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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> |
1da177e4 LT |
15 | |
16 | #include <net/sock.h> | |
17 | #include <net/dst.h> | |
436a0a40 | 18 | #include <net/ip.h> |
1da177e4 LT |
19 | #include <net/route.h> |
20 | #include <net/ipv6.h> | |
21 | #include <net/ip6_fib.h> | |
22 | ||
d3d6dd3a MN |
23 | #define XFRM_PROTO_ESP 50 |
24 | #define XFRM_PROTO_AH 51 | |
25 | #define XFRM_PROTO_COMP 108 | |
26 | #define XFRM_PROTO_IPIP 4 | |
27 | #define XFRM_PROTO_IPV6 41 | |
28 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
29 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
30 | ||
1da177e4 | 31 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
32 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
33 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
34 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
35 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 36 | |
f8cd5488 JHS |
37 | extern struct sock *xfrm_nl; |
38 | extern u32 sysctl_xfrm_aevent_etime; | |
39 | extern u32 sysctl_xfrm_aevent_rseqth; | |
40 | ||
4a3e2f71 | 41 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
42 | |
43 | /* Organization of SPD aka "XFRM rules" | |
44 | ------------------------------------ | |
45 | ||
46 | Basic objects: | |
47 | - policy rule, struct xfrm_policy (=SPD entry) | |
48 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
49 | - instance of a transformer, struct xfrm_state (=SA) | |
50 | - template to clone xfrm_state, struct xfrm_tmpl | |
51 | ||
52 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
53 | (To be compatible with existing pfkeyv2 implementations, | |
54 | many rules with priority of 0x7fffffff are allowed to exist and | |
55 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
56 | ||
57 | Lookup is plain linear search until the first match with selector. | |
58 | ||
59 | If "action" is "block", then we prohibit the flow, otherwise: | |
60 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
61 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
62 | described by templates xfrm_tmpl. Each template is resolved | |
63 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
64 | to a dst_entry returned to requestor. | |
65 | ||
66 | dst -. xfrm .-> xfrm_state #1 | |
67 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
68 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
69 | |---. child .-> NULL | |
70 | ||
71 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
72 | ||
73 | ||
74 | Resolution of xrfm_tmpl | |
75 | ----------------------- | |
76 | Template contains: | |
77 | 1. ->mode Mode: transport or tunnel | |
78 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
79 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
80 | Q: allow to resolve security gateway? | |
81 | 4. ->id.spi If not zero, static SPI. | |
82 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
83 | 6. ->algos List of allowed algos. Plain bitmask now. | |
84 | Q: ealgos, aalgos, calgos. What a mess... | |
85 | 7. ->share Sharing mode. | |
86 | Q: how to implement private sharing mode? To add struct sock* to | |
87 | flow id? | |
88 | ||
89 | Having this template we search through SAD searching for entries | |
90 | with appropriate mode/proto/algo, permitted by selector. | |
91 | If no appropriate entry found, it is requested from key manager. | |
92 | ||
93 | PROBLEMS: | |
94 | Q: How to find all the bundles referring to a physical path for | |
95 | PMTU discovery? Seems, dst should contain list of all parents... | |
96 | and enter to infinite locking hierarchy disaster. | |
97 | No! It is easier, we will not search for them, let them find us. | |
98 | We add genid to each dst plus pointer to genid of raw IP route, | |
99 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
100 | dst_check() will see this for top level and trigger resyncing | |
101 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
102 | */ | |
103 | ||
104 | /* Full description of state of transformer. */ | |
105 | struct xfrm_state | |
106 | { | |
107 | /* Note: bydst is re-used during gc */ | |
8f126e37 DM |
108 | struct hlist_node bydst; |
109 | struct hlist_node bysrc; | |
110 | struct hlist_node byspi; | |
1da177e4 LT |
111 | |
112 | atomic_t refcnt; | |
113 | spinlock_t lock; | |
114 | ||
115 | struct xfrm_id id; | |
116 | struct xfrm_selector sel; | |
117 | ||
9d4a706d DM |
118 | u32 genid; |
119 | ||
1da177e4 LT |
120 | /* Key manger bits */ |
121 | struct { | |
122 | u8 state; | |
123 | u8 dying; | |
124 | u32 seq; | |
125 | } km; | |
126 | ||
127 | /* Parameters of this state. */ | |
128 | struct { | |
129 | u32 reqid; | |
130 | u8 mode; | |
131 | u8 replay_window; | |
132 | u8 aalgo, ealgo, calgo; | |
133 | u8 flags; | |
134 | u16 family; | |
135 | xfrm_address_t saddr; | |
136 | int header_len; | |
137 | int trailer_len; | |
138 | } props; | |
139 | ||
140 | struct xfrm_lifetime_cfg lft; | |
141 | ||
142 | /* Data for transformer */ | |
143 | struct xfrm_algo *aalg; | |
144 | struct xfrm_algo *ealg; | |
145 | struct xfrm_algo *calg; | |
146 | ||
147 | /* Data for encapsulator */ | |
148 | struct xfrm_encap_tmpl *encap; | |
149 | ||
060f02a3 NT |
150 | /* Data for care-of address */ |
151 | xfrm_address_t *coaddr; | |
152 | ||
1da177e4 LT |
153 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
154 | struct xfrm_state *tunnel; | |
155 | ||
156 | /* If a tunnel, number of users + 1 */ | |
157 | atomic_t tunnel_users; | |
158 | ||
159 | /* State for replay detection */ | |
160 | struct xfrm_replay_state replay; | |
161 | ||
f8cd5488 JHS |
162 | /* Replay detection state at the time we sent the last notification */ |
163 | struct xfrm_replay_state preplay; | |
164 | ||
2717096a JHS |
165 | /* internal flag that only holds state for delayed aevent at the |
166 | * moment | |
167 | */ | |
168 | u32 xflags; | |
169 | ||
f8cd5488 JHS |
170 | /* Replay detection notification settings */ |
171 | u32 replay_maxage; | |
172 | u32 replay_maxdiff; | |
173 | ||
174 | /* Replay detection notification timer */ | |
175 | struct timer_list rtimer; | |
176 | ||
1da177e4 LT |
177 | /* Statistics */ |
178 | struct xfrm_stats stats; | |
179 | ||
180 | struct xfrm_lifetime_cur curlft; | |
181 | struct timer_list timer; | |
182 | ||
9afaca05 MN |
183 | /* Last used time */ |
184 | u64 lastused; | |
185 | ||
1da177e4 LT |
186 | /* Reference to data common to all the instances of this |
187 | * transformer. */ | |
188 | struct xfrm_type *type; | |
b59f45d0 | 189 | struct xfrm_mode *mode; |
1da177e4 | 190 | |
df71837d TJ |
191 | /* Security context */ |
192 | struct xfrm_sec_ctx *security; | |
193 | ||
1da177e4 LT |
194 | /* Private data of this transformer, format is opaque, |
195 | * interpreted by xfrm_type methods. */ | |
196 | void *data; | |
197 | }; | |
198 | ||
2717096a JHS |
199 | /* xflags - make enum if more show up */ |
200 | #define XFRM_TIME_DEFER 1 | |
201 | ||
1da177e4 LT |
202 | enum { |
203 | XFRM_STATE_VOID, | |
204 | XFRM_STATE_ACQ, | |
205 | XFRM_STATE_VALID, | |
206 | XFRM_STATE_ERROR, | |
207 | XFRM_STATE_EXPIRED, | |
208 | XFRM_STATE_DEAD | |
209 | }; | |
210 | ||
26b15dad JHS |
211 | /* callback structure passed from either netlink or pfkey */ |
212 | struct km_event | |
213 | { | |
bf08867f HX |
214 | union { |
215 | u32 hard; | |
216 | u32 proto; | |
217 | u32 byid; | |
f8cd5488 | 218 | u32 aevent; |
f7b6983f | 219 | u32 type; |
bf08867f HX |
220 | } data; |
221 | ||
26b15dad JHS |
222 | u32 seq; |
223 | u32 pid; | |
224 | u32 event; | |
225 | }; | |
226 | ||
1da177e4 LT |
227 | struct xfrm_type; |
228 | struct xfrm_dst; | |
229 | struct xfrm_policy_afinfo { | |
230 | unsigned short family; | |
1da177e4 LT |
231 | struct dst_ops *dst_ops; |
232 | void (*garbage_collect)(void); | |
233 | int (*dst_lookup)(struct xfrm_dst **dst, struct flowi *fl); | |
a1e59abf | 234 | int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 LT |
235 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
236 | int (*bundle_create)(struct xfrm_policy *policy, | |
237 | struct xfrm_state **xfrm, | |
238 | int nx, | |
239 | struct flowi *fl, | |
240 | struct dst_entry **dst_p); | |
241 | void (*decode_session)(struct sk_buff *skb, | |
242 | struct flowi *fl); | |
243 | }; | |
244 | ||
245 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
246 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
247 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
248 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
249 | |
250 | struct xfrm_tmpl; | |
980ebd25 | 251 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
252 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
253 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
254 | ||
1da177e4 LT |
255 | struct xfrm_state_afinfo { |
256 | unsigned short family; | |
aa5d62cc HX |
257 | struct xfrm_type *type_map[IPPROTO_MAX]; |
258 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
d094cd83 | 259 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
260 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
261 | struct xfrm_tmpl *tmpl, | |
262 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
41a49cc3 MN |
263 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
264 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 265 | int (*output)(struct sk_buff *skb); |
1da177e4 LT |
266 | }; |
267 | ||
268 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
269 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
cdca7265 MK |
270 | extern struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family); |
271 | extern void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
1da177e4 LT |
272 | |
273 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
274 | ||
1da177e4 LT |
275 | struct xfrm_type |
276 | { | |
277 | char *description; | |
278 | struct module *owner; | |
279 | __u8 proto; | |
1b5c2299 MN |
280 | __u8 flags; |
281 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
436a0a40 | 282 | #define XFRM_TYPE_REPLAY_PROT 2 |
1da177e4 | 283 | |
72cb6962 | 284 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 285 | void (*destructor)(struct xfrm_state *); |
e695633e | 286 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 287 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 288 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 289 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
99505a84 MN |
290 | xfrm_address_t *(*local_addr)(struct xfrm_state *, xfrm_address_t *); |
291 | xfrm_address_t *(*remote_addr)(struct xfrm_state *, xfrm_address_t *); | |
1da177e4 | 292 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 293 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
294 | }; |
295 | ||
1da177e4 LT |
296 | extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); |
297 | extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); | |
1da177e4 | 298 | |
b59f45d0 HX |
299 | struct xfrm_mode { |
300 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); | |
37fedd3a HX |
301 | |
302 | /* | |
303 | * Add encapsulation header. | |
304 | * | |
305 | * On exit, the transport header will be set to the start of the | |
306 | * encapsulation header to be filled in by x->type->output and | |
307 | * the mac header will be set to the nextheader (protocol for | |
308 | * IPv4) field of the extension header directly preceding the | |
309 | * encapsulation header, or in its absence, that of the top IP | |
310 | * header. The value of the network header will always point | |
311 | * to the top IP header while skb->data will point to the payload. | |
312 | */ | |
eb878e84 | 313 | int (*output)(struct xfrm_state *x,struct sk_buff *skb); |
b59f45d0 HX |
314 | |
315 | struct module *owner; | |
316 | unsigned int encap; | |
1bfcb10f HX |
317 | int flags; |
318 | }; | |
319 | ||
320 | /* Flags for xfrm_mode. */ | |
321 | enum { | |
322 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
323 | }; |
324 | ||
325 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
326 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 327 | |
1da177e4 LT |
328 | struct xfrm_tmpl |
329 | { | |
330 | /* id in template is interpreted as: | |
331 | * daddr - destination of tunnel, may be zero for transport mode. | |
332 | * spi - zero to acquire spi. Not zero if spi is static, then | |
333 | * daddr must be fixed too. | |
334 | * proto - AH/ESP/IPCOMP | |
335 | */ | |
336 | struct xfrm_id id; | |
337 | ||
338 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
339 | xfrm_address_t saddr; | |
340 | ||
76b3f055 MK |
341 | unsigned short encap_family; |
342 | ||
1da177e4 LT |
343 | __u32 reqid; |
344 | ||
7e49e6de | 345 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
346 | __u8 mode; |
347 | ||
348 | /* Sharing mode: unique, this session only, this user only etc. */ | |
349 | __u8 share; | |
350 | ||
351 | /* May skip this transfomration if no SA is found */ | |
352 | __u8 optional; | |
353 | ||
354 | /* Bit mask of algos allowed for acquisition */ | |
355 | __u32 aalgos; | |
356 | __u32 ealgos; | |
357 | __u32 calgos; | |
358 | }; | |
359 | ||
622dc828 | 360 | #define XFRM_MAX_DEPTH 6 |
1da177e4 LT |
361 | |
362 | struct xfrm_policy | |
363 | { | |
364 | struct xfrm_policy *next; | |
2518c7c2 DM |
365 | struct hlist_node bydst; |
366 | struct hlist_node byidx; | |
1da177e4 LT |
367 | |
368 | /* This lock only affects elements except for entry. */ | |
369 | rwlock_t lock; | |
370 | atomic_t refcnt; | |
371 | struct timer_list timer; | |
372 | ||
373 | u32 priority; | |
374 | u32 index; | |
375 | struct xfrm_selector selector; | |
376 | struct xfrm_lifetime_cfg lft; | |
377 | struct xfrm_lifetime_cur curlft; | |
378 | struct dst_entry *bundles; | |
46ca5f5d ACM |
379 | u16 family; |
380 | u8 type; | |
381 | u8 action; | |
382 | u8 flags; | |
383 | u8 dead; | |
384 | u8 xfrm_nr; | |
385 | /* XXX 1 byte hole, try to pack */ | |
df71837d | 386 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
387 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
388 | }; | |
389 | ||
80c9abaa SS |
390 | struct xfrm_migrate { |
391 | xfrm_address_t old_daddr; | |
392 | xfrm_address_t old_saddr; | |
393 | xfrm_address_t new_daddr; | |
394 | xfrm_address_t new_saddr; | |
395 | u8 proto; | |
396 | u8 mode; | |
397 | u16 reserved; | |
398 | u32 reqid; | |
399 | u16 old_family; | |
400 | u16 new_family; | |
401 | }; | |
402 | ||
f8cd5488 JHS |
403 | #define XFRM_KM_TIMEOUT 30 |
404 | /* which seqno */ | |
405 | #define XFRM_REPLAY_SEQ 1 | |
406 | #define XFRM_REPLAY_OSEQ 2 | |
407 | #define XFRM_REPLAY_SEQ_MASK 3 | |
408 | /* what happened */ | |
409 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
410 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
411 | ||
412 | /* default aevent timeout in units of 100ms */ | |
413 | #define XFRM_AE_ETIME 10 | |
414 | /* Async Event timer multiplier */ | |
415 | #define XFRM_AE_ETH_M 10 | |
416 | /* default seq threshold size */ | |
417 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
418 | |
419 | struct xfrm_mgr | |
420 | { | |
421 | struct list_head list; | |
422 | char *id; | |
26b15dad | 423 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 424 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 425 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 426 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 427 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
97a64b45 | 428 | int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
80c9abaa | 429 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); |
1da177e4 LT |
430 | }; |
431 | ||
432 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
433 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
434 | ||
2518c7c2 | 435 | extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; |
1da177e4 | 436 | |
436a0a40 HX |
437 | /* |
438 | * This structure is used for the duration where packets are being | |
439 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
440 | * area beyond the generic IP part may be overwritten. | |
441 | */ | |
442 | struct xfrm_skb_cb { | |
443 | union { | |
444 | struct inet_skb_parm h4; | |
445 | struct inet6_skb_parm h6; | |
446 | } header; | |
447 | ||
448 | /* Sequence number for replay protection. */ | |
449 | u64 seq; | |
450 | }; | |
451 | ||
452 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
453 | ||
161a09e7 JL |
454 | /* Audit Information */ |
455 | struct xfrm_audit | |
456 | { | |
ab5f5e8b | 457 | u32 loginuid; |
161a09e7 JL |
458 | u32 secid; |
459 | }; | |
c9204d9c JL |
460 | |
461 | #ifdef CONFIG_AUDITSYSCALL | |
ab5f5e8b JL |
462 | static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) |
463 | { | |
464 | struct audit_buffer *audit_buf = NULL; | |
465 | char *secctx; | |
466 | u32 secctx_len; | |
467 | ||
468 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, | |
469 | AUDIT_MAC_IPSEC_EVENT); | |
470 | if (audit_buf == NULL) | |
471 | return NULL; | |
472 | ||
473 | audit_log_format(audit_buf, "auid=%u", auid); | |
474 | ||
475 | if (sid != 0 && | |
476 | security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { | |
477 | audit_log_format(audit_buf, " subj=%s", secctx); | |
478 | security_release_secctx(secctx, secctx_len); | |
479 | } else | |
480 | audit_log_task_context(audit_buf); | |
481 | return audit_buf; | |
482 | } | |
483 | ||
484 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
485 | u32 auid, u32 sid); | |
486 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
487 | u32 auid, u32 sid); | |
488 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
489 | u32 auid, u32 sid); | |
490 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
491 | u32 auid, u32 sid); | |
c9204d9c | 492 | #else |
ab5f5e8b JL |
493 | #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) |
494 | #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) | |
495 | #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) | |
496 | #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) | |
c9204d9c | 497 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 498 | |
1da177e4 LT |
499 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
500 | { | |
501 | if (likely(policy != NULL)) | |
502 | atomic_inc(&policy->refcnt); | |
503 | } | |
504 | ||
505 | extern void __xfrm_policy_destroy(struct xfrm_policy *policy); | |
506 | ||
507 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
508 | { | |
509 | if (atomic_dec_and_test(&policy->refcnt)) | |
510 | __xfrm_policy_destroy(policy); | |
511 | } | |
512 | ||
4e81bb83 MN |
513 | #ifdef CONFIG_XFRM_SUB_POLICY |
514 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
515 | { | |
516 | int i; | |
517 | for (i = npols - 1; i >= 0; --i) | |
518 | xfrm_pol_put(pols[i]); | |
519 | } | |
520 | #else | |
521 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
522 | { | |
523 | xfrm_pol_put(pols[0]); | |
524 | } | |
525 | #endif | |
526 | ||
1da177e4 LT |
527 | extern void __xfrm_state_destroy(struct xfrm_state *); |
528 | ||
21380b81 HX |
529 | static inline void __xfrm_state_put(struct xfrm_state *x) |
530 | { | |
531 | atomic_dec(&x->refcnt); | |
532 | } | |
533 | ||
1da177e4 LT |
534 | static inline void xfrm_state_put(struct xfrm_state *x) |
535 | { | |
536 | if (atomic_dec_and_test(&x->refcnt)) | |
537 | __xfrm_state_destroy(x); | |
538 | } | |
539 | ||
540 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
541 | { | |
542 | atomic_inc(&x->refcnt); | |
543 | } | |
544 | ||
545 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
546 | { | |
5f19343f AV |
547 | __be32 *a1 = token1; |
548 | __be32 *a2 = token2; | |
1da177e4 LT |
549 | int pdw; |
550 | int pbi; | |
551 | ||
552 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
553 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
554 | ||
555 | if (pdw) | |
556 | if (memcmp(a1, a2, pdw << 2)) | |
557 | return 0; | |
558 | ||
559 | if (pbi) { | |
5f19343f | 560 | __be32 mask; |
1da177e4 LT |
561 | |
562 | mask = htonl((0xffffffff) << (32 - pbi)); | |
563 | ||
564 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
565 | return 0; | |
566 | } | |
567 | ||
568 | return 1; | |
569 | } | |
570 | ||
571 | static __inline__ | |
f9d07e41 | 572 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 573 | { |
f9d07e41 | 574 | __be16 port; |
1da177e4 LT |
575 | switch(fl->proto) { |
576 | case IPPROTO_TCP: | |
577 | case IPPROTO_UDP: | |
ba4e58ec | 578 | case IPPROTO_UDPLITE: |
1da177e4 LT |
579 | case IPPROTO_SCTP: |
580 | port = fl->fl_ip_sport; | |
581 | break; | |
582 | case IPPROTO_ICMP: | |
583 | case IPPROTO_ICMPV6: | |
584 | port = htons(fl->fl_icmp_type); | |
585 | break; | |
2ce4272a MN |
586 | case IPPROTO_MH: |
587 | port = htons(fl->fl_mh_type); | |
588 | break; | |
1da177e4 LT |
589 | default: |
590 | port = 0; /*XXX*/ | |
591 | } | |
592 | return port; | |
593 | } | |
594 | ||
595 | static __inline__ | |
f9d07e41 | 596 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 597 | { |
f9d07e41 | 598 | __be16 port; |
1da177e4 LT |
599 | switch(fl->proto) { |
600 | case IPPROTO_TCP: | |
601 | case IPPROTO_UDP: | |
ba4e58ec | 602 | case IPPROTO_UDPLITE: |
1da177e4 LT |
603 | case IPPROTO_SCTP: |
604 | port = fl->fl_ip_dport; | |
605 | break; | |
606 | case IPPROTO_ICMP: | |
607 | case IPPROTO_ICMPV6: | |
608 | port = htons(fl->fl_icmp_code); | |
609 | break; | |
610 | default: | |
611 | port = 0; /*XXX*/ | |
612 | } | |
613 | return port; | |
614 | } | |
615 | ||
77681021 AM |
616 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
617 | unsigned short family); | |
1da177e4 | 618 | |
df71837d TJ |
619 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
620 | /* If neither has a context --> match | |
621 | * Otherwise, both must have a context and the sids, doi, alg must match | |
622 | */ | |
623 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
624 | { | |
625 | return ((!s1 && !s2) || | |
626 | (s1 && s2 && | |
627 | (s1->ctx_sid == s2->ctx_sid) && | |
628 | (s1->ctx_doi == s2->ctx_doi) && | |
629 | (s1->ctx_alg == s2->ctx_alg))); | |
630 | } | |
631 | #else | |
632 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
633 | { | |
634 | return 1; | |
635 | } | |
636 | #endif | |
637 | ||
1da177e4 LT |
638 | /* A struct encoding bundle of transformations to apply to some set of flow. |
639 | * | |
640 | * dst->child points to the next element of bundle. | |
641 | * dst->xfrm points to an instanse of transformer. | |
642 | * | |
643 | * Due to unfortunate limitations of current routing cache, which we | |
644 | * have no time to fix, it mirrors struct rtable and bound to the same | |
645 | * routing key, including saddr,daddr. However, we can have many of | |
646 | * bundles differing by session id. All the bundles grow from a parent | |
647 | * policy rule. | |
648 | */ | |
649 | struct xfrm_dst | |
650 | { | |
651 | union { | |
1da177e4 LT |
652 | struct dst_entry dst; |
653 | struct rtable rt; | |
654 | struct rt6_info rt6; | |
655 | } u; | |
656 | struct dst_entry *route; | |
157bfc25 MN |
657 | #ifdef CONFIG_XFRM_SUB_POLICY |
658 | struct flowi *origin; | |
659 | struct xfrm_selector *partner; | |
660 | #endif | |
9d4a706d | 661 | u32 genid; |
1da177e4 LT |
662 | u32 route_mtu_cached; |
663 | u32 child_mtu_cached; | |
92d63dec HY |
664 | u32 route_cookie; |
665 | u32 path_cookie; | |
1da177e4 LT |
666 | }; |
667 | ||
aabc9761 HX |
668 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
669 | { | |
670 | dst_release(xdst->route); | |
671 | if (likely(xdst->u.dst.xfrm)) | |
672 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
673 | #ifdef CONFIG_XFRM_SUB_POLICY |
674 | kfree(xdst->origin); | |
675 | xdst->origin = NULL; | |
676 | kfree(xdst->partner); | |
677 | xdst->partner = NULL; | |
678 | #endif | |
aabc9761 HX |
679 | } |
680 | ||
681 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
682 | ||
1da177e4 LT |
683 | struct sec_path |
684 | { | |
685 | atomic_t refcnt; | |
686 | int len; | |
dbe5b4aa | 687 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
688 | }; |
689 | ||
690 | static inline struct sec_path * | |
691 | secpath_get(struct sec_path *sp) | |
692 | { | |
693 | if (sp) | |
694 | atomic_inc(&sp->refcnt); | |
695 | return sp; | |
696 | } | |
697 | ||
698 | extern void __secpath_destroy(struct sec_path *sp); | |
699 | ||
700 | static inline void | |
701 | secpath_put(struct sec_path *sp) | |
702 | { | |
703 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
704 | __secpath_destroy(sp); | |
705 | } | |
706 | ||
707 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
708 | ||
709 | static inline void | |
710 | secpath_reset(struct sk_buff *skb) | |
711 | { | |
712 | #ifdef CONFIG_XFRM | |
713 | secpath_put(skb->sp); | |
714 | skb->sp = NULL; | |
715 | #endif | |
716 | } | |
717 | ||
a1e59abf PM |
718 | static inline int |
719 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
720 | { | |
721 | switch (family) { | |
722 | case AF_INET: | |
723 | return addr->a4 == 0; | |
724 | case AF_INET6: | |
725 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
726 | } | |
727 | return 0; | |
728 | } | |
729 | ||
1da177e4 LT |
730 | static inline int |
731 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
732 | { | |
733 | return (tmpl->saddr.a4 && | |
734 | tmpl->saddr.a4 != x->props.saddr.a4); | |
735 | } | |
736 | ||
737 | static inline int | |
738 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
739 | { | |
740 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
741 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
742 | } | |
743 | ||
744 | static inline int | |
745 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
746 | { | |
747 | switch (family) { | |
748 | case AF_INET: | |
749 | return __xfrm4_state_addr_cmp(tmpl, x); | |
750 | case AF_INET6: | |
751 | return __xfrm6_state_addr_cmp(tmpl, x); | |
752 | } | |
753 | return !0; | |
754 | } | |
755 | ||
756 | #ifdef CONFIG_XFRM | |
757 | ||
758 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); | |
759 | ||
760 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
761 | { | |
762 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) | |
763 | return __xfrm_policy_check(sk, dir, skb, family); | |
4e81bb83 | 764 | |
2518c7c2 | 765 | return (!xfrm_policy_count[dir] && !skb->sp) || |
1da177e4 LT |
766 | (skb->dst->flags & DST_NOPOLICY) || |
767 | __xfrm_policy_check(sk, dir, skb, family); | |
768 | } | |
769 | ||
770 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
771 | { | |
772 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
773 | } | |
774 | ||
775 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
776 | { | |
777 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
778 | } | |
779 | ||
3e3850e9 | 780 | extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); |
1da177e4 LT |
781 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
782 | ||
783 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
784 | { | |
2518c7c2 | 785 | return !xfrm_policy_count[XFRM_POLICY_OUT] || |
1da177e4 LT |
786 | (skb->dst->flags & DST_NOXFRM) || |
787 | __xfrm_route_forward(skb, family); | |
788 | } | |
789 | ||
790 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
791 | { | |
792 | return xfrm_route_forward(skb, AF_INET); | |
793 | } | |
794 | ||
795 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
796 | { | |
797 | return xfrm_route_forward(skb, AF_INET6); | |
798 | } | |
799 | ||
800 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
801 | ||
802 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
803 | { | |
804 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
805 | return __xfrm_sk_clone_policy(sk); | |
806 | return 0; | |
807 | } | |
808 | ||
4666faab | 809 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
810 | |
811 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
812 | { | |
813 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
814 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
815 | sk->sk_policy[0] = NULL; | |
816 | } | |
817 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
818 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
819 | sk->sk_policy[1] = NULL; | |
820 | } | |
821 | } | |
822 | ||
823 | #else | |
824 | ||
825 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
826 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
827 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
828 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
829 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
830 | { | |
831 | return 1; | |
832 | } | |
833 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
834 | { | |
835 | return 1; | |
836 | } | |
837 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
838 | { | |
839 | return 1; | |
840 | } | |
841 | #endif | |
842 | ||
843 | static __inline__ | |
844 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
845 | { | |
846 | switch (family){ | |
847 | case AF_INET: | |
848 | return (xfrm_address_t *)&fl->fl4_dst; | |
849 | case AF_INET6: | |
850 | return (xfrm_address_t *)&fl->fl6_dst; | |
851 | } | |
852 | return NULL; | |
853 | } | |
854 | ||
855 | static __inline__ | |
856 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
857 | { | |
858 | switch (family){ | |
859 | case AF_INET: | |
860 | return (xfrm_address_t *)&fl->fl4_src; | |
861 | case AF_INET6: | |
862 | return (xfrm_address_t *)&fl->fl6_src; | |
863 | } | |
864 | return NULL; | |
865 | } | |
866 | ||
867 | static __inline__ int | |
868 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
869 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
870 | { | |
871 | if (daddr->a4 == x->id.daddr.a4 && | |
872 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
873 | return 1; | |
874 | return 0; | |
875 | } | |
876 | ||
877 | static __inline__ int | |
878 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
879 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
880 | { | |
881 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
882 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
883 | ipv6_addr_any((struct in6_addr *)saddr) || | |
884 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
885 | return 1; | |
886 | return 0; | |
887 | } | |
888 | ||
889 | static __inline__ int | |
890 | xfrm_state_addr_check(struct xfrm_state *x, | |
891 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
892 | unsigned short family) | |
893 | { | |
894 | switch (family) { | |
895 | case AF_INET: | |
896 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
897 | case AF_INET6: | |
898 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
899 | } | |
900 | return 0; | |
901 | } | |
902 | ||
e53820de MN |
903 | static __inline__ int |
904 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
905 | unsigned short family) | |
906 | { | |
907 | switch (family) { | |
908 | case AF_INET: | |
909 | return __xfrm4_state_addr_check(x, | |
910 | (xfrm_address_t *)&fl->fl4_dst, | |
911 | (xfrm_address_t *)&fl->fl4_src); | |
912 | case AF_INET6: | |
913 | return __xfrm6_state_addr_check(x, | |
914 | (xfrm_address_t *)&fl->fl6_dst, | |
915 | (xfrm_address_t *)&fl->fl6_src); | |
916 | } | |
917 | return 0; | |
918 | } | |
919 | ||
1da177e4 LT |
920 | static inline int xfrm_state_kern(struct xfrm_state *x) |
921 | { | |
922 | return atomic_read(&x->tunnel_users); | |
923 | } | |
924 | ||
5794708f MN |
925 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
926 | { | |
dc00a525 MN |
927 | return (!userproto || proto == userproto || |
928 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
929 | proto == IPPROTO_ESP || | |
930 | proto == IPPROTO_COMP))); | |
5794708f MN |
931 | } |
932 | ||
1da177e4 LT |
933 | /* |
934 | * xfrm algorithm information | |
935 | */ | |
936 | struct xfrm_algo_auth_info { | |
937 | u16 icv_truncbits; | |
938 | u16 icv_fullbits; | |
939 | }; | |
940 | ||
941 | struct xfrm_algo_encr_info { | |
942 | u16 blockbits; | |
943 | u16 defkeybits; | |
944 | }; | |
945 | ||
946 | struct xfrm_algo_comp_info { | |
947 | u16 threshold; | |
948 | }; | |
949 | ||
950 | struct xfrm_algo_desc { | |
951 | char *name; | |
04ff1260 | 952 | char *compat; |
1da177e4 LT |
953 | u8 available:1; |
954 | union { | |
955 | struct xfrm_algo_auth_info auth; | |
956 | struct xfrm_algo_encr_info encr; | |
957 | struct xfrm_algo_comp_info comp; | |
958 | } uinfo; | |
959 | struct sadb_alg desc; | |
960 | }; | |
961 | ||
962 | /* XFRM tunnel handlers. */ | |
963 | struct xfrm_tunnel { | |
964 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
965 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
966 | ||
967 | struct xfrm_tunnel *next; | |
968 | int priority; | |
1da177e4 LT |
969 | }; |
970 | ||
971 | struct xfrm6_tunnel { | |
d2acc347 HX |
972 | int (*handler)(struct sk_buff *skb); |
973 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 974 | int type, int code, int offset, __be32 info); |
d2acc347 HX |
975 | struct xfrm6_tunnel *next; |
976 | int priority; | |
1da177e4 LT |
977 | }; |
978 | ||
979 | extern void xfrm_init(void); | |
980 | extern void xfrm4_init(void); | |
981 | extern void xfrm6_init(void); | |
982 | extern void xfrm6_fini(void); | |
983 | extern void xfrm_state_init(void); | |
984 | extern void xfrm4_state_init(void); | |
1da177e4 LT |
985 | extern void xfrm6_state_init(void); |
986 | extern void xfrm6_state_fini(void); | |
987 | ||
988 | extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); | |
989 | extern struct xfrm_state *xfrm_state_alloc(void); | |
990 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
991 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
992 | struct xfrm_policy *pol, int *err, | |
993 | unsigned short family); | |
628529b6 JHS |
994 | extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, |
995 | xfrm_address_t *saddr, | |
996 | unsigned short family, | |
997 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
998 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
999 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1000 | extern int xfrm_state_add(struct xfrm_state *x); | |
1001 | extern int xfrm_state_update(struct xfrm_state *x); | |
a94cfd19 | 1002 | extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
eb2971b6 | 1003 | extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); |
41a49cc3 MN |
1004 | #ifdef CONFIG_XFRM_SUB_POLICY |
1005 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1006 | int n, unsigned short family); | |
1007 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1008 | int n, unsigned short family); | |
1009 | #else | |
1010 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1011 | int n, unsigned short family) | |
1012 | { | |
1013 | return -ENOSYS; | |
1014 | } | |
1015 | ||
1016 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1017 | int n, unsigned short family) | |
1018 | { | |
1019 | return -ENOSYS; | |
1020 | } | |
1021 | #endif | |
af11e316 JHS |
1022 | |
1023 | struct xfrmk_sadinfo { | |
1024 | u32 sadhcnt; /* current hash bkts */ | |
1025 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1026 | u32 sadcnt; /* current running count */ | |
1027 | }; | |
1028 | ||
5a6d3416 JHS |
1029 | struct xfrmk_spdinfo { |
1030 | u32 incnt; | |
1031 | u32 outcnt; | |
1032 | u32 fwdcnt; | |
1033 | u32 inscnt; | |
1034 | u32 outscnt; | |
1035 | u32 fwdscnt; | |
1036 | u32 spdhcnt; | |
1037 | u32 spdhmcnt; | |
1038 | }; | |
1039 | ||
1da177e4 | 1040 | extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); |
26b15dad | 1041 | extern int xfrm_state_delete(struct xfrm_state *x); |
4aa2e62c | 1042 | extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); |
af11e316 | 1043 | extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
5a6d3416 | 1044 | extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
a252cc23 | 1045 | extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); |
61f4627b | 1046 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1047 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1048 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1049 | extern int xfrm_init_state(struct xfrm_state *x); |
406ef77c | 1050 | extern int xfrm_output(struct sk_buff *skb); |
c4541b41 HX |
1051 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1052 | int encap_type); | |
1da177e4 | 1053 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1054 | |
1055 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1056 | { | |
1057 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1058 | } | |
1059 | ||
1da177e4 | 1060 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1061 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1062 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
33b5ecb8 | 1063 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
e5bbef20 | 1064 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1065 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1066 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1067 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1068 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
8c689a6e | 1069 | extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); |
1da177e4 | 1070 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
8c689a6e | 1071 | extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); |
1da177e4 | 1072 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1073 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1074 | u8 **prevhdr); | |
1da177e4 LT |
1075 | |
1076 | #ifdef CONFIG_XFRM | |
067b207b | 1077 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 LT |
1078 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1079 | extern int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family); | |
1080 | #else | |
1081 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1082 | { | |
1083 | return -ENOPROTOOPT; | |
1084 | } | |
1085 | ||
067b207b | 1086 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1087 | { |
1088 | /* should not happen */ | |
1089 | kfree_skb(skb); | |
1090 | return 0; | |
1091 | } | |
067b207b | 1092 | |
1da177e4 LT |
1093 | static inline int xfrm_dst_lookup(struct xfrm_dst **dst, struct flowi *fl, unsigned short family) |
1094 | { | |
1095 | return -EINVAL; | |
1096 | } | |
1097 | #endif | |
1098 | ||
dd0fc66f | 1099 | struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); |
4e81bb83 | 1100 | extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); |
1da177e4 | 1101 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4e81bb83 MN |
1102 | struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
1103 | struct xfrm_selector *sel, | |
ef41aaa0 EP |
1104 | struct xfrm_sec_ctx *ctx, int delete, |
1105 | int *err); | |
1106 | struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); | |
4aa2e62c | 1107 | int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1108 | u32 xfrm_get_acqseq(void); |
658b219e | 1109 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
161a09e7 JL |
1110 | struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1111 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 | 1112 | int create, unsigned short family); |
4aa2e62c | 1113 | extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1114 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
5b368e61 VY |
1115 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
1116 | struct flowi *fl, int family, int strict); | |
1da177e4 LT |
1117 | extern void xfrm_init_pmtu(struct dst_entry *dst); |
1118 | ||
80c9abaa SS |
1119 | #ifdef CONFIG_XFRM_MIGRATE |
1120 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1121 | struct xfrm_migrate *m, int num_bundles); | |
1122 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); | |
1123 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1124 | struct xfrm_migrate *m); | |
1125 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1126 | struct xfrm_migrate *m, int num_bundles); | |
1127 | #endif | |
1128 | ||
1da177e4 | 1129 | extern wait_queue_head_t km_waitq; |
5d36b180 | 1130 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1131 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
97a64b45 | 1132 | extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1133 | |
1134 | extern void xfrm_input_init(void); | |
6067b2ba | 1135 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1136 | |
1137 | extern void xfrm_probe_algs(void); | |
1138 | extern int xfrm_count_auth_supported(void); | |
1139 | extern int xfrm_count_enc_supported(void); | |
1140 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1141 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1142 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1143 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1144 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1145 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1146 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1147 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1148 | ||
07d4ee58 | 1149 | struct hash_desc; |
9409f38a | 1150 | struct scatterlist; |
07d4ee58 HX |
1151 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1152 | unsigned int); | |
1da177e4 | 1153 | |
07d4ee58 HX |
1154 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1155 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1156 | |
1157 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1158 | int family) | |
1159 | { | |
1160 | switch (family) { | |
1161 | default: | |
1162 | case AF_INET: | |
8c689a6e | 1163 | return (__force __u32)a->a4 - (__force __u32)b->a4; |
1da177e4 LT |
1164 | case AF_INET6: |
1165 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1166 | (struct in6_addr *)b); | |
1167 | } | |
1168 | } | |
1169 | ||
77d8d7a6 HX |
1170 | static inline int xfrm_policy_id2dir(u32 index) |
1171 | { | |
1172 | return index & 7; | |
1173 | } | |
1174 | ||
f8cd5488 JHS |
1175 | static inline int xfrm_aevent_is_on(void) |
1176 | { | |
be33690d PM |
1177 | struct sock *nlsk; |
1178 | int ret = 0; | |
1179 | ||
1180 | rcu_read_lock(); | |
1181 | nlsk = rcu_dereference(xfrm_nl); | |
1182 | if (nlsk) | |
1183 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1184 | rcu_read_unlock(); | |
1185 | return ret; | |
f8cd5488 JHS |
1186 | } |
1187 | ||
80c9abaa SS |
1188 | #ifdef CONFIG_XFRM_MIGRATE |
1189 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1190 | { | |
1191 | return (struct xfrm_algo *)kmemdup(orig, sizeof(*orig) + orig->alg_key_len, GFP_KERNEL); | |
1192 | } | |
1193 | ||
1194 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1195 | { | |
1196 | int i; | |
1197 | for (i = 0; i < n; i++) | |
1198 | xfrm_state_put(*(states + i)); | |
1199 | } | |
1200 | ||
1201 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1202 | { | |
1203 | int i; | |
1204 | for (i = 0; i < n; i++) | |
1205 | xfrm_state_delete(*(states + i)); | |
1206 | } | |
1207 | #endif | |
f8cd5488 | 1208 | |
1da177e4 | 1209 | #endif /* _NET_XFRM_H */ |