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)
49 #define XFRM_INC_STATS(net, field) ((void)(net))
53 /* Organization of SPD aka "XFRM rules"
54 ------------------------------------
57 - policy rule, struct xfrm_policy (=SPD entry)
58 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
59 - instance of a transformer, struct xfrm_state (=SA)
60 - template to clone xfrm_state, struct xfrm_tmpl
62 SPD is plain linear list of xfrm_policy rules, ordered by priority.
63 (To be compatible with existing pfkeyv2 implementations,
64 many rules with priority of 0x7fffffff are allowed to exist and
65 such rules are ordered in an unpredictable way, thanks to bsd folks.)
67 Lookup is plain linear search until the first match with selector.
69 If "action" is "block", then we prohibit the flow, otherwise:
70 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
71 policy entry has list of up to XFRM_MAX_DEPTH transformations,
72 described by templates xfrm_tmpl. Each template is resolved
73 to a complete xfrm_state (see below) and we pack bundle of transformations
74 to a dst_entry returned to requestor.
76 dst -. xfrm .-> xfrm_state #1
77 |---. child .-> dst -. xfrm .-> xfrm_state #2
78 |---. child .-> dst -. xfrm .-> xfrm_state #3
81 Bundles are cached at xrfm_policy struct (field ->bundles).
84 Resolution of xrfm_tmpl
85 -----------------------
87 1. ->mode Mode: transport or tunnel
88 2. ->id.proto Protocol: AH/ESP/IPCOMP
89 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
90 Q: allow to resolve security gateway?
91 4. ->id.spi If not zero, static SPI.
92 5. ->saddr Local tunnel endpoint, ignored for transport mode.
93 6. ->algos List of allowed algos. Plain bitmask now.
94 Q: ealgos, aalgos, calgos. What a mess...
95 7. ->share Sharing mode.
96 Q: how to implement private sharing mode? To add struct sock* to
99 Having this template we search through SAD searching for entries
100 with appropriate mode/proto/algo, permitted by selector.
101 If no appropriate entry found, it is requested from key manager.
104 Q: How to find all the bundles referring to a physical path for
105 PMTU discovery? Seems, dst should contain list of all parents...
106 and enter to infinite locking hierarchy disaster.
107 No! It is easier, we will not search for them, let them find us.
108 We add genid to each dst plus pointer to genid of raw IP route,
109 pmtu disc will update pmtu on raw IP route and increase its genid.
110 dst_check() will see this for top level and trigger resyncing
111 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
114 struct xfrm_state_walk
{
115 struct list_head all
;
120 struct xfrm_address_filter
*filter
;
123 /* Full description of state of transformer. */
125 possible_net_t xs_net
;
127 struct hlist_node gclist
;
128 struct hlist_node bydst
;
130 struct hlist_node bysrc
;
131 struct hlist_node byspi
;
137 struct xfrm_selector sel
;
138 struct xfrm_mark mark
;
143 /* Key manager bits */
144 struct xfrm_state_walk km
;
146 /* Parameters of this state. */
151 u8 aalgo
, ealgo
, calgo
;
154 xfrm_address_t saddr
;
160 struct xfrm_lifetime_cfg lft
;
162 /* Data for transformer */
163 struct xfrm_algo_auth
*aalg
;
164 struct xfrm_algo
*ealg
;
165 struct xfrm_algo
*calg
;
166 struct xfrm_algo_aead
*aead
;
169 /* Data for encapsulator */
170 struct xfrm_encap_tmpl
*encap
;
172 /* Data for care-of address */
173 xfrm_address_t
*coaddr
;
175 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
176 struct xfrm_state
*tunnel
;
178 /* If a tunnel, number of users + 1 */
179 atomic_t tunnel_users
;
181 /* State for replay detection */
182 struct xfrm_replay_state replay
;
183 struct xfrm_replay_state_esn
*replay_esn
;
185 /* Replay detection state at the time we sent the last notification */
186 struct xfrm_replay_state preplay
;
187 struct xfrm_replay_state_esn
*preplay_esn
;
189 /* The functions for replay detection. */
190 const struct xfrm_replay
*repl
;
192 /* internal flag that only holds state for delayed aevent at the
197 /* Replay detection notification settings */
201 /* Replay detection notification timer */
202 struct timer_list rtimer
;
205 struct xfrm_stats stats
;
207 struct xfrm_lifetime_cur curlft
;
208 struct tasklet_hrtimer mtimer
;
210 /* used to fix curlft->add_time when changing date */
214 unsigned long lastused
;
216 struct page_frag xfrag
;
218 /* Reference to data common to all the instances of this
220 const struct xfrm_type
*type
;
221 struct xfrm_mode
*inner_mode
;
222 struct xfrm_mode
*inner_mode_iaf
;
223 struct xfrm_mode
*outer_mode
;
225 /* Security context */
226 struct xfrm_sec_ctx
*security
;
228 /* Private data of this transformer, format is opaque,
229 * interpreted by xfrm_type methods. */
233 static inline struct net
*xs_net(struct xfrm_state
*x
)
235 return read_pnet(&x
->xs_net
);
238 /* xflags - make enum if more show up */
239 #define XFRM_TIME_DEFER 1
240 #define XFRM_SOFT_EXPIRE 2
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 struct dst_ops
*dst_ops
;
284 struct dst_entry
*(*dst_lookup
)(struct net
*net
,
286 const xfrm_address_t
*saddr
,
287 const xfrm_address_t
*daddr
);
288 int (*get_saddr
)(struct net
*net
, int oif
,
289 xfrm_address_t
*saddr
,
290 xfrm_address_t
*daddr
);
291 void (*decode_session
)(struct sk_buff
*skb
,
294 int (*get_tos
)(const struct flowi
*fl
);
295 int (*init_path
)(struct xfrm_dst
*path
,
296 struct dst_entry
*dst
,
298 int (*fill_dst
)(struct xfrm_dst
*xdst
,
299 struct net_device
*dev
,
300 const struct flowi
*fl
);
301 struct dst_entry
*(*blackhole_route
)(struct net
*net
, struct dst_entry
*orig
);
304 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo
*afinfo
, int family
);
305 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo
*afinfo
);
306 void km_policy_notify(struct xfrm_policy
*xp
, int dir
,
307 const struct km_event
*c
);
308 void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
);
311 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
,
312 struct xfrm_policy
*pol
);
313 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 portid
);
314 int __xfrm_state_delete(struct xfrm_state
*x
);
316 struct xfrm_state_afinfo
{
320 struct module
*owner
;
321 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
322 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
323 int (*init_flags
)(struct xfrm_state
*x
);
324 void (*init_tempsel
)(struct xfrm_selector
*sel
,
325 const struct flowi
*fl
);
326 void (*init_temprop
)(struct xfrm_state
*x
,
327 const struct xfrm_tmpl
*tmpl
,
328 const xfrm_address_t
*daddr
,
329 const xfrm_address_t
*saddr
);
330 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
331 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
332 int (*output
)(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
333 int (*output_finish
)(struct sock
*sk
, struct sk_buff
*skb
);
334 int (*extract_input
)(struct xfrm_state
*x
,
335 struct sk_buff
*skb
);
336 int (*extract_output
)(struct xfrm_state
*x
,
337 struct sk_buff
*skb
);
338 int (*transport_finish
)(struct sk_buff
*skb
,
340 void (*local_error
)(struct sk_buff
*skb
, u32 mtu
);
343 int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
344 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
345 struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
);
346 struct xfrm_state_afinfo
*xfrm_state_afinfo_get_rcu(unsigned int family
);
348 struct xfrm_input_afinfo
{
350 int (*callback
)(struct sk_buff
*skb
, u8 protocol
,
354 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo
*afinfo
);
355 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo
*afinfo
);
357 void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
361 struct module
*owner
;
364 #define XFRM_TYPE_NON_FRAGMENT 1
365 #define XFRM_TYPE_REPLAY_PROT 2
366 #define XFRM_TYPE_LOCAL_COADDR 4
367 #define XFRM_TYPE_REMOTE_COADDR 8
369 int (*init_state
)(struct xfrm_state
*x
);
370 void (*destructor
)(struct xfrm_state
*);
371 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
372 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
373 int (*reject
)(struct xfrm_state
*, struct sk_buff
*,
374 const struct flowi
*);
375 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
376 /* Estimate maximal size of result of transformation of a dgram */
377 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
380 int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
381 int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
385 * Remove encapsulation header.
387 * The IP header will be moved over the top of the encapsulation
390 * On entry, the transport header shall point to where the IP header
391 * should be and the network header shall be set to where the IP
392 * header currently is. skb->data shall point to the start of the
395 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
398 * This is the actual input entry point.
400 * For transport mode and equivalent this would be identical to
401 * input2 (which does not need to be set). While tunnel mode
402 * and equivalent would set this to the tunnel encapsulation function
403 * xfrm4_prepare_input that would in turn call input2.
405 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
408 * Add encapsulation header.
410 * On exit, the transport header will be set to the start of the
411 * encapsulation header to be filled in by x->type->output and
412 * the mac header will be set to the nextheader (protocol for
413 * IPv4) field of the extension header directly preceding the
414 * encapsulation header, or in its absence, that of the top IP
415 * header. The value of the network header will always point
416 * to the top IP header while skb->data will point to the payload.
418 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
421 * This is the actual output entry point.
423 * For transport mode and equivalent this would be identical to
424 * output2 (which does not need to be set). While tunnel mode
425 * and equivalent would set this to a tunnel encapsulation function
426 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
429 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
431 struct xfrm_state_afinfo
*afinfo
;
432 struct module
*owner
;
437 /* Flags for xfrm_mode. */
439 XFRM_MODE_FLAG_TUNNEL
= 1,
442 int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
443 int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
445 static inline int xfrm_af2proto(unsigned int family
)
457 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
459 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
460 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
461 return x
->inner_mode
;
463 return x
->inner_mode_iaf
;
467 /* id in template is interpreted as:
468 * daddr - destination of tunnel, may be zero for transport mode.
469 * spi - zero to acquire spi. Not zero if spi is static, then
470 * daddr must be fixed too.
471 * proto - AH/ESP/IPCOMP
475 /* Source address of tunnel. Ignored, if it is not a tunnel. */
476 xfrm_address_t saddr
;
478 unsigned short encap_family
;
482 /* Mode: transport, tunnel etc. */
485 /* Sharing mode: unique, this session only, this user only etc. */
488 /* May skip this transfomration if no SA is found */
491 /* Skip aalgos/ealgos/calgos checks. */
494 /* Bit mask of algos allowed for acquisition */
500 #define XFRM_MAX_DEPTH 6
501 #define XFRM_MAX_OFFLOAD_DEPTH 1
503 struct xfrm_policy_walk_entry
{
504 struct list_head all
;
508 struct xfrm_policy_walk
{
509 struct xfrm_policy_walk_entry walk
;
514 struct xfrm_policy_queue
{
515 struct sk_buff_head hold_queue
;
516 struct timer_list hold_timer
;
517 unsigned long timeout
;
521 possible_net_t xp_net
;
522 struct hlist_node bydst
;
523 struct hlist_node byidx
;
525 /* This lock only affects elements except for entry. */
528 struct timer_list timer
;
530 struct flow_cache_object flo
;
534 struct xfrm_mark mark
;
535 struct xfrm_selector selector
;
536 struct xfrm_lifetime_cfg lft
;
537 struct xfrm_lifetime_cur curlft
;
538 struct xfrm_policy_walk_entry walk
;
539 struct xfrm_policy_queue polq
;
545 struct xfrm_sec_ctx
*security
;
546 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
550 static inline struct net
*xp_net(const struct xfrm_policy
*xp
)
552 return read_pnet(&xp
->xp_net
);
555 struct xfrm_kmaddress
{
556 xfrm_address_t local
;
557 xfrm_address_t remote
;
562 struct xfrm_migrate
{
563 xfrm_address_t old_daddr
;
564 xfrm_address_t old_saddr
;
565 xfrm_address_t new_daddr
;
566 xfrm_address_t new_saddr
;
575 #define XFRM_KM_TIMEOUT 30
577 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
578 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
580 /* default aevent timeout in units of 100ms */
581 #define XFRM_AE_ETIME 10
582 /* Async Event timer multiplier */
583 #define XFRM_AE_ETH_M 10
584 /* default seq threshold size */
585 #define XFRM_AE_SEQT_SIZE 2
588 struct list_head list
;
589 int (*notify
)(struct xfrm_state
*x
, const struct km_event
*c
);
590 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
);
591 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
592 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
593 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, const struct km_event
*c
);
594 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
595 int (*migrate
)(const struct xfrm_selector
*sel
,
597 const struct xfrm_migrate
*m
,
599 const struct xfrm_kmaddress
*k
);
600 bool (*is_alive
)(const struct km_event
*c
);
603 int xfrm_register_km(struct xfrm_mgr
*km
);
604 int xfrm_unregister_km(struct xfrm_mgr
*km
);
606 struct xfrm_tunnel_skb_cb
{
608 struct inet_skb_parm h4
;
609 struct inet6_skb_parm h6
;
613 struct ip_tunnel
*ip4
;
618 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
621 * This structure is used for the duration where packets are being
622 * transformed by IPsec. As soon as the packet leaves IPsec the
623 * area beyond the generic IP part may be overwritten.
626 struct xfrm_tunnel_skb_cb header
;
628 /* Sequence number for replay protection. */
641 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
644 * This structure is used by the afinfo prepare_input/prepare_output functions
645 * to transmit header information to the mode input/output functions.
647 struct xfrm_mode_skb_cb
{
648 struct xfrm_tunnel_skb_cb header
;
650 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
654 /* IP header length (excluding options or extension headers). */
657 /* TOS for IPv4, class for IPv6. */
660 /* TTL for IPv4, hop limitfor IPv6. */
663 /* Protocol for IPv4, NH for IPv6. */
666 /* Option length for IPv4, zero for IPv6. */
669 /* Used by IPv6 only, zero for IPv4. */
673 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
676 * This structure is used by the input processing to locate the SPI and
677 * related information.
679 struct xfrm_spi_skb_cb
{
680 struct xfrm_tunnel_skb_cb header
;
682 unsigned int daddroff
;
687 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
689 #ifdef CONFIG_AUDITSYSCALL
690 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
692 struct audit_buffer
*audit_buf
= NULL
;
694 if (audit_enabled
== 0)
696 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
697 AUDIT_MAC_IPSEC_EVENT
);
698 if (audit_buf
== NULL
)
700 audit_log_format(audit_buf
, "op=%s", op
);
704 static inline void xfrm_audit_helper_usrinfo(bool task_valid
,
705 struct audit_buffer
*audit_buf
)
707 const unsigned int auid
= from_kuid(&init_user_ns
, task_valid
?
708 audit_get_loginuid(current
) :
710 const unsigned int ses
= task_valid
? audit_get_sessionid(current
) :
713 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
714 audit_log_task_context(audit_buf
);
717 void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
, bool task_valid
);
718 void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
720 void xfrm_audit_state_add(struct xfrm_state
*x
, int result
, bool task_valid
);
721 void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
, bool task_valid
);
722 void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
723 struct sk_buff
*skb
);
724 void xfrm_audit_state_replay(struct xfrm_state
*x
, struct sk_buff
*skb
,
726 void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
727 void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
, __be32 net_spi
,
729 void xfrm_audit_state_icvfail(struct xfrm_state
*x
, struct sk_buff
*skb
,
733 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
738 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
743 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
748 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
753 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
758 static inline void xfrm_audit_state_replay(struct xfrm_state
*x
,
759 struct sk_buff
*skb
, __be32 net_seq
)
763 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
768 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
769 __be32 net_spi
, __be32 net_seq
)
773 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
774 struct sk_buff
*skb
, u8 proto
)
777 #endif /* CONFIG_AUDITSYSCALL */
779 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
781 if (likely(policy
!= NULL
))
782 atomic_inc(&policy
->refcnt
);
785 void xfrm_policy_destroy(struct xfrm_policy
*policy
);
787 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
789 if (atomic_dec_and_test(&policy
->refcnt
))
790 xfrm_policy_destroy(policy
);
793 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
796 for (i
= npols
- 1; i
>= 0; --i
)
797 xfrm_pol_put(pols
[i
]);
800 void __xfrm_state_destroy(struct xfrm_state
*);
802 static inline void __xfrm_state_put(struct xfrm_state
*x
)
804 atomic_dec(&x
->refcnt
);
807 static inline void xfrm_state_put(struct xfrm_state
*x
)
809 if (atomic_dec_and_test(&x
->refcnt
))
810 __xfrm_state_destroy(x
);
813 static inline void xfrm_state_hold(struct xfrm_state
*x
)
815 atomic_inc(&x
->refcnt
);
818 static inline bool addr_match(const void *token1
, const void *token2
,
819 unsigned int prefixlen
)
821 const __be32
*a1
= token1
;
822 const __be32
*a2
= token2
;
826 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
827 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
830 if (memcmp(a1
, a2
, pdw
<< 2))
836 mask
= htonl((0xffffffff) << (32 - pbi
));
838 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
845 static inline bool addr4_match(__be32 a1
, __be32 a2
, u8 prefixlen
)
847 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
848 if (sizeof(long) == 4 && prefixlen
== 0)
850 return !((a1
^ a2
) & htonl(~0UL << (32 - prefixlen
)));
854 __be16
xfrm_flowi_sport(const struct flowi
*fl
, const union flowi_uli
*uli
)
857 switch(fl
->flowi_proto
) {
860 case IPPROTO_UDPLITE
:
862 port
= uli
->ports
.sport
;
866 port
= htons(uli
->icmpt
.type
);
869 port
= htons(uli
->mht
.type
);
872 port
= htons(ntohl(uli
->gre_key
) >> 16);
881 __be16
xfrm_flowi_dport(const struct flowi
*fl
, const union flowi_uli
*uli
)
884 switch(fl
->flowi_proto
) {
887 case IPPROTO_UDPLITE
:
889 port
= uli
->ports
.dport
;
893 port
= htons(uli
->icmpt
.code
);
896 port
= htons(ntohl(uli
->gre_key
) & 0xffff);
904 bool xfrm_selector_match(const struct xfrm_selector
*sel
,
905 const struct flowi
*fl
, unsigned short family
);
907 #ifdef CONFIG_SECURITY_NETWORK_XFRM
908 /* If neither has a context --> match
909 * Otherwise, both must have a context and the sids, doi, alg must match
911 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
913 return ((!s1
&& !s2
) ||
915 (s1
->ctx_sid
== s2
->ctx_sid
) &&
916 (s1
->ctx_doi
== s2
->ctx_doi
) &&
917 (s1
->ctx_alg
== s2
->ctx_alg
)));
920 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
926 /* A struct encoding bundle of transformations to apply to some set of flow.
928 * dst->child points to the next element of bundle.
929 * dst->xfrm points to an instanse of transformer.
931 * Due to unfortunate limitations of current routing cache, which we
932 * have no time to fix, it mirrors struct rtable and bound to the same
933 * routing key, including saddr,daddr. However, we can have many of
934 * bundles differing by session id. All the bundles grow from a parent
939 struct dst_entry dst
;
943 struct dst_entry
*route
;
944 struct flow_cache_object flo
;
945 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
946 int num_pols
, num_xfrms
;
947 #ifdef CONFIG_XFRM_SUB_POLICY
948 struct flowi
*origin
;
949 struct xfrm_selector
*partner
;
953 u32 route_mtu_cached
;
954 u32 child_mtu_cached
;
960 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
962 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
963 dst_release(xdst
->route
);
964 if (likely(xdst
->u
.dst
.xfrm
))
965 xfrm_state_put(xdst
->u
.dst
.xfrm
);
966 #ifdef CONFIG_XFRM_SUB_POLICY
969 kfree(xdst
->partner
);
970 xdst
->partner
= NULL
;
975 void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
977 struct xfrm_offload
{
978 /* Output sequence number for replay protection on offloading. */
985 #define SA_DELETE_REQ 1
986 #define CRYPTO_DONE 2
987 #define CRYPTO_NEXT_DONE 4
988 #define CRYPTO_FALLBACK 8
989 #define XFRM_GSO_SEGMENT 16
993 #define CRYPTO_SUCCESS 1
994 #define CRYPTO_GENERIC_ERROR 2
995 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
996 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
997 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
998 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
999 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1000 #define CRYPTO_INVALID_PROTOCOL 128
1010 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
1011 struct xfrm_offload ovec
[XFRM_MAX_OFFLOAD_DEPTH
];
1014 static inline int secpath_exists(struct sk_buff
*skb
)
1017 return skb
->sp
!= NULL
;
1023 static inline struct sec_path
*
1024 secpath_get(struct sec_path
*sp
)
1027 atomic_inc(&sp
->refcnt
);
1031 void __secpath_destroy(struct sec_path
*sp
);
1034 secpath_put(struct sec_path
*sp
)
1036 if (sp
&& atomic_dec_and_test(&sp
->refcnt
))
1037 __secpath_destroy(sp
);
1040 struct sec_path
*secpath_dup(struct sec_path
*src
);
1041 int secpath_set(struct sk_buff
*skb
);
1044 secpath_reset(struct sk_buff
*skb
)
1047 secpath_put(skb
->sp
);
1053 xfrm_addr_any(const xfrm_address_t
*addr
, unsigned short family
)
1057 return addr
->a4
== 0;
1059 return ipv6_addr_any(&addr
->in6
);
1065 __xfrm4_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1067 return (tmpl
->saddr
.a4
&&
1068 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
1072 __xfrm6_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1074 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
1075 !ipv6_addr_equal((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
1079 xfrm_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
, unsigned short family
)
1083 return __xfrm4_state_addr_cmp(tmpl
, x
);
1085 return __xfrm6_state_addr_cmp(tmpl
, x
);
1091 int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
,
1092 unsigned short family
);
1094 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
1095 struct sk_buff
*skb
,
1096 unsigned int family
, int reverse
)
1098 struct net
*net
= dev_net(skb
->dev
);
1099 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
1101 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
1102 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1104 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1105 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
1106 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1109 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1111 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1114 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1116 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1119 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1121 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1124 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1125 struct sk_buff
*skb
)
1127 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1130 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1131 struct sk_buff
*skb
)
1133 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1136 int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1137 unsigned int family
, int reverse
);
1139 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1140 unsigned int family
)
1142 return __xfrm_decode_session(skb
, fl
, family
, 0);
1145 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1147 unsigned int family
)
1149 return __xfrm_decode_session(skb
, fl
, family
, 1);
1152 int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1154 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1156 struct net
*net
= dev_net(skb
->dev
);
1158 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1159 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1160 __xfrm_route_forward(skb
, family
);
1163 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1165 return xfrm_route_forward(skb
, AF_INET
);
1168 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1170 return xfrm_route_forward(skb
, AF_INET6
);
1173 int __xfrm_sk_clone_policy(struct sock
*sk
, const struct sock
*osk
);
1175 static inline int xfrm_sk_clone_policy(struct sock
*sk
, const struct sock
*osk
)
1177 sk
->sk_policy
[0] = NULL
;
1178 sk
->sk_policy
[1] = NULL
;
1179 if (unlikely(osk
->sk_policy
[0] || osk
->sk_policy
[1]))
1180 return __xfrm_sk_clone_policy(sk
, osk
);
1184 int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1186 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1188 struct xfrm_policy
*pol
;
1190 pol
= rcu_dereference_protected(sk
->sk_policy
[0], 1);
1191 if (unlikely(pol
!= NULL
)) {
1192 xfrm_policy_delete(pol
, XFRM_POLICY_MAX
);
1193 sk
->sk_policy
[0] = NULL
;
1195 pol
= rcu_dereference_protected(sk
->sk_policy
[1], 1);
1196 if (unlikely(pol
!= NULL
)) {
1197 xfrm_policy_delete(pol
, XFRM_POLICY_MAX
+1);
1198 sk
->sk_policy
[1] = NULL
;
1202 void xfrm_garbage_collect(struct net
*net
);
1203 void xfrm_garbage_collect_deferred(struct net
*net
);
1207 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1208 static inline int xfrm_sk_clone_policy(struct sock
*sk
, const struct sock
*osk
) { return 0; }
1209 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1210 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1211 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1215 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1219 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1223 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1225 unsigned int family
)
1229 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1230 struct sk_buff
*skb
)
1234 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1235 struct sk_buff
*skb
)
1239 static inline void xfrm_garbage_collect(struct net
*net
)
1245 xfrm_address_t
*xfrm_flowi_daddr(const struct flowi
*fl
, unsigned short family
)
1249 return (xfrm_address_t
*)&fl
->u
.ip4
.daddr
;
1251 return (xfrm_address_t
*)&fl
->u
.ip6
.daddr
;
1257 xfrm_address_t
*xfrm_flowi_saddr(const struct flowi
*fl
, unsigned short family
)
1261 return (xfrm_address_t
*)&fl
->u
.ip4
.saddr
;
1263 return (xfrm_address_t
*)&fl
->u
.ip6
.saddr
;
1269 void xfrm_flowi_addr_get(const struct flowi
*fl
,
1270 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1271 unsigned short family
)
1275 memcpy(&saddr
->a4
, &fl
->u
.ip4
.saddr
, sizeof(saddr
->a4
));
1276 memcpy(&daddr
->a4
, &fl
->u
.ip4
.daddr
, sizeof(daddr
->a4
));
1279 saddr
->in6
= fl
->u
.ip6
.saddr
;
1280 daddr
->in6
= fl
->u
.ip6
.daddr
;
1285 static __inline__
int
1286 __xfrm4_state_addr_check(const struct xfrm_state
*x
,
1287 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1289 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1290 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1295 static __inline__
int
1296 __xfrm6_state_addr_check(const struct xfrm_state
*x
,
1297 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1299 if (ipv6_addr_equal((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1300 (ipv6_addr_equal((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
) ||
1301 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1302 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1307 static __inline__
int
1308 xfrm_state_addr_check(const struct xfrm_state
*x
,
1309 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1310 unsigned short family
)
1314 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1316 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1321 static __inline__
int
1322 xfrm_state_addr_flow_check(const struct xfrm_state
*x
, const struct flowi
*fl
,
1323 unsigned short family
)
1327 return __xfrm4_state_addr_check(x
,
1328 (const xfrm_address_t
*)&fl
->u
.ip4
.daddr
,
1329 (const xfrm_address_t
*)&fl
->u
.ip4
.saddr
);
1331 return __xfrm6_state_addr_check(x
,
1332 (const xfrm_address_t
*)&fl
->u
.ip6
.daddr
,
1333 (const xfrm_address_t
*)&fl
->u
.ip6
.saddr
);
1338 static inline int xfrm_state_kern(const struct xfrm_state
*x
)
1340 return atomic_read(&x
->tunnel_users
);
1343 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1345 return (!userproto
|| proto
== userproto
||
1346 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1347 proto
== IPPROTO_ESP
||
1348 proto
== IPPROTO_COMP
)));
1352 * xfrm algorithm information
1354 struct xfrm_algo_aead_info
{
1359 struct xfrm_algo_auth_info
{
1364 struct xfrm_algo_encr_info
{
1370 struct xfrm_algo_comp_info
{
1374 struct xfrm_algo_desc
{
1378 u8 pfkey_supported
:1;
1380 struct xfrm_algo_aead_info aead
;
1381 struct xfrm_algo_auth_info auth
;
1382 struct xfrm_algo_encr_info encr
;
1383 struct xfrm_algo_comp_info comp
;
1385 struct sadb_alg desc
;
1388 /* XFRM protocol handlers. */
1389 struct xfrm4_protocol
{
1390 int (*handler
)(struct sk_buff
*skb
);
1391 int (*input_handler
)(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1393 int (*cb_handler
)(struct sk_buff
*skb
, int err
);
1394 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1396 struct xfrm4_protocol __rcu
*next
;
1400 struct xfrm6_protocol
{
1401 int (*handler
)(struct sk_buff
*skb
);
1402 int (*cb_handler
)(struct sk_buff
*skb
, int err
);
1403 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1404 u8 type
, u8 code
, int offset
, __be32 info
);
1406 struct xfrm6_protocol __rcu
*next
;
1410 /* XFRM tunnel handlers. */
1411 struct xfrm_tunnel
{
1412 int (*handler
)(struct sk_buff
*skb
);
1413 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1415 struct xfrm_tunnel __rcu
*next
;
1419 struct xfrm6_tunnel
{
1420 int (*handler
)(struct sk_buff
*skb
);
1421 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1422 u8 type
, u8 code
, int offset
, __be32 info
);
1423 struct xfrm6_tunnel __rcu
*next
;
1427 void xfrm_init(void);
1428 void xfrm4_init(void);
1429 int xfrm_state_init(struct net
*net
);
1430 void xfrm_state_fini(struct net
*net
);
1431 void xfrm4_state_init(void);
1432 void xfrm4_protocol_init(void);
1434 int xfrm6_init(void);
1435 void xfrm6_fini(void);
1436 int xfrm6_state_init(void);
1437 void xfrm6_state_fini(void);
1438 int xfrm6_protocol_init(void);
1439 void xfrm6_protocol_fini(void);
1441 static inline int xfrm6_init(void)
1445 static inline void xfrm6_fini(void)
1451 #ifdef CONFIG_XFRM_STATISTICS
1452 int xfrm_proc_init(struct net
*net
);
1453 void xfrm_proc_fini(struct net
*net
);
1456 int xfrm_sysctl_init(struct net
*net
);
1457 #ifdef CONFIG_SYSCTL
1458 void xfrm_sysctl_fini(struct net
*net
);
1460 static inline void xfrm_sysctl_fini(struct net
*net
)
1465 void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
,
1466 struct xfrm_address_filter
*filter
);
1467 int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1468 int (*func
)(struct xfrm_state
*, int, void*), void *);
1469 void xfrm_state_walk_done(struct xfrm_state_walk
*walk
, struct net
*net
);
1470 struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1471 struct xfrm_state
*xfrm_state_find(const xfrm_address_t
*daddr
,
1472 const xfrm_address_t
*saddr
,
1473 const struct flowi
*fl
,
1474 struct xfrm_tmpl
*tmpl
,
1475 struct xfrm_policy
*pol
, int *err
,
1476 unsigned short family
);
1477 struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1478 xfrm_address_t
*daddr
,
1479 xfrm_address_t
*saddr
,
1480 unsigned short family
,
1481 u8 mode
, u8 proto
, u32 reqid
);
1482 struct xfrm_state
*xfrm_state_lookup_byspi(struct net
*net
, __be32 spi
,
1483 unsigned short family
);
1484 int xfrm_state_check_expire(struct xfrm_state
*x
);
1485 void xfrm_state_insert(struct xfrm_state
*x
);
1486 int xfrm_state_add(struct xfrm_state
*x
);
1487 int xfrm_state_update(struct xfrm_state
*x
);
1488 struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1489 const xfrm_address_t
*daddr
, __be32 spi
,
1490 u8 proto
, unsigned short family
);
1491 struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1492 const xfrm_address_t
*daddr
,
1493 const xfrm_address_t
*saddr
,
1495 unsigned short family
);
1496 #ifdef CONFIG_XFRM_SUB_POLICY
1497 int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
,
1498 unsigned short family
, struct net
*net
);
1499 int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
,
1500 unsigned short family
);
1502 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1503 int n
, unsigned short family
, struct net
*net
)
1508 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1509 int n
, unsigned short family
)
1515 struct xfrmk_sadinfo
{
1516 u32 sadhcnt
; /* current hash bkts */
1517 u32 sadhmcnt
; /* max allowed hash bkts */
1518 u32 sadcnt
; /* current running count */
1521 struct xfrmk_spdinfo
{
1532 struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
);
1533 int xfrm_state_delete(struct xfrm_state
*x
);
1534 int xfrm_state_flush(struct net
*net
, u8 proto
, bool task_valid
);
1535 void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1536 void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1537 u32
xfrm_replay_seqhi(struct xfrm_state
*x
, __be32 net_seq
);
1538 int xfrm_init_replay(struct xfrm_state
*x
);
1539 int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1540 int __xfrm_init_state(struct xfrm_state
*x
, bool init_replay
);
1541 int xfrm_init_state(struct xfrm_state
*x
);
1542 int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1543 int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
, int encap_type
);
1544 int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1545 int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1546 int xfrm_output(struct sock
*sk
, struct sk_buff
*skb
);
1547 int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1548 void xfrm_local_error(struct sk_buff
*skb
, int mtu
);
1549 int xfrm4_extract_header(struct sk_buff
*skb
);
1550 int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1551 int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1553 int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1554 int xfrm4_rcv(struct sk_buff
*skb
);
1555 int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1557 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1559 XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip4
= NULL
;
1560 XFRM_SPI_SKB_CB(skb
)->family
= AF_INET
;
1561 XFRM_SPI_SKB_CB(skb
)->daddroff
= offsetof(struct iphdr
, daddr
);
1562 return xfrm_input(skb
, nexthdr
, spi
, 0);
1565 int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1566 int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1567 int xfrm4_output(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
1568 int xfrm4_output_finish(struct sock
*sk
, struct sk_buff
*skb
);
1569 int xfrm4_rcv_cb(struct sk_buff
*skb
, u8 protocol
, int err
);
1570 int xfrm4_protocol_register(struct xfrm4_protocol
*handler
, unsigned char protocol
);
1571 int xfrm4_protocol_deregister(struct xfrm4_protocol
*handler
, unsigned char protocol
);
1572 int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1573 int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1574 void xfrm4_local_error(struct sk_buff
*skb
, u32 mtu
);
1575 int xfrm6_extract_header(struct sk_buff
*skb
);
1576 int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1577 int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1579 int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1580 int xfrm6_rcv_tnl(struct sk_buff
*skb
, struct ip6_tnl
*t
);
1581 int xfrm6_rcv(struct sk_buff
*skb
);
1582 int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1583 xfrm_address_t
*saddr
, u8 proto
);
1584 void xfrm6_local_error(struct sk_buff
*skb
, u32 mtu
);
1585 int xfrm6_rcv_cb(struct sk_buff
*skb
, u8 protocol
, int err
);
1586 int xfrm6_protocol_register(struct xfrm6_protocol
*handler
, unsigned char protocol
);
1587 int xfrm6_protocol_deregister(struct xfrm6_protocol
*handler
, unsigned char protocol
);
1588 int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1589 int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1590 __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1591 __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, const xfrm_address_t
*saddr
);
1592 int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1593 int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1594 int xfrm6_output(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
1595 int xfrm6_output_finish(struct sock
*sk
, struct sk_buff
*skb
);
1596 int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1600 int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1601 int xfrm_user_policy(struct sock
*sk
, int optname
,
1602 u8 __user
*optval
, int optlen
);
1604 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1606 return -ENOPROTOOPT
;
1609 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1611 /* should not happen */
1617 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1619 void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1620 int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1621 int (*func
)(struct xfrm_policy
*, int, int, void*),
1623 void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
, struct net
*net
);
1624 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1625 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1627 struct xfrm_selector
*sel
,
1628 struct xfrm_sec_ctx
*ctx
, int delete,
1630 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
,
1631 u32 id
, int delete, int *err
);
1632 int xfrm_policy_flush(struct net
*net
, u8 type
, bool task_valid
);
1633 void xfrm_policy_hash_rebuild(struct net
*net
);
1634 u32
xfrm_get_acqseq(void);
1635 int verify_spi_info(u8 proto
, u32 min
, u32 max
);
1636 int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1637 struct xfrm_state
*xfrm_find_acq(struct net
*net
, const struct xfrm_mark
*mark
,
1638 u8 mode
, u32 reqid
, u8 proto
,
1639 const xfrm_address_t
*daddr
,
1640 const xfrm_address_t
*saddr
, int create
,
1641 unsigned short family
);
1642 int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1644 #ifdef CONFIG_XFRM_MIGRATE
1645 int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1646 const struct xfrm_migrate
*m
, int num_bundles
,
1647 const struct xfrm_kmaddress
*k
);
1648 struct xfrm_state
*xfrm_migrate_state_find(struct xfrm_migrate
*m
, struct net
*net
);
1649 struct xfrm_state
*xfrm_state_migrate(struct xfrm_state
*x
,
1650 struct xfrm_migrate
*m
);
1651 int xfrm_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1652 struct xfrm_migrate
*m
, int num_bundles
,
1653 struct xfrm_kmaddress
*k
, struct net
*net
);
1656 int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1657 void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 portid
);
1658 int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
,
1659 xfrm_address_t
*addr
);
1661 void xfrm_input_init(void);
1662 int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1664 void xfrm_probe_algs(void);
1665 int xfrm_count_pfkey_auth_supported(void);
1666 int xfrm_count_pfkey_enc_supported(void);
1667 struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1668 struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1669 struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1670 struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1671 struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1672 struct xfrm_algo_desc
*xfrm_aalg_get_byname(const char *name
, int probe
);
1673 struct xfrm_algo_desc
*xfrm_ealg_get_byname(const char *name
, int probe
);
1674 struct xfrm_algo_desc
*xfrm_calg_get_byname(const char *name
, int probe
);
1675 struct xfrm_algo_desc
*xfrm_aead_get_byname(const char *name
, int icv_len
,
1678 static inline bool xfrm6_addr_equal(const xfrm_address_t
*a
,
1679 const xfrm_address_t
*b
)
1681 return ipv6_addr_equal((const struct in6_addr
*)a
,
1682 (const struct in6_addr
*)b
);
1685 static inline bool xfrm_addr_equal(const xfrm_address_t
*a
,
1686 const xfrm_address_t
*b
,
1692 return ((__force u32
)a
->a4
^ (__force u32
)b
->a4
) == 0;
1694 return xfrm6_addr_equal(a
, b
);
1698 static inline int xfrm_policy_id2dir(u32 index
)
1704 static inline int xfrm_aevent_is_on(struct net
*net
)
1710 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1712 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1717 static inline int xfrm_acquire_is_on(struct net
*net
)
1723 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1725 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_ACQUIRE
);
1732 static inline int aead_len(struct xfrm_algo_aead
*alg
)
1734 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1737 static inline int xfrm_alg_len(const struct xfrm_algo
*alg
)
1739 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1742 static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth
*alg
)
1744 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1747 static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn
*replay_esn
)
1749 return sizeof(*replay_esn
) + replay_esn
->bmp_len
* sizeof(__u32
);
1752 #ifdef CONFIG_XFRM_MIGRATE
1753 static inline int xfrm_replay_clone(struct xfrm_state
*x
,
1754 struct xfrm_state
*orig
)
1756 x
->replay_esn
= kzalloc(xfrm_replay_state_esn_len(orig
->replay_esn
),
1761 x
->replay_esn
->bmp_len
= orig
->replay_esn
->bmp_len
;
1762 x
->replay_esn
->replay_window
= orig
->replay_esn
->replay_window
;
1764 x
->preplay_esn
= kmemdup(x
->replay_esn
,
1765 xfrm_replay_state_esn_len(x
->replay_esn
),
1767 if (!x
->preplay_esn
) {
1768 kfree(x
->replay_esn
);
1775 static inline struct xfrm_algo_aead
*xfrm_algo_aead_clone(struct xfrm_algo_aead
*orig
)
1777 return kmemdup(orig
, aead_len(orig
), GFP_KERNEL
);
1781 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1783 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1786 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1788 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1791 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1794 for (i
= 0; i
< n
; i
++)
1795 xfrm_state_put(*(states
+ i
));
1798 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1801 for (i
= 0; i
< n
; i
++)
1802 xfrm_state_delete(*(states
+ i
));
1807 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1809 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1811 static inline struct xfrm_offload
*xfrm_offload(struct sk_buff
*skb
)
1813 struct sec_path
*sp
= skb
->sp
;
1815 if (!sp
|| !sp
->olen
|| sp
->len
!= sp
->olen
)
1818 return &sp
->ovec
[sp
->olen
- 1];
1822 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1824 if (attrs
[XFRMA_MARK
])
1825 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1832 static inline int xfrm_mark_put(struct sk_buff
*skb
, const struct xfrm_mark
*m
)
1837 ret
= nla_put(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1841 static inline int xfrm_tunnel_check(struct sk_buff
*skb
, struct xfrm_state
*x
,
1842 unsigned int family
)
1844 bool tunnel
= false;
1848 if (XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip4
)
1852 if (XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip6
)
1856 if (tunnel
&& !(x
->outer_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
))
1861 #endif /* _NET_XFRM_H */