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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> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 LT |
16 | |
17 | #include <net/sock.h> | |
18 | #include <net/dst.h> | |
436a0a40 | 19 | #include <net/ip.h> |
1da177e4 LT |
20 | #include <net/route.h> |
21 | #include <net/ipv6.h> | |
22 | #include <net/ip6_fib.h> | |
fe1a5f03 | 23 | #include <net/flow.h> |
9e0d57fd YP |
24 | |
25 | #include <linux/interrupt.h> | |
26 | ||
558f82ef MN |
27 | #ifdef CONFIG_XFRM_STATISTICS |
28 | #include <net/snmp.h> | |
29 | #endif | |
1da177e4 | 30 | |
d3d6dd3a MN |
31 | #define XFRM_PROTO_ESP 50 |
32 | #define XFRM_PROTO_AH 51 | |
33 | #define XFRM_PROTO_COMP 108 | |
34 | #define XFRM_PROTO_IPIP 4 | |
35 | #define XFRM_PROTO_IPV6 41 | |
36 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
37 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
38 | ||
fa9921e4 | 39 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 40 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
41 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
42 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
43 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
44 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 45 | |
558f82ef | 46 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e AD |
47 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
48 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) | |
49 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) | |
558f82ef | 50 | #else |
59c9940e AD |
51 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
52 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) | |
53 | #define XFRM_INC_STATS_USER(net, field) ((void)(net)) | |
558f82ef MN |
54 | #endif |
55 | ||
1da177e4 LT |
56 | |
57 | /* Organization of SPD aka "XFRM rules" | |
58 | ------------------------------------ | |
59 | ||
60 | Basic objects: | |
61 | - policy rule, struct xfrm_policy (=SPD entry) | |
62 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
63 | - instance of a transformer, struct xfrm_state (=SA) | |
64 | - template to clone xfrm_state, struct xfrm_tmpl | |
65 | ||
66 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
67 | (To be compatible with existing pfkeyv2 implementations, | |
68 | many rules with priority of 0x7fffffff are allowed to exist and | |
69 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
70 | ||
71 | Lookup is plain linear search until the first match with selector. | |
72 | ||
73 | If "action" is "block", then we prohibit the flow, otherwise: | |
74 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
75 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
76 | described by templates xfrm_tmpl. Each template is resolved | |
77 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
78 | to a dst_entry returned to requestor. | |
79 | ||
80 | dst -. xfrm .-> xfrm_state #1 | |
81 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
83 | |---. child .-> NULL | |
84 | ||
85 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
86 | ||
87 | ||
88 | Resolution of xrfm_tmpl | |
89 | ----------------------- | |
90 | Template contains: | |
91 | 1. ->mode Mode: transport or tunnel | |
92 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
93 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
94 | Q: allow to resolve security gateway? | |
95 | 4. ->id.spi If not zero, static SPI. | |
96 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
97 | 6. ->algos List of allowed algos. Plain bitmask now. | |
98 | Q: ealgos, aalgos, calgos. What a mess... | |
99 | 7. ->share Sharing mode. | |
100 | Q: how to implement private sharing mode? To add struct sock* to | |
101 | flow id? | |
102 | ||
103 | Having this template we search through SAD searching for entries | |
104 | with appropriate mode/proto/algo, permitted by selector. | |
105 | If no appropriate entry found, it is requested from key manager. | |
106 | ||
107 | PROBLEMS: | |
108 | Q: How to find all the bundles referring to a physical path for | |
109 | PMTU discovery? Seems, dst should contain list of all parents... | |
110 | and enter to infinite locking hierarchy disaster. | |
111 | No! It is easier, we will not search for them, let them find us. | |
112 | We add genid to each dst plus pointer to genid of raw IP route, | |
113 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
114 | dst_check() will see this for top level and trigger resyncing | |
115 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
116 | */ | |
117 | ||
12a169e7 HX |
118 | struct xfrm_state_walk { |
119 | struct list_head all; | |
120 | u8 state; | |
d3623099 ND |
121 | u8 dying; |
122 | u8 proto; | |
12a169e7 | 123 | u32 seq; |
d3623099 | 124 | struct xfrm_filter *filter; |
12a169e7 HX |
125 | }; |
126 | ||
1da177e4 | 127 | /* Full description of state of transformer. */ |
fd2c3ef7 | 128 | struct xfrm_state { |
673c09be AD |
129 | #ifdef CONFIG_NET_NS |
130 | struct net *xs_net; | |
131 | #endif | |
abb81c4f | 132 | union { |
12a169e7 | 133 | struct hlist_node gclist; |
abb81c4f HX |
134 | struct hlist_node bydst; |
135 | }; | |
8f126e37 DM |
136 | struct hlist_node bysrc; |
137 | struct hlist_node byspi; | |
1da177e4 LT |
138 | |
139 | atomic_t refcnt; | |
140 | spinlock_t lock; | |
141 | ||
142 | struct xfrm_id id; | |
143 | struct xfrm_selector sel; | |
bf825f81 | 144 | struct xfrm_mark mark; |
35d2856b | 145 | u32 tfcpad; |
1da177e4 | 146 | |
9d4a706d DM |
147 | u32 genid; |
148 | ||
12a169e7 HX |
149 | /* Key manager bits */ |
150 | struct xfrm_state_walk km; | |
1da177e4 LT |
151 | |
152 | /* Parameters of this state. */ | |
153 | struct { | |
154 | u32 reqid; | |
155 | u8 mode; | |
156 | u8 replay_window; | |
157 | u8 aalgo, ealgo, calgo; | |
158 | u8 flags; | |
159 | u16 family; | |
160 | xfrm_address_t saddr; | |
161 | int header_len; | |
162 | int trailer_len; | |
a947b0a9 | 163 | u32 extra_flags; |
1da177e4 LT |
164 | } props; |
165 | ||
166 | struct xfrm_lifetime_cfg lft; | |
167 | ||
168 | /* Data for transformer */ | |
4447bb33 | 169 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
170 | struct xfrm_algo *ealg; |
171 | struct xfrm_algo *calg; | |
1a6509d9 | 172 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
173 | |
174 | /* Data for encapsulator */ | |
175 | struct xfrm_encap_tmpl *encap; | |
176 | ||
060f02a3 NT |
177 | /* Data for care-of address */ |
178 | xfrm_address_t *coaddr; | |
179 | ||
1da177e4 LT |
180 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
181 | struct xfrm_state *tunnel; | |
182 | ||
183 | /* If a tunnel, number of users + 1 */ | |
184 | atomic_t tunnel_users; | |
185 | ||
186 | /* State for replay detection */ | |
187 | struct xfrm_replay_state replay; | |
9736acf3 | 188 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 189 | |
f8cd5488 JHS |
190 | /* Replay detection state at the time we sent the last notification */ |
191 | struct xfrm_replay_state preplay; | |
9736acf3 | 192 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 193 | |
9fdc4883 SK |
194 | /* The functions for replay detection. */ |
195 | struct xfrm_replay *repl; | |
196 | ||
2717096a JHS |
197 | /* internal flag that only holds state for delayed aevent at the |
198 | * moment | |
199 | */ | |
200 | u32 xflags; | |
201 | ||
f8cd5488 JHS |
202 | /* Replay detection notification settings */ |
203 | u32 replay_maxage; | |
204 | u32 replay_maxdiff; | |
205 | ||
206 | /* Replay detection notification timer */ | |
207 | struct timer_list rtimer; | |
208 | ||
1da177e4 LT |
209 | /* Statistics */ |
210 | struct xfrm_stats stats; | |
211 | ||
212 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 213 | struct tasklet_hrtimer mtimer; |
1da177e4 | 214 | |
e3c0d047 FD |
215 | /* used to fix curlft->add_time when changing date */ |
216 | long saved_tmo; | |
217 | ||
9afaca05 | 218 | /* Last used time */ |
d26f3984 | 219 | unsigned long lastused; |
9afaca05 | 220 | |
1da177e4 LT |
221 | /* Reference to data common to all the instances of this |
222 | * transformer. */ | |
533cb5b0 | 223 | const struct xfrm_type *type; |
13996378 | 224 | struct xfrm_mode *inner_mode; |
df9dcb45 | 225 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 226 | struct xfrm_mode *outer_mode; |
1da177e4 | 227 | |
df71837d TJ |
228 | /* Security context */ |
229 | struct xfrm_sec_ctx *security; | |
230 | ||
1da177e4 LT |
231 | /* Private data of this transformer, format is opaque, |
232 | * interpreted by xfrm_type methods. */ | |
233 | void *data; | |
234 | }; | |
235 | ||
673c09be AD |
236 | static inline struct net *xs_net(struct xfrm_state *x) |
237 | { | |
238 | return read_pnet(&x->xs_net); | |
239 | } | |
240 | ||
2717096a JHS |
241 | /* xflags - make enum if more show up */ |
242 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 243 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 244 | |
1da177e4 LT |
245 | enum { |
246 | XFRM_STATE_VOID, | |
247 | XFRM_STATE_ACQ, | |
248 | XFRM_STATE_VALID, | |
249 | XFRM_STATE_ERROR, | |
250 | XFRM_STATE_EXPIRED, | |
251 | XFRM_STATE_DEAD | |
252 | }; | |
253 | ||
26b15dad | 254 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 255 | struct km_event { |
bf08867f HX |
256 | union { |
257 | u32 hard; | |
258 | u32 proto; | |
259 | u32 byid; | |
f8cd5488 | 260 | u32 aevent; |
f7b6983f | 261 | u32 type; |
bf08867f HX |
262 | } data; |
263 | ||
26b15dad | 264 | u32 seq; |
15e47304 | 265 | u32 portid; |
26b15dad | 266 | u32 event; |
7067802e | 267 | struct net *net; |
26b15dad JHS |
268 | }; |
269 | ||
9fdc4883 SK |
270 | struct xfrm_replay { |
271 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
272 | int (*check)(struct xfrm_state *x, | |
273 | struct sk_buff *skb, | |
274 | __be32 net_seq); | |
3b59df46 SK |
275 | int (*recheck)(struct xfrm_state *x, |
276 | struct sk_buff *skb, | |
277 | __be32 net_seq); | |
9fdc4883 SK |
278 | void (*notify)(struct xfrm_state *x, int event); |
279 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
280 | }; | |
281 | ||
25ee3286 | 282 | struct net_device; |
1da177e4 LT |
283 | struct xfrm_type; |
284 | struct xfrm_dst; | |
285 | struct xfrm_policy_afinfo { | |
286 | unsigned short family; | |
1da177e4 | 287 | struct dst_ops *dst_ops; |
ddcfd796 | 288 | void (*garbage_collect)(struct net *net); |
c5b3cf46 | 289 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
5e6b930f DM |
290 | const xfrm_address_t *saddr, |
291 | const xfrm_address_t *daddr); | |
fbda33b2 | 292 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 293 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
294 | struct flowi *fl, |
295 | int reverse); | |
05d84025 | 296 | int (*get_tos)(const struct flowi *fl); |
9d7b0fc1 PM |
297 | void (*init_dst)(struct net *net, |
298 | struct xfrm_dst *dst); | |
a1b05140 MN |
299 | int (*init_path)(struct xfrm_dst *path, |
300 | struct dst_entry *dst, | |
301 | int nfheader_len); | |
25ee3286 | 302 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 303 | struct net_device *dev, |
0c7b3eef | 304 | const struct flowi *fl); |
2774c131 | 305 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
306 | }; |
307 | ||
d511337a JP |
308 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
309 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
310 | void km_policy_notify(struct xfrm_policy *xp, int dir, | |
311 | const struct km_event *c); | |
312 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
313 | |
314 | struct xfrm_tmpl; | |
d511337a JP |
315 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
316 | struct xfrm_policy *pol); | |
317 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
318 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 319 | |
1da177e4 | 320 | struct xfrm_state_afinfo { |
17c2a42a | 321 | unsigned int family; |
36cf9acf | 322 | unsigned int proto; |
8e3d716c | 323 | __be16 eth_proto; |
17c2a42a | 324 | struct module *owner; |
533cb5b0 | 325 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 326 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 327 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
328 | void (*init_tempsel)(struct xfrm_selector *sel, |
329 | const struct flowi *fl); | |
19bd6244 DM |
330 | void (*init_temprop)(struct xfrm_state *x, |
331 | const struct xfrm_tmpl *tmpl, | |
332 | const xfrm_address_t *daddr, | |
333 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
334 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
335 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 336 | int (*output)(struct sk_buff *skb); |
43a4dea4 | 337 | int (*output_finish)(struct sk_buff *skb); |
227620e2 HX |
338 | int (*extract_input)(struct xfrm_state *x, |
339 | struct sk_buff *skb); | |
36cf9acf HX |
340 | int (*extract_output)(struct xfrm_state *x, |
341 | struct sk_buff *skb); | |
716062fd HX |
342 | int (*transport_finish)(struct sk_buff *skb, |
343 | int async); | |
628e341f | 344 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
345 | }; |
346 | ||
d511337a JP |
347 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
348 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
349 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
350 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
1da177e4 | 351 | |
d511337a | 352 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 353 | |
fd2c3ef7 | 354 | struct xfrm_type { |
1da177e4 LT |
355 | char *description; |
356 | struct module *owner; | |
a6337463 | 357 | u8 proto; |
358 | u8 flags; | |
1b5c2299 | 359 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 360 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
361 | #define XFRM_TYPE_LOCAL_COADDR 4 |
362 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 363 | |
72cb6962 | 364 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 365 | void (*destructor)(struct xfrm_state *); |
e695633e | 366 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 367 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
368 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
369 | const struct flowi *); | |
aee5adb4 | 370 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 371 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 372 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
373 | }; |
374 | ||
d511337a JP |
375 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
376 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 377 | |
b59f45d0 | 378 | struct xfrm_mode { |
227620e2 HX |
379 | /* |
380 | * Remove encapsulation header. | |
381 | * | |
382 | * The IP header will be moved over the top of the encapsulation | |
383 | * header. | |
384 | * | |
385 | * On entry, the transport header shall point to where the IP header | |
386 | * should be and the network header shall be set to where the IP | |
387 | * header currently is. skb->data shall point to the start of the | |
388 | * payload. | |
389 | */ | |
390 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
391 | ||
392 | /* | |
393 | * This is the actual input entry point. | |
394 | * | |
395 | * For transport mode and equivalent this would be identical to | |
396 | * input2 (which does not need to be set). While tunnel mode | |
397 | * and equivalent would set this to the tunnel encapsulation function | |
398 | * xfrm4_prepare_input that would in turn call input2. | |
399 | */ | |
b59f45d0 | 400 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
401 | |
402 | /* | |
403 | * Add encapsulation header. | |
404 | * | |
405 | * On exit, the transport header will be set to the start of the | |
406 | * encapsulation header to be filled in by x->type->output and | |
407 | * the mac header will be set to the nextheader (protocol for | |
408 | * IPv4) field of the extension header directly preceding the | |
409 | * encapsulation header, or in its absence, that of the top IP | |
410 | * header. The value of the network header will always point | |
411 | * to the top IP header while skb->data will point to the payload. | |
412 | */ | |
36cf9acf HX |
413 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
414 | ||
415 | /* | |
416 | * This is the actual output entry point. | |
417 | * | |
418 | * For transport mode and equivalent this would be identical to | |
419 | * output2 (which does not need to be set). While tunnel mode | |
420 | * and equivalent would set this to a tunnel encapsulation function | |
421 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
422 | * call output2. | |
423 | */ | |
424 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 425 | |
17c2a42a | 426 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
427 | struct module *owner; |
428 | unsigned int encap; | |
1bfcb10f HX |
429 | int flags; |
430 | }; | |
431 | ||
432 | /* Flags for xfrm_mode. */ | |
433 | enum { | |
434 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
435 | }; |
436 | ||
d511337a JP |
437 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
438 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 439 | |
df9dcb45 KM |
440 | static inline int xfrm_af2proto(unsigned int family) |
441 | { | |
442 | switch(family) { | |
443 | case AF_INET: | |
444 | return IPPROTO_IPIP; | |
445 | case AF_INET6: | |
446 | return IPPROTO_IPV6; | |
447 | default: | |
448 | return 0; | |
449 | } | |
450 | } | |
451 | ||
452 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
453 | { | |
454 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
455 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
456 | return x->inner_mode; | |
457 | else | |
458 | return x->inner_mode_iaf; | |
459 | } | |
460 | ||
fd2c3ef7 | 461 | struct xfrm_tmpl { |
1da177e4 LT |
462 | /* id in template is interpreted as: |
463 | * daddr - destination of tunnel, may be zero for transport mode. | |
464 | * spi - zero to acquire spi. Not zero if spi is static, then | |
465 | * daddr must be fixed too. | |
466 | * proto - AH/ESP/IPCOMP | |
467 | */ | |
468 | struct xfrm_id id; | |
469 | ||
470 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
471 | xfrm_address_t saddr; | |
472 | ||
76b3f055 MK |
473 | unsigned short encap_family; |
474 | ||
a6337463 | 475 | u32 reqid; |
1da177e4 | 476 | |
7e49e6de | 477 | /* Mode: transport, tunnel etc. */ |
a6337463 | 478 | u8 mode; |
1da177e4 LT |
479 | |
480 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 481 | u8 share; |
1da177e4 LT |
482 | |
483 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 484 | u8 optional; |
1da177e4 | 485 | |
c5d18e98 | 486 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 487 | u8 allalgs; |
c5d18e98 | 488 | |
1da177e4 | 489 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 490 | u32 aalgos; |
491 | u32 ealgos; | |
492 | u32 calgos; | |
1da177e4 LT |
493 | }; |
494 | ||
622dc828 | 495 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 496 | |
12a169e7 HX |
497 | struct xfrm_policy_walk_entry { |
498 | struct list_head all; | |
499 | u8 dead; | |
500 | }; | |
501 | ||
502 | struct xfrm_policy_walk { | |
503 | struct xfrm_policy_walk_entry walk; | |
504 | u8 type; | |
505 | u32 seq; | |
506 | }; | |
507 | ||
a0073fe1 SK |
508 | struct xfrm_policy_queue { |
509 | struct sk_buff_head hold_queue; | |
510 | struct timer_list hold_timer; | |
511 | unsigned long timeout; | |
512 | }; | |
513 | ||
fd2c3ef7 | 514 | struct xfrm_policy { |
0331b1f3 AD |
515 | #ifdef CONFIG_NET_NS |
516 | struct net *xp_net; | |
517 | #endif | |
2518c7c2 DM |
518 | struct hlist_node bydst; |
519 | struct hlist_node byidx; | |
1da177e4 LT |
520 | |
521 | /* This lock only affects elements except for entry. */ | |
522 | rwlock_t lock; | |
523 | atomic_t refcnt; | |
524 | struct timer_list timer; | |
525 | ||
fe1a5f03 | 526 | struct flow_cache_object flo; |
80c802f3 | 527 | atomic_t genid; |
1da177e4 LT |
528 | u32 priority; |
529 | u32 index; | |
bf825f81 | 530 | struct xfrm_mark mark; |
1da177e4 LT |
531 | struct xfrm_selector selector; |
532 | struct xfrm_lifetime_cfg lft; | |
533 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 534 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 535 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
536 | u8 type; |
537 | u8 action; | |
538 | u8 flags; | |
46ca5f5d | 539 | u8 xfrm_nr; |
12a169e7 | 540 | u16 family; |
df71837d | 541 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
542 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
543 | }; | |
544 | ||
63eb23f5 | 545 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
546 | { |
547 | return read_pnet(&xp->xp_net); | |
548 | } | |
549 | ||
13c1d189 AE |
550 | struct xfrm_kmaddress { |
551 | xfrm_address_t local; | |
552 | xfrm_address_t remote; | |
553 | u32 reserved; | |
554 | u16 family; | |
555 | }; | |
556 | ||
80c9abaa SS |
557 | struct xfrm_migrate { |
558 | xfrm_address_t old_daddr; | |
559 | xfrm_address_t old_saddr; | |
560 | xfrm_address_t new_daddr; | |
561 | xfrm_address_t new_saddr; | |
562 | u8 proto; | |
563 | u8 mode; | |
564 | u16 reserved; | |
565 | u32 reqid; | |
566 | u16 old_family; | |
567 | u16 new_family; | |
568 | }; | |
569 | ||
f8cd5488 | 570 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
571 | /* what happened */ |
572 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
573 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
574 | ||
575 | /* default aevent timeout in units of 100ms */ | |
576 | #define XFRM_AE_ETIME 10 | |
577 | /* Async Event timer multiplier */ | |
578 | #define XFRM_AE_ETH_M 10 | |
579 | /* default seq threshold size */ | |
580 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 581 | |
fd2c3ef7 | 582 | struct xfrm_mgr { |
1da177e4 LT |
583 | struct list_head list; |
584 | char *id; | |
214e005b | 585 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 586 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 587 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 588 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 589 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 590 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
591 | int (*migrate)(const struct xfrm_selector *sel, |
592 | u8 dir, u8 type, | |
593 | const struct xfrm_migrate *m, | |
594 | int num_bundles, | |
595 | const struct xfrm_kmaddress *k); | |
0f24558e | 596 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
597 | }; |
598 | ||
d511337a JP |
599 | int xfrm_register_km(struct xfrm_mgr *km); |
600 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 601 | |
70be6c91 SK |
602 | struct xfrm_tunnel_skb_cb { |
603 | union { | |
604 | struct inet_skb_parm h4; | |
605 | struct inet6_skb_parm h6; | |
606 | } header; | |
607 | ||
608 | union { | |
609 | struct ip_tunnel *ip4; | |
610 | struct ip6_tnl *ip6; | |
611 | } tunnel; | |
612 | }; | |
613 | ||
614 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
615 | ||
436a0a40 HX |
616 | /* |
617 | * This structure is used for the duration where packets are being | |
618 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
619 | * area beyond the generic IP part may be overwritten. | |
620 | */ | |
621 | struct xfrm_skb_cb { | |
70be6c91 | 622 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
623 | |
624 | /* Sequence number for replay protection. */ | |
b318e0e4 | 625 | union { |
1ce3644a SK |
626 | struct { |
627 | __u32 low; | |
628 | __u32 hi; | |
629 | } output; | |
630 | struct { | |
631 | __be32 low; | |
632 | __be32 hi; | |
633 | } input; | |
b318e0e4 | 634 | } seq; |
436a0a40 HX |
635 | }; |
636 | ||
637 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
638 | ||
36cf9acf HX |
639 | /* |
640 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
641 | * to transmit header information to the mode input/output functions. | |
642 | */ | |
643 | struct xfrm_mode_skb_cb { | |
70be6c91 | 644 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
645 | |
646 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
647 | __be16 id; | |
648 | __be16 frag_off; | |
649 | ||
732c8bd5 HX |
650 | /* IP header length (excluding options or extension headers). */ |
651 | u8 ihl; | |
652 | ||
36cf9acf HX |
653 | /* TOS for IPv4, class for IPv6. */ |
654 | u8 tos; | |
655 | ||
656 | /* TTL for IPv4, hop limitfor IPv6. */ | |
657 | u8 ttl; | |
658 | ||
659 | /* Protocol for IPv4, NH for IPv6. */ | |
660 | u8 protocol; | |
661 | ||
732c8bd5 HX |
662 | /* Option length for IPv4, zero for IPv6. */ |
663 | u8 optlen; | |
664 | ||
36cf9acf HX |
665 | /* Used by IPv6 only, zero for IPv4. */ |
666 | u8 flow_lbl[3]; | |
667 | }; | |
668 | ||
669 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
670 | ||
716062fd HX |
671 | /* |
672 | * This structure is used by the input processing to locate the SPI and | |
673 | * related information. | |
674 | */ | |
675 | struct xfrm_spi_skb_cb { | |
70be6c91 | 676 | struct xfrm_tunnel_skb_cb header; |
716062fd | 677 | |
716062fd | 678 | unsigned int daddroff; |
2fcb45b6 | 679 | unsigned int family; |
716062fd HX |
680 | }; |
681 | ||
682 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
683 | ||
161a09e7 | 684 | /* Audit Information */ |
fd2c3ef7 | 685 | struct xfrm_audit { |
161a09e7 | 686 | u32 secid; |
e1760bd5 | 687 | kuid_t loginuid; |
4440e854 | 688 | unsigned int sessionid; |
161a09e7 | 689 | }; |
c9204d9c JL |
690 | |
691 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 692 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
693 | { |
694 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 695 | |
afeb14b4 PM |
696 | if (audit_enabled == 0) |
697 | return NULL; | |
ab5f5e8b | 698 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 699 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
700 | if (audit_buf == NULL) |
701 | return NULL; | |
afeb14b4 PM |
702 | audit_log_format(audit_buf, "op=%s", op); |
703 | return audit_buf; | |
704 | } | |
ab5f5e8b | 705 | |
4440e854 | 706 | static inline void xfrm_audit_helper_usrinfo(kuid_t auid, unsigned int ses, u32 secid, |
afeb14b4 PM |
707 | struct audit_buffer *audit_buf) |
708 | { | |
709 | char *secctx; | |
710 | u32 secctx_len; | |
ab5f5e8b | 711 | |
e1760bd5 EB |
712 | audit_log_format(audit_buf, " auid=%u ses=%u", |
713 | from_kuid(&init_user_ns, auid), ses); | |
68277acc PM |
714 | if (secid != 0 && |
715 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
716 | audit_log_format(audit_buf, " subj=%s", secctx); |
717 | security_release_secctx(secctx, secctx_len); | |
718 | } else | |
719 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
720 | } |
721 | ||
d511337a | 722 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, kuid_t auid, |
6dd9158a | 723 | unsigned int ses, u32 secid); |
d511337a | 724 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, kuid_t auid, |
6dd9158a | 725 | unsigned int ses, u32 secid); |
d511337a | 726 | void xfrm_audit_state_add(struct xfrm_state *x, int result, kuid_t auid, |
6dd9158a | 727 | unsigned int ses, u32 secid); |
d511337a | 728 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, kuid_t auid, |
6dd9158a | 729 | unsigned int ses, u32 secid); |
d511337a JP |
730 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
731 | struct sk_buff *skb); | |
732 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
733 | __be32 net_seq); | |
734 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
735 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
736 | __be32 net_seq); | |
737 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
738 | u8 proto); | |
c9204d9c | 739 | #else |
41fef0ee MS |
740 | |
741 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
4440e854 | 742 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
743 | { |
744 | } | |
745 | ||
746 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
4440e854 | 747 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
748 | { |
749 | } | |
750 | ||
751 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
4440e854 | 752 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
753 | { |
754 | } | |
755 | ||
756 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
4440e854 | 757 | kuid_t auid, unsigned int ses, u32 secid) |
41fef0ee MS |
758 | { |
759 | } | |
760 | ||
761 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
762 | struct sk_buff *skb) | |
763 | { | |
764 | } | |
765 | ||
9fdc4883 SK |
766 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
767 | struct sk_buff *skb, __be32 net_seq) | |
768 | { | |
769 | } | |
770 | ||
41fef0ee MS |
771 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
772 | u16 family) | |
773 | { | |
774 | } | |
775 | ||
776 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
777 | __be32 net_spi, __be32 net_seq) | |
778 | { | |
779 | } | |
780 | ||
781 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
782 | struct sk_buff *skb, u8 proto) | |
783 | { | |
784 | } | |
c9204d9c | 785 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 786 | |
1da177e4 LT |
787 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
788 | { | |
789 | if (likely(policy != NULL)) | |
790 | atomic_inc(&policy->refcnt); | |
791 | } | |
792 | ||
d511337a | 793 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
794 | |
795 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
796 | { | |
797 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 798 | xfrm_policy_destroy(policy); |
1da177e4 LT |
799 | } |
800 | ||
4e81bb83 MN |
801 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
802 | { | |
803 | int i; | |
804 | for (i = npols - 1; i >= 0; --i) | |
805 | xfrm_pol_put(pols[i]); | |
806 | } | |
4e81bb83 | 807 | |
d511337a | 808 | void __xfrm_state_destroy(struct xfrm_state *); |
1da177e4 | 809 | |
21380b81 HX |
810 | static inline void __xfrm_state_put(struct xfrm_state *x) |
811 | { | |
812 | atomic_dec(&x->refcnt); | |
813 | } | |
814 | ||
1da177e4 LT |
815 | static inline void xfrm_state_put(struct xfrm_state *x) |
816 | { | |
817 | if (atomic_dec_and_test(&x->refcnt)) | |
818 | __xfrm_state_destroy(x); | |
819 | } | |
820 | ||
821 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
822 | { | |
823 | atomic_inc(&x->refcnt); | |
824 | } | |
825 | ||
1744a8fe DM |
826 | static inline bool addr_match(const void *token1, const void *token2, |
827 | int prefixlen) | |
1da177e4 | 828 | { |
1744a8fe DM |
829 | const __be32 *a1 = token1; |
830 | const __be32 *a2 = token2; | |
1da177e4 LT |
831 | int pdw; |
832 | int pbi; | |
833 | ||
a6337463 | 834 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
835 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
836 | ||
837 | if (pdw) | |
838 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 839 | return false; |
1da177e4 LT |
840 | |
841 | if (pbi) { | |
5f19343f | 842 | __be32 mask; |
1da177e4 LT |
843 | |
844 | mask = htonl((0xffffffff) << (32 - pbi)); | |
845 | ||
846 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 847 | return false; |
1da177e4 LT |
848 | } |
849 | ||
1744a8fe | 850 | return true; |
1da177e4 LT |
851 | } |
852 | ||
26bff940 AD |
853 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
854 | { | |
855 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
856 | if (prefixlen == 0) | |
857 | return true; | |
858 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
859 | } | |
860 | ||
1da177e4 | 861 | static __inline__ |
6281dcc9 | 862 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 863 | { |
f9d07e41 | 864 | __be16 port; |
1d28f42c | 865 | switch(fl->flowi_proto) { |
1da177e4 LT |
866 | case IPPROTO_TCP: |
867 | case IPPROTO_UDP: | |
ba4e58ec | 868 | case IPPROTO_UDPLITE: |
1da177e4 | 869 | case IPPROTO_SCTP: |
6281dcc9 | 870 | port = uli->ports.sport; |
1da177e4 LT |
871 | break; |
872 | case IPPROTO_ICMP: | |
873 | case IPPROTO_ICMPV6: | |
6281dcc9 | 874 | port = htons(uli->icmpt.type); |
1da177e4 | 875 | break; |
2ce4272a | 876 | case IPPROTO_MH: |
6281dcc9 | 877 | port = htons(uli->mht.type); |
2ce4272a | 878 | break; |
cc9ff19d | 879 | case IPPROTO_GRE: |
6281dcc9 | 880 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 881 | break; |
1da177e4 LT |
882 | default: |
883 | port = 0; /*XXX*/ | |
884 | } | |
885 | return port; | |
886 | } | |
887 | ||
888 | static __inline__ | |
6281dcc9 | 889 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 890 | { |
f9d07e41 | 891 | __be16 port; |
1d28f42c | 892 | switch(fl->flowi_proto) { |
1da177e4 LT |
893 | case IPPROTO_TCP: |
894 | case IPPROTO_UDP: | |
ba4e58ec | 895 | case IPPROTO_UDPLITE: |
1da177e4 | 896 | case IPPROTO_SCTP: |
6281dcc9 | 897 | port = uli->ports.dport; |
1da177e4 LT |
898 | break; |
899 | case IPPROTO_ICMP: | |
900 | case IPPROTO_ICMPV6: | |
6281dcc9 | 901 | port = htons(uli->icmpt.code); |
1da177e4 | 902 | break; |
cc9ff19d | 903 | case IPPROTO_GRE: |
6281dcc9 | 904 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 905 | break; |
1da177e4 LT |
906 | default: |
907 | port = 0; /*XXX*/ | |
908 | } | |
909 | return port; | |
910 | } | |
911 | ||
d511337a JP |
912 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
913 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 914 | |
df71837d TJ |
915 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
916 | /* If neither has a context --> match | |
917 | * Otherwise, both must have a context and the sids, doi, alg must match | |
918 | */ | |
bc9b35ad | 919 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
920 | { |
921 | return ((!s1 && !s2) || | |
922 | (s1 && s2 && | |
923 | (s1->ctx_sid == s2->ctx_sid) && | |
924 | (s1->ctx_doi == s2->ctx_doi) && | |
925 | (s1->ctx_alg == s2->ctx_alg))); | |
926 | } | |
927 | #else | |
bc9b35ad | 928 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 929 | { |
bc9b35ad | 930 | return true; |
df71837d TJ |
931 | } |
932 | #endif | |
933 | ||
1da177e4 LT |
934 | /* A struct encoding bundle of transformations to apply to some set of flow. |
935 | * | |
936 | * dst->child points to the next element of bundle. | |
937 | * dst->xfrm points to an instanse of transformer. | |
938 | * | |
939 | * Due to unfortunate limitations of current routing cache, which we | |
940 | * have no time to fix, it mirrors struct rtable and bound to the same | |
941 | * routing key, including saddr,daddr. However, we can have many of | |
942 | * bundles differing by session id. All the bundles grow from a parent | |
943 | * policy rule. | |
944 | */ | |
fd2c3ef7 | 945 | struct xfrm_dst { |
1da177e4 | 946 | union { |
1da177e4 LT |
947 | struct dst_entry dst; |
948 | struct rtable rt; | |
949 | struct rt6_info rt6; | |
950 | } u; | |
951 | struct dst_entry *route; | |
80c802f3 TT |
952 | struct flow_cache_object flo; |
953 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
954 | int num_pols, num_xfrms; | |
157bfc25 MN |
955 | #ifdef CONFIG_XFRM_SUB_POLICY |
956 | struct flowi *origin; | |
957 | struct xfrm_selector *partner; | |
958 | #endif | |
80c802f3 TT |
959 | u32 xfrm_genid; |
960 | u32 policy_genid; | |
1da177e4 LT |
961 | u32 route_mtu_cached; |
962 | u32 child_mtu_cached; | |
92d63dec HY |
963 | u32 route_cookie; |
964 | u32 path_cookie; | |
1da177e4 LT |
965 | }; |
966 | ||
def8b4fa | 967 | #ifdef CONFIG_XFRM |
aabc9761 HX |
968 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
969 | { | |
80c802f3 | 970 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
971 | dst_release(xdst->route); |
972 | if (likely(xdst->u.dst.xfrm)) | |
973 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
974 | #ifdef CONFIG_XFRM_SUB_POLICY |
975 | kfree(xdst->origin); | |
976 | xdst->origin = NULL; | |
977 | kfree(xdst->partner); | |
978 | xdst->partner = NULL; | |
979 | #endif | |
aabc9761 | 980 | } |
def8b4fa | 981 | #endif |
aabc9761 | 982 | |
d511337a | 983 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 984 | |
fd2c3ef7 | 985 | struct sec_path { |
1da177e4 LT |
986 | atomic_t refcnt; |
987 | int len; | |
dbe5b4aa | 988 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
989 | }; |
990 | ||
990078af MS |
991 | static inline int secpath_exists(struct sk_buff *skb) |
992 | { | |
993 | #ifdef CONFIG_XFRM | |
994 | return skb->sp != NULL; | |
995 | #else | |
996 | return 0; | |
997 | #endif | |
998 | } | |
999 | ||
1da177e4 LT |
1000 | static inline struct sec_path * |
1001 | secpath_get(struct sec_path *sp) | |
1002 | { | |
1003 | if (sp) | |
1004 | atomic_inc(&sp->refcnt); | |
1005 | return sp; | |
1006 | } | |
1007 | ||
d511337a | 1008 | void __secpath_destroy(struct sec_path *sp); |
1da177e4 LT |
1009 | |
1010 | static inline void | |
1011 | secpath_put(struct sec_path *sp) | |
1012 | { | |
1013 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
1014 | __secpath_destroy(sp); | |
1015 | } | |
1016 | ||
d511337a | 1017 | struct sec_path *secpath_dup(struct sec_path *src); |
1da177e4 LT |
1018 | |
1019 | static inline void | |
1020 | secpath_reset(struct sk_buff *skb) | |
1021 | { | |
1022 | #ifdef CONFIG_XFRM | |
1023 | secpath_put(skb->sp); | |
1024 | skb->sp = NULL; | |
1025 | #endif | |
1026 | } | |
1027 | ||
a1e59abf | 1028 | static inline int |
6cc32961 | 1029 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1030 | { |
1031 | switch (family) { | |
1032 | case AF_INET: | |
1033 | return addr->a4 == 0; | |
1034 | case AF_INET6: | |
1035 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
1036 | } | |
1037 | return 0; | |
1038 | } | |
1039 | ||
1da177e4 | 1040 | static inline int |
21eddb5c | 1041 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1042 | { |
1043 | return (tmpl->saddr.a4 && | |
1044 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1045 | } | |
1046 | ||
1047 | static inline int | |
21eddb5c | 1048 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1049 | { |
1050 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1051 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1052 | } |
1053 | ||
1054 | static inline int | |
21eddb5c | 1055 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1056 | { |
1057 | switch (family) { | |
1058 | case AF_INET: | |
1059 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1060 | case AF_INET6: | |
1061 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1062 | } | |
1063 | return !0; | |
1064 | } | |
1065 | ||
1066 | #ifdef CONFIG_XFRM | |
d511337a JP |
1067 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1068 | unsigned short family); | |
1da177e4 | 1069 | |
d5422efe HX |
1070 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1071 | struct sk_buff *skb, | |
1072 | unsigned int family, int reverse) | |
1da177e4 | 1073 | { |
f6e1e25d | 1074 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1075 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1076 | ||
1da177e4 | 1077 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1078 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1079 | |
f6e1e25d | 1080 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1081 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1082 | __xfrm_policy_check(sk, ndir, skb, family); |
1083 | } | |
1084 | ||
1085 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1086 | { | |
1087 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1088 | } |
1089 | ||
1090 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1091 | { | |
1092 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1093 | } | |
1094 | ||
1095 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1096 | { | |
1097 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1098 | } | |
1099 | ||
d5422efe HX |
1100 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1101 | struct sk_buff *skb) | |
1102 | { | |
1103 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1104 | } | |
1105 | ||
1106 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1107 | struct sk_buff *skb) | |
1108 | { | |
1109 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1110 | } | |
1111 | ||
d511337a JP |
1112 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1113 | unsigned int family, int reverse); | |
d5422efe HX |
1114 | |
1115 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1116 | unsigned int family) | |
1117 | { | |
1118 | return __xfrm_decode_session(skb, fl, family, 0); | |
1119 | } | |
1120 | ||
1121 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1122 | struct flowi *fl, | |
1123 | unsigned int family) | |
1124 | { | |
1125 | return __xfrm_decode_session(skb, fl, family, 1); | |
1126 | } | |
1127 | ||
d511337a | 1128 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1129 | |
1130 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1131 | { | |
99a66657 AD |
1132 | struct net *net = dev_net(skb->dev); |
1133 | ||
1134 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1135 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1136 | __xfrm_route_forward(skb, family); |
1137 | } | |
1138 | ||
1139 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1140 | { | |
1141 | return xfrm_route_forward(skb, AF_INET); | |
1142 | } | |
1143 | ||
1144 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1145 | { | |
1146 | return xfrm_route_forward(skb, AF_INET6); | |
1147 | } | |
1148 | ||
d511337a | 1149 | int __xfrm_sk_clone_policy(struct sock *sk); |
1da177e4 LT |
1150 | |
1151 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1152 | { | |
1153 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1154 | return __xfrm_sk_clone_policy(sk); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
d511337a | 1158 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1159 | |
1160 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1161 | { | |
1162 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1163 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1164 | sk->sk_policy[0] = NULL; | |
1165 | } | |
1166 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1167 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1168 | sk->sk_policy[1] = NULL; | |
1169 | } | |
1170 | } | |
1171 | ||
d511337a | 1172 | void xfrm_garbage_collect(struct net *net); |
e4c17216 | 1173 | |
1da177e4 LT |
1174 | #else |
1175 | ||
1176 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1177 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1178 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1179 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1180 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1181 | { | |
1182 | return 1; | |
1183 | } | |
1184 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1185 | { | |
1186 | return 1; | |
1187 | } | |
1188 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1189 | { | |
1190 | return 1; | |
1191 | } | |
d5422efe HX |
1192 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1193 | struct flowi *fl, | |
1194 | unsigned int family) | |
1195 | { | |
1196 | return -ENOSYS; | |
1197 | } | |
1198 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1199 | struct sk_buff *skb) | |
1200 | { | |
1201 | return 1; | |
1202 | } | |
1203 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1204 | struct sk_buff *skb) | |
1205 | { | |
1206 | return 1; | |
1207 | } | |
e4c17216 PM |
1208 | static inline void xfrm_garbage_collect(struct net *net) |
1209 | { | |
1210 | } | |
1da177e4 LT |
1211 | #endif |
1212 | ||
1213 | static __inline__ | |
e8a4e377 | 1214 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1215 | { |
1216 | switch (family){ | |
1217 | case AF_INET: | |
7e1dc7b6 | 1218 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1219 | case AF_INET6: |
7e1dc7b6 | 1220 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1221 | } |
1222 | return NULL; | |
1223 | } | |
1224 | ||
1225 | static __inline__ | |
e8a4e377 | 1226 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1227 | { |
1228 | switch (family){ | |
1229 | case AF_INET: | |
7e1dc7b6 | 1230 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1231 | case AF_INET6: |
7e1dc7b6 | 1232 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1233 | } |
1234 | return NULL; | |
1235 | } | |
1236 | ||
9bb182a7 | 1237 | static __inline__ |
e8a4e377 | 1238 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1239 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1240 | unsigned short family) | |
1241 | { | |
1242 | switch(family) { | |
1243 | case AF_INET: | |
7e1dc7b6 DM |
1244 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1245 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1246 | break; |
1247 | case AF_INET6: | |
4e3fd7a0 AD |
1248 | *(struct in6_addr *)saddr->a6 = fl->u.ip6.saddr; |
1249 | *(struct in6_addr *)daddr->a6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1250 | break; |
1251 | } | |
1252 | } | |
1253 | ||
1da177e4 | 1254 | static __inline__ int |
f8848067 DM |
1255 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1256 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1257 | { |
1258 | if (daddr->a4 == x->id.daddr.a4 && | |
1259 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1260 | return 1; | |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | static __inline__ int | |
f8848067 DM |
1265 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1266 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1267 | { |
ff88b30c YH |
1268 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1269 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1270 | ipv6_addr_any((struct in6_addr *)saddr) || |
1271 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1272 | return 1; | |
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | static __inline__ int | |
f8848067 DM |
1277 | xfrm_state_addr_check(const struct xfrm_state *x, |
1278 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1279 | unsigned short family) |
1280 | { | |
1281 | switch (family) { | |
1282 | case AF_INET: | |
1283 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1284 | case AF_INET6: | |
1285 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1286 | } | |
1287 | return 0; | |
1288 | } | |
1289 | ||
e53820de | 1290 | static __inline__ int |
f8848067 | 1291 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1292 | unsigned short family) |
1293 | { | |
1294 | switch (family) { | |
1295 | case AF_INET: | |
1296 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1297 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1298 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1299 | case AF_INET6: |
1300 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1301 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1302 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1303 | } |
1304 | return 0; | |
1305 | } | |
1306 | ||
f8848067 | 1307 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1308 | { |
1309 | return atomic_read(&x->tunnel_users); | |
1310 | } | |
1311 | ||
5794708f MN |
1312 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1313 | { | |
dc00a525 MN |
1314 | return (!userproto || proto == userproto || |
1315 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1316 | proto == IPPROTO_ESP || | |
1317 | proto == IPPROTO_COMP))); | |
5794708f MN |
1318 | } |
1319 | ||
1da177e4 LT |
1320 | /* |
1321 | * xfrm algorithm information | |
1322 | */ | |
1a6509d9 HX |
1323 | struct xfrm_algo_aead_info { |
1324 | u16 icv_truncbits; | |
1325 | }; | |
1326 | ||
1da177e4 LT |
1327 | struct xfrm_algo_auth_info { |
1328 | u16 icv_truncbits; | |
1329 | u16 icv_fullbits; | |
1330 | }; | |
1331 | ||
1332 | struct xfrm_algo_encr_info { | |
1333 | u16 blockbits; | |
1334 | u16 defkeybits; | |
1335 | }; | |
1336 | ||
1337 | struct xfrm_algo_comp_info { | |
1338 | u16 threshold; | |
1339 | }; | |
1340 | ||
1341 | struct xfrm_algo_desc { | |
1342 | char *name; | |
04ff1260 | 1343 | char *compat; |
1da177e4 | 1344 | u8 available:1; |
7e50f84c | 1345 | u8 pfkey_supported:1; |
1da177e4 | 1346 | union { |
1a6509d9 | 1347 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1348 | struct xfrm_algo_auth_info auth; |
1349 | struct xfrm_algo_encr_info encr; | |
1350 | struct xfrm_algo_comp_info comp; | |
1351 | } uinfo; | |
1352 | struct sadb_alg desc; | |
1353 | }; | |
1354 | ||
3328715e SK |
1355 | /* XFRM protocol handlers. */ |
1356 | struct xfrm4_protocol { | |
1357 | int (*handler)(struct sk_buff *skb); | |
1358 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1359 | int encap_type); | |
1360 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1361 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1362 | ||
1363 | struct xfrm4_protocol __rcu *next; | |
1364 | int priority; | |
1365 | }; | |
1366 | ||
1da177e4 LT |
1367 | /* XFRM tunnel handlers. */ |
1368 | struct xfrm_tunnel { | |
1369 | int (*handler)(struct sk_buff *skb); | |
a6337463 | 1370 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1371 | |
b33eab08 | 1372 | struct xfrm_tunnel __rcu *next; |
d2acc347 | 1373 | int priority; |
1da177e4 LT |
1374 | }; |
1375 | ||
aba82695 FD |
1376 | struct xfrm_tunnel_notifier { |
1377 | int (*handler)(struct sk_buff *skb); | |
1378 | struct xfrm_tunnel_notifier __rcu *next; | |
1379 | int priority; | |
1380 | }; | |
1381 | ||
1da177e4 | 1382 | struct xfrm6_tunnel { |
d2acc347 HX |
1383 | int (*handler)(struct sk_buff *skb); |
1384 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1385 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1386 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1387 | int priority; |
1da177e4 LT |
1388 | }; |
1389 | ||
d511337a JP |
1390 | void xfrm_init(void); |
1391 | void xfrm4_init(void); | |
1392 | int xfrm_state_init(struct net *net); | |
1393 | void xfrm_state_fini(struct net *net); | |
1394 | void xfrm4_state_init(void); | |
c35b7e72 | 1395 | #ifdef CONFIG_XFRM |
d511337a JP |
1396 | int xfrm6_init(void); |
1397 | void xfrm6_fini(void); | |
1398 | int xfrm6_state_init(void); | |
1399 | void xfrm6_state_fini(void); | |
c35b7e72 DL |
1400 | #else |
1401 | static inline int xfrm6_init(void) | |
1402 | { | |
1403 | return 0; | |
1404 | } | |
1405 | static inline void xfrm6_fini(void) | |
1406 | { | |
1407 | ; | |
1408 | } | |
1409 | #endif | |
1da177e4 | 1410 | |
558f82ef | 1411 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1412 | int xfrm_proc_init(struct net *net); |
1413 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1414 | #endif |
1415 | ||
d511337a | 1416 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1417 | #ifdef CONFIG_SYSCTL |
d511337a | 1418 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1419 | #else |
1420 | static inline void xfrm_sysctl_fini(struct net *net) | |
1421 | { | |
1422 | } | |
1423 | #endif | |
1424 | ||
d3623099 ND |
1425 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
1426 | struct xfrm_filter *filter); | |
d511337a JP |
1427 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1428 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1429 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a JP |
1430 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1431 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, | |
1432 | const xfrm_address_t *saddr, | |
1433 | const struct flowi *fl, | |
1434 | struct xfrm_tmpl *tmpl, | |
1435 | struct xfrm_policy *pol, int *err, | |
1436 | unsigned short family); | |
1437 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, | |
1438 | xfrm_address_t *daddr, | |
1439 | xfrm_address_t *saddr, | |
1440 | unsigned short family, | |
1441 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1442 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1443 | unsigned short family); | |
d511337a JP |
1444 | int xfrm_state_check_expire(struct xfrm_state *x); |
1445 | void xfrm_state_insert(struct xfrm_state *x); | |
1446 | int xfrm_state_add(struct xfrm_state *x); | |
1447 | int xfrm_state_update(struct xfrm_state *x); | |
1448 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1449 | const xfrm_address_t *daddr, __be32 spi, | |
1450 | u8 proto, unsigned short family); | |
1451 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1452 | const xfrm_address_t *daddr, | |
1453 | const xfrm_address_t *saddr, | |
1454 | u8 proto, | |
1455 | unsigned short family); | |
41a49cc3 | 1456 | #ifdef CONFIG_XFRM_SUB_POLICY |
d511337a | 1457 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
283bc9f3 | 1458 | unsigned short family, struct net *net); |
d511337a JP |
1459 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1460 | unsigned short family); | |
41a49cc3 MN |
1461 | #else |
1462 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
283bc9f3 | 1463 | int n, unsigned short family, struct net *net) |
41a49cc3 MN |
1464 | { |
1465 | return -ENOSYS; | |
1466 | } | |
1467 | ||
1468 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1469 | int n, unsigned short family) | |
1470 | { | |
1471 | return -ENOSYS; | |
1472 | } | |
1473 | #endif | |
af11e316 JHS |
1474 | |
1475 | struct xfrmk_sadinfo { | |
1476 | u32 sadhcnt; /* current hash bkts */ | |
1477 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1478 | u32 sadcnt; /* current running count */ | |
1479 | }; | |
1480 | ||
5a6d3416 JHS |
1481 | struct xfrmk_spdinfo { |
1482 | u32 incnt; | |
1483 | u32 outcnt; | |
1484 | u32 fwdcnt; | |
1485 | u32 inscnt; | |
1486 | u32 outscnt; | |
1487 | u32 fwdscnt; | |
1488 | u32 spdhcnt; | |
1489 | u32 spdhmcnt; | |
1490 | }; | |
1491 | ||
d511337a JP |
1492 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1493 | int xfrm_state_delete(struct xfrm_state *x); | |
1494 | int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); | |
1495 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); | |
1496 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1497 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1498 | int xfrm_init_replay(struct xfrm_state *x); | |
1499 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
1500 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay); | |
1501 | int xfrm_init_state(struct xfrm_state *x); | |
1502 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1503 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1504 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
1505 | int xfrm_output_resume(struct sk_buff *skb, int err); | |
1506 | int xfrm_output(struct sk_buff *skb); | |
1507 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1508 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1509 | int xfrm4_extract_header(struct sk_buff *skb); | |
1510 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1511 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1512 | int encap_type); | |
1513 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1514 | int xfrm4_rcv(struct sk_buff *skb); | |
c4541b41 HX |
1515 | |
1516 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1517 | { | |
70be6c91 | 1518 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1519 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1520 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1521 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1522 | } |
1523 | ||
d511337a JP |
1524 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1525 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1526 | int xfrm4_output(struct sk_buff *skb); | |
1527 | int xfrm4_output_finish(struct sk_buff *skb); | |
3328715e SK |
1528 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1529 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); | |
1530 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1531 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1532 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a | 1533 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
212e5601 SK |
1534 | int xfrm6_mode_tunnel_input_register(struct xfrm_tunnel_notifier *handler); |
1535 | int xfrm6_mode_tunnel_input_deregister(struct xfrm_tunnel_notifier *handler); | |
d511337a JP |
1536 | int xfrm6_extract_header(struct sk_buff *skb); |
1537 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1538 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); | |
1539 | int xfrm6_transport_finish(struct sk_buff *skb, int async); | |
1540 | int xfrm6_rcv(struct sk_buff *skb); | |
1541 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1542 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1543 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
d511337a | 1544 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1545 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1546 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1547 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1548 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1549 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1550 | int xfrm6_output(struct sk_buff *skb); | |
1551 | int xfrm6_output_finish(struct sk_buff *skb); | |
1552 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, | |
1553 | u8 **prevhdr); | |
1da177e4 LT |
1554 | |
1555 | #ifdef CONFIG_XFRM | |
d511337a JP |
1556 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1557 | int xfrm_user_policy(struct sock *sk, int optname, | |
1558 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1559 | #else |
1560 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1561 | { | |
1562 | return -ENOPROTOOPT; | |
1563 | } | |
1564 | ||
067b207b | 1565 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1566 | { |
1567 | /* should not happen */ | |
1568 | kfree_skb(skb); | |
1569 | return 0; | |
1570 | } | |
1da177e4 LT |
1571 | #endif |
1572 | ||
0331b1f3 | 1573 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1574 | |
d511337a JP |
1575 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1576 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1577 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1578 | void *); | |
283bc9f3 | 1579 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1580 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1581 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1582 | u8 type, int dir, | |
4e81bb83 | 1583 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1584 | struct xfrm_sec_ctx *ctx, int delete, |
1585 | int *err); | |
d511337a JP |
1586 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
1587 | u32 id, int delete, int *err); | |
33ffbbd5 | 1588 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1589 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1590 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1591 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1592 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1593 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1594 | const xfrm_address_t *daddr, |
1595 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1596 | unsigned short family); |
d511337a | 1597 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1598 | |
80c9abaa | 1599 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1600 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1601 | const struct xfrm_migrate *m, int num_bundles, | |
1602 | const struct xfrm_kmaddress *k); | |
283bc9f3 | 1603 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a JP |
1604 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1605 | struct xfrm_migrate *m); | |
1606 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, | |
1607 | struct xfrm_migrate *m, int num_bundles, | |
8d549c4f | 1608 | struct xfrm_kmaddress *k, struct net *net); |
80c9abaa SS |
1609 | #endif |
1610 | ||
d511337a JP |
1611 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1612 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1613 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1614 | xfrm_address_t *addr); | |
1615 | ||
1616 | void xfrm_input_init(void); | |
1617 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1618 | ||
1619 | void xfrm_probe_algs(void); | |
1620 | int xfrm_count_pfkey_auth_supported(void); | |
1621 | int xfrm_count_pfkey_enc_supported(void); | |
1622 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1623 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1624 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1625 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1626 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1627 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1628 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1629 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1630 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1631 | int probe); | |
1da177e4 | 1632 | |
70e94e66 YH |
1633 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1634 | const xfrm_address_t *b) | |
1635 | { | |
1636 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1637 | (const struct in6_addr *)b); | |
1638 | } | |
1639 | ||
1640 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1641 | const xfrm_address_t *b, | |
1642 | sa_family_t family) | |
1da177e4 LT |
1643 | { |
1644 | switch (family) { | |
1645 | default: | |
1646 | case AF_INET: | |
70e94e66 | 1647 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1648 | case AF_INET6: |
70e94e66 | 1649 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1650 | } |
1651 | } | |
1652 | ||
77d8d7a6 HX |
1653 | static inline int xfrm_policy_id2dir(u32 index) |
1654 | { | |
1655 | return index & 7; | |
1656 | } | |
1657 | ||
a6483b79 AD |
1658 | #ifdef CONFIG_XFRM |
1659 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1660 | { |
be33690d PM |
1661 | struct sock *nlsk; |
1662 | int ret = 0; | |
1663 | ||
1664 | rcu_read_lock(); | |
a6483b79 | 1665 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1666 | if (nlsk) |
1667 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1668 | rcu_read_unlock(); | |
1669 | return ret; | |
f8cd5488 | 1670 | } |
0f24558e HG |
1671 | |
1672 | static inline int xfrm_acquire_is_on(struct net *net) | |
1673 | { | |
1674 | struct sock *nlsk; | |
1675 | int ret = 0; | |
1676 | ||
1677 | rcu_read_lock(); | |
1678 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1679 | if (nlsk) | |
1680 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1681 | rcu_read_unlock(); | |
1682 | ||
1683 | return ret; | |
1684 | } | |
a6483b79 | 1685 | #endif |
f8cd5488 | 1686 | |
85158621 | 1687 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1688 | { |
1689 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1690 | } | |
1691 | ||
85158621 | 1692 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1693 | { |
1694 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1695 | } | |
1696 | ||
9736acf3 SK |
1697 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1698 | { | |
1699 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1700 | } | |
1701 | ||
80c9abaa | 1702 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1703 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1704 | struct xfrm_state *orig) | |
1705 | { | |
1706 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1707 | GFP_KERNEL); | |
1708 | if (!x->replay_esn) | |
1709 | return -ENOMEM; | |
1710 | ||
1711 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1712 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1713 | ||
1714 | x->preplay_esn = kmemdup(x->replay_esn, | |
1715 | xfrm_replay_state_esn_len(x->replay_esn), | |
1716 | GFP_KERNEL); | |
1717 | if (!x->preplay_esn) { | |
1718 | kfree(x->replay_esn); | |
1719 | return -ENOMEM; | |
1720 | } | |
1721 | ||
1722 | return 0; | |
1723 | } | |
1724 | ||
80c9abaa SS |
1725 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1726 | { | |
0f99be0d | 1727 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1728 | } |
1729 | ||
4447bb33 MW |
1730 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1731 | { | |
1732 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1733 | } | |
1734 | ||
80c9abaa SS |
1735 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1736 | { | |
1737 | int i; | |
1738 | for (i = 0; i < n; i++) | |
1739 | xfrm_state_put(*(states + i)); | |
1740 | } | |
1741 | ||
1742 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1743 | { | |
1744 | int i; | |
1745 | for (i = 0; i < n; i++) | |
1746 | xfrm_state_delete(*(states + i)); | |
1747 | } | |
1748 | #endif | |
f8cd5488 | 1749 | |
def8b4fa | 1750 | #ifdef CONFIG_XFRM |
00501121 HX |
1751 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1752 | { | |
1753 | return skb->sp->xvec[skb->sp->len - 1]; | |
1754 | } | |
def8b4fa | 1755 | #endif |
00501121 | 1756 | |
bf825f81 JHS |
1757 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1758 | { | |
1759 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1760 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1761 | else |
1762 | m->v = m->m = 0; | |
1763 | ||
1764 | return m->v & m->m; | |
1765 | } | |
1766 | ||
e3dfa389 | 1767 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1768 | { |
1d1e34dd | 1769 | int ret = 0; |
bf825f81 | 1770 | |
1d1e34dd DM |
1771 | if (m->m | m->v) |
1772 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1773 | return ret; | |
bf825f81 JHS |
1774 | } |
1775 | ||
3328715e SK |
1776 | static inline int xfrm_rcv_cb(struct sk_buff *skb, unsigned int family, |
1777 | u8 protocol, int err) | |
1778 | { | |
1779 | switch(family) { | |
1780 | #ifdef CONFIG_INET | |
1781 | case AF_INET: | |
1782 | return xfrm4_rcv_cb(skb, protocol, err); | |
1783 | #endif | |
1784 | } | |
1785 | return 0; | |
1786 | } | |
1787 | ||
70be6c91 SK |
1788 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
1789 | unsigned int family) | |
1790 | { | |
1791 | bool tunnel = false; | |
1792 | ||
1793 | switch(family) { | |
1794 | case AF_INET: | |
1795 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1796 | tunnel = true; | |
1797 | break; | |
1798 | case AF_INET6: | |
1799 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1800 | tunnel = true; | |
1801 | break; | |
1802 | } | |
1803 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
1804 | return -EINVAL; | |
1805 | ||
1806 | return 0; | |
1807 | } | |
1da177e4 | 1808 | #endif /* _NET_XFRM_H */ |