2 * NetLabel Unlabeled Support
4 * This file defines functions for dealing with unlabeled packets for the
5 * NetLabel system. The NetLabel system manages static and dynamic label
6 * mappings for network protocols such as CIPSO and RIPSO.
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/types.h>
32 #include <linux/rcupdate.h>
33 #include <linux/list.h>
34 #include <linux/spinlock.h>
35 #include <linux/socket.h>
36 #include <linux/string.h>
37 #include <linux/skbuff.h>
38 #include <linux/audit.h>
40 #include <linux/in6.h>
42 #include <linux/ipv6.h>
43 #include <linux/notifier.h>
44 #include <linux/netdevice.h>
45 #include <linux/security.h>
46 #include <linux/slab.h>
48 #include <net/netlink.h>
49 #include <net/genetlink.h>
52 #include <net/net_namespace.h>
53 #include <net/netlabel.h>
55 #include <asm/atomic.h>
57 #include "netlabel_user.h"
58 #include "netlabel_addrlist.h"
59 #include "netlabel_domainhash.h"
60 #include "netlabel_unlabeled.h"
61 #include "netlabel_mgmt.h"
63 /* NOTE: at present we always use init's network namespace since we don't
64 * presently support different namespaces even though the majority of
65 * the functions in this file are "namespace safe" */
67 /* The unlabeled connection hash table which we use to map network interfaces
68 * and addresses of unlabeled packets to a user specified secid value for the
69 * LSM. The hash table is used to lookup the network interface entry
70 * (struct netlbl_unlhsh_iface) and then the interface entry is used to
71 * lookup an IP address match from an ordered list. If a network interface
72 * match can not be found in the hash table then the default entry
73 * (netlbl_unlhsh_def) is used. The IP address entry list
74 * (struct netlbl_unlhsh_addr) is ordered such that the entries with a
75 * larger netmask come first.
77 struct netlbl_unlhsh_tbl
{
78 struct list_head
*tbl
;
81 #define netlbl_unlhsh_addr4_entry(iter) \
82 container_of(iter, struct netlbl_unlhsh_addr4, list)
83 struct netlbl_unlhsh_addr4
{
86 struct netlbl_af4list list
;
89 #define netlbl_unlhsh_addr6_entry(iter) \
90 container_of(iter, struct netlbl_unlhsh_addr6, list)
91 struct netlbl_unlhsh_addr6
{
94 struct netlbl_af6list list
;
97 struct netlbl_unlhsh_iface
{
99 struct list_head addr4_list
;
100 struct list_head addr6_list
;
103 struct list_head list
;
107 /* Argument struct for netlbl_unlhsh_walk() */
108 struct netlbl_unlhsh_walk_arg
{
109 struct netlink_callback
*nl_cb
;
114 /* Unlabeled connection hash table */
115 /* updates should be so rare that having one spinlock for the entire
116 * hash table should be okay */
117 static DEFINE_SPINLOCK(netlbl_unlhsh_lock
);
118 #define netlbl_unlhsh_rcu_deref(p) \
119 rcu_dereference_check(p, rcu_read_lock_held() || \
120 lockdep_is_held(&netlbl_unlhsh_lock))
121 static struct netlbl_unlhsh_tbl
*netlbl_unlhsh
= NULL
;
122 static struct netlbl_unlhsh_iface
*netlbl_unlhsh_def
= NULL
;
124 /* Accept unlabeled packets flag */
125 static u8 netlabel_unlabel_acceptflg
= 0;
127 /* NetLabel Generic NETLINK unlabeled family */
128 static struct genl_family netlbl_unlabel_gnl_family
= {
129 .id
= GENL_ID_GENERATE
,
131 .name
= NETLBL_NLTYPE_UNLABELED_NAME
,
132 .version
= NETLBL_PROTO_VERSION
,
133 .maxattr
= NLBL_UNLABEL_A_MAX
,
136 /* NetLabel Netlink attribute policy */
137 static const struct nla_policy netlbl_unlabel_genl_policy
[NLBL_UNLABEL_A_MAX
+ 1] = {
138 [NLBL_UNLABEL_A_ACPTFLG
] = { .type
= NLA_U8
},
139 [NLBL_UNLABEL_A_IPV6ADDR
] = { .type
= NLA_BINARY
,
140 .len
= sizeof(struct in6_addr
) },
141 [NLBL_UNLABEL_A_IPV6MASK
] = { .type
= NLA_BINARY
,
142 .len
= sizeof(struct in6_addr
) },
143 [NLBL_UNLABEL_A_IPV4ADDR
] = { .type
= NLA_BINARY
,
144 .len
= sizeof(struct in_addr
) },
145 [NLBL_UNLABEL_A_IPV4MASK
] = { .type
= NLA_BINARY
,
146 .len
= sizeof(struct in_addr
) },
147 [NLBL_UNLABEL_A_IFACE
] = { .type
= NLA_NUL_STRING
,
148 .len
= IFNAMSIZ
- 1 },
149 [NLBL_UNLABEL_A_SECCTX
] = { .type
= NLA_BINARY
}
153 * Unlabeled Connection Hash Table Functions
157 * netlbl_unlhsh_free_addr4 - Frees an IPv4 address entry from the hash table
158 * @entry: the entry's RCU field
161 * This function is designed to be used as a callback to the call_rcu()
162 * function so that memory allocated to a hash table address entry can be
166 static void netlbl_unlhsh_free_addr4(struct rcu_head
*entry
)
168 struct netlbl_unlhsh_addr4
*ptr
;
170 ptr
= container_of(entry
, struct netlbl_unlhsh_addr4
, rcu
);
174 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
176 * netlbl_unlhsh_free_addr6 - Frees an IPv6 address entry from the hash table
177 * @entry: the entry's RCU field
180 * This function is designed to be used as a callback to the call_rcu()
181 * function so that memory allocated to a hash table address entry can be
185 static void netlbl_unlhsh_free_addr6(struct rcu_head
*entry
)
187 struct netlbl_unlhsh_addr6
*ptr
;
189 ptr
= container_of(entry
, struct netlbl_unlhsh_addr6
, rcu
);
195 * netlbl_unlhsh_free_iface - Frees an interface entry from the hash table
196 * @entry: the entry's RCU field
199 * This function is designed to be used as a callback to the call_rcu()
200 * function so that memory allocated to a hash table interface entry can be
201 * released safely. It is important to note that this function does not free
202 * the IPv4 and IPv6 address lists contained as part of an interface entry. It
203 * is up to the rest of the code to make sure an interface entry is only freed
204 * once it's address lists are empty.
207 static void netlbl_unlhsh_free_iface(struct rcu_head
*entry
)
209 struct netlbl_unlhsh_iface
*iface
;
210 struct netlbl_af4list
*iter4
;
211 struct netlbl_af4list
*tmp4
;
212 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
213 struct netlbl_af6list
*iter6
;
214 struct netlbl_af6list
*tmp6
;
217 iface
= container_of(entry
, struct netlbl_unlhsh_iface
, rcu
);
219 /* no need for locks here since we are the only one with access to this
222 netlbl_af4list_foreach_safe(iter4
, tmp4
, &iface
->addr4_list
) {
223 netlbl_af4list_remove_entry(iter4
);
224 kfree(netlbl_unlhsh_addr4_entry(iter4
));
226 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
227 netlbl_af6list_foreach_safe(iter6
, tmp6
, &iface
->addr6_list
) {
228 netlbl_af6list_remove_entry(iter6
);
229 kfree(netlbl_unlhsh_addr6_entry(iter6
));
236 * netlbl_unlhsh_hash - Hashing function for the hash table
237 * @ifindex: the network interface/device to hash
240 * This is the hashing function for the unlabeled hash table, it returns the
241 * bucket number for the given device/interface. The caller is responsible for
242 * ensuring that the hash table is protected with either a RCU read lock or
243 * the hash table lock.
246 static u32
netlbl_unlhsh_hash(int ifindex
)
248 return ifindex
& (netlbl_unlhsh_rcu_deref(netlbl_unlhsh
)->size
- 1);
252 * netlbl_unlhsh_search_iface - Search for a matching interface entry
253 * @ifindex: the network interface
256 * Searches the unlabeled connection hash table and returns a pointer to the
257 * interface entry which matches @ifindex, otherwise NULL is returned. The
258 * caller is responsible for ensuring that the hash table is protected with
259 * either a RCU read lock or the hash table lock.
262 static struct netlbl_unlhsh_iface
*netlbl_unlhsh_search_iface(int ifindex
)
265 struct list_head
*bkt_list
;
266 struct netlbl_unlhsh_iface
*iter
;
268 bkt
= netlbl_unlhsh_hash(ifindex
);
269 bkt_list
= &netlbl_unlhsh_rcu_deref(netlbl_unlhsh
)->tbl
[bkt
];
270 list_for_each_entry_rcu(iter
, bkt_list
, list
)
271 if (iter
->valid
&& iter
->ifindex
== ifindex
)
278 * netlbl_unlhsh_add_addr4 - Add a new IPv4 address entry to the hash table
279 * @iface: the associated interface entry
280 * @addr: IPv4 address in network byte order
281 * @mask: IPv4 address mask in network byte order
282 * @secid: LSM secid value for entry
285 * Add a new address entry into the unlabeled connection hash table using the
286 * interface entry specified by @iface. On success zero is returned, otherwise
287 * a negative value is returned.
290 static int netlbl_unlhsh_add_addr4(struct netlbl_unlhsh_iface
*iface
,
291 const struct in_addr
*addr
,
292 const struct in_addr
*mask
,
296 struct netlbl_unlhsh_addr4
*entry
;
298 entry
= kzalloc(sizeof(*entry
), GFP_ATOMIC
);
302 entry
->list
.addr
= addr
->s_addr
& mask
->s_addr
;
303 entry
->list
.mask
= mask
->s_addr
;
304 entry
->list
.valid
= 1;
305 entry
->secid
= secid
;
307 spin_lock(&netlbl_unlhsh_lock
);
308 ret_val
= netlbl_af4list_add(&entry
->list
, &iface
->addr4_list
);
309 spin_unlock(&netlbl_unlhsh_lock
);
316 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
318 * netlbl_unlhsh_add_addr6 - Add a new IPv6 address entry to the hash table
319 * @iface: the associated interface entry
320 * @addr: IPv6 address in network byte order
321 * @mask: IPv6 address mask in network byte order
322 * @secid: LSM secid value for entry
325 * Add a new address entry into the unlabeled connection hash table using the
326 * interface entry specified by @iface. On success zero is returned, otherwise
327 * a negative value is returned.
330 static int netlbl_unlhsh_add_addr6(struct netlbl_unlhsh_iface
*iface
,
331 const struct in6_addr
*addr
,
332 const struct in6_addr
*mask
,
336 struct netlbl_unlhsh_addr6
*entry
;
338 entry
= kzalloc(sizeof(*entry
), GFP_ATOMIC
);
342 ipv6_addr_copy(&entry
->list
.addr
, addr
);
343 entry
->list
.addr
.s6_addr32
[0] &= mask
->s6_addr32
[0];
344 entry
->list
.addr
.s6_addr32
[1] &= mask
->s6_addr32
[1];
345 entry
->list
.addr
.s6_addr32
[2] &= mask
->s6_addr32
[2];
346 entry
->list
.addr
.s6_addr32
[3] &= mask
->s6_addr32
[3];
347 ipv6_addr_copy(&entry
->list
.mask
, mask
);
348 entry
->list
.valid
= 1;
349 entry
->secid
= secid
;
351 spin_lock(&netlbl_unlhsh_lock
);
352 ret_val
= netlbl_af6list_add(&entry
->list
, &iface
->addr6_list
);
353 spin_unlock(&netlbl_unlhsh_lock
);
362 * netlbl_unlhsh_add_iface - Adds a new interface entry to the hash table
363 * @ifindex: network interface
366 * Add a new, empty, interface entry into the unlabeled connection hash table.
367 * On success a pointer to the new interface entry is returned, on failure NULL
371 static struct netlbl_unlhsh_iface
*netlbl_unlhsh_add_iface(int ifindex
)
374 struct netlbl_unlhsh_iface
*iface
;
376 iface
= kzalloc(sizeof(*iface
), GFP_ATOMIC
);
380 iface
->ifindex
= ifindex
;
381 INIT_LIST_HEAD(&iface
->addr4_list
);
382 INIT_LIST_HEAD(&iface
->addr6_list
);
385 spin_lock(&netlbl_unlhsh_lock
);
387 bkt
= netlbl_unlhsh_hash(ifindex
);
388 if (netlbl_unlhsh_search_iface(ifindex
) != NULL
)
389 goto add_iface_failure
;
390 list_add_tail_rcu(&iface
->list
,
391 &netlbl_unlhsh_rcu_deref(netlbl_unlhsh
)->tbl
[bkt
]);
393 INIT_LIST_HEAD(&iface
->list
);
394 if (netlbl_unlhsh_rcu_deref(netlbl_unlhsh_def
) != NULL
)
395 goto add_iface_failure
;
396 rcu_assign_pointer(netlbl_unlhsh_def
, iface
);
398 spin_unlock(&netlbl_unlhsh_lock
);
403 spin_unlock(&netlbl_unlhsh_lock
);
409 * netlbl_unlhsh_add - Adds a new entry to the unlabeled connection hash table
410 * @net: network namespace
411 * @dev_name: interface name
412 * @addr: IP address in network byte order
413 * @mask: address mask in network byte order
414 * @addr_len: length of address/mask (4 for IPv4, 16 for IPv6)
415 * @secid: LSM secid value for the entry
416 * @audit_info: NetLabel audit information
419 * Adds a new entry to the unlabeled connection hash table. Returns zero on
420 * success, negative values on failure.
423 int netlbl_unlhsh_add(struct net
*net
,
424 const char *dev_name
,
429 struct netlbl_audit
*audit_info
)
433 struct net_device
*dev
;
434 struct netlbl_unlhsh_iface
*iface
;
435 struct audit_buffer
*audit_buf
= NULL
;
439 if (addr_len
!= sizeof(struct in_addr
) &&
440 addr_len
!= sizeof(struct in6_addr
))
444 if (dev_name
!= NULL
) {
445 dev
= dev_get_by_name_rcu(net
, dev_name
);
448 goto unlhsh_add_return
;
450 ifindex
= dev
->ifindex
;
451 iface
= netlbl_unlhsh_search_iface(ifindex
);
454 iface
= rcu_dereference(netlbl_unlhsh_def
);
457 iface
= netlbl_unlhsh_add_iface(ifindex
);
460 goto unlhsh_add_return
;
463 audit_buf
= netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCADD
,
466 case sizeof(struct in_addr
): {
467 struct in_addr
*addr4
, *mask4
;
469 addr4
= (struct in_addr
*)addr
;
470 mask4
= (struct in_addr
*)mask
;
471 ret_val
= netlbl_unlhsh_add_addr4(iface
, addr4
, mask4
, secid
);
472 if (audit_buf
!= NULL
)
473 netlbl_af4list_audit_addr(audit_buf
, 1,
479 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
480 case sizeof(struct in6_addr
): {
481 struct in6_addr
*addr6
, *mask6
;
483 addr6
= (struct in6_addr
*)addr
;
484 mask6
= (struct in6_addr
*)mask
;
485 ret_val
= netlbl_unlhsh_add_addr6(iface
, addr6
, mask6
, secid
);
486 if (audit_buf
!= NULL
)
487 netlbl_af6list_audit_addr(audit_buf
, 1,
497 atomic_inc(&netlabel_mgmt_protocount
);
501 if (audit_buf
!= NULL
) {
502 if (security_secid_to_secctx(secid
,
505 audit_log_format(audit_buf
, " sec_obj=%s", secctx
);
506 security_release_secctx(secctx
, secctx_len
);
508 audit_log_format(audit_buf
, " res=%u", ret_val
== 0 ? 1 : 0);
509 audit_log_end(audit_buf
);
515 * netlbl_unlhsh_remove_addr4 - Remove an IPv4 address entry
516 * @net: network namespace
517 * @iface: interface entry
519 * @mask: IP address mask
520 * @audit_info: NetLabel audit information
523 * Remove an IP address entry from the unlabeled connection hash table.
524 * Returns zero on success, negative values on failure.
527 static int netlbl_unlhsh_remove_addr4(struct net
*net
,
528 struct netlbl_unlhsh_iface
*iface
,
529 const struct in_addr
*addr
,
530 const struct in_addr
*mask
,
531 struct netlbl_audit
*audit_info
)
533 struct netlbl_af4list
*list_entry
;
534 struct netlbl_unlhsh_addr4
*entry
;
535 struct audit_buffer
*audit_buf
;
536 struct net_device
*dev
;
540 spin_lock(&netlbl_unlhsh_lock
);
541 list_entry
= netlbl_af4list_remove(addr
->s_addr
, mask
->s_addr
,
543 spin_unlock(&netlbl_unlhsh_lock
);
544 if (list_entry
!= NULL
)
545 entry
= netlbl_unlhsh_addr4_entry(list_entry
);
549 audit_buf
= netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL
,
551 if (audit_buf
!= NULL
) {
552 dev
= dev_get_by_index(net
, iface
->ifindex
);
553 netlbl_af4list_audit_addr(audit_buf
, 1,
554 (dev
!= NULL
? dev
->name
: NULL
),
555 addr
->s_addr
, mask
->s_addr
);
559 security_secid_to_secctx(entry
->secid
,
560 &secctx
, &secctx_len
) == 0) {
561 audit_log_format(audit_buf
, " sec_obj=%s", secctx
);
562 security_release_secctx(secctx
, secctx_len
);
564 audit_log_format(audit_buf
, " res=%u", entry
!= NULL
? 1 : 0);
565 audit_log_end(audit_buf
);
571 call_rcu(&entry
->rcu
, netlbl_unlhsh_free_addr4
);
575 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
577 * netlbl_unlhsh_remove_addr6 - Remove an IPv6 address entry
578 * @net: network namespace
579 * @iface: interface entry
581 * @mask: IP address mask
582 * @audit_info: NetLabel audit information
585 * Remove an IP address entry from the unlabeled connection hash table.
586 * Returns zero on success, negative values on failure.
589 static int netlbl_unlhsh_remove_addr6(struct net
*net
,
590 struct netlbl_unlhsh_iface
*iface
,
591 const struct in6_addr
*addr
,
592 const struct in6_addr
*mask
,
593 struct netlbl_audit
*audit_info
)
595 struct netlbl_af6list
*list_entry
;
596 struct netlbl_unlhsh_addr6
*entry
;
597 struct audit_buffer
*audit_buf
;
598 struct net_device
*dev
;
602 spin_lock(&netlbl_unlhsh_lock
);
603 list_entry
= netlbl_af6list_remove(addr
, mask
, &iface
->addr6_list
);
604 spin_unlock(&netlbl_unlhsh_lock
);
605 if (list_entry
!= NULL
)
606 entry
= netlbl_unlhsh_addr6_entry(list_entry
);
610 audit_buf
= netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL
,
612 if (audit_buf
!= NULL
) {
613 dev
= dev_get_by_index(net
, iface
->ifindex
);
614 netlbl_af6list_audit_addr(audit_buf
, 1,
615 (dev
!= NULL
? dev
->name
: NULL
),
620 security_secid_to_secctx(entry
->secid
,
621 &secctx
, &secctx_len
) == 0) {
622 audit_log_format(audit_buf
, " sec_obj=%s", secctx
);
623 security_release_secctx(secctx
, secctx_len
);
625 audit_log_format(audit_buf
, " res=%u", entry
!= NULL
? 1 : 0);
626 audit_log_end(audit_buf
);
632 call_rcu(&entry
->rcu
, netlbl_unlhsh_free_addr6
);
638 * netlbl_unlhsh_condremove_iface - Remove an interface entry
639 * @iface: the interface entry
642 * Remove an interface entry from the unlabeled connection hash table if it is
643 * empty. An interface entry is considered to be empty if there are no
644 * address entries assigned to it.
647 static void netlbl_unlhsh_condremove_iface(struct netlbl_unlhsh_iface
*iface
)
649 struct netlbl_af4list
*iter4
;
650 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
651 struct netlbl_af6list
*iter6
;
654 spin_lock(&netlbl_unlhsh_lock
);
655 netlbl_af4list_foreach_rcu(iter4
, &iface
->addr4_list
)
656 goto unlhsh_condremove_failure
;
657 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
658 netlbl_af6list_foreach_rcu(iter6
, &iface
->addr6_list
)
659 goto unlhsh_condremove_failure
;
662 if (iface
->ifindex
> 0)
663 list_del_rcu(&iface
->list
);
665 rcu_assign_pointer(netlbl_unlhsh_def
, NULL
);
666 spin_unlock(&netlbl_unlhsh_lock
);
668 call_rcu(&iface
->rcu
, netlbl_unlhsh_free_iface
);
671 unlhsh_condremove_failure
:
672 spin_unlock(&netlbl_unlhsh_lock
);
677 * netlbl_unlhsh_remove - Remove an entry from the unlabeled hash table
678 * @net: network namespace
679 * @dev_name: interface name
680 * @addr: IP address in network byte order
681 * @mask: address mask in network byte order
682 * @addr_len: length of address/mask (4 for IPv4, 16 for IPv6)
683 * @audit_info: NetLabel audit information
686 * Removes and existing entry from the unlabeled connection hash table.
687 * Returns zero on success, negative values on failure.
690 int netlbl_unlhsh_remove(struct net
*net
,
691 const char *dev_name
,
695 struct netlbl_audit
*audit_info
)
698 struct net_device
*dev
;
699 struct netlbl_unlhsh_iface
*iface
;
701 if (addr_len
!= sizeof(struct in_addr
) &&
702 addr_len
!= sizeof(struct in6_addr
))
706 if (dev_name
!= NULL
) {
707 dev
= dev_get_by_name_rcu(net
, dev_name
);
710 goto unlhsh_remove_return
;
712 iface
= netlbl_unlhsh_search_iface(dev
->ifindex
);
714 iface
= rcu_dereference(netlbl_unlhsh_def
);
717 goto unlhsh_remove_return
;
720 case sizeof(struct in_addr
):
721 ret_val
= netlbl_unlhsh_remove_addr4(net
,
725 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
726 case sizeof(struct in6_addr
):
727 ret_val
= netlbl_unlhsh_remove_addr6(net
,
736 netlbl_unlhsh_condremove_iface(iface
);
737 atomic_dec(&netlabel_mgmt_protocount
);
740 unlhsh_remove_return
:
746 * General Helper Functions
750 * netlbl_unlhsh_netdev_handler - Network device notification handler
751 * @this: notifier block
753 * @ptr: the network device (cast to void)
756 * Handle network device events, although at present all we care about is a
757 * network device going away. In the case of a device going away we clear any
758 * related entries from the unlabeled connection hash table.
761 static int netlbl_unlhsh_netdev_handler(struct notifier_block
*this,
765 struct net_device
*dev
= ptr
;
766 struct netlbl_unlhsh_iface
*iface
= NULL
;
768 if (!net_eq(dev_net(dev
), &init_net
))
771 /* XXX - should this be a check for NETDEV_DOWN or _UNREGISTER? */
772 if (event
== NETDEV_DOWN
) {
773 spin_lock(&netlbl_unlhsh_lock
);
774 iface
= netlbl_unlhsh_search_iface(dev
->ifindex
);
775 if (iface
!= NULL
&& iface
->valid
) {
777 list_del_rcu(&iface
->list
);
780 spin_unlock(&netlbl_unlhsh_lock
);
784 call_rcu(&iface
->rcu
, netlbl_unlhsh_free_iface
);
790 * netlbl_unlabel_acceptflg_set - Set the unlabeled accept flag
791 * @value: desired value
792 * @audit_info: NetLabel audit information
795 * Set the value of the unlabeled accept flag to @value.
798 static void netlbl_unlabel_acceptflg_set(u8 value
,
799 struct netlbl_audit
*audit_info
)
801 struct audit_buffer
*audit_buf
;
804 old_val
= netlabel_unlabel_acceptflg
;
805 netlabel_unlabel_acceptflg
= value
;
806 audit_buf
= netlbl_audit_start_common(AUDIT_MAC_UNLBL_ALLOW
,
808 if (audit_buf
!= NULL
) {
809 audit_log_format(audit_buf
,
810 " unlbl_accept=%u old=%u", value
, old_val
);
811 audit_log_end(audit_buf
);
816 * netlbl_unlabel_addrinfo_get - Get the IPv4/6 address information
817 * @info: the Generic NETLINK info block
818 * @addr: the IP address
819 * @mask: the IP address mask
820 * @len: the address length
823 * Examine the Generic NETLINK message and extract the IP address information.
824 * Returns zero on success, negative values on failure.
827 static int netlbl_unlabel_addrinfo_get(struct genl_info
*info
,
834 if (info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
]) {
835 addr_len
= nla_len(info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
]);
836 if (addr_len
!= sizeof(struct in_addr
) &&
837 addr_len
!= nla_len(info
->attrs
[NLBL_UNLABEL_A_IPV4MASK
]))
840 *addr
= nla_data(info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
]);
841 *mask
= nla_data(info
->attrs
[NLBL_UNLABEL_A_IPV4MASK
]);
843 } else if (info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
]) {
844 addr_len
= nla_len(info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
]);
845 if (addr_len
!= sizeof(struct in6_addr
) &&
846 addr_len
!= nla_len(info
->attrs
[NLBL_UNLABEL_A_IPV6MASK
]))
849 *addr
= nla_data(info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
]);
850 *mask
= nla_data(info
->attrs
[NLBL_UNLABEL_A_IPV6MASK
]);
858 * NetLabel Command Handlers
862 * netlbl_unlabel_accept - Handle an ACCEPT message
863 * @skb: the NETLINK buffer
864 * @info: the Generic NETLINK info block
867 * Process a user generated ACCEPT message and set the accept flag accordingly.
868 * Returns zero on success, negative values on failure.
871 static int netlbl_unlabel_accept(struct sk_buff
*skb
, struct genl_info
*info
)
874 struct netlbl_audit audit_info
;
876 if (info
->attrs
[NLBL_UNLABEL_A_ACPTFLG
]) {
877 value
= nla_get_u8(info
->attrs
[NLBL_UNLABEL_A_ACPTFLG
]);
878 if (value
== 1 || value
== 0) {
879 netlbl_netlink_auditinfo(skb
, &audit_info
);
880 netlbl_unlabel_acceptflg_set(value
, &audit_info
);
889 * netlbl_unlabel_list - Handle a LIST message
890 * @skb: the NETLINK buffer
891 * @info: the Generic NETLINK info block
894 * Process a user generated LIST message and respond with the current status.
895 * Returns zero on success, negative values on failure.
898 static int netlbl_unlabel_list(struct sk_buff
*skb
, struct genl_info
*info
)
900 int ret_val
= -EINVAL
;
901 struct sk_buff
*ans_skb
;
904 ans_skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
907 data
= genlmsg_put_reply(ans_skb
, info
, &netlbl_unlabel_gnl_family
,
908 0, NLBL_UNLABEL_C_LIST
);
914 ret_val
= nla_put_u8(ans_skb
,
915 NLBL_UNLABEL_A_ACPTFLG
,
916 netlabel_unlabel_acceptflg
);
920 genlmsg_end(ans_skb
, data
);
921 return genlmsg_reply(ans_skb
, info
);
929 * netlbl_unlabel_staticadd - Handle a STATICADD message
930 * @skb: the NETLINK buffer
931 * @info: the Generic NETLINK info block
934 * Process a user generated STATICADD message and add a new unlabeled
935 * connection entry to the hash table. Returns zero on success, negative
939 static int netlbl_unlabel_staticadd(struct sk_buff
*skb
,
940 struct genl_info
*info
)
948 struct netlbl_audit audit_info
;
950 /* Don't allow users to add both IPv4 and IPv6 addresses for a
951 * single entry. However, allow users to create two entries, one each
952 * for IPv4 and IPv4, with the same LSM security context which should
953 * achieve the same result. */
954 if (!info
->attrs
[NLBL_UNLABEL_A_SECCTX
] ||
955 !info
->attrs
[NLBL_UNLABEL_A_IFACE
] ||
956 !((!info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
] ||
957 !info
->attrs
[NLBL_UNLABEL_A_IPV4MASK
]) ^
958 (!info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
] ||
959 !info
->attrs
[NLBL_UNLABEL_A_IPV6MASK
])))
962 netlbl_netlink_auditinfo(skb
, &audit_info
);
964 ret_val
= netlbl_unlabel_addrinfo_get(info
, &addr
, &mask
, &addr_len
);
967 dev_name
= nla_data(info
->attrs
[NLBL_UNLABEL_A_IFACE
]);
968 ret_val
= security_secctx_to_secid(
969 nla_data(info
->attrs
[NLBL_UNLABEL_A_SECCTX
]),
970 nla_len(info
->attrs
[NLBL_UNLABEL_A_SECCTX
]),
975 return netlbl_unlhsh_add(&init_net
,
976 dev_name
, addr
, mask
, addr_len
, secid
,
981 * netlbl_unlabel_staticadddef - Handle a STATICADDDEF message
982 * @skb: the NETLINK buffer
983 * @info: the Generic NETLINK info block
986 * Process a user generated STATICADDDEF message and add a new default
987 * unlabeled connection entry. Returns zero on success, negative values on
991 static int netlbl_unlabel_staticadddef(struct sk_buff
*skb
,
992 struct genl_info
*info
)
999 struct netlbl_audit audit_info
;
1001 /* Don't allow users to add both IPv4 and IPv6 addresses for a
1002 * single entry. However, allow users to create two entries, one each
1003 * for IPv4 and IPv6, with the same LSM security context which should
1004 * achieve the same result. */
1005 if (!info
->attrs
[NLBL_UNLABEL_A_SECCTX
] ||
1006 !((!info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
] ||
1007 !info
->attrs
[NLBL_UNLABEL_A_IPV4MASK
]) ^
1008 (!info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
] ||
1009 !info
->attrs
[NLBL_UNLABEL_A_IPV6MASK
])))
1012 netlbl_netlink_auditinfo(skb
, &audit_info
);
1014 ret_val
= netlbl_unlabel_addrinfo_get(info
, &addr
, &mask
, &addr_len
);
1017 ret_val
= security_secctx_to_secid(
1018 nla_data(info
->attrs
[NLBL_UNLABEL_A_SECCTX
]),
1019 nla_len(info
->attrs
[NLBL_UNLABEL_A_SECCTX
]),
1024 return netlbl_unlhsh_add(&init_net
,
1025 NULL
, addr
, mask
, addr_len
, secid
,
1030 * netlbl_unlabel_staticremove - Handle a STATICREMOVE message
1031 * @skb: the NETLINK buffer
1032 * @info: the Generic NETLINK info block
1035 * Process a user generated STATICREMOVE message and remove the specified
1036 * unlabeled connection entry. Returns zero on success, negative values on
1040 static int netlbl_unlabel_staticremove(struct sk_buff
*skb
,
1041 struct genl_info
*info
)
1048 struct netlbl_audit audit_info
;
1050 /* See the note in netlbl_unlabel_staticadd() about not allowing both
1051 * IPv4 and IPv6 in the same entry. */
1052 if (!info
->attrs
[NLBL_UNLABEL_A_IFACE
] ||
1053 !((!info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
] ||
1054 !info
->attrs
[NLBL_UNLABEL_A_IPV4MASK
]) ^
1055 (!info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
] ||
1056 !info
->attrs
[NLBL_UNLABEL_A_IPV6MASK
])))
1059 netlbl_netlink_auditinfo(skb
, &audit_info
);
1061 ret_val
= netlbl_unlabel_addrinfo_get(info
, &addr
, &mask
, &addr_len
);
1064 dev_name
= nla_data(info
->attrs
[NLBL_UNLABEL_A_IFACE
]);
1066 return netlbl_unlhsh_remove(&init_net
,
1067 dev_name
, addr
, mask
, addr_len
,
1072 * netlbl_unlabel_staticremovedef - Handle a STATICREMOVEDEF message
1073 * @skb: the NETLINK buffer
1074 * @info: the Generic NETLINK info block
1077 * Process a user generated STATICREMOVEDEF message and remove the default
1078 * unlabeled connection entry. Returns zero on success, negative values on
1082 static int netlbl_unlabel_staticremovedef(struct sk_buff
*skb
,
1083 struct genl_info
*info
)
1089 struct netlbl_audit audit_info
;
1091 /* See the note in netlbl_unlabel_staticadd() about not allowing both
1092 * IPv4 and IPv6 in the same entry. */
1093 if (!((!info
->attrs
[NLBL_UNLABEL_A_IPV4ADDR
] ||
1094 !info
->attrs
[NLBL_UNLABEL_A_IPV4MASK
]) ^
1095 (!info
->attrs
[NLBL_UNLABEL_A_IPV6ADDR
] ||
1096 !info
->attrs
[NLBL_UNLABEL_A_IPV6MASK
])))
1099 netlbl_netlink_auditinfo(skb
, &audit_info
);
1101 ret_val
= netlbl_unlabel_addrinfo_get(info
, &addr
, &mask
, &addr_len
);
1105 return netlbl_unlhsh_remove(&init_net
,
1106 NULL
, addr
, mask
, addr_len
,
1112 * netlbl_unlabel_staticlist_gen - Generate messages for STATICLIST[DEF]
1113 * @cmd: command/message
1114 * @iface: the interface entry
1115 * @addr4: the IPv4 address entry
1116 * @addr6: the IPv6 address entry
1117 * @arg: the netlbl_unlhsh_walk_arg structure
1120 * This function is designed to be used to generate a response for a
1121 * STATICLIST or STATICLISTDEF message. When called either @addr4 or @addr6
1122 * can be specified, not both, the other unspecified entry should be set to
1123 * NULL by the caller. Returns the size of the message on success, negative
1124 * values on failure.
1127 static int netlbl_unlabel_staticlist_gen(u32 cmd
,
1128 const struct netlbl_unlhsh_iface
*iface
,
1129 const struct netlbl_unlhsh_addr4
*addr4
,
1130 const struct netlbl_unlhsh_addr6
*addr6
,
1133 int ret_val
= -ENOMEM
;
1134 struct netlbl_unlhsh_walk_arg
*cb_arg
= arg
;
1135 struct net_device
*dev
;
1141 data
= genlmsg_put(cb_arg
->skb
, NETLINK_CB(cb_arg
->nl_cb
->skb
).pid
,
1142 cb_arg
->seq
, &netlbl_unlabel_gnl_family
,
1145 goto list_cb_failure
;
1147 if (iface
->ifindex
> 0) {
1148 dev
= dev_get_by_index(&init_net
, iface
->ifindex
);
1151 goto list_cb_failure
;
1153 ret_val
= nla_put_string(cb_arg
->skb
,
1154 NLBL_UNLABEL_A_IFACE
, dev
->name
);
1157 goto list_cb_failure
;
1161 struct in_addr addr_struct
;
1163 addr_struct
.s_addr
= addr4
->list
.addr
;
1164 ret_val
= nla_put(cb_arg
->skb
,
1165 NLBL_UNLABEL_A_IPV4ADDR
,
1166 sizeof(struct in_addr
),
1169 goto list_cb_failure
;
1171 addr_struct
.s_addr
= addr4
->list
.mask
;
1172 ret_val
= nla_put(cb_arg
->skb
,
1173 NLBL_UNLABEL_A_IPV4MASK
,
1174 sizeof(struct in_addr
),
1177 goto list_cb_failure
;
1179 secid
= addr4
->secid
;
1181 ret_val
= nla_put(cb_arg
->skb
,
1182 NLBL_UNLABEL_A_IPV6ADDR
,
1183 sizeof(struct in6_addr
),
1186 goto list_cb_failure
;
1188 ret_val
= nla_put(cb_arg
->skb
,
1189 NLBL_UNLABEL_A_IPV6MASK
,
1190 sizeof(struct in6_addr
),
1193 goto list_cb_failure
;
1195 secid
= addr6
->secid
;
1198 ret_val
= security_secid_to_secctx(secid
, &secctx
, &secctx_len
);
1200 goto list_cb_failure
;
1201 ret_val
= nla_put(cb_arg
->skb
,
1202 NLBL_UNLABEL_A_SECCTX
,
1205 security_release_secctx(secctx
, secctx_len
);
1207 goto list_cb_failure
;
1210 return genlmsg_end(cb_arg
->skb
, data
);
1213 genlmsg_cancel(cb_arg
->skb
, data
);
1218 * netlbl_unlabel_staticlist - Handle a STATICLIST message
1219 * @skb: the NETLINK buffer
1220 * @cb: the NETLINK callback
1223 * Process a user generated STATICLIST message and dump the unlabeled
1224 * connection hash table in a form suitable for use in a kernel generated
1225 * STATICLIST message. Returns the length of @skb.
1228 static int netlbl_unlabel_staticlist(struct sk_buff
*skb
,
1229 struct netlink_callback
*cb
)
1231 struct netlbl_unlhsh_walk_arg cb_arg
;
1232 u32 skip_bkt
= cb
->args
[0];
1233 u32 skip_chain
= cb
->args
[1];
1234 u32 skip_addr4
= cb
->args
[2];
1235 u32 skip_addr6
= cb
->args
[3];
1237 u32 iter_chain
= 0, iter_addr4
= 0, iter_addr6
= 0;
1238 struct netlbl_unlhsh_iface
*iface
;
1239 struct list_head
*iter_list
;
1240 struct netlbl_af4list
*addr4
;
1241 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1242 struct netlbl_af6list
*addr6
;
1247 cb_arg
.seq
= cb
->nlh
->nlmsg_seq
;
1250 for (iter_bkt
= skip_bkt
;
1251 iter_bkt
< rcu_dereference(netlbl_unlhsh
)->size
;
1252 iter_bkt
++, iter_chain
= 0, iter_addr4
= 0, iter_addr6
= 0) {
1253 iter_list
= &rcu_dereference(netlbl_unlhsh
)->tbl
[iter_bkt
];
1254 list_for_each_entry_rcu(iface
, iter_list
, list
) {
1255 if (!iface
->valid
||
1256 iter_chain
++ < skip_chain
)
1258 netlbl_af4list_foreach_rcu(addr4
,
1259 &iface
->addr4_list
) {
1260 if (iter_addr4
++ < skip_addr4
)
1262 if (netlbl_unlabel_staticlist_gen(
1263 NLBL_UNLABEL_C_STATICLIST
,
1265 netlbl_unlhsh_addr4_entry(addr4
),
1270 goto unlabel_staticlist_return
;
1273 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1274 netlbl_af6list_foreach_rcu(addr6
,
1275 &iface
->addr6_list
) {
1276 if (iter_addr6
++ < skip_addr6
)
1278 if (netlbl_unlabel_staticlist_gen(
1279 NLBL_UNLABEL_C_STATICLIST
,
1282 netlbl_unlhsh_addr6_entry(addr6
),
1286 goto unlabel_staticlist_return
;
1293 unlabel_staticlist_return
:
1295 cb
->args
[0] = skip_bkt
;
1296 cb
->args
[1] = skip_chain
;
1297 cb
->args
[2] = skip_addr4
;
1298 cb
->args
[3] = skip_addr6
;
1303 * netlbl_unlabel_staticlistdef - Handle a STATICLISTDEF message
1304 * @skb: the NETLINK buffer
1305 * @cb: the NETLINK callback
1308 * Process a user generated STATICLISTDEF message and dump the default
1309 * unlabeled connection entry in a form suitable for use in a kernel generated
1310 * STATICLISTDEF message. Returns the length of @skb.
1313 static int netlbl_unlabel_staticlistdef(struct sk_buff
*skb
,
1314 struct netlink_callback
*cb
)
1316 struct netlbl_unlhsh_walk_arg cb_arg
;
1317 struct netlbl_unlhsh_iface
*iface
;
1318 u32 skip_addr4
= cb
->args
[0];
1319 u32 skip_addr6
= cb
->args
[1];
1321 struct netlbl_af4list
*addr4
;
1322 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1324 struct netlbl_af6list
*addr6
;
1329 cb_arg
.seq
= cb
->nlh
->nlmsg_seq
;
1332 iface
= rcu_dereference(netlbl_unlhsh_def
);
1333 if (iface
== NULL
|| !iface
->valid
)
1334 goto unlabel_staticlistdef_return
;
1336 netlbl_af4list_foreach_rcu(addr4
, &iface
->addr4_list
) {
1337 if (iter_addr4
++ < skip_addr4
)
1339 if (netlbl_unlabel_staticlist_gen(NLBL_UNLABEL_C_STATICLISTDEF
,
1341 netlbl_unlhsh_addr4_entry(addr4
),
1345 goto unlabel_staticlistdef_return
;
1348 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1349 netlbl_af6list_foreach_rcu(addr6
, &iface
->addr6_list
) {
1350 if (iter_addr6
++ < skip_addr6
)
1352 if (netlbl_unlabel_staticlist_gen(NLBL_UNLABEL_C_STATICLISTDEF
,
1355 netlbl_unlhsh_addr6_entry(addr6
),
1358 goto unlabel_staticlistdef_return
;
1363 unlabel_staticlistdef_return
:
1365 cb
->args
[0] = skip_addr4
;
1366 cb
->args
[1] = skip_addr6
;
1371 * NetLabel Generic NETLINK Command Definitions
1374 static struct genl_ops netlbl_unlabel_genl_ops
[] = {
1376 .cmd
= NLBL_UNLABEL_C_STATICADD
,
1377 .flags
= GENL_ADMIN_PERM
,
1378 .policy
= netlbl_unlabel_genl_policy
,
1379 .doit
= netlbl_unlabel_staticadd
,
1383 .cmd
= NLBL_UNLABEL_C_STATICREMOVE
,
1384 .flags
= GENL_ADMIN_PERM
,
1385 .policy
= netlbl_unlabel_genl_policy
,
1386 .doit
= netlbl_unlabel_staticremove
,
1390 .cmd
= NLBL_UNLABEL_C_STATICLIST
,
1392 .policy
= netlbl_unlabel_genl_policy
,
1394 .dumpit
= netlbl_unlabel_staticlist
,
1397 .cmd
= NLBL_UNLABEL_C_STATICADDDEF
,
1398 .flags
= GENL_ADMIN_PERM
,
1399 .policy
= netlbl_unlabel_genl_policy
,
1400 .doit
= netlbl_unlabel_staticadddef
,
1404 .cmd
= NLBL_UNLABEL_C_STATICREMOVEDEF
,
1405 .flags
= GENL_ADMIN_PERM
,
1406 .policy
= netlbl_unlabel_genl_policy
,
1407 .doit
= netlbl_unlabel_staticremovedef
,
1411 .cmd
= NLBL_UNLABEL_C_STATICLISTDEF
,
1413 .policy
= netlbl_unlabel_genl_policy
,
1415 .dumpit
= netlbl_unlabel_staticlistdef
,
1418 .cmd
= NLBL_UNLABEL_C_ACCEPT
,
1419 .flags
= GENL_ADMIN_PERM
,
1420 .policy
= netlbl_unlabel_genl_policy
,
1421 .doit
= netlbl_unlabel_accept
,
1425 .cmd
= NLBL_UNLABEL_C_LIST
,
1427 .policy
= netlbl_unlabel_genl_policy
,
1428 .doit
= netlbl_unlabel_list
,
1434 * NetLabel Generic NETLINK Protocol Functions
1438 * netlbl_unlabel_genl_init - Register the Unlabeled NetLabel component
1441 * Register the unlabeled packet NetLabel component with the Generic NETLINK
1442 * mechanism. Returns zero on success, negative values on failure.
1445 int __init
netlbl_unlabel_genl_init(void)
1447 return genl_register_family_with_ops(&netlbl_unlabel_gnl_family
,
1448 netlbl_unlabel_genl_ops
, ARRAY_SIZE(netlbl_unlabel_genl_ops
));
1452 * NetLabel KAPI Hooks
1455 static struct notifier_block netlbl_unlhsh_netdev_notifier
= {
1456 .notifier_call
= netlbl_unlhsh_netdev_handler
,
1460 * netlbl_unlabel_init - Initialize the unlabeled connection hash table
1461 * @size: the number of bits to use for the hash buckets
1464 * Initializes the unlabeled connection hash table and registers a network
1465 * device notification handler. This function should only be called by the
1466 * NetLabel subsystem itself during initialization. Returns zero on success,
1467 * non-zero values on error.
1470 int __init
netlbl_unlabel_init(u32 size
)
1473 struct netlbl_unlhsh_tbl
*hsh_tbl
;
1478 hsh_tbl
= kmalloc(sizeof(*hsh_tbl
), GFP_KERNEL
);
1479 if (hsh_tbl
== NULL
)
1481 hsh_tbl
->size
= 1 << size
;
1482 hsh_tbl
->tbl
= kcalloc(hsh_tbl
->size
,
1483 sizeof(struct list_head
),
1485 if (hsh_tbl
->tbl
== NULL
) {
1489 for (iter
= 0; iter
< hsh_tbl
->size
; iter
++)
1490 INIT_LIST_HEAD(&hsh_tbl
->tbl
[iter
]);
1493 spin_lock(&netlbl_unlhsh_lock
);
1494 rcu_assign_pointer(netlbl_unlhsh
, hsh_tbl
);
1495 spin_unlock(&netlbl_unlhsh_lock
);
1498 register_netdevice_notifier(&netlbl_unlhsh_netdev_notifier
);
1504 * netlbl_unlabel_getattr - Get the security attributes for an unlabled packet
1506 * @family: protocol family
1507 * @secattr: the security attributes
1510 * Determine the security attributes, if any, for an unlabled packet and return
1511 * them in @secattr. Returns zero on success and negative values on failure.
1514 int netlbl_unlabel_getattr(const struct sk_buff
*skb
,
1516 struct netlbl_lsm_secattr
*secattr
)
1518 struct netlbl_unlhsh_iface
*iface
;
1521 iface
= netlbl_unlhsh_search_iface(skb
->skb_iif
);
1523 iface
= rcu_dereference(netlbl_unlhsh_def
);
1524 if (iface
== NULL
|| !iface
->valid
)
1525 goto unlabel_getattr_nolabel
;
1529 struct netlbl_af4list
*addr4
;
1532 addr4
= netlbl_af4list_search(hdr4
->saddr
,
1533 &iface
->addr4_list
);
1535 goto unlabel_getattr_nolabel
;
1536 secattr
->attr
.secid
= netlbl_unlhsh_addr4_entry(addr4
)->secid
;
1539 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1541 struct ipv6hdr
*hdr6
;
1542 struct netlbl_af6list
*addr6
;
1544 hdr6
= ipv6_hdr(skb
);
1545 addr6
= netlbl_af6list_search(&hdr6
->saddr
,
1546 &iface
->addr6_list
);
1548 goto unlabel_getattr_nolabel
;
1549 secattr
->attr
.secid
= netlbl_unlhsh_addr6_entry(addr6
)->secid
;
1554 goto unlabel_getattr_nolabel
;
1558 secattr
->flags
|= NETLBL_SECATTR_SECID
;
1559 secattr
->type
= NETLBL_NLTYPE_UNLABELED
;
1562 unlabel_getattr_nolabel
:
1564 if (netlabel_unlabel_acceptflg
== 0)
1566 secattr
->type
= NETLBL_NLTYPE_UNLABELED
;
1571 * netlbl_unlabel_defconf - Set the default config to allow unlabeled packets
1574 * Set the default NetLabel configuration to allow incoming unlabeled packets
1575 * and to send unlabeled network traffic by default.
1578 int __init
netlbl_unlabel_defconf(void)
1581 struct netlbl_dom_map
*entry
;
1582 struct netlbl_audit audit_info
;
1584 /* Only the kernel is allowed to call this function and the only time
1585 * it is called is at bootup before the audit subsystem is reporting
1586 * messages so don't worry to much about these values. */
1587 security_task_getsecid(current
, &audit_info
.secid
);
1588 audit_info
.loginuid
= 0;
1589 audit_info
.sessionid
= 0;
1591 entry
= kzalloc(sizeof(*entry
), GFP_KERNEL
);
1594 entry
->type
= NETLBL_NLTYPE_UNLABELED
;
1595 ret_val
= netlbl_domhsh_add_default(entry
, &audit_info
);
1599 netlbl_unlabel_acceptflg_set(1, &audit_info
);