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
])
156 if (attrs
[XFRMA_ALG_COMP
])
158 if (!attrs
[XFRMA_ALG_AUTH
] &&
159 !attrs
[XFRMA_ALG_AUTH_TRUNC
] &&
160 !attrs
[XFRMA_ALG_CRYPT
] &&
161 !attrs
[XFRMA_ALG_AEAD
])
163 if ((attrs
[XFRMA_ALG_AUTH
] ||
164 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
165 attrs
[XFRMA_ALG_CRYPT
]) &&
166 attrs
[XFRMA_ALG_AEAD
])
171 if (!attrs
[XFRMA_ALG_COMP
] ||
172 attrs
[XFRMA_ALG_AEAD
] ||
173 attrs
[XFRMA_ALG_AUTH
] ||
174 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
175 attrs
[XFRMA_ALG_CRYPT
])
179 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
180 case IPPROTO_DSTOPTS
:
181 case IPPROTO_ROUTING
:
182 if (attrs
[XFRMA_ALG_COMP
] ||
183 attrs
[XFRMA_ALG_AUTH
] ||
184 attrs
[XFRMA_ALG_AUTH_TRUNC
] ||
185 attrs
[XFRMA_ALG_AEAD
] ||
186 attrs
[XFRMA_ALG_CRYPT
] ||
187 attrs
[XFRMA_ENCAP
] ||
188 attrs
[XFRMA_SEC_CTX
] ||
189 !attrs
[XFRMA_COADDR
])
198 if ((err
= verify_aead(attrs
)))
200 if ((err
= verify_auth_trunc(attrs
)))
202 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_AUTH
)))
204 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_CRYPT
)))
206 if ((err
= verify_one_alg(attrs
, XFRMA_ALG_COMP
)))
208 if ((err
= verify_sec_ctx_len(attrs
)))
213 case XFRM_MODE_TRANSPORT
:
214 case XFRM_MODE_TUNNEL
:
215 case XFRM_MODE_ROUTEOPTIMIZATION
:
229 static int attach_one_algo(struct xfrm_algo
**algpp
, u8
*props
,
230 struct xfrm_algo_desc
*(*get_byname
)(char *, int),
233 struct xfrm_algo
*p
, *ualg
;
234 struct xfrm_algo_desc
*algo
;
239 ualg
= nla_data(rta
);
241 algo
= get_byname(ualg
->alg_name
, 1);
244 *props
= algo
->desc
.sadb_alg_id
;
246 p
= kmemdup(ualg
, xfrm_alg_len(ualg
), GFP_KERNEL
);
250 strcpy(p
->alg_name
, algo
->name
);
255 static int attach_auth(struct xfrm_algo_auth
**algpp
, u8
*props
,
258 struct xfrm_algo
*ualg
;
259 struct xfrm_algo_auth
*p
;
260 struct xfrm_algo_desc
*algo
;
265 ualg
= nla_data(rta
);
267 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
270 *props
= algo
->desc
.sadb_alg_id
;
272 p
= kmalloc(sizeof(*p
) + (ualg
->alg_key_len
+ 7) / 8, GFP_KERNEL
);
276 strcpy(p
->alg_name
, algo
->name
);
277 p
->alg_key_len
= ualg
->alg_key_len
;
278 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
279 memcpy(p
->alg_key
, ualg
->alg_key
, (ualg
->alg_key_len
+ 7) / 8);
285 static int attach_auth_trunc(struct xfrm_algo_auth
**algpp
, u8
*props
,
288 struct xfrm_algo_auth
*p
, *ualg
;
289 struct xfrm_algo_desc
*algo
;
294 ualg
= nla_data(rta
);
296 algo
= xfrm_aalg_get_byname(ualg
->alg_name
, 1);
299 if (ualg
->alg_trunc_len
> algo
->uinfo
.auth
.icv_fullbits
)
301 *props
= algo
->desc
.sadb_alg_id
;
303 p
= kmemdup(ualg
, xfrm_alg_auth_len(ualg
), GFP_KERNEL
);
307 strcpy(p
->alg_name
, algo
->name
);
308 if (!p
->alg_trunc_len
)
309 p
->alg_trunc_len
= algo
->uinfo
.auth
.icv_truncbits
;
315 static int attach_aead(struct xfrm_algo_aead
**algpp
, u8
*props
,
318 struct xfrm_algo_aead
*p
, *ualg
;
319 struct xfrm_algo_desc
*algo
;
324 ualg
= nla_data(rta
);
326 algo
= xfrm_aead_get_byname(ualg
->alg_name
, ualg
->alg_icv_len
, 1);
329 *props
= algo
->desc
.sadb_alg_id
;
331 p
= kmemdup(ualg
, aead_len(ualg
), GFP_KERNEL
);
335 strcpy(p
->alg_name
, algo
->name
);
340 static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx
*xfrm_ctx
)
345 len
+= sizeof(struct xfrm_user_sec_ctx
);
346 len
+= xfrm_ctx
->ctx_len
;
351 static void copy_from_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
353 memcpy(&x
->id
, &p
->id
, sizeof(x
->id
));
354 memcpy(&x
->sel
, &p
->sel
, sizeof(x
->sel
));
355 memcpy(&x
->lft
, &p
->lft
, sizeof(x
->lft
));
356 x
->props
.mode
= p
->mode
;
357 x
->props
.replay_window
= p
->replay_window
;
358 x
->props
.reqid
= p
->reqid
;
359 x
->props
.family
= p
->family
;
360 memcpy(&x
->props
.saddr
, &p
->saddr
, sizeof(x
->props
.saddr
));
361 x
->props
.flags
= p
->flags
;
363 if (!x
->sel
.family
&& !(p
->flags
& XFRM_STATE_AF_UNSPEC
))
364 x
->sel
.family
= p
->family
;
368 * someday when pfkey also has support, we could have the code
369 * somehow made shareable and move it to xfrm_state.c - JHS
372 static void xfrm_update_ae_params(struct xfrm_state
*x
, struct nlattr
**attrs
)
374 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
375 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
376 struct nlattr
*et
= attrs
[XFRMA_ETIMER_THRESH
];
377 struct nlattr
*rt
= attrs
[XFRMA_REPLAY_THRESH
];
380 struct xfrm_replay_state
*replay
;
381 replay
= nla_data(rp
);
382 memcpy(&x
->replay
, replay
, sizeof(*replay
));
383 memcpy(&x
->preplay
, replay
, sizeof(*replay
));
387 struct xfrm_lifetime_cur
*ltime
;
388 ltime
= nla_data(lt
);
389 x
->curlft
.bytes
= ltime
->bytes
;
390 x
->curlft
.packets
= ltime
->packets
;
391 x
->curlft
.add_time
= ltime
->add_time
;
392 x
->curlft
.use_time
= ltime
->use_time
;
396 x
->replay_maxage
= nla_get_u32(et
);
399 x
->replay_maxdiff
= nla_get_u32(rt
);
402 static struct xfrm_state
*xfrm_state_construct(struct net
*net
,
403 struct xfrm_usersa_info
*p
,
404 struct nlattr
**attrs
,
407 struct xfrm_state
*x
= xfrm_state_alloc(net
);
413 copy_from_user_state(x
, p
);
415 if ((err
= attach_aead(&x
->aead
, &x
->props
.ealgo
,
416 attrs
[XFRMA_ALG_AEAD
])))
418 if ((err
= attach_auth_trunc(&x
->aalg
, &x
->props
.aalgo
,
419 attrs
[XFRMA_ALG_AUTH_TRUNC
])))
421 if (!x
->props
.aalgo
) {
422 if ((err
= attach_auth(&x
->aalg
, &x
->props
.aalgo
,
423 attrs
[XFRMA_ALG_AUTH
])))
426 if ((err
= attach_one_algo(&x
->ealg
, &x
->props
.ealgo
,
427 xfrm_ealg_get_byname
,
428 attrs
[XFRMA_ALG_CRYPT
])))
430 if ((err
= attach_one_algo(&x
->calg
, &x
->props
.calgo
,
431 xfrm_calg_get_byname
,
432 attrs
[XFRMA_ALG_COMP
])))
435 if (attrs
[XFRMA_ENCAP
]) {
436 x
->encap
= kmemdup(nla_data(attrs
[XFRMA_ENCAP
]),
437 sizeof(*x
->encap
), GFP_KERNEL
);
438 if (x
->encap
== NULL
)
442 if (attrs
[XFRMA_COADDR
]) {
443 x
->coaddr
= kmemdup(nla_data(attrs
[XFRMA_COADDR
]),
444 sizeof(*x
->coaddr
), GFP_KERNEL
);
445 if (x
->coaddr
== NULL
)
449 xfrm_mark_get(attrs
, &x
->mark
);
451 err
= xfrm_init_state(x
);
455 if (attrs
[XFRMA_SEC_CTX
] &&
456 security_xfrm_state_alloc(x
, nla_data(attrs
[XFRMA_SEC_CTX
])))
460 x
->replay_maxdiff
= net
->xfrm
.sysctl_aevent_rseqth
;
461 /* sysctl_xfrm_aevent_etime is in 100ms units */
462 x
->replay_maxage
= (net
->xfrm
.sysctl_aevent_etime
*HZ
)/XFRM_AE_ETH_M
;
463 x
->preplay
.bitmap
= 0;
464 x
->preplay
.seq
= x
->replay
.seq
+x
->replay_maxdiff
;
465 x
->preplay
.oseq
= x
->replay
.oseq
+x
->replay_maxdiff
;
467 /* override default values from above */
469 xfrm_update_ae_params(x
, attrs
);
474 x
->km
.state
= XFRM_STATE_DEAD
;
481 static int xfrm_add_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
482 struct nlattr
**attrs
)
484 struct net
*net
= sock_net(skb
->sk
);
485 struct xfrm_usersa_info
*p
= nlmsg_data(nlh
);
486 struct xfrm_state
*x
;
489 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
490 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
491 u32 sid
= NETLINK_CB(skb
).sid
;
493 err
= verify_newsa_info(p
, attrs
);
497 x
= xfrm_state_construct(net
, p
, attrs
, &err
);
502 if (nlh
->nlmsg_type
== XFRM_MSG_NEWSA
)
503 err
= xfrm_state_add(x
);
505 err
= xfrm_state_update(x
);
507 xfrm_audit_state_add(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
510 x
->km
.state
= XFRM_STATE_DEAD
;
515 c
.seq
= nlh
->nlmsg_seq
;
516 c
.pid
= nlh
->nlmsg_pid
;
517 c
.event
= nlh
->nlmsg_type
;
519 km_state_notify(x
, &c
);
525 static struct xfrm_state
*xfrm_user_state_lookup(struct net
*net
,
526 struct xfrm_usersa_id
*p
,
527 struct nlattr
**attrs
,
530 struct xfrm_state
*x
= NULL
;
533 u32 mark
= xfrm_mark_get(attrs
, &m
);
535 if (xfrm_id_proto_match(p
->proto
, IPSEC_PROTO_ANY
)) {
537 x
= xfrm_state_lookup(net
, mark
, &p
->daddr
, p
->spi
, p
->proto
, p
->family
);
539 xfrm_address_t
*saddr
= NULL
;
541 verify_one_addr(attrs
, XFRMA_SRCADDR
, &saddr
);
548 x
= xfrm_state_lookup_byaddr(net
, mark
,
550 p
->proto
, p
->family
);
559 static int xfrm_del_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
560 struct nlattr
**attrs
)
562 struct net
*net
= sock_net(skb
->sk
);
563 struct xfrm_state
*x
;
566 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
567 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
568 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
569 u32 sid
= NETLINK_CB(skb
).sid
;
571 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
575 if ((err
= security_xfrm_state_delete(x
)) != 0)
578 if (xfrm_state_kern(x
)) {
583 err
= xfrm_state_delete(x
);
588 c
.seq
= nlh
->nlmsg_seq
;
589 c
.pid
= nlh
->nlmsg_pid
;
590 c
.event
= nlh
->nlmsg_type
;
591 km_state_notify(x
, &c
);
594 xfrm_audit_state_delete(x
, err
? 0 : 1, loginuid
, sessionid
, sid
);
599 static void copy_to_user_state(struct xfrm_state
*x
, struct xfrm_usersa_info
*p
)
601 memcpy(&p
->id
, &x
->id
, sizeof(p
->id
));
602 memcpy(&p
->sel
, &x
->sel
, sizeof(p
->sel
));
603 memcpy(&p
->lft
, &x
->lft
, sizeof(p
->lft
));
604 memcpy(&p
->curlft
, &x
->curlft
, sizeof(p
->curlft
));
605 memcpy(&p
->stats
, &x
->stats
, sizeof(p
->stats
));
606 memcpy(&p
->saddr
, &x
->props
.saddr
, sizeof(p
->saddr
));
607 p
->mode
= x
->props
.mode
;
608 p
->replay_window
= x
->props
.replay_window
;
609 p
->reqid
= x
->props
.reqid
;
610 p
->family
= x
->props
.family
;
611 p
->flags
= x
->props
.flags
;
615 struct xfrm_dump_info
{
616 struct sk_buff
*in_skb
;
617 struct sk_buff
*out_skb
;
622 static int copy_sec_ctx(struct xfrm_sec_ctx
*s
, struct sk_buff
*skb
)
624 struct xfrm_user_sec_ctx
*uctx
;
626 int ctx_size
= sizeof(*uctx
) + s
->ctx_len
;
628 attr
= nla_reserve(skb
, XFRMA_SEC_CTX
, ctx_size
);
632 uctx
= nla_data(attr
);
633 uctx
->exttype
= XFRMA_SEC_CTX
;
634 uctx
->len
= ctx_size
;
635 uctx
->ctx_doi
= s
->ctx_doi
;
636 uctx
->ctx_alg
= s
->ctx_alg
;
637 uctx
->ctx_len
= s
->ctx_len
;
638 memcpy(uctx
+ 1, s
->ctx_str
, s
->ctx_len
);
643 static int copy_to_user_auth(struct xfrm_algo_auth
*auth
, struct sk_buff
*skb
)
645 struct xfrm_algo
*algo
;
648 nla
= nla_reserve(skb
, XFRMA_ALG_AUTH
,
649 sizeof(*algo
) + (auth
->alg_key_len
+ 7) / 8);
653 algo
= nla_data(nla
);
654 strcpy(algo
->alg_name
, auth
->alg_name
);
655 memcpy(algo
->alg_key
, auth
->alg_key
, (auth
->alg_key_len
+ 7) / 8);
656 algo
->alg_key_len
= auth
->alg_key_len
;
661 /* Don't change this without updating xfrm_sa_len! */
662 static int copy_to_user_state_extra(struct xfrm_state
*x
,
663 struct xfrm_usersa_info
*p
,
666 copy_to_user_state(x
, p
);
669 NLA_PUT(skb
, XFRMA_COADDR
, sizeof(*x
->coaddr
), x
->coaddr
);
672 NLA_PUT_U64(skb
, XFRMA_LASTUSED
, x
->lastused
);
675 NLA_PUT(skb
, XFRMA_ALG_AEAD
, aead_len(x
->aead
), x
->aead
);
677 if (copy_to_user_auth(x
->aalg
, skb
))
678 goto nla_put_failure
;
680 NLA_PUT(skb
, XFRMA_ALG_AUTH_TRUNC
,
681 xfrm_alg_auth_len(x
->aalg
), x
->aalg
);
684 NLA_PUT(skb
, XFRMA_ALG_CRYPT
, xfrm_alg_len(x
->ealg
), x
->ealg
);
686 NLA_PUT(skb
, XFRMA_ALG_COMP
, sizeof(*(x
->calg
)), x
->calg
);
689 NLA_PUT(skb
, XFRMA_ENCAP
, sizeof(*x
->encap
), x
->encap
);
691 if (xfrm_mark_put(skb
, &x
->mark
))
692 goto nla_put_failure
;
694 if (x
->security
&& copy_sec_ctx(x
->security
, skb
) < 0)
695 goto nla_put_failure
;
703 static int dump_one_state(struct xfrm_state
*x
, int count
, void *ptr
)
705 struct xfrm_dump_info
*sp
= ptr
;
706 struct sk_buff
*in_skb
= sp
->in_skb
;
707 struct sk_buff
*skb
= sp
->out_skb
;
708 struct xfrm_usersa_info
*p
;
709 struct nlmsghdr
*nlh
;
712 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
713 XFRM_MSG_NEWSA
, sizeof(*p
), sp
->nlmsg_flags
);
719 err
= copy_to_user_state_extra(x
, p
, skb
);
721 goto nla_put_failure
;
727 nlmsg_cancel(skb
, nlh
);
731 static int xfrm_dump_sa_done(struct netlink_callback
*cb
)
733 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
734 xfrm_state_walk_done(walk
);
738 static int xfrm_dump_sa(struct sk_buff
*skb
, struct netlink_callback
*cb
)
740 struct net
*net
= sock_net(skb
->sk
);
741 struct xfrm_state_walk
*walk
= (struct xfrm_state_walk
*) &cb
->args
[1];
742 struct xfrm_dump_info info
;
744 BUILD_BUG_ON(sizeof(struct xfrm_state_walk
) >
745 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
747 info
.in_skb
= cb
->skb
;
749 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
750 info
.nlmsg_flags
= NLM_F_MULTI
;
754 xfrm_state_walk_init(walk
, 0);
757 (void) xfrm_state_walk(net
, walk
, dump_one_state
, &info
);
762 static struct sk_buff
*xfrm_state_netlink(struct sk_buff
*in_skb
,
763 struct xfrm_state
*x
, u32 seq
)
765 struct xfrm_dump_info info
;
768 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_ATOMIC
);
770 return ERR_PTR(-ENOMEM
);
772 info
.in_skb
= in_skb
;
774 info
.nlmsg_seq
= seq
;
775 info
.nlmsg_flags
= 0;
777 if (dump_one_state(x
, 0, &info
)) {
785 static inline size_t xfrm_spdinfo_msgsize(void)
787 return NLMSG_ALIGN(4)
788 + nla_total_size(sizeof(struct xfrmu_spdinfo
))
789 + nla_total_size(sizeof(struct xfrmu_spdhinfo
));
792 static int build_spdinfo(struct sk_buff
*skb
, struct net
*net
,
793 u32 pid
, u32 seq
, u32 flags
)
795 struct xfrmk_spdinfo si
;
796 struct xfrmu_spdinfo spc
;
797 struct xfrmu_spdhinfo sph
;
798 struct nlmsghdr
*nlh
;
801 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSPDINFO
, sizeof(u32
), 0);
802 if (nlh
== NULL
) /* shouldnt really happen ... */
807 xfrm_spd_getinfo(net
, &si
);
808 spc
.incnt
= si
.incnt
;
809 spc
.outcnt
= si
.outcnt
;
810 spc
.fwdcnt
= si
.fwdcnt
;
811 spc
.inscnt
= si
.inscnt
;
812 spc
.outscnt
= si
.outscnt
;
813 spc
.fwdscnt
= si
.fwdscnt
;
814 sph
.spdhcnt
= si
.spdhcnt
;
815 sph
.spdhmcnt
= si
.spdhmcnt
;
817 NLA_PUT(skb
, XFRMA_SPD_INFO
, sizeof(spc
), &spc
);
818 NLA_PUT(skb
, XFRMA_SPD_HINFO
, sizeof(sph
), &sph
);
820 return nlmsg_end(skb
, nlh
);
823 nlmsg_cancel(skb
, nlh
);
827 static int xfrm_get_spdinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
828 struct nlattr
**attrs
)
830 struct net
*net
= sock_net(skb
->sk
);
831 struct sk_buff
*r_skb
;
832 u32
*flags
= nlmsg_data(nlh
);
833 u32 spid
= NETLINK_CB(skb
).pid
;
834 u32 seq
= nlh
->nlmsg_seq
;
836 r_skb
= nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC
);
840 if (build_spdinfo(r_skb
, net
, spid
, seq
, *flags
) < 0)
843 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, spid
);
846 static inline size_t xfrm_sadinfo_msgsize(void)
848 return NLMSG_ALIGN(4)
849 + nla_total_size(sizeof(struct xfrmu_sadhinfo
))
850 + nla_total_size(4); /* XFRMA_SAD_CNT */
853 static int build_sadinfo(struct sk_buff
*skb
, struct net
*net
,
854 u32 pid
, u32 seq
, u32 flags
)
856 struct xfrmk_sadinfo si
;
857 struct xfrmu_sadhinfo sh
;
858 struct nlmsghdr
*nlh
;
861 nlh
= nlmsg_put(skb
, pid
, seq
, XFRM_MSG_NEWSADINFO
, sizeof(u32
), 0);
862 if (nlh
== NULL
) /* shouldnt really happen ... */
867 xfrm_sad_getinfo(net
, &si
);
869 sh
.sadhmcnt
= si
.sadhmcnt
;
870 sh
.sadhcnt
= si
.sadhcnt
;
872 NLA_PUT_U32(skb
, XFRMA_SAD_CNT
, si
.sadcnt
);
873 NLA_PUT(skb
, XFRMA_SAD_HINFO
, sizeof(sh
), &sh
);
875 return nlmsg_end(skb
, nlh
);
878 nlmsg_cancel(skb
, nlh
);
882 static int xfrm_get_sadinfo(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
883 struct nlattr
**attrs
)
885 struct net
*net
= sock_net(skb
->sk
);
886 struct sk_buff
*r_skb
;
887 u32
*flags
= nlmsg_data(nlh
);
888 u32 spid
= NETLINK_CB(skb
).pid
;
889 u32 seq
= nlh
->nlmsg_seq
;
891 r_skb
= nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC
);
895 if (build_sadinfo(r_skb
, net
, spid
, seq
, *flags
) < 0)
898 return nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, spid
);
901 static int xfrm_get_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
902 struct nlattr
**attrs
)
904 struct net
*net
= sock_net(skb
->sk
);
905 struct xfrm_usersa_id
*p
= nlmsg_data(nlh
);
906 struct xfrm_state
*x
;
907 struct sk_buff
*resp_skb
;
910 x
= xfrm_user_state_lookup(net
, p
, attrs
, &err
);
914 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
915 if (IS_ERR(resp_skb
)) {
916 err
= PTR_ERR(resp_skb
);
918 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).pid
);
925 static int verify_userspi_info(struct xfrm_userspi_info
*p
)
927 switch (p
->info
.id
.proto
) {
933 /* IPCOMP spi is 16-bits. */
934 if (p
->max
>= 0x10000)
948 static int xfrm_alloc_userspi(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
949 struct nlattr
**attrs
)
951 struct net
*net
= sock_net(skb
->sk
);
952 struct xfrm_state
*x
;
953 struct xfrm_userspi_info
*p
;
954 struct sk_buff
*resp_skb
;
955 xfrm_address_t
*daddr
;
962 err
= verify_userspi_info(p
);
966 family
= p
->info
.family
;
967 daddr
= &p
->info
.id
.daddr
;
971 mark
= xfrm_mark_get(attrs
, &m
);
973 x
= xfrm_find_acq_byseq(net
, mark
, p
->info
.seq
);
974 if (x
&& xfrm_addr_cmp(&x
->id
.daddr
, daddr
, family
)) {
981 x
= xfrm_find_acq(net
, &m
, p
->info
.mode
, p
->info
.reqid
,
982 p
->info
.id
.proto
, daddr
,
989 err
= xfrm_alloc_spi(x
, p
->min
, p
->max
);
993 resp_skb
= xfrm_state_netlink(skb
, x
, nlh
->nlmsg_seq
);
994 if (IS_ERR(resp_skb
)) {
995 err
= PTR_ERR(resp_skb
);
999 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
, NETLINK_CB(skb
).pid
);
1007 static int verify_policy_dir(u8 dir
)
1010 case XFRM_POLICY_IN
:
1011 case XFRM_POLICY_OUT
:
1012 case XFRM_POLICY_FWD
:
1022 static int verify_policy_type(u8 type
)
1025 case XFRM_POLICY_TYPE_MAIN
:
1026 #ifdef CONFIG_XFRM_SUB_POLICY
1027 case XFRM_POLICY_TYPE_SUB
:
1038 static int verify_newpolicy_info(struct xfrm_userpolicy_info
*p
)
1041 case XFRM_SHARE_ANY
:
1042 case XFRM_SHARE_SESSION
:
1043 case XFRM_SHARE_USER
:
1044 case XFRM_SHARE_UNIQUE
:
1051 switch (p
->action
) {
1052 case XFRM_POLICY_ALLOW
:
1053 case XFRM_POLICY_BLOCK
:
1060 switch (p
->sel
.family
) {
1065 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1068 return -EAFNOSUPPORT
;
1075 return verify_policy_dir(p
->dir
);
1078 static int copy_from_user_sec_ctx(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1080 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1081 struct xfrm_user_sec_ctx
*uctx
;
1086 uctx
= nla_data(rt
);
1087 return security_xfrm_policy_alloc(&pol
->security
, uctx
);
1090 static void copy_templates(struct xfrm_policy
*xp
, struct xfrm_user_tmpl
*ut
,
1096 for (i
= 0; i
< nr
; i
++, ut
++) {
1097 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1099 memcpy(&t
->id
, &ut
->id
, sizeof(struct xfrm_id
));
1100 memcpy(&t
->saddr
, &ut
->saddr
,
1101 sizeof(xfrm_address_t
));
1102 t
->reqid
= ut
->reqid
;
1104 t
->share
= ut
->share
;
1105 t
->optional
= ut
->optional
;
1106 t
->aalgos
= ut
->aalgos
;
1107 t
->ealgos
= ut
->ealgos
;
1108 t
->calgos
= ut
->calgos
;
1109 /* If all masks are ~0, then we allow all algorithms. */
1110 t
->allalgs
= !~(t
->aalgos
& t
->ealgos
& t
->calgos
);
1111 t
->encap_family
= ut
->family
;
1115 static int validate_tmpl(int nr
, struct xfrm_user_tmpl
*ut
, u16 family
)
1119 if (nr
> XFRM_MAX_DEPTH
)
1122 for (i
= 0; i
< nr
; i
++) {
1123 /* We never validated the ut->family value, so many
1124 * applications simply leave it at zero. The check was
1125 * never made and ut->family was ignored because all
1126 * templates could be assumed to have the same family as
1127 * the policy itself. Now that we will have ipv4-in-ipv6
1128 * and ipv6-in-ipv4 tunnels, this is no longer true.
1131 ut
[i
].family
= family
;
1133 switch (ut
[i
].family
) {
1136 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1148 static int copy_from_user_tmpl(struct xfrm_policy
*pol
, struct nlattr
**attrs
)
1150 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1155 struct xfrm_user_tmpl
*utmpl
= nla_data(rt
);
1156 int nr
= nla_len(rt
) / sizeof(*utmpl
);
1159 err
= validate_tmpl(nr
, utmpl
, pol
->family
);
1163 copy_templates(pol
, utmpl
, nr
);
1168 static int copy_from_user_policy_type(u8
*tp
, struct nlattr
**attrs
)
1170 struct nlattr
*rt
= attrs
[XFRMA_POLICY_TYPE
];
1171 struct xfrm_userpolicy_type
*upt
;
1172 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1180 err
= verify_policy_type(type
);
1188 static void copy_from_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
)
1190 xp
->priority
= p
->priority
;
1191 xp
->index
= p
->index
;
1192 memcpy(&xp
->selector
, &p
->sel
, sizeof(xp
->selector
));
1193 memcpy(&xp
->lft
, &p
->lft
, sizeof(xp
->lft
));
1194 xp
->action
= p
->action
;
1195 xp
->flags
= p
->flags
;
1196 xp
->family
= p
->sel
.family
;
1199 static void copy_to_user_policy(struct xfrm_policy
*xp
, struct xfrm_userpolicy_info
*p
, int dir
)
1201 memcpy(&p
->sel
, &xp
->selector
, sizeof(p
->sel
));
1202 memcpy(&p
->lft
, &xp
->lft
, sizeof(p
->lft
));
1203 memcpy(&p
->curlft
, &xp
->curlft
, sizeof(p
->curlft
));
1204 p
->priority
= xp
->priority
;
1205 p
->index
= xp
->index
;
1206 p
->sel
.family
= xp
->family
;
1208 p
->action
= xp
->action
;
1209 p
->flags
= xp
->flags
;
1210 p
->share
= XFRM_SHARE_ANY
;
1213 static struct xfrm_policy
*xfrm_policy_construct(struct net
*net
, struct xfrm_userpolicy_info
*p
, struct nlattr
**attrs
, int *errp
)
1215 struct xfrm_policy
*xp
= xfrm_policy_alloc(net
, GFP_KERNEL
);
1223 copy_from_user_policy(xp
, p
);
1225 err
= copy_from_user_policy_type(&xp
->type
, attrs
);
1229 if (!(err
= copy_from_user_tmpl(xp
, attrs
)))
1230 err
= copy_from_user_sec_ctx(xp
, attrs
);
1234 xfrm_mark_get(attrs
, &xp
->mark
);
1240 xfrm_policy_destroy(xp
);
1244 static int xfrm_add_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1245 struct nlattr
**attrs
)
1247 struct net
*net
= sock_net(skb
->sk
);
1248 struct xfrm_userpolicy_info
*p
= nlmsg_data(nlh
);
1249 struct xfrm_policy
*xp
;
1253 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1254 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
1255 u32 sid
= NETLINK_CB(skb
).sid
;
1257 err
= verify_newpolicy_info(p
);
1260 err
= verify_sec_ctx_len(attrs
);
1264 xp
= xfrm_policy_construct(net
, p
, attrs
, &err
);
1268 /* shouldnt excl be based on nlh flags??
1269 * Aha! this is anti-netlink really i.e more pfkey derived
1270 * in netlink excl is a flag and you wouldnt need
1271 * a type XFRM_MSG_UPDPOLICY - JHS */
1272 excl
= nlh
->nlmsg_type
== XFRM_MSG_NEWPOLICY
;
1273 err
= xfrm_policy_insert(p
->dir
, xp
, excl
);
1274 xfrm_audit_policy_add(xp
, err
? 0 : 1, loginuid
, sessionid
, sid
);
1277 security_xfrm_policy_free(xp
->security
);
1282 c
.event
= nlh
->nlmsg_type
;
1283 c
.seq
= nlh
->nlmsg_seq
;
1284 c
.pid
= nlh
->nlmsg_pid
;
1285 km_policy_notify(xp
, p
->dir
, &c
);
1292 static int copy_to_user_tmpl(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1294 struct xfrm_user_tmpl vec
[XFRM_MAX_DEPTH
];
1297 if (xp
->xfrm_nr
== 0)
1300 for (i
= 0; i
< xp
->xfrm_nr
; i
++) {
1301 struct xfrm_user_tmpl
*up
= &vec
[i
];
1302 struct xfrm_tmpl
*kp
= &xp
->xfrm_vec
[i
];
1304 memcpy(&up
->id
, &kp
->id
, sizeof(up
->id
));
1305 up
->family
= kp
->encap_family
;
1306 memcpy(&up
->saddr
, &kp
->saddr
, sizeof(up
->saddr
));
1307 up
->reqid
= kp
->reqid
;
1308 up
->mode
= kp
->mode
;
1309 up
->share
= kp
->share
;
1310 up
->optional
= kp
->optional
;
1311 up
->aalgos
= kp
->aalgos
;
1312 up
->ealgos
= kp
->ealgos
;
1313 up
->calgos
= kp
->calgos
;
1316 return nla_put(skb
, XFRMA_TMPL
,
1317 sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
, vec
);
1320 static inline int copy_to_user_state_sec_ctx(struct xfrm_state
*x
, struct sk_buff
*skb
)
1323 return copy_sec_ctx(x
->security
, skb
);
1328 static inline int copy_to_user_sec_ctx(struct xfrm_policy
*xp
, struct sk_buff
*skb
)
1331 return copy_sec_ctx(xp
->security
, skb
);
1335 static inline size_t userpolicy_type_attrsize(void)
1337 #ifdef CONFIG_XFRM_SUB_POLICY
1338 return nla_total_size(sizeof(struct xfrm_userpolicy_type
));
1344 #ifdef CONFIG_XFRM_SUB_POLICY
1345 static int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1347 struct xfrm_userpolicy_type upt
= {
1351 return nla_put(skb
, XFRMA_POLICY_TYPE
, sizeof(upt
), &upt
);
1355 static inline int copy_to_user_policy_type(u8 type
, struct sk_buff
*skb
)
1361 static int dump_one_policy(struct xfrm_policy
*xp
, int dir
, int count
, void *ptr
)
1363 struct xfrm_dump_info
*sp
= ptr
;
1364 struct xfrm_userpolicy_info
*p
;
1365 struct sk_buff
*in_skb
= sp
->in_skb
;
1366 struct sk_buff
*skb
= sp
->out_skb
;
1367 struct nlmsghdr
*nlh
;
1369 nlh
= nlmsg_put(skb
, NETLINK_CB(in_skb
).pid
, sp
->nlmsg_seq
,
1370 XFRM_MSG_NEWPOLICY
, sizeof(*p
), sp
->nlmsg_flags
);
1374 p
= nlmsg_data(nlh
);
1375 copy_to_user_policy(xp
, p
, dir
);
1376 if (copy_to_user_tmpl(xp
, skb
) < 0)
1378 if (copy_to_user_sec_ctx(xp
, skb
))
1380 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
1382 if (xfrm_mark_put(skb
, &xp
->mark
))
1383 goto nla_put_failure
;
1385 nlmsg_end(skb
, nlh
);
1390 nlmsg_cancel(skb
, nlh
);
1394 static int xfrm_dump_policy_done(struct netlink_callback
*cb
)
1396 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1398 xfrm_policy_walk_done(walk
);
1402 static int xfrm_dump_policy(struct sk_buff
*skb
, struct netlink_callback
*cb
)
1404 struct net
*net
= sock_net(skb
->sk
);
1405 struct xfrm_policy_walk
*walk
= (struct xfrm_policy_walk
*) &cb
->args
[1];
1406 struct xfrm_dump_info info
;
1408 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk
) >
1409 sizeof(cb
->args
) - sizeof(cb
->args
[0]));
1411 info
.in_skb
= cb
->skb
;
1413 info
.nlmsg_seq
= cb
->nlh
->nlmsg_seq
;
1414 info
.nlmsg_flags
= NLM_F_MULTI
;
1418 xfrm_policy_walk_init(walk
, XFRM_POLICY_TYPE_ANY
);
1421 (void) xfrm_policy_walk(net
, walk
, dump_one_policy
, &info
);
1426 static struct sk_buff
*xfrm_policy_netlink(struct sk_buff
*in_skb
,
1427 struct xfrm_policy
*xp
,
1430 struct xfrm_dump_info info
;
1431 struct sk_buff
*skb
;
1433 skb
= nlmsg_new(NLMSG_DEFAULT_SIZE
, GFP_KERNEL
);
1435 return ERR_PTR(-ENOMEM
);
1437 info
.in_skb
= in_skb
;
1439 info
.nlmsg_seq
= seq
;
1440 info
.nlmsg_flags
= 0;
1442 if (dump_one_policy(xp
, dir
, 0, &info
) < 0) {
1450 static int xfrm_get_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1451 struct nlattr
**attrs
)
1453 struct net
*net
= sock_net(skb
->sk
);
1454 struct xfrm_policy
*xp
;
1455 struct xfrm_userpolicy_id
*p
;
1456 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1461 u32 mark
= xfrm_mark_get(attrs
, &m
);
1463 p
= nlmsg_data(nlh
);
1464 delete = nlh
->nlmsg_type
== XFRM_MSG_DELPOLICY
;
1466 err
= copy_from_user_policy_type(&type
, attrs
);
1470 err
= verify_policy_dir(p
->dir
);
1475 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, delete, &err
);
1477 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1478 struct xfrm_sec_ctx
*ctx
;
1480 err
= verify_sec_ctx_len(attrs
);
1486 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1488 err
= security_xfrm_policy_alloc(&ctx
, uctx
);
1492 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
, &p
->sel
,
1494 security_xfrm_policy_free(ctx
);
1500 struct sk_buff
*resp_skb
;
1502 resp_skb
= xfrm_policy_netlink(skb
, xp
, p
->dir
, nlh
->nlmsg_seq
);
1503 if (IS_ERR(resp_skb
)) {
1504 err
= PTR_ERR(resp_skb
);
1506 err
= nlmsg_unicast(net
->xfrm
.nlsk
, resp_skb
,
1507 NETLINK_CB(skb
).pid
);
1510 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1511 u32 sessionid
= NETLINK_CB(skb
).sessionid
;
1512 u32 sid
= NETLINK_CB(skb
).sid
;
1514 xfrm_audit_policy_delete(xp
, err
? 0 : 1, loginuid
, sessionid
,
1520 c
.data
.byid
= p
->index
;
1521 c
.event
= nlh
->nlmsg_type
;
1522 c
.seq
= nlh
->nlmsg_seq
;
1523 c
.pid
= nlh
->nlmsg_pid
;
1524 km_policy_notify(xp
, p
->dir
, &c
);
1532 static int xfrm_flush_sa(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1533 struct nlattr
**attrs
)
1535 struct net
*net
= sock_net(skb
->sk
);
1537 struct xfrm_usersa_flush
*p
= nlmsg_data(nlh
);
1538 struct xfrm_audit audit_info
;
1541 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1542 audit_info
.sessionid
= NETLINK_CB(skb
).sessionid
;
1543 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1544 err
= xfrm_state_flush(net
, p
->proto
, &audit_info
);
1546 if (err
== -ESRCH
) /* empty table */
1550 c
.data
.proto
= p
->proto
;
1551 c
.event
= nlh
->nlmsg_type
;
1552 c
.seq
= nlh
->nlmsg_seq
;
1553 c
.pid
= nlh
->nlmsg_pid
;
1555 km_state_notify(NULL
, &c
);
1560 static inline size_t xfrm_aevent_msgsize(void)
1562 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id
))
1563 + nla_total_size(sizeof(struct xfrm_replay_state
))
1564 + nla_total_size(sizeof(struct xfrm_lifetime_cur
))
1565 + nla_total_size(sizeof(struct xfrm_mark
))
1566 + nla_total_size(4) /* XFRM_AE_RTHR */
1567 + nla_total_size(4); /* XFRM_AE_ETHR */
1570 static int build_aevent(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
1572 struct xfrm_aevent_id
*id
;
1573 struct nlmsghdr
*nlh
;
1575 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_NEWAE
, sizeof(*id
), 0);
1579 id
= nlmsg_data(nlh
);
1580 memcpy(&id
->sa_id
.daddr
, &x
->id
.daddr
,sizeof(x
->id
.daddr
));
1581 id
->sa_id
.spi
= x
->id
.spi
;
1582 id
->sa_id
.family
= x
->props
.family
;
1583 id
->sa_id
.proto
= x
->id
.proto
;
1584 memcpy(&id
->saddr
, &x
->props
.saddr
,sizeof(x
->props
.saddr
));
1585 id
->reqid
= x
->props
.reqid
;
1586 id
->flags
= c
->data
.aevent
;
1588 NLA_PUT(skb
, XFRMA_REPLAY_VAL
, sizeof(x
->replay
), &x
->replay
);
1589 NLA_PUT(skb
, XFRMA_LTIME_VAL
, sizeof(x
->curlft
), &x
->curlft
);
1591 if (id
->flags
& XFRM_AE_RTHR
)
1592 NLA_PUT_U32(skb
, XFRMA_REPLAY_THRESH
, x
->replay_maxdiff
);
1594 if (id
->flags
& XFRM_AE_ETHR
)
1595 NLA_PUT_U32(skb
, XFRMA_ETIMER_THRESH
,
1596 x
->replay_maxage
* 10 / HZ
);
1598 if (xfrm_mark_put(skb
, &x
->mark
))
1599 goto nla_put_failure
;
1601 return nlmsg_end(skb
, nlh
);
1604 nlmsg_cancel(skb
, nlh
);
1608 static int xfrm_get_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1609 struct nlattr
**attrs
)
1611 struct net
*net
= sock_net(skb
->sk
);
1612 struct xfrm_state
*x
;
1613 struct sk_buff
*r_skb
;
1618 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1619 struct xfrm_usersa_id
*id
= &p
->sa_id
;
1621 r_skb
= nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC
);
1625 mark
= xfrm_mark_get(attrs
, &m
);
1627 x
= xfrm_state_lookup(net
, mark
, &id
->daddr
, id
->spi
, id
->proto
, id
->family
);
1633 spin_lock_bh(&x
->lock
);
1634 c
.data
.aevent
= p
->flags
;
1635 c
.seq
= nlh
->nlmsg_seq
;
1636 c
.pid
= nlh
->nlmsg_pid
;
1638 if (build_aevent(r_skb
, x
, &c
) < 0)
1640 err
= nlmsg_unicast(net
->xfrm
.nlsk
, r_skb
, NETLINK_CB(skb
).pid
);
1641 spin_unlock_bh(&x
->lock
);
1646 static int xfrm_new_ae(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1647 struct nlattr
**attrs
)
1649 struct net
*net
= sock_net(skb
->sk
);
1650 struct xfrm_state
*x
;
1655 struct xfrm_aevent_id
*p
= nlmsg_data(nlh
);
1656 struct nlattr
*rp
= attrs
[XFRMA_REPLAY_VAL
];
1657 struct nlattr
*lt
= attrs
[XFRMA_LTIME_VAL
];
1662 /* pedantic mode - thou shalt sayeth replaceth */
1663 if (!(nlh
->nlmsg_flags
&NLM_F_REPLACE
))
1666 mark
= xfrm_mark_get(attrs
, &m
);
1668 x
= xfrm_state_lookup(net
, mark
, &p
->sa_id
.daddr
, p
->sa_id
.spi
, p
->sa_id
.proto
, p
->sa_id
.family
);
1672 if (x
->km
.state
!= XFRM_STATE_VALID
)
1675 spin_lock_bh(&x
->lock
);
1676 xfrm_update_ae_params(x
, attrs
);
1677 spin_unlock_bh(&x
->lock
);
1679 c
.event
= nlh
->nlmsg_type
;
1680 c
.seq
= nlh
->nlmsg_seq
;
1681 c
.pid
= nlh
->nlmsg_pid
;
1682 c
.data
.aevent
= XFRM_AE_CU
;
1683 km_state_notify(x
, &c
);
1690 static int xfrm_flush_policy(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1691 struct nlattr
**attrs
)
1693 struct net
*net
= sock_net(skb
->sk
);
1695 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1697 struct xfrm_audit audit_info
;
1699 err
= copy_from_user_policy_type(&type
, attrs
);
1703 audit_info
.loginuid
= NETLINK_CB(skb
).loginuid
;
1704 audit_info
.sessionid
= NETLINK_CB(skb
).sessionid
;
1705 audit_info
.secid
= NETLINK_CB(skb
).sid
;
1706 err
= xfrm_policy_flush(net
, type
, &audit_info
);
1708 if (err
== -ESRCH
) /* empty table */
1714 c
.event
= nlh
->nlmsg_type
;
1715 c
.seq
= nlh
->nlmsg_seq
;
1716 c
.pid
= nlh
->nlmsg_pid
;
1718 km_policy_notify(NULL
, 0, &c
);
1722 static int xfrm_add_pol_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1723 struct nlattr
**attrs
)
1725 struct net
*net
= sock_net(skb
->sk
);
1726 struct xfrm_policy
*xp
;
1727 struct xfrm_user_polexpire
*up
= nlmsg_data(nlh
);
1728 struct xfrm_userpolicy_info
*p
= &up
->pol
;
1729 u8 type
= XFRM_POLICY_TYPE_MAIN
;
1732 u32 mark
= xfrm_mark_get(attrs
, &m
);
1734 err
= copy_from_user_policy_type(&type
, attrs
);
1738 err
= verify_policy_dir(p
->dir
);
1743 xp
= xfrm_policy_byid(net
, mark
, type
, p
->dir
, p
->index
, 0, &err
);
1745 struct nlattr
*rt
= attrs
[XFRMA_SEC_CTX
];
1746 struct xfrm_sec_ctx
*ctx
;
1748 err
= verify_sec_ctx_len(attrs
);
1754 struct xfrm_user_sec_ctx
*uctx
= nla_data(rt
);
1756 err
= security_xfrm_policy_alloc(&ctx
, uctx
);
1760 xp
= xfrm_policy_bysel_ctx(net
, mark
, type
, p
->dir
,
1761 &p
->sel
, ctx
, 0, &err
);
1762 security_xfrm_policy_free(ctx
);
1767 if (unlikely(xp
->walk
.dead
))
1772 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1773 uid_t sessionid
= NETLINK_CB(skb
).sessionid
;
1774 u32 sid
= NETLINK_CB(skb
).sid
;
1775 xfrm_policy_delete(xp
, p
->dir
);
1776 xfrm_audit_policy_delete(xp
, 1, loginuid
, sessionid
, sid
);
1779 // reset the timers here?
1780 WARN(1, "Dont know what to do with soft policy expire\n");
1782 km_policy_expired(xp
, p
->dir
, up
->hard
, current
->pid
);
1789 static int xfrm_add_sa_expire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1790 struct nlattr
**attrs
)
1792 struct net
*net
= sock_net(skb
->sk
);
1793 struct xfrm_state
*x
;
1795 struct xfrm_user_expire
*ue
= nlmsg_data(nlh
);
1796 struct xfrm_usersa_info
*p
= &ue
->state
;
1798 u32 mark
= xfrm_mark_get(attrs
, &m
);
1800 x
= xfrm_state_lookup(net
, mark
, &p
->id
.daddr
, p
->id
.spi
, p
->id
.proto
, p
->family
);
1806 spin_lock_bh(&x
->lock
);
1808 if (x
->km
.state
!= XFRM_STATE_VALID
)
1810 km_state_expired(x
, ue
->hard
, current
->pid
);
1813 uid_t loginuid
= NETLINK_CB(skb
).loginuid
;
1814 uid_t sessionid
= NETLINK_CB(skb
).sessionid
;
1815 u32 sid
= NETLINK_CB(skb
).sid
;
1816 __xfrm_state_delete(x
);
1817 xfrm_audit_state_delete(x
, 1, loginuid
, sessionid
, sid
);
1821 spin_unlock_bh(&x
->lock
);
1826 static int xfrm_add_acquire(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1827 struct nlattr
**attrs
)
1829 struct net
*net
= sock_net(skb
->sk
);
1830 struct xfrm_policy
*xp
;
1831 struct xfrm_user_tmpl
*ut
;
1833 struct nlattr
*rt
= attrs
[XFRMA_TMPL
];
1834 struct xfrm_mark mark
;
1836 struct xfrm_user_acquire
*ua
= nlmsg_data(nlh
);
1837 struct xfrm_state
*x
= xfrm_state_alloc(net
);
1843 xfrm_mark_get(attrs
, &mark
);
1845 err
= verify_newpolicy_info(&ua
->policy
);
1850 xp
= xfrm_policy_construct(net
, &ua
->policy
, attrs
, &err
);
1854 memcpy(&x
->id
, &ua
->id
, sizeof(ua
->id
));
1855 memcpy(&x
->props
.saddr
, &ua
->saddr
, sizeof(ua
->saddr
));
1856 memcpy(&x
->sel
, &ua
->sel
, sizeof(ua
->sel
));
1857 xp
->mark
.m
= x
->mark
.m
= mark
.m
;
1858 xp
->mark
.v
= x
->mark
.v
= mark
.v
;
1860 /* extract the templates and for each call km_key */
1861 for (i
= 0; i
< xp
->xfrm_nr
; i
++, ut
++) {
1862 struct xfrm_tmpl
*t
= &xp
->xfrm_vec
[i
];
1863 memcpy(&x
->id
, &t
->id
, sizeof(x
->id
));
1864 x
->props
.mode
= t
->mode
;
1865 x
->props
.reqid
= t
->reqid
;
1866 x
->props
.family
= ut
->family
;
1867 t
->aalgos
= ua
->aalgos
;
1868 t
->ealgos
= ua
->ealgos
;
1869 t
->calgos
= ua
->calgos
;
1870 err
= km_query(x
, t
, xp
);
1880 WARN(1, "BAD policy passed\n");
1887 #ifdef CONFIG_XFRM_MIGRATE
1888 static int copy_from_user_migrate(struct xfrm_migrate
*ma
,
1889 struct xfrm_kmaddress
*k
,
1890 struct nlattr
**attrs
, int *num
)
1892 struct nlattr
*rt
= attrs
[XFRMA_MIGRATE
];
1893 struct xfrm_user_migrate
*um
;
1897 struct xfrm_user_kmaddress
*uk
;
1899 uk
= nla_data(attrs
[XFRMA_KMADDRESS
]);
1900 memcpy(&k
->local
, &uk
->local
, sizeof(k
->local
));
1901 memcpy(&k
->remote
, &uk
->remote
, sizeof(k
->remote
));
1902 k
->family
= uk
->family
;
1903 k
->reserved
= uk
->reserved
;
1907 num_migrate
= nla_len(rt
) / sizeof(*um
);
1909 if (num_migrate
<= 0 || num_migrate
> XFRM_MAX_DEPTH
)
1912 for (i
= 0; i
< num_migrate
; i
++, um
++, ma
++) {
1913 memcpy(&ma
->old_daddr
, &um
->old_daddr
, sizeof(ma
->old_daddr
));
1914 memcpy(&ma
->old_saddr
, &um
->old_saddr
, sizeof(ma
->old_saddr
));
1915 memcpy(&ma
->new_daddr
, &um
->new_daddr
, sizeof(ma
->new_daddr
));
1916 memcpy(&ma
->new_saddr
, &um
->new_saddr
, sizeof(ma
->new_saddr
));
1918 ma
->proto
= um
->proto
;
1919 ma
->mode
= um
->mode
;
1920 ma
->reqid
= um
->reqid
;
1922 ma
->old_family
= um
->old_family
;
1923 ma
->new_family
= um
->new_family
;
1930 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1931 struct nlattr
**attrs
)
1933 struct xfrm_userpolicy_id
*pi
= nlmsg_data(nlh
);
1934 struct xfrm_migrate m
[XFRM_MAX_DEPTH
];
1935 struct xfrm_kmaddress km
, *kmp
;
1940 if (attrs
[XFRMA_MIGRATE
] == NULL
)
1943 kmp
= attrs
[XFRMA_KMADDRESS
] ? &km
: NULL
;
1945 err
= copy_from_user_policy_type(&type
, attrs
);
1949 err
= copy_from_user_migrate((struct xfrm_migrate
*)m
, kmp
, attrs
, &n
);
1956 xfrm_migrate(&pi
->sel
, pi
->dir
, type
, m
, n
, kmp
);
1961 static int xfrm_do_migrate(struct sk_buff
*skb
, struct nlmsghdr
*nlh
,
1962 struct nlattr
**attrs
)
1964 return -ENOPROTOOPT
;
1968 #ifdef CONFIG_XFRM_MIGRATE
1969 static int copy_to_user_migrate(struct xfrm_migrate
*m
, struct sk_buff
*skb
)
1971 struct xfrm_user_migrate um
;
1973 memset(&um
, 0, sizeof(um
));
1974 um
.proto
= m
->proto
;
1976 um
.reqid
= m
->reqid
;
1977 um
.old_family
= m
->old_family
;
1978 memcpy(&um
.old_daddr
, &m
->old_daddr
, sizeof(um
.old_daddr
));
1979 memcpy(&um
.old_saddr
, &m
->old_saddr
, sizeof(um
.old_saddr
));
1980 um
.new_family
= m
->new_family
;
1981 memcpy(&um
.new_daddr
, &m
->new_daddr
, sizeof(um
.new_daddr
));
1982 memcpy(&um
.new_saddr
, &m
->new_saddr
, sizeof(um
.new_saddr
));
1984 return nla_put(skb
, XFRMA_MIGRATE
, sizeof(um
), &um
);
1987 static int copy_to_user_kmaddress(struct xfrm_kmaddress
*k
, struct sk_buff
*skb
)
1989 struct xfrm_user_kmaddress uk
;
1991 memset(&uk
, 0, sizeof(uk
));
1992 uk
.family
= k
->family
;
1993 uk
.reserved
= k
->reserved
;
1994 memcpy(&uk
.local
, &k
->local
, sizeof(uk
.local
));
1995 memcpy(&uk
.remote
, &k
->remote
, sizeof(uk
.remote
));
1997 return nla_put(skb
, XFRMA_KMADDRESS
, sizeof(uk
), &uk
);
2000 static inline size_t xfrm_migrate_msgsize(int num_migrate
, int with_kma
)
2002 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id
))
2003 + (with_kma
? nla_total_size(sizeof(struct xfrm_kmaddress
)) : 0)
2004 + nla_total_size(sizeof(struct xfrm_user_migrate
) * num_migrate
)
2005 + userpolicy_type_attrsize();
2008 static int build_migrate(struct sk_buff
*skb
, struct xfrm_migrate
*m
,
2009 int num_migrate
, struct xfrm_kmaddress
*k
,
2010 struct xfrm_selector
*sel
, u8 dir
, u8 type
)
2012 struct xfrm_migrate
*mp
;
2013 struct xfrm_userpolicy_id
*pol_id
;
2014 struct nlmsghdr
*nlh
;
2017 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MIGRATE
, sizeof(*pol_id
), 0);
2021 pol_id
= nlmsg_data(nlh
);
2022 /* copy data from selector, dir, and type to the pol_id */
2023 memset(pol_id
, 0, sizeof(*pol_id
));
2024 memcpy(&pol_id
->sel
, sel
, sizeof(pol_id
->sel
));
2027 if (k
!= NULL
&& (copy_to_user_kmaddress(k
, skb
) < 0))
2030 if (copy_to_user_policy_type(type
, skb
) < 0)
2033 for (i
= 0, mp
= m
; i
< num_migrate
; i
++, mp
++) {
2034 if (copy_to_user_migrate(mp
, skb
) < 0)
2038 return nlmsg_end(skb
, nlh
);
2040 nlmsg_cancel(skb
, nlh
);
2044 static int xfrm_send_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
2045 struct xfrm_migrate
*m
, int num_migrate
,
2046 struct xfrm_kmaddress
*k
)
2048 struct net
*net
= &init_net
;
2049 struct sk_buff
*skb
;
2051 skb
= nlmsg_new(xfrm_migrate_msgsize(num_migrate
, !!k
), GFP_ATOMIC
);
2056 if (build_migrate(skb
, m
, num_migrate
, k
, sel
, dir
, type
) < 0)
2059 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MIGRATE
, GFP_ATOMIC
);
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 return -ENOPROTOOPT
;
2070 #define XMSGSIZE(type) sizeof(struct type)
2072 static const int xfrm_msg_min
[XFRM_NR_MSGTYPES
] = {
2073 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2074 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2075 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_id
),
2076 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2077 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2078 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2079 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userspi_info
),
2080 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_acquire
),
2081 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_expire
),
2082 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_info
),
2083 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_info
),
2084 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_polexpire
),
2085 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_usersa_flush
),
2086 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = 0,
2087 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2088 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_aevent_id
),
2089 [XFRM_MSG_REPORT
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_user_report
),
2090 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = XMSGSIZE(xfrm_userpolicy_id
),
2091 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2092 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = sizeof(u32
),
2097 static const struct nla_policy xfrma_policy
[XFRMA_MAX
+1] = {
2098 [XFRMA_SA
] = { .len
= sizeof(struct xfrm_usersa_info
)},
2099 [XFRMA_POLICY
] = { .len
= sizeof(struct xfrm_userpolicy_info
)},
2100 [XFRMA_LASTUSED
] = { .type
= NLA_U64
},
2101 [XFRMA_ALG_AUTH_TRUNC
] = { .len
= sizeof(struct xfrm_algo_auth
)},
2102 [XFRMA_ALG_AEAD
] = { .len
= sizeof(struct xfrm_algo_aead
) },
2103 [XFRMA_ALG_AUTH
] = { .len
= sizeof(struct xfrm_algo
) },
2104 [XFRMA_ALG_CRYPT
] = { .len
= sizeof(struct xfrm_algo
) },
2105 [XFRMA_ALG_COMP
] = { .len
= sizeof(struct xfrm_algo
) },
2106 [XFRMA_ENCAP
] = { .len
= sizeof(struct xfrm_encap_tmpl
) },
2107 [XFRMA_TMPL
] = { .len
= sizeof(struct xfrm_user_tmpl
) },
2108 [XFRMA_SEC_CTX
] = { .len
= sizeof(struct xfrm_sec_ctx
) },
2109 [XFRMA_LTIME_VAL
] = { .len
= sizeof(struct xfrm_lifetime_cur
) },
2110 [XFRMA_REPLAY_VAL
] = { .len
= sizeof(struct xfrm_replay_state
) },
2111 [XFRMA_REPLAY_THRESH
] = { .type
= NLA_U32
},
2112 [XFRMA_ETIMER_THRESH
] = { .type
= NLA_U32
},
2113 [XFRMA_SRCADDR
] = { .len
= sizeof(xfrm_address_t
) },
2114 [XFRMA_COADDR
] = { .len
= sizeof(xfrm_address_t
) },
2115 [XFRMA_POLICY_TYPE
] = { .len
= sizeof(struct xfrm_userpolicy_type
)},
2116 [XFRMA_MIGRATE
] = { .len
= sizeof(struct xfrm_user_migrate
) },
2117 [XFRMA_KMADDRESS
] = { .len
= sizeof(struct xfrm_user_kmaddress
) },
2118 [XFRMA_MARK
] = { .len
= sizeof(struct xfrm_mark
) },
2121 static struct xfrm_link
{
2122 int (*doit
)(struct sk_buff
*, struct nlmsghdr
*, struct nlattr
**);
2123 int (*dump
)(struct sk_buff
*, struct netlink_callback
*);
2124 int (*done
)(struct netlink_callback
*);
2125 } xfrm_dispatch
[XFRM_NR_MSGTYPES
] = {
2126 [XFRM_MSG_NEWSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2127 [XFRM_MSG_DELSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_del_sa
},
2128 [XFRM_MSG_GETSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sa
,
2129 .dump
= xfrm_dump_sa
,
2130 .done
= xfrm_dump_sa_done
},
2131 [XFRM_MSG_NEWPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2132 [XFRM_MSG_DELPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
},
2133 [XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_policy
,
2134 .dump
= xfrm_dump_policy
,
2135 .done
= xfrm_dump_policy_done
},
2136 [XFRM_MSG_ALLOCSPI
- XFRM_MSG_BASE
] = { .doit
= xfrm_alloc_userspi
},
2137 [XFRM_MSG_ACQUIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_acquire
},
2138 [XFRM_MSG_EXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa_expire
},
2139 [XFRM_MSG_UPDPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_policy
},
2140 [XFRM_MSG_UPDSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_sa
},
2141 [XFRM_MSG_POLEXPIRE
- XFRM_MSG_BASE
] = { .doit
= xfrm_add_pol_expire
},
2142 [XFRM_MSG_FLUSHSA
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_sa
},
2143 [XFRM_MSG_FLUSHPOLICY
- XFRM_MSG_BASE
] = { .doit
= xfrm_flush_policy
},
2144 [XFRM_MSG_NEWAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_new_ae
},
2145 [XFRM_MSG_GETAE
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_ae
},
2146 [XFRM_MSG_MIGRATE
- XFRM_MSG_BASE
] = { .doit
= xfrm_do_migrate
},
2147 [XFRM_MSG_GETSADINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_sadinfo
},
2148 [XFRM_MSG_GETSPDINFO
- XFRM_MSG_BASE
] = { .doit
= xfrm_get_spdinfo
},
2151 static int xfrm_user_rcv_msg(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
2153 struct net
*net
= sock_net(skb
->sk
);
2154 struct nlattr
*attrs
[XFRMA_MAX
+1];
2155 struct xfrm_link
*link
;
2158 type
= nlh
->nlmsg_type
;
2159 if (type
> XFRM_MSG_MAX
)
2162 type
-= XFRM_MSG_BASE
;
2163 link
= &xfrm_dispatch
[type
];
2165 /* All operations require privileges, even GET */
2166 if (security_netlink_recv(skb
, CAP_NET_ADMIN
))
2169 if ((type
== (XFRM_MSG_GETSA
- XFRM_MSG_BASE
) ||
2170 type
== (XFRM_MSG_GETPOLICY
- XFRM_MSG_BASE
)) &&
2171 (nlh
->nlmsg_flags
& NLM_F_DUMP
)) {
2172 if (link
->dump
== NULL
)
2175 return netlink_dump_start(net
->xfrm
.nlsk
, skb
, nlh
, link
->dump
, link
->done
);
2178 err
= nlmsg_parse(nlh
, xfrm_msg_min
[type
], attrs
, XFRMA_MAX
,
2183 if (link
->doit
== NULL
)
2186 return link
->doit(skb
, nlh
, attrs
);
2189 static void xfrm_netlink_rcv(struct sk_buff
*skb
)
2191 mutex_lock(&xfrm_cfg_mutex
);
2192 netlink_rcv_skb(skb
, &xfrm_user_rcv_msg
);
2193 mutex_unlock(&xfrm_cfg_mutex
);
2196 static inline size_t xfrm_expire_msgsize(void)
2198 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire
))
2199 + nla_total_size(sizeof(struct xfrm_mark
));
2202 static int build_expire(struct sk_buff
*skb
, struct xfrm_state
*x
, struct km_event
*c
)
2204 struct xfrm_user_expire
*ue
;
2205 struct nlmsghdr
*nlh
;
2207 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_EXPIRE
, sizeof(*ue
), 0);
2211 ue
= nlmsg_data(nlh
);
2212 copy_to_user_state(x
, &ue
->state
);
2213 ue
->hard
= (c
->data
.hard
!= 0) ? 1 : 0;
2215 if (xfrm_mark_put(skb
, &x
->mark
))
2216 goto nla_put_failure
;
2218 return nlmsg_end(skb
, nlh
);
2224 static int xfrm_exp_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2226 struct net
*net
= xs_net(x
);
2227 struct sk_buff
*skb
;
2229 skb
= nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC
);
2233 if (build_expire(skb
, x
, c
) < 0) {
2238 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2241 static int xfrm_aevent_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2243 struct net
*net
= xs_net(x
);
2244 struct sk_buff
*skb
;
2246 skb
= nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC
);
2250 if (build_aevent(skb
, x
, c
) < 0)
2253 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_AEVENTS
, GFP_ATOMIC
);
2256 static int xfrm_notify_sa_flush(struct km_event
*c
)
2258 struct net
*net
= c
->net
;
2259 struct xfrm_usersa_flush
*p
;
2260 struct nlmsghdr
*nlh
;
2261 struct sk_buff
*skb
;
2262 int len
= NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush
));
2264 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2268 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHSA
, sizeof(*p
), 0);
2274 p
= nlmsg_data(nlh
);
2275 p
->proto
= c
->data
.proto
;
2277 nlmsg_end(skb
, nlh
);
2279 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2282 static inline size_t xfrm_sa_len(struct xfrm_state
*x
)
2286 l
+= nla_total_size(aead_len(x
->aead
));
2288 l
+= nla_total_size(sizeof(struct xfrm_algo
) +
2289 (x
->aalg
->alg_key_len
+ 7) / 8);
2290 l
+= nla_total_size(xfrm_alg_auth_len(x
->aalg
));
2293 l
+= nla_total_size(xfrm_alg_len(x
->ealg
));
2295 l
+= nla_total_size(sizeof(*x
->calg
));
2297 l
+= nla_total_size(sizeof(*x
->encap
));
2299 l
+= nla_total_size(sizeof(struct xfrm_user_sec_ctx
) +
2300 x
->security
->ctx_len
);
2302 l
+= nla_total_size(sizeof(*x
->coaddr
));
2304 /* Must count x->lastused as it may become non-zero behind our back. */
2305 l
+= nla_total_size(sizeof(u64
));
2310 static int xfrm_notify_sa(struct xfrm_state
*x
, struct km_event
*c
)
2312 struct net
*net
= xs_net(x
);
2313 struct xfrm_usersa_info
*p
;
2314 struct xfrm_usersa_id
*id
;
2315 struct nlmsghdr
*nlh
;
2316 struct sk_buff
*skb
;
2317 int len
= xfrm_sa_len(x
);
2320 headlen
= sizeof(*p
);
2321 if (c
->event
== XFRM_MSG_DELSA
) {
2322 len
+= nla_total_size(headlen
);
2323 headlen
= sizeof(*id
);
2324 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2326 len
+= NLMSG_ALIGN(headlen
);
2328 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2332 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2334 goto nla_put_failure
;
2336 p
= nlmsg_data(nlh
);
2337 if (c
->event
== XFRM_MSG_DELSA
) {
2338 struct nlattr
*attr
;
2340 id
= nlmsg_data(nlh
);
2341 memcpy(&id
->daddr
, &x
->id
.daddr
, sizeof(id
->daddr
));
2342 id
->spi
= x
->id
.spi
;
2343 id
->family
= x
->props
.family
;
2344 id
->proto
= x
->id
.proto
;
2346 attr
= nla_reserve(skb
, XFRMA_SA
, sizeof(*p
));
2348 goto nla_put_failure
;
2353 if (copy_to_user_state_extra(x
, p
, skb
))
2354 goto nla_put_failure
;
2356 nlmsg_end(skb
, nlh
);
2358 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_SA
, GFP_ATOMIC
);
2361 /* Somebody screwed up with xfrm_sa_len! */
2367 static int xfrm_send_state_notify(struct xfrm_state
*x
, struct km_event
*c
)
2371 case XFRM_MSG_EXPIRE
:
2372 return xfrm_exp_state_notify(x
, c
);
2373 case XFRM_MSG_NEWAE
:
2374 return xfrm_aevent_state_notify(x
, c
);
2375 case XFRM_MSG_DELSA
:
2376 case XFRM_MSG_UPDSA
:
2377 case XFRM_MSG_NEWSA
:
2378 return xfrm_notify_sa(x
, c
);
2379 case XFRM_MSG_FLUSHSA
:
2380 return xfrm_notify_sa_flush(c
);
2382 printk(KERN_NOTICE
"xfrm_user: Unknown SA event %d\n",
2391 static inline size_t xfrm_acquire_msgsize(struct xfrm_state
*x
,
2392 struct xfrm_policy
*xp
)
2394 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire
))
2395 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2396 + nla_total_size(sizeof(struct xfrm_mark
))
2397 + nla_total_size(xfrm_user_sec_ctx_size(x
->security
))
2398 + userpolicy_type_attrsize();
2401 static int build_acquire(struct sk_buff
*skb
, struct xfrm_state
*x
,
2402 struct xfrm_tmpl
*xt
, struct xfrm_policy
*xp
,
2405 struct xfrm_user_acquire
*ua
;
2406 struct nlmsghdr
*nlh
;
2407 __u32 seq
= xfrm_get_acqseq();
2409 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_ACQUIRE
, sizeof(*ua
), 0);
2413 ua
= nlmsg_data(nlh
);
2414 memcpy(&ua
->id
, &x
->id
, sizeof(ua
->id
));
2415 memcpy(&ua
->saddr
, &x
->props
.saddr
, sizeof(ua
->saddr
));
2416 memcpy(&ua
->sel
, &x
->sel
, sizeof(ua
->sel
));
2417 copy_to_user_policy(xp
, &ua
->policy
, dir
);
2418 ua
->aalgos
= xt
->aalgos
;
2419 ua
->ealgos
= xt
->ealgos
;
2420 ua
->calgos
= xt
->calgos
;
2421 ua
->seq
= x
->km
.seq
= seq
;
2423 if (copy_to_user_tmpl(xp
, skb
) < 0)
2425 if (copy_to_user_state_sec_ctx(x
, skb
))
2427 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2429 if (xfrm_mark_put(skb
, &xp
->mark
))
2430 goto nla_put_failure
;
2432 return nlmsg_end(skb
, nlh
);
2436 nlmsg_cancel(skb
, nlh
);
2440 static int xfrm_send_acquire(struct xfrm_state
*x
, struct xfrm_tmpl
*xt
,
2441 struct xfrm_policy
*xp
, int dir
)
2443 struct net
*net
= xs_net(x
);
2444 struct sk_buff
*skb
;
2446 skb
= nlmsg_new(xfrm_acquire_msgsize(x
, xp
), GFP_ATOMIC
);
2450 if (build_acquire(skb
, x
, xt
, xp
, dir
) < 0)
2453 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_ACQUIRE
, GFP_ATOMIC
);
2456 /* User gives us xfrm_user_policy_info followed by an array of 0
2457 * or more templates.
2459 static struct xfrm_policy
*xfrm_compile_policy(struct sock
*sk
, int opt
,
2460 u8
*data
, int len
, int *dir
)
2462 struct net
*net
= sock_net(sk
);
2463 struct xfrm_userpolicy_info
*p
= (struct xfrm_userpolicy_info
*)data
;
2464 struct xfrm_user_tmpl
*ut
= (struct xfrm_user_tmpl
*) (p
+ 1);
2465 struct xfrm_policy
*xp
;
2468 switch (sk
->sk_family
) {
2470 if (opt
!= IP_XFRM_POLICY
) {
2475 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2477 if (opt
!= IPV6_XFRM_POLICY
) {
2490 if (len
< sizeof(*p
) ||
2491 verify_newpolicy_info(p
))
2494 nr
= ((len
- sizeof(*p
)) / sizeof(*ut
));
2495 if (validate_tmpl(nr
, ut
, p
->sel
.family
))
2498 if (p
->dir
> XFRM_POLICY_OUT
)
2501 xp
= xfrm_policy_alloc(net
, GFP_ATOMIC
);
2507 copy_from_user_policy(xp
, p
);
2508 xp
->type
= XFRM_POLICY_TYPE_MAIN
;
2509 copy_templates(xp
, ut
, nr
);
2516 static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy
*xp
)
2518 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire
))
2519 + nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
)
2520 + nla_total_size(xfrm_user_sec_ctx_size(xp
->security
))
2521 + nla_total_size(sizeof(struct xfrm_mark
))
2522 + userpolicy_type_attrsize();
2525 static int build_polexpire(struct sk_buff
*skb
, struct xfrm_policy
*xp
,
2526 int dir
, struct km_event
*c
)
2528 struct xfrm_user_polexpire
*upe
;
2529 struct nlmsghdr
*nlh
;
2530 int hard
= c
->data
.hard
;
2532 nlh
= nlmsg_put(skb
, c
->pid
, 0, XFRM_MSG_POLEXPIRE
, sizeof(*upe
), 0);
2536 upe
= nlmsg_data(nlh
);
2537 copy_to_user_policy(xp
, &upe
->pol
, dir
);
2538 if (copy_to_user_tmpl(xp
, skb
) < 0)
2540 if (copy_to_user_sec_ctx(xp
, skb
))
2542 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2544 if (xfrm_mark_put(skb
, &xp
->mark
))
2545 goto nla_put_failure
;
2548 return nlmsg_end(skb
, nlh
);
2552 nlmsg_cancel(skb
, nlh
);
2556 static int xfrm_exp_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2558 struct net
*net
= xp_net(xp
);
2559 struct sk_buff
*skb
;
2561 skb
= nlmsg_new(xfrm_polexpire_msgsize(xp
), GFP_ATOMIC
);
2565 if (build_polexpire(skb
, xp
, dir
, c
) < 0)
2568 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_EXPIRE
, GFP_ATOMIC
);
2571 static int xfrm_notify_policy(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2573 struct net
*net
= xp_net(xp
);
2574 struct xfrm_userpolicy_info
*p
;
2575 struct xfrm_userpolicy_id
*id
;
2576 struct nlmsghdr
*nlh
;
2577 struct sk_buff
*skb
;
2578 int len
= nla_total_size(sizeof(struct xfrm_user_tmpl
) * xp
->xfrm_nr
);
2581 headlen
= sizeof(*p
);
2582 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2583 len
+= nla_total_size(headlen
);
2584 headlen
= sizeof(*id
);
2586 len
+= userpolicy_type_attrsize();
2587 len
+= nla_total_size(sizeof(struct xfrm_mark
));
2588 len
+= NLMSG_ALIGN(headlen
);
2590 skb
= nlmsg_new(len
, GFP_ATOMIC
);
2594 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, c
->event
, headlen
, 0);
2598 p
= nlmsg_data(nlh
);
2599 if (c
->event
== XFRM_MSG_DELPOLICY
) {
2600 struct nlattr
*attr
;
2602 id
= nlmsg_data(nlh
);
2603 memset(id
, 0, sizeof(*id
));
2606 id
->index
= xp
->index
;
2608 memcpy(&id
->sel
, &xp
->selector
, sizeof(id
->sel
));
2610 attr
= nla_reserve(skb
, XFRMA_POLICY
, sizeof(*p
));
2617 copy_to_user_policy(xp
, p
, dir
);
2618 if (copy_to_user_tmpl(xp
, skb
) < 0)
2620 if (copy_to_user_policy_type(xp
->type
, skb
) < 0)
2623 if (xfrm_mark_put(skb
, &xp
->mark
))
2624 goto nla_put_failure
;
2626 nlmsg_end(skb
, nlh
);
2628 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2636 static int xfrm_notify_policy_flush(struct km_event
*c
)
2638 struct net
*net
= c
->net
;
2639 struct nlmsghdr
*nlh
;
2640 struct sk_buff
*skb
;
2642 skb
= nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC
);
2646 nlh
= nlmsg_put(skb
, c
->pid
, c
->seq
, XFRM_MSG_FLUSHPOLICY
, 0, 0);
2649 if (copy_to_user_policy_type(c
->data
.type
, skb
) < 0)
2652 nlmsg_end(skb
, nlh
);
2654 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_POLICY
, GFP_ATOMIC
);
2661 static int xfrm_send_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
)
2665 case XFRM_MSG_NEWPOLICY
:
2666 case XFRM_MSG_UPDPOLICY
:
2667 case XFRM_MSG_DELPOLICY
:
2668 return xfrm_notify_policy(xp
, dir
, c
);
2669 case XFRM_MSG_FLUSHPOLICY
:
2670 return xfrm_notify_policy_flush(c
);
2671 case XFRM_MSG_POLEXPIRE
:
2672 return xfrm_exp_policy_notify(xp
, dir
, c
);
2674 printk(KERN_NOTICE
"xfrm_user: Unknown Policy event %d\n",
2682 static inline size_t xfrm_report_msgsize(void)
2684 return NLMSG_ALIGN(sizeof(struct xfrm_user_report
));
2687 static int build_report(struct sk_buff
*skb
, u8 proto
,
2688 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2690 struct xfrm_user_report
*ur
;
2691 struct nlmsghdr
*nlh
;
2693 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_REPORT
, sizeof(*ur
), 0);
2697 ur
= nlmsg_data(nlh
);
2699 memcpy(&ur
->sel
, sel
, sizeof(ur
->sel
));
2702 NLA_PUT(skb
, XFRMA_COADDR
, sizeof(*addr
), addr
);
2704 return nlmsg_end(skb
, nlh
);
2707 nlmsg_cancel(skb
, nlh
);
2711 static int xfrm_send_report(struct net
*net
, u8 proto
,
2712 struct xfrm_selector
*sel
, xfrm_address_t
*addr
)
2714 struct sk_buff
*skb
;
2716 skb
= nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC
);
2720 if (build_report(skb
, proto
, sel
, addr
) < 0)
2723 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_REPORT
, GFP_ATOMIC
);
2726 static inline size_t xfrm_mapping_msgsize(void)
2728 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping
));
2731 static int build_mapping(struct sk_buff
*skb
, struct xfrm_state
*x
,
2732 xfrm_address_t
*new_saddr
, __be16 new_sport
)
2734 struct xfrm_user_mapping
*um
;
2735 struct nlmsghdr
*nlh
;
2737 nlh
= nlmsg_put(skb
, 0, 0, XFRM_MSG_MAPPING
, sizeof(*um
), 0);
2741 um
= nlmsg_data(nlh
);
2743 memcpy(&um
->id
.daddr
, &x
->id
.daddr
, sizeof(um
->id
.daddr
));
2744 um
->id
.spi
= x
->id
.spi
;
2745 um
->id
.family
= x
->props
.family
;
2746 um
->id
.proto
= x
->id
.proto
;
2747 memcpy(&um
->new_saddr
, new_saddr
, sizeof(um
->new_saddr
));
2748 memcpy(&um
->old_saddr
, &x
->props
.saddr
, sizeof(um
->old_saddr
));
2749 um
->new_sport
= new_sport
;
2750 um
->old_sport
= x
->encap
->encap_sport
;
2751 um
->reqid
= x
->props
.reqid
;
2753 return nlmsg_end(skb
, nlh
);
2756 static int xfrm_send_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
,
2759 struct net
*net
= xs_net(x
);
2760 struct sk_buff
*skb
;
2762 if (x
->id
.proto
!= IPPROTO_ESP
)
2768 skb
= nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC
);
2772 if (build_mapping(skb
, x
, ipaddr
, sport
) < 0)
2775 return nlmsg_multicast(net
->xfrm
.nlsk
, skb
, 0, XFRMNLGRP_MAPPING
, GFP_ATOMIC
);
2778 static struct xfrm_mgr netlink_mgr
= {
2780 .notify
= xfrm_send_state_notify
,
2781 .acquire
= xfrm_send_acquire
,
2782 .compile_policy
= xfrm_compile_policy
,
2783 .notify_policy
= xfrm_send_policy_notify
,
2784 .report
= xfrm_send_report
,
2785 .migrate
= xfrm_send_migrate
,
2786 .new_mapping
= xfrm_send_mapping
,
2789 static int __net_init
xfrm_user_net_init(struct net
*net
)
2793 nlsk
= netlink_kernel_create(net
, NETLINK_XFRM
, XFRMNLGRP_MAX
,
2794 xfrm_netlink_rcv
, NULL
, THIS_MODULE
);
2797 net
->xfrm
.nlsk_stash
= nlsk
; /* Don't set to NULL */
2798 rcu_assign_pointer(net
->xfrm
.nlsk
, nlsk
);
2802 static void __net_exit
xfrm_user_net_exit(struct list_head
*net_exit_list
)
2805 list_for_each_entry(net
, net_exit_list
, exit_list
)
2806 rcu_assign_pointer(net
->xfrm
.nlsk
, NULL
);
2808 list_for_each_entry(net
, net_exit_list
, exit_list
)
2809 netlink_kernel_release(net
->xfrm
.nlsk_stash
);
2812 static struct pernet_operations xfrm_user_net_ops
= {
2813 .init
= xfrm_user_net_init
,
2814 .exit_batch
= xfrm_user_net_exit
,
2817 static int __init
xfrm_user_init(void)
2821 printk(KERN_INFO
"Initializing XFRM netlink socket\n");
2823 rv
= register_pernet_subsys(&xfrm_user_net_ops
);
2826 rv
= xfrm_register_km(&netlink_mgr
);
2828 unregister_pernet_subsys(&xfrm_user_net_ops
);
2832 static void __exit
xfrm_user_exit(void)
2834 xfrm_unregister_km(&netlink_mgr
);
2835 unregister_pernet_subsys(&xfrm_user_net_ops
);
2838 module_init(xfrm_user_init
);
2839 module_exit(xfrm_user_exit
);
2840 MODULE_LICENSE("GPL");
2841 MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK
, NETLINK_XFRM
);