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
);
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
, const struct km_event
*c
);
288 extern void km_state_notify(struct xfrm_state
*x
, const 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
,
304 const struct flowi
*fl
);
305 void (*init_temprop
)(struct xfrm_state
*x
,
306 const struct xfrm_tmpl
*tmpl
,
307 const xfrm_address_t
*daddr
,
308 const xfrm_address_t
*saddr
);
309 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
310 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
311 int (*output
)(struct sk_buff
*skb
);
312 int (*extract_input
)(struct xfrm_state
*x
,
313 struct sk_buff
*skb
);
314 int (*extract_output
)(struct xfrm_state
*x
,
315 struct sk_buff
*skb
);
316 int (*transport_finish
)(struct sk_buff
*skb
,
320 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
321 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
323 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
327 struct module
*owner
;
330 #define XFRM_TYPE_NON_FRAGMENT 1
331 #define XFRM_TYPE_REPLAY_PROT 2
332 #define XFRM_TYPE_LOCAL_COADDR 4
333 #define XFRM_TYPE_REMOTE_COADDR 8
335 int (*init_state
)(struct xfrm_state
*x
);
336 void (*destructor
)(struct xfrm_state
*);
337 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
338 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
339 int (*reject
)(struct xfrm_state
*, struct sk_buff
*,
340 const struct flowi
*);
341 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
342 /* Estimate maximal size of result of transformation of a dgram */
343 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
346 extern int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
347 extern int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
351 * Remove encapsulation header.
353 * The IP header will be moved over the top of the encapsulation
356 * On entry, the transport header shall point to where the IP header
357 * should be and the network header shall be set to where the IP
358 * header currently is. skb->data shall point to the start of the
361 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
364 * This is the actual input entry point.
366 * For transport mode and equivalent this would be identical to
367 * input2 (which does not need to be set). While tunnel mode
368 * and equivalent would set this to the tunnel encapsulation function
369 * xfrm4_prepare_input that would in turn call input2.
371 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
374 * Add encapsulation header.
376 * On exit, the transport header will be set to the start of the
377 * encapsulation header to be filled in by x->type->output and
378 * the mac header will be set to the nextheader (protocol for
379 * IPv4) field of the extension header directly preceding the
380 * encapsulation header, or in its absence, that of the top IP
381 * header. The value of the network header will always point
382 * to the top IP header while skb->data will point to the payload.
384 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
387 * This is the actual output entry point.
389 * For transport mode and equivalent this would be identical to
390 * output2 (which does not need to be set). While tunnel mode
391 * and equivalent would set this to a tunnel encapsulation function
392 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
395 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
397 struct xfrm_state_afinfo
*afinfo
;
398 struct module
*owner
;
403 /* Flags for xfrm_mode. */
405 XFRM_MODE_FLAG_TUNNEL
= 1,
408 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
409 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
411 static inline int xfrm_af2proto(unsigned int family
)
423 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
425 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
426 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
427 return x
->inner_mode
;
429 return x
->inner_mode_iaf
;
433 /* id in template is interpreted as:
434 * daddr - destination of tunnel, may be zero for transport mode.
435 * spi - zero to acquire spi. Not zero if spi is static, then
436 * daddr must be fixed too.
437 * proto - AH/ESP/IPCOMP
441 /* Source address of tunnel. Ignored, if it is not a tunnel. */
442 xfrm_address_t saddr
;
444 unsigned short encap_family
;
448 /* Mode: transport, tunnel etc. */
451 /* Sharing mode: unique, this session only, this user only etc. */
454 /* May skip this transfomration if no SA is found */
457 /* Skip aalgos/ealgos/calgos checks. */
460 /* Bit mask of algos allowed for acquisition */
466 #define XFRM_MAX_DEPTH 6
468 struct xfrm_policy_walk_entry
{
469 struct list_head all
;
473 struct xfrm_policy_walk
{
474 struct xfrm_policy_walk_entry walk
;
483 struct hlist_node bydst
;
484 struct hlist_node byidx
;
486 /* This lock only affects elements except for entry. */
489 struct timer_list timer
;
491 struct flow_cache_object flo
;
495 struct xfrm_mark mark
;
496 struct xfrm_selector selector
;
497 struct xfrm_lifetime_cfg lft
;
498 struct xfrm_lifetime_cur curlft
;
499 struct xfrm_policy_walk_entry walk
;
505 struct xfrm_sec_ctx
*security
;
506 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
509 static inline struct net
*xp_net(const struct xfrm_policy
*xp
)
511 return read_pnet(&xp
->xp_net
);
514 struct xfrm_kmaddress
{
515 xfrm_address_t local
;
516 xfrm_address_t remote
;
521 struct xfrm_migrate
{
522 xfrm_address_t old_daddr
;
523 xfrm_address_t old_saddr
;
524 xfrm_address_t new_daddr
;
525 xfrm_address_t new_saddr
;
534 #define XFRM_KM_TIMEOUT 30
536 #define XFRM_REPLAY_SEQ 1
537 #define XFRM_REPLAY_OSEQ 2
538 #define XFRM_REPLAY_SEQ_MASK 3
540 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
541 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
543 /* default aevent timeout in units of 100ms */
544 #define XFRM_AE_ETIME 10
545 /* Async Event timer multiplier */
546 #define XFRM_AE_ETH_M 10
547 /* default seq threshold size */
548 #define XFRM_AE_SEQT_SIZE 2
551 struct list_head list
;
553 int (*notify
)(struct xfrm_state
*x
, const struct km_event
*c
);
554 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
555 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
556 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
557 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, const struct km_event
*c
);
558 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
559 int (*migrate
)(const struct xfrm_selector
*sel
,
561 const struct xfrm_migrate
*m
,
563 const struct xfrm_kmaddress
*k
);
566 extern int xfrm_register_km(struct xfrm_mgr
*km
);
567 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
570 * This structure is used for the duration where packets are being
571 * transformed by IPsec. As soon as the packet leaves IPsec the
572 * area beyond the generic IP part may be overwritten.
576 struct inet_skb_parm h4
;
577 struct inet6_skb_parm h6
;
580 /* Sequence number for replay protection. */
587 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
590 * This structure is used by the afinfo prepare_input/prepare_output functions
591 * to transmit header information to the mode input/output functions.
593 struct xfrm_mode_skb_cb
{
595 struct inet_skb_parm h4
;
596 struct inet6_skb_parm h6
;
599 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
603 /* IP header length (excluding options or extension headers). */
606 /* TOS for IPv4, class for IPv6. */
609 /* TTL for IPv4, hop limitfor IPv6. */
612 /* Protocol for IPv4, NH for IPv6. */
615 /* Option length for IPv4, zero for IPv6. */
618 /* Used by IPv6 only, zero for IPv4. */
622 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
625 * This structure is used by the input processing to locate the SPI and
626 * related information.
628 struct xfrm_spi_skb_cb
{
630 struct inet_skb_parm h4
;
631 struct inet6_skb_parm h6
;
634 unsigned int daddroff
;
638 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
640 /* Audit Information */
647 #ifdef CONFIG_AUDITSYSCALL
648 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
650 struct audit_buffer
*audit_buf
= NULL
;
652 if (audit_enabled
== 0)
654 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
655 AUDIT_MAC_IPSEC_EVENT
);
656 if (audit_buf
== NULL
)
658 audit_log_format(audit_buf
, "op=%s", op
);
662 static inline void xfrm_audit_helper_usrinfo(uid_t auid
, u32 ses
, u32 secid
,
663 struct audit_buffer
*audit_buf
)
668 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
670 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
671 audit_log_format(audit_buf
, " subj=%s", secctx
);
672 security_release_secctx(secctx
, secctx_len
);
674 audit_log_task_context(audit_buf
);
677 extern void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
678 u32 auid
, u32 ses
, u32 secid
);
679 extern void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
680 u32 auid
, u32 ses
, u32 secid
);
681 extern void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
682 u32 auid
, u32 ses
, u32 secid
);
683 extern void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
684 u32 auid
, u32 ses
, u32 secid
);
685 extern void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
686 struct sk_buff
*skb
);
687 extern void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
688 extern void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
689 __be32 net_spi
, __be32 net_seq
);
690 extern void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
691 struct sk_buff
*skb
, u8 proto
);
694 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
695 u32 auid
, u32 ses
, u32 secid
)
699 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
700 u32 auid
, u32 ses
, u32 secid
)
704 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
705 u32 auid
, u32 ses
, u32 secid
)
709 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
710 u32 auid
, u32 ses
, u32 secid
)
714 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
719 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
724 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
725 __be32 net_spi
, __be32 net_seq
)
729 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
730 struct sk_buff
*skb
, u8 proto
)
733 #endif /* CONFIG_AUDITSYSCALL */
735 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
737 if (likely(policy
!= NULL
))
738 atomic_inc(&policy
->refcnt
);
741 extern void xfrm_policy_destroy(struct xfrm_policy
*policy
);
743 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
745 if (atomic_dec_and_test(&policy
->refcnt
))
746 xfrm_policy_destroy(policy
);
749 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
752 for (i
= npols
- 1; i
>= 0; --i
)
753 xfrm_pol_put(pols
[i
]);
756 extern void __xfrm_state_destroy(struct xfrm_state
*);
758 static inline void __xfrm_state_put(struct xfrm_state
*x
)
760 atomic_dec(&x
->refcnt
);
763 static inline void xfrm_state_put(struct xfrm_state
*x
)
765 if (atomic_dec_and_test(&x
->refcnt
))
766 __xfrm_state_destroy(x
);
769 static inline void xfrm_state_hold(struct xfrm_state
*x
)
771 atomic_inc(&x
->refcnt
);
774 static inline bool addr_match(const void *token1
, const void *token2
,
777 const __be32
*a1
= token1
;
778 const __be32
*a2
= token2
;
782 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
783 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
786 if (memcmp(a1
, a2
, pdw
<< 2))
792 mask
= htonl((0xffffffff) << (32 - pbi
));
794 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
802 __be16
xfrm_flowi_sport(const struct flowi
*fl
)
808 case IPPROTO_UDPLITE
:
810 port
= fl
->fl_ip_sport
;
814 port
= htons(fl
->fl_icmp_type
);
817 port
= htons(fl
->fl_mh_type
);
820 port
= htons(ntohl(fl
->fl_gre_key
) >> 16);
829 __be16
xfrm_flowi_dport(const struct flowi
*fl
)
835 case IPPROTO_UDPLITE
:
837 port
= fl
->fl_ip_dport
;
841 port
= htons(fl
->fl_icmp_code
);
844 port
= htons(ntohl(fl
->fl_gre_key
) & 0xffff);
852 extern int xfrm_selector_match(const struct xfrm_selector
*sel
,
853 const struct flowi
*fl
,
854 unsigned short family
);
856 #ifdef CONFIG_SECURITY_NETWORK_XFRM
857 /* If neither has a context --> match
858 * Otherwise, both must have a context and the sids, doi, alg must match
860 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
862 return ((!s1
&& !s2
) ||
864 (s1
->ctx_sid
== s2
->ctx_sid
) &&
865 (s1
->ctx_doi
== s2
->ctx_doi
) &&
866 (s1
->ctx_alg
== s2
->ctx_alg
)));
869 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
875 /* A struct encoding bundle of transformations to apply to some set of flow.
877 * dst->child points to the next element of bundle.
878 * dst->xfrm points to an instanse of transformer.
880 * Due to unfortunate limitations of current routing cache, which we
881 * have no time to fix, it mirrors struct rtable and bound to the same
882 * routing key, including saddr,daddr. However, we can have many of
883 * bundles differing by session id. All the bundles grow from a parent
888 struct dst_entry dst
;
892 struct dst_entry
*route
;
893 struct flow_cache_object flo
;
894 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
895 int num_pols
, num_xfrms
;
896 #ifdef CONFIG_XFRM_SUB_POLICY
897 struct flowi
*origin
;
898 struct xfrm_selector
*partner
;
902 u32 route_mtu_cached
;
903 u32 child_mtu_cached
;
909 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
911 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
912 dst_release(xdst
->route
);
913 if (likely(xdst
->u
.dst
.xfrm
))
914 xfrm_state_put(xdst
->u
.dst
.xfrm
);
915 #ifdef CONFIG_XFRM_SUB_POLICY
918 kfree(xdst
->partner
);
919 xdst
->partner
= NULL
;
924 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
929 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
932 static inline struct sec_path
*
933 secpath_get(struct sec_path
*sp
)
936 atomic_inc(&sp
->refcnt
);
940 extern void __secpath_destroy(struct sec_path
*sp
);
943 secpath_put(struct sec_path
*sp
)
945 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
946 __secpath_destroy(sp
);
949 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
952 secpath_reset(struct sk_buff
*skb
)
955 secpath_put(skb
->sp
);
961 xfrm_addr_any(const xfrm_address_t
*addr
, unsigned short family
)
965 return addr
->a4
== 0;
967 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
973 __xfrm4_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
975 return (tmpl
->saddr
.a4
&&
976 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
980 __xfrm6_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
982 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
983 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
987 xfrm_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
, unsigned short family
)
991 return __xfrm4_state_addr_cmp(tmpl
, x
);
993 return __xfrm6_state_addr_cmp(tmpl
, x
);
999 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
1001 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
1002 struct sk_buff
*skb
,
1003 unsigned int family
, int reverse
)
1005 struct net
*net
= dev_net(skb
->dev
);
1006 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
1008 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
1009 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1011 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1012 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
1013 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1016 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1018 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1021 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1023 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1026 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1028 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1031 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1032 struct sk_buff
*skb
)
1034 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1037 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1038 struct sk_buff
*skb
)
1040 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1043 extern int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1044 unsigned int family
, int reverse
);
1046 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1047 unsigned int family
)
1049 return __xfrm_decode_session(skb
, fl
, family
, 0);
1052 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1054 unsigned int family
)
1056 return __xfrm_decode_session(skb
, fl
, family
, 1);
1059 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1061 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1063 struct net
*net
= dev_net(skb
->dev
);
1065 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1066 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1067 __xfrm_route_forward(skb
, family
);
1070 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1072 return xfrm_route_forward(skb
, AF_INET
);
1075 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1077 return xfrm_route_forward(skb
, AF_INET6
);
1080 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
1082 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1084 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1085 return __xfrm_sk_clone_policy(sk
);
1089 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1091 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1093 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1094 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1095 sk
->sk_policy
[0] = NULL
;
1097 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1098 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1099 sk
->sk_policy
[1] = NULL
;
1105 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1106 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1107 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1108 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1109 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1113 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1117 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1121 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1123 unsigned int family
)
1127 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1128 struct sk_buff
*skb
)
1132 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1133 struct sk_buff
*skb
)
1140 xfrm_address_t
*xfrm_flowi_daddr(const struct flowi
*fl
, unsigned short family
)
1144 return (xfrm_address_t
*)&fl
->fl4_dst
;
1146 return (xfrm_address_t
*)&fl
->fl6_dst
;
1152 xfrm_address_t
*xfrm_flowi_saddr(const struct flowi
*fl
, unsigned short family
)
1156 return (xfrm_address_t
*)&fl
->fl4_src
;
1158 return (xfrm_address_t
*)&fl
->fl6_src
;
1164 void xfrm_flowi_addr_get(const struct flowi
*fl
,
1165 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1166 unsigned short family
)
1170 memcpy(&saddr
->a4
, &fl
->fl4_src
, sizeof(saddr
->a4
));
1171 memcpy(&daddr
->a4
, &fl
->fl4_dst
, sizeof(daddr
->a4
));
1174 ipv6_addr_copy((struct in6_addr
*)&saddr
->a6
, &fl
->fl6_src
);
1175 ipv6_addr_copy((struct in6_addr
*)&daddr
->a6
, &fl
->fl6_dst
);
1180 static __inline__
int
1181 __xfrm4_state_addr_check(const struct xfrm_state
*x
,
1182 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1184 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1185 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1190 static __inline__
int
1191 __xfrm6_state_addr_check(const struct xfrm_state
*x
,
1192 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1194 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1195 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
1196 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1197 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1202 static __inline__
int
1203 xfrm_state_addr_check(const struct xfrm_state
*x
,
1204 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1205 unsigned short family
)
1209 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1211 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1216 static __inline__
int
1217 xfrm_state_addr_flow_check(const struct xfrm_state
*x
, const struct flowi
*fl
,
1218 unsigned short family
)
1222 return __xfrm4_state_addr_check(x
,
1223 (const xfrm_address_t
*)&fl
->fl4_dst
,
1224 (const xfrm_address_t
*)&fl
->fl4_src
);
1226 return __xfrm6_state_addr_check(x
,
1227 (const xfrm_address_t
*)&fl
->fl6_dst
,
1228 (const xfrm_address_t
*)&fl
->fl6_src
);
1233 static inline int xfrm_state_kern(const struct xfrm_state
*x
)
1235 return atomic_read(&x
->tunnel_users
);
1238 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1240 return (!userproto
|| proto
== userproto
||
1241 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1242 proto
== IPPROTO_ESP
||
1243 proto
== IPPROTO_COMP
)));
1247 * xfrm algorithm information
1249 struct xfrm_algo_aead_info
{
1253 struct xfrm_algo_auth_info
{
1258 struct xfrm_algo_encr_info
{
1263 struct xfrm_algo_comp_info
{
1267 struct xfrm_algo_desc
{
1272 struct xfrm_algo_aead_info aead
;
1273 struct xfrm_algo_auth_info auth
;
1274 struct xfrm_algo_encr_info encr
;
1275 struct xfrm_algo_comp_info comp
;
1277 struct sadb_alg desc
;
1280 /* XFRM tunnel handlers. */
1281 struct xfrm_tunnel
{
1282 int (*handler
)(struct sk_buff
*skb
);
1283 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1285 struct xfrm_tunnel __rcu
*next
;
1289 struct xfrm6_tunnel
{
1290 int (*handler
)(struct sk_buff
*skb
);
1291 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1292 u8 type
, u8 code
, int offset
, __be32 info
);
1293 struct xfrm6_tunnel __rcu
*next
;
1297 extern void xfrm_init(void);
1298 extern void xfrm4_init(int rt_hash_size
);
1299 extern int xfrm_state_init(struct net
*net
);
1300 extern void xfrm_state_fini(struct net
*net
);
1301 extern void xfrm4_state_init(void);
1303 extern int xfrm6_init(void);
1304 extern void xfrm6_fini(void);
1305 extern int xfrm6_state_init(void);
1306 extern void xfrm6_state_fini(void);
1308 static inline int xfrm6_init(void)
1312 static inline void xfrm6_fini(void)
1318 #ifdef CONFIG_XFRM_STATISTICS
1319 extern int xfrm_proc_init(struct net
*net
);
1320 extern void xfrm_proc_fini(struct net
*net
);
1323 extern int xfrm_sysctl_init(struct net
*net
);
1324 #ifdef CONFIG_SYSCTL
1325 extern void xfrm_sysctl_fini(struct net
*net
);
1327 static inline void xfrm_sysctl_fini(struct net
*net
)
1332 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1333 extern int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1334 int (*func
)(struct xfrm_state
*, int, void*), void *);
1335 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1336 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1337 extern struct xfrm_state
*xfrm_state_find(xfrm_address_t
*daddr
,
1338 xfrm_address_t
*saddr
,
1339 const struct flowi
*fl
,
1340 struct xfrm_tmpl
*tmpl
,
1341 struct xfrm_policy
*pol
, int *err
,
1342 unsigned short family
);
1343 extern struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1344 xfrm_address_t
*daddr
,
1345 xfrm_address_t
*saddr
,
1346 unsigned short family
,
1347 u8 mode
, u8 proto
, u32 reqid
);
1348 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1349 extern void xfrm_state_insert(struct xfrm_state
*x
);
1350 extern int xfrm_state_add(struct xfrm_state
*x
);
1351 extern int xfrm_state_update(struct xfrm_state
*x
);
1352 extern struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1353 xfrm_address_t
*daddr
, __be32 spi
,
1354 u8 proto
, unsigned short family
);
1355 extern struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1356 xfrm_address_t
*daddr
,
1357 xfrm_address_t
*saddr
,
1359 unsigned short family
);
1360 #ifdef CONFIG_XFRM_SUB_POLICY
1361 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1362 int n
, unsigned short family
);
1363 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1364 int n
, unsigned short family
);
1366 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1367 int n
, unsigned short family
)
1372 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1373 int n
, unsigned short family
)
1379 struct xfrmk_sadinfo
{
1380 u32 sadhcnt
; /* current hash bkts */
1381 u32 sadhmcnt
; /* max allowed hash bkts */
1382 u32 sadcnt
; /* current running count */
1385 struct xfrmk_spdinfo
{
1396 extern struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
,
1398 extern int xfrm_state_delete(struct xfrm_state
*x
);
1399 extern int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1400 extern void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1401 extern void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1402 extern int xfrm_replay_check(struct xfrm_state
*x
,
1403 struct sk_buff
*skb
, __be32 seq
);
1404 extern void xfrm_replay_advance(struct xfrm_state
*x
, __be32 seq
);
1405 extern void xfrm_replay_notify(struct xfrm_state
*x
, int event
);
1406 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1407 extern int xfrm_init_state(struct xfrm_state
*x
);
1408 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1409 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1411 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1412 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1413 extern int xfrm_output(struct sk_buff
*skb
);
1414 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1415 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1416 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1417 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1419 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1420 extern int xfrm4_rcv(struct sk_buff
*skb
);
1422 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1424 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1427 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1428 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1429 extern int xfrm4_output(struct sk_buff
*skb
);
1430 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1431 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1432 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1433 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1434 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1435 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1436 extern int xfrm6_rcv(struct sk_buff
*skb
);
1437 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1438 xfrm_address_t
*saddr
, u8 proto
);
1439 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1440 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1441 extern __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1442 extern __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, xfrm_address_t
*saddr
);
1443 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1444 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1445 extern int xfrm6_output(struct sk_buff
*skb
);
1446 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1450 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1451 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1453 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1455 return -ENOPROTOOPT
;
1458 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1460 /* should not happen */
1466 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1468 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1469 extern int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1470 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1471 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1472 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1473 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1475 struct xfrm_selector
*sel
,
1476 struct xfrm_sec_ctx
*ctx
, int delete,
1478 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
, u32 id
, int delete, int *err
);
1479 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1480 u32
xfrm_get_acqseq(void);
1481 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1482 struct xfrm_state
*xfrm_find_acq(struct net
*net
, struct xfrm_mark
*mark
,
1483 u8 mode
, u32 reqid
, u8 proto
,
1484 xfrm_address_t
*daddr
,
1485 xfrm_address_t
*saddr
, int create
,
1486 unsigned short family
);
1487 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1489 #ifdef CONFIG_XFRM_MIGRATE
1490 extern int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1491 const struct xfrm_migrate
*m
, int num_bundles
,
1492 const struct xfrm_kmaddress
*k
);
1493 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1494 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1495 struct xfrm_migrate
*m
);
1496 extern int xfrm_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1497 struct xfrm_migrate
*m
, int num_bundles
,
1498 struct xfrm_kmaddress
*k
);
1501 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1502 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1503 extern int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1505 extern void xfrm_input_init(void);
1506 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1508 extern void xfrm_probe_algs(void);
1509 extern int xfrm_count_auth_supported(void);
1510 extern int xfrm_count_enc_supported(void);
1511 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1512 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1513 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1514 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1515 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1516 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(char *name
, int probe
);
1517 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(char *name
, int probe
);
1518 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(char *name
, int probe
);
1519 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(char *name
, int icv_len
,
1524 typedef int (icv_update_fn_t
)(struct hash_desc
*, struct scatterlist
*,
1527 static inline int xfrm_addr_cmp(const xfrm_address_t
*a
,
1528 const xfrm_address_t
*b
,
1534 return (__force u32
)a
->a4
- (__force u32
)b
->a4
;
1536 return ipv6_addr_cmp((struct in6_addr
*)a
,
1537 (struct in6_addr
*)b
);
1541 static inline int xfrm_policy_id2dir(u32 index
)
1547 static inline int xfrm_aevent_is_on(struct net
*net
)
1553 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1555 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1561 static inline int xfrm_alg_len(struct xfrm_algo
*alg
)
1563 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1566 static inline int xfrm_alg_auth_len(struct xfrm_algo_auth
*alg
)
1568 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1571 #ifdef CONFIG_XFRM_MIGRATE
1572 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1574 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1577 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1579 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1582 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1585 for (i
= 0; i
< n
; i
++)
1586 xfrm_state_put(*(states
+ i
));
1589 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1592 for (i
= 0; i
< n
; i
++)
1593 xfrm_state_delete(*(states
+ i
));
1598 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1600 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1604 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1606 if (attrs
[XFRMA_MARK
])
1607 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1614 static inline int xfrm_mark_put(struct sk_buff
*skb
, struct xfrm_mark
*m
)
1617 NLA_PUT(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1624 #endif /* _NET_XFRM_H */