4 #include <linux/compiler.h>
5 #include <linux/xfrm.h>
6 #include <linux/spinlock.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
9 #include <linux/socket.h>
10 #include <linux/pfkeyv2.h>
11 #include <linux/ipsec.h>
12 #include <linux/in6.h>
13 #include <linux/mutex.h>
14 #include <linux/audit.h>
15 #include <linux/slab.h>
20 #include <net/route.h>
22 #include <net/ip6_fib.h>
25 #include <linux/interrupt.h>
27 #ifdef CONFIG_XFRM_STATISTICS
31 #define XFRM_PROTO_ESP 50
32 #define XFRM_PROTO_AH 51
33 #define XFRM_PROTO_COMP 108
34 #define XFRM_PROTO_IPIP 4
35 #define XFRM_PROTO_IPV6 41
36 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
39 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
40 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
41 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
43 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
46 #ifdef CONFIG_XFRM_STATISTICS
47 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
49 #define XFRM_INC_STATS(net, field) ((void)(net))
53 /* Organization of SPD aka "XFRM rules"
54 ------------------------------------
57 - policy rule, struct xfrm_policy (=SPD entry)
58 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
59 - instance of a transformer, struct xfrm_state (=SA)
60 - template to clone xfrm_state, struct xfrm_tmpl
62 SPD is plain linear list of xfrm_policy rules, ordered by priority.
63 (To be compatible with existing pfkeyv2 implementations,
64 many rules with priority of 0x7fffffff are allowed to exist and
65 such rules are ordered in an unpredictable way, thanks to bsd folks.)
67 Lookup is plain linear search until the first match with selector.
69 If "action" is "block", then we prohibit the flow, otherwise:
70 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
71 policy entry has list of up to XFRM_MAX_DEPTH transformations,
72 described by templates xfrm_tmpl. Each template is resolved
73 to a complete xfrm_state (see below) and we pack bundle of transformations
74 to a dst_entry returned to requestor.
76 dst -. xfrm .-> xfrm_state #1
77 |---. child .-> dst -. xfrm .-> xfrm_state #2
78 |---. child .-> dst -. xfrm .-> xfrm_state #3
81 Bundles are cached at xrfm_policy struct (field ->bundles).
84 Resolution of xrfm_tmpl
85 -----------------------
87 1. ->mode Mode: transport or tunnel
88 2. ->id.proto Protocol: AH/ESP/IPCOMP
89 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
90 Q: allow to resolve security gateway?
91 4. ->id.spi If not zero, static SPI.
92 5. ->saddr Local tunnel endpoint, ignored for transport mode.
93 6. ->algos List of allowed algos. Plain bitmask now.
94 Q: ealgos, aalgos, calgos. What a mess...
95 7. ->share Sharing mode.
96 Q: how to implement private sharing mode? To add struct sock* to
99 Having this template we search through SAD searching for entries
100 with appropriate mode/proto/algo, permitted by selector.
101 If no appropriate entry found, it is requested from key manager.
104 Q: How to find all the bundles referring to a physical path for
105 PMTU discovery? Seems, dst should contain list of all parents...
106 and enter to infinite locking hierarchy disaster.
107 No! It is easier, we will not search for them, let them find us.
108 We add genid to each dst plus pointer to genid of raw IP route,
109 pmtu disc will update pmtu on raw IP route and increase its genid.
110 dst_check() will see this for top level and trigger resyncing
111 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
114 struct xfrm_state_walk {
115 struct list_head all;
120 struct xfrm_address_filter *filter;
123 /* Full description of state of transformer. */
125 possible_net_t xs_net;
127 struct hlist_node gclist;
128 struct hlist_node bydst;
130 struct hlist_node bysrc;
131 struct hlist_node byspi;
137 struct xfrm_selector sel;
138 struct xfrm_mark mark;
143 /* Key manager bits */
144 struct xfrm_state_walk km;
146 /* Parameters of this state. */
151 u8 aalgo, ealgo, calgo;
154 xfrm_address_t saddr;
160 struct xfrm_lifetime_cfg lft;
162 /* Data for transformer */
163 struct xfrm_algo_auth *aalg;
164 struct xfrm_algo *ealg;
165 struct xfrm_algo *calg;
166 struct xfrm_algo_aead *aead;
169 /* Data for encapsulator */
170 struct xfrm_encap_tmpl *encap;
172 /* Data for care-of address */
173 xfrm_address_t *coaddr;
175 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
176 struct xfrm_state *tunnel;
178 /* If a tunnel, number of users + 1 */
179 atomic_t tunnel_users;
181 /* State for replay detection */
182 struct xfrm_replay_state replay;
183 struct xfrm_replay_state_esn *replay_esn;
185 /* Replay detection state at the time we sent the last notification */
186 struct xfrm_replay_state preplay;
187 struct xfrm_replay_state_esn *preplay_esn;
189 /* The functions for replay detection. */
190 const struct xfrm_replay *repl;
192 /* internal flag that only holds state for delayed aevent at the
197 /* Replay detection notification settings */
201 /* Replay detection notification timer */
202 struct timer_list rtimer;
205 struct xfrm_stats stats;
207 struct xfrm_lifetime_cur curlft;
208 struct tasklet_hrtimer mtimer;
210 /* used to fix curlft->add_time when changing date */
214 unsigned long lastused;
216 /* Reference to data common to all the instances of this
218 const struct xfrm_type *type;
219 struct xfrm_mode *inner_mode;
220 struct xfrm_mode *inner_mode_iaf;
221 struct xfrm_mode *outer_mode;
223 /* Security context */
224 struct xfrm_sec_ctx *security;
226 /* Private data of this transformer, format is opaque,
227 * interpreted by xfrm_type methods. */
231 static inline struct net *xs_net(struct xfrm_state *x)
233 return read_pnet(&x->xs_net);
236 /* xflags - make enum if more show up */
237 #define XFRM_TIME_DEFER 1
238 #define XFRM_SOFT_EXPIRE 2
249 /* callback structure passed from either netlink or pfkey */
266 void (*advance)(struct xfrm_state *x, __be32 net_seq);
267 int (*check)(struct xfrm_state *x,
270 int (*recheck)(struct xfrm_state *x,
273 void (*notify)(struct xfrm_state *x, int event);
274 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
280 struct xfrm_policy_afinfo {
281 unsigned short family;
282 struct dst_ops *dst_ops;
283 void (*garbage_collect)(struct net *net);
284 struct dst_entry *(*dst_lookup)(struct net *net,
286 const xfrm_address_t *saddr,
287 const xfrm_address_t *daddr);
288 int (*get_saddr)(struct net *net, int oif,
289 xfrm_address_t *saddr,
290 xfrm_address_t *daddr);
291 void (*decode_session)(struct sk_buff *skb,
294 int (*get_tos)(const struct flowi *fl);
295 int (*init_path)(struct xfrm_dst *path,
296 struct dst_entry *dst,
298 int (*fill_dst)(struct xfrm_dst *xdst,
299 struct net_device *dev,
300 const struct flowi *fl);
301 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
304 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
305 int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
306 void km_policy_notify(struct xfrm_policy *xp, int dir,
307 const struct km_event *c);
308 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
311 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
312 struct xfrm_policy *pol);
313 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
314 int __xfrm_state_delete(struct xfrm_state *x);
316 struct xfrm_state_afinfo {
320 struct module *owner;
321 const struct xfrm_type *type_map[IPPROTO_MAX];
322 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
323 int (*init_flags)(struct xfrm_state *x);
324 void (*init_tempsel)(struct xfrm_selector *sel,
325 const struct flowi *fl);
326 void (*init_temprop)(struct xfrm_state *x,
327 const struct xfrm_tmpl *tmpl,
328 const xfrm_address_t *daddr,
329 const xfrm_address_t *saddr);
330 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
331 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
332 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
333 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
334 int (*extract_input)(struct xfrm_state *x,
335 struct sk_buff *skb);
336 int (*extract_output)(struct xfrm_state *x,
337 struct sk_buff *skb);
338 int (*transport_finish)(struct sk_buff *skb,
340 void (*local_error)(struct sk_buff *skb, u32 mtu);
343 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
344 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
345 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
347 struct xfrm_input_afinfo {
349 struct module *owner;
350 int (*callback)(struct sk_buff *skb, u8 protocol,
354 int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
355 int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
357 void xfrm_state_delete_tunnel(struct xfrm_state *x);
361 struct module *owner;
364 #define XFRM_TYPE_NON_FRAGMENT 1
365 #define XFRM_TYPE_REPLAY_PROT 2
366 #define XFRM_TYPE_LOCAL_COADDR 4
367 #define XFRM_TYPE_REMOTE_COADDR 8
369 int (*init_state)(struct xfrm_state *x);
370 void (*destructor)(struct xfrm_state *);
371 int (*input)(struct xfrm_state *, struct sk_buff *skb);
372 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
373 int (*reject)(struct xfrm_state *, struct sk_buff *,
374 const struct flowi *);
375 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
376 /* Estimate maximal size of result of transformation of a dgram */
377 u32 (*get_mtu)(struct xfrm_state *, int size);
380 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
381 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
385 * Remove encapsulation header.
387 * The IP header will be moved over the top of the encapsulation
390 * On entry, the transport header shall point to where the IP header
391 * should be and the network header shall be set to where the IP
392 * header currently is. skb->data shall point to the start of the
395 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
398 * This is the actual input entry point.
400 * For transport mode and equivalent this would be identical to
401 * input2 (which does not need to be set). While tunnel mode
402 * and equivalent would set this to the tunnel encapsulation function
403 * xfrm4_prepare_input that would in turn call input2.
405 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
408 * Add encapsulation header.
410 * On exit, the transport header will be set to the start of the
411 * encapsulation header to be filled in by x->type->output and
412 * the mac header will be set to the nextheader (protocol for
413 * IPv4) field of the extension header directly preceding the
414 * encapsulation header, or in its absence, that of the top IP
415 * header. The value of the network header will always point
416 * to the top IP header while skb->data will point to the payload.
418 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
421 * This is the actual output entry point.
423 * For transport mode and equivalent this would be identical to
424 * output2 (which does not need to be set). While tunnel mode
425 * and equivalent would set this to a tunnel encapsulation function
426 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
429 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
431 struct xfrm_state_afinfo *afinfo;
432 struct module *owner;
437 /* Flags for xfrm_mode. */
439 XFRM_MODE_FLAG_TUNNEL = 1,
442 int xfrm_register_mode(struct xfrm_mode *mode, int family);
443 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
445 static inline int xfrm_af2proto(unsigned int family)
457 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
459 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
460 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
461 return x->inner_mode;
463 return x->inner_mode_iaf;
467 /* id in template is interpreted as:
468 * daddr - destination of tunnel, may be zero for transport mode.
469 * spi - zero to acquire spi. Not zero if spi is static, then
470 * daddr must be fixed too.
471 * proto - AH/ESP/IPCOMP
475 /* Source address of tunnel. Ignored, if it is not a tunnel. */
476 xfrm_address_t saddr;
478 unsigned short encap_family;
482 /* Mode: transport, tunnel etc. */
485 /* Sharing mode: unique, this session only, this user only etc. */
488 /* May skip this transfomration if no SA is found */
491 /* Skip aalgos/ealgos/calgos checks. */
494 /* Bit mask of algos allowed for acquisition */
500 #define XFRM_MAX_DEPTH 6
502 struct xfrm_policy_walk_entry {
503 struct list_head all;
507 struct xfrm_policy_walk {
508 struct xfrm_policy_walk_entry walk;
513 struct xfrm_policy_queue {
514 struct sk_buff_head hold_queue;
515 struct timer_list hold_timer;
516 unsigned long timeout;
520 possible_net_t xp_net;
521 struct hlist_node bydst;
522 struct hlist_node byidx;
524 /* This lock only affects elements except for entry. */
527 struct timer_list timer;
529 struct flow_cache_object flo;
533 struct xfrm_mark mark;
534 struct xfrm_selector selector;
535 struct xfrm_lifetime_cfg lft;
536 struct xfrm_lifetime_cur curlft;
537 struct xfrm_policy_walk_entry walk;
538 struct xfrm_policy_queue polq;
544 struct xfrm_sec_ctx *security;
545 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
549 static inline struct net *xp_net(const struct xfrm_policy *xp)
551 return read_pnet(&xp->xp_net);
554 struct xfrm_kmaddress {
555 xfrm_address_t local;
556 xfrm_address_t remote;
561 struct xfrm_migrate {
562 xfrm_address_t old_daddr;
563 xfrm_address_t old_saddr;
564 xfrm_address_t new_daddr;
565 xfrm_address_t new_saddr;
574 #define XFRM_KM_TIMEOUT 30
576 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
577 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
579 /* default aevent timeout in units of 100ms */
580 #define XFRM_AE_ETIME 10
581 /* Async Event timer multiplier */
582 #define XFRM_AE_ETH_M 10
583 /* default seq threshold size */
584 #define XFRM_AE_SEQT_SIZE 2
587 struct list_head list;
589 int (*notify)(struct xfrm_state *x, const struct km_event *c);
590 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
591 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
592 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
593 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
594 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
595 int (*migrate)(const struct xfrm_selector *sel,
597 const struct xfrm_migrate *m,
599 const struct xfrm_kmaddress *k);
600 bool (*is_alive)(const struct km_event *c);
603 int xfrm_register_km(struct xfrm_mgr *km);
604 int xfrm_unregister_km(struct xfrm_mgr *km);
606 struct xfrm_tunnel_skb_cb {
608 struct inet_skb_parm h4;
609 struct inet6_skb_parm h6;
613 struct ip_tunnel *ip4;
618 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
621 * This structure is used for the duration where packets are being
622 * transformed by IPsec. As soon as the packet leaves IPsec the
623 * area beyond the generic IP part may be overwritten.
626 struct xfrm_tunnel_skb_cb header;
628 /* Sequence number for replay protection. */
641 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
644 * This structure is used by the afinfo prepare_input/prepare_output functions
645 * to transmit header information to the mode input/output functions.
647 struct xfrm_mode_skb_cb {
648 struct xfrm_tunnel_skb_cb header;
650 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
654 /* IP header length (excluding options or extension headers). */
657 /* TOS for IPv4, class for IPv6. */
660 /* TTL for IPv4, hop limitfor IPv6. */
663 /* Protocol for IPv4, NH for IPv6. */
666 /* Option length for IPv4, zero for IPv6. */
669 /* Used by IPv6 only, zero for IPv4. */
673 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
676 * This structure is used by the input processing to locate the SPI and
677 * related information.
679 struct xfrm_spi_skb_cb {
680 struct xfrm_tunnel_skb_cb header;
682 unsigned int daddroff;
686 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
688 #ifdef CONFIG_AUDITSYSCALL
689 static inline struct audit_buffer *xfrm_audit_start(const char *op)
691 struct audit_buffer *audit_buf = NULL;
693 if (audit_enabled == 0)
695 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
696 AUDIT_MAC_IPSEC_EVENT);
697 if (audit_buf == NULL)
699 audit_log_format(audit_buf, "op=%s", op);
703 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
704 struct audit_buffer *audit_buf)
706 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
707 audit_get_loginuid(current) :
709 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
712 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
713 audit_log_task_context(audit_buf);
716 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
717 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
719 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
720 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
721 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
722 struct sk_buff *skb);
723 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
725 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
726 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
728 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
732 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
737 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
742 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
747 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
752 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
757 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
758 struct sk_buff *skb, __be32 net_seq)
762 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
767 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
768 __be32 net_spi, __be32 net_seq)
772 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
773 struct sk_buff *skb, u8 proto)
776 #endif /* CONFIG_AUDITSYSCALL */
778 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
780 if (likely(policy != NULL))
781 atomic_inc(&policy->refcnt);
784 void xfrm_policy_destroy(struct xfrm_policy *policy);
786 static inline void xfrm_pol_put(struct xfrm_policy *policy)
788 if (atomic_dec_and_test(&policy->refcnt))
789 xfrm_policy_destroy(policy);
792 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
795 for (i = npols - 1; i >= 0; --i)
796 xfrm_pol_put(pols[i]);
799 void __xfrm_state_destroy(struct xfrm_state *);
801 static inline void __xfrm_state_put(struct xfrm_state *x)
803 atomic_dec(&x->refcnt);
806 static inline void xfrm_state_put(struct xfrm_state *x)
808 if (atomic_dec_and_test(&x->refcnt))
809 __xfrm_state_destroy(x);
812 static inline void xfrm_state_hold(struct xfrm_state *x)
814 atomic_inc(&x->refcnt);
817 static inline bool addr_match(const void *token1, const void *token2,
820 const __be32 *a1 = token1;
821 const __be32 *a2 = token2;
825 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
826 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
829 if (memcmp(a1, a2, pdw << 2))
835 mask = htonl((0xffffffff) << (32 - pbi));
837 if ((a1[pdw] ^ a2[pdw]) & mask)
844 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
846 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
849 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
853 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
856 switch(fl->flowi_proto) {
859 case IPPROTO_UDPLITE:
861 port = uli->ports.sport;
865 port = htons(uli->icmpt.type);
868 port = htons(uli->mht.type);
871 port = htons(ntohl(uli->gre_key) >> 16);
880 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
883 switch(fl->flowi_proto) {
886 case IPPROTO_UDPLITE:
888 port = uli->ports.dport;
892 port = htons(uli->icmpt.code);
895 port = htons(ntohl(uli->gre_key) & 0xffff);
903 bool xfrm_selector_match(const struct xfrm_selector *sel,
904 const struct flowi *fl, unsigned short family);
906 #ifdef CONFIG_SECURITY_NETWORK_XFRM
907 /* If neither has a context --> match
908 * Otherwise, both must have a context and the sids, doi, alg must match
910 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
912 return ((!s1 && !s2) ||
914 (s1->ctx_sid == s2->ctx_sid) &&
915 (s1->ctx_doi == s2->ctx_doi) &&
916 (s1->ctx_alg == s2->ctx_alg)));
919 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
925 /* A struct encoding bundle of transformations to apply to some set of flow.
927 * dst->child points to the next element of bundle.
928 * dst->xfrm points to an instanse of transformer.
930 * Due to unfortunate limitations of current routing cache, which we
931 * have no time to fix, it mirrors struct rtable and bound to the same
932 * routing key, including saddr,daddr. However, we can have many of
933 * bundles differing by session id. All the bundles grow from a parent
938 struct dst_entry dst;
942 struct dst_entry *route;
943 struct flow_cache_object flo;
944 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
945 int num_pols, num_xfrms;
946 #ifdef CONFIG_XFRM_SUB_POLICY
947 struct flowi *origin;
948 struct xfrm_selector *partner;
952 u32 route_mtu_cached;
953 u32 child_mtu_cached;
959 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
961 xfrm_pols_put(xdst->pols, xdst->num_pols);
962 dst_release(xdst->route);
963 if (likely(xdst->u.dst.xfrm))
964 xfrm_state_put(xdst->u.dst.xfrm);
965 #ifdef CONFIG_XFRM_SUB_POLICY
968 kfree(xdst->partner);
969 xdst->partner = NULL;
974 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
979 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
982 static inline int secpath_exists(struct sk_buff *skb)
985 return skb->sp != NULL;
991 static inline struct sec_path *
992 secpath_get(struct sec_path *sp)
995 atomic_inc(&sp->refcnt);
999 void __secpath_destroy(struct sec_path *sp);
1002 secpath_put(struct sec_path *sp)
1004 if (sp && atomic_dec_and_test(&sp->refcnt))
1005 __secpath_destroy(sp);
1008 struct sec_path *secpath_dup(struct sec_path *src);
1011 secpath_reset(struct sk_buff *skb)
1014 secpath_put(skb->sp);
1020 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1024 return addr->a4 == 0;
1026 return ipv6_addr_any(&addr->in6);
1032 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1034 return (tmpl->saddr.a4 &&
1035 tmpl->saddr.a4 != x->props.saddr.a4);
1039 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1041 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1042 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1046 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1050 return __xfrm4_state_addr_cmp(tmpl, x);
1052 return __xfrm6_state_addr_cmp(tmpl, x);
1058 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1059 unsigned short family);
1061 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1062 struct sk_buff *skb,
1063 unsigned int family, int reverse)
1065 struct net *net = dev_net(skb->dev);
1066 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1068 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1069 return __xfrm_policy_check(sk, ndir, skb, family);
1071 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1072 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1073 __xfrm_policy_check(sk, ndir, skb, family);
1076 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1078 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1081 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1083 return xfrm_policy_check(sk, dir, skb, AF_INET);
1086 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1088 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1091 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1092 struct sk_buff *skb)
1094 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1097 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1098 struct sk_buff *skb)
1100 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1103 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1104 unsigned int family, int reverse);
1106 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1107 unsigned int family)
1109 return __xfrm_decode_session(skb, fl, family, 0);
1112 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1114 unsigned int family)
1116 return __xfrm_decode_session(skb, fl, family, 1);
1119 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1121 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1123 struct net *net = dev_net(skb->dev);
1125 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1126 (skb_dst(skb)->flags & DST_NOXFRM) ||
1127 __xfrm_route_forward(skb, family);
1130 static inline int xfrm4_route_forward(struct sk_buff *skb)
1132 return xfrm_route_forward(skb, AF_INET);
1135 static inline int xfrm6_route_forward(struct sk_buff *skb)
1137 return xfrm_route_forward(skb, AF_INET6);
1140 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1142 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1144 sk->sk_policy[0] = NULL;
1145 sk->sk_policy[1] = NULL;
1146 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1147 return __xfrm_sk_clone_policy(sk, osk);
1151 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1153 static inline void xfrm_sk_free_policy(struct sock *sk)
1155 struct xfrm_policy *pol;
1157 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1158 if (unlikely(pol != NULL)) {
1159 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1160 sk->sk_policy[0] = NULL;
1162 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1163 if (unlikely(pol != NULL)) {
1164 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1165 sk->sk_policy[1] = NULL;
1169 void xfrm_garbage_collect(struct net *net);
1173 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1174 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1175 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1176 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1177 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1181 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1185 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1189 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1191 unsigned int family)
1195 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1196 struct sk_buff *skb)
1200 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1201 struct sk_buff *skb)
1205 static inline void xfrm_garbage_collect(struct net *net)
1211 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1215 return (xfrm_address_t *)&fl->u.ip4.daddr;
1217 return (xfrm_address_t *)&fl->u.ip6.daddr;
1223 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1227 return (xfrm_address_t *)&fl->u.ip4.saddr;
1229 return (xfrm_address_t *)&fl->u.ip6.saddr;
1235 void xfrm_flowi_addr_get(const struct flowi *fl,
1236 xfrm_address_t *saddr, xfrm_address_t *daddr,
1237 unsigned short family)
1241 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1242 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1245 saddr->in6 = fl->u.ip6.saddr;
1246 daddr->in6 = fl->u.ip6.daddr;
1251 static __inline__ int
1252 __xfrm4_state_addr_check(const struct xfrm_state *x,
1253 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1255 if (daddr->a4 == x->id.daddr.a4 &&
1256 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1261 static __inline__ int
1262 __xfrm6_state_addr_check(const struct xfrm_state *x,
1263 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1265 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1266 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1267 ipv6_addr_any((struct in6_addr *)saddr) ||
1268 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1273 static __inline__ int
1274 xfrm_state_addr_check(const struct xfrm_state *x,
1275 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1276 unsigned short family)
1280 return __xfrm4_state_addr_check(x, daddr, saddr);
1282 return __xfrm6_state_addr_check(x, daddr, saddr);
1287 static __inline__ int
1288 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1289 unsigned short family)
1293 return __xfrm4_state_addr_check(x,
1294 (const xfrm_address_t *)&fl->u.ip4.daddr,
1295 (const xfrm_address_t *)&fl->u.ip4.saddr);
1297 return __xfrm6_state_addr_check(x,
1298 (const xfrm_address_t *)&fl->u.ip6.daddr,
1299 (const xfrm_address_t *)&fl->u.ip6.saddr);
1304 static inline int xfrm_state_kern(const struct xfrm_state *x)
1306 return atomic_read(&x->tunnel_users);
1309 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1311 return (!userproto || proto == userproto ||
1312 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1313 proto == IPPROTO_ESP ||
1314 proto == IPPROTO_COMP)));
1318 * xfrm algorithm information
1320 struct xfrm_algo_aead_info {
1325 struct xfrm_algo_auth_info {
1330 struct xfrm_algo_encr_info {
1336 struct xfrm_algo_comp_info {
1340 struct xfrm_algo_desc {
1344 u8 pfkey_supported:1;
1346 struct xfrm_algo_aead_info aead;
1347 struct xfrm_algo_auth_info auth;
1348 struct xfrm_algo_encr_info encr;
1349 struct xfrm_algo_comp_info comp;
1351 struct sadb_alg desc;
1354 /* XFRM protocol handlers. */
1355 struct xfrm4_protocol {
1356 int (*handler)(struct sk_buff *skb);
1357 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1359 int (*cb_handler)(struct sk_buff *skb, int err);
1360 int (*err_handler)(struct sk_buff *skb, u32 info);
1362 struct xfrm4_protocol __rcu *next;
1366 struct xfrm6_protocol {
1367 int (*handler)(struct sk_buff *skb);
1368 int (*cb_handler)(struct sk_buff *skb, int err);
1369 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1370 u8 type, u8 code, int offset, __be32 info);
1372 struct xfrm6_protocol __rcu *next;
1376 /* XFRM tunnel handlers. */
1377 struct xfrm_tunnel {
1378 int (*handler)(struct sk_buff *skb);
1379 int (*err_handler)(struct sk_buff *skb, u32 info);
1381 struct xfrm_tunnel __rcu *next;
1385 struct xfrm6_tunnel {
1386 int (*handler)(struct sk_buff *skb);
1387 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1388 u8 type, u8 code, int offset, __be32 info);
1389 struct xfrm6_tunnel __rcu *next;
1393 void xfrm_init(void);
1394 void xfrm4_init(void);
1395 int xfrm_state_init(struct net *net);
1396 void xfrm_state_fini(struct net *net);
1397 void xfrm4_state_init(void);
1398 void xfrm4_protocol_init(void);
1400 int xfrm6_init(void);
1401 void xfrm6_fini(void);
1402 int xfrm6_state_init(void);
1403 void xfrm6_state_fini(void);
1404 int xfrm6_protocol_init(void);
1405 void xfrm6_protocol_fini(void);
1407 static inline int xfrm6_init(void)
1411 static inline void xfrm6_fini(void)
1417 #ifdef CONFIG_XFRM_STATISTICS
1418 int xfrm_proc_init(struct net *net);
1419 void xfrm_proc_fini(struct net *net);
1422 int xfrm_sysctl_init(struct net *net);
1423 #ifdef CONFIG_SYSCTL
1424 void xfrm_sysctl_fini(struct net *net);
1426 static inline void xfrm_sysctl_fini(struct net *net)
1431 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1432 struct xfrm_address_filter *filter);
1433 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1434 int (*func)(struct xfrm_state *, int, void*), void *);
1435 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1436 struct xfrm_state *xfrm_state_alloc(struct net *net);
1437 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1438 const xfrm_address_t *saddr,
1439 const struct flowi *fl,
1440 struct xfrm_tmpl *tmpl,
1441 struct xfrm_policy *pol, int *err,
1442 unsigned short family);
1443 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1444 xfrm_address_t *daddr,
1445 xfrm_address_t *saddr,
1446 unsigned short family,
1447 u8 mode, u8 proto, u32 reqid);
1448 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1449 unsigned short family);
1450 int xfrm_state_check_expire(struct xfrm_state *x);
1451 void xfrm_state_insert(struct xfrm_state *x);
1452 int xfrm_state_add(struct xfrm_state *x);
1453 int xfrm_state_update(struct xfrm_state *x);
1454 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1455 const xfrm_address_t *daddr, __be32 spi,
1456 u8 proto, unsigned short family);
1457 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1458 const xfrm_address_t *daddr,
1459 const xfrm_address_t *saddr,
1461 unsigned short family);
1462 #ifdef CONFIG_XFRM_SUB_POLICY
1463 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1464 unsigned short family, struct net *net);
1465 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1466 unsigned short family);
1468 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1469 int n, unsigned short family, struct net *net)
1474 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1475 int n, unsigned short family)
1481 struct xfrmk_sadinfo {
1482 u32 sadhcnt; /* current hash bkts */
1483 u32 sadhmcnt; /* max allowed hash bkts */
1484 u32 sadcnt; /* current running count */
1487 struct xfrmk_spdinfo {
1498 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1499 int xfrm_state_delete(struct xfrm_state *x);
1500 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1501 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1502 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1503 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1504 int xfrm_init_replay(struct xfrm_state *x);
1505 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1506 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1507 int xfrm_init_state(struct xfrm_state *x);
1508 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1509 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1510 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1511 int xfrm_output_resume(struct sk_buff *skb, int err);
1512 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1513 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1514 void xfrm_local_error(struct sk_buff *skb, int mtu);
1515 int xfrm4_extract_header(struct sk_buff *skb);
1516 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1517 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1519 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1520 int xfrm4_rcv(struct sk_buff *skb);
1522 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1524 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1525 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1526 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1527 return xfrm_input(skb, nexthdr, spi, 0);
1530 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1531 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1532 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1533 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1534 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1535 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1536 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1537 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1538 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1539 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1540 int xfrm6_extract_header(struct sk_buff *skb);
1541 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1542 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1544 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1545 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1546 int xfrm6_rcv(struct sk_buff *skb);
1547 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1548 xfrm_address_t *saddr, u8 proto);
1549 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1550 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1551 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1552 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1553 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1554 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1555 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1556 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1557 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1558 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1559 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1560 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1561 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1565 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1566 int xfrm_user_policy(struct sock *sk, int optname,
1567 u8 __user *optval, int optlen);
1569 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1571 return -ENOPROTOOPT;
1574 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1576 /* should not happen */
1582 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1584 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1585 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1586 int (*func)(struct xfrm_policy *, int, int, void*),
1588 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1589 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1590 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1592 struct xfrm_selector *sel,
1593 struct xfrm_sec_ctx *ctx, int delete,
1595 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1596 u32 id, int delete, int *err);
1597 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1598 void xfrm_policy_hash_rebuild(struct net *net);
1599 u32 xfrm_get_acqseq(void);
1600 int verify_spi_info(u8 proto, u32 min, u32 max);
1601 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1602 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1603 u8 mode, u32 reqid, u8 proto,
1604 const xfrm_address_t *daddr,
1605 const xfrm_address_t *saddr, int create,
1606 unsigned short family);
1607 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1609 #ifdef CONFIG_XFRM_MIGRATE
1610 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1611 const struct xfrm_migrate *m, int num_bundles,
1612 const struct xfrm_kmaddress *k);
1613 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1614 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1615 struct xfrm_migrate *m);
1616 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1617 struct xfrm_migrate *m, int num_bundles,
1618 struct xfrm_kmaddress *k, struct net *net);
1621 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1622 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1623 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1624 xfrm_address_t *addr);
1626 void xfrm_input_init(void);
1627 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1629 void xfrm_probe_algs(void);
1630 int xfrm_count_pfkey_auth_supported(void);
1631 int xfrm_count_pfkey_enc_supported(void);
1632 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1633 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1634 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1635 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1636 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1637 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1638 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1639 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1640 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1643 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1644 const xfrm_address_t *b)
1646 return ipv6_addr_equal((const struct in6_addr *)a,
1647 (const struct in6_addr *)b);
1650 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1651 const xfrm_address_t *b,
1657 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1659 return xfrm6_addr_equal(a, b);
1663 static inline int xfrm_policy_id2dir(u32 index)
1669 static inline int xfrm_aevent_is_on(struct net *net)
1675 nlsk = rcu_dereference(net->xfrm.nlsk);
1677 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1682 static inline int xfrm_acquire_is_on(struct net *net)
1688 nlsk = rcu_dereference(net->xfrm.nlsk);
1690 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1697 static inline int aead_len(struct xfrm_algo_aead *alg)
1699 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1702 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1704 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1707 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1709 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1712 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1714 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1717 #ifdef CONFIG_XFRM_MIGRATE
1718 static inline int xfrm_replay_clone(struct xfrm_state *x,
1719 struct xfrm_state *orig)
1721 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1726 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1727 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1729 x->preplay_esn = kmemdup(x->replay_esn,
1730 xfrm_replay_state_esn_len(x->replay_esn),
1732 if (!x->preplay_esn) {
1733 kfree(x->replay_esn);
1740 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1742 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1746 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1748 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1751 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1753 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1756 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1759 for (i = 0; i < n; i++)
1760 xfrm_state_put(*(states + i));
1763 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1766 for (i = 0; i < n; i++)
1767 xfrm_state_delete(*(states + i));
1772 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1774 return skb->sp->xvec[skb->sp->len - 1];
1778 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1780 if (attrs[XFRMA_MARK])
1781 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1788 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1793 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1797 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1798 unsigned int family)
1800 bool tunnel = false;
1804 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1808 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1812 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1817 #endif /* _NET_XFRM_H */