Commit | Line | Data |
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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> | |
558f82ef MN |
22 | #ifdef CONFIG_XFRM_STATISTICS |
23 | #include <net/snmp.h> | |
24 | #endif | |
1da177e4 | 25 | |
d3d6dd3a MN |
26 | #define XFRM_PROTO_ESP 50 |
27 | #define XFRM_PROTO_AH 51 | |
28 | #define XFRM_PROTO_COMP 108 | |
29 | #define XFRM_PROTO_IPIP 4 | |
30 | #define XFRM_PROTO_IPV6 41 | |
31 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
32 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
33 | ||
1da177e4 | 34 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
35 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
36 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
37 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
38 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 39 | |
558f82ef MN |
40 | #ifdef CONFIG_XFRM_STATISTICS |
41 | DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics); | |
42 | #define XFRM_INC_STATS(field) SNMP_INC_STATS(xfrm_statistics, field) | |
43 | #define XFRM_INC_STATS_BH(field) SNMP_INC_STATS_BH(xfrm_statistics, field) | |
44 | #define XFRM_INC_STATS_USER(field) SNMP_INC_STATS_USER(xfrm_statistics, field) | |
45 | #else | |
46 | #define XFRM_INC_STATS(field) | |
47 | #define XFRM_INC_STATS_BH(field) | |
48 | #define XFRM_INC_STATS_USER(field) | |
49 | #endif | |
50 | ||
f8cd5488 JHS |
51 | extern struct sock *xfrm_nl; |
52 | extern u32 sysctl_xfrm_aevent_etime; | |
53 | extern u32 sysctl_xfrm_aevent_rseqth; | |
a37ae408 PE |
54 | extern int sysctl_xfrm_larval_drop; |
55 | extern u32 sysctl_xfrm_acq_expires; | |
f8cd5488 | 56 | |
4a3e2f71 | 57 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
58 | |
59 | /* Organization of SPD aka "XFRM rules" | |
60 | ------------------------------------ | |
61 | ||
62 | Basic objects: | |
63 | - policy rule, struct xfrm_policy (=SPD entry) | |
64 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
65 | - instance of a transformer, struct xfrm_state (=SA) | |
66 | - template to clone xfrm_state, struct xfrm_tmpl | |
67 | ||
68 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
69 | (To be compatible with existing pfkeyv2 implementations, | |
70 | many rules with priority of 0x7fffffff are allowed to exist and | |
71 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
72 | ||
73 | Lookup is plain linear search until the first match with selector. | |
74 | ||
75 | If "action" is "block", then we prohibit the flow, otherwise: | |
76 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
77 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
78 | described by templates xfrm_tmpl. Each template is resolved | |
79 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
80 | to a dst_entry returned to requestor. | |
81 | ||
82 | dst -. xfrm .-> xfrm_state #1 | |
83 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
84 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
85 | |---. child .-> NULL | |
86 | ||
87 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
88 | ||
89 | ||
90 | Resolution of xrfm_tmpl | |
91 | ----------------------- | |
92 | Template contains: | |
93 | 1. ->mode Mode: transport or tunnel | |
94 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
95 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
96 | Q: allow to resolve security gateway? | |
97 | 4. ->id.spi If not zero, static SPI. | |
98 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
99 | 6. ->algos List of allowed algos. Plain bitmask now. | |
100 | Q: ealgos, aalgos, calgos. What a mess... | |
101 | 7. ->share Sharing mode. | |
102 | Q: how to implement private sharing mode? To add struct sock* to | |
103 | flow id? | |
104 | ||
105 | Having this template we search through SAD searching for entries | |
106 | with appropriate mode/proto/algo, permitted by selector. | |
107 | If no appropriate entry found, it is requested from key manager. | |
108 | ||
109 | PROBLEMS: | |
110 | Q: How to find all the bundles referring to a physical path for | |
111 | PMTU discovery? Seems, dst should contain list of all parents... | |
112 | and enter to infinite locking hierarchy disaster. | |
113 | No! It is easier, we will not search for them, let them find us. | |
114 | We add genid to each dst plus pointer to genid of raw IP route, | |
115 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
116 | dst_check() will see this for top level and trigger resyncing | |
117 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
118 | */ | |
119 | ||
120 | /* Full description of state of transformer. */ | |
121 | struct xfrm_state | |
122 | { | |
123 | /* Note: bydst is re-used during gc */ | |
4c563f76 | 124 | struct list_head all; |
8f126e37 DM |
125 | struct hlist_node bydst; |
126 | struct hlist_node bysrc; | |
127 | struct hlist_node byspi; | |
1da177e4 LT |
128 | |
129 | atomic_t refcnt; | |
130 | spinlock_t lock; | |
131 | ||
132 | struct xfrm_id id; | |
133 | struct xfrm_selector sel; | |
134 | ||
9d4a706d DM |
135 | u32 genid; |
136 | ||
1da177e4 LT |
137 | /* Key manger bits */ |
138 | struct { | |
139 | u8 state; | |
140 | u8 dying; | |
141 | u32 seq; | |
142 | } km; | |
143 | ||
144 | /* Parameters of this state. */ | |
145 | struct { | |
146 | u32 reqid; | |
147 | u8 mode; | |
148 | u8 replay_window; | |
149 | u8 aalgo, ealgo, calgo; | |
150 | u8 flags; | |
151 | u16 family; | |
152 | xfrm_address_t saddr; | |
153 | int header_len; | |
154 | int trailer_len; | |
155 | } props; | |
156 | ||
157 | struct xfrm_lifetime_cfg lft; | |
158 | ||
159 | /* Data for transformer */ | |
160 | struct xfrm_algo *aalg; | |
161 | struct xfrm_algo *ealg; | |
162 | struct xfrm_algo *calg; | |
1a6509d9 | 163 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
164 | |
165 | /* Data for encapsulator */ | |
166 | struct xfrm_encap_tmpl *encap; | |
167 | ||
060f02a3 NT |
168 | /* Data for care-of address */ |
169 | xfrm_address_t *coaddr; | |
170 | ||
1da177e4 LT |
171 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
172 | struct xfrm_state *tunnel; | |
173 | ||
174 | /* If a tunnel, number of users + 1 */ | |
175 | atomic_t tunnel_users; | |
176 | ||
177 | /* State for replay detection */ | |
178 | struct xfrm_replay_state replay; | |
179 | ||
f8cd5488 JHS |
180 | /* Replay detection state at the time we sent the last notification */ |
181 | struct xfrm_replay_state preplay; | |
182 | ||
2717096a JHS |
183 | /* internal flag that only holds state for delayed aevent at the |
184 | * moment | |
185 | */ | |
186 | u32 xflags; | |
187 | ||
f8cd5488 JHS |
188 | /* Replay detection notification settings */ |
189 | u32 replay_maxage; | |
190 | u32 replay_maxdiff; | |
191 | ||
192 | /* Replay detection notification timer */ | |
193 | struct timer_list rtimer; | |
194 | ||
1da177e4 LT |
195 | /* Statistics */ |
196 | struct xfrm_stats stats; | |
197 | ||
198 | struct xfrm_lifetime_cur curlft; | |
199 | struct timer_list timer; | |
200 | ||
9afaca05 | 201 | /* Last used time */ |
d26f3984 | 202 | unsigned long lastused; |
9afaca05 | 203 | |
1da177e4 LT |
204 | /* Reference to data common to all the instances of this |
205 | * transformer. */ | |
533cb5b0 | 206 | const struct xfrm_type *type; |
13996378 | 207 | struct xfrm_mode *inner_mode; |
df9dcb45 | 208 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 209 | struct xfrm_mode *outer_mode; |
1da177e4 | 210 | |
df71837d TJ |
211 | /* Security context */ |
212 | struct xfrm_sec_ctx *security; | |
213 | ||
1da177e4 LT |
214 | /* Private data of this transformer, format is opaque, |
215 | * interpreted by xfrm_type methods. */ | |
216 | void *data; | |
217 | }; | |
218 | ||
2717096a JHS |
219 | /* xflags - make enum if more show up */ |
220 | #define XFRM_TIME_DEFER 1 | |
221 | ||
1da177e4 LT |
222 | enum { |
223 | XFRM_STATE_VOID, | |
224 | XFRM_STATE_ACQ, | |
225 | XFRM_STATE_VALID, | |
226 | XFRM_STATE_ERROR, | |
227 | XFRM_STATE_EXPIRED, | |
228 | XFRM_STATE_DEAD | |
229 | }; | |
230 | ||
26b15dad JHS |
231 | /* callback structure passed from either netlink or pfkey */ |
232 | struct km_event | |
233 | { | |
bf08867f HX |
234 | union { |
235 | u32 hard; | |
236 | u32 proto; | |
237 | u32 byid; | |
f8cd5488 | 238 | u32 aevent; |
f7b6983f | 239 | u32 type; |
bf08867f HX |
240 | } data; |
241 | ||
26b15dad JHS |
242 | u32 seq; |
243 | u32 pid; | |
244 | u32 event; | |
245 | }; | |
246 | ||
25ee3286 | 247 | struct net_device; |
1da177e4 LT |
248 | struct xfrm_type; |
249 | struct xfrm_dst; | |
250 | struct xfrm_policy_afinfo { | |
251 | unsigned short family; | |
1da177e4 LT |
252 | struct dst_ops *dst_ops; |
253 | void (*garbage_collect)(void); | |
66cdb3ca HX |
254 | struct dst_entry *(*dst_lookup)(int tos, xfrm_address_t *saddr, |
255 | xfrm_address_t *daddr); | |
a1e59abf | 256 | int (*get_saddr)(xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 257 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
1da177e4 | 258 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
259 | struct flowi *fl, |
260 | int reverse); | |
25ee3286 | 261 | int (*get_tos)(struct flowi *fl); |
a1b05140 MN |
262 | int (*init_path)(struct xfrm_dst *path, |
263 | struct dst_entry *dst, | |
264 | int nfheader_len); | |
25ee3286 HX |
265 | int (*fill_dst)(struct xfrm_dst *xdst, |
266 | struct net_device *dev); | |
1da177e4 LT |
267 | }; |
268 | ||
269 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
270 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
271 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
272 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
273 | |
274 | struct xfrm_tmpl; | |
980ebd25 | 275 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
276 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
277 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
278 | ||
1da177e4 | 279 | struct xfrm_state_afinfo { |
17c2a42a | 280 | unsigned int family; |
36cf9acf | 281 | unsigned int proto; |
8e3d716c | 282 | __be16 eth_proto; |
17c2a42a | 283 | struct module *owner; |
533cb5b0 | 284 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 285 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 286 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
287 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
288 | struct xfrm_tmpl *tmpl, | |
289 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
41a49cc3 MN |
290 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
291 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 292 | int (*output)(struct sk_buff *skb); |
227620e2 HX |
293 | int (*extract_input)(struct xfrm_state *x, |
294 | struct sk_buff *skb); | |
36cf9acf HX |
295 | int (*extract_output)(struct xfrm_state *x, |
296 | struct sk_buff *skb); | |
716062fd HX |
297 | int (*transport_finish)(struct sk_buff *skb, |
298 | int async); | |
1da177e4 LT |
299 | }; |
300 | ||
301 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
302 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
303 | ||
304 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
305 | ||
1da177e4 LT |
306 | struct xfrm_type |
307 | { | |
308 | char *description; | |
309 | struct module *owner; | |
310 | __u8 proto; | |
1b5c2299 MN |
311 | __u8 flags; |
312 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
436a0a40 | 313 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
314 | #define XFRM_TYPE_LOCAL_COADDR 4 |
315 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 316 | |
72cb6962 | 317 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 318 | void (*destructor)(struct xfrm_state *); |
e695633e | 319 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 320 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 321 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 322 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 323 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 324 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
325 | }; |
326 | ||
533cb5b0 ED |
327 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
328 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 329 | |
b59f45d0 | 330 | struct xfrm_mode { |
227620e2 HX |
331 | /* |
332 | * Remove encapsulation header. | |
333 | * | |
334 | * The IP header will be moved over the top of the encapsulation | |
335 | * header. | |
336 | * | |
337 | * On entry, the transport header shall point to where the IP header | |
338 | * should be and the network header shall be set to where the IP | |
339 | * header currently is. skb->data shall point to the start of the | |
340 | * payload. | |
341 | */ | |
342 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
343 | ||
344 | /* | |
345 | * This is the actual input entry point. | |
346 | * | |
347 | * For transport mode and equivalent this would be identical to | |
348 | * input2 (which does not need to be set). While tunnel mode | |
349 | * and equivalent would set this to the tunnel encapsulation function | |
350 | * xfrm4_prepare_input that would in turn call input2. | |
351 | */ | |
b59f45d0 | 352 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
353 | |
354 | /* | |
355 | * Add encapsulation header. | |
356 | * | |
357 | * On exit, the transport header will be set to the start of the | |
358 | * encapsulation header to be filled in by x->type->output and | |
359 | * the mac header will be set to the nextheader (protocol for | |
360 | * IPv4) field of the extension header directly preceding the | |
361 | * encapsulation header, or in its absence, that of the top IP | |
362 | * header. The value of the network header will always point | |
363 | * to the top IP header while skb->data will point to the payload. | |
364 | */ | |
36cf9acf HX |
365 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
366 | ||
367 | /* | |
368 | * This is the actual output entry point. | |
369 | * | |
370 | * For transport mode and equivalent this would be identical to | |
371 | * output2 (which does not need to be set). While tunnel mode | |
372 | * and equivalent would set this to a tunnel encapsulation function | |
373 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
374 | * call output2. | |
375 | */ | |
376 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 377 | |
17c2a42a | 378 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
379 | struct module *owner; |
380 | unsigned int encap; | |
1bfcb10f HX |
381 | int flags; |
382 | }; | |
383 | ||
384 | /* Flags for xfrm_mode. */ | |
385 | enum { | |
386 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
387 | }; |
388 | ||
389 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
390 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 391 | |
df9dcb45 KM |
392 | static inline int xfrm_af2proto(unsigned int family) |
393 | { | |
394 | switch(family) { | |
395 | case AF_INET: | |
396 | return IPPROTO_IPIP; | |
397 | case AF_INET6: | |
398 | return IPPROTO_IPV6; | |
399 | default: | |
400 | return 0; | |
401 | } | |
402 | } | |
403 | ||
404 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
405 | { | |
406 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
407 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
408 | return x->inner_mode; | |
409 | else | |
410 | return x->inner_mode_iaf; | |
411 | } | |
412 | ||
1da177e4 LT |
413 | struct xfrm_tmpl |
414 | { | |
415 | /* id in template is interpreted as: | |
416 | * daddr - destination of tunnel, may be zero for transport mode. | |
417 | * spi - zero to acquire spi. Not zero if spi is static, then | |
418 | * daddr must be fixed too. | |
419 | * proto - AH/ESP/IPCOMP | |
420 | */ | |
421 | struct xfrm_id id; | |
422 | ||
423 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
424 | xfrm_address_t saddr; | |
425 | ||
76b3f055 MK |
426 | unsigned short encap_family; |
427 | ||
1da177e4 LT |
428 | __u32 reqid; |
429 | ||
7e49e6de | 430 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
431 | __u8 mode; |
432 | ||
433 | /* Sharing mode: unique, this session only, this user only etc. */ | |
434 | __u8 share; | |
435 | ||
436 | /* May skip this transfomration if no SA is found */ | |
437 | __u8 optional; | |
438 | ||
c5d18e98 HX |
439 | /* Skip aalgos/ealgos/calgos checks. */ |
440 | __u8 allalgs; | |
441 | ||
1da177e4 LT |
442 | /* Bit mask of algos allowed for acquisition */ |
443 | __u32 aalgos; | |
444 | __u32 ealgos; | |
445 | __u32 calgos; | |
446 | }; | |
447 | ||
622dc828 | 448 | #define XFRM_MAX_DEPTH 6 |
1da177e4 LT |
449 | |
450 | struct xfrm_policy | |
451 | { | |
452 | struct xfrm_policy *next; | |
4c563f76 | 453 | struct list_head bytype; |
2518c7c2 DM |
454 | struct hlist_node bydst; |
455 | struct hlist_node byidx; | |
1da177e4 LT |
456 | |
457 | /* This lock only affects elements except for entry. */ | |
458 | rwlock_t lock; | |
459 | atomic_t refcnt; | |
460 | struct timer_list timer; | |
461 | ||
462 | u32 priority; | |
463 | u32 index; | |
464 | struct xfrm_selector selector; | |
465 | struct xfrm_lifetime_cfg lft; | |
466 | struct xfrm_lifetime_cur curlft; | |
467 | struct dst_entry *bundles; | |
46ca5f5d ACM |
468 | u16 family; |
469 | u8 type; | |
470 | u8 action; | |
471 | u8 flags; | |
472 | u8 dead; | |
473 | u8 xfrm_nr; | |
474 | /* XXX 1 byte hole, try to pack */ | |
df71837d | 475 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
476 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
477 | }; | |
478 | ||
80c9abaa SS |
479 | struct xfrm_migrate { |
480 | xfrm_address_t old_daddr; | |
481 | xfrm_address_t old_saddr; | |
482 | xfrm_address_t new_daddr; | |
483 | xfrm_address_t new_saddr; | |
484 | u8 proto; | |
485 | u8 mode; | |
486 | u16 reserved; | |
487 | u32 reqid; | |
488 | u16 old_family; | |
489 | u16 new_family; | |
490 | }; | |
491 | ||
f8cd5488 JHS |
492 | #define XFRM_KM_TIMEOUT 30 |
493 | /* which seqno */ | |
494 | #define XFRM_REPLAY_SEQ 1 | |
495 | #define XFRM_REPLAY_OSEQ 2 | |
496 | #define XFRM_REPLAY_SEQ_MASK 3 | |
497 | /* what happened */ | |
498 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
499 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
500 | ||
501 | /* default aevent timeout in units of 100ms */ | |
502 | #define XFRM_AE_ETIME 10 | |
503 | /* Async Event timer multiplier */ | |
504 | #define XFRM_AE_ETH_M 10 | |
505 | /* default seq threshold size */ | |
506 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
507 | |
508 | struct xfrm_mgr | |
509 | { | |
510 | struct list_head list; | |
511 | char *id; | |
26b15dad | 512 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 513 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 514 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 515 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 516 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
97a64b45 | 517 | int (*report)(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
80c9abaa | 518 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles); |
1da177e4 LT |
519 | }; |
520 | ||
521 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
522 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
523 | ||
2518c7c2 | 524 | extern unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2]; |
1da177e4 | 525 | |
436a0a40 HX |
526 | /* |
527 | * This structure is used for the duration where packets are being | |
528 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
529 | * area beyond the generic IP part may be overwritten. | |
530 | */ | |
531 | struct xfrm_skb_cb { | |
532 | union { | |
533 | struct inet_skb_parm h4; | |
534 | struct inet6_skb_parm h6; | |
535 | } header; | |
536 | ||
537 | /* Sequence number for replay protection. */ | |
b318e0e4 HX |
538 | union { |
539 | u64 output; | |
540 | __be32 input; | |
541 | } seq; | |
436a0a40 HX |
542 | }; |
543 | ||
544 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
545 | ||
36cf9acf HX |
546 | /* |
547 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
548 | * to transmit header information to the mode input/output functions. | |
549 | */ | |
550 | struct xfrm_mode_skb_cb { | |
551 | union { | |
552 | struct inet_skb_parm h4; | |
553 | struct inet6_skb_parm h6; | |
554 | } header; | |
555 | ||
556 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
557 | __be16 id; | |
558 | __be16 frag_off; | |
559 | ||
732c8bd5 HX |
560 | /* IP header length (excluding options or extension headers). */ |
561 | u8 ihl; | |
562 | ||
36cf9acf HX |
563 | /* TOS for IPv4, class for IPv6. */ |
564 | u8 tos; | |
565 | ||
566 | /* TTL for IPv4, hop limitfor IPv6. */ | |
567 | u8 ttl; | |
568 | ||
569 | /* Protocol for IPv4, NH for IPv6. */ | |
570 | u8 protocol; | |
571 | ||
732c8bd5 HX |
572 | /* Option length for IPv4, zero for IPv6. */ |
573 | u8 optlen; | |
574 | ||
36cf9acf HX |
575 | /* Used by IPv6 only, zero for IPv4. */ |
576 | u8 flow_lbl[3]; | |
577 | }; | |
578 | ||
579 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
580 | ||
716062fd HX |
581 | /* |
582 | * This structure is used by the input processing to locate the SPI and | |
583 | * related information. | |
584 | */ | |
585 | struct xfrm_spi_skb_cb { | |
586 | union { | |
587 | struct inet_skb_parm h4; | |
588 | struct inet6_skb_parm h6; | |
589 | } header; | |
590 | ||
716062fd | 591 | unsigned int daddroff; |
2fcb45b6 | 592 | unsigned int family; |
716062fd HX |
593 | }; |
594 | ||
595 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
596 | ||
161a09e7 JL |
597 | /* Audit Information */ |
598 | struct xfrm_audit | |
599 | { | |
161a09e7 | 600 | u32 secid; |
2532386f EP |
601 | uid_t loginuid; |
602 | u32 sessionid; | |
161a09e7 | 603 | }; |
c9204d9c JL |
604 | |
605 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 606 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
607 | { |
608 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 609 | |
afeb14b4 PM |
610 | if (audit_enabled == 0) |
611 | return NULL; | |
ab5f5e8b | 612 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 613 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
614 | if (audit_buf == NULL) |
615 | return NULL; | |
afeb14b4 PM |
616 | audit_log_format(audit_buf, "op=%s", op); |
617 | return audit_buf; | |
618 | } | |
ab5f5e8b | 619 | |
2532386f | 620 | static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, |
afeb14b4 PM |
621 | struct audit_buffer *audit_buf) |
622 | { | |
623 | char *secctx; | |
624 | u32 secctx_len; | |
ab5f5e8b | 625 | |
2532386f | 626 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
68277acc PM |
627 | if (secid != 0 && |
628 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
629 | audit_log_format(audit_buf, " subj=%s", secctx); |
630 | security_release_secctx(secctx, secctx_len); | |
631 | } else | |
632 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
633 | } |
634 | ||
635 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2532386f | 636 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 637 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
2532386f | 638 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 639 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2532386f | 640 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 641 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2532386f | 642 | u32 auid, u32 ses, u32 secid); |
afeb14b4 PM |
643 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
644 | struct sk_buff *skb); | |
645 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
646 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
647 | __be32 net_spi, __be32 net_seq); | |
648 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
649 | struct sk_buff *skb, u8 proto); | |
c9204d9c | 650 | #else |
2532386f EP |
651 | #define xfrm_audit_policy_add(x, r, a, se, s) do { ; } while (0) |
652 | #define xfrm_audit_policy_delete(x, r, a, se, s) do { ; } while (0) | |
653 | #define xfrm_audit_state_add(x, r, a, se, s) do { ; } while (0) | |
654 | #define xfrm_audit_state_delete(x, r, a, se, s) do { ; } while (0) | |
afeb14b4 PM |
655 | #define xfrm_audit_state_replay_overflow(x, s) do { ; } while (0) |
656 | #define xfrm_audit_state_notfound_simple(s, f) do { ; } while (0) | |
657 | #define xfrm_audit_state_notfound(s, f, sp, sq) do { ; } while (0) | |
658 | #define xfrm_audit_state_icvfail(x, s, p) do { ; } while (0) | |
c9204d9c | 659 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 660 | |
1da177e4 LT |
661 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
662 | { | |
663 | if (likely(policy != NULL)) | |
664 | atomic_inc(&policy->refcnt); | |
665 | } | |
666 | ||
64c31b3f | 667 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
668 | |
669 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
670 | { | |
671 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 672 | xfrm_policy_destroy(policy); |
1da177e4 LT |
673 | } |
674 | ||
4e81bb83 MN |
675 | #ifdef CONFIG_XFRM_SUB_POLICY |
676 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
677 | { | |
678 | int i; | |
679 | for (i = npols - 1; i >= 0; --i) | |
680 | xfrm_pol_put(pols[i]); | |
681 | } | |
682 | #else | |
683 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
684 | { | |
685 | xfrm_pol_put(pols[0]); | |
686 | } | |
687 | #endif | |
688 | ||
1da177e4 LT |
689 | extern void __xfrm_state_destroy(struct xfrm_state *); |
690 | ||
21380b81 HX |
691 | static inline void __xfrm_state_put(struct xfrm_state *x) |
692 | { | |
693 | atomic_dec(&x->refcnt); | |
694 | } | |
695 | ||
1da177e4 LT |
696 | static inline void xfrm_state_put(struct xfrm_state *x) |
697 | { | |
698 | if (atomic_dec_and_test(&x->refcnt)) | |
699 | __xfrm_state_destroy(x); | |
700 | } | |
701 | ||
702 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
703 | { | |
704 | atomic_inc(&x->refcnt); | |
705 | } | |
706 | ||
707 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
708 | { | |
5f19343f AV |
709 | __be32 *a1 = token1; |
710 | __be32 *a2 = token2; | |
1da177e4 LT |
711 | int pdw; |
712 | int pbi; | |
713 | ||
714 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
715 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
716 | ||
717 | if (pdw) | |
718 | if (memcmp(a1, a2, pdw << 2)) | |
719 | return 0; | |
720 | ||
721 | if (pbi) { | |
5f19343f | 722 | __be32 mask; |
1da177e4 LT |
723 | |
724 | mask = htonl((0xffffffff) << (32 - pbi)); | |
725 | ||
726 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
727 | return 0; | |
728 | } | |
729 | ||
730 | return 1; | |
731 | } | |
732 | ||
733 | static __inline__ | |
f9d07e41 | 734 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 735 | { |
f9d07e41 | 736 | __be16 port; |
1da177e4 LT |
737 | switch(fl->proto) { |
738 | case IPPROTO_TCP: | |
739 | case IPPROTO_UDP: | |
ba4e58ec | 740 | case IPPROTO_UDPLITE: |
1da177e4 LT |
741 | case IPPROTO_SCTP: |
742 | port = fl->fl_ip_sport; | |
743 | break; | |
744 | case IPPROTO_ICMP: | |
745 | case IPPROTO_ICMPV6: | |
746 | port = htons(fl->fl_icmp_type); | |
747 | break; | |
2ce4272a MN |
748 | case IPPROTO_MH: |
749 | port = htons(fl->fl_mh_type); | |
750 | break; | |
1da177e4 LT |
751 | default: |
752 | port = 0; /*XXX*/ | |
753 | } | |
754 | return port; | |
755 | } | |
756 | ||
757 | static __inline__ | |
f9d07e41 | 758 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 759 | { |
f9d07e41 | 760 | __be16 port; |
1da177e4 LT |
761 | switch(fl->proto) { |
762 | case IPPROTO_TCP: | |
763 | case IPPROTO_UDP: | |
ba4e58ec | 764 | case IPPROTO_UDPLITE: |
1da177e4 LT |
765 | case IPPROTO_SCTP: |
766 | port = fl->fl_ip_dport; | |
767 | break; | |
768 | case IPPROTO_ICMP: | |
769 | case IPPROTO_ICMPV6: | |
770 | port = htons(fl->fl_icmp_code); | |
771 | break; | |
772 | default: | |
773 | port = 0; /*XXX*/ | |
774 | } | |
775 | return port; | |
776 | } | |
777 | ||
77681021 AM |
778 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
779 | unsigned short family); | |
1da177e4 | 780 | |
df71837d TJ |
781 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
782 | /* If neither has a context --> match | |
783 | * Otherwise, both must have a context and the sids, doi, alg must match | |
784 | */ | |
785 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
786 | { | |
787 | return ((!s1 && !s2) || | |
788 | (s1 && s2 && | |
789 | (s1->ctx_sid == s2->ctx_sid) && | |
790 | (s1->ctx_doi == s2->ctx_doi) && | |
791 | (s1->ctx_alg == s2->ctx_alg))); | |
792 | } | |
793 | #else | |
794 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
795 | { | |
796 | return 1; | |
797 | } | |
798 | #endif | |
799 | ||
1da177e4 LT |
800 | /* A struct encoding bundle of transformations to apply to some set of flow. |
801 | * | |
802 | * dst->child points to the next element of bundle. | |
803 | * dst->xfrm points to an instanse of transformer. | |
804 | * | |
805 | * Due to unfortunate limitations of current routing cache, which we | |
806 | * have no time to fix, it mirrors struct rtable and bound to the same | |
807 | * routing key, including saddr,daddr. However, we can have many of | |
808 | * bundles differing by session id. All the bundles grow from a parent | |
809 | * policy rule. | |
810 | */ | |
811 | struct xfrm_dst | |
812 | { | |
813 | union { | |
1da177e4 LT |
814 | struct dst_entry dst; |
815 | struct rtable rt; | |
816 | struct rt6_info rt6; | |
817 | } u; | |
818 | struct dst_entry *route; | |
157bfc25 MN |
819 | #ifdef CONFIG_XFRM_SUB_POLICY |
820 | struct flowi *origin; | |
821 | struct xfrm_selector *partner; | |
822 | #endif | |
9d4a706d | 823 | u32 genid; |
1da177e4 LT |
824 | u32 route_mtu_cached; |
825 | u32 child_mtu_cached; | |
92d63dec HY |
826 | u32 route_cookie; |
827 | u32 path_cookie; | |
1da177e4 LT |
828 | }; |
829 | ||
aabc9761 HX |
830 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
831 | { | |
832 | dst_release(xdst->route); | |
833 | if (likely(xdst->u.dst.xfrm)) | |
834 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
835 | #ifdef CONFIG_XFRM_SUB_POLICY |
836 | kfree(xdst->origin); | |
837 | xdst->origin = NULL; | |
838 | kfree(xdst->partner); | |
839 | xdst->partner = NULL; | |
840 | #endif | |
aabc9761 HX |
841 | } |
842 | ||
843 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
844 | ||
1da177e4 LT |
845 | struct sec_path |
846 | { | |
847 | atomic_t refcnt; | |
848 | int len; | |
dbe5b4aa | 849 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
850 | }; |
851 | ||
852 | static inline struct sec_path * | |
853 | secpath_get(struct sec_path *sp) | |
854 | { | |
855 | if (sp) | |
856 | atomic_inc(&sp->refcnt); | |
857 | return sp; | |
858 | } | |
859 | ||
860 | extern void __secpath_destroy(struct sec_path *sp); | |
861 | ||
862 | static inline void | |
863 | secpath_put(struct sec_path *sp) | |
864 | { | |
865 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
866 | __secpath_destroy(sp); | |
867 | } | |
868 | ||
869 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
870 | ||
871 | static inline void | |
872 | secpath_reset(struct sk_buff *skb) | |
873 | { | |
874 | #ifdef CONFIG_XFRM | |
875 | secpath_put(skb->sp); | |
876 | skb->sp = NULL; | |
877 | #endif | |
878 | } | |
879 | ||
a1e59abf PM |
880 | static inline int |
881 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
882 | { | |
883 | switch (family) { | |
884 | case AF_INET: | |
885 | return addr->a4 == 0; | |
886 | case AF_INET6: | |
887 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
888 | } | |
889 | return 0; | |
890 | } | |
891 | ||
1da177e4 LT |
892 | static inline int |
893 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
894 | { | |
895 | return (tmpl->saddr.a4 && | |
896 | tmpl->saddr.a4 != x->props.saddr.a4); | |
897 | } | |
898 | ||
899 | static inline int | |
900 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
901 | { | |
902 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
903 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
904 | } | |
905 | ||
906 | static inline int | |
907 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
908 | { | |
909 | switch (family) { | |
910 | case AF_INET: | |
911 | return __xfrm4_state_addr_cmp(tmpl, x); | |
912 | case AF_INET6: | |
913 | return __xfrm6_state_addr_cmp(tmpl, x); | |
914 | } | |
915 | return !0; | |
916 | } | |
917 | ||
918 | #ifdef CONFIG_XFRM | |
1da177e4 LT |
919 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
920 | ||
d5422efe HX |
921 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
922 | struct sk_buff *skb, | |
923 | unsigned int family, int reverse) | |
1da177e4 | 924 | { |
d5422efe HX |
925 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
926 | ||
1da177e4 | 927 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 928 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 929 | |
2518c7c2 | 930 | return (!xfrm_policy_count[dir] && !skb->sp) || |
1da177e4 | 931 | (skb->dst->flags & DST_NOPOLICY) || |
d5422efe HX |
932 | __xfrm_policy_check(sk, ndir, skb, family); |
933 | } | |
934 | ||
935 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
936 | { | |
937 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
938 | } |
939 | ||
940 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
941 | { | |
942 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
943 | } | |
944 | ||
945 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
946 | { | |
947 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
948 | } | |
949 | ||
d5422efe HX |
950 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
951 | struct sk_buff *skb) | |
952 | { | |
953 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
954 | } | |
955 | ||
956 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
957 | struct sk_buff *skb) | |
958 | { | |
959 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
960 | } | |
961 | ||
962 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
963 | unsigned int family, int reverse); | |
964 | ||
965 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
966 | unsigned int family) | |
967 | { | |
968 | return __xfrm_decode_session(skb, fl, family, 0); | |
969 | } | |
970 | ||
971 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
972 | struct flowi *fl, | |
973 | unsigned int family) | |
974 | { | |
975 | return __xfrm_decode_session(skb, fl, family, 1); | |
976 | } | |
977 | ||
1da177e4 LT |
978 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
979 | ||
980 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
981 | { | |
2518c7c2 | 982 | return !xfrm_policy_count[XFRM_POLICY_OUT] || |
1da177e4 LT |
983 | (skb->dst->flags & DST_NOXFRM) || |
984 | __xfrm_route_forward(skb, family); | |
985 | } | |
986 | ||
987 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
988 | { | |
989 | return xfrm_route_forward(skb, AF_INET); | |
990 | } | |
991 | ||
992 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
993 | { | |
994 | return xfrm_route_forward(skb, AF_INET6); | |
995 | } | |
996 | ||
997 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
998 | ||
999 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1000 | { | |
1001 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1002 | return __xfrm_sk_clone_policy(sk); | |
1003 | return 0; | |
1004 | } | |
1005 | ||
4666faab | 1006 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1007 | |
1008 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1009 | { | |
1010 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1011 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1012 | sk->sk_policy[0] = NULL; | |
1013 | } | |
1014 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1015 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1016 | sk->sk_policy[1] = NULL; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | #else | |
1021 | ||
1022 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1023 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1024 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1025 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1026 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1027 | { | |
1028 | return 1; | |
1029 | } | |
1030 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1031 | { | |
1032 | return 1; | |
1033 | } | |
1034 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1035 | { | |
1036 | return 1; | |
1037 | } | |
d5422efe HX |
1038 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1039 | struct flowi *fl, | |
1040 | unsigned int family) | |
1041 | { | |
1042 | return -ENOSYS; | |
1043 | } | |
1044 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1045 | struct sk_buff *skb) | |
1046 | { | |
1047 | return 1; | |
1048 | } | |
1049 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1050 | struct sk_buff *skb) | |
1051 | { | |
1052 | return 1; | |
1053 | } | |
1da177e4 LT |
1054 | #endif |
1055 | ||
1056 | static __inline__ | |
1057 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
1058 | { | |
1059 | switch (family){ | |
1060 | case AF_INET: | |
1061 | return (xfrm_address_t *)&fl->fl4_dst; | |
1062 | case AF_INET6: | |
1063 | return (xfrm_address_t *)&fl->fl6_dst; | |
1064 | } | |
1065 | return NULL; | |
1066 | } | |
1067 | ||
1068 | static __inline__ | |
1069 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
1070 | { | |
1071 | switch (family){ | |
1072 | case AF_INET: | |
1073 | return (xfrm_address_t *)&fl->fl4_src; | |
1074 | case AF_INET6: | |
1075 | return (xfrm_address_t *)&fl->fl6_src; | |
1076 | } | |
1077 | return NULL; | |
1078 | } | |
1079 | ||
9bb182a7 YH |
1080 | static __inline__ |
1081 | void xfrm_flowi_addr_get(struct flowi *fl, | |
1082 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
1083 | unsigned short family) | |
1084 | { | |
1085 | switch(family) { | |
1086 | case AF_INET: | |
1087 | memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); | |
1088 | memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); | |
1089 | break; | |
1090 | case AF_INET6: | |
1091 | ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); | |
1092 | ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); | |
1093 | break; | |
1094 | } | |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | static __inline__ int |
1098 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
1099 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1100 | { | |
1101 | if (daddr->a4 == x->id.daddr.a4 && | |
1102 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1103 | return 1; | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | static __inline__ int | |
1108 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
1109 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1110 | { | |
1111 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
1112 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
1113 | ipv6_addr_any((struct in6_addr *)saddr) || | |
1114 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1115 | return 1; | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static __inline__ int | |
1120 | xfrm_state_addr_check(struct xfrm_state *x, | |
1121 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1122 | unsigned short family) | |
1123 | { | |
1124 | switch (family) { | |
1125 | case AF_INET: | |
1126 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1127 | case AF_INET6: | |
1128 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1129 | } | |
1130 | return 0; | |
1131 | } | |
1132 | ||
e53820de MN |
1133 | static __inline__ int |
1134 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
1135 | unsigned short family) | |
1136 | { | |
1137 | switch (family) { | |
1138 | case AF_INET: | |
1139 | return __xfrm4_state_addr_check(x, | |
1140 | (xfrm_address_t *)&fl->fl4_dst, | |
1141 | (xfrm_address_t *)&fl->fl4_src); | |
1142 | case AF_INET6: | |
1143 | return __xfrm6_state_addr_check(x, | |
1144 | (xfrm_address_t *)&fl->fl6_dst, | |
1145 | (xfrm_address_t *)&fl->fl6_src); | |
1146 | } | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1da177e4 LT |
1150 | static inline int xfrm_state_kern(struct xfrm_state *x) |
1151 | { | |
1152 | return atomic_read(&x->tunnel_users); | |
1153 | } | |
1154 | ||
5794708f MN |
1155 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1156 | { | |
dc00a525 MN |
1157 | return (!userproto || proto == userproto || |
1158 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1159 | proto == IPPROTO_ESP || | |
1160 | proto == IPPROTO_COMP))); | |
5794708f MN |
1161 | } |
1162 | ||
1da177e4 LT |
1163 | /* |
1164 | * xfrm algorithm information | |
1165 | */ | |
1a6509d9 HX |
1166 | struct xfrm_algo_aead_info { |
1167 | u16 icv_truncbits; | |
1168 | }; | |
1169 | ||
1da177e4 LT |
1170 | struct xfrm_algo_auth_info { |
1171 | u16 icv_truncbits; | |
1172 | u16 icv_fullbits; | |
1173 | }; | |
1174 | ||
1175 | struct xfrm_algo_encr_info { | |
1176 | u16 blockbits; | |
1177 | u16 defkeybits; | |
1178 | }; | |
1179 | ||
1180 | struct xfrm_algo_comp_info { | |
1181 | u16 threshold; | |
1182 | }; | |
1183 | ||
1184 | struct xfrm_algo_desc { | |
1185 | char *name; | |
04ff1260 | 1186 | char *compat; |
1da177e4 LT |
1187 | u8 available:1; |
1188 | union { | |
1a6509d9 | 1189 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1190 | struct xfrm_algo_auth_info auth; |
1191 | struct xfrm_algo_encr_info encr; | |
1192 | struct xfrm_algo_comp_info comp; | |
1193 | } uinfo; | |
1194 | struct sadb_alg desc; | |
1195 | }; | |
1196 | ||
1197 | /* XFRM tunnel handlers. */ | |
1198 | struct xfrm_tunnel { | |
1199 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
1200 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
1201 | ||
1202 | struct xfrm_tunnel *next; | |
1203 | int priority; | |
1da177e4 LT |
1204 | }; |
1205 | ||
1206 | struct xfrm6_tunnel { | |
d2acc347 HX |
1207 | int (*handler)(struct sk_buff *skb); |
1208 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 1209 | int type, int code, int offset, __be32 info); |
d2acc347 HX |
1210 | struct xfrm6_tunnel *next; |
1211 | int priority; | |
1da177e4 LT |
1212 | }; |
1213 | ||
4c563f76 TT |
1214 | struct xfrm_state_walk { |
1215 | struct xfrm_state *state; | |
1216 | int count; | |
1217 | u8 proto; | |
1218 | }; | |
1219 | ||
1220 | struct xfrm_policy_walk { | |
1221 | struct xfrm_policy *policy; | |
1222 | int count; | |
1223 | u8 type, cur_type; | |
1224 | }; | |
1225 | ||
1da177e4 LT |
1226 | extern void xfrm_init(void); |
1227 | extern void xfrm4_init(void); | |
1da177e4 LT |
1228 | extern void xfrm_state_init(void); |
1229 | extern void xfrm4_state_init(void); | |
c35b7e72 DL |
1230 | #ifdef CONFIG_XFRM |
1231 | extern int xfrm6_init(void); | |
1232 | extern void xfrm6_fini(void); | |
0013caba | 1233 | extern int xfrm6_state_init(void); |
1da177e4 | 1234 | extern void xfrm6_state_fini(void); |
c35b7e72 DL |
1235 | #else |
1236 | static inline int xfrm6_init(void) | |
1237 | { | |
1238 | return 0; | |
1239 | } | |
1240 | static inline void xfrm6_fini(void) | |
1241 | { | |
1242 | ; | |
1243 | } | |
1244 | #endif | |
1da177e4 | 1245 | |
558f82ef MN |
1246 | #ifdef CONFIG_XFRM_STATISTICS |
1247 | extern int xfrm_proc_init(void); | |
1248 | #endif | |
1249 | ||
4c563f76 TT |
1250 | static inline void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) |
1251 | { | |
1252 | walk->proto = proto; | |
1253 | walk->state = NULL; | |
1254 | walk->count = 0; | |
1255 | } | |
1256 | ||
1257 | static inline void xfrm_state_walk_done(struct xfrm_state_walk *walk) | |
1258 | { | |
1259 | if (walk->state != NULL) { | |
1260 | xfrm_state_put(walk->state); | |
1261 | walk->state = NULL; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | extern int xfrm_state_walk(struct xfrm_state_walk *walk, | |
1266 | int (*func)(struct xfrm_state *, int, void*), void *); | |
1da177e4 LT |
1267 | extern struct xfrm_state *xfrm_state_alloc(void); |
1268 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1269 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
1270 | struct xfrm_policy *pol, int *err, | |
1271 | unsigned short family); | |
628529b6 JHS |
1272 | extern struct xfrm_state * xfrm_stateonly_find(xfrm_address_t *daddr, |
1273 | xfrm_address_t *saddr, | |
1274 | unsigned short family, | |
1275 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1276 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1277 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1278 | extern int xfrm_state_add(struct xfrm_state *x); | |
1279 | extern int xfrm_state_update(struct xfrm_state *x); | |
a94cfd19 | 1280 | extern struct xfrm_state *xfrm_state_lookup(xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
eb2971b6 | 1281 | extern struct xfrm_state *xfrm_state_lookup_byaddr(xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); |
41a49cc3 MN |
1282 | #ifdef CONFIG_XFRM_SUB_POLICY |
1283 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1284 | int n, unsigned short family); | |
1285 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1286 | int n, unsigned short family); | |
1287 | #else | |
1288 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1289 | int n, unsigned short family) | |
1290 | { | |
1291 | return -ENOSYS; | |
1292 | } | |
1293 | ||
1294 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1295 | int n, unsigned short family) | |
1296 | { | |
1297 | return -ENOSYS; | |
1298 | } | |
1299 | #endif | |
af11e316 JHS |
1300 | |
1301 | struct xfrmk_sadinfo { | |
1302 | u32 sadhcnt; /* current hash bkts */ | |
1303 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1304 | u32 sadcnt; /* current running count */ | |
1305 | }; | |
1306 | ||
5a6d3416 JHS |
1307 | struct xfrmk_spdinfo { |
1308 | u32 incnt; | |
1309 | u32 outcnt; | |
1310 | u32 fwdcnt; | |
1311 | u32 inscnt; | |
1312 | u32 outscnt; | |
1313 | u32 fwdscnt; | |
1314 | u32 spdhcnt; | |
1315 | u32 spdhmcnt; | |
1316 | }; | |
1317 | ||
1da177e4 | 1318 | extern struct xfrm_state *xfrm_find_acq_byseq(u32 seq); |
26b15dad | 1319 | extern int xfrm_state_delete(struct xfrm_state *x); |
4aa2e62c | 1320 | extern int xfrm_state_flush(u8 proto, struct xfrm_audit *audit_info); |
af11e316 | 1321 | extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
5a6d3416 | 1322 | extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
afeb14b4 PM |
1323 | extern int xfrm_replay_check(struct xfrm_state *x, |
1324 | struct sk_buff *skb, __be32 seq); | |
61f4627b | 1325 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1326 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1327 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1328 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1329 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1330 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1331 | int encap_type); | |
1bf06cd2 | 1332 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1333 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1334 | extern int xfrm_output(struct sk_buff *skb); |
df9dcb45 | 1335 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
36cf9acf | 1336 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1337 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1338 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1339 | int encap_type); | |
716062fd | 1340 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1341 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1342 | |
1343 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1344 | { | |
1345 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1346 | } | |
1347 | ||
36cf9acf HX |
1348 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1349 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1350 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1351 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1352 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
36cf9acf | 1353 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1354 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1355 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1356 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1357 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1358 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1359 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1360 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1361 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
8c689a6e | 1362 | extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); |
1da177e4 | 1363 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
8c689a6e | 1364 | extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); |
36cf9acf HX |
1365 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1366 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1367 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1368 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1369 | u8 **prevhdr); | |
1da177e4 LT |
1370 | |
1371 | #ifdef CONFIG_XFRM | |
067b207b | 1372 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1373 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1374 | #else |
1375 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1376 | { | |
1377 | return -ENOPROTOOPT; | |
1378 | } | |
1379 | ||
067b207b | 1380 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1381 | { |
1382 | /* should not happen */ | |
1383 | kfree_skb(skb); | |
1384 | return 0; | |
1385 | } | |
1da177e4 LT |
1386 | #endif |
1387 | ||
dd0fc66f | 1388 | struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp); |
4c563f76 TT |
1389 | |
1390 | static inline void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type) | |
1391 | { | |
1392 | walk->cur_type = XFRM_POLICY_TYPE_MAIN; | |
1393 | walk->type = type; | |
1394 | walk->policy = NULL; | |
1395 | walk->count = 0; | |
1396 | } | |
1397 | ||
1398 | static inline void xfrm_policy_walk_done(struct xfrm_policy_walk *walk) | |
1399 | { | |
1400 | if (walk->policy != NULL) { | |
1401 | xfrm_pol_put(walk->policy); | |
1402 | walk->policy = NULL; | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | extern int xfrm_policy_walk(struct xfrm_policy_walk *walk, | |
1407 | int (*func)(struct xfrm_policy *, int, int, void*), void *); | |
1da177e4 | 1408 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
4e81bb83 MN |
1409 | struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir, |
1410 | struct xfrm_selector *sel, | |
ef41aaa0 EP |
1411 | struct xfrm_sec_ctx *ctx, int delete, |
1412 | int *err); | |
1413 | struct xfrm_policy *xfrm_policy_byid(u8, int dir, u32 id, int delete, int *err); | |
4aa2e62c | 1414 | int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1415 | u32 xfrm_get_acqseq(void); |
658b219e | 1416 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
161a09e7 JL |
1417 | struct xfrm_state * xfrm_find_acq(u8 mode, u32 reqid, u8 proto, |
1418 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1da177e4 | 1419 | int create, unsigned short family); |
1da177e4 | 1420 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
5b368e61 VY |
1421 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
1422 | struct flowi *fl, int family, int strict); | |
1da177e4 | 1423 | |
80c9abaa SS |
1424 | #ifdef CONFIG_XFRM_MIGRATE |
1425 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1426 | struct xfrm_migrate *m, int num_bundles); | |
1427 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); | |
1428 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1429 | struct xfrm_migrate *m); | |
1430 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
1431 | struct xfrm_migrate *m, int num_bundles); | |
1432 | #endif | |
1433 | ||
1da177e4 | 1434 | extern wait_queue_head_t km_waitq; |
5d36b180 | 1435 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1436 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
97a64b45 | 1437 | extern int km_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1438 | |
1439 | extern void xfrm_input_init(void); | |
6067b2ba | 1440 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1441 | |
1442 | extern void xfrm_probe_algs(void); | |
1443 | extern int xfrm_count_auth_supported(void); | |
1444 | extern int xfrm_count_enc_supported(void); | |
1445 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1446 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1447 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1448 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1449 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1450 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1451 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1452 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1a6509d9 HX |
1453 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, |
1454 | int probe); | |
1da177e4 | 1455 | |
07d4ee58 | 1456 | struct hash_desc; |
9409f38a | 1457 | struct scatterlist; |
07d4ee58 HX |
1458 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1459 | unsigned int); | |
1da177e4 | 1460 | |
07d4ee58 HX |
1461 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1462 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1463 | |
1464 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1465 | int family) | |
1466 | { | |
1467 | switch (family) { | |
1468 | default: | |
1469 | case AF_INET: | |
8c689a6e | 1470 | return (__force __u32)a->a4 - (__force __u32)b->a4; |
1da177e4 LT |
1471 | case AF_INET6: |
1472 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1473 | (struct in6_addr *)b); | |
1474 | } | |
1475 | } | |
1476 | ||
77d8d7a6 HX |
1477 | static inline int xfrm_policy_id2dir(u32 index) |
1478 | { | |
1479 | return index & 7; | |
1480 | } | |
1481 | ||
f8cd5488 JHS |
1482 | static inline int xfrm_aevent_is_on(void) |
1483 | { | |
be33690d PM |
1484 | struct sock *nlsk; |
1485 | int ret = 0; | |
1486 | ||
1487 | rcu_read_lock(); | |
1488 | nlsk = rcu_dereference(xfrm_nl); | |
1489 | if (nlsk) | |
1490 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1491 | rcu_read_unlock(); | |
1492 | return ret; | |
f8cd5488 JHS |
1493 | } |
1494 | ||
0f99be0d ED |
1495 | static inline int xfrm_alg_len(struct xfrm_algo *alg) |
1496 | { | |
1497 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1498 | } | |
1499 | ||
80c9abaa SS |
1500 | #ifdef CONFIG_XFRM_MIGRATE |
1501 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1502 | { | |
0f99be0d | 1503 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1504 | } |
1505 | ||
1506 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1507 | { | |
1508 | int i; | |
1509 | for (i = 0; i < n; i++) | |
1510 | xfrm_state_put(*(states + i)); | |
1511 | } | |
1512 | ||
1513 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1514 | { | |
1515 | int i; | |
1516 | for (i = 0; i < n; i++) | |
1517 | xfrm_state_delete(*(states + i)); | |
1518 | } | |
1519 | #endif | |
f8cd5488 | 1520 | |
00501121 HX |
1521 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1522 | { | |
1523 | return skb->sp->xvec[skb->sp->len - 1]; | |
1524 | } | |
1525 | ||
1da177e4 | 1526 | #endif /* _NET_XFRM_H */ |