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;
315 /* Mode: transport, tunnel etc. */
318 /* Sharing mode: unique, this session only, this user only etc. */
321 /* May skip this transfomration if no SA is found */
324 /* Bit mask of algos allowed for acquisition */
330 #define XFRM_MAX_DEPTH 6
334 struct xfrm_policy *next;
335 struct hlist_node bydst;
336 struct hlist_node byidx;
338 /* This lock only affects elements except for entry. */
341 struct timer_list timer;
345 struct xfrm_selector selector;
346 struct xfrm_lifetime_cfg lft;
347 struct xfrm_lifetime_cur curlft;
348 struct dst_entry *bundles;
355 /* XXX 1 byte hole, try to pack */
356 struct xfrm_sec_ctx *security;
357 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
360 #define XFRM_KM_TIMEOUT 30
362 #define XFRM_REPLAY_SEQ 1
363 #define XFRM_REPLAY_OSEQ 2
364 #define XFRM_REPLAY_SEQ_MASK 3
366 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
367 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
369 /* default aevent timeout in units of 100ms */
370 #define XFRM_AE_ETIME 10
371 /* Async Event timer multiplier */
372 #define XFRM_AE_ETH_M 10
373 /* default seq threshold size */
374 #define XFRM_AE_SEQT_SIZE 2
378 struct list_head list;
380 int (*notify)(struct xfrm_state *x, struct km_event *c);
381 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
382 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
383 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
384 int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c);
385 int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
388 extern int xfrm_register_km(struct xfrm_mgr *km);
389 extern int xfrm_unregister_km(struct xfrm_mgr *km);
391 extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
393 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
395 if (likely(policy != NULL))
396 atomic_inc(&policy->refcnt);
399 extern void __xfrm_policy_destroy(struct xfrm_policy *policy);
401 static inline void xfrm_pol_put(struct xfrm_policy *policy)
403 if (atomic_dec_and_test(&policy->refcnt))
404 __xfrm_policy_destroy(policy);
407 #ifdef CONFIG_XFRM_SUB_POLICY
408 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
411 for (i = npols - 1; i >= 0; --i)
412 xfrm_pol_put(pols[i]);
415 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
417 xfrm_pol_put(pols[0]);
421 extern void __xfrm_state_destroy(struct xfrm_state *);
423 static inline void __xfrm_state_put(struct xfrm_state *x)
425 atomic_dec(&x->refcnt);
428 static inline void xfrm_state_put(struct xfrm_state *x)
430 if (atomic_dec_and_test(&x->refcnt))
431 __xfrm_state_destroy(x);
434 static inline void xfrm_state_hold(struct xfrm_state *x)
436 atomic_inc(&x->refcnt);
439 static __inline__ int addr_match(void *token1, void *token2, int prefixlen)
446 pdw = prefixlen >> 5; /* num of whole __u32 in prefix */
447 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
450 if (memcmp(a1, a2, pdw << 2))
456 mask = htonl((0xffffffff) << (32 - pbi));
458 if ((a1[pdw] ^ a2[pdw]) & mask)
466 __be16 xfrm_flowi_sport(struct flowi *fl)
472 case IPPROTO_UDPLITE:
474 port = fl->fl_ip_sport;
478 port = htons(fl->fl_icmp_type);
480 #ifdef CONFIG_IPV6_MIP6
482 port = htons(fl->fl_mh_type);
492 __be16 xfrm_flowi_dport(struct flowi *fl)
498 case IPPROTO_UDPLITE:
500 port = fl->fl_ip_dport;
504 port = htons(fl->fl_icmp_code);
512 extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
513 unsigned short family);
515 #ifdef CONFIG_SECURITY_NETWORK_XFRM
516 /* If neither has a context --> match
517 * Otherwise, both must have a context and the sids, doi, alg must match
519 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
521 return ((!s1 && !s2) ||
523 (s1->ctx_sid == s2->ctx_sid) &&
524 (s1->ctx_doi == s2->ctx_doi) &&
525 (s1->ctx_alg == s2->ctx_alg)));
528 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
534 /* A struct encoding bundle of transformations to apply to some set of flow.
536 * dst->child points to the next element of bundle.
537 * dst->xfrm points to an instanse of transformer.
539 * Due to unfortunate limitations of current routing cache, which we
540 * have no time to fix, it mirrors struct rtable and bound to the same
541 * routing key, including saddr,daddr. However, we can have many of
542 * bundles differing by session id. All the bundles grow from a parent
548 struct xfrm_dst *next;
549 struct dst_entry dst;
553 struct dst_entry *route;
555 u32 route_mtu_cached;
556 u32 child_mtu_cached;
561 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
563 dst_release(xdst->route);
564 if (likely(xdst->u.dst.xfrm))
565 xfrm_state_put(xdst->u.dst.xfrm);
568 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
574 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
577 static inline struct sec_path *
578 secpath_get(struct sec_path *sp)
581 atomic_inc(&sp->refcnt);
585 extern void __secpath_destroy(struct sec_path *sp);
588 secpath_put(struct sec_path *sp)
590 if (sp && atomic_dec_and_test(&sp->refcnt))
591 __secpath_destroy(sp);
594 extern struct sec_path *secpath_dup(struct sec_path *src);
597 secpath_reset(struct sk_buff *skb)
600 secpath_put(skb->sp);
606 xfrm_addr_any(xfrm_address_t *addr, unsigned short family)
610 return addr->a4 == 0;
612 return ipv6_addr_any((struct in6_addr *)&addr->a6);
618 __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
620 return (tmpl->saddr.a4 &&
621 tmpl->saddr.a4 != x->props.saddr.a4);
625 __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
627 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
628 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
632 xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family)
636 return __xfrm4_state_addr_cmp(tmpl, x);
638 return __xfrm6_state_addr_cmp(tmpl, x);
645 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
647 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
649 if (sk && sk->sk_policy[XFRM_POLICY_IN])
650 return __xfrm_policy_check(sk, dir, skb, family);
652 return (!xfrm_policy_count[dir] && !skb->sp) ||
653 (skb->dst->flags & DST_NOPOLICY) ||
654 __xfrm_policy_check(sk, dir, skb, family);
657 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
659 return xfrm_policy_check(sk, dir, skb, AF_INET);
662 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
664 return xfrm_policy_check(sk, dir, skb, AF_INET6);
667 extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family);
668 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
670 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
672 return !xfrm_policy_count[XFRM_POLICY_OUT] ||
673 (skb->dst->flags & DST_NOXFRM) ||
674 __xfrm_route_forward(skb, family);
677 static inline int xfrm4_route_forward(struct sk_buff *skb)
679 return xfrm_route_forward(skb, AF_INET);
682 static inline int xfrm6_route_forward(struct sk_buff *skb)
684 return xfrm_route_forward(skb, AF_INET6);
687 extern int __xfrm_sk_clone_policy(struct sock *sk);
689 static inline int xfrm_sk_clone_policy(struct sock *sk)
691 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
692 return __xfrm_sk_clone_policy(sk);
696 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
698 static inline void xfrm_sk_free_policy(struct sock *sk)
700 if (unlikely(sk->sk_policy[0] != NULL)) {
701 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
702 sk->sk_policy[0] = NULL;
704 if (unlikely(sk->sk_policy[1] != NULL)) {
705 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
706 sk->sk_policy[1] = NULL;
712 static inline void xfrm_sk_free_policy(struct sock *sk) {}
713 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
714 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
715 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
716 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
720 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
724 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
731 xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family)
735 return (xfrm_address_t *)&fl->fl4_dst;
737 return (xfrm_address_t *)&fl->fl6_dst;
743 xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
747 return (xfrm_address_t *)&fl->fl4_src;
749 return (xfrm_address_t *)&fl->fl6_src;
754 static __inline__ int
755 __xfrm4_state_addr_check(struct xfrm_state *x,
756 xfrm_address_t *daddr, xfrm_address_t *saddr)
758 if (daddr->a4 == x->id.daddr.a4 &&
759 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
764 static __inline__ int
765 __xfrm6_state_addr_check(struct xfrm_state *x,
766 xfrm_address_t *daddr, xfrm_address_t *saddr)
768 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
769 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
770 ipv6_addr_any((struct in6_addr *)saddr) ||
771 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
776 static __inline__ int
777 xfrm_state_addr_check(struct xfrm_state *x,
778 xfrm_address_t *daddr, xfrm_address_t *saddr,
779 unsigned short family)
783 return __xfrm4_state_addr_check(x, daddr, saddr);
785 return __xfrm6_state_addr_check(x, daddr, saddr);
790 static __inline__ int
791 xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl,
792 unsigned short family)
796 return __xfrm4_state_addr_check(x,
797 (xfrm_address_t *)&fl->fl4_dst,
798 (xfrm_address_t *)&fl->fl4_src);
800 return __xfrm6_state_addr_check(x,
801 (xfrm_address_t *)&fl->fl6_dst,
802 (xfrm_address_t *)&fl->fl6_src);
807 static inline int xfrm_state_kern(struct xfrm_state *x)
809 return atomic_read(&x->tunnel_users);
812 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
814 return (!userproto || proto == userproto ||
815 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
816 proto == IPPROTO_ESP ||
817 proto == IPPROTO_COMP)));
821 * xfrm algorithm information
823 struct xfrm_algo_auth_info {
828 struct xfrm_algo_encr_info {
833 struct xfrm_algo_comp_info {
837 struct xfrm_algo_desc {
842 struct xfrm_algo_auth_info auth;
843 struct xfrm_algo_encr_info encr;
844 struct xfrm_algo_comp_info comp;
846 struct sadb_alg desc;
849 /* XFRM tunnel handlers. */
851 int (*handler)(struct sk_buff *skb);
852 int (*err_handler)(struct sk_buff *skb, __u32 info);
854 struct xfrm_tunnel *next;
858 struct xfrm6_tunnel {
859 int (*handler)(struct sk_buff *skb);
860 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
861 int type, int code, int offset, __be32 info);
862 struct xfrm6_tunnel *next;
866 extern void xfrm_init(void);
867 extern void xfrm4_init(void);
868 extern void xfrm6_init(void);
869 extern void xfrm6_fini(void);
870 extern void xfrm_state_init(void);
871 extern void xfrm4_state_init(void);
872 extern void xfrm6_state_init(void);
873 extern void xfrm6_state_fini(void);
875 extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
876 extern struct xfrm_state *xfrm_state_alloc(void);
877 extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
878 struct flowi *fl, struct xfrm_tmpl *tmpl,
879 struct xfrm_policy *pol, int *err,
880 unsigned short family);
881 extern int xfrm_state_check_expire(struct xfrm_state *x);
882 extern void xfrm_state_insert(struct xfrm_state *x);
883 extern int xfrm_state_add(struct xfrm_state *x);
884 extern int xfrm_state_update(struct xfrm_state *x);
885 extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family);
886 extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family);
887 #ifdef CONFIG_XFRM_SUB_POLICY
888 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
889 int n, unsigned short family);
890 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
891 int n, unsigned short family);
893 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
894 int n, unsigned short family)
899 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
900 int n, unsigned short family)
905 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
906 extern int xfrm_state_delete(struct xfrm_state *x);
907 extern void xfrm_state_flush(u8 proto);
908 extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq);
909 extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq);
910 extern void xfrm_replay_notify(struct xfrm_state *x, int event);
911 extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb);
912 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
913 extern int xfrm_init_state(struct xfrm_state *x);
914 extern int xfrm4_rcv(struct sk_buff *skb);
915 extern int xfrm4_output(struct sk_buff *skb);
916 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler);
917 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler);
918 extern int xfrm6_rcv_spi(struct sk_buff *skb, __be32 spi);
919 extern int xfrm6_rcv(struct sk_buff **pskb);
920 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
921 xfrm_address_t *saddr, u8 proto);
922 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler);
923 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler);
924 extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr);
925 extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr);
926 extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr);
927 extern int xfrm6_output(struct sk_buff *skb);
928 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
932 extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type);
933 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
934 extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
936 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
941 static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
943 /* should not happen */
947 static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
953 struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
954 extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *);
955 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
956 struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
957 struct xfrm_selector *sel,
958 struct xfrm_sec_ctx *ctx, int delete);
959 struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete);
960 void xfrm_policy_flush(u8 type);
961 u32 xfrm_get_acqseq(void);
962 void xfrm_alloc_spi(struct xfrm_state *x, __be32 minspi, __be32 maxspi);
963 struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
964 xfrm_address_t *daddr, xfrm_address_t *saddr,
965 int create, unsigned short family);
966 extern void xfrm_policy_flush(u8 type);
967 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
968 extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst,
969 struct flowi *fl, int family, int strict);
970 extern void xfrm_init_pmtu(struct dst_entry *dst);
972 extern wait_queue_head_t km_waitq;
973 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
974 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
975 extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
977 extern void xfrm_input_init(void);
978 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
980 extern void xfrm_probe_algs(void);
981 extern int xfrm_count_auth_supported(void);
982 extern int xfrm_count_enc_supported(void);
983 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
984 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
985 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
986 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
987 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
988 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe);
989 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe);
990 extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe);
994 typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
997 extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm,
998 int offset, int len, icv_update_fn_t icv_update);
1000 static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b,
1006 return (__force __u32)a->a4 - (__force __u32)b->a4;
1008 return ipv6_addr_cmp((struct in6_addr *)a,
1009 (struct in6_addr *)b);
1013 static inline int xfrm_policy_id2dir(u32 index)
1018 static inline int xfrm_aevent_is_on(void)
1024 nlsk = rcu_dereference(xfrm_nl);
1026 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1031 static inline void xfrm_aevent_doreplay(struct xfrm_state *x)
1033 if (xfrm_aevent_is_on())
1034 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1038 #endif /* _NET_XFRM_H */