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#include <linux/sockptr.h>
19
20#include <net/sock.h>
21#include <net/dst.h>
22#include <net/ip.h>
23#include <net/route.h>
24#include <net/ipv6.h>
25#include <net/ip6_fib.h>
26#include <net/flow.h>
27#include <net/gro_cells.h>
28
29#include <linux/interrupt.h>
30
31#ifdef CONFIG_XFRM_STATISTICS
32#include <net/snmp.h>
33#endif
34
35#define XFRM_PROTO_ESP 50
36#define XFRM_PROTO_AH 51
37#define XFRM_PROTO_COMP 108
38#define XFRM_PROTO_IPIP 4
39#define XFRM_PROTO_IPV6 41
40#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
41#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
42
43#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
44#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
45#define MODULE_ALIAS_XFRM_MODE(family, encap) \
46 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
47#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
48 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
49#define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
50 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
51
52#ifdef CONFIG_XFRM_STATISTICS
53#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
54#else
55#define XFRM_INC_STATS(net, field) ((void)(net))
56#endif
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119
120struct xfrm_state_walk {
121 struct list_head all;
122 u8 state;
123 u8 dying;
124 u8 proto;
125 u32 seq;
126 struct xfrm_address_filter *filter;
127};
128
129struct xfrm_state_offload {
130 struct net_device *dev;
131 struct net_device *real_dev;
132 unsigned long offload_handle;
133 unsigned int num_exthdrs;
134 u8 flags;
135};
136
137struct xfrm_mode {
138 u8 encap;
139 u8 family;
140 u8 flags;
141};
142
143
144enum {
145 XFRM_MODE_FLAG_TUNNEL = 1,
146};
147
148
149struct xfrm_state {
150 possible_net_t xs_net;
151 union {
152 struct hlist_node gclist;
153 struct hlist_node bydst;
154 };
155 struct hlist_node bysrc;
156 struct hlist_node byspi;
157
158 refcount_t refcnt;
159 spinlock_t lock;
160
161 struct xfrm_id id;
162 struct xfrm_selector sel;
163 struct xfrm_mark mark;
164 u32 if_id;
165 u32 tfcpad;
166
167 u32 genid;
168
169
170 struct xfrm_state_walk km;
171
172
173 struct {
174 u32 reqid;
175 u8 mode;
176 u8 replay_window;
177 u8 aalgo, ealgo, calgo;
178 u8 flags;
179 u16 family;
180 xfrm_address_t saddr;
181 int header_len;
182 int trailer_len;
183 u32 extra_flags;
184 struct xfrm_mark smark;
185 } props;
186
187 struct xfrm_lifetime_cfg lft;
188
189
190 struct xfrm_algo_auth *aalg;
191 struct xfrm_algo *ealg;
192 struct xfrm_algo *calg;
193 struct xfrm_algo_aead *aead;
194 const char *geniv;
195
196
197 struct xfrm_encap_tmpl *encap;
198 struct sock __rcu *encap_sk;
199
200
201 xfrm_address_t *coaddr;
202
203
204 struct xfrm_state *tunnel;
205
206
207 atomic_t tunnel_users;
208
209
210 struct xfrm_replay_state replay;
211 struct xfrm_replay_state_esn *replay_esn;
212
213
214 struct xfrm_replay_state preplay;
215 struct xfrm_replay_state_esn *preplay_esn;
216
217
218 const struct xfrm_replay *repl;
219
220
221
222
223 u32 xflags;
224
225
226 u32 replay_maxage;
227 u32 replay_maxdiff;
228
229
230 struct timer_list rtimer;
231
232
233 struct xfrm_stats stats;
234
235 struct xfrm_lifetime_cur curlft;
236 struct hrtimer mtimer;
237
238 struct xfrm_state_offload xso;
239
240
241 long saved_tmo;
242
243
244 time64_t lastused;
245
246 struct page_frag xfrag;
247
248
249
250 const struct xfrm_type *type;
251 struct xfrm_mode inner_mode;
252 struct xfrm_mode inner_mode_iaf;
253 struct xfrm_mode outer_mode;
254
255 const struct xfrm_type_offload *type_offload;
256
257
258 struct xfrm_sec_ctx *security;
259
260
261
262 void *data;
263};
264
265static inline struct net *xs_net(struct xfrm_state *x)
266{
267 return read_pnet(&x->xs_net);
268}
269
270
271#define XFRM_TIME_DEFER 1
272#define XFRM_SOFT_EXPIRE 2
273
274enum {
275 XFRM_STATE_VOID,
276 XFRM_STATE_ACQ,
277 XFRM_STATE_VALID,
278 XFRM_STATE_ERROR,
279 XFRM_STATE_EXPIRED,
280 XFRM_STATE_DEAD
281};
282
283
284struct km_event {
285 union {
286 u32 hard;
287 u32 proto;
288 u32 byid;
289 u32 aevent;
290 u32 type;
291 } data;
292
293 u32 seq;
294 u32 portid;
295 u32 event;
296 struct net *net;
297};
298
299struct xfrm_replay {
300 void (*advance)(struct xfrm_state *x, __be32 net_seq);
301 int (*check)(struct xfrm_state *x,
302 struct sk_buff *skb,
303 __be32 net_seq);
304 int (*recheck)(struct xfrm_state *x,
305 struct sk_buff *skb,
306 __be32 net_seq);
307 void (*notify)(struct xfrm_state *x, int event);
308 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
309};
310
311struct xfrm_if_cb {
312 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
313 unsigned short family);
314};
315
316void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
317void xfrm_if_unregister_cb(void);
318
319struct net_device;
320struct xfrm_type;
321struct xfrm_dst;
322struct xfrm_policy_afinfo {
323 struct dst_ops *dst_ops;
324 struct dst_entry *(*dst_lookup)(struct net *net,
325 int tos, int oif,
326 const xfrm_address_t *saddr,
327 const xfrm_address_t *daddr,
328 u32 mark);
329 int (*get_saddr)(struct net *net, int oif,
330 xfrm_address_t *saddr,
331 xfrm_address_t *daddr,
332 u32 mark);
333 int (*fill_dst)(struct xfrm_dst *xdst,
334 struct net_device *dev,
335 const struct flowi *fl);
336 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
337};
338
339int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
340void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
341void km_policy_notify(struct xfrm_policy *xp, int dir,
342 const struct km_event *c);
343void km_state_notify(struct xfrm_state *x, const struct km_event *c);
344
345struct xfrm_tmpl;
346int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
347 struct xfrm_policy *pol);
348void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
349int __xfrm_state_delete(struct xfrm_state *x);
350
351struct xfrm_state_afinfo {
352 u8 family;
353 u8 proto;
354
355 const struct xfrm_type_offload *type_offload_esp;
356
357 const struct xfrm_type *type_esp;
358 const struct xfrm_type *type_ipip;
359 const struct xfrm_type *type_ipip6;
360 const struct xfrm_type *type_comp;
361 const struct xfrm_type *type_ah;
362 const struct xfrm_type *type_routing;
363 const struct xfrm_type *type_dstopts;
364
365 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
366 int (*transport_finish)(struct sk_buff *skb,
367 int async);
368 void (*local_error)(struct sk_buff *skb, u32 mtu);
369};
370
371int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
372int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
373struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
374struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
375
376struct xfrm_input_afinfo {
377 u8 family;
378 bool is_ipip;
379 int (*callback)(struct sk_buff *skb, u8 protocol,
380 int err);
381};
382
383int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
384int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
385
386void xfrm_flush_gc(void);
387void xfrm_state_delete_tunnel(struct xfrm_state *x);
388
389struct xfrm_type {
390 char *description;
391 struct module *owner;
392 u8 proto;
393 u8 flags;
394#define XFRM_TYPE_NON_FRAGMENT 1
395#define XFRM_TYPE_REPLAY_PROT 2
396#define XFRM_TYPE_LOCAL_COADDR 4
397#define XFRM_TYPE_REMOTE_COADDR 8
398
399 int (*init_state)(struct xfrm_state *x);
400 void (*destructor)(struct xfrm_state *);
401 int (*input)(struct xfrm_state *, struct sk_buff *skb);
402 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
403 int (*reject)(struct xfrm_state *, struct sk_buff *,
404 const struct flowi *);
405 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
406};
407
408int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
409void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
410
411struct xfrm_type_offload {
412 char *description;
413 struct module *owner;
414 u8 proto;
415 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
416 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
417 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
418};
419
420int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
421void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
422
423static inline int xfrm_af2proto(unsigned int family)
424{
425 switch(family) {
426 case AF_INET:
427 return IPPROTO_IPIP;
428 case AF_INET6:
429 return IPPROTO_IPV6;
430 default:
431 return 0;
432 }
433}
434
435static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
436{
437 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
438 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
439 return &x->inner_mode;
440 else
441 return &x->inner_mode_iaf;
442}
443
444struct xfrm_tmpl {
445
446
447
448
449
450
451 struct xfrm_id id;
452
453
454 xfrm_address_t saddr;
455
456 unsigned short encap_family;
457
458 u32 reqid;
459
460
461 u8 mode;
462
463
464 u8 share;
465
466
467 u8 optional;
468
469
470 u8 allalgs;
471
472
473 u32 aalgos;
474 u32 ealgos;
475 u32 calgos;
476};
477
478#define XFRM_MAX_DEPTH 6
479#define XFRM_MAX_OFFLOAD_DEPTH 1
480
481struct xfrm_policy_walk_entry {
482 struct list_head all;
483 u8 dead;
484};
485
486struct xfrm_policy_walk {
487 struct xfrm_policy_walk_entry walk;
488 u8 type;
489 u32 seq;
490};
491
492struct xfrm_policy_queue {
493 struct sk_buff_head hold_queue;
494 struct timer_list hold_timer;
495 unsigned long timeout;
496};
497
498struct xfrm_policy {
499 possible_net_t xp_net;
500 struct hlist_node bydst;
501 struct hlist_node byidx;
502
503
504 rwlock_t lock;
505 refcount_t refcnt;
506 u32 pos;
507 struct timer_list timer;
508
509 atomic_t genid;
510 u32 priority;
511 u32 index;
512 u32 if_id;
513 struct xfrm_mark mark;
514 struct xfrm_selector selector;
515 struct xfrm_lifetime_cfg lft;
516 struct xfrm_lifetime_cur curlft;
517 struct xfrm_policy_walk_entry walk;
518 struct xfrm_policy_queue polq;
519 bool bydst_reinsert;
520 u8 type;
521 u8 action;
522 u8 flags;
523 u8 xfrm_nr;
524 u16 family;
525 struct xfrm_sec_ctx *security;
526 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
527 struct hlist_node bydst_inexact_list;
528 struct rcu_head rcu;
529};
530
531static inline struct net *xp_net(const struct xfrm_policy *xp)
532{
533 return read_pnet(&xp->xp_net);
534}
535
536struct xfrm_kmaddress {
537 xfrm_address_t local;
538 xfrm_address_t remote;
539 u32 reserved;
540 u16 family;
541};
542
543struct xfrm_migrate {
544 xfrm_address_t old_daddr;
545 xfrm_address_t old_saddr;
546 xfrm_address_t new_daddr;
547 xfrm_address_t new_saddr;
548 u8 proto;
549 u8 mode;
550 u16 reserved;
551 u32 reqid;
552 u16 old_family;
553 u16 new_family;
554};
555
556#define XFRM_KM_TIMEOUT 30
557
558#define XFRM_REPLAY_UPDATE XFRM_AE_CR
559#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
560
561
562#define XFRM_AE_ETIME 10
563
564#define XFRM_AE_ETH_M 10
565
566#define XFRM_AE_SEQT_SIZE 2
567
568struct xfrm_mgr {
569 struct list_head list;
570 int (*notify)(struct xfrm_state *x, const struct km_event *c);
571 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
572 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
573 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
574 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
575 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
576 int (*migrate)(const struct xfrm_selector *sel,
577 u8 dir, u8 type,
578 const struct xfrm_migrate *m,
579 int num_bundles,
580 const struct xfrm_kmaddress *k,
581 const struct xfrm_encap_tmpl *encap);
582 bool (*is_alive)(const struct km_event *c);
583};
584
585int xfrm_register_km(struct xfrm_mgr *km);
586int xfrm_unregister_km(struct xfrm_mgr *km);
587
588struct xfrm_tunnel_skb_cb {
589 union {
590 struct inet_skb_parm h4;
591 struct inet6_skb_parm h6;
592 } header;
593
594 union {
595 struct ip_tunnel *ip4;
596 struct ip6_tnl *ip6;
597 } tunnel;
598};
599
600#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
601
602
603
604
605
606
607struct xfrm_skb_cb {
608 struct xfrm_tunnel_skb_cb header;
609
610
611 union {
612 struct {
613 __u32 low;
614 __u32 hi;
615 } output;
616 struct {
617 __be32 low;
618 __be32 hi;
619 } input;
620 } seq;
621};
622
623#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
624
625
626
627
628
629struct xfrm_mode_skb_cb {
630 struct xfrm_tunnel_skb_cb header;
631
632
633 __be16 id;
634 __be16 frag_off;
635
636
637 u8 ihl;
638
639
640 u8 tos;
641
642
643 u8 ttl;
644
645
646 u8 protocol;
647
648
649 u8 optlen;
650
651
652 u8 flow_lbl[3];
653};
654
655#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
656
657
658
659
660
661struct xfrm_spi_skb_cb {
662 struct xfrm_tunnel_skb_cb header;
663
664 unsigned int daddroff;
665 unsigned int family;
666 __be32 seq;
667};
668
669#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
670
671#ifdef CONFIG_AUDITSYSCALL
672static inline struct audit_buffer *xfrm_audit_start(const char *op)
673{
674 struct audit_buffer *audit_buf = NULL;
675
676 if (audit_enabled == AUDIT_OFF)
677 return NULL;
678 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
679 AUDIT_MAC_IPSEC_EVENT);
680 if (audit_buf == NULL)
681 return NULL;
682 audit_log_format(audit_buf, "op=%s", op);
683 return audit_buf;
684}
685
686static inline void xfrm_audit_helper_usrinfo(bool task_valid,
687 struct audit_buffer *audit_buf)
688{
689 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
690 audit_get_loginuid(current) :
691 INVALID_UID);
692 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
693 AUDIT_SID_UNSET;
694
695 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
696 audit_log_task_context(audit_buf);
697}
698
699void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
700void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
701 bool task_valid);
702void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
703void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
704void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
705 struct sk_buff *skb);
706void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
707 __be32 net_seq);
708void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
709void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
710 __be32 net_seq);
711void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
712 u8 proto);
713#else
714
715static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
716 bool task_valid)
717{
718}
719
720static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
721 bool task_valid)
722{
723}
724
725static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
726 bool task_valid)
727{
728}
729
730static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
731 bool task_valid)
732{
733}
734
735static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
736 struct sk_buff *skb)
737{
738}
739
740static inline void xfrm_audit_state_replay(struct xfrm_state *x,
741 struct sk_buff *skb, __be32 net_seq)
742{
743}
744
745static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
746 u16 family)
747{
748}
749
750static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
751 __be32 net_spi, __be32 net_seq)
752{
753}
754
755static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
756 struct sk_buff *skb, u8 proto)
757{
758}
759#endif
760
761static inline void xfrm_pol_hold(struct xfrm_policy *policy)
762{
763 if (likely(policy != NULL))
764 refcount_inc(&policy->refcnt);
765}
766
767void xfrm_policy_destroy(struct xfrm_policy *policy);
768
769static inline void xfrm_pol_put(struct xfrm_policy *policy)
770{
771 if (refcount_dec_and_test(&policy->refcnt))
772 xfrm_policy_destroy(policy);
773}
774
775static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
776{
777 int i;
778 for (i = npols - 1; i >= 0; --i)
779 xfrm_pol_put(pols[i]);
780}
781
782void __xfrm_state_destroy(struct xfrm_state *, bool);
783
784static inline void __xfrm_state_put(struct xfrm_state *x)
785{
786 refcount_dec(&x->refcnt);
787}
788
789static inline void xfrm_state_put(struct xfrm_state *x)
790{
791 if (refcount_dec_and_test(&x->refcnt))
792 __xfrm_state_destroy(x, false);
793}
794
795static inline void xfrm_state_put_sync(struct xfrm_state *x)
796{
797 if (refcount_dec_and_test(&x->refcnt))
798 __xfrm_state_destroy(x, true);
799}
800
801static inline void xfrm_state_hold(struct xfrm_state *x)
802{
803 refcount_inc(&x->refcnt);
804}
805
806static inline bool addr_match(const void *token1, const void *token2,
807 unsigned int prefixlen)
808{
809 const __be32 *a1 = token1;
810 const __be32 *a2 = token2;
811 unsigned int pdw;
812 unsigned int pbi;
813
814 pdw = prefixlen >> 5;
815 pbi = prefixlen & 0x1f;
816
817 if (pdw)
818 if (memcmp(a1, a2, pdw << 2))
819 return false;
820
821 if (pbi) {
822 __be32 mask;
823
824 mask = htonl((0xffffffff) << (32 - pbi));
825
826 if ((a1[pdw] ^ a2[pdw]) & mask)
827 return false;
828 }
829
830 return true;
831}
832
833static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
834{
835
836 if (sizeof(long) == 4 && prefixlen == 0)
837 return true;
838 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
839}
840
841static __inline__
842__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
843{
844 __be16 port;
845 switch(fl->flowi_proto) {
846 case IPPROTO_TCP:
847 case IPPROTO_UDP:
848 case IPPROTO_UDPLITE:
849 case IPPROTO_SCTP:
850 port = uli->ports.sport;
851 break;
852 case IPPROTO_ICMP:
853 case IPPROTO_ICMPV6:
854 port = htons(uli->icmpt.type);
855 break;
856 case IPPROTO_MH:
857 port = htons(uli->mht.type);
858 break;
859 case IPPROTO_GRE:
860 port = htons(ntohl(uli->gre_key) >> 16);
861 break;
862 default:
863 port = 0;
864 }
865 return port;
866}
867
868static __inline__
869__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
870{
871 __be16 port;
872 switch(fl->flowi_proto) {
873 case IPPROTO_TCP:
874 case IPPROTO_UDP:
875 case IPPROTO_UDPLITE:
876 case IPPROTO_SCTP:
877 port = uli->ports.dport;
878 break;
879 case IPPROTO_ICMP:
880 case IPPROTO_ICMPV6:
881 port = htons(uli->icmpt.code);
882 break;
883 case IPPROTO_GRE:
884 port = htons(ntohl(uli->gre_key) & 0xffff);
885 break;
886 default:
887 port = 0;
888 }
889 return port;
890}
891
892bool xfrm_selector_match(const struct xfrm_selector *sel,
893 const struct flowi *fl, unsigned short family);
894
895#ifdef CONFIG_SECURITY_NETWORK_XFRM
896
897
898
899static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
900{
901 return ((!s1 && !s2) ||
902 (s1 && s2 &&
903 (s1->ctx_sid == s2->ctx_sid) &&
904 (s1->ctx_doi == s2->ctx_doi) &&
905 (s1->ctx_alg == s2->ctx_alg)));
906}
907#else
908static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
909{
910 return true;
911}
912#endif
913
914
915
916
917
918
919
920
921
922
923
924
925struct xfrm_dst {
926 union {
927 struct dst_entry dst;
928 struct rtable rt;
929 struct rt6_info rt6;
930 } u;
931 struct dst_entry *route;
932 struct dst_entry *child;
933 struct dst_entry *path;
934 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
935 int num_pols, num_xfrms;
936 u32 xfrm_genid;
937 u32 policy_genid;
938 u32 route_mtu_cached;
939 u32 child_mtu_cached;
940 u32 route_cookie;
941 u32 path_cookie;
942};
943
944static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
945{
946#ifdef CONFIG_XFRM
947 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
948 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
949
950 return xdst->path;
951 }
952#endif
953 return (struct dst_entry *) dst;
954}
955
956static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
957{
958#ifdef CONFIG_XFRM
959 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
960 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
961 return xdst->child;
962 }
963#endif
964 return NULL;
965}
966
967#ifdef CONFIG_XFRM
968static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
969{
970 xdst->child = child;
971}
972
973static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
974{
975 xfrm_pols_put(xdst->pols, xdst->num_pols);
976 dst_release(xdst->route);
977 if (likely(xdst->u.dst.xfrm))
978 xfrm_state_put(xdst->u.dst.xfrm);
979}
980#endif
981
982void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
983
984struct xfrm_if_parms {
985 int link;
986 u32 if_id;
987};
988
989struct xfrm_if {
990 struct xfrm_if __rcu *next;
991 struct net_device *dev;
992 struct net *net;
993 struct xfrm_if_parms p;
994
995 struct gro_cells gro_cells;
996};
997
998struct xfrm_offload {
999
1000 struct {
1001 __u32 low;
1002 __u32 hi;
1003 } seq;
1004
1005 __u32 flags;
1006#define SA_DELETE_REQ 1
1007#define CRYPTO_DONE 2
1008#define CRYPTO_NEXT_DONE 4
1009#define CRYPTO_FALLBACK 8
1010#define XFRM_GSO_SEGMENT 16
1011#define XFRM_GRO 32
1012#define XFRM_ESP_NO_TRAILER 64
1013#define XFRM_DEV_RESUME 128
1014#define XFRM_XMIT 256
1015
1016 __u32 status;
1017#define CRYPTO_SUCCESS 1
1018#define CRYPTO_GENERIC_ERROR 2
1019#define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1020#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1021#define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1022#define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1023#define CRYPTO_INVALID_PACKET_SYNTAX 64
1024#define CRYPTO_INVALID_PROTOCOL 128
1025
1026 __u8 proto;
1027};
1028
1029struct sec_path {
1030 int len;
1031 int olen;
1032
1033 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1034 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1035};
1036
1037struct sec_path *secpath_set(struct sk_buff *skb);
1038
1039static inline void
1040secpath_reset(struct sk_buff *skb)
1041{
1042#ifdef CONFIG_XFRM
1043 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1044#endif
1045}
1046
1047static inline int
1048xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1049{
1050 switch (family) {
1051 case AF_INET:
1052 return addr->a4 == 0;
1053 case AF_INET6:
1054 return ipv6_addr_any(&addr->in6);
1055 }
1056 return 0;
1057}
1058
1059static inline int
1060__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1061{
1062 return (tmpl->saddr.a4 &&
1063 tmpl->saddr.a4 != x->props.saddr.a4);
1064}
1065
1066static inline int
1067__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1068{
1069 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1070 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1071}
1072
1073static inline int
1074xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1075{
1076 switch (family) {
1077 case AF_INET:
1078 return __xfrm4_state_addr_cmp(tmpl, x);
1079 case AF_INET6:
1080 return __xfrm6_state_addr_cmp(tmpl, x);
1081 }
1082 return !0;
1083}
1084
1085#ifdef CONFIG_XFRM
1086int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1087 unsigned short family);
1088
1089static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1090 struct sk_buff *skb,
1091 unsigned int family, int reverse)
1092{
1093 struct net *net = dev_net(skb->dev);
1094 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1095
1096 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1097 return __xfrm_policy_check(sk, ndir, skb, family);
1098
1099 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1100 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1101 __xfrm_policy_check(sk, ndir, skb, family);
1102}
1103
1104static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1105{
1106 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1107}
1108
1109static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1110{
1111 return xfrm_policy_check(sk, dir, skb, AF_INET);
1112}
1113
1114static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1115{
1116 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1117}
1118
1119static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1120 struct sk_buff *skb)
1121{
1122 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1123}
1124
1125static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1126 struct sk_buff *skb)
1127{
1128 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1129}
1130
1131int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1132 unsigned int family, int reverse);
1133
1134static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1135 unsigned int family)
1136{
1137 return __xfrm_decode_session(skb, fl, family, 0);
1138}
1139
1140static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1141 struct flowi *fl,
1142 unsigned int family)
1143{
1144 return __xfrm_decode_session(skb, fl, family, 1);
1145}
1146
1147int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1148
1149static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1150{
1151 struct net *net = dev_net(skb->dev);
1152
1153 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1154 (skb_dst(skb)->flags & DST_NOXFRM) ||
1155 __xfrm_route_forward(skb, family);
1156}
1157
1158static inline int xfrm4_route_forward(struct sk_buff *skb)
1159{
1160 return xfrm_route_forward(skb, AF_INET);
1161}
1162
1163static inline int xfrm6_route_forward(struct sk_buff *skb)
1164{
1165 return xfrm_route_forward(skb, AF_INET6);
1166}
1167
1168int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1169
1170static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1171{
1172 sk->sk_policy[0] = NULL;
1173 sk->sk_policy[1] = NULL;
1174 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1175 return __xfrm_sk_clone_policy(sk, osk);
1176 return 0;
1177}
1178
1179int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1180
1181static inline void xfrm_sk_free_policy(struct sock *sk)
1182{
1183 struct xfrm_policy *pol;
1184
1185 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1186 if (unlikely(pol != NULL)) {
1187 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1188 sk->sk_policy[0] = NULL;
1189 }
1190 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1191 if (unlikely(pol != NULL)) {
1192 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1193 sk->sk_policy[1] = NULL;
1194 }
1195}
1196
1197#else
1198
1199static inline void xfrm_sk_free_policy(struct sock *sk) {}
1200static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1201static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1202static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1203static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1204{
1205 return 1;
1206}
1207static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1208{
1209 return 1;
1210}
1211static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1212{
1213 return 1;
1214}
1215static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1216 struct flowi *fl,
1217 unsigned int family)
1218{
1219 return -ENOSYS;
1220}
1221static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1222 struct sk_buff *skb)
1223{
1224 return 1;
1225}
1226static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1227 struct sk_buff *skb)
1228{
1229 return 1;
1230}
1231#endif
1232
1233static __inline__
1234xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1235{
1236 switch (family){
1237 case AF_INET:
1238 return (xfrm_address_t *)&fl->u.ip4.daddr;
1239 case AF_INET6:
1240 return (xfrm_address_t *)&fl->u.ip6.daddr;
1241 }
1242 return NULL;
1243}
1244
1245static __inline__
1246xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1247{
1248 switch (family){
1249 case AF_INET:
1250 return (xfrm_address_t *)&fl->u.ip4.saddr;
1251 case AF_INET6:
1252 return (xfrm_address_t *)&fl->u.ip6.saddr;
1253 }
1254 return NULL;
1255}
1256
1257static __inline__
1258void xfrm_flowi_addr_get(const struct flowi *fl,
1259 xfrm_address_t *saddr, xfrm_address_t *daddr,
1260 unsigned short family)
1261{
1262 switch(family) {
1263 case AF_INET:
1264 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1265 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1266 break;
1267 case AF_INET6:
1268 saddr->in6 = fl->u.ip6.saddr;
1269 daddr->in6 = fl->u.ip6.daddr;
1270 break;
1271 }
1272}
1273
1274static __inline__ int
1275__xfrm4_state_addr_check(const struct xfrm_state *x,
1276 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1277{
1278 if (daddr->a4 == x->id.daddr.a4 &&
1279 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1280 return 1;
1281 return 0;
1282}
1283
1284static __inline__ int
1285__xfrm6_state_addr_check(const struct xfrm_state *x,
1286 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1287{
1288 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1289 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1290 ipv6_addr_any((struct in6_addr *)saddr) ||
1291 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1292 return 1;
1293 return 0;
1294}
1295
1296static __inline__ int
1297xfrm_state_addr_check(const struct xfrm_state *x,
1298 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1299 unsigned short family)
1300{
1301 switch (family) {
1302 case AF_INET:
1303 return __xfrm4_state_addr_check(x, daddr, saddr);
1304 case AF_INET6:
1305 return __xfrm6_state_addr_check(x, daddr, saddr);
1306 }
1307 return 0;
1308}
1309
1310static __inline__ int
1311xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1312 unsigned short family)
1313{
1314 switch (family) {
1315 case AF_INET:
1316 return __xfrm4_state_addr_check(x,
1317 (const xfrm_address_t *)&fl->u.ip4.daddr,
1318 (const xfrm_address_t *)&fl->u.ip4.saddr);
1319 case AF_INET6:
1320 return __xfrm6_state_addr_check(x,
1321 (const xfrm_address_t *)&fl->u.ip6.daddr,
1322 (const xfrm_address_t *)&fl->u.ip6.saddr);
1323 }
1324 return 0;
1325}
1326
1327static inline int xfrm_state_kern(const struct xfrm_state *x)
1328{
1329 return atomic_read(&x->tunnel_users);
1330}
1331
1332static inline bool xfrm_id_proto_valid(u8 proto)
1333{
1334 switch (proto) {
1335 case IPPROTO_AH:
1336 case IPPROTO_ESP:
1337 case IPPROTO_COMP:
1338#if IS_ENABLED(CONFIG_IPV6)
1339 case IPPROTO_ROUTING:
1340 case IPPROTO_DSTOPTS:
1341#endif
1342 return true;
1343 default:
1344 return false;
1345 }
1346}
1347
1348
1349static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1350{
1351 return (!userproto || proto == userproto ||
1352 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1353 proto == IPPROTO_ESP ||
1354 proto == IPPROTO_COMP)));
1355}
1356
1357
1358
1359
1360struct xfrm_algo_aead_info {
1361 char *geniv;
1362 u16 icv_truncbits;
1363};
1364
1365struct xfrm_algo_auth_info {
1366 u16 icv_truncbits;
1367 u16 icv_fullbits;
1368};
1369
1370struct xfrm_algo_encr_info {
1371 char *geniv;
1372 u16 blockbits;
1373 u16 defkeybits;
1374};
1375
1376struct xfrm_algo_comp_info {
1377 u16 threshold;
1378};
1379
1380struct xfrm_algo_desc {
1381 char *name;
1382 char *compat;
1383 u8 available:1;
1384 u8 pfkey_supported:1;
1385 union {
1386 struct xfrm_algo_aead_info aead;
1387 struct xfrm_algo_auth_info auth;
1388 struct xfrm_algo_encr_info encr;
1389 struct xfrm_algo_comp_info comp;
1390 } uinfo;
1391 struct sadb_alg desc;
1392};
1393
1394
1395struct xfrm4_protocol {
1396 int (*handler)(struct sk_buff *skb);
1397 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1398 int encap_type);
1399 int (*cb_handler)(struct sk_buff *skb, int err);
1400 int (*err_handler)(struct sk_buff *skb, u32 info);
1401
1402 struct xfrm4_protocol __rcu *next;
1403 int priority;
1404};
1405
1406struct xfrm6_protocol {
1407 int (*handler)(struct sk_buff *skb);
1408 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1409 int encap_type);
1410 int (*cb_handler)(struct sk_buff *skb, int err);
1411 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1412 u8 type, u8 code, int offset, __be32 info);
1413
1414 struct xfrm6_protocol __rcu *next;
1415 int priority;
1416};
1417
1418
1419struct xfrm_tunnel {
1420 int (*handler)(struct sk_buff *skb);
1421 int (*cb_handler)(struct sk_buff *skb, int err);
1422 int (*err_handler)(struct sk_buff *skb, u32 info);
1423
1424 struct xfrm_tunnel __rcu *next;
1425 int priority;
1426};
1427
1428struct xfrm6_tunnel {
1429 int (*handler)(struct sk_buff *skb);
1430 int (*cb_handler)(struct sk_buff *skb, int err);
1431 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1432 u8 type, u8 code, int offset, __be32 info);
1433 struct xfrm6_tunnel __rcu *next;
1434 int priority;
1435};
1436
1437void xfrm_init(void);
1438void xfrm4_init(void);
1439int xfrm_state_init(struct net *net);
1440void xfrm_state_fini(struct net *net);
1441void xfrm4_state_init(void);
1442void xfrm4_protocol_init(void);
1443#ifdef CONFIG_XFRM
1444int xfrm6_init(void);
1445void xfrm6_fini(void);
1446int xfrm6_state_init(void);
1447void xfrm6_state_fini(void);
1448int xfrm6_protocol_init(void);
1449void xfrm6_protocol_fini(void);
1450#else
1451static inline int xfrm6_init(void)
1452{
1453 return 0;
1454}
1455static inline void xfrm6_fini(void)
1456{
1457 ;
1458}
1459#endif
1460
1461#ifdef CONFIG_XFRM_STATISTICS
1462int xfrm_proc_init(struct net *net);
1463void xfrm_proc_fini(struct net *net);
1464#endif
1465
1466int xfrm_sysctl_init(struct net *net);
1467#ifdef CONFIG_SYSCTL
1468void xfrm_sysctl_fini(struct net *net);
1469#else
1470static inline void xfrm_sysctl_fini(struct net *net)
1471{
1472}
1473#endif
1474
1475void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1476 struct xfrm_address_filter *filter);
1477int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1478 int (*func)(struct xfrm_state *, int, void*), void *);
1479void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1480struct xfrm_state *xfrm_state_alloc(struct net *net);
1481void xfrm_state_free(struct xfrm_state *x);
1482struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1483 const xfrm_address_t *saddr,
1484 const struct flowi *fl,
1485 struct xfrm_tmpl *tmpl,
1486 struct xfrm_policy *pol, int *err,
1487 unsigned short family, u32 if_id);
1488struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1489 xfrm_address_t *daddr,
1490 xfrm_address_t *saddr,
1491 unsigned short family,
1492 u8 mode, u8 proto, u32 reqid);
1493struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1494 unsigned short family);
1495int xfrm_state_check_expire(struct xfrm_state *x);
1496void xfrm_state_insert(struct xfrm_state *x);
1497int xfrm_state_add(struct xfrm_state *x);
1498int xfrm_state_update(struct xfrm_state *x);
1499struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1500 const xfrm_address_t *daddr, __be32 spi,
1501 u8 proto, unsigned short family);
1502struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1503 const xfrm_address_t *daddr,
1504 const xfrm_address_t *saddr,
1505 u8 proto,
1506 unsigned short family);
1507#ifdef CONFIG_XFRM_SUB_POLICY
1508void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1509 unsigned short family);
1510void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1511 unsigned short family);
1512#else
1513static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1514 int n, unsigned short family)
1515{
1516}
1517
1518static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1519 int n, unsigned short family)
1520{
1521}
1522#endif
1523
1524struct xfrmk_sadinfo {
1525 u32 sadhcnt;
1526 u32 sadhmcnt;
1527 u32 sadcnt;
1528};
1529
1530struct xfrmk_spdinfo {
1531 u32 incnt;
1532 u32 outcnt;
1533 u32 fwdcnt;
1534 u32 inscnt;
1535 u32 outscnt;
1536 u32 fwdscnt;
1537 u32 spdhcnt;
1538 u32 spdhmcnt;
1539};
1540
1541struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1542int xfrm_state_delete(struct xfrm_state *x);
1543int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1544int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1545void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1546void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1547u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1548int xfrm_init_replay(struct xfrm_state *x);
1549u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1550int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1551int xfrm_init_state(struct xfrm_state *x);
1552int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1553int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1554int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
1555 int (*finish)(struct net *, struct sock *,
1556 struct sk_buff *));
1557int xfrm_trans_queue(struct sk_buff *skb,
1558 int (*finish)(struct net *, struct sock *,
1559 struct sk_buff *));
1560int xfrm_output_resume(struct sk_buff *skb, int err);
1561int xfrm_output(struct sock *sk, struct sk_buff *skb);
1562
1563#if IS_ENABLED(CONFIG_NET_PKTGEN)
1564int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1565#endif
1566
1567void xfrm_local_error(struct sk_buff *skb, int mtu);
1568int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1569int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1570 int encap_type);
1571int xfrm4_transport_finish(struct sk_buff *skb, int async);
1572int xfrm4_rcv(struct sk_buff *skb);
1573int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1574
1575static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1576{
1577 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1578 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1579 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1580 return xfrm_input(skb, nexthdr, spi, 0);
1581}
1582
1583int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1584int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1585int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1586int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1587int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1588int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1589void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1590int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1591int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1592 struct ip6_tnl *t);
1593int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1594 int encap_type);
1595int xfrm6_transport_finish(struct sk_buff *skb, int async);
1596int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1597int xfrm6_rcv(struct sk_buff *skb);
1598int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1599 xfrm_address_t *saddr, u8 proto);
1600void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1601int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1602int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1603int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1604int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1605__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1606__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1607int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1608int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1609int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1610 u8 **prevhdr);
1611
1612#ifdef CONFIG_XFRM
1613void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu);
1614int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1615int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1616int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval,
1617 int optlen);
1618#else
1619static inline int xfrm_user_policy(struct sock *sk, int optname,
1620 sockptr_t optval, int optlen)
1621{
1622 return -ENOPROTOOPT;
1623}
1624#endif
1625
1626struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1627 const xfrm_address_t *saddr,
1628 const xfrm_address_t *daddr,
1629 int family, u32 mark);
1630
1631struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1632
1633void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1634int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1635 int (*func)(struct xfrm_policy *, int, int, void*),
1636 void *);
1637void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1638int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1639struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net,
1640 const struct xfrm_mark *mark,
1641 u32 if_id, u8 type, int dir,
1642 struct xfrm_selector *sel,
1643 struct xfrm_sec_ctx *ctx, int delete,
1644 int *err);
1645struct xfrm_policy *xfrm_policy_byid(struct net *net,
1646 const struct xfrm_mark *mark, u32 if_id,
1647 u8 type, int dir, u32 id, int delete,
1648 int *err);
1649int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1650void xfrm_policy_hash_rebuild(struct net *net);
1651u32 xfrm_get_acqseq(void);
1652int verify_spi_info(u8 proto, u32 min, u32 max);
1653int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1654struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1655 u8 mode, u32 reqid, u32 if_id, u8 proto,
1656 const xfrm_address_t *daddr,
1657 const xfrm_address_t *saddr, int create,
1658 unsigned short family);
1659int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1660
1661#ifdef CONFIG_XFRM_MIGRATE
1662int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1663 const struct xfrm_migrate *m, int num_bundles,
1664 const struct xfrm_kmaddress *k,
1665 const struct xfrm_encap_tmpl *encap);
1666struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1667struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1668 struct xfrm_migrate *m,
1669 struct xfrm_encap_tmpl *encap);
1670int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1671 struct xfrm_migrate *m, int num_bundles,
1672 struct xfrm_kmaddress *k, struct net *net,
1673 struct xfrm_encap_tmpl *encap);
1674#endif
1675
1676int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1677void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1678int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1679 xfrm_address_t *addr);
1680
1681void xfrm_input_init(void);
1682int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1683
1684void xfrm_probe_algs(void);
1685int xfrm_count_pfkey_auth_supported(void);
1686int xfrm_count_pfkey_enc_supported(void);
1687struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1688struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1689struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1690struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1691struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1692struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1693struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1694struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1695struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1696 int probe);
1697
1698static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1699 const xfrm_address_t *b)
1700{
1701 return ipv6_addr_equal((const struct in6_addr *)a,
1702 (const struct in6_addr *)b);
1703}
1704
1705static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1706 const xfrm_address_t *b,
1707 sa_family_t family)
1708{
1709 switch (family) {
1710 default:
1711 case AF_INET:
1712 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1713 case AF_INET6:
1714 return xfrm6_addr_equal(a, b);
1715 }
1716}
1717
1718static inline int xfrm_policy_id2dir(u32 index)
1719{
1720 return index & 7;
1721}
1722
1723#ifdef CONFIG_XFRM
1724static inline int xfrm_aevent_is_on(struct net *net)
1725{
1726 struct sock *nlsk;
1727 int ret = 0;
1728
1729 rcu_read_lock();
1730 nlsk = rcu_dereference(net->xfrm.nlsk);
1731 if (nlsk)
1732 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1733 rcu_read_unlock();
1734 return ret;
1735}
1736
1737static inline int xfrm_acquire_is_on(struct net *net)
1738{
1739 struct sock *nlsk;
1740 int ret = 0;
1741
1742 rcu_read_lock();
1743 nlsk = rcu_dereference(net->xfrm.nlsk);
1744 if (nlsk)
1745 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1746 rcu_read_unlock();
1747
1748 return ret;
1749}
1750#endif
1751
1752static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1753{
1754 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1755}
1756
1757static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1758{
1759 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1760}
1761
1762static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1763{
1764 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1765}
1766
1767static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1768{
1769 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1770}
1771
1772#ifdef CONFIG_XFRM_MIGRATE
1773static inline int xfrm_replay_clone(struct xfrm_state *x,
1774 struct xfrm_state *orig)
1775{
1776
1777 x->replay_esn = kmemdup(orig->replay_esn,
1778 xfrm_replay_state_esn_len(orig->replay_esn),
1779 GFP_KERNEL);
1780 if (!x->replay_esn)
1781 return -ENOMEM;
1782 x->preplay_esn = kmemdup(orig->preplay_esn,
1783 xfrm_replay_state_esn_len(orig->preplay_esn),
1784 GFP_KERNEL);
1785 if (!x->preplay_esn)
1786 return -ENOMEM;
1787
1788 return 0;
1789}
1790
1791static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1792{
1793 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1794}
1795
1796
1797static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1798{
1799 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1800}
1801
1802static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1803{
1804 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1805}
1806
1807static inline void xfrm_states_put(struct xfrm_state **states, int n)
1808{
1809 int i;
1810 for (i = 0; i < n; i++)
1811 xfrm_state_put(*(states + i));
1812}
1813
1814static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1815{
1816 int i;
1817 for (i = 0; i < n; i++)
1818 xfrm_state_delete(*(states + i));
1819}
1820#endif
1821
1822#ifdef CONFIG_XFRM
1823static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1824{
1825 struct sec_path *sp = skb_sec_path(skb);
1826
1827 return sp->xvec[sp->len - 1];
1828}
1829#endif
1830
1831static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1832{
1833#ifdef CONFIG_XFRM
1834 struct sec_path *sp = skb_sec_path(skb);
1835
1836 if (!sp || !sp->olen || sp->len != sp->olen)
1837 return NULL;
1838
1839 return &sp->ovec[sp->olen - 1];
1840#else
1841 return NULL;
1842#endif
1843}
1844
1845void __init xfrm_dev_init(void);
1846
1847#ifdef CONFIG_XFRM_OFFLOAD
1848void xfrm_dev_resume(struct sk_buff *skb);
1849void xfrm_dev_backlog(struct softnet_data *sd);
1850struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1851int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1852 struct xfrm_user_offload *xuo);
1853bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1854
1855static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1856{
1857 struct xfrm_state_offload *xso = &x->xso;
1858
1859 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1860 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1861}
1862
1863static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1864{
1865 struct xfrm_state *x = dst->xfrm;
1866 struct xfrm_dst *xdst;
1867
1868 if (!x || !x->type_offload)
1869 return false;
1870
1871 xdst = (struct xfrm_dst *) dst;
1872 if (!x->xso.offload_handle && !xdst->child->xfrm)
1873 return true;
1874 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1875 !xdst->child->xfrm)
1876 return true;
1877
1878 return false;
1879}
1880
1881static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1882{
1883 struct xfrm_state_offload *xso = &x->xso;
1884
1885 if (xso->dev)
1886 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1887}
1888
1889static inline void xfrm_dev_state_free(struct xfrm_state *x)
1890{
1891 struct xfrm_state_offload *xso = &x->xso;
1892 struct net_device *dev = xso->dev;
1893
1894 if (dev && dev->xfrmdev_ops) {
1895 if (dev->xfrmdev_ops->xdo_dev_state_free)
1896 dev->xfrmdev_ops->xdo_dev_state_free(x);
1897 xso->dev = NULL;
1898 dev_put(dev);
1899 }
1900}
1901#else
1902static inline void xfrm_dev_resume(struct sk_buff *skb)
1903{
1904}
1905
1906static inline void xfrm_dev_backlog(struct softnet_data *sd)
1907{
1908}
1909
1910static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1911{
1912 return skb;
1913}
1914
1915static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1916{
1917 return 0;
1918}
1919
1920static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1921{
1922}
1923
1924static inline void xfrm_dev_state_free(struct xfrm_state *x)
1925{
1926}
1927
1928static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1929{
1930 return false;
1931}
1932
1933static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1934{
1935}
1936
1937static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1938{
1939 return false;
1940}
1941#endif
1942
1943static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1944{
1945 if (attrs[XFRMA_MARK])
1946 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1947 else
1948 m->v = m->m = 0;
1949
1950 return m->v & m->m;
1951}
1952
1953static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1954{
1955 int ret = 0;
1956
1957 if (m->m | m->v)
1958 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1959 return ret;
1960}
1961
1962static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1963{
1964 struct xfrm_mark *m = &x->props.smark;
1965
1966 return (m->v & m->m) | (mark & ~m->m);
1967}
1968
1969static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1970{
1971 int ret = 0;
1972
1973 if (if_id)
1974 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1975 return ret;
1976}
1977
1978static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1979 unsigned int family)
1980{
1981 bool tunnel = false;
1982
1983 switch(family) {
1984 case AF_INET:
1985 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1986 tunnel = true;
1987 break;
1988 case AF_INET6:
1989 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1990 tunnel = true;
1991 break;
1992 }
1993 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
1994 return -EINVAL;
1995
1996 return 0;
1997}
1998
1999#if IS_ENABLED(CONFIG_IPV6)
2000static inline bool xfrm6_local_dontfrag(const struct sock *sk)
2001{
2002 int proto;
2003
2004 if (!sk || sk->sk_family != AF_INET6)
2005 return false;
2006
2007 proto = sk->sk_protocol;
2008 if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
2009 return inet6_sk(sk)->dontfrag;
2010
2011 return false;
2012}
2013#endif
2014#endif
2015