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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 | 40 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e AD |
41 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
42 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) | |
43 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) | |
558f82ef | 44 | #else |
59c9940e AD |
45 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
46 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) | |
47 | #define XFRM_INC_STATS_USER(net, field) ((void)(net)) | |
558f82ef MN |
48 | #endif |
49 | ||
4a3e2f71 | 50 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
51 | |
52 | /* Organization of SPD aka "XFRM rules" | |
53 | ------------------------------------ | |
54 | ||
55 | Basic objects: | |
56 | - policy rule, struct xfrm_policy (=SPD entry) | |
57 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
58 | - instance of a transformer, struct xfrm_state (=SA) | |
59 | - template to clone xfrm_state, struct xfrm_tmpl | |
60 | ||
61 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
62 | (To be compatible with existing pfkeyv2 implementations, | |
63 | many rules with priority of 0x7fffffff are allowed to exist and | |
64 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
65 | ||
66 | Lookup is plain linear search until the first match with selector. | |
67 | ||
68 | If "action" is "block", then we prohibit the flow, otherwise: | |
69 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
70 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
71 | described by templates xfrm_tmpl. Each template is resolved | |
72 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
73 | to a dst_entry returned to requestor. | |
74 | ||
75 | dst -. xfrm .-> xfrm_state #1 | |
76 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
77 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
78 | |---. child .-> NULL | |
79 | ||
80 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
81 | ||
82 | ||
83 | Resolution of xrfm_tmpl | |
84 | ----------------------- | |
85 | Template contains: | |
86 | 1. ->mode Mode: transport or tunnel | |
87 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
88 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
89 | Q: allow to resolve security gateway? | |
90 | 4. ->id.spi If not zero, static SPI. | |
91 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
92 | 6. ->algos List of allowed algos. Plain bitmask now. | |
93 | Q: ealgos, aalgos, calgos. What a mess... | |
94 | 7. ->share Sharing mode. | |
95 | Q: how to implement private sharing mode? To add struct sock* to | |
96 | flow id? | |
97 | ||
98 | Having this template we search through SAD searching for entries | |
99 | with appropriate mode/proto/algo, permitted by selector. | |
100 | If no appropriate entry found, it is requested from key manager. | |
101 | ||
102 | PROBLEMS: | |
103 | Q: How to find all the bundles referring to a physical path for | |
104 | PMTU discovery? Seems, dst should contain list of all parents... | |
105 | and enter to infinite locking hierarchy disaster. | |
106 | No! It is easier, we will not search for them, let them find us. | |
107 | We add genid to each dst plus pointer to genid of raw IP route, | |
108 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
109 | dst_check() will see this for top level and trigger resyncing | |
110 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
111 | */ | |
112 | ||
12a169e7 HX |
113 | struct xfrm_state_walk { |
114 | struct list_head all; | |
115 | u8 state; | |
116 | union { | |
117 | u8 dying; | |
118 | u8 proto; | |
119 | }; | |
120 | u32 seq; | |
121 | }; | |
122 | ||
1da177e4 LT |
123 | /* Full description of state of transformer. */ |
124 | struct xfrm_state | |
125 | { | |
673c09be AD |
126 | #ifdef CONFIG_NET_NS |
127 | struct net *xs_net; | |
128 | #endif | |
abb81c4f | 129 | union { |
12a169e7 | 130 | struct hlist_node gclist; |
abb81c4f HX |
131 | struct hlist_node bydst; |
132 | }; | |
8f126e37 DM |
133 | struct hlist_node bysrc; |
134 | struct hlist_node byspi; | |
1da177e4 LT |
135 | |
136 | atomic_t refcnt; | |
137 | spinlock_t lock; | |
138 | ||
139 | struct xfrm_id id; | |
140 | struct xfrm_selector sel; | |
141 | ||
9d4a706d DM |
142 | u32 genid; |
143 | ||
12a169e7 HX |
144 | /* Key manager bits */ |
145 | struct xfrm_state_walk km; | |
1da177e4 LT |
146 | |
147 | /* Parameters of this state. */ | |
148 | struct { | |
149 | u32 reqid; | |
150 | u8 mode; | |
151 | u8 replay_window; | |
152 | u8 aalgo, ealgo, calgo; | |
153 | u8 flags; | |
154 | u16 family; | |
155 | xfrm_address_t saddr; | |
156 | int header_len; | |
157 | int trailer_len; | |
158 | } props; | |
159 | ||
160 | struct xfrm_lifetime_cfg lft; | |
161 | ||
162 | /* Data for transformer */ | |
163 | struct xfrm_algo *aalg; | |
164 | struct xfrm_algo *ealg; | |
165 | struct xfrm_algo *calg; | |
1a6509d9 | 166 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
167 | |
168 | /* Data for encapsulator */ | |
169 | struct xfrm_encap_tmpl *encap; | |
170 | ||
060f02a3 NT |
171 | /* Data for care-of address */ |
172 | xfrm_address_t *coaddr; | |
173 | ||
1da177e4 LT |
174 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
175 | struct xfrm_state *tunnel; | |
176 | ||
177 | /* If a tunnel, number of users + 1 */ | |
178 | atomic_t tunnel_users; | |
179 | ||
180 | /* State for replay detection */ | |
181 | struct xfrm_replay_state replay; | |
182 | ||
f8cd5488 JHS |
183 | /* Replay detection state at the time we sent the last notification */ |
184 | struct xfrm_replay_state preplay; | |
185 | ||
2717096a JHS |
186 | /* internal flag that only holds state for delayed aevent at the |
187 | * moment | |
188 | */ | |
189 | u32 xflags; | |
190 | ||
f8cd5488 JHS |
191 | /* Replay detection notification settings */ |
192 | u32 replay_maxage; | |
193 | u32 replay_maxdiff; | |
194 | ||
195 | /* Replay detection notification timer */ | |
196 | struct timer_list rtimer; | |
197 | ||
1da177e4 LT |
198 | /* Statistics */ |
199 | struct xfrm_stats stats; | |
200 | ||
201 | struct xfrm_lifetime_cur curlft; | |
202 | struct timer_list timer; | |
203 | ||
9afaca05 | 204 | /* Last used time */ |
d26f3984 | 205 | unsigned long lastused; |
9afaca05 | 206 | |
1da177e4 LT |
207 | /* Reference to data common to all the instances of this |
208 | * transformer. */ | |
533cb5b0 | 209 | const struct xfrm_type *type; |
13996378 | 210 | struct xfrm_mode *inner_mode; |
df9dcb45 | 211 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 212 | struct xfrm_mode *outer_mode; |
1da177e4 | 213 | |
df71837d TJ |
214 | /* Security context */ |
215 | struct xfrm_sec_ctx *security; | |
216 | ||
1da177e4 LT |
217 | /* Private data of this transformer, format is opaque, |
218 | * interpreted by xfrm_type methods. */ | |
219 | void *data; | |
220 | }; | |
221 | ||
673c09be AD |
222 | static inline struct net *xs_net(struct xfrm_state *x) |
223 | { | |
224 | return read_pnet(&x->xs_net); | |
225 | } | |
226 | ||
2717096a JHS |
227 | /* xflags - make enum if more show up */ |
228 | #define XFRM_TIME_DEFER 1 | |
229 | ||
1da177e4 LT |
230 | enum { |
231 | XFRM_STATE_VOID, | |
232 | XFRM_STATE_ACQ, | |
233 | XFRM_STATE_VALID, | |
234 | XFRM_STATE_ERROR, | |
235 | XFRM_STATE_EXPIRED, | |
236 | XFRM_STATE_DEAD | |
237 | }; | |
238 | ||
26b15dad JHS |
239 | /* callback structure passed from either netlink or pfkey */ |
240 | struct km_event | |
241 | { | |
bf08867f HX |
242 | union { |
243 | u32 hard; | |
244 | u32 proto; | |
245 | u32 byid; | |
f8cd5488 | 246 | u32 aevent; |
f7b6983f | 247 | u32 type; |
bf08867f HX |
248 | } data; |
249 | ||
26b15dad JHS |
250 | u32 seq; |
251 | u32 pid; | |
252 | u32 event; | |
7067802e | 253 | struct net *net; |
26b15dad JHS |
254 | }; |
255 | ||
25ee3286 | 256 | struct net_device; |
1da177e4 LT |
257 | struct xfrm_type; |
258 | struct xfrm_dst; | |
259 | struct xfrm_policy_afinfo { | |
260 | unsigned short family; | |
1da177e4 | 261 | struct dst_ops *dst_ops; |
ddcfd796 | 262 | void (*garbage_collect)(struct net *net); |
c5b3cf46 AD |
263 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
264 | xfrm_address_t *saddr, | |
66cdb3ca | 265 | xfrm_address_t *daddr); |
fbda33b2 | 266 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 267 | struct dst_entry *(*find_bundle)(struct flowi *fl, struct xfrm_policy *policy); |
1da177e4 | 268 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
269 | struct flowi *fl, |
270 | int reverse); | |
25ee3286 | 271 | int (*get_tos)(struct flowi *fl); |
a1b05140 MN |
272 | int (*init_path)(struct xfrm_dst *path, |
273 | struct dst_entry *dst, | |
274 | int nfheader_len); | |
25ee3286 HX |
275 | int (*fill_dst)(struct xfrm_dst *xdst, |
276 | struct net_device *dev); | |
1da177e4 LT |
277 | }; |
278 | ||
279 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
280 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
26b15dad JHS |
281 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c); |
282 | extern void km_state_notify(struct xfrm_state *x, struct km_event *c); | |
1da177e4 LT |
283 | |
284 | struct xfrm_tmpl; | |
980ebd25 | 285 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
286 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
287 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
288 | ||
1da177e4 | 289 | struct xfrm_state_afinfo { |
17c2a42a | 290 | unsigned int family; |
36cf9acf | 291 | unsigned int proto; |
8e3d716c | 292 | __be16 eth_proto; |
17c2a42a | 293 | struct module *owner; |
533cb5b0 | 294 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 295 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 296 | int (*init_flags)(struct xfrm_state *x); |
1da177e4 LT |
297 | void (*init_tempsel)(struct xfrm_state *x, struct flowi *fl, |
298 | struct xfrm_tmpl *tmpl, | |
299 | xfrm_address_t *daddr, xfrm_address_t *saddr); | |
41a49cc3 MN |
300 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
301 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 302 | int (*output)(struct sk_buff *skb); |
227620e2 HX |
303 | int (*extract_input)(struct xfrm_state *x, |
304 | struct sk_buff *skb); | |
36cf9acf HX |
305 | int (*extract_output)(struct xfrm_state *x, |
306 | struct sk_buff *skb); | |
716062fd HX |
307 | int (*transport_finish)(struct sk_buff *skb, |
308 | int async); | |
1da177e4 LT |
309 | }; |
310 | ||
311 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
312 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
313 | ||
314 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
315 | ||
1da177e4 LT |
316 | struct xfrm_type |
317 | { | |
318 | char *description; | |
319 | struct module *owner; | |
320 | __u8 proto; | |
1b5c2299 MN |
321 | __u8 flags; |
322 | #define XFRM_TYPE_NON_FRAGMENT 1 | |
436a0a40 | 323 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
324 | #define XFRM_TYPE_LOCAL_COADDR 4 |
325 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 326 | |
72cb6962 | 327 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 328 | void (*destructor)(struct xfrm_state *); |
e695633e | 329 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 330 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
df0ba92a | 331 | int (*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *); |
aee5adb4 | 332 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 333 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 334 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
335 | }; |
336 | ||
533cb5b0 ED |
337 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
338 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 339 | |
b59f45d0 | 340 | struct xfrm_mode { |
227620e2 HX |
341 | /* |
342 | * Remove encapsulation header. | |
343 | * | |
344 | * The IP header will be moved over the top of the encapsulation | |
345 | * header. | |
346 | * | |
347 | * On entry, the transport header shall point to where the IP header | |
348 | * should be and the network header shall be set to where the IP | |
349 | * header currently is. skb->data shall point to the start of the | |
350 | * payload. | |
351 | */ | |
352 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
353 | ||
354 | /* | |
355 | * This is the actual input entry point. | |
356 | * | |
357 | * For transport mode and equivalent this would be identical to | |
358 | * input2 (which does not need to be set). While tunnel mode | |
359 | * and equivalent would set this to the tunnel encapsulation function | |
360 | * xfrm4_prepare_input that would in turn call input2. | |
361 | */ | |
b59f45d0 | 362 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
363 | |
364 | /* | |
365 | * Add encapsulation header. | |
366 | * | |
367 | * On exit, the transport header will be set to the start of the | |
368 | * encapsulation header to be filled in by x->type->output and | |
369 | * the mac header will be set to the nextheader (protocol for | |
370 | * IPv4) field of the extension header directly preceding the | |
371 | * encapsulation header, or in its absence, that of the top IP | |
372 | * header. The value of the network header will always point | |
373 | * to the top IP header while skb->data will point to the payload. | |
374 | */ | |
36cf9acf HX |
375 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
376 | ||
377 | /* | |
378 | * This is the actual output entry point. | |
379 | * | |
380 | * For transport mode and equivalent this would be identical to | |
381 | * output2 (which does not need to be set). While tunnel mode | |
382 | * and equivalent would set this to a tunnel encapsulation function | |
383 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
384 | * call output2. | |
385 | */ | |
386 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 387 | |
17c2a42a | 388 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
389 | struct module *owner; |
390 | unsigned int encap; | |
1bfcb10f HX |
391 | int flags; |
392 | }; | |
393 | ||
394 | /* Flags for xfrm_mode. */ | |
395 | enum { | |
396 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
397 | }; |
398 | ||
399 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
400 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 401 | |
df9dcb45 KM |
402 | static inline int xfrm_af2proto(unsigned int family) |
403 | { | |
404 | switch(family) { | |
405 | case AF_INET: | |
406 | return IPPROTO_IPIP; | |
407 | case AF_INET6: | |
408 | return IPPROTO_IPV6; | |
409 | default: | |
410 | return 0; | |
411 | } | |
412 | } | |
413 | ||
414 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
415 | { | |
416 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
417 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
418 | return x->inner_mode; | |
419 | else | |
420 | return x->inner_mode_iaf; | |
421 | } | |
422 | ||
1da177e4 LT |
423 | struct xfrm_tmpl |
424 | { | |
425 | /* id in template is interpreted as: | |
426 | * daddr - destination of tunnel, may be zero for transport mode. | |
427 | * spi - zero to acquire spi. Not zero if spi is static, then | |
428 | * daddr must be fixed too. | |
429 | * proto - AH/ESP/IPCOMP | |
430 | */ | |
431 | struct xfrm_id id; | |
432 | ||
433 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
434 | xfrm_address_t saddr; | |
435 | ||
76b3f055 MK |
436 | unsigned short encap_family; |
437 | ||
1da177e4 LT |
438 | __u32 reqid; |
439 | ||
7e49e6de | 440 | /* Mode: transport, tunnel etc. */ |
1da177e4 LT |
441 | __u8 mode; |
442 | ||
443 | /* Sharing mode: unique, this session only, this user only etc. */ | |
444 | __u8 share; | |
445 | ||
446 | /* May skip this transfomration if no SA is found */ | |
447 | __u8 optional; | |
448 | ||
c5d18e98 HX |
449 | /* Skip aalgos/ealgos/calgos checks. */ |
450 | __u8 allalgs; | |
451 | ||
1da177e4 LT |
452 | /* Bit mask of algos allowed for acquisition */ |
453 | __u32 aalgos; | |
454 | __u32 ealgos; | |
455 | __u32 calgos; | |
456 | }; | |
457 | ||
622dc828 | 458 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 459 | |
12a169e7 HX |
460 | struct xfrm_policy_walk_entry { |
461 | struct list_head all; | |
462 | u8 dead; | |
463 | }; | |
464 | ||
465 | struct xfrm_policy_walk { | |
466 | struct xfrm_policy_walk_entry walk; | |
467 | u8 type; | |
468 | u32 seq; | |
469 | }; | |
470 | ||
1da177e4 LT |
471 | struct xfrm_policy |
472 | { | |
0331b1f3 AD |
473 | #ifdef CONFIG_NET_NS |
474 | struct net *xp_net; | |
475 | #endif | |
2518c7c2 DM |
476 | struct hlist_node bydst; |
477 | struct hlist_node byidx; | |
1da177e4 LT |
478 | |
479 | /* This lock only affects elements except for entry. */ | |
480 | rwlock_t lock; | |
481 | atomic_t refcnt; | |
482 | struct timer_list timer; | |
483 | ||
484 | u32 priority; | |
485 | u32 index; | |
486 | struct xfrm_selector selector; | |
487 | struct xfrm_lifetime_cfg lft; | |
488 | struct xfrm_lifetime_cur curlft; | |
489 | struct dst_entry *bundles; | |
12a169e7 | 490 | struct xfrm_policy_walk_entry walk; |
46ca5f5d ACM |
491 | u8 type; |
492 | u8 action; | |
493 | u8 flags; | |
46ca5f5d | 494 | u8 xfrm_nr; |
12a169e7 | 495 | u16 family; |
df71837d | 496 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
497 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
498 | }; | |
499 | ||
0331b1f3 AD |
500 | static inline struct net *xp_net(struct xfrm_policy *xp) |
501 | { | |
502 | return read_pnet(&xp->xp_net); | |
503 | } | |
504 | ||
13c1d189 AE |
505 | struct xfrm_kmaddress { |
506 | xfrm_address_t local; | |
507 | xfrm_address_t remote; | |
508 | u32 reserved; | |
509 | u16 family; | |
510 | }; | |
511 | ||
80c9abaa SS |
512 | struct xfrm_migrate { |
513 | xfrm_address_t old_daddr; | |
514 | xfrm_address_t old_saddr; | |
515 | xfrm_address_t new_daddr; | |
516 | xfrm_address_t new_saddr; | |
517 | u8 proto; | |
518 | u8 mode; | |
519 | u16 reserved; | |
520 | u32 reqid; | |
521 | u16 old_family; | |
522 | u16 new_family; | |
523 | }; | |
524 | ||
f8cd5488 JHS |
525 | #define XFRM_KM_TIMEOUT 30 |
526 | /* which seqno */ | |
527 | #define XFRM_REPLAY_SEQ 1 | |
528 | #define XFRM_REPLAY_OSEQ 2 | |
529 | #define XFRM_REPLAY_SEQ_MASK 3 | |
530 | /* what happened */ | |
531 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
532 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
533 | ||
534 | /* default aevent timeout in units of 100ms */ | |
535 | #define XFRM_AE_ETIME 10 | |
536 | /* Async Event timer multiplier */ | |
537 | #define XFRM_AE_ETH_M 10 | |
538 | /* default seq threshold size */ | |
539 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 LT |
540 | |
541 | struct xfrm_mgr | |
542 | { | |
543 | struct list_head list; | |
544 | char *id; | |
26b15dad | 545 | int (*notify)(struct xfrm_state *x, struct km_event *c); |
1da177e4 | 546 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 547 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 548 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
26b15dad | 549 | int (*notify_policy)(struct xfrm_policy *x, int dir, struct km_event *c); |
db983c11 | 550 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
13c1d189 | 551 | int (*migrate)(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_bundles, struct xfrm_kmaddress *k); |
1da177e4 LT |
552 | }; |
553 | ||
554 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
555 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
556 | ||
436a0a40 HX |
557 | /* |
558 | * This structure is used for the duration where packets are being | |
559 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
560 | * area beyond the generic IP part may be overwritten. | |
561 | */ | |
562 | struct xfrm_skb_cb { | |
563 | union { | |
564 | struct inet_skb_parm h4; | |
565 | struct inet6_skb_parm h6; | |
566 | } header; | |
567 | ||
568 | /* Sequence number for replay protection. */ | |
b318e0e4 HX |
569 | union { |
570 | u64 output; | |
571 | __be32 input; | |
572 | } seq; | |
436a0a40 HX |
573 | }; |
574 | ||
575 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
576 | ||
36cf9acf HX |
577 | /* |
578 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
579 | * to transmit header information to the mode input/output functions. | |
580 | */ | |
581 | struct xfrm_mode_skb_cb { | |
582 | union { | |
583 | struct inet_skb_parm h4; | |
584 | struct inet6_skb_parm h6; | |
585 | } header; | |
586 | ||
587 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
588 | __be16 id; | |
589 | __be16 frag_off; | |
590 | ||
732c8bd5 HX |
591 | /* IP header length (excluding options or extension headers). */ |
592 | u8 ihl; | |
593 | ||
36cf9acf HX |
594 | /* TOS for IPv4, class for IPv6. */ |
595 | u8 tos; | |
596 | ||
597 | /* TTL for IPv4, hop limitfor IPv6. */ | |
598 | u8 ttl; | |
599 | ||
600 | /* Protocol for IPv4, NH for IPv6. */ | |
601 | u8 protocol; | |
602 | ||
732c8bd5 HX |
603 | /* Option length for IPv4, zero for IPv6. */ |
604 | u8 optlen; | |
605 | ||
36cf9acf HX |
606 | /* Used by IPv6 only, zero for IPv4. */ |
607 | u8 flow_lbl[3]; | |
608 | }; | |
609 | ||
610 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
611 | ||
716062fd HX |
612 | /* |
613 | * This structure is used by the input processing to locate the SPI and | |
614 | * related information. | |
615 | */ | |
616 | struct xfrm_spi_skb_cb { | |
617 | union { | |
618 | struct inet_skb_parm h4; | |
619 | struct inet6_skb_parm h6; | |
620 | } header; | |
621 | ||
716062fd | 622 | unsigned int daddroff; |
2fcb45b6 | 623 | unsigned int family; |
716062fd HX |
624 | }; |
625 | ||
626 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
627 | ||
161a09e7 JL |
628 | /* Audit Information */ |
629 | struct xfrm_audit | |
630 | { | |
161a09e7 | 631 | u32 secid; |
2532386f EP |
632 | uid_t loginuid; |
633 | u32 sessionid; | |
161a09e7 | 634 | }; |
c9204d9c JL |
635 | |
636 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 637 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
638 | { |
639 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 640 | |
afeb14b4 PM |
641 | if (audit_enabled == 0) |
642 | return NULL; | |
ab5f5e8b | 643 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 644 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
645 | if (audit_buf == NULL) |
646 | return NULL; | |
afeb14b4 PM |
647 | audit_log_format(audit_buf, "op=%s", op); |
648 | return audit_buf; | |
649 | } | |
ab5f5e8b | 650 | |
2532386f | 651 | static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, |
afeb14b4 PM |
652 | struct audit_buffer *audit_buf) |
653 | { | |
654 | char *secctx; | |
655 | u32 secctx_len; | |
ab5f5e8b | 656 | |
2532386f | 657 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
68277acc PM |
658 | if (secid != 0 && |
659 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
660 | audit_log_format(audit_buf, " subj=%s", secctx); |
661 | security_release_secctx(secctx, secctx_len); | |
662 | } else | |
663 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
664 | } |
665 | ||
666 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2532386f | 667 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 668 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
2532386f | 669 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 670 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2532386f | 671 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 672 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2532386f | 673 | u32 auid, u32 ses, u32 secid); |
afeb14b4 PM |
674 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
675 | struct sk_buff *skb); | |
676 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
677 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
678 | __be32 net_spi, __be32 net_seq); | |
679 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
680 | struct sk_buff *skb, u8 proto); | |
c9204d9c | 681 | #else |
41fef0ee MS |
682 | |
683 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
684 | u32 auid, u32 ses, u32 secid) | |
685 | { | |
686 | } | |
687 | ||
688 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
689 | u32 auid, u32 ses, u32 secid) | |
690 | { | |
691 | } | |
692 | ||
693 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
694 | u32 auid, u32 ses, u32 secid) | |
695 | { | |
696 | } | |
697 | ||
698 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
699 | u32 auid, u32 ses, u32 secid) | |
700 | { | |
701 | } | |
702 | ||
703 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
704 | struct sk_buff *skb) | |
705 | { | |
706 | } | |
707 | ||
708 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, | |
709 | u16 family) | |
710 | { | |
711 | } | |
712 | ||
713 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
714 | __be32 net_spi, __be32 net_seq) | |
715 | { | |
716 | } | |
717 | ||
718 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
719 | struct sk_buff *skb, u8 proto) | |
720 | { | |
721 | } | |
c9204d9c | 722 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 723 | |
1da177e4 LT |
724 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
725 | { | |
726 | if (likely(policy != NULL)) | |
727 | atomic_inc(&policy->refcnt); | |
728 | } | |
729 | ||
64c31b3f | 730 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
731 | |
732 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
733 | { | |
734 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 735 | xfrm_policy_destroy(policy); |
1da177e4 LT |
736 | } |
737 | ||
4e81bb83 MN |
738 | #ifdef CONFIG_XFRM_SUB_POLICY |
739 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
740 | { | |
741 | int i; | |
742 | for (i = npols - 1; i >= 0; --i) | |
743 | xfrm_pol_put(pols[i]); | |
744 | } | |
745 | #else | |
746 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) | |
747 | { | |
748 | xfrm_pol_put(pols[0]); | |
749 | } | |
750 | #endif | |
751 | ||
1da177e4 LT |
752 | extern void __xfrm_state_destroy(struct xfrm_state *); |
753 | ||
21380b81 HX |
754 | static inline void __xfrm_state_put(struct xfrm_state *x) |
755 | { | |
756 | atomic_dec(&x->refcnt); | |
757 | } | |
758 | ||
1da177e4 LT |
759 | static inline void xfrm_state_put(struct xfrm_state *x) |
760 | { | |
761 | if (atomic_dec_and_test(&x->refcnt)) | |
762 | __xfrm_state_destroy(x); | |
763 | } | |
764 | ||
765 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
766 | { | |
767 | atomic_inc(&x->refcnt); | |
768 | } | |
769 | ||
770 | static __inline__ int addr_match(void *token1, void *token2, int prefixlen) | |
771 | { | |
5f19343f AV |
772 | __be32 *a1 = token1; |
773 | __be32 *a2 = token2; | |
1da177e4 LT |
774 | int pdw; |
775 | int pbi; | |
776 | ||
777 | pdw = prefixlen >> 5; /* num of whole __u32 in prefix */ | |
778 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ | |
779 | ||
780 | if (pdw) | |
781 | if (memcmp(a1, a2, pdw << 2)) | |
782 | return 0; | |
783 | ||
784 | if (pbi) { | |
5f19343f | 785 | __be32 mask; |
1da177e4 LT |
786 | |
787 | mask = htonl((0xffffffff) << (32 - pbi)); | |
788 | ||
789 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
790 | return 0; | |
791 | } | |
792 | ||
793 | return 1; | |
794 | } | |
795 | ||
796 | static __inline__ | |
f9d07e41 | 797 | __be16 xfrm_flowi_sport(struct flowi *fl) |
1da177e4 | 798 | { |
f9d07e41 | 799 | __be16 port; |
1da177e4 LT |
800 | switch(fl->proto) { |
801 | case IPPROTO_TCP: | |
802 | case IPPROTO_UDP: | |
ba4e58ec | 803 | case IPPROTO_UDPLITE: |
1da177e4 LT |
804 | case IPPROTO_SCTP: |
805 | port = fl->fl_ip_sport; | |
806 | break; | |
807 | case IPPROTO_ICMP: | |
808 | case IPPROTO_ICMPV6: | |
809 | port = htons(fl->fl_icmp_type); | |
810 | break; | |
2ce4272a MN |
811 | case IPPROTO_MH: |
812 | port = htons(fl->fl_mh_type); | |
813 | break; | |
1da177e4 LT |
814 | default: |
815 | port = 0; /*XXX*/ | |
816 | } | |
817 | return port; | |
818 | } | |
819 | ||
820 | static __inline__ | |
f9d07e41 | 821 | __be16 xfrm_flowi_dport(struct flowi *fl) |
1da177e4 | 822 | { |
f9d07e41 | 823 | __be16 port; |
1da177e4 LT |
824 | switch(fl->proto) { |
825 | case IPPROTO_TCP: | |
826 | case IPPROTO_UDP: | |
ba4e58ec | 827 | case IPPROTO_UDPLITE: |
1da177e4 LT |
828 | case IPPROTO_SCTP: |
829 | port = fl->fl_ip_dport; | |
830 | break; | |
831 | case IPPROTO_ICMP: | |
832 | case IPPROTO_ICMPV6: | |
833 | port = htons(fl->fl_icmp_code); | |
834 | break; | |
835 | default: | |
836 | port = 0; /*XXX*/ | |
837 | } | |
838 | return port; | |
839 | } | |
840 | ||
77681021 AM |
841 | extern int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl, |
842 | unsigned short family); | |
1da177e4 | 843 | |
df71837d TJ |
844 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
845 | /* If neither has a context --> match | |
846 | * Otherwise, both must have a context and the sids, doi, alg must match | |
847 | */ | |
848 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
849 | { | |
850 | return ((!s1 && !s2) || | |
851 | (s1 && s2 && | |
852 | (s1->ctx_sid == s2->ctx_sid) && | |
853 | (s1->ctx_doi == s2->ctx_doi) && | |
854 | (s1->ctx_alg == s2->ctx_alg))); | |
855 | } | |
856 | #else | |
857 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
858 | { | |
859 | return 1; | |
860 | } | |
861 | #endif | |
862 | ||
1da177e4 LT |
863 | /* A struct encoding bundle of transformations to apply to some set of flow. |
864 | * | |
865 | * dst->child points to the next element of bundle. | |
866 | * dst->xfrm points to an instanse of transformer. | |
867 | * | |
868 | * Due to unfortunate limitations of current routing cache, which we | |
869 | * have no time to fix, it mirrors struct rtable and bound to the same | |
870 | * routing key, including saddr,daddr. However, we can have many of | |
871 | * bundles differing by session id. All the bundles grow from a parent | |
872 | * policy rule. | |
873 | */ | |
874 | struct xfrm_dst | |
875 | { | |
876 | union { | |
1da177e4 LT |
877 | struct dst_entry dst; |
878 | struct rtable rt; | |
879 | struct rt6_info rt6; | |
880 | } u; | |
881 | struct dst_entry *route; | |
157bfc25 MN |
882 | #ifdef CONFIG_XFRM_SUB_POLICY |
883 | struct flowi *origin; | |
884 | struct xfrm_selector *partner; | |
885 | #endif | |
9d4a706d | 886 | u32 genid; |
1da177e4 LT |
887 | u32 route_mtu_cached; |
888 | u32 child_mtu_cached; | |
92d63dec HY |
889 | u32 route_cookie; |
890 | u32 path_cookie; | |
1da177e4 LT |
891 | }; |
892 | ||
def8b4fa | 893 | #ifdef CONFIG_XFRM |
aabc9761 HX |
894 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
895 | { | |
896 | dst_release(xdst->route); | |
897 | if (likely(xdst->u.dst.xfrm)) | |
898 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
899 | #ifdef CONFIG_XFRM_SUB_POLICY |
900 | kfree(xdst->origin); | |
901 | xdst->origin = NULL; | |
902 | kfree(xdst->partner); | |
903 | xdst->partner = NULL; | |
904 | #endif | |
aabc9761 | 905 | } |
def8b4fa | 906 | #endif |
aabc9761 HX |
907 | |
908 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
909 | ||
1da177e4 LT |
910 | struct sec_path |
911 | { | |
912 | atomic_t refcnt; | |
913 | int len; | |
dbe5b4aa | 914 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
915 | }; |
916 | ||
917 | static inline struct sec_path * | |
918 | secpath_get(struct sec_path *sp) | |
919 | { | |
920 | if (sp) | |
921 | atomic_inc(&sp->refcnt); | |
922 | return sp; | |
923 | } | |
924 | ||
925 | extern void __secpath_destroy(struct sec_path *sp); | |
926 | ||
927 | static inline void | |
928 | secpath_put(struct sec_path *sp) | |
929 | { | |
930 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
931 | __secpath_destroy(sp); | |
932 | } | |
933 | ||
934 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
935 | ||
936 | static inline void | |
937 | secpath_reset(struct sk_buff *skb) | |
938 | { | |
939 | #ifdef CONFIG_XFRM | |
940 | secpath_put(skb->sp); | |
941 | skb->sp = NULL; | |
942 | #endif | |
943 | } | |
944 | ||
a1e59abf PM |
945 | static inline int |
946 | xfrm_addr_any(xfrm_address_t *addr, unsigned short family) | |
947 | { | |
948 | switch (family) { | |
949 | case AF_INET: | |
950 | return addr->a4 == 0; | |
951 | case AF_INET6: | |
952 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
953 | } | |
954 | return 0; | |
955 | } | |
956 | ||
1da177e4 LT |
957 | static inline int |
958 | __xfrm4_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
959 | { | |
960 | return (tmpl->saddr.a4 && | |
961 | tmpl->saddr.a4 != x->props.saddr.a4); | |
962 | } | |
963 | ||
964 | static inline int | |
965 | __xfrm6_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x) | |
966 | { | |
967 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
968 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
969 | } | |
970 | ||
971 | static inline int | |
972 | xfrm_state_addr_cmp(struct xfrm_tmpl *tmpl, struct xfrm_state *x, unsigned short family) | |
973 | { | |
974 | switch (family) { | |
975 | case AF_INET: | |
976 | return __xfrm4_state_addr_cmp(tmpl, x); | |
977 | case AF_INET6: | |
978 | return __xfrm6_state_addr_cmp(tmpl, x); | |
979 | } | |
980 | return !0; | |
981 | } | |
982 | ||
983 | #ifdef CONFIG_XFRM | |
1da177e4 LT |
984 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
985 | ||
d5422efe HX |
986 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
987 | struct sk_buff *skb, | |
988 | unsigned int family, int reverse) | |
1da177e4 | 989 | { |
f6e1e25d | 990 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
991 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
992 | ||
1da177e4 | 993 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 994 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 995 | |
f6e1e25d | 996 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
1da177e4 | 997 | (skb->dst->flags & DST_NOPOLICY) || |
d5422efe HX |
998 | __xfrm_policy_check(sk, ndir, skb, family); |
999 | } | |
1000 | ||
1001 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1002 | { | |
1003 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1004 | } |
1005 | ||
1006 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1007 | { | |
1008 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1009 | } | |
1010 | ||
1011 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1012 | { | |
1013 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1014 | } | |
1015 | ||
d5422efe HX |
1016 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1017 | struct sk_buff *skb) | |
1018 | { | |
1019 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1020 | } | |
1021 | ||
1022 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1023 | struct sk_buff *skb) | |
1024 | { | |
1025 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1026 | } | |
1027 | ||
1028 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1029 | unsigned int family, int reverse); | |
1030 | ||
1031 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1032 | unsigned int family) | |
1033 | { | |
1034 | return __xfrm_decode_session(skb, fl, family, 0); | |
1035 | } | |
1036 | ||
1037 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1038 | struct flowi *fl, | |
1039 | unsigned int family) | |
1040 | { | |
1041 | return __xfrm_decode_session(skb, fl, family, 1); | |
1042 | } | |
1043 | ||
1da177e4 LT |
1044 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1045 | ||
1046 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1047 | { | |
99a66657 AD |
1048 | struct net *net = dev_net(skb->dev); |
1049 | ||
1050 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
1da177e4 LT |
1051 | (skb->dst->flags & DST_NOXFRM) || |
1052 | __xfrm_route_forward(skb, family); | |
1053 | } | |
1054 | ||
1055 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1056 | { | |
1057 | return xfrm_route_forward(skb, AF_INET); | |
1058 | } | |
1059 | ||
1060 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1061 | { | |
1062 | return xfrm_route_forward(skb, AF_INET6); | |
1063 | } | |
1064 | ||
1065 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
1066 | ||
1067 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1068 | { | |
1069 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1070 | return __xfrm_sk_clone_policy(sk); | |
1071 | return 0; | |
1072 | } | |
1073 | ||
4666faab | 1074 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1075 | |
1076 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1077 | { | |
1078 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1079 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1080 | sk->sk_policy[0] = NULL; | |
1081 | } | |
1082 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1083 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1084 | sk->sk_policy[1] = NULL; | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | #else | |
1089 | ||
1090 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1091 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1092 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1093 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1094 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1095 | { | |
1096 | return 1; | |
1097 | } | |
1098 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1099 | { | |
1100 | return 1; | |
1101 | } | |
1102 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1103 | { | |
1104 | return 1; | |
1105 | } | |
d5422efe HX |
1106 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1107 | struct flowi *fl, | |
1108 | unsigned int family) | |
1109 | { | |
1110 | return -ENOSYS; | |
1111 | } | |
1112 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1113 | struct sk_buff *skb) | |
1114 | { | |
1115 | return 1; | |
1116 | } | |
1117 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1118 | struct sk_buff *skb) | |
1119 | { | |
1120 | return 1; | |
1121 | } | |
1da177e4 LT |
1122 | #endif |
1123 | ||
1124 | static __inline__ | |
1125 | xfrm_address_t *xfrm_flowi_daddr(struct flowi *fl, unsigned short family) | |
1126 | { | |
1127 | switch (family){ | |
1128 | case AF_INET: | |
1129 | return (xfrm_address_t *)&fl->fl4_dst; | |
1130 | case AF_INET6: | |
1131 | return (xfrm_address_t *)&fl->fl6_dst; | |
1132 | } | |
1133 | return NULL; | |
1134 | } | |
1135 | ||
1136 | static __inline__ | |
1137 | xfrm_address_t *xfrm_flowi_saddr(struct flowi *fl, unsigned short family) | |
1138 | { | |
1139 | switch (family){ | |
1140 | case AF_INET: | |
1141 | return (xfrm_address_t *)&fl->fl4_src; | |
1142 | case AF_INET6: | |
1143 | return (xfrm_address_t *)&fl->fl6_src; | |
1144 | } | |
1145 | return NULL; | |
1146 | } | |
1147 | ||
9bb182a7 YH |
1148 | static __inline__ |
1149 | void xfrm_flowi_addr_get(struct flowi *fl, | |
1150 | xfrm_address_t *saddr, xfrm_address_t *daddr, | |
1151 | unsigned short family) | |
1152 | { | |
1153 | switch(family) { | |
1154 | case AF_INET: | |
1155 | memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); | |
1156 | memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); | |
1157 | break; | |
1158 | case AF_INET6: | |
1159 | ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); | |
1160 | ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); | |
1161 | break; | |
1162 | } | |
1163 | } | |
1164 | ||
1da177e4 LT |
1165 | static __inline__ int |
1166 | __xfrm4_state_addr_check(struct xfrm_state *x, | |
1167 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1168 | { | |
1169 | if (daddr->a4 == x->id.daddr.a4 && | |
1170 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1171 | return 1; | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static __inline__ int | |
1176 | __xfrm6_state_addr_check(struct xfrm_state *x, | |
1177 | xfrm_address_t *daddr, xfrm_address_t *saddr) | |
1178 | { | |
1179 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
1180 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
1181 | ipv6_addr_any((struct in6_addr *)saddr) || | |
1182 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1183 | return 1; | |
1184 | return 0; | |
1185 | } | |
1186 | ||
1187 | static __inline__ int | |
1188 | xfrm_state_addr_check(struct xfrm_state *x, | |
1189 | xfrm_address_t *daddr, xfrm_address_t *saddr, | |
1190 | unsigned short family) | |
1191 | { | |
1192 | switch (family) { | |
1193 | case AF_INET: | |
1194 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1195 | case AF_INET6: | |
1196 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1197 | } | |
1198 | return 0; | |
1199 | } | |
1200 | ||
e53820de MN |
1201 | static __inline__ int |
1202 | xfrm_state_addr_flow_check(struct xfrm_state *x, struct flowi *fl, | |
1203 | unsigned short family) | |
1204 | { | |
1205 | switch (family) { | |
1206 | case AF_INET: | |
1207 | return __xfrm4_state_addr_check(x, | |
1208 | (xfrm_address_t *)&fl->fl4_dst, | |
1209 | (xfrm_address_t *)&fl->fl4_src); | |
1210 | case AF_INET6: | |
1211 | return __xfrm6_state_addr_check(x, | |
1212 | (xfrm_address_t *)&fl->fl6_dst, | |
1213 | (xfrm_address_t *)&fl->fl6_src); | |
1214 | } | |
1215 | return 0; | |
1216 | } | |
1217 | ||
1da177e4 LT |
1218 | static inline int xfrm_state_kern(struct xfrm_state *x) |
1219 | { | |
1220 | return atomic_read(&x->tunnel_users); | |
1221 | } | |
1222 | ||
5794708f MN |
1223 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1224 | { | |
dc00a525 MN |
1225 | return (!userproto || proto == userproto || |
1226 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1227 | proto == IPPROTO_ESP || | |
1228 | proto == IPPROTO_COMP))); | |
5794708f MN |
1229 | } |
1230 | ||
1da177e4 LT |
1231 | /* |
1232 | * xfrm algorithm information | |
1233 | */ | |
1a6509d9 HX |
1234 | struct xfrm_algo_aead_info { |
1235 | u16 icv_truncbits; | |
1236 | }; | |
1237 | ||
1da177e4 LT |
1238 | struct xfrm_algo_auth_info { |
1239 | u16 icv_truncbits; | |
1240 | u16 icv_fullbits; | |
1241 | }; | |
1242 | ||
1243 | struct xfrm_algo_encr_info { | |
1244 | u16 blockbits; | |
1245 | u16 defkeybits; | |
1246 | }; | |
1247 | ||
1248 | struct xfrm_algo_comp_info { | |
1249 | u16 threshold; | |
1250 | }; | |
1251 | ||
1252 | struct xfrm_algo_desc { | |
1253 | char *name; | |
04ff1260 | 1254 | char *compat; |
1da177e4 LT |
1255 | u8 available:1; |
1256 | union { | |
1a6509d9 | 1257 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1258 | struct xfrm_algo_auth_info auth; |
1259 | struct xfrm_algo_encr_info encr; | |
1260 | struct xfrm_algo_comp_info comp; | |
1261 | } uinfo; | |
1262 | struct sadb_alg desc; | |
1263 | }; | |
1264 | ||
1265 | /* XFRM tunnel handlers. */ | |
1266 | struct xfrm_tunnel { | |
1267 | int (*handler)(struct sk_buff *skb); | |
d2acc347 HX |
1268 | int (*err_handler)(struct sk_buff *skb, __u32 info); |
1269 | ||
1270 | struct xfrm_tunnel *next; | |
1271 | int priority; | |
1da177e4 LT |
1272 | }; |
1273 | ||
1274 | struct xfrm6_tunnel { | |
d2acc347 HX |
1275 | int (*handler)(struct sk_buff *skb); |
1276 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 1277 | int type, int code, int offset, __be32 info); |
d2acc347 HX |
1278 | struct xfrm6_tunnel *next; |
1279 | int priority; | |
1da177e4 LT |
1280 | }; |
1281 | ||
1282 | extern void xfrm_init(void); | |
1283 | extern void xfrm4_init(void); | |
d62ddc21 AD |
1284 | extern int xfrm_state_init(struct net *net); |
1285 | extern void xfrm_state_fini(struct net *net); | |
1da177e4 | 1286 | extern void xfrm4_state_init(void); |
c35b7e72 DL |
1287 | #ifdef CONFIG_XFRM |
1288 | extern int xfrm6_init(void); | |
1289 | extern void xfrm6_fini(void); | |
0013caba | 1290 | extern int xfrm6_state_init(void); |
1da177e4 | 1291 | extern void xfrm6_state_fini(void); |
c35b7e72 DL |
1292 | #else |
1293 | static inline int xfrm6_init(void) | |
1294 | { | |
1295 | return 0; | |
1296 | } | |
1297 | static inline void xfrm6_fini(void) | |
1298 | { | |
1299 | ; | |
1300 | } | |
1301 | #endif | |
1da177e4 | 1302 | |
558f82ef | 1303 | #ifdef CONFIG_XFRM_STATISTICS |
c68cd1a0 AD |
1304 | extern int xfrm_proc_init(struct net *net); |
1305 | extern void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1306 | #endif |
1307 | ||
b27aeadb AD |
1308 | extern int xfrm_sysctl_init(struct net *net); |
1309 | #ifdef CONFIG_SYSCTL | |
1310 | extern void xfrm_sysctl_fini(struct net *net); | |
1311 | #else | |
1312 | static inline void xfrm_sysctl_fini(struct net *net) | |
1313 | { | |
1314 | } | |
1315 | #endif | |
1316 | ||
5c182458 | 1317 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
284fa7da | 1318 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1319 | int (*func)(struct xfrm_state *, int, void*), void *); |
abb81c4f | 1320 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
673c09be | 1321 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
1da177e4 LT |
1322 | extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, |
1323 | struct flowi *fl, struct xfrm_tmpl *tmpl, | |
1324 | struct xfrm_policy *pol, int *err, | |
1325 | unsigned short family); | |
5447c5e4 AD |
1326 | extern struct xfrm_state * xfrm_stateonly_find(struct net *net, |
1327 | xfrm_address_t *daddr, | |
628529b6 JHS |
1328 | xfrm_address_t *saddr, |
1329 | unsigned short family, | |
1330 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1331 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1332 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1333 | extern int xfrm_state_add(struct xfrm_state *x); | |
1334 | extern int xfrm_state_update(struct xfrm_state *x); | |
221df1ed AD |
1335 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family); |
1336 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, xfrm_address_t *daddr, xfrm_address_t *saddr, u8 proto, unsigned short family); | |
41a49cc3 MN |
1337 | #ifdef CONFIG_XFRM_SUB_POLICY |
1338 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1339 | int n, unsigned short family); | |
1340 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1341 | int n, unsigned short family); | |
1342 | #else | |
1343 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1344 | int n, unsigned short family) | |
1345 | { | |
1346 | return -ENOSYS; | |
1347 | } | |
1348 | ||
1349 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1350 | int n, unsigned short family) | |
1351 | { | |
1352 | return -ENOSYS; | |
1353 | } | |
1354 | #endif | |
af11e316 JHS |
1355 | |
1356 | struct xfrmk_sadinfo { | |
1357 | u32 sadhcnt; /* current hash bkts */ | |
1358 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1359 | u32 sadcnt; /* current running count */ | |
1360 | }; | |
1361 | ||
5a6d3416 JHS |
1362 | struct xfrmk_spdinfo { |
1363 | u32 incnt; | |
1364 | u32 outcnt; | |
1365 | u32 fwdcnt; | |
1366 | u32 inscnt; | |
1367 | u32 outscnt; | |
1368 | u32 fwdscnt; | |
1369 | u32 spdhcnt; | |
1370 | u32 spdhmcnt; | |
1371 | }; | |
1372 | ||
5447c5e4 | 1373 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 seq); |
26b15dad | 1374 | extern int xfrm_state_delete(struct xfrm_state *x); |
0e602451 | 1375 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
af11e316 | 1376 | extern void xfrm_sad_getinfo(struct xfrmk_sadinfo *si); |
5a6d3416 | 1377 | extern void xfrm_spd_getinfo(struct xfrmk_spdinfo *si); |
afeb14b4 PM |
1378 | extern int xfrm_replay_check(struct xfrm_state *x, |
1379 | struct sk_buff *skb, __be32 seq); | |
61f4627b | 1380 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1381 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1382 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1383 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1384 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1385 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1386 | int encap_type); | |
1bf06cd2 | 1387 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1388 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1389 | extern int xfrm_output(struct sk_buff *skb); |
df9dcb45 | 1390 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
36cf9acf | 1391 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1392 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1393 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1394 | int encap_type); | |
716062fd | 1395 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1396 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1397 | |
1398 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1399 | { | |
1400 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1401 | } | |
1402 | ||
36cf9acf HX |
1403 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1404 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1405 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1406 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1407 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
36cf9acf | 1408 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1409 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1410 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1411 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1412 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1413 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1414 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1415 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1416 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
8c689a6e | 1417 | extern __be32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr); |
1da177e4 | 1418 | extern void xfrm6_tunnel_free_spi(xfrm_address_t *saddr); |
8c689a6e | 1419 | extern __be32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr); |
36cf9acf HX |
1420 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1421 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1422 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1423 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1424 | u8 **prevhdr); | |
1da177e4 LT |
1425 | |
1426 | #ifdef CONFIG_XFRM | |
067b207b | 1427 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1428 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1429 | #else |
1430 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1431 | { | |
1432 | return -ENOPROTOOPT; | |
1433 | } | |
1434 | ||
067b207b | 1435 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1436 | { |
1437 | /* should not happen */ | |
1438 | kfree_skb(skb); | |
1439 | return 0; | |
1440 | } | |
1da177e4 LT |
1441 | #endif |
1442 | ||
0331b1f3 | 1443 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1444 | |
12a169e7 | 1445 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
cdcbca7c | 1446 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
4c563f76 | 1447 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
12a169e7 | 1448 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
1da177e4 | 1449 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8d1211a6 | 1450 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u8 type, int dir, |
4e81bb83 | 1451 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1452 | struct xfrm_sec_ctx *ctx, int delete, |
1453 | int *err); | |
8d1211a6 | 1454 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u8, int dir, u32 id, int delete, int *err); |
33ffbbd5 | 1455 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1456 | u32 xfrm_get_acqseq(void); |
658b219e | 1457 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
5447c5e4 | 1458 | struct xfrm_state * xfrm_find_acq(struct net *net, u8 mode, u32 reqid, u8 proto, |
161a09e7 | 1459 | xfrm_address_t *daddr, xfrm_address_t *saddr, |
1da177e4 | 1460 | int create, unsigned short family); |
1da177e4 | 1461 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
5b368e61 VY |
1462 | extern int xfrm_bundle_ok(struct xfrm_policy *pol, struct xfrm_dst *xdst, |
1463 | struct flowi *fl, int family, int strict); | |
1da177e4 | 1464 | |
80c9abaa SS |
1465 | #ifdef CONFIG_XFRM_MIGRATE |
1466 | extern int km_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
1467 | struct xfrm_migrate *m, int num_bundles, |
1468 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1469 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
1470 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1471 | struct xfrm_migrate *m); | |
1472 | extern int xfrm_migrate(struct xfrm_selector *sel, u8 dir, u8 type, | |
13c1d189 AE |
1473 | struct xfrm_migrate *m, int num_bundles, |
1474 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1475 | #endif |
1476 | ||
5d36b180 | 1477 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1478 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
db983c11 | 1479 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1480 | |
1481 | extern void xfrm_input_init(void); | |
6067b2ba | 1482 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1483 | |
1484 | extern void xfrm_probe_algs(void); | |
1485 | extern int xfrm_count_auth_supported(void); | |
1486 | extern int xfrm_count_enc_supported(void); | |
1487 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1488 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1489 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1490 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1491 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1492 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(char *name, int probe); | |
1493 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(char *name, int probe); | |
1494 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(char *name, int probe); | |
1a6509d9 HX |
1495 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(char *name, int icv_len, |
1496 | int probe); | |
1da177e4 | 1497 | |
07d4ee58 | 1498 | struct hash_desc; |
9409f38a | 1499 | struct scatterlist; |
07d4ee58 HX |
1500 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1501 | unsigned int); | |
1da177e4 | 1502 | |
07d4ee58 HX |
1503 | extern int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *tfm, |
1504 | int offset, int len, icv_update_fn_t icv_update); | |
1da177e4 LT |
1505 | |
1506 | static inline int xfrm_addr_cmp(xfrm_address_t *a, xfrm_address_t *b, | |
1507 | int family) | |
1508 | { | |
1509 | switch (family) { | |
1510 | default: | |
1511 | case AF_INET: | |
8c689a6e | 1512 | return (__force __u32)a->a4 - (__force __u32)b->a4; |
1da177e4 LT |
1513 | case AF_INET6: |
1514 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1515 | (struct in6_addr *)b); | |
1516 | } | |
1517 | } | |
1518 | ||
77d8d7a6 HX |
1519 | static inline int xfrm_policy_id2dir(u32 index) |
1520 | { | |
1521 | return index & 7; | |
1522 | } | |
1523 | ||
a6483b79 AD |
1524 | #ifdef CONFIG_XFRM |
1525 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1526 | { |
be33690d PM |
1527 | struct sock *nlsk; |
1528 | int ret = 0; | |
1529 | ||
1530 | rcu_read_lock(); | |
a6483b79 | 1531 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1532 | if (nlsk) |
1533 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1534 | rcu_read_unlock(); | |
1535 | return ret; | |
f8cd5488 | 1536 | } |
a6483b79 | 1537 | #endif |
f8cd5488 | 1538 | |
0f99be0d ED |
1539 | static inline int xfrm_alg_len(struct xfrm_algo *alg) |
1540 | { | |
1541 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1542 | } | |
1543 | ||
80c9abaa SS |
1544 | #ifdef CONFIG_XFRM_MIGRATE |
1545 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1546 | { | |
0f99be0d | 1547 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1548 | } |
1549 | ||
1550 | static inline void xfrm_states_put(struct xfrm_state **states, int n) | |
1551 | { | |
1552 | int i; | |
1553 | for (i = 0; i < n; i++) | |
1554 | xfrm_state_put(*(states + i)); | |
1555 | } | |
1556 | ||
1557 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1558 | { | |
1559 | int i; | |
1560 | for (i = 0; i < n; i++) | |
1561 | xfrm_state_delete(*(states + i)); | |
1562 | } | |
1563 | #endif | |
f8cd5488 | 1564 | |
def8b4fa | 1565 | #ifdef CONFIG_XFRM |
00501121 HX |
1566 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1567 | { | |
1568 | return skb->sp->xvec[skb->sp->len - 1]; | |
1569 | } | |
def8b4fa | 1570 | #endif |
00501121 | 1571 | |
1da177e4 | 1572 | #endif /* _NET_XFRM_H */ |