1 /* xfrm_user.c: User interface to configure xfrm engine.
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/slab.h>
18 #include <linux/socket.h>
19 #include <linux/string.h>
20 #include <linux/net.h>
21 #include <linux/skbuff.h>
22 #include <linux/pfkeyv2.h>
23 #include <linux/ipsec.h>
24 #include <linux/init.h>
25 #include <linux/security.h>
28 #include <net/netlink.h>
30 #include <linux/uaccess.h>
31 #if IS_ENABLED(CONFIG_IPV6)
32 #include <linux/in6.h>
34 #include <asm/unaligned.h>
36 static int verify_one_alg(struct nlattr
**attrs
, enum xfrm_attr_type_t type
)
38 struct nlattr
*rt
= attrs
[type
];
39 struct xfrm_algo
*algp
;
45 if (nla_len(rt
) < xfrm_alg_len(algp
))
58 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
62 static int verify_auth_trunc(struct nlattr
**attrs
)
64 struct nlattr
*rt
= attrs
[XFRMA_ALG_AUTH_TRUNC
];
65 struct xfrm_algo_auth
*algp
;
71 if (nla_len(rt
) < xfrm_alg_auth_len(algp
))
74 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
78 static int verify_aead(struct nlattr
**attrs
)
80 struct nlattr
*rt
= attrs
[XFRMA_ALG_AEAD
];
81 struct xfrm_algo_aead
*algp
;
87 if (nla_len(rt
) < aead_len(algp
))
90 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
94 static void verify_one_addr(struct nlattr
**attrs
, enum xfrm_attr_type_t type
,
95 xfrm_address_t
**addrp
)
97 struct nlattr
*rt
= attrs
[type
];
100 *addrp
= nla_data(rt
);
103 static inline int verify_sec_ctx_len(struct nlattr
**attrs
)
105 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
106 struct xfrm_user_sec_ctx
*uctx
;
112 if (uctx
->len
!= (sizeof(struct xfrm_user_sec_ctx
) + uctx
->ctx_len
))
118 static inline int verify_replay(struct xfrm_usersa_info
*p
,
119 struct nlattr
**attrs
)
121 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_ESN_VAL
];
122 struct xfrm_replay_state_esn
*rs
;
124 if (p
->flags
& XFRM_STATE_ESN
) {
130 if (rs
->bmp_len
> XFRMA_REPLAY_ESN_MAX
/ sizeof(rs
->bmp
[0]) / 8)
133 if (nla_len(rt
) < xfrm_replay_state_esn_len(rs
) &&
134 nla_len(rt
) != sizeof(*rs
))
141 /* As only ESP and AH support ESN feature. */
142 if ((p
->id
.proto
!= IPPROTO_ESP
) && (p
->id
.proto
!= IPPROTO_AH
))
145 if (p
->replay_window
!= 0)
151 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
152 struct nlattr
**attrs
)
162 #if IS_ENABLED(CONFIG_IPV6)
174 switch (p
->id
.proto
) {
176 if ((!attrs
[XFRMA_ALG_AUTH
] &&
177 !attrs
[XFRMA_ALG_AUTH_TRUNC
]) ||
178 attrs
[XFRMA_ALG_AEAD
] ||
179 attrs
[XFRMA_ALG_CRYPT
] ||
180 attrs
[XFRMA_ALG_COMP
] ||
186 if (attrs
[XFRMA_ALG_COMP
])
188 if (!attrs
[XFRMA_ALG_AUTH
] &&
189 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
190 !attrs
[XFRMA_ALG_CRYPT
] &&
191 !attrs
[XFRMA_ALG_AEAD
])
193 if ((attrs
[XFRMA_ALG_AUTH
] ||
194 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
195 attrs
[XFRMA_ALG_CRYPT
]) &&
196 attrs
[XFRMA_ALG_AEAD
])
198 if (attrs
[XFRMA_TFCPAD
] &&
199 p
->mode
!= XFRM_MODE_TUNNEL
)
204 if (!attrs
[XFRMA_ALG_COMP
] ||
205 attrs
[XFRMA_ALG_AEAD
] ||
206 attrs
[XFRMA_ALG_AUTH
] ||
207 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
208 attrs
[XFRMA_ALG_CRYPT
] ||
209 attrs
[XFRMA_TFCPAD
] ||
210 (ntohl(p
->id
.spi
) >= 0x10000))
214 #if IS_ENABLED(CONFIG_IPV6)
215 case IPPROTO_DSTOPTS
:
216 case IPPROTO_ROUTING
:
217 if (attrs
[XFRMA_ALG_COMP
] ||
218 attrs
[XFRMA_ALG_AUTH
] ||
219 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
220 attrs
[XFRMA_ALG_AEAD
] ||
221 attrs
[XFRMA_ALG_CRYPT
] ||
222 attrs
[XFRMA_ENCAP
] ||
223 attrs
[XFRMA_SEC_CTX
] ||
224 attrs
[XFRMA_TFCPAD
] ||
225 !attrs
[XFRMA_COADDR
])
234 if ((err
= verify_aead(attrs
)))
236 if ((err
= verify_auth_trunc(attrs
)))
238 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_AUTH
)))
240 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_CRYPT
)))
242 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_COMP
)))
244 if ((err
= verify_sec_ctx_len(attrs
)))
246 if ((err
= verify_replay(p
, attrs
)))
251 case XFRM_MODE_TRANSPORT
:
252 case XFRM_MODE_TUNNEL
:
253 case XFRM_MODE_ROUTEOPTIMIZATION
:
267 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
268 struct xfrm_algo_desc
*(*get_byname
)(const char *, int),
271 struct xfrm_algo
*p
, *ualg
;
272 struct xfrm_algo_desc
*algo
;
277 ualg
= nla_data(rta
);
279 algo
= get_byname(ualg
->alg_name
, 1);
282 *props
= algo
->desc
.sadb_alg_id
;
284 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
288 strcpy(p
->alg_name
, algo
->name
);
293 static int attach_crypt(struct xfrm_state
*x
, struct nlattr
*rta
)
295 struct xfrm_algo
*p
, *ualg
;
296 struct xfrm_algo_desc
*algo
;
301 ualg
= nla_data(rta
);
303 algo
= xfrm_ealg_get_byname(ualg
->alg_name
, 1);
306 x
->props
.ealgo
= algo
->desc
.sadb_alg_id
;
308 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
312 strcpy(p
->alg_name
, algo
->name
);
314 x
->geniv
= algo
->uinfo
.encr
.geniv
;
318 static int attach_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
321 struct xfrm_algo
*ualg
;
322 struct xfrm_algo_auth
*p
;
323 struct xfrm_algo_desc
*algo
;
328 ualg
= nla_data(rta
);
330 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
333 *props
= algo
->desc
.sadb_alg_id
;
335 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
339 strcpy(p
->alg_name
, algo
->name
);
340 p
->alg_key_len
= ualg
->alg_key_len
;
341 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
342 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
348 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
351 struct xfrm_algo_auth
*p
, *ualg
;
352 struct xfrm_algo_desc
*algo
;
357 ualg
= nla_data(rta
);
359 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
362 if (ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
364 *props
= algo
->desc
.sadb_alg_id
;
366 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
370 strcpy(p
->alg_name
, algo
->name
);
371 if (!p
->alg_trunc_len
)
372 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
378 static int attach_aead(struct xfrm_state
*x
, struct nlattr
*rta
)
380 struct xfrm_algo_aead
*p
, *ualg
;
381 struct xfrm_algo_desc
*algo
;
386 ualg
= nla_data(rta
);
388 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
391 x
->props
.ealgo
= algo
->desc
.sadb_alg_id
;
393 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
397 strcpy(p
->alg_name
, algo
->name
);
399 x
->geniv
= algo
->uinfo
.aead
.geniv
;
403 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn
*replay_esn
,
406 struct xfrm_replay_state_esn
*up
;
409 if (!replay_esn
|| !rp
)
413 ulen
= xfrm_replay_state_esn_len(up
);
415 /* Check the overall length and the internal bitmap length to avoid
416 * potential overflow. */
417 if (nla_len(rp
) < ulen
||
418 xfrm_replay_state_esn_len(replay_esn
) != ulen
||
419 replay_esn
->bmp_len
!= up
->bmp_len
)
422 if (up
->replay_window
> up
->bmp_len
* sizeof(__u32
) * 8)
428 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn
**replay_esn
,
429 struct xfrm_replay_state_esn
**preplay_esn
,
432 struct xfrm_replay_state_esn
*p
, *pp
, *up
;
439 klen
= xfrm_replay_state_esn_len(up
);
440 ulen
= nla_len(rta
) >= klen
? klen
: sizeof(*up
);
442 p
= kzalloc(klen
, GFP_KERNEL
);
446 pp
= kzalloc(klen
, GFP_KERNEL
);
453 memcpy(pp
, up
, ulen
);
461 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
466 len
+= sizeof(struct xfrm_user_sec_ctx
);
467 len
+= xfrm_ctx
->ctx_len
;
472 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
474 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
475 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
476 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
477 x
->props
.mode
= p
->mode
;
478 x
->props
.replay_window
= min_t(unsigned int, p
->replay_window
,
479 sizeof(x
->replay
.bitmap
) * 8);
480 x
->props
.reqid
= p
->reqid
;
481 x
->props
.family
= p
->family
;
482 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
483 x
->props
.flags
= p
->flags
;
485 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
486 x
->sel
.family
= p
->family
;
490 * someday when pfkey also has support, we could have the code
491 * somehow made shareable and move it to xfrm_state.c - JHS
494 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
,
497 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
498 struct nlattr
*re
= update_esn
? attrs
[XFRMA_REPLAY_ESN_VAL
] : NULL
;
499 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
500 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
501 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
504 struct xfrm_replay_state_esn
*replay_esn
;
505 replay_esn
= nla_data(re
);
506 memcpy(x
->replay_esn
, replay_esn
,
507 xfrm_replay_state_esn_len(replay_esn
));
508 memcpy(x
->preplay_esn
, replay_esn
,
509 xfrm_replay_state_esn_len(replay_esn
));
513 struct xfrm_replay_state
*replay
;
514 replay
= nla_data(rp
);
515 memcpy(&x
->replay
, replay
, sizeof(*replay
));
516 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
520 struct xfrm_lifetime_cur
*ltime
;
521 ltime
= nla_data(lt
);
522 x
->curlft
.bytes
= ltime
->bytes
;
523 x
->curlft
.packets
= ltime
->packets
;
524 x
->curlft
.add_time
= ltime
->add_time
;
525 x
->curlft
.use_time
= ltime
->use_time
;
529 x
->replay_maxage
= nla_get_u32(et
);
532 x
->replay_maxdiff
= nla_get_u32(rt
);
535 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
536 struct xfrm_usersa_info
*p
,
537 struct nlattr
**attrs
,
540 struct xfrm_state
*x
= xfrm_state_alloc(net
);
546 copy_from_user_state(x
, p
);
548 if (attrs
[XFRMA_SA_EXTRA_FLAGS
])
549 x
->props
.extra_flags
= nla_get_u32(attrs
[XFRMA_SA_EXTRA_FLAGS
]);
551 if ((err
= attach_aead(x
, attrs
[XFRMA_ALG_AEAD
])))
553 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
554 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
556 if (!x
->props
.aalgo
) {
557 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
558 attrs
[XFRMA_ALG_AUTH
])))
561 if ((err
= attach_crypt(x
, attrs
[XFRMA_ALG_CRYPT
])))
563 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
564 xfrm_calg_get_byname
,
565 attrs
[XFRMA_ALG_COMP
])))
568 if (attrs
[XFRMA_ENCAP
]) {
569 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
570 sizeof(*x
->encap
), GFP_KERNEL
);
571 if (x
->encap
== NULL
)
575 if (attrs
[XFRMA_TFCPAD
])
576 x
->tfcpad
= nla_get_u32(attrs
[XFRMA_TFCPAD
]);
578 if (attrs
[XFRMA_COADDR
]) {
579 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
580 sizeof(*x
->coaddr
), GFP_KERNEL
);
581 if (x
->coaddr
== NULL
)
585 xfrm_mark_get(attrs
, &x
->mark
);
587 err
= __xfrm_init_state(x
, false);
591 if (attrs
[XFRMA_SEC_CTX
]) {
592 err
= security_xfrm_state_alloc(x
,
593 nla_data(attrs
[XFRMA_SEC_CTX
]));
598 if ((err
= xfrm_alloc_replay_state_esn(&x
->replay_esn
, &x
->preplay_esn
,
599 attrs
[XFRMA_REPLAY_ESN_VAL
])))
603 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
604 /* sysctl_xfrm_aevent_etime is in 100ms units */
605 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
607 if ((err
= xfrm_init_replay(x
)))
610 /* override default values from above */
611 xfrm_update_ae_params(x
, attrs
, 0);
616 x
->km
.state
= XFRM_STATE_DEAD
;
623 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
624 struct nlattr
**attrs
)
626 struct net
*net
= sock_net(skb
->sk
);
627 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
628 struct xfrm_state
*x
;
632 err
= verify_newsa_info(p
, attrs
);
636 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
641 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
642 err
= xfrm_state_add(x
);
644 err
= xfrm_state_update(x
);
646 xfrm_audit_state_add(x
, err
? 0 : 1, true);
649 x
->km
.state
= XFRM_STATE_DEAD
;
654 c
.seq
= nlh
->nlmsg_seq
;
655 c
.portid
= nlh
->nlmsg_pid
;
656 c
.event
= nlh
->nlmsg_type
;
658 km_state_notify(x
, &c
);
664 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
665 struct xfrm_usersa_id
*p
,
666 struct nlattr
**attrs
,
669 struct xfrm_state
*x
= NULL
;
672 u32 mark
= xfrm_mark_get(attrs
, &m
);
674 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
676 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
678 xfrm_address_t
*saddr
= NULL
;
680 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
687 x
= xfrm_state_lookup_byaddr(net
, mark
,
689 p
->proto
, p
->family
);
698 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
699 struct nlattr
**attrs
)
701 struct net
*net
= sock_net(skb
->sk
);
702 struct xfrm_state
*x
;
705 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
707 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
711 if ((err
= security_xfrm_state_delete(x
)) != 0)
714 if (xfrm_state_kern(x
)) {
719 err
= xfrm_state_delete(x
);
724 c
.seq
= nlh
->nlmsg_seq
;
725 c
.portid
= nlh
->nlmsg_pid
;
726 c
.event
= nlh
->nlmsg_type
;
727 km_state_notify(x
, &c
);
730 xfrm_audit_state_delete(x
, err
? 0 : 1, true);
735 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
737 memset(p
, 0, sizeof(*p
));
738 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
739 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
740 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
741 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
742 put_unaligned(x
->stats
.replay_window
, &p
->stats
.replay_window
);
743 put_unaligned(x
->stats
.replay
, &p
->stats
.replay
);
744 put_unaligned(x
->stats
.integrity_failed
, &p
->stats
.integrity_failed
);
745 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
746 p
->mode
= x
->props
.mode
;
747 p
->replay_window
= x
->props
.replay_window
;
748 p
->reqid
= x
->props
.reqid
;
749 p
->family
= x
->props
.family
;
750 p
->flags
= x
->props
.flags
;
754 struct xfrm_dump_info
{
755 struct sk_buff
*in_skb
;
756 struct sk_buff
*out_skb
;
761 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
763 struct xfrm_user_sec_ctx
*uctx
;
765 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
767 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
771 uctx
= nla_data(attr
);
772 uctx
->exttype
= XFRMA_SEC_CTX
;
773 uctx
->len
= ctx_size
;
774 uctx
->ctx_doi
= s
->ctx_doi
;
775 uctx
->ctx_alg
= s
->ctx_alg
;
776 uctx
->ctx_len
= s
->ctx_len
;
777 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
782 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
784 struct xfrm_algo
*algo
;
787 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
788 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
792 algo
= nla_data(nla
);
793 strncpy(algo
->alg_name
, auth
->alg_name
, sizeof(algo
->alg_name
));
794 memcpy(algo
->alg_key
, auth
->alg_key
, (auth
->alg_key_len
+ 7) / 8);
795 algo
->alg_key_len
= auth
->alg_key_len
;
800 /* Don't change this without updating xfrm_sa_len! */
801 static int copy_to_user_state_extra(struct xfrm_state
*x
,
802 struct xfrm_usersa_info
*p
,
807 copy_to_user_state(x
, p
);
809 if (x
->props
.extra_flags
) {
810 ret
= nla_put_u32(skb
, XFRMA_SA_EXTRA_FLAGS
,
811 x
->props
.extra_flags
);
817 ret
= nla_put(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
822 ret
= nla_put_u64_64bit(skb
, XFRMA_LASTUSED
, x
->lastused
,
828 ret
= nla_put(skb
, XFRMA_ALG_AEAD
, aead_len(x
->aead
), x
->aead
);
833 ret
= copy_to_user_auth(x
->aalg
, skb
);
835 ret
= nla_put(skb
, XFRMA_ALG_AUTH_TRUNC
,
836 xfrm_alg_auth_len(x
->aalg
), x
->aalg
);
841 ret
= nla_put(skb
, XFRMA_ALG_CRYPT
, xfrm_alg_len(x
->ealg
), x
->ealg
);
846 ret
= nla_put(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
851 ret
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
856 ret
= nla_put_u32(skb
, XFRMA_TFCPAD
, x
->tfcpad
);
860 ret
= xfrm_mark_put(skb
, &x
->mark
);
864 ret
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
865 xfrm_replay_state_esn_len(x
->replay_esn
),
868 ret
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
873 ret
= copy_sec_ctx(x
->security
, skb
);
878 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
880 struct xfrm_dump_info
*sp
= ptr
;
881 struct sk_buff
*in_skb
= sp
->in_skb
;
882 struct sk_buff
*skb
= sp
->out_skb
;
883 struct xfrm_usersa_info
*p
;
884 struct nlmsghdr
*nlh
;
887 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
888 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
894 err
= copy_to_user_state_extra(x
, p
, skb
);
896 nlmsg_cancel(skb
, nlh
);
903 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
905 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
906 struct sock
*sk
= cb
->skb
->sk
;
907 struct net
*net
= sock_net(sk
);
910 xfrm_state_walk_done(walk
, net
);
914 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1];
915 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
917 struct net
*net
= sock_net(skb
->sk
);
918 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
919 struct xfrm_dump_info info
;
921 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
922 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
924 info
.in_skb
= cb
->skb
;
926 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
927 info
.nlmsg_flags
= NLM_F_MULTI
;
930 struct nlattr
*attrs
[XFRMA_MAX
+1];
931 struct xfrm_address_filter
*filter
= NULL
;
935 err
= nlmsg_parse(cb
->nlh
, 0, attrs
, XFRMA_MAX
,
940 if (attrs
[XFRMA_ADDRESS_FILTER
]) {
941 filter
= kmemdup(nla_data(attrs
[XFRMA_ADDRESS_FILTER
]),
942 sizeof(*filter
), GFP_KERNEL
);
947 if (attrs
[XFRMA_PROTO
])
948 proto
= nla_get_u8(attrs
[XFRMA_PROTO
]);
950 xfrm_state_walk_init(walk
, proto
, filter
);
954 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
959 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
960 struct xfrm_state
*x
, u32 seq
)
962 struct xfrm_dump_info info
;
966 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
968 return ERR_PTR(-ENOMEM
);
970 info
.in_skb
= in_skb
;
972 info
.nlmsg_seq
= seq
;
973 info
.nlmsg_flags
= 0;
975 err
= dump_one_state(x
, 0, &info
);
984 /* A wrapper for nlmsg_multicast() checking that nlsk is still available.
985 * Must be called with RCU read lock.
987 static inline int xfrm_nlmsg_multicast(struct net
*net
, struct sk_buff
*skb
,
988 u32 pid
, unsigned int group
)
990 struct sock
*nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
993 return nlmsg_multicast(nlsk
, skb
, pid
, group
, GFP_ATOMIC
);
998 static inline size_t xfrm_spdinfo_msgsize(void)
1000 return NLMSG_ALIGN(4)
1001 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
1002 + nla_total_size(sizeof(struct xfrmu_spdhinfo
))
1003 + nla_total_size(sizeof(struct xfrmu_spdhthresh
))
1004 + nla_total_size(sizeof(struct xfrmu_spdhthresh
));
1007 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
1008 u32 portid
, u32 seq
, u32 flags
)
1010 struct xfrmk_spdinfo si
;
1011 struct xfrmu_spdinfo spc
;
1012 struct xfrmu_spdhinfo sph
;
1013 struct xfrmu_spdhthresh spt4
, spt6
;
1014 struct nlmsghdr
*nlh
;
1019 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
1020 if (nlh
== NULL
) /* shouldn't really happen ... */
1023 f
= nlmsg_data(nlh
);
1025 xfrm_spd_getinfo(net
, &si
);
1026 spc
.incnt
= si
.incnt
;
1027 spc
.outcnt
= si
.outcnt
;
1028 spc
.fwdcnt
= si
.fwdcnt
;
1029 spc
.inscnt
= si
.inscnt
;
1030 spc
.outscnt
= si
.outscnt
;
1031 spc
.fwdscnt
= si
.fwdscnt
;
1032 sph
.spdhcnt
= si
.spdhcnt
;
1033 sph
.spdhmcnt
= si
.spdhmcnt
;
1036 lseq
= read_seqbegin(&net
->xfrm
.policy_hthresh
.lock
);
1038 spt4
.lbits
= net
->xfrm
.policy_hthresh
.lbits4
;
1039 spt4
.rbits
= net
->xfrm
.policy_hthresh
.rbits4
;
1040 spt6
.lbits
= net
->xfrm
.policy_hthresh
.lbits6
;
1041 spt6
.rbits
= net
->xfrm
.policy_hthresh
.rbits6
;
1042 } while (read_seqretry(&net
->xfrm
.policy_hthresh
.lock
, lseq
));
1044 err
= nla_put(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
1046 err
= nla_put(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
1048 err
= nla_put(skb
, XFRMA_SPD_IPV4_HTHRESH
, sizeof(spt4
), &spt4
);
1050 err
= nla_put(skb
, XFRMA_SPD_IPV6_HTHRESH
, sizeof(spt6
), &spt6
);
1052 nlmsg_cancel(skb
, nlh
);
1056 nlmsg_end(skb
, nlh
);
1060 static int xfrm_set_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1061 struct nlattr
**attrs
)
1063 struct net
*net
= sock_net(skb
->sk
);
1064 struct xfrmu_spdhthresh
*thresh4
= NULL
;
1065 struct xfrmu_spdhthresh
*thresh6
= NULL
;
1067 /* selector prefixlen thresholds to hash policies */
1068 if (attrs
[XFRMA_SPD_IPV4_HTHRESH
]) {
1069 struct nlattr
*rta
= attrs
[XFRMA_SPD_IPV4_HTHRESH
];
1071 if (nla_len(rta
) < sizeof(*thresh4
))
1073 thresh4
= nla_data(rta
);
1074 if (thresh4
->lbits
> 32 || thresh4
->rbits
> 32)
1077 if (attrs
[XFRMA_SPD_IPV6_HTHRESH
]) {
1078 struct nlattr
*rta
= attrs
[XFRMA_SPD_IPV6_HTHRESH
];
1080 if (nla_len(rta
) < sizeof(*thresh6
))
1082 thresh6
= nla_data(rta
);
1083 if (thresh6
->lbits
> 128 || thresh6
->rbits
> 128)
1087 if (thresh4
|| thresh6
) {
1088 write_seqlock(&net
->xfrm
.policy_hthresh
.lock
);
1090 net
->xfrm
.policy_hthresh
.lbits4
= thresh4
->lbits
;
1091 net
->xfrm
.policy_hthresh
.rbits4
= thresh4
->rbits
;
1094 net
->xfrm
.policy_hthresh
.lbits6
= thresh6
->lbits
;
1095 net
->xfrm
.policy_hthresh
.rbits6
= thresh6
->rbits
;
1097 write_sequnlock(&net
->xfrm
.policy_hthresh
.lock
);
1099 xfrm_policy_hash_rebuild(net
);
1105 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1106 struct nlattr
**attrs
)
1108 struct net
*net
= sock_net(skb
->sk
);
1109 struct sk_buff
*r_skb
;
1110 u32
*flags
= nlmsg_data(nlh
);
1111 u32 sportid
= NETLINK_CB(skb
).portid
;
1112 u32 seq
= nlh
->nlmsg_seq
;
1114 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
1118 if (build_spdinfo(r_skb
, net
, sportid
, seq
, *flags
) < 0)
1121 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1124 static inline size_t xfrm_sadinfo_msgsize(void)
1126 return NLMSG_ALIGN(4)
1127 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
1128 + nla_total_size(4); /* XFRMA_SAD_CNT */
1131 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
1132 u32 portid
, u32 seq
, u32 flags
)
1134 struct xfrmk_sadinfo si
;
1135 struct xfrmu_sadhinfo sh
;
1136 struct nlmsghdr
*nlh
;
1140 nlh
= nlmsg_put(skb
, portid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
1141 if (nlh
== NULL
) /* shouldn't really happen ... */
1144 f
= nlmsg_data(nlh
);
1146 xfrm_sad_getinfo(net
, &si
);
1148 sh
.sadhmcnt
= si
.sadhmcnt
;
1149 sh
.sadhcnt
= si
.sadhcnt
;
1151 err
= nla_put_u32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
1153 err
= nla_put(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
1155 nlmsg_cancel(skb
, nlh
);
1159 nlmsg_end(skb
, nlh
);
1163 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1164 struct nlattr
**attrs
)
1166 struct net
*net
= sock_net(skb
->sk
);
1167 struct sk_buff
*r_skb
;
1168 u32
*flags
= nlmsg_data(nlh
);
1169 u32 sportid
= NETLINK_CB(skb
).portid
;
1170 u32 seq
= nlh
->nlmsg_seq
;
1172 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
1176 if (build_sadinfo(r_skb
, net
, sportid
, seq
, *flags
) < 0)
1179 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, sportid
);
1182 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1183 struct nlattr
**attrs
)
1185 struct net
*net
= sock_net(skb
->sk
);
1186 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
1187 struct xfrm_state
*x
;
1188 struct sk_buff
*resp_skb
;
1191 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
1195 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1196 if (IS_ERR(resp_skb
)) {
1197 err
= PTR_ERR(resp_skb
);
1199 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1206 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1207 struct nlattr
**attrs
)
1209 struct net
*net
= sock_net(skb
->sk
);
1210 struct xfrm_state
*x
;
1211 struct xfrm_userspi_info
*p
;
1212 struct sk_buff
*resp_skb
;
1213 xfrm_address_t
*daddr
;
1219 p
= nlmsg_data(nlh
);
1220 err
= verify_spi_info(p
->info
.id
.proto
, p
->min
, p
->max
);
1224 family
= p
->info
.family
;
1225 daddr
= &p
->info
.id
.daddr
;
1229 mark
= xfrm_mark_get(attrs
, &m
);
1231 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
1232 if (x
&& !xfrm_addr_equal(&x
->id
.daddr
, daddr
, family
)) {
1239 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
1240 p
->info
.id
.proto
, daddr
,
1247 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
1251 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1252 if (IS_ERR(resp_skb
)) {
1253 err
= PTR_ERR(resp_skb
);
1257 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).portid
);
1265 static int verify_policy_dir(u8 dir
)
1268 case XFRM_POLICY_IN
:
1269 case XFRM_POLICY_OUT
:
1270 case XFRM_POLICY_FWD
:
1280 static int verify_policy_type(u8 type
)
1283 case XFRM_POLICY_TYPE_MAIN
:
1284 #ifdef CONFIG_XFRM_SUB_POLICY
1285 case XFRM_POLICY_TYPE_SUB
:
1296 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1301 case XFRM_SHARE_ANY
:
1302 case XFRM_SHARE_SESSION
:
1303 case XFRM_SHARE_USER
:
1304 case XFRM_SHARE_UNIQUE
:
1311 switch (p
->action
) {
1312 case XFRM_POLICY_ALLOW
:
1313 case XFRM_POLICY_BLOCK
:
1320 switch (p
->sel
.family
) {
1325 #if IS_ENABLED(CONFIG_IPV6)
1328 return -EAFNOSUPPORT
;
1335 ret
= verify_policy_dir(p
->dir
);
1338 if (p
->index
&& ((p
->index
& XFRM_POLICY_MAX
) != p
->dir
))
1344 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1346 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1347 struct xfrm_user_sec_ctx
*uctx
;
1352 uctx
= nla_data(rt
);
1353 return security_xfrm_policy_alloc(&pol
->security
, uctx
, GFP_KERNEL
);
1356 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1362 for (i
= 0; i
< nr
; i
++, ut
++) {
1363 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1365 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1366 memcpy(&t
->saddr
, &ut
->saddr
,
1367 sizeof(xfrm_address_t
));
1368 t
->reqid
= ut
->reqid
;
1370 t
->share
= ut
->share
;
1371 t
->optional
= ut
->optional
;
1372 t
->aalgos
= ut
->aalgos
;
1373 t
->ealgos
= ut
->ealgos
;
1374 t
->calgos
= ut
->calgos
;
1375 /* If all masks are ~0, then we allow all algorithms. */
1376 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1377 t
->encap_family
= ut
->family
;
1381 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1385 if (nr
> XFRM_MAX_DEPTH
)
1388 for (i
= 0; i
< nr
; i
++) {
1389 /* We never validated the ut->family value, so many
1390 * applications simply leave it at zero. The check was
1391 * never made and ut->family was ignored because all
1392 * templates could be assumed to have the same family as
1393 * the policy itself. Now that we will have ipv4-in-ipv6
1394 * and ipv6-in-ipv4 tunnels, this is no longer true.
1397 ut
[i
].family
= family
;
1399 switch (ut
[i
].family
) {
1402 #if IS_ENABLED(CONFIG_IPV6)
1414 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1416 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1421 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1422 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1425 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1429 copy_templates(pol
, utmpl
, nr
);
1434 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1436 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1437 struct xfrm_userpolicy_type
*upt
;
1438 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1446 err
= verify_policy_type(type
);
1454 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1456 xp
->priority
= p
->priority
;
1457 xp
->index
= p
->index
;
1458 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1459 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1460 xp
->action
= p
->action
;
1461 xp
->flags
= p
->flags
;
1462 xp
->family
= p
->sel
.family
;
1463 /* XXX xp->share = p->share; */
1466 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1468 memset(p
, 0, sizeof(*p
));
1469 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1470 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1471 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1472 p
->priority
= xp
->priority
;
1473 p
->index
= xp
->index
;
1474 p
->sel
.family
= xp
->family
;
1476 p
->action
= xp
->action
;
1477 p
->flags
= xp
->flags
;
1478 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1481 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1483 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1491 copy_from_user_policy(xp
, p
);
1493 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1497 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1498 err
= copy_from_user_sec_ctx(xp
, attrs
);
1502 xfrm_mark_get(attrs
, &xp
->mark
);
1508 xfrm_policy_destroy(xp
);
1512 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1513 struct nlattr
**attrs
)
1515 struct net
*net
= sock_net(skb
->sk
);
1516 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1517 struct xfrm_policy
*xp
;
1522 err
= verify_newpolicy_info(p
);
1525 err
= verify_sec_ctx_len(attrs
);
1529 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1533 /* shouldn't excl be based on nlh flags??
1534 * Aha! this is anti-netlink really i.e more pfkey derived
1535 * in netlink excl is a flag and you wouldnt need
1536 * a type XFRM_MSG_UPDPOLICY - JHS */
1537 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1538 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1539 xfrm_audit_policy_add(xp
, err
? 0 : 1, true);
1542 security_xfrm_policy_free(xp
->security
);
1547 c
.event
= nlh
->nlmsg_type
;
1548 c
.seq
= nlh
->nlmsg_seq
;
1549 c
.portid
= nlh
->nlmsg_pid
;
1550 km_policy_notify(xp
, p
->dir
, &c
);
1557 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1559 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1562 if (xp
->xfrm_nr
== 0)
1565 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1566 struct xfrm_user_tmpl
*up
= &vec
[i
];
1567 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1569 memset(up
, 0, sizeof(*up
));
1570 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1571 up
->family
= kp
->encap_family
;
1572 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1573 up
->reqid
= kp
->reqid
;
1574 up
->mode
= kp
->mode
;
1575 up
->share
= kp
->share
;
1576 up
->optional
= kp
->optional
;
1577 up
->aalgos
= kp
->aalgos
;
1578 up
->ealgos
= kp
->ealgos
;
1579 up
->calgos
= kp
->calgos
;
1582 return nla_put(skb
, XFRMA_TMPL
,
1583 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1586 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1589 return copy_sec_ctx(x
->security
, skb
);
1594 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1597 return copy_sec_ctx(xp
->security
, skb
);
1600 static inline size_t userpolicy_type_attrsize(void)
1602 #ifdef CONFIG_XFRM_SUB_POLICY
1603 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1609 #ifdef CONFIG_XFRM_SUB_POLICY
1610 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1612 struct xfrm_userpolicy_type upt
= {
1616 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1620 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1626 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1628 struct xfrm_dump_info
*sp
= ptr
;
1629 struct xfrm_userpolicy_info
*p
;
1630 struct sk_buff
*in_skb
= sp
->in_skb
;
1631 struct sk_buff
*skb
= sp
->out_skb
;
1632 struct nlmsghdr
*nlh
;
1635 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).portid
, sp
->nlmsg_seq
,
1636 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1640 p
= nlmsg_data(nlh
);
1641 copy_to_user_policy(xp
, p
, dir
);
1642 err
= copy_to_user_tmpl(xp
, skb
);
1644 err
= copy_to_user_sec_ctx(xp
, skb
);
1646 err
= copy_to_user_policy_type(xp
->type
, skb
);
1648 err
= xfrm_mark_put(skb
, &xp
->mark
);
1650 nlmsg_cancel(skb
, nlh
);
1653 nlmsg_end(skb
, nlh
);
1657 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1659 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1660 struct net
*net
= sock_net(cb
->skb
->sk
);
1662 xfrm_policy_walk_done(walk
, net
);
1666 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1668 struct net
*net
= sock_net(skb
->sk
);
1669 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1670 struct xfrm_dump_info info
;
1672 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk
) >
1673 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1675 info
.in_skb
= cb
->skb
;
1677 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1678 info
.nlmsg_flags
= NLM_F_MULTI
;
1682 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1685 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1690 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1691 struct xfrm_policy
*xp
,
1694 struct xfrm_dump_info info
;
1695 struct sk_buff
*skb
;
1698 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1700 return ERR_PTR(-ENOMEM
);
1702 info
.in_skb
= in_skb
;
1704 info
.nlmsg_seq
= seq
;
1705 info
.nlmsg_flags
= 0;
1707 err
= dump_one_policy(xp
, dir
, 0, &info
);
1710 return ERR_PTR(err
);
1716 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1717 struct nlattr
**attrs
)
1719 struct net
*net
= sock_net(skb
->sk
);
1720 struct xfrm_policy
*xp
;
1721 struct xfrm_userpolicy_id
*p
;
1722 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1727 u32 mark
= xfrm_mark_get(attrs
, &m
);
1729 p
= nlmsg_data(nlh
);
1730 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1732 err
= copy_from_user_policy_type(&type
, attrs
);
1736 err
= verify_policy_dir(p
->dir
);
1741 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, delete, &err
);
1743 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1744 struct xfrm_sec_ctx
*ctx
;
1746 err
= verify_sec_ctx_len(attrs
);
1752 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1754 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
1758 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
, &p
->sel
,
1760 security_xfrm_policy_free(ctx
);
1766 struct sk_buff
*resp_skb
;
1768 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1769 if (IS_ERR(resp_skb
)) {
1770 err
= PTR_ERR(resp_skb
);
1772 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
1773 NETLINK_CB(skb
).portid
);
1776 xfrm_audit_policy_delete(xp
, err
? 0 : 1, true);
1781 c
.data
.byid
= p
->index
;
1782 c
.event
= nlh
->nlmsg_type
;
1783 c
.seq
= nlh
->nlmsg_seq
;
1784 c
.portid
= nlh
->nlmsg_pid
;
1785 km_policy_notify(xp
, p
->dir
, &c
);
1790 if (delete && err
== 0)
1791 xfrm_garbage_collect(net
);
1795 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1796 struct nlattr
**attrs
)
1798 struct net
*net
= sock_net(skb
->sk
);
1800 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1803 err
= xfrm_state_flush(net
, p
->proto
, true);
1805 if (err
== -ESRCH
) /* empty table */
1809 c
.data
.proto
= p
->proto
;
1810 c
.event
= nlh
->nlmsg_type
;
1811 c
.seq
= nlh
->nlmsg_seq
;
1812 c
.portid
= nlh
->nlmsg_pid
;
1814 km_state_notify(NULL
, &c
);
1819 static inline size_t xfrm_aevent_msgsize(struct xfrm_state
*x
)
1821 size_t replay_size
= x
->replay_esn
?
1822 xfrm_replay_state_esn_len(x
->replay_esn
) :
1823 sizeof(struct xfrm_replay_state
);
1825 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
1826 + nla_total_size(replay_size
)
1827 + nla_total_size_64bit(sizeof(struct xfrm_lifetime_cur
))
1828 + nla_total_size(sizeof(struct xfrm_mark
))
1829 + nla_total_size(4) /* XFRM_AE_RTHR */
1830 + nla_total_size(4); /* XFRM_AE_ETHR */
1833 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
1835 struct xfrm_aevent_id
*id
;
1836 struct nlmsghdr
*nlh
;
1839 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1843 id
= nlmsg_data(nlh
);
1844 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
, sizeof(x
->id
.daddr
));
1845 id
->sa_id
.spi
= x
->id
.spi
;
1846 id
->sa_id
.family
= x
->props
.family
;
1847 id
->sa_id
.proto
= x
->id
.proto
;
1848 memcpy(&id
->saddr
, &x
->props
.saddr
, sizeof(x
->props
.saddr
));
1849 id
->reqid
= x
->props
.reqid
;
1850 id
->flags
= c
->data
.aevent
;
1852 if (x
->replay_esn
) {
1853 err
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
1854 xfrm_replay_state_esn_len(x
->replay_esn
),
1857 err
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
1862 err
= nla_put_64bit(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
,
1867 if (id
->flags
& XFRM_AE_RTHR
) {
1868 err
= nla_put_u32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
1872 if (id
->flags
& XFRM_AE_ETHR
) {
1873 err
= nla_put_u32(skb
, XFRMA_ETIMER_THRESH
,
1874 x
->replay_maxage
* 10 / HZ
);
1878 err
= xfrm_mark_put(skb
, &x
->mark
);
1882 nlmsg_end(skb
, nlh
);
1886 nlmsg_cancel(skb
, nlh
);
1890 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1891 struct nlattr
**attrs
)
1893 struct net
*net
= sock_net(skb
->sk
);
1894 struct xfrm_state
*x
;
1895 struct sk_buff
*r_skb
;
1900 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1901 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1903 mark
= xfrm_mark_get(attrs
, &m
);
1905 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1909 r_skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
1910 if (r_skb
== NULL
) {
1916 * XXX: is this lock really needed - none of the other
1917 * gets lock (the concern is things getting updated
1918 * while we are still reading) - jhs
1920 spin_lock_bh(&x
->lock
);
1921 c
.data
.aevent
= p
->flags
;
1922 c
.seq
= nlh
->nlmsg_seq
;
1923 c
.portid
= nlh
->nlmsg_pid
;
1925 if (build_aevent(r_skb
, x
, &c
) < 0)
1927 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).portid
);
1928 spin_unlock_bh(&x
->lock
);
1933 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1934 struct nlattr
**attrs
)
1936 struct net
*net
= sock_net(skb
->sk
);
1937 struct xfrm_state
*x
;
1942 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1943 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
1944 struct nlattr
*re
= attrs
[XFRMA_REPLAY_ESN_VAL
];
1945 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
1946 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
1947 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
1949 if (!lt
&& !rp
&& !re
&& !et
&& !rt
)
1952 /* pedantic mode - thou shalt sayeth replaceth */
1953 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1956 mark
= xfrm_mark_get(attrs
, &m
);
1958 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1962 if (x
->km
.state
!= XFRM_STATE_VALID
)
1965 err
= xfrm_replay_verify_len(x
->replay_esn
, re
);
1969 spin_lock_bh(&x
->lock
);
1970 xfrm_update_ae_params(x
, attrs
, 1);
1971 spin_unlock_bh(&x
->lock
);
1973 c
.event
= nlh
->nlmsg_type
;
1974 c
.seq
= nlh
->nlmsg_seq
;
1975 c
.portid
= nlh
->nlmsg_pid
;
1976 c
.data
.aevent
= XFRM_AE_CU
;
1977 km_state_notify(x
, &c
);
1984 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1985 struct nlattr
**attrs
)
1987 struct net
*net
= sock_net(skb
->sk
);
1989 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1992 err
= copy_from_user_policy_type(&type
, attrs
);
1996 err
= xfrm_policy_flush(net
, type
, true);
1998 if (err
== -ESRCH
) /* empty table */
2004 c
.event
= nlh
->nlmsg_type
;
2005 c
.seq
= nlh
->nlmsg_seq
;
2006 c
.portid
= nlh
->nlmsg_pid
;
2008 km_policy_notify(NULL
, 0, &c
);
2012 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2013 struct nlattr
**attrs
)
2015 struct net
*net
= sock_net(skb
->sk
);
2016 struct xfrm_policy
*xp
;
2017 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
2018 struct xfrm_userpolicy_info
*p
= &up
->pol
;
2019 u8 type
= XFRM_POLICY_TYPE_MAIN
;
2022 u32 mark
= xfrm_mark_get(attrs
, &m
);
2024 err
= copy_from_user_policy_type(&type
, attrs
);
2028 err
= verify_policy_dir(p
->dir
);
2033 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, 0, &err
);
2035 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
2036 struct xfrm_sec_ctx
*ctx
;
2038 err
= verify_sec_ctx_len(attrs
);
2044 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
2046 err
= security_xfrm_policy_alloc(&ctx
, uctx
, GFP_KERNEL
);
2050 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
,
2051 &p
->sel
, ctx
, 0, &err
);
2052 security_xfrm_policy_free(ctx
);
2057 if (unlikely(xp
->walk
.dead
))
2062 xfrm_policy_delete(xp
, p
->dir
);
2063 xfrm_audit_policy_delete(xp
, 1, true);
2065 km_policy_expired(xp
, p
->dir
, up
->hard
, nlh
->nlmsg_pid
);
2072 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2073 struct nlattr
**attrs
)
2075 struct net
*net
= sock_net(skb
->sk
);
2076 struct xfrm_state
*x
;
2078 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
2079 struct xfrm_usersa_info
*p
= &ue
->state
;
2081 u32 mark
= xfrm_mark_get(attrs
, &m
);
2083 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
2089 spin_lock_bh(&x
->lock
);
2091 if (x
->km
.state
!= XFRM_STATE_VALID
)
2093 km_state_expired(x
, ue
->hard
, nlh
->nlmsg_pid
);
2096 __xfrm_state_delete(x
);
2097 xfrm_audit_state_delete(x
, 1, true);
2101 spin_unlock_bh(&x
->lock
);
2106 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2107 struct nlattr
**attrs
)
2109 struct net
*net
= sock_net(skb
->sk
);
2110 struct xfrm_policy
*xp
;
2111 struct xfrm_user_tmpl
*ut
;
2113 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
2114 struct xfrm_mark mark
;
2116 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
2117 struct xfrm_state
*x
= xfrm_state_alloc(net
);
2123 xfrm_mark_get(attrs
, &mark
);
2125 err
= verify_newpolicy_info(&ua
->policy
);
2130 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
2134 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
2135 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
2136 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
2137 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
2138 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
2140 /* extract the templates and for each call km_key */
2141 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
2142 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
2143 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
2144 x
->props
.mode
= t
->mode
;
2145 x
->props
.reqid
= t
->reqid
;
2146 x
->props
.family
= ut
->family
;
2147 t
->aalgos
= ua
->aalgos
;
2148 t
->ealgos
= ua
->ealgos
;
2149 t
->calgos
= ua
->calgos
;
2150 err
= km_query(x
, t
, xp
);
2165 #ifdef CONFIG_XFRM_MIGRATE
2166 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
2167 struct xfrm_kmaddress
*k
,
2168 struct nlattr
**attrs
, int *num
)
2170 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
2171 struct xfrm_user_migrate
*um
;
2175 struct xfrm_user_kmaddress
*uk
;
2177 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
2178 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
2179 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
2180 k
->family
= uk
->family
;
2181 k
->reserved
= uk
->reserved
;
2185 num_migrate
= nla_len(rt
) / sizeof(*um
);
2187 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
2190 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
2191 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
2192 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
2193 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
2194 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
2196 ma
->proto
= um
->proto
;
2197 ma
->mode
= um
->mode
;
2198 ma
->reqid
= um
->reqid
;
2200 ma
->old_family
= um
->old_family
;
2201 ma
->new_family
= um
->new_family
;
2208 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2209 struct nlattr
**attrs
)
2211 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
2212 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
2213 struct xfrm_kmaddress km
, *kmp
;
2217 struct net
*net
= sock_net(skb
->sk
);
2219 if (attrs
[XFRMA_MIGRATE
] == NULL
)
2222 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
2224 err
= copy_from_user_policy_type(&type
, attrs
);
2228 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
2235 xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
, net
);
2240 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2241 struct nlattr
**attrs
)
2243 return -ENOPROTOOPT
;
2247 #ifdef CONFIG_XFRM_MIGRATE
2248 static int copy_to_user_migrate(const struct xfrm_migrate
*m
, struct sk_buff
*skb
)
2250 struct xfrm_user_migrate um
;
2252 memset(&um
, 0, sizeof(um
));
2253 um
.proto
= m
->proto
;
2255 um
.reqid
= m
->reqid
;
2256 um
.old_family
= m
->old_family
;
2257 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
2258 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
2259 um
.new_family
= m
->new_family
;
2260 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
2261 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
2263 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
2266 static int copy_to_user_kmaddress(const struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
2268 struct xfrm_user_kmaddress uk
;
2270 memset(&uk
, 0, sizeof(uk
));
2271 uk
.family
= k
->family
;
2272 uk
.reserved
= k
->reserved
;
2273 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
2274 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
2276 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2279 static inline size_t xfrm_migrate_msgsize(int num_migrate
, int with_kma
)
2281 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2282 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2283 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2284 + userpolicy_type_attrsize();
2287 static int build_migrate(struct sk_buff
*skb
, const struct xfrm_migrate
*m
,
2288 int num_migrate
, const struct xfrm_kmaddress
*k
,
2289 const struct xfrm_selector
*sel
, u8 dir
, u8 type
)
2291 const struct xfrm_migrate
*mp
;
2292 struct xfrm_userpolicy_id
*pol_id
;
2293 struct nlmsghdr
*nlh
;
2296 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2300 pol_id
= nlmsg_data(nlh
);
2301 /* copy data from selector, dir, and type to the pol_id */
2302 memset(pol_id
, 0, sizeof(*pol_id
));
2303 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2307 err
= copy_to_user_kmaddress(k
, skb
);
2311 err
= copy_to_user_policy_type(type
, skb
);
2314 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2315 err
= copy_to_user_migrate(mp
, skb
);
2320 nlmsg_end(skb
, nlh
);
2324 nlmsg_cancel(skb
, nlh
);
2328 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2329 const struct xfrm_migrate
*m
, int num_migrate
,
2330 const struct xfrm_kmaddress
*k
)
2332 struct net
*net
= &init_net
;
2333 struct sk_buff
*skb
;
2335 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
), GFP_ATOMIC
);
2340 if (build_migrate(skb
, m
, num_migrate
, k
, sel
, dir
, type
) < 0)
2343 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_MIGRATE
);
2346 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2347 const struct xfrm_migrate
*m
, int num_migrate
,
2348 const struct xfrm_kmaddress
*k
)
2350 return -ENOPROTOOPT
;
2354 #define XMSGSIZE(type) sizeof(struct type)
2356 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2357 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2358 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2359 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2360 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2361 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2362 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2363 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2364 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2365 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2366 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2367 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2368 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2369 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2370 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2371 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2372 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2373 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2374 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2375 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2376 [XFRM_MSG_NEWSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2377 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2382 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2383 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2384 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2385 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2386 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2387 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2388 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2389 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2390 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2391 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2392 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2393 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2394 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2395 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2396 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2397 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2398 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2399 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2400 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2401 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2402 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2403 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2404 [XFRMA_TFCPAD
] = { .type
= NLA_U32
},
2405 [XFRMA_REPLAY_ESN_VAL
] = { .len
= sizeof(struct xfrm_replay_state_esn
) },
2406 [XFRMA_SA_EXTRA_FLAGS
] = { .type
= NLA_U32
},
2407 [XFRMA_PROTO
] = { .type
= NLA_U8
},
2408 [XFRMA_ADDRESS_FILTER
] = { .len
= sizeof(struct xfrm_address_filter
) },
2411 static const struct nla_policy xfrma_spd_policy
[XFRMA_SPD_MAX
+1] = {
2412 [XFRMA_SPD_IPV4_HTHRESH
] = { .len
= sizeof(struct xfrmu_spdhthresh
) },
2413 [XFRMA_SPD_IPV6_HTHRESH
] = { .len
= sizeof(struct xfrmu_spdhthresh
) },
2416 static const struct xfrm_link
{
2417 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2418 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2419 int (*done
)(struct netlink_callback
*);
2420 const struct nla_policy
*nla_pol
;
2422 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2423 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2424 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2425 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2426 .dump
= xfrm_dump_sa
,
2427 .done
= xfrm_dump_sa_done
},
2428 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2429 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2430 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2431 .dump
= xfrm_dump_policy
,
2432 .done
= xfrm_dump_policy_done
},
2433 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2434 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2435 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2436 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2437 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2438 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2439 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2440 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2441 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2442 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2443 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2444 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2445 [XFRM_MSG_NEWSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_set_spdinfo
,
2446 .nla_pol
= xfrma_spd_policy
,
2447 .nla_max
= XFRMA_SPD_MAX
},
2448 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2451 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2453 struct net
*net
= sock_net(skb
->sk
);
2454 struct nlattr
*attrs
[XFRMA_MAX
+1];
2455 const struct xfrm_link
*link
;
2458 #ifdef CONFIG_COMPAT
2459 if (in_compat_syscall())
2463 type
= nlh
->nlmsg_type
;
2464 if (type
> XFRM_MSG_MAX
)
2467 type
-= XFRM_MSG_BASE
;
2468 link
= &xfrm_dispatch
[type
];
2470 /* All operations require privileges, even GET */
2471 if (!netlink_net_capable(skb
, CAP_NET_ADMIN
))
2474 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2475 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2476 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2477 if (link
->dump
== NULL
)
2481 struct netlink_dump_control c
= {
2485 return netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, &c
);
2489 err
= nlmsg_parse(nlh
, xfrm_msg_min
[type
], attrs
,
2490 link
->nla_max
? : XFRMA_MAX
,
2491 link
->nla_pol
? : xfrma_policy
);
2495 if (link
->doit
== NULL
)
2498 return link
->doit(skb
, nlh
, attrs
);
2501 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2503 struct net
*net
= sock_net(skb
->sk
);
2505 mutex_lock(&net
->xfrm
.xfrm_cfg_mutex
);
2506 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2507 mutex_unlock(&net
->xfrm
.xfrm_cfg_mutex
);
2510 static inline size_t xfrm_expire_msgsize(void)
2512 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2513 + nla_total_size(sizeof(struct xfrm_mark
));
2516 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
2518 struct xfrm_user_expire
*ue
;
2519 struct nlmsghdr
*nlh
;
2522 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2526 ue
= nlmsg_data(nlh
);
2527 copy_to_user_state(x
, &ue
->state
);
2528 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2530 err
= xfrm_mark_put(skb
, &x
->mark
);
2534 nlmsg_end(skb
, nlh
);
2538 static int xfrm_exp_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2540 struct net
*net
= xs_net(x
);
2541 struct sk_buff
*skb
;
2543 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2547 if (build_expire(skb
, x
, c
) < 0) {
2552 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_EXPIRE
);
2555 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2557 struct net
*net
= xs_net(x
);
2558 struct sk_buff
*skb
;
2560 skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
2564 if (build_aevent(skb
, x
, c
) < 0)
2567 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_AEVENTS
);
2570 static int xfrm_notify_sa_flush(const struct km_event
*c
)
2572 struct net
*net
= c
->net
;
2573 struct xfrm_usersa_flush
*p
;
2574 struct nlmsghdr
*nlh
;
2575 struct sk_buff
*skb
;
2576 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2578 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2582 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2588 p
= nlmsg_data(nlh
);
2589 p
->proto
= c
->data
.proto
;
2591 nlmsg_end(skb
, nlh
);
2593 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_SA
);
2596 static inline size_t xfrm_sa_len(struct xfrm_state
*x
)
2600 l
+= nla_total_size(aead_len(x
->aead
));
2602 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2603 (x
->aalg
->alg_key_len
+ 7) / 8);
2604 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2607 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
2609 l
+= nla_total_size(sizeof(*x
->calg
));
2611 l
+= nla_total_size(sizeof(*x
->encap
));
2613 l
+= nla_total_size(sizeof(x
->tfcpad
));
2615 l
+= nla_total_size(xfrm_replay_state_esn_len(x
->replay_esn
));
2617 l
+= nla_total_size(sizeof(struct xfrm_replay_state
));
2619 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
2620 x
->security
->ctx_len
);
2622 l
+= nla_total_size(sizeof(*x
->coaddr
));
2623 if (x
->props
.extra_flags
)
2624 l
+= nla_total_size(sizeof(x
->props
.extra_flags
));
2626 /* Must count x->lastused as it may become non-zero behind our back. */
2627 l
+= nla_total_size_64bit(sizeof(u64
));
2632 static int xfrm_notify_sa(struct xfrm_state
*x
, const struct km_event
*c
)
2634 struct net
*net
= xs_net(x
);
2635 struct xfrm_usersa_info
*p
;
2636 struct xfrm_usersa_id
*id
;
2637 struct nlmsghdr
*nlh
;
2638 struct sk_buff
*skb
;
2639 int len
= xfrm_sa_len(x
);
2642 headlen
= sizeof(*p
);
2643 if (c
->event
== XFRM_MSG_DELSA
) {
2644 len
+= nla_total_size(headlen
);
2645 headlen
= sizeof(*id
);
2646 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2648 len
+= NLMSG_ALIGN(headlen
);
2650 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2654 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
2659 p
= nlmsg_data(nlh
);
2660 if (c
->event
== XFRM_MSG_DELSA
) {
2661 struct nlattr
*attr
;
2663 id
= nlmsg_data(nlh
);
2664 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2665 id
->spi
= x
->id
.spi
;
2666 id
->family
= x
->props
.family
;
2667 id
->proto
= x
->id
.proto
;
2669 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
2676 err
= copy_to_user_state_extra(x
, p
, skb
);
2680 nlmsg_end(skb
, nlh
);
2682 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_SA
);
2689 static int xfrm_send_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2693 case XFRM_MSG_EXPIRE
:
2694 return xfrm_exp_state_notify(x
, c
);
2695 case XFRM_MSG_NEWAE
:
2696 return xfrm_aevent_state_notify(x
, c
);
2697 case XFRM_MSG_DELSA
:
2698 case XFRM_MSG_UPDSA
:
2699 case XFRM_MSG_NEWSA
:
2700 return xfrm_notify_sa(x
, c
);
2701 case XFRM_MSG_FLUSHSA
:
2702 return xfrm_notify_sa_flush(c
);
2704 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
2713 static inline size_t xfrm_acquire_msgsize(struct xfrm_state
*x
,
2714 struct xfrm_policy
*xp
)
2716 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
2717 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2718 + nla_total_size(sizeof(struct xfrm_mark
))
2719 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
2720 + userpolicy_type_attrsize();
2723 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2724 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
)
2726 __u32 seq
= xfrm_get_acqseq();
2727 struct xfrm_user_acquire
*ua
;
2728 struct nlmsghdr
*nlh
;
2731 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2735 ua
= nlmsg_data(nlh
);
2736 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2737 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2738 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2739 copy_to_user_policy(xp
, &ua
->policy
, XFRM_POLICY_OUT
);
2740 ua
->aalgos
= xt
->aalgos
;
2741 ua
->ealgos
= xt
->ealgos
;
2742 ua
->calgos
= xt
->calgos
;
2743 ua
->seq
= x
->km
.seq
= seq
;
2745 err
= copy_to_user_tmpl(xp
, skb
);
2747 err
= copy_to_user_state_sec_ctx(x
, skb
);
2749 err
= copy_to_user_policy_type(xp
->type
, skb
);
2751 err
= xfrm_mark_put(skb
, &xp
->mark
);
2753 nlmsg_cancel(skb
, nlh
);
2757 nlmsg_end(skb
, nlh
);
2761 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2762 struct xfrm_policy
*xp
)
2764 struct net
*net
= xs_net(x
);
2765 struct sk_buff
*skb
;
2767 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
2771 if (build_acquire(skb
, x
, xt
, xp
) < 0)
2774 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_ACQUIRE
);
2777 /* User gives us xfrm_user_policy_info followed by an array of 0
2778 * or more templates.
2780 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2781 u8
*data
, int len
, int *dir
)
2783 struct net
*net
= sock_net(sk
);
2784 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2785 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2786 struct xfrm_policy
*xp
;
2789 switch (sk
->sk_family
) {
2791 if (opt
!= IP_XFRM_POLICY
) {
2796 #if IS_ENABLED(CONFIG_IPV6)
2798 if (opt
!= IPV6_XFRM_POLICY
) {
2811 if (len
< sizeof(*p
) ||
2812 verify_newpolicy_info(p
))
2815 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2816 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2819 if (p
->dir
> XFRM_POLICY_OUT
)
2822 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
2828 copy_from_user_policy(xp
, p
);
2829 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2830 copy_templates(xp
, ut
, nr
);
2837 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
2839 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
2840 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2841 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
2842 + nla_total_size(sizeof(struct xfrm_mark
))
2843 + userpolicy_type_attrsize();
2846 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2847 int dir
, const struct km_event
*c
)
2849 struct xfrm_user_polexpire
*upe
;
2850 int hard
= c
->data
.hard
;
2851 struct nlmsghdr
*nlh
;
2854 nlh
= nlmsg_put(skb
, c
->portid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2858 upe
= nlmsg_data(nlh
);
2859 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2860 err
= copy_to_user_tmpl(xp
, skb
);
2862 err
= copy_to_user_sec_ctx(xp
, skb
);
2864 err
= copy_to_user_policy_type(xp
->type
, skb
);
2866 err
= xfrm_mark_put(skb
, &xp
->mark
);
2868 nlmsg_cancel(skb
, nlh
);
2873 nlmsg_end(skb
, nlh
);
2877 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2879 struct net
*net
= xp_net(xp
);
2880 struct sk_buff
*skb
;
2882 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
2886 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2889 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_EXPIRE
);
2892 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2894 int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2895 struct net
*net
= xp_net(xp
);
2896 struct xfrm_userpolicy_info
*p
;
2897 struct xfrm_userpolicy_id
*id
;
2898 struct nlmsghdr
*nlh
;
2899 struct sk_buff
*skb
;
2902 headlen
= sizeof(*p
);
2903 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2904 len
+= nla_total_size(headlen
);
2905 headlen
= sizeof(*id
);
2907 len
+= userpolicy_type_attrsize();
2908 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2909 len
+= NLMSG_ALIGN(headlen
);
2911 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2915 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, c
->event
, headlen
, 0);
2920 p
= nlmsg_data(nlh
);
2921 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2922 struct nlattr
*attr
;
2924 id
= nlmsg_data(nlh
);
2925 memset(id
, 0, sizeof(*id
));
2928 id
->index
= xp
->index
;
2930 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2932 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
2940 copy_to_user_policy(xp
, p
, dir
);
2941 err
= copy_to_user_tmpl(xp
, skb
);
2943 err
= copy_to_user_policy_type(xp
->type
, skb
);
2945 err
= xfrm_mark_put(skb
, &xp
->mark
);
2949 nlmsg_end(skb
, nlh
);
2951 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_POLICY
);
2958 static int xfrm_notify_policy_flush(const struct km_event
*c
)
2960 struct net
*net
= c
->net
;
2961 struct nlmsghdr
*nlh
;
2962 struct sk_buff
*skb
;
2965 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
2969 nlh
= nlmsg_put(skb
, c
->portid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
2973 err
= copy_to_user_policy_type(c
->data
.type
, skb
);
2977 nlmsg_end(skb
, nlh
);
2979 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_POLICY
);
2986 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2990 case XFRM_MSG_NEWPOLICY
:
2991 case XFRM_MSG_UPDPOLICY
:
2992 case XFRM_MSG_DELPOLICY
:
2993 return xfrm_notify_policy(xp
, dir
, c
);
2994 case XFRM_MSG_FLUSHPOLICY
:
2995 return xfrm_notify_policy_flush(c
);
2996 case XFRM_MSG_POLEXPIRE
:
2997 return xfrm_exp_policy_notify(xp
, dir
, c
);
2999 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
3007 static inline size_t xfrm_report_msgsize(void)
3009 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
3012 static int build_report(struct sk_buff
*skb
, u8 proto
,
3013 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
3015 struct xfrm_user_report
*ur
;
3016 struct nlmsghdr
*nlh
;
3018 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
3022 ur
= nlmsg_data(nlh
);
3024 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
3027 int err
= nla_put(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
3029 nlmsg_cancel(skb
, nlh
);
3033 nlmsg_end(skb
, nlh
);
3037 static int xfrm_send_report(struct net
*net
, u8 proto
,
3038 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
3040 struct sk_buff
*skb
;
3042 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
3046 if (build_report(skb
, proto
, sel
, addr
) < 0)
3049 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_REPORT
);
3052 static inline size_t xfrm_mapping_msgsize(void)
3054 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
3057 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
3058 xfrm_address_t
*new_saddr
, __be16 new_sport
)
3060 struct xfrm_user_mapping
*um
;
3061 struct nlmsghdr
*nlh
;
3063 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
3067 um
= nlmsg_data(nlh
);
3069 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
3070 um
->id
.spi
= x
->id
.spi
;
3071 um
->id
.family
= x
->props
.family
;
3072 um
->id
.proto
= x
->id
.proto
;
3073 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
3074 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
3075 um
->new_sport
= new_sport
;
3076 um
->old_sport
= x
->encap
->encap_sport
;
3077 um
->reqid
= x
->props
.reqid
;
3079 nlmsg_end(skb
, nlh
);
3083 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
3086 struct net
*net
= xs_net(x
);
3087 struct sk_buff
*skb
;
3089 if (x
->id
.proto
!= IPPROTO_ESP
)
3095 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
3099 if (build_mapping(skb
, x
, ipaddr
, sport
) < 0)
3102 return xfrm_nlmsg_multicast(net
, skb
, 0, XFRMNLGRP_MAPPING
);
3105 static bool xfrm_is_alive(const struct km_event
*c
)
3107 return (bool)xfrm_acquire_is_on(c
->net
);
3110 static struct xfrm_mgr netlink_mgr
= {
3112 .notify
= xfrm_send_state_notify
,
3113 .acquire
= xfrm_send_acquire
,
3114 .compile_policy
= xfrm_compile_policy
,
3115 .notify_policy
= xfrm_send_policy_notify
,
3116 .report
= xfrm_send_report
,
3117 .migrate
= xfrm_send_migrate
,
3118 .new_mapping
= xfrm_send_mapping
,
3119 .is_alive
= xfrm_is_alive
,
3122 static int __net_init
xfrm_user_net_init(struct net
*net
)
3125 struct netlink_kernel_cfg cfg
= {
3126 .groups
= XFRMNLGRP_MAX
,
3127 .input
= xfrm_netlink_rcv
,
3130 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, &cfg
);
3133 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
3134 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
3138 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
3141 list_for_each_entry(net
, net_exit_list
, exit_list
)
3142 RCU_INIT_POINTER(net
->xfrm
.nlsk
, NULL
);
3144 list_for_each_entry(net
, net_exit_list
, exit_list
)
3145 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
3148 static struct pernet_operations xfrm_user_net_ops
= {
3149 .init
= xfrm_user_net_init
,
3150 .exit_batch
= xfrm_user_net_exit
,
3153 static int __init
xfrm_user_init(void)
3157 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
3159 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
3162 rv
= xfrm_register_km(&netlink_mgr
);
3164 unregister_pernet_subsys(&xfrm_user_net_ops
);
3168 static void __exit
xfrm_user_exit(void)
3170 xfrm_unregister_km(&netlink_mgr
);
3171 unregister_pernet_subsys(&xfrm_user_net_ops
);
3174 module_init(xfrm_user_init
);
3175 module_exit(xfrm_user_exit
);
3176 MODULE_LICENSE("GPL");
3177 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);