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 list_head bydst
;
98 struct list_head bysrc
;
99 struct list_head byspi
;
105 struct xfrm_selector sel
;
107 /* Key manger bits */
114 /* Parameters of this state. */
119 u8 aalgo
, ealgo
, calgo
;
122 xfrm_address_t saddr
;
127 struct xfrm_lifetime_cfg lft
;
129 /* Data for transformer */
130 struct xfrm_algo
*aalg
;
131 struct xfrm_algo
*ealg
;
132 struct xfrm_algo
*calg
;
134 /* Data for encapsulator */
135 struct xfrm_encap_tmpl
*encap
;
137 /* Data for care-of address */
138 xfrm_address_t
*coaddr
;
140 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
141 struct xfrm_state
*tunnel
;
143 /* If a tunnel, number of users + 1 */
144 atomic_t tunnel_users
;
146 /* State for replay detection */
147 struct xfrm_replay_state replay
;
149 /* Replay detection state at the time we sent the last notification */
150 struct xfrm_replay_state preplay
;
152 /* internal flag that only holds state for delayed aevent at the
157 /* Replay detection notification settings */
161 /* Replay detection notification timer */
162 struct timer_list rtimer
;
165 struct xfrm_stats stats
;
167 struct xfrm_lifetime_cur curlft
;
168 struct timer_list timer
;
173 /* Reference to data common to all the instances of this
175 struct xfrm_type
*type
;
176 struct xfrm_mode
*mode
;
178 /* Security context */
179 struct xfrm_sec_ctx
*security
;
181 /* Private data of this transformer, format is opaque,
182 * interpreted by xfrm_type methods. */
186 /* xflags - make enum if more show up */
187 #define XFRM_TIME_DEFER 1
198 /* callback structure passed from either netlink or pfkey */
216 struct xfrm_policy_afinfo
{
217 unsigned short family
;
218 struct xfrm_type
*type_map
[IPPROTO_MAX
];
219 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
220 struct dst_ops
*dst_ops
;
221 void (*garbage_collect
)(void);
222 int (*dst_lookup
)(struct xfrm_dst
**dst
, struct flowi
*fl
);
223 struct dst_entry
*(*find_bundle
)(struct flowi
*fl
, struct xfrm_policy
*policy
);
224 int (*bundle_create
)(struct xfrm_policy
*policy
,
225 struct xfrm_state
**xfrm
,
228 struct dst_entry
**dst_p
);
229 void (*decode_session
)(struct sk_buff
*skb
,
233 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
234 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
235 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
236 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
237 #define XFRM_ACQ_EXPIRES 30
240 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
241 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
242 extern int __xfrm_state_delete(struct xfrm_state
*x
);
244 struct xfrm_state_afinfo
{
245 unsigned short family
;
246 int (*init_flags
)(struct xfrm_state
*x
);
247 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
248 struct xfrm_tmpl
*tmpl
,
249 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
250 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
251 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
254 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
255 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
257 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
262 struct module
*owner
;
265 #define XFRM_TYPE_NON_FRAGMENT 1
267 int (*init_state
)(struct xfrm_state
*x
);
268 void (*destructor
)(struct xfrm_state
*);
269 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
270 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
271 int (*reject
)(struct xfrm_state
*, struct sk_buff
*, struct flowi
*);
272 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
273 xfrm_address_t
*(*local_addr
)(struct xfrm_state
*, xfrm_address_t
*);
274 xfrm_address_t
*(*remote_addr
)(struct xfrm_state
*, xfrm_address_t
*);
275 /* Estimate maximal size of result of transformation of a dgram */
276 u32 (*get_max_size
)(struct xfrm_state
*, int size
);
279 extern int xfrm_register_type(struct xfrm_type
*type
, unsigned short family
);
280 extern int xfrm_unregister_type(struct xfrm_type
*type
, unsigned short family
);
281 extern struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
);
282 extern void xfrm_put_type(struct xfrm_type
*type
);
285 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
286 int (*output
)(struct sk_buff
*skb
);
288 struct module
*owner
;
292 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
293 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
294 extern struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
);
295 extern void xfrm_put_mode(struct xfrm_mode
*mode
);
299 /* id in template is interpreted as:
300 * daddr - destination of tunnel, may be zero for transport mode.
301 * spi - zero to acquire spi. Not zero if spi is static, then
302 * daddr must be fixed too.
303 * proto - AH/ESP/IPCOMP
307 /* Source address of tunnel. Ignored, if it is not a tunnel. */
308 xfrm_address_t saddr
;
312 /* Mode: transport, tunnel etc. */
315 /* Sharing mode: unique, this session only, this user only etc. */
318 /* May skip this transfomration if no SA is found */
321 /* Bit mask of algos allowed for acquisition */
327 #define XFRM_MAX_DEPTH 6
331 struct xfrm_policy
*next
;
332 struct list_head list
;
334 /* This lock only affects elements except for entry. */
337 struct timer_list timer
;
342 struct xfrm_selector selector
;
343 struct xfrm_lifetime_cfg lft
;
344 struct xfrm_lifetime_cur curlft
;
345 struct dst_entry
*bundles
;
351 struct xfrm_sec_ctx
*security
;
352 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
355 #define XFRM_KM_TIMEOUT 30
357 #define XFRM_REPLAY_SEQ 1
358 #define XFRM_REPLAY_OSEQ 2
359 #define XFRM_REPLAY_SEQ_MASK 3
361 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
362 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
364 /* default aevent timeout in units of 100ms */
365 #define XFRM_AE_ETIME 10
366 /* Async Event timer multiplier */
367 #define XFRM_AE_ETH_M 10
368 /* default seq threshold size */
369 #define XFRM_AE_SEQT_SIZE 2
373 struct list_head list
;
375 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
376 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
377 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
378 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, u16 sport
);
379 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
380 int (*report
)(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
383 extern int xfrm_register_km(struct xfrm_mgr
*km
);
384 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
387 extern struct xfrm_policy
*xfrm_policy_list
[XFRM_POLICY_MAX
*2];
388 #ifdef CONFIG_XFRM_SUB_POLICY
389 extern struct xfrm_policy
*xfrm_policy_list_sub
[XFRM_POLICY_MAX
*2];
391 static inline int xfrm_policy_lists_empty(int dir
)
393 return (!xfrm_policy_list
[dir
] && !xfrm_policy_list_sub
[dir
]);
396 static inline int xfrm_policy_lists_empty(int dir
)
398 return (!xfrm_policy_list
[dir
]);
402 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
404 if (likely(policy
!= NULL
))
405 atomic_inc(&policy
->refcnt
);
408 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
410 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
412 if (atomic_dec_and_test(&policy
->refcnt
))
413 __xfrm_policy_destroy(policy
);
416 #ifdef CONFIG_XFRM_SUB_POLICY
417 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
420 for (i
= npols
- 1; i
>= 0; --i
)
421 xfrm_pol_put(pols
[i
]);
424 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
426 xfrm_pol_put(pols
[0]);
430 extern void __xfrm_state_destroy(struct xfrm_state
*);
432 static inline void __xfrm_state_put(struct xfrm_state
*x
)
434 atomic_dec(&x
->refcnt
);
437 static inline void xfrm_state_put(struct xfrm_state
*x
)
439 if (atomic_dec_and_test(&x
->refcnt
))
440 __xfrm_state_destroy(x
);
443 static inline void xfrm_state_hold(struct xfrm_state
*x
)
445 atomic_inc(&x
->refcnt
);
448 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
455 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
456 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
459 if (memcmp(a1
, a2
, pdw
<< 2))
465 mask
= htonl((0xffffffff) << (32 - pbi
));
467 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
475 u16
xfrm_flowi_sport(struct flowi
*fl
)
482 port
= fl
->fl_ip_sport
;
486 port
= htons(fl
->fl_icmp_type
);
488 #ifdef CONFIG_IPV6_MIP6
490 port
= htons(fl
->fl_mh_type
);
500 u16
xfrm_flowi_dport(struct flowi
*fl
)
507 port
= fl
->fl_ip_dport
;
511 port
= htons(fl
->fl_icmp_code
);
520 __xfrm4_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
)
522 return addr_match(&fl
->fl4_dst
, &sel
->daddr
, sel
->prefixlen_d
) &&
523 addr_match(&fl
->fl4_src
, &sel
->saddr
, sel
->prefixlen_s
) &&
524 !((xfrm_flowi_dport(fl
) ^ sel
->dport
) & sel
->dport_mask
) &&
525 !((xfrm_flowi_sport(fl
) ^ sel
->sport
) & sel
->sport_mask
) &&
526 (fl
->proto
== sel
->proto
|| !sel
->proto
) &&
527 (fl
->oif
== sel
->ifindex
|| !sel
->ifindex
);
531 __xfrm6_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
)
533 return addr_match(&fl
->fl6_dst
, &sel
->daddr
, sel
->prefixlen_d
) &&
534 addr_match(&fl
->fl6_src
, &sel
->saddr
, sel
->prefixlen_s
) &&
535 !((xfrm_flowi_dport(fl
) ^ sel
->dport
) & sel
->dport_mask
) &&
536 !((xfrm_flowi_sport(fl
) ^ sel
->sport
) & sel
->sport_mask
) &&
537 (fl
->proto
== sel
->proto
|| !sel
->proto
) &&
538 (fl
->oif
== sel
->ifindex
|| !sel
->ifindex
);
542 xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
543 unsigned short family
)
547 return __xfrm4_selector_match(sel
, fl
);
549 return __xfrm6_selector_match(sel
, fl
);
554 #ifdef CONFIG_SECURITY_NETWORK_XFRM
555 /* If neither has a context --> match
556 * Otherwise, both must have a context and the sids, doi, alg must match
558 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
560 return ((!s1
&& !s2
) ||
562 (s1
->ctx_sid
== s2
->ctx_sid
) &&
563 (s1
->ctx_doi
== s2
->ctx_doi
) &&
564 (s1
->ctx_alg
== s2
->ctx_alg
)));
567 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
573 /* A struct encoding bundle of transformations to apply to some set of flow.
575 * dst->child points to the next element of bundle.
576 * dst->xfrm points to an instanse of transformer.
578 * Due to unfortunate limitations of current routing cache, which we
579 * have no time to fix, it mirrors struct rtable and bound to the same
580 * routing key, including saddr,daddr. However, we can have many of
581 * bundles differing by session id. All the bundles grow from a parent
587 struct xfrm_dst
*next
;
588 struct dst_entry dst
;
592 struct dst_entry
*route
;
593 u32 route_mtu_cached
;
594 u32 child_mtu_cached
;
599 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
601 dst_release(xdst
->route
);
602 if (likely(xdst
->u
.dst
.xfrm
))
603 xfrm_state_put(xdst
->u
.dst
.xfrm
);
606 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
612 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
615 static inline struct sec_path
*
616 secpath_get(struct sec_path
*sp
)
619 atomic_inc(&sp
->refcnt
);
623 extern void __secpath_destroy(struct sec_path
*sp
);
626 secpath_put(struct sec_path
*sp
)
628 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
629 __secpath_destroy(sp
);
632 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
635 secpath_reset(struct sk_buff
*skb
)
638 secpath_put(skb
->sp
);
644 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
646 return (tmpl
->saddr
.a4
&&
647 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
651 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
653 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
654 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
658 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
662 return __xfrm4_state_addr_cmp(tmpl
, x
);
664 return __xfrm6_state_addr_cmp(tmpl
, x
);
671 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
673 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
675 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
676 return __xfrm_policy_check(sk
, dir
, skb
, family
);
678 return (xfrm_policy_lists_empty(dir
) && !skb
->sp
) ||
679 (skb
->dst
->flags
& DST_NOPOLICY
) ||
680 __xfrm_policy_check(sk
, dir
, skb
, family
);
683 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
685 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
688 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
690 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
693 extern int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
, unsigned short family
);
694 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
696 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
698 return xfrm_policy_lists_empty(XFRM_POLICY_OUT
) ||
699 (skb
->dst
->flags
& DST_NOXFRM
) ||
700 __xfrm_route_forward(skb
, family
);
703 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
705 return xfrm_route_forward(skb
, AF_INET
);
708 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
710 return xfrm_route_forward(skb
, AF_INET6
);
713 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
715 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
717 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
718 return __xfrm_sk_clone_policy(sk
);
722 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
724 static inline void xfrm_sk_free_policy(struct sock
*sk
)
726 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
727 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
728 sk
->sk_policy
[0] = NULL
;
730 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
731 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
732 sk
->sk_policy
[1] = NULL
;
738 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
739 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
740 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
741 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
742 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
746 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
750 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
757 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
761 return (xfrm_address_t
*)&fl
->fl4_dst
;
763 return (xfrm_address_t
*)&fl
->fl6_dst
;
769 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
773 return (xfrm_address_t
*)&fl
->fl4_src
;
775 return (xfrm_address_t
*)&fl
->fl6_src
;
780 static __inline__
int
781 __xfrm4_state_addr_check(struct xfrm_state
*x
,
782 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
784 if (daddr
->a4
== x
->id
.daddr
.a4
&&
785 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
790 static __inline__
int
791 __xfrm6_state_addr_check(struct xfrm_state
*x
,
792 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
794 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
795 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
796 ipv6_addr_any((struct in6_addr
*)saddr
) ||
797 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
802 static __inline__
int
803 xfrm_state_addr_check(struct xfrm_state
*x
,
804 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
805 unsigned short family
)
809 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
811 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
816 static __inline__
int
817 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
818 unsigned short family
)
822 return __xfrm4_state_addr_check(x
,
823 (xfrm_address_t
*)&fl
->fl4_dst
,
824 (xfrm_address_t
*)&fl
->fl4_src
);
826 return __xfrm6_state_addr_check(x
,
827 (xfrm_address_t
*)&fl
->fl6_dst
,
828 (xfrm_address_t
*)&fl
->fl6_src
);
833 static inline int xfrm_state_kern(struct xfrm_state
*x
)
835 return atomic_read(&x
->tunnel_users
);
838 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
840 return (!userproto
|| proto
== userproto
||
841 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
842 proto
== IPPROTO_ESP
||
843 proto
== IPPROTO_COMP
)));
847 * xfrm algorithm information
849 struct xfrm_algo_auth_info
{
854 struct xfrm_algo_encr_info
{
859 struct xfrm_algo_comp_info
{
863 struct xfrm_algo_desc
{
868 struct xfrm_algo_auth_info auth
;
869 struct xfrm_algo_encr_info encr
;
870 struct xfrm_algo_comp_info comp
;
872 struct sadb_alg desc
;
875 /* XFRM tunnel handlers. */
877 int (*handler
)(struct sk_buff
*skb
);
878 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
880 struct xfrm_tunnel
*next
;
884 struct xfrm6_tunnel
{
885 int (*handler
)(struct sk_buff
*skb
);
886 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
887 int type
, int code
, int offset
, __u32 info
);
889 struct xfrm6_tunnel
*next
;
893 extern void xfrm_init(void);
894 extern void xfrm4_init(void);
895 extern void xfrm6_init(void);
896 extern void xfrm6_fini(void);
897 extern void xfrm_state_init(void);
898 extern void xfrm4_state_init(void);
899 extern void xfrm6_state_init(void);
900 extern void xfrm6_state_fini(void);
902 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
903 extern struct xfrm_state
*xfrm_state_alloc(void);
904 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
905 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
906 struct xfrm_policy
*pol
, int *err
,
907 unsigned short family
);
908 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
909 extern void xfrm_state_insert(struct xfrm_state
*x
);
910 extern int xfrm_state_add(struct xfrm_state
*x
);
911 extern int xfrm_state_update(struct xfrm_state
*x
);
912 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, u32 spi
, u8 proto
, unsigned short family
);
913 extern struct xfrm_state
*xfrm_state_lookup_byaddr(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
914 #ifdef CONFIG_XFRM_SUB_POLICY
915 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
916 int n
, unsigned short family
);
917 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
918 int n
, unsigned short family
);
920 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
921 int n
, unsigned short family
)
926 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
927 int n
, unsigned short family
)
932 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
933 extern int xfrm_state_delete(struct xfrm_state
*x
);
934 extern void xfrm_state_flush(u8 proto
);
935 extern int xfrm_replay_check(struct xfrm_state
*x
, u32 seq
);
936 extern void xfrm_replay_advance(struct xfrm_state
*x
, u32 seq
);
937 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
938 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
939 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
940 extern int xfrm_init_state(struct xfrm_state
*x
);
941 extern int xfrm4_rcv(struct sk_buff
*skb
);
942 extern int xfrm4_output(struct sk_buff
*skb
);
943 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
);
944 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
);
945 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, u32 spi
);
946 extern int xfrm6_rcv(struct sk_buff
**pskb
);
947 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
948 xfrm_address_t
*saddr
, u8 proto
);
949 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
);
950 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
);
951 extern u32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
952 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
953 extern u32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
954 extern int xfrm6_output(struct sk_buff
*skb
);
955 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
959 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
960 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
961 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
963 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
968 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
970 /* should not happen */
974 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
980 struct xfrm_policy
*xfrm_policy_alloc(gfp_t gfp
);
981 extern int xfrm_policy_walk(u8 type
, int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
982 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
983 struct xfrm_policy
*xfrm_policy_bysel_ctx(u8 type
, int dir
,
984 struct xfrm_selector
*sel
,
985 struct xfrm_sec_ctx
*ctx
, int delete);
986 struct xfrm_policy
*xfrm_policy_byid(u8
, int dir
, u32 id
, int delete);
987 void xfrm_policy_flush(u8 type
);
988 u32
xfrm_get_acqseq(void);
989 void xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
990 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
991 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
992 int create
, unsigned short family
);
993 extern void xfrm_policy_flush(u8 type
);
994 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
995 extern int xfrm_flush_bundles(void);
996 extern void xfrm_flush_all_bundles(void);
997 extern int xfrm_bundle_ok(struct xfrm_dst
*xdst
, struct flowi
*fl
, int family
, int strict
);
998 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
1000 extern wait_queue_head_t km_waitq
;
1001 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, u16 sport
);
1002 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1003 extern int km_report(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1005 extern void xfrm_input_init(void);
1006 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, u32
*spi
, u32
*seq
);
1008 extern void xfrm_probe_algs(void);
1009 extern int xfrm_count_auth_supported(void);
1010 extern int xfrm_count_enc_supported(void);
1011 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1012 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1013 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1014 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1015 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1016 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1017 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1018 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1022 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1025 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1026 int offset
, int len
, icv_update_fn_t icv_update
);
1028 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1034 return a
->a4
- b
->a4
;
1036 return ipv6_addr_cmp((struct in6_addr
*)a
,
1037 (struct in6_addr
*)b
);
1041 static inline int xfrm_policy_id2dir(u32 index
)
1046 static inline int xfrm_aevent_is_on(void)
1052 nlsk
= rcu_dereference(xfrm_nl
);
1054 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1059 static inline void xfrm_aevent_doreplay(struct xfrm_state
*x
)
1061 if (xfrm_aevent_is_on())
1062 xfrm_replay_notify(x
, XFRM_REPLAY_UPDATE
);
1066 #endif /* _NET_XFRM_H */