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1ccea77e | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d15c345f PM |
2 | /* |
3 | * NetLabel Kernel API | |
4 | * | |
5 | * This file defines the kernel API for the NetLabel system. The NetLabel | |
6 | * system manages static and dynamic label mappings for network protocols such | |
7 | * as CIPSO and RIPSO. | |
8 | * | |
82c21bfa | 9 | * Author: Paul Moore <paul@paul-moore.com> |
d15c345f PM |
10 | */ |
11 | ||
12 | /* | |
014ab19a | 13 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 |
d15c345f PM |
14 | */ |
15 | ||
16 | #include <linux/init.h> | |
17 | #include <linux/types.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
eda61d32 | 19 | #include <linux/audit.h> |
6c2e8ac0 PM |
20 | #include <linux/in.h> |
21 | #include <linux/in6.h> | |
d15c345f | 22 | #include <net/ip.h> |
6c2e8ac0 | 23 | #include <net/ipv6.h> |
d15c345f PM |
24 | #include <net/netlabel.h> |
25 | #include <net/cipso_ipv4.h> | |
ceba1832 | 26 | #include <net/calipso.h> |
d15c345f | 27 | #include <asm/bug.h> |
60063497 | 28 | #include <linux/atomic.h> |
d15c345f PM |
29 | |
30 | #include "netlabel_domainhash.h" | |
31 | #include "netlabel_unlabeled.h" | |
eda61d32 | 32 | #include "netlabel_cipso_v4.h" |
ceba1832 | 33 | #include "netlabel_calipso.h" |
d15c345f | 34 | #include "netlabel_user.h" |
23bcdc1a | 35 | #include "netlabel_mgmt.h" |
6c2e8ac0 | 36 | #include "netlabel_addrlist.h" |
d15c345f | 37 | |
eda61d32 PM |
38 | /* |
39 | * Configuration Functions | |
40 | */ | |
41 | ||
42 | /** | |
43 | * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping | |
44 | * @domain: the domain mapping to remove | |
6c2e8ac0 PM |
45 | * @family: address family |
46 | * @addr: IP address | |
47 | * @mask: IP address mask | |
eda61d32 PM |
48 | * @audit_info: NetLabel audit information |
49 | * | |
50 | * Description: | |
51 | * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the | |
52 | * default domain mapping to be removed. Returns zero on success, negative | |
53 | * values on failure. | |
54 | * | |
55 | */ | |
6c2e8ac0 PM |
56 | int netlbl_cfg_map_del(const char *domain, |
57 | u16 family, | |
58 | const void *addr, | |
59 | const void *mask, | |
60 | struct netlbl_audit *audit_info) | |
eda61d32 | 61 | { |
6c2e8ac0 | 62 | if (addr == NULL && mask == NULL) { |
8f18e675 | 63 | return netlbl_domhsh_remove(domain, family, audit_info); |
6c2e8ac0 PM |
64 | } else if (addr != NULL && mask != NULL) { |
65 | switch (family) { | |
66 | case AF_INET: | |
67 | return netlbl_domhsh_remove_af4(domain, addr, mask, | |
68 | audit_info); | |
3f09354a HD |
69 | #if IS_ENABLED(CONFIG_IPV6) |
70 | case AF_INET6: | |
71 | return netlbl_domhsh_remove_af6(domain, addr, mask, | |
72 | audit_info); | |
73 | #endif /* IPv6 */ | |
6c2e8ac0 PM |
74 | default: |
75 | return -EPFNOSUPPORT; | |
76 | } | |
77 | } else | |
78 | return -EINVAL; | |
eda61d32 PM |
79 | } |
80 | ||
81 | /** | |
6c2e8ac0 | 82 | * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping |
eda61d32 | 83 | * @domain: the domain mapping to add |
6c2e8ac0 PM |
84 | * @family: address family |
85 | * @addr: IP address | |
86 | * @mask: IP address mask | |
eda61d32 PM |
87 | * @audit_info: NetLabel audit information |
88 | * | |
89 | * Description: | |
90 | * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL | |
91 | * causes a new default domain mapping to be added. Returns zero on success, | |
92 | * negative values on failure. | |
93 | * | |
94 | */ | |
6c2e8ac0 PM |
95 | int netlbl_cfg_unlbl_map_add(const char *domain, |
96 | u16 family, | |
97 | const void *addr, | |
98 | const void *mask, | |
eda61d32 PM |
99 | struct netlbl_audit *audit_info) |
100 | { | |
101 | int ret_val = -ENOMEM; | |
102 | struct netlbl_dom_map *entry; | |
6c2e8ac0 PM |
103 | struct netlbl_domaddr_map *addrmap = NULL; |
104 | struct netlbl_domaddr4_map *map4 = NULL; | |
105 | struct netlbl_domaddr6_map *map6 = NULL; | |
eda61d32 PM |
106 | |
107 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
108 | if (entry == NULL) | |
948a7243 | 109 | return -ENOMEM; |
eda61d32 PM |
110 | if (domain != NULL) { |
111 | entry->domain = kstrdup(domain, GFP_ATOMIC); | |
112 | if (entry->domain == NULL) | |
6c2e8ac0 PM |
113 | goto cfg_unlbl_map_add_failure; |
114 | } | |
8f18e675 | 115 | entry->family = family; |
6c2e8ac0 PM |
116 | |
117 | if (addr == NULL && mask == NULL) | |
6a8b7f0c | 118 | entry->def.type = NETLBL_NLTYPE_UNLABELED; |
6c2e8ac0 PM |
119 | else if (addr != NULL && mask != NULL) { |
120 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); | |
121 | if (addrmap == NULL) | |
122 | goto cfg_unlbl_map_add_failure; | |
123 | INIT_LIST_HEAD(&addrmap->list4); | |
124 | INIT_LIST_HEAD(&addrmap->list6); | |
125 | ||
126 | switch (family) { | |
1281bc25 PM |
127 | case AF_INET: { |
128 | const struct in_addr *addr4 = addr; | |
129 | const struct in_addr *mask4 = mask; | |
6c2e8ac0 PM |
130 | map4 = kzalloc(sizeof(*map4), GFP_ATOMIC); |
131 | if (map4 == NULL) | |
132 | goto cfg_unlbl_map_add_failure; | |
6a8b7f0c | 133 | map4->def.type = NETLBL_NLTYPE_UNLABELED; |
6c2e8ac0 PM |
134 | map4->list.addr = addr4->s_addr & mask4->s_addr; |
135 | map4->list.mask = mask4->s_addr; | |
136 | map4->list.valid = 1; | |
137 | ret_val = netlbl_af4list_add(&map4->list, | |
138 | &addrmap->list4); | |
139 | if (ret_val != 0) | |
140 | goto cfg_unlbl_map_add_failure; | |
141 | break; | |
1281bc25 | 142 | } |
dfd56b8b | 143 | #if IS_ENABLED(CONFIG_IPV6) |
1281bc25 PM |
144 | case AF_INET6: { |
145 | const struct in6_addr *addr6 = addr; | |
146 | const struct in6_addr *mask6 = mask; | |
6c2e8ac0 | 147 | map6 = kzalloc(sizeof(*map6), GFP_ATOMIC); |
ca7daea6 | 148 | if (map6 == NULL) |
6c2e8ac0 | 149 | goto cfg_unlbl_map_add_failure; |
6a8b7f0c | 150 | map6->def.type = NETLBL_NLTYPE_UNLABELED; |
4e3fd7a0 | 151 | map6->list.addr = *addr6; |
6c2e8ac0 PM |
152 | map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0]; |
153 | map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1]; | |
154 | map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2]; | |
155 | map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3]; | |
4e3fd7a0 | 156 | map6->list.mask = *mask6; |
6c2e8ac0 | 157 | map6->list.valid = 1; |
42ca0203 DC |
158 | ret_val = netlbl_af6list_add(&map6->list, |
159 | &addrmap->list6); | |
6c2e8ac0 PM |
160 | if (ret_val != 0) |
161 | goto cfg_unlbl_map_add_failure; | |
162 | break; | |
1281bc25 PM |
163 | } |
164 | #endif /* IPv6 */ | |
6c2e8ac0 PM |
165 | default: |
166 | goto cfg_unlbl_map_add_failure; | |
6c2e8ac0 PM |
167 | } |
168 | ||
6a8b7f0c PM |
169 | entry->def.addrsel = addrmap; |
170 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; | |
6c2e8ac0 PM |
171 | } else { |
172 | ret_val = -EINVAL; | |
173 | goto cfg_unlbl_map_add_failure; | |
eda61d32 | 174 | } |
eda61d32 PM |
175 | |
176 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
177 | if (ret_val != 0) | |
6c2e8ac0 | 178 | goto cfg_unlbl_map_add_failure; |
eda61d32 PM |
179 | |
180 | return 0; | |
181 | ||
6c2e8ac0 | 182 | cfg_unlbl_map_add_failure: |
47943234 | 183 | kfree(entry->domain); |
eda61d32 | 184 | kfree(entry); |
6c2e8ac0 PM |
185 | kfree(addrmap); |
186 | kfree(map4); | |
187 | kfree(map6); | |
eda61d32 PM |
188 | return ret_val; |
189 | } | |
190 | ||
6c2e8ac0 PM |
191 | |
192 | /** | |
193 | * netlbl_cfg_unlbl_static_add - Adds a new static label | |
194 | * @net: network namespace | |
195 | * @dev_name: interface name | |
196 | * @addr: IP address in network byte order (struct in[6]_addr) | |
197 | * @mask: address mask in network byte order (struct in[6]_addr) | |
198 | * @family: address family | |
199 | * @secid: LSM secid value for the entry | |
200 | * @audit_info: NetLabel audit information | |
201 | * | |
202 | * Description: | |
203 | * Adds a new NetLabel static label to be used when protocol provided labels | |
204 | * are not present on incoming traffic. If @dev_name is NULL then the default | |
205 | * interface will be used. Returns zero on success, negative values on failure. | |
206 | * | |
207 | */ | |
208 | int netlbl_cfg_unlbl_static_add(struct net *net, | |
209 | const char *dev_name, | |
210 | const void *addr, | |
211 | const void *mask, | |
212 | u16 family, | |
213 | u32 secid, | |
214 | struct netlbl_audit *audit_info) | |
215 | { | |
216 | u32 addr_len; | |
217 | ||
218 | switch (family) { | |
219 | case AF_INET: | |
220 | addr_len = sizeof(struct in_addr); | |
221 | break; | |
dfd56b8b | 222 | #if IS_ENABLED(CONFIG_IPV6) |
6c2e8ac0 PM |
223 | case AF_INET6: |
224 | addr_len = sizeof(struct in6_addr); | |
225 | break; | |
1281bc25 | 226 | #endif /* IPv6 */ |
6c2e8ac0 PM |
227 | default: |
228 | return -EPFNOSUPPORT; | |
229 | } | |
230 | ||
231 | return netlbl_unlhsh_add(net, | |
232 | dev_name, addr, mask, addr_len, | |
233 | secid, audit_info); | |
234 | } | |
235 | ||
236 | /** | |
237 | * netlbl_cfg_unlbl_static_del - Removes an existing static label | |
238 | * @net: network namespace | |
239 | * @dev_name: interface name | |
240 | * @addr: IP address in network byte order (struct in[6]_addr) | |
241 | * @mask: address mask in network byte order (struct in[6]_addr) | |
242 | * @family: address family | |
6c2e8ac0 PM |
243 | * @audit_info: NetLabel audit information |
244 | * | |
245 | * Description: | |
246 | * Removes an existing NetLabel static label used when protocol provided labels | |
247 | * are not present on incoming traffic. If @dev_name is NULL then the default | |
248 | * interface will be used. Returns zero on success, negative values on failure. | |
249 | * | |
250 | */ | |
251 | int netlbl_cfg_unlbl_static_del(struct net *net, | |
252 | const char *dev_name, | |
253 | const void *addr, | |
254 | const void *mask, | |
255 | u16 family, | |
256 | struct netlbl_audit *audit_info) | |
257 | { | |
258 | u32 addr_len; | |
259 | ||
260 | switch (family) { | |
261 | case AF_INET: | |
262 | addr_len = sizeof(struct in_addr); | |
263 | break; | |
dfd56b8b | 264 | #if IS_ENABLED(CONFIG_IPV6) |
6c2e8ac0 PM |
265 | case AF_INET6: |
266 | addr_len = sizeof(struct in6_addr); | |
267 | break; | |
1281bc25 | 268 | #endif /* IPv6 */ |
6c2e8ac0 PM |
269 | default: |
270 | return -EPFNOSUPPORT; | |
271 | } | |
272 | ||
273 | return netlbl_unlhsh_remove(net, | |
274 | dev_name, addr, mask, addr_len, | |
275 | audit_info); | |
276 | } | |
277 | ||
278 | /** | |
279 | * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition | |
280 | * @doi_def: CIPSO DOI definition | |
281 | * @audit_info: NetLabel audit information | |
282 | * | |
283 | * Description: | |
284 | * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on | |
285 | * success and negative values on failure. | |
286 | * | |
287 | */ | |
288 | int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def, | |
289 | struct netlbl_audit *audit_info) | |
290 | { | |
291 | return cipso_v4_doi_add(doi_def, audit_info); | |
292 | } | |
293 | ||
294 | /** | |
295 | * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition | |
296 | * @doi: CIPSO DOI | |
297 | * @audit_info: NetLabel audit information | |
298 | * | |
299 | * Description: | |
300 | * Remove an existing CIPSO DOI definition matching @doi. Returns zero on | |
301 | * success and negative values on failure. | |
302 | * | |
303 | */ | |
304 | void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info) | |
305 | { | |
306 | cipso_v4_doi_remove(doi, audit_info); | |
307 | } | |
308 | ||
eda61d32 | 309 | /** |
6c2e8ac0 PM |
310 | * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping |
311 | * @doi: the CIPSO DOI | |
eda61d32 | 312 | * @domain: the domain mapping to add |
6c2e8ac0 PM |
313 | * @addr: IP address |
314 | * @mask: IP address mask | |
eda61d32 PM |
315 | * @audit_info: NetLabel audit information |
316 | * | |
317 | * Description: | |
6c2e8ac0 PM |
318 | * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel |
319 | * subsystem. A @domain value of NULL adds a new default domain mapping. | |
320 | * Returns zero on success, negative values on failure. | |
eda61d32 PM |
321 | * |
322 | */ | |
6c2e8ac0 | 323 | int netlbl_cfg_cipsov4_map_add(u32 doi, |
eda61d32 | 324 | const char *domain, |
6c2e8ac0 PM |
325 | const struct in_addr *addr, |
326 | const struct in_addr *mask, | |
eda61d32 PM |
327 | struct netlbl_audit *audit_info) |
328 | { | |
329 | int ret_val = -ENOMEM; | |
6c2e8ac0 | 330 | struct cipso_v4_doi *doi_def; |
eda61d32 | 331 | struct netlbl_dom_map *entry; |
6c2e8ac0 PM |
332 | struct netlbl_domaddr_map *addrmap = NULL; |
333 | struct netlbl_domaddr4_map *addrinfo = NULL; | |
eda61d32 | 334 | |
6c2e8ac0 PM |
335 | doi_def = cipso_v4_doi_getdef(doi); |
336 | if (doi_def == NULL) | |
337 | return -ENOENT; | |
b1edeb10 | 338 | |
eda61d32 PM |
339 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); |
340 | if (entry == NULL) | |
94a80d63 | 341 | goto out_entry; |
8f18e675 | 342 | entry->family = AF_INET; |
eda61d32 PM |
343 | if (domain != NULL) { |
344 | entry->domain = kstrdup(domain, GFP_ATOMIC); | |
345 | if (entry->domain == NULL) | |
94a80d63 | 346 | goto out_domain; |
eda61d32 | 347 | } |
eda61d32 | 348 | |
6c2e8ac0 | 349 | if (addr == NULL && mask == NULL) { |
6a8b7f0c PM |
350 | entry->def.cipso = doi_def; |
351 | entry->def.type = NETLBL_NLTYPE_CIPSOV4; | |
6c2e8ac0 PM |
352 | } else if (addr != NULL && mask != NULL) { |
353 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); | |
354 | if (addrmap == NULL) | |
94a80d63 | 355 | goto out_addrmap; |
6c2e8ac0 PM |
356 | INIT_LIST_HEAD(&addrmap->list4); |
357 | INIT_LIST_HEAD(&addrmap->list6); | |
358 | ||
359 | addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC); | |
360 | if (addrinfo == NULL) | |
94a80d63 | 361 | goto out_addrinfo; |
6a8b7f0c PM |
362 | addrinfo->def.cipso = doi_def; |
363 | addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4; | |
6c2e8ac0 PM |
364 | addrinfo->list.addr = addr->s_addr & mask->s_addr; |
365 | addrinfo->list.mask = mask->s_addr; | |
366 | addrinfo->list.valid = 1; | |
367 | ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4); | |
368 | if (ret_val != 0) | |
369 | goto cfg_cipsov4_map_add_failure; | |
370 | ||
6a8b7f0c PM |
371 | entry->def.addrsel = addrmap; |
372 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; | |
6c2e8ac0 PM |
373 | } else { |
374 | ret_val = -EINVAL; | |
94a80d63 | 375 | goto out_addrmap; |
b1edeb10 | 376 | } |
6c2e8ac0 | 377 | |
eda61d32 PM |
378 | ret_val = netlbl_domhsh_add(entry, audit_info); |
379 | if (ret_val != 0) | |
6c2e8ac0 | 380 | goto cfg_cipsov4_map_add_failure; |
b1edeb10 | 381 | |
6c2e8ac0 | 382 | return 0; |
b1edeb10 | 383 | |
6c2e8ac0 | 384 | cfg_cipsov4_map_add_failure: |
94a80d63 JL |
385 | kfree(addrinfo); |
386 | out_addrinfo: | |
387 | kfree(addrmap); | |
388 | out_addrmap: | |
47943234 | 389 | kfree(entry->domain); |
94a80d63 | 390 | out_domain: |
eda61d32 | 391 | kfree(entry); |
94a80d63 JL |
392 | out_entry: |
393 | cipso_v4_doi_putdef(doi_def); | |
6c2e8ac0 | 394 | return ret_val; |
eda61d32 PM |
395 | } |
396 | ||
3f09354a HD |
397 | /** |
398 | * netlbl_cfg_calipso_add - Add a new CALIPSO DOI definition | |
399 | * @doi_def: CALIPSO DOI definition | |
400 | * @audit_info: NetLabel audit information | |
401 | * | |
402 | * Description: | |
403 | * Add a new CALIPSO DOI definition as defined by @doi_def. Returns zero on | |
404 | * success and negative values on failure. | |
405 | * | |
406 | */ | |
407 | int netlbl_cfg_calipso_add(struct calipso_doi *doi_def, | |
408 | struct netlbl_audit *audit_info) | |
409 | { | |
410 | #if IS_ENABLED(CONFIG_IPV6) | |
411 | return calipso_doi_add(doi_def, audit_info); | |
412 | #else /* IPv6 */ | |
413 | return -ENOSYS; | |
414 | #endif /* IPv6 */ | |
415 | } | |
416 | ||
417 | /** | |
418 | * netlbl_cfg_calipso_del - Remove an existing CALIPSO DOI definition | |
419 | * @doi: CALIPSO DOI | |
420 | * @audit_info: NetLabel audit information | |
421 | * | |
422 | * Description: | |
423 | * Remove an existing CALIPSO DOI definition matching @doi. Returns zero on | |
424 | * success and negative values on failure. | |
425 | * | |
426 | */ | |
427 | void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info) | |
428 | { | |
429 | #if IS_ENABLED(CONFIG_IPV6) | |
430 | calipso_doi_remove(doi, audit_info); | |
431 | #endif /* IPv6 */ | |
432 | } | |
433 | ||
434 | /** | |
435 | * netlbl_cfg_calipso_map_add - Add a new CALIPSO DOI mapping | |
436 | * @doi: the CALIPSO DOI | |
437 | * @domain: the domain mapping to add | |
438 | * @addr: IP address | |
439 | * @mask: IP address mask | |
440 | * @audit_info: NetLabel audit information | |
441 | * | |
442 | * Description: | |
443 | * Add a new NetLabel/LSM domain mapping for the given CALIPSO DOI to the | |
444 | * NetLabel subsystem. A @domain value of NULL adds a new default domain | |
445 | * mapping. Returns zero on success, negative values on failure. | |
446 | * | |
447 | */ | |
448 | int netlbl_cfg_calipso_map_add(u32 doi, | |
449 | const char *domain, | |
450 | const struct in6_addr *addr, | |
451 | const struct in6_addr *mask, | |
452 | struct netlbl_audit *audit_info) | |
453 | { | |
454 | #if IS_ENABLED(CONFIG_IPV6) | |
455 | int ret_val = -ENOMEM; | |
456 | struct calipso_doi *doi_def; | |
457 | struct netlbl_dom_map *entry; | |
458 | struct netlbl_domaddr_map *addrmap = NULL; | |
459 | struct netlbl_domaddr6_map *addrinfo = NULL; | |
460 | ||
461 | doi_def = calipso_doi_getdef(doi); | |
462 | if (doi_def == NULL) | |
463 | return -ENOENT; | |
464 | ||
465 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
466 | if (entry == NULL) | |
467 | goto out_entry; | |
468 | entry->family = AF_INET6; | |
469 | if (domain != NULL) { | |
470 | entry->domain = kstrdup(domain, GFP_ATOMIC); | |
471 | if (entry->domain == NULL) | |
472 | goto out_domain; | |
473 | } | |
474 | ||
475 | if (addr == NULL && mask == NULL) { | |
476 | entry->def.calipso = doi_def; | |
477 | entry->def.type = NETLBL_NLTYPE_CALIPSO; | |
478 | } else if (addr != NULL && mask != NULL) { | |
479 | addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC); | |
480 | if (addrmap == NULL) | |
481 | goto out_addrmap; | |
482 | INIT_LIST_HEAD(&addrmap->list4); | |
483 | INIT_LIST_HEAD(&addrmap->list6); | |
484 | ||
485 | addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC); | |
486 | if (addrinfo == NULL) | |
487 | goto out_addrinfo; | |
488 | addrinfo->def.calipso = doi_def; | |
489 | addrinfo->def.type = NETLBL_NLTYPE_CALIPSO; | |
490 | addrinfo->list.addr = *addr; | |
491 | addrinfo->list.addr.s6_addr32[0] &= mask->s6_addr32[0]; | |
492 | addrinfo->list.addr.s6_addr32[1] &= mask->s6_addr32[1]; | |
493 | addrinfo->list.addr.s6_addr32[2] &= mask->s6_addr32[2]; | |
494 | addrinfo->list.addr.s6_addr32[3] &= mask->s6_addr32[3]; | |
495 | addrinfo->list.mask = *mask; | |
496 | addrinfo->list.valid = 1; | |
497 | ret_val = netlbl_af6list_add(&addrinfo->list, &addrmap->list6); | |
498 | if (ret_val != 0) | |
499 | goto cfg_calipso_map_add_failure; | |
500 | ||
501 | entry->def.addrsel = addrmap; | |
502 | entry->def.type = NETLBL_NLTYPE_ADDRSELECT; | |
503 | } else { | |
504 | ret_val = -EINVAL; | |
505 | goto out_addrmap; | |
506 | } | |
507 | ||
508 | ret_val = netlbl_domhsh_add(entry, audit_info); | |
509 | if (ret_val != 0) | |
510 | goto cfg_calipso_map_add_failure; | |
511 | ||
512 | return 0; | |
513 | ||
514 | cfg_calipso_map_add_failure: | |
515 | kfree(addrinfo); | |
516 | out_addrinfo: | |
517 | kfree(addrmap); | |
518 | out_addrmap: | |
519 | kfree(entry->domain); | |
520 | out_domain: | |
521 | kfree(entry); | |
522 | out_entry: | |
523 | calipso_doi_putdef(doi_def); | |
524 | return ret_val; | |
525 | #else /* IPv6 */ | |
526 | return -ENOSYS; | |
527 | #endif /* IPv6 */ | |
528 | } | |
529 | ||
02752760 PM |
530 | /* |
531 | * Security Attribute Functions | |
532 | */ | |
533 | ||
4b8feff2 PM |
534 | #define _CM_F_NONE 0x00000000 |
535 | #define _CM_F_ALLOC 0x00000001 | |
d960a618 | 536 | #define _CM_F_WALK 0x00000002 |
4b8feff2 PM |
537 | |
538 | /** | |
4fbe63d1 | 539 | * _netlbl_catmap_getnode - Get a individual node from a catmap |
4b8feff2 PM |
540 | * @catmap: pointer to the category bitmap |
541 | * @offset: the requested offset | |
542 | * @cm_flags: catmap flags, see _CM_F_* | |
543 | * @gfp_flags: memory allocation flags | |
544 | * | |
545 | * Description: | |
d960a618 PM |
546 | * Iterate through the catmap looking for the node associated with @offset. |
547 | * If the _CM_F_ALLOC flag is set in @cm_flags and there is no associated node, | |
548 | * one will be created and inserted into the catmap. If the _CM_F_WALK flag is | |
549 | * set in @cm_flags and there is no associated node, the next highest node will | |
550 | * be returned. Returns a pointer to the node on success, NULL on failure. | |
4b8feff2 PM |
551 | * |
552 | */ | |
4fbe63d1 PM |
553 | static struct netlbl_lsm_catmap *_netlbl_catmap_getnode( |
554 | struct netlbl_lsm_catmap **catmap, | |
555 | u32 offset, | |
556 | unsigned int cm_flags, | |
557 | gfp_t gfp_flags) | |
4b8feff2 | 558 | { |
4fbe63d1 PM |
559 | struct netlbl_lsm_catmap *iter = *catmap; |
560 | struct netlbl_lsm_catmap *prev = NULL; | |
4b8feff2 | 561 | |
d960a618 | 562 | if (iter == NULL) |
4fbe63d1 | 563 | goto catmap_getnode_alloc; |
d960a618 | 564 | if (offset < iter->startbit) |
4fbe63d1 | 565 | goto catmap_getnode_walk; |
4b8feff2 PM |
566 | while (iter && offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) { |
567 | prev = iter; | |
568 | iter = iter->next; | |
569 | } | |
570 | if (iter == NULL || offset < iter->startbit) | |
4fbe63d1 | 571 | goto catmap_getnode_walk; |
4b8feff2 PM |
572 | |
573 | return iter; | |
574 | ||
4fbe63d1 | 575 | catmap_getnode_walk: |
d960a618 PM |
576 | if (cm_flags & _CM_F_WALK) |
577 | return iter; | |
4fbe63d1 | 578 | catmap_getnode_alloc: |
4b8feff2 PM |
579 | if (!(cm_flags & _CM_F_ALLOC)) |
580 | return NULL; | |
581 | ||
4fbe63d1 | 582 | iter = netlbl_catmap_alloc(gfp_flags); |
4b8feff2 PM |
583 | if (iter == NULL) |
584 | return NULL; | |
585 | iter->startbit = offset & ~(NETLBL_CATMAP_SIZE - 1); | |
586 | ||
587 | if (prev == NULL) { | |
588 | iter->next = *catmap; | |
589 | *catmap = iter; | |
590 | } else { | |
591 | iter->next = prev->next; | |
592 | prev->next = iter; | |
593 | } | |
594 | ||
595 | return iter; | |
596 | } | |
597 | ||
02752760 | 598 | /** |
4fbe63d1 | 599 | * netlbl_catmap_walk - Walk a LSM secattr catmap looking for a bit |
02752760 PM |
600 | * @catmap: the category bitmap |
601 | * @offset: the offset to start searching at, in bits | |
602 | * | |
603 | * Description: | |
604 | * This function walks a LSM secattr category bitmap starting at @offset and | |
605 | * returns the spot of the first set bit or -ENOENT if no bits are set. | |
606 | * | |
607 | */ | |
4fbe63d1 | 608 | int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset) |
02752760 | 609 | { |
56fcd40f | 610 | struct netlbl_lsm_catmap *iter; |
d960a618 PM |
611 | u32 idx; |
612 | u32 bit; | |
02752760 PM |
613 | NETLBL_CATMAP_MAPTYPE bitmap; |
614 | ||
4fbe63d1 | 615 | iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0); |
d960a618 PM |
616 | if (iter == NULL) |
617 | return -ENOENT; | |
02752760 | 618 | if (offset > iter->startbit) { |
d960a618 PM |
619 | offset -= iter->startbit; |
620 | idx = offset / NETLBL_CATMAP_MAPSIZE; | |
621 | bit = offset % NETLBL_CATMAP_MAPSIZE; | |
02752760 | 622 | } else { |
d960a618 PM |
623 | idx = 0; |
624 | bit = 0; | |
02752760 | 625 | } |
d960a618 | 626 | bitmap = iter->bitmap[idx] >> bit; |
02752760 PM |
627 | |
628 | for (;;) { | |
629 | if (bitmap != 0) { | |
630 | while ((bitmap & NETLBL_CATMAP_BIT) == 0) { | |
631 | bitmap >>= 1; | |
d960a618 | 632 | bit++; |
02752760 PM |
633 | } |
634 | return iter->startbit + | |
d960a618 | 635 | (NETLBL_CATMAP_MAPSIZE * idx) + bit; |
02752760 | 636 | } |
d960a618 | 637 | if (++idx >= NETLBL_CATMAP_MAPCNT) { |
02752760 PM |
638 | if (iter->next != NULL) { |
639 | iter = iter->next; | |
d960a618 | 640 | idx = 0; |
02752760 PM |
641 | } else |
642 | return -ENOENT; | |
643 | } | |
d960a618 PM |
644 | bitmap = iter->bitmap[idx]; |
645 | bit = 0; | |
02752760 PM |
646 | } |
647 | ||
648 | return -ENOENT; | |
649 | } | |
ceba1832 | 650 | EXPORT_SYMBOL(netlbl_catmap_walk); |
02752760 PM |
651 | |
652 | /** | |
4fbe63d1 | 653 | * netlbl_catmap_walkrng - Find the end of a string of set bits |
02752760 PM |
654 | * @catmap: the category bitmap |
655 | * @offset: the offset to start searching at, in bits | |
656 | * | |
657 | * Description: | |
658 | * This function walks a LSM secattr category bitmap starting at @offset and | |
659 | * returns the spot of the first cleared bit or -ENOENT if the offset is past | |
660 | * the end of the bitmap. | |
661 | * | |
662 | */ | |
4fbe63d1 | 663 | int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset) |
02752760 | 664 | { |
4fbe63d1 PM |
665 | struct netlbl_lsm_catmap *iter; |
666 | struct netlbl_lsm_catmap *prev = NULL; | |
d960a618 PM |
667 | u32 idx; |
668 | u32 bit; | |
02752760 PM |
669 | NETLBL_CATMAP_MAPTYPE bitmask; |
670 | NETLBL_CATMAP_MAPTYPE bitmap; | |
671 | ||
4fbe63d1 | 672 | iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0); |
d960a618 PM |
673 | if (iter == NULL) |
674 | return -ENOENT; | |
02752760 | 675 | if (offset > iter->startbit) { |
d960a618 PM |
676 | offset -= iter->startbit; |
677 | idx = offset / NETLBL_CATMAP_MAPSIZE; | |
678 | bit = offset % NETLBL_CATMAP_MAPSIZE; | |
02752760 | 679 | } else { |
d960a618 PM |
680 | idx = 0; |
681 | bit = 0; | |
02752760 | 682 | } |
d960a618 | 683 | bitmask = NETLBL_CATMAP_BIT << bit; |
02752760 PM |
684 | |
685 | for (;;) { | |
d960a618 | 686 | bitmap = iter->bitmap[idx]; |
02752760 PM |
687 | while (bitmask != 0 && (bitmap & bitmask) != 0) { |
688 | bitmask <<= 1; | |
d960a618 | 689 | bit++; |
02752760 PM |
690 | } |
691 | ||
d960a618 PM |
692 | if (prev && idx == 0 && bit == 0) |
693 | return prev->startbit + NETLBL_CATMAP_SIZE - 1; | |
694 | else if (bitmask != 0) | |
02752760 | 695 | return iter->startbit + |
d960a618 PM |
696 | (NETLBL_CATMAP_MAPSIZE * idx) + bit - 1; |
697 | else if (++idx >= NETLBL_CATMAP_MAPCNT) { | |
02752760 | 698 | if (iter->next == NULL) |
d960a618 PM |
699 | return iter->startbit + NETLBL_CATMAP_SIZE - 1; |
700 | prev = iter; | |
02752760 | 701 | iter = iter->next; |
d960a618 | 702 | idx = 0; |
02752760 PM |
703 | } |
704 | bitmask = NETLBL_CATMAP_BIT; | |
d960a618 | 705 | bit = 0; |
02752760 PM |
706 | } |
707 | ||
708 | return -ENOENT; | |
709 | } | |
710 | ||
4b8feff2 | 711 | /** |
4fbe63d1 | 712 | * netlbl_catmap_getlong - Export an unsigned long bitmap |
4b8feff2 PM |
713 | * @catmap: pointer to the category bitmap |
714 | * @offset: pointer to the requested offset | |
715 | * @bitmap: the exported bitmap | |
716 | * | |
717 | * Description: | |
718 | * Export a bitmap with an offset greater than or equal to @offset and return | |
719 | * it in @bitmap. The @offset must be aligned to an unsigned long and will be | |
720 | * updated on return if different from what was requested; if the catmap is | |
721 | * empty at the requested offset and beyond, the @offset is set to (u32)-1. | |
722 | * Returns zero on sucess, negative values on failure. | |
723 | * | |
724 | */ | |
4fbe63d1 PM |
725 | int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap, |
726 | u32 *offset, | |
727 | unsigned long *bitmap) | |
4b8feff2 | 728 | { |
4fbe63d1 | 729 | struct netlbl_lsm_catmap *iter; |
4b8feff2 PM |
730 | u32 off = *offset; |
731 | u32 idx; | |
732 | ||
733 | /* only allow aligned offsets */ | |
734 | if ((off & (BITS_PER_LONG - 1)) != 0) | |
735 | return -EINVAL; | |
736 | ||
737 | if (off < catmap->startbit) { | |
738 | off = catmap->startbit; | |
739 | *offset = off; | |
740 | } | |
50b8629a | 741 | iter = _netlbl_catmap_getnode(&catmap, off, _CM_F_WALK, 0); |
4b8feff2 PM |
742 | if (iter == NULL) { |
743 | *offset = (u32)-1; | |
744 | return 0; | |
745 | } | |
746 | ||
747 | if (off < iter->startbit) { | |
50b8629a PM |
748 | *offset = iter->startbit; |
749 | off = 0; | |
4b8feff2 PM |
750 | } else |
751 | off -= iter->startbit; | |
4b8feff2 | 752 | idx = off / NETLBL_CATMAP_MAPSIZE; |
50b8629a | 753 | *bitmap = iter->bitmap[idx] >> (off % NETLBL_CATMAP_MAPSIZE); |
4b8feff2 PM |
754 | |
755 | return 0; | |
756 | } | |
757 | ||
02752760 | 758 | /** |
4fbe63d1 | 759 | * netlbl_catmap_setbit - Set a bit in a LSM secattr catmap |
41c3bd20 | 760 | * @catmap: pointer to the category bitmap |
02752760 PM |
761 | * @bit: the bit to set |
762 | * @flags: memory allocation flags | |
763 | * | |
764 | * Description: | |
765 | * Set the bit specified by @bit in @catmap. Returns zero on success, | |
766 | * negative values on failure. | |
767 | * | |
768 | */ | |
4fbe63d1 PM |
769 | int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap, |
770 | u32 bit, | |
771 | gfp_t flags) | |
02752760 | 772 | { |
4fbe63d1 | 773 | struct netlbl_lsm_catmap *iter; |
4b8feff2 | 774 | u32 idx; |
02752760 | 775 | |
4fbe63d1 | 776 | iter = _netlbl_catmap_getnode(catmap, bit, _CM_F_ALLOC, flags); |
4b8feff2 PM |
777 | if (iter == NULL) |
778 | return -ENOMEM; | |
02752760 | 779 | |
4b8feff2 PM |
780 | bit -= iter->startbit; |
781 | idx = bit / NETLBL_CATMAP_MAPSIZE; | |
782 | iter->bitmap[idx] |= NETLBL_CATMAP_BIT << (bit % NETLBL_CATMAP_MAPSIZE); | |
02752760 PM |
783 | |
784 | return 0; | |
785 | } | |
ceba1832 | 786 | EXPORT_SYMBOL(netlbl_catmap_setbit); |
02752760 PM |
787 | |
788 | /** | |
4fbe63d1 | 789 | * netlbl_catmap_setrng - Set a range of bits in a LSM secattr catmap |
41c3bd20 | 790 | * @catmap: pointer to the category bitmap |
02752760 PM |
791 | * @start: the starting bit |
792 | * @end: the last bit in the string | |
793 | * @flags: memory allocation flags | |
794 | * | |
795 | * Description: | |
796 | * Set a range of bits, starting at @start and ending with @end. Returns zero | |
797 | * on success, negative values on failure. | |
798 | * | |
799 | */ | |
4fbe63d1 PM |
800 | int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap, |
801 | u32 start, | |
802 | u32 end, | |
803 | gfp_t flags) | |
02752760 | 804 | { |
4b8feff2 PM |
805 | int rc = 0; |
806 | u32 spot = start; | |
807 | ||
808 | while (rc == 0 && spot <= end) { | |
341e0cb5 | 809 | if (((spot & (BITS_PER_LONG - 1)) == 0) && |
4b8feff2 | 810 | ((end - spot) > BITS_PER_LONG)) { |
4fbe63d1 PM |
811 | rc = netlbl_catmap_setlong(catmap, |
812 | spot, | |
813 | (unsigned long)-1, | |
814 | flags); | |
4b8feff2 PM |
815 | spot += BITS_PER_LONG; |
816 | } else | |
4fbe63d1 | 817 | rc = netlbl_catmap_setbit(catmap, spot++, flags); |
02752760 PM |
818 | } |
819 | ||
4b8feff2 PM |
820 | return rc; |
821 | } | |
822 | ||
823 | /** | |
4fbe63d1 | 824 | * netlbl_catmap_setlong - Import an unsigned long bitmap |
4b8feff2 PM |
825 | * @catmap: pointer to the category bitmap |
826 | * @offset: offset to the start of the imported bitmap | |
827 | * @bitmap: the bitmap to import | |
828 | * @flags: memory allocation flags | |
829 | * | |
830 | * Description: | |
831 | * Import the bitmap specified in @bitmap into @catmap, using the offset | |
832 | * in @offset. The offset must be aligned to an unsigned long. Returns zero | |
833 | * on success, negative values on failure. | |
834 | * | |
835 | */ | |
4fbe63d1 PM |
836 | int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap, |
837 | u32 offset, | |
838 | unsigned long bitmap, | |
839 | gfp_t flags) | |
4b8feff2 | 840 | { |
4fbe63d1 | 841 | struct netlbl_lsm_catmap *iter; |
4b8feff2 PM |
842 | u32 idx; |
843 | ||
844 | /* only allow aligned offsets */ | |
845 | if ((offset & (BITS_PER_LONG - 1)) != 0) | |
846 | return -EINVAL; | |
847 | ||
4fbe63d1 | 848 | iter = _netlbl_catmap_getnode(catmap, offset, _CM_F_ALLOC, flags); |
4b8feff2 PM |
849 | if (iter == NULL) |
850 | return -ENOMEM; | |
851 | ||
852 | offset -= iter->startbit; | |
853 | idx = offset / NETLBL_CATMAP_MAPSIZE; | |
854 | iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE); | |
855 | ||
856 | return 0; | |
02752760 PM |
857 | } |
858 | ||
3faa8f98 HD |
859 | /* Bitmap functions |
860 | */ | |
861 | ||
862 | /** | |
863 | * netlbl_bitmap_walk - Walk a bitmap looking for a bit | |
864 | * @bitmap: the bitmap | |
865 | * @bitmap_len: length in bits | |
866 | * @offset: starting offset | |
867 | * @state: if non-zero, look for a set (1) bit else look for a cleared (0) bit | |
868 | * | |
869 | * Description: | |
870 | * Starting at @offset, walk the bitmap from left to right until either the | |
871 | * desired bit is found or we reach the end. Return the bit offset, -1 if | |
872 | * not found, or -2 if error. | |
873 | */ | |
874 | int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len, | |
875 | u32 offset, u8 state) | |
876 | { | |
877 | u32 bit_spot; | |
878 | u32 byte_offset; | |
879 | unsigned char bitmask; | |
880 | unsigned char byte; | |
881 | ||
882 | byte_offset = offset / 8; | |
883 | byte = bitmap[byte_offset]; | |
884 | bit_spot = offset; | |
885 | bitmask = 0x80 >> (offset % 8); | |
886 | ||
887 | while (bit_spot < bitmap_len) { | |
888 | if ((state && (byte & bitmask) == bitmask) || | |
889 | (state == 0 && (byte & bitmask) == 0)) | |
890 | return bit_spot; | |
891 | ||
5578de48 PM |
892 | if (++bit_spot >= bitmap_len) |
893 | return -1; | |
3faa8f98 HD |
894 | bitmask >>= 1; |
895 | if (bitmask == 0) { | |
896 | byte = bitmap[++byte_offset]; | |
897 | bitmask = 0x80; | |
898 | } | |
899 | } | |
900 | ||
901 | return -1; | |
902 | } | |
903 | EXPORT_SYMBOL(netlbl_bitmap_walk); | |
904 | ||
905 | /** | |
906 | * netlbl_bitmap_setbit - Sets a single bit in a bitmap | |
907 | * @bitmap: the bitmap | |
908 | * @bit: the bit | |
909 | * @state: if non-zero, set the bit (1) else clear the bit (0) | |
910 | * | |
911 | * Description: | |
912 | * Set a single bit in the bitmask. Returns zero on success, negative values | |
913 | * on error. | |
914 | */ | |
915 | void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state) | |
916 | { | |
917 | u32 byte_spot; | |
918 | u8 bitmask; | |
919 | ||
920 | /* gcc always rounds to zero when doing integer division */ | |
921 | byte_spot = bit / 8; | |
922 | bitmask = 0x80 >> (bit % 8); | |
923 | if (state) | |
924 | bitmap[byte_spot] |= bitmask; | |
925 | else | |
926 | bitmap[byte_spot] &= ~bitmask; | |
927 | } | |
928 | EXPORT_SYMBOL(netlbl_bitmap_setbit); | |
929 | ||
d15c345f PM |
930 | /* |
931 | * LSM Functions | |
932 | */ | |
933 | ||
23bcdc1a PM |
934 | /** |
935 | * netlbl_enabled - Determine if the NetLabel subsystem is enabled | |
936 | * | |
937 | * Description: | |
938 | * The LSM can use this function to determine if it should use NetLabel | |
939 | * security attributes in it's enforcement mechanism. Currently, NetLabel is | |
940 | * considered to be enabled when it's configuration contains a valid setup for | |
941 | * at least one labeled protocol (i.e. NetLabel can understand incoming | |
942 | * labeled packets of at least one type); otherwise NetLabel is considered to | |
943 | * be disabled. | |
944 | * | |
945 | */ | |
946 | int netlbl_enabled(void) | |
947 | { | |
948 | /* At some point we probably want to expose this mechanism to the user | |
949 | * as well so that admins can toggle NetLabel regardless of the | |
950 | * configuration */ | |
c783f1ce | 951 | return (atomic_read(&netlabel_mgmt_protocount) > 0); |
23bcdc1a PM |
952 | } |
953 | ||
d15c345f | 954 | /** |
389fb800 | 955 | * netlbl_sock_setattr - Label a socket using the correct protocol |
ba6ff9f2 | 956 | * @sk: the socket to label |
389fb800 | 957 | * @family: protocol family |
d15c345f PM |
958 | * @secattr: the security attributes |
959 | * | |
960 | * Description: | |
961 | * Attach the correct label to the given socket using the security attributes | |
ba6ff9f2 PM |
962 | * specified in @secattr. This function requires exclusive access to @sk, |
963 | * which means it either needs to be in the process of being created or locked. | |
63c41688 PM |
964 | * Returns zero on success, -EDESTADDRREQ if the domain is configured to use |
965 | * network address selectors (can't blindly label the socket), and negative | |
966 | * values on all other failures. | |
d15c345f PM |
967 | * |
968 | */ | |
ba6ff9f2 | 969 | int netlbl_sock_setattr(struct sock *sk, |
389fb800 | 970 | u16 family, |
ba6ff9f2 | 971 | const struct netlbl_lsm_secattr *secattr) |
d15c345f | 972 | { |
389fb800 | 973 | int ret_val; |
d15c345f PM |
974 | struct netlbl_dom_map *dom_entry; |
975 | ||
976 | rcu_read_lock(); | |
8f18e675 | 977 | dom_entry = netlbl_domhsh_getentry(secattr->domain, family); |
389fb800 PM |
978 | if (dom_entry == NULL) { |
979 | ret_val = -ENOENT; | |
d15c345f | 980 | goto socket_setattr_return; |
389fb800 PM |
981 | } |
982 | switch (family) { | |
983 | case AF_INET: | |
6a8b7f0c | 984 | switch (dom_entry->def.type) { |
389fb800 PM |
985 | case NETLBL_NLTYPE_ADDRSELECT: |
986 | ret_val = -EDESTADDRREQ; | |
987 | break; | |
988 | case NETLBL_NLTYPE_CIPSOV4: | |
989 | ret_val = cipso_v4_sock_setattr(sk, | |
6a8b7f0c PM |
990 | dom_entry->def.cipso, |
991 | secattr); | |
389fb800 PM |
992 | break; |
993 | case NETLBL_NLTYPE_UNLABELED: | |
994 | ret_val = 0; | |
995 | break; | |
996 | default: | |
997 | ret_val = -ENOENT; | |
998 | } | |
d15c345f | 999 | break; |
dfd56b8b | 1000 | #if IS_ENABLED(CONFIG_IPV6) |
389fb800 | 1001 | case AF_INET6: |
ceba1832 HD |
1002 | switch (dom_entry->def.type) { |
1003 | case NETLBL_NLTYPE_ADDRSELECT: | |
1004 | ret_val = -EDESTADDRREQ; | |
1005 | break; | |
1006 | case NETLBL_NLTYPE_CALIPSO: | |
1007 | ret_val = calipso_sock_setattr(sk, | |
1008 | dom_entry->def.calipso, | |
1009 | secattr); | |
1010 | break; | |
1011 | case NETLBL_NLTYPE_UNLABELED: | |
1012 | ret_val = 0; | |
1013 | break; | |
1014 | default: | |
1015 | ret_val = -ENOENT; | |
1016 | } | |
d15c345f | 1017 | break; |
389fb800 | 1018 | #endif /* IPv6 */ |
d15c345f | 1019 | default: |
389fb800 | 1020 | ret_val = -EPROTONOSUPPORT; |
d15c345f PM |
1021 | } |
1022 | ||
1023 | socket_setattr_return: | |
1024 | rcu_read_unlock(); | |
1025 | return ret_val; | |
1026 | } | |
1027 | ||
014ab19a PM |
1028 | /** |
1029 | * netlbl_sock_delattr - Delete all the NetLabel labels on a socket | |
1030 | * @sk: the socket | |
1031 | * | |
1032 | * Description: | |
1033 | * Remove all the NetLabel labeling from @sk. The caller is responsible for | |
1034 | * ensuring that @sk is locked. | |
1035 | * | |
1036 | */ | |
1037 | void netlbl_sock_delattr(struct sock *sk) | |
1038 | { | |
0e0e3677 PM |
1039 | switch (sk->sk_family) { |
1040 | case AF_INET: | |
1041 | cipso_v4_sock_delattr(sk); | |
1042 | break; | |
ceba1832 HD |
1043 | #if IS_ENABLED(CONFIG_IPV6) |
1044 | case AF_INET6: | |
1045 | calipso_sock_delattr(sk); | |
1046 | break; | |
1047 | #endif /* IPv6 */ | |
0e0e3677 | 1048 | } |
014ab19a PM |
1049 | } |
1050 | ||
14a72f53 PM |
1051 | /** |
1052 | * netlbl_sock_getattr - Determine the security attributes of a sock | |
1053 | * @sk: the sock | |
1054 | * @secattr: the security attributes | |
1055 | * | |
1056 | * Description: | |
8cc44579 | 1057 | * Examines the given sock to see if any NetLabel style labeling has been |
14a72f53 PM |
1058 | * applied to the sock, if so it parses the socket label and returns the |
1059 | * security attributes in @secattr. Returns zero on success, negative values | |
1060 | * on failure. | |
1061 | * | |
1062 | */ | |
389fb800 PM |
1063 | int netlbl_sock_getattr(struct sock *sk, |
1064 | struct netlbl_lsm_secattr *secattr) | |
14a72f53 | 1065 | { |
389fb800 PM |
1066 | int ret_val; |
1067 | ||
1068 | switch (sk->sk_family) { | |
1069 | case AF_INET: | |
1070 | ret_val = cipso_v4_sock_getattr(sk, secattr); | |
1071 | break; | |
dfd56b8b | 1072 | #if IS_ENABLED(CONFIG_IPV6) |
389fb800 | 1073 | case AF_INET6: |
ceba1832 | 1074 | ret_val = calipso_sock_getattr(sk, secattr); |
389fb800 PM |
1075 | break; |
1076 | #endif /* IPv6 */ | |
1077 | default: | |
1078 | ret_val = -EPROTONOSUPPORT; | |
1079 | } | |
1080 | ||
1081 | return ret_val; | |
14a72f53 PM |
1082 | } |
1083 | ||
014ab19a PM |
1084 | /** |
1085 | * netlbl_conn_setattr - Label a connected socket using the correct protocol | |
1086 | * @sk: the socket to label | |
1087 | * @addr: the destination address | |
1088 | * @secattr: the security attributes | |
1089 | * | |
1090 | * Description: | |
1091 | * Attach the correct label to the given connected socket using the security | |
1092 | * attributes specified in @secattr. The caller is responsible for ensuring | |
1093 | * that @sk is locked. Returns zero on success, negative values on failure. | |
1094 | * | |
1095 | */ | |
1096 | int netlbl_conn_setattr(struct sock *sk, | |
1097 | struct sockaddr *addr, | |
1098 | const struct netlbl_lsm_secattr *secattr) | |
1099 | { | |
1100 | int ret_val; | |
1101 | struct sockaddr_in *addr4; | |
ceba1832 HD |
1102 | #if IS_ENABLED(CONFIG_IPV6) |
1103 | struct sockaddr_in6 *addr6; | |
1104 | #endif | |
6a8b7f0c | 1105 | struct netlbl_dommap_def *entry; |
014ab19a PM |
1106 | |
1107 | rcu_read_lock(); | |
1108 | switch (addr->sa_family) { | |
1109 | case AF_INET: | |
1110 | addr4 = (struct sockaddr_in *)addr; | |
6a8b7f0c PM |
1111 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
1112 | addr4->sin_addr.s_addr); | |
1113 | if (entry == NULL) { | |
014ab19a PM |
1114 | ret_val = -ENOENT; |
1115 | goto conn_setattr_return; | |
1116 | } | |
6a8b7f0c | 1117 | switch (entry->type) { |
014ab19a PM |
1118 | case NETLBL_NLTYPE_CIPSOV4: |
1119 | ret_val = cipso_v4_sock_setattr(sk, | |
6a8b7f0c | 1120 | entry->cipso, secattr); |
014ab19a PM |
1121 | break; |
1122 | case NETLBL_NLTYPE_UNLABELED: | |
1123 | /* just delete the protocols we support for right now | |
1124 | * but we could remove other protocols if needed */ | |
ceba1832 | 1125 | netlbl_sock_delattr(sk); |
014ab19a PM |
1126 | ret_val = 0; |
1127 | break; | |
1128 | default: | |
1129 | ret_val = -ENOENT; | |
1130 | } | |
1131 | break; | |
dfd56b8b | 1132 | #if IS_ENABLED(CONFIG_IPV6) |
014ab19a | 1133 | case AF_INET6: |
ceba1832 HD |
1134 | addr6 = (struct sockaddr_in6 *)addr; |
1135 | entry = netlbl_domhsh_getentry_af6(secattr->domain, | |
1136 | &addr6->sin6_addr); | |
1137 | if (entry == NULL) { | |
1138 | ret_val = -ENOENT; | |
1139 | goto conn_setattr_return; | |
1140 | } | |
1141 | switch (entry->type) { | |
1142 | case NETLBL_NLTYPE_CALIPSO: | |
1143 | ret_val = calipso_sock_setattr(sk, | |
1144 | entry->calipso, secattr); | |
1145 | break; | |
1146 | case NETLBL_NLTYPE_UNLABELED: | |
1147 | /* just delete the protocols we support for right now | |
1148 | * but we could remove other protocols if needed */ | |
1149 | netlbl_sock_delattr(sk); | |
1150 | ret_val = 0; | |
1151 | break; | |
1152 | default: | |
1153 | ret_val = -ENOENT; | |
1154 | } | |
014ab19a PM |
1155 | break; |
1156 | #endif /* IPv6 */ | |
1157 | default: | |
389fb800 | 1158 | ret_val = -EPROTONOSUPPORT; |
014ab19a PM |
1159 | } |
1160 | ||
1161 | conn_setattr_return: | |
1162 | rcu_read_unlock(); | |
1163 | return ret_val; | |
1164 | } | |
1165 | ||
389fb800 PM |
1166 | /** |
1167 | * netlbl_req_setattr - Label a request socket using the correct protocol | |
1168 | * @req: the request socket to label | |
1169 | * @secattr: the security attributes | |
1170 | * | |
1171 | * Description: | |
1172 | * Attach the correct label to the given socket using the security attributes | |
1173 | * specified in @secattr. Returns zero on success, negative values on failure. | |
1174 | * | |
1175 | */ | |
1176 | int netlbl_req_setattr(struct request_sock *req, | |
1177 | const struct netlbl_lsm_secattr *secattr) | |
1178 | { | |
1179 | int ret_val; | |
6a8b7f0c | 1180 | struct netlbl_dommap_def *entry; |
e1adea92 | 1181 | struct inet_request_sock *ireq = inet_rsk(req); |
389fb800 PM |
1182 | |
1183 | rcu_read_lock(); | |
389fb800 PM |
1184 | switch (req->rsk_ops->family) { |
1185 | case AF_INET: | |
6a8b7f0c | 1186 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
e1adea92 | 1187 | ireq->ir_rmt_addr); |
6a8b7f0c PM |
1188 | if (entry == NULL) { |
1189 | ret_val = -ENOENT; | |
1190 | goto req_setattr_return; | |
389fb800 | 1191 | } |
6a8b7f0c | 1192 | switch (entry->type) { |
389fb800 | 1193 | case NETLBL_NLTYPE_CIPSOV4: |
6a8b7f0c PM |
1194 | ret_val = cipso_v4_req_setattr(req, |
1195 | entry->cipso, secattr); | |
389fb800 PM |
1196 | break; |
1197 | case NETLBL_NLTYPE_UNLABELED: | |
e1adea92 | 1198 | netlbl_req_delattr(req); |
389fb800 PM |
1199 | ret_val = 0; |
1200 | break; | |
1201 | default: | |
1202 | ret_val = -ENOENT; | |
1203 | } | |
1204 | break; | |
dfd56b8b | 1205 | #if IS_ENABLED(CONFIG_IPV6) |
389fb800 | 1206 | case AF_INET6: |
e1adea92 HD |
1207 | entry = netlbl_domhsh_getentry_af6(secattr->domain, |
1208 | &ireq->ir_v6_rmt_addr); | |
1209 | if (entry == NULL) { | |
1210 | ret_val = -ENOENT; | |
1211 | goto req_setattr_return; | |
1212 | } | |
1213 | switch (entry->type) { | |
1214 | case NETLBL_NLTYPE_CALIPSO: | |
1215 | ret_val = calipso_req_setattr(req, | |
1216 | entry->calipso, secattr); | |
1217 | break; | |
1218 | case NETLBL_NLTYPE_UNLABELED: | |
1219 | netlbl_req_delattr(req); | |
1220 | ret_val = 0; | |
1221 | break; | |
1222 | default: | |
1223 | ret_val = -ENOENT; | |
1224 | } | |
389fb800 PM |
1225 | break; |
1226 | #endif /* IPv6 */ | |
1227 | default: | |
1228 | ret_val = -EPROTONOSUPPORT; | |
1229 | } | |
1230 | ||
1231 | req_setattr_return: | |
1232 | rcu_read_unlock(); | |
1233 | return ret_val; | |
1234 | } | |
1235 | ||
07feee8f PM |
1236 | /** |
1237 | * netlbl_req_delattr - Delete all the NetLabel labels on a socket | |
1238 | * @req: the socket | |
1239 | * | |
1240 | * Description: | |
1241 | * Remove all the NetLabel labeling from @req. | |
1242 | * | |
1243 | */ | |
1244 | void netlbl_req_delattr(struct request_sock *req) | |
1245 | { | |
0e0e3677 PM |
1246 | switch (req->rsk_ops->family) { |
1247 | case AF_INET: | |
1248 | cipso_v4_req_delattr(req); | |
1249 | break; | |
e1adea92 HD |
1250 | #if IS_ENABLED(CONFIG_IPV6) |
1251 | case AF_INET6: | |
1252 | calipso_req_delattr(req); | |
1253 | break; | |
1254 | #endif /* IPv6 */ | |
0e0e3677 | 1255 | } |
07feee8f PM |
1256 | } |
1257 | ||
948bf85c PM |
1258 | /** |
1259 | * netlbl_skbuff_setattr - Label a packet using the correct protocol | |
1260 | * @skb: the packet | |
1261 | * @family: protocol family | |
1262 | * @secattr: the security attributes | |
1263 | * | |
1264 | * Description: | |
1265 | * Attach the correct label to the given packet using the security attributes | |
1266 | * specified in @secattr. Returns zero on success, negative values on failure. | |
1267 | * | |
1268 | */ | |
1269 | int netlbl_skbuff_setattr(struct sk_buff *skb, | |
1270 | u16 family, | |
1271 | const struct netlbl_lsm_secattr *secattr) | |
1272 | { | |
1273 | int ret_val; | |
1274 | struct iphdr *hdr4; | |
2917f57b HD |
1275 | #if IS_ENABLED(CONFIG_IPV6) |
1276 | struct ipv6hdr *hdr6; | |
1277 | #endif | |
6a8b7f0c | 1278 | struct netlbl_dommap_def *entry; |
948bf85c PM |
1279 | |
1280 | rcu_read_lock(); | |
1281 | switch (family) { | |
1282 | case AF_INET: | |
1283 | hdr4 = ip_hdr(skb); | |
2917f57b HD |
1284 | entry = netlbl_domhsh_getentry_af4(secattr->domain, |
1285 | hdr4->daddr); | |
6a8b7f0c | 1286 | if (entry == NULL) { |
948bf85c PM |
1287 | ret_val = -ENOENT; |
1288 | goto skbuff_setattr_return; | |
1289 | } | |
6a8b7f0c | 1290 | switch (entry->type) { |
948bf85c | 1291 | case NETLBL_NLTYPE_CIPSOV4: |
6a8b7f0c PM |
1292 | ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso, |
1293 | secattr); | |
948bf85c PM |
1294 | break; |
1295 | case NETLBL_NLTYPE_UNLABELED: | |
1296 | /* just delete the protocols we support for right now | |
1297 | * but we could remove other protocols if needed */ | |
1298 | ret_val = cipso_v4_skbuff_delattr(skb); | |
1299 | break; | |
1300 | default: | |
1301 | ret_val = -ENOENT; | |
1302 | } | |
1303 | break; | |
dfd56b8b | 1304 | #if IS_ENABLED(CONFIG_IPV6) |
948bf85c | 1305 | case AF_INET6: |
2917f57b HD |
1306 | hdr6 = ipv6_hdr(skb); |
1307 | entry = netlbl_domhsh_getentry_af6(secattr->domain, | |
1308 | &hdr6->daddr); | |
1309 | if (entry == NULL) { | |
1310 | ret_val = -ENOENT; | |
1311 | goto skbuff_setattr_return; | |
1312 | } | |
1313 | switch (entry->type) { | |
1314 | case NETLBL_NLTYPE_CALIPSO: | |
1315 | ret_val = calipso_skbuff_setattr(skb, entry->calipso, | |
1316 | secattr); | |
1317 | break; | |
1318 | case NETLBL_NLTYPE_UNLABELED: | |
1319 | /* just delete the protocols we support for right now | |
1320 | * but we could remove other protocols if needed */ | |
1321 | ret_val = calipso_skbuff_delattr(skb); | |
1322 | break; | |
1323 | default: | |
1324 | ret_val = -ENOENT; | |
1325 | } | |
948bf85c PM |
1326 | break; |
1327 | #endif /* IPv6 */ | |
1328 | default: | |
389fb800 | 1329 | ret_val = -EPROTONOSUPPORT; |
948bf85c PM |
1330 | } |
1331 | ||
1332 | skbuff_setattr_return: | |
1333 | rcu_read_unlock(); | |
1334 | return ret_val; | |
1335 | } | |
1336 | ||
d15c345f PM |
1337 | /** |
1338 | * netlbl_skbuff_getattr - Determine the security attributes of a packet | |
1339 | * @skb: the packet | |
75e22910 | 1340 | * @family: protocol family |
d15c345f PM |
1341 | * @secattr: the security attributes |
1342 | * | |
1343 | * Description: | |
1344 | * Examines the given packet to see if a recognized form of packet labeling | |
1345 | * is present, if so it parses the packet label and returns the security | |
1346 | * attributes in @secattr. Returns zero on success, negative values on | |
1347 | * failure. | |
1348 | * | |
1349 | */ | |
1350 | int netlbl_skbuff_getattr(const struct sk_buff *skb, | |
75e22910 | 1351 | u16 family, |
d15c345f PM |
1352 | struct netlbl_lsm_secattr *secattr) |
1353 | { | |
04f81f01 PM |
1354 | unsigned char *ptr; |
1355 | ||
389fb800 PM |
1356 | switch (family) { |
1357 | case AF_INET: | |
04f81f01 PM |
1358 | ptr = cipso_v4_optptr(skb); |
1359 | if (ptr && cipso_v4_getattr(ptr, secattr) == 0) | |
389fb800 PM |
1360 | return 0; |
1361 | break; | |
dfd56b8b | 1362 | #if IS_ENABLED(CONFIG_IPV6) |
389fb800 | 1363 | case AF_INET6: |
2917f57b HD |
1364 | ptr = calipso_optptr(skb); |
1365 | if (ptr && calipso_getattr(ptr, secattr) == 0) | |
1366 | return 0; | |
389fb800 PM |
1367 | break; |
1368 | #endif /* IPv6 */ | |
1369 | } | |
d15c345f | 1370 | |
8cc44579 | 1371 | return netlbl_unlabel_getattr(skb, family, secattr); |
d15c345f PM |
1372 | } |
1373 | ||
1374 | /** | |
1375 | * netlbl_skbuff_err - Handle a LSM error on a sk_buff | |
1376 | * @skb: the packet | |
a04e71f6 | 1377 | * @family: the family |
d15c345f | 1378 | * @error: the error code |
dfaebe98 | 1379 | * @gateway: true if host is acting as a gateway, false otherwise |
d15c345f PM |
1380 | * |
1381 | * Description: | |
1382 | * Deal with a LSM problem when handling the packet in @skb, typically this is | |
1383 | * a permission denied problem (-EACCES). The correct action is determined | |
1384 | * according to the packet's labeling protocol. | |
1385 | * | |
1386 | */ | |
a04e71f6 | 1387 | void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway) |
d15c345f | 1388 | { |
a04e71f6 HD |
1389 | switch (family) { |
1390 | case AF_INET: | |
1391 | if (cipso_v4_optptr(skb)) | |
1392 | cipso_v4_error(skb, error, gateway); | |
1393 | break; | |
1394 | } | |
d15c345f PM |
1395 | } |
1396 | ||
1397 | /** | |
1398 | * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches | |
1399 | * | |
1400 | * Description: | |
1401 | * For all of the NetLabel protocols that support some form of label mapping | |
1402 | * cache, invalidate the cache. Returns zero on success, negative values on | |
1403 | * error. | |
1404 | * | |
1405 | */ | |
1406 | void netlbl_cache_invalidate(void) | |
1407 | { | |
1408 | cipso_v4_cache_invalidate(); | |
4fee5242 HD |
1409 | #if IS_ENABLED(CONFIG_IPV6) |
1410 | calipso_cache_invalidate(); | |
1411 | #endif /* IPv6 */ | |
d15c345f PM |
1412 | } |
1413 | ||
1414 | /** | |
1415 | * netlbl_cache_add - Add an entry to a NetLabel protocol cache | |
1416 | * @skb: the packet | |
4fee5242 | 1417 | * @family: the family |
d15c345f PM |
1418 | * @secattr: the packet's security attributes |
1419 | * | |
1420 | * Description: | |
1421 | * Add the LSM security attributes for the given packet to the underlying | |
1422 | * NetLabel protocol's label mapping cache. Returns zero on success, negative | |
1423 | * values on error. | |
1424 | * | |
1425 | */ | |
4fee5242 | 1426 | int netlbl_cache_add(const struct sk_buff *skb, u16 family, |
d15c345f PM |
1427 | const struct netlbl_lsm_secattr *secattr) |
1428 | { | |
04f81f01 PM |
1429 | unsigned char *ptr; |
1430 | ||
701a90ba | 1431 | if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0) |
d15c345f PM |
1432 | return -ENOMSG; |
1433 | ||
4fee5242 HD |
1434 | switch (family) { |
1435 | case AF_INET: | |
1436 | ptr = cipso_v4_optptr(skb); | |
1437 | if (ptr) | |
1438 | return cipso_v4_cache_add(ptr, secattr); | |
1439 | break; | |
1440 | #if IS_ENABLED(CONFIG_IPV6) | |
1441 | case AF_INET6: | |
1442 | ptr = calipso_optptr(skb); | |
1443 | if (ptr) | |
1444 | return calipso_cache_add(ptr, secattr); | |
1445 | break; | |
1446 | #endif /* IPv6 */ | |
1447 | } | |
d15c345f PM |
1448 | return -ENOMSG; |
1449 | } | |
1450 | ||
6c2e8ac0 PM |
1451 | /* |
1452 | * Protocol Engine Functions | |
1453 | */ | |
1454 | ||
1455 | /** | |
1456 | * netlbl_audit_start - Start an audit message | |
1457 | * @type: audit message type | |
1458 | * @audit_info: NetLabel audit information | |
1459 | * | |
1460 | * Description: | |
1461 | * Start an audit message using the type specified in @type and fill the audit | |
1462 | * message with some fields common to all NetLabel audit messages. This | |
1463 | * function should only be used by protocol engines, not LSMs. Returns a | |
1464 | * pointer to the audit buffer on success, NULL on failure. | |
1465 | * | |
1466 | */ | |
1467 | struct audit_buffer *netlbl_audit_start(int type, | |
1468 | struct netlbl_audit *audit_info) | |
1469 | { | |
1470 | return netlbl_audit_start_common(type, audit_info); | |
1471 | } | |
cb72d382 | 1472 | EXPORT_SYMBOL(netlbl_audit_start); |
6c2e8ac0 | 1473 | |
d15c345f PM |
1474 | /* |
1475 | * Setup Functions | |
1476 | */ | |
1477 | ||
1478 | /** | |
1479 | * netlbl_init - Initialize NetLabel | |
1480 | * | |
1481 | * Description: | |
1482 | * Perform the required NetLabel initialization before first use. | |
1483 | * | |
1484 | */ | |
1485 | static int __init netlbl_init(void) | |
1486 | { | |
1487 | int ret_val; | |
1488 | ||
1489 | printk(KERN_INFO "NetLabel: Initializing\n"); | |
1490 | printk(KERN_INFO "NetLabel: domain hash size = %u\n", | |
1491 | (1 << NETLBL_DOMHSH_BITSIZE)); | |
bcd5e1a4 | 1492 | printk(KERN_INFO "NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO\n"); |
d15c345f PM |
1493 | |
1494 | ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE); | |
1495 | if (ret_val != 0) | |
1496 | goto init_failure; | |
1497 | ||
8cc44579 PM |
1498 | ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE); |
1499 | if (ret_val != 0) | |
1500 | goto init_failure; | |
1501 | ||
d15c345f PM |
1502 | ret_val = netlbl_netlink_init(); |
1503 | if (ret_val != 0) | |
1504 | goto init_failure; | |
1505 | ||
1506 | ret_val = netlbl_unlabel_defconf(); | |
1507 | if (ret_val != 0) | |
1508 | goto init_failure; | |
1509 | printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n"); | |
1510 | ||
1511 | return 0; | |
1512 | ||
1513 | init_failure: | |
1514 | panic("NetLabel: failed to initialize properly (%d)\n", ret_val); | |
1515 | } | |
1516 | ||
1517 | subsys_initcall(netlbl_init); |