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 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
42 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
43 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
45 #define XFRM_INC_STATS(net, field) ((void)(net))
46 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
47 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
50 extern u32 sysctl_xfrm_aevent_etime
;
51 extern u32 sysctl_xfrm_aevent_rseqth
;
52 extern int sysctl_xfrm_larval_drop
;
53 extern u32 sysctl_xfrm_acq_expires
;
55 extern struct mutex xfrm_cfg_mutex
;
57 /* Organization of SPD aka "XFRM rules"
58 ------------------------------------
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71 Lookup is plain linear search until the first match with selector.
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
85 Bundles are cached at xrfm_policy struct (field ->bundles).
88 Resolution of xrfm_tmpl
89 -----------------------
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
118 struct xfrm_state_walk
{
119 struct list_head all
;
128 /* Full description of state of transformer. */
135 struct hlist_node gclist
;
136 struct hlist_node bydst
;
138 struct hlist_node bysrc
;
139 struct hlist_node byspi
;
145 struct xfrm_selector sel
;
149 /* Key manager bits */
150 struct xfrm_state_walk km
;
152 /* Parameters of this state. */
157 u8 aalgo
, ealgo
, calgo
;
160 xfrm_address_t saddr
;
165 struct xfrm_lifetime_cfg lft
;
167 /* Data for transformer */
168 struct xfrm_algo
*aalg
;
169 struct xfrm_algo
*ealg
;
170 struct xfrm_algo
*calg
;
171 struct xfrm_algo_aead
*aead
;
173 /* Data for encapsulator */
174 struct xfrm_encap_tmpl
*encap
;
176 /* Data for care-of address */
177 xfrm_address_t
*coaddr
;
179 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
180 struct xfrm_state
*tunnel
;
182 /* If a tunnel, number of users + 1 */
183 atomic_t tunnel_users
;
185 /* State for replay detection */
186 struct xfrm_replay_state replay
;
188 /* Replay detection state at the time we sent the last notification */
189 struct xfrm_replay_state preplay
;
191 /* internal flag that only holds state for delayed aevent at the
196 /* Replay detection notification settings */
200 /* Replay detection notification timer */
201 struct timer_list rtimer
;
204 struct xfrm_stats stats
;
206 struct xfrm_lifetime_cur curlft
;
207 struct timer_list timer
;
210 unsigned long lastused
;
212 /* Reference to data common to all the instances of this
214 const struct xfrm_type
*type
;
215 struct xfrm_mode
*inner_mode
;
216 struct xfrm_mode
*inner_mode_iaf
;
217 struct xfrm_mode
*outer_mode
;
219 /* Security context */
220 struct xfrm_sec_ctx
*security
;
222 /* Private data of this transformer, format is opaque,
223 * interpreted by xfrm_type methods. */
227 static inline struct net
*xs_net(struct xfrm_state
*x
)
229 return read_pnet(&x
->xs_net
);
232 /* xflags - make enum if more show up */
233 #define XFRM_TIME_DEFER 1
244 /* callback structure passed from either netlink or pfkey */
264 struct xfrm_policy_afinfo
{
265 unsigned short family
;
266 struct dst_ops
*dst_ops
;
267 void (*garbage_collect
)(struct net
*net
);
268 struct dst_entry
*(*dst_lookup
)(struct net
*net
, int tos
,
269 xfrm_address_t
*saddr
,
270 xfrm_address_t
*daddr
);
271 int (*get_saddr
)(struct net
*net
, 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
)(struct net
*net
, 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 struct net
*net
= dev_net(skb
->dev
);
996 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
998 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
999 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1001 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1002 (skb
->dst
->flags
& DST_NOPOLICY
) ||
1003 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1006 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1008 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1011 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1013 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1016 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1018 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1021 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1022 struct sk_buff
*skb
)
1024 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1027 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1028 struct sk_buff
*skb
)
1030 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1033 extern int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1034 unsigned int family
, int reverse
);
1036 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1037 unsigned int family
)
1039 return __xfrm_decode_session(skb
, fl
, family
, 0);
1042 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1044 unsigned int family
)
1046 return __xfrm_decode_session(skb
, fl
, family
, 1);
1049 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1051 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1053 struct net
*net
= dev_net(skb
->dev
);
1055 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1056 (skb
->dst
->flags
& DST_NOXFRM
) ||
1057 __xfrm_route_forward(skb
, family
);
1060 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1062 return xfrm_route_forward(skb
, AF_INET
);
1065 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1067 return xfrm_route_forward(skb
, AF_INET6
);
1070 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
1072 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1074 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1075 return __xfrm_sk_clone_policy(sk
);
1079 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1081 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1083 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1084 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1085 sk
->sk_policy
[0] = NULL
;
1087 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1088 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1089 sk
->sk_policy
[1] = NULL
;
1095 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1096 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1097 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1098 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1099 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1103 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1107 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1111 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1113 unsigned int family
)
1117 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1118 struct sk_buff
*skb
)
1122 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1123 struct sk_buff
*skb
)
1130 xfrm_address_t
*xfrm_flowi_daddr(struct flowi
*fl
, unsigned short family
)
1134 return (xfrm_address_t
*)&fl
->fl4_dst
;
1136 return (xfrm_address_t
*)&fl
->fl6_dst
;
1142 xfrm_address_t
*xfrm_flowi_saddr(struct flowi
*fl
, unsigned short family
)
1146 return (xfrm_address_t
*)&fl
->fl4_src
;
1148 return (xfrm_address_t
*)&fl
->fl6_src
;
1154 void xfrm_flowi_addr_get(struct flowi
*fl
,
1155 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1156 unsigned short family
)
1160 memcpy(&saddr
->a4
, &fl
->fl4_src
, sizeof(saddr
->a4
));
1161 memcpy(&daddr
->a4
, &fl
->fl4_dst
, sizeof(daddr
->a4
));
1164 ipv6_addr_copy((struct in6_addr
*)&saddr
->a6
, &fl
->fl6_src
);
1165 ipv6_addr_copy((struct in6_addr
*)&daddr
->a6
, &fl
->fl6_dst
);
1170 static __inline__
int
1171 __xfrm4_state_addr_check(struct xfrm_state
*x
,
1172 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
1174 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1175 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1180 static __inline__
int
1181 __xfrm6_state_addr_check(struct xfrm_state
*x
,
1182 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
)
1184 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1185 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
1186 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1187 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1192 static __inline__
int
1193 xfrm_state_addr_check(struct xfrm_state
*x
,
1194 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1195 unsigned short family
)
1199 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1201 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1206 static __inline__
int
1207 xfrm_state_addr_flow_check(struct xfrm_state
*x
, struct flowi
*fl
,
1208 unsigned short family
)
1212 return __xfrm4_state_addr_check(x
,
1213 (xfrm_address_t
*)&fl
->fl4_dst
,
1214 (xfrm_address_t
*)&fl
->fl4_src
);
1216 return __xfrm6_state_addr_check(x
,
1217 (xfrm_address_t
*)&fl
->fl6_dst
,
1218 (xfrm_address_t
*)&fl
->fl6_src
);
1223 static inline int xfrm_state_kern(struct xfrm_state
*x
)
1225 return atomic_read(&x
->tunnel_users
);
1228 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1230 return (!userproto
|| proto
== userproto
||
1231 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1232 proto
== IPPROTO_ESP
||
1233 proto
== IPPROTO_COMP
)));
1237 * xfrm algorithm information
1239 struct xfrm_algo_aead_info
{
1243 struct xfrm_algo_auth_info
{
1248 struct xfrm_algo_encr_info
{
1253 struct xfrm_algo_comp_info
{
1257 struct xfrm_algo_desc
{
1262 struct xfrm_algo_aead_info aead
;
1263 struct xfrm_algo_auth_info auth
;
1264 struct xfrm_algo_encr_info encr
;
1265 struct xfrm_algo_comp_info comp
;
1267 struct sadb_alg desc
;
1270 /* XFRM tunnel handlers. */
1271 struct xfrm_tunnel
{
1272 int (*handler
)(struct sk_buff
*skb
);
1273 int (*err_handler
)(struct sk_buff
*skb
, __u32 info
);
1275 struct xfrm_tunnel
*next
;
1279 struct xfrm6_tunnel
{
1280 int (*handler
)(struct sk_buff
*skb
);
1281 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1282 int type
, int code
, int offset
, __be32 info
);
1283 struct xfrm6_tunnel
*next
;
1287 extern void xfrm_init(void);
1288 extern void xfrm4_init(void);
1289 extern int xfrm_state_init(struct net
*net
);
1290 extern void xfrm_state_fini(struct net
*net
);
1291 extern void xfrm4_state_init(void);
1293 extern int xfrm6_init(void);
1294 extern void xfrm6_fini(void);
1295 extern int xfrm6_state_init(void);
1296 extern void xfrm6_state_fini(void);
1298 static inline int xfrm6_init(void)
1302 static inline void xfrm6_fini(void)
1308 #ifdef CONFIG_XFRM_STATISTICS
1309 extern int xfrm_proc_init(struct net
*net
);
1310 extern void xfrm_proc_fini(struct net
*net
);
1313 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1314 extern int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1315 int (*func
)(struct xfrm_state
*, int, void*), void *);
1316 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1317 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1318 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1319 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
1320 struct xfrm_policy
*pol
, int *err
,
1321 unsigned short family
);
1322 extern struct xfrm_state
* xfrm_stateonly_find(struct net
*net
,
1323 xfrm_address_t
*daddr
,
1324 xfrm_address_t
*saddr
,
1325 unsigned short family
,
1326 u8 mode
, u8 proto
, u32 reqid
);
1327 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1328 extern void xfrm_state_insert(struct xfrm_state
*x
);
1329 extern int xfrm_state_add(struct xfrm_state
*x
);
1330 extern int xfrm_state_update(struct xfrm_state
*x
);
1331 extern struct xfrm_state
*xfrm_state_lookup(struct net
*net
, xfrm_address_t
*daddr
, __be32 spi
, u8 proto
, unsigned short family
);
1332 extern struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, xfrm_address_t
*daddr
, xfrm_address_t
*saddr
, u8 proto
, unsigned short family
);
1333 #ifdef CONFIG_XFRM_SUB_POLICY
1334 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1335 int n
, unsigned short family
);
1336 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1337 int n
, unsigned short family
);
1339 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1340 int n
, unsigned short family
)
1345 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1346 int n
, unsigned short family
)
1352 struct xfrmk_sadinfo
{
1353 u32 sadhcnt
; /* current hash bkts */
1354 u32 sadhmcnt
; /* max allowed hash bkts */
1355 u32 sadcnt
; /* current running count */
1358 struct xfrmk_spdinfo
{
1369 extern struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 seq
);
1370 extern int xfrm_state_delete(struct xfrm_state
*x
);
1371 extern int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1372 extern void xfrm_sad_getinfo(struct xfrmk_sadinfo
*si
);
1373 extern void xfrm_spd_getinfo(struct xfrmk_spdinfo
*si
);
1374 extern int xfrm_replay_check(struct xfrm_state
*x
,
1375 struct sk_buff
*skb
, __be32 seq
);
1376 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
1377 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
1378 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1379 extern int xfrm_init_state(struct xfrm_state
*x
);
1380 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1381 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1383 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1384 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1385 extern int xfrm_output(struct sk_buff
*skb
);
1386 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1387 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1388 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1389 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1391 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1392 extern int xfrm4_rcv(struct sk_buff
*skb
);
1394 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1396 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1399 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1400 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1401 extern int xfrm4_output(struct sk_buff
*skb
);
1402 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1403 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1404 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1405 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1406 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1407 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1408 extern int xfrm6_rcv(struct sk_buff
*skb
);
1409 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1410 xfrm_address_t
*saddr
, u8 proto
);
1411 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1412 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1413 extern __be32
xfrm6_tunnel_alloc_spi(xfrm_address_t
*saddr
);
1414 extern void xfrm6_tunnel_free_spi(xfrm_address_t
*saddr
);
1415 extern __be32
xfrm6_tunnel_spi_lookup(xfrm_address_t
*saddr
);
1416 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1417 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1418 extern int xfrm6_output(struct sk_buff
*skb
);
1419 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1423 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1424 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1426 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1428 return -ENOPROTOOPT
;
1431 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1433 /* should not happen */
1439 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1441 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1442 extern int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1443 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1444 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1445 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1446 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u8 type
, int dir
,
1447 struct xfrm_selector
*sel
,
1448 struct xfrm_sec_ctx
*ctx
, int delete,
1450 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u8
, int dir
, u32 id
, int delete, int *err
);
1451 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1452 u32
xfrm_get_acqseq(void);
1453 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1454 struct xfrm_state
* xfrm_find_acq(struct net
*net
, u8 mode
, u32 reqid
, u8 proto
,
1455 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1456 int create
, unsigned short family
);
1457 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1458 extern int xfrm_bundle_ok(struct xfrm_policy
*pol
, struct xfrm_dst
*xdst
,
1459 struct flowi
*fl
, int family
, int strict
);
1461 #ifdef CONFIG_XFRM_MIGRATE
1462 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1463 struct xfrm_migrate
*m
, int num_bundles
,
1464 struct xfrm_kmaddress
*k
);
1465 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1466 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1467 struct xfrm_migrate
*m
);
1468 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1469 struct xfrm_migrate
*m
, int num_bundles
,
1470 struct xfrm_kmaddress
*k
);
1473 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1474 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1475 extern int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1477 extern void xfrm_input_init(void);
1478 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1480 extern void xfrm_probe_algs(void);
1481 extern int xfrm_count_auth_supported(void);
1482 extern int xfrm_count_enc_supported(void);
1483 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1484 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1485 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1486 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1487 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1488 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1489 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1490 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1491 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(char *name
, int icv_len
,
1496 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1499 extern int skb_icv_walk(const struct sk_buff
*skb
, struct hash_desc
*tfm
,
1500 int offset
, int len
, icv_update_fn_t icv_update
);
1502 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1508 return (__force __u32
)a
->a4
- (__force __u32
)b
->a4
;
1510 return ipv6_addr_cmp((struct in6_addr
*)a
,
1511 (struct in6_addr
*)b
);
1515 static inline int xfrm_policy_id2dir(u32 index
)
1521 static inline int xfrm_aevent_is_on(struct net
*net
)
1527 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1529 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1535 static inline int xfrm_alg_len(struct xfrm_algo
*alg
)
1537 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1540 #ifdef CONFIG_XFRM_MIGRATE
1541 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1543 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1546 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1549 for (i
= 0; i
< n
; i
++)
1550 xfrm_state_put(*(states
+ i
));
1553 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1556 for (i
= 0; i
< n
; i
++)
1557 xfrm_state_delete(*(states
+ i
));
1562 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1564 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1568 #endif /* _NET_XFRM_H */