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:
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);
229 addr_len = sizeof(struct in6_addr);
232 return -EPFNOSUPPORT;
235 return netlbl_unlhsh_add(net,
236 dev_name, addr, mask, addr_len,
241 * netlbl_cfg_unlbl_static_del - Removes an existing static label
242 * @net: network namespace
243 * @dev_name: interface name
244 * @addr: IP address in network byte order (struct in[6]_addr)
245 * @mask: address mask in network byte order (struct in[6]_addr)
246 * @family: address family
247 * @secid: LSM secid value for the entry
248 * @audit_info: NetLabel audit information
251 * Removes an existing NetLabel static label used when protocol provided labels
252 * are not present on incoming traffic. If @dev_name is NULL then the default
253 * interface will be used. Returns zero on success, negative values on failure.
256 int netlbl_cfg_unlbl_static_del(struct net *net,
257 const char *dev_name,
261 struct netlbl_audit *audit_info)
267 addr_len = sizeof(struct in_addr);
270 addr_len = sizeof(struct in6_addr);
273 return -EPFNOSUPPORT;
276 return netlbl_unlhsh_remove(net,
277 dev_name, addr, mask, addr_len,
282 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
283 * @doi_def: CIPSO DOI definition
284 * @audit_info: NetLabel audit information
287 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
288 * success and negative values on failure.
291 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
292 struct netlbl_audit *audit_info)
294 return cipso_v4_doi_add(doi_def, audit_info);
298 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
300 * @audit_info: NetLabel audit information
303 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
304 * success and negative values on failure.
307 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
309 cipso_v4_doi_remove(doi, audit_info);
313 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
314 * @doi: the CIPSO DOI
315 * @domain: the domain mapping to add
317 * @mask: IP address mask
318 * @audit_info: NetLabel audit information
321 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
322 * subsystem. A @domain value of NULL adds a new default domain mapping.
323 * Returns zero on success, negative values on failure.
326 int netlbl_cfg_cipsov4_map_add(u32 doi,
328 const struct in_addr *addr,
329 const struct in_addr *mask,
330 struct netlbl_audit *audit_info)
332 int ret_val = -ENOMEM;
333 struct cipso_v4_doi *doi_def;
334 struct netlbl_dom_map *entry;
335 struct netlbl_domaddr_map *addrmap = NULL;
336 struct netlbl_domaddr4_map *addrinfo = NULL;
338 doi_def = cipso_v4_doi_getdef(doi);
342 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
345 if (domain != NULL) {
346 entry->domain = kstrdup(domain, GFP_ATOMIC);
347 if (entry->domain == NULL)
348 goto cfg_cipsov4_map_add_failure;
351 if (addr == NULL && mask == NULL) {
352 entry->type_def.cipsov4 = doi_def;
353 entry->type = NETLBL_NLTYPE_CIPSOV4;
354 } else if (addr != NULL && mask != NULL) {
355 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
357 goto cfg_cipsov4_map_add_failure;
358 INIT_LIST_HEAD(&addrmap->list4);
359 INIT_LIST_HEAD(&addrmap->list6);
361 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
362 if (addrinfo == NULL)
363 goto cfg_cipsov4_map_add_failure;
364 addrinfo->type_def.cipsov4 = doi_def;
365 addrinfo->type = NETLBL_NLTYPE_CIPSOV4;
366 addrinfo->list.addr = addr->s_addr & mask->s_addr;
367 addrinfo->list.mask = mask->s_addr;
368 addrinfo->list.valid = 1;
369 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
371 goto cfg_cipsov4_map_add_failure;
373 entry->type_def.addrsel = addrmap;
374 entry->type = NETLBL_NLTYPE_ADDRSELECT;
377 goto cfg_cipsov4_map_add_failure;
380 ret_val = netlbl_domhsh_add(entry, audit_info);
382 goto cfg_cipsov4_map_add_failure;
386 cfg_cipsov4_map_add_failure:
387 cipso_v4_doi_putdef(doi_def);
389 kfree(entry->domain);
397 * Security Attribute Functions
401 * netlbl_secattr_catmap_walk - Walk a LSM secattr catmap looking for a bit
402 * @catmap: the category bitmap
403 * @offset: the offset to start searching at, in bits
406 * This function walks a LSM secattr category bitmap starting at @offset and
407 * returns the spot of the first set bit or -ENOENT if no bits are set.
410 int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
413 struct netlbl_lsm_secattr_catmap *iter = catmap;
416 NETLBL_CATMAP_MAPTYPE bitmap;
418 if (offset > iter->startbit) {
419 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
424 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
425 node_bit = offset - iter->startbit -
426 (NETLBL_CATMAP_MAPSIZE * node_idx);
431 bitmap = iter->bitmap[node_idx] >> node_bit;
435 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
439 return iter->startbit +
440 (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
442 if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
443 if (iter->next != NULL) {
449 bitmap = iter->bitmap[node_idx];
457 * netlbl_secattr_catmap_walk_rng - Find the end of a string of set bits
458 * @catmap: the category bitmap
459 * @offset: the offset to start searching at, in bits
462 * This function walks a LSM secattr category bitmap starting at @offset and
463 * returns the spot of the first cleared bit or -ENOENT if the offset is past
464 * the end of the bitmap.
467 int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
470 struct netlbl_lsm_secattr_catmap *iter = catmap;
473 NETLBL_CATMAP_MAPTYPE bitmask;
474 NETLBL_CATMAP_MAPTYPE bitmap;
476 if (offset > iter->startbit) {
477 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
482 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
483 node_bit = offset - iter->startbit -
484 (NETLBL_CATMAP_MAPSIZE * node_idx);
489 bitmask = NETLBL_CATMAP_BIT << node_bit;
492 bitmap = iter->bitmap[node_idx];
493 while (bitmask != 0 && (bitmap & bitmask) != 0) {
499 return iter->startbit +
500 (NETLBL_CATMAP_MAPSIZE * node_idx) +
502 else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
503 if (iter->next == NULL)
504 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
508 bitmask = NETLBL_CATMAP_BIT;
516 * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
517 * @catmap: the category bitmap
518 * @bit: the bit to set
519 * @flags: memory allocation flags
522 * Set the bit specified by @bit in @catmap. Returns zero on success,
523 * negative values on failure.
526 int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap *catmap,
530 struct netlbl_lsm_secattr_catmap *iter = catmap;
534 while (iter->next != NULL &&
535 bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
537 if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
538 iter->next = netlbl_secattr_catmap_alloc(flags);
539 if (iter->next == NULL)
542 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
545 /* gcc always rounds to zero when doing integer division */
546 node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
547 node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
548 iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
554 * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
555 * @catmap: the category bitmap
556 * @start: the starting bit
557 * @end: the last bit in the string
558 * @flags: memory allocation flags
561 * Set a range of bits, starting at @start and ending with @end. Returns zero
562 * on success, negative values on failure.
565 int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
571 struct netlbl_lsm_secattr_catmap *iter = catmap;
575 /* XXX - This could probably be made a bit faster by combining writes
576 * to the catmap instead of setting a single bit each time, but for
577 * right now skipping to the start of the range in the catmap should
578 * be a nice improvement over calling the individual setbit function
579 * repeatedly from a loop. */
581 while (iter->next != NULL &&
582 start >= (iter->startbit + NETLBL_CATMAP_SIZE))
584 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
586 for (spot = start; spot <= end && ret_val == 0; spot++) {
587 if (spot >= iter_max_spot && iter->next != NULL) {
589 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
591 ret_val = netlbl_secattr_catmap_setbit(iter, spot, GFP_ATOMIC);
602 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
605 * The LSM can use this function to determine if it should use NetLabel
606 * security attributes in it's enforcement mechanism. Currently, NetLabel is
607 * considered to be enabled when it's configuration contains a valid setup for
608 * at least one labeled protocol (i.e. NetLabel can understand incoming
609 * labeled packets of at least one type); otherwise NetLabel is considered to
613 int netlbl_enabled(void)
615 /* At some point we probably want to expose this mechanism to the user
616 * as well so that admins can toggle NetLabel regardless of the
618 return (atomic_read(&netlabel_mgmt_protocount) > 0);
622 * netlbl_sock_setattr - Label a socket using the correct protocol
623 * @sk: the socket to label
624 * @family: protocol family
625 * @secattr: the security attributes
628 * Attach the correct label to the given socket using the security attributes
629 * specified in @secattr. This function requires exclusive access to @sk,
630 * which means it either needs to be in the process of being created or locked.
631 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
632 * network address selectors (can't blindly label the socket), and negative
633 * values on all other failures.
636 int netlbl_sock_setattr(struct sock *sk,
638 const struct netlbl_lsm_secattr *secattr)
641 struct netlbl_dom_map *dom_entry;
644 dom_entry = netlbl_domhsh_getentry(secattr->domain);
645 if (dom_entry == NULL) {
647 goto socket_setattr_return;
651 switch (dom_entry->type) {
652 case NETLBL_NLTYPE_ADDRSELECT:
653 ret_val = -EDESTADDRREQ;
655 case NETLBL_NLTYPE_CIPSOV4:
656 ret_val = cipso_v4_sock_setattr(sk,
657 dom_entry->type_def.cipsov4,
660 case NETLBL_NLTYPE_UNLABELED:
667 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
669 /* since we don't support any IPv6 labeling protocols right
670 * now we can optimize everything away until we do */
675 ret_val = -EPROTONOSUPPORT;
678 socket_setattr_return:
684 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
688 * Remove all the NetLabel labeling from @sk. The caller is responsible for
689 * ensuring that @sk is locked.
692 void netlbl_sock_delattr(struct sock *sk)
694 cipso_v4_sock_delattr(sk);
698 * netlbl_sock_getattr - Determine the security attributes of a sock
700 * @secattr: the security attributes
703 * Examines the given sock to see if any NetLabel style labeling has been
704 * applied to the sock, if so it parses the socket label and returns the
705 * security attributes in @secattr. Returns zero on success, negative values
709 int netlbl_sock_getattr(struct sock *sk,
710 struct netlbl_lsm_secattr *secattr)
714 switch (sk->sk_family) {
716 ret_val = cipso_v4_sock_getattr(sk, secattr);
718 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
724 ret_val = -EPROTONOSUPPORT;
731 * netlbl_conn_setattr - Label a connected socket using the correct protocol
732 * @sk: the socket to label
733 * @addr: the destination address
734 * @secattr: the security attributes
737 * Attach the correct label to the given connected socket using the security
738 * attributes specified in @secattr. The caller is responsible for ensuring
739 * that @sk is locked. Returns zero on success, negative values on failure.
742 int netlbl_conn_setattr(struct sock *sk,
743 struct sockaddr *addr,
744 const struct netlbl_lsm_secattr *secattr)
747 struct sockaddr_in *addr4;
748 struct netlbl_domaddr4_map *af4_entry;
751 switch (addr->sa_family) {
753 addr4 = (struct sockaddr_in *)addr;
754 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
755 addr4->sin_addr.s_addr);
756 if (af4_entry == NULL) {
758 goto conn_setattr_return;
760 switch (af4_entry->type) {
761 case NETLBL_NLTYPE_CIPSOV4:
762 ret_val = cipso_v4_sock_setattr(sk,
763 af4_entry->type_def.cipsov4,
766 case NETLBL_NLTYPE_UNLABELED:
767 /* just delete the protocols we support for right now
768 * but we could remove other protocols if needed */
769 cipso_v4_sock_delattr(sk);
776 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
778 /* since we don't support any IPv6 labeling protocols right
779 * now we can optimize everything away until we do */
784 ret_val = -EPROTONOSUPPORT;
793 * netlbl_req_setattr - Label a request socket using the correct protocol
794 * @req: the request socket to label
795 * @secattr: the security attributes
798 * Attach the correct label to the given socket using the security attributes
799 * specified in @secattr. Returns zero on success, negative values on failure.
802 int netlbl_req_setattr(struct request_sock *req,
803 const struct netlbl_lsm_secattr *secattr)
806 struct netlbl_dom_map *dom_entry;
807 struct netlbl_domaddr4_map *af4_entry;
809 struct cipso_v4_doi *proto_cv4;
812 dom_entry = netlbl_domhsh_getentry(secattr->domain);
813 if (dom_entry == NULL) {
815 goto req_setattr_return;
817 switch (req->rsk_ops->family) {
819 if (dom_entry->type == NETLBL_NLTYPE_ADDRSELECT) {
820 struct inet_request_sock *req_inet = inet_rsk(req);
821 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
823 if (af4_entry == NULL) {
825 goto req_setattr_return;
827 proto_type = af4_entry->type;
828 proto_cv4 = af4_entry->type_def.cipsov4;
830 proto_type = dom_entry->type;
831 proto_cv4 = dom_entry->type_def.cipsov4;
833 switch (proto_type) {
834 case NETLBL_NLTYPE_CIPSOV4:
835 ret_val = cipso_v4_req_setattr(req, proto_cv4, secattr);
837 case NETLBL_NLTYPE_UNLABELED:
838 /* just delete the protocols we support for right now
839 * but we could remove other protocols if needed */
840 cipso_v4_req_delattr(req);
847 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
849 /* since we don't support any IPv6 labeling protocols right
850 * now we can optimize everything away until we do */
855 ret_val = -EPROTONOSUPPORT;
864 * netlbl_req_delattr - Delete all the NetLabel labels on a socket
868 * Remove all the NetLabel labeling from @req.
871 void netlbl_req_delattr(struct request_sock *req)
873 cipso_v4_req_delattr(req);
877 * netlbl_skbuff_setattr - Label a packet using the correct protocol
879 * @family: protocol family
880 * @secattr: the security attributes
883 * Attach the correct label to the given packet using the security attributes
884 * specified in @secattr. Returns zero on success, negative values on failure.
887 int netlbl_skbuff_setattr(struct sk_buff *skb,
889 const struct netlbl_lsm_secattr *secattr)
893 struct netlbl_domaddr4_map *af4_entry;
899 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
901 if (af4_entry == NULL) {
903 goto skbuff_setattr_return;
905 switch (af4_entry->type) {
906 case NETLBL_NLTYPE_CIPSOV4:
907 ret_val = cipso_v4_skbuff_setattr(skb,
908 af4_entry->type_def.cipsov4,
911 case NETLBL_NLTYPE_UNLABELED:
912 /* just delete the protocols we support for right now
913 * but we could remove other protocols if needed */
914 ret_val = cipso_v4_skbuff_delattr(skb);
920 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
922 /* since we don't support any IPv6 labeling protocols right
923 * now we can optimize everything away until we do */
928 ret_val = -EPROTONOSUPPORT;
931 skbuff_setattr_return:
937 * netlbl_skbuff_getattr - Determine the security attributes of a packet
939 * @family: protocol family
940 * @secattr: the security attributes
943 * Examines the given packet to see if a recognized form of packet labeling
944 * is present, if so it parses the packet label and returns the security
945 * attributes in @secattr. Returns zero on success, negative values on
949 int netlbl_skbuff_getattr(const struct sk_buff *skb,
951 struct netlbl_lsm_secattr *secattr)
955 if (CIPSO_V4_OPTEXIST(skb) &&
956 cipso_v4_skbuff_getattr(skb, secattr) == 0)
959 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
965 return netlbl_unlabel_getattr(skb, family, secattr);
969 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
971 * @error: the error code
972 * @gateway: true if host is acting as a gateway, false otherwise
975 * Deal with a LSM problem when handling the packet in @skb, typically this is
976 * a permission denied problem (-EACCES). The correct action is determined
977 * according to the packet's labeling protocol.
980 void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
982 if (CIPSO_V4_OPTEXIST(skb))
983 cipso_v4_error(skb, error, gateway);
987 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
990 * For all of the NetLabel protocols that support some form of label mapping
991 * cache, invalidate the cache. Returns zero on success, negative values on
995 void netlbl_cache_invalidate(void)
997 cipso_v4_cache_invalidate();
1001 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
1003 * @secattr: the packet's security attributes
1006 * Add the LSM security attributes for the given packet to the underlying
1007 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1011 int netlbl_cache_add(const struct sk_buff *skb,
1012 const struct netlbl_lsm_secattr *secattr)
1014 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
1017 if (CIPSO_V4_OPTEXIST(skb))
1018 return cipso_v4_cache_add(skb, secattr);
1024 * Protocol Engine Functions
1028 * netlbl_audit_start - Start an audit message
1029 * @type: audit message type
1030 * @audit_info: NetLabel audit information
1033 * Start an audit message using the type specified in @type and fill the audit
1034 * message with some fields common to all NetLabel audit messages. This
1035 * function should only be used by protocol engines, not LSMs. Returns a
1036 * pointer to the audit buffer on success, NULL on failure.
1039 struct audit_buffer *netlbl_audit_start(int type,
1040 struct netlbl_audit *audit_info)
1042 return netlbl_audit_start_common(type, audit_info);
1050 * netlbl_init - Initialize NetLabel
1053 * Perform the required NetLabel initialization before first use.
1056 static int __init netlbl_init(void)
1060 printk(KERN_INFO "NetLabel: Initializing\n");
1061 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1062 (1 << NETLBL_DOMHSH_BITSIZE));
1063 printk(KERN_INFO "NetLabel: protocols ="
1068 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1072 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1076 ret_val = netlbl_netlink_init();
1080 ret_val = netlbl_unlabel_defconf();
1083 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1088 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1091 subsys_initcall(netlbl_init);