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
8 * Author: Paul Moore <paul@paul-moore.com>
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
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.
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.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, see <http://www.gnu.org/licenses/>.
30 #include <linux/init.h>
31 #include <linux/types.h>
32 #include <linux/slab.h>
33 #include <linux/audit.h>
35 #include <linux/in6.h>
38 #include <net/netlabel.h>
39 #include <net/cipso_ipv4.h>
41 #include <linux/atomic.h>
43 #include "netlabel_domainhash.h"
44 #include "netlabel_unlabeled.h"
45 #include "netlabel_cipso_v4.h"
46 #include "netlabel_user.h"
47 #include "netlabel_mgmt.h"
48 #include "netlabel_addrlist.h"
51 * Configuration Functions
55 * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
56 * @domain: the domain mapping to remove
57 * @family: address family
59 * @mask: IP address mask
60 * @audit_info: NetLabel audit information
63 * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the
64 * default domain mapping to be removed. Returns zero on success, negative
68 int netlbl_cfg_map_del(const char *domain
,
72 struct netlbl_audit
*audit_info
)
74 if (addr
== NULL
&& mask
== NULL
) {
75 return netlbl_domhsh_remove(domain
, audit_info
);
76 } else if (addr
!= NULL
&& mask
!= NULL
) {
79 return netlbl_domhsh_remove_af4(domain
, addr
, mask
,
89 * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
90 * @domain: the domain mapping to add
91 * @family: address family
93 * @mask: IP address mask
94 * @audit_info: NetLabel audit information
97 * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL
98 * causes a new default domain mapping to be added. Returns zero on success,
99 * negative values on failure.
102 int netlbl_cfg_unlbl_map_add(const char *domain
,
106 struct netlbl_audit
*audit_info
)
108 int ret_val
= -ENOMEM
;
109 struct netlbl_dom_map
*entry
;
110 struct netlbl_domaddr_map
*addrmap
= NULL
;
111 struct netlbl_domaddr4_map
*map4
= NULL
;
112 struct netlbl_domaddr6_map
*map6
= NULL
;
114 entry
= kzalloc(sizeof(*entry
), GFP_ATOMIC
);
117 if (domain
!= NULL
) {
118 entry
->domain
= kstrdup(domain
, GFP_ATOMIC
);
119 if (entry
->domain
== NULL
)
120 goto cfg_unlbl_map_add_failure
;
123 if (addr
== NULL
&& mask
== NULL
)
124 entry
->def
.type
= NETLBL_NLTYPE_UNLABELED
;
125 else if (addr
!= NULL
&& mask
!= NULL
) {
126 addrmap
= kzalloc(sizeof(*addrmap
), GFP_ATOMIC
);
128 goto cfg_unlbl_map_add_failure
;
129 INIT_LIST_HEAD(&addrmap
->list4
);
130 INIT_LIST_HEAD(&addrmap
->list6
);
134 const struct in_addr
*addr4
= addr
;
135 const struct in_addr
*mask4
= mask
;
136 map4
= kzalloc(sizeof(*map4
), GFP_ATOMIC
);
138 goto cfg_unlbl_map_add_failure
;
139 map4
->def
.type
= NETLBL_NLTYPE_UNLABELED
;
140 map4
->list
.addr
= addr4
->s_addr
& mask4
->s_addr
;
141 map4
->list
.mask
= mask4
->s_addr
;
142 map4
->list
.valid
= 1;
143 ret_val
= netlbl_af4list_add(&map4
->list
,
146 goto cfg_unlbl_map_add_failure
;
149 #if IS_ENABLED(CONFIG_IPV6)
151 const struct in6_addr
*addr6
= addr
;
152 const struct in6_addr
*mask6
= mask
;
153 map6
= kzalloc(sizeof(*map6
), GFP_ATOMIC
);
155 goto cfg_unlbl_map_add_failure
;
156 map6
->def
.type
= NETLBL_NLTYPE_UNLABELED
;
157 map6
->list
.addr
= *addr6
;
158 map6
->list
.addr
.s6_addr32
[0] &= mask6
->s6_addr32
[0];
159 map6
->list
.addr
.s6_addr32
[1] &= mask6
->s6_addr32
[1];
160 map6
->list
.addr
.s6_addr32
[2] &= mask6
->s6_addr32
[2];
161 map6
->list
.addr
.s6_addr32
[3] &= mask6
->s6_addr32
[3];
162 map6
->list
.mask
= *mask6
;
163 map6
->list
.valid
= 1;
164 ret_val
= netlbl_af6list_add(&map6
->list
,
167 goto cfg_unlbl_map_add_failure
;
172 goto cfg_unlbl_map_add_failure
;
175 entry
->def
.addrsel
= addrmap
;
176 entry
->def
.type
= NETLBL_NLTYPE_ADDRSELECT
;
179 goto cfg_unlbl_map_add_failure
;
182 ret_val
= netlbl_domhsh_add(entry
, audit_info
);
184 goto cfg_unlbl_map_add_failure
;
188 cfg_unlbl_map_add_failure
:
189 kfree(entry
->domain
);
199 * netlbl_cfg_unlbl_static_add - Adds a new static label
200 * @net: network namespace
201 * @dev_name: interface name
202 * @addr: IP address in network byte order (struct in[6]_addr)
203 * @mask: address mask in network byte order (struct in[6]_addr)
204 * @family: address family
205 * @secid: LSM secid value for the entry
206 * @audit_info: NetLabel audit information
209 * Adds a new NetLabel static label to be used when protocol provided labels
210 * are not present on incoming traffic. If @dev_name is NULL then the default
211 * interface will be used. Returns zero on success, negative values on failure.
214 int netlbl_cfg_unlbl_static_add(struct net
*net
,
215 const char *dev_name
,
220 struct netlbl_audit
*audit_info
)
226 addr_len
= sizeof(struct in_addr
);
228 #if IS_ENABLED(CONFIG_IPV6)
230 addr_len
= sizeof(struct in6_addr
);
234 return -EPFNOSUPPORT
;
237 return netlbl_unlhsh_add(net
,
238 dev_name
, addr
, mask
, addr_len
,
243 * netlbl_cfg_unlbl_static_del - Removes an existing static label
244 * @net: network namespace
245 * @dev_name: interface name
246 * @addr: IP address in network byte order (struct in[6]_addr)
247 * @mask: address mask in network byte order (struct in[6]_addr)
248 * @family: address family
249 * @audit_info: NetLabel audit information
252 * Removes an existing NetLabel static label used when protocol provided labels
253 * are not present on incoming traffic. If @dev_name is NULL then the default
254 * interface will be used. Returns zero on success, negative values on failure.
257 int netlbl_cfg_unlbl_static_del(struct net
*net
,
258 const char *dev_name
,
262 struct netlbl_audit
*audit_info
)
268 addr_len
= sizeof(struct in_addr
);
270 #if IS_ENABLED(CONFIG_IPV6)
272 addr_len
= sizeof(struct in6_addr
);
276 return -EPFNOSUPPORT
;
279 return netlbl_unlhsh_remove(net
,
280 dev_name
, addr
, mask
, addr_len
,
285 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
286 * @doi_def: CIPSO DOI definition
287 * @audit_info: NetLabel audit information
290 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
291 * success and negative values on failure.
294 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi
*doi_def
,
295 struct netlbl_audit
*audit_info
)
297 return cipso_v4_doi_add(doi_def
, audit_info
);
301 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
303 * @audit_info: NetLabel audit information
306 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
307 * success and negative values on failure.
310 void netlbl_cfg_cipsov4_del(u32 doi
, struct netlbl_audit
*audit_info
)
312 cipso_v4_doi_remove(doi
, audit_info
);
316 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
317 * @doi: the CIPSO DOI
318 * @domain: the domain mapping to add
320 * @mask: IP address mask
321 * @audit_info: NetLabel audit information
324 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
325 * subsystem. A @domain value of NULL adds a new default domain mapping.
326 * Returns zero on success, negative values on failure.
329 int netlbl_cfg_cipsov4_map_add(u32 doi
,
331 const struct in_addr
*addr
,
332 const struct in_addr
*mask
,
333 struct netlbl_audit
*audit_info
)
335 int ret_val
= -ENOMEM
;
336 struct cipso_v4_doi
*doi_def
;
337 struct netlbl_dom_map
*entry
;
338 struct netlbl_domaddr_map
*addrmap
= NULL
;
339 struct netlbl_domaddr4_map
*addrinfo
= NULL
;
341 doi_def
= cipso_v4_doi_getdef(doi
);
345 entry
= kzalloc(sizeof(*entry
), GFP_ATOMIC
);
348 if (domain
!= NULL
) {
349 entry
->domain
= kstrdup(domain
, GFP_ATOMIC
);
350 if (entry
->domain
== NULL
)
354 if (addr
== NULL
&& mask
== NULL
) {
355 entry
->def
.cipso
= doi_def
;
356 entry
->def
.type
= NETLBL_NLTYPE_CIPSOV4
;
357 } else if (addr
!= NULL
&& mask
!= NULL
) {
358 addrmap
= kzalloc(sizeof(*addrmap
), GFP_ATOMIC
);
361 INIT_LIST_HEAD(&addrmap
->list4
);
362 INIT_LIST_HEAD(&addrmap
->list6
);
364 addrinfo
= kzalloc(sizeof(*addrinfo
), GFP_ATOMIC
);
365 if (addrinfo
== NULL
)
367 addrinfo
->def
.cipso
= doi_def
;
368 addrinfo
->def
.type
= NETLBL_NLTYPE_CIPSOV4
;
369 addrinfo
->list
.addr
= addr
->s_addr
& mask
->s_addr
;
370 addrinfo
->list
.mask
= mask
->s_addr
;
371 addrinfo
->list
.valid
= 1;
372 ret_val
= netlbl_af4list_add(&addrinfo
->list
, &addrmap
->list4
);
374 goto cfg_cipsov4_map_add_failure
;
376 entry
->def
.addrsel
= addrmap
;
377 entry
->def
.type
= NETLBL_NLTYPE_ADDRSELECT
;
383 ret_val
= netlbl_domhsh_add(entry
, audit_info
);
385 goto cfg_cipsov4_map_add_failure
;
389 cfg_cipsov4_map_add_failure
:
394 kfree(entry
->domain
);
398 cipso_v4_doi_putdef(doi_def
);
403 * Security Attribute Functions
406 #define _CM_F_NONE 0x00000000
407 #define _CM_F_ALLOC 0x00000001
408 #define _CM_F_WALK 0x00000002
411 * _netlbl_catmap_getnode - Get a individual node from a catmap
412 * @catmap: pointer to the category bitmap
413 * @offset: the requested offset
414 * @cm_flags: catmap flags, see _CM_F_*
415 * @gfp_flags: memory allocation flags
418 * Iterate through the catmap looking for the node associated with @offset.
419 * If the _CM_F_ALLOC flag is set in @cm_flags and there is no associated node,
420 * one will be created and inserted into the catmap. If the _CM_F_WALK flag is
421 * set in @cm_flags and there is no associated node, the next highest node will
422 * be returned. Returns a pointer to the node on success, NULL on failure.
425 static struct netlbl_lsm_catmap
*_netlbl_catmap_getnode(
426 struct netlbl_lsm_catmap
**catmap
,
428 unsigned int cm_flags
,
431 struct netlbl_lsm_catmap
*iter
= *catmap
;
432 struct netlbl_lsm_catmap
*prev
= NULL
;
435 goto catmap_getnode_alloc
;
436 if (offset
< iter
->startbit
)
437 goto catmap_getnode_walk
;
438 while (iter
&& offset
>= (iter
->startbit
+ NETLBL_CATMAP_SIZE
)) {
442 if (iter
== NULL
|| offset
< iter
->startbit
)
443 goto catmap_getnode_walk
;
448 if (cm_flags
& _CM_F_WALK
)
450 catmap_getnode_alloc
:
451 if (!(cm_flags
& _CM_F_ALLOC
))
454 iter
= netlbl_catmap_alloc(gfp_flags
);
457 iter
->startbit
= offset
& ~(NETLBL_CATMAP_SIZE
- 1);
460 iter
->next
= *catmap
;
463 iter
->next
= prev
->next
;
471 * netlbl_catmap_walk - Walk a LSM secattr catmap looking for a bit
472 * @catmap: the category bitmap
473 * @offset: the offset to start searching at, in bits
476 * This function walks a LSM secattr category bitmap starting at @offset and
477 * returns the spot of the first set bit or -ENOENT if no bits are set.
480 int netlbl_catmap_walk(struct netlbl_lsm_catmap
*catmap
, u32 offset
)
482 struct netlbl_lsm_catmap
*iter
= catmap
;
485 NETLBL_CATMAP_MAPTYPE bitmap
;
487 iter
= _netlbl_catmap_getnode(&catmap
, offset
, _CM_F_WALK
, 0);
490 if (offset
> iter
->startbit
) {
491 offset
-= iter
->startbit
;
492 idx
= offset
/ NETLBL_CATMAP_MAPSIZE
;
493 bit
= offset
% NETLBL_CATMAP_MAPSIZE
;
498 bitmap
= iter
->bitmap
[idx
] >> bit
;
502 while ((bitmap
& NETLBL_CATMAP_BIT
) == 0) {
506 return iter
->startbit
+
507 (NETLBL_CATMAP_MAPSIZE
* idx
) + bit
;
509 if (++idx
>= NETLBL_CATMAP_MAPCNT
) {
510 if (iter
->next
!= NULL
) {
516 bitmap
= iter
->bitmap
[idx
];
524 * netlbl_catmap_walkrng - Find the end of a string of set bits
525 * @catmap: the category bitmap
526 * @offset: the offset to start searching at, in bits
529 * This function walks a LSM secattr category bitmap starting at @offset and
530 * returns the spot of the first cleared bit or -ENOENT if the offset is past
531 * the end of the bitmap.
534 int netlbl_catmap_walkrng(struct netlbl_lsm_catmap
*catmap
, u32 offset
)
536 struct netlbl_lsm_catmap
*iter
;
537 struct netlbl_lsm_catmap
*prev
= NULL
;
540 NETLBL_CATMAP_MAPTYPE bitmask
;
541 NETLBL_CATMAP_MAPTYPE bitmap
;
543 iter
= _netlbl_catmap_getnode(&catmap
, offset
, _CM_F_WALK
, 0);
546 if (offset
> iter
->startbit
) {
547 offset
-= iter
->startbit
;
548 idx
= offset
/ NETLBL_CATMAP_MAPSIZE
;
549 bit
= offset
% NETLBL_CATMAP_MAPSIZE
;
554 bitmask
= NETLBL_CATMAP_BIT
<< bit
;
557 bitmap
= iter
->bitmap
[idx
];
558 while (bitmask
!= 0 && (bitmap
& bitmask
) != 0) {
563 if (prev
&& idx
== 0 && bit
== 0)
564 return prev
->startbit
+ NETLBL_CATMAP_SIZE
- 1;
565 else if (bitmask
!= 0)
566 return iter
->startbit
+
567 (NETLBL_CATMAP_MAPSIZE
* idx
) + bit
- 1;
568 else if (++idx
>= NETLBL_CATMAP_MAPCNT
) {
569 if (iter
->next
== NULL
)
570 return iter
->startbit
+ NETLBL_CATMAP_SIZE
- 1;
575 bitmask
= NETLBL_CATMAP_BIT
;
583 * netlbl_catmap_getlong - Export an unsigned long bitmap
584 * @catmap: pointer to the category bitmap
585 * @offset: pointer to the requested offset
586 * @bitmap: the exported bitmap
589 * Export a bitmap with an offset greater than or equal to @offset and return
590 * it in @bitmap. The @offset must be aligned to an unsigned long and will be
591 * updated on return if different from what was requested; if the catmap is
592 * empty at the requested offset and beyond, the @offset is set to (u32)-1.
593 * Returns zero on sucess, negative values on failure.
596 int netlbl_catmap_getlong(struct netlbl_lsm_catmap
*catmap
,
598 unsigned long *bitmap
)
600 struct netlbl_lsm_catmap
*iter
;
604 /* only allow aligned offsets */
605 if ((off
& (BITS_PER_LONG
- 1)) != 0)
608 if (off
< catmap
->startbit
) {
609 off
= catmap
->startbit
;
612 iter
= _netlbl_catmap_getnode(&catmap
, off
, _CM_F_WALK
, 0);
618 if (off
< iter
->startbit
) {
619 *offset
= iter
->startbit
;
622 off
-= iter
->startbit
;
623 idx
= off
/ NETLBL_CATMAP_MAPSIZE
;
624 *bitmap
= iter
->bitmap
[idx
] >> (off
% NETLBL_CATMAP_MAPSIZE
);
630 * netlbl_catmap_setbit - Set a bit in a LSM secattr catmap
631 * @catmap: pointer to the category bitmap
632 * @bit: the bit to set
633 * @flags: memory allocation flags
636 * Set the bit specified by @bit in @catmap. Returns zero on success,
637 * negative values on failure.
640 int netlbl_catmap_setbit(struct netlbl_lsm_catmap
**catmap
,
644 struct netlbl_lsm_catmap
*iter
;
647 iter
= _netlbl_catmap_getnode(catmap
, bit
, _CM_F_ALLOC
, flags
);
651 bit
-= iter
->startbit
;
652 idx
= bit
/ NETLBL_CATMAP_MAPSIZE
;
653 iter
->bitmap
[idx
] |= NETLBL_CATMAP_BIT
<< (bit
% NETLBL_CATMAP_MAPSIZE
);
659 * netlbl_catmap_setrng - Set a range of bits in a LSM secattr catmap
660 * @catmap: pointer to the category bitmap
661 * @start: the starting bit
662 * @end: the last bit in the string
663 * @flags: memory allocation flags
666 * Set a range of bits, starting at @start and ending with @end. Returns zero
667 * on success, negative values on failure.
670 int netlbl_catmap_setrng(struct netlbl_lsm_catmap
**catmap
,
678 while (rc
== 0 && spot
<= end
) {
679 if (((spot
& (BITS_PER_LONG
- 1)) == 0) &&
680 ((end
- spot
) > BITS_PER_LONG
)) {
681 rc
= netlbl_catmap_setlong(catmap
,
685 spot
+= BITS_PER_LONG
;
687 rc
= netlbl_catmap_setbit(catmap
, spot
++, flags
);
694 * netlbl_catmap_setlong - Import an unsigned long bitmap
695 * @catmap: pointer to the category bitmap
696 * @offset: offset to the start of the imported bitmap
697 * @bitmap: the bitmap to import
698 * @flags: memory allocation flags
701 * Import the bitmap specified in @bitmap into @catmap, using the offset
702 * in @offset. The offset must be aligned to an unsigned long. Returns zero
703 * on success, negative values on failure.
706 int netlbl_catmap_setlong(struct netlbl_lsm_catmap
**catmap
,
708 unsigned long bitmap
,
711 struct netlbl_lsm_catmap
*iter
;
714 /* only allow aligned offsets */
715 if ((offset
& (BITS_PER_LONG
- 1)) != 0)
718 iter
= _netlbl_catmap_getnode(catmap
, offset
, _CM_F_ALLOC
, flags
);
722 offset
-= iter
->startbit
;
723 idx
= offset
/ NETLBL_CATMAP_MAPSIZE
;
724 iter
->bitmap
[idx
] |= bitmap
<< (offset
% NETLBL_CATMAP_MAPSIZE
);
734 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
737 * The LSM can use this function to determine if it should use NetLabel
738 * security attributes in it's enforcement mechanism. Currently, NetLabel is
739 * considered to be enabled when it's configuration contains a valid setup for
740 * at least one labeled protocol (i.e. NetLabel can understand incoming
741 * labeled packets of at least one type); otherwise NetLabel is considered to
745 int netlbl_enabled(void)
747 /* At some point we probably want to expose this mechanism to the user
748 * as well so that admins can toggle NetLabel regardless of the
750 return (atomic_read(&netlabel_mgmt_protocount
) > 0);
754 * netlbl_sock_setattr - Label a socket using the correct protocol
755 * @sk: the socket to label
756 * @family: protocol family
757 * @secattr: the security attributes
760 * Attach the correct label to the given socket using the security attributes
761 * specified in @secattr. This function requires exclusive access to @sk,
762 * which means it either needs to be in the process of being created or locked.
763 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
764 * network address selectors (can't blindly label the socket), and negative
765 * values on all other failures.
768 int netlbl_sock_setattr(struct sock
*sk
,
770 const struct netlbl_lsm_secattr
*secattr
)
773 struct netlbl_dom_map
*dom_entry
;
776 dom_entry
= netlbl_domhsh_getentry(secattr
->domain
);
777 if (dom_entry
== NULL
) {
779 goto socket_setattr_return
;
783 switch (dom_entry
->def
.type
) {
784 case NETLBL_NLTYPE_ADDRSELECT
:
785 ret_val
= -EDESTADDRREQ
;
787 case NETLBL_NLTYPE_CIPSOV4
:
788 ret_val
= cipso_v4_sock_setattr(sk
,
789 dom_entry
->def
.cipso
,
792 case NETLBL_NLTYPE_UNLABELED
:
799 #if IS_ENABLED(CONFIG_IPV6)
801 /* since we don't support any IPv6 labeling protocols right
802 * now we can optimize everything away until we do */
807 ret_val
= -EPROTONOSUPPORT
;
810 socket_setattr_return
:
816 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
820 * Remove all the NetLabel labeling from @sk. The caller is responsible for
821 * ensuring that @sk is locked.
824 void netlbl_sock_delattr(struct sock
*sk
)
826 switch (sk
->sk_family
) {
828 cipso_v4_sock_delattr(sk
);
834 * netlbl_sock_getattr - Determine the security attributes of a sock
836 * @secattr: the security attributes
839 * Examines the given sock to see if any NetLabel style labeling has been
840 * applied to the sock, if so it parses the socket label and returns the
841 * security attributes in @secattr. Returns zero on success, negative values
845 int netlbl_sock_getattr(struct sock
*sk
,
846 struct netlbl_lsm_secattr
*secattr
)
850 switch (sk
->sk_family
) {
852 ret_val
= cipso_v4_sock_getattr(sk
, secattr
);
854 #if IS_ENABLED(CONFIG_IPV6)
860 ret_val
= -EPROTONOSUPPORT
;
867 * netlbl_conn_setattr - Label a connected socket using the correct protocol
868 * @sk: the socket to label
869 * @addr: the destination address
870 * @secattr: the security attributes
873 * Attach the correct label to the given connected socket using the security
874 * attributes specified in @secattr. The caller is responsible for ensuring
875 * that @sk is locked. Returns zero on success, negative values on failure.
878 int netlbl_conn_setattr(struct sock
*sk
,
879 struct sockaddr
*addr
,
880 const struct netlbl_lsm_secattr
*secattr
)
883 struct sockaddr_in
*addr4
;
884 struct netlbl_dommap_def
*entry
;
887 switch (addr
->sa_family
) {
889 addr4
= (struct sockaddr_in
*)addr
;
890 entry
= netlbl_domhsh_getentry_af4(secattr
->domain
,
891 addr4
->sin_addr
.s_addr
);
894 goto conn_setattr_return
;
896 switch (entry
->type
) {
897 case NETLBL_NLTYPE_CIPSOV4
:
898 ret_val
= cipso_v4_sock_setattr(sk
,
899 entry
->cipso
, secattr
);
901 case NETLBL_NLTYPE_UNLABELED
:
902 /* just delete the protocols we support for right now
903 * but we could remove other protocols if needed */
904 cipso_v4_sock_delattr(sk
);
911 #if IS_ENABLED(CONFIG_IPV6)
913 /* since we don't support any IPv6 labeling protocols right
914 * now we can optimize everything away until we do */
919 ret_val
= -EPROTONOSUPPORT
;
928 * netlbl_req_setattr - Label a request socket using the correct protocol
929 * @req: the request socket to label
930 * @secattr: the security attributes
933 * Attach the correct label to the given socket using the security attributes
934 * specified in @secattr. Returns zero on success, negative values on failure.
937 int netlbl_req_setattr(struct request_sock
*req
,
938 const struct netlbl_lsm_secattr
*secattr
)
941 struct netlbl_dommap_def
*entry
;
944 switch (req
->rsk_ops
->family
) {
946 entry
= netlbl_domhsh_getentry_af4(secattr
->domain
,
947 inet_rsk(req
)->ir_rmt_addr
);
950 goto req_setattr_return
;
952 switch (entry
->type
) {
953 case NETLBL_NLTYPE_CIPSOV4
:
954 ret_val
= cipso_v4_req_setattr(req
,
955 entry
->cipso
, secattr
);
957 case NETLBL_NLTYPE_UNLABELED
:
958 /* just delete the protocols we support for right now
959 * but we could remove other protocols if needed */
960 cipso_v4_req_delattr(req
);
967 #if IS_ENABLED(CONFIG_IPV6)
969 /* since we don't support any IPv6 labeling protocols right
970 * now we can optimize everything away until we do */
975 ret_val
= -EPROTONOSUPPORT
;
984 * netlbl_req_delattr - Delete all the NetLabel labels on a socket
988 * Remove all the NetLabel labeling from @req.
991 void netlbl_req_delattr(struct request_sock
*req
)
993 switch (req
->rsk_ops
->family
) {
995 cipso_v4_req_delattr(req
);
1001 * netlbl_skbuff_setattr - Label a packet using the correct protocol
1003 * @family: protocol family
1004 * @secattr: the security attributes
1007 * Attach the correct label to the given packet using the security attributes
1008 * specified in @secattr. Returns zero on success, negative values on failure.
1011 int netlbl_skbuff_setattr(struct sk_buff
*skb
,
1013 const struct netlbl_lsm_secattr
*secattr
)
1017 struct netlbl_dommap_def
*entry
;
1023 entry
= netlbl_domhsh_getentry_af4(secattr
->domain
,hdr4
->daddr
);
1024 if (entry
== NULL
) {
1026 goto skbuff_setattr_return
;
1028 switch (entry
->type
) {
1029 case NETLBL_NLTYPE_CIPSOV4
:
1030 ret_val
= cipso_v4_skbuff_setattr(skb
, entry
->cipso
,
1033 case NETLBL_NLTYPE_UNLABELED
:
1034 /* just delete the protocols we support for right now
1035 * but we could remove other protocols if needed */
1036 ret_val
= cipso_v4_skbuff_delattr(skb
);
1042 #if IS_ENABLED(CONFIG_IPV6)
1044 /* since we don't support any IPv6 labeling protocols right
1045 * now we can optimize everything away until we do */
1050 ret_val
= -EPROTONOSUPPORT
;
1053 skbuff_setattr_return
:
1059 * netlbl_skbuff_getattr - Determine the security attributes of a packet
1061 * @family: protocol family
1062 * @secattr: the security attributes
1065 * Examines the given packet to see if a recognized form of packet labeling
1066 * is present, if so it parses the packet label and returns the security
1067 * attributes in @secattr. Returns zero on success, negative values on
1071 int netlbl_skbuff_getattr(const struct sk_buff
*skb
,
1073 struct netlbl_lsm_secattr
*secattr
)
1079 ptr
= cipso_v4_optptr(skb
);
1080 if (ptr
&& cipso_v4_getattr(ptr
, secattr
) == 0)
1083 #if IS_ENABLED(CONFIG_IPV6)
1089 return netlbl_unlabel_getattr(skb
, family
, secattr
);
1093 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
1095 * @error: the error code
1096 * @gateway: true if host is acting as a gateway, false otherwise
1099 * Deal with a LSM problem when handling the packet in @skb, typically this is
1100 * a permission denied problem (-EACCES). The correct action is determined
1101 * according to the packet's labeling protocol.
1104 void netlbl_skbuff_err(struct sk_buff
*skb
, int error
, int gateway
)
1106 if (cipso_v4_optptr(skb
))
1107 cipso_v4_error(skb
, error
, gateway
);
1111 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
1114 * For all of the NetLabel protocols that support some form of label mapping
1115 * cache, invalidate the cache. Returns zero on success, negative values on
1119 void netlbl_cache_invalidate(void)
1121 cipso_v4_cache_invalidate();
1125 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
1127 * @secattr: the packet's security attributes
1130 * Add the LSM security attributes for the given packet to the underlying
1131 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1135 int netlbl_cache_add(const struct sk_buff
*skb
,
1136 const struct netlbl_lsm_secattr
*secattr
)
1140 if ((secattr
->flags
& NETLBL_SECATTR_CACHE
) == 0)
1143 ptr
= cipso_v4_optptr(skb
);
1145 return cipso_v4_cache_add(ptr
, secattr
);
1151 * Protocol Engine Functions
1155 * netlbl_audit_start - Start an audit message
1156 * @type: audit message type
1157 * @audit_info: NetLabel audit information
1160 * Start an audit message using the type specified in @type and fill the audit
1161 * message with some fields common to all NetLabel audit messages. This
1162 * function should only be used by protocol engines, not LSMs. Returns a
1163 * pointer to the audit buffer on success, NULL on failure.
1166 struct audit_buffer
*netlbl_audit_start(int type
,
1167 struct netlbl_audit
*audit_info
)
1169 return netlbl_audit_start_common(type
, audit_info
);
1177 * netlbl_init - Initialize NetLabel
1180 * Perform the required NetLabel initialization before first use.
1183 static int __init
netlbl_init(void)
1187 printk(KERN_INFO
"NetLabel: Initializing\n");
1188 printk(KERN_INFO
"NetLabel: domain hash size = %u\n",
1189 (1 << NETLBL_DOMHSH_BITSIZE
));
1190 printk(KERN_INFO
"NetLabel: protocols ="
1195 ret_val
= netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE
);
1199 ret_val
= netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE
);
1203 ret_val
= netlbl_netlink_init();
1207 ret_val
= netlbl_unlabel_defconf();
1210 printk(KERN_INFO
"NetLabel: unlabeled traffic allowed by default\n");
1215 panic("NetLabel: failed to initialize properly (%d)\n", ret_val
);
1218 subsys_initcall(netlbl_init
);