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>
29 #include <asm/uaccess.h>
30 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31 #include <linux/in6.h>
34 static inline int aead_len(struct xfrm_algo_aead
*alg
)
36 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
39 static int verify_one_alg(struct nlattr
**attrs
, enum xfrm_attr_type_t type
)
41 struct nlattr
*rt
= attrs
[type
];
42 struct xfrm_algo
*algp
;
48 if (nla_len(rt
) < xfrm_alg_len(algp
))
61 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
65 static int verify_auth_trunc(struct nlattr
**attrs
)
67 struct nlattr
*rt
= attrs
[XFRMA_ALG_AUTH_TRUNC
];
68 struct xfrm_algo_auth
*algp
;
74 if (nla_len(rt
) < xfrm_alg_auth_len(algp
))
77 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
81 static int verify_aead(struct nlattr
**attrs
)
83 struct nlattr
*rt
= attrs
[XFRMA_ALG_AEAD
];
84 struct xfrm_algo_aead
*algp
;
90 if (nla_len(rt
) < aead_len(algp
))
93 algp
->alg_name
[CRYPTO_MAX_ALG_NAME
- 1] = '\0';
97 static void verify_one_addr(struct nlattr
**attrs
, enum xfrm_attr_type_t type
,
98 xfrm_address_t
**addrp
)
100 struct nlattr
*rt
= attrs
[type
];
103 *addrp
= nla_data(rt
);
106 static inline int verify_sec_ctx_len(struct nlattr
**attrs
)
108 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
109 struct xfrm_user_sec_ctx
*uctx
;
115 if (uctx
->len
!= (sizeof(struct xfrm_user_sec_ctx
) + uctx
->ctx_len
))
122 static int verify_newsa_info(struct xfrm_usersa_info
*p
,
123 struct nlattr
**attrs
)
133 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
145 switch (p
->id
.proto
) {
147 if ((!attrs
[XFRMA_ALG_AUTH
] &&
148 !attrs
[XFRMA_ALG_AUTH_TRUNC
]) ||
149 attrs
[XFRMA_ALG_AEAD
] ||
150 attrs
[XFRMA_ALG_CRYPT
] ||
151 attrs
[XFRMA_ALG_COMP
] ||
157 if (attrs
[XFRMA_ALG_COMP
])
159 if (!attrs
[XFRMA_ALG_AUTH
] &&
160 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
161 !attrs
[XFRMA_ALG_CRYPT
] &&
162 !attrs
[XFRMA_ALG_AEAD
])
164 if ((attrs
[XFRMA_ALG_AUTH
] ||
165 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
166 attrs
[XFRMA_ALG_CRYPT
]) &&
167 attrs
[XFRMA_ALG_AEAD
])
169 if (attrs
[XFRMA_TFCPAD
] &&
170 p
->mode
!= XFRM_MODE_TUNNEL
)
175 if (!attrs
[XFRMA_ALG_COMP
] ||
176 attrs
[XFRMA_ALG_AEAD
] ||
177 attrs
[XFRMA_ALG_AUTH
] ||
178 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
179 attrs
[XFRMA_ALG_CRYPT
] ||
184 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
185 case IPPROTO_DSTOPTS
:
186 case IPPROTO_ROUTING
:
187 if (attrs
[XFRMA_ALG_COMP
] ||
188 attrs
[XFRMA_ALG_AUTH
] ||
189 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
190 attrs
[XFRMA_ALG_AEAD
] ||
191 attrs
[XFRMA_ALG_CRYPT
] ||
192 attrs
[XFRMA_ENCAP
] ||
193 attrs
[XFRMA_SEC_CTX
] ||
194 attrs
[XFRMA_TFCPAD
] ||
195 !attrs
[XFRMA_COADDR
])
204 if ((err
= verify_aead(attrs
)))
206 if ((err
= verify_auth_trunc(attrs
)))
208 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_AUTH
)))
210 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_CRYPT
)))
212 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_COMP
)))
214 if ((err
= verify_sec_ctx_len(attrs
)))
219 case XFRM_MODE_TRANSPORT
:
220 case XFRM_MODE_TUNNEL
:
221 case XFRM_MODE_ROUTEOPTIMIZATION
:
235 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
236 struct xfrm_algo_desc
*(*get_byname
)(char *, int),
239 struct xfrm_algo
*p
, *ualg
;
240 struct xfrm_algo_desc
*algo
;
245 ualg
= nla_data(rta
);
247 algo
= get_byname(ualg
->alg_name
, 1);
250 *props
= algo
->desc
.sadb_alg_id
;
252 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
256 strcpy(p
->alg_name
, algo
->name
);
261 static int attach_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
264 struct xfrm_algo
*ualg
;
265 struct xfrm_algo_auth
*p
;
266 struct xfrm_algo_desc
*algo
;
271 ualg
= nla_data(rta
);
273 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
276 *props
= algo
->desc
.sadb_alg_id
;
278 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
282 strcpy(p
->alg_name
, algo
->name
);
283 p
->alg_key_len
= ualg
->alg_key_len
;
284 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
285 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
291 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
294 struct xfrm_algo_auth
*p
, *ualg
;
295 struct xfrm_algo_desc
*algo
;
300 ualg
= nla_data(rta
);
302 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
305 if (ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
307 *props
= algo
->desc
.sadb_alg_id
;
309 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
313 strcpy(p
->alg_name
, algo
->name
);
314 if (!p
->alg_trunc_len
)
315 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
321 static int attach_aead(struct xfrm_algo_aead
**algpp
, u8
*props
,
324 struct xfrm_algo_aead
*p
, *ualg
;
325 struct xfrm_algo_desc
*algo
;
330 ualg
= nla_data(rta
);
332 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
335 *props
= algo
->desc
.sadb_alg_id
;
337 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
341 strcpy(p
->alg_name
, algo
->name
);
346 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
351 len
+= sizeof(struct xfrm_user_sec_ctx
);
352 len
+= xfrm_ctx
->ctx_len
;
357 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
359 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
360 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
361 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
362 x
->props
.mode
= p
->mode
;
363 x
->props
.replay_window
= p
->replay_window
;
364 x
->props
.reqid
= p
->reqid
;
365 x
->props
.family
= p
->family
;
366 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
367 x
->props
.flags
= p
->flags
;
369 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
370 x
->sel
.family
= p
->family
;
374 * someday when pfkey also has support, we could have the code
375 * somehow made shareable and move it to xfrm_state.c - JHS
378 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
)
380 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
381 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
382 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
383 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
386 struct xfrm_replay_state
*replay
;
387 replay
= nla_data(rp
);
388 memcpy(&x
->replay
, replay
, sizeof(*replay
));
389 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
393 struct xfrm_lifetime_cur
*ltime
;
394 ltime
= nla_data(lt
);
395 x
->curlft
.bytes
= ltime
->bytes
;
396 x
->curlft
.packets
= ltime
->packets
;
397 x
->curlft
.add_time
= ltime
->add_time
;
398 x
->curlft
.use_time
= ltime
->use_time
;
402 x
->replay_maxage
= nla_get_u32(et
);
405 x
->replay_maxdiff
= nla_get_u32(rt
);
408 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
409 struct xfrm_usersa_info
*p
,
410 struct nlattr
**attrs
,
413 struct xfrm_state
*x
= xfrm_state_alloc(net
);
419 copy_from_user_state(x
, p
);
421 if ((err
= attach_aead(&x
->aead
, &x
->props
.ealgo
,
422 attrs
[XFRMA_ALG_AEAD
])))
424 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
425 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
427 if (!x
->props
.aalgo
) {
428 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
429 attrs
[XFRMA_ALG_AUTH
])))
432 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
433 xfrm_ealg_get_byname
,
434 attrs
[XFRMA_ALG_CRYPT
])))
436 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
437 xfrm_calg_get_byname
,
438 attrs
[XFRMA_ALG_COMP
])))
441 if (attrs
[XFRMA_ENCAP
]) {
442 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
443 sizeof(*x
->encap
), GFP_KERNEL
);
444 if (x
->encap
== NULL
)
448 if (attrs
[XFRMA_TFCPAD
])
449 x
->tfcpad
= nla_get_u32(attrs
[XFRMA_TFCPAD
]);
451 if (attrs
[XFRMA_COADDR
]) {
452 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
453 sizeof(*x
->coaddr
), GFP_KERNEL
);
454 if (x
->coaddr
== NULL
)
458 xfrm_mark_get(attrs
, &x
->mark
);
460 err
= xfrm_init_state(x
);
464 if (attrs
[XFRMA_SEC_CTX
] &&
465 security_xfrm_state_alloc(x
, nla_data(attrs
[XFRMA_SEC_CTX
])))
469 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
470 /* sysctl_xfrm_aevent_etime is in 100ms units */
471 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
472 x
->preplay
.bitmap
= 0;
473 x
->preplay
.seq
= x
->replay
.seq
+x
->replay_maxdiff
;
474 x
->preplay
.oseq
= x
->replay
.oseq
+x
->replay_maxdiff
;
476 /* override default values from above */
478 xfrm_update_ae_params(x
, attrs
);
483 x
->km
.state
= XFRM_STATE_DEAD
;
490 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
491 struct nlattr
**attrs
)
493 struct net
*net
= sock_net(skb
->sk
);
494 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
495 struct xfrm_state
*x
;
498 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
499 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
500 u32 sid
= NETLINK_CB(skb
).sid
;
502 err
= verify_newsa_info(p
, attrs
);
506 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
511 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
512 err
= xfrm_state_add(x
);
514 err
= xfrm_state_update(x
);
516 xfrm_audit_state_add(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
519 x
->km
.state
= XFRM_STATE_DEAD
;
524 c
.seq
= nlh
->nlmsg_seq
;
525 c
.pid
= nlh
->nlmsg_pid
;
526 c
.event
= nlh
->nlmsg_type
;
528 km_state_notify(x
, &c
);
534 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
535 struct xfrm_usersa_id
*p
,
536 struct nlattr
**attrs
,
539 struct xfrm_state
*x
= NULL
;
542 u32 mark
= xfrm_mark_get(attrs
, &m
);
544 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
546 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
548 xfrm_address_t
*saddr
= NULL
;
550 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
557 x
= xfrm_state_lookup_byaddr(net
, mark
,
559 p
->proto
, p
->family
);
568 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
569 struct nlattr
**attrs
)
571 struct net
*net
= sock_net(skb
->sk
);
572 struct xfrm_state
*x
;
575 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
576 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
577 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
578 u32 sid
= NETLINK_CB(skb
).sid
;
580 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
584 if ((err
= security_xfrm_state_delete(x
)) != 0)
587 if (xfrm_state_kern(x
)) {
592 err
= xfrm_state_delete(x
);
597 c
.seq
= nlh
->nlmsg_seq
;
598 c
.pid
= nlh
->nlmsg_pid
;
599 c
.event
= nlh
->nlmsg_type
;
600 km_state_notify(x
, &c
);
603 xfrm_audit_state_delete(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
608 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
610 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
611 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
612 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
613 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
614 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
615 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
616 p
->mode
= x
->props
.mode
;
617 p
->replay_window
= x
->props
.replay_window
;
618 p
->reqid
= x
->props
.reqid
;
619 p
->family
= x
->props
.family
;
620 p
->flags
= x
->props
.flags
;
624 struct xfrm_dump_info
{
625 struct sk_buff
*in_skb
;
626 struct sk_buff
*out_skb
;
631 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
633 struct xfrm_user_sec_ctx
*uctx
;
635 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
637 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
641 uctx
= nla_data(attr
);
642 uctx
->exttype
= XFRMA_SEC_CTX
;
643 uctx
->len
= ctx_size
;
644 uctx
->ctx_doi
= s
->ctx_doi
;
645 uctx
->ctx_alg
= s
->ctx_alg
;
646 uctx
->ctx_len
= s
->ctx_len
;
647 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
652 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
654 struct xfrm_algo
*algo
;
657 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
658 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
662 algo
= nla_data(nla
);
663 strcpy(algo
->alg_name
, auth
->alg_name
);
664 memcpy(algo
->alg_key
, auth
->alg_key
, (auth
->alg_key_len
+ 7) / 8);
665 algo
->alg_key_len
= auth
->alg_key_len
;
670 /* Don't change this without updating xfrm_sa_len! */
671 static int copy_to_user_state_extra(struct xfrm_state
*x
,
672 struct xfrm_usersa_info
*p
,
675 copy_to_user_state(x
, p
);
678 NLA_PUT(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
681 NLA_PUT_U64(skb
, XFRMA_LASTUSED
, x
->lastused
);
684 NLA_PUT(skb
, XFRMA_ALG_AEAD
, aead_len(x
->aead
), x
->aead
);
686 if (copy_to_user_auth(x
->aalg
, skb
))
687 goto nla_put_failure
;
689 NLA_PUT(skb
, XFRMA_ALG_AUTH_TRUNC
,
690 xfrm_alg_auth_len(x
->aalg
), x
->aalg
);
693 NLA_PUT(skb
, XFRMA_ALG_CRYPT
, xfrm_alg_len(x
->ealg
), x
->ealg
);
695 NLA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
698 NLA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
701 NLA_PUT_U32(skb
, XFRMA_TFCPAD
, x
->tfcpad
);
703 if (xfrm_mark_put(skb
, &x
->mark
))
704 goto nla_put_failure
;
706 if (x
->security
&& copy_sec_ctx(x
->security
, skb
) < 0)
707 goto nla_put_failure
;
715 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
717 struct xfrm_dump_info
*sp
= ptr
;
718 struct sk_buff
*in_skb
= sp
->in_skb
;
719 struct sk_buff
*skb
= sp
->out_skb
;
720 struct xfrm_usersa_info
*p
;
721 struct nlmsghdr
*nlh
;
724 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
725 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
731 err
= copy_to_user_state_extra(x
, p
, skb
);
733 goto nla_put_failure
;
739 nlmsg_cancel(skb
, nlh
);
743 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
745 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
746 xfrm_state_walk_done(walk
);
750 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
752 struct net
*net
= sock_net(skb
->sk
);
753 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
754 struct xfrm_dump_info info
;
756 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
757 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
759 info
.in_skb
= cb
->skb
;
761 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
762 info
.nlmsg_flags
= NLM_F_MULTI
;
766 xfrm_state_walk_init(walk
, 0);
769 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
774 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
775 struct xfrm_state
*x
, u32 seq
)
777 struct xfrm_dump_info info
;
780 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
782 return ERR_PTR(-ENOMEM
);
784 info
.in_skb
= in_skb
;
786 info
.nlmsg_seq
= seq
;
787 info
.nlmsg_flags
= 0;
789 if (dump_one_state(x
, 0, &info
)) {
797 static inline size_t xfrm_spdinfo_msgsize(void)
799 return NLMSG_ALIGN(4)
800 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
801 + nla_total_size(sizeof(struct xfrmu_spdhinfo
));
804 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
805 u32 pid
, u32 seq
, u32 flags
)
807 struct xfrmk_spdinfo si
;
808 struct xfrmu_spdinfo spc
;
809 struct xfrmu_spdhinfo sph
;
810 struct nlmsghdr
*nlh
;
813 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
814 if (nlh
== NULL
) /* shouldnt really happen ... */
819 xfrm_spd_getinfo(net
, &si
);
820 spc
.incnt
= si
.incnt
;
821 spc
.outcnt
= si
.outcnt
;
822 spc
.fwdcnt
= si
.fwdcnt
;
823 spc
.inscnt
= si
.inscnt
;
824 spc
.outscnt
= si
.outscnt
;
825 spc
.fwdscnt
= si
.fwdscnt
;
826 sph
.spdhcnt
= si
.spdhcnt
;
827 sph
.spdhmcnt
= si
.spdhmcnt
;
829 NLA_PUT(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
830 NLA_PUT(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
832 return nlmsg_end(skb
, nlh
);
835 nlmsg_cancel(skb
, nlh
);
839 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
840 struct nlattr
**attrs
)
842 struct net
*net
= sock_net(skb
->sk
);
843 struct sk_buff
*r_skb
;
844 u32
*flags
= nlmsg_data(nlh
);
845 u32 spid
= NETLINK_CB(skb
).pid
;
846 u32 seq
= nlh
->nlmsg_seq
;
848 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
852 if (build_spdinfo(r_skb
, net
, spid
, seq
, *flags
) < 0)
855 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, spid
);
858 static inline size_t xfrm_sadinfo_msgsize(void)
860 return NLMSG_ALIGN(4)
861 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
862 + nla_total_size(4); /* XFRMA_SAD_CNT */
865 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
866 u32 pid
, u32 seq
, u32 flags
)
868 struct xfrmk_sadinfo si
;
869 struct xfrmu_sadhinfo sh
;
870 struct nlmsghdr
*nlh
;
873 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
874 if (nlh
== NULL
) /* shouldnt really happen ... */
879 xfrm_sad_getinfo(net
, &si
);
881 sh
.sadhmcnt
= si
.sadhmcnt
;
882 sh
.sadhcnt
= si
.sadhcnt
;
884 NLA_PUT_U32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
885 NLA_PUT(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
887 return nlmsg_end(skb
, nlh
);
890 nlmsg_cancel(skb
, nlh
);
894 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
895 struct nlattr
**attrs
)
897 struct net
*net
= sock_net(skb
->sk
);
898 struct sk_buff
*r_skb
;
899 u32
*flags
= nlmsg_data(nlh
);
900 u32 spid
= NETLINK_CB(skb
).pid
;
901 u32 seq
= nlh
->nlmsg_seq
;
903 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
907 if (build_sadinfo(r_skb
, net
, spid
, seq
, *flags
) < 0)
910 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, spid
);
913 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
914 struct nlattr
**attrs
)
916 struct net
*net
= sock_net(skb
->sk
);
917 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
918 struct xfrm_state
*x
;
919 struct sk_buff
*resp_skb
;
922 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
926 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
927 if (IS_ERR(resp_skb
)) {
928 err
= PTR_ERR(resp_skb
);
930 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).pid
);
937 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
939 switch (p
->info
.id
.proto
) {
945 /* IPCOMP spi is 16-bits. */
946 if (p
->max
>= 0x10000)
960 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
961 struct nlattr
**attrs
)
963 struct net
*net
= sock_net(skb
->sk
);
964 struct xfrm_state
*x
;
965 struct xfrm_userspi_info
*p
;
966 struct sk_buff
*resp_skb
;
967 xfrm_address_t
*daddr
;
974 err
= verify_userspi_info(p
);
978 family
= p
->info
.family
;
979 daddr
= &p
->info
.id
.daddr
;
983 mark
= xfrm_mark_get(attrs
, &m
);
985 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
986 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
993 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
994 p
->info
.id
.proto
, daddr
,
1001 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
1005 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
1006 if (IS_ERR(resp_skb
)) {
1007 err
= PTR_ERR(resp_skb
);
1011 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).pid
);
1019 static int verify_policy_dir(u8 dir
)
1022 case XFRM_POLICY_IN
:
1023 case XFRM_POLICY_OUT
:
1024 case XFRM_POLICY_FWD
:
1034 static int verify_policy_type(u8 type
)
1037 case XFRM_POLICY_TYPE_MAIN
:
1038 #ifdef CONFIG_XFRM_SUB_POLICY
1039 case XFRM_POLICY_TYPE_SUB
:
1050 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1053 case XFRM_SHARE_ANY
:
1054 case XFRM_SHARE_SESSION
:
1055 case XFRM_SHARE_USER
:
1056 case XFRM_SHARE_UNIQUE
:
1063 switch (p
->action
) {
1064 case XFRM_POLICY_ALLOW
:
1065 case XFRM_POLICY_BLOCK
:
1072 switch (p
->sel
.family
) {
1077 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1080 return -EAFNOSUPPORT
;
1087 return verify_policy_dir(p
->dir
);
1090 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1092 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1093 struct xfrm_user_sec_ctx
*uctx
;
1098 uctx
= nla_data(rt
);
1099 return security_xfrm_policy_alloc(&pol
->security
, uctx
);
1102 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1108 for (i
= 0; i
< nr
; i
++, ut
++) {
1109 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1111 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1112 memcpy(&t
->saddr
, &ut
->saddr
,
1113 sizeof(xfrm_address_t
));
1114 t
->reqid
= ut
->reqid
;
1116 t
->share
= ut
->share
;
1117 t
->optional
= ut
->optional
;
1118 t
->aalgos
= ut
->aalgos
;
1119 t
->ealgos
= ut
->ealgos
;
1120 t
->calgos
= ut
->calgos
;
1121 /* If all masks are ~0, then we allow all algorithms. */
1122 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1123 t
->encap_family
= ut
->family
;
1127 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1131 if (nr
> XFRM_MAX_DEPTH
)
1134 for (i
= 0; i
< nr
; i
++) {
1135 /* We never validated the ut->family value, so many
1136 * applications simply leave it at zero. The check was
1137 * never made and ut->family was ignored because all
1138 * templates could be assumed to have the same family as
1139 * the policy itself. Now that we will have ipv4-in-ipv6
1140 * and ipv6-in-ipv4 tunnels, this is no longer true.
1143 ut
[i
].family
= family
;
1145 switch (ut
[i
].family
) {
1148 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1160 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1162 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1167 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1168 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1171 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1175 copy_templates(pol
, utmpl
, nr
);
1180 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1182 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1183 struct xfrm_userpolicy_type
*upt
;
1184 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1192 err
= verify_policy_type(type
);
1200 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1202 xp
->priority
= p
->priority
;
1203 xp
->index
= p
->index
;
1204 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1205 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1206 xp
->action
= p
->action
;
1207 xp
->flags
= p
->flags
;
1208 xp
->family
= p
->sel
.family
;
1209 /* XXX xp->share = p->share; */
1212 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1214 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1215 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1216 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1217 p
->priority
= xp
->priority
;
1218 p
->index
= xp
->index
;
1219 p
->sel
.family
= xp
->family
;
1221 p
->action
= xp
->action
;
1222 p
->flags
= xp
->flags
;
1223 p
->share
= XFRM_SHARE_ANY
; /* XXX xp->share */
1226 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1228 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1236 copy_from_user_policy(xp
, p
);
1238 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1242 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1243 err
= copy_from_user_sec_ctx(xp
, attrs
);
1247 xfrm_mark_get(attrs
, &xp
->mark
);
1253 xfrm_policy_destroy(xp
);
1257 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1258 struct nlattr
**attrs
)
1260 struct net
*net
= sock_net(skb
->sk
);
1261 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1262 struct xfrm_policy
*xp
;
1266 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1267 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
1268 u32 sid
= NETLINK_CB(skb
).sid
;
1270 err
= verify_newpolicy_info(p
);
1273 err
= verify_sec_ctx_len(attrs
);
1277 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1281 /* shouldnt excl be based on nlh flags??
1282 * Aha! this is anti-netlink really i.e more pfkey derived
1283 * in netlink excl is a flag and you wouldnt need
1284 * a type XFRM_MSG_UPDPOLICY - JHS */
1285 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1286 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1287 xfrm_audit_policy_add(xp
, err
? 0 : 1, loginuid
, sessionid
, sid
);
1290 security_xfrm_policy_free(xp
->security
);
1295 c
.event
= nlh
->nlmsg_type
;
1296 c
.seq
= nlh
->nlmsg_seq
;
1297 c
.pid
= nlh
->nlmsg_pid
;
1298 km_policy_notify(xp
, p
->dir
, &c
);
1305 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1307 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1310 if (xp
->xfrm_nr
== 0)
1313 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1314 struct xfrm_user_tmpl
*up
= &vec
[i
];
1315 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1317 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1318 up
->family
= kp
->encap_family
;
1319 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1320 up
->reqid
= kp
->reqid
;
1321 up
->mode
= kp
->mode
;
1322 up
->share
= kp
->share
;
1323 up
->optional
= kp
->optional
;
1324 up
->aalgos
= kp
->aalgos
;
1325 up
->ealgos
= kp
->ealgos
;
1326 up
->calgos
= kp
->calgos
;
1329 return nla_put(skb
, XFRMA_TMPL
,
1330 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1333 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1336 return copy_sec_ctx(x
->security
, skb
);
1341 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1344 return copy_sec_ctx(xp
->security
, skb
);
1348 static inline size_t userpolicy_type_attrsize(void)
1350 #ifdef CONFIG_XFRM_SUB_POLICY
1351 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1357 #ifdef CONFIG_XFRM_SUB_POLICY
1358 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1360 struct xfrm_userpolicy_type upt
= {
1364 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1368 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1374 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1376 struct xfrm_dump_info
*sp
= ptr
;
1377 struct xfrm_userpolicy_info
*p
;
1378 struct sk_buff
*in_skb
= sp
->in_skb
;
1379 struct sk_buff
*skb
= sp
->out_skb
;
1380 struct nlmsghdr
*nlh
;
1382 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
1383 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1387 p
= nlmsg_data(nlh
);
1388 copy_to_user_policy(xp
, p
, dir
);
1389 if (copy_to_user_tmpl(xp
, skb
) < 0)
1391 if (copy_to_user_sec_ctx(xp
, skb
))
1393 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1395 if (xfrm_mark_put(skb
, &xp
->mark
))
1396 goto nla_put_failure
;
1398 nlmsg_end(skb
, nlh
);
1403 nlmsg_cancel(skb
, nlh
);
1407 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1409 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1411 xfrm_policy_walk_done(walk
);
1415 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1417 struct net
*net
= sock_net(skb
->sk
);
1418 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1419 struct xfrm_dump_info info
;
1421 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk
) >
1422 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1424 info
.in_skb
= cb
->skb
;
1426 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1427 info
.nlmsg_flags
= NLM_F_MULTI
;
1431 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1434 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1439 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1440 struct xfrm_policy
*xp
,
1443 struct xfrm_dump_info info
;
1444 struct sk_buff
*skb
;
1446 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1448 return ERR_PTR(-ENOMEM
);
1450 info
.in_skb
= in_skb
;
1452 info
.nlmsg_seq
= seq
;
1453 info
.nlmsg_flags
= 0;
1455 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
1463 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1464 struct nlattr
**attrs
)
1466 struct net
*net
= sock_net(skb
->sk
);
1467 struct xfrm_policy
*xp
;
1468 struct xfrm_userpolicy_id
*p
;
1469 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1474 u32 mark
= xfrm_mark_get(attrs
, &m
);
1476 p
= nlmsg_data(nlh
);
1477 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1479 err
= copy_from_user_policy_type(&type
, attrs
);
1483 err
= verify_policy_dir(p
->dir
);
1488 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, delete, &err
);
1490 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1491 struct xfrm_sec_ctx
*ctx
;
1493 err
= verify_sec_ctx_len(attrs
);
1499 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1501 err
= security_xfrm_policy_alloc(&ctx
, uctx
);
1505 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
, &p
->sel
,
1507 security_xfrm_policy_free(ctx
);
1513 struct sk_buff
*resp_skb
;
1515 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1516 if (IS_ERR(resp_skb
)) {
1517 err
= PTR_ERR(resp_skb
);
1519 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
1520 NETLINK_CB(skb
).pid
);
1523 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1524 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
1525 u32 sid
= NETLINK_CB(skb
).sid
;
1527 xfrm_audit_policy_delete(xp
, err
? 0 : 1, loginuid
, sessionid
,
1533 c
.data
.byid
= p
->index
;
1534 c
.event
= nlh
->nlmsg_type
;
1535 c
.seq
= nlh
->nlmsg_seq
;
1536 c
.pid
= nlh
->nlmsg_pid
;
1537 km_policy_notify(xp
, p
->dir
, &c
);
1545 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1546 struct nlattr
**attrs
)
1548 struct net
*net
= sock_net(skb
->sk
);
1550 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1551 struct xfrm_audit audit_info
;
1554 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1555 audit_info
.sessionid
= NETLINK_CB(skb
).sessionid
;
1556 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1557 err
= xfrm_state_flush(net
, p
->proto
, &audit_info
);
1559 if (err
== -ESRCH
) /* empty table */
1563 c
.data
.proto
= p
->proto
;
1564 c
.event
= nlh
->nlmsg_type
;
1565 c
.seq
= nlh
->nlmsg_seq
;
1566 c
.pid
= nlh
->nlmsg_pid
;
1568 km_state_notify(NULL
, &c
);
1573 static inline size_t xfrm_aevent_msgsize(void)
1575 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
1576 + nla_total_size(sizeof(struct xfrm_replay_state
))
1577 + nla_total_size(sizeof(struct xfrm_lifetime_cur
))
1578 + nla_total_size(sizeof(struct xfrm_mark
))
1579 + nla_total_size(4) /* XFRM_AE_RTHR */
1580 + nla_total_size(4); /* XFRM_AE_ETHR */
1583 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1585 struct xfrm_aevent_id
*id
;
1586 struct nlmsghdr
*nlh
;
1588 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1592 id
= nlmsg_data(nlh
);
1593 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
,sizeof(x
->id
.daddr
));
1594 id
->sa_id
.spi
= x
->id
.spi
;
1595 id
->sa_id
.family
= x
->props
.family
;
1596 id
->sa_id
.proto
= x
->id
.proto
;
1597 memcpy(&id
->saddr
, &x
->props
.saddr
,sizeof(x
->props
.saddr
));
1598 id
->reqid
= x
->props
.reqid
;
1599 id
->flags
= c
->data
.aevent
;
1601 NLA_PUT(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
), &x
->replay
);
1602 NLA_PUT(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
);
1604 if (id
->flags
& XFRM_AE_RTHR
)
1605 NLA_PUT_U32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
1607 if (id
->flags
& XFRM_AE_ETHR
)
1608 NLA_PUT_U32(skb
, XFRMA_ETIMER_THRESH
,
1609 x
->replay_maxage
* 10 / HZ
);
1611 if (xfrm_mark_put(skb
, &x
->mark
))
1612 goto nla_put_failure
;
1614 return nlmsg_end(skb
, nlh
);
1617 nlmsg_cancel(skb
, nlh
);
1621 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1622 struct nlattr
**attrs
)
1624 struct net
*net
= sock_net(skb
->sk
);
1625 struct xfrm_state
*x
;
1626 struct sk_buff
*r_skb
;
1631 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1632 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1634 r_skb
= nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC
);
1638 mark
= xfrm_mark_get(attrs
, &m
);
1640 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1647 * XXX: is this lock really needed - none of the other
1648 * gets lock (the concern is things getting updated
1649 * while we are still reading) - jhs
1651 spin_lock_bh(&x
->lock
);
1652 c
.data
.aevent
= p
->flags
;
1653 c
.seq
= nlh
->nlmsg_seq
;
1654 c
.pid
= nlh
->nlmsg_pid
;
1656 if (build_aevent(r_skb
, x
, &c
) < 0)
1658 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).pid
);
1659 spin_unlock_bh(&x
->lock
);
1664 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1665 struct nlattr
**attrs
)
1667 struct net
*net
= sock_net(skb
->sk
);
1668 struct xfrm_state
*x
;
1673 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1674 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
1675 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
1680 /* pedantic mode - thou shalt sayeth replaceth */
1681 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1684 mark
= xfrm_mark_get(attrs
, &m
);
1686 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1690 if (x
->km
.state
!= XFRM_STATE_VALID
)
1693 spin_lock_bh(&x
->lock
);
1694 xfrm_update_ae_params(x
, attrs
);
1695 spin_unlock_bh(&x
->lock
);
1697 c
.event
= nlh
->nlmsg_type
;
1698 c
.seq
= nlh
->nlmsg_seq
;
1699 c
.pid
= nlh
->nlmsg_pid
;
1700 c
.data
.aevent
= XFRM_AE_CU
;
1701 km_state_notify(x
, &c
);
1708 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1709 struct nlattr
**attrs
)
1711 struct net
*net
= sock_net(skb
->sk
);
1713 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1715 struct xfrm_audit audit_info
;
1717 err
= copy_from_user_policy_type(&type
, attrs
);
1721 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1722 audit_info
.sessionid
= NETLINK_CB(skb
).sessionid
;
1723 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1724 err
= xfrm_policy_flush(net
, type
, &audit_info
);
1726 if (err
== -ESRCH
) /* empty table */
1732 c
.event
= nlh
->nlmsg_type
;
1733 c
.seq
= nlh
->nlmsg_seq
;
1734 c
.pid
= nlh
->nlmsg_pid
;
1736 km_policy_notify(NULL
, 0, &c
);
1740 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1741 struct nlattr
**attrs
)
1743 struct net
*net
= sock_net(skb
->sk
);
1744 struct xfrm_policy
*xp
;
1745 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
1746 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1747 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1750 u32 mark
= xfrm_mark_get(attrs
, &m
);
1752 err
= copy_from_user_policy_type(&type
, attrs
);
1756 err
= verify_policy_dir(p
->dir
);
1761 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, 0, &err
);
1763 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1764 struct xfrm_sec_ctx
*ctx
;
1766 err
= verify_sec_ctx_len(attrs
);
1772 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1774 err
= security_xfrm_policy_alloc(&ctx
, uctx
);
1778 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
,
1779 &p
->sel
, ctx
, 0, &err
);
1780 security_xfrm_policy_free(ctx
);
1785 if (unlikely(xp
->walk
.dead
))
1790 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1791 uid_t sessionid
= NETLINK_CB(skb
).sessionid
;
1792 u32 sid
= NETLINK_CB(skb
).sid
;
1793 xfrm_policy_delete(xp
, p
->dir
);
1794 xfrm_audit_policy_delete(xp
, 1, loginuid
, sessionid
, sid
);
1797 // reset the timers here?
1798 WARN(1, "Dont know what to do with soft policy expire\n");
1800 km_policy_expired(xp
, p
->dir
, up
->hard
, current
->pid
);
1807 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1808 struct nlattr
**attrs
)
1810 struct net
*net
= sock_net(skb
->sk
);
1811 struct xfrm_state
*x
;
1813 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
1814 struct xfrm_usersa_info
*p
= &ue
->state
;
1816 u32 mark
= xfrm_mark_get(attrs
, &m
);
1818 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
1824 spin_lock_bh(&x
->lock
);
1826 if (x
->km
.state
!= XFRM_STATE_VALID
)
1828 km_state_expired(x
, ue
->hard
, current
->pid
);
1831 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1832 uid_t sessionid
= NETLINK_CB(skb
).sessionid
;
1833 u32 sid
= NETLINK_CB(skb
).sid
;
1834 __xfrm_state_delete(x
);
1835 xfrm_audit_state_delete(x
, 1, loginuid
, sessionid
, sid
);
1839 spin_unlock_bh(&x
->lock
);
1844 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1845 struct nlattr
**attrs
)
1847 struct net
*net
= sock_net(skb
->sk
);
1848 struct xfrm_policy
*xp
;
1849 struct xfrm_user_tmpl
*ut
;
1851 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1852 struct xfrm_mark mark
;
1854 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
1855 struct xfrm_state
*x
= xfrm_state_alloc(net
);
1861 xfrm_mark_get(attrs
, &mark
);
1863 err
= verify_newpolicy_info(&ua
->policy
);
1868 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
1872 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
1873 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
1874 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
1875 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
1876 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
1878 /* extract the templates and for each call km_key */
1879 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
1880 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1881 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
1882 x
->props
.mode
= t
->mode
;
1883 x
->props
.reqid
= t
->reqid
;
1884 x
->props
.family
= ut
->family
;
1885 t
->aalgos
= ua
->aalgos
;
1886 t
->ealgos
= ua
->ealgos
;
1887 t
->calgos
= ua
->calgos
;
1888 err
= km_query(x
, t
, xp
);
1898 WARN(1, "BAD policy passed\n");
1905 #ifdef CONFIG_XFRM_MIGRATE
1906 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
1907 struct xfrm_kmaddress
*k
,
1908 struct nlattr
**attrs
, int *num
)
1910 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
1911 struct xfrm_user_migrate
*um
;
1915 struct xfrm_user_kmaddress
*uk
;
1917 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
1918 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
1919 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
1920 k
->family
= uk
->family
;
1921 k
->reserved
= uk
->reserved
;
1925 num_migrate
= nla_len(rt
) / sizeof(*um
);
1927 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
1930 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
1931 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
1932 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
1933 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
1934 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
1936 ma
->proto
= um
->proto
;
1937 ma
->mode
= um
->mode
;
1938 ma
->reqid
= um
->reqid
;
1940 ma
->old_family
= um
->old_family
;
1941 ma
->new_family
= um
->new_family
;
1948 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1949 struct nlattr
**attrs
)
1951 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
1952 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
1953 struct xfrm_kmaddress km
, *kmp
;
1958 if (attrs
[XFRMA_MIGRATE
] == NULL
)
1961 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
1963 err
= copy_from_user_policy_type(&type
, attrs
);
1967 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
1974 xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
);
1979 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1980 struct nlattr
**attrs
)
1982 return -ENOPROTOOPT
;
1986 #ifdef CONFIG_XFRM_MIGRATE
1987 static int copy_to_user_migrate(struct xfrm_migrate
*m
, struct sk_buff
*skb
)
1989 struct xfrm_user_migrate um
;
1991 memset(&um
, 0, sizeof(um
));
1992 um
.proto
= m
->proto
;
1994 um
.reqid
= m
->reqid
;
1995 um
.old_family
= m
->old_family
;
1996 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
1997 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
1998 um
.new_family
= m
->new_family
;
1999 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
2000 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
2002 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
2005 static int copy_to_user_kmaddress(struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
2007 struct xfrm_user_kmaddress uk
;
2009 memset(&uk
, 0, sizeof(uk
));
2010 uk
.family
= k
->family
;
2011 uk
.reserved
= k
->reserved
;
2012 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
2013 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
2015 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2018 static inline size_t xfrm_migrate_msgsize(int num_migrate
, int with_kma
)
2020 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2021 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2022 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2023 + userpolicy_type_attrsize();
2026 static int build_migrate(struct sk_buff
*skb
, struct xfrm_migrate
*m
,
2027 int num_migrate
, struct xfrm_kmaddress
*k
,
2028 struct xfrm_selector
*sel
, u8 dir
, u8 type
)
2030 struct xfrm_migrate
*mp
;
2031 struct xfrm_userpolicy_id
*pol_id
;
2032 struct nlmsghdr
*nlh
;
2035 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2039 pol_id
= nlmsg_data(nlh
);
2040 /* copy data from selector, dir, and type to the pol_id */
2041 memset(pol_id
, 0, sizeof(*pol_id
));
2042 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2045 if (k
!= NULL
&& (copy_to_user_kmaddress(k
, skb
) < 0))
2048 if (copy_to_user_policy_type(type
, skb
) < 0)
2051 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2052 if (copy_to_user_migrate(mp
, skb
) < 0)
2056 return nlmsg_end(skb
, nlh
);
2058 nlmsg_cancel(skb
, nlh
);
2062 static int xfrm_send_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2063 struct xfrm_migrate
*m
, int num_migrate
,
2064 struct xfrm_kmaddress
*k
)
2066 struct net
*net
= &init_net
;
2067 struct sk_buff
*skb
;
2069 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
), GFP_ATOMIC
);
2074 if (build_migrate(skb
, m
, num_migrate
, k
, sel
, dir
, type
) < 0)
2077 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MIGRATE
, GFP_ATOMIC
);
2080 static int xfrm_send_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2081 struct xfrm_migrate
*m
, int num_migrate
,
2082 struct xfrm_kmaddress
*k
)
2084 return -ENOPROTOOPT
;
2088 #define XMSGSIZE(type) sizeof(struct type)
2090 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2091 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2092 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2093 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2094 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2095 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2096 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2097 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2098 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2099 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2100 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2101 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2102 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2103 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2104 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2105 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2106 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2107 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2108 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2109 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2110 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2115 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2116 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2117 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2118 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2119 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2120 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2121 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2122 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2123 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2124 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2125 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2126 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2127 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2128 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2129 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2130 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2131 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2132 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2133 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2134 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2135 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2136 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2137 [XFRMA_TFCPAD
] = { .type
= NLA_U32
},
2140 static struct xfrm_link
{
2141 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2142 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2143 int (*done
)(struct netlink_callback
*);
2144 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2145 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2146 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2147 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2148 .dump
= xfrm_dump_sa
,
2149 .done
= xfrm_dump_sa_done
},
2150 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2151 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2152 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2153 .dump
= xfrm_dump_policy
,
2154 .done
= xfrm_dump_policy_done
},
2155 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2156 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2157 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2158 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2159 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2160 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2161 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2162 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2163 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2164 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2165 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2166 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2167 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2170 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2172 struct net
*net
= sock_net(skb
->sk
);
2173 struct nlattr
*attrs
[XFRMA_MAX
+1];
2174 struct xfrm_link
*link
;
2177 type
= nlh
->nlmsg_type
;
2178 if (type
> XFRM_MSG_MAX
)
2181 type
-= XFRM_MSG_BASE
;
2182 link
= &xfrm_dispatch
[type
];
2184 /* All operations require privileges, even GET */
2185 if (security_netlink_recv(skb
, CAP_NET_ADMIN
))
2188 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2189 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2190 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2191 if (link
->dump
== NULL
)
2194 return netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, link
->dump
, link
->done
);
2197 err
= nlmsg_parse(nlh
, xfrm_msg_min
[type
], attrs
, XFRMA_MAX
,
2202 if (link
->doit
== NULL
)
2205 return link
->doit(skb
, nlh
, attrs
);
2208 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2210 mutex_lock(&xfrm_cfg_mutex
);
2211 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2212 mutex_unlock(&xfrm_cfg_mutex
);
2215 static inline size_t xfrm_expire_msgsize(void)
2217 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2218 + nla_total_size(sizeof(struct xfrm_mark
));
2221 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
2223 struct xfrm_user_expire
*ue
;
2224 struct nlmsghdr
*nlh
;
2226 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2230 ue
= nlmsg_data(nlh
);
2231 copy_to_user_state(x
, &ue
->state
);
2232 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2234 if (xfrm_mark_put(skb
, &x
->mark
))
2235 goto nla_put_failure
;
2237 return nlmsg_end(skb
, nlh
);
2243 static int xfrm_exp_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2245 struct net
*net
= xs_net(x
);
2246 struct sk_buff
*skb
;
2248 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2252 if (build_expire(skb
, x
, c
) < 0) {
2257 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2260 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2262 struct net
*net
= xs_net(x
);
2263 struct sk_buff
*skb
;
2265 skb
= nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC
);
2269 if (build_aevent(skb
, x
, c
) < 0)
2272 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
2275 static int xfrm_notify_sa_flush(struct km_event
*c
)
2277 struct net
*net
= c
->net
;
2278 struct xfrm_usersa_flush
*p
;
2279 struct nlmsghdr
*nlh
;
2280 struct sk_buff
*skb
;
2281 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2283 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2287 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2293 p
= nlmsg_data(nlh
);
2294 p
->proto
= c
->data
.proto
;
2296 nlmsg_end(skb
, nlh
);
2298 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2301 static inline size_t xfrm_sa_len(struct xfrm_state
*x
)
2305 l
+= nla_total_size(aead_len(x
->aead
));
2307 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2308 (x
->aalg
->alg_key_len
+ 7) / 8);
2309 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2312 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
2314 l
+= nla_total_size(sizeof(*x
->calg
));
2316 l
+= nla_total_size(sizeof(*x
->encap
));
2318 l
+= nla_total_size(sizeof(x
->tfcpad
));
2320 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
2321 x
->security
->ctx_len
);
2323 l
+= nla_total_size(sizeof(*x
->coaddr
));
2325 /* Must count x->lastused as it may become non-zero behind our back. */
2326 l
+= nla_total_size(sizeof(u64
));
2331 static int xfrm_notify_sa(struct xfrm_state
*x
, struct km_event
*c
)
2333 struct net
*net
= xs_net(x
);
2334 struct xfrm_usersa_info
*p
;
2335 struct xfrm_usersa_id
*id
;
2336 struct nlmsghdr
*nlh
;
2337 struct sk_buff
*skb
;
2338 int len
= xfrm_sa_len(x
);
2341 headlen
= sizeof(*p
);
2342 if (c
->event
== XFRM_MSG_DELSA
) {
2343 len
+= nla_total_size(headlen
);
2344 headlen
= sizeof(*id
);
2345 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2347 len
+= NLMSG_ALIGN(headlen
);
2349 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2353 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2355 goto nla_put_failure
;
2357 p
= nlmsg_data(nlh
);
2358 if (c
->event
== XFRM_MSG_DELSA
) {
2359 struct nlattr
*attr
;
2361 id
= nlmsg_data(nlh
);
2362 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2363 id
->spi
= x
->id
.spi
;
2364 id
->family
= x
->props
.family
;
2365 id
->proto
= x
->id
.proto
;
2367 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
2369 goto nla_put_failure
;
2374 if (copy_to_user_state_extra(x
, p
, skb
))
2375 goto nla_put_failure
;
2377 nlmsg_end(skb
, nlh
);
2379 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2382 /* Somebody screwed up with xfrm_sa_len! */
2388 static int xfrm_send_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2392 case XFRM_MSG_EXPIRE
:
2393 return xfrm_exp_state_notify(x
, c
);
2394 case XFRM_MSG_NEWAE
:
2395 return xfrm_aevent_state_notify(x
, c
);
2396 case XFRM_MSG_DELSA
:
2397 case XFRM_MSG_UPDSA
:
2398 case XFRM_MSG_NEWSA
:
2399 return xfrm_notify_sa(x
, c
);
2400 case XFRM_MSG_FLUSHSA
:
2401 return xfrm_notify_sa_flush(c
);
2403 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
2412 static inline size_t xfrm_acquire_msgsize(struct xfrm_state
*x
,
2413 struct xfrm_policy
*xp
)
2415 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
2416 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2417 + nla_total_size(sizeof(struct xfrm_mark
))
2418 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
2419 + userpolicy_type_attrsize();
2422 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2423 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
2426 struct xfrm_user_acquire
*ua
;
2427 struct nlmsghdr
*nlh
;
2428 __u32 seq
= xfrm_get_acqseq();
2430 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2434 ua
= nlmsg_data(nlh
);
2435 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2436 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2437 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2438 copy_to_user_policy(xp
, &ua
->policy
, dir
);
2439 ua
->aalgos
= xt
->aalgos
;
2440 ua
->ealgos
= xt
->ealgos
;
2441 ua
->calgos
= xt
->calgos
;
2442 ua
->seq
= x
->km
.seq
= seq
;
2444 if (copy_to_user_tmpl(xp
, skb
) < 0)
2446 if (copy_to_user_state_sec_ctx(x
, skb
))
2448 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2450 if (xfrm_mark_put(skb
, &xp
->mark
))
2451 goto nla_put_failure
;
2453 return nlmsg_end(skb
, nlh
);
2457 nlmsg_cancel(skb
, nlh
);
2461 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2462 struct xfrm_policy
*xp
, int dir
)
2464 struct net
*net
= xs_net(x
);
2465 struct sk_buff
*skb
;
2467 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
2471 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
2474 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
2477 /* User gives us xfrm_user_policy_info followed by an array of 0
2478 * or more templates.
2480 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2481 u8
*data
, int len
, int *dir
)
2483 struct net
*net
= sock_net(sk
);
2484 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2485 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2486 struct xfrm_policy
*xp
;
2489 switch (sk
->sk_family
) {
2491 if (opt
!= IP_XFRM_POLICY
) {
2496 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2498 if (opt
!= IPV6_XFRM_POLICY
) {
2511 if (len
< sizeof(*p
) ||
2512 verify_newpolicy_info(p
))
2515 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2516 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2519 if (p
->dir
> XFRM_POLICY_OUT
)
2522 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
2528 copy_from_user_policy(xp
, p
);
2529 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2530 copy_templates(xp
, ut
, nr
);
2537 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
2539 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
2540 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2541 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
2542 + nla_total_size(sizeof(struct xfrm_mark
))
2543 + userpolicy_type_attrsize();
2546 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2547 int dir
, struct km_event
*c
)
2549 struct xfrm_user_polexpire
*upe
;
2550 struct nlmsghdr
*nlh
;
2551 int hard
= c
->data
.hard
;
2553 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2557 upe
= nlmsg_data(nlh
);
2558 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2559 if (copy_to_user_tmpl(xp
, skb
) < 0)
2561 if (copy_to_user_sec_ctx(xp
, skb
))
2563 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2565 if (xfrm_mark_put(skb
, &xp
->mark
))
2566 goto nla_put_failure
;
2569 return nlmsg_end(skb
, nlh
);
2573 nlmsg_cancel(skb
, nlh
);
2577 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2579 struct net
*net
= xp_net(xp
);
2580 struct sk_buff
*skb
;
2582 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
2586 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2589 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2592 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2594 struct net
*net
= xp_net(xp
);
2595 struct xfrm_userpolicy_info
*p
;
2596 struct xfrm_userpolicy_id
*id
;
2597 struct nlmsghdr
*nlh
;
2598 struct sk_buff
*skb
;
2599 int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2602 headlen
= sizeof(*p
);
2603 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2604 len
+= nla_total_size(headlen
);
2605 headlen
= sizeof(*id
);
2607 len
+= userpolicy_type_attrsize();
2608 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2609 len
+= NLMSG_ALIGN(headlen
);
2611 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2615 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2619 p
= nlmsg_data(nlh
);
2620 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2621 struct nlattr
*attr
;
2623 id
= nlmsg_data(nlh
);
2624 memset(id
, 0, sizeof(*id
));
2627 id
->index
= xp
->index
;
2629 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2631 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
2638 copy_to_user_policy(xp
, p
, dir
);
2639 if (copy_to_user_tmpl(xp
, skb
) < 0)
2641 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2644 if (xfrm_mark_put(skb
, &xp
->mark
))
2645 goto nla_put_failure
;
2647 nlmsg_end(skb
, nlh
);
2649 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2657 static int xfrm_notify_policy_flush(struct km_event
*c
)
2659 struct net
*net
= c
->net
;
2660 struct nlmsghdr
*nlh
;
2661 struct sk_buff
*skb
;
2663 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
2667 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
2670 if (copy_to_user_policy_type(c
->data
.type
, skb
) < 0)
2673 nlmsg_end(skb
, nlh
);
2675 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2682 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2686 case XFRM_MSG_NEWPOLICY
:
2687 case XFRM_MSG_UPDPOLICY
:
2688 case XFRM_MSG_DELPOLICY
:
2689 return xfrm_notify_policy(xp
, dir
, c
);
2690 case XFRM_MSG_FLUSHPOLICY
:
2691 return xfrm_notify_policy_flush(c
);
2692 case XFRM_MSG_POLEXPIRE
:
2693 return xfrm_exp_policy_notify(xp
, dir
, c
);
2695 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
2703 static inline size_t xfrm_report_msgsize(void)
2705 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
2708 static int build_report(struct sk_buff
*skb
, u8 proto
,
2709 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2711 struct xfrm_user_report
*ur
;
2712 struct nlmsghdr
*nlh
;
2714 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
2718 ur
= nlmsg_data(nlh
);
2720 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2723 NLA_PUT(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2725 return nlmsg_end(skb
, nlh
);
2728 nlmsg_cancel(skb
, nlh
);
2732 static int xfrm_send_report(struct net
*net
, u8 proto
,
2733 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2735 struct sk_buff
*skb
;
2737 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
2741 if (build_report(skb
, proto
, sel
, addr
) < 0)
2744 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2747 static inline size_t xfrm_mapping_msgsize(void)
2749 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
2752 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
2753 xfrm_address_t
*new_saddr
, __be16 new_sport
)
2755 struct xfrm_user_mapping
*um
;
2756 struct nlmsghdr
*nlh
;
2758 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
2762 um
= nlmsg_data(nlh
);
2764 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
2765 um
->id
.spi
= x
->id
.spi
;
2766 um
->id
.family
= x
->props
.family
;
2767 um
->id
.proto
= x
->id
.proto
;
2768 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
2769 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
2770 um
->new_sport
= new_sport
;
2771 um
->old_sport
= x
->encap
->encap_sport
;
2772 um
->reqid
= x
->props
.reqid
;
2774 return nlmsg_end(skb
, nlh
);
2777 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
2780 struct net
*net
= xs_net(x
);
2781 struct sk_buff
*skb
;
2783 if (x
->id
.proto
!= IPPROTO_ESP
)
2789 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
2793 if (build_mapping(skb
, x
, ipaddr
, sport
) < 0)
2796 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MAPPING
, GFP_ATOMIC
);
2799 static struct xfrm_mgr netlink_mgr
= {
2801 .notify
= xfrm_send_state_notify
,
2802 .acquire
= xfrm_send_acquire
,
2803 .compile_policy
= xfrm_compile_policy
,
2804 .notify_policy
= xfrm_send_policy_notify
,
2805 .report
= xfrm_send_report
,
2806 .migrate
= xfrm_send_migrate
,
2807 .new_mapping
= xfrm_send_mapping
,
2810 static int __net_init
xfrm_user_net_init(struct net
*net
)
2814 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, XFRMNLGRP_MAX
,
2815 xfrm_netlink_rcv
, NULL
, THIS_MODULE
);
2818 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
2819 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
2823 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
2826 list_for_each_entry(net
, net_exit_list
, exit_list
)
2827 rcu_assign_pointer(net
->xfrm
.nlsk
, NULL
);
2829 list_for_each_entry(net
, net_exit_list
, exit_list
)
2830 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
2833 static struct pernet_operations xfrm_user_net_ops
= {
2834 .init
= xfrm_user_net_init
,
2835 .exit_batch
= xfrm_user_net_exit
,
2838 static int __init
xfrm_user_init(void)
2842 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
2844 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
2847 rv
= xfrm_register_km(&netlink_mgr
);
2849 unregister_pernet_subsys(&xfrm_user_net_ops
);
2853 static void __exit
xfrm_user_exit(void)
2855 xfrm_unregister_km(&netlink_mgr
);
2856 unregister_pernet_subsys(&xfrm_user_net_ops
);
2859 module_init(xfrm_user_init
);
2860 module_exit(xfrm_user_exit
);
2861 MODULE_LICENSE("GPL");
2862 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);