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.moore@hp.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, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/audit.h>
35 #include <linux/in6.h>
38 #include <net/netlabel.h>
39 #include <net/cipso_ipv4.h>
41 #include <asm/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;
113 const struct in_addr *addr4, *mask4;
114 const struct in6_addr *addr6, *mask6;
116 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
119 if (domain != NULL) {
120 entry->domain = kstrdup(domain, GFP_ATOMIC);
121 if (entry->domain == NULL)
122 goto cfg_unlbl_map_add_failure;
125 if (addr == NULL && mask == NULL)
126 entry->type = NETLBL_NLTYPE_UNLABELED;
127 else if (addr != NULL && mask != NULL) {
128 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
130 goto cfg_unlbl_map_add_failure;
131 INIT_LIST_HEAD(&addrmap->list4);
132 INIT_LIST_HEAD(&addrmap->list6);
138 map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
140 goto cfg_unlbl_map_add_failure;
141 map4->type = NETLBL_NLTYPE_UNLABELED;
142 map4->list.addr = addr4->s_addr & mask4->s_addr;
143 map4->list.mask = mask4->s_addr;
144 map4->list.valid = 1;
145 ret_val = netlbl_af4list_add(&map4->list,
148 goto cfg_unlbl_map_add_failure;
153 map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
155 goto cfg_unlbl_map_add_failure;
156 map6->type = NETLBL_NLTYPE_UNLABELED;
157 ipv6_addr_copy(&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 ipv6_addr_copy(&map6->list.mask, mask6);
163 map6->list.valid = 1;
164 ret_val = netlbl_af4list_add(&map4->list,
167 goto cfg_unlbl_map_add_failure;
170 goto cfg_unlbl_map_add_failure;
174 entry->type_def.addrsel = addrmap;
175 entry->type = NETLBL_NLTYPE_ADDRSELECT;
178 goto cfg_unlbl_map_add_failure;
181 ret_val = netlbl_domhsh_add(entry, audit_info);
183 goto cfg_unlbl_map_add_failure;
187 cfg_unlbl_map_add_failure:
188 kfree(entry->domain);
198 * netlbl_cfg_unlbl_static_add - Adds a new static label
199 * @net: network namespace
200 * @dev_name: interface name
201 * @addr: IP address in network byte order (struct in[6]_addr)
202 * @mask: address mask in network byte order (struct in[6]_addr)
203 * @family: address family
204 * @secid: LSM secid value for the entry
205 * @audit_info: NetLabel audit information
208 * Adds a new NetLabel static label to be used when protocol provided labels
209 * are not present on incoming traffic. If @dev_name is NULL then the default
210 * interface will be used. Returns zero on success, negative values on failure.
213 int netlbl_cfg_unlbl_static_add(struct net *net,
214 const char *dev_name,
219 struct netlbl_audit *audit_info)
225 addr_len = sizeof(struct in_addr);
228 addr_len = sizeof(struct in6_addr);
231 return -EPFNOSUPPORT;
234 return netlbl_unlhsh_add(net,
235 dev_name, addr, mask, addr_len,
240 * netlbl_cfg_unlbl_static_del - Removes an existing static label
241 * @net: network namespace
242 * @dev_name: interface name
243 * @addr: IP address in network byte order (struct in[6]_addr)
244 * @mask: address mask in network byte order (struct in[6]_addr)
245 * @family: address family
246 * @secid: LSM secid value for the entry
247 * @audit_info: NetLabel audit information
250 * Removes an existing NetLabel static label used when protocol provided labels
251 * are not present on incoming traffic. If @dev_name is NULL then the default
252 * interface will be used. Returns zero on success, negative values on failure.
255 int netlbl_cfg_unlbl_static_del(struct net *net,
256 const char *dev_name,
260 struct netlbl_audit *audit_info)
266 addr_len = sizeof(struct in_addr);
269 addr_len = sizeof(struct in6_addr);
272 return -EPFNOSUPPORT;
275 return netlbl_unlhsh_remove(net,
276 dev_name, addr, mask, addr_len,
281 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
282 * @doi_def: CIPSO DOI definition
283 * @audit_info: NetLabel audit information
286 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
287 * success and negative values on failure.
290 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
291 struct netlbl_audit *audit_info)
293 return cipso_v4_doi_add(doi_def, audit_info);
297 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
299 * @audit_info: NetLabel audit information
302 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
303 * success and negative values on failure.
306 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
308 cipso_v4_doi_remove(doi, audit_info);
312 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
313 * @doi: the CIPSO DOI
314 * @domain: the domain mapping to add
316 * @mask: IP address mask
317 * @audit_info: NetLabel audit information
320 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
321 * subsystem. A @domain value of NULL adds a new default domain mapping.
322 * Returns zero on success, negative values on failure.
325 int netlbl_cfg_cipsov4_map_add(u32 doi,
327 const struct in_addr *addr,
328 const struct in_addr *mask,
329 struct netlbl_audit *audit_info)
331 int ret_val = -ENOMEM;
332 struct cipso_v4_doi *doi_def;
333 struct netlbl_dom_map *entry;
334 struct netlbl_domaddr_map *addrmap = NULL;
335 struct netlbl_domaddr4_map *addrinfo = NULL;
337 doi_def = cipso_v4_doi_getdef(doi);
341 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
344 if (domain != NULL) {
345 entry->domain = kstrdup(domain, GFP_ATOMIC);
346 if (entry->domain == NULL)
347 goto cfg_cipsov4_map_add_failure;
350 if (addr == NULL && mask == NULL) {
351 entry->type_def.cipsov4 = doi_def;
352 entry->type = NETLBL_NLTYPE_CIPSOV4;
353 } else if (addr != NULL && mask != NULL) {
354 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
356 goto cfg_cipsov4_map_add_failure;
357 INIT_LIST_HEAD(&addrmap->list4);
358 INIT_LIST_HEAD(&addrmap->list6);
360 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
361 if (addrinfo == NULL)
362 goto cfg_cipsov4_map_add_failure;
363 addrinfo->type_def.cipsov4 = doi_def;
364 addrinfo->type = NETLBL_NLTYPE_CIPSOV4;
365 addrinfo->list.addr = addr->s_addr & mask->s_addr;
366 addrinfo->list.mask = mask->s_addr;
367 addrinfo->list.valid = 1;
368 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
370 goto cfg_cipsov4_map_add_failure;
372 entry->type_def.addrsel = addrmap;
373 entry->type = NETLBL_NLTYPE_ADDRSELECT;
376 goto cfg_cipsov4_map_add_failure;
379 ret_val = netlbl_domhsh_add(entry, audit_info);
381 goto cfg_cipsov4_map_add_failure;
385 cfg_cipsov4_map_add_failure:
386 cipso_v4_doi_putdef(doi_def);
387 kfree(entry->domain);
395 * Security Attribute Functions
399 * netlbl_secattr_catmap_walk - Walk a LSM secattr catmap looking for a bit
400 * @catmap: the category bitmap
401 * @offset: the offset to start searching at, in bits
404 * This function walks a LSM secattr category bitmap starting at @offset and
405 * returns the spot of the first set bit or -ENOENT if no bits are set.
408 int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
411 struct netlbl_lsm_secattr_catmap *iter = catmap;
414 NETLBL_CATMAP_MAPTYPE bitmap;
416 if (offset > iter->startbit) {
417 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
422 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
423 node_bit = offset - iter->startbit -
424 (NETLBL_CATMAP_MAPSIZE * node_idx);
429 bitmap = iter->bitmap[node_idx] >> node_bit;
433 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
437 return iter->startbit +
438 (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
440 if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
441 if (iter->next != NULL) {
447 bitmap = iter->bitmap[node_idx];
455 * netlbl_secattr_catmap_walk_rng - Find the end of a string of set bits
456 * @catmap: the category bitmap
457 * @offset: the offset to start searching at, in bits
460 * This function walks a LSM secattr category bitmap starting at @offset and
461 * returns the spot of the first cleared bit or -ENOENT if the offset is past
462 * the end of the bitmap.
465 int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
468 struct netlbl_lsm_secattr_catmap *iter = catmap;
471 NETLBL_CATMAP_MAPTYPE bitmask;
472 NETLBL_CATMAP_MAPTYPE bitmap;
474 if (offset > iter->startbit) {
475 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
480 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
481 node_bit = offset - iter->startbit -
482 (NETLBL_CATMAP_MAPSIZE * node_idx);
487 bitmask = NETLBL_CATMAP_BIT << node_bit;
490 bitmap = iter->bitmap[node_idx];
491 while (bitmask != 0 && (bitmap & bitmask) != 0) {
497 return iter->startbit +
498 (NETLBL_CATMAP_MAPSIZE * node_idx) +
500 else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
501 if (iter->next == NULL)
502 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
506 bitmask = NETLBL_CATMAP_BIT;
514 * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
515 * @catmap: the category bitmap
516 * @bit: the bit to set
517 * @flags: memory allocation flags
520 * Set the bit specified by @bit in @catmap. Returns zero on success,
521 * negative values on failure.
524 int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
528 struct netlbl_lsm_secattr_catmap *iter = catmap;
532 while (iter->next != NULL &&
533 bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
535 if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
536 iter->next = netlbl_secattr_catmap_alloc(flags);
537 if (iter->next == NULL)
540 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
543 /* gcc always rounds to zero when doing integer division */
544 node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
545 node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
546 iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
552 * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
553 * @catmap: the category bitmap
554 * @start: the starting bit
555 * @end: the last bit in the string
556 * @flags: memory allocation flags
559 * Set a range of bits, starting at @start and ending with @end. Returns zero
560 * on success, negative values on failure.
563 int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
569 struct netlbl_lsm_secattr_catmap *iter = catmap;
573 /* XXX - This could probably be made a bit faster by combining writes
574 * to the catmap instead of setting a single bit each time, but for
575 * right now skipping to the start of the range in the catmap should
576 * be a nice improvement over calling the individual setbit function
577 * repeatedly from a loop. */
579 while (iter->next != NULL &&
580 start >= (iter->startbit + NETLBL_CATMAP_SIZE))
582 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
584 for (spot = start; spot <= end && ret_val == 0; spot++) {
585 if (spot >= iter_max_spot && iter->next != NULL) {
587 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
589 ret_val = netlbl_secattr_catmap_setbit(iter, spot, GFP_ATOMIC);
600 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
603 * The LSM can use this function to determine if it should use NetLabel
604 * security attributes in it's enforcement mechanism. Currently, NetLabel is
605 * considered to be enabled when it's configuration contains a valid setup for
606 * at least one labeled protocol (i.e. NetLabel can understand incoming
607 * labeled packets of at least one type); otherwise NetLabel is considered to
611 int netlbl_enabled(void)
613 /* At some point we probably want to expose this mechanism to the user
614 * as well so that admins can toggle NetLabel regardless of the
616 return (atomic_read(&netlabel_mgmt_protocount) > 0);
620 * netlbl_sock_setattr - Label a socket using the correct protocol
621 * @sk: the socket to label
622 * @family: protocol family
623 * @secattr: the security attributes
626 * Attach the correct label to the given socket using the security attributes
627 * specified in @secattr. This function requires exclusive access to @sk,
628 * which means it either needs to be in the process of being created or locked.
629 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
630 * network address selectors (can't blindly label the socket), and negative
631 * values on all other failures.
634 int netlbl_sock_setattr(struct sock *sk,
636 const struct netlbl_lsm_secattr *secattr)
639 struct netlbl_dom_map *dom_entry;
642 dom_entry = netlbl_domhsh_getentry(secattr->domain);
643 if (dom_entry == NULL) {
645 goto socket_setattr_return;
649 switch (dom_entry->type) {
650 case NETLBL_NLTYPE_ADDRSELECT:
651 ret_val = -EDESTADDRREQ;
653 case NETLBL_NLTYPE_CIPSOV4:
654 ret_val = cipso_v4_sock_setattr(sk,
655 dom_entry->type_def.cipsov4,
658 case NETLBL_NLTYPE_UNLABELED:
665 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
667 /* since we don't support any IPv6 labeling protocols right
668 * now we can optimize everything away until we do */
673 ret_val = -EPROTONOSUPPORT;
676 socket_setattr_return:
682 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
686 * Remove all the NetLabel labeling from @sk. The caller is responsible for
687 * ensuring that @sk is locked.
690 void netlbl_sock_delattr(struct sock *sk)
692 cipso_v4_sock_delattr(sk);
696 * netlbl_sock_getattr - Determine the security attributes of a sock
698 * @secattr: the security attributes
701 * Examines the given sock to see if any NetLabel style labeling has been
702 * applied to the sock, if so it parses the socket label and returns the
703 * security attributes in @secattr. Returns zero on success, negative values
707 int netlbl_sock_getattr(struct sock *sk,
708 struct netlbl_lsm_secattr *secattr)
712 switch (sk->sk_family) {
714 ret_val = cipso_v4_sock_getattr(sk, secattr);
716 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
722 ret_val = -EPROTONOSUPPORT;
729 * netlbl_conn_setattr - Label a connected socket using the correct protocol
730 * @sk: the socket to label
731 * @addr: the destination address
732 * @secattr: the security attributes
735 * Attach the correct label to the given connected socket using the security
736 * attributes specified in @secattr. The caller is responsible for ensuring
737 * that @sk is locked. Returns zero on success, negative values on failure.
740 int netlbl_conn_setattr(struct sock *sk,
741 struct sockaddr *addr,
742 const struct netlbl_lsm_secattr *secattr)
745 struct sockaddr_in *addr4;
746 struct netlbl_domaddr4_map *af4_entry;
749 switch (addr->sa_family) {
751 addr4 = (struct sockaddr_in *)addr;
752 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
753 addr4->sin_addr.s_addr);
754 if (af4_entry == NULL) {
756 goto conn_setattr_return;
758 switch (af4_entry->type) {
759 case NETLBL_NLTYPE_CIPSOV4:
760 ret_val = cipso_v4_sock_setattr(sk,
761 af4_entry->type_def.cipsov4,
764 case NETLBL_NLTYPE_UNLABELED:
765 /* just delete the protocols we support for right now
766 * but we could remove other protocols if needed */
767 cipso_v4_sock_delattr(sk);
774 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
776 /* since we don't support any IPv6 labeling protocols right
777 * now we can optimize everything away until we do */
782 ret_val = -EPROTONOSUPPORT;
791 * netlbl_req_setattr - Label a request socket using the correct protocol
792 * @req: the request socket to label
793 * @secattr: the security attributes
796 * Attach the correct label to the given socket using the security attributes
797 * specified in @secattr. Returns zero on success, negative values on failure.
800 int netlbl_req_setattr(struct request_sock *req,
801 const struct netlbl_lsm_secattr *secattr)
804 struct netlbl_dom_map *dom_entry;
805 struct netlbl_domaddr4_map *af4_entry;
807 struct cipso_v4_doi *proto_cv4;
810 dom_entry = netlbl_domhsh_getentry(secattr->domain);
811 if (dom_entry == NULL) {
813 goto req_setattr_return;
815 switch (req->rsk_ops->family) {
817 if (dom_entry->type == NETLBL_NLTYPE_ADDRSELECT) {
818 struct inet_request_sock *req_inet = inet_rsk(req);
819 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
821 if (af4_entry == NULL) {
823 goto req_setattr_return;
825 proto_type = af4_entry->type;
826 proto_cv4 = af4_entry->type_def.cipsov4;
828 proto_type = dom_entry->type;
829 proto_cv4 = dom_entry->type_def.cipsov4;
831 switch (proto_type) {
832 case NETLBL_NLTYPE_CIPSOV4:
833 ret_val = cipso_v4_req_setattr(req, proto_cv4, secattr);
835 case NETLBL_NLTYPE_UNLABELED:
836 /* just delete the protocols we support for right now
837 * but we could remove other protocols if needed */
838 cipso_v4_req_delattr(req);
845 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
847 /* since we don't support any IPv6 labeling protocols right
848 * now we can optimize everything away until we do */
853 ret_val = -EPROTONOSUPPORT;
862 * netlbl_req_delattr - Delete all the NetLabel labels on a socket
866 * Remove all the NetLabel labeling from @req.
869 void netlbl_req_delattr(struct request_sock *req)
871 cipso_v4_req_delattr(req);
875 * netlbl_skbuff_setattr - Label a packet using the correct protocol
877 * @family: protocol family
878 * @secattr: the security attributes
881 * Attach the correct label to the given packet using the security attributes
882 * specified in @secattr. Returns zero on success, negative values on failure.
885 int netlbl_skbuff_setattr(struct sk_buff *skb,
887 const struct netlbl_lsm_secattr *secattr)
891 struct netlbl_domaddr4_map *af4_entry;
897 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
899 if (af4_entry == NULL) {
901 goto skbuff_setattr_return;
903 switch (af4_entry->type) {
904 case NETLBL_NLTYPE_CIPSOV4:
905 ret_val = cipso_v4_skbuff_setattr(skb,
906 af4_entry->type_def.cipsov4,
909 case NETLBL_NLTYPE_UNLABELED:
910 /* just delete the protocols we support for right now
911 * but we could remove other protocols if needed */
912 ret_val = cipso_v4_skbuff_delattr(skb);
918 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
920 /* since we don't support any IPv6 labeling protocols right
921 * now we can optimize everything away until we do */
926 ret_val = -EPROTONOSUPPORT;
929 skbuff_setattr_return:
935 * netlbl_skbuff_getattr - Determine the security attributes of a packet
937 * @family: protocol family
938 * @secattr: the security attributes
941 * Examines the given packet to see if a recognized form of packet labeling
942 * is present, if so it parses the packet label and returns the security
943 * attributes in @secattr. Returns zero on success, negative values on
947 int netlbl_skbuff_getattr(const struct sk_buff *skb,
949 struct netlbl_lsm_secattr *secattr)
953 if (CIPSO_V4_OPTEXIST(skb) &&
954 cipso_v4_skbuff_getattr(skb, secattr) == 0)
957 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
963 return netlbl_unlabel_getattr(skb, family, secattr);
967 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
969 * @error: the error code
970 * @gateway: true if host is acting as a gateway, false otherwise
973 * Deal with a LSM problem when handling the packet in @skb, typically this is
974 * a permission denied problem (-EACCES). The correct action is determined
975 * according to the packet's labeling protocol.
978 void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
980 if (CIPSO_V4_OPTEXIST(skb))
981 cipso_v4_error(skb, error, gateway);
985 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
988 * For all of the NetLabel protocols that support some form of label mapping
989 * cache, invalidate the cache. Returns zero on success, negative values on
993 void netlbl_cache_invalidate(void)
995 cipso_v4_cache_invalidate();
999 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
1001 * @secattr: the packet's security attributes
1004 * Add the LSM security attributes for the given packet to the underlying
1005 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1009 int netlbl_cache_add(const struct sk_buff *skb,
1010 const struct netlbl_lsm_secattr *secattr)
1012 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
1015 if (CIPSO_V4_OPTEXIST(skb))
1016 return cipso_v4_cache_add(skb, secattr);
1022 * Protocol Engine Functions
1026 * netlbl_audit_start - Start an audit message
1027 * @type: audit message type
1028 * @audit_info: NetLabel audit information
1031 * Start an audit message using the type specified in @type and fill the audit
1032 * message with some fields common to all NetLabel audit messages. This
1033 * function should only be used by protocol engines, not LSMs. Returns a
1034 * pointer to the audit buffer on success, NULL on failure.
1037 struct audit_buffer *netlbl_audit_start(int type,
1038 struct netlbl_audit *audit_info)
1040 return netlbl_audit_start_common(type, audit_info);
1048 * netlbl_init - Initialize NetLabel
1051 * Perform the required NetLabel initialization before first use.
1054 static int __init netlbl_init(void)
1058 printk(KERN_INFO "NetLabel: Initializing\n");
1059 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1060 (1 << NETLBL_DOMHSH_BITSIZE));
1061 printk(KERN_INFO "NetLabel: protocols ="
1066 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1070 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1074 ret_val = netlbl_netlink_init();
1078 ret_val = netlbl_unlabel_defconf();
1081 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1086 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1089 subsys_initcall(netlbl_init);