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>
35 static int verify_one_alg(struct rtattr
**xfrma
, enum xfrm_attr_type_t type
)
37 struct rtattr
*rt
= xfrma
[type
- 1];
38 struct xfrm_algo
*algp
;
44 len
= (rt
->rta_len
- sizeof(*rt
)) - sizeof(*algp
);
50 len
-= (algp
->alg_key_len
+ 7U) / 8;
56 if (!algp
->alg_key_len
&&
57 strcmp(algp
->alg_name
, "digest_null") != 0)
62 if (!algp
->alg_key_len
&&
63 strcmp(algp
->alg_name
, "cipher_null") != 0)
68 /* Zero length keys are legal. */
75 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
79 static int verify_encap_tmpl(struct rtattr
**xfrma
)
81 struct rtattr
*rt
= xfrma
[XFRMA_ENCAP
- 1];
82 struct xfrm_encap_tmpl
*encap
;
87 if ((rt
->rta_len
- sizeof(*rt
)) < sizeof(*encap
))
93 static int verify_one_addr(struct rtattr
**xfrma
, enum xfrm_attr_type_t type
,
94 xfrm_address_t
**addrp
)
96 struct rtattr
*rt
= xfrma
[type
- 1];
101 if ((rt
->rta_len
- sizeof(*rt
)) < sizeof(**addrp
))
105 *addrp
= RTA_DATA(rt
);
110 static inline int verify_sec_ctx_len(struct rtattr
**xfrma
)
112 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
- 1];
113 struct xfrm_user_sec_ctx
*uctx
;
119 if (rt
->rta_len
< sizeof(*uctx
))
124 len
+= sizeof(struct xfrm_user_sec_ctx
);
125 len
+= uctx
->ctx_len
;
127 if (uctx
->len
!= len
)
134 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
135 struct rtattr
**xfrma
)
145 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
157 switch (p
->id
.proto
) {
159 if (!xfrma
[XFRMA_ALG_AUTH
-1] ||
160 xfrma
[XFRMA_ALG_CRYPT
-1] ||
161 xfrma
[XFRMA_ALG_COMP
-1])
166 if ((!xfrma
[XFRMA_ALG_AUTH
-1] &&
167 !xfrma
[XFRMA_ALG_CRYPT
-1]) ||
168 xfrma
[XFRMA_ALG_COMP
-1])
173 if (!xfrma
[XFRMA_ALG_COMP
-1] ||
174 xfrma
[XFRMA_ALG_AUTH
-1] ||
175 xfrma
[XFRMA_ALG_CRYPT
-1])
179 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
180 case IPPROTO_DSTOPTS
:
181 case IPPROTO_ROUTING
:
182 if (xfrma
[XFRMA_ALG_COMP
-1] ||
183 xfrma
[XFRMA_ALG_AUTH
-1] ||
184 xfrma
[XFRMA_ALG_CRYPT
-1] ||
185 xfrma
[XFRMA_ENCAP
-1] ||
186 xfrma
[XFRMA_SEC_CTX
-1] ||
187 !xfrma
[XFRMA_COADDR
-1])
196 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_AUTH
)))
198 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_CRYPT
)))
200 if ((err
= verify_one_alg(xfrma
, XFRMA_ALG_COMP
)))
202 if ((err
= verify_encap_tmpl(xfrma
)))
204 if ((err
= verify_sec_ctx_len(xfrma
)))
206 if ((err
= verify_one_addr(xfrma
, XFRMA_COADDR
, NULL
)))
211 case XFRM_MODE_TRANSPORT
:
212 case XFRM_MODE_TUNNEL
:
213 case XFRM_MODE_ROUTEOPTIMIZATION
:
227 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
228 struct xfrm_algo_desc
*(*get_byname
)(char *, int),
229 struct rtattr
*u_arg
)
231 struct rtattr
*rta
= u_arg
;
232 struct xfrm_algo
*p
, *ualg
;
233 struct xfrm_algo_desc
*algo
;
239 ualg
= RTA_DATA(rta
);
241 algo
= get_byname(ualg
->alg_name
, 1);
244 *props
= algo
->desc
.sadb_alg_id
;
246 len
= sizeof(*ualg
) + (ualg
->alg_key_len
+ 7U) / 8;
247 p
= kmemdup(ualg
, len
, GFP_KERNEL
);
251 strcpy(p
->alg_name
, algo
->name
);
256 static int attach_encap_tmpl(struct xfrm_encap_tmpl
**encapp
, struct rtattr
*u_arg
)
258 struct rtattr
*rta
= u_arg
;
259 struct xfrm_encap_tmpl
*p
, *uencap
;
264 uencap
= RTA_DATA(rta
);
265 p
= kmemdup(uencap
, sizeof(*p
), GFP_KERNEL
);
274 static inline int xfrm_user_sec_ctx_size(struct xfrm_policy
*xp
)
276 struct xfrm_sec_ctx
*xfrm_ctx
= xp
->security
;
280 len
+= sizeof(struct xfrm_user_sec_ctx
);
281 len
+= xfrm_ctx
->ctx_len
;
286 static int attach_sec_ctx(struct xfrm_state
*x
, struct rtattr
*u_arg
)
288 struct xfrm_user_sec_ctx
*uctx
;
293 uctx
= RTA_DATA(u_arg
);
294 return security_xfrm_state_alloc(x
, uctx
);
297 static int attach_one_addr(xfrm_address_t
**addrpp
, struct rtattr
*u_arg
)
299 struct rtattr
*rta
= u_arg
;
300 xfrm_address_t
*p
, *uaddrp
;
305 uaddrp
= RTA_DATA(rta
);
306 p
= kmemdup(uaddrp
, sizeof(*p
), GFP_KERNEL
);
314 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
316 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
317 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
318 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
319 x
->props
.mode
= p
->mode
;
320 x
->props
.replay_window
= p
->replay_window
;
321 x
->props
.reqid
= p
->reqid
;
322 x
->props
.family
= p
->family
;
323 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
324 x
->props
.flags
= p
->flags
;
328 * someday when pfkey also has support, we could have the code
329 * somehow made shareable and move it to xfrm_state.c - JHS
332 static int xfrm_update_ae_params(struct xfrm_state
*x
, struct rtattr
**xfrma
)
335 struct rtattr
*rp
= xfrma
[XFRMA_REPLAY_VAL
-1];
336 struct rtattr
*lt
= xfrma
[XFRMA_LTIME_VAL
-1];
337 struct rtattr
*et
= xfrma
[XFRMA_ETIMER_THRESH
-1];
338 struct rtattr
*rt
= xfrma
[XFRMA_REPLAY_THRESH
-1];
341 struct xfrm_replay_state
*replay
;
342 if (RTA_PAYLOAD(rp
) < sizeof(*replay
))
344 replay
= RTA_DATA(rp
);
345 memcpy(&x
->replay
, replay
, sizeof(*replay
));
346 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
350 struct xfrm_lifetime_cur
*ltime
;
351 if (RTA_PAYLOAD(lt
) < sizeof(*ltime
))
353 ltime
= RTA_DATA(lt
);
354 x
->curlft
.bytes
= ltime
->bytes
;
355 x
->curlft
.packets
= ltime
->packets
;
356 x
->curlft
.add_time
= ltime
->add_time
;
357 x
->curlft
.use_time
= ltime
->use_time
;
361 if (RTA_PAYLOAD(et
) < sizeof(u32
))
363 x
->replay_maxage
= *(u32
*)RTA_DATA(et
);
367 if (RTA_PAYLOAD(rt
) < sizeof(u32
))
369 x
->replay_maxdiff
= *(u32
*)RTA_DATA(rt
);
377 static struct xfrm_state
*xfrm_state_construct(struct xfrm_usersa_info
*p
,
378 struct rtattr
**xfrma
,
381 struct xfrm_state
*x
= xfrm_state_alloc();
387 copy_from_user_state(x
, p
);
389 if ((err
= attach_one_algo(&x
->aalg
, &x
->props
.aalgo
,
390 xfrm_aalg_get_byname
,
391 xfrma
[XFRMA_ALG_AUTH
-1])))
393 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
394 xfrm_ealg_get_byname
,
395 xfrma
[XFRMA_ALG_CRYPT
-1])))
397 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
398 xfrm_calg_get_byname
,
399 xfrma
[XFRMA_ALG_COMP
-1])))
401 if ((err
= attach_encap_tmpl(&x
->encap
, xfrma
[XFRMA_ENCAP
-1])))
403 if ((err
= attach_one_addr(&x
->coaddr
, xfrma
[XFRMA_COADDR
-1])))
405 err
= xfrm_init_state(x
);
409 if ((err
= attach_sec_ctx(x
, xfrma
[XFRMA_SEC_CTX
-1])))
413 x
->replay_maxdiff
= sysctl_xfrm_aevent_rseqth
;
414 /* sysctl_xfrm_aevent_etime is in 100ms units */
415 x
->replay_maxage
= (sysctl_xfrm_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
416 x
->preplay
.bitmap
= 0;
417 x
->preplay
.seq
= x
->replay
.seq
+x
->replay_maxdiff
;
418 x
->preplay
.oseq
= x
->replay
.oseq
+x
->replay_maxdiff
;
420 /* override default values from above */
422 err
= xfrm_update_ae_params(x
, (struct rtattr
**)xfrma
);
429 x
->km
.state
= XFRM_STATE_DEAD
;
436 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
438 struct xfrm_usersa_info
*p
= NLMSG_DATA(nlh
);
439 struct xfrm_state
*x
;
443 err
= verify_newsa_info(p
, (struct rtattr
**)xfrma
);
447 x
= xfrm_state_construct(p
, (struct rtattr
**)xfrma
, &err
);
452 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
453 err
= xfrm_state_add(x
);
455 err
= xfrm_state_update(x
);
458 x
->km
.state
= XFRM_STATE_DEAD
;
463 c
.seq
= nlh
->nlmsg_seq
;
464 c
.pid
= nlh
->nlmsg_pid
;
465 c
.event
= nlh
->nlmsg_type
;
467 km_state_notify(x
, &c
);
473 static struct xfrm_state
*xfrm_user_state_lookup(struct xfrm_usersa_id
*p
,
474 struct rtattr
**xfrma
,
477 struct xfrm_state
*x
= NULL
;
480 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
482 x
= xfrm_state_lookup(&p
->daddr
, p
->spi
, p
->proto
, p
->family
);
484 xfrm_address_t
*saddr
= NULL
;
486 err
= verify_one_addr(xfrma
, XFRMA_SRCADDR
, &saddr
);
496 x
= xfrm_state_lookup_byaddr(&p
->daddr
, saddr
, p
->proto
,
506 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
508 struct xfrm_state
*x
;
511 struct xfrm_usersa_id
*p
= NLMSG_DATA(nlh
);
513 x
= xfrm_user_state_lookup(p
, (struct rtattr
**)xfrma
, &err
);
517 if ((err
= security_xfrm_state_delete(x
)) != 0)
520 if (xfrm_state_kern(x
)) {
525 err
= xfrm_state_delete(x
);
529 c
.seq
= nlh
->nlmsg_seq
;
530 c
.pid
= nlh
->nlmsg_pid
;
531 c
.event
= nlh
->nlmsg_type
;
532 km_state_notify(x
, &c
);
539 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
541 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
542 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
543 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
544 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
545 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
546 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
547 p
->mode
= x
->props
.mode
;
548 p
->replay_window
= x
->props
.replay_window
;
549 p
->reqid
= x
->props
.reqid
;
550 p
->family
= x
->props
.family
;
551 p
->flags
= x
->props
.flags
;
555 struct xfrm_dump_info
{
556 struct sk_buff
*in_skb
;
557 struct sk_buff
*out_skb
;
564 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
566 struct xfrm_dump_info
*sp
= ptr
;
567 struct sk_buff
*in_skb
= sp
->in_skb
;
568 struct sk_buff
*skb
= sp
->out_skb
;
569 struct xfrm_usersa_info
*p
;
570 struct nlmsghdr
*nlh
;
571 unsigned char *b
= skb
->tail
;
573 if (sp
->this_idx
< sp
->start_idx
)
576 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
,
578 XFRM_MSG_NEWSA
, sizeof(*p
));
579 nlh
->nlmsg_flags
= sp
->nlmsg_flags
;
582 copy_to_user_state(x
, p
);
585 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
586 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
588 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
589 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
591 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
594 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
597 int ctx_size
= sizeof(struct xfrm_sec_ctx
) +
598 x
->security
->ctx_len
;
599 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
600 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
602 uctx
->exttype
= XFRMA_SEC_CTX
;
603 uctx
->len
= ctx_size
;
604 uctx
->ctx_doi
= x
->security
->ctx_doi
;
605 uctx
->ctx_alg
= x
->security
->ctx_alg
;
606 uctx
->ctx_len
= x
->security
->ctx_len
;
607 memcpy(uctx
+ 1, x
->security
->ctx_str
, x
->security
->ctx_len
);
611 RTA_PUT(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
614 RTA_PUT(skb
, XFRMA_LASTUSED
, sizeof(x
->lastused
), &x
->lastused
);
616 nlh
->nlmsg_len
= skb
->tail
- b
;
623 skb_trim(skb
, b
- skb
->data
);
627 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
629 struct xfrm_dump_info info
;
631 info
.in_skb
= cb
->skb
;
633 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
634 info
.nlmsg_flags
= NLM_F_MULTI
;
636 info
.start_idx
= cb
->args
[0];
637 (void) xfrm_state_walk(0, dump_one_state
, &info
);
638 cb
->args
[0] = info
.this_idx
;
643 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
644 struct xfrm_state
*x
, u32 seq
)
646 struct xfrm_dump_info info
;
649 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
651 return ERR_PTR(-ENOMEM
);
653 info
.in_skb
= in_skb
;
655 info
.nlmsg_seq
= seq
;
656 info
.nlmsg_flags
= 0;
657 info
.this_idx
= info
.start_idx
= 0;
659 if (dump_one_state(x
, 0, &info
)) {
667 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
669 struct xfrm_usersa_id
*p
= NLMSG_DATA(nlh
);
670 struct xfrm_state
*x
;
671 struct sk_buff
*resp_skb
;
674 x
= xfrm_user_state_lookup(p
, (struct rtattr
**)xfrma
, &err
);
678 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
679 if (IS_ERR(resp_skb
)) {
680 err
= PTR_ERR(resp_skb
);
682 err
= netlink_unicast(xfrm_nl
, resp_skb
,
683 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
690 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
692 switch (p
->info
.id
.proto
) {
698 /* IPCOMP spi is 16-bits. */
699 if (p
->max
>= 0x10000)
713 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
715 struct xfrm_state
*x
;
716 struct xfrm_userspi_info
*p
;
717 struct sk_buff
*resp_skb
;
718 xfrm_address_t
*daddr
;
723 err
= verify_userspi_info(p
);
727 family
= p
->info
.family
;
728 daddr
= &p
->info
.id
.daddr
;
732 x
= xfrm_find_acq_byseq(p
->info
.seq
);
733 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
740 x
= xfrm_find_acq(p
->info
.mode
, p
->info
.reqid
,
741 p
->info
.id
.proto
, daddr
,
748 resp_skb
= ERR_PTR(-ENOENT
);
750 spin_lock_bh(&x
->lock
);
751 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
752 xfrm_alloc_spi(x
, htonl(p
->min
), htonl(p
->max
));
754 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
756 spin_unlock_bh(&x
->lock
);
758 if (IS_ERR(resp_skb
)) {
759 err
= PTR_ERR(resp_skb
);
763 err
= netlink_unicast(xfrm_nl
, resp_skb
,
764 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
772 static int verify_policy_dir(__u8 dir
)
776 case XFRM_POLICY_OUT
:
777 case XFRM_POLICY_FWD
:
787 static int verify_policy_type(__u8 type
)
790 case XFRM_POLICY_TYPE_MAIN
:
791 #ifdef CONFIG_XFRM_SUB_POLICY
792 case XFRM_POLICY_TYPE_SUB
:
803 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
807 case XFRM_SHARE_SESSION
:
808 case XFRM_SHARE_USER
:
809 case XFRM_SHARE_UNIQUE
:
817 case XFRM_POLICY_ALLOW
:
818 case XFRM_POLICY_BLOCK
:
825 switch (p
->sel
.family
) {
830 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
833 return -EAFNOSUPPORT
;
840 return verify_policy_dir(p
->dir
);
843 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
845 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
-1];
846 struct xfrm_user_sec_ctx
*uctx
;
852 return security_xfrm_policy_alloc(pol
, uctx
);
855 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
861 for (i
= 0; i
< nr
; i
++, ut
++) {
862 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
864 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
865 memcpy(&t
->saddr
, &ut
->saddr
,
866 sizeof(xfrm_address_t
));
867 t
->reqid
= ut
->reqid
;
869 t
->share
= ut
->share
;
870 t
->optional
= ut
->optional
;
871 t
->aalgos
= ut
->aalgos
;
872 t
->ealgos
= ut
->ealgos
;
873 t
->calgos
= ut
->calgos
;
877 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
879 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
880 struct xfrm_user_tmpl
*utmpl
;
886 nr
= (rt
->rta_len
- sizeof(*rt
)) / sizeof(*utmpl
);
888 if (nr
> XFRM_MAX_DEPTH
)
891 copy_templates(pol
, RTA_DATA(rt
), nr
);
896 static int copy_from_user_policy_type(u8
*tp
, struct rtattr
**xfrma
)
898 struct rtattr
*rt
= xfrma
[XFRMA_POLICY_TYPE
-1];
899 struct xfrm_userpolicy_type
*upt
;
900 __u8 type
= XFRM_POLICY_TYPE_MAIN
;
904 if (rt
->rta_len
< sizeof(*upt
))
911 err
= verify_policy_type(type
);
919 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
921 xp
->priority
= p
->priority
;
922 xp
->index
= p
->index
;
923 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
924 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
925 xp
->action
= p
->action
;
926 xp
->flags
= p
->flags
;
927 xp
->family
= p
->sel
.family
;
928 /* XXX xp->share = p->share; */
931 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
933 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
934 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
935 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
936 p
->priority
= xp
->priority
;
937 p
->index
= xp
->index
;
938 p
->sel
.family
= xp
->family
;
940 p
->action
= xp
->action
;
941 p
->flags
= xp
->flags
;
942 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
945 static struct xfrm_policy
*xfrm_policy_construct(struct xfrm_userpolicy_info
*p
, struct rtattr
**xfrma
, int *errp
)
947 struct xfrm_policy
*xp
= xfrm_policy_alloc(GFP_KERNEL
);
955 copy_from_user_policy(xp
, p
);
957 err
= copy_from_user_policy_type(&xp
->type
, xfrma
);
961 if (!(err
= copy_from_user_tmpl(xp
, xfrma
)))
962 err
= copy_from_user_sec_ctx(xp
, xfrma
);
973 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
975 struct xfrm_userpolicy_info
*p
= NLMSG_DATA(nlh
);
976 struct xfrm_policy
*xp
;
981 err
= verify_newpolicy_info(p
);
984 err
= verify_sec_ctx_len((struct rtattr
**)xfrma
);
988 xp
= xfrm_policy_construct(p
, (struct rtattr
**)xfrma
, &err
);
992 /* shouldnt excl be based on nlh flags??
993 * Aha! this is anti-netlink really i.e more pfkey derived
994 * in netlink excl is a flag and you wouldnt need
995 * a type XFRM_MSG_UPDPOLICY - JHS */
996 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
997 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
999 security_xfrm_policy_free(xp
);
1004 c
.event
= nlh
->nlmsg_type
;
1005 c
.seq
= nlh
->nlmsg_seq
;
1006 c
.pid
= nlh
->nlmsg_pid
;
1007 km_policy_notify(xp
, p
->dir
, &c
);
1014 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1016 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1019 if (xp
->xfrm_nr
== 0)
1022 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1023 struct xfrm_user_tmpl
*up
= &vec
[i
];
1024 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1026 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1027 up
->family
= xp
->family
;
1028 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1029 up
->reqid
= kp
->reqid
;
1030 up
->mode
= kp
->mode
;
1031 up
->share
= kp
->share
;
1032 up
->optional
= kp
->optional
;
1033 up
->aalgos
= kp
->aalgos
;
1034 up
->ealgos
= kp
->ealgos
;
1035 up
->calgos
= kp
->calgos
;
1037 RTA_PUT(skb
, XFRMA_TMPL
,
1038 (sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
),
1047 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
1049 int ctx_size
= sizeof(struct xfrm_sec_ctx
) + s
->ctx_len
;
1050 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
1051 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1053 uctx
->exttype
= XFRMA_SEC_CTX
;
1054 uctx
->len
= ctx_size
;
1055 uctx
->ctx_doi
= s
->ctx_doi
;
1056 uctx
->ctx_alg
= s
->ctx_alg
;
1057 uctx
->ctx_len
= s
->ctx_len
;
1058 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
1065 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1068 return copy_sec_ctx(x
->security
, skb
);
1073 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1076 return copy_sec_ctx(xp
->security
, skb
);
1081 #ifdef CONFIG_XFRM_SUB_POLICY
1082 static int copy_to_user_policy_type(__u8 type
, struct sk_buff
*skb
)
1084 struct xfrm_userpolicy_type upt
;
1086 memset(&upt
, 0, sizeof(upt
));
1089 RTA_PUT(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1098 static inline int copy_to_user_policy_type(__u8 type
, struct sk_buff
*skb
)
1104 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1106 struct xfrm_dump_info
*sp
= ptr
;
1107 struct xfrm_userpolicy_info
*p
;
1108 struct sk_buff
*in_skb
= sp
->in_skb
;
1109 struct sk_buff
*skb
= sp
->out_skb
;
1110 struct nlmsghdr
*nlh
;
1111 unsigned char *b
= skb
->tail
;
1113 if (sp
->this_idx
< sp
->start_idx
)
1116 nlh
= NLMSG_PUT(skb
, NETLINK_CB(in_skb
).pid
,
1118 XFRM_MSG_NEWPOLICY
, sizeof(*p
));
1119 p
= NLMSG_DATA(nlh
);
1120 nlh
->nlmsg_flags
= sp
->nlmsg_flags
;
1122 copy_to_user_policy(xp
, p
, dir
);
1123 if (copy_to_user_tmpl(xp
, skb
) < 0)
1125 if (copy_to_user_sec_ctx(xp
, skb
))
1127 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1130 nlh
->nlmsg_len
= skb
->tail
- b
;
1136 skb_trim(skb
, b
- skb
->data
);
1140 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1142 struct xfrm_dump_info info
;
1144 info
.in_skb
= cb
->skb
;
1146 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1147 info
.nlmsg_flags
= NLM_F_MULTI
;
1149 info
.start_idx
= cb
->args
[0];
1150 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN
, dump_one_policy
, &info
);
1151 #ifdef CONFIG_XFRM_SUB_POLICY
1152 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB
, dump_one_policy
, &info
);
1154 cb
->args
[0] = info
.this_idx
;
1159 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1160 struct xfrm_policy
*xp
,
1163 struct xfrm_dump_info info
;
1164 struct sk_buff
*skb
;
1166 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
1168 return ERR_PTR(-ENOMEM
);
1170 info
.in_skb
= in_skb
;
1172 info
.nlmsg_seq
= seq
;
1173 info
.nlmsg_flags
= 0;
1174 info
.this_idx
= info
.start_idx
= 0;
1176 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
1184 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1186 struct xfrm_policy
*xp
;
1187 struct xfrm_userpolicy_id
*p
;
1188 __u8 type
= XFRM_POLICY_TYPE_MAIN
;
1193 p
= NLMSG_DATA(nlh
);
1194 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1196 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1200 err
= verify_policy_dir(p
->dir
);
1205 xp
= xfrm_policy_byid(type
, p
->dir
, p
->index
, delete);
1207 struct rtattr
**rtattrs
= (struct rtattr
**)xfrma
;
1208 struct rtattr
*rt
= rtattrs
[XFRMA_SEC_CTX
-1];
1209 struct xfrm_policy tmp
;
1211 err
= verify_sec_ctx_len(rtattrs
);
1215 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
1217 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1219 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
1222 xp
= xfrm_policy_bysel_ctx(type
, p
->dir
, &p
->sel
, tmp
.security
, delete);
1223 security_xfrm_policy_free(&tmp
);
1229 struct sk_buff
*resp_skb
;
1231 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1232 if (IS_ERR(resp_skb
)) {
1233 err
= PTR_ERR(resp_skb
);
1235 err
= netlink_unicast(xfrm_nl
, resp_skb
,
1236 NETLINK_CB(skb
).pid
,
1240 if ((err
= security_xfrm_policy_delete(xp
)) != 0)
1242 c
.data
.byid
= p
->index
;
1243 c
.event
= nlh
->nlmsg_type
;
1244 c
.seq
= nlh
->nlmsg_seq
;
1245 c
.pid
= nlh
->nlmsg_pid
;
1246 km_policy_notify(xp
, p
->dir
, &c
);
1255 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1258 struct xfrm_usersa_flush
*p
= NLMSG_DATA(nlh
);
1260 xfrm_state_flush(p
->proto
);
1261 c
.data
.proto
= p
->proto
;
1262 c
.event
= nlh
->nlmsg_type
;
1263 c
.seq
= nlh
->nlmsg_seq
;
1264 c
.pid
= nlh
->nlmsg_pid
;
1265 km_state_notify(NULL
, &c
);
1271 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1273 struct xfrm_aevent_id
*id
;
1274 struct nlmsghdr
*nlh
;
1275 struct xfrm_lifetime_cur ltime
;
1276 unsigned char *b
= skb
->tail
;
1278 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
));
1279 id
= NLMSG_DATA(nlh
);
1280 nlh
->nlmsg_flags
= 0;
1282 id
->sa_id
.daddr
= x
->id
.daddr
;
1283 id
->sa_id
.spi
= x
->id
.spi
;
1284 id
->sa_id
.family
= x
->props
.family
;
1285 id
->sa_id
.proto
= x
->id
.proto
;
1286 id
->flags
= c
->data
.aevent
;
1288 RTA_PUT(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
), &x
->replay
);
1290 ltime
.bytes
= x
->curlft
.bytes
;
1291 ltime
.packets
= x
->curlft
.packets
;
1292 ltime
.add_time
= x
->curlft
.add_time
;
1293 ltime
.use_time
= x
->curlft
.use_time
;
1295 RTA_PUT(skb
, XFRMA_LTIME_VAL
, sizeof(struct xfrm_lifetime_cur
), <ime
);
1297 if (id
->flags
&XFRM_AE_RTHR
) {
1298 RTA_PUT(skb
,XFRMA_REPLAY_THRESH
,sizeof(u32
),&x
->replay_maxdiff
);
1301 if (id
->flags
&XFRM_AE_ETHR
) {
1302 u32 etimer
= x
->replay_maxage
*10/HZ
;
1303 RTA_PUT(skb
,XFRMA_ETIMER_THRESH
,sizeof(u32
),&etimer
);
1306 nlh
->nlmsg_len
= skb
->tail
- b
;
1311 skb_trim(skb
, b
- skb
->data
);
1315 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1317 struct xfrm_state
*x
;
1318 struct sk_buff
*r_skb
;
1321 struct xfrm_aevent_id
*p
= NLMSG_DATA(nlh
);
1322 int len
= NLMSG_LENGTH(sizeof(struct xfrm_aevent_id
));
1323 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1325 len
+= RTA_SPACE(sizeof(struct xfrm_replay_state
));
1326 len
+= RTA_SPACE(sizeof(struct xfrm_lifetime_cur
));
1328 if (p
->flags
&XFRM_AE_RTHR
)
1329 len
+=RTA_SPACE(sizeof(u32
));
1331 if (p
->flags
&XFRM_AE_ETHR
)
1332 len
+=RTA_SPACE(sizeof(u32
));
1334 r_skb
= alloc_skb(len
, GFP_ATOMIC
);
1338 x
= xfrm_state_lookup(&id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1345 * XXX: is this lock really needed - none of the other
1346 * gets lock (the concern is things getting updated
1347 * while we are still reading) - jhs
1349 spin_lock_bh(&x
->lock
);
1350 c
.data
.aevent
= p
->flags
;
1351 c
.seq
= nlh
->nlmsg_seq
;
1352 c
.pid
= nlh
->nlmsg_pid
;
1354 if (build_aevent(r_skb
, x
, &c
) < 0)
1356 err
= netlink_unicast(xfrm_nl
, r_skb
,
1357 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
1358 spin_unlock_bh(&x
->lock
);
1363 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1365 struct xfrm_state
*x
;
1368 struct xfrm_aevent_id
*p
= NLMSG_DATA(nlh
);
1369 struct rtattr
*rp
= xfrma
[XFRMA_REPLAY_VAL
-1];
1370 struct rtattr
*lt
= xfrma
[XFRMA_LTIME_VAL
-1];
1375 /* pedantic mode - thou shalt sayeth replaceth */
1376 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1379 x
= xfrm_state_lookup(&p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1383 if (x
->km
.state
!= XFRM_STATE_VALID
)
1386 spin_lock_bh(&x
->lock
);
1387 err
= xfrm_update_ae_params(x
,(struct rtattr
**)xfrma
);
1388 spin_unlock_bh(&x
->lock
);
1392 c
.event
= nlh
->nlmsg_type
;
1393 c
.seq
= nlh
->nlmsg_seq
;
1394 c
.pid
= nlh
->nlmsg_pid
;
1395 c
.data
.aevent
= XFRM_AE_CU
;
1396 km_state_notify(x
, &c
);
1403 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1406 __u8 type
= XFRM_POLICY_TYPE_MAIN
;
1409 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1413 xfrm_policy_flush(type
);
1415 c
.event
= nlh
->nlmsg_type
;
1416 c
.seq
= nlh
->nlmsg_seq
;
1417 c
.pid
= nlh
->nlmsg_pid
;
1418 km_policy_notify(NULL
, 0, &c
);
1422 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1424 struct xfrm_policy
*xp
;
1425 struct xfrm_user_polexpire
*up
= NLMSG_DATA(nlh
);
1426 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1427 __u8 type
= XFRM_POLICY_TYPE_MAIN
;
1430 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1435 xp
= xfrm_policy_byid(type
, p
->dir
, p
->index
, 0);
1437 struct rtattr
**rtattrs
= (struct rtattr
**)xfrma
;
1438 struct rtattr
*rt
= rtattrs
[XFRMA_SEC_CTX
-1];
1439 struct xfrm_policy tmp
;
1441 err
= verify_sec_ctx_len(rtattrs
);
1445 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
1447 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1449 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
1452 xp
= xfrm_policy_bysel_ctx(type
, p
->dir
, &p
->sel
, tmp
.security
, 0);
1453 security_xfrm_policy_free(&tmp
);
1458 read_lock(&xp
->lock
);
1460 read_unlock(&xp
->lock
);
1464 read_unlock(&xp
->lock
);
1467 xfrm_policy_delete(xp
, p
->dir
);
1469 // reset the timers here?
1470 printk("Dont know what to do with soft policy expire\n");
1472 km_policy_expired(xp
, p
->dir
, up
->hard
, current
->pid
);
1479 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1481 struct xfrm_state
*x
;
1483 struct xfrm_user_expire
*ue
= NLMSG_DATA(nlh
);
1484 struct xfrm_usersa_info
*p
= &ue
->state
;
1486 x
= xfrm_state_lookup(&p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
1494 spin_lock_bh(&x
->lock
);
1495 if (x
->km
.state
!= XFRM_STATE_VALID
)
1497 km_state_expired(x
, ue
->hard
, current
->pid
);
1500 __xfrm_state_delete(x
);
1502 spin_unlock_bh(&x
->lock
);
1507 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void **xfrma
)
1509 struct xfrm_policy
*xp
;
1510 struct xfrm_user_tmpl
*ut
;
1512 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
1514 struct xfrm_user_acquire
*ua
= NLMSG_DATA(nlh
);
1515 struct xfrm_state
*x
= xfrm_state_alloc();
1521 err
= verify_newpolicy_info(&ua
->policy
);
1523 printk("BAD policy passed\n");
1529 xp
= xfrm_policy_construct(&ua
->policy
, (struct rtattr
**) xfrma
, &err
); if (!xp
) {
1534 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
1535 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
1536 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
1539 /* extract the templates and for each call km_key */
1540 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
1541 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1542 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
1543 x
->props
.mode
= t
->mode
;
1544 x
->props
.reqid
= t
->reqid
;
1545 x
->props
.family
= ut
->family
;
1546 t
->aalgos
= ua
->aalgos
;
1547 t
->ealgos
= ua
->ealgos
;
1548 t
->calgos
= ua
->calgos
;
1549 err
= km_query(x
, t
, xp
);
1560 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1562 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
1563 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1564 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1565 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1566 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1567 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1568 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1569 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
1570 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
1571 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
1572 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1573 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1574 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
1575 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
1576 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = NLMSG_LENGTH(0),
1577 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
1578 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
1579 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
1584 static struct xfrm_link
{
1585 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, void **);
1586 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
1587 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
1588 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1589 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
1590 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
1591 .dump
= xfrm_dump_sa
},
1592 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1593 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
1594 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
1595 .dump
= xfrm_dump_policy
},
1596 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
1597 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
1598 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
1599 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1600 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1601 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
1602 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
1603 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
1604 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
1605 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
1608 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, int *errp
)
1610 struct rtattr
*xfrma
[XFRMA_MAX
];
1611 struct xfrm_link
*link
;
1614 if (!(nlh
->nlmsg_flags
& NLM_F_REQUEST
))
1617 type
= nlh
->nlmsg_type
;
1619 /* A control message: ignore them */
1620 if (type
< XFRM_MSG_BASE
)
1623 /* Unknown message: reply with EINVAL */
1624 if (type
> XFRM_MSG_MAX
)
1627 type
-= XFRM_MSG_BASE
;
1628 link
= &xfrm_dispatch
[type
];
1630 /* All operations require privileges, even GET */
1631 if (security_netlink_recv(skb
, CAP_NET_ADMIN
)) {
1636 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
1637 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
1638 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
1639 if (link
->dump
== NULL
)
1642 if ((*errp
= netlink_dump_start(xfrm_nl
, skb
, nlh
,
1643 link
->dump
, NULL
)) != 0) {
1647 netlink_queue_skip(nlh
, skb
);
1651 memset(xfrma
, 0, sizeof(xfrma
));
1653 if (nlh
->nlmsg_len
< (min_len
= xfrm_msg_min
[type
]))
1656 if (nlh
->nlmsg_len
> min_len
) {
1657 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
1658 struct rtattr
*attr
= (void *) nlh
+ NLMSG_ALIGN(min_len
);
1660 while (RTA_OK(attr
, attrlen
)) {
1661 unsigned short flavor
= attr
->rta_type
;
1663 if (flavor
> XFRMA_MAX
)
1665 xfrma
[flavor
- 1] = attr
;
1667 attr
= RTA_NEXT(attr
, attrlen
);
1671 if (link
->doit
== NULL
)
1673 *errp
= link
->doit(skb
, nlh
, (void **) &xfrma
);
1682 static void xfrm_netlink_rcv(struct sock
*sk
, int len
)
1684 unsigned int qlen
= 0;
1687 mutex_lock(&xfrm_cfg_mutex
);
1688 netlink_run_queue(sk
, &qlen
, &xfrm_user_rcv_msg
);
1689 mutex_unlock(&xfrm_cfg_mutex
);
1694 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1696 struct xfrm_user_expire
*ue
;
1697 struct nlmsghdr
*nlh
;
1698 unsigned char *b
= skb
->tail
;
1700 nlh
= NLMSG_PUT(skb
, c
->pid
, 0, XFRM_MSG_EXPIRE
,
1702 ue
= NLMSG_DATA(nlh
);
1703 nlh
->nlmsg_flags
= 0;
1705 copy_to_user_state(x
, &ue
->state
);
1706 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
1708 nlh
->nlmsg_len
= skb
->tail
- b
;
1712 skb_trim(skb
, b
- skb
->data
);
1716 static int xfrm_exp_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1718 struct sk_buff
*skb
;
1719 int len
= NLMSG_LENGTH(sizeof(struct xfrm_user_expire
));
1721 skb
= alloc_skb(len
, GFP_ATOMIC
);
1725 if (build_expire(skb
, x
, c
) < 0)
1728 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
1729 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
1732 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1734 struct sk_buff
*skb
;
1735 int len
= NLMSG_LENGTH(sizeof(struct xfrm_aevent_id
));
1737 len
+= RTA_SPACE(sizeof(struct xfrm_replay_state
));
1738 len
+= RTA_SPACE(sizeof(struct xfrm_lifetime_cur
));
1739 skb
= alloc_skb(len
, GFP_ATOMIC
);
1743 if (build_aevent(skb
, x
, c
) < 0)
1746 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_AEVENTS
;
1747 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
1750 static int xfrm_notify_sa_flush(struct km_event
*c
)
1752 struct xfrm_usersa_flush
*p
;
1753 struct nlmsghdr
*nlh
;
1754 struct sk_buff
*skb
;
1756 int len
= NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush
));
1758 skb
= alloc_skb(len
, GFP_ATOMIC
);
1763 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
,
1764 XFRM_MSG_FLUSHSA
, sizeof(*p
));
1765 nlh
->nlmsg_flags
= 0;
1767 p
= NLMSG_DATA(nlh
);
1768 p
->proto
= c
->data
.proto
;
1770 nlh
->nlmsg_len
= skb
->tail
- b
;
1772 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
1773 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
1780 static int inline xfrm_sa_len(struct xfrm_state
*x
)
1784 l
+= RTA_SPACE(sizeof(*x
->aalg
) + (x
->aalg
->alg_key_len
+7)/8);
1786 l
+= RTA_SPACE(sizeof(*x
->ealg
) + (x
->ealg
->alg_key_len
+7)/8);
1788 l
+= RTA_SPACE(sizeof(*x
->calg
));
1790 l
+= RTA_SPACE(sizeof(*x
->encap
));
1795 static int xfrm_notify_sa(struct xfrm_state
*x
, struct km_event
*c
)
1797 struct xfrm_usersa_info
*p
;
1798 struct xfrm_usersa_id
*id
;
1799 struct nlmsghdr
*nlh
;
1800 struct sk_buff
*skb
;
1802 int len
= xfrm_sa_len(x
);
1805 headlen
= sizeof(*p
);
1806 if (c
->event
== XFRM_MSG_DELSA
) {
1807 len
+= RTA_SPACE(headlen
);
1808 headlen
= sizeof(*id
);
1810 len
+= NLMSG_SPACE(headlen
);
1812 skb
= alloc_skb(len
, GFP_ATOMIC
);
1817 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, c
->event
, headlen
);
1818 nlh
->nlmsg_flags
= 0;
1820 p
= NLMSG_DATA(nlh
);
1821 if (c
->event
== XFRM_MSG_DELSA
) {
1822 id
= NLMSG_DATA(nlh
);
1823 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
1824 id
->spi
= x
->id
.spi
;
1825 id
->family
= x
->props
.family
;
1826 id
->proto
= x
->id
.proto
;
1828 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_SA
, sizeof(*p
)));
1831 copy_to_user_state(x
, p
);
1834 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
1835 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
1837 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
1838 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
1840 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
1843 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
1845 nlh
->nlmsg_len
= skb
->tail
- b
;
1847 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
1848 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
1856 static int xfrm_send_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
1860 case XFRM_MSG_EXPIRE
:
1861 return xfrm_exp_state_notify(x
, c
);
1862 case XFRM_MSG_NEWAE
:
1863 return xfrm_aevent_state_notify(x
, c
);
1864 case XFRM_MSG_DELSA
:
1865 case XFRM_MSG_UPDSA
:
1866 case XFRM_MSG_NEWSA
:
1867 return xfrm_notify_sa(x
, c
);
1868 case XFRM_MSG_FLUSHSA
:
1869 return xfrm_notify_sa_flush(c
);
1871 printk("xfrm_user: Unknown SA event %d\n", c
->event
);
1879 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
1880 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
1883 struct xfrm_user_acquire
*ua
;
1884 struct nlmsghdr
*nlh
;
1885 unsigned char *b
= skb
->tail
;
1886 __u32 seq
= xfrm_get_acqseq();
1888 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_ACQUIRE
,
1890 ua
= NLMSG_DATA(nlh
);
1891 nlh
->nlmsg_flags
= 0;
1893 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
1894 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
1895 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
1896 copy_to_user_policy(xp
, &ua
->policy
, dir
);
1897 ua
->aalgos
= xt
->aalgos
;
1898 ua
->ealgos
= xt
->ealgos
;
1899 ua
->calgos
= xt
->calgos
;
1900 ua
->seq
= x
->km
.seq
= seq
;
1902 if (copy_to_user_tmpl(xp
, skb
) < 0)
1904 if (copy_to_user_state_sec_ctx(x
, skb
))
1906 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1909 nlh
->nlmsg_len
= skb
->tail
- b
;
1913 skb_trim(skb
, b
- skb
->data
);
1917 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
1918 struct xfrm_policy
*xp
, int dir
)
1920 struct sk_buff
*skb
;
1923 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
1924 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_acquire
));
1925 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
));
1926 #ifdef CONFIG_XFRM_SUB_POLICY
1927 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
1929 skb
= alloc_skb(len
, GFP_ATOMIC
);
1933 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
1936 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_ACQUIRE
;
1937 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
1940 /* User gives us xfrm_user_policy_info followed by an array of 0
1941 * or more templates.
1943 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
1944 u8
*data
, int len
, int *dir
)
1946 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
1947 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
1948 struct xfrm_policy
*xp
;
1951 switch (sk
->sk_family
) {
1953 if (opt
!= IP_XFRM_POLICY
) {
1958 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1960 if (opt
!= IPV6_XFRM_POLICY
) {
1973 if (len
< sizeof(*p
) ||
1974 verify_newpolicy_info(p
))
1977 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
1978 if (nr
> XFRM_MAX_DEPTH
)
1981 if (p
->dir
> XFRM_POLICY_OUT
)
1984 xp
= xfrm_policy_alloc(GFP_KERNEL
);
1990 copy_from_user_policy(xp
, p
);
1991 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
1992 copy_templates(xp
, ut
, nr
);
1999 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2000 int dir
, struct km_event
*c
)
2002 struct xfrm_user_polexpire
*upe
;
2003 struct nlmsghdr
*nlh
;
2004 int hard
= c
->data
.hard
;
2005 unsigned char *b
= skb
->tail
;
2007 nlh
= NLMSG_PUT(skb
, c
->pid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
));
2008 upe
= NLMSG_DATA(nlh
);
2009 nlh
->nlmsg_flags
= 0;
2011 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2012 if (copy_to_user_tmpl(xp
, skb
) < 0)
2014 if (copy_to_user_sec_ctx(xp
, skb
))
2016 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2020 nlh
->nlmsg_len
= skb
->tail
- b
;
2024 skb_trim(skb
, b
- skb
->data
);
2028 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2030 struct sk_buff
*skb
;
2033 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2034 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_polexpire
));
2035 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
));
2036 #ifdef CONFIG_XFRM_SUB_POLICY
2037 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2039 skb
= alloc_skb(len
, GFP_ATOMIC
);
2043 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2046 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
2047 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2050 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2052 struct xfrm_userpolicy_info
*p
;
2053 struct xfrm_userpolicy_id
*id
;
2054 struct nlmsghdr
*nlh
;
2055 struct sk_buff
*skb
;
2057 int len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2060 headlen
= sizeof(*p
);
2061 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2062 len
+= RTA_SPACE(headlen
);
2063 headlen
= sizeof(*id
);
2065 #ifdef CONFIG_XFRM_SUB_POLICY
2066 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2068 len
+= NLMSG_SPACE(headlen
);
2070 skb
= alloc_skb(len
, GFP_ATOMIC
);
2075 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, c
->event
, headlen
);
2077 p
= NLMSG_DATA(nlh
);
2078 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2079 id
= NLMSG_DATA(nlh
);
2080 memset(id
, 0, sizeof(*id
));
2083 id
->index
= xp
->index
;
2085 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2087 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_POLICY
, sizeof(*p
)));
2090 nlh
->nlmsg_flags
= 0;
2092 copy_to_user_policy(xp
, p
, dir
);
2093 if (copy_to_user_tmpl(xp
, skb
) < 0)
2095 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2098 nlh
->nlmsg_len
= skb
->tail
- b
;
2100 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
2101 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2109 static int xfrm_notify_policy_flush(struct km_event
*c
)
2111 struct nlmsghdr
*nlh
;
2112 struct sk_buff
*skb
;
2115 #ifdef CONFIG_XFRM_SUB_POLICY
2116 struct xfrm_userpolicy_type upt
;
2117 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2119 len
+= NLMSG_LENGTH(0);
2121 skb
= alloc_skb(len
, GFP_ATOMIC
);
2127 nlh
= NLMSG_PUT(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0);
2128 nlh
->nlmsg_flags
= 0;
2130 #ifdef CONFIG_XFRM_SUB_POLICY
2131 memset(&upt
, 0, sizeof(upt
));
2132 upt
.type
= c
->data
.type
;
2133 RTA_PUT(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
2136 nlh
->nlmsg_len
= skb
->tail
- b
;
2138 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
2139 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2142 #ifdef CONFIG_XFRM_SUB_POLICY
2149 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2153 case XFRM_MSG_NEWPOLICY
:
2154 case XFRM_MSG_UPDPOLICY
:
2155 case XFRM_MSG_DELPOLICY
:
2156 return xfrm_notify_policy(xp
, dir
, c
);
2157 case XFRM_MSG_FLUSHPOLICY
:
2158 return xfrm_notify_policy_flush(c
);
2159 case XFRM_MSG_POLEXPIRE
:
2160 return xfrm_exp_policy_notify(xp
, dir
, c
);
2162 printk("xfrm_user: Unknown Policy event %d\n", c
->event
);
2169 static int build_report(struct sk_buff
*skb
, u8 proto
,
2170 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2172 struct xfrm_user_report
*ur
;
2173 struct nlmsghdr
*nlh
;
2174 unsigned char *b
= skb
->tail
;
2176 nlh
= NLMSG_PUT(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
));
2177 ur
= NLMSG_DATA(nlh
);
2178 nlh
->nlmsg_flags
= 0;
2181 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2184 RTA_PUT(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2186 nlh
->nlmsg_len
= skb
->tail
- b
;
2191 skb_trim(skb
, b
- skb
->data
);
2195 static int xfrm_send_report(u8 proto
, struct xfrm_selector
*sel
,
2196 xfrm_address_t
*addr
)
2198 struct sk_buff
*skb
;
2201 len
= NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report
)));
2202 skb
= alloc_skb(len
, GFP_ATOMIC
);
2206 if (build_report(skb
, proto
, sel
, addr
) < 0)
2209 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_REPORT
;
2210 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2213 static struct xfrm_mgr netlink_mgr
= {
2215 .notify
= xfrm_send_state_notify
,
2216 .acquire
= xfrm_send_acquire
,
2217 .compile_policy
= xfrm_compile_policy
,
2218 .notify_policy
= xfrm_send_policy_notify
,
2219 .report
= xfrm_send_report
,
2222 static int __init
xfrm_user_init(void)
2226 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
2228 nlsk
= netlink_kernel_create(NETLINK_XFRM
, XFRMNLGRP_MAX
,
2229 xfrm_netlink_rcv
, THIS_MODULE
);
2232 rcu_assign_pointer(xfrm_nl
, nlsk
);
2234 xfrm_register_km(&netlink_mgr
);
2239 static void __exit
xfrm_user_exit(void)
2241 struct sock
*nlsk
= xfrm_nl
;
2243 xfrm_unregister_km(&netlink_mgr
);
2244 rcu_assign_pointer(xfrm_nl
, NULL
);
2246 sock_release(nlsk
->sk_socket
);
2249 module_init(xfrm_user_init
);
2250 module_exit(xfrm_user_exit
);
2251 MODULE_LICENSE("GPL");
2252 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);