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/crypto.h>
12 #include <linux/pfkeyv2.h>
13 #include <linux/in6.h>
17 #include <net/route.h>
19 #include <net/ip6_fib.h>
21 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
23 extern struct semaphore xfrm_cfg_sem
;
25 /* Organization of SPD aka "XFRM rules"
26 ------------------------------------
29 - policy rule, struct xfrm_policy (=SPD entry)
30 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
31 - instance of a transformer, struct xfrm_state (=SA)
32 - template to clone xfrm_state, struct xfrm_tmpl
34 SPD is plain linear list of xfrm_policy rules, ordered by priority.
35 (To be compatible with existing pfkeyv2 implementations,
36 many rules with priority of 0x7fffffff are allowed to exist and
37 such rules are ordered in an unpredictable way, thanks to bsd folks.)
39 Lookup is plain linear search until the first match with selector.
41 If "action" is "block", then we prohibit the flow, otherwise:
42 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
43 policy entry has list of up to XFRM_MAX_DEPTH transformations,
44 described by templates xfrm_tmpl. Each template is resolved
45 to a complete xfrm_state (see below) and we pack bundle of transformations
46 to a dst_entry returned to requestor.
48 dst -. xfrm .-> xfrm_state #1
49 |---. child .-> dst -. xfrm .-> xfrm_state #2
50 |---. child .-> dst -. xfrm .-> xfrm_state #3
53 Bundles are cached at xrfm_policy struct (field ->bundles).
56 Resolution of xrfm_tmpl
57 -----------------------
59 1. ->mode Mode: transport or tunnel
60 2. ->id.proto Protocol: AH/ESP/IPCOMP
61 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
62 Q: allow to resolve security gateway?
63 4. ->id.spi If not zero, static SPI.
64 5. ->saddr Local tunnel endpoint, ignored for transport mode.
65 6. ->algos List of allowed algos. Plain bitmask now.
66 Q: ealgos, aalgos, calgos. What a mess...
67 7. ->share Sharing mode.
68 Q: how to implement private sharing mode? To add struct sock* to
71 Having this template we search through SAD searching for entries
72 with appropriate mode/proto/algo, permitted by selector.
73 If no appropriate entry found, it is requested from key manager.
76 Q: How to find all the bundles referring to a physical path for
77 PMTU discovery? Seems, dst should contain list of all parents...
78 and enter to infinite locking hierarchy disaster.
79 No! It is easier, we will not search for them, let them find us.
80 We add genid to each dst plus pointer to genid of raw IP route,
81 pmtu disc will update pmtu on raw IP route and increase its genid.
82 dst_check() will see this for top level and trigger resyncing
83 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
86 /* Full description of state of transformer. */
89 /* Note: bydst is re-used during gc */
90 struct list_head bydst
;
91 struct list_head byspi
;
97 struct xfrm_selector sel
;
106 /* Parameters of this state. */
111 u8 aalgo
, ealgo
, calgo
;
114 xfrm_address_t saddr
;
119 struct xfrm_lifetime_cfg lft
;
121 /* Data for transformer */
122 struct xfrm_algo
*aalg
;
123 struct xfrm_algo
*ealg
;
124 struct xfrm_algo
*calg
;
126 /* Data for encapsulator */
127 struct xfrm_encap_tmpl
*encap
;
129 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
130 struct xfrm_state
*tunnel
;
132 /* If a tunnel, number of users + 1 */
133 atomic_t tunnel_users
;
135 /* State for replay detection */
136 struct xfrm_replay_state replay
;
139 struct xfrm_stats stats
;
141 struct xfrm_lifetime_cur curlft
;
142 struct timer_list timer
;
144 /* Reference to data common to all the instances of this
146 struct xfrm_type
*type
;
148 /* Security context */
149 struct xfrm_sec_ctx
*security
;
151 /* Private data of this transformer, format is opaque,
152 * interpreted by xfrm_type methods. */
165 /* callback structure passed from either netlink or pfkey */
181 struct xfrm_policy_afinfo
{
182 unsigned short family
;
184 struct xfrm_type_map
*type_map
;
185 struct dst_ops
*dst_ops
;
186 void (*garbage_collect
)(void);
187 int (*dst_lookup
)(struct xfrm_dst
**dst
, struct flowi
*fl
);
188 struct dst_entry
*(*find_bundle
)(struct flowi
*fl
, struct xfrm_policy
*policy
);
189 int (*bundle_create
)(struct xfrm_policy
*policy
,
190 struct xfrm_state
**xfrm
,
193 struct dst_entry
**dst_p
);
194 void (*decode_session
)(struct sk_buff
*skb
,
198 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
199 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
200 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
201 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
203 #define XFRM_ACQ_EXPIRES 30
206 struct xfrm_state_afinfo
{
207 unsigned short family
;
209 struct list_head
*state_bydst
;
210 struct list_head
*state_byspi
;
211 int (*init_flags
)(struct xfrm_state
*x
);
212 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
213 struct xfrm_tmpl
*tmpl
,
214 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
215 struct xfrm_state
*(*state_lookup
)(xfrm_address_t
*daddr
, u32 spi
, u8 proto
);
216 struct xfrm_state
*(*find_acq
)(u8 mode
, u32 reqid
, u8 proto
,
217 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
221 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
222 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
224 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
226 struct xfrm_decap_state
;
230 struct module
*owner
;
233 int (*init_state
)(struct xfrm_state
*x
);
234 void (*destructor
)(struct xfrm_state
*);
235 int (*input
)(struct xfrm_state
*, struct xfrm_decap_state
*, struct sk_buff
*skb
);
236 int (*post_input
)(struct xfrm_state
*, struct xfrm_decap_state
*, struct sk_buff
*skb
);
237 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
238 /* Estimate maximal size of result of transformation of a dgram */
239 u32 (*get_max_size
)(struct xfrm_state
*, int size
);
242 struct xfrm_type_map
{
244 struct xfrm_type
*map
[256];
247 extern int xfrm_register_type(struct xfrm_type
*type
, unsigned short family
);
248 extern int xfrm_unregister_type(struct xfrm_type
*type
, unsigned short family
);
249 extern struct xfrm_type
*xfrm_get_type(u8 proto
, unsigned short family
);
250 extern void xfrm_put_type(struct xfrm_type
*type
);
254 /* id in template is interpreted as:
255 * daddr - destination of tunnel, may be zero for transport mode.
256 * spi - zero to acquire spi. Not zero if spi is static, then
257 * daddr must be fixed too.
258 * proto - AH/ESP/IPCOMP
262 /* Source address of tunnel. Ignored, if it is not a tunnel. */
263 xfrm_address_t saddr
;
267 /* Mode: transport/tunnel */
270 /* Sharing mode: unique, this session only, this user only etc. */
273 /* May skip this transfomration if no SA is found */
276 /* Bit mask of algos allowed for acquisition */
282 #define XFRM_MAX_DEPTH 4
286 struct xfrm_policy
*next
;
287 struct list_head list
;
289 /* This lock only affects elements except for entry. */
292 struct timer_list timer
;
296 struct xfrm_selector selector
;
297 struct xfrm_lifetime_cfg lft
;
298 struct xfrm_lifetime_cur curlft
;
299 struct dst_entry
*bundles
;
305 struct xfrm_sec_ctx
*security
;
306 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
309 #define XFRM_KM_TIMEOUT 30
313 struct list_head list
;
315 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
316 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
317 struct xfrm_policy
*(*compile_policy
)(u16 family
, int opt
, u8
*data
, int len
, int *dir
);
318 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, u16 sport
);
319 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
322 extern int xfrm_register_km(struct xfrm_mgr
*km
);
323 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
326 extern struct xfrm_policy
*xfrm_policy_list
[XFRM_POLICY_MAX
*2];
328 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
330 if (likely(policy
!= NULL
))
331 atomic_inc(&policy
->refcnt
);
334 extern void __xfrm_policy_destroy(struct xfrm_policy
*policy
);
336 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
338 if (atomic_dec_and_test(&policy
->refcnt
))
339 __xfrm_policy_destroy(policy
);
342 #define XFRM_DST_HSIZE 1024
345 unsigned __xfrm4_dst_hash(xfrm_address_t
*addr
)
349 h
= (h
^ (h
>>16)) % XFRM_DST_HSIZE
;
354 unsigned __xfrm6_dst_hash(xfrm_address_t
*addr
)
357 h
= ntohl(addr
->a6
[2]^addr
->a6
[3]);
358 h
= (h
^ (h
>>16)) % XFRM_DST_HSIZE
;
363 unsigned xfrm_dst_hash(xfrm_address_t
*addr
, unsigned short family
)
367 return __xfrm4_dst_hash(addr
);
369 return __xfrm6_dst_hash(addr
);
375 unsigned __xfrm4_spi_hash(xfrm_address_t
*addr
, u32 spi
, u8 proto
)
378 h
= ntohl(addr
->a4
^spi
^proto
);
379 h
= (h
^ (h
>>10) ^ (h
>>20)) % XFRM_DST_HSIZE
;
384 unsigned __xfrm6_spi_hash(xfrm_address_t
*addr
, u32 spi
, u8 proto
)
387 h
= ntohl(addr
->a6
[2]^addr
->a6
[3]^spi
^proto
);
388 h
= (h
^ (h
>>10) ^ (h
>>20)) % XFRM_DST_HSIZE
;
393 unsigned xfrm_spi_hash(xfrm_address_t
*addr
, u32 spi
, u8 proto
, unsigned short family
)
397 return __xfrm4_spi_hash(addr
, spi
, proto
);
399 return __xfrm6_spi_hash(addr
, spi
, proto
);
404 extern void __xfrm_state_destroy(struct xfrm_state
*);
406 static inline void xfrm_state_put(struct xfrm_state
*x
)
408 if (atomic_dec_and_test(&x
->refcnt
))
409 __xfrm_state_destroy(x
);
412 static inline void xfrm_state_hold(struct xfrm_state
*x
)
414 atomic_inc(&x
->refcnt
);
417 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
424 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
425 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
428 if (memcmp(a1
, a2
, pdw
<< 2))
434 mask
= htonl((0xffffffff) << (32 - pbi
));
436 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
444 u16
xfrm_flowi_sport(struct flowi
*fl
)
451 port
= fl
->fl_ip_sport
;
455 port
= htons(fl
->fl_icmp_type
);
464 u16
xfrm_flowi_dport(struct flowi
*fl
)
471 port
= fl
->fl_ip_dport
;
475 port
= htons(fl
->fl_icmp_code
);
484 __xfrm4_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
)
486 return addr_match(&fl
->fl4_dst
, &sel
->daddr
, sel
->prefixlen_d
) &&
487 addr_match(&fl
->fl4_src
, &sel
->saddr
, sel
->prefixlen_s
) &&
488 !((xfrm_flowi_dport(fl
) ^ sel
->dport
) & sel
->dport_mask
) &&
489 !((xfrm_flowi_sport(fl
) ^ sel
->sport
) & sel
->sport_mask
) &&
490 (fl
->proto
== sel
->proto
|| !sel
->proto
) &&
491 (fl
->oif
== sel
->ifindex
|| !sel
->ifindex
);
495 __xfrm6_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
)
497 return addr_match(&fl
->fl6_dst
, &sel
->daddr
, sel
->prefixlen_d
) &&
498 addr_match(&fl
->fl6_src
, &sel
->saddr
, sel
->prefixlen_s
) &&
499 !((xfrm_flowi_dport(fl
) ^ sel
->dport
) & sel
->dport_mask
) &&
500 !((xfrm_flowi_sport(fl
) ^ sel
->sport
) & sel
->sport_mask
) &&
501 (fl
->proto
== sel
->proto
|| !sel
->proto
) &&
502 (fl
->oif
== sel
->ifindex
|| !sel
->ifindex
);
506 xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
507 unsigned short family
)
511 return __xfrm4_selector_match(sel
, fl
);
513 return __xfrm6_selector_match(sel
, fl
);
518 #ifdef CONFIG_SECURITY_NETWORK_XFRM
519 /* If neither has a context --> match
520 * Otherwise, both must have a context and the sids, doi, alg must match
522 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
524 return ((!s1
&& !s2
) ||
526 (s1
->ctx_sid
== s2
->ctx_sid
) &&
527 (s1
->ctx_doi
== s2
->ctx_doi
) &&
528 (s1
->ctx_alg
== s2
->ctx_alg
)));
531 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
537 /* A struct encoding bundle of transformations to apply to some set of flow.
539 * dst->child points to the next element of bundle.
540 * dst->xfrm points to an instanse of transformer.
542 * Due to unfortunate limitations of current routing cache, which we
543 * have no time to fix, it mirrors struct rtable and bound to the same
544 * routing key, including saddr,daddr. However, we can have many of
545 * bundles differing by session id. All the bundles grow from a parent
551 struct xfrm_dst
*next
;
552 struct dst_entry dst
;
556 struct dst_entry
*route
;
557 u32 route_mtu_cached
;
558 u32 child_mtu_cached
;
563 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
565 dst_release(xdst
->route
);
566 if (likely(xdst
->u
.dst
.xfrm
))
567 xfrm_state_put(xdst
->u
.dst
.xfrm
);
570 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
572 /* Decapsulation state, used by the input to store data during
573 * decapsulation procedure, to be used later (during the policy
576 struct xfrm_decap_state
{
581 struct sec_decap_state
{
582 struct xfrm_state
*xvec
;
583 struct xfrm_decap_state decap
;
590 struct sec_decap_state x
[XFRM_MAX_DEPTH
];
593 static inline struct sec_path
*
594 secpath_get(struct sec_path
*sp
)
597 atomic_inc(&sp
->refcnt
);
601 extern void __secpath_destroy(struct sec_path
*sp
);
604 secpath_put(struct sec_path
*sp
)
606 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
607 __secpath_destroy(sp
);
610 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
613 secpath_reset(struct sk_buff
*skb
)
616 secpath_put(skb
->sp
);
622 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
624 return (tmpl
->saddr
.a4
&&
625 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
629 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
631 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
632 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
636 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
640 return __xfrm4_state_addr_cmp(tmpl
, x
);
642 return __xfrm6_state_addr_cmp(tmpl
, x
);
649 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
651 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
653 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
654 return __xfrm_policy_check(sk
, dir
, skb
, family
);
656 return (!xfrm_policy_list
[dir
] && !skb
->sp
) ||
657 (skb
->dst
->flags
& DST_NOPOLICY
) ||
658 __xfrm_policy_check(sk
, dir
, skb
, family
);
661 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
663 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
666 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
668 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
671 extern int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
, unsigned short family
);
672 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
674 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
676 return !xfrm_policy_list
[XFRM_POLICY_OUT
] ||
677 (skb
->dst
->flags
& DST_NOXFRM
) ||
678 __xfrm_route_forward(skb
, family
);
681 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
683 return xfrm_route_forward(skb
, AF_INET
);
686 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
688 return xfrm_route_forward(skb
, AF_INET6
);
691 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
693 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
695 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
696 return __xfrm_sk_clone_policy(sk
);
700 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
702 static inline void xfrm_sk_free_policy(struct sock
*sk
)
704 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
705 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
706 sk
->sk_policy
[0] = NULL
;
708 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
709 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
710 sk
->sk_policy
[1] = NULL
;
716 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
717 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
718 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
719 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
720 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
724 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
728 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
735 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
739 return (xfrm_address_t
*)&fl
->fl4_dst
;
741 return (xfrm_address_t
*)&fl
->fl6_dst
;
747 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
751 return (xfrm_address_t
*)&fl
->fl4_src
;
753 return (xfrm_address_t
*)&fl
->fl6_src
;
758 static __inline__
int
759 __xfrm4_state_addr_check(struct xfrm_state
*x
,
760 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
762 if (daddr
->a4
== x
->id
.daddr
.a4
&&
763 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
768 static __inline__
int
769 __xfrm6_state_addr_check(struct xfrm_state
*x
,
770 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
772 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
773 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
774 ipv6_addr_any((struct in6_addr
*)saddr
) ||
775 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
780 static __inline__
int
781 xfrm_state_addr_check(struct xfrm_state
*x
,
782 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
783 unsigned short family
)
787 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
789 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
794 static inline int xfrm_state_kern(struct xfrm_state
*x
)
796 return atomic_read(&x
->tunnel_users
);
800 * xfrm algorithm information
802 struct xfrm_algo_auth_info
{
807 struct xfrm_algo_encr_info
{
812 struct xfrm_algo_comp_info
{
816 struct xfrm_algo_desc
{
820 struct xfrm_algo_auth_info auth
;
821 struct xfrm_algo_encr_info encr
;
822 struct xfrm_algo_comp_info comp
;
824 struct sadb_alg desc
;
827 /* XFRM tunnel handlers. */
829 int (*handler
)(struct sk_buff
*skb
);
830 void (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
833 struct xfrm6_tunnel
{
834 int (*handler
)(struct sk_buff
**pskb
);
835 void (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
836 int type
, int code
, int offset
, __u32 info
);
839 extern void xfrm_init(void);
840 extern void xfrm4_init(void);
841 extern void xfrm6_init(void);
842 extern void xfrm6_fini(void);
843 extern void xfrm_state_init(void);
844 extern void xfrm4_state_init(void);
845 extern void xfrm6_state_init(void);
846 extern void xfrm6_state_fini(void);
848 extern int xfrm_state_walk(u8 proto
, int (*func
)(struct xfrm_state
*, int, void*), void *);
849 extern struct xfrm_state
*xfrm_state_alloc(void);
850 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
851 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
852 struct xfrm_policy
*pol
, int *err
,
853 unsigned short family
);
854 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
855 extern void xfrm_state_insert(struct xfrm_state
*x
);
856 extern int xfrm_state_add(struct xfrm_state
*x
);
857 extern int xfrm_state_update(struct xfrm_state
*x
);
858 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, u32 spi
, u8 proto
, unsigned short family
);
859 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
860 extern int xfrm_state_delete(struct xfrm_state
*x
);
861 extern void xfrm_state_flush(u8 proto
);
862 extern int xfrm_replay_check(struct xfrm_state
*x
, u32 seq
);
863 extern void xfrm_replay_advance(struct xfrm_state
*x
, u32 seq
);
864 extern int xfrm_state_check(struct xfrm_state
*x
, struct sk_buff
*skb
);
865 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
866 extern int xfrm_init_state(struct xfrm_state
*x
);
867 extern int xfrm4_rcv(struct sk_buff
*skb
);
868 extern int xfrm4_output(struct sk_buff
*skb
);
869 extern int xfrm4_output_finish(struct sk_buff
*skb
);
870 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
);
871 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
);
872 extern int xfrm6_rcv_spi(struct sk_buff
**pskb
, u32 spi
);
873 extern int xfrm6_rcv(struct sk_buff
**pskb
);
874 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
);
875 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
);
876 extern u32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
877 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
878 extern u32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
879 extern int xfrm6_output(struct sk_buff
*skb
);
882 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
);
883 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
884 extern int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
);
886 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
891 static inline int xfrm4_rcv_encap(struct sk_buff
*skb
, __u16 encap_type
)
893 /* should not happen */
897 static inline int xfrm_dst_lookup(struct xfrm_dst
**dst
, struct flowi
*fl
, unsigned short family
)
903 struct xfrm_policy
*xfrm_policy_alloc(gfp_t gfp
);
904 extern int xfrm_policy_walk(int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
905 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
906 struct xfrm_policy
*xfrm_policy_bysel_ctx(int dir
, struct xfrm_selector
*sel
,
907 struct xfrm_sec_ctx
*ctx
, int delete);
908 struct xfrm_policy
*xfrm_policy_byid(int dir
, u32 id
, int delete);
909 void xfrm_policy_flush(void);
910 u32
xfrm_get_acqseq(void);
911 void xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
912 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
913 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
914 int create
, unsigned short family
);
915 extern void xfrm_policy_flush(void);
916 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
917 extern int xfrm_flush_bundles(void);
918 extern void xfrm_flush_all_bundles(void);
919 extern int xfrm_bundle_ok(struct xfrm_dst
*xdst
, struct flowi
*fl
, int family
);
920 extern void xfrm_init_pmtu(struct dst_entry
*dst
);
922 extern wait_queue_head_t km_waitq
;
923 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, u16 sport
);
924 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
);
926 extern void xfrm_input_init(void);
927 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, u32
*spi
, u32
*seq
);
929 extern void xfrm_probe_algs(void);
930 extern int xfrm_count_auth_supported(void);
931 extern int xfrm_count_enc_supported(void);
932 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
933 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
934 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
935 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
936 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
937 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
938 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
939 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
942 typedef void (icv_update_fn_t
)(struct crypto_tfm
*, struct scatterlist
*, unsigned int);
944 extern void skb_icv_walk(const struct sk_buff
*skb
, struct crypto_tfm
*tfm
,
945 int offset
, int len
, icv_update_fn_t icv_update
);
947 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
953 return a
->a4
- b
->a4
;
955 return ipv6_addr_cmp((struct in6_addr
*)a
,
956 (struct in6_addr
*)b
);
960 static inline int xfrm_policy_id2dir(u32 index
)
965 #endif /* _NET_XFRM_H */