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
;
189 struct xfrm_replay_state_esn
*replay_esn
;
191 /* Replay detection state at the time we sent the last notification */
192 struct xfrm_replay_state preplay
;
193 struct xfrm_replay_state_esn
*preplay_esn
;
195 /* The functions for replay detection. */
196 struct xfrm_replay
*repl
;
198 /* internal flag that only holds state for delayed aevent at the
203 /* Replay detection notification settings */
207 /* Replay detection notification timer */
208 struct timer_list rtimer
;
211 struct xfrm_stats stats
;
213 struct xfrm_lifetime_cur curlft
;
214 struct tasklet_hrtimer mtimer
;
217 unsigned long lastused
;
219 /* Reference to data common to all the instances of this
221 const struct xfrm_type
*type
;
222 struct xfrm_mode
*inner_mode
;
223 struct xfrm_mode
*inner_mode_iaf
;
224 struct xfrm_mode
*outer_mode
;
226 /* Security context */
227 struct xfrm_sec_ctx
*security
;
229 /* Private data of this transformer, format is opaque,
230 * interpreted by xfrm_type methods. */
234 static inline struct net
*xs_net(struct xfrm_state
*x
)
236 return read_pnet(&x
->xs_net
);
239 /* xflags - make enum if more show up */
240 #define XFRM_TIME_DEFER 1
251 /* callback structure passed from either netlink or pfkey */
268 void (*advance
)(struct xfrm_state
*x
, __be32 net_seq
);
269 int (*check
)(struct xfrm_state
*x
,
272 int (*recheck
)(struct xfrm_state
*x
,
275 void (*notify
)(struct xfrm_state
*x
, int event
);
276 int (*overflow
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
282 struct xfrm_policy_afinfo
{
283 unsigned short family
;
284 struct dst_ops
*dst_ops
;
285 void (*garbage_collect
)(struct net
*net
);
286 struct dst_entry
*(*dst_lookup
)(struct net
*net
, int tos
,
287 const xfrm_address_t
*saddr
,
288 const xfrm_address_t
*daddr
);
289 int (*get_saddr
)(struct net
*net
, xfrm_address_t
*saddr
, xfrm_address_t
*daddr
);
290 void (*decode_session
)(struct sk_buff
*skb
,
293 int (*get_tos
)(const struct flowi
*fl
);
294 int (*init_path
)(struct xfrm_dst
*path
,
295 struct dst_entry
*dst
,
297 int (*fill_dst
)(struct xfrm_dst
*xdst
,
298 struct net_device
*dev
,
299 const struct flowi
*fl
);
300 struct dst_entry
*(*blackhole_route
)(struct net
*net
, struct dst_entry
*orig
);
303 extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo
*afinfo
);
304 extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo
*afinfo
);
305 extern void km_policy_notify(struct xfrm_policy
*xp
, int dir
, const struct km_event
*c
);
306 extern void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
);
309 extern int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
, struct xfrm_policy
*pol
);
310 extern void km_state_expired(struct xfrm_state
*x
, int hard
, u32 pid
);
311 extern int __xfrm_state_delete(struct xfrm_state
*x
);
313 struct xfrm_state_afinfo
{
317 struct module
*owner
;
318 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
319 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
320 int (*init_flags
)(struct xfrm_state
*x
);
321 void (*init_tempsel
)(struct xfrm_selector
*sel
,
322 const struct flowi
*fl
);
323 void (*init_temprop
)(struct xfrm_state
*x
,
324 const struct xfrm_tmpl
*tmpl
,
325 const xfrm_address_t
*daddr
,
326 const xfrm_address_t
*saddr
);
327 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
328 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
329 int (*output
)(struct sk_buff
*skb
);
330 int (*output_finish
)(struct sk_buff
*skb
);
331 int (*extract_input
)(struct xfrm_state
*x
,
332 struct sk_buff
*skb
);
333 int (*extract_output
)(struct xfrm_state
*x
,
334 struct sk_buff
*skb
);
335 int (*transport_finish
)(struct sk_buff
*skb
,
339 extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
340 extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
342 extern void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
346 struct module
*owner
;
349 #define XFRM_TYPE_NON_FRAGMENT 1
350 #define XFRM_TYPE_REPLAY_PROT 2
351 #define XFRM_TYPE_LOCAL_COADDR 4
352 #define XFRM_TYPE_REMOTE_COADDR 8
354 int (*init_state
)(struct xfrm_state
*x
);
355 void (*destructor
)(struct xfrm_state
*);
356 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
357 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
358 int (*reject
)(struct xfrm_state
*, struct sk_buff
*,
359 const struct flowi
*);
360 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
361 /* Estimate maximal size of result of transformation of a dgram */
362 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
365 extern int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
366 extern int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
370 * Remove encapsulation header.
372 * The IP header will be moved over the top of the encapsulation
375 * On entry, the transport header shall point to where the IP header
376 * should be and the network header shall be set to where the IP
377 * header currently is. skb->data shall point to the start of the
380 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
383 * This is the actual input entry point.
385 * For transport mode and equivalent this would be identical to
386 * input2 (which does not need to be set). While tunnel mode
387 * and equivalent would set this to the tunnel encapsulation function
388 * xfrm4_prepare_input that would in turn call input2.
390 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
393 * Add encapsulation header.
395 * On exit, the transport header will be set to the start of the
396 * encapsulation header to be filled in by x->type->output and
397 * the mac header will be set to the nextheader (protocol for
398 * IPv4) field of the extension header directly preceding the
399 * encapsulation header, or in its absence, that of the top IP
400 * header. The value of the network header will always point
401 * to the top IP header while skb->data will point to the payload.
403 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
406 * This is the actual output entry point.
408 * For transport mode and equivalent this would be identical to
409 * output2 (which does not need to be set). While tunnel mode
410 * and equivalent would set this to a tunnel encapsulation function
411 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
414 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
416 struct xfrm_state_afinfo
*afinfo
;
417 struct module
*owner
;
422 /* Flags for xfrm_mode. */
424 XFRM_MODE_FLAG_TUNNEL
= 1,
427 extern int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
428 extern int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
430 static inline int xfrm_af2proto(unsigned int family
)
442 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
444 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
445 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
446 return x
->inner_mode
;
448 return x
->inner_mode_iaf
;
452 /* id in template is interpreted as:
453 * daddr - destination of tunnel, may be zero for transport mode.
454 * spi - zero to acquire spi. Not zero if spi is static, then
455 * daddr must be fixed too.
456 * proto - AH/ESP/IPCOMP
460 /* Source address of tunnel. Ignored, if it is not a tunnel. */
461 xfrm_address_t saddr
;
463 unsigned short encap_family
;
467 /* Mode: transport, tunnel etc. */
470 /* Sharing mode: unique, this session only, this user only etc. */
473 /* May skip this transfomration if no SA is found */
476 /* Skip aalgos/ealgos/calgos checks. */
479 /* Bit mask of algos allowed for acquisition */
485 #define XFRM_MAX_DEPTH 6
487 struct xfrm_policy_walk_entry
{
488 struct list_head all
;
492 struct xfrm_policy_walk
{
493 struct xfrm_policy_walk_entry walk
;
502 struct hlist_node bydst
;
503 struct hlist_node byidx
;
505 /* This lock only affects elements except for entry. */
508 struct timer_list timer
;
510 struct flow_cache_object flo
;
514 struct xfrm_mark mark
;
515 struct xfrm_selector selector
;
516 struct xfrm_lifetime_cfg lft
;
517 struct xfrm_lifetime_cur curlft
;
518 struct xfrm_policy_walk_entry walk
;
524 struct xfrm_sec_ctx
*security
;
525 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
528 static inline struct net
*xp_net(const struct xfrm_policy
*xp
)
530 return read_pnet(&xp
->xp_net
);
533 struct xfrm_kmaddress
{
534 xfrm_address_t local
;
535 xfrm_address_t remote
;
540 struct xfrm_migrate
{
541 xfrm_address_t old_daddr
;
542 xfrm_address_t old_saddr
;
543 xfrm_address_t new_daddr
;
544 xfrm_address_t new_saddr
;
553 #define XFRM_KM_TIMEOUT 30
555 #define XFRM_REPLAY_SEQ 1
556 #define XFRM_REPLAY_OSEQ 2
557 #define XFRM_REPLAY_SEQ_MASK 3
559 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
560 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
562 /* default aevent timeout in units of 100ms */
563 #define XFRM_AE_ETIME 10
564 /* Async Event timer multiplier */
565 #define XFRM_AE_ETH_M 10
566 /* default seq threshold size */
567 #define XFRM_AE_SEQT_SIZE 2
570 struct list_head list
;
572 int (*notify
)(struct xfrm_state
*x
, const struct km_event
*c
);
573 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
, int dir
);
574 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
575 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
576 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, const struct km_event
*c
);
577 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
578 int (*migrate
)(const struct xfrm_selector
*sel
,
580 const struct xfrm_migrate
*m
,
582 const struct xfrm_kmaddress
*k
);
585 extern int xfrm_register_km(struct xfrm_mgr
*km
);
586 extern int xfrm_unregister_km(struct xfrm_mgr
*km
);
589 * This structure is used for the duration where packets are being
590 * transformed by IPsec. As soon as the packet leaves IPsec the
591 * area beyond the generic IP part may be overwritten.
595 struct inet_skb_parm h4
;
596 struct inet6_skb_parm h6
;
599 /* Sequence number for replay protection. */
612 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
615 * This structure is used by the afinfo prepare_input/prepare_output functions
616 * to transmit header information to the mode input/output functions.
618 struct xfrm_mode_skb_cb
{
620 struct inet_skb_parm h4
;
621 struct inet6_skb_parm h6
;
624 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
628 /* IP header length (excluding options or extension headers). */
631 /* TOS for IPv4, class for IPv6. */
634 /* TTL for IPv4, hop limitfor IPv6. */
637 /* Protocol for IPv4, NH for IPv6. */
640 /* Option length for IPv4, zero for IPv6. */
643 /* Used by IPv6 only, zero for IPv4. */
647 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
650 * This structure is used by the input processing to locate the SPI and
651 * related information.
653 struct xfrm_spi_skb_cb
{
655 struct inet_skb_parm h4
;
656 struct inet6_skb_parm h6
;
659 unsigned int daddroff
;
663 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
665 /* Audit Information */
672 #ifdef CONFIG_AUDITSYSCALL
673 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
675 struct audit_buffer
*audit_buf
= NULL
;
677 if (audit_enabled
== 0)
679 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
680 AUDIT_MAC_IPSEC_EVENT
);
681 if (audit_buf
== NULL
)
683 audit_log_format(audit_buf
, "op=%s", op
);
687 static inline void xfrm_audit_helper_usrinfo(uid_t auid
, u32 ses
, u32 secid
,
688 struct audit_buffer
*audit_buf
)
693 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
695 security_secid_to_secctx(secid
, &secctx
, &secctx_len
) == 0) {
696 audit_log_format(audit_buf
, " subj=%s", secctx
);
697 security_release_secctx(secctx
, secctx_len
);
699 audit_log_task_context(audit_buf
);
702 extern void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
703 u32 auid
, u32 ses
, u32 secid
);
704 extern void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
705 u32 auid
, u32 ses
, u32 secid
);
706 extern void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
707 u32 auid
, u32 ses
, u32 secid
);
708 extern void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
709 u32 auid
, u32 ses
, u32 secid
);
710 extern void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
711 struct sk_buff
*skb
);
712 extern void xfrm_audit_state_replay(struct xfrm_state
*x
,
713 struct sk_buff
*skb
, __be32 net_seq
);
714 extern void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
715 extern void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
716 __be32 net_spi
, __be32 net_seq
);
717 extern void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
718 struct sk_buff
*skb
, u8 proto
);
721 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
722 u32 auid
, u32 ses
, u32 secid
)
726 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
727 u32 auid
, u32 ses
, u32 secid
)
731 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
732 u32 auid
, u32 ses
, u32 secid
)
736 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
737 u32 auid
, u32 ses
, u32 secid
)
741 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
746 static inline void xfrm_audit_state_replay(struct xfrm_state
*x
,
747 struct sk_buff
*skb
, __be32 net_seq
)
751 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
756 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
757 __be32 net_spi
, __be32 net_seq
)
761 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
762 struct sk_buff
*skb
, u8 proto
)
765 #endif /* CONFIG_AUDITSYSCALL */
767 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
769 if (likely(policy
!= NULL
))
770 atomic_inc(&policy
->refcnt
);
773 extern void xfrm_policy_destroy(struct xfrm_policy
*policy
);
775 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
777 if (atomic_dec_and_test(&policy
->refcnt
))
778 xfrm_policy_destroy(policy
);
781 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
784 for (i
= npols
- 1; i
>= 0; --i
)
785 xfrm_pol_put(pols
[i
]);
788 extern void __xfrm_state_destroy(struct xfrm_state
*);
790 static inline void __xfrm_state_put(struct xfrm_state
*x
)
792 atomic_dec(&x
->refcnt
);
795 static inline void xfrm_state_put(struct xfrm_state
*x
)
797 if (atomic_dec_and_test(&x
->refcnt
))
798 __xfrm_state_destroy(x
);
801 static inline void xfrm_state_hold(struct xfrm_state
*x
)
803 atomic_inc(&x
->refcnt
);
806 static inline bool addr_match(const void *token1
, const void *token2
,
809 const __be32
*a1
= token1
;
810 const __be32
*a2
= token2
;
814 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
815 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
818 if (memcmp(a1
, a2
, pdw
<< 2))
824 mask
= htonl((0xffffffff) << (32 - pbi
));
826 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
833 static inline bool addr4_match(__be32 a1
, __be32 a2
, u8 prefixlen
)
835 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
838 return !((a1
^ a2
) & htonl(0xFFFFFFFFu
<< (32 - prefixlen
)));
842 __be16
xfrm_flowi_sport(const struct flowi
*fl
, const union flowi_uli
*uli
)
845 switch(fl
->flowi_proto
) {
848 case IPPROTO_UDPLITE
:
850 port
= uli
->ports
.sport
;
854 port
= htons(uli
->icmpt
.type
);
857 port
= htons(uli
->mht
.type
);
860 port
= htons(ntohl(uli
->gre_key
) >> 16);
869 __be16
xfrm_flowi_dport(const struct flowi
*fl
, const union flowi_uli
*uli
)
872 switch(fl
->flowi_proto
) {
875 case IPPROTO_UDPLITE
:
877 port
= uli
->ports
.dport
;
881 port
= htons(uli
->icmpt
.code
);
884 port
= htons(ntohl(uli
->gre_key
) & 0xffff);
892 extern int xfrm_selector_match(const struct xfrm_selector
*sel
,
893 const struct flowi
*fl
,
894 unsigned short family
);
896 #ifdef CONFIG_SECURITY_NETWORK_XFRM
897 /* If neither has a context --> match
898 * Otherwise, both must have a context and the sids, doi, alg must match
900 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
902 return ((!s1
&& !s2
) ||
904 (s1
->ctx_sid
== s2
->ctx_sid
) &&
905 (s1
->ctx_doi
== s2
->ctx_doi
) &&
906 (s1
->ctx_alg
== s2
->ctx_alg
)));
909 static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
915 /* A struct encoding bundle of transformations to apply to some set of flow.
917 * dst->child points to the next element of bundle.
918 * dst->xfrm points to an instanse of transformer.
920 * Due to unfortunate limitations of current routing cache, which we
921 * have no time to fix, it mirrors struct rtable and bound to the same
922 * routing key, including saddr,daddr. However, we can have many of
923 * bundles differing by session id. All the bundles grow from a parent
928 struct dst_entry dst
;
932 struct dst_entry
*route
;
933 struct flow_cache_object flo
;
934 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
935 int num_pols
, num_xfrms
;
936 #ifdef CONFIG_XFRM_SUB_POLICY
937 struct flowi
*origin
;
938 struct xfrm_selector
*partner
;
942 u32 route_mtu_cached
;
943 u32 child_mtu_cached
;
949 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
951 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
952 dst_release(xdst
->route
);
953 if (likely(xdst
->u
.dst
.xfrm
))
954 xfrm_state_put(xdst
->u
.dst
.xfrm
);
955 #ifdef CONFIG_XFRM_SUB_POLICY
958 kfree(xdst
->partner
);
959 xdst
->partner
= NULL
;
964 extern void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
969 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
972 static inline int secpath_exists(struct sk_buff
*skb
)
975 return skb
->sp
!= NULL
;
981 static inline struct sec_path
*
982 secpath_get(struct sec_path
*sp
)
985 atomic_inc(&sp
->refcnt
);
989 extern void __secpath_destroy(struct sec_path
*sp
);
992 secpath_put(struct sec_path
*sp
)
994 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
995 __secpath_destroy(sp
);
998 extern struct sec_path
*secpath_dup(struct sec_path
*src
);
1001 secpath_reset(struct sk_buff
*skb
)
1004 secpath_put(skb
->sp
);
1010 xfrm_addr_any(const xfrm_address_t
*addr
, unsigned short family
)
1014 return addr
->a4
== 0;
1016 return ipv6_addr_any((struct in6_addr
*)&addr
->a6
);
1022 __xfrm4_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1024 return (tmpl
->saddr
.a4
&&
1025 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
1029 __xfrm6_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1031 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
1032 ipv6_addr_cmp((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
1036 xfrm_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
, unsigned short family
)
1040 return __xfrm4_state_addr_cmp(tmpl
, x
);
1042 return __xfrm6_state_addr_cmp(tmpl
, x
);
1048 extern int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
, unsigned short family
);
1050 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
1051 struct sk_buff
*skb
,
1052 unsigned int family
, int reverse
)
1054 struct net
*net
= dev_net(skb
->dev
);
1055 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
1057 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
1058 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1060 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1061 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
1062 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1065 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1067 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1070 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1072 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1075 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1077 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1080 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1081 struct sk_buff
*skb
)
1083 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1086 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1087 struct sk_buff
*skb
)
1089 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1092 extern int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1093 unsigned int family
, int reverse
);
1095 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1096 unsigned int family
)
1098 return __xfrm_decode_session(skb
, fl
, family
, 0);
1101 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1103 unsigned int family
)
1105 return __xfrm_decode_session(skb
, fl
, family
, 1);
1108 extern int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1110 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1112 struct net
*net
= dev_net(skb
->dev
);
1114 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1115 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1116 __xfrm_route_forward(skb
, family
);
1119 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1121 return xfrm_route_forward(skb
, AF_INET
);
1124 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1126 return xfrm_route_forward(skb
, AF_INET6
);
1129 extern int __xfrm_sk_clone_policy(struct sock
*sk
);
1131 static inline int xfrm_sk_clone_policy(struct sock
*sk
)
1133 if (unlikely(sk
->sk_policy
[0] || sk
->sk_policy
[1]))
1134 return __xfrm_sk_clone_policy(sk
);
1138 extern int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1140 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1142 if (unlikely(sk
->sk_policy
[0] != NULL
)) {
1143 xfrm_policy_delete(sk
->sk_policy
[0], XFRM_POLICY_MAX
);
1144 sk
->sk_policy
[0] = NULL
;
1146 if (unlikely(sk
->sk_policy
[1] != NULL
)) {
1147 xfrm_policy_delete(sk
->sk_policy
[1], XFRM_POLICY_MAX
+1);
1148 sk
->sk_policy
[1] = NULL
;
1154 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1155 static inline int xfrm_sk_clone_policy(struct sock
*sk
) { return 0; }
1156 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1157 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1158 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1162 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1166 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1170 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1172 unsigned int family
)
1176 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1177 struct sk_buff
*skb
)
1181 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1182 struct sk_buff
*skb
)
1189 xfrm_address_t
*xfrm_flowi_daddr(const struct flowi
*fl
, unsigned short family
)
1193 return (xfrm_address_t
*)&fl
->u
.ip4
.daddr
;
1195 return (xfrm_address_t
*)&fl
->u
.ip6
.daddr
;
1201 xfrm_address_t
*xfrm_flowi_saddr(const struct flowi
*fl
, unsigned short family
)
1205 return (xfrm_address_t
*)&fl
->u
.ip4
.saddr
;
1207 return (xfrm_address_t
*)&fl
->u
.ip6
.saddr
;
1213 void xfrm_flowi_addr_get(const struct flowi
*fl
,
1214 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1215 unsigned short family
)
1219 memcpy(&saddr
->a4
, &fl
->u
.ip4
.saddr
, sizeof(saddr
->a4
));
1220 memcpy(&daddr
->a4
, &fl
->u
.ip4
.daddr
, sizeof(daddr
->a4
));
1223 *(struct in6_addr
*)saddr
->a6
= fl
->u
.ip6
.saddr
;
1224 *(struct in6_addr
*)daddr
->a6
= fl
->u
.ip6
.daddr
;
1229 static __inline__
int
1230 __xfrm4_state_addr_check(const struct xfrm_state
*x
,
1231 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1233 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1234 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1239 static __inline__
int
1240 __xfrm6_state_addr_check(const struct xfrm_state
*x
,
1241 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1243 if (!ipv6_addr_cmp((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1244 (!ipv6_addr_cmp((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
)||
1245 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1246 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1251 static __inline__
int
1252 xfrm_state_addr_check(const struct xfrm_state
*x
,
1253 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1254 unsigned short family
)
1258 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1260 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1265 static __inline__
int
1266 xfrm_state_addr_flow_check(const struct xfrm_state
*x
, const struct flowi
*fl
,
1267 unsigned short family
)
1271 return __xfrm4_state_addr_check(x
,
1272 (const xfrm_address_t
*)&fl
->u
.ip4
.daddr
,
1273 (const xfrm_address_t
*)&fl
->u
.ip4
.saddr
);
1275 return __xfrm6_state_addr_check(x
,
1276 (const xfrm_address_t
*)&fl
->u
.ip6
.daddr
,
1277 (const xfrm_address_t
*)&fl
->u
.ip6
.saddr
);
1282 static inline int xfrm_state_kern(const struct xfrm_state
*x
)
1284 return atomic_read(&x
->tunnel_users
);
1287 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1289 return (!userproto
|| proto
== userproto
||
1290 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1291 proto
== IPPROTO_ESP
||
1292 proto
== IPPROTO_COMP
)));
1296 * xfrm algorithm information
1298 struct xfrm_algo_aead_info
{
1302 struct xfrm_algo_auth_info
{
1307 struct xfrm_algo_encr_info
{
1312 struct xfrm_algo_comp_info
{
1316 struct xfrm_algo_desc
{
1321 struct xfrm_algo_aead_info aead
;
1322 struct xfrm_algo_auth_info auth
;
1323 struct xfrm_algo_encr_info encr
;
1324 struct xfrm_algo_comp_info comp
;
1326 struct sadb_alg desc
;
1329 /* XFRM tunnel handlers. */
1330 struct xfrm_tunnel
{
1331 int (*handler
)(struct sk_buff
*skb
);
1332 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1334 struct xfrm_tunnel __rcu
*next
;
1338 struct xfrm6_tunnel
{
1339 int (*handler
)(struct sk_buff
*skb
);
1340 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1341 u8 type
, u8 code
, int offset
, __be32 info
);
1342 struct xfrm6_tunnel __rcu
*next
;
1346 extern void xfrm_init(void);
1347 extern void xfrm4_init(int rt_hash_size
);
1348 extern int xfrm_state_init(struct net
*net
);
1349 extern void xfrm_state_fini(struct net
*net
);
1350 extern void xfrm4_state_init(void);
1352 extern int xfrm6_init(void);
1353 extern void xfrm6_fini(void);
1354 extern int xfrm6_state_init(void);
1355 extern void xfrm6_state_fini(void);
1357 static inline int xfrm6_init(void)
1361 static inline void xfrm6_fini(void)
1367 #ifdef CONFIG_XFRM_STATISTICS
1368 extern int xfrm_proc_init(struct net
*net
);
1369 extern void xfrm_proc_fini(struct net
*net
);
1372 extern int xfrm_sysctl_init(struct net
*net
);
1373 #ifdef CONFIG_SYSCTL
1374 extern void xfrm_sysctl_fini(struct net
*net
);
1376 static inline void xfrm_sysctl_fini(struct net
*net
)
1381 extern void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
);
1382 extern int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1383 int (*func
)(struct xfrm_state
*, int, void*), void *);
1384 extern void xfrm_state_walk_done(struct xfrm_state_walk
*walk
);
1385 extern struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1386 extern struct xfrm_state
*xfrm_state_find(const xfrm_address_t
*daddr
,
1387 const xfrm_address_t
*saddr
,
1388 const struct flowi
*fl
,
1389 struct xfrm_tmpl
*tmpl
,
1390 struct xfrm_policy
*pol
, int *err
,
1391 unsigned short family
);
1392 extern struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1393 xfrm_address_t
*daddr
,
1394 xfrm_address_t
*saddr
,
1395 unsigned short family
,
1396 u8 mode
, u8 proto
, u32 reqid
);
1397 extern int xfrm_state_check_expire(struct xfrm_state
*x
);
1398 extern void xfrm_state_insert(struct xfrm_state
*x
);
1399 extern int xfrm_state_add(struct xfrm_state
*x
);
1400 extern int xfrm_state_update(struct xfrm_state
*x
);
1401 extern struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1402 const xfrm_address_t
*daddr
, __be32 spi
,
1403 u8 proto
, unsigned short family
);
1404 extern struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1405 const xfrm_address_t
*daddr
,
1406 const xfrm_address_t
*saddr
,
1408 unsigned short family
);
1409 #ifdef CONFIG_XFRM_SUB_POLICY
1410 extern int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1411 int n
, unsigned short family
);
1412 extern int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1413 int n
, unsigned short family
);
1415 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1416 int n
, unsigned short family
)
1421 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1422 int n
, unsigned short family
)
1428 struct xfrmk_sadinfo
{
1429 u32 sadhcnt
; /* current hash bkts */
1430 u32 sadhmcnt
; /* max allowed hash bkts */
1431 u32 sadcnt
; /* current running count */
1434 struct xfrmk_spdinfo
{
1445 extern struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
,
1447 extern int xfrm_state_delete(struct xfrm_state
*x
);
1448 extern int xfrm_state_flush(struct net
*net
, u8 proto
, struct xfrm_audit
*audit_info
);
1449 extern void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1450 extern void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1451 extern u32
xfrm_replay_seqhi(struct xfrm_state
*x
, __be32 net_seq
);
1452 extern int xfrm_init_replay(struct xfrm_state
*x
);
1453 extern int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1454 extern int __xfrm_init_state(struct xfrm_state
*x
, bool init_replay
);
1455 extern int xfrm_init_state(struct xfrm_state
*x
);
1456 extern int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1457 extern int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1459 extern int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1460 extern int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1461 extern int xfrm_output(struct sk_buff
*skb
);
1462 extern int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1463 extern int xfrm4_extract_header(struct sk_buff
*skb
);
1464 extern int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1465 extern int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1467 extern int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1468 extern int xfrm4_rcv(struct sk_buff
*skb
);
1470 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1472 return xfrm4_rcv_encap(skb
, nexthdr
, spi
, 0);
1475 extern int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1476 extern int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1477 extern int xfrm4_output(struct sk_buff
*skb
);
1478 extern int xfrm4_output_finish(struct sk_buff
*skb
);
1479 extern int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1480 extern int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1481 extern int xfrm6_extract_header(struct sk_buff
*skb
);
1482 extern int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1483 extern int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
);
1484 extern int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1485 extern int xfrm6_rcv(struct sk_buff
*skb
);
1486 extern int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1487 xfrm_address_t
*saddr
, u8 proto
);
1488 extern int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1489 extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1490 extern __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1491 extern __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, const xfrm_address_t
*saddr
);
1492 extern int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1493 extern int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1494 extern int xfrm6_output(struct sk_buff
*skb
);
1495 extern int xfrm6_output_finish(struct sk_buff
*skb
);
1496 extern int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1500 extern int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1501 extern int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
);
1503 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1505 return -ENOPROTOOPT
;
1508 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1510 /* should not happen */
1516 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1518 extern void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1519 extern int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1520 int (*func
)(struct xfrm_policy
*, int, int, void*), void *);
1521 extern void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
);
1522 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1523 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1525 struct xfrm_selector
*sel
,
1526 struct xfrm_sec_ctx
*ctx
, int delete,
1528 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
, u32 id
, int delete, int *err
);
1529 int xfrm_policy_flush(struct net
*net
, u8 type
, struct xfrm_audit
*audit_info
);
1530 u32
xfrm_get_acqseq(void);
1531 extern int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1532 struct xfrm_state
*xfrm_find_acq(struct net
*net
, struct xfrm_mark
*mark
,
1533 u8 mode
, u32 reqid
, u8 proto
,
1534 const xfrm_address_t
*daddr
,
1535 const xfrm_address_t
*saddr
, int create
,
1536 unsigned short family
);
1537 extern int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1539 #ifdef CONFIG_XFRM_MIGRATE
1540 extern int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1541 const struct xfrm_migrate
*m
, int num_bundles
,
1542 const struct xfrm_kmaddress
*k
);
1543 extern struct xfrm_state
* xfrm_migrate_state_find(struct xfrm_migrate
*m
);
1544 extern struct xfrm_state
* xfrm_state_migrate(struct xfrm_state
*x
,
1545 struct xfrm_migrate
*m
);
1546 extern int xfrm_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1547 struct xfrm_migrate
*m
, int num_bundles
,
1548 struct xfrm_kmaddress
*k
);
1551 extern int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1552 extern void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 pid
);
1553 extern int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
1555 extern void xfrm_input_init(void);
1556 extern int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1558 extern void xfrm_probe_algs(void);
1559 extern int xfrm_count_auth_supported(void);
1560 extern int xfrm_count_enc_supported(void);
1561 extern struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1562 extern struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1563 extern struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1564 extern struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1565 extern struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1566 extern struct xfrm_algo_desc
*xfrm_aalg_get_byname(const char *name
, int probe
);
1567 extern struct xfrm_algo_desc
*xfrm_ealg_get_byname(const char *name
, int probe
);
1568 extern struct xfrm_algo_desc
*xfrm_calg_get_byname(const char *name
, int probe
);
1569 extern struct xfrm_algo_desc
*xfrm_aead_get_byname(const char *name
, int icv_len
,
1572 static inline int xfrm_addr_cmp(const xfrm_address_t
*a
,
1573 const xfrm_address_t
*b
,
1579 return (__force u32
)a
->a4
- (__force u32
)b
->a4
;
1581 return ipv6_addr_cmp((const struct in6_addr
*)a
,
1582 (const struct in6_addr
*)b
);
1586 static inline int xfrm_policy_id2dir(u32 index
)
1592 static inline int xfrm_aevent_is_on(struct net
*net
)
1598 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1600 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1606 static inline int xfrm_alg_len(const struct xfrm_algo
*alg
)
1608 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1611 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth
*alg
)
1613 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1616 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn
*replay_esn
)
1618 return sizeof(*replay_esn
) + replay_esn
->bmp_len
* sizeof(__u32
);
1621 #ifdef CONFIG_XFRM_MIGRATE
1622 static inline int xfrm_replay_clone(struct xfrm_state
*x
,
1623 struct xfrm_state
*orig
)
1625 x
->replay_esn
= kzalloc(xfrm_replay_state_esn_len(orig
->replay_esn
),
1630 x
->replay_esn
->bmp_len
= orig
->replay_esn
->bmp_len
;
1631 x
->replay_esn
->replay_window
= orig
->replay_esn
->replay_window
;
1633 x
->preplay_esn
= kmemdup(x
->replay_esn
,
1634 xfrm_replay_state_esn_len(x
->replay_esn
),
1636 if (!x
->preplay_esn
) {
1637 kfree(x
->replay_esn
);
1644 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1646 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1649 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1651 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1654 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1657 for (i
= 0; i
< n
; i
++)
1658 xfrm_state_put(*(states
+ i
));
1661 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1664 for (i
= 0; i
< n
; i
++)
1665 xfrm_state_delete(*(states
+ i
));
1670 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1672 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1676 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1678 if (attrs
[XFRMA_MARK
])
1679 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1686 static inline int xfrm_mark_put(struct sk_buff
*skb
, const struct xfrm_mark
*m
)
1689 NLA_PUT(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1696 #endif /* _NET_XFRM_H */