blob: 15fe2120b31096983071f36ff2e066a8fb7d4443 [file] [log] [blame]
Paul Moored15c3452006-08-03 16:48:37 -07001/*
2 * NetLabel Kernel API
3 *
4 * This file defines the kernel API for the NetLabel system. The NetLabel
5 * system manages static and dynamic label mappings for network protocols such
6 * as CIPSO and RIPSO.
7 *
Paul Moore82c21bf2011-08-01 11:10:33 +00008 * Author: Paul Moore <paul@paul-moore.com>
Paul Moored15c3452006-08-03 16:48:37 -07009 *
10 */
11
12/*
Paul Moore014ab192008-10-10 10:16:33 -040013 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
Paul Moored15c3452006-08-03 16:48:37 -070014 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
23 * the GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
Jeff Kirsherd484ff12013-12-06 09:13:41 -080026 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Paul Moored15c3452006-08-03 16:48:37 -070027 *
28 */
29
30#include <linux/init.h>
31#include <linux/types.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090032#include <linux/slab.h>
Paul Mooreeda61d32008-02-04 22:29:47 -080033#include <linux/audit.h>
Paul Moore6c2e8ac2008-12-31 12:54:11 -050034#include <linux/in.h>
35#include <linux/in6.h>
Paul Moored15c3452006-08-03 16:48:37 -070036#include <net/ip.h>
Paul Moore6c2e8ac2008-12-31 12:54:11 -050037#include <net/ipv6.h>
Paul Moored15c3452006-08-03 16:48:37 -070038#include <net/netlabel.h>
39#include <net/cipso_ipv4.h>
Huw Daviesceba1832016-06-27 15:02:51 -040040#include <net/calipso.h>
Paul Moored15c3452006-08-03 16:48:37 -070041#include <asm/bug.h>
Arun Sharma600634972011-07-26 16:09:06 -070042#include <linux/atomic.h>
Paul Moored15c3452006-08-03 16:48:37 -070043
44#include "netlabel_domainhash.h"
45#include "netlabel_unlabeled.h"
Paul Mooreeda61d32008-02-04 22:29:47 -080046#include "netlabel_cipso_v4.h"
Huw Daviesceba1832016-06-27 15:02:51 -040047#include "netlabel_calipso.h"
Paul Moored15c3452006-08-03 16:48:37 -070048#include "netlabel_user.h"
Paul Moore23bcdc12007-07-18 12:28:45 -040049#include "netlabel_mgmt.h"
Paul Moore6c2e8ac2008-12-31 12:54:11 -050050#include "netlabel_addrlist.h"
Paul Moored15c3452006-08-03 16:48:37 -070051
52/*
Paul Mooreeda61d32008-02-04 22:29:47 -080053 * Configuration Functions
54 */
55
56/**
57 * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
58 * @domain: the domain mapping to remove
Paul Moore6c2e8ac2008-12-31 12:54:11 -050059 * @family: address family
60 * @addr: IP address
61 * @mask: IP address mask
Paul Mooreeda61d32008-02-04 22:29:47 -080062 * @audit_info: NetLabel audit information
63 *
64 * Description:
65 * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the
66 * default domain mapping to be removed. Returns zero on success, negative
67 * values on failure.
68 *
69 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -050070int netlbl_cfg_map_del(const char *domain,
71 u16 family,
72 const void *addr,
73 const void *mask,
74 struct netlbl_audit *audit_info)
Paul Mooreeda61d32008-02-04 22:29:47 -080075{
Paul Moore6c2e8ac2008-12-31 12:54:11 -050076 if (addr == NULL && mask == NULL) {
Huw Davies8f18e672016-06-27 15:02:46 -040077 return netlbl_domhsh_remove(domain, family, audit_info);
Paul Moore6c2e8ac2008-12-31 12:54:11 -050078 } else if (addr != NULL && mask != NULL) {
79 switch (family) {
80 case AF_INET:
81 return netlbl_domhsh_remove_af4(domain, addr, mask,
82 audit_info);
Huw Davies3f093542016-06-27 15:06:18 -040083#if IS_ENABLED(CONFIG_IPV6)
84 case AF_INET6:
85 return netlbl_domhsh_remove_af6(domain, addr, mask,
86 audit_info);
87#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -050088 default:
89 return -EPFNOSUPPORT;
90 }
91 } else
92 return -EINVAL;
Paul Mooreeda61d32008-02-04 22:29:47 -080093}
94
95/**
Paul Moore6c2e8ac2008-12-31 12:54:11 -050096 * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
Paul Mooreeda61d32008-02-04 22:29:47 -080097 * @domain: the domain mapping to add
Paul Moore6c2e8ac2008-12-31 12:54:11 -050098 * @family: address family
99 * @addr: IP address
100 * @mask: IP address mask
Paul Mooreeda61d32008-02-04 22:29:47 -0800101 * @audit_info: NetLabel audit information
102 *
103 * Description:
104 * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL
105 * causes a new default domain mapping to be added. Returns zero on success,
106 * negative values on failure.
107 *
108 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500109int netlbl_cfg_unlbl_map_add(const char *domain,
110 u16 family,
111 const void *addr,
112 const void *mask,
Paul Mooreeda61d32008-02-04 22:29:47 -0800113 struct netlbl_audit *audit_info)
114{
115 int ret_val = -ENOMEM;
116 struct netlbl_dom_map *entry;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500117 struct netlbl_domaddr_map *addrmap = NULL;
118 struct netlbl_domaddr4_map *map4 = NULL;
119 struct netlbl_domaddr6_map *map6 = NULL;
Paul Mooreeda61d32008-02-04 22:29:47 -0800120
121 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
122 if (entry == NULL)
Paul Moore948a7242008-10-10 10:16:30 -0400123 return -ENOMEM;
Paul Mooreeda61d32008-02-04 22:29:47 -0800124 if (domain != NULL) {
125 entry->domain = kstrdup(domain, GFP_ATOMIC);
126 if (entry->domain == NULL)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500127 goto cfg_unlbl_map_add_failure;
Paul Mooreeda61d32008-02-04 22:29:47 -0800128 }
Huw Davies8f18e672016-06-27 15:02:46 -0400129 entry->family = family;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500130
131 if (addr == NULL && mask == NULL)
Paul Moore6a8b7f02013-08-02 14:45:08 -0400132 entry->def.type = NETLBL_NLTYPE_UNLABELED;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500133 else if (addr != NULL && mask != NULL) {
134 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
135 if (addrmap == NULL)
136 goto cfg_unlbl_map_add_failure;
137 INIT_LIST_HEAD(&addrmap->list4);
138 INIT_LIST_HEAD(&addrmap->list6);
139
140 switch (family) {
Paul Moore1281bc22011-11-29 10:10:54 +0000141 case AF_INET: {
142 const struct in_addr *addr4 = addr;
143 const struct in_addr *mask4 = mask;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500144 map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
145 if (map4 == NULL)
146 goto cfg_unlbl_map_add_failure;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400147 map4->def.type = NETLBL_NLTYPE_UNLABELED;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500148 map4->list.addr = addr4->s_addr & mask4->s_addr;
149 map4->list.mask = mask4->s_addr;
150 map4->list.valid = 1;
151 ret_val = netlbl_af4list_add(&map4->list,
152 &addrmap->list4);
153 if (ret_val != 0)
154 goto cfg_unlbl_map_add_failure;
155 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000156 }
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000157#if IS_ENABLED(CONFIG_IPV6)
Paul Moore1281bc22011-11-29 10:10:54 +0000158 case AF_INET6: {
159 const struct in6_addr *addr6 = addr;
160 const struct in6_addr *mask6 = mask;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500161 map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
Julia Lawallca7daea2009-07-30 04:38:19 +0000162 if (map6 == NULL)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500163 goto cfg_unlbl_map_add_failure;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400164 map6->def.type = NETLBL_NLTYPE_UNLABELED;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000165 map6->list.addr = *addr6;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500166 map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
167 map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
168 map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
169 map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000170 map6->list.mask = *mask6;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500171 map6->list.valid = 1;
Dan Carpenter42ca0202011-11-23 21:18:20 +0000172 ret_val = netlbl_af6list_add(&map6->list,
173 &addrmap->list6);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500174 if (ret_val != 0)
175 goto cfg_unlbl_map_add_failure;
176 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000177 }
178#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500179 default:
180 goto cfg_unlbl_map_add_failure;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500181 }
182
Paul Moore6a8b7f02013-08-02 14:45:08 -0400183 entry->def.addrsel = addrmap;
184 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500185 } else {
186 ret_val = -EINVAL;
187 goto cfg_unlbl_map_add_failure;
188 }
Paul Mooreeda61d32008-02-04 22:29:47 -0800189
190 ret_val = netlbl_domhsh_add(entry, audit_info);
191 if (ret_val != 0)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500192 goto cfg_unlbl_map_add_failure;
Paul Mooreeda61d32008-02-04 22:29:47 -0800193
194 return 0;
195
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500196cfg_unlbl_map_add_failure:
Julia Lawall47943232009-07-27 06:15:43 +0000197 kfree(entry->domain);
Paul Mooreeda61d32008-02-04 22:29:47 -0800198 kfree(entry);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500199 kfree(addrmap);
200 kfree(map4);
201 kfree(map6);
Paul Mooreeda61d32008-02-04 22:29:47 -0800202 return ret_val;
203}
204
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500205
Paul Mooreeda61d32008-02-04 22:29:47 -0800206/**
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500207 * netlbl_cfg_unlbl_static_add - Adds a new static label
208 * @net: network namespace
209 * @dev_name: interface name
210 * @addr: IP address in network byte order (struct in[6]_addr)
211 * @mask: address mask in network byte order (struct in[6]_addr)
212 * @family: address family
213 * @secid: LSM secid value for the entry
Paul Mooreeda61d32008-02-04 22:29:47 -0800214 * @audit_info: NetLabel audit information
215 *
216 * Description:
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500217 * Adds a new NetLabel static label to be used when protocol provided labels
218 * are not present on incoming traffic. If @dev_name is NULL then the default
219 * interface will be used. Returns zero on success, negative values on failure.
Paul Mooreeda61d32008-02-04 22:29:47 -0800220 *
221 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500222int netlbl_cfg_unlbl_static_add(struct net *net,
223 const char *dev_name,
224 const void *addr,
225 const void *mask,
226 u16 family,
227 u32 secid,
228 struct netlbl_audit *audit_info)
229{
230 u32 addr_len;
231
232 switch (family) {
233 case AF_INET:
234 addr_len = sizeof(struct in_addr);
235 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000236#if IS_ENABLED(CONFIG_IPV6)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500237 case AF_INET6:
238 addr_len = sizeof(struct in6_addr);
239 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000240#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500241 default:
242 return -EPFNOSUPPORT;
243 }
244
245 return netlbl_unlhsh_add(net,
246 dev_name, addr, mask, addr_len,
247 secid, audit_info);
248}
249
250/**
251 * netlbl_cfg_unlbl_static_del - Removes an existing static label
252 * @net: network namespace
253 * @dev_name: interface name
254 * @addr: IP address in network byte order (struct in[6]_addr)
255 * @mask: address mask in network byte order (struct in[6]_addr)
256 * @family: address family
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500257 * @audit_info: NetLabel audit information
258 *
259 * Description:
260 * Removes an existing NetLabel static label used when protocol provided labels
261 * are not present on incoming traffic. If @dev_name is NULL then the default
262 * interface will be used. Returns zero on success, negative values on failure.
263 *
264 */
265int netlbl_cfg_unlbl_static_del(struct net *net,
266 const char *dev_name,
267 const void *addr,
268 const void *mask,
269 u16 family,
270 struct netlbl_audit *audit_info)
271{
272 u32 addr_len;
273
274 switch (family) {
275 case AF_INET:
276 addr_len = sizeof(struct in_addr);
277 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000278#if IS_ENABLED(CONFIG_IPV6)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500279 case AF_INET6:
280 addr_len = sizeof(struct in6_addr);
281 break;
Paul Moore1281bc22011-11-29 10:10:54 +0000282#endif /* IPv6 */
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500283 default:
284 return -EPFNOSUPPORT;
285 }
286
287 return netlbl_unlhsh_remove(net,
288 dev_name, addr, mask, addr_len,
289 audit_info);
290}
291
292/**
293 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
294 * @doi_def: CIPSO DOI definition
295 * @audit_info: NetLabel audit information
296 *
297 * Description:
298 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
299 * success and negative values on failure.
300 *
301 */
302int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
303 struct netlbl_audit *audit_info)
304{
305 return cipso_v4_doi_add(doi_def, audit_info);
306}
307
308/**
309 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
310 * @doi: CIPSO DOI
311 * @audit_info: NetLabel audit information
312 *
313 * Description:
314 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
315 * success and negative values on failure.
316 *
317 */
318void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
319{
320 cipso_v4_doi_remove(doi, audit_info);
321}
322
323/**
324 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
325 * @doi: the CIPSO DOI
326 * @domain: the domain mapping to add
327 * @addr: IP address
328 * @mask: IP address mask
329 * @audit_info: NetLabel audit information
330 *
331 * Description:
332 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
333 * subsystem. A @domain value of NULL adds a new default domain mapping.
334 * Returns zero on success, negative values on failure.
335 *
336 */
337int netlbl_cfg_cipsov4_map_add(u32 doi,
Paul Mooreeda61d32008-02-04 22:29:47 -0800338 const char *domain,
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500339 const struct in_addr *addr,
340 const struct in_addr *mask,
Paul Mooreeda61d32008-02-04 22:29:47 -0800341 struct netlbl_audit *audit_info)
342{
343 int ret_val = -ENOMEM;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500344 struct cipso_v4_doi *doi_def;
Paul Mooreeda61d32008-02-04 22:29:47 -0800345 struct netlbl_dom_map *entry;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500346 struct netlbl_domaddr_map *addrmap = NULL;
347 struct netlbl_domaddr4_map *addrinfo = NULL;
Paul Mooreeda61d32008-02-04 22:29:47 -0800348
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500349 doi_def = cipso_v4_doi_getdef(doi);
350 if (doi_def == NULL)
351 return -ENOENT;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400352
Paul Mooreeda61d32008-02-04 22:29:47 -0800353 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
354 if (entry == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000355 goto out_entry;
Huw Davies8f18e672016-06-27 15:02:46 -0400356 entry->family = AF_INET;
Paul Mooreeda61d32008-02-04 22:29:47 -0800357 if (domain != NULL) {
358 entry->domain = kstrdup(domain, GFP_ATOMIC);
359 if (entry->domain == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000360 goto out_domain;
Paul Mooreeda61d32008-02-04 22:29:47 -0800361 }
Paul Mooreeda61d32008-02-04 22:29:47 -0800362
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500363 if (addr == NULL && mask == NULL) {
Paul Moore6a8b7f02013-08-02 14:45:08 -0400364 entry->def.cipso = doi_def;
365 entry->def.type = NETLBL_NLTYPE_CIPSOV4;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500366 } else if (addr != NULL && mask != NULL) {
367 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
368 if (addrmap == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000369 goto out_addrmap;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500370 INIT_LIST_HEAD(&addrmap->list4);
371 INIT_LIST_HEAD(&addrmap->list6);
372
373 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
374 if (addrinfo == NULL)
Julia Lawall94a80d62011-08-11 00:06:04 +0000375 goto out_addrinfo;
Paul Moore6a8b7f02013-08-02 14:45:08 -0400376 addrinfo->def.cipso = doi_def;
377 addrinfo->def.type = NETLBL_NLTYPE_CIPSOV4;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500378 addrinfo->list.addr = addr->s_addr & mask->s_addr;
379 addrinfo->list.mask = mask->s_addr;
380 addrinfo->list.valid = 1;
381 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
382 if (ret_val != 0)
383 goto cfg_cipsov4_map_add_failure;
384
Paul Moore6a8b7f02013-08-02 14:45:08 -0400385 entry->def.addrsel = addrmap;
386 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500387 } else {
388 ret_val = -EINVAL;
Julia Lawall94a80d62011-08-11 00:06:04 +0000389 goto out_addrmap;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400390 }
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500391
Paul Mooreeda61d32008-02-04 22:29:47 -0800392 ret_val = netlbl_domhsh_add(entry, audit_info);
393 if (ret_val != 0)
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500394 goto cfg_cipsov4_map_add_failure;
Paul Mooreeda61d32008-02-04 22:29:47 -0800395
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500396 return 0;
Paul Mooreb1edeb12008-10-10 10:16:31 -0400397
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500398cfg_cipsov4_map_add_failure:
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500399 kfree(addrinfo);
Julia Lawall94a80d62011-08-11 00:06:04 +0000400out_addrinfo:
401 kfree(addrmap);
402out_addrmap:
403 kfree(entry->domain);
404out_domain:
405 kfree(entry);
406out_entry:
407 cipso_v4_doi_putdef(doi_def);
Paul Moore6c2e8ac2008-12-31 12:54:11 -0500408 return ret_val;
Paul Mooreeda61d32008-02-04 22:29:47 -0800409}
410
Huw Davies3f093542016-06-27 15:06:18 -0400411/**
412 * netlbl_cfg_calipso_add - Add a new CALIPSO DOI definition
413 * @doi_def: CALIPSO DOI definition
414 * @audit_info: NetLabel audit information
415 *
416 * Description:
417 * Add a new CALIPSO DOI definition as defined by @doi_def. Returns zero on
418 * success and negative values on failure.
419 *
420 */
421int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
422 struct netlbl_audit *audit_info)
423{
424#if IS_ENABLED(CONFIG_IPV6)
425 return calipso_doi_add(doi_def, audit_info);
426#else /* IPv6 */
427 return -ENOSYS;
428#endif /* IPv6 */
429}
430
431/**
432 * netlbl_cfg_calipso_del - Remove an existing CALIPSO DOI definition
433 * @doi: CALIPSO DOI
434 * @audit_info: NetLabel audit information
435 *
436 * Description:
437 * Remove an existing CALIPSO DOI definition matching @doi. Returns zero on
438 * success and negative values on failure.
439 *
440 */
441void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info)
442{
443#if IS_ENABLED(CONFIG_IPV6)
444 calipso_doi_remove(doi, audit_info);
445#endif /* IPv6 */
446}
447
448/**
449 * netlbl_cfg_calipso_map_add - Add a new CALIPSO DOI mapping
450 * @doi: the CALIPSO DOI
451 * @domain: the domain mapping to add
452 * @addr: IP address
453 * @mask: IP address mask
454 * @audit_info: NetLabel audit information
455 *
456 * Description:
457 * Add a new NetLabel/LSM domain mapping for the given CALIPSO DOI to the
458 * NetLabel subsystem. A @domain value of NULL adds a new default domain
459 * mapping. Returns zero on success, negative values on failure.
460 *
461 */
462int netlbl_cfg_calipso_map_add(u32 doi,
463 const char *domain,
464 const struct in6_addr *addr,
465 const struct in6_addr *mask,
466 struct netlbl_audit *audit_info)
467{
468#if IS_ENABLED(CONFIG_IPV6)
469 int ret_val = -ENOMEM;
470 struct calipso_doi *doi_def;
471 struct netlbl_dom_map *entry;
472 struct netlbl_domaddr_map *addrmap = NULL;
473 struct netlbl_domaddr6_map *addrinfo = NULL;
474
475 doi_def = calipso_doi_getdef(doi);
476 if (doi_def == NULL)
477 return -ENOENT;
478
479 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
480 if (entry == NULL)
481 goto out_entry;
482 entry->family = AF_INET6;
483 if (domain != NULL) {
484 entry->domain = kstrdup(domain, GFP_ATOMIC);
485 if (entry->domain == NULL)
486 goto out_domain;
487 }
488
489 if (addr == NULL && mask == NULL) {
490 entry->def.calipso = doi_def;
491 entry->def.type = NETLBL_NLTYPE_CALIPSO;
492 } else if (addr != NULL && mask != NULL) {
493 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
494 if (addrmap == NULL)
495 goto out_addrmap;
496 INIT_LIST_HEAD(&addrmap->list4);
497 INIT_LIST_HEAD(&addrmap->list6);
498
499 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
500 if (addrinfo == NULL)
501 goto out_addrinfo;
502 addrinfo->def.calipso = doi_def;
503 addrinfo->def.type = NETLBL_NLTYPE_CALIPSO;
504 addrinfo->list.addr = *addr;
505 addrinfo->list.addr.s6_addr32[0] &= mask->s6_addr32[0];
506 addrinfo->list.addr.s6_addr32[1] &= mask->s6_addr32[1];
507 addrinfo->list.addr.s6_addr32[2] &= mask->s6_addr32[2];
508 addrinfo->list.addr.s6_addr32[3] &= mask->s6_addr32[3];
509 addrinfo->list.mask = *mask;
510 addrinfo->list.valid = 1;
511 ret_val = netlbl_af6list_add(&addrinfo->list, &addrmap->list6);
512 if (ret_val != 0)
513 goto cfg_calipso_map_add_failure;
514
515 entry->def.addrsel = addrmap;
516 entry->def.type = NETLBL_NLTYPE_ADDRSELECT;
517 } else {
518 ret_val = -EINVAL;
519 goto out_addrmap;
520 }
521
522 ret_val = netlbl_domhsh_add(entry, audit_info);
523 if (ret_val != 0)
524 goto cfg_calipso_map_add_failure;
525
526 return 0;
527
528cfg_calipso_map_add_failure:
529 kfree(addrinfo);
530out_addrinfo:
531 kfree(addrmap);
532out_addrmap:
533 kfree(entry->domain);
534out_domain:
535 kfree(entry);
536out_entry:
537 calipso_doi_putdef(doi_def);
538 return ret_val;
539#else /* IPv6 */
540 return -ENOSYS;
541#endif /* IPv6 */
542}
543
Paul Mooreeda61d32008-02-04 22:29:47 -0800544/*
Paul Moore02752762006-11-29 13:18:18 -0500545 * Security Attribute Functions
546 */
547
Paul Moore4b8feff2014-08-01 11:17:17 -0400548#define _CM_F_NONE 0x00000000
549#define _CM_F_ALLOC 0x00000001
Paul Moored960a612014-08-01 11:17:29 -0400550#define _CM_F_WALK 0x00000002
Paul Moore4b8feff2014-08-01 11:17:17 -0400551
552/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400553 * _netlbl_catmap_getnode - Get a individual node from a catmap
Paul Moore4b8feff2014-08-01 11:17:17 -0400554 * @catmap: pointer to the category bitmap
555 * @offset: the requested offset
556 * @cm_flags: catmap flags, see _CM_F_*
557 * @gfp_flags: memory allocation flags
558 *
559 * Description:
Paul Moored960a612014-08-01 11:17:29 -0400560 * Iterate through the catmap looking for the node associated with @offset.
561 * If the _CM_F_ALLOC flag is set in @cm_flags and there is no associated node,
562 * one will be created and inserted into the catmap. If the _CM_F_WALK flag is
563 * set in @cm_flags and there is no associated node, the next highest node will
564 * be returned. Returns a pointer to the node on success, NULL on failure.
Paul Moore4b8feff2014-08-01 11:17:17 -0400565 *
566 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400567static struct netlbl_lsm_catmap *_netlbl_catmap_getnode(
568 struct netlbl_lsm_catmap **catmap,
569 u32 offset,
570 unsigned int cm_flags,
571 gfp_t gfp_flags)
Paul Moore4b8feff2014-08-01 11:17:17 -0400572{
Paul Moore4fbe63d2014-08-01 11:17:37 -0400573 struct netlbl_lsm_catmap *iter = *catmap;
574 struct netlbl_lsm_catmap *prev = NULL;
Paul Moore4b8feff2014-08-01 11:17:17 -0400575
Paul Moored960a612014-08-01 11:17:29 -0400576 if (iter == NULL)
Paul Moore4fbe63d2014-08-01 11:17:37 -0400577 goto catmap_getnode_alloc;
Paul Moored960a612014-08-01 11:17:29 -0400578 if (offset < iter->startbit)
Paul Moore4fbe63d2014-08-01 11:17:37 -0400579 goto catmap_getnode_walk;
Paul Moore4b8feff2014-08-01 11:17:17 -0400580 while (iter && offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
581 prev = iter;
582 iter = iter->next;
583 }
584 if (iter == NULL || offset < iter->startbit)
Paul Moore4fbe63d2014-08-01 11:17:37 -0400585 goto catmap_getnode_walk;
Paul Moore4b8feff2014-08-01 11:17:17 -0400586
587 return iter;
588
Paul Moore4fbe63d2014-08-01 11:17:37 -0400589catmap_getnode_walk:
Paul Moored960a612014-08-01 11:17:29 -0400590 if (cm_flags & _CM_F_WALK)
591 return iter;
Paul Moore4fbe63d2014-08-01 11:17:37 -0400592catmap_getnode_alloc:
Paul Moore4b8feff2014-08-01 11:17:17 -0400593 if (!(cm_flags & _CM_F_ALLOC))
594 return NULL;
595
Paul Moore4fbe63d2014-08-01 11:17:37 -0400596 iter = netlbl_catmap_alloc(gfp_flags);
Paul Moore4b8feff2014-08-01 11:17:17 -0400597 if (iter == NULL)
598 return NULL;
599 iter->startbit = offset & ~(NETLBL_CATMAP_SIZE - 1);
600
601 if (prev == NULL) {
602 iter->next = *catmap;
603 *catmap = iter;
604 } else {
605 iter->next = prev->next;
606 prev->next = iter;
607 }
608
609 return iter;
610}
611
Paul Moore02752762006-11-29 13:18:18 -0500612/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400613 * netlbl_catmap_walk - Walk a LSM secattr catmap looking for a bit
Paul Moore02752762006-11-29 13:18:18 -0500614 * @catmap: the category bitmap
615 * @offset: the offset to start searching at, in bits
616 *
617 * Description:
618 * This function walks a LSM secattr category bitmap starting at @offset and
619 * returns the spot of the first set bit or -ENOENT if no bits are set.
620 *
621 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400622int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset)
Paul Moore02752762006-11-29 13:18:18 -0500623{
Paul Moore4fbe63d2014-08-01 11:17:37 -0400624 struct netlbl_lsm_catmap *iter = catmap;
Paul Moored960a612014-08-01 11:17:29 -0400625 u32 idx;
626 u32 bit;
Paul Moore02752762006-11-29 13:18:18 -0500627 NETLBL_CATMAP_MAPTYPE bitmap;
628
Paul Moore4fbe63d2014-08-01 11:17:37 -0400629 iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0);
Paul Moored960a612014-08-01 11:17:29 -0400630 if (iter == NULL)
631 return -ENOENT;
Paul Moore02752762006-11-29 13:18:18 -0500632 if (offset > iter->startbit) {
Paul Moored960a612014-08-01 11:17:29 -0400633 offset -= iter->startbit;
634 idx = offset / NETLBL_CATMAP_MAPSIZE;
635 bit = offset % NETLBL_CATMAP_MAPSIZE;
Paul Moore02752762006-11-29 13:18:18 -0500636 } else {
Paul Moored960a612014-08-01 11:17:29 -0400637 idx = 0;
638 bit = 0;
Paul Moore02752762006-11-29 13:18:18 -0500639 }
Paul Moored960a612014-08-01 11:17:29 -0400640 bitmap = iter->bitmap[idx] >> bit;
Paul Moore02752762006-11-29 13:18:18 -0500641
642 for (;;) {
643 if (bitmap != 0) {
644 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
645 bitmap >>= 1;
Paul Moored960a612014-08-01 11:17:29 -0400646 bit++;
Paul Moore02752762006-11-29 13:18:18 -0500647 }
648 return iter->startbit +
Paul Moored960a612014-08-01 11:17:29 -0400649 (NETLBL_CATMAP_MAPSIZE * idx) + bit;
Paul Moore02752762006-11-29 13:18:18 -0500650 }
Paul Moored960a612014-08-01 11:17:29 -0400651 if (++idx >= NETLBL_CATMAP_MAPCNT) {
Paul Moore02752762006-11-29 13:18:18 -0500652 if (iter->next != NULL) {
653 iter = iter->next;
Paul Moored960a612014-08-01 11:17:29 -0400654 idx = 0;
Paul Moore02752762006-11-29 13:18:18 -0500655 } else
656 return -ENOENT;
657 }
Paul Moored960a612014-08-01 11:17:29 -0400658 bitmap = iter->bitmap[idx];
659 bit = 0;
Paul Moore02752762006-11-29 13:18:18 -0500660 }
661
662 return -ENOENT;
663}
Huw Daviesceba1832016-06-27 15:02:51 -0400664EXPORT_SYMBOL(netlbl_catmap_walk);
Paul Moore02752762006-11-29 13:18:18 -0500665
666/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400667 * netlbl_catmap_walkrng - Find the end of a string of set bits
Paul Moore02752762006-11-29 13:18:18 -0500668 * @catmap: the category bitmap
669 * @offset: the offset to start searching at, in bits
670 *
671 * Description:
672 * This function walks a LSM secattr category bitmap starting at @offset and
673 * returns the spot of the first cleared bit or -ENOENT if the offset is past
674 * the end of the bitmap.
675 *
676 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400677int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset)
Paul Moore02752762006-11-29 13:18:18 -0500678{
Paul Moore4fbe63d2014-08-01 11:17:37 -0400679 struct netlbl_lsm_catmap *iter;
680 struct netlbl_lsm_catmap *prev = NULL;
Paul Moored960a612014-08-01 11:17:29 -0400681 u32 idx;
682 u32 bit;
Paul Moore02752762006-11-29 13:18:18 -0500683 NETLBL_CATMAP_MAPTYPE bitmask;
684 NETLBL_CATMAP_MAPTYPE bitmap;
685
Paul Moore4fbe63d2014-08-01 11:17:37 -0400686 iter = _netlbl_catmap_getnode(&catmap, offset, _CM_F_WALK, 0);
Paul Moored960a612014-08-01 11:17:29 -0400687 if (iter == NULL)
688 return -ENOENT;
Paul Moore02752762006-11-29 13:18:18 -0500689 if (offset > iter->startbit) {
Paul Moored960a612014-08-01 11:17:29 -0400690 offset -= iter->startbit;
691 idx = offset / NETLBL_CATMAP_MAPSIZE;
692 bit = offset % NETLBL_CATMAP_MAPSIZE;
Paul Moore02752762006-11-29 13:18:18 -0500693 } else {
Paul Moored960a612014-08-01 11:17:29 -0400694 idx = 0;
695 bit = 0;
Paul Moore02752762006-11-29 13:18:18 -0500696 }
Paul Moored960a612014-08-01 11:17:29 -0400697 bitmask = NETLBL_CATMAP_BIT << bit;
Paul Moore02752762006-11-29 13:18:18 -0500698
699 for (;;) {
Paul Moored960a612014-08-01 11:17:29 -0400700 bitmap = iter->bitmap[idx];
Paul Moore02752762006-11-29 13:18:18 -0500701 while (bitmask != 0 && (bitmap & bitmask) != 0) {
702 bitmask <<= 1;
Paul Moored960a612014-08-01 11:17:29 -0400703 bit++;
Paul Moore02752762006-11-29 13:18:18 -0500704 }
705
Paul Moored960a612014-08-01 11:17:29 -0400706 if (prev && idx == 0 && bit == 0)
707 return prev->startbit + NETLBL_CATMAP_SIZE - 1;
708 else if (bitmask != 0)
Paul Moore02752762006-11-29 13:18:18 -0500709 return iter->startbit +
Paul Moored960a612014-08-01 11:17:29 -0400710 (NETLBL_CATMAP_MAPSIZE * idx) + bit - 1;
711 else if (++idx >= NETLBL_CATMAP_MAPCNT) {
Paul Moore02752762006-11-29 13:18:18 -0500712 if (iter->next == NULL)
Paul Moored960a612014-08-01 11:17:29 -0400713 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
714 prev = iter;
Paul Moore02752762006-11-29 13:18:18 -0500715 iter = iter->next;
Paul Moored960a612014-08-01 11:17:29 -0400716 idx = 0;
Paul Moore02752762006-11-29 13:18:18 -0500717 }
718 bitmask = NETLBL_CATMAP_BIT;
Paul Moored960a612014-08-01 11:17:29 -0400719 bit = 0;
Paul Moore02752762006-11-29 13:18:18 -0500720 }
721
722 return -ENOENT;
723}
724
725/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400726 * netlbl_catmap_getlong - Export an unsigned long bitmap
Paul Moore4b8feff2014-08-01 11:17:17 -0400727 * @catmap: pointer to the category bitmap
728 * @offset: pointer to the requested offset
729 * @bitmap: the exported bitmap
730 *
731 * Description:
732 * Export a bitmap with an offset greater than or equal to @offset and return
733 * it in @bitmap. The @offset must be aligned to an unsigned long and will be
734 * updated on return if different from what was requested; if the catmap is
735 * empty at the requested offset and beyond, the @offset is set to (u32)-1.
736 * Returns zero on sucess, negative values on failure.
737 *
738 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400739int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
740 u32 *offset,
741 unsigned long *bitmap)
Paul Moore4b8feff2014-08-01 11:17:17 -0400742{
Paul Moore4fbe63d2014-08-01 11:17:37 -0400743 struct netlbl_lsm_catmap *iter;
Paul Moore4b8feff2014-08-01 11:17:17 -0400744 u32 off = *offset;
745 u32 idx;
746
747 /* only allow aligned offsets */
748 if ((off & (BITS_PER_LONG - 1)) != 0)
749 return -EINVAL;
750
Paolo Abeni0f5ae0f2020-05-12 14:43:14 +0200751 /* a null catmap is equivalent to an empty one */
752 if (!catmap) {
753 *offset = (u32)-1;
754 return 0;
755 }
756
Paul Moore4b8feff2014-08-01 11:17:17 -0400757 if (off < catmap->startbit) {
758 off = catmap->startbit;
759 *offset = off;
760 }
Paul Moore50b86292016-06-09 10:56:02 -0400761 iter = _netlbl_catmap_getnode(&catmap, off, _CM_F_WALK, 0);
Paul Moore4b8feff2014-08-01 11:17:17 -0400762 if (iter == NULL) {
763 *offset = (u32)-1;
764 return 0;
765 }
766
767 if (off < iter->startbit) {
Paul Moore50b86292016-06-09 10:56:02 -0400768 *offset = iter->startbit;
769 off = 0;
Paul Moore4b8feff2014-08-01 11:17:17 -0400770 } else
771 off -= iter->startbit;
Paul Moore4b8feff2014-08-01 11:17:17 -0400772 idx = off / NETLBL_CATMAP_MAPSIZE;
Paul Moore50b86292016-06-09 10:56:02 -0400773 *bitmap = iter->bitmap[idx] >> (off % NETLBL_CATMAP_MAPSIZE);
Paul Moore4b8feff2014-08-01 11:17:17 -0400774
775 return 0;
776}
777
778/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400779 * netlbl_catmap_setbit - Set a bit in a LSM secattr catmap
Paul Moore41c3bd22014-08-01 11:17:03 -0400780 * @catmap: pointer to the category bitmap
Paul Moore02752762006-11-29 13:18:18 -0500781 * @bit: the bit to set
782 * @flags: memory allocation flags
783 *
784 * Description:
785 * Set the bit specified by @bit in @catmap. Returns zero on success,
786 * negative values on failure.
787 *
788 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400789int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
790 u32 bit,
791 gfp_t flags)
Paul Moore02752762006-11-29 13:18:18 -0500792{
Paul Moore4fbe63d2014-08-01 11:17:37 -0400793 struct netlbl_lsm_catmap *iter;
Paul Moore4b8feff2014-08-01 11:17:17 -0400794 u32 idx;
Paul Moore02752762006-11-29 13:18:18 -0500795
Paul Moore4fbe63d2014-08-01 11:17:37 -0400796 iter = _netlbl_catmap_getnode(catmap, bit, _CM_F_ALLOC, flags);
Paul Moore4b8feff2014-08-01 11:17:17 -0400797 if (iter == NULL)
798 return -ENOMEM;
Paul Moore02752762006-11-29 13:18:18 -0500799
Paul Moore4b8feff2014-08-01 11:17:17 -0400800 bit -= iter->startbit;
801 idx = bit / NETLBL_CATMAP_MAPSIZE;
802 iter->bitmap[idx] |= NETLBL_CATMAP_BIT << (bit % NETLBL_CATMAP_MAPSIZE);
Paul Moore02752762006-11-29 13:18:18 -0500803
804 return 0;
805}
Huw Daviesceba1832016-06-27 15:02:51 -0400806EXPORT_SYMBOL(netlbl_catmap_setbit);
Paul Moore02752762006-11-29 13:18:18 -0500807
808/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400809 * netlbl_catmap_setrng - Set a range of bits in a LSM secattr catmap
Paul Moore41c3bd22014-08-01 11:17:03 -0400810 * @catmap: pointer to the category bitmap
Paul Moore02752762006-11-29 13:18:18 -0500811 * @start: the starting bit
812 * @end: the last bit in the string
813 * @flags: memory allocation flags
814 *
815 * Description:
816 * Set a range of bits, starting at @start and ending with @end. Returns zero
817 * on success, negative values on failure.
818 *
819 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400820int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
821 u32 start,
822 u32 end,
823 gfp_t flags)
Paul Moore02752762006-11-29 13:18:18 -0500824{
Paul Moore4b8feff2014-08-01 11:17:17 -0400825 int rc = 0;
826 u32 spot = start;
Paul Moore02752762006-11-29 13:18:18 -0500827
Paul Moore4b8feff2014-08-01 11:17:17 -0400828 while (rc == 0 && spot <= end) {
Janak Desai341e0cb2016-03-28 11:09:46 -0400829 if (((spot & (BITS_PER_LONG - 1)) == 0) &&
Paul Moore4b8feff2014-08-01 11:17:17 -0400830 ((end - spot) > BITS_PER_LONG)) {
Paul Moore4fbe63d2014-08-01 11:17:37 -0400831 rc = netlbl_catmap_setlong(catmap,
832 spot,
833 (unsigned long)-1,
834 flags);
Paul Moore4b8feff2014-08-01 11:17:17 -0400835 spot += BITS_PER_LONG;
836 } else
Paul Moore4fbe63d2014-08-01 11:17:37 -0400837 rc = netlbl_catmap_setbit(catmap, spot++, flags);
Paul Moore02752762006-11-29 13:18:18 -0500838 }
839
Paul Moore4b8feff2014-08-01 11:17:17 -0400840 return rc;
841}
842
843/**
Paul Moore4fbe63d2014-08-01 11:17:37 -0400844 * netlbl_catmap_setlong - Import an unsigned long bitmap
Paul Moore4b8feff2014-08-01 11:17:17 -0400845 * @catmap: pointer to the category bitmap
846 * @offset: offset to the start of the imported bitmap
847 * @bitmap: the bitmap to import
848 * @flags: memory allocation flags
849 *
850 * Description:
851 * Import the bitmap specified in @bitmap into @catmap, using the offset
852 * in @offset. The offset must be aligned to an unsigned long. Returns zero
853 * on success, negative values on failure.
854 *
855 */
Paul Moore4fbe63d2014-08-01 11:17:37 -0400856int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
857 u32 offset,
858 unsigned long bitmap,
859 gfp_t flags)
Paul Moore4b8feff2014-08-01 11:17:17 -0400860{
Paul Moore4fbe63d2014-08-01 11:17:37 -0400861 struct netlbl_lsm_catmap *iter;
Paul Moore4b8feff2014-08-01 11:17:17 -0400862 u32 idx;
863
864 /* only allow aligned offsets */
865 if ((offset & (BITS_PER_LONG - 1)) != 0)
866 return -EINVAL;
867
Paul Moore4fbe63d2014-08-01 11:17:37 -0400868 iter = _netlbl_catmap_getnode(catmap, offset, _CM_F_ALLOC, flags);
Paul Moore4b8feff2014-08-01 11:17:17 -0400869 if (iter == NULL)
870 return -ENOMEM;
871
872 offset -= iter->startbit;
873 idx = offset / NETLBL_CATMAP_MAPSIZE;
874 iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE);
875
876 return 0;
Paul Moore02752762006-11-29 13:18:18 -0500877}
878
Huw Davies3faa8f92016-06-27 15:02:51 -0400879/* Bitmap functions
880 */
881
882/**
883 * netlbl_bitmap_walk - Walk a bitmap looking for a bit
884 * @bitmap: the bitmap
885 * @bitmap_len: length in bits
886 * @offset: starting offset
887 * @state: if non-zero, look for a set (1) bit else look for a cleared (0) bit
888 *
889 * Description:
890 * Starting at @offset, walk the bitmap from left to right until either the
891 * desired bit is found or we reach the end. Return the bit offset, -1 if
892 * not found, or -2 if error.
893 */
894int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len,
895 u32 offset, u8 state)
896{
897 u32 bit_spot;
898 u32 byte_offset;
899 unsigned char bitmask;
900 unsigned char byte;
901
902 byte_offset = offset / 8;
903 byte = bitmap[byte_offset];
904 bit_spot = offset;
905 bitmask = 0x80 >> (offset % 8);
906
907 while (bit_spot < bitmap_len) {
908 if ((state && (byte & bitmask) == bitmask) ||
909 (state == 0 && (byte & bitmask) == 0))
910 return bit_spot;
911
Paul Moorefcfe7002019-02-25 19:06:06 -0500912 if (++bit_spot >= bitmap_len)
913 return -1;
Huw Davies3faa8f92016-06-27 15:02:51 -0400914 bitmask >>= 1;
915 if (bitmask == 0) {
916 byte = bitmap[++byte_offset];
917 bitmask = 0x80;
918 }
919 }
920
921 return -1;
922}
923EXPORT_SYMBOL(netlbl_bitmap_walk);
924
925/**
926 * netlbl_bitmap_setbit - Sets a single bit in a bitmap
927 * @bitmap: the bitmap
928 * @bit: the bit
929 * @state: if non-zero, set the bit (1) else clear the bit (0)
930 *
931 * Description:
932 * Set a single bit in the bitmask. Returns zero on success, negative values
933 * on error.
934 */
935void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state)
936{
937 u32 byte_spot;
938 u8 bitmask;
939
940 /* gcc always rounds to zero when doing integer division */
941 byte_spot = bit / 8;
942 bitmask = 0x80 >> (bit % 8);
943 if (state)
944 bitmap[byte_spot] |= bitmask;
945 else
946 bitmap[byte_spot] &= ~bitmask;
947}
948EXPORT_SYMBOL(netlbl_bitmap_setbit);
949
Paul Moore02752762006-11-29 13:18:18 -0500950/*
Paul Moored15c3452006-08-03 16:48:37 -0700951 * LSM Functions
952 */
953
954/**
Paul Moore23bcdc12007-07-18 12:28:45 -0400955 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
956 *
957 * Description:
958 * The LSM can use this function to determine if it should use NetLabel
959 * security attributes in it's enforcement mechanism. Currently, NetLabel is
960 * considered to be enabled when it's configuration contains a valid setup for
961 * at least one labeled protocol (i.e. NetLabel can understand incoming
962 * labeled packets of at least one type); otherwise NetLabel is considered to
963 * be disabled.
964 *
965 */
966int netlbl_enabled(void)
967{
968 /* At some point we probably want to expose this mechanism to the user
969 * as well so that admins can toggle NetLabel regardless of the
970 * configuration */
Paul Moorec783f1c2008-01-29 08:37:52 -0500971 return (atomic_read(&netlabel_mgmt_protocount) > 0);
Paul Moore23bcdc12007-07-18 12:28:45 -0400972}
973
974/**
Paul Moore389fb8002009-03-27 17:10:34 -0400975 * netlbl_sock_setattr - Label a socket using the correct protocol
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700976 * @sk: the socket to label
Paul Moore389fb8002009-03-27 17:10:34 -0400977 * @family: protocol family
Paul Moored15c3452006-08-03 16:48:37 -0700978 * @secattr: the security attributes
979 *
980 * Description:
981 * Attach the correct label to the given socket using the security attributes
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700982 * specified in @secattr. This function requires exclusive access to @sk,
983 * which means it either needs to be in the process of being created or locked.
Paul Moore63c41682008-10-10 10:16:32 -0400984 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
985 * network address selectors (can't blindly label the socket), and negative
986 * values on all other failures.
Paul Moored15c3452006-08-03 16:48:37 -0700987 *
988 */
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700989int netlbl_sock_setattr(struct sock *sk,
Paul Moore389fb8002009-03-27 17:10:34 -0400990 u16 family,
Paul Mooreba6ff9f2007-06-07 18:37:15 -0700991 const struct netlbl_lsm_secattr *secattr)
Paul Moored15c3452006-08-03 16:48:37 -0700992{
Paul Moore389fb8002009-03-27 17:10:34 -0400993 int ret_val;
Paul Moored15c3452006-08-03 16:48:37 -0700994 struct netlbl_dom_map *dom_entry;
995
996 rcu_read_lock();
Huw Davies8f18e672016-06-27 15:02:46 -0400997 dom_entry = netlbl_domhsh_getentry(secattr->domain, family);
Paul Moore389fb8002009-03-27 17:10:34 -0400998 if (dom_entry == NULL) {
999 ret_val = -ENOENT;
Paul Moored15c3452006-08-03 16:48:37 -07001000 goto socket_setattr_return;
Paul Moore389fb8002009-03-27 17:10:34 -04001001 }
1002 switch (family) {
1003 case AF_INET:
Paul Moore6a8b7f02013-08-02 14:45:08 -04001004 switch (dom_entry->def.type) {
Paul Moore389fb8002009-03-27 17:10:34 -04001005 case NETLBL_NLTYPE_ADDRSELECT:
1006 ret_val = -EDESTADDRREQ;
1007 break;
1008 case NETLBL_NLTYPE_CIPSOV4:
1009 ret_val = cipso_v4_sock_setattr(sk,
Paul Moore6a8b7f02013-08-02 14:45:08 -04001010 dom_entry->def.cipso,
1011 secattr);
Paul Moore389fb8002009-03-27 17:10:34 -04001012 break;
1013 case NETLBL_NLTYPE_UNLABELED:
1014 ret_val = 0;
1015 break;
1016 default:
1017 ret_val = -ENOENT;
1018 }
Paul Moore63c41682008-10-10 10:16:32 -04001019 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001020#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -04001021 case AF_INET6:
Huw Daviesceba1832016-06-27 15:02:51 -04001022 switch (dom_entry->def.type) {
1023 case NETLBL_NLTYPE_ADDRSELECT:
1024 ret_val = -EDESTADDRREQ;
1025 break;
1026 case NETLBL_NLTYPE_CALIPSO:
1027 ret_val = calipso_sock_setattr(sk,
1028 dom_entry->def.calipso,
1029 secattr);
1030 break;
1031 case NETLBL_NLTYPE_UNLABELED:
1032 ret_val = 0;
1033 break;
1034 default:
1035 ret_val = -ENOENT;
1036 }
Paul Moored15c3452006-08-03 16:48:37 -07001037 break;
Paul Moore389fb8002009-03-27 17:10:34 -04001038#endif /* IPv6 */
Paul Moored15c3452006-08-03 16:48:37 -07001039 default:
Paul Moore389fb8002009-03-27 17:10:34 -04001040 ret_val = -EPROTONOSUPPORT;
Paul Moored15c3452006-08-03 16:48:37 -07001041 }
1042
1043socket_setattr_return:
1044 rcu_read_unlock();
1045 return ret_val;
1046}
1047
1048/**
Paul Moore014ab192008-10-10 10:16:33 -04001049 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
1050 * @sk: the socket
1051 *
1052 * Description:
1053 * Remove all the NetLabel labeling from @sk. The caller is responsible for
1054 * ensuring that @sk is locked.
1055 *
1056 */
1057void netlbl_sock_delattr(struct sock *sk)
1058{
Paul Moore0e0e3672016-06-06 15:17:20 -04001059 switch (sk->sk_family) {
1060 case AF_INET:
1061 cipso_v4_sock_delattr(sk);
1062 break;
Huw Daviesceba1832016-06-27 15:02:51 -04001063#if IS_ENABLED(CONFIG_IPV6)
1064 case AF_INET6:
1065 calipso_sock_delattr(sk);
1066 break;
1067#endif /* IPv6 */
Paul Moore0e0e3672016-06-06 15:17:20 -04001068 }
Paul Moore014ab192008-10-10 10:16:33 -04001069}
1070
1071/**
Paul Moore14a72f52006-09-25 15:52:01 -07001072 * netlbl_sock_getattr - Determine the security attributes of a sock
1073 * @sk: the sock
1074 * @secattr: the security attributes
1075 *
1076 * Description:
Paul Moore8cc44572008-01-29 08:44:21 -05001077 * Examines the given sock to see if any NetLabel style labeling has been
Paul Moore14a72f52006-09-25 15:52:01 -07001078 * applied to the sock, if so it parses the socket label and returns the
1079 * security attributes in @secattr. Returns zero on success, negative values
1080 * on failure.
1081 *
1082 */
Paul Moore389fb8002009-03-27 17:10:34 -04001083int netlbl_sock_getattr(struct sock *sk,
1084 struct netlbl_lsm_secattr *secattr)
Paul Moore14a72f52006-09-25 15:52:01 -07001085{
Paul Moore389fb8002009-03-27 17:10:34 -04001086 int ret_val;
1087
1088 switch (sk->sk_family) {
1089 case AF_INET:
1090 ret_val = cipso_v4_sock_getattr(sk, secattr);
1091 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001092#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -04001093 case AF_INET6:
Huw Daviesceba1832016-06-27 15:02:51 -04001094 ret_val = calipso_sock_getattr(sk, secattr);
Paul Moore389fb8002009-03-27 17:10:34 -04001095 break;
1096#endif /* IPv6 */
1097 default:
1098 ret_val = -EPROTONOSUPPORT;
1099 }
1100
1101 return ret_val;
Paul Moore14a72f52006-09-25 15:52:01 -07001102}
1103
1104/**
Paul Moore014ab192008-10-10 10:16:33 -04001105 * netlbl_conn_setattr - Label a connected socket using the correct protocol
1106 * @sk: the socket to label
1107 * @addr: the destination address
1108 * @secattr: the security attributes
1109 *
1110 * Description:
1111 * Attach the correct label to the given connected socket using the security
1112 * attributes specified in @secattr. The caller is responsible for ensuring
1113 * that @sk is locked. Returns zero on success, negative values on failure.
1114 *
1115 */
1116int netlbl_conn_setattr(struct sock *sk,
1117 struct sockaddr *addr,
1118 const struct netlbl_lsm_secattr *secattr)
1119{
1120 int ret_val;
1121 struct sockaddr_in *addr4;
Huw Daviesceba1832016-06-27 15:02:51 -04001122#if IS_ENABLED(CONFIG_IPV6)
1123 struct sockaddr_in6 *addr6;
1124#endif
Paul Moore6a8b7f02013-08-02 14:45:08 -04001125 struct netlbl_dommap_def *entry;
Paul Moore014ab192008-10-10 10:16:33 -04001126
1127 rcu_read_lock();
1128 switch (addr->sa_family) {
1129 case AF_INET:
1130 addr4 = (struct sockaddr_in *)addr;
Paul Moore6a8b7f02013-08-02 14:45:08 -04001131 entry = netlbl_domhsh_getentry_af4(secattr->domain,
1132 addr4->sin_addr.s_addr);
1133 if (entry == NULL) {
Paul Moore014ab192008-10-10 10:16:33 -04001134 ret_val = -ENOENT;
1135 goto conn_setattr_return;
1136 }
Paul Moore6a8b7f02013-08-02 14:45:08 -04001137 switch (entry->type) {
Paul Moore014ab192008-10-10 10:16:33 -04001138 case NETLBL_NLTYPE_CIPSOV4:
1139 ret_val = cipso_v4_sock_setattr(sk,
Paul Moore6a8b7f02013-08-02 14:45:08 -04001140 entry->cipso, secattr);
Paul Moore014ab192008-10-10 10:16:33 -04001141 break;
1142 case NETLBL_NLTYPE_UNLABELED:
1143 /* just delete the protocols we support for right now
1144 * but we could remove other protocols if needed */
Huw Daviesceba1832016-06-27 15:02:51 -04001145 netlbl_sock_delattr(sk);
Paul Moore014ab192008-10-10 10:16:33 -04001146 ret_val = 0;
1147 break;
1148 default:
1149 ret_val = -ENOENT;
1150 }
1151 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001152#if IS_ENABLED(CONFIG_IPV6)
Paul Moore014ab192008-10-10 10:16:33 -04001153 case AF_INET6:
Huw Daviesceba1832016-06-27 15:02:51 -04001154 addr6 = (struct sockaddr_in6 *)addr;
1155 entry = netlbl_domhsh_getentry_af6(secattr->domain,
1156 &addr6->sin6_addr);
1157 if (entry == NULL) {
1158 ret_val = -ENOENT;
1159 goto conn_setattr_return;
1160 }
1161 switch (entry->type) {
1162 case NETLBL_NLTYPE_CALIPSO:
1163 ret_val = calipso_sock_setattr(sk,
1164 entry->calipso, secattr);
1165 break;
1166 case NETLBL_NLTYPE_UNLABELED:
1167 /* just delete the protocols we support for right now
1168 * but we could remove other protocols if needed */
1169 netlbl_sock_delattr(sk);
1170 ret_val = 0;
1171 break;
1172 default:
1173 ret_val = -ENOENT;
1174 }
Paul Moore014ab192008-10-10 10:16:33 -04001175 break;
1176#endif /* IPv6 */
1177 default:
Paul Moore389fb8002009-03-27 17:10:34 -04001178 ret_val = -EPROTONOSUPPORT;
Paul Moore014ab192008-10-10 10:16:33 -04001179 }
1180
1181conn_setattr_return:
1182 rcu_read_unlock();
1183 return ret_val;
1184}
1185
1186/**
Paul Moore389fb8002009-03-27 17:10:34 -04001187 * netlbl_req_setattr - Label a request socket using the correct protocol
1188 * @req: the request socket to label
1189 * @secattr: the security attributes
1190 *
1191 * Description:
1192 * Attach the correct label to the given socket using the security attributes
1193 * specified in @secattr. Returns zero on success, negative values on failure.
1194 *
1195 */
1196int netlbl_req_setattr(struct request_sock *req,
1197 const struct netlbl_lsm_secattr *secattr)
1198{
1199 int ret_val;
Paul Moore6a8b7f02013-08-02 14:45:08 -04001200 struct netlbl_dommap_def *entry;
Huw Daviese1adea92016-06-27 15:05:29 -04001201 struct inet_request_sock *ireq = inet_rsk(req);
Paul Moore389fb8002009-03-27 17:10:34 -04001202
1203 rcu_read_lock();
Paul Moore389fb8002009-03-27 17:10:34 -04001204 switch (req->rsk_ops->family) {
1205 case AF_INET:
Paul Moore6a8b7f02013-08-02 14:45:08 -04001206 entry = netlbl_domhsh_getentry_af4(secattr->domain,
Huw Daviese1adea92016-06-27 15:05:29 -04001207 ireq->ir_rmt_addr);
Paul Moore6a8b7f02013-08-02 14:45:08 -04001208 if (entry == NULL) {
1209 ret_val = -ENOENT;
1210 goto req_setattr_return;
Paul Moore389fb8002009-03-27 17:10:34 -04001211 }
Paul Moore6a8b7f02013-08-02 14:45:08 -04001212 switch (entry->type) {
Paul Moore389fb8002009-03-27 17:10:34 -04001213 case NETLBL_NLTYPE_CIPSOV4:
Paul Moore6a8b7f02013-08-02 14:45:08 -04001214 ret_val = cipso_v4_req_setattr(req,
1215 entry->cipso, secattr);
Paul Moore389fb8002009-03-27 17:10:34 -04001216 break;
1217 case NETLBL_NLTYPE_UNLABELED:
Huw Daviese1adea92016-06-27 15:05:29 -04001218 netlbl_req_delattr(req);
Paul Moore389fb8002009-03-27 17:10:34 -04001219 ret_val = 0;
1220 break;
1221 default:
1222 ret_val = -ENOENT;
1223 }
1224 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001225#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -04001226 case AF_INET6:
Huw Daviese1adea92016-06-27 15:05:29 -04001227 entry = netlbl_domhsh_getentry_af6(secattr->domain,
1228 &ireq->ir_v6_rmt_addr);
1229 if (entry == NULL) {
1230 ret_val = -ENOENT;
1231 goto req_setattr_return;
1232 }
1233 switch (entry->type) {
1234 case NETLBL_NLTYPE_CALIPSO:
1235 ret_val = calipso_req_setattr(req,
1236 entry->calipso, secattr);
1237 break;
1238 case NETLBL_NLTYPE_UNLABELED:
1239 netlbl_req_delattr(req);
1240 ret_val = 0;
1241 break;
1242 default:
1243 ret_val = -ENOENT;
1244 }
Paul Moore389fb8002009-03-27 17:10:34 -04001245 break;
1246#endif /* IPv6 */
1247 default:
1248 ret_val = -EPROTONOSUPPORT;
1249 }
1250
1251req_setattr_return:
1252 rcu_read_unlock();
1253 return ret_val;
1254}
1255
1256/**
Paul Moore07feee82009-03-27 17:10:54 -04001257* netlbl_req_delattr - Delete all the NetLabel labels on a socket
1258* @req: the socket
1259*
1260* Description:
1261* Remove all the NetLabel labeling from @req.
1262*
1263*/
1264void netlbl_req_delattr(struct request_sock *req)
1265{
Paul Moore0e0e3672016-06-06 15:17:20 -04001266 switch (req->rsk_ops->family) {
1267 case AF_INET:
1268 cipso_v4_req_delattr(req);
1269 break;
Huw Daviese1adea92016-06-27 15:05:29 -04001270#if IS_ENABLED(CONFIG_IPV6)
1271 case AF_INET6:
1272 calipso_req_delattr(req);
1273 break;
1274#endif /* IPv6 */
Paul Moore0e0e3672016-06-06 15:17:20 -04001275 }
Paul Moore07feee82009-03-27 17:10:54 -04001276}
1277
1278/**
Paul Moore948bf852008-10-10 10:16:32 -04001279 * netlbl_skbuff_setattr - Label a packet using the correct protocol
1280 * @skb: the packet
1281 * @family: protocol family
1282 * @secattr: the security attributes
1283 *
1284 * Description:
1285 * Attach the correct label to the given packet using the security attributes
1286 * specified in @secattr. Returns zero on success, negative values on failure.
1287 *
1288 */
1289int netlbl_skbuff_setattr(struct sk_buff *skb,
1290 u16 family,
1291 const struct netlbl_lsm_secattr *secattr)
1292{
1293 int ret_val;
1294 struct iphdr *hdr4;
Huw Davies2917f572016-06-27 15:06:15 -04001295#if IS_ENABLED(CONFIG_IPV6)
1296 struct ipv6hdr *hdr6;
1297#endif
Paul Moore6a8b7f02013-08-02 14:45:08 -04001298 struct netlbl_dommap_def *entry;
Paul Moore948bf852008-10-10 10:16:32 -04001299
1300 rcu_read_lock();
1301 switch (family) {
1302 case AF_INET:
1303 hdr4 = ip_hdr(skb);
Huw Davies2917f572016-06-27 15:06:15 -04001304 entry = netlbl_domhsh_getentry_af4(secattr->domain,
1305 hdr4->daddr);
Paul Moore6a8b7f02013-08-02 14:45:08 -04001306 if (entry == NULL) {
Paul Moore948bf852008-10-10 10:16:32 -04001307 ret_val = -ENOENT;
1308 goto skbuff_setattr_return;
1309 }
Paul Moore6a8b7f02013-08-02 14:45:08 -04001310 switch (entry->type) {
Paul Moore948bf852008-10-10 10:16:32 -04001311 case NETLBL_NLTYPE_CIPSOV4:
Paul Moore6a8b7f02013-08-02 14:45:08 -04001312 ret_val = cipso_v4_skbuff_setattr(skb, entry->cipso,
1313 secattr);
Paul Moore948bf852008-10-10 10:16:32 -04001314 break;
1315 case NETLBL_NLTYPE_UNLABELED:
1316 /* just delete the protocols we support for right now
1317 * but we could remove other protocols if needed */
1318 ret_val = cipso_v4_skbuff_delattr(skb);
1319 break;
1320 default:
1321 ret_val = -ENOENT;
1322 }
1323 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001324#if IS_ENABLED(CONFIG_IPV6)
Paul Moore948bf852008-10-10 10:16:32 -04001325 case AF_INET6:
Huw Davies2917f572016-06-27 15:06:15 -04001326 hdr6 = ipv6_hdr(skb);
1327 entry = netlbl_domhsh_getentry_af6(secattr->domain,
1328 &hdr6->daddr);
1329 if (entry == NULL) {
1330 ret_val = -ENOENT;
1331 goto skbuff_setattr_return;
1332 }
1333 switch (entry->type) {
1334 case NETLBL_NLTYPE_CALIPSO:
1335 ret_val = calipso_skbuff_setattr(skb, entry->calipso,
1336 secattr);
1337 break;
1338 case NETLBL_NLTYPE_UNLABELED:
1339 /* just delete the protocols we support for right now
1340 * but we could remove other protocols if needed */
1341 ret_val = calipso_skbuff_delattr(skb);
1342 break;
1343 default:
1344 ret_val = -ENOENT;
1345 }
Paul Moore948bf852008-10-10 10:16:32 -04001346 break;
1347#endif /* IPv6 */
1348 default:
Paul Moore389fb8002009-03-27 17:10:34 -04001349 ret_val = -EPROTONOSUPPORT;
Paul Moore948bf852008-10-10 10:16:32 -04001350 }
1351
1352skbuff_setattr_return:
1353 rcu_read_unlock();
1354 return ret_val;
1355}
1356
1357/**
Paul Moored15c3452006-08-03 16:48:37 -07001358 * netlbl_skbuff_getattr - Determine the security attributes of a packet
1359 * @skb: the packet
Paul Moore75e22912008-01-29 08:38:04 -05001360 * @family: protocol family
Paul Moored15c3452006-08-03 16:48:37 -07001361 * @secattr: the security attributes
1362 *
1363 * Description:
1364 * Examines the given packet to see if a recognized form of packet labeling
1365 * is present, if so it parses the packet label and returns the security
1366 * attributes in @secattr. Returns zero on success, negative values on
1367 * failure.
1368 *
1369 */
1370int netlbl_skbuff_getattr(const struct sk_buff *skb,
Paul Moore75e22912008-01-29 08:38:04 -05001371 u16 family,
Paul Moored15c3452006-08-03 16:48:37 -07001372 struct netlbl_lsm_secattr *secattr)
1373{
Paul Moore04f81f02015-02-11 14:46:37 -05001374 unsigned char *ptr;
1375
Paul Moore389fb8002009-03-27 17:10:34 -04001376 switch (family) {
1377 case AF_INET:
Paul Moore04f81f02015-02-11 14:46:37 -05001378 ptr = cipso_v4_optptr(skb);
1379 if (ptr && cipso_v4_getattr(ptr, secattr) == 0)
Paul Moore389fb8002009-03-27 17:10:34 -04001380 return 0;
1381 break;
Eric Dumazetdfd56b82011-12-10 09:48:31 +00001382#if IS_ENABLED(CONFIG_IPV6)
Paul Moore389fb8002009-03-27 17:10:34 -04001383 case AF_INET6:
Huw Davies2917f572016-06-27 15:06:15 -04001384 ptr = calipso_optptr(skb);
1385 if (ptr && calipso_getattr(ptr, secattr) == 0)
1386 return 0;
Paul Moore389fb8002009-03-27 17:10:34 -04001387 break;
1388#endif /* IPv6 */
1389 }
Paul Moored15c3452006-08-03 16:48:37 -07001390
Paul Moore8cc44572008-01-29 08:44:21 -05001391 return netlbl_unlabel_getattr(skb, family, secattr);
Paul Moored15c3452006-08-03 16:48:37 -07001392}
1393
1394/**
1395 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
1396 * @skb: the packet
Huw Daviesa04e71f2016-06-27 15:06:16 -04001397 * @family: the family
Paul Moored15c3452006-08-03 16:48:37 -07001398 * @error: the error code
Paul Mooredfaebe92008-10-10 10:16:31 -04001399 * @gateway: true if host is acting as a gateway, false otherwise
Paul Moored15c3452006-08-03 16:48:37 -07001400 *
1401 * Description:
1402 * Deal with a LSM problem when handling the packet in @skb, typically this is
1403 * a permission denied problem (-EACCES). The correct action is determined
1404 * according to the packet's labeling protocol.
1405 *
1406 */
Huw Daviesa04e71f2016-06-27 15:06:16 -04001407void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway)
Paul Moored15c3452006-08-03 16:48:37 -07001408{
Huw Daviesa04e71f2016-06-27 15:06:16 -04001409 switch (family) {
1410 case AF_INET:
1411 if (cipso_v4_optptr(skb))
1412 cipso_v4_error(skb, error, gateway);
1413 break;
1414 }
Paul Moored15c3452006-08-03 16:48:37 -07001415}
1416
1417/**
1418 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
1419 *
1420 * Description:
1421 * For all of the NetLabel protocols that support some form of label mapping
1422 * cache, invalidate the cache. Returns zero on success, negative values on
1423 * error.
1424 *
1425 */
1426void netlbl_cache_invalidate(void)
1427{
1428 cipso_v4_cache_invalidate();
Huw Davies4fee5242016-06-27 15:06:17 -04001429#if IS_ENABLED(CONFIG_IPV6)
1430 calipso_cache_invalidate();
1431#endif /* IPv6 */
Paul Moored15c3452006-08-03 16:48:37 -07001432}
1433
1434/**
1435 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
1436 * @skb: the packet
Huw Davies4fee5242016-06-27 15:06:17 -04001437 * @family: the family
Paul Moored15c3452006-08-03 16:48:37 -07001438 * @secattr: the packet's security attributes
1439 *
1440 * Description:
1441 * Add the LSM security attributes for the given packet to the underlying
1442 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1443 * values on error.
1444 *
1445 */
Huw Davies4fee5242016-06-27 15:06:17 -04001446int netlbl_cache_add(const struct sk_buff *skb, u16 family,
Paul Moored15c3452006-08-03 16:48:37 -07001447 const struct netlbl_lsm_secattr *secattr)
1448{
Paul Moore04f81f02015-02-11 14:46:37 -05001449 unsigned char *ptr;
1450
Paul Moore701a90b2006-11-17 17:38:46 -05001451 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
Paul Moored15c3452006-08-03 16:48:37 -07001452 return -ENOMSG;
1453
Huw Davies4fee5242016-06-27 15:06:17 -04001454 switch (family) {
1455 case AF_INET:
1456 ptr = cipso_v4_optptr(skb);
1457 if (ptr)
1458 return cipso_v4_cache_add(ptr, secattr);
1459 break;
1460#if IS_ENABLED(CONFIG_IPV6)
1461 case AF_INET6:
1462 ptr = calipso_optptr(skb);
1463 if (ptr)
1464 return calipso_cache_add(ptr, secattr);
1465 break;
1466#endif /* IPv6 */
1467 }
Paul Moored15c3452006-08-03 16:48:37 -07001468 return -ENOMSG;
1469}
1470
1471/*
Paul Moore6c2e8ac2008-12-31 12:54:11 -05001472 * Protocol Engine Functions
1473 */
1474
1475/**
1476 * netlbl_audit_start - Start an audit message
1477 * @type: audit message type
1478 * @audit_info: NetLabel audit information
1479 *
1480 * Description:
1481 * Start an audit message using the type specified in @type and fill the audit
1482 * message with some fields common to all NetLabel audit messages. This
1483 * function should only be used by protocol engines, not LSMs. Returns a
1484 * pointer to the audit buffer on success, NULL on failure.
1485 *
1486 */
1487struct audit_buffer *netlbl_audit_start(int type,
1488 struct netlbl_audit *audit_info)
1489{
1490 return netlbl_audit_start_common(type, audit_info);
1491}
Huw Daviescb72d382016-06-27 15:02:46 -04001492EXPORT_SYMBOL(netlbl_audit_start);
Paul Moore6c2e8ac2008-12-31 12:54:11 -05001493
1494/*
Paul Moored15c3452006-08-03 16:48:37 -07001495 * Setup Functions
1496 */
1497
1498/**
1499 * netlbl_init - Initialize NetLabel
1500 *
1501 * Description:
1502 * Perform the required NetLabel initialization before first use.
1503 *
1504 */
1505static int __init netlbl_init(void)
1506{
1507 int ret_val;
1508
1509 printk(KERN_INFO "NetLabel: Initializing\n");
1510 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1511 (1 << NETLBL_DOMHSH_BITSIZE));
Paul Moorebcd5e1a2017-01-06 14:26:54 -05001512 printk(KERN_INFO "NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO\n");
Paul Moored15c3452006-08-03 16:48:37 -07001513
1514 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1515 if (ret_val != 0)
1516 goto init_failure;
1517
Paul Moore8cc44572008-01-29 08:44:21 -05001518 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1519 if (ret_val != 0)
1520 goto init_failure;
1521
Paul Moored15c3452006-08-03 16:48:37 -07001522 ret_val = netlbl_netlink_init();
1523 if (ret_val != 0)
1524 goto init_failure;
1525
1526 ret_val = netlbl_unlabel_defconf();
1527 if (ret_val != 0)
1528 goto init_failure;
1529 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1530
1531 return 0;
1532
1533init_failure:
1534 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1535}
1536
1537subsys_initcall(netlbl_init);