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 | 47 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
558f82ef | 48 | #else |
59c9940e | 49 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
558f82ef MN |
50 | #endif |
51 | ||
1da177e4 LT |
52 | |
53 | /* Organization of SPD aka "XFRM rules" | |
54 | ------------------------------------ | |
55 | ||
56 | Basic objects: | |
57 | - policy rule, struct xfrm_policy (=SPD entry) | |
58 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
59 | - instance of a transformer, struct xfrm_state (=SA) | |
60 | - template to clone xfrm_state, struct xfrm_tmpl | |
61 | ||
62 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
63 | (To be compatible with existing pfkeyv2 implementations, | |
64 | many rules with priority of 0x7fffffff are allowed to exist and | |
65 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
66 | ||
67 | Lookup is plain linear search until the first match with selector. | |
68 | ||
69 | If "action" is "block", then we prohibit the flow, otherwise: | |
70 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
71 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
72 | described by templates xfrm_tmpl. Each template is resolved | |
73 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
74 | to a dst_entry returned to requestor. | |
75 | ||
76 | dst -. xfrm .-> xfrm_state #1 | |
77 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
78 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
79 | |---. child .-> NULL | |
80 | ||
81 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
82 | ||
83 | ||
84 | Resolution of xrfm_tmpl | |
85 | ----------------------- | |
86 | Template contains: | |
87 | 1. ->mode Mode: transport or tunnel | |
88 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
89 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
90 | Q: allow to resolve security gateway? | |
91 | 4. ->id.spi If not zero, static SPI. | |
92 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
93 | 6. ->algos List of allowed algos. Plain bitmask now. | |
94 | Q: ealgos, aalgos, calgos. What a mess... | |
95 | 7. ->share Sharing mode. | |
96 | Q: how to implement private sharing mode? To add struct sock* to | |
97 | flow id? | |
98 | ||
99 | Having this template we search through SAD searching for entries | |
100 | with appropriate mode/proto/algo, permitted by selector. | |
101 | If no appropriate entry found, it is requested from key manager. | |
102 | ||
103 | PROBLEMS: | |
104 | Q: How to find all the bundles referring to a physical path for | |
105 | PMTU discovery? Seems, dst should contain list of all parents... | |
106 | and enter to infinite locking hierarchy disaster. | |
107 | No! It is easier, we will not search for them, let them find us. | |
108 | We add genid to each dst plus pointer to genid of raw IP route, | |
109 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
110 | dst_check() will see this for top level and trigger resyncing | |
111 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
112 | */ | |
113 | ||
12a169e7 HX |
114 | struct xfrm_state_walk { |
115 | struct list_head all; | |
116 | u8 state; | |
d3623099 ND |
117 | u8 dying; |
118 | u8 proto; | |
12a169e7 | 119 | u32 seq; |
870a2df4 | 120 | struct xfrm_address_filter *filter; |
12a169e7 HX |
121 | }; |
122 | ||
1da177e4 | 123 | /* Full description of state of transformer. */ |
fd2c3ef7 | 124 | struct xfrm_state { |
0c5c9fb5 | 125 | possible_net_t xs_net; |
abb81c4f | 126 | union { |
12a169e7 | 127 | struct hlist_node gclist; |
abb81c4f HX |
128 | struct hlist_node bydst; |
129 | }; | |
8f126e37 DM |
130 | struct hlist_node bysrc; |
131 | struct hlist_node byspi; | |
1da177e4 LT |
132 | |
133 | atomic_t refcnt; | |
134 | spinlock_t lock; | |
135 | ||
136 | struct xfrm_id id; | |
137 | struct xfrm_selector sel; | |
bf825f81 | 138 | struct xfrm_mark mark; |
35d2856b | 139 | u32 tfcpad; |
1da177e4 | 140 | |
9d4a706d DM |
141 | u32 genid; |
142 | ||
12a169e7 HX |
143 | /* Key manager bits */ |
144 | struct xfrm_state_walk km; | |
1da177e4 LT |
145 | |
146 | /* Parameters of this state. */ | |
147 | struct { | |
148 | u32 reqid; | |
149 | u8 mode; | |
150 | u8 replay_window; | |
151 | u8 aalgo, ealgo, calgo; | |
152 | u8 flags; | |
153 | u16 family; | |
154 | xfrm_address_t saddr; | |
155 | int header_len; | |
156 | int trailer_len; | |
a947b0a9 | 157 | u32 extra_flags; |
1da177e4 LT |
158 | } props; |
159 | ||
160 | struct xfrm_lifetime_cfg lft; | |
161 | ||
162 | /* Data for transformer */ | |
4447bb33 | 163 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
164 | struct xfrm_algo *ealg; |
165 | struct xfrm_algo *calg; | |
1a6509d9 | 166 | struct xfrm_algo_aead *aead; |
69b0137f | 167 | const char *geniv; |
1da177e4 LT |
168 | |
169 | /* Data for encapsulator */ | |
170 | struct xfrm_encap_tmpl *encap; | |
171 | ||
060f02a3 NT |
172 | /* Data for care-of address */ |
173 | xfrm_address_t *coaddr; | |
174 | ||
1da177e4 LT |
175 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
176 | struct xfrm_state *tunnel; | |
177 | ||
178 | /* If a tunnel, number of users + 1 */ | |
179 | atomic_t tunnel_users; | |
180 | ||
181 | /* State for replay detection */ | |
182 | struct xfrm_replay_state replay; | |
9736acf3 | 183 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 184 | |
f8cd5488 JHS |
185 | /* Replay detection state at the time we sent the last notification */ |
186 | struct xfrm_replay_state preplay; | |
9736acf3 | 187 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 188 | |
9fdc4883 SK |
189 | /* The functions for replay detection. */ |
190 | struct xfrm_replay *repl; | |
191 | ||
2717096a JHS |
192 | /* internal flag that only holds state for delayed aevent at the |
193 | * moment | |
194 | */ | |
195 | u32 xflags; | |
196 | ||
f8cd5488 JHS |
197 | /* Replay detection notification settings */ |
198 | u32 replay_maxage; | |
199 | u32 replay_maxdiff; | |
200 | ||
201 | /* Replay detection notification timer */ | |
202 | struct timer_list rtimer; | |
203 | ||
1da177e4 LT |
204 | /* Statistics */ |
205 | struct xfrm_stats stats; | |
206 | ||
207 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 208 | struct tasklet_hrtimer mtimer; |
1da177e4 | 209 | |
e3c0d047 FD |
210 | /* used to fix curlft->add_time when changing date */ |
211 | long saved_tmo; | |
212 | ||
9afaca05 | 213 | /* Last used time */ |
d26f3984 | 214 | unsigned long lastused; |
9afaca05 | 215 | |
1da177e4 LT |
216 | /* Reference to data common to all the instances of this |
217 | * transformer. */ | |
533cb5b0 | 218 | const struct xfrm_type *type; |
13996378 | 219 | struct xfrm_mode *inner_mode; |
df9dcb45 | 220 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 221 | struct xfrm_mode *outer_mode; |
1da177e4 | 222 | |
df71837d TJ |
223 | /* Security context */ |
224 | struct xfrm_sec_ctx *security; | |
225 | ||
1da177e4 LT |
226 | /* Private data of this transformer, format is opaque, |
227 | * interpreted by xfrm_type methods. */ | |
228 | void *data; | |
229 | }; | |
230 | ||
673c09be AD |
231 | static inline struct net *xs_net(struct xfrm_state *x) |
232 | { | |
233 | return read_pnet(&x->xs_net); | |
234 | } | |
235 | ||
2717096a JHS |
236 | /* xflags - make enum if more show up */ |
237 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 238 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 239 | |
1da177e4 LT |
240 | enum { |
241 | XFRM_STATE_VOID, | |
242 | XFRM_STATE_ACQ, | |
243 | XFRM_STATE_VALID, | |
244 | XFRM_STATE_ERROR, | |
245 | XFRM_STATE_EXPIRED, | |
246 | XFRM_STATE_DEAD | |
247 | }; | |
248 | ||
26b15dad | 249 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 250 | struct km_event { |
bf08867f HX |
251 | union { |
252 | u32 hard; | |
253 | u32 proto; | |
254 | u32 byid; | |
f8cd5488 | 255 | u32 aevent; |
f7b6983f | 256 | u32 type; |
bf08867f HX |
257 | } data; |
258 | ||
26b15dad | 259 | u32 seq; |
15e47304 | 260 | u32 portid; |
26b15dad | 261 | u32 event; |
7067802e | 262 | struct net *net; |
26b15dad JHS |
263 | }; |
264 | ||
9fdc4883 SK |
265 | struct xfrm_replay { |
266 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
267 | int (*check)(struct xfrm_state *x, | |
268 | struct sk_buff *skb, | |
269 | __be32 net_seq); | |
3b59df46 SK |
270 | int (*recheck)(struct xfrm_state *x, |
271 | struct sk_buff *skb, | |
272 | __be32 net_seq); | |
9fdc4883 SK |
273 | void (*notify)(struct xfrm_state *x, int event); |
274 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
275 | }; | |
276 | ||
25ee3286 | 277 | struct net_device; |
1da177e4 LT |
278 | struct xfrm_type; |
279 | struct xfrm_dst; | |
280 | struct xfrm_policy_afinfo { | |
281 | unsigned short family; | |
1da177e4 | 282 | struct dst_ops *dst_ops; |
ddcfd796 | 283 | void (*garbage_collect)(struct net *net); |
42a7b32b DA |
284 | struct dst_entry *(*dst_lookup)(struct net *net, |
285 | int tos, int oif, | |
5e6b930f DM |
286 | const xfrm_address_t *saddr, |
287 | const xfrm_address_t *daddr); | |
42a7b32b DA |
288 | int (*get_saddr)(struct net *net, int oif, |
289 | xfrm_address_t *saddr, | |
290 | xfrm_address_t *daddr); | |
1da177e4 | 291 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
292 | struct flowi *fl, |
293 | int reverse); | |
05d84025 | 294 | int (*get_tos)(const struct flowi *fl); |
a1b05140 MN |
295 | int (*init_path)(struct xfrm_dst *path, |
296 | struct dst_entry *dst, | |
297 | int nfheader_len); | |
25ee3286 | 298 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 299 | struct net_device *dev, |
0c7b3eef | 300 | const struct flowi *fl); |
2774c131 | 301 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
302 | }; |
303 | ||
d511337a JP |
304 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
305 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
306 | void km_policy_notify(struct xfrm_policy *xp, int dir, | |
307 | const struct km_event *c); | |
308 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
309 | |
310 | struct xfrm_tmpl; | |
d511337a JP |
311 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
312 | struct xfrm_policy *pol); | |
313 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
314 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 315 | |
1da177e4 | 316 | struct xfrm_state_afinfo { |
17c2a42a | 317 | unsigned int family; |
36cf9acf | 318 | unsigned int proto; |
8e3d716c | 319 | __be16 eth_proto; |
17c2a42a | 320 | struct module *owner; |
533cb5b0 | 321 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 322 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 323 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
324 | void (*init_tempsel)(struct xfrm_selector *sel, |
325 | const struct flowi *fl); | |
19bd6244 DM |
326 | void (*init_temprop)(struct xfrm_state *x, |
327 | const struct xfrm_tmpl *tmpl, | |
328 | const xfrm_address_t *daddr, | |
329 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
330 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
331 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
ede2059d | 332 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 333 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); |
227620e2 HX |
334 | int (*extract_input)(struct xfrm_state *x, |
335 | struct sk_buff *skb); | |
36cf9acf HX |
336 | int (*extract_output)(struct xfrm_state *x, |
337 | struct sk_buff *skb); | |
716062fd HX |
338 | int (*transport_finish)(struct sk_buff *skb, |
339 | int async); | |
628e341f | 340 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
341 | }; |
342 | ||
d511337a JP |
343 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
344 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
345 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
346 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
1da177e4 | 347 | |
2f32b51b SK |
348 | struct xfrm_input_afinfo { |
349 | unsigned int family; | |
350 | struct module *owner; | |
351 | int (*callback)(struct sk_buff *skb, u8 protocol, | |
352 | int err); | |
353 | }; | |
354 | ||
355 | int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo); | |
356 | int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo); | |
357 | ||
d511337a | 358 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 359 | |
fd2c3ef7 | 360 | struct xfrm_type { |
1da177e4 LT |
361 | char *description; |
362 | struct module *owner; | |
a6337463 | 363 | u8 proto; |
364 | u8 flags; | |
1b5c2299 | 365 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 366 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
367 | #define XFRM_TYPE_LOCAL_COADDR 4 |
368 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 369 | |
72cb6962 | 370 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 371 | void (*destructor)(struct xfrm_state *); |
e695633e | 372 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 373 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
374 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
375 | const struct flowi *); | |
aee5adb4 | 376 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 377 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 378 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
379 | }; |
380 | ||
d511337a JP |
381 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
382 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 383 | |
b59f45d0 | 384 | struct xfrm_mode { |
227620e2 HX |
385 | /* |
386 | * Remove encapsulation header. | |
387 | * | |
388 | * The IP header will be moved over the top of the encapsulation | |
389 | * header. | |
390 | * | |
391 | * On entry, the transport header shall point to where the IP header | |
392 | * should be and the network header shall be set to where the IP | |
393 | * header currently is. skb->data shall point to the start of the | |
394 | * payload. | |
395 | */ | |
396 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
397 | ||
398 | /* | |
399 | * This is the actual input entry point. | |
400 | * | |
401 | * For transport mode and equivalent this would be identical to | |
402 | * input2 (which does not need to be set). While tunnel mode | |
403 | * and equivalent would set this to the tunnel encapsulation function | |
404 | * xfrm4_prepare_input that would in turn call input2. | |
405 | */ | |
b59f45d0 | 406 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
407 | |
408 | /* | |
409 | * Add encapsulation header. | |
410 | * | |
411 | * On exit, the transport header will be set to the start of the | |
412 | * encapsulation header to be filled in by x->type->output and | |
413 | * the mac header will be set to the nextheader (protocol for | |
414 | * IPv4) field of the extension header directly preceding the | |
415 | * encapsulation header, or in its absence, that of the top IP | |
416 | * header. The value of the network header will always point | |
417 | * to the top IP header while skb->data will point to the payload. | |
418 | */ | |
36cf9acf HX |
419 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
420 | ||
421 | /* | |
422 | * This is the actual output entry point. | |
423 | * | |
424 | * For transport mode and equivalent this would be identical to | |
425 | * output2 (which does not need to be set). While tunnel mode | |
426 | * and equivalent would set this to a tunnel encapsulation function | |
427 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
428 | * call output2. | |
429 | */ | |
430 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 431 | |
17c2a42a | 432 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
433 | struct module *owner; |
434 | unsigned int encap; | |
1bfcb10f HX |
435 | int flags; |
436 | }; | |
437 | ||
438 | /* Flags for xfrm_mode. */ | |
439 | enum { | |
440 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
441 | }; |
442 | ||
d511337a JP |
443 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
444 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 445 | |
df9dcb45 KM |
446 | static inline int xfrm_af2proto(unsigned int family) |
447 | { | |
448 | switch(family) { | |
449 | case AF_INET: | |
450 | return IPPROTO_IPIP; | |
451 | case AF_INET6: | |
452 | return IPPROTO_IPV6; | |
453 | default: | |
454 | return 0; | |
455 | } | |
456 | } | |
457 | ||
458 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
459 | { | |
460 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
461 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
462 | return x->inner_mode; | |
463 | else | |
464 | return x->inner_mode_iaf; | |
465 | } | |
466 | ||
fd2c3ef7 | 467 | struct xfrm_tmpl { |
1da177e4 LT |
468 | /* id in template is interpreted as: |
469 | * daddr - destination of tunnel, may be zero for transport mode. | |
470 | * spi - zero to acquire spi. Not zero if spi is static, then | |
471 | * daddr must be fixed too. | |
472 | * proto - AH/ESP/IPCOMP | |
473 | */ | |
474 | struct xfrm_id id; | |
475 | ||
476 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
477 | xfrm_address_t saddr; | |
478 | ||
76b3f055 MK |
479 | unsigned short encap_family; |
480 | ||
a6337463 | 481 | u32 reqid; |
1da177e4 | 482 | |
7e49e6de | 483 | /* Mode: transport, tunnel etc. */ |
a6337463 | 484 | u8 mode; |
1da177e4 LT |
485 | |
486 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 487 | u8 share; |
1da177e4 LT |
488 | |
489 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 490 | u8 optional; |
1da177e4 | 491 | |
c5d18e98 | 492 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 493 | u8 allalgs; |
c5d18e98 | 494 | |
1da177e4 | 495 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 496 | u32 aalgos; |
497 | u32 ealgos; | |
498 | u32 calgos; | |
1da177e4 LT |
499 | }; |
500 | ||
622dc828 | 501 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 502 | |
12a169e7 HX |
503 | struct xfrm_policy_walk_entry { |
504 | struct list_head all; | |
505 | u8 dead; | |
506 | }; | |
507 | ||
508 | struct xfrm_policy_walk { | |
509 | struct xfrm_policy_walk_entry walk; | |
510 | u8 type; | |
511 | u32 seq; | |
512 | }; | |
513 | ||
a0073fe1 SK |
514 | struct xfrm_policy_queue { |
515 | struct sk_buff_head hold_queue; | |
516 | struct timer_list hold_timer; | |
517 | unsigned long timeout; | |
518 | }; | |
519 | ||
fd2c3ef7 | 520 | struct xfrm_policy { |
0c5c9fb5 | 521 | possible_net_t xp_net; |
2518c7c2 DM |
522 | struct hlist_node bydst; |
523 | struct hlist_node byidx; | |
1da177e4 LT |
524 | |
525 | /* This lock only affects elements except for entry. */ | |
526 | rwlock_t lock; | |
527 | atomic_t refcnt; | |
528 | struct timer_list timer; | |
529 | ||
fe1a5f03 | 530 | struct flow_cache_object flo; |
80c802f3 | 531 | atomic_t genid; |
1da177e4 LT |
532 | u32 priority; |
533 | u32 index; | |
bf825f81 | 534 | struct xfrm_mark mark; |
1da177e4 LT |
535 | struct xfrm_selector selector; |
536 | struct xfrm_lifetime_cfg lft; | |
537 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 538 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 539 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
540 | u8 type; |
541 | u8 action; | |
542 | u8 flags; | |
46ca5f5d | 543 | u8 xfrm_nr; |
12a169e7 | 544 | u16 family; |
df71837d | 545 | struct xfrm_sec_ctx *security; |
1da177e4 | 546 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
56f04730 | 547 | struct rcu_head rcu; |
1da177e4 LT |
548 | }; |
549 | ||
63eb23f5 | 550 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
551 | { |
552 | return read_pnet(&xp->xp_net); | |
553 | } | |
554 | ||
13c1d189 AE |
555 | struct xfrm_kmaddress { |
556 | xfrm_address_t local; | |
557 | xfrm_address_t remote; | |
558 | u32 reserved; | |
559 | u16 family; | |
560 | }; | |
561 | ||
80c9abaa SS |
562 | struct xfrm_migrate { |
563 | xfrm_address_t old_daddr; | |
564 | xfrm_address_t old_saddr; | |
565 | xfrm_address_t new_daddr; | |
566 | xfrm_address_t new_saddr; | |
567 | u8 proto; | |
568 | u8 mode; | |
569 | u16 reserved; | |
570 | u32 reqid; | |
571 | u16 old_family; | |
572 | u16 new_family; | |
573 | }; | |
574 | ||
f8cd5488 | 575 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
576 | /* what happened */ |
577 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
578 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
579 | ||
580 | /* default aevent timeout in units of 100ms */ | |
581 | #define XFRM_AE_ETIME 10 | |
582 | /* Async Event timer multiplier */ | |
583 | #define XFRM_AE_ETH_M 10 | |
584 | /* default seq threshold size */ | |
585 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 586 | |
fd2c3ef7 | 587 | struct xfrm_mgr { |
1da177e4 LT |
588 | struct list_head list; |
589 | char *id; | |
214e005b | 590 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 591 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 592 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 593 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 594 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 595 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
596 | int (*migrate)(const struct xfrm_selector *sel, |
597 | u8 dir, u8 type, | |
598 | const struct xfrm_migrate *m, | |
599 | int num_bundles, | |
600 | const struct xfrm_kmaddress *k); | |
0f24558e | 601 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
602 | }; |
603 | ||
d511337a JP |
604 | int xfrm_register_km(struct xfrm_mgr *km); |
605 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 606 | |
70be6c91 SK |
607 | struct xfrm_tunnel_skb_cb { |
608 | union { | |
609 | struct inet_skb_parm h4; | |
610 | struct inet6_skb_parm h6; | |
611 | } header; | |
612 | ||
613 | union { | |
614 | struct ip_tunnel *ip4; | |
615 | struct ip6_tnl *ip6; | |
616 | } tunnel; | |
617 | }; | |
618 | ||
619 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
620 | ||
436a0a40 HX |
621 | /* |
622 | * This structure is used for the duration where packets are being | |
623 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
624 | * area beyond the generic IP part may be overwritten. | |
625 | */ | |
626 | struct xfrm_skb_cb { | |
70be6c91 | 627 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
628 | |
629 | /* Sequence number for replay protection. */ | |
b318e0e4 | 630 | union { |
1ce3644a SK |
631 | struct { |
632 | __u32 low; | |
633 | __u32 hi; | |
634 | } output; | |
635 | struct { | |
636 | __be32 low; | |
637 | __be32 hi; | |
638 | } input; | |
b318e0e4 | 639 | } seq; |
436a0a40 HX |
640 | }; |
641 | ||
642 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
643 | ||
36cf9acf HX |
644 | /* |
645 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
646 | * to transmit header information to the mode input/output functions. | |
647 | */ | |
648 | struct xfrm_mode_skb_cb { | |
70be6c91 | 649 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
650 | |
651 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
652 | __be16 id; | |
653 | __be16 frag_off; | |
654 | ||
732c8bd5 HX |
655 | /* IP header length (excluding options or extension headers). */ |
656 | u8 ihl; | |
657 | ||
36cf9acf HX |
658 | /* TOS for IPv4, class for IPv6. */ |
659 | u8 tos; | |
660 | ||
661 | /* TTL for IPv4, hop limitfor IPv6. */ | |
662 | u8 ttl; | |
663 | ||
664 | /* Protocol for IPv4, NH for IPv6. */ | |
665 | u8 protocol; | |
666 | ||
732c8bd5 HX |
667 | /* Option length for IPv4, zero for IPv6. */ |
668 | u8 optlen; | |
669 | ||
36cf9acf HX |
670 | /* Used by IPv6 only, zero for IPv4. */ |
671 | u8 flow_lbl[3]; | |
672 | }; | |
673 | ||
674 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
675 | ||
716062fd HX |
676 | /* |
677 | * This structure is used by the input processing to locate the SPI and | |
678 | * related information. | |
679 | */ | |
680 | struct xfrm_spi_skb_cb { | |
70be6c91 | 681 | struct xfrm_tunnel_skb_cb header; |
716062fd | 682 | |
716062fd | 683 | unsigned int daddroff; |
2fcb45b6 | 684 | unsigned int family; |
716062fd HX |
685 | }; |
686 | ||
687 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
688 | ||
c9204d9c | 689 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 690 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
691 | { |
692 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 693 | |
afeb14b4 PM |
694 | if (audit_enabled == 0) |
695 | return NULL; | |
ab5f5e8b | 696 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 697 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
698 | if (audit_buf == NULL) |
699 | return NULL; | |
afeb14b4 PM |
700 | audit_log_format(audit_buf, "op=%s", op); |
701 | return audit_buf; | |
702 | } | |
ab5f5e8b | 703 | |
2e71029e | 704 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
705 | struct audit_buffer *audit_buf) |
706 | { | |
2e71029e TH |
707 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
708 | audit_get_loginuid(current) : | |
709 | INVALID_UID); | |
710 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
711 | (unsigned int) -1; | |
712 | ||
713 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 714 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
715 | } |
716 | ||
2e71029e TH |
717 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
718 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
719 | bool task_valid); | |
720 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
721 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
722 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
723 | struct sk_buff *skb); | |
724 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
725 | __be32 net_seq); | |
726 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
727 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
728 | __be32 net_seq); | |
729 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
730 | u8 proto); | |
c9204d9c | 731 | #else |
41fef0ee MS |
732 | |
733 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 734 | bool task_valid) |
41fef0ee MS |
735 | { |
736 | } | |
737 | ||
738 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 739 | bool task_valid) |
41fef0ee MS |
740 | { |
741 | } | |
742 | ||
743 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 744 | bool task_valid) |
41fef0ee MS |
745 | { |
746 | } | |
747 | ||
748 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 749 | bool task_valid) |
41fef0ee MS |
750 | { |
751 | } | |
752 | ||
753 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
754 | struct sk_buff *skb) | |
755 | { | |
756 | } | |
757 | ||
9fdc4883 SK |
758 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
759 | struct sk_buff *skb, __be32 net_seq) | |
760 | { | |
761 | } | |
762 | ||
41fef0ee MS |
763 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
764 | u16 family) | |
765 | { | |
766 | } | |
767 | ||
768 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
769 | __be32 net_spi, __be32 net_seq) | |
770 | { | |
771 | } | |
772 | ||
773 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
774 | struct sk_buff *skb, u8 proto) | |
775 | { | |
776 | } | |
c9204d9c | 777 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 778 | |
1da177e4 LT |
779 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
780 | { | |
781 | if (likely(policy != NULL)) | |
782 | atomic_inc(&policy->refcnt); | |
783 | } | |
784 | ||
d511337a | 785 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
786 | |
787 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
788 | { | |
789 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 790 | xfrm_policy_destroy(policy); |
1da177e4 LT |
791 | } |
792 | ||
4e81bb83 MN |
793 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
794 | { | |
795 | int i; | |
796 | for (i = npols - 1; i >= 0; --i) | |
797 | xfrm_pol_put(pols[i]); | |
798 | } | |
4e81bb83 | 799 | |
d511337a | 800 | void __xfrm_state_destroy(struct xfrm_state *); |
1da177e4 | 801 | |
21380b81 HX |
802 | static inline void __xfrm_state_put(struct xfrm_state *x) |
803 | { | |
804 | atomic_dec(&x->refcnt); | |
805 | } | |
806 | ||
1da177e4 LT |
807 | static inline void xfrm_state_put(struct xfrm_state *x) |
808 | { | |
809 | if (atomic_dec_and_test(&x->refcnt)) | |
810 | __xfrm_state_destroy(x); | |
811 | } | |
812 | ||
813 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
814 | { | |
815 | atomic_inc(&x->refcnt); | |
816 | } | |
817 | ||
1744a8fe DM |
818 | static inline bool addr_match(const void *token1, const void *token2, |
819 | int prefixlen) | |
1da177e4 | 820 | { |
1744a8fe DM |
821 | const __be32 *a1 = token1; |
822 | const __be32 *a2 = token2; | |
1da177e4 LT |
823 | int pdw; |
824 | int pbi; | |
825 | ||
a6337463 | 826 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
827 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
828 | ||
829 | if (pdw) | |
830 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 831 | return false; |
1da177e4 LT |
832 | |
833 | if (pbi) { | |
5f19343f | 834 | __be32 mask; |
1da177e4 LT |
835 | |
836 | mask = htonl((0xffffffff) << (32 - pbi)); | |
837 | ||
838 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 839 | return false; |
1da177e4 LT |
840 | } |
841 | ||
1744a8fe | 842 | return true; |
1da177e4 LT |
843 | } |
844 | ||
26bff940 AD |
845 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
846 | { | |
847 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
848 | if (prefixlen == 0) | |
849 | return true; | |
850 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
851 | } | |
852 | ||
1da177e4 | 853 | static __inline__ |
6281dcc9 | 854 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 855 | { |
f9d07e41 | 856 | __be16 port; |
1d28f42c | 857 | switch(fl->flowi_proto) { |
1da177e4 LT |
858 | case IPPROTO_TCP: |
859 | case IPPROTO_UDP: | |
ba4e58ec | 860 | case IPPROTO_UDPLITE: |
1da177e4 | 861 | case IPPROTO_SCTP: |
6281dcc9 | 862 | port = uli->ports.sport; |
1da177e4 LT |
863 | break; |
864 | case IPPROTO_ICMP: | |
865 | case IPPROTO_ICMPV6: | |
6281dcc9 | 866 | port = htons(uli->icmpt.type); |
1da177e4 | 867 | break; |
2ce4272a | 868 | case IPPROTO_MH: |
6281dcc9 | 869 | port = htons(uli->mht.type); |
2ce4272a | 870 | break; |
cc9ff19d | 871 | case IPPROTO_GRE: |
6281dcc9 | 872 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 873 | break; |
1da177e4 LT |
874 | default: |
875 | port = 0; /*XXX*/ | |
876 | } | |
877 | return port; | |
878 | } | |
879 | ||
880 | static __inline__ | |
6281dcc9 | 881 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 882 | { |
f9d07e41 | 883 | __be16 port; |
1d28f42c | 884 | switch(fl->flowi_proto) { |
1da177e4 LT |
885 | case IPPROTO_TCP: |
886 | case IPPROTO_UDP: | |
ba4e58ec | 887 | case IPPROTO_UDPLITE: |
1da177e4 | 888 | case IPPROTO_SCTP: |
6281dcc9 | 889 | port = uli->ports.dport; |
1da177e4 LT |
890 | break; |
891 | case IPPROTO_ICMP: | |
892 | case IPPROTO_ICMPV6: | |
6281dcc9 | 893 | port = htons(uli->icmpt.code); |
1da177e4 | 894 | break; |
cc9ff19d | 895 | case IPPROTO_GRE: |
6281dcc9 | 896 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 897 | break; |
1da177e4 LT |
898 | default: |
899 | port = 0; /*XXX*/ | |
900 | } | |
901 | return port; | |
902 | } | |
903 | ||
d511337a JP |
904 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
905 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 906 | |
df71837d TJ |
907 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
908 | /* If neither has a context --> match | |
909 | * Otherwise, both must have a context and the sids, doi, alg must match | |
910 | */ | |
bc9b35ad | 911 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
912 | { |
913 | return ((!s1 && !s2) || | |
914 | (s1 && s2 && | |
915 | (s1->ctx_sid == s2->ctx_sid) && | |
916 | (s1->ctx_doi == s2->ctx_doi) && | |
917 | (s1->ctx_alg == s2->ctx_alg))); | |
918 | } | |
919 | #else | |
bc9b35ad | 920 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 921 | { |
bc9b35ad | 922 | return true; |
df71837d TJ |
923 | } |
924 | #endif | |
925 | ||
1da177e4 LT |
926 | /* A struct encoding bundle of transformations to apply to some set of flow. |
927 | * | |
928 | * dst->child points to the next element of bundle. | |
929 | * dst->xfrm points to an instanse of transformer. | |
930 | * | |
931 | * Due to unfortunate limitations of current routing cache, which we | |
932 | * have no time to fix, it mirrors struct rtable and bound to the same | |
933 | * routing key, including saddr,daddr. However, we can have many of | |
934 | * bundles differing by session id. All the bundles grow from a parent | |
935 | * policy rule. | |
936 | */ | |
fd2c3ef7 | 937 | struct xfrm_dst { |
1da177e4 | 938 | union { |
1da177e4 LT |
939 | struct dst_entry dst; |
940 | struct rtable rt; | |
941 | struct rt6_info rt6; | |
942 | } u; | |
943 | struct dst_entry *route; | |
80c802f3 TT |
944 | struct flow_cache_object flo; |
945 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
946 | int num_pols, num_xfrms; | |
157bfc25 MN |
947 | #ifdef CONFIG_XFRM_SUB_POLICY |
948 | struct flowi *origin; | |
949 | struct xfrm_selector *partner; | |
950 | #endif | |
80c802f3 TT |
951 | u32 xfrm_genid; |
952 | u32 policy_genid; | |
1da177e4 LT |
953 | u32 route_mtu_cached; |
954 | u32 child_mtu_cached; | |
92d63dec HY |
955 | u32 route_cookie; |
956 | u32 path_cookie; | |
1da177e4 LT |
957 | }; |
958 | ||
def8b4fa | 959 | #ifdef CONFIG_XFRM |
aabc9761 HX |
960 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
961 | { | |
80c802f3 | 962 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
963 | dst_release(xdst->route); |
964 | if (likely(xdst->u.dst.xfrm)) | |
965 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
966 | #ifdef CONFIG_XFRM_SUB_POLICY |
967 | kfree(xdst->origin); | |
968 | xdst->origin = NULL; | |
969 | kfree(xdst->partner); | |
970 | xdst->partner = NULL; | |
971 | #endif | |
aabc9761 | 972 | } |
def8b4fa | 973 | #endif |
aabc9761 | 974 | |
d511337a | 975 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 976 | |
fd2c3ef7 | 977 | struct sec_path { |
1da177e4 LT |
978 | atomic_t refcnt; |
979 | int len; | |
dbe5b4aa | 980 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
981 | }; |
982 | ||
990078af MS |
983 | static inline int secpath_exists(struct sk_buff *skb) |
984 | { | |
985 | #ifdef CONFIG_XFRM | |
986 | return skb->sp != NULL; | |
987 | #else | |
988 | return 0; | |
989 | #endif | |
990 | } | |
991 | ||
1da177e4 LT |
992 | static inline struct sec_path * |
993 | secpath_get(struct sec_path *sp) | |
994 | { | |
995 | if (sp) | |
996 | atomic_inc(&sp->refcnt); | |
997 | return sp; | |
998 | } | |
999 | ||
d511337a | 1000 | void __secpath_destroy(struct sec_path *sp); |
1da177e4 LT |
1001 | |
1002 | static inline void | |
1003 | secpath_put(struct sec_path *sp) | |
1004 | { | |
1005 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
1006 | __secpath_destroy(sp); | |
1007 | } | |
1008 | ||
d511337a | 1009 | struct sec_path *secpath_dup(struct sec_path *src); |
1da177e4 LT |
1010 | |
1011 | static inline void | |
1012 | secpath_reset(struct sk_buff *skb) | |
1013 | { | |
1014 | #ifdef CONFIG_XFRM | |
1015 | secpath_put(skb->sp); | |
1016 | skb->sp = NULL; | |
1017 | #endif | |
1018 | } | |
1019 | ||
a1e59abf | 1020 | static inline int |
6cc32961 | 1021 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1022 | { |
1023 | switch (family) { | |
1024 | case AF_INET: | |
1025 | return addr->a4 == 0; | |
1026 | case AF_INET6: | |
15e318bd | 1027 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1028 | } |
1029 | return 0; | |
1030 | } | |
1031 | ||
1da177e4 | 1032 | static inline int |
21eddb5c | 1033 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1034 | { |
1035 | return (tmpl->saddr.a4 && | |
1036 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1037 | } | |
1038 | ||
1039 | static inline int | |
21eddb5c | 1040 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1041 | { |
1042 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1043 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1044 | } |
1045 | ||
1046 | static inline int | |
21eddb5c | 1047 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1048 | { |
1049 | switch (family) { | |
1050 | case AF_INET: | |
1051 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1052 | case AF_INET6: | |
1053 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1054 | } | |
1055 | return !0; | |
1056 | } | |
1057 | ||
1058 | #ifdef CONFIG_XFRM | |
d511337a JP |
1059 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1060 | unsigned short family); | |
1da177e4 | 1061 | |
d5422efe HX |
1062 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1063 | struct sk_buff *skb, | |
1064 | unsigned int family, int reverse) | |
1da177e4 | 1065 | { |
f6e1e25d | 1066 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1067 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1068 | ||
1da177e4 | 1069 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1070 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1071 | |
f6e1e25d | 1072 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1073 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1074 | __xfrm_policy_check(sk, ndir, skb, family); |
1075 | } | |
1076 | ||
1077 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1078 | { | |
1079 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1080 | } |
1081 | ||
1082 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1083 | { | |
1084 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1085 | } | |
1086 | ||
1087 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1088 | { | |
1089 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1090 | } | |
1091 | ||
d5422efe HX |
1092 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1093 | struct sk_buff *skb) | |
1094 | { | |
1095 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1096 | } | |
1097 | ||
1098 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1099 | struct sk_buff *skb) | |
1100 | { | |
1101 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1102 | } | |
1103 | ||
d511337a JP |
1104 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1105 | unsigned int family, int reverse); | |
d5422efe HX |
1106 | |
1107 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1108 | unsigned int family) | |
1109 | { | |
1110 | return __xfrm_decode_session(skb, fl, family, 0); | |
1111 | } | |
1112 | ||
1113 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1114 | struct flowi *fl, | |
1115 | unsigned int family) | |
1116 | { | |
1117 | return __xfrm_decode_session(skb, fl, family, 1); | |
1118 | } | |
1119 | ||
d511337a | 1120 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1121 | |
1122 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1123 | { | |
99a66657 AD |
1124 | struct net *net = dev_net(skb->dev); |
1125 | ||
1126 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1127 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1128 | __xfrm_route_forward(skb, family); |
1129 | } | |
1130 | ||
1131 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1132 | { | |
1133 | return xfrm_route_forward(skb, AF_INET); | |
1134 | } | |
1135 | ||
1136 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1137 | { | |
1138 | return xfrm_route_forward(skb, AF_INET6); | |
1139 | } | |
1140 | ||
d188ba86 | 1141 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1142 | |
d188ba86 | 1143 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1144 | { |
d188ba86 ED |
1145 | sk->sk_policy[0] = NULL; |
1146 | sk->sk_policy[1] = NULL; | |
1147 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1148 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1149 | return 0; |
1150 | } | |
1151 | ||
d511337a | 1152 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1153 | |
1154 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1155 | { | |
d188ba86 ED |
1156 | struct xfrm_policy *pol; |
1157 | ||
1158 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1159 | if (unlikely(pol != NULL)) { | |
1160 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1161 | sk->sk_policy[0] = NULL; |
1162 | } | |
d188ba86 ED |
1163 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1164 | if (unlikely(pol != NULL)) { | |
1165 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1166 | sk->sk_policy[1] = NULL; |
1167 | } | |
1168 | } | |
1169 | ||
d511337a | 1170 | void xfrm_garbage_collect(struct net *net); |
e4c17216 | 1171 | |
1da177e4 LT |
1172 | #else |
1173 | ||
1174 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1175 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
1da177e4 LT |
1176 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1177 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1178 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1179 | { | |
1180 | return 1; | |
1181 | } | |
1182 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1183 | { | |
1184 | return 1; | |
1185 | } | |
1186 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1187 | { | |
1188 | return 1; | |
1189 | } | |
d5422efe HX |
1190 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1191 | struct flowi *fl, | |
1192 | unsigned int family) | |
1193 | { | |
1194 | return -ENOSYS; | |
1195 | } | |
1196 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1197 | struct sk_buff *skb) | |
1198 | { | |
1199 | return 1; | |
1200 | } | |
1201 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1202 | struct sk_buff *skb) | |
1203 | { | |
1204 | return 1; | |
1205 | } | |
e4c17216 PM |
1206 | static inline void xfrm_garbage_collect(struct net *net) |
1207 | { | |
1208 | } | |
1da177e4 LT |
1209 | #endif |
1210 | ||
1211 | static __inline__ | |
e8a4e377 | 1212 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1213 | { |
1214 | switch (family){ | |
1215 | case AF_INET: | |
7e1dc7b6 | 1216 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1217 | case AF_INET6: |
7e1dc7b6 | 1218 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1219 | } |
1220 | return NULL; | |
1221 | } | |
1222 | ||
1223 | static __inline__ | |
e8a4e377 | 1224 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1225 | { |
1226 | switch (family){ | |
1227 | case AF_INET: | |
7e1dc7b6 | 1228 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1229 | case AF_INET6: |
7e1dc7b6 | 1230 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1231 | } |
1232 | return NULL; | |
1233 | } | |
1234 | ||
9bb182a7 | 1235 | static __inline__ |
e8a4e377 | 1236 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1237 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1238 | unsigned short family) | |
1239 | { | |
1240 | switch(family) { | |
1241 | case AF_INET: | |
7e1dc7b6 DM |
1242 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1243 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1244 | break; |
1245 | case AF_INET6: | |
15e318bd JB |
1246 | saddr->in6 = fl->u.ip6.saddr; |
1247 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1248 | break; |
1249 | } | |
1250 | } | |
1251 | ||
1da177e4 | 1252 | static __inline__ int |
f8848067 DM |
1253 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1254 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1255 | { |
1256 | if (daddr->a4 == x->id.daddr.a4 && | |
1257 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1258 | return 1; | |
1259 | return 0; | |
1260 | } | |
1261 | ||
1262 | static __inline__ int | |
f8848067 DM |
1263 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1264 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1265 | { |
ff88b30c YH |
1266 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1267 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1268 | ipv6_addr_any((struct in6_addr *)saddr) || |
1269 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1270 | return 1; | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static __inline__ int | |
f8848067 DM |
1275 | xfrm_state_addr_check(const struct xfrm_state *x, |
1276 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1277 | unsigned short family) |
1278 | { | |
1279 | switch (family) { | |
1280 | case AF_INET: | |
1281 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1282 | case AF_INET6: | |
1283 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1284 | } | |
1285 | return 0; | |
1286 | } | |
1287 | ||
e53820de | 1288 | static __inline__ int |
f8848067 | 1289 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1290 | unsigned short family) |
1291 | { | |
1292 | switch (family) { | |
1293 | case AF_INET: | |
1294 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1295 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1296 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1297 | case AF_INET6: |
1298 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1299 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1300 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1301 | } |
1302 | return 0; | |
1303 | } | |
1304 | ||
f8848067 | 1305 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1306 | { |
1307 | return atomic_read(&x->tunnel_users); | |
1308 | } | |
1309 | ||
5794708f MN |
1310 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1311 | { | |
dc00a525 MN |
1312 | return (!userproto || proto == userproto || |
1313 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1314 | proto == IPPROTO_ESP || | |
1315 | proto == IPPROTO_COMP))); | |
5794708f MN |
1316 | } |
1317 | ||
1da177e4 LT |
1318 | /* |
1319 | * xfrm algorithm information | |
1320 | */ | |
1a6509d9 | 1321 | struct xfrm_algo_aead_info { |
165ecc63 | 1322 | char *geniv; |
1a6509d9 HX |
1323 | u16 icv_truncbits; |
1324 | }; | |
1325 | ||
1da177e4 LT |
1326 | struct xfrm_algo_auth_info { |
1327 | u16 icv_truncbits; | |
1328 | u16 icv_fullbits; | |
1329 | }; | |
1330 | ||
1331 | struct xfrm_algo_encr_info { | |
165ecc63 | 1332 | char *geniv; |
1da177e4 LT |
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 | ||
7e14ea15 | 1367 | struct xfrm6_protocol { |
1da177e4 | 1368 | int (*handler)(struct sk_buff *skb); |
7e14ea15 SK |
1369 | int (*cb_handler)(struct sk_buff *skb, int err); |
1370 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1371 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1372 | |
7e14ea15 | 1373 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1374 | int priority; |
1da177e4 LT |
1375 | }; |
1376 | ||
1da177e4 LT |
1377 | /* XFRM tunnel handlers. */ |
1378 | struct xfrm_tunnel { | |
aba82695 | 1379 | int (*handler)(struct sk_buff *skb); |
a6337463 | 1380 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1381 | |
b33eab08 | 1382 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1383 | int priority; |
1384 | }; | |
1385 | ||
1da177e4 | 1386 | struct xfrm6_tunnel { |
d2acc347 HX |
1387 | int (*handler)(struct sk_buff *skb); |
1388 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1389 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1390 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1391 | int priority; |
1da177e4 LT |
1392 | }; |
1393 | ||
d511337a JP |
1394 | void xfrm_init(void); |
1395 | void xfrm4_init(void); | |
1396 | int xfrm_state_init(struct net *net); | |
1397 | void xfrm_state_fini(struct net *net); | |
1398 | void xfrm4_state_init(void); | |
2f32b51b | 1399 | void xfrm4_protocol_init(void); |
c35b7e72 | 1400 | #ifdef CONFIG_XFRM |
d511337a JP |
1401 | int xfrm6_init(void); |
1402 | void xfrm6_fini(void); | |
1403 | int xfrm6_state_init(void); | |
1404 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1405 | int xfrm6_protocol_init(void); |
1406 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1407 | #else |
1408 | static inline int xfrm6_init(void) | |
1409 | { | |
1410 | return 0; | |
1411 | } | |
1412 | static inline void xfrm6_fini(void) | |
1413 | { | |
1414 | ; | |
1415 | } | |
1416 | #endif | |
1da177e4 | 1417 | |
558f82ef | 1418 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1419 | int xfrm_proc_init(struct net *net); |
1420 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1421 | #endif |
1422 | ||
d511337a | 1423 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1424 | #ifdef CONFIG_SYSCTL |
d511337a | 1425 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1426 | #else |
1427 | static inline void xfrm_sysctl_fini(struct net *net) | |
1428 | { | |
1429 | } | |
1430 | #endif | |
1431 | ||
d3623099 | 1432 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1433 | struct xfrm_address_filter *filter); |
d511337a JP |
1434 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1435 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1436 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a JP |
1437 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1438 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, | |
1439 | const xfrm_address_t *saddr, | |
1440 | const struct flowi *fl, | |
1441 | struct xfrm_tmpl *tmpl, | |
1442 | struct xfrm_policy *pol, int *err, | |
1443 | unsigned short family); | |
1444 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, | |
1445 | xfrm_address_t *daddr, | |
1446 | xfrm_address_t *saddr, | |
1447 | unsigned short family, | |
1448 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1449 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1450 | unsigned short family); | |
d511337a JP |
1451 | int xfrm_state_check_expire(struct xfrm_state *x); |
1452 | void xfrm_state_insert(struct xfrm_state *x); | |
1453 | int xfrm_state_add(struct xfrm_state *x); | |
1454 | int xfrm_state_update(struct xfrm_state *x); | |
1455 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1456 | const xfrm_address_t *daddr, __be32 spi, | |
1457 | u8 proto, unsigned short family); | |
1458 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1459 | const xfrm_address_t *daddr, | |
1460 | const xfrm_address_t *saddr, | |
1461 | u8 proto, | |
1462 | unsigned short family); | |
41a49cc3 | 1463 | #ifdef CONFIG_XFRM_SUB_POLICY |
d511337a | 1464 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
283bc9f3 | 1465 | unsigned short family, struct net *net); |
d511337a JP |
1466 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1467 | unsigned short family); | |
41a49cc3 MN |
1468 | #else |
1469 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
283bc9f3 | 1470 | int n, unsigned short family, struct net *net) |
41a49cc3 MN |
1471 | { |
1472 | return -ENOSYS; | |
1473 | } | |
1474 | ||
1475 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1476 | int n, unsigned short family) | |
1477 | { | |
1478 | return -ENOSYS; | |
1479 | } | |
1480 | #endif | |
af11e316 JHS |
1481 | |
1482 | struct xfrmk_sadinfo { | |
1483 | u32 sadhcnt; /* current hash bkts */ | |
1484 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1485 | u32 sadcnt; /* current running count */ | |
1486 | }; | |
1487 | ||
5a6d3416 JHS |
1488 | struct xfrmk_spdinfo { |
1489 | u32 incnt; | |
1490 | u32 outcnt; | |
1491 | u32 fwdcnt; | |
1492 | u32 inscnt; | |
1493 | u32 outscnt; | |
1494 | u32 fwdscnt; | |
1495 | u32 spdhcnt; | |
1496 | u32 spdhmcnt; | |
1497 | }; | |
1498 | ||
d511337a JP |
1499 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1500 | int xfrm_state_delete(struct xfrm_state *x); | |
2e71029e | 1501 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); |
d511337a JP |
1502 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1503 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1504 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1505 | int xfrm_init_replay(struct xfrm_state *x); | |
1506 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
1507 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay); | |
1508 | int xfrm_init_state(struct xfrm_state *x); | |
1509 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1510 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1511 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
1512 | int xfrm_output_resume(struct sk_buff *skb, int err); | |
7026b1dd | 1513 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1514 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1515 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1516 | int xfrm4_extract_header(struct sk_buff *skb); | |
1517 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1518 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1519 | int encap_type); | |
1520 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1521 | int xfrm4_rcv(struct sk_buff *skb); | |
c4541b41 HX |
1522 | |
1523 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1524 | { | |
70be6c91 | 1525 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1526 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1527 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1528 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1529 | } |
1530 | ||
d511337a JP |
1531 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1532 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1533 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1534 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1535 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1536 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); | |
1537 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1538 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1539 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a JP |
1540 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1541 | int xfrm6_extract_header(struct sk_buff *skb); | |
1542 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1543 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); | |
1544 | int xfrm6_transport_finish(struct sk_buff *skb, int async); | |
1545 | int xfrm6_rcv(struct sk_buff *skb); | |
1546 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1547 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1548 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1549 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1550 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); | |
1551 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1552 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1553 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1554 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1555 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1556 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1557 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1558 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1559 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1560 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1561 | u8 **prevhdr); | |
1da177e4 LT |
1562 | |
1563 | #ifdef CONFIG_XFRM | |
d511337a JP |
1564 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1565 | int xfrm_user_policy(struct sock *sk, int optname, | |
1566 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1567 | #else |
1568 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1569 | { | |
1570 | return -ENOPROTOOPT; | |
1571 | } | |
1572 | ||
067b207b | 1573 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1574 | { |
1575 | /* should not happen */ | |
1576 | kfree_skb(skb); | |
1577 | return 0; | |
1578 | } | |
1da177e4 LT |
1579 | #endif |
1580 | ||
0331b1f3 | 1581 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1582 | |
d511337a JP |
1583 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1584 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1585 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1586 | void *); | |
283bc9f3 | 1587 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1588 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1589 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1590 | u8 type, int dir, | |
4e81bb83 | 1591 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1592 | struct xfrm_sec_ctx *ctx, int delete, |
1593 | int *err); | |
d511337a JP |
1594 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
1595 | u32 id, int delete, int *err); | |
2e71029e | 1596 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1597 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1598 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1599 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1600 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1601 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1602 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1603 | const xfrm_address_t *daddr, |
1604 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1605 | unsigned short family); |
d511337a | 1606 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1607 | |
80c9abaa | 1608 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1609 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1610 | const struct xfrm_migrate *m, int num_bundles, | |
1611 | const struct xfrm_kmaddress *k); | |
283bc9f3 | 1612 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a JP |
1613 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1614 | struct xfrm_migrate *m); | |
1615 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, | |
1616 | struct xfrm_migrate *m, int num_bundles, | |
8d549c4f | 1617 | struct xfrm_kmaddress *k, struct net *net); |
80c9abaa SS |
1618 | #endif |
1619 | ||
d511337a JP |
1620 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1621 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1622 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1623 | xfrm_address_t *addr); | |
1624 | ||
1625 | void xfrm_input_init(void); | |
1626 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1627 | ||
1628 | void xfrm_probe_algs(void); | |
1629 | int xfrm_count_pfkey_auth_supported(void); | |
1630 | int xfrm_count_pfkey_enc_supported(void); | |
1631 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1632 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1633 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1634 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1635 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1636 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1637 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1638 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1639 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1640 | int probe); | |
1da177e4 | 1641 | |
70e94e66 YH |
1642 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1643 | const xfrm_address_t *b) | |
1644 | { | |
1645 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1646 | (const struct in6_addr *)b); | |
1647 | } | |
1648 | ||
1649 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1650 | const xfrm_address_t *b, | |
1651 | sa_family_t family) | |
1da177e4 LT |
1652 | { |
1653 | switch (family) { | |
1654 | default: | |
1655 | case AF_INET: | |
70e94e66 | 1656 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1657 | case AF_INET6: |
70e94e66 | 1658 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1659 | } |
1660 | } | |
1661 | ||
77d8d7a6 HX |
1662 | static inline int xfrm_policy_id2dir(u32 index) |
1663 | { | |
1664 | return index & 7; | |
1665 | } | |
1666 | ||
a6483b79 AD |
1667 | #ifdef CONFIG_XFRM |
1668 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1669 | { |
be33690d PM |
1670 | struct sock *nlsk; |
1671 | int ret = 0; | |
1672 | ||
1673 | rcu_read_lock(); | |
a6483b79 | 1674 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1675 | if (nlsk) |
1676 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1677 | rcu_read_unlock(); | |
1678 | return ret; | |
f8cd5488 | 1679 | } |
0f24558e HG |
1680 | |
1681 | static inline int xfrm_acquire_is_on(struct net *net) | |
1682 | { | |
1683 | struct sock *nlsk; | |
1684 | int ret = 0; | |
1685 | ||
1686 | rcu_read_lock(); | |
1687 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1688 | if (nlsk) | |
1689 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1690 | rcu_read_unlock(); | |
1691 | ||
1692 | return ret; | |
1693 | } | |
a6483b79 | 1694 | #endif |
f8cd5488 | 1695 | |
ee5c2317 SK |
1696 | static inline int aead_len(struct xfrm_algo_aead *alg) |
1697 | { | |
1698 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1699 | } | |
1700 | ||
85158621 | 1701 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1702 | { |
1703 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1704 | } | |
1705 | ||
85158621 | 1706 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1707 | { |
1708 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1709 | } | |
1710 | ||
9736acf3 SK |
1711 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1712 | { | |
1713 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1714 | } | |
1715 | ||
80c9abaa | 1716 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1717 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1718 | struct xfrm_state *orig) | |
1719 | { | |
1720 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1721 | GFP_KERNEL); | |
1722 | if (!x->replay_esn) | |
1723 | return -ENOMEM; | |
1724 | ||
1725 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1726 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1727 | ||
1728 | x->preplay_esn = kmemdup(x->replay_esn, | |
1729 | xfrm_replay_state_esn_len(x->replay_esn), | |
1730 | GFP_KERNEL); | |
1731 | if (!x->preplay_esn) { | |
1732 | kfree(x->replay_esn); | |
1733 | return -ENOMEM; | |
1734 | } | |
1735 | ||
1736 | return 0; | |
1737 | } | |
1738 | ||
ee5c2317 SK |
1739 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1740 | { | |
1741 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1742 | } | |
1743 | ||
1744 | ||
80c9abaa SS |
1745 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1746 | { | |
0f99be0d | 1747 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1748 | } |
1749 | ||
4447bb33 MW |
1750 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1751 | { | |
1752 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1753 | } | |
1754 | ||
80c9abaa SS |
1755 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1756 | { | |
1757 | int i; | |
1758 | for (i = 0; i < n; i++) | |
1759 | xfrm_state_put(*(states + i)); | |
1760 | } | |
1761 | ||
1762 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1763 | { | |
1764 | int i; | |
1765 | for (i = 0; i < n; i++) | |
1766 | xfrm_state_delete(*(states + i)); | |
1767 | } | |
1768 | #endif | |
f8cd5488 | 1769 | |
def8b4fa | 1770 | #ifdef CONFIG_XFRM |
00501121 HX |
1771 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1772 | { | |
1773 | return skb->sp->xvec[skb->sp->len - 1]; | |
1774 | } | |
def8b4fa | 1775 | #endif |
00501121 | 1776 | |
bf825f81 JHS |
1777 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1778 | { | |
1779 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1780 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1781 | else |
1782 | m->v = m->m = 0; | |
1783 | ||
1784 | return m->v & m->m; | |
1785 | } | |
1786 | ||
e3dfa389 | 1787 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1788 | { |
1d1e34dd | 1789 | int ret = 0; |
bf825f81 | 1790 | |
1d1e34dd DM |
1791 | if (m->m | m->v) |
1792 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1793 | return ret; | |
bf825f81 JHS |
1794 | } |
1795 | ||
70be6c91 SK |
1796 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
1797 | unsigned int family) | |
1798 | { | |
1799 | bool tunnel = false; | |
1800 | ||
1801 | switch(family) { | |
1802 | case AF_INET: | |
1803 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1804 | tunnel = true; | |
1805 | break; | |
1806 | case AF_INET6: | |
1807 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1808 | tunnel = true; | |
1809 | break; | |
1810 | } | |
1811 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
1812 | return -EINVAL; | |
1813 | ||
1814 | return 0; | |
1815 | } | |
1da177e4 | 1816 | #endif /* _NET_XFRM_H */ |