]>
Commit | Line | Data |
---|---|---|
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; |
870a2df4 | 124 | struct xfrm_address_filter *filter; |
12a169e7 HX |
125 | }; |
126 | ||
1da177e4 | 127 | /* Full description of state of transformer. */ |
fd2c3ef7 | 128 | struct xfrm_state { |
0c5c9fb5 | 129 | possible_net_t xs_net; |
abb81c4f | 130 | union { |
12a169e7 | 131 | struct hlist_node gclist; |
abb81c4f HX |
132 | struct hlist_node bydst; |
133 | }; | |
8f126e37 DM |
134 | struct hlist_node bysrc; |
135 | struct hlist_node byspi; | |
1da177e4 LT |
136 | |
137 | atomic_t refcnt; | |
138 | spinlock_t lock; | |
139 | ||
140 | struct xfrm_id id; | |
141 | struct xfrm_selector sel; | |
bf825f81 | 142 | struct xfrm_mark mark; |
35d2856b | 143 | u32 tfcpad; |
1da177e4 | 144 | |
9d4a706d DM |
145 | u32 genid; |
146 | ||
12a169e7 HX |
147 | /* Key manager bits */ |
148 | struct xfrm_state_walk km; | |
1da177e4 LT |
149 | |
150 | /* Parameters of this state. */ | |
151 | struct { | |
152 | u32 reqid; | |
153 | u8 mode; | |
154 | u8 replay_window; | |
155 | u8 aalgo, ealgo, calgo; | |
156 | u8 flags; | |
157 | u16 family; | |
158 | xfrm_address_t saddr; | |
159 | int header_len; | |
160 | int trailer_len; | |
a947b0a9 | 161 | u32 extra_flags; |
1da177e4 LT |
162 | } props; |
163 | ||
164 | struct xfrm_lifetime_cfg lft; | |
165 | ||
166 | /* Data for transformer */ | |
4447bb33 | 167 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
168 | struct xfrm_algo *ealg; |
169 | struct xfrm_algo *calg; | |
1a6509d9 | 170 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
171 | |
172 | /* Data for encapsulator */ | |
173 | struct xfrm_encap_tmpl *encap; | |
174 | ||
060f02a3 NT |
175 | /* Data for care-of address */ |
176 | xfrm_address_t *coaddr; | |
177 | ||
1da177e4 LT |
178 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
179 | struct xfrm_state *tunnel; | |
180 | ||
181 | /* If a tunnel, number of users + 1 */ | |
182 | atomic_t tunnel_users; | |
183 | ||
184 | /* State for replay detection */ | |
185 | struct xfrm_replay_state replay; | |
9736acf3 | 186 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 187 | |
f8cd5488 JHS |
188 | /* Replay detection state at the time we sent the last notification */ |
189 | struct xfrm_replay_state preplay; | |
9736acf3 | 190 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 191 | |
9fdc4883 SK |
192 | /* The functions for replay detection. */ |
193 | struct xfrm_replay *repl; | |
194 | ||
2717096a JHS |
195 | /* internal flag that only holds state for delayed aevent at the |
196 | * moment | |
197 | */ | |
198 | u32 xflags; | |
199 | ||
f8cd5488 JHS |
200 | /* Replay detection notification settings */ |
201 | u32 replay_maxage; | |
202 | u32 replay_maxdiff; | |
203 | ||
204 | /* Replay detection notification timer */ | |
205 | struct timer_list rtimer; | |
206 | ||
1da177e4 LT |
207 | /* Statistics */ |
208 | struct xfrm_stats stats; | |
209 | ||
210 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 211 | struct tasklet_hrtimer mtimer; |
1da177e4 | 212 | |
e3c0d047 FD |
213 | /* used to fix curlft->add_time when changing date */ |
214 | long saved_tmo; | |
215 | ||
9afaca05 | 216 | /* Last used time */ |
d26f3984 | 217 | unsigned long lastused; |
9afaca05 | 218 | |
1da177e4 LT |
219 | /* Reference to data common to all the instances of this |
220 | * transformer. */ | |
533cb5b0 | 221 | const struct xfrm_type *type; |
13996378 | 222 | struct xfrm_mode *inner_mode; |
df9dcb45 | 223 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 224 | struct xfrm_mode *outer_mode; |
1da177e4 | 225 | |
df71837d TJ |
226 | /* Security context */ |
227 | struct xfrm_sec_ctx *security; | |
228 | ||
1da177e4 LT |
229 | /* Private data of this transformer, format is opaque, |
230 | * interpreted by xfrm_type methods. */ | |
231 | void *data; | |
232 | }; | |
233 | ||
673c09be AD |
234 | static inline struct net *xs_net(struct xfrm_state *x) |
235 | { | |
236 | return read_pnet(&x->xs_net); | |
237 | } | |
238 | ||
2717096a JHS |
239 | /* xflags - make enum if more show up */ |
240 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 241 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 242 | |
1da177e4 LT |
243 | enum { |
244 | XFRM_STATE_VOID, | |
245 | XFRM_STATE_ACQ, | |
246 | XFRM_STATE_VALID, | |
247 | XFRM_STATE_ERROR, | |
248 | XFRM_STATE_EXPIRED, | |
249 | XFRM_STATE_DEAD | |
250 | }; | |
251 | ||
26b15dad | 252 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 253 | struct km_event { |
bf08867f HX |
254 | union { |
255 | u32 hard; | |
256 | u32 proto; | |
257 | u32 byid; | |
f8cd5488 | 258 | u32 aevent; |
f7b6983f | 259 | u32 type; |
bf08867f HX |
260 | } data; |
261 | ||
26b15dad | 262 | u32 seq; |
15e47304 | 263 | u32 portid; |
26b15dad | 264 | u32 event; |
7067802e | 265 | struct net *net; |
26b15dad JHS |
266 | }; |
267 | ||
9fdc4883 SK |
268 | struct xfrm_replay { |
269 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
270 | int (*check)(struct xfrm_state *x, | |
271 | struct sk_buff *skb, | |
272 | __be32 net_seq); | |
3b59df46 SK |
273 | int (*recheck)(struct xfrm_state *x, |
274 | struct sk_buff *skb, | |
275 | __be32 net_seq); | |
9fdc4883 SK |
276 | void (*notify)(struct xfrm_state *x, int event); |
277 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
278 | }; | |
279 | ||
25ee3286 | 280 | struct net_device; |
1da177e4 LT |
281 | struct xfrm_type; |
282 | struct xfrm_dst; | |
283 | struct xfrm_policy_afinfo { | |
284 | unsigned short family; | |
1da177e4 | 285 | struct dst_ops *dst_ops; |
ddcfd796 | 286 | void (*garbage_collect)(struct net *net); |
c5b3cf46 | 287 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
5e6b930f DM |
288 | const xfrm_address_t *saddr, |
289 | const xfrm_address_t *daddr); | |
fbda33b2 | 290 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, 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); |
9d7b0fc1 PM |
295 | void (*init_dst)(struct net *net, |
296 | struct xfrm_dst *dst); | |
a1b05140 MN |
297 | int (*init_path)(struct xfrm_dst *path, |
298 | struct dst_entry *dst, | |
299 | int nfheader_len); | |
25ee3286 | 300 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 301 | struct net_device *dev, |
0c7b3eef | 302 | const struct flowi *fl); |
2774c131 | 303 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
304 | }; |
305 | ||
d511337a JP |
306 | int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); |
307 | int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
308 | void km_policy_notify(struct xfrm_policy *xp, int dir, | |
309 | const struct km_event *c); | |
310 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
311 | |
312 | struct xfrm_tmpl; | |
d511337a JP |
313 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
314 | struct xfrm_policy *pol); | |
315 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
316 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 317 | |
1da177e4 | 318 | struct xfrm_state_afinfo { |
17c2a42a | 319 | unsigned int family; |
36cf9acf | 320 | unsigned int proto; |
8e3d716c | 321 | __be16 eth_proto; |
17c2a42a | 322 | struct module *owner; |
533cb5b0 | 323 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 324 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 325 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
326 | void (*init_tempsel)(struct xfrm_selector *sel, |
327 | const struct flowi *fl); | |
19bd6244 DM |
328 | void (*init_temprop)(struct xfrm_state *x, |
329 | const struct xfrm_tmpl *tmpl, | |
330 | const xfrm_address_t *daddr, | |
331 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
332 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
333 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
aad88724 | 334 | int (*output)(struct sock *sk, struct sk_buff *skb); |
7026b1dd | 335 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); |
227620e2 HX |
336 | int (*extract_input)(struct xfrm_state *x, |
337 | struct sk_buff *skb); | |
36cf9acf HX |
338 | int (*extract_output)(struct xfrm_state *x, |
339 | struct sk_buff *skb); | |
716062fd HX |
340 | int (*transport_finish)(struct sk_buff *skb, |
341 | int async); | |
628e341f | 342 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
343 | }; |
344 | ||
d511337a JP |
345 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
346 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
347 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
348 | void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); | |
1da177e4 | 349 | |
2f32b51b SK |
350 | struct xfrm_input_afinfo { |
351 | unsigned int family; | |
352 | struct module *owner; | |
353 | int (*callback)(struct sk_buff *skb, u8 protocol, | |
354 | int err); | |
355 | }; | |
356 | ||
357 | int xfrm_input_register_afinfo(struct xfrm_input_afinfo *afinfo); | |
358 | int xfrm_input_unregister_afinfo(struct xfrm_input_afinfo *afinfo); | |
359 | ||
d511337a | 360 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 361 | |
fd2c3ef7 | 362 | struct xfrm_type { |
1da177e4 LT |
363 | char *description; |
364 | struct module *owner; | |
a6337463 | 365 | u8 proto; |
366 | u8 flags; | |
1b5c2299 | 367 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 368 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
369 | #define XFRM_TYPE_LOCAL_COADDR 4 |
370 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 371 | |
72cb6962 | 372 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 373 | void (*destructor)(struct xfrm_state *); |
e695633e | 374 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 375 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
376 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
377 | const struct flowi *); | |
aee5adb4 | 378 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 379 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 380 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
381 | }; |
382 | ||
d511337a JP |
383 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
384 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 385 | |
b59f45d0 | 386 | struct xfrm_mode { |
227620e2 HX |
387 | /* |
388 | * Remove encapsulation header. | |
389 | * | |
390 | * The IP header will be moved over the top of the encapsulation | |
391 | * header. | |
392 | * | |
393 | * On entry, the transport header shall point to where the IP header | |
394 | * should be and the network header shall be set to where the IP | |
395 | * header currently is. skb->data shall point to the start of the | |
396 | * payload. | |
397 | */ | |
398 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
399 | ||
400 | /* | |
401 | * This is the actual input entry point. | |
402 | * | |
403 | * For transport mode and equivalent this would be identical to | |
404 | * input2 (which does not need to be set). While tunnel mode | |
405 | * and equivalent would set this to the tunnel encapsulation function | |
406 | * xfrm4_prepare_input that would in turn call input2. | |
407 | */ | |
b59f45d0 | 408 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
409 | |
410 | /* | |
411 | * Add encapsulation header. | |
412 | * | |
413 | * On exit, the transport header will be set to the start of the | |
414 | * encapsulation header to be filled in by x->type->output and | |
415 | * the mac header will be set to the nextheader (protocol for | |
416 | * IPv4) field of the extension header directly preceding the | |
417 | * encapsulation header, or in its absence, that of the top IP | |
418 | * header. The value of the network header will always point | |
419 | * to the top IP header while skb->data will point to the payload. | |
420 | */ | |
36cf9acf HX |
421 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
422 | ||
423 | /* | |
424 | * This is the actual output entry point. | |
425 | * | |
426 | * For transport mode and equivalent this would be identical to | |
427 | * output2 (which does not need to be set). While tunnel mode | |
428 | * and equivalent would set this to a tunnel encapsulation function | |
429 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
430 | * call output2. | |
431 | */ | |
432 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 433 | |
17c2a42a | 434 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
435 | struct module *owner; |
436 | unsigned int encap; | |
1bfcb10f HX |
437 | int flags; |
438 | }; | |
439 | ||
440 | /* Flags for xfrm_mode. */ | |
441 | enum { | |
442 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
443 | }; |
444 | ||
d511337a JP |
445 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
446 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 447 | |
df9dcb45 KM |
448 | static inline int xfrm_af2proto(unsigned int family) |
449 | { | |
450 | switch(family) { | |
451 | case AF_INET: | |
452 | return IPPROTO_IPIP; | |
453 | case AF_INET6: | |
454 | return IPPROTO_IPV6; | |
455 | default: | |
456 | return 0; | |
457 | } | |
458 | } | |
459 | ||
460 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
461 | { | |
462 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
463 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
464 | return x->inner_mode; | |
465 | else | |
466 | return x->inner_mode_iaf; | |
467 | } | |
468 | ||
fd2c3ef7 | 469 | struct xfrm_tmpl { |
1da177e4 LT |
470 | /* id in template is interpreted as: |
471 | * daddr - destination of tunnel, may be zero for transport mode. | |
472 | * spi - zero to acquire spi. Not zero if spi is static, then | |
473 | * daddr must be fixed too. | |
474 | * proto - AH/ESP/IPCOMP | |
475 | */ | |
476 | struct xfrm_id id; | |
477 | ||
478 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
479 | xfrm_address_t saddr; | |
480 | ||
76b3f055 MK |
481 | unsigned short encap_family; |
482 | ||
a6337463 | 483 | u32 reqid; |
1da177e4 | 484 | |
7e49e6de | 485 | /* Mode: transport, tunnel etc. */ |
a6337463 | 486 | u8 mode; |
1da177e4 LT |
487 | |
488 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 489 | u8 share; |
1da177e4 LT |
490 | |
491 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 492 | u8 optional; |
1da177e4 | 493 | |
c5d18e98 | 494 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 495 | u8 allalgs; |
c5d18e98 | 496 | |
1da177e4 | 497 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 498 | u32 aalgos; |
499 | u32 ealgos; | |
500 | u32 calgos; | |
1da177e4 LT |
501 | }; |
502 | ||
622dc828 | 503 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 504 | |
12a169e7 HX |
505 | struct xfrm_policy_walk_entry { |
506 | struct list_head all; | |
507 | u8 dead; | |
508 | }; | |
509 | ||
510 | struct xfrm_policy_walk { | |
511 | struct xfrm_policy_walk_entry walk; | |
512 | u8 type; | |
513 | u32 seq; | |
514 | }; | |
515 | ||
a0073fe1 SK |
516 | struct xfrm_policy_queue { |
517 | struct sk_buff_head hold_queue; | |
518 | struct timer_list hold_timer; | |
519 | unsigned long timeout; | |
520 | }; | |
521 | ||
fd2c3ef7 | 522 | struct xfrm_policy { |
0c5c9fb5 | 523 | possible_net_t xp_net; |
2518c7c2 DM |
524 | struct hlist_node bydst; |
525 | struct hlist_node byidx; | |
1da177e4 LT |
526 | |
527 | /* This lock only affects elements except for entry. */ | |
528 | rwlock_t lock; | |
529 | atomic_t refcnt; | |
530 | struct timer_list timer; | |
531 | ||
fe1a5f03 | 532 | struct flow_cache_object flo; |
80c802f3 | 533 | atomic_t genid; |
1da177e4 LT |
534 | u32 priority; |
535 | u32 index; | |
bf825f81 | 536 | struct xfrm_mark mark; |
1da177e4 LT |
537 | struct xfrm_selector selector; |
538 | struct xfrm_lifetime_cfg lft; | |
539 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 540 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 541 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
542 | u8 type; |
543 | u8 action; | |
544 | u8 flags; | |
46ca5f5d | 545 | u8 xfrm_nr; |
12a169e7 | 546 | u16 family; |
df71837d | 547 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
548 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
549 | }; | |
550 | ||
63eb23f5 | 551 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
552 | { |
553 | return read_pnet(&xp->xp_net); | |
554 | } | |
555 | ||
13c1d189 AE |
556 | struct xfrm_kmaddress { |
557 | xfrm_address_t local; | |
558 | xfrm_address_t remote; | |
559 | u32 reserved; | |
560 | u16 family; | |
561 | }; | |
562 | ||
80c9abaa SS |
563 | struct xfrm_migrate { |
564 | xfrm_address_t old_daddr; | |
565 | xfrm_address_t old_saddr; | |
566 | xfrm_address_t new_daddr; | |
567 | xfrm_address_t new_saddr; | |
568 | u8 proto; | |
569 | u8 mode; | |
570 | u16 reserved; | |
571 | u32 reqid; | |
572 | u16 old_family; | |
573 | u16 new_family; | |
574 | }; | |
575 | ||
f8cd5488 | 576 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
577 | /* what happened */ |
578 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
579 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
580 | ||
581 | /* default aevent timeout in units of 100ms */ | |
582 | #define XFRM_AE_ETIME 10 | |
583 | /* Async Event timer multiplier */ | |
584 | #define XFRM_AE_ETH_M 10 | |
585 | /* default seq threshold size */ | |
586 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 587 | |
fd2c3ef7 | 588 | struct xfrm_mgr { |
1da177e4 LT |
589 | struct list_head list; |
590 | char *id; | |
214e005b | 591 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 592 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 593 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 594 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 595 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 596 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
597 | int (*migrate)(const struct xfrm_selector *sel, |
598 | u8 dir, u8 type, | |
599 | const struct xfrm_migrate *m, | |
600 | int num_bundles, | |
601 | const struct xfrm_kmaddress *k); | |
0f24558e | 602 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
603 | }; |
604 | ||
d511337a JP |
605 | int xfrm_register_km(struct xfrm_mgr *km); |
606 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 607 | |
70be6c91 SK |
608 | struct xfrm_tunnel_skb_cb { |
609 | union { | |
610 | struct inet_skb_parm h4; | |
611 | struct inet6_skb_parm h6; | |
612 | } header; | |
613 | ||
614 | union { | |
615 | struct ip_tunnel *ip4; | |
616 | struct ip6_tnl *ip6; | |
617 | } tunnel; | |
618 | }; | |
619 | ||
620 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
621 | ||
436a0a40 HX |
622 | /* |
623 | * This structure is used for the duration where packets are being | |
624 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
625 | * area beyond the generic IP part may be overwritten. | |
626 | */ | |
627 | struct xfrm_skb_cb { | |
70be6c91 | 628 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
629 | |
630 | /* Sequence number for replay protection. */ | |
b318e0e4 | 631 | union { |
1ce3644a SK |
632 | struct { |
633 | __u32 low; | |
634 | __u32 hi; | |
635 | } output; | |
636 | struct { | |
637 | __be32 low; | |
638 | __be32 hi; | |
639 | } input; | |
b318e0e4 | 640 | } seq; |
436a0a40 HX |
641 | }; |
642 | ||
643 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
644 | ||
36cf9acf HX |
645 | /* |
646 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
647 | * to transmit header information to the mode input/output functions. | |
648 | */ | |
649 | struct xfrm_mode_skb_cb { | |
70be6c91 | 650 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
651 | |
652 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
653 | __be16 id; | |
654 | __be16 frag_off; | |
655 | ||
732c8bd5 HX |
656 | /* IP header length (excluding options or extension headers). */ |
657 | u8 ihl; | |
658 | ||
36cf9acf HX |
659 | /* TOS for IPv4, class for IPv6. */ |
660 | u8 tos; | |
661 | ||
662 | /* TTL for IPv4, hop limitfor IPv6. */ | |
663 | u8 ttl; | |
664 | ||
665 | /* Protocol for IPv4, NH for IPv6. */ | |
666 | u8 protocol; | |
667 | ||
732c8bd5 HX |
668 | /* Option length for IPv4, zero for IPv6. */ |
669 | u8 optlen; | |
670 | ||
36cf9acf HX |
671 | /* Used by IPv6 only, zero for IPv4. */ |
672 | u8 flow_lbl[3]; | |
673 | }; | |
674 | ||
675 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
676 | ||
716062fd HX |
677 | /* |
678 | * This structure is used by the input processing to locate the SPI and | |
679 | * related information. | |
680 | */ | |
681 | struct xfrm_spi_skb_cb { | |
70be6c91 | 682 | struct xfrm_tunnel_skb_cb header; |
716062fd | 683 | |
716062fd | 684 | unsigned int daddroff; |
2fcb45b6 | 685 | unsigned int family; |
716062fd HX |
686 | }; |
687 | ||
688 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
689 | ||
c9204d9c | 690 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 691 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
692 | { |
693 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 694 | |
afeb14b4 PM |
695 | if (audit_enabled == 0) |
696 | return NULL; | |
ab5f5e8b | 697 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 698 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
699 | if (audit_buf == NULL) |
700 | return NULL; | |
afeb14b4 PM |
701 | audit_log_format(audit_buf, "op=%s", op); |
702 | return audit_buf; | |
703 | } | |
ab5f5e8b | 704 | |
2e71029e | 705 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
706 | struct audit_buffer *audit_buf) |
707 | { | |
2e71029e TH |
708 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
709 | audit_get_loginuid(current) : | |
710 | INVALID_UID); | |
711 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
712 | (unsigned int) -1; | |
713 | ||
714 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 715 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
716 | } |
717 | ||
2e71029e TH |
718 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
719 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
720 | bool task_valid); | |
721 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
722 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
723 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
724 | struct sk_buff *skb); | |
725 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
726 | __be32 net_seq); | |
727 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
728 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
729 | __be32 net_seq); | |
730 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
731 | u8 proto); | |
c9204d9c | 732 | #else |
41fef0ee MS |
733 | |
734 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 735 | bool task_valid) |
41fef0ee MS |
736 | { |
737 | } | |
738 | ||
739 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 740 | bool task_valid) |
41fef0ee MS |
741 | { |
742 | } | |
743 | ||
744 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 745 | bool task_valid) |
41fef0ee MS |
746 | { |
747 | } | |
748 | ||
749 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 750 | bool task_valid) |
41fef0ee MS |
751 | { |
752 | } | |
753 | ||
754 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
755 | struct sk_buff *skb) | |
756 | { | |
757 | } | |
758 | ||
9fdc4883 SK |
759 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
760 | struct sk_buff *skb, __be32 net_seq) | |
761 | { | |
762 | } | |
763 | ||
41fef0ee MS |
764 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
765 | u16 family) | |
766 | { | |
767 | } | |
768 | ||
769 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
770 | __be32 net_spi, __be32 net_seq) | |
771 | { | |
772 | } | |
773 | ||
774 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
775 | struct sk_buff *skb, u8 proto) | |
776 | { | |
777 | } | |
c9204d9c | 778 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 779 | |
1da177e4 LT |
780 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
781 | { | |
782 | if (likely(policy != NULL)) | |
783 | atomic_inc(&policy->refcnt); | |
784 | } | |
785 | ||
d511337a | 786 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
787 | |
788 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
789 | { | |
790 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 791 | xfrm_policy_destroy(policy); |
1da177e4 LT |
792 | } |
793 | ||
4e81bb83 MN |
794 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
795 | { | |
796 | int i; | |
797 | for (i = npols - 1; i >= 0; --i) | |
798 | xfrm_pol_put(pols[i]); | |
799 | } | |
4e81bb83 | 800 | |
d511337a | 801 | void __xfrm_state_destroy(struct xfrm_state *); |
1da177e4 | 802 | |
21380b81 HX |
803 | static inline void __xfrm_state_put(struct xfrm_state *x) |
804 | { | |
805 | atomic_dec(&x->refcnt); | |
806 | } | |
807 | ||
1da177e4 LT |
808 | static inline void xfrm_state_put(struct xfrm_state *x) |
809 | { | |
810 | if (atomic_dec_and_test(&x->refcnt)) | |
811 | __xfrm_state_destroy(x); | |
812 | } | |
813 | ||
814 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
815 | { | |
816 | atomic_inc(&x->refcnt); | |
817 | } | |
818 | ||
1744a8fe DM |
819 | static inline bool addr_match(const void *token1, const void *token2, |
820 | int prefixlen) | |
1da177e4 | 821 | { |
1744a8fe DM |
822 | const __be32 *a1 = token1; |
823 | const __be32 *a2 = token2; | |
1da177e4 LT |
824 | int pdw; |
825 | int pbi; | |
826 | ||
a6337463 | 827 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
828 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
829 | ||
830 | if (pdw) | |
831 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 832 | return false; |
1da177e4 LT |
833 | |
834 | if (pbi) { | |
5f19343f | 835 | __be32 mask; |
1da177e4 LT |
836 | |
837 | mask = htonl((0xffffffff) << (32 - pbi)); | |
838 | ||
839 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 840 | return false; |
1da177e4 LT |
841 | } |
842 | ||
1744a8fe | 843 | return true; |
1da177e4 LT |
844 | } |
845 | ||
26bff940 AD |
846 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
847 | { | |
848 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
849 | if (prefixlen == 0) | |
850 | return true; | |
851 | return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen))); | |
852 | } | |
853 | ||
1da177e4 | 854 | static __inline__ |
6281dcc9 | 855 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 856 | { |
f9d07e41 | 857 | __be16 port; |
1d28f42c | 858 | switch(fl->flowi_proto) { |
1da177e4 LT |
859 | case IPPROTO_TCP: |
860 | case IPPROTO_UDP: | |
ba4e58ec | 861 | case IPPROTO_UDPLITE: |
1da177e4 | 862 | case IPPROTO_SCTP: |
6281dcc9 | 863 | port = uli->ports.sport; |
1da177e4 LT |
864 | break; |
865 | case IPPROTO_ICMP: | |
866 | case IPPROTO_ICMPV6: | |
6281dcc9 | 867 | port = htons(uli->icmpt.type); |
1da177e4 | 868 | break; |
2ce4272a | 869 | case IPPROTO_MH: |
6281dcc9 | 870 | port = htons(uli->mht.type); |
2ce4272a | 871 | break; |
cc9ff19d | 872 | case IPPROTO_GRE: |
6281dcc9 | 873 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 874 | break; |
1da177e4 LT |
875 | default: |
876 | port = 0; /*XXX*/ | |
877 | } | |
878 | return port; | |
879 | } | |
880 | ||
881 | static __inline__ | |
6281dcc9 | 882 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 883 | { |
f9d07e41 | 884 | __be16 port; |
1d28f42c | 885 | switch(fl->flowi_proto) { |
1da177e4 LT |
886 | case IPPROTO_TCP: |
887 | case IPPROTO_UDP: | |
ba4e58ec | 888 | case IPPROTO_UDPLITE: |
1da177e4 | 889 | case IPPROTO_SCTP: |
6281dcc9 | 890 | port = uli->ports.dport; |
1da177e4 LT |
891 | break; |
892 | case IPPROTO_ICMP: | |
893 | case IPPROTO_ICMPV6: | |
6281dcc9 | 894 | port = htons(uli->icmpt.code); |
1da177e4 | 895 | break; |
cc9ff19d | 896 | case IPPROTO_GRE: |
6281dcc9 | 897 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 898 | break; |
1da177e4 LT |
899 | default: |
900 | port = 0; /*XXX*/ | |
901 | } | |
902 | return port; | |
903 | } | |
904 | ||
d511337a JP |
905 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
906 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 907 | |
df71837d TJ |
908 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
909 | /* If neither has a context --> match | |
910 | * Otherwise, both must have a context and the sids, doi, alg must match | |
911 | */ | |
bc9b35ad | 912 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
913 | { |
914 | return ((!s1 && !s2) || | |
915 | (s1 && s2 && | |
916 | (s1->ctx_sid == s2->ctx_sid) && | |
917 | (s1->ctx_doi == s2->ctx_doi) && | |
918 | (s1->ctx_alg == s2->ctx_alg))); | |
919 | } | |
920 | #else | |
bc9b35ad | 921 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 922 | { |
bc9b35ad | 923 | return true; |
df71837d TJ |
924 | } |
925 | #endif | |
926 | ||
1da177e4 LT |
927 | /* A struct encoding bundle of transformations to apply to some set of flow. |
928 | * | |
929 | * dst->child points to the next element of bundle. | |
930 | * dst->xfrm points to an instanse of transformer. | |
931 | * | |
932 | * Due to unfortunate limitations of current routing cache, which we | |
933 | * have no time to fix, it mirrors struct rtable and bound to the same | |
934 | * routing key, including saddr,daddr. However, we can have many of | |
935 | * bundles differing by session id. All the bundles grow from a parent | |
936 | * policy rule. | |
937 | */ | |
fd2c3ef7 | 938 | struct xfrm_dst { |
1da177e4 | 939 | union { |
1da177e4 LT |
940 | struct dst_entry dst; |
941 | struct rtable rt; | |
942 | struct rt6_info rt6; | |
943 | } u; | |
944 | struct dst_entry *route; | |
80c802f3 TT |
945 | struct flow_cache_object flo; |
946 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
947 | int num_pols, num_xfrms; | |
157bfc25 MN |
948 | #ifdef CONFIG_XFRM_SUB_POLICY |
949 | struct flowi *origin; | |
950 | struct xfrm_selector *partner; | |
951 | #endif | |
80c802f3 TT |
952 | u32 xfrm_genid; |
953 | u32 policy_genid; | |
1da177e4 LT |
954 | u32 route_mtu_cached; |
955 | u32 child_mtu_cached; | |
92d63dec HY |
956 | u32 route_cookie; |
957 | u32 path_cookie; | |
1da177e4 LT |
958 | }; |
959 | ||
def8b4fa | 960 | #ifdef CONFIG_XFRM |
aabc9761 HX |
961 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
962 | { | |
80c802f3 | 963 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
964 | dst_release(xdst->route); |
965 | if (likely(xdst->u.dst.xfrm)) | |
966 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
967 | #ifdef CONFIG_XFRM_SUB_POLICY |
968 | kfree(xdst->origin); | |
969 | xdst->origin = NULL; | |
970 | kfree(xdst->partner); | |
971 | xdst->partner = NULL; | |
972 | #endif | |
aabc9761 | 973 | } |
def8b4fa | 974 | #endif |
aabc9761 | 975 | |
d511337a | 976 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 977 | |
fd2c3ef7 | 978 | struct sec_path { |
1da177e4 LT |
979 | atomic_t refcnt; |
980 | int len; | |
dbe5b4aa | 981 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
982 | }; |
983 | ||
990078af MS |
984 | static inline int secpath_exists(struct sk_buff *skb) |
985 | { | |
986 | #ifdef CONFIG_XFRM | |
987 | return skb->sp != NULL; | |
988 | #else | |
989 | return 0; | |
990 | #endif | |
991 | } | |
992 | ||
1da177e4 LT |
993 | static inline struct sec_path * |
994 | secpath_get(struct sec_path *sp) | |
995 | { | |
996 | if (sp) | |
997 | atomic_inc(&sp->refcnt); | |
998 | return sp; | |
999 | } | |
1000 | ||
d511337a | 1001 | void __secpath_destroy(struct sec_path *sp); |
1da177e4 LT |
1002 | |
1003 | static inline void | |
1004 | secpath_put(struct sec_path *sp) | |
1005 | { | |
1006 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
1007 | __secpath_destroy(sp); | |
1008 | } | |
1009 | ||
d511337a | 1010 | struct sec_path *secpath_dup(struct sec_path *src); |
1da177e4 LT |
1011 | |
1012 | static inline void | |
1013 | secpath_reset(struct sk_buff *skb) | |
1014 | { | |
1015 | #ifdef CONFIG_XFRM | |
1016 | secpath_put(skb->sp); | |
1017 | skb->sp = NULL; | |
1018 | #endif | |
1019 | } | |
1020 | ||
a1e59abf | 1021 | static inline int |
6cc32961 | 1022 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1023 | { |
1024 | switch (family) { | |
1025 | case AF_INET: | |
1026 | return addr->a4 == 0; | |
1027 | case AF_INET6: | |
15e318bd | 1028 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1029 | } |
1030 | return 0; | |
1031 | } | |
1032 | ||
1da177e4 | 1033 | static inline int |
21eddb5c | 1034 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1035 | { |
1036 | return (tmpl->saddr.a4 && | |
1037 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1038 | } | |
1039 | ||
1040 | static inline int | |
21eddb5c | 1041 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1042 | { |
1043 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1044 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1045 | } |
1046 | ||
1047 | static inline int | |
21eddb5c | 1048 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1049 | { |
1050 | switch (family) { | |
1051 | case AF_INET: | |
1052 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1053 | case AF_INET6: | |
1054 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1055 | } | |
1056 | return !0; | |
1057 | } | |
1058 | ||
1059 | #ifdef CONFIG_XFRM | |
d511337a JP |
1060 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1061 | unsigned short family); | |
1da177e4 | 1062 | |
d5422efe HX |
1063 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1064 | struct sk_buff *skb, | |
1065 | unsigned int family, int reverse) | |
1da177e4 | 1066 | { |
f6e1e25d | 1067 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1068 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1069 | ||
1da177e4 | 1070 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1071 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1072 | |
f6e1e25d | 1073 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1074 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1075 | __xfrm_policy_check(sk, ndir, skb, family); |
1076 | } | |
1077 | ||
1078 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1079 | { | |
1080 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1081 | } |
1082 | ||
1083 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1084 | { | |
1085 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1086 | } | |
1087 | ||
1088 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1089 | { | |
1090 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1091 | } | |
1092 | ||
d5422efe HX |
1093 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1094 | struct sk_buff *skb) | |
1095 | { | |
1096 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1097 | } | |
1098 | ||
1099 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1100 | struct sk_buff *skb) | |
1101 | { | |
1102 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1103 | } | |
1104 | ||
d511337a JP |
1105 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1106 | unsigned int family, int reverse); | |
d5422efe HX |
1107 | |
1108 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1109 | unsigned int family) | |
1110 | { | |
1111 | return __xfrm_decode_session(skb, fl, family, 0); | |
1112 | } | |
1113 | ||
1114 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1115 | struct flowi *fl, | |
1116 | unsigned int family) | |
1117 | { | |
1118 | return __xfrm_decode_session(skb, fl, family, 1); | |
1119 | } | |
1120 | ||
d511337a | 1121 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1122 | |
1123 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1124 | { | |
99a66657 AD |
1125 | struct net *net = dev_net(skb->dev); |
1126 | ||
1127 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1128 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1129 | __xfrm_route_forward(skb, family); |
1130 | } | |
1131 | ||
1132 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1133 | { | |
1134 | return xfrm_route_forward(skb, AF_INET); | |
1135 | } | |
1136 | ||
1137 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1138 | { | |
1139 | return xfrm_route_forward(skb, AF_INET6); | |
1140 | } | |
1141 | ||
d511337a | 1142 | int __xfrm_sk_clone_policy(struct sock *sk); |
1da177e4 LT |
1143 | |
1144 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1145 | { | |
1146 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1147 | return __xfrm_sk_clone_policy(sk); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
d511337a | 1151 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1152 | |
1153 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1154 | { | |
1155 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1156 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1157 | sk->sk_policy[0] = NULL; | |
1158 | } | |
1159 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1160 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1161 | sk->sk_policy[1] = NULL; | |
1162 | } | |
1163 | } | |
1164 | ||
d511337a | 1165 | void xfrm_garbage_collect(struct net *net); |
e4c17216 | 1166 | |
1da177e4 LT |
1167 | #else |
1168 | ||
1169 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1170 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1171 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1172 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1173 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1174 | { | |
1175 | return 1; | |
1176 | } | |
1177 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1178 | { | |
1179 | return 1; | |
1180 | } | |
1181 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1182 | { | |
1183 | return 1; | |
1184 | } | |
d5422efe HX |
1185 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1186 | struct flowi *fl, | |
1187 | unsigned int family) | |
1188 | { | |
1189 | return -ENOSYS; | |
1190 | } | |
1191 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1192 | struct sk_buff *skb) | |
1193 | { | |
1194 | return 1; | |
1195 | } | |
1196 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1197 | struct sk_buff *skb) | |
1198 | { | |
1199 | return 1; | |
1200 | } | |
e4c17216 PM |
1201 | static inline void xfrm_garbage_collect(struct net *net) |
1202 | { | |
1203 | } | |
1da177e4 LT |
1204 | #endif |
1205 | ||
1206 | static __inline__ | |
e8a4e377 | 1207 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1208 | { |
1209 | switch (family){ | |
1210 | case AF_INET: | |
7e1dc7b6 | 1211 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1212 | case AF_INET6: |
7e1dc7b6 | 1213 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1214 | } |
1215 | return NULL; | |
1216 | } | |
1217 | ||
1218 | static __inline__ | |
e8a4e377 | 1219 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1220 | { |
1221 | switch (family){ | |
1222 | case AF_INET: | |
7e1dc7b6 | 1223 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1224 | case AF_INET6: |
7e1dc7b6 | 1225 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1226 | } |
1227 | return NULL; | |
1228 | } | |
1229 | ||
9bb182a7 | 1230 | static __inline__ |
e8a4e377 | 1231 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1232 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1233 | unsigned short family) | |
1234 | { | |
1235 | switch(family) { | |
1236 | case AF_INET: | |
7e1dc7b6 DM |
1237 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1238 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1239 | break; |
1240 | case AF_INET6: | |
15e318bd JB |
1241 | saddr->in6 = fl->u.ip6.saddr; |
1242 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1243 | break; |
1244 | } | |
1245 | } | |
1246 | ||
1da177e4 | 1247 | static __inline__ int |
f8848067 DM |
1248 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1249 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1250 | { |
1251 | if (daddr->a4 == x->id.daddr.a4 && | |
1252 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1253 | return 1; | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | static __inline__ int | |
f8848067 DM |
1258 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1259 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1260 | { |
ff88b30c YH |
1261 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1262 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1263 | ipv6_addr_any((struct in6_addr *)saddr) || |
1264 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1265 | return 1; | |
1266 | return 0; | |
1267 | } | |
1268 | ||
1269 | static __inline__ int | |
f8848067 DM |
1270 | xfrm_state_addr_check(const struct xfrm_state *x, |
1271 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1272 | unsigned short family) |
1273 | { | |
1274 | switch (family) { | |
1275 | case AF_INET: | |
1276 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1277 | case AF_INET6: | |
1278 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1279 | } | |
1280 | return 0; | |
1281 | } | |
1282 | ||
e53820de | 1283 | static __inline__ int |
f8848067 | 1284 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1285 | unsigned short family) |
1286 | { | |
1287 | switch (family) { | |
1288 | case AF_INET: | |
1289 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1290 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1291 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1292 | case AF_INET6: |
1293 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1294 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1295 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1296 | } |
1297 | return 0; | |
1298 | } | |
1299 | ||
f8848067 | 1300 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1301 | { |
1302 | return atomic_read(&x->tunnel_users); | |
1303 | } | |
1304 | ||
5794708f MN |
1305 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1306 | { | |
dc00a525 MN |
1307 | return (!userproto || proto == userproto || |
1308 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1309 | proto == IPPROTO_ESP || | |
1310 | proto == IPPROTO_COMP))); | |
5794708f MN |
1311 | } |
1312 | ||
1da177e4 LT |
1313 | /* |
1314 | * xfrm algorithm information | |
1315 | */ | |
1a6509d9 HX |
1316 | struct xfrm_algo_aead_info { |
1317 | u16 icv_truncbits; | |
1318 | }; | |
1319 | ||
1da177e4 LT |
1320 | struct xfrm_algo_auth_info { |
1321 | u16 icv_truncbits; | |
1322 | u16 icv_fullbits; | |
1323 | }; | |
1324 | ||
1325 | struct xfrm_algo_encr_info { | |
1326 | u16 blockbits; | |
1327 | u16 defkeybits; | |
1328 | }; | |
1329 | ||
1330 | struct xfrm_algo_comp_info { | |
1331 | u16 threshold; | |
1332 | }; | |
1333 | ||
1334 | struct xfrm_algo_desc { | |
1335 | char *name; | |
04ff1260 | 1336 | char *compat; |
1da177e4 | 1337 | u8 available:1; |
7e50f84c | 1338 | u8 pfkey_supported:1; |
1da177e4 | 1339 | union { |
1a6509d9 | 1340 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1341 | struct xfrm_algo_auth_info auth; |
1342 | struct xfrm_algo_encr_info encr; | |
1343 | struct xfrm_algo_comp_info comp; | |
1344 | } uinfo; | |
1345 | struct sadb_alg desc; | |
1346 | }; | |
1347 | ||
3328715e SK |
1348 | /* XFRM protocol handlers. */ |
1349 | struct xfrm4_protocol { | |
1350 | int (*handler)(struct sk_buff *skb); | |
1351 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1352 | int encap_type); | |
1353 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1354 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1355 | ||
1356 | struct xfrm4_protocol __rcu *next; | |
1357 | int priority; | |
1358 | }; | |
1359 | ||
7e14ea15 | 1360 | struct xfrm6_protocol { |
1da177e4 | 1361 | int (*handler)(struct sk_buff *skb); |
7e14ea15 SK |
1362 | int (*cb_handler)(struct sk_buff *skb, int err); |
1363 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1364 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1365 | |
7e14ea15 | 1366 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1367 | int priority; |
1da177e4 LT |
1368 | }; |
1369 | ||
1da177e4 LT |
1370 | /* XFRM tunnel handlers. */ |
1371 | struct xfrm_tunnel { | |
aba82695 | 1372 | int (*handler)(struct sk_buff *skb); |
a6337463 | 1373 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1374 | |
b33eab08 | 1375 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1376 | int priority; |
1377 | }; | |
1378 | ||
1da177e4 | 1379 | struct xfrm6_tunnel { |
d2acc347 HX |
1380 | int (*handler)(struct sk_buff *skb); |
1381 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1382 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1383 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1384 | int priority; |
1da177e4 LT |
1385 | }; |
1386 | ||
d511337a JP |
1387 | void xfrm_init(void); |
1388 | void xfrm4_init(void); | |
1389 | int xfrm_state_init(struct net *net); | |
1390 | void xfrm_state_fini(struct net *net); | |
1391 | void xfrm4_state_init(void); | |
2f32b51b | 1392 | void xfrm4_protocol_init(void); |
c35b7e72 | 1393 | #ifdef CONFIG_XFRM |
d511337a JP |
1394 | int xfrm6_init(void); |
1395 | void xfrm6_fini(void); | |
1396 | int xfrm6_state_init(void); | |
1397 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1398 | int xfrm6_protocol_init(void); |
1399 | void xfrm6_protocol_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 | 1425 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1426 | struct xfrm_address_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); | |
2e71029e | 1494 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); |
d511337a JP |
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); | |
7026b1dd | 1506 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
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); | |
aad88724 | 1526 | int xfrm4_output(struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1527 | int xfrm4_output_finish(struct sock *sk, 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 JP |
1533 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1534 | int xfrm6_extract_header(struct sk_buff *skb); | |
1535 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1536 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); | |
1537 | int xfrm6_transport_finish(struct sk_buff *skb, int async); | |
1538 | int xfrm6_rcv(struct sk_buff *skb); | |
1539 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1540 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1541 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1542 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1543 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); | |
1544 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1545 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1546 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1547 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1548 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1549 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1550 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
aad88724 | 1551 | int xfrm6_output(struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1552 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1553 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1554 | u8 **prevhdr); | |
1da177e4 LT |
1555 | |
1556 | #ifdef CONFIG_XFRM | |
d511337a JP |
1557 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1558 | int xfrm_user_policy(struct sock *sk, int optname, | |
1559 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1560 | #else |
1561 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1562 | { | |
1563 | return -ENOPROTOOPT; | |
1564 | } | |
1565 | ||
067b207b | 1566 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1567 | { |
1568 | /* should not happen */ | |
1569 | kfree_skb(skb); | |
1570 | return 0; | |
1571 | } | |
1da177e4 LT |
1572 | #endif |
1573 | ||
0331b1f3 | 1574 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1575 | |
d511337a JP |
1576 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1577 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1578 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1579 | void *); | |
283bc9f3 | 1580 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1581 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1582 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1583 | u8 type, int dir, | |
4e81bb83 | 1584 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1585 | struct xfrm_sec_ctx *ctx, int delete, |
1586 | int *err); | |
d511337a JP |
1587 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
1588 | u32 id, int delete, int *err); | |
2e71029e | 1589 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1590 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1591 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1592 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1593 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1594 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1595 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1596 | const xfrm_address_t *daddr, |
1597 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1598 | unsigned short family); |
d511337a | 1599 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1600 | |
80c9abaa | 1601 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1602 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1603 | const struct xfrm_migrate *m, int num_bundles, | |
1604 | const struct xfrm_kmaddress *k); | |
283bc9f3 | 1605 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a JP |
1606 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
1607 | struct xfrm_migrate *m); | |
1608 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, | |
1609 | struct xfrm_migrate *m, int num_bundles, | |
8d549c4f | 1610 | struct xfrm_kmaddress *k, struct net *net); |
80c9abaa SS |
1611 | #endif |
1612 | ||
d511337a JP |
1613 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1614 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1615 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1616 | xfrm_address_t *addr); | |
1617 | ||
1618 | void xfrm_input_init(void); | |
1619 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1620 | ||
1621 | void xfrm_probe_algs(void); | |
1622 | int xfrm_count_pfkey_auth_supported(void); | |
1623 | int xfrm_count_pfkey_enc_supported(void); | |
1624 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1625 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1626 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1627 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1628 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1629 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1630 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1631 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1632 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1633 | int probe); | |
1da177e4 | 1634 | |
70e94e66 YH |
1635 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1636 | const xfrm_address_t *b) | |
1637 | { | |
1638 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1639 | (const struct in6_addr *)b); | |
1640 | } | |
1641 | ||
1642 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1643 | const xfrm_address_t *b, | |
1644 | sa_family_t family) | |
1da177e4 LT |
1645 | { |
1646 | switch (family) { | |
1647 | default: | |
1648 | case AF_INET: | |
70e94e66 | 1649 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1650 | case AF_INET6: |
70e94e66 | 1651 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1652 | } |
1653 | } | |
1654 | ||
77d8d7a6 HX |
1655 | static inline int xfrm_policy_id2dir(u32 index) |
1656 | { | |
1657 | return index & 7; | |
1658 | } | |
1659 | ||
a6483b79 AD |
1660 | #ifdef CONFIG_XFRM |
1661 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1662 | { |
be33690d PM |
1663 | struct sock *nlsk; |
1664 | int ret = 0; | |
1665 | ||
1666 | rcu_read_lock(); | |
a6483b79 | 1667 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1668 | if (nlsk) |
1669 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1670 | rcu_read_unlock(); | |
1671 | return ret; | |
f8cd5488 | 1672 | } |
0f24558e HG |
1673 | |
1674 | static inline int xfrm_acquire_is_on(struct net *net) | |
1675 | { | |
1676 | struct sock *nlsk; | |
1677 | int ret = 0; | |
1678 | ||
1679 | rcu_read_lock(); | |
1680 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1681 | if (nlsk) | |
1682 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1683 | rcu_read_unlock(); | |
1684 | ||
1685 | return ret; | |
1686 | } | |
a6483b79 | 1687 | #endif |
f8cd5488 | 1688 | |
ee5c2317 SK |
1689 | static inline int aead_len(struct xfrm_algo_aead *alg) |
1690 | { | |
1691 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1692 | } | |
1693 | ||
85158621 | 1694 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1695 | { |
1696 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1697 | } | |
1698 | ||
85158621 | 1699 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1700 | { |
1701 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1702 | } | |
1703 | ||
9736acf3 SK |
1704 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1705 | { | |
1706 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1707 | } | |
1708 | ||
80c9abaa | 1709 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1710 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1711 | struct xfrm_state *orig) | |
1712 | { | |
1713 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1714 | GFP_KERNEL); | |
1715 | if (!x->replay_esn) | |
1716 | return -ENOMEM; | |
1717 | ||
1718 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1719 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1720 | ||
1721 | x->preplay_esn = kmemdup(x->replay_esn, | |
1722 | xfrm_replay_state_esn_len(x->replay_esn), | |
1723 | GFP_KERNEL); | |
1724 | if (!x->preplay_esn) { | |
1725 | kfree(x->replay_esn); | |
1726 | return -ENOMEM; | |
1727 | } | |
1728 | ||
1729 | return 0; | |
1730 | } | |
1731 | ||
ee5c2317 SK |
1732 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1733 | { | |
1734 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1735 | } | |
1736 | ||
1737 | ||
80c9abaa SS |
1738 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1739 | { | |
0f99be0d | 1740 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1741 | } |
1742 | ||
4447bb33 MW |
1743 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1744 | { | |
1745 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1746 | } | |
1747 | ||
80c9abaa SS |
1748 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1749 | { | |
1750 | int i; | |
1751 | for (i = 0; i < n; i++) | |
1752 | xfrm_state_put(*(states + i)); | |
1753 | } | |
1754 | ||
1755 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1756 | { | |
1757 | int i; | |
1758 | for (i = 0; i < n; i++) | |
1759 | xfrm_state_delete(*(states + i)); | |
1760 | } | |
1761 | #endif | |
f8cd5488 | 1762 | |
def8b4fa | 1763 | #ifdef CONFIG_XFRM |
00501121 HX |
1764 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1765 | { | |
1766 | return skb->sp->xvec[skb->sp->len - 1]; | |
1767 | } | |
def8b4fa | 1768 | #endif |
00501121 | 1769 | |
bf825f81 JHS |
1770 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1771 | { | |
1772 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1773 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1774 | else |
1775 | m->v = m->m = 0; | |
1776 | ||
1777 | return m->v & m->m; | |
1778 | } | |
1779 | ||
e3dfa389 | 1780 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1781 | { |
1d1e34dd | 1782 | int ret = 0; |
bf825f81 | 1783 | |
1d1e34dd DM |
1784 | if (m->m | m->v) |
1785 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1786 | return ret; | |
bf825f81 JHS |
1787 | } |
1788 | ||
70be6c91 SK |
1789 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
1790 | unsigned int family) | |
1791 | { | |
1792 | bool tunnel = false; | |
1793 | ||
1794 | switch(family) { | |
1795 | case AF_INET: | |
1796 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1797 | tunnel = true; | |
1798 | break; | |
1799 | case AF_INET6: | |
1800 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1801 | tunnel = true; | |
1802 | break; | |
1803 | } | |
1804 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
1805 | return -EINVAL; | |
1806 | ||
1807 | return 0; | |
1808 | } | |
1da177e4 | 1809 | #endif /* _NET_XFRM_H */ |