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/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
30 #include <linux/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
34 #include <asm/unaligned.h>
36 static int verify_one_alg(struct nlattr
**attrs
, enum xfrm_attr_type_t type
)
38 struct nlattr
*rt
= attrs
[type
];
39 struct xfrm_algo
*algp
;
45 if (nla_len(rt
) < xfrm_alg_len(algp
))
58 algp
->alg_name
[sizeof(algp
->alg_name
) - 1] = '\0';
62 static int verify_auth_trunc(struct nlattr
**attrs
)
64 struct nlattr
*rt
= attrs
[XFRMA_ALG_AUTH_TRUNC
];
65 struct xfrm_algo_auth
*algp
;
71 if (nla_len(rt
) < xfrm_alg_auth_len(algp
))
74 algp
->alg_name
[sizeof(algp
->alg_name
) - 1] = '\0';
78 static int verify_aead(struct nlattr
**attrs
)
80 struct nlattr
*rt
= attrs
[XFRMA_ALG_AEAD
];
81 struct xfrm_algo_aead
*algp
;
87 if (nla_len(rt
) < aead_len(algp
))
90 algp
->alg_name
[sizeof(algp
->alg_name
) - 1] = '\0';
94 static void verify_one_addr(struct nlattr
**attrs
, enum xfrm_attr_type_t type
,
95 xfrm_address_t
**addrp
)
97 struct nlattr
*rt
= attrs
[type
];
100 *addrp
= nla_data(rt
);
103 static inline int verify_sec_ctx_len(struct nlattr
**attrs
)
105 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
106 struct xfrm_user_sec_ctx
*uctx
;
112 if (uctx
->len
!= (sizeof(struct xfrm_user_sec_ctx
) + uctx
->ctx_len
))
118 static inline int verify_replay(struct xfrm_usersa_info
*p
,
119 struct nlattr
**attrs
)
121 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_ESN_VAL
];
122 struct xfrm_replay_state_esn
*rs
;
124 if (p
->flags
& XFRM_STATE_ESN
) {
130 if (rs
->bmp_len
> XFRMA_REPLAY_ESN_MAX
/ sizeof(rs
->bmp
[0]) / 8)
133 if (nla_len(rt
) < xfrm_replay_state_esn_len(rs
) &&
134 nla_len(rt
) != sizeof(*rs
))
141 /* As only ESP and AH support ESN feature. */
142 if ((p
->id
.proto
!= IPPROTO_ESP
) && (p
->id
.proto
!= IPPROTO_AH
))
145 if (p
->replay_window
!= 0)
151 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
152 struct nlattr
**attrs
)
162 #if IS_ENABLED(CONFIG_IPV6)
174 switch (p
->id
.proto
) {
176 if ((!attrs
[XFRMA_ALG_AUTH
] &&
177 !attrs
[XFRMA_ALG_AUTH_TRUNC
]) ||
178 attrs
[XFRMA_ALG_AEAD
] ||
179 attrs
[XFRMA_ALG_CRYPT
] ||
180 attrs
[XFRMA_ALG_COMP
] ||
186 if (attrs
[XFRMA_ALG_COMP
])
188 if (!attrs
[XFRMA_ALG_AUTH
] &&
189 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
190 !attrs
[XFRMA_ALG_CRYPT
] &&
191 !attrs
[XFRMA_ALG_AEAD
])
193 if ((attrs
[XFRMA_ALG_AUTH
] ||
194 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
195 attrs
[XFRMA_ALG_CRYPT
]) &&
196 attrs
[XFRMA_ALG_AEAD
])
198 if (attrs
[XFRMA_TFCPAD
] &&
199 p
->mode
!= XFRM_MODE_TUNNEL
)
204 if (!attrs
[XFRMA_ALG_COMP
] ||
205 attrs
[XFRMA_ALG_AEAD
] ||
206 attrs
[XFRMA_ALG_AUTH
] ||
207 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
208 attrs
[XFRMA_ALG_CRYPT
] ||
209 attrs
[XFRMA_TFCPAD
] ||
210 (ntohl(p
->id
.spi
) >= 0x10000))
214 #if IS_ENABLED(CONFIG_IPV6)
215 case IPPROTO_DSTOPTS
:
216 case IPPROTO_ROUTING
:
217 if (attrs
[XFRMA_ALG_COMP
] ||
218 attrs
[XFRMA_ALG_AUTH
] ||
219 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
220 attrs
[XFRMA_ALG_AEAD
] ||
221 attrs
[XFRMA_ALG_CRYPT
] ||
222 attrs
[XFRMA_ENCAP
] ||
223 attrs
[XFRMA_SEC_CTX
] ||
224 attrs
[XFRMA_TFCPAD
] ||
225 !attrs
[XFRMA_COADDR
])
234 if ((err
= verify_aead(attrs
)))
236 if ((err
= verify_auth_trunc(attrs
)))
238 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_AUTH
)))
240 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_CRYPT
)))
242 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_COMP
)))
244 if ((err
= verify_sec_ctx_len(attrs
)))
246 if ((err
= verify_replay(p
, attrs
)))
251 case XFRM_MODE_TRANSPORT
:
252 case XFRM_MODE_TUNNEL
:
253 case XFRM_MODE_ROUTEOPTIMIZATION
:
267 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
268 struct xfrm_algo_desc
*(*get_byname
)(const char *, int),
271 struct xfrm_algo
*p
, *ualg
;
272 struct xfrm_algo_desc
*algo
;
277 ualg
= nla_data(rta
);
279 algo
= get_byname(ualg
->alg_name
, 1);
282 *props
= algo
->desc
.sadb_alg_id
;
284 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
288 strcpy(p
->alg_name
, algo
->name
);
293 static int attach_crypt(struct xfrm_state
*x
, struct nlattr
*rta
)
295 struct xfrm_algo
*p
, *ualg
;
296 struct xfrm_algo_desc
*algo
;
301 ualg
= nla_data(rta
);
303 algo
= xfrm_ealg_get_byname(ualg
->alg_name
, 1);
306 x
->props
.ealgo
= algo
->desc
.sadb_alg_id
;
308 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
312 strcpy(p
->alg_name
, algo
->name
);
314 x
->geniv
= algo
->uinfo
.encr
.geniv
;
318 static int attach_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
321 struct xfrm_algo
*ualg
;
322 struct xfrm_algo_auth
*p
;
323 struct xfrm_algo_desc
*algo
;
328 ualg
= nla_data(rta
);
330 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
333 *props
= algo
->desc
.sadb_alg_id
;
335 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
339 strcpy(p
->alg_name
, algo
->name
);
340 p
->alg_key_len
= ualg
->alg_key_len
;
341 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
342 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
348 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
351 struct xfrm_algo_auth
*p
, *ualg
;
352 struct xfrm_algo_desc
*algo
;
357 ualg
= nla_data(rta
);
359 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
362 if (ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
364 *props
= algo
->desc
.sadb_alg_id
;
366 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
370 strcpy(p
->alg_name
, algo
->name
);
371 if (!p
->alg_trunc_len
)
372 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
378 static int attach_aead(struct xfrm_state
*x
, struct nlattr
*rta
)
380 struct xfrm_algo_aead
*p
, *ualg
;
381 struct xfrm_algo_desc
*algo
;
386 ualg
= nla_data(rta
);
388 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
391 x
->props
.ealgo
= algo
->desc
.sadb_alg_id
;
393 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
397 strcpy(p
->alg_name
, algo
->name
);
399 x
->geniv
= algo
->uinfo
.aead
.geniv
;
403 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn
*replay_esn
,
406 struct xfrm_replay_state_esn
*up
;
409 if (!replay_esn
|| !rp
)
413 ulen
= xfrm_replay_state_esn_len(up
);
415 /* Check the overall length and the internal bitmap length to avoid
416 * potential overflow. */
417 if (nla_len(rp
) < ulen
||
418 xfrm_replay_state_esn_len(replay_esn
) != ulen
||
419 replay_esn
->bmp_len
!= up
->bmp_len
)
422 if (up
->replay_window
> up
->bmp_len
* sizeof(__u32
) * 8)
428 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn
**replay_esn
,
429 struct xfrm_replay_state_esn
**preplay_esn
,
432 struct xfrm_replay_state_esn
*p
, *pp
, *up
;
439 klen
= xfrm_replay_state_esn_len(up
);
440 ulen
= nla_len(rta
) >= klen
? klen
: sizeof(*up
);
442 p
= kzalloc(klen
, GFP_KERNEL
);
446 pp
= kzalloc(klen
, GFP_KERNEL
);
453 memcpy(pp
, up
, ulen
);
461 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
466 len
+= sizeof(struct xfrm_user_sec_ctx
);
467 len
+= xfrm_ctx
->ctx_len
;
472 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
474 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
475 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
476 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
477 x
->props
.mode
= p
->mode
;
478 x
->props
.replay_window
= min_t(unsigned int, p
->replay_window
,
479 sizeof(x
->replay
.bitmap
) * 8);
480 x
->props
.reqid
= p
->reqid
;
481 x
->props
.family
= p
->family
;
482 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
483 x
->props
.flags
= p
->flags
;
485 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
486 x
->sel
.family
= p
->family
;
490 * someday when pfkey also has support, we could have the code
491 * somehow made shareable and move it to xfrm_state.c - JHS
494 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
,
497 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
498 struct nlattr
*re
= update_esn
? attrs
[XFRMA_REPLAY_ESN_VAL
] : NULL
;
499 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
500 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
501 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
504 struct xfrm_replay_state_esn
*replay_esn
;
505 replay_esn
= nla_data(re
);
506 memcpy(x
->replay_esn
, replay_esn
,
507 xfrm_replay_state_esn_len(replay_esn
));
508 memcpy(x
->preplay_esn
, replay_esn
,
509 xfrm_replay_state_esn_len(replay_esn
));
513 struct xfrm_replay_state
*replay
;
514 replay
= nla_data(rp
);
515 memcpy(&x
->replay
, replay
, sizeof(*replay
));
516 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
520 struct xfrm_lifetime_cur
*ltime
;
521 ltime
= nla_data(lt
);
522 x
->curlft
.bytes
= ltime
->bytes
;
523 x
->curlft
.packets
= ltime
->packets
;
524 x
->curlft
.add_time
= ltime
->add_time
;
525 x
->curlft
.use_time
= ltime
->use_time
;
529 x
->replay_maxage
= nla_get_u32(et
);
532 x
->replay_maxdiff
= nla_get_u32(rt
);
535 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
536 struct xfrm_usersa_info
*p
,
537 struct nlattr
**attrs
,
540 struct xfrm_state
*x
= xfrm_state_alloc(net
);
546 copy_from_user_state(x
, p
);
548 if (attrs
[XFRMA_SA_EXTRA_FLAGS
])
549 x
->props
.extra_flags
= nla_get_u32(attrs
[XFRMA_SA_EXTRA_FLAGS
]);
551 if ((err
= attach_aead(x
, attrs
[XFRMA_ALG_AEAD
])))
553 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
554 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
556 if (!x
->props
.aalgo
) {
557 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
558 attrs
[XFRMA_ALG_AUTH
])))
561 if ((err
= attach_crypt(x
, attrs
[XFRMA_ALG_CRYPT
])))
563 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
564 xfrm_calg_get_byname
,
565 attrs
[XFRMA_ALG_COMP
])))
568 if (attrs
[XFRMA_ENCAP
]) {
569 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
570 sizeof(*x
->encap
), GFP_KERNEL
);
571 if (x
->encap
== NULL
)
575 if (attrs
[XFRMA_TFCPAD
])
576 x
->tfcpad
= nla_get_u32(attrs
[XFRMA_TFCPAD
]);
578 if (attrs
[XFRMA_COADDR
]) {
579 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
580 sizeof(*x
->coaddr
), GFP_KERNEL
);
581 if (x
->coaddr
== NULL
)
585 xfrm_mark_get(attrs
, &x
->mark
);
587 err
= __xfrm_init_state(x
, false);
591 if (attrs
[XFRMA_SEC_CTX
]) {
592 err
= security_xfrm_state_alloc(x
,
593 nla_data(attrs
[XFRMA_SEC_CTX
]));
598 if (attrs
[XFRMA_OFFLOAD_DEV
]) {
599 err
= xfrm_dev_state_add(net
, x
,
600 nla_data(attrs
[XFRMA_OFFLOAD_DEV
]));
605 if ((err
= xfrm_alloc_replay_state_esn(&x
->replay_esn
, &x
->preplay_esn
,
606 attrs
[XFRMA_REPLAY_ESN_VAL
])))
610 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
611 /* sysctl_xfrm_aevent_etime is in 100ms units */
612 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
614 if ((err
= xfrm_init_replay(x
)))
617 /* override default values from above */
618 xfrm_update_ae_params(x
, attrs
, 0);
623 x
->km
.state
= XFRM_STATE_DEAD
;
630 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
631 struct nlattr
**attrs
)
633 struct net
*net
= sock_net(skb
->sk
);
634 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
635 struct xfrm_state
*x
;
639 err
= verify_newsa_info(p
, attrs
);
643 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
648 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
649 err
= xfrm_state_add(x
);
651 err
= xfrm_state_update(x
);
653 xfrm_audit_state_add(x
, err
? 0 : 1, true);
656 x
->km
.state
= XFRM_STATE_DEAD
;
661 c
.seq
= nlh
->nlmsg_seq
;
662 c
.portid
= nlh
->nlmsg_pid
;
663 c
.event
= nlh
->nlmsg_type
;
665 km_state_notify(x
, &c
);
671 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
672 struct xfrm_usersa_id
*p
,
673 struct nlattr
**attrs
,
676 struct xfrm_state
*x
= NULL
;
679 u32 mark
= xfrm_mark_get(attrs
, &m
);
681 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
683 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
685 xfrm_address_t
*saddr
= NULL
;
687 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
694 x
= xfrm_state_lookup_byaddr(net
, mark
,
696 p
->proto
, p
->family
);
705 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
706 struct nlattr
**attrs
)
708 struct net
*net
= sock_net(skb
->sk
);
709 struct xfrm_state
*x
;
712 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
714 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
718 if ((err
= security_xfrm_state_delete(x
)) != 0)
721 if (xfrm_state_kern(x
)) {
726 err
= xfrm_state_delete(x
);
731 c
.seq
= nlh
->nlmsg_seq
;
732 c
.portid
= nlh
->nlmsg_pid
;
733 c
.event
= nlh
->nlmsg_type
;
734 km_state_notify(x
, &c
);
737 xfrm_audit_state_delete(x
, err
? 0 : 1, true);
742 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
744 memset(p
, 0, sizeof(*p
));
745 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
746 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
747 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
748 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
749 put_unaligned(x
->stats
.replay_window
, &p
->stats
.replay_window
);
750 put_unaligned(x
->stats
.replay
, &p
->stats
.replay
);
751 put_unaligned(x
->stats
.integrity_failed
, &p
->stats
.integrity_failed
);
752 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
753 p
->mode
= x
->props
.mode
;
754 p
->replay_window
= x
->props
.replay_window
;
755 p
->reqid
= x
->props
.reqid
;
756 p
->family
= x
->props
.family
;
757 p
->flags
= x
->props
.flags
;
761 struct xfrm_dump_info
{
762 struct sk_buff
*in_skb
;
763 struct sk_buff
*out_skb
;
768 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
770 struct xfrm_user_sec_ctx
*uctx
;
772 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
774 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
778 uctx
= nla_data(attr
);
779 uctx
->exttype
= XFRMA_SEC_CTX
;
780 uctx
->len
= ctx_size
;
781 uctx
->ctx_doi
= s
->ctx_doi
;
782 uctx
->ctx_alg
= s
->ctx_alg
;
783 uctx
->ctx_len
= s
->ctx_len
;
784 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
789 static int copy_user_offload(struct xfrm_state_offload
*xso
, struct sk_buff
*skb
)
791 struct xfrm_user_offload
*xuo
;
794 attr
= nla_reserve(skb
, XFRMA_OFFLOAD_DEV
, sizeof(*xuo
));
798 xuo
= nla_data(attr
);
799 memset(xuo
, 0, sizeof(*xuo
));
800 xuo
->ifindex
= xso
->dev
->ifindex
;
801 xuo
->flags
= xso
->flags
;
806 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
808 struct xfrm_algo
*algo
;
811 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
812 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
816 algo
= nla_data(nla
);
817 strncpy(algo
->alg_name
, auth
->alg_name
, sizeof(algo
->alg_name
));
818 memcpy(algo
->alg_key
, auth
->alg_key
, (auth
->alg_key_len
+ 7) / 8);
819 algo
->alg_key_len
= auth
->alg_key_len
;
824 /* Don't change this without updating xfrm_sa_len! */
825 static int copy_to_user_state_extra(struct xfrm_state
*x
,
826 struct xfrm_usersa_info
*p
,
831 copy_to_user_state(x
, p
);
833 if (x
->props
.extra_flags
) {
834 ret
= nla_put_u32(skb
, XFRMA_SA_EXTRA_FLAGS
,
835 x
->props
.extra_flags
);
841 ret
= nla_put(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
846 ret
= nla_put_u64_64bit(skb
, XFRMA_LASTUSED
, x
->lastused
,
852 ret
= nla_put(skb
, XFRMA_ALG_AEAD
, aead_len(x
->aead
), x
->aead
);
857 ret
= copy_to_user_auth(x
->aalg
, skb
);
859 ret
= nla_put(skb
, XFRMA_ALG_AUTH_TRUNC
,
860 xfrm_alg_auth_len(x
->aalg
), x
->aalg
);
865 ret
= nla_put(skb
, XFRMA_ALG_CRYPT
, xfrm_alg_len(x
->ealg
), x
->ealg
);
870 ret
= nla_put(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
875 ret
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
880 ret
= nla_put_u32(skb
, XFRMA_TFCPAD
, x
->tfcpad
);
884 ret
= xfrm_mark_put(skb
, &x
->mark
);
888 ret
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
889 xfrm_replay_state_esn_len(x
->replay_esn
),
892 ret
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
897 ret
= copy_user_offload(&x
->xso
, skb
);
901 ret
= copy_sec_ctx(x
->security
, skb
);
906 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
908 struct xfrm_dump_info
*sp
= ptr
;
909 struct sk_buff
*in_skb
= sp
->in_skb
;
910 struct sk_buff
*skb
= sp
->out_skb
;
911 struct xfrm_usersa_info
*p
;
912 struct nlmsghdr
*nlh
;
915 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
916 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
922 err
= copy_to_user_state_extra(x
, p
, skb
);
924 nlmsg_cancel(skb
, nlh
);
931 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
933 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
934 struct sock
*sk
= cb
->skb
->sk
;
935 struct net
*net
= sock_net(sk
);
938 xfrm_state_walk_done(walk
, net
);
942 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1];
943 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
945 struct net
*net
= sock_net(skb
->sk
);
946 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
947 struct xfrm_dump_info info
;
949 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
950 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
952 info
.in_skb
= cb
->skb
;
954 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
955 info
.nlmsg_flags
= NLM_F_MULTI
;
958 struct nlattr
*attrs
[XFRMA_MAX
+1];
959 struct xfrm_address_filter
*filter
= NULL
;
963 err
= nlmsg_parse(cb
->nlh
, 0, attrs
, XFRMA_MAX
, xfrma_policy
,
968 if (attrs
[XFRMA_ADDRESS_FILTER
]) {
969 filter
= kmemdup(nla_data(attrs
[XFRMA_ADDRESS_FILTER
]),
970 sizeof(*filter
), GFP_KERNEL
);
975 if (attrs
[XFRMA_PROTO
])
976 proto
= nla_get_u8(attrs
[XFRMA_PROTO
]);
978 xfrm_state_walk_init(walk
, proto
, filter
);
982 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
987 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
988 struct xfrm_state
*x
, u32 seq
)
990 struct xfrm_dump_info info
;
994 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
996 return ERR_PTR(-ENOMEM
);
998 info
.in_skb
= in_skb
;
1000 info
.nlmsg_seq
= seq
;
1001 info
.nlmsg_flags
= 0;
1003 err
= dump_one_state(x
, 0, &info
);
1006 return ERR_PTR(err
);
1012 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1013 * Must be called with RCU read lock.
1015 static inline int xfrm_nlmsg_multicast(struct net
*net
, struct sk_buff
*skb
,
1016 u32 pid
, unsigned int group
)
1018 struct sock
*nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1021 return nlmsg_multicast(nlsk
, skb
, pid
, group
, GFP_ATOMIC
);
1026 static inline size_t xfrm_spdinfo_msgsize(void)
1028 return NLMSG_ALIGN(4)
1029 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
1030 + nla_total_size(sizeof(struct xfrmu_spdhinfo
))
1031 + nla_total_size(sizeof(struct xfrmu_spdhthresh
))
1032 + nla_total_size(sizeof(struct xfrmu_spdhthresh
));
1035 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
1036 u32 portid
, u32 seq
, u32 flags
)
1038 struct xfrmk_spdinfo si
;
1039 struct xfrmu_spdinfo spc
;
1040 struct xfrmu_spdhinfo sph
;
1041 struct xfrmu_spdhthresh spt4
, spt6
;
1042 struct nlmsghdr
*nlh
;
1047 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
1048 if (nlh
== NULL
) /* shouldn't really happen ... */
1051 f
= nlmsg_data(nlh
);
1053 xfrm_spd_getinfo(net
, &si
);
1054 spc
.incnt
= si
.incnt
;
1055 spc
.outcnt
= si
.outcnt
;
1056 spc
.fwdcnt
= si
.fwdcnt
;
1057 spc
.inscnt
= si
.inscnt
;
1058 spc
.outscnt
= si
.outscnt
;
1059 spc
.fwdscnt
= si
.fwdscnt
;
1060 sph
.spdhcnt
= si
.spdhcnt
;
1061 sph
.spdhmcnt
= si
.spdhmcnt
;
1064 lseq
= read_seqbegin(&net
->xfrm
.policy_hthresh
.lock
);
1066 spt4
.lbits
= net
->xfrm
.policy_hthresh
.lbits4
;
1067 spt4
.rbits
= net
->xfrm
.policy_hthresh
.rbits4
;
1068 spt6
.lbits
= net
->xfrm
.policy_hthresh
.lbits6
;
1069 spt6
.rbits
= net
->xfrm
.policy_hthresh
.rbits6
;
1070 } while (read_seqretry(&net
->xfrm
.policy_hthresh
.lock
, lseq
));
1072 err
= nla_put(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
1074 err
= nla_put(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
1076 err
= nla_put(skb
, XFRMA_SPD_IPV4_HTHRESH
, sizeof(spt4
), &spt4
);
1078 err
= nla_put(skb
, XFRMA_SPD_IPV6_HTHRESH
, sizeof(spt6
), &spt6
);
1080 nlmsg_cancel(skb
, nlh
);
1084 nlmsg_end(skb
, nlh
);
1088 static int xfrm_set_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1089 struct nlattr
**attrs
)
1091 struct net
*net
= sock_net(skb
->sk
);
1092 struct xfrmu_spdhthresh
*thresh4
= NULL
;
1093 struct xfrmu_spdhthresh
*thresh6
= NULL
;
1095 /* selector prefixlen thresholds to hash policies */
1096 if (attrs
[XFRMA_SPD_IPV4_HTHRESH
]) {
1097 struct nlattr
*rta
= attrs
[XFRMA_SPD_IPV4_HTHRESH
];
1099 if (nla_len(rta
) < sizeof(*thresh4
))
1101 thresh4
= nla_data(rta
);
1102 if (thresh4
->lbits
> 32 || thresh4
->rbits
> 32)
1105 if (attrs
[XFRMA_SPD_IPV6_HTHRESH
]) {
1106 struct nlattr
*rta
= attrs
[XFRMA_SPD_IPV6_HTHRESH
];
1108 if (nla_len(rta
) < sizeof(*thresh6
))
1110 thresh6
= nla_data(rta
);
1111 if (thresh6
->lbits
> 128 || thresh6
->rbits
> 128)
1115 if (thresh4
|| thresh6
) {
1116 write_seqlock(&net
->xfrm
.policy_hthresh
.lock
);
1118 net
->xfrm
.policy_hthresh
.lbits4
= thresh4
->lbits
;
1119 net
->xfrm
.policy_hthresh
.rbits4
= thresh4
->rbits
;
1122 net
->xfrm
.policy_hthresh
.lbits6
= thresh6
->lbits
;
1123 net
->xfrm
.policy_hthresh
.rbits6
= thresh6
->rbits
;
1125 write_sequnlock(&net
->xfrm
.policy_hthresh
.lock
);
1127 xfrm_policy_hash_rebuild(net
);
1133 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1134 struct nlattr
**attrs
)
1136 struct net
*net
= sock_net(skb
->sk
);
1137 struct sk_buff
*r_skb
;
1138 u32
*flags
= nlmsg_data(nlh
);
1139 u32 sportid
= NETLINK_CB(skb
).portid
;
1140 u32 seq
= nlh
->nlmsg_seq
;
1142 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
1146 if (build_spdinfo(r_skb
, net
, sportid
, seq
, *flags
) < 0)
1149 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1152 static inline size_t xfrm_sadinfo_msgsize(void)
1154 return NLMSG_ALIGN(4)
1155 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
1156 + nla_total_size(4); /* XFRMA_SAD_CNT */
1159 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
1160 u32 portid
, u32 seq
, u32 flags
)
1162 struct xfrmk_sadinfo si
;
1163 struct xfrmu_sadhinfo sh
;
1164 struct nlmsghdr
*nlh
;
1168 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
1169 if (nlh
== NULL
) /* shouldn't really happen ... */
1172 f
= nlmsg_data(nlh
);
1174 xfrm_sad_getinfo(net
, &si
);
1176 sh
.sadhmcnt
= si
.sadhmcnt
;
1177 sh
.sadhcnt
= si
.sadhcnt
;
1179 err
= nla_put_u32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
1181 err
= nla_put(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
1183 nlmsg_cancel(skb
, nlh
);
1187 nlmsg_end(skb
, nlh
);
1191 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1192 struct nlattr
**attrs
)
1194 struct net
*net
= sock_net(skb
->sk
);
1195 struct sk_buff
*r_skb
;
1196 u32
*flags
= nlmsg_data(nlh
);
1197 u32 sportid
= NETLINK_CB(skb
).portid
;
1198 u32 seq
= nlh
->nlmsg_seq
;
1200 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
1204 if (build_sadinfo(r_skb
, net
, sportid
, seq
, *flags
) < 0)
1207 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1210 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1211 struct nlattr
**attrs
)
1213 struct net
*net
= sock_net(skb
->sk
);
1214 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
1215 struct xfrm_state
*x
;
1216 struct sk_buff
*resp_skb
;
1219 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
1223 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1224 if (IS_ERR(resp_skb
)) {
1225 err
= PTR_ERR(resp_skb
);
1227 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1234 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1235 struct nlattr
**attrs
)
1237 struct net
*net
= sock_net(skb
->sk
);
1238 struct xfrm_state
*x
;
1239 struct xfrm_userspi_info
*p
;
1240 struct sk_buff
*resp_skb
;
1241 xfrm_address_t
*daddr
;
1247 p
= nlmsg_data(nlh
);
1248 err
= verify_spi_info(p
->info
.id
.proto
, p
->min
, p
->max
);
1252 family
= p
->info
.family
;
1253 daddr
= &p
->info
.id
.daddr
;
1257 mark
= xfrm_mark_get(attrs
, &m
);
1259 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
1260 if (x
&& !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
)) {
1267 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
1268 p
->info
.id
.proto
, daddr
,
1275 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
1279 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1280 if (IS_ERR(resp_skb
)) {
1281 err
= PTR_ERR(resp_skb
);
1285 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1293 static int verify_policy_dir(u8 dir
)
1296 case XFRM_POLICY_IN
:
1297 case XFRM_POLICY_OUT
:
1298 case XFRM_POLICY_FWD
:
1308 static int verify_policy_type(u8 type
)
1311 case XFRM_POLICY_TYPE_MAIN
:
1312 #ifdef CONFIG_XFRM_SUB_POLICY
1313 case XFRM_POLICY_TYPE_SUB
:
1324 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1329 case XFRM_SHARE_ANY
:
1330 case XFRM_SHARE_SESSION
:
1331 case XFRM_SHARE_USER
:
1332 case XFRM_SHARE_UNIQUE
:
1339 switch (p
->action
) {
1340 case XFRM_POLICY_ALLOW
:
1341 case XFRM_POLICY_BLOCK
:
1348 switch (p
->sel
.family
) {
1353 #if IS_ENABLED(CONFIG_IPV6)
1356 return -EAFNOSUPPORT
;
1363 ret
= verify_policy_dir(p
->dir
);
1366 if (p
->index
&& ((p
->index
& XFRM_POLICY_MAX
) != p
->dir
))
1372 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1374 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1375 struct xfrm_user_sec_ctx
*uctx
;
1380 uctx
= nla_data(rt
);
1381 return security_xfrm_policy_alloc(&pol
->security
, uctx
, GFP_KERNEL
);
1384 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1390 for (i
= 0; i
< nr
; i
++, ut
++) {
1391 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1393 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1394 memcpy(&t
->saddr
, &ut
->saddr
,
1395 sizeof(xfrm_address_t
));
1396 t
->reqid
= ut
->reqid
;
1398 t
->share
= ut
->share
;
1399 t
->optional
= ut
->optional
;
1400 t
->aalgos
= ut
->aalgos
;
1401 t
->ealgos
= ut
->ealgos
;
1402 t
->calgos
= ut
->calgos
;
1403 /* If all masks are ~0, then we allow all algorithms. */
1404 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1405 t
->encap_family
= ut
->family
;
1409 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1413 if (nr
> XFRM_MAX_DEPTH
)
1416 for (i
= 0; i
< nr
; i
++) {
1417 /* We never validated the ut->family value, so many
1418 * applications simply leave it at zero. The check was
1419 * never made and ut->family was ignored because all
1420 * templates could be assumed to have the same family as
1421 * the policy itself. Now that we will have ipv4-in-ipv6
1422 * and ipv6-in-ipv4 tunnels, this is no longer true.
1425 ut
[i
].family
= family
;
1427 switch (ut
[i
].family
) {
1430 #if IS_ENABLED(CONFIG_IPV6)
1442 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1444 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1449 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1450 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1453 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1457 copy_templates(pol
, utmpl
, nr
);
1462 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1464 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1465 struct xfrm_userpolicy_type
*upt
;
1466 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1474 err
= verify_policy_type(type
);
1482 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1484 xp
->priority
= p
->priority
;
1485 xp
->index
= p
->index
;
1486 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1487 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1488 xp
->action
= p
->action
;
1489 xp
->flags
= p
->flags
;
1490 xp
->family
= p
->sel
.family
;
1491 /* XXX xp->share = p->share; */
1494 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1496 memset(p
, 0, sizeof(*p
));
1497 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1498 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1499 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1500 p
->priority
= xp
->priority
;
1501 p
->index
= xp
->index
;
1502 p
->sel
.family
= xp
->family
;
1504 p
->action
= xp
->action
;
1505 p
->flags
= xp
->flags
;
1506 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1509 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1511 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1519 copy_from_user_policy(xp
, p
);
1521 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1525 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1526 err
= copy_from_user_sec_ctx(xp
, attrs
);
1530 xfrm_mark_get(attrs
, &xp
->mark
);
1536 xfrm_policy_destroy(xp
);
1540 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1541 struct nlattr
**attrs
)
1543 struct net
*net
= sock_net(skb
->sk
);
1544 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1545 struct xfrm_policy
*xp
;
1550 err
= verify_newpolicy_info(p
);
1553 err
= verify_sec_ctx_len(attrs
);
1557 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1561 /* shouldn't excl be based on nlh flags??
1562 * Aha! this is anti-netlink really i.e more pfkey derived
1563 * in netlink excl is a flag and you wouldnt need
1564 * a type XFRM_MSG_UPDPOLICY - JHS */
1565 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1566 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1567 xfrm_audit_policy_add(xp
, err
? 0 : 1, true);
1570 security_xfrm_policy_free(xp
->security
);
1575 c
.event
= nlh
->nlmsg_type
;
1576 c
.seq
= nlh
->nlmsg_seq
;
1577 c
.portid
= nlh
->nlmsg_pid
;
1578 km_policy_notify(xp
, p
->dir
, &c
);
1585 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1587 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1590 if (xp
->xfrm_nr
== 0)
1593 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1594 struct xfrm_user_tmpl
*up
= &vec
[i
];
1595 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1597 memset(up
, 0, sizeof(*up
));
1598 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1599 up
->family
= kp
->encap_family
;
1600 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1601 up
->reqid
= kp
->reqid
;
1602 up
->mode
= kp
->mode
;
1603 up
->share
= kp
->share
;
1604 up
->optional
= kp
->optional
;
1605 up
->aalgos
= kp
->aalgos
;
1606 up
->ealgos
= kp
->ealgos
;
1607 up
->calgos
= kp
->calgos
;
1610 return nla_put(skb
, XFRMA_TMPL
,
1611 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1614 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1617 return copy_sec_ctx(x
->security
, skb
);
1622 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1625 return copy_sec_ctx(xp
->security
, skb
);
1628 static inline size_t userpolicy_type_attrsize(void)
1630 #ifdef CONFIG_XFRM_SUB_POLICY
1631 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1637 #ifdef CONFIG_XFRM_SUB_POLICY
1638 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1640 struct xfrm_userpolicy_type upt
= {
1644 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1648 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1654 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1656 struct xfrm_dump_info
*sp
= ptr
;
1657 struct xfrm_userpolicy_info
*p
;
1658 struct sk_buff
*in_skb
= sp
->in_skb
;
1659 struct sk_buff
*skb
= sp
->out_skb
;
1660 struct nlmsghdr
*nlh
;
1663 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
1664 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1668 p
= nlmsg_data(nlh
);
1669 copy_to_user_policy(xp
, p
, dir
);
1670 err
= copy_to_user_tmpl(xp
, skb
);
1672 err
= copy_to_user_sec_ctx(xp
, skb
);
1674 err
= copy_to_user_policy_type(xp
->type
, skb
);
1676 err
= xfrm_mark_put(skb
, &xp
->mark
);
1678 nlmsg_cancel(skb
, nlh
);
1681 nlmsg_end(skb
, nlh
);
1685 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1687 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*)cb
->args
;
1688 struct net
*net
= sock_net(cb
->skb
->sk
);
1690 xfrm_policy_walk_done(walk
, net
);
1694 static int xfrm_dump_policy_start(struct netlink_callback
*cb
)
1696 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*)cb
->args
;
1698 BUILD_BUG_ON(sizeof(*walk
) > sizeof(cb
->args
));
1700 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1704 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1706 struct net
*net
= sock_net(skb
->sk
);
1707 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*)cb
->args
;
1708 struct xfrm_dump_info info
;
1710 info
.in_skb
= cb
->skb
;
1712 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1713 info
.nlmsg_flags
= NLM_F_MULTI
;
1715 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1720 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1721 struct xfrm_policy
*xp
,
1724 struct xfrm_dump_info info
;
1725 struct sk_buff
*skb
;
1728 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1730 return ERR_PTR(-ENOMEM
);
1732 info
.in_skb
= in_skb
;
1734 info
.nlmsg_seq
= seq
;
1735 info
.nlmsg_flags
= 0;
1737 err
= dump_one_policy(xp
, dir
, 0, &info
);
1740 return ERR_PTR(err
);
1746 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1747 struct nlattr
**attrs
)
1749 struct net
*net
= sock_net(skb
->sk
);
1750 struct xfrm_policy
*xp
;
1751 struct xfrm_userpolicy_id
*p
;
1752 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1757 u32 mark
= xfrm_mark_get(attrs
, &m
);
1759 p
= nlmsg_data(nlh
);
1760 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1762 err
= copy_from_user_policy_type(&type
, attrs
);
1766 err
= verify_policy_dir(p
->dir
);
1771 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, delete, &err
);
1773 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1774 struct xfrm_sec_ctx
*ctx
;
1776 err
= verify_sec_ctx_len(attrs
);
1782 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1784 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
1788 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
, &p
->sel
,
1790 security_xfrm_policy_free(ctx
);
1796 struct sk_buff
*resp_skb
;
1798 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1799 if (IS_ERR(resp_skb
)) {
1800 err
= PTR_ERR(resp_skb
);
1802 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
1803 NETLINK_CB(skb
).portid
);
1806 xfrm_audit_policy_delete(xp
, err
? 0 : 1, true);
1811 c
.data
.byid
= p
->index
;
1812 c
.event
= nlh
->nlmsg_type
;
1813 c
.seq
= nlh
->nlmsg_seq
;
1814 c
.portid
= nlh
->nlmsg_pid
;
1815 km_policy_notify(xp
, p
->dir
, &c
);
1820 if (delete && err
== 0)
1821 xfrm_garbage_collect(net
);
1825 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1826 struct nlattr
**attrs
)
1828 struct net
*net
= sock_net(skb
->sk
);
1830 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1833 err
= xfrm_state_flush(net
, p
->proto
, true);
1835 if (err
== -ESRCH
) /* empty table */
1839 c
.data
.proto
= p
->proto
;
1840 c
.event
= nlh
->nlmsg_type
;
1841 c
.seq
= nlh
->nlmsg_seq
;
1842 c
.portid
= nlh
->nlmsg_pid
;
1844 km_state_notify(NULL
, &c
);
1849 static inline size_t xfrm_aevent_msgsize(struct xfrm_state
*x
)
1851 size_t replay_size
= x
->replay_esn
?
1852 xfrm_replay_state_esn_len(x
->replay_esn
) :
1853 sizeof(struct xfrm_replay_state
);
1855 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
1856 + nla_total_size(replay_size
)
1857 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur
))
1858 + nla_total_size(sizeof(struct xfrm_mark
))
1859 + nla_total_size(4) /* XFRM_AE_RTHR */
1860 + nla_total_size(4); /* XFRM_AE_ETHR */
1863 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
1865 struct xfrm_aevent_id
*id
;
1866 struct nlmsghdr
*nlh
;
1869 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1873 id
= nlmsg_data(nlh
);
1874 memset(&id
->sa_id
, 0, sizeof(id
->sa_id
));
1875 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
, sizeof(x
->id
.daddr
));
1876 id
->sa_id
.spi
= x
->id
.spi
;
1877 id
->sa_id
.family
= x
->props
.family
;
1878 id
->sa_id
.proto
= x
->id
.proto
;
1879 memcpy(&id
->saddr
, &x
->props
.saddr
, sizeof(x
->props
.saddr
));
1880 id
->reqid
= x
->props
.reqid
;
1881 id
->flags
= c
->data
.aevent
;
1883 if (x
->replay_esn
) {
1884 err
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
1885 xfrm_replay_state_esn_len(x
->replay_esn
),
1888 err
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
1893 err
= nla_put_64bit(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
,
1898 if (id
->flags
& XFRM_AE_RTHR
) {
1899 err
= nla_put_u32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
1903 if (id
->flags
& XFRM_AE_ETHR
) {
1904 err
= nla_put_u32(skb
, XFRMA_ETIMER_THRESH
,
1905 x
->replay_maxage
* 10 / HZ
);
1909 err
= xfrm_mark_put(skb
, &x
->mark
);
1913 nlmsg_end(skb
, nlh
);
1917 nlmsg_cancel(skb
, nlh
);
1921 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1922 struct nlattr
**attrs
)
1924 struct net
*net
= sock_net(skb
->sk
);
1925 struct xfrm_state
*x
;
1926 struct sk_buff
*r_skb
;
1931 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1932 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1934 mark
= xfrm_mark_get(attrs
, &m
);
1936 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1940 r_skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
1941 if (r_skb
== NULL
) {
1947 * XXX: is this lock really needed - none of the other
1948 * gets lock (the concern is things getting updated
1949 * while we are still reading) - jhs
1951 spin_lock_bh(&x
->lock
);
1952 c
.data
.aevent
= p
->flags
;
1953 c
.seq
= nlh
->nlmsg_seq
;
1954 c
.portid
= nlh
->nlmsg_pid
;
1956 if (build_aevent(r_skb
, x
, &c
) < 0)
1958 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).portid
);
1959 spin_unlock_bh(&x
->lock
);
1964 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1965 struct nlattr
**attrs
)
1967 struct net
*net
= sock_net(skb
->sk
);
1968 struct xfrm_state
*x
;
1973 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1974 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
1975 struct nlattr
*re
= attrs
[XFRMA_REPLAY_ESN_VAL
];
1976 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
1977 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
1978 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
1980 if (!lt
&& !rp
&& !re
&& !et
&& !rt
)
1983 /* pedantic mode - thou shalt sayeth replaceth */
1984 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1987 mark
= xfrm_mark_get(attrs
, &m
);
1989 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1993 if (x
->km
.state
!= XFRM_STATE_VALID
)
1996 err
= xfrm_replay_verify_len(x
->replay_esn
, re
);
2000 spin_lock_bh(&x
->lock
);
2001 xfrm_update_ae_params(x
, attrs
, 1);
2002 spin_unlock_bh(&x
->lock
);
2004 c
.event
= nlh
->nlmsg_type
;
2005 c
.seq
= nlh
->nlmsg_seq
;
2006 c
.portid
= nlh
->nlmsg_pid
;
2007 c
.data
.aevent
= XFRM_AE_CU
;
2008 km_state_notify(x
, &c
);
2015 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2016 struct nlattr
**attrs
)
2018 struct net
*net
= sock_net(skb
->sk
);
2020 u8 type
= XFRM_POLICY_TYPE_MAIN
;
2023 err
= copy_from_user_policy_type(&type
, attrs
);
2027 err
= xfrm_policy_flush(net
, type
, true);
2029 if (err
== -ESRCH
) /* empty table */
2033 xfrm_garbage_collect(net
);
2036 c
.event
= nlh
->nlmsg_type
;
2037 c
.seq
= nlh
->nlmsg_seq
;
2038 c
.portid
= nlh
->nlmsg_pid
;
2040 km_policy_notify(NULL
, 0, &c
);
2044 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2045 struct nlattr
**attrs
)
2047 struct net
*net
= sock_net(skb
->sk
);
2048 struct xfrm_policy
*xp
;
2049 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
2050 struct xfrm_userpolicy_info
*p
= &up
->pol
;
2051 u8 type
= XFRM_POLICY_TYPE_MAIN
;
2054 u32 mark
= xfrm_mark_get(attrs
, &m
);
2056 err
= copy_from_user_policy_type(&type
, attrs
);
2060 err
= verify_policy_dir(p
->dir
);
2065 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, 0, &err
);
2067 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
2068 struct xfrm_sec_ctx
*ctx
;
2070 err
= verify_sec_ctx_len(attrs
);
2076 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
2078 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
2082 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
,
2083 &p
->sel
, ctx
, 0, &err
);
2084 security_xfrm_policy_free(ctx
);
2089 if (unlikely(xp
->walk
.dead
))
2094 xfrm_policy_delete(xp
, p
->dir
);
2095 xfrm_audit_policy_delete(xp
, 1, true);
2097 km_policy_expired(xp
, p
->dir
, up
->hard
, nlh
->nlmsg_pid
);
2104 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2105 struct nlattr
**attrs
)
2107 struct net
*net
= sock_net(skb
->sk
);
2108 struct xfrm_state
*x
;
2110 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
2111 struct xfrm_usersa_info
*p
= &ue
->state
;
2113 u32 mark
= xfrm_mark_get(attrs
, &m
);
2115 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
2121 spin_lock_bh(&x
->lock
);
2123 if (x
->km
.state
!= XFRM_STATE_VALID
)
2125 km_state_expired(x
, ue
->hard
, nlh
->nlmsg_pid
);
2128 __xfrm_state_delete(x
);
2129 xfrm_audit_state_delete(x
, 1, true);
2133 spin_unlock_bh(&x
->lock
);
2138 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2139 struct nlattr
**attrs
)
2141 struct net
*net
= sock_net(skb
->sk
);
2142 struct xfrm_policy
*xp
;
2143 struct xfrm_user_tmpl
*ut
;
2145 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
2146 struct xfrm_mark mark
;
2148 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
2149 struct xfrm_state
*x
= xfrm_state_alloc(net
);
2155 xfrm_mark_get(attrs
, &mark
);
2157 err
= verify_newpolicy_info(&ua
->policy
);
2162 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
2166 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
2167 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
2168 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
2169 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
2170 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
2172 /* extract the templates and for each call km_key */
2173 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
2174 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
2175 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
2176 x
->props
.mode
= t
->mode
;
2177 x
->props
.reqid
= t
->reqid
;
2178 x
->props
.family
= ut
->family
;
2179 t
->aalgos
= ua
->aalgos
;
2180 t
->ealgos
= ua
->ealgos
;
2181 t
->calgos
= ua
->calgos
;
2182 err
= km_query(x
, t
, xp
);
2197 #ifdef CONFIG_XFRM_MIGRATE
2198 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
2199 struct xfrm_kmaddress
*k
,
2200 struct nlattr
**attrs
, int *num
)
2202 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
2203 struct xfrm_user_migrate
*um
;
2207 struct xfrm_user_kmaddress
*uk
;
2209 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
2210 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
2211 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
2212 k
->family
= uk
->family
;
2213 k
->reserved
= uk
->reserved
;
2217 num_migrate
= nla_len(rt
) / sizeof(*um
);
2219 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
2222 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
2223 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
2224 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
2225 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
2226 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
2228 ma
->proto
= um
->proto
;
2229 ma
->mode
= um
->mode
;
2230 ma
->reqid
= um
->reqid
;
2232 ma
->old_family
= um
->old_family
;
2233 ma
->new_family
= um
->new_family
;
2240 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2241 struct nlattr
**attrs
)
2243 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
2244 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
2245 struct xfrm_kmaddress km
, *kmp
;
2249 struct net
*net
= sock_net(skb
->sk
);
2250 struct xfrm_encap_tmpl
*encap
= NULL
;
2252 if (attrs
[XFRMA_MIGRATE
] == NULL
)
2255 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
2257 err
= copy_from_user_policy_type(&type
, attrs
);
2261 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
2268 if (attrs
[XFRMA_ENCAP
]) {
2269 encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
2270 sizeof(*encap
), GFP_KERNEL
);
2275 err
= xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
, net
, encap
);
2282 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2283 struct nlattr
**attrs
)
2285 return -ENOPROTOOPT
;
2289 #ifdef CONFIG_XFRM_MIGRATE
2290 static int copy_to_user_migrate(const struct xfrm_migrate
*m
, struct sk_buff
*skb
)
2292 struct xfrm_user_migrate um
;
2294 memset(&um
, 0, sizeof(um
));
2295 um
.proto
= m
->proto
;
2297 um
.reqid
= m
->reqid
;
2298 um
.old_family
= m
->old_family
;
2299 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
2300 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
2301 um
.new_family
= m
->new_family
;
2302 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
2303 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
2305 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
2308 static int copy_to_user_kmaddress(const struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
2310 struct xfrm_user_kmaddress uk
;
2312 memset(&uk
, 0, sizeof(uk
));
2313 uk
.family
= k
->family
;
2314 uk
.reserved
= k
->reserved
;
2315 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
2316 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
2318 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2321 static inline size_t xfrm_migrate_msgsize(int num_migrate
, int with_kma
,
2324 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2325 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2326 + (with_encp
? nla_total_size(sizeof(struct xfrm_encap_tmpl
)) : 0)
2327 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2328 + userpolicy_type_attrsize();
2331 static int build_migrate(struct sk_buff
*skb
, const struct xfrm_migrate
*m
,
2332 int num_migrate
, const struct xfrm_kmaddress
*k
,
2333 const struct xfrm_selector
*sel
,
2334 const struct xfrm_encap_tmpl
*encap
, u8 dir
, u8 type
)
2336 const struct xfrm_migrate
*mp
;
2337 struct xfrm_userpolicy_id
*pol_id
;
2338 struct nlmsghdr
*nlh
;
2341 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2345 pol_id
= nlmsg_data(nlh
);
2346 /* copy data from selector, dir, and type to the pol_id */
2347 memset(pol_id
, 0, sizeof(*pol_id
));
2348 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2352 err
= copy_to_user_kmaddress(k
, skb
);
2357 err
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*encap
), encap
);
2361 err
= copy_to_user_policy_type(type
, skb
);
2364 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2365 err
= copy_to_user_migrate(mp
, skb
);
2370 nlmsg_end(skb
, nlh
);
2374 nlmsg_cancel(skb
, nlh
);
2378 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2379 const struct xfrm_migrate
*m
, int num_migrate
,
2380 const struct xfrm_kmaddress
*k
,
2381 const struct xfrm_encap_tmpl
*encap
)
2383 struct net
*net
= &init_net
;
2384 struct sk_buff
*skb
;
2386 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
, !!encap
),
2392 if (build_migrate(skb
, m
, num_migrate
, k
, sel
, encap
, dir
, type
) < 0)
2395 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_MIGRATE
);
2398 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2399 const struct xfrm_migrate
*m
, int num_migrate
,
2400 const struct xfrm_kmaddress
*k
,
2401 const struct xfrm_encap_tmpl
*encap
)
2403 return -ENOPROTOOPT
;
2407 #define XMSGSIZE(type) sizeof(struct type)
2409 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2410 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2411 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2412 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2413 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2414 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2415 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2416 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2417 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2418 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2419 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2420 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2421 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2422 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2423 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2424 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2425 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2426 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2427 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2428 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2429 [XFRM_MSG_NEWSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2430 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2435 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2436 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2437 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2438 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2439 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2440 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2441 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2442 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2443 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2444 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2445 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2446 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2447 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2448 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2449 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2450 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2451 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2452 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2453 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2454 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2455 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2456 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2457 [XFRMA_TFCPAD
] = { .type
= NLA_U32
},
2458 [XFRMA_REPLAY_ESN_VAL
] = { .len
= sizeof(struct xfrm_replay_state_esn
) },
2459 [XFRMA_SA_EXTRA_FLAGS
] = { .type
= NLA_U32
},
2460 [XFRMA_PROTO
] = { .type
= NLA_U8
},
2461 [XFRMA_ADDRESS_FILTER
] = { .len
= sizeof(struct xfrm_address_filter
) },
2462 [XFRMA_OFFLOAD_DEV
] = { .len
= sizeof(struct xfrm_user_offload
) },
2465 static const struct nla_policy xfrma_spd_policy
[XFRMA_SPD_MAX
+1] = {
2466 [XFRMA_SPD_IPV4_HTHRESH
] = { .len
= sizeof(struct xfrmu_spdhthresh
) },
2467 [XFRMA_SPD_IPV6_HTHRESH
] = { .len
= sizeof(struct xfrmu_spdhthresh
) },
2470 static const struct xfrm_link
{
2471 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2472 int (*start
)(struct netlink_callback
*);
2473 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2474 int (*done
)(struct netlink_callback
*);
2475 const struct nla_policy
*nla_pol
;
2477 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2478 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2479 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2480 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2481 .dump
= xfrm_dump_sa
,
2482 .done
= xfrm_dump_sa_done
},
2483 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2484 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2485 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2486 .start
= xfrm_dump_policy_start
,
2487 .dump
= xfrm_dump_policy
,
2488 .done
= xfrm_dump_policy_done
},
2489 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2490 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2491 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2492 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2493 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2494 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2495 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2496 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2497 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2498 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2499 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2500 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2501 [XFRM_MSG_NEWSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_set_spdinfo
,
2502 .nla_pol
= xfrma_spd_policy
,
2503 .nla_max
= XFRMA_SPD_MAX
},
2504 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2507 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2508 struct netlink_ext_ack
*extack
)
2510 struct net
*net
= sock_net(skb
->sk
);
2511 struct nlattr
*attrs
[XFRMA_MAX
+1];
2512 const struct xfrm_link
*link
;
2515 #ifdef CONFIG_COMPAT
2516 if (in_compat_syscall())
2520 type
= nlh
->nlmsg_type
;
2521 if (type
> XFRM_MSG_MAX
)
2524 type
-= XFRM_MSG_BASE
;
2525 link
= &xfrm_dispatch
[type
];
2527 /* All operations require privileges, even GET */
2528 if (!netlink_net_capable(skb
, CAP_NET_ADMIN
))
2531 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2532 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2533 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2534 if (link
->dump
== NULL
)
2538 struct netlink_dump_control c
= {
2539 .start
= link
->start
,
2543 return netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, &c
);
2547 err
= nlmsg_parse(nlh
, xfrm_msg_min
[type
], attrs
,
2548 link
->nla_max
? : XFRMA_MAX
,
2549 link
->nla_pol
? : xfrma_policy
, extack
);
2553 if (link
->doit
== NULL
)
2556 return link
->doit(skb
, nlh
, attrs
);
2559 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2561 struct net
*net
= sock_net(skb
->sk
);
2563 mutex_lock(&net
->xfrm
.xfrm_cfg_mutex
);
2564 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2565 mutex_unlock(&net
->xfrm
.xfrm_cfg_mutex
);
2568 static inline size_t xfrm_expire_msgsize(void)
2570 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2571 + nla_total_size(sizeof(struct xfrm_mark
));
2574 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
2576 struct xfrm_user_expire
*ue
;
2577 struct nlmsghdr
*nlh
;
2580 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2584 ue
= nlmsg_data(nlh
);
2585 copy_to_user_state(x
, &ue
->state
);
2586 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2587 /* clear the padding bytes */
2588 memset(&ue
->hard
+ 1, 0, sizeof(*ue
) - offsetofend(typeof(*ue
), hard
));
2590 err
= xfrm_mark_put(skb
, &x
->mark
);
2594 nlmsg_end(skb
, nlh
);
2598 static int xfrm_exp_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2600 struct net
*net
= xs_net(x
);
2601 struct sk_buff
*skb
;
2603 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2607 if (build_expire(skb
, x
, c
) < 0) {
2612 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_EXPIRE
);
2615 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2617 struct net
*net
= xs_net(x
);
2618 struct sk_buff
*skb
;
2620 skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
2624 if (build_aevent(skb
, x
, c
) < 0)
2627 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_AEVENTS
);
2630 static int xfrm_notify_sa_flush(const struct km_event
*c
)
2632 struct net
*net
= c
->net
;
2633 struct xfrm_usersa_flush
*p
;
2634 struct nlmsghdr
*nlh
;
2635 struct sk_buff
*skb
;
2636 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2638 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2642 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2648 p
= nlmsg_data(nlh
);
2649 p
->proto
= c
->data
.proto
;
2651 nlmsg_end(skb
, nlh
);
2653 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_SA
);
2656 static inline size_t xfrm_sa_len(struct xfrm_state
*x
)
2660 l
+= nla_total_size(aead_len(x
->aead
));
2662 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2663 (x
->aalg
->alg_key_len
+ 7) / 8);
2664 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2667 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
2669 l
+= nla_total_size(sizeof(*x
->calg
));
2671 l
+= nla_total_size(sizeof(*x
->encap
));
2673 l
+= nla_total_size(sizeof(x
->tfcpad
));
2675 l
+= nla_total_size(xfrm_replay_state_esn_len(x
->replay_esn
));
2677 l
+= nla_total_size(sizeof(struct xfrm_replay_state
));
2679 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
2680 x
->security
->ctx_len
);
2682 l
+= nla_total_size(sizeof(*x
->coaddr
));
2683 if (x
->props
.extra_flags
)
2684 l
+= nla_total_size(sizeof(x
->props
.extra_flags
));
2686 l
+= nla_total_size(sizeof(x
->xso
));
2688 /* Must count x->lastused as it may become non-zero behind our back. */
2689 l
+= nla_total_size_64bit(sizeof(u64
));
2694 static int xfrm_notify_sa(struct xfrm_state
*x
, const struct km_event
*c
)
2696 struct net
*net
= xs_net(x
);
2697 struct xfrm_usersa_info
*p
;
2698 struct xfrm_usersa_id
*id
;
2699 struct nlmsghdr
*nlh
;
2700 struct sk_buff
*skb
;
2701 int len
= xfrm_sa_len(x
);
2704 headlen
= sizeof(*p
);
2705 if (c
->event
== XFRM_MSG_DELSA
) {
2706 len
+= nla_total_size(headlen
);
2707 headlen
= sizeof(*id
);
2708 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2710 len
+= NLMSG_ALIGN(headlen
);
2712 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2716 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
2721 p
= nlmsg_data(nlh
);
2722 if (c
->event
== XFRM_MSG_DELSA
) {
2723 struct nlattr
*attr
;
2725 id
= nlmsg_data(nlh
);
2726 memset(id
, 0, sizeof(*id
));
2727 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2728 id
->spi
= x
->id
.spi
;
2729 id
->family
= x
->props
.family
;
2730 id
->proto
= x
->id
.proto
;
2732 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
2739 err
= copy_to_user_state_extra(x
, p
, skb
);
2743 nlmsg_end(skb
, nlh
);
2745 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_SA
);
2752 static int xfrm_send_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2756 case XFRM_MSG_EXPIRE
:
2757 return xfrm_exp_state_notify(x
, c
);
2758 case XFRM_MSG_NEWAE
:
2759 return xfrm_aevent_state_notify(x
, c
);
2760 case XFRM_MSG_DELSA
:
2761 case XFRM_MSG_UPDSA
:
2762 case XFRM_MSG_NEWSA
:
2763 return xfrm_notify_sa(x
, c
);
2764 case XFRM_MSG_FLUSHSA
:
2765 return xfrm_notify_sa_flush(c
);
2767 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
2776 static inline size_t xfrm_acquire_msgsize(struct xfrm_state
*x
,
2777 struct xfrm_policy
*xp
)
2779 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
2780 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2781 + nla_total_size(sizeof(struct xfrm_mark
))
2782 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
2783 + userpolicy_type_attrsize();
2786 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2787 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
)
2789 __u32 seq
= xfrm_get_acqseq();
2790 struct xfrm_user_acquire
*ua
;
2791 struct nlmsghdr
*nlh
;
2794 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2798 ua
= nlmsg_data(nlh
);
2799 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2800 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2801 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2802 copy_to_user_policy(xp
, &ua
->policy
, XFRM_POLICY_OUT
);
2803 ua
->aalgos
= xt
->aalgos
;
2804 ua
->ealgos
= xt
->ealgos
;
2805 ua
->calgos
= xt
->calgos
;
2806 ua
->seq
= x
->km
.seq
= seq
;
2808 err
= copy_to_user_tmpl(xp
, skb
);
2810 err
= copy_to_user_state_sec_ctx(x
, skb
);
2812 err
= copy_to_user_policy_type(xp
->type
, skb
);
2814 err
= xfrm_mark_put(skb
, &xp
->mark
);
2816 nlmsg_cancel(skb
, nlh
);
2820 nlmsg_end(skb
, nlh
);
2824 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2825 struct xfrm_policy
*xp
)
2827 struct net
*net
= xs_net(x
);
2828 struct sk_buff
*skb
;
2830 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
2834 if (build_acquire(skb
, x
, xt
, xp
) < 0)
2837 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_ACQUIRE
);
2840 /* User gives us xfrm_user_policy_info followed by an array of 0
2841 * or more templates.
2843 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2844 u8
*data
, int len
, int *dir
)
2846 struct net
*net
= sock_net(sk
);
2847 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2848 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2849 struct xfrm_policy
*xp
;
2852 switch (sk
->sk_family
) {
2854 if (opt
!= IP_XFRM_POLICY
) {
2859 #if IS_ENABLED(CONFIG_IPV6)
2861 if (opt
!= IPV6_XFRM_POLICY
) {
2874 if (len
< sizeof(*p
) ||
2875 verify_newpolicy_info(p
))
2878 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2879 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2882 if (p
->dir
> XFRM_POLICY_OUT
)
2885 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
2891 copy_from_user_policy(xp
, p
);
2892 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2893 copy_templates(xp
, ut
, nr
);
2900 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
2902 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
2903 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2904 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
2905 + nla_total_size(sizeof(struct xfrm_mark
))
2906 + userpolicy_type_attrsize();
2909 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2910 int dir
, const struct km_event
*c
)
2912 struct xfrm_user_polexpire
*upe
;
2913 int hard
= c
->data
.hard
;
2914 struct nlmsghdr
*nlh
;
2917 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2921 upe
= nlmsg_data(nlh
);
2922 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2923 err
= copy_to_user_tmpl(xp
, skb
);
2925 err
= copy_to_user_sec_ctx(xp
, skb
);
2927 err
= copy_to_user_policy_type(xp
->type
, skb
);
2929 err
= xfrm_mark_put(skb
, &xp
->mark
);
2931 nlmsg_cancel(skb
, nlh
);
2936 nlmsg_end(skb
, nlh
);
2940 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2942 struct net
*net
= xp_net(xp
);
2943 struct sk_buff
*skb
;
2945 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
2949 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2952 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_EXPIRE
);
2955 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2957 int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2958 struct net
*net
= xp_net(xp
);
2959 struct xfrm_userpolicy_info
*p
;
2960 struct xfrm_userpolicy_id
*id
;
2961 struct nlmsghdr
*nlh
;
2962 struct sk_buff
*skb
;
2965 headlen
= sizeof(*p
);
2966 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2967 len
+= nla_total_size(headlen
);
2968 headlen
= sizeof(*id
);
2970 len
+= userpolicy_type_attrsize();
2971 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2972 len
+= NLMSG_ALIGN(headlen
);
2974 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2978 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
2983 p
= nlmsg_data(nlh
);
2984 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2985 struct nlattr
*attr
;
2987 id
= nlmsg_data(nlh
);
2988 memset(id
, 0, sizeof(*id
));
2991 id
->index
= xp
->index
;
2993 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2995 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
3003 copy_to_user_policy(xp
, p
, dir
);
3004 err
= copy_to_user_tmpl(xp
, skb
);
3006 err
= copy_to_user_policy_type(xp
->type
, skb
);
3008 err
= xfrm_mark_put(skb
, &xp
->mark
);
3012 nlmsg_end(skb
, nlh
);
3014 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_POLICY
);
3021 static int xfrm_notify_policy_flush(const struct km_event
*c
)
3023 struct net
*net
= c
->net
;
3024 struct nlmsghdr
*nlh
;
3025 struct sk_buff
*skb
;
3028 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
3032 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
3036 err
= copy_to_user_policy_type(c
->data
.type
, skb
);
3040 nlmsg_end(skb
, nlh
);
3042 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_POLICY
);
3049 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
3053 case XFRM_MSG_NEWPOLICY
:
3054 case XFRM_MSG_UPDPOLICY
:
3055 case XFRM_MSG_DELPOLICY
:
3056 return xfrm_notify_policy(xp
, dir
, c
);
3057 case XFRM_MSG_FLUSHPOLICY
:
3058 return xfrm_notify_policy_flush(c
);
3059 case XFRM_MSG_POLEXPIRE
:
3060 return xfrm_exp_policy_notify(xp
, dir
, c
);
3062 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
3070 static inline size_t xfrm_report_msgsize(void)
3072 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
3075 static int build_report(struct sk_buff
*skb
, u8 proto
,
3076 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
3078 struct xfrm_user_report
*ur
;
3079 struct nlmsghdr
*nlh
;
3081 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
3085 ur
= nlmsg_data(nlh
);
3087 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
3090 int err
= nla_put(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
3092 nlmsg_cancel(skb
, nlh
);
3096 nlmsg_end(skb
, nlh
);
3100 static int xfrm_send_report(struct net
*net
, u8 proto
,
3101 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
3103 struct sk_buff
*skb
;
3105 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
3109 if (build_report(skb
, proto
, sel
, addr
) < 0)
3112 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_REPORT
);
3115 static inline size_t xfrm_mapping_msgsize(void)
3117 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
3120 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
3121 xfrm_address_t
*new_saddr
, __be16 new_sport
)
3123 struct xfrm_user_mapping
*um
;
3124 struct nlmsghdr
*nlh
;
3126 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
3130 um
= nlmsg_data(nlh
);
3132 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
3133 um
->id
.spi
= x
->id
.spi
;
3134 um
->id
.family
= x
->props
.family
;
3135 um
->id
.proto
= x
->id
.proto
;
3136 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
3137 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
3138 um
->new_sport
= new_sport
;
3139 um
->old_sport
= x
->encap
->encap_sport
;
3140 um
->reqid
= x
->props
.reqid
;
3142 nlmsg_end(skb
, nlh
);
3146 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
3149 struct net
*net
= xs_net(x
);
3150 struct sk_buff
*skb
;
3152 if (x
->id
.proto
!= IPPROTO_ESP
)
3158 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
3162 if (build_mapping(skb
, x
, ipaddr
, sport
) < 0)
3165 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_MAPPING
);
3168 static bool xfrm_is_alive(const struct km_event
*c
)
3170 return (bool)xfrm_acquire_is_on(c
->net
);
3173 static struct xfrm_mgr netlink_mgr
= {
3174 .notify
= xfrm_send_state_notify
,
3175 .acquire
= xfrm_send_acquire
,
3176 .compile_policy
= xfrm_compile_policy
,
3177 .notify_policy
= xfrm_send_policy_notify
,
3178 .report
= xfrm_send_report
,
3179 .migrate
= xfrm_send_migrate
,
3180 .new_mapping
= xfrm_send_mapping
,
3181 .is_alive
= xfrm_is_alive
,
3184 static int __net_init
xfrm_user_net_init(struct net
*net
)
3187 struct netlink_kernel_cfg cfg
= {
3188 .groups
= XFRMNLGRP_MAX
,
3189 .input
= xfrm_netlink_rcv
,
3192 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, &cfg
);
3195 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
3196 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
3200 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
3203 list_for_each_entry(net
, net_exit_list
, exit_list
)
3204 RCU_INIT_POINTER(net
->xfrm
.nlsk
, NULL
);
3206 list_for_each_entry(net
, net_exit_list
, exit_list
)
3207 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
3210 static struct pernet_operations xfrm_user_net_ops
= {
3211 .init
= xfrm_user_net_init
,
3212 .exit_batch
= xfrm_user_net_exit
,
3215 static int __init
xfrm_user_init(void)
3219 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
3221 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
3224 rv
= xfrm_register_km(&netlink_mgr
);
3226 unregister_pernet_subsys(&xfrm_user_net_ops
);
3230 static void __exit
xfrm_user_exit(void)
3232 xfrm_unregister_km(&netlink_mgr
);
3233 unregister_pernet_subsys(&xfrm_user_net_ops
);
3236 module_init(xfrm_user_init
);
3237 module_exit(xfrm_user_exit
);
3238 MODULE_LICENSE("GPL");
3239 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);