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
);
240 #define XFRM_ACQ_EXPIRES 30
243 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
244 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
245 extern int __xfrm_state_delete(struct xfrm_state
*x
);
247 struct xfrm_state_afinfo
{
248 unsigned short family
;
249 int (*init_flags
)(struct xfrm_state
*x
);
250 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
251 struct xfrm_tmpl
*tmpl
,
252 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
253 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
254 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
255 int (*output
)(struct sk_buff
*skb
);
258 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
259 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
260 extern struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned short family
);
261 extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo
*afinfo
);
263 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
268 struct module
*owner
;
271 #define XFRM_TYPE_NON_FRAGMENT 1
273 int (*init_state
)(struct xfrm_state
*x
);
274 void (*destructor
)(struct xfrm_state
*);
275 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
276 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
277 int (*reject
)(struct xfrm_state
*, struct sk_buff
*, struct flowi
*);
278 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
279 xfrm_address_t
*(*local_addr
)(struct xfrm_state
*, xfrm_address_t
*);
280 xfrm_address_t
*(*remote_addr
)(struct xfrm_state
*, xfrm_address_t
*);
281 /* Estimate maximal size of result of transformation of a dgram */
282 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
285 extern int xfrm_register_type(struct xfrm_type
*type
, unsigned short family
);
286 extern int xfrm_unregister_type(struct xfrm_type
*type
, unsigned short family
);
287 extern struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
);
288 extern void xfrm_put_type(struct xfrm_type
*type
);
291 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
292 int (*output
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
294 struct module
*owner
;
298 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
299 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
300 extern struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
);
301 extern void xfrm_put_mode(struct xfrm_mode
*mode
);
305 /* id in template is interpreted as:
306 * daddr - destination of tunnel, may be zero for transport mode.
307 * spi - zero to acquire spi. Not zero if spi is static, then
308 * daddr must be fixed too.
309 * proto - AH/ESP/IPCOMP
313 /* Source address of tunnel. Ignored, if it is not a tunnel. */
314 xfrm_address_t saddr
;
316 unsigned short encap_family
;
320 /* Mode: transport, tunnel etc. */
323 /* Sharing mode: unique, this session only, this user only etc. */
326 /* May skip this transfomration if no SA is found */
329 /* Bit mask of algos allowed for acquisition */
335 #define XFRM_MAX_DEPTH 6
339 struct xfrm_policy
*next
;
340 struct hlist_node bydst
;
341 struct hlist_node byidx
;
343 /* This lock only affects elements except for entry. */
346 struct timer_list timer
;
350 struct xfrm_selector selector
;
351 struct xfrm_lifetime_cfg lft
;
352 struct xfrm_lifetime_cur curlft
;
353 struct dst_entry
*bundles
;
360 /* XXX 1 byte hole, try to pack */
361 struct xfrm_sec_ctx
*security
;
362 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
365 struct xfrm_migrate
{
366 xfrm_address_t old_daddr
;
367 xfrm_address_t old_saddr
;
368 xfrm_address_t new_daddr
;
369 xfrm_address_t new_saddr
;
378 #define XFRM_KM_TIMEOUT 30
380 #define XFRM_REPLAY_SEQ 1
381 #define XFRM_REPLAY_OSEQ 2
382 #define XFRM_REPLAY_SEQ_MASK 3
384 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
385 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
387 /* default aevent timeout in units of 100ms */
388 #define XFRM_AE_ETIME 10
389 /* Async Event timer multiplier */
390 #define XFRM_AE_ETH_M 10
391 /* default seq threshold size */
392 #define XFRM_AE_SEQT_SIZE 2
396 struct list_head list
;
398 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
399 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
400 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
401 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
402 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
403 int (*report
)(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
404 int (*migrate
)(struct xfrm_selector
*sel
, u8 dir
, u8 type
, struct xfrm_migrate
*m
, int num_bundles
);
407 extern int xfrm_register_km(struct xfrm_mgr
*km
);
408 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
410 extern unsigned int xfrm_policy_count
[XFRM_POLICY_MAX
*2];
412 /* Audit Information */
419 /* SAD metadata, add more later */
422 u32 sadhcnt
; /* current hash bkts */
423 u32 sadhmcnt
; /* max allowed hash bkts */
424 u32 sadcnt
; /* current running count */
438 #ifdef CONFIG_AUDITSYSCALL
439 extern void xfrm_audit_log(uid_t auid
, u32 secid
, int type
, int result
,
440 struct xfrm_policy
*xp
, struct xfrm_state
*x
);
442 #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0)
443 #endif /* CONFIG_AUDITSYSCALL */
445 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
447 if (likely(policy
!= NULL
))
448 atomic_inc(&policy
->refcnt
);
451 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
453 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
455 if (atomic_dec_and_test(&policy
->refcnt
))
456 __xfrm_policy_destroy(policy
);
459 #ifdef CONFIG_XFRM_SUB_POLICY
460 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
463 for (i
= npols
- 1; i
>= 0; --i
)
464 xfrm_pol_put(pols
[i
]);
467 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
469 xfrm_pol_put(pols
[0]);
473 extern void __xfrm_state_destroy(struct xfrm_state
*);
475 static inline void __xfrm_state_put(struct xfrm_state
*x
)
477 atomic_dec(&x
->refcnt
);
480 static inline void xfrm_state_put(struct xfrm_state
*x
)
482 if (atomic_dec_and_test(&x
->refcnt
))
483 __xfrm_state_destroy(x
);
486 static inline void xfrm_state_hold(struct xfrm_state
*x
)
488 atomic_inc(&x
->refcnt
);
491 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
498 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
499 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
502 if (memcmp(a1
, a2
, pdw
<< 2))
508 mask
= htonl((0xffffffff) << (32 - pbi
));
510 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
518 __be16
xfrm_flowi_sport(struct flowi
*fl
)
524 case IPPROTO_UDPLITE
:
526 port
= fl
->fl_ip_sport
;
530 port
= htons(fl
->fl_icmp_type
);
532 #ifdef CONFIG_IPV6_MIP6
534 port
= htons(fl
->fl_mh_type
);
544 __be16
xfrm_flowi_dport(struct flowi
*fl
)
550 case IPPROTO_UDPLITE
:
552 port
= fl
->fl_ip_dport
;
556 port
= htons(fl
->fl_icmp_code
);
564 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
565 unsigned short family
);
567 #ifdef CONFIG_SECURITY_NETWORK_XFRM
568 /* If neither has a context --> match
569 * Otherwise, both must have a context and the sids, doi, alg must match
571 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
573 return ((!s1
&& !s2
) ||
575 (s1
->ctx_sid
== s2
->ctx_sid
) &&
576 (s1
->ctx_doi
== s2
->ctx_doi
) &&
577 (s1
->ctx_alg
== s2
->ctx_alg
)));
580 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
586 /* A struct encoding bundle of transformations to apply to some set of flow.
588 * dst->child points to the next element of bundle.
589 * dst->xfrm points to an instanse of transformer.
591 * Due to unfortunate limitations of current routing cache, which we
592 * have no time to fix, it mirrors struct rtable and bound to the same
593 * routing key, including saddr,daddr. However, we can have many of
594 * bundles differing by session id. All the bundles grow from a parent
600 struct xfrm_dst
*next
;
601 struct dst_entry dst
;
605 struct dst_entry
*route
;
606 #ifdef CONFIG_XFRM_SUB_POLICY
607 struct flowi
*origin
;
608 struct xfrm_selector
*partner
;
611 u32 route_mtu_cached
;
612 u32 child_mtu_cached
;
617 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
619 dst_release(xdst
->route
);
620 if (likely(xdst
->u
.dst
.xfrm
))
621 xfrm_state_put(xdst
->u
.dst
.xfrm
);
622 #ifdef CONFIG_XFRM_SUB_POLICY
625 kfree(xdst
->partner
);
626 xdst
->partner
= NULL
;
630 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
636 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
639 static inline struct sec_path
*
640 secpath_get(struct sec_path
*sp
)
643 atomic_inc(&sp
->refcnt
);
647 extern void __secpath_destroy(struct sec_path
*sp
);
650 secpath_put(struct sec_path
*sp
)
652 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
653 __secpath_destroy(sp
);
656 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
659 secpath_reset(struct sk_buff
*skb
)
662 secpath_put(skb
->sp
);
668 xfrm_addr_any(xfrm_address_t
*addr
, unsigned short family
)
672 return addr
->a4
== 0;
674 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
680 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
682 return (tmpl
->saddr
.a4
&&
683 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
687 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
689 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
690 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
694 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
698 return __xfrm4_state_addr_cmp(tmpl
, x
);
700 return __xfrm6_state_addr_cmp(tmpl
, x
);
707 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
709 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
711 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
712 return __xfrm_policy_check(sk
, dir
, skb
, family
);
714 return (!xfrm_policy_count
[dir
] && !skb
->sp
) ||
715 (skb
->dst
->flags
& DST_NOPOLICY
) ||
716 __xfrm_policy_check(sk
, dir
, skb
, family
);
719 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
721 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
724 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
726 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
729 extern int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
, unsigned short family
);
730 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
732 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
734 return !xfrm_policy_count
[XFRM_POLICY_OUT
] ||
735 (skb
->dst
->flags
& DST_NOXFRM
) ||
736 __xfrm_route_forward(skb
, family
);
739 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
741 return xfrm_route_forward(skb
, AF_INET
);
744 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
746 return xfrm_route_forward(skb
, AF_INET6
);
749 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
751 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
753 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
754 return __xfrm_sk_clone_policy(sk
);
758 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
760 static inline void xfrm_sk_free_policy(struct sock
*sk
)
762 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
763 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
764 sk
->sk_policy
[0] = NULL
;
766 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
767 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
768 sk
->sk_policy
[1] = NULL
;
774 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
775 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
776 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
777 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
778 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
782 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
786 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
793 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
797 return (xfrm_address_t
*)&fl
->fl4_dst
;
799 return (xfrm_address_t
*)&fl
->fl6_dst
;
805 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
809 return (xfrm_address_t
*)&fl
->fl4_src
;
811 return (xfrm_address_t
*)&fl
->fl6_src
;
816 static __inline__
int
817 __xfrm4_state_addr_check(struct xfrm_state
*x
,
818 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
820 if (daddr
->a4
== x
->id
.daddr
.a4
&&
821 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
826 static __inline__
int
827 __xfrm6_state_addr_check(struct xfrm_state
*x
,
828 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
830 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
831 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
832 ipv6_addr_any((struct in6_addr
*)saddr
) ||
833 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
838 static __inline__
int
839 xfrm_state_addr_check(struct xfrm_state
*x
,
840 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
841 unsigned short family
)
845 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
847 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
852 static __inline__
int
853 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
854 unsigned short family
)
858 return __xfrm4_state_addr_check(x
,
859 (xfrm_address_t
*)&fl
->fl4_dst
,
860 (xfrm_address_t
*)&fl
->fl4_src
);
862 return __xfrm6_state_addr_check(x
,
863 (xfrm_address_t
*)&fl
->fl6_dst
,
864 (xfrm_address_t
*)&fl
->fl6_src
);
869 static inline int xfrm_state_kern(struct xfrm_state
*x
)
871 return atomic_read(&x
->tunnel_users
);
874 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
876 return (!userproto
|| proto
== userproto
||
877 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
878 proto
== IPPROTO_ESP
||
879 proto
== IPPROTO_COMP
)));
883 * xfrm algorithm information
885 struct xfrm_algo_auth_info
{
890 struct xfrm_algo_encr_info
{
895 struct xfrm_algo_comp_info
{
899 struct xfrm_algo_desc
{
904 struct xfrm_algo_auth_info auth
;
905 struct xfrm_algo_encr_info encr
;
906 struct xfrm_algo_comp_info comp
;
908 struct sadb_alg desc
;
911 /* XFRM tunnel handlers. */
913 int (*handler
)(struct sk_buff
*skb
);
914 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
916 struct xfrm_tunnel
*next
;
920 struct xfrm6_tunnel
{
921 int (*handler
)(struct sk_buff
*skb
);
922 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
923 int type
, int code
, int offset
, __be32 info
);
924 struct xfrm6_tunnel
*next
;
928 extern void xfrm_init(void);
929 extern void xfrm4_init(void);
930 extern void xfrm6_init(void);
931 extern void xfrm6_fini(void);
932 extern void xfrm_state_init(void);
933 extern void xfrm4_state_init(void);
934 extern void xfrm6_state_init(void);
935 extern void xfrm6_state_fini(void);
937 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
938 extern struct xfrm_state
*xfrm_state_alloc(void);
939 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
940 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
941 struct xfrm_policy
*pol
, int *err
,
942 unsigned short family
);
943 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
944 extern void xfrm_state_insert(struct xfrm_state
*x
);
945 extern int xfrm_state_add(struct xfrm_state
*x
);
946 extern int xfrm_state_update(struct xfrm_state
*x
);
947 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
948 extern struct xfrm_state
*xfrm_state_lookup_byaddr(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
949 #ifdef CONFIG_XFRM_SUB_POLICY
950 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
951 int n
, unsigned short family
);
952 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
953 int n
, unsigned short family
);
955 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
956 int n
, unsigned short family
)
961 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
962 int n
, unsigned short family
)
967 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
968 extern int xfrm_state_delete(struct xfrm_state
*x
);
969 extern void xfrm_state_flush(u8 proto
, struct xfrm_audit
*audit_info
);
970 extern void xfrm_sad_getinfo(struct xfrm_sadinfo
*si
);
971 extern void xfrm_spd_getinfo(struct xfrm_spdinfo
*si
);
972 extern int xfrm_replay_check(struct xfrm_state
*x
, __be32 seq
);
973 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
974 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
975 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
976 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
977 extern int xfrm_init_state(struct xfrm_state
*x
);
978 extern int xfrm4_rcv(struct sk_buff
*skb
);
979 extern int xfrm4_output(struct sk_buff
*skb
);
980 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
981 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
982 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, __be32 spi
);
983 extern int xfrm6_rcv(struct sk_buff
**pskb
);
984 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
985 xfrm_address_t
*saddr
, u8 proto
);
986 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
987 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
988 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
989 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
990 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
991 extern int xfrm6_output(struct sk_buff
*skb
);
992 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
996 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
997 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
998 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
1000 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1002 return -ENOPROTOOPT
;
1005 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
1007 /* should not happen */
1011 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
1017 struct xfrm_policy
*xfrm_policy_alloc(gfp_t gfp
);
1018 extern int xfrm_policy_walk(u8 type
, int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1019 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1020 struct xfrm_policy
*xfrm_policy_bysel_ctx(u8 type
, int dir
,
1021 struct xfrm_selector
*sel
,
1022 struct xfrm_sec_ctx
*ctx
, int delete,
1024 struct xfrm_policy
*xfrm_policy_byid(u8
, int dir
, u32 id
, int delete, int *err
);
1025 void xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1026 u32
xfrm_get_acqseq(void);
1027 void xfrm_alloc_spi(struct xfrm_state
*x
, __be32 minspi
, __be32 maxspi
);
1028 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
1029 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1030 int create
, unsigned short family
);
1031 extern void xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1032 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1033 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
1034 struct flowi
*fl
, int family
, int strict
);
1035 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
1037 #ifdef CONFIG_XFRM_MIGRATE
1038 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1039 struct xfrm_migrate
*m
, int num_bundles
);
1040 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1041 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1042 struct xfrm_migrate
*m
);
1043 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1044 struct xfrm_migrate
*m
, int num_bundles
);
1047 extern wait_queue_head_t km_waitq
;
1048 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1049 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1050 extern int km_report(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1052 extern void xfrm_input_init(void);
1053 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1055 extern void xfrm_probe_algs(void);
1056 extern int xfrm_count_auth_supported(void);
1057 extern int xfrm_count_enc_supported(void);
1058 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1059 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1060 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1061 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1062 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1063 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1064 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1065 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1069 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1072 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1073 int offset
, int len
, icv_update_fn_t icv_update
);
1075 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1081 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1083 return ipv6_addr_cmp((struct in6_addr
*)a
,
1084 (struct in6_addr
*)b
);
1088 static inline int xfrm_policy_id2dir(u32 index
)
1093 static inline int xfrm_aevent_is_on(void)
1099 nlsk
= rcu_dereference(xfrm_nl
);
1101 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1106 static inline void xfrm_aevent_doreplay(struct xfrm_state
*x
)
1108 if (xfrm_aevent_is_on())
1109 xfrm_replay_notify(x
, XFRM_REPLAY_UPDATE
);
1112 #ifdef CONFIG_XFRM_MIGRATE
1113 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1115 return (struct xfrm_algo
*)kmemdup(orig
, sizeof(*orig
) + orig
->alg_key_len
, GFP_KERNEL
);
1118 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1121 for (i
= 0; i
< n
; i
++)
1122 xfrm_state_put(*(states
+ i
));
1125 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1128 for (i
= 0; i
< n
; i
++)
1129 xfrm_state_delete(*(states
+ i
));
1133 #endif /* _NET_XFRM_H */