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_max_size)(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 #define XFRM_KM_TIMEOUT 30
367 #define XFRM_REPLAY_SEQ 1
368 #define XFRM_REPLAY_OSEQ 2
369 #define XFRM_REPLAY_SEQ_MASK 3
371 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
372 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
374 /* default aevent timeout in units of 100ms */
375 #define XFRM_AE_ETIME 10
376 /* Async Event timer multiplier */
377 #define XFRM_AE_ETH_M 10
378 /* default seq threshold size */
379 #define XFRM_AE_SEQT_SIZE 2
383 struct list_head list;
385 int (*notify)(struct xfrm_state *x, struct km_event *c);
386 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
387 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
388 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
389 int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c);
390 int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
393 extern int xfrm_register_km(struct xfrm_mgr *km);
394 extern int xfrm_unregister_km(struct xfrm_mgr *km);
396 extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
398 /* Audit Information */
405 #ifdef CONFIG_AUDITSYSCALL
406 extern void xfrm_audit_log(uid_t auid, u32 secid, int type, int result,
407 struct xfrm_policy *xp, struct xfrm_state *x);
409 #define xfrm_audit_log(a,s,t,r,p,x) do { ; } while (0)
410 #endif /* CONFIG_AUDITSYSCALL */
412 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
414 if (likely(policy != NULL))
415 atomic_inc(&policy->refcnt);
418 extern void __xfrm_policy_destroy(struct xfrm_policy *policy);
420 static inline void xfrm_pol_put(struct xfrm_policy *policy)
422 if (atomic_dec_and_test(&policy->refcnt))
423 __xfrm_policy_destroy(policy);
426 #ifdef CONFIG_XFRM_SUB_POLICY
427 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
430 for (i = npols - 1; i >= 0; --i)
431 xfrm_pol_put(pols[i]);
434 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
436 xfrm_pol_put(pols[0]);
440 extern void __xfrm_state_destroy(struct xfrm_state *);
442 static inline void __xfrm_state_put(struct xfrm_state *x)
444 atomic_dec(&x->refcnt);
447 static inline void xfrm_state_put(struct xfrm_state *x)
449 if (atomic_dec_and_test(&x->refcnt))
450 __xfrm_state_destroy(x);
453 static inline void xfrm_state_hold(struct xfrm_state *x)
455 atomic_inc(&x->refcnt);
458 static __inline__ int addr_match(void *token1, void *token2, int prefixlen)
465 pdw = prefixlen >> 5; /* num of whole __u32 in prefix */
466 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
469 if (memcmp(a1, a2, pdw << 2))
475 mask = htonl((0xffffffff) << (32 - pbi));
477 if ((a1[pdw] ^ a2[pdw]) & mask)
485 __be16 xfrm_flowi_sport(struct flowi *fl)
491 case IPPROTO_UDPLITE:
493 port = fl->fl_ip_sport;
497 port = htons(fl->fl_icmp_type);
499 #ifdef CONFIG_IPV6_MIP6
501 port = htons(fl->fl_mh_type);
511 __be16 xfrm_flowi_dport(struct flowi *fl)
517 case IPPROTO_UDPLITE:
519 port = fl->fl_ip_dport;
523 port = htons(fl->fl_icmp_code);
531 extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
532 unsigned short family);
534 #ifdef CONFIG_SECURITY_NETWORK_XFRM
535 /* If neither has a context --> match
536 * Otherwise, both must have a context and the sids, doi, alg must match
538 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
540 return ((!s1 && !s2) ||
542 (s1->ctx_sid == s2->ctx_sid) &&
543 (s1->ctx_doi == s2->ctx_doi) &&
544 (s1->ctx_alg == s2->ctx_alg)));
547 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
553 /* A struct encoding bundle of transformations to apply to some set of flow.
555 * dst->child points to the next element of bundle.
556 * dst->xfrm points to an instanse of transformer.
558 * Due to unfortunate limitations of current routing cache, which we
559 * have no time to fix, it mirrors struct rtable and bound to the same
560 * routing key, including saddr,daddr. However, we can have many of
561 * bundles differing by session id. All the bundles grow from a parent
567 struct xfrm_dst *next;
568 struct dst_entry dst;
572 struct dst_entry *route;
574 u32 route_mtu_cached;
575 u32 child_mtu_cached;
580 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
582 dst_release(xdst->route);
583 if (likely(xdst->u.dst.xfrm))
584 xfrm_state_put(xdst->u.dst.xfrm);
587 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
593 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
596 static inline struct sec_path *
597 secpath_get(struct sec_path *sp)
600 atomic_inc(&sp->refcnt);
604 extern void __secpath_destroy(struct sec_path *sp);
607 secpath_put(struct sec_path *sp)
609 if (sp && atomic_dec_and_test(&sp->refcnt))
610 __secpath_destroy(sp);
613 extern struct sec_path *secpath_dup(struct sec_path *src);
616 secpath_reset(struct sk_buff *skb)
619 secpath_put(skb->sp);
625 xfrm_addr_any(xfrm_address_t *addr, unsigned short family)
629 return addr->a4 == 0;
631 return ipv6_addr_any((struct in6_addr *)&addr->a6);
637 __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
639 return (tmpl->saddr.a4 &&
640 tmpl->saddr.a4 != x->props.saddr.a4);
644 __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
646 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
647 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
651 xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family)
655 return __xfrm4_state_addr_cmp(tmpl, x);
657 return __xfrm6_state_addr_cmp(tmpl, x);
664 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
666 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
668 if (sk && sk->sk_policy[XFRM_POLICY_IN])
669 return __xfrm_policy_check(sk, dir, skb, family);
671 return (!xfrm_policy_count[dir] && !skb->sp) ||
672 (skb->dst->flags & DST_NOPOLICY) ||
673 __xfrm_policy_check(sk, dir, skb, family);
676 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
678 return xfrm_policy_check(sk, dir, skb, AF_INET);
681 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
683 return xfrm_policy_check(sk, dir, skb, AF_INET6);
686 extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family);
687 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
689 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
691 return !xfrm_policy_count[XFRM_POLICY_OUT] ||
692 (skb->dst->flags & DST_NOXFRM) ||
693 __xfrm_route_forward(skb, family);
696 static inline int xfrm4_route_forward(struct sk_buff *skb)
698 return xfrm_route_forward(skb, AF_INET);
701 static inline int xfrm6_route_forward(struct sk_buff *skb)
703 return xfrm_route_forward(skb, AF_INET6);
706 extern int __xfrm_sk_clone_policy(struct sock *sk);
708 static inline int xfrm_sk_clone_policy(struct sock *sk)
710 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
711 return __xfrm_sk_clone_policy(sk);
715 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
717 static inline void xfrm_sk_free_policy(struct sock *sk)
719 if (unlikely(sk->sk_policy[0] != NULL)) {
720 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
721 sk->sk_policy[0] = NULL;
723 if (unlikely(sk->sk_policy[1] != NULL)) {
724 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
725 sk->sk_policy[1] = NULL;
731 static inline void xfrm_sk_free_policy(struct sock *sk) {}
732 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
733 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
734 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
735 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
739 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
743 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
750 xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family)
754 return (xfrm_address_t *)&fl->fl4_dst;
756 return (xfrm_address_t *)&fl->fl6_dst;
762 xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
766 return (xfrm_address_t *)&fl->fl4_src;
768 return (xfrm_address_t *)&fl->fl6_src;
773 static __inline__ int
774 __xfrm4_state_addr_check(struct xfrm_state *x,
775 xfrm_address_t *daddr, xfrm_address_t *saddr)
777 if (daddr->a4 == x->id.daddr.a4 &&
778 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
783 static __inline__ int
784 __xfrm6_state_addr_check(struct xfrm_state *x,
785 xfrm_address_t *daddr, xfrm_address_t *saddr)
787 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
788 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
789 ipv6_addr_any((struct in6_addr *)saddr) ||
790 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
795 static __inline__ int
796 xfrm_state_addr_check(struct xfrm_state *x,
797 xfrm_address_t *daddr, xfrm_address_t *saddr,
798 unsigned short family)
802 return __xfrm4_state_addr_check(x, daddr, saddr);
804 return __xfrm6_state_addr_check(x, daddr, saddr);
809 static __inline__ int
810 xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl,
811 unsigned short family)
815 return __xfrm4_state_addr_check(x,
816 (xfrm_address_t *)&fl->fl4_dst,
817 (xfrm_address_t *)&fl->fl4_src);
819 return __xfrm6_state_addr_check(x,
820 (xfrm_address_t *)&fl->fl6_dst,
821 (xfrm_address_t *)&fl->fl6_src);
826 static inline int xfrm_state_kern(struct xfrm_state *x)
828 return atomic_read(&x->tunnel_users);
831 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
833 return (!userproto || proto == userproto ||
834 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
835 proto == IPPROTO_ESP ||
836 proto == IPPROTO_COMP)));
840 * xfrm algorithm information
842 struct xfrm_algo_auth_info {
847 struct xfrm_algo_encr_info {
852 struct xfrm_algo_comp_info {
856 struct xfrm_algo_desc {
861 struct xfrm_algo_auth_info auth;
862 struct xfrm_algo_encr_info encr;
863 struct xfrm_algo_comp_info comp;
865 struct sadb_alg desc;
868 /* XFRM tunnel handlers. */
870 int (*handler)(struct sk_buff *skb);
871 int (*err_handler)(struct sk_buff *skb, __u32 info);
873 struct xfrm_tunnel *next;
877 struct xfrm6_tunnel {
878 int (*handler)(struct sk_buff *skb);
879 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
880 int type, int code, int offset, __be32 info);
881 struct xfrm6_tunnel *next;
885 extern void xfrm_init(void);
886 extern void xfrm4_init(void);
887 extern void xfrm6_init(void);
888 extern void xfrm6_fini(void);
889 extern void xfrm_state_init(void);
890 extern void xfrm4_state_init(void);
891 extern void xfrm6_state_init(void);
892 extern void xfrm6_state_fini(void);
894 extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
895 extern struct xfrm_state *xfrm_state_alloc(void);
896 extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
897 struct flowi *fl, struct xfrm_tmpl *tmpl,
898 struct xfrm_policy *pol, int *err,
899 unsigned short family);
900 extern int xfrm_state_check_expire(struct xfrm_state *x);
901 extern void xfrm_state_insert(struct xfrm_state *x);
902 extern int xfrm_state_add(struct xfrm_state *x);
903 extern int xfrm_state_update(struct xfrm_state *x);
904 extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family);
905 extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family);
906 #ifdef CONFIG_XFRM_SUB_POLICY
907 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
908 int n, unsigned short family);
909 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
910 int n, unsigned short family);
912 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
913 int n, unsigned short family)
918 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
919 int n, unsigned short family)
924 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
925 extern int xfrm_state_delete(struct xfrm_state *x);
926 extern void xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info);
927 extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq);
928 extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq);
929 extern void xfrm_replay_notify(struct xfrm_state *x, int event);
930 extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb);
931 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
932 extern int xfrm_init_state(struct xfrm_state *x);
933 extern int xfrm4_rcv(struct sk_buff *skb);
934 extern int xfrm4_output(struct sk_buff *skb);
935 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler);
936 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler);
937 extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi);
938 extern int xfrm6_rcv(struct sk_buff **pskb);
939 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
940 xfrm_address_t *saddr, u8 proto);
941 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler);
942 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler);
943 extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr);
944 extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr);
945 extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr);
946 extern int xfrm6_output(struct sk_buff *skb);
947 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
951 extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type);
952 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
953 extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
955 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
960 static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
962 /* should not happen */
966 static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
972 struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
973 extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *);
974 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
975 struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
976 struct xfrm_selector *sel,
977 struct xfrm_sec_ctx *ctx, int delete);
978 struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete);
979 void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
980 u32 xfrm_get_acqseq(void);
981 void xfrm_alloc_spi(struct xfrm_state *x, __be32 minspi, __be32 maxspi);
982 struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
983 xfrm_address_t *daddr, xfrm_address_t *saddr,
984 int create, unsigned short family);
985 extern void xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info);
986 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
987 extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst,
988 struct flowi *fl, int family, int strict);
989 extern void xfrm_init_pmtu(struct dst_entry *dst);
991 extern wait_queue_head_t km_waitq;
992 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
993 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
994 extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
996 extern void xfrm_input_init(void);
997 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
999 extern void xfrm_probe_algs(void);
1000 extern int xfrm_count_auth_supported(void);
1001 extern int xfrm_count_enc_supported(void);
1002 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1003 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1004 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1005 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1006 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1007 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe);
1008 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe);
1009 extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe);
1013 typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
1016 extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm,
1017 int offset, int len, icv_update_fn_t icv_update);
1019 static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b,
1025 return (__force __u32)a->a4 - (__force __u32)b->a4;
1027 return ipv6_addr_cmp((struct in6_addr *)a,
1028 (struct in6_addr *)b);
1032 static inline int xfrm_policy_id2dir(u32 index)
1037 static inline int xfrm_aevent_is_on(void)
1043 nlsk = rcu_dereference(xfrm_nl);
1045 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1050 static inline void xfrm_aevent_doreplay(struct xfrm_state *x)
1052 if (xfrm_aevent_is_on())
1053 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1057 #endif /* _NET_XFRM_H */