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 */
430 #ifdef CONFIG_AUDITSYSCALL
431 extern void xfrm_audit_log(uid_t auid
, u32 secid
, int type
, int result
,
432 struct xfrm_policy
*xp
, struct xfrm_state
*x
);
434 #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0)
435 #endif /* CONFIG_AUDITSYSCALL */
437 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
439 if (likely(policy
!= NULL
))
440 atomic_inc(&policy
->refcnt
);
443 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
445 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
447 if (atomic_dec_and_test(&policy
->refcnt
))
448 __xfrm_policy_destroy(policy
);
451 #ifdef CONFIG_XFRM_SUB_POLICY
452 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
455 for (i
= npols
- 1; i
>= 0; --i
)
456 xfrm_pol_put(pols
[i
]);
459 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
461 xfrm_pol_put(pols
[0]);
465 extern void __xfrm_state_destroy(struct xfrm_state
*);
467 static inline void __xfrm_state_put(struct xfrm_state
*x
)
469 atomic_dec(&x
->refcnt
);
472 static inline void xfrm_state_put(struct xfrm_state
*x
)
474 if (atomic_dec_and_test(&x
->refcnt
))
475 __xfrm_state_destroy(x
);
478 static inline void xfrm_state_hold(struct xfrm_state
*x
)
480 atomic_inc(&x
->refcnt
);
483 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
490 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
491 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
494 if (memcmp(a1
, a2
, pdw
<< 2))
500 mask
= htonl((0xffffffff) << (32 - pbi
));
502 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
510 __be16
xfrm_flowi_sport(struct flowi
*fl
)
516 case IPPROTO_UDPLITE
:
518 port
= fl
->fl_ip_sport
;
522 port
= htons(fl
->fl_icmp_type
);
524 #ifdef CONFIG_IPV6_MIP6
526 port
= htons(fl
->fl_mh_type
);
536 __be16
xfrm_flowi_dport(struct flowi
*fl
)
542 case IPPROTO_UDPLITE
:
544 port
= fl
->fl_ip_dport
;
548 port
= htons(fl
->fl_icmp_code
);
556 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
557 unsigned short family
);
559 #ifdef CONFIG_SECURITY_NETWORK_XFRM
560 /* If neither has a context --> match
561 * Otherwise, both must have a context and the sids, doi, alg must match
563 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
565 return ((!s1
&& !s2
) ||
567 (s1
->ctx_sid
== s2
->ctx_sid
) &&
568 (s1
->ctx_doi
== s2
->ctx_doi
) &&
569 (s1
->ctx_alg
== s2
->ctx_alg
)));
572 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
578 /* A struct encoding bundle of transformations to apply to some set of flow.
580 * dst->child points to the next element of bundle.
581 * dst->xfrm points to an instanse of transformer.
583 * Due to unfortunate limitations of current routing cache, which we
584 * have no time to fix, it mirrors struct rtable and bound to the same
585 * routing key, including saddr,daddr. However, we can have many of
586 * bundles differing by session id. All the bundles grow from a parent
592 struct xfrm_dst
*next
;
593 struct dst_entry dst
;
597 struct dst_entry
*route
;
598 #ifdef CONFIG_XFRM_SUB_POLICY
599 struct flowi
*origin
;
600 struct xfrm_selector
*partner
;
603 u32 route_mtu_cached
;
604 u32 child_mtu_cached
;
609 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
611 dst_release(xdst
->route
);
612 if (likely(xdst
->u
.dst
.xfrm
))
613 xfrm_state_put(xdst
->u
.dst
.xfrm
);
614 #ifdef CONFIG_XFRM_SUB_POLICY
617 kfree(xdst
->partner
);
618 xdst
->partner
= NULL
;
622 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
628 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
631 static inline struct sec_path
*
632 secpath_get(struct sec_path
*sp
)
635 atomic_inc(&sp
->refcnt
);
639 extern void __secpath_destroy(struct sec_path
*sp
);
642 secpath_put(struct sec_path
*sp
)
644 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
645 __secpath_destroy(sp
);
648 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
651 secpath_reset(struct sk_buff
*skb
)
654 secpath_put(skb
->sp
);
660 xfrm_addr_any(xfrm_address_t
*addr
, unsigned short family
)
664 return addr
->a4
== 0;
666 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
672 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
674 return (tmpl
->saddr
.a4
&&
675 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
679 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
681 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
682 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
686 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
690 return __xfrm4_state_addr_cmp(tmpl
, x
);
692 return __xfrm6_state_addr_cmp(tmpl
, x
);
699 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
701 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
703 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
704 return __xfrm_policy_check(sk
, dir
, skb
, family
);
706 return (!xfrm_policy_count
[dir
] && !skb
->sp
) ||
707 (skb
->dst
->flags
& DST_NOPOLICY
) ||
708 __xfrm_policy_check(sk
, dir
, skb
, family
);
711 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
713 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
716 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
718 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
721 extern int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
, unsigned short family
);
722 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
724 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
726 return !xfrm_policy_count
[XFRM_POLICY_OUT
] ||
727 (skb
->dst
->flags
& DST_NOXFRM
) ||
728 __xfrm_route_forward(skb
, family
);
731 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
733 return xfrm_route_forward(skb
, AF_INET
);
736 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
738 return xfrm_route_forward(skb
, AF_INET6
);
741 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
743 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
745 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
746 return __xfrm_sk_clone_policy(sk
);
750 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
752 static inline void xfrm_sk_free_policy(struct sock
*sk
)
754 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
755 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
756 sk
->sk_policy
[0] = NULL
;
758 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
759 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
760 sk
->sk_policy
[1] = NULL
;
766 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
767 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
768 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
769 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
770 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
774 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
778 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
785 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
789 return (xfrm_address_t
*)&fl
->fl4_dst
;
791 return (xfrm_address_t
*)&fl
->fl6_dst
;
797 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
801 return (xfrm_address_t
*)&fl
->fl4_src
;
803 return (xfrm_address_t
*)&fl
->fl6_src
;
808 static __inline__
int
809 __xfrm4_state_addr_check(struct xfrm_state
*x
,
810 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
812 if (daddr
->a4
== x
->id
.daddr
.a4
&&
813 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
818 static __inline__
int
819 __xfrm6_state_addr_check(struct xfrm_state
*x
,
820 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
822 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
823 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
824 ipv6_addr_any((struct in6_addr
*)saddr
) ||
825 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
830 static __inline__
int
831 xfrm_state_addr_check(struct xfrm_state
*x
,
832 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
833 unsigned short family
)
837 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
839 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
844 static __inline__
int
845 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
846 unsigned short family
)
850 return __xfrm4_state_addr_check(x
,
851 (xfrm_address_t
*)&fl
->fl4_dst
,
852 (xfrm_address_t
*)&fl
->fl4_src
);
854 return __xfrm6_state_addr_check(x
,
855 (xfrm_address_t
*)&fl
->fl6_dst
,
856 (xfrm_address_t
*)&fl
->fl6_src
);
861 static inline int xfrm_state_kern(struct xfrm_state
*x
)
863 return atomic_read(&x
->tunnel_users
);
866 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
868 return (!userproto
|| proto
== userproto
||
869 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
870 proto
== IPPROTO_ESP
||
871 proto
== IPPROTO_COMP
)));
875 * xfrm algorithm information
877 struct xfrm_algo_auth_info
{
882 struct xfrm_algo_encr_info
{
887 struct xfrm_algo_comp_info
{
891 struct xfrm_algo_desc
{
896 struct xfrm_algo_auth_info auth
;
897 struct xfrm_algo_encr_info encr
;
898 struct xfrm_algo_comp_info comp
;
900 struct sadb_alg desc
;
903 /* XFRM tunnel handlers. */
905 int (*handler
)(struct sk_buff
*skb
);
906 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
908 struct xfrm_tunnel
*next
;
912 struct xfrm6_tunnel
{
913 int (*handler
)(struct sk_buff
*skb
);
914 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
915 int type
, int code
, int offset
, __be32 info
);
916 struct xfrm6_tunnel
*next
;
920 extern void xfrm_init(void);
921 extern void xfrm4_init(void);
922 extern void xfrm6_init(void);
923 extern void xfrm6_fini(void);
924 extern void xfrm_state_init(void);
925 extern void xfrm4_state_init(void);
926 extern void xfrm6_state_init(void);
927 extern void xfrm6_state_fini(void);
929 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
930 extern struct xfrm_state
*xfrm_state_alloc(void);
931 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
932 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
933 struct xfrm_policy
*pol
, int *err
,
934 unsigned short family
);
935 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
936 extern void xfrm_state_insert(struct xfrm_state
*x
);
937 extern int xfrm_state_add(struct xfrm_state
*x
);
938 extern int xfrm_state_update(struct xfrm_state
*x
);
939 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
940 extern struct xfrm_state
*xfrm_state_lookup_byaddr(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
941 #ifdef CONFIG_XFRM_SUB_POLICY
942 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
943 int n
, unsigned short family
);
944 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
945 int n
, unsigned short family
);
947 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
948 int n
, unsigned short family
)
953 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
954 int n
, unsigned short family
)
960 struct xfrmk_sadinfo
{
961 u32 sadhcnt
; /* current hash bkts */
962 u32 sadhmcnt
; /* max allowed hash bkts */
963 u32 sadcnt
; /* current running count */
966 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
967 extern int xfrm_state_delete(struct xfrm_state
*x
);
968 extern void xfrm_state_flush(u8 proto
, struct xfrm_audit
*audit_info
);
969 extern void xfrm_sad_getinfo(struct xfrmk_sadinfo
*si
);
970 extern void xfrm_spd_getinfo(struct xfrm_spdinfo
*si
);
971 extern int xfrm_replay_check(struct xfrm_state
*x
, __be32 seq
);
972 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
973 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
974 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
975 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
976 extern int xfrm_init_state(struct xfrm_state
*x
);
977 extern int xfrm4_rcv(struct sk_buff
*skb
);
978 extern int xfrm4_output(struct sk_buff
*skb
);
979 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
980 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
981 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, __be32 spi
);
982 extern int xfrm6_rcv(struct sk_buff
**pskb
);
983 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
984 xfrm_address_t
*saddr
, u8 proto
);
985 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
986 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
987 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
988 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
989 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
990 extern int xfrm6_output(struct sk_buff
*skb
);
991 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
995 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
996 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
997 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
999 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1001 return -ENOPROTOOPT
;
1004 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
1006 /* should not happen */
1010 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
1016 struct xfrm_policy
*xfrm_policy_alloc(gfp_t gfp
);
1017 extern int xfrm_policy_walk(u8 type
, int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1018 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1019 struct xfrm_policy
*xfrm_policy_bysel_ctx(u8 type
, int dir
,
1020 struct xfrm_selector
*sel
,
1021 struct xfrm_sec_ctx
*ctx
, int delete,
1023 struct xfrm_policy
*xfrm_policy_byid(u8
, int dir
, u32 id
, int delete, int *err
);
1024 void xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1025 u32
xfrm_get_acqseq(void);
1026 void xfrm_alloc_spi(struct xfrm_state
*x
, __be32 minspi
, __be32 maxspi
);
1027 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
1028 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1029 int create
, unsigned short family
);
1030 extern void xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1031 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1032 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
1033 struct flowi
*fl
, int family
, int strict
);
1034 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
1036 #ifdef CONFIG_XFRM_MIGRATE
1037 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1038 struct xfrm_migrate
*m
, int num_bundles
);
1039 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1040 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1041 struct xfrm_migrate
*m
);
1042 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1043 struct xfrm_migrate
*m
, int num_bundles
);
1046 extern wait_queue_head_t km_waitq
;
1047 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1048 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1049 extern int km_report(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1051 extern void xfrm_input_init(void);
1052 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1054 extern void xfrm_probe_algs(void);
1055 extern int xfrm_count_auth_supported(void);
1056 extern int xfrm_count_enc_supported(void);
1057 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1058 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1059 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1060 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1061 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1062 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1063 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1064 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1068 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1071 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1072 int offset
, int len
, icv_update_fn_t icv_update
);
1074 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1080 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1082 return ipv6_addr_cmp((struct in6_addr
*)a
,
1083 (struct in6_addr
*)b
);
1087 static inline int xfrm_policy_id2dir(u32 index
)
1092 static inline int xfrm_aevent_is_on(void)
1098 nlsk
= rcu_dereference(xfrm_nl
);
1100 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1105 static inline void xfrm_aevent_doreplay(struct xfrm_state
*x
)
1107 if (xfrm_aevent_is_on())
1108 xfrm_replay_notify(x
, XFRM_REPLAY_UPDATE
);
1111 #ifdef CONFIG_XFRM_MIGRATE
1112 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1114 return (struct xfrm_algo
*)kmemdup(orig
, sizeof(*orig
) + orig
->alg_key_len
, GFP_KERNEL
);
1117 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1120 for (i
= 0; i
< n
; i
++)
1121 xfrm_state_put(*(states
+ i
));
1124 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1127 for (i
= 0; i
< n
; i
++)
1128 xfrm_state_delete(*(states
+ i
));
1132 #endif /* _NET_XFRM_H */