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 <asm/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
35 static int verify_one_alg(struct nlattr
**attrs
, enum xfrm_attr_type_t type
)
37 struct nlattr
*rt
= attrs
[type
];
38 struct xfrm_algo
*algp
;
44 if (nla_len(rt
) < xfrm_alg_len(algp
))
57 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
61 static int verify_auth_trunc(struct nlattr
**attrs
)
63 struct nlattr
*rt
= attrs
[XFRMA_ALG_AUTH_TRUNC
];
64 struct xfrm_algo_auth
*algp
;
70 if (nla_len(rt
) < xfrm_alg_auth_len(algp
))
73 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
77 static int verify_aead(struct nlattr
**attrs
)
79 struct nlattr
*rt
= attrs
[XFRMA_ALG_AEAD
];
80 struct xfrm_algo_aead
*algp
;
86 if (nla_len(rt
) < aead_len(algp
))
89 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
93 static void verify_one_addr(struct nlattr
**attrs
, enum xfrm_attr_type_t type
,
94 xfrm_address_t
**addrp
)
96 struct nlattr
*rt
= attrs
[type
];
99 *addrp
= nla_data(rt
);
102 static inline int verify_sec_ctx_len(struct nlattr
**attrs
)
104 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
105 struct xfrm_user_sec_ctx
*uctx
;
111 if (uctx
->len
!= (sizeof(struct xfrm_user_sec_ctx
) + uctx
->ctx_len
))
117 static inline int verify_replay(struct xfrm_usersa_info
*p
,
118 struct nlattr
**attrs
)
120 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_ESN_VAL
];
121 struct xfrm_replay_state_esn
*rs
;
123 if (p
->flags
& XFRM_STATE_ESN
) {
129 if (rs
->bmp_len
> XFRMA_REPLAY_ESN_MAX
/ sizeof(rs
->bmp
[0]) / 8)
132 if (nla_len(rt
) < xfrm_replay_state_esn_len(rs
) &&
133 nla_len(rt
) != sizeof(*rs
))
140 /* As only ESP and AH support ESN feature. */
141 if ((p
->id
.proto
!= IPPROTO_ESP
) && (p
->id
.proto
!= IPPROTO_AH
))
144 if (p
->replay_window
!= 0)
150 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
151 struct nlattr
**attrs
)
161 #if IS_ENABLED(CONFIG_IPV6)
173 switch (p
->id
.proto
) {
175 if ((!attrs
[XFRMA_ALG_AUTH
] &&
176 !attrs
[XFRMA_ALG_AUTH_TRUNC
]) ||
177 attrs
[XFRMA_ALG_AEAD
] ||
178 attrs
[XFRMA_ALG_CRYPT
] ||
179 attrs
[XFRMA_ALG_COMP
] ||
180 attrs
[XFRMA_TFCPAD
] ||
181 (ntohl(p
->id
.spi
) >= 0x10000))
187 if (attrs
[XFRMA_ALG_COMP
])
189 if (!attrs
[XFRMA_ALG_AUTH
] &&
190 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
191 !attrs
[XFRMA_ALG_CRYPT
] &&
192 !attrs
[XFRMA_ALG_AEAD
])
194 if ((attrs
[XFRMA_ALG_AUTH
] ||
195 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
196 attrs
[XFRMA_ALG_CRYPT
]) &&
197 attrs
[XFRMA_ALG_AEAD
])
199 if (attrs
[XFRMA_TFCPAD
] &&
200 p
->mode
!= XFRM_MODE_TUNNEL
)
205 if (!attrs
[XFRMA_ALG_COMP
] ||
206 attrs
[XFRMA_ALG_AEAD
] ||
207 attrs
[XFRMA_ALG_AUTH
] ||
208 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
209 attrs
[XFRMA_ALG_CRYPT
] ||
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_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
296 struct xfrm_algo
*ualg
;
297 struct xfrm_algo_auth
*p
;
298 struct xfrm_algo_desc
*algo
;
303 ualg
= nla_data(rta
);
305 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
308 *props
= algo
->desc
.sadb_alg_id
;
310 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
314 strcpy(p
->alg_name
, algo
->name
);
315 p
->alg_key_len
= ualg
->alg_key_len
;
316 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
317 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
323 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
326 struct xfrm_algo_auth
*p
, *ualg
;
327 struct xfrm_algo_desc
*algo
;
332 ualg
= nla_data(rta
);
334 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
337 if ((ualg
->alg_trunc_len
/ 8) > MAX_AH_AUTH_LEN
||
338 ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
340 *props
= algo
->desc
.sadb_alg_id
;
342 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
346 strcpy(p
->alg_name
, algo
->name
);
347 if (!p
->alg_trunc_len
)
348 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
354 static int attach_aead(struct xfrm_algo_aead
**algpp
, u8
*props
,
357 struct xfrm_algo_aead
*p
, *ualg
;
358 struct xfrm_algo_desc
*algo
;
363 ualg
= nla_data(rta
);
365 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
368 *props
= algo
->desc
.sadb_alg_id
;
370 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
374 strcpy(p
->alg_name
, algo
->name
);
379 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn
*replay_esn
,
382 struct xfrm_replay_state_esn
*up
;
385 if (!replay_esn
|| !rp
)
389 ulen
= xfrm_replay_state_esn_len(up
);
391 if (nla_len(rp
) < ulen
|| xfrm_replay_state_esn_len(replay_esn
) != ulen
)
397 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn
**replay_esn
,
398 struct xfrm_replay_state_esn
**preplay_esn
,
401 struct xfrm_replay_state_esn
*p
, *pp
, *up
;
408 klen
= xfrm_replay_state_esn_len(up
);
409 ulen
= nla_len(rta
) >= klen
? klen
: sizeof(*up
);
411 p
= kzalloc(klen
, GFP_KERNEL
);
415 pp
= kzalloc(klen
, GFP_KERNEL
);
422 memcpy(pp
, up
, ulen
);
430 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
435 len
+= sizeof(struct xfrm_user_sec_ctx
);
436 len
+= xfrm_ctx
->ctx_len
;
441 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
443 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
444 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
445 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
446 x
->props
.mode
= p
->mode
;
447 x
->props
.replay_window
= min_t(unsigned int, p
->replay_window
,
448 sizeof(x
->replay
.bitmap
) * 8);
449 x
->props
.reqid
= p
->reqid
;
450 x
->props
.family
= p
->family
;
451 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
452 x
->props
.flags
= p
->flags
;
454 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
455 x
->sel
.family
= p
->family
;
459 * someday when pfkey also has support, we could have the code
460 * somehow made shareable and move it to xfrm_state.c - JHS
463 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
,
466 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
467 struct nlattr
*re
= update_esn
? attrs
[XFRMA_REPLAY_ESN_VAL
] : NULL
;
468 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
469 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
470 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
473 struct xfrm_replay_state_esn
*replay_esn
;
474 replay_esn
= nla_data(re
);
475 memcpy(x
->replay_esn
, replay_esn
,
476 xfrm_replay_state_esn_len(replay_esn
));
477 memcpy(x
->preplay_esn
, replay_esn
,
478 xfrm_replay_state_esn_len(replay_esn
));
482 struct xfrm_replay_state
*replay
;
483 replay
= nla_data(rp
);
484 memcpy(&x
->replay
, replay
, sizeof(*replay
));
485 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
489 struct xfrm_lifetime_cur
*ltime
;
490 ltime
= nla_data(lt
);
491 x
->curlft
.bytes
= ltime
->bytes
;
492 x
->curlft
.packets
= ltime
->packets
;
493 x
->curlft
.add_time
= ltime
->add_time
;
494 x
->curlft
.use_time
= ltime
->use_time
;
498 x
->replay_maxage
= nla_get_u32(et
);
501 x
->replay_maxdiff
= nla_get_u32(rt
);
504 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
505 struct xfrm_usersa_info
*p
,
506 struct nlattr
**attrs
,
509 struct xfrm_state
*x
= xfrm_state_alloc(net
);
515 copy_from_user_state(x
, p
);
517 if (attrs
[XFRMA_SA_EXTRA_FLAGS
])
518 x
->props
.extra_flags
= nla_get_u32(attrs
[XFRMA_SA_EXTRA_FLAGS
]);
520 if ((err
= attach_aead(&x
->aead
, &x
->props
.ealgo
,
521 attrs
[XFRMA_ALG_AEAD
])))
523 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
524 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
526 if (!x
->props
.aalgo
) {
527 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
528 attrs
[XFRMA_ALG_AUTH
])))
531 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
532 xfrm_ealg_get_byname
,
533 attrs
[XFRMA_ALG_CRYPT
])))
535 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
536 xfrm_calg_get_byname
,
537 attrs
[XFRMA_ALG_COMP
])))
540 if (attrs
[XFRMA_ENCAP
]) {
541 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
542 sizeof(*x
->encap
), GFP_KERNEL
);
543 if (x
->encap
== NULL
)
547 if (attrs
[XFRMA_TFCPAD
])
548 x
->tfcpad
= nla_get_u32(attrs
[XFRMA_TFCPAD
]);
550 if (attrs
[XFRMA_COADDR
]) {
551 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
552 sizeof(*x
->coaddr
), GFP_KERNEL
);
553 if (x
->coaddr
== NULL
)
557 xfrm_mark_get(attrs
, &x
->mark
);
559 err
= __xfrm_init_state(x
, false);
563 if (attrs
[XFRMA_SEC_CTX
] &&
564 security_xfrm_state_alloc(x
, nla_data(attrs
[XFRMA_SEC_CTX
])))
567 if ((err
= xfrm_alloc_replay_state_esn(&x
->replay_esn
, &x
->preplay_esn
,
568 attrs
[XFRMA_REPLAY_ESN_VAL
])))
572 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
573 /* sysctl_xfrm_aevent_etime is in 100ms units */
574 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
576 if ((err
= xfrm_init_replay(x
)))
579 /* override default values from above */
580 xfrm_update_ae_params(x
, attrs
, 0);
585 x
->km
.state
= XFRM_STATE_DEAD
;
592 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
593 struct nlattr
**attrs
)
595 struct net
*net
= sock_net(skb
->sk
);
596 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
597 struct xfrm_state
*x
;
600 kuid_t loginuid
= audit_get_loginuid(current
);
601 unsigned int sessionid
= audit_get_sessionid(current
);
604 err
= verify_newsa_info(p
, attrs
);
608 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
613 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
614 err
= xfrm_state_add(x
);
616 err
= xfrm_state_update(x
);
618 security_task_getsecid(current
, &sid
);
619 xfrm_audit_state_add(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
622 x
->km
.state
= XFRM_STATE_DEAD
;
627 c
.seq
= nlh
->nlmsg_seq
;
628 c
.portid
= nlh
->nlmsg_pid
;
629 c
.event
= nlh
->nlmsg_type
;
631 km_state_notify(x
, &c
);
637 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
638 struct xfrm_usersa_id
*p
,
639 struct nlattr
**attrs
,
642 struct xfrm_state
*x
= NULL
;
645 u32 mark
= xfrm_mark_get(attrs
, &m
);
647 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
649 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
651 xfrm_address_t
*saddr
= NULL
;
653 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
660 x
= xfrm_state_lookup_byaddr(net
, mark
,
662 p
->proto
, p
->family
);
671 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
672 struct nlattr
**attrs
)
674 struct net
*net
= sock_net(skb
->sk
);
675 struct xfrm_state
*x
;
678 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
679 kuid_t loginuid
= audit_get_loginuid(current
);
680 unsigned int sessionid
= audit_get_sessionid(current
);
683 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
687 if ((err
= security_xfrm_state_delete(x
)) != 0)
690 if (xfrm_state_kern(x
)) {
695 err
= xfrm_state_delete(x
);
700 c
.seq
= nlh
->nlmsg_seq
;
701 c
.portid
= nlh
->nlmsg_pid
;
702 c
.event
= nlh
->nlmsg_type
;
703 km_state_notify(x
, &c
);
706 security_task_getsecid(current
, &sid
);
707 xfrm_audit_state_delete(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
712 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
714 memset(p
, 0, sizeof(*p
));
715 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
716 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
717 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
718 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
719 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
720 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
721 p
->mode
= x
->props
.mode
;
722 p
->replay_window
= x
->props
.replay_window
;
723 p
->reqid
= x
->props
.reqid
;
724 p
->family
= x
->props
.family
;
725 p
->flags
= x
->props
.flags
;
729 struct xfrm_dump_info
{
730 struct sk_buff
*in_skb
;
731 struct sk_buff
*out_skb
;
736 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
738 struct xfrm_user_sec_ctx
*uctx
;
740 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
742 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
746 uctx
= nla_data(attr
);
747 uctx
->exttype
= XFRMA_SEC_CTX
;
748 uctx
->len
= ctx_size
;
749 uctx
->ctx_doi
= s
->ctx_doi
;
750 uctx
->ctx_alg
= s
->ctx_alg
;
751 uctx
->ctx_len
= s
->ctx_len
;
752 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
757 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
759 struct xfrm_algo
*algo
;
762 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
763 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
767 algo
= nla_data(nla
);
768 strncpy(algo
->alg_name
, auth
->alg_name
, sizeof(algo
->alg_name
));
769 memcpy(algo
->alg_key
, auth
->alg_key
, (auth
->alg_key_len
+ 7) / 8);
770 algo
->alg_key_len
= auth
->alg_key_len
;
775 /* Don't change this without updating xfrm_sa_len! */
776 static int copy_to_user_state_extra(struct xfrm_state
*x
,
777 struct xfrm_usersa_info
*p
,
782 copy_to_user_state(x
, p
);
784 if (x
->props
.extra_flags
) {
785 ret
= nla_put_u32(skb
, XFRMA_SA_EXTRA_FLAGS
,
786 x
->props
.extra_flags
);
792 ret
= nla_put(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
797 ret
= nla_put_u64(skb
, XFRMA_LASTUSED
, x
->lastused
);
802 ret
= nla_put(skb
, XFRMA_ALG_AEAD
, aead_len(x
->aead
), x
->aead
);
807 ret
= copy_to_user_auth(x
->aalg
, skb
);
809 ret
= nla_put(skb
, XFRMA_ALG_AUTH_TRUNC
,
810 xfrm_alg_auth_len(x
->aalg
), x
->aalg
);
815 ret
= nla_put(skb
, XFRMA_ALG_CRYPT
, xfrm_alg_len(x
->ealg
), x
->ealg
);
820 ret
= nla_put(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
825 ret
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
830 ret
= nla_put_u32(skb
, XFRMA_TFCPAD
, x
->tfcpad
);
834 ret
= xfrm_mark_put(skb
, &x
->mark
);
838 ret
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
839 xfrm_replay_state_esn_len(x
->replay_esn
),
845 ret
= copy_sec_ctx(x
->security
, skb
);
850 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
852 struct xfrm_dump_info
*sp
= ptr
;
853 struct sk_buff
*in_skb
= sp
->in_skb
;
854 struct sk_buff
*skb
= sp
->out_skb
;
855 struct xfrm_usersa_info
*p
;
856 struct nlmsghdr
*nlh
;
859 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
860 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
866 err
= copy_to_user_state_extra(x
, p
, skb
);
868 nlmsg_cancel(skb
, nlh
);
875 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
877 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
878 struct sock
*sk
= cb
->skb
->sk
;
879 struct net
*net
= sock_net(sk
);
881 xfrm_state_walk_done(walk
, net
);
885 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1];
886 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
888 struct net
*net
= sock_net(skb
->sk
);
889 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
890 struct xfrm_dump_info info
;
892 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
893 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
895 info
.in_skb
= cb
->skb
;
897 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
898 info
.nlmsg_flags
= NLM_F_MULTI
;
901 struct nlattr
*attrs
[XFRMA_MAX
+1];
902 struct xfrm_address_filter
*filter
= NULL
;
908 err
= nlmsg_parse(cb
->nlh
, 0, attrs
, XFRMA_MAX
,
913 if (attrs
[XFRMA_ADDRESS_FILTER
]) {
914 filter
= kmalloc(sizeof(*filter
), GFP_KERNEL
);
918 memcpy(filter
, nla_data(attrs
[XFRMA_ADDRESS_FILTER
]),
922 if (attrs
[XFRMA_PROTO
])
923 proto
= nla_get_u8(attrs
[XFRMA_PROTO
]);
925 xfrm_state_walk_init(walk
, proto
, filter
);
928 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
933 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
934 struct xfrm_state
*x
, u32 seq
)
936 struct xfrm_dump_info info
;
940 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
942 return ERR_PTR(-ENOMEM
);
944 info
.in_skb
= in_skb
;
946 info
.nlmsg_seq
= seq
;
947 info
.nlmsg_flags
= 0;
949 err
= dump_one_state(x
, 0, &info
);
958 static inline size_t xfrm_spdinfo_msgsize(void)
960 return NLMSG_ALIGN(4)
961 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
962 + nla_total_size(sizeof(struct xfrmu_spdhinfo
));
965 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
966 u32 portid
, u32 seq
, u32 flags
)
968 struct xfrmk_spdinfo si
;
969 struct xfrmu_spdinfo spc
;
970 struct xfrmu_spdhinfo sph
;
971 struct nlmsghdr
*nlh
;
975 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
976 if (nlh
== NULL
) /* shouldn't really happen ... */
981 xfrm_spd_getinfo(net
, &si
);
982 spc
.incnt
= si
.incnt
;
983 spc
.outcnt
= si
.outcnt
;
984 spc
.fwdcnt
= si
.fwdcnt
;
985 spc
.inscnt
= si
.inscnt
;
986 spc
.outscnt
= si
.outscnt
;
987 spc
.fwdscnt
= si
.fwdscnt
;
988 sph
.spdhcnt
= si
.spdhcnt
;
989 sph
.spdhmcnt
= si
.spdhmcnt
;
991 err
= nla_put(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
993 err
= nla_put(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
995 nlmsg_cancel(skb
, nlh
);
999 return nlmsg_end(skb
, nlh
);
1002 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1003 struct nlattr
**attrs
)
1005 struct net
*net
= sock_net(skb
->sk
);
1006 struct sk_buff
*r_skb
;
1007 u32
*flags
= nlmsg_data(nlh
);
1008 u32 sportid
= NETLINK_CB(skb
).portid
;
1009 u32 seq
= nlh
->nlmsg_seq
;
1011 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
1015 if (build_spdinfo(r_skb
, net
, sportid
, seq
, *flags
) < 0)
1018 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1021 static inline size_t xfrm_sadinfo_msgsize(void)
1023 return NLMSG_ALIGN(4)
1024 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
1025 + nla_total_size(4); /* XFRMA_SAD_CNT */
1028 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
1029 u32 portid
, u32 seq
, u32 flags
)
1031 struct xfrmk_sadinfo si
;
1032 struct xfrmu_sadhinfo sh
;
1033 struct nlmsghdr
*nlh
;
1037 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
1038 if (nlh
== NULL
) /* shouldn't really happen ... */
1041 f
= nlmsg_data(nlh
);
1043 xfrm_sad_getinfo(net
, &si
);
1045 sh
.sadhmcnt
= si
.sadhmcnt
;
1046 sh
.sadhcnt
= si
.sadhcnt
;
1048 err
= nla_put_u32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
1050 err
= nla_put(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
1052 nlmsg_cancel(skb
, nlh
);
1056 return nlmsg_end(skb
, nlh
);
1059 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1060 struct nlattr
**attrs
)
1062 struct net
*net
= sock_net(skb
->sk
);
1063 struct sk_buff
*r_skb
;
1064 u32
*flags
= nlmsg_data(nlh
);
1065 u32 sportid
= NETLINK_CB(skb
).portid
;
1066 u32 seq
= nlh
->nlmsg_seq
;
1068 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
1072 if (build_sadinfo(r_skb
, net
, sportid
, seq
, *flags
) < 0)
1075 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1078 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1079 struct nlattr
**attrs
)
1081 struct net
*net
= sock_net(skb
->sk
);
1082 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
1083 struct xfrm_state
*x
;
1084 struct sk_buff
*resp_skb
;
1087 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
1091 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1092 if (IS_ERR(resp_skb
)) {
1093 err
= PTR_ERR(resp_skb
);
1095 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1102 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1103 struct nlattr
**attrs
)
1105 struct net
*net
= sock_net(skb
->sk
);
1106 struct xfrm_state
*x
;
1107 struct xfrm_userspi_info
*p
;
1108 struct sk_buff
*resp_skb
;
1109 xfrm_address_t
*daddr
;
1115 p
= nlmsg_data(nlh
);
1116 err
= verify_spi_info(p
->info
.id
.proto
, p
->min
, p
->max
);
1120 family
= p
->info
.family
;
1121 daddr
= &p
->info
.id
.daddr
;
1125 mark
= xfrm_mark_get(attrs
, &m
);
1127 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
1128 if (x
&& !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
)) {
1135 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
1136 p
->info
.id
.proto
, daddr
,
1143 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
1147 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1148 if (IS_ERR(resp_skb
)) {
1149 err
= PTR_ERR(resp_skb
);
1153 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1161 static int verify_policy_dir(u8 dir
)
1164 case XFRM_POLICY_IN
:
1165 case XFRM_POLICY_OUT
:
1166 case XFRM_POLICY_FWD
:
1176 static int verify_policy_type(u8 type
)
1179 case XFRM_POLICY_TYPE_MAIN
:
1180 #ifdef CONFIG_XFRM_SUB_POLICY
1181 case XFRM_POLICY_TYPE_SUB
:
1192 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1197 case XFRM_SHARE_ANY
:
1198 case XFRM_SHARE_SESSION
:
1199 case XFRM_SHARE_USER
:
1200 case XFRM_SHARE_UNIQUE
:
1207 switch (p
->action
) {
1208 case XFRM_POLICY_ALLOW
:
1209 case XFRM_POLICY_BLOCK
:
1216 switch (p
->sel
.family
) {
1221 #if IS_ENABLED(CONFIG_IPV6)
1224 return -EAFNOSUPPORT
;
1231 ret
= verify_policy_dir(p
->dir
);
1234 if (p
->index
&& ((p
->index
& XFRM_POLICY_MAX
) != p
->dir
))
1240 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1242 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1243 struct xfrm_user_sec_ctx
*uctx
;
1248 uctx
= nla_data(rt
);
1249 return security_xfrm_policy_alloc(&pol
->security
, uctx
, GFP_KERNEL
);
1252 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1258 for (i
= 0; i
< nr
; i
++, ut
++) {
1259 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1261 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1262 memcpy(&t
->saddr
, &ut
->saddr
,
1263 sizeof(xfrm_address_t
));
1264 t
->reqid
= ut
->reqid
;
1266 t
->share
= ut
->share
;
1267 t
->optional
= ut
->optional
;
1268 t
->aalgos
= ut
->aalgos
;
1269 t
->ealgos
= ut
->ealgos
;
1270 t
->calgos
= ut
->calgos
;
1271 /* If all masks are ~0, then we allow all algorithms. */
1272 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1273 t
->encap_family
= ut
->family
;
1277 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1281 if (nr
> XFRM_MAX_DEPTH
)
1284 for (i
= 0; i
< nr
; i
++) {
1285 /* We never validated the ut->family value, so many
1286 * applications simply leave it at zero. The check was
1287 * never made and ut->family was ignored because all
1288 * templates could be assumed to have the same family as
1289 * the policy itself. Now that we will have ipv4-in-ipv6
1290 * and ipv6-in-ipv4 tunnels, this is no longer true.
1293 ut
[i
].family
= family
;
1295 switch (ut
[i
].family
) {
1298 #if IS_ENABLED(CONFIG_IPV6)
1310 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1312 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1317 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1318 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1321 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1325 copy_templates(pol
, utmpl
, nr
);
1330 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1332 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1333 struct xfrm_userpolicy_type
*upt
;
1334 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1342 err
= verify_policy_type(type
);
1350 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1352 xp
->priority
= p
->priority
;
1353 xp
->index
= p
->index
;
1354 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1355 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1356 xp
->action
= p
->action
;
1357 xp
->flags
= p
->flags
;
1358 xp
->family
= p
->sel
.family
;
1359 /* XXX xp->share = p->share; */
1362 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1364 memset(p
, 0, sizeof(*p
));
1365 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1366 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1367 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1368 p
->priority
= xp
->priority
;
1369 p
->index
= xp
->index
;
1370 p
->sel
.family
= xp
->family
;
1372 p
->action
= xp
->action
;
1373 p
->flags
= xp
->flags
;
1374 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1377 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1379 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1387 copy_from_user_policy(xp
, p
);
1389 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1393 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1394 err
= copy_from_user_sec_ctx(xp
, attrs
);
1398 xfrm_mark_get(attrs
, &xp
->mark
);
1404 xfrm_policy_destroy(xp
);
1408 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1409 struct nlattr
**attrs
)
1411 struct net
*net
= sock_net(skb
->sk
);
1412 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1413 struct xfrm_policy
*xp
;
1417 kuid_t loginuid
= audit_get_loginuid(current
);
1418 unsigned int sessionid
= audit_get_sessionid(current
);
1421 err
= verify_newpolicy_info(p
);
1424 err
= verify_sec_ctx_len(attrs
);
1428 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1432 /* shouldn't excl be based on nlh flags??
1433 * Aha! this is anti-netlink really i.e more pfkey derived
1434 * in netlink excl is a flag and you wouldnt need
1435 * a type XFRM_MSG_UPDPOLICY - JHS */
1436 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1437 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1438 security_task_getsecid(current
, &sid
);
1439 xfrm_audit_policy_add(xp
, err
? 0 : 1, loginuid
, sessionid
, sid
);
1442 security_xfrm_policy_free(xp
->security
);
1447 c
.event
= nlh
->nlmsg_type
;
1448 c
.seq
= nlh
->nlmsg_seq
;
1449 c
.portid
= nlh
->nlmsg_pid
;
1450 km_policy_notify(xp
, p
->dir
, &c
);
1457 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1459 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1462 if (xp
->xfrm_nr
== 0)
1465 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1466 struct xfrm_user_tmpl
*up
= &vec
[i
];
1467 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1469 memset(up
, 0, sizeof(*up
));
1470 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1471 up
->family
= kp
->encap_family
;
1472 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1473 up
->reqid
= kp
->reqid
;
1474 up
->mode
= kp
->mode
;
1475 up
->share
= kp
->share
;
1476 up
->optional
= kp
->optional
;
1477 up
->aalgos
= kp
->aalgos
;
1478 up
->ealgos
= kp
->ealgos
;
1479 up
->calgos
= kp
->calgos
;
1482 return nla_put(skb
, XFRMA_TMPL
,
1483 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1486 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1489 return copy_sec_ctx(x
->security
, skb
);
1494 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1497 return copy_sec_ctx(xp
->security
, skb
);
1500 static inline size_t userpolicy_type_attrsize(void)
1502 #ifdef CONFIG_XFRM_SUB_POLICY
1503 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1509 #ifdef CONFIG_XFRM_SUB_POLICY
1510 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1512 struct xfrm_userpolicy_type upt
= {
1516 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1520 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1526 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1528 struct xfrm_dump_info
*sp
= ptr
;
1529 struct xfrm_userpolicy_info
*p
;
1530 struct sk_buff
*in_skb
= sp
->in_skb
;
1531 struct sk_buff
*skb
= sp
->out_skb
;
1532 struct nlmsghdr
*nlh
;
1535 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
1536 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1540 p
= nlmsg_data(nlh
);
1541 copy_to_user_policy(xp
, p
, dir
);
1542 err
= copy_to_user_tmpl(xp
, skb
);
1544 err
= copy_to_user_sec_ctx(xp
, skb
);
1546 err
= copy_to_user_policy_type(xp
->type
, skb
);
1548 err
= xfrm_mark_put(skb
, &xp
->mark
);
1550 nlmsg_cancel(skb
, nlh
);
1553 nlmsg_end(skb
, nlh
);
1557 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1559 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1560 struct net
*net
= sock_net(cb
->skb
->sk
);
1562 xfrm_policy_walk_done(walk
, net
);
1566 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1568 struct net
*net
= sock_net(skb
->sk
);
1569 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1570 struct xfrm_dump_info info
;
1572 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk
) >
1573 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1575 info
.in_skb
= cb
->skb
;
1577 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1578 info
.nlmsg_flags
= NLM_F_MULTI
;
1582 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1585 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1590 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1591 struct xfrm_policy
*xp
,
1594 struct xfrm_dump_info info
;
1595 struct sk_buff
*skb
;
1598 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1600 return ERR_PTR(-ENOMEM
);
1602 info
.in_skb
= in_skb
;
1604 info
.nlmsg_seq
= seq
;
1605 info
.nlmsg_flags
= 0;
1607 err
= dump_one_policy(xp
, dir
, 0, &info
);
1610 return ERR_PTR(err
);
1616 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1617 struct nlattr
**attrs
)
1619 struct net
*net
= sock_net(skb
->sk
);
1620 struct xfrm_policy
*xp
;
1621 struct xfrm_userpolicy_id
*p
;
1622 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1627 u32 mark
= xfrm_mark_get(attrs
, &m
);
1629 p
= nlmsg_data(nlh
);
1630 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1632 err
= copy_from_user_policy_type(&type
, attrs
);
1636 err
= verify_policy_dir(p
->dir
);
1641 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, delete, &err
);
1643 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1644 struct xfrm_sec_ctx
*ctx
;
1646 err
= verify_sec_ctx_len(attrs
);
1652 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1654 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
1658 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
, &p
->sel
,
1660 security_xfrm_policy_free(ctx
);
1666 struct sk_buff
*resp_skb
;
1668 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1669 if (IS_ERR(resp_skb
)) {
1670 err
= PTR_ERR(resp_skb
);
1672 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
1673 NETLINK_CB(skb
).portid
);
1676 kuid_t loginuid
= audit_get_loginuid(current
);
1677 unsigned int sessionid
= audit_get_sessionid(current
);
1680 security_task_getsecid(current
, &sid
);
1681 xfrm_audit_policy_delete(xp
, err
? 0 : 1, loginuid
, sessionid
,
1687 c
.data
.byid
= p
->index
;
1688 c
.event
= nlh
->nlmsg_type
;
1689 c
.seq
= nlh
->nlmsg_seq
;
1690 c
.portid
= nlh
->nlmsg_pid
;
1691 km_policy_notify(xp
, p
->dir
, &c
);
1696 if (delete && err
== 0)
1697 xfrm_garbage_collect(net
);
1701 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1702 struct nlattr
**attrs
)
1704 struct net
*net
= sock_net(skb
->sk
);
1706 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1707 struct xfrm_audit audit_info
;
1710 audit_info
.loginuid
= audit_get_loginuid(current
);
1711 audit_info
.sessionid
= audit_get_sessionid(current
);
1712 security_task_getsecid(current
, &audit_info
.secid
);
1713 err
= xfrm_state_flush(net
, p
->proto
, &audit_info
);
1715 if (err
== -ESRCH
) /* empty table */
1719 c
.data
.proto
= p
->proto
;
1720 c
.event
= nlh
->nlmsg_type
;
1721 c
.seq
= nlh
->nlmsg_seq
;
1722 c
.portid
= nlh
->nlmsg_pid
;
1724 km_state_notify(NULL
, &c
);
1729 static inline size_t xfrm_aevent_msgsize(struct xfrm_state
*x
)
1731 size_t replay_size
= x
->replay_esn
?
1732 xfrm_replay_state_esn_len(x
->replay_esn
) :
1733 sizeof(struct xfrm_replay_state
);
1735 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
1736 + nla_total_size(replay_size
)
1737 + nla_total_size(sizeof(struct xfrm_lifetime_cur
))
1738 + nla_total_size(sizeof(struct xfrm_mark
))
1739 + nla_total_size(4) /* XFRM_AE_RTHR */
1740 + nla_total_size(4); /* XFRM_AE_ETHR */
1743 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
1745 struct xfrm_aevent_id
*id
;
1746 struct nlmsghdr
*nlh
;
1749 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1753 id
= nlmsg_data(nlh
);
1754 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
, sizeof(x
->id
.daddr
));
1755 id
->sa_id
.spi
= x
->id
.spi
;
1756 id
->sa_id
.family
= x
->props
.family
;
1757 id
->sa_id
.proto
= x
->id
.proto
;
1758 memcpy(&id
->saddr
, &x
->props
.saddr
, sizeof(x
->props
.saddr
));
1759 id
->reqid
= x
->props
.reqid
;
1760 id
->flags
= c
->data
.aevent
;
1762 if (x
->replay_esn
) {
1763 err
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
1764 xfrm_replay_state_esn_len(x
->replay_esn
),
1767 err
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
1772 err
= nla_put(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
);
1776 if (id
->flags
& XFRM_AE_RTHR
) {
1777 err
= nla_put_u32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
1781 if (id
->flags
& XFRM_AE_ETHR
) {
1782 err
= nla_put_u32(skb
, XFRMA_ETIMER_THRESH
,
1783 x
->replay_maxage
* 10 / HZ
);
1787 err
= xfrm_mark_put(skb
, &x
->mark
);
1791 return nlmsg_end(skb
, nlh
);
1794 nlmsg_cancel(skb
, nlh
);
1798 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1799 struct nlattr
**attrs
)
1801 struct net
*net
= sock_net(skb
->sk
);
1802 struct xfrm_state
*x
;
1803 struct sk_buff
*r_skb
;
1808 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1809 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1811 mark
= xfrm_mark_get(attrs
, &m
);
1813 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1817 r_skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
1818 if (r_skb
== NULL
) {
1824 * XXX: is this lock really needed - none of the other
1825 * gets lock (the concern is things getting updated
1826 * while we are still reading) - jhs
1828 spin_lock_bh(&x
->lock
);
1829 c
.data
.aevent
= p
->flags
;
1830 c
.seq
= nlh
->nlmsg_seq
;
1831 c
.portid
= nlh
->nlmsg_pid
;
1833 if (build_aevent(r_skb
, x
, &c
) < 0)
1835 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).portid
);
1836 spin_unlock_bh(&x
->lock
);
1841 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1842 struct nlattr
**attrs
)
1844 struct net
*net
= sock_net(skb
->sk
);
1845 struct xfrm_state
*x
;
1850 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1851 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
1852 struct nlattr
*re
= attrs
[XFRMA_REPLAY_ESN_VAL
];
1853 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
1855 if (!lt
&& !rp
&& !re
)
1858 /* pedantic mode - thou shalt sayeth replaceth */
1859 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1862 mark
= xfrm_mark_get(attrs
, &m
);
1864 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1868 if (x
->km
.state
!= XFRM_STATE_VALID
)
1871 err
= xfrm_replay_verify_len(x
->replay_esn
, re
);
1875 spin_lock_bh(&x
->lock
);
1876 xfrm_update_ae_params(x
, attrs
, 1);
1877 spin_unlock_bh(&x
->lock
);
1879 c
.event
= nlh
->nlmsg_type
;
1880 c
.seq
= nlh
->nlmsg_seq
;
1881 c
.portid
= nlh
->nlmsg_pid
;
1882 c
.data
.aevent
= XFRM_AE_CU
;
1883 km_state_notify(x
, &c
);
1890 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1891 struct nlattr
**attrs
)
1893 struct net
*net
= sock_net(skb
->sk
);
1895 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1897 struct xfrm_audit audit_info
;
1899 err
= copy_from_user_policy_type(&type
, attrs
);
1903 audit_info
.loginuid
= audit_get_loginuid(current
);
1904 audit_info
.sessionid
= audit_get_sessionid(current
);
1905 security_task_getsecid(current
, &audit_info
.secid
);
1906 err
= xfrm_policy_flush(net
, type
, &audit_info
);
1908 if (err
== -ESRCH
) /* empty table */
1914 c
.event
= nlh
->nlmsg_type
;
1915 c
.seq
= nlh
->nlmsg_seq
;
1916 c
.portid
= nlh
->nlmsg_pid
;
1918 km_policy_notify(NULL
, 0, &c
);
1922 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1923 struct nlattr
**attrs
)
1925 struct net
*net
= sock_net(skb
->sk
);
1926 struct xfrm_policy
*xp
;
1927 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
1928 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1929 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1932 u32 mark
= xfrm_mark_get(attrs
, &m
);
1934 err
= copy_from_user_policy_type(&type
, attrs
);
1938 err
= verify_policy_dir(p
->dir
);
1943 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, 0, &err
);
1945 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1946 struct xfrm_sec_ctx
*ctx
;
1948 err
= verify_sec_ctx_len(attrs
);
1954 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1956 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
1960 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
,
1961 &p
->sel
, ctx
, 0, &err
);
1962 security_xfrm_policy_free(ctx
);
1967 if (unlikely(xp
->walk
.dead
))
1972 kuid_t loginuid
= audit_get_loginuid(current
);
1973 unsigned int sessionid
= audit_get_sessionid(current
);
1976 security_task_getsecid(current
, &sid
);
1977 xfrm_policy_delete(xp
, p
->dir
);
1978 xfrm_audit_policy_delete(xp
, 1, loginuid
, sessionid
, sid
);
1981 // reset the timers here?
1982 WARN(1, "Dont know what to do with soft policy expire\n");
1984 km_policy_expired(xp
, p
->dir
, up
->hard
, nlh
->nlmsg_pid
);
1991 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1992 struct nlattr
**attrs
)
1994 struct net
*net
= sock_net(skb
->sk
);
1995 struct xfrm_state
*x
;
1997 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
1998 struct xfrm_usersa_info
*p
= &ue
->state
;
2000 u32 mark
= xfrm_mark_get(attrs
, &m
);
2002 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
2008 spin_lock_bh(&x
->lock
);
2010 if (x
->km
.state
!= XFRM_STATE_VALID
)
2012 km_state_expired(x
, ue
->hard
, nlh
->nlmsg_pid
);
2015 kuid_t loginuid
= audit_get_loginuid(current
);
2016 unsigned int sessionid
= audit_get_sessionid(current
);
2019 security_task_getsecid(current
, &sid
);
2020 __xfrm_state_delete(x
);
2021 xfrm_audit_state_delete(x
, 1, loginuid
, sessionid
, sid
);
2025 spin_unlock_bh(&x
->lock
);
2030 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2031 struct nlattr
**attrs
)
2033 struct net
*net
= sock_net(skb
->sk
);
2034 struct xfrm_policy
*xp
;
2035 struct xfrm_user_tmpl
*ut
;
2037 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
2038 struct xfrm_mark mark
;
2040 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
2041 struct xfrm_state
*x
= xfrm_state_alloc(net
);
2047 xfrm_mark_get(attrs
, &mark
);
2049 err
= verify_newpolicy_info(&ua
->policy
);
2054 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
2058 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
2059 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
2060 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
2061 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
2062 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
2064 /* extract the templates and for each call km_key */
2065 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
2066 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
2067 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
2068 x
->props
.mode
= t
->mode
;
2069 x
->props
.reqid
= t
->reqid
;
2070 x
->props
.family
= ut
->family
;
2071 t
->aalgos
= ua
->aalgos
;
2072 t
->ealgos
= ua
->ealgos
;
2073 t
->calgos
= ua
->calgos
;
2074 err
= km_query(x
, t
, xp
);
2084 WARN(1, "BAD policy passed\n");
2091 #ifdef CONFIG_XFRM_MIGRATE
2092 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
2093 struct xfrm_kmaddress
*k
,
2094 struct nlattr
**attrs
, int *num
)
2096 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
2097 struct xfrm_user_migrate
*um
;
2101 struct xfrm_user_kmaddress
*uk
;
2103 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
2104 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
2105 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
2106 k
->family
= uk
->family
;
2107 k
->reserved
= uk
->reserved
;
2111 num_migrate
= nla_len(rt
) / sizeof(*um
);
2113 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
2116 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
2117 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
2118 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
2119 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
2120 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
2122 ma
->proto
= um
->proto
;
2123 ma
->mode
= um
->mode
;
2124 ma
->reqid
= um
->reqid
;
2126 ma
->old_family
= um
->old_family
;
2127 ma
->new_family
= um
->new_family
;
2134 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2135 struct nlattr
**attrs
)
2137 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
2138 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
2139 struct xfrm_kmaddress km
, *kmp
;
2143 struct net
*net
= sock_net(skb
->sk
);
2145 if (attrs
[XFRMA_MIGRATE
] == NULL
)
2148 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
2150 err
= copy_from_user_policy_type(&type
, attrs
);
2154 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
2161 xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
, net
);
2166 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2167 struct nlattr
**attrs
)
2169 return -ENOPROTOOPT
;
2173 #ifdef CONFIG_XFRM_MIGRATE
2174 static int copy_to_user_migrate(const struct xfrm_migrate
*m
, struct sk_buff
*skb
)
2176 struct xfrm_user_migrate um
;
2178 memset(&um
, 0, sizeof(um
));
2179 um
.proto
= m
->proto
;
2181 um
.reqid
= m
->reqid
;
2182 um
.old_family
= m
->old_family
;
2183 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
2184 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
2185 um
.new_family
= m
->new_family
;
2186 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
2187 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
2189 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
2192 static int copy_to_user_kmaddress(const struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
2194 struct xfrm_user_kmaddress uk
;
2196 memset(&uk
, 0, sizeof(uk
));
2197 uk
.family
= k
->family
;
2198 uk
.reserved
= k
->reserved
;
2199 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
2200 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
2202 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2205 static inline size_t xfrm_migrate_msgsize(int num_migrate
, int with_kma
)
2207 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2208 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2209 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2210 + userpolicy_type_attrsize();
2213 static int build_migrate(struct sk_buff
*skb
, const struct xfrm_migrate
*m
,
2214 int num_migrate
, const struct xfrm_kmaddress
*k
,
2215 const struct xfrm_selector
*sel
, u8 dir
, u8 type
)
2217 const struct xfrm_migrate
*mp
;
2218 struct xfrm_userpolicy_id
*pol_id
;
2219 struct nlmsghdr
*nlh
;
2222 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2226 pol_id
= nlmsg_data(nlh
);
2227 /* copy data from selector, dir, and type to the pol_id */
2228 memset(pol_id
, 0, sizeof(*pol_id
));
2229 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2233 err
= copy_to_user_kmaddress(k
, skb
);
2237 err
= copy_to_user_policy_type(type
, skb
);
2240 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2241 err
= copy_to_user_migrate(mp
, skb
);
2246 return nlmsg_end(skb
, nlh
);
2249 nlmsg_cancel(skb
, nlh
);
2253 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2254 const struct xfrm_migrate
*m
, int num_migrate
,
2255 const struct xfrm_kmaddress
*k
)
2257 struct net
*net
= &init_net
;
2258 struct sk_buff
*skb
;
2260 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
), GFP_ATOMIC
);
2265 if (build_migrate(skb
, m
, num_migrate
, k
, sel
, dir
, type
) < 0)
2268 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MIGRATE
, GFP_ATOMIC
);
2271 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2272 const struct xfrm_migrate
*m
, int num_migrate
,
2273 const struct xfrm_kmaddress
*k
)
2275 return -ENOPROTOOPT
;
2279 #define XMSGSIZE(type) sizeof(struct type)
2281 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2282 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2283 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2284 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2285 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2286 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2287 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2288 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2289 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2290 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2291 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2292 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2293 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2294 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2295 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2296 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2297 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2298 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2299 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2300 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2301 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2306 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2307 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2308 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2309 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2310 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2311 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2312 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2313 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2314 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2315 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2316 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2317 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2318 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2319 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2320 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2321 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2322 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2323 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2324 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2325 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2326 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2327 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2328 [XFRMA_TFCPAD
] = { .type
= NLA_U32
},
2329 [XFRMA_REPLAY_ESN_VAL
] = { .len
= sizeof(struct xfrm_replay_state_esn
) },
2330 [XFRMA_SA_EXTRA_FLAGS
] = { .type
= NLA_U32
},
2331 [XFRMA_PROTO
] = { .type
= NLA_U8
},
2332 [XFRMA_ADDRESS_FILTER
] = { .len
= sizeof(struct xfrm_address_filter
) },
2335 static const struct xfrm_link
{
2336 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2337 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2338 int (*done
)(struct netlink_callback
*);
2339 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2340 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2341 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2342 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2343 .dump
= xfrm_dump_sa
,
2344 .done
= xfrm_dump_sa_done
},
2345 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2346 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2347 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2348 .dump
= xfrm_dump_policy
,
2349 .done
= xfrm_dump_policy_done
},
2350 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2351 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2352 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2353 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2354 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2355 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2356 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2357 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2358 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2359 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2360 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2361 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2362 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2365 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2367 struct net
*net
= sock_net(skb
->sk
);
2368 struct nlattr
*attrs
[XFRMA_MAX
+1];
2369 const struct xfrm_link
*link
;
2372 type
= nlh
->nlmsg_type
;
2373 if (type
> XFRM_MSG_MAX
)
2376 type
-= XFRM_MSG_BASE
;
2377 link
= &xfrm_dispatch
[type
];
2379 /* All operations require privileges, even GET */
2380 if (!netlink_net_capable(skb
, CAP_NET_ADMIN
))
2383 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2384 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2385 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2386 if (link
->dump
== NULL
)
2390 struct netlink_dump_control c
= {
2394 return netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, &c
);
2398 err
= nlmsg_parse(nlh
, xfrm_msg_min
[type
], attrs
, XFRMA_MAX
,
2403 if (link
->doit
== NULL
)
2406 return link
->doit(skb
, nlh
, attrs
);
2409 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2411 struct net
*net
= sock_net(skb
->sk
);
2413 mutex_lock(&net
->xfrm
.xfrm_cfg_mutex
);
2414 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2415 mutex_unlock(&net
->xfrm
.xfrm_cfg_mutex
);
2418 static inline size_t xfrm_expire_msgsize(void)
2420 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2421 + nla_total_size(sizeof(struct xfrm_mark
));
2424 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
2426 struct xfrm_user_expire
*ue
;
2427 struct nlmsghdr
*nlh
;
2430 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2434 ue
= nlmsg_data(nlh
);
2435 copy_to_user_state(x
, &ue
->state
);
2436 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2438 err
= xfrm_mark_put(skb
, &x
->mark
);
2442 return nlmsg_end(skb
, nlh
);
2445 static int xfrm_exp_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2447 struct net
*net
= xs_net(x
);
2448 struct sk_buff
*skb
;
2450 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2454 if (build_expire(skb
, x
, c
) < 0) {
2459 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2462 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2464 struct net
*net
= xs_net(x
);
2465 struct sk_buff
*skb
;
2467 skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
2471 if (build_aevent(skb
, x
, c
) < 0)
2474 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
2477 static int xfrm_notify_sa_flush(const struct km_event
*c
)
2479 struct net
*net
= c
->net
;
2480 struct xfrm_usersa_flush
*p
;
2481 struct nlmsghdr
*nlh
;
2482 struct sk_buff
*skb
;
2483 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2485 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2489 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2495 p
= nlmsg_data(nlh
);
2496 p
->proto
= c
->data
.proto
;
2498 nlmsg_end(skb
, nlh
);
2500 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2503 static inline size_t xfrm_sa_len(struct xfrm_state
*x
)
2507 l
+= nla_total_size(aead_len(x
->aead
));
2509 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2510 (x
->aalg
->alg_key_len
+ 7) / 8);
2511 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2514 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
2516 l
+= nla_total_size(sizeof(*x
->calg
));
2518 l
+= nla_total_size(sizeof(*x
->encap
));
2520 l
+= nla_total_size(sizeof(x
->tfcpad
));
2522 l
+= nla_total_size(xfrm_replay_state_esn_len(x
->replay_esn
));
2524 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
2525 x
->security
->ctx_len
);
2527 l
+= nla_total_size(sizeof(*x
->coaddr
));
2528 if (x
->props
.extra_flags
)
2529 l
+= nla_total_size(sizeof(x
->props
.extra_flags
));
2531 /* Must count x->lastused as it may become non-zero behind our back. */
2532 l
+= nla_total_size(sizeof(u64
));
2537 static int xfrm_notify_sa(struct xfrm_state
*x
, const struct km_event
*c
)
2539 struct net
*net
= xs_net(x
);
2540 struct xfrm_usersa_info
*p
;
2541 struct xfrm_usersa_id
*id
;
2542 struct nlmsghdr
*nlh
;
2543 struct sk_buff
*skb
;
2544 int len
= xfrm_sa_len(x
);
2547 headlen
= sizeof(*p
);
2548 if (c
->event
== XFRM_MSG_DELSA
) {
2549 len
+= nla_total_size(headlen
);
2550 headlen
= sizeof(*id
);
2551 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2553 len
+= NLMSG_ALIGN(headlen
);
2555 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2559 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
2564 p
= nlmsg_data(nlh
);
2565 if (c
->event
== XFRM_MSG_DELSA
) {
2566 struct nlattr
*attr
;
2568 id
= nlmsg_data(nlh
);
2569 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2570 id
->spi
= x
->id
.spi
;
2571 id
->family
= x
->props
.family
;
2572 id
->proto
= x
->id
.proto
;
2574 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
2581 err
= copy_to_user_state_extra(x
, p
, skb
);
2585 nlmsg_end(skb
, nlh
);
2587 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2594 static int xfrm_send_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2598 case XFRM_MSG_EXPIRE
:
2599 return xfrm_exp_state_notify(x
, c
);
2600 case XFRM_MSG_NEWAE
:
2601 return xfrm_aevent_state_notify(x
, c
);
2602 case XFRM_MSG_DELSA
:
2603 case XFRM_MSG_UPDSA
:
2604 case XFRM_MSG_NEWSA
:
2605 return xfrm_notify_sa(x
, c
);
2606 case XFRM_MSG_FLUSHSA
:
2607 return xfrm_notify_sa_flush(c
);
2609 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
2618 static inline size_t xfrm_acquire_msgsize(struct xfrm_state
*x
,
2619 struct xfrm_policy
*xp
)
2621 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
2622 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2623 + nla_total_size(sizeof(struct xfrm_mark
))
2624 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
2625 + userpolicy_type_attrsize();
2628 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2629 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
)
2631 __u32 seq
= xfrm_get_acqseq();
2632 struct xfrm_user_acquire
*ua
;
2633 struct nlmsghdr
*nlh
;
2636 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2640 ua
= nlmsg_data(nlh
);
2641 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2642 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2643 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2644 copy_to_user_policy(xp
, &ua
->policy
, XFRM_POLICY_OUT
);
2645 ua
->aalgos
= xt
->aalgos
;
2646 ua
->ealgos
= xt
->ealgos
;
2647 ua
->calgos
= xt
->calgos
;
2648 ua
->seq
= x
->km
.seq
= seq
;
2650 err
= copy_to_user_tmpl(xp
, skb
);
2652 err
= copy_to_user_state_sec_ctx(x
, skb
);
2654 err
= copy_to_user_policy_type(xp
->type
, skb
);
2656 err
= xfrm_mark_put(skb
, &xp
->mark
);
2658 nlmsg_cancel(skb
, nlh
);
2662 return nlmsg_end(skb
, nlh
);
2665 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2666 struct xfrm_policy
*xp
)
2668 struct net
*net
= xs_net(x
);
2669 struct sk_buff
*skb
;
2671 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
2675 if (build_acquire(skb
, x
, xt
, xp
) < 0)
2678 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
2681 /* User gives us xfrm_user_policy_info followed by an array of 0
2682 * or more templates.
2684 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2685 u8
*data
, int len
, int *dir
)
2687 struct net
*net
= sock_net(sk
);
2688 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2689 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2690 struct xfrm_policy
*xp
;
2693 switch (sk
->sk_family
) {
2695 if (opt
!= IP_XFRM_POLICY
) {
2700 #if IS_ENABLED(CONFIG_IPV6)
2702 if (opt
!= IPV6_XFRM_POLICY
) {
2715 if (len
< sizeof(*p
) ||
2716 verify_newpolicy_info(p
))
2719 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2720 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2723 if (p
->dir
> XFRM_POLICY_OUT
)
2726 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
2732 copy_from_user_policy(xp
, p
);
2733 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2734 copy_templates(xp
, ut
, nr
);
2741 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
2743 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
2744 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2745 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
2746 + nla_total_size(sizeof(struct xfrm_mark
))
2747 + userpolicy_type_attrsize();
2750 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2751 int dir
, const struct km_event
*c
)
2753 struct xfrm_user_polexpire
*upe
;
2754 int hard
= c
->data
.hard
;
2755 struct nlmsghdr
*nlh
;
2758 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2762 upe
= nlmsg_data(nlh
);
2763 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2764 err
= copy_to_user_tmpl(xp
, skb
);
2766 err
= copy_to_user_sec_ctx(xp
, skb
);
2768 err
= copy_to_user_policy_type(xp
->type
, skb
);
2770 err
= xfrm_mark_put(skb
, &xp
->mark
);
2772 nlmsg_cancel(skb
, nlh
);
2777 return nlmsg_end(skb
, nlh
);
2780 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2782 struct net
*net
= xp_net(xp
);
2783 struct sk_buff
*skb
;
2785 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
2789 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2792 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2795 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2797 int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2798 struct net
*net
= xp_net(xp
);
2799 struct xfrm_userpolicy_info
*p
;
2800 struct xfrm_userpolicy_id
*id
;
2801 struct nlmsghdr
*nlh
;
2802 struct sk_buff
*skb
;
2805 headlen
= sizeof(*p
);
2806 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2807 len
+= nla_total_size(headlen
);
2808 headlen
= sizeof(*id
);
2810 len
+= userpolicy_type_attrsize();
2811 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2812 len
+= NLMSG_ALIGN(headlen
);
2814 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2818 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
2823 p
= nlmsg_data(nlh
);
2824 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2825 struct nlattr
*attr
;
2827 id
= nlmsg_data(nlh
);
2828 memset(id
, 0, sizeof(*id
));
2831 id
->index
= xp
->index
;
2833 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2835 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
2843 copy_to_user_policy(xp
, p
, dir
);
2844 err
= copy_to_user_tmpl(xp
, skb
);
2846 err
= copy_to_user_policy_type(xp
->type
, skb
);
2848 err
= xfrm_mark_put(skb
, &xp
->mark
);
2852 nlmsg_end(skb
, nlh
);
2854 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2861 static int xfrm_notify_policy_flush(const struct km_event
*c
)
2863 struct net
*net
= c
->net
;
2864 struct nlmsghdr
*nlh
;
2865 struct sk_buff
*skb
;
2868 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
2872 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
2876 err
= copy_to_user_policy_type(c
->data
.type
, skb
);
2880 nlmsg_end(skb
, nlh
);
2882 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2889 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2893 case XFRM_MSG_NEWPOLICY
:
2894 case XFRM_MSG_UPDPOLICY
:
2895 case XFRM_MSG_DELPOLICY
:
2896 return xfrm_notify_policy(xp
, dir
, c
);
2897 case XFRM_MSG_FLUSHPOLICY
:
2898 return xfrm_notify_policy_flush(c
);
2899 case XFRM_MSG_POLEXPIRE
:
2900 return xfrm_exp_policy_notify(xp
, dir
, c
);
2902 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
2910 static inline size_t xfrm_report_msgsize(void)
2912 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
2915 static int build_report(struct sk_buff
*skb
, u8 proto
,
2916 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2918 struct xfrm_user_report
*ur
;
2919 struct nlmsghdr
*nlh
;
2921 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
2925 ur
= nlmsg_data(nlh
);
2927 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2930 int err
= nla_put(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2932 nlmsg_cancel(skb
, nlh
);
2936 return nlmsg_end(skb
, nlh
);
2939 static int xfrm_send_report(struct net
*net
, u8 proto
,
2940 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2942 struct sk_buff
*skb
;
2944 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
2948 if (build_report(skb
, proto
, sel
, addr
) < 0)
2951 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2954 static inline size_t xfrm_mapping_msgsize(void)
2956 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
2959 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
2960 xfrm_address_t
*new_saddr
, __be16 new_sport
)
2962 struct xfrm_user_mapping
*um
;
2963 struct nlmsghdr
*nlh
;
2965 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
2969 um
= nlmsg_data(nlh
);
2971 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
2972 um
->id
.spi
= x
->id
.spi
;
2973 um
->id
.family
= x
->props
.family
;
2974 um
->id
.proto
= x
->id
.proto
;
2975 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
2976 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
2977 um
->new_sport
= new_sport
;
2978 um
->old_sport
= x
->encap
->encap_sport
;
2979 um
->reqid
= x
->props
.reqid
;
2981 return nlmsg_end(skb
, nlh
);
2984 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
2987 struct net
*net
= xs_net(x
);
2988 struct sk_buff
*skb
;
2990 if (x
->id
.proto
!= IPPROTO_ESP
)
2996 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
3000 if (build_mapping(skb
, x
, ipaddr
, sport
) < 0)
3003 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MAPPING
, GFP_ATOMIC
);
3006 static bool xfrm_is_alive(const struct km_event
*c
)
3008 return (bool)xfrm_acquire_is_on(c
->net
);
3011 static struct xfrm_mgr netlink_mgr
= {
3013 .notify
= xfrm_send_state_notify
,
3014 .acquire
= xfrm_send_acquire
,
3015 .compile_policy
= xfrm_compile_policy
,
3016 .notify_policy
= xfrm_send_policy_notify
,
3017 .report
= xfrm_send_report
,
3018 .migrate
= xfrm_send_migrate
,
3019 .new_mapping
= xfrm_send_mapping
,
3020 .is_alive
= xfrm_is_alive
,
3023 static int __net_init
xfrm_user_net_init(struct net
*net
)
3026 struct netlink_kernel_cfg cfg
= {
3027 .groups
= XFRMNLGRP_MAX
,
3028 .input
= xfrm_netlink_rcv
,
3031 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, &cfg
);
3034 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
3035 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
3039 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
3042 list_for_each_entry(net
, net_exit_list
, exit_list
)
3043 RCU_INIT_POINTER(net
->xfrm
.nlsk
, NULL
);
3045 list_for_each_entry(net
, net_exit_list
, exit_list
)
3046 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
3049 static struct pernet_operations xfrm_user_net_ops
= {
3050 .init
= xfrm_user_net_init
,
3051 .exit_batch
= xfrm_user_net_exit
,
3054 static int __init
xfrm_user_init(void)
3058 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
3060 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
3063 rv
= xfrm_register_km(&netlink_mgr
);
3065 unregister_pernet_subsys(&xfrm_user_net_ops
);
3069 static void __exit
xfrm_user_exit(void)
3071 xfrm_unregister_km(&netlink_mgr
);
3072 unregister_pernet_subsys(&xfrm_user_net_ops
);
3075 module_init(xfrm_user_init
);
3076 module_exit(xfrm_user_exit
);
3077 MODULE_LICENSE("GPL");
3078 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);