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);
346 void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
348 struct xfrm_input_afinfo {
350 struct module *owner;
351 int (*callback)(struct sk_buff *skb, u8 protocol,
355 int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
356 int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
358 void xfrm_state_delete_tunnel(struct xfrm_state *x);
362 struct module *owner;
365 #define XFRM_TYPE_NON_FRAGMENT 1
366 #define XFRM_TYPE_REPLAY_PROT 2
367 #define XFRM_TYPE_LOCAL_COADDR 4
368 #define XFRM_TYPE_REMOTE_COADDR 8
370 int (*init_state)(struct xfrm_state *x);
371 void (*destructor)(struct xfrm_state *);
372 int (*input)(struct xfrm_state *, struct sk_buff *skb);
373 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
374 int (*reject)(struct xfrm_state *, struct sk_buff *,
375 const struct flowi *);
376 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
377 /* Estimate maximal size of result of transformation of a dgram */
378 u32 (*get_mtu)(struct xfrm_state *, int size);
381 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
382 int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
386 * Remove encapsulation header.
388 * The IP header will be moved over the top of the encapsulation
391 * On entry, the transport header shall point to where the IP header
392 * should be and the network header shall be set to where the IP
393 * header currently is. skb->data shall point to the start of the
396 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
399 * This is the actual input entry point.
401 * For transport mode and equivalent this would be identical to
402 * input2 (which does not need to be set). While tunnel mode
403 * and equivalent would set this to the tunnel encapsulation function
404 * xfrm4_prepare_input that would in turn call input2.
406 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
409 * Add encapsulation header.
411 * On exit, the transport header will be set to the start of the
412 * encapsulation header to be filled in by x->type->output and
413 * the mac header will be set to the nextheader (protocol for
414 * IPv4) field of the extension header directly preceding the
415 * encapsulation header, or in its absence, that of the top IP
416 * header. The value of the network header will always point
417 * to the top IP header while skb->data will point to the payload.
419 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
422 * This is the actual output entry point.
424 * For transport mode and equivalent this would be identical to
425 * output2 (which does not need to be set). While tunnel mode
426 * and equivalent would set this to a tunnel encapsulation function
427 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
430 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
432 struct xfrm_state_afinfo *afinfo;
433 struct module *owner;
438 /* Flags for xfrm_mode. */
440 XFRM_MODE_FLAG_TUNNEL = 1,
443 int xfrm_register_mode(struct xfrm_mode *mode, int family);
444 int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
446 static inline int xfrm_af2proto(unsigned int family)
458 static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
460 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
461 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
462 return x->inner_mode;
464 return x->inner_mode_iaf;
468 /* id in template is interpreted as:
469 * daddr - destination of tunnel, may be zero for transport mode.
470 * spi - zero to acquire spi. Not zero if spi is static, then
471 * daddr must be fixed too.
472 * proto - AH/ESP/IPCOMP
476 /* Source address of tunnel. Ignored, if it is not a tunnel. */
477 xfrm_address_t saddr;
479 unsigned short encap_family;
483 /* Mode: transport, tunnel etc. */
486 /* Sharing mode: unique, this session only, this user only etc. */
489 /* May skip this transfomration if no SA is found */
492 /* Skip aalgos/ealgos/calgos checks. */
495 /* Bit mask of algos allowed for acquisition */
501 #define XFRM_MAX_DEPTH 6
503 struct xfrm_policy_walk_entry {
504 struct list_head all;
508 struct xfrm_policy_walk {
509 struct xfrm_policy_walk_entry walk;
514 struct xfrm_policy_queue {
515 struct sk_buff_head hold_queue;
516 struct timer_list hold_timer;
517 unsigned long timeout;
521 possible_net_t xp_net;
522 struct hlist_node bydst;
523 struct hlist_node byidx;
525 /* This lock only affects elements except for entry. */
528 struct timer_list timer;
530 struct flow_cache_object flo;
534 struct xfrm_mark mark;
535 struct xfrm_selector selector;
536 struct xfrm_lifetime_cfg lft;
537 struct xfrm_lifetime_cur curlft;
538 struct xfrm_policy_walk_entry walk;
539 struct xfrm_policy_queue polq;
545 struct xfrm_sec_ctx *security;
546 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
550 static inline struct net *xp_net(const struct xfrm_policy *xp)
552 return read_pnet(&xp->xp_net);
555 struct xfrm_kmaddress {
556 xfrm_address_t local;
557 xfrm_address_t remote;
562 struct xfrm_migrate {
563 xfrm_address_t old_daddr;
564 xfrm_address_t old_saddr;
565 xfrm_address_t new_daddr;
566 xfrm_address_t new_saddr;
575 #define XFRM_KM_TIMEOUT 30
577 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
578 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
580 /* default aevent timeout in units of 100ms */
581 #define XFRM_AE_ETIME 10
582 /* Async Event timer multiplier */
583 #define XFRM_AE_ETH_M 10
584 /* default seq threshold size */
585 #define XFRM_AE_SEQT_SIZE 2
588 struct list_head list;
590 int (*notify)(struct xfrm_state *x, const struct km_event *c);
591 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
592 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
593 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
594 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
595 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
596 int (*migrate)(const struct xfrm_selector *sel,
598 const struct xfrm_migrate *m,
600 const struct xfrm_kmaddress *k);
601 bool (*is_alive)(const struct km_event *c);
604 int xfrm_register_km(struct xfrm_mgr *km);
605 int xfrm_unregister_km(struct xfrm_mgr *km);
607 struct xfrm_tunnel_skb_cb {
609 struct inet_skb_parm h4;
610 struct inet6_skb_parm h6;
614 struct ip_tunnel *ip4;
619 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
622 * This structure is used for the duration where packets are being
623 * transformed by IPsec. As soon as the packet leaves IPsec the
624 * area beyond the generic IP part may be overwritten.
627 struct xfrm_tunnel_skb_cb header;
629 /* Sequence number for replay protection. */
642 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
645 * This structure is used by the afinfo prepare_input/prepare_output functions
646 * to transmit header information to the mode input/output functions.
648 struct xfrm_mode_skb_cb {
649 struct xfrm_tunnel_skb_cb header;
651 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
655 /* IP header length (excluding options or extension headers). */
658 /* TOS for IPv4, class for IPv6. */
661 /* TTL for IPv4, hop limitfor IPv6. */
664 /* Protocol for IPv4, NH for IPv6. */
667 /* Option length for IPv4, zero for IPv6. */
670 /* Used by IPv6 only, zero for IPv4. */
674 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
677 * This structure is used by the input processing to locate the SPI and
678 * related information.
680 struct xfrm_spi_skb_cb {
681 struct xfrm_tunnel_skb_cb header;
683 unsigned int daddroff;
687 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
689 #ifdef CONFIG_AUDITSYSCALL
690 static inline struct audit_buffer *xfrm_audit_start(const char *op)
692 struct audit_buffer *audit_buf = NULL;
694 if (audit_enabled == 0)
696 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
697 AUDIT_MAC_IPSEC_EVENT);
698 if (audit_buf == NULL)
700 audit_log_format(audit_buf, "op=%s", op);
704 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
705 struct audit_buffer *audit_buf)
707 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
708 audit_get_loginuid(current) :
710 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
713 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
714 audit_log_task_context(audit_buf);
717 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
718 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
720 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
721 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
722 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
723 struct sk_buff *skb);
724 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
726 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
727 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
729 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
733 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
738 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
743 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
748 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
753 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
758 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
759 struct sk_buff *skb, __be32 net_seq)
763 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
768 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
769 __be32 net_spi, __be32 net_seq)
773 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
774 struct sk_buff *skb, u8 proto)
777 #endif /* CONFIG_AUDITSYSCALL */
779 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
781 if (likely(policy != NULL))
782 atomic_inc(&policy->refcnt);
785 void xfrm_policy_destroy(struct xfrm_policy *policy);
787 static inline void xfrm_pol_put(struct xfrm_policy *policy)
789 if (atomic_dec_and_test(&policy->refcnt))
790 xfrm_policy_destroy(policy);
793 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
796 for (i = npols - 1; i >= 0; --i)
797 xfrm_pol_put(pols[i]);
800 void __xfrm_state_destroy(struct xfrm_state *);
802 static inline void __xfrm_state_put(struct xfrm_state *x)
804 atomic_dec(&x->refcnt);
807 static inline void xfrm_state_put(struct xfrm_state *x)
809 if (atomic_dec_and_test(&x->refcnt))
810 __xfrm_state_destroy(x);
813 static inline void xfrm_state_hold(struct xfrm_state *x)
815 atomic_inc(&x->refcnt);
818 static inline bool addr_match(const void *token1, const void *token2,
821 const __be32 *a1 = token1;
822 const __be32 *a2 = token2;
826 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
827 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
830 if (memcmp(a1, a2, pdw << 2))
836 mask = htonl((0xffffffff) << (32 - pbi));
838 if ((a1[pdw] ^ a2[pdw]) & mask)
845 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
847 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
850 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
854 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
857 switch(fl->flowi_proto) {
860 case IPPROTO_UDPLITE:
862 port = uli->ports.sport;
866 port = htons(uli->icmpt.type);
869 port = htons(uli->mht.type);
872 port = htons(ntohl(uli->gre_key) >> 16);
881 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
884 switch(fl->flowi_proto) {
887 case IPPROTO_UDPLITE:
889 port = uli->ports.dport;
893 port = htons(uli->icmpt.code);
896 port = htons(ntohl(uli->gre_key) & 0xffff);
904 bool xfrm_selector_match(const struct xfrm_selector *sel,
905 const struct flowi *fl, unsigned short family);
907 #ifdef CONFIG_SECURITY_NETWORK_XFRM
908 /* If neither has a context --> match
909 * Otherwise, both must have a context and the sids, doi, alg must match
911 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
913 return ((!s1 && !s2) ||
915 (s1->ctx_sid == s2->ctx_sid) &&
916 (s1->ctx_doi == s2->ctx_doi) &&
917 (s1->ctx_alg == s2->ctx_alg)));
920 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
926 /* A struct encoding bundle of transformations to apply to some set of flow.
928 * dst->child points to the next element of bundle.
929 * dst->xfrm points to an instanse of transformer.
931 * Due to unfortunate limitations of current routing cache, which we
932 * have no time to fix, it mirrors struct rtable and bound to the same
933 * routing key, including saddr,daddr. However, we can have many of
934 * bundles differing by session id. All the bundles grow from a parent
939 struct dst_entry dst;
943 struct dst_entry *route;
944 struct flow_cache_object flo;
945 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
946 int num_pols, num_xfrms;
949 u32 route_mtu_cached;
950 u32 child_mtu_cached;
956 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
958 xfrm_pols_put(xdst->pols, xdst->num_pols);
959 dst_release(xdst->route);
960 if (likely(xdst->u.dst.xfrm))
961 xfrm_state_put(xdst->u.dst.xfrm);
965 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
970 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
973 static inline int secpath_exists(struct sk_buff *skb)
976 return skb->sp != NULL;
982 static inline struct sec_path *
983 secpath_get(struct sec_path *sp)
986 atomic_inc(&sp->refcnt);
990 void __secpath_destroy(struct sec_path *sp);
993 secpath_put(struct sec_path *sp)
995 if (sp && atomic_dec_and_test(&sp->refcnt))
996 __secpath_destroy(sp);
999 struct sec_path *secpath_dup(struct sec_path *src);
1002 secpath_reset(struct sk_buff *skb)
1005 secpath_put(skb->sp);
1011 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1015 return addr->a4 == 0;
1017 return ipv6_addr_any(&addr->in6);
1023 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1025 return (tmpl->saddr.a4 &&
1026 tmpl->saddr.a4 != x->props.saddr.a4);
1030 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1032 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1033 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1037 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1041 return __xfrm4_state_addr_cmp(tmpl, x);
1043 return __xfrm6_state_addr_cmp(tmpl, x);
1049 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1050 unsigned short family);
1052 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1053 struct sk_buff *skb,
1054 unsigned int family, int reverse)
1056 struct net *net = dev_net(skb->dev);
1057 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1059 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1060 return __xfrm_policy_check(sk, ndir, skb, family);
1062 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1063 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1064 __xfrm_policy_check(sk, ndir, skb, family);
1067 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1069 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1072 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1074 return xfrm_policy_check(sk, dir, skb, AF_INET);
1077 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1079 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1082 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1083 struct sk_buff *skb)
1085 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1088 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1089 struct sk_buff *skb)
1091 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1094 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1095 unsigned int family, int reverse);
1097 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1098 unsigned int family)
1100 return __xfrm_decode_session(skb, fl, family, 0);
1103 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1105 unsigned int family)
1107 return __xfrm_decode_session(skb, fl, family, 1);
1110 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1112 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1114 struct net *net = dev_net(skb->dev);
1116 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1117 (skb_dst(skb)->flags & DST_NOXFRM) ||
1118 __xfrm_route_forward(skb, family);
1121 static inline int xfrm4_route_forward(struct sk_buff *skb)
1123 return xfrm_route_forward(skb, AF_INET);
1126 static inline int xfrm6_route_forward(struct sk_buff *skb)
1128 return xfrm_route_forward(skb, AF_INET6);
1131 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1133 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1135 sk->sk_policy[0] = NULL;
1136 sk->sk_policy[1] = NULL;
1137 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1138 return __xfrm_sk_clone_policy(sk, osk);
1142 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1144 static inline void xfrm_sk_free_policy(struct sock *sk)
1146 struct xfrm_policy *pol;
1148 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1149 if (unlikely(pol != NULL)) {
1150 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1151 sk->sk_policy[0] = NULL;
1153 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1154 if (unlikely(pol != NULL)) {
1155 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1156 sk->sk_policy[1] = NULL;
1160 void xfrm_garbage_collect(struct net *net);
1164 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1165 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1166 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1167 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1168 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1172 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1176 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1180 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1182 unsigned int family)
1186 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1187 struct sk_buff *skb)
1191 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1192 struct sk_buff *skb)
1196 static inline void xfrm_garbage_collect(struct net *net)
1202 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1206 return (xfrm_address_t *)&fl->u.ip4.daddr;
1208 return (xfrm_address_t *)&fl->u.ip6.daddr;
1214 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1218 return (xfrm_address_t *)&fl->u.ip4.saddr;
1220 return (xfrm_address_t *)&fl->u.ip6.saddr;
1226 void xfrm_flowi_addr_get(const struct flowi *fl,
1227 xfrm_address_t *saddr, xfrm_address_t *daddr,
1228 unsigned short family)
1232 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1233 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1236 saddr->in6 = fl->u.ip6.saddr;
1237 daddr->in6 = fl->u.ip6.daddr;
1242 static __inline__ int
1243 __xfrm4_state_addr_check(const struct xfrm_state *x,
1244 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1246 if (daddr->a4 == x->id.daddr.a4 &&
1247 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1252 static __inline__ int
1253 __xfrm6_state_addr_check(const struct xfrm_state *x,
1254 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1256 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1257 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1258 ipv6_addr_any((struct in6_addr *)saddr) ||
1259 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1264 static __inline__ int
1265 xfrm_state_addr_check(const struct xfrm_state *x,
1266 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1267 unsigned short family)
1271 return __xfrm4_state_addr_check(x, daddr, saddr);
1273 return __xfrm6_state_addr_check(x, daddr, saddr);
1278 static __inline__ int
1279 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1280 unsigned short family)
1284 return __xfrm4_state_addr_check(x,
1285 (const xfrm_address_t *)&fl->u.ip4.daddr,
1286 (const xfrm_address_t *)&fl->u.ip4.saddr);
1288 return __xfrm6_state_addr_check(x,
1289 (const xfrm_address_t *)&fl->u.ip6.daddr,
1290 (const xfrm_address_t *)&fl->u.ip6.saddr);
1295 static inline int xfrm_state_kern(const struct xfrm_state *x)
1297 return atomic_read(&x->tunnel_users);
1300 static inline bool xfrm_id_proto_valid(u8 proto)
1306 #if IS_ENABLED(CONFIG_IPV6)
1307 case IPPROTO_ROUTING:
1308 case IPPROTO_DSTOPTS:
1316 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1317 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1319 return (!userproto || proto == userproto ||
1320 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1321 proto == IPPROTO_ESP ||
1322 proto == IPPROTO_COMP)));
1326 * xfrm algorithm information
1328 struct xfrm_algo_aead_info {
1333 struct xfrm_algo_auth_info {
1338 struct xfrm_algo_encr_info {
1344 struct xfrm_algo_comp_info {
1348 struct xfrm_algo_desc {
1352 u8 pfkey_supported:1;
1354 struct xfrm_algo_aead_info aead;
1355 struct xfrm_algo_auth_info auth;
1356 struct xfrm_algo_encr_info encr;
1357 struct xfrm_algo_comp_info comp;
1359 struct sadb_alg desc;
1362 /* XFRM protocol handlers. */
1363 struct xfrm4_protocol {
1364 int (*handler)(struct sk_buff *skb);
1365 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1367 int (*cb_handler)(struct sk_buff *skb, int err);
1368 int (*err_handler)(struct sk_buff *skb, u32 info);
1370 struct xfrm4_protocol __rcu *next;
1374 struct xfrm6_protocol {
1375 int (*handler)(struct sk_buff *skb);
1376 int (*cb_handler)(struct sk_buff *skb, int err);
1377 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1378 u8 type, u8 code, int offset, __be32 info);
1380 struct xfrm6_protocol __rcu *next;
1384 /* XFRM tunnel handlers. */
1385 struct xfrm_tunnel {
1386 int (*handler)(struct sk_buff *skb);
1387 int (*err_handler)(struct sk_buff *skb, u32 info);
1389 struct xfrm_tunnel __rcu *next;
1393 struct xfrm6_tunnel {
1394 int (*handler)(struct sk_buff *skb);
1395 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1396 u8 type, u8 code, int offset, __be32 info);
1397 struct xfrm6_tunnel __rcu *next;
1401 void xfrm_init(void);
1402 void xfrm4_init(void);
1403 int xfrm_state_init(struct net *net);
1404 void xfrm_state_fini(struct net *net);
1405 void xfrm4_state_init(void);
1406 void xfrm4_protocol_init(void);
1408 int xfrm6_init(void);
1409 void xfrm6_fini(void);
1410 int xfrm6_state_init(void);
1411 void xfrm6_state_fini(void);
1412 int xfrm6_protocol_init(void);
1413 void xfrm6_protocol_fini(void);
1415 static inline int xfrm6_init(void)
1419 static inline void xfrm6_fini(void)
1425 #ifdef CONFIG_XFRM_STATISTICS
1426 int xfrm_proc_init(struct net *net);
1427 void xfrm_proc_fini(struct net *net);
1430 int xfrm_sysctl_init(struct net *net);
1431 #ifdef CONFIG_SYSCTL
1432 void xfrm_sysctl_fini(struct net *net);
1434 static inline void xfrm_sysctl_fini(struct net *net)
1439 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1440 struct xfrm_address_filter *filter);
1441 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1442 int (*func)(struct xfrm_state *, int, void*), void *);
1443 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1444 struct xfrm_state *xfrm_state_alloc(struct net *net);
1445 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1446 const xfrm_address_t *saddr,
1447 const struct flowi *fl,
1448 struct xfrm_tmpl *tmpl,
1449 struct xfrm_policy *pol, int *err,
1450 unsigned short family);
1451 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1452 xfrm_address_t *daddr,
1453 xfrm_address_t *saddr,
1454 unsigned short family,
1455 u8 mode, u8 proto, u32 reqid);
1456 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1457 unsigned short family);
1458 int xfrm_state_check_expire(struct xfrm_state *x);
1459 void xfrm_state_insert(struct xfrm_state *x);
1460 int xfrm_state_add(struct xfrm_state *x);
1461 int xfrm_state_update(struct xfrm_state *x);
1462 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1463 const xfrm_address_t *daddr, __be32 spi,
1464 u8 proto, unsigned short family);
1465 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1466 const xfrm_address_t *daddr,
1467 const xfrm_address_t *saddr,
1469 unsigned short family);
1470 #ifdef CONFIG_XFRM_SUB_POLICY
1471 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1472 unsigned short family, struct net *net);
1473 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1474 unsigned short family);
1476 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1477 int n, unsigned short family, struct net *net)
1482 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1483 int n, unsigned short family)
1489 struct xfrmk_sadinfo {
1490 u32 sadhcnt; /* current hash bkts */
1491 u32 sadhmcnt; /* max allowed hash bkts */
1492 u32 sadcnt; /* current running count */
1495 struct xfrmk_spdinfo {
1506 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1507 int xfrm_state_delete(struct xfrm_state *x);
1508 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1509 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1510 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1511 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1512 int xfrm_init_replay(struct xfrm_state *x);
1513 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1514 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1515 int xfrm_init_state(struct xfrm_state *x);
1516 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1517 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1518 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1519 int xfrm_output_resume(struct sk_buff *skb, int err);
1520 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1521 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1522 void xfrm_local_error(struct sk_buff *skb, int mtu);
1523 int xfrm4_extract_header(struct sk_buff *skb);
1524 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1525 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1527 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1528 int xfrm4_rcv(struct sk_buff *skb);
1530 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1532 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1533 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1534 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1535 return xfrm_input(skb, nexthdr, spi, 0);
1538 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1539 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1540 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1541 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1542 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1543 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1544 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1545 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1546 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1547 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1548 int xfrm6_extract_header(struct sk_buff *skb);
1549 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1550 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1552 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1553 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1554 int xfrm6_rcv(struct sk_buff *skb);
1555 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1556 xfrm_address_t *saddr, u8 proto);
1557 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1558 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1559 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1560 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1561 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1562 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1563 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1564 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1565 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1566 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1567 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1568 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1569 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1573 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1574 int xfrm_user_policy(struct sock *sk, int optname,
1575 u8 __user *optval, int optlen);
1577 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1579 return -ENOPROTOOPT;
1582 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1584 /* should not happen */
1590 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1592 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1593 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1594 int (*func)(struct xfrm_policy *, int, int, void*),
1596 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1597 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1598 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net,
1599 const struct xfrm_mark *mark,
1601 struct xfrm_selector *sel,
1602 struct xfrm_sec_ctx *ctx, int delete,
1604 struct xfrm_policy *xfrm_policy_byid(struct net *net,
1605 const struct xfrm_mark *mark,
1606 u8 type, int dir, u32 id, int delete,
1608 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1609 void xfrm_policy_hash_rebuild(struct net *net);
1610 u32 xfrm_get_acqseq(void);
1611 int verify_spi_info(u8 proto, u32 min, u32 max);
1612 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1613 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1614 u8 mode, u32 reqid, u8 proto,
1615 const xfrm_address_t *daddr,
1616 const xfrm_address_t *saddr, int create,
1617 unsigned short family);
1618 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1620 #ifdef CONFIG_XFRM_MIGRATE
1621 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1622 const struct xfrm_migrate *m, int num_bundles,
1623 const struct xfrm_kmaddress *k);
1624 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1625 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1626 struct xfrm_migrate *m);
1627 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1628 struct xfrm_migrate *m, int num_bundles,
1629 struct xfrm_kmaddress *k, struct net *net);
1632 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1633 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1634 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1635 xfrm_address_t *addr);
1637 void xfrm_input_init(void);
1638 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1640 void xfrm_probe_algs(void);
1641 int xfrm_count_pfkey_auth_supported(void);
1642 int xfrm_count_pfkey_enc_supported(void);
1643 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1644 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1645 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1646 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1647 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1648 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1649 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1650 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1651 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1654 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1655 const xfrm_address_t *b)
1657 return ipv6_addr_equal((const struct in6_addr *)a,
1658 (const struct in6_addr *)b);
1661 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1662 const xfrm_address_t *b,
1668 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1670 return xfrm6_addr_equal(a, b);
1674 static inline int xfrm_policy_id2dir(u32 index)
1680 static inline int xfrm_aevent_is_on(struct net *net)
1686 nlsk = rcu_dereference(net->xfrm.nlsk);
1688 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1693 static inline int xfrm_acquire_is_on(struct net *net)
1699 nlsk = rcu_dereference(net->xfrm.nlsk);
1701 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1708 static inline int aead_len(struct xfrm_algo_aead *alg)
1710 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1713 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1715 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1718 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1720 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1723 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1725 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1728 #ifdef CONFIG_XFRM_MIGRATE
1729 static inline int xfrm_replay_clone(struct xfrm_state *x,
1730 struct xfrm_state *orig)
1733 x->replay_esn = kmemdup(orig->replay_esn,
1734 xfrm_replay_state_esn_len(orig->replay_esn),
1738 x->preplay_esn = kmemdup(orig->preplay_esn,
1739 xfrm_replay_state_esn_len(orig->preplay_esn),
1741 if (!x->preplay_esn)
1747 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1749 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1753 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1755 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1758 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1760 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1763 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1766 for (i = 0; i < n; i++)
1767 xfrm_state_put(*(states + i));
1770 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1773 for (i = 0; i < n; i++)
1774 xfrm_state_delete(*(states + i));
1779 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1781 return skb->sp->xvec[skb->sp->len - 1];
1785 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1787 if (attrs[XFRMA_MARK])
1788 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1795 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1800 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1804 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1805 unsigned int family)
1807 bool tunnel = false;
1811 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1815 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1819 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1824 #endif /* _NET_XFRM_H */