1 // SPDX-License-Identifier: GPL-2.0-only
2 /* xfrm_user.c: User interface to configure xfrm engine.
4 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
8 * Kazunori MIYAZAWA @USAGI
9 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
14 #include <linux/crypto.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/socket.h>
20 #include <linux/string.h>
21 #include <linux/net.h>
22 #include <linux/skbuff.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>
31 #include <linux/uaccess.h>
32 #if IS_ENABLED(CONFIG_IPV6)
33 #include <linux/in6.h>
35 #include <asm/unaligned.h>
37 static int verify_one_alg(struct nlattr
**attrs
, enum xfrm_attr_type_t type
)
39 struct nlattr
*rt
= attrs
[type
];
40 struct xfrm_algo
*algp
;
46 if (nla_len(rt
) < (int)xfrm_alg_len(algp
))
59 algp
->alg_name
[sizeof(algp
->alg_name
) - 1] = '\0';
63 static int verify_auth_trunc(struct nlattr
**attrs
)
65 struct nlattr
*rt
= attrs
[XFRMA_ALG_AUTH_TRUNC
];
66 struct xfrm_algo_auth
*algp
;
72 if (nla_len(rt
) < (int)xfrm_alg_auth_len(algp
))
75 algp
->alg_name
[sizeof(algp
->alg_name
) - 1] = '\0';
79 static int verify_aead(struct nlattr
**attrs
)
81 struct nlattr
*rt
= attrs
[XFRMA_ALG_AEAD
];
82 struct xfrm_algo_aead
*algp
;
88 if (nla_len(rt
) < (int)aead_len(algp
))
91 algp
->alg_name
[sizeof(algp
->alg_name
) - 1] = '\0';
95 static void verify_one_addr(struct nlattr
**attrs
, enum xfrm_attr_type_t type
,
96 xfrm_address_t
**addrp
)
98 struct nlattr
*rt
= attrs
[type
];
101 *addrp
= nla_data(rt
);
104 static inline int verify_sec_ctx_len(struct nlattr
**attrs
)
106 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
107 struct xfrm_user_sec_ctx
*uctx
;
113 if (uctx
->len
> nla_len(rt
) ||
114 uctx
->len
!= (sizeof(struct xfrm_user_sec_ctx
) + uctx
->ctx_len
))
120 static inline int verify_replay(struct xfrm_usersa_info
*p
,
121 struct nlattr
**attrs
)
123 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_ESN_VAL
];
124 struct xfrm_replay_state_esn
*rs
;
127 return (p
->flags
& XFRM_STATE_ESN
) ? -EINVAL
: 0;
131 if (rs
->bmp_len
> XFRMA_REPLAY_ESN_MAX
/ sizeof(rs
->bmp
[0]) / 8)
134 if (nla_len(rt
) < (int)xfrm_replay_state_esn_len(rs
) &&
135 nla_len(rt
) != sizeof(*rs
))
138 /* As only ESP and AH support ESN feature. */
139 if ((p
->id
.proto
!= IPPROTO_ESP
) && (p
->id
.proto
!= IPPROTO_AH
))
142 if (p
->replay_window
!= 0)
148 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
149 struct nlattr
**attrs
)
159 #if IS_ENABLED(CONFIG_IPV6)
170 switch (p
->sel
.family
) {
175 if (p
->sel
.prefixlen_d
> 32 || p
->sel
.prefixlen_s
> 32)
181 #if IS_ENABLED(CONFIG_IPV6)
182 if (p
->sel
.prefixlen_d
> 128 || p
->sel
.prefixlen_s
> 128)
196 switch (p
->id
.proto
) {
198 if ((!attrs
[XFRMA_ALG_AUTH
] &&
199 !attrs
[XFRMA_ALG_AUTH_TRUNC
]) ||
200 attrs
[XFRMA_ALG_AEAD
] ||
201 attrs
[XFRMA_ALG_CRYPT
] ||
202 attrs
[XFRMA_ALG_COMP
] ||
208 if (attrs
[XFRMA_ALG_COMP
])
210 if (!attrs
[XFRMA_ALG_AUTH
] &&
211 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
212 !attrs
[XFRMA_ALG_CRYPT
] &&
213 !attrs
[XFRMA_ALG_AEAD
])
215 if ((attrs
[XFRMA_ALG_AUTH
] ||
216 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
217 attrs
[XFRMA_ALG_CRYPT
]) &&
218 attrs
[XFRMA_ALG_AEAD
])
220 if (attrs
[XFRMA_TFCPAD
] &&
221 p
->mode
!= XFRM_MODE_TUNNEL
)
226 if (!attrs
[XFRMA_ALG_COMP
] ||
227 attrs
[XFRMA_ALG_AEAD
] ||
228 attrs
[XFRMA_ALG_AUTH
] ||
229 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
230 attrs
[XFRMA_ALG_CRYPT
] ||
231 attrs
[XFRMA_TFCPAD
] ||
232 (ntohl(p
->id
.spi
) >= 0x10000))
236 #if IS_ENABLED(CONFIG_IPV6)
237 case IPPROTO_DSTOPTS
:
238 case IPPROTO_ROUTING
:
239 if (attrs
[XFRMA_ALG_COMP
] ||
240 attrs
[XFRMA_ALG_AUTH
] ||
241 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
242 attrs
[XFRMA_ALG_AEAD
] ||
243 attrs
[XFRMA_ALG_CRYPT
] ||
244 attrs
[XFRMA_ENCAP
] ||
245 attrs
[XFRMA_SEC_CTX
] ||
246 attrs
[XFRMA_TFCPAD
] ||
247 !attrs
[XFRMA_COADDR
])
256 if ((err
= verify_aead(attrs
)))
258 if ((err
= verify_auth_trunc(attrs
)))
260 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_AUTH
)))
262 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_CRYPT
)))
264 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_COMP
)))
266 if ((err
= verify_sec_ctx_len(attrs
)))
268 if ((err
= verify_replay(p
, attrs
)))
273 case XFRM_MODE_TRANSPORT
:
274 case XFRM_MODE_TUNNEL
:
275 case XFRM_MODE_ROUTEOPTIMIZATION
:
289 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
290 struct xfrm_algo_desc
*(*get_byname
)(const char *, int),
293 struct xfrm_algo
*p
, *ualg
;
294 struct xfrm_algo_desc
*algo
;
299 ualg
= nla_data(rta
);
301 algo
= get_byname(ualg
->alg_name
, 1);
304 *props
= algo
->desc
.sadb_alg_id
;
306 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
310 strcpy(p
->alg_name
, algo
->name
);
315 static int attach_crypt(struct xfrm_state
*x
, struct nlattr
*rta
)
317 struct xfrm_algo
*p
, *ualg
;
318 struct xfrm_algo_desc
*algo
;
323 ualg
= nla_data(rta
);
325 algo
= xfrm_ealg_get_byname(ualg
->alg_name
, 1);
328 x
->props
.ealgo
= algo
->desc
.sadb_alg_id
;
330 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
334 strcpy(p
->alg_name
, algo
->name
);
336 x
->geniv
= algo
->uinfo
.encr
.geniv
;
340 static int attach_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
343 struct xfrm_algo
*ualg
;
344 struct xfrm_algo_auth
*p
;
345 struct xfrm_algo_desc
*algo
;
350 ualg
= nla_data(rta
);
352 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
355 *props
= algo
->desc
.sadb_alg_id
;
357 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
361 strcpy(p
->alg_name
, algo
->name
);
362 p
->alg_key_len
= ualg
->alg_key_len
;
363 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
364 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
370 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
373 struct xfrm_algo_auth
*p
, *ualg
;
374 struct xfrm_algo_desc
*algo
;
379 ualg
= nla_data(rta
);
381 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
384 if (ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
386 *props
= algo
->desc
.sadb_alg_id
;
388 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
392 strcpy(p
->alg_name
, algo
->name
);
393 if (!p
->alg_trunc_len
)
394 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
400 static int attach_aead(struct xfrm_state
*x
, struct nlattr
*rta
)
402 struct xfrm_algo_aead
*p
, *ualg
;
403 struct xfrm_algo_desc
*algo
;
408 ualg
= nla_data(rta
);
410 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
413 x
->props
.ealgo
= algo
->desc
.sadb_alg_id
;
415 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
419 strcpy(p
->alg_name
, algo
->name
);
421 x
->geniv
= algo
->uinfo
.aead
.geniv
;
425 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn
*replay_esn
,
428 struct xfrm_replay_state_esn
*up
;
431 if (!replay_esn
|| !rp
)
435 ulen
= xfrm_replay_state_esn_len(up
);
437 /* Check the overall length and the internal bitmap length to avoid
438 * potential overflow. */
439 if (nla_len(rp
) < (int)ulen
||
440 xfrm_replay_state_esn_len(replay_esn
) != ulen
||
441 replay_esn
->bmp_len
!= up
->bmp_len
)
444 if (up
->replay_window
> up
->bmp_len
* sizeof(__u32
) * 8)
450 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn
**replay_esn
,
451 struct xfrm_replay_state_esn
**preplay_esn
,
454 struct xfrm_replay_state_esn
*p
, *pp
, *up
;
455 unsigned int klen
, ulen
;
461 klen
= xfrm_replay_state_esn_len(up
);
462 ulen
= nla_len(rta
) >= (int)klen
? klen
: sizeof(*up
);
464 p
= kzalloc(klen
, GFP_KERNEL
);
468 pp
= kzalloc(klen
, GFP_KERNEL
);
475 memcpy(pp
, up
, ulen
);
483 static inline unsigned int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
485 unsigned int len
= 0;
488 len
+= sizeof(struct xfrm_user_sec_ctx
);
489 len
+= xfrm_ctx
->ctx_len
;
494 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
496 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
497 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
498 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
499 x
->props
.mode
= p
->mode
;
500 x
->props
.replay_window
= min_t(unsigned int, p
->replay_window
,
501 sizeof(x
->replay
.bitmap
) * 8);
502 x
->props
.reqid
= p
->reqid
;
503 x
->props
.family
= p
->family
;
504 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
505 x
->props
.flags
= p
->flags
;
507 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
508 x
->sel
.family
= p
->family
;
512 * someday when pfkey also has support, we could have the code
513 * somehow made shareable and move it to xfrm_state.c - JHS
516 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
,
519 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
520 struct nlattr
*re
= update_esn
? attrs
[XFRMA_REPLAY_ESN_VAL
] : NULL
;
521 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
522 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
523 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
526 struct xfrm_replay_state_esn
*replay_esn
;
527 replay_esn
= nla_data(re
);
528 memcpy(x
->replay_esn
, replay_esn
,
529 xfrm_replay_state_esn_len(replay_esn
));
530 memcpy(x
->preplay_esn
, replay_esn
,
531 xfrm_replay_state_esn_len(replay_esn
));
535 struct xfrm_replay_state
*replay
;
536 replay
= nla_data(rp
);
537 memcpy(&x
->replay
, replay
, sizeof(*replay
));
538 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
542 struct xfrm_lifetime_cur
*ltime
;
543 ltime
= nla_data(lt
);
544 x
->curlft
.bytes
= ltime
->bytes
;
545 x
->curlft
.packets
= ltime
->packets
;
546 x
->curlft
.add_time
= ltime
->add_time
;
547 x
->curlft
.use_time
= ltime
->use_time
;
551 x
->replay_maxage
= nla_get_u32(et
);
554 x
->replay_maxdiff
= nla_get_u32(rt
);
557 static void xfrm_smark_init(struct nlattr
**attrs
, struct xfrm_mark
*m
)
559 if (attrs
[XFRMA_SET_MARK
]) {
560 m
->v
= nla_get_u32(attrs
[XFRMA_SET_MARK
]);
561 if (attrs
[XFRMA_SET_MARK_MASK
])
562 m
->m
= nla_get_u32(attrs
[XFRMA_SET_MARK_MASK
]);
570 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
571 struct xfrm_usersa_info
*p
,
572 struct nlattr
**attrs
,
575 struct xfrm_state
*x
= xfrm_state_alloc(net
);
581 copy_from_user_state(x
, p
);
583 if (attrs
[XFRMA_ENCAP
]) {
584 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
585 sizeof(*x
->encap
), GFP_KERNEL
);
586 if (x
->encap
== NULL
)
590 if (attrs
[XFRMA_COADDR
]) {
591 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
592 sizeof(*x
->coaddr
), GFP_KERNEL
);
593 if (x
->coaddr
== NULL
)
597 if (attrs
[XFRMA_SA_EXTRA_FLAGS
])
598 x
->props
.extra_flags
= nla_get_u32(attrs
[XFRMA_SA_EXTRA_FLAGS
]);
600 if ((err
= attach_aead(x
, attrs
[XFRMA_ALG_AEAD
])))
602 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
603 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
605 if (!x
->props
.aalgo
) {
606 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
607 attrs
[XFRMA_ALG_AUTH
])))
610 if ((err
= attach_crypt(x
, attrs
[XFRMA_ALG_CRYPT
])))
612 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
613 xfrm_calg_get_byname
,
614 attrs
[XFRMA_ALG_COMP
])))
617 if (attrs
[XFRMA_TFCPAD
])
618 x
->tfcpad
= nla_get_u32(attrs
[XFRMA_TFCPAD
]);
620 xfrm_mark_get(attrs
, &x
->mark
);
622 xfrm_smark_init(attrs
, &x
->props
.smark
);
624 if (attrs
[XFRMA_IF_ID
])
625 x
->if_id
= nla_get_u32(attrs
[XFRMA_IF_ID
]);
627 err
= __xfrm_init_state(x
, false, attrs
[XFRMA_OFFLOAD_DEV
]);
631 if (attrs
[XFRMA_SEC_CTX
]) {
632 err
= security_xfrm_state_alloc(x
,
633 nla_data(attrs
[XFRMA_SEC_CTX
]));
638 if ((err
= xfrm_alloc_replay_state_esn(&x
->replay_esn
, &x
->preplay_esn
,
639 attrs
[XFRMA_REPLAY_ESN_VAL
])))
643 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
644 /* sysctl_xfrm_aevent_etime is in 100ms units */
645 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
647 if ((err
= xfrm_init_replay(x
)))
650 /* override default values from above */
651 xfrm_update_ae_params(x
, attrs
, 0);
653 /* configure the hardware if offload is requested */
654 if (attrs
[XFRMA_OFFLOAD_DEV
]) {
655 err
= xfrm_dev_state_add(net
, x
,
656 nla_data(attrs
[XFRMA_OFFLOAD_DEV
]));
664 x
->km
.state
= XFRM_STATE_DEAD
;
671 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
672 struct nlattr
**attrs
)
674 struct net
*net
= sock_net(skb
->sk
);
675 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
676 struct xfrm_state
*x
;
680 err
= verify_newsa_info(p
, attrs
);
684 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
689 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
690 err
= xfrm_state_add(x
);
692 err
= xfrm_state_update(x
);
694 xfrm_audit_state_add(x
, err
? 0 : 1, true);
697 x
->km
.state
= XFRM_STATE_DEAD
;
698 xfrm_dev_state_delete(x
);
703 if (x
->km
.state
== XFRM_STATE_VOID
)
704 x
->km
.state
= XFRM_STATE_VALID
;
706 c
.seq
= nlh
->nlmsg_seq
;
707 c
.portid
= nlh
->nlmsg_pid
;
708 c
.event
= nlh
->nlmsg_type
;
710 km_state_notify(x
, &c
);
716 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
717 struct xfrm_usersa_id
*p
,
718 struct nlattr
**attrs
,
721 struct xfrm_state
*x
= NULL
;
724 u32 mark
= xfrm_mark_get(attrs
, &m
);
726 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
728 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
730 xfrm_address_t
*saddr
= NULL
;
732 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
739 x
= xfrm_state_lookup_byaddr(net
, mark
,
741 p
->proto
, p
->family
);
750 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
751 struct nlattr
**attrs
)
753 struct net
*net
= sock_net(skb
->sk
);
754 struct xfrm_state
*x
;
757 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
759 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
763 if ((err
= security_xfrm_state_delete(x
)) != 0)
766 if (xfrm_state_kern(x
)) {
771 err
= xfrm_state_delete(x
);
776 c
.seq
= nlh
->nlmsg_seq
;
777 c
.portid
= nlh
->nlmsg_pid
;
778 c
.event
= nlh
->nlmsg_type
;
779 km_state_notify(x
, &c
);
782 xfrm_audit_state_delete(x
, err
? 0 : 1, true);
787 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
789 memset(p
, 0, sizeof(*p
));
790 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
791 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
792 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
793 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
794 put_unaligned(x
->stats
.replay_window
, &p
->stats
.replay_window
);
795 put_unaligned(x
->stats
.replay
, &p
->stats
.replay
);
796 put_unaligned(x
->stats
.integrity_failed
, &p
->stats
.integrity_failed
);
797 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
798 p
->mode
= x
->props
.mode
;
799 p
->replay_window
= x
->props
.replay_window
;
800 p
->reqid
= x
->props
.reqid
;
801 p
->family
= x
->props
.family
;
802 p
->flags
= x
->props
.flags
;
806 struct xfrm_dump_info
{
807 struct sk_buff
*in_skb
;
808 struct sk_buff
*out_skb
;
813 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
815 struct xfrm_user_sec_ctx
*uctx
;
817 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
819 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
823 uctx
= nla_data(attr
);
824 uctx
->exttype
= XFRMA_SEC_CTX
;
825 uctx
->len
= ctx_size
;
826 uctx
->ctx_doi
= s
->ctx_doi
;
827 uctx
->ctx_alg
= s
->ctx_alg
;
828 uctx
->ctx_len
= s
->ctx_len
;
829 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
834 static int copy_user_offload(struct xfrm_state_offload
*xso
, struct sk_buff
*skb
)
836 struct xfrm_user_offload
*xuo
;
839 attr
= nla_reserve(skb
, XFRMA_OFFLOAD_DEV
, sizeof(*xuo
));
843 xuo
= nla_data(attr
);
844 memset(xuo
, 0, sizeof(*xuo
));
845 xuo
->ifindex
= xso
->dev
->ifindex
;
846 xuo
->flags
= xso
->flags
;
851 static bool xfrm_redact(void)
853 return IS_ENABLED(CONFIG_SECURITY
) &&
854 security_locked_down(LOCKDOWN_XFRM_SECRET
);
857 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
859 struct xfrm_algo
*algo
;
860 struct xfrm_algo_auth
*ap
;
862 bool redact_secret
= xfrm_redact();
864 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
865 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
868 algo
= nla_data(nla
);
869 strncpy(algo
->alg_name
, auth
->alg_name
, sizeof(algo
->alg_name
));
871 if (redact_secret
&& auth
->alg_key_len
)
872 memset(algo
->alg_key
, 0, (auth
->alg_key_len
+ 7) / 8);
874 memcpy(algo
->alg_key
, auth
->alg_key
,
875 (auth
->alg_key_len
+ 7) / 8);
876 algo
->alg_key_len
= auth
->alg_key_len
;
878 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH_TRUNC
, xfrm_alg_auth_len(auth
));
882 memcpy(ap
, auth
, sizeof(struct xfrm_algo_auth
));
883 if (redact_secret
&& auth
->alg_key_len
)
884 memset(ap
->alg_key
, 0, (auth
->alg_key_len
+ 7) / 8);
886 memcpy(ap
->alg_key
, auth
->alg_key
,
887 (auth
->alg_key_len
+ 7) / 8);
891 static int copy_to_user_aead(struct xfrm_algo_aead
*aead
, struct sk_buff
*skb
)
893 struct nlattr
*nla
= nla_reserve(skb
, XFRMA_ALG_AEAD
, aead_len(aead
));
894 struct xfrm_algo_aead
*ap
;
895 bool redact_secret
= xfrm_redact();
901 memcpy(ap
, aead
, sizeof(*aead
));
903 if (redact_secret
&& aead
->alg_key_len
)
904 memset(ap
->alg_key
, 0, (aead
->alg_key_len
+ 7) / 8);
906 memcpy(ap
->alg_key
, aead
->alg_key
,
907 (aead
->alg_key_len
+ 7) / 8);
911 static int copy_to_user_ealg(struct xfrm_algo
*ealg
, struct sk_buff
*skb
)
913 struct xfrm_algo
*ap
;
914 bool redact_secret
= xfrm_redact();
915 struct nlattr
*nla
= nla_reserve(skb
, XFRMA_ALG_CRYPT
,
921 memcpy(ap
, ealg
, sizeof(*ealg
));
923 if (redact_secret
&& ealg
->alg_key_len
)
924 memset(ap
->alg_key
, 0, (ealg
->alg_key_len
+ 7) / 8);
926 memcpy(ap
->alg_key
, ealg
->alg_key
,
927 (ealg
->alg_key_len
+ 7) / 8);
932 static int xfrm_smark_put(struct sk_buff
*skb
, struct xfrm_mark
*m
)
937 ret
= nla_put_u32(skb
, XFRMA_SET_MARK
, m
->v
);
939 ret
= nla_put_u32(skb
, XFRMA_SET_MARK_MASK
, m
->m
);
944 /* Don't change this without updating xfrm_sa_len! */
945 static int copy_to_user_state_extra(struct xfrm_state
*x
,
946 struct xfrm_usersa_info
*p
,
951 copy_to_user_state(x
, p
);
953 if (x
->props
.extra_flags
) {
954 ret
= nla_put_u32(skb
, XFRMA_SA_EXTRA_FLAGS
,
955 x
->props
.extra_flags
);
961 ret
= nla_put(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
966 ret
= nla_put_u64_64bit(skb
, XFRMA_LASTUSED
, x
->lastused
,
972 ret
= copy_to_user_aead(x
->aead
, skb
);
977 ret
= copy_to_user_auth(x
->aalg
, skb
);
982 ret
= copy_to_user_ealg(x
->ealg
, skb
);
987 ret
= nla_put(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
992 ret
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
997 ret
= nla_put_u32(skb
, XFRMA_TFCPAD
, x
->tfcpad
);
1001 ret
= xfrm_mark_put(skb
, &x
->mark
);
1005 ret
= xfrm_smark_put(skb
, &x
->props
.smark
);
1010 ret
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
1011 xfrm_replay_state_esn_len(x
->replay_esn
),
1014 ret
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
1019 ret
= copy_user_offload(&x
->xso
, skb
);
1023 ret
= nla_put_u32(skb
, XFRMA_IF_ID
, x
->if_id
);
1028 ret
= copy_sec_ctx(x
->security
, skb
);
1033 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
1035 struct xfrm_dump_info
*sp
= ptr
;
1036 struct sk_buff
*in_skb
= sp
->in_skb
;
1037 struct sk_buff
*skb
= sp
->out_skb
;
1038 struct xfrm_translator
*xtr
;
1039 struct xfrm_usersa_info
*p
;
1040 struct nlmsghdr
*nlh
;
1043 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
1044 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
1048 p
= nlmsg_data(nlh
);
1050 err
= copy_to_user_state_extra(x
, p
, skb
);
1052 nlmsg_cancel(skb
, nlh
);
1055 nlmsg_end(skb
, nlh
);
1057 xtr
= xfrm_get_translator();
1059 err
= xtr
->alloc_compat(skb
, nlh
);
1061 xfrm_put_translator(xtr
);
1063 nlmsg_cancel(skb
, nlh
);
1071 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
1073 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
1074 struct sock
*sk
= cb
->skb
->sk
;
1075 struct net
*net
= sock_net(sk
);
1078 xfrm_state_walk_done(walk
, net
);
1082 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1084 struct net
*net
= sock_net(skb
->sk
);
1085 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
1086 struct xfrm_dump_info info
;
1088 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
1089 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1091 info
.in_skb
= cb
->skb
;
1093 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1094 info
.nlmsg_flags
= NLM_F_MULTI
;
1097 struct nlattr
*attrs
[XFRMA_MAX
+1];
1098 struct xfrm_address_filter
*filter
= NULL
;
1102 err
= nlmsg_parse_deprecated(cb
->nlh
, 0, attrs
, XFRMA_MAX
,
1103 xfrma_policy
, cb
->extack
);
1107 if (attrs
[XFRMA_ADDRESS_FILTER
]) {
1108 filter
= kmemdup(nla_data(attrs
[XFRMA_ADDRESS_FILTER
]),
1109 sizeof(*filter
), GFP_KERNEL
);
1114 if (attrs
[XFRMA_PROTO
])
1115 proto
= nla_get_u8(attrs
[XFRMA_PROTO
]);
1117 xfrm_state_walk_init(walk
, proto
, filter
);
1121 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
1126 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
1127 struct xfrm_state
*x
, u32 seq
)
1129 struct xfrm_dump_info info
;
1130 struct sk_buff
*skb
;
1133 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
1135 return ERR_PTR(-ENOMEM
);
1137 info
.in_skb
= in_skb
;
1139 info
.nlmsg_seq
= seq
;
1140 info
.nlmsg_flags
= 0;
1142 err
= dump_one_state(x
, 0, &info
);
1145 return ERR_PTR(err
);
1151 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
1152 * Must be called with RCU read lock.
1154 static inline int xfrm_nlmsg_multicast(struct net
*net
, struct sk_buff
*skb
,
1155 u32 pid
, unsigned int group
)
1157 struct sock
*nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1158 struct xfrm_translator
*xtr
;
1165 xtr
= xfrm_get_translator();
1167 int err
= xtr
->alloc_compat(skb
, nlmsg_hdr(skb
));
1169 xfrm_put_translator(xtr
);
1176 return nlmsg_multicast(nlsk
, skb
, pid
, group
, GFP_ATOMIC
);
1179 static inline unsigned int xfrm_spdinfo_msgsize(void)
1181 return NLMSG_ALIGN(4)
1182 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
1183 + nla_total_size(sizeof(struct xfrmu_spdhinfo
))
1184 + nla_total_size(sizeof(struct xfrmu_spdhthresh
))
1185 + nla_total_size(sizeof(struct xfrmu_spdhthresh
));
1188 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
1189 u32 portid
, u32 seq
, u32 flags
)
1191 struct xfrmk_spdinfo si
;
1192 struct xfrmu_spdinfo spc
;
1193 struct xfrmu_spdhinfo sph
;
1194 struct xfrmu_spdhthresh spt4
, spt6
;
1195 struct nlmsghdr
*nlh
;
1200 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
1201 if (nlh
== NULL
) /* shouldn't really happen ... */
1204 f
= nlmsg_data(nlh
);
1206 xfrm_spd_getinfo(net
, &si
);
1207 spc
.incnt
= si
.incnt
;
1208 spc
.outcnt
= si
.outcnt
;
1209 spc
.fwdcnt
= si
.fwdcnt
;
1210 spc
.inscnt
= si
.inscnt
;
1211 spc
.outscnt
= si
.outscnt
;
1212 spc
.fwdscnt
= si
.fwdscnt
;
1213 sph
.spdhcnt
= si
.spdhcnt
;
1214 sph
.spdhmcnt
= si
.spdhmcnt
;
1217 lseq
= read_seqbegin(&net
->xfrm
.policy_hthresh
.lock
);
1219 spt4
.lbits
= net
->xfrm
.policy_hthresh
.lbits4
;
1220 spt4
.rbits
= net
->xfrm
.policy_hthresh
.rbits4
;
1221 spt6
.lbits
= net
->xfrm
.policy_hthresh
.lbits6
;
1222 spt6
.rbits
= net
->xfrm
.policy_hthresh
.rbits6
;
1223 } while (read_seqretry(&net
->xfrm
.policy_hthresh
.lock
, lseq
));
1225 err
= nla_put(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
1227 err
= nla_put(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
1229 err
= nla_put(skb
, XFRMA_SPD_IPV4_HTHRESH
, sizeof(spt4
), &spt4
);
1231 err
= nla_put(skb
, XFRMA_SPD_IPV6_HTHRESH
, sizeof(spt6
), &spt6
);
1233 nlmsg_cancel(skb
, nlh
);
1237 nlmsg_end(skb
, nlh
);
1241 static int xfrm_set_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1242 struct nlattr
**attrs
)
1244 struct net
*net
= sock_net(skb
->sk
);
1245 struct xfrmu_spdhthresh
*thresh4
= NULL
;
1246 struct xfrmu_spdhthresh
*thresh6
= NULL
;
1248 /* selector prefixlen thresholds to hash policies */
1249 if (attrs
[XFRMA_SPD_IPV4_HTHRESH
]) {
1250 struct nlattr
*rta
= attrs
[XFRMA_SPD_IPV4_HTHRESH
];
1252 if (nla_len(rta
) < sizeof(*thresh4
))
1254 thresh4
= nla_data(rta
);
1255 if (thresh4
->lbits
> 32 || thresh4
->rbits
> 32)
1258 if (attrs
[XFRMA_SPD_IPV6_HTHRESH
]) {
1259 struct nlattr
*rta
= attrs
[XFRMA_SPD_IPV6_HTHRESH
];
1261 if (nla_len(rta
) < sizeof(*thresh6
))
1263 thresh6
= nla_data(rta
);
1264 if (thresh6
->lbits
> 128 || thresh6
->rbits
> 128)
1268 if (thresh4
|| thresh6
) {
1269 write_seqlock(&net
->xfrm
.policy_hthresh
.lock
);
1271 net
->xfrm
.policy_hthresh
.lbits4
= thresh4
->lbits
;
1272 net
->xfrm
.policy_hthresh
.rbits4
= thresh4
->rbits
;
1275 net
->xfrm
.policy_hthresh
.lbits6
= thresh6
->lbits
;
1276 net
->xfrm
.policy_hthresh
.rbits6
= thresh6
->rbits
;
1278 write_sequnlock(&net
->xfrm
.policy_hthresh
.lock
);
1280 xfrm_policy_hash_rebuild(net
);
1286 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1287 struct nlattr
**attrs
)
1289 struct net
*net
= sock_net(skb
->sk
);
1290 struct sk_buff
*r_skb
;
1291 u32
*flags
= nlmsg_data(nlh
);
1292 u32 sportid
= NETLINK_CB(skb
).portid
;
1293 u32 seq
= nlh
->nlmsg_seq
;
1296 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
1300 err
= build_spdinfo(r_skb
, net
, sportid
, seq
, *flags
);
1303 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1306 static inline unsigned int xfrm_sadinfo_msgsize(void)
1308 return NLMSG_ALIGN(4)
1309 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
1310 + nla_total_size(4); /* XFRMA_SAD_CNT */
1313 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
1314 u32 portid
, u32 seq
, u32 flags
)
1316 struct xfrmk_sadinfo si
;
1317 struct xfrmu_sadhinfo sh
;
1318 struct nlmsghdr
*nlh
;
1322 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
1323 if (nlh
== NULL
) /* shouldn't really happen ... */
1326 f
= nlmsg_data(nlh
);
1328 xfrm_sad_getinfo(net
, &si
);
1330 sh
.sadhmcnt
= si
.sadhmcnt
;
1331 sh
.sadhcnt
= si
.sadhcnt
;
1333 err
= nla_put_u32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
1335 err
= nla_put(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
1337 nlmsg_cancel(skb
, nlh
);
1341 nlmsg_end(skb
, nlh
);
1345 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1346 struct nlattr
**attrs
)
1348 struct net
*net
= sock_net(skb
->sk
);
1349 struct sk_buff
*r_skb
;
1350 u32
*flags
= nlmsg_data(nlh
);
1351 u32 sportid
= NETLINK_CB(skb
).portid
;
1352 u32 seq
= nlh
->nlmsg_seq
;
1355 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
1359 err
= build_sadinfo(r_skb
, net
, sportid
, seq
, *flags
);
1362 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1365 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1366 struct nlattr
**attrs
)
1368 struct net
*net
= sock_net(skb
->sk
);
1369 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
1370 struct xfrm_state
*x
;
1371 struct sk_buff
*resp_skb
;
1374 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
1378 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1379 if (IS_ERR(resp_skb
)) {
1380 err
= PTR_ERR(resp_skb
);
1382 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1389 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1390 struct nlattr
**attrs
)
1392 struct net
*net
= sock_net(skb
->sk
);
1393 struct xfrm_state
*x
;
1394 struct xfrm_userspi_info
*p
;
1395 struct xfrm_translator
*xtr
;
1396 struct sk_buff
*resp_skb
;
1397 xfrm_address_t
*daddr
;
1404 p
= nlmsg_data(nlh
);
1405 err
= verify_spi_info(p
->info
.id
.proto
, p
->min
, p
->max
);
1409 family
= p
->info
.family
;
1410 daddr
= &p
->info
.id
.daddr
;
1414 mark
= xfrm_mark_get(attrs
, &m
);
1416 if (attrs
[XFRMA_IF_ID
])
1417 if_id
= nla_get_u32(attrs
[XFRMA_IF_ID
]);
1420 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
1421 if (x
&& !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
)) {
1428 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
1429 if_id
, p
->info
.id
.proto
, daddr
,
1436 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
1440 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1441 if (IS_ERR(resp_skb
)) {
1442 err
= PTR_ERR(resp_skb
);
1446 xtr
= xfrm_get_translator();
1448 err
= xtr
->alloc_compat(skb
, nlmsg_hdr(skb
));
1450 xfrm_put_translator(xtr
);
1452 kfree_skb(resp_skb
);
1457 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1465 static int verify_policy_dir(u8 dir
)
1468 case XFRM_POLICY_IN
:
1469 case XFRM_POLICY_OUT
:
1470 case XFRM_POLICY_FWD
:
1480 static int verify_policy_type(u8 type
)
1483 case XFRM_POLICY_TYPE_MAIN
:
1484 #ifdef CONFIG_XFRM_SUB_POLICY
1485 case XFRM_POLICY_TYPE_SUB
:
1496 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1501 case XFRM_SHARE_ANY
:
1502 case XFRM_SHARE_SESSION
:
1503 case XFRM_SHARE_USER
:
1504 case XFRM_SHARE_UNIQUE
:
1511 switch (p
->action
) {
1512 case XFRM_POLICY_ALLOW
:
1513 case XFRM_POLICY_BLOCK
:
1520 switch (p
->sel
.family
) {
1522 if (p
->sel
.prefixlen_d
> 32 || p
->sel
.prefixlen_s
> 32)
1528 #if IS_ENABLED(CONFIG_IPV6)
1529 if (p
->sel
.prefixlen_d
> 128 || p
->sel
.prefixlen_s
> 128)
1534 return -EAFNOSUPPORT
;
1541 ret
= verify_policy_dir(p
->dir
);
1544 if (p
->index
&& (xfrm_policy_id2dir(p
->index
) != p
->dir
))
1550 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1552 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1553 struct xfrm_user_sec_ctx
*uctx
;
1558 uctx
= nla_data(rt
);
1559 return security_xfrm_policy_alloc(&pol
->security
, uctx
, GFP_KERNEL
);
1562 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1568 for (i
= 0; i
< nr
; i
++, ut
++) {
1569 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1571 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1572 memcpy(&t
->saddr
, &ut
->saddr
,
1573 sizeof(xfrm_address_t
));
1574 t
->reqid
= ut
->reqid
;
1576 t
->share
= ut
->share
;
1577 t
->optional
= ut
->optional
;
1578 t
->aalgos
= ut
->aalgos
;
1579 t
->ealgos
= ut
->ealgos
;
1580 t
->calgos
= ut
->calgos
;
1581 /* If all masks are ~0, then we allow all algorithms. */
1582 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1583 t
->encap_family
= ut
->family
;
1587 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1592 if (nr
> XFRM_MAX_DEPTH
)
1595 prev_family
= family
;
1597 for (i
= 0; i
< nr
; i
++) {
1598 /* We never validated the ut->family value, so many
1599 * applications simply leave it at zero. The check was
1600 * never made and ut->family was ignored because all
1601 * templates could be assumed to have the same family as
1602 * the policy itself. Now that we will have ipv4-in-ipv6
1603 * and ipv6-in-ipv4 tunnels, this is no longer true.
1606 ut
[i
].family
= family
;
1608 switch (ut
[i
].mode
) {
1609 case XFRM_MODE_TUNNEL
:
1610 case XFRM_MODE_BEET
:
1613 if (ut
[i
].family
!= prev_family
)
1617 if (ut
[i
].mode
>= XFRM_MODE_MAX
)
1620 prev_family
= ut
[i
].family
;
1622 switch (ut
[i
].family
) {
1625 #if IS_ENABLED(CONFIG_IPV6)
1633 if (!xfrm_id_proto_valid(ut
[i
].id
.proto
))
1640 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1642 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1647 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1648 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1651 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1655 copy_templates(pol
, utmpl
, nr
);
1660 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1662 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1663 struct xfrm_userpolicy_type
*upt
;
1664 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1672 err
= verify_policy_type(type
);
1680 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1682 xp
->priority
= p
->priority
;
1683 xp
->index
= p
->index
;
1684 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1685 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1686 xp
->action
= p
->action
;
1687 xp
->flags
= p
->flags
;
1688 xp
->family
= p
->sel
.family
;
1689 /* XXX xp->share = p->share; */
1692 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1694 memset(p
, 0, sizeof(*p
));
1695 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1696 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1697 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1698 p
->priority
= xp
->priority
;
1699 p
->index
= xp
->index
;
1700 p
->sel
.family
= xp
->family
;
1702 p
->action
= xp
->action
;
1703 p
->flags
= xp
->flags
;
1704 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1707 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1709 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1717 copy_from_user_policy(xp
, p
);
1719 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1723 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1724 err
= copy_from_user_sec_ctx(xp
, attrs
);
1728 xfrm_mark_get(attrs
, &xp
->mark
);
1730 if (attrs
[XFRMA_IF_ID
])
1731 xp
->if_id
= nla_get_u32(attrs
[XFRMA_IF_ID
]);
1737 xfrm_policy_destroy(xp
);
1741 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1742 struct nlattr
**attrs
)
1744 struct net
*net
= sock_net(skb
->sk
);
1745 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1746 struct xfrm_policy
*xp
;
1751 err
= verify_newpolicy_info(p
);
1754 err
= verify_sec_ctx_len(attrs
);
1758 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1762 /* shouldn't excl be based on nlh flags??
1763 * Aha! this is anti-netlink really i.e more pfkey derived
1764 * in netlink excl is a flag and you wouldn't need
1765 * a type XFRM_MSG_UPDPOLICY - JHS */
1766 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1767 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1768 xfrm_audit_policy_add(xp
, err
? 0 : 1, true);
1771 security_xfrm_policy_free(xp
->security
);
1776 c
.event
= nlh
->nlmsg_type
;
1777 c
.seq
= nlh
->nlmsg_seq
;
1778 c
.portid
= nlh
->nlmsg_pid
;
1779 km_policy_notify(xp
, p
->dir
, &c
);
1786 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1788 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1791 if (xp
->xfrm_nr
== 0)
1794 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1795 struct xfrm_user_tmpl
*up
= &vec
[i
];
1796 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1798 memset(up
, 0, sizeof(*up
));
1799 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1800 up
->family
= kp
->encap_family
;
1801 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1802 up
->reqid
= kp
->reqid
;
1803 up
->mode
= kp
->mode
;
1804 up
->share
= kp
->share
;
1805 up
->optional
= kp
->optional
;
1806 up
->aalgos
= kp
->aalgos
;
1807 up
->ealgos
= kp
->ealgos
;
1808 up
->calgos
= kp
->calgos
;
1811 return nla_put(skb
, XFRMA_TMPL
,
1812 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1815 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1818 return copy_sec_ctx(x
->security
, skb
);
1823 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1826 return copy_sec_ctx(xp
->security
, skb
);
1829 static inline unsigned int userpolicy_type_attrsize(void)
1831 #ifdef CONFIG_XFRM_SUB_POLICY
1832 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1838 #ifdef CONFIG_XFRM_SUB_POLICY
1839 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1841 struct xfrm_userpolicy_type upt
;
1843 /* Sadly there are two holes in struct xfrm_userpolicy_type */
1844 memset(&upt
, 0, sizeof(upt
));
1847 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1851 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1857 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1859 struct xfrm_dump_info
*sp
= ptr
;
1860 struct xfrm_userpolicy_info
*p
;
1861 struct sk_buff
*in_skb
= sp
->in_skb
;
1862 struct sk_buff
*skb
= sp
->out_skb
;
1863 struct xfrm_translator
*xtr
;
1864 struct nlmsghdr
*nlh
;
1867 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
1868 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1872 p
= nlmsg_data(nlh
);
1873 copy_to_user_policy(xp
, p
, dir
);
1874 err
= copy_to_user_tmpl(xp
, skb
);
1876 err
= copy_to_user_sec_ctx(xp
, skb
);
1878 err
= copy_to_user_policy_type(xp
->type
, skb
);
1880 err
= xfrm_mark_put(skb
, &xp
->mark
);
1882 err
= xfrm_if_id_put(skb
, xp
->if_id
);
1884 nlmsg_cancel(skb
, nlh
);
1887 nlmsg_end(skb
, nlh
);
1889 xtr
= xfrm_get_translator();
1891 err
= xtr
->alloc_compat(skb
, nlh
);
1893 xfrm_put_translator(xtr
);
1895 nlmsg_cancel(skb
, nlh
);
1903 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1905 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*)cb
->args
;
1906 struct net
*net
= sock_net(cb
->skb
->sk
);
1908 xfrm_policy_walk_done(walk
, net
);
1912 static int xfrm_dump_policy_start(struct netlink_callback
*cb
)
1914 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*)cb
->args
;
1916 BUILD_BUG_ON(sizeof(*walk
) > sizeof(cb
->args
));
1918 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1922 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1924 struct net
*net
= sock_net(skb
->sk
);
1925 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*)cb
->args
;
1926 struct xfrm_dump_info info
;
1928 info
.in_skb
= cb
->skb
;
1930 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1931 info
.nlmsg_flags
= NLM_F_MULTI
;
1933 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1938 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1939 struct xfrm_policy
*xp
,
1942 struct xfrm_dump_info info
;
1943 struct sk_buff
*skb
;
1946 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1948 return ERR_PTR(-ENOMEM
);
1950 info
.in_skb
= in_skb
;
1952 info
.nlmsg_seq
= seq
;
1953 info
.nlmsg_flags
= 0;
1955 err
= dump_one_policy(xp
, dir
, 0, &info
);
1958 return ERR_PTR(err
);
1964 static int xfrm_set_default(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1965 struct nlattr
**attrs
)
1967 struct net
*net
= sock_net(skb
->sk
);
1968 struct xfrm_userpolicy_default
*up
= nlmsg_data(nlh
);
1970 u8 old_default
= net
->xfrm
.policy_default
;
1972 if (up
->dirmask
>= XFRM_USERPOLICY_DIRMASK_MAX
)
1975 dirmask
= (1 << up
->dirmask
) & XFRM_POL_DEFAULT_MASK
;
1977 net
->xfrm
.policy_default
= (old_default
& (0xff ^ dirmask
))
1978 | (up
->action
<< up
->dirmask
);
1980 rt_genid_bump_all(net
);
1985 static int xfrm_get_default(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1986 struct nlattr
**attrs
)
1988 struct sk_buff
*r_skb
;
1989 struct nlmsghdr
*r_nlh
;
1990 struct net
*net
= sock_net(skb
->sk
);
1991 struct xfrm_userpolicy_default
*r_up
, *up
;
1992 int len
= NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_default
));
1993 u32 portid
= NETLINK_CB(skb
).portid
;
1994 u32 seq
= nlh
->nlmsg_seq
;
1996 up
= nlmsg_data(nlh
);
1998 r_skb
= nlmsg_new(len
, GFP_ATOMIC
);
2002 r_nlh
= nlmsg_put(r_skb
, portid
, seq
, XFRM_MSG_GETDEFAULT
, sizeof(*r_up
), 0);
2008 r_up
= nlmsg_data(r_nlh
);
2010 r_up
->action
= ((net
->xfrm
.policy_default
& (1 << up
->dirmask
)) >> up
->dirmask
);
2011 r_up
->dirmask
= up
->dirmask
;
2012 nlmsg_end(r_skb
, r_nlh
);
2014 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, portid
);
2017 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2018 struct nlattr
**attrs
)
2020 struct net
*net
= sock_net(skb
->sk
);
2021 struct xfrm_policy
*xp
;
2022 struct xfrm_userpolicy_id
*p
;
2023 u8 type
= XFRM_POLICY_TYPE_MAIN
;
2030 p
= nlmsg_data(nlh
);
2031 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
2033 err
= copy_from_user_policy_type(&type
, attrs
);
2037 err
= verify_policy_dir(p
->dir
);
2041 if (attrs
[XFRMA_IF_ID
])
2042 if_id
= nla_get_u32(attrs
[XFRMA_IF_ID
]);
2044 xfrm_mark_get(attrs
, &m
);
2047 xp
= xfrm_policy_byid(net
, &m
, if_id
, type
, p
->dir
,
2048 p
->index
, delete, &err
);
2050 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
2051 struct xfrm_sec_ctx
*ctx
;
2053 err
= verify_sec_ctx_len(attrs
);
2059 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
2061 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
2065 xp
= xfrm_policy_bysel_ctx(net
, &m
, if_id
, type
, p
->dir
,
2066 &p
->sel
, ctx
, delete, &err
);
2067 security_xfrm_policy_free(ctx
);
2073 struct sk_buff
*resp_skb
;
2075 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
2076 if (IS_ERR(resp_skb
)) {
2077 err
= PTR_ERR(resp_skb
);
2079 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
2080 NETLINK_CB(skb
).portid
);
2083 xfrm_audit_policy_delete(xp
, err
? 0 : 1, true);
2088 c
.data
.byid
= p
->index
;
2089 c
.event
= nlh
->nlmsg_type
;
2090 c
.seq
= nlh
->nlmsg_seq
;
2091 c
.portid
= nlh
->nlmsg_pid
;
2092 km_policy_notify(xp
, p
->dir
, &c
);
2100 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2101 struct nlattr
**attrs
)
2103 struct net
*net
= sock_net(skb
->sk
);
2105 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
2108 err
= xfrm_state_flush(net
, p
->proto
, true, false);
2110 if (err
== -ESRCH
) /* empty table */
2114 c
.data
.proto
= p
->proto
;
2115 c
.event
= nlh
->nlmsg_type
;
2116 c
.seq
= nlh
->nlmsg_seq
;
2117 c
.portid
= nlh
->nlmsg_pid
;
2119 km_state_notify(NULL
, &c
);
2124 static inline unsigned int xfrm_aevent_msgsize(struct xfrm_state
*x
)
2126 unsigned int replay_size
= x
->replay_esn
?
2127 xfrm_replay_state_esn_len(x
->replay_esn
) :
2128 sizeof(struct xfrm_replay_state
);
2130 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
2131 + nla_total_size(replay_size
)
2132 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur
))
2133 + nla_total_size(sizeof(struct xfrm_mark
))
2134 + nla_total_size(4) /* XFRM_AE_RTHR */
2135 + nla_total_size(4); /* XFRM_AE_ETHR */
2138 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
2140 struct xfrm_aevent_id
*id
;
2141 struct nlmsghdr
*nlh
;
2144 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
2148 id
= nlmsg_data(nlh
);
2149 memset(&id
->sa_id
, 0, sizeof(id
->sa_id
));
2150 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
, sizeof(x
->id
.daddr
));
2151 id
->sa_id
.spi
= x
->id
.spi
;
2152 id
->sa_id
.family
= x
->props
.family
;
2153 id
->sa_id
.proto
= x
->id
.proto
;
2154 memcpy(&id
->saddr
, &x
->props
.saddr
, sizeof(x
->props
.saddr
));
2155 id
->reqid
= x
->props
.reqid
;
2156 id
->flags
= c
->data
.aevent
;
2158 if (x
->replay_esn
) {
2159 err
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
2160 xfrm_replay_state_esn_len(x
->replay_esn
),
2163 err
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
2168 err
= nla_put_64bit(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
,
2173 if (id
->flags
& XFRM_AE_RTHR
) {
2174 err
= nla_put_u32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
2178 if (id
->flags
& XFRM_AE_ETHR
) {
2179 err
= nla_put_u32(skb
, XFRMA_ETIMER_THRESH
,
2180 x
->replay_maxage
* 10 / HZ
);
2184 err
= xfrm_mark_put(skb
, &x
->mark
);
2188 err
= xfrm_if_id_put(skb
, x
->if_id
);
2192 nlmsg_end(skb
, nlh
);
2196 nlmsg_cancel(skb
, nlh
);
2200 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2201 struct nlattr
**attrs
)
2203 struct net
*net
= sock_net(skb
->sk
);
2204 struct xfrm_state
*x
;
2205 struct sk_buff
*r_skb
;
2210 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
2211 struct xfrm_usersa_id
*id
= &p
->sa_id
;
2213 mark
= xfrm_mark_get(attrs
, &m
);
2215 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
2219 r_skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
2220 if (r_skb
== NULL
) {
2226 * XXX: is this lock really needed - none of the other
2227 * gets lock (the concern is things getting updated
2228 * while we are still reading) - jhs
2230 spin_lock_bh(&x
->lock
);
2231 c
.data
.aevent
= p
->flags
;
2232 c
.seq
= nlh
->nlmsg_seq
;
2233 c
.portid
= nlh
->nlmsg_pid
;
2235 err
= build_aevent(r_skb
, x
, &c
);
2238 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).portid
);
2239 spin_unlock_bh(&x
->lock
);
2244 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2245 struct nlattr
**attrs
)
2247 struct net
*net
= sock_net(skb
->sk
);
2248 struct xfrm_state
*x
;
2253 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
2254 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
2255 struct nlattr
*re
= attrs
[XFRMA_REPLAY_ESN_VAL
];
2256 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
2257 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
2258 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
2260 if (!lt
&& !rp
&& !re
&& !et
&& !rt
)
2263 /* pedantic mode - thou shalt sayeth replaceth */
2264 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
2267 mark
= xfrm_mark_get(attrs
, &m
);
2269 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
2273 if (x
->km
.state
!= XFRM_STATE_VALID
)
2276 err
= xfrm_replay_verify_len(x
->replay_esn
, re
);
2280 spin_lock_bh(&x
->lock
);
2281 xfrm_update_ae_params(x
, attrs
, 1);
2282 spin_unlock_bh(&x
->lock
);
2284 c
.event
= nlh
->nlmsg_type
;
2285 c
.seq
= nlh
->nlmsg_seq
;
2286 c
.portid
= nlh
->nlmsg_pid
;
2287 c
.data
.aevent
= XFRM_AE_CU
;
2288 km_state_notify(x
, &c
);
2295 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2296 struct nlattr
**attrs
)
2298 struct net
*net
= sock_net(skb
->sk
);
2300 u8 type
= XFRM_POLICY_TYPE_MAIN
;
2303 err
= copy_from_user_policy_type(&type
, attrs
);
2307 err
= xfrm_policy_flush(net
, type
, true);
2309 if (err
== -ESRCH
) /* empty table */
2315 c
.event
= nlh
->nlmsg_type
;
2316 c
.seq
= nlh
->nlmsg_seq
;
2317 c
.portid
= nlh
->nlmsg_pid
;
2319 km_policy_notify(NULL
, 0, &c
);
2323 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2324 struct nlattr
**attrs
)
2326 struct net
*net
= sock_net(skb
->sk
);
2327 struct xfrm_policy
*xp
;
2328 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
2329 struct xfrm_userpolicy_info
*p
= &up
->pol
;
2330 u8 type
= XFRM_POLICY_TYPE_MAIN
;
2335 err
= copy_from_user_policy_type(&type
, attrs
);
2339 err
= verify_policy_dir(p
->dir
);
2343 if (attrs
[XFRMA_IF_ID
])
2344 if_id
= nla_get_u32(attrs
[XFRMA_IF_ID
]);
2346 xfrm_mark_get(attrs
, &m
);
2349 xp
= xfrm_policy_byid(net
, &m
, if_id
, type
, p
->dir
, p
->index
,
2352 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
2353 struct xfrm_sec_ctx
*ctx
;
2355 err
= verify_sec_ctx_len(attrs
);
2361 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
2363 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
2367 xp
= xfrm_policy_bysel_ctx(net
, &m
, if_id
, type
, p
->dir
,
2368 &p
->sel
, ctx
, 0, &err
);
2369 security_xfrm_policy_free(ctx
);
2374 if (unlikely(xp
->walk
.dead
))
2379 xfrm_policy_delete(xp
, p
->dir
);
2380 xfrm_audit_policy_delete(xp
, 1, true);
2382 km_policy_expired(xp
, p
->dir
, up
->hard
, nlh
->nlmsg_pid
);
2389 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2390 struct nlattr
**attrs
)
2392 struct net
*net
= sock_net(skb
->sk
);
2393 struct xfrm_state
*x
;
2395 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
2396 struct xfrm_usersa_info
*p
= &ue
->state
;
2398 u32 mark
= xfrm_mark_get(attrs
, &m
);
2400 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
2406 spin_lock_bh(&x
->lock
);
2408 if (x
->km
.state
!= XFRM_STATE_VALID
)
2410 km_state_expired(x
, ue
->hard
, nlh
->nlmsg_pid
);
2413 __xfrm_state_delete(x
);
2414 xfrm_audit_state_delete(x
, 1, true);
2418 spin_unlock_bh(&x
->lock
);
2423 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2424 struct nlattr
**attrs
)
2426 struct net
*net
= sock_net(skb
->sk
);
2427 struct xfrm_policy
*xp
;
2428 struct xfrm_user_tmpl
*ut
;
2430 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
2431 struct xfrm_mark mark
;
2433 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
2434 struct xfrm_state
*x
= xfrm_state_alloc(net
);
2440 xfrm_mark_get(attrs
, &mark
);
2442 err
= verify_newpolicy_info(&ua
->policy
);
2445 err
= verify_sec_ctx_len(attrs
);
2450 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
2454 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
2455 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
2456 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
2457 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
2458 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
2460 /* extract the templates and for each call km_key */
2461 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
2462 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
2463 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
2464 x
->props
.mode
= t
->mode
;
2465 x
->props
.reqid
= t
->reqid
;
2466 x
->props
.family
= ut
->family
;
2467 t
->aalgos
= ua
->aalgos
;
2468 t
->ealgos
= ua
->ealgos
;
2469 t
->calgos
= ua
->calgos
;
2470 err
= km_query(x
, t
, xp
);
2485 #ifdef CONFIG_XFRM_MIGRATE
2486 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
2487 struct xfrm_kmaddress
*k
,
2488 struct nlattr
**attrs
, int *num
)
2490 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
2491 struct xfrm_user_migrate
*um
;
2495 struct xfrm_user_kmaddress
*uk
;
2497 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
2498 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
2499 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
2500 k
->family
= uk
->family
;
2501 k
->reserved
= uk
->reserved
;
2505 num_migrate
= nla_len(rt
) / sizeof(*um
);
2507 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
2510 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
2511 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
2512 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
2513 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
2514 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
2516 ma
->proto
= um
->proto
;
2517 ma
->mode
= um
->mode
;
2518 ma
->reqid
= um
->reqid
;
2520 ma
->old_family
= um
->old_family
;
2521 ma
->new_family
= um
->new_family
;
2528 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2529 struct nlattr
**attrs
)
2531 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
2532 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
2533 struct xfrm_kmaddress km
, *kmp
;
2537 struct net
*net
= sock_net(skb
->sk
);
2538 struct xfrm_encap_tmpl
*encap
= NULL
;
2540 if (attrs
[XFRMA_MIGRATE
] == NULL
)
2543 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
2545 err
= copy_from_user_policy_type(&type
, attrs
);
2549 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
2556 if (attrs
[XFRMA_ENCAP
]) {
2557 encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
2558 sizeof(*encap
), GFP_KERNEL
);
2563 err
= xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
, net
, encap
);
2570 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2571 struct nlattr
**attrs
)
2573 return -ENOPROTOOPT
;
2577 #ifdef CONFIG_XFRM_MIGRATE
2578 static int copy_to_user_migrate(const struct xfrm_migrate
*m
, struct sk_buff
*skb
)
2580 struct xfrm_user_migrate um
;
2582 memset(&um
, 0, sizeof(um
));
2583 um
.proto
= m
->proto
;
2585 um
.reqid
= m
->reqid
;
2586 um
.old_family
= m
->old_family
;
2587 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
2588 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
2589 um
.new_family
= m
->new_family
;
2590 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
2591 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
2593 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
2596 static int copy_to_user_kmaddress(const struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
2598 struct xfrm_user_kmaddress uk
;
2600 memset(&uk
, 0, sizeof(uk
));
2601 uk
.family
= k
->family
;
2602 uk
.reserved
= k
->reserved
;
2603 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
2604 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
2606 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2609 static inline unsigned int xfrm_migrate_msgsize(int num_migrate
, int with_kma
,
2612 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2613 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2614 + (with_encp
? nla_total_size(sizeof(struct xfrm_encap_tmpl
)) : 0)
2615 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2616 + userpolicy_type_attrsize();
2619 static int build_migrate(struct sk_buff
*skb
, const struct xfrm_migrate
*m
,
2620 int num_migrate
, const struct xfrm_kmaddress
*k
,
2621 const struct xfrm_selector
*sel
,
2622 const struct xfrm_encap_tmpl
*encap
, u8 dir
, u8 type
)
2624 const struct xfrm_migrate
*mp
;
2625 struct xfrm_userpolicy_id
*pol_id
;
2626 struct nlmsghdr
*nlh
;
2629 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2633 pol_id
= nlmsg_data(nlh
);
2634 /* copy data from selector, dir, and type to the pol_id */
2635 memset(pol_id
, 0, sizeof(*pol_id
));
2636 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2640 err
= copy_to_user_kmaddress(k
, skb
);
2645 err
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*encap
), encap
);
2649 err
= copy_to_user_policy_type(type
, skb
);
2652 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2653 err
= copy_to_user_migrate(mp
, skb
);
2658 nlmsg_end(skb
, nlh
);
2662 nlmsg_cancel(skb
, nlh
);
2666 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2667 const struct xfrm_migrate
*m
, int num_migrate
,
2668 const struct xfrm_kmaddress
*k
,
2669 const struct xfrm_encap_tmpl
*encap
)
2671 struct net
*net
= &init_net
;
2672 struct sk_buff
*skb
;
2675 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
, !!encap
),
2681 err
= build_migrate(skb
, m
, num_migrate
, k
, sel
, encap
, dir
, type
);
2684 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_MIGRATE
);
2687 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2688 const struct xfrm_migrate
*m
, int num_migrate
,
2689 const struct xfrm_kmaddress
*k
,
2690 const struct xfrm_encap_tmpl
*encap
)
2692 return -ENOPROTOOPT
;
2696 #define XMSGSIZE(type) sizeof(struct type)
2698 const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2699 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2700 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2701 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2702 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2703 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2704 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2705 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2706 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2707 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2708 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2709 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2710 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2711 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2712 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2713 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2714 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2715 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2716 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2717 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2718 [XFRM_MSG_NEWSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2719 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2720 [XFRM_MSG_SETDEFAULT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_default
),
2721 [XFRM_MSG_GETDEFAULT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_default
),
2723 EXPORT_SYMBOL_GPL(xfrm_msg_min
);
2727 const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2728 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2729 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2730 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2731 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2732 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2733 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2734 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2735 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2736 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2737 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2738 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2739 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2740 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2741 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2742 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2743 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2744 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2745 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2746 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2747 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2748 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2749 [XFRMA_TFCPAD
] = { .type
= NLA_U32
},
2750 [XFRMA_REPLAY_ESN_VAL
] = { .len
= sizeof(struct xfrm_replay_state_esn
) },
2751 [XFRMA_SA_EXTRA_FLAGS
] = { .type
= NLA_U32
},
2752 [XFRMA_PROTO
] = { .type
= NLA_U8
},
2753 [XFRMA_ADDRESS_FILTER
] = { .len
= sizeof(struct xfrm_address_filter
) },
2754 [XFRMA_OFFLOAD_DEV
] = { .len
= sizeof(struct xfrm_user_offload
) },
2755 [XFRMA_SET_MARK
] = { .type
= NLA_U32
},
2756 [XFRMA_SET_MARK_MASK
] = { .type
= NLA_U32
},
2757 [XFRMA_IF_ID
] = { .type
= NLA_U32
},
2759 EXPORT_SYMBOL_GPL(xfrma_policy
);
2761 static const struct nla_policy xfrma_spd_policy
[XFRMA_SPD_MAX
+1] = {
2762 [XFRMA_SPD_IPV4_HTHRESH
] = { .len
= sizeof(struct xfrmu_spdhthresh
) },
2763 [XFRMA_SPD_IPV6_HTHRESH
] = { .len
= sizeof(struct xfrmu_spdhthresh
) },
2766 static const struct xfrm_link
{
2767 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2768 int (*start
)(struct netlink_callback
*);
2769 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2770 int (*done
)(struct netlink_callback
*);
2771 const struct nla_policy
*nla_pol
;
2773 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2774 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2775 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2776 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2777 .dump
= xfrm_dump_sa
,
2778 .done
= xfrm_dump_sa_done
},
2779 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2780 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2781 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2782 .start
= xfrm_dump_policy_start
,
2783 .dump
= xfrm_dump_policy
,
2784 .done
= xfrm_dump_policy_done
},
2785 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2786 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2787 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2788 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2789 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2790 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2791 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2792 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2793 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2794 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2795 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2796 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2797 [XFRM_MSG_NEWSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_set_spdinfo
,
2798 .nla_pol
= xfrma_spd_policy
,
2799 .nla_max
= XFRMA_SPD_MAX
},
2800 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2801 [XFRM_MSG_SETDEFAULT
- XFRM_MSG_BASE
] = { .doit
= xfrm_set_default
},
2802 [XFRM_MSG_GETDEFAULT
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_default
},
2805 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2806 struct netlink_ext_ack
*extack
)
2808 struct net
*net
= sock_net(skb
->sk
);
2809 struct nlattr
*attrs
[XFRMA_MAX
+1];
2810 const struct xfrm_link
*link
;
2811 struct nlmsghdr
*nlh64
= NULL
;
2814 type
= nlh
->nlmsg_type
;
2815 if (type
> XFRM_MSG_MAX
)
2818 type
-= XFRM_MSG_BASE
;
2819 link
= &xfrm_dispatch
[type
];
2821 /* All operations require privileges, even GET */
2822 if (!netlink_net_capable(skb
, CAP_NET_ADMIN
))
2825 if (in_compat_syscall()) {
2826 struct xfrm_translator
*xtr
= xfrm_get_translator();
2831 nlh64
= xtr
->rcv_msg_compat(nlh
, link
->nla_max
,
2832 link
->nla_pol
, extack
);
2833 xfrm_put_translator(xtr
);
2835 return PTR_ERR(nlh64
);
2840 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2841 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2842 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2843 struct netlink_dump_control c
= {
2844 .start
= link
->start
,
2849 if (link
->dump
== NULL
) {
2854 err
= netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, &c
);
2858 err
= nlmsg_parse_deprecated(nlh
, xfrm_msg_min
[type
], attrs
,
2859 link
->nla_max
? : XFRMA_MAX
,
2860 link
->nla_pol
? : xfrma_policy
, extack
);
2864 if (link
->doit
== NULL
) {
2869 err
= link
->doit(skb
, nlh
, attrs
);
2871 /* We need to free skb allocated in xfrm_alloc_compat() before
2872 * returning from this function, because consume_skb() won't take
2873 * care of frag_list since netlink destructor sets
2874 * sbk->head to NULL. (see netlink_skb_destructor())
2876 if (skb_has_frag_list(skb
)) {
2877 kfree_skb(skb_shinfo(skb
)->frag_list
);
2878 skb_shinfo(skb
)->frag_list
= NULL
;
2886 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2888 struct net
*net
= sock_net(skb
->sk
);
2890 mutex_lock(&net
->xfrm
.xfrm_cfg_mutex
);
2891 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2892 mutex_unlock(&net
->xfrm
.xfrm_cfg_mutex
);
2895 static inline unsigned int xfrm_expire_msgsize(void)
2897 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2898 + nla_total_size(sizeof(struct xfrm_mark
));
2901 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
2903 struct xfrm_user_expire
*ue
;
2904 struct nlmsghdr
*nlh
;
2907 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2911 ue
= nlmsg_data(nlh
);
2912 copy_to_user_state(x
, &ue
->state
);
2913 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2914 /* clear the padding bytes */
2915 memset(&ue
->hard
+ 1, 0, sizeof(*ue
) - offsetofend(typeof(*ue
), hard
));
2917 err
= xfrm_mark_put(skb
, &x
->mark
);
2921 err
= xfrm_if_id_put(skb
, x
->if_id
);
2925 nlmsg_end(skb
, nlh
);
2929 static int xfrm_exp_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2931 struct net
*net
= xs_net(x
);
2932 struct sk_buff
*skb
;
2934 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2938 if (build_expire(skb
, x
, c
) < 0) {
2943 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_EXPIRE
);
2946 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2948 struct net
*net
= xs_net(x
);
2949 struct sk_buff
*skb
;
2952 skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
2956 err
= build_aevent(skb
, x
, c
);
2959 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_AEVENTS
);
2962 static int xfrm_notify_sa_flush(const struct km_event
*c
)
2964 struct net
*net
= c
->net
;
2965 struct xfrm_usersa_flush
*p
;
2966 struct nlmsghdr
*nlh
;
2967 struct sk_buff
*skb
;
2968 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2970 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2974 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2980 p
= nlmsg_data(nlh
);
2981 p
->proto
= c
->data
.proto
;
2983 nlmsg_end(skb
, nlh
);
2985 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_SA
);
2988 static inline unsigned int xfrm_sa_len(struct xfrm_state
*x
)
2992 l
+= nla_total_size(aead_len(x
->aead
));
2994 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2995 (x
->aalg
->alg_key_len
+ 7) / 8);
2996 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2999 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
3001 l
+= nla_total_size(sizeof(*x
->calg
));
3003 l
+= nla_total_size(sizeof(*x
->encap
));
3005 l
+= nla_total_size(sizeof(x
->tfcpad
));
3007 l
+= nla_total_size(xfrm_replay_state_esn_len(x
->replay_esn
));
3009 l
+= nla_total_size(sizeof(struct xfrm_replay_state
));
3011 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
3012 x
->security
->ctx_len
);
3014 l
+= nla_total_size(sizeof(*x
->coaddr
));
3015 if (x
->props
.extra_flags
)
3016 l
+= nla_total_size(sizeof(x
->props
.extra_flags
));
3018 l
+= nla_total_size(sizeof(x
->xso
));
3019 if (x
->props
.smark
.v
| x
->props
.smark
.m
) {
3020 l
+= nla_total_size(sizeof(x
->props
.smark
.v
));
3021 l
+= nla_total_size(sizeof(x
->props
.smark
.m
));
3024 l
+= nla_total_size(sizeof(x
->if_id
));
3026 /* Must count x->lastused as it may become non-zero behind our back. */
3027 l
+= nla_total_size_64bit(sizeof(u64
));
3032 static int xfrm_notify_sa(struct xfrm_state
*x
, const struct km_event
*c
)
3034 struct net
*net
= xs_net(x
);
3035 struct xfrm_usersa_info
*p
;
3036 struct xfrm_usersa_id
*id
;
3037 struct nlmsghdr
*nlh
;
3038 struct sk_buff
*skb
;
3039 unsigned int len
= xfrm_sa_len(x
);
3040 unsigned int headlen
;
3043 headlen
= sizeof(*p
);
3044 if (c
->event
== XFRM_MSG_DELSA
) {
3045 len
+= nla_total_size(headlen
);
3046 headlen
= sizeof(*id
);
3047 len
+= nla_total_size(sizeof(struct xfrm_mark
));
3049 len
+= NLMSG_ALIGN(headlen
);
3051 skb
= nlmsg_new(len
, GFP_ATOMIC
);
3055 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
3060 p
= nlmsg_data(nlh
);
3061 if (c
->event
== XFRM_MSG_DELSA
) {
3062 struct nlattr
*attr
;
3064 id
= nlmsg_data(nlh
);
3065 memset(id
, 0, sizeof(*id
));
3066 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
3067 id
->spi
= x
->id
.spi
;
3068 id
->family
= x
->props
.family
;
3069 id
->proto
= x
->id
.proto
;
3071 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
3078 err
= copy_to_user_state_extra(x
, p
, skb
);
3082 nlmsg_end(skb
, nlh
);
3084 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_SA
);
3091 static int xfrm_send_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
3095 case XFRM_MSG_EXPIRE
:
3096 return xfrm_exp_state_notify(x
, c
);
3097 case XFRM_MSG_NEWAE
:
3098 return xfrm_aevent_state_notify(x
, c
);
3099 case XFRM_MSG_DELSA
:
3100 case XFRM_MSG_UPDSA
:
3101 case XFRM_MSG_NEWSA
:
3102 return xfrm_notify_sa(x
, c
);
3103 case XFRM_MSG_FLUSHSA
:
3104 return xfrm_notify_sa_flush(c
);
3106 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
3115 static inline unsigned int xfrm_acquire_msgsize(struct xfrm_state
*x
,
3116 struct xfrm_policy
*xp
)
3118 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
3119 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
3120 + nla_total_size(sizeof(struct xfrm_mark
))
3121 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
3122 + userpolicy_type_attrsize();
3125 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
3126 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
)
3128 __u32 seq
= xfrm_get_acqseq();
3129 struct xfrm_user_acquire
*ua
;
3130 struct nlmsghdr
*nlh
;
3133 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
3137 ua
= nlmsg_data(nlh
);
3138 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
3139 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
3140 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
3141 copy_to_user_policy(xp
, &ua
->policy
, XFRM_POLICY_OUT
);
3142 ua
->aalgos
= xt
->aalgos
;
3143 ua
->ealgos
= xt
->ealgos
;
3144 ua
->calgos
= xt
->calgos
;
3145 ua
->seq
= x
->km
.seq
= seq
;
3147 err
= copy_to_user_tmpl(xp
, skb
);
3149 err
= copy_to_user_state_sec_ctx(x
, skb
);
3151 err
= copy_to_user_policy_type(xp
->type
, skb
);
3153 err
= xfrm_mark_put(skb
, &xp
->mark
);
3155 err
= xfrm_if_id_put(skb
, xp
->if_id
);
3157 nlmsg_cancel(skb
, nlh
);
3161 nlmsg_end(skb
, nlh
);
3165 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
3166 struct xfrm_policy
*xp
)
3168 struct net
*net
= xs_net(x
);
3169 struct sk_buff
*skb
;
3172 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
3176 err
= build_acquire(skb
, x
, xt
, xp
);
3179 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_ACQUIRE
);
3182 /* User gives us xfrm_user_policy_info followed by an array of 0
3183 * or more templates.
3185 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
3186 u8
*data
, int len
, int *dir
)
3188 struct net
*net
= sock_net(sk
);
3189 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
3190 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
3191 struct xfrm_policy
*xp
;
3194 switch (sk
->sk_family
) {
3196 if (opt
!= IP_XFRM_POLICY
) {
3201 #if IS_ENABLED(CONFIG_IPV6)
3203 if (opt
!= IPV6_XFRM_POLICY
) {
3216 if (len
< sizeof(*p
) ||
3217 verify_newpolicy_info(p
))
3220 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
3221 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
3224 if (p
->dir
> XFRM_POLICY_OUT
)
3227 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
3233 copy_from_user_policy(xp
, p
);
3234 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
3235 copy_templates(xp
, ut
, nr
);
3242 static inline unsigned int xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
3244 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
3245 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
3246 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
3247 + nla_total_size(sizeof(struct xfrm_mark
))
3248 + userpolicy_type_attrsize();
3251 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
3252 int dir
, const struct km_event
*c
)
3254 struct xfrm_user_polexpire
*upe
;
3255 int hard
= c
->data
.hard
;
3256 struct nlmsghdr
*nlh
;
3259 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
3263 upe
= nlmsg_data(nlh
);
3264 copy_to_user_policy(xp
, &upe
->pol
, dir
);
3265 err
= copy_to_user_tmpl(xp
, skb
);
3267 err
= copy_to_user_sec_ctx(xp
, skb
);
3269 err
= copy_to_user_policy_type(xp
->type
, skb
);
3271 err
= xfrm_mark_put(skb
, &xp
->mark
);
3273 err
= xfrm_if_id_put(skb
, xp
->if_id
);
3275 nlmsg_cancel(skb
, nlh
);
3280 nlmsg_end(skb
, nlh
);
3284 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
3286 struct net
*net
= xp_net(xp
);
3287 struct sk_buff
*skb
;
3290 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
3294 err
= build_polexpire(skb
, xp
, dir
, c
);
3297 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_EXPIRE
);
3300 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
3302 unsigned int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
3303 struct net
*net
= xp_net(xp
);
3304 struct xfrm_userpolicy_info
*p
;
3305 struct xfrm_userpolicy_id
*id
;
3306 struct nlmsghdr
*nlh
;
3307 struct sk_buff
*skb
;
3308 unsigned int headlen
;
3311 headlen
= sizeof(*p
);
3312 if (c
->event
== XFRM_MSG_DELPOLICY
) {
3313 len
+= nla_total_size(headlen
);
3314 headlen
= sizeof(*id
);
3316 len
+= userpolicy_type_attrsize();
3317 len
+= nla_total_size(sizeof(struct xfrm_mark
));
3318 len
+= NLMSG_ALIGN(headlen
);
3320 skb
= nlmsg_new(len
, GFP_ATOMIC
);
3324 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
3329 p
= nlmsg_data(nlh
);
3330 if (c
->event
== XFRM_MSG_DELPOLICY
) {
3331 struct nlattr
*attr
;
3333 id
= nlmsg_data(nlh
);
3334 memset(id
, 0, sizeof(*id
));
3337 id
->index
= xp
->index
;
3339 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
3341 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
3349 copy_to_user_policy(xp
, p
, dir
);
3350 err
= copy_to_user_tmpl(xp
, skb
);
3352 err
= copy_to_user_policy_type(xp
->type
, skb
);
3354 err
= xfrm_mark_put(skb
, &xp
->mark
);
3356 err
= xfrm_if_id_put(skb
, xp
->if_id
);
3360 nlmsg_end(skb
, nlh
);
3362 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_POLICY
);
3369 static int xfrm_notify_policy_flush(const struct km_event
*c
)
3371 struct net
*net
= c
->net
;
3372 struct nlmsghdr
*nlh
;
3373 struct sk_buff
*skb
;
3376 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
3380 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
3384 err
= copy_to_user_policy_type(c
->data
.type
, skb
);
3388 nlmsg_end(skb
, nlh
);
3390 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_POLICY
);
3397 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
3401 case XFRM_MSG_NEWPOLICY
:
3402 case XFRM_MSG_UPDPOLICY
:
3403 case XFRM_MSG_DELPOLICY
:
3404 return xfrm_notify_policy(xp
, dir
, c
);
3405 case XFRM_MSG_FLUSHPOLICY
:
3406 return xfrm_notify_policy_flush(c
);
3407 case XFRM_MSG_POLEXPIRE
:
3408 return xfrm_exp_policy_notify(xp
, dir
, c
);
3410 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
3418 static inline unsigned int xfrm_report_msgsize(void)
3420 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
3423 static int build_report(struct sk_buff
*skb
, u8 proto
,
3424 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
3426 struct xfrm_user_report
*ur
;
3427 struct nlmsghdr
*nlh
;
3429 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
3433 ur
= nlmsg_data(nlh
);
3435 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
3438 int err
= nla_put(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
3440 nlmsg_cancel(skb
, nlh
);
3444 nlmsg_end(skb
, nlh
);
3448 static int xfrm_send_report(struct net
*net
, u8 proto
,
3449 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
3451 struct sk_buff
*skb
;
3454 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
3458 err
= build_report(skb
, proto
, sel
, addr
);
3461 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_REPORT
);
3464 static inline unsigned int xfrm_mapping_msgsize(void)
3466 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
3469 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
3470 xfrm_address_t
*new_saddr
, __be16 new_sport
)
3472 struct xfrm_user_mapping
*um
;
3473 struct nlmsghdr
*nlh
;
3475 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
3479 um
= nlmsg_data(nlh
);
3481 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
3482 um
->id
.spi
= x
->id
.spi
;
3483 um
->id
.family
= x
->props
.family
;
3484 um
->id
.proto
= x
->id
.proto
;
3485 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
3486 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
3487 um
->new_sport
= new_sport
;
3488 um
->old_sport
= x
->encap
->encap_sport
;
3489 um
->reqid
= x
->props
.reqid
;
3491 nlmsg_end(skb
, nlh
);
3495 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
3498 struct net
*net
= xs_net(x
);
3499 struct sk_buff
*skb
;
3502 if (x
->id
.proto
!= IPPROTO_ESP
)
3508 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
3512 err
= build_mapping(skb
, x
, ipaddr
, sport
);
3515 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_MAPPING
);
3518 static bool xfrm_is_alive(const struct km_event
*c
)
3520 return (bool)xfrm_acquire_is_on(c
->net
);
3523 static struct xfrm_mgr netlink_mgr
= {
3524 .notify
= xfrm_send_state_notify
,
3525 .acquire
= xfrm_send_acquire
,
3526 .compile_policy
= xfrm_compile_policy
,
3527 .notify_policy
= xfrm_send_policy_notify
,
3528 .report
= xfrm_send_report
,
3529 .migrate
= xfrm_send_migrate
,
3530 .new_mapping
= xfrm_send_mapping
,
3531 .is_alive
= xfrm_is_alive
,
3534 static int __net_init
xfrm_user_net_init(struct net
*net
)
3537 struct netlink_kernel_cfg cfg
= {
3538 .groups
= XFRMNLGRP_MAX
,
3539 .input
= xfrm_netlink_rcv
,
3542 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, &cfg
);
3545 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
3546 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
3550 static void __net_exit
xfrm_user_net_pre_exit(struct net
*net
)
3552 RCU_INIT_POINTER(net
->xfrm
.nlsk
, NULL
);
3555 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
3559 list_for_each_entry(net
, net_exit_list
, exit_list
)
3560 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
3563 static struct pernet_operations xfrm_user_net_ops
= {
3564 .init
= xfrm_user_net_init
,
3565 .pre_exit
= xfrm_user_net_pre_exit
,
3566 .exit_batch
= xfrm_user_net_exit
,
3569 static int __init
xfrm_user_init(void)
3573 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
3575 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
3578 rv
= xfrm_register_km(&netlink_mgr
);
3580 unregister_pernet_subsys(&xfrm_user_net_ops
);
3584 static void __exit
xfrm_user_exit(void)
3586 xfrm_unregister_km(&netlink_mgr
);
3587 unregister_pernet_subsys(&xfrm_user_net_ops
);
3590 module_init(xfrm_user_init
);
3591 module_exit(xfrm_user_exit
);
3592 MODULE_LICENSE("GPL");
3593 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);