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))
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
;
124 struct xfrm_filter
*filter
;
127 /* Full description of state of transformer. */
133 struct hlist_node gclist
;
134 struct hlist_node bydst
;
136 struct hlist_node bysrc
;
137 struct hlist_node byspi
;
143 struct xfrm_selector sel
;
144 struct xfrm_mark mark
;
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
;
166 struct xfrm_lifetime_cfg lft
;
168 /* Data for transformer */
169 struct xfrm_algo_auth
*aalg
;
170 struct xfrm_algo
*ealg
;
171 struct xfrm_algo
*calg
;
172 struct xfrm_algo_aead
*aead
;
174 /* Data for encapsulator */
175 struct xfrm_encap_tmpl
*encap
;
177 /* Data for care-of address */
178 xfrm_address_t
*coaddr
;
180 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
181 struct xfrm_state
*tunnel
;
183 /* If a tunnel, number of users + 1 */
184 atomic_t tunnel_users
;
186 /* State for replay detection */
187 struct xfrm_replay_state replay
;
188 struct xfrm_replay_state_esn
*replay_esn
;
190 /* Replay detection state at the time we sent the last notification */
191 struct xfrm_replay_state preplay
;
192 struct xfrm_replay_state_esn
*preplay_esn
;
194 /* The functions for replay detection. */
195 struct xfrm_replay
*repl
;
197 /* internal flag that only holds state for delayed aevent at the
202 /* Replay detection notification settings */
206 /* Replay detection notification timer */
207 struct timer_list rtimer
;
210 struct xfrm_stats stats
;
212 struct xfrm_lifetime_cur curlft
;
213 struct tasklet_hrtimer mtimer
;
215 /* used to fix curlft->add_time when changing date */
219 unsigned long lastused
;
221 /* Reference to data common to all the instances of this
223 const struct xfrm_type
*type
;
224 struct xfrm_mode
*inner_mode
;
225 struct xfrm_mode
*inner_mode_iaf
;
226 struct xfrm_mode
*outer_mode
;
228 /* Security context */
229 struct xfrm_sec_ctx
*security
;
231 /* Private data of this transformer, format is opaque,
232 * interpreted by xfrm_type methods. */
236 static inline struct net
*xs_net(struct xfrm_state
*x
)
238 return read_pnet(&x
->xs_net
);
241 /* xflags - make enum if more show up */
242 #define XFRM_TIME_DEFER 1
243 #define XFRM_SOFT_EXPIRE 2
254 /* callback structure passed from either netlink or pfkey */
271 void (*advance
)(struct xfrm_state
*x
, __be32 net_seq
);
272 int (*check
)(struct xfrm_state
*x
,
275 int (*recheck
)(struct xfrm_state
*x
,
278 void (*notify
)(struct xfrm_state
*x
, int event
);
279 int (*overflow
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
285 struct xfrm_policy_afinfo
{
286 unsigned short family
;
287 struct dst_ops
*dst_ops
;
288 void (*garbage_collect
)(struct net
*net
);
289 struct dst_entry
*(*dst_lookup
)(struct net
*net
, int tos
,
290 const xfrm_address_t
*saddr
,
291 const xfrm_address_t
*daddr
);
292 int (*get_saddr
)(struct net
*net
, xfrm_address_t
*saddr
, xfrm_address_t
*daddr
);
293 void (*decode_session
)(struct sk_buff
*skb
,
296 int (*get_tos
)(const struct flowi
*fl
);
297 void (*init_dst
)(struct net
*net
,
298 struct xfrm_dst
*dst
);
299 int (*init_path
)(struct xfrm_dst
*path
,
300 struct dst_entry
*dst
,
302 int (*fill_dst
)(struct xfrm_dst
*xdst
,
303 struct net_device
*dev
,
304 const struct flowi
*fl
);
305 struct dst_entry
*(*blackhole_route
)(struct net
*net
, struct dst_entry
*orig
);
308 int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
309 int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
310 void km_policy_notify(struct xfrm_policy
*xp
, int dir
,
311 const struct km_event
*c
);
312 void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
);
315 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
,
316 struct xfrm_policy
*pol
);
317 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 portid
);
318 int __xfrm_state_delete(struct xfrm_state
*x
);
320 struct xfrm_state_afinfo
{
324 struct module
*owner
;
325 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
326 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
327 int (*init_flags
)(struct xfrm_state
*x
);
328 void (*init_tempsel
)(struct xfrm_selector
*sel
,
329 const struct flowi
*fl
);
330 void (*init_temprop
)(struct xfrm_state
*x
,
331 const struct xfrm_tmpl
*tmpl
,
332 const xfrm_address_t
*daddr
,
333 const xfrm_address_t
*saddr
);
334 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
335 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
336 int (*output
)(struct sk_buff
*skb
);
337 int (*output_finish
)(struct sk_buff
*skb
);
338 int (*extract_input
)(struct xfrm_state
*x
,
339 struct sk_buff
*skb
);
340 int (*extract_output
)(struct xfrm_state
*x
,
341 struct sk_buff
*skb
);
342 int (*transport_finish
)(struct sk_buff
*skb
,
344 void (*local_error
)(struct sk_buff
*skb
, u32 mtu
);
347 int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
348 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
349 struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
);
350 void xfrm_state_put_afinfo(struct xfrm_state_afinfo
*afinfo
);
352 void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
356 struct module
*owner
;
359 #define XFRM_TYPE_NON_FRAGMENT 1
360 #define XFRM_TYPE_REPLAY_PROT 2
361 #define XFRM_TYPE_LOCAL_COADDR 4
362 #define XFRM_TYPE_REMOTE_COADDR 8
364 int (*init_state
)(struct xfrm_state
*x
);
365 void (*destructor
)(struct xfrm_state
*);
366 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
367 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
368 int (*reject
)(struct xfrm_state
*, struct sk_buff
*,
369 const struct flowi
*);
370 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
371 /* Estimate maximal size of result of transformation of a dgram */
372 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
375 int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
376 int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
380 * Remove encapsulation header.
382 * The IP header will be moved over the top of the encapsulation
385 * On entry, the transport header shall point to where the IP header
386 * should be and the network header shall be set to where the IP
387 * header currently is. skb->data shall point to the start of the
390 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
393 * This is the actual input entry point.
395 * For transport mode and equivalent this would be identical to
396 * input2 (which does not need to be set). While tunnel mode
397 * and equivalent would set this to the tunnel encapsulation function
398 * xfrm4_prepare_input that would in turn call input2.
400 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
403 * Add encapsulation header.
405 * On exit, the transport header will be set to the start of the
406 * encapsulation header to be filled in by x->type->output and
407 * the mac header will be set to the nextheader (protocol for
408 * IPv4) field of the extension header directly preceding the
409 * encapsulation header, or in its absence, that of the top IP
410 * header. The value of the network header will always point
411 * to the top IP header while skb->data will point to the payload.
413 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
416 * This is the actual output entry point.
418 * For transport mode and equivalent this would be identical to
419 * output2 (which does not need to be set). While tunnel mode
420 * and equivalent would set this to a tunnel encapsulation function
421 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
424 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
426 struct xfrm_state_afinfo
*afinfo
;
427 struct module
*owner
;
432 /* Flags for xfrm_mode. */
434 XFRM_MODE_FLAG_TUNNEL
= 1,
437 int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
438 int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
440 static inline int xfrm_af2proto(unsigned int family
)
452 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
454 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
455 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
456 return x
->inner_mode
;
458 return x
->inner_mode_iaf
;
462 /* id in template is interpreted as:
463 * daddr - destination of tunnel, may be zero for transport mode.
464 * spi - zero to acquire spi. Not zero if spi is static, then
465 * daddr must be fixed too.
466 * proto - AH/ESP/IPCOMP
470 /* Source address of tunnel. Ignored, if it is not a tunnel. */
471 xfrm_address_t saddr
;
473 unsigned short encap_family
;
477 /* Mode: transport, tunnel etc. */
480 /* Sharing mode: unique, this session only, this user only etc. */
483 /* May skip this transfomration if no SA is found */
486 /* Skip aalgos/ealgos/calgos checks. */
489 /* Bit mask of algos allowed for acquisition */
495 #define XFRM_MAX_DEPTH 6
497 struct xfrm_policy_walk_entry
{
498 struct list_head all
;
502 struct xfrm_policy_walk
{
503 struct xfrm_policy_walk_entry walk
;
508 struct xfrm_policy_queue
{
509 struct sk_buff_head hold_queue
;
510 struct timer_list hold_timer
;
511 unsigned long timeout
;
518 struct hlist_node bydst
;
519 struct hlist_node byidx
;
521 /* This lock only affects elements except for entry. */
524 struct timer_list timer
;
526 struct flow_cache_object flo
;
530 struct xfrm_mark mark
;
531 struct xfrm_selector selector
;
532 struct xfrm_lifetime_cfg lft
;
533 struct xfrm_lifetime_cur curlft
;
534 struct xfrm_policy_walk_entry walk
;
535 struct xfrm_policy_queue polq
;
541 struct xfrm_sec_ctx
*security
;
542 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
545 static inline struct net
*xp_net(const struct xfrm_policy
*xp
)
547 return read_pnet(&xp
->xp_net
);
550 struct xfrm_kmaddress
{
551 xfrm_address_t local
;
552 xfrm_address_t remote
;
557 struct xfrm_migrate
{
558 xfrm_address_t old_daddr
;
559 xfrm_address_t old_saddr
;
560 xfrm_address_t new_daddr
;
561 xfrm_address_t new_saddr
;
570 #define XFRM_KM_TIMEOUT 30
572 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
573 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
575 /* default aevent timeout in units of 100ms */
576 #define XFRM_AE_ETIME 10
577 /* Async Event timer multiplier */
578 #define XFRM_AE_ETH_M 10
579 /* default seq threshold size */
580 #define XFRM_AE_SEQT_SIZE 2
583 struct list_head list
;
585 int (*notify
)(struct xfrm_state
*x
, const struct km_event
*c
);
586 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
);
587 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
588 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
589 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, const struct km_event
*c
);
590 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
591 int (*migrate
)(const struct xfrm_selector
*sel
,
593 const struct xfrm_migrate
*m
,
595 const struct xfrm_kmaddress
*k
);
596 bool (*is_alive
)(const struct km_event
*c
);
599 int xfrm_register_km(struct xfrm_mgr
*km
);
600 int xfrm_unregister_km(struct xfrm_mgr
*km
);
602 struct xfrm_tunnel_skb_cb
{
604 struct inet_skb_parm h4
;
605 struct inet6_skb_parm h6
;
609 struct ip_tunnel
*ip4
;
614 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
617 * This structure is used for the duration where packets are being
618 * transformed by IPsec. As soon as the packet leaves IPsec the
619 * area beyond the generic IP part may be overwritten.
622 struct xfrm_tunnel_skb_cb header
;
624 /* Sequence number for replay protection. */
637 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
640 * This structure is used by the afinfo prepare_input/prepare_output functions
641 * to transmit header information to the mode input/output functions.
643 struct xfrm_mode_skb_cb
{
644 struct xfrm_tunnel_skb_cb header
;
646 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
650 /* IP header length (excluding options or extension headers). */
653 /* TOS for IPv4, class for IPv6. */
656 /* TTL for IPv4, hop limitfor IPv6. */
659 /* Protocol for IPv4, NH for IPv6. */
662 /* Option length for IPv4, zero for IPv6. */
665 /* Used by IPv6 only, zero for IPv4. */
669 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
672 * This structure is used by the input processing to locate the SPI and
673 * related information.
675 struct xfrm_spi_skb_cb
{
676 struct xfrm_tunnel_skb_cb header
;
678 unsigned int daddroff
;
682 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
684 /* Audit Information */
688 unsigned int sessionid
;
691 #ifdef CONFIG_AUDITSYSCALL
692 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
694 struct audit_buffer
*audit_buf
= NULL
;
696 if (audit_enabled
== 0)
698 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
699 AUDIT_MAC_IPSEC_EVENT
);
700 if (audit_buf
== NULL
)
702 audit_log_format(audit_buf
, "op=%s", op
);
706 static inline void xfrm_audit_helper_usrinfo(kuid_t auid
, unsigned int ses
, u32 secid
,
707 struct audit_buffer
*audit_buf
)
712 audit_log_format(audit_buf
, " auid=%u ses=%u",
713 from_kuid(&init_user_ns
, auid
), ses
);
715 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
716 audit_log_format(audit_buf
, " subj=%s", secctx
);
717 security_release_secctx(secctx
, secctx_len
);
719 audit_log_task_context(audit_buf
);
722 void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
, kuid_t auid
,
723 unsigned int ses
, u32 secid
);
724 void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
, kuid_t auid
,
725 unsigned int ses
, u32 secid
);
726 void xfrm_audit_state_add(struct xfrm_state
*x
, int result
, kuid_t auid
,
727 unsigned int ses
, u32 secid
);
728 void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
, kuid_t auid
,
729 unsigned int ses
, u32 secid
);
730 void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
731 struct sk_buff
*skb
);
732 void xfrm_audit_state_replay(struct xfrm_state
*x
, struct sk_buff
*skb
,
734 void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
735 void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
, __be32 net_spi
,
737 void xfrm_audit_state_icvfail(struct xfrm_state
*x
, struct sk_buff
*skb
,
741 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
742 kuid_t auid
, unsigned int ses
, u32 secid
)
746 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
747 kuid_t auid
, unsigned int ses
, u32 secid
)
751 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
752 kuid_t auid
, unsigned int ses
, u32 secid
)
756 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
757 kuid_t auid
, unsigned int ses
, u32 secid
)
761 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
766 static inline void xfrm_audit_state_replay(struct xfrm_state
*x
,
767 struct sk_buff
*skb
, __be32 net_seq
)
771 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
776 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
777 __be32 net_spi
, __be32 net_seq
)
781 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
782 struct sk_buff
*skb
, u8 proto
)
785 #endif /* CONFIG_AUDITSYSCALL */
787 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
789 if (likely(policy
!= NULL
))
790 atomic_inc(&policy
->refcnt
);
793 void xfrm_policy_destroy(struct xfrm_policy
*policy
);
795 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
797 if (atomic_dec_and_test(&policy
->refcnt
))
798 xfrm_policy_destroy(policy
);
801 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
804 for (i
= npols
- 1; i
>= 0; --i
)
805 xfrm_pol_put(pols
[i
]);
808 void __xfrm_state_destroy(struct xfrm_state
*);
810 static inline void __xfrm_state_put(struct xfrm_state
*x
)
812 atomic_dec(&x
->refcnt
);
815 static inline void xfrm_state_put(struct xfrm_state
*x
)
817 if (atomic_dec_and_test(&x
->refcnt
))
818 __xfrm_state_destroy(x
);
821 static inline void xfrm_state_hold(struct xfrm_state
*x
)
823 atomic_inc(&x
->refcnt
);
826 static inline bool addr_match(const void *token1
, const void *token2
,
829 const __be32
*a1
= token1
;
830 const __be32
*a2
= token2
;
834 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
835 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
838 if (memcmp(a1
, a2
, pdw
<< 2))
844 mask
= htonl((0xffffffff) << (32 - pbi
));
846 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
853 static inline bool addr4_match(__be32 a1
, __be32 a2
, u8 prefixlen
)
855 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
858 return !((a1
^ a2
) & htonl(0xFFFFFFFFu
<< (32 - prefixlen
)));
862 __be16
xfrm_flowi_sport(const struct flowi
*fl
, const union flowi_uli
*uli
)
865 switch(fl
->flowi_proto
) {
868 case IPPROTO_UDPLITE
:
870 port
= uli
->ports
.sport
;
874 port
= htons(uli
->icmpt
.type
);
877 port
= htons(uli
->mht
.type
);
880 port
= htons(ntohl(uli
->gre_key
) >> 16);
889 __be16
xfrm_flowi_dport(const struct flowi
*fl
, const union flowi_uli
*uli
)
892 switch(fl
->flowi_proto
) {
895 case IPPROTO_UDPLITE
:
897 port
= uli
->ports
.dport
;
901 port
= htons(uli
->icmpt
.code
);
904 port
= htons(ntohl(uli
->gre_key
) & 0xffff);
912 bool xfrm_selector_match(const struct xfrm_selector
*sel
,
913 const struct flowi
*fl
, unsigned short family
);
915 #ifdef CONFIG_SECURITY_NETWORK_XFRM
916 /* If neither has a context --> match
917 * Otherwise, both must have a context and the sids, doi, alg must match
919 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
921 return ((!s1
&& !s2
) ||
923 (s1
->ctx_sid
== s2
->ctx_sid
) &&
924 (s1
->ctx_doi
== s2
->ctx_doi
) &&
925 (s1
->ctx_alg
== s2
->ctx_alg
)));
928 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
934 /* A struct encoding bundle of transformations to apply to some set of flow.
936 * dst->child points to the next element of bundle.
937 * dst->xfrm points to an instanse of transformer.
939 * Due to unfortunate limitations of current routing cache, which we
940 * have no time to fix, it mirrors struct rtable and bound to the same
941 * routing key, including saddr,daddr. However, we can have many of
942 * bundles differing by session id. All the bundles grow from a parent
947 struct dst_entry dst
;
951 struct dst_entry
*route
;
952 struct flow_cache_object flo
;
953 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
954 int num_pols
, num_xfrms
;
955 #ifdef CONFIG_XFRM_SUB_POLICY
956 struct flowi
*origin
;
957 struct xfrm_selector
*partner
;
961 u32 route_mtu_cached
;
962 u32 child_mtu_cached
;
968 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
970 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
971 dst_release(xdst
->route
);
972 if (likely(xdst
->u
.dst
.xfrm
))
973 xfrm_state_put(xdst
->u
.dst
.xfrm
);
974 #ifdef CONFIG_XFRM_SUB_POLICY
977 kfree(xdst
->partner
);
978 xdst
->partner
= NULL
;
983 void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
988 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
991 static inline int secpath_exists(struct sk_buff
*skb
)
994 return skb
->sp
!= NULL
;
1000 static inline struct sec_path
*
1001 secpath_get(struct sec_path
*sp
)
1004 atomic_inc(&sp
->refcnt
);
1008 void __secpath_destroy(struct sec_path
*sp
);
1011 secpath_put(struct sec_path
*sp
)
1013 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
1014 __secpath_destroy(sp
);
1017 struct sec_path
*secpath_dup(struct sec_path
*src
);
1020 secpath_reset(struct sk_buff
*skb
)
1023 secpath_put(skb
->sp
);
1029 xfrm_addr_any(const xfrm_address_t
*addr
, unsigned short family
)
1033 return addr
->a4
== 0;
1035 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
1041 __xfrm4_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1043 return (tmpl
->saddr
.a4
&&
1044 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
1048 __xfrm6_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1050 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
1051 !ipv6_addr_equal((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
1055 xfrm_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
, unsigned short family
)
1059 return __xfrm4_state_addr_cmp(tmpl
, x
);
1061 return __xfrm6_state_addr_cmp(tmpl
, x
);
1067 int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
,
1068 unsigned short family
);
1070 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
1071 struct sk_buff
*skb
,
1072 unsigned int family
, int reverse
)
1074 struct net
*net
= dev_net(skb
->dev
);
1075 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
1077 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
1078 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1080 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1081 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
1082 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1085 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1087 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1090 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1092 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1095 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1097 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1100 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1101 struct sk_buff
*skb
)
1103 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1106 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1107 struct sk_buff
*skb
)
1109 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1112 int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1113 unsigned int family
, int reverse
);
1115 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1116 unsigned int family
)
1118 return __xfrm_decode_session(skb
, fl
, family
, 0);
1121 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1123 unsigned int family
)
1125 return __xfrm_decode_session(skb
, fl
, family
, 1);
1128 int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1130 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1132 struct net
*net
= dev_net(skb
->dev
);
1134 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1135 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1136 __xfrm_route_forward(skb
, family
);
1139 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1141 return xfrm_route_forward(skb
, AF_INET
);
1144 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1146 return xfrm_route_forward(skb
, AF_INET6
);
1149 int __xfrm_sk_clone_policy(struct sock
*sk
);
1151 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1153 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1154 return __xfrm_sk_clone_policy(sk
);
1158 int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1160 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1162 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1163 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1164 sk
->sk_policy
[0] = NULL
;
1166 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1167 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1168 sk
->sk_policy
[1] = NULL
;
1172 void xfrm_garbage_collect(struct net
*net
);
1176 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1177 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1178 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1179 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1180 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1184 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1188 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1192 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1194 unsigned int family
)
1198 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1199 struct sk_buff
*skb
)
1203 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1204 struct sk_buff
*skb
)
1208 static inline void xfrm_garbage_collect(struct net
*net
)
1214 xfrm_address_t
*xfrm_flowi_daddr(const struct flowi
*fl
, unsigned short family
)
1218 return (xfrm_address_t
*)&fl
->u
.ip4
.daddr
;
1220 return (xfrm_address_t
*)&fl
->u
.ip6
.daddr
;
1226 xfrm_address_t
*xfrm_flowi_saddr(const struct flowi
*fl
, unsigned short family
)
1230 return (xfrm_address_t
*)&fl
->u
.ip4
.saddr
;
1232 return (xfrm_address_t
*)&fl
->u
.ip6
.saddr
;
1238 void xfrm_flowi_addr_get(const struct flowi
*fl
,
1239 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1240 unsigned short family
)
1244 memcpy(&saddr
->a4
, &fl
->u
.ip4
.saddr
, sizeof(saddr
->a4
));
1245 memcpy(&daddr
->a4
, &fl
->u
.ip4
.daddr
, sizeof(daddr
->a4
));
1248 *(struct in6_addr
*)saddr
->a6
= fl
->u
.ip6
.saddr
;
1249 *(struct in6_addr
*)daddr
->a6
= fl
->u
.ip6
.daddr
;
1254 static __inline__
int
1255 __xfrm4_state_addr_check(const struct xfrm_state
*x
,
1256 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1258 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1259 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1264 static __inline__
int
1265 __xfrm6_state_addr_check(const struct xfrm_state
*x
,
1266 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1268 if (ipv6_addr_equal((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1269 (ipv6_addr_equal((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
) ||
1270 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1271 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1276 static __inline__
int
1277 xfrm_state_addr_check(const struct xfrm_state
*x
,
1278 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1279 unsigned short family
)
1283 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1285 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1290 static __inline__
int
1291 xfrm_state_addr_flow_check(const struct xfrm_state
*x
, const struct flowi
*fl
,
1292 unsigned short family
)
1296 return __xfrm4_state_addr_check(x
,
1297 (const xfrm_address_t
*)&fl
->u
.ip4
.daddr
,
1298 (const xfrm_address_t
*)&fl
->u
.ip4
.saddr
);
1300 return __xfrm6_state_addr_check(x
,
1301 (const xfrm_address_t
*)&fl
->u
.ip6
.daddr
,
1302 (const xfrm_address_t
*)&fl
->u
.ip6
.saddr
);
1307 static inline int xfrm_state_kern(const struct xfrm_state
*x
)
1309 return atomic_read(&x
->tunnel_users
);
1312 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1314 return (!userproto
|| proto
== userproto
||
1315 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1316 proto
== IPPROTO_ESP
||
1317 proto
== IPPROTO_COMP
)));
1321 * xfrm algorithm information
1323 struct xfrm_algo_aead_info
{
1327 struct xfrm_algo_auth_info
{
1332 struct xfrm_algo_encr_info
{
1337 struct xfrm_algo_comp_info
{
1341 struct xfrm_algo_desc
{
1345 u8 pfkey_supported
:1;
1347 struct xfrm_algo_aead_info aead
;
1348 struct xfrm_algo_auth_info auth
;
1349 struct xfrm_algo_encr_info encr
;
1350 struct xfrm_algo_comp_info comp
;
1352 struct sadb_alg desc
;
1355 /* XFRM protocol handlers. */
1356 struct xfrm4_protocol
{
1357 int (*handler
)(struct sk_buff
*skb
);
1358 int (*input_handler
)(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1360 int (*cb_handler
)(struct sk_buff
*skb
, int err
);
1361 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1363 struct xfrm4_protocol __rcu
*next
;
1367 /* XFRM tunnel handlers. */
1368 struct xfrm_tunnel
{
1369 int (*handler
)(struct sk_buff
*skb
);
1370 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1372 struct xfrm_tunnel __rcu
*next
;
1376 struct xfrm_tunnel_notifier
{
1377 int (*handler
)(struct sk_buff
*skb
);
1378 struct xfrm_tunnel_notifier __rcu
*next
;
1382 struct xfrm6_tunnel
{
1383 int (*handler
)(struct sk_buff
*skb
);
1384 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1385 u8 type
, u8 code
, int offset
, __be32 info
);
1386 struct xfrm6_tunnel __rcu
*next
;
1390 void xfrm_init(void);
1391 void xfrm4_init(void);
1392 int xfrm_state_init(struct net
*net
);
1393 void xfrm_state_fini(struct net
*net
);
1394 void xfrm4_state_init(void);
1396 int xfrm6_init(void);
1397 void xfrm6_fini(void);
1398 int xfrm6_state_init(void);
1399 void xfrm6_state_fini(void);
1401 static inline int xfrm6_init(void)
1405 static inline void xfrm6_fini(void)
1411 #ifdef CONFIG_XFRM_STATISTICS
1412 int xfrm_proc_init(struct net
*net
);
1413 void xfrm_proc_fini(struct net
*net
);
1416 int xfrm_sysctl_init(struct net
*net
);
1417 #ifdef CONFIG_SYSCTL
1418 void xfrm_sysctl_fini(struct net
*net
);
1420 static inline void xfrm_sysctl_fini(struct net
*net
)
1425 void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
,
1426 struct xfrm_filter
*filter
);
1427 int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1428 int (*func
)(struct xfrm_state
*, int, void*), void *);
1429 void xfrm_state_walk_done(struct xfrm_state_walk
*walk
, struct net
*net
);
1430 struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1431 struct xfrm_state
*xfrm_state_find(const xfrm_address_t
*daddr
,
1432 const xfrm_address_t
*saddr
,
1433 const struct flowi
*fl
,
1434 struct xfrm_tmpl
*tmpl
,
1435 struct xfrm_policy
*pol
, int *err
,
1436 unsigned short family
);
1437 struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1438 xfrm_address_t
*daddr
,
1439 xfrm_address_t
*saddr
,
1440 unsigned short family
,
1441 u8 mode
, u8 proto
, u32 reqid
);
1442 struct xfrm_state
*xfrm_state_lookup_byspi(struct net
*net
, __be32 spi
,
1443 unsigned short family
);
1444 int xfrm_state_check_expire(struct xfrm_state
*x
);
1445 void xfrm_state_insert(struct xfrm_state
*x
);
1446 int xfrm_state_add(struct xfrm_state
*x
);
1447 int xfrm_state_update(struct xfrm_state
*x
);
1448 struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1449 const xfrm_address_t
*daddr
, __be32 spi
,
1450 u8 proto
, unsigned short family
);
1451 struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1452 const xfrm_address_t
*daddr
,
1453 const xfrm_address_t
*saddr
,
1455 unsigned short family
);
1456 #ifdef CONFIG_XFRM_SUB_POLICY
1457 int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
,
1458 unsigned short family
, struct net
*net
);
1459 int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
,
1460 unsigned short family
);
1462 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1463 int n
, unsigned short family
, struct net
*net
)
1468 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1469 int n
, unsigned short family
)
1475 struct xfrmk_sadinfo
{
1476 u32 sadhcnt
; /* current hash bkts */
1477 u32 sadhmcnt
; /* max allowed hash bkts */
1478 u32 sadcnt
; /* current running count */
1481 struct xfrmk_spdinfo
{
1492 struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
);
1493 int xfrm_state_delete(struct xfrm_state
*x
);
1494 int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1495 void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1496 void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1497 u32
xfrm_replay_seqhi(struct xfrm_state
*x
, __be32 net_seq
);
1498 int xfrm_init_replay(struct xfrm_state
*x
);
1499 int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1500 int __xfrm_init_state(struct xfrm_state
*x
, bool init_replay
);
1501 int xfrm_init_state(struct xfrm_state
*x
);
1502 int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1503 int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
, int encap_type
);
1504 int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1505 int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1506 int xfrm_output(struct sk_buff
*skb
);
1507 int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1508 void xfrm_local_error(struct sk_buff
*skb
, int mtu
);
1509 int xfrm4_extract_header(struct sk_buff
*skb
);
1510 int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1511 int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1513 int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1514 int xfrm4_rcv(struct sk_buff
*skb
);
1516 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1518 XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip4
= NULL
;
1519 XFRM_SPI_SKB_CB(skb
)->family
= AF_INET
;
1520 XFRM_SPI_SKB_CB(skb
)->daddroff
= offsetof(struct iphdr
, daddr
);
1521 return xfrm_input(skb
, nexthdr
, spi
, 0);
1524 int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1525 int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1526 int xfrm4_output(struct sk_buff
*skb
);
1527 int xfrm4_output_finish(struct sk_buff
*skb
);
1528 int xfrm4_rcv_cb(struct sk_buff
*skb
, u8 protocol
, int err
);
1529 int xfrm4_protocol_register(struct xfrm4_protocol
*handler
, unsigned char protocol
);
1530 int xfrm4_protocol_deregister(struct xfrm4_protocol
*handler
, unsigned char protocol
);
1531 int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1532 int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1533 void xfrm4_local_error(struct sk_buff
*skb
, u32 mtu
);
1534 int xfrm4_mode_tunnel_input_register(struct xfrm_tunnel_notifier
*handler
);
1535 int xfrm4_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier
*handler
);
1536 int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier
*handler
);
1537 int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier
*handler
);
1538 int xfrm6_extract_header(struct sk_buff
*skb
);
1539 int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1540 int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1541 int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1542 int xfrm6_rcv(struct sk_buff
*skb
);
1543 int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1544 xfrm_address_t
*saddr
, u8 proto
);
1545 void xfrm6_local_error(struct sk_buff
*skb
, u32 mtu
);
1546 int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1547 int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1548 __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1549 __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, const xfrm_address_t
*saddr
);
1550 int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1551 int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1552 int xfrm6_output(struct sk_buff
*skb
);
1553 int xfrm6_output_finish(struct sk_buff
*skb
);
1554 int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1558 int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1559 int xfrm_user_policy(struct sock
*sk
, int optname
,
1560 u8 __user
*optval
, int optlen
);
1562 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1564 return -ENOPROTOOPT
;
1567 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1569 /* should not happen */
1575 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1577 void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1578 int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1579 int (*func
)(struct xfrm_policy
*, int, int, void*),
1581 void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
, struct net
*net
);
1582 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1583 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1585 struct xfrm_selector
*sel
,
1586 struct xfrm_sec_ctx
*ctx
, int delete,
1588 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
,
1589 u32 id
, int delete, int *err
);
1590 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1591 u32
xfrm_get_acqseq(void);
1592 int verify_spi_info(u8 proto
, u32 min
, u32 max
);
1593 int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1594 struct xfrm_state
*xfrm_find_acq(struct net
*net
, const struct xfrm_mark
*mark
,
1595 u8 mode
, u32 reqid
, u8 proto
,
1596 const xfrm_address_t
*daddr
,
1597 const xfrm_address_t
*saddr
, int create
,
1598 unsigned short family
);
1599 int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1601 #ifdef CONFIG_XFRM_MIGRATE
1602 int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1603 const struct xfrm_migrate
*m
, int num_bundles
,
1604 const struct xfrm_kmaddress
*k
);
1605 struct xfrm_state
*xfrm_migrate_state_find(struct xfrm_migrate
*m
, struct net
*net
);
1606 struct xfrm_state
*xfrm_state_migrate(struct xfrm_state
*x
,
1607 struct xfrm_migrate
*m
);
1608 int xfrm_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1609 struct xfrm_migrate
*m
, int num_bundles
,
1610 struct xfrm_kmaddress
*k
, struct net
*net
);
1613 int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1614 void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 portid
);
1615 int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
,
1616 xfrm_address_t
*addr
);
1618 void xfrm_input_init(void);
1619 int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1621 void xfrm_probe_algs(void);
1622 int xfrm_count_pfkey_auth_supported(void);
1623 int xfrm_count_pfkey_enc_supported(void);
1624 struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1625 struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1626 struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1627 struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1628 struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1629 struct xfrm_algo_desc
*xfrm_aalg_get_byname(const char *name
, int probe
);
1630 struct xfrm_algo_desc
*xfrm_ealg_get_byname(const char *name
, int probe
);
1631 struct xfrm_algo_desc
*xfrm_calg_get_byname(const char *name
, int probe
);
1632 struct xfrm_algo_desc
*xfrm_aead_get_byname(const char *name
, int icv_len
,
1635 static inline bool xfrm6_addr_equal(const xfrm_address_t
*a
,
1636 const xfrm_address_t
*b
)
1638 return ipv6_addr_equal((const struct in6_addr
*)a
,
1639 (const struct in6_addr
*)b
);
1642 static inline bool xfrm_addr_equal(const xfrm_address_t
*a
,
1643 const xfrm_address_t
*b
,
1649 return ((__force u32
)a
->a4
^ (__force u32
)b
->a4
) == 0;
1651 return xfrm6_addr_equal(a
, b
);
1655 static inline int xfrm_policy_id2dir(u32 index
)
1661 static inline int xfrm_aevent_is_on(struct net
*net
)
1667 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1669 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1674 static inline int xfrm_acquire_is_on(struct net
*net
)
1680 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1682 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_ACQUIRE
);
1689 static inline int xfrm_alg_len(const struct xfrm_algo
*alg
)
1691 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1694 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth
*alg
)
1696 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1699 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn
*replay_esn
)
1701 return sizeof(*replay_esn
) + replay_esn
->bmp_len
* sizeof(__u32
);
1704 #ifdef CONFIG_XFRM_MIGRATE
1705 static inline int xfrm_replay_clone(struct xfrm_state
*x
,
1706 struct xfrm_state
*orig
)
1708 x
->replay_esn
= kzalloc(xfrm_replay_state_esn_len(orig
->replay_esn
),
1713 x
->replay_esn
->bmp_len
= orig
->replay_esn
->bmp_len
;
1714 x
->replay_esn
->replay_window
= orig
->replay_esn
->replay_window
;
1716 x
->preplay_esn
= kmemdup(x
->replay_esn
,
1717 xfrm_replay_state_esn_len(x
->replay_esn
),
1719 if (!x
->preplay_esn
) {
1720 kfree(x
->replay_esn
);
1727 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1729 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1732 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1734 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1737 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1740 for (i
= 0; i
< n
; i
++)
1741 xfrm_state_put(*(states
+ i
));
1744 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1747 for (i
= 0; i
< n
; i
++)
1748 xfrm_state_delete(*(states
+ i
));
1753 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1755 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1759 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1761 if (attrs
[XFRMA_MARK
])
1762 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1769 static inline int xfrm_mark_put(struct sk_buff
*skb
, const struct xfrm_mark
*m
)
1774 ret
= nla_put(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1778 static inline int xfrm_rcv_cb(struct sk_buff
*skb
, unsigned int family
,
1779 u8 protocol
, int err
)
1784 return xfrm4_rcv_cb(skb
, protocol
, err
);
1790 static inline int xfrm_tunnel_check(struct sk_buff
*skb
, struct xfrm_state
*x
,
1791 unsigned int family
)
1793 bool tunnel
= false;
1797 if (XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip4
)
1801 if (XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip6
)
1805 if (tunnel
&& !(x
->outer_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
))
1810 #endif /* _NET_XFRM_H */