1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/compiler.h>
6 #include <linux/xfrm.h>
7 #include <linux/spinlock.h>
8 #include <linux/list.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/pfkeyv2.h>
12 #include <linux/ipsec.h>
13 #include <linux/in6.h>
14 #include <linux/mutex.h>
15 #include <linux/audit.h>
16 #include <linux/slab.h>
17 #include <linux/refcount.h>
22 #include <net/route.h>
24 #include <net/ip6_fib.h>
27 #include <linux/interrupt.h>
29 #ifdef CONFIG_XFRM_STATISTICS
33 #define XFRM_PROTO_ESP 50
34 #define XFRM_PROTO_AH 51
35 #define XFRM_PROTO_COMP 108
36 #define XFRM_PROTO_IPIP 4
37 #define XFRM_PROTO_IPV6 41
38 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
39 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
41 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
42 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
43 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
44 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
45 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
46 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
47 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
48 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
50 #ifdef CONFIG_XFRM_STATISTICS
51 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
53 #define XFRM_INC_STATS(net, field) ((void)(net))
57 /* Organization of SPD aka "XFRM rules"
58 ------------------------------------
61 - policy rule, struct xfrm_policy (=SPD entry)
62 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
63 - instance of a transformer, struct xfrm_state (=SA)
64 - template to clone xfrm_state, struct xfrm_tmpl
66 SPD is plain linear list of xfrm_policy rules, ordered by priority.
67 (To be compatible with existing pfkeyv2 implementations,
68 many rules with priority of 0x7fffffff are allowed to exist and
69 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71 Lookup is plain linear search until the first match with selector.
73 If "action" is "block", then we prohibit the flow, otherwise:
74 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
75 policy entry has list of up to XFRM_MAX_DEPTH transformations,
76 described by templates xfrm_tmpl. Each template is resolved
77 to a complete xfrm_state (see below) and we pack bundle of transformations
78 to a dst_entry returned to requestor.
80 dst -. xfrm .-> xfrm_state #1
81 |---. child .-> dst -. xfrm .-> xfrm_state #2
82 |---. child .-> dst -. xfrm .-> xfrm_state #3
85 Bundles are cached at xrfm_policy struct (field ->bundles).
88 Resolution of xrfm_tmpl
89 -----------------------
91 1. ->mode Mode: transport or tunnel
92 2. ->id.proto Protocol: AH/ESP/IPCOMP
93 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
94 Q: allow to resolve security gateway?
95 4. ->id.spi If not zero, static SPI.
96 5. ->saddr Local tunnel endpoint, ignored for transport mode.
97 6. ->algos List of allowed algos. Plain bitmask now.
98 Q: ealgos, aalgos, calgos. What a mess...
99 7. ->share Sharing mode.
100 Q: how to implement private sharing mode? To add struct sock* to
103 Having this template we search through SAD searching for entries
104 with appropriate mode/proto/algo, permitted by selector.
105 If no appropriate entry found, it is requested from key manager.
108 Q: How to find all the bundles referring to a physical path for
109 PMTU discovery? Seems, dst should contain list of all parents...
110 and enter to infinite locking hierarchy disaster.
111 No! It is easier, we will not search for them, let them find us.
112 We add genid to each dst plus pointer to genid of raw IP route,
113 pmtu disc will update pmtu on raw IP route and increase its genid.
114 dst_check() will see this for top level and trigger resyncing
115 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
118 struct xfrm_state_walk
{
119 struct list_head all
;
124 struct xfrm_address_filter
*filter
;
127 struct xfrm_state_offload
{
128 struct net_device
*dev
;
129 unsigned long offload_handle
;
130 unsigned int num_exthdrs
;
134 /* Full description of state of transformer. */
136 possible_net_t xs_net
;
138 struct hlist_node gclist
;
139 struct hlist_node bydst
;
141 struct hlist_node bysrc
;
142 struct hlist_node byspi
;
148 struct xfrm_selector sel
;
149 struct xfrm_mark mark
;
154 /* Key manager bits */
155 struct xfrm_state_walk km
;
157 /* Parameters of this state. */
162 u8 aalgo
, ealgo
, calgo
;
165 xfrm_address_t saddr
;
172 struct xfrm_lifetime_cfg lft
;
174 /* Data for transformer */
175 struct xfrm_algo_auth
*aalg
;
176 struct xfrm_algo
*ealg
;
177 struct xfrm_algo
*calg
;
178 struct xfrm_algo_aead
*aead
;
181 /* Data for encapsulator */
182 struct xfrm_encap_tmpl
*encap
;
184 /* Data for care-of address */
185 xfrm_address_t
*coaddr
;
187 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
188 struct xfrm_state
*tunnel
;
190 /* If a tunnel, number of users + 1 */
191 atomic_t tunnel_users
;
193 /* State for replay detection */
194 struct xfrm_replay_state replay
;
195 struct xfrm_replay_state_esn
*replay_esn
;
197 /* Replay detection state at the time we sent the last notification */
198 struct xfrm_replay_state preplay
;
199 struct xfrm_replay_state_esn
*preplay_esn
;
201 /* The functions for replay detection. */
202 const struct xfrm_replay
*repl
;
204 /* internal flag that only holds state for delayed aevent at the
209 /* Replay detection notification settings */
213 /* Replay detection notification timer */
214 struct timer_list rtimer
;
217 struct xfrm_stats stats
;
219 struct xfrm_lifetime_cur curlft
;
220 struct tasklet_hrtimer mtimer
;
222 struct xfrm_state_offload xso
;
224 /* used to fix curlft->add_time when changing date */
228 unsigned long lastused
;
230 struct page_frag xfrag
;
232 /* Reference to data common to all the instances of this
234 const struct xfrm_type
*type
;
235 struct xfrm_mode
*inner_mode
;
236 struct xfrm_mode
*inner_mode_iaf
;
237 struct xfrm_mode
*outer_mode
;
239 const struct xfrm_type_offload
*type_offload
;
241 /* Security context */
242 struct xfrm_sec_ctx
*security
;
244 /* Private data of this transformer, format is opaque,
245 * interpreted by xfrm_type methods. */
249 static inline struct net
*xs_net(struct xfrm_state
*x
)
251 return read_pnet(&x
->xs_net
);
254 /* xflags - make enum if more show up */
255 #define XFRM_TIME_DEFER 1
256 #define XFRM_SOFT_EXPIRE 2
267 /* callback structure passed from either netlink or pfkey */
284 void (*advance
)(struct xfrm_state
*x
, __be32 net_seq
);
285 int (*check
)(struct xfrm_state
*x
,
288 int (*recheck
)(struct xfrm_state
*x
,
291 void (*notify
)(struct xfrm_state
*x
, int event
);
292 int (*overflow
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
298 struct xfrm_policy_afinfo
{
299 struct dst_ops
*dst_ops
;
300 struct dst_entry
*(*dst_lookup
)(struct net
*net
,
302 const xfrm_address_t
*saddr
,
303 const xfrm_address_t
*daddr
,
305 int (*get_saddr
)(struct net
*net
, int oif
,
306 xfrm_address_t
*saddr
,
307 xfrm_address_t
*daddr
,
309 void (*decode_session
)(struct sk_buff
*skb
,
312 int (*get_tos
)(const struct flowi
*fl
);
313 int (*init_path
)(struct xfrm_dst
*path
,
314 struct dst_entry
*dst
,
316 int (*fill_dst
)(struct xfrm_dst
*xdst
,
317 struct net_device
*dev
,
318 const struct flowi
*fl
);
319 struct dst_entry
*(*blackhole_route
)(struct net
*net
, struct dst_entry
*orig
);
322 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo
*afinfo
, int family
);
323 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo
*afinfo
);
324 void km_policy_notify(struct xfrm_policy
*xp
, int dir
,
325 const struct km_event
*c
);
326 void km_state_notify(struct xfrm_state
*x
, const struct km_event
*c
);
329 int km_query(struct xfrm_state
*x
, struct xfrm_tmpl
*t
,
330 struct xfrm_policy
*pol
);
331 void km_state_expired(struct xfrm_state
*x
, int hard
, u32 portid
);
332 int __xfrm_state_delete(struct xfrm_state
*x
);
334 struct xfrm_state_afinfo
{
338 struct module
*owner
;
339 const struct xfrm_type
*type_map
[IPPROTO_MAX
];
340 const struct xfrm_type_offload
*type_offload_map
[IPPROTO_MAX
];
341 struct xfrm_mode
*mode_map
[XFRM_MODE_MAX
];
343 int (*init_flags
)(struct xfrm_state
*x
);
344 void (*init_tempsel
)(struct xfrm_selector
*sel
,
345 const struct flowi
*fl
);
346 void (*init_temprop
)(struct xfrm_state
*x
,
347 const struct xfrm_tmpl
*tmpl
,
348 const xfrm_address_t
*daddr
,
349 const xfrm_address_t
*saddr
);
350 int (*tmpl_sort
)(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
);
351 int (*state_sort
)(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
);
352 int (*output
)(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
353 int (*output_finish
)(struct sock
*sk
, struct sk_buff
*skb
);
354 int (*extract_input
)(struct xfrm_state
*x
,
355 struct sk_buff
*skb
);
356 int (*extract_output
)(struct xfrm_state
*x
,
357 struct sk_buff
*skb
);
358 int (*transport_finish
)(struct sk_buff
*skb
,
360 void (*local_error
)(struct sk_buff
*skb
, u32 mtu
);
363 int xfrm_state_register_afinfo(struct xfrm_state_afinfo
*afinfo
);
364 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo
*afinfo
);
365 struct xfrm_state_afinfo
*xfrm_state_get_afinfo(unsigned int family
);
366 struct xfrm_state_afinfo
*xfrm_state_afinfo_get_rcu(unsigned int family
);
368 struct xfrm_input_afinfo
{
370 int (*callback
)(struct sk_buff
*skb
, u8 protocol
,
374 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo
*afinfo
);
375 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo
*afinfo
);
377 void xfrm_state_delete_tunnel(struct xfrm_state
*x
);
381 struct module
*owner
;
384 #define XFRM_TYPE_NON_FRAGMENT 1
385 #define XFRM_TYPE_REPLAY_PROT 2
386 #define XFRM_TYPE_LOCAL_COADDR 4
387 #define XFRM_TYPE_REMOTE_COADDR 8
389 int (*init_state
)(struct xfrm_state
*x
);
390 void (*destructor
)(struct xfrm_state
*);
391 int (*input
)(struct xfrm_state
*, struct sk_buff
*skb
);
392 int (*output
)(struct xfrm_state
*, struct sk_buff
*pskb
);
393 int (*reject
)(struct xfrm_state
*, struct sk_buff
*,
394 const struct flowi
*);
395 int (*hdr_offset
)(struct xfrm_state
*, struct sk_buff
*, u8
**);
396 /* Estimate maximal size of result of transformation of a dgram */
397 u32 (*get_mtu
)(struct xfrm_state
*, int size
);
400 int xfrm_register_type(const struct xfrm_type
*type
, unsigned short family
);
401 int xfrm_unregister_type(const struct xfrm_type
*type
, unsigned short family
);
403 struct xfrm_type_offload
{
405 struct module
*owner
;
407 void (*encap
)(struct xfrm_state
*, struct sk_buff
*pskb
);
408 int (*input_tail
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
409 int (*xmit
)(struct xfrm_state
*, struct sk_buff
*pskb
, netdev_features_t features
);
412 int xfrm_register_type_offload(const struct xfrm_type_offload
*type
, unsigned short family
);
413 int xfrm_unregister_type_offload(const struct xfrm_type_offload
*type
, unsigned short family
);
417 * Remove encapsulation header.
419 * The IP header will be moved over the top of the encapsulation
422 * On entry, the transport header shall point to where the IP header
423 * should be and the network header shall be set to where the IP
424 * header currently is. skb->data shall point to the start of the
427 int (*input2
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
430 * This is the actual input entry point.
432 * For transport mode and equivalent this would be identical to
433 * input2 (which does not need to be set). While tunnel mode
434 * and equivalent would set this to the tunnel encapsulation function
435 * xfrm4_prepare_input that would in turn call input2.
437 int (*input
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
440 * Add encapsulation header.
442 * On exit, the transport header will be set to the start of the
443 * encapsulation header to be filled in by x->type->output and
444 * the mac header will be set to the nextheader (protocol for
445 * IPv4) field of the extension header directly preceding the
446 * encapsulation header, or in its absence, that of the top IP
447 * header. The value of the network header will always point
448 * to the top IP header while skb->data will point to the payload.
450 int (*output2
)(struct xfrm_state
*x
,struct sk_buff
*skb
);
453 * This is the actual output entry point.
455 * For transport mode and equivalent this would be identical to
456 * output2 (which does not need to be set). While tunnel mode
457 * and equivalent would set this to a tunnel encapsulation function
458 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
461 int (*output
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
464 * Adjust pointers into the packet and do GSO segmentation.
466 struct sk_buff
*(*gso_segment
)(struct xfrm_state
*x
, struct sk_buff
*skb
, netdev_features_t features
);
469 * Adjust pointers into the packet when IPsec is done at layer2.
471 void (*xmit
)(struct xfrm_state
*x
, struct sk_buff
*skb
);
473 struct xfrm_state_afinfo
*afinfo
;
474 struct module
*owner
;
479 /* Flags for xfrm_mode. */
481 XFRM_MODE_FLAG_TUNNEL
= 1,
484 int xfrm_register_mode(struct xfrm_mode
*mode
, int family
);
485 int xfrm_unregister_mode(struct xfrm_mode
*mode
, int family
);
487 static inline int xfrm_af2proto(unsigned int family
)
499 static inline struct xfrm_mode
*xfrm_ip2inner_mode(struct xfrm_state
*x
, int ipproto
)
501 if ((ipproto
== IPPROTO_IPIP
&& x
->props
.family
== AF_INET
) ||
502 (ipproto
== IPPROTO_IPV6
&& x
->props
.family
== AF_INET6
))
503 return x
->inner_mode
;
505 return x
->inner_mode_iaf
;
509 /* id in template is interpreted as:
510 * daddr - destination of tunnel, may be zero for transport mode.
511 * spi - zero to acquire spi. Not zero if spi is static, then
512 * daddr must be fixed too.
513 * proto - AH/ESP/IPCOMP
517 /* Source address of tunnel. Ignored, if it is not a tunnel. */
518 xfrm_address_t saddr
;
520 unsigned short encap_family
;
524 /* Mode: transport, tunnel etc. */
527 /* Sharing mode: unique, this session only, this user only etc. */
530 /* May skip this transfomration if no SA is found */
533 /* Skip aalgos/ealgos/calgos checks. */
536 /* Bit mask of algos allowed for acquisition */
542 #define XFRM_MAX_DEPTH 6
543 #define XFRM_MAX_OFFLOAD_DEPTH 1
545 struct xfrm_policy_walk_entry
{
546 struct list_head all
;
550 struct xfrm_policy_walk
{
551 struct xfrm_policy_walk_entry walk
;
556 struct xfrm_policy_queue
{
557 struct sk_buff_head hold_queue
;
558 struct timer_list hold_timer
;
559 unsigned long timeout
;
563 possible_net_t xp_net
;
564 struct hlist_node bydst
;
565 struct hlist_node byidx
;
567 /* This lock only affects elements except for entry. */
570 struct timer_list timer
;
575 struct xfrm_mark mark
;
576 struct xfrm_selector selector
;
577 struct xfrm_lifetime_cfg lft
;
578 struct xfrm_lifetime_cur curlft
;
579 struct xfrm_policy_walk_entry walk
;
580 struct xfrm_policy_queue polq
;
586 struct xfrm_sec_ctx
*security
;
587 struct xfrm_tmpl xfrm_vec
[XFRM_MAX_DEPTH
];
591 static inline struct net
*xp_net(const struct xfrm_policy
*xp
)
593 return read_pnet(&xp
->xp_net
);
596 struct xfrm_kmaddress
{
597 xfrm_address_t local
;
598 xfrm_address_t remote
;
603 struct xfrm_migrate
{
604 xfrm_address_t old_daddr
;
605 xfrm_address_t old_saddr
;
606 xfrm_address_t new_daddr
;
607 xfrm_address_t new_saddr
;
616 #define XFRM_KM_TIMEOUT 30
618 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
619 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
621 /* default aevent timeout in units of 100ms */
622 #define XFRM_AE_ETIME 10
623 /* Async Event timer multiplier */
624 #define XFRM_AE_ETH_M 10
625 /* default seq threshold size */
626 #define XFRM_AE_SEQT_SIZE 2
629 struct list_head list
;
630 int (*notify
)(struct xfrm_state
*x
, const struct km_event
*c
);
631 int (*acquire
)(struct xfrm_state
*x
, struct xfrm_tmpl
*, struct xfrm_policy
*xp
);
632 struct xfrm_policy
*(*compile_policy
)(struct sock
*sk
, int opt
, u8
*data
, int len
, int *dir
);
633 int (*new_mapping
)(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
634 int (*notify_policy
)(struct xfrm_policy
*x
, int dir
, const struct km_event
*c
);
635 int (*report
)(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
, xfrm_address_t
*addr
);
636 int (*migrate
)(const struct xfrm_selector
*sel
,
638 const struct xfrm_migrate
*m
,
640 const struct xfrm_kmaddress
*k
,
641 const struct xfrm_encap_tmpl
*encap
);
642 bool (*is_alive
)(const struct km_event
*c
);
645 int xfrm_register_km(struct xfrm_mgr
*km
);
646 int xfrm_unregister_km(struct xfrm_mgr
*km
);
648 struct xfrm_tunnel_skb_cb
{
650 struct inet_skb_parm h4
;
651 struct inet6_skb_parm h6
;
655 struct ip_tunnel
*ip4
;
660 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
663 * This structure is used for the duration where packets are being
664 * transformed by IPsec. As soon as the packet leaves IPsec the
665 * area beyond the generic IP part may be overwritten.
668 struct xfrm_tunnel_skb_cb header
;
670 /* Sequence number for replay protection. */
683 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
686 * This structure is used by the afinfo prepare_input/prepare_output functions
687 * to transmit header information to the mode input/output functions.
689 struct xfrm_mode_skb_cb
{
690 struct xfrm_tunnel_skb_cb header
;
692 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
696 /* IP header length (excluding options or extension headers). */
699 /* TOS for IPv4, class for IPv6. */
702 /* TTL for IPv4, hop limitfor IPv6. */
705 /* Protocol for IPv4, NH for IPv6. */
708 /* Option length for IPv4, zero for IPv6. */
711 /* Used by IPv6 only, zero for IPv4. */
715 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
718 * This structure is used by the input processing to locate the SPI and
719 * related information.
721 struct xfrm_spi_skb_cb
{
722 struct xfrm_tunnel_skb_cb header
;
724 unsigned int daddroff
;
729 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
731 #ifdef CONFIG_AUDITSYSCALL
732 static inline struct audit_buffer
*xfrm_audit_start(const char *op
)
734 struct audit_buffer
*audit_buf
= NULL
;
736 if (audit_enabled
== 0)
738 audit_buf
= audit_log_start(current
->audit_context
, GFP_ATOMIC
,
739 AUDIT_MAC_IPSEC_EVENT
);
740 if (audit_buf
== NULL
)
742 audit_log_format(audit_buf
, "op=%s", op
);
746 static inline void xfrm_audit_helper_usrinfo(bool task_valid
,
747 struct audit_buffer
*audit_buf
)
749 const unsigned int auid
= from_kuid(&init_user_ns
, task_valid
?
750 audit_get_loginuid(current
) :
752 const unsigned int ses
= task_valid
? audit_get_sessionid(current
) :
755 audit_log_format(audit_buf
, " auid=%u ses=%u", auid
, ses
);
756 audit_log_task_context(audit_buf
);
759 void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
, bool task_valid
);
760 void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
762 void xfrm_audit_state_add(struct xfrm_state
*x
, int result
, bool task_valid
);
763 void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
, bool task_valid
);
764 void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
765 struct sk_buff
*skb
);
766 void xfrm_audit_state_replay(struct xfrm_state
*x
, struct sk_buff
*skb
,
768 void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
, u16 family
);
769 void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
, __be32 net_spi
,
771 void xfrm_audit_state_icvfail(struct xfrm_state
*x
, struct sk_buff
*skb
,
775 static inline void xfrm_audit_policy_add(struct xfrm_policy
*xp
, int result
,
780 static inline void xfrm_audit_policy_delete(struct xfrm_policy
*xp
, int result
,
785 static inline void xfrm_audit_state_add(struct xfrm_state
*x
, int result
,
790 static inline void xfrm_audit_state_delete(struct xfrm_state
*x
, int result
,
795 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state
*x
,
800 static inline void xfrm_audit_state_replay(struct xfrm_state
*x
,
801 struct sk_buff
*skb
, __be32 net_seq
)
805 static inline void xfrm_audit_state_notfound_simple(struct sk_buff
*skb
,
810 static inline void xfrm_audit_state_notfound(struct sk_buff
*skb
, u16 family
,
811 __be32 net_spi
, __be32 net_seq
)
815 static inline void xfrm_audit_state_icvfail(struct xfrm_state
*x
,
816 struct sk_buff
*skb
, u8 proto
)
819 #endif /* CONFIG_AUDITSYSCALL */
821 static inline void xfrm_pol_hold(struct xfrm_policy
*policy
)
823 if (likely(policy
!= NULL
))
824 refcount_inc(&policy
->refcnt
);
827 void xfrm_policy_destroy(struct xfrm_policy
*policy
);
829 static inline void xfrm_pol_put(struct xfrm_policy
*policy
)
831 if (refcount_dec_and_test(&policy
->refcnt
))
832 xfrm_policy_destroy(policy
);
835 static inline void xfrm_pols_put(struct xfrm_policy
**pols
, int npols
)
838 for (i
= npols
- 1; i
>= 0; --i
)
839 xfrm_pol_put(pols
[i
]);
842 void __xfrm_state_destroy(struct xfrm_state
*);
844 static inline void __xfrm_state_put(struct xfrm_state
*x
)
846 refcount_dec(&x
->refcnt
);
849 static inline void xfrm_state_put(struct xfrm_state
*x
)
851 if (refcount_dec_and_test(&x
->refcnt
))
852 __xfrm_state_destroy(x
);
855 static inline void xfrm_state_hold(struct xfrm_state
*x
)
857 refcount_inc(&x
->refcnt
);
860 static inline bool addr_match(const void *token1
, const void *token2
,
861 unsigned int prefixlen
)
863 const __be32
*a1
= token1
;
864 const __be32
*a2
= token2
;
868 pdw
= prefixlen
>> 5; /* num of whole u32 in prefix */
869 pbi
= prefixlen
& 0x1f; /* num of bits in incomplete u32 in prefix */
872 if (memcmp(a1
, a2
, pdw
<< 2))
878 mask
= htonl((0xffffffff) << (32 - pbi
));
880 if ((a1
[pdw
] ^ a2
[pdw
]) & mask
)
887 static inline bool addr4_match(__be32 a1
, __be32 a2
, u8 prefixlen
)
889 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
890 if (sizeof(long) == 4 && prefixlen
== 0)
892 return !((a1
^ a2
) & htonl(~0UL << (32 - prefixlen
)));
896 __be16
xfrm_flowi_sport(const struct flowi
*fl
, const union flowi_uli
*uli
)
899 switch(fl
->flowi_proto
) {
902 case IPPROTO_UDPLITE
:
904 port
= uli
->ports
.sport
;
908 port
= htons(uli
->icmpt
.type
);
911 port
= htons(uli
->mht
.type
);
914 port
= htons(ntohl(uli
->gre_key
) >> 16);
923 __be16
xfrm_flowi_dport(const struct flowi
*fl
, const union flowi_uli
*uli
)
926 switch(fl
->flowi_proto
) {
929 case IPPROTO_UDPLITE
:
931 port
= uli
->ports
.dport
;
935 port
= htons(uli
->icmpt
.code
);
938 port
= htons(ntohl(uli
->gre_key
) & 0xffff);
946 bool xfrm_selector_match(const struct xfrm_selector
*sel
,
947 const struct flowi
*fl
, unsigned short family
);
949 #ifdef CONFIG_SECURITY_NETWORK_XFRM
950 /* If neither has a context --> match
951 * Otherwise, both must have a context and the sids, doi, alg must match
953 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
955 return ((!s1
&& !s2
) ||
957 (s1
->ctx_sid
== s2
->ctx_sid
) &&
958 (s1
->ctx_doi
== s2
->ctx_doi
) &&
959 (s1
->ctx_alg
== s2
->ctx_alg
)));
962 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx
*s1
, struct xfrm_sec_ctx
*s2
)
968 /* A struct encoding bundle of transformations to apply to some set of flow.
970 * dst->child points to the next element of bundle.
971 * dst->xfrm points to an instanse of transformer.
973 * Due to unfortunate limitations of current routing cache, which we
974 * have no time to fix, it mirrors struct rtable and bound to the same
975 * routing key, including saddr,daddr. However, we can have many of
976 * bundles differing by session id. All the bundles grow from a parent
981 struct dst_entry dst
;
985 struct dst_entry
*route
;
986 struct xfrm_policy
*pols
[XFRM_POLICY_TYPE_MAX
];
987 int num_pols
, num_xfrms
;
990 u32 route_mtu_cached
;
991 u32 child_mtu_cached
;
997 static inline void xfrm_dst_destroy(struct xfrm_dst
*xdst
)
999 xfrm_pols_put(xdst
->pols
, xdst
->num_pols
);
1000 dst_release(xdst
->route
);
1001 if (likely(xdst
->u
.dst
.xfrm
))
1002 xfrm_state_put(xdst
->u
.dst
.xfrm
);
1006 void xfrm_dst_ifdown(struct dst_entry
*dst
, struct net_device
*dev
);
1008 struct xfrm_offload
{
1009 /* Output sequence number for replay protection on offloading. */
1016 #define SA_DELETE_REQ 1
1017 #define CRYPTO_DONE 2
1018 #define CRYPTO_NEXT_DONE 4
1019 #define CRYPTO_FALLBACK 8
1020 #define XFRM_GSO_SEGMENT 16
1022 #define XFRM_ESP_NO_TRAILER 64
1025 #define CRYPTO_SUCCESS 1
1026 #define CRYPTO_GENERIC_ERROR 2
1027 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1028 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1029 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1030 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1031 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1032 #define CRYPTO_INVALID_PROTOCOL 128
1042 struct xfrm_state
*xvec
[XFRM_MAX_DEPTH
];
1043 struct xfrm_offload ovec
[XFRM_MAX_OFFLOAD_DEPTH
];
1046 static inline int secpath_exists(struct sk_buff
*skb
)
1049 return skb
->sp
!= NULL
;
1055 static inline struct sec_path
*
1056 secpath_get(struct sec_path
*sp
)
1059 refcount_inc(&sp
->refcnt
);
1063 void __secpath_destroy(struct sec_path
*sp
);
1066 secpath_put(struct sec_path
*sp
)
1068 if (sp
&& refcount_dec_and_test(&sp
->refcnt
))
1069 __secpath_destroy(sp
);
1072 struct sec_path
*secpath_dup(struct sec_path
*src
);
1073 int secpath_set(struct sk_buff
*skb
);
1076 secpath_reset(struct sk_buff
*skb
)
1079 secpath_put(skb
->sp
);
1085 xfrm_addr_any(const xfrm_address_t
*addr
, unsigned short family
)
1089 return addr
->a4
== 0;
1091 return ipv6_addr_any(&addr
->in6
);
1097 __xfrm4_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1099 return (tmpl
->saddr
.a4
&&
1100 tmpl
->saddr
.a4
!= x
->props
.saddr
.a4
);
1104 __xfrm6_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
)
1106 return (!ipv6_addr_any((struct in6_addr
*)&tmpl
->saddr
) &&
1107 !ipv6_addr_equal((struct in6_addr
*)&tmpl
->saddr
, (struct in6_addr
*)&x
->props
.saddr
));
1111 xfrm_state_addr_cmp(const struct xfrm_tmpl
*tmpl
, const struct xfrm_state
*x
, unsigned short family
)
1115 return __xfrm4_state_addr_cmp(tmpl
, x
);
1117 return __xfrm6_state_addr_cmp(tmpl
, x
);
1123 int __xfrm_policy_check(struct sock
*, int dir
, struct sk_buff
*skb
,
1124 unsigned short family
);
1126 static inline int __xfrm_policy_check2(struct sock
*sk
, int dir
,
1127 struct sk_buff
*skb
,
1128 unsigned int family
, int reverse
)
1130 struct net
*net
= dev_net(skb
->dev
);
1131 int ndir
= dir
| (reverse
? XFRM_POLICY_MASK
+ 1 : 0);
1133 if (sk
&& sk
->sk_policy
[XFRM_POLICY_IN
])
1134 return __xfrm_policy_check(sk
, ndir
, skb
, family
);
1136 return (!net
->xfrm
.policy_count
[dir
] && !skb
->sp
) ||
1137 (skb_dst(skb
)->flags
& DST_NOPOLICY
) ||
1138 __xfrm_policy_check(sk
, ndir
, skb
, family
);
1141 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1143 return __xfrm_policy_check2(sk
, dir
, skb
, family
, 0);
1146 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1148 return xfrm_policy_check(sk
, dir
, skb
, AF_INET
);
1151 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1153 return xfrm_policy_check(sk
, dir
, skb
, AF_INET6
);
1156 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1157 struct sk_buff
*skb
)
1159 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET
, 1);
1162 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1163 struct sk_buff
*skb
)
1165 return __xfrm_policy_check2(sk
, dir
, skb
, AF_INET6
, 1);
1168 int __xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1169 unsigned int family
, int reverse
);
1171 static inline int xfrm_decode_session(struct sk_buff
*skb
, struct flowi
*fl
,
1172 unsigned int family
)
1174 return __xfrm_decode_session(skb
, fl
, family
, 0);
1177 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1179 unsigned int family
)
1181 return __xfrm_decode_session(skb
, fl
, family
, 1);
1184 int __xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
);
1186 static inline int xfrm_route_forward(struct sk_buff
*skb
, unsigned short family
)
1188 struct net
*net
= dev_net(skb
->dev
);
1190 return !net
->xfrm
.policy_count
[XFRM_POLICY_OUT
] ||
1191 (skb_dst(skb
)->flags
& DST_NOXFRM
) ||
1192 __xfrm_route_forward(skb
, family
);
1195 static inline int xfrm4_route_forward(struct sk_buff
*skb
)
1197 return xfrm_route_forward(skb
, AF_INET
);
1200 static inline int xfrm6_route_forward(struct sk_buff
*skb
)
1202 return xfrm_route_forward(skb
, AF_INET6
);
1205 int __xfrm_sk_clone_policy(struct sock
*sk
, const struct sock
*osk
);
1207 static inline int xfrm_sk_clone_policy(struct sock
*sk
, const struct sock
*osk
)
1209 sk
->sk_policy
[0] = NULL
;
1210 sk
->sk_policy
[1] = NULL
;
1211 if (unlikely(osk
->sk_policy
[0] || osk
->sk_policy
[1]))
1212 return __xfrm_sk_clone_policy(sk
, osk
);
1216 int xfrm_policy_delete(struct xfrm_policy
*pol
, int dir
);
1218 static inline void xfrm_sk_free_policy(struct sock
*sk
)
1220 struct xfrm_policy
*pol
;
1222 pol
= rcu_dereference_protected(sk
->sk_policy
[0], 1);
1223 if (unlikely(pol
!= NULL
)) {
1224 xfrm_policy_delete(pol
, XFRM_POLICY_MAX
);
1225 sk
->sk_policy
[0] = NULL
;
1227 pol
= rcu_dereference_protected(sk
->sk_policy
[1], 1);
1228 if (unlikely(pol
!= NULL
)) {
1229 xfrm_policy_delete(pol
, XFRM_POLICY_MAX
+1);
1230 sk
->sk_policy
[1] = NULL
;
1236 static inline void xfrm_sk_free_policy(struct sock
*sk
) {}
1237 static inline int xfrm_sk_clone_policy(struct sock
*sk
, const struct sock
*osk
) { return 0; }
1238 static inline int xfrm6_route_forward(struct sk_buff
*skb
) { return 1; }
1239 static inline int xfrm4_route_forward(struct sk_buff
*skb
) { return 1; }
1240 static inline int xfrm6_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1244 static inline int xfrm4_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
)
1248 static inline int xfrm_policy_check(struct sock
*sk
, int dir
, struct sk_buff
*skb
, unsigned short family
)
1252 static inline int xfrm_decode_session_reverse(struct sk_buff
*skb
,
1254 unsigned int family
)
1258 static inline int xfrm4_policy_check_reverse(struct sock
*sk
, int dir
,
1259 struct sk_buff
*skb
)
1263 static inline int xfrm6_policy_check_reverse(struct sock
*sk
, int dir
,
1264 struct sk_buff
*skb
)
1271 xfrm_address_t
*xfrm_flowi_daddr(const struct flowi
*fl
, unsigned short family
)
1275 return (xfrm_address_t
*)&fl
->u
.ip4
.daddr
;
1277 return (xfrm_address_t
*)&fl
->u
.ip6
.daddr
;
1283 xfrm_address_t
*xfrm_flowi_saddr(const struct flowi
*fl
, unsigned short family
)
1287 return (xfrm_address_t
*)&fl
->u
.ip4
.saddr
;
1289 return (xfrm_address_t
*)&fl
->u
.ip6
.saddr
;
1295 void xfrm_flowi_addr_get(const struct flowi
*fl
,
1296 xfrm_address_t
*saddr
, xfrm_address_t
*daddr
,
1297 unsigned short family
)
1301 memcpy(&saddr
->a4
, &fl
->u
.ip4
.saddr
, sizeof(saddr
->a4
));
1302 memcpy(&daddr
->a4
, &fl
->u
.ip4
.daddr
, sizeof(daddr
->a4
));
1305 saddr
->in6
= fl
->u
.ip6
.saddr
;
1306 daddr
->in6
= fl
->u
.ip6
.daddr
;
1311 static __inline__
int
1312 __xfrm4_state_addr_check(const struct xfrm_state
*x
,
1313 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1315 if (daddr
->a4
== x
->id
.daddr
.a4
&&
1316 (saddr
->a4
== x
->props
.saddr
.a4
|| !saddr
->a4
|| !x
->props
.saddr
.a4
))
1321 static __inline__
int
1322 __xfrm6_state_addr_check(const struct xfrm_state
*x
,
1323 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
)
1325 if (ipv6_addr_equal((struct in6_addr
*)daddr
, (struct in6_addr
*)&x
->id
.daddr
) &&
1326 (ipv6_addr_equal((struct in6_addr
*)saddr
, (struct in6_addr
*)&x
->props
.saddr
) ||
1327 ipv6_addr_any((struct in6_addr
*)saddr
) ||
1328 ipv6_addr_any((struct in6_addr
*)&x
->props
.saddr
)))
1333 static __inline__
int
1334 xfrm_state_addr_check(const struct xfrm_state
*x
,
1335 const xfrm_address_t
*daddr
, const xfrm_address_t
*saddr
,
1336 unsigned short family
)
1340 return __xfrm4_state_addr_check(x
, daddr
, saddr
);
1342 return __xfrm6_state_addr_check(x
, daddr
, saddr
);
1347 static __inline__
int
1348 xfrm_state_addr_flow_check(const struct xfrm_state
*x
, const struct flowi
*fl
,
1349 unsigned short family
)
1353 return __xfrm4_state_addr_check(x
,
1354 (const xfrm_address_t
*)&fl
->u
.ip4
.daddr
,
1355 (const xfrm_address_t
*)&fl
->u
.ip4
.saddr
);
1357 return __xfrm6_state_addr_check(x
,
1358 (const xfrm_address_t
*)&fl
->u
.ip6
.daddr
,
1359 (const xfrm_address_t
*)&fl
->u
.ip6
.saddr
);
1364 static inline int xfrm_state_kern(const struct xfrm_state
*x
)
1366 return atomic_read(&x
->tunnel_users
);
1369 static inline bool xfrm_id_proto_valid(u8 proto
)
1375 #if IS_ENABLED(CONFIG_IPV6)
1376 case IPPROTO_ROUTING
:
1377 case IPPROTO_DSTOPTS
:
1385 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1386 static inline int xfrm_id_proto_match(u8 proto
, u8 userproto
)
1388 return (!userproto
|| proto
== userproto
||
1389 (userproto
== IPSEC_PROTO_ANY
&& (proto
== IPPROTO_AH
||
1390 proto
== IPPROTO_ESP
||
1391 proto
== IPPROTO_COMP
)));
1395 * xfrm algorithm information
1397 struct xfrm_algo_aead_info
{
1402 struct xfrm_algo_auth_info
{
1407 struct xfrm_algo_encr_info
{
1413 struct xfrm_algo_comp_info
{
1417 struct xfrm_algo_desc
{
1421 u8 pfkey_supported
:1;
1423 struct xfrm_algo_aead_info aead
;
1424 struct xfrm_algo_auth_info auth
;
1425 struct xfrm_algo_encr_info encr
;
1426 struct xfrm_algo_comp_info comp
;
1428 struct sadb_alg desc
;
1431 /* XFRM protocol handlers. */
1432 struct xfrm4_protocol
{
1433 int (*handler
)(struct sk_buff
*skb
);
1434 int (*input_handler
)(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1436 int (*cb_handler
)(struct sk_buff
*skb
, int err
);
1437 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1439 struct xfrm4_protocol __rcu
*next
;
1443 struct xfrm6_protocol
{
1444 int (*handler
)(struct sk_buff
*skb
);
1445 int (*cb_handler
)(struct sk_buff
*skb
, int err
);
1446 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1447 u8 type
, u8 code
, int offset
, __be32 info
);
1449 struct xfrm6_protocol __rcu
*next
;
1453 /* XFRM tunnel handlers. */
1454 struct xfrm_tunnel
{
1455 int (*handler
)(struct sk_buff
*skb
);
1456 int (*err_handler
)(struct sk_buff
*skb
, u32 info
);
1458 struct xfrm_tunnel __rcu
*next
;
1462 struct xfrm6_tunnel
{
1463 int (*handler
)(struct sk_buff
*skb
);
1464 int (*err_handler
)(struct sk_buff
*skb
, struct inet6_skb_parm
*opt
,
1465 u8 type
, u8 code
, int offset
, __be32 info
);
1466 struct xfrm6_tunnel __rcu
*next
;
1470 void xfrm_init(void);
1471 void xfrm4_init(void);
1472 int xfrm_state_init(struct net
*net
);
1473 void xfrm_state_fini(struct net
*net
);
1474 void xfrm4_state_init(void);
1475 void xfrm4_protocol_init(void);
1477 int xfrm6_init(void);
1478 void xfrm6_fini(void);
1479 int xfrm6_state_init(void);
1480 void xfrm6_state_fini(void);
1481 int xfrm6_protocol_init(void);
1482 void xfrm6_protocol_fini(void);
1484 static inline int xfrm6_init(void)
1488 static inline void xfrm6_fini(void)
1494 #ifdef CONFIG_XFRM_STATISTICS
1495 int xfrm_proc_init(struct net
*net
);
1496 void xfrm_proc_fini(struct net
*net
);
1499 int xfrm_sysctl_init(struct net
*net
);
1500 #ifdef CONFIG_SYSCTL
1501 void xfrm_sysctl_fini(struct net
*net
);
1503 static inline void xfrm_sysctl_fini(struct net
*net
)
1508 void xfrm_state_walk_init(struct xfrm_state_walk
*walk
, u8 proto
,
1509 struct xfrm_address_filter
*filter
);
1510 int xfrm_state_walk(struct net
*net
, struct xfrm_state_walk
*walk
,
1511 int (*func
)(struct xfrm_state
*, int, void*), void *);
1512 void xfrm_state_walk_done(struct xfrm_state_walk
*walk
, struct net
*net
);
1513 struct xfrm_state
*xfrm_state_alloc(struct net
*net
);
1514 struct xfrm_state
*xfrm_state_find(const xfrm_address_t
*daddr
,
1515 const xfrm_address_t
*saddr
,
1516 const struct flowi
*fl
,
1517 struct xfrm_tmpl
*tmpl
,
1518 struct xfrm_policy
*pol
, int *err
,
1519 unsigned short family
);
1520 struct xfrm_state
*xfrm_stateonly_find(struct net
*net
, u32 mark
,
1521 xfrm_address_t
*daddr
,
1522 xfrm_address_t
*saddr
,
1523 unsigned short family
,
1524 u8 mode
, u8 proto
, u32 reqid
);
1525 struct xfrm_state
*xfrm_state_lookup_byspi(struct net
*net
, __be32 spi
,
1526 unsigned short family
);
1527 int xfrm_state_check_expire(struct xfrm_state
*x
);
1528 void xfrm_state_insert(struct xfrm_state
*x
);
1529 int xfrm_state_add(struct xfrm_state
*x
);
1530 int xfrm_state_update(struct xfrm_state
*x
);
1531 struct xfrm_state
*xfrm_state_lookup(struct net
*net
, u32 mark
,
1532 const xfrm_address_t
*daddr
, __be32 spi
,
1533 u8 proto
, unsigned short family
);
1534 struct xfrm_state
*xfrm_state_lookup_byaddr(struct net
*net
, u32 mark
,
1535 const xfrm_address_t
*daddr
,
1536 const xfrm_address_t
*saddr
,
1538 unsigned short family
);
1539 #ifdef CONFIG_XFRM_SUB_POLICY
1540 int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
, int n
,
1541 unsigned short family
, struct net
*net
);
1542 int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
, int n
,
1543 unsigned short family
);
1545 static inline int xfrm_tmpl_sort(struct xfrm_tmpl
**dst
, struct xfrm_tmpl
**src
,
1546 int n
, unsigned short family
, struct net
*net
)
1551 static inline int xfrm_state_sort(struct xfrm_state
**dst
, struct xfrm_state
**src
,
1552 int n
, unsigned short family
)
1558 struct xfrmk_sadinfo
{
1559 u32 sadhcnt
; /* current hash bkts */
1560 u32 sadhmcnt
; /* max allowed hash bkts */
1561 u32 sadcnt
; /* current running count */
1564 struct xfrmk_spdinfo
{
1575 struct xfrm_state
*xfrm_find_acq_byseq(struct net
*net
, u32 mark
, u32 seq
);
1576 int xfrm_state_delete(struct xfrm_state
*x
);
1577 int xfrm_state_flush(struct net
*net
, u8 proto
, bool task_valid
);
1578 int xfrm_dev_state_flush(struct net
*net
, struct net_device
*dev
, bool task_valid
);
1579 void xfrm_sad_getinfo(struct net
*net
, struct xfrmk_sadinfo
*si
);
1580 void xfrm_spd_getinfo(struct net
*net
, struct xfrmk_spdinfo
*si
);
1581 u32
xfrm_replay_seqhi(struct xfrm_state
*x
, __be32 net_seq
);
1582 int xfrm_init_replay(struct xfrm_state
*x
);
1583 int xfrm_state_mtu(struct xfrm_state
*x
, int mtu
);
1584 int __xfrm_init_state(struct xfrm_state
*x
, bool init_replay
, bool offload
);
1585 int xfrm_init_state(struct xfrm_state
*x
);
1586 int xfrm_prepare_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1587 int xfrm_input(struct sk_buff
*skb
, int nexthdr
, __be32 spi
, int encap_type
);
1588 int xfrm_input_resume(struct sk_buff
*skb
, int nexthdr
);
1589 int xfrm_trans_queue(struct sk_buff
*skb
,
1590 int (*finish
)(struct net
*, struct sock
*,
1592 int xfrm_output_resume(struct sk_buff
*skb
, int err
);
1593 int xfrm_output(struct sock
*sk
, struct sk_buff
*skb
);
1594 int xfrm_inner_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1595 void xfrm_local_error(struct sk_buff
*skb
, int mtu
);
1596 int xfrm4_extract_header(struct sk_buff
*skb
);
1597 int xfrm4_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1598 int xfrm4_rcv_encap(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1600 int xfrm4_transport_finish(struct sk_buff
*skb
, int async
);
1601 int xfrm4_rcv(struct sk_buff
*skb
);
1602 int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1604 static inline int xfrm4_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
)
1606 XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip4
= NULL
;
1607 XFRM_SPI_SKB_CB(skb
)->family
= AF_INET
;
1608 XFRM_SPI_SKB_CB(skb
)->daddroff
= offsetof(struct iphdr
, daddr
);
1609 return xfrm_input(skb
, nexthdr
, spi
, 0);
1612 int xfrm4_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1613 int xfrm4_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1614 int xfrm4_output(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
1615 int xfrm4_output_finish(struct sock
*sk
, struct sk_buff
*skb
);
1616 int xfrm4_rcv_cb(struct sk_buff
*skb
, u8 protocol
, int err
);
1617 int xfrm4_protocol_register(struct xfrm4_protocol
*handler
, unsigned char protocol
);
1618 int xfrm4_protocol_deregister(struct xfrm4_protocol
*handler
, unsigned char protocol
);
1619 int xfrm4_tunnel_register(struct xfrm_tunnel
*handler
, unsigned short family
);
1620 int xfrm4_tunnel_deregister(struct xfrm_tunnel
*handler
, unsigned short family
);
1621 void xfrm4_local_error(struct sk_buff
*skb
, u32 mtu
);
1622 int xfrm6_extract_header(struct sk_buff
*skb
);
1623 int xfrm6_extract_input(struct xfrm_state
*x
, struct sk_buff
*skb
);
1624 int xfrm6_rcv_spi(struct sk_buff
*skb
, int nexthdr
, __be32 spi
,
1626 int xfrm6_transport_finish(struct sk_buff
*skb
, int async
);
1627 int xfrm6_rcv_tnl(struct sk_buff
*skb
, struct ip6_tnl
*t
);
1628 int xfrm6_rcv(struct sk_buff
*skb
);
1629 int xfrm6_input_addr(struct sk_buff
*skb
, xfrm_address_t
*daddr
,
1630 xfrm_address_t
*saddr
, u8 proto
);
1631 void xfrm6_local_error(struct sk_buff
*skb
, u32 mtu
);
1632 int xfrm6_rcv_cb(struct sk_buff
*skb
, u8 protocol
, int err
);
1633 int xfrm6_protocol_register(struct xfrm6_protocol
*handler
, unsigned char protocol
);
1634 int xfrm6_protocol_deregister(struct xfrm6_protocol
*handler
, unsigned char protocol
);
1635 int xfrm6_tunnel_register(struct xfrm6_tunnel
*handler
, unsigned short family
);
1636 int xfrm6_tunnel_deregister(struct xfrm6_tunnel
*handler
, unsigned short family
);
1637 __be32
xfrm6_tunnel_alloc_spi(struct net
*net
, xfrm_address_t
*saddr
);
1638 __be32
xfrm6_tunnel_spi_lookup(struct net
*net
, const xfrm_address_t
*saddr
);
1639 int xfrm6_extract_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1640 int xfrm6_prepare_output(struct xfrm_state
*x
, struct sk_buff
*skb
);
1641 int xfrm6_output(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
1642 int xfrm6_output_finish(struct sock
*sk
, struct sk_buff
*skb
);
1643 int xfrm6_find_1stfragopt(struct xfrm_state
*x
, struct sk_buff
*skb
,
1647 int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
);
1648 int xfrm_user_policy(struct sock
*sk
, int optname
,
1649 u8 __user
*optval
, int optlen
);
1651 static inline int xfrm_user_policy(struct sock
*sk
, int optname
, u8 __user
*optval
, int optlen
)
1653 return -ENOPROTOOPT
;
1656 static inline int xfrm4_udp_encap_rcv(struct sock
*sk
, struct sk_buff
*skb
)
1658 /* should not happen */
1664 struct dst_entry
*__xfrm_dst_lookup(struct net
*net
, int tos
, int oif
,
1665 const xfrm_address_t
*saddr
,
1666 const xfrm_address_t
*daddr
,
1667 int family
, u32 mark
);
1669 struct xfrm_policy
*xfrm_policy_alloc(struct net
*net
, gfp_t gfp
);
1671 void xfrm_policy_walk_init(struct xfrm_policy_walk
*walk
, u8 type
);
1672 int xfrm_policy_walk(struct net
*net
, struct xfrm_policy_walk
*walk
,
1673 int (*func
)(struct xfrm_policy
*, int, int, void*),
1675 void xfrm_policy_walk_done(struct xfrm_policy_walk
*walk
, struct net
*net
);
1676 int xfrm_policy_insert(int dir
, struct xfrm_policy
*policy
, int excl
);
1677 struct xfrm_policy
*xfrm_policy_bysel_ctx(struct net
*net
, u32 mark
,
1679 struct xfrm_selector
*sel
,
1680 struct xfrm_sec_ctx
*ctx
, int delete,
1682 struct xfrm_policy
*xfrm_policy_byid(struct net
*net
, u32 mark
, u8
, int dir
,
1683 u32 id
, int delete, int *err
);
1684 int xfrm_policy_flush(struct net
*net
, u8 type
, bool task_valid
);
1685 void xfrm_policy_hash_rebuild(struct net
*net
);
1686 u32
xfrm_get_acqseq(void);
1687 int verify_spi_info(u8 proto
, u32 min
, u32 max
);
1688 int xfrm_alloc_spi(struct xfrm_state
*x
, u32 minspi
, u32 maxspi
);
1689 struct xfrm_state
*xfrm_find_acq(struct net
*net
, const struct xfrm_mark
*mark
,
1690 u8 mode
, u32 reqid
, u8 proto
,
1691 const xfrm_address_t
*daddr
,
1692 const xfrm_address_t
*saddr
, int create
,
1693 unsigned short family
);
1694 int xfrm_sk_policy_insert(struct sock
*sk
, int dir
, struct xfrm_policy
*pol
);
1696 #ifdef CONFIG_XFRM_MIGRATE
1697 int km_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1698 const struct xfrm_migrate
*m
, int num_bundles
,
1699 const struct xfrm_kmaddress
*k
,
1700 const struct xfrm_encap_tmpl
*encap
);
1701 struct xfrm_state
*xfrm_migrate_state_find(struct xfrm_migrate
*m
, struct net
*net
);
1702 struct xfrm_state
*xfrm_state_migrate(struct xfrm_state
*x
,
1703 struct xfrm_migrate
*m
,
1704 struct xfrm_encap_tmpl
*encap
);
1705 int xfrm_migrate(const struct xfrm_selector
*sel
, u8 dir
, u8 type
,
1706 struct xfrm_migrate
*m
, int num_bundles
,
1707 struct xfrm_kmaddress
*k
, struct net
*net
,
1708 struct xfrm_encap_tmpl
*encap
);
1711 int km_new_mapping(struct xfrm_state
*x
, xfrm_address_t
*ipaddr
, __be16 sport
);
1712 void km_policy_expired(struct xfrm_policy
*pol
, int dir
, int hard
, u32 portid
);
1713 int km_report(struct net
*net
, u8 proto
, struct xfrm_selector
*sel
,
1714 xfrm_address_t
*addr
);
1716 void xfrm_input_init(void);
1717 int xfrm_parse_spi(struct sk_buff
*skb
, u8 nexthdr
, __be32
*spi
, __be32
*seq
);
1719 void xfrm_probe_algs(void);
1720 int xfrm_count_pfkey_auth_supported(void);
1721 int xfrm_count_pfkey_enc_supported(void);
1722 struct xfrm_algo_desc
*xfrm_aalg_get_byidx(unsigned int idx
);
1723 struct xfrm_algo_desc
*xfrm_ealg_get_byidx(unsigned int idx
);
1724 struct xfrm_algo_desc
*xfrm_aalg_get_byid(int alg_id
);
1725 struct xfrm_algo_desc
*xfrm_ealg_get_byid(int alg_id
);
1726 struct xfrm_algo_desc
*xfrm_calg_get_byid(int alg_id
);
1727 struct xfrm_algo_desc
*xfrm_aalg_get_byname(const char *name
, int probe
);
1728 struct xfrm_algo_desc
*xfrm_ealg_get_byname(const char *name
, int probe
);
1729 struct xfrm_algo_desc
*xfrm_calg_get_byname(const char *name
, int probe
);
1730 struct xfrm_algo_desc
*xfrm_aead_get_byname(const char *name
, int icv_len
,
1733 static inline bool xfrm6_addr_equal(const xfrm_address_t
*a
,
1734 const xfrm_address_t
*b
)
1736 return ipv6_addr_equal((const struct in6_addr
*)a
,
1737 (const struct in6_addr
*)b
);
1740 static inline bool xfrm_addr_equal(const xfrm_address_t
*a
,
1741 const xfrm_address_t
*b
,
1747 return ((__force u32
)a
->a4
^ (__force u32
)b
->a4
) == 0;
1749 return xfrm6_addr_equal(a
, b
);
1753 static inline int xfrm_policy_id2dir(u32 index
)
1759 static inline int xfrm_aevent_is_on(struct net
*net
)
1765 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1767 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_AEVENTS
);
1772 static inline int xfrm_acquire_is_on(struct net
*net
)
1778 nlsk
= rcu_dereference(net
->xfrm
.nlsk
);
1780 ret
= netlink_has_listeners(nlsk
, XFRMNLGRP_ACQUIRE
);
1787 static inline unsigned int aead_len(struct xfrm_algo_aead
*alg
)
1789 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1792 static inline unsigned int xfrm_alg_len(const struct xfrm_algo
*alg
)
1794 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1797 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth
*alg
)
1799 return sizeof(*alg
) + ((alg
->alg_key_len
+ 7) / 8);
1802 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn
*replay_esn
)
1804 return sizeof(*replay_esn
) + replay_esn
->bmp_len
* sizeof(__u32
);
1807 #ifdef CONFIG_XFRM_MIGRATE
1808 static inline int xfrm_replay_clone(struct xfrm_state
*x
,
1809 struct xfrm_state
*orig
)
1811 x
->replay_esn
= kzalloc(xfrm_replay_state_esn_len(orig
->replay_esn
),
1816 x
->replay_esn
->bmp_len
= orig
->replay_esn
->bmp_len
;
1817 x
->replay_esn
->replay_window
= orig
->replay_esn
->replay_window
;
1819 x
->preplay_esn
= kmemdup(x
->replay_esn
,
1820 xfrm_replay_state_esn_len(x
->replay_esn
),
1822 if (!x
->preplay_esn
) {
1823 kfree(x
->replay_esn
);
1830 static inline struct xfrm_algo_aead
*xfrm_algo_aead_clone(struct xfrm_algo_aead
*orig
)
1832 return kmemdup(orig
, aead_len(orig
), GFP_KERNEL
);
1836 static inline struct xfrm_algo
*xfrm_algo_clone(struct xfrm_algo
*orig
)
1838 return kmemdup(orig
, xfrm_alg_len(orig
), GFP_KERNEL
);
1841 static inline struct xfrm_algo_auth
*xfrm_algo_auth_clone(struct xfrm_algo_auth
*orig
)
1843 return kmemdup(orig
, xfrm_alg_auth_len(orig
), GFP_KERNEL
);
1846 static inline void xfrm_states_put(struct xfrm_state
**states
, int n
)
1849 for (i
= 0; i
< n
; i
++)
1850 xfrm_state_put(*(states
+ i
));
1853 static inline void xfrm_states_delete(struct xfrm_state
**states
, int n
)
1856 for (i
= 0; i
< n
; i
++)
1857 xfrm_state_delete(*(states
+ i
));
1862 static inline struct xfrm_state
*xfrm_input_state(struct sk_buff
*skb
)
1864 return skb
->sp
->xvec
[skb
->sp
->len
- 1];
1866 static inline struct xfrm_offload
*xfrm_offload(struct sk_buff
*skb
)
1868 struct sec_path
*sp
= skb
->sp
;
1870 if (!sp
|| !sp
->olen
|| sp
->len
!= sp
->olen
)
1873 return &sp
->ovec
[sp
->olen
- 1];
1877 void __net_init
xfrm_dev_init(void);
1879 #ifdef CONFIG_XFRM_OFFLOAD
1880 int validate_xmit_xfrm(struct sk_buff
*skb
, netdev_features_t features
);
1881 int xfrm_dev_state_add(struct net
*net
, struct xfrm_state
*x
,
1882 struct xfrm_user_offload
*xuo
);
1883 bool xfrm_dev_offload_ok(struct sk_buff
*skb
, struct xfrm_state
*x
);
1885 static inline bool xfrm_dst_offload_ok(struct dst_entry
*dst
)
1887 struct xfrm_state
*x
= dst
->xfrm
;
1889 if (!x
|| !x
->type_offload
)
1892 if (x
->xso
.offload_handle
&& (x
->xso
.dev
== dst
->path
->dev
) &&
1899 static inline void xfrm_dev_state_delete(struct xfrm_state
*x
)
1901 struct xfrm_state_offload
*xso
= &x
->xso
;
1904 xso
->dev
->xfrmdev_ops
->xdo_dev_state_delete(x
);
1907 static inline void xfrm_dev_state_free(struct xfrm_state
*x
)
1909 struct xfrm_state_offload
*xso
= &x
->xso
;
1910 struct net_device
*dev
= xso
->dev
;
1912 if (dev
&& dev
->xfrmdev_ops
) {
1913 dev
->xfrmdev_ops
->xdo_dev_state_free(x
);
1919 static inline int validate_xmit_xfrm(struct sk_buff
*skb
, netdev_features_t features
)
1924 static inline int xfrm_dev_state_add(struct net
*net
, struct xfrm_state
*x
, struct xfrm_user_offload
*xuo
)
1929 static inline void xfrm_dev_state_delete(struct xfrm_state
*x
)
1933 static inline void xfrm_dev_state_free(struct xfrm_state
*x
)
1937 static inline bool xfrm_dev_offload_ok(struct sk_buff
*skb
, struct xfrm_state
*x
)
1942 static inline bool xfrm_dst_offload_ok(struct dst_entry
*dst
)
1948 static inline int xfrm_mark_get(struct nlattr
**attrs
, struct xfrm_mark
*m
)
1950 if (attrs
[XFRMA_MARK
])
1951 memcpy(m
, nla_data(attrs
[XFRMA_MARK
]), sizeof(struct xfrm_mark
));
1958 static inline int xfrm_mark_put(struct sk_buff
*skb
, const struct xfrm_mark
*m
)
1963 ret
= nla_put(skb
, XFRMA_MARK
, sizeof(struct xfrm_mark
), m
);
1967 static inline int xfrm_tunnel_check(struct sk_buff
*skb
, struct xfrm_state
*x
,
1968 unsigned int family
)
1970 bool tunnel
= false;
1974 if (XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip4
)
1978 if (XFRM_TUNNEL_SKB_CB(skb
)->tunnel
.ip6
)
1982 if (tunnel
&& !(x
->outer_mode
->flags
& XFRM_MODE_FLAG_TUNNEL
))
1987 #endif /* _NET_XFRM_H */