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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> |
88755e9c | 16 | #include <linux/refcount.h> |
1da177e4 LT |
17 | |
18 | #include <net/sock.h> | |
19 | #include <net/dst.h> | |
436a0a40 | 20 | #include <net/ip.h> |
1da177e4 LT |
21 | #include <net/route.h> |
22 | #include <net/ipv6.h> | |
23 | #include <net/ip6_fib.h> | |
fe1a5f03 | 24 | #include <net/flow.h> |
9e0d57fd YP |
25 | |
26 | #include <linux/interrupt.h> | |
27 | ||
558f82ef MN |
28 | #ifdef CONFIG_XFRM_STATISTICS |
29 | #include <net/snmp.h> | |
30 | #endif | |
1da177e4 | 31 | |
d3d6dd3a MN |
32 | #define XFRM_PROTO_ESP 50 |
33 | #define XFRM_PROTO_AH 51 | |
34 | #define XFRM_PROTO_COMP 108 | |
35 | #define XFRM_PROTO_IPIP 4 | |
36 | #define XFRM_PROTO_IPV6 41 | |
37 | #define XFRM_PROTO_ROUTING IPPROTO_ROUTING | |
38 | #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS | |
39 | ||
fa9921e4 | 40 | #define XFRM_ALIGN4(len) (((len) + 3) & ~3) |
1da177e4 | 41 | #define XFRM_ALIGN8(len) (((len) + 7) & ~7) |
b59f45d0 HX |
42 | #define MODULE_ALIAS_XFRM_MODE(family, encap) \ |
43 | MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap)) | |
d3d6dd3a MN |
44 | #define MODULE_ALIAS_XFRM_TYPE(family, proto) \ |
45 | MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto)) | |
ffdb5211 IT |
46 | #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \ |
47 | MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto)) | |
1da177e4 | 48 | |
558f82ef | 49 | #ifdef CONFIG_XFRM_STATISTICS |
59c9940e | 50 | #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field) |
558f82ef | 51 | #else |
59c9940e | 52 | #define XFRM_INC_STATS(net, field) ((void)(net)) |
558f82ef MN |
53 | #endif |
54 | ||
1da177e4 LT |
55 | |
56 | /* Organization of SPD aka "XFRM rules" | |
57 | ------------------------------------ | |
58 | ||
59 | Basic objects: | |
60 | - policy rule, struct xfrm_policy (=SPD entry) | |
61 | - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle) | |
62 | - instance of a transformer, struct xfrm_state (=SA) | |
63 | - template to clone xfrm_state, struct xfrm_tmpl | |
64 | ||
65 | SPD is plain linear list of xfrm_policy rules, ordered by priority. | |
66 | (To be compatible with existing pfkeyv2 implementations, | |
67 | many rules with priority of 0x7fffffff are allowed to exist and | |
68 | such rules are ordered in an unpredictable way, thanks to bsd folks.) | |
69 | ||
70 | Lookup is plain linear search until the first match with selector. | |
71 | ||
72 | If "action" is "block", then we prohibit the flow, otherwise: | |
73 | if "xfrms_nr" is zero, the flow passes untransformed. Otherwise, | |
74 | policy entry has list of up to XFRM_MAX_DEPTH transformations, | |
75 | described by templates xfrm_tmpl. Each template is resolved | |
76 | to a complete xfrm_state (see below) and we pack bundle of transformations | |
77 | to a dst_entry returned to requestor. | |
78 | ||
79 | dst -. xfrm .-> xfrm_state #1 | |
80 | |---. child .-> dst -. xfrm .-> xfrm_state #2 | |
81 | |---. child .-> dst -. xfrm .-> xfrm_state #3 | |
82 | |---. child .-> NULL | |
83 | ||
84 | Bundles are cached at xrfm_policy struct (field ->bundles). | |
85 | ||
86 | ||
87 | Resolution of xrfm_tmpl | |
88 | ----------------------- | |
89 | Template contains: | |
90 | 1. ->mode Mode: transport or tunnel | |
91 | 2. ->id.proto Protocol: AH/ESP/IPCOMP | |
92 | 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode. | |
93 | Q: allow to resolve security gateway? | |
94 | 4. ->id.spi If not zero, static SPI. | |
95 | 5. ->saddr Local tunnel endpoint, ignored for transport mode. | |
96 | 6. ->algos List of allowed algos. Plain bitmask now. | |
97 | Q: ealgos, aalgos, calgos. What a mess... | |
98 | 7. ->share Sharing mode. | |
99 | Q: how to implement private sharing mode? To add struct sock* to | |
100 | flow id? | |
101 | ||
102 | Having this template we search through SAD searching for entries | |
103 | with appropriate mode/proto/algo, permitted by selector. | |
104 | If no appropriate entry found, it is requested from key manager. | |
105 | ||
106 | PROBLEMS: | |
107 | Q: How to find all the bundles referring to a physical path for | |
108 | PMTU discovery? Seems, dst should contain list of all parents... | |
109 | and enter to infinite locking hierarchy disaster. | |
110 | No! It is easier, we will not search for them, let them find us. | |
111 | We add genid to each dst plus pointer to genid of raw IP route, | |
112 | pmtu disc will update pmtu on raw IP route and increase its genid. | |
113 | dst_check() will see this for top level and trigger resyncing | |
114 | metrics. Plus, it will be made via sk->sk_dst_cache. Solved. | |
115 | */ | |
116 | ||
12a169e7 HX |
117 | struct xfrm_state_walk { |
118 | struct list_head all; | |
119 | u8 state; | |
d3623099 ND |
120 | u8 dying; |
121 | u8 proto; | |
12a169e7 | 122 | u32 seq; |
870a2df4 | 123 | struct xfrm_address_filter *filter; |
12a169e7 HX |
124 | }; |
125 | ||
d77e38e6 SK |
126 | struct xfrm_state_offload { |
127 | struct net_device *dev; | |
128 | unsigned long offload_handle; | |
129 | unsigned int num_exthdrs; | |
130 | u8 flags; | |
131 | }; | |
132 | ||
1da177e4 | 133 | /* Full description of state of transformer. */ |
fd2c3ef7 | 134 | struct xfrm_state { |
0c5c9fb5 | 135 | possible_net_t xs_net; |
abb81c4f | 136 | union { |
12a169e7 | 137 | struct hlist_node gclist; |
abb81c4f HX |
138 | struct hlist_node bydst; |
139 | }; | |
8f126e37 DM |
140 | struct hlist_node bysrc; |
141 | struct hlist_node byspi; | |
1da177e4 | 142 | |
88755e9c | 143 | refcount_t refcnt; |
1da177e4 LT |
144 | spinlock_t lock; |
145 | ||
146 | struct xfrm_id id; | |
147 | struct xfrm_selector sel; | |
bf825f81 | 148 | struct xfrm_mark mark; |
35d2856b | 149 | u32 tfcpad; |
1da177e4 | 150 | |
9d4a706d DM |
151 | u32 genid; |
152 | ||
12a169e7 HX |
153 | /* Key manager bits */ |
154 | struct xfrm_state_walk km; | |
1da177e4 LT |
155 | |
156 | /* Parameters of this state. */ | |
157 | struct { | |
158 | u32 reqid; | |
159 | u8 mode; | |
160 | u8 replay_window; | |
161 | u8 aalgo, ealgo, calgo; | |
162 | u8 flags; | |
163 | u16 family; | |
164 | xfrm_address_t saddr; | |
165 | int header_len; | |
166 | int trailer_len; | |
a947b0a9 | 167 | u32 extra_flags; |
1da177e4 LT |
168 | } props; |
169 | ||
170 | struct xfrm_lifetime_cfg lft; | |
171 | ||
172 | /* Data for transformer */ | |
4447bb33 | 173 | struct xfrm_algo_auth *aalg; |
1da177e4 LT |
174 | struct xfrm_algo *ealg; |
175 | struct xfrm_algo *calg; | |
1a6509d9 | 176 | struct xfrm_algo_aead *aead; |
69b0137f | 177 | const char *geniv; |
1da177e4 LT |
178 | |
179 | /* Data for encapsulator */ | |
180 | struct xfrm_encap_tmpl *encap; | |
181 | ||
060f02a3 NT |
182 | /* Data for care-of address */ |
183 | xfrm_address_t *coaddr; | |
184 | ||
1da177e4 LT |
185 | /* IPComp needs an IPIP tunnel for handling uncompressed packets */ |
186 | struct xfrm_state *tunnel; | |
187 | ||
188 | /* If a tunnel, number of users + 1 */ | |
189 | atomic_t tunnel_users; | |
190 | ||
191 | /* State for replay detection */ | |
192 | struct xfrm_replay_state replay; | |
9736acf3 | 193 | struct xfrm_replay_state_esn *replay_esn; |
1da177e4 | 194 | |
f8cd5488 JHS |
195 | /* Replay detection state at the time we sent the last notification */ |
196 | struct xfrm_replay_state preplay; | |
9736acf3 | 197 | struct xfrm_replay_state_esn *preplay_esn; |
f8cd5488 | 198 | |
9fdc4883 | 199 | /* The functions for replay detection. */ |
e45a8a9e | 200 | const struct xfrm_replay *repl; |
9fdc4883 | 201 | |
2717096a JHS |
202 | /* internal flag that only holds state for delayed aevent at the |
203 | * moment | |
204 | */ | |
205 | u32 xflags; | |
206 | ||
f8cd5488 JHS |
207 | /* Replay detection notification settings */ |
208 | u32 replay_maxage; | |
209 | u32 replay_maxdiff; | |
210 | ||
211 | /* Replay detection notification timer */ | |
212 | struct timer_list rtimer; | |
213 | ||
1da177e4 LT |
214 | /* Statistics */ |
215 | struct xfrm_stats stats; | |
216 | ||
217 | struct xfrm_lifetime_cur curlft; | |
9e0d57fd | 218 | struct tasklet_hrtimer mtimer; |
1da177e4 | 219 | |
d77e38e6 SK |
220 | struct xfrm_state_offload xso; |
221 | ||
e3c0d047 FD |
222 | /* used to fix curlft->add_time when changing date */ |
223 | long saved_tmo; | |
224 | ||
9afaca05 | 225 | /* Last used time */ |
d26f3984 | 226 | unsigned long lastused; |
9afaca05 | 227 | |
cac2661c SK |
228 | struct page_frag xfrag; |
229 | ||
1da177e4 LT |
230 | /* Reference to data common to all the instances of this |
231 | * transformer. */ | |
533cb5b0 | 232 | const struct xfrm_type *type; |
13996378 | 233 | struct xfrm_mode *inner_mode; |
df9dcb45 | 234 | struct xfrm_mode *inner_mode_iaf; |
13996378 | 235 | struct xfrm_mode *outer_mode; |
1da177e4 | 236 | |
9d389d7f SK |
237 | const struct xfrm_type_offload *type_offload; |
238 | ||
df71837d TJ |
239 | /* Security context */ |
240 | struct xfrm_sec_ctx *security; | |
241 | ||
1da177e4 LT |
242 | /* Private data of this transformer, format is opaque, |
243 | * interpreted by xfrm_type methods. */ | |
244 | void *data; | |
245 | }; | |
246 | ||
673c09be AD |
247 | static inline struct net *xs_net(struct xfrm_state *x) |
248 | { | |
249 | return read_pnet(&x->xs_net); | |
250 | } | |
251 | ||
2717096a JHS |
252 | /* xflags - make enum if more show up */ |
253 | #define XFRM_TIME_DEFER 1 | |
e3c0d047 | 254 | #define XFRM_SOFT_EXPIRE 2 |
2717096a | 255 | |
1da177e4 LT |
256 | enum { |
257 | XFRM_STATE_VOID, | |
258 | XFRM_STATE_ACQ, | |
259 | XFRM_STATE_VALID, | |
260 | XFRM_STATE_ERROR, | |
261 | XFRM_STATE_EXPIRED, | |
262 | XFRM_STATE_DEAD | |
263 | }; | |
264 | ||
26b15dad | 265 | /* callback structure passed from either netlink or pfkey */ |
fd2c3ef7 | 266 | struct km_event { |
bf08867f HX |
267 | union { |
268 | u32 hard; | |
269 | u32 proto; | |
270 | u32 byid; | |
f8cd5488 | 271 | u32 aevent; |
f7b6983f | 272 | u32 type; |
bf08867f HX |
273 | } data; |
274 | ||
26b15dad | 275 | u32 seq; |
15e47304 | 276 | u32 portid; |
26b15dad | 277 | u32 event; |
7067802e | 278 | struct net *net; |
26b15dad JHS |
279 | }; |
280 | ||
9fdc4883 SK |
281 | struct xfrm_replay { |
282 | void (*advance)(struct xfrm_state *x, __be32 net_seq); | |
283 | int (*check)(struct xfrm_state *x, | |
284 | struct sk_buff *skb, | |
285 | __be32 net_seq); | |
3b59df46 SK |
286 | int (*recheck)(struct xfrm_state *x, |
287 | struct sk_buff *skb, | |
288 | __be32 net_seq); | |
9fdc4883 SK |
289 | void (*notify)(struct xfrm_state *x, int event); |
290 | int (*overflow)(struct xfrm_state *x, struct sk_buff *skb); | |
291 | }; | |
292 | ||
25ee3286 | 293 | struct net_device; |
1da177e4 LT |
294 | struct xfrm_type; |
295 | struct xfrm_dst; | |
296 | struct xfrm_policy_afinfo { | |
1da177e4 | 297 | struct dst_ops *dst_ops; |
42a7b32b DA |
298 | struct dst_entry *(*dst_lookup)(struct net *net, |
299 | int tos, int oif, | |
5e6b930f DM |
300 | const xfrm_address_t *saddr, |
301 | const xfrm_address_t *daddr); | |
42a7b32b DA |
302 | int (*get_saddr)(struct net *net, int oif, |
303 | xfrm_address_t *saddr, | |
304 | xfrm_address_t *daddr); | |
1da177e4 | 305 | void (*decode_session)(struct sk_buff *skb, |
d5422efe HX |
306 | struct flowi *fl, |
307 | int reverse); | |
05d84025 | 308 | int (*get_tos)(const struct flowi *fl); |
a1b05140 MN |
309 | int (*init_path)(struct xfrm_dst *path, |
310 | struct dst_entry *dst, | |
311 | int nfheader_len); | |
25ee3286 | 312 | int (*fill_dst)(struct xfrm_dst *xdst, |
87c1e12b | 313 | struct net_device *dev, |
0c7b3eef | 314 | const struct flowi *fl); |
2774c131 | 315 | struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig); |
1da177e4 LT |
316 | }; |
317 | ||
a2817d8b FW |
318 | int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family); |
319 | void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo); | |
d511337a JP |
320 | void km_policy_notify(struct xfrm_policy *xp, int dir, |
321 | const struct km_event *c); | |
ec30d78c | 322 | void xfrm_policy_cache_flush(void); |
d511337a | 323 | void km_state_notify(struct xfrm_state *x, const struct km_event *c); |
1da177e4 LT |
324 | |
325 | struct xfrm_tmpl; | |
d511337a JP |
326 | int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, |
327 | struct xfrm_policy *pol); | |
328 | void km_state_expired(struct xfrm_state *x, int hard, u32 portid); | |
329 | int __xfrm_state_delete(struct xfrm_state *x); | |
53bc6b4d | 330 | |
1da177e4 | 331 | struct xfrm_state_afinfo { |
9d389d7f SK |
332 | unsigned int family; |
333 | unsigned int proto; | |
334 | __be16 eth_proto; | |
335 | struct module *owner; | |
336 | const struct xfrm_type *type_map[IPPROTO_MAX]; | |
337 | const struct xfrm_type_offload *type_offload_map[IPPROTO_MAX]; | |
338 | struct xfrm_mode *mode_map[XFRM_MODE_MAX]; | |
339 | ||
d094cd83 | 340 | int (*init_flags)(struct xfrm_state *x); |
73e5ebb2 DM |
341 | void (*init_tempsel)(struct xfrm_selector *sel, |
342 | const struct flowi *fl); | |
19bd6244 DM |
343 | void (*init_temprop)(struct xfrm_state *x, |
344 | const struct xfrm_tmpl *tmpl, | |
345 | const xfrm_address_t *daddr, | |
346 | const xfrm_address_t *saddr); | |
41a49cc3 MN |
347 | int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n); |
348 | int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n); | |
ede2059d | 349 | int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 350 | int (*output_finish)(struct sock *sk, struct sk_buff *skb); |
227620e2 HX |
351 | int (*extract_input)(struct xfrm_state *x, |
352 | struct sk_buff *skb); | |
36cf9acf HX |
353 | int (*extract_output)(struct xfrm_state *x, |
354 | struct sk_buff *skb); | |
716062fd HX |
355 | int (*transport_finish)(struct sk_buff *skb, |
356 | int async); | |
628e341f | 357 | void (*local_error)(struct sk_buff *skb, u32 mtu); |
1da177e4 LT |
358 | }; |
359 | ||
d511337a JP |
360 | int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo); |
361 | int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo); | |
362 | struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); | |
711059b9 | 363 | struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family); |
1da177e4 | 364 | |
2f32b51b SK |
365 | struct xfrm_input_afinfo { |
366 | unsigned int family; | |
2f32b51b SK |
367 | int (*callback)(struct sk_buff *skb, u8 protocol, |
368 | int err); | |
369 | }; | |
370 | ||
960fdfde FW |
371 | int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo); |
372 | int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo); | |
2f32b51b | 373 | |
d511337a | 374 | void xfrm_state_delete_tunnel(struct xfrm_state *x); |
1da177e4 | 375 | |
fd2c3ef7 | 376 | struct xfrm_type { |
1da177e4 LT |
377 | char *description; |
378 | struct module *owner; | |
a6337463 | 379 | u8 proto; |
380 | u8 flags; | |
1b5c2299 | 381 | #define XFRM_TYPE_NON_FRAGMENT 1 |
436a0a40 | 382 | #define XFRM_TYPE_REPLAY_PROT 2 |
f04e7e8d HX |
383 | #define XFRM_TYPE_LOCAL_COADDR 4 |
384 | #define XFRM_TYPE_REMOTE_COADDR 8 | |
1da177e4 | 385 | |
72cb6962 | 386 | int (*init_state)(struct xfrm_state *x); |
1da177e4 | 387 | void (*destructor)(struct xfrm_state *); |
e695633e | 388 | int (*input)(struct xfrm_state *, struct sk_buff *skb); |
1da177e4 | 389 | int (*output)(struct xfrm_state *, struct sk_buff *pskb); |
8f029de2 DM |
390 | int (*reject)(struct xfrm_state *, struct sk_buff *, |
391 | const struct flowi *); | |
aee5adb4 | 392 | int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **); |
1da177e4 | 393 | /* Estimate maximal size of result of transformation of a dgram */ |
c5c25238 | 394 | u32 (*get_mtu)(struct xfrm_state *, int size); |
1da177e4 LT |
395 | }; |
396 | ||
d511337a JP |
397 | int xfrm_register_type(const struct xfrm_type *type, unsigned short family); |
398 | int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family); | |
1da177e4 | 399 | |
9d389d7f SK |
400 | struct xfrm_type_offload { |
401 | char *description; | |
402 | struct module *owner; | |
403 | u8 proto; | |
404 | void (*encap)(struct xfrm_state *, struct sk_buff *pskb); | |
405 | int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb); | |
406 | int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features); | |
407 | }; | |
408 | ||
409 | int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
410 | int xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family); | |
411 | ||
b59f45d0 | 412 | struct xfrm_mode { |
227620e2 HX |
413 | /* |
414 | * Remove encapsulation header. | |
415 | * | |
416 | * The IP header will be moved over the top of the encapsulation | |
417 | * header. | |
418 | * | |
419 | * On entry, the transport header shall point to where the IP header | |
420 | * should be and the network header shall be set to where the IP | |
421 | * header currently is. skb->data shall point to the start of the | |
422 | * payload. | |
423 | */ | |
424 | int (*input2)(struct xfrm_state *x, struct sk_buff *skb); | |
425 | ||
426 | /* | |
427 | * This is the actual input entry point. | |
428 | * | |
429 | * For transport mode and equivalent this would be identical to | |
430 | * input2 (which does not need to be set). While tunnel mode | |
431 | * and equivalent would set this to the tunnel encapsulation function | |
432 | * xfrm4_prepare_input that would in turn call input2. | |
433 | */ | |
b59f45d0 | 434 | int (*input)(struct xfrm_state *x, struct sk_buff *skb); |
37fedd3a HX |
435 | |
436 | /* | |
437 | * Add encapsulation header. | |
438 | * | |
439 | * On exit, the transport header will be set to the start of the | |
440 | * encapsulation header to be filled in by x->type->output and | |
441 | * the mac header will be set to the nextheader (protocol for | |
442 | * IPv4) field of the extension header directly preceding the | |
443 | * encapsulation header, or in its absence, that of the top IP | |
444 | * header. The value of the network header will always point | |
445 | * to the top IP header while skb->data will point to the payload. | |
446 | */ | |
36cf9acf HX |
447 | int (*output2)(struct xfrm_state *x,struct sk_buff *skb); |
448 | ||
449 | /* | |
450 | * This is the actual output entry point. | |
451 | * | |
452 | * For transport mode and equivalent this would be identical to | |
453 | * output2 (which does not need to be set). While tunnel mode | |
454 | * and equivalent would set this to a tunnel encapsulation function | |
455 | * (xfrm4_prepare_output or xfrm6_prepare_output) that would in turn | |
456 | * call output2. | |
457 | */ | |
458 | int (*output)(struct xfrm_state *x, struct sk_buff *skb); | |
b59f45d0 | 459 | |
c35fe410 SK |
460 | /* |
461 | * Adjust pointers into the packet and do GSO segmentation. | |
462 | */ | |
463 | struct sk_buff *(*gso_segment)(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features); | |
464 | ||
465 | /* | |
466 | * Adjust pointers into the packet when IPsec is done at layer2. | |
467 | */ | |
468 | void (*xmit)(struct xfrm_state *x, struct sk_buff *skb); | |
469 | ||
17c2a42a | 470 | struct xfrm_state_afinfo *afinfo; |
b59f45d0 HX |
471 | struct module *owner; |
472 | unsigned int encap; | |
1bfcb10f HX |
473 | int flags; |
474 | }; | |
475 | ||
476 | /* Flags for xfrm_mode. */ | |
477 | enum { | |
478 | XFRM_MODE_FLAG_TUNNEL = 1, | |
b59f45d0 HX |
479 | }; |
480 | ||
d511337a JP |
481 | int xfrm_register_mode(struct xfrm_mode *mode, int family); |
482 | int xfrm_unregister_mode(struct xfrm_mode *mode, int family); | |
b59f45d0 | 483 | |
df9dcb45 KM |
484 | static inline int xfrm_af2proto(unsigned int family) |
485 | { | |
486 | switch(family) { | |
487 | case AF_INET: | |
488 | return IPPROTO_IPIP; | |
489 | case AF_INET6: | |
490 | return IPPROTO_IPV6; | |
491 | default: | |
492 | return 0; | |
493 | } | |
494 | } | |
495 | ||
496 | static inline struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto) | |
497 | { | |
498 | if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) || | |
499 | (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6)) | |
500 | return x->inner_mode; | |
501 | else | |
502 | return x->inner_mode_iaf; | |
503 | } | |
504 | ||
fd2c3ef7 | 505 | struct xfrm_tmpl { |
1da177e4 LT |
506 | /* id in template is interpreted as: |
507 | * daddr - destination of tunnel, may be zero for transport mode. | |
508 | * spi - zero to acquire spi. Not zero if spi is static, then | |
509 | * daddr must be fixed too. | |
510 | * proto - AH/ESP/IPCOMP | |
511 | */ | |
512 | struct xfrm_id id; | |
513 | ||
514 | /* Source address of tunnel. Ignored, if it is not a tunnel. */ | |
515 | xfrm_address_t saddr; | |
516 | ||
76b3f055 MK |
517 | unsigned short encap_family; |
518 | ||
a6337463 | 519 | u32 reqid; |
1da177e4 | 520 | |
7e49e6de | 521 | /* Mode: transport, tunnel etc. */ |
a6337463 | 522 | u8 mode; |
1da177e4 LT |
523 | |
524 | /* Sharing mode: unique, this session only, this user only etc. */ | |
a6337463 | 525 | u8 share; |
1da177e4 LT |
526 | |
527 | /* May skip this transfomration if no SA is found */ | |
a6337463 | 528 | u8 optional; |
1da177e4 | 529 | |
c5d18e98 | 530 | /* Skip aalgos/ealgos/calgos checks. */ |
a6337463 | 531 | u8 allalgs; |
c5d18e98 | 532 | |
1da177e4 | 533 | /* Bit mask of algos allowed for acquisition */ |
a6337463 | 534 | u32 aalgos; |
535 | u32 ealgos; | |
536 | u32 calgos; | |
1da177e4 LT |
537 | }; |
538 | ||
622dc828 | 539 | #define XFRM_MAX_DEPTH 6 |
54ef207a | 540 | #define XFRM_MAX_OFFLOAD_DEPTH 1 |
1da177e4 | 541 | |
12a169e7 HX |
542 | struct xfrm_policy_walk_entry { |
543 | struct list_head all; | |
544 | u8 dead; | |
545 | }; | |
546 | ||
547 | struct xfrm_policy_walk { | |
548 | struct xfrm_policy_walk_entry walk; | |
549 | u8 type; | |
550 | u32 seq; | |
551 | }; | |
552 | ||
a0073fe1 SK |
553 | struct xfrm_policy_queue { |
554 | struct sk_buff_head hold_queue; | |
555 | struct timer_list hold_timer; | |
556 | unsigned long timeout; | |
557 | }; | |
558 | ||
fd2c3ef7 | 559 | struct xfrm_policy { |
0c5c9fb5 | 560 | possible_net_t xp_net; |
2518c7c2 DM |
561 | struct hlist_node bydst; |
562 | struct hlist_node byidx; | |
1da177e4 LT |
563 | |
564 | /* This lock only affects elements except for entry. */ | |
565 | rwlock_t lock; | |
850a6212 | 566 | refcount_t refcnt; |
1da177e4 LT |
567 | struct timer_list timer; |
568 | ||
80c802f3 | 569 | atomic_t genid; |
1da177e4 LT |
570 | u32 priority; |
571 | u32 index; | |
bf825f81 | 572 | struct xfrm_mark mark; |
1da177e4 LT |
573 | struct xfrm_selector selector; |
574 | struct xfrm_lifetime_cfg lft; | |
575 | struct xfrm_lifetime_cur curlft; | |
12a169e7 | 576 | struct xfrm_policy_walk_entry walk; |
a0073fe1 | 577 | struct xfrm_policy_queue polq; |
46ca5f5d ACM |
578 | u8 type; |
579 | u8 action; | |
580 | u8 flags; | |
46ca5f5d | 581 | u8 xfrm_nr; |
12a169e7 | 582 | u16 family; |
df71837d | 583 | struct xfrm_sec_ctx *security; |
1da177e4 | 584 | struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH]; |
56f04730 | 585 | struct rcu_head rcu; |
1da177e4 LT |
586 | }; |
587 | ||
63eb23f5 | 588 | static inline struct net *xp_net(const struct xfrm_policy *xp) |
0331b1f3 AD |
589 | { |
590 | return read_pnet(&xp->xp_net); | |
591 | } | |
592 | ||
13c1d189 AE |
593 | struct xfrm_kmaddress { |
594 | xfrm_address_t local; | |
595 | xfrm_address_t remote; | |
596 | u32 reserved; | |
597 | u16 family; | |
598 | }; | |
599 | ||
80c9abaa SS |
600 | struct xfrm_migrate { |
601 | xfrm_address_t old_daddr; | |
602 | xfrm_address_t old_saddr; | |
603 | xfrm_address_t new_daddr; | |
604 | xfrm_address_t new_saddr; | |
605 | u8 proto; | |
606 | u8 mode; | |
607 | u16 reserved; | |
608 | u32 reqid; | |
609 | u16 old_family; | |
610 | u16 new_family; | |
611 | }; | |
612 | ||
f8cd5488 | 613 | #define XFRM_KM_TIMEOUT 30 |
f8cd5488 JHS |
614 | /* what happened */ |
615 | #define XFRM_REPLAY_UPDATE XFRM_AE_CR | |
616 | #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE | |
617 | ||
618 | /* default aevent timeout in units of 100ms */ | |
619 | #define XFRM_AE_ETIME 10 | |
620 | /* Async Event timer multiplier */ | |
621 | #define XFRM_AE_ETH_M 10 | |
622 | /* default seq threshold size */ | |
623 | #define XFRM_AE_SEQT_SIZE 2 | |
1da177e4 | 624 | |
fd2c3ef7 | 625 | struct xfrm_mgr { |
1da177e4 | 626 | struct list_head list; |
214e005b | 627 | int (*notify)(struct xfrm_state *x, const struct km_event *c); |
65e0736b | 628 | int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp); |
cb969f07 | 629 | struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir); |
5d36b180 | 630 | int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
214e005b | 631 | int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c); |
db983c11 | 632 | int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr); |
183cad12 DM |
633 | int (*migrate)(const struct xfrm_selector *sel, |
634 | u8 dir, u8 type, | |
635 | const struct xfrm_migrate *m, | |
636 | int num_bundles, | |
8bafd730 AA |
637 | const struct xfrm_kmaddress *k, |
638 | const struct xfrm_encap_tmpl *encap); | |
0f24558e | 639 | bool (*is_alive)(const struct km_event *c); |
1da177e4 LT |
640 | }; |
641 | ||
d511337a JP |
642 | int xfrm_register_km(struct xfrm_mgr *km); |
643 | int xfrm_unregister_km(struct xfrm_mgr *km); | |
1da177e4 | 644 | |
70be6c91 SK |
645 | struct xfrm_tunnel_skb_cb { |
646 | union { | |
647 | struct inet_skb_parm h4; | |
648 | struct inet6_skb_parm h6; | |
649 | } header; | |
650 | ||
651 | union { | |
652 | struct ip_tunnel *ip4; | |
653 | struct ip6_tnl *ip6; | |
654 | } tunnel; | |
655 | }; | |
656 | ||
657 | #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0])) | |
658 | ||
436a0a40 HX |
659 | /* |
660 | * This structure is used for the duration where packets are being | |
661 | * transformed by IPsec. As soon as the packet leaves IPsec the | |
662 | * area beyond the generic IP part may be overwritten. | |
663 | */ | |
664 | struct xfrm_skb_cb { | |
70be6c91 | 665 | struct xfrm_tunnel_skb_cb header; |
436a0a40 HX |
666 | |
667 | /* Sequence number for replay protection. */ | |
b318e0e4 | 668 | union { |
1ce3644a SK |
669 | struct { |
670 | __u32 low; | |
671 | __u32 hi; | |
672 | } output; | |
673 | struct { | |
674 | __be32 low; | |
675 | __be32 hi; | |
676 | } input; | |
b318e0e4 | 677 | } seq; |
436a0a40 HX |
678 | }; |
679 | ||
680 | #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0])) | |
681 | ||
36cf9acf HX |
682 | /* |
683 | * This structure is used by the afinfo prepare_input/prepare_output functions | |
684 | * to transmit header information to the mode input/output functions. | |
685 | */ | |
686 | struct xfrm_mode_skb_cb { | |
70be6c91 | 687 | struct xfrm_tunnel_skb_cb header; |
36cf9acf HX |
688 | |
689 | /* Copied from header for IPv4, always set to zero and DF for IPv6. */ | |
690 | __be16 id; | |
691 | __be16 frag_off; | |
692 | ||
732c8bd5 HX |
693 | /* IP header length (excluding options or extension headers). */ |
694 | u8 ihl; | |
695 | ||
36cf9acf HX |
696 | /* TOS for IPv4, class for IPv6. */ |
697 | u8 tos; | |
698 | ||
699 | /* TTL for IPv4, hop limitfor IPv6. */ | |
700 | u8 ttl; | |
701 | ||
702 | /* Protocol for IPv4, NH for IPv6. */ | |
703 | u8 protocol; | |
704 | ||
732c8bd5 HX |
705 | /* Option length for IPv4, zero for IPv6. */ |
706 | u8 optlen; | |
707 | ||
36cf9acf HX |
708 | /* Used by IPv6 only, zero for IPv4. */ |
709 | u8 flow_lbl[3]; | |
710 | }; | |
711 | ||
712 | #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0])) | |
713 | ||
716062fd HX |
714 | /* |
715 | * This structure is used by the input processing to locate the SPI and | |
716 | * related information. | |
717 | */ | |
718 | struct xfrm_spi_skb_cb { | |
70be6c91 | 719 | struct xfrm_tunnel_skb_cb header; |
716062fd | 720 | |
716062fd | 721 | unsigned int daddroff; |
2fcb45b6 | 722 | unsigned int family; |
7785bba2 | 723 | __be32 seq; |
716062fd HX |
724 | }; |
725 | ||
726 | #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0])) | |
727 | ||
c9204d9c | 728 | #ifdef CONFIG_AUDITSYSCALL |
afeb14b4 | 729 | static inline struct audit_buffer *xfrm_audit_start(const char *op) |
ab5f5e8b JL |
730 | { |
731 | struct audit_buffer *audit_buf = NULL; | |
ab5f5e8b | 732 | |
afeb14b4 PM |
733 | if (audit_enabled == 0) |
734 | return NULL; | |
ab5f5e8b | 735 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, |
afeb14b4 | 736 | AUDIT_MAC_IPSEC_EVENT); |
ab5f5e8b JL |
737 | if (audit_buf == NULL) |
738 | return NULL; | |
afeb14b4 PM |
739 | audit_log_format(audit_buf, "op=%s", op); |
740 | return audit_buf; | |
741 | } | |
ab5f5e8b | 742 | |
2e71029e | 743 | static inline void xfrm_audit_helper_usrinfo(bool task_valid, |
afeb14b4 PM |
744 | struct audit_buffer *audit_buf) |
745 | { | |
2e71029e TH |
746 | const unsigned int auid = from_kuid(&init_user_ns, task_valid ? |
747 | audit_get_loginuid(current) : | |
748 | INVALID_UID); | |
749 | const unsigned int ses = task_valid ? audit_get_sessionid(current) : | |
750 | (unsigned int) -1; | |
751 | ||
752 | audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses); | |
f1370cc4 | 753 | audit_log_task_context(audit_buf); |
ab5f5e8b JL |
754 | } |
755 | ||
2e71029e TH |
756 | void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid); |
757 | void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
758 | bool task_valid); | |
759 | void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid); | |
760 | void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid); | |
d511337a JP |
761 | void xfrm_audit_state_replay_overflow(struct xfrm_state *x, |
762 | struct sk_buff *skb); | |
763 | void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, | |
764 | __be32 net_seq); | |
765 | void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family); | |
766 | void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, | |
767 | __be32 net_seq); | |
768 | void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, | |
769 | u8 proto); | |
c9204d9c | 770 | #else |
41fef0ee MS |
771 | |
772 | static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, | |
2e71029e | 773 | bool task_valid) |
41fef0ee MS |
774 | { |
775 | } | |
776 | ||
777 | static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result, | |
2e71029e | 778 | bool task_valid) |
41fef0ee MS |
779 | { |
780 | } | |
781 | ||
782 | static inline void xfrm_audit_state_add(struct xfrm_state *x, int result, | |
2e71029e | 783 | bool task_valid) |
41fef0ee MS |
784 | { |
785 | } | |
786 | ||
787 | static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result, | |
2e71029e | 788 | bool task_valid) |
41fef0ee MS |
789 | { |
790 | } | |
791 | ||
792 | static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x, | |
793 | struct sk_buff *skb) | |
794 | { | |
795 | } | |
796 | ||
9fdc4883 SK |
797 | static inline void xfrm_audit_state_replay(struct xfrm_state *x, |
798 | struct sk_buff *skb, __be32 net_seq) | |
799 | { | |
800 | } | |
801 | ||
41fef0ee MS |
802 | static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb, |
803 | u16 family) | |
804 | { | |
805 | } | |
806 | ||
807 | static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, | |
808 | __be32 net_spi, __be32 net_seq) | |
809 | { | |
810 | } | |
811 | ||
812 | static inline void xfrm_audit_state_icvfail(struct xfrm_state *x, | |
813 | struct sk_buff *skb, u8 proto) | |
814 | { | |
815 | } | |
c9204d9c | 816 | #endif /* CONFIG_AUDITSYSCALL */ |
161a09e7 | 817 | |
1da177e4 LT |
818 | static inline void xfrm_pol_hold(struct xfrm_policy *policy) |
819 | { | |
820 | if (likely(policy != NULL)) | |
850a6212 | 821 | refcount_inc(&policy->refcnt); |
1da177e4 LT |
822 | } |
823 | ||
d511337a | 824 | void xfrm_policy_destroy(struct xfrm_policy *policy); |
1da177e4 LT |
825 | |
826 | static inline void xfrm_pol_put(struct xfrm_policy *policy) | |
827 | { | |
850a6212 | 828 | if (refcount_dec_and_test(&policy->refcnt)) |
64c31b3f | 829 | xfrm_policy_destroy(policy); |
1da177e4 LT |
830 | } |
831 | ||
4e81bb83 MN |
832 | static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols) |
833 | { | |
834 | int i; | |
835 | for (i = npols - 1; i >= 0; --i) | |
836 | xfrm_pol_put(pols[i]); | |
837 | } | |
4e81bb83 | 838 | |
d511337a | 839 | void __xfrm_state_destroy(struct xfrm_state *); |
1da177e4 | 840 | |
21380b81 HX |
841 | static inline void __xfrm_state_put(struct xfrm_state *x) |
842 | { | |
88755e9c | 843 | refcount_dec(&x->refcnt); |
21380b81 HX |
844 | } |
845 | ||
1da177e4 LT |
846 | static inline void xfrm_state_put(struct xfrm_state *x) |
847 | { | |
88755e9c | 848 | if (refcount_dec_and_test(&x->refcnt)) |
1da177e4 LT |
849 | __xfrm_state_destroy(x); |
850 | } | |
851 | ||
852 | static inline void xfrm_state_hold(struct xfrm_state *x) | |
853 | { | |
88755e9c | 854 | refcount_inc(&x->refcnt); |
1da177e4 LT |
855 | } |
856 | ||
1744a8fe | 857 | static inline bool addr_match(const void *token1, const void *token2, |
e1b0048e | 858 | unsigned int prefixlen) |
1da177e4 | 859 | { |
1744a8fe DM |
860 | const __be32 *a1 = token1; |
861 | const __be32 *a2 = token2; | |
e1b0048e AD |
862 | unsigned int pdw; |
863 | unsigned int pbi; | |
1da177e4 | 864 | |
a6337463 | 865 | pdw = prefixlen >> 5; /* num of whole u32 in prefix */ |
1da177e4 LT |
866 | pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */ |
867 | ||
868 | if (pdw) | |
869 | if (memcmp(a1, a2, pdw << 2)) | |
1744a8fe | 870 | return false; |
1da177e4 LT |
871 | |
872 | if (pbi) { | |
5f19343f | 873 | __be32 mask; |
1da177e4 LT |
874 | |
875 | mask = htonl((0xffffffff) << (32 - pbi)); | |
876 | ||
877 | if ((a1[pdw] ^ a2[pdw]) & mask) | |
1744a8fe | 878 | return false; |
1da177e4 LT |
879 | } |
880 | ||
1744a8fe | 881 | return true; |
1da177e4 LT |
882 | } |
883 | ||
26bff940 AD |
884 | static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen) |
885 | { | |
886 | /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */ | |
6c786bcb | 887 | if (sizeof(long) == 4 && prefixlen == 0) |
26bff940 | 888 | return true; |
6c786bcb | 889 | return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen))); |
26bff940 AD |
890 | } |
891 | ||
1da177e4 | 892 | static __inline__ |
6281dcc9 | 893 | __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 894 | { |
f9d07e41 | 895 | __be16 port; |
1d28f42c | 896 | switch(fl->flowi_proto) { |
1da177e4 LT |
897 | case IPPROTO_TCP: |
898 | case IPPROTO_UDP: | |
ba4e58ec | 899 | case IPPROTO_UDPLITE: |
1da177e4 | 900 | case IPPROTO_SCTP: |
6281dcc9 | 901 | port = uli->ports.sport; |
1da177e4 LT |
902 | break; |
903 | case IPPROTO_ICMP: | |
904 | case IPPROTO_ICMPV6: | |
6281dcc9 | 905 | port = htons(uli->icmpt.type); |
1da177e4 | 906 | break; |
2ce4272a | 907 | case IPPROTO_MH: |
6281dcc9 | 908 | port = htons(uli->mht.type); |
2ce4272a | 909 | break; |
cc9ff19d | 910 | case IPPROTO_GRE: |
6281dcc9 | 911 | port = htons(ntohl(uli->gre_key) >> 16); |
cc9ff19d | 912 | break; |
1da177e4 LT |
913 | default: |
914 | port = 0; /*XXX*/ | |
915 | } | |
916 | return port; | |
917 | } | |
918 | ||
919 | static __inline__ | |
6281dcc9 | 920 | __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli) |
1da177e4 | 921 | { |
f9d07e41 | 922 | __be16 port; |
1d28f42c | 923 | switch(fl->flowi_proto) { |
1da177e4 LT |
924 | case IPPROTO_TCP: |
925 | case IPPROTO_UDP: | |
ba4e58ec | 926 | case IPPROTO_UDPLITE: |
1da177e4 | 927 | case IPPROTO_SCTP: |
6281dcc9 | 928 | port = uli->ports.dport; |
1da177e4 LT |
929 | break; |
930 | case IPPROTO_ICMP: | |
931 | case IPPROTO_ICMPV6: | |
6281dcc9 | 932 | port = htons(uli->icmpt.code); |
1da177e4 | 933 | break; |
cc9ff19d | 934 | case IPPROTO_GRE: |
6281dcc9 | 935 | port = htons(ntohl(uli->gre_key) & 0xffff); |
cc9ff19d | 936 | break; |
1da177e4 LT |
937 | default: |
938 | port = 0; /*XXX*/ | |
939 | } | |
940 | return port; | |
941 | } | |
942 | ||
d511337a JP |
943 | bool xfrm_selector_match(const struct xfrm_selector *sel, |
944 | const struct flowi *fl, unsigned short family); | |
1da177e4 | 945 | |
df71837d TJ |
946 | #ifdef CONFIG_SECURITY_NETWORK_XFRM |
947 | /* If neither has a context --> match | |
948 | * Otherwise, both must have a context and the sids, doi, alg must match | |
949 | */ | |
bc9b35ad | 950 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d TJ |
951 | { |
952 | return ((!s1 && !s2) || | |
953 | (s1 && s2 && | |
954 | (s1->ctx_sid == s2->ctx_sid) && | |
955 | (s1->ctx_doi == s2->ctx_doi) && | |
956 | (s1->ctx_alg == s2->ctx_alg))); | |
957 | } | |
958 | #else | |
bc9b35ad | 959 | static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2) |
df71837d | 960 | { |
bc9b35ad | 961 | return true; |
df71837d TJ |
962 | } |
963 | #endif | |
964 | ||
1da177e4 LT |
965 | /* A struct encoding bundle of transformations to apply to some set of flow. |
966 | * | |
967 | * dst->child points to the next element of bundle. | |
968 | * dst->xfrm points to an instanse of transformer. | |
969 | * | |
970 | * Due to unfortunate limitations of current routing cache, which we | |
971 | * have no time to fix, it mirrors struct rtable and bound to the same | |
972 | * routing key, including saddr,daddr. However, we can have many of | |
973 | * bundles differing by session id. All the bundles grow from a parent | |
974 | * policy rule. | |
975 | */ | |
fd2c3ef7 | 976 | struct xfrm_dst { |
1da177e4 | 977 | union { |
1da177e4 LT |
978 | struct dst_entry dst; |
979 | struct rtable rt; | |
980 | struct rt6_info rt6; | |
981 | } u; | |
982 | struct dst_entry *route; | |
80c802f3 TT |
983 | struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; |
984 | int num_pols, num_xfrms; | |
80c802f3 TT |
985 | u32 xfrm_genid; |
986 | u32 policy_genid; | |
1da177e4 LT |
987 | u32 route_mtu_cached; |
988 | u32 child_mtu_cached; | |
92d63dec HY |
989 | u32 route_cookie; |
990 | u32 path_cookie; | |
1da177e4 LT |
991 | }; |
992 | ||
def8b4fa | 993 | #ifdef CONFIG_XFRM |
aabc9761 HX |
994 | static inline void xfrm_dst_destroy(struct xfrm_dst *xdst) |
995 | { | |
80c802f3 | 996 | xfrm_pols_put(xdst->pols, xdst->num_pols); |
aabc9761 HX |
997 | dst_release(xdst->route); |
998 | if (likely(xdst->u.dst.xfrm)) | |
999 | xfrm_state_put(xdst->u.dst.xfrm); | |
1000 | } | |
def8b4fa | 1001 | #endif |
aabc9761 | 1002 | |
d511337a | 1003 | void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev); |
aabc9761 | 1004 | |
54ef207a SK |
1005 | struct xfrm_offload { |
1006 | /* Output sequence number for replay protection on offloading. */ | |
1007 | struct { | |
1008 | __u32 low; | |
1009 | __u32 hi; | |
1010 | } seq; | |
1011 | ||
1012 | __u32 flags; | |
1013 | #define SA_DELETE_REQ 1 | |
1014 | #define CRYPTO_DONE 2 | |
1015 | #define CRYPTO_NEXT_DONE 4 | |
1016 | #define CRYPTO_FALLBACK 8 | |
1017 | #define XFRM_GSO_SEGMENT 16 | |
1018 | #define XFRM_GRO 32 | |
1019 | ||
1020 | __u32 status; | |
1021 | #define CRYPTO_SUCCESS 1 | |
1022 | #define CRYPTO_GENERIC_ERROR 2 | |
1023 | #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4 | |
1024 | #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8 | |
1025 | #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16 | |
1026 | #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32 | |
1027 | #define CRYPTO_INVALID_PACKET_SYNTAX 64 | |
1028 | #define CRYPTO_INVALID_PROTOCOL 128 | |
1029 | ||
1030 | __u8 proto; | |
1031 | }; | |
1032 | ||
fd2c3ef7 | 1033 | struct sec_path { |
55eabed6 | 1034 | refcount_t refcnt; |
1da177e4 | 1035 | int len; |
54ef207a SK |
1036 | int olen; |
1037 | ||
dbe5b4aa | 1038 | struct xfrm_state *xvec[XFRM_MAX_DEPTH]; |
54ef207a | 1039 | struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH]; |
1da177e4 LT |
1040 | }; |
1041 | ||
990078af MS |
1042 | static inline int secpath_exists(struct sk_buff *skb) |
1043 | { | |
1044 | #ifdef CONFIG_XFRM | |
1045 | return skb->sp != NULL; | |
1046 | #else | |
1047 | return 0; | |
1048 | #endif | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | static inline struct sec_path * |
1052 | secpath_get(struct sec_path *sp) | |
1053 | { | |
1054 | if (sp) | |
55eabed6 | 1055 | refcount_inc(&sp->refcnt); |
1da177e4 LT |
1056 | return sp; |
1057 | } | |
1058 | ||
d511337a | 1059 | void __secpath_destroy(struct sec_path *sp); |
1da177e4 LT |
1060 | |
1061 | static inline void | |
1062 | secpath_put(struct sec_path *sp) | |
1063 | { | |
55eabed6 | 1064 | if (sp && refcount_dec_and_test(&sp->refcnt)) |
1da177e4 LT |
1065 | __secpath_destroy(sp); |
1066 | } | |
1067 | ||
d511337a | 1068 | struct sec_path *secpath_dup(struct sec_path *src); |
b0fcee82 | 1069 | int secpath_set(struct sk_buff *skb); |
1da177e4 LT |
1070 | |
1071 | static inline void | |
1072 | secpath_reset(struct sk_buff *skb) | |
1073 | { | |
1074 | #ifdef CONFIG_XFRM | |
1075 | secpath_put(skb->sp); | |
1076 | skb->sp = NULL; | |
1077 | #endif | |
1078 | } | |
1079 | ||
a1e59abf | 1080 | static inline int |
6cc32961 | 1081 | xfrm_addr_any(const xfrm_address_t *addr, unsigned short family) |
a1e59abf PM |
1082 | { |
1083 | switch (family) { | |
1084 | case AF_INET: | |
1085 | return addr->a4 == 0; | |
1086 | case AF_INET6: | |
15e318bd | 1087 | return ipv6_addr_any(&addr->in6); |
a1e59abf PM |
1088 | } |
1089 | return 0; | |
1090 | } | |
1091 | ||
1da177e4 | 1092 | static inline int |
21eddb5c | 1093 | __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1094 | { |
1095 | return (tmpl->saddr.a4 && | |
1096 | tmpl->saddr.a4 != x->props.saddr.a4); | |
1097 | } | |
1098 | ||
1099 | static inline int | |
21eddb5c | 1100 | __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x) |
1da177e4 LT |
1101 | { |
1102 | return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) && | |
ff88b30c | 1103 | !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr)); |
1da177e4 LT |
1104 | } |
1105 | ||
1106 | static inline int | |
21eddb5c | 1107 | xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family) |
1da177e4 LT |
1108 | { |
1109 | switch (family) { | |
1110 | case AF_INET: | |
1111 | return __xfrm4_state_addr_cmp(tmpl, x); | |
1112 | case AF_INET6: | |
1113 | return __xfrm6_state_addr_cmp(tmpl, x); | |
1114 | } | |
1115 | return !0; | |
1116 | } | |
1117 | ||
1118 | #ifdef CONFIG_XFRM | |
d511337a JP |
1119 | int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb, |
1120 | unsigned short family); | |
1da177e4 | 1121 | |
d5422efe HX |
1122 | static inline int __xfrm_policy_check2(struct sock *sk, int dir, |
1123 | struct sk_buff *skb, | |
1124 | unsigned int family, int reverse) | |
1da177e4 | 1125 | { |
f6e1e25d | 1126 | struct net *net = dev_net(skb->dev); |
d5422efe HX |
1127 | int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0); |
1128 | ||
1da177e4 | 1129 | if (sk && sk->sk_policy[XFRM_POLICY_IN]) |
d5422efe | 1130 | return __xfrm_policy_check(sk, ndir, skb, family); |
4e81bb83 | 1131 | |
f6e1e25d | 1132 | return (!net->xfrm.policy_count[dir] && !skb->sp) || |
adf30907 | 1133 | (skb_dst(skb)->flags & DST_NOPOLICY) || |
d5422efe HX |
1134 | __xfrm_policy_check(sk, ndir, skb, family); |
1135 | } | |
1136 | ||
1137 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1138 | { | |
1139 | return __xfrm_policy_check2(sk, dir, skb, family, 0); | |
1da177e4 LT |
1140 | } |
1141 | ||
1142 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1143 | { | |
1144 | return xfrm_policy_check(sk, dir, skb, AF_INET); | |
1145 | } | |
1146 | ||
1147 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1148 | { | |
1149 | return xfrm_policy_check(sk, dir, skb, AF_INET6); | |
1150 | } | |
1151 | ||
d5422efe HX |
1152 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, |
1153 | struct sk_buff *skb) | |
1154 | { | |
1155 | return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1); | |
1156 | } | |
1157 | ||
1158 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1159 | struct sk_buff *skb) | |
1160 | { | |
1161 | return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1); | |
1162 | } | |
1163 | ||
d511337a JP |
1164 | int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, |
1165 | unsigned int family, int reverse); | |
d5422efe HX |
1166 | |
1167 | static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl, | |
1168 | unsigned int family) | |
1169 | { | |
1170 | return __xfrm_decode_session(skb, fl, family, 0); | |
1171 | } | |
1172 | ||
1173 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, | |
1174 | struct flowi *fl, | |
1175 | unsigned int family) | |
1176 | { | |
1177 | return __xfrm_decode_session(skb, fl, family, 1); | |
1178 | } | |
1179 | ||
d511337a | 1180 | int __xfrm_route_forward(struct sk_buff *skb, unsigned short family); |
1da177e4 LT |
1181 | |
1182 | static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family) | |
1183 | { | |
99a66657 AD |
1184 | struct net *net = dev_net(skb->dev); |
1185 | ||
1186 | return !net->xfrm.policy_count[XFRM_POLICY_OUT] || | |
adf30907 | 1187 | (skb_dst(skb)->flags & DST_NOXFRM) || |
1da177e4 LT |
1188 | __xfrm_route_forward(skb, family); |
1189 | } | |
1190 | ||
1191 | static inline int xfrm4_route_forward(struct sk_buff *skb) | |
1192 | { | |
1193 | return xfrm_route_forward(skb, AF_INET); | |
1194 | } | |
1195 | ||
1196 | static inline int xfrm6_route_forward(struct sk_buff *skb) | |
1197 | { | |
1198 | return xfrm_route_forward(skb, AF_INET6); | |
1199 | } | |
1200 | ||
d188ba86 | 1201 | int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk); |
1da177e4 | 1202 | |
d188ba86 | 1203 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) |
1da177e4 | 1204 | { |
d188ba86 ED |
1205 | sk->sk_policy[0] = NULL; |
1206 | sk->sk_policy[1] = NULL; | |
1207 | if (unlikely(osk->sk_policy[0] || osk->sk_policy[1])) | |
1208 | return __xfrm_sk_clone_policy(sk, osk); | |
1da177e4 LT |
1209 | return 0; |
1210 | } | |
1211 | ||
d511337a | 1212 | int xfrm_policy_delete(struct xfrm_policy *pol, int dir); |
1da177e4 LT |
1213 | |
1214 | static inline void xfrm_sk_free_policy(struct sock *sk) | |
1215 | { | |
d188ba86 ED |
1216 | struct xfrm_policy *pol; |
1217 | ||
1218 | pol = rcu_dereference_protected(sk->sk_policy[0], 1); | |
1219 | if (unlikely(pol != NULL)) { | |
1220 | xfrm_policy_delete(pol, XFRM_POLICY_MAX); | |
1da177e4 LT |
1221 | sk->sk_policy[0] = NULL; |
1222 | } | |
d188ba86 ED |
1223 | pol = rcu_dereference_protected(sk->sk_policy[1], 1); |
1224 | if (unlikely(pol != NULL)) { | |
1225 | xfrm_policy_delete(pol, XFRM_POLICY_MAX+1); | |
1da177e4 LT |
1226 | sk->sk_policy[1] = NULL; |
1227 | } | |
1228 | } | |
1229 | ||
1230 | #else | |
1231 | ||
1232 | static inline void xfrm_sk_free_policy(struct sock *sk) {} | |
d188ba86 | 1233 | static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; } |
1da177e4 LT |
1234 | static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; } |
1235 | static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; } | |
1236 | static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1237 | { | |
1238 | return 1; | |
1239 | } | |
1240 | static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb) | |
1241 | { | |
1242 | return 1; | |
1243 | } | |
1244 | static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family) | |
1245 | { | |
1246 | return 1; | |
1247 | } | |
d5422efe HX |
1248 | static inline int xfrm_decode_session_reverse(struct sk_buff *skb, |
1249 | struct flowi *fl, | |
1250 | unsigned int family) | |
1251 | { | |
1252 | return -ENOSYS; | |
1253 | } | |
1254 | static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir, | |
1255 | struct sk_buff *skb) | |
1256 | { | |
1257 | return 1; | |
1258 | } | |
1259 | static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir, | |
1260 | struct sk_buff *skb) | |
1261 | { | |
1262 | return 1; | |
1263 | } | |
1da177e4 LT |
1264 | #endif |
1265 | ||
1266 | static __inline__ | |
e8a4e377 | 1267 | xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1268 | { |
1269 | switch (family){ | |
1270 | case AF_INET: | |
7e1dc7b6 | 1271 | return (xfrm_address_t *)&fl->u.ip4.daddr; |
1da177e4 | 1272 | case AF_INET6: |
7e1dc7b6 | 1273 | return (xfrm_address_t *)&fl->u.ip6.daddr; |
1da177e4 LT |
1274 | } |
1275 | return NULL; | |
1276 | } | |
1277 | ||
1278 | static __inline__ | |
e8a4e377 | 1279 | xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family) |
1da177e4 LT |
1280 | { |
1281 | switch (family){ | |
1282 | case AF_INET: | |
7e1dc7b6 | 1283 | return (xfrm_address_t *)&fl->u.ip4.saddr; |
1da177e4 | 1284 | case AF_INET6: |
7e1dc7b6 | 1285 | return (xfrm_address_t *)&fl->u.ip6.saddr; |
1da177e4 LT |
1286 | } |
1287 | return NULL; | |
1288 | } | |
1289 | ||
9bb182a7 | 1290 | static __inline__ |
e8a4e377 | 1291 | void xfrm_flowi_addr_get(const struct flowi *fl, |
9bb182a7 YH |
1292 | xfrm_address_t *saddr, xfrm_address_t *daddr, |
1293 | unsigned short family) | |
1294 | { | |
1295 | switch(family) { | |
1296 | case AF_INET: | |
7e1dc7b6 DM |
1297 | memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4)); |
1298 | memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4)); | |
9bb182a7 YH |
1299 | break; |
1300 | case AF_INET6: | |
15e318bd JB |
1301 | saddr->in6 = fl->u.ip6.saddr; |
1302 | daddr->in6 = fl->u.ip6.daddr; | |
9bb182a7 YH |
1303 | break; |
1304 | } | |
1305 | } | |
1306 | ||
1da177e4 | 1307 | static __inline__ int |
f8848067 DM |
1308 | __xfrm4_state_addr_check(const struct xfrm_state *x, |
1309 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 LT |
1310 | { |
1311 | if (daddr->a4 == x->id.daddr.a4 && | |
1312 | (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4)) | |
1313 | return 1; | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | static __inline__ int | |
f8848067 DM |
1318 | __xfrm6_state_addr_check(const struct xfrm_state *x, |
1319 | const xfrm_address_t *daddr, const xfrm_address_t *saddr) | |
1da177e4 | 1320 | { |
ff88b30c YH |
1321 | if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) && |
1322 | (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) || | |
1da177e4 LT |
1323 | ipv6_addr_any((struct in6_addr *)saddr) || |
1324 | ipv6_addr_any((struct in6_addr *)&x->props.saddr))) | |
1325 | return 1; | |
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | static __inline__ int | |
f8848067 DM |
1330 | xfrm_state_addr_check(const struct xfrm_state *x, |
1331 | const xfrm_address_t *daddr, const xfrm_address_t *saddr, | |
1da177e4 LT |
1332 | unsigned short family) |
1333 | { | |
1334 | switch (family) { | |
1335 | case AF_INET: | |
1336 | return __xfrm4_state_addr_check(x, daddr, saddr); | |
1337 | case AF_INET6: | |
1338 | return __xfrm6_state_addr_check(x, daddr, saddr); | |
1339 | } | |
1340 | return 0; | |
1341 | } | |
1342 | ||
e53820de | 1343 | static __inline__ int |
f8848067 | 1344 | xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl, |
e53820de MN |
1345 | unsigned short family) |
1346 | { | |
1347 | switch (family) { | |
1348 | case AF_INET: | |
1349 | return __xfrm4_state_addr_check(x, | |
7e1dc7b6 DM |
1350 | (const xfrm_address_t *)&fl->u.ip4.daddr, |
1351 | (const xfrm_address_t *)&fl->u.ip4.saddr); | |
e53820de MN |
1352 | case AF_INET6: |
1353 | return __xfrm6_state_addr_check(x, | |
7e1dc7b6 DM |
1354 | (const xfrm_address_t *)&fl->u.ip6.daddr, |
1355 | (const xfrm_address_t *)&fl->u.ip6.saddr); | |
e53820de MN |
1356 | } |
1357 | return 0; | |
1358 | } | |
1359 | ||
f8848067 | 1360 | static inline int xfrm_state_kern(const struct xfrm_state *x) |
1da177e4 LT |
1361 | { |
1362 | return atomic_read(&x->tunnel_users); | |
1363 | } | |
1364 | ||
5794708f MN |
1365 | static inline int xfrm_id_proto_match(u8 proto, u8 userproto) |
1366 | { | |
dc00a525 MN |
1367 | return (!userproto || proto == userproto || |
1368 | (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH || | |
1369 | proto == IPPROTO_ESP || | |
1370 | proto == IPPROTO_COMP))); | |
5794708f MN |
1371 | } |
1372 | ||
1da177e4 LT |
1373 | /* |
1374 | * xfrm algorithm information | |
1375 | */ | |
1a6509d9 | 1376 | struct xfrm_algo_aead_info { |
165ecc63 | 1377 | char *geniv; |
1a6509d9 HX |
1378 | u16 icv_truncbits; |
1379 | }; | |
1380 | ||
1da177e4 LT |
1381 | struct xfrm_algo_auth_info { |
1382 | u16 icv_truncbits; | |
1383 | u16 icv_fullbits; | |
1384 | }; | |
1385 | ||
1386 | struct xfrm_algo_encr_info { | |
165ecc63 | 1387 | char *geniv; |
1da177e4 LT |
1388 | u16 blockbits; |
1389 | u16 defkeybits; | |
1390 | }; | |
1391 | ||
1392 | struct xfrm_algo_comp_info { | |
1393 | u16 threshold; | |
1394 | }; | |
1395 | ||
1396 | struct xfrm_algo_desc { | |
1397 | char *name; | |
04ff1260 | 1398 | char *compat; |
1da177e4 | 1399 | u8 available:1; |
7e50f84c | 1400 | u8 pfkey_supported:1; |
1da177e4 | 1401 | union { |
1a6509d9 | 1402 | struct xfrm_algo_aead_info aead; |
1da177e4 LT |
1403 | struct xfrm_algo_auth_info auth; |
1404 | struct xfrm_algo_encr_info encr; | |
1405 | struct xfrm_algo_comp_info comp; | |
1406 | } uinfo; | |
1407 | struct sadb_alg desc; | |
1408 | }; | |
1409 | ||
3328715e SK |
1410 | /* XFRM protocol handlers. */ |
1411 | struct xfrm4_protocol { | |
1412 | int (*handler)(struct sk_buff *skb); | |
1413 | int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1414 | int encap_type); | |
1415 | int (*cb_handler)(struct sk_buff *skb, int err); | |
1416 | int (*err_handler)(struct sk_buff *skb, u32 info); | |
1417 | ||
1418 | struct xfrm4_protocol __rcu *next; | |
1419 | int priority; | |
1420 | }; | |
1421 | ||
7e14ea15 | 1422 | struct xfrm6_protocol { |
1da177e4 | 1423 | int (*handler)(struct sk_buff *skb); |
7e14ea15 SK |
1424 | int (*cb_handler)(struct sk_buff *skb, int err); |
1425 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
1426 | u8 type, u8 code, int offset, __be32 info); | |
d2acc347 | 1427 | |
7e14ea15 | 1428 | struct xfrm6_protocol __rcu *next; |
d2acc347 | 1429 | int priority; |
1da177e4 LT |
1430 | }; |
1431 | ||
1da177e4 LT |
1432 | /* XFRM tunnel handlers. */ |
1433 | struct xfrm_tunnel { | |
aba82695 | 1434 | int (*handler)(struct sk_buff *skb); |
a6337463 | 1435 | int (*err_handler)(struct sk_buff *skb, u32 info); |
d2acc347 | 1436 | |
b33eab08 | 1437 | struct xfrm_tunnel __rcu *next; |
aba82695 FD |
1438 | int priority; |
1439 | }; | |
1440 | ||
1da177e4 | 1441 | struct xfrm6_tunnel { |
d2acc347 HX |
1442 | int (*handler)(struct sk_buff *skb); |
1443 | int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 1444 | u8 type, u8 code, int offset, __be32 info); |
6f0bcf15 | 1445 | struct xfrm6_tunnel __rcu *next; |
d2acc347 | 1446 | int priority; |
1da177e4 LT |
1447 | }; |
1448 | ||
d511337a JP |
1449 | void xfrm_init(void); |
1450 | void xfrm4_init(void); | |
1451 | int xfrm_state_init(struct net *net); | |
1452 | void xfrm_state_fini(struct net *net); | |
1453 | void xfrm4_state_init(void); | |
2f32b51b | 1454 | void xfrm4_protocol_init(void); |
c35b7e72 | 1455 | #ifdef CONFIG_XFRM |
d511337a JP |
1456 | int xfrm6_init(void); |
1457 | void xfrm6_fini(void); | |
1458 | int xfrm6_state_init(void); | |
1459 | void xfrm6_state_fini(void); | |
7e14ea15 SK |
1460 | int xfrm6_protocol_init(void); |
1461 | void xfrm6_protocol_fini(void); | |
c35b7e72 DL |
1462 | #else |
1463 | static inline int xfrm6_init(void) | |
1464 | { | |
1465 | return 0; | |
1466 | } | |
1467 | static inline void xfrm6_fini(void) | |
1468 | { | |
1469 | ; | |
1470 | } | |
1471 | #endif | |
1da177e4 | 1472 | |
558f82ef | 1473 | #ifdef CONFIG_XFRM_STATISTICS |
d511337a JP |
1474 | int xfrm_proc_init(struct net *net); |
1475 | void xfrm_proc_fini(struct net *net); | |
558f82ef MN |
1476 | #endif |
1477 | ||
d511337a | 1478 | int xfrm_sysctl_init(struct net *net); |
b27aeadb | 1479 | #ifdef CONFIG_SYSCTL |
d511337a | 1480 | void xfrm_sysctl_fini(struct net *net); |
b27aeadb AD |
1481 | #else |
1482 | static inline void xfrm_sysctl_fini(struct net *net) | |
1483 | { | |
1484 | } | |
1485 | #endif | |
1486 | ||
d3623099 | 1487 | void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto, |
870a2df4 | 1488 | struct xfrm_address_filter *filter); |
d511337a JP |
1489 | int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, |
1490 | int (*func)(struct xfrm_state *, int, void*), void *); | |
283bc9f3 | 1491 | void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net); |
d511337a JP |
1492 | struct xfrm_state *xfrm_state_alloc(struct net *net); |
1493 | struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr, | |
1494 | const xfrm_address_t *saddr, | |
1495 | const struct flowi *fl, | |
1496 | struct xfrm_tmpl *tmpl, | |
1497 | struct xfrm_policy *pol, int *err, | |
1498 | unsigned short family); | |
1499 | struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, | |
1500 | xfrm_address_t *daddr, | |
1501 | xfrm_address_t *saddr, | |
1502 | unsigned short family, | |
1503 | u8 mode, u8 proto, u32 reqid); | |
c454997e FD |
1504 | struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi, |
1505 | unsigned short family); | |
d511337a JP |
1506 | int xfrm_state_check_expire(struct xfrm_state *x); |
1507 | void xfrm_state_insert(struct xfrm_state *x); | |
1508 | int xfrm_state_add(struct xfrm_state *x); | |
1509 | int xfrm_state_update(struct xfrm_state *x); | |
1510 | struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark, | |
1511 | const xfrm_address_t *daddr, __be32 spi, | |
1512 | u8 proto, unsigned short family); | |
1513 | struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark, | |
1514 | const xfrm_address_t *daddr, | |
1515 | const xfrm_address_t *saddr, | |
1516 | u8 proto, | |
1517 | unsigned short family); | |
41a49cc3 | 1518 | #ifdef CONFIG_XFRM_SUB_POLICY |
d511337a | 1519 | int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, |
283bc9f3 | 1520 | unsigned short family, struct net *net); |
d511337a JP |
1521 | int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, |
1522 | unsigned short family); | |
41a49cc3 MN |
1523 | #else |
1524 | static inline int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, | |
283bc9f3 | 1525 | int n, unsigned short family, struct net *net) |
41a49cc3 MN |
1526 | { |
1527 | return -ENOSYS; | |
1528 | } | |
1529 | ||
1530 | static inline int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, | |
1531 | int n, unsigned short family) | |
1532 | { | |
1533 | return -ENOSYS; | |
1534 | } | |
1535 | #endif | |
af11e316 JHS |
1536 | |
1537 | struct xfrmk_sadinfo { | |
1538 | u32 sadhcnt; /* current hash bkts */ | |
1539 | u32 sadhmcnt; /* max allowed hash bkts */ | |
1540 | u32 sadcnt; /* current running count */ | |
1541 | }; | |
1542 | ||
5a6d3416 JHS |
1543 | struct xfrmk_spdinfo { |
1544 | u32 incnt; | |
1545 | u32 outcnt; | |
1546 | u32 fwdcnt; | |
1547 | u32 inscnt; | |
1548 | u32 outscnt; | |
1549 | u32 fwdscnt; | |
1550 | u32 spdhcnt; | |
1551 | u32 spdhmcnt; | |
1552 | }; | |
1553 | ||
d511337a JP |
1554 | struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); |
1555 | int xfrm_state_delete(struct xfrm_state *x); | |
2e71029e | 1556 | int xfrm_state_flush(struct net *net, u8 proto, bool task_valid); |
d77e38e6 | 1557 | int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid); |
d511337a JP |
1558 | void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si); |
1559 | void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si); | |
1560 | u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq); | |
1561 | int xfrm_init_replay(struct xfrm_state *x); | |
1562 | int xfrm_state_mtu(struct xfrm_state *x, int mtu); | |
ffdb5211 | 1563 | int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload); |
d511337a JP |
1564 | int xfrm_init_state(struct xfrm_state *x); |
1565 | int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb); | |
1566 | int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type); | |
1567 | int xfrm_input_resume(struct sk_buff *skb, int nexthdr); | |
1568 | int xfrm_output_resume(struct sk_buff *skb, int err); | |
7026b1dd | 1569 | int xfrm_output(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1570 | int xfrm_inner_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1571 | void xfrm_local_error(struct sk_buff *skb, int mtu); | |
1572 | int xfrm4_extract_header(struct sk_buff *skb); | |
1573 | int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
1574 | int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi, | |
1575 | int encap_type); | |
1576 | int xfrm4_transport_finish(struct sk_buff *skb, int async); | |
1577 | int xfrm4_rcv(struct sk_buff *skb); | |
1e295370 | 1578 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); |
c4541b41 HX |
1579 | |
1580 | static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi) | |
1581 | { | |
70be6c91 | 1582 | XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL; |
3328715e SK |
1583 | XFRM_SPI_SKB_CB(skb)->family = AF_INET; |
1584 | XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr); | |
1585 | return xfrm_input(skb, nexthdr, spi, 0); | |
c4541b41 HX |
1586 | } |
1587 | ||
d511337a JP |
1588 | int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb); |
1589 | int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1590 | int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1591 | int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb); |
3328715e SK |
1592 | int xfrm4_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1593 | int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol); | |
1594 | int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol); | |
d511337a JP |
1595 | int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family); |
1596 | int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family); | |
d511337a JP |
1597 | void xfrm4_local_error(struct sk_buff *skb, u32 mtu); |
1598 | int xfrm6_extract_header(struct sk_buff *skb); | |
1599 | int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb); | |
63c43787 ND |
1600 | int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi, |
1601 | struct ip6_tnl *t); | |
d511337a | 1602 | int xfrm6_transport_finish(struct sk_buff *skb, int async); |
63c43787 | 1603 | int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t); |
d511337a JP |
1604 | int xfrm6_rcv(struct sk_buff *skb); |
1605 | int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr, | |
1606 | xfrm_address_t *saddr, u8 proto); | |
7b77d161 | 1607 | void xfrm6_local_error(struct sk_buff *skb, u32 mtu); |
7e14ea15 SK |
1608 | int xfrm6_rcv_cb(struct sk_buff *skb, u8 protocol, int err); |
1609 | int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol); | |
1610 | int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol); | |
d511337a | 1611 | int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family); |
7b77d161 | 1612 | int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family); |
d511337a JP |
1613 | __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr); |
1614 | __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr); | |
1615 | int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb); | |
1616 | int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb); | |
ede2059d | 1617 | int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb); |
7026b1dd | 1618 | int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb); |
d511337a JP |
1619 | int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb, |
1620 | u8 **prevhdr); | |
1da177e4 LT |
1621 | |
1622 | #ifdef CONFIG_XFRM | |
d511337a JP |
1623 | int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb); |
1624 | int xfrm_user_policy(struct sock *sk, int optname, | |
1625 | u8 __user *optval, int optlen); | |
1da177e4 LT |
1626 | #else |
1627 | static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) | |
1628 | { | |
1629 | return -ENOPROTOOPT; | |
1630 | } | |
1631 | ||
067b207b | 1632 | static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb) |
1da177e4 LT |
1633 | { |
1634 | /* should not happen */ | |
1635 | kfree_skb(skb); | |
1636 | return 0; | |
1637 | } | |
1da177e4 LT |
1638 | #endif |
1639 | ||
d77e38e6 SK |
1640 | struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif, |
1641 | const xfrm_address_t *saddr, | |
1642 | const xfrm_address_t *daddr, | |
1643 | int family); | |
1644 | ||
0331b1f3 | 1645 | struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp); |
4c563f76 | 1646 | |
d511337a JP |
1647 | void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type); |
1648 | int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk, | |
1649 | int (*func)(struct xfrm_policy *, int, int, void*), | |
1650 | void *); | |
283bc9f3 | 1651 | void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net); |
1da177e4 | 1652 | int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl); |
8ca2e93b JHS |
1653 | struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, |
1654 | u8 type, int dir, | |
4e81bb83 | 1655 | struct xfrm_selector *sel, |
ef41aaa0 EP |
1656 | struct xfrm_sec_ctx *ctx, int delete, |
1657 | int *err); | |
d511337a JP |
1658 | struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u8, int dir, |
1659 | u32 id, int delete, int *err); | |
2e71029e | 1660 | int xfrm_policy_flush(struct net *net, u8 type, bool task_valid); |
880a6fab | 1661 | void xfrm_policy_hash_rebuild(struct net *net); |
1da177e4 | 1662 | u32 xfrm_get_acqseq(void); |
776e9dd9 | 1663 | int verify_spi_info(u8 proto, u32 min, u32 max); |
d511337a | 1664 | int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi); |
e473fcb4 | 1665 | struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, |
bd55775c | 1666 | u8 mode, u32 reqid, u8 proto, |
a70486f0 DM |
1667 | const xfrm_address_t *daddr, |
1668 | const xfrm_address_t *saddr, int create, | |
bd55775c | 1669 | unsigned short family); |
d511337a | 1670 | int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol); |
1da177e4 | 1671 | |
80c9abaa | 1672 | #ifdef CONFIG_XFRM_MIGRATE |
d511337a JP |
1673 | int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1674 | const struct xfrm_migrate *m, int num_bundles, | |
8bafd730 AA |
1675 | const struct xfrm_kmaddress *k, |
1676 | const struct xfrm_encap_tmpl *encap); | |
283bc9f3 | 1677 | struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net); |
d511337a | 1678 | struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x, |
4ab47d47 AA |
1679 | struct xfrm_migrate *m, |
1680 | struct xfrm_encap_tmpl *encap); | |
d511337a JP |
1681 | int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, |
1682 | struct xfrm_migrate *m, int num_bundles, | |
4ab47d47 AA |
1683 | struct xfrm_kmaddress *k, struct net *net, |
1684 | struct xfrm_encap_tmpl *encap); | |
80c9abaa SS |
1685 | #endif |
1686 | ||
d511337a JP |
1687 | int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport); |
1688 | void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid); | |
1689 | int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, | |
1690 | xfrm_address_t *addr); | |
1691 | ||
1692 | void xfrm_input_init(void); | |
1693 | int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq); | |
1694 | ||
1695 | void xfrm_probe_algs(void); | |
1696 | int xfrm_count_pfkey_auth_supported(void); | |
1697 | int xfrm_count_pfkey_enc_supported(void); | |
1698 | struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx); | |
1699 | struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx); | |
1700 | struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id); | |
1701 | struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id); | |
1702 | struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id); | |
1703 | struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe); | |
1704 | struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe); | |
1705 | struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe); | |
1706 | struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len, | |
1707 | int probe); | |
1da177e4 | 1708 | |
70e94e66 YH |
1709 | static inline bool xfrm6_addr_equal(const xfrm_address_t *a, |
1710 | const xfrm_address_t *b) | |
1711 | { | |
1712 | return ipv6_addr_equal((const struct in6_addr *)a, | |
1713 | (const struct in6_addr *)b); | |
1714 | } | |
1715 | ||
1716 | static inline bool xfrm_addr_equal(const xfrm_address_t *a, | |
1717 | const xfrm_address_t *b, | |
1718 | sa_family_t family) | |
1da177e4 LT |
1719 | { |
1720 | switch (family) { | |
1721 | default: | |
1722 | case AF_INET: | |
70e94e66 | 1723 | return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0; |
1da177e4 | 1724 | case AF_INET6: |
70e94e66 | 1725 | return xfrm6_addr_equal(a, b); |
1da177e4 LT |
1726 | } |
1727 | } | |
1728 | ||
77d8d7a6 HX |
1729 | static inline int xfrm_policy_id2dir(u32 index) |
1730 | { | |
1731 | return index & 7; | |
1732 | } | |
1733 | ||
a6483b79 AD |
1734 | #ifdef CONFIG_XFRM |
1735 | static inline int xfrm_aevent_is_on(struct net *net) | |
f8cd5488 | 1736 | { |
be33690d PM |
1737 | struct sock *nlsk; |
1738 | int ret = 0; | |
1739 | ||
1740 | rcu_read_lock(); | |
a6483b79 | 1741 | nlsk = rcu_dereference(net->xfrm.nlsk); |
be33690d PM |
1742 | if (nlsk) |
1743 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS); | |
1744 | rcu_read_unlock(); | |
1745 | return ret; | |
f8cd5488 | 1746 | } |
0f24558e HG |
1747 | |
1748 | static inline int xfrm_acquire_is_on(struct net *net) | |
1749 | { | |
1750 | struct sock *nlsk; | |
1751 | int ret = 0; | |
1752 | ||
1753 | rcu_read_lock(); | |
1754 | nlsk = rcu_dereference(net->xfrm.nlsk); | |
1755 | if (nlsk) | |
1756 | ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE); | |
1757 | rcu_read_unlock(); | |
1758 | ||
1759 | return ret; | |
1760 | } | |
a6483b79 | 1761 | #endif |
f8cd5488 | 1762 | |
ee5c2317 SK |
1763 | static inline int aead_len(struct xfrm_algo_aead *alg) |
1764 | { | |
1765 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1766 | } | |
1767 | ||
85158621 | 1768 | static inline int xfrm_alg_len(const struct xfrm_algo *alg) |
0f99be0d ED |
1769 | { |
1770 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1771 | } | |
1772 | ||
85158621 | 1773 | static inline int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg) |
4447bb33 MW |
1774 | { |
1775 | return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); | |
1776 | } | |
1777 | ||
9736acf3 SK |
1778 | static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn) |
1779 | { | |
1780 | return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32); | |
1781 | } | |
1782 | ||
80c9abaa | 1783 | #ifdef CONFIG_XFRM_MIGRATE |
af2f464e SK |
1784 | static inline int xfrm_replay_clone(struct xfrm_state *x, |
1785 | struct xfrm_state *orig) | |
1786 | { | |
1787 | x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn), | |
1788 | GFP_KERNEL); | |
1789 | if (!x->replay_esn) | |
1790 | return -ENOMEM; | |
1791 | ||
1792 | x->replay_esn->bmp_len = orig->replay_esn->bmp_len; | |
1793 | x->replay_esn->replay_window = orig->replay_esn->replay_window; | |
1794 | ||
1795 | x->preplay_esn = kmemdup(x->replay_esn, | |
1796 | xfrm_replay_state_esn_len(x->replay_esn), | |
1797 | GFP_KERNEL); | |
1798 | if (!x->preplay_esn) { | |
1799 | kfree(x->replay_esn); | |
1800 | return -ENOMEM; | |
1801 | } | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
ee5c2317 SK |
1806 | static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig) |
1807 | { | |
1808 | return kmemdup(orig, aead_len(orig), GFP_KERNEL); | |
1809 | } | |
1810 | ||
1811 | ||
80c9abaa SS |
1812 | static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig) |
1813 | { | |
0f99be0d | 1814 | return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL); |
80c9abaa SS |
1815 | } |
1816 | ||
4447bb33 MW |
1817 | static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig) |
1818 | { | |
1819 | return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL); | |
1820 | } | |
1821 | ||
80c9abaa SS |
1822 | static inline void xfrm_states_put(struct xfrm_state **states, int n) |
1823 | { | |
1824 | int i; | |
1825 | for (i = 0; i < n; i++) | |
1826 | xfrm_state_put(*(states + i)); | |
1827 | } | |
1828 | ||
1829 | static inline void xfrm_states_delete(struct xfrm_state **states, int n) | |
1830 | { | |
1831 | int i; | |
1832 | for (i = 0; i < n; i++) | |
1833 | xfrm_state_delete(*(states + i)); | |
1834 | } | |
1835 | #endif | |
f8cd5488 | 1836 | |
def8b4fa | 1837 | #ifdef CONFIG_XFRM |
00501121 HX |
1838 | static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb) |
1839 | { | |
1840 | return skb->sp->xvec[skb->sp->len - 1]; | |
1841 | } | |
54ef207a SK |
1842 | static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb) |
1843 | { | |
1844 | struct sec_path *sp = skb->sp; | |
1845 | ||
1846 | if (!sp || !sp->olen || sp->len != sp->olen) | |
1847 | return NULL; | |
1848 | ||
1849 | return &sp->ovec[sp->olen - 1]; | |
1850 | } | |
def8b4fa | 1851 | #endif |
00501121 | 1852 | |
d77e38e6 | 1853 | void __net_init xfrm_dev_init(void); |
b81f884a HL |
1854 | |
1855 | #ifdef CONFIG_XFRM_OFFLOAD | |
f6e27114 | 1856 | int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features); |
d77e38e6 SK |
1857 | int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, |
1858 | struct xfrm_user_offload *xuo); | |
1859 | bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x); | |
1860 | ||
1861 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
1862 | { | |
1863 | struct xfrm_state_offload *xso = &x->xso; | |
1864 | ||
1865 | if (xso->dev) | |
1866 | xso->dev->xfrmdev_ops->xdo_dev_state_delete(x); | |
1867 | } | |
1868 | ||
1869 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1870 | { | |
1871 | struct xfrm_state_offload *xso = &x->xso; | |
1872 | struct net_device *dev = xso->dev; | |
1873 | ||
1874 | if (dev && dev->xfrmdev_ops) { | |
1875 | dev->xfrmdev_ops->xdo_dev_state_free(x); | |
1876 | xso->dev = NULL; | |
1877 | dev_put(dev); | |
1878 | } | |
1879 | } | |
1880 | #else | |
f6e27114 SK |
1881 | static inline int validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features) |
1882 | { | |
1883 | return 0; | |
1884 | } | |
1885 | ||
d77e38e6 SK |
1886 | static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo) |
1887 | { | |
1888 | return 0; | |
1889 | } | |
1890 | ||
1891 | static inline void xfrm_dev_state_delete(struct xfrm_state *x) | |
1892 | { | |
1893 | } | |
1894 | ||
1895 | static inline void xfrm_dev_state_free(struct xfrm_state *x) | |
1896 | { | |
1897 | } | |
1898 | ||
1899 | static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) | |
1900 | { | |
1901 | return false; | |
1902 | } | |
1903 | #endif | |
1904 | ||
bf825f81 JHS |
1905 | static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m) |
1906 | { | |
1907 | if (attrs[XFRMA_MARK]) | |
4efd7e83 | 1908 | memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark)); |
bf825f81 JHS |
1909 | else |
1910 | m->v = m->m = 0; | |
1911 | ||
1912 | return m->v & m->m; | |
1913 | } | |
1914 | ||
e3dfa389 | 1915 | static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m) |
bf825f81 | 1916 | { |
1d1e34dd | 1917 | int ret = 0; |
bf825f81 | 1918 | |
1d1e34dd DM |
1919 | if (m->m | m->v) |
1920 | ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m); | |
1921 | return ret; | |
bf825f81 JHS |
1922 | } |
1923 | ||
70be6c91 SK |
1924 | static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x, |
1925 | unsigned int family) | |
1926 | { | |
1927 | bool tunnel = false; | |
1928 | ||
1929 | switch(family) { | |
1930 | case AF_INET: | |
1931 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4) | |
1932 | tunnel = true; | |
1933 | break; | |
1934 | case AF_INET6: | |
1935 | if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6) | |
1936 | tunnel = true; | |
1937 | break; | |
1938 | } | |
1939 | if (tunnel && !(x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL)) | |
1940 | return -EINVAL; | |
1941 | ||
1942 | return 0; | |
1943 | } | |
1da177e4 | 1944 | #endif /* _NET_XFRM_H */ |