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 struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy);
226 int (*bundle_create)(struct xfrm_policy *policy,
227 struct xfrm_state **xfrm,
230 struct dst_entry **dst_p);
231 void (*decode_session)(struct sk_buff *skb,
235 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
236 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
237 extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c);
238 extern void km_state_notify(struct xfrm_state *x, struct km_event *c);
239 #define XFRM_ACQ_EXPIRES 30
242 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
243 extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
244 extern int __xfrm_state_delete(struct xfrm_state *x);
246 struct xfrm_state_afinfo {
247 unsigned short family;
248 int (*init_flags)(struct xfrm_state *x);
249 void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl,
250 struct xfrm_tmpl *tmpl,
251 xfrm_address_t *daddr, xfrm_address_t *saddr);
252 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
253 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
256 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
257 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
259 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
264 struct module *owner;
267 #define XFRM_TYPE_NON_FRAGMENT 1
269 int (*init_state)(struct xfrm_state *x);
270 void (*destructor)(struct xfrm_state *);
271 int (*input)(struct xfrm_state *, struct sk_buff *skb);
272 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
273 int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *);
274 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
275 xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *);
276 xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *);
277 /* Estimate maximal size of result of transformation of a dgram */
278 u32 (*get_max_size)(struct xfrm_state *, int size);
281 extern int xfrm_register_type(struct xfrm_type *type, unsigned short family);
282 extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family);
283 extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family);
284 extern void xfrm_put_type(struct xfrm_type *type);
287 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
288 int (*output)(struct sk_buff *skb);
290 struct module *owner;
294 extern int xfrm_register_mode(struct xfrm_mode *mode, int family);
295 extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
296 extern struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family);
297 extern void xfrm_put_mode(struct xfrm_mode *mode);
301 /* id in template is interpreted as:
302 * daddr - destination of tunnel, may be zero for transport mode.
303 * spi - zero to acquire spi. Not zero if spi is static, then
304 * daddr must be fixed too.
305 * proto - AH/ESP/IPCOMP
309 /* Source address of tunnel. Ignored, if it is not a tunnel. */
310 xfrm_address_t saddr;
314 /* Mode: transport, tunnel etc. */
317 /* Sharing mode: unique, this session only, this user only etc. */
320 /* May skip this transfomration if no SA is found */
323 /* Bit mask of algos allowed for acquisition */
329 #define XFRM_MAX_DEPTH 6
333 struct xfrm_policy *next;
334 struct hlist_node bydst;
335 struct hlist_node byidx;
337 /* This lock only affects elements except for entry. */
340 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;
354 struct xfrm_sec_ctx *security;
355 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
358 #define XFRM_KM_TIMEOUT 30
360 #define XFRM_REPLAY_SEQ 1
361 #define XFRM_REPLAY_OSEQ 2
362 #define XFRM_REPLAY_SEQ_MASK 3
364 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
365 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
367 /* default aevent timeout in units of 100ms */
368 #define XFRM_AE_ETIME 10
369 /* Async Event timer multiplier */
370 #define XFRM_AE_ETH_M 10
371 /* default seq threshold size */
372 #define XFRM_AE_SEQT_SIZE 2
376 struct list_head list;
378 int (*notify)(struct xfrm_state *x, struct km_event *c);
379 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
380 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
381 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport);
382 int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c);
383 int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
386 extern int xfrm_register_km(struct xfrm_mgr *km);
387 extern int xfrm_unregister_km(struct xfrm_mgr *km);
389 extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
391 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
393 if (likely(policy != NULL))
394 atomic_inc(&policy->refcnt);
397 extern void __xfrm_policy_destroy(struct xfrm_policy *policy);
399 static inline void xfrm_pol_put(struct xfrm_policy *policy)
401 if (atomic_dec_and_test(&policy->refcnt))
402 __xfrm_policy_destroy(policy);
405 #ifdef CONFIG_XFRM_SUB_POLICY
406 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
409 for (i = npols - 1; i >= 0; --i)
410 xfrm_pol_put(pols[i]);
413 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
415 xfrm_pol_put(pols[0]);
419 extern void __xfrm_state_destroy(struct xfrm_state *);
421 static inline void __xfrm_state_put(struct xfrm_state *x)
423 atomic_dec(&x->refcnt);
426 static inline void xfrm_state_put(struct xfrm_state *x)
428 if (atomic_dec_and_test(&x->refcnt))
429 __xfrm_state_destroy(x);
432 static inline void xfrm_state_hold(struct xfrm_state *x)
434 atomic_inc(&x->refcnt);
437 static __inline__ int addr_match(void *token1, void *token2, int prefixlen)
444 pdw = prefixlen >> 5; /* num of whole __u32 in prefix */
445 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
448 if (memcmp(a1, a2, pdw << 2))
454 mask = htonl((0xffffffff) << (32 - pbi));
456 if ((a1[pdw] ^ a2[pdw]) & mask)
464 u16 xfrm_flowi_sport(struct flowi *fl)
471 port = fl->fl_ip_sport;
475 port = htons(fl->fl_icmp_type);
477 #ifdef CONFIG_IPV6_MIP6
479 port = htons(fl->fl_mh_type);
489 u16 xfrm_flowi_dport(struct flowi *fl)
496 port = fl->fl_ip_dport;
500 port = htons(fl->fl_icmp_code);
509 __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl)
511 return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) &&
512 addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) &&
513 !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) &&
514 !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) &&
515 (fl->proto == sel->proto || !sel->proto) &&
516 (fl->oif == sel->ifindex || !sel->ifindex);
520 __xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl)
522 return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) &&
523 addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) &&
524 !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) &&
525 !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) &&
526 (fl->proto == sel->proto || !sel->proto) &&
527 (fl->oif == sel->ifindex || !sel->ifindex);
531 xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
532 unsigned short family)
536 return __xfrm4_selector_match(sel, fl);
538 return __xfrm6_selector_match(sel, fl);
543 #ifdef CONFIG_SECURITY_NETWORK_XFRM
544 /* If neither has a context --> match
545 * Otherwise, both must have a context and the sids, doi, alg must match
547 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
549 return ((!s1 && !s2) ||
551 (s1->ctx_sid == s2->ctx_sid) &&
552 (s1->ctx_doi == s2->ctx_doi) &&
553 (s1->ctx_alg == s2->ctx_alg)));
556 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
562 /* A struct encoding bundle of transformations to apply to some set of flow.
564 * dst->child points to the next element of bundle.
565 * dst->xfrm points to an instanse of transformer.
567 * Due to unfortunate limitations of current routing cache, which we
568 * have no time to fix, it mirrors struct rtable and bound to the same
569 * routing key, including saddr,daddr. However, we can have many of
570 * bundles differing by session id. All the bundles grow from a parent
576 struct xfrm_dst *next;
577 struct dst_entry dst;
581 struct dst_entry *route;
583 u32 route_mtu_cached;
584 u32 child_mtu_cached;
589 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
591 dst_release(xdst->route);
592 if (likely(xdst->u.dst.xfrm))
593 xfrm_state_put(xdst->u.dst.xfrm);
596 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
602 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
605 static inline struct sec_path *
606 secpath_get(struct sec_path *sp)
609 atomic_inc(&sp->refcnt);
613 extern void __secpath_destroy(struct sec_path *sp);
616 secpath_put(struct sec_path *sp)
618 if (sp && atomic_dec_and_test(&sp->refcnt))
619 __secpath_destroy(sp);
622 extern struct sec_path *secpath_dup(struct sec_path *src);
625 secpath_reset(struct sk_buff *skb)
628 secpath_put(skb->sp);
634 __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
636 return (tmpl->saddr.a4 &&
637 tmpl->saddr.a4 != x->props.saddr.a4);
641 __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
643 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
644 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
648 xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family)
652 return __xfrm4_state_addr_cmp(tmpl, x);
654 return __xfrm6_state_addr_cmp(tmpl, x);
661 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
663 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
665 if (sk && sk->sk_policy[XFRM_POLICY_IN])
666 return __xfrm_policy_check(sk, dir, skb, family);
668 return (!xfrm_policy_count[dir] && !skb->sp) ||
669 (skb->dst->flags & DST_NOPOLICY) ||
670 __xfrm_policy_check(sk, dir, skb, family);
673 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
675 return xfrm_policy_check(sk, dir, skb, AF_INET);
678 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
680 return xfrm_policy_check(sk, dir, skb, AF_INET6);
683 extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family);
684 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
686 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
688 return !xfrm_policy_count[XFRM_POLICY_OUT] ||
689 (skb->dst->flags & DST_NOXFRM) ||
690 __xfrm_route_forward(skb, family);
693 static inline int xfrm4_route_forward(struct sk_buff *skb)
695 return xfrm_route_forward(skb, AF_INET);
698 static inline int xfrm6_route_forward(struct sk_buff *skb)
700 return xfrm_route_forward(skb, AF_INET6);
703 extern int __xfrm_sk_clone_policy(struct sock *sk);
705 static inline int xfrm_sk_clone_policy(struct sock *sk)
707 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
708 return __xfrm_sk_clone_policy(sk);
712 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
714 static inline void xfrm_sk_free_policy(struct sock *sk)
716 if (unlikely(sk->sk_policy[0] != NULL)) {
717 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
718 sk->sk_policy[0] = NULL;
720 if (unlikely(sk->sk_policy[1] != NULL)) {
721 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
722 sk->sk_policy[1] = NULL;
728 static inline void xfrm_sk_free_policy(struct sock *sk) {}
729 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
730 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
731 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
732 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
736 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
740 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
747 xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family)
751 return (xfrm_address_t *)&fl->fl4_dst;
753 return (xfrm_address_t *)&fl->fl6_dst;
759 xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
763 return (xfrm_address_t *)&fl->fl4_src;
765 return (xfrm_address_t *)&fl->fl6_src;
770 static __inline__ int
771 __xfrm4_state_addr_check(struct xfrm_state *x,
772 xfrm_address_t *daddr, xfrm_address_t *saddr)
774 if (daddr->a4 == x->id.daddr.a4 &&
775 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
780 static __inline__ int
781 __xfrm6_state_addr_check(struct xfrm_state *x,
782 xfrm_address_t *daddr, xfrm_address_t *saddr)
784 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
785 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
786 ipv6_addr_any((struct in6_addr *)saddr) ||
787 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
792 static __inline__ int
793 xfrm_state_addr_check(struct xfrm_state *x,
794 xfrm_address_t *daddr, xfrm_address_t *saddr,
795 unsigned short family)
799 return __xfrm4_state_addr_check(x, daddr, saddr);
801 return __xfrm6_state_addr_check(x, daddr, saddr);
806 static __inline__ int
807 xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl,
808 unsigned short family)
812 return __xfrm4_state_addr_check(x,
813 (xfrm_address_t *)&fl->fl4_dst,
814 (xfrm_address_t *)&fl->fl4_src);
816 return __xfrm6_state_addr_check(x,
817 (xfrm_address_t *)&fl->fl6_dst,
818 (xfrm_address_t *)&fl->fl6_src);
823 static inline int xfrm_state_kern(struct xfrm_state *x)
825 return atomic_read(&x->tunnel_users);
828 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
830 return (!userproto || proto == userproto ||
831 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
832 proto == IPPROTO_ESP ||
833 proto == IPPROTO_COMP)));
837 * xfrm algorithm information
839 struct xfrm_algo_auth_info {
844 struct xfrm_algo_encr_info {
849 struct xfrm_algo_comp_info {
853 struct xfrm_algo_desc {
858 struct xfrm_algo_auth_info auth;
859 struct xfrm_algo_encr_info encr;
860 struct xfrm_algo_comp_info comp;
862 struct sadb_alg desc;
865 /* XFRM tunnel handlers. */
867 int (*handler)(struct sk_buff *skb);
868 int (*err_handler)(struct sk_buff *skb, __u32 info);
870 struct xfrm_tunnel *next;
874 struct xfrm6_tunnel {
875 int (*handler)(struct sk_buff *skb);
876 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
877 int type, int code, int offset, __u32 info);
879 struct xfrm6_tunnel *next;
883 extern void xfrm_init(void);
884 extern void xfrm4_init(void);
885 extern void xfrm6_init(void);
886 extern void xfrm6_fini(void);
887 extern void xfrm_state_init(void);
888 extern void xfrm4_state_init(void);
889 extern void xfrm6_state_init(void);
890 extern void xfrm6_state_fini(void);
892 extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
893 extern struct xfrm_state *xfrm_state_alloc(void);
894 extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
895 struct flowi *fl, struct xfrm_tmpl *tmpl,
896 struct xfrm_policy *pol, int *err,
897 unsigned short family);
898 extern int xfrm_state_check_expire(struct xfrm_state *x);
899 extern void xfrm_state_insert(struct xfrm_state *x);
900 extern int xfrm_state_add(struct xfrm_state *x);
901 extern int xfrm_state_update(struct xfrm_state *x);
902 extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family);
903 extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family);
904 #ifdef CONFIG_XFRM_SUB_POLICY
905 extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
906 int n, unsigned short family);
907 extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
908 int n, unsigned short family);
910 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
911 int n, unsigned short family)
916 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
917 int n, unsigned short family)
922 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
923 extern int xfrm_state_delete(struct xfrm_state *x);
924 extern void xfrm_state_flush(u8 proto);
925 extern int xfrm_replay_check(struct xfrm_state *x, u32 seq);
926 extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq);
927 extern void xfrm_replay_notify(struct xfrm_state *x, int event);
928 extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb);
929 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
930 extern int xfrm_init_state(struct xfrm_state *x);
931 extern int xfrm4_rcv(struct sk_buff *skb);
932 extern int xfrm4_output(struct sk_buff *skb);
933 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler);
934 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler);
935 extern int xfrm6_rcv_spi(struct sk_buff *skb, u32 spi);
936 extern int xfrm6_rcv(struct sk_buff **pskb);
937 extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
938 xfrm_address_t *saddr, u8 proto);
939 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler);
940 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler);
941 extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr);
942 extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr);
943 extern u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr);
944 extern int xfrm6_output(struct sk_buff *skb);
945 extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
949 extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type);
950 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
951 extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
953 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
958 static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
960 /* should not happen */
964 static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
970 struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
971 extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *);
972 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
973 struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
974 struct xfrm_selector *sel,
975 struct xfrm_sec_ctx *ctx, int delete);
976 struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete);
977 void xfrm_policy_flush(u8 type);
978 u32 xfrm_get_acqseq(void);
979 void xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
980 struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
981 xfrm_address_t *daddr, xfrm_address_t *saddr,
982 int create, unsigned short family);
983 extern void xfrm_policy_flush(u8 type);
984 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
985 extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family, int strict);
986 extern void xfrm_init_pmtu(struct dst_entry *dst);
988 extern wait_queue_head_t km_waitq;
989 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport);
990 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid);
991 extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
993 extern void xfrm_input_init(void);
994 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq);
996 extern void xfrm_probe_algs(void);
997 extern int xfrm_count_auth_supported(void);
998 extern int xfrm_count_enc_supported(void);
999 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1000 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1001 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1002 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1003 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1004 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe);
1005 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe);
1006 extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe);
1010 typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *,
1013 extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm,
1014 int offset, int len, icv_update_fn_t icv_update);
1016 static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b,
1022 return a->a4 - b->a4;
1024 return ipv6_addr_cmp((struct in6_addr *)a,
1025 (struct in6_addr *)b);
1029 static inline int xfrm_policy_id2dir(u32 index)
1034 static inline int xfrm_aevent_is_on(void)
1040 nlsk = rcu_dereference(xfrm_nl);
1042 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1047 static inline void xfrm_aevent_doreplay(struct xfrm_state *x)
1049 if (xfrm_aevent_is_on())
1050 xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
1054 #endif /* _NET_XFRM_H */