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 struct page_frag xfrag;
218 /* Reference to data common to all the instances of this
220 const struct xfrm_type *type;
221 struct xfrm_mode *inner_mode;
222 struct xfrm_mode *inner_mode_iaf;
223 struct xfrm_mode *outer_mode;
225 /* Security context */
226 struct xfrm_sec_ctx *security;
228 /* Private data of this transformer, format is opaque,
229 * interpreted by xfrm_type methods. */
233 static inline struct net *xs_net(struct xfrm_state *x)
235 return read_pnet(&x->xs_net);
238 /* xflags - make enum if more show up */
239 #define XFRM_TIME_DEFER 1
240 #define XFRM_SOFT_EXPIRE 2
251 /* callback structure passed from either netlink or pfkey */
268 void (*advance)(struct xfrm_state *x, __be32 net_seq);
269 int (*check)(struct xfrm_state *x,
272 int (*recheck)(struct xfrm_state *x,
275 void (*notify)(struct xfrm_state *x, int event);
276 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
282 struct xfrm_policy_afinfo {
283 struct dst_ops *dst_ops;
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(const struct xfrm_policy_afinfo *afinfo, int family);
305 void xfrm_policy_unregister_afinfo(const 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 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
348 struct xfrm_input_afinfo {
350 int (*callback)(struct sk_buff *skb, u8 protocol,
354 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
355 int xfrm_input_unregister_afinfo(const 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
501 #define XFRM_MAX_OFFLOAD_DEPTH 1
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;
688 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
690 #ifdef CONFIG_AUDITSYSCALL
691 static inline struct audit_buffer *xfrm_audit_start(const char *op)
693 struct audit_buffer *audit_buf = NULL;
695 if (audit_enabled == 0)
697 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
698 AUDIT_MAC_IPSEC_EVENT);
699 if (audit_buf == NULL)
701 audit_log_format(audit_buf, "op=%s", op);
705 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
706 struct audit_buffer *audit_buf)
708 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
709 audit_get_loginuid(current) :
711 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
714 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
715 audit_log_task_context(audit_buf);
718 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
719 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
721 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
722 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
723 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
724 struct sk_buff *skb);
725 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
727 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
728 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
730 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
734 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
739 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
744 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
749 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
754 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
759 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
760 struct sk_buff *skb, __be32 net_seq)
764 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
769 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
770 __be32 net_spi, __be32 net_seq)
774 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
775 struct sk_buff *skb, u8 proto)
778 #endif /* CONFIG_AUDITSYSCALL */
780 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
782 if (likely(policy != NULL))
783 atomic_inc(&policy->refcnt);
786 void xfrm_policy_destroy(struct xfrm_policy *policy);
788 static inline void xfrm_pol_put(struct xfrm_policy *policy)
790 if (atomic_dec_and_test(&policy->refcnt))
791 xfrm_policy_destroy(policy);
794 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
797 for (i = npols - 1; i >= 0; --i)
798 xfrm_pol_put(pols[i]);
801 void __xfrm_state_destroy(struct xfrm_state *);
803 static inline void __xfrm_state_put(struct xfrm_state *x)
805 atomic_dec(&x->refcnt);
808 static inline void xfrm_state_put(struct xfrm_state *x)
810 if (atomic_dec_and_test(&x->refcnt))
811 __xfrm_state_destroy(x);
814 static inline void xfrm_state_hold(struct xfrm_state *x)
816 atomic_inc(&x->refcnt);
819 static inline bool addr_match(const void *token1, const void *token2,
822 const __be32 *a1 = token1;
823 const __be32 *a2 = token2;
827 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
828 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
831 if (memcmp(a1, a2, pdw << 2))
837 mask = htonl((0xffffffff) << (32 - pbi));
839 if ((a1[pdw] ^ a2[pdw]) & mask)
846 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
848 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
851 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
855 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
858 switch(fl->flowi_proto) {
861 case IPPROTO_UDPLITE:
863 port = uli->ports.sport;
867 port = htons(uli->icmpt.type);
870 port = htons(uli->mht.type);
873 port = htons(ntohl(uli->gre_key) >> 16);
882 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
885 switch(fl->flowi_proto) {
888 case IPPROTO_UDPLITE:
890 port = uli->ports.dport;
894 port = htons(uli->icmpt.code);
897 port = htons(ntohl(uli->gre_key) & 0xffff);
905 bool xfrm_selector_match(const struct xfrm_selector *sel,
906 const struct flowi *fl, unsigned short family);
908 #ifdef CONFIG_SECURITY_NETWORK_XFRM
909 /* If neither has a context --> match
910 * Otherwise, both must have a context and the sids, doi, alg must match
912 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
914 return ((!s1 && !s2) ||
916 (s1->ctx_sid == s2->ctx_sid) &&
917 (s1->ctx_doi == s2->ctx_doi) &&
918 (s1->ctx_alg == s2->ctx_alg)));
921 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
927 /* A struct encoding bundle of transformations to apply to some set of flow.
929 * dst->child points to the next element of bundle.
930 * dst->xfrm points to an instanse of transformer.
932 * Due to unfortunate limitations of current routing cache, which we
933 * have no time to fix, it mirrors struct rtable and bound to the same
934 * routing key, including saddr,daddr. However, we can have many of
935 * bundles differing by session id. All the bundles grow from a parent
940 struct dst_entry dst;
944 struct dst_entry *route;
945 struct flow_cache_object flo;
946 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
947 int num_pols, num_xfrms;
948 #ifdef CONFIG_XFRM_SUB_POLICY
949 struct flowi *origin;
950 struct xfrm_selector *partner;
954 u32 route_mtu_cached;
955 u32 child_mtu_cached;
961 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
963 xfrm_pols_put(xdst->pols, xdst->num_pols);
964 dst_release(xdst->route);
965 if (likely(xdst->u.dst.xfrm))
966 xfrm_state_put(xdst->u.dst.xfrm);
967 #ifdef CONFIG_XFRM_SUB_POLICY
970 kfree(xdst->partner);
971 xdst->partner = NULL;
976 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
978 struct xfrm_offload {
979 /* Output sequence number for replay protection on offloading. */
986 #define SA_DELETE_REQ 1
987 #define CRYPTO_DONE 2
988 #define CRYPTO_NEXT_DONE 4
989 #define CRYPTO_FALLBACK 8
990 #define XFRM_GSO_SEGMENT 16
994 #define CRYPTO_SUCCESS 1
995 #define CRYPTO_GENERIC_ERROR 2
996 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
997 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
998 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
999 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1000 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1001 #define CRYPTO_INVALID_PROTOCOL 128
1011 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1012 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1015 static inline int secpath_exists(struct sk_buff *skb)
1018 return skb->sp != NULL;
1024 static inline struct sec_path *
1025 secpath_get(struct sec_path *sp)
1028 atomic_inc(&sp->refcnt);
1032 void __secpath_destroy(struct sec_path *sp);
1035 secpath_put(struct sec_path *sp)
1037 if (sp && atomic_dec_and_test(&sp->refcnt))
1038 __secpath_destroy(sp);
1041 struct sec_path *secpath_dup(struct sec_path *src);
1042 int secpath_set(struct sk_buff *skb);
1045 secpath_reset(struct sk_buff *skb)
1048 secpath_put(skb->sp);
1054 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1058 return addr->a4 == 0;
1060 return ipv6_addr_any(&addr->in6);
1066 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1068 return (tmpl->saddr.a4 &&
1069 tmpl->saddr.a4 != x->props.saddr.a4);
1073 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1075 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1076 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1080 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1084 return __xfrm4_state_addr_cmp(tmpl, x);
1086 return __xfrm6_state_addr_cmp(tmpl, x);
1092 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1093 unsigned short family);
1095 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1096 struct sk_buff *skb,
1097 unsigned int family, int reverse)
1099 struct net *net = dev_net(skb->dev);
1100 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1102 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1103 return __xfrm_policy_check(sk, ndir, skb, family);
1105 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
1106 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1107 __xfrm_policy_check(sk, ndir, skb, family);
1110 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1112 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1115 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1117 return xfrm_policy_check(sk, dir, skb, AF_INET);
1120 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1122 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1125 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1126 struct sk_buff *skb)
1128 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1131 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1132 struct sk_buff *skb)
1134 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1137 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1138 unsigned int family, int reverse);
1140 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1141 unsigned int family)
1143 return __xfrm_decode_session(skb, fl, family, 0);
1146 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1148 unsigned int family)
1150 return __xfrm_decode_session(skb, fl, family, 1);
1153 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1155 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1157 struct net *net = dev_net(skb->dev);
1159 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1160 (skb_dst(skb)->flags & DST_NOXFRM) ||
1161 __xfrm_route_forward(skb, family);
1164 static inline int xfrm4_route_forward(struct sk_buff *skb)
1166 return xfrm_route_forward(skb, AF_INET);
1169 static inline int xfrm6_route_forward(struct sk_buff *skb)
1171 return xfrm_route_forward(skb, AF_INET6);
1174 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1176 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1178 sk->sk_policy[0] = NULL;
1179 sk->sk_policy[1] = NULL;
1180 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1181 return __xfrm_sk_clone_policy(sk, osk);
1185 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1187 static inline void xfrm_sk_free_policy(struct sock *sk)
1189 struct xfrm_policy *pol;
1191 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1192 if (unlikely(pol != NULL)) {
1193 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1194 sk->sk_policy[0] = NULL;
1196 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1197 if (unlikely(pol != NULL)) {
1198 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1199 sk->sk_policy[1] = NULL;
1203 void xfrm_garbage_collect(struct net *net);
1204 void xfrm_garbage_collect_deferred(struct net *net);
1208 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1209 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1210 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1211 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1212 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1216 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1220 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1224 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1226 unsigned int family)
1230 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1231 struct sk_buff *skb)
1235 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1236 struct sk_buff *skb)
1240 static inline void xfrm_garbage_collect(struct net *net)
1246 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1250 return (xfrm_address_t *)&fl->u.ip4.daddr;
1252 return (xfrm_address_t *)&fl->u.ip6.daddr;
1258 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1262 return (xfrm_address_t *)&fl->u.ip4.saddr;
1264 return (xfrm_address_t *)&fl->u.ip6.saddr;
1270 void xfrm_flowi_addr_get(const struct flowi *fl,
1271 xfrm_address_t *saddr, xfrm_address_t *daddr,
1272 unsigned short family)
1276 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1277 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1280 saddr->in6 = fl->u.ip6.saddr;
1281 daddr->in6 = fl->u.ip6.daddr;
1286 static __inline__ int
1287 __xfrm4_state_addr_check(const struct xfrm_state *x,
1288 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1290 if (daddr->a4 == x->id.daddr.a4 &&
1291 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1296 static __inline__ int
1297 __xfrm6_state_addr_check(const struct xfrm_state *x,
1298 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1300 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1301 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1302 ipv6_addr_any((struct in6_addr *)saddr) ||
1303 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1308 static __inline__ int
1309 xfrm_state_addr_check(const struct xfrm_state *x,
1310 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1311 unsigned short family)
1315 return __xfrm4_state_addr_check(x, daddr, saddr);
1317 return __xfrm6_state_addr_check(x, daddr, saddr);
1322 static __inline__ int
1323 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1324 unsigned short family)
1328 return __xfrm4_state_addr_check(x,
1329 (const xfrm_address_t *)&fl->u.ip4.daddr,
1330 (const xfrm_address_t *)&fl->u.ip4.saddr);
1332 return __xfrm6_state_addr_check(x,
1333 (const xfrm_address_t *)&fl->u.ip6.daddr,
1334 (const xfrm_address_t *)&fl->u.ip6.saddr);
1339 static inline int xfrm_state_kern(const struct xfrm_state *x)
1341 return atomic_read(&x->tunnel_users);
1344 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1346 return (!userproto || proto == userproto ||
1347 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1348 proto == IPPROTO_ESP ||
1349 proto == IPPROTO_COMP)));
1353 * xfrm algorithm information
1355 struct xfrm_algo_aead_info {
1360 struct xfrm_algo_auth_info {
1365 struct xfrm_algo_encr_info {
1371 struct xfrm_algo_comp_info {
1375 struct xfrm_algo_desc {
1379 u8 pfkey_supported:1;
1381 struct xfrm_algo_aead_info aead;
1382 struct xfrm_algo_auth_info auth;
1383 struct xfrm_algo_encr_info encr;
1384 struct xfrm_algo_comp_info comp;
1386 struct sadb_alg desc;
1389 /* XFRM protocol handlers. */
1390 struct xfrm4_protocol {
1391 int (*handler)(struct sk_buff *skb);
1392 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1394 int (*cb_handler)(struct sk_buff *skb, int err);
1395 int (*err_handler)(struct sk_buff *skb, u32 info);
1397 struct xfrm4_protocol __rcu *next;
1401 struct xfrm6_protocol {
1402 int (*handler)(struct sk_buff *skb);
1403 int (*cb_handler)(struct sk_buff *skb, int err);
1404 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1405 u8 type, u8 code, int offset, __be32 info);
1407 struct xfrm6_protocol __rcu *next;
1411 /* XFRM tunnel handlers. */
1412 struct xfrm_tunnel {
1413 int (*handler)(struct sk_buff *skb);
1414 int (*err_handler)(struct sk_buff *skb, u32 info);
1416 struct xfrm_tunnel __rcu *next;
1420 struct xfrm6_tunnel {
1421 int (*handler)(struct sk_buff *skb);
1422 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1423 u8 type, u8 code, int offset, __be32 info);
1424 struct xfrm6_tunnel __rcu *next;
1428 void xfrm_init(void);
1429 void xfrm4_init(void);
1430 int xfrm_state_init(struct net *net);
1431 void xfrm_state_fini(struct net *net);
1432 void xfrm4_state_init(void);
1433 void xfrm4_protocol_init(void);
1435 int xfrm6_init(void);
1436 void xfrm6_fini(void);
1437 int xfrm6_state_init(void);
1438 void xfrm6_state_fini(void);
1439 int xfrm6_protocol_init(void);
1440 void xfrm6_protocol_fini(void);
1442 static inline int xfrm6_init(void)
1446 static inline void xfrm6_fini(void)
1452 #ifdef CONFIG_XFRM_STATISTICS
1453 int xfrm_proc_init(struct net *net);
1454 void xfrm_proc_fini(struct net *net);
1457 int xfrm_sysctl_init(struct net *net);
1458 #ifdef CONFIG_SYSCTL
1459 void xfrm_sysctl_fini(struct net *net);
1461 static inline void xfrm_sysctl_fini(struct net *net)
1466 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1467 struct xfrm_address_filter *filter);
1468 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1469 int (*func)(struct xfrm_state *, int, void*), void *);
1470 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1471 struct xfrm_state *xfrm_state_alloc(struct net *net);
1472 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1473 const xfrm_address_t *saddr,
1474 const struct flowi *fl,
1475 struct xfrm_tmpl *tmpl,
1476 struct xfrm_policy *pol, int *err,
1477 unsigned short family);
1478 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1479 xfrm_address_t *daddr,
1480 xfrm_address_t *saddr,
1481 unsigned short family,
1482 u8 mode, u8 proto, u32 reqid);
1483 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1484 unsigned short family);
1485 int xfrm_state_check_expire(struct xfrm_state *x);
1486 void xfrm_state_insert(struct xfrm_state *x);
1487 int xfrm_state_add(struct xfrm_state *x);
1488 int xfrm_state_update(struct xfrm_state *x);
1489 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1490 const xfrm_address_t *daddr, __be32 spi,
1491 u8 proto, unsigned short family);
1492 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1493 const xfrm_address_t *daddr,
1494 const xfrm_address_t *saddr,
1496 unsigned short family);
1497 #ifdef CONFIG_XFRM_SUB_POLICY
1498 int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1499 unsigned short family, struct net *net);
1500 int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1501 unsigned short family);
1503 static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1504 int n, unsigned short family, struct net *net)
1509 static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1510 int n, unsigned short family)
1516 struct xfrmk_sadinfo {
1517 u32 sadhcnt; /* current hash bkts */
1518 u32 sadhmcnt; /* max allowed hash bkts */
1519 u32 sadcnt; /* current running count */
1522 struct xfrmk_spdinfo {
1533 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1534 int xfrm_state_delete(struct xfrm_state *x);
1535 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
1536 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1537 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1538 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1539 int xfrm_init_replay(struct xfrm_state *x);
1540 int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1541 int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1542 int xfrm_init_state(struct xfrm_state *x);
1543 int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1544 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1545 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1546 int xfrm_output_resume(struct sk_buff *skb, int err);
1547 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1548 int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1549 void xfrm_local_error(struct sk_buff *skb, int mtu);
1550 int xfrm4_extract_header(struct sk_buff *skb);
1551 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1552 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1554 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1555 int xfrm4_rcv(struct sk_buff *skb);
1556 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1558 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1560 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1561 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1562 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1563 return xfrm_input(skb, nexthdr, spi, 0);
1566 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1567 int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1568 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1569 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1570 int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1571 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1572 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1573 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1574 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1575 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1576 int xfrm6_extract_header(struct sk_buff *skb);
1577 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1578 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1580 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1581 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1582 int xfrm6_rcv(struct sk_buff *skb);
1583 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1584 xfrm_address_t *saddr, u8 proto);
1585 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1586 int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1587 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1588 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1589 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1590 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1591 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1592 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1593 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1594 int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
1595 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1596 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1597 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1601 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1602 int xfrm_user_policy(struct sock *sk, int optname,
1603 u8 __user *optval, int optlen);
1605 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1607 return -ENOPROTOOPT;
1610 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1612 /* should not happen */
1618 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1620 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1621 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1622 int (*func)(struct xfrm_policy *, int, int, void*),
1624 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1625 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1626 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1628 struct xfrm_selector *sel,
1629 struct xfrm_sec_ctx *ctx, int delete,
1631 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1632 u32 id, int delete, int *err);
1633 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1634 void xfrm_policy_hash_rebuild(struct net *net);
1635 u32 xfrm_get_acqseq(void);
1636 int verify_spi_info(u8 proto, u32 min, u32 max);
1637 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1638 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1639 u8 mode, u32 reqid, u8 proto,
1640 const xfrm_address_t *daddr,
1641 const xfrm_address_t *saddr, int create,
1642 unsigned short family);
1643 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1645 #ifdef CONFIG_XFRM_MIGRATE
1646 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1647 const struct xfrm_migrate *m, int num_bundles,
1648 const struct xfrm_kmaddress *k);
1649 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1650 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1651 struct xfrm_migrate *m);
1652 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1653 struct xfrm_migrate *m, int num_bundles,
1654 struct xfrm_kmaddress *k, struct net *net);
1657 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1658 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1659 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1660 xfrm_address_t *addr);
1662 void xfrm_input_init(void);
1663 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1665 void xfrm_probe_algs(void);
1666 int xfrm_count_pfkey_auth_supported(void);
1667 int xfrm_count_pfkey_enc_supported(void);
1668 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1669 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1670 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1671 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1672 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1673 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1674 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1675 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1676 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1679 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1680 const xfrm_address_t *b)
1682 return ipv6_addr_equal((const struct in6_addr *)a,
1683 (const struct in6_addr *)b);
1686 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1687 const xfrm_address_t *b,
1693 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1695 return xfrm6_addr_equal(a, b);
1699 static inline int xfrm_policy_id2dir(u32 index)
1705 static inline int xfrm_aevent_is_on(struct net *net)
1711 nlsk = rcu_dereference(net->xfrm.nlsk);
1713 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1718 static inline int xfrm_acquire_is_on(struct net *net)
1724 nlsk = rcu_dereference(net->xfrm.nlsk);
1726 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1733 static inline int aead_len(struct xfrm_algo_aead *alg)
1735 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1738 static inline int xfrm_alg_len(const struct xfrm_algo *alg)
1740 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1743 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1745 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1748 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1750 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1753 #ifdef CONFIG_XFRM_MIGRATE
1754 static inline int xfrm_replay_clone(struct xfrm_state *x,
1755 struct xfrm_state *orig)
1757 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1762 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1763 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1765 x->preplay_esn = kmemdup(x->replay_esn,
1766 xfrm_replay_state_esn_len(x->replay_esn),
1768 if (!x->preplay_esn) {
1769 kfree(x->replay_esn);
1776 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1778 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1782 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1784 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1787 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1789 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1792 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1795 for (i = 0; i < n; i++)
1796 xfrm_state_put(*(states + i));
1799 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1802 for (i = 0; i < n; i++)
1803 xfrm_state_delete(*(states + i));
1808 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1810 return skb->sp->xvec[skb->sp->len - 1];
1812 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1814 struct sec_path *sp = skb->sp;
1816 if (!sp || !sp->olen || sp->len != sp->olen)
1819 return &sp->ovec[sp->olen - 1];
1823 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1825 if (attrs[XFRMA_MARK])
1826 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1833 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1838 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1842 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1843 unsigned int family)
1845 bool tunnel = false;
1849 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1853 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1857 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1862 #endif /* _NET_XFRM_H */