395 | * | |
396 | * Description: | |
397 | * The caller defines a new DOI for use by the CALIPSO engine and calls this | |
398 | * function to add it to the list of acceptable domains. The caller must | |
399 | * ensure that the mapping table specified in @doi_def->map meets all of the | |
400 | * requirements of the mapping type (see calipso.h for details). Returns | |
401 | * zero on success and non-zero on failure. | |
402 | * | |
403 | */ | |
404 | int calipso_doi_add(struct calipso_doi *doi_def, | |
405 | struct netlbl_audit *audit_info) | |
406 | { | |
407 | int ret_val = -ENOMSG; | |
408 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
409 | ||
410 | if (ops) | |
411 | ret_val = ops->doi_add(doi_def, audit_info); | |
412 | return ret_val; | |
413 | } | |
414 | ||
415 | /** | |
416 | * calipso_doi_free - Frees a DOI definition | |
417 | * @doi_def: the DOI definition | |
418 | * | |
419 | * Description: | |
420 | * This function frees all of the memory associated with a DOI definition. | |
421 | * | |
422 | */ | |
423 | void calipso_doi_free(struct calipso_doi *doi_def) | |
424 | { | |
425 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
426 | ||
427 | if (ops) | |
428 | ops->doi_free(doi_def); | |
429 | } | |
a5e34490 | 430 | |
d7cce015 HD |
431 | /** |
432 | * calipso_doi_remove - Remove an existing DOI from the CALIPSO protocol engine | |
433 | * @doi: the DOI value | |
8c70b268 | 434 | * @audit_info: NetLabel audit information |
d7cce015 HD |
435 | * |
436 | * Description: | |
437 | * Removes a DOI definition from the CALIPSO engine. The NetLabel routines will | |
438 | * be called to release their own LSM domain mappings as well as our own | |
439 | * domain list. Returns zero on success and negative values on failure. | |
440 | * | |
441 | */ | |
442 | int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info) | |
443 | { | |
444 | int ret_val = -ENOMSG; | |
445 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
446 | ||
447 | if (ops) | |
448 | ret_val = ops->doi_remove(doi, audit_info); | |
449 | return ret_val; | |
450 | } | |
451 | ||
a5e34490 HD |
452 | /** |
453 | * calipso_doi_getdef - Returns a reference to a valid DOI definition | |
454 | * @doi: the DOI value | |
455 | * | |
456 | * Description: | |
457 | * Searches for a valid DOI definition and if one is found it is returned to | |
458 | * the caller. Otherwise NULL is returned. The caller must ensure that | |
459 | * calipso_doi_putdef() is called when the caller is done. | |
460 | * | |
461 | */ | |
462 | struct calipso_doi *calipso_doi_getdef(u32 doi) | |
463 | { | |
464 | struct calipso_doi *ret_val = NULL; | |
465 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
466 | ||
467 | if (ops) | |
468 | ret_val = ops->doi_getdef(doi); | |
469 | return ret_val; | |
470 | } | |
471 | ||
472 | /** | |
473 | * calipso_doi_putdef - Releases a reference for the given DOI definition | |
474 | * @doi_def: the DOI definition | |
475 | * | |
476 | * Description: | |
477 | * Releases a DOI definition reference obtained from calipso_doi_getdef(). | |
478 | * | |
479 | */ | |
480 | void calipso_doi_putdef(struct calipso_doi *doi_def) | |
481 | { | |
482 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
483 | ||
484 | if (ops) | |
485 | ops->doi_putdef(doi_def); | |
486 | } | |
e1ce69df HD |
487 | |
488 | /** | |
489 | * calipso_doi_walk - Iterate through the DOI definitions | |
490 | * @skip_cnt: skip past this number of DOI definitions, updated | |
491 | * @callback: callback for each DOI definition | |
492 | * @cb_arg: argument for the callback function | |
493 | * | |
494 | * Description: | |
495 | * Iterate over the DOI definition list, skipping the first @skip_cnt entries. | |
496 | * For each entry call @callback, if @callback returns a negative value stop | |
497 | * 'walking' through the list and return. Updates the value in @skip_cnt upon | |
498 | * return. Returns zero on success, negative values on failure. | |
499 | * | |
500 | */ | |
501 | int calipso_doi_walk(u32 *skip_cnt, | |
502 | int (*callback)(struct calipso_doi *doi_def, void *arg), | |
503 | void *cb_arg) | |
504 | { | |
505 | int ret_val = -ENOMSG; | |
506 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
507 | ||
508 | if (ops) | |
509 | ret_val = ops->doi_walk(skip_cnt, callback, cb_arg); | |
510 | return ret_val; | |
511 | } | |
ceba1832 HD |
512 | |
513 | /** | |
514 | * calipso_sock_getattr - Get the security attributes from a sock | |
515 | * @sk: the sock | |
516 | * @secattr: the security attributes | |
517 | * | |
518 | * Description: | |
519 | * Query @sk to see if there is a CALIPSO option attached to the sock and if | |
520 | * there is return the CALIPSO security attributes in @secattr. This function | |
521 | * requires that @sk be locked, or privately held, but it does not do any | |
522 | * locking itself. Returns zero on success and negative values on failure. | |
523 | * | |
524 | */ | |
525 | int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr) | |
526 | { | |
527 | int ret_val = -ENOMSG; | |
528 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
529 | ||
530 | if (ops) | |
531 | ret_val = ops->sock_getattr(sk, secattr); | |
532 | return ret_val; | |
533 | } | |
534 | ||
535 | /** | |
536 | * calipso_sock_setattr - Add a CALIPSO option to a socket | |
537 | * @sk: the socket | |
538 | * @doi_def: the CALIPSO DOI to use | |
539 | * @secattr: the specific security attributes of the socket | |
540 | * | |
541 | * Description: | |
542 | * Set the CALIPSO option on the given socket using the DOI definition and | |
543 | * security attributes passed to the function. This function requires | |
544 | * exclusive access to @sk, which means it either needs to be in the | |
545 | * process of being created or locked. Returns zero on success and negative | |
546 | * values on failure. | |
547 | * | |
548 | */ | |
549 | int calipso_sock_setattr(struct sock *sk, | |
550 | const struct calipso_doi *doi_def, | |
551 | const struct netlbl_lsm_secattr *secattr) | |
552 | { | |
553 | int ret_val = -ENOMSG; | |
554 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
555 | ||
556 | if (ops) | |
557 | ret_val = ops->sock_setattr(sk, doi_def, secattr); | |
558 | return ret_val; | |
559 | } | |
560 | ||
561 | /** | |
562 | * calipso_sock_delattr - Delete the CALIPSO option from a socket | |
563 | * @sk: the socket | |
564 | * | |
565 | * Description: | |
566 | * Removes the CALIPSO option from a socket, if present. | |
567 | * | |
568 | */ | |
569 | void calipso_sock_delattr(struct sock *sk) | |
570 | { | |
571 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
572 | ||
573 | if (ops) | |
574 | ops->sock_delattr(sk); | |
575 | } | |
e1adea92 HD |
576 | |
577 | /** | |
578 | * calipso_req_setattr - Add a CALIPSO option to a connection request socket | |
579 | * @req: the connection request socket | |
580 | * @doi_def: the CALIPSO DOI to use | |
581 | * @secattr: the specific security attributes of the socket | |
582 | * | |
583 | * Description: | |
584 | * Set the CALIPSO option on the given socket using the DOI definition and | |
585 | * security attributes passed to the function. Returns zero on success and | |
586 | * negative values on failure. | |
587 | * | |
588 | */ | |
589 | int calipso_req_setattr(struct request_sock *req, | |
590 | const struct calipso_doi *doi_def, | |
591 | const struct netlbl_lsm_secattr *secattr) | |
592 | { | |
593 | int ret_val = -ENOMSG; | |
594 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
595 | ||
596 | if (ops) | |
597 | ret_val = ops->req_setattr(req, doi_def, secattr); | |
598 | return ret_val; | |
599 | } | |
600 | ||
601 | /** | |
602 | * calipso_req_delattr - Delete the CALIPSO option from a request socket | |
8c70b268 | 603 | * @req: the request socket |
e1adea92 HD |
604 | * |
605 | * Description: | |
606 | * Removes the CALIPSO option from a request socket, if present. | |
607 | * | |
608 | */ | |
609 | void calipso_req_delattr(struct request_sock *req) | |
610 | { | |
611 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
612 | ||
613 | if (ops) | |
614 | ops->req_delattr(req); | |
615 | } | |
2917f57b HD |
616 | |
617 | /** | |
618 | * calipso_optptr - Find the CALIPSO option in the packet | |
619 | * @skb: the packet | |
620 | * | |
621 | * Description: | |
622 | * Parse the packet's IP header looking for a CALIPSO option. Returns a pointer | |
623 | * to the start of the CALIPSO option on success, NULL if one if not found. | |
624 | * | |
625 | */ | |
626 | unsigned char *calipso_optptr(const struct sk_buff *skb) | |
627 | { | |
628 | unsigned char *ret_val = NULL; | |
629 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
630 | ||
631 | if (ops) | |
632 | ret_val = ops->skbuff_optptr(skb); | |
633 | return ret_val; | |
634 | } | |
635 | ||
636 | /** | |
637 | * calipso_getattr - Get the security attributes from a memory block. | |
638 | * @calipso: the CALIPSO option | |
639 | * @secattr: the security attributes | |
640 | * | |
641 | * Description: | |
642 | * Inspect @calipso and return the security attributes in @secattr. | |
643 | * Returns zero on success and negative values on failure. | |
644 | * | |
645 | */ | |
646 | int calipso_getattr(const unsigned char *calipso, | |
647 | struct netlbl_lsm_secattr *secattr) | |
648 | { | |
649 | int ret_val = -ENOMSG; | |
650 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
651 | ||
652 | if (ops) | |
653 | ret_val = ops->opt_getattr(calipso, secattr); | |
654 | return ret_val; | |
655 | } | |
656 | ||
657 | /** | |
658 | * calipso_skbuff_setattr - Set the CALIPSO option on a packet | |
659 | * @skb: the packet | |
660 | * @doi_def: the CALIPSO DOI to use | |
661 | * @secattr: the security attributes | |
662 | * | |
663 | * Description: | |
664 | * Set the CALIPSO option on the given packet based on the security attributes. | |
665 | * Returns a pointer to the IP header on success and NULL on failure. | |
666 | * | |
667 | */ | |
668 | int calipso_skbuff_setattr(struct sk_buff *skb, | |
669 | const struct calipso_doi *doi_def, | |
670 | const struct netlbl_lsm_secattr *secattr) | |
671 | { | |
672 | int ret_val = -ENOMSG; | |
673 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
674 | ||
675 | if (ops) | |
676 | ret_val = ops->skbuff_setattr(skb, doi_def, secattr); | |
677 | return ret_val; | |
678 | } | |
679 | ||
680 | /** | |
681 | * calipso_skbuff_delattr - Delete any CALIPSO options from a packet | |
682 | * @skb: the packet | |
683 | * | |
684 | * Description: | |
685 | * Removes any and all CALIPSO options from the given packet. Returns zero on | |
686 | * success, negative values on failure. | |
687 | * | |
688 | */ | |
689 | int calipso_skbuff_delattr(struct sk_buff *skb) | |
690 | { | |
691 | int ret_val = -ENOMSG; | |
692 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
693 | ||
694 | if (ops) | |
695 | ret_val = ops->skbuff_delattr(skb); | |
696 | return ret_val; | |
697 | } | |
4fee5242 HD |
698 | |
699 | /** | |
700 | * calipso_cache_invalidate - Invalidates the current CALIPSO cache | |
701 | * | |
702 | * Description: | |
703 | * Invalidates and frees any entries in the CALIPSO cache. Returns zero on | |
704 | * success and negative values on failure. | |
705 | * | |
706 | */ | |
707 | void calipso_cache_invalidate(void) | |
708 | { | |
709 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
710 | ||
711 | if (ops) | |
712 | ops->cache_invalidate(); | |
713 | } | |
714 | ||
715 | /** | |
716 | * calipso_cache_add - Add an entry to the CALIPSO cache | |
717 | * @calipso_ptr: the CALIPSO option | |
718 | * @secattr: the packet's security attributes | |
719 | * | |
720 | * Description: | |
721 | * Add a new entry into the CALIPSO label mapping cache. | |
722 | * Returns zero on success, negative values on failure. | |
723 | * | |
724 | */ | |
725 | int calipso_cache_add(const unsigned char *calipso_ptr, | |
726 | const struct netlbl_lsm_secattr *secattr) | |
727 | ||
728 | { | |
729 | int ret_val = -ENOMSG; | |
730 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
731 | ||
732 | if (ops) | |
733 | ret_val = ops->cache_add(calipso_ptr, secattr); | |
734 | return ret_val; | |
735 | } |