1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/socket.h>
18 #include <linux/string.h>
19 #include <linux/net.h>
20 #include <linux/skbuff.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
29 #include <asm/uaccess.h>
31 static struct sock
*xfrm_nl
;
33 static int verify_one_alg(struct rtattr
**xfrma
, enum xfrm_attr_type_t type
)
35 struct rtattr
*rt
= xfrma
[type
- 1];
36 struct xfrm_algo
*algp
;
42 len
= (rt
->rta_len
- sizeof(*rt
)) - sizeof(*algp
);
48 len
-= (algp
->alg_key_len
+ 7U) / 8;
54 if (!algp
->alg_key_len
&&
55 strcmp(algp
->alg_name
, "digest_null") != 0)
60 if (!algp
->alg_key_len
&&
61 strcmp(algp
->alg_name
, "cipher_null") != 0)
66 /* Zero length keys are legal. */
73 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
77 static int verify_encap_tmpl(struct rtattr
**xfrma
)
79 struct rtattr
*rt
= xfrma
[XFRMA_ENCAP
- 1];
80 struct xfrm_encap_tmpl
*encap
;
85 if ((rt
->rta_len
- sizeof(*rt
)) < sizeof(*encap
))
92 static inline int verify_sec_ctx_len(struct rtattr
**xfrma
)
94 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
- 1];
95 struct xfrm_user_sec_ctx
*uctx
;
101 if (rt
->rta_len
< sizeof(*uctx
))
106 if (uctx
->ctx_len
> PAGE_SIZE
)
109 len
+= sizeof(struct xfrm_user_sec_ctx
);
110 len
+= uctx
->ctx_len
;
112 if (uctx
->len
!= len
)
119 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
120 struct rtattr
**xfrma
)
130 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
142 switch (p
->id
.proto
) {
144 if (!xfrma
[XFRMA_ALG_AUTH
-1] ||
145 xfrma
[XFRMA_ALG_CRYPT
-1] ||
146 xfrma
[XFRMA_ALG_COMP
-1])
151 if ((!xfrma
[XFRMA_ALG_AUTH
-1] &&
152 !xfrma
[XFRMA_ALG_CRYPT
-1]) ||
153 xfrma
[XFRMA_ALG_COMP
-1])
158 if (!xfrma
[XFRMA_ALG_COMP
-1] ||
159 xfrma
[XFRMA_ALG_AUTH
-1] ||
160 xfrma
[XFRMA_ALG_CRYPT
-1])
168 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_AUTH
)))
170 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_CRYPT
)))
172 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_COMP
)))
174 if ((err
= verify_encap_tmpl(xfrma
)))
176 if ((err
= verify_sec_ctx_len(xfrma
)))
195 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
196 struct xfrm_algo_desc
*(*get_byname
)(char *, int),
197 struct rtattr
*u_arg
)
199 struct rtattr
*rta
= u_arg
;
200 struct xfrm_algo
*p
, *ualg
;
201 struct xfrm_algo_desc
*algo
;
207 ualg
= RTA_DATA(rta
);
209 algo
= get_byname(ualg
->alg_name
, 1);
212 *props
= algo
->desc
.sadb_alg_id
;
214 len
= sizeof(*ualg
) + (ualg
->alg_key_len
+ 7U) / 8;
215 p
= kmalloc(len
, GFP_KERNEL
);
219 memcpy(p
, ualg
, len
);
224 static int attach_encap_tmpl(struct xfrm_encap_tmpl
**encapp
, struct rtattr
*u_arg
)
226 struct rtattr
*rta
= u_arg
;
227 struct xfrm_encap_tmpl
*p
, *uencap
;
232 uencap
= RTA_DATA(rta
);
233 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
237 memcpy(p
, uencap
, sizeof(*p
));
243 static inline int xfrm_user_sec_ctx_size(struct xfrm_policy
*xp
)
245 struct xfrm_sec_ctx
*xfrm_ctx
= xp
->security
;
249 len
+= sizeof(struct xfrm_user_sec_ctx
);
250 len
+= xfrm_ctx
->ctx_len
;
255 static int attach_sec_ctx(struct xfrm_state
*x
, struct rtattr
*u_arg
)
257 struct xfrm_user_sec_ctx
*uctx
;
262 uctx
= RTA_DATA(u_arg
);
263 return security_xfrm_state_alloc(x
, uctx
);
266 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
268 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
269 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
270 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
271 x
->props
.mode
= p
->mode
;
272 x
->props
.replay_window
= p
->replay_window
;
273 x
->props
.reqid
= p
->reqid
;
274 x
->props
.family
= p
->family
;
275 x
->props
.saddr
= p
->saddr
;
276 x
->props
.flags
= p
->flags
;
279 static struct xfrm_state
*xfrm_state_construct(struct xfrm_usersa_info
*p
,
280 struct rtattr
**xfrma
,
283 struct xfrm_state
*x
= xfrm_state_alloc();
289 copy_from_user_state(x
, p
);
291 if ((err
= attach_one_algo(&x
->aalg
, &x
->props
.aalgo
,
292 xfrm_aalg_get_byname
,
293 xfrma
[XFRMA_ALG_AUTH
-1])))
295 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
296 xfrm_ealg_get_byname
,
297 xfrma
[XFRMA_ALG_CRYPT
-1])))
299 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
300 xfrm_calg_get_byname
,
301 xfrma
[XFRMA_ALG_COMP
-1])))
303 if ((err
= attach_encap_tmpl(&x
->encap
, xfrma
[XFRMA_ENCAP
-1])))
306 err
= xfrm_init_state(x
);
310 if ((err
= attach_sec_ctx(x
, xfrma
[XFRMA_SEC_CTX
-1])))
318 x
->km
.state
= XFRM_STATE_DEAD
;
325 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
327 struct xfrm_usersa_info
*p
= NLMSG_DATA(nlh
);
328 struct xfrm_state
*x
;
332 err
= verify_newsa_info(p
, (struct rtattr
**)xfrma
);
336 x
= xfrm_state_construct(p
, (struct rtattr
**)xfrma
, &err
);
341 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
342 err
= xfrm_state_add(x
);
344 err
= xfrm_state_update(x
);
347 x
->km
.state
= XFRM_STATE_DEAD
;
352 c
.seq
= nlh
->nlmsg_seq
;
353 c
.pid
= nlh
->nlmsg_pid
;
354 c
.event
= nlh
->nlmsg_type
;
356 km_state_notify(x
, &c
);
362 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
364 struct xfrm_state
*x
;
367 struct xfrm_usersa_id
*p
= NLMSG_DATA(nlh
);
369 x
= xfrm_state_lookup(&p
->daddr
, p
->spi
, p
->proto
, p
->family
);
373 if (xfrm_state_kern(x
)) {
378 err
= xfrm_state_delete(x
);
384 c
.seq
= nlh
->nlmsg_seq
;
385 c
.pid
= nlh
->nlmsg_pid
;
386 c
.event
= nlh
->nlmsg_type
;
387 km_state_notify(x
, &c
);
393 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
395 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
396 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
397 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
398 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
399 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
400 p
->saddr
= x
->props
.saddr
;
401 p
->mode
= x
->props
.mode
;
402 p
->replay_window
= x
->props
.replay_window
;
403 p
->reqid
= x
->props
.reqid
;
404 p
->family
= x
->props
.family
;
405 p
->flags
= x
->props
.flags
;
409 struct xfrm_dump_info
{
410 struct sk_buff
*in_skb
;
411 struct sk_buff
*out_skb
;
418 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
420 struct xfrm_dump_info
*sp
= ptr
;
421 struct sk_buff
*in_skb
= sp
->in_skb
;
422 struct sk_buff
*skb
= sp
->out_skb
;
423 struct xfrm_usersa_info
*p
;
424 struct nlmsghdr
*nlh
;
425 unsigned char *b
= skb
->tail
;
427 if (sp
->this_idx
< sp
->start_idx
)
430 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
,
432 XFRM_MSG_NEWSA
, sizeof(*p
));
433 nlh
->nlmsg_flags
= sp
->nlmsg_flags
;
436 copy_to_user_state(x
, p
);
439 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
440 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
442 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
443 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
445 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
448 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
451 int ctx_size
= sizeof(struct xfrm_sec_ctx
) +
452 x
->security
->ctx_len
;
453 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
454 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
456 uctx
->exttype
= XFRMA_SEC_CTX
;
457 uctx
->len
= ctx_size
;
458 uctx
->ctx_doi
= x
->security
->ctx_doi
;
459 uctx
->ctx_alg
= x
->security
->ctx_alg
;
460 uctx
->ctx_len
= x
->security
->ctx_len
;
461 memcpy(uctx
+ 1, x
->security
->ctx_str
, x
->security
->ctx_len
);
463 nlh
->nlmsg_len
= skb
->tail
- b
;
470 skb_trim(skb
, b
- skb
->data
);
474 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
476 struct xfrm_dump_info info
;
478 info
.in_skb
= cb
->skb
;
480 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
481 info
.nlmsg_flags
= NLM_F_MULTI
;
483 info
.start_idx
= cb
->args
[0];
484 (void) xfrm_state_walk(IPSEC_PROTO_ANY
, dump_one_state
, &info
);
485 cb
->args
[0] = info
.this_idx
;
490 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
491 struct xfrm_state
*x
, u32 seq
)
493 struct xfrm_dump_info info
;
496 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
498 return ERR_PTR(-ENOMEM
);
500 NETLINK_CB(skb
).dst_pid
= NETLINK_CB(in_skb
).pid
;
501 info
.in_skb
= in_skb
;
503 info
.nlmsg_seq
= seq
;
504 info
.nlmsg_flags
= 0;
505 info
.this_idx
= info
.start_idx
= 0;
507 if (dump_one_state(x
, 0, &info
)) {
515 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
517 struct xfrm_usersa_id
*p
= NLMSG_DATA(nlh
);
518 struct xfrm_state
*x
;
519 struct sk_buff
*resp_skb
;
522 x
= xfrm_state_lookup(&p
->daddr
, p
->spi
, p
->proto
, p
->family
);
527 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
528 if (IS_ERR(resp_skb
)) {
529 err
= PTR_ERR(resp_skb
);
531 err
= netlink_unicast(xfrm_nl
, resp_skb
,
532 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
539 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
541 switch (p
->info
.id
.proto
) {
547 /* IPCOMP spi is 16-bits. */
548 if (p
->max
>= 0x10000)
562 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
564 struct xfrm_state
*x
;
565 struct xfrm_userspi_info
*p
;
566 struct sk_buff
*resp_skb
;
567 xfrm_address_t
*daddr
;
572 err
= verify_userspi_info(p
);
576 family
= p
->info
.family
;
577 daddr
= &p
->info
.id
.daddr
;
581 x
= xfrm_find_acq_byseq(p
->info
.seq
);
582 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
589 x
= xfrm_find_acq(p
->info
.mode
, p
->info
.reqid
,
590 p
->info
.id
.proto
, daddr
,
597 resp_skb
= ERR_PTR(-ENOENT
);
599 spin_lock_bh(&x
->lock
);
600 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
601 xfrm_alloc_spi(x
, htonl(p
->min
), htonl(p
->max
));
603 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
605 spin_unlock_bh(&x
->lock
);
607 if (IS_ERR(resp_skb
)) {
608 err
= PTR_ERR(resp_skb
);
612 err
= netlink_unicast(xfrm_nl
, resp_skb
,
613 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
621 static int verify_policy_dir(__u8 dir
)
625 case XFRM_POLICY_OUT
:
626 case XFRM_POLICY_FWD
:
636 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
640 case XFRM_SHARE_SESSION
:
641 case XFRM_SHARE_USER
:
642 case XFRM_SHARE_UNIQUE
:
650 case XFRM_POLICY_ALLOW
:
651 case XFRM_POLICY_BLOCK
:
658 switch (p
->sel
.family
) {
663 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
666 return -EAFNOSUPPORT
;
673 return verify_policy_dir(p
->dir
);
676 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
678 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
-1];
679 struct xfrm_user_sec_ctx
*uctx
;
685 return security_xfrm_policy_alloc(pol
, uctx
);
688 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
694 for (i
= 0; i
< nr
; i
++, ut
++) {
695 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
697 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
698 memcpy(&t
->saddr
, &ut
->saddr
,
699 sizeof(xfrm_address_t
));
700 t
->reqid
= ut
->reqid
;
702 t
->share
= ut
->share
;
703 t
->optional
= ut
->optional
;
704 t
->aalgos
= ut
->aalgos
;
705 t
->ealgos
= ut
->ealgos
;
706 t
->calgos
= ut
->calgos
;
710 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
712 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
713 struct xfrm_user_tmpl
*utmpl
;
719 nr
= (rt
->rta_len
- sizeof(*rt
)) / sizeof(*utmpl
);
721 if (nr
> XFRM_MAX_DEPTH
)
724 copy_templates(pol
, RTA_DATA(rt
), nr
);
729 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
731 xp
->priority
= p
->priority
;
732 xp
->index
= p
->index
;
733 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
734 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
735 xp
->action
= p
->action
;
736 xp
->flags
= p
->flags
;
737 xp
->family
= p
->sel
.family
;
738 /* XXX xp->share = p->share; */
741 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
743 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
744 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
745 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
746 p
->priority
= xp
->priority
;
747 p
->index
= xp
->index
;
748 p
->sel
.family
= xp
->family
;
750 p
->action
= xp
->action
;
751 p
->flags
= xp
->flags
;
752 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
755 static struct xfrm_policy
*xfrm_policy_construct(struct xfrm_userpolicy_info
*p
, struct rtattr
**xfrma
, int *errp
)
757 struct xfrm_policy
*xp
= xfrm_policy_alloc(GFP_KERNEL
);
765 copy_from_user_policy(xp
, p
);
767 if (!(err
= copy_from_user_tmpl(xp
, xfrma
)))
768 err
= copy_from_user_sec_ctx(xp
, xfrma
);
779 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
781 struct xfrm_userpolicy_info
*p
= NLMSG_DATA(nlh
);
782 struct xfrm_policy
*xp
;
787 err
= verify_newpolicy_info(p
);
790 err
= verify_sec_ctx_len((struct rtattr
**)xfrma
);
794 xp
= xfrm_policy_construct(p
, (struct rtattr
**)xfrma
, &err
);
798 /* shouldnt excl be based on nlh flags??
799 * Aha! this is anti-netlink really i.e more pfkey derived
800 * in netlink excl is a flag and you wouldnt need
801 * a type XFRM_MSG_UPDPOLICY - JHS */
802 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
803 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
805 security_xfrm_policy_free(xp
);
810 c
.event
= nlh
->nlmsg_type
;
811 c
.seq
= nlh
->nlmsg_seq
;
812 c
.pid
= nlh
->nlmsg_pid
;
813 km_policy_notify(xp
, p
->dir
, &c
);
820 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
822 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
825 if (xp
->xfrm_nr
== 0)
828 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
829 struct xfrm_user_tmpl
*up
= &vec
[i
];
830 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
832 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
833 up
->family
= xp
->family
;
834 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
835 up
->reqid
= kp
->reqid
;
837 up
->share
= kp
->share
;
838 up
->optional
= kp
->optional
;
839 up
->aalgos
= kp
->aalgos
;
840 up
->ealgos
= kp
->ealgos
;
841 up
->calgos
= kp
->calgos
;
843 RTA_PUT(skb
, XFRMA_TMPL
,
844 (sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
),
853 static int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
856 int ctx_size
= sizeof(struct xfrm_sec_ctx
) +
857 xp
->security
->ctx_len
;
858 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
859 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
861 uctx
->exttype
= XFRMA_SEC_CTX
;
862 uctx
->len
= ctx_size
;
863 uctx
->ctx_doi
= xp
->security
->ctx_doi
;
864 uctx
->ctx_alg
= xp
->security
->ctx_alg
;
865 uctx
->ctx_len
= xp
->security
->ctx_len
;
866 memcpy(uctx
+ 1, xp
->security
->ctx_str
, xp
->security
->ctx_len
);
874 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
876 struct xfrm_dump_info
*sp
= ptr
;
877 struct xfrm_userpolicy_info
*p
;
878 struct sk_buff
*in_skb
= sp
->in_skb
;
879 struct sk_buff
*skb
= sp
->out_skb
;
880 struct nlmsghdr
*nlh
;
881 unsigned char *b
= skb
->tail
;
883 if (sp
->this_idx
< sp
->start_idx
)
886 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
,
888 XFRM_MSG_NEWPOLICY
, sizeof(*p
));
890 nlh
->nlmsg_flags
= sp
->nlmsg_flags
;
892 copy_to_user_policy(xp
, p
, dir
);
893 if (copy_to_user_tmpl(xp
, skb
) < 0)
895 if (copy_to_user_sec_ctx(xp
, skb
))
898 nlh
->nlmsg_len
= skb
->tail
- b
;
904 skb_trim(skb
, b
- skb
->data
);
908 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
910 struct xfrm_dump_info info
;
912 info
.in_skb
= cb
->skb
;
914 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
915 info
.nlmsg_flags
= NLM_F_MULTI
;
917 info
.start_idx
= cb
->args
[0];
918 (void) xfrm_policy_walk(dump_one_policy
, &info
);
919 cb
->args
[0] = info
.this_idx
;
924 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
925 struct xfrm_policy
*xp
,
928 struct xfrm_dump_info info
;
931 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
933 return ERR_PTR(-ENOMEM
);
935 NETLINK_CB(skb
).dst_pid
= NETLINK_CB(in_skb
).pid
;
936 info
.in_skb
= in_skb
;
938 info
.nlmsg_seq
= seq
;
939 info
.nlmsg_flags
= 0;
940 info
.this_idx
= info
.start_idx
= 0;
942 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
950 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
952 struct xfrm_policy
*xp
;
953 struct xfrm_userpolicy_id
*p
;
959 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
961 err
= verify_policy_dir(p
->dir
);
966 xp
= xfrm_policy_byid(p
->dir
, p
->index
, delete);
968 struct rtattr
**rtattrs
= (struct rtattr
**)xfrma
;
969 struct rtattr
*rt
= rtattrs
[XFRMA_SEC_CTX
-1];
970 struct xfrm_policy tmp
;
972 err
= verify_sec_ctx_len(rtattrs
);
976 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
978 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
980 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
983 xp
= xfrm_policy_bysel_ctx(p
->dir
, &p
->sel
, tmp
.security
, delete);
984 security_xfrm_policy_free(&tmp
);
990 struct sk_buff
*resp_skb
;
992 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
993 if (IS_ERR(resp_skb
)) {
994 err
= PTR_ERR(resp_skb
);
996 err
= netlink_unicast(xfrm_nl
, resp_skb
,
1001 c
.data
.byid
= p
->index
;
1002 c
.event
= nlh
->nlmsg_type
;
1003 c
.seq
= nlh
->nlmsg_seq
;
1004 c
.pid
= nlh
->nlmsg_pid
;
1005 km_policy_notify(xp
, p
->dir
, &c
);
1013 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1016 struct xfrm_usersa_flush
*p
= NLMSG_DATA(nlh
);
1018 xfrm_state_flush(p
->proto
);
1019 c
.data
.proto
= p
->proto
;
1020 c
.event
= nlh
->nlmsg_type
;
1021 c
.seq
= nlh
->nlmsg_seq
;
1022 c
.pid
= nlh
->nlmsg_pid
;
1023 km_state_notify(NULL
, &c
);
1028 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1032 xfrm_policy_flush();
1033 c
.event
= nlh
->nlmsg_type
;
1034 c
.seq
= nlh
->nlmsg_seq
;
1035 c
.pid
= nlh
->nlmsg_pid
;
1036 km_policy_notify(NULL
, 0, &c
);
1040 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1042 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
1043 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1044 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1045 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1046 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1047 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1048 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1049 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
1050 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
1051 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
1052 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1053 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1054 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
1055 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
1056 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = NLMSG_LENGTH(0),
1061 static struct xfrm_link
{
1062 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, void **);
1063 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
1064 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
1065 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1066 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
1067 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
1068 .dump
= xfrm_dump_sa
},
1069 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1070 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
1071 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
1072 .dump
= xfrm_dump_policy
},
1073 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
1074 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1075 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1076 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
1077 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
1080 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, int *errp
)
1082 struct rtattr
*xfrma
[XFRMA_MAX
];
1083 struct xfrm_link
*link
;
1086 if (!(nlh
->nlmsg_flags
& NLM_F_REQUEST
))
1089 type
= nlh
->nlmsg_type
;
1091 /* A control message: ignore them */
1092 if (type
< XFRM_MSG_BASE
)
1095 /* Unknown message: reply with EINVAL */
1096 if (type
> XFRM_MSG_MAX
)
1099 type
-= XFRM_MSG_BASE
;
1100 link
= &xfrm_dispatch
[type
];
1102 /* All operations require privileges, even GET */
1103 if (security_netlink_recv(skb
)) {
1108 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
1109 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
1110 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
1111 if (link
->dump
== NULL
)
1114 if ((*errp
= netlink_dump_start(xfrm_nl
, skb
, nlh
,
1115 link
->dump
, NULL
)) != 0) {
1119 netlink_queue_skip(nlh
, skb
);
1123 memset(xfrma
, 0, sizeof(xfrma
));
1125 if (nlh
->nlmsg_len
< (min_len
= xfrm_msg_min
[type
]))
1128 if (nlh
->nlmsg_len
> min_len
) {
1129 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
1130 struct rtattr
*attr
= (void *) nlh
+ NLMSG_ALIGN(min_len
);
1132 while (RTA_OK(attr
, attrlen
)) {
1133 unsigned short flavor
= attr
->rta_type
;
1135 if (flavor
> XFRMA_MAX
)
1137 xfrma
[flavor
- 1] = attr
;
1139 attr
= RTA_NEXT(attr
, attrlen
);
1143 if (link
->doit
== NULL
)
1145 *errp
= link
->doit(skb
, nlh
, (void **) &xfrma
);
1154 static void xfrm_netlink_rcv(struct sock
*sk
, int len
)
1156 unsigned int qlen
= 0;
1159 down(&xfrm_cfg_sem
);
1160 netlink_run_queue(sk
, &qlen
, &xfrm_user_rcv_msg
);
1166 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, int hard
)
1168 struct xfrm_user_expire
*ue
;
1169 struct nlmsghdr
*nlh
;
1170 unsigned char *b
= skb
->tail
;
1172 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_EXPIRE
,
1174 ue
= NLMSG_DATA(nlh
);
1175 nlh
->nlmsg_flags
= 0;
1177 copy_to_user_state(x
, &ue
->state
);
1178 ue
->hard
= (hard
!= 0) ? 1 : 0;
1180 nlh
->nlmsg_len
= skb
->tail
- b
;
1184 skb_trim(skb
, b
- skb
->data
);
1188 static int xfrm_exp_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1190 struct sk_buff
*skb
;
1191 int len
= NLMSG_LENGTH(sizeof(struct xfrm_user_expire
));
1193 skb
= alloc_skb(len
, GFP_ATOMIC
);
1197 if (build_expire(skb
, x
, c
->data
.hard
) < 0)
1200 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
1201 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
1204 static int xfrm_notify_sa_flush(struct km_event
*c
)
1206 struct xfrm_usersa_flush
*p
;
1207 struct nlmsghdr
*nlh
;
1208 struct sk_buff
*skb
;
1210 int len
= NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush
));
1212 skb
= alloc_skb(len
, GFP_ATOMIC
);
1217 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
,
1218 XFRM_MSG_FLUSHSA
, sizeof(*p
));
1219 nlh
->nlmsg_flags
= 0;
1221 p
= NLMSG_DATA(nlh
);
1222 p
->proto
= c
->data
.proto
;
1224 nlh
->nlmsg_len
= skb
->tail
- b
;
1226 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
1227 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
1234 static int inline xfrm_sa_len(struct xfrm_state
*x
)
1238 l
+= RTA_SPACE(sizeof(*x
->aalg
) + (x
->aalg
->alg_key_len
+7)/8);
1240 l
+= RTA_SPACE(sizeof(*x
->ealg
) + (x
->ealg
->alg_key_len
+7)/8);
1242 l
+= RTA_SPACE(sizeof(*x
->calg
));
1244 l
+= RTA_SPACE(sizeof(*x
->encap
));
1249 static int xfrm_notify_sa(struct xfrm_state
*x
, struct km_event
*c
)
1251 struct xfrm_usersa_info
*p
;
1252 struct xfrm_usersa_id
*id
;
1253 struct nlmsghdr
*nlh
;
1254 struct sk_buff
*skb
;
1256 int len
= xfrm_sa_len(x
);
1259 headlen
= sizeof(*p
);
1260 if (c
->event
== XFRM_MSG_DELSA
) {
1261 len
+= RTA_SPACE(headlen
);
1262 headlen
= sizeof(*id
);
1264 len
+= NLMSG_SPACE(headlen
);
1266 skb
= alloc_skb(len
, GFP_ATOMIC
);
1271 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, c
->event
, headlen
);
1272 nlh
->nlmsg_flags
= 0;
1274 p
= NLMSG_DATA(nlh
);
1275 if (c
->event
== XFRM_MSG_DELSA
) {
1276 id
= NLMSG_DATA(nlh
);
1277 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
1278 id
->spi
= x
->id
.spi
;
1279 id
->family
= x
->props
.family
;
1280 id
->proto
= x
->id
.proto
;
1282 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_SA
, sizeof(*p
)));
1285 copy_to_user_state(x
, p
);
1288 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
1289 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
1291 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
1292 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
1294 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
1297 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
1299 nlh
->nlmsg_len
= skb
->tail
- b
;
1301 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
1302 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
1310 static int xfrm_send_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1314 case XFRM_MSG_EXPIRE
:
1315 return xfrm_exp_state_notify(x
, c
);
1316 case XFRM_MSG_DELSA
:
1317 case XFRM_MSG_UPDSA
:
1318 case XFRM_MSG_NEWSA
:
1319 return xfrm_notify_sa(x
, c
);
1320 case XFRM_MSG_FLUSHSA
:
1321 return xfrm_notify_sa_flush(c
);
1323 printk("xfrm_user: Unknown SA event %d\n", c
->event
);
1331 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
1332 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
1335 struct xfrm_user_acquire
*ua
;
1336 struct nlmsghdr
*nlh
;
1337 unsigned char *b
= skb
->tail
;
1338 __u32 seq
= xfrm_get_acqseq();
1340 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_ACQUIRE
,
1342 ua
= NLMSG_DATA(nlh
);
1343 nlh
->nlmsg_flags
= 0;
1345 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
1346 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
1347 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
1348 copy_to_user_policy(xp
, &ua
->policy
, dir
);
1349 ua
->aalgos
= xt
->aalgos
;
1350 ua
->ealgos
= xt
->ealgos
;
1351 ua
->calgos
= xt
->calgos
;
1352 ua
->seq
= x
->km
.seq
= seq
;
1354 if (copy_to_user_tmpl(xp
, skb
) < 0)
1356 if (copy_to_user_sec_ctx(xp
, skb
))
1359 nlh
->nlmsg_len
= skb
->tail
- b
;
1363 skb_trim(skb
, b
- skb
->data
);
1367 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
1368 struct xfrm_policy
*xp
, int dir
)
1370 struct sk_buff
*skb
;
1373 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
1374 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_acquire
));
1375 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
));
1376 skb
= alloc_skb(len
, GFP_ATOMIC
);
1380 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
1383 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_ACQUIRE
;
1384 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
1387 /* User gives us xfrm_user_policy_info followed by an array of 0
1388 * or more templates.
1390 static struct xfrm_policy
*xfrm_compile_policy(u16 family
, int opt
,
1391 u8
*data
, int len
, int *dir
)
1393 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
1394 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
1395 struct xfrm_policy
*xp
;
1400 if (opt
!= IP_XFRM_POLICY
) {
1405 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1407 if (opt
!= IPV6_XFRM_POLICY
) {
1420 if (len
< sizeof(*p
) ||
1421 verify_newpolicy_info(p
))
1424 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
1425 if (nr
> XFRM_MAX_DEPTH
)
1428 if (p
->dir
> XFRM_POLICY_OUT
)
1431 xp
= xfrm_policy_alloc(GFP_KERNEL
);
1437 copy_from_user_policy(xp
, p
);
1438 copy_templates(xp
, ut
, nr
);
1445 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
1448 struct xfrm_user_polexpire
*upe
;
1449 struct nlmsghdr
*nlh
;
1450 unsigned char *b
= skb
->tail
;
1452 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
));
1453 upe
= NLMSG_DATA(nlh
);
1454 nlh
->nlmsg_flags
= 0;
1456 copy_to_user_policy(xp
, &upe
->pol
, dir
);
1457 if (copy_to_user_tmpl(xp
, skb
) < 0)
1459 if (copy_to_user_sec_ctx(xp
, skb
))
1463 nlh
->nlmsg_len
= skb
->tail
- b
;
1467 skb_trim(skb
, b
- skb
->data
);
1471 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
1473 struct sk_buff
*skb
;
1476 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
1477 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_polexpire
));
1478 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
));
1479 skb
= alloc_skb(len
, GFP_ATOMIC
);
1483 if (build_polexpire(skb
, xp
, dir
, c
->data
.hard
) < 0)
1486 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
1487 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
1490 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
1492 struct xfrm_userpolicy_info
*p
;
1493 struct xfrm_userpolicy_id
*id
;
1494 struct nlmsghdr
*nlh
;
1495 struct sk_buff
*skb
;
1497 int len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
1500 headlen
= sizeof(*p
);
1501 if (c
->event
== XFRM_MSG_DELPOLICY
) {
1502 len
+= RTA_SPACE(headlen
);
1503 headlen
= sizeof(*id
);
1505 len
+= NLMSG_SPACE(headlen
);
1507 skb
= alloc_skb(len
, GFP_ATOMIC
);
1512 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, c
->event
, headlen
);
1514 p
= NLMSG_DATA(nlh
);
1515 if (c
->event
== XFRM_MSG_DELPOLICY
) {
1516 id
= NLMSG_DATA(nlh
);
1517 memset(id
, 0, sizeof(*id
));
1520 id
->index
= xp
->index
;
1522 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
1524 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_POLICY
, sizeof(*p
)));
1527 nlh
->nlmsg_flags
= 0;
1529 copy_to_user_policy(xp
, p
, dir
);
1530 if (copy_to_user_tmpl(xp
, skb
) < 0)
1533 nlh
->nlmsg_len
= skb
->tail
- b
;
1535 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
1536 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
1544 static int xfrm_notify_policy_flush(struct km_event
*c
)
1546 struct nlmsghdr
*nlh
;
1547 struct sk_buff
*skb
;
1549 int len
= NLMSG_LENGTH(0);
1551 skb
= alloc_skb(len
, GFP_ATOMIC
);
1557 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0);
1559 nlh
->nlmsg_len
= skb
->tail
- b
;
1561 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
1562 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
1569 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
1573 case XFRM_MSG_NEWPOLICY
:
1574 case XFRM_MSG_UPDPOLICY
:
1575 case XFRM_MSG_DELPOLICY
:
1576 return xfrm_notify_policy(xp
, dir
, c
);
1577 case XFRM_MSG_FLUSHPOLICY
:
1578 return xfrm_notify_policy_flush(c
);
1579 case XFRM_MSG_POLEXPIRE
:
1580 return xfrm_exp_policy_notify(xp
, dir
, c
);
1582 printk("xfrm_user: Unknown Policy event %d\n", c
->event
);
1589 static struct xfrm_mgr netlink_mgr
= {
1591 .notify
= xfrm_send_state_notify
,
1592 .acquire
= xfrm_send_acquire
,
1593 .compile_policy
= xfrm_compile_policy
,
1594 .notify_policy
= xfrm_send_policy_notify
,
1597 static int __init
xfrm_user_init(void)
1599 printk(KERN_INFO
"Initializing IPsec netlink socket\n");
1601 xfrm_nl
= netlink_kernel_create(NETLINK_XFRM
, XFRMNLGRP_MAX
,
1602 xfrm_netlink_rcv
, THIS_MODULE
);
1603 if (xfrm_nl
== NULL
)
1606 xfrm_register_km(&netlink_mgr
);
1611 static void __exit
xfrm_user_exit(void)
1613 xfrm_unregister_km(&netlink_mgr
);
1614 sock_release(xfrm_nl
->sk_socket
);
1617 module_init(xfrm_user_init
);
1618 module_exit(xfrm_user_exit
);
1619 MODULE_LICENSE("GPL");
1620 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);