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, 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/slab.h>
34 #include <linux/audit.h>
36 #include <linux/in6.h>
39 #include <net/netlabel.h>
40 #include <net/cipso_ipv4.h>
42 #include <linux/atomic.h>
44 #include "netlabel_domainhash.h"
45 #include "netlabel_unlabeled.h"
46 #include "netlabel_cipso_v4.h"
47 #include "netlabel_user.h"
48 #include "netlabel_mgmt.h"
49 #include "netlabel_addrlist.h"
52 * Configuration Functions
56 * netlbl_cfg_map_del - Remove a NetLabel/LSM domain mapping
57 * @domain: the domain mapping to remove
58 * @family: address family
60 * @mask: IP address mask
61 * @audit_info: NetLabel audit information
64 * Removes a NetLabel/LSM domain mapping. A @domain value of NULL causes the
65 * default domain mapping to be removed. Returns zero on success, negative
69 int netlbl_cfg_map_del(const char *domain,
73 struct netlbl_audit *audit_info)
75 if (addr == NULL && mask == NULL) {
76 return netlbl_domhsh_remove(domain, audit_info);
77 } else if (addr != NULL && mask != NULL) {
80 return netlbl_domhsh_remove_af4(domain, addr, mask,
90 * netlbl_cfg_unlbl_map_add - Add a new unlabeled mapping
91 * @domain: the domain mapping to add
92 * @family: address family
94 * @mask: IP address mask
95 * @audit_info: NetLabel audit information
98 * Adds a new unlabeled NetLabel/LSM domain mapping. A @domain value of NULL
99 * causes a new default domain mapping to be added. Returns zero on success,
100 * negative values on failure.
103 int netlbl_cfg_unlbl_map_add(const char *domain,
107 struct netlbl_audit *audit_info)
109 int ret_val = -ENOMEM;
110 struct netlbl_dom_map *entry;
111 struct netlbl_domaddr_map *addrmap = NULL;
112 struct netlbl_domaddr4_map *map4 = NULL;
113 struct netlbl_domaddr6_map *map6 = NULL;
115 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
118 if (domain != NULL) {
119 entry->domain = kstrdup(domain, GFP_ATOMIC);
120 if (entry->domain == NULL)
121 goto cfg_unlbl_map_add_failure;
124 if (addr == NULL && mask == NULL)
125 entry->type = NETLBL_NLTYPE_UNLABELED;
126 else if (addr != NULL && mask != NULL) {
127 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
129 goto cfg_unlbl_map_add_failure;
130 INIT_LIST_HEAD(&addrmap->list4);
131 INIT_LIST_HEAD(&addrmap->list6);
135 const struct in_addr *addr4 = addr;
136 const struct in_addr *mask4 = mask;
137 map4 = kzalloc(sizeof(*map4), GFP_ATOMIC);
139 goto cfg_unlbl_map_add_failure;
140 map4->type = NETLBL_NLTYPE_UNLABELED;
141 map4->list.addr = addr4->s_addr & mask4->s_addr;
142 map4->list.mask = mask4->s_addr;
143 map4->list.valid = 1;
144 ret_val = netlbl_af4list_add(&map4->list,
147 goto cfg_unlbl_map_add_failure;
150 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
152 const struct in6_addr *addr6 = addr;
153 const struct in6_addr *mask6 = mask;
154 map6 = kzalloc(sizeof(*map6), GFP_ATOMIC);
156 goto cfg_unlbl_map_add_failure;
157 map6->type = NETLBL_NLTYPE_UNLABELED;
158 ipv6_addr_copy(&map6->list.addr, addr6);
159 map6->list.addr.s6_addr32[0] &= mask6->s6_addr32[0];
160 map6->list.addr.s6_addr32[1] &= mask6->s6_addr32[1];
161 map6->list.addr.s6_addr32[2] &= mask6->s6_addr32[2];
162 map6->list.addr.s6_addr32[3] &= mask6->s6_addr32[3];
163 ipv6_addr_copy(&map6->list.mask, mask6);
164 map6->list.valid = 1;
165 ret_val = netlbl_af6list_add(&map6->list,
168 goto cfg_unlbl_map_add_failure;
173 goto cfg_unlbl_map_add_failure;
177 entry->type_def.addrsel = addrmap;
178 entry->type = NETLBL_NLTYPE_ADDRSELECT;
181 goto cfg_unlbl_map_add_failure;
184 ret_val = netlbl_domhsh_add(entry, audit_info);
186 goto cfg_unlbl_map_add_failure;
190 cfg_unlbl_map_add_failure:
191 kfree(entry->domain);
201 * netlbl_cfg_unlbl_static_add - Adds a new static label
202 * @net: network namespace
203 * @dev_name: interface name
204 * @addr: IP address in network byte order (struct in[6]_addr)
205 * @mask: address mask in network byte order (struct in[6]_addr)
206 * @family: address family
207 * @secid: LSM secid value for the entry
208 * @audit_info: NetLabel audit information
211 * Adds a new NetLabel static label to be used when protocol provided labels
212 * are not present on incoming traffic. If @dev_name is NULL then the default
213 * interface will be used. Returns zero on success, negative values on failure.
216 int netlbl_cfg_unlbl_static_add(struct net *net,
217 const char *dev_name,
222 struct netlbl_audit *audit_info)
228 addr_len = sizeof(struct in_addr);
230 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
232 addr_len = sizeof(struct in6_addr);
236 return -EPFNOSUPPORT;
239 return netlbl_unlhsh_add(net,
240 dev_name, addr, mask, addr_len,
245 * netlbl_cfg_unlbl_static_del - Removes an existing static label
246 * @net: network namespace
247 * @dev_name: interface name
248 * @addr: IP address in network byte order (struct in[6]_addr)
249 * @mask: address mask in network byte order (struct in[6]_addr)
250 * @family: address family
251 * @secid: LSM secid value for the entry
252 * @audit_info: NetLabel audit information
255 * Removes an existing NetLabel static label used when protocol provided labels
256 * are not present on incoming traffic. If @dev_name is NULL then the default
257 * interface will be used. Returns zero on success, negative values on failure.
260 int netlbl_cfg_unlbl_static_del(struct net *net,
261 const char *dev_name,
265 struct netlbl_audit *audit_info)
271 addr_len = sizeof(struct in_addr);
273 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
275 addr_len = sizeof(struct in6_addr);
279 return -EPFNOSUPPORT;
282 return netlbl_unlhsh_remove(net,
283 dev_name, addr, mask, addr_len,
288 * netlbl_cfg_cipsov4_add - Add a new CIPSOv4 DOI definition
289 * @doi_def: CIPSO DOI definition
290 * @audit_info: NetLabel audit information
293 * Add a new CIPSO DOI definition as defined by @doi_def. Returns zero on
294 * success and negative values on failure.
297 int netlbl_cfg_cipsov4_add(struct cipso_v4_doi *doi_def,
298 struct netlbl_audit *audit_info)
300 return cipso_v4_doi_add(doi_def, audit_info);
304 * netlbl_cfg_cipsov4_del - Remove an existing CIPSOv4 DOI definition
306 * @audit_info: NetLabel audit information
309 * Remove an existing CIPSO DOI definition matching @doi. Returns zero on
310 * success and negative values on failure.
313 void netlbl_cfg_cipsov4_del(u32 doi, struct netlbl_audit *audit_info)
315 cipso_v4_doi_remove(doi, audit_info);
319 * netlbl_cfg_cipsov4_map_add - Add a new CIPSOv4 DOI mapping
320 * @doi: the CIPSO DOI
321 * @domain: the domain mapping to add
323 * @mask: IP address mask
324 * @audit_info: NetLabel audit information
327 * Add a new NetLabel/LSM domain mapping for the given CIPSO DOI to the NetLabel
328 * subsystem. A @domain value of NULL adds a new default domain mapping.
329 * Returns zero on success, negative values on failure.
332 int netlbl_cfg_cipsov4_map_add(u32 doi,
334 const struct in_addr *addr,
335 const struct in_addr *mask,
336 struct netlbl_audit *audit_info)
338 int ret_val = -ENOMEM;
339 struct cipso_v4_doi *doi_def;
340 struct netlbl_dom_map *entry;
341 struct netlbl_domaddr_map *addrmap = NULL;
342 struct netlbl_domaddr4_map *addrinfo = NULL;
344 doi_def = cipso_v4_doi_getdef(doi);
348 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
351 if (domain != NULL) {
352 entry->domain = kstrdup(domain, GFP_ATOMIC);
353 if (entry->domain == NULL)
357 if (addr == NULL && mask == NULL) {
358 entry->type_def.cipsov4 = doi_def;
359 entry->type = NETLBL_NLTYPE_CIPSOV4;
360 } else if (addr != NULL && mask != NULL) {
361 addrmap = kzalloc(sizeof(*addrmap), GFP_ATOMIC);
364 INIT_LIST_HEAD(&addrmap->list4);
365 INIT_LIST_HEAD(&addrmap->list6);
367 addrinfo = kzalloc(sizeof(*addrinfo), GFP_ATOMIC);
368 if (addrinfo == NULL)
370 addrinfo->type_def.cipsov4 = doi_def;
371 addrinfo->type = NETLBL_NLTYPE_CIPSOV4;
372 addrinfo->list.addr = addr->s_addr & mask->s_addr;
373 addrinfo->list.mask = mask->s_addr;
374 addrinfo->list.valid = 1;
375 ret_val = netlbl_af4list_add(&addrinfo->list, &addrmap->list4);
377 goto cfg_cipsov4_map_add_failure;
379 entry->type_def.addrsel = addrmap;
380 entry->type = NETLBL_NLTYPE_ADDRSELECT;
386 ret_val = netlbl_domhsh_add(entry, audit_info);
388 goto cfg_cipsov4_map_add_failure;
392 cfg_cipsov4_map_add_failure:
397 kfree(entry->domain);
401 cipso_v4_doi_putdef(doi_def);
406 * Security Attribute Functions
410 * netlbl_secattr_catmap_walk - Walk a LSM secattr catmap looking for a bit
411 * @catmap: the category bitmap
412 * @offset: the offset to start searching at, in bits
415 * This function walks a LSM secattr category bitmap starting at @offset and
416 * returns the spot of the first set bit or -ENOENT if no bits are set.
419 int netlbl_secattr_catmap_walk(struct netlbl_lsm_secattr_catmap *catmap,
422 struct netlbl_lsm_secattr_catmap *iter = catmap;
425 NETLBL_CATMAP_MAPTYPE bitmap;
427 if (offset > iter->startbit) {
428 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
433 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
434 node_bit = offset - iter->startbit -
435 (NETLBL_CATMAP_MAPSIZE * node_idx);
440 bitmap = iter->bitmap[node_idx] >> node_bit;
444 while ((bitmap & NETLBL_CATMAP_BIT) == 0) {
448 return iter->startbit +
449 (NETLBL_CATMAP_MAPSIZE * node_idx) + node_bit;
451 if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
452 if (iter->next != NULL) {
458 bitmap = iter->bitmap[node_idx];
466 * netlbl_secattr_catmap_walk_rng - Find the end of a string of set bits
467 * @catmap: the category bitmap
468 * @offset: the offset to start searching at, in bits
471 * This function walks a LSM secattr category bitmap starting at @offset and
472 * returns the spot of the first cleared bit or -ENOENT if the offset is past
473 * the end of the bitmap.
476 int netlbl_secattr_catmap_walk_rng(struct netlbl_lsm_secattr_catmap *catmap,
479 struct netlbl_lsm_secattr_catmap *iter = catmap;
482 NETLBL_CATMAP_MAPTYPE bitmask;
483 NETLBL_CATMAP_MAPTYPE bitmap;
485 if (offset > iter->startbit) {
486 while (offset >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
491 node_idx = (offset - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
492 node_bit = offset - iter->startbit -
493 (NETLBL_CATMAP_MAPSIZE * node_idx);
498 bitmask = NETLBL_CATMAP_BIT << node_bit;
501 bitmap = iter->bitmap[node_idx];
502 while (bitmask != 0 && (bitmap & bitmask) != 0) {
508 return iter->startbit +
509 (NETLBL_CATMAP_MAPSIZE * node_idx) +
511 else if (++node_idx >= NETLBL_CATMAP_MAPCNT) {
512 if (iter->next == NULL)
513 return iter->startbit + NETLBL_CATMAP_SIZE - 1;
517 bitmask = NETLBL_CATMAP_BIT;
525 * netlbl_secattr_catmap_setbit - Set a bit in a LSM secattr catmap
526 * @catmap: pointer to the category bitmap
527 * @bit: the bit to set
528 * @flags: memory allocation flags
531 * Set the bit specified by @bit in @catmap. Returns zero on success,
532 * negative values on failure.
535 int netlbl_secattr_catmap_setbit(struct netlbl_lsm_secattr_catmap **catmap,
539 struct netlbl_lsm_secattr_catmap *iter = *catmap;
543 while (iter->next != NULL &&
544 bit >= (iter->startbit + NETLBL_CATMAP_SIZE))
546 if (bit < iter->startbit) {
547 iter = netlbl_secattr_catmap_alloc(flags);
550 iter->next = *catmap;
551 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
553 } else if (bit >= (iter->startbit + NETLBL_CATMAP_SIZE)) {
554 iter->next = netlbl_secattr_catmap_alloc(flags);
555 if (iter->next == NULL)
558 iter->startbit = bit & ~(NETLBL_CATMAP_SIZE - 1);
561 /* gcc always rounds to zero when doing integer division */
562 node_idx = (bit - iter->startbit) / NETLBL_CATMAP_MAPSIZE;
563 node_bit = bit - iter->startbit - (NETLBL_CATMAP_MAPSIZE * node_idx);
564 iter->bitmap[node_idx] |= NETLBL_CATMAP_BIT << node_bit;
570 * netlbl_secattr_catmap_setrng - Set a range of bits in a LSM secattr catmap
571 * @catmap: pointer to the category bitmap
572 * @start: the starting bit
573 * @end: the last bit in the string
574 * @flags: memory allocation flags
577 * Set a range of bits, starting at @start and ending with @end. Returns zero
578 * on success, negative values on failure.
581 int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap **catmap,
587 struct netlbl_lsm_secattr_catmap *iter = *catmap;
590 u32 orig_spot = iter->startbit;
592 /* XXX - This could probably be made a bit faster by combining writes
593 * to the catmap instead of setting a single bit each time, but for
594 * right now skipping to the start of the range in the catmap should
595 * be a nice improvement over calling the individual setbit function
596 * repeatedly from a loop. */
598 while (iter->next != NULL &&
599 start >= (iter->startbit + NETLBL_CATMAP_SIZE))
601 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
603 for (spot = start; spot <= end && ret_val == 0; spot++) {
604 if (spot >= iter_max_spot && iter->next != NULL) {
606 iter_max_spot = iter->startbit + NETLBL_CATMAP_SIZE;
608 ret_val = netlbl_secattr_catmap_setbit(&iter, spot, flags);
609 if (iter->startbit < orig_spot)
621 * netlbl_enabled - Determine if the NetLabel subsystem is enabled
624 * The LSM can use this function to determine if it should use NetLabel
625 * security attributes in it's enforcement mechanism. Currently, NetLabel is
626 * considered to be enabled when it's configuration contains a valid setup for
627 * at least one labeled protocol (i.e. NetLabel can understand incoming
628 * labeled packets of at least one type); otherwise NetLabel is considered to
632 int netlbl_enabled(void)
634 /* At some point we probably want to expose this mechanism to the user
635 * as well so that admins can toggle NetLabel regardless of the
637 return (atomic_read(&netlabel_mgmt_protocount) > 0);
641 * netlbl_sock_setattr - Label a socket using the correct protocol
642 * @sk: the socket to label
643 * @family: protocol family
644 * @secattr: the security attributes
647 * Attach the correct label to the given socket using the security attributes
648 * specified in @secattr. This function requires exclusive access to @sk,
649 * which means it either needs to be in the process of being created or locked.
650 * Returns zero on success, -EDESTADDRREQ if the domain is configured to use
651 * network address selectors (can't blindly label the socket), and negative
652 * values on all other failures.
655 int netlbl_sock_setattr(struct sock *sk,
657 const struct netlbl_lsm_secattr *secattr)
660 struct netlbl_dom_map *dom_entry;
663 dom_entry = netlbl_domhsh_getentry(secattr->domain);
664 if (dom_entry == NULL) {
666 goto socket_setattr_return;
670 switch (dom_entry->type) {
671 case NETLBL_NLTYPE_ADDRSELECT:
672 ret_val = -EDESTADDRREQ;
674 case NETLBL_NLTYPE_CIPSOV4:
675 ret_val = cipso_v4_sock_setattr(sk,
676 dom_entry->type_def.cipsov4,
679 case NETLBL_NLTYPE_UNLABELED:
686 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
688 /* since we don't support any IPv6 labeling protocols right
689 * now we can optimize everything away until we do */
694 ret_val = -EPROTONOSUPPORT;
697 socket_setattr_return:
703 * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
707 * Remove all the NetLabel labeling from @sk. The caller is responsible for
708 * ensuring that @sk is locked.
711 void netlbl_sock_delattr(struct sock *sk)
713 switch (sk->sk_family) {
715 cipso_v4_sock_delattr(sk);
721 * netlbl_sock_getattr - Determine the security attributes of a sock
723 * @secattr: the security attributes
726 * Examines the given sock to see if any NetLabel style labeling has been
727 * applied to the sock, if so it parses the socket label and returns the
728 * security attributes in @secattr. Returns zero on success, negative values
732 int netlbl_sock_getattr(struct sock *sk,
733 struct netlbl_lsm_secattr *secattr)
737 switch (sk->sk_family) {
739 ret_val = cipso_v4_sock_getattr(sk, secattr);
741 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
747 ret_val = -EPROTONOSUPPORT;
754 * netlbl_conn_setattr - Label a connected socket using the correct protocol
755 * @sk: the socket to label
756 * @addr: the destination address
757 * @secattr: the security attributes
760 * Attach the correct label to the given connected socket using the security
761 * attributes specified in @secattr. The caller is responsible for ensuring
762 * that @sk is locked. Returns zero on success, negative values on failure.
765 int netlbl_conn_setattr(struct sock *sk,
766 struct sockaddr *addr,
767 const struct netlbl_lsm_secattr *secattr)
770 struct sockaddr_in *addr4;
771 struct netlbl_domaddr4_map *af4_entry;
774 switch (addr->sa_family) {
776 addr4 = (struct sockaddr_in *)addr;
777 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
778 addr4->sin_addr.s_addr);
779 if (af4_entry == NULL) {
781 goto conn_setattr_return;
783 switch (af4_entry->type) {
784 case NETLBL_NLTYPE_CIPSOV4:
785 ret_val = cipso_v4_sock_setattr(sk,
786 af4_entry->type_def.cipsov4,
789 case NETLBL_NLTYPE_UNLABELED:
790 /* just delete the protocols we support for right now
791 * but we could remove other protocols if needed */
792 cipso_v4_sock_delattr(sk);
799 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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;
816 * netlbl_req_setattr - Label a request socket using the correct protocol
817 * @req: the request socket to label
818 * @secattr: the security attributes
821 * Attach the correct label to the given socket using the security attributes
822 * specified in @secattr. Returns zero on success, negative values on failure.
825 int netlbl_req_setattr(struct request_sock *req,
826 const struct netlbl_lsm_secattr *secattr)
829 struct netlbl_dom_map *dom_entry;
830 struct netlbl_domaddr4_map *af4_entry;
832 struct cipso_v4_doi *proto_cv4;
835 dom_entry = netlbl_domhsh_getentry(secattr->domain);
836 if (dom_entry == NULL) {
838 goto req_setattr_return;
840 switch (req->rsk_ops->family) {
842 if (dom_entry->type == NETLBL_NLTYPE_ADDRSELECT) {
843 struct inet_request_sock *req_inet = inet_rsk(req);
844 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
846 if (af4_entry == NULL) {
848 goto req_setattr_return;
850 proto_type = af4_entry->type;
851 proto_cv4 = af4_entry->type_def.cipsov4;
853 proto_type = dom_entry->type;
854 proto_cv4 = dom_entry->type_def.cipsov4;
856 switch (proto_type) {
857 case NETLBL_NLTYPE_CIPSOV4:
858 ret_val = cipso_v4_req_setattr(req, proto_cv4, secattr);
860 case NETLBL_NLTYPE_UNLABELED:
861 /* just delete the protocols we support for right now
862 * but we could remove other protocols if needed */
863 cipso_v4_req_delattr(req);
870 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
872 /* since we don't support any IPv6 labeling protocols right
873 * now we can optimize everything away until we do */
878 ret_val = -EPROTONOSUPPORT;
887 * netlbl_req_delattr - Delete all the NetLabel labels on a socket
891 * Remove all the NetLabel labeling from @req.
894 void netlbl_req_delattr(struct request_sock *req)
896 switch (req->rsk_ops->family) {
898 cipso_v4_req_delattr(req);
904 * netlbl_skbuff_setattr - Label a packet using the correct protocol
906 * @family: protocol family
907 * @secattr: the security attributes
910 * Attach the correct label to the given packet using the security attributes
911 * specified in @secattr. Returns zero on success, negative values on failure.
914 int netlbl_skbuff_setattr(struct sk_buff *skb,
916 const struct netlbl_lsm_secattr *secattr)
920 struct netlbl_domaddr4_map *af4_entry;
926 af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
928 if (af4_entry == NULL) {
930 goto skbuff_setattr_return;
932 switch (af4_entry->type) {
933 case NETLBL_NLTYPE_CIPSOV4:
934 ret_val = cipso_v4_skbuff_setattr(skb,
935 af4_entry->type_def.cipsov4,
938 case NETLBL_NLTYPE_UNLABELED:
939 /* just delete the protocols we support for right now
940 * but we could remove other protocols if needed */
941 ret_val = cipso_v4_skbuff_delattr(skb);
947 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
949 /* since we don't support any IPv6 labeling protocols right
950 * now we can optimize everything away until we do */
955 ret_val = -EPROTONOSUPPORT;
958 skbuff_setattr_return:
964 * netlbl_skbuff_getattr - Determine the security attributes of a packet
966 * @family: protocol family
967 * @secattr: the security attributes
970 * Examines the given packet to see if a recognized form of packet labeling
971 * is present, if so it parses the packet label and returns the security
972 * attributes in @secattr. Returns zero on success, negative values on
976 int netlbl_skbuff_getattr(const struct sk_buff *skb,
978 struct netlbl_lsm_secattr *secattr)
982 if (CIPSO_V4_OPTEXIST(skb) &&
983 cipso_v4_skbuff_getattr(skb, secattr) == 0)
986 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
992 return netlbl_unlabel_getattr(skb, family, secattr);
996 * netlbl_skbuff_err - Handle a LSM error on a sk_buff
998 * @error: the error code
999 * @gateway: true if host is acting as a gateway, false otherwise
1002 * Deal with a LSM problem when handling the packet in @skb, typically this is
1003 * a permission denied problem (-EACCES). The correct action is determined
1004 * according to the packet's labeling protocol.
1007 void netlbl_skbuff_err(struct sk_buff *skb, int error, int gateway)
1009 if (CIPSO_V4_OPTEXIST(skb))
1010 cipso_v4_error(skb, error, gateway);
1014 * netlbl_cache_invalidate - Invalidate all of the NetLabel protocol caches
1017 * For all of the NetLabel protocols that support some form of label mapping
1018 * cache, invalidate the cache. Returns zero on success, negative values on
1022 void netlbl_cache_invalidate(void)
1024 cipso_v4_cache_invalidate();
1028 * netlbl_cache_add - Add an entry to a NetLabel protocol cache
1030 * @secattr: the packet's security attributes
1033 * Add the LSM security attributes for the given packet to the underlying
1034 * NetLabel protocol's label mapping cache. Returns zero on success, negative
1038 int netlbl_cache_add(const struct sk_buff *skb,
1039 const struct netlbl_lsm_secattr *secattr)
1041 if ((secattr->flags & NETLBL_SECATTR_CACHE) == 0)
1044 if (CIPSO_V4_OPTEXIST(skb))
1045 return cipso_v4_cache_add(skb, secattr);
1051 * Protocol Engine Functions
1055 * netlbl_audit_start - Start an audit message
1056 * @type: audit message type
1057 * @audit_info: NetLabel audit information
1060 * Start an audit message using the type specified in @type and fill the audit
1061 * message with some fields common to all NetLabel audit messages. This
1062 * function should only be used by protocol engines, not LSMs. Returns a
1063 * pointer to the audit buffer on success, NULL on failure.
1066 struct audit_buffer *netlbl_audit_start(int type,
1067 struct netlbl_audit *audit_info)
1069 return netlbl_audit_start_common(type, audit_info);
1077 * netlbl_init - Initialize NetLabel
1080 * Perform the required NetLabel initialization before first use.
1083 static int __init netlbl_init(void)
1087 printk(KERN_INFO "NetLabel: Initializing\n");
1088 printk(KERN_INFO "NetLabel: domain hash size = %u\n",
1089 (1 << NETLBL_DOMHSH_BITSIZE));
1090 printk(KERN_INFO "NetLabel: protocols ="
1095 ret_val = netlbl_domhsh_init(NETLBL_DOMHSH_BITSIZE);
1099 ret_val = netlbl_unlabel_init(NETLBL_UNLHSH_BITSIZE);
1103 ret_val = netlbl_netlink_init();
1107 ret_val = netlbl_unlabel_defconf();
1110 printk(KERN_INFO "NetLabel: unlabeled traffic allowed by default\n");
1115 panic("NetLabel: failed to initialize properly (%d)\n", ret_val);
1118 subsys_initcall(netlbl_init);