1 /* SPDX-License-Identifier: GPL-2.0 */
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/inet_dscp.h>
23 #include <net/ip.h>
24 #include <net/route.h>
25 #include <net/ipv6.h>
26 #include <net/ip6_fib.h>
27 #include <net/flow.h>
28 #include <net/gro_cells.h>
29
30 #include <linux/interrupt.h>
31
32 #ifdef CONFIG_XFRM_STATISTICS
33 #include <net/snmp.h>
34 #endif
35
36 #define XFRM_PROTO_ESP 50
37 #define XFRM_PROTO_AH 51
38 #define XFRM_PROTO_COMP 108
39 #define XFRM_PROTO_IPIP 4
40 #define XFRM_PROTO_IPV6 41
41 #define XFRM_PROTO_IPTFS IPPROTO_AGGFRAG
42 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
43 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
44
45 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
46 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
47 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
48 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
49 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
50 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
51 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
52 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
53
54 #ifdef CONFIG_XFRM_STATISTICS
55 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
56 #define XFRM_ADD_STATS(net, field, val) SNMP_ADD_STATS((net)->mib.xfrm_statistics, field, val)
57 #else
58 #define XFRM_INC_STATS(net, field) ((void)(net))
59 #define XFRM_ADD_STATS(net, field, val) ((void)(net))
60 #endif
61
62
63 /* Organization of SPD aka "XFRM rules"
64 ------------------------------------
65
66 Basic objects:
67 - policy rule, struct xfrm_policy (=SPD entry)
68 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
69 - instance of a transformer, struct xfrm_state (=SA)
70 - template to clone xfrm_state, struct xfrm_tmpl
71
72 SPD is organized as hash table (for policies that meet minimum address prefix
73 length setting, net->xfrm.policy_hthresh). Other policies are stored in
74 lists, sorted into rbtree ordered by destination and source address networks.
75 See net/xfrm/xfrm_policy.c for details.
76
77 (To be compatible with existing pfkeyv2 implementations,
78 many rules with priority of 0x7fffffff are allowed to exist and
79 such rules are ordered in an unpredictable way, thanks to bsd folks.)
80
81 If "action" is "block", then we prohibit the flow, otherwise:
82 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
83 policy entry has list of up to XFRM_MAX_DEPTH transformations,
84 described by templates xfrm_tmpl. Each template is resolved
85 to a complete xfrm_state (see below) and we pack bundle of transformations
86 to a dst_entry returned to requester.
87
88 dst -. xfrm .-> xfrm_state #1
89 |---. child .-> dst -. xfrm .-> xfrm_state #2
90 |---. child .-> dst -. xfrm .-> xfrm_state #3
91 |---. child .-> NULL
92
93
94 Resolution of xrfm_tmpl
95 -----------------------
96 Template contains:
97 1. ->mode Mode: transport or tunnel
98 2. ->id.proto Protocol: AH/ESP/IPCOMP
99 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
100 Q: allow to resolve security gateway?
101 4. ->id.spi If not zero, static SPI.
102 5. ->saddr Local tunnel endpoint, ignored for transport mode.
103 6. ->algos List of allowed algos. Plain bitmask now.
104 Q: ealgos, aalgos, calgos. What a mess...
105 7. ->share Sharing mode.
106 Q: how to implement private sharing mode? To add struct sock* to
107 flow id?
108
109 Having this template we search through SAD searching for entries
110 with appropriate mode/proto/algo, permitted by selector.
111 If no appropriate entry found, it is requested from key manager.
112
113 PROBLEMS:
114 Q: How to find all the bundles referring to a physical path for
115 PMTU discovery? Seems, dst should contain list of all parents...
116 and enter to infinite locking hierarchy disaster.
117 No! It is easier, we will not search for them, let them find us.
118 We add genid to each dst plus pointer to genid of raw IP route,
119 pmtu disc will update pmtu on raw IP route and increase its genid.
120 dst_check() will see this for top level and trigger resyncing
121 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
122 */
123
124 struct xfrm_state_walk {
125 struct list_head all;
126 u8 state;
127 u8 dying;
128 u8 proto;
129 u32 seq;
130 struct xfrm_address_filter *filter;
131 };
132
133 enum {
134 XFRM_DEV_OFFLOAD_IN = 1,
135 XFRM_DEV_OFFLOAD_OUT,
136 XFRM_DEV_OFFLOAD_FWD,
137 };
138
139 enum {
140 XFRM_DEV_OFFLOAD_UNSPECIFIED,
141 XFRM_DEV_OFFLOAD_CRYPTO,
142 XFRM_DEV_OFFLOAD_PACKET,
143 };
144
145 enum {
146 XFRM_DEV_OFFLOAD_FLAG_ACQ = 1,
147 };
148
149 struct xfrm_dev_offload {
150 struct net_device *dev;
151 netdevice_tracker dev_tracker;
152 struct net_device *real_dev;
153 unsigned long offload_handle;
154 u8 dir : 2;
155 u8 type : 2;
156 u8 flags : 2;
157 };
158
159 struct xfrm_mode {
160 u8 encap;
161 u8 family;
162 u8 flags;
163 };
164
165 /* Flags for xfrm_mode. */
166 enum {
167 XFRM_MODE_FLAG_TUNNEL = 1,
168 };
169
170 enum xfrm_replay_mode {
171 XFRM_REPLAY_MODE_LEGACY,
172 XFRM_REPLAY_MODE_BMP,
173 XFRM_REPLAY_MODE_ESN,
174 };
175
176 /* Full description of state of transformer. */
177 struct xfrm_state {
178 possible_net_t xs_net;
179 union {
180 struct hlist_node gclist;
181 struct hlist_node bydst;
182 };
183 union {
184 struct hlist_node dev_gclist;
185 struct hlist_node bysrc;
186 };
187 struct hlist_node byspi;
188 struct hlist_node byseq;
189 struct hlist_node state_cache;
190 struct hlist_node state_cache_input;
191
192 refcount_t refcnt;
193 spinlock_t lock;
194
195 u32 pcpu_num;
196 struct xfrm_id id;
197 struct xfrm_selector sel;
198 struct xfrm_mark mark;
199 u32 if_id;
200 u32 tfcpad;
201
202 u32 genid;
203
204 /* Key manager bits */
205 struct xfrm_state_walk km;
206
207 /* Parameters of this state. */
208 struct {
209 u32 reqid;
210 u8 mode;
211 u8 replay_window;
212 u8 aalgo, ealgo, calgo;
213 u8 flags;
214 u16 family;
215 xfrm_address_t saddr;
216 int header_len;
217 int enc_hdr_len;
218 int trailer_len;
219 u32 extra_flags;
220 struct xfrm_mark smark;
221 } props;
222
223 struct xfrm_lifetime_cfg lft;
224
225 /* Data for transformer */
226 struct xfrm_algo_auth *aalg;
227 struct xfrm_algo *ealg;
228 struct xfrm_algo *calg;
229 struct xfrm_algo_aead *aead;
230 const char *geniv;
231
232 /* mapping change rate limiting */
233 __be16 new_mapping_sport;
234 u32 new_mapping; /* seconds */
235 u32 mapping_maxage; /* seconds for input SA */
236
237 /* Data for encapsulator */
238 struct xfrm_encap_tmpl *encap;
239
240 /* NAT keepalive */
241 u32 nat_keepalive_interval; /* seconds */
242 time64_t nat_keepalive_expiration;
243
244 /* Data for care-of address */
245 xfrm_address_t *coaddr;
246
247 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
248 struct xfrm_state *tunnel;
249
250 /* If a tunnel, number of users + 1 */
251 atomic_t tunnel_users;
252
253 /* State for replay detection */
254 struct xfrm_replay_state replay;
255 struct xfrm_replay_state_esn *replay_esn;
256
257 /* Replay detection state at the time we sent the last notification */
258 struct xfrm_replay_state preplay;
259 struct xfrm_replay_state_esn *preplay_esn;
260
261 /* replay detection mode */
262 enum xfrm_replay_mode repl_mode;
263 /* internal flag that only holds state for delayed aevent at the
264 * moment
265 */
266 u32 xflags;
267
268 /* Replay detection notification settings */
269 u32 replay_maxage;
270 u32 replay_maxdiff;
271
272 /* Replay detection notification timer */
273 struct timer_list rtimer;
274
275 /* Statistics */
276 struct xfrm_stats stats;
277
278 struct xfrm_lifetime_cur curlft;
279 struct hrtimer mtimer;
280
281 struct xfrm_dev_offload xso;
282
283 /* used to fix curlft->add_time when changing date */
284 long saved_tmo;
285
286 /* Last used time */
287 time64_t lastused;
288
289 struct page_frag xfrag;
290
291 /* Reference to data common to all the instances of this
292 * transformer. */
293 const struct xfrm_type *type;
294 struct xfrm_mode inner_mode;
295 struct xfrm_mode inner_mode_iaf;
296 struct xfrm_mode outer_mode;
297
298 const struct xfrm_type_offload *type_offload;
299
300 /* Security context */
301 struct xfrm_sec_ctx *security;
302
303 /* Private data of this transformer, format is opaque,
304 * interpreted by xfrm_type methods. */
305 void *data;
306 u8 dir;
307
308 const struct xfrm_mode_cbs *mode_cbs;
309 void *mode_data;
310 };
311
xs_net(struct xfrm_state * x)312 static inline struct net *xs_net(struct xfrm_state *x)
313 {
314 return read_pnet(&x->xs_net);
315 }
316
317 /* xflags - make enum if more show up */
318 #define XFRM_TIME_DEFER 1
319 #define XFRM_SOFT_EXPIRE 2
320
321 enum {
322 XFRM_STATE_VOID,
323 XFRM_STATE_ACQ,
324 XFRM_STATE_VALID,
325 XFRM_STATE_ERROR,
326 XFRM_STATE_EXPIRED,
327 XFRM_STATE_DEAD
328 };
329
330 /* callback structure passed from either netlink or pfkey */
331 struct km_event {
332 union {
333 u32 hard;
334 u32 proto;
335 u32 byid;
336 u32 aevent;
337 u32 type;
338 } data;
339
340 u32 seq;
341 u32 portid;
342 u32 event;
343 struct net *net;
344 };
345
346 struct xfrm_if_decode_session_result {
347 struct net *net;
348 u32 if_id;
349 };
350
351 struct xfrm_if_cb {
352 bool (*decode_session)(struct sk_buff *skb,
353 unsigned short family,
354 struct xfrm_if_decode_session_result *res);
355 };
356
357 void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
358 void xfrm_if_unregister_cb(void);
359
360 struct xfrm_dst_lookup_params {
361 struct net *net;
362 dscp_t dscp;
363 int oif;
364 xfrm_address_t *saddr;
365 xfrm_address_t *daddr;
366 u32 mark;
367 __u8 ipproto;
368 union flowi_uli uli;
369 };
370
371 struct net_device;
372 struct xfrm_type;
373 struct xfrm_dst;
374 struct xfrm_policy_afinfo {
375 struct dst_ops *dst_ops;
376 struct dst_entry *(*dst_lookup)(const struct xfrm_dst_lookup_params *params);
377 int (*get_saddr)(xfrm_address_t *saddr,
378 const struct xfrm_dst_lookup_params *params);
379 int (*fill_dst)(struct xfrm_dst *xdst,
380 struct net_device *dev,
381 const struct flowi *fl);
382 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
383 };
384
385 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
386 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
387 void km_policy_notify(struct xfrm_policy *xp, int dir,
388 const struct km_event *c);
389 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
390
391 struct xfrm_tmpl;
392 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
393 struct xfrm_policy *pol);
394 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
395 int __xfrm_state_delete(struct xfrm_state *x);
396
397 struct xfrm_state_afinfo {
398 u8 family;
399 u8 proto;
400
401 const struct xfrm_type_offload *type_offload_esp;
402
403 const struct xfrm_type *type_esp;
404 const struct xfrm_type *type_ipip;
405 const struct xfrm_type *type_ipip6;
406 const struct xfrm_type *type_comp;
407 const struct xfrm_type *type_ah;
408 const struct xfrm_type *type_routing;
409 const struct xfrm_type *type_dstopts;
410
411 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
412 int (*transport_finish)(struct sk_buff *skb,
413 int async);
414 void (*local_error)(struct sk_buff *skb, u32 mtu);
415 };
416
417 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
418 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
419 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
420 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
421
422 struct xfrm_input_afinfo {
423 u8 family;
424 bool is_ipip;
425 int (*callback)(struct sk_buff *skb, u8 protocol,
426 int err);
427 };
428
429 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
430 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
431
432 void xfrm_flush_gc(void);
433 void xfrm_state_delete_tunnel(struct xfrm_state *x);
434
435 struct xfrm_type {
436 struct module *owner;
437 u8 proto;
438 u8 flags;
439 #define XFRM_TYPE_NON_FRAGMENT 1
440 #define XFRM_TYPE_REPLAY_PROT 2
441 #define XFRM_TYPE_LOCAL_COADDR 4
442 #define XFRM_TYPE_REMOTE_COADDR 8
443
444 int (*init_state)(struct xfrm_state *x,
445 struct netlink_ext_ack *extack);
446 void (*destructor)(struct xfrm_state *);
447 int (*input)(struct xfrm_state *, struct sk_buff *skb);
448 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
449 int (*reject)(struct xfrm_state *, struct sk_buff *,
450 const struct flowi *);
451 };
452
453 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
454 void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
455
456 struct xfrm_type_offload {
457 struct module *owner;
458 u8 proto;
459 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
460 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
461 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
462 };
463
464 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
465 void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
466 void xfrm_set_type_offload(struct xfrm_state *x);
xfrm_unset_type_offload(struct xfrm_state * x)467 static inline void xfrm_unset_type_offload(struct xfrm_state *x)
468 {
469 if (!x->type_offload)
470 return;
471
472 module_put(x->type_offload->owner);
473 x->type_offload = NULL;
474 }
475
476 /**
477 * struct xfrm_mode_cbs - XFRM mode callbacks
478 * @owner: module owner or NULL
479 * @init_state: Add/init mode specific state in `xfrm_state *x`
480 * @clone_state: Copy mode specific values from `orig` to new state `x`
481 * @destroy_state: Cleanup mode specific state from `xfrm_state *x`
482 * @user_init: Process mode specific netlink attributes from user
483 * @copy_to_user: Add netlink attributes to `attrs` based on state in `x`
484 * @sa_len: Return space required to store mode specific netlink attributes
485 * @get_inner_mtu: Return avail payload space after removing encap overhead
486 * @input: Process received packet from SA using mode
487 * @output: Output given packet using mode
488 * @prepare_output: Add mode specific encapsulation to packet in skb. On return
489 * `transport_header` should point at ESP header, `network_header` should
490 * point at outer IP header and `mac_header` should opint at the
491 * protocol/nexthdr field of the outer IP.
492 *
493 * One should examine and understand the specific uses of these callbacks in
494 * xfrm for further detail on how and when these functions are called. RTSL.
495 */
496 struct xfrm_mode_cbs {
497 struct module *owner;
498 int (*init_state)(struct xfrm_state *x);
499 int (*clone_state)(struct xfrm_state *x, struct xfrm_state *orig);
500 void (*destroy_state)(struct xfrm_state *x);
501 int (*user_init)(struct net *net, struct xfrm_state *x,
502 struct nlattr **attrs,
503 struct netlink_ext_ack *extack);
504 int (*copy_to_user)(struct xfrm_state *x, struct sk_buff *skb);
505 unsigned int (*sa_len)(const struct xfrm_state *x);
506 u32 (*get_inner_mtu)(struct xfrm_state *x, int outer_mtu);
507 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
508 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
509 int (*prepare_output)(struct xfrm_state *x, struct sk_buff *skb);
510 };
511
512 int xfrm_register_mode_cbs(u8 mode, const struct xfrm_mode_cbs *mode_cbs);
513 void xfrm_unregister_mode_cbs(u8 mode);
514
xfrm_af2proto(unsigned int family)515 static inline int xfrm_af2proto(unsigned int family)
516 {
517 switch(family) {
518 case AF_INET:
519 return IPPROTO_IPIP;
520 case AF_INET6:
521 return IPPROTO_IPV6;
522 default:
523 return 0;
524 }
525 }
526
xfrm_ip2inner_mode(struct xfrm_state * x,int ipproto)527 static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
528 {
529 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
530 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
531 return &x->inner_mode;
532 else
533 return &x->inner_mode_iaf;
534 }
535
536 struct xfrm_tmpl {
537 /* id in template is interpreted as:
538 * daddr - destination of tunnel, may be zero for transport mode.
539 * spi - zero to acquire spi. Not zero if spi is static, then
540 * daddr must be fixed too.
541 * proto - AH/ESP/IPCOMP
542 */
543 struct xfrm_id id;
544
545 /* Source address of tunnel. Ignored, if it is not a tunnel. */
546 xfrm_address_t saddr;
547
548 unsigned short encap_family;
549
550 u32 reqid;
551
552 /* Mode: transport, tunnel etc. */
553 u8 mode;
554
555 /* Sharing mode: unique, this session only, this user only etc. */
556 u8 share;
557
558 /* May skip this transfomration if no SA is found */
559 u8 optional;
560
561 /* Skip aalgos/ealgos/calgos checks. */
562 u8 allalgs;
563
564 /* Bit mask of algos allowed for acquisition */
565 u32 aalgos;
566 u32 ealgos;
567 u32 calgos;
568 };
569
570 #define XFRM_MAX_DEPTH 6
571 #define XFRM_MAX_OFFLOAD_DEPTH 1
572
573 struct xfrm_policy_walk_entry {
574 struct list_head all;
575 u8 dead;
576 };
577
578 struct xfrm_policy_walk {
579 struct xfrm_policy_walk_entry walk;
580 u8 type;
581 u32 seq;
582 };
583
584 struct xfrm_policy_queue {
585 struct sk_buff_head hold_queue;
586 struct timer_list hold_timer;
587 unsigned long timeout;
588 };
589
590 /**
591 * struct xfrm_policy - xfrm policy
592 * @xp_net: network namespace the policy lives in
593 * @bydst: hlist node for SPD hash table or rbtree list
594 * @byidx: hlist node for index hash table
595 * @state_cache_list: hlist head for policy cached xfrm states
596 * @lock: serialize changes to policy structure members
597 * @refcnt: reference count, freed once it reaches 0
598 * @pos: kernel internal tie-breaker to determine age of policy
599 * @timer: timer
600 * @genid: generation, used to invalidate old policies
601 * @priority: priority, set by userspace
602 * @index: policy index (autogenerated)
603 * @if_id: virtual xfrm interface id
604 * @mark: packet mark
605 * @selector: selector
606 * @lft: liftime configuration data
607 * @curlft: liftime state
608 * @walk: list head on pernet policy list
609 * @polq: queue to hold packets while aqcuire operaion in progress
610 * @bydst_reinsert: policy tree node needs to be merged
611 * @type: XFRM_POLICY_TYPE_MAIN or _SUB
612 * @action: XFRM_POLICY_ALLOW or _BLOCK
613 * @flags: XFRM_POLICY_LOCALOK, XFRM_POLICY_ICMP
614 * @xfrm_nr: number of used templates in @xfrm_vec
615 * @family: protocol family
616 * @security: SELinux security label
617 * @xfrm_vec: array of templates to resolve state
618 * @rcu: rcu head, used to defer memory release
619 * @xdo: hardware offload state
620 */
621 struct xfrm_policy {
622 possible_net_t xp_net;
623 struct hlist_node bydst;
624 struct hlist_node byidx;
625
626 struct hlist_head state_cache_list;
627
628 /* This lock only affects elements except for entry. */
629 rwlock_t lock;
630 refcount_t refcnt;
631 u32 pos;
632 struct timer_list timer;
633
634 atomic_t genid;
635 u32 priority;
636 u32 index;
637 u32 if_id;
638 struct xfrm_mark mark;
639 struct xfrm_selector selector;
640 struct xfrm_lifetime_cfg lft;
641 struct xfrm_lifetime_cur curlft;
642 struct xfrm_policy_walk_entry walk;
643 struct xfrm_policy_queue polq;
644 bool bydst_reinsert;
645 u8 type;
646 u8 action;
647 u8 flags;
648 u8 xfrm_nr;
649 u16 family;
650 struct xfrm_sec_ctx *security;
651 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
652 struct rcu_head rcu;
653
654 struct xfrm_dev_offload xdo;
655 };
656
xp_net(const struct xfrm_policy * xp)657 static inline struct net *xp_net(const struct xfrm_policy *xp)
658 {
659 return read_pnet(&xp->xp_net);
660 }
661
662 struct xfrm_kmaddress {
663 xfrm_address_t local;
664 xfrm_address_t remote;
665 u32 reserved;
666 u16 family;
667 };
668
669 struct xfrm_migrate {
670 xfrm_address_t old_daddr;
671 xfrm_address_t old_saddr;
672 xfrm_address_t new_daddr;
673 xfrm_address_t new_saddr;
674 u8 proto;
675 u8 mode;
676 u16 reserved;
677 u32 reqid;
678 u16 old_family;
679 u16 new_family;
680 };
681
682 #define XFRM_KM_TIMEOUT 30
683 /* what happened */
684 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
685 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
686
687 /* default aevent timeout in units of 100ms */
688 #define XFRM_AE_ETIME 10
689 /* Async Event timer multiplier */
690 #define XFRM_AE_ETH_M 10
691 /* default seq threshold size */
692 #define XFRM_AE_SEQT_SIZE 2
693
694 struct xfrm_mgr {
695 struct list_head list;
696 int (*notify)(struct xfrm_state *x, const struct km_event *c);
697 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
698 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
699 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
700 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
701 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
702 int (*migrate)(const struct xfrm_selector *sel,
703 u8 dir, u8 type,
704 const struct xfrm_migrate *m,
705 int num_bundles,
706 const struct xfrm_kmaddress *k,
707 const struct xfrm_encap_tmpl *encap);
708 bool (*is_alive)(const struct km_event *c);
709 };
710
711 void xfrm_register_km(struct xfrm_mgr *km);
712 void xfrm_unregister_km(struct xfrm_mgr *km);
713
714 struct xfrm_tunnel_skb_cb {
715 union {
716 struct inet_skb_parm h4;
717 struct inet6_skb_parm h6;
718 } header;
719
720 union {
721 struct ip_tunnel *ip4;
722 struct ip6_tnl *ip6;
723 } tunnel;
724 };
725
726 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
727
728 /*
729 * This structure is used for the duration where packets are being
730 * transformed by IPsec. As soon as the packet leaves IPsec the
731 * area beyond the generic IP part may be overwritten.
732 */
733 struct xfrm_skb_cb {
734 struct xfrm_tunnel_skb_cb header;
735
736 /* Sequence number for replay protection. */
737 union {
738 struct {
739 __u32 low;
740 __u32 hi;
741 } output;
742 struct {
743 __be32 low;
744 __be32 hi;
745 } input;
746 } seq;
747 };
748
749 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
750
751 /*
752 * This structure is used by the afinfo prepare_input/prepare_output functions
753 * to transmit header information to the mode input/output functions.
754 */
755 struct xfrm_mode_skb_cb {
756 struct xfrm_tunnel_skb_cb header;
757
758 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
759 __be16 id;
760 __be16 frag_off;
761
762 /* IP header length (excluding options or extension headers). */
763 u8 ihl;
764
765 /* TOS for IPv4, class for IPv6. */
766 u8 tos;
767
768 /* TTL for IPv4, hop limitfor IPv6. */
769 u8 ttl;
770
771 /* Protocol for IPv4, NH for IPv6. */
772 u8 protocol;
773
774 /* Option length for IPv4, zero for IPv6. */
775 u8 optlen;
776
777 /* Used by IPv6 only, zero for IPv4. */
778 u8 flow_lbl[3];
779 };
780
781 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
782
783 /*
784 * This structure is used by the input processing to locate the SPI and
785 * related information.
786 */
787 struct xfrm_spi_skb_cb {
788 struct xfrm_tunnel_skb_cb header;
789
790 unsigned int daddroff;
791 unsigned int family;
792 __be32 seq;
793 };
794
795 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
796
797 #ifdef CONFIG_AUDITSYSCALL
xfrm_audit_start(const char * op)798 static inline struct audit_buffer *xfrm_audit_start(const char *op)
799 {
800 struct audit_buffer *audit_buf = NULL;
801
802 if (audit_enabled == AUDIT_OFF)
803 return NULL;
804 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
805 AUDIT_MAC_IPSEC_EVENT);
806 if (audit_buf == NULL)
807 return NULL;
808 audit_log_format(audit_buf, "op=%s", op);
809 return audit_buf;
810 }
811
xfrm_audit_helper_usrinfo(bool task_valid,struct audit_buffer * audit_buf)812 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
813 struct audit_buffer *audit_buf)
814 {
815 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
816 audit_get_loginuid(current) :
817 INVALID_UID);
818 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
819 AUDIT_SID_UNSET;
820
821 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
822 audit_log_task_context(audit_buf);
823 }
824
825 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
826 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
827 bool task_valid);
828 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
829 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
830 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
831 struct sk_buff *skb);
832 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
833 __be32 net_seq);
834 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
835 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
836 __be32 net_seq);
837 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
838 u8 proto);
839 #else
840
xfrm_audit_policy_add(struct xfrm_policy * xp,int result,bool task_valid)841 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
842 bool task_valid)
843 {
844 }
845
xfrm_audit_policy_delete(struct xfrm_policy * xp,int result,bool task_valid)846 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
847 bool task_valid)
848 {
849 }
850
xfrm_audit_state_add(struct xfrm_state * x,int result,bool task_valid)851 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
852 bool task_valid)
853 {
854 }
855
xfrm_audit_state_delete(struct xfrm_state * x,int result,bool task_valid)856 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
857 bool task_valid)
858 {
859 }
860
xfrm_audit_state_replay_overflow(struct xfrm_state * x,struct sk_buff * skb)861 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
862 struct sk_buff *skb)
863 {
864 }
865
xfrm_audit_state_replay(struct xfrm_state * x,struct sk_buff * skb,__be32 net_seq)866 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
867 struct sk_buff *skb, __be32 net_seq)
868 {
869 }
870
xfrm_audit_state_notfound_simple(struct sk_buff * skb,u16 family)871 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
872 u16 family)
873 {
874 }
875
xfrm_audit_state_notfound(struct sk_buff * skb,u16 family,__be32 net_spi,__be32 net_seq)876 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
877 __be32 net_spi, __be32 net_seq)
878 {
879 }
880
xfrm_audit_state_icvfail(struct xfrm_state * x,struct sk_buff * skb,u8 proto)881 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
882 struct sk_buff *skb, u8 proto)
883 {
884 }
885 #endif /* CONFIG_AUDITSYSCALL */
886
xfrm_pol_hold(struct xfrm_policy * policy)887 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
888 {
889 if (likely(policy != NULL))
890 refcount_inc(&policy->refcnt);
891 }
892
893 void xfrm_policy_destroy(struct xfrm_policy *policy);
894
xfrm_pol_put(struct xfrm_policy * policy)895 static inline void xfrm_pol_put(struct xfrm_policy *policy)
896 {
897 if (refcount_dec_and_test(&policy->refcnt))
898 xfrm_policy_destroy(policy);
899 }
900
xfrm_pols_put(struct xfrm_policy ** pols,int npols)901 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
902 {
903 int i;
904 for (i = npols - 1; i >= 0; --i)
905 xfrm_pol_put(pols[i]);
906 }
907
908 void __xfrm_state_destroy(struct xfrm_state *, bool);
909
__xfrm_state_put(struct xfrm_state * x)910 static inline void __xfrm_state_put(struct xfrm_state *x)
911 {
912 refcount_dec(&x->refcnt);
913 }
914
xfrm_state_put(struct xfrm_state * x)915 static inline void xfrm_state_put(struct xfrm_state *x)
916 {
917 if (refcount_dec_and_test(&x->refcnt))
918 __xfrm_state_destroy(x, false);
919 }
920
xfrm_state_put_sync(struct xfrm_state * x)921 static inline void xfrm_state_put_sync(struct xfrm_state *x)
922 {
923 if (refcount_dec_and_test(&x->refcnt))
924 __xfrm_state_destroy(x, true);
925 }
926
xfrm_state_hold(struct xfrm_state * x)927 static inline void xfrm_state_hold(struct xfrm_state *x)
928 {
929 refcount_inc(&x->refcnt);
930 }
931
addr_match(const void * token1,const void * token2,unsigned int prefixlen)932 static inline bool addr_match(const void *token1, const void *token2,
933 unsigned int prefixlen)
934 {
935 const __be32 *a1 = token1;
936 const __be32 *a2 = token2;
937 unsigned int pdw;
938 unsigned int pbi;
939
940 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
941 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
942
943 if (pdw)
944 if (memcmp(a1, a2, pdw << 2))
945 return false;
946
947 if (pbi) {
948 __be32 mask;
949
950 mask = htonl((0xffffffff) << (32 - pbi));
951
952 if ((a1[pdw] ^ a2[pdw]) & mask)
953 return false;
954 }
955
956 return true;
957 }
958
addr4_match(__be32 a1,__be32 a2,u8 prefixlen)959 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
960 {
961 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
962 if (sizeof(long) == 4 && prefixlen == 0)
963 return true;
964 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
965 }
966
967 static __inline__
xfrm_flowi_sport(const struct flowi * fl,const union flowi_uli * uli)968 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
969 {
970 __be16 port;
971 switch(fl->flowi_proto) {
972 case IPPROTO_TCP:
973 case IPPROTO_UDP:
974 case IPPROTO_UDPLITE:
975 case IPPROTO_SCTP:
976 port = uli->ports.sport;
977 break;
978 case IPPROTO_ICMP:
979 case IPPROTO_ICMPV6:
980 port = htons(uli->icmpt.type);
981 break;
982 case IPPROTO_MH:
983 port = htons(uli->mht.type);
984 break;
985 case IPPROTO_GRE:
986 port = htons(ntohl(uli->gre_key) >> 16);
987 break;
988 default:
989 port = 0; /*XXX*/
990 }
991 return port;
992 }
993
994 static __inline__
xfrm_flowi_dport(const struct flowi * fl,const union flowi_uli * uli)995 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
996 {
997 __be16 port;
998 switch(fl->flowi_proto) {
999 case IPPROTO_TCP:
1000 case IPPROTO_UDP:
1001 case IPPROTO_UDPLITE:
1002 case IPPROTO_SCTP:
1003 port = uli->ports.dport;
1004 break;
1005 case IPPROTO_ICMP:
1006 case IPPROTO_ICMPV6:
1007 port = htons(uli->icmpt.code);
1008 break;
1009 case IPPROTO_GRE:
1010 port = htons(ntohl(uli->gre_key) & 0xffff);
1011 break;
1012 default:
1013 port = 0; /*XXX*/
1014 }
1015 return port;
1016 }
1017
1018 bool xfrm_selector_match(const struct xfrm_selector *sel,
1019 const struct flowi *fl, unsigned short family);
1020
1021 #ifdef CONFIG_SECURITY_NETWORK_XFRM
1022 /* If neither has a context --> match
1023 * Otherwise, both must have a context and the sids, doi, alg must match
1024 */
xfrm_sec_ctx_match(struct xfrm_sec_ctx * s1,struct xfrm_sec_ctx * s2)1025 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
1026 {
1027 return ((!s1 && !s2) ||
1028 (s1 && s2 &&
1029 (s1->ctx_sid == s2->ctx_sid) &&
1030 (s1->ctx_doi == s2->ctx_doi) &&
1031 (s1->ctx_alg == s2->ctx_alg)));
1032 }
1033 #else
xfrm_sec_ctx_match(struct xfrm_sec_ctx * s1,struct xfrm_sec_ctx * s2)1034 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
1035 {
1036 return true;
1037 }
1038 #endif
1039
1040 /* A struct encoding bundle of transformations to apply to some set of flow.
1041 *
1042 * xdst->child points to the next element of bundle.
1043 * dst->xfrm points to an instanse of transformer.
1044 *
1045 * Due to unfortunate limitations of current routing cache, which we
1046 * have no time to fix, it mirrors struct rtable and bound to the same
1047 * routing key, including saddr,daddr. However, we can have many of
1048 * bundles differing by session id. All the bundles grow from a parent
1049 * policy rule.
1050 */
1051 struct xfrm_dst {
1052 union {
1053 struct dst_entry dst;
1054 struct rtable rt;
1055 struct rt6_info rt6;
1056 } u;
1057 struct dst_entry *route;
1058 struct dst_entry *child;
1059 struct dst_entry *path;
1060 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
1061 int num_pols, num_xfrms;
1062 u32 xfrm_genid;
1063 u32 policy_genid;
1064 u32 route_mtu_cached;
1065 u32 child_mtu_cached;
1066 u32 route_cookie;
1067 u32 path_cookie;
1068 };
1069
xfrm_dst_path(const struct dst_entry * dst)1070 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
1071 {
1072 #ifdef CONFIG_XFRM
1073 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
1074 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
1075
1076 return xdst->path;
1077 }
1078 #endif
1079 return (struct dst_entry *) dst;
1080 }
1081
xfrm_dst_child(const struct dst_entry * dst)1082 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
1083 {
1084 #ifdef CONFIG_XFRM
1085 if (dst->xfrm || (dst->flags & DST_XFRM_QUEUE)) {
1086 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
1087 return xdst->child;
1088 }
1089 #endif
1090 return NULL;
1091 }
1092
1093 #ifdef CONFIG_XFRM
xfrm_dst_set_child(struct xfrm_dst * xdst,struct dst_entry * child)1094 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
1095 {
1096 xdst->child = child;
1097 }
1098
xfrm_dst_destroy(struct xfrm_dst * xdst)1099 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
1100 {
1101 xfrm_pols_put(xdst->pols, xdst->num_pols);
1102 dst_release(xdst->route);
1103 if (likely(xdst->u.dst.xfrm))
1104 xfrm_state_put(xdst->u.dst.xfrm);
1105 }
1106 #endif
1107
1108 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
1109
1110 struct xfrm_if_parms {
1111 int link; /* ifindex of underlying L2 interface */
1112 u32 if_id; /* interface identifier */
1113 bool collect_md;
1114 };
1115
1116 struct xfrm_if {
1117 struct xfrm_if __rcu *next; /* next interface in list */
1118 struct net_device *dev; /* virtual device associated with interface */
1119 struct net *net; /* netns for packet i/o */
1120 struct xfrm_if_parms p; /* interface parms */
1121
1122 struct gro_cells gro_cells;
1123 };
1124
1125 struct xfrm_offload {
1126 /* Output sequence number for replay protection on offloading. */
1127 struct {
1128 __u32 low;
1129 __u32 hi;
1130 } seq;
1131
1132 __u32 flags;
1133 #define SA_DELETE_REQ 1
1134 #define CRYPTO_DONE 2
1135 #define CRYPTO_NEXT_DONE 4
1136 #define CRYPTO_FALLBACK 8
1137 #define XFRM_GSO_SEGMENT 16
1138 #define XFRM_GRO 32
1139 /* 64 is free */
1140 #define XFRM_DEV_RESUME 128
1141 #define XFRM_XMIT 256
1142
1143 __u32 status;
1144 #define CRYPTO_SUCCESS 1
1145 #define CRYPTO_GENERIC_ERROR 2
1146 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1147 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1148 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1149 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1150 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1151 #define CRYPTO_INVALID_PROTOCOL 128
1152
1153 /* Used to keep whole l2 header for transport mode GRO */
1154 __u32 orig_mac_len;
1155
1156 __u8 proto;
1157 __u8 inner_ipproto;
1158 };
1159
1160 struct sec_path {
1161 int len;
1162 int olen;
1163 int verified_cnt;
1164
1165 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1166 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1167 };
1168
1169 struct sec_path *secpath_set(struct sk_buff *skb);
1170
1171 static inline void
secpath_reset(struct sk_buff * skb)1172 secpath_reset(struct sk_buff *skb)
1173 {
1174 #ifdef CONFIG_XFRM
1175 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1176 #endif
1177 }
1178
1179 static inline int
xfrm_addr_any(const xfrm_address_t * addr,unsigned short family)1180 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1181 {
1182 switch (family) {
1183 case AF_INET:
1184 return addr->a4 == 0;
1185 case AF_INET6:
1186 return ipv6_addr_any(&addr->in6);
1187 }
1188 return 0;
1189 }
1190
1191 static inline int
__xfrm4_state_addr_cmp(const struct xfrm_tmpl * tmpl,const struct xfrm_state * x)1192 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1193 {
1194 return (tmpl->saddr.a4 &&
1195 tmpl->saddr.a4 != x->props.saddr.a4);
1196 }
1197
1198 static inline int
__xfrm6_state_addr_cmp(const struct xfrm_tmpl * tmpl,const struct xfrm_state * x)1199 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1200 {
1201 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1202 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1203 }
1204
1205 static inline int
xfrm_state_addr_cmp(const struct xfrm_tmpl * tmpl,const struct xfrm_state * x,unsigned short family)1206 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1207 {
1208 switch (family) {
1209 case AF_INET:
1210 return __xfrm4_state_addr_cmp(tmpl, x);
1211 case AF_INET6:
1212 return __xfrm6_state_addr_cmp(tmpl, x);
1213 }
1214 return !0;
1215 }
1216
1217 #ifdef CONFIG_XFRM
xfrm_input_state(struct sk_buff * skb)1218 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1219 {
1220 struct sec_path *sp = skb_sec_path(skb);
1221
1222 return sp->xvec[sp->len - 1];
1223 }
1224 #endif
1225
xfrm_offload(struct sk_buff * skb)1226 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1227 {
1228 #ifdef CONFIG_XFRM
1229 struct sec_path *sp = skb_sec_path(skb);
1230
1231 if (!sp || !sp->olen || sp->len != sp->olen)
1232 return NULL;
1233
1234 return &sp->ovec[sp->olen - 1];
1235 #else
1236 return NULL;
1237 #endif
1238 }
1239
1240 #ifdef CONFIG_XFRM
1241 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1242 unsigned short family);
1243
__xfrm_check_nopolicy(struct net * net,struct sk_buff * skb,int dir)1244 static inline bool __xfrm_check_nopolicy(struct net *net, struct sk_buff *skb,
1245 int dir)
1246 {
1247 if (!net->xfrm.policy_count[dir] && !secpath_exists(skb))
1248 return net->xfrm.policy_default[dir] == XFRM_USERPOLICY_ACCEPT;
1249
1250 return false;
1251 }
1252
__xfrm_check_dev_nopolicy(struct sk_buff * skb,int dir,unsigned short family)1253 static inline bool __xfrm_check_dev_nopolicy(struct sk_buff *skb,
1254 int dir, unsigned short family)
1255 {
1256 if (dir != XFRM_POLICY_OUT && family == AF_INET) {
1257 /* same dst may be used for traffic originating from
1258 * devices with different policy settings.
1259 */
1260 return IPCB(skb)->flags & IPSKB_NOPOLICY;
1261 }
1262 return skb_dst(skb) && (skb_dst(skb)->flags & DST_NOPOLICY);
1263 }
1264
__xfrm_policy_check2(struct sock * sk,int dir,struct sk_buff * skb,unsigned int family,int reverse)1265 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1266 struct sk_buff *skb,
1267 unsigned int family, int reverse)
1268 {
1269 struct net *net = dev_net(skb->dev);
1270 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1271 struct xfrm_offload *xo = xfrm_offload(skb);
1272 struct xfrm_state *x;
1273
1274 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1275 return __xfrm_policy_check(sk, ndir, skb, family);
1276
1277 if (xo) {
1278 x = xfrm_input_state(skb);
1279 if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET) {
1280 bool check = (xo->flags & CRYPTO_DONE) &&
1281 (xo->status & CRYPTO_SUCCESS);
1282
1283 /* The packets here are plain ones and secpath was
1284 * needed to indicate that hardware already handled
1285 * them and there is no need to do nothing in addition.
1286 *
1287 * Consume secpath which was set by drivers.
1288 */
1289 secpath_reset(skb);
1290 return check;
1291 }
1292 }
1293
1294 return __xfrm_check_nopolicy(net, skb, dir) ||
1295 __xfrm_check_dev_nopolicy(skb, dir, family) ||
1296 __xfrm_policy_check(sk, ndir, skb, family);
1297 }
1298
xfrm_policy_check(struct sock * sk,int dir,struct sk_buff * skb,unsigned short family)1299 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1300 {
1301 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1302 }
1303
xfrm4_policy_check(struct sock * sk,int dir,struct sk_buff * skb)1304 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1305 {
1306 return xfrm_policy_check(sk, dir, skb, AF_INET);
1307 }
1308
xfrm6_policy_check(struct sock * sk,int dir,struct sk_buff * skb)1309 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1310 {
1311 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1312 }
1313
xfrm4_policy_check_reverse(struct sock * sk,int dir,struct sk_buff * skb)1314 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1315 struct sk_buff *skb)
1316 {
1317 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1318 }
1319
xfrm6_policy_check_reverse(struct sock * sk,int dir,struct sk_buff * skb)1320 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1321 struct sk_buff *skb)
1322 {
1323 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1324 }
1325
1326 int __xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl,
1327 unsigned int family, int reverse);
1328
xfrm_decode_session(struct net * net,struct sk_buff * skb,struct flowi * fl,unsigned int family)1329 static inline int xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl,
1330 unsigned int family)
1331 {
1332 return __xfrm_decode_session(net, skb, fl, family, 0);
1333 }
1334
xfrm_decode_session_reverse(struct net * net,struct sk_buff * skb,struct flowi * fl,unsigned int family)1335 static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb,
1336 struct flowi *fl,
1337 unsigned int family)
1338 {
1339 return __xfrm_decode_session(net, skb, fl, family, 1);
1340 }
1341
1342 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1343
xfrm_route_forward(struct sk_buff * skb,unsigned short family)1344 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1345 {
1346 struct net *net = dev_net(skb->dev);
1347
1348 if (!net->xfrm.policy_count[XFRM_POLICY_OUT] &&
1349 net->xfrm.policy_default[XFRM_POLICY_OUT] == XFRM_USERPOLICY_ACCEPT)
1350 return true;
1351
1352 return (skb_dst(skb)->flags & DST_NOXFRM) ||
1353 __xfrm_route_forward(skb, family);
1354 }
1355
xfrm4_route_forward(struct sk_buff * skb)1356 static inline int xfrm4_route_forward(struct sk_buff *skb)
1357 {
1358 return xfrm_route_forward(skb, AF_INET);
1359 }
1360
xfrm6_route_forward(struct sk_buff * skb)1361 static inline int xfrm6_route_forward(struct sk_buff *skb)
1362 {
1363 return xfrm_route_forward(skb, AF_INET6);
1364 }
1365
1366 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1367
xfrm_sk_clone_policy(struct sock * sk,const struct sock * osk)1368 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1369 {
1370 if (!sk_fullsock(osk))
1371 return 0;
1372 sk->sk_policy[0] = NULL;
1373 sk->sk_policy[1] = NULL;
1374 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1375 return __xfrm_sk_clone_policy(sk, osk);
1376 return 0;
1377 }
1378
1379 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1380
xfrm_sk_free_policy(struct sock * sk)1381 static inline void xfrm_sk_free_policy(struct sock *sk)
1382 {
1383 struct xfrm_policy *pol;
1384
1385 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1386 if (unlikely(pol != NULL)) {
1387 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1388 sk->sk_policy[0] = NULL;
1389 }
1390 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1391 if (unlikely(pol != NULL)) {
1392 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1393 sk->sk_policy[1] = NULL;
1394 }
1395 }
1396
1397 #else
1398
xfrm_sk_free_policy(struct sock * sk)1399 static inline void xfrm_sk_free_policy(struct sock *sk) {}
xfrm_sk_clone_policy(struct sock * sk,const struct sock * osk)1400 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
xfrm6_route_forward(struct sk_buff * skb)1401 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
xfrm4_route_forward(struct sk_buff * skb)1402 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
xfrm6_policy_check(struct sock * sk,int dir,struct sk_buff * skb)1403 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1404 {
1405 return 1;
1406 }
xfrm4_policy_check(struct sock * sk,int dir,struct sk_buff * skb)1407 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1408 {
1409 return 1;
1410 }
xfrm_policy_check(struct sock * sk,int dir,struct sk_buff * skb,unsigned short family)1411 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1412 {
1413 return 1;
1414 }
xfrm_decode_session_reverse(struct net * net,struct sk_buff * skb,struct flowi * fl,unsigned int family)1415 static inline int xfrm_decode_session_reverse(struct net *net, struct sk_buff *skb,
1416 struct flowi *fl,
1417 unsigned int family)
1418 {
1419 return -ENOSYS;
1420 }
xfrm4_policy_check_reverse(struct sock * sk,int dir,struct sk_buff * skb)1421 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1422 struct sk_buff *skb)
1423 {
1424 return 1;
1425 }
xfrm6_policy_check_reverse(struct sock * sk,int dir,struct sk_buff * skb)1426 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1427 struct sk_buff *skb)
1428 {
1429 return 1;
1430 }
1431 #endif
1432
1433 static __inline__
xfrm_flowi_daddr(const struct flowi * fl,unsigned short family)1434 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1435 {
1436 switch (family){
1437 case AF_INET:
1438 return (xfrm_address_t *)&fl->u.ip4.daddr;
1439 case AF_INET6:
1440 return (xfrm_address_t *)&fl->u.ip6.daddr;
1441 }
1442 return NULL;
1443 }
1444
1445 static __inline__
xfrm_flowi_saddr(const struct flowi * fl,unsigned short family)1446 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1447 {
1448 switch (family){
1449 case AF_INET:
1450 return (xfrm_address_t *)&fl->u.ip4.saddr;
1451 case AF_INET6:
1452 return (xfrm_address_t *)&fl->u.ip6.saddr;
1453 }
1454 return NULL;
1455 }
1456
1457 static __inline__
xfrm_flowi_addr_get(const struct flowi * fl,xfrm_address_t * saddr,xfrm_address_t * daddr,unsigned short family)1458 void xfrm_flowi_addr_get(const struct flowi *fl,
1459 xfrm_address_t *saddr, xfrm_address_t *daddr,
1460 unsigned short family)
1461 {
1462 switch(family) {
1463 case AF_INET:
1464 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1465 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1466 break;
1467 case AF_INET6:
1468 saddr->in6 = fl->u.ip6.saddr;
1469 daddr->in6 = fl->u.ip6.daddr;
1470 break;
1471 }
1472 }
1473
1474 static __inline__ int
__xfrm4_state_addr_check(const struct xfrm_state * x,const xfrm_address_t * daddr,const xfrm_address_t * saddr)1475 __xfrm4_state_addr_check(const struct xfrm_state *x,
1476 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1477 {
1478 if (daddr->a4 == x->id.daddr.a4 &&
1479 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1480 return 1;
1481 return 0;
1482 }
1483
1484 static __inline__ int
__xfrm6_state_addr_check(const struct xfrm_state * x,const xfrm_address_t * daddr,const xfrm_address_t * saddr)1485 __xfrm6_state_addr_check(const struct xfrm_state *x,
1486 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1487 {
1488 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1489 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1490 ipv6_addr_any((struct in6_addr *)saddr) ||
1491 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1492 return 1;
1493 return 0;
1494 }
1495
1496 static __inline__ int
xfrm_state_addr_check(const struct xfrm_state * x,const xfrm_address_t * daddr,const xfrm_address_t * saddr,unsigned short family)1497 xfrm_state_addr_check(const struct xfrm_state *x,
1498 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1499 unsigned short family)
1500 {
1501 switch (family) {
1502 case AF_INET:
1503 return __xfrm4_state_addr_check(x, daddr, saddr);
1504 case AF_INET6:
1505 return __xfrm6_state_addr_check(x, daddr, saddr);
1506 }
1507 return 0;
1508 }
1509
1510 static __inline__ int
xfrm_state_addr_flow_check(const struct xfrm_state * x,const struct flowi * fl,unsigned short family)1511 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1512 unsigned short family)
1513 {
1514 switch (family) {
1515 case AF_INET:
1516 return __xfrm4_state_addr_check(x,
1517 (const xfrm_address_t *)&fl->u.ip4.daddr,
1518 (const xfrm_address_t *)&fl->u.ip4.saddr);
1519 case AF_INET6:
1520 return __xfrm6_state_addr_check(x,
1521 (const xfrm_address_t *)&fl->u.ip6.daddr,
1522 (const xfrm_address_t *)&fl->u.ip6.saddr);
1523 }
1524 return 0;
1525 }
1526
xfrm_state_kern(const struct xfrm_state * x)1527 static inline int xfrm_state_kern(const struct xfrm_state *x)
1528 {
1529 return atomic_read(&x->tunnel_users);
1530 }
1531
xfrm_id_proto_valid(u8 proto)1532 static inline bool xfrm_id_proto_valid(u8 proto)
1533 {
1534 switch (proto) {
1535 case IPPROTO_AH:
1536 case IPPROTO_ESP:
1537 case IPPROTO_COMP:
1538 #if IS_ENABLED(CONFIG_IPV6)
1539 case IPPROTO_ROUTING:
1540 case IPPROTO_DSTOPTS:
1541 #endif
1542 return true;
1543 default:
1544 return false;
1545 }
1546 }
1547
1548 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
xfrm_id_proto_match(u8 proto,u8 userproto)1549 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1550 {
1551 return (!userproto || proto == userproto ||
1552 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1553 proto == IPPROTO_ESP ||
1554 proto == IPPROTO_COMP)));
1555 }
1556
1557 /*
1558 * xfrm algorithm information
1559 */
1560 struct xfrm_algo_aead_info {
1561 char *geniv;
1562 u16 icv_truncbits;
1563 };
1564
1565 struct xfrm_algo_auth_info {
1566 u16 icv_truncbits;
1567 u16 icv_fullbits;
1568 };
1569
1570 struct xfrm_algo_encr_info {
1571 char *geniv;
1572 u16 blockbits;
1573 u16 defkeybits;
1574 };
1575
1576 struct xfrm_algo_comp_info {
1577 u16 threshold;
1578 };
1579
1580 struct xfrm_algo_desc {
1581 char *name;
1582 char *compat;
1583 u8 available:1;
1584 u8 pfkey_supported:1;
1585 union {
1586 struct xfrm_algo_aead_info aead;
1587 struct xfrm_algo_auth_info auth;
1588 struct xfrm_algo_encr_info encr;
1589 struct xfrm_algo_comp_info comp;
1590 } uinfo;
1591 struct sadb_alg desc;
1592 };
1593
1594 /* XFRM protocol handlers. */
1595 struct xfrm4_protocol {
1596 int (*handler)(struct sk_buff *skb);
1597 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1598 int encap_type);
1599 int (*cb_handler)(struct sk_buff *skb, int err);
1600 int (*err_handler)(struct sk_buff *skb, u32 info);
1601
1602 struct xfrm4_protocol __rcu *next;
1603 int priority;
1604 };
1605
1606 struct xfrm6_protocol {
1607 int (*handler)(struct sk_buff *skb);
1608 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1609 int encap_type);
1610 int (*cb_handler)(struct sk_buff *skb, int err);
1611 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1612 u8 type, u8 code, int offset, __be32 info);
1613
1614 struct xfrm6_protocol __rcu *next;
1615 int priority;
1616 };
1617
1618 /* XFRM tunnel handlers. */
1619 struct xfrm_tunnel {
1620 int (*handler)(struct sk_buff *skb);
1621 int (*cb_handler)(struct sk_buff *skb, int err);
1622 int (*err_handler)(struct sk_buff *skb, u32 info);
1623
1624 struct xfrm_tunnel __rcu *next;
1625 int priority;
1626 };
1627
1628 struct xfrm6_tunnel {
1629 int (*handler)(struct sk_buff *skb);
1630 int (*cb_handler)(struct sk_buff *skb, int err);
1631 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1632 u8 type, u8 code, int offset, __be32 info);
1633 struct xfrm6_tunnel __rcu *next;
1634 int priority;
1635 };
1636
1637 void xfrm_init(void);
1638 void xfrm4_init(void);
1639 int xfrm_state_init(struct net *net);
1640 void xfrm_state_fini(struct net *net);
1641 void xfrm4_state_init(void);
1642 void xfrm4_protocol_init(void);
1643 #ifdef CONFIG_XFRM
1644 int xfrm6_init(void);
1645 void xfrm6_fini(void);
1646 int xfrm6_state_init(void);
1647 void xfrm6_state_fini(void);
1648 int xfrm6_protocol_init(void);
1649 void xfrm6_protocol_fini(void);
1650 #else
xfrm6_init(void)1651 static inline int xfrm6_init(void)
1652 {
1653 return 0;
1654 }
xfrm6_fini(void)1655 static inline void xfrm6_fini(void)
1656 {
1657 ;
1658 }
1659 #endif
1660
1661 #ifdef CONFIG_XFRM_STATISTICS
1662 int xfrm_proc_init(struct net *net);
1663 void xfrm_proc_fini(struct net *net);
1664 #endif
1665
1666 int xfrm_sysctl_init(struct net *net);
1667 #ifdef CONFIG_SYSCTL
1668 void xfrm_sysctl_fini(struct net *net);
1669 #else
xfrm_sysctl_fini(struct net * net)1670 static inline void xfrm_sysctl_fini(struct net *net)
1671 {
1672 }
1673 #endif
1674
1675 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1676 struct xfrm_address_filter *filter);
1677 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1678 int (*func)(struct xfrm_state *, int, void*), void *);
1679 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1680 struct xfrm_state *xfrm_state_alloc(struct net *net);
1681 void xfrm_state_free(struct xfrm_state *x);
1682 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1683 const xfrm_address_t *saddr,
1684 const struct flowi *fl,
1685 struct xfrm_tmpl *tmpl,
1686 struct xfrm_policy *pol, int *err,
1687 unsigned short family, u32 if_id);
1688 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1689 xfrm_address_t *daddr,
1690 xfrm_address_t *saddr,
1691 unsigned short family,
1692 u8 mode, u8 proto, u32 reqid);
1693 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1694 unsigned short family);
1695 int xfrm_state_check_expire(struct xfrm_state *x);
1696 void xfrm_state_update_stats(struct net *net);
1697 #ifdef CONFIG_XFRM_OFFLOAD
xfrm_dev_state_update_stats(struct xfrm_state * x)1698 static inline void xfrm_dev_state_update_stats(struct xfrm_state *x)
1699 {
1700 struct xfrm_dev_offload *xdo = &x->xso;
1701 struct net_device *dev = READ_ONCE(xdo->dev);
1702
1703 if (dev && dev->xfrmdev_ops &&
1704 dev->xfrmdev_ops->xdo_dev_state_update_stats)
1705 dev->xfrmdev_ops->xdo_dev_state_update_stats(x);
1706
1707 }
1708 #else
xfrm_dev_state_update_stats(struct xfrm_state * x)1709 static inline void xfrm_dev_state_update_stats(struct xfrm_state *x) {}
1710 #endif
1711 void xfrm_state_insert(struct xfrm_state *x);
1712 int xfrm_state_add(struct xfrm_state *x);
1713 int xfrm_state_update(struct xfrm_state *x);
1714 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1715 const xfrm_address_t *daddr, __be32 spi,
1716 u8 proto, unsigned short family);
1717 struct xfrm_state *xfrm_input_state_lookup(struct net *net, u32 mark,
1718 const xfrm_address_t *daddr,
1719 __be32 spi, u8 proto,
1720 unsigned short family);
1721 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1722 const xfrm_address_t *daddr,
1723 const xfrm_address_t *saddr,
1724 u8 proto,
1725 unsigned short family);
1726 #ifdef CONFIG_XFRM_SUB_POLICY
1727 void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1728 unsigned short family);
1729 void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1730 unsigned short family);
1731 #else
xfrm_tmpl_sort(struct xfrm_tmpl ** d,struct xfrm_tmpl ** s,int n,unsigned short family)1732 static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1733 int n, unsigned short family)
1734 {
1735 }
1736
xfrm_state_sort(struct xfrm_state ** d,struct xfrm_state ** s,int n,unsigned short family)1737 static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1738 int n, unsigned short family)
1739 {
1740 }
1741 #endif
1742
1743 struct xfrmk_sadinfo {
1744 u32 sadhcnt; /* current hash bkts */
1745 u32 sadhmcnt; /* max allowed hash bkts */
1746 u32 sadcnt; /* current running count */
1747 };
1748
1749 struct xfrmk_spdinfo {
1750 u32 incnt;
1751 u32 outcnt;
1752 u32 fwdcnt;
1753 u32 inscnt;
1754 u32 outscnt;
1755 u32 fwdscnt;
1756 u32 spdhcnt;
1757 u32 spdhmcnt;
1758 };
1759
1760 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq, u32 pcpu_num);
1761 int xfrm_state_delete(struct xfrm_state *x);
1762 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1763 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1764 int xfrm_dev_policy_flush(struct net *net, struct net_device *dev,
1765 bool task_valid);
1766 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1767 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1768 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1769 int xfrm_init_replay(struct xfrm_state *x, struct netlink_ext_ack *extack);
1770 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1771 int __xfrm_init_state(struct xfrm_state *x, struct netlink_ext_ack *extack);
1772 int xfrm_init_state(struct xfrm_state *x);
1773 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1774 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1775 int xfrm_trans_queue_net(struct net *net, struct sk_buff *skb,
1776 int (*finish)(struct net *, struct sock *,
1777 struct sk_buff *));
1778 int xfrm_trans_queue(struct sk_buff *skb,
1779 int (*finish)(struct net *, struct sock *,
1780 struct sk_buff *));
1781 int xfrm_output_resume(struct sock *sk, struct sk_buff *skb, int err);
1782 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1783 int xfrm4_tunnel_check_size(struct sk_buff *skb);
1784 #if IS_ENABLED(CONFIG_IPV6)
1785 int xfrm6_tunnel_check_size(struct sk_buff *skb);
1786 #else
xfrm6_tunnel_check_size(struct sk_buff * skb)1787 static inline int xfrm6_tunnel_check_size(struct sk_buff *skb)
1788 {
1789 return -EMSGSIZE;
1790 }
1791 #endif
1792
1793 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1794 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1795 #endif
1796
1797 void xfrm_local_error(struct sk_buff *skb, int mtu);
1798 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1799 int encap_type);
1800 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1801 int xfrm4_rcv(struct sk_buff *skb);
1802
xfrm4_rcv_spi(struct sk_buff * skb,int nexthdr,__be32 spi)1803 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1804 {
1805 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1806 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1807 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1808 return xfrm_input(skb, nexthdr, spi, 0);
1809 }
1810
1811 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1812 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1813 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1814 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1815 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1816 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1817 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1818 struct ip6_tnl *t);
1819 int xfrm6_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1820 int encap_type);
1821 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1822 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1823 int xfrm6_rcv(struct sk_buff *skb);
1824 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1825 xfrm_address_t *saddr, u8 proto);
1826 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1827 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1828 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1829 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1830 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1831 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1832 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1833 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1834
1835 #ifdef CONFIG_XFRM
1836 void xfrm6_local_rxpmtu(struct sk_buff *skb, u32 mtu);
1837 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1838 int xfrm6_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1839 struct sk_buff *xfrm4_gro_udp_encap_rcv(struct sock *sk, struct list_head *head,
1840 struct sk_buff *skb);
1841 struct sk_buff *xfrm6_gro_udp_encap_rcv(struct sock *sk, struct list_head *head,
1842 struct sk_buff *skb);
1843 int xfrm_user_policy(struct sock *sk, int optname, sockptr_t optval,
1844 int optlen);
1845 #else
xfrm_user_policy(struct sock * sk,int optname,sockptr_t optval,int optlen)1846 static inline int xfrm_user_policy(struct sock *sk, int optname,
1847 sockptr_t optval, int optlen)
1848 {
1849 return -ENOPROTOOPT;
1850 }
1851 #endif
1852
1853 struct dst_entry *__xfrm_dst_lookup(int family, const struct xfrm_dst_lookup_params *params);
1854
1855 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1856
1857 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1858 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1859 int (*func)(struct xfrm_policy *, int, int, void*),
1860 void *);
1861 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1862 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1863 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net,
1864 const struct xfrm_mark *mark,
1865 u32 if_id, u8 type, int dir,
1866 struct xfrm_selector *sel,
1867 struct xfrm_sec_ctx *ctx, int delete,
1868 int *err);
1869 struct xfrm_policy *xfrm_policy_byid(struct net *net,
1870 const struct xfrm_mark *mark, u32 if_id,
1871 u8 type, int dir, u32 id, int delete,
1872 int *err);
1873 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1874 void xfrm_policy_hash_rebuild(struct net *net);
1875 u32 xfrm_get_acqseq(void);
1876 int verify_spi_info(u8 proto, u32 min, u32 max, struct netlink_ext_ack *extack);
1877 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi,
1878 struct netlink_ext_ack *extack);
1879 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1880 u8 mode, u32 reqid, u32 if_id, u32 pcpu_num, u8 proto,
1881 const xfrm_address_t *daddr,
1882 const xfrm_address_t *saddr, int create,
1883 unsigned short family);
1884 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1885
1886 #ifdef CONFIG_XFRM_MIGRATE
1887 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1888 const struct xfrm_migrate *m, int num_bundles,
1889 const struct xfrm_kmaddress *k,
1890 const struct xfrm_encap_tmpl *encap);
1891 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net,
1892 u32 if_id);
1893 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1894 struct xfrm_migrate *m,
1895 struct xfrm_encap_tmpl *encap);
1896 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1897 struct xfrm_migrate *m, int num_bundles,
1898 struct xfrm_kmaddress *k, struct net *net,
1899 struct xfrm_encap_tmpl *encap, u32 if_id,
1900 struct netlink_ext_ack *extack);
1901 #endif
1902
1903 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1904 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1905 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1906 xfrm_address_t *addr);
1907
1908 void xfrm_input_init(void);
1909 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1910
1911 void xfrm_probe_algs(void);
1912 int xfrm_count_pfkey_auth_supported(void);
1913 int xfrm_count_pfkey_enc_supported(void);
1914 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1915 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1916 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1917 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1918 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1919 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1920 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1921 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1922 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1923 int probe);
1924
xfrm6_addr_equal(const xfrm_address_t * a,const xfrm_address_t * b)1925 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1926 const xfrm_address_t *b)
1927 {
1928 return ipv6_addr_equal((const struct in6_addr *)a,
1929 (const struct in6_addr *)b);
1930 }
1931
xfrm_addr_equal(const xfrm_address_t * a,const xfrm_address_t * b,sa_family_t family)1932 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1933 const xfrm_address_t *b,
1934 sa_family_t family)
1935 {
1936 switch (family) {
1937 default:
1938 case AF_INET:
1939 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1940 case AF_INET6:
1941 return xfrm6_addr_equal(a, b);
1942 }
1943 }
1944
xfrm_policy_id2dir(u32 index)1945 static inline int xfrm_policy_id2dir(u32 index)
1946 {
1947 return index & 7;
1948 }
1949
1950 #ifdef CONFIG_XFRM
1951 void xfrm_replay_advance(struct xfrm_state *x, __be32 net_seq);
1952 int xfrm_replay_check(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq);
1953 void xfrm_replay_notify(struct xfrm_state *x, int event);
1954 int xfrm_replay_overflow(struct xfrm_state *x, struct sk_buff *skb);
1955 int xfrm_replay_recheck(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq);
1956
xfrm_aevent_is_on(struct net * net)1957 static inline int xfrm_aevent_is_on(struct net *net)
1958 {
1959 struct sock *nlsk;
1960 int ret = 0;
1961
1962 rcu_read_lock();
1963 nlsk = rcu_dereference(net->xfrm.nlsk);
1964 if (nlsk)
1965 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1966 rcu_read_unlock();
1967 return ret;
1968 }
1969
xfrm_acquire_is_on(struct net * net)1970 static inline int xfrm_acquire_is_on(struct net *net)
1971 {
1972 struct sock *nlsk;
1973 int ret = 0;
1974
1975 rcu_read_lock();
1976 nlsk = rcu_dereference(net->xfrm.nlsk);
1977 if (nlsk)
1978 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1979 rcu_read_unlock();
1980
1981 return ret;
1982 }
1983 #endif
1984
aead_len(struct xfrm_algo_aead * alg)1985 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1986 {
1987 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1988 }
1989
xfrm_alg_len(const struct xfrm_algo * alg)1990 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1991 {
1992 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1993 }
1994
xfrm_alg_auth_len(const struct xfrm_algo_auth * alg)1995 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1996 {
1997 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1998 }
1999
xfrm_replay_state_esn_len(struct xfrm_replay_state_esn * replay_esn)2000 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
2001 {
2002 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
2003 }
2004
2005 #ifdef CONFIG_XFRM_MIGRATE
xfrm_replay_clone(struct xfrm_state * x,struct xfrm_state * orig)2006 static inline int xfrm_replay_clone(struct xfrm_state *x,
2007 struct xfrm_state *orig)
2008 {
2009
2010 x->replay_esn = kmemdup(orig->replay_esn,
2011 xfrm_replay_state_esn_len(orig->replay_esn),
2012 GFP_KERNEL);
2013 if (!x->replay_esn)
2014 return -ENOMEM;
2015 x->preplay_esn = kmemdup(orig->preplay_esn,
2016 xfrm_replay_state_esn_len(orig->preplay_esn),
2017 GFP_KERNEL);
2018 if (!x->preplay_esn)
2019 return -ENOMEM;
2020
2021 return 0;
2022 }
2023
xfrm_algo_aead_clone(struct xfrm_algo_aead * orig)2024 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
2025 {
2026 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
2027 }
2028
2029
xfrm_algo_clone(struct xfrm_algo * orig)2030 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
2031 {
2032 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
2033 }
2034
xfrm_algo_auth_clone(struct xfrm_algo_auth * orig)2035 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
2036 {
2037 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
2038 }
2039
xfrm_states_put(struct xfrm_state ** states,int n)2040 static inline void xfrm_states_put(struct xfrm_state **states, int n)
2041 {
2042 int i;
2043 for (i = 0; i < n; i++)
2044 xfrm_state_put(*(states + i));
2045 }
2046
xfrm_states_delete(struct xfrm_state ** states,int n)2047 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
2048 {
2049 int i;
2050 for (i = 0; i < n; i++)
2051 xfrm_state_delete(*(states + i));
2052 }
2053 #endif
2054
2055 void __init xfrm_dev_init(void);
2056
2057 #ifdef CONFIG_XFRM_OFFLOAD
2058 void xfrm_dev_resume(struct sk_buff *skb);
2059 void xfrm_dev_backlog(struct softnet_data *sd);
2060 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
2061 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
2062 struct xfrm_user_offload *xuo,
2063 struct netlink_ext_ack *extack);
2064 int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,
2065 struct xfrm_user_offload *xuo, u8 dir,
2066 struct netlink_ext_ack *extack);
2067 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
2068 void xfrm_dev_state_delete(struct xfrm_state *x);
2069 void xfrm_dev_state_free(struct xfrm_state *x);
2070
xfrm_dev_state_advance_esn(struct xfrm_state * x)2071 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
2072 {
2073 struct xfrm_dev_offload *xso = &x->xso;
2074 struct net_device *dev = READ_ONCE(xso->dev);
2075
2076 if (dev && dev->xfrmdev_ops->xdo_dev_state_advance_esn)
2077 dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
2078 }
2079
xfrm_dst_offload_ok(struct dst_entry * dst)2080 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
2081 {
2082 struct xfrm_state *x = dst->xfrm;
2083 struct xfrm_dst *xdst;
2084
2085 if (!x || !x->type_offload)
2086 return false;
2087
2088 xdst = (struct xfrm_dst *) dst;
2089 if (!x->xso.offload_handle && !xdst->child->xfrm)
2090 return true;
2091 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
2092 !xdst->child->xfrm)
2093 return true;
2094
2095 return false;
2096 }
2097
xfrm_dev_policy_delete(struct xfrm_policy * x)2098 static inline void xfrm_dev_policy_delete(struct xfrm_policy *x)
2099 {
2100 struct xfrm_dev_offload *xdo = &x->xdo;
2101 struct net_device *dev = xdo->dev;
2102
2103 if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_policy_delete)
2104 dev->xfrmdev_ops->xdo_dev_policy_delete(x);
2105 }
2106
xfrm_dev_policy_free(struct xfrm_policy * x)2107 static inline void xfrm_dev_policy_free(struct xfrm_policy *x)
2108 {
2109 struct xfrm_dev_offload *xdo = &x->xdo;
2110 struct net_device *dev = xdo->dev;
2111
2112 if (dev && dev->xfrmdev_ops) {
2113 if (dev->xfrmdev_ops->xdo_dev_policy_free)
2114 dev->xfrmdev_ops->xdo_dev_policy_free(x);
2115 xdo->dev = NULL;
2116 netdev_put(dev, &xdo->dev_tracker);
2117 }
2118 }
2119 #else
xfrm_dev_resume(struct sk_buff * skb)2120 static inline void xfrm_dev_resume(struct sk_buff *skb)
2121 {
2122 }
2123
xfrm_dev_backlog(struct softnet_data * sd)2124 static inline void xfrm_dev_backlog(struct softnet_data *sd)
2125 {
2126 }
2127
validate_xmit_xfrm(struct sk_buff * skb,netdev_features_t features,bool * again)2128 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
2129 {
2130 return skb;
2131 }
2132
xfrm_dev_state_add(struct net * net,struct xfrm_state * x,struct xfrm_user_offload * xuo,struct netlink_ext_ack * extack)2133 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo, struct netlink_ext_ack *extack)
2134 {
2135 return 0;
2136 }
2137
xfrm_dev_state_delete(struct xfrm_state * x)2138 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
2139 {
2140 }
2141
xfrm_dev_state_free(struct xfrm_state * x)2142 static inline void xfrm_dev_state_free(struct xfrm_state *x)
2143 {
2144 }
2145
xfrm_dev_policy_add(struct net * net,struct xfrm_policy * xp,struct xfrm_user_offload * xuo,u8 dir,struct netlink_ext_ack * extack)2146 static inline int xfrm_dev_policy_add(struct net *net, struct xfrm_policy *xp,
2147 struct xfrm_user_offload *xuo, u8 dir,
2148 struct netlink_ext_ack *extack)
2149 {
2150 return 0;
2151 }
2152
xfrm_dev_policy_delete(struct xfrm_policy * x)2153 static inline void xfrm_dev_policy_delete(struct xfrm_policy *x)
2154 {
2155 }
2156
xfrm_dev_policy_free(struct xfrm_policy * x)2157 static inline void xfrm_dev_policy_free(struct xfrm_policy *x)
2158 {
2159 }
2160
xfrm_dev_offload_ok(struct sk_buff * skb,struct xfrm_state * x)2161 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
2162 {
2163 return false;
2164 }
2165
xfrm_dev_state_advance_esn(struct xfrm_state * x)2166 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
2167 {
2168 }
2169
xfrm_dst_offload_ok(struct dst_entry * dst)2170 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
2171 {
2172 return false;
2173 }
2174 #endif
2175
xfrm_mark_get(struct nlattr ** attrs,struct xfrm_mark * m)2176 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
2177 {
2178 if (attrs[XFRMA_MARK])
2179 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
2180 else
2181 m->v = m->m = 0;
2182
2183 return m->v & m->m;
2184 }
2185
xfrm_mark_put(struct sk_buff * skb,const struct xfrm_mark * m)2186 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
2187 {
2188 int ret = 0;
2189
2190 if (m->m | m->v)
2191 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
2192 return ret;
2193 }
2194
xfrm_smark_get(__u32 mark,struct xfrm_state * x)2195 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
2196 {
2197 struct xfrm_mark *m = &x->props.smark;
2198
2199 return (m->v & m->m) | (mark & ~m->m);
2200 }
2201
xfrm_if_id_put(struct sk_buff * skb,__u32 if_id)2202 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
2203 {
2204 int ret = 0;
2205
2206 if (if_id)
2207 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
2208 return ret;
2209 }
2210
xfrm_tunnel_check(struct sk_buff * skb,struct xfrm_state * x,unsigned int family)2211 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
2212 unsigned int family)
2213 {
2214 bool tunnel = false;
2215
2216 switch(family) {
2217 case AF_INET:
2218 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
2219 tunnel = true;
2220 break;
2221 case AF_INET6:
2222 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
2223 tunnel = true;
2224 break;
2225 }
2226 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
2227 return -EINVAL;
2228
2229 return 0;
2230 }
2231
2232 extern const int xfrm_msg_min[XFRM_NR_MSGTYPES];
2233 extern const struct nla_policy xfrma_policy[XFRMA_MAX+1];
2234
2235 struct xfrm_translator {
2236 /* Allocate frag_list and put compat translation there */
2237 int (*alloc_compat)(struct sk_buff *skb, const struct nlmsghdr *src);
2238
2239 /* Allocate nlmsg with 64-bit translaton of received 32-bit message */
2240 struct nlmsghdr *(*rcv_msg_compat)(const struct nlmsghdr *nlh,
2241 int maxtype, const struct nla_policy *policy,
2242 struct netlink_ext_ack *extack);
2243
2244 /* Translate 32-bit user_policy from sockptr */
2245 int (*xlate_user_policy_sockptr)(u8 **pdata32, int optlen);
2246
2247 struct module *owner;
2248 };
2249
2250 #if IS_ENABLED(CONFIG_XFRM_USER_COMPAT)
2251 extern int xfrm_register_translator(struct xfrm_translator *xtr);
2252 extern int xfrm_unregister_translator(struct xfrm_translator *xtr);
2253 extern struct xfrm_translator *xfrm_get_translator(void);
2254 extern void xfrm_put_translator(struct xfrm_translator *xtr);
2255 #else
xfrm_get_translator(void)2256 static inline struct xfrm_translator *xfrm_get_translator(void)
2257 {
2258 return NULL;
2259 }
xfrm_put_translator(struct xfrm_translator * xtr)2260 static inline void xfrm_put_translator(struct xfrm_translator *xtr)
2261 {
2262 }
2263 #endif
2264
2265 #if IS_ENABLED(CONFIG_IPV6)
xfrm6_local_dontfrag(const struct sock * sk)2266 static inline bool xfrm6_local_dontfrag(const struct sock *sk)
2267 {
2268 int proto;
2269
2270 if (!sk || sk->sk_family != AF_INET6)
2271 return false;
2272
2273 proto = sk->sk_protocol;
2274 if (proto == IPPROTO_UDP || proto == IPPROTO_RAW)
2275 return inet6_test_bit(DONTFRAG, sk);
2276
2277 return false;
2278 }
2279 #endif
2280
2281 #if (IS_BUILTIN(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) || \
2282 (IS_MODULE(CONFIG_XFRM_INTERFACE) && IS_ENABLED(CONFIG_DEBUG_INFO_BTF_MODULES))
2283
2284 extern struct metadata_dst __percpu *xfrm_bpf_md_dst;
2285
2286 int register_xfrm_interface_bpf(void);
2287
2288 #else
2289
register_xfrm_interface_bpf(void)2290 static inline int register_xfrm_interface_bpf(void)
2291 {
2292 return 0;
2293 }
2294
2295 #endif
2296
2297 #if IS_ENABLED(CONFIG_DEBUG_INFO_BTF)
2298 int register_xfrm_state_bpf(void);
2299 #else
register_xfrm_state_bpf(void)2300 static inline int register_xfrm_state_bpf(void)
2301 {
2302 return 0;
2303 }
2304 #endif
2305
2306 int xfrm_nat_keepalive_init(unsigned short family);
2307 void xfrm_nat_keepalive_fini(unsigned short family);
2308 int xfrm_nat_keepalive_net_init(struct net *net);
2309 int xfrm_nat_keepalive_net_fini(struct net *net);
2310 void xfrm_nat_keepalive_state_updated(struct xfrm_state *x);
2311
2312 #endif /* _NET_XFRM_H */
2313