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xfrm: remove xfrm_state_put_afinfo
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CommitLineData
1da177e4
LT
1#ifndef _NET_XFRM_H
2#define _NET_XFRM_H
3
aabc9761 4#include <linux/compiler.h>
1da177e4
LT
5#include <linux/xfrm.h>
6#include <linux/spinlock.h>
7#include <linux/list.h>
8#include <linux/skbuff.h>
14c85021 9#include <linux/socket.h>
1da177e4 10#include <linux/pfkeyv2.h>
5794708f 11#include <linux/ipsec.h>
1da177e4 12#include <linux/in6.h>
4a3e2f71 13#include <linux/mutex.h>
ab5f5e8b 14#include <linux/audit.h>
5a0e3ad6 15#include <linux/slab.h>
1da177e4
LT
16
17#include <net/sock.h>
18#include <net/dst.h>
436a0a40 19#include <net/ip.h>
1da177e4
LT
20#include <net/route.h>
21#include <net/ipv6.h>
22#include <net/ip6_fib.h>
fe1a5f03 23#include <net/flow.h>
9e0d57fd
YP
24
25#include <linux/interrupt.h>
26
558f82ef
MN
27#ifdef CONFIG_XFRM_STATISTICS
28#include <net/snmp.h>
29#endif
1da177e4 30
d3d6dd3a
MN
31#define XFRM_PROTO_ESP 50
32#define XFRM_PROTO_AH 51
33#define XFRM_PROTO_COMP 108
34#define XFRM_PROTO_IPIP 4
35#define XFRM_PROTO_IPV6 41
36#define XFRM_PROTO_ROUTING IPPROTO_ROUTING
37#define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
38
fa9921e4 39#define XFRM_ALIGN4(len) (((len) + 3) & ~3)
1da177e4 40#define XFRM_ALIGN8(len) (((len) + 7) & ~7)
b59f45d0
HX
41#define MODULE_ALIAS_XFRM_MODE(family, encap) \
42 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
d3d6dd3a
MN
43#define MODULE_ALIAS_XFRM_TYPE(family, proto) \
44 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
1da177e4 45
558f82ef 46#ifdef CONFIG_XFRM_STATISTICS
59c9940e 47#define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
558f82ef 48#else
59c9940e 49#define XFRM_INC_STATS(net, field) ((void)(net))
558f82ef
MN
50#endif
51
1da177e4
LT
52
53/* Organization of SPD aka "XFRM rules"
54 ------------------------------------
55
56 Basic objects:
57 - policy rule, struct xfrm_policy (=SPD entry)
58 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
59 - instance of a transformer, struct xfrm_state (=SA)
60 - template to clone xfrm_state, struct xfrm_tmpl
61
62 SPD is plain linear list of xfrm_policy rules, ordered by priority.
63 (To be compatible with existing pfkeyv2 implementations,
64 many rules with priority of 0x7fffffff are allowed to exist and
65 such rules are ordered in an unpredictable way, thanks to bsd folks.)
66
67 Lookup is plain linear search until the first match with selector.
68
69 If "action" is "block", then we prohibit the flow, otherwise:
70 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
71 policy entry has list of up to XFRM_MAX_DEPTH transformations,
72 described by templates xfrm_tmpl. Each template is resolved
73 to a complete xfrm_state (see below) and we pack bundle of transformations
74 to a dst_entry returned to requestor.
75
76 dst -. xfrm .-> xfrm_state #1
77 |---. child .-> dst -. xfrm .-> xfrm_state #2
78 |---. child .-> dst -. xfrm .-> xfrm_state #3
79 |---. child .-> NULL
80
81 Bundles are cached at xrfm_policy struct (field ->bundles).
82
83
84 Resolution of xrfm_tmpl
85 -----------------------
86 Template contains:
87 1. ->mode Mode: transport or tunnel
88 2. ->id.proto Protocol: AH/ESP/IPCOMP
89 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
90 Q: allow to resolve security gateway?
91 4. ->id.spi If not zero, static SPI.
92 5. ->saddr Local tunnel endpoint, ignored for transport mode.
93 6. ->algos List of allowed algos. Plain bitmask now.
94 Q: ealgos, aalgos, calgos. What a mess...
95 7. ->share Sharing mode.
96 Q: how to implement private sharing mode? To add struct sock* to
97 flow id?
98
99 Having this template we search through SAD searching for entries
100 with appropriate mode/proto/algo, permitted by selector.
101 If no appropriate entry found, it is requested from key manager.
102
103 PROBLEMS:
104 Q: How to find all the bundles referring to a physical path for
105 PMTU discovery? Seems, dst should contain list of all parents...
106 and enter to infinite locking hierarchy disaster.
107 No! It is easier, we will not search for them, let them find us.
108 We add genid to each dst plus pointer to genid of raw IP route,
109 pmtu disc will update pmtu on raw IP route and increase its genid.
110 dst_check() will see this for top level and trigger resyncing
111 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
112 */
113
12a169e7
HX
114struct xfrm_state_walk {
115 struct list_head all;
116 u8 state;
d3623099
ND
117 u8 dying;
118 u8 proto;
12a169e7 119 u32 seq;
870a2df4 120 struct xfrm_address_filter *filter;
12a169e7
HX
121};
122
1da177e4 123/* Full description of state of transformer. */
fd2c3ef7 124struct xfrm_state {
0c5c9fb5 125 possible_net_t xs_net;
abb81c4f 126 union {
12a169e7 127 struct hlist_node gclist;
abb81c4f
HX
128 struct hlist_node bydst;
129 };
8f126e37
DM
130 struct hlist_node bysrc;
131 struct hlist_node byspi;
1da177e4
LT
132
133 atomic_t refcnt;
134 spinlock_t lock;
135
136 struct xfrm_id id;
137 struct xfrm_selector sel;
bf825f81 138 struct xfrm_mark mark;
35d2856b 139 u32 tfcpad;
1da177e4 140
9d4a706d
DM
141 u32 genid;
142
12a169e7
HX
143 /* Key manager bits */
144 struct xfrm_state_walk km;
1da177e4
LT
145
146 /* Parameters of this state. */
147 struct {
148 u32 reqid;
149 u8 mode;
150 u8 replay_window;
151 u8 aalgo, ealgo, calgo;
152 u8 flags;
153 u16 family;
154 xfrm_address_t saddr;
155 int header_len;
156 int trailer_len;
a947b0a9 157 u32 extra_flags;
1da177e4
LT
158 } props;
159
160 struct xfrm_lifetime_cfg lft;
161
162 /* Data for transformer */
4447bb33 163 struct xfrm_algo_auth *aalg;
1da177e4
LT
164 struct xfrm_algo *ealg;
165 struct xfrm_algo *calg;
1a6509d9 166 struct xfrm_algo_aead *aead;
69b0137f 167 const char *geniv;
1da177e4
LT
168
169 /* Data for encapsulator */
170 struct xfrm_encap_tmpl *encap;
171
060f02a3
NT
172 /* Data for care-of address */
173 xfrm_address_t *coaddr;
174
1da177e4
LT
175 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
176 struct xfrm_state *tunnel;
177
178 /* If a tunnel, number of users + 1 */
179 atomic_t tunnel_users;
180
181 /* State for replay detection */
182 struct xfrm_replay_state replay;
9736acf3 183 struct xfrm_replay_state_esn *replay_esn;
1da177e4 184
f8cd5488
JHS
185 /* Replay detection state at the time we sent the last notification */
186 struct xfrm_replay_state preplay;
9736acf3 187 struct xfrm_replay_state_esn *preplay_esn;
f8cd5488 188
9fdc4883 189 /* The functions for replay detection. */
e45a8a9e 190 const struct xfrm_replay *repl;
9fdc4883 191
2717096a
JHS
192 /* internal flag that only holds state for delayed aevent at the
193 * moment
194 */
195 u32 xflags;
196
f8cd5488
JHS
197 /* Replay detection notification settings */
198 u32 replay_maxage;
199 u32 replay_maxdiff;
200
201 /* Replay detection notification timer */
202 struct timer_list rtimer;
203
1da177e4
LT
204 /* Statistics */
205 struct xfrm_stats stats;
206
207 struct xfrm_lifetime_cur curlft;
9e0d57fd 208 struct tasklet_hrtimer mtimer;
1da177e4 209
e3c0d047
FD
210 /* used to fix curlft->add_time when changing date */
211 long saved_tmo;
212
9afaca05 213 /* Last used time */
d26f3984 214 unsigned long lastused;
9afaca05 215
1da177e4
LT
216 /* Reference to data common to all the instances of this
217 * transformer. */
533cb5b0 218 const struct xfrm_type *type;
13996378 219 struct xfrm_mode *inner_mode;
df9dcb45 220 struct xfrm_mode *inner_mode_iaf;
13996378 221 struct xfrm_mode *outer_mode;
1da177e4 222
df71837d
TJ
223 /* Security context */
224 struct xfrm_sec_ctx *security;
225
1da177e4
LT
226 /* Private data of this transformer, format is opaque,
227 * interpreted by xfrm_type methods. */
228 void *data;
229};
230
673c09be
AD
231static inline struct net *xs_net(struct xfrm_state *x)
232{
233 return read_pnet(&x->xs_net);
234}
235
2717096a
JHS
236/* xflags - make enum if more show up */
237#define XFRM_TIME_DEFER 1
e3c0d047 238#define XFRM_SOFT_EXPIRE 2
2717096a 239
1da177e4
LT
240enum {
241 XFRM_STATE_VOID,
242 XFRM_STATE_ACQ,
243 XFRM_STATE_VALID,
244 XFRM_STATE_ERROR,
245 XFRM_STATE_EXPIRED,
246 XFRM_STATE_DEAD
247};
248
26b15dad 249/* callback structure passed from either netlink or pfkey */
fd2c3ef7 250struct km_event {
bf08867f
HX
251 union {
252 u32 hard;
253 u32 proto;
254 u32 byid;
f8cd5488 255 u32 aevent;
f7b6983f 256 u32 type;
bf08867f
HX
257 } data;
258
26b15dad 259 u32 seq;
15e47304 260 u32 portid;
26b15dad 261 u32 event;
7067802e 262 struct net *net;
26b15dad
JHS
263};
264
9fdc4883
SK
265struct xfrm_replay {
266 void (*advance)(struct xfrm_state *x, __be32 net_seq);
267 int (*check)(struct xfrm_state *x,
268 struct sk_buff *skb,
269 __be32 net_seq);
3b59df46
SK
270 int (*recheck)(struct xfrm_state *x,
271 struct sk_buff *skb,
272 __be32 net_seq);
9fdc4883
SK
273 void (*notify)(struct xfrm_state *x, int event);
274 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
275};
276
25ee3286 277struct net_device;
1da177e4
LT
278struct xfrm_type;
279struct xfrm_dst;
280struct xfrm_policy_afinfo {
281 unsigned short family;
1da177e4 282 struct dst_ops *dst_ops;
ddcfd796 283 void (*garbage_collect)(struct net *net);
42a7b32b
DA
284 struct dst_entry *(*dst_lookup)(struct net *net,
285 int tos, int oif,
5e6b930f
DM
286 const xfrm_address_t *saddr,
287 const xfrm_address_t *daddr);
42a7b32b
DA
288 int (*get_saddr)(struct net *net, int oif,
289 xfrm_address_t *saddr,
290 xfrm_address_t *daddr);
1da177e4 291 void (*decode_session)(struct sk_buff *skb,
d5422efe
HX
292 struct flowi *fl,
293 int reverse);
05d84025 294 int (*get_tos)(const struct flowi *fl);
a1b05140
MN
295 int (*init_path)(struct xfrm_dst *path,
296 struct dst_entry *dst,
297 int nfheader_len);
25ee3286 298 int (*fill_dst)(struct xfrm_dst *xdst,
87c1e12b 299 struct net_device *dev,
0c7b3eef 300 const struct flowi *fl);
2774c131 301 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
1da177e4
LT
302};
303
d511337a
JP
304int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo);
305int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo);
306void km_policy_notify(struct xfrm_policy *xp, int dir,
307 const struct km_event *c);
308void km_state_notify(struct xfrm_state *x, const struct km_event *c);
1da177e4
LT
309
310struct xfrm_tmpl;
d511337a
JP
311int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
312 struct xfrm_policy *pol);
313void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
314int __xfrm_state_delete(struct xfrm_state *x);
53bc6b4d 315
1da177e4 316struct xfrm_state_afinfo {
17c2a42a 317 unsigned int family;
36cf9acf 318 unsigned int proto;
8e3d716c 319 __be16 eth_proto;
17c2a42a 320 struct module *owner;
533cb5b0 321 const struct xfrm_type *type_map[IPPROTO_MAX];
aa5d62cc 322 struct xfrm_mode *mode_map[XFRM_MODE_MAX];
d094cd83 323 int (*init_flags)(struct xfrm_state *x);
73e5ebb2
DM
324 void (*init_tempsel)(struct xfrm_selector *sel,
325 const struct flowi *fl);
19bd6244
DM
326 void (*init_temprop)(struct xfrm_state *x,
327 const struct xfrm_tmpl *tmpl,
328 const xfrm_address_t *daddr,
329 const xfrm_address_t *saddr);
41a49cc3
MN
330 int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
331 int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
ede2059d 332 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
7026b1dd 333 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
227620e2
HX
334 int (*extract_input)(struct xfrm_state *x,
335 struct sk_buff *skb);
36cf9acf
HX
336 int (*extract_output)(struct xfrm_state *x,
337 struct sk_buff *skb);
716062fd
HX
338 int (*transport_finish)(struct sk_buff *skb,
339 int async);
628e341f 340 void (*local_error)(struct sk_buff *skb, u32 mtu);
1da177e4
LT
341};
342
d511337a
JP
343int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
344int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
345struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
1da177e4 346
2f32b51b
SK
347struct xfrm_input_afinfo {
348 unsigned int family;
349 struct module *owner;
350 int (*callback)(struct sk_buff *skb, u8 protocol,
351 int err);
352};
353
354int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo);
355int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo);
356
d511337a 357void xfrm_state_delete_tunnel(struct xfrm_state *x);
1da177e4 358
fd2c3ef7 359struct xfrm_type {
1da177e4
LT
360 char *description;
361 struct module *owner;
a6337463 362 u8 proto;
363 u8 flags;
1b5c2299 364#define XFRM_TYPE_NON_FRAGMENT 1
436a0a40 365#define XFRM_TYPE_REPLAY_PROT 2
f04e7e8d
HX
366#define XFRM_TYPE_LOCAL_COADDR 4
367#define XFRM_TYPE_REMOTE_COADDR 8
1da177e4 368
72cb6962 369 int (*init_state)(struct xfrm_state *x);
1da177e4 370 void (*destructor)(struct xfrm_state *);
e695633e 371 int (*input)(struct xfrm_state *, struct sk_buff *skb);
1da177e4 372 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
8f029de2
DM
373 int (*reject)(struct xfrm_state *, struct sk_buff *,
374 const struct flowi *);
aee5adb4 375 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
1da177e4 376 /* Estimate maximal size of result of transformation of a dgram */
c5c25238 377 u32 (*get_mtu)(struct xfrm_state *, int size);
1da177e4
LT
378};
379
d511337a
JP
380int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
381int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
1da177e4 382
b59f45d0 383struct xfrm_mode {
227620e2
HX
384 /*
385 * Remove encapsulation header.
386 *
387 * The IP header will be moved over the top of the encapsulation
388 * header.
389 *
390 * On entry, the transport header shall point to where the IP header
391 * should be and the network header shall be set to where the IP
392 * header currently is. skb->data shall point to the start of the
393 * payload.
394 */
395 int (*input2)(struct xfrm_state *x, struct sk_buff *skb);
396
397 /*
398 * This is the actual input entry point.
399 *
400 * For transport mode and equivalent this would be identical to
401 * input2 (which does not need to be set). While tunnel mode
402 * and equivalent would set this to the tunnel encapsulation function
403 * xfrm4_prepare_input that would in turn call input2.
404 */
b59f45d0 405 int (*input)(struct xfrm_state *x, struct sk_buff *skb);
37fedd3a
HX
406
407 /*
408 * Add encapsulation header.
409 *
410 * On exit, the transport header will be set to the start of the
411 * encapsulation header to be filled in by x->type->output and
412 * the mac header will be set to the nextheader (protocol for
413 * IPv4) field of the extension header directly preceding the
414 * encapsulation header, or in its absence, that of the top IP
415 * header. The value of the network header will always point
416 * to the top IP header while skb->data will point to the payload.
417 */
36cf9acf
HX
418 int (*output2)(struct xfrm_state *x,struct sk_buff *skb);
419
420 /*
421 * This is the actual output entry point.
422 *
423 * For transport mode and equivalent this would be identical to
424 * output2 (which does not need to be set). While tunnel mode
425 * and equivalent would set this to a tunnel encapsulation function
426 * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn
427 * call output2.
428 */
429 int (*output)(struct xfrm_state *x, struct sk_buff *skb);
b59f45d0 430
17c2a42a 431 struct xfrm_state_afinfo *afinfo;
b59f45d0
HX
432 struct module *owner;
433 unsigned int encap;
1bfcb10f
HX
434 int flags;
435};
436
437/* Flags for xfrm_mode. */
438enum {
439 XFRM_MODE_FLAG_TUNNEL = 1,
b59f45d0
HX
440};
441
d511337a
JP
442int xfrm_register_mode(struct xfrm_mode *mode, int family);
443int xfrm_unregister_mode(struct xfrm_mode *mode, int family);
b59f45d0 444
df9dcb45
KM
445static inline int xfrm_af2proto(unsigned int family)
446{
447 switch(family) {
448 case AF_INET:
449 return IPPROTO_IPIP;
450 case AF_INET6:
451 return IPPROTO_IPV6;
452 default:
453 return 0;
454 }
455}
456
457static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
458{
459 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
460 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
461 return x->inner_mode;
462 else
463 return x->inner_mode_iaf;
464}
465
fd2c3ef7 466struct xfrm_tmpl {
1da177e4
LT
467/* id in template is interpreted as:
468 * daddr - destination of tunnel, may be zero for transport mode.
469 * spi - zero to acquire spi. Not zero if spi is static, then
470 * daddr must be fixed too.
471 * proto - AH/ESP/IPCOMP
472 */
473 struct xfrm_id id;
474
475/* Source address of tunnel. Ignored, if it is not a tunnel. */
476 xfrm_address_t saddr;
477
76b3f055
MK
478 unsigned short encap_family;
479
a6337463 480 u32 reqid;
1da177e4 481
7e49e6de 482/* Mode: transport, tunnel etc. */
a6337463 483 u8 mode;
1da177e4
LT
484
485/* Sharing mode: unique, this session only, this user only etc. */
a6337463 486 u8 share;
1da177e4
LT
487
488/* May skip this transfomration if no SA is found */
a6337463 489 u8 optional;
1da177e4 490
c5d18e98 491/* Skip aalgos/ealgos/calgos checks. */
a6337463 492 u8 allalgs;
c5d18e98 493
1da177e4 494/* Bit mask of algos allowed for acquisition */
a6337463 495 u32 aalgos;
496 u32 ealgos;
497 u32 calgos;
1da177e4
LT
498};
499
622dc828 500#define XFRM_MAX_DEPTH 6
1da177e4 501
12a169e7
HX
502struct xfrm_policy_walk_entry {
503 struct list_head all;
504 u8 dead;
505};
506
507struct xfrm_policy_walk {
508 struct xfrm_policy_walk_entry walk;
509 u8 type;
510 u32 seq;
511};
512
a0073fe1
SK
513struct xfrm_policy_queue {
514 struct sk_buff_head hold_queue;
515 struct timer_list hold_timer;
516 unsigned long timeout;
517};
518
fd2c3ef7 519struct xfrm_policy {
0c5c9fb5 520 possible_net_t xp_net;
2518c7c2
DM
521 struct hlist_node bydst;
522 struct hlist_node byidx;
1da177e4
LT
523
524 /* This lock only affects elements except for entry. */
525 rwlock_t lock;
526 atomic_t refcnt;
527 struct timer_list timer;
528
fe1a5f03 529 struct flow_cache_object flo;
80c802f3 530 atomic_t genid;
1da177e4
LT
531 u32 priority;
532 u32 index;
bf825f81 533 struct xfrm_mark mark;
1da177e4
LT
534 struct xfrm_selector selector;
535 struct xfrm_lifetime_cfg lft;
536 struct xfrm_lifetime_cur curlft;
12a169e7 537 struct xfrm_policy_walk_entry walk;
a0073fe1 538 struct xfrm_policy_queue polq;
46ca5f5d
ACM
539 u8 type;
540 u8 action;
541 u8 flags;
46ca5f5d 542 u8 xfrm_nr;
12a169e7 543 u16 family;
df71837d 544 struct xfrm_sec_ctx *security;
1da177e4 545 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
56f04730 546 struct rcu_head rcu;
1da177e4
LT
547};
548
63eb23f5 549static inline struct net *xp_net(const struct xfrm_policy *xp)
0331b1f3
AD
550{
551 return read_pnet(&xp->xp_net);
552}
553
13c1d189
AE
554struct xfrm_kmaddress {
555 xfrm_address_t local;
556 xfrm_address_t remote;
557 u32 reserved;
558 u16 family;
559};
560
80c9abaa
SS
561struct xfrm_migrate {
562 xfrm_address_t old_daddr;
563 xfrm_address_t old_saddr;
564 xfrm_address_t new_daddr;
565 xfrm_address_t new_saddr;
566 u8 proto;
567 u8 mode;
568 u16 reserved;
569 u32 reqid;
570 u16 old_family;
571 u16 new_family;
572};
573
f8cd5488 574#define XFRM_KM_TIMEOUT 30
f8cd5488
JHS
575/* what happened */
576#define XFRM_REPLAY_UPDATE XFRM_AE_CR
577#define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
578
579/* default aevent timeout in units of 100ms */
580#define XFRM_AE_ETIME 10
581/* Async Event timer multiplier */
582#define XFRM_AE_ETH_M 10
583/* default seq threshold size */
584#define XFRM_AE_SEQT_SIZE 2
1da177e4 585
fd2c3ef7 586struct xfrm_mgr {
1da177e4
LT
587 struct list_head list;
588 char *id;
214e005b 589 int (*notify)(struct xfrm_state *x, const struct km_event *c);
65e0736b 590 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
cb969f07 591 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
5d36b180 592 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
214e005b 593 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
db983c11 594 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
183cad12
DM
595 int (*migrate)(const struct xfrm_selector *sel,
596 u8 dir, u8 type,
597 const struct xfrm_migrate *m,
598 int num_bundles,
599 const struct xfrm_kmaddress *k);
0f24558e 600 bool (*is_alive)(const struct km_event *c);
1da177e4
LT
601};
602
d511337a
JP
603int xfrm_register_km(struct xfrm_mgr *km);
604int xfrm_unregister_km(struct xfrm_mgr *km);
1da177e4 605
70be6c91
SK
606struct xfrm_tunnel_skb_cb {
607 union {
608 struct inet_skb_parm h4;
609 struct inet6_skb_parm h6;
610 } header;
611
612 union {
613 struct ip_tunnel *ip4;
614 struct ip6_tnl *ip6;
615 } tunnel;
616};
617
618#define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
619
436a0a40
HX
620/*
621 * This structure is used for the duration where packets are being
622 * transformed by IPsec. As soon as the packet leaves IPsec the
623 * area beyond the generic IP part may be overwritten.
624 */
625struct xfrm_skb_cb {
70be6c91 626 struct xfrm_tunnel_skb_cb header;
436a0a40
HX
627
628 /* Sequence number for replay protection. */
b318e0e4 629 union {
1ce3644a
SK
630 struct {
631 __u32 low;
632 __u32 hi;
633 } output;
634 struct {
635 __be32 low;
636 __be32 hi;
637 } input;
b318e0e4 638 } seq;
436a0a40
HX
639};
640
641#define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
642
36cf9acf
HX
643/*
644 * This structure is used by the afinfo prepare_input/prepare_output functions
645 * to transmit header information to the mode input/output functions.
646 */
647struct xfrm_mode_skb_cb {
70be6c91 648 struct xfrm_tunnel_skb_cb header;
36cf9acf
HX
649
650 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
651 __be16 id;
652 __be16 frag_off;
653
732c8bd5
HX
654 /* IP header length (excluding options or extension headers). */
655 u8 ihl;
656
36cf9acf
HX
657 /* TOS for IPv4, class for IPv6. */
658 u8 tos;
659
660 /* TTL for IPv4, hop limitfor IPv6. */
661 u8 ttl;
662
663 /* Protocol for IPv4, NH for IPv6. */
664 u8 protocol;
665
732c8bd5
HX
666 /* Option length for IPv4, zero for IPv6. */
667 u8 optlen;
668
36cf9acf
HX
669 /* Used by IPv6 only, zero for IPv4. */
670 u8 flow_lbl[3];
671};
672
673#define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
674
716062fd
HX
675/*
676 * This structure is used by the input processing to locate the SPI and
677 * related information.
678 */
679struct xfrm_spi_skb_cb {
70be6c91 680 struct xfrm_tunnel_skb_cb header;
716062fd 681
716062fd 682 unsigned int daddroff;
2fcb45b6 683 unsigned int family;
716062fd
HX
684};
685
686#define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
687
c9204d9c 688#ifdef CONFIG_AUDITSYSCALL
afeb14b4 689static inline struct audit_buffer *xfrm_audit_start(const char *op)
ab5f5e8b
JL
690{
691 struct audit_buffer *audit_buf = NULL;
ab5f5e8b 692
afeb14b4
PM
693 if (audit_enabled == 0)
694 return NULL;
ab5f5e8b 695 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC,
afeb14b4 696 AUDIT_MAC_IPSEC_EVENT);
ab5f5e8b
JL
697 if (audit_buf == NULL)
698 return NULL;
afeb14b4
PM
699 audit_log_format(audit_buf, "op=%s", op);
700 return audit_buf;
701}
ab5f5e8b 702
2e71029e 703static inline void xfrm_audit_helper_usrinfo(bool task_valid,
afeb14b4
PM
704 struct audit_buffer *audit_buf)
705{
2e71029e
TH
706 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
707 audit_get_loginuid(current) :
708 INVALID_UID);
709 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
710 (unsigned int) -1;
711
712 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
f1370cc4 713 audit_log_task_context(audit_buf);
ab5f5e8b
JL
714}
715
2e71029e
TH
716void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
717void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
718 bool task_valid);
719void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
720void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
d511337a
JP
721void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
722 struct sk_buff *skb);
723void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
724 __be32 net_seq);
725void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
726void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
727 __be32 net_seq);
728void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
729 u8 proto);
c9204d9c 730#else
41fef0ee
MS
731
732static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
2e71029e 733 bool task_valid)
41fef0ee
MS
734{
735}
736
737static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
2e71029e 738 bool task_valid)
41fef0ee
MS
739{
740}
741
742static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
2e71029e 743 bool task_valid)
41fef0ee
MS
744{
745}
746
747static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
2e71029e 748 bool task_valid)
41fef0ee
MS
749{
750}
751
752static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
753 struct sk_buff *skb)
754{
755}
756
9fdc4883
SK
757static inline void xfrm_audit_state_replay(struct xfrm_state *x,
758 struct sk_buff *skb, __be32 net_seq)
759{
760}
761
41fef0ee
MS
762static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
763 u16 family)
764{
765}
766
767static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
768 __be32 net_spi, __be32 net_seq)
769{
770}
771
772static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
773 struct sk_buff *skb, u8 proto)
774{
775}
c9204d9c 776#endif /* CONFIG_AUDITSYSCALL */
161a09e7 777
1da177e4
LT
778static inline void xfrm_pol_hold(struct xfrm_policy *policy)
779{
780 if (likely(policy != NULL))
781 atomic_inc(&policy->refcnt);
782}
783
d511337a 784void xfrm_policy_destroy(struct xfrm_policy *policy);
1da177e4
LT
785
786static inline void xfrm_pol_put(struct xfrm_policy *policy)
787{
788 if (atomic_dec_and_test(&policy->refcnt))
64c31b3f 789 xfrm_policy_destroy(policy);
1da177e4
LT
790}
791
4e81bb83
MN
792static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
793{
794 int i;
795 for (i = npols - 1; i >= 0; --i)
796 xfrm_pol_put(pols[i]);
797}
4e81bb83 798
d511337a 799void __xfrm_state_destroy(struct xfrm_state *);
1da177e4 800
21380b81
HX
801static inline void __xfrm_state_put(struct xfrm_state *x)
802{
803 atomic_dec(&x->refcnt);
804}
805
1da177e4
LT
806static inline void xfrm_state_put(struct xfrm_state *x)
807{
808 if (atomic_dec_and_test(&x->refcnt))
809 __xfrm_state_destroy(x);
810}
811
812static inline void xfrm_state_hold(struct xfrm_state *x)
813{
814 atomic_inc(&x->refcnt);
815}
816
1744a8fe
DM
817static inline bool addr_match(const void *token1, const void *token2,
818 int prefixlen)
1da177e4 819{
1744a8fe
DM
820 const __be32 *a1 = token1;
821 const __be32 *a2 = token2;
1da177e4
LT
822 int pdw;
823 int pbi;
824
a6337463 825 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
1da177e4
LT
826 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
827
828 if (pdw)
829 if (memcmp(a1, a2, pdw << 2))
1744a8fe 830 return false;
1da177e4
LT
831
832 if (pbi) {
5f19343f 833 __be32 mask;
1da177e4
LT
834
835 mask = htonl((0xffffffff) << (32 - pbi));
836
837 if ((a1[pdw] ^ a2[pdw]) & mask)
1744a8fe 838 return false;
1da177e4
LT
839 }
840
1744a8fe 841 return true;
1da177e4
LT
842}
843
26bff940
AD
844static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
845{
846 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
847 if (prefixlen == 0)
848 return true;
849 return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
850}
851
1da177e4 852static __inline__
6281dcc9 853__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
1da177e4 854{
f9d07e41 855 __be16 port;
1d28f42c 856 switch(fl->flowi_proto) {
1da177e4
LT
857 case IPPROTO_TCP:
858 case IPPROTO_UDP:
ba4e58ec 859 case IPPROTO_UDPLITE:
1da177e4 860 case IPPROTO_SCTP:
6281dcc9 861 port = uli->ports.sport;
1da177e4
LT
862 break;
863 case IPPROTO_ICMP:
864 case IPPROTO_ICMPV6:
6281dcc9 865 port = htons(uli->icmpt.type);
1da177e4 866 break;
2ce4272a 867 case IPPROTO_MH:
6281dcc9 868 port = htons(uli->mht.type);
2ce4272a 869 break;
cc9ff19d 870 case IPPROTO_GRE:
6281dcc9 871 port = htons(ntohl(uli->gre_key) >> 16);
cc9ff19d 872 break;
1da177e4
LT
873 default:
874 port = 0; /*XXX*/
875 }
876 return port;
877}
878
879static __inline__
6281dcc9 880__be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
1da177e4 881{
f9d07e41 882 __be16 port;
1d28f42c 883 switch(fl->flowi_proto) {
1da177e4
LT
884 case IPPROTO_TCP:
885 case IPPROTO_UDP:
ba4e58ec 886 case IPPROTO_UDPLITE:
1da177e4 887 case IPPROTO_SCTP:
6281dcc9 888 port = uli->ports.dport;
1da177e4
LT
889 break;
890 case IPPROTO_ICMP:
891 case IPPROTO_ICMPV6:
6281dcc9 892 port = htons(uli->icmpt.code);
1da177e4 893 break;
cc9ff19d 894 case IPPROTO_GRE:
6281dcc9 895 port = htons(ntohl(uli->gre_key) & 0xffff);
cc9ff19d 896 break;
1da177e4
LT
897 default:
898 port = 0; /*XXX*/
899 }
900 return port;
901}
902
d511337a
JP
903bool xfrm_selector_match(const struct xfrm_selector *sel,
904 const struct flowi *fl, unsigned short family);
1da177e4 905
df71837d
TJ
906#ifdef CONFIG_SECURITY_NETWORK_XFRM
907/* If neither has a context --> match
908 * Otherwise, both must have a context and the sids, doi, alg must match
909 */
bc9b35ad 910static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
df71837d
TJ
911{
912 return ((!s1 && !s2) ||
913 (s1 && s2 &&
914 (s1->ctx_sid == s2->ctx_sid) &&
915 (s1->ctx_doi == s2->ctx_doi) &&
916 (s1->ctx_alg == s2->ctx_alg)));
917}
918#else
bc9b35ad 919static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
df71837d 920{
bc9b35ad 921 return true;
df71837d
TJ
922}
923#endif
924
1da177e4
LT
925/* A struct encoding bundle of transformations to apply to some set of flow.
926 *
927 * dst->child points to the next element of bundle.
928 * dst->xfrm points to an instanse of transformer.
929 *
930 * Due to unfortunate limitations of current routing cache, which we
931 * have no time to fix, it mirrors struct rtable and bound to the same
932 * routing key, including saddr,daddr. However, we can have many of
933 * bundles differing by session id. All the bundles grow from a parent
934 * policy rule.
935 */
fd2c3ef7 936struct xfrm_dst {
1da177e4 937 union {
1da177e4
LT
938 struct dst_entry dst;
939 struct rtable rt;
940 struct rt6_info rt6;
941 } u;
942 struct dst_entry *route;
80c802f3
TT
943 struct flow_cache_object flo;
944 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
945 int num_pols, num_xfrms;
157bfc25
MN
946#ifdef CONFIG_XFRM_SUB_POLICY
947 struct flowi *origin;
948 struct xfrm_selector *partner;
949#endif
80c802f3
TT
950 u32 xfrm_genid;
951 u32 policy_genid;
1da177e4
LT
952 u32 route_mtu_cached;
953 u32 child_mtu_cached;
92d63dec
HY
954 u32 route_cookie;
955 u32 path_cookie;
1da177e4
LT
956};
957
def8b4fa 958#ifdef CONFIG_XFRM
aabc9761
HX
959static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
960{
80c802f3 961 xfrm_pols_put(xdst->pols, xdst->num_pols);
aabc9761
HX
962 dst_release(xdst->route);
963 if (likely(xdst->u.dst.xfrm))
964 xfrm_state_put(xdst->u.dst.xfrm);
157bfc25
MN
965#ifdef CONFIG_XFRM_SUB_POLICY
966 kfree(xdst->origin);
967 xdst->origin = NULL;
968 kfree(xdst->partner);
969 xdst->partner = NULL;
970#endif
aabc9761 971}
def8b4fa 972#endif
aabc9761 973
d511337a 974void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
aabc9761 975
fd2c3ef7 976struct sec_path {
1da177e4
LT
977 atomic_t refcnt;
978 int len;
dbe5b4aa 979 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1da177e4
LT
980};
981
990078af
MS
982static inline int secpath_exists(struct sk_buff *skb)
983{
984#ifdef CONFIG_XFRM
985 return skb->sp != NULL;
986#else
987 return 0;
988#endif
989}
990
1da177e4
LT
991static inline struct sec_path *
992secpath_get(struct sec_path *sp)
993{
994 if (sp)
995 atomic_inc(&sp->refcnt);
996 return sp;
997}
998
d511337a 999void __secpath_destroy(struct sec_path *sp);
1da177e4
LT
1000
1001static inline void
1002secpath_put(struct sec_path *sp)
1003{
1004 if (sp && atomic_dec_and_test(&sp->refcnt))
1005 __secpath_destroy(sp);
1006}
1007
d511337a 1008struct sec_path *secpath_dup(struct sec_path *src);
1da177e4
LT
1009
1010static inline void
1011secpath_reset(struct sk_buff *skb)
1012{
1013#ifdef CONFIG_XFRM
1014 secpath_put(skb->sp);
1015 skb->sp = NULL;
1016#endif
1017}
1018
a1e59abf 1019static inline int
6cc32961 1020xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
a1e59abf
PM
1021{
1022 switch (family) {
1023 case AF_INET:
1024 return addr->a4 == 0;
1025 case AF_INET6:
15e318bd 1026 return ipv6_addr_any(&addr->in6);
a1e59abf
PM
1027 }
1028 return 0;
1029}
1030
1da177e4 1031static inline int
21eddb5c 1032__xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1da177e4
LT
1033{
1034 return (tmpl->saddr.a4 &&
1035 tmpl->saddr.a4 != x->props.saddr.a4);
1036}
1037
1038static inline int
21eddb5c 1039__xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1da177e4
LT
1040{
1041 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
ff88b30c 1042 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1da177e4
LT
1043}
1044
1045static inline int
21eddb5c 1046xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1da177e4
LT
1047{
1048 switch (family) {
1049 case AF_INET:
1050 return __xfrm4_state_addr_cmp(tmpl, x);
1051 case AF_INET6:
1052 return __xfrm6_state_addr_cmp(tmpl, x);
1053 }
1054 return !0;
1055}
1056
1057#ifdef CONFIG_XFRM
d511337a
JP
1058int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1059 unsigned short family);
1da177e4 1060
d5422efe
HX
1061static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1062 struct sk_buff *skb,
1063 unsigned int family, int reverse)
1da177e4 1064{
f6e1e25d 1065 struct net *net = dev_net(skb->dev);
d5422efe
HX
1066 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1067
1da177e4 1068 if (sk && sk->sk_policy[XFRM_POLICY_IN])
d5422efe 1069 return __xfrm_policy_check(sk, ndir, skb, family);
4e81bb83 1070
f6e1e25d 1071 return (!net->xfrm.policy_count[dir] && !skb->sp) ||
adf30907 1072 (skb_dst(skb)->flags & DST_NOPOLICY) ||
d5422efe
HX
1073 __xfrm_policy_check(sk, ndir, skb, family);
1074}
1075
1076static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1077{
1078 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1da177e4
LT
1079}
1080
1081static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1082{
1083 return xfrm_policy_check(sk, dir, skb, AF_INET);
1084}
1085
1086static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1087{
1088 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1089}
1090
d5422efe
HX
1091static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1092 struct sk_buff *skb)
1093{
1094 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1095}
1096
1097static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1098 struct sk_buff *skb)
1099{
1100 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1101}
1102
d511337a
JP
1103int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1104 unsigned int family, int reverse);
d5422efe
HX
1105
1106static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1107 unsigned int family)
1108{
1109 return __xfrm_decode_session(skb, fl, family, 0);
1110}
1111
1112static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1113 struct flowi *fl,
1114 unsigned int family)
1115{
1116 return __xfrm_decode_session(skb, fl, family, 1);
1117}
1118
d511337a 1119int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1da177e4
LT
1120
1121static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1122{
99a66657
AD
1123 struct net *net = dev_net(skb->dev);
1124
1125 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
adf30907 1126 (skb_dst(skb)->flags & DST_NOXFRM) ||
1da177e4
LT
1127 __xfrm_route_forward(skb, family);
1128}
1129
1130static inline int xfrm4_route_forward(struct sk_buff *skb)
1131{
1132 return xfrm_route_forward(skb, AF_INET);
1133}
1134
1135static inline int xfrm6_route_forward(struct sk_buff *skb)
1136{
1137 return xfrm_route_forward(skb, AF_INET6);
1138}
1139
d188ba86 1140int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1da177e4 1141
d188ba86 1142static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1da177e4 1143{
d188ba86
ED
1144 sk->sk_policy[0] = NULL;
1145 sk->sk_policy[1] = NULL;
1146 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1147 return __xfrm_sk_clone_policy(sk, osk);
1da177e4
LT
1148 return 0;
1149}
1150
d511337a 1151int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1da177e4
LT
1152
1153static inline void xfrm_sk_free_policy(struct sock *sk)
1154{
d188ba86
ED
1155 struct xfrm_policy *pol;
1156
1157 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1158 if (unlikely(pol != NULL)) {
1159 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1da177e4
LT
1160 sk->sk_policy[0] = NULL;
1161 }
d188ba86
ED
1162 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1163 if (unlikely(pol != NULL)) {
1164 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1da177e4
LT
1165 sk->sk_policy[1] = NULL;
1166 }
1167}
1168
d511337a 1169void xfrm_garbage_collect(struct net *net);
e4c17216 1170
1da177e4
LT
1171#else
1172
1173static inline void xfrm_sk_free_policy(struct sock *sk) {}
d188ba86 1174static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1da177e4
LT
1175static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1176static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1177static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1178{
1179 return 1;
1180}
1181static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1182{
1183 return 1;
1184}
1185static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1186{
1187 return 1;
1188}
d5422efe
HX
1189static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1190 struct flowi *fl,
1191 unsigned int family)
1192{
1193 return -ENOSYS;
1194}
1195static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1196 struct sk_buff *skb)
1197{
1198 return 1;
1199}
1200static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1201 struct sk_buff *skb)
1202{
1203 return 1;
1204}
e4c17216
PM
1205static inline void xfrm_garbage_collect(struct net *net)
1206{
1207}
1da177e4
LT
1208#endif
1209
1210static __inline__
e8a4e377 1211xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1da177e4
LT
1212{
1213 switch (family){
1214 case AF_INET:
7e1dc7b6 1215 return (xfrm_address_t *)&fl->u.ip4.daddr;
1da177e4 1216 case AF_INET6:
7e1dc7b6 1217 return (xfrm_address_t *)&fl->u.ip6.daddr;
1da177e4
LT
1218 }
1219 return NULL;
1220}
1221
1222static __inline__
e8a4e377 1223xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1da177e4
LT
1224{
1225 switch (family){
1226 case AF_INET:
7e1dc7b6 1227 return (xfrm_address_t *)&fl->u.ip4.saddr;
1da177e4 1228 case AF_INET6:
7e1dc7b6 1229 return (xfrm_address_t *)&fl->u.ip6.saddr;
1da177e4
LT
1230 }
1231 return NULL;
1232}
1233
9bb182a7 1234static __inline__
e8a4e377 1235void xfrm_flowi_addr_get(const struct flowi *fl,
9bb182a7
YH
1236 xfrm_address_t *saddr, xfrm_address_t *daddr,
1237 unsigned short family)
1238{
1239 switch(family) {
1240 case AF_INET:
7e1dc7b6
DM
1241 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1242 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
9bb182a7
YH
1243 break;
1244 case AF_INET6:
15e318bd
JB
1245 saddr->in6 = fl->u.ip6.saddr;
1246 daddr->in6 = fl->u.ip6.daddr;
9bb182a7
YH
1247 break;
1248 }
1249}
1250
1da177e4 1251static __inline__ int
f8848067
DM
1252__xfrm4_state_addr_check(const struct xfrm_state *x,
1253 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1da177e4
LT
1254{
1255 if (daddr->a4 == x->id.daddr.a4 &&
1256 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1257 return 1;
1258 return 0;
1259}
1260
1261static __inline__ int
f8848067
DM
1262__xfrm6_state_addr_check(const struct xfrm_state *x,
1263 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1da177e4 1264{
ff88b30c
YH
1265 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1266 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1da177e4
LT
1267 ipv6_addr_any((struct in6_addr *)saddr) ||
1268 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1269 return 1;
1270 return 0;
1271}
1272
1273static __inline__ int
f8848067
DM
1274xfrm_state_addr_check(const struct xfrm_state *x,
1275 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1da177e4
LT
1276 unsigned short family)
1277{
1278 switch (family) {
1279 case AF_INET:
1280 return __xfrm4_state_addr_check(x, daddr, saddr);
1281 case AF_INET6:
1282 return __xfrm6_state_addr_check(x, daddr, saddr);
1283 }
1284 return 0;
1285}
1286
e53820de 1287static __inline__ int
f8848067 1288xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
e53820de
MN
1289 unsigned short family)
1290{
1291 switch (family) {
1292 case AF_INET:
1293 return __xfrm4_state_addr_check(x,
7e1dc7b6
DM
1294 (const xfrm_address_t *)&fl->u.ip4.daddr,
1295 (const xfrm_address_t *)&fl->u.ip4.saddr);
e53820de
MN
1296 case AF_INET6:
1297 return __xfrm6_state_addr_check(x,
7e1dc7b6
DM
1298 (const xfrm_address_t *)&fl->u.ip6.daddr,
1299 (const xfrm_address_t *)&fl->u.ip6.saddr);
e53820de
MN
1300 }
1301 return 0;
1302}
1303
f8848067 1304static inline int xfrm_state_kern(const struct xfrm_state *x)
1da177e4
LT
1305{
1306 return atomic_read(&x->tunnel_users);
1307}
1308
5794708f
MN
1309static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1310{
dc00a525
MN
1311 return (!userproto || proto == userproto ||
1312 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1313 proto == IPPROTO_ESP ||
1314 proto == IPPROTO_COMP)));
5794708f
MN
1315}
1316
1da177e4
LT
1317/*
1318 * xfrm algorithm information
1319 */
1a6509d9 1320struct xfrm_algo_aead_info {
165ecc63 1321 char *geniv;
1a6509d9
HX
1322 u16 icv_truncbits;
1323};
1324
1da177e4
LT
1325struct xfrm_algo_auth_info {
1326 u16 icv_truncbits;
1327 u16 icv_fullbits;
1328};
1329
1330struct xfrm_algo_encr_info {
165ecc63 1331 char *geniv;
1da177e4
LT
1332 u16 blockbits;
1333 u16 defkeybits;
1334};
1335
1336struct xfrm_algo_comp_info {
1337 u16 threshold;
1338};
1339
1340struct xfrm_algo_desc {
1341 char *name;
04ff1260 1342 char *compat;
1da177e4 1343 u8 available:1;
7e50f84c 1344 u8 pfkey_supported:1;
1da177e4 1345 union {
1a6509d9 1346 struct xfrm_algo_aead_info aead;
1da177e4
LT
1347 struct xfrm_algo_auth_info auth;
1348 struct xfrm_algo_encr_info encr;
1349 struct xfrm_algo_comp_info comp;
1350 } uinfo;
1351 struct sadb_alg desc;
1352};
1353
3328715e
SK
1354/* XFRM protocol handlers. */
1355struct xfrm4_protocol {
1356 int (*handler)(struct sk_buff *skb);
1357 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1358 int encap_type);
1359 int (*cb_handler)(struct sk_buff *skb, int err);
1360 int (*err_handler)(struct sk_buff *skb, u32 info);
1361
1362 struct xfrm4_protocol __rcu *next;
1363 int priority;
1364};
1365
7e14ea15 1366struct xfrm6_protocol {
1da177e4 1367 int (*handler)(struct sk_buff *skb);
7e14ea15
SK
1368 int (*cb_handler)(struct sk_buff *skb, int err);
1369 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1370 u8 type, u8 code, int offset, __be32 info);
d2acc347 1371
7e14ea15 1372 struct xfrm6_protocol __rcu *next;
d2acc347 1373 int priority;
1da177e4
LT
1374};
1375
1da177e4
LT
1376/* XFRM tunnel handlers. */
1377struct xfrm_tunnel {
aba82695 1378 int (*handler)(struct sk_buff *skb);
a6337463 1379 int (*err_handler)(struct sk_buff *skb, u32 info);
d2acc347 1380
b33eab08 1381 struct xfrm_tunnel __rcu *next;
aba82695
FD
1382 int priority;
1383};
1384
1da177e4 1385struct xfrm6_tunnel {
d2acc347
HX
1386 int (*handler)(struct sk_buff *skb);
1387 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
d5fdd6ba 1388 u8 type, u8 code, int offset, __be32 info);
6f0bcf15 1389 struct xfrm6_tunnel __rcu *next;
d2acc347 1390 int priority;
1da177e4
LT
1391};
1392
d511337a
JP
1393void xfrm_init(void);
1394void xfrm4_init(void);
1395int xfrm_state_init(struct net *net);
1396void xfrm_state_fini(struct net *net);
1397void xfrm4_state_init(void);
2f32b51b 1398void xfrm4_protocol_init(void);
c35b7e72 1399#ifdef CONFIG_XFRM
d511337a
JP
1400int xfrm6_init(void);
1401void xfrm6_fini(void);
1402int xfrm6_state_init(void);
1403void xfrm6_state_fini(void);
7e14ea15
SK
1404int xfrm6_protocol_init(void);
1405void xfrm6_protocol_fini(void);
c35b7e72
DL
1406#else
1407static inline int xfrm6_init(void)
1408{
1409 return 0;
1410}
1411static inline void xfrm6_fini(void)
1412{
1413 ;
1414}
1415#endif
1da177e4 1416
558f82ef 1417#ifdef CONFIG_XFRM_STATISTICS
d511337a
JP
1418int xfrm_proc_init(struct net *net);
1419void xfrm_proc_fini(struct net *net);
558f82ef
MN
1420#endif
1421
d511337a 1422int xfrm_sysctl_init(struct net *net);
b27aeadb 1423#ifdef CONFIG_SYSCTL
d511337a 1424void xfrm_sysctl_fini(struct net *net);
b27aeadb
AD
1425#else
1426static inline void xfrm_sysctl_fini(struct net *net)
1427{
1428}
1429#endif
1430
d3623099 1431void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
870a2df4 1432 struct xfrm_address_filter *filter);
d511337a
JP
1433int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1434 int (*func)(struct xfrm_state *, int, void*), void *);
283bc9f3 1435void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
d511337a
JP
1436struct xfrm_state *xfrm_state_alloc(struct net *net);
1437struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1438 const xfrm_address_t *saddr,
1439 const struct flowi *fl,
1440 struct xfrm_tmpl *tmpl,
1441 struct xfrm_policy *pol, int *err,
1442 unsigned short family);
1443struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark,
1444 xfrm_address_t *daddr,
1445 xfrm_address_t *saddr,
1446 unsigned short family,
1447 u8 mode, u8 proto, u32 reqid);
c454997e
FD
1448struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1449 unsigned short family);
d511337a
JP
1450int xfrm_state_check_expire(struct xfrm_state *x);
1451void xfrm_state_insert(struct xfrm_state *x);
1452int xfrm_state_add(struct xfrm_state *x);
1453int xfrm_state_update(struct xfrm_state *x);
1454struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1455 const xfrm_address_t *daddr, __be32 spi,
1456 u8 proto, unsigned short family);
1457struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1458 const xfrm_address_t *daddr,
1459 const xfrm_address_t *saddr,
1460 u8 proto,
1461 unsigned short family);
41a49cc3 1462#ifdef CONFIG_XFRM_SUB_POLICY
d511337a 1463int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
283bc9f3 1464 unsigned short family, struct net *net);
d511337a
JP
1465int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1466 unsigned short family);
41a49cc3
MN
1467#else
1468static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src,
283bc9f3 1469 int n, unsigned short family, struct net *net)
41a49cc3
MN
1470{
1471 return -ENOSYS;
1472}
1473
1474static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src,
1475 int n, unsigned short family)
1476{
1477 return -ENOSYS;
1478}
1479#endif
af11e316
JHS
1480
1481struct xfrmk_sadinfo {
1482 u32 sadhcnt; /* current hash bkts */
1483 u32 sadhmcnt; /* max allowed hash bkts */
1484 u32 sadcnt; /* current running count */
1485};
1486
5a6d3416
JHS
1487struct xfrmk_spdinfo {
1488 u32 incnt;
1489 u32 outcnt;
1490 u32 fwdcnt;
1491 u32 inscnt;
1492 u32 outscnt;
1493 u32 fwdscnt;
1494 u32 spdhcnt;
1495 u32 spdhmcnt;
1496};
1497
d511337a
JP
1498struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1499int xfrm_state_delete(struct xfrm_state *x);
2e71029e 1500int xfrm_state_flush(struct net *net, u8 proto, bool task_valid);
d511337a
JP
1501void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1502void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1503u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1504int xfrm_init_replay(struct xfrm_state *x);
1505int xfrm_state_mtu(struct xfrm_state *x, int mtu);
1506int __xfrm_init_state(struct xfrm_state *x, bool init_replay);
1507int xfrm_init_state(struct xfrm_state *x);
1508int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb);
1509int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1510int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1511int xfrm_output_resume(struct sk_buff *skb, int err);
7026b1dd 1512int xfrm_output(struct sock *sk, struct sk_buff *skb);
d511337a
JP
1513int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1514void xfrm_local_error(struct sk_buff *skb, int mtu);
1515int xfrm4_extract_header(struct sk_buff *skb);
1516int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1517int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1518 int encap_type);
1519int xfrm4_transport_finish(struct sk_buff *skb, int async);
1520int xfrm4_rcv(struct sk_buff *skb);
c4541b41
HX
1521
1522static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1523{
70be6c91 1524 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
3328715e
SK
1525 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1526 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1527 return xfrm_input(skb, nexthdr, spi, 0);
c4541b41
HX
1528}
1529
d511337a
JP
1530int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1531int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
ede2059d 1532int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
7026b1dd 1533int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
3328715e
SK
1534int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1535int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1536int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
d511337a
JP
1537int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1538int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
d511337a
JP
1539void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1540int xfrm6_extract_header(struct sk_buff *skb);
1541int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
63c43787
ND
1542int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1543 struct ip6_tnl *t);
d511337a 1544int xfrm6_transport_finish(struct sk_buff *skb, int async);
63c43787 1545int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
d511337a
JP
1546int xfrm6_rcv(struct sk_buff *skb);
1547int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1548 xfrm_address_t *saddr, u8 proto);
7b77d161 1549void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
7e14ea15
SK
1550int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err);
1551int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1552int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
d511337a 1553int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
7b77d161 1554int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
d511337a
JP
1555__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1556__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1557int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1558int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
ede2059d 1559int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
7026b1dd 1560int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
d511337a
JP
1561int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1562 u8 **prevhdr);
1da177e4
LT
1563
1564#ifdef CONFIG_XFRM
d511337a
JP
1565int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1566int xfrm_user_policy(struct sock *sk, int optname,
1567 u8 __user *optval, int optlen);
1da177e4
LT
1568#else
1569static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1570{
1571 return -ENOPROTOOPT;
1572}
1573
067b207b 1574static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1da177e4
LT
1575{
1576 /* should not happen */
1577 kfree_skb(skb);
1578 return 0;
1579}
1da177e4
LT
1580#endif
1581
0331b1f3 1582struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
4c563f76 1583
d511337a
JP
1584void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1585int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1586 int (*func)(struct xfrm_policy *, int, int, void*),
1587 void *);
283bc9f3 1588void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1da177e4 1589int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
8ca2e93b
JHS
1590struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark,
1591 u8 type, int dir,
4e81bb83 1592 struct xfrm_selector *sel,
ef41aaa0
EP
1593 struct xfrm_sec_ctx *ctx, int delete,
1594 int *err);
d511337a
JP
1595struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir,
1596 u32 id, int delete, int *err);
2e71029e 1597int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
880a6fab 1598void xfrm_policy_hash_rebuild(struct net *net);
1da177e4 1599u32 xfrm_get_acqseq(void);
776e9dd9 1600int verify_spi_info(u8 proto, u32 min, u32 max);
d511337a 1601int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
e473fcb4 1602struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
bd55775c 1603 u8 mode, u32 reqid, u8 proto,
a70486f0
DM
1604 const xfrm_address_t *daddr,
1605 const xfrm_address_t *saddr, int create,
bd55775c 1606 unsigned short family);
d511337a 1607int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1da177e4 1608
80c9abaa 1609#ifdef CONFIG_XFRM_MIGRATE
d511337a
JP
1610int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1611 const struct xfrm_migrate *m, int num_bundles,
1612 const struct xfrm_kmaddress *k);
283bc9f3 1613struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
d511337a
JP
1614struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1615 struct xfrm_migrate *m);
1616int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1617 struct xfrm_migrate *m, int num_bundles,
8d549c4f 1618 struct xfrm_kmaddress *k, struct net *net);
80c9abaa
SS
1619#endif
1620
d511337a
JP
1621int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1622void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1623int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1624 xfrm_address_t *addr);
1625
1626void xfrm_input_init(void);
1627int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1628
1629void xfrm_probe_algs(void);
1630int xfrm_count_pfkey_auth_supported(void);
1631int xfrm_count_pfkey_enc_supported(void);
1632struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1633struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1634struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1635struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1636struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1637struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1638struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1639struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1640struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1641 int probe);
1da177e4 1642
70e94e66
YH
1643static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1644 const xfrm_address_t *b)
1645{
1646 return ipv6_addr_equal((const struct in6_addr *)a,
1647 (const struct in6_addr *)b);
1648}
1649
1650static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1651 const xfrm_address_t *b,
1652 sa_family_t family)
1da177e4
LT
1653{
1654 switch (family) {
1655 default:
1656 case AF_INET:
70e94e66 1657 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1da177e4 1658 case AF_INET6:
70e94e66 1659 return xfrm6_addr_equal(a, b);
1da177e4
LT
1660 }
1661}
1662
77d8d7a6
HX
1663static inline int xfrm_policy_id2dir(u32 index)
1664{
1665 return index & 7;
1666}
1667
a6483b79
AD
1668#ifdef CONFIG_XFRM
1669static inline int xfrm_aevent_is_on(struct net *net)
f8cd5488 1670{
be33690d
PM
1671 struct sock *nlsk;
1672 int ret = 0;
1673
1674 rcu_read_lock();
a6483b79 1675 nlsk = rcu_dereference(net->xfrm.nlsk);
be33690d
PM
1676 if (nlsk)
1677 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1678 rcu_read_unlock();
1679 return ret;
f8cd5488 1680}
0f24558e
HG
1681
1682static inline int xfrm_acquire_is_on(struct net *net)
1683{
1684 struct sock *nlsk;
1685 int ret = 0;
1686
1687 rcu_read_lock();
1688 nlsk = rcu_dereference(net->xfrm.nlsk);
1689 if (nlsk)
1690 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1691 rcu_read_unlock();
1692
1693 return ret;
1694}
a6483b79 1695#endif
f8cd5488 1696
ee5c2317
SK
1697static inline int aead_len(struct xfrm_algo_aead *alg)
1698{
1699 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1700}
1701
85158621 1702static inline int xfrm_alg_len(const struct xfrm_algo *alg)
0f99be0d
ED
1703{
1704 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1705}
1706
85158621 1707static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
4447bb33
MW
1708{
1709 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1710}
1711
9736acf3
SK
1712static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1713{
1714 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1715}
1716
80c9abaa 1717#ifdef CONFIG_XFRM_MIGRATE
af2f464e
SK
1718static inline int xfrm_replay_clone(struct xfrm_state *x,
1719 struct xfrm_state *orig)
1720{
1721 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1722 GFP_KERNEL);
1723 if (!x->replay_esn)
1724 return -ENOMEM;
1725
1726 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1727 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1728
1729 x->preplay_esn = kmemdup(x->replay_esn,
1730 xfrm_replay_state_esn_len(x->replay_esn),
1731 GFP_KERNEL);
1732 if (!x->preplay_esn) {
1733 kfree(x->replay_esn);
1734 return -ENOMEM;
1735 }
1736
1737 return 0;
1738}
1739
ee5c2317
SK
1740static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1741{
1742 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1743}
1744
1745
80c9abaa
SS
1746static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1747{
0f99be0d 1748 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
80c9abaa
SS
1749}
1750
4447bb33
MW
1751static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1752{
1753 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1754}
1755
80c9abaa
SS
1756static inline void xfrm_states_put(struct xfrm_state **states, int n)
1757{
1758 int i;
1759 for (i = 0; i < n; i++)
1760 xfrm_state_put(*(states + i));
1761}
1762
1763static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1764{
1765 int i;
1766 for (i = 0; i < n; i++)
1767 xfrm_state_delete(*(states + i));
1768}
1769#endif
f8cd5488 1770
def8b4fa 1771#ifdef CONFIG_XFRM
00501121
HX
1772static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1773{
1774 return skb->sp->xvec[skb->sp->len - 1];
1775}
def8b4fa 1776#endif
00501121 1777
bf825f81
JHS
1778static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1779{
1780 if (attrs[XFRMA_MARK])
4efd7e83 1781 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
bf825f81
JHS
1782 else
1783 m->v = m->m = 0;
1784
1785 return m->v & m->m;
1786}
1787
e3dfa389 1788static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
bf825f81 1789{
1d1e34dd 1790 int ret = 0;
bf825f81 1791
1d1e34dd
DM
1792 if (m->m | m->v)
1793 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1794 return ret;
bf825f81
JHS
1795}
1796
70be6c91
SK
1797static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1798 unsigned int family)
1799{
1800 bool tunnel = false;
1801
1802 switch(family) {
1803 case AF_INET:
1804 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1805 tunnel = true;
1806 break;
1807 case AF_INET6:
1808 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1809 tunnel = true;
1810 break;
1811 }
1812 if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL))
1813 return -EINVAL;
1814
1815 return 0;
1816}
1da177e4 1817#endif /* _NET_XFRM_H */