4 #include <linux/compiler.h>
6 #include <linux/xfrm.h>
7 #include <linux/spinlock.h>
8 #include <linux/list.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/pfkeyv2.h>
12 #include <linux/ipsec.h>
13 #include <linux/in6.h>
14 #include <linux/mutex.h>
18 #include <net/route.h>
20 #include <net/ip6_fib.h>
22 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
23 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
24 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
26 extern struct sock
*xfrm_nl
;
27 extern u32 sysctl_xfrm_aevent_etime
;
28 extern u32 sysctl_xfrm_aevent_rseqth
;
30 extern struct mutex xfrm_cfg_mutex
;
32 /* Organization of SPD aka "XFRM rules"
33 ------------------------------------
36 - policy rule, struct xfrm_policy (=SPD entry)
37 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
38 - instance of a transformer, struct xfrm_state (=SA)
39 - template to clone xfrm_state, struct xfrm_tmpl
41 SPD is plain linear list of xfrm_policy rules, ordered by priority.
42 (To be compatible with existing pfkeyv2 implementations,
43 many rules with priority of 0x7fffffff are allowed to exist and
44 such rules are ordered in an unpredictable way, thanks to bsd folks.)
46 Lookup is plain linear search until the first match with selector.
48 If "action" is "block", then we prohibit the flow, otherwise:
49 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
50 policy entry has list of up to XFRM_MAX_DEPTH transformations,
51 described by templates xfrm_tmpl. Each template is resolved
52 to a complete xfrm_state (see below) and we pack bundle of transformations
53 to a dst_entry returned to requestor.
55 dst -. xfrm .-> xfrm_state #1
56 |---. child .-> dst -. xfrm .-> xfrm_state #2
57 |---. child .-> dst -. xfrm .-> xfrm_state #3
60 Bundles are cached at xrfm_policy struct (field ->bundles).
63 Resolution of xrfm_tmpl
64 -----------------------
66 1. ->mode Mode: transport or tunnel
67 2. ->id.proto Protocol: AH/ESP/IPCOMP
68 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
69 Q: allow to resolve security gateway?
70 4. ->id.spi If not zero, static SPI.
71 5. ->saddr Local tunnel endpoint, ignored for transport mode.
72 6. ->algos List of allowed algos. Plain bitmask now.
73 Q: ealgos, aalgos, calgos. What a mess...
74 7. ->share Sharing mode.
75 Q: how to implement private sharing mode? To add struct sock* to
78 Having this template we search through SAD searching for entries
79 with appropriate mode/proto/algo, permitted by selector.
80 If no appropriate entry found, it is requested from key manager.
83 Q: How to find all the bundles referring to a physical path for
84 PMTU discovery? Seems, dst should contain list of all parents...
85 and enter to infinite locking hierarchy disaster.
86 No! It is easier, we will not search for them, let them find us.
87 We add genid to each dst plus pointer to genid of raw IP route,
88 pmtu disc will update pmtu on raw IP route and increase its genid.
89 dst_check() will see this for top level and trigger resyncing
90 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
93 /* Full description of state of transformer. */
96 /* Note: bydst is re-used during gc */
97 struct hlist_node bydst
;
98 struct hlist_node bysrc
;
99 struct hlist_node byspi
;
105 struct xfrm_selector sel
;
109 /* Key manger bits */
116 /* Parameters of this state. */
121 u8 aalgo
, ealgo
, calgo
;
124 xfrm_address_t saddr
;
129 struct xfrm_lifetime_cfg lft
;
131 /* Data for transformer */
132 struct xfrm_algo
*aalg
;
133 struct xfrm_algo
*ealg
;
134 struct xfrm_algo
*calg
;
136 /* Data for encapsulator */
137 struct xfrm_encap_tmpl
*encap
;
139 /* Data for care-of address */
140 xfrm_address_t
*coaddr
;
142 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
143 struct xfrm_state
*tunnel
;
145 /* If a tunnel, number of users + 1 */
146 atomic_t tunnel_users
;
148 /* State for replay detection */
149 struct xfrm_replay_state replay
;
151 /* Replay detection state at the time we sent the last notification */
152 struct xfrm_replay_state preplay
;
154 /* internal flag that only holds state for delayed aevent at the
159 /* Replay detection notification settings */
163 /* Replay detection notification timer */
164 struct timer_list rtimer
;
167 struct xfrm_stats stats
;
169 struct xfrm_lifetime_cur curlft
;
170 struct timer_list timer
;
175 /* Reference to data common to all the instances of this
177 struct xfrm_type
*type
;
178 struct xfrm_mode
*mode
;
180 /* Security context */
181 struct xfrm_sec_ctx
*security
;
183 /* Private data of this transformer, format is opaque,
184 * interpreted by xfrm_type methods. */
188 /* xflags - make enum if more show up */
189 #define XFRM_TIME_DEFER 1
200 /* callback structure passed from either netlink or pfkey */
218 struct xfrm_policy_afinfo
{
219 unsigned short family
;
220 struct xfrm_type
*type_map
[IPPROTO_MAX
];
221 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
222 struct dst_ops
*dst_ops
;
223 void (*garbage_collect
)(void);
224 int (*dst_lookup
)(struct xfrm_dst
**dst
, struct flowi
*fl
);
225 int (*get_saddr
)(xfrm_address_t
*saddr
, xfrm_address_t
*daddr
);
226 struct dst_entry
*(*find_bundle
)(struct flowi
*fl
, struct xfrm_policy
*policy
);
227 int (*bundle_create
)(struct xfrm_policy
*policy
,
228 struct xfrm_state
**xfrm
,
231 struct dst_entry
**dst_p
);
232 void (*decode_session
)(struct sk_buff
*skb
,
236 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
237 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
238 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
239 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
242 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
243 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
244 extern int __xfrm_state_delete(struct xfrm_state
*x
);
246 struct xfrm_state_afinfo
{
247 unsigned short family
;
248 int (*init_flags
)(struct xfrm_state
*x
);
249 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
250 struct xfrm_tmpl
*tmpl
,
251 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
252 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
253 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
254 int (*output
)(struct sk_buff
*skb
);
257 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
258 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
259 extern struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned short family
);
260 extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo
*afinfo
);
262 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
267 struct module
*owner
;
270 #define XFRM_TYPE_NON_FRAGMENT 1
272 int (*init_state
)(struct xfrm_state
*x
);
273 void (*destructor
)(struct xfrm_state
*);
274 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
275 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
276 int (*reject
)(struct xfrm_state
*, struct sk_buff
*, struct flowi
*);
277 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
278 xfrm_address_t
*(*local_addr
)(struct xfrm_state
*, xfrm_address_t
*);
279 xfrm_address_t
*(*remote_addr
)(struct xfrm_state
*, xfrm_address_t
*);
280 /* Estimate maximal size of result of transformation of a dgram */
281 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
284 extern int xfrm_register_type(struct xfrm_type
*type
, unsigned short family
);
285 extern int xfrm_unregister_type(struct xfrm_type
*type
, unsigned short family
);
286 extern struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
);
287 extern void xfrm_put_type(struct xfrm_type
*type
);
290 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
291 int (*output
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
293 struct module
*owner
;
297 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
298 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
299 extern struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
);
300 extern void xfrm_put_mode(struct xfrm_mode
*mode
);
304 /* id in template is interpreted as:
305 * daddr - destination of tunnel, may be zero for transport mode.
306 * spi - zero to acquire spi. Not zero if spi is static, then
307 * daddr must be fixed too.
308 * proto - AH/ESP/IPCOMP
312 /* Source address of tunnel. Ignored, if it is not a tunnel. */
313 xfrm_address_t saddr
;
315 unsigned short encap_family
;
319 /* Mode: transport, tunnel etc. */
322 /* Sharing mode: unique, this session only, this user only etc. */
325 /* May skip this transfomration if no SA is found */
328 /* Bit mask of algos allowed for acquisition */
334 #define XFRM_MAX_DEPTH 6
338 struct xfrm_policy
*next
;
339 struct hlist_node bydst
;
340 struct hlist_node byidx
;
342 /* This lock only affects elements except for entry. */
345 struct timer_list timer
;
349 struct xfrm_selector selector
;
350 struct xfrm_lifetime_cfg lft
;
351 struct xfrm_lifetime_cur curlft
;
352 struct dst_entry
*bundles
;
359 /* XXX 1 byte hole, try to pack */
360 struct xfrm_sec_ctx
*security
;
361 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
364 struct xfrm_migrate
{
365 xfrm_address_t old_daddr
;
366 xfrm_address_t old_saddr
;
367 xfrm_address_t new_daddr
;
368 xfrm_address_t new_saddr
;
377 #define XFRM_KM_TIMEOUT 30
379 #define XFRM_REPLAY_SEQ 1
380 #define XFRM_REPLAY_OSEQ 2
381 #define XFRM_REPLAY_SEQ_MASK 3
383 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
384 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
386 /* default aevent timeout in units of 100ms */
387 #define XFRM_AE_ETIME 10
388 /* Async Event timer multiplier */
389 #define XFRM_AE_ETH_M 10
390 /* default seq threshold size */
391 #define XFRM_AE_SEQT_SIZE 2
395 struct list_head list
;
397 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
398 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
399 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
400 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
401 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
402 int (*report
)(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
403 int (*migrate
)(struct xfrm_selector
*sel
, u8 dir
, u8 type
, struct xfrm_migrate
*m
, int num_bundles
);
406 extern int xfrm_register_km(struct xfrm_mgr
*km
);
407 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
409 extern unsigned int xfrm_policy_count
[XFRM_POLICY_MAX
*2];
411 /* Audit Information */
418 #ifdef CONFIG_AUDITSYSCALL
419 extern void xfrm_audit_log(uid_t auid
, u32 secid
, int type
, int result
,
420 struct xfrm_policy
*xp
, struct xfrm_state
*x
);
422 #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0)
423 #endif /* CONFIG_AUDITSYSCALL */
425 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
427 if (likely(policy
!= NULL
))
428 atomic_inc(&policy
->refcnt
);
431 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
433 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
435 if (atomic_dec_and_test(&policy
->refcnt
))
436 __xfrm_policy_destroy(policy
);
439 #ifdef CONFIG_XFRM_SUB_POLICY
440 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
443 for (i
= npols
- 1; i
>= 0; --i
)
444 xfrm_pol_put(pols
[i
]);
447 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
449 xfrm_pol_put(pols
[0]);
453 extern void __xfrm_state_destroy(struct xfrm_state
*);
455 static inline void __xfrm_state_put(struct xfrm_state
*x
)
457 atomic_dec(&x
->refcnt
);
460 static inline void xfrm_state_put(struct xfrm_state
*x
)
462 if (atomic_dec_and_test(&x
->refcnt
))
463 __xfrm_state_destroy(x
);
466 static inline void xfrm_state_hold(struct xfrm_state
*x
)
468 atomic_inc(&x
->refcnt
);
471 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
478 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
479 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
482 if (memcmp(a1
, a2
, pdw
<< 2))
488 mask
= htonl((0xffffffff) << (32 - pbi
));
490 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
498 __be16
xfrm_flowi_sport(struct flowi
*fl
)
504 case IPPROTO_UDPLITE
:
506 port
= fl
->fl_ip_sport
;
510 port
= htons(fl
->fl_icmp_type
);
512 #ifdef CONFIG_IPV6_MIP6
514 port
= htons(fl
->fl_mh_type
);
524 __be16
xfrm_flowi_dport(struct flowi
*fl
)
530 case IPPROTO_UDPLITE
:
532 port
= fl
->fl_ip_dport
;
536 port
= htons(fl
->fl_icmp_code
);
544 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
545 unsigned short family
);
547 #ifdef CONFIG_SECURITY_NETWORK_XFRM
548 /* If neither has a context --> match
549 * Otherwise, both must have a context and the sids, doi, alg must match
551 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
553 return ((!s1
&& !s2
) ||
555 (s1
->ctx_sid
== s2
->ctx_sid
) &&
556 (s1
->ctx_doi
== s2
->ctx_doi
) &&
557 (s1
->ctx_alg
== s2
->ctx_alg
)));
560 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
566 /* A struct encoding bundle of transformations to apply to some set of flow.
568 * dst->child points to the next element of bundle.
569 * dst->xfrm points to an instanse of transformer.
571 * Due to unfortunate limitations of current routing cache, which we
572 * have no time to fix, it mirrors struct rtable and bound to the same
573 * routing key, including saddr,daddr. However, we can have many of
574 * bundles differing by session id. All the bundles grow from a parent
580 struct dst_entry dst
;
584 struct dst_entry
*route
;
585 #ifdef CONFIG_XFRM_SUB_POLICY
586 struct flowi
*origin
;
587 struct xfrm_selector
*partner
;
590 u32 route_mtu_cached
;
591 u32 child_mtu_cached
;
596 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
598 dst_release(xdst
->route
);
599 if (likely(xdst
->u
.dst
.xfrm
))
600 xfrm_state_put(xdst
->u
.dst
.xfrm
);
601 #ifdef CONFIG_XFRM_SUB_POLICY
604 kfree(xdst
->partner
);
605 xdst
->partner
= NULL
;
609 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
615 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
618 static inline struct sec_path
*
619 secpath_get(struct sec_path
*sp
)
622 atomic_inc(&sp
->refcnt
);
626 extern void __secpath_destroy(struct sec_path
*sp
);
629 secpath_put(struct sec_path
*sp
)
631 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
632 __secpath_destroy(sp
);
635 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
638 secpath_reset(struct sk_buff
*skb
)
641 secpath_put(skb
->sp
);
647 xfrm_addr_any(xfrm_address_t
*addr
, unsigned short family
)
651 return addr
->a4
== 0;
653 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
659 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
661 return (tmpl
->saddr
.a4
&&
662 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
666 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
668 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
669 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
673 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
677 return __xfrm4_state_addr_cmp(tmpl
, x
);
679 return __xfrm6_state_addr_cmp(tmpl
, x
);
686 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
688 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
690 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
691 return __xfrm_policy_check(sk
, dir
, skb
, family
);
693 return (!xfrm_policy_count
[dir
] && !skb
->sp
) ||
694 (skb
->dst
->flags
& DST_NOPOLICY
) ||
695 __xfrm_policy_check(sk
, dir
, skb
, family
);
698 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
700 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
703 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
705 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
708 extern int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
, unsigned short family
);
709 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
711 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
713 return !xfrm_policy_count
[XFRM_POLICY_OUT
] ||
714 (skb
->dst
->flags
& DST_NOXFRM
) ||
715 __xfrm_route_forward(skb
, family
);
718 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
720 return xfrm_route_forward(skb
, AF_INET
);
723 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
725 return xfrm_route_forward(skb
, AF_INET6
);
728 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
730 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
732 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
733 return __xfrm_sk_clone_policy(sk
);
737 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
739 static inline void xfrm_sk_free_policy(struct sock
*sk
)
741 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
742 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
743 sk
->sk_policy
[0] = NULL
;
745 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
746 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
747 sk
->sk_policy
[1] = NULL
;
753 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
754 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
755 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
756 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
757 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
761 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
765 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
772 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
776 return (xfrm_address_t
*)&fl
->fl4_dst
;
778 return (xfrm_address_t
*)&fl
->fl6_dst
;
784 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
788 return (xfrm_address_t
*)&fl
->fl4_src
;
790 return (xfrm_address_t
*)&fl
->fl6_src
;
795 static __inline__
int
796 __xfrm4_state_addr_check(struct xfrm_state
*x
,
797 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
799 if (daddr
->a4
== x
->id
.daddr
.a4
&&
800 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
805 static __inline__
int
806 __xfrm6_state_addr_check(struct xfrm_state
*x
,
807 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
809 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
810 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
811 ipv6_addr_any((struct in6_addr
*)saddr
) ||
812 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
817 static __inline__
int
818 xfrm_state_addr_check(struct xfrm_state
*x
,
819 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
820 unsigned short family
)
824 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
826 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
831 static __inline__
int
832 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
833 unsigned short family
)
837 return __xfrm4_state_addr_check(x
,
838 (xfrm_address_t
*)&fl
->fl4_dst
,
839 (xfrm_address_t
*)&fl
->fl4_src
);
841 return __xfrm6_state_addr_check(x
,
842 (xfrm_address_t
*)&fl
->fl6_dst
,
843 (xfrm_address_t
*)&fl
->fl6_src
);
848 static inline int xfrm_state_kern(struct xfrm_state
*x
)
850 return atomic_read(&x
->tunnel_users
);
853 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
855 return (!userproto
|| proto
== userproto
||
856 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
857 proto
== IPPROTO_ESP
||
858 proto
== IPPROTO_COMP
)));
862 * xfrm algorithm information
864 struct xfrm_algo_auth_info
{
869 struct xfrm_algo_encr_info
{
874 struct xfrm_algo_comp_info
{
878 struct xfrm_algo_desc
{
883 struct xfrm_algo_auth_info auth
;
884 struct xfrm_algo_encr_info encr
;
885 struct xfrm_algo_comp_info comp
;
887 struct sadb_alg desc
;
890 /* XFRM tunnel handlers. */
892 int (*handler
)(struct sk_buff
*skb
);
893 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
895 struct xfrm_tunnel
*next
;
899 struct xfrm6_tunnel
{
900 int (*handler
)(struct sk_buff
*skb
);
901 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
902 int type
, int code
, int offset
, __be32 info
);
903 struct xfrm6_tunnel
*next
;
907 extern void xfrm_init(void);
908 extern void xfrm4_init(void);
909 extern void xfrm6_init(void);
910 extern void xfrm6_fini(void);
911 extern void xfrm_state_init(void);
912 extern void xfrm4_state_init(void);
913 extern void xfrm6_state_init(void);
914 extern void xfrm6_state_fini(void);
916 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
917 extern struct xfrm_state
*xfrm_state_alloc(void);
918 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
919 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
920 struct xfrm_policy
*pol
, int *err
,
921 unsigned short family
);
922 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
923 extern void xfrm_state_insert(struct xfrm_state
*x
);
924 extern int xfrm_state_add(struct xfrm_state
*x
);
925 extern int xfrm_state_update(struct xfrm_state
*x
);
926 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
927 extern struct xfrm_state
*xfrm_state_lookup_byaddr(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
928 #ifdef CONFIG_XFRM_SUB_POLICY
929 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
930 int n
, unsigned short family
);
931 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
932 int n
, unsigned short family
);
934 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
935 int n
, unsigned short family
)
940 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
941 int n
, unsigned short family
)
947 struct xfrmk_sadinfo
{
948 u32 sadhcnt
; /* current hash bkts */
949 u32 sadhmcnt
; /* max allowed hash bkts */
950 u32 sadcnt
; /* current running count */
953 struct xfrmk_spdinfo
{
964 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
965 extern int xfrm_state_delete(struct xfrm_state
*x
);
966 extern int xfrm_state_flush(u8 proto
, struct xfrm_audit
*audit_info
);
967 extern void xfrm_sad_getinfo(struct xfrmk_sadinfo
*si
);
968 extern void xfrm_spd_getinfo(struct xfrmk_spdinfo
*si
);
969 extern int xfrm_replay_check(struct xfrm_state
*x
, __be32 seq
);
970 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
971 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
972 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
973 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
974 extern int xfrm_init_state(struct xfrm_state
*x
);
975 extern int xfrm4_rcv(struct sk_buff
*skb
);
976 extern int xfrm4_output(struct sk_buff
*skb
);
977 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
978 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
979 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, __be32 spi
);
980 extern int xfrm6_rcv(struct sk_buff
**pskb
);
981 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
982 xfrm_address_t
*saddr
, u8 proto
);
983 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
984 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
985 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
986 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
987 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
988 extern int xfrm6_output(struct sk_buff
*skb
);
989 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
993 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
994 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
995 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
997 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1002 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
1004 /* should not happen */
1008 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
1014 struct xfrm_policy
*xfrm_policy_alloc(gfp_t gfp
);
1015 extern int xfrm_policy_walk(u8 type
, int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1016 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1017 struct xfrm_policy
*xfrm_policy_bysel_ctx(u8 type
, int dir
,
1018 struct xfrm_selector
*sel
,
1019 struct xfrm_sec_ctx
*ctx
, int delete,
1021 struct xfrm_policy
*xfrm_policy_byid(u8
, int dir
, u32 id
, int delete, int *err
);
1022 int xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1023 u32
xfrm_get_acqseq(void);
1024 void xfrm_alloc_spi(struct xfrm_state
*x
, __be32 minspi
, __be32 maxspi
);
1025 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
1026 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1027 int create
, unsigned short family
);
1028 extern int xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1029 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1030 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
1031 struct flowi
*fl
, int family
, int strict
);
1032 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
1034 #ifdef CONFIG_XFRM_MIGRATE
1035 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1036 struct xfrm_migrate
*m
, int num_bundles
);
1037 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1038 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1039 struct xfrm_migrate
*m
);
1040 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1041 struct xfrm_migrate
*m
, int num_bundles
);
1044 extern wait_queue_head_t km_waitq
;
1045 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1046 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1047 extern int km_report(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1049 extern void xfrm_input_init(void);
1050 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1052 extern void xfrm_probe_algs(void);
1053 extern int xfrm_count_auth_supported(void);
1054 extern int xfrm_count_enc_supported(void);
1055 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1056 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1057 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1058 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1059 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1060 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1061 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1062 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1066 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1069 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1070 int offset
, int len
, icv_update_fn_t icv_update
);
1072 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1078 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1080 return ipv6_addr_cmp((struct in6_addr
*)a
,
1081 (struct in6_addr
*)b
);
1085 static inline int xfrm_policy_id2dir(u32 index
)
1090 static inline int xfrm_aevent_is_on(void)
1096 nlsk
= rcu_dereference(xfrm_nl
);
1098 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1103 static inline void xfrm_aevent_doreplay(struct xfrm_state
*x
)
1105 if (xfrm_aevent_is_on())
1106 xfrm_replay_notify(x
, XFRM_REPLAY_UPDATE
);
1109 #ifdef CONFIG_XFRM_MIGRATE
1110 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1112 return (struct xfrm_algo
*)kmemdup(orig
, sizeof(*orig
) + orig
->alg_key_len
, GFP_KERNEL
);
1115 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1118 for (i
= 0; i
< n
; i
++)
1119 xfrm_state_put(*(states
+ i
));
1122 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1125 for (i
= 0; i
< n
; i
++)
1126 xfrm_state_delete(*(states
+ i
));
1130 #endif /* _NET_XFRM_H */