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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
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
148enum xfrm_replay_mode {
149 XFRM_REPLAY_MODE_LEGACY,
150 XFRM_REPLAY_MODE_BMP,
151 XFRM_REPLAY_MODE_ESN,
152};
153
154
155struct xfrm_state {
156 possible_net_t xs_net;
157 union {
158 struct hlist_node gclist;
159 struct hlist_node bydst;
160 };
161 struct hlist_node bysrc;
162 struct hlist_node byspi;
163 struct hlist_node byseq;
164
165 refcount_t refcnt;
166 spinlock_t lock;
167
168 struct xfrm_id id;
169 struct xfrm_selector sel;
170 struct xfrm_mark mark;
171 u32 if_id;
172 u32 tfcpad;
173
174 u32 genid;
175
176
177 struct xfrm_state_walk km;
178
179
180 struct {
181 u32 reqid;
182 u8 mode;
183 u8 replay_window;
184 u8 aalgo, ealgo, calgo;
185 u8 flags;
186 u16 family;
187 xfrm_address_t saddr;
188 int header_len;
189 int trailer_len;
190 u32 extra_flags;
191 struct xfrm_mark smark;
192 } props;
193
194 struct xfrm_lifetime_cfg lft;
195
196
197 struct xfrm_algo_auth *aalg;
198 struct xfrm_algo *ealg;
199 struct xfrm_algo *calg;
200 struct xfrm_algo_aead *aead;
201 const char *geniv;
202
203
204 struct xfrm_encap_tmpl *encap;
205 struct sock __rcu *encap_sk;
206
207
208 xfrm_address_t *coaddr;
209
210
211 struct xfrm_state *tunnel;
212
213
214 atomic_t tunnel_users;
215
216
217 struct xfrm_replay_state replay;
218 struct xfrm_replay_state_esn *replay_esn;
219
220
221 struct xfrm_replay_state preplay;
222 struct xfrm_replay_state_esn *preplay_esn;
223
224
225 enum xfrm_replay_mode repl_mode;
226
227
228
229 u32 xflags;
230
231
232 u32 replay_maxage;
233 u32 replay_maxdiff;
234
235
236 struct timer_list rtimer;
237
238
239 struct xfrm_stats stats;
240
241 struct xfrm_lifetime_cur curlft;
242 struct hrtimer mtimer;
243
244 struct xfrm_state_offload xso;
245
246
247 long saved_tmo;
248
249
250 time64_t lastused;
251
252 struct page_frag xfrag;
253
254
255
256 const struct xfrm_type *type;
257 struct xfrm_mode inner_mode;
258 struct xfrm_mode inner_mode_iaf;
259 struct xfrm_mode outer_mode;
260
261 const struct xfrm_type_offload *type_offload;
262
263
264 struct xfrm_sec_ctx *security;
265
266
267
268 void *data;
269};
270
271static inline struct net *xs_net(struct xfrm_state *x)
272{
273 return read_pnet(&x->xs_net);
274}
275
276
277#define XFRM_TIME_DEFER 1
278#define XFRM_SOFT_EXPIRE 2
279
280enum {
281 XFRM_STATE_VOID,
282 XFRM_STATE_ACQ,
283 XFRM_STATE_VALID,
284 XFRM_STATE_ERROR,
285 XFRM_STATE_EXPIRED,
286 XFRM_STATE_DEAD
287};
288
289
290struct km_event {
291 union {
292 u32 hard;
293 u32 proto;
294 u32 byid;
295 u32 aevent;
296 u32 type;
297 } data;
298
299 u32 seq;
300 u32 portid;
301 u32 event;
302 struct net *net;
303};
304
305struct xfrm_if_cb {
306 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
307 unsigned short family);
308};
309
310void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
311void xfrm_if_unregister_cb(void);
312
313struct net_device;
314struct xfrm_type;
315struct xfrm_dst;
316struct xfrm_policy_afinfo {
317 struct dst_ops *dst_ops;
318 struct dst_entry *(*dst_lookup)(struct net *net,
319 int tos, int oif,
320 const xfrm_address_t *saddr,
321 const xfrm_address_t *daddr,
322 u32 mark);
323 int (*get_saddr)(struct net *net, int oif,
324 xfrm_address_t *saddr,
325 xfrm_address_t *daddr,
326 u32 mark);
327 int (*fill_dst)(struct xfrm_dst *xdst,
328 struct net_device *dev,
329 const struct flowi *fl);
330 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
331};
332
333int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
334void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
335void km_policy_notify(struct xfrm_policy *xp, int dir,
336 const struct km_event *c);
337void km_state_notify(struct xfrm_state *x, const struct km_event *c);
338
339struct xfrm_tmpl;
340int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
341 struct xfrm_policy *pol);
342void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
343int __xfrm_state_delete(struct xfrm_state *x);
344
345struct xfrm_state_afinfo {
346 u8 family;
347 u8 proto;
348
349 const struct xfrm_type_offload *type_offload_esp;
350
351 const struct xfrm_type *type_esp;
352 const struct xfrm_type *type_ipip;
353 const struct xfrm_type *type_ipip6;
354 const struct xfrm_type *type_comp;
355 const struct xfrm_type *type_ah;
356 const struct xfrm_type *type_routing;
357 const struct xfrm_type *type_dstopts;
358
359 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
360 int (*transport_finish)(struct sk_buff *skb,
361 int async);
362 void (*local_error)(struct sk_buff *skb, u32 mtu);
363};
364
365int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
366int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
367struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
368struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
369
370struct xfrm_input_afinfo {
371 u8 family;
372 bool is_ipip;
373 int (*callback)(struct sk_buff *skb, u8 protocol,
374 int err);
375};
376
377int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
378int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
379
380void xfrm_flush_gc(void);
381void xfrm_state_delete_tunnel(struct xfrm_state *x);
382
383struct xfrm_type {
384 struct module *owner;
385 u8 proto;
386 u8 flags;
387#define XFRM_TYPE_NON_FRAGMENT 1
388#define XFRM_TYPE_REPLAY_PROT 2
389#define XFRM_TYPE_LOCAL_COADDR 4
390#define XFRM_TYPE_REMOTE_COADDR 8
391
392 int (*init_state)(struct xfrm_state *x);
393 void (*destructor)(struct xfrm_state *);
394 int (*input)(struct xfrm_state *, struct sk_buff *skb);
395 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
396 int (*reject)(struct xfrm_state *, struct sk_buff *,
397 const struct flowi *);
398};
399
400int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
401void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
402
403struct xfrm_type_offload {
404 struct module *owner;
405 u8 proto;
406 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
407 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
408 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
409};
410
411int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
412void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
413
414static inline int xfrm_af2proto(unsigned int family)
415{
416 switch(family) {
417 case AF_INET:
418 return IPPROTO_IPIP;
419 case AF_INET6:
420 return IPPROTO_IPV6;
421 default:
422 return 0;
423 }
424}
425
426static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
427{
428 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
429 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
430 return &x->inner_mode;
431 else
432 return &x->inner_mode_iaf;
433}
434
435struct xfrm_tmpl {
436
437
438
439
440
441
442 struct xfrm_id id;
443
444
445 xfrm_address_t saddr;
446
447 unsigned short encap_family;
448
449 u32 reqid;
450
451
452 u8 mode;
453
454
455 u8 share;
456
457
458 u8 optional;
459
460
461 u8 allalgs;
462
463
464 u32 aalgos;
465 u32 ealgos;
466 u32 calgos;
467};
468
469#define XFRM_MAX_DEPTH 6
470#define XFRM_MAX_OFFLOAD_DEPTH 1
471
472struct xfrm_policy_walk_entry {
473 struct list_head all;
474 u8 dead;
475};
476
477struct xfrm_policy_walk {
478 struct xfrm_policy_walk_entry walk;
479 u8 type;
480 u32 seq;
481};
482
483struct xfrm_policy_queue {
484 struct sk_buff_head hold_queue;
485 struct timer_list hold_timer;
486 unsigned long timeout;
487};
488
489struct xfrm_policy {
490 possible_net_t xp_net;
491 struct hlist_node bydst;
492 struct hlist_node byidx;
493
494
495 rwlock_t lock;
496 refcount_t refcnt;
497 u32 pos;
498 struct timer_list timer;
499
500 atomic_t genid;
501 u32 priority;
502 u32 index;
503 u32 if_id;
504 struct xfrm_mark mark;
505 struct xfrm_selector selector;
506 struct xfrm_lifetime_cfg lft;
507 struct xfrm_lifetime_cur curlft;
508 struct xfrm_policy_walk_entry walk;
509 struct xfrm_policy_queue polq;
510 bool bydst_reinsert;
511 u8 type;
512 u8 action;
513 u8 flags;
514 u8 xfrm_nr;
515 u16 family;
516 struct xfrm_sec_ctx *security;
517 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
518 struct hlist_node bydst_inexact_list;
519 struct rcu_head rcu;
520};
521
522static inline struct net *xp_net(const struct xfrm_policy *xp)
523{
524 return read_pnet(&xp->xp_net);
525}
526
527struct xfrm_kmaddress {
528 xfrm_address_t local;
529 xfrm_address_t remote;
530 u32 reserved;
531 u16 family;
532};
533
534struct xfrm_migrate {
535 xfrm_address_t old_daddr;
536 xfrm_address_t old_saddr;
537 xfrm_address_t new_daddr;
538 xfrm_address_t new_saddr;
539 u8 proto;
540 u8 mode;
541 u16 reserved;
542 u32 reqid;
543 u16 old_family;
544 u16 new_family;
545};
546
547#define XFRM_KM_TIMEOUT 30
548
549#define XFRM_REPLAY_UPDATE XFRM_AE_CR
550#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
551
552
553#define XFRM_AE_ETIME 10
554
555#define XFRM_AE_ETH_M 10
556
557#define XFRM_AE_SEQT_SIZE 2
558
559struct xfrm_mgr {
560 struct list_head list;
561 int (*notify)(struct xfrm_state *x, const struct km_event *c);
562 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
563 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
564 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
565 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
566 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
567 int (*migrate)(const struct xfrm_selector *sel,
568 u8 dir, u8 type,
569 const struct xfrm_migrate *m,
570 int num_bundles,
571 const struct xfrm_kmaddress *k,
572 const struct xfrm_encap_tmpl *encap);
573 bool (*is_alive)(const struct km_event *c);
574};
575
576int xfrm_register_km(struct xfrm_mgr *km);
577int xfrm_unregister_km(struct xfrm_mgr *km);
578
579struct xfrm_tunnel_skb_cb {
580 union {
581 struct inet_skb_parm h4;
582 struct inet6_skb_parm h6;
583 } header;
584
585 union {
586 struct ip_tunnel *ip4;
587 struct ip6_tnl *ip6;
588 } tunnel;
589};
590
591#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
592
593
594
595
596
597
598struct xfrm_skb_cb {
599 struct xfrm_tunnel_skb_cb header;
600
601
602 union {
603 struct {
604 __u32 low;
605 __u32 hi;
606 } output;
607 struct {
608 __be32 low;
609 __be32 hi;
610 } input;
611 } seq;
612};
613
614#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
615
616
617
618
619
620struct xfrm_mode_skb_cb {
621 struct xfrm_tunnel_skb_cb header;
622
623
624 __be16 id;
625 __be16 frag_off;
626
627
628 u8 ihl;
629
630
631 u8 tos;
632
633
634 u8 ttl;
635
636
637 u8 protocol;
638
639
640 u8 optlen;
641
642
643 u8 flow_lbl[3];
644};
645
646#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
647
648
649
650
651
652struct xfrm_spi_skb_cb {
653 struct xfrm_tunnel_skb_cb header;
654
655 unsigned int daddroff;
656 unsigned int family;
657 __be32 seq;
658};
659
660#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
661
662#ifdef CONFIG_AUDITSYSCALL
663static inline struct audit_buffer *xfrm_audit_start(const char *op)
664{
665 struct audit_buffer *audit_buf = NULL;
666
667 if (audit_enabled == AUDIT_OFF)
668 return NULL;
669 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
670 AUDIT_MAC_IPSEC_EVENT);
671 if (audit_buf == NULL)
672 return NULL;
673 audit_log_format(audit_buf, "op=%s", op);
674 return audit_buf;
675}
676
677static inline void xfrm_audit_helper_usrinfo(bool task_valid,
678 struct audit_buffer *audit_buf)
679{
680 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
681 audit_get_loginuid(current) :
682 INVALID_UID);
683 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
684 AUDIT_SID_UNSET;
685
686 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
687 audit_log_task_context(audit_buf);
688}
689
690void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
691void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
692 bool task_valid);
693void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
694void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
695void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
696 struct sk_buff *skb);
697void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
698 __be32 net_seq);
699void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
700void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
701 __be32 net_seq);
702void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
703 u8 proto);
704#else
705
706static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
707 bool task_valid)
708{
709}
710
711static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
712 bool task_valid)
713{
714}
715
716static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
717 bool task_valid)
718{
719}
720
721static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
722 bool task_valid)
723{
724}
725
726static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
727 struct sk_buff *skb)
728{
729}
730
731static inline void xfrm_audit_state_replay(struct xfrm_state *x,
732 struct sk_buff *skb, __be32 net_seq)
733{
734}
735
736static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
737 u16 family)
738{
739}
740
741static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
742 __be32 net_spi, __be32 net_seq)
743{
744}
745
746static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
747 struct sk_buff *skb, u8 proto)
748{
749}
750#endif
751
752static inline void xfrm_pol_hold(struct xfrm_policy *policy)
753{
754 if (likely(policy != NULL))
755 refcount_inc(&policy->refcnt);
756}
757
758void xfrm_policy_destroy(struct xfrm_policy *policy);
759
760static inline void xfrm_pol_put(struct xfrm_policy *policy)
761{
762 if (refcount_dec_and_test(&policy->refcnt))
763 xfrm_policy_destroy(policy);
764}
765
766static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
767{
768 int i;
769 for (i = npols - 1; i >= 0; --i)
770 xfrm_pol_put(pols[i]);
771}
772
773void __xfrm_state_destroy(struct xfrm_state *, bool);
774
775static inline void __xfrm_state_put(struct xfrm_state *x)
776{
777 refcount_dec(&x->refcnt);
778}
779
780static inline void xfrm_state_put(struct xfrm_state *x)
781{
782 if (refcount_dec_and_test(&x->refcnt))
783 __xfrm_state_destroy(x, false);
784}
785
786static inline void xfrm_state_put_sync(struct xfrm_state *x)
787{
788 if (refcount_dec_and_test(&x->refcnt))
789 __xfrm_state_destroy(x, true);
790}
791
792static inline void xfrm_state_hold(struct xfrm_state *x)
793{
794 refcount_inc(&x->refcnt);
795}
796
797static inline bool addr_match(const void *token1, const void *token2,
798 unsigned int prefixlen)
799{
800 const __be32 *a1 = token1;
801 const __be32 *a2 = token2;
802 unsigned int pdw;
803 unsigned int pbi;
804
805 pdw = prefixlen >> 5;
806 pbi = prefixlen & 0x1f;
807
808 if (pdw)
809 if (memcmp(a1, a2, pdw << 2))
810 return false;
811
812 if (pbi) {
813 __be32 mask;
814
815 mask = htonl((0xffffffff) << (32 - pbi));
816
817 if ((a1[pdw] ^ a2[pdw]) & mask)
818 return false;
819 }
820
821 return true;
822}
823
824static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
825{
826
827 if (sizeof(long) == 4 && prefixlen == 0)
828 return true;
829 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
830}
831
832static __inline__
833__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
834{
835 __be16 port;
836 switch(fl->flowi_proto) {
837 case IPPROTO_TCP:
838 case IPPROTO_UDP:
839 case IPPROTO_UDPLITE:
840 case IPPROTO_SCTP:
841 port = uli->ports.sport;
842 break;
843 case IPPROTO_ICMP:
844 case IPPROTO_ICMPV6:
845 port = htons(uli->icmpt.type);
846 break;
847 case IPPROTO_MH:
848 port = htons(uli->mht.type);
849 break;
850 case IPPROTO_GRE:
851 port = htons(ntohl(uli->gre_key) >> 16);
852 break;
853 default:
854 port = 0;
855 }
856 return port;
857}
858
859static __inline__
860__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
861{
862 __be16 port;
863 switch(fl->flowi_proto) {
864 case IPPROTO_TCP:
865 case IPPROTO_UDP:
866 case IPPROTO_UDPLITE:
867 case IPPROTO_SCTP:
868 port = uli->ports.dport;
869 break;
870 case IPPROTO_ICMP:
871 case IPPROTO_ICMPV6:
872 port = htons(uli->icmpt.code);
873 break;
874 case IPPROTO_GRE:
875 port = htons(ntohl(uli->gre_key) & 0xffff);
876 break;
877 default:
878 port = 0;
879 }
880 return port;
881}
882
883bool xfrm_selector_match(const struct xfrm_selector *sel,
884 const struct flowi *fl, unsigned short family);
885
886#ifdef CONFIG_SECURITY_NETWORK_XFRM
887
888
889
890static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
891{
892 return ((!s1 && !s2) ||
893 (s1 && s2 &&
894 (s1->ctx_sid == s2->ctx_sid) &&
895 (s1->ctx_doi == s2->ctx_doi) &&
896 (s1->ctx_alg == s2->ctx_alg)));
897}
898#else
899static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
900{
901 return true;
902}
903#endif
904
905
906
907
908
909
910
911
912
913
914
915
916struct xfrm_dst {
917 union {
918 struct dst_entry dst;
919 struct rtable rt;
920 struct rt6_info rt6;
921 } u;
922 struct dst_entry *route;
923 struct dst_entry *child;
924 struct dst_entry *path;
925 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
926 int num_pols, num_xfrms;
927 u32 xfrm_genid;
928 u32 policy_genid;
929 u32 route_mtu_cached;
930 u32 child_mtu_cached;
931 u32 route_cookie;
932 u32 path_cookie;
933};
934
935static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
936{
937#ifdef CONFIG_XFRM
938 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
939 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
940
941 return xdst->path;
942 }
943#endif
944 return (struct dst_entry *) dst;
945}
946
947static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
948{
949#ifdef CONFIG_XFRM
950 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
951 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
952 return xdst->child;
953 }
954#endif
955 return NULL;
956}
957
958#ifdef CONFIG_XFRM
959static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
960{
961 xdst->child = child;
962}
963
964static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
965{
966 xfrm_pols_put(xdst->pols, xdst->num_pols);
967 dst_release(xdst->route);
968 if (likely(xdst->u.dst.xfrm))
969 xfrm_state_put(xdst->u.dst.xfrm);
970}
971#endif
972
973void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
974
975struct xfrm_if_parms {
976 int link;
977 u32 if_id;
978};
979
980struct xfrm_if {
981 struct xfrm_if __rcu *next;
982 struct net_device *dev;
983 struct net *net;
984 struct xfrm_if_parms p;
985
986 struct gro_cells gro_cells;
987};
988
989struct xfrm_offload {
990
991 struct {
992 __u32 low;
993 __u32 hi;
994 } seq;
995
996 __u32 flags;
997#define SA_DELETE_REQ 1
998#define CRYPTO_DONE 2
999#define CRYPTO_NEXT_DONE 4
1000#define CRYPTO_FALLBACK 8
1001#define XFRM_GSO_SEGMENT 16
1002#define XFRM_GRO 32
1003#define XFRM_ESP_NO_TRAILER 64
1004#define XFRM_DEV_RESUME 128
1005#define XFRM_XMIT 256
1006
1007 __u32 status;
1008#define CRYPTO_SUCCESS 1
1009#define CRYPTO_GENERIC_ERROR 2
1010#define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1011#define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1012#define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1013#define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1014#define CRYPTO_INVALID_PACKET_SYNTAX 64
1015#define CRYPTO_INVALID_PROTOCOL 128
1016
1017 __u8 proto;
1018 __u8 inner_ipproto;
1019};
1020
1021struct sec_path {
1022 int len;
1023 int olen;
1024
1025 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1026 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1027};
1028
1029struct sec_path *secpath_set(struct sk_buff *skb);
1030
1031static inline void
1032secpath_reset(struct sk_buff *skb)
1033{
1034#ifdef CONFIG_XFRM
1035 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1036#endif
1037}
1038
1039static inline int
1040xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1041{
1042 switch (family) {
1043 case AF_INET:
1044 return addr->a4 == 0;
1045 case AF_INET6:
1046 return ipv6_addr_any(&addr->in6);
1047 }
1048 return 0;
1049}
1050
1051static inline int
1052__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1053{
1054 return (tmpl->saddr.a4 &&
1055 tmpl->saddr.a4 != x->props.saddr.a4);
1056}
1057
1058static inline int
1059__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1060{
1061 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1062 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1063}
1064
1065static inline int
1066xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1067{
1068 switch (family) {
1069 case AF_INET:
1070 return __xfrm4_state_addr_cmp(tmpl, x);
1071 case AF_INET6:
1072 return __xfrm6_state_addr_cmp(tmpl, x);
1073 }
1074 return !0;
1075}
1076
1077#ifdef CONFIG_XFRM
1078static inline bool
1079xfrm_default_allow(struct net *net, int dir)
1080{
1081 u8 def = net->xfrm.policy_default;
1082
1083 switch (dir) {
1084 case XFRM_POLICY_IN:
1085 return def & XFRM_POL_DEFAULT_IN ? false : true;
1086 case XFRM_POLICY_OUT:
1087 return def & XFRM_POL_DEFAULT_OUT ? false : true;
1088 case XFRM_POLICY_FWD:
1089 return def & XFRM_POL_DEFAULT_FWD ? false : true;
1090 }
1091 return false;
1092}
1093
1094int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1095 unsigned short family);
1096
1097static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1098 struct sk_buff *skb,
1099 unsigned int family, int reverse)
1100{
1101 struct net *net = dev_net(skb->dev);
1102 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1103
1104 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1105 return __xfrm_policy_check(sk, ndir, skb, family);
1106
1107 if (xfrm_default_allow(net, dir))
1108 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1109 (skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY)) ||
1110 __xfrm_policy_check(sk, ndir, skb, family);
1111 else
1112 return (skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY)) ||
1113 __xfrm_policy_check(sk, ndir, skb, family);
1114}
1115
1116static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1117{
1118 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1119}
1120
1121static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1122{
1123 return xfrm_policy_check(sk, dir, skb, AF_INET);
1124}
1125
1126static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1127{
1128 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1129}
1130
1131static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1132 struct sk_buff *skb)
1133{
1134 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1135}
1136
1137static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1138 struct sk_buff *skb)
1139{
1140 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1141}
1142
1143int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1144 unsigned int family, int reverse);
1145
1146static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1147 unsigned int family)
1148{
1149 return __xfrm_decode_session(skb, fl, family, 0);
1150}
1151
1152static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1153 struct flowi *fl,
1154 unsigned int family)
1155{
1156 return __xfrm_decode_session(skb, fl, family, 1);
1157}
1158
1159int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1160
1161static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1162{
1163 struct net *net = dev_net(skb->dev);
1164
1165 if (xfrm_default_allow(net, XFRM_POLICY_FWD))
1166 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1167 (skb_dst(skb)->flags & DST_NOXFRM) ||
1168 __xfrm_route_forward(skb, family);
1169 else
1170 return (skb_dst(skb)->flags & DST_NOXFRM) ||
1171 __xfrm_route_forward(skb, family);
1172}
1173
1174static inline int xfrm4_route_forward(struct sk_buff *skb)
1175{
1176 return xfrm_route_forward(skb, AF_INET);
1177}
1178
1179static inline int xfrm6_route_forward(struct sk_buff *skb)
1180{
1181 return xfrm_route_forward(skb, AF_INET6);
1182}
1183
1184int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1185
1186static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1187{
1188 sk->sk_policy[0] = NULL;
1189 sk->sk_policy[1] = NULL;
1190 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1191 return __xfrm_sk_clone_policy(sk, osk);
1192 return 0;
1193}
1194
1195int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1196
1197static inline void xfrm_sk_free_policy(struct sock *sk)
1198{
1199 struct xfrm_policy *pol;
1200
1201 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1202 if (unlikely(pol != NULL)) {
1203 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1204 sk->sk_policy[0] = NULL;
1205 }
1206 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1207 if (unlikely(pol != NULL)) {
1208 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1209 sk->sk_policy[1] = NULL;
1210 }
1211}
1212
1213#else
1214
1215static inline void xfrm_sk_free_policy(struct sock *sk) {}
1216static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1217static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1218static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1219static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1220{
1221 return 1;
1222}
1223static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1224{
1225 return 1;
1226}
1227static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1228{
1229 return 1;
1230}
1231static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1232 struct flowi *fl,
1233 unsigned int family)
1234{
1235 return -ENOSYS;
1236}
1237static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1238 struct sk_buff *skb)
1239{
1240 return 1;
1241}
1242static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1243 struct sk_buff *skb)
1244{
1245 return 1;
1246}
1247#endif
1248
1249static __inline__
1250xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1251{
1252 switch (family){
1253 case AF_INET:
1254 return (xfrm_address_t *)&fl->u.ip4.daddr;
1255 case AF_INET6:
1256 return (xfrm_address_t *)&fl->u.ip6.daddr;
1257 }
1258 return NULL;
1259}
1260
1261static __inline__
1262xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1263{
1264 switch (family){
1265 case AF_INET:
1266 return (xfrm_address_t *)&fl->u.ip4.saddr;
1267 case AF_INET6:
1268 return (xfrm_address_t *)&fl->u.ip6.saddr;
1269 }
1270 return NULL;
1271}
1272
1273static __inline__
1274void xfrm_flowi_addr_get(const struct flowi *fl,
1275 xfrm_address_t *saddr, xfrm_address_t *daddr,
1276 unsigned short family)
1277{
1278 switch(family) {
1279 case AF_INET:
1280 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1281 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1282 break;
1283 case AF_INET6:
1284 saddr->in6 = fl->u.ip6.saddr;
1285 daddr->in6 = fl->u.ip6.daddr;
1286 break;
1287 }
1288}
1289
1290static __inline__ int
1291__xfrm4_state_addr_check(const struct xfrm_state *x,
1292 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1293{
1294 if (daddr->a4 == x->id.daddr.a4 &&
1295 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1296 return 1;
1297 return 0;
1298}
1299
1300static __inline__ int
1301__xfrm6_state_addr_check(const struct xfrm_state *x,
1302 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1303{
1304 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1305 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1306 ipv6_addr_any((struct in6_addr *)saddr) ||
1307 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1308 return 1;
1309 return 0;
1310}
1311
1312static __inline__ int
1313xfrm_state_addr_check(const struct xfrm_state *x,
1314 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1315 unsigned short family)
1316{
1317 switch (family) {
1318 case AF_INET:
1319 return __xfrm4_state_addr_check(x, daddr, saddr);
1320 case AF_INET6:
1321 return __xfrm6_state_addr_check(x, daddr, saddr);
1322 }
1323 return 0;
1324}
1325
1326static __inline__ int
1327xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1328 unsigned short family)
1329{
1330 switch (family) {
1331 case AF_INET:
1332 return __xfrm4_state_addr_check(x,
1333 (const xfrm_address_t *)&fl->u.ip4.daddr,
1334 (const xfrm_address_t *)&fl->u.ip4.saddr);
1335 case AF_INET6:
1336 return __xfrm6_state_addr_check(x,
1337 (const xfrm_address_t *)&fl->u.ip6.daddr,
1338 (const xfrm_address_t *)&fl->u.ip6.saddr);
1339 }
1340 return 0;
1341}
1342
1343static inline int xfrm_state_kern(const struct xfrm_state *x)
1344{
1345 return atomic_read(&x->tunnel_users);
1346}
1347
1348static inline bool xfrm_id_proto_valid(u8 proto)
1349{
1350 switch (proto) {
1351 case IPPROTO_AH:
1352 case IPPROTO_ESP:
1353 case IPPROTO_COMP:
1354#if IS_ENABLED(CONFIG_IPV6)
1355 case IPPROTO_ROUTING:
1356 case IPPROTO_DSTOPTS:
1357#endif
1358 return true;
1359 default:
1360 return false;
1361 }
1362}
1363
1364
1365static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1366{
1367 return (!userproto || proto == userproto ||
1368 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1369 proto == IPPROTO_ESP ||
1370 proto == IPPROTO_COMP)));
1371}
1372
1373
1374
1375
1376struct xfrm_algo_aead_info {
1377 char *geniv;
1378 u16 icv_truncbits;
1379};
1380
1381struct xfrm_algo_auth_info {
1382 u16 icv_truncbits;
1383 u16 icv_fullbits;
1384};
1385
1386struct xfrm_algo_encr_info {
1387 char *geniv;
1388 u16 blockbits;
1389 u16 defkeybits;
1390};
1391
1392struct xfrm_algo_comp_info {
1393 u16 threshold;
1394};
1395
1396struct xfrm_algo_desc {
1397 char *name;
1398 char *compat;
1399 u8 available:1;
1400 u8 pfkey_supported:1;
1401 union {
1402 struct xfrm_algo_aead_info aead;
1403 struct xfrm_algo_auth_info auth;
1404 struct xfrm_algo_encr_info encr;
1405 struct xfrm_algo_comp_info comp;
1406 } uinfo;
1407 struct sadb_alg desc;
1408};
1409
1410
1411struct xfrm4_protocol {
1412 int (*handler)(struct sk_buff *skb);
1413 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1414 int encap_type);
1415 int (*cb_handler)(struct sk_buff *skb, int err);
1416 int (*err_handler)(struct sk_buff *skb, u32 info);
1417
1418 struct xfrm4_protocol __rcu *next;
1419 int priority;
1420};
1421
1422struct xfrm6_protocol {
1423 int (*handler)(struct sk_buff *skb);
1424 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1425 int encap_type);
1426 int (*cb_handler)(struct sk_buff *skb, int err);
1427 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1428 u8 type, u8 code, int offset, __be32 info);
1429
1430 struct xfrm6_protocol __rcu *next;
1431 int priority;
1432};
1433
1434
1435struct xfrm_tunnel {
1436 int (*handler)(struct sk_buff *skb);
1437 int (*cb_handler)(struct sk_buff *skb, int err);
1438 int (*err_handler)(struct sk_buff *skb, u32 info);
1439
1440 struct xfrm_tunnel __rcu *next;
1441 int priority;
1442};
1443
1444struct xfrm6_tunnel {
1445 int (*handler)(struct sk_buff *skb);
1446 int (*cb_handler)(struct sk_buff *skb, int err);
1447 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1448 u8 type, u8 code, int offset, __be32 info);
1449 struct xfrm6_tunnel __rcu *next;
1450 int priority;
1451};
1452
1453void xfrm_init(void);
1454void xfrm4_init(void);
1455int xfrm_state_init(struct net *net);
1456void xfrm_state_fini(struct net *net);
1457void xfrm4_state_init(void);
1458void xfrm4_protocol_init(void);
1459#ifdef CONFIG_XFRM
1460int xfrm6_init(void);
1461void xfrm6_fini(void);
1462int xfrm6_state_init(void);
1463void xfrm6_state_fini(void);
1464int xfrm6_protocol_init(void);
1465void xfrm6_protocol_fini(void);
1466#else
1467static inline int xfrm6_init(void)
1468{
1469 return 0;
1470}
1471static inline void xfrm6_fini(void)
1472{
1473 ;
1474}
1475#endif
1476
1477#ifdef CONFIG_XFRM_STATISTICS
1478int xfrm_proc_init(struct net *net);
1479void xfrm_proc_fini(struct net *net);
1480#endif
1481
1482int xfrm_sysctl_init(struct net *net);
1483#ifdef CONFIG_SYSCTL
1484void xfrm_sysctl_fini(struct net *net);
1485#else
1486static inline void xfrm_sysctl_fini(struct net *net)
1487{
1488}
1489#endif
1490
1491void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1492 struct xfrm_address_filter *filter);
1493int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1494 int (*func)(struct xfrm_state *, int, void*), void *);
1495void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1496struct xfrm_state *xfrm_state_alloc(struct net *net);
1497void xfrm_state_free(struct xfrm_state *x);
1498struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1499 const xfrm_address_t *saddr,
1500 const struct flowi *fl,
1501 struct xfrm_tmpl *tmpl,
1502 struct xfrm_policy *pol, int *err,
1503 unsigned short family, u32 if_id);
1504struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1505 xfrm_address_t *daddr,
1506 xfrm_address_t *saddr,
1507 unsigned short family,
1508 u8 mode, u8 proto, u32 reqid);
1509struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1510 unsigned short family);
1511int xfrm_state_check_expire(struct xfrm_state *x);
1512void xfrm_state_insert(struct xfrm_state *x);
1513int xfrm_state_add(struct xfrm_state *x);
1514int xfrm_state_update(struct xfrm_state *x);
1515struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1516 const xfrm_address_t *daddr, __be32 spi,
1517 u8 proto, unsigned short family);
1518struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1519 const xfrm_address_t *daddr,
1520 const xfrm_address_t *saddr,
1521 u8 proto,
1522 unsigned short family);
1523#ifdef CONFIG_XFRM_SUB_POLICY
1524void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1525 unsigned short family);
1526void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1527 unsigned short family);
1528#else
1529static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1530 int n, unsigned short family)
1531{
1532}
1533
1534static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1535 int n, unsigned short family)
1536{
1537}
1538#endif
1539
1540struct xfrmk_sadinfo {
1541 u32 sadhcnt;
1542 u32 sadhmcnt;
1543 u32 sadcnt;
1544};
1545
1546struct xfrmk_spdinfo {
1547 u32 incnt;
1548 u32 outcnt;
1549 u32 fwdcnt;
1550 u32 inscnt;
1551 u32 outscnt;
1552 u32 fwdscnt;
1553 u32 spdhcnt;
1554 u32 spdhmcnt;
1555};
1556
1557struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1558int xfrm_state_delete(struct xfrm_state *x);
1559int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1560int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1561void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1562void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1563u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1564int xfrm_init_replay(struct xfrm_state *x);
1565u32 __xfrm_state_mtu(struct xfrm_state *x, int mtu);
1566u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1567int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1568int xfrm_init_state(struct xfrm_state *x);
1569int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1570int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1571int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
1572 int (*finish)(struct net *, struct sock *,
1573 struct sk_buff *));
1574int xfrm_trans_queue(struct sk_buff *skb,
1575 int (*finish)(struct net *, struct sock *,
1576 struct sk_buff *));
1577int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err);
1578int xfrm_output(struct sock *sk, struct sk_buff *skb);
1579
1580#if IS_ENABLED(CONFIG_NET_PKTGEN)
1581int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1582#endif
1583
1584void xfrm_local_error(struct sk_buff *skb, int mtu);
1585int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1586int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1587 int encap_type);
1588int xfrm4_transport_finish(struct sk_buff *skb, int async);
1589int xfrm4_rcv(struct sk_buff *skb);
1590
1591static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1592{
1593 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1594 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1595 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1596 return xfrm_input(skb, nexthdr, spi, 0);
1597}
1598
1599int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1600int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1601int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1602int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1603int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1604void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1605int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1606int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1607 struct ip6_tnl *t);
1608int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1609 int encap_type);
1610int xfrm6_transport_finish(struct sk_buff *skb, int async);
1611int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1612int xfrm6_rcv(struct sk_buff *skb);
1613int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1614 xfrm_address_t *saddr, u8 proto);
1615void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1616int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1617int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1618int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1619int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1620__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1621__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1622int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1623
1624#ifdef CONFIG_XFRM
1625void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu);
1626int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1627int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1628int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval,
1629 int optlen);
1630#else
1631static inline int xfrm_user_policy(struct sock *sk, int optname,
1632 sockptr_t optval, int optlen)
1633{
1634 return -ENOPROTOOPT;
1635}
1636#endif
1637
1638struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1639 const xfrm_address_t *saddr,
1640 const xfrm_address_t *daddr,
1641 int family, u32 mark);
1642
1643struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1644
1645void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1646int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1647 int (*func)(struct xfrm_policy *, int, int, void*),
1648 void *);
1649void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1650int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1651struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net,
1652 const struct xfrm_mark *mark,
1653 u32 if_id, u8 type, int dir,
1654 struct xfrm_selector *sel,
1655 struct xfrm_sec_ctx *ctx, int delete,
1656 int *err);
1657struct xfrm_policy *xfrm_policy_byid(struct net *net,
1658 const struct xfrm_mark *mark, u32 if_id,
1659 u8 type, int dir, u32 id, int delete,
1660 int *err);
1661int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1662void xfrm_policy_hash_rebuild(struct net *net);
1663u32 xfrm_get_acqseq(void);
1664int verify_spi_info(u8 proto, u32 min, u32 max);
1665int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1666struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1667 u8 mode, u32 reqid, u32 if_id, u8 proto,
1668 const xfrm_address_t *daddr,
1669 const xfrm_address_t *saddr, int create,
1670 unsigned short family);
1671int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1672
1673#ifdef CONFIG_XFRM_MIGRATE
1674int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1675 const struct xfrm_migrate *m, int num_bundles,
1676 const struct xfrm_kmaddress *k,
1677 const struct xfrm_encap_tmpl *encap);
1678struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1679struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1680 struct xfrm_migrate *m,
1681 struct xfrm_encap_tmpl *encap);
1682int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1683 struct xfrm_migrate *m, int num_bundles,
1684 struct xfrm_kmaddress *k, struct net *net,
1685 struct xfrm_encap_tmpl *encap);
1686#endif
1687
1688int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1689void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1690int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1691 xfrm_address_t *addr);
1692
1693void xfrm_input_init(void);
1694int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1695
1696void xfrm_probe_algs(void);
1697int xfrm_count_pfkey_auth_supported(void);
1698int xfrm_count_pfkey_enc_supported(void);
1699struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1700struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1701struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1702struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1703struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1704struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1705struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1706struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1707struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1708 int probe);
1709
1710static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1711 const xfrm_address_t *b)
1712{
1713 return ipv6_addr_equal((const struct in6_addr *)a,
1714 (const struct in6_addr *)b);
1715}
1716
1717static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1718 const xfrm_address_t *b,
1719 sa_family_t family)
1720{
1721 switch (family) {
1722 default:
1723 case AF_INET:
1724 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1725 case AF_INET6:
1726 return xfrm6_addr_equal(a, b);
1727 }
1728}
1729
1730static inline int xfrm_policy_id2dir(u32 index)
1731{
1732 return index & 7;
1733}
1734
1735#ifdef CONFIG_XFRM
1736void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq);
1737int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq);
1738void xfrm_replay_notify(struct xfrm_state *x, int event);
1739int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb);
1740int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq);
1741
1742static inline int xfrm_aevent_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_AEVENTS);
1751 rcu_read_unlock();
1752 return ret;
1753}
1754
1755static inline int xfrm_acquire_is_on(struct net *net)
1756{
1757 struct sock *nlsk;
1758 int ret = 0;
1759
1760 rcu_read_lock();
1761 nlsk = rcu_dereference(net->xfrm.nlsk);
1762 if (nlsk)
1763 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1764 rcu_read_unlock();
1765
1766 return ret;
1767}
1768#endif
1769
1770static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1771{
1772 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1773}
1774
1775static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1776{
1777 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1778}
1779
1780static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1781{
1782 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1783}
1784
1785static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1786{
1787 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1788}
1789
1790#ifdef CONFIG_XFRM_MIGRATE
1791static inline int xfrm_replay_clone(struct xfrm_state *x,
1792 struct xfrm_state *orig)
1793{
1794
1795 x->replay_esn = kmemdup(orig->replay_esn,
1796 xfrm_replay_state_esn_len(orig->replay_esn),
1797 GFP_KERNEL);
1798 if (!x->replay_esn)
1799 return -ENOMEM;
1800 x->preplay_esn = kmemdup(orig->preplay_esn,
1801 xfrm_replay_state_esn_len(orig->preplay_esn),
1802 GFP_KERNEL);
1803 if (!x->preplay_esn)
1804 return -ENOMEM;
1805
1806 return 0;
1807}
1808
1809static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1810{
1811 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1812}
1813
1814
1815static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1816{
1817 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1818}
1819
1820static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1821{
1822 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1823}
1824
1825static inline void xfrm_states_put(struct xfrm_state **states, int n)
1826{
1827 int i;
1828 for (i = 0; i < n; i++)
1829 xfrm_state_put(*(states + i));
1830}
1831
1832static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1833{
1834 int i;
1835 for (i = 0; i < n; i++)
1836 xfrm_state_delete(*(states + i));
1837}
1838#endif
1839
1840#ifdef CONFIG_XFRM
1841static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1842{
1843 struct sec_path *sp = skb_sec_path(skb);
1844
1845 return sp->xvec[sp->len - 1];
1846}
1847#endif
1848
1849static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1850{
1851#ifdef CONFIG_XFRM
1852 struct sec_path *sp = skb_sec_path(skb);
1853
1854 if (!sp || !sp->olen || sp->len != sp->olen)
1855 return NULL;
1856
1857 return &sp->ovec[sp->olen - 1];
1858#else
1859 return NULL;
1860#endif
1861}
1862
1863void __init xfrm_dev_init(void);
1864
1865#ifdef CONFIG_XFRM_OFFLOAD
1866void xfrm_dev_resume(struct sk_buff *skb);
1867void xfrm_dev_backlog(struct softnet_data *sd);
1868struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1869int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1870 struct xfrm_user_offload *xuo);
1871bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1872
1873static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1874{
1875 struct xfrm_state_offload *xso = &x->xso;
1876
1877 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1878 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1879}
1880
1881static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1882{
1883 struct xfrm_state *x = dst->xfrm;
1884 struct xfrm_dst *xdst;
1885
1886 if (!x || !x->type_offload)
1887 return false;
1888
1889 xdst = (struct xfrm_dst *) dst;
1890 if (!x->xso.offload_handle && !xdst->child->xfrm)
1891 return true;
1892 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1893 !xdst->child->xfrm)
1894 return true;
1895
1896 return false;
1897}
1898
1899static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1900{
1901 struct xfrm_state_offload *xso = &x->xso;
1902
1903 if (xso->dev)
1904 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1905}
1906
1907static inline void xfrm_dev_state_free(struct xfrm_state *x)
1908{
1909 struct xfrm_state_offload *xso = &x->xso;
1910 struct net_device *dev = xso->dev;
1911
1912 if (dev && dev->xfrmdev_ops) {
1913 if (dev->xfrmdev_ops->xdo_dev_state_free)
1914 dev->xfrmdev_ops->xdo_dev_state_free(x);
1915 xso->dev = NULL;
1916 dev_put(dev);
1917 }
1918}
1919#else
1920static inline void xfrm_dev_resume(struct sk_buff *skb)
1921{
1922}
1923
1924static inline void xfrm_dev_backlog(struct softnet_data *sd)
1925{
1926}
1927
1928static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1929{
1930 return skb;
1931}
1932
1933static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1934{
1935 return 0;
1936}
1937
1938static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1939{
1940}
1941
1942static inline void xfrm_dev_state_free(struct xfrm_state *x)
1943{
1944}
1945
1946static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1947{
1948 return false;
1949}
1950
1951static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1952{
1953}
1954
1955static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1956{
1957 return false;
1958}
1959#endif
1960
1961static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1962{
1963 if (attrs[XFRMA_MARK])
1964 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1965 else
1966 m->v = m->m = 0;
1967
1968 return m->v & m->m;
1969}
1970
1971static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1972{
1973 int ret = 0;
1974
1975 if (m->m | m->v)
1976 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1977 return ret;
1978}
1979
1980static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1981{
1982 struct xfrm_mark *m = &x->props.smark;
1983
1984 return (m->v & m->m) | (mark & ~m->m);
1985}
1986
1987static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1988{
1989 int ret = 0;
1990
1991 if (if_id)
1992 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1993 return ret;
1994}
1995
1996static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1997 unsigned int family)
1998{
1999 bool tunnel = false;
2000
2001 switch(family) {
2002 case AF_INET:
2003 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2004 tunnel = true;
2005 break;
2006 case AF_INET6:
2007 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2008 tunnel = true;
2009 break;
2010 }
2011 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
2012 return -EINVAL;
2013
2014 return 0;
2015}
2016
2017extern const int xfrm_msg_min[XFRM_NR_MSGTYPES];
2018extern const struct nla_policy xfrma_policy[XFRMA_MAX+1];
2019
2020struct xfrm_translator {
2021
2022 int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src);
2023
2024
2025 struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh,
2026 int maxtype, const struct nla_policy *policy,
2027 struct netlink_ext_ack *extack);
2028
2029
2030 int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen);
2031
2032 struct module *owner;
2033};
2034
2035#if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
2036extern int xfrm_register_translator(struct xfrm_translator *xtr);
2037extern int xfrm_unregister_translator(struct xfrm_translator *xtr);
2038extern struct xfrm_translator *xfrm_get_translator(void);
2039extern void xfrm_put_translator(struct xfrm_translator *xtr);
2040#else
2041static inline struct xfrm_translator *xfrm_get_translator(void)
2042{
2043 return NULL;
2044}
2045static inline void xfrm_put_translator(struct xfrm_translator *xtr)
2046{
2047}
2048#endif
2049
2050#if IS_ENABLED(CONFIG_IPV6)
2051static inline bool xfrm6_local_dontfrag(const struct sock *sk)
2052{
2053 int proto;
2054
2055 if (!sk || sk->sk_family != AF_INET6)
2056 return false;
2057
2058 proto = sk->sk_protocol;
2059 if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
2060 return inet6_sk(sk)->dontfrag;
2061
2062 return false;
2063}
2064#endif
2065#endif
2066