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/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/pfkeyv2.h>
24 #include <linux/ipsec.h>
25 #include <linux/init.h>
26 #include <linux/security.h>
29 #include <net/netlink.h>
30 #include <asm/uaccess.h>
31 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
32 #include <linux/in6.h>
34 #include <linux/audit.h>
36 static int verify_one_alg(struct rtattr
**xfrma
, enum xfrm_attr_type_t type
)
38 struct rtattr
*rt
= xfrma
[type
- 1];
39 struct xfrm_algo
*algp
;
45 len
= (rt
->rta_len
- sizeof(*rt
)) - sizeof(*algp
);
51 len
-= (algp
->alg_key_len
+ 7U) / 8;
57 if (!algp
->alg_key_len
&&
58 strcmp(algp
->alg_name
, "digest_null") != 0)
63 if (!algp
->alg_key_len
&&
64 strcmp(algp
->alg_name
, "cipher_null") != 0)
69 /* Zero length keys are legal. */
76 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
80 static int verify_encap_tmpl(struct rtattr
**xfrma
)
82 struct rtattr
*rt
= xfrma
[XFRMA_ENCAP
- 1];
83 struct xfrm_encap_tmpl
*encap
;
88 if ((rt
->rta_len
- sizeof(*rt
)) < sizeof(*encap
))
94 static int verify_one_addr(struct rtattr
**xfrma
, enum xfrm_attr_type_t type
,
95 xfrm_address_t
**addrp
)
97 struct rtattr
*rt
= xfrma
[type
- 1];
102 if ((rt
->rta_len
- sizeof(*rt
)) < sizeof(**addrp
))
106 *addrp
= RTA_DATA(rt
);
111 static inline int verify_sec_ctx_len(struct rtattr
**xfrma
)
113 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
- 1];
114 struct xfrm_user_sec_ctx
*uctx
;
120 if (rt
->rta_len
< sizeof(*uctx
))
125 len
+= sizeof(struct xfrm_user_sec_ctx
);
126 len
+= uctx
->ctx_len
;
128 if (uctx
->len
!= len
)
135 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
136 struct rtattr
**xfrma
)
146 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
158 switch (p
->id
.proto
) {
160 if (!xfrma
[XFRMA_ALG_AUTH
-1] ||
161 xfrma
[XFRMA_ALG_CRYPT
-1] ||
162 xfrma
[XFRMA_ALG_COMP
-1])
167 if ((!xfrma
[XFRMA_ALG_AUTH
-1] &&
168 !xfrma
[XFRMA_ALG_CRYPT
-1]) ||
169 xfrma
[XFRMA_ALG_COMP
-1])
174 if (!xfrma
[XFRMA_ALG_COMP
-1] ||
175 xfrma
[XFRMA_ALG_AUTH
-1] ||
176 xfrma
[XFRMA_ALG_CRYPT
-1])
180 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
181 case IPPROTO_DSTOPTS
:
182 case IPPROTO_ROUTING
:
183 if (xfrma
[XFRMA_ALG_COMP
-1] ||
184 xfrma
[XFRMA_ALG_AUTH
-1] ||
185 xfrma
[XFRMA_ALG_CRYPT
-1] ||
186 xfrma
[XFRMA_ENCAP
-1] ||
187 xfrma
[XFRMA_SEC_CTX
-1] ||
188 !xfrma
[XFRMA_COADDR
-1])
197 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_AUTH
)))
199 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_CRYPT
)))
201 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_COMP
)))
203 if ((err
= verify_encap_tmpl(xfrma
)))
205 if ((err
= verify_sec_ctx_len(xfrma
)))
207 if ((err
= verify_one_addr(xfrma
, XFRMA_COADDR
, NULL
)))
212 case XFRM_MODE_TRANSPORT
:
213 case XFRM_MODE_TUNNEL
:
214 case XFRM_MODE_ROUTEOPTIMIZATION
:
228 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
229 struct xfrm_algo_desc
*(*get_byname
)(char *, int),
230 struct rtattr
*u_arg
)
232 struct rtattr
*rta
= u_arg
;
233 struct xfrm_algo
*p
, *ualg
;
234 struct xfrm_algo_desc
*algo
;
240 ualg
= RTA_DATA(rta
);
242 algo
= get_byname(ualg
->alg_name
, 1);
245 *props
= algo
->desc
.sadb_alg_id
;
247 len
= sizeof(*ualg
) + (ualg
->alg_key_len
+ 7U) / 8;
248 p
= kmemdup(ualg
, len
, GFP_KERNEL
);
252 strcpy(p
->alg_name
, algo
->name
);
257 static int attach_encap_tmpl(struct xfrm_encap_tmpl
**encapp
, struct rtattr
*u_arg
)
259 struct rtattr
*rta
= u_arg
;
260 struct xfrm_encap_tmpl
*p
, *uencap
;
265 uencap
= RTA_DATA(rta
);
266 p
= kmemdup(uencap
, sizeof(*p
), GFP_KERNEL
);
275 static inline int xfrm_user_sec_ctx_size(struct xfrm_policy
*xp
)
277 struct xfrm_sec_ctx
*xfrm_ctx
= xp
->security
;
281 len
+= sizeof(struct xfrm_user_sec_ctx
);
282 len
+= xfrm_ctx
->ctx_len
;
287 static int attach_sec_ctx(struct xfrm_state
*x
, struct rtattr
*u_arg
)
289 struct xfrm_user_sec_ctx
*uctx
;
294 uctx
= RTA_DATA(u_arg
);
295 return security_xfrm_state_alloc(x
, uctx
);
298 static int attach_one_addr(xfrm_address_t
**addrpp
, struct rtattr
*u_arg
)
300 struct rtattr
*rta
= u_arg
;
301 xfrm_address_t
*p
, *uaddrp
;
306 uaddrp
= RTA_DATA(rta
);
307 p
= kmemdup(uaddrp
, sizeof(*p
), GFP_KERNEL
);
315 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
317 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
318 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
319 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
320 x
->props
.mode
= p
->mode
;
321 x
->props
.replay_window
= p
->replay_window
;
322 x
->props
.reqid
= p
->reqid
;
323 x
->props
.family
= p
->family
;
324 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
325 x
->props
.flags
= p
->flags
;
329 * someday when pfkey also has support, we could have the code
330 * somehow made shareable and move it to xfrm_state.c - JHS
333 static int xfrm_update_ae_params(struct xfrm_state
*x
, struct rtattr
**xfrma
)
336 struct rtattr
*rp
= xfrma
[XFRMA_REPLAY_VAL
-1];
337 struct rtattr
*lt
= xfrma
[XFRMA_LTIME_VAL
-1];
338 struct rtattr
*et
= xfrma
[XFRMA_ETIMER_THRESH
-1];
339 struct rtattr
*rt
= xfrma
[XFRMA_REPLAY_THRESH
-1];
342 struct xfrm_replay_state
*replay
;
343 if (RTA_PAYLOAD(rp
) < sizeof(*replay
))
345 replay
= RTA_DATA(rp
);
346 memcpy(&x
->replay
, replay
, sizeof(*replay
));
347 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
351 struct xfrm_lifetime_cur
*ltime
;
352 if (RTA_PAYLOAD(lt
) < sizeof(*ltime
))
354 ltime
= RTA_DATA(lt
);
355 x
->curlft
.bytes
= ltime
->bytes
;
356 x
->curlft
.packets
= ltime
->packets
;
357 x
->curlft
.add_time
= ltime
->add_time
;
358 x
->curlft
.use_time
= ltime
->use_time
;
362 if (RTA_PAYLOAD(et
) < sizeof(u32
))
364 x
->replay_maxage
= *(u32
*)RTA_DATA(et
);
368 if (RTA_PAYLOAD(rt
) < sizeof(u32
))
370 x
->replay_maxdiff
= *(u32
*)RTA_DATA(rt
);
378 static struct xfrm_state
*xfrm_state_construct(struct xfrm_usersa_info
*p
,
379 struct rtattr
**xfrma
,
382 struct xfrm_state
*x
= xfrm_state_alloc();
388 copy_from_user_state(x
, p
);
390 if ((err
= attach_one_algo(&x
->aalg
, &x
->props
.aalgo
,
391 xfrm_aalg_get_byname
,
392 xfrma
[XFRMA_ALG_AUTH
-1])))
394 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
395 xfrm_ealg_get_byname
,
396 xfrma
[XFRMA_ALG_CRYPT
-1])))
398 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
399 xfrm_calg_get_byname
,
400 xfrma
[XFRMA_ALG_COMP
-1])))
402 if ((err
= attach_encap_tmpl(&x
->encap
, xfrma
[XFRMA_ENCAP
-1])))
404 if ((err
= attach_one_addr(&x
->coaddr
, xfrma
[XFRMA_COADDR
-1])))
406 err
= xfrm_init_state(x
);
410 if ((err
= attach_sec_ctx(x
, xfrma
[XFRMA_SEC_CTX
-1])))
414 x
->replay_maxdiff
= sysctl_xfrm_aevent_rseqth
;
415 /* sysctl_xfrm_aevent_etime is in 100ms units */
416 x
->replay_maxage
= (sysctl_xfrm_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
417 x
->preplay
.bitmap
= 0;
418 x
->preplay
.seq
= x
->replay
.seq
+x
->replay_maxdiff
;
419 x
->preplay
.oseq
= x
->replay
.oseq
+x
->replay_maxdiff
;
421 /* override default values from above */
423 err
= xfrm_update_ae_params(x
, (struct rtattr
**)xfrma
);
430 x
->km
.state
= XFRM_STATE_DEAD
;
437 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
439 struct xfrm_usersa_info
*p
= NLMSG_DATA(nlh
);
440 struct xfrm_state
*x
;
444 err
= verify_newsa_info(p
, (struct rtattr
**)xfrma
);
448 x
= xfrm_state_construct(p
, (struct rtattr
**)xfrma
, &err
);
453 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
454 err
= xfrm_state_add(x
);
456 err
= xfrm_state_update(x
);
458 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
459 AUDIT_MAC_IPSEC_ADDSA
, err
? 0 : 1, NULL
, x
);
462 x
->km
.state
= XFRM_STATE_DEAD
;
467 c
.seq
= nlh
->nlmsg_seq
;
468 c
.pid
= nlh
->nlmsg_pid
;
469 c
.event
= nlh
->nlmsg_type
;
471 km_state_notify(x
, &c
);
477 static struct xfrm_state
*xfrm_user_state_lookup(struct xfrm_usersa_id
*p
,
478 struct rtattr
**xfrma
,
481 struct xfrm_state
*x
= NULL
;
484 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
486 x
= xfrm_state_lookup(&p
->daddr
, p
->spi
, p
->proto
, p
->family
);
488 xfrm_address_t
*saddr
= NULL
;
490 err
= verify_one_addr(xfrma
, XFRMA_SRCADDR
, &saddr
);
500 x
= xfrm_state_lookup_byaddr(&p
->daddr
, saddr
, p
->proto
,
510 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
512 struct xfrm_state
*x
;
515 struct xfrm_usersa_id
*p
= NLMSG_DATA(nlh
);
517 x
= xfrm_user_state_lookup(p
, (struct rtattr
**)xfrma
, &err
);
521 if ((err
= security_xfrm_state_delete(x
)) != 0)
524 if (xfrm_state_kern(x
)) {
529 err
= xfrm_state_delete(x
);
531 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
532 AUDIT_MAC_IPSEC_DELSA
, err
? 0 : 1, NULL
, x
);
537 c
.seq
= nlh
->nlmsg_seq
;
538 c
.pid
= nlh
->nlmsg_pid
;
539 c
.event
= nlh
->nlmsg_type
;
540 km_state_notify(x
, &c
);
547 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
549 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
550 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
551 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
552 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
553 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
554 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
555 p
->mode
= x
->props
.mode
;
556 p
->replay_window
= x
->props
.replay_window
;
557 p
->reqid
= x
->props
.reqid
;
558 p
->family
= x
->props
.family
;
559 p
->flags
= x
->props
.flags
;
563 struct xfrm_dump_info
{
564 struct sk_buff
*in_skb
;
565 struct sk_buff
*out_skb
;
572 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
574 struct xfrm_dump_info
*sp
= ptr
;
575 struct sk_buff
*in_skb
= sp
->in_skb
;
576 struct sk_buff
*skb
= sp
->out_skb
;
577 struct xfrm_usersa_info
*p
;
578 struct nlmsghdr
*nlh
;
579 unsigned char *b
= skb
->tail
;
581 if (sp
->this_idx
< sp
->start_idx
)
584 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
,
586 XFRM_MSG_NEWSA
, sizeof(*p
));
587 nlh
->nlmsg_flags
= sp
->nlmsg_flags
;
590 copy_to_user_state(x
, p
);
593 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
594 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
596 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
597 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
599 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
602 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
605 int ctx_size
= sizeof(struct xfrm_sec_ctx
) +
606 x
->security
->ctx_len
;
607 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
608 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
610 uctx
->exttype
= XFRMA_SEC_CTX
;
611 uctx
->len
= ctx_size
;
612 uctx
->ctx_doi
= x
->security
->ctx_doi
;
613 uctx
->ctx_alg
= x
->security
->ctx_alg
;
614 uctx
->ctx_len
= x
->security
->ctx_len
;
615 memcpy(uctx
+ 1, x
->security
->ctx_str
, x
->security
->ctx_len
);
619 RTA_PUT(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
622 RTA_PUT(skb
, XFRMA_LASTUSED
, sizeof(x
->lastused
), &x
->lastused
);
624 nlh
->nlmsg_len
= skb
->tail
- b
;
631 skb_trim(skb
, b
- skb
->data
);
635 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
637 struct xfrm_dump_info info
;
639 info
.in_skb
= cb
->skb
;
641 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
642 info
.nlmsg_flags
= NLM_F_MULTI
;
644 info
.start_idx
= cb
->args
[0];
645 (void) xfrm_state_walk(0, dump_one_state
, &info
);
646 cb
->args
[0] = info
.this_idx
;
651 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
652 struct xfrm_state
*x
, u32 seq
)
654 struct xfrm_dump_info info
;
657 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
659 return ERR_PTR(-ENOMEM
);
661 info
.in_skb
= in_skb
;
663 info
.nlmsg_seq
= seq
;
664 info
.nlmsg_flags
= 0;
665 info
.this_idx
= info
.start_idx
= 0;
667 if (dump_one_state(x
, 0, &info
)) {
675 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
677 struct xfrm_usersa_id
*p
= NLMSG_DATA(nlh
);
678 struct xfrm_state
*x
;
679 struct sk_buff
*resp_skb
;
682 x
= xfrm_user_state_lookup(p
, (struct rtattr
**)xfrma
, &err
);
686 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
687 if (IS_ERR(resp_skb
)) {
688 err
= PTR_ERR(resp_skb
);
690 err
= netlink_unicast(xfrm_nl
, resp_skb
,
691 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
698 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
700 switch (p
->info
.id
.proto
) {
706 /* IPCOMP spi is 16-bits. */
707 if (p
->max
>= 0x10000)
721 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
723 struct xfrm_state
*x
;
724 struct xfrm_userspi_info
*p
;
725 struct sk_buff
*resp_skb
;
726 xfrm_address_t
*daddr
;
731 err
= verify_userspi_info(p
);
735 family
= p
->info
.family
;
736 daddr
= &p
->info
.id
.daddr
;
740 x
= xfrm_find_acq_byseq(p
->info
.seq
);
741 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
748 x
= xfrm_find_acq(p
->info
.mode
, p
->info
.reqid
,
749 p
->info
.id
.proto
, daddr
,
756 resp_skb
= ERR_PTR(-ENOENT
);
758 spin_lock_bh(&x
->lock
);
759 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
760 xfrm_alloc_spi(x
, htonl(p
->min
), htonl(p
->max
));
762 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
764 spin_unlock_bh(&x
->lock
);
766 if (IS_ERR(resp_skb
)) {
767 err
= PTR_ERR(resp_skb
);
771 err
= netlink_unicast(xfrm_nl
, resp_skb
,
772 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
780 static int verify_policy_dir(u8 dir
)
784 case XFRM_POLICY_OUT
:
785 case XFRM_POLICY_FWD
:
795 static int verify_policy_type(u8 type
)
798 case XFRM_POLICY_TYPE_MAIN
:
799 #ifdef CONFIG_XFRM_SUB_POLICY
800 case XFRM_POLICY_TYPE_SUB
:
811 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
815 case XFRM_SHARE_SESSION
:
816 case XFRM_SHARE_USER
:
817 case XFRM_SHARE_UNIQUE
:
825 case XFRM_POLICY_ALLOW
:
826 case XFRM_POLICY_BLOCK
:
833 switch (p
->sel
.family
) {
838 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
841 return -EAFNOSUPPORT
;
848 return verify_policy_dir(p
->dir
);
851 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
853 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
-1];
854 struct xfrm_user_sec_ctx
*uctx
;
860 return security_xfrm_policy_alloc(pol
, uctx
);
863 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
869 for (i
= 0; i
< nr
; i
++, ut
++) {
870 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
872 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
873 memcpy(&t
->saddr
, &ut
->saddr
,
874 sizeof(xfrm_address_t
));
875 t
->reqid
= ut
->reqid
;
877 t
->share
= ut
->share
;
878 t
->optional
= ut
->optional
;
879 t
->aalgos
= ut
->aalgos
;
880 t
->ealgos
= ut
->ealgos
;
881 t
->calgos
= ut
->calgos
;
882 t
->encap_family
= ut
->family
;
886 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
890 if (nr
> XFRM_MAX_DEPTH
)
893 for (i
= 0; i
< nr
; i
++) {
894 /* We never validated the ut->family value, so many
895 * applications simply leave it at zero. The check was
896 * never made and ut->family was ignored because all
897 * templates could be assumed to have the same family as
898 * the policy itself. Now that we will have ipv4-in-ipv6
899 * and ipv6-in-ipv4 tunnels, this is no longer true.
902 ut
[i
].family
= family
;
904 switch (ut
[i
].family
) {
907 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
919 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
921 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
926 struct xfrm_user_tmpl
*utmpl
= RTA_DATA(rt
);
927 int nr
= (rt
->rta_len
- sizeof(*rt
)) / sizeof(*utmpl
);
930 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
934 copy_templates(pol
, RTA_DATA(rt
), nr
);
939 static int copy_from_user_policy_type(u8
*tp
, struct rtattr
**xfrma
)
941 struct rtattr
*rt
= xfrma
[XFRMA_POLICY_TYPE
-1];
942 struct xfrm_userpolicy_type
*upt
;
943 u8 type
= XFRM_POLICY_TYPE_MAIN
;
947 if (rt
->rta_len
< sizeof(*upt
))
954 err
= verify_policy_type(type
);
962 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
964 xp
->priority
= p
->priority
;
965 xp
->index
= p
->index
;
966 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
967 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
968 xp
->action
= p
->action
;
969 xp
->flags
= p
->flags
;
970 xp
->family
= p
->sel
.family
;
971 /* XXX xp->share = p->share; */
974 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
976 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
977 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
978 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
979 p
->priority
= xp
->priority
;
980 p
->index
= xp
->index
;
981 p
->sel
.family
= xp
->family
;
983 p
->action
= xp
->action
;
984 p
->flags
= xp
->flags
;
985 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
988 static struct xfrm_policy
*xfrm_policy_construct(struct xfrm_userpolicy_info
*p
, struct rtattr
**xfrma
, int *errp
)
990 struct xfrm_policy
*xp
= xfrm_policy_alloc(GFP_KERNEL
);
998 copy_from_user_policy(xp
, p
);
1000 err
= copy_from_user_policy_type(&xp
->type
, xfrma
);
1004 if (!(err
= copy_from_user_tmpl(xp
, xfrma
)))
1005 err
= copy_from_user_sec_ctx(xp
, xfrma
);
1016 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1018 struct xfrm_userpolicy_info
*p
= NLMSG_DATA(nlh
);
1019 struct xfrm_policy
*xp
;
1024 err
= verify_newpolicy_info(p
);
1027 err
= verify_sec_ctx_len((struct rtattr
**)xfrma
);
1031 xp
= xfrm_policy_construct(p
, (struct rtattr
**)xfrma
, &err
);
1035 /* shouldnt excl be based on nlh flags??
1036 * Aha! this is anti-netlink really i.e more pfkey derived
1037 * in netlink excl is a flag and you wouldnt need
1038 * a type XFRM_MSG_UPDPOLICY - JHS */
1039 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1040 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1041 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1042 AUDIT_MAC_IPSEC_DELSPD
, err
? 0 : 1, xp
, NULL
);
1045 security_xfrm_policy_free(xp
);
1050 c
.event
= nlh
->nlmsg_type
;
1051 c
.seq
= nlh
->nlmsg_seq
;
1052 c
.pid
= nlh
->nlmsg_pid
;
1053 km_policy_notify(xp
, p
->dir
, &c
);
1060 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1062 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1065 if (xp
->xfrm_nr
== 0)
1068 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1069 struct xfrm_user_tmpl
*up
= &vec
[i
];
1070 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1072 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1073 up
->family
= kp
->encap_family
;
1074 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1075 up
->reqid
= kp
->reqid
;
1076 up
->mode
= kp
->mode
;
1077 up
->share
= kp
->share
;
1078 up
->optional
= kp
->optional
;
1079 up
->aalgos
= kp
->aalgos
;
1080 up
->ealgos
= kp
->ealgos
;
1081 up
->calgos
= kp
->calgos
;
1083 RTA_PUT(skb
, XFRMA_TMPL
,
1084 (sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
),
1093 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
1095 int ctx_size
= sizeof(struct xfrm_sec_ctx
) + s
->ctx_len
;
1096 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
1097 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1099 uctx
->exttype
= XFRMA_SEC_CTX
;
1100 uctx
->len
= ctx_size
;
1101 uctx
->ctx_doi
= s
->ctx_doi
;
1102 uctx
->ctx_alg
= s
->ctx_alg
;
1103 uctx
->ctx_len
= s
->ctx_len
;
1104 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
1111 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1114 return copy_sec_ctx(x
->security
, skb
);
1119 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1122 return copy_sec_ctx(xp
->security
, skb
);
1127 #ifdef CONFIG_XFRM_SUB_POLICY
1128 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1130 struct xfrm_userpolicy_type upt
;
1132 memset(&upt
, 0, sizeof(upt
));
1135 RTA_PUT(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1144 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1150 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1152 struct xfrm_dump_info
*sp
= ptr
;
1153 struct xfrm_userpolicy_info
*p
;
1154 struct sk_buff
*in_skb
= sp
->in_skb
;
1155 struct sk_buff
*skb
= sp
->out_skb
;
1156 struct nlmsghdr
*nlh
;
1157 unsigned char *b
= skb
->tail
;
1159 if (sp
->this_idx
< sp
->start_idx
)
1162 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
,
1164 XFRM_MSG_NEWPOLICY
, sizeof(*p
));
1165 p
= NLMSG_DATA(nlh
);
1166 nlh
->nlmsg_flags
= sp
->nlmsg_flags
;
1168 copy_to_user_policy(xp
, p
, dir
);
1169 if (copy_to_user_tmpl(xp
, skb
) < 0)
1171 if (copy_to_user_sec_ctx(xp
, skb
))
1173 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1176 nlh
->nlmsg_len
= skb
->tail
- b
;
1182 skb_trim(skb
, b
- skb
->data
);
1186 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1188 struct xfrm_dump_info info
;
1190 info
.in_skb
= cb
->skb
;
1192 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1193 info
.nlmsg_flags
= NLM_F_MULTI
;
1195 info
.start_idx
= cb
->args
[0];
1196 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN
, dump_one_policy
, &info
);
1197 #ifdef CONFIG_XFRM_SUB_POLICY
1198 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB
, dump_one_policy
, &info
);
1200 cb
->args
[0] = info
.this_idx
;
1205 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1206 struct xfrm_policy
*xp
,
1209 struct xfrm_dump_info info
;
1210 struct sk_buff
*skb
;
1212 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
1214 return ERR_PTR(-ENOMEM
);
1216 info
.in_skb
= in_skb
;
1218 info
.nlmsg_seq
= seq
;
1219 info
.nlmsg_flags
= 0;
1220 info
.this_idx
= info
.start_idx
= 0;
1222 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
1230 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1232 struct xfrm_policy
*xp
;
1233 struct xfrm_userpolicy_id
*p
;
1234 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1239 p
= NLMSG_DATA(nlh
);
1240 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1242 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1246 err
= verify_policy_dir(p
->dir
);
1251 xp
= xfrm_policy_byid(type
, p
->dir
, p
->index
, delete);
1253 struct rtattr
**rtattrs
= (struct rtattr
**)xfrma
;
1254 struct rtattr
*rt
= rtattrs
[XFRMA_SEC_CTX
-1];
1255 struct xfrm_policy tmp
;
1257 err
= verify_sec_ctx_len(rtattrs
);
1261 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
1263 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1265 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
1268 xp
= xfrm_policy_bysel_ctx(type
, p
->dir
, &p
->sel
, tmp
.security
, delete);
1269 security_xfrm_policy_free(&tmp
);
1272 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1273 AUDIT_MAC_IPSEC_DELSPD
, (xp
) ? 1 : 0, xp
, NULL
);
1279 struct sk_buff
*resp_skb
;
1281 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1282 if (IS_ERR(resp_skb
)) {
1283 err
= PTR_ERR(resp_skb
);
1285 err
= netlink_unicast(xfrm_nl
, resp_skb
,
1286 NETLINK_CB(skb
).pid
,
1290 if ((err
= security_xfrm_policy_delete(xp
)) != 0)
1292 c
.data
.byid
= p
->index
;
1293 c
.event
= nlh
->nlmsg_type
;
1294 c
.seq
= nlh
->nlmsg_seq
;
1295 c
.pid
= nlh
->nlmsg_pid
;
1296 km_policy_notify(xp
, p
->dir
, &c
);
1305 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1308 struct xfrm_usersa_flush
*p
= NLMSG_DATA(nlh
);
1309 struct xfrm_audit audit_info
;
1311 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1312 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1313 xfrm_state_flush(p
->proto
, &audit_info
);
1314 c
.data
.proto
= p
->proto
;
1315 c
.event
= nlh
->nlmsg_type
;
1316 c
.seq
= nlh
->nlmsg_seq
;
1317 c
.pid
= nlh
->nlmsg_pid
;
1318 km_state_notify(NULL
, &c
);
1324 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1326 struct xfrm_aevent_id
*id
;
1327 struct nlmsghdr
*nlh
;
1328 struct xfrm_lifetime_cur ltime
;
1329 unsigned char *b
= skb
->tail
;
1331 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
));
1332 id
= NLMSG_DATA(nlh
);
1333 nlh
->nlmsg_flags
= 0;
1335 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
,sizeof(x
->id
.daddr
));
1336 id
->sa_id
.spi
= x
->id
.spi
;
1337 id
->sa_id
.family
= x
->props
.family
;
1338 id
->sa_id
.proto
= x
->id
.proto
;
1339 memcpy(&id
->saddr
, &x
->props
.saddr
,sizeof(x
->props
.saddr
));
1340 id
->reqid
= x
->props
.reqid
;
1341 id
->flags
= c
->data
.aevent
;
1343 RTA_PUT(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
), &x
->replay
);
1345 ltime
.bytes
= x
->curlft
.bytes
;
1346 ltime
.packets
= x
->curlft
.packets
;
1347 ltime
.add_time
= x
->curlft
.add_time
;
1348 ltime
.use_time
= x
->curlft
.use_time
;
1350 RTA_PUT(skb
, XFRMA_LTIME_VAL
, sizeof(struct xfrm_lifetime_cur
), <ime
);
1352 if (id
->flags
&XFRM_AE_RTHR
) {
1353 RTA_PUT(skb
,XFRMA_REPLAY_THRESH
,sizeof(u32
),&x
->replay_maxdiff
);
1356 if (id
->flags
&XFRM_AE_ETHR
) {
1357 u32 etimer
= x
->replay_maxage
*10/HZ
;
1358 RTA_PUT(skb
,XFRMA_ETIMER_THRESH
,sizeof(u32
),&etimer
);
1361 nlh
->nlmsg_len
= skb
->tail
- b
;
1366 skb_trim(skb
, b
- skb
->data
);
1370 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1372 struct xfrm_state
*x
;
1373 struct sk_buff
*r_skb
;
1376 struct xfrm_aevent_id
*p
= NLMSG_DATA(nlh
);
1377 int len
= NLMSG_LENGTH(sizeof(struct xfrm_aevent_id
));
1378 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1380 len
+= RTA_SPACE(sizeof(struct xfrm_replay_state
));
1381 len
+= RTA_SPACE(sizeof(struct xfrm_lifetime_cur
));
1383 if (p
->flags
&XFRM_AE_RTHR
)
1384 len
+=RTA_SPACE(sizeof(u32
));
1386 if (p
->flags
&XFRM_AE_ETHR
)
1387 len
+=RTA_SPACE(sizeof(u32
));
1389 r_skb
= alloc_skb(len
, GFP_ATOMIC
);
1393 x
= xfrm_state_lookup(&id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1400 * XXX: is this lock really needed - none of the other
1401 * gets lock (the concern is things getting updated
1402 * while we are still reading) - jhs
1404 spin_lock_bh(&x
->lock
);
1405 c
.data
.aevent
= p
->flags
;
1406 c
.seq
= nlh
->nlmsg_seq
;
1407 c
.pid
= nlh
->nlmsg_pid
;
1409 if (build_aevent(r_skb
, x
, &c
) < 0)
1411 err
= netlink_unicast(xfrm_nl
, r_skb
,
1412 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
1413 spin_unlock_bh(&x
->lock
);
1418 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1420 struct xfrm_state
*x
;
1423 struct xfrm_aevent_id
*p
= NLMSG_DATA(nlh
);
1424 struct rtattr
*rp
= xfrma
[XFRMA_REPLAY_VAL
-1];
1425 struct rtattr
*lt
= xfrma
[XFRMA_LTIME_VAL
-1];
1430 /* pedantic mode - thou shalt sayeth replaceth */
1431 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1434 x
= xfrm_state_lookup(&p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1438 if (x
->km
.state
!= XFRM_STATE_VALID
)
1441 spin_lock_bh(&x
->lock
);
1442 err
= xfrm_update_ae_params(x
,(struct rtattr
**)xfrma
);
1443 spin_unlock_bh(&x
->lock
);
1447 c
.event
= nlh
->nlmsg_type
;
1448 c
.seq
= nlh
->nlmsg_seq
;
1449 c
.pid
= nlh
->nlmsg_pid
;
1450 c
.data
.aevent
= XFRM_AE_CU
;
1451 km_state_notify(x
, &c
);
1458 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1461 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1463 struct xfrm_audit audit_info
;
1465 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1469 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1470 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1471 xfrm_policy_flush(type
, &audit_info
);
1473 c
.event
= nlh
->nlmsg_type
;
1474 c
.seq
= nlh
->nlmsg_seq
;
1475 c
.pid
= nlh
->nlmsg_pid
;
1476 km_policy_notify(NULL
, 0, &c
);
1480 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1482 struct xfrm_policy
*xp
;
1483 struct xfrm_user_polexpire
*up
= NLMSG_DATA(nlh
);
1484 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1485 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1488 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1493 xp
= xfrm_policy_byid(type
, p
->dir
, p
->index
, 0);
1495 struct rtattr
**rtattrs
= (struct rtattr
**)xfrma
;
1496 struct rtattr
*rt
= rtattrs
[XFRMA_SEC_CTX
-1];
1497 struct xfrm_policy tmp
;
1499 err
= verify_sec_ctx_len(rtattrs
);
1503 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
1505 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1507 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
1510 xp
= xfrm_policy_bysel_ctx(type
, p
->dir
, &p
->sel
, tmp
.security
, 0);
1511 security_xfrm_policy_free(&tmp
);
1516 read_lock(&xp
->lock
);
1518 read_unlock(&xp
->lock
);
1522 read_unlock(&xp
->lock
);
1525 xfrm_policy_delete(xp
, p
->dir
);
1526 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1527 AUDIT_MAC_IPSEC_DELSPD
, 1, xp
, NULL
);
1530 // reset the timers here?
1531 printk("Dont know what to do with soft policy expire\n");
1533 km_policy_expired(xp
, p
->dir
, up
->hard
, current
->pid
);
1540 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1542 struct xfrm_state
*x
;
1544 struct xfrm_user_expire
*ue
= NLMSG_DATA(nlh
);
1545 struct xfrm_usersa_info
*p
= &ue
->state
;
1547 x
= xfrm_state_lookup(&p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
1555 spin_lock_bh(&x
->lock
);
1556 if (x
->km
.state
!= XFRM_STATE_VALID
)
1558 km_state_expired(x
, ue
->hard
, current
->pid
);
1561 __xfrm_state_delete(x
);
1562 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1563 AUDIT_MAC_IPSEC_DELSA
, 1, NULL
, x
);
1566 spin_unlock_bh(&x
->lock
);
1571 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1573 struct xfrm_policy
*xp
;
1574 struct xfrm_user_tmpl
*ut
;
1576 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
1578 struct xfrm_user_acquire
*ua
= NLMSG_DATA(nlh
);
1579 struct xfrm_state
*x
= xfrm_state_alloc();
1585 err
= verify_newpolicy_info(&ua
->policy
);
1587 printk("BAD policy passed\n");
1593 xp
= xfrm_policy_construct(&ua
->policy
, (struct rtattr
**) xfrma
, &err
);
1599 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
1600 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
1601 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
1604 /* extract the templates and for each call km_key */
1605 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
1606 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1607 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
1608 x
->props
.mode
= t
->mode
;
1609 x
->props
.reqid
= t
->reqid
;
1610 x
->props
.family
= ut
->family
;
1611 t
->aalgos
= ua
->aalgos
;
1612 t
->ealgos
= ua
->ealgos
;
1613 t
->calgos
= ua
->calgos
;
1614 err
= km_query(x
, t
, xp
);
1625 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1627 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
1628 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1629 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1630 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1631 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1632 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1633 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1634 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
1635 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
1636 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
1637 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1638 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1639 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
1640 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
1641 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = NLMSG_LENGTH(0),
1642 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
1643 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
1644 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
1649 static struct xfrm_link
{
1650 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, void **);
1651 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
1652 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
1653 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1654 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
1655 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
1656 .dump
= xfrm_dump_sa
},
1657 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1658 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
1659 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
1660 .dump
= xfrm_dump_policy
},
1661 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
1662 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
1663 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
1664 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1665 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1666 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
1667 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
1668 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
1669 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
1670 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
1673 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, int *errp
)
1675 struct rtattr
*xfrma
[XFRMA_MAX
];
1676 struct xfrm_link
*link
;
1679 if (!(nlh
->nlmsg_flags
& NLM_F_REQUEST
))
1682 type
= nlh
->nlmsg_type
;
1684 /* A control message: ignore them */
1685 if (type
< XFRM_MSG_BASE
)
1688 /* Unknown message: reply with EINVAL */
1689 if (type
> XFRM_MSG_MAX
)
1692 type
-= XFRM_MSG_BASE
;
1693 link
= &xfrm_dispatch
[type
];
1695 /* All operations require privileges, even GET */
1696 if (security_netlink_recv(skb
, CAP_NET_ADMIN
)) {
1701 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
1702 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
1703 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
1704 if (link
->dump
== NULL
)
1707 if ((*errp
= netlink_dump_start(xfrm_nl
, skb
, nlh
,
1708 link
->dump
, NULL
)) != 0) {
1712 netlink_queue_skip(nlh
, skb
);
1716 memset(xfrma
, 0, sizeof(xfrma
));
1718 if (nlh
->nlmsg_len
< (min_len
= xfrm_msg_min
[type
]))
1721 if (nlh
->nlmsg_len
> min_len
) {
1722 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
1723 struct rtattr
*attr
= (void *) nlh
+ NLMSG_ALIGN(min_len
);
1725 while (RTA_OK(attr
, attrlen
)) {
1726 unsigned short flavor
= attr
->rta_type
;
1728 if (flavor
> XFRMA_MAX
)
1730 xfrma
[flavor
- 1] = attr
;
1732 attr
= RTA_NEXT(attr
, attrlen
);
1736 if (link
->doit
== NULL
)
1738 *errp
= link
->doit(skb
, nlh
, (void **) &xfrma
);
1747 static void xfrm_netlink_rcv(struct sock
*sk
, int len
)
1749 unsigned int qlen
= 0;
1752 mutex_lock(&xfrm_cfg_mutex
);
1753 netlink_run_queue(sk
, &qlen
, &xfrm_user_rcv_msg
);
1754 mutex_unlock(&xfrm_cfg_mutex
);
1759 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1761 struct xfrm_user_expire
*ue
;
1762 struct nlmsghdr
*nlh
;
1763 unsigned char *b
= skb
->tail
;
1765 nlh
= NLMSG_PUT(skb
, c
->pid
, 0, XFRM_MSG_EXPIRE
,
1767 ue
= NLMSG_DATA(nlh
);
1768 nlh
->nlmsg_flags
= 0;
1770 copy_to_user_state(x
, &ue
->state
);
1771 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
1773 nlh
->nlmsg_len
= skb
->tail
- b
;
1777 skb_trim(skb
, b
- skb
->data
);
1781 static int xfrm_exp_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1783 struct sk_buff
*skb
;
1784 int len
= NLMSG_LENGTH(sizeof(struct xfrm_user_expire
));
1786 skb
= alloc_skb(len
, GFP_ATOMIC
);
1790 if (build_expire(skb
, x
, c
) < 0)
1793 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
1794 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
1797 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1799 struct sk_buff
*skb
;
1800 int len
= NLMSG_LENGTH(sizeof(struct xfrm_aevent_id
));
1802 len
+= RTA_SPACE(sizeof(struct xfrm_replay_state
));
1803 len
+= RTA_SPACE(sizeof(struct xfrm_lifetime_cur
));
1804 skb
= alloc_skb(len
, GFP_ATOMIC
);
1808 if (build_aevent(skb
, x
, c
) < 0)
1811 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_AEVENTS
;
1812 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
1815 static int xfrm_notify_sa_flush(struct km_event
*c
)
1817 struct xfrm_usersa_flush
*p
;
1818 struct nlmsghdr
*nlh
;
1819 struct sk_buff
*skb
;
1821 int len
= NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush
));
1823 skb
= alloc_skb(len
, GFP_ATOMIC
);
1828 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
,
1829 XFRM_MSG_FLUSHSA
, sizeof(*p
));
1830 nlh
->nlmsg_flags
= 0;
1832 p
= NLMSG_DATA(nlh
);
1833 p
->proto
= c
->data
.proto
;
1835 nlh
->nlmsg_len
= skb
->tail
- b
;
1837 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
1838 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
1845 static int inline xfrm_sa_len(struct xfrm_state
*x
)
1849 l
+= RTA_SPACE(sizeof(*x
->aalg
) + (x
->aalg
->alg_key_len
+7)/8);
1851 l
+= RTA_SPACE(sizeof(*x
->ealg
) + (x
->ealg
->alg_key_len
+7)/8);
1853 l
+= RTA_SPACE(sizeof(*x
->calg
));
1855 l
+= RTA_SPACE(sizeof(*x
->encap
));
1860 static int xfrm_notify_sa(struct xfrm_state
*x
, struct km_event
*c
)
1862 struct xfrm_usersa_info
*p
;
1863 struct xfrm_usersa_id
*id
;
1864 struct nlmsghdr
*nlh
;
1865 struct sk_buff
*skb
;
1867 int len
= xfrm_sa_len(x
);
1870 headlen
= sizeof(*p
);
1871 if (c
->event
== XFRM_MSG_DELSA
) {
1872 len
+= RTA_SPACE(headlen
);
1873 headlen
= sizeof(*id
);
1875 len
+= NLMSG_SPACE(headlen
);
1877 skb
= alloc_skb(len
, GFP_ATOMIC
);
1882 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, c
->event
, headlen
);
1883 nlh
->nlmsg_flags
= 0;
1885 p
= NLMSG_DATA(nlh
);
1886 if (c
->event
== XFRM_MSG_DELSA
) {
1887 id
= NLMSG_DATA(nlh
);
1888 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
1889 id
->spi
= x
->id
.spi
;
1890 id
->family
= x
->props
.family
;
1891 id
->proto
= x
->id
.proto
;
1893 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_SA
, sizeof(*p
)));
1896 copy_to_user_state(x
, p
);
1899 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
1900 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
1902 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
1903 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
1905 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
1908 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
1910 nlh
->nlmsg_len
= skb
->tail
- b
;
1912 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
1913 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
1921 static int xfrm_send_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1925 case XFRM_MSG_EXPIRE
:
1926 return xfrm_exp_state_notify(x
, c
);
1927 case XFRM_MSG_NEWAE
:
1928 return xfrm_aevent_state_notify(x
, c
);
1929 case XFRM_MSG_DELSA
:
1930 case XFRM_MSG_UPDSA
:
1931 case XFRM_MSG_NEWSA
:
1932 return xfrm_notify_sa(x
, c
);
1933 case XFRM_MSG_FLUSHSA
:
1934 return xfrm_notify_sa_flush(c
);
1936 printk("xfrm_user: Unknown SA event %d\n", c
->event
);
1944 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
1945 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
1948 struct xfrm_user_acquire
*ua
;
1949 struct nlmsghdr
*nlh
;
1950 unsigned char *b
= skb
->tail
;
1951 __u32 seq
= xfrm_get_acqseq();
1953 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_ACQUIRE
,
1955 ua
= NLMSG_DATA(nlh
);
1956 nlh
->nlmsg_flags
= 0;
1958 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
1959 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
1960 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
1961 copy_to_user_policy(xp
, &ua
->policy
, dir
);
1962 ua
->aalgos
= xt
->aalgos
;
1963 ua
->ealgos
= xt
->ealgos
;
1964 ua
->calgos
= xt
->calgos
;
1965 ua
->seq
= x
->km
.seq
= seq
;
1967 if (copy_to_user_tmpl(xp
, skb
) < 0)
1969 if (copy_to_user_state_sec_ctx(x
, skb
))
1971 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1974 nlh
->nlmsg_len
= skb
->tail
- b
;
1978 skb_trim(skb
, b
- skb
->data
);
1982 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
1983 struct xfrm_policy
*xp
, int dir
)
1985 struct sk_buff
*skb
;
1988 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
1989 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_acquire
));
1990 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
));
1991 #ifdef CONFIG_XFRM_SUB_POLICY
1992 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
1994 skb
= alloc_skb(len
, GFP_ATOMIC
);
1998 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
2001 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_ACQUIRE
;
2002 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
2005 /* User gives us xfrm_user_policy_info followed by an array of 0
2006 * or more templates.
2008 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2009 u8
*data
, int len
, int *dir
)
2011 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2012 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2013 struct xfrm_policy
*xp
;
2016 switch (sk
->sk_family
) {
2018 if (opt
!= IP_XFRM_POLICY
) {
2023 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2025 if (opt
!= IPV6_XFRM_POLICY
) {
2038 if (len
< sizeof(*p
) ||
2039 verify_newpolicy_info(p
))
2042 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2043 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2046 if (p
->dir
> XFRM_POLICY_OUT
)
2049 xp
= xfrm_policy_alloc(GFP_KERNEL
);
2055 copy_from_user_policy(xp
, p
);
2056 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2057 copy_templates(xp
, ut
, nr
);
2064 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2065 int dir
, struct km_event
*c
)
2067 struct xfrm_user_polexpire
*upe
;
2068 struct nlmsghdr
*nlh
;
2069 int hard
= c
->data
.hard
;
2070 unsigned char *b
= skb
->tail
;
2072 nlh
= NLMSG_PUT(skb
, c
->pid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
));
2073 upe
= NLMSG_DATA(nlh
);
2074 nlh
->nlmsg_flags
= 0;
2076 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2077 if (copy_to_user_tmpl(xp
, skb
) < 0)
2079 if (copy_to_user_sec_ctx(xp
, skb
))
2081 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2085 nlh
->nlmsg_len
= skb
->tail
- b
;
2089 skb_trim(skb
, b
- skb
->data
);
2093 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2095 struct sk_buff
*skb
;
2098 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2099 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_polexpire
));
2100 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
));
2101 #ifdef CONFIG_XFRM_SUB_POLICY
2102 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2104 skb
= alloc_skb(len
, GFP_ATOMIC
);
2108 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2111 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
2112 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2115 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2117 struct xfrm_userpolicy_info
*p
;
2118 struct xfrm_userpolicy_id
*id
;
2119 struct nlmsghdr
*nlh
;
2120 struct sk_buff
*skb
;
2122 int len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2125 headlen
= sizeof(*p
);
2126 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2127 len
+= RTA_SPACE(headlen
);
2128 headlen
= sizeof(*id
);
2130 #ifdef CONFIG_XFRM_SUB_POLICY
2131 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2133 len
+= NLMSG_SPACE(headlen
);
2135 skb
= alloc_skb(len
, GFP_ATOMIC
);
2140 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, c
->event
, headlen
);
2142 p
= NLMSG_DATA(nlh
);
2143 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2144 id
= NLMSG_DATA(nlh
);
2145 memset(id
, 0, sizeof(*id
));
2148 id
->index
= xp
->index
;
2150 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2152 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_POLICY
, sizeof(*p
)));
2155 nlh
->nlmsg_flags
= 0;
2157 copy_to_user_policy(xp
, p
, dir
);
2158 if (copy_to_user_tmpl(xp
, skb
) < 0)
2160 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2163 nlh
->nlmsg_len
= skb
->tail
- b
;
2165 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
2166 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2174 static int xfrm_notify_policy_flush(struct km_event
*c
)
2176 struct nlmsghdr
*nlh
;
2177 struct sk_buff
*skb
;
2180 #ifdef CONFIG_XFRM_SUB_POLICY
2181 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2183 len
+= NLMSG_LENGTH(0);
2185 skb
= alloc_skb(len
, GFP_ATOMIC
);
2191 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0);
2192 nlh
->nlmsg_flags
= 0;
2193 if (copy_to_user_policy_type(c
->data
.type
, skb
) < 0)
2196 nlh
->nlmsg_len
= skb
->tail
- b
;
2198 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
2199 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2206 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2210 case XFRM_MSG_NEWPOLICY
:
2211 case XFRM_MSG_UPDPOLICY
:
2212 case XFRM_MSG_DELPOLICY
:
2213 return xfrm_notify_policy(xp
, dir
, c
);
2214 case XFRM_MSG_FLUSHPOLICY
:
2215 return xfrm_notify_policy_flush(c
);
2216 case XFRM_MSG_POLEXPIRE
:
2217 return xfrm_exp_policy_notify(xp
, dir
, c
);
2219 printk("xfrm_user: Unknown Policy event %d\n", c
->event
);
2226 static int build_report(struct sk_buff
*skb
, u8 proto
,
2227 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2229 struct xfrm_user_report
*ur
;
2230 struct nlmsghdr
*nlh
;
2231 unsigned char *b
= skb
->tail
;
2233 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
));
2234 ur
= NLMSG_DATA(nlh
);
2235 nlh
->nlmsg_flags
= 0;
2238 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2241 RTA_PUT(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2243 nlh
->nlmsg_len
= skb
->tail
- b
;
2248 skb_trim(skb
, b
- skb
->data
);
2252 static int xfrm_send_report(u8 proto
, struct xfrm_selector
*sel
,
2253 xfrm_address_t
*addr
)
2255 struct sk_buff
*skb
;
2258 len
= NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report
)));
2259 skb
= alloc_skb(len
, GFP_ATOMIC
);
2263 if (build_report(skb
, proto
, sel
, addr
) < 0)
2266 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_REPORT
;
2267 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2270 static struct xfrm_mgr netlink_mgr
= {
2272 .notify
= xfrm_send_state_notify
,
2273 .acquire
= xfrm_send_acquire
,
2274 .compile_policy
= xfrm_compile_policy
,
2275 .notify_policy
= xfrm_send_policy_notify
,
2276 .report
= xfrm_send_report
,
2279 static int __init
xfrm_user_init(void)
2283 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
2285 nlsk
= netlink_kernel_create(NETLINK_XFRM
, XFRMNLGRP_MAX
,
2286 xfrm_netlink_rcv
, THIS_MODULE
);
2289 rcu_assign_pointer(xfrm_nl
, nlsk
);
2291 xfrm_register_km(&netlink_mgr
);
2296 static void __exit
xfrm_user_exit(void)
2298 struct sock
*nlsk
= xfrm_nl
;
2300 xfrm_unregister_km(&netlink_mgr
);
2301 rcu_assign_pointer(xfrm_nl
, NULL
);
2303 sock_release(nlsk
->sk_socket
);
2306 module_init(xfrm_user_init
);
2307 module_exit(xfrm_user_exit
);
2308 MODULE_LICENSE("GPL");
2309 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);