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 inline int aead_len(struct xfrm_algo_aead
*alg
)
37 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
40 static int verify_one_alg(struct nlattr
**attrs
, enum xfrm_attr_type_t type
)
42 struct nlattr
*rt
= attrs
[type
];
43 struct xfrm_algo
*algp
;
49 if (nla_len(rt
) < xfrm_alg_len(algp
))
62 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
66 static int verify_auth_trunc(struct nlattr
**attrs
)
68 struct nlattr
*rt
= attrs
[XFRMA_ALG_AUTH_TRUNC
];
69 struct xfrm_algo_auth
*algp
;
75 if (nla_len(rt
) < xfrm_alg_auth_len(algp
))
78 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
82 static int verify_aead(struct nlattr
**attrs
)
84 struct nlattr
*rt
= attrs
[XFRMA_ALG_AEAD
];
85 struct xfrm_algo_aead
*algp
;
91 if (nla_len(rt
) < aead_len(algp
))
94 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
98 static void verify_one_addr(struct nlattr
**attrs
, enum xfrm_attr_type_t type
,
99 xfrm_address_t
**addrp
)
101 struct nlattr
*rt
= attrs
[type
];
104 *addrp
= nla_data(rt
);
107 static inline int verify_sec_ctx_len(struct nlattr
**attrs
)
109 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
110 struct xfrm_user_sec_ctx
*uctx
;
116 if (uctx
->len
!= (sizeof(struct xfrm_user_sec_ctx
) + uctx
->ctx_len
))
122 static inline int verify_replay(struct xfrm_usersa_info
*p
,
123 struct nlattr
**attrs
)
125 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_ESN_VAL
];
127 if ((p
->flags
& XFRM_STATE_ESN
) && !rt
)
133 if (p
->id
.proto
!= IPPROTO_ESP
)
136 if (p
->replay_window
!= 0)
142 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
143 struct nlattr
**attrs
)
153 #if IS_ENABLED(CONFIG_IPV6)
165 switch (p
->id
.proto
) {
167 if ((!attrs
[XFRMA_ALG_AUTH
] &&
168 !attrs
[XFRMA_ALG_AUTH_TRUNC
]) ||
169 attrs
[XFRMA_ALG_AEAD
] ||
170 attrs
[XFRMA_ALG_CRYPT
] ||
171 attrs
[XFRMA_ALG_COMP
] ||
177 if (attrs
[XFRMA_ALG_COMP
])
179 if (!attrs
[XFRMA_ALG_AUTH
] &&
180 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
181 !attrs
[XFRMA_ALG_CRYPT
] &&
182 !attrs
[XFRMA_ALG_AEAD
])
184 if ((attrs
[XFRMA_ALG_AUTH
] ||
185 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
186 attrs
[XFRMA_ALG_CRYPT
]) &&
187 attrs
[XFRMA_ALG_AEAD
])
189 if (attrs
[XFRMA_TFCPAD
] &&
190 p
->mode
!= XFRM_MODE_TUNNEL
)
195 if (!attrs
[XFRMA_ALG_COMP
] ||
196 attrs
[XFRMA_ALG_AEAD
] ||
197 attrs
[XFRMA_ALG_AUTH
] ||
198 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
199 attrs
[XFRMA_ALG_CRYPT
] ||
204 #if IS_ENABLED(CONFIG_IPV6)
205 case IPPROTO_DSTOPTS
:
206 case IPPROTO_ROUTING
:
207 if (attrs
[XFRMA_ALG_COMP
] ||
208 attrs
[XFRMA_ALG_AUTH
] ||
209 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
210 attrs
[XFRMA_ALG_AEAD
] ||
211 attrs
[XFRMA_ALG_CRYPT
] ||
212 attrs
[XFRMA_ENCAP
] ||
213 attrs
[XFRMA_SEC_CTX
] ||
214 attrs
[XFRMA_TFCPAD
] ||
215 !attrs
[XFRMA_COADDR
])
224 if ((err
= verify_aead(attrs
)))
226 if ((err
= verify_auth_trunc(attrs
)))
228 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_AUTH
)))
230 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_CRYPT
)))
232 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_COMP
)))
234 if ((err
= verify_sec_ctx_len(attrs
)))
236 if ((err
= verify_replay(p
, attrs
)))
241 case XFRM_MODE_TRANSPORT
:
242 case XFRM_MODE_TUNNEL
:
243 case XFRM_MODE_ROUTEOPTIMIZATION
:
257 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
258 struct xfrm_algo_desc
*(*get_byname
)(const char *, int),
261 struct xfrm_algo
*p
, *ualg
;
262 struct xfrm_algo_desc
*algo
;
267 ualg
= nla_data(rta
);
269 algo
= get_byname(ualg
->alg_name
, 1);
272 *props
= algo
->desc
.sadb_alg_id
;
274 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
278 strcpy(p
->alg_name
, algo
->name
);
283 static int attach_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
286 struct xfrm_algo
*ualg
;
287 struct xfrm_algo_auth
*p
;
288 struct xfrm_algo_desc
*algo
;
293 ualg
= nla_data(rta
);
295 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
298 *props
= algo
->desc
.sadb_alg_id
;
300 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
304 strcpy(p
->alg_name
, algo
->name
);
305 p
->alg_key_len
= ualg
->alg_key_len
;
306 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
307 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
313 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
316 struct xfrm_algo_auth
*p
, *ualg
;
317 struct xfrm_algo_desc
*algo
;
322 ualg
= nla_data(rta
);
324 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
327 if ((ualg
->alg_trunc_len
/ 8) > MAX_AH_AUTH_LEN
||
328 ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
330 *props
= algo
->desc
.sadb_alg_id
;
332 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
336 strcpy(p
->alg_name
, algo
->name
);
337 if (!p
->alg_trunc_len
)
338 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
344 static int attach_aead(struct xfrm_algo_aead
**algpp
, u8
*props
,
347 struct xfrm_algo_aead
*p
, *ualg
;
348 struct xfrm_algo_desc
*algo
;
353 ualg
= nla_data(rta
);
355 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
358 *props
= algo
->desc
.sadb_alg_id
;
360 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
364 strcpy(p
->alg_name
, algo
->name
);
369 static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn
*replay_esn
,
372 struct xfrm_replay_state_esn
*up
;
374 if (!replay_esn
|| !rp
)
379 if (xfrm_replay_state_esn_len(replay_esn
) !=
380 xfrm_replay_state_esn_len(up
))
386 static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn
**replay_esn
,
387 struct xfrm_replay_state_esn
**preplay_esn
,
390 struct xfrm_replay_state_esn
*p
, *pp
, *up
;
397 p
= kmemdup(up
, xfrm_replay_state_esn_len(up
), GFP_KERNEL
);
401 pp
= kmemdup(up
, xfrm_replay_state_esn_len(up
), GFP_KERNEL
);
413 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
418 len
+= sizeof(struct xfrm_user_sec_ctx
);
419 len
+= xfrm_ctx
->ctx_len
;
424 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
426 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
427 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
428 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
429 x
->props
.mode
= p
->mode
;
430 x
->props
.replay_window
= p
->replay_window
;
431 x
->props
.reqid
= p
->reqid
;
432 x
->props
.family
= p
->family
;
433 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
434 x
->props
.flags
= p
->flags
;
436 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
437 x
->sel
.family
= p
->family
;
441 * someday when pfkey also has support, we could have the code
442 * somehow made shareable and move it to xfrm_state.c - JHS
445 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
)
447 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
448 struct nlattr
*re
= attrs
[XFRMA_REPLAY_ESN_VAL
];
449 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
450 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
451 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
454 struct xfrm_replay_state_esn
*replay_esn
;
455 replay_esn
= nla_data(re
);
456 memcpy(x
->replay_esn
, replay_esn
,
457 xfrm_replay_state_esn_len(replay_esn
));
458 memcpy(x
->preplay_esn
, replay_esn
,
459 xfrm_replay_state_esn_len(replay_esn
));
463 struct xfrm_replay_state
*replay
;
464 replay
= nla_data(rp
);
465 memcpy(&x
->replay
, replay
, sizeof(*replay
));
466 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
470 struct xfrm_lifetime_cur
*ltime
;
471 ltime
= nla_data(lt
);
472 x
->curlft
.bytes
= ltime
->bytes
;
473 x
->curlft
.packets
= ltime
->packets
;
474 x
->curlft
.add_time
= ltime
->add_time
;
475 x
->curlft
.use_time
= ltime
->use_time
;
479 x
->replay_maxage
= nla_get_u32(et
);
482 x
->replay_maxdiff
= nla_get_u32(rt
);
485 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
486 struct xfrm_usersa_info
*p
,
487 struct nlattr
**attrs
,
490 struct xfrm_state
*x
= xfrm_state_alloc(net
);
496 copy_from_user_state(x
, p
);
498 if ((err
= attach_aead(&x
->aead
, &x
->props
.ealgo
,
499 attrs
[XFRMA_ALG_AEAD
])))
501 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
502 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
504 if (!x
->props
.aalgo
) {
505 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
506 attrs
[XFRMA_ALG_AUTH
])))
509 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
510 xfrm_ealg_get_byname
,
511 attrs
[XFRMA_ALG_CRYPT
])))
513 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
514 xfrm_calg_get_byname
,
515 attrs
[XFRMA_ALG_COMP
])))
518 if (attrs
[XFRMA_ENCAP
]) {
519 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
520 sizeof(*x
->encap
), GFP_KERNEL
);
521 if (x
->encap
== NULL
)
525 if (attrs
[XFRMA_TFCPAD
])
526 x
->tfcpad
= nla_get_u32(attrs
[XFRMA_TFCPAD
]);
528 if (attrs
[XFRMA_COADDR
]) {
529 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
530 sizeof(*x
->coaddr
), GFP_KERNEL
);
531 if (x
->coaddr
== NULL
)
535 xfrm_mark_get(attrs
, &x
->mark
);
537 err
= __xfrm_init_state(x
, false);
541 if (attrs
[XFRMA_SEC_CTX
] &&
542 security_xfrm_state_alloc(x
, nla_data(attrs
[XFRMA_SEC_CTX
])))
545 if ((err
= xfrm_alloc_replay_state_esn(&x
->replay_esn
, &x
->preplay_esn
,
546 attrs
[XFRMA_REPLAY_ESN_VAL
])))
550 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
551 /* sysctl_xfrm_aevent_etime is in 100ms units */
552 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
554 if ((err
= xfrm_init_replay(x
)))
557 /* override default values from above */
558 xfrm_update_ae_params(x
, attrs
);
563 x
->km
.state
= XFRM_STATE_DEAD
;
570 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
571 struct nlattr
**attrs
)
573 struct net
*net
= sock_net(skb
->sk
);
574 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
575 struct xfrm_state
*x
;
578 uid_t loginuid
= audit_get_loginuid(current
);
579 u32 sessionid
= audit_get_sessionid(current
);
582 err
= verify_newsa_info(p
, attrs
);
586 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
591 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
592 err
= xfrm_state_add(x
);
594 err
= xfrm_state_update(x
);
596 security_task_getsecid(current
, &sid
);
597 xfrm_audit_state_add(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
600 x
->km
.state
= XFRM_STATE_DEAD
;
605 c
.seq
= nlh
->nlmsg_seq
;
606 c
.pid
= nlh
->nlmsg_pid
;
607 c
.event
= nlh
->nlmsg_type
;
609 km_state_notify(x
, &c
);
615 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
616 struct xfrm_usersa_id
*p
,
617 struct nlattr
**attrs
,
620 struct xfrm_state
*x
= NULL
;
623 u32 mark
= xfrm_mark_get(attrs
, &m
);
625 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
627 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
629 xfrm_address_t
*saddr
= NULL
;
631 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
638 x
= xfrm_state_lookup_byaddr(net
, mark
,
640 p
->proto
, p
->family
);
649 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
650 struct nlattr
**attrs
)
652 struct net
*net
= sock_net(skb
->sk
);
653 struct xfrm_state
*x
;
656 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
657 uid_t loginuid
= audit_get_loginuid(current
);
658 u32 sessionid
= audit_get_sessionid(current
);
661 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
665 if ((err
= security_xfrm_state_delete(x
)) != 0)
668 if (xfrm_state_kern(x
)) {
673 err
= xfrm_state_delete(x
);
678 c
.seq
= nlh
->nlmsg_seq
;
679 c
.pid
= nlh
->nlmsg_pid
;
680 c
.event
= nlh
->nlmsg_type
;
681 km_state_notify(x
, &c
);
684 security_task_getsecid(current
, &sid
);
685 xfrm_audit_state_delete(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
690 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
692 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
693 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
694 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
695 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
696 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
697 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
698 p
->mode
= x
->props
.mode
;
699 p
->replay_window
= x
->props
.replay_window
;
700 p
->reqid
= x
->props
.reqid
;
701 p
->family
= x
->props
.family
;
702 p
->flags
= x
->props
.flags
;
706 struct xfrm_dump_info
{
707 struct sk_buff
*in_skb
;
708 struct sk_buff
*out_skb
;
713 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
715 struct xfrm_user_sec_ctx
*uctx
;
717 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
719 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
723 uctx
= nla_data(attr
);
724 uctx
->exttype
= XFRMA_SEC_CTX
;
725 uctx
->len
= ctx_size
;
726 uctx
->ctx_doi
= s
->ctx_doi
;
727 uctx
->ctx_alg
= s
->ctx_alg
;
728 uctx
->ctx_len
= s
->ctx_len
;
729 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
734 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
736 struct xfrm_algo
*algo
;
739 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
740 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
744 algo
= nla_data(nla
);
745 strcpy(algo
->alg_name
, auth
->alg_name
);
746 memcpy(algo
->alg_key
, auth
->alg_key
, (auth
->alg_key_len
+ 7) / 8);
747 algo
->alg_key_len
= auth
->alg_key_len
;
752 /* Don't change this without updating xfrm_sa_len! */
753 static int copy_to_user_state_extra(struct xfrm_state
*x
,
754 struct xfrm_usersa_info
*p
,
759 copy_to_user_state(x
, p
);
762 ret
= nla_put(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
767 ret
= nla_put_u64(skb
, XFRMA_LASTUSED
, x
->lastused
);
772 ret
= nla_put(skb
, XFRMA_ALG_AEAD
, aead_len(x
->aead
), x
->aead
);
777 ret
= copy_to_user_auth(x
->aalg
, skb
);
779 ret
= nla_put(skb
, XFRMA_ALG_AUTH_TRUNC
,
780 xfrm_alg_auth_len(x
->aalg
), x
->aalg
);
785 ret
= nla_put(skb
, XFRMA_ALG_CRYPT
, xfrm_alg_len(x
->ealg
), x
->ealg
);
790 ret
= nla_put(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
795 ret
= nla_put(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
800 ret
= nla_put_u32(skb
, XFRMA_TFCPAD
, x
->tfcpad
);
804 ret
= xfrm_mark_put(skb
, &x
->mark
);
808 ret
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
809 xfrm_replay_state_esn_len(x
->replay_esn
),
815 ret
= copy_sec_ctx(x
->security
, skb
);
820 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
822 struct xfrm_dump_info
*sp
= ptr
;
823 struct sk_buff
*in_skb
= sp
->in_skb
;
824 struct sk_buff
*skb
= sp
->out_skb
;
825 struct xfrm_usersa_info
*p
;
826 struct nlmsghdr
*nlh
;
829 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
830 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
836 err
= copy_to_user_state_extra(x
, p
, skb
);
838 nlmsg_cancel(skb
, nlh
);
845 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
847 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
848 xfrm_state_walk_done(walk
);
852 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
854 struct net
*net
= sock_net(skb
->sk
);
855 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
856 struct xfrm_dump_info info
;
858 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
859 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
861 info
.in_skb
= cb
->skb
;
863 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
864 info
.nlmsg_flags
= NLM_F_MULTI
;
868 xfrm_state_walk_init(walk
, 0);
871 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
876 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
877 struct xfrm_state
*x
, u32 seq
)
879 struct xfrm_dump_info info
;
882 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
884 return ERR_PTR(-ENOMEM
);
886 info
.in_skb
= in_skb
;
888 info
.nlmsg_seq
= seq
;
889 info
.nlmsg_flags
= 0;
891 if (dump_one_state(x
, 0, &info
)) {
899 static inline size_t xfrm_spdinfo_msgsize(void)
901 return NLMSG_ALIGN(4)
902 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
903 + nla_total_size(sizeof(struct xfrmu_spdhinfo
));
906 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
907 u32 pid
, u32 seq
, u32 flags
)
909 struct xfrmk_spdinfo si
;
910 struct xfrmu_spdinfo spc
;
911 struct xfrmu_spdhinfo sph
;
912 struct nlmsghdr
*nlh
;
916 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
917 if (nlh
== NULL
) /* shouldn't really happen ... */
922 xfrm_spd_getinfo(net
, &si
);
923 spc
.incnt
= si
.incnt
;
924 spc
.outcnt
= si
.outcnt
;
925 spc
.fwdcnt
= si
.fwdcnt
;
926 spc
.inscnt
= si
.inscnt
;
927 spc
.outscnt
= si
.outscnt
;
928 spc
.fwdscnt
= si
.fwdscnt
;
929 sph
.spdhcnt
= si
.spdhcnt
;
930 sph
.spdhmcnt
= si
.spdhmcnt
;
932 err
= nla_put(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
934 err
= nla_put(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
936 nlmsg_cancel(skb
, nlh
);
940 return nlmsg_end(skb
, nlh
);
943 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
944 struct nlattr
**attrs
)
946 struct net
*net
= sock_net(skb
->sk
);
947 struct sk_buff
*r_skb
;
948 u32
*flags
= nlmsg_data(nlh
);
949 u32 spid
= NETLINK_CB(skb
).pid
;
950 u32 seq
= nlh
->nlmsg_seq
;
952 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
956 if (build_spdinfo(r_skb
, net
, spid
, seq
, *flags
) < 0)
959 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, spid
);
962 static inline size_t xfrm_sadinfo_msgsize(void)
964 return NLMSG_ALIGN(4)
965 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
966 + nla_total_size(4); /* XFRMA_SAD_CNT */
969 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
970 u32 pid
, u32 seq
, u32 flags
)
972 struct xfrmk_sadinfo si
;
973 struct xfrmu_sadhinfo sh
;
974 struct nlmsghdr
*nlh
;
978 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
979 if (nlh
== NULL
) /* shouldn't really happen ... */
984 xfrm_sad_getinfo(net
, &si
);
986 sh
.sadhmcnt
= si
.sadhmcnt
;
987 sh
.sadhcnt
= si
.sadhcnt
;
989 err
= nla_put_u32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
991 err
= nla_put(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
993 nlmsg_cancel(skb
, nlh
);
997 return nlmsg_end(skb
, nlh
);
1000 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1001 struct nlattr
**attrs
)
1003 struct net
*net
= sock_net(skb
->sk
);
1004 struct sk_buff
*r_skb
;
1005 u32
*flags
= nlmsg_data(nlh
);
1006 u32 spid
= NETLINK_CB(skb
).pid
;
1007 u32 seq
= nlh
->nlmsg_seq
;
1009 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
1013 if (build_sadinfo(r_skb
, net
, spid
, seq
, *flags
) < 0)
1016 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, spid
);
1019 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1020 struct nlattr
**attrs
)
1022 struct net
*net
= sock_net(skb
->sk
);
1023 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
1024 struct xfrm_state
*x
;
1025 struct sk_buff
*resp_skb
;
1028 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
1032 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1033 if (IS_ERR(resp_skb
)) {
1034 err
= PTR_ERR(resp_skb
);
1036 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).pid
);
1043 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
1045 switch (p
->info
.id
.proto
) {
1051 /* IPCOMP spi is 16-bits. */
1052 if (p
->max
>= 0x10000)
1060 if (p
->min
> p
->max
)
1066 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1067 struct nlattr
**attrs
)
1069 struct net
*net
= sock_net(skb
->sk
);
1070 struct xfrm_state
*x
;
1071 struct xfrm_userspi_info
*p
;
1072 struct sk_buff
*resp_skb
;
1073 xfrm_address_t
*daddr
;
1079 p
= nlmsg_data(nlh
);
1080 err
= verify_userspi_info(p
);
1084 family
= p
->info
.family
;
1085 daddr
= &p
->info
.id
.daddr
;
1089 mark
= xfrm_mark_get(attrs
, &m
);
1091 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
1092 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
1099 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
1100 p
->info
.id
.proto
, daddr
,
1107 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
1111 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1112 if (IS_ERR(resp_skb
)) {
1113 err
= PTR_ERR(resp_skb
);
1117 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).pid
);
1125 static int verify_policy_dir(u8 dir
)
1128 case XFRM_POLICY_IN
:
1129 case XFRM_POLICY_OUT
:
1130 case XFRM_POLICY_FWD
:
1140 static int verify_policy_type(u8 type
)
1143 case XFRM_POLICY_TYPE_MAIN
:
1144 #ifdef CONFIG_XFRM_SUB_POLICY
1145 case XFRM_POLICY_TYPE_SUB
:
1156 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1159 case XFRM_SHARE_ANY
:
1160 case XFRM_SHARE_SESSION
:
1161 case XFRM_SHARE_USER
:
1162 case XFRM_SHARE_UNIQUE
:
1169 switch (p
->action
) {
1170 case XFRM_POLICY_ALLOW
:
1171 case XFRM_POLICY_BLOCK
:
1178 switch (p
->sel
.family
) {
1183 #if IS_ENABLED(CONFIG_IPV6)
1186 return -EAFNOSUPPORT
;
1193 return verify_policy_dir(p
->dir
);
1196 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1198 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1199 struct xfrm_user_sec_ctx
*uctx
;
1204 uctx
= nla_data(rt
);
1205 return security_xfrm_policy_alloc(&pol
->security
, uctx
);
1208 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1214 for (i
= 0; i
< nr
; i
++, ut
++) {
1215 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1217 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1218 memcpy(&t
->saddr
, &ut
->saddr
,
1219 sizeof(xfrm_address_t
));
1220 t
->reqid
= ut
->reqid
;
1222 t
->share
= ut
->share
;
1223 t
->optional
= ut
->optional
;
1224 t
->aalgos
= ut
->aalgos
;
1225 t
->ealgos
= ut
->ealgos
;
1226 t
->calgos
= ut
->calgos
;
1227 /* If all masks are ~0, then we allow all algorithms. */
1228 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1229 t
->encap_family
= ut
->family
;
1233 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1237 if (nr
> XFRM_MAX_DEPTH
)
1240 for (i
= 0; i
< nr
; i
++) {
1241 /* We never validated the ut->family value, so many
1242 * applications simply leave it at zero. The check was
1243 * never made and ut->family was ignored because all
1244 * templates could be assumed to have the same family as
1245 * the policy itself. Now that we will have ipv4-in-ipv6
1246 * and ipv6-in-ipv4 tunnels, this is no longer true.
1249 ut
[i
].family
= family
;
1251 switch (ut
[i
].family
) {
1254 #if IS_ENABLED(CONFIG_IPV6)
1266 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1268 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1273 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1274 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1277 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1281 copy_templates(pol
, utmpl
, nr
);
1286 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1288 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1289 struct xfrm_userpolicy_type
*upt
;
1290 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1298 err
= verify_policy_type(type
);
1306 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1308 xp
->priority
= p
->priority
;
1309 xp
->index
= p
->index
;
1310 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1311 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1312 xp
->action
= p
->action
;
1313 xp
->flags
= p
->flags
;
1314 xp
->family
= p
->sel
.family
;
1315 /* XXX xp->share = p->share; */
1318 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1320 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1321 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1322 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1323 p
->priority
= xp
->priority
;
1324 p
->index
= xp
->index
;
1325 p
->sel
.family
= xp
->family
;
1327 p
->action
= xp
->action
;
1328 p
->flags
= xp
->flags
;
1329 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1332 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1334 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1342 copy_from_user_policy(xp
, p
);
1344 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1348 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1349 err
= copy_from_user_sec_ctx(xp
, attrs
);
1353 xfrm_mark_get(attrs
, &xp
->mark
);
1359 xfrm_policy_destroy(xp
);
1363 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1364 struct nlattr
**attrs
)
1366 struct net
*net
= sock_net(skb
->sk
);
1367 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1368 struct xfrm_policy
*xp
;
1372 uid_t loginuid
= audit_get_loginuid(current
);
1373 u32 sessionid
= audit_get_sessionid(current
);
1376 err
= verify_newpolicy_info(p
);
1379 err
= verify_sec_ctx_len(attrs
);
1383 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1387 /* shouldn't excl be based on nlh flags??
1388 * Aha! this is anti-netlink really i.e more pfkey derived
1389 * in netlink excl is a flag and you wouldnt need
1390 * a type XFRM_MSG_UPDPOLICY - JHS */
1391 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1392 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1393 security_task_getsecid(current
, &sid
);
1394 xfrm_audit_policy_add(xp
, err
? 0 : 1, loginuid
, sessionid
, sid
);
1397 security_xfrm_policy_free(xp
->security
);
1402 c
.event
= nlh
->nlmsg_type
;
1403 c
.seq
= nlh
->nlmsg_seq
;
1404 c
.pid
= nlh
->nlmsg_pid
;
1405 km_policy_notify(xp
, p
->dir
, &c
);
1412 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1414 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1417 if (xp
->xfrm_nr
== 0)
1420 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1421 struct xfrm_user_tmpl
*up
= &vec
[i
];
1422 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1424 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1425 up
->family
= kp
->encap_family
;
1426 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1427 up
->reqid
= kp
->reqid
;
1428 up
->mode
= kp
->mode
;
1429 up
->share
= kp
->share
;
1430 up
->optional
= kp
->optional
;
1431 up
->aalgos
= kp
->aalgos
;
1432 up
->ealgos
= kp
->ealgos
;
1433 up
->calgos
= kp
->calgos
;
1436 return nla_put(skb
, XFRMA_TMPL
,
1437 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1440 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1443 return copy_sec_ctx(x
->security
, skb
);
1448 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1451 return copy_sec_ctx(xp
->security
, skb
);
1454 static inline size_t userpolicy_type_attrsize(void)
1456 #ifdef CONFIG_XFRM_SUB_POLICY
1457 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1463 #ifdef CONFIG_XFRM_SUB_POLICY
1464 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1466 struct xfrm_userpolicy_type upt
= {
1470 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1474 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1480 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1482 struct xfrm_dump_info
*sp
= ptr
;
1483 struct xfrm_userpolicy_info
*p
;
1484 struct sk_buff
*in_skb
= sp
->in_skb
;
1485 struct sk_buff
*skb
= sp
->out_skb
;
1486 struct nlmsghdr
*nlh
;
1489 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
1490 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1494 p
= nlmsg_data(nlh
);
1495 copy_to_user_policy(xp
, p
, dir
);
1496 err
= copy_to_user_tmpl(xp
, skb
);
1498 err
= copy_to_user_sec_ctx(xp
, skb
);
1500 err
= copy_to_user_policy_type(xp
->type
, skb
);
1502 err
= xfrm_mark_put(skb
, &xp
->mark
);
1504 nlmsg_cancel(skb
, nlh
);
1507 nlmsg_end(skb
, nlh
);
1511 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1513 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1515 xfrm_policy_walk_done(walk
);
1519 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1521 struct net
*net
= sock_net(skb
->sk
);
1522 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1523 struct xfrm_dump_info info
;
1525 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk
) >
1526 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1528 info
.in_skb
= cb
->skb
;
1530 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1531 info
.nlmsg_flags
= NLM_F_MULTI
;
1535 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1538 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1543 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1544 struct xfrm_policy
*xp
,
1547 struct xfrm_dump_info info
;
1548 struct sk_buff
*skb
;
1550 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1552 return ERR_PTR(-ENOMEM
);
1554 info
.in_skb
= in_skb
;
1556 info
.nlmsg_seq
= seq
;
1557 info
.nlmsg_flags
= 0;
1559 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
1567 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1568 struct nlattr
**attrs
)
1570 struct net
*net
= sock_net(skb
->sk
);
1571 struct xfrm_policy
*xp
;
1572 struct xfrm_userpolicy_id
*p
;
1573 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1578 u32 mark
= xfrm_mark_get(attrs
, &m
);
1580 p
= nlmsg_data(nlh
);
1581 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1583 err
= copy_from_user_policy_type(&type
, attrs
);
1587 err
= verify_policy_dir(p
->dir
);
1592 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, delete, &err
);
1594 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1595 struct xfrm_sec_ctx
*ctx
;
1597 err
= verify_sec_ctx_len(attrs
);
1603 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1605 err
= security_xfrm_policy_alloc(&ctx
, uctx
);
1609 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
, &p
->sel
,
1611 security_xfrm_policy_free(ctx
);
1617 struct sk_buff
*resp_skb
;
1619 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1620 if (IS_ERR(resp_skb
)) {
1621 err
= PTR_ERR(resp_skb
);
1623 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
1624 NETLINK_CB(skb
).pid
);
1627 uid_t loginuid
= audit_get_loginuid(current
);
1628 u32 sessionid
= audit_get_sessionid(current
);
1631 security_task_getsecid(current
, &sid
);
1632 xfrm_audit_policy_delete(xp
, err
? 0 : 1, loginuid
, sessionid
,
1638 c
.data
.byid
= p
->index
;
1639 c
.event
= nlh
->nlmsg_type
;
1640 c
.seq
= nlh
->nlmsg_seq
;
1641 c
.pid
= nlh
->nlmsg_pid
;
1642 km_policy_notify(xp
, p
->dir
, &c
);
1650 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1651 struct nlattr
**attrs
)
1653 struct net
*net
= sock_net(skb
->sk
);
1655 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1656 struct xfrm_audit audit_info
;
1659 audit_info
.loginuid
= audit_get_loginuid(current
);
1660 audit_info
.sessionid
= audit_get_sessionid(current
);
1661 security_task_getsecid(current
, &audit_info
.secid
);
1662 err
= xfrm_state_flush(net
, p
->proto
, &audit_info
);
1664 if (err
== -ESRCH
) /* empty table */
1668 c
.data
.proto
= p
->proto
;
1669 c
.event
= nlh
->nlmsg_type
;
1670 c
.seq
= nlh
->nlmsg_seq
;
1671 c
.pid
= nlh
->nlmsg_pid
;
1673 km_state_notify(NULL
, &c
);
1678 static inline size_t xfrm_aevent_msgsize(struct xfrm_state
*x
)
1680 size_t replay_size
= x
->replay_esn
?
1681 xfrm_replay_state_esn_len(x
->replay_esn
) :
1682 sizeof(struct xfrm_replay_state
);
1684 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
1685 + nla_total_size(replay_size
)
1686 + nla_total_size(sizeof(struct xfrm_lifetime_cur
))
1687 + nla_total_size(sizeof(struct xfrm_mark
))
1688 + nla_total_size(4) /* XFRM_AE_RTHR */
1689 + nla_total_size(4); /* XFRM_AE_ETHR */
1692 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
1694 struct xfrm_aevent_id
*id
;
1695 struct nlmsghdr
*nlh
;
1698 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1702 id
= nlmsg_data(nlh
);
1703 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
,sizeof(x
->id
.daddr
));
1704 id
->sa_id
.spi
= x
->id
.spi
;
1705 id
->sa_id
.family
= x
->props
.family
;
1706 id
->sa_id
.proto
= x
->id
.proto
;
1707 memcpy(&id
->saddr
, &x
->props
.saddr
,sizeof(x
->props
.saddr
));
1708 id
->reqid
= x
->props
.reqid
;
1709 id
->flags
= c
->data
.aevent
;
1711 if (x
->replay_esn
) {
1712 err
= nla_put(skb
, XFRMA_REPLAY_ESN_VAL
,
1713 xfrm_replay_state_esn_len(x
->replay_esn
),
1716 err
= nla_put(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
),
1721 err
= nla_put(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
);
1725 if (id
->flags
& XFRM_AE_RTHR
) {
1726 err
= nla_put_u32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
1730 if (id
->flags
& XFRM_AE_ETHR
) {
1731 err
= nla_put_u32(skb
, XFRMA_ETIMER_THRESH
,
1732 x
->replay_maxage
* 10 / HZ
);
1736 err
= xfrm_mark_put(skb
, &x
->mark
);
1740 return nlmsg_end(skb
, nlh
);
1743 nlmsg_cancel(skb
, nlh
);
1747 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1748 struct nlattr
**attrs
)
1750 struct net
*net
= sock_net(skb
->sk
);
1751 struct xfrm_state
*x
;
1752 struct sk_buff
*r_skb
;
1757 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1758 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1760 mark
= xfrm_mark_get(attrs
, &m
);
1762 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1766 r_skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
1767 if (r_skb
== NULL
) {
1773 * XXX: is this lock really needed - none of the other
1774 * gets lock (the concern is things getting updated
1775 * while we are still reading) - jhs
1777 spin_lock_bh(&x
->lock
);
1778 c
.data
.aevent
= p
->flags
;
1779 c
.seq
= nlh
->nlmsg_seq
;
1780 c
.pid
= nlh
->nlmsg_pid
;
1782 if (build_aevent(r_skb
, x
, &c
) < 0)
1784 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).pid
);
1785 spin_unlock_bh(&x
->lock
);
1790 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1791 struct nlattr
**attrs
)
1793 struct net
*net
= sock_net(skb
->sk
);
1794 struct xfrm_state
*x
;
1799 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1800 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
1801 struct nlattr
*re
= attrs
[XFRMA_REPLAY_ESN_VAL
];
1802 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
1804 if (!lt
&& !rp
&& !re
)
1807 /* pedantic mode - thou shalt sayeth replaceth */
1808 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1811 mark
= xfrm_mark_get(attrs
, &m
);
1813 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1817 if (x
->km
.state
!= XFRM_STATE_VALID
)
1820 err
= xfrm_replay_verify_len(x
->replay_esn
, rp
);
1824 spin_lock_bh(&x
->lock
);
1825 xfrm_update_ae_params(x
, attrs
);
1826 spin_unlock_bh(&x
->lock
);
1828 c
.event
= nlh
->nlmsg_type
;
1829 c
.seq
= nlh
->nlmsg_seq
;
1830 c
.pid
= nlh
->nlmsg_pid
;
1831 c
.data
.aevent
= XFRM_AE_CU
;
1832 km_state_notify(x
, &c
);
1839 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1840 struct nlattr
**attrs
)
1842 struct net
*net
= sock_net(skb
->sk
);
1844 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1846 struct xfrm_audit audit_info
;
1848 err
= copy_from_user_policy_type(&type
, attrs
);
1852 audit_info
.loginuid
= audit_get_loginuid(current
);
1853 audit_info
.sessionid
= audit_get_sessionid(current
);
1854 security_task_getsecid(current
, &audit_info
.secid
);
1855 err
= xfrm_policy_flush(net
, type
, &audit_info
);
1857 if (err
== -ESRCH
) /* empty table */
1863 c
.event
= nlh
->nlmsg_type
;
1864 c
.seq
= nlh
->nlmsg_seq
;
1865 c
.pid
= nlh
->nlmsg_pid
;
1867 km_policy_notify(NULL
, 0, &c
);
1871 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1872 struct nlattr
**attrs
)
1874 struct net
*net
= sock_net(skb
->sk
);
1875 struct xfrm_policy
*xp
;
1876 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
1877 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1878 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1881 u32 mark
= xfrm_mark_get(attrs
, &m
);
1883 err
= copy_from_user_policy_type(&type
, attrs
);
1887 err
= verify_policy_dir(p
->dir
);
1892 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, 0, &err
);
1894 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1895 struct xfrm_sec_ctx
*ctx
;
1897 err
= verify_sec_ctx_len(attrs
);
1903 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1905 err
= security_xfrm_policy_alloc(&ctx
, uctx
);
1909 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
,
1910 &p
->sel
, ctx
, 0, &err
);
1911 security_xfrm_policy_free(ctx
);
1916 if (unlikely(xp
->walk
.dead
))
1921 uid_t loginuid
= audit_get_loginuid(current
);
1922 u32 sessionid
= audit_get_sessionid(current
);
1925 security_task_getsecid(current
, &sid
);
1926 xfrm_policy_delete(xp
, p
->dir
);
1927 xfrm_audit_policy_delete(xp
, 1, loginuid
, sessionid
, sid
);
1930 // reset the timers here?
1931 WARN(1, "Dont know what to do with soft policy expire\n");
1933 km_policy_expired(xp
, p
->dir
, up
->hard
, current
->pid
);
1940 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1941 struct nlattr
**attrs
)
1943 struct net
*net
= sock_net(skb
->sk
);
1944 struct xfrm_state
*x
;
1946 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
1947 struct xfrm_usersa_info
*p
= &ue
->state
;
1949 u32 mark
= xfrm_mark_get(attrs
, &m
);
1951 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
1957 spin_lock_bh(&x
->lock
);
1959 if (x
->km
.state
!= XFRM_STATE_VALID
)
1961 km_state_expired(x
, ue
->hard
, current
->pid
);
1964 uid_t loginuid
= audit_get_loginuid(current
);
1965 u32 sessionid
= audit_get_sessionid(current
);
1968 security_task_getsecid(current
, &sid
);
1969 __xfrm_state_delete(x
);
1970 xfrm_audit_state_delete(x
, 1, loginuid
, sessionid
, sid
);
1974 spin_unlock_bh(&x
->lock
);
1979 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1980 struct nlattr
**attrs
)
1982 struct net
*net
= sock_net(skb
->sk
);
1983 struct xfrm_policy
*xp
;
1984 struct xfrm_user_tmpl
*ut
;
1986 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1987 struct xfrm_mark mark
;
1989 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
1990 struct xfrm_state
*x
= xfrm_state_alloc(net
);
1996 xfrm_mark_get(attrs
, &mark
);
1998 err
= verify_newpolicy_info(&ua
->policy
);
2003 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
2007 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
2008 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
2009 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
2010 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
2011 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
2013 /* extract the templates and for each call km_key */
2014 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
2015 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
2016 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
2017 x
->props
.mode
= t
->mode
;
2018 x
->props
.reqid
= t
->reqid
;
2019 x
->props
.family
= ut
->family
;
2020 t
->aalgos
= ua
->aalgos
;
2021 t
->ealgos
= ua
->ealgos
;
2022 t
->calgos
= ua
->calgos
;
2023 err
= km_query(x
, t
, xp
);
2033 WARN(1, "BAD policy passed\n");
2040 #ifdef CONFIG_XFRM_MIGRATE
2041 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
2042 struct xfrm_kmaddress
*k
,
2043 struct nlattr
**attrs
, int *num
)
2045 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
2046 struct xfrm_user_migrate
*um
;
2050 struct xfrm_user_kmaddress
*uk
;
2052 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
2053 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
2054 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
2055 k
->family
= uk
->family
;
2056 k
->reserved
= uk
->reserved
;
2060 num_migrate
= nla_len(rt
) / sizeof(*um
);
2062 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
2065 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
2066 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
2067 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
2068 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
2069 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
2071 ma
->proto
= um
->proto
;
2072 ma
->mode
= um
->mode
;
2073 ma
->reqid
= um
->reqid
;
2075 ma
->old_family
= um
->old_family
;
2076 ma
->new_family
= um
->new_family
;
2083 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2084 struct nlattr
**attrs
)
2086 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
2087 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
2088 struct xfrm_kmaddress km
, *kmp
;
2093 if (attrs
[XFRMA_MIGRATE
] == NULL
)
2096 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
2098 err
= copy_from_user_policy_type(&type
, attrs
);
2102 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
2109 xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
);
2114 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
2115 struct nlattr
**attrs
)
2117 return -ENOPROTOOPT
;
2121 #ifdef CONFIG_XFRM_MIGRATE
2122 static int copy_to_user_migrate(const struct xfrm_migrate
*m
, struct sk_buff
*skb
)
2124 struct xfrm_user_migrate um
;
2126 memset(&um
, 0, sizeof(um
));
2127 um
.proto
= m
->proto
;
2129 um
.reqid
= m
->reqid
;
2130 um
.old_family
= m
->old_family
;
2131 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
2132 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
2133 um
.new_family
= m
->new_family
;
2134 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
2135 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
2137 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
2140 static int copy_to_user_kmaddress(const struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
2142 struct xfrm_user_kmaddress uk
;
2144 memset(&uk
, 0, sizeof(uk
));
2145 uk
.family
= k
->family
;
2146 uk
.reserved
= k
->reserved
;
2147 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
2148 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
2150 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2153 static inline size_t xfrm_migrate_msgsize(int num_migrate
, int with_kma
)
2155 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2156 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2157 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2158 + userpolicy_type_attrsize();
2161 static int build_migrate(struct sk_buff
*skb
, const struct xfrm_migrate
*m
,
2162 int num_migrate
, const struct xfrm_kmaddress
*k
,
2163 const struct xfrm_selector
*sel
, u8 dir
, u8 type
)
2165 const struct xfrm_migrate
*mp
;
2166 struct xfrm_userpolicy_id
*pol_id
;
2167 struct nlmsghdr
*nlh
;
2170 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2174 pol_id
= nlmsg_data(nlh
);
2175 /* copy data from selector, dir, and type to the pol_id */
2176 memset(pol_id
, 0, sizeof(*pol_id
));
2177 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2181 err
= copy_to_user_kmaddress(k
, skb
);
2185 err
= copy_to_user_policy_type(type
, skb
);
2188 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2189 err
= copy_to_user_migrate(mp
, skb
);
2194 return nlmsg_end(skb
, nlh
);
2197 nlmsg_cancel(skb
, nlh
);
2201 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2202 const struct xfrm_migrate
*m
, int num_migrate
,
2203 const struct xfrm_kmaddress
*k
)
2205 struct net
*net
= &init_net
;
2206 struct sk_buff
*skb
;
2208 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
), GFP_ATOMIC
);
2213 if (build_migrate(skb
, m
, num_migrate
, k
, sel
, dir
, type
) < 0)
2216 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MIGRATE
, GFP_ATOMIC
);
2219 static int xfrm_send_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2220 const struct xfrm_migrate
*m
, int num_migrate
,
2221 const struct xfrm_kmaddress
*k
)
2223 return -ENOPROTOOPT
;
2227 #define XMSGSIZE(type) sizeof(struct type)
2229 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2230 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2231 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2232 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2233 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2234 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2235 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2236 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2237 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2238 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2239 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2240 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2241 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2242 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2243 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2244 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2245 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2246 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2247 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2248 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2249 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2254 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2255 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2256 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2257 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2258 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2259 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2260 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2261 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2262 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2263 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2264 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2265 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2266 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2267 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2268 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2269 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2270 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2271 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2272 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2273 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2274 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2275 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2276 [XFRMA_TFCPAD
] = { .type
= NLA_U32
},
2277 [XFRMA_REPLAY_ESN_VAL
] = { .len
= sizeof(struct xfrm_replay_state_esn
) },
2280 static struct xfrm_link
{
2281 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2282 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2283 int (*done
)(struct netlink_callback
*);
2284 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2285 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2286 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2287 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2288 .dump
= xfrm_dump_sa
,
2289 .done
= xfrm_dump_sa_done
},
2290 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2291 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2292 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2293 .dump
= xfrm_dump_policy
,
2294 .done
= xfrm_dump_policy_done
},
2295 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2296 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2297 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2298 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2299 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2300 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2301 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2302 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2303 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2304 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2305 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2306 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2307 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2310 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2312 struct net
*net
= sock_net(skb
->sk
);
2313 struct nlattr
*attrs
[XFRMA_MAX
+1];
2314 struct xfrm_link
*link
;
2317 type
= nlh
->nlmsg_type
;
2318 if (type
> XFRM_MSG_MAX
)
2321 type
-= XFRM_MSG_BASE
;
2322 link
= &xfrm_dispatch
[type
];
2324 /* All operations require privileges, even GET */
2325 if (!capable(CAP_NET_ADMIN
))
2328 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2329 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2330 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2331 if (link
->dump
== NULL
)
2335 struct netlink_dump_control c
= {
2339 return netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, &c
);
2343 err
= nlmsg_parse(nlh
, xfrm_msg_min
[type
], attrs
, XFRMA_MAX
,
2348 if (link
->doit
== NULL
)
2351 return link
->doit(skb
, nlh
, attrs
);
2354 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2356 mutex_lock(&xfrm_cfg_mutex
);
2357 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2358 mutex_unlock(&xfrm_cfg_mutex
);
2361 static inline size_t xfrm_expire_msgsize(void)
2363 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2364 + nla_total_size(sizeof(struct xfrm_mark
));
2367 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, const struct km_event
*c
)
2369 struct xfrm_user_expire
*ue
;
2370 struct nlmsghdr
*nlh
;
2373 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2377 ue
= nlmsg_data(nlh
);
2378 copy_to_user_state(x
, &ue
->state
);
2379 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2381 err
= xfrm_mark_put(skb
, &x
->mark
);
2385 return nlmsg_end(skb
, nlh
);
2388 static int xfrm_exp_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2390 struct net
*net
= xs_net(x
);
2391 struct sk_buff
*skb
;
2393 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2397 if (build_expire(skb
, x
, c
) < 0) {
2402 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2405 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2407 struct net
*net
= xs_net(x
);
2408 struct sk_buff
*skb
;
2410 skb
= nlmsg_new(xfrm_aevent_msgsize(x
), GFP_ATOMIC
);
2414 if (build_aevent(skb
, x
, c
) < 0)
2417 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
2420 static int xfrm_notify_sa_flush(const struct km_event
*c
)
2422 struct net
*net
= c
->net
;
2423 struct xfrm_usersa_flush
*p
;
2424 struct nlmsghdr
*nlh
;
2425 struct sk_buff
*skb
;
2426 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2428 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2432 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2438 p
= nlmsg_data(nlh
);
2439 p
->proto
= c
->data
.proto
;
2441 nlmsg_end(skb
, nlh
);
2443 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2446 static inline size_t xfrm_sa_len(struct xfrm_state
*x
)
2450 l
+= nla_total_size(aead_len(x
->aead
));
2452 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2453 (x
->aalg
->alg_key_len
+ 7) / 8);
2454 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2457 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
2459 l
+= nla_total_size(sizeof(*x
->calg
));
2461 l
+= nla_total_size(sizeof(*x
->encap
));
2463 l
+= nla_total_size(sizeof(x
->tfcpad
));
2465 l
+= nla_total_size(xfrm_replay_state_esn_len(x
->replay_esn
));
2467 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
2468 x
->security
->ctx_len
);
2470 l
+= nla_total_size(sizeof(*x
->coaddr
));
2472 /* Must count x->lastused as it may become non-zero behind our back. */
2473 l
+= nla_total_size(sizeof(u64
));
2478 static int xfrm_notify_sa(struct xfrm_state
*x
, const struct km_event
*c
)
2480 struct net
*net
= xs_net(x
);
2481 struct xfrm_usersa_info
*p
;
2482 struct xfrm_usersa_id
*id
;
2483 struct nlmsghdr
*nlh
;
2484 struct sk_buff
*skb
;
2485 int len
= xfrm_sa_len(x
);
2488 headlen
= sizeof(*p
);
2489 if (c
->event
== XFRM_MSG_DELSA
) {
2490 len
+= nla_total_size(headlen
);
2491 headlen
= sizeof(*id
);
2492 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2494 len
+= NLMSG_ALIGN(headlen
);
2496 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2500 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2505 p
= nlmsg_data(nlh
);
2506 if (c
->event
== XFRM_MSG_DELSA
) {
2507 struct nlattr
*attr
;
2509 id
= nlmsg_data(nlh
);
2510 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2511 id
->spi
= x
->id
.spi
;
2512 id
->family
= x
->props
.family
;
2513 id
->proto
= x
->id
.proto
;
2515 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
2522 err
= copy_to_user_state_extra(x
, p
, skb
);
2526 nlmsg_end(skb
, nlh
);
2528 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2535 static int xfrm_send_state_notify(struct xfrm_state
*x
, const struct km_event
*c
)
2539 case XFRM_MSG_EXPIRE
:
2540 return xfrm_exp_state_notify(x
, c
);
2541 case XFRM_MSG_NEWAE
:
2542 return xfrm_aevent_state_notify(x
, c
);
2543 case XFRM_MSG_DELSA
:
2544 case XFRM_MSG_UPDSA
:
2545 case XFRM_MSG_NEWSA
:
2546 return xfrm_notify_sa(x
, c
);
2547 case XFRM_MSG_FLUSHSA
:
2548 return xfrm_notify_sa_flush(c
);
2550 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
2559 static inline size_t xfrm_acquire_msgsize(struct xfrm_state
*x
,
2560 struct xfrm_policy
*xp
)
2562 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
2563 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2564 + nla_total_size(sizeof(struct xfrm_mark
))
2565 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
2566 + userpolicy_type_attrsize();
2569 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2570 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
2573 __u32 seq
= xfrm_get_acqseq();
2574 struct xfrm_user_acquire
*ua
;
2575 struct nlmsghdr
*nlh
;
2578 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2582 ua
= nlmsg_data(nlh
);
2583 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2584 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2585 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2586 copy_to_user_policy(xp
, &ua
->policy
, dir
);
2587 ua
->aalgos
= xt
->aalgos
;
2588 ua
->ealgos
= xt
->ealgos
;
2589 ua
->calgos
= xt
->calgos
;
2590 ua
->seq
= x
->km
.seq
= seq
;
2592 err
= copy_to_user_tmpl(xp
, skb
);
2594 err
= copy_to_user_state_sec_ctx(x
, skb
);
2596 err
= copy_to_user_policy_type(xp
->type
, skb
);
2598 err
= xfrm_mark_put(skb
, &xp
->mark
);
2600 nlmsg_cancel(skb
, nlh
);
2604 return nlmsg_end(skb
, nlh
);
2607 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2608 struct xfrm_policy
*xp
, int dir
)
2610 struct net
*net
= xs_net(x
);
2611 struct sk_buff
*skb
;
2613 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
2617 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
2620 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
2623 /* User gives us xfrm_user_policy_info followed by an array of 0
2624 * or more templates.
2626 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2627 u8
*data
, int len
, int *dir
)
2629 struct net
*net
= sock_net(sk
);
2630 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2631 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2632 struct xfrm_policy
*xp
;
2635 switch (sk
->sk_family
) {
2637 if (opt
!= IP_XFRM_POLICY
) {
2642 #if IS_ENABLED(CONFIG_IPV6)
2644 if (opt
!= IPV6_XFRM_POLICY
) {
2657 if (len
< sizeof(*p
) ||
2658 verify_newpolicy_info(p
))
2661 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2662 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2665 if (p
->dir
> XFRM_POLICY_OUT
)
2668 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
2674 copy_from_user_policy(xp
, p
);
2675 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2676 copy_templates(xp
, ut
, nr
);
2683 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
2685 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
2686 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2687 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
2688 + nla_total_size(sizeof(struct xfrm_mark
))
2689 + userpolicy_type_attrsize();
2692 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2693 int dir
, const struct km_event
*c
)
2695 struct xfrm_user_polexpire
*upe
;
2696 int hard
= c
->data
.hard
;
2697 struct nlmsghdr
*nlh
;
2700 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2704 upe
= nlmsg_data(nlh
);
2705 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2706 err
= copy_to_user_tmpl(xp
, skb
);
2708 err
= copy_to_user_sec_ctx(xp
, skb
);
2710 err
= copy_to_user_policy_type(xp
->type
, skb
);
2712 err
= xfrm_mark_put(skb
, &xp
->mark
);
2714 nlmsg_cancel(skb
, nlh
);
2719 return nlmsg_end(skb
, nlh
);
2722 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2724 struct net
*net
= xp_net(xp
);
2725 struct sk_buff
*skb
;
2727 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
2731 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2734 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2737 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2739 int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2740 struct net
*net
= xp_net(xp
);
2741 struct xfrm_userpolicy_info
*p
;
2742 struct xfrm_userpolicy_id
*id
;
2743 struct nlmsghdr
*nlh
;
2744 struct sk_buff
*skb
;
2747 headlen
= sizeof(*p
);
2748 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2749 len
+= nla_total_size(headlen
);
2750 headlen
= sizeof(*id
);
2752 len
+= userpolicy_type_attrsize();
2753 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2754 len
+= NLMSG_ALIGN(headlen
);
2756 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2760 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2765 p
= nlmsg_data(nlh
);
2766 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2767 struct nlattr
*attr
;
2769 id
= nlmsg_data(nlh
);
2770 memset(id
, 0, sizeof(*id
));
2773 id
->index
= xp
->index
;
2775 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2777 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
2785 copy_to_user_policy(xp
, p
, dir
);
2786 err
= copy_to_user_tmpl(xp
, skb
);
2788 err
= copy_to_user_policy_type(xp
->type
, skb
);
2790 err
= xfrm_mark_put(skb
, &xp
->mark
);
2794 nlmsg_end(skb
, nlh
);
2796 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2803 static int xfrm_notify_policy_flush(const struct km_event
*c
)
2805 struct net
*net
= c
->net
;
2806 struct nlmsghdr
*nlh
;
2807 struct sk_buff
*skb
;
2810 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
2814 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
2818 err
= copy_to_user_policy_type(c
->data
.type
, skb
);
2822 nlmsg_end(skb
, nlh
);
2824 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2831 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
)
2835 case XFRM_MSG_NEWPOLICY
:
2836 case XFRM_MSG_UPDPOLICY
:
2837 case XFRM_MSG_DELPOLICY
:
2838 return xfrm_notify_policy(xp
, dir
, c
);
2839 case XFRM_MSG_FLUSHPOLICY
:
2840 return xfrm_notify_policy_flush(c
);
2841 case XFRM_MSG_POLEXPIRE
:
2842 return xfrm_exp_policy_notify(xp
, dir
, c
);
2844 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
2852 static inline size_t xfrm_report_msgsize(void)
2854 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
2857 static int build_report(struct sk_buff
*skb
, u8 proto
,
2858 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2860 struct xfrm_user_report
*ur
;
2861 struct nlmsghdr
*nlh
;
2863 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
2867 ur
= nlmsg_data(nlh
);
2869 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2872 int err
= nla_put(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2874 nlmsg_cancel(skb
, nlh
);
2878 return nlmsg_end(skb
, nlh
);
2881 static int xfrm_send_report(struct net
*net
, u8 proto
,
2882 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2884 struct sk_buff
*skb
;
2886 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
2890 if (build_report(skb
, proto
, sel
, addr
) < 0)
2893 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2896 static inline size_t xfrm_mapping_msgsize(void)
2898 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
2901 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
2902 xfrm_address_t
*new_saddr
, __be16 new_sport
)
2904 struct xfrm_user_mapping
*um
;
2905 struct nlmsghdr
*nlh
;
2907 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
2911 um
= nlmsg_data(nlh
);
2913 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
2914 um
->id
.spi
= x
->id
.spi
;
2915 um
->id
.family
= x
->props
.family
;
2916 um
->id
.proto
= x
->id
.proto
;
2917 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
2918 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
2919 um
->new_sport
= new_sport
;
2920 um
->old_sport
= x
->encap
->encap_sport
;
2921 um
->reqid
= x
->props
.reqid
;
2923 return nlmsg_end(skb
, nlh
);
2926 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
2929 struct net
*net
= xs_net(x
);
2930 struct sk_buff
*skb
;
2932 if (x
->id
.proto
!= IPPROTO_ESP
)
2938 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
2942 if (build_mapping(skb
, x
, ipaddr
, sport
) < 0)
2945 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MAPPING
, GFP_ATOMIC
);
2948 static struct xfrm_mgr netlink_mgr
= {
2950 .notify
= xfrm_send_state_notify
,
2951 .acquire
= xfrm_send_acquire
,
2952 .compile_policy
= xfrm_compile_policy
,
2953 .notify_policy
= xfrm_send_policy_notify
,
2954 .report
= xfrm_send_report
,
2955 .migrate
= xfrm_send_migrate
,
2956 .new_mapping
= xfrm_send_mapping
,
2959 static int __net_init
xfrm_user_net_init(struct net
*net
)
2962 struct netlink_kernel_cfg cfg
= {
2963 .groups
= XFRMNLGRP_MAX
,
2964 .input
= xfrm_netlink_rcv
,
2967 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, THIS_MODULE
, &cfg
);
2970 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
2971 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
2975 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
2978 list_for_each_entry(net
, net_exit_list
, exit_list
)
2979 RCU_INIT_POINTER(net
->xfrm
.nlsk
, NULL
);
2981 list_for_each_entry(net
, net_exit_list
, exit_list
)
2982 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
2985 static struct pernet_operations xfrm_user_net_ops
= {
2986 .init
= xfrm_user_net_init
,
2987 .exit_batch
= xfrm_user_net_exit
,
2990 static int __init
xfrm_user_init(void)
2994 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
2996 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
2999 rv
= xfrm_register_km(&netlink_mgr
);
3001 unregister_pernet_subsys(&xfrm_user_net_ops
);
3005 static void __exit
xfrm_user_exit(void)
3007 xfrm_unregister_km(&netlink_mgr
);
3008 unregister_pernet_subsys(&xfrm_user_net_ops
);
3011 module_init(xfrm_user_init
);
3012 module_exit(xfrm_user_exit
);
3013 MODULE_LICENSE("GPL");
3014 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);