4 #include <linux/compiler.h>
5 #include <linux/xfrm.h>
6 #include <linux/spinlock.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
9 #include <linux/socket.h>
10 #include <linux/pfkeyv2.h>
11 #include <linux/ipsec.h>
12 #include <linux/in6.h>
13 #include <linux/mutex.h>
14 #include <linux/audit.h>
15 #include <linux/slab.h>
20 #include <net/route.h>
22 #include <net/ip6_fib.h>
25 #include <linux/interrupt.h>
27 #ifdef CONFIG_XFRM_STATISTICS
31 #define XFRM_PROTO_ESP 50
32 #define XFRM_PROTO_AH 51
33 #define XFRM_PROTO_COMP 108
34 #define XFRM_PROTO_IPIP 4
35 #define XFRM_PROTO_IPV6 41
36 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
39 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
40 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
41 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
43 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
46 #ifdef CONFIG_XFRM_STATISTICS
47 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
48 #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field)
49 #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field)
51 #define XFRM_INC_STATS(net, field) ((void)(net))
52 #define XFRM_INC_STATS_BH(net, field) ((void)(net))
53 #define XFRM_INC_STATS_USER(net, field) ((void)(net))
56 extern struct mutex xfrm_cfg_mutex
;
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
72 Lookup is plain linear search until the first match with selector.
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
86 Bundles are cached at xrfm_policy struct (field ->bundles).
89 Resolution of xrfm_tmpl
90 -----------------------
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
119 struct xfrm_state_walk
{
120 struct list_head all
;
129 /* 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
;
146 struct xfrm_mark mark
;
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_auth
*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 tasklet_hrtimer mtimer
;
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
)(struct net
*net
);
269 struct dst_entry
*(*dst_lookup
)(struct net
*net
, int tos
,
270 xfrm_address_t
*saddr
,
271 xfrm_address_t
*daddr
);
272 int (*get_saddr
)(struct net
*net
, xfrm_address_t
*saddr
, xfrm_address_t
*daddr
);
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
,
285 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
286 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
287 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, struct km_event
*c
);
288 extern void km_state_notify(struct xfrm_state
*x
, struct km_event
*c
);
291 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
292 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
293 extern int __xfrm_state_delete(struct xfrm_state
*x
);
295 struct xfrm_state_afinfo
{
299 struct module
*owner
;
300 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
301 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
302 int (*init_flags
)(struct xfrm_state
*x
);
303 void (*init_tempsel
)(struct xfrm_selector
*sel
, struct flowi
*fl
);
304 void (*init_temprop
)(struct xfrm_state
*x
, struct xfrm_tmpl
*tmpl
,
305 xfrm_address_t
*daddr
, xfrm_address_t
*saddr
);
306 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
307 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
308 int (*output
)(struct sk_buff
*skb
);
309 int (*extract_input
)(struct xfrm_state
*x
,
310 struct sk_buff
*skb
);
311 int (*extract_output
)(struct xfrm_state
*x
,
312 struct sk_buff
*skb
);
313 int (*transport_finish
)(struct sk_buff
*skb
,
317 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
318 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
320 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
;
429 /* id in template is interpreted as:
430 * daddr - destination of tunnel, may be zero for transport mode.
431 * spi - zero to acquire spi. Not zero if spi is static, then
432 * daddr must be fixed too.
433 * proto - AH/ESP/IPCOMP
437 /* Source address of tunnel. Ignored, if it is not a tunnel. */
438 xfrm_address_t saddr
;
440 unsigned short encap_family
;
444 /* Mode: transport, tunnel etc. */
447 /* Sharing mode: unique, this session only, this user only etc. */
450 /* May skip this transfomration if no SA is found */
453 /* Skip aalgos/ealgos/calgos checks. */
456 /* Bit mask of algos allowed for acquisition */
462 #define XFRM_MAX_DEPTH 6
464 struct xfrm_policy_walk_entry
{
465 struct list_head all
;
469 struct xfrm_policy_walk
{
470 struct xfrm_policy_walk_entry walk
;
479 struct hlist_node bydst
;
480 struct hlist_node byidx
;
482 /* This lock only affects elements except for entry. */
485 struct timer_list timer
;
487 struct flow_cache_object flo
;
491 struct xfrm_mark mark
;
492 struct xfrm_selector selector
;
493 struct xfrm_lifetime_cfg lft
;
494 struct xfrm_lifetime_cur curlft
;
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
547 struct list_head list
;
549 int (*notify
)(struct xfrm_state
*x
, struct km_event
*c
);
550 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
551 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
552 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
553 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, struct km_event
*c
);
554 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
555 int (*migrate
)(struct xfrm_selector
*sel
, u8 dir
, u8 type
, struct xfrm_migrate
*m
, int num_bundles
, struct xfrm_kmaddress
*k
);
558 extern int xfrm_register_km(struct xfrm_mgr
*km
);
559 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
562 * This structure is used for the duration where packets are being
563 * transformed by IPsec. As soon as the packet leaves IPsec the
564 * area beyond the generic IP part may be overwritten.
568 struct inet_skb_parm h4
;
569 struct inet6_skb_parm h6
;
572 /* Sequence number for replay protection. */
579 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
582 * This structure is used by the afinfo prepare_input/prepare_output functions
583 * to transmit header information to the mode input/output functions.
585 struct xfrm_mode_skb_cb
{
587 struct inet_skb_parm h4
;
588 struct inet6_skb_parm h6
;
591 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
595 /* IP header length (excluding options or extension headers). */
598 /* TOS for IPv4, class for IPv6. */
601 /* TTL for IPv4, hop limitfor IPv6. */
604 /* Protocol for IPv4, NH for IPv6. */
607 /* Option length for IPv4, zero for IPv6. */
610 /* Used by IPv6 only, zero for IPv4. */
614 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
617 * This structure is used by the input processing to locate the SPI and
618 * related information.
620 struct xfrm_spi_skb_cb
{
622 struct inet_skb_parm h4
;
623 struct inet6_skb_parm h6
;
626 unsigned int daddroff
;
630 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
632 /* Audit Information */
639 #ifdef CONFIG_AUDITSYSCALL
640 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
642 struct audit_buffer
*audit_buf
= NULL
;
644 if (audit_enabled
== 0)
646 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
647 AUDIT_MAC_IPSEC_EVENT
);
648 if (audit_buf
== NULL
)
650 audit_log_format(audit_buf
, "op=%s", op
);
654 static inline void xfrm_audit_helper_usrinfo(uid_t auid
, u32 ses
, u32 secid
,
655 struct audit_buffer
*audit_buf
)
660 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
662 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
663 audit_log_format(audit_buf
, " subj=%s", secctx
);
664 security_release_secctx(secctx
, secctx_len
);
666 audit_log_task_context(audit_buf
);
669 extern void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
670 u32 auid
, u32 ses
, u32 secid
);
671 extern void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
672 u32 auid
, u32 ses
, u32 secid
);
673 extern void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
674 u32 auid
, u32 ses
, u32 secid
);
675 extern void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
676 u32 auid
, u32 ses
, u32 secid
);
677 extern void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
678 struct sk_buff
*skb
);
679 extern void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
680 extern void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
681 __be32 net_spi
, __be32 net_seq
);
682 extern void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
683 struct sk_buff
*skb
, u8 proto
);
686 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
687 u32 auid
, u32 ses
, u32 secid
)
691 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
692 u32 auid
, u32 ses
, u32 secid
)
696 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
697 u32 auid
, u32 ses
, u32 secid
)
701 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
702 u32 auid
, u32 ses
, u32 secid
)
706 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
711 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
716 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
717 __be32 net_spi
, __be32 net_seq
)
721 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
722 struct sk_buff
*skb
, u8 proto
)
725 #endif /* CONFIG_AUDITSYSCALL */
727 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
729 if (likely(policy
!= NULL
))
730 atomic_inc(&policy
->refcnt
);
733 extern void xfrm_policy_destroy(struct xfrm_policy
*policy
);
735 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
737 if (atomic_dec_and_test(&policy
->refcnt
))
738 xfrm_policy_destroy(policy
);
741 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
744 for (i
= npols
- 1; i
>= 0; --i
)
745 xfrm_pol_put(pols
[i
]);
748 extern void __xfrm_state_destroy(struct xfrm_state
*);
750 static inline void __xfrm_state_put(struct xfrm_state
*x
)
752 atomic_dec(&x
->refcnt
);
755 static inline void xfrm_state_put(struct xfrm_state
*x
)
757 if (atomic_dec_and_test(&x
->refcnt
))
758 __xfrm_state_destroy(x
);
761 static inline void xfrm_state_hold(struct xfrm_state
*x
)
763 atomic_inc(&x
->refcnt
);
766 static __inline__
int addr_match(void *token1
, void *token2
, int prefixlen
)
773 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
774 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
777 if (memcmp(a1
, a2
, pdw
<< 2))
783 mask
= htonl((0xffffffff) << (32 - pbi
));
785 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
793 __be16
xfrm_flowi_sport(const struct flowi
*fl
)
799 case IPPROTO_UDPLITE
:
801 port
= fl
->fl_ip_sport
;
805 port
= htons(fl
->fl_icmp_type
);
808 port
= htons(fl
->fl_mh_type
);
811 port
= htons(ntohl(fl
->fl_gre_key
) >> 16);
820 __be16
xfrm_flowi_dport(const struct flowi
*fl
)
826 case IPPROTO_UDPLITE
:
828 port
= fl
->fl_ip_dport
;
832 port
= htons(fl
->fl_icmp_code
);
835 port
= htons(ntohl(fl
->fl_gre_key
) & 0xffff);
843 extern int xfrm_selector_match(struct xfrm_selector
*sel
, struct flowi
*fl
,
844 unsigned short family
);
846 #ifdef CONFIG_SECURITY_NETWORK_XFRM
847 /* If neither has a context --> match
848 * Otherwise, both must have a context and the sids, doi, alg must match
850 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
852 return ((!s1
&& !s2
) ||
854 (s1
->ctx_sid
== s2
->ctx_sid
) &&
855 (s1
->ctx_doi
== s2
->ctx_doi
) &&
856 (s1
->ctx_alg
== s2
->ctx_alg
)));
859 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
865 /* A struct encoding bundle of transformations to apply to some set of flow.
867 * dst->child points to the next element of bundle.
868 * dst->xfrm points to an instanse of transformer.
870 * Due to unfortunate limitations of current routing cache, which we
871 * have no time to fix, it mirrors struct rtable and bound to the same
872 * routing key, including saddr,daddr. However, we can have many of
873 * bundles differing by session id. All the bundles grow from a parent
878 struct dst_entry dst
;
882 struct dst_entry
*route
;
883 struct flow_cache_object flo
;
884 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
885 int num_pols
, num_xfrms
;
886 #ifdef CONFIG_XFRM_SUB_POLICY
887 struct flowi
*origin
;
888 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 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
902 dst_release(xdst
->route
);
903 if (likely(xdst
->u
.dst
.xfrm
))
904 xfrm_state_put(xdst
->u
.dst
.xfrm
);
905 #ifdef CONFIG_XFRM_SUB_POLICY
908 kfree(xdst
->partner
);
909 xdst
->partner
= NULL
;
914 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(skb
)->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(skb
)->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(const 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(const 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(const 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
, const 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 __rcu
*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 u8 type
, u8 code
, int offset
, __be32 info
);
1283 struct xfrm6_tunnel __rcu
*next
;
1287 extern void xfrm_init(void);
1288 extern void xfrm4_init(int rt_hash_size
);
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 int xfrm_sysctl_init(struct net
*net
);
1314 #ifdef CONFIG_SYSCTL
1315 extern void xfrm_sysctl_fini(struct net
*net
);
1317 static inline void xfrm_sysctl_fini(struct net
*net
)
1322 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1323 extern int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1324 int (*func
)(struct xfrm_state
*, int, void*), void *);
1325 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1326 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1327 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
, xfrm_address_t
*saddr
,
1328 struct flowi
*fl
, struct xfrm_tmpl
*tmpl
,
1329 struct xfrm_policy
*pol
, int *err
,
1330 unsigned short family
);
1331 extern struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1332 xfrm_address_t
*daddr
,
1333 xfrm_address_t
*saddr
,
1334 unsigned short family
,
1335 u8 mode
, u8 proto
, u32 reqid
);
1336 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1337 extern void xfrm_state_insert(struct xfrm_state
*x
);
1338 extern int xfrm_state_add(struct xfrm_state
*x
);
1339 extern int xfrm_state_update(struct xfrm_state
*x
);
1340 extern struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1341 xfrm_address_t
*daddr
, __be32 spi
,
1342 u8 proto
, unsigned short family
);
1343 extern struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1344 xfrm_address_t
*daddr
,
1345 xfrm_address_t
*saddr
,
1347 unsigned short family
);
1348 #ifdef CONFIG_XFRM_SUB_POLICY
1349 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1350 int n
, unsigned short family
);
1351 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1352 int n
, unsigned short family
);
1354 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1355 int n
, unsigned short family
)
1360 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1361 int n
, unsigned short family
)
1367 struct xfrmk_sadinfo
{
1368 u32 sadhcnt
; /* current hash bkts */
1369 u32 sadhmcnt
; /* max allowed hash bkts */
1370 u32 sadcnt
; /* current running count */
1373 struct xfrmk_spdinfo
{
1384 extern struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
,
1386 extern int xfrm_state_delete(struct xfrm_state
*x
);
1387 extern int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1388 extern void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1389 extern void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1390 extern int xfrm_replay_check(struct xfrm_state
*x
,
1391 struct sk_buff
*skb
, __be32 seq
);
1392 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
1393 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
1394 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1395 extern int xfrm_init_state(struct xfrm_state
*x
);
1396 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1397 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1399 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1400 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1401 extern int xfrm_output(struct sk_buff
*skb
);
1402 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1403 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1404 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1405 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1407 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1408 extern int xfrm4_rcv(struct sk_buff
*skb
);
1410 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1412 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1415 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1416 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1417 extern int xfrm4_output(struct sk_buff
*skb
);
1418 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1419 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1420 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1421 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1422 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1423 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1424 extern int xfrm6_rcv(struct sk_buff
*skb
);
1425 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1426 xfrm_address_t
*saddr
, u8 proto
);
1427 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1428 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1429 extern __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1430 extern __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, xfrm_address_t
*saddr
);
1431 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1432 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1433 extern int xfrm6_output(struct sk_buff
*skb
);
1434 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1438 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1439 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1441 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1443 return -ENOPROTOOPT
;
1446 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1448 /* should not happen */
1454 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1456 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1457 extern int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1458 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1459 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1460 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1461 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1463 struct xfrm_selector
*sel
,
1464 struct xfrm_sec_ctx
*ctx
, int delete,
1466 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
, u32 id
, int delete, int *err
);
1467 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1468 u32
xfrm_get_acqseq(void);
1469 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1470 struct xfrm_state
*xfrm_find_acq(struct net
*net
, struct xfrm_mark
*mark
,
1471 u8 mode
, u32 reqid
, u8 proto
,
1472 xfrm_address_t
*daddr
,
1473 xfrm_address_t
*saddr
, int create
,
1474 unsigned short family
);
1475 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1477 #ifdef CONFIG_XFRM_MIGRATE
1478 extern int km_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1479 struct xfrm_migrate
*m
, int num_bundles
,
1480 struct xfrm_kmaddress
*k
);
1481 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1482 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1483 struct xfrm_migrate
*m
);
1484 extern int xfrm_migrate(struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1485 struct xfrm_migrate
*m
, int num_bundles
,
1486 struct xfrm_kmaddress
*k
);
1489 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1490 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1491 extern int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1493 extern void xfrm_input_init(void);
1494 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1496 extern void xfrm_probe_algs(void);
1497 extern int xfrm_count_auth_supported(void);
1498 extern int xfrm_count_enc_supported(void);
1499 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1500 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1501 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1502 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1503 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1504 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1505 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1506 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1507 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(char *name
, int icv_len
,
1512 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1515 static inline int xfrm_addr_cmp(xfrm_address_t
*a
, xfrm_address_t
*b
,
1521 return (__force u32
)a
->a4
- (__force u32
)b
->a4
;
1523 return ipv6_addr_cmp((struct in6_addr
*)a
,
1524 (struct in6_addr
*)b
);
1528 static inline int xfrm_policy_id2dir(u32 index
)
1534 static inline int xfrm_aevent_is_on(struct net
*net
)
1540 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1542 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1548 static inline int xfrm_alg_len(struct xfrm_algo
*alg
)
1550 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1553 static inline int xfrm_alg_auth_len(struct xfrm_algo_auth
*alg
)
1555 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1558 #ifdef CONFIG_XFRM_MIGRATE
1559 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1561 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1564 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1566 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1569 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1572 for (i
= 0; i
< n
; i
++)
1573 xfrm_state_put(*(states
+ i
));
1576 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1579 for (i
= 0; i
< n
; i
++)
1580 xfrm_state_delete(*(states
+ i
));
1585 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1587 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1591 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1593 if (attrs
[XFRMA_MARK
])
1594 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1601 static inline int xfrm_mark_put(struct sk_buff
*skb
, struct xfrm_mark
*m
)
1604 NLA_PUT(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1611 #endif /* _NET_XFRM_H */