1
2#ifndef _NET_XFRM_H
3#define _NET_XFRM_H
4
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>
18
19#include <net/sock.h>
20#include <net/dst.h>
21#include <net/ip.h>
22#include <net/route.h>
23#include <net/ipv6.h>
24#include <net/ip6_fib.h>
25#include <net/flow.h>
26#include <net/gro_cells.h>
27
28#include <linux/interrupt.h>
29
30#ifdef CONFIG_XFRM_STATISTICS
31#include <net/snmp.h>
32#endif
33
34#define XFRM_PROTO_ESP 50
35#define XFRM_PROTO_AH 51
36#define XFRM_PROTO_COMP 108
37#define XFRM_PROTO_IPIP 4
38#define XFRM_PROTO_IPV6 41
39#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
40#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
41
42#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
43#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
44#define MODULE_ALIAS_XFRM_MODE(family, encap) \
45 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
46#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
47 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
48#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
49 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
50
51#ifdef CONFIG_XFRM_STATISTICS
52#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
53#else
54#define XFRM_INC_STATS(net, field) ((void)(net))
55#endif
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118
119struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
122 u8 dying;
123 u8 proto;
124 u32 seq;
125 struct xfrm_address_filter *filter;
126};
127
128struct xfrm_state_offload {
129 struct net_device *dev;
130 unsigned long offload_handle;
131 unsigned int num_exthdrs;
132 u8 flags;
133};
134
135struct xfrm_mode {
136 u8 encap;
137 u8 family;
138 u8 flags;
139};
140
141
142enum {
143 XFRM_MODE_FLAG_TUNNEL = 1,
144};
145
146
147struct xfrm_state {
148 possible_net_t xs_net;
149 union {
150 struct hlist_node gclist;
151 struct hlist_node bydst;
152 };
153 struct hlist_node bysrc;
154 struct hlist_node byspi;
155
156 refcount_t refcnt;
157 spinlock_t lock;
158
159 struct xfrm_id id;
160 struct xfrm_selector sel;
161 struct xfrm_mark mark;
162 u32 if_id;
163 u32 tfcpad;
164
165 u32 genid;
166
167
168 struct xfrm_state_walk km;
169
170
171 struct {
172 u32 reqid;
173 u8 mode;
174 u8 replay_window;
175 u8 aalgo, ealgo, calgo;
176 u8 flags;
177 u16 family;
178 xfrm_address_t saddr;
179 int header_len;
180 int trailer_len;
181 u32 extra_flags;
182 struct xfrm_mark smark;
183 } props;
184
185 struct xfrm_lifetime_cfg lft;
186
187
188 struct xfrm_algo_auth *aalg;
189 struct xfrm_algo *ealg;
190 struct xfrm_algo *calg;
191 struct xfrm_algo_aead *aead;
192 const char *geniv;
193
194
195 struct xfrm_encap_tmpl *encap;
196
197
198 xfrm_address_t *coaddr;
199
200
201 struct xfrm_state *tunnel;
202
203
204 atomic_t tunnel_users;
205
206
207 struct xfrm_replay_state replay;
208 struct xfrm_replay_state_esn *replay_esn;
209
210
211 struct xfrm_replay_state preplay;
212 struct xfrm_replay_state_esn *preplay_esn;
213
214
215 const struct xfrm_replay *repl;
216
217
218
219
220 u32 xflags;
221
222
223 u32 replay_maxage;
224 u32 replay_maxdiff;
225
226
227 struct timer_list rtimer;
228
229
230 struct xfrm_stats stats;
231
232 struct xfrm_lifetime_cur curlft;
233 struct hrtimer mtimer;
234
235 struct xfrm_state_offload xso;
236
237
238 long saved_tmo;
239
240
241 time64_t lastused;
242
243 struct page_frag xfrag;
244
245
246
247 const struct xfrm_type *type;
248 struct xfrm_mode inner_mode;
249 struct xfrm_mode inner_mode_iaf;
250 struct xfrm_mode outer_mode;
251
252 const struct xfrm_type_offload *type_offload;
253
254
255 struct xfrm_sec_ctx *security;
256
257
258
259 void *data;
260};
261
262static inline struct net *xs_net(struct xfrm_state *x)
263{
264 return read_pnet(&x->xs_net);
265}
266
267
268#define XFRM_TIME_DEFER 1
269#define XFRM_SOFT_EXPIRE 2
270
271enum {
272 XFRM_STATE_VOID,
273 XFRM_STATE_ACQ,
274 XFRM_STATE_VALID,
275 XFRM_STATE_ERROR,
276 XFRM_STATE_EXPIRED,
277 XFRM_STATE_DEAD
278};
279
280
281struct km_event {
282 union {
283 u32 hard;
284 u32 proto;
285 u32 byid;
286 u32 aevent;
287 u32 type;
288 } data;
289
290 u32 seq;
291 u32 portid;
292 u32 event;
293 struct net *net;
294};
295
296struct xfrm_replay {
297 void (*advance)(struct xfrm_state *x, __be32 net_seq);
298 int (*check)(struct xfrm_state *x,
299 struct sk_buff *skb,
300 __be32 net_seq);
301 int (*recheck)(struct xfrm_state *x,
302 struct sk_buff *skb,
303 __be32 net_seq);
304 void (*notify)(struct xfrm_state *x, int event);
305 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
306};
307
308struct xfrm_if_cb {
309 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
310 unsigned short family);
311};
312
313void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
314void xfrm_if_unregister_cb(void);
315
316struct net_device;
317struct xfrm_type;
318struct xfrm_dst;
319struct xfrm_policy_afinfo {
320 struct dst_ops *dst_ops;
321 struct dst_entry *(*dst_lookup)(struct net *net,
322 int tos, int oif,
323 const xfrm_address_t *saddr,
324 const xfrm_address_t *daddr,
325 u32 mark);
326 int (*get_saddr)(struct net *net, int oif,
327 xfrm_address_t *saddr,
328 xfrm_address_t *daddr,
329 u32 mark);
330 int (*fill_dst)(struct xfrm_dst *xdst,
331 struct net_device *dev,
332 const struct flowi *fl);
333 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
334};
335
336int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
337void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
338void km_policy_notify(struct xfrm_policy *xp, int dir,
339 const struct km_event *c);
340void km_state_notify(struct xfrm_state *x, const struct km_event *c);
341
342struct xfrm_tmpl;
343int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
344 struct xfrm_policy *pol);
345void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
346int __xfrm_state_delete(struct xfrm_state *x);
347
348struct xfrm_state_afinfo {
349 unsigned int family;
350 unsigned int proto;
351 __be16 eth_proto;
352 struct module *owner;
353 const struct xfrm_type *type_map[IPPROTO_MAX];
354 const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX];
355
356 int (*init_flags)(struct xfrm_state *x);
357 void (*init_tempsel)(struct xfrm_selector *sel,
358 const struct flowi *fl);
359 void (*init_temprop)(struct xfrm_state *x,
360 const struct xfrm_tmpl *tmpl,
361 const xfrm_address_t *daddr,
362 const xfrm_address_t *saddr);
363 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
364 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
365 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
366 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
367 int (*extract_input)(struct xfrm_state *x,
368 struct sk_buff *skb);
369 int (*extract_output)(struct xfrm_state *x,
370 struct sk_buff *skb);
371 int (*transport_finish)(struct sk_buff *skb,
372 int async);
373 void (*local_error)(struct sk_buff *skb, u32 mtu);
374};
375
376int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
377int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
378struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
379struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
380
381struct xfrm_input_afinfo {
382 unsigned int family;
383 int (*callback)(struct sk_buff *skb, u8 protocol,
384 int err);
385};
386
387int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
388int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
389
390void xfrm_flush_gc(void);
391void xfrm_state_delete_tunnel(struct xfrm_state *x);
392
393struct xfrm_type {
394 char *description;
395 struct module *owner;
396 u8 proto;
397 u8 flags;
398#define XFRM_TYPE_NON_FRAGMENT 1
399#define XFRM_TYPE_REPLAY_PROT 2
400#define XFRM_TYPE_LOCAL_COADDR 4
401#define XFRM_TYPE_REMOTE_COADDR 8
402
403 int (*init_state)(struct xfrm_state *x);
404 void (*destructor)(struct xfrm_state *);
405 int (*input)(struct xfrm_state *, struct sk_buff *skb);
406 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
407 int (*reject)(struct xfrm_state *, struct sk_buff *,
408 const struct flowi *);
409 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
410
411 u32 (*get_mtu)(struct xfrm_state *, int size);
412};
413
414int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
415int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
416
417struct xfrm_type_offload {
418 char *description;
419 struct module *owner;
420 u8 proto;
421 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
422 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
423 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
424};
425
426int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
427int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
428
429static inline int xfrm_af2proto(unsigned int family)
430{
431 switch(family) {
432 case AF_INET:
433 return IPPROTO_IPIP;
434 case AF_INET6:
435 return IPPROTO_IPV6;
436 default:
437 return 0;
438 }
439}
440
441static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
442{
443 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
444 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
445 return &x->inner_mode;
446 else
447 return &x->inner_mode_iaf;
448}
449
450struct xfrm_tmpl {
451
452
453
454
455
456
457 struct xfrm_id id;
458
459
460 xfrm_address_t saddr;
461
462 unsigned short encap_family;
463
464 u32 reqid;
465
466
467 u8 mode;
468
469
470 u8 share;
471
472
473 u8 optional;
474
475
476 u8 allalgs;
477
478
479 u32 aalgos;
480 u32 ealgos;
481 u32 calgos;
482};
483
484#define XFRM_MAX_DEPTH 6
485#define XFRM_MAX_OFFLOAD_DEPTH 1
486
487struct xfrm_policy_walk_entry {
488 struct list_head all;
489 u8 dead;
490};
491
492struct xfrm_policy_walk {
493 struct xfrm_policy_walk_entry walk;
494 u8 type;
495 u32 seq;
496};
497
498struct xfrm_policy_queue {
499 struct sk_buff_head hold_queue;
500 struct timer_list hold_timer;
501 unsigned long timeout;
502};
503
504struct xfrm_policy {
505 possible_net_t xp_net;
506 struct hlist_node bydst;
507 struct hlist_node byidx;
508
509
510 rwlock_t lock;
511 refcount_t refcnt;
512 u32 pos;
513 struct timer_list timer;
514
515 atomic_t genid;
516 u32 priority;
517 u32 index;
518 u32 if_id;
519 struct xfrm_mark mark;
520 struct xfrm_selector selector;
521 struct xfrm_lifetime_cfg lft;
522 struct xfrm_lifetime_cur curlft;
523 struct xfrm_policy_walk_entry walk;
524 struct xfrm_policy_queue polq;
525 bool bydst_reinsert;
526 u8 type;
527 u8 action;
528 u8 flags;
529 u8 xfrm_nr;
530 u16 family;
531 struct xfrm_sec_ctx *security;
532 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
533 struct hlist_node bydst_inexact_list;
534 struct rcu_head rcu;
535};
536
537static inline struct net *xp_net(const struct xfrm_policy *xp)
538{
539 return read_pnet(&xp->xp_net);
540}
541
542struct xfrm_kmaddress {
543 xfrm_address_t local;
544 xfrm_address_t remote;
545 u32 reserved;
546 u16 family;
547};
548
549struct xfrm_migrate {
550 xfrm_address_t old_daddr;
551 xfrm_address_t old_saddr;
552 xfrm_address_t new_daddr;
553 xfrm_address_t new_saddr;
554 u8 proto;
555 u8 mode;
556 u16 reserved;
557 u32 reqid;
558 u16 old_family;
559 u16 new_family;
560};
561
562#define XFRM_KM_TIMEOUT 30
563
564#define XFRM_REPLAY_UPDATE XFRM_AE_CR
565#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
566
567
568#define XFRM_AE_ETIME 10
569
570#define XFRM_AE_ETH_M 10
571
572#define XFRM_AE_SEQT_SIZE 2
573
574struct xfrm_mgr {
575 struct list_head list;
576 int (*notify)(struct xfrm_state *x, const struct km_event *c);
577 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
578 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
579 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
580 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
581 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
582 int (*migrate)(const struct xfrm_selector *sel,
583 u8 dir, u8 type,
584 const struct xfrm_migrate *m,
585 int num_bundles,
586 const struct xfrm_kmaddress *k,
587 const struct xfrm_encap_tmpl *encap);
588 bool (*is_alive)(const struct km_event *c);
589};
590
591int xfrm_register_km(struct xfrm_mgr *km);
592int xfrm_unregister_km(struct xfrm_mgr *km);
593
594struct xfrm_tunnel_skb_cb {
595 union {
596 struct inet_skb_parm h4;
597 struct inet6_skb_parm h6;
598 } header;
599
600 union {
601 struct ip_tunnel *ip4;
602 struct ip6_tnl *ip6;
603 } tunnel;
604};
605
606#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
607
608
609
610
611
612
613struct xfrm_skb_cb {
614 struct xfrm_tunnel_skb_cb header;
615
616
617 union {
618 struct {
619 __u32 low;
620 __u32 hi;
621 } output;
622 struct {
623 __be32 low;
624 __be32 hi;
625 } input;
626 } seq;
627};
628
629#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
630
631
632
633
634
635struct xfrm_mode_skb_cb {
636 struct xfrm_tunnel_skb_cb header;
637
638
639 __be16 id;
640 __be16 frag_off;
641
642
643 u8 ihl;
644
645
646 u8 tos;
647
648
649 u8 ttl;
650
651
652 u8 protocol;
653
654
655 u8 optlen;
656
657
658 u8 flow_lbl[3];
659};
660
661#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
662
663
664
665
666
667struct xfrm_spi_skb_cb {
668 struct xfrm_tunnel_skb_cb header;
669
670 unsigned int daddroff;
671 unsigned int family;
672 __be32 seq;
673};
674
675#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
676
677#ifdef CONFIG_AUDITSYSCALL
678static inline struct audit_buffer *xfrm_audit_start(const char *op)
679{
680 struct audit_buffer *audit_buf = NULL;
681
682 if (audit_enabled == AUDIT_OFF)
683 return NULL;
684 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
685 AUDIT_MAC_IPSEC_EVENT);
686 if (audit_buf == NULL)
687 return NULL;
688 audit_log_format(audit_buf, "op=%s", op);
689 return audit_buf;
690}
691
692static inline void xfrm_audit_helper_usrinfo(bool task_valid,
693 struct audit_buffer *audit_buf)
694{
695 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
696 audit_get_loginuid(current) :
697 INVALID_UID);
698 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
699 AUDIT_SID_UNSET;
700
701 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
702 audit_log_task_context(audit_buf);
703}
704
705void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
706void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
707 bool task_valid);
708void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
709void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
710void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
711 struct sk_buff *skb);
712void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
713 __be32 net_seq);
714void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
715void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
716 __be32 net_seq);
717void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
718 u8 proto);
719#else
720
721static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
722 bool task_valid)
723{
724}
725
726static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
727 bool task_valid)
728{
729}
730
731static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
732 bool task_valid)
733{
734}
735
736static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
737 bool task_valid)
738{
739}
740
741static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
742 struct sk_buff *skb)
743{
744}
745
746static inline void xfrm_audit_state_replay(struct xfrm_state *x,
747 struct sk_buff *skb, __be32 net_seq)
748{
749}
750
751static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
752 u16 family)
753{
754}
755
756static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
757 __be32 net_spi, __be32 net_seq)
758{
759}
760
761static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
762 struct sk_buff *skb, u8 proto)
763{
764}
765#endif
766
767static inline void xfrm_pol_hold(struct xfrm_policy *policy)
768{
769 if (likely(policy != NULL))
770 refcount_inc(&policy->refcnt);
771}
772
773void xfrm_policy_destroy(struct xfrm_policy *policy);
774
775static inline void xfrm_pol_put(struct xfrm_policy *policy)
776{
777 if (refcount_dec_and_test(&policy->refcnt))
778 xfrm_policy_destroy(policy);
779}
780
781static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
782{
783 int i;
784 for (i = npols - 1; i >= 0; --i)
785 xfrm_pol_put(pols[i]);
786}
787
788void __xfrm_state_destroy(struct xfrm_state *, bool);
789
790static inline void __xfrm_state_put(struct xfrm_state *x)
791{
792 refcount_dec(&x->refcnt);
793}
794
795static inline void xfrm_state_put(struct xfrm_state *x)
796{
797 if (refcount_dec_and_test(&x->refcnt))
798 __xfrm_state_destroy(x, false);
799}
800
801static inline void xfrm_state_put_sync(struct xfrm_state *x)
802{
803 if (refcount_dec_and_test(&x->refcnt))
804 __xfrm_state_destroy(x, true);
805}
806
807static inline void xfrm_state_hold(struct xfrm_state *x)
808{
809 refcount_inc(&x->refcnt);
810}
811
812static inline bool addr_match(const void *token1, const void *token2,
813 unsigned int prefixlen)
814{
815 const __be32 *a1 = token1;
816 const __be32 *a2 = token2;
817 unsigned int pdw;
818 unsigned int pbi;
819
820 pdw = prefixlen >> 5;
821 pbi = prefixlen & 0x1f;
822
823 if (pdw)
824 if (memcmp(a1, a2, pdw << 2))
825 return false;
826
827 if (pbi) {
828 __be32 mask;
829
830 mask = htonl((0xffffffff) << (32 - pbi));
831
832 if ((a1[pdw] ^ a2[pdw]) & mask)
833 return false;
834 }
835
836 return true;
837}
838
839static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
840{
841
842 if (sizeof(long) == 4 && prefixlen == 0)
843 return true;
844 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
845}
846
847static __inline__
848__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
849{
850 __be16 port;
851 switch(fl->flowi_proto) {
852 case IPPROTO_TCP:
853 case IPPROTO_UDP:
854 case IPPROTO_UDPLITE:
855 case IPPROTO_SCTP:
856 port = uli->ports.sport;
857 break;
858 case IPPROTO_ICMP:
859 case IPPROTO_ICMPV6:
860 port = htons(uli->icmpt.type);
861 break;
862 case IPPROTO_MH:
863 port = htons(uli->mht.type);
864 break;
865 case IPPROTO_GRE:
866 port = htons(ntohl(uli->gre_key) >> 16);
867 break;
868 default:
869 port = 0;
870 }
871 return port;
872}
873
874static __inline__
875__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
876{
877 __be16 port;
878 switch(fl->flowi_proto) {
879 case IPPROTO_TCP:
880 case IPPROTO_UDP:
881 case IPPROTO_UDPLITE:
882 case IPPROTO_SCTP:
883 port = uli->ports.dport;
884 break;
885 case IPPROTO_ICMP:
886 case IPPROTO_ICMPV6:
887 port = htons(uli->icmpt.code);
888 break;
889 case IPPROTO_GRE:
890 port = htons(ntohl(uli->gre_key) & 0xffff);
891 break;
892 default:
893 port = 0;
894 }
895 return port;
896}
897
898bool xfrm_selector_match(const struct xfrm_selector *sel,
899 const struct flowi *fl, unsigned short family);
900
901#ifdef CONFIG_SECURITY_NETWORK_XFRM
902
903
904
905static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
906{
907 return ((!s1 && !s2) ||
908 (s1 && s2 &&
909 (s1->ctx_sid == s2->ctx_sid) &&
910 (s1->ctx_doi == s2->ctx_doi) &&
911 (s1->ctx_alg == s2->ctx_alg)));
912}
913#else
914static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
915{
916 return true;
917}
918#endif
919
920
921
922
923
924
925
926
927
928
929
930
931struct xfrm_dst {
932 union {
933 struct dst_entry dst;
934 struct rtable rt;
935 struct rt6_info rt6;
936 } u;
937 struct dst_entry *route;
938 struct dst_entry *child;
939 struct dst_entry *path;
940 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
941 int num_pols, num_xfrms;
942 u32 xfrm_genid;
943 u32 policy_genid;
944 u32 route_mtu_cached;
945 u32 child_mtu_cached;
946 u32 route_cookie;
947 u32 path_cookie;
948};
949
950static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
951{
952#ifdef CONFIG_XFRM
953 if (dst->xfrm) {
954 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
955
956 return xdst->path;
957 }
958#endif
959 return (struct dst_entry *) dst;
960}
961
962static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
963{
964#ifdef CONFIG_XFRM
965 if (dst->xfrm) {
966 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
967 return xdst->child;
968 }
969#endif
970 return NULL;
971}
972
973#ifdef CONFIG_XFRM
974static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
975{
976 xdst->child = child;
977}
978
979static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
980{
981 xfrm_pols_put(xdst->pols, xdst->num_pols);
982 dst_release(xdst->route);
983 if (likely(xdst->u.dst.xfrm))
984 xfrm_state_put(xdst->u.dst.xfrm);
985}
986#endif
987
988void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
989
990struct xfrm_if_parms {
991 char name[IFNAMSIZ];
992 int link;
993 u32 if_id;
994};
995
996struct xfrm_if {
997 struct xfrm_if __rcu *next;
998 struct net_device *dev;
999 struct net_device *phydev;
1000 struct net *net;
1001 struct xfrm_if_parms p;
1002
1003 struct gro_cells gro_cells;
1004};
1005
1006struct xfrm_offload {
1007
1008 struct {
1009 __u32 low;
1010 __u32 hi;
1011 } seq;
1012
1013 __u32 flags;
1014#define SA_DELETE_REQ 1
1015#define CRYPTO_DONE 2
1016#define CRYPTO_NEXT_DONE 4
1017#define CRYPTO_FALLBACK 8
1018#define XFRM_GSO_SEGMENT 16
1019#define XFRM_GRO 32
1020#define XFRM_ESP_NO_TRAILER 64
1021#define XFRM_DEV_RESUME 128
1022
1023 __u32 status;
1024#define CRYPTO_SUCCESS 1
1025#define CRYPTO_GENERIC_ERROR 2
1026#define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1027#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1028#define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1029#define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1030#define CRYPTO_INVALID_PACKET_SYNTAX 64
1031#define CRYPTO_INVALID_PROTOCOL 128
1032
1033 __u8 proto;
1034};
1035
1036struct sec_path {
1037 int len;
1038 int olen;
1039
1040 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1041 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1042};
1043
1044struct sec_path *secpath_set(struct sk_buff *skb);
1045
1046static inline void
1047secpath_reset(struct sk_buff *skb)
1048{
1049#ifdef CONFIG_XFRM
1050 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1051#endif
1052}
1053
1054static inline int
1055xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1056{
1057 switch (family) {
1058 case AF_INET:
1059 return addr->a4 == 0;
1060 case AF_INET6:
1061 return ipv6_addr_any(&addr->in6);
1062 }
1063 return 0;
1064}
1065
1066static inline int
1067__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1068{
1069 return (tmpl->saddr.a4 &&
1070 tmpl->saddr.a4 != x->props.saddr.a4);
1071}
1072
1073static inline int
1074__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1075{
1076 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1077 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1078}
1079
1080static inline int
1081xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1082{
1083 switch (family) {
1084 case AF_INET:
1085 return __xfrm4_state_addr_cmp(tmpl, x);
1086 case AF_INET6:
1087 return __xfrm6_state_addr_cmp(tmpl, x);
1088 }
1089 return !0;
1090}
1091
1092#ifdef CONFIG_XFRM
1093int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1094 unsigned short family);
1095
1096static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1097 struct sk_buff *skb,
1098 unsigned int family, int reverse)
1099{
1100 struct net *net = dev_net(skb->dev);
1101 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1102
1103 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1104 return __xfrm_policy_check(sk, ndir, skb, family);
1105
1106 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1107 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1108 __xfrm_policy_check(sk, ndir, skb, family);
1109}
1110
1111static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1112{
1113 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1114}
1115
1116static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1117{
1118 return xfrm_policy_check(sk, dir, skb, AF_INET);
1119}
1120
1121static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1122{
1123 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1124}
1125
1126static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1127 struct sk_buff *skb)
1128{
1129 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1130}
1131
1132static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1133 struct sk_buff *skb)
1134{
1135 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1136}
1137
1138int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1139 unsigned int family, int reverse);
1140
1141static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1142 unsigned int family)
1143{
1144 return __xfrm_decode_session(skb, fl, family, 0);
1145}
1146
1147static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1148 struct flowi *fl,
1149 unsigned int family)
1150{
1151 return __xfrm_decode_session(skb, fl, family, 1);
1152}
1153
1154int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1155
1156static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1157{
1158 struct net *net = dev_net(skb->dev);
1159
1160 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1161 (skb_dst(skb)->flags & DST_NOXFRM) ||
1162 __xfrm_route_forward(skb, family);
1163}
1164
1165static inline int xfrm4_route_forward(struct sk_buff *skb)
1166{
1167 return xfrm_route_forward(skb, AF_INET);
1168}
1169
1170static inline int xfrm6_route_forward(struct sk_buff *skb)
1171{
1172 return xfrm_route_forward(skb, AF_INET6);
1173}
1174
1175int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1176
1177static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1178{
1179 sk->sk_policy[0] = NULL;
1180 sk->sk_policy[1] = NULL;
1181 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1182 return __xfrm_sk_clone_policy(sk, osk);
1183 return 0;
1184}
1185
1186int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1187
1188static inline void xfrm_sk_free_policy(struct sock *sk)
1189{
1190 struct xfrm_policy *pol;
1191
1192 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1193 if (unlikely(pol != NULL)) {
1194 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1195 sk->sk_policy[0] = NULL;
1196 }
1197 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1198 if (unlikely(pol != NULL)) {
1199 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1200 sk->sk_policy[1] = NULL;
1201 }
1202}
1203
1204#else
1205
1206static inline void xfrm_sk_free_policy(struct sock *sk) {}
1207static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1208static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1209static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1210static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1211{
1212 return 1;
1213}
1214static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1215{
1216 return 1;
1217}
1218static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1219{
1220 return 1;
1221}
1222static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1223 struct flowi *fl,
1224 unsigned int family)
1225{
1226 return -ENOSYS;
1227}
1228static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1229 struct sk_buff *skb)
1230{
1231 return 1;
1232}
1233static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1234 struct sk_buff *skb)
1235{
1236 return 1;
1237}
1238#endif
1239
1240static __inline__
1241xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1242{
1243 switch (family){
1244 case AF_INET:
1245 return (xfrm_address_t *)&fl->u.ip4.daddr;
1246 case AF_INET6:
1247 return (xfrm_address_t *)&fl->u.ip6.daddr;
1248 }
1249 return NULL;
1250}
1251
1252static __inline__
1253xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1254{
1255 switch (family){
1256 case AF_INET:
1257 return (xfrm_address_t *)&fl->u.ip4.saddr;
1258 case AF_INET6:
1259 return (xfrm_address_t *)&fl->u.ip6.saddr;
1260 }
1261 return NULL;
1262}
1263
1264static __inline__
1265void xfrm_flowi_addr_get(const struct flowi *fl,
1266 xfrm_address_t *saddr, xfrm_address_t *daddr,
1267 unsigned short family)
1268{
1269 switch(family) {
1270 case AF_INET:
1271 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1272 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1273 break;
1274 case AF_INET6:
1275 saddr->in6 = fl->u.ip6.saddr;
1276 daddr->in6 = fl->u.ip6.daddr;
1277 break;
1278 }
1279}
1280
1281static __inline__ int
1282__xfrm4_state_addr_check(const struct xfrm_state *x,
1283 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1284{
1285 if (daddr->a4 == x->id.daddr.a4 &&
1286 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1287 return 1;
1288 return 0;
1289}
1290
1291static __inline__ int
1292__xfrm6_state_addr_check(const struct xfrm_state *x,
1293 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1294{
1295 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1296 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1297 ipv6_addr_any((struct in6_addr *)saddr) ||
1298 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1299 return 1;
1300 return 0;
1301}
1302
1303static __inline__ int
1304xfrm_state_addr_check(const struct xfrm_state *x,
1305 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1306 unsigned short family)
1307{
1308 switch (family) {
1309 case AF_INET:
1310 return __xfrm4_state_addr_check(x, daddr, saddr);
1311 case AF_INET6:
1312 return __xfrm6_state_addr_check(x, daddr, saddr);
1313 }
1314 return 0;
1315}
1316
1317static __inline__ int
1318xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1319 unsigned short family)
1320{
1321 switch (family) {
1322 case AF_INET:
1323 return __xfrm4_state_addr_check(x,
1324 (const xfrm_address_t *)&fl->u.ip4.daddr,
1325 (const xfrm_address_t *)&fl->u.ip4.saddr);
1326 case AF_INET6:
1327 return __xfrm6_state_addr_check(x,
1328 (const xfrm_address_t *)&fl->u.ip6.daddr,
1329 (const xfrm_address_t *)&fl->u.ip6.saddr);
1330 }
1331 return 0;
1332}
1333
1334static inline int xfrm_state_kern(const struct xfrm_state *x)
1335{
1336 return atomic_read(&x->tunnel_users);
1337}
1338
1339static inline bool xfrm_id_proto_valid(u8 proto)
1340{
1341 switch (proto) {
1342 case IPPROTO_AH:
1343 case IPPROTO_ESP:
1344 case IPPROTO_COMP:
1345#if IS_ENABLED(CONFIG_IPV6)
1346 case IPPROTO_ROUTING:
1347 case IPPROTO_DSTOPTS:
1348#endif
1349 return true;
1350 default:
1351 return false;
1352 }
1353}
1354
1355
1356static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1357{
1358 return (!userproto || proto == userproto ||
1359 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1360 proto == IPPROTO_ESP ||
1361 proto == IPPROTO_COMP)));
1362}
1363
1364
1365
1366
1367struct xfrm_algo_aead_info {
1368 char *geniv;
1369 u16 icv_truncbits;
1370};
1371
1372struct xfrm_algo_auth_info {
1373 u16 icv_truncbits;
1374 u16 icv_fullbits;
1375};
1376
1377struct xfrm_algo_encr_info {
1378 char *geniv;
1379 u16 blockbits;
1380 u16 defkeybits;
1381};
1382
1383struct xfrm_algo_comp_info {
1384 u16 threshold;
1385};
1386
1387struct xfrm_algo_desc {
1388 char *name;
1389 char *compat;
1390 u8 available:1;
1391 u8 pfkey_supported:1;
1392 union {
1393 struct xfrm_algo_aead_info aead;
1394 struct xfrm_algo_auth_info auth;
1395 struct xfrm_algo_encr_info encr;
1396 struct xfrm_algo_comp_info comp;
1397 } uinfo;
1398 struct sadb_alg desc;
1399};
1400
1401
1402struct xfrm4_protocol {
1403 int (*handler)(struct sk_buff *skb);
1404 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1405 int encap_type);
1406 int (*cb_handler)(struct sk_buff *skb, int err);
1407 int (*err_handler)(struct sk_buff *skb, u32 info);
1408
1409 struct xfrm4_protocol __rcu *next;
1410 int priority;
1411};
1412
1413struct xfrm6_protocol {
1414 int (*handler)(struct sk_buff *skb);
1415 int (*cb_handler)(struct sk_buff *skb, int err);
1416 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1417 u8 type, u8 code, int offset, __be32 info);
1418
1419 struct xfrm6_protocol __rcu *next;
1420 int priority;
1421};
1422
1423
1424struct xfrm_tunnel {
1425 int (*handler)(struct sk_buff *skb);
1426 int (*err_handler)(struct sk_buff *skb, u32 info);
1427
1428 struct xfrm_tunnel __rcu *next;
1429 int priority;
1430};
1431
1432struct xfrm6_tunnel {
1433 int (*handler)(struct sk_buff *skb);
1434 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1435 u8 type, u8 code, int offset, __be32 info);
1436 struct xfrm6_tunnel __rcu *next;
1437 int priority;
1438};
1439
1440void xfrm_init(void);
1441void xfrm4_init(void);
1442int xfrm_state_init(struct net *net);
1443void xfrm_state_fini(struct net *net);
1444void xfrm4_state_init(void);
1445void xfrm4_protocol_init(void);
1446#ifdef CONFIG_XFRM
1447int xfrm6_init(void);
1448void xfrm6_fini(void);
1449int xfrm6_state_init(void);
1450void xfrm6_state_fini(void);
1451int xfrm6_protocol_init(void);
1452void xfrm6_protocol_fini(void);
1453#else
1454static inline int xfrm6_init(void)
1455{
1456 return 0;
1457}
1458static inline void xfrm6_fini(void)
1459{
1460 ;
1461}
1462#endif
1463
1464#ifdef CONFIG_XFRM_STATISTICS
1465int xfrm_proc_init(struct net *net);
1466void xfrm_proc_fini(struct net *net);
1467#endif
1468
1469int xfrm_sysctl_init(struct net *net);
1470#ifdef CONFIG_SYSCTL
1471void xfrm_sysctl_fini(struct net *net);
1472#else
1473static inline void xfrm_sysctl_fini(struct net *net)
1474{
1475}
1476#endif
1477
1478void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1479 struct xfrm_address_filter *filter);
1480int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1481 int (*func)(struct xfrm_state *, int, void*), void *);
1482void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1483struct xfrm_state *xfrm_state_alloc(struct net *net);
1484void xfrm_state_free(struct xfrm_state *x);
1485struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1486 const xfrm_address_t *saddr,
1487 const struct flowi *fl,
1488 struct xfrm_tmpl *tmpl,
1489 struct xfrm_policy *pol, int *err,
1490 unsigned short family, u32 if_id);
1491struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1492 xfrm_address_t *daddr,
1493 xfrm_address_t *saddr,
1494 unsigned short family,
1495 u8 mode, u8 proto, u32 reqid);
1496struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1497 unsigned short family);
1498int xfrm_state_check_expire(struct xfrm_state *x);
1499void xfrm_state_insert(struct xfrm_state *x);
1500int xfrm_state_add(struct xfrm_state *x);
1501int xfrm_state_update(struct xfrm_state *x);
1502struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1503 const xfrm_address_t *daddr, __be32 spi,
1504 u8 proto, unsigned short family);
1505struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1506 const xfrm_address_t *daddr,
1507 const xfrm_address_t *saddr,
1508 u8 proto,
1509 unsigned short family);
1510#ifdef CONFIG_XFRM_SUB_POLICY
1511int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1512 unsigned short family, struct net *net);
1513int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1514 unsigned short family);
1515#else
1516static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
1517 int n, unsigned short family, struct net *net)
1518{
1519 return -ENOSYS;
1520}
1521
1522static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1523 int n, unsigned short family)
1524{
1525 return -ENOSYS;
1526}
1527#endif
1528
1529struct xfrmk_sadinfo {
1530 u32 sadhcnt;
1531 u32 sadhmcnt;
1532 u32 sadcnt;
1533};
1534
1535struct xfrmk_spdinfo {
1536 u32 incnt;
1537 u32 outcnt;
1538 u32 fwdcnt;
1539 u32 inscnt;
1540 u32 outscnt;
1541 u32 fwdscnt;
1542 u32 spdhcnt;
1543 u32 spdhmcnt;
1544};
1545
1546struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1547int xfrm_state_delete(struct xfrm_state *x);
1548int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1549int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1550void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1551void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1552u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1553int xfrm_init_replay(struct xfrm_state *x);
1554int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1555int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1556int xfrm_init_state(struct xfrm_state *x);
1557int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1558int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1559int xfrm_trans_queue(struct sk_buff *skb,
1560 int (*finish)(struct net *, struct sock *,
1561 struct sk_buff *));
1562int xfrm_output_resume(struct sk_buff *skb, int err);
1563int xfrm_output(struct sock *sk, struct sk_buff *skb);
1564
1565#if IS_ENABLED(CONFIG_NET_PKTGEN)
1566int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1567#endif
1568
1569void xfrm_local_error(struct sk_buff *skb, int mtu);
1570int xfrm4_extract_header(struct sk_buff *skb);
1571int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1572int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1573 int encap_type);
1574int xfrm4_transport_finish(struct sk_buff *skb, int async);
1575int xfrm4_rcv(struct sk_buff *skb);
1576int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1577
1578static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1579{
1580 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1581 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1582 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1583 return xfrm_input(skb, nexthdr, spi, 0);
1584}
1585
1586int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1587int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1588int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1589int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1590int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1591int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1592int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1593void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1594int xfrm6_extract_header(struct sk_buff *skb);
1595int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1596int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1597 struct ip6_tnl *t);
1598int xfrm6_transport_finish(struct sk_buff *skb, int async);
1599int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1600int xfrm6_rcv(struct sk_buff *skb);
1601int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1602 xfrm_address_t *saddr, u8 proto);
1603void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1604int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1605int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1606int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1607int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1608__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1609__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1610int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1611int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1612int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1613int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1614 u8 **prevhdr);
1615
1616#ifdef CONFIG_XFRM
1617int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1618int xfrm_user_policy(struct sock *sk, int optname,
1619 u8 __user *optval, int optlen);
1620#else
1621static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1622{
1623 return -ENOPROTOOPT;
1624}
1625
1626static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1627{
1628
1629 kfree_skb(skb);
1630 return 0;
1631}
1632#endif
1633
1634struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1635 const xfrm_address_t *saddr,
1636 const xfrm_address_t *daddr,
1637 int family, u32 mark);
1638
1639struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1640
1641void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1642int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1643 int (*func)(struct xfrm_policy *, int, int, void*),
1644 void *);
1645void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1646int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1647struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1648 u8 type, int dir,
1649 struct xfrm_selector *sel,
1650 struct xfrm_sec_ctx *ctx, int delete,
1651 int *err);
1652struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1653 int dir, u32 id, int delete, int *err);
1654int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1655void xfrm_policy_hash_rebuild(struct net *net);
1656u32 xfrm_get_acqseq(void);
1657int verify_spi_info(u8 proto, u32 min, u32 max);
1658int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1659struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1660 u8 mode, u32 reqid, u32 if_id, u8 proto,
1661 const xfrm_address_t *daddr,
1662 const xfrm_address_t *saddr, int create,
1663 unsigned short family);
1664int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1665
1666#ifdef CONFIG_XFRM_MIGRATE
1667int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1668 const struct xfrm_migrate *m, int num_bundles,
1669 const struct xfrm_kmaddress *k,
1670 const struct xfrm_encap_tmpl *encap);
1671struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1672struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1673 struct xfrm_migrate *m,
1674 struct xfrm_encap_tmpl *encap);
1675int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1676 struct xfrm_migrate *m, int num_bundles,
1677 struct xfrm_kmaddress *k, struct net *net,
1678 struct xfrm_encap_tmpl *encap);
1679#endif
1680
1681int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1682void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1683int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1684 xfrm_address_t *addr);
1685
1686void xfrm_input_init(void);
1687int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1688
1689void xfrm_probe_algs(void);
1690int xfrm_count_pfkey_auth_supported(void);
1691int xfrm_count_pfkey_enc_supported(void);
1692struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1693struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1694struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1695struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1696struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1697struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1698struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1699struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1700struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1701 int probe);
1702
1703static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1704 const xfrm_address_t *b)
1705{
1706 return ipv6_addr_equal((const struct in6_addr *)a,
1707 (const struct in6_addr *)b);
1708}
1709
1710static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1711 const xfrm_address_t *b,
1712 sa_family_t family)
1713{
1714 switch (family) {
1715 default:
1716 case AF_INET:
1717 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1718 case AF_INET6:
1719 return xfrm6_addr_equal(a, b);
1720 }
1721}
1722
1723static inline int xfrm_policy_id2dir(u32 index)
1724{
1725 return index & 7;
1726}
1727
1728#ifdef CONFIG_XFRM
1729static inline int xfrm_aevent_is_on(struct net *net)
1730{
1731 struct sock *nlsk;
1732 int ret = 0;
1733
1734 rcu_read_lock();
1735 nlsk = rcu_dereference(net->xfrm.nlsk);
1736 if (nlsk)
1737 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1738 rcu_read_unlock();
1739 return ret;
1740}
1741
1742static inline int xfrm_acquire_is_on(struct net *net)
1743{
1744 struct sock *nlsk;
1745 int ret = 0;
1746
1747 rcu_read_lock();
1748 nlsk = rcu_dereference(net->xfrm.nlsk);
1749 if (nlsk)
1750 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1751 rcu_read_unlock();
1752
1753 return ret;
1754}
1755#endif
1756
1757static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1758{
1759 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1760}
1761
1762static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1763{
1764 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1765}
1766
1767static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1768{
1769 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1770}
1771
1772static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1773{
1774 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1775}
1776
1777#ifdef CONFIG_XFRM_MIGRATE
1778static inline int xfrm_replay_clone(struct xfrm_state *x,
1779 struct xfrm_state *orig)
1780{
1781 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1782 GFP_KERNEL);
1783 if (!x->replay_esn)
1784 return -ENOMEM;
1785
1786 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1787 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1788
1789 x->preplay_esn = kmemdup(x->replay_esn,
1790 xfrm_replay_state_esn_len(x->replay_esn),
1791 GFP_KERNEL);
1792 if (!x->preplay_esn) {
1793 kfree(x->replay_esn);
1794 return -ENOMEM;
1795 }
1796
1797 return 0;
1798}
1799
1800static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1801{
1802 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1803}
1804
1805
1806static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1807{
1808 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1809}
1810
1811static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1812{
1813 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1814}
1815
1816static inline void xfrm_states_put(struct xfrm_state **states, int n)
1817{
1818 int i;
1819 for (i = 0; i < n; i++)
1820 xfrm_state_put(*(states + i));
1821}
1822
1823static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1824{
1825 int i;
1826 for (i = 0; i < n; i++)
1827 xfrm_state_delete(*(states + i));
1828}
1829#endif
1830
1831#ifdef CONFIG_XFRM
1832static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1833{
1834 struct sec_path *sp = skb_sec_path(skb);
1835
1836 return sp->xvec[sp->len - 1];
1837}
1838#endif
1839
1840static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1841{
1842#ifdef CONFIG_XFRM
1843 struct sec_path *sp = skb_sec_path(skb);
1844
1845 if (!sp || !sp->olen || sp->len != sp->olen)
1846 return NULL;
1847
1848 return &sp->ovec[sp->olen - 1];
1849#else
1850 return NULL;
1851#endif
1852}
1853
1854void __init xfrm_dev_init(void);
1855
1856#ifdef CONFIG_XFRM_OFFLOAD
1857void xfrm_dev_resume(struct sk_buff *skb);
1858void xfrm_dev_backlog(struct softnet_data *sd);
1859struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1860int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1861 struct xfrm_user_offload *xuo);
1862bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1863
1864static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1865{
1866 struct xfrm_state_offload *xso = &x->xso;
1867
1868 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1869 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1870}
1871
1872static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1873{
1874 struct xfrm_state *x = dst->xfrm;
1875 struct xfrm_dst *xdst;
1876
1877 if (!x || !x->type_offload)
1878 return false;
1879
1880 xdst = (struct xfrm_dst *) dst;
1881 if (!x->xso.offload_handle && !xdst->child->xfrm)
1882 return true;
1883 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1884 !xdst->child->xfrm)
1885 return true;
1886
1887 return false;
1888}
1889
1890static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1891{
1892 struct xfrm_state_offload *xso = &x->xso;
1893
1894 if (xso->dev)
1895 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1896}
1897
1898static inline void xfrm_dev_state_free(struct xfrm_state *x)
1899{
1900 struct xfrm_state_offload *xso = &x->xso;
1901 struct net_device *dev = xso->dev;
1902
1903 if (dev && dev->xfrmdev_ops) {
1904 if (dev->xfrmdev_ops->xdo_dev_state_free)
1905 dev->xfrmdev_ops->xdo_dev_state_free(x);
1906 xso->dev = NULL;
1907 dev_put(dev);
1908 }
1909}
1910#else
1911static inline void xfrm_dev_resume(struct sk_buff *skb)
1912{
1913}
1914
1915static inline void xfrm_dev_backlog(struct softnet_data *sd)
1916{
1917}
1918
1919static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1920{
1921 return skb;
1922}
1923
1924static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1925{
1926 return 0;
1927}
1928
1929static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1930{
1931}
1932
1933static inline void xfrm_dev_state_free(struct xfrm_state *x)
1934{
1935}
1936
1937static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1938{
1939 return false;
1940}
1941
1942static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1943{
1944}
1945
1946static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1947{
1948 return false;
1949}
1950#endif
1951
1952static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1953{
1954 if (attrs[XFRMA_MARK])
1955 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1956 else
1957 m->v = m->m = 0;
1958
1959 return m->v & m->m;
1960}
1961
1962static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1963{
1964 int ret = 0;
1965
1966 if (m->m | m->v)
1967 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1968 return ret;
1969}
1970
1971static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1972{
1973 struct xfrm_mark *m = &x->props.smark;
1974
1975 return (m->v & m->m) | (mark & ~m->m);
1976}
1977
1978static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1979{
1980 int ret = 0;
1981
1982 if (if_id)
1983 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1984 return ret;
1985}
1986
1987static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1988 unsigned int family)
1989{
1990 bool tunnel = false;
1991
1992 switch(family) {
1993 case AF_INET:
1994 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1995 tunnel = true;
1996 break;
1997 case AF_INET6:
1998 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1999 tunnel = true;
2000 break;
2001 }
2002 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
2003 return -EINVAL;
2004
2005 return 0;
2006}
2007#endif
2008