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>
22 #ifdef CONFIG_XFRM_STATISTICS
26 #define XFRM_PROTO_ESP 50
27 #define XFRM_PROTO_AH 51
28 #define XFRM_PROTO_COMP 108
29 #define XFRM_PROTO_IPIP 4
30 #define XFRM_PROTO_IPV6 41
31 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
32 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
34 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
35 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
36 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
37 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
38 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
40 #ifdef CONFIG_XFRM_STATISTICS
41 DECLARE_SNMP_STAT(struct linux_xfrm_mib
, xfrm_statistics
);
42 #define XFRM_INC_STATS(field) SNMP_INC_STATS(xfrm_statistics, field)
43 #define XFRM_INC_STATS_BH(field) SNMP_INC_STATS_BH(xfrm_statistics, field)
44 #define XFRM_INC_STATS_USER(field) SNMP_INC_STATS_USER(xfrm_statistics, field)
46 #define XFRM_INC_STATS(field)
47 #define XFRM_INC_STATS_BH(field)
48 #define XFRM_INC_STATS_USER(field)
51 extern struct sock
*xfrm_nl
;
52 extern u32 sysctl_xfrm_aevent_etime
;
53 extern u32 sysctl_xfrm_aevent_rseqth
;
54 extern int sysctl_xfrm_larval_drop
;
55 extern u32 sysctl_xfrm_acq_expires
;
57 extern struct mutex xfrm_cfg_mutex
;
59 /* Organization of SPD aka "XFRM rules"
60 ------------------------------------
63 - policy rule, struct xfrm_policy (=SPD entry)
64 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
65 - instance of a transformer, struct xfrm_state (=SA)
66 - template to clone xfrm_state, struct xfrm_tmpl
68 SPD is plain linear list of xfrm_policy rules, ordered by priority.
69 (To be compatible with existing pfkeyv2 implementations,
70 many rules with priority of 0x7fffffff are allowed to exist and
71 such rules are ordered in an unpredictable way, thanks to bsd folks.)
73 Lookup is plain linear search until the first match with selector.
75 If "action" is "block", then we prohibit the flow, otherwise:
76 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
77 policy entry has list of up to XFRM_MAX_DEPTH transformations,
78 described by templates xfrm_tmpl. Each template is resolved
79 to a complete xfrm_state (see below) and we pack bundle of transformations
80 to a dst_entry returned to requestor.
82 dst -. xfrm .-> xfrm_state #1
83 |---. child .-> dst -. xfrm .-> xfrm_state #2
84 |---. child .-> dst -. xfrm .-> xfrm_state #3
87 Bundles are cached at xrfm_policy struct (field ->bundles).
90 Resolution of xrfm_tmpl
91 -----------------------
93 1. ->mode Mode: transport or tunnel
94 2. ->id.proto Protocol: AH/ESP/IPCOMP
95 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
96 Q: allow to resolve security gateway?
97 4. ->id.spi If not zero, static SPI.
98 5. ->saddr Local tunnel endpoint, ignored for transport mode.
99 6. ->algos List of allowed algos. Plain bitmask now.
100 Q: ealgos, aalgos, calgos. What a mess...
101 7. ->share Sharing mode.
102 Q: how to implement private sharing mode? To add struct sock* to
105 Having this template we search through SAD searching for entries
106 with appropriate mode/proto/algo, permitted by selector.
107 If no appropriate entry found, it is requested from key manager.
110 Q: How to find all the bundles referring to a physical path for
111 PMTU discovery? Seems, dst should contain list of all parents...
112 and enter to infinite locking hierarchy disaster.
113 No! It is easier, we will not search for them, let them find us.
114 We add genid to each dst plus pointer to genid of raw IP route,
115 pmtu disc will update pmtu on raw IP route and increase its genid.
116 dst_check() will see this for top level and trigger resyncing
117 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
120 struct xfrm_state_walk
{
121 struct list_head all
;
130 /* Full description of state of transformer. */
137 struct hlist_node gclist
;
138 struct hlist_node bydst
;
140 struct hlist_node bysrc
;
141 struct hlist_node byspi
;
147 struct xfrm_selector sel
;
151 /* Key manager bits */
152 struct xfrm_state_walk km
;
154 /* Parameters of this state. */
159 u8 aalgo
, ealgo
, calgo
;
162 xfrm_address_t saddr
;
167 struct xfrm_lifetime_cfg lft
;
169 /* Data for transformer */
170 struct xfrm_algo
*aalg
;
171 struct xfrm_algo
*ealg
;
172 struct xfrm_algo
*calg
;
173 struct xfrm_algo_aead
*aead
;
175 /* Data for encapsulator */
176 struct xfrm_encap_tmpl
*encap
;
178 /* Data for care-of address */
179 xfrm_address_t
*coaddr
;
181 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
182 struct xfrm_state
*tunnel
;
184 /* If a tunnel, number of users + 1 */
185 atomic_t tunnel_users
;
187 /* State for replay detection */
188 struct xfrm_replay_state replay
;
190 /* Replay detection state at the time we sent the last notification */
191 struct xfrm_replay_state preplay
;
193 /* internal flag that only holds state for delayed aevent at the
198 /* Replay detection notification settings */
202 /* Replay detection notification timer */
203 struct timer_list rtimer
;
206 struct xfrm_stats stats
;
208 struct xfrm_lifetime_cur curlft
;
209 struct timer_list timer
;
212 unsigned long lastused
;
214 /* Reference to data common to all the instances of this
216 const struct xfrm_type
*type
;
217 struct xfrm_mode
*inner_mode
;
218 struct xfrm_mode
*inner_mode_iaf
;
219 struct xfrm_mode
*outer_mode
;
221 /* Security context */
222 struct xfrm_sec_ctx
*security
;
224 /* Private data of this transformer, format is opaque,
225 * interpreted by xfrm_type methods. */
229 static inline struct net
*xs_net(struct xfrm_state
*x
)
231 return read_pnet(&x
->xs_net
);
234 /* xflags - make enum if more show up */
235 #define XFRM_TIME_DEFER 1
246 /* callback structure passed from either netlink or pfkey */
265 struct xfrm_policy_afinfo
{
266 unsigned short family
;
267 struct dst_ops
*dst_ops
;
268 void (*garbage_collect
)(void);
269 struct dst_entry
*(*dst_lookup
)(int tos
, xfrm_address_t
*saddr
,
270 xfrm_address_t
*daddr
);
271 int (*get_saddr
)(xfrm_address_t
*saddr
, xfrm_address_t
*daddr
);
272 struct dst_entry
*(*find_bundle
)(struct flowi
*fl
, struct xfrm_policy
*policy
);
273 void (*decode_session
)(struct sk_buff
*skb
,
276 int (*get_tos
)(struct flowi
*fl
);
277 int (*init_path
)(struct xfrm_dst
*path
,
278 struct dst_entry
*dst
,
280 int (*fill_dst
)(struct xfrm_dst
*xdst
,
281 struct net_device
*dev
);
284 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
285 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
286 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
287 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
290 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
291 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
292 extern int __xfrm_state_delete(struct xfrm_state
*x
);
294 struct xfrm_state_afinfo
{
298 struct module
*owner
;
299 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
300 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
301 int (*init_flags
)(struct xfrm_state
*x
);
302 void (*init_tempsel
)(struct xfrm_state
*x
, struct flowi
*fl
,
303 struct xfrm_tmpl
*tmpl
,
304 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
305 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
306 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
307 int (*output
)(struct sk_buff
*skb
);
308 int (*extract_input
)(struct xfrm_state
*x
,
309 struct sk_buff
*skb
);
310 int (*extract_output
)(struct xfrm_state
*x
,
311 struct sk_buff
*skb
);
312 int (*transport_finish
)(struct sk_buff
*skb
,
316 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
317 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
319 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
324 struct module
*owner
;
327 #define XFRM_TYPE_NON_FRAGMENT 1
328 #define XFRM_TYPE_REPLAY_PROT 2
329 #define XFRM_TYPE_LOCAL_COADDR 4
330 #define XFRM_TYPE_REMOTE_COADDR 8
332 int (*init_state
)(struct xfrm_state
*x
);
333 void (*destructor
)(struct xfrm_state
*);
334 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
335 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
336 int (*reject
)(struct xfrm_state
*, struct sk_buff
*, struct flowi
*);
337 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
338 /* Estimate maximal size of result of transformation of a dgram */
339 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
342 extern int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
343 extern int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
347 * Remove encapsulation header.
349 * The IP header will be moved over the top of the encapsulation
352 * On entry, the transport header shall point to where the IP header
353 * should be and the network header shall be set to where the IP
354 * header currently is. skb->data shall point to the start of the
357 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
360 * This is the actual input entry point.
362 * For transport mode and equivalent this would be identical to
363 * input2 (which does not need to be set). While tunnel mode
364 * and equivalent would set this to the tunnel encapsulation function
365 * xfrm4_prepare_input that would in turn call input2.
367 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
370 * Add encapsulation header.
372 * On exit, the transport header will be set to the start of the
373 * encapsulation header to be filled in by x->type->output and
374 * the mac header will be set to the nextheader (protocol for
375 * IPv4) field of the extension header directly preceding the
376 * encapsulation header, or in its absence, that of the top IP
377 * header. The value of the network header will always point
378 * to the top IP header while skb->data will point to the payload.
380 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
383 * This is the actual output entry point.
385 * For transport mode and equivalent this would be identical to
386 * output2 (which does not need to be set). While tunnel mode
387 * and equivalent would set this to a tunnel encapsulation function
388 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
391 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
393 struct xfrm_state_afinfo
*afinfo
;
394 struct module
*owner
;
399 /* Flags for xfrm_mode. */
401 XFRM_MODE_FLAG_TUNNEL
= 1,
404 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
405 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
407 static inline int xfrm_af2proto(unsigned int family
)
419 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
421 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
422 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
423 return x
->inner_mode
;
425 return x
->inner_mode_iaf
;
430 /* id in template is interpreted as:
431 * daddr - destination of tunnel, may be zero for transport mode.
432 * spi - zero to acquire spi. Not zero if spi is static, then
433 * daddr must be fixed too.
434 * proto - AH/ESP/IPCOMP
438 /* Source address of tunnel. Ignored, if it is not a tunnel. */
439 xfrm_address_t saddr
;
441 unsigned short encap_family
;
445 /* Mode: transport, tunnel etc. */
448 /* Sharing mode: unique, this session only, this user only etc. */
451 /* May skip this transfomration if no SA is found */
454 /* Skip aalgos/ealgos/calgos checks. */
457 /* Bit mask of algos allowed for acquisition */
463 #define XFRM_MAX_DEPTH 6
465 struct xfrm_policy_walk_entry
{
466 struct list_head all
;
470 struct xfrm_policy_walk
{
471 struct xfrm_policy_walk_entry walk
;
481 struct hlist_node bydst
;
482 struct hlist_node byidx
;
484 /* This lock only affects elements except for entry. */
487 struct timer_list timer
;
491 struct xfrm_selector selector
;
492 struct xfrm_lifetime_cfg lft
;
493 struct xfrm_lifetime_cur curlft
;
494 struct dst_entry
*bundles
;
495 struct xfrm_policy_walk_entry walk
;
501 struct xfrm_sec_ctx
*security
;
502 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
505 static inline struct net
*xp_net(struct xfrm_policy
*xp
)
507 return read_pnet(&xp
->xp_net
);
510 struct xfrm_kmaddress
{
511 xfrm_address_t local
;
512 xfrm_address_t remote
;
517 struct xfrm_migrate
{
518 xfrm_address_t old_daddr
;
519 xfrm_address_t old_saddr
;
520 xfrm_address_t new_daddr
;
521 xfrm_address_t new_saddr
;
530 #define XFRM_KM_TIMEOUT 30
532 #define XFRM_REPLAY_SEQ 1
533 #define XFRM_REPLAY_OSEQ 2
534 #define XFRM_REPLAY_SEQ_MASK 3
536 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
537 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
539 /* default aevent timeout in units of 100ms */
540 #define XFRM_AE_ETIME 10
541 /* Async Event timer multiplier */
542 #define XFRM_AE_ETH_M 10
543 /* default seq threshold size */
544 #define XFRM_AE_SEQT_SIZE 2
548 struct list_head list
;
550 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
551 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
552 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
553 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
554 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
555 int (*report
)(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
556 int (*migrate
)(struct xfrm_selector
*sel
, u8 dir
, u8 type
, struct xfrm_migrate
*m
, int num_bundles
, struct xfrm_kmaddress
*k
);
559 extern int xfrm_register_km(struct xfrm_mgr
*km
);
560 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
563 * This structure is used for the duration where packets are being
564 * transformed by IPsec. As soon as the packet leaves IPsec the
565 * area beyond the generic IP part may be overwritten.
569 struct inet_skb_parm h4
;
570 struct inet6_skb_parm h6
;
573 /* Sequence number for replay protection. */
580 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
583 * This structure is used by the afinfo prepare_input/prepare_output functions
584 * to transmit header information to the mode input/output functions.
586 struct xfrm_mode_skb_cb
{
588 struct inet_skb_parm h4
;
589 struct inet6_skb_parm h6
;
592 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
596 /* IP header length (excluding options or extension headers). */
599 /* TOS for IPv4, class for IPv6. */
602 /* TTL for IPv4, hop limitfor IPv6. */
605 /* Protocol for IPv4, NH for IPv6. */
608 /* Option length for IPv4, zero for IPv6. */
611 /* Used by IPv6 only, zero for IPv4. */
615 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
618 * This structure is used by the input processing to locate the SPI and
619 * related information.
621 struct xfrm_spi_skb_cb
{
623 struct inet_skb_parm h4
;
624 struct inet6_skb_parm h6
;
627 unsigned int daddroff
;
631 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
633 /* Audit Information */
641 #ifdef CONFIG_AUDITSYSCALL
642 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
644 struct audit_buffer
*audit_buf
= NULL
;
646 if (audit_enabled
== 0)
648 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
649 AUDIT_MAC_IPSEC_EVENT
);
650 if (audit_buf
== NULL
)
652 audit_log_format(audit_buf
, "op=%s", op
);
656 static inline void xfrm_audit_helper_usrinfo(uid_t auid
, u32 ses
, u32 secid
,
657 struct audit_buffer
*audit_buf
)
662 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
664 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
665 audit_log_format(audit_buf
, " subj=%s", secctx
);
666 security_release_secctx(secctx
, secctx_len
);
668 audit_log_task_context(audit_buf
);
671 extern void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
672 u32 auid
, u32 ses
, u32 secid
);
673 extern void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
674 u32 auid
, u32 ses
, u32 secid
);
675 extern void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
676 u32 auid
, u32 ses
, u32 secid
);
677 extern void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
678 u32 auid
, u32 ses
, u32 secid
);
679 extern void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
680 struct sk_buff
*skb
);
681 extern void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
682 extern void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
683 __be32 net_spi
, __be32 net_seq
);
684 extern void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
685 struct sk_buff
*skb
, u8 proto
);
688 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
689 u32 auid
, u32 ses
, u32 secid
)
693 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
694 u32 auid
, u32 ses
, u32 secid
)
698 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
699 u32 auid
, u32 ses
, u32 secid
)
703 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
704 u32 auid
, u32 ses
, u32 secid
)
708 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
713 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
718 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
719 __be32 net_spi
, __be32 net_seq
)
723 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
724 struct sk_buff
*skb
, u8 proto
)
727 #endif /* CONFIG_AUDITSYSCALL */
729 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
731 if (likely(policy
!= NULL
))
732 atomic_inc(&policy
->refcnt
);
735 extern void xfrm_policy_destroy(struct xfrm_policy
*policy
);
737 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
739 if (atomic_dec_and_test(&policy
->refcnt
))
740 xfrm_policy_destroy(policy
);
743 #ifdef CONFIG_XFRM_SUB_POLICY
744 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
747 for (i
= npols
- 1; i
>= 0; --i
)
748 xfrm_pol_put(pols
[i
]);
751 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
753 xfrm_pol_put(pols
[0]);
757 extern void __xfrm_state_destroy(struct xfrm_state
*);
759 static inline void __xfrm_state_put(struct xfrm_state
*x
)
761 atomic_dec(&x
->refcnt
);
764 static inline void xfrm_state_put(struct xfrm_state
*x
)
766 if (atomic_dec_and_test(&x
->refcnt
))
767 __xfrm_state_destroy(x
);
770 static inline void xfrm_state_hold(struct xfrm_state
*x
)
772 atomic_inc(&x
->refcnt
);
775 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
782 pdw
= prefixlen
>> 5; /* num of whole __u32 in prefix */
783 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
786 if (memcmp(a1
, a2
, pdw
<< 2))
792 mask
= htonl((0xffffffff) << (32 - pbi
));
794 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
802 __be16
xfrm_flowi_sport(struct flowi
*fl
)
808 case IPPROTO_UDPLITE
:
810 port
= fl
->fl_ip_sport
;
814 port
= htons(fl
->fl_icmp_type
);
817 port
= htons(fl
->fl_mh_type
);
826 __be16
xfrm_flowi_dport(struct flowi
*fl
)
832 case IPPROTO_UDPLITE
:
834 port
= fl
->fl_ip_dport
;
838 port
= htons(fl
->fl_icmp_code
);
846 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
847 unsigned short family
);
849 #ifdef CONFIG_SECURITY_NETWORK_XFRM
850 /* If neither has a context --> match
851 * Otherwise, both must have a context and the sids, doi, alg must match
853 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
855 return ((!s1
&& !s2
) ||
857 (s1
->ctx_sid
== s2
->ctx_sid
) &&
858 (s1
->ctx_doi
== s2
->ctx_doi
) &&
859 (s1
->ctx_alg
== s2
->ctx_alg
)));
862 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
868 /* A struct encoding bundle of transformations to apply to some set of flow.
870 * dst->child points to the next element of bundle.
871 * dst->xfrm points to an instanse of transformer.
873 * Due to unfortunate limitations of current routing cache, which we
874 * have no time to fix, it mirrors struct rtable and bound to the same
875 * routing key, including saddr,daddr. However, we can have many of
876 * bundles differing by session id. All the bundles grow from a parent
882 struct dst_entry dst
;
886 struct dst_entry
*route
;
887 #ifdef CONFIG_XFRM_SUB_POLICY
888 struct flowi
*origin
;
889 struct xfrm_selector
*partner
;
892 u32 route_mtu_cached
;
893 u32 child_mtu_cached
;
899 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
901 dst_release(xdst
->route
);
902 if (likely(xdst
->u
.dst
.xfrm
))
903 xfrm_state_put(xdst
->u
.dst
.xfrm
);
904 #ifdef CONFIG_XFRM_SUB_POLICY
907 kfree(xdst
->partner
);
908 xdst
->partner
= NULL
;
913 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
919 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
922 static inline struct sec_path
*
923 secpath_get(struct sec_path
*sp
)
926 atomic_inc(&sp
->refcnt
);
930 extern void __secpath_destroy(struct sec_path
*sp
);
933 secpath_put(struct sec_path
*sp
)
935 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
936 __secpath_destroy(sp
);
939 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
942 secpath_reset(struct sk_buff
*skb
)
945 secpath_put(skb
->sp
);
951 xfrm_addr_any(xfrm_address_t
*addr
, unsigned short family
)
955 return addr
->a4
== 0;
957 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
963 __xfrm4_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
965 return (tmpl
->saddr
.a4
&&
966 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
970 __xfrm6_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
)
972 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
973 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
977 xfrm_state_addr_cmp(struct xfrm_tmpl
*tmpl
, struct xfrm_state
*x
, unsigned short family
)
981 return __xfrm4_state_addr_cmp(tmpl
, x
);
983 return __xfrm6_state_addr_cmp(tmpl
, x
);
989 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
991 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
993 unsigned int family
, int reverse
)
995 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
997 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
998 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1000 return (!init_net
.xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1001 (skb
->dst
->flags
& DST_NOPOLICY
) ||
1002 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1005 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1007 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1010 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1012 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1015 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1017 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1020 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1021 struct sk_buff
*skb
)
1023 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1026 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1027 struct sk_buff
*skb
)
1029 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1032 extern int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1033 unsigned int family
, int reverse
);
1035 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1036 unsigned int family
)
1038 return __xfrm_decode_session(skb
, fl
, family
, 0);
1041 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1043 unsigned int family
)
1045 return __xfrm_decode_session(skb
, fl
, family
, 1);
1048 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1050 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1052 return !init_net
.xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1053 (skb
->dst
->flags
& DST_NOXFRM
) ||
1054 __xfrm_route_forward(skb
, family
);
1057 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1059 return xfrm_route_forward(skb
, AF_INET
);
1062 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1064 return xfrm_route_forward(skb
, AF_INET6
);
1067 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
1069 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1071 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1072 return __xfrm_sk_clone_policy(sk
);
1076 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1078 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1080 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1081 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1082 sk
->sk_policy
[0] = NULL
;
1084 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1085 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1086 sk
->sk_policy
[1] = NULL
;
1092 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1093 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1094 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1095 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1096 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1100 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1104 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1108 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1110 unsigned int family
)
1114 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1115 struct sk_buff
*skb
)
1119 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1120 struct sk_buff
*skb
)
1127 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
1131 return (xfrm_address_t
*)&fl
->fl4_dst
;
1133 return (xfrm_address_t
*)&fl
->fl6_dst
;
1139 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
1143 return (xfrm_address_t
*)&fl
->fl4_src
;
1145 return (xfrm_address_t
*)&fl
->fl6_src
;
1151 void xfrm_flowi_addr_get(struct flowi
*fl
,
1152 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1153 unsigned short family
)
1157 memcpy(&saddr
->a4
, &fl
->fl4_src
, sizeof(saddr
->a4
));
1158 memcpy(&daddr
->a4
, &fl
->fl4_dst
, sizeof(daddr
->a4
));
1161 ipv6_addr_copy((struct in6_addr
*)&saddr
->a6
, &fl
->fl6_src
);
1162 ipv6_addr_copy((struct in6_addr
*)&daddr
->a6
, &fl
->fl6_dst
);
1167 static __inline__
int
1168 __xfrm4_state_addr_check(struct xfrm_state
*x
,
1169 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
1171 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1172 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1177 static __inline__
int
1178 __xfrm6_state_addr_check(struct xfrm_state
*x
,
1179 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
1181 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1182 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
1183 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1184 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1189 static __inline__
int
1190 xfrm_state_addr_check(struct xfrm_state
*x
,
1191 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1192 unsigned short family
)
1196 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1198 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1203 static __inline__
int
1204 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
1205 unsigned short family
)
1209 return __xfrm4_state_addr_check(x
,
1210 (xfrm_address_t
*)&fl
->fl4_dst
,
1211 (xfrm_address_t
*)&fl
->fl4_src
);
1213 return __xfrm6_state_addr_check(x
,
1214 (xfrm_address_t
*)&fl
->fl6_dst
,
1215 (xfrm_address_t
*)&fl
->fl6_src
);
1220 static inline int xfrm_state_kern(struct xfrm_state
*x
)
1222 return atomic_read(&x
->tunnel_users
);
1225 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1227 return (!userproto
|| proto
== userproto
||
1228 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1229 proto
== IPPROTO_ESP
||
1230 proto
== IPPROTO_COMP
)));
1234 * xfrm algorithm information
1236 struct xfrm_algo_aead_info
{
1240 struct xfrm_algo_auth_info
{
1245 struct xfrm_algo_encr_info
{
1250 struct xfrm_algo_comp_info
{
1254 struct xfrm_algo_desc
{
1259 struct xfrm_algo_aead_info aead
;
1260 struct xfrm_algo_auth_info auth
;
1261 struct xfrm_algo_encr_info encr
;
1262 struct xfrm_algo_comp_info comp
;
1264 struct sadb_alg desc
;
1267 /* XFRM tunnel handlers. */
1268 struct xfrm_tunnel
{
1269 int (*handler
)(struct sk_buff
*skb
);
1270 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
1272 struct xfrm_tunnel
*next
;
1276 struct xfrm6_tunnel
{
1277 int (*handler
)(struct sk_buff
*skb
);
1278 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1279 int type
, int code
, int offset
, __be32 info
);
1280 struct xfrm6_tunnel
*next
;
1284 extern void xfrm_init(void);
1285 extern void xfrm4_init(void);
1286 extern int xfrm_state_init(struct net
*net
);
1287 extern void xfrm_state_fini(struct net
*net
);
1288 extern void xfrm4_state_init(void);
1290 extern int xfrm6_init(void);
1291 extern void xfrm6_fini(void);
1292 extern int xfrm6_state_init(void);
1293 extern void xfrm6_state_fini(void);
1295 static inline int xfrm6_init(void)
1299 static inline void xfrm6_fini(void)
1305 #ifdef CONFIG_XFRM_STATISTICS
1306 extern int xfrm_proc_init(void);
1309 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1310 extern int xfrm_state_walk(struct xfrm_state_walk
*walk
,
1311 int (*func
)(struct xfrm_state
*, int, void*), void *);
1312 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1313 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1314 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1315 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
1316 struct xfrm_policy
*pol
, int *err
,
1317 unsigned short family
);
1318 extern struct xfrm_state
* xfrm_stateonly_find(xfrm_address_t
*daddr
,
1319 xfrm_address_t
*saddr
,
1320 unsigned short family
,
1321 u8 mode
, u8 proto
, u32 reqid
);
1322 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1323 extern void xfrm_state_insert(struct xfrm_state
*x
);
1324 extern int xfrm_state_add(struct xfrm_state
*x
);
1325 extern int xfrm_state_update(struct xfrm_state
*x
);
1326 extern struct xfrm_state
*xfrm_state_lookup(xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
1327 extern struct xfrm_state
*xfrm_state_lookup_byaddr(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
1328 #ifdef CONFIG_XFRM_SUB_POLICY
1329 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1330 int n
, unsigned short family
);
1331 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1332 int n
, unsigned short family
);
1334 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1335 int n
, unsigned short family
)
1340 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1341 int n
, unsigned short family
)
1347 struct xfrmk_sadinfo
{
1348 u32 sadhcnt
; /* current hash bkts */
1349 u32 sadhmcnt
; /* max allowed hash bkts */
1350 u32 sadcnt
; /* current running count */
1353 struct xfrmk_spdinfo
{
1364 extern struct xfrm_state
*xfrm_find_acq_byseq(u32 seq
);
1365 extern int xfrm_state_delete(struct xfrm_state
*x
);
1366 extern int xfrm_state_flush(u8 proto
, struct xfrm_audit
*audit_info
);
1367 extern void xfrm_sad_getinfo(struct xfrmk_sadinfo
*si
);
1368 extern void xfrm_spd_getinfo(struct xfrmk_spdinfo
*si
);
1369 extern int xfrm_replay_check(struct xfrm_state
*x
,
1370 struct sk_buff
*skb
, __be32 seq
);
1371 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
1372 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
1373 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1374 extern int xfrm_init_state(struct xfrm_state
*x
);
1375 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1376 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1378 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1379 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1380 extern int xfrm_output(struct sk_buff
*skb
);
1381 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1382 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1383 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1384 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1386 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1387 extern int xfrm4_rcv(struct sk_buff
*skb
);
1389 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1391 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1394 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1395 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1396 extern int xfrm4_output(struct sk_buff
*skb
);
1397 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1398 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1399 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1400 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1401 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1402 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1403 extern int xfrm6_rcv(struct sk_buff
*skb
);
1404 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1405 xfrm_address_t
*saddr
, u8 proto
);
1406 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1407 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1408 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
1409 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
1410 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
1411 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1412 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1413 extern int xfrm6_output(struct sk_buff
*skb
);
1414 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1418 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1419 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1421 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1423 return -ENOPROTOOPT
;
1426 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1428 /* should not happen */
1434 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1436 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1437 extern int xfrm_policy_walk(struct xfrm_policy_walk
*walk
,
1438 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1439 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1440 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1441 struct xfrm_policy
*xfrm_policy_bysel_ctx(u8 type
, int dir
,
1442 struct xfrm_selector
*sel
,
1443 struct xfrm_sec_ctx
*ctx
, int delete,
1445 struct xfrm_policy
*xfrm_policy_byid(u8
, int dir
, u32 id
, int delete, int *err
);
1446 int xfrm_policy_flush(u8 type
, struct xfrm_audit
*audit_info
);
1447 u32
xfrm_get_acqseq(void);
1448 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1449 struct xfrm_state
* xfrm_find_acq(u8 mode
, u32 reqid
, u8 proto
,
1450 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1451 int create
, unsigned short family
);
1452 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1453 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
1454 struct flowi
*fl
, int family
, int strict
);
1456 #ifdef CONFIG_XFRM_MIGRATE
1457 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1458 struct xfrm_migrate
*m
, int num_bundles
,
1459 struct xfrm_kmaddress
*k
);
1460 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1461 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1462 struct xfrm_migrate
*m
);
1463 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1464 struct xfrm_migrate
*m
, int num_bundles
,
1465 struct xfrm_kmaddress
*k
);
1468 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1469 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1470 extern int km_report(u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1472 extern void xfrm_input_init(void);
1473 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1475 extern void xfrm_probe_algs(void);
1476 extern int xfrm_count_auth_supported(void);
1477 extern int xfrm_count_enc_supported(void);
1478 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1479 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1480 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1481 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1482 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1483 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1484 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1485 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1486 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(char *name
, int icv_len
,
1491 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1494 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1495 int offset
, int len
, icv_update_fn_t icv_update
);
1497 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1503 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1505 return ipv6_addr_cmp((struct in6_addr
*)a
,
1506 (struct in6_addr
*)b
);
1510 static inline int xfrm_policy_id2dir(u32 index
)
1515 static inline int xfrm_aevent_is_on(void)
1521 nlsk
= rcu_dereference(xfrm_nl
);
1523 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1528 static inline int xfrm_alg_len(struct xfrm_algo
*alg
)
1530 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1533 #ifdef CONFIG_XFRM_MIGRATE
1534 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1536 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1539 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1542 for (i
= 0; i
< n
; i
++)
1543 xfrm_state_put(*(states
+ i
));
1546 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1549 for (i
= 0; i
< n
; i
++)
1550 xfrm_state_delete(*(states
+ i
));
1555 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1557 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1561 #endif /* _NET_XFRM_H */