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>
19 #include <net/route.h>
21 #include <net/ip6_fib.h>
23 #include <linux/interrupt.h>
25 #ifdef CONFIG_XFRM_STATISTICS
29 #define XFRM_PROTO_ESP 50
30 #define XFRM_PROTO_AH 51
31 #define XFRM_PROTO_COMP 108
32 #define XFRM_PROTO_IPIP 4
33 #define XFRM_PROTO_IPV6 41
34 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
35 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
37 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
38 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
39 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
40 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
41 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
43 #ifdef CONFIG_XFRM_STATISTICS
44 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
45 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
46 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
48 #define XFRM_INC_STATS(net, field) ((void)(net))
49 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
50 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
53 extern struct mutex xfrm_cfg_mutex
;
55 /* Organization of SPD aka "XFRM rules"
56 ------------------------------------
59 - policy rule, struct xfrm_policy (=SPD entry)
60 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
61 - instance of a transformer, struct xfrm_state (=SA)
62 - template to clone xfrm_state, struct xfrm_tmpl
64 SPD is plain linear list of xfrm_policy rules, ordered by priority.
65 (To be compatible with existing pfkeyv2 implementations,
66 many rules with priority of 0x7fffffff are allowed to exist and
67 such rules are ordered in an unpredictable way, thanks to bsd folks.)
69 Lookup is plain linear search until the first match with selector.
71 If "action" is "block", then we prohibit the flow, otherwise:
72 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
73 policy entry has list of up to XFRM_MAX_DEPTH transformations,
74 described by templates xfrm_tmpl. Each template is resolved
75 to a complete xfrm_state (see below) and we pack bundle of transformations
76 to a dst_entry returned to requestor.
78 dst -. xfrm .-> xfrm_state #1
79 |---. child .-> dst -. xfrm .-> xfrm_state #2
80 |---. child .-> dst -. xfrm .-> xfrm_state #3
83 Bundles are cached at xrfm_policy struct (field ->bundles).
86 Resolution of xrfm_tmpl
87 -----------------------
89 1. ->mode Mode: transport or tunnel
90 2. ->id.proto Protocol: AH/ESP/IPCOMP
91 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
92 Q: allow to resolve security gateway?
93 4. ->id.spi If not zero, static SPI.
94 5. ->saddr Local tunnel endpoint, ignored for transport mode.
95 6. ->algos List of allowed algos. Plain bitmask now.
96 Q: ealgos, aalgos, calgos. What a mess...
97 7. ->share Sharing mode.
98 Q: how to implement private sharing mode? To add struct sock* to
101 Having this template we search through SAD searching for entries
102 with appropriate mode/proto/algo, permitted by selector.
103 If no appropriate entry found, it is requested from key manager.
106 Q: How to find all the bundles referring to a physical path for
107 PMTU discovery? Seems, dst should contain list of all parents...
108 and enter to infinite locking hierarchy disaster.
109 No! It is easier, we will not search for them, let them find us.
110 We add genid to each dst plus pointer to genid of raw IP route,
111 pmtu disc will update pmtu on raw IP route and increase its genid.
112 dst_check() will see this for top level and trigger resyncing
113 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
116 struct xfrm_state_walk
{
117 struct list_head all
;
126 /* Full description of state of transformer. */
132 struct hlist_node gclist
;
133 struct hlist_node bydst
;
135 struct hlist_node bysrc
;
136 struct hlist_node byspi
;
142 struct xfrm_selector sel
;
146 /* Key manager bits */
147 struct xfrm_state_walk km
;
149 /* Parameters of this state. */
154 u8 aalgo
, ealgo
, calgo
;
157 xfrm_address_t saddr
;
162 struct xfrm_lifetime_cfg lft
;
164 /* Data for transformer */
165 struct xfrm_algo_auth
*aalg
;
166 struct xfrm_algo
*ealg
;
167 struct xfrm_algo
*calg
;
168 struct xfrm_algo_aead
*aead
;
170 /* Data for encapsulator */
171 struct xfrm_encap_tmpl
*encap
;
173 /* Data for care-of address */
174 xfrm_address_t
*coaddr
;
176 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
177 struct xfrm_state
*tunnel
;
179 /* If a tunnel, number of users + 1 */
180 atomic_t tunnel_users
;
182 /* State for replay detection */
183 struct xfrm_replay_state replay
;
185 /* Replay detection state at the time we sent the last notification */
186 struct xfrm_replay_state preplay
;
188 /* internal flag that only holds state for delayed aevent at the
193 /* Replay detection notification settings */
197 /* Replay detection notification timer */
198 struct timer_list rtimer
;
201 struct xfrm_stats stats
;
203 struct xfrm_lifetime_cur curlft
;
204 struct tasklet_hrtimer mtimer
;
207 unsigned long lastused
;
209 /* Reference to data common to all the instances of this
211 const struct xfrm_type
*type
;
212 struct xfrm_mode
*inner_mode
;
213 struct xfrm_mode
*inner_mode_iaf
;
214 struct xfrm_mode
*outer_mode
;
216 /* Security context */
217 struct xfrm_sec_ctx
*security
;
219 /* Private data of this transformer, format is opaque,
220 * interpreted by xfrm_type methods. */
224 static inline struct net
*xs_net(struct xfrm_state
*x
)
226 return read_pnet(&x
->xs_net
);
229 /* xflags - make enum if more show up */
230 #define XFRM_TIME_DEFER 1
241 /* callback structure passed from either netlink or pfkey */
260 struct xfrm_policy_afinfo
{
261 unsigned short family
;
262 struct dst_ops
*dst_ops
;
263 void (*garbage_collect
)(struct net
*net
);
264 struct dst_entry
*(*dst_lookup
)(struct net
*net
, int tos
,
265 xfrm_address_t
*saddr
,
266 xfrm_address_t
*daddr
);
267 int (*get_saddr
)(struct net
*net
, xfrm_address_t
*saddr
, xfrm_address_t
*daddr
);
268 struct dst_entry
*(*find_bundle
)(struct flowi
*fl
, struct xfrm_policy
*policy
);
269 void (*decode_session
)(struct sk_buff
*skb
,
272 int (*get_tos
)(struct flowi
*fl
);
273 int (*init_path
)(struct xfrm_dst
*path
,
274 struct dst_entry
*dst
,
276 int (*fill_dst
)(struct xfrm_dst
*xdst
,
277 struct net_device
*dev
,
281 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
282 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
283 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
284 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
287 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
288 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
289 extern int __xfrm_state_delete(struct xfrm_state
*x
);
291 struct xfrm_state_afinfo
{
295 struct module
*owner
;
296 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
297 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
298 int (*init_flags
)(struct xfrm_state
*x
);
299 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
300 struct xfrm_tmpl
*tmpl
,
301 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
302 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
303 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
304 int (*output
)(struct sk_buff
*skb
);
305 int (*extract_input
)(struct xfrm_state
*x
,
306 struct sk_buff
*skb
);
307 int (*extract_output
)(struct xfrm_state
*x
,
308 struct sk_buff
*skb
);
309 int (*transport_finish
)(struct sk_buff
*skb
,
313 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
314 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
316 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
320 struct module
*owner
;
323 #define XFRM_TYPE_NON_FRAGMENT 1
324 #define XFRM_TYPE_REPLAY_PROT 2
325 #define XFRM_TYPE_LOCAL_COADDR 4
326 #define XFRM_TYPE_REMOTE_COADDR 8
328 int (*init_state
)(struct xfrm_state
*x
);
329 void (*destructor
)(struct xfrm_state
*);
330 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
331 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
332 int (*reject
)(struct xfrm_state
*, struct sk_buff
*, struct flowi
*);
333 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
334 /* Estimate maximal size of result of transformation of a dgram */
335 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
338 extern int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
339 extern int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
343 * Remove encapsulation header.
345 * The IP header will be moved over the top of the encapsulation
348 * On entry, the transport header shall point to where the IP header
349 * should be and the network header shall be set to where the IP
350 * header currently is. skb->data shall point to the start of the
353 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
356 * This is the actual input entry point.
358 * For transport mode and equivalent this would be identical to
359 * input2 (which does not need to be set). While tunnel mode
360 * and equivalent would set this to the tunnel encapsulation function
361 * xfrm4_prepare_input that would in turn call input2.
363 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
366 * Add encapsulation header.
368 * On exit, the transport header will be set to the start of the
369 * encapsulation header to be filled in by x->type->output and
370 * the mac header will be set to the nextheader (protocol for
371 * IPv4) field of the extension header directly preceding the
372 * encapsulation header, or in its absence, that of the top IP
373 * header. The value of the network header will always point
374 * to the top IP header while skb->data will point to the payload.
376 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
379 * This is the actual output entry point.
381 * For transport mode and equivalent this would be identical to
382 * output2 (which does not need to be set). While tunnel mode
383 * and equivalent would set this to a tunnel encapsulation function
384 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
387 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
389 struct xfrm_state_afinfo
*afinfo
;
390 struct module
*owner
;
395 /* Flags for xfrm_mode. */
397 XFRM_MODE_FLAG_TUNNEL
= 1,
400 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
401 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
403 static inline int xfrm_af2proto(unsigned int family
)
415 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
417 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
418 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
419 return x
->inner_mode
;
421 return x
->inner_mode_iaf
;
425 /* id in template is interpreted as:
426 * daddr - destination of tunnel, may be zero for transport mode.
427 * spi - zero to acquire spi. Not zero if spi is static, then
428 * daddr must be fixed too.
429 * proto - AH/ESP/IPCOMP
433 /* Source address of tunnel. Ignored, if it is not a tunnel. */
434 xfrm_address_t saddr
;
436 unsigned short encap_family
;
440 /* Mode: transport, tunnel etc. */
443 /* Sharing mode: unique, this session only, this user only etc. */
446 /* May skip this transfomration if no SA is found */
449 /* Skip aalgos/ealgos/calgos checks. */
452 /* Bit mask of algos allowed for acquisition */
458 #define XFRM_MAX_DEPTH 6
460 struct xfrm_policy_walk_entry
{
461 struct list_head all
;
465 struct xfrm_policy_walk
{
466 struct xfrm_policy_walk_entry walk
;
475 struct hlist_node bydst
;
476 struct hlist_node byidx
;
478 /* This lock only affects elements except for entry. */
481 struct timer_list timer
;
485 struct xfrm_selector selector
;
486 struct xfrm_lifetime_cfg lft
;
487 struct xfrm_lifetime_cur curlft
;
488 struct dst_entry
*bundles
;
489 struct xfrm_policy_walk_entry walk
;
495 struct xfrm_sec_ctx
*security
;
496 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
499 static inline struct net
*xp_net(struct xfrm_policy
*xp
)
501 return read_pnet(&xp
->xp_net
);
504 struct xfrm_kmaddress
{
505 xfrm_address_t local
;
506 xfrm_address_t remote
;
511 struct xfrm_migrate
{
512 xfrm_address_t old_daddr
;
513 xfrm_address_t old_saddr
;
514 xfrm_address_t new_daddr
;
515 xfrm_address_t new_saddr
;
524 #define XFRM_KM_TIMEOUT 30
526 #define XFRM_REPLAY_SEQ 1
527 #define XFRM_REPLAY_OSEQ 2
528 #define XFRM_REPLAY_SEQ_MASK 3
530 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
531 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
533 /* default aevent timeout in units of 100ms */
534 #define XFRM_AE_ETIME 10
535 /* Async Event timer multiplier */
536 #define XFRM_AE_ETH_M 10
537 /* default seq threshold size */
538 #define XFRM_AE_SEQT_SIZE 2
541 struct list_head list
;
543 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
544 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
545 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
546 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
547 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
548 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
549 int (*migrate
)(struct xfrm_selector
*sel
, u8 dir
, u8 type
, struct xfrm_migrate
*m
, int num_bundles
, struct xfrm_kmaddress
*k
);
552 extern int xfrm_register_km(struct xfrm_mgr
*km
);
553 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
556 * This structure is used for the duration where packets are being
557 * transformed by IPsec. As soon as the packet leaves IPsec the
558 * area beyond the generic IP part may be overwritten.
562 struct inet_skb_parm h4
;
563 struct inet6_skb_parm h6
;
566 /* Sequence number for replay protection. */
573 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
576 * This structure is used by the afinfo prepare_input/prepare_output functions
577 * to transmit header information to the mode input/output functions.
579 struct xfrm_mode_skb_cb
{
581 struct inet_skb_parm h4
;
582 struct inet6_skb_parm h6
;
585 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
589 /* IP header length (excluding options or extension headers). */
592 /* TOS for IPv4, class for IPv6. */
595 /* TTL for IPv4, hop limitfor IPv6. */
598 /* Protocol for IPv4, NH for IPv6. */
601 /* Option length for IPv4, zero for IPv6. */
604 /* Used by IPv6 only, zero for IPv4. */
608 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
611 * This structure is used by the input processing to locate the SPI and
612 * related information.
614 struct xfrm_spi_skb_cb
{
616 struct inet_skb_parm h4
;
617 struct inet6_skb_parm h6
;
620 unsigned int daddroff
;
624 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
626 /* Audit Information */
633 #ifdef CONFIG_AUDITSYSCALL
634 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
636 struct audit_buffer
*audit_buf
= NULL
;
638 if (audit_enabled
== 0)
640 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
641 AUDIT_MAC_IPSEC_EVENT
);
642 if (audit_buf
== NULL
)
644 audit_log_format(audit_buf
, "op=%s", op
);
648 static inline void xfrm_audit_helper_usrinfo(uid_t auid
, u32 ses
, u32 secid
,
649 struct audit_buffer
*audit_buf
)
654 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
656 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
657 audit_log_format(audit_buf
, " subj=%s", secctx
);
658 security_release_secctx(secctx
, secctx_len
);
660 audit_log_task_context(audit_buf
);
663 extern void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
664 u32 auid
, u32 ses
, u32 secid
);
665 extern void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
666 u32 auid
, u32 ses
, u32 secid
);
667 extern void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
668 u32 auid
, u32 ses
, u32 secid
);
669 extern void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
670 u32 auid
, u32 ses
, u32 secid
);
671 extern void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
672 struct sk_buff
*skb
);
673 extern void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
674 extern void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
675 __be32 net_spi
, __be32 net_seq
);
676 extern void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
677 struct sk_buff
*skb
, u8 proto
);
680 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
681 u32 auid
, u32 ses
, u32 secid
)
685 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
686 u32 auid
, u32 ses
, u32 secid
)
690 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
691 u32 auid
, u32 ses
, u32 secid
)
695 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
696 u32 auid
, u32 ses
, u32 secid
)
700 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
705 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
710 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
711 __be32 net_spi
, __be32 net_seq
)
715 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
716 struct sk_buff
*skb
, u8 proto
)
719 #endif /* CONFIG_AUDITSYSCALL */
721 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
723 if (likely(policy
!= NULL
))
724 atomic_inc(&policy
->refcnt
);
727 extern void xfrm_policy_destroy(struct xfrm_policy
*policy
);
729 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
731 if (atomic_dec_and_test(&policy
->refcnt
))
732 xfrm_policy_destroy(policy
);
735 #ifdef CONFIG_XFRM_SUB_POLICY
736 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
739 for (i
= npols
- 1; i
>= 0; --i
)
740 xfrm_pol_put(pols
[i
]);
743 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
745 xfrm_pol_put(pols
[0]);
749 extern void __xfrm_state_destroy(struct xfrm_state
*);
751 static inline void __xfrm_state_put(struct xfrm_state
*x
)
753 atomic_dec(&x
->refcnt
);
756 static inline void xfrm_state_put(struct xfrm_state
*x
)
758 if (atomic_dec_and_test(&x
->refcnt
))
759 __xfrm_state_destroy(x
);
762 static inline void xfrm_state_hold(struct xfrm_state
*x
)
764 atomic_inc(&x
->refcnt
);
767 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
774 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
775 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
778 if (memcmp(a1
, a2
, pdw
<< 2))
784 mask
= htonl((0xffffffff) << (32 - pbi
));
786 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
794 __be16
xfrm_flowi_sport(struct flowi
*fl
)
800 case IPPROTO_UDPLITE
:
802 port
= fl
->fl_ip_sport
;
806 port
= htons(fl
->fl_icmp_type
);
809 port
= htons(fl
->fl_mh_type
);
818 __be16
xfrm_flowi_dport(struct flowi
*fl
)
824 case IPPROTO_UDPLITE
:
826 port
= fl
->fl_ip_dport
;
830 port
= htons(fl
->fl_icmp_code
);
838 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
839 unsigned short family
);
841 #ifdef CONFIG_SECURITY_NETWORK_XFRM
842 /* If neither has a context --> match
843 * Otherwise, both must have a context and the sids, doi, alg must match
845 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
847 return ((!s1
&& !s2
) ||
849 (s1
->ctx_sid
== s2
->ctx_sid
) &&
850 (s1
->ctx_doi
== s2
->ctx_doi
) &&
851 (s1
->ctx_alg
== s2
->ctx_alg
)));
854 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
860 /* A struct encoding bundle of transformations to apply to some set of flow.
862 * dst->child points to the next element of bundle.
863 * dst->xfrm points to an instanse of transformer.
865 * Due to unfortunate limitations of current routing cache, which we
866 * have no time to fix, it mirrors struct rtable and bound to the same
867 * routing key, including saddr,daddr. However, we can have many of
868 * bundles differing by session id. All the bundles grow from a parent
873 struct dst_entry dst
;
877 struct dst_entry
*route
;
878 #ifdef CONFIG_XFRM_SUB_POLICY
879 struct flowi
*origin
;
880 struct xfrm_selector
*partner
;
883 u32 route_mtu_cached
;
884 u32 child_mtu_cached
;
890 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
892 dst_release(xdst
->route
);
893 if (likely(xdst
->u
.dst
.xfrm
))
894 xfrm_state_put(xdst
->u
.dst
.xfrm
);
895 #ifdef CONFIG_XFRM_SUB_POLICY
898 kfree(xdst
->partner
);
899 xdst
->partner
= NULL
;
904 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
909 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
912 static inline struct sec_path
*
913 secpath_get(struct sec_path
*sp
)
916 atomic_inc(&sp
->refcnt
);
920 extern void __secpath_destroy(struct sec_path
*sp
);
923 secpath_put(struct sec_path
*sp
)
925 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
926 __secpath_destroy(sp
);
929 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
932 secpath_reset(struct sk_buff
*skb
)
935 secpath_put(skb
->sp
);
941 xfrm_addr_any(xfrm_address_t
*addr
, unsigned short family
)
945 return addr
->a4
== 0;
947 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
953 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
955 return (tmpl
->saddr
.a4
&&
956 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
960 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
962 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
963 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
967 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
971 return __xfrm4_state_addr_cmp(tmpl
, x
);
973 return __xfrm6_state_addr_cmp(tmpl
, x
);
979 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
981 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
983 unsigned int family
, int reverse
)
985 struct net
*net
= dev_net(skb
->dev
);
986 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
988 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
989 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
991 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
992 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
993 __xfrm_policy_check(sk
, ndir
, skb
, family
);
996 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
998 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1001 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1003 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1006 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1008 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1011 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1012 struct sk_buff
*skb
)
1014 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1017 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1018 struct sk_buff
*skb
)
1020 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1023 extern int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1024 unsigned int family
, int reverse
);
1026 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1027 unsigned int family
)
1029 return __xfrm_decode_session(skb
, fl
, family
, 0);
1032 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1034 unsigned int family
)
1036 return __xfrm_decode_session(skb
, fl
, family
, 1);
1039 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1041 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1043 struct net
*net
= dev_net(skb
->dev
);
1045 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1046 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1047 __xfrm_route_forward(skb
, family
);
1050 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1052 return xfrm_route_forward(skb
, AF_INET
);
1055 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1057 return xfrm_route_forward(skb
, AF_INET6
);
1060 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
1062 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1064 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1065 return __xfrm_sk_clone_policy(sk
);
1069 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1071 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1073 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1074 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1075 sk
->sk_policy
[0] = NULL
;
1077 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1078 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1079 sk
->sk_policy
[1] = NULL
;
1085 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1086 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1087 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1088 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1089 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1093 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1097 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1101 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1103 unsigned int family
)
1107 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1108 struct sk_buff
*skb
)
1112 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1113 struct sk_buff
*skb
)
1120 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
1124 return (xfrm_address_t
*)&fl
->fl4_dst
;
1126 return (xfrm_address_t
*)&fl
->fl6_dst
;
1132 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
1136 return (xfrm_address_t
*)&fl
->fl4_src
;
1138 return (xfrm_address_t
*)&fl
->fl6_src
;
1144 void xfrm_flowi_addr_get(struct flowi
*fl
,
1145 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1146 unsigned short family
)
1150 memcpy(&saddr
->a4
, &fl
->fl4_src
, sizeof(saddr
->a4
));
1151 memcpy(&daddr
->a4
, &fl
->fl4_dst
, sizeof(daddr
->a4
));
1154 ipv6_addr_copy((struct in6_addr
*)&saddr
->a6
, &fl
->fl6_src
);
1155 ipv6_addr_copy((struct in6_addr
*)&daddr
->a6
, &fl
->fl6_dst
);
1160 static __inline__
int
1161 __xfrm4_state_addr_check(struct xfrm_state
*x
,
1162 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
1164 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1165 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1170 static __inline__
int
1171 __xfrm6_state_addr_check(struct xfrm_state
*x
,
1172 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
1174 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1175 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
1176 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1177 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1182 static __inline__
int
1183 xfrm_state_addr_check(struct xfrm_state
*x
,
1184 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1185 unsigned short family
)
1189 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1191 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1196 static __inline__
int
1197 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
1198 unsigned short family
)
1202 return __xfrm4_state_addr_check(x
,
1203 (xfrm_address_t
*)&fl
->fl4_dst
,
1204 (xfrm_address_t
*)&fl
->fl4_src
);
1206 return __xfrm6_state_addr_check(x
,
1207 (xfrm_address_t
*)&fl
->fl6_dst
,
1208 (xfrm_address_t
*)&fl
->fl6_src
);
1213 static inline int xfrm_state_kern(struct xfrm_state
*x
)
1215 return atomic_read(&x
->tunnel_users
);
1218 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1220 return (!userproto
|| proto
== userproto
||
1221 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1222 proto
== IPPROTO_ESP
||
1223 proto
== IPPROTO_COMP
)));
1227 * xfrm algorithm information
1229 struct xfrm_algo_aead_info
{
1233 struct xfrm_algo_auth_info
{
1238 struct xfrm_algo_encr_info
{
1243 struct xfrm_algo_comp_info
{
1247 struct xfrm_algo_desc
{
1252 struct xfrm_algo_aead_info aead
;
1253 struct xfrm_algo_auth_info auth
;
1254 struct xfrm_algo_encr_info encr
;
1255 struct xfrm_algo_comp_info comp
;
1257 struct sadb_alg desc
;
1260 /* XFRM tunnel handlers. */
1261 struct xfrm_tunnel
{
1262 int (*handler
)(struct sk_buff
*skb
);
1263 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
1265 struct xfrm_tunnel
*next
;
1269 struct xfrm6_tunnel
{
1270 int (*handler
)(struct sk_buff
*skb
);
1271 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1272 u8 type
, u8 code
, int offset
, __be32 info
);
1273 struct xfrm6_tunnel
*next
;
1277 extern void xfrm_init(void);
1278 extern void xfrm4_init(int rt_hash_size
);
1279 extern int xfrm_state_init(struct net
*net
);
1280 extern void xfrm_state_fini(struct net
*net
);
1281 extern void xfrm4_state_init(void);
1283 extern int xfrm6_init(void);
1284 extern void xfrm6_fini(void);
1285 extern int xfrm6_state_init(void);
1286 extern void xfrm6_state_fini(void);
1288 static inline int xfrm6_init(void)
1292 static inline void xfrm6_fini(void)
1298 #ifdef CONFIG_XFRM_STATISTICS
1299 extern int xfrm_proc_init(struct net
*net
);
1300 extern void xfrm_proc_fini(struct net
*net
);
1303 extern int xfrm_sysctl_init(struct net
*net
);
1304 #ifdef CONFIG_SYSCTL
1305 extern void xfrm_sysctl_fini(struct net
*net
);
1307 static inline void xfrm_sysctl_fini(struct net
*net
)
1312 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1313 extern int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1314 int (*func
)(struct xfrm_state
*, int, void*), void *);
1315 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1316 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1317 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1318 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
1319 struct xfrm_policy
*pol
, int *err
,
1320 unsigned short family
);
1321 extern struct xfrm_state
* xfrm_stateonly_find(struct net
*net
,
1322 xfrm_address_t
*daddr
,
1323 xfrm_address_t
*saddr
,
1324 unsigned short family
,
1325 u8 mode
, u8 proto
, u32 reqid
);
1326 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1327 extern void xfrm_state_insert(struct xfrm_state
*x
);
1328 extern int xfrm_state_add(struct xfrm_state
*x
);
1329 extern int xfrm_state_update(struct xfrm_state
*x
);
1330 extern struct xfrm_state
*xfrm_state_lookup(struct net
*net
, xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
1331 extern struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
1332 #ifdef CONFIG_XFRM_SUB_POLICY
1333 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1334 int n
, unsigned short family
);
1335 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1336 int n
, unsigned short family
);
1338 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1339 int n
, unsigned short family
)
1344 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1345 int n
, unsigned short family
)
1351 struct xfrmk_sadinfo
{
1352 u32 sadhcnt
; /* current hash bkts */
1353 u32 sadhmcnt
; /* max allowed hash bkts */
1354 u32 sadcnt
; /* current running count */
1357 struct xfrmk_spdinfo
{
1368 extern struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 seq
);
1369 extern int xfrm_state_delete(struct xfrm_state
*x
);
1370 extern int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1371 extern void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1372 extern void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1373 extern int xfrm_replay_check(struct xfrm_state
*x
,
1374 struct sk_buff
*skb
, __be32 seq
);
1375 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
1376 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
1377 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1378 extern int xfrm_init_state(struct xfrm_state
*x
);
1379 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1380 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1382 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1383 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1384 extern int xfrm_output(struct sk_buff
*skb
);
1385 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1386 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1387 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1388 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1390 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1391 extern int xfrm4_rcv(struct sk_buff
*skb
);
1393 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1395 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1398 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1399 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1400 extern int xfrm4_output(struct sk_buff
*skb
);
1401 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1402 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1403 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1404 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1405 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1406 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1407 extern int xfrm6_rcv(struct sk_buff
*skb
);
1408 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1409 xfrm_address_t
*saddr
, u8 proto
);
1410 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1411 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1412 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
1413 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
1414 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
1415 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1416 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1417 extern int xfrm6_output(struct sk_buff
*skb
);
1418 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1422 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1423 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1425 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1427 return -ENOPROTOOPT
;
1430 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1432 /* should not happen */
1438 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1440 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1441 extern int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1442 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1443 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1444 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1445 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u8 type
, int dir
,
1446 struct xfrm_selector
*sel
,
1447 struct xfrm_sec_ctx
*ctx
, int delete,
1449 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u8
, int dir
, u32 id
, int delete, int *err
);
1450 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1451 u32
xfrm_get_acqseq(void);
1452 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1453 struct xfrm_state
* xfrm_find_acq(struct net
*net
, u8 mode
, u32 reqid
, u8 proto
,
1454 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1455 int create
, unsigned short family
);
1456 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1457 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
1458 struct flowi
*fl
, int family
, int strict
);
1460 #ifdef CONFIG_XFRM_MIGRATE
1461 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1462 struct xfrm_migrate
*m
, int num_bundles
,
1463 struct xfrm_kmaddress
*k
);
1464 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1465 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1466 struct xfrm_migrate
*m
);
1467 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1468 struct xfrm_migrate
*m
, int num_bundles
,
1469 struct xfrm_kmaddress
*k
);
1472 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1473 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1474 extern int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1476 extern void xfrm_input_init(void);
1477 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1479 extern void xfrm_probe_algs(void);
1480 extern int xfrm_count_auth_supported(void);
1481 extern int xfrm_count_enc_supported(void);
1482 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1483 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1484 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1485 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1486 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1487 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1488 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1489 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1490 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(char *name
, int icv_len
,
1495 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1498 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1504 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1506 return ipv6_addr_cmp((struct in6_addr
*)a
,
1507 (struct in6_addr
*)b
);
1511 static inline int xfrm_policy_id2dir(u32 index
)
1517 static inline int xfrm_aevent_is_on(struct net
*net
)
1523 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1525 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1531 static inline int xfrm_alg_len(struct xfrm_algo
*alg
)
1533 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1536 static inline int xfrm_alg_auth_len(struct xfrm_algo_auth
*alg
)
1538 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1541 #ifdef CONFIG_XFRM_MIGRATE
1542 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1544 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1547 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1549 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1552 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1555 for (i
= 0; i
< n
; i
++)
1556 xfrm_state_put(*(states
+ i
));
1559 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1562 for (i
= 0; i
< n
; i
++)
1563 xfrm_state_delete(*(states
+ i
));
1568 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1570 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1574 #endif /* _NET_XFRM_H */