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1da177e4 LT |
1 | #ifndef _NET_XFRM_H |
2 | #define _NET_XFRM_H | |
3 | ||
aabc9761 | 4 | #include <linux/compiler.h> |
1da177e4 LT |
5 | #include <linux/xfrm.h> |
6 | #include <linux/spinlock.h> | |
7 | #include <linux/list.h> | |
8 | #include <linux/skbuff.h> | |
14c85021 | 9 | #include <linux/socket.h> |
1da177e4 | 10 | #include <linux/pfkeyv2.h> |
5794708f | 11 | #include <linux/ipsec.h> |
1da177e4 | 12 | #include <linux/in6.h> |
4a3e2f71 | 13 | #include <linux/mutex.h> |
ab5f5e8b | 14 | #include <linux/audit.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
1da177e4 LT |
16 | |
17 | #include <net/sock.h> | |
18 | #include <net/dst.h> | |
436a0a40 | 19 | #include <net/ip.h> |
1da177e4 LT |
20 | #include <net/route.h> |
21 | #include <net/ipv6.h> | |
22 | #include <net/ip6_fib.h> | |
fe1a5f03 | 23 | #include <net/flow.h> |
9e0d57fd YP |
24 | |
25 | #include <linux/interrupt.h> | |
26 | ||
558f82ef MN |
27 | #ifdef CONFIG_XFRM_STATISTICS |
28 | #include <net/snmp.h> | |
29 | #endif | |
1da177e4 | 30 | |
d3d6dd3a MN |
31 | #define XFRM_PROTO_ESP 50 |
32 | #define XFRM_PROTO_AH 51 | |
33 | #define XFRM_PROTO_COMP 108 | |
34 | #define XFRM_PROTO_IPIP 4 | |
35 | #define XFRM_PROTO_IPV6 41 | |
36 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
37 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
38 | ||
fa9921e4 | 39 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 40 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
41 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
42 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
43 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
44 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 45 | |
558f82ef | 46 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e AD |
47 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
48 | #define XFRM_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.xfrm_statistics, field) | |
49 | #define XFRM_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)-mib.xfrm_statistics, field) | |
558f82ef | 50 | #else |
59c9940e AD |
51 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
52 | #define XFRM_INC_STATS_BH(net, field) ((void)(net)) | |
53 | #define XFRM_INC_STATS_USER(net, field) ((void)(net)) | |
558f82ef MN |
54 | #endif |
55 | ||
4a3e2f71 | 56 | extern struct mutex xfrm_cfg_mutex; |
1da177e4 LT |
57 | |
58 | /* Organization of SPD aka "XFRM rules" | |
59 | ------------------------------------ | |
60 | ||
61 | Basic objects: | |
62 | - policy rule, struct xfrm_policy (=SPD entry) | |
63 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
64 | - instance of a transformer, struct xfrm_state (=SA) | |
65 | - template to clone xfrm_state, struct xfrm_tmpl | |
66 | ||
67 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
68 | (To be compatible with existing pfkeyv2 implementations, | |
69 | many rules with priority of 0x7fffffff are allowed to exist and | |
70 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
71 | ||
72 | Lookup is plain linear search until the first match with selector. | |
73 | ||
74 | If "action" is "block", then we prohibit the flow, otherwise: | |
75 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
76 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
77 | described by templates xfrm_tmpl. Each template is resolved | |
78 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
79 | to a dst_entry returned to requestor. | |
80 | ||
81 | dst -. xfrm .-> xfrm_state #1 | |
82 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
83 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
84 | |---. child .-> NULL | |
85 | ||
86 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
87 | ||
88 | ||
89 | Resolution of xrfm_tmpl | |
90 | ----------------------- | |
91 | Template contains: | |
92 | 1. ->mode Mode: transport or tunnel | |
93 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
94 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
95 | Q: allow to resolve security gateway? | |
96 | 4. ->id.spi If not zero, static SPI. | |
97 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
98 | 6. ->algos List of allowed algos. Plain bitmask now. | |
99 | Q: ealgos, aalgos, calgos. What a mess... | |
100 | 7. ->share Sharing mode. | |
101 | Q: how to implement private sharing mode? To add struct sock* to | |
102 | flow id? | |
103 | ||
104 | Having this template we search through SAD searching for entries | |
105 | with appropriate mode/proto/algo, permitted by selector. | |
106 | If no appropriate entry found, it is requested from key manager. | |
107 | ||
108 | PROBLEMS: | |
109 | Q: How to find all the bundles referring to a physical path for | |
110 | PMTU discovery? Seems, dst should contain list of all parents... | |
111 | and enter to infinite locking hierarchy disaster. | |
112 | No! It is easier, we will not search for them, let them find us. | |
113 | We add genid to each dst plus pointer to genid of raw IP route, | |
114 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
115 | dst_check() will see this for top level and trigger resyncing | |
116 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
117 | */ | |
118 | ||
12a169e7 HX |
119 | struct xfrm_state_walk { |
120 | struct list_head all; | |
121 | u8 state; | |
122 | union { | |
123 | u8 dying; | |
124 | u8 proto; | |
125 | }; | |
126 | u32 seq; | |
127 | }; | |
128 | ||
1da177e4 | 129 | /* Full description of state of transformer. */ |
fd2c3ef7 | 130 | struct xfrm_state { |
673c09be AD |
131 | #ifdef CONFIG_NET_NS |
132 | struct net *xs_net; | |
133 | #endif | |
abb81c4f | 134 | union { |
12a169e7 | 135 | struct hlist_node gclist; |
abb81c4f HX |
136 | struct hlist_node bydst; |
137 | }; | |
8f126e37 DM |
138 | struct hlist_node bysrc; |
139 | struct hlist_node byspi; | |
1da177e4 LT |
140 | |
141 | atomic_t refcnt; | |
142 | spinlock_t lock; | |
143 | ||
144 | struct xfrm_id id; | |
145 | struct xfrm_selector sel; | |
bf825f81 | 146 | struct xfrm_mark mark; |
35d2856b | 147 | u32 tfcpad; |
1da177e4 | 148 | |
9d4a706d DM |
149 | u32 genid; |
150 | ||
12a169e7 HX |
151 | /* Key manager bits */ |
152 | struct xfrm_state_walk km; | |
1da177e4 LT |
153 | |
154 | /* Parameters of this state. */ | |
155 | struct { | |
156 | u32 reqid; | |
157 | u8 mode; | |
158 | u8 replay_window; | |
159 | u8 aalgo, ealgo, calgo; | |
160 | u8 flags; | |
161 | u16 family; | |
162 | xfrm_address_t saddr; | |
163 | int header_len; | |
164 | int trailer_len; | |
165 | } props; | |
166 | ||
167 | struct xfrm_lifetime_cfg lft; | |
168 | ||
169 | /* Data for transformer */ | |
4447bb33 | 170 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
171 | struct xfrm_algo *ealg; |
172 | struct xfrm_algo *calg; | |
1a6509d9 | 173 | struct xfrm_algo_aead *aead; |
1da177e4 LT |
174 | |
175 | /* Data for encapsulator */ | |
176 | struct xfrm_encap_tmpl *encap; | |
177 | ||
060f02a3 NT |
178 | /* Data for care-of address */ |
179 | xfrm_address_t *coaddr; | |
180 | ||
1da177e4 LT |
181 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
182 | struct xfrm_state *tunnel; | |
183 | ||
184 | /* If a tunnel, number of users + 1 */ | |
185 | atomic_t tunnel_users; | |
186 | ||
187 | /* State for replay detection */ | |
188 | struct xfrm_replay_state replay; | |
189 | ||
f8cd5488 JHS |
190 | /* Replay detection state at the time we sent the last notification */ |
191 | struct xfrm_replay_state preplay; | |
192 | ||
2717096a JHS |
193 | /* internal flag that only holds state for delayed aevent at the |
194 | * moment | |
195 | */ | |
196 | u32 xflags; | |
197 | ||
f8cd5488 JHS |
198 | /* Replay detection notification settings */ |
199 | u32 replay_maxage; | |
200 | u32 replay_maxdiff; | |
201 | ||
202 | /* Replay detection notification timer */ | |
203 | struct timer_list rtimer; | |
204 | ||
1da177e4 LT |
205 | /* Statistics */ |
206 | struct xfrm_stats stats; | |
207 | ||
208 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 209 | struct tasklet_hrtimer mtimer; |
1da177e4 | 210 | |
9afaca05 | 211 | /* Last used time */ |
d26f3984 | 212 | unsigned long lastused; |
9afaca05 | 213 | |
1da177e4 LT |
214 | /* Reference to data common to all the instances of this |
215 | * transformer. */ | |
533cb5b0 | 216 | const struct xfrm_type *type; |
13996378 | 217 | struct xfrm_mode *inner_mode; |
df9dcb45 | 218 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 219 | struct xfrm_mode *outer_mode; |
1da177e4 | 220 | |
df71837d TJ |
221 | /* Security context */ |
222 | struct xfrm_sec_ctx *security; | |
223 | ||
1da177e4 LT |
224 | /* Private data of this transformer, format is opaque, |
225 | * interpreted by xfrm_type methods. */ | |
226 | void *data; | |
227 | }; | |
228 | ||
673c09be AD |
229 | static inline struct net *xs_net(struct xfrm_state *x) |
230 | { | |
231 | return read_pnet(&x->xs_net); | |
232 | } | |
233 | ||
2717096a JHS |
234 | /* xflags - make enum if more show up */ |
235 | #define XFRM_TIME_DEFER 1 | |
236 | ||
1da177e4 LT |
237 | enum { |
238 | XFRM_STATE_VOID, | |
239 | XFRM_STATE_ACQ, | |
240 | XFRM_STATE_VALID, | |
241 | XFRM_STATE_ERROR, | |
242 | XFRM_STATE_EXPIRED, | |
243 | XFRM_STATE_DEAD | |
244 | }; | |
245 | ||
26b15dad | 246 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 247 | struct km_event { |
bf08867f HX |
248 | union { |
249 | u32 hard; | |
250 | u32 proto; | |
251 | u32 byid; | |
f8cd5488 | 252 | u32 aevent; |
f7b6983f | 253 | u32 type; |
bf08867f HX |
254 | } data; |
255 | ||
26b15dad JHS |
256 | u32 seq; |
257 | u32 pid; | |
258 | u32 event; | |
7067802e | 259 | struct net *net; |
26b15dad JHS |
260 | }; |
261 | ||
25ee3286 | 262 | struct net_device; |
1da177e4 LT |
263 | struct xfrm_type; |
264 | struct xfrm_dst; | |
265 | struct xfrm_policy_afinfo { | |
266 | unsigned short family; | |
1da177e4 | 267 | struct dst_ops *dst_ops; |
ddcfd796 | 268 | void (*garbage_collect)(struct net *net); |
c5b3cf46 | 269 | struct dst_entry *(*dst_lookup)(struct net *net, int tos, |
5e6b930f DM |
270 | const xfrm_address_t *saddr, |
271 | const xfrm_address_t *daddr); | |
fbda33b2 | 272 | int (*get_saddr)(struct net *net, xfrm_address_t *saddr, xfrm_address_t *daddr); |
1da177e4 | 273 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
274 | struct flowi *fl, |
275 | int reverse); | |
05d84025 | 276 | int (*get_tos)(const struct flowi *fl); |
a1b05140 MN |
277 | int (*init_path)(struct xfrm_dst *path, |
278 | struct dst_entry *dst, | |
279 | int nfheader_len); | |
25ee3286 | 280 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 281 | struct net_device *dev, |
0c7b3eef | 282 | const struct flowi *fl); |
2774c131 | 283 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
284 | }; |
285 | ||
286 | extern int xfrm_policy_register_afinfo(struct xfrm_policy_afinfo *afinfo); | |
287 | extern int xfrm_policy_unregister_afinfo(struct xfrm_policy_afinfo *afinfo); | |
214e005b DM |
288 | extern void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c); |
289 | extern void km_state_notify(struct xfrm_state *x, const struct km_event *c); | |
1da177e4 LT |
290 | |
291 | struct xfrm_tmpl; | |
980ebd25 | 292 | extern int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); |
53bc6b4d JHS |
293 | extern void km_state_expired(struct xfrm_state *x, int hard, u32 pid); |
294 | extern int __xfrm_state_delete(struct xfrm_state *x); | |
295 | ||
1da177e4 | 296 | struct xfrm_state_afinfo { |
17c2a42a | 297 | unsigned int family; |
36cf9acf | 298 | unsigned int proto; |
8e3d716c | 299 | __be16 eth_proto; |
17c2a42a | 300 | struct module *owner; |
533cb5b0 | 301 | const struct xfrm_type *type_map[IPPROTO_MAX]; |
aa5d62cc | 302 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; |
d094cd83 | 303 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
304 | void (*init_tempsel)(struct xfrm_selector *sel, |
305 | const struct flowi *fl); | |
19bd6244 DM |
306 | void (*init_temprop)(struct xfrm_state *x, |
307 | const struct xfrm_tmpl *tmpl, | |
308 | const xfrm_address_t *daddr, | |
309 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
310 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
311 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
cdca7265 | 312 | int (*output)(struct sk_buff *skb); |
227620e2 HX |
313 | int (*extract_input)(struct xfrm_state *x, |
314 | struct sk_buff *skb); | |
36cf9acf HX |
315 | int (*extract_output)(struct xfrm_state *x, |
316 | struct sk_buff *skb); | |
716062fd HX |
317 | int (*transport_finish)(struct sk_buff *skb, |
318 | int async); | |
1da177e4 LT |
319 | }; |
320 | ||
321 | extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); | |
322 | extern int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
323 | ||
324 | extern void xfrm_state_delete_tunnel(struct xfrm_state *x); | |
325 | ||
fd2c3ef7 | 326 | struct xfrm_type { |
1da177e4 LT |
327 | char *description; |
328 | struct module *owner; | |
a6337463 | 329 | u8 proto; |
330 | u8 flags; | |
1b5c2299 | 331 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 332 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
333 | #define XFRM_TYPE_LOCAL_COADDR 4 |
334 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 335 | |
72cb6962 | 336 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 337 | void (*destructor)(struct xfrm_state *); |
e695633e | 338 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 339 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
340 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
341 | const struct flowi *); | |
aee5adb4 | 342 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 343 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 344 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
345 | }; |
346 | ||
533cb5b0 ED |
347 | extern int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
348 | extern int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 349 | |
b59f45d0 | 350 | struct xfrm_mode { |
227620e2 HX |
351 | /* |
352 | * Remove encapsulation header. | |
353 | * | |
354 | * The IP header will be moved over the top of the encapsulation | |
355 | * header. | |
356 | * | |
357 | * On entry, the transport header shall point to where the IP header | |
358 | * should be and the network header shall be set to where the IP | |
359 | * header currently is. skb->data shall point to the start of the | |
360 | * payload. | |
361 | */ | |
362 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
363 | ||
364 | /* | |
365 | * This is the actual input entry point. | |
366 | * | |
367 | * For transport mode and equivalent this would be identical to | |
368 | * input2 (which does not need to be set). While tunnel mode | |
369 | * and equivalent would set this to the tunnel encapsulation function | |
370 | * xfrm4_prepare_input that would in turn call input2. | |
371 | */ | |
b59f45d0 | 372 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
373 | |
374 | /* | |
375 | * Add encapsulation header. | |
376 | * | |
377 | * On exit, the transport header will be set to the start of the | |
378 | * encapsulation header to be filled in by x->type->output and | |
379 | * the mac header will be set to the nextheader (protocol for | |
380 | * IPv4) field of the extension header directly preceding the | |
381 | * encapsulation header, or in its absence, that of the top IP | |
382 | * header. The value of the network header will always point | |
383 | * to the top IP header while skb->data will point to the payload. | |
384 | */ | |
36cf9acf HX |
385 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
386 | ||
387 | /* | |
388 | * This is the actual output entry point. | |
389 | * | |
390 | * For transport mode and equivalent this would be identical to | |
391 | * output2 (which does not need to be set). While tunnel mode | |
392 | * and equivalent would set this to a tunnel encapsulation function | |
393 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
394 | * call output2. | |
395 | */ | |
396 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 397 | |
17c2a42a | 398 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
399 | struct module *owner; |
400 | unsigned int encap; | |
1bfcb10f HX |
401 | int flags; |
402 | }; | |
403 | ||
404 | /* Flags for xfrm_mode. */ | |
405 | enum { | |
406 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
407 | }; |
408 | ||
409 | extern int xfrm_register_mode(struct xfrm_mode *mode, int family); | |
410 | extern int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 411 | |
df9dcb45 KM |
412 | static inline int xfrm_af2proto(unsigned int family) |
413 | { | |
414 | switch(family) { | |
415 | case AF_INET: | |
416 | return IPPROTO_IPIP; | |
417 | case AF_INET6: | |
418 | return IPPROTO_IPV6; | |
419 | default: | |
420 | return 0; | |
421 | } | |
422 | } | |
423 | ||
424 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
425 | { | |
426 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
427 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
428 | return x->inner_mode; | |
429 | else | |
430 | return x->inner_mode_iaf; | |
431 | } | |
432 | ||
fd2c3ef7 | 433 | struct xfrm_tmpl { |
1da177e4 LT |
434 | /* id in template is interpreted as: |
435 | * daddr - destination of tunnel, may be zero for transport mode. | |
436 | * spi - zero to acquire spi. Not zero if spi is static, then | |
437 | * daddr must be fixed too. | |
438 | * proto - AH/ESP/IPCOMP | |
439 | */ | |
440 | struct xfrm_id id; | |
441 | ||
442 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
443 | xfrm_address_t saddr; | |
444 | ||
76b3f055 MK |
445 | unsigned short encap_family; |
446 | ||
a6337463 | 447 | u32 reqid; |
1da177e4 | 448 | |
7e49e6de | 449 | /* Mode: transport, tunnel etc. */ |
a6337463 | 450 | u8 mode; |
1da177e4 LT |
451 | |
452 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 453 | u8 share; |
1da177e4 LT |
454 | |
455 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 456 | u8 optional; |
1da177e4 | 457 | |
c5d18e98 | 458 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 459 | u8 allalgs; |
c5d18e98 | 460 | |
1da177e4 | 461 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 462 | u32 aalgos; |
463 | u32 ealgos; | |
464 | u32 calgos; | |
1da177e4 LT |
465 | }; |
466 | ||
622dc828 | 467 | #define XFRM_MAX_DEPTH 6 |
1da177e4 | 468 | |
12a169e7 HX |
469 | struct xfrm_policy_walk_entry { |
470 | struct list_head all; | |
471 | u8 dead; | |
472 | }; | |
473 | ||
474 | struct xfrm_policy_walk { | |
475 | struct xfrm_policy_walk_entry walk; | |
476 | u8 type; | |
477 | u32 seq; | |
478 | }; | |
479 | ||
fd2c3ef7 | 480 | struct xfrm_policy { |
0331b1f3 AD |
481 | #ifdef CONFIG_NET_NS |
482 | struct net *xp_net; | |
483 | #endif | |
2518c7c2 DM |
484 | struct hlist_node bydst; |
485 | struct hlist_node byidx; | |
1da177e4 LT |
486 | |
487 | /* This lock only affects elements except for entry. */ | |
488 | rwlock_t lock; | |
489 | atomic_t refcnt; | |
490 | struct timer_list timer; | |
491 | ||
fe1a5f03 | 492 | struct flow_cache_object flo; |
80c802f3 | 493 | atomic_t genid; |
1da177e4 LT |
494 | u32 priority; |
495 | u32 index; | |
bf825f81 | 496 | struct xfrm_mark mark; |
1da177e4 LT |
497 | struct xfrm_selector selector; |
498 | struct xfrm_lifetime_cfg lft; | |
499 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 500 | struct xfrm_policy_walk_entry walk; |
46ca5f5d ACM |
501 | u8 type; |
502 | u8 action; | |
503 | u8 flags; | |
46ca5f5d | 504 | u8 xfrm_nr; |
12a169e7 | 505 | u16 family; |
df71837d | 506 | struct xfrm_sec_ctx *security; |
1da177e4 LT |
507 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
508 | }; | |
509 | ||
63eb23f5 | 510 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
511 | { |
512 | return read_pnet(&xp->xp_net); | |
513 | } | |
514 | ||
13c1d189 AE |
515 | struct xfrm_kmaddress { |
516 | xfrm_address_t local; | |
517 | xfrm_address_t remote; | |
518 | u32 reserved; | |
519 | u16 family; | |
520 | }; | |
521 | ||
80c9abaa SS |
522 | struct xfrm_migrate { |
523 | xfrm_address_t old_daddr; | |
524 | xfrm_address_t old_saddr; | |
525 | xfrm_address_t new_daddr; | |
526 | xfrm_address_t new_saddr; | |
527 | u8 proto; | |
528 | u8 mode; | |
529 | u16 reserved; | |
530 | u32 reqid; | |
531 | u16 old_family; | |
532 | u16 new_family; | |
533 | }; | |
534 | ||
f8cd5488 JHS |
535 | #define XFRM_KM_TIMEOUT 30 |
536 | /* which seqno */ | |
537 | #define XFRM_REPLAY_SEQ 1 | |
538 | #define XFRM_REPLAY_OSEQ 2 | |
539 | #define XFRM_REPLAY_SEQ_MASK 3 | |
540 | /* what happened */ | |
541 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
542 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
543 | ||
544 | /* default aevent timeout in units of 100ms */ | |
545 | #define XFRM_AE_ETIME 10 | |
546 | /* Async Event timer multiplier */ | |
547 | #define XFRM_AE_ETH_M 10 | |
548 | /* default seq threshold size */ | |
549 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 550 | |
fd2c3ef7 | 551 | struct xfrm_mgr { |
1da177e4 LT |
552 | struct list_head list; |
553 | char *id; | |
214e005b | 554 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
1da177e4 | 555 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp, int dir); |
cb969f07 | 556 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 557 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 558 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 559 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
560 | int (*migrate)(const struct xfrm_selector *sel, |
561 | u8 dir, u8 type, | |
562 | const struct xfrm_migrate *m, | |
563 | int num_bundles, | |
564 | const struct xfrm_kmaddress *k); | |
1da177e4 LT |
565 | }; |
566 | ||
567 | extern int xfrm_register_km(struct xfrm_mgr *km); | |
568 | extern int xfrm_unregister_km(struct xfrm_mgr *km); | |
569 | ||
436a0a40 HX |
570 | /* |
571 | * This structure is used for the duration where packets are being | |
572 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
573 | * area beyond the generic IP part may be overwritten. | |
574 | */ | |
575 | struct xfrm_skb_cb { | |
576 | union { | |
577 | struct inet_skb_parm h4; | |
578 | struct inet6_skb_parm h6; | |
579 | } header; | |
580 | ||
581 | /* Sequence number for replay protection. */ | |
b318e0e4 HX |
582 | union { |
583 | u64 output; | |
584 | __be32 input; | |
585 | } seq; | |
436a0a40 HX |
586 | }; |
587 | ||
588 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
589 | ||
36cf9acf HX |
590 | /* |
591 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
592 | * to transmit header information to the mode input/output functions. | |
593 | */ | |
594 | struct xfrm_mode_skb_cb { | |
595 | union { | |
596 | struct inet_skb_parm h4; | |
597 | struct inet6_skb_parm h6; | |
598 | } header; | |
599 | ||
600 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
601 | __be16 id; | |
602 | __be16 frag_off; | |
603 | ||
732c8bd5 HX |
604 | /* IP header length (excluding options or extension headers). */ |
605 | u8 ihl; | |
606 | ||
36cf9acf HX |
607 | /* TOS for IPv4, class for IPv6. */ |
608 | u8 tos; | |
609 | ||
610 | /* TTL for IPv4, hop limitfor IPv6. */ | |
611 | u8 ttl; | |
612 | ||
613 | /* Protocol for IPv4, NH for IPv6. */ | |
614 | u8 protocol; | |
615 | ||
732c8bd5 HX |
616 | /* Option length for IPv4, zero for IPv6. */ |
617 | u8 optlen; | |
618 | ||
36cf9acf HX |
619 | /* Used by IPv6 only, zero for IPv4. */ |
620 | u8 flow_lbl[3]; | |
621 | }; | |
622 | ||
623 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
624 | ||
716062fd HX |
625 | /* |
626 | * This structure is used by the input processing to locate the SPI and | |
627 | * related information. | |
628 | */ | |
629 | struct xfrm_spi_skb_cb { | |
630 | union { | |
631 | struct inet_skb_parm h4; | |
632 | struct inet6_skb_parm h6; | |
633 | } header; | |
634 | ||
716062fd | 635 | unsigned int daddroff; |
2fcb45b6 | 636 | unsigned int family; |
716062fd HX |
637 | }; |
638 | ||
639 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
640 | ||
161a09e7 | 641 | /* Audit Information */ |
fd2c3ef7 | 642 | struct xfrm_audit { |
161a09e7 | 643 | u32 secid; |
2532386f EP |
644 | uid_t loginuid; |
645 | u32 sessionid; | |
161a09e7 | 646 | }; |
c9204d9c JL |
647 | |
648 | #ifdef CONFIG_AUDITSYSCALL | |
afeb14b4 | 649 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
650 | { |
651 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 652 | |
afeb14b4 PM |
653 | if (audit_enabled == 0) |
654 | return NULL; | |
ab5f5e8b | 655 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 656 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
657 | if (audit_buf == NULL) |
658 | return NULL; | |
afeb14b4 PM |
659 | audit_log_format(audit_buf, "op=%s", op); |
660 | return audit_buf; | |
661 | } | |
ab5f5e8b | 662 | |
2532386f | 663 | static inline void xfrm_audit_helper_usrinfo(uid_t auid, u32 ses, u32 secid, |
afeb14b4 PM |
664 | struct audit_buffer *audit_buf) |
665 | { | |
666 | char *secctx; | |
667 | u32 secctx_len; | |
ab5f5e8b | 668 | |
2532386f | 669 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); |
68277acc PM |
670 | if (secid != 0 && |
671 | security_secid_to_secctx(secid, &secctx, &secctx_len) == 0) { | |
ab5f5e8b JL |
672 | audit_log_format(audit_buf, " subj=%s", secctx); |
673 | security_release_secctx(secctx, secctx_len); | |
674 | } else | |
675 | audit_log_task_context(audit_buf); | |
ab5f5e8b JL |
676 | } |
677 | ||
678 | extern void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2532386f | 679 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 680 | extern void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, |
2532386f | 681 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 682 | extern void xfrm_audit_state_add(struct xfrm_state *x, int result, |
2532386f | 683 | u32 auid, u32 ses, u32 secid); |
ab5f5e8b | 684 | extern void xfrm_audit_state_delete(struct xfrm_state *x, int result, |
2532386f | 685 | u32 auid, u32 ses, u32 secid); |
afeb14b4 PM |
686 | extern void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
687 | struct sk_buff *skb); | |
688 | extern void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
689 | extern void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
690 | __be32 net_spi, __be32 net_seq); | |
691 | extern void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
692 | struct sk_buff *skb, u8 proto); | |
c9204d9c | 693 | #else |
41fef0ee MS |
694 | |
695 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
696 | u32 auid, u32 ses, u32 secid) | |
697 | { | |
698 | } | |
699 | ||
700 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
701 | u32 auid, u32 ses, u32 secid) | |
702 | { | |
703 | } | |
704 | ||
705 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
706 | u32 auid, u32 ses, u32 secid) | |
707 | { | |
708 | } | |
709 | ||
710 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
711 | u32 auid, u32 ses, u32 secid) | |
712 | { | |
713 | } | |
714 | ||
715 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
716 | struct sk_buff *skb) | |
717 | { | |
718 | } | |
719 | ||
720 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, | |
721 | u16 family) | |
722 | { | |
723 | } | |
724 | ||
725 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
726 | __be32 net_spi, __be32 net_seq) | |
727 | { | |
728 | } | |
729 | ||
730 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
731 | struct sk_buff *skb, u8 proto) | |
732 | { | |
733 | } | |
c9204d9c | 734 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 735 | |
1da177e4 LT |
736 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
737 | { | |
738 | if (likely(policy != NULL)) | |
739 | atomic_inc(&policy->refcnt); | |
740 | } | |
741 | ||
64c31b3f | 742 | extern void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
743 | |
744 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
745 | { | |
746 | if (atomic_dec_and_test(&policy->refcnt)) | |
64c31b3f | 747 | xfrm_policy_destroy(policy); |
1da177e4 LT |
748 | } |
749 | ||
4e81bb83 MN |
750 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
751 | { | |
752 | int i; | |
753 | for (i = npols - 1; i >= 0; --i) | |
754 | xfrm_pol_put(pols[i]); | |
755 | } | |
4e81bb83 | 756 | |
1da177e4 LT |
757 | extern void __xfrm_state_destroy(struct xfrm_state *); |
758 | ||
21380b81 HX |
759 | static inline void __xfrm_state_put(struct xfrm_state *x) |
760 | { | |
761 | atomic_dec(&x->refcnt); | |
762 | } | |
763 | ||
1da177e4 LT |
764 | static inline void xfrm_state_put(struct xfrm_state *x) |
765 | { | |
766 | if (atomic_dec_and_test(&x->refcnt)) | |
767 | __xfrm_state_destroy(x); | |
768 | } | |
769 | ||
770 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
771 | { | |
772 | atomic_inc(&x->refcnt); | |
773 | } | |
774 | ||
1744a8fe DM |
775 | static inline bool addr_match(const void *token1, const void *token2, |
776 | int prefixlen) | |
1da177e4 | 777 | { |
1744a8fe DM |
778 | const __be32 *a1 = token1; |
779 | const __be32 *a2 = token2; | |
1da177e4 LT |
780 | int pdw; |
781 | int pbi; | |
782 | ||
a6337463 | 783 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
784 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
785 | ||
786 | if (pdw) | |
787 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 788 | return false; |
1da177e4 LT |
789 | |
790 | if (pbi) { | |
5f19343f | 791 | __be32 mask; |
1da177e4 LT |
792 | |
793 | mask = htonl((0xffffffff) << (32 - pbi)); | |
794 | ||
795 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 796 | return false; |
1da177e4 LT |
797 | } |
798 | ||
1744a8fe | 799 | return true; |
1da177e4 LT |
800 | } |
801 | ||
802 | static __inline__ | |
e8a4e377 | 803 | __be16 xfrm_flowi_sport(const struct flowi *fl) |
1da177e4 | 804 | { |
f9d07e41 | 805 | __be16 port; |
1da177e4 LT |
806 | switch(fl->proto) { |
807 | case IPPROTO_TCP: | |
808 | case IPPROTO_UDP: | |
ba4e58ec | 809 | case IPPROTO_UDPLITE: |
1da177e4 LT |
810 | case IPPROTO_SCTP: |
811 | port = fl->fl_ip_sport; | |
812 | break; | |
813 | case IPPROTO_ICMP: | |
814 | case IPPROTO_ICMPV6: | |
815 | port = htons(fl->fl_icmp_type); | |
816 | break; | |
2ce4272a MN |
817 | case IPPROTO_MH: |
818 | port = htons(fl->fl_mh_type); | |
819 | break; | |
cc9ff19d | 820 | case IPPROTO_GRE: |
aa285b17 | 821 | port = htons(ntohl(fl->fl_gre_key) >> 16); |
cc9ff19d | 822 | break; |
1da177e4 LT |
823 | default: |
824 | port = 0; /*XXX*/ | |
825 | } | |
826 | return port; | |
827 | } | |
828 | ||
829 | static __inline__ | |
e8a4e377 | 830 | __be16 xfrm_flowi_dport(const struct flowi *fl) |
1da177e4 | 831 | { |
f9d07e41 | 832 | __be16 port; |
1da177e4 LT |
833 | switch(fl->proto) { |
834 | case IPPROTO_TCP: | |
835 | case IPPROTO_UDP: | |
ba4e58ec | 836 | case IPPROTO_UDPLITE: |
1da177e4 LT |
837 | case IPPROTO_SCTP: |
838 | port = fl->fl_ip_dport; | |
839 | break; | |
840 | case IPPROTO_ICMP: | |
841 | case IPPROTO_ICMPV6: | |
842 | port = htons(fl->fl_icmp_code); | |
843 | break; | |
cc9ff19d | 844 | case IPPROTO_GRE: |
aa285b17 | 845 | port = htons(ntohl(fl->fl_gre_key) & 0xffff); |
cc9ff19d | 846 | break; |
1da177e4 LT |
847 | default: |
848 | port = 0; /*XXX*/ | |
849 | } | |
850 | return port; | |
851 | } | |
852 | ||
200ce96e | 853 | extern int xfrm_selector_match(const struct xfrm_selector *sel, |
e1ad2ab2 | 854 | const struct flowi *fl, |
77681021 | 855 | unsigned short family); |
1da177e4 | 856 | |
df71837d TJ |
857 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
858 | /* If neither has a context --> match | |
859 | * Otherwise, both must have a context and the sids, doi, alg must match | |
860 | */ | |
861 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
862 | { | |
863 | return ((!s1 && !s2) || | |
864 | (s1 && s2 && | |
865 | (s1->ctx_sid == s2->ctx_sid) && | |
866 | (s1->ctx_doi == s2->ctx_doi) && | |
867 | (s1->ctx_alg == s2->ctx_alg))); | |
868 | } | |
869 | #else | |
870 | static inline int xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) | |
871 | { | |
872 | return 1; | |
873 | } | |
874 | #endif | |
875 | ||
1da177e4 LT |
876 | /* A struct encoding bundle of transformations to apply to some set of flow. |
877 | * | |
878 | * dst->child points to the next element of bundle. | |
879 | * dst->xfrm points to an instanse of transformer. | |
880 | * | |
881 | * Due to unfortunate limitations of current routing cache, which we | |
882 | * have no time to fix, it mirrors struct rtable and bound to the same | |
883 | * routing key, including saddr,daddr. However, we can have many of | |
884 | * bundles differing by session id. All the bundles grow from a parent | |
885 | * policy rule. | |
886 | */ | |
fd2c3ef7 | 887 | struct xfrm_dst { |
1da177e4 | 888 | union { |
1da177e4 LT |
889 | struct dst_entry dst; |
890 | struct rtable rt; | |
891 | struct rt6_info rt6; | |
892 | } u; | |
893 | struct dst_entry *route; | |
80c802f3 TT |
894 | struct flow_cache_object flo; |
895 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; | |
896 | int num_pols, num_xfrms; | |
157bfc25 MN |
897 | #ifdef CONFIG_XFRM_SUB_POLICY |
898 | struct flowi *origin; | |
899 | struct xfrm_selector *partner; | |
900 | #endif | |
80c802f3 TT |
901 | u32 xfrm_genid; |
902 | u32 policy_genid; | |
1da177e4 LT |
903 | u32 route_mtu_cached; |
904 | u32 child_mtu_cached; | |
92d63dec HY |
905 | u32 route_cookie; |
906 | u32 path_cookie; | |
1da177e4 LT |
907 | }; |
908 | ||
def8b4fa | 909 | #ifdef CONFIG_XFRM |
aabc9761 HX |
910 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
911 | { | |
80c802f3 | 912 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
913 | dst_release(xdst->route); |
914 | if (likely(xdst->u.dst.xfrm)) | |
915 | xfrm_state_put(xdst->u.dst.xfrm); | |
157bfc25 MN |
916 | #ifdef CONFIG_XFRM_SUB_POLICY |
917 | kfree(xdst->origin); | |
918 | xdst->origin = NULL; | |
919 | kfree(xdst->partner); | |
920 | xdst->partner = NULL; | |
921 | #endif | |
aabc9761 | 922 | } |
def8b4fa | 923 | #endif |
aabc9761 HX |
924 | |
925 | extern void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); | |
926 | ||
fd2c3ef7 | 927 | struct sec_path { |
1da177e4 LT |
928 | atomic_t refcnt; |
929 | int len; | |
dbe5b4aa | 930 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
1da177e4 LT |
931 | }; |
932 | ||
933 | static inline struct sec_path * | |
934 | secpath_get(struct sec_path *sp) | |
935 | { | |
936 | if (sp) | |
937 | atomic_inc(&sp->refcnt); | |
938 | return sp; | |
939 | } | |
940 | ||
941 | extern void __secpath_destroy(struct sec_path *sp); | |
942 | ||
943 | static inline void | |
944 | secpath_put(struct sec_path *sp) | |
945 | { | |
946 | if (sp && atomic_dec_and_test(&sp->refcnt)) | |
947 | __secpath_destroy(sp); | |
948 | } | |
949 | ||
950 | extern struct sec_path *secpath_dup(struct sec_path *src); | |
951 | ||
952 | static inline void | |
953 | secpath_reset(struct sk_buff *skb) | |
954 | { | |
955 | #ifdef CONFIG_XFRM | |
956 | secpath_put(skb->sp); | |
957 | skb->sp = NULL; | |
958 | #endif | |
959 | } | |
960 | ||
a1e59abf | 961 | static inline int |
6cc32961 | 962 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
963 | { |
964 | switch (family) { | |
965 | case AF_INET: | |
966 | return addr->a4 == 0; | |
967 | case AF_INET6: | |
968 | return ipv6_addr_any((struct in6_addr *)&addr->a6); | |
969 | } | |
970 | return 0; | |
971 | } | |
972 | ||
1da177e4 | 973 | static inline int |
21eddb5c | 974 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
975 | { |
976 | return (tmpl->saddr.a4 && | |
977 | tmpl->saddr.a4 != x->props.saddr.a4); | |
978 | } | |
979 | ||
980 | static inline int | |
21eddb5c | 981 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
982 | { |
983 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
984 | ipv6_addr_cmp((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); | |
985 | } | |
986 | ||
987 | static inline int | |
21eddb5c | 988 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
989 | { |
990 | switch (family) { | |
991 | case AF_INET: | |
992 | return __xfrm4_state_addr_cmp(tmpl, x); | |
993 | case AF_INET6: | |
994 | return __xfrm6_state_addr_cmp(tmpl, x); | |
995 | } | |
996 | return !0; | |
997 | } | |
998 | ||
999 | #ifdef CONFIG_XFRM | |
1da177e4 LT |
1000 | extern int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, unsigned short family); |
1001 | ||
d5422efe HX |
1002 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1003 | struct sk_buff *skb, | |
1004 | unsigned int family, int reverse) | |
1da177e4 | 1005 | { |
f6e1e25d | 1006 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1007 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1008 | ||
1da177e4 | 1009 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1010 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1011 | |
f6e1e25d | 1012 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1013 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1014 | __xfrm_policy_check(sk, ndir, skb, family); |
1015 | } | |
1016 | ||
1017 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1018 | { | |
1019 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1020 | } |
1021 | ||
1022 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1023 | { | |
1024 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1025 | } | |
1026 | ||
1027 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1028 | { | |
1029 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1030 | } | |
1031 | ||
d5422efe HX |
1032 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1033 | struct sk_buff *skb) | |
1034 | { | |
1035 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1036 | } | |
1037 | ||
1038 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1039 | struct sk_buff *skb) | |
1040 | { | |
1041 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1042 | } | |
1043 | ||
1044 | extern int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1045 | unsigned int family, int reverse); | |
1046 | ||
1047 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1048 | unsigned int family) | |
1049 | { | |
1050 | return __xfrm_decode_session(skb, fl, family, 0); | |
1051 | } | |
1052 | ||
1053 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1054 | struct flowi *fl, | |
1055 | unsigned int family) | |
1056 | { | |
1057 | return __xfrm_decode_session(skb, fl, family, 1); | |
1058 | } | |
1059 | ||
1da177e4 LT |
1060 | extern int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1061 | ||
1062 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1063 | { | |
99a66657 AD |
1064 | struct net *net = dev_net(skb->dev); |
1065 | ||
1066 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1067 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1068 | __xfrm_route_forward(skb, family); |
1069 | } | |
1070 | ||
1071 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1072 | { | |
1073 | return xfrm_route_forward(skb, AF_INET); | |
1074 | } | |
1075 | ||
1076 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1077 | { | |
1078 | return xfrm_route_forward(skb, AF_INET6); | |
1079 | } | |
1080 | ||
1081 | extern int __xfrm_sk_clone_policy(struct sock *sk); | |
1082 | ||
1083 | static inline int xfrm_sk_clone_policy(struct sock *sk) | |
1084 | { | |
1085 | if (unlikely(sk->sk_policy[0] || sk->sk_policy[1])) | |
1086 | return __xfrm_sk_clone_policy(sk); | |
1087 | return 0; | |
1088 | } | |
1089 | ||
4666faab | 1090 | extern int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1091 | |
1092 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1093 | { | |
1094 | if (unlikely(sk->sk_policy[0] != NULL)) { | |
1095 | xfrm_policy_delete(sk->sk_policy[0], XFRM_POLICY_MAX); | |
1096 | sk->sk_policy[0] = NULL; | |
1097 | } | |
1098 | if (unlikely(sk->sk_policy[1] != NULL)) { | |
1099 | xfrm_policy_delete(sk->sk_policy[1], XFRM_POLICY_MAX+1); | |
1100 | sk->sk_policy[1] = NULL; | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | #else | |
1105 | ||
1106 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
1107 | static inline int xfrm_sk_clone_policy(struct sock *sk) { return 0; } | |
1108 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } | |
1109 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1110 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1111 | { | |
1112 | return 1; | |
1113 | } | |
1114 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1115 | { | |
1116 | return 1; | |
1117 | } | |
1118 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1119 | { | |
1120 | return 1; | |
1121 | } | |
d5422efe HX |
1122 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1123 | struct flowi *fl, | |
1124 | unsigned int family) | |
1125 | { | |
1126 | return -ENOSYS; | |
1127 | } | |
1128 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1129 | struct sk_buff *skb) | |
1130 | { | |
1131 | return 1; | |
1132 | } | |
1133 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1134 | struct sk_buff *skb) | |
1135 | { | |
1136 | return 1; | |
1137 | } | |
1da177e4 LT |
1138 | #endif |
1139 | ||
1140 | static __inline__ | |
e8a4e377 | 1141 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1142 | { |
1143 | switch (family){ | |
1144 | case AF_INET: | |
1145 | return (xfrm_address_t *)&fl->fl4_dst; | |
1146 | case AF_INET6: | |
1147 | return (xfrm_address_t *)&fl->fl6_dst; | |
1148 | } | |
1149 | return NULL; | |
1150 | } | |
1151 | ||
1152 | static __inline__ | |
e8a4e377 | 1153 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1154 | { |
1155 | switch (family){ | |
1156 | case AF_INET: | |
1157 | return (xfrm_address_t *)&fl->fl4_src; | |
1158 | case AF_INET6: | |
1159 | return (xfrm_address_t *)&fl->fl6_src; | |
1160 | } | |
1161 | return NULL; | |
1162 | } | |
1163 | ||
9bb182a7 | 1164 | static __inline__ |
e8a4e377 | 1165 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1166 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1167 | unsigned short family) | |
1168 | { | |
1169 | switch(family) { | |
1170 | case AF_INET: | |
1171 | memcpy(&saddr->a4, &fl->fl4_src, sizeof(saddr->a4)); | |
1172 | memcpy(&daddr->a4, &fl->fl4_dst, sizeof(daddr->a4)); | |
1173 | break; | |
1174 | case AF_INET6: | |
1175 | ipv6_addr_copy((struct in6_addr *)&saddr->a6, &fl->fl6_src); | |
1176 | ipv6_addr_copy((struct in6_addr *)&daddr->a6, &fl->fl6_dst); | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | ||
1da177e4 | 1181 | static __inline__ int |
f8848067 DM |
1182 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1183 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1184 | { |
1185 | if (daddr->a4 == x->id.daddr.a4 && | |
1186 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1187 | return 1; | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static __inline__ int | |
f8848067 DM |
1192 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1193 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1194 | { |
1195 | if (!ipv6_addr_cmp((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && | |
1196 | (!ipv6_addr_cmp((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr)|| | |
1197 | ipv6_addr_any((struct in6_addr *)saddr) || | |
1198 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1199 | return 1; | |
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static __inline__ int | |
f8848067 DM |
1204 | xfrm_state_addr_check(const struct xfrm_state *x, |
1205 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1206 | unsigned short family) |
1207 | { | |
1208 | switch (family) { | |
1209 | case AF_INET: | |
1210 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1211 | case AF_INET6: | |
1212 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1213 | } | |
1214 | return 0; | |
1215 | } | |
1216 | ||
e53820de | 1217 | static __inline__ int |
f8848067 | 1218 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1219 | unsigned short family) |
1220 | { | |
1221 | switch (family) { | |
1222 | case AF_INET: | |
1223 | return __xfrm4_state_addr_check(x, | |
f8848067 DM |
1224 | (const xfrm_address_t *)&fl->fl4_dst, |
1225 | (const xfrm_address_t *)&fl->fl4_src); | |
e53820de MN |
1226 | case AF_INET6: |
1227 | return __xfrm6_state_addr_check(x, | |
f8848067 DM |
1228 | (const xfrm_address_t *)&fl->fl6_dst, |
1229 | (const xfrm_address_t *)&fl->fl6_src); | |
e53820de MN |
1230 | } |
1231 | return 0; | |
1232 | } | |
1233 | ||
f8848067 | 1234 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1235 | { |
1236 | return atomic_read(&x->tunnel_users); | |
1237 | } | |
1238 | ||
5794708f MN |
1239 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1240 | { | |
dc00a525 MN |
1241 | return (!userproto || proto == userproto || |
1242 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1243 | proto == IPPROTO_ESP || | |
1244 | proto == IPPROTO_COMP))); | |
5794708f MN |
1245 | } |
1246 | ||
1da177e4 LT |
1247 | /* |
1248 | * xfrm algorithm information | |
1249 | */ | |
1a6509d9 HX |
1250 | struct xfrm_algo_aead_info { |
1251 | u16 icv_truncbits; | |
1252 | }; | |
1253 | ||
1da177e4 LT |
1254 | struct xfrm_algo_auth_info { |
1255 | u16 icv_truncbits; | |
1256 | u16 icv_fullbits; | |
1257 | }; | |
1258 | ||
1259 | struct xfrm_algo_encr_info { | |
1260 | u16 blockbits; | |
1261 | u16 defkeybits; | |
1262 | }; | |
1263 | ||
1264 | struct xfrm_algo_comp_info { | |
1265 | u16 threshold; | |
1266 | }; | |
1267 | ||
1268 | struct xfrm_algo_desc { | |
1269 | char *name; | |
04ff1260 | 1270 | char *compat; |
1da177e4 LT |
1271 | u8 available:1; |
1272 | union { | |
1a6509d9 | 1273 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1274 | struct xfrm_algo_auth_info auth; |
1275 | struct xfrm_algo_encr_info encr; | |
1276 | struct xfrm_algo_comp_info comp; | |
1277 | } uinfo; | |
1278 | struct sadb_alg desc; | |
1279 | }; | |
1280 | ||
1281 | /* XFRM tunnel handlers. */ | |
1282 | struct xfrm_tunnel { | |
1283 | int (*handler)(struct sk_buff *skb); | |
a6337463 | 1284 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1285 | |
b33eab08 | 1286 | struct xfrm_tunnel __rcu *next; |
d2acc347 | 1287 | int priority; |
1da177e4 LT |
1288 | }; |
1289 | ||
1290 | struct xfrm6_tunnel { | |
d2acc347 HX |
1291 | int (*handler)(struct sk_buff *skb); |
1292 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1293 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1294 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1295 | int priority; |
1da177e4 LT |
1296 | }; |
1297 | ||
1298 | extern void xfrm_init(void); | |
a33bc5c1 | 1299 | extern void xfrm4_init(int rt_hash_size); |
d62ddc21 AD |
1300 | extern int xfrm_state_init(struct net *net); |
1301 | extern void xfrm_state_fini(struct net *net); | |
1da177e4 | 1302 | extern void xfrm4_state_init(void); |
c35b7e72 DL |
1303 | #ifdef CONFIG_XFRM |
1304 | extern int xfrm6_init(void); | |
1305 | extern void xfrm6_fini(void); | |
0013caba | 1306 | extern int xfrm6_state_init(void); |
1da177e4 | 1307 | extern void xfrm6_state_fini(void); |
c35b7e72 DL |
1308 | #else |
1309 | static inline int xfrm6_init(void) | |
1310 | { | |
1311 | return 0; | |
1312 | } | |
1313 | static inline void xfrm6_fini(void) | |
1314 | { | |
1315 | ; | |
1316 | } | |
1317 | #endif | |
1da177e4 | 1318 | |
558f82ef | 1319 | #ifdef CONFIG_XFRM_STATISTICS |
c68cd1a0 AD |
1320 | extern int xfrm_proc_init(struct net *net); |
1321 | extern void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1322 | #endif |
1323 | ||
b27aeadb AD |
1324 | extern int xfrm_sysctl_init(struct net *net); |
1325 | #ifdef CONFIG_SYSCTL | |
1326 | extern void xfrm_sysctl_fini(struct net *net); | |
1327 | #else | |
1328 | static inline void xfrm_sysctl_fini(struct net *net) | |
1329 | { | |
1330 | } | |
1331 | #endif | |
1332 | ||
5c182458 | 1333 | extern void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto); |
284fa7da | 1334 | extern int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
4c563f76 | 1335 | int (*func)(struct xfrm_state *, int, void*), void *); |
abb81c4f | 1336 | extern void xfrm_state_walk_done(struct xfrm_state_walk *walk); |
673c09be | 1337 | extern struct xfrm_state *xfrm_state_alloc(struct net *net); |
33765d06 DM |
1338 | extern struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, |
1339 | const xfrm_address_t *saddr, | |
b520e9f6 DM |
1340 | const struct flowi *fl, |
1341 | struct xfrm_tmpl *tmpl, | |
1da177e4 LT |
1342 | struct xfrm_policy *pol, int *err, |
1343 | unsigned short family); | |
bd55775c | 1344 | extern struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, |
5447c5e4 | 1345 | xfrm_address_t *daddr, |
628529b6 JHS |
1346 | xfrm_address_t *saddr, |
1347 | unsigned short family, | |
1348 | u8 mode, u8 proto, u32 reqid); | |
1da177e4 LT |
1349 | extern int xfrm_state_check_expire(struct xfrm_state *x); |
1350 | extern void xfrm_state_insert(struct xfrm_state *x); | |
1351 | extern int xfrm_state_add(struct xfrm_state *x); | |
1352 | extern int xfrm_state_update(struct xfrm_state *x); | |
bd55775c | 1353 | extern struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, |
a70486f0 | 1354 | const xfrm_address_t *daddr, __be32 spi, |
bd55775c JHS |
1355 | u8 proto, unsigned short family); |
1356 | extern struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
a70486f0 DM |
1357 | const xfrm_address_t *daddr, |
1358 | const xfrm_address_t *saddr, | |
bd55775c JHS |
1359 | u8 proto, |
1360 | unsigned short family); | |
41a49cc3 MN |
1361 | #ifdef CONFIG_XFRM_SUB_POLICY |
1362 | extern int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1363 | int n, unsigned short family); | |
1364 | extern int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1365 | int n, unsigned short family); | |
1366 | #else | |
1367 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
1368 | int n, unsigned short family) | |
1369 | { | |
1370 | return -ENOSYS; | |
1371 | } | |
1372 | ||
1373 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1374 | int n, unsigned short family) | |
1375 | { | |
1376 | return -ENOSYS; | |
1377 | } | |
1378 | #endif | |
af11e316 JHS |
1379 | |
1380 | struct xfrmk_sadinfo { | |
1381 | u32 sadhcnt; /* current hash bkts */ | |
1382 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1383 | u32 sadcnt; /* current running count */ | |
1384 | }; | |
1385 | ||
5a6d3416 JHS |
1386 | struct xfrmk_spdinfo { |
1387 | u32 incnt; | |
1388 | u32 outcnt; | |
1389 | u32 fwdcnt; | |
1390 | u32 inscnt; | |
1391 | u32 outscnt; | |
1392 | u32 fwdscnt; | |
1393 | u32 spdhcnt; | |
1394 | u32 spdhmcnt; | |
1395 | }; | |
1396 | ||
bd55775c JHS |
1397 | extern struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, |
1398 | u32 seq); | |
26b15dad | 1399 | extern int xfrm_state_delete(struct xfrm_state *x); |
0e602451 | 1400 | extern int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info); |
e071041b AD |
1401 | extern void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1402 | extern void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
afeb14b4 PM |
1403 | extern int xfrm_replay_check(struct xfrm_state *x, |
1404 | struct sk_buff *skb, __be32 seq); | |
61f4627b | 1405 | extern void xfrm_replay_advance(struct xfrm_state *x, __be32 seq); |
f8cd5488 | 1406 | extern void xfrm_replay_notify(struct xfrm_state *x, int event); |
1da177e4 | 1407 | extern int xfrm_state_mtu(struct xfrm_state *x, int mtu); |
72cb6962 | 1408 | extern int xfrm_init_state(struct xfrm_state *x); |
227620e2 | 1409 | extern int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); |
716062fd HX |
1410 | extern int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, |
1411 | int encap_type); | |
1bf06cd2 | 1412 | extern int xfrm_input_resume(struct sk_buff *skb, int nexthdr); |
c6581a45 | 1413 | extern int xfrm_output_resume(struct sk_buff *skb, int err); |
406ef77c | 1414 | extern int xfrm_output(struct sk_buff *skb); |
df9dcb45 | 1415 | extern int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
36cf9acf | 1416 | extern int xfrm4_extract_header(struct sk_buff *skb); |
227620e2 | 1417 | extern int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
c4541b41 HX |
1418 | extern int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, |
1419 | int encap_type); | |
716062fd | 1420 | extern int xfrm4_transport_finish(struct sk_buff *skb, int async); |
1da177e4 | 1421 | extern int xfrm4_rcv(struct sk_buff *skb); |
c4541b41 HX |
1422 | |
1423 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1424 | { | |
1425 | return xfrm4_rcv_encap(skb, nexthdr, spi, 0); | |
1426 | } | |
1427 | ||
36cf9acf HX |
1428 | extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1429 | extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1430 | extern int xfrm4_output(struct sk_buff *skb); |
c0d56408 KM |
1431 | extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1432 | extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
36cf9acf | 1433 | extern int xfrm6_extract_header(struct sk_buff *skb); |
227620e2 | 1434 | extern int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); |
33b5ecb8 | 1435 | extern int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi); |
716062fd | 1436 | extern int xfrm6_transport_finish(struct sk_buff *skb, int async); |
e5bbef20 | 1437 | extern int xfrm6_rcv(struct sk_buff *skb); |
fbd9a5b4 MN |
1438 | extern int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, |
1439 | xfrm_address_t *saddr, u8 proto); | |
73d605d1 KM |
1440 | extern int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
1441 | extern int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); | |
a1664773 | 1442 | extern __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
a1664773 | 1443 | extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr); |
36cf9acf HX |
1444 | extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1445 | extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
1da177e4 | 1446 | extern int xfrm6_output(struct sk_buff *skb); |
aee5adb4 MN |
1447 | extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1448 | u8 **prevhdr); | |
1da177e4 LT |
1449 | |
1450 | #ifdef CONFIG_XFRM | |
067b207b | 1451 | extern int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1da177e4 | 1452 | extern int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen); |
1da177e4 LT |
1453 | #else |
1454 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1455 | { | |
1456 | return -ENOPROTOOPT; | |
1457 | } | |
1458 | ||
067b207b | 1459 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1460 | { |
1461 | /* should not happen */ | |
1462 | kfree_skb(skb); | |
1463 | return 0; | |
1464 | } | |
1da177e4 LT |
1465 | #endif |
1466 | ||
0331b1f3 | 1467 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1468 | |
12a169e7 | 1469 | extern void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
cdcbca7c | 1470 | extern int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, |
4c563f76 | 1471 | int (*func)(struct xfrm_policy *, int, int, void*), void *); |
12a169e7 | 1472 | extern void xfrm_policy_walk_done(struct xfrm_policy_walk *walk); |
1da177e4 | 1473 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1474 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1475 | u8 type, int dir, | |
4e81bb83 | 1476 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1477 | struct xfrm_sec_ctx *ctx, int delete, |
1478 | int *err); | |
8ca2e93b | 1479 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, u32 id, int delete, int *err); |
33ffbbd5 | 1480 | int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info); |
1da177e4 | 1481 | u32 xfrm_get_acqseq(void); |
658b219e | 1482 | extern int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
bd55775c JHS |
1483 | struct xfrm_state *xfrm_find_acq(struct net *net, struct xfrm_mark *mark, |
1484 | u8 mode, u32 reqid, u8 proto, | |
a70486f0 DM |
1485 | const xfrm_address_t *daddr, |
1486 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1487 | unsigned short family); |
1da177e4 | 1488 | extern int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1489 | |
80c9abaa | 1490 | #ifdef CONFIG_XFRM_MIGRATE |
183cad12 DM |
1491 | extern int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1492 | const struct xfrm_migrate *m, int num_bundles, | |
1493 | const struct xfrm_kmaddress *k); | |
80c9abaa SS |
1494 | extern struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m); |
1495 | extern struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, | |
1496 | struct xfrm_migrate *m); | |
b4b7c0b3 | 1497 | extern int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
13c1d189 AE |
1498 | struct xfrm_migrate *m, int num_bundles, |
1499 | struct xfrm_kmaddress *k); | |
80c9abaa SS |
1500 | #endif |
1501 | ||
5d36b180 | 1502 | extern int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
6c5c8ca7 | 1503 | extern void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid); |
db983c11 | 1504 | extern int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
1da177e4 LT |
1505 | |
1506 | extern void xfrm_input_init(void); | |
6067b2ba | 1507 | extern int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
1da177e4 LT |
1508 | |
1509 | extern void xfrm_probe_algs(void); | |
1510 | extern int xfrm_count_auth_supported(void); | |
1511 | extern int xfrm_count_enc_supported(void); | |
1512 | extern struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1513 | extern struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1514 | extern struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1515 | extern struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1516 | extern struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
6f2f19ed DM |
1517 | extern struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); |
1518 | extern struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1519 | extern struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1520 | extern struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1a6509d9 | 1521 | int probe); |
1da177e4 | 1522 | |
07d4ee58 | 1523 | struct hash_desc; |
9409f38a | 1524 | struct scatterlist; |
07d4ee58 HX |
1525 | typedef int (icv_update_fn_t)(struct hash_desc *, struct scatterlist *, |
1526 | unsigned int); | |
1da177e4 | 1527 | |
ff6acd16 DM |
1528 | static inline int xfrm_addr_cmp(const xfrm_address_t *a, |
1529 | const xfrm_address_t *b, | |
1da177e4 LT |
1530 | int family) |
1531 | { | |
1532 | switch (family) { | |
1533 | default: | |
1534 | case AF_INET: | |
a6337463 | 1535 | return (__force u32)a->a4 - (__force u32)b->a4; |
1da177e4 LT |
1536 | case AF_INET6: |
1537 | return ipv6_addr_cmp((struct in6_addr *)a, | |
1538 | (struct in6_addr *)b); | |
1539 | } | |
1540 | } | |
1541 | ||
77d8d7a6 HX |
1542 | static inline int xfrm_policy_id2dir(u32 index) |
1543 | { | |
1544 | return index & 7; | |
1545 | } | |
1546 | ||
a6483b79 AD |
1547 | #ifdef CONFIG_XFRM |
1548 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1549 | { |
be33690d PM |
1550 | struct sock *nlsk; |
1551 | int ret = 0; | |
1552 | ||
1553 | rcu_read_lock(); | |
a6483b79 | 1554 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1555 | if (nlsk) |
1556 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1557 | rcu_read_unlock(); | |
1558 | return ret; | |
f8cd5488 | 1559 | } |
a6483b79 | 1560 | #endif |
f8cd5488 | 1561 | |
85158621 | 1562 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1563 | { |
1564 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1565 | } | |
1566 | ||
85158621 | 1567 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1568 | { |
1569 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1570 | } | |
1571 | ||
80c9abaa SS |
1572 | #ifdef CONFIG_XFRM_MIGRATE |
1573 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) | |
1574 | { | |
0f99be0d | 1575 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1576 | } |
1577 | ||
4447bb33 MW |
1578 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1579 | { | |
1580 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1581 | } | |
1582 | ||
80c9abaa SS |
1583 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1584 | { | |
1585 | int i; | |
1586 | for (i = 0; i < n; i++) | |
1587 | xfrm_state_put(*(states + i)); | |
1588 | } | |
1589 | ||
1590 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1591 | { | |
1592 | int i; | |
1593 | for (i = 0; i < n; i++) | |
1594 | xfrm_state_delete(*(states + i)); | |
1595 | } | |
1596 | #endif | |
f8cd5488 | 1597 | |
def8b4fa | 1598 | #ifdef CONFIG_XFRM |
00501121 HX |
1599 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1600 | { | |
1601 | return skb->sp->xvec[skb->sp->len - 1]; | |
1602 | } | |
def8b4fa | 1603 | #endif |
00501121 | 1604 | |
bf825f81 JHS |
1605 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1606 | { | |
1607 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1608 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1609 | else |
1610 | m->v = m->m = 0; | |
1611 | ||
1612 | return m->v & m->m; | |
1613 | } | |
1614 | ||
e3dfa389 | 1615 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 JHS |
1616 | { |
1617 | if (m->m | m->v) | |
1618 | NLA_PUT(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1619 | return 0; | |
1620 | ||
1621 | nla_put_failure: | |
1622 | return -1; | |
1623 | } | |
1624 | ||
1da177e4 | 1625 | #endif /* _NET_XFRM_H */ |