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1/*
2 * NetLabel System
3 *
4 * The NetLabel system manages static and dynamic label mappings for network
5 * protocols such as CIPSO and RIPSO.
6 *
7 * Author: Paul Moore <paul@paul-moore.com>
8 *
9 */
10
11/*
12 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
22 * the GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 *
27 */
28
29#ifndef _NETLABEL_H
30#define _NETLABEL_H
31
32#include <linux/types.h>
33#include <linux/slab.h>
34#include <linux/net.h>
35#include <linux/skbuff.h>
36#include <linux/in.h>
37#include <linux/in6.h>
38#include <net/netlink.h>
39#include <net/request_sock.h>
40#include <linux/refcount.h>
41
42struct cipso_v4_doi;
43struct calipso_doi;
44
45/*
46 * NetLabel - A management interface for maintaining network packet label
47 * mapping tables for explicit packet labling protocols.
48 *
49 * Network protocols such as CIPSO and RIPSO require a label translation layer
50 * to convert the label on the packet into something meaningful on the host
51 * machine. In the current Linux implementation these mapping tables live
52 * inside the kernel; NetLabel provides a mechanism for user space applications
53 * to manage these mapping tables.
54 *
55 * NetLabel makes use of the Generic NETLINK mechanism as a transport layer to
56 * send messages between kernel and user space. The general format of a
57 * NetLabel message is shown below:
58 *
59 * +-----------------+-------------------+--------- --- -- -
60 * | struct nlmsghdr | struct genlmsghdr | payload
61 * +-----------------+-------------------+--------- --- -- -
62 *
63 * The 'nlmsghdr' and 'genlmsghdr' structs should be dealt with like normal.
64 * The payload is dependent on the subsystem specified in the
65 * 'nlmsghdr->nlmsg_type' and should be defined below, supporting functions
66 * should be defined in the corresponding net/netlabel/netlabel_<subsys>.h|c
67 * file. All of the fields in the NetLabel payload are NETLINK attributes, see
68 * the include/net/netlink.h file for more information on NETLINK attributes.
69 *
70 */
71
72/*
73 * NetLabel NETLINK protocol
74 */
75
76/* NetLabel NETLINK protocol version
77 * 1: initial version
78 * 2: added static labels for unlabeled connections
79 * 3: network selectors added to the NetLabel/LSM domain mapping and the
80 * CIPSO_V4_MAP_LOCAL CIPSO mapping was added
81 */
82#define NETLBL_PROTO_VERSION 3
83
84/* NetLabel NETLINK types/families */
85#define NETLBL_NLTYPE_NONE 0
86#define NETLBL_NLTYPE_MGMT 1
87#define NETLBL_NLTYPE_MGMT_NAME "NLBL_MGMT"
88#define NETLBL_NLTYPE_RIPSO 2
89#define NETLBL_NLTYPE_RIPSO_NAME "NLBL_RIPSO"
90#define NETLBL_NLTYPE_CIPSOV4 3
91#define NETLBL_NLTYPE_CIPSOV4_NAME "NLBL_CIPSOv4"
92#define NETLBL_NLTYPE_CIPSOV6 4
93#define NETLBL_NLTYPE_CIPSOV6_NAME "NLBL_CIPSOv6"
94#define NETLBL_NLTYPE_UNLABELED 5
95#define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL"
96#define NETLBL_NLTYPE_ADDRSELECT 6
97#define NETLBL_NLTYPE_ADDRSELECT_NAME "NLBL_ADRSEL"
98#define NETLBL_NLTYPE_CALIPSO 7
99#define NETLBL_NLTYPE_CALIPSO_NAME "NLBL_CALIPSO"
100
101/*
102 * NetLabel - Kernel API for accessing the network packet label mappings.
103 *
104 * The following functions are provided for use by other kernel modules,
105 * specifically kernel LSM modules, to provide a consistent, transparent API
106 * for dealing with explicit packet labeling protocols such as CIPSO and
107 * RIPSO. The functions defined here are implemented in the
108 * net/netlabel/netlabel_kapi.c file.
109 *
110 */
111
112/* NetLabel audit information */
113struct netlbl_audit {
114 u32 secid;
115 kuid_t loginuid;
116 unsigned int sessionid;
117};
118
119/*
120 * LSM security attributes
121 */
122
123/**
124 * struct netlbl_lsm_cache - NetLabel LSM security attribute cache
125 * @refcount: atomic reference counter
126 * @free: LSM supplied function to free the cache data
127 * @data: LSM supplied cache data
128 *
129 * Description:
130 * This structure is provided for LSMs which wish to make use of the NetLabel
131 * caching mechanism to store LSM specific data/attributes in the NetLabel
132 * cache. If the LSM has to perform a lot of translation from the NetLabel
133 * security attributes into it's own internal representation then the cache
134 * mechanism can provide a way to eliminate some or all of that translation
135 * overhead on a cache hit.
136 *
137 */
138struct netlbl_lsm_cache {
139 refcount_t refcount;
140 void (*free) (const void *data);
141 void *data;
142};
143
144/**
145 * struct netlbl_lsm_catmap - NetLabel LSM secattr category bitmap
146 * @startbit: the value of the lowest order bit in the bitmap
147 * @bitmap: the category bitmap
148 * @next: pointer to the next bitmap "node" or NULL
149 *
150 * Description:
151 * This structure is used to represent category bitmaps. Due to the large
152 * number of categories supported by most labeling protocols it is not
153 * practical to transfer a full bitmap internally so NetLabel adopts a sparse
154 * bitmap structure modeled after SELinux's ebitmap structure.
155 * The catmap bitmap field MUST be a power of two in length and large
156 * enough to hold at least 240 bits. Special care (i.e. check the code!)
157 * should be used when changing these values as the LSM implementation
158 * probably has functions which rely on the sizes of these types to speed
159 * processing.
160 *
161 */
162#define NETLBL_CATMAP_MAPTYPE u64
163#define NETLBL_CATMAP_MAPCNT 4
164#define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8)
165#define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \
166 NETLBL_CATMAP_MAPCNT)
167#define NETLBL_CATMAP_BIT (NETLBL_CATMAP_MAPTYPE)0x01
168struct netlbl_lsm_catmap {
169 u32 startbit;
170 NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT];
171 struct netlbl_lsm_catmap *next;
172};
173
174/**
175 * struct netlbl_lsm_secattr - NetLabel LSM security attributes
176 * @flags: indicate structure attributes, see NETLBL_SECATTR_*
177 * @type: indicate the NLTYPE of the attributes
178 * @domain: the NetLabel LSM domain
179 * @cache: NetLabel LSM specific cache
180 * @attr.mls: MLS sensitivity label
181 * @attr.mls.cat: MLS category bitmap
182 * @attr.mls.lvl: MLS sensitivity level
183 * @attr.secid: LSM specific secid token
184 *
185 * Description:
186 * This structure is used to pass security attributes between NetLabel and the
187 * LSM modules. The flags field is used to specify which fields within the
188 * struct are valid and valid values can be created by bitwise OR'ing the
189 * NETLBL_SECATTR_* defines. The domain field is typically set by the LSM to
190 * specify domain specific configuration settings and is not usually used by
191 * NetLabel itself when returning security attributes to the LSM.
192 *
193 */
194struct netlbl_lsm_secattr {
195 u32 flags;
196 /* bitmap values for 'flags' */
197#define NETLBL_SECATTR_NONE 0x00000000
198#define NETLBL_SECATTR_DOMAIN 0x00000001
199#define NETLBL_SECATTR_DOMAIN_CPY (NETLBL_SECATTR_DOMAIN | \
200 NETLBL_SECATTR_FREE_DOMAIN)
201#define NETLBL_SECATTR_CACHE 0x00000002
202#define NETLBL_SECATTR_MLS_LVL 0x00000004
203#define NETLBL_SECATTR_MLS_CAT 0x00000008
204#define NETLBL_SECATTR_SECID 0x00000010
205 /* bitmap meta-values for 'flags' */
206#define NETLBL_SECATTR_FREE_DOMAIN 0x01000000
207#define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL | \
208 NETLBL_SECATTR_MLS_CAT | \
209 NETLBL_SECATTR_SECID)
210 u32 type;
211 char *domain;
212 struct netlbl_lsm_cache *cache;
213 struct {
214 struct {
215 struct netlbl_lsm_catmap *cat;
216 u32 lvl;
217 } mls;
218 u32 secid;
219 } attr;
220};
221
222/**
223 * struct netlbl_calipso_ops - NetLabel CALIPSO operations
224 * @doi_add: add a CALIPSO DOI
225 * @doi_free: free a CALIPSO DOI
226 * @doi_getdef: returns a reference to a DOI
227 * @doi_putdef: releases a reference of a DOI
228 * @doi_walk: enumerate the DOI list
229 * @sock_getattr: retrieve the socket's attr
230 * @sock_setattr: set the socket's attr
231 * @sock_delattr: remove the socket's attr
232 * @req_setattr: set the req socket's attr
233 * @req_delattr: remove the req socket's attr
234 * @opt_getattr: retrieve attr from memory block
235 * @skbuff_optptr: find option in packet
236 * @skbuff_setattr: set the skbuff's attr
237 * @skbuff_delattr: remove the skbuff's attr
238 * @cache_invalidate: invalidate cache
239 * @cache_add: add cache entry
240 *
241 * Description:
242 * This structure is filled out by the CALIPSO engine and passed
243 * to the NetLabel core via a call to netlbl_calipso_ops_register().
244 * It enables the CALIPSO engine (and hence IPv6) to be compiled
245 * as a module.
246 */
247struct netlbl_calipso_ops {
248 int (*doi_add)(struct calipso_doi *doi_def,
249 struct netlbl_audit *audit_info);
250 void (*doi_free)(struct calipso_doi *doi_def);
251 int (*doi_remove)(u32 doi, struct netlbl_audit *audit_info);
252 struct calipso_doi *(*doi_getdef)(u32 doi);
253 void (*doi_putdef)(struct calipso_doi *doi_def);
254 int (*doi_walk)(u32 *skip_cnt,
255 int (*callback)(struct calipso_doi *doi_def, void *arg),
256 void *cb_arg);
257 int (*sock_getattr)(struct sock *sk,
258 struct netlbl_lsm_secattr *secattr);
259 int (*sock_setattr)(struct sock *sk,
260 const struct calipso_doi *doi_def,
261 const struct netlbl_lsm_secattr *secattr);
262 void (*sock_delattr)(struct sock *sk);
263 int (*req_setattr)(struct request_sock *req,
264 const struct calipso_doi *doi_def,
265 const struct netlbl_lsm_secattr *secattr);
266 void (*req_delattr)(struct request_sock *req);
267 int (*opt_getattr)(const unsigned char *calipso,
268 struct netlbl_lsm_secattr *secattr);
269 unsigned char *(*skbuff_optptr)(const struct sk_buff *skb);
270 int (*skbuff_setattr)(struct sk_buff *skb,
271 const struct calipso_doi *doi_def,
272 const struct netlbl_lsm_secattr *secattr);
273 int (*skbuff_delattr)(struct sk_buff *skb);
274 void (*cache_invalidate)(void);
275 int (*cache_add)(const unsigned char *calipso_ptr,
276 const struct netlbl_lsm_secattr *secattr);
277};
278
279/*
280 * LSM security attribute operations (inline)
281 */
282
283/**
284 * netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache
285 * @flags: the memory allocation flags
286 *
287 * Description:
288 * Allocate and initialize a netlbl_lsm_cache structure. Returns a pointer
289 * on success, NULL on failure.
290 *
291 */
292static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags)
293{
294 struct netlbl_lsm_cache *cache;
295
296 cache = kzalloc(sizeof(*cache), flags);
297 if (cache)
298 refcount_set(&cache->refcount, 1);
299 return cache;
300}
301
302/**
303 * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct
304 * @cache: the struct to free
305 *
306 * Description:
307 * Frees @secattr including all of the internal buffers.
308 *
309 */
310static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
311{
312 if (!refcount_dec_and_test(&cache->refcount))
313 return;
314
315 if (cache->free)
316 cache->free(cache->data);
317 kfree(cache);
318}
319
320/**
321 * netlbl_catmap_alloc - Allocate a LSM secattr catmap
322 * @flags: memory allocation flags
323 *
324 * Description:
325 * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL
326 * on failure.
327 *
328 */
329static inline struct netlbl_lsm_catmap *netlbl_catmap_alloc(gfp_t flags)
330{
331 return kzalloc(sizeof(struct netlbl_lsm_catmap), flags);
332}
333
334/**
335 * netlbl_catmap_free - Free a LSM secattr catmap
336 * @catmap: the category bitmap
337 *
338 * Description:
339 * Free a LSM secattr catmap.
340 *
341 */
342static inline void netlbl_catmap_free(struct netlbl_lsm_catmap *catmap)
343{
344 struct netlbl_lsm_catmap *iter;
345
346 while (catmap) {
347 iter = catmap;
348 catmap = catmap->next;
349 kfree(iter);
350 }
351}
352
353/**
354 * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct
355 * @secattr: the struct to initialize
356 *
357 * Description:
358 * Initialize an already allocated netlbl_lsm_secattr struct.
359 *
360 */
361static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
362{
363 memset(secattr, 0, sizeof(*secattr));
364}
365
366/**
367 * netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct
368 * @secattr: the struct to clear
369 *
370 * Description:
371 * Destroys the @secattr struct, including freeing all of the internal buffers.
372 * The struct must be reset with a call to netlbl_secattr_init() before reuse.
373 *
374 */
375static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
376{
377 if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN)
378 kfree(secattr->domain);
379 if (secattr->flags & NETLBL_SECATTR_CACHE)
380 netlbl_secattr_cache_free(secattr->cache);
381 if (secattr->flags & NETLBL_SECATTR_MLS_CAT)
382 netlbl_catmap_free(secattr->attr.mls.cat);
383}
384
385/**
386 * netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct
387 * @flags: the memory allocation flags
388 *
389 * Description:
390 * Allocate and initialize a netlbl_lsm_secattr struct. Returns a valid
391 * pointer on success, or NULL on failure.
392 *
393 */
394static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags)
395{
396 return kzalloc(sizeof(struct netlbl_lsm_secattr), flags);
397}
398
399/**
400 * netlbl_secattr_free - Frees a netlbl_lsm_secattr struct
401 * @secattr: the struct to free
402 *
403 * Description:
404 * Frees @secattr including all of the internal buffers.
405 *
406 */
407static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
408{
409 netlbl_secattr_destroy(secattr);
410 kfree(secattr);
411}
412
413#ifdef CONFIG_NETLABEL
414/*
415 * LSM configuration operations
416 */
417int netlbl_cfg_map_del(const char *domain,
418 u16 family,
419 const void *addr,
420 const void *mask,
421 struct netlbl_audit *audit_info);
422int netlbl_cfg_unlbl_map_add(const char *domain,
423 u16 family,
424 const void *addr,
425 const void *mask,
426 struct netlbl_audit *audit_info);
427int netlbl_cfg_unlbl_static_add(struct net *net,
428 const char *dev_name,
429 const void *addr,
430 const void *mask,
431 u16 family,
432 u32 secid,
433 struct netlbl_audit *audit_info);
434int netlbl_cfg_unlbl_static_del(struct net *net,
435 const char *dev_name,
436 const void *addr,
437 const void *mask,
438 u16 family,
439 struct netlbl_audit *audit_info);
440int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
441 struct netlbl_audit *audit_info);
442void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info);
443int netlbl_cfg_cipsov4_map_add(u32 doi,
444 const char *domain,
445 const struct in_addr *addr,
446 const struct in_addr *mask,
447 struct netlbl_audit *audit_info);
448int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
449 struct netlbl_audit *audit_info);
450void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info);
451int netlbl_cfg_calipso_map_add(u32 doi,
452 const char *domain,
453 const struct in6_addr *addr,
454 const struct in6_addr *mask,
455 struct netlbl_audit *audit_info);
456/*
457 * LSM security attribute operations
458 */
459int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset);
460int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset);
461int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
462 u32 *offset,
463 unsigned long *bitmap);
464int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
465 u32 bit,
466 gfp_t flags);
467int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
468 u32 start,
469 u32 end,
470 gfp_t flags);
471int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
472 u32 offset,
473 unsigned long bitmap,
474 gfp_t flags);
475
476/* Bitmap functions
477 */
478int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len,
479 u32 offset, u8 state);
480void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state);
481
482/*
483 * LSM protocol operations (NetLabel LSM/kernel API)
484 */
485int netlbl_enabled(void);
486int netlbl_sock_setattr(struct sock *sk,
487 u16 family,
488 const struct netlbl_lsm_secattr *secattr);
489void netlbl_sock_delattr(struct sock *sk);
490int netlbl_sock_getattr(struct sock *sk,
491 struct netlbl_lsm_secattr *secattr);
492int netlbl_conn_setattr(struct sock *sk,
493 struct sockaddr *addr,
494 const struct netlbl_lsm_secattr *secattr);
495int netlbl_req_setattr(struct request_sock *req,
496 const struct netlbl_lsm_secattr *secattr);
497void netlbl_req_delattr(struct request_sock *req);
498int netlbl_skbuff_setattr(struct sk_buff *skb,
499 u16 family,
500 const struct netlbl_lsm_secattr *secattr);
501int netlbl_skbuff_getattr(const struct sk_buff *skb,
502 u16 family,
503 struct netlbl_lsm_secattr *secattr);
504void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway);
505
506/*
507 * LSM label mapping cache operations
508 */
509void netlbl_cache_invalidate(void);
510int netlbl_cache_add(const struct sk_buff *skb, u16 family,
511 const struct netlbl_lsm_secattr *secattr);
512
513/*
514 * Protocol engine operations
515 */
516struct audit_buffer *netlbl_audit_start(int type,
517 struct netlbl_audit *audit_info);
518#else
519static inline int netlbl_cfg_map_del(const char *domain,
520 u16 family,
521 const void *addr,
522 const void *mask,
523 struct netlbl_audit *audit_info)
524{
525 return -ENOSYS;
526}
527static inline int netlbl_cfg_unlbl_map_add(const char *domain,
528 u16 family,
529 void *addr,
530 void *mask,
531 struct netlbl_audit *audit_info)
532{
533 return -ENOSYS;
534}
535static inline int netlbl_cfg_unlbl_static_add(struct net *net,
536 const char *dev_name,
537 const void *addr,
538 const void *mask,
539 u16 family,
540 u32 secid,
541 struct netlbl_audit *audit_info)
542{
543 return -ENOSYS;
544}
545static inline int netlbl_cfg_unlbl_static_del(struct net *net,
546 const char *dev_name,
547 const void *addr,
548 const void *mask,
549 u16 family,
550 struct netlbl_audit *audit_info)
551{
552 return -ENOSYS;
553}
554static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
555 struct netlbl_audit *audit_info)
556{
557 return -ENOSYS;
558}
559static inline void netlbl_cfg_cipsov4_del(u32 doi,
560 struct netlbl_audit *audit_info)
561{
562 return;
563}
564static inline int netlbl_cfg_cipsov4_map_add(u32 doi,
565 const char *domain,
566 const struct in_addr *addr,
567 const struct in_addr *mask,
568 struct netlbl_audit *audit_info)
569{
570 return -ENOSYS;
571}
572static inline int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
573 struct netlbl_audit *audit_info)
574{
575 return -ENOSYS;
576}
577static inline void netlbl_cfg_calipso_del(u32 doi,
578 struct netlbl_audit *audit_info)
579{
580 return;
581}
582static inline int netlbl_cfg_calipso_map_add(u32 doi,
583 const char *domain,
584 const struct in6_addr *addr,
585 const struct in6_addr *mask,
586 struct netlbl_audit *audit_info)
587{
588 return -ENOSYS;
589}
590static inline int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap,
591 u32 offset)
592{
593 return -ENOENT;
594}
595static inline int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap,
596 u32 offset)
597{
598 return -ENOENT;
599}
600static inline int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
601 u32 *offset,
602 unsigned long *bitmap)
603{
604 return 0;
605}
606static inline int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
607 u32 bit,
608 gfp_t flags)
609{
610 return 0;
611}
612static inline int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
613 u32 start,
614 u32 end,
615 gfp_t flags)
616{
617 return 0;
618}
619static inline int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
620 u32 offset,
621 unsigned long bitmap,
622 gfp_t flags)
623{
624 return 0;
625}
626static inline int netlbl_enabled(void)
627{
628 return 0;
629}
630static inline int netlbl_sock_setattr(struct sock *sk,
631 u16 family,
632 const struct netlbl_lsm_secattr *secattr)
633{
634 return -ENOSYS;
635}
636static inline void netlbl_sock_delattr(struct sock *sk)
637{
638}
639static inline int netlbl_sock_getattr(struct sock *sk,
640 struct netlbl_lsm_secattr *secattr)
641{
642 return -ENOSYS;
643}
644static inline int netlbl_conn_setattr(struct sock *sk,
645 struct sockaddr *addr,
646 const struct netlbl_lsm_secattr *secattr)
647{
648 return -ENOSYS;
649}
650static inline int netlbl_req_setattr(struct request_sock *req,
651 const struct netlbl_lsm_secattr *secattr)
652{
653 return -ENOSYS;
654}
655static inline void netlbl_req_delattr(struct request_sock *req)
656{
657 return;
658}
659static inline int netlbl_skbuff_setattr(struct sk_buff *skb,
660 u16 family,
661 const struct netlbl_lsm_secattr *secattr)
662{
663 return -ENOSYS;
664}
665static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
666 u16 family,
667 struct netlbl_lsm_secattr *secattr)
668{
669 return -ENOSYS;
670}
671static inline void netlbl_skbuff_err(struct sk_buff *skb,
672 int error,
673 int gateway)
674{
675 return;
676}
677static inline void netlbl_cache_invalidate(void)
678{
679 return;
680}
681static inline int netlbl_cache_add(const struct sk_buff *skb, u16 family,
682 const struct netlbl_lsm_secattr *secattr)
683{
684 return 0;
685}
686static inline struct audit_buffer *netlbl_audit_start(int type,
687 struct netlbl_audit *audit_info)
688{
689 return NULL;
690}
691#endif /* CONFIG_NETLABEL */
692
693const struct netlbl_calipso_ops *
694netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops);
695
696#endif /* _NETLABEL_H */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * NetLabel System
4 *
5 * The NetLabel system manages static and dynamic label mappings for network
6 * protocols such as CIPSO and RIPSO.
7 *
8 * Author: Paul Moore <paul@paul-moore.com>
9 */
10
11/*
12 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
13 */
14
15#ifndef _NETLABEL_H
16#define _NETLABEL_H
17
18#include <linux/types.h>
19#include <linux/slab.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
22#include <linux/in.h>
23#include <linux/in6.h>
24#include <net/netlink.h>
25#include <net/request_sock.h>
26#include <linux/refcount.h>
27
28struct cipso_v4_doi;
29struct calipso_doi;
30
31/*
32 * NetLabel - A management interface for maintaining network packet label
33 * mapping tables for explicit packet labling protocols.
34 *
35 * Network protocols such as CIPSO and RIPSO require a label translation layer
36 * to convert the label on the packet into something meaningful on the host
37 * machine. In the current Linux implementation these mapping tables live
38 * inside the kernel; NetLabel provides a mechanism for user space applications
39 * to manage these mapping tables.
40 *
41 * NetLabel makes use of the Generic NETLINK mechanism as a transport layer to
42 * send messages between kernel and user space. The general format of a
43 * NetLabel message is shown below:
44 *
45 * +-----------------+-------------------+--------- --- -- -
46 * | struct nlmsghdr | struct genlmsghdr | payload
47 * +-----------------+-------------------+--------- --- -- -
48 *
49 * The 'nlmsghdr' and 'genlmsghdr' structs should be dealt with like normal.
50 * The payload is dependent on the subsystem specified in the
51 * 'nlmsghdr->nlmsg_type' and should be defined below, supporting functions
52 * should be defined in the corresponding net/netlabel/netlabel_<subsys>.h|c
53 * file. All of the fields in the NetLabel payload are NETLINK attributes, see
54 * the include/net/netlink.h file for more information on NETLINK attributes.
55 *
56 */
57
58/*
59 * NetLabel NETLINK protocol
60 */
61
62/* NetLabel NETLINK protocol version
63 * 1: initial version
64 * 2: added static labels for unlabeled connections
65 * 3: network selectors added to the NetLabel/LSM domain mapping and the
66 * CIPSO_V4_MAP_LOCAL CIPSO mapping was added
67 */
68#define NETLBL_PROTO_VERSION 3
69
70/* NetLabel NETLINK types/families */
71#define NETLBL_NLTYPE_NONE 0
72#define NETLBL_NLTYPE_MGMT 1
73#define NETLBL_NLTYPE_MGMT_NAME "NLBL_MGMT"
74#define NETLBL_NLTYPE_RIPSO 2
75#define NETLBL_NLTYPE_RIPSO_NAME "NLBL_RIPSO"
76#define NETLBL_NLTYPE_CIPSOV4 3
77#define NETLBL_NLTYPE_CIPSOV4_NAME "NLBL_CIPSOv4"
78#define NETLBL_NLTYPE_CIPSOV6 4
79#define NETLBL_NLTYPE_CIPSOV6_NAME "NLBL_CIPSOv6"
80#define NETLBL_NLTYPE_UNLABELED 5
81#define NETLBL_NLTYPE_UNLABELED_NAME "NLBL_UNLBL"
82#define NETLBL_NLTYPE_ADDRSELECT 6
83#define NETLBL_NLTYPE_ADDRSELECT_NAME "NLBL_ADRSEL"
84#define NETLBL_NLTYPE_CALIPSO 7
85#define NETLBL_NLTYPE_CALIPSO_NAME "NLBL_CALIPSO"
86
87/*
88 * NetLabel - Kernel API for accessing the network packet label mappings.
89 *
90 * The following functions are provided for use by other kernel modules,
91 * specifically kernel LSM modules, to provide a consistent, transparent API
92 * for dealing with explicit packet labeling protocols such as CIPSO and
93 * RIPSO. The functions defined here are implemented in the
94 * net/netlabel/netlabel_kapi.c file.
95 *
96 */
97
98/* NetLabel audit information */
99struct netlbl_audit {
100 u32 secid;
101 kuid_t loginuid;
102 unsigned int sessionid;
103};
104
105/*
106 * LSM security attributes
107 */
108
109/**
110 * struct netlbl_lsm_cache - NetLabel LSM security attribute cache
111 * @refcount: atomic reference counter
112 * @free: LSM supplied function to free the cache data
113 * @data: LSM supplied cache data
114 *
115 * Description:
116 * This structure is provided for LSMs which wish to make use of the NetLabel
117 * caching mechanism to store LSM specific data/attributes in the NetLabel
118 * cache. If the LSM has to perform a lot of translation from the NetLabel
119 * security attributes into it's own internal representation then the cache
120 * mechanism can provide a way to eliminate some or all of that translation
121 * overhead on a cache hit.
122 *
123 */
124struct netlbl_lsm_cache {
125 refcount_t refcount;
126 void (*free) (const void *data);
127 void *data;
128};
129
130/**
131 * struct netlbl_lsm_catmap - NetLabel LSM secattr category bitmap
132 * @startbit: the value of the lowest order bit in the bitmap
133 * @bitmap: the category bitmap
134 * @next: pointer to the next bitmap "node" or NULL
135 *
136 * Description:
137 * This structure is used to represent category bitmaps. Due to the large
138 * number of categories supported by most labeling protocols it is not
139 * practical to transfer a full bitmap internally so NetLabel adopts a sparse
140 * bitmap structure modeled after SELinux's ebitmap structure.
141 * The catmap bitmap field MUST be a power of two in length and large
142 * enough to hold at least 240 bits. Special care (i.e. check the code!)
143 * should be used when changing these values as the LSM implementation
144 * probably has functions which rely on the sizes of these types to speed
145 * processing.
146 *
147 */
148#define NETLBL_CATMAP_MAPTYPE u64
149#define NETLBL_CATMAP_MAPCNT 4
150#define NETLBL_CATMAP_MAPSIZE (sizeof(NETLBL_CATMAP_MAPTYPE) * 8)
151#define NETLBL_CATMAP_SIZE (NETLBL_CATMAP_MAPSIZE * \
152 NETLBL_CATMAP_MAPCNT)
153#define NETLBL_CATMAP_BIT (NETLBL_CATMAP_MAPTYPE)0x01
154struct netlbl_lsm_catmap {
155 u32 startbit;
156 NETLBL_CATMAP_MAPTYPE bitmap[NETLBL_CATMAP_MAPCNT];
157 struct netlbl_lsm_catmap *next;
158};
159
160/**
161 * struct netlbl_lsm_secattr - NetLabel LSM security attributes
162 * @flags: indicate structure attributes, see NETLBL_SECATTR_*
163 * @type: indicate the NLTYPE of the attributes
164 * @domain: the NetLabel LSM domain
165 * @cache: NetLabel LSM specific cache
166 * @attr.mls: MLS sensitivity label
167 * @attr.mls.cat: MLS category bitmap
168 * @attr.mls.lvl: MLS sensitivity level
169 * @attr.secid: LSM specific secid token
170 *
171 * Description:
172 * This structure is used to pass security attributes between NetLabel and the
173 * LSM modules. The flags field is used to specify which fields within the
174 * struct are valid and valid values can be created by bitwise OR'ing the
175 * NETLBL_SECATTR_* defines. The domain field is typically set by the LSM to
176 * specify domain specific configuration settings and is not usually used by
177 * NetLabel itself when returning security attributes to the LSM.
178 *
179 */
180struct netlbl_lsm_secattr {
181 u32 flags;
182 /* bitmap values for 'flags' */
183#define NETLBL_SECATTR_NONE 0x00000000
184#define NETLBL_SECATTR_DOMAIN 0x00000001
185#define NETLBL_SECATTR_DOMAIN_CPY (NETLBL_SECATTR_DOMAIN | \
186 NETLBL_SECATTR_FREE_DOMAIN)
187#define NETLBL_SECATTR_CACHE 0x00000002
188#define NETLBL_SECATTR_MLS_LVL 0x00000004
189#define NETLBL_SECATTR_MLS_CAT 0x00000008
190#define NETLBL_SECATTR_SECID 0x00000010
191 /* bitmap meta-values for 'flags' */
192#define NETLBL_SECATTR_FREE_DOMAIN 0x01000000
193#define NETLBL_SECATTR_CACHEABLE (NETLBL_SECATTR_MLS_LVL | \
194 NETLBL_SECATTR_MLS_CAT | \
195 NETLBL_SECATTR_SECID)
196 u32 type;
197 char *domain;
198 struct netlbl_lsm_cache *cache;
199 struct {
200 struct {
201 struct netlbl_lsm_catmap *cat;
202 u32 lvl;
203 } mls;
204 u32 secid;
205 } attr;
206};
207
208/**
209 * struct netlbl_calipso_ops - NetLabel CALIPSO operations
210 * @doi_add: add a CALIPSO DOI
211 * @doi_free: free a CALIPSO DOI
212 * @doi_getdef: returns a reference to a DOI
213 * @doi_putdef: releases a reference of a DOI
214 * @doi_walk: enumerate the DOI list
215 * @sock_getattr: retrieve the socket's attr
216 * @sock_setattr: set the socket's attr
217 * @sock_delattr: remove the socket's attr
218 * @req_setattr: set the req socket's attr
219 * @req_delattr: remove the req socket's attr
220 * @opt_getattr: retrieve attr from memory block
221 * @skbuff_optptr: find option in packet
222 * @skbuff_setattr: set the skbuff's attr
223 * @skbuff_delattr: remove the skbuff's attr
224 * @cache_invalidate: invalidate cache
225 * @cache_add: add cache entry
226 *
227 * Description:
228 * This structure is filled out by the CALIPSO engine and passed
229 * to the NetLabel core via a call to netlbl_calipso_ops_register().
230 * It enables the CALIPSO engine (and hence IPv6) to be compiled
231 * as a module.
232 */
233struct netlbl_calipso_ops {
234 int (*doi_add)(struct calipso_doi *doi_def,
235 struct netlbl_audit *audit_info);
236 void (*doi_free)(struct calipso_doi *doi_def);
237 int (*doi_remove)(u32 doi, struct netlbl_audit *audit_info);
238 struct calipso_doi *(*doi_getdef)(u32 doi);
239 void (*doi_putdef)(struct calipso_doi *doi_def);
240 int (*doi_walk)(u32 *skip_cnt,
241 int (*callback)(struct calipso_doi *doi_def, void *arg),
242 void *cb_arg);
243 int (*sock_getattr)(struct sock *sk,
244 struct netlbl_lsm_secattr *secattr);
245 int (*sock_setattr)(struct sock *sk,
246 const struct calipso_doi *doi_def,
247 const struct netlbl_lsm_secattr *secattr);
248 void (*sock_delattr)(struct sock *sk);
249 int (*req_setattr)(struct request_sock *req,
250 const struct calipso_doi *doi_def,
251 const struct netlbl_lsm_secattr *secattr);
252 void (*req_delattr)(struct request_sock *req);
253 int (*opt_getattr)(const unsigned char *calipso,
254 struct netlbl_lsm_secattr *secattr);
255 unsigned char *(*skbuff_optptr)(const struct sk_buff *skb);
256 int (*skbuff_setattr)(struct sk_buff *skb,
257 const struct calipso_doi *doi_def,
258 const struct netlbl_lsm_secattr *secattr);
259 int (*skbuff_delattr)(struct sk_buff *skb);
260 void (*cache_invalidate)(void);
261 int (*cache_add)(const unsigned char *calipso_ptr,
262 const struct netlbl_lsm_secattr *secattr);
263};
264
265/*
266 * LSM security attribute operations (inline)
267 */
268
269/**
270 * netlbl_secattr_cache_alloc - Allocate and initialize a secattr cache
271 * @flags: the memory allocation flags
272 *
273 * Description:
274 * Allocate and initialize a netlbl_lsm_cache structure. Returns a pointer
275 * on success, NULL on failure.
276 *
277 */
278static inline struct netlbl_lsm_cache *netlbl_secattr_cache_alloc(gfp_t flags)
279{
280 struct netlbl_lsm_cache *cache;
281
282 cache = kzalloc(sizeof(*cache), flags);
283 if (cache)
284 refcount_set(&cache->refcount, 1);
285 return cache;
286}
287
288/**
289 * netlbl_secattr_cache_free - Frees a netlbl_lsm_cache struct
290 * @cache: the struct to free
291 *
292 * Description:
293 * Frees @secattr including all of the internal buffers.
294 *
295 */
296static inline void netlbl_secattr_cache_free(struct netlbl_lsm_cache *cache)
297{
298 if (!refcount_dec_and_test(&cache->refcount))
299 return;
300
301 if (cache->free)
302 cache->free(cache->data);
303 kfree(cache);
304}
305
306/**
307 * netlbl_catmap_alloc - Allocate a LSM secattr catmap
308 * @flags: memory allocation flags
309 *
310 * Description:
311 * Allocate memory for a LSM secattr catmap, returns a pointer on success, NULL
312 * on failure.
313 *
314 */
315static inline struct netlbl_lsm_catmap *netlbl_catmap_alloc(gfp_t flags)
316{
317 return kzalloc(sizeof(struct netlbl_lsm_catmap), flags);
318}
319
320/**
321 * netlbl_catmap_free - Free a LSM secattr catmap
322 * @catmap: the category bitmap
323 *
324 * Description:
325 * Free a LSM secattr catmap.
326 *
327 */
328static inline void netlbl_catmap_free(struct netlbl_lsm_catmap *catmap)
329{
330 struct netlbl_lsm_catmap *iter;
331
332 while (catmap) {
333 iter = catmap;
334 catmap = catmap->next;
335 kfree(iter);
336 }
337}
338
339/**
340 * netlbl_secattr_init - Initialize a netlbl_lsm_secattr struct
341 * @secattr: the struct to initialize
342 *
343 * Description:
344 * Initialize an already allocated netlbl_lsm_secattr struct.
345 *
346 */
347static inline void netlbl_secattr_init(struct netlbl_lsm_secattr *secattr)
348{
349 memset(secattr, 0, sizeof(*secattr));
350}
351
352/**
353 * netlbl_secattr_destroy - Clears a netlbl_lsm_secattr struct
354 * @secattr: the struct to clear
355 *
356 * Description:
357 * Destroys the @secattr struct, including freeing all of the internal buffers.
358 * The struct must be reset with a call to netlbl_secattr_init() before reuse.
359 *
360 */
361static inline void netlbl_secattr_destroy(struct netlbl_lsm_secattr *secattr)
362{
363 if (secattr->flags & NETLBL_SECATTR_FREE_DOMAIN)
364 kfree(secattr->domain);
365 if (secattr->flags & NETLBL_SECATTR_CACHE)
366 netlbl_secattr_cache_free(secattr->cache);
367 if (secattr->flags & NETLBL_SECATTR_MLS_CAT)
368 netlbl_catmap_free(secattr->attr.mls.cat);
369}
370
371/**
372 * netlbl_secattr_alloc - Allocate and initialize a netlbl_lsm_secattr struct
373 * @flags: the memory allocation flags
374 *
375 * Description:
376 * Allocate and initialize a netlbl_lsm_secattr struct. Returns a valid
377 * pointer on success, or NULL on failure.
378 *
379 */
380static inline struct netlbl_lsm_secattr *netlbl_secattr_alloc(gfp_t flags)
381{
382 return kzalloc(sizeof(struct netlbl_lsm_secattr), flags);
383}
384
385/**
386 * netlbl_secattr_free - Frees a netlbl_lsm_secattr struct
387 * @secattr: the struct to free
388 *
389 * Description:
390 * Frees @secattr including all of the internal buffers.
391 *
392 */
393static inline void netlbl_secattr_free(struct netlbl_lsm_secattr *secattr)
394{
395 netlbl_secattr_destroy(secattr);
396 kfree(secattr);
397}
398
399#ifdef CONFIG_NETLABEL
400/*
401 * LSM configuration operations
402 */
403int netlbl_cfg_map_del(const char *domain,
404 u16 family,
405 const void *addr,
406 const void *mask,
407 struct netlbl_audit *audit_info);
408int netlbl_cfg_unlbl_map_add(const char *domain,
409 u16 family,
410 const void *addr,
411 const void *mask,
412 struct netlbl_audit *audit_info);
413int netlbl_cfg_unlbl_static_add(struct net *net,
414 const char *dev_name,
415 const void *addr,
416 const void *mask,
417 u16 family,
418 u32 secid,
419 struct netlbl_audit *audit_info);
420int netlbl_cfg_unlbl_static_del(struct net *net,
421 const char *dev_name,
422 const void *addr,
423 const void *mask,
424 u16 family,
425 struct netlbl_audit *audit_info);
426int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
427 struct netlbl_audit *audit_info);
428void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info);
429int netlbl_cfg_cipsov4_map_add(u32 doi,
430 const char *domain,
431 const struct in_addr *addr,
432 const struct in_addr *mask,
433 struct netlbl_audit *audit_info);
434int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
435 struct netlbl_audit *audit_info);
436void netlbl_cfg_calipso_del(u32 doi, struct netlbl_audit *audit_info);
437int netlbl_cfg_calipso_map_add(u32 doi,
438 const char *domain,
439 const struct in6_addr *addr,
440 const struct in6_addr *mask,
441 struct netlbl_audit *audit_info);
442/*
443 * LSM security attribute operations
444 */
445int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap, u32 offset);
446int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap, u32 offset);
447int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
448 u32 *offset,
449 unsigned long *bitmap);
450int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
451 u32 bit,
452 gfp_t flags);
453int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
454 u32 start,
455 u32 end,
456 gfp_t flags);
457int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
458 u32 offset,
459 unsigned long bitmap,
460 gfp_t flags);
461
462/* Bitmap functions
463 */
464int netlbl_bitmap_walk(const unsigned char *bitmap, u32 bitmap_len,
465 u32 offset, u8 state);
466void netlbl_bitmap_setbit(unsigned char *bitmap, u32 bit, u8 state);
467
468/*
469 * LSM protocol operations (NetLabel LSM/kernel API)
470 */
471int netlbl_enabled(void);
472int netlbl_sock_setattr(struct sock *sk,
473 u16 family,
474 const struct netlbl_lsm_secattr *secattr);
475void netlbl_sock_delattr(struct sock *sk);
476int netlbl_sock_getattr(struct sock *sk,
477 struct netlbl_lsm_secattr *secattr);
478int netlbl_conn_setattr(struct sock *sk,
479 struct sockaddr *addr,
480 const struct netlbl_lsm_secattr *secattr);
481int netlbl_req_setattr(struct request_sock *req,
482 const struct netlbl_lsm_secattr *secattr);
483void netlbl_req_delattr(struct request_sock *req);
484int netlbl_skbuff_setattr(struct sk_buff *skb,
485 u16 family,
486 const struct netlbl_lsm_secattr *secattr);
487int netlbl_skbuff_getattr(const struct sk_buff *skb,
488 u16 family,
489 struct netlbl_lsm_secattr *secattr);
490void netlbl_skbuff_err(struct sk_buff *skb, u16 family, int error, int gateway);
491
492/*
493 * LSM label mapping cache operations
494 */
495void netlbl_cache_invalidate(void);
496int netlbl_cache_add(const struct sk_buff *skb, u16 family,
497 const struct netlbl_lsm_secattr *secattr);
498
499/*
500 * Protocol engine operations
501 */
502struct audit_buffer *netlbl_audit_start(int type,
503 struct netlbl_audit *audit_info);
504#else
505static inline int netlbl_cfg_map_del(const char *domain,
506 u16 family,
507 const void *addr,
508 const void *mask,
509 struct netlbl_audit *audit_info)
510{
511 return -ENOSYS;
512}
513static inline int netlbl_cfg_unlbl_map_add(const char *domain,
514 u16 family,
515 void *addr,
516 void *mask,
517 struct netlbl_audit *audit_info)
518{
519 return -ENOSYS;
520}
521static inline int netlbl_cfg_unlbl_static_add(struct net *net,
522 const char *dev_name,
523 const void *addr,
524 const void *mask,
525 u16 family,
526 u32 secid,
527 struct netlbl_audit *audit_info)
528{
529 return -ENOSYS;
530}
531static inline int netlbl_cfg_unlbl_static_del(struct net *net,
532 const char *dev_name,
533 const void *addr,
534 const void *mask,
535 u16 family,
536 struct netlbl_audit *audit_info)
537{
538 return -ENOSYS;
539}
540static inline int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
541 struct netlbl_audit *audit_info)
542{
543 return -ENOSYS;
544}
545static inline void netlbl_cfg_cipsov4_del(u32 doi,
546 struct netlbl_audit *audit_info)
547{
548 return;
549}
550static inline int netlbl_cfg_cipsov4_map_add(u32 doi,
551 const char *domain,
552 const struct in_addr *addr,
553 const struct in_addr *mask,
554 struct netlbl_audit *audit_info)
555{
556 return -ENOSYS;
557}
558static inline int netlbl_cfg_calipso_add(struct calipso_doi *doi_def,
559 struct netlbl_audit *audit_info)
560{
561 return -ENOSYS;
562}
563static inline void netlbl_cfg_calipso_del(u32 doi,
564 struct netlbl_audit *audit_info)
565{
566 return;
567}
568static inline int netlbl_cfg_calipso_map_add(u32 doi,
569 const char *domain,
570 const struct in6_addr *addr,
571 const struct in6_addr *mask,
572 struct netlbl_audit *audit_info)
573{
574 return -ENOSYS;
575}
576static inline int netlbl_catmap_walk(struct netlbl_lsm_catmap *catmap,
577 u32 offset)
578{
579 return -ENOENT;
580}
581static inline int netlbl_catmap_walkrng(struct netlbl_lsm_catmap *catmap,
582 u32 offset)
583{
584 return -ENOENT;
585}
586static inline int netlbl_catmap_getlong(struct netlbl_lsm_catmap *catmap,
587 u32 *offset,
588 unsigned long *bitmap)
589{
590 return 0;
591}
592static inline int netlbl_catmap_setbit(struct netlbl_lsm_catmap **catmap,
593 u32 bit,
594 gfp_t flags)
595{
596 return 0;
597}
598static inline int netlbl_catmap_setrng(struct netlbl_lsm_catmap **catmap,
599 u32 start,
600 u32 end,
601 gfp_t flags)
602{
603 return 0;
604}
605static inline int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
606 u32 offset,
607 unsigned long bitmap,
608 gfp_t flags)
609{
610 return 0;
611}
612static inline int netlbl_enabled(void)
613{
614 return 0;
615}
616static inline int netlbl_sock_setattr(struct sock *sk,
617 u16 family,
618 const struct netlbl_lsm_secattr *secattr)
619{
620 return -ENOSYS;
621}
622static inline void netlbl_sock_delattr(struct sock *sk)
623{
624}
625static inline int netlbl_sock_getattr(struct sock *sk,
626 struct netlbl_lsm_secattr *secattr)
627{
628 return -ENOSYS;
629}
630static inline int netlbl_conn_setattr(struct sock *sk,
631 struct sockaddr *addr,
632 const struct netlbl_lsm_secattr *secattr)
633{
634 return -ENOSYS;
635}
636static inline int netlbl_req_setattr(struct request_sock *req,
637 const struct netlbl_lsm_secattr *secattr)
638{
639 return -ENOSYS;
640}
641static inline void netlbl_req_delattr(struct request_sock *req)
642{
643 return;
644}
645static inline int netlbl_skbuff_setattr(struct sk_buff *skb,
646 u16 family,
647 const struct netlbl_lsm_secattr *secattr)
648{
649 return -ENOSYS;
650}
651static inline int netlbl_skbuff_getattr(const struct sk_buff *skb,
652 u16 family,
653 struct netlbl_lsm_secattr *secattr)
654{
655 return -ENOSYS;
656}
657static inline void netlbl_skbuff_err(struct sk_buff *skb,
658 int error,
659 int gateway)
660{
661 return;
662}
663static inline void netlbl_cache_invalidate(void)
664{
665 return;
666}
667static inline int netlbl_cache_add(const struct sk_buff *skb, u16 family,
668 const struct netlbl_lsm_secattr *secattr)
669{
670 return 0;
671}
672static inline struct audit_buffer *netlbl_audit_start(int type,
673 struct netlbl_audit *audit_info)
674{
675 return NULL;
676}
677#endif /* CONFIG_NETLABEL */
678
679const struct netlbl_calipso_ops *
680netlbl_calipso_ops_register(const struct netlbl_calipso_ops *ops);
681
682#endif /* _NETLABEL_H */