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_sec_ctx
*xfrm_ctx
)
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
;
327 * Set inner address family if the KM left it as zero.
328 * See comment in validate_tmpl.
331 x
->sel
.family
= p
->family
;
335 * someday when pfkey also has support, we could have the code
336 * somehow made shareable and move it to xfrm_state.c - JHS
339 static int xfrm_update_ae_params(struct xfrm_state
*x
, struct rtattr
**xfrma
)
342 struct rtattr
*rp
= xfrma
[XFRMA_REPLAY_VAL
-1];
343 struct rtattr
*lt
= xfrma
[XFRMA_LTIME_VAL
-1];
344 struct rtattr
*et
= xfrma
[XFRMA_ETIMER_THRESH
-1];
345 struct rtattr
*rt
= xfrma
[XFRMA_REPLAY_THRESH
-1];
348 struct xfrm_replay_state
*replay
;
349 if (RTA_PAYLOAD(rp
) < sizeof(*replay
))
351 replay
= RTA_DATA(rp
);
352 memcpy(&x
->replay
, replay
, sizeof(*replay
));
353 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
357 struct xfrm_lifetime_cur
*ltime
;
358 if (RTA_PAYLOAD(lt
) < sizeof(*ltime
))
360 ltime
= RTA_DATA(lt
);
361 x
->curlft
.bytes
= ltime
->bytes
;
362 x
->curlft
.packets
= ltime
->packets
;
363 x
->curlft
.add_time
= ltime
->add_time
;
364 x
->curlft
.use_time
= ltime
->use_time
;
368 if (RTA_PAYLOAD(et
) < sizeof(u32
))
370 x
->replay_maxage
= *(u32
*)RTA_DATA(et
);
374 if (RTA_PAYLOAD(rt
) < sizeof(u32
))
376 x
->replay_maxdiff
= *(u32
*)RTA_DATA(rt
);
384 static struct xfrm_state
*xfrm_state_construct(struct xfrm_usersa_info
*p
,
385 struct rtattr
**xfrma
,
388 struct xfrm_state
*x
= xfrm_state_alloc();
394 copy_from_user_state(x
, p
);
396 if ((err
= attach_one_algo(&x
->aalg
, &x
->props
.aalgo
,
397 xfrm_aalg_get_byname
,
398 xfrma
[XFRMA_ALG_AUTH
-1])))
400 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
401 xfrm_ealg_get_byname
,
402 xfrma
[XFRMA_ALG_CRYPT
-1])))
404 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
405 xfrm_calg_get_byname
,
406 xfrma
[XFRMA_ALG_COMP
-1])))
408 if ((err
= attach_encap_tmpl(&x
->encap
, xfrma
[XFRMA_ENCAP
-1])))
410 if ((err
= attach_one_addr(&x
->coaddr
, xfrma
[XFRMA_COADDR
-1])))
412 err
= xfrm_init_state(x
);
416 if ((err
= attach_sec_ctx(x
, xfrma
[XFRMA_SEC_CTX
-1])))
420 x
->replay_maxdiff
= sysctl_xfrm_aevent_rseqth
;
421 /* sysctl_xfrm_aevent_etime is in 100ms units */
422 x
->replay_maxage
= (sysctl_xfrm_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
423 x
->preplay
.bitmap
= 0;
424 x
->preplay
.seq
= x
->replay
.seq
+x
->replay_maxdiff
;
425 x
->preplay
.oseq
= x
->replay
.oseq
+x
->replay_maxdiff
;
427 /* override default values from above */
429 err
= xfrm_update_ae_params(x
, (struct rtattr
**)xfrma
);
436 x
->km
.state
= XFRM_STATE_DEAD
;
443 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
444 struct rtattr
**xfrma
)
446 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
447 struct xfrm_state
*x
;
451 err
= verify_newsa_info(p
, xfrma
);
455 x
= xfrm_state_construct(p
, xfrma
, &err
);
460 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
461 err
= xfrm_state_add(x
);
463 err
= xfrm_state_update(x
);
465 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
466 AUDIT_MAC_IPSEC_ADDSA
, err
? 0 : 1, NULL
, x
);
469 x
->km
.state
= XFRM_STATE_DEAD
;
474 c
.seq
= nlh
->nlmsg_seq
;
475 c
.pid
= nlh
->nlmsg_pid
;
476 c
.event
= nlh
->nlmsg_type
;
478 km_state_notify(x
, &c
);
484 static struct xfrm_state
*xfrm_user_state_lookup(struct xfrm_usersa_id
*p
,
485 struct rtattr
**xfrma
,
488 struct xfrm_state
*x
= NULL
;
491 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
493 x
= xfrm_state_lookup(&p
->daddr
, p
->spi
, p
->proto
, p
->family
);
495 xfrm_address_t
*saddr
= NULL
;
497 err
= verify_one_addr(xfrma
, XFRMA_SRCADDR
, &saddr
);
507 x
= xfrm_state_lookup_byaddr(&p
->daddr
, saddr
, p
->proto
,
517 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
518 struct rtattr
**xfrma
)
520 struct xfrm_state
*x
;
523 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
525 x
= xfrm_user_state_lookup(p
, xfrma
, &err
);
529 if ((err
= security_xfrm_state_delete(x
)) != 0)
532 if (xfrm_state_kern(x
)) {
537 err
= xfrm_state_delete(x
);
542 c
.seq
= nlh
->nlmsg_seq
;
543 c
.pid
= nlh
->nlmsg_pid
;
544 c
.event
= nlh
->nlmsg_type
;
545 km_state_notify(x
, &c
);
548 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
549 AUDIT_MAC_IPSEC_DELSA
, err
? 0 : 1, NULL
, x
);
554 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
556 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
557 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
558 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
559 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
560 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
561 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
562 p
->mode
= x
->props
.mode
;
563 p
->replay_window
= x
->props
.replay_window
;
564 p
->reqid
= x
->props
.reqid
;
565 p
->family
= x
->props
.family
;
566 p
->flags
= x
->props
.flags
;
570 struct xfrm_dump_info
{
571 struct sk_buff
*in_skb
;
572 struct sk_buff
*out_skb
;
579 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
581 struct xfrm_dump_info
*sp
= ptr
;
582 struct sk_buff
*in_skb
= sp
->in_skb
;
583 struct sk_buff
*skb
= sp
->out_skb
;
584 struct xfrm_usersa_info
*p
;
585 struct nlmsghdr
*nlh
;
587 if (sp
->this_idx
< sp
->start_idx
)
590 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
591 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
596 copy_to_user_state(x
, p
);
599 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
600 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
602 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
603 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
605 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
608 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
611 int ctx_size
= sizeof(struct xfrm_sec_ctx
) +
612 x
->security
->ctx_len
;
613 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
614 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
616 uctx
->exttype
= XFRMA_SEC_CTX
;
617 uctx
->len
= ctx_size
;
618 uctx
->ctx_doi
= x
->security
->ctx_doi
;
619 uctx
->ctx_alg
= x
->security
->ctx_alg
;
620 uctx
->ctx_len
= x
->security
->ctx_len
;
621 memcpy(uctx
+ 1, x
->security
->ctx_str
, x
->security
->ctx_len
);
625 RTA_PUT(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
628 RTA_PUT(skb
, XFRMA_LASTUSED
, sizeof(x
->lastused
), &x
->lastused
);
636 nlmsg_cancel(skb
, nlh
);
640 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
642 struct xfrm_dump_info info
;
644 info
.in_skb
= cb
->skb
;
646 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
647 info
.nlmsg_flags
= NLM_F_MULTI
;
649 info
.start_idx
= cb
->args
[0];
650 (void) xfrm_state_walk(0, dump_one_state
, &info
);
651 cb
->args
[0] = info
.this_idx
;
656 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
657 struct xfrm_state
*x
, u32 seq
)
659 struct xfrm_dump_info info
;
662 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_ATOMIC
);
664 return ERR_PTR(-ENOMEM
);
666 info
.in_skb
= in_skb
;
668 info
.nlmsg_seq
= seq
;
669 info
.nlmsg_flags
= 0;
670 info
.this_idx
= info
.start_idx
= 0;
672 if (dump_one_state(x
, 0, &info
)) {
680 static int build_spdinfo(struct sk_buff
*skb
, u32 pid
, u32 seq
, u32 flags
)
682 struct xfrmk_spdinfo si
;
683 struct xfrmu_spdinfo spc
;
684 struct xfrmu_spdhinfo sph
;
685 struct nlmsghdr
*nlh
;
688 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
689 if (nlh
== NULL
) /* shouldnt really happen ... */
694 xfrm_spd_getinfo(&si
);
695 spc
.incnt
= si
.incnt
;
696 spc
.outcnt
= si
.outcnt
;
697 spc
.fwdcnt
= si
.fwdcnt
;
698 spc
.inscnt
= si
.inscnt
;
699 spc
.outscnt
= si
.outscnt
;
700 spc
.fwdscnt
= si
.fwdscnt
;
701 sph
.spdhcnt
= si
.spdhcnt
;
702 sph
.spdhmcnt
= si
.spdhmcnt
;
704 NLA_PUT(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
705 NLA_PUT(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
707 return nlmsg_end(skb
, nlh
);
710 nlmsg_cancel(skb
, nlh
);
714 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
715 struct rtattr
**xfrma
)
717 struct sk_buff
*r_skb
;
718 u32
*flags
= nlmsg_data(nlh
);
719 u32 spid
= NETLINK_CB(skb
).pid
;
720 u32 seq
= nlh
->nlmsg_seq
;
721 int len
= NLMSG_LENGTH(sizeof(u32
));
723 len
+= RTA_SPACE(sizeof(struct xfrmu_spdinfo
));
724 len
+= RTA_SPACE(sizeof(struct xfrmu_spdhinfo
));
726 r_skb
= alloc_skb(len
, GFP_ATOMIC
);
730 if (build_spdinfo(r_skb
, spid
, seq
, *flags
) < 0)
733 return nlmsg_unicast(xfrm_nl
, r_skb
, spid
);
736 static int build_sadinfo(struct sk_buff
*skb
, u32 pid
, u32 seq
, u32 flags
)
738 struct xfrmk_sadinfo si
;
739 struct xfrmu_sadhinfo sh
;
740 struct nlmsghdr
*nlh
;
743 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
744 if (nlh
== NULL
) /* shouldnt really happen ... */
749 xfrm_sad_getinfo(&si
);
751 sh
.sadhmcnt
= si
.sadhmcnt
;
752 sh
.sadhcnt
= si
.sadhcnt
;
754 NLA_PUT_U32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
755 NLA_PUT(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
757 return nlmsg_end(skb
, nlh
);
760 nlmsg_cancel(skb
, nlh
);
764 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
765 struct rtattr
**xfrma
)
767 struct sk_buff
*r_skb
;
768 u32
*flags
= nlmsg_data(nlh
);
769 u32 spid
= NETLINK_CB(skb
).pid
;
770 u32 seq
= nlh
->nlmsg_seq
;
771 int len
= NLMSG_LENGTH(sizeof(u32
));
773 len
+= RTA_SPACE(sizeof(struct xfrmu_sadhinfo
));
774 len
+= RTA_SPACE(sizeof(u32
));
776 r_skb
= alloc_skb(len
, GFP_ATOMIC
);
781 if (build_sadinfo(r_skb
, spid
, seq
, *flags
) < 0)
784 return nlmsg_unicast(xfrm_nl
, r_skb
, spid
);
787 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
788 struct rtattr
**xfrma
)
790 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
791 struct xfrm_state
*x
;
792 struct sk_buff
*resp_skb
;
795 x
= xfrm_user_state_lookup(p
, xfrma
, &err
);
799 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
800 if (IS_ERR(resp_skb
)) {
801 err
= PTR_ERR(resp_skb
);
803 err
= netlink_unicast(xfrm_nl
, resp_skb
,
804 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
811 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
813 switch (p
->info
.id
.proto
) {
819 /* IPCOMP spi is 16-bits. */
820 if (p
->max
>= 0x10000)
834 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
835 struct rtattr
**xfrma
)
837 struct xfrm_state
*x
;
838 struct xfrm_userspi_info
*p
;
839 struct sk_buff
*resp_skb
;
840 xfrm_address_t
*daddr
;
845 err
= verify_userspi_info(p
);
849 family
= p
->info
.family
;
850 daddr
= &p
->info
.id
.daddr
;
854 x
= xfrm_find_acq_byseq(p
->info
.seq
);
855 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
862 x
= xfrm_find_acq(p
->info
.mode
, p
->info
.reqid
,
863 p
->info
.id
.proto
, daddr
,
870 resp_skb
= ERR_PTR(-ENOENT
);
872 spin_lock_bh(&x
->lock
);
873 if (x
->km
.state
!= XFRM_STATE_DEAD
) {
874 xfrm_alloc_spi(x
, htonl(p
->min
), htonl(p
->max
));
876 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
878 spin_unlock_bh(&x
->lock
);
880 if (IS_ERR(resp_skb
)) {
881 err
= PTR_ERR(resp_skb
);
885 err
= netlink_unicast(xfrm_nl
, resp_skb
,
886 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
894 static int verify_policy_dir(u8 dir
)
898 case XFRM_POLICY_OUT
:
899 case XFRM_POLICY_FWD
:
909 static int verify_policy_type(u8 type
)
912 case XFRM_POLICY_TYPE_MAIN
:
913 #ifdef CONFIG_XFRM_SUB_POLICY
914 case XFRM_POLICY_TYPE_SUB
:
925 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
929 case XFRM_SHARE_SESSION
:
930 case XFRM_SHARE_USER
:
931 case XFRM_SHARE_UNIQUE
:
939 case XFRM_POLICY_ALLOW
:
940 case XFRM_POLICY_BLOCK
:
947 switch (p
->sel
.family
) {
952 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
955 return -EAFNOSUPPORT
;
962 return verify_policy_dir(p
->dir
);
965 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
967 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
-1];
968 struct xfrm_user_sec_ctx
*uctx
;
974 return security_xfrm_policy_alloc(pol
, uctx
);
977 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
983 for (i
= 0; i
< nr
; i
++, ut
++) {
984 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
986 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
987 memcpy(&t
->saddr
, &ut
->saddr
,
988 sizeof(xfrm_address_t
));
989 t
->reqid
= ut
->reqid
;
991 t
->share
= ut
->share
;
992 t
->optional
= ut
->optional
;
993 t
->aalgos
= ut
->aalgos
;
994 t
->ealgos
= ut
->ealgos
;
995 t
->calgos
= ut
->calgos
;
996 t
->encap_family
= ut
->family
;
1000 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1004 if (nr
> XFRM_MAX_DEPTH
)
1007 for (i
= 0; i
< nr
; i
++) {
1008 /* We never validated the ut->family value, so many
1009 * applications simply leave it at zero. The check was
1010 * never made and ut->family was ignored because all
1011 * templates could be assumed to have the same family as
1012 * the policy itself. Now that we will have ipv4-in-ipv6
1013 * and ipv6-in-ipv4 tunnels, this is no longer true.
1016 ut
[i
].family
= family
;
1018 switch (ut
[i
].family
) {
1021 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1033 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct rtattr
**xfrma
)
1035 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
1040 struct xfrm_user_tmpl
*utmpl
= RTA_DATA(rt
);
1041 int nr
= (rt
->rta_len
- sizeof(*rt
)) / sizeof(*utmpl
);
1044 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1048 copy_templates(pol
, RTA_DATA(rt
), nr
);
1053 static int copy_from_user_policy_type(u8
*tp
, struct rtattr
**xfrma
)
1055 struct rtattr
*rt
= xfrma
[XFRMA_POLICY_TYPE
-1];
1056 struct xfrm_userpolicy_type
*upt
;
1057 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1061 if (rt
->rta_len
< sizeof(*upt
))
1068 err
= verify_policy_type(type
);
1076 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1078 xp
->priority
= p
->priority
;
1079 xp
->index
= p
->index
;
1080 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1081 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1082 xp
->action
= p
->action
;
1083 xp
->flags
= p
->flags
;
1084 xp
->family
= p
->sel
.family
;
1085 /* XXX xp->share = p->share; */
1088 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1090 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1091 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1092 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1093 p
->priority
= xp
->priority
;
1094 p
->index
= xp
->index
;
1095 p
->sel
.family
= xp
->family
;
1097 p
->action
= xp
->action
;
1098 p
->flags
= xp
->flags
;
1099 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1102 static struct xfrm_policy
*xfrm_policy_construct(struct xfrm_userpolicy_info
*p
, struct rtattr
**xfrma
, int *errp
)
1104 struct xfrm_policy
*xp
= xfrm_policy_alloc(GFP_KERNEL
);
1112 copy_from_user_policy(xp
, p
);
1114 err
= copy_from_user_policy_type(&xp
->type
, xfrma
);
1118 if (!(err
= copy_from_user_tmpl(xp
, xfrma
)))
1119 err
= copy_from_user_sec_ctx(xp
, xfrma
);
1130 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1131 struct rtattr
**xfrma
)
1133 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1134 struct xfrm_policy
*xp
;
1139 err
= verify_newpolicy_info(p
);
1142 err
= verify_sec_ctx_len(xfrma
);
1146 xp
= xfrm_policy_construct(p
, xfrma
, &err
);
1150 /* shouldnt excl be based on nlh flags??
1151 * Aha! this is anti-netlink really i.e more pfkey derived
1152 * in netlink excl is a flag and you wouldnt need
1153 * a type XFRM_MSG_UPDPOLICY - JHS */
1154 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1155 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1156 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1157 AUDIT_MAC_IPSEC_DELSPD
, err
? 0 : 1, xp
, NULL
);
1160 security_xfrm_policy_free(xp
);
1165 c
.event
= nlh
->nlmsg_type
;
1166 c
.seq
= nlh
->nlmsg_seq
;
1167 c
.pid
= nlh
->nlmsg_pid
;
1168 km_policy_notify(xp
, p
->dir
, &c
);
1175 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1177 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1180 if (xp
->xfrm_nr
== 0)
1183 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1184 struct xfrm_user_tmpl
*up
= &vec
[i
];
1185 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1187 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1188 up
->family
= kp
->encap_family
;
1189 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1190 up
->reqid
= kp
->reqid
;
1191 up
->mode
= kp
->mode
;
1192 up
->share
= kp
->share
;
1193 up
->optional
= kp
->optional
;
1194 up
->aalgos
= kp
->aalgos
;
1195 up
->ealgos
= kp
->ealgos
;
1196 up
->calgos
= kp
->calgos
;
1198 RTA_PUT(skb
, XFRMA_TMPL
,
1199 (sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
),
1208 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
1210 int ctx_size
= sizeof(struct xfrm_sec_ctx
) + s
->ctx_len
;
1211 struct rtattr
*rt
= __RTA_PUT(skb
, XFRMA_SEC_CTX
, ctx_size
);
1212 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1214 uctx
->exttype
= XFRMA_SEC_CTX
;
1215 uctx
->len
= ctx_size
;
1216 uctx
->ctx_doi
= s
->ctx_doi
;
1217 uctx
->ctx_alg
= s
->ctx_alg
;
1218 uctx
->ctx_len
= s
->ctx_len
;
1219 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
1226 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1229 return copy_sec_ctx(x
->security
, skb
);
1234 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1237 return copy_sec_ctx(xp
->security
, skb
);
1242 #ifdef CONFIG_XFRM_SUB_POLICY
1243 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1245 struct xfrm_userpolicy_type upt
;
1247 memset(&upt
, 0, sizeof(upt
));
1250 RTA_PUT(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1259 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1265 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1267 struct xfrm_dump_info
*sp
= ptr
;
1268 struct xfrm_userpolicy_info
*p
;
1269 struct sk_buff
*in_skb
= sp
->in_skb
;
1270 struct sk_buff
*skb
= sp
->out_skb
;
1271 struct nlmsghdr
*nlh
;
1273 if (sp
->this_idx
< sp
->start_idx
)
1276 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
1277 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1281 p
= nlmsg_data(nlh
);
1282 copy_to_user_policy(xp
, p
, dir
);
1283 if (copy_to_user_tmpl(xp
, skb
) < 0)
1285 if (copy_to_user_sec_ctx(xp
, skb
))
1287 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1290 nlmsg_end(skb
, nlh
);
1296 nlmsg_cancel(skb
, nlh
);
1300 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1302 struct xfrm_dump_info info
;
1304 info
.in_skb
= cb
->skb
;
1306 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1307 info
.nlmsg_flags
= NLM_F_MULTI
;
1309 info
.start_idx
= cb
->args
[0];
1310 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN
, dump_one_policy
, &info
);
1311 #ifdef CONFIG_XFRM_SUB_POLICY
1312 (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB
, dump_one_policy
, &info
);
1314 cb
->args
[0] = info
.this_idx
;
1319 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1320 struct xfrm_policy
*xp
,
1323 struct xfrm_dump_info info
;
1324 struct sk_buff
*skb
;
1326 skb
= alloc_skb(NLMSG_GOODSIZE
, GFP_KERNEL
);
1328 return ERR_PTR(-ENOMEM
);
1330 info
.in_skb
= in_skb
;
1332 info
.nlmsg_seq
= seq
;
1333 info
.nlmsg_flags
= 0;
1334 info
.this_idx
= info
.start_idx
= 0;
1336 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
1344 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1345 struct rtattr
**xfrma
)
1347 struct xfrm_policy
*xp
;
1348 struct xfrm_userpolicy_id
*p
;
1349 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1354 p
= nlmsg_data(nlh
);
1355 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1357 err
= copy_from_user_policy_type(&type
, xfrma
);
1361 err
= verify_policy_dir(p
->dir
);
1366 xp
= xfrm_policy_byid(type
, p
->dir
, p
->index
, delete, &err
);
1368 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
-1];
1369 struct xfrm_policy tmp
;
1371 err
= verify_sec_ctx_len(xfrma
);
1375 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
1377 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1379 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
1382 xp
= xfrm_policy_bysel_ctx(type
, p
->dir
, &p
->sel
, tmp
.security
,
1384 security_xfrm_policy_free(&tmp
);
1390 struct sk_buff
*resp_skb
;
1392 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1393 if (IS_ERR(resp_skb
)) {
1394 err
= PTR_ERR(resp_skb
);
1396 err
= netlink_unicast(xfrm_nl
, resp_skb
,
1397 NETLINK_CB(skb
).pid
,
1401 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1402 AUDIT_MAC_IPSEC_DELSPD
, err
? 0 : 1, xp
, NULL
);
1407 c
.data
.byid
= p
->index
;
1408 c
.event
= nlh
->nlmsg_type
;
1409 c
.seq
= nlh
->nlmsg_seq
;
1410 c
.pid
= nlh
->nlmsg_pid
;
1411 km_policy_notify(xp
, p
->dir
, &c
);
1419 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1420 struct rtattr
**xfrma
)
1423 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1424 struct xfrm_audit audit_info
;
1427 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1428 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1429 err
= xfrm_state_flush(p
->proto
, &audit_info
);
1432 c
.data
.proto
= p
->proto
;
1433 c
.event
= nlh
->nlmsg_type
;
1434 c
.seq
= nlh
->nlmsg_seq
;
1435 c
.pid
= nlh
->nlmsg_pid
;
1436 km_state_notify(NULL
, &c
);
1442 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1444 struct xfrm_aevent_id
*id
;
1445 struct nlmsghdr
*nlh
;
1446 struct xfrm_lifetime_cur ltime
;
1448 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1452 id
= nlmsg_data(nlh
);
1453 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
,sizeof(x
->id
.daddr
));
1454 id
->sa_id
.spi
= x
->id
.spi
;
1455 id
->sa_id
.family
= x
->props
.family
;
1456 id
->sa_id
.proto
= x
->id
.proto
;
1457 memcpy(&id
->saddr
, &x
->props
.saddr
,sizeof(x
->props
.saddr
));
1458 id
->reqid
= x
->props
.reqid
;
1459 id
->flags
= c
->data
.aevent
;
1461 RTA_PUT(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
), &x
->replay
);
1463 ltime
.bytes
= x
->curlft
.bytes
;
1464 ltime
.packets
= x
->curlft
.packets
;
1465 ltime
.add_time
= x
->curlft
.add_time
;
1466 ltime
.use_time
= x
->curlft
.use_time
;
1468 RTA_PUT(skb
, XFRMA_LTIME_VAL
, sizeof(struct xfrm_lifetime_cur
), <ime
);
1470 if (id
->flags
&XFRM_AE_RTHR
) {
1471 RTA_PUT(skb
,XFRMA_REPLAY_THRESH
,sizeof(u32
),&x
->replay_maxdiff
);
1474 if (id
->flags
&XFRM_AE_ETHR
) {
1475 u32 etimer
= x
->replay_maxage
*10/HZ
;
1476 RTA_PUT(skb
,XFRMA_ETIMER_THRESH
,sizeof(u32
),&etimer
);
1479 return nlmsg_end(skb
, nlh
);
1482 nlmsg_cancel(skb
, nlh
);
1486 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1487 struct rtattr
**xfrma
)
1489 struct xfrm_state
*x
;
1490 struct sk_buff
*r_skb
;
1493 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1494 int len
= NLMSG_LENGTH(sizeof(struct xfrm_aevent_id
));
1495 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1497 len
+= RTA_SPACE(sizeof(struct xfrm_replay_state
));
1498 len
+= RTA_SPACE(sizeof(struct xfrm_lifetime_cur
));
1500 if (p
->flags
&XFRM_AE_RTHR
)
1501 len
+=RTA_SPACE(sizeof(u32
));
1503 if (p
->flags
&XFRM_AE_ETHR
)
1504 len
+=RTA_SPACE(sizeof(u32
));
1506 r_skb
= alloc_skb(len
, GFP_ATOMIC
);
1510 x
= xfrm_state_lookup(&id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1517 * XXX: is this lock really needed - none of the other
1518 * gets lock (the concern is things getting updated
1519 * while we are still reading) - jhs
1521 spin_lock_bh(&x
->lock
);
1522 c
.data
.aevent
= p
->flags
;
1523 c
.seq
= nlh
->nlmsg_seq
;
1524 c
.pid
= nlh
->nlmsg_pid
;
1526 if (build_aevent(r_skb
, x
, &c
) < 0)
1528 err
= netlink_unicast(xfrm_nl
, r_skb
,
1529 NETLINK_CB(skb
).pid
, MSG_DONTWAIT
);
1530 spin_unlock_bh(&x
->lock
);
1535 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1536 struct rtattr
**xfrma
)
1538 struct xfrm_state
*x
;
1541 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1542 struct rtattr
*rp
= xfrma
[XFRMA_REPLAY_VAL
-1];
1543 struct rtattr
*lt
= xfrma
[XFRMA_LTIME_VAL
-1];
1548 /* pedantic mode - thou shalt sayeth replaceth */
1549 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1552 x
= xfrm_state_lookup(&p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1556 if (x
->km
.state
!= XFRM_STATE_VALID
)
1559 spin_lock_bh(&x
->lock
);
1560 err
= xfrm_update_ae_params(x
, xfrma
);
1561 spin_unlock_bh(&x
->lock
);
1565 c
.event
= nlh
->nlmsg_type
;
1566 c
.seq
= nlh
->nlmsg_seq
;
1567 c
.pid
= nlh
->nlmsg_pid
;
1568 c
.data
.aevent
= XFRM_AE_CU
;
1569 km_state_notify(x
, &c
);
1576 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1577 struct rtattr
**xfrma
)
1580 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1582 struct xfrm_audit audit_info
;
1584 err
= copy_from_user_policy_type(&type
, xfrma
);
1588 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1589 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1590 err
= xfrm_policy_flush(type
, &audit_info
);
1594 c
.event
= nlh
->nlmsg_type
;
1595 c
.seq
= nlh
->nlmsg_seq
;
1596 c
.pid
= nlh
->nlmsg_pid
;
1597 km_policy_notify(NULL
, 0, &c
);
1601 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1602 struct rtattr
**xfrma
)
1604 struct xfrm_policy
*xp
;
1605 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
1606 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1607 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1610 err
= copy_from_user_policy_type(&type
, xfrma
);
1615 xp
= xfrm_policy_byid(type
, p
->dir
, p
->index
, 0, &err
);
1617 struct rtattr
*rt
= xfrma
[XFRMA_SEC_CTX
-1];
1618 struct xfrm_policy tmp
;
1620 err
= verify_sec_ctx_len(xfrma
);
1624 memset(&tmp
, 0, sizeof(struct xfrm_policy
));
1626 struct xfrm_user_sec_ctx
*uctx
= RTA_DATA(rt
);
1628 if ((err
= security_xfrm_policy_alloc(&tmp
, uctx
)))
1631 xp
= xfrm_policy_bysel_ctx(type
, p
->dir
, &p
->sel
, tmp
.security
,
1633 security_xfrm_policy_free(&tmp
);
1638 read_lock(&xp
->lock
);
1640 read_unlock(&xp
->lock
);
1644 read_unlock(&xp
->lock
);
1647 xfrm_policy_delete(xp
, p
->dir
);
1648 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1649 AUDIT_MAC_IPSEC_DELSPD
, 1, xp
, NULL
);
1652 // reset the timers here?
1653 printk("Dont know what to do with soft policy expire\n");
1655 km_policy_expired(xp
, p
->dir
, up
->hard
, current
->pid
);
1662 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1663 struct rtattr
**xfrma
)
1665 struct xfrm_state
*x
;
1667 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
1668 struct xfrm_usersa_info
*p
= &ue
->state
;
1670 x
= xfrm_state_lookup(&p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
1676 spin_lock_bh(&x
->lock
);
1678 if (x
->km
.state
!= XFRM_STATE_VALID
)
1680 km_state_expired(x
, ue
->hard
, current
->pid
);
1683 __xfrm_state_delete(x
);
1684 xfrm_audit_log(NETLINK_CB(skb
).loginuid
, NETLINK_CB(skb
).sid
,
1685 AUDIT_MAC_IPSEC_DELSA
, 1, NULL
, x
);
1689 spin_unlock_bh(&x
->lock
);
1694 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1695 struct rtattr
**xfrma
)
1697 struct xfrm_policy
*xp
;
1698 struct xfrm_user_tmpl
*ut
;
1700 struct rtattr
*rt
= xfrma
[XFRMA_TMPL
-1];
1702 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
1703 struct xfrm_state
*x
= xfrm_state_alloc();
1709 err
= verify_newpolicy_info(&ua
->policy
);
1711 printk("BAD policy passed\n");
1717 xp
= xfrm_policy_construct(&ua
->policy
, (struct rtattr
**) xfrma
, &err
);
1723 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
1724 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
1725 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
1728 /* extract the templates and for each call km_key */
1729 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
1730 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1731 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
1732 x
->props
.mode
= t
->mode
;
1733 x
->props
.reqid
= t
->reqid
;
1734 x
->props
.family
= ut
->family
;
1735 t
->aalgos
= ua
->aalgos
;
1736 t
->ealgos
= ua
->ealgos
;
1737 t
->calgos
= ua
->calgos
;
1738 err
= km_query(x
, t
, xp
);
1748 #ifdef CONFIG_XFRM_MIGRATE
1749 static int verify_user_migrate(struct rtattr
**xfrma
)
1751 struct rtattr
*rt
= xfrma
[XFRMA_MIGRATE
-1];
1752 struct xfrm_user_migrate
*um
;
1757 if ((rt
->rta_len
- sizeof(*rt
)) < sizeof(*um
))
1763 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
1764 struct rtattr
**xfrma
, int *num
)
1766 struct rtattr
*rt
= xfrma
[XFRMA_MIGRATE
-1];
1767 struct xfrm_user_migrate
*um
;
1771 num_migrate
= (rt
->rta_len
- sizeof(*rt
)) / sizeof(*um
);
1773 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
1776 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
1777 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
1778 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
1779 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
1780 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
1782 ma
->proto
= um
->proto
;
1783 ma
->mode
= um
->mode
;
1784 ma
->reqid
= um
->reqid
;
1786 ma
->old_family
= um
->old_family
;
1787 ma
->new_family
= um
->new_family
;
1794 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1795 struct rtattr
**xfrma
)
1797 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
1798 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
1803 err
= verify_user_migrate((struct rtattr
**)xfrma
);
1807 err
= copy_from_user_policy_type(&type
, (struct rtattr
**)xfrma
);
1811 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
,
1812 (struct rtattr
**)xfrma
, &n
);
1819 xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
);
1824 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1825 struct rtattr
**xfrma
)
1827 return -ENOPROTOOPT
;
1831 #ifdef CONFIG_XFRM_MIGRATE
1832 static int copy_to_user_migrate(struct xfrm_migrate
*m
, struct sk_buff
*skb
)
1834 struct xfrm_user_migrate um
;
1836 memset(&um
, 0, sizeof(um
));
1837 um
.proto
= m
->proto
;
1839 um
.reqid
= m
->reqid
;
1840 um
.old_family
= m
->old_family
;
1841 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
1842 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
1843 um
.new_family
= m
->new_family
;
1844 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
1845 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
1847 RTA_PUT(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
1854 static int build_migrate(struct sk_buff
*skb
, struct xfrm_migrate
*m
,
1855 int num_migrate
, struct xfrm_selector
*sel
,
1858 struct xfrm_migrate
*mp
;
1859 struct xfrm_userpolicy_id
*pol_id
;
1860 struct nlmsghdr
*nlh
;
1863 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
1867 pol_id
= nlmsg_data(nlh
);
1868 /* copy data from selector, dir, and type to the pol_id */
1869 memset(pol_id
, 0, sizeof(*pol_id
));
1870 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
1873 if (copy_to_user_policy_type(type
, skb
) < 0)
1876 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
1877 if (copy_to_user_migrate(mp
, skb
) < 0)
1881 return nlmsg_end(skb
, nlh
);
1883 nlmsg_cancel(skb
, nlh
);
1887 static int xfrm_send_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1888 struct xfrm_migrate
*m
, int num_migrate
)
1890 struct sk_buff
*skb
;
1893 len
= RTA_SPACE(sizeof(struct xfrm_user_migrate
) * num_migrate
);
1894 len
+= NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id
));
1895 #ifdef CONFIG_XFRM_SUB_POLICY
1896 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
1898 skb
= alloc_skb(len
, GFP_ATOMIC
);
1903 if (build_migrate(skb
, m
, num_migrate
, sel
, dir
, type
) < 0)
1906 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_MIGRATE
;
1907 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_MIGRATE
,
1911 static int xfrm_send_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1912 struct xfrm_migrate
*m
, int num_migrate
)
1914 return -ENOPROTOOPT
;
1918 #define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type))
1920 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
1921 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1922 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1923 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
1924 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1925 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1926 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1927 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
1928 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
1929 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
1930 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
1931 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
1932 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
1933 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
1934 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = NLMSG_LENGTH(0),
1935 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
1936 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
1937 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
1938 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
1939 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = NLMSG_LENGTH(sizeof(u32
)),
1940 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = NLMSG_LENGTH(sizeof(u32
)),
1945 static struct xfrm_link
{
1946 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct rtattr
**);
1947 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
1948 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
1949 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1950 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
1951 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
1952 .dump
= xfrm_dump_sa
},
1953 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1954 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
1955 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
1956 .dump
= xfrm_dump_policy
},
1957 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
1958 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
1959 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
1960 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
1961 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
1962 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
1963 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
1964 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
1965 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
1966 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
1967 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
1968 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
1969 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
1972 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
1974 struct rtattr
*xfrma
[XFRMA_MAX
];
1975 struct xfrm_link
*link
;
1978 type
= nlh
->nlmsg_type
;
1979 if (type
> XFRM_MSG_MAX
)
1982 type
-= XFRM_MSG_BASE
;
1983 link
= &xfrm_dispatch
[type
];
1985 /* All operations require privileges, even GET */
1986 if (security_netlink_recv(skb
, CAP_NET_ADMIN
))
1989 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
1990 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
1991 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
1992 if (link
->dump
== NULL
)
1995 return netlink_dump_start(xfrm_nl
, skb
, nlh
, link
->dump
, NULL
);
1998 memset(xfrma
, 0, sizeof(xfrma
));
2000 if (nlh
->nlmsg_len
< (min_len
= xfrm_msg_min
[type
]))
2003 if (nlh
->nlmsg_len
> min_len
) {
2004 int attrlen
= nlh
->nlmsg_len
- NLMSG_ALIGN(min_len
);
2005 struct rtattr
*attr
= (void *) nlh
+ NLMSG_ALIGN(min_len
);
2007 while (RTA_OK(attr
, attrlen
)) {
2008 unsigned short flavor
= attr
->rta_type
;
2010 if (flavor
> XFRMA_MAX
)
2012 xfrma
[flavor
- 1] = attr
;
2014 attr
= RTA_NEXT(attr
, attrlen
);
2018 if (link
->doit
== NULL
)
2021 return link
->doit(skb
, nlh
, xfrma
);
2024 static void xfrm_netlink_rcv(struct sock
*sk
, int len
)
2026 unsigned int qlen
= 0;
2029 mutex_lock(&xfrm_cfg_mutex
);
2030 netlink_run_queue(sk
, &qlen
, &xfrm_user_rcv_msg
);
2031 mutex_unlock(&xfrm_cfg_mutex
);
2036 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
2038 struct xfrm_user_expire
*ue
;
2039 struct nlmsghdr
*nlh
;
2041 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2045 ue
= nlmsg_data(nlh
);
2046 copy_to_user_state(x
, &ue
->state
);
2047 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2049 return nlmsg_end(skb
, nlh
);
2052 static int xfrm_exp_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2054 struct sk_buff
*skb
;
2055 int len
= NLMSG_LENGTH(sizeof(struct xfrm_user_expire
));
2057 skb
= alloc_skb(len
, GFP_ATOMIC
);
2061 if (build_expire(skb
, x
, c
) < 0)
2064 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
2065 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2068 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2070 struct sk_buff
*skb
;
2071 int len
= NLMSG_LENGTH(sizeof(struct xfrm_aevent_id
));
2073 len
+= RTA_SPACE(sizeof(struct xfrm_replay_state
));
2074 len
+= RTA_SPACE(sizeof(struct xfrm_lifetime_cur
));
2075 skb
= alloc_skb(len
, GFP_ATOMIC
);
2079 if (build_aevent(skb
, x
, c
) < 0)
2082 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_AEVENTS
;
2083 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
2086 static int xfrm_notify_sa_flush(struct km_event
*c
)
2088 struct xfrm_usersa_flush
*p
;
2089 struct nlmsghdr
*nlh
;
2090 struct sk_buff
*skb
;
2091 int len
= NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush
));
2093 skb
= alloc_skb(len
, GFP_ATOMIC
);
2097 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2103 p
= nlmsg_data(nlh
);
2104 p
->proto
= c
->data
.proto
;
2106 nlmsg_end(skb
, nlh
);
2108 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
2109 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2112 static inline int xfrm_sa_len(struct xfrm_state
*x
)
2116 l
+= RTA_SPACE(sizeof(*x
->aalg
) + (x
->aalg
->alg_key_len
+7)/8);
2118 l
+= RTA_SPACE(sizeof(*x
->ealg
) + (x
->ealg
->alg_key_len
+7)/8);
2120 l
+= RTA_SPACE(sizeof(*x
->calg
));
2122 l
+= RTA_SPACE(sizeof(*x
->encap
));
2127 static int xfrm_notify_sa(struct xfrm_state
*x
, struct km_event
*c
)
2129 struct xfrm_usersa_info
*p
;
2130 struct xfrm_usersa_id
*id
;
2131 struct nlmsghdr
*nlh
;
2132 struct sk_buff
*skb
;
2133 int len
= xfrm_sa_len(x
);
2136 headlen
= sizeof(*p
);
2137 if (c
->event
== XFRM_MSG_DELSA
) {
2138 len
+= RTA_SPACE(headlen
);
2139 headlen
= sizeof(*id
);
2141 len
+= NLMSG_SPACE(headlen
);
2143 skb
= alloc_skb(len
, GFP_ATOMIC
);
2147 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2151 p
= nlmsg_data(nlh
);
2152 if (c
->event
== XFRM_MSG_DELSA
) {
2153 id
= nlmsg_data(nlh
);
2154 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2155 id
->spi
= x
->id
.spi
;
2156 id
->family
= x
->props
.family
;
2157 id
->proto
= x
->id
.proto
;
2159 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_SA
, sizeof(*p
)));
2162 copy_to_user_state(x
, p
);
2165 RTA_PUT(skb
, XFRMA_ALG_AUTH
,
2166 sizeof(*(x
->aalg
))+(x
->aalg
->alg_key_len
+7)/8, x
->aalg
);
2168 RTA_PUT(skb
, XFRMA_ALG_CRYPT
,
2169 sizeof(*(x
->ealg
))+(x
->ealg
->alg_key_len
+7)/8, x
->ealg
);
2171 RTA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
2174 RTA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
2176 nlmsg_end(skb
, nlh
);
2178 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_SA
;
2179 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2187 static int xfrm_send_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2191 case XFRM_MSG_EXPIRE
:
2192 return xfrm_exp_state_notify(x
, c
);
2193 case XFRM_MSG_NEWAE
:
2194 return xfrm_aevent_state_notify(x
, c
);
2195 case XFRM_MSG_DELSA
:
2196 case XFRM_MSG_UPDSA
:
2197 case XFRM_MSG_NEWSA
:
2198 return xfrm_notify_sa(x
, c
);
2199 case XFRM_MSG_FLUSHSA
:
2200 return xfrm_notify_sa_flush(c
);
2202 printk("xfrm_user: Unknown SA event %d\n", c
->event
);
2210 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2211 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
2214 struct xfrm_user_acquire
*ua
;
2215 struct nlmsghdr
*nlh
;
2216 __u32 seq
= xfrm_get_acqseq();
2218 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2222 ua
= nlmsg_data(nlh
);
2223 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2224 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2225 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2226 copy_to_user_policy(xp
, &ua
->policy
, dir
);
2227 ua
->aalgos
= xt
->aalgos
;
2228 ua
->ealgos
= xt
->ealgos
;
2229 ua
->calgos
= xt
->calgos
;
2230 ua
->seq
= x
->km
.seq
= seq
;
2232 if (copy_to_user_tmpl(xp
, skb
) < 0)
2234 if (copy_to_user_state_sec_ctx(x
, skb
))
2236 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2239 return nlmsg_end(skb
, nlh
);
2242 nlmsg_cancel(skb
, nlh
);
2246 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2247 struct xfrm_policy
*xp
, int dir
)
2249 struct sk_buff
*skb
;
2252 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2253 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_acquire
));
2254 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(x
->security
));
2255 #ifdef CONFIG_XFRM_SUB_POLICY
2256 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2258 skb
= alloc_skb(len
, GFP_ATOMIC
);
2262 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
2265 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_ACQUIRE
;
2266 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
2269 /* User gives us xfrm_user_policy_info followed by an array of 0
2270 * or more templates.
2272 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2273 u8
*data
, int len
, int *dir
)
2275 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2276 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2277 struct xfrm_policy
*xp
;
2280 switch (sk
->sk_family
) {
2282 if (opt
!= IP_XFRM_POLICY
) {
2287 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2289 if (opt
!= IPV6_XFRM_POLICY
) {
2302 if (len
< sizeof(*p
) ||
2303 verify_newpolicy_info(p
))
2306 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2307 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2310 if (p
->dir
> XFRM_POLICY_OUT
)
2313 xp
= xfrm_policy_alloc(GFP_KERNEL
);
2319 copy_from_user_policy(xp
, p
);
2320 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2321 copy_templates(xp
, ut
, nr
);
2328 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2329 int dir
, struct km_event
*c
)
2331 struct xfrm_user_polexpire
*upe
;
2332 struct nlmsghdr
*nlh
;
2333 int hard
= c
->data
.hard
;
2335 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2339 upe
= nlmsg_data(nlh
);
2340 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2341 if (copy_to_user_tmpl(xp
, skb
) < 0)
2343 if (copy_to_user_sec_ctx(xp
, skb
))
2345 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2349 return nlmsg_end(skb
, nlh
);
2352 nlmsg_cancel(skb
, nlh
);
2356 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2358 struct sk_buff
*skb
;
2361 len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2362 len
+= NLMSG_SPACE(sizeof(struct xfrm_user_polexpire
));
2363 len
+= RTA_SPACE(xfrm_user_sec_ctx_size(xp
->security
));
2364 #ifdef CONFIG_XFRM_SUB_POLICY
2365 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2367 skb
= alloc_skb(len
, GFP_ATOMIC
);
2371 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2374 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_EXPIRE
;
2375 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2378 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2380 struct xfrm_userpolicy_info
*p
;
2381 struct xfrm_userpolicy_id
*id
;
2382 struct nlmsghdr
*nlh
;
2383 struct sk_buff
*skb
;
2384 int len
= RTA_SPACE(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2387 headlen
= sizeof(*p
);
2388 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2389 len
+= RTA_SPACE(headlen
);
2390 headlen
= sizeof(*id
);
2392 #ifdef CONFIG_XFRM_SUB_POLICY
2393 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2395 len
+= NLMSG_SPACE(headlen
);
2397 skb
= alloc_skb(len
, GFP_ATOMIC
);
2401 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2405 p
= nlmsg_data(nlh
);
2406 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2407 id
= nlmsg_data(nlh
);
2408 memset(id
, 0, sizeof(*id
));
2411 id
->index
= xp
->index
;
2413 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2415 p
= RTA_DATA(__RTA_PUT(skb
, XFRMA_POLICY
, sizeof(*p
)));
2418 copy_to_user_policy(xp
, p
, dir
);
2419 if (copy_to_user_tmpl(xp
, skb
) < 0)
2421 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2424 nlmsg_end(skb
, nlh
);
2426 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
2427 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2435 static int xfrm_notify_policy_flush(struct km_event
*c
)
2437 struct nlmsghdr
*nlh
;
2438 struct sk_buff
*skb
;
2440 #ifdef CONFIG_XFRM_SUB_POLICY
2441 len
+= RTA_SPACE(sizeof(struct xfrm_userpolicy_type
));
2443 len
+= NLMSG_LENGTH(0);
2445 skb
= alloc_skb(len
, GFP_ATOMIC
);
2449 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
2452 if (copy_to_user_policy_type(c
->data
.type
, skb
) < 0)
2455 nlmsg_end(skb
, nlh
);
2457 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_POLICY
;
2458 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2465 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2469 case XFRM_MSG_NEWPOLICY
:
2470 case XFRM_MSG_UPDPOLICY
:
2471 case XFRM_MSG_DELPOLICY
:
2472 return xfrm_notify_policy(xp
, dir
, c
);
2473 case XFRM_MSG_FLUSHPOLICY
:
2474 return xfrm_notify_policy_flush(c
);
2475 case XFRM_MSG_POLEXPIRE
:
2476 return xfrm_exp_policy_notify(xp
, dir
, c
);
2478 printk("xfrm_user: Unknown Policy event %d\n", c
->event
);
2485 static int build_report(struct sk_buff
*skb
, u8 proto
,
2486 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2488 struct xfrm_user_report
*ur
;
2489 struct nlmsghdr
*nlh
;
2491 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
2495 ur
= nlmsg_data(nlh
);
2497 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2500 RTA_PUT(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2502 return nlmsg_end(skb
, nlh
);
2505 nlmsg_cancel(skb
, nlh
);
2509 static int xfrm_send_report(u8 proto
, struct xfrm_selector
*sel
,
2510 xfrm_address_t
*addr
)
2512 struct sk_buff
*skb
;
2515 len
= NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report
)));
2516 skb
= alloc_skb(len
, GFP_ATOMIC
);
2520 if (build_report(skb
, proto
, sel
, addr
) < 0)
2523 NETLINK_CB(skb
).dst_group
= XFRMNLGRP_REPORT
;
2524 return netlink_broadcast(xfrm_nl
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2527 static struct xfrm_mgr netlink_mgr
= {
2529 .notify
= xfrm_send_state_notify
,
2530 .acquire
= xfrm_send_acquire
,
2531 .compile_policy
= xfrm_compile_policy
,
2532 .notify_policy
= xfrm_send_policy_notify
,
2533 .report
= xfrm_send_report
,
2534 .migrate
= xfrm_send_migrate
,
2537 static int __init
xfrm_user_init(void)
2541 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
2543 nlsk
= netlink_kernel_create(NETLINK_XFRM
, XFRMNLGRP_MAX
,
2544 xfrm_netlink_rcv
, NULL
, THIS_MODULE
);
2547 rcu_assign_pointer(xfrm_nl
, nlsk
);
2549 xfrm_register_km(&netlink_mgr
);
2554 static void __exit
xfrm_user_exit(void)
2556 struct sock
*nlsk
= xfrm_nl
;
2558 xfrm_unregister_km(&netlink_mgr
);
2559 rcu_assign_pointer(xfrm_nl
, NULL
);
2561 sock_release(nlsk
->sk_socket
);
2564 module_init(xfrm_user_init
);
2565 module_exit(xfrm_user_exit
);
2566 MODULE_LICENSE("GPL");
2567 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);