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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 | ||
57 | /* NetLabel Command Handlers | |
58 | */ | |
59 | /** | |
60 | * netlbl_calipso_add_pass - Adds a CALIPSO pass DOI definition | |
61 | * @info: the Generic NETLINK info block | |
62 | * @audit_info: NetLabel audit information | |
63 | * | |
64 | * Description: | |
65 | * Create a new CALIPSO_MAP_PASS DOI definition based on the given ADD message | |
66 | * and add it to the CALIPSO engine. Return zero on success and non-zero on | |
67 | * error. | |
68 | * | |
69 | */ | |
70 | static int netlbl_calipso_add_pass(struct genl_info *info, | |
71 | struct netlbl_audit *audit_info) | |
72 | { | |
73 | int ret_val; | |
74 | struct calipso_doi *doi_def = NULL; | |
75 | ||
76 | doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL); | |
77 | if (!doi_def) | |
78 | return -ENOMEM; | |
79 | doi_def->type = CALIPSO_MAP_PASS; | |
80 | doi_def->doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
81 | ret_val = calipso_doi_add(doi_def, audit_info); | |
82 | if (ret_val != 0) | |
83 | calipso_doi_free(doi_def); | |
84 | ||
85 | return ret_val; | |
86 | } | |
87 | ||
88 | /** | |
89 | * netlbl_calipso_add - Handle an ADD message | |
90 | * @skb: the NETLINK buffer | |
91 | * @info: the Generic NETLINK info block | |
92 | * | |
93 | * Description: | |
94 | * Create a new DOI definition based on the given ADD message and add it to the | |
95 | * CALIPSO engine. Returns zero on success, negative values on failure. | |
96 | * | |
97 | */ | |
98 | static int netlbl_calipso_add(struct sk_buff *skb, struct genl_info *info) | |
99 | ||
100 | { | |
101 | int ret_val = -EINVAL; | |
102 | struct netlbl_audit audit_info; | |
103 | ||
104 | if (!info->attrs[NLBL_CALIPSO_A_DOI] || | |
105 | !info->attrs[NLBL_CALIPSO_A_MTYPE]) | |
106 | return -EINVAL; | |
107 | ||
f7e0318a | 108 | netlbl_netlink_auditinfo(&audit_info); |
cb72d382 HD |
109 | switch (nla_get_u32(info->attrs[NLBL_CALIPSO_A_MTYPE])) { |
110 | case CALIPSO_MAP_PASS: | |
111 | ret_val = netlbl_calipso_add_pass(info, &audit_info); | |
112 | break; | |
113 | } | |
114 | if (ret_val == 0) | |
115 | atomic_inc(&netlabel_mgmt_protocount); | |
116 | ||
117 | return ret_val; | |
118 | } | |
119 | ||
a5e34490 HD |
120 | /** |
121 | * netlbl_calipso_list - Handle a LIST message | |
122 | * @skb: the NETLINK buffer | |
123 | * @info: the Generic NETLINK info block | |
124 | * | |
125 | * Description: | |
126 | * Process a user generated LIST message and respond accordingly. | |
127 | * Returns zero on success and negative values on error. | |
128 | * | |
129 | */ | |
130 | static int netlbl_calipso_list(struct sk_buff *skb, struct genl_info *info) | |
131 | { | |
132 | int ret_val; | |
133 | struct sk_buff *ans_skb = NULL; | |
134 | void *data; | |
135 | u32 doi; | |
136 | struct calipso_doi *doi_def; | |
137 | ||
138 | if (!info->attrs[NLBL_CALIPSO_A_DOI]) { | |
139 | ret_val = -EINVAL; | |
140 | goto list_failure; | |
141 | } | |
142 | ||
143 | doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); | |
144 | ||
145 | doi_def = calipso_doi_getdef(doi); | |
146 | if (!doi_def) { | |
147 | ret_val = -EINVAL; | |
148 | goto list_failure; | |
149 | } | |
150 | ||
151 | ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
152 | if (!ans_skb) { | |
153 | ret_val = -ENOMEM; | |
154 | goto list_failure_put; | |
155 | } | |
156 | data = genlmsg_put_reply(ans_skb, info, &netlbl_calipso_gnl_family, | |
157 | 0, NLBL_CALIPSO_C_LIST); | |
158 | if (!data) { | |
159 | ret_val = -ENOMEM; | |
160 | goto list_failure_put; | |
161 | } | |
162 | ||
163 | ret_val = nla_put_u32(ans_skb, NLBL_CALIPSO_A_MTYPE, doi_def->type); | |
164 | if (ret_val != 0) | |
165 | goto list_failure_put; | |
166 | ||
167 | calipso_doi_putdef(doi_def); | |
168 | ||
169 | genlmsg_end(ans_skb, data); | |
170 | return genlmsg_reply(ans_skb, info); | |
171 | ||
172 | list_failure_put: | |
173 | calipso_doi_putdef(doi_def); | |
174 | list_failure: | |
175 | kfree_skb(ans_skb); | |
176 | return ret_val; | |
177 | } | |
178 | ||
e1ce69df HD |
179 | /** |
180 | * netlbl_calipso_listall_cb - calipso_doi_walk() callback for LISTALL | |
181 | * @doi_def: the CALIPSO DOI definition | |
182 | * @arg: the netlbl_calipso_doiwalk_arg structure | |
183 | * | |
184 | * Description: | |
185 | * This function is designed to be used as a callback to the | |
186 | * calipso_doi_walk() function for use in generating a response for a LISTALL | |
187 | * message. Returns the size of the message on success, negative values on | |
188 | * failure. | |
189 | * | |
190 | */ | |
191 | static int netlbl_calipso_listall_cb(struct calipso_doi *doi_def, void *arg) | |
192 | { | |
193 | int ret_val = -ENOMEM; | |
194 | struct netlbl_calipso_doiwalk_arg *cb_arg = arg; | |
195 | void *data; | |
196 | ||
197 | data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).portid, | |
198 | cb_arg->seq, &netlbl_calipso_gnl_family, | |
199 | NLM_F_MULTI, NLBL_CALIPSO_C_LISTALL); | |
200 | if (!data) | |
201 | goto listall_cb_failure; | |
202 | ||
203 | ret_val = nla_put_u32(cb_arg->skb, NLBL_CALIPSO_A_DOI, doi_def->doi); | |
204 | if (ret_val != 0) | |
205 | goto listall_cb_failure; | |
206 | ret_val = nla_put_u32(cb_arg->skb, | |
207 | NLBL_CALIPSO_A_MTYPE, | |
208 | doi_def->type); | |
209 | if (ret_val != 0) | |
210 | goto listall_cb_failure; | |
211 | ||
212 | genlmsg_end(cb_arg->skb, data); | |
213 | return 0; | |
214 | ||
215 | listall_cb_failure: | |
216 | genlmsg_cancel(cb_arg->skb, data); | |
217 | return ret_val; | |
218 | } | |
219 | ||
220 | /** | |
221 | * netlbl_calipso_listall - Handle a LISTALL message | |
222 | * @skb: the NETLINK buffer | |
223 | * @cb: the NETLINK callback | |
224 | * | |
225 | * Description: | |
226 | * Process a user generated LISTALL message and respond accordingly. Returns | |
227 | * zero on success and negative values on error. | |
228 | * | |
229 | */ | |
230 | static int netlbl_calipso_listall(struct sk_buff *skb, | |
231 | struct netlink_callback *cb) | |
232 | { | |
233 | struct netlbl_calipso_doiwalk_arg cb_arg; | |
234 | u32 doi_skip = cb->args[0]; | |
235 | ||
236 | cb_arg.nl_cb = cb; | |
237 | cb_arg.skb = skb; | |
238 | cb_arg.seq = cb->nlh->nlmsg_seq; | |
239 | ||
240 | calipso_doi_walk(&doi_skip, netlbl_calipso_listall_cb, &cb_arg); | |
241 | ||
242 | cb->args[0] = doi_skip; | |
243 | return skb->len; | |
244 | } | |
245 | ||
d7cce015 HD |
246 | /** |
247 | * netlbl_calipso_remove_cb - netlbl_calipso_remove() callback for REMOVE | |
248 | * @entry: LSM domain mapping entry | |
249 | * @arg: the netlbl_domhsh_walk_arg structure | |
250 | * | |
251 | * Description: | |
252 | * This function is intended for use by netlbl_calipso_remove() as the callback | |
253 | * for the netlbl_domhsh_walk() function; it removes LSM domain map entries | |
254 | * which are associated with the CALIPSO DOI specified in @arg. Returns zero on | |
255 | * success, negative values on failure. | |
256 | * | |
257 | */ | |
258 | static int netlbl_calipso_remove_cb(struct netlbl_dom_map *entry, void *arg) | |
259 | { | |
260 | struct netlbl_domhsh_walk_arg *cb_arg = arg; | |
261 | ||
262 | if (entry->def.type == NETLBL_NLTYPE_CALIPSO && | |
263 | entry->def.calipso->doi == cb_arg->doi) | |
264 | return netlbl_domhsh_remove_entry(entry, cb_arg->audit_info); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | /** | |
270 | * netlbl_calipso_remove - Handle a REMOVE message | |
271 | * @skb: the NETLINK buffer | |
272 | * @info: the Generic NETLINK info block | |
273 | * | |
274 | * Description: | |
275 | * Process a user generated REMOVE message and respond accordingly. Returns | |
276 | * zero on success, negative values on failure. | |
277 | * | |
278 | */ | |
279 | static int netlbl_calipso_remove(struct sk_buff *skb, struct genl_info *info) | |
280 | { | |
281 | int ret_val = -EINVAL; | |
282 | struct netlbl_domhsh_walk_arg cb_arg; | |
283 | struct netlbl_audit audit_info; | |
284 | u32 skip_bkt = 0; | |
285 | u32 skip_chain = 0; | |
286 | ||
287 | if (!info->attrs[NLBL_CALIPSO_A_DOI]) | |
288 | return -EINVAL; | |
289 | ||
f7e0318a | 290 | netlbl_netlink_auditinfo(&audit_info); |
d7cce015 HD |
291 | cb_arg.doi = nla_get_u32(info->attrs[NLBL_CALIPSO_A_DOI]); |
292 | cb_arg.audit_info = &audit_info; | |
293 | ret_val = netlbl_domhsh_walk(&skip_bkt, &skip_chain, | |
294 | netlbl_calipso_remove_cb, &cb_arg); | |
295 | if (ret_val == 0 || ret_val == -ENOENT) { | |
296 | ret_val = calipso_doi_remove(cb_arg.doi, &audit_info); | |
297 | if (ret_val == 0) | |
298 | atomic_dec(&netlabel_mgmt_protocount); | |
299 | } | |
300 | ||
301 | return ret_val; | |
302 | } | |
303 | ||
cb72d382 HD |
304 | /* NetLabel Generic NETLINK Command Definitions |
305 | */ | |
306 | ||
66a9b928 | 307 | static const struct genl_small_ops netlbl_calipso_ops[] = { |
cb72d382 HD |
308 | { |
309 | .cmd = NLBL_CALIPSO_C_ADD, | |
ef6243ac | 310 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
cb72d382 | 311 | .flags = GENL_ADMIN_PERM, |
cb72d382 HD |
312 | .doit = netlbl_calipso_add, |
313 | .dumpit = NULL, | |
314 | }, | |
a5e34490 | 315 | { |
d7cce015 | 316 | .cmd = NLBL_CALIPSO_C_REMOVE, |
ef6243ac | 317 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
d7cce015 | 318 | .flags = GENL_ADMIN_PERM, |
d7cce015 HD |
319 | .doit = netlbl_calipso_remove, |
320 | .dumpit = NULL, | |
321 | }, | |
322 | { | |
a5e34490 | 323 | .cmd = NLBL_CALIPSO_C_LIST, |
ef6243ac | 324 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
a5e34490 | 325 | .flags = 0, |
a5e34490 HD |
326 | .doit = netlbl_calipso_list, |
327 | .dumpit = NULL, | |
328 | }, | |
e1ce69df HD |
329 | { |
330 | .cmd = NLBL_CALIPSO_C_LISTALL, | |
ef6243ac | 331 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
e1ce69df | 332 | .flags = 0, |
e1ce69df HD |
333 | .doit = NULL, |
334 | .dumpit = netlbl_calipso_listall, | |
335 | }, | |
cb72d382 HD |
336 | }; |
337 | ||
56989f6d | 338 | static struct genl_family netlbl_calipso_gnl_family __ro_after_init = { |
489111e5 JB |
339 | .hdrsize = 0, |
340 | .name = NETLBL_NLTYPE_CALIPSO_NAME, | |
341 | .version = NETLBL_PROTO_VERSION, | |
342 | .maxattr = NLBL_CALIPSO_A_MAX, | |
3b0f31f2 | 343 | .policy = calipso_genl_policy, |
489111e5 | 344 | .module = THIS_MODULE, |
66a9b928 JK |
345 | .small_ops = netlbl_calipso_ops, |
346 | .n_small_ops = ARRAY_SIZE(netlbl_calipso_ops), | |
489111e5 JB |
347 | }; |
348 | ||
cb72d382 HD |
349 | /* NetLabel Generic NETLINK Protocol Functions |
350 | */ | |
351 | ||
352 | /** | |
353 | * netlbl_calipso_genl_init - Register the CALIPSO NetLabel component | |
354 | * | |
355 | * Description: | |
356 | * Register the CALIPSO packet NetLabel component with the Generic NETLINK | |
357 | * mechanism. Returns zero on success, negative values on failure. | |
358 | * | |
359 | */ | |
360 | int __init netlbl_calipso_genl_init(void) | |
361 | { | |
489111e5 | 362 | return genl_register_family(&netlbl_calipso_gnl_family); |
cb72d382 HD |
363 | } |
364 | ||
365 | static const struct netlbl_calipso_ops *calipso_ops; | |
366 | ||
367 | /** | |
368 | * netlbl_calipso_ops_register - Register the CALIPSO operations | |
294ea291 | 369 | * @ops: ops to register |
cb72d382 HD |
370 | * |
371 | * Description: | |
372 | * Register the CALIPSO packet engine operations. | |
373 | * | |
374 | */ | |
375 | const struct netlbl_calipso_ops * | |
376 | netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops) | |
377 | { | |
378 | return xchg(&calipso_ops, ops); | |
379 | } | |
380 | EXPORT_SYMBOL(netlbl_calipso_ops_register); | |
381 | ||
382 | static const struct netlbl_calipso_ops *netlbl_calipso_ops_get(void) | |
383 | { | |
6aa7de05 | 384 | return READ_ONCE(calipso_ops); |
cb72d382 HD |
385 | } |
386 | ||
387 | /** | |
388 | * calipso_doi_add - Add a new DOI to the CALIPSO protocol engine | |
389 | * @doi_def: the DOI structure | |
390 | * @audit_info: NetLabel audit information | |
391 | * | |
392 | * Description: | |
393 | * The caller defines a new DOI for use by the CALIPSO engine and calls this | |
394 | * function to add it to the list of acceptable domains. The caller must | |
395 | * ensure that the mapping table specified in @doi_def->map meets all of the | |
396 | * requirements of the mapping type (see calipso.h for details). Returns | |
397 | * zero on success and non-zero on failure. | |
398 | * | |
399 | */ | |
400 | int calipso_doi_add(struct calipso_doi *doi_def, | |
401 | struct netlbl_audit *audit_info) | |
402 | { | |
403 | int ret_val = -ENOMSG; | |
404 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
405 | ||
406 | if (ops) | |
407 | ret_val = ops->doi_add(doi_def, audit_info); | |
408 | return ret_val; | |
409 | } | |
410 | ||
411 | /** | |
412 | * calipso_doi_free - Frees a DOI definition | |
413 | * @doi_def: the DOI definition | |
414 | * | |
415 | * Description: | |
416 | * This function frees all of the memory associated with a DOI definition. | |
417 | * | |
418 | */ | |
419 | void calipso_doi_free(struct calipso_doi *doi_def) | |
420 | { | |
421 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
422 | ||
423 | if (ops) | |
424 | ops->doi_free(doi_def); | |
425 | } | |
a5e34490 | 426 | |
d7cce015 HD |
427 | /** |
428 | * calipso_doi_remove - Remove an existing DOI from the CALIPSO protocol engine | |
429 | * @doi: the DOI value | |
8c70b268 | 430 | * @audit_info: NetLabel audit information |
d7cce015 HD |
431 | * |
432 | * Description: | |
433 | * Removes a DOI definition from the CALIPSO engine. The NetLabel routines will | |
434 | * be called to release their own LSM domain mappings as well as our own | |
435 | * domain list. Returns zero on success and negative values on failure. | |
436 | * | |
437 | */ | |
438 | int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info) | |
439 | { | |
440 | int ret_val = -ENOMSG; | |
441 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
442 | ||
443 | if (ops) | |
444 | ret_val = ops->doi_remove(doi, audit_info); | |
445 | return ret_val; | |
446 | } | |
447 | ||
a5e34490 HD |
448 | /** |
449 | * calipso_doi_getdef - Returns a reference to a valid DOI definition | |
450 | * @doi: the DOI value | |
451 | * | |
452 | * Description: | |
453 | * Searches for a valid DOI definition and if one is found it is returned to | |
454 | * the caller. Otherwise NULL is returned. The caller must ensure that | |
455 | * calipso_doi_putdef() is called when the caller is done. | |
456 | * | |
457 | */ | |
458 | struct calipso_doi *calipso_doi_getdef(u32 doi) | |
459 | { | |
460 | struct calipso_doi *ret_val = NULL; | |
461 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
462 | ||
463 | if (ops) | |
464 | ret_val = ops->doi_getdef(doi); | |
465 | return ret_val; | |
466 | } | |
467 | ||
468 | /** | |
469 | * calipso_doi_putdef - Releases a reference for the given DOI definition | |
470 | * @doi_def: the DOI definition | |
471 | * | |
472 | * Description: | |
473 | * Releases a DOI definition reference obtained from calipso_doi_getdef(). | |
474 | * | |
475 | */ | |
476 | void calipso_doi_putdef(struct calipso_doi *doi_def) | |
477 | { | |
478 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
479 | ||
480 | if (ops) | |
481 | ops->doi_putdef(doi_def); | |
482 | } | |
e1ce69df HD |
483 | |
484 | /** | |
485 | * calipso_doi_walk - Iterate through the DOI definitions | |
486 | * @skip_cnt: skip past this number of DOI definitions, updated | |
487 | * @callback: callback for each DOI definition | |
488 | * @cb_arg: argument for the callback function | |
489 | * | |
490 | * Description: | |
491 | * Iterate over the DOI definition list, skipping the first @skip_cnt entries. | |
492 | * For each entry call @callback, if @callback returns a negative value stop | |
493 | * 'walking' through the list and return. Updates the value in @skip_cnt upon | |
494 | * return. Returns zero on success, negative values on failure. | |
495 | * | |
496 | */ | |
497 | int calipso_doi_walk(u32 *skip_cnt, | |
498 | int (*callback)(struct calipso_doi *doi_def, void *arg), | |
499 | void *cb_arg) | |
500 | { | |
501 | int ret_val = -ENOMSG; | |
502 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
503 | ||
504 | if (ops) | |
505 | ret_val = ops->doi_walk(skip_cnt, callback, cb_arg); | |
506 | return ret_val; | |
507 | } | |
ceba1832 HD |
508 | |
509 | /** | |
510 | * calipso_sock_getattr - Get the security attributes from a sock | |
511 | * @sk: the sock | |
512 | * @secattr: the security attributes | |
513 | * | |
514 | * Description: | |
515 | * Query @sk to see if there is a CALIPSO option attached to the sock and if | |
516 | * there is return the CALIPSO security attributes in @secattr. This function | |
517 | * requires that @sk be locked, or privately held, but it does not do any | |
518 | * locking itself. Returns zero on success and negative values on failure. | |
519 | * | |
520 | */ | |
521 | int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr) | |
522 | { | |
523 | int ret_val = -ENOMSG; | |
524 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
525 | ||
526 | if (ops) | |
527 | ret_val = ops->sock_getattr(sk, secattr); | |
528 | return ret_val; | |
529 | } | |
530 | ||
531 | /** | |
532 | * calipso_sock_setattr - Add a CALIPSO option to a socket | |
533 | * @sk: the socket | |
534 | * @doi_def: the CALIPSO DOI to use | |
535 | * @secattr: the specific security attributes of the socket | |
536 | * | |
537 | * Description: | |
538 | * Set the CALIPSO option on the given socket using the DOI definition and | |
539 | * security attributes passed to the function. This function requires | |
540 | * exclusive access to @sk, which means it either needs to be in the | |
541 | * process of being created or locked. Returns zero on success and negative | |
542 | * values on failure. | |
543 | * | |
544 | */ | |
545 | int calipso_sock_setattr(struct sock *sk, | |
546 | const struct calipso_doi *doi_def, | |
547 | const struct netlbl_lsm_secattr *secattr) | |
548 | { | |
549 | int ret_val = -ENOMSG; | |
550 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
551 | ||
552 | if (ops) | |
553 | ret_val = ops->sock_setattr(sk, doi_def, secattr); | |
554 | return ret_val; | |
555 | } | |
556 | ||
557 | /** | |
558 | * calipso_sock_delattr - Delete the CALIPSO option from a socket | |
559 | * @sk: the socket | |
560 | * | |
561 | * Description: | |
562 | * Removes the CALIPSO option from a socket, if present. | |
563 | * | |
564 | */ | |
565 | void calipso_sock_delattr(struct sock *sk) | |
566 | { | |
567 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
568 | ||
569 | if (ops) | |
570 | ops->sock_delattr(sk); | |
571 | } | |
e1adea92 HD |
572 | |
573 | /** | |
574 | * calipso_req_setattr - Add a CALIPSO option to a connection request socket | |
575 | * @req: the connection request socket | |
576 | * @doi_def: the CALIPSO DOI to use | |
577 | * @secattr: the specific security attributes of the socket | |
578 | * | |
579 | * Description: | |
580 | * Set the CALIPSO option on the given socket using the DOI definition and | |
581 | * security attributes passed to the function. Returns zero on success and | |
582 | * negative values on failure. | |
583 | * | |
584 | */ | |
585 | int calipso_req_setattr(struct request_sock *req, | |
586 | const struct calipso_doi *doi_def, | |
587 | const struct netlbl_lsm_secattr *secattr) | |
588 | { | |
589 | int ret_val = -ENOMSG; | |
590 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
591 | ||
592 | if (ops) | |
593 | ret_val = ops->req_setattr(req, doi_def, secattr); | |
594 | return ret_val; | |
595 | } | |
596 | ||
597 | /** | |
598 | * calipso_req_delattr - Delete the CALIPSO option from a request socket | |
8c70b268 | 599 | * @req: the request socket |
e1adea92 HD |
600 | * |
601 | * Description: | |
602 | * Removes the CALIPSO option from a request socket, if present. | |
603 | * | |
604 | */ | |
605 | void calipso_req_delattr(struct request_sock *req) | |
606 | { | |
607 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
608 | ||
609 | if (ops) | |
610 | ops->req_delattr(req); | |
611 | } | |
2917f57b HD |
612 | |
613 | /** | |
614 | * calipso_optptr - Find the CALIPSO option in the packet | |
615 | * @skb: the packet | |
616 | * | |
617 | * Description: | |
618 | * Parse the packet's IP header looking for a CALIPSO option. Returns a pointer | |
619 | * to the start of the CALIPSO option on success, NULL if one if not found. | |
620 | * | |
621 | */ | |
622 | unsigned char *calipso_optptr(const struct sk_buff *skb) | |
623 | { | |
624 | unsigned char *ret_val = NULL; | |
625 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
626 | ||
627 | if (ops) | |
628 | ret_val = ops->skbuff_optptr(skb); | |
629 | return ret_val; | |
630 | } | |
631 | ||
632 | /** | |
633 | * calipso_getattr - Get the security attributes from a memory block. | |
634 | * @calipso: the CALIPSO option | |
635 | * @secattr: the security attributes | |
636 | * | |
637 | * Description: | |
638 | * Inspect @calipso and return the security attributes in @secattr. | |
639 | * Returns zero on success and negative values on failure. | |
640 | * | |
641 | */ | |
642 | int calipso_getattr(const unsigned char *calipso, | |
643 | struct netlbl_lsm_secattr *secattr) | |
644 | { | |
645 | int ret_val = -ENOMSG; | |
646 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
647 | ||
648 | if (ops) | |
649 | ret_val = ops->opt_getattr(calipso, secattr); | |
650 | return ret_val; | |
651 | } | |
652 | ||
653 | /** | |
654 | * calipso_skbuff_setattr - Set the CALIPSO option on a packet | |
655 | * @skb: the packet | |
656 | * @doi_def: the CALIPSO DOI to use | |
657 | * @secattr: the security attributes | |
658 | * | |
659 | * Description: | |
660 | * Set the CALIPSO option on the given packet based on the security attributes. | |
661 | * Returns a pointer to the IP header on success and NULL on failure. | |
662 | * | |
663 | */ | |
664 | int calipso_skbuff_setattr(struct sk_buff *skb, | |
665 | const struct calipso_doi *doi_def, | |
666 | const struct netlbl_lsm_secattr *secattr) | |
667 | { | |
668 | int ret_val = -ENOMSG; | |
669 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
670 | ||
671 | if (ops) | |
672 | ret_val = ops->skbuff_setattr(skb, doi_def, secattr); | |
673 | return ret_val; | |
674 | } | |
675 | ||
676 | /** | |
677 | * calipso_skbuff_delattr - Delete any CALIPSO options from a packet | |
678 | * @skb: the packet | |
679 | * | |
680 | * Description: | |
681 | * Removes any and all CALIPSO options from the given packet. Returns zero on | |
682 | * success, negative values on failure. | |
683 | * | |
684 | */ | |
685 | int calipso_skbuff_delattr(struct sk_buff *skb) | |
686 | { | |
687 | int ret_val = -ENOMSG; | |
688 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
689 | ||
690 | if (ops) | |
691 | ret_val = ops->skbuff_delattr(skb); | |
692 | return ret_val; | |
693 | } | |
4fee5242 HD |
694 | |
695 | /** | |
696 | * calipso_cache_invalidate - Invalidates the current CALIPSO cache | |
697 | * | |
698 | * Description: | |
699 | * Invalidates and frees any entries in the CALIPSO cache. Returns zero on | |
700 | * success and negative values on failure. | |
701 | * | |
702 | */ | |
703 | void calipso_cache_invalidate(void) | |
704 | { | |
705 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
706 | ||
707 | if (ops) | |
708 | ops->cache_invalidate(); | |
709 | } | |
710 | ||
711 | /** | |
712 | * calipso_cache_add - Add an entry to the CALIPSO cache | |
713 | * @calipso_ptr: the CALIPSO option | |
714 | * @secattr: the packet's security attributes | |
715 | * | |
716 | * Description: | |
717 | * Add a new entry into the CALIPSO label mapping cache. | |
718 | * Returns zero on success, negative values on failure. | |
719 | * | |
720 | */ | |
721 | int calipso_cache_add(const unsigned char *calipso_ptr, | |
722 | const struct netlbl_lsm_secattr *secattr) | |
723 | ||
724 | { | |
725 | int ret_val = -ENOMSG; | |
726 | const struct netlbl_calipso_ops *ops = netlbl_calipso_ops_get(); | |
727 | ||
728 | if (ops) | |
729 | ret_val = ops->cache_add(calipso_ptr, secattr); | |
730 | return ret_val; | |
731 | } |