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
);
257 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
258 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
260 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
265 struct module
*owner
;
268 #define XFRM_TYPE_NON_FRAGMENT 1
270 int (*init_state
)(struct xfrm_state
*x
);
271 void (*destructor
)(struct xfrm_state
*);
272 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
273 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
274 int (*reject
)(struct xfrm_state
*, struct sk_buff
*, struct flowi
*);
275 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
276 xfrm_address_t
*(*local_addr
)(struct xfrm_state
*, xfrm_address_t
*);
277 xfrm_address_t
*(*remote_addr
)(struct xfrm_state
*, xfrm_address_t
*);
278 /* Estimate maximal size of result of transformation of a dgram */
279 u32 (*get_max_size
)(struct xfrm_state
*, int size
);
282 extern int xfrm_register_type(struct xfrm_type
*type
, unsigned short family
);
283 extern int xfrm_unregister_type(struct xfrm_type
*type
, unsigned short family
);
284 extern struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
);
285 extern void xfrm_put_type(struct xfrm_type
*type
);
288 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
289 int (*output
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
291 struct module
*owner
;
295 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
296 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
297 extern struct xfrm_mode
*xfrm_get_mode(unsigned int encap
, int family
);
298 extern void xfrm_put_mode(struct xfrm_mode
*mode
);
302 /* id in template is interpreted as:
303 * daddr - destination of tunnel, may be zero for transport mode.
304 * spi - zero to acquire spi. Not zero if spi is static, then
305 * daddr must be fixed too.
306 * proto - AH/ESP/IPCOMP
310 /* Source address of tunnel. Ignored, if it is not a tunnel. */
311 xfrm_address_t saddr
;
313 unsigned short encap_family
;
317 /* Mode: transport, tunnel etc. */
320 /* Sharing mode: unique, this session only, this user only etc. */
323 /* May skip this transfomration if no SA is found */
326 /* Bit mask of algos allowed for acquisition */
332 #define XFRM_MAX_DEPTH 6
336 struct xfrm_policy
*next
;
337 struct hlist_node bydst
;
338 struct hlist_node byidx
;
340 /* This lock only affects elements except for entry. */
343 struct timer_list timer
;
347 struct xfrm_selector selector
;
348 struct xfrm_lifetime_cfg lft
;
349 struct xfrm_lifetime_cur curlft
;
350 struct dst_entry
*bundles
;
357 /* XXX 1 byte hole, try to pack */
358 struct xfrm_sec_ctx
*security
;
359 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
362 #define XFRM_KM_TIMEOUT 30
364 #define XFRM_REPLAY_SEQ 1
365 #define XFRM_REPLAY_OSEQ 2
366 #define XFRM_REPLAY_SEQ_MASK 3
368 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
369 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
371 /* default aevent timeout in units of 100ms */
372 #define XFRM_AE_ETIME 10
373 /* Async Event timer multiplier */
374 #define XFRM_AE_ETH_M 10
375 /* default seq threshold size */
376 #define XFRM_AE_SEQT_SIZE 2
380 struct list_head list
;
382 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
383 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
384 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
385 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
386 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
387 int (*report
)(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
390 extern int xfrm_register_km(struct xfrm_mgr
*km
);
391 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
393 extern unsigned int xfrm_policy_count
[XFRM_POLICY_MAX
*2];
395 /* Audit Information */
402 #ifdef CONFIG_AUDITSYSCALL
403 extern void xfrm_audit_log(uid_t auid
, u32 secid
, int type
, int result
,
404 struct xfrm_policy
*xp
, struct xfrm_state
*x
);
406 #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0)
407 #endif /* CONFIG_AUDITSYSCALL */
409 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
411 if (likely(policy
!= NULL
))
412 atomic_inc(&policy
->refcnt
);
415 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
417 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
419 if (atomic_dec_and_test(&policy
->refcnt
))
420 __xfrm_policy_destroy(policy
);
423 #ifdef CONFIG_XFRM_SUB_POLICY
424 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
427 for (i
= npols
- 1; i
>= 0; --i
)
428 xfrm_pol_put(pols
[i
]);
431 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
433 xfrm_pol_put(pols
[0]);
437 extern void __xfrm_state_destroy(struct xfrm_state
*);
439 static inline void __xfrm_state_put(struct xfrm_state
*x
)
441 atomic_dec(&x
->refcnt
);
444 static inline void xfrm_state_put(struct xfrm_state
*x
)
446 if (atomic_dec_and_test(&x
->refcnt
))
447 __xfrm_state_destroy(x
);
450 static inline void xfrm_state_hold(struct xfrm_state
*x
)
452 atomic_inc(&x
->refcnt
);
455 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
462 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
463 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
466 if (memcmp(a1
, a2
, pdw
<< 2))
472 mask
= htonl((0xffffffff) << (32 - pbi
));
474 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
482 __be16
xfrm_flowi_sport(struct flowi
*fl
)
488 case IPPROTO_UDPLITE
:
490 port
= fl
->fl_ip_sport
;
494 port
= htons(fl
->fl_icmp_type
);
496 #ifdef CONFIG_IPV6_MIP6
498 port
= htons(fl
->fl_mh_type
);
508 __be16
xfrm_flowi_dport(struct flowi
*fl
)
514 case IPPROTO_UDPLITE
:
516 port
= fl
->fl_ip_dport
;
520 port
= htons(fl
->fl_icmp_code
);
528 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
529 unsigned short family
);
531 #ifdef CONFIG_SECURITY_NETWORK_XFRM
532 /* If neither has a context --> match
533 * Otherwise, both must have a context and the sids, doi, alg must match
535 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
537 return ((!s1
&& !s2
) ||
539 (s1
->ctx_sid
== s2
->ctx_sid
) &&
540 (s1
->ctx_doi
== s2
->ctx_doi
) &&
541 (s1
->ctx_alg
== s2
->ctx_alg
)));
544 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
550 /* A struct encoding bundle of transformations to apply to some set of flow.
552 * dst->child points to the next element of bundle.
553 * dst->xfrm points to an instanse of transformer.
555 * Due to unfortunate limitations of current routing cache, which we
556 * have no time to fix, it mirrors struct rtable and bound to the same
557 * routing key, including saddr,daddr. However, we can have many of
558 * bundles differing by session id. All the bundles grow from a parent
564 struct dst_entry dst
;
568 struct dst_entry
*route
;
570 u32 route_mtu_cached
;
571 u32 child_mtu_cached
;
576 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
578 dst_release(xdst
->route
);
579 if (likely(xdst
->u
.dst
.xfrm
))
580 xfrm_state_put(xdst
->u
.dst
.xfrm
);
583 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
589 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
592 static inline struct sec_path
*
593 secpath_get(struct sec_path
*sp
)
596 atomic_inc(&sp
->refcnt
);
600 extern void __secpath_destroy(struct sec_path
*sp
);
603 secpath_put(struct sec_path
*sp
)
605 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
606 __secpath_destroy(sp
);
609 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
612 secpath_reset(struct sk_buff
*skb
)
615 secpath_put(skb
->sp
);
621 xfrm_addr_any(xfrm_address_t
*addr
, unsigned short family
)
625 return addr
->a4
== 0;
627 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
633 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
635 return (tmpl
->saddr
.a4
&&
636 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
640 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
642 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
643 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
647 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
651 return __xfrm4_state_addr_cmp(tmpl
, x
);
653 return __xfrm6_state_addr_cmp(tmpl
, x
);
660 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
662 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
664 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
665 return __xfrm_policy_check(sk
, dir
, skb
, family
);
667 return (!xfrm_policy_count
[dir
] && !skb
->sp
) ||
668 (skb
->dst
->flags
& DST_NOPOLICY
) ||
669 __xfrm_policy_check(sk
, dir
, skb
, family
);
672 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
674 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
677 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
679 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
682 extern int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
, unsigned short family
);
683 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
685 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
687 return !xfrm_policy_count
[XFRM_POLICY_OUT
] ||
688 (skb
->dst
->flags
& DST_NOXFRM
) ||
689 __xfrm_route_forward(skb
, family
);
692 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
694 return xfrm_route_forward(skb
, AF_INET
);
697 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
699 return xfrm_route_forward(skb
, AF_INET6
);
702 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
704 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
706 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
707 return __xfrm_sk_clone_policy(sk
);
711 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
713 static inline void xfrm_sk_free_policy(struct sock
*sk
)
715 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
716 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
717 sk
->sk_policy
[0] = NULL
;
719 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
720 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
721 sk
->sk_policy
[1] = NULL
;
727 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
728 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
729 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
730 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
731 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
735 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
739 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
746 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
750 return (xfrm_address_t
*)&fl
->fl4_dst
;
752 return (xfrm_address_t
*)&fl
->fl6_dst
;
758 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
762 return (xfrm_address_t
*)&fl
->fl4_src
;
764 return (xfrm_address_t
*)&fl
->fl6_src
;
769 static __inline__
int
770 __xfrm4_state_addr_check(struct xfrm_state
*x
,
771 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
773 if (daddr
->a4
== x
->id
.daddr
.a4
&&
774 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
779 static __inline__
int
780 __xfrm6_state_addr_check(struct xfrm_state
*x
,
781 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
783 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
784 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
785 ipv6_addr_any((struct in6_addr
*)saddr
) ||
786 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
791 static __inline__
int
792 xfrm_state_addr_check(struct xfrm_state
*x
,
793 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
794 unsigned short family
)
798 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
800 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
805 static __inline__
int
806 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
807 unsigned short family
)
811 return __xfrm4_state_addr_check(x
,
812 (xfrm_address_t
*)&fl
->fl4_dst
,
813 (xfrm_address_t
*)&fl
->fl4_src
);
815 return __xfrm6_state_addr_check(x
,
816 (xfrm_address_t
*)&fl
->fl6_dst
,
817 (xfrm_address_t
*)&fl
->fl6_src
);
822 static inline int xfrm_state_kern(struct xfrm_state
*x
)
824 return atomic_read(&x
->tunnel_users
);
827 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
829 return (!userproto
|| proto
== userproto
||
830 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
831 proto
== IPPROTO_ESP
||
832 proto
== IPPROTO_COMP
)));
836 * xfrm algorithm information
838 struct xfrm_algo_auth_info
{
843 struct xfrm_algo_encr_info
{
848 struct xfrm_algo_comp_info
{
852 struct xfrm_algo_desc
{
857 struct xfrm_algo_auth_info auth
;
858 struct xfrm_algo_encr_info encr
;
859 struct xfrm_algo_comp_info comp
;
861 struct sadb_alg desc
;
864 /* XFRM tunnel handlers. */
866 int (*handler
)(struct sk_buff
*skb
);
867 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
869 struct xfrm_tunnel
*next
;
873 struct xfrm6_tunnel
{
874 int (*handler
)(struct sk_buff
*skb
);
875 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
876 int type
, int code
, int offset
, __be32 info
);
877 struct xfrm6_tunnel
*next
;
881 extern void xfrm_init(void);
882 extern void xfrm4_init(void);
883 extern void xfrm6_init(void);
884 extern void xfrm6_fini(void);
885 extern void xfrm_state_init(void);
886 extern void xfrm4_state_init(void);
887 extern void xfrm6_state_init(void);
888 extern void xfrm6_state_fini(void);
890 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
891 extern struct xfrm_state
*xfrm_state_alloc(void);
892 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
893 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
894 struct xfrm_policy
*pol
, int *err
,
895 unsigned short family
);
896 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
897 extern void xfrm_state_insert(struct xfrm_state
*x
);
898 extern int xfrm_state_add(struct xfrm_state
*x
);
899 extern int xfrm_state_update(struct xfrm_state
*x
);
900 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
901 extern struct xfrm_state
*xfrm_state_lookup_byaddr(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
902 #ifdef CONFIG_XFRM_SUB_POLICY
903 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
904 int n
, unsigned short family
);
905 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
906 int n
, unsigned short family
);
908 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
909 int n
, unsigned short family
)
914 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
915 int n
, unsigned short family
)
920 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
921 extern int xfrm_state_delete(struct xfrm_state
*x
);
922 extern void xfrm_state_flush(u8 proto
, struct xfrm_audit
*audit_info
);
923 extern int xfrm_replay_check(struct xfrm_state
*x
, __be32 seq
);
924 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
925 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
926 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
927 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
928 extern int xfrm_init_state(struct xfrm_state
*x
);
929 extern int xfrm4_rcv(struct sk_buff
*skb
);
930 extern int xfrm4_output(struct sk_buff
*skb
);
931 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
);
932 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
);
933 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, __be32 spi
);
934 extern int xfrm6_rcv(struct sk_buff
**pskb
);
935 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
936 xfrm_address_t
*saddr
, u8 proto
);
937 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
);
938 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
);
939 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
940 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
941 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
942 extern int xfrm6_output(struct sk_buff
*skb
);
943 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
947 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
948 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
949 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
951 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
956 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
958 /* should not happen */
962 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
968 struct xfrm_policy
*xfrm_policy_alloc(gfp_t gfp
);
969 extern int xfrm_policy_walk(u8 type
, int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
970 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
971 struct xfrm_policy
*xfrm_policy_bysel_ctx(u8 type
, int dir
,
972 struct xfrm_selector
*sel
,
973 struct xfrm_sec_ctx
*ctx
, int delete);
974 struct xfrm_policy
*xfrm_policy_byid(u8
, int dir
, u32 id
, int delete);
975 void xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
976 u32
xfrm_get_acqseq(void);
977 void xfrm_alloc_spi(struct xfrm_state
*x
, __be32 minspi
, __be32 maxspi
);
978 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
979 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
980 int create
, unsigned short family
);
981 extern void xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
982 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
983 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
984 struct flowi
*fl
, int family
, int strict
);
985 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
987 extern wait_queue_head_t km_waitq
;
988 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
989 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
990 extern int km_report(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
992 extern void xfrm_input_init(void);
993 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
995 extern void xfrm_probe_algs(void);
996 extern int xfrm_count_auth_supported(void);
997 extern int xfrm_count_enc_supported(void);
998 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
999 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1000 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1001 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1002 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1003 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1004 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1005 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1009 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1012 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1013 int offset
, int len
, icv_update_fn_t icv_update
);
1015 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1021 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1023 return ipv6_addr_cmp((struct in6_addr
*)a
,
1024 (struct in6_addr
*)b
);
1028 static inline int xfrm_policy_id2dir(u32 index
)
1033 static inline int xfrm_aevent_is_on(void)
1039 nlsk
= rcu_dereference(xfrm_nl
);
1041 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1046 static inline void xfrm_aevent_doreplay(struct xfrm_state
*x
)
1048 if (xfrm_aevent_is_on())
1049 xfrm_replay_notify(x
, XFRM_REPLAY_UPDATE
);
1053 #endif /* _NET_XFRM_H */