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 const xfrm_address_t
*saddr
,
271 const 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
)(const 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
,
282 const struct flowi
*fl
);
283 struct dst_entry
*(*blackhole_route
)(struct net
*net
, struct dst_entry
*orig
);
286 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
287 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
288 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
);
289 extern void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
);
292 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
293 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
294 extern int __xfrm_state_delete(struct xfrm_state
*x
);
296 struct xfrm_state_afinfo
{
300 struct module
*owner
;
301 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
302 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
303 int (*init_flags
)(struct xfrm_state
*x
);
304 void (*init_tempsel
)(struct xfrm_selector
*sel
,
305 const struct flowi
*fl
);
306 void (*init_temprop
)(struct xfrm_state
*x
,
307 const struct xfrm_tmpl
*tmpl
,
308 const xfrm_address_t
*daddr
,
309 const xfrm_address_t
*saddr
);
310 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
311 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
312 int (*output
)(struct sk_buff
*skb
);
313 int (*extract_input
)(struct xfrm_state
*x
,
314 struct sk_buff
*skb
);
315 int (*extract_output
)(struct xfrm_state
*x
,
316 struct sk_buff
*skb
);
317 int (*transport_finish
)(struct sk_buff
*skb
,
321 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
322 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
324 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
328 struct module
*owner
;
331 #define XFRM_TYPE_NON_FRAGMENT 1
332 #define XFRM_TYPE_REPLAY_PROT 2
333 #define XFRM_TYPE_LOCAL_COADDR 4
334 #define XFRM_TYPE_REMOTE_COADDR 8
336 int (*init_state
)(struct xfrm_state
*x
);
337 void (*destructor
)(struct xfrm_state
*);
338 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
339 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
340 int (*reject
)(struct xfrm_state
*, struct sk_buff
*,
341 const struct flowi
*);
342 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
343 /* Estimate maximal size of result of transformation of a dgram */
344 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
347 extern int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
348 extern int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
352 * Remove encapsulation header.
354 * The IP header will be moved over the top of the encapsulation
357 * On entry, the transport header shall point to where the IP header
358 * should be and the network header shall be set to where the IP
359 * header currently is. skb->data shall point to the start of the
362 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
365 * This is the actual input entry point.
367 * For transport mode and equivalent this would be identical to
368 * input2 (which does not need to be set). While tunnel mode
369 * and equivalent would set this to the tunnel encapsulation function
370 * xfrm4_prepare_input that would in turn call input2.
372 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
375 * Add encapsulation header.
377 * On exit, the transport header will be set to the start of the
378 * encapsulation header to be filled in by x->type->output and
379 * the mac header will be set to the nextheader (protocol for
380 * IPv4) field of the extension header directly preceding the
381 * encapsulation header, or in its absence, that of the top IP
382 * header. The value of the network header will always point
383 * to the top IP header while skb->data will point to the payload.
385 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
388 * This is the actual output entry point.
390 * For transport mode and equivalent this would be identical to
391 * output2 (which does not need to be set). While tunnel mode
392 * and equivalent would set this to a tunnel encapsulation function
393 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
396 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
398 struct xfrm_state_afinfo
*afinfo
;
399 struct module
*owner
;
404 /* Flags for xfrm_mode. */
406 XFRM_MODE_FLAG_TUNNEL
= 1,
409 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
410 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
412 static inline int xfrm_af2proto(unsigned int family
)
424 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
426 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
427 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
428 return x
->inner_mode
;
430 return x
->inner_mode_iaf
;
434 /* id in template is interpreted as:
435 * daddr - destination of tunnel, may be zero for transport mode.
436 * spi - zero to acquire spi. Not zero if spi is static, then
437 * daddr must be fixed too.
438 * proto - AH/ESP/IPCOMP
442 /* Source address of tunnel. Ignored, if it is not a tunnel. */
443 xfrm_address_t saddr
;
445 unsigned short encap_family
;
449 /* Mode: transport, tunnel etc. */
452 /* Sharing mode: unique, this session only, this user only etc. */
455 /* May skip this transfomration if no SA is found */
458 /* Skip aalgos/ealgos/calgos checks. */
461 /* Bit mask of algos allowed for acquisition */
467 #define XFRM_MAX_DEPTH 6
469 struct xfrm_policy_walk_entry
{
470 struct list_head all
;
474 struct xfrm_policy_walk
{
475 struct xfrm_policy_walk_entry walk
;
484 struct hlist_node bydst
;
485 struct hlist_node byidx
;
487 /* This lock only affects elements except for entry. */
490 struct timer_list timer
;
492 struct flow_cache_object flo
;
496 struct xfrm_mark mark
;
497 struct xfrm_selector selector
;
498 struct xfrm_lifetime_cfg lft
;
499 struct xfrm_lifetime_cur curlft
;
500 struct xfrm_policy_walk_entry walk
;
506 struct xfrm_sec_ctx
*security
;
507 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
510 static inline struct net
*xp_net(const struct xfrm_policy
*xp
)
512 return read_pnet(&xp
->xp_net
);
515 struct xfrm_kmaddress
{
516 xfrm_address_t local
;
517 xfrm_address_t remote
;
522 struct xfrm_migrate
{
523 xfrm_address_t old_daddr
;
524 xfrm_address_t old_saddr
;
525 xfrm_address_t new_daddr
;
526 xfrm_address_t new_saddr
;
535 #define XFRM_KM_TIMEOUT 30
537 #define XFRM_REPLAY_SEQ 1
538 #define XFRM_REPLAY_OSEQ 2
539 #define XFRM_REPLAY_SEQ_MASK 3
541 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
542 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
544 /* default aevent timeout in units of 100ms */
545 #define XFRM_AE_ETIME 10
546 /* Async Event timer multiplier */
547 #define XFRM_AE_ETH_M 10
548 /* default seq threshold size */
549 #define XFRM_AE_SEQT_SIZE 2
552 struct list_head list
;
554 int (*notify
)(struct xfrm_state
*x
, const struct km_event
*c
);
555 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
556 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
557 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
558 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, const struct km_event
*c
);
559 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
560 int (*migrate
)(const struct xfrm_selector
*sel
,
562 const struct xfrm_migrate
*m
,
564 const struct xfrm_kmaddress
*k
);
567 extern int xfrm_register_km(struct xfrm_mgr
*km
);
568 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
571 * This structure is used for the duration where packets are being
572 * transformed by IPsec. As soon as the packet leaves IPsec the
573 * area beyond the generic IP part may be overwritten.
577 struct inet_skb_parm h4
;
578 struct inet6_skb_parm h6
;
581 /* Sequence number for replay protection. */
588 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
591 * This structure is used by the afinfo prepare_input/prepare_output functions
592 * to transmit header information to the mode input/output functions.
594 struct xfrm_mode_skb_cb
{
596 struct inet_skb_parm h4
;
597 struct inet6_skb_parm h6
;
600 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
604 /* IP header length (excluding options or extension headers). */
607 /* TOS for IPv4, class for IPv6. */
610 /* TTL for IPv4, hop limitfor IPv6. */
613 /* Protocol for IPv4, NH for IPv6. */
616 /* Option length for IPv4, zero for IPv6. */
619 /* Used by IPv6 only, zero for IPv4. */
623 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
626 * This structure is used by the input processing to locate the SPI and
627 * related information.
629 struct xfrm_spi_skb_cb
{
631 struct inet_skb_parm h4
;
632 struct inet6_skb_parm h6
;
635 unsigned int daddroff
;
639 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
641 /* Audit Information */
648 #ifdef CONFIG_AUDITSYSCALL
649 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
651 struct audit_buffer
*audit_buf
= NULL
;
653 if (audit_enabled
== 0)
655 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
656 AUDIT_MAC_IPSEC_EVENT
);
657 if (audit_buf
== NULL
)
659 audit_log_format(audit_buf
, "op=%s", op
);
663 static inline void xfrm_audit_helper_usrinfo(uid_t auid
, u32 ses
, u32 secid
,
664 struct audit_buffer
*audit_buf
)
669 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
671 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
672 audit_log_format(audit_buf
, " subj=%s", secctx
);
673 security_release_secctx(secctx
, secctx_len
);
675 audit_log_task_context(audit_buf
);
678 extern void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
679 u32 auid
, u32 ses
, u32 secid
);
680 extern void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
681 u32 auid
, u32 ses
, u32 secid
);
682 extern void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
683 u32 auid
, u32 ses
, u32 secid
);
684 extern void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
685 u32 auid
, u32 ses
, u32 secid
);
686 extern void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
687 struct sk_buff
*skb
);
688 extern void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
689 extern void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
690 __be32 net_spi
, __be32 net_seq
);
691 extern void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
692 struct sk_buff
*skb
, u8 proto
);
695 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
696 u32 auid
, u32 ses
, u32 secid
)
700 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
701 u32 auid
, u32 ses
, u32 secid
)
705 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
706 u32 auid
, u32 ses
, u32 secid
)
710 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
711 u32 auid
, u32 ses
, u32 secid
)
715 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
720 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
725 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
726 __be32 net_spi
, __be32 net_seq
)
730 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
731 struct sk_buff
*skb
, u8 proto
)
734 #endif /* CONFIG_AUDITSYSCALL */
736 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
738 if (likely(policy
!= NULL
))
739 atomic_inc(&policy
->refcnt
);
742 extern void xfrm_policy_destroy(struct xfrm_policy
*policy
);
744 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
746 if (atomic_dec_and_test(&policy
->refcnt
))
747 xfrm_policy_destroy(policy
);
750 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
753 for (i
= npols
- 1; i
>= 0; --i
)
754 xfrm_pol_put(pols
[i
]);
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 bool addr_match(const void *token1
, const void *token2
,
778 const __be32
*a1
= token1
;
779 const __be32
*a2
= token2
;
783 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
784 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
787 if (memcmp(a1
, a2
, pdw
<< 2))
793 mask
= htonl((0xffffffff) << (32 - pbi
));
795 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
803 __be16
xfrm_flowi_sport(const struct flowi
*fl
)
806 switch(fl
->flowi_proto
) {
809 case IPPROTO_UDPLITE
:
811 port
= fl
->fl_ip_sport
;
815 port
= htons(fl
->fl_icmp_type
);
818 port
= htons(fl
->fl_mh_type
);
821 port
= htons(ntohl(fl
->fl_gre_key
) >> 16);
830 __be16
xfrm_flowi_dport(const struct flowi
*fl
)
833 switch(fl
->flowi_proto
) {
836 case IPPROTO_UDPLITE
:
838 port
= fl
->fl_ip_dport
;
842 port
= htons(fl
->fl_icmp_code
);
845 port
= htons(ntohl(fl
->fl_gre_key
) & 0xffff);
853 extern int xfrm_selector_match(const struct xfrm_selector
*sel
,
854 const struct flowi
*fl
,
855 unsigned short family
);
857 #ifdef CONFIG_SECURITY_NETWORK_XFRM
858 /* If neither has a context --> match
859 * Otherwise, both must have a context and the sids, doi, alg must match
861 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
863 return ((!s1
&& !s2
) ||
865 (s1
->ctx_sid
== s2
->ctx_sid
) &&
866 (s1
->ctx_doi
== s2
->ctx_doi
) &&
867 (s1
->ctx_alg
== s2
->ctx_alg
)));
870 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
876 /* A struct encoding bundle of transformations to apply to some set of flow.
878 * dst->child points to the next element of bundle.
879 * dst->xfrm points to an instanse of transformer.
881 * Due to unfortunate limitations of current routing cache, which we
882 * have no time to fix, it mirrors struct rtable and bound to the same
883 * routing key, including saddr,daddr. However, we can have many of
884 * bundles differing by session id. All the bundles grow from a parent
889 struct dst_entry dst
;
893 struct dst_entry
*route
;
894 struct flow_cache_object flo
;
895 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
896 int num_pols
, num_xfrms
;
897 #ifdef CONFIG_XFRM_SUB_POLICY
898 struct flowi
*origin
;
899 struct xfrm_selector
*partner
;
903 u32 route_mtu_cached
;
904 u32 child_mtu_cached
;
910 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
912 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
913 dst_release(xdst
->route
);
914 if (likely(xdst
->u
.dst
.xfrm
))
915 xfrm_state_put(xdst
->u
.dst
.xfrm
);
916 #ifdef CONFIG_XFRM_SUB_POLICY
919 kfree(xdst
->partner
);
920 xdst
->partner
= NULL
;
925 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
930 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
933 static inline struct sec_path
*
934 secpath_get(struct sec_path
*sp
)
937 atomic_inc(&sp
->refcnt
);
941 extern void __secpath_destroy(struct sec_path
*sp
);
944 secpath_put(struct sec_path
*sp
)
946 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
947 __secpath_destroy(sp
);
950 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
953 secpath_reset(struct sk_buff
*skb
)
956 secpath_put(skb
->sp
);
962 xfrm_addr_any(const xfrm_address_t
*addr
, unsigned short family
)
966 return addr
->a4
== 0;
968 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
974 __xfrm4_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
976 return (tmpl
->saddr
.a4
&&
977 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
981 __xfrm6_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
983 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
984 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
988 xfrm_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
, unsigned short family
)
992 return __xfrm4_state_addr_cmp(tmpl
, x
);
994 return __xfrm6_state_addr_cmp(tmpl
, x
);
1000 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
1002 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
1003 struct sk_buff
*skb
,
1004 unsigned int family
, int reverse
)
1006 struct net
*net
= dev_net(skb
->dev
);
1007 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
1009 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
1010 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1012 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1013 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
1014 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1017 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1019 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1022 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1024 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1027 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1029 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1032 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1033 struct sk_buff
*skb
)
1035 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1038 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1039 struct sk_buff
*skb
)
1041 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1044 extern int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1045 unsigned int family
, int reverse
);
1047 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1048 unsigned int family
)
1050 return __xfrm_decode_session(skb
, fl
, family
, 0);
1053 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1055 unsigned int family
)
1057 return __xfrm_decode_session(skb
, fl
, family
, 1);
1060 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1062 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1064 struct net
*net
= dev_net(skb
->dev
);
1066 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1067 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1068 __xfrm_route_forward(skb
, family
);
1071 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1073 return xfrm_route_forward(skb
, AF_INET
);
1076 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1078 return xfrm_route_forward(skb
, AF_INET6
);
1081 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
1083 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1085 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1086 return __xfrm_sk_clone_policy(sk
);
1090 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1092 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1094 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1095 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1096 sk
->sk_policy
[0] = NULL
;
1098 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1099 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1100 sk
->sk_policy
[1] = NULL
;
1106 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1107 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1108 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1109 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1110 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1114 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1118 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1122 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1124 unsigned int family
)
1128 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1129 struct sk_buff
*skb
)
1133 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1134 struct sk_buff
*skb
)
1141 xfrm_address_t
*xfrm_flowi_daddr(const struct flowi
*fl
, unsigned short family
)
1145 return (xfrm_address_t
*)&fl
->fl4_dst
;
1147 return (xfrm_address_t
*)&fl
->fl6_dst
;
1153 xfrm_address_t
*xfrm_flowi_saddr(const struct flowi
*fl
, unsigned short family
)
1157 return (xfrm_address_t
*)&fl
->fl4_src
;
1159 return (xfrm_address_t
*)&fl
->fl6_src
;
1165 void xfrm_flowi_addr_get(const struct flowi
*fl
,
1166 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1167 unsigned short family
)
1171 memcpy(&saddr
->a4
, &fl
->fl4_src
, sizeof(saddr
->a4
));
1172 memcpy(&daddr
->a4
, &fl
->fl4_dst
, sizeof(daddr
->a4
));
1175 ipv6_addr_copy((struct in6_addr
*)&saddr
->a6
, &fl
->fl6_src
);
1176 ipv6_addr_copy((struct in6_addr
*)&daddr
->a6
, &fl
->fl6_dst
);
1181 static __inline__
int
1182 __xfrm4_state_addr_check(const struct xfrm_state
*x
,
1183 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1185 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1186 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1191 static __inline__
int
1192 __xfrm6_state_addr_check(const struct xfrm_state
*x
,
1193 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1195 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1196 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
1197 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1198 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1203 static __inline__
int
1204 xfrm_state_addr_check(const struct xfrm_state
*x
,
1205 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1206 unsigned short family
)
1210 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1212 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1217 static __inline__
int
1218 xfrm_state_addr_flow_check(const struct xfrm_state
*x
, const struct flowi
*fl
,
1219 unsigned short family
)
1223 return __xfrm4_state_addr_check(x
,
1224 (const xfrm_address_t
*)&fl
->fl4_dst
,
1225 (const xfrm_address_t
*)&fl
->fl4_src
);
1227 return __xfrm6_state_addr_check(x
,
1228 (const xfrm_address_t
*)&fl
->fl6_dst
,
1229 (const xfrm_address_t
*)&fl
->fl6_src
);
1234 static inline int xfrm_state_kern(const struct xfrm_state
*x
)
1236 return atomic_read(&x
->tunnel_users
);
1239 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1241 return (!userproto
|| proto
== userproto
||
1242 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1243 proto
== IPPROTO_ESP
||
1244 proto
== IPPROTO_COMP
)));
1248 * xfrm algorithm information
1250 struct xfrm_algo_aead_info
{
1254 struct xfrm_algo_auth_info
{
1259 struct xfrm_algo_encr_info
{
1264 struct xfrm_algo_comp_info
{
1268 struct xfrm_algo_desc
{
1273 struct xfrm_algo_aead_info aead
;
1274 struct xfrm_algo_auth_info auth
;
1275 struct xfrm_algo_encr_info encr
;
1276 struct xfrm_algo_comp_info comp
;
1278 struct sadb_alg desc
;
1281 /* XFRM tunnel handlers. */
1282 struct xfrm_tunnel
{
1283 int (*handler
)(struct sk_buff
*skb
);
1284 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1286 struct xfrm_tunnel __rcu
*next
;
1290 struct xfrm6_tunnel
{
1291 int (*handler
)(struct sk_buff
*skb
);
1292 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1293 u8 type
, u8 code
, int offset
, __be32 info
);
1294 struct xfrm6_tunnel __rcu
*next
;
1298 extern void xfrm_init(void);
1299 extern void xfrm4_init(int rt_hash_size
);
1300 extern int xfrm_state_init(struct net
*net
);
1301 extern void xfrm_state_fini(struct net
*net
);
1302 extern void xfrm4_state_init(void);
1304 extern int xfrm6_init(void);
1305 extern void xfrm6_fini(void);
1306 extern int xfrm6_state_init(void);
1307 extern void xfrm6_state_fini(void);
1309 static inline int xfrm6_init(void)
1313 static inline void xfrm6_fini(void)
1319 #ifdef CONFIG_XFRM_STATISTICS
1320 extern int xfrm_proc_init(struct net
*net
);
1321 extern void xfrm_proc_fini(struct net
*net
);
1324 extern int xfrm_sysctl_init(struct net
*net
);
1325 #ifdef CONFIG_SYSCTL
1326 extern void xfrm_sysctl_fini(struct net
*net
);
1328 static inline void xfrm_sysctl_fini(struct net
*net
)
1333 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1334 extern int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1335 int (*func
)(struct xfrm_state
*, int, void*), void *);
1336 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1337 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1338 extern struct xfrm_state
*xfrm_state_find(const xfrm_address_t
*daddr
,
1339 const xfrm_address_t
*saddr
,
1340 const struct flowi
*fl
,
1341 struct xfrm_tmpl
*tmpl
,
1342 struct xfrm_policy
*pol
, int *err
,
1343 unsigned short family
);
1344 extern struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1345 xfrm_address_t
*daddr
,
1346 xfrm_address_t
*saddr
,
1347 unsigned short family
,
1348 u8 mode
, u8 proto
, u32 reqid
);
1349 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1350 extern void xfrm_state_insert(struct xfrm_state
*x
);
1351 extern int xfrm_state_add(struct xfrm_state
*x
);
1352 extern int xfrm_state_update(struct xfrm_state
*x
);
1353 extern struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1354 const xfrm_address_t
*daddr
, __be32 spi
,
1355 u8 proto
, unsigned short family
);
1356 extern struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1357 const xfrm_address_t
*daddr
,
1358 const xfrm_address_t
*saddr
,
1360 unsigned short family
);
1361 #ifdef CONFIG_XFRM_SUB_POLICY
1362 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1363 int n
, unsigned short family
);
1364 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1365 int n
, unsigned short family
);
1367 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1368 int n
, unsigned short family
)
1373 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1374 int n
, unsigned short family
)
1380 struct xfrmk_sadinfo
{
1381 u32 sadhcnt
; /* current hash bkts */
1382 u32 sadhmcnt
; /* max allowed hash bkts */
1383 u32 sadcnt
; /* current running count */
1386 struct xfrmk_spdinfo
{
1397 extern struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
,
1399 extern int xfrm_state_delete(struct xfrm_state
*x
);
1400 extern int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1401 extern void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1402 extern void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1403 extern int xfrm_replay_check(struct xfrm_state
*x
,
1404 struct sk_buff
*skb
, __be32 seq
);
1405 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
1406 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
1407 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1408 extern int xfrm_init_state(struct xfrm_state
*x
);
1409 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1410 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1412 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1413 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1414 extern int xfrm_output(struct sk_buff
*skb
);
1415 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1416 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1417 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1418 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1420 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1421 extern int xfrm4_rcv(struct sk_buff
*skb
);
1423 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1425 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1428 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1429 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1430 extern int xfrm4_output(struct sk_buff
*skb
);
1431 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1432 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1433 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1434 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1435 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1436 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1437 extern int xfrm6_rcv(struct sk_buff
*skb
);
1438 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1439 xfrm_address_t
*saddr
, u8 proto
);
1440 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1441 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1442 extern __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1443 extern __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, xfrm_address_t
*saddr
);
1444 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1445 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1446 extern int xfrm6_output(struct sk_buff
*skb
);
1447 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1451 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1452 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1454 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1456 return -ENOPROTOOPT
;
1459 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1461 /* should not happen */
1467 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1469 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1470 extern int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1471 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1472 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1473 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1474 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1476 struct xfrm_selector
*sel
,
1477 struct xfrm_sec_ctx
*ctx
, int delete,
1479 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
, u32 id
, int delete, int *err
);
1480 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1481 u32
xfrm_get_acqseq(void);
1482 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1483 struct xfrm_state
*xfrm_find_acq(struct net
*net
, struct xfrm_mark
*mark
,
1484 u8 mode
, u32 reqid
, u8 proto
,
1485 const xfrm_address_t
*daddr
,
1486 const xfrm_address_t
*saddr
, int create
,
1487 unsigned short family
);
1488 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1490 #ifdef CONFIG_XFRM_MIGRATE
1491 extern int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1492 const struct xfrm_migrate
*m
, int num_bundles
,
1493 const struct xfrm_kmaddress
*k
);
1494 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1495 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1496 struct xfrm_migrate
*m
);
1497 extern int xfrm_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1498 struct xfrm_migrate
*m
, int num_bundles
,
1499 struct xfrm_kmaddress
*k
);
1502 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1503 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1504 extern int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1506 extern void xfrm_input_init(void);
1507 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1509 extern void xfrm_probe_algs(void);
1510 extern int xfrm_count_auth_supported(void);
1511 extern int xfrm_count_enc_supported(void);
1512 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1513 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1514 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1515 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1516 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1517 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(const char *name
, int probe
);
1518 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(const char *name
, int probe
);
1519 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(const char *name
, int probe
);
1520 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(const char *name
, int icv_len
,
1525 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1528 static inline int xfrm_addr_cmp(const xfrm_address_t
*a
,
1529 const xfrm_address_t
*b
,
1535 return (__force u32
)a
->a4
- (__force u32
)b
->a4
;
1537 return ipv6_addr_cmp((struct in6_addr
*)a
,
1538 (struct in6_addr
*)b
);
1542 static inline int xfrm_policy_id2dir(u32 index
)
1548 static inline int xfrm_aevent_is_on(struct net
*net
)
1554 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1556 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1562 static inline int xfrm_alg_len(const struct xfrm_algo
*alg
)
1564 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1567 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth
*alg
)
1569 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1572 #ifdef CONFIG_XFRM_MIGRATE
1573 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1575 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1578 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1580 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1583 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1586 for (i
= 0; i
< n
; i
++)
1587 xfrm_state_put(*(states
+ i
));
1590 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1593 for (i
= 0; i
< n
; i
++)
1594 xfrm_state_delete(*(states
+ i
));
1599 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1601 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1605 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1607 if (attrs
[XFRMA_MARK
])
1608 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1615 static inline int xfrm_mark_put(struct sk_buff
*skb
, const struct xfrm_mark
*m
)
1618 NLA_PUT(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1625 #endif /* _NET_XFRM_H */