4 #include <linux/compiler.h>
5 #include <linux/xfrm.h>
6 #include <linux/spinlock.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
9 #include <linux/netdevice.h>
10 #include <linux/crypto.h>
11 #include <linux/pfkeyv2.h>
12 #include <linux/in6.h>
16 #include <net/route.h>
18 #include <net/ip6_fib.h>
20 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
22 extern struct semaphore xfrm_cfg_sem
;
24 /* Organization of SPD aka "XFRM rules"
25 ------------------------------------
28 - policy rule, struct xfrm_policy (=SPD entry)
29 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
30 - instance of a transformer, struct xfrm_state (=SA)
31 - template to clone xfrm_state, struct xfrm_tmpl
33 SPD is plain linear list of xfrm_policy rules, ordered by priority.
34 (To be compatible with existing pfkeyv2 implementations,
35 many rules with priority of 0x7fffffff are allowed to exist and
36 such rules are ordered in an unpredictable way, thanks to bsd folks.)
38 Lookup is plain linear search until the first match with selector.
40 If "action" is "block", then we prohibit the flow, otherwise:
41 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
42 policy entry has list of up to XFRM_MAX_DEPTH transformations,
43 described by templates xfrm_tmpl. Each template is resolved
44 to a complete xfrm_state (see below) and we pack bundle of transformations
45 to a dst_entry returned to requestor.
47 dst -. xfrm .-> xfrm_state #1
48 |---. child .-> dst -. xfrm .-> xfrm_state #2
49 |---. child .-> dst -. xfrm .-> xfrm_state #3
52 Bundles are cached at xrfm_policy struct (field ->bundles).
55 Resolution of xrfm_tmpl
56 -----------------------
58 1. ->mode Mode: transport or tunnel
59 2. ->id.proto Protocol: AH/ESP/IPCOMP
60 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
61 Q: allow to resolve security gateway?
62 4. ->id.spi If not zero, static SPI.
63 5. ->saddr Local tunnel endpoint, ignored for transport mode.
64 6. ->algos List of allowed algos. Plain bitmask now.
65 Q: ealgos, aalgos, calgos. What a mess...
66 7. ->share Sharing mode.
67 Q: how to implement private sharing mode? To add struct sock* to
70 Having this template we search through SAD searching for entries
71 with appropriate mode/proto/algo, permitted by selector.
72 If no appropriate entry found, it is requested from key manager.
75 Q: How to find all the bundles referring to a physical path for
76 PMTU discovery? Seems, dst should contain list of all parents...
77 and enter to infinite locking hierarchy disaster.
78 No! It is easier, we will not search for them, let them find us.
79 We add genid to each dst plus pointer to genid of raw IP route,
80 pmtu disc will update pmtu on raw IP route and increase its genid.
81 dst_check() will see this for top level and trigger resyncing
82 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
85 /* Full description of state of transformer. */
88 /* Note: bydst is re-used during gc */
89 struct list_head bydst
;
90 struct list_head byspi
;
96 struct xfrm_selector sel
;
105 /* Parameters of this state. */
110 u8 aalgo
, ealgo
, calgo
;
113 xfrm_address_t saddr
;
118 struct xfrm_lifetime_cfg lft
;
120 /* Data for transformer */
121 struct xfrm_algo
*aalg
;
122 struct xfrm_algo
*ealg
;
123 struct xfrm_algo
*calg
;
125 /* Data for encapsulator */
126 struct xfrm_encap_tmpl
*encap
;
128 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
129 struct xfrm_state
*tunnel
;
131 /* If a tunnel, number of users + 1 */
132 atomic_t tunnel_users
;
134 /* State for replay detection */
135 struct xfrm_replay_state replay
;
138 struct xfrm_stats stats
;
140 struct xfrm_lifetime_cur curlft
;
141 struct timer_list timer
;
143 /* Reference to data common to all the instances of this
145 struct xfrm_type
*type
;
147 /* Private data of this transformer, format is opaque,
148 * interpreted by xfrm_type methods. */
161 /* events that could be sent by kernel */
171 #define XFRM_SAP_MAX (__XFRM_SAP_MAX - 1)
173 /* callback structure passed from either netlink or pfkey */
184 struct xfrm_policy_afinfo
{
185 unsigned short family
;
187 struct xfrm_type_map
*type_map
;
188 struct dst_ops
*dst_ops
;
189 void (*garbage_collect
)(void);
190 int (*dst_lookup
)(struct xfrm_dst
**dst
, struct flowi
*fl
);
191 struct dst_entry
*(*find_bundle
)(struct flowi
*fl
, struct xfrm_policy
*policy
);
192 int (*bundle_create
)(struct xfrm_policy
*policy
,
193 struct xfrm_state
**xfrm
,
196 struct dst_entry
**dst_p
);
197 void (*decode_session
)(struct sk_buff
*skb
,
201 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
202 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
203 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
204 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
206 #define XFRM_ACQ_EXPIRES 30
209 struct xfrm_state_afinfo
{
210 unsigned short family
;
212 struct list_head
*state_bydst
;
213 struct list_head
*state_byspi
;
214 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
215 struct xfrm_tmpl
*tmpl
,
216 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
217 struct xfrm_state
*(*state_lookup
)(xfrm_address_t
*daddr
, u32 spi
, u8 proto
);
218 struct xfrm_state
*(*find_acq
)(u8 mode
, u32 reqid
, u8 proto
,
219 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
223 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
224 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
226 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
228 struct xfrm_decap_state
;
232 struct module
*owner
;
235 int (*init_state
)(struct xfrm_state
*x
, void *args
);
236 void (*destructor
)(struct xfrm_state
*);
237 int (*input
)(struct xfrm_state
*, struct xfrm_decap_state
*, struct sk_buff
*skb
);
238 int (*post_input
)(struct xfrm_state
*, struct xfrm_decap_state
*, struct sk_buff
*skb
);
239 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
240 /* Estimate maximal size of result of transformation of a dgram */
241 u32 (*get_max_size
)(struct xfrm_state
*, int size
);
244 struct xfrm_type_map
{
246 struct xfrm_type
*map
[256];
249 extern int xfrm_register_type(struct xfrm_type
*type
, unsigned short family
);
250 extern int xfrm_unregister_type(struct xfrm_type
*type
, unsigned short family
);
251 extern struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
);
252 extern void xfrm_put_type(struct xfrm_type
*type
);
256 /* id in template is interpreted as:
257 * daddr - destination of tunnel, may be zero for transport mode.
258 * spi - zero to acquire spi. Not zero if spi is static, then
259 * daddr must be fixed too.
260 * proto - AH/ESP/IPCOMP
264 /* Source address of tunnel. Ignored, if it is not a tunnel. */
265 xfrm_address_t saddr
;
269 /* Mode: transport/tunnel */
272 /* Sharing mode: unique, this session only, this user only etc. */
275 /* May skip this transfomration if no SA is found */
278 /* Bit mask of algos allowed for acquisition */
284 #define XFRM_MAX_DEPTH 4
288 struct xfrm_policy
*next
;
289 struct list_head list
;
291 /* This lock only affects elements except for entry. */
294 struct timer_list timer
;
298 struct xfrm_selector selector
;
299 struct xfrm_lifetime_cfg lft
;
300 struct xfrm_lifetime_cur curlft
;
301 struct dst_entry
*bundles
;
307 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
310 #define XFRM_KM_TIMEOUT 30
314 struct list_head list
;
316 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
317 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
318 struct xfrm_policy
*(*compile_policy
)(u16 family
, int opt
, u8
*data
, int len
, int *dir
);
319 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, u16 sport
);
320 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
323 extern int xfrm_register_km(struct xfrm_mgr
*km
);
324 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
327 extern struct xfrm_policy
*xfrm_policy_list
[XFRM_POLICY_MAX
*2];
329 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
331 if (likely(policy
!= NULL
))
332 atomic_inc(&policy
->refcnt
);
335 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
337 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
339 if (atomic_dec_and_test(&policy
->refcnt
))
340 __xfrm_policy_destroy(policy
);
343 #define XFRM_DST_HSIZE 1024
346 unsigned __xfrm4_dst_hash(xfrm_address_t
*addr
)
350 h
= (h
^ (h
>>16)) % XFRM_DST_HSIZE
;
355 unsigned __xfrm6_dst_hash(xfrm_address_t
*addr
)
358 h
= ntohl(addr
->a6
[2]^addr
->a6
[3]);
359 h
= (h
^ (h
>>16)) % XFRM_DST_HSIZE
;
364 unsigned xfrm_dst_hash(xfrm_address_t
*addr
, unsigned short family
)
368 return __xfrm4_dst_hash(addr
);
370 return __xfrm6_dst_hash(addr
);
376 unsigned __xfrm4_spi_hash(xfrm_address_t
*addr
, u32 spi
, u8 proto
)
379 h
= ntohl(addr
->a4
^spi
^proto
);
380 h
= (h
^ (h
>>10) ^ (h
>>20)) % XFRM_DST_HSIZE
;
385 unsigned __xfrm6_spi_hash(xfrm_address_t
*addr
, u32 spi
, u8 proto
)
388 h
= ntohl(addr
->a6
[2]^addr
->a6
[3]^spi
^proto
);
389 h
= (h
^ (h
>>10) ^ (h
>>20)) % XFRM_DST_HSIZE
;
394 unsigned xfrm_spi_hash(xfrm_address_t
*addr
, u32 spi
, u8 proto
, unsigned short family
)
398 return __xfrm4_spi_hash(addr
, spi
, proto
);
400 return __xfrm6_spi_hash(addr
, spi
, proto
);
405 extern void __xfrm_state_destroy(struct xfrm_state
*);
407 static inline void xfrm_state_put(struct xfrm_state
*x
)
409 if (atomic_dec_and_test(&x
->refcnt
))
410 __xfrm_state_destroy(x
);
413 static inline void xfrm_state_hold(struct xfrm_state
*x
)
415 atomic_inc(&x
->refcnt
);
418 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
425 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
426 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
429 if (memcmp(a1
, a2
, pdw
<< 2))
435 mask
= htonl((0xffffffff) << (32 - pbi
));
437 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
445 u16
xfrm_flowi_sport(struct flowi
*fl
)
452 port
= fl
->fl_ip_sport
;
456 port
= htons(fl
->fl_icmp_type
);
465 u16
xfrm_flowi_dport(struct flowi
*fl
)
472 port
= fl
->fl_ip_dport
;
476 port
= htons(fl
->fl_icmp_code
);
485 __xfrm4_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
)
487 return addr_match(&fl
->fl4_dst
, &sel
->daddr
, sel
->prefixlen_d
) &&
488 addr_match(&fl
->fl4_src
, &sel
->saddr
, sel
->prefixlen_s
) &&
489 !((xfrm_flowi_dport(fl
) ^ sel
->dport
) & sel
->dport_mask
) &&
490 !((xfrm_flowi_sport(fl
) ^ sel
->sport
) & sel
->sport_mask
) &&
491 (fl
->proto
== sel
->proto
|| !sel
->proto
) &&
492 (fl
->oif
== sel
->ifindex
|| !sel
->ifindex
);
496 __xfrm6_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
)
498 return addr_match(&fl
->fl6_dst
, &sel
->daddr
, sel
->prefixlen_d
) &&
499 addr_match(&fl
->fl6_src
, &sel
->saddr
, sel
->prefixlen_s
) &&
500 !((xfrm_flowi_dport(fl
) ^ sel
->dport
) & sel
->dport_mask
) &&
501 !((xfrm_flowi_sport(fl
) ^ sel
->sport
) & sel
->sport_mask
) &&
502 (fl
->proto
== sel
->proto
|| !sel
->proto
) &&
503 (fl
->oif
== sel
->ifindex
|| !sel
->ifindex
);
507 xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
508 unsigned short family
)
512 return __xfrm4_selector_match(sel
, fl
);
514 return __xfrm6_selector_match(sel
, fl
);
519 /* A struct encoding bundle of transformations to apply to some set of flow.
521 * dst->child points to the next element of bundle.
522 * dst->xfrm points to an instanse of transformer.
524 * Due to unfortunate limitations of current routing cache, which we
525 * have no time to fix, it mirrors struct rtable and bound to the same
526 * routing key, including saddr,daddr. However, we can have many of
527 * bundles differing by session id. All the bundles grow from a parent
533 struct xfrm_dst
*next
;
534 struct dst_entry dst
;
538 struct dst_entry
*route
;
539 u32 route_mtu_cached
;
540 u32 child_mtu_cached
;
545 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
547 dst_release(xdst
->route
);
548 if (likely(xdst
->u
.dst
.xfrm
))
549 xfrm_state_put(xdst
->u
.dst
.xfrm
);
552 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
554 /* Decapsulation state, used by the input to store data during
555 * decapsulation procedure, to be used later (during the policy
558 struct xfrm_decap_state
{
563 struct sec_decap_state
{
564 struct xfrm_state
*xvec
;
565 struct xfrm_decap_state decap
;
572 struct sec_decap_state x
[XFRM_MAX_DEPTH
];
575 static inline struct sec_path
*
576 secpath_get(struct sec_path
*sp
)
579 atomic_inc(&sp
->refcnt
);
583 extern void __secpath_destroy(struct sec_path
*sp
);
586 secpath_put(struct sec_path
*sp
)
588 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
589 __secpath_destroy(sp
);
592 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
595 secpath_reset(struct sk_buff
*skb
)
598 secpath_put(skb
->sp
);
604 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
606 return (tmpl
->saddr
.a4
&&
607 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
611 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
613 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
614 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
618 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
622 return __xfrm4_state_addr_cmp(tmpl
, x
);
624 return __xfrm6_state_addr_cmp(tmpl
, x
);
631 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
633 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
635 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
636 return __xfrm_policy_check(sk
, dir
, skb
, family
);
638 return (!xfrm_policy_list
[dir
] && !skb
->sp
) ||
639 (skb
->dst
->flags
& DST_NOPOLICY
) ||
640 __xfrm_policy_check(sk
, dir
, skb
, family
);
643 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
645 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
648 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
650 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
654 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
656 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
658 return !xfrm_policy_list
[XFRM_POLICY_OUT
] ||
659 (skb
->dst
->flags
& DST_NOXFRM
) ||
660 __xfrm_route_forward(skb
, family
);
663 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
665 return xfrm_route_forward(skb
, AF_INET
);
668 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
670 return xfrm_route_forward(skb
, AF_INET6
);
673 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
675 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
677 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
678 return __xfrm_sk_clone_policy(sk
);
682 extern void xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
684 static inline void xfrm_sk_free_policy(struct sock
*sk
)
686 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
687 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
688 sk
->sk_policy
[0] = NULL
;
690 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
691 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
692 sk
->sk_policy
[1] = NULL
;
698 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
699 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
700 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
701 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
702 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
706 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
710 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
717 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
721 return (xfrm_address_t
*)&fl
->fl4_dst
;
723 return (xfrm_address_t
*)&fl
->fl6_dst
;
729 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
733 return (xfrm_address_t
*)&fl
->fl4_src
;
735 return (xfrm_address_t
*)&fl
->fl6_src
;
740 static __inline__
int
741 __xfrm4_state_addr_check(struct xfrm_state
*x
,
742 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
744 if (daddr
->a4
== x
->id
.daddr
.a4
&&
745 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
750 static __inline__
int
751 __xfrm6_state_addr_check(struct xfrm_state
*x
,
752 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
754 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
755 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
756 ipv6_addr_any((struct in6_addr
*)saddr
) ||
757 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
762 static __inline__
int
763 xfrm_state_addr_check(struct xfrm_state
*x
,
764 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
765 unsigned short family
)
769 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
771 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
776 static inline int xfrm_state_kern(struct xfrm_state
*x
)
778 return atomic_read(&x
->tunnel_users
);
782 * xfrm algorithm information
784 struct xfrm_algo_auth_info
{
789 struct xfrm_algo_encr_info
{
794 struct xfrm_algo_comp_info
{
798 struct xfrm_algo_desc
{
802 struct xfrm_algo_auth_info auth
;
803 struct xfrm_algo_encr_info encr
;
804 struct xfrm_algo_comp_info comp
;
806 struct sadb_alg desc
;
809 /* XFRM tunnel handlers. */
811 int (*handler
)(struct sk_buff
*skb
);
812 void (*err_handler
)(struct sk_buff
*skb
, void *info
);
815 struct xfrm6_tunnel
{
816 int (*handler
)(struct sk_buff
**pskb
, unsigned int *nhoffp
);
817 void (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
818 int type
, int code
, int offset
, __u32 info
);
821 extern void xfrm_init(void);
822 extern void xfrm4_init(void);
823 extern void xfrm6_init(void);
824 extern void xfrm6_fini(void);
825 extern void xfrm_state_init(void);
826 extern void xfrm4_state_init(void);
827 extern void xfrm4_state_fini(void);
828 extern void xfrm6_state_init(void);
829 extern void xfrm6_state_fini(void);
831 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
832 extern struct xfrm_state
*xfrm_state_alloc(void);
833 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
834 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
835 struct xfrm_policy
*pol
, int *err
,
836 unsigned short family
);
837 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
838 extern void xfrm_state_insert(struct xfrm_state
*x
);
839 extern int xfrm_state_add(struct xfrm_state
*x
);
840 extern int xfrm_state_update(struct xfrm_state
*x
);
841 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, u32 spi
, u8 proto
, unsigned short family
);
842 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
843 extern int xfrm_state_delete(struct xfrm_state
*x
);
844 extern void xfrm_state_flush(u8 proto
);
845 extern int xfrm_replay_check(struct xfrm_state
*x
, u32 seq
);
846 extern void xfrm_replay_advance(struct xfrm_state
*x
, u32 seq
);
847 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
848 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
849 extern int xfrm4_rcv(struct sk_buff
*skb
);
850 extern int xfrm4_output(struct sk_buff
*skb
);
851 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
);
852 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
);
853 extern int xfrm6_rcv_spi(struct sk_buff
**pskb
, unsigned int *nhoffp
, u32 spi
);
854 extern int xfrm6_rcv(struct sk_buff
**pskb
, unsigned int *nhoffp
);
855 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
);
856 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
);
857 extern u32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
858 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
859 extern u32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
860 extern int xfrm6_output(struct sk_buff
*skb
);
863 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
864 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
865 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
867 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
872 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
874 /* should not happen */
878 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
884 struct xfrm_policy
*xfrm_policy_alloc(int gfp
);
885 extern int xfrm_policy_walk(int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
886 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
887 struct xfrm_policy
*xfrm_policy_bysel(int dir
, struct xfrm_selector
*sel
,
889 struct xfrm_policy
*xfrm_policy_byid(int dir
, u32 id
, int delete);
890 void xfrm_policy_flush(void);
891 u32
xfrm_get_acqseq(void);
892 void xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
893 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
894 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
895 int create
, unsigned short family
);
896 extern void xfrm_policy_flush(void);
897 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
898 extern int xfrm_flush_bundles(void);
899 extern int xfrm_bundle_ok(struct xfrm_dst
*xdst
, struct flowi
*fl
, int family
);
900 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
902 extern wait_queue_head_t km_waitq
;
903 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, u16 sport
);
904 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
);
906 extern void xfrm_input_init(void);
907 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, u32
*spi
, u32
*seq
);
909 extern void xfrm_probe_algs(void);
910 extern int xfrm_count_auth_supported(void);
911 extern int xfrm_count_enc_supported(void);
912 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
913 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
914 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
915 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
916 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
917 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
918 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
919 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
922 typedef void (icv_update_fn_t
)(struct crypto_tfm
*, struct scatterlist
*, unsigned int);
924 extern void skb_icv_walk(const struct sk_buff
*skb
, struct crypto_tfm
*tfm
,
925 int offset
, int len
, icv_update_fn_t icv_update
);
927 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
933 return a
->a4
- b
->a4
;
935 return ipv6_addr_cmp((struct in6_addr
*)a
,
936 (struct in6_addr
*)b
);
940 #endif /* _NET_XFRM_H */