4 #include <linux/xfrm.h>
5 #include <linux/spinlock.h>
6 #include <linux/list.h>
7 #include <linux/skbuff.h>
8 #include <linux/netdevice.h>
9 #include <linux/crypto.h>
10 #include <linux/pfkeyv2.h>
11 #include <linux/in6.h>
15 #include <net/route.h>
17 #include <net/ip6_fib.h>
19 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
21 extern struct semaphore xfrm_cfg_sem;
23 /* Organization of SPD aka "XFRM rules"
24 ------------------------------------
27 - policy rule, struct xfrm_policy (=SPD entry)
28 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
29 - instance of a transformer, struct xfrm_state (=SA)
30 - template to clone xfrm_state, struct xfrm_tmpl
32 SPD is plain linear list of xfrm_policy rules, ordered by priority.
33 (To be compatible with existing pfkeyv2 implementations,
34 many rules with priority of 0x7fffffff are allowed to exist and
35 such rules are ordered in an unpredictable way, thanks to bsd folks.)
37 Lookup is plain linear search until the first match with selector.
39 If "action" is "block", then we prohibit the flow, otherwise:
40 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
41 policy entry has list of up to XFRM_MAX_DEPTH transformations,
42 described by templates xfrm_tmpl. Each template is resolved
43 to a complete xfrm_state (see below) and we pack bundle of transformations
44 to a dst_entry returned to requestor.
46 dst -. xfrm .-> xfrm_state #1
47 |---. child .-> dst -. xfrm .-> xfrm_state #2
48 |---. child .-> dst -. xfrm .-> xfrm_state #3
51 Bundles are cached at xrfm_policy struct (field ->bundles).
54 Resolution of xrfm_tmpl
55 -----------------------
57 1. ->mode Mode: transport or tunnel
58 2. ->id.proto Protocol: AH/ESP/IPCOMP
59 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
60 Q: allow to resolve security gateway?
61 4. ->id.spi If not zero, static SPI.
62 5. ->saddr Local tunnel endpoint, ignored for transport mode.
63 6. ->algos List of allowed algos. Plain bitmask now.
64 Q: ealgos, aalgos, calgos. What a mess...
65 7. ->share Sharing mode.
66 Q: how to implement private sharing mode? To add struct sock* to
69 Having this template we search through SAD searching for entries
70 with appropriate mode/proto/algo, permitted by selector.
71 If no appropriate entry found, it is requested from key manager.
74 Q: How to find all the bundles referring to a physical path for
75 PMTU discovery? Seems, dst should contain list of all parents...
76 and enter to infinite locking hierarchy disaster.
77 No! It is easier, we will not search for them, let them find us.
78 We add genid to each dst plus pointer to genid of raw IP route,
79 pmtu disc will update pmtu on raw IP route and increase its genid.
80 dst_check() will see this for top level and trigger resyncing
81 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
84 /* Full description of state of transformer. */
87 /* Note: bydst is re-used during gc */
88 struct list_head bydst;
89 struct list_head byspi;
95 struct xfrm_selector sel;
104 /* Parameters of this state. */
109 u8 aalgo, ealgo, calgo;
112 xfrm_address_t saddr;
117 struct xfrm_lifetime_cfg lft;
119 /* Data for transformer */
120 struct xfrm_algo *aalg;
121 struct xfrm_algo *ealg;
122 struct xfrm_algo *calg;
124 /* Data for encapsulator */
125 struct xfrm_encap_tmpl *encap;
127 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
128 struct xfrm_state *tunnel;
130 /* If a tunnel, number of users + 1 */
131 atomic_t tunnel_users;
133 /* State for replay detection */
134 struct xfrm_replay_state replay;
137 struct xfrm_stats stats;
139 struct xfrm_lifetime_cur curlft;
140 struct timer_list timer;
142 /* Reference to data common to all the instances of this
144 struct xfrm_type *type;
146 /* Private data of this transformer, format is opaque,
147 * interpreted by xfrm_type methods. */
162 struct xfrm_policy_afinfo {
163 unsigned short family;
165 struct xfrm_type_map *type_map;
166 struct dst_ops *dst_ops;
167 void (*garbage_collect)(void);
168 int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl);
169 struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy);
170 int (*bundle_create)(struct xfrm_policy *policy,
171 struct xfrm_state **xfrm,
174 struct dst_entry **dst_p);
175 void (*decode_session)(struct sk_buff *skb,
179 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
180 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
181 extern struct xfrm_policy_afinfo *xfrm_policy_get_afinfo(unsigned short family);
182 extern void xfrm_policy_put_afinfo(struct xfrm_policy_afinfo *afinfo);
184 #define XFRM_ACQ_EXPIRES 30
187 struct xfrm_state_afinfo {
188 unsigned short family;
190 struct list_head *state_bydst;
191 struct list_head *state_byspi;
192 void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl,
193 struct xfrm_tmpl *tmpl,
194 xfrm_address_t *daddr, xfrm_address_t *saddr);
195 struct xfrm_state *(*state_lookup)(xfrm_address_t *daddr, u32 spi, u8 proto);
196 struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto,
197 xfrm_address_t *daddr, xfrm_address_t *saddr,
201 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
202 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
203 extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family);
204 extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
206 extern void xfrm_state_delete_tunnel(struct xfrm_state *x);
208 struct xfrm_decap_state;
212 struct module *owner;
215 int (*init_state)(struct xfrm_state *x, void *args);
216 void (*destructor)(struct xfrm_state *);
217 int (*input)(struct xfrm_state *, struct xfrm_decap_state *, struct sk_buff *skb);
218 int (*post_input)(struct xfrm_state *, struct xfrm_decap_state *, struct sk_buff *skb);
219 int (*output)(struct sk_buff **pskb);
220 /* Estimate maximal size of result of transformation of a dgram */
221 u32 (*get_max_size)(struct xfrm_state *, int size);
224 struct xfrm_type_map {
226 struct xfrm_type *map[256];
229 extern int xfrm_register_type(struct xfrm_type *type, unsigned short family);
230 extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family);
231 extern struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family);
232 extern void xfrm_put_type(struct xfrm_type *type);
236 /* id in template is interpreted as:
237 * daddr - destination of tunnel, may be zero for transport mode.
238 * spi - zero to acquire spi. Not zero if spi is static, then
239 * daddr must be fixed too.
240 * proto - AH/ESP/IPCOMP
244 /* Source address of tunnel. Ignored, if it is not a tunnel. */
245 xfrm_address_t saddr;
249 /* Mode: transport/tunnel */
252 /* Sharing mode: unique, this session only, this user only etc. */
255 /* May skip this transfomration if no SA is found */
258 /* Bit mask of algos allowed for acquisition */
264 #define XFRM_MAX_DEPTH 4
268 struct xfrm_policy *next;
269 struct list_head list;
271 /* This lock only affects elements except for entry. */
274 struct timer_list timer;
278 struct xfrm_selector selector;
279 struct xfrm_lifetime_cfg lft;
280 struct xfrm_lifetime_cur curlft;
281 struct dst_entry *bundles;
287 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
290 #define XFRM_KM_TIMEOUT 30
294 struct list_head list;
296 int (*notify)(struct xfrm_state *x, int event);
297 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir);
298 struct xfrm_policy *(*compile_policy)(u16 family, int opt, u8 *data, int len, int *dir);
299 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport);
300 int (*notify_policy)(struct xfrm_policy *x, int dir, int event);
303 extern int xfrm_register_km(struct xfrm_mgr *km);
304 extern int xfrm_unregister_km(struct xfrm_mgr *km);
307 #define XFRM_FLOWCACHE_HASH_SIZE 1024
309 static inline u32 __flow_hash4(struct flowi *fl)
311 u32 hash = fl->fl4_src ^ fl->fl_ip_sport;
313 hash = ((hash & 0xF0F0F0F0) >> 4) | ((hash & 0x0F0F0F0F) << 4);
315 hash ^= fl->fl4_dst ^ fl->fl_ip_dport;
316 hash ^= (hash >> 10);
317 hash ^= (hash >> 20);
318 return hash & (XFRM_FLOWCACHE_HASH_SIZE-1);
321 static inline u32 __flow_hash6(struct flowi *fl)
323 u32 hash = fl->fl6_src.s6_addr32[2] ^
324 fl->fl6_src.s6_addr32[3] ^
327 hash = ((hash & 0xF0F0F0F0) >> 4) | ((hash & 0x0F0F0F0F) << 4);
329 hash ^= fl->fl6_dst.s6_addr32[2] ^
330 fl->fl6_dst.s6_addr32[3] ^
332 hash ^= (hash >> 10);
333 hash ^= (hash >> 20);
334 return hash & (XFRM_FLOWCACHE_HASH_SIZE-1);
337 static inline u32 flow_hash(struct flowi *fl, unsigned short family)
341 return __flow_hash4(fl);
343 return __flow_hash6(fl);
348 extern struct xfrm_policy *xfrm_policy_list[XFRM_POLICY_MAX*2];
350 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
352 if (likely(policy != NULL))
353 atomic_inc(&policy->refcnt);
356 extern void __xfrm_policy_destroy(struct xfrm_policy *policy);
358 static inline void xfrm_pol_put(struct xfrm_policy *policy)
360 if (atomic_dec_and_test(&policy->refcnt))
361 __xfrm_policy_destroy(policy);
364 #define XFRM_DST_HSIZE 1024
367 unsigned __xfrm4_dst_hash(xfrm_address_t *addr)
371 h = (h ^ (h>>16)) % XFRM_DST_HSIZE;
376 unsigned __xfrm6_dst_hash(xfrm_address_t *addr)
379 h = ntohl(addr->a6[2]^addr->a6[3]);
380 h = (h ^ (h>>16)) % XFRM_DST_HSIZE;
385 unsigned xfrm_dst_hash(xfrm_address_t *addr, unsigned short family)
389 return __xfrm4_dst_hash(addr);
391 return __xfrm6_dst_hash(addr);
397 unsigned __xfrm4_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
400 h = ntohl(addr->a4^spi^proto);
401 h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE;
406 unsigned __xfrm6_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto)
409 h = ntohl(addr->a6[2]^addr->a6[3]^spi^proto);
410 h = (h ^ (h>>10) ^ (h>>20)) % XFRM_DST_HSIZE;
415 unsigned xfrm_spi_hash(xfrm_address_t *addr, u32 spi, u8 proto, unsigned short family)
419 return __xfrm4_spi_hash(addr, spi, proto);
421 return __xfrm6_spi_hash(addr, spi, proto);
426 extern void __xfrm_state_destroy(struct xfrm_state *);
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 __xfrm4_selector_match(struct xfrm_selector *sel, struct flowi *fl)
468 return addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) &&
469 addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) &&
470 !((fl->fl_ip_dport^sel->dport)&sel->dport_mask) &&
471 !((fl->fl_ip_sport^sel->sport)&sel->sport_mask) &&
472 (fl->proto == sel->proto || !sel->proto) &&
473 (fl->oif == sel->ifindex || !sel->ifindex);
477 __xfrm6_selector_match(struct xfrm_selector *sel, struct flowi *fl)
479 return addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) &&
480 addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) &&
481 !((fl->fl_ip_dport^sel->dport)&sel->dport_mask) &&
482 !((fl->fl_ip_sport^sel->sport)&sel->sport_mask) &&
483 (fl->proto == sel->proto || !sel->proto) &&
484 (fl->oif == sel->ifindex || !sel->ifindex);
488 xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
489 unsigned short family)
493 return __xfrm4_selector_match(sel, fl);
495 return __xfrm6_selector_match(sel, fl);
500 /* placeholder until xfrm6_tunnel.c is written */
501 static inline int xfrm6_tunnel_check_size(struct sk_buff *skb)
504 /* A struct encoding bundle of transformations to apply to some set of flow.
506 * dst->child points to the next element of bundle.
507 * dst->xfrm points to an instanse of transformer.
509 * Due to unfortunate limitations of current routing cache, which we
510 * have no time to fix, it mirrors struct rtable and bound to the same
511 * routing key, including saddr,daddr. However, we can have many of
512 * bundles differing by session id. All the bundles grow from a parent
518 struct xfrm_dst *next;
519 struct dst_entry dst;
525 /* Decapsulation state, used by the input to store data during
526 * decapsulation procedure, to be used later (during the policy
529 struct xfrm_decap_state {
534 struct sec_decap_state {
535 struct xfrm_state *xvec;
536 struct xfrm_decap_state decap;
543 struct sec_decap_state x[XFRM_MAX_DEPTH];
546 static inline struct sec_path *
547 secpath_get(struct sec_path *sp)
550 atomic_inc(&sp->refcnt);
554 extern void __secpath_destroy(struct sec_path *sp);
557 secpath_put(struct sec_path *sp)
559 if (sp && atomic_dec_and_test(&sp->refcnt))
560 __secpath_destroy(sp);
563 extern struct sec_path *secpath_dup(struct sec_path *src);
566 secpath_reset(struct sk_buff *skb)
569 secpath_put(skb->sp);
575 __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
577 return (tmpl->saddr.a4 &&
578 tmpl->saddr.a4 != x->props.saddr.a4);
582 __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x)
584 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
585 ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
589 xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family)
593 return __xfrm4_state_addr_cmp(tmpl, x);
595 return __xfrm6_state_addr_cmp(tmpl, x);
602 extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family);
604 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
606 if (sk && sk->sk_policy[XFRM_POLICY_IN])
607 return __xfrm_policy_check(sk, dir, skb, family);
609 return !xfrm_policy_list[dir] ||
610 (skb->dst->flags & DST_NOPOLICY) ||
611 __xfrm_policy_check(sk, dir, skb, family);
614 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
616 return xfrm_policy_check(sk, dir, skb, AF_INET);
619 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
621 return xfrm_policy_check(sk, dir, skb, AF_INET6);
625 extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
627 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
629 return !xfrm_policy_list[XFRM_POLICY_OUT] ||
630 (skb->dst->flags & DST_NOXFRM) ||
631 __xfrm_route_forward(skb, family);
634 static inline int xfrm4_route_forward(struct sk_buff *skb)
636 return xfrm_route_forward(skb, AF_INET);
639 static inline int xfrm6_route_forward(struct sk_buff *skb)
641 return xfrm_route_forward(skb, AF_INET6);
644 extern int __xfrm_sk_clone_policy(struct sock *sk);
646 static inline int xfrm_sk_clone_policy(struct sock *sk)
648 if (unlikely(sk->sk_policy[0] || sk->sk_policy[1]))
649 return __xfrm_sk_clone_policy(sk);
653 extern void xfrm_policy_delete(struct xfrm_policy *pol, int dir);
655 static inline void xfrm_sk_free_policy(struct sock *sk)
657 if (unlikely(sk->sk_policy[0] != NULL)) {
658 xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX);
659 sk->sk_policy[0] = NULL;
661 if (unlikely(sk->sk_policy[1] != NULL)) {
662 xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1);
663 sk->sk_policy[1] = NULL;
669 static inline void xfrm_sk_free_policy(struct sock *sk) {}
670 static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; }
671 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
672 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
673 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
677 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
681 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
688 xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family)
692 return (xfrm_address_t *)&fl->fl4_dst;
694 return (xfrm_address_t *)&fl->fl6_dst;
700 xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family)
704 return (xfrm_address_t *)&fl->fl4_src;
706 return (xfrm_address_t *)&fl->fl6_src;
711 static __inline__ int
712 __xfrm4_state_addr_check(struct xfrm_state *x,
713 xfrm_address_t *daddr, xfrm_address_t *saddr)
715 if (daddr->a4 == x->id.daddr.a4 &&
716 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
721 static __inline__ int
722 __xfrm6_state_addr_check(struct xfrm_state *x,
723 xfrm_address_t *daddr, xfrm_address_t *saddr)
725 if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
726 (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)||
727 ipv6_addr_any((struct in6_addr *)saddr) ||
728 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
733 static __inline__ int
734 xfrm_state_addr_check(struct xfrm_state *x,
735 xfrm_address_t *daddr, xfrm_address_t *saddr,
736 unsigned short family)
740 return __xfrm4_state_addr_check(x, daddr, saddr);
742 return __xfrm6_state_addr_check(x, daddr, saddr);
747 static inline int xfrm_state_kern(struct xfrm_state *x)
749 return atomic_read(&x->tunnel_users);
753 * xfrm algorithm information
755 struct xfrm_algo_auth_info {
760 struct xfrm_algo_encr_info {
765 struct xfrm_algo_comp_info {
769 struct xfrm_algo_desc {
773 struct xfrm_algo_auth_info auth;
774 struct xfrm_algo_encr_info encr;
775 struct xfrm_algo_comp_info comp;
777 struct sadb_alg desc;
780 /* XFRM tunnel handlers. */
782 int (*handler)(struct sk_buff *skb);
783 void (*err_handler)(struct sk_buff *skb, void *info);
786 extern void xfrm_init(void);
787 extern void xfrm4_init(void);
788 extern void xfrm4_fini(void);
789 extern void xfrm6_init(void);
790 extern void xfrm6_fini(void);
791 extern void xfrm_state_init(void);
792 extern void xfrm4_state_init(void);
793 extern void xfrm4_state_fini(void);
794 extern void xfrm6_state_init(void);
795 extern void xfrm6_state_fini(void);
797 extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
798 extern struct xfrm_state *xfrm_state_alloc(void);
799 extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
800 struct flowi *fl, struct xfrm_tmpl *tmpl,
801 struct xfrm_policy *pol, int *err,
802 unsigned short family);
803 extern int xfrm_state_check_expire(struct xfrm_state *x);
804 extern void xfrm_state_insert(struct xfrm_state *x);
805 extern int xfrm_state_add(struct xfrm_state *x);
806 extern int xfrm_state_update(struct xfrm_state *x);
807 extern int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb);
808 extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto, unsigned short family);
809 extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq);
810 extern void xfrm_state_delete(struct xfrm_state *x);
811 extern void xfrm_state_flush(u8 proto);
812 extern int xfrm_replay_check(struct xfrm_state *x, u32 seq);
813 extern void xfrm_replay_advance(struct xfrm_state *x, u32 seq);
814 extern int xfrm_check_selectors(struct xfrm_state **x, int n, struct flowi *fl);
815 extern int xfrm_check_output(struct xfrm_state *x, struct sk_buff *skb, unsigned short family);
816 extern int xfrm4_rcv(struct sk_buff *skb);
817 extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler);
818 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler);
819 extern int xfrm4_tunnel_check_size(struct sk_buff *skb);
820 extern int xfrm6_rcv(struct sk_buff **pskb, unsigned int *nhoffp);
823 extern int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type);
824 extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen);
825 extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family);
827 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
832 static inline int xfrm4_rcv_encap(struct sk_buff *skb, __u16 encap_type)
834 /* should not happen */
838 static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family)
844 void xfrm_policy_init(void);
845 void xfrm4_policy_init(void);
846 void xfrm6_policy_init(void);
847 struct xfrm_policy *xfrm_policy_alloc(int gfp);
848 extern int xfrm_policy_walk(int (*func)(struct xfrm_policy *, int, int, void*), void *);
849 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
850 struct xfrm_policy *xfrm_policy_bysel(int dir, struct xfrm_selector *sel,
852 struct xfrm_policy *xfrm_policy_byid(int dir, u32 id, int delete);
853 void xfrm_policy_flush(void);
854 u32 xfrm_get_acqseq(void);
855 void xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
856 struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
857 xfrm_address_t *daddr, xfrm_address_t *saddr,
858 int create, unsigned short family);
859 extern void xfrm_policy_flush(void);
860 extern void xfrm_policy_kill(struct xfrm_policy *);
861 extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
862 extern struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struct flowi *fl);
863 extern int xfrm_flush_bundles(void);
865 extern wait_queue_head_t km_waitq;
866 extern void km_state_expired(struct xfrm_state *x, int hard);
867 extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *pol);
868 extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport);
869 extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard);
871 extern void xfrm_input_init(void);
872 extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, u32 *spi, u32 *seq);
874 extern void xfrm_probe_algs(void);
875 extern int xfrm_count_auth_supported(void);
876 extern int xfrm_count_enc_supported(void);
877 extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
878 extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
879 extern struct xfrm_algo_desc *xfrm_calg_get_byidx(unsigned int idx);
880 extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
881 extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
882 extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
883 extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name);
884 extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name);
885 extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name);
888 typedef void (icv_update_fn_t)(struct crypto_tfm *, struct scatterlist *, unsigned int);
890 extern void skb_icv_walk(const struct sk_buff *skb, struct crypto_tfm *tfm,
891 int offset, int len, icv_update_fn_t icv_update);
893 #endif /* _NET_XFRM_H */