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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; | |
a37ae408 PE |
40 | extern int sysctl_xfrm_larval_drop; |
41 | extern u32 sysctl_xfrm_acq_expires; | |
f8cd5488 | 42 | |
4a3e2f71 | 43 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
44 | |
45 | /* Organization of SPD aka "XFRM rules" | |
46 | ------------------------------------ | |
47 | ||
48 | Basic objects: | |
49 | - policy rule, struct xfrm_policy (=SPD entry) | |
50 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
51 | - instance of a transformer, struct xfrm_state (=SA) | |
52 | - template to clone xfrm_state, struct xfrm_tmpl | |
53 | ||
54 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
55 | (To be compatible with existing pfkeyv2 implementations, | |
56 | many rules with priority of 0x7fffffff are allowed to exist and | |
57 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
58 | ||
59 | Lookup is plain linear search until the first match with selector. | |
60 | ||
61 | If "action" is "block", then we prohibit the flow, otherwise: | |
62 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
63 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
64 | described by templates xfrm_tmpl. Each template is resolved | |
65 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
66 | to a dst_entry returned to requestor. | |
67 | ||
68 | dst -. xfrm .-> xfrm_state #1 | |
69 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
70 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
71 | |---. child .-> NULL | |
72 | ||
73 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
74 | ||
75 | ||
76 | Resolution of xrfm_tmpl | |
77 | ----------------------- | |
78 | Template contains: | |
79 | 1. ->mode Mode: transport or tunnel | |
80 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
81 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
82 | Q: allow to resolve security gateway? | |
83 | 4. ->id.spi If not zero, static SPI. | |
84 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
85 | 6. ->algos List of allowed algos. Plain bitmask now. | |
86 | Q: ealgos, aalgos, calgos. What a mess... | |
87 | 7. ->share Sharing mode. | |
88 | Q: how to implement private sharing mode? To add struct sock* to | |
89 | flow id? | |
90 | ||
91 | Having this template we search through SAD searching for entries | |
92 | with appropriate mode/proto/algo, permitted by selector. | |
93 | If no appropriate entry found, it is requested from key manager. | |
94 | ||
95 | PROBLEMS: | |
96 | Q: How to find all the bundles referring to a physical path for | |
97 | PMTU discovery? Seems, dst should contain list of all parents... | |
98 | and enter to infinite locking hierarchy disaster. | |
99 | No! It is easier, we will not search for them, let them find us. | |
100 | We add genid to each dst plus pointer to genid of raw IP route, | |
101 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
102 | dst_check() will see this for top level and trigger resyncing | |
103 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
104 | */ | |
105 | ||
106 | /* Full description of state of transformer. */ | |
107 | struct xfrm_state | |
108 | { | |
109 | /* Note: bydst is re-used during gc */ | |
8f126e37 DM |
110 | struct hlist_node bydst; |
111 | struct hlist_node bysrc; | |
112 | struct hlist_node byspi; | |
1da177e4 LT |
113 | |
114 | atomic_t refcnt; | |
115 | spinlock_t lock; | |
116 | ||
117 | struct xfrm_id id; | |
118 | struct xfrm_selector sel; | |
119 | ||
9d4a706d DM |
120 | u32 genid; |
121 | ||
1da177e4 LT |
122 | /* Key manger bits */ |
123 | struct { | |
124 | u8 state; | |
125 | u8 dying; | |
126 | u32 seq; | |
127 | } km; | |
128 | ||
129 | /* Parameters of this state. */ | |
130 | struct { | |
131 | u32 reqid; | |
132 | u8 mode; | |
133 | u8 replay_window; | |
134 | u8 aalgo, ealgo, calgo; | |
135 | u8 flags; | |
136 | u16 family; | |
137 | xfrm_address_t saddr; | |
138 | int header_len; | |
139 | int trailer_len; | |
140 | } props; | |
141 | ||
142 | struct xfrm_lifetime_cfg lft; | |
143 | ||
144 | /* Data for transformer */ | |
145 | struct xfrm_algo *aalg; | |
146 | struct xfrm_algo *ealg; | |
147 | struct xfrm_algo *calg; | |
148 | ||
149 | /* Data for encapsulator */ | |
150 | struct xfrm_encap_tmpl *encap; | |
151 | ||
060f02a3 NT |
152 | /* Data for care-of address */ |
153 | xfrm_address_t *coaddr; | |
154 | ||
1da177e4 LT |
155 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
156 | struct xfrm_state *tunnel; | |
157 | ||
158 | /* If a tunnel, number of users + 1 */ | |
159 | atomic_t tunnel_users; | |
160 | ||
161 | /* State for replay detection */ | |
162 | struct xfrm_replay_state replay; | |
163 | ||
f8cd5488 JHS |
164 | /* Replay detection state at the time we sent the last notification */ |
165 | struct xfrm_replay_state preplay; | |
166 | ||
2717096a JHS |
167 | /* internal flag that only holds state for delayed aevent at the |
168 | * moment | |
169 | */ | |
170 | u32 xflags; | |
171 | ||
f8cd5488 JHS |
172 | /* Replay detection notification settings */ |
173 | u32 replay_maxage; | |
174 | u32 replay_maxdiff; | |
175 | ||
176 | /* Replay detection notification timer */ | |
177 | struct timer_list rtimer; | |
178 | ||
1da177e4 LT |
179 | /* Statistics */ |
180 | struct xfrm_stats stats; | |
181 | ||
182 | struct xfrm_lifetime_cur curlft; | |
183 | struct timer_list timer; | |
184 | ||
9afaca05 MN |
185 | /* Last used time */ |
186 | u64 lastused; | |
187 | ||
1da177e4 LT |
188 | /* Reference to data common to all the instances of this |
189 | * transformer. */ | |
190 | struct xfrm_type *type; | |
13996378 HX |
191 | struct xfrm_mode *inner_mode; |
192 | struct xfrm_mode *outer_mode; | |
1da177e4 | 193 | |
df71837d TJ |
194 | /* Security context */ |
195 | struct xfrm_sec_ctx *security; | |
196 | ||
1da177e4 LT |
197 | /* Private data of this transformer, format is opaque, |
198 | * interpreted by xfrm_type methods. */ | |
199 | void *data; | |
200 | }; | |
201 | ||
2717096a JHS |
202 | /* xflags - make enum if more show up */ |
203 | #define XFRM_TIME_DEFER 1 | |
204 | ||
1da177e4 LT |
205 | enum { |
206 | XFRM_STATE_VOID, | |
207 | XFRM_STATE_ACQ, | |
208 | XFRM_STATE_VALID, | |
209 | XFRM_STATE_ERROR, | |
210 | XFRM_STATE_EXPIRED, | |
211 | XFRM_STATE_DEAD | |
212 | }; | |
213 | ||
26b15dad JHS |
214 | /* callback structure passed from either netlink or pfkey */ |
215 | struct km_event | |
216 | { | |
bf08867f HX |
217 | union { |
218 | u32 hard; | |
219 | u32 proto; | |
220 | u32 byid; | |
f8cd5488 | 221 | u32 aevent; |
f7b6983f | 222 | u32 type; |
bf08867f HX |
223 | } data; |
224 | ||
26b15dad JHS |
225 | u32 seq; |
226 | u32 pid; | |
227 | u32 event; | |
228 | }; | |
229 | ||
25ee3286 | 230 | struct net_device; |
1da177e4 LT |
231 | struct xfrm_type; |
232 | struct xfrm_dst; | |
233 | struct xfrm_policy_afinfo { | |
234 | unsigned short family; | |
1da177e4 LT |
235 | struct dst_ops *dst_ops; |
236 | void (*garbage_collect)(void); | |
66cdb3ca HX |
237 | struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, |
238 | xfrm_address_t *daddr); | |
a1e59abf | 239 | int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 240 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
1da177e4 LT |
241 | void (*decode_session)(struct sk_buff *skb, |
242 | struct flowi *fl); | |
25ee3286 HX |
243 | int (*get_tos)(struct flowi *fl); |
244 | int (*fill_dst)(struct xfrm_dst *xdst, | |
245 | struct net_device *dev); | |
1da177e4 LT |
246 | }; |
247 | ||
248 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
249 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
250 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
251 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
252 | |
253 | struct xfrm_tmpl; | |
980ebd25 | 254 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
255 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
256 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
257 | ||
1da177e4 | 258 | struct xfrm_state_afinfo { |
17c2a42a | 259 | unsigned int family; |
36cf9acf | 260 | unsigned int proto; |
17c2a42a | 261 | struct module *owner; |
aa5d62cc HX |
262 | struct xfrm_type *type_map[IPPROTO_MAX]; |
263 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
d094cd83 | 264 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
265 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
266 | struct xfrm_tmpl *tmpl, | |
267 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
41a49cc3 MN |
268 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
269 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 270 | int (*output)(struct sk_buff *skb); |
36cf9acf HX |
271 | int (*extract_output)(struct xfrm_state *x, |
272 | struct sk_buff *skb); | |
1da177e4 LT |
273 | }; |
274 | ||
275 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
276 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
277 | ||
278 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
279 | ||
1da177e4 LT |
280 | struct xfrm_type |
281 | { | |
282 | char *description; | |
283 | struct module *owner; | |
284 | __u8 proto; | |
1b5c2299 MN |
285 | __u8 flags; |
286 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
436a0a40 | 287 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
288 | #define XFRM_TYPE_LOCAL_COADDR 4 |
289 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 290 | |
72cb6962 | 291 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 292 | void (*destructor)(struct xfrm_state *); |
e695633e | 293 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 294 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 295 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 296 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 297 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 298 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
299 | }; |
300 | ||
1da177e4 LT |
301 | extern int xfrm_register_type(struct xfrm_type *type, unsigned short family); |
302 | extern int xfrm_unregister_type(struct xfrm_type *type, unsigned short family); | |
1da177e4 | 303 | |
b59f45d0 HX |
304 | struct xfrm_mode { |
305 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); | |
37fedd3a HX |
306 | |
307 | /* | |
308 | * Add encapsulation header. | |
309 | * | |
310 | * On exit, the transport header will be set to the start of the | |
311 | * encapsulation header to be filled in by x->type->output and | |
312 | * the mac header will be set to the nextheader (protocol for | |
313 | * IPv4) field of the extension header directly preceding the | |
314 | * encapsulation header, or in its absence, that of the top IP | |
315 | * header. The value of the network header will always point | |
316 | * to the top IP header while skb->data will point to the payload. | |
317 | */ | |
36cf9acf HX |
318 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
319 | ||
320 | /* | |
321 | * This is the actual output entry point. | |
322 | * | |
323 | * For transport mode and equivalent this would be identical to | |
324 | * output2 (which does not need to be set). While tunnel mode | |
325 | * and equivalent would set this to a tunnel encapsulation function | |
326 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
327 | * call output2. | |
328 | */ | |
329 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 330 | |
17c2a42a | 331 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
332 | struct module *owner; |
333 | unsigned int encap; | |
1bfcb10f HX |
334 | int flags; |
335 | }; | |
336 | ||
337 | /* Flags for xfrm_mode. */ | |
338 | enum { | |
339 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
340 | }; |
341 | ||
342 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
343 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 344 | |
1da177e4 LT |
345 | struct xfrm_tmpl |
346 | { | |
347 | /* id in template is interpreted as: | |
348 | * daddr - destination of tunnel, may be zero for transport mode. | |
349 | * spi - zero to acquire spi. Not zero if spi is static, then | |
350 | * daddr must be fixed too. | |
351 | * proto - AH/ESP/IPCOMP | |
352 | */ | |
353 | struct xfrm_id id; | |
354 | ||
355 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
356 | xfrm_address_t saddr; | |
357 | ||
76b3f055 MK |
358 | unsigned short encap_family; |
359 | ||
1da177e4 LT |
360 | __u32 reqid; |
361 | ||
7e49e6de | 362 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
363 | __u8 mode; |
364 | ||
365 | /* Sharing mode: unique, this session only, this user only etc. */ | |
366 | __u8 share; | |
367 | ||
368 | /* May skip this transfomration if no SA is found */ | |
369 | __u8 optional; | |
370 | ||
371 | /* Bit mask of algos allowed for acquisition */ | |
372 | __u32 aalgos; | |
373 | __u32 ealgos; | |
374 | __u32 calgos; | |
375 | }; | |
376 | ||
622dc828 | 377 | #define XFRM_MAX_DEPTH 6 |
1da177e4 LT |
378 | |
379 | struct xfrm_policy | |
380 | { | |
381 | struct xfrm_policy *next; | |
2518c7c2 DM |
382 | struct hlist_node bydst; |
383 | struct hlist_node byidx; | |
1da177e4 LT |
384 | |
385 | /* This lock only affects elements except for entry. */ | |
386 | rwlock_t lock; | |
387 | atomic_t refcnt; | |
388 | struct timer_list timer; | |
389 | ||
390 | u32 priority; | |
391 | u32 index; | |
392 | struct xfrm_selector selector; | |
393 | struct xfrm_lifetime_cfg lft; | |
394 | struct xfrm_lifetime_cur curlft; | |
395 | struct dst_entry *bundles; | |
46ca5f5d ACM |
396 | u16 family; |
397 | u8 type; | |
398 | u8 action; | |
399 | u8 flags; | |
400 | u8 dead; | |
401 | u8 xfrm_nr; | |
402 | /* XXX 1 byte hole, try to pack */ | |
df71837d | 403 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
404 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
405 | }; | |
406 | ||
80c9abaa SS |
407 | struct xfrm_migrate { |
408 | xfrm_address_t old_daddr; | |
409 | xfrm_address_t old_saddr; | |
410 | xfrm_address_t new_daddr; | |
411 | xfrm_address_t new_saddr; | |
412 | u8 proto; | |
413 | u8 mode; | |
414 | u16 reserved; | |
415 | u32 reqid; | |
416 | u16 old_family; | |
417 | u16 new_family; | |
418 | }; | |
419 | ||
f8cd5488 JHS |
420 | #define XFRM_KM_TIMEOUT 30 |
421 | /* which seqno */ | |
422 | #define XFRM_REPLAY_SEQ 1 | |
423 | #define XFRM_REPLAY_OSEQ 2 | |
424 | #define XFRM_REPLAY_SEQ_MASK 3 | |
425 | /* what happened */ | |
426 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
427 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
428 | ||
429 | /* default aevent timeout in units of 100ms */ | |
430 | #define XFRM_AE_ETIME 10 | |
431 | /* Async Event timer multiplier */ | |
432 | #define XFRM_AE_ETH_M 10 | |
433 | /* default seq threshold size */ | |
434 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
435 | |
436 | struct xfrm_mgr | |
437 | { | |
438 | struct list_head list; | |
439 | char *id; | |
26b15dad | 440 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 441 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 442 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 443 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 444 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
97a64b45 | 445 | int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
80c9abaa | 446 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); |
1da177e4 LT |
447 | }; |
448 | ||
449 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
450 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
451 | ||
2518c7c2 | 452 | extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; |
1da177e4 | 453 | |
436a0a40 HX |
454 | /* |
455 | * This structure is used for the duration where packets are being | |
456 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
457 | * area beyond the generic IP part may be overwritten. | |
458 | */ | |
459 | struct xfrm_skb_cb { | |
460 | union { | |
461 | struct inet_skb_parm h4; | |
462 | struct inet6_skb_parm h6; | |
463 | } header; | |
464 | ||
465 | /* Sequence number for replay protection. */ | |
466 | u64 seq; | |
467 | }; | |
468 | ||
469 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
470 | ||
36cf9acf HX |
471 | /* |
472 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
473 | * to transmit header information to the mode input/output functions. | |
474 | */ | |
475 | struct xfrm_mode_skb_cb { | |
476 | union { | |
477 | struct inet_skb_parm h4; | |
478 | struct inet6_skb_parm h6; | |
479 | } header; | |
480 | ||
481 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
482 | __be16 id; | |
483 | __be16 frag_off; | |
484 | ||
485 | /* TOS for IPv4, class for IPv6. */ | |
486 | u8 tos; | |
487 | ||
488 | /* TTL for IPv4, hop limitfor IPv6. */ | |
489 | u8 ttl; | |
490 | ||
491 | /* Protocol for IPv4, NH for IPv6. */ | |
492 | u8 protocol; | |
493 | ||
494 | /* Used by IPv6 only, zero for IPv4. */ | |
495 | u8 flow_lbl[3]; | |
496 | }; | |
497 | ||
498 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
499 | ||
161a09e7 JL |
500 | /* Audit Information */ |
501 | struct xfrm_audit | |
502 | { | |
ab5f5e8b | 503 | u32 loginuid; |
161a09e7 JL |
504 | u32 secid; |
505 | }; | |
c9204d9c JL |
506 | |
507 | #ifdef CONFIG_AUDITSYSCALL | |
ab5f5e8b JL |
508 | static inline struct audit_buffer *xfrm_audit_start(u32 auid, u32 sid) |
509 | { | |
510 | struct audit_buffer *audit_buf = NULL; | |
511 | char *secctx; | |
512 | u32 secctx_len; | |
513 | ||
514 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, | |
515 | AUDIT_MAC_IPSEC_EVENT); | |
516 | if (audit_buf == NULL) | |
517 | return NULL; | |
518 | ||
519 | audit_log_format(audit_buf, "auid=%u", auid); | |
520 | ||
521 | if (sid != 0 && | |
522 | security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) { | |
523 | audit_log_format(audit_buf, " subj=%s", secctx); | |
524 | security_release_secctx(secctx, secctx_len); | |
525 | } else | |
526 | audit_log_task_context(audit_buf); | |
527 | return audit_buf; | |
528 | } | |
529 | ||
530 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
531 | u32 auid, u32 sid); | |
532 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
533 | u32 auid, u32 sid); | |
534 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
535 | u32 auid, u32 sid); | |
536 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
537 | u32 auid, u32 sid); | |
c9204d9c | 538 | #else |
ab5f5e8b JL |
539 | #define xfrm_audit_policy_add(x, r, a, s) do { ; } while (0) |
540 | #define xfrm_audit_policy_delete(x, r, a, s) do { ; } while (0) | |
541 | #define xfrm_audit_state_add(x, r, a, s) do { ; } while (0) | |
542 | #define xfrm_audit_state_delete(x, r, a, s) do { ; } while (0) | |
c9204d9c | 543 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 544 | |
1da177e4 LT |
545 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
546 | { | |
547 | if (likely(policy != NULL)) | |
548 | atomic_inc(&policy->refcnt); | |
549 | } | |
550 | ||
551 | extern void __xfrm_policy_destroy(struct xfrm_policy *policy); | |
552 | ||
553 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
554 | { | |
555 | if (atomic_dec_and_test(&policy->refcnt)) | |
556 | __xfrm_policy_destroy(policy); | |
557 | } | |
558 | ||
4e81bb83 MN |
559 | #ifdef CONFIG_XFRM_SUB_POLICY |
560 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
561 | { | |
562 | int i; | |
563 | for (i = npols - 1; i >= 0; --i) | |
564 | xfrm_pol_put(pols[i]); | |
565 | } | |
566 | #else | |
567 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
568 | { | |
569 | xfrm_pol_put(pols[0]); | |
570 | } | |
571 | #endif | |
572 | ||
1da177e4 LT |
573 | extern void __xfrm_state_destroy(struct xfrm_state *); |
574 | ||
21380b81 HX |
575 | static inline void __xfrm_state_put(struct xfrm_state *x) |
576 | { | |
577 | atomic_dec(&x->refcnt); | |
578 | } | |
579 | ||
1da177e4 LT |
580 | static inline void xfrm_state_put(struct xfrm_state *x) |
581 | { | |
582 | if (atomic_dec_and_test(&x->refcnt)) | |
583 | __xfrm_state_destroy(x); | |
584 | } | |
585 | ||
586 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
587 | { | |
588 | atomic_inc(&x->refcnt); | |
589 | } | |
590 | ||
591 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
592 | { | |
5f19343f AV |
593 | __be32 *a1 = token1; |
594 | __be32 *a2 = token2; | |
1da177e4 LT |
595 | int pdw; |
596 | int pbi; | |
597 | ||
598 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
599 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
600 | ||
601 | if (pdw) | |
602 | if (memcmp(a1, a2, pdw << 2)) | |
603 | return 0; | |
604 | ||
605 | if (pbi) { | |
5f19343f | 606 | __be32 mask; |
1da177e4 LT |
607 | |
608 | mask = htonl((0xffffffff) << (32 - pbi)); | |
609 | ||
610 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
611 | return 0; | |
612 | } | |
613 | ||
614 | return 1; | |
615 | } | |
616 | ||
617 | static __inline__ | |
f9d07e41 | 618 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 619 | { |
f9d07e41 | 620 | __be16 port; |
1da177e4 LT |
621 | switch(fl->proto) { |
622 | case IPPROTO_TCP: | |
623 | case IPPROTO_UDP: | |
ba4e58ec | 624 | case IPPROTO_UDPLITE: |
1da177e4 LT |
625 | case IPPROTO_SCTP: |
626 | port = fl->fl_ip_sport; | |
627 | break; | |
628 | case IPPROTO_ICMP: | |
629 | case IPPROTO_ICMPV6: | |
630 | port = htons(fl->fl_icmp_type); | |
631 | break; | |
2ce4272a MN |
632 | case IPPROTO_MH: |
633 | port = htons(fl->fl_mh_type); | |
634 | break; | |
1da177e4 LT |
635 | default: |
636 | port = 0; /*XXX*/ | |
637 | } | |
638 | return port; | |
639 | } | |
640 | ||
641 | static __inline__ | |
f9d07e41 | 642 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 643 | { |
f9d07e41 | 644 | __be16 port; |
1da177e4 LT |
645 | switch(fl->proto) { |
646 | case IPPROTO_TCP: | |
647 | case IPPROTO_UDP: | |
ba4e58ec | 648 | case IPPROTO_UDPLITE: |
1da177e4 LT |
649 | case IPPROTO_SCTP: |
650 | port = fl->fl_ip_dport; | |
651 | break; | |
652 | case IPPROTO_ICMP: | |
653 | case IPPROTO_ICMPV6: | |
654 | port = htons(fl->fl_icmp_code); | |
655 | break; | |
656 | default: | |
657 | port = 0; /*XXX*/ | |
658 | } | |
659 | return port; | |
660 | } | |
661 | ||
77681021 AM |
662 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
663 | unsigned short family); | |
1da177e4 | 664 | |
df71837d TJ |
665 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
666 | /* If neither has a context --> match | |
667 | * Otherwise, both must have a context and the sids, doi, alg must match | |
668 | */ | |
669 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
670 | { | |
671 | return ((!s1 && !s2) || | |
672 | (s1 && s2 && | |
673 | (s1->ctx_sid == s2->ctx_sid) && | |
674 | (s1->ctx_doi == s2->ctx_doi) && | |
675 | (s1->ctx_alg == s2->ctx_alg))); | |
676 | } | |
677 | #else | |
678 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
679 | { | |
680 | return 1; | |
681 | } | |
682 | #endif | |
683 | ||
1da177e4 LT |
684 | /* A struct encoding bundle of transformations to apply to some set of flow. |
685 | * | |
686 | * dst->child points to the next element of bundle. | |
687 | * dst->xfrm points to an instanse of transformer. | |
688 | * | |
689 | * Due to unfortunate limitations of current routing cache, which we | |
690 | * have no time to fix, it mirrors struct rtable and bound to the same | |
691 | * routing key, including saddr,daddr. However, we can have many of | |
692 | * bundles differing by session id. All the bundles grow from a parent | |
693 | * policy rule. | |
694 | */ | |
695 | struct xfrm_dst | |
696 | { | |
697 | union { | |
1da177e4 LT |
698 | struct dst_entry dst; |
699 | struct rtable rt; | |
700 | struct rt6_info rt6; | |
701 | } u; | |
702 | struct dst_entry *route; | |
157bfc25 MN |
703 | #ifdef CONFIG_XFRM_SUB_POLICY |
704 | struct flowi *origin; | |
705 | struct xfrm_selector *partner; | |
706 | #endif | |
9d4a706d | 707 | u32 genid; |
1da177e4 LT |
708 | u32 route_mtu_cached; |
709 | u32 child_mtu_cached; | |
92d63dec HY |
710 | u32 route_cookie; |
711 | u32 path_cookie; | |
1da177e4 LT |
712 | }; |
713 | ||
aabc9761 HX |
714 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
715 | { | |
716 | dst_release(xdst->route); | |
717 | if (likely(xdst->u.dst.xfrm)) | |
718 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
719 | #ifdef CONFIG_XFRM_SUB_POLICY |
720 | kfree(xdst->origin); | |
721 | xdst->origin = NULL; | |
722 | kfree(xdst->partner); | |
723 | xdst->partner = NULL; | |
724 | #endif | |
aabc9761 HX |
725 | } |
726 | ||
727 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
728 | ||
1da177e4 LT |
729 | struct sec_path |
730 | { | |
731 | atomic_t refcnt; | |
732 | int len; | |
dbe5b4aa | 733 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
734 | }; |
735 | ||
736 | static inline struct sec_path * | |
737 | secpath_get(struct sec_path *sp) | |
738 | { | |
739 | if (sp) | |
740 | atomic_inc(&sp->refcnt); | |
741 | return sp; | |
742 | } | |
743 | ||
744 | extern void __secpath_destroy(struct sec_path *sp); | |
745 | ||
746 | static inline void | |
747 | secpath_put(struct sec_path *sp) | |
748 | { | |
749 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
750 | __secpath_destroy(sp); | |
751 | } | |
752 | ||
753 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
754 | ||
755 | static inline void | |
756 | secpath_reset(struct sk_buff *skb) | |
757 | { | |
758 | #ifdef CONFIG_XFRM | |
759 | secpath_put(skb->sp); | |
760 | skb->sp = NULL; | |
761 | #endif | |
762 | } | |
763 | ||
a1e59abf PM |
764 | static inline int |
765 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
766 | { | |
767 | switch (family) { | |
768 | case AF_INET: | |
769 | return addr->a4 == 0; | |
770 | case AF_INET6: | |
771 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
772 | } | |
773 | return 0; | |
774 | } | |
775 | ||
1da177e4 LT |
776 | static inline int |
777 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
778 | { | |
779 | return (tmpl->saddr.a4 && | |
780 | tmpl->saddr.a4 != x->props.saddr.a4); | |
781 | } | |
782 | ||
783 | static inline int | |
784 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
785 | { | |
786 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
787 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
788 | } | |
789 | ||
790 | static inline int | |
791 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
792 | { | |
793 | switch (family) { | |
794 | case AF_INET: | |
795 | return __xfrm4_state_addr_cmp(tmpl, x); | |
796 | case AF_INET6: | |
797 | return __xfrm6_state_addr_cmp(tmpl, x); | |
798 | } | |
799 | return !0; | |
800 | } | |
801 | ||
802 | #ifdef CONFIG_XFRM | |
803 | ||
804 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); | |
805 | ||
806 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
807 | { | |
808 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) | |
809 | return __xfrm_policy_check(sk, dir, skb, family); | |
4e81bb83 | 810 | |
2518c7c2 | 811 | return (!xfrm_policy_count[dir] && !skb->sp) || |
1da177e4 LT |
812 | (skb->dst->flags & DST_NOPOLICY) || |
813 | __xfrm_policy_check(sk, dir, skb, family); | |
814 | } | |
815 | ||
816 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
817 | { | |
818 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
819 | } | |
820 | ||
821 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
822 | { | |
823 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
824 | } | |
825 | ||
3e3850e9 | 826 | extern int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, unsigned short family); |
1da177e4 LT |
827 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
828 | ||
829 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
830 | { | |
2518c7c2 | 831 | return !xfrm_policy_count[XFRM_POLICY_OUT] || |
1da177e4 LT |
832 | (skb->dst->flags & DST_NOXFRM) || |
833 | __xfrm_route_forward(skb, family); | |
834 | } | |
835 | ||
836 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
837 | { | |
838 | return xfrm_route_forward(skb, AF_INET); | |
839 | } | |
840 | ||
841 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
842 | { | |
843 | return xfrm_route_forward(skb, AF_INET6); | |
844 | } | |
845 | ||
846 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
847 | ||
848 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
849 | { | |
850 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
851 | return __xfrm_sk_clone_policy(sk); | |
852 | return 0; | |
853 | } | |
854 | ||
4666faab | 855 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
856 | |
857 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
858 | { | |
859 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
860 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
861 | sk->sk_policy[0] = NULL; | |
862 | } | |
863 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
864 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
865 | sk->sk_policy[1] = NULL; | |
866 | } | |
867 | } | |
868 | ||
869 | #else | |
870 | ||
871 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
872 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
873 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
874 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
875 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
876 | { | |
877 | return 1; | |
878 | } | |
879 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
880 | { | |
881 | return 1; | |
882 | } | |
883 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
884 | { | |
885 | return 1; | |
886 | } | |
887 | #endif | |
888 | ||
889 | static __inline__ | |
890 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
891 | { | |
892 | switch (family){ | |
893 | case AF_INET: | |
894 | return (xfrm_address_t *)&fl->fl4_dst; | |
895 | case AF_INET6: | |
896 | return (xfrm_address_t *)&fl->fl6_dst; | |
897 | } | |
898 | return NULL; | |
899 | } | |
900 | ||
901 | static __inline__ | |
902 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
903 | { | |
904 | switch (family){ | |
905 | case AF_INET: | |
906 | return (xfrm_address_t *)&fl->fl4_src; | |
907 | case AF_INET6: | |
908 | return (xfrm_address_t *)&fl->fl6_src; | |
909 | } | |
910 | return NULL; | |
911 | } | |
912 | ||
913 | static __inline__ int | |
914 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
915 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
916 | { | |
917 | if (daddr->a4 == x->id.daddr.a4 && | |
918 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
919 | return 1; | |
920 | return 0; | |
921 | } | |
922 | ||
923 | static __inline__ int | |
924 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
925 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
926 | { | |
927 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
928 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
929 | ipv6_addr_any((struct in6_addr *)saddr) || | |
930 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
931 | return 1; | |
932 | return 0; | |
933 | } | |
934 | ||
935 | static __inline__ int | |
936 | xfrm_state_addr_check(struct xfrm_state *x, | |
937 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
938 | unsigned short family) | |
939 | { | |
940 | switch (family) { | |
941 | case AF_INET: | |
942 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
943 | case AF_INET6: | |
944 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
945 | } | |
946 | return 0; | |
947 | } | |
948 | ||
e53820de MN |
949 | static __inline__ int |
950 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
951 | unsigned short family) | |
952 | { | |
953 | switch (family) { | |
954 | case AF_INET: | |
955 | return __xfrm4_state_addr_check(x, | |
956 | (xfrm_address_t *)&fl->fl4_dst, | |
957 | (xfrm_address_t *)&fl->fl4_src); | |
958 | case AF_INET6: | |
959 | return __xfrm6_state_addr_check(x, | |
960 | (xfrm_address_t *)&fl->fl6_dst, | |
961 | (xfrm_address_t *)&fl->fl6_src); | |
962 | } | |
963 | return 0; | |
964 | } | |
965 | ||
1da177e4 LT |
966 | static inline int xfrm_state_kern(struct xfrm_state *x) |
967 | { | |
968 | return atomic_read(&x->tunnel_users); | |
969 | } | |
970 | ||
5794708f MN |
971 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
972 | { | |
dc00a525 MN |
973 | return (!userproto || proto == userproto || |
974 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
975 | proto == IPPROTO_ESP || | |
976 | proto == IPPROTO_COMP))); | |
5794708f MN |
977 | } |
978 | ||
1da177e4 LT |
979 | /* |
980 | * xfrm algorithm information | |
981 | */ | |
982 | struct xfrm_algo_auth_info { | |
983 | u16 icv_truncbits; | |
984 | u16 icv_fullbits; | |
985 | }; | |
986 | ||
987 | struct xfrm_algo_encr_info { | |
988 | u16 blockbits; | |
989 | u16 defkeybits; | |
990 | }; | |
991 | ||
992 | struct xfrm_algo_comp_info { | |
993 | u16 threshold; | |
994 | }; | |
995 | ||
996 | struct xfrm_algo_desc { | |
997 | char *name; | |
04ff1260 | 998 | char *compat; |
1da177e4 LT |
999 | u8 available:1; |
1000 | union { | |
1001 | struct xfrm_algo_auth_info auth; | |
1002 | struct xfrm_algo_encr_info encr; | |
1003 | struct xfrm_algo_comp_info comp; | |
1004 | } uinfo; | |
1005 | struct sadb_alg desc; | |
1006 | }; | |
1007 | ||
1008 | /* XFRM tunnel handlers. */ | |
1009 | struct xfrm_tunnel { | |
1010 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
1011 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
1012 | ||
1013 | struct xfrm_tunnel *next; | |
1014 | int priority; | |
1da177e4 LT |
1015 | }; |
1016 | ||
1017 | struct xfrm6_tunnel { | |
d2acc347 HX |
1018 | int (*handler)(struct sk_buff *skb); |
1019 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 1020 | int type, int code, int offset, __be32 info); |
d2acc347 HX |
1021 | struct xfrm6_tunnel *next; |
1022 | int priority; | |
1da177e4 LT |
1023 | }; |
1024 | ||
1025 | extern void xfrm_init(void); | |
1026 | extern void xfrm4_init(void); | |
1027 | extern void xfrm6_init(void); | |
1028 | extern void xfrm6_fini(void); | |
1029 | extern void xfrm_state_init(void); | |
1030 | extern void xfrm4_state_init(void); | |
1da177e4 LT |
1031 | extern void xfrm6_state_init(void); |
1032 | extern void xfrm6_state_fini(void); | |
1033 | ||
1034 | extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *); | |
1035 | extern struct xfrm_state *xfrm_state_alloc(void); | |
1036 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1037 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
1038 | struct xfrm_policy *pol, int *err, | |
1039 | unsigned short family); | |
628529b6 JHS |
1040 | extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, |
1041 | xfrm_address_t *saddr, | |
1042 | unsigned short family, | |
1043 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1044 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1045 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1046 | extern int xfrm_state_add(struct xfrm_state *x); | |
1047 | extern int xfrm_state_update(struct xfrm_state *x); | |
a94cfd19 | 1048 | extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
eb2971b6 | 1049 | extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); |
41a49cc3 MN |
1050 | #ifdef CONFIG_XFRM_SUB_POLICY |
1051 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1052 | int n, unsigned short family); | |
1053 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1054 | int n, unsigned short family); | |
1055 | #else | |
1056 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1057 | int n, unsigned short family) | |
1058 | { | |
1059 | return -ENOSYS; | |
1060 | } | |
1061 | ||
1062 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1063 | int n, unsigned short family) | |
1064 | { | |
1065 | return -ENOSYS; | |
1066 | } | |
1067 | #endif | |
af11e316 JHS |
1068 | |
1069 | struct xfrmk_sadinfo { | |
1070 | u32 sadhcnt; /* current hash bkts */ | |
1071 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1072 | u32 sadcnt; /* current running count */ | |
1073 | }; | |
1074 | ||
5a6d3416 JHS |
1075 | struct xfrmk_spdinfo { |
1076 | u32 incnt; | |
1077 | u32 outcnt; | |
1078 | u32 fwdcnt; | |
1079 | u32 inscnt; | |
1080 | u32 outscnt; | |
1081 | u32 fwdscnt; | |
1082 | u32 spdhcnt; | |
1083 | u32 spdhmcnt; | |
1084 | }; | |
1085 | ||
1da177e4 | 1086 | extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); |
26b15dad | 1087 | extern int xfrm_state_delete(struct xfrm_state *x); |
4aa2e62c | 1088 | extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); |
af11e316 | 1089 | extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
5a6d3416 | 1090 | extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
a252cc23 | 1091 | extern int xfrm_replay_check(struct xfrm_state *x, __be32 seq); |
61f4627b | 1092 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1093 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1094 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1095 | extern int xfrm_init_state(struct xfrm_state *x); |
406ef77c | 1096 | extern int xfrm_output(struct sk_buff *skb); |
36cf9acf | 1097 | extern int xfrm4_extract_header(struct sk_buff *skb); |
c4541b41 HX |
1098 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1099 | int encap_type); | |
1da177e4 | 1100 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1101 | |
1102 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1103 | { | |
1104 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1105 | } | |
1106 | ||
36cf9acf HX |
1107 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1108 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1109 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1110 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1111 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
36cf9acf | 1112 | extern int xfrm6_extract_header(struct sk_buff *skb); |
33b5ecb8 | 1113 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
e5bbef20 | 1114 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1115 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1116 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1117 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1118 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
8c689a6e | 1119 | extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); |
1da177e4 | 1120 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
8c689a6e | 1121 | extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); |
36cf9acf HX |
1122 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1123 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1124 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1125 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1126 | u8 **prevhdr); | |
1da177e4 LT |
1127 | |
1128 | #ifdef CONFIG_XFRM | |
067b207b | 1129 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1130 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1131 | #else |
1132 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1133 | { | |
1134 | return -ENOPROTOOPT; | |
1135 | } | |
1136 | ||
067b207b | 1137 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1138 | { |
1139 | /* should not happen */ | |
1140 | kfree_skb(skb); | |
1141 | return 0; | |
1142 | } | |
1da177e4 LT |
1143 | #endif |
1144 | ||
dd0fc66f | 1145 | struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); |
4e81bb83 | 1146 | extern int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*), void *); |
1da177e4 | 1147 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4e81bb83 MN |
1148 | struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
1149 | struct xfrm_selector *sel, | |
ef41aaa0 EP |
1150 | struct xfrm_sec_ctx *ctx, int delete, |
1151 | int *err); | |
1152 | struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); | |
4aa2e62c | 1153 | int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1154 | u32 xfrm_get_acqseq(void); |
658b219e | 1155 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
161a09e7 JL |
1156 | struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1157 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 | 1158 | int create, unsigned short family); |
4aa2e62c | 1159 | extern int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1160 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
5b368e61 VY |
1161 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
1162 | struct flowi *fl, int family, int strict); | |
1da177e4 | 1163 | |
80c9abaa SS |
1164 | #ifdef CONFIG_XFRM_MIGRATE |
1165 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1166 | struct xfrm_migrate *m, int num_bundles); | |
1167 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); | |
1168 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1169 | struct xfrm_migrate *m); | |
1170 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1171 | struct xfrm_migrate *m, int num_bundles); | |
1172 | #endif | |
1173 | ||
1da177e4 | 1174 | extern wait_queue_head_t km_waitq; |
5d36b180 | 1175 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1176 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
97a64b45 | 1177 | extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1178 | |
1179 | extern void xfrm_input_init(void); | |
6067b2ba | 1180 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1181 | |
1182 | extern void xfrm_probe_algs(void); | |
1183 | extern int xfrm_count_auth_supported(void); | |
1184 | extern int xfrm_count_enc_supported(void); | |
1185 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1186 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1187 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1188 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1189 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1190 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1191 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1192 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1193 | ||
07d4ee58 | 1194 | struct hash_desc; |
9409f38a | 1195 | struct scatterlist; |
07d4ee58 HX |
1196 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1197 | unsigned int); | |
1da177e4 | 1198 | |
07d4ee58 HX |
1199 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1200 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1201 | |
1202 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1203 | int family) | |
1204 | { | |
1205 | switch (family) { | |
1206 | default: | |
1207 | case AF_INET: | |
8c689a6e | 1208 | return (__force __u32)a->a4 - (__force __u32)b->a4; |
1da177e4 LT |
1209 | case AF_INET6: |
1210 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1211 | (struct in6_addr *)b); | |
1212 | } | |
1213 | } | |
1214 | ||
77d8d7a6 HX |
1215 | static inline int xfrm_policy_id2dir(u32 index) |
1216 | { | |
1217 | return index & 7; | |
1218 | } | |
1219 | ||
f8cd5488 JHS |
1220 | static inline int xfrm_aevent_is_on(void) |
1221 | { | |
be33690d PM |
1222 | struct sock *nlsk; |
1223 | int ret = 0; | |
1224 | ||
1225 | rcu_read_lock(); | |
1226 | nlsk = rcu_dereference(xfrm_nl); | |
1227 | if (nlsk) | |
1228 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1229 | rcu_read_unlock(); | |
1230 | return ret; | |
f8cd5488 JHS |
1231 | } |
1232 | ||
0f99be0d ED |
1233 | static inline int xfrm_alg_len(struct xfrm_algo *alg) |
1234 | { | |
1235 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1236 | } | |
1237 | ||
80c9abaa SS |
1238 | #ifdef CONFIG_XFRM_MIGRATE |
1239 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1240 | { | |
0f99be0d | 1241 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1242 | } |
1243 | ||
1244 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1245 | { | |
1246 | int i; | |
1247 | for (i = 0; i < n; i++) | |
1248 | xfrm_state_put(*(states + i)); | |
1249 | } | |
1250 | ||
1251 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1252 | { | |
1253 | int i; | |
1254 | for (i = 0; i < n; i++) | |
1255 | xfrm_state_delete(*(states + i)); | |
1256 | } | |
1257 | #endif | |
f8cd5488 | 1258 | |
1da177e4 | 1259 | #endif /* _NET_XFRM_H */ |