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 atomic_dec(&x->refcnt);
411 static inline void xfrm_state_put(struct xfrm_state *x)
413 if (atomic_dec_and_test(&x->refcnt))
414 __xfrm_state_destroy(x);
417 static inline void xfrm_state_hold(struct xfrm_state *x)
419 atomic_inc(&x->refcnt);
422 static __inline__ int addr_match(void *token1, void *token2, int prefixlen)
429 pdw = prefixlen >> 5; /* num of whole __u32 in prefix */
430 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
433 if (memcmp(a1, a2, pdw << 2))
439 mask = htonl((0xffffffff) << (32 - pbi));
441 if ((a1[pdw] ^ a2[pdw]) & mask)
449 u16 xfrm_flowi_sport(struct flowi *fl)
456 port = fl->fl_ip_sport;
460 port = htons(fl->fl_icmp_type);
469 u16 xfrm_flowi_dport(struct flowi *fl)
476 port = fl->fl_ip_dport;
480 port = htons(fl->fl_icmp_code);
489 __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl)
491 return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) &&
492 addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) &&
493 !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) &&
494 !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) &&
495 (fl->proto == sel->proto || !sel->proto) &&
496 (fl->oif == sel->ifindex || !sel->ifindex);
500 __xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl)
502 return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) &&
503 addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) &&
504 !((xfrm_flowi_dport(fl) ^ sel->dport) & sel->dport_mask) &&
505 !((xfrm_flowi_sport(fl) ^ sel->sport) & sel->sport_mask) &&
506 (fl->proto == sel->proto || !sel->proto) &&
507 (fl->oif == sel->ifindex || !sel->ifindex);
511 xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
512 unsigned short family)
516 return __xfrm4_selector_match(sel, fl);
518 return __xfrm6_selector_match(sel, fl);
523 #ifdef CONFIG_SECURITY_NETWORK_XFRM
524 /* If neither has a context --> match
525 * Otherwise, both must have a context and the sids, doi, alg must match
527 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
529 return ((!s1 && !s2) ||
531 (s1->ctx_sid == s2->ctx_sid) &&
532 (s1->ctx_doi == s2->ctx_doi) &&
533 (s1->ctx_alg == s2->ctx_alg)));
536 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
542 /* A struct encoding bundle of transformations to apply to some set of flow.
544 * dst->child points to the next element of bundle.
545 * dst->xfrm points to an instanse of transformer.
547 * Due to unfortunate limitations of current routing cache, which we
548 * have no time to fix, it mirrors struct rtable and bound to the same
549 * routing key, including saddr,daddr. However, we can have many of
550 * bundles differing by session id. All the bundles grow from a parent
556 struct xfrm_dst *next;
557 struct dst_entry dst;
561 struct dst_entry *route;
562 u32 route_mtu_cached;
563 u32 child_mtu_cached;
568 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
570 dst_release(xdst->route);
571 if (likely(xdst->u.dst.xfrm))
572 xfrm_state_put(xdst->u.dst.xfrm);
575 extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
577 /* Decapsulation state, used by the input to store data during
578 * decapsulation procedure, to be used later (during the policy
581 struct xfrm_decap_state {
586 struct sec_decap_state {
587 struct xfrm_state *xvec;
588 struct xfrm_decap_state decap;
595 struct sec_decap_state x[XFRM_MAX_DEPTH];
598 static inline struct sec_path *
599 secpath_get(struct sec_path *sp)
602 atomic_inc(&sp->refcnt);
606 extern void __secpath_destroy(struct sec_path *sp);
609 secpath_put(struct sec_path *sp)
611 if (sp && atomic_dec_and_test(&sp->refcnt))
612 __secpath_destroy(sp);
615 extern struct sec_path *secpath_dup(struct sec_path *src);
618 secpath_reset(struct sk_buff *skb)
621 secpath_put(skb->sp);
627 __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
629 return (tmpl->saddr.a4 &&
630 tmpl->saddr.a4 != x->props.saddr.a4);
634 __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
636 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
637 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
641 xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family)
645 return __xfrm4_state_addr_cmp(tmpl, x);
647 return __xfrm6_state_addr_cmp(tmpl, x);
654 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
656 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
658 if (sk && sk->sk_policy[XFRM_POLICY_IN])
659 return __xfrm_policy_check(sk, dir, skb, family);
661 return (!xfrm_policy_list[dir] && !skb->sp) ||
662 (skb->dst->flags & DST_NOPOLICY) ||
663 __xfrm_policy_check(sk, dir, skb, family);
666 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
668 return xfrm_policy_check(sk, dir, skb, AF_INET);
671 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
673 return xfrm_policy_check(sk, dir, skb, AF_INET6);
676 extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family);
677 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
679 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
681 return !xfrm_policy_list[XFRM_POLICY_OUT] ||
682 (skb->dst->flags & DST_NOXFRM) ||
683 __xfrm_route_forward(skb, family);
686 static inline int xfrm4_route_forward(struct sk_buff *skb)
688 return xfrm_route_forward(skb, AF_INET);
691 static inline int xfrm6_route_forward(struct sk_buff *skb)
693 return xfrm_route_forward(skb, AF_INET6);
696 extern int __xfrm_sk_clone_policy(struct sock *sk);
698 static inline int xfrm_sk_clone_policy(struct sock *sk)
700 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
701 return __xfrm_sk_clone_policy(sk);
705 extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
707 static inline void xfrm_sk_free_policy(struct sock *sk)
709 if (unlikely(sk->sk_policy[0] != NULL)) {
710 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
711 sk->sk_policy[0] = NULL;
713 if (unlikely(sk->sk_policy[1] != NULL)) {
714 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
715 sk->sk_policy[1] = NULL;
721 static inline void xfrm_sk_free_policy(struct sock *sk) {}
722 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
723 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
724 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
725 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
729 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
733 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
740 xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family)
744 return (xfrm_address_t *)&fl->fl4_dst;
746 return (xfrm_address_t *)&fl->fl6_dst;
752 xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
756 return (xfrm_address_t *)&fl->fl4_src;
758 return (xfrm_address_t *)&fl->fl6_src;
763 static __inline__ int
764 __xfrm4_state_addr_check(struct xfrm_state *x,
765 xfrm_address_t *daddr, xfrm_address_t *saddr)
767 if (daddr->a4 == x->id.daddr.a4 &&
768 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
773 static __inline__ int
774 __xfrm6_state_addr_check(struct xfrm_state *x,
775 xfrm_address_t *daddr, xfrm_address_t *saddr)
777 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
778 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
779 ipv6_addr_any((struct in6_addr *)saddr) ||
780 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
785 static __inline__ int
786 xfrm_state_addr_check(struct xfrm_state *x,
787 xfrm_address_t *daddr, xfrm_address_t *saddr,
788 unsigned short family)
792 return __xfrm4_state_addr_check(x, daddr, saddr);
794 return __xfrm6_state_addr_check(x, daddr, saddr);
799 static inline int xfrm_state_kern(struct xfrm_state *x)
801 return atomic_read(&x->tunnel_users);
805 * xfrm algorithm information
807 struct xfrm_algo_auth_info {
812 struct xfrm_algo_encr_info {
817 struct xfrm_algo_comp_info {
821 struct xfrm_algo_desc {
825 struct xfrm_algo_auth_info auth;
826 struct xfrm_algo_encr_info encr;
827 struct xfrm_algo_comp_info comp;
829 struct sadb_alg desc;
832 /* XFRM tunnel handlers. */
834 int (*handler)(struct sk_buff *skb);
835 void (*err_handler)(struct sk_buff *skb, __u32 info);
838 struct xfrm6_tunnel {
839 int (*handler)(struct sk_buff **pskb);
840 void (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
841 int type, int code, int offset, __u32 info);
844 extern void xfrm_init(void);
845 extern void xfrm4_init(void);
846 extern void xfrm6_init(void);
847 extern void xfrm6_fini(void);
848 extern void xfrm_state_init(void);
849 extern void xfrm4_state_init(void);
850 extern void xfrm6_state_init(void);
851 extern void xfrm6_state_fini(void);
853 extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
854 extern struct xfrm_state *xfrm_state_alloc(void);
855 extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
856 struct flowi *fl, struct xfrm_tmpl *tmpl,
857 struct xfrm_policy *pol, int *err,
858 unsigned short family);
859 extern int xfrm_state_check_expire(struct xfrm_state *x);
860 extern void xfrm_state_insert(struct xfrm_state *x);
861 extern int xfrm_state_add(struct xfrm_state *x);
862 extern int xfrm_state_update(struct xfrm_state *x);
863 extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family);
864 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
865 extern int xfrm_state_delete(struct xfrm_state *x);
866 extern void xfrm_state_flush(u8 proto);
867 extern int xfrm_replay_check(struct xfrm_state *x, u32 seq);
868 extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq);
869 extern int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb);
870 extern int xfrm_state_mtu(struct xfrm_state *x, int mtu);
871 extern int xfrm_init_state(struct xfrm_state *x);
872 extern int xfrm4_rcv(struct sk_buff *skb);
873 extern int xfrm4_output(struct sk_buff *skb);
874 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler);
875 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler);
876 extern int xfrm6_rcv_spi(struct sk_buff **pskb, u32 spi);
877 extern int xfrm6_rcv(struct sk_buff **pskb);
878 extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler);
879 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler);
880 extern u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr);
881 extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr);
882 extern u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr);
883 extern int xfrm6_output(struct sk_buff *skb);
886 extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type);
887 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
888 extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
890 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
895 static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
897 /* should not happen */
901 static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
907 struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp);
908 extern int xfrm_policy_walk(int (*func)(struct xfrm_policy *, int, int, void*), void *);
909 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
910 struct xfrm_policy *xfrm_policy_bysel_ctx(int dir, struct xfrm_selector *sel,
911 struct xfrm_sec_ctx *ctx, int delete);
912 struct xfrm_policy *xfrm_policy_byid(int dir, u32 id, int delete);
913 void xfrm_policy_flush(void);
914 u32 xfrm_get_acqseq(void);
915 void xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
916 struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
917 xfrm_address_t *daddr, xfrm_address_t *saddr,
918 int create, unsigned short family);
919 extern void xfrm_policy_flush(void);
920 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
921 extern int xfrm_flush_bundles(void);
922 extern void xfrm_flush_all_bundles(void);
923 extern int xfrm_bundle_ok(struct xfrm_dst *xdst, struct flowi *fl, int family);
924 extern void xfrm_init_pmtu(struct dst_entry *dst);
926 extern wait_queue_head_t km_waitq;
927 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport);
928 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard);
930 extern void xfrm_input_init(void);
931 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq);
933 extern void xfrm_probe_algs(void);
934 extern int xfrm_count_auth_supported(void);
935 extern int xfrm_count_enc_supported(void);
936 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
937 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
938 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
939 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
940 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
941 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe);
942 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe);
943 extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe);
946 typedef void (icv_update_fn_t)(struct crypto_tfm *, struct scatterlist *, unsigned int);
948 extern void skb_icv_walk(const struct sk_buff *skb, struct crypto_tfm *tfm,
949 int offset, int len, icv_update_fn_t icv_update);
951 static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b,
957 return a->a4 - b->a4;
959 return ipv6_addr_cmp((struct in6_addr *)a,
960 (struct in6_addr *)b);
964 static inline int xfrm_policy_id2dir(u32 index)
969 #endif /* _NET_XFRM_H */